diff --git a/Dockerfile b/Dockerfile index d11ce97..2745c6f 100644 --- a/Dockerfile +++ b/Dockerfile @@ -7,7 +7,7 @@ RUN apt-get update && apt-get install bzip2 zip unzip && cp -r /usr/local/go /us ENV GOROOT_BOOTSTRAP=/usr/local/gobt ADD . /wide/gogogo/src/github.com/b3log/wide -ADD vendor/* /go/src/ +ADD vendor/ /go/src/ RUN go install github.com/visualfc/gotools github.com/nsf/gocode github.com/bradfitz/goimports RUN useradd wide && useradd runner diff --git a/vendor/github.com/visualfc/gotools/astview/astdoc.go b/vendor/github.com/visualfc/gotools/astview/astdoc.go new file mode 100644 index 0000000..ae44d3f --- /dev/null +++ b/vendor/github.com/visualfc/gotools/astview/astdoc.go @@ -0,0 +1,685 @@ +// Copyright 2009 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package doc extracts source code documentation from a Go AST. +package astview + +import ( + "go/ast" + "go/token" + "regexp" + "sort" + "strconv" +) + +// ---------------------------------------------------------------------------- + +type typeDoc struct { + // len(decl.Specs) == 1, and the element type is *ast.TypeSpec + // if the type declaration hasn't been seen yet, decl is nil + decl *ast.GenDecl + // values, factory functions, and methods associated with the type + values []*ast.GenDecl // consts and vars + factories map[string]*ast.FuncDecl + methods map[string]*ast.FuncDecl +} + +// docReader accumulates documentation for a single package. +// It modifies the AST: Comments (declaration documentation) +// that have been collected by the DocReader are set to nil +// in the respective AST nodes so that they are not printed +// twice (once when printing the documentation and once when +// printing the corresponding AST node). +// +type docReader struct { + doc *ast.CommentGroup // package documentation, if any + pkgName string + showAll bool + values []*ast.GenDecl // consts and vars + types map[string]*typeDoc + funcs map[string]*ast.FuncDecl + imports map[string]int + bugs []*ast.CommentGroup +} + +func (doc *docReader) init(pkgName string, showAll bool) { + doc.pkgName = pkgName + doc.showAll = showAll + doc.imports = make(map[string]int) + doc.types = make(map[string]*typeDoc) + doc.funcs = make(map[string]*ast.FuncDecl) +} + +func (doc *docReader) addDoc(comments *ast.CommentGroup) { + if doc.doc == nil { + // common case: just one package comment + doc.doc = comments + return + } + + // More than one package comment: Usually there will be only + // one file with a package comment, but it's better to collect + // all comments than drop them on the floor. + // (This code isn't particularly clever - no amortized doubling is + // used - but this situation occurs rarely and is not time-critical.) + n1 := len(doc.doc.List) + n2 := len(comments.List) + list := make([]*ast.Comment, n1+1+n2) // + 1 for separator line + copy(list, doc.doc.List) + list[n1] = &ast.Comment{token.NoPos, "//"} // separator line + copy(list[n1+1:], comments.List) + doc.doc = &ast.CommentGroup{list} +} + +func (doc *docReader) addType(decl *ast.GenDecl) { + spec := decl.Specs[0].(*ast.TypeSpec) + typ := doc.lookupTypeDoc(spec.Name.Name) + // typ should always be != nil since declared types + // are always named - be conservative and check + if typ != nil { + // a type should be added at most once, so typ.decl + // should be nil - if it isn't, simply overwrite it + typ.decl = decl + } +} + +func (doc *docReader) lookupTypeDoc(name string) *typeDoc { + if name == "" { + return nil // no type docs for anonymous types + } + if tdoc, found := doc.types[name]; found { + return tdoc + } + // type wasn't found - add one without declaration + tdoc := &typeDoc{nil, nil, make(map[string]*ast.FuncDecl), make(map[string]*ast.FuncDecl)} + doc.types[name] = tdoc + return tdoc +} + +func docBaseTypeName(typ ast.Expr, showAll bool) string { + switch t := typ.(type) { + case *ast.Ident: + // if the type is not exported, the effect to + // a client is as if there were no type name + if showAll || t.IsExported() { + return t.Name + } + case *ast.StarExpr: + return docBaseTypeName(t.X, showAll) + } + return "" +} + +func (doc *docReader) addValue(decl *ast.GenDecl) { + // determine if decl should be associated with a type + // Heuristic: For each typed entry, determine the type name, if any. + // If there is exactly one type name that is sufficiently + // frequent, associate the decl with the respective type. + domName := "" + domFreq := 0 + prev := "" + for _, s := range decl.Specs { + if v, ok := s.(*ast.ValueSpec); ok { + name := "" + switch { + case v.Type != nil: + // a type is present; determine its name + name = docBaseTypeName(v.Type, doc.showAll) + case decl.Tok == token.CONST: + // no type is present but we have a constant declaration; + // use the previous type name (w/o more type information + // we cannot handle the case of unnamed variables with + // initializer expressions except for some trivial cases) + name = prev + } + if name != "" { + // entry has a named type + if domName != "" && domName != name { + // more than one type name - do not associate + // with any type + domName = "" + break + } + domName = name + domFreq++ + } + prev = name + } + } + + // determine values list + const threshold = 0.75 + values := &doc.values + if domName != "" && domFreq >= int(float64(len(decl.Specs))*threshold) { + // typed entries are sufficiently frequent + typ := doc.lookupTypeDoc(domName) + if typ != nil { + values = &typ.values // associate with that type + } + } + + *values = append(*values, decl) +} + +// Helper function to set the table entry for function f. Makes sure that +// at least one f with associated documentation is stored in table, if there +// are multiple f's with the same name. +func setFunc(table map[string]*ast.FuncDecl, f *ast.FuncDecl) { + name := f.Name.Name + if g, exists := table[name]; exists && g.Doc != nil { + // a function with the same name has already been registered; + // since it has documentation, assume f is simply another + // implementation and ignore it + // TODO(gri) consider collecting all functions, or at least + // all comments + return + } + // function doesn't exist or has no documentation; use f + table[name] = f +} + +func (doc *docReader) addFunc(fun *ast.FuncDecl) { + name := fun.Name.Name + + // determine if it should be associated with a type + if fun.Recv != nil { + // method + typ := doc.lookupTypeDoc(docBaseTypeName(fun.Recv.List[0].Type, doc.showAll)) + if typ != nil { + // exported receiver type + setFunc(typ.methods, fun) + } + // otherwise don't show the method + // TODO(gri): There may be exported methods of non-exported types + // that can be called because of exported values (consts, vars, or + // function results) of that type. Could determine if that is the + // case and then show those methods in an appropriate section. + return + } + + // perhaps a factory function + // determine result type, if any + if fun.Type.Results.NumFields() >= 1 { + res := fun.Type.Results.List[0] + if len(res.Names) <= 1 { + // exactly one (named or anonymous) result associated + // with the first type in result signature (there may + // be more than one result) + tname := docBaseTypeName(res.Type, doc.showAll) + typ := doc.lookupTypeDoc(tname) + if typ != nil { + // named and exported result type + + // Work-around for failure of heuristic: In package os + // too many functions are considered factory functions + // for the Error type. Eliminate manually for now as + // this appears to be the only important case in the + // current library where the heuristic fails. + if doc.pkgName == "os" && tname == "Error" && + name != "NewError" && name != "NewSyscallError" { + // not a factory function for os.Error + setFunc(doc.funcs, fun) // treat as ordinary function + return + } + + setFunc(typ.factories, fun) + return + } + } + } + + // ordinary function + setFunc(doc.funcs, fun) +} + +func (doc *docReader) addDecl(decl ast.Decl) { + switch d := decl.(type) { + case *ast.GenDecl: + if len(d.Specs) > 0 { + switch d.Tok { + case token.IMPORT: + // imports are handled individually + for _, spec := range d.Specs { + if s, ok := spec.(*ast.ImportSpec); ok { + if import_, err := strconv.Unquote(s.Path.Value); err == nil { + doc.imports[import_] = 1 + } + } + } + case token.CONST, token.VAR: + // constants and variables are always handled as a group + doc.addValue(d) + case token.TYPE: + // types are handled individually + for _, spec := range d.Specs { + // make a (fake) GenDecl node for this TypeSpec + // (we need to do this here - as opposed to just + // for printing - so we don't lose the GenDecl + // documentation) + // + // TODO(gri): Consider just collecting the TypeSpec + // node (and copy in the GenDecl.doc if there is no + // doc in the TypeSpec - this is currently done in + // makeTypeDocs below). Simpler data structures, but + // would lose GenDecl documentation if the TypeSpec + // has documentation as well. + doc.addType(&ast.GenDecl{d.Doc, d.Pos(), token.TYPE, token.NoPos, []ast.Spec{spec}, token.NoPos}) + // A new GenDecl node is created, no need to nil out d.Doc. + } + } + } + case *ast.FuncDecl: + doc.addFunc(d) + } +} + +func copyCommentList(list []*ast.Comment) []*ast.Comment { + return append([]*ast.Comment(nil), list...) +} + +var ( + bug_markers = regexp.MustCompile("^/[/*][ \t]*BUG\\(.*\\):[ \t]*") // BUG(uid): + bug_content = regexp.MustCompile("[^ \n\r\t]+") // at least one non-whitespace char +) + +// addFile adds the AST for a source file to the docReader. +// Adding the same AST multiple times is a no-op. +// +func (doc *docReader) addFile(src *ast.File) { + // add package documentation + if src.Doc != nil { + doc.addDoc(src.Doc) + src.Doc = nil // doc consumed - remove from ast.File node + } + + // add all declarations + for _, decl := range src.Decls { + doc.addDecl(decl) + } + + // collect BUG(...) comments + for _, c := range src.Comments { + text := c.List[0].Text + if m := bug_markers.FindStringIndex(text); m != nil { + // found a BUG comment; maybe empty + if btxt := text[m[1]:]; bug_content.MatchString(btxt) { + // non-empty BUG comment; collect comment without BUG prefix + list := copyCommentList(c.List) + list[0].Text = text[m[1]:] + doc.bugs = append(doc.bugs, &ast.CommentGroup{list}) + } + } + } + src.Comments = nil // consumed unassociated comments - remove from ast.File node +} + +func NewFileDoc(file *ast.File, showAll bool) *PackageDoc { + var r docReader + r.init(file.Name.Name, showAll) + r.addFile(file) + return r.newDoc("", nil) +} + +func NewPackageDoc(pkg *ast.Package, importpath string, showAll bool) *PackageDoc { + var r docReader + r.init(pkg.Name, showAll) + filenames := make([]string, len(pkg.Files)) + i := 0 + for filename, f := range pkg.Files { + r.addFile(f) + filenames[i] = filename + i++ + } + return r.newDoc(importpath, filenames) +} + +// ---------------------------------------------------------------------------- +// Conversion to external representation + +// ValueDoc is the documentation for a group of declared +// values, either vars or consts. +// +type ValueDoc struct { + Doc string + Decl *ast.GenDecl + order int +} + +type sortValueDoc []*ValueDoc + +func (p sortValueDoc) Len() int { return len(p) } +func (p sortValueDoc) Swap(i, j int) { p[i], p[j] = p[j], p[i] } + +func declName(d *ast.GenDecl) string { + if len(d.Specs) != 1 { + return "" + } + + switch v := d.Specs[0].(type) { + case *ast.ValueSpec: + return v.Names[0].Name + case *ast.TypeSpec: + return v.Name.Name + } + + return "" +} + +func (p sortValueDoc) Less(i, j int) bool { + // sort by name + // pull blocks (name = "") up to top + // in original order + if ni, nj := declName(p[i].Decl), declName(p[j].Decl); ni != nj { + return ni < nj + } + return p[i].order < p[j].order +} + +func makeValueDocs(list []*ast.GenDecl, tok token.Token) []*ValueDoc { + d := make([]*ValueDoc, len(list)) // big enough in any case + n := 0 + for i, decl := range list { + if decl.Tok == tok { + d[n] = &ValueDoc{decl.Doc.Text(), decl, i} + n++ + decl.Doc = nil // doc consumed - removed from AST + } + } + d = d[0:n] + sort.Sort(sortValueDoc(d)) + return d +} + +// FuncDoc is the documentation for a func declaration, +// either a top-level function or a method function. +// +type FuncDoc struct { + Doc string + Recv ast.Expr // TODO(rsc): Would like string here + Name string + Decl *ast.FuncDecl +} + +type sortFuncDoc []*FuncDoc + +func (p sortFuncDoc) Len() int { return len(p) } +func (p sortFuncDoc) Swap(i, j int) { p[i], p[j] = p[j], p[i] } +func (p sortFuncDoc) Less(i, j int) bool { return p[i].Name < p[j].Name } + +func makeFuncDocs(m map[string]*ast.FuncDecl) []*FuncDoc { + d := make([]*FuncDoc, len(m)) + i := 0 + for _, f := range m { + doc := new(FuncDoc) + doc.Doc = f.Doc.Text() + f.Doc = nil // doc consumed - remove from ast.FuncDecl node + if f.Recv != nil { + doc.Recv = f.Recv.List[0].Type + } + doc.Name = f.Name.Name + doc.Decl = f + d[i] = doc + i++ + } + sort.Sort(sortFuncDoc(d)) + return d +} + +// TypeDoc is the documentation for a declared type. +// Consts and Vars are sorted lists of constants and variables of (mostly) that type. +// Factories is a sorted list of factory functions that return that type. +// Methods is a sorted list of method functions on that type. +type TypeDoc struct { + Doc string + Type *ast.TypeSpec + Consts []*ValueDoc + Vars []*ValueDoc + Funcs []*FuncDoc + Methods []*FuncDoc + Decl *ast.GenDecl + order int +} + +type sortTypeDoc []*TypeDoc + +func (p sortTypeDoc) Len() int { return len(p) } +func (p sortTypeDoc) Swap(i, j int) { p[i], p[j] = p[j], p[i] } +func (p sortTypeDoc) Less(i, j int) bool { + // sort by name + // pull blocks (name = "") up to top + // in original order + if ni, nj := p[i].Type.Name.Name, p[j].Type.Name.Name; ni != nj { + return ni < nj + } + return p[i].order < p[j].order +} + +// NOTE(rsc): This would appear not to be correct for type ( ) +// blocks, but the doc extractor above has split them into +// individual declarations. +func (doc *docReader) makeTypeDocs(m map[string]*typeDoc) []*TypeDoc { + d := make([]*TypeDoc, len(m)) + i := 0 + for _, old := range m { + // all typeDocs should have a declaration associated with + // them after processing an entire package - be conservative + // and check + if decl := old.decl; decl != nil { + typespec := decl.Specs[0].(*ast.TypeSpec) + t := new(TypeDoc) + doc := typespec.Doc + typespec.Doc = nil // doc consumed - remove from ast.TypeSpec node + if doc == nil { + // no doc associated with the spec, use the declaration doc, if any + doc = decl.Doc + } + decl.Doc = nil // doc consumed - remove from ast.Decl node + t.Doc = doc.Text() + t.Type = typespec + t.Consts = makeValueDocs(old.values, token.CONST) + t.Vars = makeValueDocs(old.values, token.VAR) + t.Funcs = makeFuncDocs(old.factories) + t.Methods = makeFuncDocs(old.methods) + t.Decl = old.decl + t.order = i + d[i] = t + i++ + } else { + // no corresponding type declaration found - move any associated + // values, factory functions, and methods back to the top-level + // so that they are not lost (this should only happen if a package + // file containing the explicit type declaration is missing or if + // an unqualified type name was used after a "." import) + // 1) move values + doc.values = append(doc.values, old.values...) + // 2) move factory functions + for name, f := range old.factories { + doc.funcs[name] = f + } + // 3) move methods + for name, f := range old.methods { + // don't overwrite functions with the same name + if _, found := doc.funcs[name]; !found { + doc.funcs[name] = f + } + } + } + } + d = d[0:i] // some types may have been ignored + sort.Sort(sortTypeDoc(d)) + return d +} + +func makeBugDocs(list []*ast.CommentGroup) []string { + d := make([]string, len(list)) + for i, g := range list { + d[i] = g.Text() + } + return d +} + +// PackageDoc is the documentation for an entire package. +// +type PackageDoc struct { + PackageName string + ImportPath string + Imports []string + Filenames []string + Doc string + Consts []*ValueDoc + Types []*TypeDoc + Vars []*ValueDoc + Funcs []*FuncDoc + Factorys []*FuncDoc + Bugs []string +} + +// newDoc returns the accumulated documentation for the package. +// +func (doc *docReader) newDoc(importpath string, filenames []string) *PackageDoc { + p := new(PackageDoc) + p.PackageName = doc.pkgName + p.ImportPath = importpath + sort.Strings(filenames) + p.Filenames = filenames + p.Doc = doc.doc.Text() + p.Imports = sortedKeys(doc.imports) + // makeTypeDocs may extend the list of doc.values and + // doc.funcs and thus must be called before any other + // function consuming those lists + p.Types = doc.makeTypeDocs(doc.types) + p.Consts = makeValueDocs(doc.values, token.CONST) + p.Vars = makeValueDocs(doc.values, token.VAR) + p.Funcs = makeFuncDocs(doc.funcs) + p.Bugs = makeBugDocs(doc.bugs) + + for _, d := range p.Types { + switch d.Type.Type.(type) { + case *ast.StructType: + p.Factorys = append(p.Factorys, d.Funcs...) + d.Funcs = make([]*FuncDoc, 0) + case *ast.InterfaceType: + p.Factorys = append(p.Factorys, d.Funcs...) + d.Funcs = make([]*FuncDoc, 0) + default: + p.Vars = append(p.Vars, d.Vars...) + d.Vars = make([]*ValueDoc, 0) + p.Consts = append(p.Consts, d.Consts...) + d.Consts = make([]*ValueDoc, 0) + } + } + return p +} + +func sortedKeys(m map[string]int) []string { + list := make([]string, len(m)) + i := 0 + for key := range m { + list[i] = key + i++ + } + sort.Strings(list) + return list +} + +// ---------------------------------------------------------------------------- +// Filtering by name + +type Filter func(string) bool + +func matchFields(fields *ast.FieldList, f Filter) bool { + if fields != nil { + for _, field := range fields.List { + for _, name := range field.Names { + if f(name.Name) { + return true + } + } + } + } + return false +} + +func matchDecl(d *ast.GenDecl, f Filter) bool { + for _, d := range d.Specs { + switch v := d.(type) { + case *ast.ValueSpec: + for _, name := range v.Names { + if f(name.Name) { + return true + } + } + case *ast.TypeSpec: + if f(v.Name.Name) { + return true + } + switch t := v.Type.(type) { + case *ast.StructType: + if matchFields(t.Fields, f) { + return true + } + case *ast.InterfaceType: + if matchFields(t.Methods, f) { + return true + } + } + } + } + return false +} + +func filterValueDocs(a []*ValueDoc, f Filter) []*ValueDoc { + w := 0 + for _, vd := range a { + if matchDecl(vd.Decl, f) { + a[w] = vd + w++ + } + } + return a[0:w] +} + +func filterFuncDocs(a []*FuncDoc, f Filter) []*FuncDoc { + w := 0 + for _, fd := range a { + if f(fd.Name) { + a[w] = fd + w++ + } + } + return a[0:w] +} + +func filterTypeDocs(a []*TypeDoc, f Filter) []*TypeDoc { + w := 0 + for _, td := range a { + n := 0 // number of matches + if matchDecl(td.Decl, f) { + n = 1 + } else { + // type name doesn't match, but we may have matching consts, vars, factories or methods + td.Consts = filterValueDocs(td.Consts, f) + td.Vars = filterValueDocs(td.Vars, f) + td.Funcs = filterFuncDocs(td.Funcs, f) + td.Methods = filterFuncDocs(td.Methods, f) + n += len(td.Consts) + len(td.Vars) + len(td.Funcs) + len(td.Methods) + } + if n > 0 { + a[w] = td + w++ + } + } + return a[0:w] +} + +// Filter eliminates documentation for names that don't pass through the filter f. +// TODO: Recognize "Type.Method" as a name. +// +func (p *PackageDoc) Filter(f Filter) { + p.Consts = filterValueDocs(p.Consts, f) + p.Vars = filterValueDocs(p.Vars, f) + p.Types = filterTypeDocs(p.Types, f) + p.Funcs = filterFuncDocs(p.Funcs, f) + p.Doc = "" // don't show top-level package doc +} diff --git a/vendor/github.com/visualfc/gotools/astview/astview.go b/vendor/github.com/visualfc/gotools/astview/astview.go new file mode 100644 index 0000000..af07319 --- /dev/null +++ b/vendor/github.com/visualfc/gotools/astview/astview.go @@ -0,0 +1,346 @@ +// Copyright 2011-2015 visualfc . All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package astview + +import ( + "fmt" + "go/ast" + "go/parser" + "go/token" + "io" + "io/ioutil" + "os" + "strings" + + "github.com/visualfc/gotools/command" + + "golang.org/x/tools/go/types" +) + +var Command = &command.Command{ + Run: runAstView, + UsageLine: "astview [-stdin] files...", + Short: "print go files astview", + Long: `print go files astview`, +} + +var astViewStdin bool + +func init() { + Command.Flag.BoolVar(&astViewStdin, "stdin", false, "input from stdin") +} + +func runAstView(cmd *command.Command, args []string) error { + if len(args) == 0 { + cmd.Usage() + return os.ErrInvalid + } + if astViewStdin { + view, err := NewFilePackageSource(args[0], os.Stdin, true) + if err != nil { + fmt.Fprintf(os.Stderr, "astview: %s", err) + command.SetExitStatus(3) + command.Exit() + } + view.PrintTree(os.Stdout) + } else { + err := PrintFilesTree(args, os.Stdout, true) + if err != nil { + fmt.Fprintf(os.Stderr, "astview:%s", err) + command.SetExitStatus(3) + command.Exit() + } + } + return nil +} + +const ( + tag_package = "p" + tag_imports_folder = "+m" + tag_import = "mm" + tag_type = "t" + tag_struct = "s" + tag_interface = "i" + tag_value = "v" + tag_const = "c" + tag_func = "f" + tag_value_folder = "+v" + tag_const_folder = "+c" + tag_func_folder = "+f" + tag_factor_folder = "+tf" + tag_type_method = "tm" + tag_type_factor = "tf" + tag_type_value = "tv" +) + +type PackageView struct { + fset *token.FileSet + pdoc *PackageDoc + pkg *ast.Package + expr bool +} + +var AllFiles []string + +func (p *PackageView) posFileIndex(pos token.Position) int { + var index = -1 + for i := 0; i < len(AllFiles); i++ { + if AllFiles[i] == pos.Filename { + index = i + break + } + } + if index == -1 { + AllFiles = append(AllFiles, pos.Filename) + index = len(AllFiles) - 1 + } + return index +} + +func (p *PackageView) posText(pos token.Position) (s string) { + index := p.posFileIndex(pos) + return fmt.Sprintf("%d:%d:%d", index, pos.Line, pos.Column) +} + +func NewFilePackage(filename string) (*PackageView, error) { + p := new(PackageView) + p.fset = token.NewFileSet() + file, err := parser.ParseFile(p.fset, filename, nil, parser.AllErrors) + if file == nil { + return nil, err + } + m := make(map[string]*ast.File) + m[filename] = file + pkg, err := ast.NewPackage(p.fset, m, nil, nil) + if err != nil { + return nil, err + } + p.pkg = pkg + p.pdoc = NewPackageDoc(pkg, pkg.Name, true) + return p, nil +} + +func NewPackageView(pkg *ast.Package, fset *token.FileSet, expr bool) (*PackageView, error) { + p := new(PackageView) + p.fset = fset + p.pkg = pkg + p.pdoc = NewPackageDoc(pkg, pkg.Name, true) + p.expr = expr + return p, nil +} + +func ParseFiles(fset *token.FileSet, filenames []string, mode parser.Mode) (pkgs map[string]*ast.Package, pkgsfiles []string, first error) { + pkgs = make(map[string]*ast.Package) + for _, filename := range filenames { + if src, err := parser.ParseFile(fset, filename, nil, mode); src != nil { + name := src.Name.Name + pkg, found := pkgs[name] + if !found { + pkg = &ast.Package{ + Name: name, + Files: make(map[string]*ast.File), + } + pkgs[name] = pkg + } + pkg.Files[filename] = src + pkgsfiles = append(pkgsfiles, filename) + } else { + first = err + return + } + } + return +} + +func PrintFilesTree(filenames []string, w io.Writer, expr bool) error { + fset := token.NewFileSet() + pkgs, pkgsfiles, err := ParseFiles(fset, filenames, parser.AllErrors) + if err != nil { + return err + } + AllFiles = pkgsfiles + for i := 0; i < len(AllFiles); i++ { + fmt.Fprintf(w, "@%s\n", AllFiles[i]) + } + for _, pkg := range pkgs { + view, err := NewPackageView(pkg, fset, expr) + if err != nil { + return err + } + view.PrintTree(w) + } + return nil +} + +func NewFilePackageSource(filename string, f *os.File, expr bool) (*PackageView, error) { + src, err := ioutil.ReadAll(f) + if err != nil { + return nil, err + } + p := new(PackageView) + p.fset = token.NewFileSet() + p.expr = expr + file, err := parser.ParseFile(p.fset, filename, src, 0) + if err != nil { + return nil, err + } + m := make(map[string]*ast.File) + m[filename] = file + pkg, err := ast.NewPackage(p.fset, m, nil, nil) + if err != nil { + return nil, err + } + + p.pdoc = NewPackageDoc(pkg, pkg.Name, true) + return p, nil +} + +func (p *PackageView) printFuncsHelper(w io.Writer, funcs []*FuncDoc, level int, tag string, tag_folder string) { + for _, f := range funcs { + pos := p.fset.Position(f.Decl.Pos()) + if p.expr { + fmt.Fprintf(w, "%d,%s,%s,%s@%s\n", level, tag, f.Name, p.posText(pos), types.ExprString(f.Decl.Type)) + } else { + fmt.Fprintf(w, "%d,%s,%s,%s\n", level, tag, f.Name, p.posText(pos)) + } + } +} + +func (p *PackageView) PrintVars(w io.Writer, vars []*ValueDoc, level int, tag string, tag_folder string) { + if len(tag_folder) > 0 && len(vars) > 0 { + if tag_folder == tag_value_folder { + fmt.Fprintf(w, "%d,%s,Variables\n", level, tag_folder) + } else if tag_folder == tag_const_folder { + fmt.Fprintf(w, "%d,%s,Constants\n", level, tag_folder) + } + level++ + } + for _, v := range vars { + if v.Decl == nil { + continue + } + for _, s := range v.Decl.Specs { + if m, ok := s.(*ast.ValueSpec); ok { + pos := p.fset.Position(m.Pos()) + for i := 0; i < len(m.Names); i++ { + if p.expr && m.Type != nil { + fmt.Fprintf(w, "%d,%s,%s,%s@%s\n", level, tag, m.Names[i], p.posText(pos), types.ExprString(m.Type)) + } else { + fmt.Fprintf(w, "%d,%s,%s,%s\n", level, tag, m.Names[i], p.posText(pos)) + } + } + } + } + } +} +func (p *PackageView) PrintTypes(w io.Writer, types []*TypeDoc, level int) { + for _, d := range types { + if d.Decl == nil { + continue + } + typespec := d.Decl.Specs[0].(*ast.TypeSpec) + var tag = tag_type + if _, ok := typespec.Type.(*ast.InterfaceType); ok { + tag = tag_interface + } else if _, ok := typespec.Type.(*ast.StructType); ok { + tag = tag_struct + } + pos := p.fset.Position(d.Decl.Pos()) + fmt.Fprintf(w, "%d,%s,%s,%s\n", level, tag, d.Type.Name, p.posText(pos)) + p.printFuncsHelper(w, d.Funcs, level+1, tag_type_factor, "") + p.printFuncsHelper(w, d.Methods, level+1, tag_type_method, "") + p.PrintTypeFields(w, d.Decl, level+1) + //p.PrintVars(w, d.Consts, level+1, tag_const, "") + //p.PrintVars(w, d.Vars, level+1, tag_value, "") + } +} + +func (p *PackageView) PrintTypeFields(w io.Writer, decl *ast.GenDecl, level int) { + spec, ok := decl.Specs[0].(*ast.TypeSpec) + if ok == false { + return + } + switch d := spec.Type.(type) { + case *ast.StructType: + for _, list := range d.Fields.List { + if list.Names == nil { + continue + } + for _, m := range list.Names { + pos := p.fset.Position(m.Pos()) + if list.Type != nil { + fmt.Fprintf(w, "%d,%s,%s,%s@%s\n", level, tag_type_value, m.Name, p.posText(pos), types.ExprString(list.Type)) + } else { + fmt.Fprintf(w, "%d,%s,%s,%s\n", level, tag_type_value, m.Name, p.posText(pos)) + } + } + } + case *ast.InterfaceType: + for _, list := range d.Methods.List { + if list.Names == nil { + continue + } + for _, m := range list.Names { + pos := p.fset.Position(m.Pos()) + fmt.Fprintf(w, "%d,%s,%s,%s\n", level, tag_type_method, m.Name, p.posText(pos)) + } + } + } +} + +func (p *PackageView) PrintHeader(w io.Writer, level int) { + fmt.Fprintf(w, "%d,%s,%s\n", level, tag_package, p.pdoc.PackageName) +} + +func (p *PackageView) PrintImports(w io.Writer, level int, tag, tag_folder string) { + if tag_folder != "" && len(p.pdoc.Imports) > 0 { + fmt.Fprintf(w, "%d,%s,%s\n", level, tag_folder, "Imports") + level++ + } + for _, name := range p.pdoc.Imports { + vname := "\"" + name + "\"" + var ps []string + for _, file := range p.pkg.Files { + for _, v := range file.Imports { + if v.Path.Value == vname { + pos := p.fset.Position(v.Pos()) + ps = append(ps, p.posText(pos)) + } + } + } + fmt.Fprintf(w, "%d,%s,%s,%s\n", level, tag, name, strings.Join(ps, ";")) + } +} + +func (p *PackageView) PrintFuncs(w io.Writer, level int, tag_folder string) { + hasFolder := false + if len(p.pdoc.Funcs) > 0 || len(p.pdoc.Factorys) > 0 { + hasFolder = true + } + if !hasFolder { + return + } + if len(tag_folder) > 0 { + fmt.Fprintf(w, "%d,%s,Functions\n", level, tag_folder) + level++ + } + p.printFuncsHelper(w, p.pdoc.Factorys, level, tag_type_factor, tag_func_folder) + p.printFuncsHelper(w, p.pdoc.Funcs, level, tag_func, tag_func_folder) +} + +func (p *PackageView) PrintPackage(w io.Writer, level int) { + p.PrintHeader(w, level) + level++ + p.PrintImports(w, level, tag_import, tag_imports_folder) + p.PrintVars(w, p.pdoc.Vars, level, tag_value, tag_value_folder) + p.PrintVars(w, p.pdoc.Consts, level, tag_const, tag_const_folder) + p.PrintFuncs(w, level, tag_func_folder) + p.PrintTypes(w, p.pdoc.Types, level) +} + +// level,tag,pos@info +func (p *PackageView) PrintTree(w io.Writer) { + p.PrintPackage(w, 0) +} diff --git a/vendor/github.com/visualfc/gotools/command/command.go b/vendor/github.com/visualfc/gotools/command/command.go new file mode 100644 index 0000000..a20a3fb --- /dev/null +++ b/vendor/github.com/visualfc/gotools/command/command.go @@ -0,0 +1,343 @@ +// Copyright 2011 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +//modify 2013-2014 visualfc + +package command + +import ( + "bytes" + "flag" + "fmt" + "io" + "log" + "os" + "strings" + "sync" + "text/template" + "unicode" + "unicode/utf8" +) + +// A Command is an implementation of a go command +// like go build or go fix. +type Command struct { + // Run runs the command. + // The args are the arguments after the command name. + Run func(cmd *Command, args []string) error + + // UsageLine is the one-line usage message. + // The first word in the line is taken to be the command name. + UsageLine string + + // Short is the short description shown in the 'go help' output. + Short string + + // Long is the long message shown in the 'go help ' output. + Long string + + // Flag is a set of flags specific to this command. + Flag flag.FlagSet + + // CustomFlags indicates that the command will do its own + // flag parsing. + CustomFlags bool + + Stdin io.Reader + Stdout io.Writer + Stderr io.Writer +} + +// Name returns the command's name: the first word in the usage line. +func (c *Command) Name() string { + name := c.UsageLine + i := strings.Index(name, " ") + if i >= 0 { + name = name[:i] + } + return name +} + +func (c *Command) Usage() { + fmt.Fprintf(os.Stderr, "usage: %s %s\n", AppName, c.UsageLine) + c.Flag.SetOutput(os.Stderr) + c.Flag.PrintDefaults() + //fmt.Fprintf(os.Stderr, "%s\n", strings.TrimSpace(c.Long)) + os.Exit(2) +} + +func (c *Command) PrintUsage() { + fmt.Fprintf(Stderr, "usage: %s %s\n", AppName, c.UsageLine) + c.Flag.SetOutput(Stderr) + c.Flag.PrintDefaults() +} + +// Runnable reports whether the command can be run; otherwise +// it is a documentation pseudo-command such as importpath. +func (c *Command) Runnable() bool { + return c.Run != nil +} + +func (c *Command) Println(args ...interface{}) { + fmt.Fprintln(c.Stdout, args...) +} + +func (c *Command) Printf(format string, args ...interface{}) { + fmt.Fprintf(c.Stdout, format, args...) +} + +var commands []*Command + +func Register(cmd *Command) { + commands = append(commands, cmd) +} + +func CommandList() (cmds []string) { + for _, cmd := range commands { + cmds = append(cmds, cmd.Name()) + } + return +} + +var exitStatus = 0 +var exitMu sync.Mutex + +func SetExitStatus(n int) { + exitMu.Lock() + if exitStatus < n { + exitStatus = n + } + exitMu.Unlock() +} + +var ( + Stdout io.Writer = os.Stdout + Stderr io.Writer = os.Stderr + Stdin io.Reader = os.Stdin +) + +func RunArgs(arguments []string, stdin io.Reader, stdout io.Writer, stderr io.Writer) error { + flag.CommandLine.Parse(arguments) + args := flag.Args() + if len(args) < 1 { + printUsage(os.Stderr) + return os.ErrInvalid + } + + if len(args) == 1 && strings.TrimSpace(args[0]) == "" { + printUsage(os.Stderr) + return os.ErrInvalid + } + + if args[0] == "help" { + if !help(args[1:]) { + return os.ErrInvalid + } + return nil + } + + for _, cmd := range commands { + if cmd.Name() == args[0] && cmd.Run != nil { + cmd.Flag.Usage = func() { cmd.Usage() } + if cmd.CustomFlags { + args = args[1:] + } else { + cmd.Flag.Parse(args[1:]) + args = cmd.Flag.Args() + } + cmd.Stdin = stdin + cmd.Stdout = stdout + cmd.Stderr = stderr + return cmd.Run(cmd, args) + } + } + + fmt.Fprintf(os.Stderr, "%s: unknown subcommand %q\nRun '%s help' for usage.\n", + AppName, args[0], AppName) + return os.ErrInvalid +} + +func Main() { + flag.Usage = usage + flag.Parse() + log.SetFlags(0) + + args := flag.Args() + if len(args) < 1 { + usage() + } + + if len(args) == 1 && strings.TrimSpace(args[0]) == "" { + usage() + } + + if args[0] == "help" { + if !help(args[1:]) { + os.Exit(2) + } + return + } + + for _, cmd := range commands { + if cmd.Name() == args[0] && cmd.Run != nil { + cmd.Flag.Usage = func() { cmd.Usage() } + if cmd.CustomFlags { + args = args[1:] + } else { + cmd.Flag.Parse(args[1:]) + args = cmd.Flag.Args() + } + cmd.Stdin = Stdin + cmd.Stdout = Stdout + cmd.Stderr = Stderr + cmd.Run(cmd, args) + Exit() + return + } + } + + fmt.Fprintf(os.Stderr, "%s: unknown subcommand %q\nRun '%s help' for usage.\n", + AppName, args[0], AppName) + SetExitStatus(2) + Exit() +} + +var AppInfo string = "LiteIDE golang tool." +var AppName string = "tools" + +var usageTemplate = ` +Usage: + + {{AppName}} command [arguments] + +The commands are: +{{range .}}{{if .Runnable}} + {{.Name | printf "%-11s"}} {{.Short}}{{end}}{{end}} + +Use "{{AppName}} help [command]" for more information about a command. + +Additional help topics: +{{range .}}{{if not .Runnable}} + {{.Name | printf "%-11s"}} {{.Short}}{{end}}{{end}} + +Use "{{AppName}} help [topic]" for more information about that topic. + +` + +var helpTemplate = `{{if .Runnable}}usage: {{AppName}} {{.UsageLine}} + +{{end}}{{.Long | trim}} +` + +var documentationTemplate = `// +/* +{{range .}}{{if .Short}}{{.Short | capitalize}} + +{{end}}{{if .Runnable}}Usage: + + {{AppName}} {{.UsageLine}} + +{{end}}{{.Long | trim}} + + +{{end}}*/ +package main +` + +// tmpl executes the given template text on data, writing the result to w. +func tmpl(w io.Writer, text string, data interface{}) { + t := template.New("top") + t.Funcs(template.FuncMap{"trim": strings.TrimSpace, "capitalize": capitalize}) + template.Must(t.Parse(text)) + if err := t.Execute(w, data); err != nil { + panic(err) + } +} + +func capitalize(s string) string { + if s == "" { + return s + } + r, n := utf8.DecodeRuneInString(s) + return string(unicode.ToTitle(r)) + s[n:] +} + +func printUsage(w io.Writer) { + if len(AppInfo) > 0 { + fmt.Fprintln(w, AppInfo) + } + tmpl(w, strings.Replace(usageTemplate, "{{AppName}}", AppName, -1), commands) +} + +func usage() { + printUsage(os.Stderr) + os.Exit(2) +} + +// help implements the 'help' command. +func help(args []string) bool { + if len(args) == 0 { + printUsage(os.Stdout) + // not exit 2: succeeded at 'go help'. + return true + } + if len(args) != 1 { + fmt.Fprintf(os.Stderr, "usage: %s help command\n\nToo many arguments given.\n", AppName) + return false + } + + arg := args[0] + + // 'go help documentation' generates doc.go. + if arg == "documentation" { + buf := new(bytes.Buffer) + printUsage(buf) + usage := &Command{Long: buf.String()} + tmpl(os.Stdout, strings.Replace(documentationTemplate, "{{AppName}}", AppName, -1), append([]*Command{usage}, commands...)) + return false + } + + for _, cmd := range commands { + if cmd.Name() == arg { + tmpl(os.Stdout, strings.Replace(helpTemplate, "{{AppName}}", AppName, -1), cmd) + // not exit 2: succeeded at 'go help cmd'. + return true + } + } + + fmt.Fprintf(os.Stderr, "Unknown help topic %#q. Run '%s help'.\n", arg, AppName) + //os.Exit(2) // failed at 'go help cmd' + return false +} + +var atexitFuncs []func() + +func Atexit(f func()) { + atexitFuncs = append(atexitFuncs, f) +} + +func Exit() { + for _, f := range atexitFuncs { + f() + } + os.Exit(exitStatus) +} + +func Fatalf(format string, args ...interface{}) { + Errorf(format, args...) + Exit() +} + +func Errorf(format string, args ...interface{}) { + log.Printf(format, args...) + SetExitStatus(1) +} + +var logf = log.Printf + +func ExitIfErrors() { + if exitStatus != 0 { + Exit() + } +} diff --git a/vendor/github.com/visualfc/gotools/command/version.go b/vendor/github.com/visualfc/gotools/command/version.go new file mode 100644 index 0000000..0a88780 --- /dev/null +++ b/vendor/github.com/visualfc/gotools/command/version.go @@ -0,0 +1,33 @@ +// Copyright 2011-2015 visualfc . All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package command + +import ( + "os" + "runtime" +) + +func init() { + Register(cmdVersion) +} + +var AppVersion string = "1.0" + +var cmdVersion = &Command{ + Run: runVersion, + UsageLine: "version", + Short: "print tool version", + Long: `Version prints the version.`, +} + +func runVersion(cmd *Command, args []string) error { + if len(args) != 0 { + cmd.PrintUsage() + return os.ErrInvalid + } + + cmd.Printf("%s version %s [%s %s/%s]\n", AppName, AppVersion, runtime.Version(), runtime.GOOS, runtime.GOARCH) + return nil +} diff --git a/vendor/github.com/visualfc/gotools/docview/dirtrees.go b/vendor/github.com/visualfc/gotools/docview/dirtrees.go new file mode 100644 index 0000000..2293e00 --- /dev/null +++ b/vendor/github.com/visualfc/gotools/docview/dirtrees.go @@ -0,0 +1,352 @@ +// Copyright 2010 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// This file contains the code dealing with package directory trees. + +package docview + +import ( + "bytes" + "go/doc" + "go/parser" + "go/token" + "log" + "os" + "path/filepath" + "strings" + "unicode" +) + +type Directory struct { + Depth int + Path string // includes Name + Name string + Text string // package documentation, if any + Dirs []*Directory // subdirectories +} + +//func isGoFile(fi os.FileInfo) bool { +// name := fi.Name() +// return !fi.IsDir() && +// len(name) > 0 && name[0] != '.' && // ignore .files +// filepath.Ext(name) == ".go" +//} + +func isGoFile(f os.FileInfo) bool { + // ignore non-Go files + name := f.Name() + return !f.IsDir() && !strings.HasPrefix(name, ".") && strings.HasSuffix(name, ".go") +} + +func isPkgFile(fi os.FileInfo) bool { + return isGoFile(fi) && + !strings.HasSuffix(fi.Name(), "_test.go") // ignore test files +} + +func isPkgDir(fi os.FileInfo) bool { + name := fi.Name() + return fi.IsDir() && len(name) > 0 && + name[0] != '_' && name[0] != '.' // ignore _files and .files +} + +func firstSentence(s string) string { + i := -1 // index+1 of first terminator (punctuation ending a sentence) + j := -1 // index+1 of first terminator followed by white space + prev := 'A' + for k, ch := range s { + k1 := k + 1 + if ch == '.' || ch == '!' || ch == '?' { + if i < 0 { + i = k1 // first terminator + } + if k1 < len(s) && s[k1] <= ' ' { + if j < 0 { + j = k1 // first terminator followed by white space + } + if !unicode.IsUpper(prev) { + j = k1 + break + } + } + } + prev = ch + } + + if j < 0 { + // use the next best terminator + j = i + if j < 0 { + // no terminator at all, use the entire string + j = len(s) + } + } + + return s[0:j] +} + +type treeBuilder struct { + pathFilter func(string) bool + maxDepth int +} + +func (b *treeBuilder) newDirTree(fset *token.FileSet, path, name string, depth int) *Directory { + if b.pathFilter != nil && !b.pathFilter(path) { + return nil + } + + if depth >= b.maxDepth { + // return a dummy directory so that the parent directory + // doesn't get discarded just because we reached the max + // directory depth + return &Directory{depth, path, name, "", nil} + } + + list, err := fs.ReadDir(path) + if err != nil { + // newDirTree is called with a path that should be a package + // directory; errors here should not happen, but if they do, + // we want to know about them + log.Printf("ReadDir(%s): %s", path, err) + } + + // determine number of subdirectories and if there are package files + ndirs := 0 + hasPkgFiles := false + var synopses [4]string // prioritized package documentation (0 == highest priority) + for _, d := range list { + switch { + case isPkgDir(d): + ndirs++ + case isPkgFile(d): + // looks like a package file, but may just be a file ending in ".go"; + // don't just count it yet (otherwise we may end up with hasPkgFiles even + // though the directory doesn't contain any real package files - was bug) + if synopses[0] == "" { + // no "optimal" package synopsis yet; continue to collect synopses + //file, err := parseFile(fset, filepath.Join(path, d.Name()), + //parser.ParseComments|parser.PackageClauseOnly) + file, err := parser.ParseFile(fset, filepath.Join(path, d.Name()), nil, + parser.ParseComments|parser.PackageClauseOnly) + + if err == nil { + hasPkgFiles = true + if file.Doc != nil { + // prioritize documentation + i := -1 + switch file.Name.Name { + case name: + i = 0 // normal case: directory name matches package name + case fakePkgName: + i = 1 // synopses for commands + case "main": + i = 2 // directory contains a main package + default: + i = 3 // none of the above + } + if 0 <= i && i < len(synopses) && synopses[i] == "" { + synopses[i] = doc.Synopsis(file.Doc.Text()) + } + } + } + } + } + } + + // create subdirectory tree + var dirs []*Directory + if ndirs > 0 { + dirs = make([]*Directory, ndirs) + i := 0 + for _, d := range list { + if isPkgDir(d) { + name := d.Name() + dd := b.newDirTree(fset, filepath.Join(path, name), name, depth+1) + if dd != nil { + dirs[i] = dd + i++ + } + } + } + dirs = dirs[0:i] + } + + // if there are no package files and no subdirectories + // containing package files, ignore the directory + if !hasPkgFiles && len(dirs) == 0 { + return nil + } + + // select the highest-priority synopsis for the directory entry, if any + synopsis := "" + for _, synopsis = range synopses { + if synopsis != "" { + break + } + } + + return &Directory{depth, path, name, synopsis, dirs} +} + +// newDirectory creates a new package directory tree with at most maxDepth +// levels, anchored at root. The result tree is pruned such that it only +// contains directories that contain package files or that contain +// subdirectories containing package files (transitively). If a non-nil +// pathFilter is provided, directory paths additionally must be accepted +// by the filter (i.e., pathFilter(path) must be true). If a value >= 0 is +// provided for maxDepth, nodes at larger depths are pruned as well; they +// are assumed to contain package files even if their contents are not known +// (i.e., in this case the tree may contain directories w/o any package files). +// +func newDirectory(root string, pathFilter func(string) bool, maxDepth int) *Directory { + // The root could be a symbolic link so use Stat not Lstat. + d, err := fs.Stat(root) + // If we fail here, report detailed error messages; otherwise + // is is hard to see why a directory tree was not built. + switch { + case err != nil: + log.Printf("newDirectory(%s): %s", root, err) + return nil + case !isPkgDir(d): + log.Printf("newDirectory(%s): not a package directory", root) + return nil + } + if maxDepth < 0 { + maxDepth = 1e6 // "infinity" + } + b := treeBuilder{pathFilter, maxDepth} + // the file set provided is only for local parsing, no position + // information escapes and thus we don't need to save the set + return b.newDirTree(token.NewFileSet(), root, d.Name(), 0) +} + +func (dir *Directory) writeLeafs(buf *bytes.Buffer) { + if dir != nil { + if len(dir.Dirs) == 0 { + buf.WriteString(dir.Path) + buf.WriteByte('\n') + return + } + + for _, d := range dir.Dirs { + d.writeLeafs(buf) + } + } +} + +func (dir *Directory) walk(c chan<- *Directory, skipRoot bool) { + if dir != nil { + if !skipRoot { + c <- dir + } + for _, d := range dir.Dirs { + d.walk(c, false) + } + } +} + +func (dir *Directory) iter(skipRoot bool) <-chan *Directory { + c := make(chan *Directory) + go func() { + dir.walk(c, skipRoot) + close(c) + }() + return c +} + +func (dir *Directory) lookupLocal(name string) *Directory { + for _, d := range dir.Dirs { + if d.Name == name { + return d + } + } + return nil +} + +// lookup looks for the *Directory for a given path, relative to dir. +func (dir *Directory) lookup(path string) *Directory { + d := strings.Split(dir.Path, string(filepath.Separator)) + p := strings.Split(path, string(filepath.Separator)) + i := 0 + for i < len(d) { + if i >= len(p) || d[i] != p[i] { + return nil + } + i++ + } + for dir != nil && i < len(p) { + dir = dir.lookupLocal(p[i]) + i++ + } + return dir +} + +// DirEntry describes a directory entry. The Depth and Height values +// are useful for presenting an entry in an indented fashion. +// +type DirEntry struct { + Depth int // >= 0 + Height int // = DirList.MaxHeight - Depth, > 0 + Path string // includes Name, relative to DirList root + Name string + Synopsis string +} + +type DirList struct { + MaxHeight int // directory tree height, > 0 + List []DirEntry +} + +// listing creates a (linear) directory listing from a directory tree. +// If skipRoot is set, the root directory itself is excluded from the list. +// +func (root *Directory) listing(skipRoot bool) *DirList { + if root == nil { + return nil + } + + // determine number of entries n and maximum height + n := 0 + minDepth := 1 << 30 // infinity + maxDepth := 0 + for d := range root.iter(skipRoot) { + n++ + if minDepth > d.Depth { + minDepth = d.Depth + } + if maxDepth < d.Depth { + maxDepth = d.Depth + } + } + maxHeight := maxDepth - minDepth + 1 + + if n == 0 { + return nil + } + + // create list + list := make([]DirEntry, n) + i := 0 + for d := range root.iter(skipRoot) { + p := &list[i] + p.Depth = d.Depth - minDepth + p.Height = maxHeight - p.Depth + // the path is relative to root.Path - remove the root.Path + // prefix (the prefix should always be present but avoid + // crashes and check) + path := d.Path + if strings.HasPrefix(d.Path, root.Path) { + path = d.Path[len(root.Path):] + } + // remove trailing separator if any - path must be relative + if len(path) > 0 && path[0] == filepath.Separator { + path = path[1:] + } + p.Path = filepath.ToSlash(path) + p.Name = d.Name + p.Synopsis = d.Text + i++ + } + + return &DirList{maxHeight, list} +} diff --git a/vendor/github.com/visualfc/gotools/docview/docview.go b/vendor/github.com/visualfc/gotools/docview/docview.go new file mode 100644 index 0000000..85d96b6 --- /dev/null +++ b/vendor/github.com/visualfc/gotools/docview/docview.go @@ -0,0 +1,407 @@ +// Copyright 2011-2015 visualfc . All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package docview + +import ( + "bytes" + "fmt" + "go/build" + "io" + "log" + "os" + "path/filepath" + "runtime" + "strconv" + "strings" + "text/template" + "time" + + "github.com/visualfc/gotools/command" +) + +var Command = &command.Command{ + Run: runDocView, + UsageLine: "docview [-mode] [-list|-find]", + Short: "golang docview util", + Long: `golang docview util`, +} + +var goroot = runtime.GOROOT() + +var docViewFind string +var docViewList string +var docViewMode string + +func init() { + Command.Flag.StringVar(&docViewFind, "find", "", "find package list, :pkg flag is best match") + Command.Flag.StringVar(&docViewList, "list", "", "Print go packages list [pkg|cmd]") + Command.Flag.StringVar(&docViewMode, "mode", "text", "Print mode [text|html|lite]") +} + +func runDocView(cmd *command.Command, args []string) error { + if docViewFind == "" && docViewList == "" { + cmd.Usage() + return os.ErrInvalid + } + + var template string + var info *Info + if len(docViewList) > 0 { + pkgPath := filepath.Join(goroot, "src", docViewList) + if docViewList == "pkg" { + _, err := os.Stat(pkgPath) + if err != nil { + pkgPath = filepath.Join(goroot, "src") + } + } + info = NewListInfo(pkgPath) + if info != nil { + if docViewList == "pkg" { + var filterList []DirEntry + for _, v := range info.Dirs.List { + if v.Path == "cmd" { + continue + } + if strings.HasPrefix(v.Path, "cmd/") { + continue + } + if strings.Contains(v.Path, "/testdata") { + continue + } + filterList = append(filterList, v) + } + info.Dirs.List = filterList + } else if docViewList == "cmd" { + var filterList []DirEntry + for _, v := range info.Dirs.List { + if strings.Contains(v.Path, "/") { + continue + } + if strings.Contains(v.Path, "internal") { + continue + } + filterList = append(filterList, v) + } + info.Dirs.List = filterList + } + } + switch docViewMode { + case "html": + template = listHTML + case "lite": + template = listLite + case "text": + template = listText + default: + template = listText + } + } else if len(docViewFind) > 0 { + dir := NewSourceDir(goroot) + info = dir.FindInfo(docViewFind) + switch docViewMode { + case "html": + template = findHTML + case "lite": + template = findLite + case "text": + template = findText + default: + template = findText + } + } + if info == nil { + fmt.Fprintf(os.Stderr, "\n") + command.SetExitStatus(3) + command.Exit() + } + contents := info.GetPkgList(docViewMode, template) + fmt.Fprintf(os.Stdout, "%s", contents) + return nil +} + +var ( + fs FileSystem = OS // the underlying file system +) + +// Fake package file and name for commands. Contains the command documentation. +const fakePkgFile = "doc.go" +const fakePkgName = "documentation" + +func textFmt(w io.Writer, format string, x ...interface{}) { + var buf bytes.Buffer + fmt.Fprint(&buf, x) + template.HTMLEscape(w, buf.Bytes()) +} + +func pathEscFmt(w io.Writer, format string, x ...interface{}) { + switch v := x[0].(type) { + case []byte: + template.HTMLEscape(w, v) + case string: + template.HTMLEscape(w, []byte(filepath.ToSlash(v))) + default: + var buf bytes.Buffer + fmt.Fprint(&buf, x) + template.HTMLEscape(w, buf.Bytes()) + } +} + +func htmlEscFmt(w io.Writer, format string, x ...interface{}) { + switch v := x[0].(type) { + case int: + template.HTMLEscape(w, []byte(strconv.Itoa(v))) + case []byte: + template.HTMLEscape(w, v) + case string: + template.HTMLEscape(w, []byte(v)) + default: + var buf bytes.Buffer + fmt.Fprint(&buf, x) + template.HTMLEscape(w, buf.Bytes()) + } +} + +// Template formatter for "padding" format. +func paddingFmt(w io.Writer, format string, x ...interface{}) { + for i := x[0].(int); i > 0; i-- { + fmt.Fprint(w, ``) + } +} + +// Template formatter for "time" format. +func timeFmt(w io.Writer, format string, x ...interface{}) { + template.HTMLEscape(w, []byte(time.Unix(x[0].(int64)/1e9, 0).String())) +} + +var fmap = template.FuncMap{ + "repeat": strings.Repeat, +} + +func readTemplateData(name, data string) *template.Template { + return template.Must(template.New(name).Funcs(fmap).Parse(data)) +} + +func readTemplateFile(name, path string) *template.Template { + return template.Must(template.New(name).Funcs(fmap).ParseFiles(path)) +} + +func applyTemplate(t *template.Template, name string, data interface{}) []byte { + var buf bytes.Buffer + if err := t.Execute(&buf, data); err != nil { + log.Printf("%s.Execute: %s", name, err) + } + return buf.Bytes() +} + +type Info struct { + Find string + Best *DirEntry + Dirs *DirList +} + +type GodocDir struct { + pkg *Directory + cmd *Directory + gopath []*Directory +} + +func NewSourceDir(goroot string) *GodocDir { + pkgPath := filepath.Join(goroot, "src/pkg") + _, err := os.Stat(pkgPath) + var cmd *Directory + if err != nil { + pkgPath = filepath.Join(goroot, "src") + } else { + cmd = newDirectory(filepath.Join(goroot, "src", "cmd"), nil, -1) + } + pkg := newDirectory(pkgPath, nil, -1) + ctx := build.Default + ctx.GOROOT = "" + var gopath []*Directory + for _, v := range ctx.SrcDirs() { + gopath = append(gopath, newDirectory(v, nil, -1)) + } + return &GodocDir{pkg, cmd, gopath} +} + +func (dir *GodocDir) FindInfo(name string) *Info { + max1, best1, list1 := FindDir(dir.pkg, name) + max2, best2, list2 := FindDir(dir.cmd, name) + var maxHeight int + if max1 >= max2 { + maxHeight = max1 + } else { + maxHeight = max2 + } + var best *DirEntry + if best1 != nil { + best = best1 + if best2 != nil { + list2 = append(list2, *best2) + } + } else { + best = best2 + } + var list []DirEntry + list = append(list, list1...) + list = append(list, list2...) + for _, v := range dir.gopath { + max3, best3, list3 := FindDir(v, name) + if max3 > maxHeight { + maxHeight = max3 + } + if best == nil { + best = best3 + } + list = append(list, list3...) + } + return &Info{name, best, &DirList{maxHeight, list}} +} + +func FindDir(dir *Directory, pkgname string) (maxHeight int, best *DirEntry, list []DirEntry) { + if dir == nil { + return + } + dirList := dir.listing(true) + max := len(dirList.List) + maxHeight = dirList.MaxHeight + + for i := 0; i < max; i++ { + name := dirList.List[i].Name + path := filepath.ToSlash(dirList.List[i].Path) + if name == pkgname || path == pkgname { + best = &dirList.List[i] + } else if strings.Contains(path, pkgname) { + list = append(list, dirList.List[i]) + } + } + return +} + +func appendList(list1, list2 []DirEntry) []DirEntry { + list := list1 + max := len(list2) + for i := 0; i < max; i++ { + list = append(list, list2[i]) + } + return list +} + +func NewListInfo(root string) *Info { + dir := newDirectory(root, nil, -1) + if dir == nil { + return nil + } + return &Info{"", nil, dir.listing(true)} +} + +func FindPkgInfo(root string, pkgname string) *Info { + dir := newDirectory(root, nil, -1) + if dir == nil { + return nil + } + dirList := dir.listing(true) + if pkgname == "*" { + return &Info{pkgname, nil, dirList} + } + var best DirEntry + var list []DirEntry + max := len(dirList.List) + for i := 0; i < max; i++ { + name := dirList.List[i].Name + path := filepath.ToSlash(dirList.List[i].Path) + if name == pkgname || path == pkgname { + best = dirList.List[i] + } else if strings.Contains(path, pkgname) { + list = append(list, dirList.List[i]) + } + } + return &Info{pkgname, &best, &DirList{dirList.MaxHeight, list}} +} + +func (info *Info) GetPkgList(name, templateData string) []byte { + data := readTemplateData(name, templateData) + return applyTemplate(data, "pkglist", info) +} + +var listHTML = ` +

+Need more packages? The +Package Dashboard +provides a list of goinstallable packages. +

+

Subdirectories

+

+{{with .Dirs}} +

+ + + + + + + {{range .List}} + + {{repeat "" .Depth}} + + + + + {{end}} +
Name Synopsis
{{html .Name}}{{html .Synopsis}}
+

+{{end}}` + +var listText = `$list +{{with .Dirs}} +{{range .List}}{{.Path }} +{{end}} +{{end}}` + +var listLite = `$list{{with .Dirs}}{{range .List}},{{.Path}}{{end}}{{end}}` + +var findHTML = ` +

+Need more packages? The +Package Dashboard +provides a list of goinstallable packages. +

+

Subdirectories

+ + + + + + {{with .Best}} + + + + + + {{end}} + {{with .Dirs}} + + + + + + {{range .List}} + + + + + + {{end}} +
Best Synopsis
{{.Path}}{{html .Synopsis}}
Match Synopsis
{{.Path}}{{html .Synopsis}}
+

+{{end}}` + +var findText = `$best +{{with .Best}}{{.Path}}{{end}} +$list +{{with .Dirs}}{{range .List}}{{.Path}} +{{end}}{{end}}` + +var findLite = `$find,{{with .Best}}{{.Path}}{{end}}{{with .Dirs}}{{range .List}},{{.Path}}{{end}}{{end}}` diff --git a/vendor/github.com/visualfc/gotools/docview/docx.go b/vendor/github.com/visualfc/gotools/docview/docx.go new file mode 100644 index 0000000..01a9355 --- /dev/null +++ b/vendor/github.com/visualfc/gotools/docview/docx.go @@ -0,0 +1,668 @@ +// Copyright 2009 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package doc extracts source code documentation from a Go AST. +package docview + +import ( + "go/ast" + "go/token" + "regexp" + "sort" + "strconv" +) + +// ---------------------------------------------------------------------------- + +type typeDoc struct { + // len(decl.Specs) == 1, and the element type is *ast.TypeSpec + // if the type declaration hasn't been seen yet, decl is nil + decl *ast.GenDecl + // values, factory functions, and methods associated with the type + values []*ast.GenDecl // consts and vars + factories map[string]*ast.FuncDecl + methods map[string]*ast.FuncDecl +} + +// docReader accumulates documentation for a single package. +// It modifies the AST: Comments (declaration documentation) +// that have been collected by the DocReader are set to nil +// in the respective AST nodes so that they are not printed +// twice (once when printing the documentation and once when +// printing the corresponding AST node). +// +type docReader struct { + doc *ast.CommentGroup // package documentation, if any + pkgName string + showAll bool + values []*ast.GenDecl // consts and vars + types map[string]*typeDoc + funcs map[string]*ast.FuncDecl + imports map[string]int + bugs []*ast.CommentGroup +} + +func (doc *docReader) init(pkgName string, showAll bool) { + doc.pkgName = pkgName + doc.showAll = showAll + doc.imports = make(map[string]int) + doc.types = make(map[string]*typeDoc) + doc.funcs = make(map[string]*ast.FuncDecl) +} + +func (doc *docReader) addDoc(comments *ast.CommentGroup) { + if doc.doc == nil { + // common case: just one package comment + doc.doc = comments + return + } + + // More than one package comment: Usually there will be only + // one file with a package comment, but it's better to collect + // all comments than drop them on the floor. + // (This code isn't particularly clever - no amortized doubling is + // used - but this situation occurs rarely and is not time-critical.) + n1 := len(doc.doc.List) + n2 := len(comments.List) + list := make([]*ast.Comment, n1+1+n2) // + 1 for separator line + copy(list, doc.doc.List) + list[n1] = &ast.Comment{token.NoPos, "//"} // separator line + copy(list[n1+1:], comments.List) + doc.doc = &ast.CommentGroup{list} +} + +func (doc *docReader) addType(decl *ast.GenDecl) { + spec := decl.Specs[0].(*ast.TypeSpec) + typ := doc.lookupTypeDoc(spec.Name.Name) + // typ should always be != nil since declared types + // are always named - be conservative and check + if typ != nil { + // a type should be added at most once, so typ.decl + // should be nil - if it isn't, simply overwrite it + typ.decl = decl + } +} + +func (doc *docReader) lookupTypeDoc(name string) *typeDoc { + if name == "" { + return nil // no type docs for anonymous types + } + if tdoc, found := doc.types[name]; found { + return tdoc + } + // type wasn't found - add one without declaration + tdoc := &typeDoc{nil, nil, make(map[string]*ast.FuncDecl), make(map[string]*ast.FuncDecl)} + doc.types[name] = tdoc + return tdoc +} + +func docBaseTypeName(typ ast.Expr, showAll bool) string { + switch t := typ.(type) { + case *ast.Ident: + // if the type is not exported, the effect to + // a client is as if there were no type name + if showAll || t.IsExported() { + return t.Name + } + case *ast.StarExpr: + return docBaseTypeName(t.X, showAll) + } + return "" +} + +func (doc *docReader) addValue(decl *ast.GenDecl) { + // determine if decl should be associated with a type + // Heuristic: For each typed entry, determine the type name, if any. + // If there is exactly one type name that is sufficiently + // frequent, associate the decl with the respective type. + domName := "" + domFreq := 0 + prev := "" + for _, s := range decl.Specs { + if v, ok := s.(*ast.ValueSpec); ok { + name := "" + switch { + case v.Type != nil: + // a type is present; determine its name + name = docBaseTypeName(v.Type, doc.showAll) + case decl.Tok == token.CONST: + // no type is present but we have a constant declaration; + // use the previous type name (w/o more type information + // we cannot handle the case of unnamed variables with + // initializer expressions except for some trivial cases) + name = prev + } + if name != "" { + // entry has a named type + if domName != "" && domName != name { + // more than one type name - do not associate + // with any type + domName = "" + break + } + domName = name + domFreq++ + } + prev = name + } + } + + // determine values list + const threshold = 0.75 + values := &doc.values + if domName != "" && domFreq >= int(float64(len(decl.Specs))*threshold) { + // typed entries are sufficiently frequent + typ := doc.lookupTypeDoc(domName) + if typ != nil { + values = &typ.values // associate with that type + } + } + + *values = append(*values, decl) +} + +// Helper function to set the table entry for function f. Makes sure that +// at least one f with associated documentation is stored in table, if there +// are multiple f's with the same name. +func setFunc(table map[string]*ast.FuncDecl, f *ast.FuncDecl) { + name := f.Name.Name + if g, exists := table[name]; exists && g.Doc != nil { + // a function with the same name has already been registered; + // since it has documentation, assume f is simply another + // implementation and ignore it + // TODO(gri) consider collecting all functions, or at least + // all comments + return + } + // function doesn't exist or has no documentation; use f + table[name] = f +} + +func (doc *docReader) addFunc(fun *ast.FuncDecl) { + name := fun.Name.Name + + // determine if it should be associated with a type + if fun.Recv != nil { + // method + typ := doc.lookupTypeDoc(docBaseTypeName(fun.Recv.List[0].Type, doc.showAll)) + if typ != nil { + // exported receiver type + setFunc(typ.methods, fun) + } + // otherwise don't show the method + // TODO(gri): There may be exported methods of non-exported types + // that can be called because of exported values (consts, vars, or + // function results) of that type. Could determine if that is the + // case and then show those methods in an appropriate section. + return + } + + // perhaps a factory function + // determine result type, if any + if fun.Type.Results.NumFields() >= 1 { + res := fun.Type.Results.List[0] + if len(res.Names) <= 1 { + // exactly one (named or anonymous) result associated + // with the first type in result signature (there may + // be more than one result) + tname := docBaseTypeName(res.Type, doc.showAll) + typ := doc.lookupTypeDoc(tname) + if typ != nil { + // named and exported result type + + // Work-around for failure of heuristic: In package os + // too many functions are considered factory functions + // for the Error type. Eliminate manually for now as + // this appears to be the only important case in the + // current library where the heuristic fails. + if doc.pkgName == "os" && tname == "Error" && + name != "NewError" && name != "NewSyscallError" { + // not a factory function for os.Error + setFunc(doc.funcs, fun) // treat as ordinary function + return + } + + setFunc(typ.factories, fun) + return + } + } + } + + // ordinary function + setFunc(doc.funcs, fun) +} + +func (doc *docReader) addDecl(decl ast.Decl) { + switch d := decl.(type) { + case *ast.GenDecl: + if len(d.Specs) > 0 { + switch d.Tok { + case token.IMPORT: + // imports are handled individually + for _, spec := range d.Specs { + if s, ok := spec.(*ast.ImportSpec); ok { + if import_, err := strconv.Unquote(s.Path.Value); err == nil { + doc.imports[import_] = 1 + } + } + } + case token.CONST, token.VAR: + // constants and variables are always handled as a group + doc.addValue(d) + case token.TYPE: + // types are handled individually + for _, spec := range d.Specs { + // make a (fake) GenDecl node for this TypeSpec + // (we need to do this here - as opposed to just + // for printing - so we don't lose the GenDecl + // documentation) + // + // TODO(gri): Consider just collecting the TypeSpec + // node (and copy in the GenDecl.doc if there is no + // doc in the TypeSpec - this is currently done in + // makeTypeDocs below). Simpler data structures, but + // would lose GenDecl documentation if the TypeSpec + // has documentation as well. + doc.addType(&ast.GenDecl{d.Doc, d.Pos(), token.TYPE, token.NoPos, []ast.Spec{spec}, token.NoPos}) + // A new GenDecl node is created, no need to nil out d.Doc. + } + } + } + case *ast.FuncDecl: + doc.addFunc(d) + } +} + +func copyCommentList(list []*ast.Comment) []*ast.Comment { + return append([]*ast.Comment(nil), list...) +} + +var ( + bug_markers = regexp.MustCompile("^/[/*][ \t]*BUG\\(.*\\):[ \t]*") // BUG(uid): + bug_content = regexp.MustCompile("[^ \n\r\t]+") // at least one non-whitespace char +) + +// addFile adds the AST for a source file to the docReader. +// Adding the same AST multiple times is a no-op. +// +func (doc *docReader) addFile(src *ast.File) { + // add package documentation + if src.Doc != nil { + doc.addDoc(src.Doc) + src.Doc = nil // doc consumed - remove from ast.File node + } + + // add all declarations + for _, decl := range src.Decls { + doc.addDecl(decl) + } + + // collect BUG(...) comments + for _, c := range src.Comments { + text := c.List[0].Text + if m := bug_markers.FindStringIndex(text); m != nil { + // found a BUG comment; maybe empty + if btxt := text[m[1]:]; bug_content.MatchString(btxt) { + // non-empty BUG comment; collect comment without BUG prefix + list := copyCommentList(c.List) + list[0].Text = text[m[1]:] + doc.bugs = append(doc.bugs, &ast.CommentGroup{list}) + } + } + } + src.Comments = nil // consumed unassociated comments - remove from ast.File node +} + +func NewFileDoc(file *ast.File, showAll bool) *PackageDoc { + var r docReader + r.init(file.Name.Name, showAll) + r.addFile(file) + return r.newDoc("", nil) +} + +func NewPackageDoc(pkg *ast.Package, importpath string, showAll bool) *PackageDoc { + var r docReader + r.init(pkg.Name, showAll) + filenames := make([]string, len(pkg.Files)) + i := 0 + for filename, f := range pkg.Files { + r.addFile(f) + filenames[i] = filename + i++ + } + return r.newDoc(importpath, filenames) +} + +// ---------------------------------------------------------------------------- +// Conversion to external representation + +// ValueDoc is the documentation for a group of declared +// values, either vars or consts. +// +type ValueDoc struct { + Doc string + Decl *ast.GenDecl + order int +} + +type sortValueDoc []*ValueDoc + +func (p sortValueDoc) Len() int { return len(p) } +func (p sortValueDoc) Swap(i, j int) { p[i], p[j] = p[j], p[i] } + +func declName(d *ast.GenDecl) string { + if len(d.Specs) != 1 { + return "" + } + + switch v := d.Specs[0].(type) { + case *ast.ValueSpec: + return v.Names[0].Name + case *ast.TypeSpec: + return v.Name.Name + } + + return "" +} + +func (p sortValueDoc) Less(i, j int) bool { + // sort by name + // pull blocks (name = "") up to top + // in original order + if ni, nj := declName(p[i].Decl), declName(p[j].Decl); ni != nj { + return ni < nj + } + return p[i].order < p[j].order +} + +func makeValueDocs(list []*ast.GenDecl, tok token.Token) []*ValueDoc { + d := make([]*ValueDoc, len(list)) // big enough in any case + n := 0 + for i, decl := range list { + if decl.Tok == tok { + d[n] = &ValueDoc{decl.Doc.Text(), decl, i} + n++ + decl.Doc = nil // doc consumed - removed from AST + } + } + d = d[0:n] + sort.Sort(sortValueDoc(d)) + return d +} + +// FuncDoc is the documentation for a func declaration, +// either a top-level function or a method function. +// +type FuncDoc struct { + Doc string + Recv ast.Expr // TODO(rsc): Would like string here + Name string + Decl *ast.FuncDecl +} + +type sortFuncDoc []*FuncDoc + +func (p sortFuncDoc) Len() int { return len(p) } +func (p sortFuncDoc) Swap(i, j int) { p[i], p[j] = p[j], p[i] } +func (p sortFuncDoc) Less(i, j int) bool { return p[i].Name < p[j].Name } + +func makeFuncDocs(m map[string]*ast.FuncDecl) []*FuncDoc { + d := make([]*FuncDoc, len(m)) + i := 0 + for _, f := range m { + doc := new(FuncDoc) + doc.Doc = f.Doc.Text() + f.Doc = nil // doc consumed - remove from ast.FuncDecl node + if f.Recv != nil { + doc.Recv = f.Recv.List[0].Type + } + doc.Name = f.Name.Name + doc.Decl = f + d[i] = doc + i++ + } + sort.Sort(sortFuncDoc(d)) + return d +} + +// TypeDoc is the documentation for a declared type. +// Consts and Vars are sorted lists of constants and variables of (mostly) that type. +// Factories is a sorted list of factory functions that return that type. +// Methods is a sorted list of method functions on that type. +type TypeDoc struct { + Doc string + Type *ast.TypeSpec + Consts []*ValueDoc + Vars []*ValueDoc + Funcs []*FuncDoc + Methods []*FuncDoc + Decl *ast.GenDecl + order int +} + +type sortTypeDoc []*TypeDoc + +func (p sortTypeDoc) Len() int { return len(p) } +func (p sortTypeDoc) Swap(i, j int) { p[i], p[j] = p[j], p[i] } +func (p sortTypeDoc) Less(i, j int) bool { + // sort by name + // pull blocks (name = "") up to top + // in original order + if ni, nj := p[i].Type.Name.Name, p[j].Type.Name.Name; ni != nj { + return ni < nj + } + return p[i].order < p[j].order +} + +// NOTE(rsc): This would appear not to be correct for type ( ) +// blocks, but the doc extractor above has split them into +// individual declarations. +func (doc *docReader) makeTypeDocs(m map[string]*typeDoc) []*TypeDoc { + d := make([]*TypeDoc, len(m)) + i := 0 + for _, old := range m { + // all typeDocs should have a declaration associated with + // them after processing an entire package - be conservative + // and check + if decl := old.decl; decl != nil { + typespec := decl.Specs[0].(*ast.TypeSpec) + t := new(TypeDoc) + doc := typespec.Doc + typespec.Doc = nil // doc consumed - remove from ast.TypeSpec node + if doc == nil { + // no doc associated with the spec, use the declaration doc, if any + doc = decl.Doc + } + decl.Doc = nil // doc consumed - remove from ast.Decl node + t.Doc = doc.Text() + t.Type = typespec + t.Consts = makeValueDocs(old.values, token.CONST) + t.Vars = makeValueDocs(old.values, token.VAR) + t.Funcs = makeFuncDocs(old.factories) + t.Methods = makeFuncDocs(old.methods) + t.Decl = old.decl + t.order = i + d[i] = t + i++ + } else { + // no corresponding type declaration found - move any associated + // values, factory functions, and methods back to the top-level + // so that they are not lost (this should only happen if a package + // file containing the explicit type declaration is missing or if + // an unqualified type name was used after a "." import) + // 1) move values + doc.values = append(doc.values, old.values...) + // 2) move factory functions + for name, f := range old.factories { + doc.funcs[name] = f + } + // 3) move methods + for name, f := range old.methods { + // don't overwrite functions with the same name + if _, found := doc.funcs[name]; !found { + doc.funcs[name] = f + } + } + } + } + d = d[0:i] // some types may have been ignored + sort.Sort(sortTypeDoc(d)) + return d +} + +func makeBugDocs(list []*ast.CommentGroup) []string { + d := make([]string, len(list)) + for i, g := range list { + d[i] = g.Text() + } + return d +} + +// PackageDoc is the documentation for an entire package. +// +type PackageDoc struct { + PackageName string + ImportPath string + Imports []string + Filenames []string + Doc string + Consts []*ValueDoc + Types []*TypeDoc + Vars []*ValueDoc + Funcs []*FuncDoc + Bugs []string +} + +// newDoc returns the accumulated documentation for the package. +// +func (doc *docReader) newDoc(importpath string, filenames []string) *PackageDoc { + p := new(PackageDoc) + p.PackageName = doc.pkgName + p.ImportPath = importpath + sort.Strings(filenames) + p.Filenames = filenames + p.Doc = doc.doc.Text() + p.Imports = sortedKeys(doc.imports) + // makeTypeDocs may extend the list of doc.values and + // doc.funcs and thus must be called before any other + // function consuming those lists + p.Types = doc.makeTypeDocs(doc.types) + p.Consts = makeValueDocs(doc.values, token.CONST) + p.Vars = makeValueDocs(doc.values, token.VAR) + p.Funcs = makeFuncDocs(doc.funcs) + p.Bugs = makeBugDocs(doc.bugs) + return p +} + +func sortedKeys(m map[string]int) []string { + list := make([]string, len(m)) + i := 0 + for key := range m { + list[i] = key + i++ + } + sort.Strings(list) + return list +} + +// ---------------------------------------------------------------------------- +// Filtering by name + +type Filter func(string) bool + +func matchFields(fields *ast.FieldList, f Filter) bool { + if fields != nil { + for _, field := range fields.List { + for _, name := range field.Names { + if f(name.Name) { + return true + } + } + } + } + return false +} + +func matchDecl(d *ast.GenDecl, f Filter) bool { + for _, d := range d.Specs { + switch v := d.(type) { + case *ast.ValueSpec: + for _, name := range v.Names { + if f(name.Name) { + return true + } + } + case *ast.TypeSpec: + if f(v.Name.Name) { + return true + } + switch t := v.Type.(type) { + case *ast.StructType: + if matchFields(t.Fields, f) { + return true + } + case *ast.InterfaceType: + if matchFields(t.Methods, f) { + return true + } + } + } + } + return false +} + +func filterValueDocs(a []*ValueDoc, f Filter) []*ValueDoc { + w := 0 + for _, vd := range a { + if matchDecl(vd.Decl, f) { + a[w] = vd + w++ + } + } + return a[0:w] +} + +func filterFuncDocs(a []*FuncDoc, f Filter) []*FuncDoc { + w := 0 + for _, fd := range a { + if f(fd.Name) { + a[w] = fd + w++ + } + } + return a[0:w] +} + +func filterTypeDocs(a []*TypeDoc, f Filter) []*TypeDoc { + w := 0 + for _, td := range a { + n := 0 // number of matches + if matchDecl(td.Decl, f) { + n = 1 + } else { + // type name doesn't match, but we may have matching consts, vars, factories or methods + td.Consts = filterValueDocs(td.Consts, f) + td.Vars = filterValueDocs(td.Vars, f) + td.Funcs = filterFuncDocs(td.Funcs, f) + td.Methods = filterFuncDocs(td.Methods, f) + n += len(td.Consts) + len(td.Vars) + len(td.Funcs) + len(td.Methods) + } + if n > 0 { + a[w] = td + w++ + } + } + return a[0:w] +} + +// Filter eliminates documentation for names that don't pass through the filter f. +// TODO: Recognize "Type.Method" as a name. +// +func (p *PackageDoc) Filter(f Filter) { + p.Consts = filterValueDocs(p.Consts, f) + p.Vars = filterValueDocs(p.Vars, f) + p.Types = filterTypeDocs(p.Types, f) + p.Funcs = filterFuncDocs(p.Funcs, f) + p.Doc = "" // don't show top-level package doc +} diff --git a/vendor/github.com/visualfc/gotools/docview/filesystem.go b/vendor/github.com/visualfc/gotools/docview/filesystem.go new file mode 100644 index 0000000..dc60649 --- /dev/null +++ b/vendor/github.com/visualfc/gotools/docview/filesystem.go @@ -0,0 +1,70 @@ +// Copyright 2011 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// This file defines types for abstract file system access and +// provides an implementation accessing the file system of the +// underlying OS. + +package docview + +import ( + "fmt" + "io" + "io/ioutil" + "os" +) + +// The FileSystem interface specifies the methods godoc is using +// to access the file system for which it serves documentation. +type FileSystem interface { + Open(path string) (io.ReadCloser, error) + Lstat(path string) (os.FileInfo, error) + Stat(path string) (os.FileInfo, error) + ReadDir(path string) ([]os.FileInfo, error) +} + +// ReadFile reads the file named by path from fs and returns the contents. +func ReadFile(fs FileSystem, path string) ([]byte, error) { + rc, err := fs.Open(path) + if err != nil { + return nil, err + } + defer rc.Close() + return ioutil.ReadAll(rc) +} + +// ---------------------------------------------------------------------------- +// OS-specific FileSystem implementation + +var OS FileSystem = osFS{} + +// osFS is the OS-specific implementation of FileSystem +type osFS struct{} + +func (osFS) Open(path string) (io.ReadCloser, error) { + f, err := os.Open(path) + if err != nil { + return nil, err + } + fi, err := f.Stat() + if err != nil { + return nil, err + } + if fi.IsDir() { + return nil, fmt.Errorf("Open: %s is a directory", path) + } + return f, nil +} + +func (osFS) Lstat(path string) (os.FileInfo, error) { + return os.Lstat(path) +} + +func (osFS) Stat(path string) (os.FileInfo, error) { + return os.Stat(path) +} + +func (osFS) ReadDir(path string) ([]os.FileInfo, error) { + return ioutil.ReadDir(path) // is sorted +} diff --git a/vendor/github.com/visualfc/gotools/finddoc/finddoc.go b/vendor/github.com/visualfc/gotools/finddoc/finddoc.go new file mode 100644 index 0000000..dfe2b75 --- /dev/null +++ b/vendor/github.com/visualfc/gotools/finddoc/finddoc.go @@ -0,0 +1,609 @@ +// Copyright 2013 The rspace Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Doc is a simple document printer that produces the doc comments for its +// argument symbols, plus a link to the full documentation and a pointer to +// the source. It has a more Go-like UI than godoc. It can also search for +// symbols by looking in all packages, and case is ignored. For instance: +// doc isupper +// will find unicode.IsUpper. +// +// The -pkg flag retrieves package-level doc comments only. +// +// Usage: +// doc pkg.name # "doc io.Writer" +// doc pkg name # "doc fmt Printf" +// doc name # "doc isupper" (finds unicode.IsUpper) +// doc -pkg pkg # "doc fmt" +// +// The pkg is the last element of the package path; +// no slashes (ast.Node not go/ast.Node). +// +// Flags +// -c(onst) -f(unc) -i(nterface) -m(ethod) -s(truct) -t(ype) -v(ar) +// restrict hits to declarations of the corresponding kind. +// Flags +// -doc -src -url +// restrict printing to the documentation, source path, or godoc URL. +package finddoc + +import ( + "bytes" + "fmt" + "go/ast" + "go/parser" + "go/printer" + "go/token" + "os" + "path" + "path/filepath" + "regexp" + "runtime" + "strings" + + "github.com/visualfc/gotools/command" + _ "golang.org/x/tools/go/gcimporter" + "golang.org/x/tools/go/types" +) + +const usageDoc = `Find documentation for names. +usage: + doc pkg.name # "doc io.Writer" + doc pkg name # "doc fmt Printf" + doc name # "doc isupper" finds unicode.IsUpper + doc -pkg pkg # "doc fmt" + doc -r expr # "doc -r '.*exported'" +pkg is the last component of any package, e.g. fmt, parser +name is the name of an exported symbol; case is ignored in matches. + +The name may also be a regular expression to select which names +to match. In regular expression searches, case is ignored and +the pattern must match the entire name, so ".?print" will match +Print, Fprint and Sprint but not Fprintf. + +Flags + -c(onst) -f(unc) -i(nterface) -m(ethod) -s(truct) -t(ype) -v(ar) +restrict hits to declarations of the corresponding kind. +Flags + -doc -src -url +restrict printing to the documentation, source path, or godoc URL. +Flag + -r +takes a single argument (no package), a name or regular expression +to search for in all packages. +` + +var Command = &command.Command{ + Run: runDoc, + UsageLine: "finddoc [pkg.name|pkg name|-pkg name]", + Short: "golang doc lookup", + Long: usageDoc, +} + +var ( + // If none is set, all are set. + docFlag bool + srcFlag bool + urlFlag bool + regexpFlag bool + matchWordFlag bool + matchCaseFlag bool + constantFlag bool + functionFlag bool + interfaceFlag bool + methodFlag bool + packageFlag bool + structFlag bool + typeFlag bool + variableFlag bool + urlHeadTag string +) + +func init() { + Command.Flag.BoolVar(&docFlag, "doc", false, "restrict output to documentation only") + Command.Flag.BoolVar(&srcFlag, "src", false, "restrict output to source file only") + Command.Flag.BoolVar(&urlFlag, "url", false, "restrict output to godoc URL only") + Command.Flag.BoolVar(®expFlag, "r", false, "single argument is a regular expression for a name") + Command.Flag.BoolVar(&matchWordFlag, "word", false, "search match whole word") + Command.Flag.BoolVar(&matchCaseFlag, "case", false, "search match case") + + Command.Flag.BoolVar(&constantFlag, "const", false, "show doc for consts only") + Command.Flag.BoolVar(&functionFlag, "func", false, "show doc for funcs only") + Command.Flag.BoolVar(&interfaceFlag, "interface", false, "show doc for interfaces only") + Command.Flag.BoolVar(&methodFlag, "method", false, "show doc for methods only") + Command.Flag.BoolVar(&packageFlag, "package", false, "show top-level package doc only") + Command.Flag.BoolVar(&structFlag, "struct", false, "show doc for structs only") + Command.Flag.BoolVar(&typeFlag, "type", false, "show doc for types only") + Command.Flag.BoolVar(&variableFlag, "var", false, "show doc for vars only") + + Command.Flag.BoolVar(&constantFlag, "c", false, "alias for -const") + Command.Flag.BoolVar(&functionFlag, "f", false, "alias for -func") + Command.Flag.BoolVar(&interfaceFlag, "i", false, "alias for -interface") + Command.Flag.BoolVar(&methodFlag, "m", false, "alias for -method") + Command.Flag.BoolVar(&packageFlag, "pkg", false, "alias for -package") + Command.Flag.BoolVar(&structFlag, "s", false, "alias for -struct") + Command.Flag.BoolVar(&typeFlag, "t", false, "alias for -type") + Command.Flag.BoolVar(&variableFlag, "v", false, "alias for -var") + + Command.Flag.StringVar(&urlHeadTag, "urltag", "", "url head tag, liteide provate") +} + +func runDoc(cmd *command.Command, args []string) error { + if !(constantFlag || functionFlag || interfaceFlag || methodFlag || packageFlag || structFlag || typeFlag || variableFlag) { // none set + constantFlag = true + functionFlag = true + methodFlag = true + // Not package! It's special. + typeFlag = true + variableFlag = true + } + if !(docFlag || srcFlag || urlFlag) { + docFlag = true + srcFlag = true + urlFlag = true + } + var pkg, name string + switch len(args) { + case 1: + if packageFlag { + pkg = args[0] + } else if regexpFlag { + name = args[0] + } else if strings.Contains(args[0], ".") { + pkg, name = split(args[0]) + } else { + name = args[0] + } + case 2: + if packageFlag { + cmd.Usage() + } + pkg, name = args[0], args[1] + default: + cmd.Usage() + return os.ErrInvalid + } + if strings.Contains(pkg, "/") { + fmt.Fprintf(os.Stderr, "doc: package name cannot contain slash (TODO)\n") + os.Exit(2) + } + for _, path := range Paths(pkg) { + lookInDirectory(path, name) + } + return nil +} + +var slash = string(filepath.Separator) +var slashDot = string(filepath.Separator) + "." +var goRootSrcPkg = filepath.Join(runtime.GOROOT(), "src", "pkg") +var goRootSrcCmd = filepath.Join(runtime.GOROOT(), "src", "cmd") +var goPaths = SplitGopath() + +func split(arg string) (pkg, name string) { + dot := strings.IndexRune(arg, '.') // We know there's one there. + return arg[0:dot], arg[dot+1:] +} + +func Paths(pkg string) []string { + pkgs := pathsFor(runtime.GOROOT(), pkg) + for _, root := range goPaths { + pkgs = append(pkgs, pathsFor(root, pkg)...) + } + return pkgs +} + +func SplitGopath() []string { + gopath := os.Getenv("GOPATH") + if gopath == "" { + return nil + } + return strings.Split(gopath, string(os.PathListSeparator)) +} + +// pathsFor recursively walks the tree looking for possible directories for the package: +// those whose basename is pkg. +func pathsFor(root, pkg string) []string { + root = path.Join(root, "src") + pkgPaths := make([]string, 0, 10) + visit := func(pathName string, f os.FileInfo, err error) error { + if err != nil { + return nil + } + // One package per directory. Ignore the files themselves. + if !f.IsDir() { + return nil + } + // No .hg or other dot nonsense please. + if strings.Contains(pathName, slashDot) { + return filepath.SkipDir + } + // Is the last element of the path correct + if pkg == "" || filepath.Base(pathName) == pkg { + pkgPaths = append(pkgPaths, pathName) + } + return nil + } + + filepath.Walk(root, visit) + return pkgPaths +} + +// lookInDirectory looks in the package (if any) in the directory for the named exported identifier. +func lookInDirectory(directory, name string) { + fset := token.NewFileSet() + pkgs, _ := parser.ParseDir(fset, directory, nil, parser.ParseComments) // Ignore the error. + for _, pkg := range pkgs { + if pkg.Name == "main" || strings.HasSuffix(pkg.Name, "_test") { + continue + } + doPackage(pkg, fset, name) + } +} + +// prefixDirectory places the directory name on the beginning of each name in the list. +func prefixDirectory(directory string, names []string) { + if directory != "." { + for i, name := range names { + names[i] = filepath.Join(directory, name) + } + } +} + +// File is a wrapper for the state of a file used in the parser. +// The parse tree walkers are all methods of this type. +type File struct { + fset *token.FileSet + name string // Name of file. + ident string // Identifier we are searching for. + lowerIdent string // lower ident + regexp *regexp.Regexp + pathPrefix string // Prefix from GOROOT/GOPATH. + urlPrefix string // Start of corresponding URL for golang.org or godoc.org. + file *ast.File + comments ast.CommentMap + defs map[*ast.Ident]types.Object + doPrint bool + found bool + allFiles []*File // All files in the package. +} + +// doPackage analyzes the single package constructed from the named files, looking for +// the definition of ident. +func doPackage(pkg *ast.Package, fset *token.FileSet, ident string) { + var files []*File + found := false + for name, astFile := range pkg.Files { + if packageFlag && astFile.Doc == nil { + continue + } + file := &File{ + fset: fset, + name: name, + ident: ident, + lowerIdent: strings.ToLower(ident), + file: astFile, + comments: ast.NewCommentMap(fset, astFile, astFile.Comments), + } + if regexpFlag && regexp.QuoteMeta(ident) != ident { + // It's a regular expression. + var err error + file.regexp, err = regexp.Compile("^(?i:" + ident + ")$") + if err != nil { + fmt.Fprintf(os.Stderr, "regular expression `%s`:", err) + os.Exit(2) + } + } + switch { + case strings.HasPrefix(name, goRootSrcPkg): + file.urlPrefix = "http://golang.org/pkg" + file.pathPrefix = goRootSrcPkg + case strings.HasPrefix(name, goRootSrcCmd): + file.urlPrefix = "http://golang.org/cmd" + file.pathPrefix = goRootSrcCmd + default: + file.urlPrefix = "http://godoc.org" + for _, path := range goPaths { + p := filepath.Join(path, "src") + if strings.HasPrefix(name, p) { + file.pathPrefix = p + break + } + } + } + file.urlPrefix = urlHeadTag + file.urlPrefix + files = append(files, file) + if found { + continue + } + file.doPrint = false + if packageFlag { + file.pkgComments() + } else { + ast.Walk(file, file.file) + if file.found { + found = true + } + } + } + + if !found { + return + } + + // By providing the Context with our own error function, it will continue + // past the first error. There is no need for that function to do anything. + config := types.Config{ + Error: func(error) {}, + } + info := &types.Info{ + Defs: make(map[*ast.Ident]types.Object), + } + path := "" + var astFiles []*ast.File + for name, astFile := range pkg.Files { + if path == "" { + path = name + } + astFiles = append(astFiles, astFile) + } + config.Check(path, fset, astFiles, info) // Ignore errors. + + // We need to search all files for methods, so record the full list in each file. + for _, file := range files { + file.allFiles = files + } + for _, file := range files { + file.doPrint = true + file.defs = info.Defs + if packageFlag { + file.pkgComments() + } else { + ast.Walk(file, file.file) + } + } +} + +// Visit implements the ast.Visitor interface. +func (f *File) Visit(node ast.Node) ast.Visitor { + switch n := node.(type) { + case *ast.GenDecl: + // Variables, constants, types. + for _, spec := range n.Specs { + switch spec := spec.(type) { + case *ast.ValueSpec: + if constantFlag && n.Tok == token.CONST || variableFlag && n.Tok == token.VAR { + for _, ident := range spec.Names { + if f.match(ident.Name) { + f.printNode(n, ident, f.nameURL(ident.Name)) + break + } + } + } + case *ast.TypeSpec: + // If there is only one Spec, there are probably no parens and the + // comment we want appears before the type keyword, bound to + // the GenDecl. If the Specs are parenthesized, the comment we want + // is bound to the Spec. Hence we dig into the GenDecl to the Spec, + // but only if there are no parens. + node := ast.Node(n) + if n.Lparen.IsValid() { + node = spec + } + if f.match(spec.Name.Name) { + if typeFlag { + f.printNode(node, spec.Name, f.nameURL(spec.Name.Name)) + } else { + switch spec.Type.(type) { + case *ast.InterfaceType: + if interfaceFlag { + f.printNode(node, spec.Name, f.nameURL(spec.Name.Name)) + } + case *ast.StructType: + if structFlag { + f.printNode(node, spec.Name, f.nameURL(spec.Name.Name)) + } + } + } + if f.doPrint && f.defs[spec.Name] != nil && f.defs[spec.Name].Type() != nil { + ms := types.NewMethodSet(f.defs[spec.Name].Type()) //.Type().MethodSet() + if ms.Len() == 0 { + ms = types.NewMethodSet(types.NewPointer(f.defs[spec.Name].Type())) //.MethodSet() + } + f.methodSet(ms) + } + } + case *ast.ImportSpec: + continue // Don't care. + } + } + case *ast.FuncDecl: + // Methods, top-level functions. + if f.match(n.Name.Name) { + n.Body = nil // Do not print the function body. + if methodFlag && n.Recv != nil { + f.printNode(n, n.Name, f.methodURL(n.Recv.List[0].Type, n.Name.Name)) + } else if functionFlag && n.Recv == nil { + f.printNode(n, n.Name, f.nameURL(n.Name.Name)) + } + } + } + return f +} + +func (f *File) match(name string) bool { + // name must be exported. + if !ast.IsExported(name) { + return false + } + if f.regexp == nil { + if matchWordFlag { + if matchCaseFlag { + return name == f.ident + } + return strings.ToLower(name) == f.lowerIdent + } else { + if matchCaseFlag { + return strings.Contains(name, f.ident) + } + return strings.Contains(strings.ToLower(name), f.lowerIdent) + } + } + return f.regexp.MatchString(name) +} + +func (f *File) printNode(node, ident ast.Node, url string) { + if !f.doPrint { + f.found = true + return + } + fmt.Printf("%s%s%s", url, f.sourcePos(f.fset.Position(ident.Pos())), f.docs(node)) +} + +func (f *File) docs(node ast.Node) []byte { + if !docFlag { + return nil + } + commentedNode := printer.CommentedNode{Node: node} + if comments := f.comments.Filter(node).Comments(); comments != nil { + commentedNode.Comments = comments + } + var b bytes.Buffer + printer.Fprint(&b, f.fset, &commentedNode) + b.Write([]byte("\n\n")) // Add a blank line between entries if we print documentation. + return b.Bytes() +} + +func (f *File) pkgComments() { + doc := f.file.Doc + if doc == nil { + return + } + url := "" + if urlFlag { + url = f.packageURL() + "\n" + } + docText := "" + if docFlag { + docText = fmt.Sprintf("package %s\n%s\n\n", f.file.Name.Name, doc.Text()) + } + fmt.Printf("%s%s%s", url, f.sourcePos(f.fset.Position(doc.Pos())), docText) +} + +func (f *File) packageURL() string { + s := strings.TrimPrefix(f.name, f.pathPrefix) + // Now we have a path with a final file name. Drop it. + if i := strings.LastIndex(s, slash); i > 0 { + s = s[:i+1] + } + return f.urlPrefix + s +} + +func (f *File) packageName() string { + s := strings.TrimPrefix(f.name, f.pathPrefix) + // Now we have a path with a final file name. Drop it. + if i := strings.LastIndex(s, slash); i > 0 { + s = s[:i+1] + } + s = strings.Trim(s, slash) + return filepath.ToSlash(s) +} + +func (f *File) sourcePos(posn token.Position) string { + if !srcFlag { + return "" + } + return fmt.Sprintf("%s:%d:\n", posn.Filename, posn.Line) +} + +func (f *File) nameURL(name string) string { + if !urlFlag { + return "" + } + return fmt.Sprintf("%s#%s\n", f.packageURL(), name) +} + +func (f *File) methodURL(typ ast.Expr, name string) string { + if !urlFlag { + return "" + } + var b bytes.Buffer + printer.Fprint(&b, f.fset, typ) + typeName := b.Bytes() + if len(typeName) > 0 && typeName[0] == '*' { + typeName = typeName[1:] + } + return fmt.Sprintf("%s#%s.%s\n", f.packageURL(), typeName, name) +} + +// Here follows the code to find and print a method (actually a method set, because +// we want to do only one redundant tree walk, not one per method). +// It should be much easier than walking the whole tree again, but that's what we must do. +// TODO. + +type method struct { + index int // Which doc to write. (Keeps the results sorted) + *types.Selection +} + +type methodVisitor struct { + *File + methods []method + docs []string +} + +func (f *File) methodSet(set *types.MethodSet) { + // Build the set of things we're looking for. + methods := make([]method, 0, set.Len()) + docs := make([]string, set.Len()) + for i := 0; i < set.Len(); i++ { + if ast.IsExported(set.At(i).Obj().Name()) { + m := method{ + i, + set.At(i), + } + methods = append(methods, m) + } + } + if len(methods) == 0 { + return + } + // Collect the docs. + for _, file := range f.allFiles { + visitor := &methodVisitor{ + File: file, + methods: methods, + docs: docs, + } + ast.Walk(visitor, file.file) + methods = visitor.methods + } + // Print them in order. The incoming method set is sorted by name. + for _, doc := range docs { + if doc != "" { + fmt.Print(doc) + } + } +} + +// Visit implements the ast.Visitor interface. +func (visitor *methodVisitor) Visit(node ast.Node) ast.Visitor { + switch n := node.(type) { + case *ast.FuncDecl: + for i, method := range visitor.methods { + // If this is the right one, the position of the name of its identifier will match. + if method.Obj().Pos() == n.Name.Pos() { + n.Body = nil // TODO. Ugly - don't print the function body. + visitor.docs[method.index] = fmt.Sprintf("%s", visitor.File.docs(n)) + // If this was the last method, we're done. + if len(visitor.methods) == 1 { + return nil + } + // Drop this one from the list. + visitor.methods = append(visitor.methods[:i], visitor.methods[i+1:]...) + return visitor + } + } + } + return visitor +} diff --git a/vendor/github.com/visualfc/gotools/goapi/goapi.go b/vendor/github.com/visualfc/gotools/goapi/goapi.go new file mode 100644 index 0000000..92721cc --- /dev/null +++ b/vendor/github.com/visualfc/gotools/goapi/goapi.go @@ -0,0 +1,3774 @@ +// Copyright 2011 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Api computes the exported API of a set of Go packages. + +//modify 2013-2014 visualfc + +package goapi + +import ( + "bufio" + "bytes" + "fmt" + "go/ast" + "go/build" + "go/doc" + "go/parser" + "go/printer" + "go/token" + "io" + "io/ioutil" + "log" + "os" + "os/exec" + "path" + "path/filepath" + "regexp" + "sort" + "strconv" + "strings" + "time" + + "github.com/visualfc/gotools/command" +) + +var Command = &command.Command{ + Run: runApi, + UsageLine: "goapi", + Short: "golang api util", + Long: `golang api util`, +} + +var apiVerbose bool +var apiAllmethods bool +var apiAlldecls bool +var apiShowpos bool +var apiSeparate string +var apiImportParser bool +var apiDefaultCtx bool +var apiCustomCtx string +var apiLookupInfo string +var apiLookupStdin bool +var apiOutput string + +func init() { + Command.Flag.BoolVar(&apiVerbose, "v", false, "verbose debugging") + Command.Flag.BoolVar(&apiAllmethods, "e", true, "extract for all embedded methods") + Command.Flag.BoolVar(&apiAlldecls, "a", false, "extract for all declarations") + Command.Flag.BoolVar(&apiShowpos, "pos", false, "addition token position") + Command.Flag.StringVar(&apiSeparate, "sep", ", ", "setup separators") + Command.Flag.BoolVar(&apiImportParser, "dep", true, "parser package imports") + Command.Flag.BoolVar(&apiDefaultCtx, "default_ctx", true, "extract for default context") + Command.Flag.StringVar(&apiCustomCtx, "custom_ctx", "", "optional comma-separated list of -[-cgo] to override default contexts.") + Command.Flag.StringVar(&apiLookupInfo, "cursor_info", "", "lookup cursor node info\"file.go:pos\"") + Command.Flag.BoolVar(&apiLookupStdin, "cursor_std", false, "cursor_info use stdin") + Command.Flag.StringVar(&apiOutput, "o", "", "output file") +} + +func runApi(cmd *command.Command, args []string) error { + if len(args) == 0 && apiLookupInfo == "" { + cmd.Usage() + return os.ErrInvalid + } + if apiVerbose { + now := time.Now() + defer func() { + log.Println("time", time.Now().Sub(now)) + }() + } + + var pkgs []string + if len(args) > 0 { + if args[0] == "std" || args[0] == "all" { + out, err := exec.Command("go", "list", "-e", args[0]).Output() + if err != nil { + log.Fatal(err) + } + pkgs = strings.Fields(string(out)) + } else { + pkgs = args + } + } + var curinfo CursorInfo + if apiLookupInfo != "" { + pos := strings.Index(apiLookupInfo, ":") + if pos != -1 { + curinfo.file = (apiLookupInfo)[:pos] + if i, err := strconv.Atoi((apiLookupInfo)[pos+1:]); err == nil { + curinfo.pos = token.Pos(i) + } + } + } + + if len(pkgs) == 1 && curinfo.pos != token.NoPos { + curinfo.pkg = pkgs[0] + } + + if apiLookupStdin { + src, err := ioutil.ReadAll(os.Stdin) + if err == nil { + curinfo.src = src + curinfo.std = true + } + } + + if apiCustomCtx != "" { + apiDefaultCtx = false + setCustomContexts() + } + + var features []string + w := NewWalker() + if curinfo.pkg != "" { + w.cursorInfo = &curinfo + } + w.sep = apiSeparate + + if apiDefaultCtx { + w.context = &build.Default + + for _, pkg := range pkgs { + w.wantedPkg[pkg] = true + } + + for _, pkg := range pkgs { + w.WalkPackage(pkg) + } + if w.cursorInfo != nil { + goto lookup + } else { + var file io.Writer + if apiOutput != "" { + var err error + file, err = os.Create(apiOutput) + if err != nil { + log.Fatal(err) + } + } else { + file = os.Stdout + } + bw := bufio.NewWriter(file) + defer bw.Flush() + for _, p := range w.packageMap { + if w.wantedPkg[p.name] { + for _, f := range p.Features() { + fmt.Fprintf(bw, "%s\n", f) + } + } + } + return nil + } + features = w.Features("") + } else { + for _, c := range contexts { + c.Compiler = build.Default.Compiler + } + + for _, pkg := range pkgs { + w.wantedPkg[pkg] = true + } + + var featureCtx = make(map[string]map[string]bool) // feature -> context name -> true + for _, context := range contexts { + w.context = context + w.ctxName = contextName(w.context) + ":" + + for _, pkg := range pkgs { + w.WalkPackage(pkg) + } + if w.cursorInfo != nil && w.cursorInfo.info != nil { + goto lookup + } + } + + for pkg, p := range w.packageMap { + if w.wantedPkg[p.name] { + pos := strings.Index(pkg, ":") + if pos == -1 { + continue + } + ctxName := pkg[:pos] + for _, f := range p.Features() { + if featureCtx[f] == nil { + featureCtx[f] = make(map[string]bool) + } + featureCtx[f][ctxName] = true + } + } + } + + for f, cmap := range featureCtx { + if len(cmap) == len(contexts) { + features = append(features, f) + continue + } + comma := strings.Index(f, ",") + for cname := range cmap { + f2 := fmt.Sprintf("%s (%s)%s", f[:comma], cname, f[comma:]) + features = append(features, f2) + } + } + sort.Strings(features) + } + +lookup: + if w.cursorInfo != nil { + info := w.cursorInfo.info + if info == nil { + os.Exit(1) + return os.ErrInvalid + } + // fmt.Println("kind,", info.Kind) + // fmt.Println("name,", info.Name) + // if info.Type != "" { + // fmt.Println("type,", strings.TrimLeft(info.Type, "*")) + // } + if info.Name == info.Type || info.Type == "" { + fmt.Printf("info, %s, %s\n", info.Kind, info.Name) + } else { + fmt.Printf("info, %s, %s, %s\n", info.Kind, info.Name, info.Type) + } + if info.Kind == KindImport || info.Kind == KindPackage { + if p := w.findPackage(info.Name); p != nil { + fmt.Println("help,", p.name) + } + } + if info.T != nil { + for _, text := range []string{info.Name, info.Type} { + typ := strings.TrimLeft(text, "*") + pos := strings.Index(typ, ".") + if pos != -1 { + if p := w.findPackage(typ[:pos]); p != nil { + fmt.Println("help,", p.name+typ[pos:]) + break + } + } + } + fmt.Println("pos,", w.fset.Position(info.T.Pos())) + } + return nil + } + + fail := false + defer func() { + if fail { + os.Exit(1) + } + }() + + bw := bufio.NewWriter(os.Stdout) + defer bw.Flush() + + for _, f := range features { + fmt.Fprintf(bw, "%s\n", f) + } + return nil +} + +type CursorInfo struct { + pkg string + file string + pos token.Pos + src []byte + std bool + info *TypeInfo +} + +// contexts are the default contexts which are scanned, unless +// overridden by the -contexts flag. +var contexts = []*build.Context{ + {GOOS: "linux", GOARCH: "386", CgoEnabled: true}, + {GOOS: "linux", GOARCH: "386"}, + {GOOS: "linux", GOARCH: "amd64", CgoEnabled: true}, + {GOOS: "linux", GOARCH: "amd64"}, + {GOOS: "linux", GOARCH: "arm"}, + {GOOS: "darwin", GOARCH: "386", CgoEnabled: true}, + {GOOS: "darwin", GOARCH: "386"}, + {GOOS: "darwin", GOARCH: "amd64", CgoEnabled: true}, + {GOOS: "darwin", GOARCH: "amd64"}, + {GOOS: "windows", GOARCH: "amd64"}, + {GOOS: "windows", GOARCH: "386"}, + {GOOS: "freebsd", GOARCH: "amd64"}, + {GOOS: "freebsd", GOARCH: "386"}, +} + +func contextName(c *build.Context) string { + s := c.GOOS + "-" + c.GOARCH + if c.CgoEnabled { + return s + "-cgo" + } + return s +} + +func osArchName(c *build.Context) string { + return c.GOOS + "-" + c.GOARCH +} + +func parseContext(c string) *build.Context { + parts := strings.Split(c, "-") + if len(parts) < 2 { + log.Fatalf("bad context: %q", c) + } + bc := &build.Context{ + GOOS: parts[0], + GOARCH: parts[1], + } + if len(parts) == 3 { + if parts[2] == "cgo" { + bc.CgoEnabled = true + } else { + log.Fatalf("bad context: %q", c) + } + } + return bc +} + +func setCustomContexts() { + contexts = []*build.Context{} + for _, c := range strings.Split(apiCustomCtx, ",") { + contexts = append(contexts, parseContext(c)) + } +} + +func set(items []string) map[string]bool { + s := make(map[string]bool) + for _, v := range items { + s[v] = true + } + return s +} + +var spaceParensRx = regexp.MustCompile(` \(\S+?\)`) + +func featureWithoutContext(f string) string { + if !strings.Contains(f, "(") { + return f + } + return spaceParensRx.ReplaceAllString(f, "") +} + +func compareAPI(w io.Writer, features, required, optional, exception []string, allowNew bool) (ok bool) { + ok = true + + optionalSet := set(optional) + exceptionSet := set(exception) + featureSet := set(features) + + sort.Strings(features) + sort.Strings(required) + + take := func(sl *[]string) string { + s := (*sl)[0] + *sl = (*sl)[1:] + return s + } + + for len(required) > 0 || len(features) > 0 { + switch { + case len(features) == 0 || (len(required) > 0 && required[0] < features[0]): + feature := take(&required) + if exceptionSet[feature] { + fmt.Fprintf(w, "~%s\n", feature) + } else if featureSet[featureWithoutContext(feature)] { + // okay. + } else { + fmt.Fprintf(w, "-%s\n", feature) + ok = false // broke compatibility + } + case len(required) == 0 || (len(features) > 0 && required[0] > features[0]): + newFeature := take(&features) + if optionalSet[newFeature] { + // Known added feature to the upcoming release. + // Delete it from the map so we can detect any upcoming features + // which were never seen. (so we can clean up the nextFile) + delete(optionalSet, newFeature) + } else { + fmt.Fprintf(w, "+%s\n", newFeature) + if !allowNew { + ok = false // we're in lock-down mode for next release + } + } + default: + take(&required) + take(&features) + } + } + + // In next file, but not in API. + var missing []string + for feature := range optionalSet { + missing = append(missing, feature) + } + sort.Strings(missing) + for _, feature := range missing { + fmt.Fprintf(w, "±%s\n", feature) + } + return +} + +func fileFeatures(filename string) []string { + bs, err := ioutil.ReadFile(filename) + if err != nil { + log.Fatalf("Error reading file %s: %v", filename, err) + } + text := strings.TrimSpace(string(bs)) + if text == "" { + return nil + } + return strings.Split(text, "\n") +} + +func isExtract(name string) bool { + if apiAlldecls { + return true + } + return ast.IsExported(name) +} + +// pkgSymbol represents a symbol in a package +type pkgSymbol struct { + pkg string // "net/http" + symbol string // "RoundTripper" +} + +//expression kind +type Kind int + +const ( + KindBuiltin Kind = iota + KindPackage + KindImport + KindVar + KindConst + KindInterface + KindParam + KindStruct + KindMethod + KindField + KindType + KindFunc + KindChan + KindArray + KindMap + KindSlice + KindLabel + KindBranch +) + +func (k Kind) String() string { + switch k { + case KindBuiltin: + return "builtin" + case KindPackage: + return "package" + case KindImport: + return "import" + case KindVar: + return "var" + case KindConst: + return "const" + case KindParam: + return "param" + case KindInterface: + return "interface" + case KindStruct: + return "struct" + case KindMethod: + return "method" + case KindField: + return "field" + case KindType: + return "type" + case KindFunc: + return "func" + case KindChan: + return "chan" + case KindMap: + return "map" + case KindArray: + return "array" + case KindSlice: + return "slice" + case KindLabel: + return "label" + case KindBranch: + return "branch" + } + return fmt.Sprint("unknown-kind") +} + +//expression type +type TypeInfo struct { + Kind Kind + Name string + Type string + X ast.Expr + T ast.Expr +} + +type ExprType struct { + X ast.Expr + T string +} + +type Package struct { + dpkg *doc.Package + apkg *ast.Package + interfaceMethods map[string]([]typeMethod) + interfaces map[string]*ast.InterfaceType //interface + structs map[string]*ast.StructType //struct + types map[string]ast.Expr //type + functions map[string]typeMethod //function + consts map[string]*ExprType //const => type + vars map[string]*ExprType //var => type + name string + dir string + sep string + deps []string + features map[string](token.Pos) // set +} + +func NewPackage() *Package { + return &Package{ + interfaceMethods: make(map[string]([]typeMethod)), + interfaces: make(map[string]*ast.InterfaceType), + structs: make(map[string]*ast.StructType), + types: make(map[string]ast.Expr), + functions: make(map[string]typeMethod), + consts: make(map[string]*ExprType), + vars: make(map[string]*ExprType), + features: make(map[string](token.Pos)), + sep: ", ", + } +} + +func (p *Package) Features() (fs []string) { + for f, ps := range p.features { + if apiShowpos { + fs = append(fs, f+p.sep+strconv.Itoa(int(ps))) + } else { + fs = append(fs, f) + } + } + sort.Strings(fs) + return +} + +func (p *Package) findType(name string) ast.Expr { + for k, v := range p.interfaces { + if k == name { + return v + } + } + for k, v := range p.structs { + if k == name { + return v + } + } + for k, v := range p.types { + if k == name { + return v + } + } + return nil +} + +func funcRetType(ft *ast.FuncType, index int) ast.Expr { + if ft.Results != nil { + pos := 0 + for _, fi := range ft.Results.List { + if fi.Names == nil { + if pos == index { + return fi.Type + } + pos++ + } else { + for _ = range fi.Names { + if pos == index { + return fi.Type + } + pos++ + } + } + } + } + return nil +} + +func findFunction(funcs []*doc.Func, name string) (*ast.Ident, *ast.FuncType) { + for _, f := range funcs { + if f.Name == name { + return &ast.Ident{Name: name, NamePos: f.Decl.Pos()}, f.Decl.Type + } + } + return nil, nil +} + +func (p *Package) findSelectorType(name string) ast.Expr { + if t, ok := p.vars[name]; ok { + return &ast.Ident{ + NamePos: t.X.Pos(), + Name: t.T, + } + } + if t, ok := p.consts[name]; ok { + return &ast.Ident{ + NamePos: t.X.Pos(), + Name: t.T, + } + } + if t, ok := p.functions[name]; ok { + return t.ft + } + for k, v := range p.structs { + if k == name { + return &ast.Ident{ + NamePos: v.Pos(), + Name: name, + } + } + } + for k, v := range p.interfaces { + if k == name { + return &ast.Ident{ + NamePos: v.Pos(), + Name: name, + } + } + } + for k, v := range p.types { + if k == name { + return v + } + } + return nil +} + +func (p *Package) findCallFunc(name string) ast.Expr { + if fn, ok := p.functions[name]; ok { + return fn.ft + } + if s, ok := p.structs[name]; ok { + return s + } + if t, ok := p.types[name]; ok { + return t + } + if v, ok := p.vars[name]; ok { + if strings.HasPrefix(v.T, "func(") { + e, err := parser.ParseExpr(v.T + "{}") + if err == nil { + return e + } + } + } + return nil +} + +func (p *Package) findCallType(name string, index int) ast.Expr { + if fn, ok := p.functions[name]; ok { + return funcRetType(fn.ft, index) + } + if s, ok := p.structs[name]; ok { + return &ast.Ident{ + NamePos: s.Pos(), + Name: name, + } + } + if t, ok := p.types[name]; ok { + return &ast.Ident{ + NamePos: t.Pos(), + Name: name, + } + } + return nil +} + +func (p *Package) findMethod(typ, name string) (*ast.Ident, *ast.FuncType) { + if t, ok := p.interfaces[typ]; ok && t.Methods != nil { + for _, fd := range t.Methods.List { + switch ft := fd.Type.(type) { + case *ast.FuncType: + for _, ident := range fd.Names { + if ident.Name == name { + return ident, ft + } + } + } + } + } + for k, v := range p.interfaceMethods { + if k == typ { + for _, m := range v { + if m.name == name { + return &ast.Ident{Name: name, NamePos: m.pos}, m.ft + } + } + } + } + if p.dpkg == nil { + return nil, nil + } + for _, t := range p.dpkg.Types { + if t.Name == typ { + return findFunction(t.Methods, name) + } + } + return nil, nil +} + +type Walker struct { + context *build.Context + fset *token.FileSet + scope []string + // features map[string](token.Pos) // set + lastConstType string + curPackageName string + sep string + ctxName string + curPackage *Package + constDep map[string]*ExprType // key's const identifier has type of future value const identifier + packageState map[string]loadState + packageMap map[string]*Package + interfaces map[pkgSymbol]*ast.InterfaceType + selectorFullPkg map[string]string // "http" => "net/http", updated by imports + wantedPkg map[string]bool // packages requested on the command line + cursorInfo *CursorInfo + localvar map[string]*ExprType +} + +func NewWalker() *Walker { + return &Walker{ + fset: token.NewFileSet(), + // features: make(map[string]token.Pos), + packageState: make(map[string]loadState), + interfaces: make(map[pkgSymbol]*ast.InterfaceType), + packageMap: make(map[string]*Package), + selectorFullPkg: make(map[string]string), + wantedPkg: make(map[string]bool), + localvar: make(map[string]*ExprType), + sep: ", ", + } +} + +// loadState is the state of a package's parsing. +type loadState int + +const ( + notLoaded loadState = iota + loading + loaded +) + +func (w *Walker) Features(ctx string) (fs []string) { + for pkg, p := range w.packageMap { + if w.wantedPkg[p.name] { + if ctx == "" || strings.HasPrefix(pkg, ctx) { + fs = append(fs, p.Features()...) + } + } + } + sort.Strings(fs) + return +} + +// fileDeps returns the imports in a file. +func fileDeps(f *ast.File) (pkgs []string) { + for _, is := range f.Imports { + fpkg, err := strconv.Unquote(is.Path.Value) + if err != nil { + log.Fatalf("error unquoting import string %q: %v", is.Path.Value, err) + } + if fpkg != "C" { + pkgs = append(pkgs, fpkg) + } + } + return +} + +func (w *Walker) findPackage(pkg string) *Package { + if full, ok := w.selectorFullPkg[pkg]; ok { + if w.ctxName != "" { + ctxName := w.ctxName + full + for k, v := range w.packageMap { + if k == ctxName { + return v + } + } + } + for k, v := range w.packageMap { + if k == full { + return v + } + } + } + return nil +} + +func (w *Walker) findPackageOSArch(pkg string) *Package { + if full, ok := w.selectorFullPkg[pkg]; ok { + ctxName := osArchName(w.context) + ":" + full + for k, v := range w.packageMap { + if k == ctxName { + return v + } + } + } + return nil +} + +// WalkPackage walks all files in package `name'. +// WalkPackage does nothing if the package has already been loaded. + +func (w *Walker) WalkPackage(pkg string) { + if build.IsLocalImport(pkg) { + wd, err := os.Getwd() + if err != nil { + if apiVerbose { + log.Println(err) + } + return + } + dir := filepath.Clean(filepath.Join(wd, pkg)) + bp, err := w.context.ImportDir(dir, 0) + if err != nil { + if apiVerbose { + log.Println(err) + } + return + } + if w.wantedPkg[pkg] == true { + w.wantedPkg[bp.Name] = true + delete(w.wantedPkg, pkg) + } + if w.cursorInfo != nil && w.cursorInfo.pkg == pkg { + w.cursorInfo.pkg = bp.Name + } + w.WalkPackageDir(bp.Name, bp.Dir, bp) + } else if filepath.IsAbs(pkg) { + bp, err := build.ImportDir(pkg, 0) + if err != nil { + if apiVerbose { + log.Println(err) + } + } + if w.wantedPkg[pkg] == true { + w.wantedPkg[bp.Name] = true + delete(w.wantedPkg, pkg) + } + if w.cursorInfo != nil && w.cursorInfo.pkg == pkg { + w.cursorInfo.pkg = bp.Name + } + + w.WalkPackageDir(bp.Name, bp.Dir, bp) + } else { + bp, err := build.Import(pkg, "", build.FindOnly) + if err != nil { + if apiVerbose { + log.Println(err) + } + return + } + w.WalkPackageDir(pkg, bp.Dir, nil) + } +} + +func (w *Walker) WalkPackageDir(name string, dir string, bp *build.Package) { + ctxName := w.ctxName + name + curName := name + switch w.packageState[ctxName] { + case loading: + log.Fatalf("import cycle loading package %q?", name) + return + case loaded: + return + } + w.packageState[ctxName] = loading + w.selectorFullPkg[name] = name + + defer func() { + w.packageState[ctxName] = loaded + }() + + sname := name[strings.LastIndexAny(name, ".-/\\")+1:] + + apkg := &ast.Package{ + Files: make(map[string]*ast.File), + } + if bp == nil { + bp, _ = w.context.ImportDir(dir, 0) + } + if bp == nil { + return + } + if w.ctxName != "" { + isCgo := (len(bp.CgoFiles) > 0) && w.context.CgoEnabled + if isCgo { + curName = ctxName + } else { + isOSArch := false + for _, file := range bp.GoFiles { + if isOSArchFile(w.context, file) { + isOSArch = true + break + } + } + var p *Package + if isOSArch { + curName = osArchName(w.context) + ":" + name + p = w.findPackageOSArch(name) + } else { + curName = name + p = w.findPackage(name) + } + if p != nil { + if apiImportParser { + for _, dep := range p.deps { + if _, ok := w.packageState[dep]; ok { + continue + } + w.WalkPackage(dep) + } + } + w.packageMap[ctxName] = p + return + } + } + } + + files := append(append([]string{}, bp.GoFiles...), bp.CgoFiles...) + + if w.cursorInfo != nil && w.cursorInfo.pkg == name { + files = append(files, bp.TestGoFiles...) + for _, v := range bp.XTestGoFiles { + if v == w.cursorInfo.file { + var xbp build.Package + xbp.Name = name + "_test" + xbp.GoFiles = append(xbp.GoFiles, bp.XTestGoFiles...) + w.cursorInfo.pkg = xbp.Name + w.WalkPackageDir(xbp.Name, dir, &xbp) + break + } + } + } + + if len(files) == 0 { + if apiVerbose { + log.Println("no Go source files in", bp.Dir) + } + return + } + var deps []string + + for _, file := range files { + var src interface{} = nil + if w.cursorInfo != nil && + w.cursorInfo.pkg == name && + w.cursorInfo.file == file && + w.cursorInfo.std { + src = w.cursorInfo.src + } + f, err := parser.ParseFile(w.fset, filepath.Join(dir, file), src, 0) + if err != nil { + if apiVerbose { + log.Printf("error parsing package %s, file %s: %v", name, file, err) + } + } + + if sname != f.Name.Name { + continue + } + apkg.Files[file] = f + if apiImportParser { + deps = fileDeps(f) + for _, dep := range deps { + if _, ok := w.packageState[dep]; ok { + continue + } + w.WalkPackage(dep) + } + } + if apiShowpos && w.wantedPkg[name] { + tf := w.fset.File(f.Pos()) + if tf != nil { + fmt.Printf("pos %s%s%s%s%d%s%d\n", name, w.sep, filepath.Join(dir, file), w.sep, tf.Base(), w.sep, tf.Size()) + } + } + } + /* else { + fdir, err := os.Open(dir) + if err != nil { + log.Fatalln(err) + } + infos, err := fdir.Readdir(-1) + fdir.Close() + if err != nil { + log.Fatalln(err) + } + + for _, info := range infos { + if info.IsDir() { + continue + } + file := info.Name() + if strings.HasPrefix(file, "_") || strings.HasSuffix(file, "_test.go") { + continue + } + if strings.HasSuffix(file, ".go") { + f, err := parser.ParseFile(w.fset, filepath.Join(dir, file), nil, 0) + if err != nil { + if apiVerbose { + log.Printf("error parsing package %s, file %s: %v", name, file, err) + } + continue + } + if f.Name.Name != sname { + continue + } + + apkg.Files[file] = f + if apiImportParser { + for _, dep := range fileDeps(f) { + w.WalkPackage(dep) + } + } + if apiShowpos && w.wantedPkg[name] { + tf := w.fset.File(f.Pos()) + if tf != nil { + fmt.Printf("pos %s%s%s%s%d:%d\n", name, w.sep, filepath.Join(dir, file), w.sep, tf.Base(), tf.Base()+tf.Size()) + } + } + } + } + }*/ + if curName != ctxName { + w.packageState[curName] = loading + + defer func() { + w.packageState[curName] = loaded + }() + } + + if apiVerbose { + log.Printf("package %s => %s, %v", ctxName, curName, w.wantedPkg[curName]) + } + pop := w.pushScope("pkg " + name) + defer pop() + + w.curPackageName = curName + w.constDep = map[string]*ExprType{} + w.curPackage = NewPackage() + w.curPackage.apkg = apkg + w.curPackage.name = name + w.curPackage.dir = dir + w.curPackage.deps = deps + w.curPackage.sep = w.sep + w.packageMap[curName] = w.curPackage + w.packageMap[ctxName] = w.curPackage + + for _, afile := range apkg.Files { + w.recordTypes(afile) + } + + // Register all function declarations first. + for _, afile := range apkg.Files { + for _, di := range afile.Decls { + if d, ok := di.(*ast.FuncDecl); ok { + if !w.isExtract(d.Name.Name) { + continue + } + w.peekFuncDecl(d) + } + } + } + + for _, afile := range apkg.Files { + w.walkFile(afile) + } + + w.resolveConstantDeps() + + if w.cursorInfo != nil && w.cursorInfo.pkg == name { + for k, v := range apkg.Files { + if k == w.cursorInfo.file { + f := w.fset.File(v.Pos()) + if f == nil { + log.Fatalf("error fset postion %v", v.Pos()) + } + info, err := w.lookupFile(v, token.Pos(f.Base())+w.cursorInfo.pos-1) + if err != nil { + log.Fatalln("lookup error,", err) + } else { + if info != nil && info.Kind == KindImport { + for _, is := range v.Imports { + fpath, err := strconv.Unquote(is.Path.Value) + if err == nil { + if info.Name == path.Base(fpath) { + info.T = is.Path + } + } + } + } + w.cursorInfo.info = info + } + break + } + } + return + } + + // Now that we're done walking types, vars and consts + // in the *ast.Package, use go/doc to do the rest + // (functions and methods). This is done here because + // go/doc is destructive. We can't use the + // *ast.Package after this. + var mode doc.Mode + if apiAllmethods { + mode |= doc.AllMethods + } + if apiAlldecls && w.wantedPkg[w.ctxName] { + mode |= doc.AllDecls + } + + dpkg := doc.New(apkg, name, mode) + w.curPackage.dpkg = dpkg + + if w.wantedPkg[name] != true { + return + } + + for _, t := range dpkg.Types { + // Move funcs up to the top-level, not hiding in the Types. + dpkg.Funcs = append(dpkg.Funcs, t.Funcs...) + + for _, m := range t.Methods { + w.walkFuncDecl(m.Decl) + } + } + + for _, f := range dpkg.Funcs { + w.walkFuncDecl(f.Decl) + } +} + +// pushScope enters a new scope (walking a package, type, node, etc) +// and returns a function that will leave the scope (with sanity checking +// for mismatched pushes & pops) +func (w *Walker) pushScope(name string) (popFunc func()) { + w.scope = append(w.scope, name) + return func() { + if len(w.scope) == 0 { + log.Fatalf("attempt to leave scope %q with empty scope list", name) + } + if w.scope[len(w.scope)-1] != name { + log.Fatalf("attempt to leave scope %q, but scope is currently %#v", name, w.scope) + } + w.scope = w.scope[:len(w.scope)-1] + } +} + +func (w *Walker) recordTypes(file *ast.File) { + cur := w.curPackage + for _, di := range file.Decls { + switch d := di.(type) { + case *ast.GenDecl: + switch d.Tok { + case token.TYPE: + for _, sp := range d.Specs { + ts := sp.(*ast.TypeSpec) + name := ts.Name.Name + switch t := ts.Type.(type) { + case *ast.InterfaceType: + if isExtract(name) { + w.noteInterface(name, t) + } + cur.interfaces[name] = t + case *ast.StructType: + cur.structs[name] = t + default: + cur.types[name] = ts.Type + } + } + } + } + } +} + +func inRange(node ast.Node, p token.Pos) bool { + if node == nil { + return false + } + return p >= node.Pos() && p <= node.End() +} + +func (w *Walker) lookupLabel(body *ast.BlockStmt, name string) (*TypeInfo, error) { + for _, stmt := range body.List { + switch v := stmt.(type) { + case *ast.BlockStmt: + return w.lookupLabel(v, name) + case *ast.LabeledStmt: + return &TypeInfo{Kind: KindLabel, Name: v.Label.Name, Type: "branch", T: v.Label}, nil + } + } + return nil, nil +} + +func (w *Walker) lookupFile(file *ast.File, p token.Pos) (*TypeInfo, error) { + if inRange(file.Name, p) { + return &TypeInfo{Kind: KindPackage, X: file.Name, Name: file.Name.Name, Type: file.Name.Name, T: file.Name}, nil + } + for _, di := range file.Decls { + switch d := di.(type) { + case *ast.GenDecl: + if inRange(d, p) { + return w.lookupDecl(d, p, false) + } + case *ast.FuncDecl: + if inRange(d, p) { + info, err := w.lookupDecl(d, p, false) + if info != nil && info.Kind == KindBranch { + return w.lookupLabel(d.Body, info.Name) + } + return info, err + } + if d.Body != nil && inRange(d.Body, p) { + return w.lookupStmt(d.Body, p) + } + default: + return nil, fmt.Errorf("un parser decl %T", di) + } + } + return nil, fmt.Errorf("un find cursor %v", w.fset.Position(p)) +} + +func (w *Walker) isExtract(name string) bool { + if w.wantedPkg[w.curPackageName] || apiAlldecls { + return true + } + return ast.IsExported(name) +} + +func (w *Walker) isType(typ string) *ExprType { + pos := strings.Index(typ, ".") + if pos != -1 { + pkg := typ[:pos] + typ = typ[pos+1:] + if p := w.findPackage(pkg); p != nil { + if t, ok := p.types[typ]; ok { + if r := w.isType(typ); r != nil { + return r + } + return &ExprType{X: t, T: w.pkgRetType(pkg, w.nodeString(t))} + } + } + return nil + } + if t, ok := w.curPackage.types[typ]; ok { + if r := w.isType(w.nodeString(t)); r != nil { + return r + } + return &ExprType{X: t, T: w.nodeString(t)} + } + return nil +} + +func (w *Walker) lookupStmt(vi ast.Stmt, p token.Pos) (*TypeInfo, error) { + if vi == nil { + return nil, nil + } + switch v := vi.(type) { + case *ast.BadStmt: + // + case *ast.EmptyStmt: + // + case *ast.LabeledStmt: + if inRange(v.Label, p) { + return &TypeInfo{Kind: KindLabel, Name: v.Label.Name}, nil + } + return w.lookupStmt(v.Stmt, p) + // + case *ast.DeclStmt: + return w.lookupDecl(v.Decl, p, true) + case *ast.AssignStmt: + if len(v.Lhs) == len(v.Rhs) { + for i := 0; i < len(v.Lhs); i++ { + switch lt := v.Lhs[i].(type) { + case *ast.Ident: + typ, err := w.varValueType(v.Rhs[i], 0) + if err == nil && v.Tok == token.DEFINE { + w.localvar[lt.Name] = &ExprType{T: typ, X: lt} + } else if apiVerbose { + log.Println(err) + } + } + if inRange(v.Lhs[i], p) { + return w.lookupExprInfo(v.Lhs[i], p) + } else if inRange(v.Rhs[i], p) { + return w.lookupExprInfo(v.Rhs[i], p) + } + if fl, ok := v.Rhs[i].(*ast.FuncLit); ok { + if inRange(fl, p) { + return w.lookupStmt(fl.Body, p) + } + } + } + } else if len(v.Rhs) == 1 { + for i := 0; i < len(v.Lhs); i++ { + switch lt := v.Lhs[i].(type) { + case *ast.Ident: + typ, err := w.varValueType(v.Rhs[0], i) + if err == nil && v.Tok == token.DEFINE { + w.localvar[lt.Name] = &ExprType{T: typ, X: lt} + } else if apiVerbose { + log.Println(err) + } + } + if inRange(v.Lhs[i], p) { + return w.lookupExprInfo(v.Lhs[i], p) + } else if inRange(v.Rhs[0], p) { + return w.lookupExprInfo(v.Rhs[0], p) + } + if fl, ok := v.Rhs[0].(*ast.FuncLit); ok { + if inRange(fl, p) { + return w.lookupStmt(fl.Body, p) + } + } + } + } + return nil, nil + case *ast.ExprStmt: + return w.lookupExprInfo(v.X, p) + case *ast.BlockStmt: + for _, st := range v.List { + if inRange(st, p) { + return w.lookupStmt(st, p) + } + _, err := w.lookupStmt(st, p) + if err != nil { + log.Println(err) + } + } + case *ast.IfStmt: + if inRange(v.Init, p) { + return w.lookupStmt(v.Init, p) + } else { + w.lookupStmt(v.Init, p) + } + if inRange(v.Cond, p) { + return w.lookupExprInfo(v.Cond, p) + } else if inRange(v.Body, p) { + return w.lookupStmt(v.Body, p) + } else if inRange(v.Else, p) { + return w.lookupStmt(v.Else, p) + } + case *ast.SendStmt: + if inRange(v.Chan, p) { + return w.lookupExprInfo(v.Chan, p) + } else if inRange(v.Value, p) { + return w.lookupExprInfo(v.Value, p) + } + case *ast.IncDecStmt: + return w.lookupExprInfo(v.X, p) + case *ast.GoStmt: + return w.lookupExprInfo(v.Call, p) + case *ast.DeferStmt: + return w.lookupExprInfo(v.Call, p) + case *ast.ReturnStmt: + for _, r := range v.Results { + if inRange(r, p) { + return w.lookupExprInfo(r, p) + } + } + case *ast.BranchStmt: + if inRange(v.Label, p) { + return &TypeInfo{Kind: KindBranch, Name: v.Label.Name, Type: "label", T: v.Label}, nil + } + // + case *ast.CaseClause: + for _, r := range v.List { + if inRange(r, p) { + return w.lookupExprInfo(r, p) + } + } + for _, body := range v.Body { + if inRange(body, p) { + return w.lookupStmt(body, p) + } else { + w.lookupStmt(body, p) + } + } + case *ast.SwitchStmt: + if inRange(v.Init, p) { + return w.lookupStmt(v.Init, p) + } else { + w.lookupStmt(v.Init, p) + } + if inRange(v.Tag, p) { + return w.lookupExprInfo(v.Tag, p) + } else if inRange(v.Body, p) { + return w.lookupStmt(v.Body, p) + } + case *ast.TypeSwitchStmt: + if inRange(v.Assign, p) { + return w.lookupStmt(v.Assign, p) + } else { + w.lookupStmt(v.Assign, p) + } + if inRange(v.Init, p) { + return w.lookupStmt(v.Init, p) + } else { + w.lookupStmt(v.Init, p) + } + var vs string + if as, ok := v.Assign.(*ast.AssignStmt); ok { + if len(as.Lhs) == 1 { + vs = w.nodeString(as.Lhs[0]) + } + } + if inRange(v.Body, p) { + for _, s := range v.Body.List { + if inRange(s, p) { + switch cs := s.(type) { + case *ast.CaseClause: + for _, r := range cs.List { + if inRange(r, p) { + return w.lookupExprInfo(r, p) + } else if vs != "" { + typ, err := w.varValueType(r, 0) + if err == nil { + w.localvar[vs] = &ExprType{T: typ, X: r} + } + } + } + for _, body := range cs.Body { + if inRange(body, p) { + return w.lookupStmt(body, p) + } else { + w.lookupStmt(body, p) + } + } + default: + return w.lookupStmt(cs, p) + } + } + } + } + case *ast.CommClause: + if inRange(v.Comm, p) { + return w.lookupStmt(v.Comm, p) + } + for _, body := range v.Body { + if inRange(body, p) { + return w.lookupStmt(body, p) + } + } + case *ast.SelectStmt: + if inRange(v.Body, p) { + return w.lookupStmt(v.Body, p) + } + case *ast.ForStmt: + if inRange(v.Init, p) { + return w.lookupStmt(v.Init, p) + } else { + w.lookupStmt(v.Init, p) + } + if inRange(v.Cond, p) { + return w.lookupExprInfo(v.Cond, p) + } else if inRange(v.Body, p) { + return w.lookupStmt(v.Body, p) + } else if inRange(v.Post, p) { + return w.lookupStmt(v.Post, p) + } + case *ast.RangeStmt: + if inRange(v.X, p) { + return w.lookupExprInfo(v.X, p) + } else if inRange(v.Key, p) { + return &TypeInfo{Kind: KindBuiltin, Name: w.nodeString(v.Key), Type: "int"}, nil + } else if inRange(v.Value, p) { + typ, err := w.lookupExprInfo(v.X, p) + if typ != nil { + typ.Name = w.nodeString(v.Value) + return typ, err + } + } else { + typ, err := w.varValueType(v.X, 0) + //check is type + if t := w.isType(typ); t != nil { + typ = t.T + } + if err == nil { + var kt, vt string + if strings.HasPrefix(typ, "[]") { + kt = "int" + vt = typ[2:] + } else if strings.HasPrefix(typ, "map[") { + node, err := parser.ParseExpr(typ + "{}") + if err == nil { + if cl, ok := node.(*ast.CompositeLit); ok { + if m, ok := cl.Type.(*ast.MapType); ok { + kt = w.nodeString(w.namelessType(m.Key)) + vt = w.nodeString(w.namelessType(m.Value)) + } + } + } + } + if inRange(v.Key, p) { + return &TypeInfo{Kind: KindVar, X: v.Key, Name: w.nodeString(v.Key), T: v.X, Type: kt}, nil + } else if inRange(v.Value, p) { + return &TypeInfo{Kind: KindVar, X: v.Value, Name: w.nodeString(v.Value), T: v.X, Type: vt}, nil + } + if key, ok := v.Key.(*ast.Ident); ok { + w.localvar[key.Name] = &ExprType{T: kt, X: v.Key} + } + if value, ok := v.Value.(*ast.Ident); ok { + w.localvar[value.Name] = &ExprType{T: vt, X: v.Value} + } + } + } + if inRange(v.Body, p) { + return w.lookupStmt(v.Body, p) + } + } + return nil, nil //fmt.Errorf("not lookup stmt %v %T", vi, vi) +} + +func (w *Walker) lookupVar(vs *ast.ValueSpec, p token.Pos, local bool) (*TypeInfo, error) { + if inRange(vs.Type, p) { + return w.lookupExprInfo(vs.Type, p) + } + for _, v := range vs.Values { + if inRange(v, p) { + return w.lookupExprInfo(v, p) + } + } + if vs.Type != nil { + typ := w.nodeString(vs.Type) + for _, ident := range vs.Names { + if local { + w.localvar[ident.Name] = &ExprType{T: typ, X: ident} + } + if inRange(ident, p) { + return &TypeInfo{Kind: KindVar, X: ident, Name: ident.Name, T: vs.Type, Type: typ}, nil + } + } + } else if len(vs.Names) == len(vs.Values) { + for n, ident := range vs.Names { + typ := "" + if !local { + if t, ok := w.curPackage.vars[ident.Name]; ok { + typ = t.T + } + } else { + typ, err := w.varValueType(vs.Values[n], n) + if err != nil { + if apiVerbose { + log.Printf("unknown type of variable2 %q, type %T, error = %v, pos=%s", + ident.Name, vs.Values[n], err, w.fset.Position(vs.Pos())) + } + typ = "unknown-type" + } + w.localvar[ident.Name] = &ExprType{T: typ, X: ident} + } + if inRange(ident, p) { + return &TypeInfo{Kind: KindVar, X: ident, Name: ident.Name, T: ident, Type: typ}, nil + } + } + } else if len(vs.Values) == 1 { + for n, ident := range vs.Names { + typ := "" + if !local { + if t, ok := w.curPackage.vars[ident.Name]; ok { + typ = t.T + } + } else { + typ, err := w.varValueType(vs.Values[0], n) + if err != nil { + if apiVerbose { + log.Printf("unknown type of variable3 %q, type %T, error = %v, pos=%s", + ident.Name, vs.Values[0], err, w.fset.Position(vs.Pos())) + } + typ = "unknown-type" + } + w.localvar[ident.Name] = &ExprType{T: typ, X: ident} + } + if inRange(ident, p) { + return &TypeInfo{Kind: KindVar, X: ident, Name: ident.Name, T: ident, Type: typ}, nil + } + } + } + return nil, fmt.Errorf("not lookup var local:%v value:%v type:s%T", local, w.nodeString(vs), vs) +} + +func (w *Walker) lookupConst(vs *ast.ValueSpec, p token.Pos, local bool) (*TypeInfo, error) { + if inRange(vs.Type, p) { + return w.lookupExprInfo(vs.Type, p) + } + for _, ident := range vs.Names { + typ := "" + if !local { + if t, ok := w.curPackage.consts[ident.Name]; ok { + typ = t.T + } + } else { + litType := "" + if vs.Type != nil { + litType = w.nodeString(vs.Type) + } else { + litType = w.lastConstType + if vs.Values != nil { + if len(vs.Values) != 1 { + if apiVerbose { + log.Printf("const %q, values: %#v", ident.Name, vs.Values) + } + return nil, nil + } + var err error + litType, err = w.constValueType(vs.Values[0]) + if err != nil { + if apiVerbose { + log.Printf("unknown kind in const %q (%T): %v", ident.Name, vs.Values[0], err) + } + litType = "unknown-type" + } + } + } + w.lastConstType = litType + typ = litType + w.localvar[ident.Name] = &ExprType{T: typ, X: ident} + } + if inRange(ident, p) { + return &TypeInfo{Kind: KindConst, X: ident, Name: ident.Name, T: ident, Type: typ}, nil + } + } + return nil, nil +} + +func (w *Walker) lookupType(ts *ast.TypeSpec, p token.Pos, local bool) (*TypeInfo, error) { + switch t := ts.Type.(type) { + case *ast.StructType: + if inRange(t.Fields, p) { + for _, fd := range t.Fields.List { + if inRange(fd.Type, p) { + return w.lookupExprInfo(fd.Type, p) + } + for _, ident := range fd.Names { + if inRange(ident, p) { + return &TypeInfo{Kind: KindField, X: ident, Name: ts.Name.Name + "." + ident.Name, T: fd.Type, Type: w.nodeString(w.namelessType(fd.Type))}, nil + } + } + } + } + return &TypeInfo{Kind: KindStruct, X: ts.Name, Name: ts.Name.Name, T: ts.Type, Type: "struct"}, nil + case *ast.InterfaceType: + if inRange(t.Methods, p) { + for _, fd := range t.Methods.List { + for _, ident := range fd.Names { + if inRange(ident, p) { + return &TypeInfo{Kind: KindMethod, X: ident, Name: ts.Name.Name + "." + ident.Name, T: ident, Type: w.nodeString(w.namelessType(fd.Type))}, nil + } + } + if inRange(fd.Type, p) { + return w.lookupExprInfo(fd.Type, p) + } + } + } + return &TypeInfo{Kind: KindInterface, X: ts.Name, Name: ts.Name.Name, T: ts.Type, Type: "interface"}, nil + default: + return &TypeInfo{Kind: KindType, X: ts.Name, Name: ts.Name.Name, T: ts.Type, Type: w.nodeString(w.namelessType(ts.Type))}, nil + } + return nil, nil +} + +func (w *Walker) lookupDecl(di ast.Decl, p token.Pos, local bool) (*TypeInfo, error) { + switch d := di.(type) { + case *ast.GenDecl: + switch d.Tok { + case token.IMPORT: + for _, sp := range d.Specs { + is := sp.(*ast.ImportSpec) + fpath, err := strconv.Unquote(is.Path.Value) + if err != nil { + return nil, err + } + name := path.Base(fpath) + if is.Name != nil { + name = is.Name.Name + } + if inRange(sp, p) { + return &TypeInfo{Kind: KindImport, X: is.Name, Name: name, T: is.Name, Type: fpath}, nil + } + } + case token.CONST: + for _, sp := range d.Specs { + if inRange(sp, p) { + return w.lookupConst(sp.(*ast.ValueSpec), p, local) + } else { + w.lookupConst(sp.(*ast.ValueSpec), p, local) + } + } + return nil, nil + case token.TYPE: + for _, sp := range d.Specs { + if inRange(sp, p) { + return w.lookupType(sp.(*ast.TypeSpec), p, local) + } else { + w.lookupType(sp.(*ast.TypeSpec), p, local) + } + } + case token.VAR: + for _, sp := range d.Specs { + if inRange(sp, p) { + return w.lookupVar(sp.(*ast.ValueSpec), p, local) + } else { + w.lookupVar(sp.(*ast.ValueSpec), p, local) + } + } + return nil, nil + default: + return nil, fmt.Errorf("unknown token type %d %T in GenDecl", d.Tok, d) + } + case *ast.FuncDecl: + if d.Type.Params != nil { + for _, fd := range d.Type.Params.List { + if inRange(fd, p) { + return w.lookupExprInfo(fd.Type, p) + } + for _, ident := range fd.Names { + if inRange(ident, p) { + info, err := w.lookupExprInfo(fd.Type, p) + if err == nil { + return &TypeInfo{Kind: KindParam, X: ident, Name: ident.Name, T: info.T, Type: info.Type}, nil + } + } + typ, err := w.varValueType(fd.Type, 0) + if err == nil { + w.localvar[ident.Name] = &ExprType{T: typ, X: ident} + } else if apiVerbose { + log.Println(err) + } + } + } + } + if d.Type.Results != nil { + for _, fd := range d.Type.Results.List { + if inRange(fd, p) { + return w.lookupExprInfo(fd.Type, p) + } + for _, ident := range fd.Names { + typ, err := w.varValueType(fd.Type, 0) + if err == nil { + w.localvar[ident.Name] = &ExprType{T: typ, X: ident} + } + } + } + } + if d.Recv != nil { + for _, fd := range d.Recv.List { + if inRange(fd, p) { + return w.lookupExprInfo(fd.Type, p) + } + for _, ident := range fd.Names { + w.localvar[ident.Name] = &ExprType{T: w.nodeString(fd.Type), X: ident} + } + } + } + if inRange(d.Body, p) { + return w.lookupStmt(d.Body, p) + } + var fname = d.Name.Name + kind := KindFunc + if d.Recv != nil { + recvTypeName, imp := baseTypeName(d.Recv.List[0].Type) + if imp { + return nil, nil + } + fname = recvTypeName + "." + d.Name.Name + kind = KindMethod + } + return &TypeInfo{Kind: kind, X: d.Name, Name: fname, T: d.Type, Type: w.nodeString(w.namelessType(d.Type))}, nil + default: + return nil, fmt.Errorf("unhandled %T, %#v\n", di, di) + } + return nil, fmt.Errorf("not lookupDecl %v %T", w.nodeString(di), di) +} + +func (w *Walker) lookupExprInfo(vi ast.Expr, p token.Pos) (*TypeInfo, error) { + _, info, err := w.lookupExpr(vi, p) + return info, err +} + +// lookupExpr , return name,info,error +func (w *Walker) lookupExpr(vi ast.Expr, p token.Pos) (string, *TypeInfo, error) { + if apiVerbose { + log.Printf("lookup expr %v %T", w.nodeString(vi), vi) + } + switch v := vi.(type) { + case *ast.BasicLit: + litType, ok := varType[v.Kind] + if !ok { + return "", nil, fmt.Errorf("unknown basic literal kind %#v", v) + } + name := v.Value + if len(name) >= 128 { + name = name[:128] + "..." + } + return litType, &TypeInfo{Kind: KindBuiltin, X: v, Name: name, T: v, Type: litType}, nil + case *ast.StarExpr: + s, info, err := w.lookupExpr(v.X, p) + if err != nil { + return "", nil, err + } + return "*" + s, &TypeInfo{Kind: info.Kind, X: v, Name: "*" + info.Name, T: info.T, Type: "*" + info.Type}, err + case *ast.InterfaceType: + return "interface{}", &TypeInfo{Kind: KindInterface, X: v, Name: w.nodeString(v), T: v, Type: "interface{}"}, nil + case *ast.Ellipsis: + s, info, err := w.lookupExpr(v.Elt, p) + if err != nil { + return "", nil, err + } + return "[]" + s, &TypeInfo{Kind: KindArray, X: v.Elt, Name: "..." + s, T: info.T, Type: "[]" + info.Type}, nil + case *ast.KeyValueExpr: + if inRange(v.Key, p) { + return w.lookupExpr(v.Key, p) + } else if inRange(v.Value, p) { + return w.lookupExpr(v.Value, p) + } + case *ast.CompositeLit: + typ, err := w.varValueType(v.Type, 0) + if err == nil { + typ = strings.TrimLeft(typ, "*") + if strings.HasPrefix(typ, "[]") { + typ = strings.TrimLeft(typ[2:], "*") + } + pos := strings.Index(typ, ".") + var pt *Package = w.curPackage + var pkgdot string + if pos != -1 { + pkg := typ[:pos] + typ = typ[pos+1:] + pt = w.findPackage(pkg) + if pt != nil { + pkgdot = pkg + "." + } + } + if pt != nil { + if ss, ok := pt.structs[typ]; ok { + for _, elt := range v.Elts { + if inRange(elt, p) { + if cl, ok := elt.(*ast.CompositeLit); ok { + for _, elt := range cl.Elts { + if inRange(elt, p) { + if kv, ok := elt.(*ast.KeyValueExpr); ok { + if inRange(kv.Key, p) { + n, t := w.findStructField(ss, w.nodeString(kv.Key)) + if n != nil { + return pkgdot + typ + "." + w.nodeString(kv.Key), &TypeInfo{Kind: KindField, X: kv.Key, Name: pkgdot + typ + "." + w.nodeString(kv.Key), T: n, Type: w.nodeString(w.namelessType(t))}, nil + } + } else if inRange(kv.Value, p) { + return w.lookupExpr(kv.Value, p) + } + } + } + } + } + if kv, ok := elt.(*ast.KeyValueExpr); ok { + if inRange(kv.Key, p) { + n, t := w.findStructField(ss, w.nodeString(kv.Key)) + if n != nil { + return typ + "." + w.nodeString(kv.Key), &TypeInfo{Kind: KindField, X: kv.Key, Name: typ + "." + w.nodeString(kv.Key), T: n, Type: w.nodeString(w.namelessType(t))}, nil + } + } else if inRange(kv.Value, p) { + return w.lookupExpr(kv.Value, p) + } + } + } + } + } + } + } + for _, elt := range v.Elts { + if inRange(elt, p) { + return w.lookupExpr(elt, p) + } + } + return w.lookupExpr(v.Type, p) + case *ast.UnaryExpr: + s, info, err := w.lookupExpr(v.X, p) + return v.Op.String() + s, info, err + case *ast.TypeAssertExpr: + if inRange(v.X, p) { + return w.lookupExpr(v.X, p) + } + return w.lookupExpr(v.Type, p) + case *ast.BinaryExpr: + if inRange(v.X, p) { + return w.lookupExpr(v.X, p) + } else if inRange(v.Y, p) { + return w.lookupExpr(v.Y, p) + } + return "", nil, nil + case *ast.CallExpr: + for _, arg := range v.Args { + if inRange(arg, p) { + return w.lookupExpr(arg, p) + } + } + switch ft := v.Fun.(type) { + case *ast.Ident: + if typ, ok := w.localvar[ft.Name]; ok { + return ft.Name, &TypeInfo{Kind: KindVar, X: ft, Name: ft.Name, T: typ.X, Type: typ.T}, nil + } + if typ, ok := w.curPackage.vars[ft.Name]; ok { + return ft.Name, &TypeInfo{Kind: KindVar, X: v, Name: ft.Name, T: typ.X, Type: typ.T}, nil + } + if typ, ok := w.curPackage.functions[ft.Name]; ok { + return ft.Name, &TypeInfo{Kind: KindFunc, X: ft, Name: ft.Name, T: typ.ft, Type: typ.sig}, nil + } + if typ, ok := w.curPackage.interfaces[ft.Name]; ok { + return ft.Name, &TypeInfo{Kind: KindInterface, X: ft, Name: ft.Name, T: typ, Type: w.nodeString(w.namelessType(typ))}, nil + } + if typ, ok := w.curPackage.interfaces[ft.Name]; ok { + return ft.Name, &TypeInfo{Kind: KindInterface, X: ft, Name: ft.Name, T: typ, Type: w.nodeString(w.namelessType(typ))}, nil + } + if typ, ok := w.curPackage.structs[ft.Name]; ok { + return ft.Name, &TypeInfo{Kind: KindStruct, X: ft, Name: ft.Name, T: typ, Type: w.nodeString(w.namelessType(typ))}, nil + } + if typ, ok := w.curPackage.types[ft.Name]; ok { + return ft.Name, &TypeInfo{Kind: KindType, X: ft, Name: ft.Name, T: typ, Type: w.nodeString(w.namelessType(typ))}, nil + } + if isBuiltinType(ft.Name) { + return ft.Name, &TypeInfo{Kind: KindBuiltin, X: ft, Name: ft.Name}, nil + } + return "", nil, fmt.Errorf("lookup unknown ident %v", v) + case *ast.FuncLit: + if inRange(ft.Body, p) { + info, err := w.lookupStmt(ft.Body, p) + if err == nil { + return "", info, nil + } + return "", nil, err + } + return w.lookupExpr(ft.Type, p) + case *ast.ParenExpr: + return w.lookupExpr(ft.X, p) + case *ast.SelectorExpr: + switch st := ft.X.(type) { + case *ast.Ident: + if inRange(st, p) { + return w.lookupExpr(st, p) + } + s, info, err := w.lookupExpr(st, p) + if err != nil { + return "", nil, err + } + typ := info.Type + if typ == "" { + typ = s + } + fname := typ + "." + ft.Sel.Name + typ = strings.TrimLeft(typ, "*") + if fn, ok := w.curPackage.functions[fname]; ok { + return fname, &TypeInfo{Kind: KindMethod, X: st, Name: fname, T: fn.ft, Type: w.nodeString(w.namelessType(fn.ft))}, nil + } + info, e := w.lookupFunction(typ, ft.Sel.Name) + if e != nil { + return "", nil, e + } + return fname, info, nil + case *ast.SelectorExpr: + if inRange(st.X, p) { + return w.lookupExpr(st.X, p) + } + if inRange(st, p) { + return w.lookupExpr(st, p) + } + typ, err := w.varValueType(st, 0) + if err != nil { + return "", nil, err + } + /* + typ = strings.TrimLeft(typ, "*") + if t := w.curPackage.findType(typ); t != nil { + if ss, ok := t.(*ast.StructType); ok { + for _, fi := range ss.Fields.List { + for _, n := range fi.Names { + if n.Name == st.Sel.Name { + //return fname, &TypeInfo{Kind: KindField, X: n, Name: fname, T: fi.Type, Type: w.nodeString(w.namelessType(fi.Type))}, nil + typ = w.nodeString(w.namelessType(fi.Type)) + } + } + } + } + } + */ + info, e := w.lookupFunction(typ, ft.Sel.Name) + if e != nil { + return "", nil, e + } + return typ + "." + st.Sel.Name, info, nil + case *ast.CallExpr: + if inRange(st, p) { + return w.lookupExpr(st, p) + } + if info, err := w.lookupExprInfo(st, p); err == nil { + if fn, ok := info.X.(*ast.FuncType); ok { + if fn.Results.NumFields() == 1 { + info, err := w.lookupFunction(w.nodeString(fn.Results.List[0].Type), ft.Sel.Name) + if err == nil { + return info.Name, info, err + } + return "", nil, err + } + } + } + //w.lookupFunction(w.nodeString(info.X)) + typ, err := w.varValueType(st, 0) + if err != nil { + return "", nil, err + } + info, e := w.lookupFunction(typ, ft.Sel.Name) + if e != nil { + return "", nil, e + } + return typ + "." + ft.Sel.Name, info, nil + case *ast.TypeAssertExpr: + if inRange(st.X, p) { + return w.lookupExpr(st.X, p) + } + typ := w.nodeString(w.namelessType(st.Type)) + info, e := w.lookupFunction(typ, ft.Sel.Name) + if e != nil { + return "", nil, e + } + return typ + "." + ft.Sel.Name, info, nil + default: + return "", nil, fmt.Errorf("not find select %v %T", v, st) + } + } + return "", nil, fmt.Errorf("not find call %v %T", w.nodeString(v), v.Fun) + case *ast.SelectorExpr: + switch st := v.X.(type) { + case *ast.Ident: + if inRange(st, p) { + return w.lookupExpr(st, p) + } + info, err := w.lookupSelector(st.Name, v.Sel.Name) + if err != nil { + return "", nil, err + } + return st.Name + "." + v.Sel.Name, info, nil + // case *ast.CallExpr: + // typ, err := w.varValueType(v.X, index) + // if err == nil { + // if strings.HasPrefix(typ, "*") { + // typ = typ[1:] + // } + // t := w.curPackage.findType(typ) + // if st, ok := t.(*ast.StructType); ok { + // for _, fi := range st.Fields.List { + // for _, n := range fi.Names { + // if n.Name == v.Sel.Name { + // return w.varValueType(fi.Type, index) + // } + // } + // } + // } + // } + case *ast.SelectorExpr: + if inRange(st.X, p) { + return w.lookupExpr(st.X, p) + } + + if inRange(st, p) { + return w.lookupExpr(st, p) + } + + typ, err := w.varValueType(st, 0) + if err == nil { + info, err := w.lookupSelector(typ, v.Sel.Name) + if err != nil { + return "", nil, err + } + return typ + v.Sel.Name, info, nil + } + // case *ast.IndexExpr: + // typ, err := w.varValueType(st.X, 0) + // log.Println(typ, err) + // if err == nil { + // if strings.HasPrefix(typ, "[]") { + // return w.varSelectorType(typ[2:], v.Sel.Name) + // } + // } + } + return "", nil, fmt.Errorf("unknown lookup selector expr: %T %s.%s", v.X, w.nodeString(v.X), v.Sel) + + // s, info, err := w.lookupExpr(v.X, p) + // if err != nil { + // return "", "", err + // } + // if strings.HasPrefix(s, "*") { + // s = s[1:] + // } + // if inRange(v.X, p) { + // return s, info, err + // } + // t := w.curPackage.findType(s) + // fname := s + "." + v.Sel.Name + // if st, ok := t.(*ast.StructType); ok { + // for _, fi := range st.Fields.List { + // for _, n := range fi.Names { + // if n.Name == v.Sel.Name { + // return fname, fmt.Sprintf("var,%s,%s,%s", fname, w.nodeString(w.namelessType(fi.Type)), w.fset.Position(n.Pos())), nil + // } + // } + // } + // } + // log.Println(">>", s) + // info, e := w.lookupSelector(s, v.Sel.Name) + // return fname, info, e + case *ast.Ident: + if typ, ok := w.localvar[v.Name]; ok { + return typ.T, &TypeInfo{Kind: KindVar, X: v, Name: v.Name, T: typ.X, Type: typ.T}, nil + } + if typ, ok := w.curPackage.interfaces[v.Name]; ok { + return v.Name, &TypeInfo{Kind: KindInterface, X: v, Name: v.Name, T: typ, Type: "interface"}, nil + } + if typ, ok := w.curPackage.structs[v.Name]; ok { + return v.Name, &TypeInfo{Kind: KindStruct, X: v, Name: v.Name, T: typ, Type: "struct"}, nil + } + if typ, ok := w.curPackage.types[v.Name]; ok { + return v.Name, &TypeInfo{Kind: KindType, X: v, Name: v.Name, T: typ, Type: v.Name}, nil + } + if typ, ok := w.curPackage.vars[v.Name]; ok { + return v.Name, &TypeInfo{Kind: KindVar, X: v, Name: v.Name, T: typ.X, Type: typ.T}, nil + } + if typ, ok := w.curPackage.consts[v.Name]; ok { + return v.Name, &TypeInfo{Kind: KindConst, X: v, Name: v.Name, T: typ.X, Type: typ.T}, nil + } + if typ, ok := w.curPackage.functions[v.Name]; ok { + return v.Name, &TypeInfo{Kind: KindFunc, X: typ.ft, Name: v.Name, T: typ.ft, Type: typ.sig}, nil + } + if p := w.findPackage(v.Name); p != nil { + return v.Name, &TypeInfo{Kind: KindImport, X: v, Name: v.Name, Type: p.name}, nil + } + if isBuiltinType(v.Name) { + return v.Name, &TypeInfo{Kind: KindBuiltin, Name: v.Name}, nil + } + return "", nil, fmt.Errorf("lookup unknown ident %v", v) + //return v.Name, &TypeInfo{Kind: KindVar, X: v, Name: v.Name, T: v, Type: v.Name}, nil + case *ast.IndexExpr: + if inRange(v.Index, p) { + return w.lookupExpr(v.Index, p) + } + return w.lookupExpr(v.X, p) + case *ast.ParenExpr: + return w.lookupExpr(v.X, p) + case *ast.FuncLit: + if inRange(v.Type, p) { + return w.lookupExpr(v.Type, p) + } else { + w.lookupExpr(v.Type, p) + } + typ, err := w.varValueType(v.Type, 0) + if err != nil { + return "", nil, err + } + info, e := w.lookupStmt(v.Body, p) + if e != nil { + return "", nil, err + } + return typ, info, nil + case *ast.FuncType: + if v.Params != nil { + for _, fd := range v.Params.List { + if inRange(fd, p) { + return w.lookupExpr(fd.Type, p) + } + for _, ident := range fd.Names { + typ, err := w.varValueType(fd.Type, 0) + if err == nil { + w.localvar[ident.Name] = &ExprType{T: typ, X: ident} + } + } + } + } + if v.Results != nil { + for _, fd := range v.Results.List { + if inRange(fd, p) { + return w.lookupExpr(fd.Type, p) + } + for _, ident := range fd.Names { + typ, err := w.varValueType(fd.Type, 0) + if err == nil { + w.localvar[ident.Name] = &ExprType{T: typ, X: ident} + } + } + } + } + return "", nil, nil + case *ast.ArrayType: + s, info, err := w.lookupExpr(v.Elt, p) + if err != nil { + return "", nil, err + } + return "[]" + s, &TypeInfo{Kind: KindArray, Name: "[]" + info.Name, Type: "[]" + info.Type, T: info.T}, nil + case *ast.SliceExpr: + if inRange(v.High, p) { + return w.lookupExpr(v.High, p) + } else if inRange(v.Low, p) { + return w.lookupExpr(v.Low, p) + } + return w.lookupExpr(v.X, p) + case *ast.MapType: + if inRange(v.Key, p) { + return w.lookupExpr(v.Key, p) + } else if inRange(v.Value, p) { + return w.lookupExpr(v.Value, p) + } + typ, err := w.varValueType(v, 0) + if err != nil { + return "", nil, err + } + return typ, &TypeInfo{Kind: KindMap, X: v, Name: w.nodeString(v), T: v, Type: typ}, nil + case *ast.ChanType: + if inRange(v.Value, p) { + return w.lookupExpr(v.Value, p) + } + typ, err := w.varValueType(v, 0) + if err != nil { + return "", nil, err + } + return typ, &TypeInfo{Kind: KindChan, X: v, Name: w.nodeString(v), T: v, Type: typ}, nil + default: + return "", nil, fmt.Errorf("not lookupExpr %v %T", w.nodeString(v), v) + } + return "", nil, fmt.Errorf("not lookupExpr %v %T", w.nodeString(vi), vi) +} + +func (w *Walker) walkFile(file *ast.File) { + // Not entering a scope here; file boundaries aren't interesting. + for _, di := range file.Decls { + switch d := di.(type) { + case *ast.GenDecl: + switch d.Tok { + case token.IMPORT: + for _, sp := range d.Specs { + is := sp.(*ast.ImportSpec) + fpath, err := strconv.Unquote(is.Path.Value) + if err != nil { + log.Fatal(err) + } + //name := path.Base(fpath) + name := fpath + if i := strings.LastIndexAny(name, ".-/\\"); i > 0 { + name = name[i+1:] + } + if is.Name != nil { + name = is.Name.Name + } + w.selectorFullPkg[name] = fpath + } + case token.CONST: + for _, sp := range d.Specs { + w.walkConst(sp.(*ast.ValueSpec)) + } + case token.TYPE: + for _, sp := range d.Specs { + w.walkTypeSpec(sp.(*ast.TypeSpec)) + } + case token.VAR: + for _, sp := range d.Specs { + w.walkVar(sp.(*ast.ValueSpec)) + } + default: + log.Fatalf("unknown token type %d in GenDecl", d.Tok) + } + case *ast.FuncDecl: + // Ignore. Handled in subsequent pass, by go/doc. + default: + log.Printf("unhandled %T, %#v\n", di, di) + printer.Fprint(os.Stderr, w.fset, di) + os.Stderr.Write([]byte("\n")) + } + } +} + +var constType = map[token.Token]string{ + token.INT: "ideal-int", + token.FLOAT: "ideal-float", + token.STRING: "ideal-string", + token.CHAR: "ideal-char", + token.IMAG: "ideal-imag", +} + +var varType = map[token.Token]string{ + token.INT: "int", + token.FLOAT: "float64", + token.STRING: "string", + token.CHAR: "rune", + token.IMAG: "complex128", +} + +var builtinTypes = []string{ + "bool", "byte", "complex64", "complex128", "error", "float32", "float64", + "int", "int8", "int16", "int32", "int64", "rune", "string", + "uint", "uint8", "uint16", "uint32", "uint64", "uintptr", +} + +func isBuiltinType(typ string) bool { + for _, v := range builtinTypes { + if v == typ { + return true + } + } + return false +} + +func constTypePriority(typ string) int { + switch typ { + case "complex128": + return 100 + case "ideal-imag": + return 99 + case "complex64": + return 98 + case "float64": + return 97 + case "ideal-float": + return 96 + case "float32": + return 95 + case "int64": + return 94 + case "int", "uint", "uintptr": + return 93 + case "ideal-int": + return 92 + case "int16", "uint16", "int8", "uint8", "byte": + return 91 + case "ideal-char": + return 90 + } + return 101 +} + +func (w *Walker) constRealType(typ string) string { + pos := strings.Index(typ, ".") + if pos >= 0 { + pkg := typ[:pos] + if pkg == "C" { + return "int" + } + typ = typ[pos+1:] + if p := w.findPackage(pkg); p != nil { + ret := p.findType(typ) + if ret != nil { + return w.nodeString(w.namelessType(ret)) + } + } + } else { + ret := w.curPackage.findType(typ) + if ret != nil { + return w.nodeString(w.namelessType(ret)) + } + } + return typ +} + +func (w *Walker) constValueType(vi interface{}) (string, error) { + switch v := vi.(type) { + case *ast.BasicLit: + litType, ok := constType[v.Kind] + if !ok { + return "", fmt.Errorf("unknown basic literal kind %#v", v) + } + return litType, nil + case *ast.UnaryExpr: + return w.constValueType(v.X) + case *ast.SelectorExpr: + lhs := w.nodeString(v.X) + rhs := w.nodeString(v.Sel) + //if CGO + if lhs == "C" { + return lhs + "." + rhs, nil + } + if p := w.findPackage(lhs); p != nil { + if ret, ok := p.consts[rhs]; ok { + return w.pkgRetType(p.name, ret.T), nil + } + } + return "", fmt.Errorf("unknown constant reference to %s.%s", lhs, rhs) + case *ast.Ident: + if v.Name == "iota" { + return "ideal-int", nil // hack. + } + if v.Name == "false" || v.Name == "true" { + return "bool", nil + } + if t, ok := w.curPackage.consts[v.Name]; ok { + return t.T, nil + } + return constDepPrefix + v.Name, nil + case *ast.BinaryExpr: + //== > < ! != >= <= + if v.Op == token.EQL || v.Op == token.LSS || v.Op == token.GTR || v.Op == token.NOT || + v.Op == token.NEQ || v.Op == token.LEQ || v.Op == token.GEQ { + return "bool", nil + } + left, err := w.constValueType(v.X) + if err != nil { + return "", err + } + if v.Op == token.SHL || v.Op == token.SHR { + return left, err + } + right, err := w.constValueType(v.Y) + if err != nil { + return "", err + } + //const left != right , one or two is ideal- + if left != right { + if strings.HasPrefix(left, constDepPrefix) && strings.HasPrefix(right, constDepPrefix) { + // Just pick one. + // e.g. text/scanner GoTokens const-dependency:ScanIdents, const-dependency:ScanFloats + return left, nil + } + lp := constTypePriority(w.constRealType(left)) + rp := constTypePriority(w.constRealType(right)) + if lp >= rp { + return left, nil + } else { + return right, nil + } + return "", fmt.Errorf("in BinaryExpr, unhandled type mismatch; left=%q, right=%q", left, right) + } + return left, nil + case *ast.CallExpr: + // Not a call, but a type conversion. + typ := w.nodeString(v.Fun) + switch typ { + case "complex": + return "complex128", nil + case "real", "imag": + return "float64", nil + } + return typ, nil + case *ast.ParenExpr: + return w.constValueType(v.X) + } + return "", fmt.Errorf("unknown const value type %T", vi) +} + +func (w *Walker) pkgRetType(pkg, ret string) string { + pkg = pkg[strings.LastIndex(pkg, "/")+1:] + if strings.HasPrefix(ret, "[]") { + return "[]" + w.pkgRetType(pkg, ret[2:]) + } + if strings.HasPrefix(ret, "*") { + return "*" + w.pkgRetType(pkg, ret[1:]) + } + if ast.IsExported(ret) { + return pkg + "." + ret + } + return ret +} + +func (w *Walker) findStructFieldType(st ast.Expr, name string) ast.Expr { + _, expr := w.findStructField(st, name) + return expr +} + +func (w *Walker) findStructFieldFunction(st ast.Expr, name string) (*TypeInfo, error) { + if s, ok := st.(*ast.StructType); ok { + for _, fi := range s.Fields.List { + typ := fi.Type + if fi.Names == nil { + switch v := typ.(type) { + case *ast.Ident: + if t := w.curPackage.findType(v.Name); t != nil { + return w.lookupFunction(v.Name, name) + } + case *ast.SelectorExpr: + pt := w.nodeString(typ) + pos := strings.Index(pt, ".") + if pos != -1 { + if p := w.findPackage(pt[:pos]); p != nil { + if t := p.findType(pt[pos+1:]); t != nil { + return w.lookupFunction(pt, name) + } + } + } + case *ast.StarExpr: + return w.findStructFieldFunction(v.X, name) + default: + if apiVerbose { + log.Printf("unable to handle embedded %T", typ) + } + } + } + } + } + return nil, nil +} + +func (w *Walker) findStructField(st ast.Expr, name string) (*ast.Ident, ast.Expr) { + if s, ok := st.(*ast.StructType); ok { + for _, fi := range s.Fields.List { + typ := fi.Type + for _, n := range fi.Names { + if n.Name == name { + return n, fi.Type + } + } + if fi.Names == nil { + switch v := typ.(type) { + case *ast.Ident: + if t := w.curPackage.findType(v.Name); t != nil { + if v.Name == name { + return v, v + } + id, expr := w.findStructField(t, name) + if id != nil { + return id, expr + } + } + case *ast.StarExpr: + switch vv := v.X.(type) { + case *ast.Ident: + if t := w.curPackage.findType(vv.Name); t != nil { + if vv.Name == name { + return vv, v.X + } + id, expr := w.findStructField(t, name) + if id != nil { + return id, expr + } + } + case *ast.SelectorExpr: + pt := w.nodeString(typ) + pos := strings.Index(pt, ".") + if pos != -1 { + if p := w.findPackage(pt[:pos]); p != nil { + if t := p.findType(pt[pos+1:]); t != nil { + return w.findStructField(t, name) + } + } + } + default: + if apiVerbose { + log.Printf("unable to handle embedded starexpr before %T", typ) + } + } + case *ast.SelectorExpr: + pt := w.nodeString(typ) + pos := strings.Index(pt, ".") + if pos != -1 { + if p := w.findPackage(pt[:pos]); p != nil { + if t := p.findType(pt[pos+1:]); t != nil { + return w.findStructField(t, name) + } + } + } + default: + if apiVerbose { + log.Printf("unable to handle embedded %T", typ) + } + } + } + } + } + return nil, nil +} + +func (w *Walker) lookupFunction(name, sel string) (*TypeInfo, error) { + name = strings.TrimLeft(name, "*") + if p := w.findPackage(name); p != nil { + fn := p.findCallFunc(sel) + if fn != nil { + return &TypeInfo{Kind: KindFunc, X: fn, Name: name + "." + sel, T: fn, Type: w.nodeString(w.namelessType(fn))}, nil + } + } + pos := strings.Index(name, ".") + if pos != -1 { + pkg := name[:pos] + typ := name[pos+1:] + if p := w.findPackage(pkg); p != nil { + if ident, fn := p.findMethod(typ, sel); fn != nil { + return &TypeInfo{Kind: KindMethod, X: fn, Name: name + "." + sel, T: ident, Type: w.nodeString(w.namelessType(fn))}, nil + } + } + return nil, fmt.Errorf("not lookup pkg type function pkg: %s, %s. %s. %s", name, pkg, typ, sel) + } + + //find local var.func() + if ns, nt, n := w.resolveName(name); n >= 0 { + var vt string + if nt != nil { + vt = w.nodeString(w.namelessType(nt)) + } else if ns != nil { + typ, err := w.varValueType(ns, n) + if err == nil { + vt = typ + } + } else { + typ := w.curPackage.findSelectorType(name) + if typ != nil { + vt = w.nodeString(w.namelessType(typ)) + } + } + if strings.HasPrefix(vt, "*") { + vt = vt[1:] + } + if vt == "error" && sel == "Error" { + return &TypeInfo{Kind: KindBuiltin, Name: "error.Error", Type: "()string"}, nil + } + if fn, ok := w.curPackage.functions[vt+"."+sel]; ok { + return &TypeInfo{Kind: KindMethod, X: fn.ft, Name: name + "." + sel, T: fn.ft, Type: w.nodeString(w.namelessType(fn))}, nil + } + } + if typ, ok := w.curPackage.structs[name]; ok { + if fn, ok := w.curPackage.functions[name+"."+sel]; ok { + return &TypeInfo{Kind: KindMethod, X: fn.ft, Name: name + "." + sel, T: fn.ft, Type: w.nodeString(w.namelessType(fn.ft))}, nil + } + if info, err := w.findStructFieldFunction(typ, sel); err == nil { + return info, nil + } + // struct field is type function + if ft := w.findStructFieldType(typ, sel); ft != nil { + typ, err := w.varValueType(ft, 0) + if err != nil { + typ = w.nodeString(ft) + } + return &TypeInfo{Kind: KindField, X: ft, Name: name + "." + sel, T: ft, Type: typ}, nil + } + } + + if ident, fn := w.curPackage.findMethod(name, sel); ident != nil && fn != nil { + return &TypeInfo{Kind: KindMethod, X: fn, Name: name + "." + sel, T: ident, Type: w.nodeString(w.namelessType(fn))}, nil + } + + if p := w.findPackage(name); p != nil { + fn := p.findCallFunc(sel) + if fn != nil { + return &TypeInfo{Kind: KindFunc, X: fn, Name: name + "." + sel, T: fn, Type: w.nodeString(w.namelessType(fn))}, nil + } + return nil, fmt.Errorf("not find pkg func0 %v.%v", p.name, sel) + } + return nil, fmt.Errorf("not lookup func %v.%v", name, sel) +} + +func (w *Walker) varFunctionType(name, sel string, index int) (string, error) { + name = strings.TrimLeft(name, "*") + pos := strings.Index(name, ".") + if pos != -1 { + pkg := name[:pos] + typ := name[pos+1:] + + if p := w.findPackage(pkg); p != nil { + _, fn := p.findMethod(typ, sel) + if fn != nil { + ret := funcRetType(fn, index) + if ret != nil { + return w.pkgRetType(p.name, w.nodeString(w.namelessType(ret))), nil + } + } + } + return "", fmt.Errorf("unknown pkg type function pkg: %s.%s.%s", pkg, typ, sel) + } + //find local var + if v, ok := w.localvar[name]; ok { + vt := v.T + if strings.HasPrefix(vt, "*") { + vt = vt[1:] + } + if vt == "error" && sel == "Error" { + return "string", nil + } + typ, err := w.varFunctionType(vt, sel, 0) + if err == nil { + return typ, nil + } + } + //find global var.func() + if ns, nt, n := w.resolveName(name); n >= 0 { + var vt string + if nt != nil { + vt = w.nodeString(w.namelessType(nt)) + } else if ns != nil { + typ, err := w.varValueType(ns, n) + if err == nil { + vt = typ + } + } else { + typ := w.curPackage.findSelectorType(name) + if typ != nil { + vt = w.nodeString(w.namelessType(typ)) + } + } + if strings.HasPrefix(vt, "*") { + vt = vt[1:] + } + if vt == "error" && sel == "Error" { + return "string", nil + } + if fn, ok := w.curPackage.functions[vt+"."+sel]; ok { + return w.nodeString(w.namelessType(funcRetType(fn.ft, index))), nil + } + } + if typ, ok := w.curPackage.structs[name]; ok { + if ft := w.findStructFieldType(typ, sel); ft != nil { + return w.varValueType(ft, index) + } + } + //find pkg.func() + if p := w.findPackage(name); p != nil { + typ := p.findCallType(sel, index) + if typ != nil { + return w.pkgRetType(p.name, w.nodeString(w.namelessType(typ))), nil + } + //log.Println("->", p.functions) + return "", fmt.Errorf("not find pkg func1 %v . %v", p.name, sel) + } + return "", fmt.Errorf("not find func %v.%v", name, sel) +} + +func (w *Walker) lookupSelector(name string, sel string) (*TypeInfo, error) { + name = strings.TrimLeft(name, "*") + pos := strings.Index(name, ".") + if pos != -1 { + pkg := name[:pos] + typ := name[pos+1:] + if p := w.findPackage(pkg); p != nil { + t := p.findType(typ) + if t != nil { + typ := w.findStructFieldType(t, sel) + if typ != nil { + return &TypeInfo{Kind: KindField, X: typ, Name: name + "." + sel, T: typ, Type: w.pkgRetType(p.name, w.nodeString(w.namelessType(typ)))}, nil + } + } + } + return nil, fmt.Errorf("lookup unknown pkg type selector pkg: %s.%s %s", pkg, typ, sel) + } + + if lv, ok := w.localvar[name]; ok { + return w.lookupSelector(lv.T, sel) + } + + vs, vt, n := w.resolveName(name) + if n >= 0 { + var typ string + if vt != nil { + typ = w.nodeString(w.namelessType(vt)) + } else { + typ, _ = w.varValueType(vs, n) + } + if strings.HasPrefix(typ, "*") { + typ = typ[1:] + } + //typ is type, find real type + for k, v := range w.curPackage.types { + if k == typ { + typ = w.nodeString(w.namelessType(v)) + } + } + pos := strings.Index(typ, ".") + if pos == -1 { + t := w.curPackage.findType(typ) + if t != nil { + typ := w.findStructFieldType(t, sel) + if typ != nil { + return &TypeInfo{Kind: KindField, X: typ, Name: name + "." + sel, T: typ, Type: w.nodeString(w.namelessType(typ))}, nil + } + } + } else { + name := typ[:pos] + typ = typ[pos+1:] + if p := w.findPackage(name); p != nil { + t := p.findType(typ) + if t != nil { + typ := w.findStructFieldType(t, sel) + if typ != nil { + return &TypeInfo{Kind: KindField, X: typ, Name: name + "." + sel, T: typ, Type: w.nodeString(w.namelessType(typ))}, nil + } + } + } + } + } + if p := w.findPackage(name); p != nil { + typ := p.findSelectorType(sel) + if typ != nil { + return &TypeInfo{Kind: KindType, X: typ, Name: name + "." + sel, T: typ, Type: w.pkgRetType(p.name, w.nodeString(w.namelessType(typ)))}, nil + } + } + t := w.curPackage.findType(name) + if t != nil { + typ := w.findStructFieldType(t, sel) + if typ != nil { + return &TypeInfo{Kind: KindField, X: typ, Name: name + "." + sel, T: typ, Type: w.nodeString(w.namelessType(typ))}, nil + } + } + if t, ok := w.curPackage.types[name]; ok { + return w.lookupSelector(w.nodeString(t), sel) + } + return nil, fmt.Errorf("unknown selector expr ident: %s.%s", name, sel) +} + +func (w *Walker) varSelectorType(name string, sel string) (string, error) { + name = strings.TrimLeft(name, "*") + pos := strings.Index(name, ".") + if pos != -1 { + pkg := name[:pos] + typ := name[pos+1:] + if p := w.findPackage(pkg); p != nil { + t := p.findType(typ) + if t != nil { + typ := w.findStructFieldType(t, sel) + if typ != nil { + return w.pkgRetType(pkg, w.nodeString(w.namelessType(typ))), nil + } + } + } + return "", fmt.Errorf("unknown pkg type selector pkg: %s.%s.%s", pkg, typ, sel) + } + //check local + if lv, ok := w.localvar[name]; ok { + return w.varSelectorType(lv.T, sel) + } + //check struct + if t := w.curPackage.findType(name); t != nil { + typ := w.findStructFieldType(t, sel) + if typ != nil { + return w.nodeString(w.namelessType(typ)), nil + } + } + //check var + vs, vt, n := w.resolveName(name) + if n >= 0 { + var typ string + if vt != nil { + typ = w.nodeString(w.namelessType(vt)) + } else { + typ, _ = w.varValueType(vs, n) + } + if strings.HasPrefix(typ, "*") { + typ = typ[1:] + } + //typ is type, find real type + for k, v := range w.curPackage.types { + if k == typ { + typ = w.nodeString(w.namelessType(v)) + } + } + pos := strings.Index(typ, ".") + if pos == -1 { + t := w.curPackage.findType(typ) + if t != nil { + typ := w.findStructFieldType(t, sel) + if typ != nil { + return w.nodeString(w.namelessType(typ)), nil + } + } + } else { + name := typ[:pos] + typ = typ[pos+1:] + if p := w.findPackage(name); p != nil { + t := p.findType(typ) + if t != nil { + typ := w.findStructFieldType(t, sel) + if typ != nil { + return w.nodeString(w.namelessType(typ)), nil + } + } + } + } + } + + if p := w.findPackage(name); p != nil { + typ := p.findSelectorType(sel) + if typ != nil { + return w.pkgRetType(p.name, w.nodeString(w.namelessType(typ))), nil + } + } + return "", fmt.Errorf("unknown var selector expr ident: %s.%s", name, sel) +} + +func (w *Walker) varValueType(vi ast.Expr, index int) (string, error) { + if vi == nil { + return "", nil + } + switch v := vi.(type) { + case *ast.BasicLit: + litType, ok := varType[v.Kind] + if !ok { + return "", fmt.Errorf("unknown basic literal kind %#v", v) + } + return litType, nil + case *ast.CompositeLit: + return w.nodeString(v.Type), nil + case *ast.FuncLit: + return w.nodeString(w.namelessType(v.Type)), nil + case *ast.InterfaceType: + return w.nodeString(v), nil + case *ast.Ellipsis: + typ, err := w.varValueType(v.Elt, index) + if err != nil { + return "", err + } + return "[]" + typ, nil + case *ast.StarExpr: + typ, err := w.varValueType(v.X, index) + if err != nil { + return "", err + } + return "*" + typ, err + case *ast.UnaryExpr: + if v.Op == token.AND { + typ, err := w.varValueType(v.X, index) + return "*" + typ, err + } + return "", fmt.Errorf("unknown unary expr: %#v", v) + case *ast.SelectorExpr: + switch st := v.X.(type) { + case *ast.Ident: + return w.varSelectorType(st.Name, v.Sel.Name) + case *ast.CallExpr: + typ, err := w.varValueType(v.X, index) + if err == nil { + if strings.HasPrefix(typ, "*") { + typ = typ[1:] + } + t := w.curPackage.findType(typ) + if st, ok := t.(*ast.StructType); ok { + for _, fi := range st.Fields.List { + for _, n := range fi.Names { + if n.Name == v.Sel.Name { + return w.varValueType(fi.Type, index) + } + } + } + } + } + case *ast.SelectorExpr: + typ, err := w.varValueType(v.X, index) + if err == nil { + return w.varSelectorType(typ, v.Sel.Name) + } + case *ast.IndexExpr: + typ, err := w.varValueType(st.X, index) + if err == nil { + if strings.HasPrefix(typ, "[]") { + return w.varSelectorType(typ[2:], v.Sel.Name) + } + } + case *ast.CompositeLit: + typ, err := w.varValueType(st.Type, 0) + if err == nil { + //log.Println(typ, v.Sel.Name) + t, err := w.varSelectorType(typ, v.Sel.Name) + if err == nil { + return t, nil + } + } + } + return "", fmt.Errorf("var unknown selector expr: %T %s.%s", v.X, w.nodeString(v.X), v.Sel) + case *ast.Ident: + if v.Name == "true" || v.Name == "false" { + return "bool", nil + } + if isBuiltinType(v.Name) { + return v.Name, nil + } + if lv, ok := w.localvar[v.Name]; ok { + return lv.T, nil + } + vt := w.curPackage.findType(v.Name) + if vt != nil { + if _, ok := vt.(*ast.StructType); ok { + return v.Name, nil + } + return w.nodeString(vt), nil + } + vs, _, n := w.resolveName(v.Name) + if n >= 0 { + return w.varValueType(vs, n) + } + return "", fmt.Errorf("unresolved identifier: %q", v.Name) + case *ast.BinaryExpr: + //== > < ! != >= <= + if v.Op == token.EQL || v.Op == token.LSS || v.Op == token.GTR || v.Op == token.NOT || + v.Op == token.NEQ || v.Op == token.LEQ || v.Op == token.GEQ { + return "bool", nil + } + left, err := w.varValueType(v.X, index) + if err != nil { + return "", err + } + right, err := w.varValueType(v.Y, index) + if err != nil { + return "", err + } + if left != right { + return "", fmt.Errorf("in BinaryExpr, unhandled type mismatch; left=%q, right=%q", left, right) + } + return left, nil + case *ast.ParenExpr: + return w.varValueType(v.X, index) + case *ast.CallExpr: + switch ft := v.Fun.(type) { + case *ast.ArrayType: + return w.nodeString(v.Fun), nil + case *ast.Ident: + switch ft.Name { + case "make": + return w.nodeString(w.namelessType(v.Args[0])), nil + case "new": + return "*" + w.nodeString(w.namelessType(v.Args[0])), nil + case "append": + return w.varValueType(v.Args[0], 0) + case "recover": + return "interface{}", nil + case "len", "cap", "copy": + return "int", nil + case "complex": + return "complex128", nil + case "real": + return "float64", nil + case "imag": + return "float64", nil + } + if isBuiltinType(ft.Name) { + return ft.Name, nil + } + typ := w.curPackage.findCallType(ft.Name, index) + if typ != nil { + return w.nodeString(w.namelessType(typ)), nil + } + //if local var type + if fn, ok := w.localvar[ft.Name]; ok { + typ := fn.T + if strings.HasPrefix(typ, "func(") { + expr, err := parser.ParseExpr(typ + "{}") + if err == nil { + if fl, ok := expr.(*ast.FuncLit); ok { + retType := funcRetType(fl.Type, index) + if retType != nil { + return w.nodeString(w.namelessType(retType)), nil + } + } + } + } + } + //if var is func() type + vs, _, n := w.resolveName(ft.Name) + if n >= 0 { + if vs != nil { + typ, err := w.varValueType(vs, n) + if err == nil { + if strings.HasPrefix(typ, "func(") { + expr, err := parser.ParseExpr(typ + "{}") + if err == nil { + if fl, ok := expr.(*ast.FuncLit); ok { + retType := funcRetType(fl.Type, index) + if retType != nil { + return w.nodeString(w.namelessType(retType)), nil + } + } + } + } + } + } + } + return "", fmt.Errorf("unknown funcion %s %s", w.curPackageName, ft.Name) + case *ast.SelectorExpr: + typ, err := w.varValueType(ft.X, index) + if err == nil { + if strings.HasPrefix(typ, "*") { + typ = typ[1:] + } + retType := w.curPackage.findCallType(typ+"."+ft.Sel.Name, index) + if retType != nil { + return w.nodeString(w.namelessType(retType)), nil + } + } + switch st := ft.X.(type) { + case *ast.Ident: + return w.varFunctionType(st.Name, ft.Sel.Name, index) + case *ast.CallExpr: + typ, err := w.varValueType(st, 0) + if err != nil { + return "", err + } + return w.varFunctionType(typ, ft.Sel.Name, index) + case *ast.SelectorExpr: + typ, err := w.varValueType(st, index) + if err == nil { + return w.varFunctionType(typ, ft.Sel.Name, index) + } + case *ast.IndexExpr: + typ, err := w.varValueType(st.X, index) + if err == nil { + if strings.HasPrefix(typ, "[]") { + return w.varFunctionType(typ[2:], ft.Sel.Name, index) + } + } + case *ast.TypeAssertExpr: + typ := w.nodeString(w.namelessType(st.Type)) + typ = strings.TrimLeft(typ, "*") + return w.varFunctionType(typ, ft.Sel.Name, index) + } + return "", fmt.Errorf("unknown var function selector %v %T", w.nodeString(ft.X), ft.X) + case *ast.FuncLit: + retType := funcRetType(ft.Type, index) + if retType != nil { + return w.nodeString(w.namelessType(retType)), nil + } + case *ast.CallExpr: + typ, err := w.varValueType(v.Fun, 0) + if err == nil && strings.HasPrefix(typ, "func(") { + expr, err := parser.ParseExpr(typ + "{}") + if err == nil { + if fl, ok := expr.(*ast.FuncLit); ok { + retType := funcRetType(fl.Type, index) + if retType != nil { + return w.nodeString(w.namelessType(retType)), nil + } + } + } + } + } + return "", fmt.Errorf("not a known function %T %v", v.Fun, w.nodeString(v.Fun)) + case *ast.MapType: + return fmt.Sprintf("map[%s](%s)", w.nodeString(w.namelessType(v.Key)), w.nodeString(w.namelessType(v.Value))), nil + case *ast.ArrayType: + return fmt.Sprintf("[]%s", w.nodeString(w.namelessType(v.Elt))), nil + case *ast.FuncType: + return w.nodeString(w.namelessType(v)), nil + case *ast.IndexExpr: + typ, err := w.varValueType(v.X, index) + typ = strings.TrimLeft(typ, "*") + if err == nil { + if index == 0 { + return typ, nil + } else if index == 1 { + return "bool", nil + } + if strings.HasPrefix(typ, "[]") { + return typ[2:], nil + } else if strings.HasPrefix(typ, "map[") { + node, err := parser.ParseExpr(typ + "{}") + if err == nil { + if cl, ok := node.(*ast.CompositeLit); ok { + if m, ok := cl.Type.(*ast.MapType); ok { + return w.nodeString(w.namelessType(m.Value)), nil + } + } + } + } + } + return "", fmt.Errorf("unknown index %v %v %v %v", typ, v.X, index, err) + case *ast.SliceExpr: + return w.varValueType(v.X, index) + case *ast.ChanType: + typ, err := w.varValueType(v.Value, index) + if err == nil { + if v.Dir == ast.RECV { + return "<-chan " + typ, nil + } else if v.Dir == ast.SEND { + return "chan<- " + typ, nil + } + return "chan " + typ, nil + } + case *ast.TypeAssertExpr: + if index == 1 { + return "bool", nil + } + return w.nodeString(w.namelessType(v.Type)), nil + default: + return "", fmt.Errorf("unknown value type %v %T", w.nodeString(vi), vi) + } + //panic("unreachable") + return "", fmt.Errorf("unreachable value type %v %T", vi, vi) +} + +// resolveName finds a top-level node named name and returns the node +// v and its type t, if known. +func (w *Walker) resolveName(name string) (v ast.Expr, t interface{}, n int) { + for _, file := range w.curPackage.apkg.Files { + for _, di := range file.Decls { + switch d := di.(type) { + case *ast.GenDecl: + switch d.Tok { + case token.VAR: + for _, sp := range d.Specs { + vs := sp.(*ast.ValueSpec) + for i, vname := range vs.Names { + if vname.Name == name { + if len(vs.Values) == 1 { + return vs.Values[0], vs.Type, i + } + return nil, vs.Type, i + } + } + } + } + } + } + } + return nil, nil, -1 +} + +// constDepPrefix is a magic prefix that is used by constValueType +// and walkConst to signal that a type isn't known yet. These are +// resolved at the end of walking of a package's files. +const constDepPrefix = "const-dependency:" + +func (w *Walker) walkConst(vs *ast.ValueSpec) { + for _, ident := range vs.Names { + if !w.isExtract(ident.Name) { + continue + } + litType := "" + if vs.Type != nil { + litType = w.nodeString(vs.Type) + } else { + litType = w.lastConstType + if vs.Values != nil { + if len(vs.Values) != 1 { + log.Fatalf("const %q, values: %#v", ident.Name, vs.Values) + } + var err error + litType, err = w.constValueType(vs.Values[0]) + if err != nil { + if apiVerbose { + log.Printf("unknown kind in const %q (%T): %v", ident.Name, vs.Values[0], err) + } + litType = "unknown-type" + } + } + } + if strings.HasPrefix(litType, constDepPrefix) { + dep := litType[len(constDepPrefix):] + w.constDep[ident.Name] = &ExprType{T: dep, X: ident} + continue + } + if litType == "" { + if apiVerbose { + log.Printf("unknown kind in const %q", ident.Name) + } + continue + } + w.lastConstType = litType + + w.curPackage.consts[ident.Name] = &ExprType{T: litType, X: ident} + + if isExtract(ident.Name) { + w.emitFeature(fmt.Sprintf("const %s %s", ident, litType), ident.Pos()) + } + } +} + +func (w *Walker) resolveConstantDeps() { + var findConstType func(string) string + findConstType = func(ident string) string { + if dep, ok := w.constDep[ident]; ok { + return findConstType(dep.T) + } + if t, ok := w.curPackage.consts[ident]; ok { + return t.T + } + return "" + } + for ident, info := range w.constDep { + if !isExtract(ident) { + continue + } + t := findConstType(ident) + if t == "" { + if apiVerbose { + log.Printf("failed to resolve constant %q", ident) + } + continue + } + w.curPackage.consts[ident] = &ExprType{T: t, X: info.X} + w.emitFeature(fmt.Sprintf("const %s %s", ident, t), info.X.Pos()) + } +} + +func (w *Walker) walkVar(vs *ast.ValueSpec) { + if vs.Type != nil { + typ := w.nodeString(vs.Type) + for _, ident := range vs.Names { + w.curPackage.vars[ident.Name] = &ExprType{T: typ, X: ident} + if isExtract(ident.Name) { + w.emitFeature(fmt.Sprintf("var %s %s", ident, typ), ident.Pos()) + } + } + } else if len(vs.Names) == len(vs.Values) { + for n, ident := range vs.Names { + if !w.isExtract(ident.Name) { + continue + } + typ, err := w.varValueType(vs.Values[n], n) + if err != nil { + if apiVerbose { + log.Printf("unknown type of variable0 %q, type %T, error = %v, pos=%s", + ident.Name, vs.Values[n], err, w.fset.Position(vs.Pos())) + } + typ = "unknown-type" + } + w.curPackage.vars[ident.Name] = &ExprType{T: typ, X: ident} + if isExtract(ident.Name) { + w.emitFeature(fmt.Sprintf("var %s %s", ident, typ), ident.Pos()) + } + } + } else if len(vs.Values) == 1 { + for n, ident := range vs.Names { + if !w.isExtract(ident.Name) { + continue + } + typ, err := w.varValueType(vs.Values[0], n) + if err != nil { + if apiVerbose { + log.Printf("unknown type of variable1 %q, type %T, error = %v, pos=%s", + ident.Name, vs.Values[0], err, w.fset.Position(vs.Pos())) + } + typ = "unknown-type" + } + w.curPackage.vars[ident.Name] = &ExprType{T: typ, X: ident} + if isExtract(ident.Name) { + w.emitFeature(fmt.Sprintf("var %s %s", ident, typ), ident.Pos()) + } + } + } +} + +func (w *Walker) nodeString(node interface{}) string { + if node == nil { + return "" + } + var b bytes.Buffer + printer.Fprint(&b, w.fset, node) + return b.String() +} + +func (w *Walker) nodeDebug(node interface{}) string { + if node == nil { + return "" + } + var b bytes.Buffer + ast.Fprint(&b, w.fset, node, nil) + return b.String() +} + +func (w *Walker) noteInterface(name string, it *ast.InterfaceType) { + w.interfaces[pkgSymbol{w.curPackageName, name}] = it +} + +func (w *Walker) walkTypeSpec(ts *ast.TypeSpec) { + name := ts.Name.Name + if !isExtract(name) { + return + } + switch t := ts.Type.(type) { + case *ast.StructType: + w.walkStructType(name, t) + case *ast.InterfaceType: + w.walkInterfaceType(name, t) + default: + w.emitFeature(fmt.Sprintf("type %s %s", name, w.nodeString(ts.Type)), t.Pos()-token.Pos(len(name)+1)) + } +} + +func (w *Walker) walkStructType(name string, t *ast.StructType) { + typeStruct := fmt.Sprintf("type %s struct", name) + w.emitFeature(typeStruct, t.Pos()-token.Pos(len(name)+1)) + pop := w.pushScope(typeStruct) + defer pop() + for _, f := range t.Fields.List { + typ := f.Type + for _, name := range f.Names { + if isExtract(name.Name) { + w.emitFeature(fmt.Sprintf("%s %s", name, w.nodeString(w.namelessType(typ))), name.Pos()) + } + } + if f.Names == nil { + switch v := typ.(type) { + case *ast.Ident: + if isExtract(v.Name) { + w.emitFeature(fmt.Sprintf("embedded %s", v.Name), v.Pos()) + } + case *ast.StarExpr: + switch vv := v.X.(type) { + case *ast.Ident: + if isExtract(vv.Name) { + w.emitFeature(fmt.Sprintf("embedded *%s", vv.Name), vv.Pos()) + } + case *ast.SelectorExpr: + w.emitFeature(fmt.Sprintf("embedded %s", w.nodeString(typ)), v.Pos()) + default: + log.Fatalf("unable to handle embedded starexpr before %T", typ) + } + case *ast.SelectorExpr: + w.emitFeature(fmt.Sprintf("embedded %s", w.nodeString(typ)), v.Pos()) + default: + if apiVerbose { + log.Printf("unable to handle embedded %T", typ) + } + } + } + } +} + +// typeMethod is a method of an interface. +type typeMethod struct { + name string // "Read" + sig string // "([]byte) (int, error)", from funcSigString + ft *ast.FuncType + pos token.Pos + recv ast.Expr +} + +// interfaceMethods returns the expanded list of exported methods for an interface. +// The boolean complete reports whether the list contains all methods (that is, the +// interface has no unexported methods). +// pkg is the complete package name ("net/http") +// iname is the interface name. +func (w *Walker) interfaceMethods(pkg, iname string) (methods []typeMethod, complete bool) { + t, ok := w.interfaces[pkgSymbol{pkg, iname}] + if !ok { + if apiVerbose { + log.Printf("failed to find interface %s.%s", pkg, iname) + } + return + } + + complete = true + for _, f := range t.Methods.List { + typ := f.Type + switch tv := typ.(type) { + case *ast.FuncType: + for _, mname := range f.Names { + if isExtract(mname.Name) { + ft := typ.(*ast.FuncType) + methods = append(methods, typeMethod{ + name: mname.Name, + sig: w.funcSigString(ft), + ft: ft, + pos: f.Pos(), + }) + } else { + complete = false + } + } + case *ast.Ident: + embedded := typ.(*ast.Ident).Name + if embedded == "error" { + methods = append(methods, typeMethod{ + name: "Error", + sig: "() string", + ft: &ast.FuncType{ + Params: nil, + Results: &ast.FieldList{ + List: []*ast.Field{ + &ast.Field{ + Type: &ast.Ident{ + Name: "string", + }, + }, + }, + }, + }, + pos: f.Pos(), + }) + continue + } + if !isExtract(embedded) { + log.Fatalf("unexported embedded interface %q in exported interface %s.%s; confused", + embedded, pkg, iname) + } + m, c := w.interfaceMethods(pkg, embedded) + methods = append(methods, m...) + complete = complete && c + case *ast.SelectorExpr: + lhs := w.nodeString(tv.X) + rhs := w.nodeString(tv.Sel) + fpkg, ok := w.selectorFullPkg[lhs] + if !ok { + log.Fatalf("can't resolve selector %q in interface %s.%s", lhs, pkg, iname) + } + m, c := w.interfaceMethods(fpkg, rhs) + methods = append(methods, m...) + complete = complete && c + default: + log.Fatalf("unknown type %T in interface field", typ) + } + } + return +} + +func (w *Walker) walkInterfaceType(name string, t *ast.InterfaceType) { + methNames := []string{} + pop := w.pushScope("type " + name + " interface") + methods, complete := w.interfaceMethods(w.curPackageName, name) + w.packageMap[w.curPackageName].interfaceMethods[name] = methods + for _, m := range methods { + methNames = append(methNames, m.name) + w.emitFeature(fmt.Sprintf("%s%s", m.name, m.sig), m.pos) + } + if !complete { + // The method set has unexported methods, so all the + // implementations are provided by the same package, + // so the method set can be extended. Instead of recording + // the full set of names (below), record only that there were + // unexported methods. (If the interface shrinks, we will notice + // because a method signature emitted during the last loop, + // will disappear.) + w.emitFeature("unexported methods", 0) + } + pop() + + if !complete { + return + } + + sort.Strings(methNames) + if len(methNames) == 0 { + w.emitFeature(fmt.Sprintf("type %s interface {}", name), t.Pos()-token.Pos(len(name)+1)) + } else { + w.emitFeature(fmt.Sprintf("type %s interface { %s }", name, strings.Join(methNames, ", ")), t.Pos()-token.Pos(len(name)+1)) + } +} + +func baseTypeName(x ast.Expr) (name string, imported bool) { + switch t := x.(type) { + case *ast.Ident: + return t.Name, false + case *ast.SelectorExpr: + if _, ok := t.X.(*ast.Ident); ok { + // only possible for qualified type names; + // assume type is imported + return t.Sel.Name, true + } + case *ast.StarExpr: + return baseTypeName(t.X) + } + return +} + +func (w *Walker) peekFuncDecl(f *ast.FuncDecl) { + var fname = f.Name.Name + var recv ast.Expr + if f.Recv != nil { + recvTypeName, imp := baseTypeName(f.Recv.List[0].Type) + if imp { + return + } + fname = recvTypeName + "." + f.Name.Name + recv = f.Recv.List[0].Type + } + // Record return type for later use. + //if f.Type.Results != nil && len(f.Type.Results.List) >= 1 { + // record all function + w.curPackage.functions[fname] = typeMethod{ + name: fname, + sig: w.funcSigString(f.Type), + ft: f.Type, + pos: f.Pos(), + recv: recv, + } + //} +} + +func (w *Walker) walkFuncDecl(f *ast.FuncDecl) { + if !w.isExtract(f.Name.Name) { + return + } + if f.Recv != nil { + // Method. + recvType := w.nodeString(f.Recv.List[0].Type) + keep := isExtract(recvType) || + (strings.HasPrefix(recvType, "*") && + isExtract(recvType[1:])) + if !keep { + return + } + w.emitFeature(fmt.Sprintf("method (%s) %s%s", recvType, f.Name.Name, w.funcSigString(f.Type)), f.Name.Pos()) + return + } + // Else, a function + w.emitFeature(fmt.Sprintf("func %s%s", f.Name.Name, w.funcSigString(f.Type)), f.Name.Pos()) +} + +func (w *Walker) funcSigString(ft *ast.FuncType) string { + var b bytes.Buffer + writeField := func(b *bytes.Buffer, f *ast.Field) { + if n := len(f.Names); n > 1 { + for i := 0; i < n; i++ { + if i > 0 { + b.WriteString(", ") + } + b.WriteString(w.nodeString(w.namelessType(f.Type))) + } + } else { + b.WriteString(w.nodeString(w.namelessType(f.Type))) + } + } + b.WriteByte('(') + if ft.Params != nil { + for i, f := range ft.Params.List { + if i > 0 { + b.WriteString(", ") + } + writeField(&b, f) + } + } + b.WriteByte(')') + if ft.Results != nil { + nr := 0 + for _, f := range ft.Results.List { + if n := len(f.Names); n > 1 { + nr += n + } else { + nr++ + } + } + if nr > 0 { + b.WriteByte(' ') + if nr > 1 { + b.WriteByte('(') + } + for i, f := range ft.Results.List { + if i > 0 { + b.WriteString(", ") + } + writeField(&b, f) + } + if nr > 1 { + b.WriteByte(')') + } + } + } + return b.String() +} + +// namelessType returns a type node that lacks any variable names. +func (w *Walker) namelessType(t interface{}) interface{} { + ft, ok := t.(*ast.FuncType) + if !ok { + return t + } + return &ast.FuncType{ + Params: w.namelessFieldList(ft.Params), + Results: w.namelessFieldList(ft.Results), + } +} + +// namelessFieldList returns a deep clone of fl, with the cloned fields +// lacking names. +func (w *Walker) namelessFieldList(fl *ast.FieldList) *ast.FieldList { + fl2 := &ast.FieldList{} + if fl != nil { + for _, f := range fl.List { + n := len(f.Names) + if n >= 1 { + for i := 0; i < n; i++ { + fl2.List = append(fl2.List, w.namelessField(f)) + } + } else { + fl2.List = append(fl2.List, w.namelessField(f)) + } + } + } + return fl2 +} + +// namelessField clones f, but not preserving the names of fields. +// (comments and tags are also ignored) +func (w *Walker) namelessField(f *ast.Field) *ast.Field { + return &ast.Field{ + Type: f.Type, + } +} + +func (w *Walker) emitFeature(feature string, pos token.Pos) { + if !w.wantedPkg[w.curPackage.name] { + return + } + more := strings.Index(feature, "\n") + if more != -1 { + if len(feature) <= 1024 { + feature = strings.Replace(feature, "\n", " ", 1) + feature = strings.Replace(feature, "\n", ";", -1) + feature = strings.Replace(feature, "\t", " ", -1) + } else { + feature = feature[:more] + " ...more" + if apiVerbose { + log.Printf("feature contains newlines: %v, %s", feature, w.fset.Position(pos)) + } + } + } + f := strings.Join(w.scope, w.sep) + w.sep + feature + + if _, dup := w.curPackage.features[f]; dup { + return + } + w.curPackage.features[f] = pos +} + +func strListContains(l []string, s string) bool { + for _, v := range l { + if v == s { + return true + } + } + return false +} + +const goosList = "darwin freebsd linux netbsd openbsd plan9 windows " +const goarchList = "386 amd64 arm " + +// goodOSArchFile returns false if the name contains a $GOOS or $GOARCH +// suffix which does not match the current system. +// The recognized name formats are: +// +// name_$(GOOS).* +// name_$(GOARCH).* +// name_$(GOOS)_$(GOARCH).* +// name_$(GOOS)_test.* +// name_$(GOARCH)_test.* +// name_$(GOOS)_$(GOARCH)_test.* +// +func isOSArchFile(ctxt *build.Context, name string) bool { + if dot := strings.Index(name, "."); dot != -1 { + name = name[:dot] + } + l := strings.Split(name, "_") + if n := len(l); n > 0 && l[n-1] == "test" { + l = l[:n-1] + } + n := len(l) + if n >= 2 && knownOS[l[n-2]] && knownArch[l[n-1]] { + return l[n-2] == ctxt.GOOS && l[n-1] == ctxt.GOARCH + } + if n >= 1 && knownOS[l[n-1]] { + return l[n-1] == ctxt.GOOS + } + if n >= 1 && knownArch[l[n-1]] { + return l[n-1] == ctxt.GOARCH + } + return false +} + +var knownOS = make(map[string]bool) +var knownArch = make(map[string]bool) + +func init() { + for _, v := range strings.Fields(goosList) { + knownOS[v] = true + } + for _, v := range strings.Fields(goarchList) { + knownArch[v] = true + } +} diff --git a/vendor/github.com/visualfc/gotools/goimports/fix.go b/vendor/github.com/visualfc/gotools/goimports/fix.go new file mode 100644 index 0000000..0fabc77 --- /dev/null +++ b/vendor/github.com/visualfc/gotools/goimports/fix.go @@ -0,0 +1,394 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package goimports + +import ( + "fmt" + "go/ast" + "go/build" + "go/parser" + "go/token" + "os" + "path" + "path/filepath" + "strings" + "sync" + + "github.com/visualfc/gotools/stdlib" + + "golang.org/x/tools/go/ast/astutil" +) + +// importToGroup is a list of functions which map from an import path to +// a group number. +var importToGroup = []func(importPath string) (num int, ok bool){ + func(importPath string) (num int, ok bool) { + if strings.HasPrefix(importPath, "appengine") { + return 2, true + } + return + }, + func(importPath string) (num int, ok bool) { + if strings.Contains(importPath, ".") { + return 1, true + } + return + }, +} + +func importGroup(importPath string) int { + for _, fn := range importToGroup { + if n, ok := fn(importPath); ok { + return n + } + } + return 0 +} + +func fixImports(fset *token.FileSet, f *ast.File) (added []string, err error) { + // refs are a set of possible package references currently unsatisfied by imports. + // first key: either base package (e.g. "fmt") or renamed package + // second key: referenced package symbol (e.g. "Println") + refs := make(map[string]map[string]bool) + + // decls are the current package imports. key is base package or renamed package. + decls := make(map[string]*ast.ImportSpec) + + // collect potential uses of packages. + var visitor visitFn + visitor = visitFn(func(node ast.Node) ast.Visitor { + if node == nil { + return visitor + } + switch v := node.(type) { + case *ast.ImportSpec: + if v.Name != nil { + decls[v.Name.Name] = v + } else { + local := importPathToName(strings.Trim(v.Path.Value, `\"`)) + decls[local] = v + } + case *ast.SelectorExpr: + xident, ok := v.X.(*ast.Ident) + if !ok { + break + } + if xident.Obj != nil { + // if the parser can resolve it, it's not a package ref + break + } + pkgName := xident.Name + if refs[pkgName] == nil { + refs[pkgName] = make(map[string]bool) + } + if decls[pkgName] == nil { + refs[pkgName][v.Sel.Name] = true + } + } + return visitor + }) + ast.Walk(visitor, f) + + // Search for imports matching potential package references. + searches := 0 + type result struct { + ipath string + name string + err error + } + results := make(chan result) + for pkgName, symbols := range refs { + if len(symbols) == 0 { + continue // skip over packages already imported + } + go func(pkgName string, symbols map[string]bool) { + ipath, rename, err := findImport(pkgName, symbols) + r := result{ipath: ipath, err: err} + if rename { + r.name = pkgName + } + results <- r + }(pkgName, symbols) + searches++ + } + for i := 0; i < searches; i++ { + result := <-results + if result.err != nil { + return nil, result.err + } + if result.ipath != "" { + if result.name != "" { + astutil.AddNamedImport(fset, f, result.name, result.ipath) + } else { + astutil.AddImport(fset, f, result.ipath) + } + added = append(added, result.ipath) + } + } + + // Nil out any unused ImportSpecs, to be removed in following passes + unusedImport := map[string]bool{} + for pkg, is := range decls { + if refs[pkg] == nil && pkg != "_" && pkg != "." { + unusedImport[strings.Trim(is.Path.Value, `"`)] = true + } + } + for ipath := range unusedImport { + if ipath == "C" { + // Don't remove cgo stuff. + continue + } + astutil.DeleteImport(fset, f, ipath) + } + + return added, nil +} + +// importPathToName returns the package name for the given import path. +var importPathToName = importPathToNameGoPath + +// importPathToNameBasic assumes the package name is the base of import path. +func importPathToNameBasic(importPath string) (packageName string) { + return path.Base(importPath) +} + +// importPathToNameGoPath finds out the actual package name, as declared in its .go files. +// If there's a problem, it falls back to using importPathToNameBasic. +func importPathToNameGoPath(importPath string) (packageName string) { + if stdlib.IsStdPkg(importPath) { + return path.Base(importPath) + } + if buildPkg, err := build.Import(importPath, "", 0); err == nil { + return buildPkg.Name + } else { + return importPathToNameBasic(importPath) + } +} + +type pkg struct { + importpath string // full pkg import path, e.g. "net/http" + dir string // absolute file path to pkg directory e.g. "/usr/lib/go/src/fmt" +} + +var pkgIndexOnce sync.Once + +var pkgIndex struct { + sync.Mutex + m map[string][]pkg // shortname => []pkg, e.g "http" => "net/http" +} + +// gate is a semaphore for limiting concurrency. +type gate chan struct{} + +func (g gate) enter() { g <- struct{}{} } +func (g gate) leave() { <-g } + +// fsgate protects the OS & filesystem from too much concurrency. +// Too much disk I/O -> too many threads -> swapping and bad scheduling. +var fsgate = make(gate, 8) + +func loadPkgIndex() { + pkgIndex.Lock() + pkgIndex.m = make(map[string][]pkg) + pkgIndex.Unlock() + + var wg sync.WaitGroup + for _, path := range build.Default.SrcDirs() { + fsgate.enter() + f, err := os.Open(path) + if err != nil { + fsgate.leave() + fmt.Fprint(os.Stderr, err) + continue + } + children, err := f.Readdir(-1) + f.Close() + fsgate.leave() + if err != nil { + fmt.Fprint(os.Stderr, err) + continue + } + for _, child := range children { + if child.IsDir() { + wg.Add(1) + go func(path, name string) { + defer wg.Done() + loadPkg(&wg, path, name) + }(path, child.Name()) + } + } + } + wg.Wait() +} + +func loadPkg(wg *sync.WaitGroup, root, pkgrelpath string) { + importpath := filepath.ToSlash(pkgrelpath) + dir := filepath.Join(root, importpath) + + fsgate.enter() + defer fsgate.leave() + pkgDir, err := os.Open(dir) + if err != nil { + return + } + children, err := pkgDir.Readdir(-1) + pkgDir.Close() + if err != nil { + return + } + // hasGo tracks whether a directory actually appears to be a + // Go source code directory. If $GOPATH == $HOME, and + // $HOME/src has lots of other large non-Go projects in it, + // then the calls to importPathToName below can be expensive. + hasGo := false + for _, child := range children { + name := child.Name() + if name == "" { + continue + } + if c := name[0]; c == '.' || ('0' <= c && c <= '9') { + continue + } + if strings.HasSuffix(name, ".go") { + hasGo = true + } + if child.IsDir() { + wg.Add(1) + go func(root, name string) { + defer wg.Done() + loadPkg(wg, root, name) + }(root, filepath.Join(importpath, name)) + } + } + if hasGo { + shortName := importPathToName(importpath) + pkgIndex.Lock() + pkgIndex.m[shortName] = append(pkgIndex.m[shortName], pkg{ + importpath: importpath, + dir: dir, + }) + pkgIndex.Unlock() + } + +} + +// loadExports returns a list exports for a package. +var loadExports = loadExportsGoPath + +func loadExportsGoPath(dir string) map[string]bool { + exports := make(map[string]bool) + buildPkg, err := build.ImportDir(dir, 0) + if err != nil { + if strings.Contains(err.Error(), "no buildable Go source files in") { + return nil + } + fmt.Fprintf(os.Stderr, "could not import %q: %v\n", dir, err) + return nil + } + fset := token.NewFileSet() + for _, files := range [...][]string{buildPkg.GoFiles, buildPkg.CgoFiles} { + for _, file := range files { + f, err := parser.ParseFile(fset, filepath.Join(dir, file), nil, 0) + if err != nil { + fmt.Fprintf(os.Stderr, "could not parse %q: %v\n", file, err) + continue + } + for name := range f.Scope.Objects { + if ast.IsExported(name) { + exports[name] = true + } + } + } + } + return exports +} + +// findImport searches for a package with the given symbols. +// If no package is found, findImport returns "". +// Declared as a variable rather than a function so goimports can be easily +// extended by adding a file with an init function. +var findImport = findImportGoPath + +func findImportGoPath(pkgName string, symbols map[string]bool) (string, bool, error) { + // Fast path for the standard library. + // In the common case we hopefully never have to scan the GOPATH, which can + // be slow with moving disks. + if pkg, rename, ok := findImportStdlib(pkgName, symbols); ok { + return pkg, rename, nil + } + + // TODO(sameer): look at the import lines for other Go files in the + // local directory, since the user is likely to import the same packages + // in the current Go file. Return rename=true when the other Go files + // use a renamed package that's also used in the current file. + + pkgIndexOnce.Do(loadPkgIndex) + + // Collect exports for packages with matching names. + var wg sync.WaitGroup + var pkgsMu sync.Mutex // guards pkgs + // full importpath => exported symbol => True + // e.g. "net/http" => "Client" => True + pkgs := make(map[string]map[string]bool) + pkgIndex.Lock() + for _, pkg := range pkgIndex.m[pkgName] { + wg.Add(1) + go func(importpath, dir string) { + defer wg.Done() + exports := loadExports(dir) + if exports != nil { + pkgsMu.Lock() + pkgs[importpath] = exports + pkgsMu.Unlock() + } + }(pkg.importpath, pkg.dir) + } + pkgIndex.Unlock() + wg.Wait() + + // Filter out packages missing required exported symbols. + for symbol := range symbols { + for importpath, exports := range pkgs { + if !exports[symbol] { + delete(pkgs, importpath) + } + } + } + if len(pkgs) == 0 { + return "", false, nil + } + + // If there are multiple candidate packages, the shortest one wins. + // This is a heuristic to prefer the standard library (e.g. "bytes") + // over e.g. "github.com/foo/bar/bytes". + shortest := "" + for importPath := range pkgs { + if shortest == "" || len(importPath) < len(shortest) { + shortest = importPath + } + } + return shortest, false, nil +} + +type visitFn func(node ast.Node) ast.Visitor + +func (fn visitFn) Visit(node ast.Node) ast.Visitor { + return fn(node) +} + +func findImportStdlib(shortPkg string, symbols map[string]bool) (importPath string, rename, ok bool) { + for symbol := range symbols { + path := stdlib.Symbols[shortPkg+"."+symbol] + if path == "" { + return "", false, false + } + if importPath != "" && importPath != path { + // Ambiguous. Symbols pointed to different things. + return "", false, false + } + importPath = path + } + return importPath, false, importPath != "" +} diff --git a/vendor/github.com/visualfc/gotools/goimports/goimports.go b/vendor/github.com/visualfc/gotools/goimports/goimports.go new file mode 100644 index 0000000..0a9b108 --- /dev/null +++ b/vendor/github.com/visualfc/gotools/goimports/goimports.go @@ -0,0 +1,206 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package goimports + +import ( + "bytes" + "fmt" + "go/parser" + "go/printer" + "go/scanner" + "go/token" + "io" + "io/ioutil" + "os" + "os/exec" + "path/filepath" + "runtime" + "strings" + "sync" + + "github.com/visualfc/gotools/command" +) + +var Command = &command.Command{ + Run: runGoimports, + UsageLine: "goimports [flags] [path ...]", + Short: "updates go import lines", + Long: `goimports updates your Go import lines, adding missing ones and removing unreferenced ones. `, +} + +var ( + goimportsList bool + goimportsWrite bool + goimportsDiff bool + goimportsAllErrors bool + + // layout control + goimportsComments bool + goimportsTabWidth int + goimportsTabIndent bool +) + +//func init +func init() { + Command.Flag.BoolVar(&goimportsList, "l", false, "list files whose formatting differs from goimport's") + Command.Flag.BoolVar(&goimportsWrite, "w", false, "write result to (source) file instead of stdout") + Command.Flag.BoolVar(&goimportsDiff, "d", false, "display diffs instead of rewriting files") + Command.Flag.BoolVar(&goimportsAllErrors, "e", false, "report all errors (not just the first 10 on different lines)") + + // layout control + Command.Flag.BoolVar(&goimportsComments, "comments", true, "print comments") + Command.Flag.IntVar(&goimportsTabWidth, "tabwidth", 8, "tab width") + Command.Flag.BoolVar(&goimportsTabIndent, "tabs", true, "indent with tabs") +} + +var ( + fileSet = token.NewFileSet() // per process FileSet + exitCode = 0 + + initModesOnce sync.Once // guards calling initModes + parserMode parser.Mode + printerMode printer.Mode + options *Options +) + +func report(err error) { + scanner.PrintError(os.Stderr, err) + exitCode = 2 +} + +func runGoimports(cmd *command.Command, args []string) error { + runtime.GOMAXPROCS(runtime.NumCPU()) + + if goimportsTabWidth < 0 { + fmt.Fprintf(os.Stderr, "negative tabwidth %d\n", goimportsTabWidth) + exitCode = 2 + os.Exit(exitCode) + return os.ErrInvalid + } + + options = &Options{ + TabWidth: goimportsTabWidth, + TabIndent: goimportsTabIndent, + Comments: goimportsComments, + AllErrors: goimportsAllErrors, + Fragment: true, + } + + if len(args) == 0 { + if err := processFile("", os.Stdin, os.Stdout, true); err != nil { + report(err) + } + } else { + for _, path := range args { + switch dir, err := os.Stat(path); { + case err != nil: + report(err) + case dir.IsDir(): + walkDir(path) + default: + if err := processFile(path, nil, os.Stdout, false); err != nil { + report(err) + } + } + } + } + os.Exit(exitCode) + return nil +} + +func isGoFile(f os.FileInfo) bool { + // ignore non-Go files + name := f.Name() + return !f.IsDir() && !strings.HasPrefix(name, ".") && strings.HasSuffix(name, ".go") +} + +func processFile(filename string, in io.Reader, out io.Writer, stdin bool) error { + if in == nil { + f, err := os.Open(filename) + if err != nil { + return err + } + defer f.Close() + in = f + } + + src, err := ioutil.ReadAll(in) + if err != nil { + return err + } + + res, err := Process(filename, src, options) + if err != nil { + return err + } + + if !bytes.Equal(src, res) { + // formatting has changed + if goimportsList { + fmt.Fprintln(out, filename) + } + if goimportsWrite { + err = ioutil.WriteFile(filename, res, 0) + if err != nil { + return err + } + } + if goimportsDiff { + data, err := diff(src, res) + if err != nil { + return fmt.Errorf("computing diff: %s", err) + } + fmt.Printf("diff %s gofmt/%s\n", filename, filename) + out.Write(data) + } + } + + if !goimportsList && !goimportsWrite && !goimportsDiff { + _, err = out.Write(res) + } + + return err +} + +func visitFile(path string, f os.FileInfo, err error) error { + if err == nil && isGoFile(f) { + err = processFile(path, nil, os.Stdout, false) + } + if err != nil { + report(err) + } + return nil +} + +func walkDir(path string) { + filepath.Walk(path, visitFile) +} + +func diff(b1, b2 []byte) (data []byte, err error) { + f1, err := ioutil.TempFile("", "gofmt") + if err != nil { + return + } + defer os.Remove(f1.Name()) + defer f1.Close() + + f2, err := ioutil.TempFile("", "gofmt") + if err != nil { + return + } + defer os.Remove(f2.Name()) + defer f2.Close() + + f1.Write(b1) + f2.Write(b2) + + data, err = exec.Command("diff", "-u", f1.Name(), f2.Name()).CombinedOutput() + if len(data) > 0 { + // diff exits with a non-zero status when the files don't match. + // Ignore that failure as long as we get output. + err = nil + } + return +} diff --git a/vendor/github.com/visualfc/gotools/goimports/imports.go b/vendor/github.com/visualfc/gotools/goimports/imports.go new file mode 100644 index 0000000..161b5c0 --- /dev/null +++ b/vendor/github.com/visualfc/gotools/goimports/imports.go @@ -0,0 +1,281 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package imports implements a Go pretty-printer (like package "go/format") +// that also adds or removes import statements as necessary. +package goimports + +import ( + "bufio" + "bytes" + "fmt" + "go/ast" + "go/format" + "go/parser" + "go/printer" + "go/token" + "io" + "regexp" + "strconv" + "strings" + + "golang.org/x/tools/go/ast/astutil" +) + +// Options specifies options for processing files. +type Options struct { + Fragment bool // Accept fragment of a source file (no package statement) + AllErrors bool // Report all errors (not just the first 10 on different lines) + + Comments bool // Print comments (true if nil *Options provided) + TabIndent bool // Use tabs for indent (true if nil *Options provided) + Format bool + TabWidth int // Tab width (8 if nil *Options provided) +} + +// Process formats and adjusts imports for the provided file. +// If opt is nil the defaults are used. +func Process(filename string, src []byte, opt *Options) ([]byte, error) { + if opt == nil { + opt = &Options{Comments: true, TabIndent: true, TabWidth: 8} + } + + fileSet := token.NewFileSet() + file, adjust, err := goImportParse(fileSet, filename, src, opt) + if err != nil { + return nil, err + } + + _, err = fixImports(fileSet, file) + if err != nil { + return nil, err + } + + sortImports(fileSet, file) + imps := astutil.Imports(fileSet, file) + + var spacesBefore []string // import paths we need spaces before + for _, impSection := range imps { + // Within each block of contiguous imports, see if any + // import lines are in different group numbers. If so, + // we'll need to put a space between them so it's + // compatible with gofmt. + lastGroup := -1 + for _, importSpec := range impSection { + importPath, _ := strconv.Unquote(importSpec.Path.Value) + groupNum := importGroup(importPath) + if groupNum != lastGroup && lastGroup != -1 { + spacesBefore = append(spacesBefore, importPath) + } + lastGroup = groupNum + } + + } + + printerMode := printer.UseSpaces + if opt.TabIndent { + printerMode |= printer.TabIndent + } + printConfig := &printer.Config{Mode: printerMode, Tabwidth: opt.TabWidth} + + var buf bytes.Buffer + err = printConfig.Fprint(&buf, fileSet, file) + if err != nil { + return nil, err + } + out := buf.Bytes() + if adjust != nil { + out = adjust(src, out) + } + if len(spacesBefore) > 0 { + out = addImportSpaces(bytes.NewReader(out), spacesBefore) + } + if opt.Format { + out, err = format.Source(out) + if err != nil { + return nil, err + } + } + return out, nil +} + +// parse parses src, which was read from filename, +// as a Go source file or statement list. +func goImportParse(fset *token.FileSet, filename string, src []byte, opt *Options) (*ast.File, func(orig, src []byte) []byte, error) { + parserMode := parser.Mode(0) + if opt.Comments { + parserMode |= parser.ParseComments + } + if opt.AllErrors { + parserMode |= parser.AllErrors + } + + // Try as whole source file. + file, err := parser.ParseFile(fset, filename, src, parserMode) + if err == nil { + return file, nil, nil + } + // If the error is that the source file didn't begin with a + // package line and we accept fragmented input, fall through to + // try as a source fragment. Stop and return on any other error. + if !opt.Fragment || !strings.Contains(err.Error(), "expected 'package'") { + return nil, nil, err + } + + // If this is a declaration list, make it a source file + // by inserting a package clause. + // Insert using a ;, not a newline, so that the line numbers + // in psrc match the ones in src. + psrc := append([]byte("package main;"), src...) + file, err = parser.ParseFile(fset, filename, psrc, parserMode) + if err == nil { + // If a main function exists, we will assume this is a main + // package and leave the file. + if containsMainFunc(file) { + return file, nil, nil + } + + adjust := func(orig, src []byte) []byte { + // Remove the package clause. + // Gofmt has turned the ; into a \n. + src = src[len("package main\n"):] + return matchSpace(orig, src) + } + return file, adjust, nil + } + // If the error is that the source file didn't begin with a + // declaration, fall through to try as a statement list. + // Stop and return on any other error. + if !strings.Contains(err.Error(), "expected declaration") { + return nil, nil, err + } + + // If this is a statement list, make it a source file + // by inserting a package clause and turning the list + // into a function body. This handles expressions too. + // Insert using a ;, not a newline, so that the line numbers + // in fsrc match the ones in src. + fsrc := append(append([]byte("package p; func _() {"), src...), '}') + file, err = parser.ParseFile(fset, filename, fsrc, parserMode) + if err == nil { + adjust := func(orig, src []byte) []byte { + // Remove the wrapping. + // Gofmt has turned the ; into a \n\n. + src = src[len("package p\n\nfunc _() {"):] + src = src[:len(src)-len("}\n")] + // Gofmt has also indented the function body one level. + // Remove that indent. + src = bytes.Replace(src, []byte("\n\t"), []byte("\n"), -1) + return matchSpace(orig, src) + } + return file, adjust, nil + } + + // Failed, and out of options. + return nil, nil, err +} + +// containsMainFunc checks if a file contains a function declaration with the +// function signature 'func main()' +func containsMainFunc(file *ast.File) bool { + for _, decl := range file.Decls { + if f, ok := decl.(*ast.FuncDecl); ok { + if f.Name.Name != "main" { + continue + } + + if len(f.Type.Params.List) != 0 { + continue + } + + if f.Type.Results != nil && len(f.Type.Results.List) != 0 { + continue + } + + return true + } + } + + return false +} + +func cutSpace(b []byte) (before, middle, after []byte) { + i := 0 + for i < len(b) && (b[i] == ' ' || b[i] == '\t' || b[i] == '\n') { + i++ + } + j := len(b) + for j > 0 && (b[j-1] == ' ' || b[j-1] == '\t' || b[j-1] == '\n') { + j-- + } + if i <= j { + return b[:i], b[i:j], b[j:] + } + return nil, nil, b[j:] +} + +// matchSpace reformats src to use the same space context as orig. +// 1) If orig begins with blank lines, matchSpace inserts them at the beginning of src. +// 2) matchSpace copies the indentation of the first non-blank line in orig +// to every non-blank line in src. +// 3) matchSpace copies the trailing space from orig and uses it in place +// of src's trailing space. +func matchSpace(orig []byte, src []byte) []byte { + before, _, after := cutSpace(orig) + i := bytes.LastIndex(before, []byte{'\n'}) + before, indent := before[:i+1], before[i+1:] + + _, src, _ = cutSpace(src) + + var b bytes.Buffer + b.Write(before) + for len(src) > 0 { + line := src + if i := bytes.IndexByte(line, '\n'); i >= 0 { + line, src = line[:i+1], line[i+1:] + } else { + src = nil + } + if len(line) > 0 && line[0] != '\n' { // not blank + b.Write(indent) + } + b.Write(line) + } + b.Write(after) + return b.Bytes() +} + +var impLine = regexp.MustCompile(`^\s+(?:[\w\.]+\s+)?"(.+)"`) + +func addImportSpaces(r io.Reader, breaks []string) []byte { + var out bytes.Buffer + sc := bufio.NewScanner(r) + inImports := false + done := false + for sc.Scan() { + s := sc.Text() + + if !inImports && !done && strings.HasPrefix(s, "import") { + inImports = true + } + if inImports && (strings.HasPrefix(s, "var") || + strings.HasPrefix(s, "func") || + strings.HasPrefix(s, "const") || + strings.HasPrefix(s, "type")) { + done = true + inImports = false + } + if inImports && len(breaks) > 0 { + if m := impLine.FindStringSubmatch(s); m != nil { + if m[1] == string(breaks[0]) { + out.WriteByte('\n') + breaks = breaks[1:] + } + } + } + + fmt.Fprintln(&out, s) + } + return out.Bytes() +} diff --git a/vendor/github.com/visualfc/gotools/goimports/sortimports.go b/vendor/github.com/visualfc/gotools/goimports/sortimports.go new file mode 100644 index 0000000..35eaac7 --- /dev/null +++ b/vendor/github.com/visualfc/gotools/goimports/sortimports.go @@ -0,0 +1,214 @@ +// +build go1.2 + +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Hacked up copy of go/ast/import.go + +package goimports + +import ( + "go/ast" + "go/token" + "sort" + "strconv" +) + +// sortImports sorts runs of consecutive import lines in import blocks in f. +// It also removes duplicate imports when it is possible to do so without data loss. +func sortImports(fset *token.FileSet, f *ast.File) { + for i, d := range f.Decls { + d, ok := d.(*ast.GenDecl) + if !ok || d.Tok != token.IMPORT { + // Not an import declaration, so we're done. + // Imports are always first. + break + } + + if len(d.Specs) == 0 { + // Empty import block, remove it. + f.Decls = append(f.Decls[:i], f.Decls[i+1:]...) + } + + if !d.Lparen.IsValid() { + // Not a block: sorted by default. + continue + } + + // Identify and sort runs of specs on successive lines. + i := 0 + specs := d.Specs[:0] + for j, s := range d.Specs { + if j > i && fset.Position(s.Pos()).Line > 1+fset.Position(d.Specs[j-1].End()).Line { + // j begins a new run. End this one. + specs = append(specs, sortSpecs(fset, f, d.Specs[i:j])...) + i = j + } + } + specs = append(specs, sortSpecs(fset, f, d.Specs[i:])...) + d.Specs = specs + + // Deduping can leave a blank line before the rparen; clean that up. + if len(d.Specs) > 0 { + lastSpec := d.Specs[len(d.Specs)-1] + lastLine := fset.Position(lastSpec.Pos()).Line + if rParenLine := fset.Position(d.Rparen).Line; rParenLine > lastLine+1 { + fset.File(d.Rparen).MergeLine(rParenLine - 1) + } + } + } +} + +func importPath(s ast.Spec) string { + t, err := strconv.Unquote(s.(*ast.ImportSpec).Path.Value) + if err == nil { + return t + } + return "" +} + +func importName(s ast.Spec) string { + n := s.(*ast.ImportSpec).Name + if n == nil { + return "" + } + return n.Name +} + +func importComment(s ast.Spec) string { + c := s.(*ast.ImportSpec).Comment + if c == nil { + return "" + } + return c.Text() +} + +// collapse indicates whether prev may be removed, leaving only next. +func collapse(prev, next ast.Spec) bool { + if importPath(next) != importPath(prev) || importName(next) != importName(prev) { + return false + } + return prev.(*ast.ImportSpec).Comment == nil +} + +type posSpan struct { + Start token.Pos + End token.Pos +} + +func sortSpecs(fset *token.FileSet, f *ast.File, specs []ast.Spec) []ast.Spec { + // Can't short-circuit here even if specs are already sorted, + // since they might yet need deduplication. + // A lone import, however, may be safely ignored. + if len(specs) <= 1 { + return specs + } + + // Record positions for specs. + pos := make([]posSpan, len(specs)) + for i, s := range specs { + pos[i] = posSpan{s.Pos(), s.End()} + } + + // Identify comments in this range. + // Any comment from pos[0].Start to the final line counts. + lastLine := fset.Position(pos[len(pos)-1].End).Line + cstart := len(f.Comments) + cend := len(f.Comments) + for i, g := range f.Comments { + if g.Pos() < pos[0].Start { + continue + } + if i < cstart { + cstart = i + } + if fset.Position(g.End()).Line > lastLine { + cend = i + break + } + } + comments := f.Comments[cstart:cend] + + // Assign each comment to the import spec preceding it. + importComment := map[*ast.ImportSpec][]*ast.CommentGroup{} + specIndex := 0 + for _, g := range comments { + for specIndex+1 < len(specs) && pos[specIndex+1].Start <= g.Pos() { + specIndex++ + } + s := specs[specIndex].(*ast.ImportSpec) + importComment[s] = append(importComment[s], g) + } + + // Sort the import specs by import path. + // Remove duplicates, when possible without data loss. + // Reassign the import paths to have the same position sequence. + // Reassign each comment to abut the end of its spec. + // Sort the comments by new position. + sort.Sort(byImportSpec(specs)) + + // Dedup. Thanks to our sorting, we can just consider + // adjacent pairs of imports. + deduped := specs[:0] + for i, s := range specs { + if i == len(specs)-1 || !collapse(s, specs[i+1]) { + deduped = append(deduped, s) + } else { + p := s.Pos() + fset.File(p).MergeLine(fset.Position(p).Line) + } + } + specs = deduped + + // Fix up comment positions + for i, s := range specs { + s := s.(*ast.ImportSpec) + if s.Name != nil { + s.Name.NamePos = pos[i].Start + } + s.Path.ValuePos = pos[i].Start + s.EndPos = pos[i].End + for _, g := range importComment[s] { + for _, c := range g.List { + c.Slash = pos[i].End + } + } + } + + sort.Sort(byCommentPos(comments)) + + return specs +} + +type byImportSpec []ast.Spec // slice of *ast.ImportSpec + +func (x byImportSpec) Len() int { return len(x) } +func (x byImportSpec) Swap(i, j int) { x[i], x[j] = x[j], x[i] } +func (x byImportSpec) Less(i, j int) bool { + ipath := importPath(x[i]) + jpath := importPath(x[j]) + + igroup := importGroup(ipath) + jgroup := importGroup(jpath) + if igroup != jgroup { + return igroup < jgroup + } + + if ipath != jpath { + return ipath < jpath + } + iname := importName(x[i]) + jname := importName(x[j]) + + if iname != jname { + return iname < jname + } + return importComment(x[i]) < importComment(x[j]) +} + +type byCommentPos []*ast.CommentGroup + +func (x byCommentPos) Len() int { return len(x) } +func (x byCommentPos) Swap(i, j int) { x[i], x[j] = x[j], x[i] } +func (x byCommentPos) Less(i, j int) bool { return x[i].Pos() < x[j].Pos() } diff --git a/vendor/github.com/visualfc/gotools/goimports/sortimports_compat.go b/vendor/github.com/visualfc/gotools/goimports/sortimports_compat.go new file mode 100644 index 0000000..1624ce8 --- /dev/null +++ b/vendor/github.com/visualfc/gotools/goimports/sortimports_compat.go @@ -0,0 +1,14 @@ +// +build !go1.2 + +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package goimports + +import "go/ast" + +// Go 1.1 users don't get fancy package grouping. +// But this is still gofmt-compliant: + +var sortImports = ast.SortImports diff --git a/vendor/github.com/visualfc/gotools/gopresent/gopresent.go b/vendor/github.com/visualfc/gotools/gopresent/gopresent.go new file mode 100644 index 0000000..e0242a2 --- /dev/null +++ b/vendor/github.com/visualfc/gotools/gopresent/gopresent.go @@ -0,0 +1,383 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +//modify 2013-2014 visualfc + +package gopresent + +import ( + "fmt" + "html/template" + "io" + "os" + "path/filepath" + + "github.com/visualfc/gotools/command" + "golang.org/x/tools/present" +) + +var Command = &command.Command{ + Run: runPresent, + UsageLine: "gopresent", + Short: "golang present util", + Long: `golang present util`, +} + +var presentVerifyOnly bool +var presentInput string +var presentStdout bool +var presentOutput string + +func init() { + Command.Flag.BoolVar(&presentVerifyOnly, "v", false, "verify present only") + Command.Flag.BoolVar(&presentStdout, "stdout", false, "output use std output") + Command.Flag.StringVar(&presentInput, "i", "", "input golang present file") + Command.Flag.StringVar(&presentOutput, "o", "", "output html file name") +} + +func runPresent(cmd *command.Command, args []string) error { + if presentInput == "" || !isDoc(presentInput) { + cmd.Usage() + return os.ErrInvalid + } + + if presentVerifyOnly { + err := VerifyDoc(presentInput) + if err != nil { + fmt.Fprintf(os.Stderr, "present:%s", err) + command.SetExitStatus(3) + command.Exit() + } + return nil + } + w := os.Stdout + if !presentStdout { + if presentOutput == "" { + presentOutput = presentInput + ".html" + } + ext := filepath.Ext(presentOutput) + if ext != ".htm" && ext != ".html" { + presentOutput += ".html" + } + var err error + w, err = os.Create(presentOutput) + if err != nil { + fmt.Fprintf(os.Stderr, "present:%s", err) + command.SetExitStatus(3) + command.Exit() + } + } + err := RenderDoc(w, presentInput) + if err != nil { + fmt.Fprintf(os.Stderr, "present:%s", err) + command.SetExitStatus(3) + command.Exit() + } + return nil +} + +var extensions = map[string]string{ + ".slide": "slides.tmpl", + ".article": "article.tmpl", +} + +var extensions_tmpl = map[string]string{ + ".slide": slides_tmpl, + ".article": article_tmpl, +} + +func isDoc(path string) bool { + _, ok := extensions[filepath.Ext(path)] + return ok +} + +func VerifyDoc(docFile string) error { + doc, err := parse(docFile, 0) + if err != nil { + return err + } + dir := filepath.Dir(docFile) + return verify_doc(dir, doc) +} + +// renderDoc reads the present file, builds its template representation, +// and executes the template, sending output to w. +func renderDoc(w io.Writer, base, docFile string) error { + // Read the input and build the doc structure. + doc, err := parse(docFile, 0) + if err != nil { + return err + } + + // Find which template should be executed. + ext := filepath.Ext(docFile) + contentTmpl, ok := extensions[ext] + if !ok { + return fmt.Errorf("no template for extension %v", ext) + } + + // Locate the template file. + actionTmpl := filepath.Join(base, "templates/action.tmpl") + contentTmpl = filepath.Join(base, "templates", contentTmpl) + + // Read and parse the input. + tmpl := present.Template() + tmpl = tmpl.Funcs(template.FuncMap{"playable": playable}) + if _, err := tmpl.ParseFiles(actionTmpl, contentTmpl); err != nil { + return err + } + // Execute the template. + return doc.Render(w, tmpl) +} + +func RenderDoc(w io.Writer, docFile string) error { + // Read the input and build the doc structure. + doc, err := parse(docFile, 0) + if err != nil { + return err + } + + // Find which template should be executed. + ext := filepath.Ext(docFile) + contentTmpl, ok := extensions_tmpl[ext] + if !ok { + return fmt.Errorf("no template for extension %v", ext) + } + + // Locate the template file. + actionTmpl := action_tmpl //filepath.Join(base, "templates/action.tmpl") + // Read and parse the input. + tmpl := present.Template() + tmpl = tmpl.Funcs(template.FuncMap{"playable": playable}) + if tmpl, err = tmpl.New("action").Parse(actionTmpl); err != nil { + return err + } + if tmpl, err = tmpl.New("content").Parse(contentTmpl); err != nil { + return err + } + + // Execute the template. + return doc.Render(w, tmpl) +} + +func parse(name string, mode present.ParseMode) (*present.Doc, error) { + f, err := os.Open(name) + if err != nil { + return nil, err + } + defer f.Close() + return present.Parse(f, name, 0) +} + +func playable(c present.Code) bool { + return present.PlayEnabled && c.Play +} + +func isSkipURL(url string) bool { + if filepath.HasPrefix(url, "http://") { + return true + } + if filepath.HasPrefix(url, "https://") { + return true + } + return false +} + +func verify_path(root string, url string) error { + if isSkipURL(url) { + return nil + } + path := url + if !filepath.IsAbs(url) { + path = filepath.Join(root, path) + } + _, err := os.Stat(path) + if err != nil { + return err + } + return nil +} + +func verify_doc(root string, doc *present.Doc) error { + for _, section := range doc.Sections { + for _, elem := range section.Elem { + switch i := elem.(type) { + case present.Image: + if err := verify_path(root, i.URL); err != nil { + return fmt.Errorf("! .image %s not exist", i.URL) + } + } + } + } + return nil +} + +var action_tmpl = ` +{/* +This is the action template. +It determines how the formatting actions are rendered. +*/} + +{{define "section"}} + {{.FormattedNumber}} {{.Title}} + {{range .Elem}}{{elem $.Template .}}{{end}} +{{end}} + +{{define "list"}} +
    + {{range .Bullet}} +
  • {{style .}}
    • + {{end}} +
+{{end}} + +{{define "text"}} + {{if .Pre}} + 
{{range .Lines}}{{.}}{{end}}
+ {{else}} +

+ {{range $i, $l := .Lines}}{{if $i}}{{template "newline"}} + {{end}}{{style $l}}{{end}} +

+ {{end}} +{{end}} + +{{define "code"}} +
{{.Text}}
+{{end}} + +{{define "image"}} +
+ +
+{{end}} + +{{define "iframe"}} + +{{end}} + +{{define "link"}}

{{style .Label}}

{{end}} + +{{define "html"}}{{.HTML}}{{end}} +` + +var article_tmpl = ` +{/* This is the article template. It defines how articles are formatted. */} + +{{define "root"}} + + + + {{.Title}} + + + + + +
+
+
{{.Title}} + {{with .Subtitle}}{{.}}{{end}} +
+
+
+
+
+ {{with .Sections}} +
+ {{template "TOC" .}} +
+ {{end}} + + {{range .Sections}} + {{elem $.Template .}} + {{end}}{{/* of Section block */}} + +

Authors

+ {{range .Authors}} +
+ {{range .Elem}}{{elem $.Template .}}{{end}} +
+ {{end}} +
+
+ + + +{{end}} + +{{define "TOC"}} +
    + {{range .}} +
  • {{.Title}}
    • + {{with .Sections}}{{template "TOC" .}}{{end}} + {{end}} +
+{{end}} + +{{define "newline"}} +{{/* No automatic line break. Paragraphs are free-form. */}} +{{end}} +` + +var slides_tmpl = ` +{/* This is the slide template. It defines how presentations are formatted. */} + +{{define "root"}} + + + + {{.Title}} + + + + + + +
+ +
+

{{.Title}}

+ {{with .Subtitle}}

{{.}}

{{end}} + {{if not .Time.IsZero}}

{{.Time.Format "2 January 2006"}}

{{end}} + {{range .Authors}} +
+ {{range .TextElem}}{{elem $.Template .}}{{end}} +
+ {{end}} +
+ + {{range $i, $s := .Sections}} + +
+ {{if $s.Elem}} +

{{$s.Title}}

+ {{range $s.Elem}}{{elem $.Template .}}{{end}} + {{else}} +

{{$s.Title}}

+ {{end}} +
+ + {{end}}{{/* of Slide block */}} + +
+

Thank you

+ {{range .Authors}} +
+ {{range .Elem}}{{elem $.Template .}}{{end}} +
+ {{end}} +
+ + + {{if .PlayEnabled}} + + {{end}} + +{{end}} + +{{define "newline"}} +
+{{end}} +` diff --git a/vendor/github.com/visualfc/gotools/jsonfmt/jsonfmt.go b/vendor/github.com/visualfc/gotools/jsonfmt/jsonfmt.go new file mode 100644 index 0000000..f9657ef --- /dev/null +++ b/vendor/github.com/visualfc/gotools/jsonfmt/jsonfmt.go @@ -0,0 +1,206 @@ +// Copyright 2011-2015 visualfc . All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package jsonfmt + +import ( + "bytes" + "encoding/json" + "fmt" + "io" + "io/ioutil" + "os" + "os/exec" + "path/filepath" + "strings" + + "github.com/visualfc/gotools/command" +) + +var Command = &command.Command{ + Run: runJsonFmt, + UsageLine: "jsonfmt", + Short: "json format util", + Long: `json format util.`, +} + +var ( + jsonFmtList bool + jsonFmtCompact bool + jsonFmtWrite bool + jsonFmtDiff bool + jsonTabWidth int + jsonTabIndent bool +) + +func init() { + Command.Flag.BoolVar(&jsonFmtList, "l", false, "list files whose formatting differs") + Command.Flag.BoolVar(&jsonFmtCompact, "c", false, "compact json") + Command.Flag.BoolVar(&jsonFmtWrite, "w", false, "write result to (source) file instead of stdout") + Command.Flag.BoolVar(&jsonFmtDiff, "d", false, "display diffs instead of rewriting files") + Command.Flag.IntVar(&jsonTabWidth, "tabwidth", 4, "tab width") + Command.Flag.BoolVar(&jsonTabIndent, "tabs", false, "indent with tabs") +} + +func runJsonFmt(cmd *command.Command, args []string) error { + opt := &JsonFmtOption{} + opt.List = jsonFmtList + opt.Compact = jsonFmtCompact + opt.IndentTab = jsonTabIndent + opt.TabWidth = jsonTabWidth + opt.Write = jsonFmtWrite + opt.Diff = jsonFmtDiff + + if len(args) == 0 { + if err := processJsonFile("", os.Stdin, os.Stdout, true, opt); err != nil { + reportJsonError(err) + } + } else { + for _, path := range args { + switch dir, err := os.Stat(path); { + case err != nil: + reportJsonError(err) + case dir.IsDir(): + filepath.Walk(path, func(path string, f os.FileInfo, err error) error { + if err == nil && isJsonFile(f) { + err = processJsonFile(path, nil, os.Stdout, false, opt) + } + if err != nil { + reportJsonError(err) + } + return nil + }) + default: + if err := processJsonFile(path, nil, os.Stdout, false, opt); err != nil { + reportJsonError(err) + } + } + } + } + return nil +} + +type JsonFmtOption struct { + List bool + Compact bool + Format bool + Write bool + Diff bool + IndentTab bool + TabWidth int +} + +func isJsonFile(f os.FileInfo) bool { + // ignore non-Go files + name := f.Name() + return !f.IsDir() && !strings.HasPrefix(name, ".") && strings.HasSuffix(name, ".json") +} + +func reportJsonError(err error) { + fmt.Fprintf(os.Stderr, "%s\n", err) + os.Exit(2) +} + +func processJson(filename string, src []byte, opt *JsonFmtOption) ([]byte, error) { + if opt.Compact { + var out bytes.Buffer + err := json.Compact(&out, src) + if err != nil { + return nil, err + } + return out.Bytes(), nil + } else { + var out bytes.Buffer + var err error + if opt.IndentTab { + err = json.Indent(&out, src, "", "\t") + } else { + var indent string + for i := 0; i < opt.TabWidth; i++ { + indent += " " + } + err = json.Indent(&out, src, "", indent) + } + if err != nil { + return nil, err + } + return out.Bytes(), nil + } + return src, nil +} + +func processJsonFile(filename string, in io.Reader, out io.Writer, stdin bool, opt *JsonFmtOption) error { + if in == nil { + f, err := os.Open(filename) + if err != nil { + return err + } + defer f.Close() + in = f + } + + src, err := ioutil.ReadAll(in) + if err != nil { + return err + } + + res, err := processJson(filename, src, opt) + if err != nil { + return err + } + + if !bytes.Equal(src, res) { + // formatting has changed + if opt.List { + fmt.Fprintln(out, filename) + } + if opt.Write { + err = ioutil.WriteFile(filename, res, 0) + if err != nil { + return err + } + } + if opt.Diff { + data, err := diffJson(src, res) + if err != nil { + return fmt.Errorf("computing diff: %s", err) + } + fmt.Printf("diff %s json/%s\n", filename, filename) + out.Write(data) + } + } + + if !opt.List && !opt.Write && !opt.Diff { + _, err = out.Write(res) + } + + return err +} + +func diffJson(b1, b2 []byte) (data []byte, err error) { + f1, err := ioutil.TempFile("", "json") + if err != nil { + return + } + defer os.Remove(f1.Name()) + defer f1.Close() + + f2, err := ioutil.TempFile("", "json") + if err != nil { + return + } + defer os.Remove(f2.Name()) + defer f2.Close() + + f1.Write(b1) + f2.Write(b2) + + data, err = exec.Command("diff", "-u", f1.Name(), f2.Name()).CombinedOutput() + if len(data) > 0 { + // diff exits with a non-zero status when the files don't match. + // Ignore that failure as long as we get output. + err = nil + } + return +} diff --git a/vendor/github.com/visualfc/gotools/oracle/oracle.go b/vendor/github.com/visualfc/gotools/oracle/oracle.go new file mode 100644 index 0000000..eff6fae --- /dev/null +++ b/vendor/github.com/visualfc/gotools/oracle/oracle.go @@ -0,0 +1,105 @@ +// Copyright 2011-2015 visualfc . All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package oracle + +import ( + "fmt" + "go/build" + "log" + "os" + "runtime" + + "github.com/visualfc/gotools/command" + + "golang.org/x/tools/oracle" +) + +//The mode argument determines the query to perform: + +// callees show possible targets of selected function call +// callers show possible callers of selected function +// callgraph show complete callgraph of program +// callstack show path from callgraph root to selected function +// describe describe selected syntax: definition, methods, etc +// freevars show free variables of selection +// implements show 'implements' relation for selected type +// peers show send/receive corresponding to selected channel op +// referrers show all refs to entity denoted by selected identifier +// what show basic information about the selected syntax node + +var Command = &command.Command{ + Run: runOracle, + UsageLine: "oracle", + Short: "golang oracle util", + Long: `golang oracle util.`, +} + +var ( + oraclePos string + oracleReflect bool +) + +func init() { + Command.Flag.StringVar(&oraclePos, "pos", "", "filename:#offset") + Command.Flag.BoolVar(&oracleReflect, "reflect", false, "Analyze reflection soundly (slow).") +} + +func runOracle(cmd *command.Command, args []string) error { + if len(args) < 2 { + cmd.Usage() + return os.ErrInvalid + } + if os.Getenv("GOMAXPROCS") == "" { + n := runtime.NumCPU() + if n < 4 { + n = 4 + } + runtime.GOMAXPROCS(n) + } + mode := args[0] + args = args[1:] + if args[0] == "." { + pkgPath, err := os.Getwd() + if err != nil { + log.Fatalln(err) + } + pkg, err := build.Default.ImportDir(pkgPath, 0) + if err != nil { + log.Fatalln(err) + } + args = pkg.GoFiles + //log.Println(pkg.ImportPath) + if pkg.ImportPath != "." && pkg.ImportPath != "" { + args = []string{pkg.ImportPath} + } + } + query := oracle.Query{ + Mode: mode, + Pos: oraclePos, + Build: &build.Default, + Scope: args, + PTALog: nil, + Reflection: oracleReflect, + } + + if err := oracle.Run(&query); err != nil { + fmt.Fprintf(os.Stderr, "oracle: %s.\n", err) + return err + } + + if mode == "referrers" { + ref := query.Serial().Referrers + if ref != nil { + fmt.Fprintln(os.Stdout, ref.Desc) + fmt.Fprintln(os.Stdout, ref.ObjPos) + for _, v := range ref.Refs { + fmt.Fprintln(os.Stdout, v) + } + } + } else { + query.WriteTo(os.Stdout) + } + return nil +} diff --git a/vendor/github.com/visualfc/gotools/pkgs/pkgs.go b/vendor/github.com/visualfc/gotools/pkgs/pkgs.go new file mode 100644 index 0000000..fe47e5c --- /dev/null +++ b/vendor/github.com/visualfc/gotools/pkgs/pkgs.go @@ -0,0 +1,379 @@ +// Copyright 2011-2015 visualfc . All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package pkgs + +import ( + "encoding/json" + "fmt" + "go/build" + "os" + "path/filepath" + "runtime" + "sort" + "strings" + "sync" + + "github.com/visualfc/gotools/command" + "github.com/visualfc/gotools/goapi" +) + +var Command = &command.Command{ + Run: runPkgs, + UsageLine: "pkgs", + Short: "print liteide_stub version", + Long: `Version prints the liteide_stub version.`, +} + +var ( + pkgsList bool + pkgsJson bool + pkgsFind string + pkgsStd bool + pkgsPkgOnly bool + pkgsSkipGoroot bool +) + +func init() { + Command.Flag.BoolVar(&pkgsList, "list", false, "list all package") + Command.Flag.BoolVar(&pkgsJson, "json", false, "json format") + Command.Flag.BoolVar(&pkgsStd, "std", false, "std library") + Command.Flag.BoolVar(&pkgsPkgOnly, "pkg", false, "pkg only") + Command.Flag.BoolVar(&pkgsSkipGoroot, "skip_goroot", false, "skip goroot") + Command.Flag.StringVar(&pkgsFind, "find", "", "find package by name") +} + +func runPkgs(cmd *command.Command, args []string) error { + runtime.GOMAXPROCS(runtime.NumCPU()) + if len(args) != 0 { + cmd.Usage() + return os.ErrInvalid + } + //pkgIndexOnce.Do(loadPkgsList) + var pp PathPkgsIndex + pp.LoadIndex() + pp.Sort() + if pkgsList { + for _, pi := range pp.indexs { + for _, pkg := range pi.pkgs { + if pkgsPkgOnly && pkg.IsCommand() { + continue + } + if pkgsJson { + var p GoPackage + p.copyBuild(pkg) + b, err := json.MarshalIndent(&p, "", "\t") + if err == nil { + cmd.Stdout.Write(b) + cmd.Stdout.Write([]byte{'\n'}) + } + } else { + cmd.Println(pkg.ImportPath) + } + } + } + } else if pkgsFind != "" { + for _, pi := range pp.indexs { + for _, pkg := range pi.pkgs { + if pkg.Name == pkgsFind { + if pkgsPkgOnly && pkg.IsCommand() { + continue + } + if pkgsJson { + var p GoPackage + p.copyBuild(pkg) + b, err := json.MarshalIndent(p, "", "\t") + if err == nil { + cmd.Stdout.Write(b) + cmd.Stdout.Write([]byte{'\n'}) + } + } else { + cmd.Println(pkg.Name) + } + break + } + } + } + } + return nil +} + +// A Package describes a single package found in a directory. +type GoPackage struct { + // Note: These fields are part of the go command's public API. + // See list.go. It is okay to add fields, but not to change or + // remove existing ones. Keep in sync with list.go + Dir string `json:",omitempty"` // directory containing package sources + ImportPath string `json:",omitempty"` // import path of package in dir + Name string `json:",omitempty"` // package name + Doc string `json:",omitempty"` // package documentation string + Target string `json:",omitempty"` // install path + Goroot bool `json:",omitempty"` // is this package found in the Go root? + Standard bool `json:",omitempty"` // is this package part of the standard Go library? + Stale bool `json:",omitempty"` // would 'go install' do anything for this package? + Root string `json:",omitempty"` // Go root or Go path dir containing this package + ConflictDir string `json:",omitempty"` // Dir is hidden by this other directory + + // Source files + GoFiles []string `json:",omitempty"` // .go source files (excluding CgoFiles, TestGoFiles, XTestGoFiles) + CgoFiles []string `json:",omitempty"` // .go sources files that import "C" + IgnoredGoFiles []string `json:",omitempty"` // .go sources ignored due to build constraints + CFiles []string `json:",omitempty"` // .c source files + CXXFiles []string `json:",omitempty"` // .cc, .cpp and .cxx source files + MFiles []string `json:",omitempty"` // .m source files + HFiles []string `json:",omitempty"` // .h, .hh, .hpp and .hxx source files + SFiles []string `json:",omitempty"` // .s source files + SwigFiles []string `json:",omitempty"` // .swig files + SwigCXXFiles []string `json:",omitempty"` // .swigcxx files + SysoFiles []string `json:",omitempty"` // .syso system object files added to package + + // Cgo directives + CgoCFLAGS []string `json:",omitempty"` // cgo: flags for C compiler + CgoCPPFLAGS []string `json:",omitempty"` // cgo: flags for C preprocessor + CgoCXXFLAGS []string `json:",omitempty"` // cgo: flags for C++ compiler + CgoLDFLAGS []string `json:",omitempty"` // cgo: flags for linker + CgoPkgConfig []string `json:",omitempty"` // cgo: pkg-config names + + // Dependency information + Imports []string `json:",omitempty"` // import paths used by this package + Deps []string `json:",omitempty"` // all (recursively) imported dependencies + + // Error information + Incomplete bool `json:",omitempty"` // was there an error loading this package or dependencies? + + // Test information + TestGoFiles []string `json:",omitempty"` // _test.go files in package + TestImports []string `json:",omitempty"` // imports from TestGoFiles + XTestGoFiles []string `json:",omitempty"` // _test.go files outside package + XTestImports []string `json:",omitempty"` // imports from XTestGoFiles + + // Unexported fields are not part of the public API. + build *build.Package + pkgdir string // overrides build.PkgDir + imports []*goapi.Package + deps []*goapi.Package + gofiles []string // GoFiles+CgoFiles+TestGoFiles+XTestGoFiles files, absolute paths + sfiles []string + allgofiles []string // gofiles + IgnoredGoFiles, absolute paths + target string // installed file for this package (may be executable) + fake bool // synthesized package + forceBuild bool // this package must be rebuilt + forceLibrary bool // this package is a library (even if named "main") + cmdline bool // defined by files listed on command line + local bool // imported via local path (./ or ../) + localPrefix string // interpret ./ and ../ imports relative to this prefix + exeName string // desired name for temporary executable + coverMode string // preprocess Go source files with the coverage tool in this mode + coverVars map[string]*CoverVar // variables created by coverage analysis + omitDWARF bool // tell linker not to write DWARF information +} + +// CoverVar holds the name of the generated coverage variables targeting the named file. +type CoverVar struct { + File string // local file name + Var string // name of count struct +} + +func (p *GoPackage) copyBuild(pp *build.Package) { + p.build = pp + + p.Dir = pp.Dir + p.ImportPath = pp.ImportPath + p.Name = pp.Name + p.Doc = pp.Doc + p.Root = pp.Root + p.ConflictDir = pp.ConflictDir + // TODO? Target + p.Goroot = pp.Goroot + p.Standard = p.Goroot && p.ImportPath != "" && !strings.Contains(p.ImportPath, ".") + p.GoFiles = pp.GoFiles + p.CgoFiles = pp.CgoFiles + p.IgnoredGoFiles = pp.IgnoredGoFiles + p.CFiles = pp.CFiles + p.CXXFiles = pp.CXXFiles + p.MFiles = pp.MFiles + p.HFiles = pp.HFiles + p.SFiles = pp.SFiles + p.SwigFiles = pp.SwigFiles + p.SwigCXXFiles = pp.SwigCXXFiles + p.SysoFiles = pp.SysoFiles + p.CgoCFLAGS = pp.CgoCFLAGS + p.CgoCPPFLAGS = pp.CgoCPPFLAGS + p.CgoCXXFLAGS = pp.CgoCXXFLAGS + p.CgoLDFLAGS = pp.CgoLDFLAGS + p.CgoPkgConfig = pp.CgoPkgConfig + p.Imports = pp.Imports + p.TestGoFiles = pp.TestGoFiles + p.TestImports = pp.TestImports + p.XTestGoFiles = pp.XTestGoFiles + p.XTestImports = pp.XTestImports +} + +type PathPkgsIndex struct { + indexs []*PkgsIndex +} + +func (p *PathPkgsIndex) LoadIndex() { + var wg sync.WaitGroup + var context = build.Default + if pkgsStd { + context.GOPATH = "" + } + var srcDirs []string + goroot := context.GOROOT + gopath := context.GOPATH + context.GOPATH = "" + + if !pkgsSkipGoroot { + //go1.4 go/src/ + //go1.3 go/src/pkg; go/src/cmd + _, err := os.Stat(filepath.Join(goroot, "src/pkg/runtime")) + if err == nil { + for _, v := range context.SrcDirs() { + if strings.HasSuffix(v, "pkg") { + srcDirs = append(srcDirs, v[:len(v)-3]+"cmd") + } + srcDirs = append(srcDirs, v) + } + } else { + srcDirs = append(srcDirs, filepath.Join(goroot, "src")) + } + } + + context.GOPATH = gopath + context.GOROOT = "" + for _, v := range context.SrcDirs() { + srcDirs = append(srcDirs, v) + } + context.GOROOT = goroot + for _, path := range srcDirs { + pi := &PkgsIndex{} + p.indexs = append(p.indexs, pi) + pkgsGate.enter() + f, err := os.Open(path) + if err != nil { + pkgsGate.leave() + fmt.Fprint(os.Stderr, err) + continue + } + children, err := f.Readdir(-1) + f.Close() + pkgsGate.leave() + if err != nil { + fmt.Fprint(os.Stderr, err) + continue + } + for _, child := range children { + if child.IsDir() { + wg.Add(1) + go func(path, name string) { + defer wg.Done() + pi.loadPkgsPath(&wg, path, name) + }(path, child.Name()) + } + } + } + wg.Wait() +} + +func (p *PathPkgsIndex) Sort() { + for _, v := range p.indexs { + v.sort() + } +} + +type PkgsIndex struct { + sync.Mutex + pkgs []*build.Package +} + +func (p *PkgsIndex) sort() { + sort.Sort(PkgSlice(p.pkgs)) +} + +type PkgSlice []*build.Package + +func (p PkgSlice) Len() int { + return len([]*build.Package(p)) +} + +func (p PkgSlice) Less(i, j int) bool { + if p[i].IsCommand() && !p[j].IsCommand() { + return true + } else if !p[i].IsCommand() && p[j].IsCommand() { + return false + } + return p[i].ImportPath < p[j].ImportPath +} + +func (p PkgSlice) Swap(i, j int) { + p[i], p[j] = p[j], p[i] +} + +// pkgsgate protects the OS & filesystem from too much concurrency. +// Too much disk I/O -> too many threads -> swapping and bad scheduling. +// gate is a semaphore for limiting concurrency. +type gate chan struct{} + +func (g gate) enter() { g <- struct{}{} } +func (g gate) leave() { <-g } + +var pkgsGate = make(gate, 8) + +func (p *PkgsIndex) loadPkgsPath(wg *sync.WaitGroup, root, pkgrelpath string) { + importpath := filepath.ToSlash(pkgrelpath) + dir := filepath.Join(root, importpath) + + pkgsGate.enter() + defer pkgsGate.leave() + pkgDir, err := os.Open(dir) + if err != nil { + return + } + children, err := pkgDir.Readdir(-1) + pkgDir.Close() + if err != nil { + return + } + // hasGo tracks whether a directory actually appears to be a + // Go source code directory. If $GOPATH == $HOME, and + // $HOME/src has lots of other large non-Go projects in it, + // then the calls to importPathToName below can be expensive. + hasGo := false + for _, child := range children { + name := child.Name() + if name == "" { + continue + } + if c := name[0]; c == '.' || ('0' <= c && c <= '9') { + continue + } + if strings.HasSuffix(name, ".go") { + hasGo = true + } + if child.IsDir() { + if strings.HasPrefix(name, ".") || strings.HasPrefix(name, "_") || name == "testdata" { + continue + } + wg.Add(1) + go func(root, name string) { + defer wg.Done() + p.loadPkgsPath(wg, root, name) + }(root, filepath.Join(importpath, name)) + } + } + if hasGo { + buildPkg, err := build.ImportDir(dir, 0) + if err == nil { + if buildPkg.ImportPath == "." { + buildPkg.ImportPath = filepath.ToSlash(pkgrelpath) + buildPkg.Root = root + buildPkg.Goroot = true + } + p.Lock() + p.pkgs = append(p.pkgs, buildPkg) + p.Unlock() + } + } +} diff --git a/vendor/github.com/visualfc/gotools/runcmd/runcmd.go b/vendor/github.com/visualfc/gotools/runcmd/runcmd.go new file mode 100644 index 0000000..6560d62 --- /dev/null +++ b/vendor/github.com/visualfc/gotools/runcmd/runcmd.go @@ -0,0 +1,87 @@ +// Copyright 2011-2015 visualfc . All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package runcmd + +import ( + "fmt" + "os" + "os/exec" + "strings" + + "github.com/visualfc/gotools/command" +) + +var Command = &command.Command{ + Run: runCmd, + UsageLine: "runcmd [-w work_path] [arguments...]", + Short: "run program", + Long: `run program and arguments`, +} + +var execWorkPath string +var execWaitEnter bool + +func init() { + Command.Flag.StringVar(&execWorkPath, "w", "", "work path") + Command.Flag.BoolVar(&execWaitEnter, "e", true, "wait enter and continue") +} + +func runCmd(cmd *command.Command, args []string) error { + if len(args) == 0 { + cmd.Usage() + return os.ErrInvalid + } + if execWorkPath == "" { + var err error + execWorkPath, err = os.Getwd() + if err != nil { + fmt.Fprintf(os.Stderr, "liteide_stub exec: os.Getwd() false\n") + command.SetExitStatus(3) + command.Exit() + return err + } + } + fileName := args[0] + + filePath, err := exec.LookPath(fileName) + if err != nil { + filePath, err = exec.LookPath("./" + fileName) + } + if err != nil { + fmt.Fprintf(os.Stderr, "liteide_stub exec: file %s not found\n", fileName) + command.SetExitStatus(3) + command.Exit() + } + + fmt.Println("Starting Process", filePath, strings.Join(args[1:], " "), "...") + + command := exec.Command(filePath, args[1:]...) + command.Dir = execWorkPath + command.Stdin = os.Stdin + command.Stdout = os.Stdout + command.Stderr = os.Stderr + + err = command.Run() + + if err != nil { + fmt.Println("\nEnd Process", err) + } else { + fmt.Println("\nEnd Process", "exit status 0") + } + + exitWaitEnter() + return nil +} + +func exitWaitEnter() { + if !execWaitEnter { + return + } + fmt.Println("\nPress enter key to continue") + var s = [256]byte{} + os.Stdin.Read(s[:]) + command.SetExitStatus(0) + command.Exit() +} diff --git a/vendor/github.com/visualfc/gotools/stdlib/go13.go b/vendor/github.com/visualfc/gotools/stdlib/go13.go new file mode 100644 index 0000000..d81ad91 --- /dev/null +++ b/vendor/github.com/visualfc/gotools/stdlib/go13.go @@ -0,0 +1,19 @@ +// +build !go1.4 + +package stdlib + +import ( + "go/build" + "os" + "path/filepath" +) + +func ImportStdPkg(context *build.Context, path string, mode build.ImportMode) (*build.Package, error) { + realpath := filepath.Join(context.GOROOT, "src", "pkg", path) + if _, err := os.Stat(realpath); err != nil { + realpath = filepath.Join(context.GOROOT, "src", path) + } + pkg, err := context.ImportDir(realpath, 0) + pkg.ImportPath = path + return pkg, err +} diff --git a/vendor/github.com/visualfc/gotools/stdlib/go14.go b/vendor/github.com/visualfc/gotools/stdlib/go14.go new file mode 100644 index 0000000..9bd79d2 --- /dev/null +++ b/vendor/github.com/visualfc/gotools/stdlib/go14.go @@ -0,0 +1,19 @@ +// +build go1.4 + +package stdlib + +import ( + "go/build" + "os" + "path/filepath" +) + +func ImportStdPkg(context *build.Context, path string, mode build.ImportMode) (*build.Package, error) { + realpath := filepath.Join(context.GOROOT, "src", path) + if _, err := os.Stat(realpath); err != nil { + realpath = filepath.Join(context.GOROOT, "src/pkg", path) + } + pkg, err := context.ImportDir(realpath, 0) + pkg.ImportPath = path + return pkg, err +} diff --git a/vendor/github.com/visualfc/gotools/stdlib/mkpkglist.go b/vendor/github.com/visualfc/gotools/stdlib/mkpkglist.go new file mode 100644 index 0000000..ea408ae --- /dev/null +++ b/vendor/github.com/visualfc/gotools/stdlib/mkpkglist.go @@ -0,0 +1,168 @@ +// +build ignore + +package main + +import ( + "fmt" + "strings" +) + +var pkgList = ` +cmd/cgo +cmd/fix +cmd/go +cmd/gofmt +cmd/yacc +archive/tar +archive/zip +bufio +bytes +compress/bzip2 +compress/flate +compress/gzip +compress/lzw +compress/zlib +container/heap +container/list +container/ring +crypto +crypto/aes +crypto/cipher +crypto/des +crypto/dsa +crypto/ecdsa +crypto/elliptic +crypto/hmac +crypto/md5 +crypto/rand +crypto/rc4 +crypto/rsa +crypto/sha1 +crypto/sha256 +crypto/sha512 +crypto/subtle +crypto/tls +crypto/x509 +crypto/x509/pkix +database/sql +database/sql/driver +debug/dwarf +debug/elf +debug/gosym +debug/macho +debug/pe +encoding +encoding/ascii85 +encoding/asn1 +encoding/base32 +encoding/base64 +encoding/binary +encoding/csv +encoding/gob +encoding/hex +encoding/json +encoding/pem +encoding/xml +errors +expvar +flag +fmt +go/ast +go/build +go/doc +go/format +go/parser +go/printer +go/scanner +go/token +hash +hash/adler32 +hash/crc32 +hash/crc64 +hash/fnv +html +html/template +image +image/color +image/color/palette +image/draw +image/gif +image/jpeg +image/png +index/suffixarray +io +io/ioutil +log +log/syslog +math +math/big +math/cmplx +math/rand +mime +mime/multipart +net +net/http +net/http/cgi +net/http/cookiejar +net/http/fcgi +net/http/httptest +net/http/httputil +net/http/pprof +net/mail +net/rpc +net/rpc/jsonrpc +net/smtp +net/textproto +net/url +os +os/exec +os/signal +os/user +path +path/filepath +reflect +regexp +regexp/syntax +runtime +runtime/cgo +runtime/debug +runtime/pprof +runtime/race +sort +strconv +strings +sync +sync/atomic +syscall +testing +testing/iotest +testing/quick +text/scanner +text/tabwriter +text/template +text/template/parse +time +unicode +unicode/utf16 +unicode/utf8 +unsafe +` + +func main() { + //fmt.Println(pkgList) + var list []string + index := 0 + for _, v := range strings.Split(pkgList, "\n") { + v = strings.TrimSpace(v) + if v == "" { + continue + } + v = "\"" + v + "\"" + if index%4 == 0 && index != 0 { + v = "\n" + v + } + list = append(list, v) + index++ + } + fmt.Println(strings.Join(list, ",")) +} diff --git a/vendor/github.com/visualfc/gotools/stdlib/mkstdlib.go b/vendor/github.com/visualfc/gotools/stdlib/mkstdlib.go new file mode 100644 index 0000000..7118f2d --- /dev/null +++ b/vendor/github.com/visualfc/gotools/stdlib/mkstdlib.go @@ -0,0 +1,91 @@ +// +build ignore + +// mkstdlib generates the zstdlib.go file, containing the Go standard +// library API symbols. It's baked into the binary to avoid scanning +// GOPATH in the common case. +package main + +import ( + "bufio" + "bytes" + "fmt" + "go/format" + "io" + "log" + "os" + "path" + "path/filepath" + "regexp" + "sort" + "strings" +) + +func mustOpen(name string) io.Reader { + f, err := os.Open(name) + if err != nil { + log.Fatal(err) + } + return f +} + +func api(base string) string { + return filepath.Join(os.Getenv("GOROOT"), "api", base) +} + +var sym = regexp.MustCompile(`^pkg (\S+).*?, (?:var|func|type|const) ([A-Z]\w*)`) + +func main() { + var buf bytes.Buffer + outf := func(format string, args ...interface{}) { + fmt.Fprintf(&buf, format, args...) + } + outf("// AUTO-GENERATED BY mkstdlib.go\n\n") + outf("package imports\n") + outf("var stdlib = map[string]string{\n") + f := io.MultiReader( + mustOpen(api("go1.txt")), + mustOpen(api("go1.1.txt")), + mustOpen(api("go1.2.txt")), + mustOpen(api("go1.3.txt")), + ) + sc := bufio.NewScanner(f) + fullImport := map[string]string{} // "zip.NewReader" => "archive/zip" + ambiguous := map[string]bool{} + var keys []string + for sc.Scan() { + l := sc.Text() + has := func(v string) bool { return strings.Contains(l, v) } + if has("struct, ") || has("interface, ") || has(", method (") { + continue + } + if m := sym.FindStringSubmatch(l); m != nil { + full := m[1] + key := path.Base(full) + "." + m[2] + if exist, ok := fullImport[key]; ok { + if exist != full { + ambiguous[key] = true + } + } else { + fullImport[key] = full + keys = append(keys, key) + } + } + } + if err := sc.Err(); err != nil { + log.Fatal(err) + } + sort.Strings(keys) + for _, key := range keys { + if ambiguous[key] { + outf("\t// %q is ambiguous\n", key) + } else { + outf("\t%q: %q,\n", key, fullImport[key]) + } + } + outf("}\n") + fmtbuf, err := format.Source(buf.Bytes()) + if err != nil { + log.Fatal(err) + } + os.Stdout.Write(fmtbuf) +} diff --git a/vendor/github.com/visualfc/gotools/stdlib/pkglist.go b/vendor/github.com/visualfc/gotools/stdlib/pkglist.go new file mode 100644 index 0000000..2dc4164 --- /dev/null +++ b/vendor/github.com/visualfc/gotools/stdlib/pkglist.go @@ -0,0 +1,48 @@ +package stdlib + +var Packages = []string{ + "cmd/cgo", "cmd/fix", "cmd/go", "cmd/gofmt", + "cmd/yacc", "archive/tar", "archive/zip", "bufio", + "bytes", "compress/bzip2", "compress/flate", "compress/gzip", + "compress/lzw", "compress/zlib", "container/heap", "container/list", + "container/ring", "crypto", "crypto/aes", "crypto/cipher", + "crypto/des", "crypto/dsa", "crypto/ecdsa", "crypto/elliptic", + "crypto/hmac", "crypto/md5", "crypto/rand", "crypto/rc4", + "crypto/rsa", "crypto/sha1", "crypto/sha256", "crypto/sha512", + "crypto/subtle", "crypto/tls", "crypto/x509", "crypto/x509/pkix", + "database/sql", "database/sql/driver", "debug/dwarf", "debug/elf", + "debug/gosym", "debug/macho", "debug/pe", "encoding", + "encoding/ascii85", "encoding/asn1", "encoding/base32", "encoding/base64", + "encoding/binary", "encoding/csv", "encoding/gob", "encoding/hex", + "encoding/json", "encoding/pem", "encoding/xml", "errors", + "expvar", "flag", "fmt", "go/ast", + "go/build", "go/doc", "go/format", "go/parser", + "go/printer", "go/scanner", "go/token", "hash", + "hash/adler32", "hash/crc32", "hash/crc64", "hash/fnv", + "html", "html/template", "image", "image/color", + "image/color/palette", "image/draw", "image/gif", "image/jpeg", + "image/png", "index/suffixarray", "io", "io/ioutil", + "log", "log/syslog", "math", "math/big", + "math/cmplx", "math/rand", "mime", "mime/multipart", + "net", "net/http", "net/http/cgi", "net/http/cookiejar", + "net/http/fcgi", "net/http/httptest", "net/http/httputil", "net/http/pprof", + "net/mail", "net/rpc", "net/rpc/jsonrpc", "net/smtp", + "net/textproto", "net/url", "os", "os/exec", + "os/signal", "os/user", "path", "path/filepath", + "reflect", "regexp", "regexp/syntax", "runtime", + "runtime/cgo", "runtime/debug", "runtime/pprof", "runtime/race", + "sort", "strconv", "strings", "sync", + "sync/atomic", "syscall", "testing", "testing/iotest", + "testing/quick", "text/scanner", "text/tabwriter", "text/template", + "text/template/parse", "time", "unicode", "unicode/utf16", + "unicode/utf8", "unsafe", +} + +func IsStdPkg(pkg string) bool { + for _, v := range Packages { + if v == pkg { + return true + } + } + return false +} diff --git a/vendor/github.com/visualfc/gotools/stdlib/zstdlib.go b/vendor/github.com/visualfc/gotools/stdlib/zstdlib.go new file mode 100644 index 0000000..ab4ec64 --- /dev/null +++ b/vendor/github.com/visualfc/gotools/stdlib/zstdlib.go @@ -0,0 +1,8479 @@ +// AUTO-GENERATED BY mkstdlib.go + +package stdlib + +var Symbols = map[string]string{ + "adler32.Checksum": "hash/adler32", + "adler32.New": "hash/adler32", + "adler32.Size": "hash/adler32", + "aes.BlockSize": "crypto/aes", + "aes.KeySizeError": "crypto/aes", + "aes.NewCipher": "crypto/aes", + "ascii85.CorruptInputError": "encoding/ascii85", + "ascii85.Decode": "encoding/ascii85", + "ascii85.Encode": "encoding/ascii85", + "ascii85.MaxEncodedLen": "encoding/ascii85", + "ascii85.NewDecoder": "encoding/ascii85", + "ascii85.NewEncoder": "encoding/ascii85", + "asn1.BitString": "encoding/asn1", + "asn1.Enumerated": "encoding/asn1", + "asn1.Flag": "encoding/asn1", + "asn1.Marshal": "encoding/asn1", + "asn1.ObjectIdentifier": "encoding/asn1", + "asn1.RawContent": "encoding/asn1", + "asn1.RawValue": "encoding/asn1", + "asn1.StructuralError": "encoding/asn1", + "asn1.SyntaxError": "encoding/asn1", + "asn1.Unmarshal": "encoding/asn1", + "asn1.UnmarshalWithParams": "encoding/asn1", + "ast.ArrayType": "go/ast", + "ast.AssignStmt": "go/ast", + "ast.Bad": "go/ast", + "ast.BadDecl": "go/ast", + "ast.BadExpr": "go/ast", + "ast.BadStmt": "go/ast", + "ast.BasicLit": "go/ast", + "ast.BinaryExpr": "go/ast", + "ast.BlockStmt": "go/ast", + "ast.BranchStmt": "go/ast", + "ast.CallExpr": "go/ast", + "ast.CaseClause": "go/ast", + "ast.ChanDir": "go/ast", + "ast.ChanType": "go/ast", + "ast.CommClause": "go/ast", + "ast.Comment": "go/ast", + "ast.CommentGroup": "go/ast", + "ast.CommentMap": "go/ast", + "ast.CompositeLit": "go/ast", + "ast.Con": "go/ast", + "ast.DeclStmt": "go/ast", + "ast.DeferStmt": "go/ast", + "ast.Ellipsis": "go/ast", + "ast.EmptyStmt": "go/ast", + "ast.ExprStmt": "go/ast", + "ast.Field": "go/ast", + "ast.FieldFilter": "go/ast", + "ast.FieldList": "go/ast", + "ast.File": "go/ast", + "ast.FileExports": "go/ast", + "ast.Filter": "go/ast", + "ast.FilterDecl": "go/ast", + "ast.FilterFile": "go/ast", + "ast.FilterFuncDuplicates": "go/ast", + "ast.FilterImportDuplicates": "go/ast", + "ast.FilterPackage": "go/ast", + "ast.FilterUnassociatedComments": "go/ast", + "ast.ForStmt": "go/ast", + "ast.Fprint": "go/ast", + "ast.Fun": "go/ast", + "ast.FuncDecl": "go/ast", + "ast.FuncLit": "go/ast", + "ast.FuncType": "go/ast", + "ast.GenDecl": "go/ast", + "ast.GoStmt": "go/ast", + "ast.Ident": "go/ast", + "ast.IfStmt": "go/ast", + "ast.ImportSpec": "go/ast", + "ast.Importer": "go/ast", + "ast.IncDecStmt": "go/ast", + "ast.IndexExpr": "go/ast", + "ast.Inspect": "go/ast", + "ast.InterfaceType": "go/ast", + "ast.IsExported": "go/ast", + "ast.KeyValueExpr": "go/ast", + "ast.LabeledStmt": "go/ast", + "ast.Lbl": "go/ast", + "ast.MapType": "go/ast", + "ast.MergeMode": "go/ast", + "ast.MergePackageFiles": "go/ast", + "ast.NewCommentMap": "go/ast", + "ast.NewIdent": "go/ast", + "ast.NewObj": "go/ast", + "ast.NewPackage": "go/ast", + "ast.NewScope": "go/ast", + "ast.Node": "go/ast", + "ast.NotNilFilter": "go/ast", + "ast.ObjKind": "go/ast", + "ast.Object": "go/ast", + "ast.Package": "go/ast", + "ast.PackageExports": "go/ast", + "ast.ParenExpr": "go/ast", + "ast.Pkg": "go/ast", + "ast.Print": "go/ast", + "ast.RECV": "go/ast", + "ast.RangeStmt": "go/ast", + "ast.ReturnStmt": "go/ast", + "ast.SEND": "go/ast", + "ast.Scope": "go/ast", + "ast.SelectStmt": "go/ast", + "ast.SelectorExpr": "go/ast", + "ast.SendStmt": 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"atomic.LoadUint32": "sync/atomic", + "atomic.LoadUint64": "sync/atomic", + "atomic.LoadUintptr": "sync/atomic", + "atomic.StoreInt32": "sync/atomic", + "atomic.StoreInt64": "sync/atomic", + "atomic.StorePointer": "sync/atomic", + "atomic.StoreUint32": "sync/atomic", + "atomic.StoreUint64": "sync/atomic", + "atomic.StoreUintptr": "sync/atomic", + "atomic.SwapInt32": "sync/atomic", + "atomic.SwapInt64": "sync/atomic", + "atomic.SwapPointer": "sync/atomic", + "atomic.SwapUint32": "sync/atomic", + "atomic.SwapUint64": "sync/atomic", + "atomic.SwapUintptr": "sync/atomic", + "base32.CorruptInputError": "encoding/base32", + "base32.Encoding": "encoding/base32", + "base32.HexEncoding": "encoding/base32", + "base32.NewDecoder": "encoding/base32", + "base32.NewEncoder": "encoding/base32", + "base32.NewEncoding": "encoding/base32", + "base32.StdEncoding": "encoding/base32", + "base64.CorruptInputError": "encoding/base64", + "base64.Encoding": "encoding/base64", + "base64.NewDecoder": 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"build.IsLocalImport": "go/build", + "build.NoGoError": "go/build", + "build.Package": "go/build", + "build.ToolDir": "go/build", + "bytes.Buffer": "bytes", + "bytes.Compare": "bytes", + "bytes.Contains": "bytes", + "bytes.Count": "bytes", + "bytes.Equal": "bytes", + "bytes.EqualFold": "bytes", + "bytes.ErrTooLarge": "bytes", + "bytes.Fields": "bytes", + "bytes.FieldsFunc": "bytes", + "bytes.HasPrefix": "bytes", + "bytes.HasSuffix": "bytes", + "bytes.Index": "bytes", + "bytes.IndexAny": "bytes", + "bytes.IndexByte": "bytes", + "bytes.IndexFunc": "bytes", + "bytes.IndexRune": "bytes", + "bytes.Join": "bytes", + "bytes.LastIndex": "bytes", + "bytes.LastIndexAny": "bytes", + "bytes.LastIndexFunc": "bytes", + "bytes.Map": "bytes", + "bytes.MinRead": "bytes", + "bytes.NewBuffer": "bytes", + "bytes.NewBufferString": "bytes", + "bytes.NewReader": "bytes", + "bytes.Reader": "bytes", + "bytes.Repeat": "bytes", + "bytes.Replace": "bytes", + "bytes.Runes": "bytes", + "bytes.Split": "bytes", + "bytes.SplitAfter": "bytes", + "bytes.SplitAfterN": "bytes", + "bytes.SplitN": "bytes", + "bytes.Title": "bytes", + "bytes.ToLower": "bytes", + "bytes.ToLowerSpecial": "bytes", + "bytes.ToTitle": "bytes", + "bytes.ToTitleSpecial": "bytes", + "bytes.ToUpper": "bytes", + "bytes.ToUpperSpecial": "bytes", + "bytes.Trim": "bytes", + "bytes.TrimFunc": "bytes", + "bytes.TrimLeft": "bytes", + "bytes.TrimLeftFunc": "bytes", + "bytes.TrimPrefix": "bytes", + "bytes.TrimRight": "bytes", + "bytes.TrimRightFunc": "bytes", + "bytes.TrimSpace": "bytes", + "bytes.TrimSuffix": "bytes", + "bzip2.NewReader": "compress/bzip2", + "bzip2.StructuralError": "compress/bzip2", + "cgi.Handler": "net/http/cgi", + "cgi.Request": "net/http/cgi", + "cgi.RequestFromMap": "net/http/cgi", + "cgi.Serve": "net/http/cgi", + "cipher.AEAD": "crypto/cipher", + "cipher.Block": "crypto/cipher", + "cipher.BlockMode": "crypto/cipher", + "cipher.NewCBCDecrypter": "crypto/cipher", + "cipher.NewCBCEncrypter": "crypto/cipher", + "cipher.NewCFBDecrypter": "crypto/cipher", + "cipher.NewCFBEncrypter": "crypto/cipher", + "cipher.NewCTR": "crypto/cipher", + "cipher.NewGCM": "crypto/cipher", + "cipher.NewOFB": "crypto/cipher", + "cipher.Stream": "crypto/cipher", + "cipher.StreamReader": "crypto/cipher", + "cipher.StreamWriter": "crypto/cipher", + "cmplx.Abs": "math/cmplx", + "cmplx.Acos": "math/cmplx", + "cmplx.Acosh": "math/cmplx", + "cmplx.Asin": "math/cmplx", + "cmplx.Asinh": "math/cmplx", + "cmplx.Atan": "math/cmplx", + "cmplx.Atanh": "math/cmplx", + "cmplx.Conj": "math/cmplx", + "cmplx.Cos": "math/cmplx", + "cmplx.Cosh": "math/cmplx", + "cmplx.Cot": "math/cmplx", + "cmplx.Exp": "math/cmplx", + "cmplx.Inf": "math/cmplx", + "cmplx.IsInf": "math/cmplx", + "cmplx.IsNaN": "math/cmplx", + "cmplx.Log": "math/cmplx", + "cmplx.Log10": "math/cmplx", + "cmplx.NaN": "math/cmplx", + "cmplx.Phase": "math/cmplx", + "cmplx.Polar": "math/cmplx", + "cmplx.Pow": "math/cmplx", + "cmplx.Rect": "math/cmplx", + "cmplx.Sin": 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"color.YCbCr": "image/color", + "color.YCbCrModel": "image/color", + "color.YCbCrToRGB": "image/color", + "cookiejar.Jar": "net/http/cookiejar", + "cookiejar.New": "net/http/cookiejar", + "cookiejar.Options": "net/http/cookiejar", + "cookiejar.PublicSuffixList": "net/http/cookiejar", + "crc32.Castagnoli": "hash/crc32", + "crc32.Checksum": "hash/crc32", + "crc32.ChecksumIEEE": "hash/crc32", + "crc32.IEEE": "hash/crc32", + "crc32.IEEETable": "hash/crc32", + "crc32.Koopman": "hash/crc32", + "crc32.MakeTable": "hash/crc32", + "crc32.New": "hash/crc32", + "crc32.NewIEEE": "hash/crc32", + "crc32.Size": "hash/crc32", + "crc32.Table": "hash/crc32", + "crc32.Update": "hash/crc32", + "crc64.Checksum": "hash/crc64", + "crc64.ECMA": "hash/crc64", + "crc64.ISO": "hash/crc64", + "crc64.MakeTable": "hash/crc64", + "crc64.New": "hash/crc64", + "crc64.Size": "hash/crc64", + "crc64.Table": "hash/crc64", + "crc64.Update": "hash/crc64", + "crypto.Hash": "crypto", + "crypto.MD4": "crypto", + "crypto.MD5": "crypto", + "crypto.MD5SHA1": "crypto", + "crypto.PrivateKey": "crypto", + "crypto.PublicKey": "crypto", + "crypto.RIPEMD160": "crypto", + "crypto.RegisterHash": "crypto", + "crypto.SHA1": "crypto", + "crypto.SHA224": "crypto", + "crypto.SHA256": "crypto", + "crypto.SHA384": "crypto", + "crypto.SHA512": "crypto", + "csv.ErrBareQuote": "encoding/csv", + "csv.ErrFieldCount": "encoding/csv", + "csv.ErrQuote": "encoding/csv", + "csv.ErrTrailingComma": "encoding/csv", + "csv.NewReader": "encoding/csv", + "csv.NewWriter": "encoding/csv", + "csv.ParseError": "encoding/csv", + "csv.Reader": "encoding/csv", + "csv.Writer": "encoding/csv", + "debug.FreeOSMemory": "runtime/debug", + "debug.GCStats": "runtime/debug", + "debug.PrintStack": "runtime/debug", + "debug.ReadGCStats": "runtime/debug", + "debug.SetGCPercent": "runtime/debug", + "debug.SetMaxStack": "runtime/debug", + "debug.SetMaxThreads": "runtime/debug", + "debug.SetPanicOnFault": "runtime/debug", + "debug.Stack": "runtime/debug", + "debug.WriteHeapDump": "runtime/debug", + "des.BlockSize": "crypto/des", + "des.KeySizeError": "crypto/des", + "des.NewCipher": "crypto/des", + "des.NewTripleDESCipher": "crypto/des", + "doc.AllDecls": "go/doc", + "doc.AllMethods": "go/doc", + "doc.Example": "go/doc", + "doc.Examples": "go/doc", + "doc.Filter": "go/doc", + "doc.Func": "go/doc", + "doc.IllegalPrefixes": "go/doc", + "doc.Mode": "go/doc", + "doc.New": "go/doc", + "doc.Note": "go/doc", + "doc.Package": "go/doc", + "doc.Synopsis": "go/doc", + "doc.ToHTML": "go/doc", + "doc.ToText": "go/doc", + "doc.Type": "go/doc", + "doc.Value": "go/doc", + "draw.Draw": "image/draw", + "draw.DrawMask": "image/draw", + "draw.Drawer": "image/draw", + "draw.FloydSteinberg": "image/draw", + "draw.Image": "image/draw", + "draw.Op": "image/draw", + "draw.Over": "image/draw", + "draw.Quantizer": "image/draw", + "draw.Src": "image/draw", + "driver.Bool": "database/sql/driver", + "driver.ColumnConverter": "database/sql/driver", + "driver.Conn": 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"dsa.GenerateKey": "crypto/dsa", + "dsa.GenerateParameters": "crypto/dsa", + "dsa.L1024N160": "crypto/dsa", + "dsa.L2048N224": "crypto/dsa", + "dsa.L2048N256": "crypto/dsa", + "dsa.L3072N256": "crypto/dsa", + "dsa.ParameterSizes": "crypto/dsa", + "dsa.Parameters": "crypto/dsa", + "dsa.PrivateKey": "crypto/dsa", + "dsa.PublicKey": "crypto/dsa", + "dsa.Sign": "crypto/dsa", + "dsa.Verify": "crypto/dsa", + "dwarf.AddrType": "debug/dwarf", + "dwarf.ArrayType": "debug/dwarf", + "dwarf.Attr": "debug/dwarf", + "dwarf.AttrAbstractOrigin": "debug/dwarf", + "dwarf.AttrAccessibility": "debug/dwarf", + "dwarf.AttrAddrClass": "debug/dwarf", + "dwarf.AttrAllocated": "debug/dwarf", + "dwarf.AttrArtificial": "debug/dwarf", + "dwarf.AttrAssociated": "debug/dwarf", + "dwarf.AttrBaseTypes": "debug/dwarf", + "dwarf.AttrBitOffset": "debug/dwarf", + "dwarf.AttrBitSize": "debug/dwarf", + "dwarf.AttrByteSize": "debug/dwarf", + "dwarf.AttrCallColumn": "debug/dwarf", + "dwarf.AttrCallFile": "debug/dwarf", + "dwarf.AttrCallLine": "debug/dwarf", + "dwarf.AttrCalling": "debug/dwarf", + "dwarf.AttrCommonRef": "debug/dwarf", + "dwarf.AttrCompDir": "debug/dwarf", + "dwarf.AttrConstValue": "debug/dwarf", + "dwarf.AttrContainingType": "debug/dwarf", + "dwarf.AttrCount": "debug/dwarf", + "dwarf.AttrDataLocation": "debug/dwarf", + "dwarf.AttrDataMemberLoc": "debug/dwarf", + "dwarf.AttrDeclColumn": "debug/dwarf", + "dwarf.AttrDeclFile": "debug/dwarf", + "dwarf.AttrDeclLine": "debug/dwarf", + "dwarf.AttrDeclaration": "debug/dwarf", + "dwarf.AttrDefaultValue": "debug/dwarf", + "dwarf.AttrDescription": "debug/dwarf", + "dwarf.AttrDiscr": "debug/dwarf", + "dwarf.AttrDiscrList": "debug/dwarf", + "dwarf.AttrDiscrValue": "debug/dwarf", + "dwarf.AttrEncoding": "debug/dwarf", + "dwarf.AttrEntrypc": "debug/dwarf", + "dwarf.AttrExtension": "debug/dwarf", + "dwarf.AttrExternal": "debug/dwarf", + "dwarf.AttrFrameBase": "debug/dwarf", + "dwarf.AttrFriend": "debug/dwarf", + "dwarf.AttrHighpc": "debug/dwarf", + "dwarf.AttrIdentifierCase": "debug/dwarf", + "dwarf.AttrImport": "debug/dwarf", + "dwarf.AttrInline": "debug/dwarf", + "dwarf.AttrIsOptional": "debug/dwarf", + "dwarf.AttrLanguage": "debug/dwarf", + "dwarf.AttrLocation": "debug/dwarf", + "dwarf.AttrLowerBound": "debug/dwarf", + "dwarf.AttrLowpc": "debug/dwarf", + "dwarf.AttrMacroInfo": "debug/dwarf", + "dwarf.AttrName": "debug/dwarf", + "dwarf.AttrNamelistItem": "debug/dwarf", + "dwarf.AttrOrdering": "debug/dwarf", + "dwarf.AttrPriority": "debug/dwarf", + "dwarf.AttrProducer": "debug/dwarf", + "dwarf.AttrPrototyped": "debug/dwarf", + "dwarf.AttrRanges": "debug/dwarf", + "dwarf.AttrReturnAddr": "debug/dwarf", + "dwarf.AttrSegment": "debug/dwarf", + "dwarf.AttrSibling": "debug/dwarf", + "dwarf.AttrSpecification": "debug/dwarf", + "dwarf.AttrStartScope": "debug/dwarf", + "dwarf.AttrStaticLink": "debug/dwarf", + "dwarf.AttrStmtList": "debug/dwarf", + "dwarf.AttrStride": "debug/dwarf", + "dwarf.AttrStrideSize": "debug/dwarf", + "dwarf.AttrStringLength": "debug/dwarf", + "dwarf.AttrTrampoline": "debug/dwarf", + "dwarf.AttrType": "debug/dwarf", + "dwarf.AttrUpperBound": "debug/dwarf", + "dwarf.AttrUseLocation": "debug/dwarf", + "dwarf.AttrUseUTF8": "debug/dwarf", + "dwarf.AttrVarParam": "debug/dwarf", + "dwarf.AttrVirtuality": "debug/dwarf", + "dwarf.AttrVisibility": "debug/dwarf", + "dwarf.AttrVtableElemLoc": "debug/dwarf", + "dwarf.BasicType": "debug/dwarf", + "dwarf.BoolType": "debug/dwarf", + "dwarf.CharType": "debug/dwarf", + "dwarf.CommonType": "debug/dwarf", + "dwarf.ComplexType": "debug/dwarf", + "dwarf.Data": "debug/dwarf", + "dwarf.DecodeError": "debug/dwarf", + "dwarf.DotDotDotType": "debug/dwarf", + "dwarf.Entry": "debug/dwarf", + "dwarf.EnumType": "debug/dwarf", + "dwarf.EnumValue": "debug/dwarf", + "dwarf.Field": "debug/dwarf", + "dwarf.FloatType": "debug/dwarf", + "dwarf.FuncType": "debug/dwarf", + "dwarf.IntType": "debug/dwarf", + "dwarf.New": "debug/dwarf", + "dwarf.Offset": "debug/dwarf", + "dwarf.PtrType": "debug/dwarf", + "dwarf.QualType": "debug/dwarf", + "dwarf.Reader": "debug/dwarf", + "dwarf.StructField": "debug/dwarf", + "dwarf.StructType": "debug/dwarf", + "dwarf.Tag": "debug/dwarf", + "dwarf.TagAccessDeclaration": "debug/dwarf", + "dwarf.TagArrayType": "debug/dwarf", + "dwarf.TagBaseType": "debug/dwarf", + "dwarf.TagCatchDwarfBlock": "debug/dwarf", + "dwarf.TagClassType": "debug/dwarf", + "dwarf.TagCommonDwarfBlock": "debug/dwarf", + "dwarf.TagCommonInclusion": "debug/dwarf", + "dwarf.TagCompileUnit": "debug/dwarf", + "dwarf.TagCondition": "debug/dwarf", + "dwarf.TagConstType": "debug/dwarf", + "dwarf.TagConstant": "debug/dwarf", + "dwarf.TagDwarfProcedure": "debug/dwarf", + "dwarf.TagEntryPoint": "debug/dwarf", + "dwarf.TagEnumerationType": "debug/dwarf", + "dwarf.TagEnumerator": "debug/dwarf", + "dwarf.TagFileType": "debug/dwarf", + "dwarf.TagFormalParameter": "debug/dwarf", + "dwarf.TagFriend": "debug/dwarf", + "dwarf.TagImportedDeclaration": "debug/dwarf", + 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"elf.R_SPARC_DISP32": "debug/elf", + "elf.R_SPARC_DISP64": "debug/elf", + "elf.R_SPARC_DISP8": "debug/elf", + "elf.R_SPARC_GLOB_DAT": "debug/elf", + "elf.R_SPARC_GLOB_JMP": "debug/elf", + "elf.R_SPARC_GOT10": "debug/elf", + "elf.R_SPARC_GOT13": "debug/elf", + "elf.R_SPARC_GOT22": "debug/elf", + "elf.R_SPARC_H44": "debug/elf", + "elf.R_SPARC_HH22": "debug/elf", + "elf.R_SPARC_HI22": "debug/elf", + "elf.R_SPARC_HIPLT22": "debug/elf", + "elf.R_SPARC_HIX22": "debug/elf", + "elf.R_SPARC_HM10": "debug/elf", + "elf.R_SPARC_JMP_SLOT": "debug/elf", + "elf.R_SPARC_L44": "debug/elf", + "elf.R_SPARC_LM22": "debug/elf", + "elf.R_SPARC_LO10": "debug/elf", + "elf.R_SPARC_LOPLT10": "debug/elf", + "elf.R_SPARC_LOX10": "debug/elf", + "elf.R_SPARC_M44": "debug/elf", + "elf.R_SPARC_NONE": "debug/elf", + "elf.R_SPARC_OLO10": "debug/elf", + "elf.R_SPARC_PC10": "debug/elf", + "elf.R_SPARC_PC22": "debug/elf", + "elf.R_SPARC_PCPLT10": "debug/elf", + "elf.R_SPARC_PCPLT22": "debug/elf", + "elf.R_SPARC_PCPLT32": "debug/elf", + "elf.R_SPARC_PC_HH22": "debug/elf", + "elf.R_SPARC_PC_HM10": "debug/elf", + "elf.R_SPARC_PC_LM22": "debug/elf", + "elf.R_SPARC_PLT32": "debug/elf", + "elf.R_SPARC_PLT64": "debug/elf", + "elf.R_SPARC_REGISTER": "debug/elf", + "elf.R_SPARC_RELATIVE": "debug/elf", + "elf.R_SPARC_UA16": "debug/elf", + "elf.R_SPARC_UA32": "debug/elf", + "elf.R_SPARC_UA64": "debug/elf", + "elf.R_SPARC_WDISP16": "debug/elf", + "elf.R_SPARC_WDISP19": "debug/elf", + "elf.R_SPARC_WDISP22": "debug/elf", + "elf.R_SPARC_WDISP30": "debug/elf", + "elf.R_SPARC_WPLT30": "debug/elf", + "elf.R_SYM32": "debug/elf", + "elf.R_SYM64": "debug/elf", + "elf.R_TYPE32": "debug/elf", + "elf.R_TYPE64": "debug/elf", + "elf.R_X86_64": "debug/elf", + "elf.R_X86_64_16": "debug/elf", + "elf.R_X86_64_32": "debug/elf", + "elf.R_X86_64_32S": "debug/elf", + "elf.R_X86_64_64": "debug/elf", + "elf.R_X86_64_8": "debug/elf", + "elf.R_X86_64_COPY": "debug/elf", + "elf.R_X86_64_DTPMOD64": "debug/elf", + "elf.R_X86_64_DTPOFF32": "debug/elf", + "elf.R_X86_64_DTPOFF64": "debug/elf", + "elf.R_X86_64_GLOB_DAT": "debug/elf", + "elf.R_X86_64_GOT32": "debug/elf", + "elf.R_X86_64_GOTPCREL": "debug/elf", + "elf.R_X86_64_GOTTPOFF": "debug/elf", + "elf.R_X86_64_JMP_SLOT": "debug/elf", + "elf.R_X86_64_NONE": "debug/elf", + "elf.R_X86_64_PC16": "debug/elf", + "elf.R_X86_64_PC32": "debug/elf", + "elf.R_X86_64_PC8": "debug/elf", + "elf.R_X86_64_PLT32": "debug/elf", + "elf.R_X86_64_RELATIVE": "debug/elf", + "elf.R_X86_64_TLSGD": "debug/elf", + "elf.R_X86_64_TLSLD": "debug/elf", + "elf.R_X86_64_TPOFF32": "debug/elf", + "elf.R_X86_64_TPOFF64": "debug/elf", + "elf.Rel32": "debug/elf", + "elf.Rel64": "debug/elf", + "elf.Rela32": "debug/elf", + "elf.Rela64": "debug/elf", + "elf.SHF_ALLOC": "debug/elf", + "elf.SHF_EXECINSTR": "debug/elf", + "elf.SHF_GROUP": "debug/elf", + "elf.SHF_INFO_LINK": "debug/elf", + "elf.SHF_LINK_ORDER": "debug/elf", + "elf.SHF_MASKOS": "debug/elf", + "elf.SHF_MASKPROC": "debug/elf", + "elf.SHF_MERGE": "debug/elf", + "elf.SHF_OS_NONCONFORMING": "debug/elf", + "elf.SHF_STRINGS": "debug/elf", + "elf.SHF_TLS": "debug/elf", + "elf.SHF_WRITE": "debug/elf", + "elf.SHN_ABS": "debug/elf", + "elf.SHN_COMMON": "debug/elf", + "elf.SHN_HIOS": "debug/elf", + "elf.SHN_HIPROC": "debug/elf", + "elf.SHN_HIRESERVE": "debug/elf", + "elf.SHN_LOOS": "debug/elf", + "elf.SHN_LOPROC": "debug/elf", + "elf.SHN_LORESERVE": "debug/elf", + "elf.SHN_UNDEF": "debug/elf", + "elf.SHN_XINDEX": "debug/elf", + "elf.SHT_DYNAMIC": "debug/elf", + "elf.SHT_DYNSYM": "debug/elf", + "elf.SHT_FINI_ARRAY": "debug/elf", + "elf.SHT_GNU_ATTRIBUTES": "debug/elf", + "elf.SHT_GNU_HASH": "debug/elf", + "elf.SHT_GNU_LIBLIST": "debug/elf", + "elf.SHT_GNU_VERDEF": "debug/elf", + "elf.SHT_GNU_VERNEED": "debug/elf", + "elf.SHT_GNU_VERSYM": "debug/elf", + "elf.SHT_GROUP": "debug/elf", + "elf.SHT_HASH": "debug/elf", + "elf.SHT_HIOS": "debug/elf", + "elf.SHT_HIPROC": "debug/elf", + "elf.SHT_HIUSER": "debug/elf", + "elf.SHT_INIT_ARRAY": "debug/elf", + "elf.SHT_LOOS": "debug/elf", + "elf.SHT_LOPROC": "debug/elf", + "elf.SHT_LOUSER": "debug/elf", + "elf.SHT_NOBITS": "debug/elf", + "elf.SHT_NOTE": "debug/elf", + "elf.SHT_NULL": "debug/elf", + "elf.SHT_PREINIT_ARRAY": "debug/elf", + "elf.SHT_PROGBITS": "debug/elf", + "elf.SHT_REL": "debug/elf", + "elf.SHT_RELA": "debug/elf", + "elf.SHT_SHLIB": "debug/elf", + "elf.SHT_STRTAB": "debug/elf", + "elf.SHT_SYMTAB": "debug/elf", + "elf.SHT_SYMTAB_SHNDX": "debug/elf", + "elf.STB_GLOBAL": "debug/elf", + "elf.STB_HIOS": "debug/elf", + "elf.STB_HIPROC": "debug/elf", + "elf.STB_LOCAL": "debug/elf", + "elf.STB_LOOS": "debug/elf", + "elf.STB_LOPROC": "debug/elf", + "elf.STB_WEAK": "debug/elf", + "elf.STT_COMMON": "debug/elf", + "elf.STT_FILE": "debug/elf", + "elf.STT_FUNC": "debug/elf", + "elf.STT_HIOS": "debug/elf", + "elf.STT_HIPROC": "debug/elf", + "elf.STT_LOOS": "debug/elf", + "elf.STT_LOPROC": "debug/elf", + "elf.STT_NOTYPE": "debug/elf", + "elf.STT_OBJECT": "debug/elf", + "elf.STT_SECTION": "debug/elf", + "elf.STT_TLS": "debug/elf", + "elf.STV_DEFAULT": "debug/elf", + "elf.STV_HIDDEN": "debug/elf", + "elf.STV_INTERNAL": "debug/elf", + "elf.STV_PROTECTED": "debug/elf", + "elf.ST_BIND": "debug/elf", + "elf.ST_INFO": "debug/elf", + "elf.ST_TYPE": "debug/elf", + "elf.ST_VISIBILITY": "debug/elf", + "elf.Section": "debug/elf", + "elf.Section32": "debug/elf", + "elf.Section64": "debug/elf", + "elf.SectionFlag": "debug/elf", + "elf.SectionHeader": "debug/elf", + "elf.SectionIndex": "debug/elf", + "elf.SectionType": "debug/elf", + "elf.Sym32": "debug/elf", + "elf.Sym32Size": "debug/elf", + "elf.Sym64": "debug/elf", + "elf.Sym64Size": "debug/elf", + "elf.SymBind": "debug/elf", + "elf.SymType": "debug/elf", + "elf.SymVis": "debug/elf", + "elf.Symbol": "debug/elf", + "elf.Type": "debug/elf", + "elf.Version": "debug/elf", + "elliptic.Curve": "crypto/elliptic", + "elliptic.CurveParams": "crypto/elliptic", + "elliptic.GenerateKey": "crypto/elliptic", + "elliptic.Marshal": "crypto/elliptic", + "elliptic.P224": "crypto/elliptic", + "elliptic.P256": "crypto/elliptic", + "elliptic.P384": "crypto/elliptic", + "elliptic.P521": "crypto/elliptic", + "elliptic.Unmarshal": "crypto/elliptic", + "encoding.BinaryMarshaler": "encoding", + "encoding.BinaryUnmarshaler": "encoding", + "encoding.TextMarshaler": "encoding", + "encoding.TextUnmarshaler": "encoding", + "errors.New": "errors", + "exec.Cmd": "os/exec", + "exec.Command": "os/exec", + "exec.ErrNotFound": "os/exec", + "exec.Error": "os/exec", + "exec.ExitError": "os/exec", + "exec.LookPath": "os/exec", + "expvar.Do": "expvar", + "expvar.Float": "expvar", + "expvar.Func": "expvar", + "expvar.Get": "expvar", + "expvar.Int": "expvar", + "expvar.KeyValue": "expvar", + "expvar.Map": "expvar", + "expvar.NewFloat": "expvar", + "expvar.NewInt": "expvar", + "expvar.NewMap": "expvar", + "expvar.NewString": "expvar", + "expvar.Publish": "expvar", + "expvar.String": "expvar", + "expvar.Var": "expvar", + "fcgi.Serve": "net/http/fcgi", + "filepath.Abs": "path/filepath", + "filepath.Base": "path/filepath", + "filepath.Clean": "path/filepath", + "filepath.Dir": "path/filepath", + "filepath.ErrBadPattern": "path/filepath", + "filepath.EvalSymlinks": "path/filepath", + "filepath.Ext": "path/filepath", + "filepath.FromSlash": "path/filepath", + "filepath.Glob": "path/filepath", + "filepath.HasPrefix": "path/filepath", + "filepath.IsAbs": "path/filepath", + "filepath.Join": "path/filepath", + "filepath.ListSeparator": "path/filepath", + "filepath.Match": "path/filepath", + "filepath.Rel": "path/filepath", + "filepath.Separator": "path/filepath", + "filepath.SkipDir": "path/filepath", + "filepath.Split": "path/filepath", + "filepath.SplitList": "path/filepath", + "filepath.ToSlash": "path/filepath", + "filepath.VolumeName": "path/filepath", + "filepath.Walk": "path/filepath", + "filepath.WalkFunc": "path/filepath", + "flag.Arg": "flag", + "flag.Args": "flag", + "flag.Bool": "flag", + "flag.BoolVar": "flag", + "flag.CommandLine": "flag", + "flag.ContinueOnError": "flag", + "flag.Duration": "flag", + "flag.DurationVar": "flag", + "flag.ErrHelp": "flag", + "flag.ErrorHandling": "flag", + "flag.ExitOnError": "flag", + "flag.Flag": "flag", + "flag.FlagSet": "flag", + "flag.Float64": "flag", + "flag.Float64Var": "flag", + "flag.Getter": "flag", + "flag.Int": "flag", + "flag.Int64": "flag", + "flag.Int64Var": "flag", + "flag.IntVar": "flag", + "flag.Lookup": "flag", + "flag.NArg": "flag", + "flag.NFlag": "flag", + "flag.NewFlagSet": "flag", + "flag.PanicOnError": "flag", + "flag.Parse": "flag", + "flag.Parsed": "flag", + "flag.PrintDefaults": "flag", + "flag.Set": "flag", + "flag.String": "flag", + "flag.StringVar": "flag", + "flag.Uint": "flag", + "flag.Uint64": "flag", + "flag.Uint64Var": "flag", + "flag.UintVar": "flag", + "flag.Usage": "flag", + "flag.Value": "flag", + "flag.Var": "flag", + "flag.Visit": "flag", + "flag.VisitAll": "flag", + "flate.BestCompression": "compress/flate", + "flate.BestSpeed": "compress/flate", + "flate.CorruptInputError": "compress/flate", + "flate.DefaultCompression": "compress/flate", + "flate.InternalError": "compress/flate", + "flate.NewReader": "compress/flate", + "flate.NewReaderDict": "compress/flate", + "flate.NewWriter": "compress/flate", + "flate.NewWriterDict": "compress/flate", + "flate.NoCompression": "compress/flate", + "flate.ReadError": "compress/flate", + "flate.Reader": "compress/flate", + "flate.WriteError": "compress/flate", + "flate.Writer": "compress/flate", + "fmt.Errorf": "fmt", + "fmt.Formatter": "fmt", + "fmt.Fprint": "fmt", + "fmt.Fprintf": "fmt", + "fmt.Fprintln": "fmt", + "fmt.Fscan": "fmt", + "fmt.Fscanf": "fmt", + "fmt.Fscanln": "fmt", + "fmt.GoStringer": "fmt", + "fmt.Print": "fmt", + "fmt.Printf": "fmt", + "fmt.Println": "fmt", + "fmt.Scan": "fmt", + "fmt.ScanState": "fmt", + "fmt.Scanf": "fmt", + "fmt.Scanln": "fmt", + "fmt.Scanner": "fmt", + "fmt.Sprint": "fmt", + "fmt.Sprintf": "fmt", + "fmt.Sprintln": "fmt", + "fmt.Sscan": "fmt", + "fmt.Sscanf": "fmt", + "fmt.Sscanln": "fmt", + "fmt.State": "fmt", + "fmt.Stringer": "fmt", + "fnv.New32": "hash/fnv", + "fnv.New32a": "hash/fnv", + "fnv.New64": "hash/fnv", + "fnv.New64a": "hash/fnv", + "format.Node": "go/format", + "format.Source": "go/format", + "gif.Decode": "image/gif", + "gif.DecodeAll": "image/gif", + "gif.DecodeConfig": "image/gif", + "gif.Encode": "image/gif", + "gif.EncodeAll": "image/gif", + "gif.GIF": "image/gif", + "gif.Options": "image/gif", + "gob.CommonType": "encoding/gob", + "gob.Decoder": "encoding/gob", + "gob.Encoder": "encoding/gob", + "gob.GobDecoder": "encoding/gob", + "gob.GobEncoder": "encoding/gob", + "gob.NewDecoder": "encoding/gob", + "gob.NewEncoder": "encoding/gob", + "gob.Register": "encoding/gob", + "gob.RegisterName": "encoding/gob", + "gosym.DecodingError": "debug/gosym", + "gosym.Func": "debug/gosym", + "gosym.LineTable": "debug/gosym", + "gosym.NewLineTable": "debug/gosym", + "gosym.NewTable": "debug/gosym", + "gosym.Obj": "debug/gosym", + "gosym.Sym": "debug/gosym", + "gosym.Table": "debug/gosym", + "gosym.UnknownFileError": "debug/gosym", + "gosym.UnknownLineError": "debug/gosym", + "gzip.BestCompression": "compress/gzip", + "gzip.BestSpeed": "compress/gzip", + "gzip.DefaultCompression": "compress/gzip", + "gzip.ErrChecksum": "compress/gzip", + "gzip.ErrHeader": "compress/gzip", + "gzip.Header": "compress/gzip", + "gzip.NewReader": "compress/gzip", + "gzip.NewWriter": "compress/gzip", + "gzip.NewWriterLevel": "compress/gzip", + "gzip.NoCompression": "compress/gzip", + "gzip.Reader": "compress/gzip", + "gzip.Writer": "compress/gzip", + "hash.Hash": "hash", + "hash.Hash32": "hash", + "hash.Hash64": "hash", + "heap.Fix": "container/heap", + "heap.Init": "container/heap", + "heap.Interface": "container/heap", + "heap.Pop": "container/heap", + "heap.Push": "container/heap", + "heap.Remove": "container/heap", + "hex.Decode": "encoding/hex", + "hex.DecodeString": "encoding/hex", + "hex.DecodedLen": "encoding/hex", + "hex.Dump": "encoding/hex", + "hex.Dumper": "encoding/hex", + "hex.Encode": "encoding/hex", + "hex.EncodeToString": "encoding/hex", + "hex.EncodedLen": "encoding/hex", + "hex.ErrLength": "encoding/hex", + "hex.InvalidByteError": "encoding/hex", + "hmac.Equal": "crypto/hmac", + "hmac.New": "crypto/hmac", + "html.EscapeString": "html", + "html.UnescapeString": "html", + "http.CanonicalHeaderKey": "net/http", + "http.Client": "net/http", + "http.CloseNotifier": "net/http", + "http.ConnState": "net/http", + "http.Cookie": "net/http", + "http.CookieJar": "net/http", + "http.DefaultClient": "net/http", + "http.DefaultMaxHeaderBytes": "net/http", + "http.DefaultMaxIdleConnsPerHost": "net/http", + "http.DefaultServeMux": "net/http", + "http.DefaultTransport": "net/http", + "http.DetectContentType": "net/http", + "http.Dir": "net/http", + "http.ErrBodyNotAllowed": "net/http", + "http.ErrBodyReadAfterClose": "net/http", + "http.ErrContentLength": "net/http", + "http.ErrHandlerTimeout": "net/http", + "http.ErrHeaderTooLong": "net/http", + "http.ErrHijacked": "net/http", + "http.ErrLineTooLong": "net/http", + "http.ErrMissingBoundary": "net/http", + "http.ErrMissingContentLength": "net/http", + "http.ErrMissingFile": "net/http", + "http.ErrNoCookie": "net/http", + "http.ErrNoLocation": "net/http", + "http.ErrNotMultipart": "net/http", + "http.ErrNotSupported": "net/http", + "http.ErrShortBody": "net/http", + "http.ErrUnexpectedTrailer": "net/http", + "http.ErrWriteAfterFlush": "net/http", + "http.Error": "net/http", + "http.File": "net/http", + "http.FileServer": "net/http", + "http.FileSystem": "net/http", + "http.Flusher": "net/http", + "http.Get": "net/http", + "http.Handle": "net/http", + "http.HandleFunc": "net/http", + "http.Handler": "net/http", + "http.HandlerFunc": "net/http", + "http.Head": "net/http", + "http.Header": "net/http", + "http.Hijacker": "net/http", + "http.ListenAndServe": "net/http", + "http.ListenAndServeTLS": "net/http", + "http.MaxBytesReader": "net/http", + "http.NewFileTransport": "net/http", + "http.NewRequest": "net/http", + "http.NewServeMux": "net/http", + "http.NotFound": "net/http", + "http.NotFoundHandler": "net/http", + "http.ParseHTTPVersion": "net/http", + "http.ParseTime": "net/http", + "http.Post": "net/http", + "http.PostForm": "net/http", + "http.ProtocolError": "net/http", + "http.ProxyFromEnvironment": "net/http", + "http.ProxyURL": "net/http", + "http.ReadRequest": "net/http", + "http.ReadResponse": "net/http", + "http.Redirect": "net/http", + "http.RedirectHandler": "net/http", + "http.Request": "net/http", + "http.Response": "net/http", + "http.ResponseWriter": "net/http", + "http.RoundTripper": "net/http", + "http.Serve": "net/http", + "http.ServeContent": "net/http", + "http.ServeFile": "net/http", + "http.ServeMux": "net/http", + "http.Server": "net/http", + "http.SetCookie": "net/http", + "http.StateActive": "net/http", + "http.StateClosed": "net/http", + "http.StateHijacked": "net/http", + "http.StateIdle": "net/http", + "http.StateNew": "net/http", + "http.StatusAccepted": "net/http", + "http.StatusBadGateway": "net/http", + "http.StatusBadRequest": "net/http", + "http.StatusConflict": "net/http", + "http.StatusContinue": "net/http", + "http.StatusCreated": "net/http", + "http.StatusExpectationFailed": "net/http", + "http.StatusForbidden": "net/http", + "http.StatusFound": "net/http", + "http.StatusGatewayTimeout": "net/http", + "http.StatusGone": "net/http", + "http.StatusHTTPVersionNotSupported": "net/http", + "http.StatusInternalServerError": "net/http", + "http.StatusLengthRequired": "net/http", + "http.StatusMethodNotAllowed": "net/http", + "http.StatusMovedPermanently": "net/http", + "http.StatusMultipleChoices": "net/http", + "http.StatusNoContent": "net/http", + "http.StatusNonAuthoritativeInfo": "net/http", + "http.StatusNotAcceptable": "net/http", + "http.StatusNotFound": "net/http", + "http.StatusNotImplemented": "net/http", + "http.StatusNotModified": "net/http", + "http.StatusOK": "net/http", + "http.StatusPartialContent": "net/http", + "http.StatusPaymentRequired": "net/http", + "http.StatusPreconditionFailed": "net/http", + "http.StatusProxyAuthRequired": "net/http", + "http.StatusRequestEntityTooLarge": "net/http", + "http.StatusRequestTimeout": "net/http", + "http.StatusRequestURITooLong": "net/http", + "http.StatusRequestedRangeNotSatisfiable": "net/http", + "http.StatusResetContent": "net/http", + "http.StatusSeeOther": "net/http", + "http.StatusServiceUnavailable": "net/http", + "http.StatusSwitchingProtocols": "net/http", + "http.StatusTeapot": "net/http", + "http.StatusTemporaryRedirect": "net/http", + "http.StatusText": "net/http", + "http.StatusUnauthorized": "net/http", + "http.StatusUnsupportedMediaType": "net/http", + "http.StatusUseProxy": "net/http", + "http.StripPrefix": "net/http", + "http.TimeFormat": "net/http", + "http.TimeoutHandler": "net/http", + "http.Transport": "net/http", + "httptest.DefaultRemoteAddr": "net/http/httptest", + "httptest.NewRecorder": "net/http/httptest", + "httptest.NewServer": "net/http/httptest", + "httptest.NewTLSServer": "net/http/httptest", + "httptest.NewUnstartedServer": "net/http/httptest", + "httptest.ResponseRecorder": "net/http/httptest", + "httptest.Server": "net/http/httptest", + "httputil.ClientConn": "net/http/httputil", + "httputil.DumpRequest": "net/http/httputil", + "httputil.DumpRequestOut": "net/http/httputil", + "httputil.DumpResponse": "net/http/httputil", + "httputil.ErrClosed": "net/http/httputil", + "httputil.ErrLineTooLong": "net/http/httputil", + "httputil.ErrPersistEOF": "net/http/httputil", + "httputil.ErrPipeline": "net/http/httputil", + "httputil.NewChunkedReader": "net/http/httputil", + "httputil.NewChunkedWriter": "net/http/httputil", + "httputil.NewClientConn": "net/http/httputil", + "httputil.NewProxyClientConn": "net/http/httputil", + "httputil.NewServerConn": "net/http/httputil", + "httputil.NewSingleHostReverseProxy": "net/http/httputil", + "httputil.ReverseProxy": "net/http/httputil", + "httputil.ServerConn": "net/http/httputil", + "image.Alpha": "image", + "image.Alpha16": "image", + "image.Black": "image", + "image.Config": "image", + "image.Decode": "image", + "image.DecodeConfig": "image", + "image.ErrFormat": "image", + "image.Gray": "image", + "image.Gray16": "image", + "image.Image": "image", + "image.NRGBA": "image", + "image.NRGBA64": "image", + "image.NewAlpha": "image", + "image.NewAlpha16": "image", + "image.NewGray": "image", + "image.NewGray16": "image", + "image.NewNRGBA": "image", + "image.NewNRGBA64": "image", + "image.NewPaletted": "image", + "image.NewRGBA": "image", + "image.NewRGBA64": "image", + "image.NewUniform": "image", + "image.NewYCbCr": "image", + "image.Opaque": "image", + "image.Paletted": "image", + "image.PalettedImage": "image", + "image.Point": "image", + "image.Pt": "image", + "image.RGBA": "image", + "image.RGBA64": "image", + "image.Rect": "image", + "image.Rectangle": "image", + "image.RegisterFormat": "image", + "image.Transparent": "image", + "image.Uniform": "image", + "image.White": "image", + "image.YCbCr": "image", + "image.YCbCrSubsampleRatio": "image", + "image.YCbCrSubsampleRatio420": "image", + "image.YCbCrSubsampleRatio422": "image", + "image.YCbCrSubsampleRatio440": "image", + "image.YCbCrSubsampleRatio444": "image", + "image.ZP": "image", + "image.ZR": "image", + "io.ByteReader": "io", + "io.ByteScanner": "io", + "io.ByteWriter": "io", + "io.Closer": "io", + "io.Copy": "io", + "io.CopyN": "io", + "io.EOF": "io", + "io.ErrClosedPipe": "io", + "io.ErrNoProgress": "io", + "io.ErrShortBuffer": "io", + "io.ErrShortWrite": "io", + "io.ErrUnexpectedEOF": "io", + "io.LimitReader": "io", + "io.LimitedReader": "io", + "io.MultiReader": "io", + "io.MultiWriter": "io", + "io.NewSectionReader": "io", + "io.Pipe": "io", + "io.PipeReader": "io", + 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"pe.IMAGE_FILE_MACHINE_ARM": "debug/pe", + "pe.IMAGE_FILE_MACHINE_EBC": "debug/pe", + "pe.IMAGE_FILE_MACHINE_I386": "debug/pe", + "pe.IMAGE_FILE_MACHINE_IA64": "debug/pe", + "pe.IMAGE_FILE_MACHINE_M32R": "debug/pe", + "pe.IMAGE_FILE_MACHINE_MIPS16": "debug/pe", + "pe.IMAGE_FILE_MACHINE_MIPSFPU": "debug/pe", + "pe.IMAGE_FILE_MACHINE_MIPSFPU16": "debug/pe", + "pe.IMAGE_FILE_MACHINE_POWERPC": "debug/pe", + "pe.IMAGE_FILE_MACHINE_POWERPCFP": "debug/pe", + "pe.IMAGE_FILE_MACHINE_R4000": "debug/pe", + "pe.IMAGE_FILE_MACHINE_SH3": "debug/pe", + "pe.IMAGE_FILE_MACHINE_SH3DSP": "debug/pe", + "pe.IMAGE_FILE_MACHINE_SH4": "debug/pe", + "pe.IMAGE_FILE_MACHINE_SH5": "debug/pe", + "pe.IMAGE_FILE_MACHINE_THUMB": "debug/pe", + "pe.IMAGE_FILE_MACHINE_UNKNOWN": "debug/pe", + "pe.IMAGE_FILE_MACHINE_WCEMIPSV2": "debug/pe", + "pe.ImportDirectory": "debug/pe", + "pe.NewFile": "debug/pe", + "pe.Open": "debug/pe", + "pe.OptionalHeader32": "debug/pe", + "pe.OptionalHeader64": "debug/pe", + "pe.Section": "debug/pe", + "pe.SectionHeader": "debug/pe", + "pe.SectionHeader32": "debug/pe", + "pe.Symbol": "debug/pe", + "pem.Block": "encoding/pem", + "pem.Decode": "encoding/pem", + "pem.Encode": "encoding/pem", + "pem.EncodeToMemory": "encoding/pem", + "pkix.AlgorithmIdentifier": "crypto/x509/pkix", + "pkix.AttributeTypeAndValue": "crypto/x509/pkix", + "pkix.AttributeTypeAndValueSET": "crypto/x509/pkix", + "pkix.CertificateList": "crypto/x509/pkix", + "pkix.Extension": "crypto/x509/pkix", + "pkix.Name": "crypto/x509/pkix", + "pkix.RDNSequence": "crypto/x509/pkix", + "pkix.RelativeDistinguishedNameSET": "crypto/x509/pkix", + "pkix.RevokedCertificate": "crypto/x509/pkix", + "pkix.TBSCertificateList": "crypto/x509/pkix", + "plan9obj.File": "debug/plan9obj", + "plan9obj.FileHeader": "debug/plan9obj", + "plan9obj.Magic386": "debug/plan9obj", + "plan9obj.Magic64": "debug/plan9obj", + "plan9obj.MagicAMD64": "debug/plan9obj", + "plan9obj.MagicARM": "debug/plan9obj", + "plan9obj.NewFile": "debug/plan9obj", + "plan9obj.Open": "debug/plan9obj", + "plan9obj.Section": "debug/plan9obj", + "plan9obj.SectionHeader": "debug/plan9obj", + "plan9obj.Sym": "debug/plan9obj", + "png.Decode": "image/png", + "png.DecodeConfig": "image/png", + "png.Encode": "image/png", + "png.FormatError": "image/png", + "png.UnsupportedError": "image/png", + "pprof.Cmdline": "net/http/pprof", + "pprof.Handler": "net/http/pprof", + "pprof.Index": "net/http/pprof", + "pprof.Lookup": "runtime/pprof", + "pprof.NewProfile": "runtime/pprof", + // "pprof.Profile" is ambiguous + "pprof.Profiles": "runtime/pprof", + "pprof.StartCPUProfile": "runtime/pprof", + "pprof.StopCPUProfile": "runtime/pprof", + "pprof.Symbol": "net/http/pprof", + "pprof.WriteHeapProfile": "runtime/pprof", + "printer.CommentedNode": "go/printer", + "printer.Config": "go/printer", + "printer.Fprint": "go/printer", + "printer.Mode": "go/printer", + "printer.RawFormat": "go/printer", + "printer.SourcePos": "go/printer", + "printer.TabIndent": "go/printer", + "printer.UseSpaces": "go/printer", + "quick.Check": "testing/quick", + "quick.CheckEqual": "testing/quick", + "quick.CheckEqualError": "testing/quick", + "quick.CheckError": "testing/quick", + "quick.Config": "testing/quick", + "quick.Generator": "testing/quick", + "quick.SetupError": "testing/quick", + "quick.Value": "testing/quick", + "rand.ExpFloat64": "math/rand", + "rand.Float32": "math/rand", + "rand.Float64": "math/rand", + // "rand.Int" is ambiguous + "rand.Int31": "math/rand", + "rand.Int31n": "math/rand", + "rand.Int63": "math/rand", + "rand.Int63n": "math/rand", + "rand.Intn": "math/rand", + "rand.New": "math/rand", + "rand.NewSource": "math/rand", + "rand.NewZipf": "math/rand", + "rand.NormFloat64": "math/rand", + "rand.Perm": "math/rand", + "rand.Prime": "crypto/rand", + "rand.Rand": "math/rand", + "rand.Read": "crypto/rand", + "rand.Reader": "crypto/rand", + "rand.Seed": "math/rand", + "rand.Source": "math/rand", + "rand.Uint32": "math/rand", + "rand.Zipf": "math/rand", + "rc4.Cipher": "crypto/rc4", + "rc4.KeySizeError": "crypto/rc4", + "rc4.NewCipher": "crypto/rc4", + "reflect.Append": "reflect", + "reflect.AppendSlice": "reflect", + "reflect.Array": "reflect", + "reflect.Bool": "reflect", + "reflect.BothDir": "reflect", + "reflect.Chan": "reflect", + "reflect.ChanDir": "reflect", + "reflect.ChanOf": "reflect", + "reflect.Complex128": "reflect", + "reflect.Complex64": "reflect", + "reflect.Copy": "reflect", + "reflect.DeepEqual": "reflect", + "reflect.Float32": "reflect", + "reflect.Float64": "reflect", + "reflect.Func": "reflect", + "reflect.Indirect": "reflect", + "reflect.Int": "reflect", + "reflect.Int16": "reflect", + "reflect.Int32": "reflect", + "reflect.Int64": "reflect", + "reflect.Int8": "reflect", + "reflect.Interface": "reflect", + "reflect.Invalid": "reflect", + "reflect.Kind": "reflect", + "reflect.MakeChan": "reflect", + "reflect.MakeFunc": "reflect", + "reflect.MakeMap": "reflect", + "reflect.MakeSlice": "reflect", + "reflect.Map": "reflect", + "reflect.MapOf": "reflect", + "reflect.Method": "reflect", + "reflect.New": "reflect", + "reflect.NewAt": "reflect", + "reflect.Ptr": "reflect", + "reflect.PtrTo": "reflect", + "reflect.RecvDir": "reflect", + "reflect.Select": "reflect", + "reflect.SelectCase": "reflect", + "reflect.SelectDefault": "reflect", + "reflect.SelectDir": "reflect", + "reflect.SelectRecv": "reflect", + "reflect.SelectSend": "reflect", + "reflect.SendDir": "reflect", + "reflect.Slice": "reflect", + "reflect.SliceHeader": "reflect", + "reflect.SliceOf": "reflect", + "reflect.String": "reflect", + "reflect.StringHeader": "reflect", + "reflect.Struct": "reflect", + "reflect.StructField": "reflect", + "reflect.StructTag": "reflect", + "reflect.TypeOf": "reflect", + "reflect.Uint": "reflect", + "reflect.Uint16": "reflect", + "reflect.Uint32": "reflect", + "reflect.Uint64": "reflect", + "reflect.Uint8": "reflect", + "reflect.Uintptr": "reflect", + "reflect.UnsafePointer": "reflect", + "reflect.Value": "reflect", + "reflect.ValueError": "reflect", + "reflect.ValueOf": "reflect", + "reflect.Zero": "reflect", + "regexp.Compile": "regexp", + "regexp.CompilePOSIX": "regexp", + "regexp.Match": "regexp", + "regexp.MatchReader": "regexp", + "regexp.MatchString": "regexp", + "regexp.MustCompile": "regexp", + "regexp.MustCompilePOSIX": "regexp", + "regexp.QuoteMeta": "regexp", + "regexp.Regexp": "regexp", + "ring.New": "container/ring", + "ring.Ring": "container/ring", + "rpc.Accept": "net/rpc", + "rpc.Call": "net/rpc", + "rpc.Client": "net/rpc", + "rpc.ClientCodec": "net/rpc", + "rpc.DefaultDebugPath": "net/rpc", + "rpc.DefaultRPCPath": "net/rpc", + "rpc.DefaultServer": "net/rpc", + "rpc.Dial": "net/rpc", + "rpc.DialHTTP": "net/rpc", + "rpc.DialHTTPPath": "net/rpc", + "rpc.ErrShutdown": "net/rpc", + "rpc.HandleHTTP": "net/rpc", + "rpc.NewClient": "net/rpc", + "rpc.NewClientWithCodec": "net/rpc", + "rpc.NewServer": "net/rpc", + "rpc.Register": "net/rpc", + "rpc.RegisterName": "net/rpc", + "rpc.Request": "net/rpc", + "rpc.Response": "net/rpc", + "rpc.ServeCodec": "net/rpc", + "rpc.ServeConn": "net/rpc", + "rpc.ServeRequest": "net/rpc", + "rpc.Server": "net/rpc", + "rpc.ServerCodec": "net/rpc", + "rpc.ServerError": "net/rpc", + "rsa.CRTValue": "crypto/rsa", + "rsa.DecryptOAEP": "crypto/rsa", + "rsa.DecryptPKCS1v15": "crypto/rsa", + "rsa.DecryptPKCS1v15SessionKey": "crypto/rsa", + "rsa.EncryptOAEP": "crypto/rsa", + "rsa.EncryptPKCS1v15": "crypto/rsa", + "rsa.ErrDecryption": "crypto/rsa", + "rsa.ErrMessageTooLong": "crypto/rsa", + "rsa.ErrVerification": "crypto/rsa", + "rsa.GenerateKey": "crypto/rsa", + "rsa.GenerateMultiPrimeKey": "crypto/rsa", + "rsa.PSSOptions": "crypto/rsa", + "rsa.PSSSaltLengthAuto": "crypto/rsa", + "rsa.PSSSaltLengthEqualsHash": "crypto/rsa", + "rsa.PrecomputedValues": "crypto/rsa", + "rsa.PrivateKey": "crypto/rsa", + "rsa.PublicKey": "crypto/rsa", + "rsa.SignPKCS1v15": "crypto/rsa", + "rsa.SignPSS": "crypto/rsa", + "rsa.VerifyPKCS1v15": "crypto/rsa", + "rsa.VerifyPSS": "crypto/rsa", + "runtime.BlockProfile": "runtime", + "runtime.BlockProfileRecord": "runtime", + "runtime.Breakpoint": "runtime", + "runtime.CPUProfile": "runtime", + "runtime.Caller": "runtime", + "runtime.Callers": "runtime", + "runtime.Compiler": "runtime", + "runtime.Error": "runtime", + "runtime.Func": "runtime", + "runtime.FuncForPC": "runtime", + "runtime.GC": "runtime", + "runtime.GOARCH": "runtime", + "runtime.GOMAXPROCS": "runtime", + "runtime.GOOS": "runtime", + "runtime.GOROOT": "runtime", + "runtime.Goexit": "runtime", + "runtime.GoroutineProfile": "runtime", + "runtime.Gosched": "runtime", + "runtime.LockOSThread": "runtime", + "runtime.MemProfile": "runtime", + "runtime.MemProfileRate": "runtime", + "runtime.MemProfileRecord": "runtime", + "runtime.MemStats": "runtime", + "runtime.NumCPU": "runtime", + "runtime.NumCgoCall": "runtime", + "runtime.NumGoroutine": "runtime", + "runtime.ReadMemStats": "runtime", + "runtime.SetBlockProfileRate": "runtime", + "runtime.SetCPUProfileRate": "runtime", + "runtime.SetFinalizer": "runtime", + "runtime.Stack": "runtime", + "runtime.StackRecord": "runtime", + "runtime.ThreadCreateProfile": "runtime", + "runtime.TypeAssertionError": "runtime", + "runtime.UnlockOSThread": "runtime", + "runtime.Version": "runtime", + "scanner.Char": "text/scanner", + "scanner.Comment": "text/scanner", + "scanner.EOF": "text/scanner", + "scanner.Error": "go/scanner", + "scanner.ErrorHandler": "go/scanner", + "scanner.ErrorList": "go/scanner", + "scanner.Float": "text/scanner", + "scanner.GoTokens": "text/scanner", + "scanner.GoWhitespace": "text/scanner", + "scanner.Ident": "text/scanner", + "scanner.Int": "text/scanner", + "scanner.Mode": "go/scanner", + "scanner.Position": "text/scanner", + "scanner.PrintError": "go/scanner", + "scanner.RawString": "text/scanner", + "scanner.ScanChars": "text/scanner", + // "scanner.ScanComments" is ambiguous + "scanner.ScanFloats": "text/scanner", + "scanner.ScanIdents": "text/scanner", + "scanner.ScanInts": "text/scanner", + "scanner.ScanRawStrings": "text/scanner", + "scanner.ScanStrings": "text/scanner", + // "scanner.Scanner" is ambiguous + "scanner.SkipComments": "text/scanner", + "scanner.String": "text/scanner", + "scanner.TokenString": "text/scanner", + "sha1.BlockSize": "crypto/sha1", + "sha1.New": "crypto/sha1", + "sha1.Size": "crypto/sha1", + "sha1.Sum": "crypto/sha1", + "sha256.BlockSize": "crypto/sha256", + "sha256.New": "crypto/sha256", + "sha256.New224": "crypto/sha256", + "sha256.Size": "crypto/sha256", + "sha256.Size224": "crypto/sha256", + "sha256.Sum224": "crypto/sha256", + "sha256.Sum256": "crypto/sha256", + "sha512.BlockSize": "crypto/sha512", + "sha512.New": "crypto/sha512", + "sha512.New384": "crypto/sha512", + "sha512.Size": "crypto/sha512", + "sha512.Size384": "crypto/sha512", + "sha512.Sum384": "crypto/sha512", + "sha512.Sum512": "crypto/sha512", + "signal.Notify": "os/signal", + "signal.Stop": "os/signal", + "smtp.Auth": "net/smtp", + "smtp.CRAMMD5Auth": "net/smtp", + "smtp.Client": "net/smtp", + "smtp.Dial": "net/smtp", + "smtp.NewClient": "net/smtp", + "smtp.PlainAuth": "net/smtp", + "smtp.SendMail": "net/smtp", + "smtp.ServerInfo": "net/smtp", + "sort.Float64Slice": "sort", + "sort.Float64s": "sort", + "sort.Float64sAreSorted": "sort", + "sort.IntSlice": "sort", + "sort.Interface": "sort", + "sort.Ints": "sort", + "sort.IntsAreSorted": "sort", + "sort.IsSorted": "sort", + "sort.Reverse": "sort", + "sort.Search": "sort", + "sort.SearchFloat64s": "sort", + "sort.SearchInts": "sort", + "sort.SearchStrings": "sort", + "sort.Sort": "sort", + "sort.Stable": "sort", + "sort.StringSlice": "sort", + "sort.Strings": "sort", + "sort.StringsAreSorted": "sort", + "sql.DB": "database/sql", + "sql.ErrNoRows": "database/sql", + "sql.ErrTxDone": "database/sql", + "sql.NullBool": "database/sql", + "sql.NullFloat64": "database/sql", + "sql.NullInt64": "database/sql", + "sql.NullString": "database/sql", + "sql.Open": "database/sql", + "sql.RawBytes": "database/sql", + "sql.Register": "database/sql", + "sql.Result": "database/sql", + "sql.Row": "database/sql", + "sql.Rows": "database/sql", + "sql.Scanner": "database/sql", + "sql.Stmt": "database/sql", + "sql.Tx": "database/sql", + "strconv.AppendBool": "strconv", + "strconv.AppendFloat": "strconv", + "strconv.AppendInt": "strconv", + "strconv.AppendQuote": "strconv", + "strconv.AppendQuoteRune": "strconv", + "strconv.AppendQuoteRuneToASCII": "strconv", + "strconv.AppendQuoteToASCII": "strconv", + "strconv.AppendUint": "strconv", + "strconv.Atoi": "strconv", + "strconv.CanBackquote": "strconv", + "strconv.ErrRange": "strconv", + "strconv.ErrSyntax": "strconv", + "strconv.FormatBool": "strconv", + "strconv.FormatFloat": "strconv", + "strconv.FormatInt": "strconv", + "strconv.FormatUint": "strconv", + "strconv.IntSize": "strconv", + "strconv.IsPrint": "strconv", + "strconv.Itoa": "strconv", + "strconv.NumError": "strconv", + "strconv.ParseBool": "strconv", + "strconv.ParseFloat": "strconv", + "strconv.ParseInt": "strconv", + "strconv.ParseUint": "strconv", + "strconv.Quote": "strconv", + "strconv.QuoteRune": "strconv", + "strconv.QuoteRuneToASCII": "strconv", + "strconv.QuoteToASCII": "strconv", + "strconv.Unquote": "strconv", + "strconv.UnquoteChar": "strconv", + "strings.Contains": "strings", + "strings.ContainsAny": "strings", + "strings.ContainsRune": "strings", + "strings.Count": "strings", + "strings.EqualFold": "strings", + "strings.Fields": "strings", + "strings.FieldsFunc": "strings", + "strings.HasPrefix": "strings", + "strings.HasSuffix": "strings", + "strings.Index": "strings", + "strings.IndexAny": "strings", + "strings.IndexByte": "strings", + "strings.IndexFunc": "strings", + "strings.IndexRune": "strings", + "strings.Join": "strings", + "strings.LastIndex": "strings", + "strings.LastIndexAny": "strings", + "strings.LastIndexFunc": "strings", + "strings.Map": "strings", + "strings.NewReader": "strings", + "strings.NewReplacer": "strings", + "strings.Reader": "strings", + "strings.Repeat": "strings", + "strings.Replace": "strings", + "strings.Replacer": "strings", + "strings.Split": "strings", + "strings.SplitAfter": "strings", + "strings.SplitAfterN": "strings", + "strings.SplitN": "strings", + "strings.Title": "strings", + "strings.ToLower": "strings", + "strings.ToLowerSpecial": "strings", + "strings.ToTitle": "strings", + "strings.ToTitleSpecial": "strings", + "strings.ToUpper": "strings", + "strings.ToUpperSpecial": "strings", + "strings.Trim": "strings", + "strings.TrimFunc": "strings", + "strings.TrimLeft": "strings", + "strings.TrimLeftFunc": "strings", + "strings.TrimPrefix": "strings", + "strings.TrimRight": "strings", + "strings.TrimRightFunc": "strings", + "strings.TrimSpace": "strings", + "strings.TrimSuffix": "strings", + "subtle.ConstantTimeByteEq": "crypto/subtle", + "subtle.ConstantTimeCompare": "crypto/subtle", + "subtle.ConstantTimeCopy": "crypto/subtle", + "subtle.ConstantTimeEq": "crypto/subtle", + "subtle.ConstantTimeLessOrEq": "crypto/subtle", + "subtle.ConstantTimeSelect": "crypto/subtle", + "suffixarray.Index": "index/suffixarray", + "suffixarray.New": "index/suffixarray", + "sync.Cond": "sync", + "sync.Locker": "sync", + "sync.Mutex": "sync", + "sync.NewCond": "sync", + "sync.Once": "sync", + "sync.Pool": "sync", + "sync.RWMutex": "sync", + "sync.WaitGroup": "sync", + "syntax.ClassNL": "regexp/syntax", + "syntax.Compile": "regexp/syntax", + "syntax.DotNL": "regexp/syntax", + "syntax.EmptyBeginLine": "regexp/syntax", + "syntax.EmptyBeginText": "regexp/syntax", + "syntax.EmptyEndLine": "regexp/syntax", + "syntax.EmptyEndText": "regexp/syntax", + "syntax.EmptyNoWordBoundary": "regexp/syntax", + "syntax.EmptyOp": "regexp/syntax", + "syntax.EmptyOpContext": "regexp/syntax", + "syntax.EmptyWordBoundary": "regexp/syntax", + "syntax.ErrInternalError": "regexp/syntax", + "syntax.ErrInvalidCharClass": "regexp/syntax", + "syntax.ErrInvalidCharRange": "regexp/syntax", + "syntax.ErrInvalidEscape": "regexp/syntax", + "syntax.ErrInvalidNamedCapture": "regexp/syntax", + "syntax.ErrInvalidPerlOp": "regexp/syntax", + "syntax.ErrInvalidRepeatOp": "regexp/syntax", + "syntax.ErrInvalidRepeatSize": "regexp/syntax", + "syntax.ErrInvalidUTF8": "regexp/syntax", + "syntax.ErrMissingBracket": "regexp/syntax", + "syntax.ErrMissingParen": "regexp/syntax", + "syntax.ErrMissingRepeatArgument": "regexp/syntax", + "syntax.ErrTrailingBackslash": "regexp/syntax", + "syntax.ErrUnexpectedParen": "regexp/syntax", + "syntax.Error": "regexp/syntax", + "syntax.ErrorCode": "regexp/syntax", + "syntax.Flags": "regexp/syntax", + "syntax.FoldCase": "regexp/syntax", + "syntax.Inst": "regexp/syntax", + "syntax.InstAlt": "regexp/syntax", + "syntax.InstAltMatch": "regexp/syntax", + "syntax.InstCapture": "regexp/syntax", + "syntax.InstEmptyWidth": "regexp/syntax", + "syntax.InstFail": "regexp/syntax", + "syntax.InstMatch": "regexp/syntax", + "syntax.InstNop": "regexp/syntax", + "syntax.InstOp": "regexp/syntax", + "syntax.InstRune": "regexp/syntax", + "syntax.InstRune1": "regexp/syntax", + "syntax.InstRuneAny": "regexp/syntax", + "syntax.InstRuneAnyNotNL": "regexp/syntax", + "syntax.IsWordChar": "regexp/syntax", + "syntax.Literal": "regexp/syntax", + "syntax.MatchNL": "regexp/syntax", + "syntax.NonGreedy": "regexp/syntax", + "syntax.OneLine": "regexp/syntax", + "syntax.Op": "regexp/syntax", + "syntax.OpAlternate": "regexp/syntax", + "syntax.OpAnyChar": "regexp/syntax", + "syntax.OpAnyCharNotNL": "regexp/syntax", + "syntax.OpBeginLine": "regexp/syntax", + "syntax.OpBeginText": "regexp/syntax", + "syntax.OpCapture": "regexp/syntax", + "syntax.OpCharClass": "regexp/syntax", + "syntax.OpConcat": "regexp/syntax", + "syntax.OpEmptyMatch": "regexp/syntax", + "syntax.OpEndLine": "regexp/syntax", + "syntax.OpEndText": "regexp/syntax", + "syntax.OpLiteral": "regexp/syntax", + "syntax.OpNoMatch": "regexp/syntax", + "syntax.OpNoWordBoundary": "regexp/syntax", + "syntax.OpPlus": "regexp/syntax", + "syntax.OpQuest": "regexp/syntax", + "syntax.OpRepeat": "regexp/syntax", + "syntax.OpStar": "regexp/syntax", + "syntax.OpWordBoundary": "regexp/syntax", + "syntax.POSIX": "regexp/syntax", + "syntax.Parse": "regexp/syntax", + "syntax.Perl": "regexp/syntax", + "syntax.PerlX": "regexp/syntax", + "syntax.Prog": "regexp/syntax", + "syntax.Regexp": "regexp/syntax", + "syntax.Simple": "regexp/syntax", + "syntax.UnicodeGroups": "regexp/syntax", + "syntax.WasDollar": "regexp/syntax", + "syscall.AF_ALG": "syscall", + "syscall.AF_APPLETALK": "syscall", + "syscall.AF_ARP": "syscall", + "syscall.AF_ASH": "syscall", + "syscall.AF_ATM": "syscall", + "syscall.AF_ATMPVC": "syscall", + "syscall.AF_ATMSVC": "syscall", + "syscall.AF_AX25": "syscall", + "syscall.AF_BLUETOOTH": "syscall", + "syscall.AF_BRIDGE": "syscall", + "syscall.AF_CAIF": "syscall", + "syscall.AF_CAN": "syscall", + "syscall.AF_CCITT": "syscall", + "syscall.AF_CHAOS": "syscall", + "syscall.AF_CNT": "syscall", + "syscall.AF_COIP": "syscall", + "syscall.AF_DATAKIT": "syscall", + "syscall.AF_DECnet": "syscall", + "syscall.AF_DLI": "syscall", + "syscall.AF_E164": "syscall", + "syscall.AF_ECMA": "syscall", + "syscall.AF_ECONET": "syscall", + "syscall.AF_ENCAP": "syscall", + "syscall.AF_FILE": "syscall", + "syscall.AF_HYLINK": "syscall", + "syscall.AF_IEEE80211": "syscall", + "syscall.AF_IEEE802154": "syscall", + "syscall.AF_IMPLINK": "syscall", + "syscall.AF_INET": "syscall", + "syscall.AF_INET6": "syscall", + "syscall.AF_INET6_SDP": "syscall", + "syscall.AF_INET_SDP": "syscall", + "syscall.AF_IPX": "syscall", + "syscall.AF_IRDA": "syscall", + "syscall.AF_ISDN": "syscall", + "syscall.AF_ISO": "syscall", + "syscall.AF_IUCV": "syscall", + "syscall.AF_KEY": "syscall", + "syscall.AF_LAT": "syscall", + "syscall.AF_LINK": "syscall", + "syscall.AF_LLC": "syscall", + "syscall.AF_LOCAL": "syscall", + "syscall.AF_MAX": "syscall", + "syscall.AF_MPLS": "syscall", + "syscall.AF_NATM": "syscall", + "syscall.AF_NDRV": "syscall", + "syscall.AF_NETBEUI": "syscall", + "syscall.AF_NETBIOS": "syscall", + "syscall.AF_NETGRAPH": "syscall", + "syscall.AF_NETLINK": "syscall", + "syscall.AF_NETROM": "syscall", + "syscall.AF_NS": "syscall", + "syscall.AF_OROUTE": "syscall", + "syscall.AF_OSI": "syscall", + "syscall.AF_PACKET": "syscall", + "syscall.AF_PHONET": "syscall", + "syscall.AF_PPP": "syscall", + "syscall.AF_PPPOX": "syscall", + "syscall.AF_PUP": "syscall", + "syscall.AF_RDS": "syscall", + "syscall.AF_RESERVED_36": "syscall", + "syscall.AF_ROSE": "syscall", + "syscall.AF_ROUTE": "syscall", + "syscall.AF_RXRPC": "syscall", + "syscall.AF_SCLUSTER": "syscall", + "syscall.AF_SECURITY": "syscall", + "syscall.AF_SIP": "syscall", + "syscall.AF_SLOW": "syscall", + "syscall.AF_SNA": "syscall", + "syscall.AF_SYSTEM": "syscall", + "syscall.AF_TIPC": "syscall", + "syscall.AF_UNIX": "syscall", + "syscall.AF_UNSPEC": "syscall", + "syscall.AF_VENDOR00": "syscall", + "syscall.AF_VENDOR01": "syscall", + "syscall.AF_VENDOR02": "syscall", + "syscall.AF_VENDOR03": "syscall", + "syscall.AF_VENDOR04": "syscall", + "syscall.AF_VENDOR05": "syscall", + "syscall.AF_VENDOR06": "syscall", + "syscall.AF_VENDOR07": "syscall", + "syscall.AF_VENDOR08": "syscall", + "syscall.AF_VENDOR09": "syscall", + "syscall.AF_VENDOR10": "syscall", + "syscall.AF_VENDOR11": "syscall", + "syscall.AF_VENDOR12": "syscall", + "syscall.AF_VENDOR13": "syscall", + "syscall.AF_VENDOR14": "syscall", + "syscall.AF_VENDOR15": "syscall", + "syscall.AF_VENDOR16": "syscall", + "syscall.AF_VENDOR17": "syscall", + "syscall.AF_VENDOR18": "syscall", + "syscall.AF_VENDOR19": "syscall", + "syscall.AF_VENDOR20": "syscall", + "syscall.AF_VENDOR21": "syscall", + "syscall.AF_VENDOR22": "syscall", + "syscall.AF_VENDOR23": "syscall", + "syscall.AF_VENDOR24": "syscall", + "syscall.AF_VENDOR25": "syscall", + "syscall.AF_VENDOR26": "syscall", + "syscall.AF_VENDOR27": "syscall", + "syscall.AF_VENDOR28": "syscall", + "syscall.AF_VENDOR29": "syscall", + "syscall.AF_VENDOR30": "syscall", + "syscall.AF_VENDOR31": "syscall", + "syscall.AF_VENDOR32": "syscall", + "syscall.AF_VENDOR33": "syscall", + "syscall.AF_VENDOR34": "syscall", + "syscall.AF_VENDOR35": "syscall", + "syscall.AF_VENDOR36": "syscall", + "syscall.AF_VENDOR37": "syscall", + "syscall.AF_VENDOR38": "syscall", + "syscall.AF_VENDOR39": "syscall", + "syscall.AF_VENDOR40": "syscall", + "syscall.AF_VENDOR41": "syscall", + "syscall.AF_VENDOR42": "syscall", + "syscall.AF_VENDOR43": "syscall", + "syscall.AF_VENDOR44": "syscall", + "syscall.AF_VENDOR45": "syscall", + "syscall.AF_VENDOR46": "syscall", + "syscall.AF_VENDOR47": "syscall", + "syscall.AF_WANPIPE": "syscall", + "syscall.AF_X25": "syscall", + "syscall.AI_CANONNAME": "syscall", + "syscall.AI_NUMERICHOST": "syscall", + "syscall.AI_PASSIVE": "syscall", + "syscall.APPLICATION_ERROR": 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"syscall.ARPHRD_SKIP": "syscall", + "syscall.ARPHRD_SLIP": "syscall", + "syscall.ARPHRD_SLIP6": "syscall", + "syscall.ARPHRD_STRIP": "syscall", + "syscall.ARPHRD_TUNNEL": "syscall", + "syscall.ARPHRD_TUNNEL6": "syscall", + "syscall.ARPHRD_VOID": "syscall", + "syscall.ARPHRD_X25": "syscall", + "syscall.AUTHTYPE_CLIENT": "syscall", + "syscall.AUTHTYPE_SERVER": "syscall", + "syscall.Accept": "syscall", + "syscall.Accept4": "syscall", + "syscall.AcceptEx": "syscall", + "syscall.Access": "syscall", + "syscall.Acct": "syscall", + "syscall.AddrinfoW": "syscall", + "syscall.Adjtime": "syscall", + "syscall.Adjtimex": "syscall", + "syscall.AttachLsf": "syscall", + "syscall.B0": "syscall", + "syscall.B1000000": "syscall", + "syscall.B110": "syscall", + "syscall.B115200": "syscall", + "syscall.B1152000": "syscall", + "syscall.B1200": "syscall", + "syscall.B134": "syscall", + "syscall.B14400": "syscall", + "syscall.B150": "syscall", + "syscall.B1500000": "syscall", + "syscall.B1800": "syscall", + 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"syscall.BPF_JGE": "syscall", + "syscall.BPF_JGT": "syscall", + "syscall.BPF_JMP": "syscall", + "syscall.BPF_JSET": "syscall", + "syscall.BPF_K": "syscall", + "syscall.BPF_LD": "syscall", + "syscall.BPF_LDX": "syscall", + "syscall.BPF_LEN": "syscall", + "syscall.BPF_LSH": "syscall", + "syscall.BPF_MAJOR_VERSION": "syscall", + "syscall.BPF_MAXBUFSIZE": "syscall", + "syscall.BPF_MAXINSNS": "syscall", + "syscall.BPF_MEM": "syscall", + "syscall.BPF_MEMWORDS": "syscall", + "syscall.BPF_MINBUFSIZE": "syscall", + "syscall.BPF_MINOR_VERSION": "syscall", + "syscall.BPF_MISC": "syscall", + "syscall.BPF_MSH": "syscall", + "syscall.BPF_MUL": "syscall", + "syscall.BPF_NEG": "syscall", + "syscall.BPF_OR": "syscall", + "syscall.BPF_RELEASE": "syscall", + "syscall.BPF_RET": "syscall", + "syscall.BPF_RSH": "syscall", + "syscall.BPF_ST": "syscall", + "syscall.BPF_STX": "syscall", + "syscall.BPF_SUB": "syscall", + "syscall.BPF_TAX": "syscall", + "syscall.BPF_TXA": "syscall", + "syscall.BPF_T_BINTIME": "syscall", + "syscall.BPF_T_BINTIME_FAST": "syscall", + "syscall.BPF_T_BINTIME_MONOTONIC": "syscall", + "syscall.BPF_T_BINTIME_MONOTONIC_FAST": "syscall", + "syscall.BPF_T_FAST": "syscall", + "syscall.BPF_T_FLAG_MASK": "syscall", + "syscall.BPF_T_FORMAT_MASK": "syscall", + "syscall.BPF_T_MICROTIME": "syscall", + "syscall.BPF_T_MICROTIME_FAST": "syscall", + "syscall.BPF_T_MICROTIME_MONOTONIC": "syscall", + "syscall.BPF_T_MICROTIME_MONOTONIC_FAST": "syscall", + "syscall.BPF_T_MONOTONIC": "syscall", + "syscall.BPF_T_MONOTONIC_FAST": "syscall", + "syscall.BPF_T_NANOTIME": "syscall", + "syscall.BPF_T_NANOTIME_FAST": "syscall", + "syscall.BPF_T_NANOTIME_MONOTONIC": "syscall", + "syscall.BPF_T_NANOTIME_MONOTONIC_FAST": "syscall", + "syscall.BPF_T_NONE": "syscall", + "syscall.BPF_T_NORMAL": "syscall", + "syscall.BPF_W": "syscall", + "syscall.BPF_X": "syscall", + "syscall.BRKINT": "syscall", + "syscall.Bind": "syscall", + "syscall.BindToDevice": "syscall", + "syscall.BpfBuflen": "syscall", + "syscall.BpfDatalink": "syscall", + "syscall.BpfHdr": "syscall", + "syscall.BpfHeadercmpl": "syscall", + "syscall.BpfInsn": "syscall", + "syscall.BpfInterface": "syscall", + "syscall.BpfJump": "syscall", + "syscall.BpfProgram": "syscall", + "syscall.BpfStat": "syscall", + "syscall.BpfStats": "syscall", + "syscall.BpfStmt": "syscall", + "syscall.BpfTimeout": "syscall", + "syscall.BpfTimeval": "syscall", + "syscall.BpfVersion": "syscall", + "syscall.BpfZbuf": "syscall", + "syscall.BpfZbufHeader": "syscall", + "syscall.ByHandleFileInformation": "syscall", + "syscall.BytePtrFromString": "syscall", + "syscall.ByteSliceFromString": "syscall", + "syscall.CCR0_FLUSH": "syscall", + "syscall.CERT_CHAIN_POLICY_AUTHENTICODE": "syscall", + "syscall.CERT_CHAIN_POLICY_AUTHENTICODE_TS": "syscall", + "syscall.CERT_CHAIN_POLICY_BASE": "syscall", + "syscall.CERT_CHAIN_POLICY_BASIC_CONSTRAINTS": "syscall", + "syscall.CERT_CHAIN_POLICY_EV": "syscall", + "syscall.CERT_CHAIN_POLICY_MICROSOFT_ROOT": "syscall", + "syscall.CERT_CHAIN_POLICY_NT_AUTH": "syscall", + "syscall.CERT_CHAIN_POLICY_SSL": "syscall", + "syscall.CERT_E_CN_NO_MATCH": "syscall", + "syscall.CERT_E_EXPIRED": "syscall", + "syscall.CERT_E_PURPOSE": "syscall", + "syscall.CERT_E_ROLE": "syscall", + "syscall.CERT_E_UNTRUSTEDROOT": "syscall", + "syscall.CERT_STORE_ADD_ALWAYS": "syscall", + "syscall.CERT_STORE_DEFER_CLOSE_UNTIL_LAST_FREE_FLAG": "syscall", + "syscall.CERT_STORE_PROV_MEMORY": "syscall", + "syscall.CERT_TRUST_HAS_EXCLUDED_NAME_CONSTRAINT": "syscall", + "syscall.CERT_TRUST_HAS_NOT_DEFINED_NAME_CONSTRAINT": "syscall", + "syscall.CERT_TRUST_HAS_NOT_PERMITTED_NAME_CONSTRAINT": "syscall", + "syscall.CERT_TRUST_HAS_NOT_SUPPORTED_CRITICAL_EXT": "syscall", + "syscall.CERT_TRUST_HAS_NOT_SUPPORTED_NAME_CONSTRAINT": "syscall", + "syscall.CERT_TRUST_INVALID_BASIC_CONSTRAINTS": "syscall", + "syscall.CERT_TRUST_INVALID_EXTENSION": "syscall", + "syscall.CERT_TRUST_INVALID_NAME_CONSTRAINTS": "syscall", + "syscall.CERT_TRUST_INVALID_POLICY_CONSTRAINTS": "syscall", + "syscall.CERT_TRUST_IS_CYCLIC": "syscall", + "syscall.CERT_TRUST_IS_EXPLICIT_DISTRUST": "syscall", + "syscall.CERT_TRUST_IS_NOT_SIGNATURE_VALID": "syscall", + "syscall.CERT_TRUST_IS_NOT_TIME_VALID": "syscall", + "syscall.CERT_TRUST_IS_NOT_VALID_FOR_USAGE": "syscall", + "syscall.CERT_TRUST_IS_OFFLINE_REVOCATION": "syscall", + "syscall.CERT_TRUST_IS_REVOKED": "syscall", + "syscall.CERT_TRUST_IS_UNTRUSTED_ROOT": "syscall", + "syscall.CERT_TRUST_NO_ERROR": "syscall", + "syscall.CERT_TRUST_NO_ISSUANCE_CHAIN_POLICY": "syscall", + "syscall.CERT_TRUST_REVOCATION_STATUS_UNKNOWN": "syscall", + "syscall.CFLUSH": "syscall", + "syscall.CLOCAL": "syscall", + "syscall.CLONE_CHILD_CLEARTID": "syscall", + "syscall.CLONE_CHILD_SETTID": "syscall", + "syscall.CLONE_CSIGNAL": "syscall", + "syscall.CLONE_DETACHED": "syscall", + "syscall.CLONE_FILES": "syscall", + "syscall.CLONE_FS": "syscall", + "syscall.CLONE_IO": "syscall", + "syscall.CLONE_NEWIPC": "syscall", + "syscall.CLONE_NEWNET": "syscall", + "syscall.CLONE_NEWNS": "syscall", + "syscall.CLONE_NEWPID": "syscall", + "syscall.CLONE_NEWUSER": "syscall", + "syscall.CLONE_NEWUTS": "syscall", + "syscall.CLONE_PARENT": "syscall", + "syscall.CLONE_PARENT_SETTID": "syscall", + "syscall.CLONE_PID": "syscall", + "syscall.CLONE_PTRACE": "syscall", + "syscall.CLONE_SETTLS": "syscall", + "syscall.CLONE_SIGHAND": "syscall", + "syscall.CLONE_SYSVSEM": "syscall", + "syscall.CLONE_THREAD": "syscall", + "syscall.CLONE_UNTRACED": "syscall", + "syscall.CLONE_VFORK": "syscall", + "syscall.CLONE_VM": "syscall", + "syscall.CPUID_CFLUSH": "syscall", + "syscall.CREAD": "syscall", + "syscall.CREATE_ALWAYS": "syscall", + "syscall.CREATE_NEW": "syscall", + "syscall.CREATE_NEW_PROCESS_GROUP": "syscall", + "syscall.CREATE_UNICODE_ENVIRONMENT": "syscall", + "syscall.CRYPT_DEFAULT_CONTAINER_OPTIONAL": "syscall", + "syscall.CRYPT_DELETEKEYSET": "syscall", + "syscall.CRYPT_MACHINE_KEYSET": "syscall", + "syscall.CRYPT_NEWKEYSET": "syscall", + "syscall.CRYPT_SILENT": "syscall", + "syscall.CRYPT_VERIFYCONTEXT": "syscall", + "syscall.CS5": "syscall", + "syscall.CS6": "syscall", + "syscall.CS7": "syscall", + "syscall.CS8": "syscall", + "syscall.CSIZE": "syscall", + "syscall.CSTART": "syscall", + "syscall.CSTATUS": "syscall", + "syscall.CSTOP": "syscall", + "syscall.CSTOPB": "syscall", + "syscall.CSUSP": "syscall", + "syscall.CTL_MAXNAME": "syscall", + "syscall.CTL_NET": "syscall", + "syscall.CTL_QUERY": "syscall", + "syscall.CTRL_BREAK_EVENT": "syscall", + "syscall.CTRL_C_EVENT": "syscall", + "syscall.CancelIo": "syscall", + "syscall.CancelIoEx": "syscall", + "syscall.CertAddCertificateContextToStore": "syscall", + "syscall.CertChainContext": "syscall", + "syscall.CertChainElement": "syscall", + "syscall.CertChainPara": "syscall", + "syscall.CertChainPolicyPara": "syscall", + "syscall.CertChainPolicyStatus": "syscall", + "syscall.CertCloseStore": "syscall", + "syscall.CertContext": "syscall", + "syscall.CertCreateCertificateContext": "syscall", + "syscall.CertEnhKeyUsage": "syscall", + "syscall.CertEnumCertificatesInStore": "syscall", + "syscall.CertFreeCertificateChain": "syscall", + "syscall.CertFreeCertificateContext": "syscall", + "syscall.CertGetCertificateChain": "syscall", + "syscall.CertOpenStore": "syscall", + "syscall.CertOpenSystemStore": "syscall", + "syscall.CertRevocationInfo": "syscall", + "syscall.CertSimpleChain": "syscall", + "syscall.CertTrustStatus": "syscall", + "syscall.CertUsageMatch": "syscall", + "syscall.CertVerifyCertificateChainPolicy": "syscall", + "syscall.Chdir": "syscall", + "syscall.CheckBpfVersion": "syscall", + "syscall.Chflags": "syscall", + "syscall.Chmod": "syscall", + "syscall.Chown": "syscall", + "syscall.Chroot": "syscall", + "syscall.Clearenv": "syscall", + "syscall.Close": "syscall", + "syscall.CloseHandle": "syscall", + "syscall.CloseOnExec": "syscall", + "syscall.Closesocket": "syscall", + "syscall.CmsgLen": "syscall", + "syscall.CmsgSpace": "syscall", + "syscall.Cmsghdr": "syscall", + "syscall.CommandLineToArgv": "syscall", + "syscall.ComputerName": "syscall", + "syscall.Connect": "syscall", + "syscall.ConnectEx": "syscall", + "syscall.ConvertSidToStringSid": "syscall", + "syscall.ConvertStringSidToSid": "syscall", + "syscall.CopySid": "syscall", + "syscall.Creat": "syscall", + "syscall.CreateDirectory": "syscall", + "syscall.CreateFile": "syscall", + "syscall.CreateFileMapping": "syscall", + "syscall.CreateIoCompletionPort": "syscall", + "syscall.CreatePipe": "syscall", + "syscall.CreateProcess": "syscall", + "syscall.Credential": "syscall", + "syscall.CryptAcquireContext": "syscall", + "syscall.CryptGenRandom": "syscall", + "syscall.CryptReleaseContext": "syscall", + "syscall.DIOCBSFLUSH": "syscall", + "syscall.DIOCOSFPFLUSH": "syscall", + "syscall.DLL": "syscall", + "syscall.DLLError": "syscall", + "syscall.DLT_A429": "syscall", + "syscall.DLT_A653_ICM": "syscall", + "syscall.DLT_AIRONET_HEADER": "syscall", + "syscall.DLT_AOS": "syscall", + "syscall.DLT_APPLE_IP_OVER_IEEE1394": "syscall", + "syscall.DLT_ARCNET": "syscall", + "syscall.DLT_ARCNET_LINUX": "syscall", + "syscall.DLT_ATM_CLIP": "syscall", + "syscall.DLT_ATM_RFC1483": "syscall", + "syscall.DLT_AURORA": "syscall", + "syscall.DLT_AX25": "syscall", + "syscall.DLT_AX25_KISS": "syscall", + "syscall.DLT_BACNET_MS_TP": "syscall", + "syscall.DLT_BLUETOOTH_HCI_H4": "syscall", + "syscall.DLT_BLUETOOTH_HCI_H4_WITH_PHDR": "syscall", + "syscall.DLT_CAN20B": "syscall", + "syscall.DLT_CAN_SOCKETCAN": "syscall", + "syscall.DLT_CHAOS": "syscall", + "syscall.DLT_CHDLC": "syscall", + "syscall.DLT_CISCO_IOS": "syscall", + "syscall.DLT_C_HDLC": "syscall", + "syscall.DLT_C_HDLC_WITH_DIR": "syscall", + "syscall.DLT_DBUS": "syscall", + "syscall.DLT_DECT": "syscall", + "syscall.DLT_DOCSIS": "syscall", + "syscall.DLT_DVB_CI": "syscall", + "syscall.DLT_ECONET": "syscall", + "syscall.DLT_EN10MB": "syscall", + "syscall.DLT_EN3MB": "syscall", + "syscall.DLT_ENC": "syscall", + "syscall.DLT_ERF": "syscall", + "syscall.DLT_ERF_ETH": "syscall", + "syscall.DLT_ERF_POS": "syscall", + "syscall.DLT_FC_2": "syscall", + "syscall.DLT_FC_2_WITH_FRAME_DELIMS": "syscall", + "syscall.DLT_FDDI": "syscall", + "syscall.DLT_FLEXRAY": "syscall", + "syscall.DLT_FRELAY": "syscall", + "syscall.DLT_FRELAY_WITH_DIR": "syscall", + "syscall.DLT_GCOM_SERIAL": "syscall", + "syscall.DLT_GCOM_T1E1": "syscall", + "syscall.DLT_GPF_F": "syscall", + "syscall.DLT_GPF_T": "syscall", + "syscall.DLT_GPRS_LLC": "syscall", + "syscall.DLT_GSMTAP_ABIS": "syscall", + "syscall.DLT_GSMTAP_UM": "syscall", + "syscall.DLT_HDLC": "syscall", + "syscall.DLT_HHDLC": "syscall", + "syscall.DLT_HIPPI": "syscall", + "syscall.DLT_IBM_SN": "syscall", + "syscall.DLT_IBM_SP": "syscall", + "syscall.DLT_IEEE802": "syscall", + "syscall.DLT_IEEE802_11": "syscall", + "syscall.DLT_IEEE802_11_RADIO": "syscall", + "syscall.DLT_IEEE802_11_RADIO_AVS": "syscall", + "syscall.DLT_IEEE802_15_4": "syscall", + "syscall.DLT_IEEE802_15_4_LINUX": "syscall", + "syscall.DLT_IEEE802_15_4_NOFCS": "syscall", + "syscall.DLT_IEEE802_15_4_NONASK_PHY": "syscall", + "syscall.DLT_IEEE802_16_MAC_CPS": "syscall", + "syscall.DLT_IEEE802_16_MAC_CPS_RADIO": "syscall", + "syscall.DLT_IPFILTER": "syscall", + "syscall.DLT_IPMB": "syscall", + "syscall.DLT_IPMB_LINUX": "syscall", + "syscall.DLT_IPNET": "syscall", + "syscall.DLT_IPOIB": "syscall", + "syscall.DLT_IPV4": "syscall", + "syscall.DLT_IPV6": "syscall", + "syscall.DLT_IP_OVER_FC": "syscall", + "syscall.DLT_JUNIPER_ATM1": "syscall", + "syscall.DLT_JUNIPER_ATM2": "syscall", + "syscall.DLT_JUNIPER_ATM_CEMIC": "syscall", + "syscall.DLT_JUNIPER_CHDLC": "syscall", + "syscall.DLT_JUNIPER_ES": "syscall", + "syscall.DLT_JUNIPER_ETHER": "syscall", + "syscall.DLT_JUNIPER_FIBRECHANNEL": "syscall", + "syscall.DLT_JUNIPER_FRELAY": "syscall", + "syscall.DLT_JUNIPER_GGSN": "syscall", + "syscall.DLT_JUNIPER_ISM": "syscall", + "syscall.DLT_JUNIPER_MFR": "syscall", + "syscall.DLT_JUNIPER_MLFR": "syscall", + "syscall.DLT_JUNIPER_MLPPP": "syscall", + "syscall.DLT_JUNIPER_MONITOR": "syscall", + "syscall.DLT_JUNIPER_PIC_PEER": "syscall", + "syscall.DLT_JUNIPER_PPP": "syscall", + "syscall.DLT_JUNIPER_PPPOE": "syscall", + "syscall.DLT_JUNIPER_PPPOE_ATM": "syscall", + "syscall.DLT_JUNIPER_SERVICES": "syscall", + "syscall.DLT_JUNIPER_SRX_E2E": "syscall", + "syscall.DLT_JUNIPER_ST": "syscall", + "syscall.DLT_JUNIPER_VP": "syscall", + "syscall.DLT_JUNIPER_VS": "syscall", + "syscall.DLT_LAPB_WITH_DIR": "syscall", + "syscall.DLT_LAPD": "syscall", + "syscall.DLT_LIN": "syscall", + "syscall.DLT_LINUX_EVDEV": "syscall", + "syscall.DLT_LINUX_IRDA": "syscall", + "syscall.DLT_LINUX_LAPD": "syscall", + "syscall.DLT_LINUX_PPP_WITHDIRECTION": "syscall", + "syscall.DLT_LINUX_SLL": "syscall", + "syscall.DLT_LOOP": "syscall", + "syscall.DLT_LTALK": "syscall", + "syscall.DLT_MATCHING_MAX": "syscall", + "syscall.DLT_MATCHING_MIN": "syscall", + "syscall.DLT_MFR": "syscall", + "syscall.DLT_MOST": "syscall", + "syscall.DLT_MPEG_2_TS": "syscall", + "syscall.DLT_MPLS": "syscall", + "syscall.DLT_MTP2": "syscall", + "syscall.DLT_MTP2_WITH_PHDR": "syscall", + "syscall.DLT_MTP3": "syscall", + "syscall.DLT_MUX27010": "syscall", + "syscall.DLT_NETANALYZER": "syscall", + "syscall.DLT_NETANALYZER_TRANSPARENT": "syscall", + "syscall.DLT_NFC_LLCP": "syscall", + "syscall.DLT_NFLOG": "syscall", + "syscall.DLT_NG40": "syscall", + "syscall.DLT_NULL": "syscall", + "syscall.DLT_PCI_EXP": "syscall", + "syscall.DLT_PFLOG": "syscall", + "syscall.DLT_PFSYNC": "syscall", + "syscall.DLT_PPI": "syscall", + "syscall.DLT_PPP": "syscall", + "syscall.DLT_PPP_BSDOS": "syscall", + "syscall.DLT_PPP_ETHER": "syscall", + "syscall.DLT_PPP_PPPD": "syscall", + "syscall.DLT_PPP_SERIAL": "syscall", + "syscall.DLT_PPP_WITH_DIR": "syscall", + "syscall.DLT_PPP_WITH_DIRECTION": "syscall", + "syscall.DLT_PRISM_HEADER": "syscall", + "syscall.DLT_PRONET": "syscall", + "syscall.DLT_RAIF1": "syscall", + "syscall.DLT_RAW": "syscall", + "syscall.DLT_RAWAF_MASK": "syscall", + "syscall.DLT_RIO": "syscall", + "syscall.DLT_SCCP": "syscall", + "syscall.DLT_SITA": "syscall", + "syscall.DLT_SLIP": "syscall", + "syscall.DLT_SLIP_BSDOS": "syscall", + "syscall.DLT_STANAG_5066_D_PDU": "syscall", + "syscall.DLT_SUNATM": "syscall", + "syscall.DLT_SYMANTEC_FIREWALL": "syscall", + "syscall.DLT_TZSP": "syscall", + "syscall.DLT_USB": "syscall", + "syscall.DLT_USB_LINUX": "syscall", + "syscall.DLT_USB_LINUX_MMAPPED": "syscall", + "syscall.DLT_USER0": "syscall", + "syscall.DLT_USER1": "syscall", + "syscall.DLT_USER10": "syscall", + "syscall.DLT_USER11": "syscall", + "syscall.DLT_USER12": "syscall", + "syscall.DLT_USER13": "syscall", + "syscall.DLT_USER14": "syscall", + "syscall.DLT_USER15": "syscall", + "syscall.DLT_USER2": "syscall", + "syscall.DLT_USER3": "syscall", + "syscall.DLT_USER4": "syscall", + "syscall.DLT_USER5": "syscall", + "syscall.DLT_USER6": "syscall", + "syscall.DLT_USER7": "syscall", + "syscall.DLT_USER8": "syscall", + "syscall.DLT_USER9": "syscall", + "syscall.DLT_WIHART": "syscall", + "syscall.DLT_X2E_SERIAL": "syscall", + "syscall.DLT_X2E_XORAYA": "syscall", + "syscall.DNSMXData": "syscall", + "syscall.DNSPTRData": "syscall", + "syscall.DNSRecord": "syscall", + "syscall.DNSSRVData": "syscall", + "syscall.DNSTXTData": "syscall", + "syscall.DNS_TYPE_A": "syscall", + "syscall.DNS_TYPE_A6": "syscall", + "syscall.DNS_TYPE_AAAA": "syscall", + "syscall.DNS_TYPE_ADDRS": "syscall", + "syscall.DNS_TYPE_AFSDB": "syscall", + "syscall.DNS_TYPE_ALL": "syscall", + "syscall.DNS_TYPE_ANY": "syscall", + "syscall.DNS_TYPE_ATMA": "syscall", + "syscall.DNS_TYPE_AXFR": "syscall", + "syscall.DNS_TYPE_CERT": "syscall", + "syscall.DNS_TYPE_CNAME": "syscall", + "syscall.DNS_TYPE_DHCID": "syscall", + "syscall.DNS_TYPE_DNAME": "syscall", + "syscall.DNS_TYPE_DNSKEY": "syscall", + "syscall.DNS_TYPE_DS": "syscall", + "syscall.DNS_TYPE_EID": "syscall", + "syscall.DNS_TYPE_GID": "syscall", + "syscall.DNS_TYPE_GPOS": "syscall", + "syscall.DNS_TYPE_HINFO": "syscall", + "syscall.DNS_TYPE_ISDN": "syscall", + "syscall.DNS_TYPE_IXFR": "syscall", + "syscall.DNS_TYPE_KEY": "syscall", + "syscall.DNS_TYPE_KX": "syscall", + "syscall.DNS_TYPE_LOC": "syscall", + "syscall.DNS_TYPE_MAILA": "syscall", + "syscall.DNS_TYPE_MAILB": "syscall", + "syscall.DNS_TYPE_MB": "syscall", + "syscall.DNS_TYPE_MD": "syscall", + "syscall.DNS_TYPE_MF": "syscall", + "syscall.DNS_TYPE_MG": "syscall", + "syscall.DNS_TYPE_MINFO": "syscall", + "syscall.DNS_TYPE_MR": "syscall", + "syscall.DNS_TYPE_MX": "syscall", + "syscall.DNS_TYPE_NAPTR": "syscall", + "syscall.DNS_TYPE_NBSTAT": "syscall", + "syscall.DNS_TYPE_NIMLOC": "syscall", + "syscall.DNS_TYPE_NS": "syscall", + "syscall.DNS_TYPE_NSAP": "syscall", + "syscall.DNS_TYPE_NSAPPTR": "syscall", + "syscall.DNS_TYPE_NSEC": "syscall", + "syscall.DNS_TYPE_NULL": "syscall", + "syscall.DNS_TYPE_NXT": "syscall", + "syscall.DNS_TYPE_OPT": "syscall", + "syscall.DNS_TYPE_PTR": "syscall", + "syscall.DNS_TYPE_PX": "syscall", + "syscall.DNS_TYPE_RP": "syscall", + "syscall.DNS_TYPE_RRSIG": "syscall", + "syscall.DNS_TYPE_RT": "syscall", + "syscall.DNS_TYPE_SIG": "syscall", + "syscall.DNS_TYPE_SINK": "syscall", + "syscall.DNS_TYPE_SOA": "syscall", + "syscall.DNS_TYPE_SRV": "syscall", + "syscall.DNS_TYPE_TEXT": "syscall", + "syscall.DNS_TYPE_TKEY": "syscall", + "syscall.DNS_TYPE_TSIG": "syscall", + "syscall.DNS_TYPE_UID": "syscall", + "syscall.DNS_TYPE_UINFO": "syscall", + "syscall.DNS_TYPE_UNSPEC": "syscall", + "syscall.DNS_TYPE_WINS": "syscall", + "syscall.DNS_TYPE_WINSR": "syscall", + "syscall.DNS_TYPE_WKS": "syscall", + "syscall.DNS_TYPE_X25": "syscall", + "syscall.DT_BLK": "syscall", + "syscall.DT_CHR": "syscall", + "syscall.DT_DIR": "syscall", + "syscall.DT_FIFO": "syscall", + "syscall.DT_LNK": "syscall", + "syscall.DT_REG": "syscall", + "syscall.DT_SOCK": "syscall", + "syscall.DT_UNKNOWN": "syscall", + "syscall.DT_WHT": "syscall", + "syscall.DUPLICATE_CLOSE_SOURCE": "syscall", + "syscall.DUPLICATE_SAME_ACCESS": "syscall", + "syscall.DeleteFile": "syscall", + "syscall.DetachLsf": "syscall", + "syscall.Dirent": "syscall", + "syscall.DnsQuery": "syscall", + "syscall.DnsRecordListFree": "syscall", + "syscall.Dup": "syscall", + "syscall.Dup2": "syscall", + "syscall.Dup3": "syscall", + "syscall.DuplicateHandle": "syscall", + "syscall.E2BIG": "syscall", + "syscall.EACCES": "syscall", + "syscall.EADDRINUSE": "syscall", + "syscall.EADDRNOTAVAIL": "syscall", + "syscall.EADV": "syscall", + "syscall.EAFNOSUPPORT": "syscall", + "syscall.EAGAIN": "syscall", + "syscall.EALREADY": "syscall", + "syscall.EAUTH": "syscall", + "syscall.EBADARCH": "syscall", + "syscall.EBADE": "syscall", + "syscall.EBADEXEC": "syscall", + "syscall.EBADF": "syscall", + "syscall.EBADFD": "syscall", + "syscall.EBADMACHO": "syscall", + 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"syscall.EFAULT": "syscall", + "syscall.EFBIG": "syscall", + "syscall.EFER_LMA": "syscall", + "syscall.EFER_LME": "syscall", + "syscall.EFER_NXE": "syscall", + "syscall.EFER_SCE": "syscall", + "syscall.EFTYPE": "syscall", + "syscall.EHOSTDOWN": "syscall", + "syscall.EHOSTUNREACH": "syscall", + "syscall.EHWPOISON": "syscall", + "syscall.EIDRM": "syscall", + "syscall.EILSEQ": "syscall", + "syscall.EINPROGRESS": "syscall", + "syscall.EINTR": "syscall", + "syscall.EINVAL": "syscall", + "syscall.EIO": "syscall", + "syscall.EIPSEC": "syscall", + "syscall.EISCONN": "syscall", + "syscall.EISDIR": "syscall", + "syscall.EISNAM": "syscall", + "syscall.EKEYEXPIRED": "syscall", + "syscall.EKEYREJECTED": "syscall", + "syscall.EKEYREVOKED": "syscall", + "syscall.EL2HLT": "syscall", + "syscall.EL2NSYNC": "syscall", + "syscall.EL3HLT": "syscall", + "syscall.EL3RST": "syscall", + "syscall.ELAST": "syscall", + "syscall.ELF_NGREG": "syscall", + "syscall.ELF_PRARGSZ": "syscall", + "syscall.ELIBACC": 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"syscall.EN_SW_CTL_PREC": "syscall", + "syscall.EN_SW_CTL_ROUND": "syscall", + "syscall.EN_SW_DATACHAIN": "syscall", + "syscall.EN_SW_DENORM": "syscall", + "syscall.EN_SW_INVOP": "syscall", + "syscall.EN_SW_OVERFLOW": "syscall", + "syscall.EN_SW_PRECLOSS": "syscall", + "syscall.EN_SW_UNDERFLOW": "syscall", + "syscall.EN_SW_ZERODIV": "syscall", + "syscall.EOPNOTSUPP": "syscall", + "syscall.EOVERFLOW": "syscall", + "syscall.EOWNERDEAD": "syscall", + "syscall.EPERM": "syscall", + "syscall.EPFNOSUPPORT": "syscall", + "syscall.EPIPE": "syscall", + "syscall.EPOLLERR": "syscall", + "syscall.EPOLLET": "syscall", + "syscall.EPOLLHUP": "syscall", + "syscall.EPOLLIN": "syscall", + "syscall.EPOLLMSG": "syscall", + "syscall.EPOLLONESHOT": "syscall", + "syscall.EPOLLOUT": "syscall", + "syscall.EPOLLPRI": "syscall", + "syscall.EPOLLRDBAND": "syscall", + "syscall.EPOLLRDHUP": "syscall", + "syscall.EPOLLRDNORM": "syscall", + "syscall.EPOLLWRBAND": "syscall", + "syscall.EPOLLWRNORM": "syscall", + "syscall.EPOLL_CLOEXEC": "syscall", + "syscall.EPOLL_CTL_ADD": "syscall", + "syscall.EPOLL_CTL_DEL": "syscall", + "syscall.EPOLL_CTL_MOD": "syscall", + "syscall.EPOLL_NONBLOCK": "syscall", + "syscall.EPROCLIM": "syscall", + "syscall.EPROCUNAVAIL": "syscall", + "syscall.EPROGMISMATCH": "syscall", + "syscall.EPROGUNAVAIL": "syscall", + "syscall.EPROTO": "syscall", + "syscall.EPROTONOSUPPORT": "syscall", + "syscall.EPROTOTYPE": "syscall", + "syscall.EPWROFF": "syscall", + "syscall.ERANGE": "syscall", + "syscall.EREMCHG": "syscall", + "syscall.EREMOTE": "syscall", + "syscall.EREMOTEIO": "syscall", + "syscall.ERESTART": "syscall", + "syscall.ERFKILL": "syscall", + "syscall.EROFS": "syscall", + "syscall.ERPCMISMATCH": "syscall", + "syscall.ERROR_ACCESS_DENIED": "syscall", + "syscall.ERROR_ALREADY_EXISTS": "syscall", + "syscall.ERROR_BROKEN_PIPE": "syscall", + "syscall.ERROR_BUFFER_OVERFLOW": "syscall", + "syscall.ERROR_ENVVAR_NOT_FOUND": "syscall", + "syscall.ERROR_FILE_EXISTS": "syscall", + "syscall.ERROR_FILE_NOT_FOUND": "syscall", + "syscall.ERROR_HANDLE_EOF": "syscall", + "syscall.ERROR_INSUFFICIENT_BUFFER": "syscall", + "syscall.ERROR_IO_PENDING": "syscall", + "syscall.ERROR_MOD_NOT_FOUND": "syscall", + "syscall.ERROR_MORE_DATA": "syscall", + "syscall.ERROR_NETNAME_DELETED": "syscall", + "syscall.ERROR_NOT_FOUND": "syscall", + "syscall.ERROR_NO_MORE_FILES": "syscall", + "syscall.ERROR_OPERATION_ABORTED": "syscall", + "syscall.ERROR_PATH_NOT_FOUND": "syscall", + "syscall.ERROR_PROC_NOT_FOUND": "syscall", + "syscall.ESHLIBVERS": "syscall", + "syscall.ESHUTDOWN": "syscall", + "syscall.ESOCKTNOSUPPORT": "syscall", + "syscall.ESPIPE": "syscall", + "syscall.ESRCH": "syscall", + "syscall.ESRMNT": "syscall", + "syscall.ESTALE": "syscall", + "syscall.ESTRPIPE": "syscall", + "syscall.ETHERCAP_JUMBO_MTU": "syscall", + "syscall.ETHERCAP_VLAN_HWTAGGING": "syscall", + "syscall.ETHERCAP_VLAN_MTU": "syscall", + "syscall.ETHERMIN": "syscall", + "syscall.ETHERMTU": "syscall", + "syscall.ETHERMTU_JUMBO": "syscall", + "syscall.ETHERTYPE_8023": "syscall", + "syscall.ETHERTYPE_AARP": "syscall", + "syscall.ETHERTYPE_ACCTON": "syscall", + "syscall.ETHERTYPE_AEONIC": "syscall", + "syscall.ETHERTYPE_ALPHA": "syscall", + "syscall.ETHERTYPE_AMBER": "syscall", + "syscall.ETHERTYPE_AMOEBA": "syscall", + "syscall.ETHERTYPE_AOE": "syscall", + "syscall.ETHERTYPE_APOLLO": "syscall", + "syscall.ETHERTYPE_APOLLODOMAIN": "syscall", + "syscall.ETHERTYPE_APPLETALK": "syscall", + "syscall.ETHERTYPE_APPLITEK": "syscall", + "syscall.ETHERTYPE_ARGONAUT": "syscall", + "syscall.ETHERTYPE_ARP": "syscall", + "syscall.ETHERTYPE_AT": "syscall", + "syscall.ETHERTYPE_ATALK": "syscall", + "syscall.ETHERTYPE_ATOMIC": "syscall", + "syscall.ETHERTYPE_ATT": "syscall", + "syscall.ETHERTYPE_ATTSTANFORD": "syscall", + "syscall.ETHERTYPE_AUTOPHON": "syscall", + "syscall.ETHERTYPE_AXIS": "syscall", + "syscall.ETHERTYPE_BCLOOP": "syscall", + "syscall.ETHERTYPE_BOFL": "syscall", + "syscall.ETHERTYPE_CABLETRON": "syscall", + "syscall.ETHERTYPE_CHAOS": "syscall", + "syscall.ETHERTYPE_COMDESIGN": "syscall", + "syscall.ETHERTYPE_COMPUGRAPHIC": "syscall", + "syscall.ETHERTYPE_COUNTERPOINT": "syscall", + "syscall.ETHERTYPE_CRONUS": "syscall", + "syscall.ETHERTYPE_CRONUSVLN": "syscall", + "syscall.ETHERTYPE_DCA": "syscall", + "syscall.ETHERTYPE_DDE": "syscall", + "syscall.ETHERTYPE_DEBNI": "syscall", + "syscall.ETHERTYPE_DECAM": "syscall", + "syscall.ETHERTYPE_DECCUST": "syscall", + "syscall.ETHERTYPE_DECDIAG": "syscall", + "syscall.ETHERTYPE_DECDNS": "syscall", + "syscall.ETHERTYPE_DECDTS": "syscall", + "syscall.ETHERTYPE_DECEXPER": "syscall", + "syscall.ETHERTYPE_DECLAST": "syscall", + "syscall.ETHERTYPE_DECLTM": "syscall", + "syscall.ETHERTYPE_DECMUMPS": "syscall", + "syscall.ETHERTYPE_DECNETBIOS": "syscall", + "syscall.ETHERTYPE_DELTACON": "syscall", + "syscall.ETHERTYPE_DIDDLE": "syscall", + "syscall.ETHERTYPE_DLOG1": "syscall", + "syscall.ETHERTYPE_DLOG2": "syscall", + "syscall.ETHERTYPE_DN": "syscall", + "syscall.ETHERTYPE_DOGFIGHT": "syscall", + "syscall.ETHERTYPE_DSMD": "syscall", + "syscall.ETHERTYPE_ECMA": "syscall", + "syscall.ETHERTYPE_ENCRYPT": "syscall", + "syscall.ETHERTYPE_ES": "syscall", + "syscall.ETHERTYPE_EXCELAN": "syscall", + "syscall.ETHERTYPE_EXPERDATA": "syscall", + "syscall.ETHERTYPE_FLIP": "syscall", + "syscall.ETHERTYPE_FLOWCONTROL": "syscall", + "syscall.ETHERTYPE_FRARP": "syscall", + "syscall.ETHERTYPE_GENDYN": "syscall", + "syscall.ETHERTYPE_HAYES": "syscall", + "syscall.ETHERTYPE_HIPPI_FP": "syscall", + "syscall.ETHERTYPE_HITACHI": "syscall", + "syscall.ETHERTYPE_HP": "syscall", + "syscall.ETHERTYPE_IEEEPUP": "syscall", + "syscall.ETHERTYPE_IEEEPUPAT": "syscall", + "syscall.ETHERTYPE_IMLBL": "syscall", + "syscall.ETHERTYPE_IMLBLDIAG": "syscall", + "syscall.ETHERTYPE_IP": "syscall", + "syscall.ETHERTYPE_IPAS": "syscall", + "syscall.ETHERTYPE_IPV6": "syscall", + "syscall.ETHERTYPE_IPX": "syscall", + "syscall.ETHERTYPE_IPXNEW": "syscall", + "syscall.ETHERTYPE_KALPANA": "syscall", + "syscall.ETHERTYPE_LANBRIDGE": "syscall", + "syscall.ETHERTYPE_LANPROBE": "syscall", + "syscall.ETHERTYPE_LAT": "syscall", + "syscall.ETHERTYPE_LBACK": "syscall", + "syscall.ETHERTYPE_LITTLE": "syscall", + "syscall.ETHERTYPE_LLDP": "syscall", + "syscall.ETHERTYPE_LOGICRAFT": "syscall", + "syscall.ETHERTYPE_LOOPBACK": "syscall", + "syscall.ETHERTYPE_MATRA": "syscall", + "syscall.ETHERTYPE_MAX": "syscall", + "syscall.ETHERTYPE_MERIT": "syscall", + "syscall.ETHERTYPE_MICP": "syscall", + "syscall.ETHERTYPE_MOPDL": "syscall", + "syscall.ETHERTYPE_MOPRC": "syscall", + "syscall.ETHERTYPE_MOTOROLA": "syscall", + "syscall.ETHERTYPE_MPLS": "syscall", + "syscall.ETHERTYPE_MPLS_MCAST": "syscall", + "syscall.ETHERTYPE_MUMPS": "syscall", + "syscall.ETHERTYPE_NBPCC": "syscall", + "syscall.ETHERTYPE_NBPCLAIM": "syscall", + "syscall.ETHERTYPE_NBPCLREQ": "syscall", + "syscall.ETHERTYPE_NBPCLRSP": "syscall", + "syscall.ETHERTYPE_NBPCREQ": "syscall", + "syscall.ETHERTYPE_NBPCRSP": "syscall", + "syscall.ETHERTYPE_NBPDG": "syscall", + "syscall.ETHERTYPE_NBPDGB": "syscall", + "syscall.ETHERTYPE_NBPDLTE": "syscall", + "syscall.ETHERTYPE_NBPRAR": "syscall", + "syscall.ETHERTYPE_NBPRAS": "syscall", + "syscall.ETHERTYPE_NBPRST": "syscall", + "syscall.ETHERTYPE_NBPSCD": "syscall", + "syscall.ETHERTYPE_NBPVCD": "syscall", + "syscall.ETHERTYPE_NBS": "syscall", + "syscall.ETHERTYPE_NCD": "syscall", + "syscall.ETHERTYPE_NESTAR": "syscall", + "syscall.ETHERTYPE_NETBEUI": "syscall", + "syscall.ETHERTYPE_NOVELL": "syscall", + "syscall.ETHERTYPE_NS": "syscall", + "syscall.ETHERTYPE_NSAT": "syscall", + "syscall.ETHERTYPE_NSCOMPAT": "syscall", + "syscall.ETHERTYPE_NTRAILER": "syscall", + "syscall.ETHERTYPE_OS9": "syscall", + "syscall.ETHERTYPE_OS9NET": "syscall", + "syscall.ETHERTYPE_PACER": "syscall", + "syscall.ETHERTYPE_PAE": "syscall", + "syscall.ETHERTYPE_PCS": "syscall", + "syscall.ETHERTYPE_PLANNING": "syscall", + "syscall.ETHERTYPE_PPP": "syscall", + "syscall.ETHERTYPE_PPPOE": "syscall", + "syscall.ETHERTYPE_PPPOEDISC": "syscall", + "syscall.ETHERTYPE_PRIMENTS": "syscall", + "syscall.ETHERTYPE_PUP": "syscall", + "syscall.ETHERTYPE_PUPAT": "syscall", + "syscall.ETHERTYPE_QINQ": "syscall", + "syscall.ETHERTYPE_RACAL": "syscall", + "syscall.ETHERTYPE_RATIONAL": "syscall", + "syscall.ETHERTYPE_RAWFR": "syscall", + "syscall.ETHERTYPE_RCL": "syscall", + "syscall.ETHERTYPE_RDP": "syscall", + "syscall.ETHERTYPE_RETIX": "syscall", + "syscall.ETHERTYPE_REVARP": "syscall", + "syscall.ETHERTYPE_SCA": "syscall", + "syscall.ETHERTYPE_SECTRA": "syscall", + "syscall.ETHERTYPE_SECUREDATA": "syscall", + "syscall.ETHERTYPE_SGITW": "syscall", + "syscall.ETHERTYPE_SG_BOUNCE": "syscall", + "syscall.ETHERTYPE_SG_DIAG": "syscall", + "syscall.ETHERTYPE_SG_NETGAMES": "syscall", + "syscall.ETHERTYPE_SG_RESV": "syscall", + "syscall.ETHERTYPE_SIMNET": "syscall", + "syscall.ETHERTYPE_SLOW": "syscall", + "syscall.ETHERTYPE_SLOWPROTOCOLS": "syscall", + "syscall.ETHERTYPE_SNA": "syscall", + "syscall.ETHERTYPE_SNMP": "syscall", + "syscall.ETHERTYPE_SONIX": "syscall", + "syscall.ETHERTYPE_SPIDER": "syscall", + "syscall.ETHERTYPE_SPRITE": "syscall", + "syscall.ETHERTYPE_STP": "syscall", + "syscall.ETHERTYPE_TALARIS": "syscall", + "syscall.ETHERTYPE_TALARISMC": "syscall", + "syscall.ETHERTYPE_TCPCOMP": "syscall", + "syscall.ETHERTYPE_TCPSM": "syscall", + "syscall.ETHERTYPE_TEC": "syscall", + "syscall.ETHERTYPE_TIGAN": "syscall", + "syscall.ETHERTYPE_TRAIL": "syscall", + "syscall.ETHERTYPE_TRANSETHER": "syscall", + "syscall.ETHERTYPE_TYMSHARE": "syscall", + "syscall.ETHERTYPE_UBBST": "syscall", + "syscall.ETHERTYPE_UBDEBUG": "syscall", + "syscall.ETHERTYPE_UBDIAGLOOP": "syscall", + "syscall.ETHERTYPE_UBDL": "syscall", + "syscall.ETHERTYPE_UBNIU": "syscall", + "syscall.ETHERTYPE_UBNMC": "syscall", + "syscall.ETHERTYPE_VALID": "syscall", + "syscall.ETHERTYPE_VARIAN": "syscall", + "syscall.ETHERTYPE_VAXELN": "syscall", + "syscall.ETHERTYPE_VEECO": "syscall", + "syscall.ETHERTYPE_VEXP": "syscall", + "syscall.ETHERTYPE_VGLAB": "syscall", + "syscall.ETHERTYPE_VINES": "syscall", + "syscall.ETHERTYPE_VINESECHO": "syscall", + "syscall.ETHERTYPE_VINESLOOP": "syscall", + "syscall.ETHERTYPE_VITAL": "syscall", + "syscall.ETHERTYPE_VLAN": "syscall", + "syscall.ETHERTYPE_VLTLMAN": "syscall", + "syscall.ETHERTYPE_VPROD": "syscall", + "syscall.ETHERTYPE_VURESERVED": "syscall", + "syscall.ETHERTYPE_WATERLOO": "syscall", + "syscall.ETHERTYPE_WELLFLEET": "syscall", + "syscall.ETHERTYPE_X25": "syscall", + "syscall.ETHERTYPE_X75": "syscall", + "syscall.ETHERTYPE_XNSSM": "syscall", + "syscall.ETHERTYPE_XTP": "syscall", + "syscall.ETHER_ADDR_LEN": "syscall", + "syscall.ETHER_ALIGN": "syscall", + "syscall.ETHER_CRC_LEN": "syscall", + "syscall.ETHER_CRC_POLY_BE": "syscall", + "syscall.ETHER_CRC_POLY_LE": "syscall", + "syscall.ETHER_HDR_LEN": "syscall", + "syscall.ETHER_MAX_DIX_LEN": 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"syscall.ETH_P_PPP_DISC": "syscall", + "syscall.ETH_P_PPP_MP": "syscall", + "syscall.ETH_P_PPP_SES": "syscall", + "syscall.ETH_P_PUP": "syscall", + "syscall.ETH_P_PUPAT": "syscall", + "syscall.ETH_P_RARP": "syscall", + "syscall.ETH_P_SCA": "syscall", + "syscall.ETH_P_SLOW": "syscall", + "syscall.ETH_P_SNAP": "syscall", + "syscall.ETH_P_TEB": "syscall", + "syscall.ETH_P_TIPC": "syscall", + "syscall.ETH_P_TRAILER": "syscall", + "syscall.ETH_P_TR_802_2": "syscall", + "syscall.ETH_P_WAN_PPP": "syscall", + "syscall.ETH_P_WCCP": "syscall", + "syscall.ETH_P_X25": "syscall", + "syscall.ETIME": "syscall", + "syscall.ETIMEDOUT": "syscall", + "syscall.ETOOMANYREFS": "syscall", + "syscall.ETXTBSY": "syscall", + "syscall.EUCLEAN": "syscall", + "syscall.EUNATCH": "syscall", + "syscall.EUSERS": "syscall", + "syscall.EVFILT_AIO": "syscall", + "syscall.EVFILT_FS": "syscall", + "syscall.EVFILT_LIO": "syscall", + "syscall.EVFILT_MACHPORT": "syscall", + "syscall.EVFILT_PROC": "syscall", + 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"syscall.FILE_SHARE_WRITE": "syscall", + "syscall.FILE_SKIP_COMPLETION_PORT_ON_SUCCESS": "syscall", + "syscall.FILE_SKIP_SET_EVENT_ON_HANDLE": "syscall", + "syscall.FILE_TYPE_CHAR": "syscall", + "syscall.FILE_TYPE_DISK": "syscall", + "syscall.FILE_TYPE_PIPE": "syscall", + "syscall.FILE_TYPE_REMOTE": "syscall", + "syscall.FILE_TYPE_UNKNOWN": "syscall", + "syscall.FILE_WRITE_ATTRIBUTES": "syscall", + "syscall.FLUSHO": "syscall", + "syscall.FORMAT_MESSAGE_ALLOCATE_BUFFER": "syscall", + "syscall.FORMAT_MESSAGE_ARGUMENT_ARRAY": "syscall", + "syscall.FORMAT_MESSAGE_FROM_HMODULE": "syscall", + "syscall.FORMAT_MESSAGE_FROM_STRING": "syscall", + "syscall.FORMAT_MESSAGE_FROM_SYSTEM": "syscall", + "syscall.FORMAT_MESSAGE_IGNORE_INSERTS": "syscall", + "syscall.FORMAT_MESSAGE_MAX_WIDTH_MASK": "syscall", + "syscall.F_ADDFILESIGS": "syscall", + "syscall.F_ADDSIGS": "syscall", + "syscall.F_ALLOCATEALL": "syscall", + "syscall.F_ALLOCATECONTIG": "syscall", + "syscall.F_CANCEL": "syscall", + 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"syscall.IFF_DYING": "syscall", + "syscall.IFF_DYNAMIC": "syscall", + "syscall.IFF_LINK0": "syscall", + "syscall.IFF_LINK1": "syscall", + "syscall.IFF_LINK2": "syscall", + "syscall.IFF_LOOPBACK": "syscall", + "syscall.IFF_MASTER": "syscall", + "syscall.IFF_MONITOR": "syscall", + "syscall.IFF_MULTICAST": "syscall", + "syscall.IFF_NOARP": "syscall", + "syscall.IFF_NOTRAILERS": "syscall", + "syscall.IFF_NO_PI": "syscall", + "syscall.IFF_OACTIVE": "syscall", + "syscall.IFF_ONE_QUEUE": "syscall", + "syscall.IFF_POINTOPOINT": "syscall", + "syscall.IFF_POINTTOPOINT": "syscall", + "syscall.IFF_PORTSEL": "syscall", + "syscall.IFF_PPROMISC": "syscall", + "syscall.IFF_PROMISC": "syscall", + "syscall.IFF_RENAMING": "syscall", + "syscall.IFF_RUNNING": "syscall", + "syscall.IFF_SIMPLEX": "syscall", + "syscall.IFF_SLAVE": "syscall", + "syscall.IFF_SMART": "syscall", + "syscall.IFF_STATICARP": "syscall", + "syscall.IFF_TAP": "syscall", + "syscall.IFF_TUN": "syscall", + "syscall.IFF_TUN_EXCL": 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"syscall.IFT_AAL2": "syscall", + "syscall.IFT_AAL5": "syscall", + "syscall.IFT_ADSL": "syscall", + "syscall.IFT_AFLANE8023": "syscall", + "syscall.IFT_AFLANE8025": "syscall", + "syscall.IFT_ARAP": "syscall", + "syscall.IFT_ARCNET": "syscall", + "syscall.IFT_ARCNETPLUS": "syscall", + "syscall.IFT_ASYNC": "syscall", + "syscall.IFT_ATM": "syscall", + "syscall.IFT_ATMDXI": "syscall", + "syscall.IFT_ATMFUNI": "syscall", + "syscall.IFT_ATMIMA": "syscall", + "syscall.IFT_ATMLOGICAL": "syscall", + "syscall.IFT_ATMRADIO": "syscall", + "syscall.IFT_ATMSUBINTERFACE": "syscall", + "syscall.IFT_ATMVCIENDPT": "syscall", + "syscall.IFT_ATMVIRTUAL": "syscall", + "syscall.IFT_BGPPOLICYACCOUNTING": "syscall", + "syscall.IFT_BLUETOOTH": "syscall", + "syscall.IFT_BRIDGE": "syscall", + "syscall.IFT_BSC": "syscall", + "syscall.IFT_CARP": "syscall", + "syscall.IFT_CCTEMUL": "syscall", + "syscall.IFT_CELLULAR": "syscall", + "syscall.IFT_CEPT": "syscall", + "syscall.IFT_CES": "syscall", + "syscall.IFT_CHANNEL": "syscall", + "syscall.IFT_CNR": "syscall", + "syscall.IFT_COFFEE": "syscall", + "syscall.IFT_COMPOSITELINK": "syscall", + "syscall.IFT_DCN": "syscall", + "syscall.IFT_DIGITALPOWERLINE": "syscall", + "syscall.IFT_DIGITALWRAPPEROVERHEADCHANNEL": "syscall", + "syscall.IFT_DLSW": "syscall", + "syscall.IFT_DOCSCABLEDOWNSTREAM": "syscall", + "syscall.IFT_DOCSCABLEMACLAYER": "syscall", + "syscall.IFT_DOCSCABLEUPSTREAM": "syscall", + "syscall.IFT_DOCSCABLEUPSTREAMCHANNEL": "syscall", + "syscall.IFT_DS0": "syscall", + "syscall.IFT_DS0BUNDLE": "syscall", + "syscall.IFT_DS1FDL": "syscall", + "syscall.IFT_DS3": "syscall", + "syscall.IFT_DTM": "syscall", + "syscall.IFT_DUMMY": "syscall", + "syscall.IFT_DVBASILN": "syscall", + "syscall.IFT_DVBASIOUT": "syscall", + "syscall.IFT_DVBRCCDOWNSTREAM": "syscall", + "syscall.IFT_DVBRCCMACLAYER": "syscall", + "syscall.IFT_DVBRCCUPSTREAM": "syscall", + "syscall.IFT_ECONET": "syscall", + "syscall.IFT_ENC": "syscall", + "syscall.IFT_EON": 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"syscall.IFT_HDSL2": "syscall", + "syscall.IFT_HIPERLAN2": "syscall", + "syscall.IFT_HIPPI": "syscall", + "syscall.IFT_HIPPIINTERFACE": "syscall", + "syscall.IFT_HOSTPAD": "syscall", + "syscall.IFT_HSSI": "syscall", + "syscall.IFT_HY": "syscall", + "syscall.IFT_IBM370PARCHAN": "syscall", + "syscall.IFT_IDSL": "syscall", + "syscall.IFT_IEEE1394": "syscall", + "syscall.IFT_IEEE80211": "syscall", + "syscall.IFT_IEEE80212": "syscall", + "syscall.IFT_IEEE8023ADLAG": "syscall", + "syscall.IFT_IFGSN": "syscall", + "syscall.IFT_IMT": "syscall", + "syscall.IFT_INFINIBAND": "syscall", + "syscall.IFT_INTERLEAVE": "syscall", + "syscall.IFT_IP": "syscall", + "syscall.IFT_IPFORWARD": "syscall", + "syscall.IFT_IPOVERATM": "syscall", + "syscall.IFT_IPOVERCDLC": "syscall", + "syscall.IFT_IPOVERCLAW": "syscall", + "syscall.IFT_IPSWITCH": "syscall", + "syscall.IFT_IPXIP": "syscall", + "syscall.IFT_ISDN": "syscall", + "syscall.IFT_ISDNBASIC": "syscall", + "syscall.IFT_ISDNPRIMARY": "syscall", + "syscall.IFT_ISDNS": "syscall", + "syscall.IFT_ISDNU": "syscall", + "syscall.IFT_ISO88022LLC": "syscall", + "syscall.IFT_ISO88023": "syscall", + "syscall.IFT_ISO88024": "syscall", + "syscall.IFT_ISO88025": "syscall", + "syscall.IFT_ISO88025CRFPINT": "syscall", + "syscall.IFT_ISO88025DTR": "syscall", + "syscall.IFT_ISO88025FIBER": "syscall", + "syscall.IFT_ISO88026": "syscall", + "syscall.IFT_ISUP": "syscall", + "syscall.IFT_L2VLAN": "syscall", + "syscall.IFT_L3IPVLAN": "syscall", + "syscall.IFT_L3IPXVLAN": "syscall", + "syscall.IFT_LAPB": "syscall", + "syscall.IFT_LAPD": "syscall", + "syscall.IFT_LAPF": "syscall", + "syscall.IFT_LINEGROUP": "syscall", + "syscall.IFT_LOCALTALK": "syscall", + "syscall.IFT_LOOP": "syscall", + "syscall.IFT_MEDIAMAILOVERIP": "syscall", + "syscall.IFT_MFSIGLINK": "syscall", + "syscall.IFT_MIOX25": "syscall", + "syscall.IFT_MODEM": "syscall", + "syscall.IFT_MPC": "syscall", + "syscall.IFT_MPLS": "syscall", + "syscall.IFT_MPLSTUNNEL": "syscall", + "syscall.IFT_MSDSL": "syscall", + "syscall.IFT_MVL": "syscall", + "syscall.IFT_MYRINET": "syscall", + "syscall.IFT_NFAS": "syscall", + "syscall.IFT_NSIP": "syscall", + "syscall.IFT_OPTICALCHANNEL": "syscall", + "syscall.IFT_OPTICALTRANSPORT": "syscall", + "syscall.IFT_OTHER": "syscall", + "syscall.IFT_P10": "syscall", + "syscall.IFT_P80": "syscall", + "syscall.IFT_PARA": "syscall", + "syscall.IFT_PDP": "syscall", + "syscall.IFT_PFLOG": "syscall", + "syscall.IFT_PFLOW": "syscall", + "syscall.IFT_PFSYNC": "syscall", + "syscall.IFT_PLC": "syscall", + "syscall.IFT_PON155": "syscall", + "syscall.IFT_PON622": "syscall", + "syscall.IFT_POS": "syscall", + "syscall.IFT_PPP": "syscall", + "syscall.IFT_PPPMULTILINKBUNDLE": "syscall", + "syscall.IFT_PROPATM": "syscall", + "syscall.IFT_PROPBWAP2MP": "syscall", + "syscall.IFT_PROPCNLS": "syscall", + "syscall.IFT_PROPDOCSWIRELESSDOWNSTREAM": "syscall", + "syscall.IFT_PROPDOCSWIRELESSMACLAYER": "syscall", + "syscall.IFT_PROPDOCSWIRELESSUPSTREAM": "syscall", + "syscall.IFT_PROPMUX": "syscall", + "syscall.IFT_PROPVIRTUAL": "syscall", + "syscall.IFT_PROPWIRELESSP2P": "syscall", + "syscall.IFT_PTPSERIAL": "syscall", + "syscall.IFT_PVC": "syscall", + "syscall.IFT_Q2931": "syscall", + "syscall.IFT_QLLC": "syscall", + "syscall.IFT_RADIOMAC": "syscall", + "syscall.IFT_RADSL": "syscall", + "syscall.IFT_REACHDSL": "syscall", + "syscall.IFT_RFC1483": "syscall", + "syscall.IFT_RS232": "syscall", + "syscall.IFT_RSRB": "syscall", + "syscall.IFT_SDLC": "syscall", + "syscall.IFT_SDSL": "syscall", + "syscall.IFT_SHDSL": "syscall", + "syscall.IFT_SIP": "syscall", + "syscall.IFT_SIPSIG": "syscall", + "syscall.IFT_SIPTG": "syscall", + "syscall.IFT_SLIP": "syscall", + "syscall.IFT_SMDSDXI": "syscall", + "syscall.IFT_SMDSICIP": "syscall", + "syscall.IFT_SONET": "syscall", + "syscall.IFT_SONETOVERHEADCHANNEL": "syscall", + "syscall.IFT_SONETPATH": "syscall", + "syscall.IFT_SONETVT": "syscall", + "syscall.IFT_SRP": "syscall", + "syscall.IFT_SS7SIGLINK": "syscall", + "syscall.IFT_STACKTOSTACK": "syscall", + "syscall.IFT_STARLAN": "syscall", + "syscall.IFT_STF": "syscall", + "syscall.IFT_T1": "syscall", + "syscall.IFT_TDLC": "syscall", + "syscall.IFT_TELINK": "syscall", + "syscall.IFT_TERMPAD": "syscall", + "syscall.IFT_TR008": "syscall", + "syscall.IFT_TRANSPHDLC": "syscall", + "syscall.IFT_TUNNEL": "syscall", + "syscall.IFT_ULTRA": "syscall", + "syscall.IFT_USB": "syscall", + "syscall.IFT_V11": "syscall", + "syscall.IFT_V35": "syscall", + "syscall.IFT_V36": "syscall", + "syscall.IFT_V37": "syscall", + "syscall.IFT_VDSL": "syscall", + "syscall.IFT_VIRTUALIPADDRESS": "syscall", + "syscall.IFT_VIRTUALTG": "syscall", + "syscall.IFT_VOICEDID": "syscall", + "syscall.IFT_VOICEEM": "syscall", + "syscall.IFT_VOICEEMFGD": "syscall", + "syscall.IFT_VOICEENCAP": "syscall", + "syscall.IFT_VOICEFGDEANA": "syscall", + "syscall.IFT_VOICEFXO": "syscall", + "syscall.IFT_VOICEFXS": "syscall", + "syscall.IFT_VOICEOVERATM": "syscall", + "syscall.IFT_VOICEOVERCABLE": "syscall", + "syscall.IFT_VOICEOVERFRAMERELAY": "syscall", + "syscall.IFT_VOICEOVERIP": "syscall", + "syscall.IFT_X213": "syscall", + "syscall.IFT_X25": "syscall", + "syscall.IFT_X25DDN": "syscall", + "syscall.IFT_X25HUNTGROUP": "syscall", + "syscall.IFT_X25MLP": "syscall", + "syscall.IFT_X25PLE": "syscall", + "syscall.IFT_XETHER": "syscall", + "syscall.IGNBRK": "syscall", + "syscall.IGNCR": "syscall", + "syscall.IGNORE": "syscall", + "syscall.IGNPAR": "syscall", + "syscall.IMAXBEL": "syscall", + "syscall.INFINITE": "syscall", + "syscall.INLCR": "syscall", + "syscall.INPCK": "syscall", + "syscall.INVALID_FILE_ATTRIBUTES": "syscall", + "syscall.IN_ACCESS": "syscall", + "syscall.IN_ALL_EVENTS": "syscall", + "syscall.IN_ATTRIB": "syscall", + "syscall.IN_CLASSA_HOST": "syscall", + "syscall.IN_CLASSA_MAX": "syscall", + "syscall.IN_CLASSA_NET": "syscall", + "syscall.IN_CLASSA_NSHIFT": "syscall", + "syscall.IN_CLASSB_HOST": "syscall", + "syscall.IN_CLASSB_MAX": "syscall", + "syscall.IN_CLASSB_NET": "syscall", + "syscall.IN_CLASSB_NSHIFT": "syscall", + "syscall.IN_CLASSC_HOST": "syscall", + "syscall.IN_CLASSC_NET": "syscall", + "syscall.IN_CLASSC_NSHIFT": "syscall", + "syscall.IN_CLASSD_HOST": "syscall", + "syscall.IN_CLASSD_NET": "syscall", + "syscall.IN_CLASSD_NSHIFT": "syscall", + "syscall.IN_CLOEXEC": "syscall", + "syscall.IN_CLOSE": "syscall", + "syscall.IN_CLOSE_NOWRITE": "syscall", + "syscall.IN_CLOSE_WRITE": "syscall", + "syscall.IN_CREATE": "syscall", + "syscall.IN_DELETE": "syscall", + "syscall.IN_DELETE_SELF": "syscall", + "syscall.IN_DONT_FOLLOW": "syscall", + "syscall.IN_EXCL_UNLINK": "syscall", + "syscall.IN_IGNORED": "syscall", + "syscall.IN_ISDIR": "syscall", + "syscall.IN_LINKLOCALNETNUM": "syscall", + "syscall.IN_LOOPBACKNET": "syscall", + "syscall.IN_MASK_ADD": "syscall", + "syscall.IN_MODIFY": "syscall", + "syscall.IN_MOVE": "syscall", + "syscall.IN_MOVED_FROM": "syscall", + "syscall.IN_MOVED_TO": "syscall", + "syscall.IN_MOVE_SELF": "syscall", + "syscall.IN_NONBLOCK": "syscall", + "syscall.IN_ONESHOT": "syscall", + "syscall.IN_ONLYDIR": "syscall", + "syscall.IN_OPEN": "syscall", + "syscall.IN_Q_OVERFLOW": "syscall", + "syscall.IN_RFC3021_HOST": "syscall", + "syscall.IN_RFC3021_MASK": "syscall", + "syscall.IN_RFC3021_NET": "syscall", + "syscall.IN_RFC3021_NSHIFT": "syscall", + "syscall.IN_UNMOUNT": "syscall", + "syscall.IOC_IN": "syscall", + "syscall.IOC_INOUT": "syscall", + "syscall.IOC_OUT": "syscall", + "syscall.IOC_VENDOR": "syscall", + "syscall.IOC_WS2": "syscall", + "syscall.IPMreq": "syscall", + "syscall.IPMreqn": "syscall", + "syscall.IPPROTO_3PC": "syscall", + "syscall.IPPROTO_ADFS": "syscall", + "syscall.IPPROTO_AH": "syscall", + "syscall.IPPROTO_AHIP": "syscall", + "syscall.IPPROTO_APES": "syscall", + "syscall.IPPROTO_ARGUS": "syscall", + "syscall.IPPROTO_AX25": "syscall", + "syscall.IPPROTO_BHA": "syscall", + "syscall.IPPROTO_BLT": "syscall", + "syscall.IPPROTO_BRSATMON": "syscall", + "syscall.IPPROTO_CARP": "syscall", + "syscall.IPPROTO_CFTP": "syscall", + "syscall.IPPROTO_CHAOS": "syscall", + "syscall.IPPROTO_CMTP": "syscall", + "syscall.IPPROTO_COMP": "syscall", + "syscall.IPPROTO_CPHB": "syscall", + "syscall.IPPROTO_CPNX": "syscall", + "syscall.IPPROTO_DCCP": "syscall", + "syscall.IPPROTO_DDP": "syscall", + "syscall.IPPROTO_DGP": "syscall", + "syscall.IPPROTO_DIVERT": "syscall", + "syscall.IPPROTO_DIVERT_INIT": "syscall", + "syscall.IPPROTO_DIVERT_RESP": "syscall", + "syscall.IPPROTO_DONE": "syscall", + "syscall.IPPROTO_DSTOPTS": "syscall", + "syscall.IPPROTO_EGP": "syscall", + "syscall.IPPROTO_EMCON": "syscall", + "syscall.IPPROTO_ENCAP": "syscall", + "syscall.IPPROTO_EON": "syscall", + "syscall.IPPROTO_ESP": "syscall", + "syscall.IPPROTO_ETHERIP": "syscall", + "syscall.IPPROTO_FRAGMENT": "syscall", + "syscall.IPPROTO_GGP": "syscall", + "syscall.IPPROTO_GMTP": "syscall", + "syscall.IPPROTO_GRE": "syscall", + "syscall.IPPROTO_HELLO": "syscall", + "syscall.IPPROTO_HMP": "syscall", + "syscall.IPPROTO_HOPOPTS": "syscall", + "syscall.IPPROTO_ICMP": "syscall", + "syscall.IPPROTO_ICMPV6": "syscall", + "syscall.IPPROTO_IDP": "syscall", + "syscall.IPPROTO_IDPR": "syscall", + "syscall.IPPROTO_IDRP": "syscall", + "syscall.IPPROTO_IGMP": "syscall", + "syscall.IPPROTO_IGP": "syscall", + "syscall.IPPROTO_IGRP": "syscall", + "syscall.IPPROTO_IL": "syscall", + "syscall.IPPROTO_INLSP": "syscall", + "syscall.IPPROTO_INP": "syscall", + "syscall.IPPROTO_IP": "syscall", + "syscall.IPPROTO_IPCOMP": "syscall", + "syscall.IPPROTO_IPCV": "syscall", + "syscall.IPPROTO_IPEIP": "syscall", + "syscall.IPPROTO_IPIP": "syscall", + "syscall.IPPROTO_IPPC": "syscall", + "syscall.IPPROTO_IPV4": "syscall", + "syscall.IPPROTO_IPV6": "syscall", + "syscall.IPPROTO_IPV6_ICMP": "syscall", + "syscall.IPPROTO_IRTP": "syscall", + "syscall.IPPROTO_KRYPTOLAN": "syscall", + "syscall.IPPROTO_LARP": "syscall", + "syscall.IPPROTO_LEAF1": "syscall", + "syscall.IPPROTO_LEAF2": "syscall", + "syscall.IPPROTO_MAX": "syscall", + "syscall.IPPROTO_MAXID": "syscall", + "syscall.IPPROTO_MEAS": "syscall", + "syscall.IPPROTO_MH": "syscall", + "syscall.IPPROTO_MHRP": "syscall", + "syscall.IPPROTO_MICP": "syscall", + "syscall.IPPROTO_MOBILE": "syscall", + "syscall.IPPROTO_MPLS": "syscall", + "syscall.IPPROTO_MTP": "syscall", + "syscall.IPPROTO_MUX": "syscall", + "syscall.IPPROTO_ND": "syscall", + "syscall.IPPROTO_NHRP": "syscall", + "syscall.IPPROTO_NONE": "syscall", + "syscall.IPPROTO_NSP": "syscall", + "syscall.IPPROTO_NVPII": "syscall", + "syscall.IPPROTO_OLD_DIVERT": "syscall", + "syscall.IPPROTO_OSPFIGP": "syscall", + "syscall.IPPROTO_PFSYNC": "syscall", + "syscall.IPPROTO_PGM": "syscall", + "syscall.IPPROTO_PIGP": "syscall", + "syscall.IPPROTO_PIM": "syscall", + "syscall.IPPROTO_PRM": "syscall", + "syscall.IPPROTO_PUP": "syscall", + "syscall.IPPROTO_PVP": "syscall", + "syscall.IPPROTO_RAW": "syscall", + "syscall.IPPROTO_RCCMON": "syscall", + "syscall.IPPROTO_RDP": "syscall", + "syscall.IPPROTO_ROUTING": "syscall", + "syscall.IPPROTO_RSVP": "syscall", + "syscall.IPPROTO_RVD": "syscall", + "syscall.IPPROTO_SATEXPAK": "syscall", + "syscall.IPPROTO_SATMON": "syscall", + "syscall.IPPROTO_SCCSP": "syscall", + "syscall.IPPROTO_SCTP": "syscall", + "syscall.IPPROTO_SDRP": "syscall", + "syscall.IPPROTO_SEND": "syscall", + "syscall.IPPROTO_SEP": "syscall", + "syscall.IPPROTO_SKIP": "syscall", + "syscall.IPPROTO_SPACER": "syscall", + "syscall.IPPROTO_SRPC": "syscall", + "syscall.IPPROTO_ST": "syscall", + "syscall.IPPROTO_SVMTP": "syscall", + "syscall.IPPROTO_SWIPE": "syscall", + "syscall.IPPROTO_TCF": "syscall", + "syscall.IPPROTO_TCP": "syscall", + "syscall.IPPROTO_TLSP": "syscall", + "syscall.IPPROTO_TP": "syscall", + "syscall.IPPROTO_TPXX": "syscall", + "syscall.IPPROTO_TRUNK1": "syscall", + "syscall.IPPROTO_TRUNK2": "syscall", + "syscall.IPPROTO_TTP": "syscall", + "syscall.IPPROTO_UDP": "syscall", + "syscall.IPPROTO_UDPLITE": "syscall", + "syscall.IPPROTO_VINES": "syscall", + "syscall.IPPROTO_VISA": "syscall", + "syscall.IPPROTO_VMTP": "syscall", + "syscall.IPPROTO_VRRP": "syscall", + "syscall.IPPROTO_WBEXPAK": "syscall", + "syscall.IPPROTO_WBMON": "syscall", + "syscall.IPPROTO_WSN": "syscall", + "syscall.IPPROTO_XNET": "syscall", + "syscall.IPPROTO_XTP": "syscall", + "syscall.IPV6_2292DSTOPTS": "syscall", + "syscall.IPV6_2292HOPLIMIT": "syscall", + "syscall.IPV6_2292HOPOPTS": "syscall", + "syscall.IPV6_2292NEXTHOP": "syscall", + "syscall.IPV6_2292PKTINFO": "syscall", + "syscall.IPV6_2292PKTOPTIONS": "syscall", + "syscall.IPV6_2292RTHDR": "syscall", + "syscall.IPV6_ADDRFORM": "syscall", + "syscall.IPV6_ADD_MEMBERSHIP": "syscall", + "syscall.IPV6_AUTHHDR": "syscall", + "syscall.IPV6_AUTH_LEVEL": "syscall", + "syscall.IPV6_AUTOFLOWLABEL": "syscall", + "syscall.IPV6_BINDANY": "syscall", + "syscall.IPV6_BINDV6ONLY": "syscall", + "syscall.IPV6_BOUND_IF": "syscall", + "syscall.IPV6_CHECKSUM": "syscall", + "syscall.IPV6_DEFAULT_MULTICAST_HOPS": "syscall", + "syscall.IPV6_DEFAULT_MULTICAST_LOOP": "syscall", + "syscall.IPV6_DEFHLIM": "syscall", + "syscall.IPV6_DONTFRAG": "syscall", + "syscall.IPV6_DROP_MEMBERSHIP": "syscall", + "syscall.IPV6_DSTOPTS": "syscall", + "syscall.IPV6_ESP_NETWORK_LEVEL": "syscall", + "syscall.IPV6_ESP_TRANS_LEVEL": "syscall", + "syscall.IPV6_FAITH": "syscall", + "syscall.IPV6_FLOWINFO_MASK": "syscall", + "syscall.IPV6_FLOWLABEL_MASK": "syscall", + "syscall.IPV6_FRAGTTL": "syscall", + "syscall.IPV6_FW_ADD": "syscall", + "syscall.IPV6_FW_DEL": "syscall", + "syscall.IPV6_FW_FLUSH": "syscall", + "syscall.IPV6_FW_GET": "syscall", + "syscall.IPV6_FW_ZERO": "syscall", + "syscall.IPV6_HLIMDEC": "syscall", + "syscall.IPV6_HOPLIMIT": "syscall", + "syscall.IPV6_HOPOPTS": "syscall", + "syscall.IPV6_IPCOMP_LEVEL": "syscall", + "syscall.IPV6_IPSEC_POLICY": "syscall", + "syscall.IPV6_JOIN_ANYCAST": "syscall", + "syscall.IPV6_JOIN_GROUP": "syscall", + "syscall.IPV6_LEAVE_ANYCAST": "syscall", + "syscall.IPV6_LEAVE_GROUP": "syscall", + "syscall.IPV6_MAXHLIM": "syscall", + "syscall.IPV6_MAXOPTHDR": "syscall", + "syscall.IPV6_MAXPACKET": "syscall", + "syscall.IPV6_MAX_GROUP_SRC_FILTER": "syscall", + "syscall.IPV6_MAX_MEMBERSHIPS": "syscall", + "syscall.IPV6_MAX_SOCK_SRC_FILTER": "syscall", + "syscall.IPV6_MIN_MEMBERSHIPS": "syscall", + "syscall.IPV6_MMTU": "syscall", + "syscall.IPV6_MSFILTER": "syscall", + "syscall.IPV6_MTU": "syscall", + "syscall.IPV6_MTU_DISCOVER": "syscall", + "syscall.IPV6_MULTICAST_HOPS": "syscall", + "syscall.IPV6_MULTICAST_IF": "syscall", + "syscall.IPV6_MULTICAST_LOOP": "syscall", + "syscall.IPV6_NEXTHOP": "syscall", + "syscall.IPV6_OPTIONS": "syscall", + "syscall.IPV6_PATHMTU": "syscall", + "syscall.IPV6_PIPEX": "syscall", + "syscall.IPV6_PKTINFO": "syscall", + "syscall.IPV6_PMTUDISC_DO": "syscall", + "syscall.IPV6_PMTUDISC_DONT": "syscall", + "syscall.IPV6_PMTUDISC_PROBE": "syscall", + "syscall.IPV6_PMTUDISC_WANT": "syscall", + "syscall.IPV6_PORTRANGE": "syscall", + "syscall.IPV6_PORTRANGE_DEFAULT": "syscall", + "syscall.IPV6_PORTRANGE_HIGH": "syscall", + "syscall.IPV6_PORTRANGE_LOW": "syscall", + "syscall.IPV6_PREFER_TEMPADDR": "syscall", + "syscall.IPV6_RECVDSTOPTS": "syscall", + "syscall.IPV6_RECVDSTPORT": "syscall", + "syscall.IPV6_RECVERR": "syscall", + "syscall.IPV6_RECVHOPLIMIT": "syscall", + "syscall.IPV6_RECVHOPOPTS": "syscall", + "syscall.IPV6_RECVPATHMTU": "syscall", + "syscall.IPV6_RECVPKTINFO": "syscall", + "syscall.IPV6_RECVRTHDR": "syscall", + "syscall.IPV6_RECVTCLASS": "syscall", + "syscall.IPV6_ROUTER_ALERT": "syscall", + "syscall.IPV6_RTABLE": "syscall", + "syscall.IPV6_RTHDR": "syscall", + "syscall.IPV6_RTHDRDSTOPTS": "syscall", + "syscall.IPV6_RTHDR_LOOSE": "syscall", + "syscall.IPV6_RTHDR_STRICT": "syscall", + "syscall.IPV6_RTHDR_TYPE_0": "syscall", + "syscall.IPV6_RXDSTOPTS": "syscall", + "syscall.IPV6_RXHOPOPTS": "syscall", + "syscall.IPV6_SOCKOPT_RESERVED1": "syscall", + "syscall.IPV6_TCLASS": "syscall", + "syscall.IPV6_UNICAST_HOPS": "syscall", + "syscall.IPV6_USE_MIN_MTU": "syscall", + "syscall.IPV6_V6ONLY": "syscall", + "syscall.IPV6_VERSION": "syscall", + "syscall.IPV6_VERSION_MASK": "syscall", + "syscall.IPV6_XFRM_POLICY": "syscall", + "syscall.IP_ADD_MEMBERSHIP": "syscall", + "syscall.IP_ADD_SOURCE_MEMBERSHIP": "syscall", + "syscall.IP_AUTH_LEVEL": "syscall", + "syscall.IP_BINDANY": "syscall", + "syscall.IP_BLOCK_SOURCE": "syscall", + "syscall.IP_BOUND_IF": "syscall", + "syscall.IP_DEFAULT_MULTICAST_LOOP": "syscall", + "syscall.IP_DEFAULT_MULTICAST_TTL": "syscall", + "syscall.IP_DF": "syscall", + "syscall.IP_DIVERTFL": "syscall", + "syscall.IP_DONTFRAG": "syscall", + "syscall.IP_DROP_MEMBERSHIP": "syscall", + "syscall.IP_DROP_SOURCE_MEMBERSHIP": "syscall", + "syscall.IP_DUMMYNET3": "syscall", + "syscall.IP_DUMMYNET_CONFIGURE": "syscall", + "syscall.IP_DUMMYNET_DEL": "syscall", + "syscall.IP_DUMMYNET_FLUSH": "syscall", + "syscall.IP_DUMMYNET_GET": "syscall", + "syscall.IP_EF": "syscall", + "syscall.IP_ERRORMTU": "syscall", + "syscall.IP_ESP_NETWORK_LEVEL": "syscall", + "syscall.IP_ESP_TRANS_LEVEL": "syscall", + "syscall.IP_FAITH": "syscall", + "syscall.IP_FREEBIND": "syscall", + "syscall.IP_FW3": "syscall", + "syscall.IP_FW_ADD": "syscall", + "syscall.IP_FW_DEL": "syscall", + "syscall.IP_FW_FLUSH": "syscall", + "syscall.IP_FW_GET": "syscall", + "syscall.IP_FW_NAT_CFG": "syscall", + "syscall.IP_FW_NAT_DEL": "syscall", + "syscall.IP_FW_NAT_GET_CONFIG": "syscall", + "syscall.IP_FW_NAT_GET_LOG": "syscall", + "syscall.IP_FW_RESETLOG": "syscall", + "syscall.IP_FW_TABLE_ADD": "syscall", + "syscall.IP_FW_TABLE_DEL": "syscall", + "syscall.IP_FW_TABLE_FLUSH": "syscall", + "syscall.IP_FW_TABLE_GETSIZE": "syscall", + "syscall.IP_FW_TABLE_LIST": "syscall", + "syscall.IP_FW_ZERO": "syscall", + "syscall.IP_HDRINCL": "syscall", + "syscall.IP_IPCOMP_LEVEL": "syscall", + "syscall.IP_IPSECFLOWINFO": "syscall", + "syscall.IP_IPSEC_LOCAL_AUTH": "syscall", + "syscall.IP_IPSEC_LOCAL_CRED": "syscall", + "syscall.IP_IPSEC_LOCAL_ID": "syscall", + "syscall.IP_IPSEC_POLICY": "syscall", + "syscall.IP_IPSEC_REMOTE_AUTH": "syscall", + "syscall.IP_IPSEC_REMOTE_CRED": "syscall", + "syscall.IP_IPSEC_REMOTE_ID": "syscall", + "syscall.IP_MAXPACKET": "syscall", + "syscall.IP_MAX_GROUP_SRC_FILTER": "syscall", + "syscall.IP_MAX_MEMBERSHIPS": "syscall", + "syscall.IP_MAX_SOCK_MUTE_FILTER": "syscall", + "syscall.IP_MAX_SOCK_SRC_FILTER": "syscall", + "syscall.IP_MAX_SOURCE_FILTER": "syscall", + "syscall.IP_MF": "syscall", + "syscall.IP_MINFRAGSIZE": "syscall", + "syscall.IP_MINTTL": "syscall", + "syscall.IP_MIN_MEMBERSHIPS": "syscall", + "syscall.IP_MSFILTER": "syscall", + "syscall.IP_MSS": "syscall", + "syscall.IP_MTU": "syscall", + "syscall.IP_MTU_DISCOVER": "syscall", + "syscall.IP_MULTICAST_IF": "syscall", + "syscall.IP_MULTICAST_IFINDEX": "syscall", + "syscall.IP_MULTICAST_LOOP": "syscall", + "syscall.IP_MULTICAST_TTL": "syscall", + "syscall.IP_MULTICAST_VIF": "syscall", + "syscall.IP_NAT__XXX": "syscall", + "syscall.IP_OFFMASK": "syscall", + "syscall.IP_OLD_FW_ADD": "syscall", + "syscall.IP_OLD_FW_DEL": "syscall", + "syscall.IP_OLD_FW_FLUSH": "syscall", + "syscall.IP_OLD_FW_GET": "syscall", + "syscall.IP_OLD_FW_RESETLOG": "syscall", + "syscall.IP_OLD_FW_ZERO": "syscall", + "syscall.IP_ONESBCAST": "syscall", + "syscall.IP_OPTIONS": "syscall", + "syscall.IP_ORIGDSTADDR": "syscall", + "syscall.IP_PASSSEC": "syscall", + "syscall.IP_PIPEX": "syscall", + "syscall.IP_PKTINFO": "syscall", + "syscall.IP_PKTOPTIONS": "syscall", + "syscall.IP_PMTUDISC": "syscall", + "syscall.IP_PMTUDISC_DO": "syscall", + "syscall.IP_PMTUDISC_DONT": "syscall", + "syscall.IP_PMTUDISC_PROBE": "syscall", + "syscall.IP_PMTUDISC_WANT": "syscall", + "syscall.IP_PORTRANGE": "syscall", + "syscall.IP_PORTRANGE_DEFAULT": "syscall", + "syscall.IP_PORTRANGE_HIGH": 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"syscall.SIGWINCH": "syscall", + "syscall.SIGXCPU": "syscall", + "syscall.SIGXFSZ": "syscall", + "syscall.SIOCADDDLCI": "syscall", + "syscall.SIOCADDMULTI": "syscall", + "syscall.SIOCADDRT": "syscall", + "syscall.SIOCAIFADDR": "syscall", + "syscall.SIOCAIFGROUP": "syscall", + "syscall.SIOCALIFADDR": "syscall", + "syscall.SIOCARPIPLL": "syscall", + "syscall.SIOCATMARK": "syscall", + "syscall.SIOCAUTOADDR": "syscall", + "syscall.SIOCAUTONETMASK": "syscall", + "syscall.SIOCBRDGADD": "syscall", + "syscall.SIOCBRDGADDS": "syscall", + "syscall.SIOCBRDGARL": "syscall", + "syscall.SIOCBRDGDADDR": "syscall", + "syscall.SIOCBRDGDEL": "syscall", + "syscall.SIOCBRDGDELS": "syscall", + "syscall.SIOCBRDGFLUSH": "syscall", + "syscall.SIOCBRDGFRL": "syscall", + "syscall.SIOCBRDGGCACHE": "syscall", + "syscall.SIOCBRDGGFD": "syscall", + "syscall.SIOCBRDGGHT": "syscall", + "syscall.SIOCBRDGGIFFLGS": "syscall", + "syscall.SIOCBRDGGMA": "syscall", + "syscall.SIOCBRDGGPARAM": "syscall", + "syscall.SIOCBRDGGPRI": "syscall", + "syscall.SIOCBRDGGRL": "syscall", + "syscall.SIOCBRDGGSIFS": "syscall", + "syscall.SIOCBRDGGTO": "syscall", + "syscall.SIOCBRDGIFS": "syscall", + "syscall.SIOCBRDGRTS": "syscall", + "syscall.SIOCBRDGSADDR": "syscall", + "syscall.SIOCBRDGSCACHE": "syscall", + "syscall.SIOCBRDGSFD": "syscall", + "syscall.SIOCBRDGSHT": "syscall", + "syscall.SIOCBRDGSIFCOST": "syscall", + "syscall.SIOCBRDGSIFFLGS": "syscall", + "syscall.SIOCBRDGSIFPRIO": "syscall", + "syscall.SIOCBRDGSMA": "syscall", + "syscall.SIOCBRDGSPRI": "syscall", + "syscall.SIOCBRDGSPROTO": "syscall", + "syscall.SIOCBRDGSTO": "syscall", + "syscall.SIOCBRDGSTXHC": "syscall", + "syscall.SIOCDARP": "syscall", + "syscall.SIOCDELDLCI": "syscall", + "syscall.SIOCDELMULTI": "syscall", + "syscall.SIOCDELRT": "syscall", + "syscall.SIOCDEVPRIVATE": "syscall", + "syscall.SIOCDIFADDR": "syscall", + "syscall.SIOCDIFGROUP": "syscall", + "syscall.SIOCDIFPHYADDR": "syscall", + "syscall.SIOCDLIFADDR": "syscall", 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"syscall.SIOCGIFENCAP": "syscall", + "syscall.SIOCGIFFIB": "syscall", + "syscall.SIOCGIFFLAGS": "syscall", + "syscall.SIOCGIFGATTR": "syscall", + "syscall.SIOCGIFGENERIC": "syscall", + "syscall.SIOCGIFGMEMB": "syscall", + "syscall.SIOCGIFGROUP": "syscall", + "syscall.SIOCGIFHARDMTU": "syscall", + "syscall.SIOCGIFHWADDR": "syscall", + "syscall.SIOCGIFINDEX": "syscall", + "syscall.SIOCGIFKPI": "syscall", + "syscall.SIOCGIFMAC": "syscall", + "syscall.SIOCGIFMAP": "syscall", + "syscall.SIOCGIFMEDIA": "syscall", + "syscall.SIOCGIFMEM": "syscall", + "syscall.SIOCGIFMETRIC": "syscall", + "syscall.SIOCGIFMTU": "syscall", + "syscall.SIOCGIFNAME": "syscall", + "syscall.SIOCGIFNETMASK": "syscall", + "syscall.SIOCGIFPDSTADDR": "syscall", + "syscall.SIOCGIFPFLAGS": "syscall", + "syscall.SIOCGIFPHYS": "syscall", + "syscall.SIOCGIFPRIORITY": "syscall", + "syscall.SIOCGIFPSRCADDR": "syscall", + "syscall.SIOCGIFRDOMAIN": "syscall", + "syscall.SIOCGIFRTLABEL": "syscall", + "syscall.SIOCGIFSLAVE": 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"syscall.SIOCSIFHWBROADCAST": "syscall", + "syscall.SIOCSIFKPI": "syscall", + "syscall.SIOCSIFLINK": "syscall", + "syscall.SIOCSIFLLADDR": "syscall", + "syscall.SIOCSIFMAC": "syscall", + "syscall.SIOCSIFMAP": "syscall", + "syscall.SIOCSIFMEDIA": "syscall", + "syscall.SIOCSIFMEM": "syscall", + "syscall.SIOCSIFMETRIC": "syscall", + "syscall.SIOCSIFMTU": "syscall", + "syscall.SIOCSIFNAME": "syscall", + "syscall.SIOCSIFNETMASK": "syscall", + "syscall.SIOCSIFPFLAGS": "syscall", + "syscall.SIOCSIFPHYADDR": "syscall", + "syscall.SIOCSIFPHYS": "syscall", + "syscall.SIOCSIFPRIORITY": "syscall", + "syscall.SIOCSIFRDOMAIN": "syscall", + "syscall.SIOCSIFRTLABEL": "syscall", + "syscall.SIOCSIFRVNET": "syscall", + "syscall.SIOCSIFSLAVE": "syscall", + "syscall.SIOCSIFTIMESLOT": "syscall", + "syscall.SIOCSIFTXQLEN": "syscall", + "syscall.SIOCSIFVLAN": "syscall", + "syscall.SIOCSIFVNET": "syscall", + "syscall.SIOCSIFXFLAGS": "syscall", + "syscall.SIOCSLIFPHYADDR": "syscall", + "syscall.SIOCSLIFPHYRTABLE": "syscall", + "syscall.SIOCSLIFPHYTTL": "syscall", + "syscall.SIOCSLINKSTR": "syscall", + "syscall.SIOCSLOWAT": "syscall", + "syscall.SIOCSPGRP": "syscall", + "syscall.SIOCSRARP": "syscall", + "syscall.SIOCSSPPPPARAMS": "syscall", + "syscall.SIOCSVH": "syscall", + "syscall.SIOCSVNETID": "syscall", + "syscall.SIOCZIFDATA": "syscall", + "syscall.SIO_GET_EXTENSION_FUNCTION_POINTER": "syscall", + "syscall.SIO_GET_INTERFACE_LIST": "syscall", + "syscall.SIO_KEEPALIVE_VALS": "syscall", + "syscall.SOCK_CLOEXEC": "syscall", + "syscall.SOCK_DCCP": "syscall", + "syscall.SOCK_DGRAM": "syscall", + "syscall.SOCK_FLAGS_MASK": "syscall", + "syscall.SOCK_MAXADDRLEN": "syscall", + "syscall.SOCK_NONBLOCK": "syscall", + "syscall.SOCK_NOSIGPIPE": "syscall", + "syscall.SOCK_PACKET": "syscall", + "syscall.SOCK_RAW": "syscall", + "syscall.SOCK_RDM": "syscall", + "syscall.SOCK_SEQPACKET": "syscall", + "syscall.SOCK_STREAM": "syscall", + "syscall.SOL_AAL": "syscall", + 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"syscall.SO_LINGER": "syscall", + "syscall.SO_LINGER_SEC": "syscall", + "syscall.SO_LISTENINCQLEN": "syscall", + "syscall.SO_LISTENQLEN": "syscall", + "syscall.SO_LISTENQLIMIT": "syscall", + "syscall.SO_MARK": "syscall", + "syscall.SO_NETPROC": "syscall", + "syscall.SO_NKE": "syscall", + "syscall.SO_NOADDRERR": "syscall", + "syscall.SO_NOHEADER": "syscall", + "syscall.SO_NOSIGPIPE": "syscall", + "syscall.SO_NOTIFYCONFLICT": "syscall", + "syscall.SO_NO_CHECK": "syscall", + "syscall.SO_NO_DDP": "syscall", + "syscall.SO_NO_OFFLOAD": "syscall", + "syscall.SO_NP_EXTENSIONS": "syscall", + "syscall.SO_NREAD": "syscall", + "syscall.SO_NWRITE": "syscall", + "syscall.SO_OOBINLINE": "syscall", + "syscall.SO_OVERFLOWED": "syscall", + "syscall.SO_PASSCRED": "syscall", + "syscall.SO_PASSSEC": "syscall", + "syscall.SO_PEERCRED": "syscall", + "syscall.SO_PEERLABEL": "syscall", + "syscall.SO_PEERNAME": "syscall", + "syscall.SO_PEERSEC": "syscall", + "syscall.SO_PRIORITY": "syscall", + "syscall.SO_PROTOCOL": "syscall", + "syscall.SO_PROTOTYPE": "syscall", + "syscall.SO_RANDOMPORT": "syscall", + "syscall.SO_RCVBUF": "syscall", + "syscall.SO_RCVBUFFORCE": "syscall", + "syscall.SO_RCVLOWAT": "syscall", + "syscall.SO_RCVTIMEO": "syscall", + "syscall.SO_RESTRICTIONS": "syscall", + "syscall.SO_RESTRICT_DENYIN": "syscall", + "syscall.SO_RESTRICT_DENYOUT": "syscall", + "syscall.SO_RESTRICT_DENYSET": "syscall", + "syscall.SO_REUSEADDR": "syscall", + "syscall.SO_REUSEPORT": "syscall", + "syscall.SO_REUSESHAREUID": "syscall", + "syscall.SO_RTABLE": "syscall", + "syscall.SO_RXQ_OVFL": "syscall", + "syscall.SO_SECURITY_AUTHENTICATION": "syscall", + "syscall.SO_SECURITY_ENCRYPTION_NETWORK": "syscall", + "syscall.SO_SECURITY_ENCRYPTION_TRANSPORT": "syscall", + "syscall.SO_SETFIB": "syscall", + "syscall.SO_SNDBUF": "syscall", + "syscall.SO_SNDBUFFORCE": "syscall", + "syscall.SO_SNDLOWAT": "syscall", + "syscall.SO_SNDTIMEO": "syscall", + "syscall.SO_SPLICE": "syscall", + 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"syscall.STD_OUTPUT_HANDLE": "syscall", + "syscall.SUBLANG_ENGLISH_US": "syscall", + "syscall.SW_FORCEMINIMIZE": "syscall", + "syscall.SW_HIDE": "syscall", + "syscall.SW_MAXIMIZE": "syscall", + "syscall.SW_MINIMIZE": "syscall", + "syscall.SW_NORMAL": "syscall", + "syscall.SW_RESTORE": "syscall", + "syscall.SW_SHOW": "syscall", + "syscall.SW_SHOWDEFAULT": "syscall", + "syscall.SW_SHOWMAXIMIZED": "syscall", + "syscall.SW_SHOWMINIMIZED": "syscall", + "syscall.SW_SHOWMINNOACTIVE": "syscall", + "syscall.SW_SHOWNA": "syscall", + "syscall.SW_SHOWNOACTIVATE": "syscall", + "syscall.SW_SHOWNORMAL": "syscall", + "syscall.SYNCHRONIZE": "syscall", + "syscall.SYSCTL_VERSION": "syscall", + "syscall.SYSCTL_VERS_0": "syscall", + "syscall.SYSCTL_VERS_1": "syscall", + "syscall.SYSCTL_VERS_MASK": "syscall", + "syscall.SYS_ABORT2": "syscall", + "syscall.SYS_ACCEPT": "syscall", + "syscall.SYS_ACCEPT4": "syscall", + "syscall.SYS_ACCEPT_NOCANCEL": "syscall", + "syscall.SYS_ACCESS": "syscall", + 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"syscall.SYS_CPUSET": "syscall", + "syscall.SYS_CPUSET_GETAFFINITY": "syscall", + "syscall.SYS_CPUSET_GETID": "syscall", + "syscall.SYS_CPUSET_SETAFFINITY": "syscall", + "syscall.SYS_CPUSET_SETID": "syscall", + "syscall.SYS_CREAT": "syscall", + "syscall.SYS_CREATE_MODULE": "syscall", + "syscall.SYS_CSOPS": "syscall", + "syscall.SYS_DELETE": "syscall", + "syscall.SYS_DELETE_MODULE": "syscall", + "syscall.SYS_DUP": "syscall", + "syscall.SYS_DUP2": "syscall", + "syscall.SYS_DUP3": "syscall", + "syscall.SYS_EACCESS": "syscall", + "syscall.SYS_EPOLL_CREATE": "syscall", + "syscall.SYS_EPOLL_CREATE1": "syscall", + "syscall.SYS_EPOLL_CTL": "syscall", + "syscall.SYS_EPOLL_CTL_OLD": "syscall", + "syscall.SYS_EPOLL_PWAIT": "syscall", + "syscall.SYS_EPOLL_WAIT": "syscall", + "syscall.SYS_EPOLL_WAIT_OLD": "syscall", + "syscall.SYS_EVENTFD": "syscall", + "syscall.SYS_EVENTFD2": "syscall", + "syscall.SYS_EXCHANGEDATA": "syscall", + "syscall.SYS_EXECVE": "syscall", + "syscall.SYS_EXIT": "syscall", + 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"syscall", + "syscall.SYS_PWRITEV": "syscall", + "syscall.SYS_PWRITE_NOCANCEL": "syscall", + "syscall.SYS_QUERY_MODULE": "syscall", + "syscall.SYS_QUOTACTL": "syscall", + "syscall.SYS_RASCTL": "syscall", + "syscall.SYS_RCTL_ADD_RULE": "syscall", + "syscall.SYS_RCTL_GET_LIMITS": "syscall", + "syscall.SYS_RCTL_GET_RACCT": "syscall", + "syscall.SYS_RCTL_GET_RULES": "syscall", + "syscall.SYS_RCTL_REMOVE_RULE": "syscall", + "syscall.SYS_READ": "syscall", + "syscall.SYS_READAHEAD": "syscall", + "syscall.SYS_READDIR": "syscall", + "syscall.SYS_READLINK": "syscall", + "syscall.SYS_READLINKAT": "syscall", + "syscall.SYS_READV": "syscall", + "syscall.SYS_READV_NOCANCEL": "syscall", + "syscall.SYS_READ_NOCANCEL": "syscall", + "syscall.SYS_REBOOT": "syscall", + "syscall.SYS_RECV": "syscall", + "syscall.SYS_RECVFROM": "syscall", + "syscall.SYS_RECVFROM_NOCANCEL": "syscall", + "syscall.SYS_RECVMMSG": "syscall", + "syscall.SYS_RECVMSG": "syscall", + "syscall.SYS_RECVMSG_NOCANCEL": "syscall", + 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"syscall.SYS_THR_SELF": "syscall", + "syscall.SYS_THR_SET_NAME": "syscall", + "syscall.SYS_THR_SUSPEND": "syscall", + "syscall.SYS_THR_WAKE": "syscall", + "syscall.SYS_TIME": "syscall", + "syscall.SYS_TIMERFD_CREATE": "syscall", + "syscall.SYS_TIMERFD_GETTIME": "syscall", + "syscall.SYS_TIMERFD_SETTIME": "syscall", + "syscall.SYS_TIMER_CREATE": "syscall", + "syscall.SYS_TIMER_DELETE": "syscall", + "syscall.SYS_TIMER_GETOVERRUN": "syscall", + "syscall.SYS_TIMER_GETTIME": "syscall", + "syscall.SYS_TIMER_SETTIME": "syscall", + "syscall.SYS_TIMES": "syscall", + "syscall.SYS_TKILL": "syscall", + "syscall.SYS_TRUNCATE": "syscall", + "syscall.SYS_TRUNCATE64": "syscall", + "syscall.SYS_TUXCALL": "syscall", + "syscall.SYS_UGETRLIMIT": "syscall", + "syscall.SYS_ULIMIT": "syscall", + "syscall.SYS_UMASK": "syscall", + "syscall.SYS_UMASK_EXTENDED": "syscall", + "syscall.SYS_UMOUNT": "syscall", + "syscall.SYS_UMOUNT2": "syscall", + "syscall.SYS_UNAME": "syscall", + "syscall.SYS_UNDELETE": "syscall", + "syscall.SYS_UNLINK": "syscall", + "syscall.SYS_UNLINKAT": "syscall", + "syscall.SYS_UNMOUNT": "syscall", + "syscall.SYS_UNSHARE": "syscall", + "syscall.SYS_USELIB": "syscall", + "syscall.SYS_USTAT": "syscall", + "syscall.SYS_UTIME": "syscall", + "syscall.SYS_UTIMENSAT": "syscall", + "syscall.SYS_UTIMES": "syscall", + "syscall.SYS_UTRACE": "syscall", + "syscall.SYS_UUIDGEN": "syscall", + "syscall.SYS_VADVISE": "syscall", + "syscall.SYS_VFORK": "syscall", + "syscall.SYS_VHANGUP": "syscall", + "syscall.SYS_VM86": "syscall", + "syscall.SYS_VM86OLD": "syscall", + "syscall.SYS_VMSPLICE": "syscall", + "syscall.SYS_VM_PRESSURE_MONITOR": "syscall", + "syscall.SYS_VSERVER": "syscall", + "syscall.SYS_WAIT4": "syscall", + "syscall.SYS_WAIT4_NOCANCEL": "syscall", + "syscall.SYS_WAIT6": "syscall", + "syscall.SYS_WAITEVENT": "syscall", + "syscall.SYS_WAITID": "syscall", + "syscall.SYS_WAITID_NOCANCEL": "syscall", + "syscall.SYS_WAITPID": "syscall", + "syscall.SYS_WATCHEVENT": "syscall", + "syscall.SYS_WORKQ_KERNRETURN": "syscall", + "syscall.SYS_WORKQ_OPEN": "syscall", + "syscall.SYS_WRITE": "syscall", + "syscall.SYS_WRITEV": "syscall", + "syscall.SYS_WRITEV_NOCANCEL": "syscall", + "syscall.SYS_WRITE_NOCANCEL": "syscall", + "syscall.SYS_YIELD": "syscall", + "syscall.SYS__LLSEEK": "syscall", + "syscall.SYS__LWP_CONTINUE": "syscall", + "syscall.SYS__LWP_CREATE": "syscall", + "syscall.SYS__LWP_CTL": "syscall", + "syscall.SYS__LWP_DETACH": "syscall", + "syscall.SYS__LWP_EXIT": "syscall", + "syscall.SYS__LWP_GETNAME": "syscall", + "syscall.SYS__LWP_GETPRIVATE": "syscall", + "syscall.SYS__LWP_KILL": "syscall", + "syscall.SYS__LWP_PARK": "syscall", + "syscall.SYS__LWP_SELF": "syscall", + "syscall.SYS__LWP_SETNAME": "syscall", + "syscall.SYS__LWP_SETPRIVATE": "syscall", + "syscall.SYS__LWP_SUSPEND": "syscall", + "syscall.SYS__LWP_UNPARK": "syscall", + "syscall.SYS__LWP_UNPARK_ALL": "syscall", + "syscall.SYS__LWP_WAIT": "syscall", + "syscall.SYS__LWP_WAKEUP": "syscall", + 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"syscall.SYS___THREXIT": "syscall", + "syscall.SYS___THRSIGDIVERT": "syscall", + "syscall.SYS___THRSLEEP": "syscall", + "syscall.SYS___THRWAKEUP": "syscall", + "syscall.S_ARCH1": "syscall", + "syscall.S_ARCH2": "syscall", + "syscall.S_BLKSIZE": "syscall", + "syscall.S_IEXEC": "syscall", + "syscall.S_IFBLK": "syscall", + "syscall.S_IFCHR": "syscall", + "syscall.S_IFDIR": "syscall", + "syscall.S_IFIFO": "syscall", + "syscall.S_IFLNK": "syscall", + "syscall.S_IFMT": "syscall", + "syscall.S_IFREG": "syscall", + "syscall.S_IFSOCK": "syscall", + "syscall.S_IFWHT": "syscall", + "syscall.S_IREAD": "syscall", + "syscall.S_IRGRP": "syscall", + "syscall.S_IROTH": "syscall", + "syscall.S_IRUSR": "syscall", + "syscall.S_IRWXG": "syscall", + "syscall.S_IRWXO": "syscall", + "syscall.S_IRWXU": "syscall", + "syscall.S_ISGID": "syscall", + "syscall.S_ISTXT": "syscall", + "syscall.S_ISUID": "syscall", + "syscall.S_ISVTX": "syscall", + "syscall.S_IWGRP": "syscall", + "syscall.S_IWOTH": "syscall", + 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"syscall", + "syscall.SizeofBpfStat": "syscall", + "syscall.SizeofBpfVersion": "syscall", + "syscall.SizeofBpfZbuf": "syscall", + "syscall.SizeofBpfZbufHeader": "syscall", + "syscall.SizeofCmsghdr": "syscall", + "syscall.SizeofICMPv6Filter": "syscall", + "syscall.SizeofIPMreq": "syscall", + "syscall.SizeofIPMreqn": "syscall", + "syscall.SizeofIPv6MTUInfo": "syscall", + "syscall.SizeofIPv6Mreq": "syscall", + "syscall.SizeofIfAddrmsg": "syscall", + "syscall.SizeofIfAnnounceMsghdr": "syscall", + "syscall.SizeofIfData": "syscall", + "syscall.SizeofIfInfomsg": "syscall", + "syscall.SizeofIfMsghdr": "syscall", + "syscall.SizeofIfaMsghdr": "syscall", + "syscall.SizeofIfmaMsghdr": "syscall", + "syscall.SizeofIfmaMsghdr2": "syscall", + "syscall.SizeofInet4Pktinfo": "syscall", + "syscall.SizeofInet6Pktinfo": "syscall", + "syscall.SizeofInotifyEvent": "syscall", + "syscall.SizeofLinger": "syscall", + "syscall.SizeofMsghdr": "syscall", + "syscall.SizeofNlAttr": "syscall", + "syscall.SizeofNlMsgerr": "syscall", + "syscall.SizeofNlMsghdr": "syscall", + "syscall.SizeofRtAttr": "syscall", + "syscall.SizeofRtGenmsg": "syscall", + "syscall.SizeofRtMetrics": "syscall", + "syscall.SizeofRtMsg": "syscall", + "syscall.SizeofRtMsghdr": "syscall", + "syscall.SizeofRtNexthop": "syscall", + "syscall.SizeofSockFilter": "syscall", + "syscall.SizeofSockFprog": "syscall", + "syscall.SizeofSockaddrAny": "syscall", + "syscall.SizeofSockaddrDatalink": "syscall", + "syscall.SizeofSockaddrInet4": "syscall", + "syscall.SizeofSockaddrInet6": "syscall", + "syscall.SizeofSockaddrLinklayer": "syscall", + "syscall.SizeofSockaddrNetlink": "syscall", + "syscall.SizeofSockaddrUnix": "syscall", + "syscall.SizeofTCPInfo": "syscall", + "syscall.SizeofUcred": "syscall", + "syscall.SlicePtrFromStrings": "syscall", + "syscall.SockFilter": "syscall", + "syscall.SockFprog": "syscall", + "syscall.SockaddrDatalink": "syscall", + "syscall.SockaddrGen": "syscall", + "syscall.SockaddrInet4": "syscall", + "syscall.SockaddrInet6": "syscall", + "syscall.SockaddrLinklayer": "syscall", + "syscall.SockaddrNetlink": "syscall", + "syscall.SockaddrUnix": "syscall", + "syscall.Socket": "syscall", + "syscall.SocketControlMessage": "syscall", + "syscall.SocketDisableIPv6": "syscall", + "syscall.Socketpair": "syscall", + "syscall.Splice": "syscall", + "syscall.StartProcess": "syscall", + "syscall.StartupInfo": "syscall", + "syscall.Stat": "syscall", + "syscall.Stat_t": "syscall", + "syscall.Statfs": "syscall", + "syscall.Statfs_t": "syscall", + "syscall.Stderr": "syscall", + "syscall.Stdin": "syscall", + "syscall.Stdout": "syscall", + "syscall.StringBytePtr": "syscall", + "syscall.StringByteSlice": "syscall", + "syscall.StringSlicePtr": "syscall", + "syscall.StringToSid": "syscall", + "syscall.StringToUTF16": "syscall", + "syscall.StringToUTF16Ptr": "syscall", + "syscall.Symlink": "syscall", + "syscall.Sync": "syscall", + "syscall.SyncFileRange": "syscall", + "syscall.SysProcAttr": 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"syscall.TCP_KEEPINTVL": "syscall", + "syscall.TCP_LINGER2": "syscall", + "syscall.TCP_MAXBURST": "syscall", + "syscall.TCP_MAXHLEN": "syscall", + "syscall.TCP_MAXOLEN": "syscall", + "syscall.TCP_MAXSEG": "syscall", + "syscall.TCP_MAXWIN": "syscall", + "syscall.TCP_MAX_SACK": "syscall", + "syscall.TCP_MAX_WINSHIFT": "syscall", + "syscall.TCP_MD5SIG": "syscall", + "syscall.TCP_MD5SIG_MAXKEYLEN": "syscall", + "syscall.TCP_MINMSS": "syscall", + "syscall.TCP_MINMSSOVERLOAD": "syscall", + "syscall.TCP_MSS": "syscall", + "syscall.TCP_NODELAY": "syscall", + "syscall.TCP_NOOPT": "syscall", + "syscall.TCP_NOPUSH": "syscall", + "syscall.TCP_NSTATES": "syscall", + "syscall.TCP_QUICKACK": "syscall", + "syscall.TCP_RXT_CONNDROPTIME": "syscall", + "syscall.TCP_RXT_FINDROP": "syscall", + "syscall.TCP_SACK_ENABLE": "syscall", + "syscall.TCP_SYNCNT": "syscall", + "syscall.TCP_VENDOR": "syscall", + "syscall.TCP_WINDOW_CLAMP": "syscall", + "syscall.TCSAFLUSH": "syscall", + "syscall.TCSETS": "syscall", + 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"syscall", + "syscall.TIOCSPTLCK": "syscall", + "syscall.TIOCSQSIZE": "syscall", + "syscall.TIOCSRS485": "syscall", + "syscall.TIOCSSERIAL": "syscall", + "syscall.TIOCSSIZE": "syscall", + "syscall.TIOCSSOFTCAR": "syscall", + "syscall.TIOCSTART": "syscall", + "syscall.TIOCSTAT": "syscall", + "syscall.TIOCSTI": "syscall", + "syscall.TIOCSTOP": "syscall", + "syscall.TIOCSTSTAMP": "syscall", + "syscall.TIOCSWINSZ": "syscall", + "syscall.TIOCTIMESTAMP": "syscall", + "syscall.TIOCUCNTL": "syscall", + "syscall.TIOCVHANGUP": "syscall", + "syscall.TIOCXMTFRAME": "syscall", + "syscall.TOKEN_ADJUST_DEFAULT": "syscall", + "syscall.TOKEN_ADJUST_GROUPS": "syscall", + "syscall.TOKEN_ADJUST_PRIVILEGES": "syscall", + "syscall.TOKEN_ALL_ACCESS": "syscall", + "syscall.TOKEN_ASSIGN_PRIMARY": "syscall", + "syscall.TOKEN_DUPLICATE": "syscall", + "syscall.TOKEN_EXECUTE": "syscall", + "syscall.TOKEN_IMPERSONATE": "syscall", + "syscall.TOKEN_QUERY": "syscall", + "syscall.TOKEN_QUERY_SOURCE": "syscall", + "syscall.TOKEN_READ": "syscall", + "syscall.TOKEN_WRITE": "syscall", + "syscall.TOSTOP": "syscall", + "syscall.TRUNCATE_EXISTING": "syscall", + "syscall.TUNATTACHFILTER": "syscall", + "syscall.TUNDETACHFILTER": "syscall", + "syscall.TUNGETFEATURES": "syscall", + "syscall.TUNGETIFF": "syscall", + "syscall.TUNGETSNDBUF": "syscall", + "syscall.TUNGETVNETHDRSZ": "syscall", + "syscall.TUNSETDEBUG": "syscall", + "syscall.TUNSETGROUP": "syscall", + "syscall.TUNSETIFF": "syscall", + "syscall.TUNSETLINK": "syscall", + "syscall.TUNSETNOCSUM": "syscall", + "syscall.TUNSETOFFLOAD": "syscall", + "syscall.TUNSETOWNER": "syscall", + "syscall.TUNSETPERSIST": "syscall", + "syscall.TUNSETSNDBUF": "syscall", + "syscall.TUNSETTXFILTER": "syscall", + "syscall.TUNSETVNETHDRSZ": "syscall", + "syscall.Tee": "syscall", + "syscall.TerminateProcess": "syscall", + "syscall.Termios": "syscall", + "syscall.Tgkill": "syscall", + "syscall.Time": "syscall", + "syscall.Time_t": "syscall", + "syscall.Times": "syscall", + "syscall.Timespec": "syscall", + "syscall.TimespecToNsec": "syscall", + "syscall.Timeval": "syscall", + "syscall.Timeval32": "syscall", + "syscall.TimevalToNsec": "syscall", + "syscall.Timex": "syscall", + "syscall.Timezoneinformation": "syscall", + "syscall.Tms": "syscall", + "syscall.Token": "syscall", + "syscall.TokenAccessInformation": "syscall", + "syscall.TokenAuditPolicy": "syscall", + "syscall.TokenDefaultDacl": "syscall", + "syscall.TokenElevation": "syscall", + "syscall.TokenElevationType": "syscall", + "syscall.TokenGroups": "syscall", + "syscall.TokenGroupsAndPrivileges": "syscall", + "syscall.TokenHasRestrictions": "syscall", + "syscall.TokenImpersonationLevel": "syscall", + "syscall.TokenIntegrityLevel": "syscall", + "syscall.TokenLinkedToken": "syscall", + "syscall.TokenLogonSid": "syscall", + "syscall.TokenMandatoryPolicy": "syscall", + "syscall.TokenOrigin": "syscall", + "syscall.TokenOwner": "syscall", + "syscall.TokenPrimaryGroup": "syscall", + "syscall.TokenPrivileges": "syscall", + "syscall.TokenRestrictedSids": "syscall", + "syscall.TokenSandBoxInert": "syscall", + "syscall.TokenSessionId": "syscall", + "syscall.TokenSessionReference": "syscall", + "syscall.TokenSource": "syscall", + "syscall.TokenStatistics": "syscall", + "syscall.TokenType": "syscall", + "syscall.TokenUIAccess": "syscall", + "syscall.TokenUser": "syscall", + "syscall.TokenVirtualizationAllowed": "syscall", + "syscall.TokenVirtualizationEnabled": "syscall", + "syscall.Tokenprimarygroup": "syscall", + "syscall.Tokenuser": "syscall", + "syscall.TranslateAccountName": "syscall", + "syscall.TranslateName": "syscall", + "syscall.TransmitFile": "syscall", + "syscall.TransmitFileBuffers": "syscall", + "syscall.Truncate": "syscall", + "syscall.USAGE_MATCH_TYPE_AND": "syscall", + "syscall.USAGE_MATCH_TYPE_OR": "syscall", + "syscall.UTF16FromString": "syscall", + "syscall.UTF16PtrFromString": "syscall", + "syscall.UTF16ToString": "syscall", + "syscall.Ucred": "syscall", + "syscall.Umask": "syscall", + "syscall.Uname": "syscall", + "syscall.Undelete": "syscall", + "syscall.UnixCredentials": "syscall", + "syscall.UnixRights": "syscall", + "syscall.Unlink": "syscall", + "syscall.Unlinkat": "syscall", + "syscall.UnmapViewOfFile": "syscall", + "syscall.Unmount": "syscall", + "syscall.Unshare": "syscall", + "syscall.UserInfo10": "syscall", + "syscall.Ustat": "syscall", + "syscall.Ustat_t": "syscall", + "syscall.Utimbuf": "syscall", + "syscall.Utime": "syscall", + "syscall.Utimes": "syscall", + "syscall.UtimesNano": "syscall", + "syscall.Utsname": "syscall", + "syscall.VDISCARD": "syscall", + "syscall.VDSUSP": "syscall", + "syscall.VEOF": "syscall", + "syscall.VEOL": "syscall", + "syscall.VEOL2": "syscall", + "syscall.VERASE": "syscall", + "syscall.VERASE2": "syscall", + "syscall.VINTR": "syscall", + "syscall.VKILL": "syscall", + "syscall.VLNEXT": "syscall", + "syscall.VMIN": "syscall", + "syscall.VQUIT": "syscall", + "syscall.VREPRINT": "syscall", + "syscall.VSTART": "syscall", + "syscall.VSTATUS": "syscall", + "syscall.VSTOP": "syscall", + "syscall.VSUSP": "syscall", + "syscall.VSWTC": "syscall", + "syscall.VT0": "syscall", + "syscall.VT1": "syscall", + "syscall.VTDLY": "syscall", + "syscall.VTIME": "syscall", + "syscall.VWERASE": "syscall", + "syscall.VirtualLock": "syscall", + "syscall.VirtualUnlock": "syscall", + "syscall.WAIT_ABANDONED": "syscall", + "syscall.WAIT_FAILED": "syscall", + "syscall.WAIT_OBJECT_0": "syscall", + "syscall.WAIT_TIMEOUT": "syscall", + "syscall.WALL": "syscall", + "syscall.WALLSIG": "syscall", + "syscall.WALTSIG": "syscall", + "syscall.WCLONE": "syscall", + "syscall.WCONTINUED": "syscall", + "syscall.WCOREFLAG": "syscall", + "syscall.WEXITED": "syscall", + "syscall.WLINUXCLONE": "syscall", + "syscall.WNOHANG": "syscall", + "syscall.WNOTHREAD": "syscall", + "syscall.WNOWAIT": "syscall", + "syscall.WNOZOMBIE": "syscall", + "syscall.WOPTSCHECKED": "syscall", + "syscall.WORDSIZE": "syscall", + "syscall.WSABuf": "syscall", + "syscall.WSACleanup": "syscall", + "syscall.WSADESCRIPTION_LEN": "syscall", + "syscall.WSAData": "syscall", + "syscall.WSAEACCES": "syscall", + "syscall.WSAECONNRESET": "syscall", + "syscall.WSAEnumProtocols": "syscall", + "syscall.WSAID_CONNECTEX": "syscall", + "syscall.WSAIoctl": "syscall", + "syscall.WSAPROTOCOL_LEN": "syscall", + "syscall.WSAProtocolChain": "syscall", + "syscall.WSAProtocolInfo": "syscall", + "syscall.WSARecv": "syscall", + "syscall.WSARecvFrom": "syscall", + "syscall.WSASYS_STATUS_LEN": "syscall", + "syscall.WSASend": "syscall", + "syscall.WSASendTo": "syscall", + "syscall.WSASendto": "syscall", + "syscall.WSAStartup": "syscall", + "syscall.WSTOPPED": "syscall", + "syscall.WTRAPPED": "syscall", + "syscall.WUNTRACED": "syscall", + "syscall.Wait4": "syscall", + "syscall.WaitForSingleObject": "syscall", + "syscall.WaitStatus": "syscall", + "syscall.Win32FileAttributeData": "syscall", + "syscall.Win32finddata": "syscall", + "syscall.Write": "syscall", + "syscall.WriteConsole": "syscall", + "syscall.WriteFile": "syscall", + "syscall.X509_ASN_ENCODING": "syscall", + "syscall.XCASE": "syscall", + "syscall.XP1_CONNECTIONLESS": "syscall", + "syscall.XP1_CONNECT_DATA": "syscall", + "syscall.XP1_DISCONNECT_DATA": "syscall", + "syscall.XP1_EXPEDITED_DATA": "syscall", + "syscall.XP1_GRACEFUL_CLOSE": "syscall", + "syscall.XP1_GUARANTEED_DELIVERY": "syscall", + "syscall.XP1_GUARANTEED_ORDER": "syscall", + "syscall.XP1_IFS_HANDLES": "syscall", + "syscall.XP1_MESSAGE_ORIENTED": "syscall", + "syscall.XP1_MULTIPOINT_CONTROL_PLANE": "syscall", + "syscall.XP1_MULTIPOINT_DATA_PLANE": "syscall", + "syscall.XP1_PARTIAL_MESSAGE": "syscall", + "syscall.XP1_PSEUDO_STREAM": "syscall", + "syscall.XP1_QOS_SUPPORTED": "syscall", + "syscall.XP1_SAN_SUPPORT_SDP": "syscall", + "syscall.XP1_SUPPORT_BROADCAST": "syscall", + "syscall.XP1_SUPPORT_MULTIPOINT": "syscall", + "syscall.XP1_UNI_RECV": "syscall", + "syscall.XP1_UNI_SEND": "syscall", + "syslog.Dial": "log/syslog", + "syslog.LOG_ALERT": "log/syslog", + "syslog.LOG_AUTH": "log/syslog", + "syslog.LOG_AUTHPRIV": "log/syslog", + "syslog.LOG_CRIT": "log/syslog", + "syslog.LOG_CRON": "log/syslog", + "syslog.LOG_DAEMON": "log/syslog", + "syslog.LOG_DEBUG": "log/syslog", + "syslog.LOG_EMERG": "log/syslog", + "syslog.LOG_ERR": "log/syslog", + "syslog.LOG_FTP": "log/syslog", + "syslog.LOG_INFO": "log/syslog", + "syslog.LOG_KERN": "log/syslog", + "syslog.LOG_LOCAL0": "log/syslog", + "syslog.LOG_LOCAL1": "log/syslog", + "syslog.LOG_LOCAL2": "log/syslog", + "syslog.LOG_LOCAL3": "log/syslog", + "syslog.LOG_LOCAL4": "log/syslog", + "syslog.LOG_LOCAL5": "log/syslog", + "syslog.LOG_LOCAL6": "log/syslog", + "syslog.LOG_LOCAL7": "log/syslog", + "syslog.LOG_LPR": "log/syslog", + "syslog.LOG_MAIL": "log/syslog", + "syslog.LOG_NEWS": "log/syslog", + "syslog.LOG_NOTICE": "log/syslog", + "syslog.LOG_SYSLOG": "log/syslog", + "syslog.LOG_USER": "log/syslog", + "syslog.LOG_UUCP": "log/syslog", + "syslog.LOG_WARNING": "log/syslog", + "syslog.New": "log/syslog", + "syslog.NewLogger": "log/syslog", + "syslog.Priority": "log/syslog", + "syslog.Writer": "log/syslog", + "tabwriter.AlignRight": "text/tabwriter", + "tabwriter.Debug": "text/tabwriter", + "tabwriter.DiscardEmptyColumns": "text/tabwriter", + "tabwriter.Escape": "text/tabwriter", + "tabwriter.FilterHTML": "text/tabwriter", + "tabwriter.NewWriter": "text/tabwriter", + "tabwriter.StripEscape": "text/tabwriter", + "tabwriter.TabIndent": "text/tabwriter", + "tabwriter.Writer": "text/tabwriter", + "tar.ErrFieldTooLong": "archive/tar", + "tar.ErrHeader": "archive/tar", + "tar.ErrWriteAfterClose": "archive/tar", + "tar.ErrWriteTooLong": "archive/tar", + "tar.FileInfoHeader": "archive/tar", + "tar.Header": "archive/tar", + "tar.NewReader": "archive/tar", + "tar.NewWriter": "archive/tar", + "tar.Reader": "archive/tar", + "tar.TypeBlock": "archive/tar", + "tar.TypeChar": "archive/tar", + "tar.TypeCont": "archive/tar", + "tar.TypeDir": "archive/tar", + "tar.TypeFifo": "archive/tar", + "tar.TypeGNULongLink": "archive/tar", + "tar.TypeGNULongName": "archive/tar", + "tar.TypeGNUSparse": "archive/tar", + "tar.TypeLink": "archive/tar", + "tar.TypeReg": "archive/tar", + "tar.TypeRegA": "archive/tar", + "tar.TypeSymlink": "archive/tar", + "tar.TypeXGlobalHeader": "archive/tar", + "tar.TypeXHeader": "archive/tar", + "tar.Writer": "archive/tar", + "template.CSS": "html/template", + "template.ErrAmbigContext": "html/template", + "template.ErrBadHTML": "html/template", + "template.ErrBranchEnd": "html/template", + "template.ErrEndContext": "html/template", + "template.ErrNoSuchTemplate": "html/template", + "template.ErrOutputContext": "html/template", + "template.ErrPartialCharset": "html/template", + "template.ErrPartialEscape": "html/template", + "template.ErrRangeLoopReentry": "html/template", + "template.ErrSlashAmbig": "html/template", + "template.Error": "html/template", + "template.ErrorCode": "html/template", + // "template.FuncMap" is ambiguous + "template.HTML": "html/template", + "template.HTMLAttr": "html/template", + // "template.HTMLEscape" is ambiguous + // "template.HTMLEscapeString" is ambiguous + // "template.HTMLEscaper" is ambiguous + "template.JS": "html/template", + // "template.JSEscape" is ambiguous + // "template.JSEscapeString" is ambiguous + // "template.JSEscaper" is ambiguous + "template.JSStr": "html/template", + // "template.Must" is ambiguous + // "template.New" is ambiguous + "template.OK": "html/template", + // "template.ParseFiles" is ambiguous + // "template.ParseGlob" is ambiguous + // "template.Template" is ambiguous + "template.URL": "html/template", + // "template.URLQueryEscaper" is ambiguous + "testing.AllocsPerRun": "testing", + "testing.B": "testing", + "testing.Benchmark": "testing", + "testing.BenchmarkResult": "testing", + "testing.Cover": "testing", + "testing.CoverBlock": "testing", + "testing.InternalBenchmark": "testing", + "testing.InternalExample": "testing", + "testing.InternalTest": "testing", + "testing.Main": "testing", + "testing.PB": "testing", + "testing.RegisterCover": "testing", + "testing.RunBenchmarks": "testing", + "testing.RunExamples": "testing", + "testing.RunTests": "testing", + "testing.Short": "testing", + "testing.T": "testing", + "testing.Verbose": "testing", + "textproto.CanonicalMIMEHeaderKey": "net/textproto", + "textproto.Conn": "net/textproto", + "textproto.Dial": "net/textproto", + "textproto.Error": "net/textproto", + "textproto.MIMEHeader": "net/textproto", + "textproto.NewConn": "net/textproto", + "textproto.NewReader": "net/textproto", + "textproto.NewWriter": "net/textproto", + "textproto.Pipeline": "net/textproto", + "textproto.ProtocolError": "net/textproto", + "textproto.Reader": "net/textproto", + "textproto.TrimBytes": "net/textproto", + "textproto.TrimString": "net/textproto", + "textproto.Writer": "net/textproto", + "time.ANSIC": "time", + "time.After": "time", + "time.AfterFunc": "time", + "time.April": "time", + "time.August": "time", + "time.Date": "time", + "time.December": "time", + "time.Duration": "time", + "time.February": "time", + "time.FixedZone": "time", + "time.Friday": "time", + "time.Hour": "time", + "time.January": "time", + "time.July": "time", + "time.June": "time", + "time.Kitchen": "time", + "time.LoadLocation": "time", + "time.Local": "time", + "time.Location": "time", + "time.March": "time", + "time.May": "time", + "time.Microsecond": "time", + "time.Millisecond": "time", + "time.Minute": "time", + "time.Monday": "time", + "time.Month": "time", + "time.Nanosecond": "time", + "time.NewTicker": "time", + "time.NewTimer": "time", + "time.November": "time", + "time.Now": "time", + "time.October": "time", + "time.Parse": "time", + "time.ParseDuration": "time", + "time.ParseError": "time", + "time.ParseInLocation": "time", + "time.RFC1123": "time", + "time.RFC1123Z": "time", + "time.RFC3339": "time", + "time.RFC3339Nano": "time", + "time.RFC822": "time", + "time.RFC822Z": "time", + "time.RFC850": "time", + "time.RubyDate": "time", + "time.Saturday": "time", + "time.Second": "time", + "time.September": "time", + "time.Since": "time", + "time.Sleep": "time", + "time.Stamp": "time", + "time.StampMicro": "time", + "time.StampMilli": "time", + "time.StampNano": "time", + "time.Sunday": "time", + "time.Thursday": "time", + "time.Tick": "time", + "time.Ticker": "time", + "time.Time": "time", + "time.Timer": "time", + "time.Tuesday": "time", + "time.UTC": "time", + "time.Unix": "time", + "time.UnixDate": "time", + "time.Wednesday": "time", + "time.Weekday": "time", + "tls.Certificate": "crypto/tls", + "tls.Client": "crypto/tls", + "tls.ClientAuthType": "crypto/tls", + "tls.ClientSessionCache": "crypto/tls", + "tls.ClientSessionState": "crypto/tls", + "tls.Config": "crypto/tls", + "tls.Conn": "crypto/tls", + "tls.ConnectionState": "crypto/tls", + "tls.CurveID": "crypto/tls", + "tls.CurveP256": "crypto/tls", + "tls.CurveP384": "crypto/tls", + "tls.CurveP521": "crypto/tls", + "tls.Dial": "crypto/tls", + "tls.DialWithDialer": "crypto/tls", + "tls.Listen": "crypto/tls", + "tls.LoadX509KeyPair": "crypto/tls", + "tls.NewLRUClientSessionCache": "crypto/tls", + "tls.NewListener": "crypto/tls", + "tls.NoClientCert": "crypto/tls", + "tls.RequestClientCert": "crypto/tls", + "tls.RequireAndVerifyClientCert": "crypto/tls", + "tls.RequireAnyClientCert": "crypto/tls", + "tls.Server": "crypto/tls", + "tls.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA": "crypto/tls", + "tls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256": "crypto/tls", + "tls.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA": "crypto/tls", + "tls.TLS_ECDHE_ECDSA_WITH_RC4_128_SHA": "crypto/tls", + "tls.TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA": "crypto/tls", + "tls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA": "crypto/tls", + "tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256": "crypto/tls", + "tls.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA": "crypto/tls", + "tls.TLS_ECDHE_RSA_WITH_RC4_128_SHA": "crypto/tls", + "tls.TLS_RSA_WITH_3DES_EDE_CBC_SHA": "crypto/tls", + "tls.TLS_RSA_WITH_AES_128_CBC_SHA": "crypto/tls", + "tls.TLS_RSA_WITH_AES_256_CBC_SHA": "crypto/tls", + "tls.TLS_RSA_WITH_RC4_128_SHA": "crypto/tls", + "tls.VerifyClientCertIfGiven": "crypto/tls", + "tls.VersionSSL30": "crypto/tls", + "tls.VersionTLS10": "crypto/tls", + "tls.VersionTLS11": "crypto/tls", + "tls.VersionTLS12": "crypto/tls", + "tls.X509KeyPair": "crypto/tls", + "token.ADD": "go/token", + "token.ADD_ASSIGN": "go/token", + "token.AND": "go/token", + "token.AND_ASSIGN": "go/token", + "token.AND_NOT": "go/token", + "token.AND_NOT_ASSIGN": "go/token", + "token.ARROW": "go/token", + "token.ASSIGN": "go/token", + "token.BREAK": "go/token", + "token.CASE": "go/token", + "token.CHAN": "go/token", + "token.CHAR": "go/token", + "token.COLON": "go/token", + "token.COMMA": "go/token", + "token.COMMENT": "go/token", + "token.CONST": "go/token", + "token.CONTINUE": "go/token", + "token.DEC": "go/token", + "token.DEFAULT": "go/token", + "token.DEFER": "go/token", + "token.DEFINE": "go/token", + "token.ELLIPSIS": "go/token", + "token.ELSE": "go/token", + "token.EOF": "go/token", + "token.EQL": "go/token", + "token.FALLTHROUGH": "go/token", + "token.FLOAT": "go/token", + "token.FOR": "go/token", + "token.FUNC": "go/token", + "token.File": "go/token", + "token.FileSet": "go/token", + "token.GEQ": "go/token", + "token.GO": "go/token", + "token.GOTO": "go/token", + "token.GTR": "go/token", + "token.HighestPrec": "go/token", + "token.IDENT": "go/token", + "token.IF": "go/token", + "token.ILLEGAL": "go/token", + "token.IMAG": "go/token", + "token.IMPORT": "go/token", + "token.INC": "go/token", + "token.INT": "go/token", + "token.INTERFACE": "go/token", + "token.LAND": "go/token", + "token.LBRACE": "go/token", + "token.LBRACK": "go/token", + "token.LEQ": "go/token", + "token.LOR": "go/token", + "token.LPAREN": "go/token", + "token.LSS": "go/token", + "token.Lookup": "go/token", + "token.LowestPrec": "go/token", + "token.MAP": "go/token", + "token.MUL": "go/token", + "token.MUL_ASSIGN": "go/token", + "token.NEQ": "go/token", + "token.NOT": "go/token", + "token.NewFileSet": "go/token", + "token.NoPos": "go/token", + "token.OR": "go/token", + "token.OR_ASSIGN": "go/token", + "token.PACKAGE": "go/token", + "token.PERIOD": "go/token", + "token.Pos": "go/token", + "token.Position": "go/token", + "token.QUO": "go/token", + "token.QUO_ASSIGN": "go/token", + "token.RANGE": "go/token", + "token.RBRACE": "go/token", + "token.RBRACK": "go/token", + "token.REM": "go/token", + "token.REM_ASSIGN": "go/token", + "token.RETURN": "go/token", + "token.RPAREN": "go/token", + "token.SELECT": "go/token", + "token.SEMICOLON": "go/token", + "token.SHL": "go/token", + "token.SHL_ASSIGN": "go/token", + "token.SHR": "go/token", + "token.SHR_ASSIGN": "go/token", + "token.STRING": "go/token", + "token.STRUCT": "go/token", + "token.SUB": "go/token", + "token.SUB_ASSIGN": "go/token", + "token.SWITCH": "go/token", + "token.TYPE": "go/token", + "token.Token": "go/token", + "token.UnaryPrec": "go/token", + "token.VAR": "go/token", + "token.XOR": "go/token", + "token.XOR_ASSIGN": "go/token", + "unicode.ASCII_Hex_Digit": "unicode", + "unicode.Arabic": "unicode", + "unicode.Armenian": "unicode", + "unicode.Avestan": "unicode", + "unicode.AzeriCase": "unicode", + "unicode.Balinese": "unicode", + "unicode.Bamum": "unicode", + "unicode.Batak": "unicode", + "unicode.Bengali": "unicode", + "unicode.Bidi_Control": "unicode", + "unicode.Bopomofo": "unicode", + "unicode.Brahmi": "unicode", + "unicode.Braille": "unicode", + "unicode.Buginese": "unicode", + "unicode.Buhid": "unicode", + "unicode.C": "unicode", + "unicode.Canadian_Aboriginal": "unicode", + "unicode.Carian": "unicode", + "unicode.CaseRange": "unicode", + "unicode.CaseRanges": "unicode", + "unicode.Categories": "unicode", + "unicode.Cc": "unicode", + "unicode.Cf": "unicode", + "unicode.Chakma": "unicode", + "unicode.Cham": "unicode", + "unicode.Cherokee": "unicode", + "unicode.Co": "unicode", + "unicode.Common": "unicode", + "unicode.Coptic": "unicode", + "unicode.Cs": "unicode", + "unicode.Cuneiform": "unicode", + "unicode.Cypriot": "unicode", + "unicode.Cyrillic": "unicode", + "unicode.Dash": "unicode", + "unicode.Deprecated": "unicode", + "unicode.Deseret": "unicode", + "unicode.Devanagari": "unicode", + "unicode.Diacritic": "unicode", + "unicode.Digit": "unicode", + "unicode.Egyptian_Hieroglyphs": "unicode", + "unicode.Ethiopic": "unicode", + "unicode.Extender": "unicode", + "unicode.FoldCategory": "unicode", + "unicode.FoldScript": "unicode", + "unicode.Georgian": "unicode", + "unicode.Glagolitic": "unicode", + "unicode.Gothic": "unicode", + "unicode.GraphicRanges": "unicode", + "unicode.Greek": "unicode", + "unicode.Gujarati": "unicode", + "unicode.Gurmukhi": "unicode", + "unicode.Han": "unicode", + "unicode.Hangul": "unicode", + "unicode.Hanunoo": "unicode", + "unicode.Hebrew": "unicode", + "unicode.Hex_Digit": "unicode", + "unicode.Hiragana": "unicode", + "unicode.Hyphen": "unicode", + "unicode.IDS_Binary_Operator": "unicode", + "unicode.IDS_Trinary_Operator": "unicode", + "unicode.Ideographic": "unicode", + "unicode.Imperial_Aramaic": "unicode", + "unicode.In": "unicode", + "unicode.Inherited": "unicode", + "unicode.Inscriptional_Pahlavi": "unicode", + "unicode.Inscriptional_Parthian": "unicode", + "unicode.Is": "unicode", + "unicode.IsControl": "unicode", + "unicode.IsDigit": "unicode", + "unicode.IsGraphic": "unicode", + "unicode.IsLetter": "unicode", + "unicode.IsLower": "unicode", + "unicode.IsMark": "unicode", + "unicode.IsNumber": "unicode", + "unicode.IsOneOf": "unicode", + "unicode.IsPrint": "unicode", + "unicode.IsPunct": "unicode", + "unicode.IsSpace": "unicode", + "unicode.IsSymbol": "unicode", + "unicode.IsTitle": "unicode", + "unicode.IsUpper": "unicode", + "unicode.Javanese": "unicode", + "unicode.Join_Control": "unicode", + "unicode.Kaithi": "unicode", + "unicode.Kannada": "unicode", + "unicode.Katakana": "unicode", + "unicode.Kayah_Li": "unicode", + "unicode.Kharoshthi": "unicode", + "unicode.Khmer": "unicode", + "unicode.L": "unicode", + "unicode.Lao": "unicode", + "unicode.Latin": "unicode", + "unicode.Lepcha": "unicode", + "unicode.Letter": "unicode", + "unicode.Limbu": "unicode", + "unicode.Linear_B": "unicode", + "unicode.Lisu": "unicode", + "unicode.Ll": "unicode", + "unicode.Lm": "unicode", + "unicode.Lo": "unicode", + "unicode.Logical_Order_Exception": "unicode", + "unicode.Lower": "unicode", + "unicode.LowerCase": "unicode", + "unicode.Lt": "unicode", + "unicode.Lu": "unicode", + "unicode.Lycian": "unicode", + "unicode.Lydian": "unicode", + "unicode.M": "unicode", + "unicode.Malayalam": "unicode", + "unicode.Mandaic": "unicode", + "unicode.Mark": "unicode", + "unicode.MaxASCII": "unicode", + "unicode.MaxCase": "unicode", + "unicode.MaxLatin1": "unicode", + "unicode.MaxRune": "unicode", + "unicode.Mc": "unicode", + "unicode.Me": "unicode", + "unicode.Meetei_Mayek": "unicode", + "unicode.Meroitic_Cursive": "unicode", + "unicode.Meroitic_Hieroglyphs": "unicode", + "unicode.Miao": "unicode", + "unicode.Mn": "unicode", + "unicode.Mongolian": "unicode", + "unicode.Myanmar": "unicode", + "unicode.N": "unicode", + "unicode.Nd": "unicode", + "unicode.New_Tai_Lue": "unicode", + "unicode.Nko": "unicode", + "unicode.Nl": "unicode", + "unicode.No": "unicode", + "unicode.Noncharacter_Code_Point": "unicode", + "unicode.Number": "unicode", + "unicode.Ogham": "unicode", + "unicode.Ol_Chiki": "unicode", + "unicode.Old_Italic": "unicode", + "unicode.Old_Persian": "unicode", + "unicode.Old_South_Arabian": "unicode", + "unicode.Old_Turkic": "unicode", + "unicode.Oriya": "unicode", + "unicode.Osmanya": "unicode", + "unicode.Other": "unicode", + "unicode.Other_Alphabetic": "unicode", + "unicode.Other_Default_Ignorable_Code_Point": "unicode", + "unicode.Other_Grapheme_Extend": "unicode", + "unicode.Other_ID_Continue": "unicode", + "unicode.Other_ID_Start": "unicode", + "unicode.Other_Lowercase": "unicode", + "unicode.Other_Math": "unicode", + "unicode.Other_Uppercase": "unicode", + "unicode.P": "unicode", + "unicode.Pattern_Syntax": "unicode", + "unicode.Pattern_White_Space": "unicode", + "unicode.Pc": "unicode", + "unicode.Pd": "unicode", + "unicode.Pe": "unicode", + "unicode.Pf": "unicode", + "unicode.Phags_Pa": "unicode", + "unicode.Phoenician": "unicode", + "unicode.Pi": "unicode", + "unicode.Po": "unicode", + "unicode.PrintRanges": "unicode", + "unicode.Properties": "unicode", + "unicode.Ps": "unicode", + "unicode.Punct": "unicode", + "unicode.Quotation_Mark": "unicode", + "unicode.Radical": "unicode", + "unicode.Range16": "unicode", + "unicode.Range32": "unicode", + "unicode.RangeTable": "unicode", + "unicode.Rejang": "unicode", + "unicode.ReplacementChar": "unicode", + "unicode.Runic": "unicode", + "unicode.S": "unicode", + "unicode.STerm": "unicode", + "unicode.Samaritan": "unicode", + "unicode.Saurashtra": "unicode", + "unicode.Sc": "unicode", + "unicode.Scripts": "unicode", + "unicode.Sharada": "unicode", + "unicode.Shavian": "unicode", + "unicode.SimpleFold": "unicode", + "unicode.Sinhala": "unicode", + "unicode.Sk": "unicode", + "unicode.Sm": "unicode", + "unicode.So": "unicode", + "unicode.Soft_Dotted": "unicode", + "unicode.Sora_Sompeng": "unicode", + "unicode.Space": "unicode", + "unicode.SpecialCase": "unicode", + "unicode.Sundanese": "unicode", + "unicode.Syloti_Nagri": "unicode", + "unicode.Symbol": "unicode", + "unicode.Syriac": "unicode", + "unicode.Tagalog": "unicode", + "unicode.Tagbanwa": "unicode", + "unicode.Tai_Le": "unicode", + "unicode.Tai_Tham": "unicode", + "unicode.Tai_Viet": "unicode", + "unicode.Takri": "unicode", + "unicode.Tamil": "unicode", + "unicode.Telugu": "unicode", + "unicode.Terminal_Punctuation": "unicode", + "unicode.Thaana": "unicode", + "unicode.Thai": "unicode", + "unicode.Tibetan": "unicode", + "unicode.Tifinagh": "unicode", + "unicode.Title": "unicode", + "unicode.TitleCase": "unicode", + "unicode.To": "unicode", + "unicode.ToLower": "unicode", + "unicode.ToTitle": "unicode", + "unicode.ToUpper": "unicode", + "unicode.TurkishCase": "unicode", + "unicode.Ugaritic": "unicode", + "unicode.Unified_Ideograph": "unicode", + "unicode.Upper": "unicode", + "unicode.UpperCase": "unicode", + "unicode.UpperLower": "unicode", + "unicode.Vai": "unicode", + "unicode.Variation_Selector": "unicode", + "unicode.Version": "unicode", + "unicode.White_Space": "unicode", + "unicode.Yi": "unicode", + "unicode.Z": "unicode", + "unicode.Zl": "unicode", + "unicode.Zp": "unicode", + "unicode.Zs": "unicode", + "url.Error": "net/url", + "url.EscapeError": "net/url", + "url.Parse": "net/url", + "url.ParseQuery": "net/url", + "url.ParseRequestURI": "net/url", + "url.QueryEscape": "net/url", + "url.QueryUnescape": "net/url", + "url.URL": "net/url", + "url.User": "net/url", + "url.UserPassword": "net/url", + "url.Userinfo": "net/url", + "url.Values": "net/url", + "user.Current": "os/user", + "user.Lookup": "os/user", + "user.LookupId": "os/user", + "user.UnknownUserError": "os/user", + "user.UnknownUserIdError": "os/user", + "user.User": "os/user", + "utf16.Decode": "unicode/utf16", + "utf16.DecodeRune": "unicode/utf16", + "utf16.Encode": "unicode/utf16", + "utf16.EncodeRune": "unicode/utf16", + "utf16.IsSurrogate": "unicode/utf16", + "utf8.DecodeLastRune": "unicode/utf8", + "utf8.DecodeLastRuneInString": "unicode/utf8", + "utf8.DecodeRune": "unicode/utf8", + "utf8.DecodeRuneInString": "unicode/utf8", + "utf8.EncodeRune": "unicode/utf8", + "utf8.FullRune": "unicode/utf8", + "utf8.FullRuneInString": "unicode/utf8", + "utf8.MaxRune": "unicode/utf8", + "utf8.RuneCount": "unicode/utf8", + "utf8.RuneCountInString": "unicode/utf8", + "utf8.RuneError": "unicode/utf8", + "utf8.RuneLen": "unicode/utf8", + "utf8.RuneSelf": "unicode/utf8", + "utf8.RuneStart": "unicode/utf8", + "utf8.UTFMax": "unicode/utf8", + "utf8.Valid": "unicode/utf8", + "utf8.ValidRune": "unicode/utf8", + "utf8.ValidString": "unicode/utf8", + "x509.CANotAuthorizedForThisName": "crypto/x509", + "x509.CertPool": "crypto/x509", + "x509.Certificate": "crypto/x509", + "x509.CertificateInvalidError": "crypto/x509", + "x509.CertificateRequest": "crypto/x509", + "x509.ConstraintViolationError": "crypto/x509", + "x509.CreateCertificate": "crypto/x509", + "x509.CreateCertificateRequest": "crypto/x509", + "x509.DSA": "crypto/x509", + "x509.DSAWithSHA1": "crypto/x509", + "x509.DSAWithSHA256": "crypto/x509", + "x509.DecryptPEMBlock": "crypto/x509", + "x509.ECDSA": "crypto/x509", + "x509.ECDSAWithSHA1": "crypto/x509", + "x509.ECDSAWithSHA256": "crypto/x509", + "x509.ECDSAWithSHA384": "crypto/x509", + "x509.ECDSAWithSHA512": "crypto/x509", + "x509.EncryptPEMBlock": "crypto/x509", + "x509.ErrUnsupportedAlgorithm": "crypto/x509", + "x509.Expired": "crypto/x509", + "x509.ExtKeyUsage": "crypto/x509", + "x509.ExtKeyUsageAny": "crypto/x509", + "x509.ExtKeyUsageClientAuth": "crypto/x509", + "x509.ExtKeyUsageCodeSigning": "crypto/x509", + "x509.ExtKeyUsageEmailProtection": "crypto/x509", + "x509.ExtKeyUsageIPSECEndSystem": "crypto/x509", + "x509.ExtKeyUsageIPSECTunnel": "crypto/x509", + "x509.ExtKeyUsageIPSECUser": "crypto/x509", + "x509.ExtKeyUsageMicrosoftServerGatedCrypto": "crypto/x509", + "x509.ExtKeyUsageNetscapeServerGatedCrypto": "crypto/x509", + "x509.ExtKeyUsageOCSPSigning": "crypto/x509", + "x509.ExtKeyUsageServerAuth": "crypto/x509", + "x509.ExtKeyUsageTimeStamping": "crypto/x509", + "x509.HostnameError": "crypto/x509", + "x509.IncompatibleUsage": "crypto/x509", + "x509.IncorrectPasswordError": "crypto/x509", + "x509.InvalidReason": "crypto/x509", + "x509.IsEncryptedPEMBlock": "crypto/x509", + "x509.KeyUsage": "crypto/x509", + "x509.KeyUsageCRLSign": "crypto/x509", + "x509.KeyUsageCertSign": "crypto/x509", + "x509.KeyUsageContentCommitment": "crypto/x509", + "x509.KeyUsageDataEncipherment": "crypto/x509", + "x509.KeyUsageDecipherOnly": "crypto/x509", + "x509.KeyUsageDigitalSignature": "crypto/x509", + "x509.KeyUsageEncipherOnly": "crypto/x509", + "x509.KeyUsageKeyAgreement": "crypto/x509", + "x509.KeyUsageKeyEncipherment": "crypto/x509", + "x509.MD2WithRSA": "crypto/x509", + "x509.MD5WithRSA": "crypto/x509", + "x509.MarshalECPrivateKey": "crypto/x509", + "x509.MarshalPKCS1PrivateKey": "crypto/x509", + "x509.MarshalPKIXPublicKey": "crypto/x509", + "x509.NewCertPool": "crypto/x509", + "x509.NotAuthorizedToSign": "crypto/x509", + "x509.PEMCipher": "crypto/x509", + "x509.PEMCipher3DES": "crypto/x509", + "x509.PEMCipherAES128": "crypto/x509", + "x509.PEMCipherAES192": "crypto/x509", + "x509.PEMCipherAES256": "crypto/x509", + "x509.PEMCipherDES": "crypto/x509", + "x509.ParseCRL": "crypto/x509", + "x509.ParseCertificate": "crypto/x509", + "x509.ParseCertificateRequest": "crypto/x509", + "x509.ParseCertificates": "crypto/x509", + "x509.ParseDERCRL": "crypto/x509", + "x509.ParseECPrivateKey": "crypto/x509", + "x509.ParsePKCS1PrivateKey": "crypto/x509", + "x509.ParsePKCS8PrivateKey": "crypto/x509", + "x509.ParsePKIXPublicKey": "crypto/x509", + "x509.PublicKeyAlgorithm": "crypto/x509", + "x509.RSA": "crypto/x509", + "x509.SHA1WithRSA": "crypto/x509", + "x509.SHA256WithRSA": "crypto/x509", + "x509.SHA384WithRSA": "crypto/x509", + "x509.SHA512WithRSA": "crypto/x509", + "x509.SignatureAlgorithm": "crypto/x509", + "x509.SystemRootsError": "crypto/x509", + "x509.TooManyIntermediates": "crypto/x509", + "x509.UnhandledCriticalExtension": "crypto/x509", + "x509.UnknownAuthorityError": "crypto/x509", + "x509.UnknownPublicKeyAlgorithm": "crypto/x509", + "x509.UnknownSignatureAlgorithm": "crypto/x509", + "x509.VerifyOptions": "crypto/x509", + "xml.Attr": "encoding/xml", + "xml.CharData": "encoding/xml", + "xml.Comment": "encoding/xml", + "xml.CopyToken": "encoding/xml", + "xml.Decoder": "encoding/xml", + "xml.Directive": "encoding/xml", + "xml.Encoder": "encoding/xml", + "xml.EndElement": "encoding/xml", + "xml.Escape": "encoding/xml", + "xml.EscapeText": "encoding/xml", + "xml.HTMLAutoClose": "encoding/xml", + "xml.HTMLEntity": "encoding/xml", + "xml.Header": "encoding/xml", + "xml.Marshal": "encoding/xml", + "xml.MarshalIndent": "encoding/xml", + "xml.Marshaler": "encoding/xml", + "xml.MarshalerAttr": "encoding/xml", + "xml.Name": "encoding/xml", + "xml.NewDecoder": "encoding/xml", + "xml.NewEncoder": "encoding/xml", + "xml.ProcInst": "encoding/xml", + "xml.StartElement": "encoding/xml", + "xml.SyntaxError": "encoding/xml", + "xml.TagPathError": "encoding/xml", + "xml.Token": "encoding/xml", + "xml.Unmarshal": "encoding/xml", + "xml.UnmarshalError": "encoding/xml", + "xml.Unmarshaler": "encoding/xml", + "xml.UnmarshalerAttr": "encoding/xml", + "xml.UnsupportedTypeError": "encoding/xml", + "zip.Compressor": "archive/zip", + "zip.Decompressor": "archive/zip", + "zip.Deflate": "archive/zip", + "zip.ErrAlgorithm": "archive/zip", + "zip.ErrChecksum": "archive/zip", + "zip.ErrFormat": "archive/zip", + "zip.File": "archive/zip", + "zip.FileHeader": "archive/zip", + "zip.FileInfoHeader": "archive/zip", + "zip.NewReader": "archive/zip", + "zip.NewWriter": "archive/zip", + "zip.OpenReader": "archive/zip", + "zip.ReadCloser": "archive/zip", + "zip.Reader": "archive/zip", + "zip.RegisterCompressor": "archive/zip", + "zip.RegisterDecompressor": "archive/zip", + "zip.Store": "archive/zip", + "zip.Writer": "archive/zip", + "zlib.BestCompression": "compress/zlib", + "zlib.BestSpeed": "compress/zlib", + "zlib.DefaultCompression": "compress/zlib", + "zlib.ErrChecksum": "compress/zlib", + "zlib.ErrDictionary": "compress/zlib", + "zlib.ErrHeader": "compress/zlib", + "zlib.NewReader": "compress/zlib", + "zlib.NewReaderDict": "compress/zlib", + "zlib.NewWriter": "compress/zlib", + "zlib.NewWriterLevel": "compress/zlib", + "zlib.NewWriterLevelDict": "compress/zlib", + "zlib.NoCompression": "compress/zlib", + "zlib.Writer": "compress/zlib", +} diff --git a/vendor/github.com/visualfc/gotools/types/types.go b/vendor/github.com/visualfc/gotools/types/types.go new file mode 100644 index 0000000..1605adb --- /dev/null +++ b/vendor/github.com/visualfc/gotools/types/types.go @@ -0,0 +1,1064 @@ +// Copyright 2011-2015 visualfc . All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package types + +import ( + "bytes" + "fmt" + "go/ast" + "go/build" + "go/parser" + "go/printer" + "go/token" + "io/ioutil" + "log" + "os" + "path/filepath" + "regexp" + "sort" + "strconv" + "strings" + "time" + + "github.com/visualfc/gotools/command" + "github.com/visualfc/gotools/stdlib" + "golang.org/x/tools/go/buildutil" + "golang.org/x/tools/go/gcimporter" + "golang.org/x/tools/go/types" +) + +var Command = &command.Command{ + Run: runTypes, + UsageLine: "types", + Short: "golang type util", + Long: `golang type util`, +} + +var ( + typesVerbose bool + typesAllowBinary bool + typesFilePos string + typesFileStdin bool + typesFindUse bool + typesFindDef bool + typesFindUseAll bool + typesFindInfo bool + typesFindDoc bool +) + +//func init +func init() { + Command.Flag.BoolVar(&typesVerbose, "v", false, "verbose debugging") + Command.Flag.BoolVar(&typesAllowBinary, "b", false, "import can be satisfied by a compiled package object without corresponding sources.") + Command.Flag.StringVar(&typesFilePos, "pos", "", "file position \"file.go:pos\"") + Command.Flag.BoolVar(&typesFileStdin, "stdin", false, "input file use stdin") + Command.Flag.BoolVar(&typesFindInfo, "info", false, "find cursor info") + Command.Flag.BoolVar(&typesFindDef, "def", false, "find cursor define") + Command.Flag.BoolVar(&typesFindUse, "use", false, "find cursor usages") + Command.Flag.BoolVar(&typesFindUseAll, "all", false, "find cursor all usages in GOPATH") + Command.Flag.BoolVar(&typesFindDoc, "doc", false, "find cursor def doc") +} + +type ObjKind int + +const ( + ObjNone ObjKind = iota + ObjPkgName + ObjTypeName + ObjInterface + ObjStruct + ObjConst + ObjVar + ObjField + ObjFunc + ObjMethod + ObjLabel + ObjBuiltin + ObjNil +) + +var ObjKindName = []string{"none", "package", + "type", "interface", "struct", + "const", "var", "field", + "func", "method", + "label", "builtin", "nil"} + +func (k ObjKind) String() string { + if k >= 0 && int(k) < len(ObjKindName) { + return ObjKindName[k] + } + return "unkwnown" +} + +var builtinInfoMap = map[string]string{ + "append": "func append(slice []Type, elems ...Type) []Type", + "copy": "func copy(dst, src []Type) int", + "delete": "func delete(m map[Type]Type1, key Type)", + "len": "func len(v Type) int", + "cap": "func cap(v Type) int", + "make": "func make(Type, size IntegerType) Type", + "new": "func new(Type) *Type", + "complex": "func complex(r, i FloatType) ComplexType", + "real": "func real(c ComplexType) FloatType", + "imag": "func imag(c ComplexType) FloatType", + "close": "func close(c chan<- Type)", + "panic": "func panic(v interface{})", + "recover": "func recover() interface{}", + "print": "func print(args ...Type)", + "println": "func println(args ...Type)", + "error": "type error interface {Error() string}", +} + +func builtinInfo(id string) string { + if info, ok := builtinInfoMap[id]; ok { + return "builtin " + info + } + return "builtin " + id +} + +func simpleObjInfo(obj types.Object) string { + pkg := obj.Pkg() + s := simpleType(obj.String()) + if pkg != nil && pkg.Name() == "main" { + return strings.Replace(s, simpleType(pkg.Path())+".", "", -1) + } + return s +} + +func simpleType(src string) string { + re, _ := regexp.Compile("[\\w\\./]+") + return re.ReplaceAllStringFunc(src, func(s string) string { + r := s + if i := strings.LastIndex(s, "/"); i != -1 { + r = s[i+1:] + } + if strings.Count(r, ".") > 1 { + r = r[strings.Index(r, ".")+1:] + } + return r + }) +} + +func runTypes(cmd *command.Command, args []string) error { + if len(args) < 1 { + cmd.Usage() + return nil + } + if typesVerbose { + now := time.Now() + defer func() { + log.Println("time", time.Now().Sub(now)) + }() + } + w := NewPkgWalker(&build.Default) + var cursor *FileCursor + if typesFilePos != "" { + var cursorInfo FileCursor + pos := strings.Index(typesFilePos, ":") + if pos != -1 { + cursorInfo.fileName = typesFilePos[:pos] + if i, err := strconv.Atoi(typesFilePos[pos+1:]); err == nil { + cursorInfo.cursorPos = i + } + } + if typesFileStdin { + src, err := ioutil.ReadAll(os.Stdin) + if err == nil { + cursorInfo.src = src + } + } + cursor = &cursorInfo + } + for _, pkgName := range args { + if pkgName == "." { + pkgPath, err := os.Getwd() + if err != nil { + log.Fatalln(err) + } + pkgName = pkgPath + } + conf := &PkgConfig{IgnoreFuncBodies: true, AllowBinary: true, WithTestFiles: true} + if cursor != nil { + conf.Cursor = cursor + conf.IgnoreFuncBodies = false + conf.Info = &types.Info{ + Uses: make(map[*ast.Ident]types.Object), + Defs: make(map[*ast.Ident]types.Object), + Selections: make(map[*ast.SelectorExpr]*types.Selection), + //Types: make(map[ast.Expr]types.TypeAndValue), + //Scopes : make(map[ast.Node]*types.Scope) + //Implicits : make(map[ast.Node]types.Object) + } + conf.XInfo = &types.Info{ + Uses: make(map[*ast.Ident]types.Object), + Defs: make(map[*ast.Ident]types.Object), + Selections: make(map[*ast.SelectorExpr]*types.Selection), + } + } + pkg, err := w.Import("", pkgName, conf) + if pkg == nil { + log.Fatalln("error import path", err) + } + if cursor != nil && (typesFindInfo || typesFindDef || typesFindUse) { + w.LookupCursor(pkg, conf, cursor) + } + } + return nil +} + +type FileCursor struct { + pkg string + fileName string + fileDir string + cursorPos int + pos token.Pos + src interface{} + xtest bool +} + +type PkgConfig struct { + IgnoreFuncBodies bool + AllowBinary bool + WithTestFiles bool + Cursor *FileCursor + Pkg *types.Package + XPkg *types.Package + Info *types.Info + XInfo *types.Info + Files map[string]*ast.File + TestFiles map[string]*ast.File + XTestFiles map[string]*ast.File +} + +func NewPkgWalker(context *build.Context) *PkgWalker { + return &PkgWalker{ + context: context, + fset: token.NewFileSet(), + parsedFileCache: map[string]*ast.File{}, + imported: map[string]*types.Package{"unsafe": types.Unsafe}, + gcimporter: map[string]*types.Package{"unsafe": types.Unsafe}, + } +} + +type PkgWalker struct { + fset *token.FileSet + context *build.Context + current *types.Package + importing types.Package + parsedFileCache map[string]*ast.File + imported map[string]*types.Package // packages already imported + gcimporter map[string]*types.Package +} + +func contains(list []string, s string) bool { + for _, t := range list { + if t == s { + return true + } + } + return false +} + +func (w *PkgWalker) isBinaryPkg(pkg string) bool { + return stdlib.IsStdPkg(pkg) +} + +func (w *PkgWalker) importPath(path string, mode build.ImportMode) (*build.Package, error) { + if filepath.IsAbs(path) { + return w.context.ImportDir(path, 0) + } + if stdlib.IsStdPkg(path) { + return stdlib.ImportStdPkg(w.context, path, mode) + } + return w.context.Import(path, "", mode) +} + +func (w *PkgWalker) Import(parentDir string, name string, conf *PkgConfig) (pkg *types.Package, err error) { + defer func() { + err := recover() + if err != nil && typesVerbose { + log.Println(err) + } + }() + + if strings.HasPrefix(name, ".") && parentDir != "" { + name = filepath.Join(parentDir, name) + } + pkg = w.imported[name] + if pkg != nil { + if pkg == &w.importing { + return nil, fmt.Errorf("cycle importing package %q", name) + } + return pkg, nil + } + + if typesVerbose { + log.Println("parser pkg", name) + } + + bp, err := w.importPath(name, 0) + if err != nil { + return nil, err + } + + checkName := name + + if bp.ImportPath == "." { + checkName = bp.Name + } else { + checkName = bp.ImportPath + } + + if err != nil { + return nil, err + //if _, nogo := err.(*build.NoGoError); nogo { + // return + //} + //return + //log.Fatalf("pkg %q, dir %q: ScanDir: %v", name, info.Dir, err) + } + + filenames := append(append([]string{}, bp.GoFiles...), bp.CgoFiles...) + if conf.WithTestFiles { + filenames = append(filenames, bp.TestGoFiles...) + } + + if name == "runtime" { + n := fmt.Sprintf("zgoos_%s.go", w.context.GOOS) + if !contains(filenames, n) { + filenames = append(filenames, n) + } + + n = fmt.Sprintf("zgoarch_%s.go", w.context.GOARCH) + if !contains(filenames, n) { + filenames = append(filenames, n) + } + } + + parserFiles := func(filenames []string, cursor *FileCursor, xtest bool) (files []*ast.File) { + for _, file := range filenames { + var f *ast.File + if cursor != nil && cursor.fileName == file { + f, err = w.parseFile(bp.Dir, file, cursor.src) + cursor.pos = token.Pos(w.fset.File(f.Pos()).Base()) + token.Pos(cursor.cursorPos) + cursor.fileDir = bp.Dir + cursor.xtest = xtest + } else { + f, err = w.parseFile(bp.Dir, file, nil) + } + if err != nil && typesVerbose { + log.Printf("error parsing package %s: %s\n", name, err) + } + files = append(files, f) + } + return + } + files := parserFiles(filenames, conf.Cursor, false) + xfiles := parserFiles(bp.XTestGoFiles, conf.Cursor, true) + + typesConf := types.Config{ + IgnoreFuncBodies: conf.IgnoreFuncBodies, + FakeImportC: true, + Packages: w.gcimporter, + Import: func(imports map[string]*types.Package, name string) (pkg *types.Package, err error) { + if pkg != nil { + return pkg, nil + } + if conf.AllowBinary && w.isBinaryPkg(name) { + pkg = w.gcimporter[name] + if pkg != nil && pkg.Complete() { + return + } + pkg, err = gcimporter.Import(imports, name) + if pkg != nil && pkg.Complete() { + w.gcimporter[name] = pkg + return + } + } + return w.Import(bp.Dir, name, &PkgConfig{IgnoreFuncBodies: true, AllowBinary: true, WithTestFiles: false}) + }, + Error: func(err error) { + if typesVerbose { + log.Println(err) + } + }, + } + if pkg == nil { + pkg, err = typesConf.Check(checkName, w.fset, files, conf.Info) + conf.Pkg = pkg + } + w.imported[name] = pkg + + if len(xfiles) > 0 { + xpkg, _ := typesConf.Check(checkName+"_test", w.fset, xfiles, conf.XInfo) + w.imported[checkName+"_test"] = xpkg + conf.XPkg = xpkg + } + return +} + +func (w *PkgWalker) parseFile(dir, file string, src interface{}) (*ast.File, error) { + filename := filepath.Join(dir, file) + f, _ := w.parsedFileCache[filename] + if f != nil { + return f, nil + } + + var err error + + // generate missing context-dependent files. + if w.context != nil && file == fmt.Sprintf("zgoos_%s.go", w.context.GOOS) { + src := fmt.Sprintf("package runtime; const theGoos = `%s`", w.context.GOOS) + f, err = parser.ParseFile(w.fset, filename, src, 0) + if err != nil { + log.Fatalf("incorrect generated file: %s", err) + } + } + + if w.context != nil && file == fmt.Sprintf("zgoarch_%s.go", w.context.GOARCH) { + src := fmt.Sprintf("package runtime; const theGoarch = `%s`", w.context.GOARCH) + f, err = parser.ParseFile(w.fset, filename, src, 0) + if err != nil { + log.Fatalf("incorrect generated file: %s", err) + } + } + + if f == nil { + flag := parser.AllErrors + if typesFindDoc { + flag |= parser.ParseComments + } + f, err = parser.ParseFile(w.fset, filename, src, flag) + if err != nil { + return f, err + } + } + + w.parsedFileCache[filename] = f + return f, nil +} + +func (w *PkgWalker) LookupCursor(pkg *types.Package, conf *PkgConfig, cursor *FileCursor) { + is := w.CheckIsImport(cursor) + if is != nil { + if cursor.xtest { + w.LookupImport(conf.XPkg, conf.XInfo, cursor, is) + } else { + w.LookupImport(conf.Pkg, conf.Info, cursor, is) + } + } else { + w.LookupObjects(conf, cursor) + } +} + +func (w *PkgWalker) LookupImport(pkg *types.Package, pkgInfo *types.Info, cursor *FileCursor, is *ast.ImportSpec) { + fpath, err := strconv.Unquote(is.Path.Value) + if err != nil { + return + } + + if typesFindDef { + fmt.Println(w.fset.Position(is.Pos())) + } + + fbase := fpath + pos := strings.LastIndexAny(fpath, "./-\\") + if pos != -1 { + fbase = fpath[pos+1:] + } + + var fname string + if is.Name != nil { + fname = is.Name.Name + } else { + fname = fbase + } + + if typesFindInfo { + if fname == fpath { + fmt.Printf("package %s\n", fname) + } else { + fmt.Printf("package %s (\"%s\")\n", fname, fpath) + } + } + + if !typesFindUse { + return + } + + fid := pkg.Path() + "." + fname + var usages []int + for id, obj := range pkgInfo.Uses { + if obj != nil && obj.Id() == fid { //!= nil && cursorObj.Pos() == obj.Pos() { + usages = append(usages, int(id.Pos())) + } + } + (sort.IntSlice(usages)).Sort() + for _, pos := range usages { + fmt.Println(w.fset.Position(token.Pos(pos))) + } +} + +func parserObjKind(obj types.Object) (ObjKind, error) { + var kind ObjKind + switch t := obj.(type) { + case *types.PkgName: + kind = ObjPkgName + case *types.Const: + kind = ObjConst + case *types.TypeName: + kind = ObjTypeName + switch t.Type().Underlying().(type) { + case *types.Interface: + kind = ObjInterface + case *types.Struct: + kind = ObjStruct + } + case *types.Var: + kind = ObjVar + if t.IsField() { + kind = ObjField + } + case *types.Func: + kind = ObjFunc + if sig, ok := t.Type().(*types.Signature); ok { + if sig.Recv() != nil { + kind = ObjMethod + } + } + case *types.Label: + kind = ObjLabel + case *types.Builtin: + kind = ObjBuiltin + case *types.Nil: + kind = ObjNil + default: + return ObjNone, fmt.Errorf("unknown obj type %T", obj) + } + return kind, nil +} + +func (w *PkgWalker) LookupStructFromField(info *types.Info, cursorPkg *types.Package, cursorObj types.Object, cursorPos token.Pos) types.Object { + if info == nil { + conf := &PkgConfig{ + IgnoreFuncBodies: true, + AllowBinary: true, + WithTestFiles: true, + Info: &types.Info{ + Defs: make(map[*ast.Ident]types.Object), + }, + } + w.imported[cursorPkg.Path()] = nil + pkg, _ := w.Import("", cursorPkg.Path(), conf) + if pkg != nil { + info = conf.Info + } + } + for _, obj := range info.Defs { + if obj == nil { + continue + } + if _, ok := obj.(*types.TypeName); ok { + if t, ok := obj.Type().Underlying().(*types.Struct); ok { + for i := 0; i < t.NumFields(); i++ { + if t.Field(i).Pos() == cursorPos { + return obj + } + } + } + } + } + return nil +} + +func (w *PkgWalker) lookupNamedField(named *types.Named, name string) *types.Named { + if istruct, ok := named.Underlying().(*types.Struct); ok { + for i := 0; i < istruct.NumFields(); i++ { + field := istruct.Field(i) + if field.Anonymous() { + fieldType := orgType(field.Type()) + if typ, ok := fieldType.(*types.Named); ok { + if na := w.lookupNamedField(typ, name); na != nil { + return na + } + } + } else { + if field.Name() == name { + return named + } + } + } + } + return nil +} + +func (w *PkgWalker) lookupNamedMethod(named *types.Named, name string) (types.Object, *types.Named) { + if iface, ok := named.Underlying().(*types.Interface); ok { + for i := 0; i < iface.NumMethods(); i++ { + fn := iface.Method(i) + if fn.Name() == name { + return fn, named + } + } + for i := 0; i < iface.NumEmbeddeds(); i++ { + if obj, na := w.lookupNamedMethod(iface.Embedded(i), name); obj != nil { + return obj, na + } + } + return nil, nil + } + if istruct, ok := named.Underlying().(*types.Struct); ok { + for i := 0; i < named.NumMethods(); i++ { + fn := named.Method(i) + if fn.Name() == name { + return fn, named + } + } + for i := 0; i < istruct.NumFields(); i++ { + field := istruct.Field(i) + if !field.Anonymous() { + continue + } + if typ, ok := field.Type().(*types.Named); ok { + if obj, na := w.lookupNamedMethod(typ, name); obj != nil { + return obj, na + } + } + } + } + return nil, nil +} + +func IsSamePkg(a, b *types.Package) bool { + if a == b { + return true + } + if a == nil || b == nil { + return false + } + return a.Path() == b.Path() +} + +func IsSameObject(a, b types.Object) bool { + if a == b { + return true + } + if a == nil || b == nil { + return false + } + var apath string + var bpath string + if a.Pkg() != nil { + apath = a.Pkg().Path() + } + if b.Pkg() != nil { + bpath = b.Pkg().Path() + } + if apath != bpath { + return false + } + if a.Id() != b.Id() { + return false + } + return a.String() == b.String() +} + +func orgType(typ types.Type) types.Type { + if pt, ok := typ.(*types.Pointer); ok { + return pt.Elem() + } + return typ +} + +func (w *PkgWalker) LookupObjects(conf *PkgConfig, cursor *FileCursor) { + var cursorObj types.Object + var cursorSelection *types.Selection + var cursorObjIsDef bool + //lookup defs + + var pkg *types.Package + var pkgInfo *types.Info + if cursor.xtest { + pkgInfo = conf.XInfo + pkg = conf.XPkg + } else { + pkgInfo = conf.Info + pkg = conf.Pkg + } + + _ = cursorObjIsDef + if cursorObj == nil { + for sel, obj := range pkgInfo.Selections { + if cursor.pos >= sel.Sel.Pos() && cursor.pos <= sel.Sel.End() { + cursorObj = obj.Obj() + cursorSelection = obj + break + } + } + } + if cursorObj == nil { + for id, obj := range pkgInfo.Defs { + if cursor.pos >= id.Pos() && cursor.pos <= id.End() { + cursorObj = obj + cursorObjIsDef = true + break + } + } + } + _ = cursorSelection + if cursorObj == nil { + for id, obj := range pkgInfo.Uses { + if cursor.pos >= id.Pos() && cursor.pos <= id.End() { + cursorObj = obj + break + } + } + } + if cursorObj == nil { + return + } + kind, err := parserObjKind(cursorObj) + if err != nil { + log.Fatalln(err) + } + + if kind == ObjField { + if cursorObj.(*types.Var).Anonymous() { + typ := orgType(cursorObj.Type()) + if named, ok := typ.(*types.Named); ok { + cursorObj = named.Obj() + } + } + } + cursorPkg := cursorObj.Pkg() + cursorPos := cursorObj.Pos() + //var fieldTypeInfo *types.Info + var fieldTypeObj types.Object + // if cursorPkg == pkg { + // fieldTypeInfo = pkgInfo + // } + cursorIsInterfaceMethod := false + var cursorInterfaceTypeName string + if kind == ObjMethod && cursorSelection != nil && cursorSelection.Recv() != nil { + sig := cursorObj.(*types.Func).Type().Underlying().(*types.Signature) + if _, ok := sig.Recv().Type().Underlying().(*types.Interface); ok { + if named, ok := cursorSelection.Recv().(*types.Named); ok { + obj, typ := w.lookupNamedMethod(named, cursorObj.Name()) + if obj != nil { + cursorObj = obj + } + if typ != nil { + cursorPkg = typ.Obj().Pkg() + cursorInterfaceTypeName = typ.Obj().Name() + } + cursorIsInterfaceMethod = true + } + } + } else if kind == ObjField && cursorSelection != nil { + if recv := cursorSelection.Recv(); recv != nil { + typ := orgType(recv) + if typ != nil { + if name, ok := typ.(*types.Named); ok { + fieldTypeObj = name.Obj() + na := w.lookupNamedField(name, cursorObj.Name()) + if na != nil { + fieldTypeObj = na.Obj() + } + } + } + } + } + if cursorPkg != nil && cursorPkg != pkg && + kind != ObjPkgName && w.isBinaryPkg(cursorPkg.Path()) { + conf := &PkgConfig{ + IgnoreFuncBodies: true, + AllowBinary: true, + WithTestFiles: true, + Info: &types.Info{ + Defs: make(map[*ast.Ident]types.Object), + }, + } + pkg, _ := w.Import("", cursorPkg.Path(), conf) + if pkg != nil { + if cursorIsInterfaceMethod { + for _, obj := range conf.Info.Defs { + if obj == nil { + continue + } + if fn, ok := obj.(*types.Func); ok { + if fn.Name() == cursorObj.Name() { + if sig, ok := fn.Type().Underlying().(*types.Signature); ok { + if named, ok := sig.Recv().Type().(*types.Named); ok { + if named.Obj() != nil && named.Obj().Name() == cursorInterfaceTypeName { + cursorPos = obj.Pos() + break + } + } + } + } + } + } + } else if kind == ObjField && fieldTypeObj != nil { + for _, obj := range conf.Info.Defs { + if obj == nil { + continue + } + if _, ok := obj.(*types.TypeName); ok { + if IsSameObject(fieldTypeObj, obj) { + if t, ok := obj.Type().Underlying().(*types.Struct); ok { + for i := 0; i < t.NumFields(); i++ { + if t.Field(i).Id() == cursorObj.Id() { + cursorPos = t.Field(i).Pos() + break + } + } + } + break + } + } + } + } else { + for k, v := range conf.Info.Defs { + if k != nil && v != nil && IsSameObject(v, cursorObj) { + cursorPos = k.Pos() + break + } + } + } + } + // if kind == ObjField || cursorIsInterfaceMethod { + // fieldTypeInfo = conf.Info + // } + } + // if kind == ObjField { + // fieldTypeObj = w.LookupStructFromField(fieldTypeInfo, cursorPkg, cursorObj, cursorPos) + // } + if typesFindDef { + fmt.Println(w.fset.Position(cursorPos)) + } + if typesFindInfo { + if kind == ObjField && fieldTypeObj != nil { + typeName := fieldTypeObj.Name() + if fieldTypeObj.Pkg() != nil && fieldTypeObj.Pkg() != pkg { + typeName = fieldTypeObj.Pkg().Name() + "." + fieldTypeObj.Name() + } + fmt.Println(typeName, simpleObjInfo(cursorObj)) + } else if kind == ObjBuiltin { + fmt.Println(builtinInfo(cursorObj.Name())) + } else if kind == ObjPkgName { + fmt.Println(cursorObj.String()) + } else if cursorIsInterfaceMethod { + fmt.Println(strings.Replace(simpleObjInfo(cursorObj), "(interface)", cursorPkg.Name()+"."+cursorInterfaceTypeName, 1)) + } else { + fmt.Println(simpleObjInfo(cursorObj)) + } + } + + if typesFindDoc && typesFindDef { + pos := w.fset.Position(cursorPos) + file := w.parsedFileCache[pos.Filename] + if file != nil { + line := pos.Line + var group *ast.CommentGroup + for _, v := range file.Comments { + lastLine := w.fset.Position(v.End()).Line + if lastLine == line || lastLine == line-1 { + group = v + } else if lastLine > line { + break + } + } + if group != nil { + fmt.Println(group.Text()) + } + } + } + if !typesFindUse { + return + } + + var usages []int + if kind == ObjPkgName { + for id, obj := range pkgInfo.Uses { + if obj != nil && obj.Id() == cursorObj.Id() { //!= nil && cursorObj.Pos() == obj.Pos() { + usages = append(usages, int(id.Pos())) + } + } + } else { + // for id, obj := range pkgInfo.Defs { + // if obj == cursorObj { //!= nil && cursorObj.Pos() == obj.Pos() { + // usages = append(usages, int(id.Pos())) + // } + // } + for id, obj := range pkgInfo.Uses { + if obj == cursorObj { //!= nil && cursorObj.Pos() == obj.Pos() { + usages = append(usages, int(id.Pos())) + } + } + } + var pkg_path string + var xpkg_path string + if conf.Pkg != nil { + pkg_path = conf.Pkg.Path() + } + if conf.XPkg != nil { + xpkg_path = conf.XPkg.Path() + } + + if cursorPkg != nil && (cursorPkg.Path() == pkg_path || + cursorPkg.Path() == xpkg_path) { + usages = append(usages, int(cursorPos)) + } + + (sort.IntSlice(usages)).Sort() + for _, pos := range usages { + fmt.Println(w.fset.Position(token.Pos(pos))) + } + //check look for current pkg.object on pkg_test + if typesFindUseAll || IsSamePkg(cursorPkg, conf.Pkg) { + var addInfo *types.Info + if conf.Cursor.xtest { + addInfo = conf.Info + } else { + addInfo = conf.XInfo + } + if addInfo != nil && cursorPkg != nil { + var usages []int + // for id, obj := range addInfo.Defs { + // if id != nil && obj != nil && obj.Id() == cursorObj.Id() { + // usages = append(usages, int(id.Pos())) + // } + // } + for k, v := range addInfo.Uses { + if k != nil && v != nil && IsSameObject(v, cursorObj) { + usages = append(usages, int(k.Pos())) + } + } + (sort.IntSlice(usages)).Sort() + for _, pos := range usages { + fmt.Println(w.fset.Position(token.Pos(pos))) + } + } + } + if !typesFindUseAll { + return + } + + if cursorPkg == nil { + return + } + + var find_def_pkg string + var uses_paths []string + if cursorPkg.Path() != pkg_path && cursorPkg.Path() != xpkg_path { + find_def_pkg = cursorPkg.Path() + uses_paths = append(uses_paths, cursorPkg.Path()) + } + + buildutil.ForEachPackage(&build.Default, func(importPath string, err error) { + if err != nil { + return + } + if importPath == conf.Pkg.Path() { + return + } + bp, err := w.importPath(importPath, 0) + if err != nil { + return + } + find := false + if bp.ImportPath == cursorPkg.Path() { + find = true + } else { + for _, v := range bp.Imports { + if v == cursorObj.Pkg().Path() { + find = true + break + } + } + } + if find { + for _, v := range uses_paths { + if v == bp.ImportPath { + return + } + } + uses_paths = append(uses_paths, bp.ImportPath) + } + }) + + w.imported = make(map[string]*types.Package) + for _, v := range uses_paths { + conf := &PkgConfig{ + IgnoreFuncBodies: false, + AllowBinary: true, + WithTestFiles: true, + Info: &types.Info{ + Uses: make(map[*ast.Ident]types.Object), + }, + XInfo: &types.Info{ + Uses: make(map[*ast.Ident]types.Object), + }, + } + w.imported[v] = nil + var usages []int + vpkg, _ := w.Import("", v, conf) + if vpkg != nil && vpkg != pkg { + if conf.Info != nil { + for k, v := range conf.Info.Uses { + if k != nil && v != nil && IsSameObject(v, cursorObj) { + usages = append(usages, int(k.Pos())) + } + } + } + if conf.XInfo != nil { + for k, v := range conf.XInfo.Uses { + if k != nil && v != nil && IsSameObject(v, cursorObj) { + usages = append(usages, int(k.Pos())) + } + } + } + } + if v == find_def_pkg { + usages = append(usages, int(cursorPos)) + } + (sort.IntSlice(usages)).Sort() + for _, pos := range usages { + fmt.Println(w.fset.Position(token.Pos(pos))) + } + } +} + +func (w *PkgWalker) CheckIsImport(cursor *FileCursor) *ast.ImportSpec { + if cursor.fileDir == "" { + return nil + } + file, _ := w.parseFile(cursor.fileDir, cursor.fileName, cursor.src) + if file == nil { + return nil + } + for _, is := range file.Imports { + if inRange(is, cursor.pos) { + return is + } + } + return nil +} + +func inRange(node ast.Node, p token.Pos) bool { + if node == nil { + return false + } + return p >= node.Pos() && p <= node.End() +} + +func (w *PkgWalker) nodeString(node interface{}) string { + if node == nil { + return "" + } + var b bytes.Buffer + printer.Fprint(&b, w.fset, node) + return b.String() +} diff --git a/vendor/golang.org/x/tools/LICENSE b/vendor/golang.org/x/tools/LICENSE new file mode 100644 index 0000000..6a66aea --- /dev/null +++ b/vendor/golang.org/x/tools/LICENSE @@ -0,0 +1,27 @@ +Copyright (c) 2009 The Go Authors. All rights reserved. + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are +met: + + * Redistributions of source code must retain the above copyright +notice, this list of conditions and the following disclaimer. + * Redistributions in binary form must reproduce the above +copyright notice, this list of conditions and the following disclaimer +in the documentation and/or other materials provided with the +distribution. + * Neither the name of Google Inc. nor the names of its +contributors may be used to endorse or promote products derived from +this software without specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. diff --git a/vendor/golang.org/x/tools/PATENTS b/vendor/golang.org/x/tools/PATENTS new file mode 100644 index 0000000..7330990 --- /dev/null +++ b/vendor/golang.org/x/tools/PATENTS @@ -0,0 +1,22 @@ +Additional IP Rights Grant (Patents) + +"This implementation" means the copyrightable works distributed by +Google as part of the Go project. + +Google hereby grants to You a perpetual, worldwide, non-exclusive, +no-charge, royalty-free, irrevocable (except as stated in this section) +patent license to make, have made, use, offer to sell, sell, import, +transfer and otherwise run, modify and propagate the contents of this +implementation of Go, where such license applies only to those patent +claims, both currently owned or controlled by Google and acquired in +the future, licensable by Google that are necessarily infringed by this +implementation of Go. This grant does not include claims that would be +infringed only as a consequence of further modification of this +implementation. If you or your agent or exclusive licensee institute or +order or agree to the institution of patent litigation against any +entity (including a cross-claim or counterclaim in a lawsuit) alleging +that this implementation of Go or any code incorporated within this +implementation of Go constitutes direct or contributory patent +infringement, or inducement of patent infringement, then any patent +rights granted to you under this License for this implementation of Go +shall terminate as of the date such litigation is filed. diff --git a/vendor/golang.org/x/tools/container/intsets/sparse.go b/vendor/golang.org/x/tools/container/intsets/sparse.go new file mode 100644 index 0000000..8847feb --- /dev/null +++ b/vendor/golang.org/x/tools/container/intsets/sparse.go @@ -0,0 +1,967 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package intsets provides Sparse, a compact and fast representation +// for sparse sets of int values. +// +// The time complexity of the operations Len, Insert, Remove and Has +// is in O(n) but in practice those methods are faster and more +// space-efficient than equivalent operations on sets based on the Go +// map type. The IsEmpty, Min, Max, Clear and TakeMin operations +// require constant time. +// +package intsets // import "golang.org/x/tools/container/intsets" + +// TODO(adonovan): +// - Add InsertAll(...int), RemoveAll(...int) +// - Add 'bool changed' results for {Intersection,Difference}With too. +// +// TODO(adonovan): implement Dense, a dense bit vector with a similar API. +// The space usage would be proportional to Max(), not Len(), and the +// implementation would be based upon big.Int. +// +// TODO(adonovan): experiment with making the root block indirect (nil +// iff IsEmpty). This would reduce the memory usage when empty and +// might simplify the aliasing invariants. +// +// TODO(adonovan): opt: make UnionWith and Difference faster. +// These are the hot-spots for go/pointer. + +import ( + "bytes" + "fmt" +) + +// A Sparse is a set of int values. +// Sparse operations (even queries) are not concurrency-safe. +// +// The zero value for Sparse is a valid empty set. +// +// Sparse sets must be copied using the Copy method, not by assigning +// a Sparse value. +// +type Sparse struct { + // An uninitialized Sparse represents an empty set. + // An empty set may also be represented by + // root.next == root.prev == &root. + // In a non-empty set, root.next points to the first block and + // root.prev to the last. + // root.offset and root.bits are unused. + root block +} + +type word uintptr + +const ( + _m = ^word(0) + bitsPerWord = 8 << (_m>>8&1 + _m>>16&1 + _m>>32&1) + bitsPerBlock = 256 // optimal value for go/pointer solver performance + wordsPerBlock = bitsPerBlock / bitsPerWord +) + +// Limit values of implementation-specific int type. +const ( + MaxInt = int(^uint(0) >> 1) + MinInt = -MaxInt - 1 +) + +// -- block ------------------------------------------------------------ + +// A set is represented as a circular doubly-linked list of blocks, +// each containing an offset and a bit array of fixed size +// bitsPerBlock; the blocks are ordered by increasing offset. +// +// The set contains an element x iff the block whose offset is x - (x +// mod bitsPerBlock) has the bit (x mod bitsPerBlock) set, where mod +// is the Euclidean remainder. +// +// A block may only be empty transiently. +// +type block struct { + offset int // offset mod bitsPerBlock == 0 + bits [wordsPerBlock]word // contains at least one set bit + next, prev *block // doubly-linked list of blocks +} + +// wordMask returns the word index (in block.bits) +// and single-bit mask for the block's ith bit. +func wordMask(i uint) (w uint, mask word) { + w = i / bitsPerWord + mask = 1 << (i % bitsPerWord) + return +} + +// insert sets the block b's ith bit and +// returns true if it was not already set. +// +func (b *block) insert(i uint) bool { + w, mask := wordMask(i) + if b.bits[w]&mask == 0 { + b.bits[w] |= mask + return true + } + return false +} + +// remove clears the block's ith bit and +// returns true if the bit was previously set. +// NB: may leave the block empty. +// +func (b *block) remove(i uint) bool { + w, mask := wordMask(i) + if b.bits[w]&mask != 0 { + b.bits[w] &^= mask + return true + } + return false +} + +// has reports whether the block's ith bit is set. +func (b *block) has(i uint) bool { + w, mask := wordMask(i) + return b.bits[w]&mask != 0 +} + +// empty reports whether b.len()==0, but more efficiently. +func (b *block) empty() bool { + for _, w := range b.bits { + if w != 0 { + return false + } + } + return true +} + +// len returns the number of set bits in block b. +func (b *block) len() int { + var l int + for _, w := range b.bits { + l += popcount(w) + } + return l +} + +// max returns the maximum element of the block. +// The block must not be empty. +// +func (b *block) max() int { + bi := b.offset + bitsPerBlock + // Decrement bi by number of high zeros in last.bits. + for i := len(b.bits) - 1; i >= 0; i-- { + if w := b.bits[i]; w != 0 { + return bi - nlz(w) - 1 + } + bi -= bitsPerWord + } + panic("BUG: empty block") +} + +// min returns the minimum element of the block, +// and also removes it if take is set. +// The block must not be initially empty. +// NB: may leave the block empty. +// +func (b *block) min(take bool) int { + for i, w := range b.bits { + if w != 0 { + tz := ntz(w) + if take { + b.bits[i] = w &^ (1 << uint(tz)) + } + return b.offset + int(i*bitsPerWord) + tz + } + } + panic("BUG: empty block") +} + +// forEach calls f for each element of block b. +// f must not mutate b's enclosing Sparse. +func (b *block) forEach(f func(int)) { + for i, w := range b.bits { + offset := b.offset + i*bitsPerWord + for bi := 0; w != 0 && bi < bitsPerWord; bi++ { + if w&1 != 0 { + f(offset) + } + offset++ + w >>= 1 + } + } +} + +// offsetAndBitIndex returns the offset of the block that would +// contain x and the bit index of x within that block. +// +func offsetAndBitIndex(x int) (int, uint) { + mod := x % bitsPerBlock + if mod < 0 { + // Euclidean (non-negative) remainder + mod += bitsPerBlock + } + return x - mod, uint(mod) +} + +// -- Sparse -------------------------------------------------------------- + +// start returns the root's next block, which is the root block +// (if s.IsEmpty()) or the first true block otherwise. +// start has the side effect of ensuring that s is properly +// initialized. +// +func (s *Sparse) start() *block { + root := &s.root + if root.next == nil { + root.next = root + root.prev = root + } else if root.next.prev != root { + // Copying a Sparse x leads to pernicious corruption: the + // new Sparse y shares the old linked list, but iteration + // on y will never encounter &y.root so it goes into a + // loop. Fail fast before this occurs. + panic("A Sparse has been copied without (*Sparse).Copy()") + } + + return root.next +} + +// IsEmpty reports whether the set s is empty. +func (s *Sparse) IsEmpty() bool { + return s.start() == &s.root +} + +// Len returns the number of elements in the set s. +func (s *Sparse) Len() int { + var l int + for b := s.start(); b != &s.root; b = b.next { + l += b.len() + } + return l +} + +// Max returns the maximum element of the set s, or MinInt if s is empty. +func (s *Sparse) Max() int { + if s.IsEmpty() { + return MinInt + } + return s.root.prev.max() +} + +// Min returns the minimum element of the set s, or MaxInt if s is empty. +func (s *Sparse) Min() int { + if s.IsEmpty() { + return MaxInt + } + return s.root.next.min(false) +} + +// block returns the block that would contain offset, +// or nil if s contains no such block. +// +func (s *Sparse) block(offset int) *block { + b := s.start() + for b != &s.root && b.offset <= offset { + if b.offset == offset { + return b + } + b = b.next + } + return nil +} + +// Insert adds x to the set s, and reports whether the set grew. +func (s *Sparse) Insert(x int) bool { + offset, i := offsetAndBitIndex(x) + b := s.start() + for b != &s.root && b.offset <= offset { + if b.offset == offset { + return b.insert(i) + } + b = b.next + } + + // Insert new block before b. + new := &block{offset: offset} + new.next = b + new.prev = b.prev + new.prev.next = new + new.next.prev = new + return new.insert(i) +} + +func (s *Sparse) removeBlock(b *block) { + b.prev.next = b.next + b.next.prev = b.prev +} + +// Remove removes x from the set s, and reports whether the set shrank. +func (s *Sparse) Remove(x int) bool { + offset, i := offsetAndBitIndex(x) + if b := s.block(offset); b != nil { + if !b.remove(i) { + return false + } + if b.empty() { + s.removeBlock(b) + } + return true + } + return false +} + +// Clear removes all elements from the set s. +func (s *Sparse) Clear() { + s.root.next = &s.root + s.root.prev = &s.root +} + +// If set s is non-empty, TakeMin sets *p to the minimum element of +// the set s, removes that element from the set and returns true. +// Otherwise, it returns false and *p is undefined. +// +// This method may be used for iteration over a worklist like so: +// +// var x int +// for worklist.TakeMin(&x) { use(x) } +// +func (s *Sparse) TakeMin(p *int) bool { + head := s.start() + if head == &s.root { + return false + } + *p = head.min(true) + if head.empty() { + s.removeBlock(head) + } + return true +} + +// Has reports whether x is an element of the set s. +func (s *Sparse) Has(x int) bool { + offset, i := offsetAndBitIndex(x) + if b := s.block(offset); b != nil { + return b.has(i) + } + return false +} + +// forEach applies function f to each element of the set s in order. +// +// f must not mutate s. Consequently, forEach is not safe to expose +// to clients. In any case, using "range s.AppendTo()" allows more +// natural control flow with continue/break/return. +// +func (s *Sparse) forEach(f func(int)) { + for b := s.start(); b != &s.root; b = b.next { + b.forEach(f) + } +} + +// Copy sets s to the value of x. +func (s *Sparse) Copy(x *Sparse) { + if s == x { + return + } + + xb := x.start() + sb := s.start() + for xb != &x.root { + if sb == &s.root { + sb = s.insertBlockBefore(sb) + } + sb.offset = xb.offset + sb.bits = xb.bits + xb = xb.next + sb = sb.next + } + s.discardTail(sb) +} + +// insertBlockBefore returns a new block, inserting it before next. +func (s *Sparse) insertBlockBefore(next *block) *block { + b := new(block) + b.next = next + b.prev = next.prev + b.prev.next = b + next.prev = b + return b +} + +// discardTail removes block b and all its successors from s. +func (s *Sparse) discardTail(b *block) { + if b != &s.root { + b.prev.next = &s.root + s.root.prev = b.prev + } +} + +// IntersectionWith sets s to the intersection s ∩ x. +func (s *Sparse) IntersectionWith(x *Sparse) { + if s == x { + return + } + + xb := x.start() + sb := s.start() + for xb != &x.root && sb != &s.root { + switch { + case xb.offset < sb.offset: + xb = xb.next + + case xb.offset > sb.offset: + sb = sb.next + s.removeBlock(sb.prev) + + default: + var sum word + for i := range sb.bits { + r := xb.bits[i] & sb.bits[i] + sb.bits[i] = r + sum |= r + } + if sum != 0 { + sb = sb.next + } else { + // sb will be overwritten or removed + } + + xb = xb.next + } + } + + s.discardTail(sb) +} + +// Intersection sets s to the intersection x ∩ y. +func (s *Sparse) Intersection(x, y *Sparse) { + switch { + case s == x: + s.IntersectionWith(y) + return + case s == y: + s.IntersectionWith(x) + return + case x == y: + s.Copy(x) + return + } + + xb := x.start() + yb := y.start() + sb := s.start() + for xb != &x.root && yb != &y.root { + switch { + case xb.offset < yb.offset: + xb = xb.next + continue + case xb.offset > yb.offset: + yb = yb.next + continue + } + + if sb == &s.root { + sb = s.insertBlockBefore(sb) + } + sb.offset = xb.offset + + var sum word + for i := range sb.bits { + r := xb.bits[i] & yb.bits[i] + sb.bits[i] = r + sum |= r + } + if sum != 0 { + sb = sb.next + } else { + // sb will be overwritten or removed + } + + xb = xb.next + yb = yb.next + } + + s.discardTail(sb) +} + +// Intersects reports whether s ∩ x ≠ ∅. +func (s *Sparse) Intersects(x *Sparse) bool { + sb := s.start() + xb := x.start() + for sb != &s.root && xb != &x.root { + switch { + case xb.offset < sb.offset: + xb = xb.next + case xb.offset > sb.offset: + sb = sb.next + default: + for i := range sb.bits { + if sb.bits[i]&xb.bits[i] != 0 { + return true + } + } + sb = sb.next + xb = xb.next + } + } + return false +} + +// UnionWith sets s to the union s ∪ x, and reports whether s grew. +func (s *Sparse) UnionWith(x *Sparse) bool { + if s == x { + return false + } + + var changed bool + xb := x.start() + sb := s.start() + for xb != &x.root { + if sb != &s.root && sb.offset == xb.offset { + for i := range xb.bits { + if sb.bits[i] != xb.bits[i] { + sb.bits[i] |= xb.bits[i] + changed = true + } + } + xb = xb.next + } else if sb == &s.root || sb.offset > xb.offset { + sb = s.insertBlockBefore(sb) + sb.offset = xb.offset + sb.bits = xb.bits + changed = true + + xb = xb.next + } + sb = sb.next + } + return changed +} + +// Union sets s to the union x ∪ y. +func (s *Sparse) Union(x, y *Sparse) { + switch { + case x == y: + s.Copy(x) + return + case s == x: + s.UnionWith(y) + return + case s == y: + s.UnionWith(x) + return + } + + xb := x.start() + yb := y.start() + sb := s.start() + for xb != &x.root || yb != &y.root { + if sb == &s.root { + sb = s.insertBlockBefore(sb) + } + switch { + case yb == &y.root || (xb != &x.root && xb.offset < yb.offset): + sb.offset = xb.offset + sb.bits = xb.bits + xb = xb.next + + case xb == &x.root || (yb != &y.root && yb.offset < xb.offset): + sb.offset = yb.offset + sb.bits = yb.bits + yb = yb.next + + default: + sb.offset = xb.offset + for i := range xb.bits { + sb.bits[i] = xb.bits[i] | yb.bits[i] + } + xb = xb.next + yb = yb.next + } + sb = sb.next + } + + s.discardTail(sb) +} + +// DifferenceWith sets s to the difference s ∖ x. +func (s *Sparse) DifferenceWith(x *Sparse) { + if s == x { + s.Clear() + return + } + + xb := x.start() + sb := s.start() + for xb != &x.root && sb != &s.root { + switch { + case xb.offset > sb.offset: + sb = sb.next + + case xb.offset < sb.offset: + xb = xb.next + + default: + var sum word + for i := range sb.bits { + r := sb.bits[i] & ^xb.bits[i] + sb.bits[i] = r + sum |= r + } + sb = sb.next + xb = xb.next + + if sum == 0 { + s.removeBlock(sb.prev) + } + } + } +} + +// Difference sets s to the difference x ∖ y. +func (s *Sparse) Difference(x, y *Sparse) { + switch { + case x == y: + s.Clear() + return + case s == x: + s.DifferenceWith(y) + return + case s == y: + var y2 Sparse + y2.Copy(y) + s.Difference(x, &y2) + return + } + + xb := x.start() + yb := y.start() + sb := s.start() + for xb != &x.root && yb != &y.root { + if xb.offset > yb.offset { + // y has block, x has none + yb = yb.next + continue + } + + if sb == &s.root { + sb = s.insertBlockBefore(sb) + } + sb.offset = xb.offset + + switch { + case xb.offset < yb.offset: + // x has block, y has none + sb.bits = xb.bits + + sb = sb.next + + default: + // x and y have corresponding blocks + var sum word + for i := range sb.bits { + r := xb.bits[i] & ^yb.bits[i] + sb.bits[i] = r + sum |= r + } + if sum != 0 { + sb = sb.next + } else { + // sb will be overwritten or removed + } + + yb = yb.next + } + xb = xb.next + } + + for xb != &x.root { + if sb == &s.root { + sb = s.insertBlockBefore(sb) + } + sb.offset = xb.offset + sb.bits = xb.bits + sb = sb.next + + xb = xb.next + } + + s.discardTail(sb) +} + +// SymmetricDifferenceWith sets s to the symmetric difference s ∆ x. +func (s *Sparse) SymmetricDifferenceWith(x *Sparse) { + if s == x { + s.Clear() + return + } + + sb := s.start() + xb := x.start() + for xb != &x.root && sb != &s.root { + switch { + case sb.offset < xb.offset: + sb = sb.next + case xb.offset < sb.offset: + nb := s.insertBlockBefore(sb) + nb.offset = xb.offset + nb.bits = xb.bits + xb = xb.next + default: + var sum word + for i := range sb.bits { + r := sb.bits[i] ^ xb.bits[i] + sb.bits[i] = r + sum |= r + } + sb = sb.next + xb = xb.next + if sum == 0 { + s.removeBlock(sb.prev) + } + } + } + + for xb != &x.root { // append the tail of x to s + sb = s.insertBlockBefore(sb) + sb.offset = xb.offset + sb.bits = xb.bits + sb = sb.next + xb = xb.next + } +} + +// SymmetricDifference sets s to the symmetric difference x ∆ y. +func (s *Sparse) SymmetricDifference(x, y *Sparse) { + switch { + case x == y: + s.Clear() + return + case s == x: + s.SymmetricDifferenceWith(y) + return + case s == y: + s.SymmetricDifferenceWith(x) + return + } + + sb := s.start() + xb := x.start() + yb := y.start() + for xb != &x.root && yb != &y.root { + if sb == &s.root { + sb = s.insertBlockBefore(sb) + } + switch { + case yb.offset < xb.offset: + sb.offset = yb.offset + sb.bits = yb.bits + sb = sb.next + yb = yb.next + case xb.offset < yb.offset: + sb.offset = xb.offset + sb.bits = xb.bits + sb = sb.next + xb = xb.next + default: + var sum word + for i := range sb.bits { + r := xb.bits[i] ^ yb.bits[i] + sb.bits[i] = r + sum |= r + } + if sum != 0 { + sb.offset = xb.offset + sb = sb.next + } + xb = xb.next + yb = yb.next + } + } + + for xb != &x.root { // append the tail of x to s + if sb == &s.root { + sb = s.insertBlockBefore(sb) + } + sb.offset = xb.offset + sb.bits = xb.bits + sb = sb.next + xb = xb.next + } + + for yb != &y.root { // append the tail of y to s + if sb == &s.root { + sb = s.insertBlockBefore(sb) + } + sb.offset = yb.offset + sb.bits = yb.bits + sb = sb.next + yb = yb.next + } + + s.discardTail(sb) +} + +// SubsetOf reports whether s ∖ x = ∅. +func (s *Sparse) SubsetOf(x *Sparse) bool { + if s == x { + return true + } + + sb := s.start() + xb := x.start() + for sb != &s.root { + switch { + case xb == &x.root || xb.offset > sb.offset: + return false + case xb.offset < sb.offset: + xb = xb.next + default: + for i := range sb.bits { + if sb.bits[i]&^xb.bits[i] != 0 { + return false + } + } + sb = sb.next + xb = xb.next + } + } + return true +} + +// Equals reports whether the sets s and t have the same elements. +func (s *Sparse) Equals(t *Sparse) bool { + if s == t { + return true + } + sb := s.start() + tb := t.start() + for { + switch { + case sb == &s.root && tb == &t.root: + return true + case sb == &s.root || tb == &t.root: + return false + case sb.offset != tb.offset: + return false + case sb.bits != tb.bits: + return false + } + + sb = sb.next + tb = tb.next + } +} + +// String returns a human-readable description of the set s. +func (s *Sparse) String() string { + var buf bytes.Buffer + buf.WriteByte('{') + s.forEach(func(x int) { + if buf.Len() > 1 { + buf.WriteByte(' ') + } + fmt.Fprintf(&buf, "%d", x) + }) + buf.WriteByte('}') + return buf.String() +} + +// BitString returns the set as a string of 1s and 0s denoting the sum +// of the i'th powers of 2, for each i in s. A radix point, always +// preceded by a digit, appears if the sum is non-integral. +// +// Examples: +// {}.BitString() = "0" +// {4,5}.BitString() = "110000" +// {-3}.BitString() = "0.001" +// {-3,0,4,5}.BitString() = "110001.001" +// +func (s *Sparse) BitString() string { + if s.IsEmpty() { + return "0" + } + + min, max := s.Min(), s.Max() + var nbytes int + if max > 0 { + nbytes = max + } + nbytes++ // zero bit + radix := nbytes + if min < 0 { + nbytes += len(".") - min + } + + b := make([]byte, nbytes) + for i := range b { + b[i] = '0' + } + if radix < nbytes { + b[radix] = '.' + } + s.forEach(func(x int) { + if x >= 0 { + x += len(".") + } + b[radix-x] = '1' + }) + return string(b) +} + +// GoString returns a string showing the internal representation of +// the set s. +// +func (s *Sparse) GoString() string { + var buf bytes.Buffer + for b := s.start(); b != &s.root; b = b.next { + fmt.Fprintf(&buf, "block %p {offset=%d next=%p prev=%p", + b, b.offset, b.next, b.prev) + for _, w := range b.bits { + fmt.Fprintf(&buf, " 0%016x", w) + } + fmt.Fprintf(&buf, "}\n") + } + return buf.String() +} + +// AppendTo returns the result of appending the elements of s to slice +// in order. +func (s *Sparse) AppendTo(slice []int) []int { + s.forEach(func(x int) { + slice = append(slice, x) + }) + return slice +} + +// -- Testing/debugging ------------------------------------------------ + +// check returns an error if the representation invariants of s are violated. +func (s *Sparse) check() error { + if !s.root.empty() { + return fmt.Errorf("non-empty root block") + } + if s.root.offset != 0 { + return fmt.Errorf("root block has non-zero offset %d", s.root.offset) + } + for b := s.start(); b != &s.root; b = b.next { + if b.offset%bitsPerBlock != 0 { + return fmt.Errorf("bad offset modulo: %d", b.offset) + } + if b.empty() { + return fmt.Errorf("empty block") + } + if b.prev.next != b { + return fmt.Errorf("bad prev.next link") + } + if b.next.prev != b { + return fmt.Errorf("bad next.prev link") + } + if b.prev != &s.root { + if b.offset <= b.prev.offset { + return fmt.Errorf("bad offset order: b.offset=%d, prev.offset=%d", + b.offset, b.prev.offset) + } + } + } + return nil +} diff --git a/vendor/golang.org/x/tools/container/intsets/util.go b/vendor/golang.org/x/tools/container/intsets/util.go new file mode 100644 index 0000000..76e682c --- /dev/null +++ b/vendor/golang.org/x/tools/container/intsets/util.go @@ -0,0 +1,75 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package intsets + +var a [1 << 8]byte + +func init() { + for i := range a { + var n byte + for x := i; x != 0; x >>= 1 { + if x&1 != 0 { + n++ + } + } + a[i] = n + } +} + +// popcount returns the population count (number of set bits) of x. +func popcount(x word) int { + return int(a[byte(x>>(0*8))] + + a[byte(x>>(1*8))] + + a[byte(x>>(2*8))] + + a[byte(x>>(3*8))] + + a[byte(x>>(4*8))] + + a[byte(x>>(5*8))] + + a[byte(x>>(6*8))] + + a[byte(x>>(7*8))]) +} + +// nlz returns the number of leading zeros of x. +// From Hacker's Delight, fig 5.11. +func nlz(x word) int { + x |= (x >> 1) + x |= (x >> 2) + x |= (x >> 4) + x |= (x >> 8) + x |= (x >> 16) + x |= (x >> 32) + return popcount(^x) +} + +// ntz returns the number of trailing zeros of x. +// From Hacker's Delight, fig 5.13. +func ntz(x word) int { + if x == 0 { + return bitsPerWord + } + n := 1 + if bitsPerWord == 64 { + if (x & 0xffffffff) == 0 { + n = n + 32 + x = x >> 32 + } + } + if (x & 0x0000ffff) == 0 { + n = n + 16 + x = x >> 16 + } + if (x & 0x000000ff) == 0 { + n = n + 8 + x = x >> 8 + } + if (x & 0x0000000f) == 0 { + n = n + 4 + x = x >> 4 + } + if (x & 0x00000003) == 0 { + n = n + 2 + x = x >> 2 + } + return n - int(x&1) +} diff --git a/vendor/golang.org/x/tools/go/ast/astutil/enclosing.go b/vendor/golang.org/x/tools/go/ast/astutil/enclosing.go new file mode 100644 index 0000000..2de739e --- /dev/null +++ b/vendor/golang.org/x/tools/go/ast/astutil/enclosing.go @@ -0,0 +1,625 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package astutil + +// This file defines utilities for working with source positions. + +import ( + "fmt" + "go/ast" + "go/token" + "sort" +) + +// PathEnclosingInterval returns the node that encloses the source +// interval [start, end), and all its ancestors up to the AST root. +// +// The definition of "enclosing" used by this function considers +// additional whitespace abutting a node to be enclosed by it. +// In this example: +// +// z := x + y // add them +// <-A-> +// <----B-----> +// +// the ast.BinaryExpr(+) node is considered to enclose interval B +// even though its [Pos()..End()) is actually only interval A. +// This behaviour makes user interfaces more tolerant of imperfect +// input. +// +// This function treats tokens as nodes, though they are not included +// in the result. e.g. PathEnclosingInterval("+") returns the +// enclosing ast.BinaryExpr("x + y"). +// +// If start==end, the 1-char interval following start is used instead. +// +// The 'exact' result is true if the interval contains only path[0] +// and perhaps some adjacent whitespace. It is false if the interval +// overlaps multiple children of path[0], or if it contains only +// interior whitespace of path[0]. +// In this example: +// +// z := x + y // add them +// <--C--> <---E--> +// ^ +// D +// +// intervals C, D and E are inexact. C is contained by the +// z-assignment statement, because it spans three of its children (:=, +// x, +). So too is the 1-char interval D, because it contains only +// interior whitespace of the assignment. E is considered interior +// whitespace of the BlockStmt containing the assignment. +// +// Precondition: [start, end) both lie within the same file as root. +// TODO(adonovan): return (nil, false) in this case and remove precond. +// Requires FileSet; see loader.tokenFileContainsPos. +// +// Postcondition: path is never nil; it always contains at least 'root'. +// +func PathEnclosingInterval(root *ast.File, start, end token.Pos) (path []ast.Node, exact bool) { + // fmt.Printf("EnclosingInterval %d %d\n", start, end) // debugging + + // Precondition: node.[Pos..End) and adjoining whitespace contain [start, end). + var visit func(node ast.Node) bool + visit = func(node ast.Node) bool { + path = append(path, node) + + nodePos := node.Pos() + nodeEnd := node.End() + + // fmt.Printf("visit(%T, %d, %d)\n", node, nodePos, nodeEnd) // debugging + + // Intersect [start, end) with interval of node. + if start < nodePos { + start = nodePos + } + if end > nodeEnd { + end = nodeEnd + } + + // Find sole child that contains [start, end). + children := childrenOf(node) + l := len(children) + for i, child := range children { + // [childPos, childEnd) is unaugmented interval of child. + childPos := child.Pos() + childEnd := child.End() + + // [augPos, augEnd) is whitespace-augmented interval of child. + augPos := childPos + augEnd := childEnd + if i > 0 { + augPos = children[i-1].End() // start of preceding whitespace + } + if i < l-1 { + nextChildPos := children[i+1].Pos() + // Does [start, end) lie between child and next child? + if start >= augEnd && end <= nextChildPos { + return false // inexact match + } + augEnd = nextChildPos // end of following whitespace + } + + // fmt.Printf("\tchild %d: [%d..%d)\tcontains interval [%d..%d)?\n", + // i, augPos, augEnd, start, end) // debugging + + // Does augmented child strictly contain [start, end)? + if augPos <= start && end <= augEnd { + _, isToken := child.(tokenNode) + return isToken || visit(child) + } + + // Does [start, end) overlap multiple children? + // i.e. left-augmented child contains start + // but LR-augmented child does not contain end. + if start < childEnd && end > augEnd { + break + } + } + + // No single child contained [start, end), + // so node is the result. Is it exact? + + // (It's tempting to put this condition before the + // child loop, but it gives the wrong result in the + // case where a node (e.g. ExprStmt) and its sole + // child have equal intervals.) + if start == nodePos && end == nodeEnd { + return true // exact match + } + + return false // inexact: overlaps multiple children + } + + if start > end { + start, end = end, start + } + + if start < root.End() && end > root.Pos() { + if start == end { + end = start + 1 // empty interval => interval of size 1 + } + exact = visit(root) + + // Reverse the path: + for i, l := 0, len(path); i < l/2; i++ { + path[i], path[l-1-i] = path[l-1-i], path[i] + } + } else { + // Selection lies within whitespace preceding the + // first (or following the last) declaration in the file. + // The result nonetheless always includes the ast.File. + path = append(path, root) + } + + return +} + +// tokenNode is a dummy implementation of ast.Node for a single token. +// They are used transiently by PathEnclosingInterval but never escape +// this package. +// +type tokenNode struct { + pos token.Pos + end token.Pos +} + +func (n tokenNode) Pos() token.Pos { + return n.pos +} + +func (n tokenNode) End() token.Pos { + return n.end +} + +func tok(pos token.Pos, len int) ast.Node { + return tokenNode{pos, pos + token.Pos(len)} +} + +// childrenOf returns the direct non-nil children of ast.Node n. +// It may include fake ast.Node implementations for bare tokens. +// it is not safe to call (e.g.) ast.Walk on such nodes. +// +func childrenOf(n ast.Node) []ast.Node { + var children []ast.Node + + // First add nodes for all true subtrees. + ast.Inspect(n, func(node ast.Node) bool { + if node == n { // push n + return true // recur + } + if node != nil { // push child + children = append(children, node) + } + return false // no recursion + }) + + // Then add fake Nodes for bare tokens. + switch n := n.(type) { + case *ast.ArrayType: + children = append(children, + tok(n.Lbrack, len("[")), + tok(n.Elt.End(), len("]"))) + + case *ast.AssignStmt: + children = append(children, + tok(n.TokPos, len(n.Tok.String()))) + + case *ast.BasicLit: + children = append(children, + tok(n.ValuePos, len(n.Value))) + + case *ast.BinaryExpr: + children = append(children, tok(n.OpPos, len(n.Op.String()))) + + case *ast.BlockStmt: + children = append(children, + tok(n.Lbrace, len("{")), + tok(n.Rbrace, len("}"))) + + case *ast.BranchStmt: + children = append(children, + tok(n.TokPos, len(n.Tok.String()))) + + case *ast.CallExpr: + children = append(children, + tok(n.Lparen, len("(")), + tok(n.Rparen, len(")"))) + if n.Ellipsis != 0 { + children = append(children, tok(n.Ellipsis, len("..."))) + } + + case *ast.CaseClause: + if n.List == nil { + children = append(children, + tok(n.Case, len("default"))) + } else { + children = append(children, + tok(n.Case, len("case"))) + } + children = append(children, tok(n.Colon, len(":"))) + + case *ast.ChanType: + switch n.Dir { + case ast.RECV: + children = append(children, tok(n.Begin, len("<-chan"))) + case ast.SEND: + children = append(children, tok(n.Begin, len("chan<-"))) + case ast.RECV | ast.SEND: + children = append(children, tok(n.Begin, len("chan"))) + } + + case *ast.CommClause: + if n.Comm == nil { + children = append(children, + tok(n.Case, len("default"))) + } else { + children = append(children, + tok(n.Case, len("case"))) + } + children = append(children, tok(n.Colon, len(":"))) + + case *ast.Comment: + // nop + + case *ast.CommentGroup: + // nop + + case *ast.CompositeLit: + children = append(children, + tok(n.Lbrace, len("{")), + tok(n.Rbrace, len("{"))) + + case *ast.DeclStmt: + // nop + + case *ast.DeferStmt: + children = append(children, + tok(n.Defer, len("defer"))) + + case *ast.Ellipsis: + children = append(children, + tok(n.Ellipsis, len("..."))) + + case *ast.EmptyStmt: + // nop + + case *ast.ExprStmt: + // nop + + case *ast.Field: + // TODO(adonovan): Field.{Doc,Comment,Tag}? + + case *ast.FieldList: + children = append(children, + tok(n.Opening, len("(")), + tok(n.Closing, len(")"))) + + case *ast.File: + // TODO test: Doc + children = append(children, + tok(n.Package, len("package"))) + + case *ast.ForStmt: + children = append(children, + tok(n.For, len("for"))) + + case *ast.FuncDecl: + // TODO(adonovan): FuncDecl.Comment? + + // Uniquely, FuncDecl breaks the invariant that + // preorder traversal yields tokens in lexical order: + // in fact, FuncDecl.Recv precedes FuncDecl.Type.Func. + // + // As a workaround, we inline the case for FuncType + // here and order things correctly. + // + children = nil // discard ast.Walk(FuncDecl) info subtrees + children = append(children, tok(n.Type.Func, len("func"))) + if n.Recv != nil { + children = append(children, n.Recv) + } + children = append(children, n.Name) + if n.Type.Params != nil { + children = append(children, n.Type.Params) + } + if n.Type.Results != nil { + children = append(children, n.Type.Results) + } + if n.Body != nil { + children = append(children, n.Body) + } + + case *ast.FuncLit: + // nop + + case *ast.FuncType: + if n.Func != 0 { + children = append(children, + tok(n.Func, len("func"))) + } + + case *ast.GenDecl: + children = append(children, + tok(n.TokPos, len(n.Tok.String()))) + if n.Lparen != 0 { + children = append(children, + tok(n.Lparen, len("(")), + tok(n.Rparen, len(")"))) + } + + case *ast.GoStmt: + children = append(children, + tok(n.Go, len("go"))) + + case *ast.Ident: + children = append(children, + tok(n.NamePos, len(n.Name))) + + case *ast.IfStmt: + children = append(children, + tok(n.If, len("if"))) + + case *ast.ImportSpec: + // TODO(adonovan): ImportSpec.{Doc,EndPos}? + + case *ast.IncDecStmt: + children = append(children, + tok(n.TokPos, len(n.Tok.String()))) + + case *ast.IndexExpr: + children = append(children, + tok(n.Lbrack, len("{")), + tok(n.Rbrack, len("}"))) + + case *ast.InterfaceType: + children = append(children, + tok(n.Interface, len("interface"))) + + case *ast.KeyValueExpr: + children = append(children, + tok(n.Colon, len(":"))) + + case *ast.LabeledStmt: + children = append(children, + tok(n.Colon, len(":"))) + + case *ast.MapType: + children = append(children, + tok(n.Map, len("map"))) + + case *ast.ParenExpr: + children = append(children, + tok(n.Lparen, len("(")), + tok(n.Rparen, len(")"))) + + case *ast.RangeStmt: + children = append(children, + tok(n.For, len("for")), + tok(n.TokPos, len(n.Tok.String()))) + + case *ast.ReturnStmt: + children = append(children, + tok(n.Return, len("return"))) + + case *ast.SelectStmt: + children = append(children, + tok(n.Select, len("select"))) + + case *ast.SelectorExpr: + // nop + + case *ast.SendStmt: + children = append(children, + tok(n.Arrow, len("<-"))) + + case *ast.SliceExpr: + children = append(children, + tok(n.Lbrack, len("[")), + tok(n.Rbrack, len("]"))) + + case *ast.StarExpr: + children = append(children, tok(n.Star, len("*"))) + + case *ast.StructType: + children = append(children, tok(n.Struct, len("struct"))) + + case *ast.SwitchStmt: + children = append(children, tok(n.Switch, len("switch"))) + + case *ast.TypeAssertExpr: + children = append(children, + tok(n.Lparen-1, len(".")), + tok(n.Lparen, len("(")), + tok(n.Rparen, len(")"))) + + case *ast.TypeSpec: + // TODO(adonovan): TypeSpec.{Doc,Comment}? + + case *ast.TypeSwitchStmt: + children = append(children, tok(n.Switch, len("switch"))) + + case *ast.UnaryExpr: + children = append(children, tok(n.OpPos, len(n.Op.String()))) + + case *ast.ValueSpec: + // TODO(adonovan): ValueSpec.{Doc,Comment}? + + default: + // Includes *ast.BadDecl, *ast.BadExpr, *ast.BadStmt. + panic(fmt.Sprintf("unexpected node type %T", n)) + } + + // TODO(adonovan): opt: merge the logic of ast.Inspect() into + // the switch above so we can make interleaved callbacks for + // both Nodes and Tokens in the right order and avoid the need + // to sort. + sort.Sort(byPos(children)) + + return children +} + +type byPos []ast.Node + +func (sl byPos) Len() int { + return len(sl) +} +func (sl byPos) Less(i, j int) bool { + return sl[i].Pos() < sl[j].Pos() +} +func (sl byPos) Swap(i, j int) { + sl[i], sl[j] = sl[j], sl[i] +} + +// NodeDescription returns a description of the concrete type of n suitable +// for a user interface. +// +// TODO(adonovan): in some cases (e.g. Field, FieldList, Ident, +// StarExpr) we could be much more specific given the path to the AST +// root. Perhaps we should do that. +// +func NodeDescription(n ast.Node) string { + switch n := n.(type) { + case *ast.ArrayType: + return "array type" + case *ast.AssignStmt: + return "assignment" + case *ast.BadDecl: + return "bad declaration" + case *ast.BadExpr: + return "bad expression" + case *ast.BadStmt: + return "bad statement" + case *ast.BasicLit: + return "basic literal" + case *ast.BinaryExpr: + return fmt.Sprintf("binary %s operation", n.Op) + case *ast.BlockStmt: + return "block" + case *ast.BranchStmt: + switch n.Tok { + case token.BREAK: + return "break statement" + case token.CONTINUE: + return "continue statement" + case token.GOTO: + return "goto statement" + case token.FALLTHROUGH: + return "fall-through statement" + } + case *ast.CallExpr: + return "function call (or conversion)" + case *ast.CaseClause: + return "case clause" + case *ast.ChanType: + return "channel type" + case *ast.CommClause: + return "communication clause" + case *ast.Comment: + return "comment" + case *ast.CommentGroup: + return "comment group" + case *ast.CompositeLit: + return "composite literal" + case *ast.DeclStmt: + return NodeDescription(n.Decl) + " statement" + case *ast.DeferStmt: + return "defer statement" + case *ast.Ellipsis: + return "ellipsis" + case *ast.EmptyStmt: + return "empty statement" + case *ast.ExprStmt: + return "expression statement" + case *ast.Field: + // Can be any of these: + // struct {x, y int} -- struct field(s) + // struct {T} -- anon struct field + // interface {I} -- interface embedding + // interface {f()} -- interface method + // func (A) func(B) C -- receiver, param(s), result(s) + return "field/method/parameter" + case *ast.FieldList: + return "field/method/parameter list" + case *ast.File: + return "source file" + case *ast.ForStmt: + return "for loop" + case *ast.FuncDecl: + return "function declaration" + case *ast.FuncLit: + return "function literal" + case *ast.FuncType: + return "function type" + case *ast.GenDecl: + switch n.Tok { + case token.IMPORT: + return "import declaration" + case token.CONST: + return "constant declaration" + case token.TYPE: + return "type declaration" + case token.VAR: + return "variable declaration" + } + case *ast.GoStmt: + return "go statement" + case *ast.Ident: + return "identifier" + case *ast.IfStmt: + return "if statement" + case *ast.ImportSpec: + return "import specification" + case *ast.IncDecStmt: + if n.Tok == token.INC { + return "increment statement" + } + return "decrement statement" + case *ast.IndexExpr: + return "index expression" + case *ast.InterfaceType: + return "interface type" + case *ast.KeyValueExpr: + return "key/value association" + case *ast.LabeledStmt: + return "statement label" + case *ast.MapType: + return "map type" + case *ast.Package: + return "package" + case *ast.ParenExpr: + return "parenthesized " + NodeDescription(n.X) + case *ast.RangeStmt: + return "range loop" + case *ast.ReturnStmt: + return "return statement" + case *ast.SelectStmt: + return "select statement" + case *ast.SelectorExpr: + return "selector" + case *ast.SendStmt: + return "channel send" + case *ast.SliceExpr: + return "slice expression" + case *ast.StarExpr: + return "*-operation" // load/store expr or pointer type + case *ast.StructType: + return "struct type" + case *ast.SwitchStmt: + return "switch statement" + case *ast.TypeAssertExpr: + return "type assertion" + case *ast.TypeSpec: + return "type specification" + case *ast.TypeSwitchStmt: + return "type switch" + case *ast.UnaryExpr: + return fmt.Sprintf("unary %s operation", n.Op) + case *ast.ValueSpec: + return "value specification" + + } + panic(fmt.Sprintf("unexpected node type: %T", n)) +} diff --git a/vendor/golang.org/x/tools/go/ast/astutil/imports.go b/vendor/golang.org/x/tools/go/ast/astutil/imports.go new file mode 100644 index 0000000..7f9b162 --- /dev/null +++ b/vendor/golang.org/x/tools/go/ast/astutil/imports.go @@ -0,0 +1,359 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package astutil contains common utilities for working with the Go AST. +package astutil // import "golang.org/x/tools/go/ast/astutil" + +import ( + "fmt" + "go/ast" + "go/token" + "strconv" + "strings" +) + +// AddImport adds the import path to the file f, if absent. +func AddImport(fset *token.FileSet, f *ast.File, ipath string) (added bool) { + return AddNamedImport(fset, f, "", ipath) +} + +// AddNamedImport adds the import path to the file f, if absent. +// If name is not empty, it is used to rename the import. +// +// For example, calling +// AddNamedImport(fset, f, "pathpkg", "path") +// adds +// import pathpkg "path" +func AddNamedImport(fset *token.FileSet, f *ast.File, name, ipath string) (added bool) { + if imports(f, ipath) { + return false + } + + newImport := &ast.ImportSpec{ + Path: &ast.BasicLit{ + Kind: token.STRING, + Value: strconv.Quote(ipath), + }, + } + if name != "" { + newImport.Name = &ast.Ident{Name: name} + } + + // Find an import decl to add to. + // The goal is to find an existing import + // whose import path has the longest shared + // prefix with ipath. + var ( + bestMatch = -1 // length of longest shared prefix + lastImport = -1 // index in f.Decls of the file's final import decl + impDecl *ast.GenDecl // import decl containing the best match + impIndex = -1 // spec index in impDecl containing the best match + ) + for i, decl := range f.Decls { + gen, ok := decl.(*ast.GenDecl) + if ok && gen.Tok == token.IMPORT { + lastImport = i + // Do not add to import "C", to avoid disrupting the + // association with its doc comment, breaking cgo. + if declImports(gen, "C") { + continue + } + + // Match an empty import decl if that's all that is available. + if len(gen.Specs) == 0 && bestMatch == -1 { + impDecl = gen + } + + // Compute longest shared prefix with imports in this group. + for j, spec := range gen.Specs { + impspec := spec.(*ast.ImportSpec) + n := matchLen(importPath(impspec), ipath) + if n > bestMatch { + bestMatch = n + impDecl = gen + impIndex = j + } + } + } + } + + // If no import decl found, add one after the last import. + if impDecl == nil { + impDecl = &ast.GenDecl{ + Tok: token.IMPORT, + } + if lastImport >= 0 { + impDecl.TokPos = f.Decls[lastImport].End() + } else { + // There are no existing imports. + // Our new import goes after the package declaration and after + // the comment, if any, that starts on the same line as the + // package declaration. + impDecl.TokPos = f.Package + + file := fset.File(f.Package) + pkgLine := file.Line(f.Package) + for _, c := range f.Comments { + if file.Line(c.Pos()) > pkgLine { + break + } + impDecl.TokPos = c.End() + } + } + f.Decls = append(f.Decls, nil) + copy(f.Decls[lastImport+2:], f.Decls[lastImport+1:]) + f.Decls[lastImport+1] = impDecl + } + + // Insert new import at insertAt. + insertAt := 0 + if impIndex >= 0 { + // insert after the found import + insertAt = impIndex + 1 + } + impDecl.Specs = append(impDecl.Specs, nil) + copy(impDecl.Specs[insertAt+1:], impDecl.Specs[insertAt:]) + impDecl.Specs[insertAt] = newImport + pos := impDecl.Pos() + if insertAt > 0 { + // Assign same position as the previous import, + // so that the sorter sees it as being in the same block. + pos = impDecl.Specs[insertAt-1].Pos() + } + if newImport.Name != nil { + newImport.Name.NamePos = pos + } + newImport.Path.ValuePos = pos + newImport.EndPos = pos + + // Clean up parens. impDecl contains at least one spec. + if len(impDecl.Specs) == 1 { + // Remove unneeded parens. + impDecl.Lparen = token.NoPos + } else if !impDecl.Lparen.IsValid() { + // impDecl needs parens added. + impDecl.Lparen = impDecl.Specs[0].Pos() + } + + f.Imports = append(f.Imports, newImport) + return true +} + +// DeleteImport deletes the import path from the file f, if present. +func DeleteImport(fset *token.FileSet, f *ast.File, path string) (deleted bool) { + var delspecs []*ast.ImportSpec + + // Find the import nodes that import path, if any. + for i := 0; i < len(f.Decls); i++ { + decl := f.Decls[i] + gen, ok := decl.(*ast.GenDecl) + if !ok || gen.Tok != token.IMPORT { + continue + } + for j := 0; j < len(gen.Specs); j++ { + spec := gen.Specs[j] + impspec := spec.(*ast.ImportSpec) + if importPath(impspec) != path { + continue + } + + // We found an import spec that imports path. + // Delete it. + delspecs = append(delspecs, impspec) + deleted = true + copy(gen.Specs[j:], gen.Specs[j+1:]) + gen.Specs = gen.Specs[:len(gen.Specs)-1] + + // If this was the last import spec in this decl, + // delete the decl, too. + if len(gen.Specs) == 0 { + copy(f.Decls[i:], f.Decls[i+1:]) + f.Decls = f.Decls[:len(f.Decls)-1] + i-- + break + } else if len(gen.Specs) == 1 { + gen.Lparen = token.NoPos // drop parens + } + if j > 0 { + lastImpspec := gen.Specs[j-1].(*ast.ImportSpec) + lastLine := fset.Position(lastImpspec.Path.ValuePos).Line + line := fset.Position(impspec.Path.ValuePos).Line + + // We deleted an entry but now there may be + // a blank line-sized hole where the import was. + if line-lastLine > 1 { + // There was a blank line immediately preceding the deleted import, + // so there's no need to close the hole. + // Do nothing. + } else { + // There was no blank line. Close the hole. + fset.File(gen.Rparen).MergeLine(line) + } + } + j-- + } + } + + // Delete them from f.Imports. + for i := 0; i < len(f.Imports); i++ { + imp := f.Imports[i] + for j, del := range delspecs { + if imp == del { + copy(f.Imports[i:], f.Imports[i+1:]) + f.Imports = f.Imports[:len(f.Imports)-1] + copy(delspecs[j:], delspecs[j+1:]) + delspecs = delspecs[:len(delspecs)-1] + i-- + break + } + } + } + + if len(delspecs) > 0 { + panic(fmt.Sprintf("deleted specs from Decls but not Imports: %v", delspecs)) + } + + return +} + +// RewriteImport rewrites any import of path oldPath to path newPath. +func RewriteImport(fset *token.FileSet, f *ast.File, oldPath, newPath string) (rewrote bool) { + for _, imp := range f.Imports { + if importPath(imp) == oldPath { + rewrote = true + // record old End, because the default is to compute + // it using the length of imp.Path.Value. + imp.EndPos = imp.End() + imp.Path.Value = strconv.Quote(newPath) + } + } + return +} + +// UsesImport reports whether a given import is used. +func UsesImport(f *ast.File, path string) (used bool) { + spec := importSpec(f, path) + if spec == nil { + return + } + + name := spec.Name.String() + switch name { + case "": + // If the package name is not explicitly specified, + // make an educated guess. This is not guaranteed to be correct. + lastSlash := strings.LastIndex(path, "/") + if lastSlash == -1 { + name = path + } else { + name = path[lastSlash+1:] + } + case "_", ".": + // Not sure if this import is used - err on the side of caution. + return true + } + + ast.Walk(visitFn(func(n ast.Node) { + sel, ok := n.(*ast.SelectorExpr) + if ok && isTopName(sel.X, name) { + used = true + } + }), f) + + return +} + +type visitFn func(node ast.Node) + +func (fn visitFn) Visit(node ast.Node) ast.Visitor { + fn(node) + return fn +} + +// imports returns true if f imports path. +func imports(f *ast.File, path string) bool { + return importSpec(f, path) != nil +} + +// importSpec returns the import spec if f imports path, +// or nil otherwise. +func importSpec(f *ast.File, path string) *ast.ImportSpec { + for _, s := range f.Imports { + if importPath(s) == path { + return s + } + } + return nil +} + +// importPath returns the unquoted import path of s, +// or "" if the path is not properly quoted. +func importPath(s *ast.ImportSpec) string { + t, err := strconv.Unquote(s.Path.Value) + if err == nil { + return t + } + return "" +} + +// declImports reports whether gen contains an import of path. +func declImports(gen *ast.GenDecl, path string) bool { + if gen.Tok != token.IMPORT { + return false + } + for _, spec := range gen.Specs { + impspec := spec.(*ast.ImportSpec) + if importPath(impspec) == path { + return true + } + } + return false +} + +// matchLen returns the length of the longest path segment prefix shared by x and y. +func matchLen(x, y string) int { + n := 0 + for i := 0; i < len(x) && i < len(y) && x[i] == y[i]; i++ { + if x[i] == '/' { + n++ + } + } + return n +} + +// isTopName returns true if n is a top-level unresolved identifier with the given name. +func isTopName(n ast.Expr, name string) bool { + id, ok := n.(*ast.Ident) + return ok && id.Name == name && id.Obj == nil +} + +// Imports returns the file imports grouped by paragraph. +func Imports(fset *token.FileSet, f *ast.File) [][]*ast.ImportSpec { + var groups [][]*ast.ImportSpec + + for _, decl := range f.Decls { + genDecl, ok := decl.(*ast.GenDecl) + if !ok || genDecl.Tok != token.IMPORT { + break + } + + group := []*ast.ImportSpec{} + + var lastLine int + for _, spec := range genDecl.Specs { + importSpec := spec.(*ast.ImportSpec) + pos := importSpec.Path.ValuePos + line := fset.Position(pos).Line + if lastLine > 0 && pos > 0 && line-lastLine > 1 { + groups = append(groups, group) + group = []*ast.ImportSpec{} + } + group = append(group, importSpec) + lastLine = line + } + groups = append(groups, group) + } + + return groups +} diff --git a/vendor/golang.org/x/tools/go/ast/astutil/util.go b/vendor/golang.org/x/tools/go/ast/astutil/util.go new file mode 100644 index 0000000..7630629 --- /dev/null +++ b/vendor/golang.org/x/tools/go/ast/astutil/util.go @@ -0,0 +1,14 @@ +package astutil + +import "go/ast" + +// Unparen returns e with any enclosing parentheses stripped. +func Unparen(e ast.Expr) ast.Expr { + for { + p, ok := e.(*ast.ParenExpr) + if !ok { + return e + } + e = p.X + } +} diff --git a/vendor/golang.org/x/tools/go/buildutil/allpackages.go b/vendor/golang.org/x/tools/go/buildutil/allpackages.go new file mode 100644 index 0000000..0f909ee --- /dev/null +++ b/vendor/golang.org/x/tools/go/buildutil/allpackages.go @@ -0,0 +1,123 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package buildutil provides utilities related to the go/build +// package in the standard library. +// +// All I/O is done via the build.Context file system interface, which must +// be concurrency-safe. +package buildutil // import "golang.org/x/tools/go/buildutil" + +import ( + "go/build" + "os" + "path/filepath" + "sort" + "strings" + "sync" +) + +// AllPackages returns the import path of each Go package in any source +// directory of the specified build context (e.g. $GOROOT or an element +// of $GOPATH). Errors are ignored. The results are sorted. +// +// The result may include import paths for directories that contain no +// *.go files, such as "archive" (in $GOROOT/src). +// +// All I/O is done via the build.Context file system interface, +// which must be concurrency-safe. +// +func AllPackages(ctxt *build.Context) []string { + var list []string + ForEachPackage(ctxt, func(pkg string, _ error) { + list = append(list, pkg) + }) + sort.Strings(list) + return list +} + +// ForEachPackage calls the found function with the import path of +// each Go package it finds in any source directory of the specified +// build context (e.g. $GOROOT or an element of $GOPATH). +// +// If the package directory exists but could not be read, the second +// argument to the found function provides the error. +// +// All I/O is done via the build.Context file system interface, +// which must be concurrency-safe. +// +func ForEachPackage(ctxt *build.Context, found func(importPath string, err error)) { + // We use a counting semaphore to limit + // the number of parallel calls to ReadDir. + sema := make(chan bool, 20) + + ch := make(chan item) + + var wg sync.WaitGroup + for _, root := range ctxt.SrcDirs() { + root := root + wg.Add(1) + go func() { + allPackages(ctxt, sema, root, ch) + wg.Done() + }() + } + go func() { + wg.Wait() + close(ch) + }() + + // All calls to found occur in the caller's goroutine. + for i := range ch { + found(i.importPath, i.err) + } +} + +type item struct { + importPath string + err error // (optional) +} + +func allPackages(ctxt *build.Context, sema chan bool, root string, ch chan<- item) { + root = filepath.Clean(root) + string(os.PathSeparator) + + var wg sync.WaitGroup + + var walkDir func(dir string) + walkDir = func(dir string) { + // Avoid .foo, _foo, and testdata directory trees. + base := filepath.Base(dir) + if base == "" || base[0] == '.' || base[0] == '_' || base == "testdata" { + return + } + + pkg := filepath.ToSlash(strings.TrimPrefix(dir, root)) + + // Prune search if we encounter any of these import paths. + switch pkg { + case "builtin": + return + } + + sema <- true + files, err := ReadDir(ctxt, dir) + <-sema + if pkg != "" || err != nil { + ch <- item{pkg, err} + } + for _, fi := range files { + fi := fi + if fi.IsDir() { + wg.Add(1) + go func() { + walkDir(filepath.Join(dir, fi.Name())) + wg.Done() + }() + } + } + } + + walkDir(root) + wg.Wait() +} diff --git a/vendor/golang.org/x/tools/go/buildutil/fakecontext.go b/vendor/golang.org/x/tools/go/buildutil/fakecontext.go new file mode 100644 index 0000000..24cbcbe --- /dev/null +++ b/vendor/golang.org/x/tools/go/buildutil/fakecontext.go @@ -0,0 +1,108 @@ +package buildutil + +import ( + "fmt" + "go/build" + "io" + "io/ioutil" + "os" + "path" + "path/filepath" + "sort" + "strings" + "time" +) + +// FakeContext returns a build.Context for the fake file tree specified +// by pkgs, which maps package import paths to a mapping from file base +// names to contents. +// +// The fake Context has a GOROOT of "/go" and no GOPATH, and overrides +// the necessary file access methods to read from memory instead of the +// real file system. +// +// Unlike a real file tree, the fake one has only two levels---packages +// and files---so ReadDir("/go/src/") returns all packages under +// /go/src/ including, for instance, "math" and "math/big". +// ReadDir("/go/src/math/big") would return all the files in the +// "math/big" package. +// +func FakeContext(pkgs map[string]map[string]string) *build.Context { + clean := func(filename string) string { + f := path.Clean(filepath.ToSlash(filename)) + // Removing "/go/src" while respecting segment + // boundaries has this unfortunate corner case: + if f == "/go/src" { + return "" + } + return strings.TrimPrefix(f, "/go/src/") + } + + ctxt := build.Default // copy + ctxt.GOROOT = "/go" + ctxt.GOPATH = "" + ctxt.IsDir = func(dir string) bool { + dir = clean(dir) + if dir == "" { + return true // needed by (*build.Context).SrcDirs + } + return pkgs[dir] != nil + } + ctxt.ReadDir = func(dir string) ([]os.FileInfo, error) { + dir = clean(dir) + var fis []os.FileInfo + if dir == "" { + // enumerate packages + for importPath := range pkgs { + fis = append(fis, fakeDirInfo(importPath)) + } + } else { + // enumerate files of package + for basename := range pkgs[dir] { + fis = append(fis, fakeFileInfo(basename)) + } + } + sort.Sort(byName(fis)) + return fis, nil + } + ctxt.OpenFile = func(filename string) (io.ReadCloser, error) { + filename = clean(filename) + dir, base := path.Split(filename) + content, ok := pkgs[path.Clean(dir)][base] + if !ok { + return nil, fmt.Errorf("file not found: %s", filename) + } + return ioutil.NopCloser(strings.NewReader(content)), nil + } + ctxt.IsAbsPath = func(path string) bool { + path = filepath.ToSlash(path) + // Don't rely on the default (filepath.Path) since on + // Windows, it reports virtual paths as non-absolute. + return strings.HasPrefix(path, "/") + } + return &ctxt +} + +type byName []os.FileInfo + +func (s byName) Len() int { return len(s) } +func (s byName) Swap(i, j int) { s[i], s[j] = s[j], s[i] } +func (s byName) Less(i, j int) bool { return s[i].Name() < s[j].Name() } + +type fakeFileInfo string + +func (fi fakeFileInfo) Name() string { return string(fi) } +func (fakeFileInfo) Sys() interface{} { return nil } +func (fakeFileInfo) ModTime() time.Time { return time.Time{} } +func (fakeFileInfo) IsDir() bool { return false } +func (fakeFileInfo) Size() int64 { return 0 } +func (fakeFileInfo) Mode() os.FileMode { return 0644 } + +type fakeDirInfo string + +func (fd fakeDirInfo) Name() string { return string(fd) } +func (fakeDirInfo) Sys() interface{} { return nil } +func (fakeDirInfo) ModTime() time.Time { return time.Time{} } +func (fakeDirInfo) IsDir() bool { return true } +func (fakeDirInfo) Size() int64 { return 0 } +func (fakeDirInfo) Mode() os.FileMode { return 0755 } diff --git a/vendor/golang.org/x/tools/go/buildutil/tags.go b/vendor/golang.org/x/tools/go/buildutil/tags.go new file mode 100644 index 0000000..9735094 --- /dev/null +++ b/vendor/golang.org/x/tools/go/buildutil/tags.go @@ -0,0 +1,73 @@ +package buildutil + +// This logic was copied from stringsFlag from $GOROOT/src/cmd/go/build.go. + +import "fmt" + +const TagsFlagDoc = "a list of `build tags` to consider satisfied during the build. " + + "For more information about build tags, see the description of " + + "build constraints in the documentation for the go/build package" + +// TagsFlag is an implementation of the flag.Value interface that parses +// a flag value in the same manner as go build's -tags flag and +// populates a []string slice. +// +// See $GOROOT/src/go/build/doc.go for description of build tags. +// See $GOROOT/src/cmd/go/doc.go for description of 'go build -tags' flag. +// +// Example: +// flag.Var((*buildutil.TagsFlag)(&build.Default.BuildTags), "tags", buildutil.TagsDoc) +type TagsFlag []string + +func (v *TagsFlag) Set(s string) error { + var err error + *v, err = splitQuotedFields(s) + if *v == nil { + *v = []string{} + } + return err +} + +func splitQuotedFields(s string) ([]string, error) { + // Split fields allowing '' or "" around elements. + // Quotes further inside the string do not count. + var f []string + for len(s) > 0 { + for len(s) > 0 && isSpaceByte(s[0]) { + s = s[1:] + } + if len(s) == 0 { + break + } + // Accepted quoted string. No unescaping inside. + if s[0] == '"' || s[0] == '\'' { + quote := s[0] + s = s[1:] + i := 0 + for i < len(s) && s[i] != quote { + i++ + } + if i >= len(s) { + return nil, fmt.Errorf("unterminated %c string", quote) + } + f = append(f, s[:i]) + s = s[i+1:] + continue + } + i := 0 + for i < len(s) && !isSpaceByte(s[i]) { + i++ + } + f = append(f, s[:i]) + s = s[i:] + } + return f, nil +} + +func (v *TagsFlag) String() string { + return "" +} + +func isSpaceByte(c byte) bool { + return c == ' ' || c == '\t' || c == '\n' || c == '\r' +} diff --git a/vendor/golang.org/x/tools/go/buildutil/util.go b/vendor/golang.org/x/tools/go/buildutil/util.go new file mode 100644 index 0000000..60eeae2 --- /dev/null +++ b/vendor/golang.org/x/tools/go/buildutil/util.go @@ -0,0 +1,158 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package buildutil + +import ( + "fmt" + "go/ast" + "go/build" + "go/parser" + "go/token" + "io" + "io/ioutil" + "os" + "path" + "path/filepath" + "strings" +) + +// ParseFile behaves like parser.ParseFile, +// but uses the build context's file system interface, if any. +// +// If file is not absolute (as defined by IsAbsPath), the (dir, file) +// components are joined using JoinPath; dir must be absolute. +// +// The displayPath function, if provided, is used to transform the +// filename that will be attached to the ASTs. +// +// TODO(adonovan): call this from go/loader.parseFiles when the tree thaws. +// +func ParseFile(fset *token.FileSet, ctxt *build.Context, displayPath func(string) string, dir string, file string, mode parser.Mode) (*ast.File, error) { + if !IsAbsPath(ctxt, file) { + file = JoinPath(ctxt, dir, file) + } + rd, err := OpenFile(ctxt, file) + if err != nil { + return nil, err + } + defer rd.Close() // ignore error + if displayPath != nil { + file = displayPath(file) + } + return parser.ParseFile(fset, file, rd, mode) +} + +// ContainingPackage returns the package containing filename. +// +// If filename is not absolute, it is interpreted relative to working directory dir. +// All I/O is via the build context's file system interface, if any. +// +// The '...Files []string' fields of the resulting build.Package are not +// populated (build.FindOnly mode). +// +// TODO(adonovan): call this from oracle when the tree thaws. +// +func ContainingPackage(ctxt *build.Context, dir, filename string) (*build.Package, error) { + if !IsAbsPath(ctxt, filename) { + filename = JoinPath(ctxt, dir, filename) + } + + // We must not assume the file tree uses + // "/" always, + // `\` always, + // or os.PathSeparator (which varies by platform), + // but to make any progress, we are forced to assume that + // paths will not use `\` unless the PathSeparator + // is also `\`, thus we can rely on filepath.ToSlash for some sanity. + + dirSlash := path.Dir(filepath.ToSlash(filename)) + "/" + + // We assume that no source root (GOPATH[i] or GOROOT) contains any other. + for _, srcdir := range ctxt.SrcDirs() { + srcdirSlash := filepath.ToSlash(srcdir) + "/" + if strings.HasPrefix(dirSlash, srcdirSlash) { + importPath := dirSlash[len(srcdirSlash) : len(dirSlash)-len("/")] + return ctxt.Import(importPath, dir, build.FindOnly) + } + } + + return nil, fmt.Errorf("can't find package containing %s", filename) +} + +// -- Effective methods of file system interface ------------------------- + +// (go/build.Context defines these as methods, but does not export them.) + +// TODO(adonovan): HasSubdir? + +// FileExists returns true if the specified file exists, +// using the build context's file system interface. +func FileExists(ctxt *build.Context, path string) bool { + if ctxt.OpenFile != nil { + r, err := ctxt.OpenFile(path) + if err != nil { + return false + } + r.Close() // ignore error + return true + } + _, err := os.Stat(path) + return err == nil +} + +// OpenFile behaves like os.Open, +// but uses the build context's file system interface, if any. +func OpenFile(ctxt *build.Context, path string) (io.ReadCloser, error) { + if ctxt.OpenFile != nil { + return ctxt.OpenFile(path) + } + return os.Open(path) +} + +// IsAbsPath behaves like filepath.IsAbs, +// but uses the build context's file system interface, if any. +func IsAbsPath(ctxt *build.Context, path string) bool { + if ctxt.IsAbsPath != nil { + return ctxt.IsAbsPath(path) + } + return filepath.IsAbs(path) +} + +// JoinPath behaves like filepath.Join, +// but uses the build context's file system interface, if any. +func JoinPath(ctxt *build.Context, path ...string) string { + if ctxt.JoinPath != nil { + return ctxt.JoinPath(path...) + } + return filepath.Join(path...) +} + +// IsDir behaves like os.Stat plus IsDir, +// but uses the build context's file system interface, if any. +func IsDir(ctxt *build.Context, path string) bool { + if ctxt.IsDir != nil { + return ctxt.IsDir(path) + } + fi, err := os.Stat(path) + return err == nil && fi.IsDir() +} + +// ReadDir behaves like ioutil.ReadDir, +// but uses the build context's file system interface, if any. +func ReadDir(ctxt *build.Context, path string) ([]os.FileInfo, error) { + if ctxt.ReadDir != nil { + return ctxt.ReadDir(path) + } + return ioutil.ReadDir(path) +} + +// SplitPathList behaves like filepath.SplitList, +// but uses the build context's file system interface, if any. +func SplitPathList(ctxt *build.Context, s string) []string { + if ctxt.SplitPathList != nil { + return ctxt.SplitPathList(s) + } + return filepath.SplitList(s) +} diff --git a/vendor/golang.org/x/tools/go/callgraph/callgraph.go b/vendor/golang.org/x/tools/go/callgraph/callgraph.go new file mode 100644 index 0000000..707a319 --- /dev/null +++ b/vendor/golang.org/x/tools/go/callgraph/callgraph.go @@ -0,0 +1,129 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +/* + +Package callgraph defines the call graph and various algorithms +and utilities to operate on it. + +A call graph is a labelled directed graph whose nodes represent +functions and whose edge labels represent syntactic function call +sites. The presence of a labelled edge (caller, site, callee) +indicates that caller may call callee at the specified call site. + +A call graph is a multigraph: it may contain multiple edges (caller, +*, callee) connecting the same pair of nodes, so long as the edges +differ by label; this occurs when one function calls another function +from multiple call sites. Also, it may contain multiple edges +(caller, site, *) that differ only by callee; this indicates a +polymorphic call. + +A SOUND call graph is one that overapproximates the dynamic calling +behaviors of the program in all possible executions. One call graph +is more PRECISE than another if it is a smaller overapproximation of +the dynamic behavior. + +All call graphs have a synthetic root node which is responsible for +calling main() and init(). + +Calls to built-in functions (e.g. panic, println) are not represented +in the call graph; they are treated like built-in operators of the +language. + +*/ +package callgraph // import "golang.org/x/tools/go/callgraph" + +// TODO(adonovan): add a function to eliminate wrappers from the +// callgraph, preserving topology. +// More generally, we could eliminate "uninteresting" nodes such as +// nodes from packages we don't care about. + +import ( + "fmt" + "go/token" + + "golang.org/x/tools/go/ssa" +) + +// A Graph represents a call graph. +// +// A graph may contain nodes that are not reachable from the root. +// If the call graph is sound, such nodes indicate unreachable +// functions. +// +type Graph struct { + Root *Node // the distinguished root node + Nodes map[*ssa.Function]*Node // all nodes by function +} + +// New returns a new Graph with the specified root node. +func New(root *ssa.Function) *Graph { + g := &Graph{Nodes: make(map[*ssa.Function]*Node)} + g.Root = g.CreateNode(root) + return g +} + +// CreateNode returns the Node for fn, creating it if not present. +func (g *Graph) CreateNode(fn *ssa.Function) *Node { + n, ok := g.Nodes[fn] + if !ok { + n = &Node{Func: fn, ID: len(g.Nodes)} + g.Nodes[fn] = n + } + return n +} + +// A Node represents a node in a call graph. +type Node struct { + Func *ssa.Function // the function this node represents + ID int // 0-based sequence number + In []*Edge // unordered set of incoming call edges (n.In[*].Callee == n) + Out []*Edge // unordered set of outgoing call edges (n.Out[*].Caller == n) +} + +func (n *Node) String() string { + return fmt.Sprintf("n%d:%s", n.ID, n.Func) +} + +// A Edge represents an edge in the call graph. +// +// Site is nil for edges originating in synthetic or intrinsic +// functions, e.g. reflect.Call or the root of the call graph. +type Edge struct { + Caller *Node + Site ssa.CallInstruction + Callee *Node +} + +func (e Edge) String() string { + return fmt.Sprintf("%s --> %s", e.Caller, e.Callee) +} + +func (e Edge) Description() string { + var prefix string + switch e.Site.(type) { + case nil: + return "synthetic call" + case *ssa.Go: + prefix = "concurrent " + case *ssa.Defer: + prefix = "deferred " + } + return prefix + e.Site.Common().Description() +} + +func (e Edge) Pos() token.Pos { + if e.Site == nil { + return token.NoPos + } + return e.Site.Pos() +} + +// AddEdge adds the edge (caller, site, callee) to the call graph. +// Elimination of duplicate edges is the caller's responsibility. +func AddEdge(caller *Node, site ssa.CallInstruction, callee *Node) { + e := &Edge{caller, site, callee} + callee.In = append(callee.In, e) + caller.Out = append(caller.Out, e) +} diff --git a/vendor/golang.org/x/tools/go/callgraph/util.go b/vendor/golang.org/x/tools/go/callgraph/util.go new file mode 100644 index 0000000..a8f8903 --- /dev/null +++ b/vendor/golang.org/x/tools/go/callgraph/util.go @@ -0,0 +1,181 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package callgraph + +import "golang.org/x/tools/go/ssa" + +// This file provides various utilities over call graphs, such as +// visitation and path search. + +// CalleesOf returns a new set containing all direct callees of the +// caller node. +// +func CalleesOf(caller *Node) map[*Node]bool { + callees := make(map[*Node]bool) + for _, e := range caller.Out { + callees[e.Callee] = true + } + return callees +} + +// GraphVisitEdges visits all the edges in graph g in depth-first order. +// The edge function is called for each edge in postorder. If it +// returns non-nil, visitation stops and GraphVisitEdges returns that +// value. +// +func GraphVisitEdges(g *Graph, edge func(*Edge) error) error { + seen := make(map[*Node]bool) + var visit func(n *Node) error + visit = func(n *Node) error { + if !seen[n] { + seen[n] = true + for _, e := range n.Out { + if err := visit(e.Callee); err != nil { + return err + } + if err := edge(e); err != nil { + return err + } + } + } + return nil + } + for _, n := range g.Nodes { + if err := visit(n); err != nil { + return err + } + } + return nil +} + +// PathSearch finds an arbitrary path starting at node start and +// ending at some node for which isEnd() returns true. On success, +// PathSearch returns the path as an ordered list of edges; on +// failure, it returns nil. +// +func PathSearch(start *Node, isEnd func(*Node) bool) []*Edge { + stack := make([]*Edge, 0, 32) + seen := make(map[*Node]bool) + var search func(n *Node) []*Edge + search = func(n *Node) []*Edge { + if !seen[n] { + seen[n] = true + if isEnd(n) { + return stack + } + for _, e := range n.Out { + stack = append(stack, e) // push + if found := search(e.Callee); found != nil { + return found + } + stack = stack[:len(stack)-1] // pop + } + } + return nil + } + return search(start) +} + +// DeleteSyntheticNodes removes from call graph g all nodes for +// synthetic functions (except g.Root and package initializers), +// preserving the topology. In effect, calls to synthetic wrappers +// are "inlined". +// +func (g *Graph) DeleteSyntheticNodes() { + // Measurements on the standard library and go.tools show that + // resulting graph has ~15% fewer nodes and 4-8% fewer edges + // than the input. + // + // Inlining a wrapper of in-degree m, out-degree n adds m*n + // and removes m+n edges. Since most wrappers are monomorphic + // (n=1) this results in a slight reduction. Polymorphic + // wrappers (n>1), e.g. from embedding an interface value + // inside a struct to satisfy some interface, cause an + // increase in the graph, but they seem to be uncommon. + + // Hash all existing edges to avoid creating duplicates. + edges := make(map[Edge]bool) + for _, cgn := range g.Nodes { + for _, e := range cgn.Out { + edges[*e] = true + } + } + for fn, cgn := range g.Nodes { + if cgn == g.Root || fn.Synthetic == "" || isInit(cgn.Func) { + continue // keep + } + for _, eIn := range cgn.In { + for _, eOut := range cgn.Out { + newEdge := Edge{eIn.Caller, eIn.Site, eOut.Callee} + if edges[newEdge] { + continue // don't add duplicate + } + AddEdge(eIn.Caller, eIn.Site, eOut.Callee) + edges[newEdge] = true + } + } + g.DeleteNode(cgn) + } +} + +func isInit(fn *ssa.Function) bool { + return fn.Pkg != nil && fn.Pkg.Func("init") == fn +} + +// DeleteNode removes node n and its edges from the graph g. +// (NB: not efficient for batch deletion.) +func (g *Graph) DeleteNode(n *Node) { + n.deleteIns() + n.deleteOuts() + delete(g.Nodes, n.Func) +} + +// deleteIns deletes all incoming edges to n. +func (n *Node) deleteIns() { + for _, e := range n.In { + removeOutEdge(e) + } + n.In = nil +} + +// deleteOuts deletes all outgoing edges from n. +func (n *Node) deleteOuts() { + for _, e := range n.Out { + removeInEdge(e) + } + n.Out = nil +} + +// removeOutEdge removes edge.Caller's outgoing edge 'edge'. +func removeOutEdge(edge *Edge) { + caller := edge.Caller + n := len(caller.Out) + for i, e := range caller.Out { + if e == edge { + // Replace it with the final element and shrink the slice. + caller.Out[i] = caller.Out[n-1] + caller.Out[n-1] = nil // aid GC + caller.Out = caller.Out[:n-1] + return + } + } + panic("edge not found: " + edge.String()) +} + +// removeInEdge removes edge.Callee's incoming edge 'edge'. +func removeInEdge(edge *Edge) { + caller := edge.Callee + n := len(caller.In) + for i, e := range caller.In { + if e == edge { + // Replace it with the final element and shrink the slice. + caller.In[i] = caller.In[n-1] + caller.In[n-1] = nil // aid GC + caller.In = caller.In[:n-1] + return + } + } + panic("edge not found: " + edge.String()) +} diff --git a/vendor/golang.org/x/tools/go/exact/exact.go b/vendor/golang.org/x/tools/go/exact/exact.go new file mode 100644 index 0000000..51c4906 --- /dev/null +++ b/vendor/golang.org/x/tools/go/exact/exact.go @@ -0,0 +1,920 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package exact implements Values representing untyped +// Go constants and the corresponding operations. Values +// and operations have unlimited precision. +// +// A special Unknown value may be used when a value +// is unknown due to an error. Operations on unknown +// values produce unknown values unless specified +// otherwise. +// +package exact // import "golang.org/x/tools/go/exact" + +import ( + "fmt" + "go/token" + "math/big" + "strconv" +) + +// Kind specifies the kind of value represented by a Value. +type Kind int + +// Implementation note: Kinds must be enumerated in +// order of increasing "complexity" (used by match). + +const ( + // unknown values + Unknown Kind = iota + + // non-numeric values + Bool + String + + // numeric values + Int + Float + Complex +) + +// A Value represents a mathematically exact value of a given Kind. +type Value interface { + // Kind returns the value kind; it is always the smallest + // kind in which the value can be represented exactly. + Kind() Kind + + // String returns a human-readable form of the value. + String() string + + // Prevent external implementations. + implementsValue() +} + +// ---------------------------------------------------------------------------- +// Implementations + +type ( + unknownVal struct{} + boolVal bool + stringVal string + int64Val int64 + intVal struct{ val *big.Int } + floatVal struct{ val *big.Rat } + complexVal struct{ re, im *big.Rat } +) + +func (unknownVal) Kind() Kind { return Unknown } +func (boolVal) Kind() Kind { return Bool } +func (stringVal) Kind() Kind { return String } +func (int64Val) Kind() Kind { return Int } +func (intVal) Kind() Kind { return Int } +func (floatVal) Kind() Kind { return Float } +func (complexVal) Kind() Kind { return Complex } + +func (unknownVal) String() string { return "unknown" } +func (x boolVal) String() string { return fmt.Sprintf("%v", bool(x)) } +func (x stringVal) String() string { return strconv.Quote(string(x)) } +func (x int64Val) String() string { return strconv.FormatInt(int64(x), 10) } +func (x intVal) String() string { return x.val.String() } +func (x floatVal) String() string { return x.val.String() } +func (x complexVal) String() string { return fmt.Sprintf("(%s + %si)", x.re, x.im) } + +func (unknownVal) implementsValue() {} +func (boolVal) implementsValue() {} +func (stringVal) implementsValue() {} +func (int64Val) implementsValue() {} +func (intVal) implementsValue() {} +func (floatVal) implementsValue() {} +func (complexVal) implementsValue() {} + +// int64 bounds +var ( + minInt64 = big.NewInt(-1 << 63) + maxInt64 = big.NewInt(1<<63 - 1) +) + +func normInt(x *big.Int) Value { + if minInt64.Cmp(x) <= 0 && x.Cmp(maxInt64) <= 0 { + return int64Val(x.Int64()) + } + return intVal{x} +} + +func normFloat(x *big.Rat) Value { + if x.IsInt() { + return normInt(x.Num()) + } + return floatVal{x} +} + +func normComplex(re, im *big.Rat) Value { + if im.Sign() == 0 { + return normFloat(re) + } + return complexVal{re, im} +} + +// ---------------------------------------------------------------------------- +// Factories + +// MakeUnknown returns the Unknown value. +func MakeUnknown() Value { return unknownVal{} } + +// MakeBool returns the Bool value for x. +func MakeBool(b bool) Value { return boolVal(b) } + +// MakeString returns the String value for x. +func MakeString(s string) Value { return stringVal(s) } + +// MakeInt64 returns the Int value for x. +func MakeInt64(x int64) Value { return int64Val(x) } + +// MakeUint64 returns the Int value for x. +func MakeUint64(x uint64) Value { return normInt(new(big.Int).SetUint64(x)) } + +// MakeFloat64 returns the numeric value for x. +// If x is not finite, the result is unknown. +func MakeFloat64(x float64) Value { + if f := new(big.Rat).SetFloat64(x); f != nil { + return normFloat(f) + } + return unknownVal{} +} + +// MakeFromLiteral returns the corresponding integer, floating-point, +// imaginary, character, or string value for a Go literal string. The +// result is nil if the literal string is invalid. +func MakeFromLiteral(lit string, tok token.Token) Value { + switch tok { + case token.INT: + if x, err := strconv.ParseInt(lit, 0, 64); err == nil { + return int64Val(x) + } + if x, ok := new(big.Int).SetString(lit, 0); ok { + return intVal{x} + } + + case token.FLOAT: + if x, ok := new(big.Rat).SetString(lit); ok { + return normFloat(x) + } + + case token.IMAG: + if n := len(lit); n > 0 && lit[n-1] == 'i' { + if im, ok := new(big.Rat).SetString(lit[0 : n-1]); ok { + return normComplex(big.NewRat(0, 1), im) + } + } + + case token.CHAR: + if n := len(lit); n >= 2 { + if code, _, _, err := strconv.UnquoteChar(lit[1:n-1], '\''); err == nil { + return int64Val(code) + } + } + + case token.STRING: + if s, err := strconv.Unquote(lit); err == nil { + return stringVal(s) + } + } + + return nil +} + +// ---------------------------------------------------------------------------- +// Accessors +// +// For unknown arguments the result is the zero value for the respective +// accessor type, except for Sign, where the result is 1. + +// BoolVal returns the Go boolean value of x, which must be a Bool or an Unknown. +// If x is Unknown, the result is false. +func BoolVal(x Value) bool { + switch x := x.(type) { + case boolVal: + return bool(x) + case unknownVal: + return false + } + panic(fmt.Sprintf("%v not a Bool", x)) +} + +// StringVal returns the Go string value of x, which must be a String or an Unknown. +// If x is Unknown, the result is "". +func StringVal(x Value) string { + switch x := x.(type) { + case stringVal: + return string(x) + case unknownVal: + return "" + } + panic(fmt.Sprintf("%v not a String", x)) +} + +// Int64Val returns the Go int64 value of x and whether the result is exact; +// x must be an Int or an Unknown. If the result is not exact, its value is undefined. +// If x is Unknown, the result is (0, false). +func Int64Val(x Value) (int64, bool) { + switch x := x.(type) { + case int64Val: + return int64(x), true + case intVal: + return x.val.Int64(), x.val.BitLen() <= 63 + case unknownVal: + return 0, false + } + panic(fmt.Sprintf("%v not an Int", x)) +} + +// Uint64Val returns the Go uint64 value of x and whether the result is exact; +// x must be an Int or an Unknown. If the result is not exact, its value is undefined. +// If x is Unknown, the result is (0, false). +func Uint64Val(x Value) (uint64, bool) { + switch x := x.(type) { + case int64Val: + return uint64(x), x >= 0 + case intVal: + return x.val.Uint64(), x.val.Sign() >= 0 && x.val.BitLen() <= 64 + case unknownVal: + return 0, false + } + panic(fmt.Sprintf("%v not an Int", x)) +} + +// Float32Val is like Float64Val but for float32 instead of float64. +func Float32Val(x Value) (float32, bool) { + switch x := x.(type) { + case int64Val: + f := float32(x) + return f, int64Val(f) == x + case intVal: + return ratToFloat32(new(big.Rat).SetFrac(x.val, int1)) + case floatVal: + return ratToFloat32(x.val) + case unknownVal: + return 0, false + } + panic(fmt.Sprintf("%v not a Float", x)) +} + +// Float64Val returns the nearest Go float64 value of x and whether the result is exact; +// x must be numeric but not Complex, or Unknown. For values too small (too close to 0) +// to represent as float64, Float64Val silently underflows to 0. The result sign always +// matches the sign of x, even for 0. +// If x is Unknown, the result is (0, false). +func Float64Val(x Value) (float64, bool) { + switch x := x.(type) { + case int64Val: + f := float64(int64(x)) + return f, int64Val(f) == x + case intVal: + return new(big.Rat).SetFrac(x.val, int1).Float64() + case floatVal: + return x.val.Float64() + case unknownVal: + return 0, false + } + panic(fmt.Sprintf("%v not a Float", x)) +} + +// BitLen returns the number of bits required to represent +// the absolute value x in binary representation; x must be an Int or an Unknown. +// If x is Unknown, the result is 0. +func BitLen(x Value) int { + switch x := x.(type) { + case int64Val: + return new(big.Int).SetInt64(int64(x)).BitLen() + case intVal: + return x.val.BitLen() + case unknownVal: + return 0 + } + panic(fmt.Sprintf("%v not an Int", x)) +} + +// Sign returns -1, 0, or 1 depending on whether x < 0, x == 0, or x > 0; +// x must be numeric or Unknown. For complex values x, the sign is 0 if x == 0, +// otherwise it is != 0. If x is Unknown, the result is 1. +func Sign(x Value) int { + switch x := x.(type) { + case int64Val: + switch { + case x < 0: + return -1 + case x > 0: + return 1 + } + return 0 + case intVal: + return x.val.Sign() + case floatVal: + return x.val.Sign() + case complexVal: + return x.re.Sign() | x.im.Sign() + case unknownVal: + return 1 // avoid spurious division by zero errors + } + panic(fmt.Sprintf("%v not numeric", x)) +} + +// ---------------------------------------------------------------------------- +// Support for serializing/deserializing integers + +const ( + // Compute the size of a Word in bytes. + _m = ^big.Word(0) + _log = _m>>8&1 + _m>>16&1 + _m>>32&1 + wordSize = 1 << _log +) + +// Bytes returns the bytes for the absolute value of x in little- +// endian binary representation; x must be an Int. +func Bytes(x Value) []byte { + var val *big.Int + switch x := x.(type) { + case int64Val: + val = new(big.Int).SetInt64(int64(x)) + case intVal: + val = x.val + default: + panic(fmt.Sprintf("%v not an Int", x)) + } + + words := val.Bits() + bytes := make([]byte, len(words)*wordSize) + + i := 0 + for _, w := range words { + for j := 0; j < wordSize; j++ { + bytes[i] = byte(w) + w >>= 8 + i++ + } + } + // remove leading 0's + for i > 0 && bytes[i-1] == 0 { + i-- + } + + return bytes[:i] +} + +// MakeFromBytes returns the Int value given the bytes of its little-endian +// binary representation. An empty byte slice argument represents 0. +func MakeFromBytes(bytes []byte) Value { + words := make([]big.Word, (len(bytes)+(wordSize-1))/wordSize) + + i := 0 + var w big.Word + var s uint + for _, b := range bytes { + w |= big.Word(b) << s + if s += 8; s == wordSize*8 { + words[i] = w + i++ + w = 0 + s = 0 + } + } + // store last word + if i < len(words) { + words[i] = w + i++ + } + // remove leading 0's + for i > 0 && words[i-1] == 0 { + i-- + } + + return normInt(new(big.Int).SetBits(words[:i])) +} + +// ---------------------------------------------------------------------------- +// Support for disassembling fractions + +// Num returns the numerator of x; x must be Int, Float, or Unknown. +// If x is Unknown, the result is Unknown, otherwise it is an Int +// with the same sign as x. +func Num(x Value) Value { + switch x := x.(type) { + case unknownVal, int64Val, intVal: + return x + case floatVal: + return normInt(x.val.Num()) + } + panic(fmt.Sprintf("%v not Int or Float", x)) +} + +// Denom returns the denominator of x; x must be Int, Float, or Unknown. +// If x is Unknown, the result is Unknown, otherwise it is an Int >= 1. +func Denom(x Value) Value { + switch x := x.(type) { + case unknownVal: + return x + case int64Val, intVal: + return int64Val(1) + case floatVal: + return normInt(x.val.Denom()) + } + panic(fmt.Sprintf("%v not Int or Float", x)) +} + +// ---------------------------------------------------------------------------- +// Support for assembling/disassembling complex numbers + +// MakeImag returns the numeric value x*i (possibly 0); +// x must be Int, Float, or Unknown. +// If x is Unknown, the result is Unknown. +func MakeImag(x Value) Value { + var im *big.Rat + switch x := x.(type) { + case unknownVal: + return x + case int64Val: + im = big.NewRat(int64(x), 1) + case intVal: + im = new(big.Rat).SetFrac(x.val, int1) + case floatVal: + im = x.val + default: + panic(fmt.Sprintf("%v not Int or Float", x)) + } + return normComplex(rat0, im) +} + +// Real returns the real part of x, which must be a numeric or unknown value. +// If x is Unknown, the result is Unknown. +func Real(x Value) Value { + switch x := x.(type) { + case unknownVal, int64Val, intVal, floatVal: + return x + case complexVal: + return normFloat(x.re) + } + panic(fmt.Sprintf("%v not numeric", x)) +} + +// Imag returns the imaginary part of x, which must be a numeric or unknown value. +// If x is Unknown, the result is Unknown. +func Imag(x Value) Value { + switch x := x.(type) { + case unknownVal: + return x + case int64Val, intVal, floatVal: + return int64Val(0) + case complexVal: + return normFloat(x.im) + } + panic(fmt.Sprintf("%v not numeric", x)) +} + +// ---------------------------------------------------------------------------- +// Operations + +// is32bit reports whether x can be represented using 32 bits. +func is32bit(x int64) bool { + const s = 32 + return -1<<(s-1) <= x && x <= 1<<(s-1)-1 +} + +// is63bit reports whether x can be represented using 63 bits. +func is63bit(x int64) bool { + const s = 63 + return -1<<(s-1) <= x && x <= 1<<(s-1)-1 +} + +// UnaryOp returns the result of the unary expression op y. +// The operation must be defined for the operand. +// If size >= 0 it specifies the ^ (xor) result size in bytes. +// If y is Unknown, the result is Unknown. +// +func UnaryOp(op token.Token, y Value, size int) Value { + switch op { + case token.ADD: + switch y.(type) { + case unknownVal, int64Val, intVal, floatVal, complexVal: + return y + } + + case token.SUB: + switch y := y.(type) { + case unknownVal: + return y + case int64Val: + if z := -y; z != y { + return z // no overflow + } + return normInt(new(big.Int).Neg(big.NewInt(int64(y)))) + case intVal: + return normInt(new(big.Int).Neg(y.val)) + case floatVal: + return normFloat(new(big.Rat).Neg(y.val)) + case complexVal: + return normComplex(new(big.Rat).Neg(y.re), new(big.Rat).Neg(y.im)) + } + + case token.XOR: + var z big.Int + switch y := y.(type) { + case unknownVal: + return y + case int64Val: + z.Not(big.NewInt(int64(y))) + case intVal: + z.Not(y.val) + default: + goto Error + } + // For unsigned types, the result will be negative and + // thus "too large": We must limit the result size to + // the type's size. + if size >= 0 { + s := uint(size) * 8 + z.AndNot(&z, new(big.Int).Lsh(big.NewInt(-1), s)) // z &^= (-1)< ord(y) { + y, x = match(y, x) + return x, y + } + // ord(x) <= ord(y) + + switch x := x.(type) { + case unknownVal: + return x, x + + case boolVal, stringVal, complexVal: + return x, y + + case int64Val: + switch y := y.(type) { + case int64Val: + return x, y + case intVal: + return intVal{big.NewInt(int64(x))}, y + case floatVal: + return floatVal{big.NewRat(int64(x), 1)}, y + case complexVal: + return complexVal{big.NewRat(int64(x), 1), rat0}, y + } + + case intVal: + switch y := y.(type) { + case intVal: + return x, y + case floatVal: + return floatVal{new(big.Rat).SetFrac(x.val, int1)}, y + case complexVal: + return complexVal{new(big.Rat).SetFrac(x.val, int1), rat0}, y + } + + case floatVal: + switch y := y.(type) { + case floatVal: + return x, y + case complexVal: + return complexVal{x.val, rat0}, y + } + } + + panic("unreachable") +} + +// BinaryOp returns the result of the binary expression x op y. +// The operation must be defined for the operands. If one of the +// operands is Unknown, the result is Unknown. +// To force integer division of Int operands, use op == token.QUO_ASSIGN +// instead of token.QUO; the result is guaranteed to be Int in this case. +// Division by zero leads to a run-time panic. +// +func BinaryOp(x Value, op token.Token, y Value) Value { + x, y = match(x, y) + + switch x := x.(type) { + case unknownVal: + return x + + case boolVal: + y := y.(boolVal) + switch op { + case token.LAND: + return x && y + case token.LOR: + return x || y + } + + case int64Val: + a := int64(x) + b := int64(y.(int64Val)) + var c int64 + switch op { + case token.ADD: + if !is63bit(a) || !is63bit(b) { + return normInt(new(big.Int).Add(big.NewInt(a), big.NewInt(b))) + } + c = a + b + case token.SUB: + if !is63bit(a) || !is63bit(b) { + return normInt(new(big.Int).Sub(big.NewInt(a), big.NewInt(b))) + } + c = a - b + case token.MUL: + if !is32bit(a) || !is32bit(b) { + return normInt(new(big.Int).Mul(big.NewInt(a), big.NewInt(b))) + } + c = a * b + case token.QUO: + return normFloat(new(big.Rat).SetFrac(big.NewInt(a), big.NewInt(b))) + case token.QUO_ASSIGN: // force integer division + c = a / b + case token.REM: + c = a % b + case token.AND: + c = a & b + case token.OR: + c = a | b + case token.XOR: + c = a ^ b + case token.AND_NOT: + c = a &^ b + default: + goto Error + } + return int64Val(c) + + case intVal: + a := x.val + b := y.(intVal).val + var c big.Int + switch op { + case token.ADD: + c.Add(a, b) + case token.SUB: + c.Sub(a, b) + case token.MUL: + c.Mul(a, b) + case token.QUO: + return normFloat(new(big.Rat).SetFrac(a, b)) + case token.QUO_ASSIGN: // force integer division + c.Quo(a, b) + case token.REM: + c.Rem(a, b) + case token.AND: + c.And(a, b) + case token.OR: + c.Or(a, b) + case token.XOR: + c.Xor(a, b) + case token.AND_NOT: + c.AndNot(a, b) + default: + goto Error + } + return normInt(&c) + + case floatVal: + a := x.val + b := y.(floatVal).val + var c big.Rat + switch op { + case token.ADD: + c.Add(a, b) + case token.SUB: + c.Sub(a, b) + case token.MUL: + c.Mul(a, b) + case token.QUO: + c.Quo(a, b) + default: + goto Error + } + return normFloat(&c) + + case complexVal: + y := y.(complexVal) + a, b := x.re, x.im + c, d := y.re, y.im + var re, im big.Rat + switch op { + case token.ADD: + // (a+c) + i(b+d) + re.Add(a, c) + im.Add(b, d) + case token.SUB: + // (a-c) + i(b-d) + re.Sub(a, c) + im.Sub(b, d) + case token.MUL: + // (ac-bd) + i(bc+ad) + var ac, bd, bc, ad big.Rat + ac.Mul(a, c) + bd.Mul(b, d) + bc.Mul(b, c) + ad.Mul(a, d) + re.Sub(&ac, &bd) + im.Add(&bc, &ad) + case token.QUO: + // (ac+bd)/s + i(bc-ad)/s, with s = cc + dd + var ac, bd, bc, ad, s, cc, dd big.Rat + ac.Mul(a, c) + bd.Mul(b, d) + bc.Mul(b, c) + ad.Mul(a, d) + cc.Mul(c, c) + dd.Mul(d, d) + s.Add(&cc, &dd) + re.Add(&ac, &bd) + re.Quo(&re, &s) + im.Sub(&bc, &ad) + im.Quo(&im, &s) + default: + goto Error + } + return normComplex(&re, &im) + + case stringVal: + if op == token.ADD { + return x + y.(stringVal) + } + } + +Error: + panic(fmt.Sprintf("invalid binary operation %v %s %v", x, op, y)) +} + +// Shift returns the result of the shift expression x op s +// with op == token.SHL or token.SHR (<< or >>). x must be +// an Int or an Unknown. If x is Unknown, the result is x. +// +func Shift(x Value, op token.Token, s uint) Value { + switch x := x.(type) { + case unknownVal: + return x + + case int64Val: + if s == 0 { + return x + } + switch op { + case token.SHL: + z := big.NewInt(int64(x)) + return normInt(z.Lsh(z, s)) + case token.SHR: + return x >> s + } + + case intVal: + if s == 0 { + return x + } + var z big.Int + switch op { + case token.SHL: + return normInt(z.Lsh(x.val, s)) + case token.SHR: + return normInt(z.Rsh(x.val, s)) + } + } + + panic(fmt.Sprintf("invalid shift %v %s %d", x, op, s)) +} + +func cmpZero(x int, op token.Token) bool { + switch op { + case token.EQL: + return x == 0 + case token.NEQ: + return x != 0 + case token.LSS: + return x < 0 + case token.LEQ: + return x <= 0 + case token.GTR: + return x > 0 + case token.GEQ: + return x >= 0 + } + panic("unreachable") +} + +// Compare returns the result of the comparison x op y. +// The comparison must be defined for the operands. +// If one of the operands is Unknown, the result is +// false. +// +func Compare(x Value, op token.Token, y Value) bool { + x, y = match(x, y) + + switch x := x.(type) { + case unknownVal: + return false + + case boolVal: + y := y.(boolVal) + switch op { + case token.EQL: + return x == y + case token.NEQ: + return x != y + } + + case int64Val: + y := y.(int64Val) + switch op { + case token.EQL: + return x == y + case token.NEQ: + return x != y + case token.LSS: + return x < y + case token.LEQ: + return x <= y + case token.GTR: + return x > y + case token.GEQ: + return x >= y + } + + case intVal: + return cmpZero(x.val.Cmp(y.(intVal).val), op) + + case floatVal: + return cmpZero(x.val.Cmp(y.(floatVal).val), op) + + case complexVal: + y := y.(complexVal) + re := x.re.Cmp(y.re) + im := x.im.Cmp(y.im) + switch op { + case token.EQL: + return re == 0 && im == 0 + case token.NEQ: + return re != 0 || im != 0 + } + + case stringVal: + y := y.(stringVal) + switch op { + case token.EQL: + return x == y + case token.NEQ: + return x != y + case token.LSS: + return x < y + case token.LEQ: + return x <= y + case token.GTR: + return x > y + case token.GEQ: + return x >= y + } + } + + panic(fmt.Sprintf("invalid comparison %v %s %v", x, op, y)) +} diff --git a/vendor/golang.org/x/tools/go/exact/go13.go b/vendor/golang.org/x/tools/go/exact/go13.go new file mode 100644 index 0000000..1016c14 --- /dev/null +++ b/vendor/golang.org/x/tools/go/exact/go13.go @@ -0,0 +1,24 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// +build !go1.4 + +package exact + +import ( + "math" + "math/big" +) + +func ratToFloat32(x *big.Rat) (float32, bool) { + // Before 1.4, there's no Rat.Float32. + // Emulate it, albeit at the cost of + // imprecision in corner cases. + x64, exact := x.Float64() + x32 := float32(x64) + if math.IsInf(float64(x32), 0) { + exact = false + } + return x32, exact +} diff --git a/vendor/golang.org/x/tools/go/exact/go14.go b/vendor/golang.org/x/tools/go/exact/go14.go new file mode 100644 index 0000000..b86e5d2 --- /dev/null +++ b/vendor/golang.org/x/tools/go/exact/go14.go @@ -0,0 +1,13 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// +build go1.4 + +package exact + +import "math/big" + +func ratToFloat32(x *big.Rat) (float32, bool) { + return x.Float32() +} diff --git a/vendor/golang.org/x/tools/go/gcimporter/exportdata.go b/vendor/golang.org/x/tools/go/gcimporter/exportdata.go new file mode 100644 index 0000000..657742b --- /dev/null +++ b/vendor/golang.org/x/tools/go/gcimporter/exportdata.go @@ -0,0 +1,108 @@ +// Copyright 2011 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// This file implements FindExportData. + +package gcimporter + +import ( + "bufio" + "errors" + "fmt" + "io" + "strconv" + "strings" +) + +func readGopackHeader(r *bufio.Reader) (name string, size int, err error) { + // See $GOROOT/include/ar.h. + hdr := make([]byte, 16+12+6+6+8+10+2) + _, err = io.ReadFull(r, hdr) + if err != nil { + return + } + // leave for debugging + if false { + fmt.Printf("header: %s", hdr) + } + s := strings.TrimSpace(string(hdr[16+12+6+6+8:][:10])) + size, err = strconv.Atoi(s) + if err != nil || hdr[len(hdr)-2] != '`' || hdr[len(hdr)-1] != '\n' { + err = errors.New("invalid archive header") + return + } + name = strings.TrimSpace(string(hdr[:16])) + return +} + +// FindExportData positions the reader r at the beginning of the +// export data section of an underlying GC-created object/archive +// file by reading from it. The reader must be positioned at the +// start of the file before calling this function. +// +func FindExportData(r *bufio.Reader) (err error) { + // Read first line to make sure this is an object file. + line, err := r.ReadSlice('\n') + if err != nil { + return + } + if string(line) == "!\n" { + // Archive file. Scan to __.PKGDEF. + var name string + var size int + if name, size, err = readGopackHeader(r); err != nil { + return + } + + // Optional leading __.GOSYMDEF or __.SYMDEF. + // Read and discard. + if name == "__.SYMDEF" || name == "__.GOSYMDEF" { + const block = 4096 + tmp := make([]byte, block) + for size > 0 { + n := size + if n > block { + n = block + } + if _, err = io.ReadFull(r, tmp[:n]); err != nil { + return + } + size -= n + } + + if name, size, err = readGopackHeader(r); err != nil { + return + } + } + + // First real entry should be __.PKGDEF. + if name != "__.PKGDEF" { + err = errors.New("go archive is missing __.PKGDEF") + return + } + + // Read first line of __.PKGDEF data, so that line + // is once again the first line of the input. + if line, err = r.ReadSlice('\n'); err != nil { + return + } + } + + // Now at __.PKGDEF in archive or still at beginning of file. + // Either way, line should begin with "go object ". + if !strings.HasPrefix(string(line), "go object ") { + err = errors.New("not a go object file") + return + } + + // Skip over object header to export data. + // Begins after first line with $$. + for line[0] != '$' { + if line, err = r.ReadSlice('\n'); err != nil { + return + } + } + + return +} diff --git a/vendor/golang.org/x/tools/go/gcimporter/gcimporter.go b/vendor/golang.org/x/tools/go/gcimporter/gcimporter.go new file mode 100644 index 0000000..031e870 --- /dev/null +++ b/vendor/golang.org/x/tools/go/gcimporter/gcimporter.go @@ -0,0 +1,995 @@ +// Copyright 2011 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package gcimporter implements Import for gc-generated object files. +// Importing this package installs Import as go/types.DefaultImport. +package gcimporter // import "golang.org/x/tools/go/gcimporter" + +import ( + "bufio" + "errors" + "fmt" + "go/build" + "go/token" + "io" + "os" + "path/filepath" + "sort" + "strconv" + "strings" + "text/scanner" + + "golang.org/x/tools/go/exact" + "golang.org/x/tools/go/types" +) + +// debugging/development support +const debug = false + +func init() { + types.DefaultImport = Import +} + +var pkgExts = [...]string{".a", ".5", ".6", ".7", ".8", ".9"} + +// FindPkg returns the filename and unique package id for an import +// path based on package information provided by build.Import (using +// the build.Default build.Context). +// If no file was found, an empty filename is returned. +// +func FindPkg(path, srcDir string) (filename, id string) { + if len(path) == 0 { + return + } + + id = path + var noext string + switch { + default: + // "x" -> "$GOPATH/pkg/$GOOS_$GOARCH/x.ext", "x" + // Don't require the source files to be present. + bp, _ := build.Import(path, srcDir, build.FindOnly|build.AllowBinary) + if bp.PkgObj == "" { + return + } + noext = strings.TrimSuffix(bp.PkgObj, ".a") + + case build.IsLocalImport(path): + // "./x" -> "/this/directory/x.ext", "/this/directory/x" + noext = filepath.Join(srcDir, path) + id = noext + + case filepath.IsAbs(path): + // for completeness only - go/build.Import + // does not support absolute imports + // "/x" -> "/x.ext", "/x" + noext = path + } + + // try extensions + for _, ext := range pkgExts { + filename = noext + ext + if f, err := os.Stat(filename); err == nil && !f.IsDir() { + return + } + } + + filename = "" // not found + return +} + +// ImportData imports a package by reading the gc-generated export data, +// adds the corresponding package object to the packages map indexed by id, +// and returns the object. +// +// The packages map must contains all packages already imported. The data +// reader position must be the beginning of the export data section. The +// filename is only used in error messages. +// +// If packages[id] contains the completely imported package, that package +// can be used directly, and there is no need to call this function (but +// there is also no harm but for extra time used). +// +func ImportData(packages map[string]*types.Package, filename, id string, data io.Reader) (pkg *types.Package, err error) { + // support for parser error handling + defer func() { + switch r := recover().(type) { + case nil: + // nothing to do + case importError: + err = r + default: + panic(r) // internal error + } + }() + + var p parser + p.init(filename, id, data, packages) + pkg = p.parseExport() + + return +} + +// Import imports a gc-generated package given its import path, adds the +// corresponding package object to the packages map, and returns the object. +// Local import paths are interpreted relative to the current working directory. +// The packages map must contains all packages already imported. +// +func Import(packages map[string]*types.Package, path string) (pkg *types.Package, err error) { + if path == "unsafe" { + return types.Unsafe, nil + } + + srcDir := "." + if build.IsLocalImport(path) { + srcDir, err = os.Getwd() + if err != nil { + return + } + } + + filename, id := FindPkg(path, srcDir) + if filename == "" { + err = fmt.Errorf("can't find import: %s", id) + return + } + + // no need to re-import if the package was imported completely before + if pkg = packages[id]; pkg != nil && pkg.Complete() { + return + } + + // open file + f, err := os.Open(filename) + if err != nil { + return + } + defer func() { + f.Close() + if err != nil { + // add file name to error + err = fmt.Errorf("reading export data: %s: %v", filename, err) + } + }() + + buf := bufio.NewReader(f) + if err = FindExportData(buf); err != nil { + return + } + + pkg, err = ImportData(packages, filename, id, buf) + + return +} + +// ---------------------------------------------------------------------------- +// Parser + +// TODO(gri) Imported objects don't have position information. +// Ideally use the debug table line info; alternatively +// create some fake position (or the position of the +// import). That way error messages referring to imported +// objects can print meaningful information. + +// parser parses the exports inside a gc compiler-produced +// object/archive file and populates its scope with the results. +type parser struct { + scanner scanner.Scanner + tok rune // current token + lit string // literal string; only valid for Ident, Int, String tokens + id string // package id of imported package + sharedPkgs map[string]*types.Package // package id -> package object (across importer) + localPkgs map[string]*types.Package // package id -> package object (just this package) +} + +func (p *parser) init(filename, id string, src io.Reader, packages map[string]*types.Package) { + p.scanner.Init(src) + p.scanner.Error = func(_ *scanner.Scanner, msg string) { p.error(msg) } + p.scanner.Mode = scanner.ScanIdents | scanner.ScanInts | scanner.ScanChars | scanner.ScanStrings | scanner.ScanComments | scanner.SkipComments + p.scanner.Whitespace = 1<<'\t' | 1<<' ' + p.scanner.Filename = filename // for good error messages + p.next() + p.id = id + p.sharedPkgs = packages + if debug { + // check consistency of packages map + for _, pkg := range packages { + if pkg.Name() == "" { + fmt.Printf("no package name for %s\n", pkg.Path()) + } + } + } +} + +func (p *parser) next() { + p.tok = p.scanner.Scan() + switch p.tok { + case scanner.Ident, scanner.Int, scanner.Char, scanner.String, '·': + p.lit = p.scanner.TokenText() + default: + p.lit = "" + } + if debug { + fmt.Printf("%s: %q -> %q\n", scanner.TokenString(p.tok), p.scanner.TokenText(), p.lit) + } +} + +func declTypeName(pkg *types.Package, name string) *types.TypeName { + scope := pkg.Scope() + if obj := scope.Lookup(name); obj != nil { + return obj.(*types.TypeName) + } + obj := types.NewTypeName(token.NoPos, pkg, name, nil) + // a named type may be referred to before the underlying type + // is known - set it up + types.NewNamed(obj, nil, nil) + scope.Insert(obj) + return obj +} + +// ---------------------------------------------------------------------------- +// Error handling + +// Internal errors are boxed as importErrors. +type importError struct { + pos scanner.Position + err error +} + +func (e importError) Error() string { + return fmt.Sprintf("import error %s (byte offset = %d): %s", e.pos, e.pos.Offset, e.err) +} + +func (p *parser) error(err interface{}) { + if s, ok := err.(string); ok { + err = errors.New(s) + } + // panic with a runtime.Error if err is not an error + panic(importError{p.scanner.Pos(), err.(error)}) +} + +func (p *parser) errorf(format string, args ...interface{}) { + p.error(fmt.Sprintf(format, args...)) +} + +func (p *parser) expect(tok rune) string { + lit := p.lit + if p.tok != tok { + p.errorf("expected %s, got %s (%s)", scanner.TokenString(tok), scanner.TokenString(p.tok), lit) + } + p.next() + return lit +} + +func (p *parser) expectSpecial(tok string) { + sep := 'x' // not white space + i := 0 + for i < len(tok) && p.tok == rune(tok[i]) && sep > ' ' { + sep = p.scanner.Peek() // if sep <= ' ', there is white space before the next token + p.next() + i++ + } + if i < len(tok) { + p.errorf("expected %q, got %q", tok, tok[0:i]) + } +} + +func (p *parser) expectKeyword(keyword string) { + lit := p.expect(scanner.Ident) + if lit != keyword { + p.errorf("expected keyword %s, got %q", keyword, lit) + } +} + +// ---------------------------------------------------------------------------- +// Qualified and unqualified names + +// PackageId = string_lit . +// +func (p *parser) parsePackageId() string { + id, err := strconv.Unquote(p.expect(scanner.String)) + if err != nil { + p.error(err) + } + // id == "" stands for the imported package id + // (only known at time of package installation) + if id == "" { + id = p.id + } + return id +} + +// PackageName = ident . +// +func (p *parser) parsePackageName() string { + return p.expect(scanner.Ident) +} + +// dotIdentifier = ( ident | '·' ) { ident | int | '·' } . +func (p *parser) parseDotIdent() string { + ident := "" + if p.tok != scanner.Int { + sep := 'x' // not white space + for (p.tok == scanner.Ident || p.tok == scanner.Int || p.tok == '·') && sep > ' ' { + ident += p.lit + sep = p.scanner.Peek() // if sep <= ' ', there is white space before the next token + p.next() + } + } + if ident == "" { + p.expect(scanner.Ident) // use expect() for error handling + } + return ident +} + +// QualifiedName = "@" PackageId "." ( "?" | dotIdentifier ) . +// +func (p *parser) parseQualifiedName() (id, name string) { + p.expect('@') + id = p.parsePackageId() + p.expect('.') + // Per rev f280b8a485fd (10/2/2013), qualified names may be used for anonymous fields. + if p.tok == '?' { + p.next() + } else { + name = p.parseDotIdent() + } + return +} + +// getPkg returns the package for a given id. If the package is +// not found but we have a package name, create the package and +// add it to the p.localPkgs and p.sharedPkgs maps. +// +// id identifies a package, usually by a canonical package path like +// "encoding/json" but possibly by a non-canonical import path like +// "./json". +// +func (p *parser) getPkg(id, name string) *types.Package { + // package unsafe is not in the packages maps - handle explicitly + if id == "unsafe" { + return types.Unsafe + } + + pkg := p.localPkgs[id] + if pkg == nil && name != "" { + // first import of id from this package + pkg = p.sharedPkgs[id] + if pkg == nil { + // first import of id by this importer + pkg = types.NewPackage(id, name) + p.sharedPkgs[id] = pkg + } + + if p.localPkgs == nil { + p.localPkgs = make(map[string]*types.Package) + } + p.localPkgs[id] = pkg + } + return pkg +} + +// parseExportedName is like parseQualifiedName, but +// the package id is resolved to an imported *types.Package. +// +func (p *parser) parseExportedName() (pkg *types.Package, name string) { + id, name := p.parseQualifiedName() + pkg = p.getPkg(id, "") + if pkg == nil { + p.errorf("%s package not found", id) + } + return +} + +// ---------------------------------------------------------------------------- +// Types + +// BasicType = identifier . +// +func (p *parser) parseBasicType() types.Type { + id := p.expect(scanner.Ident) + obj := types.Universe.Lookup(id) + if obj, ok := obj.(*types.TypeName); ok { + return obj.Type() + } + p.errorf("not a basic type: %s", id) + return nil +} + +// ArrayType = "[" int_lit "]" Type . +// +func (p *parser) parseArrayType() types.Type { + // "[" already consumed and lookahead known not to be "]" + lit := p.expect(scanner.Int) + p.expect(']') + elem := p.parseType() + n, err := strconv.ParseInt(lit, 10, 64) + if err != nil { + p.error(err) + } + return types.NewArray(elem, n) +} + +// MapType = "map" "[" Type "]" Type . +// +func (p *parser) parseMapType() types.Type { + p.expectKeyword("map") + p.expect('[') + key := p.parseType() + p.expect(']') + elem := p.parseType() + return types.NewMap(key, elem) +} + +// Name = identifier | "?" | QualifiedName . +// +// If materializePkg is set, the returned package is guaranteed to be set. +// For fully qualified names, the returned package may be a fake package +// (without name, scope, and not in the p.imports map), created for the +// sole purpose of providing a package path. Fake packages are created +// when the package id is not found in the p.imports map; in that case +// we cannot create a real package because we don't have a package name. +// For non-qualified names, the returned package is the imported package. +// +func (p *parser) parseName(materializePkg bool) (pkg *types.Package, name string) { + switch p.tok { + case scanner.Ident: + pkg = p.sharedPkgs[p.id] + name = p.lit + p.next() + case '?': + // anonymous + pkg = p.sharedPkgs[p.id] + p.next() + case '@': + // exported name prefixed with package path + var id string + id, name = p.parseQualifiedName() + if materializePkg { + // we don't have a package name - if the package + // doesn't exist yet, create a fake package instead + pkg = p.getPkg(id, "") + if pkg == nil { + pkg = types.NewPackage(id, "") + } + } + default: + p.error("name expected") + } + return +} + +func deref(typ types.Type) types.Type { + if p, _ := typ.(*types.Pointer); p != nil { + return p.Elem() + } + return typ +} + +// Field = Name Type [ string_lit ] . +// +func (p *parser) parseField() (*types.Var, string) { + pkg, name := p.parseName(true) + typ := p.parseType() + anonymous := false + if name == "" { + // anonymous field - typ must be T or *T and T must be a type name + switch typ := deref(typ).(type) { + case *types.Basic: // basic types are named types + pkg = nil + name = typ.Name() + case *types.Named: + name = typ.Obj().Name() + default: + p.errorf("anonymous field expected") + } + anonymous = true + } + tag := "" + if p.tok == scanner.String { + s := p.expect(scanner.String) + var err error + tag, err = strconv.Unquote(s) + if err != nil { + p.errorf("invalid struct tag %s: %s", s, err) + } + } + return types.NewField(token.NoPos, pkg, name, typ, anonymous), tag +} + +// StructType = "struct" "{" [ FieldList ] "}" . +// FieldList = Field { ";" Field } . +// +func (p *parser) parseStructType() types.Type { + var fields []*types.Var + var tags []string + + p.expectKeyword("struct") + p.expect('{') + for i := 0; p.tok != '}' && p.tok != scanner.EOF; i++ { + if i > 0 { + p.expect(';') + } + fld, tag := p.parseField() + if tag != "" && tags == nil { + tags = make([]string, i) + } + if tags != nil { + tags = append(tags, tag) + } + fields = append(fields, fld) + } + p.expect('}') + + return types.NewStruct(fields, tags) +} + +// Parameter = ( identifier | "?" ) [ "..." ] Type [ string_lit ] . +// +func (p *parser) parseParameter() (par *types.Var, isVariadic bool) { + _, name := p.parseName(false) + // remove gc-specific parameter numbering + if i := strings.Index(name, "·"); i >= 0 { + name = name[:i] + } + if p.tok == '.' { + p.expectSpecial("...") + isVariadic = true + } + typ := p.parseType() + if isVariadic { + typ = types.NewSlice(typ) + } + // ignore argument tag (e.g. "noescape") + if p.tok == scanner.String { + p.next() + } + // TODO(gri) should we provide a package? + par = types.NewVar(token.NoPos, nil, name, typ) + return +} + +// Parameters = "(" [ ParameterList ] ")" . +// ParameterList = { Parameter "," } Parameter . +// +func (p *parser) parseParameters() (list []*types.Var, isVariadic bool) { + p.expect('(') + for p.tok != ')' && p.tok != scanner.EOF { + if len(list) > 0 { + p.expect(',') + } + par, variadic := p.parseParameter() + list = append(list, par) + if variadic { + if isVariadic { + p.error("... not on final argument") + } + isVariadic = true + } + } + p.expect(')') + + return +} + +// Signature = Parameters [ Result ] . +// Result = Type | Parameters . +// +func (p *parser) parseSignature(recv *types.Var) *types.Signature { + params, isVariadic := p.parseParameters() + + // optional result type + var results []*types.Var + if p.tok == '(' { + var variadic bool + results, variadic = p.parseParameters() + if variadic { + p.error("... not permitted on result type") + } + } + + return types.NewSignature(recv, types.NewTuple(params...), types.NewTuple(results...), isVariadic) +} + +// InterfaceType = "interface" "{" [ MethodList ] "}" . +// MethodList = Method { ";" Method } . +// Method = Name Signature . +// +// The methods of embedded interfaces are always "inlined" +// by the compiler and thus embedded interfaces are never +// visible in the export data. +// +func (p *parser) parseInterfaceType() types.Type { + var methods []*types.Func + + p.expectKeyword("interface") + p.expect('{') + for i := 0; p.tok != '}' && p.tok != scanner.EOF; i++ { + if i > 0 { + p.expect(';') + } + pkg, name := p.parseName(true) + sig := p.parseSignature(nil) + methods = append(methods, types.NewFunc(token.NoPos, pkg, name, sig)) + } + p.expect('}') + + // Complete requires the type's embedded interfaces to be fully defined, + // but we do not define any + return types.NewInterface(methods, nil).Complete() +} + +// ChanType = ( "chan" [ "<-" ] | "<-" "chan" ) Type . +// +func (p *parser) parseChanType() types.Type { + dir := types.SendRecv + if p.tok == scanner.Ident { + p.expectKeyword("chan") + if p.tok == '<' { + p.expectSpecial("<-") + dir = types.SendOnly + } + } else { + p.expectSpecial("<-") + p.expectKeyword("chan") + dir = types.RecvOnly + } + elem := p.parseType() + return types.NewChan(dir, elem) +} + +// Type = +// BasicType | TypeName | ArrayType | SliceType | StructType | +// PointerType | FuncType | InterfaceType | MapType | ChanType | +// "(" Type ")" . +// +// BasicType = ident . +// TypeName = ExportedName . +// SliceType = "[" "]" Type . +// PointerType = "*" Type . +// FuncType = "func" Signature . +// +func (p *parser) parseType() types.Type { + switch p.tok { + case scanner.Ident: + switch p.lit { + default: + return p.parseBasicType() + case "struct": + return p.parseStructType() + case "func": + // FuncType + p.next() + return p.parseSignature(nil) + case "interface": + return p.parseInterfaceType() + case "map": + return p.parseMapType() + case "chan": + return p.parseChanType() + } + case '@': + // TypeName + pkg, name := p.parseExportedName() + return declTypeName(pkg, name).Type() + case '[': + p.next() // look ahead + if p.tok == ']' { + // SliceType + p.next() + return types.NewSlice(p.parseType()) + } + return p.parseArrayType() + case '*': + // PointerType + p.next() + return types.NewPointer(p.parseType()) + case '<': + return p.parseChanType() + case '(': + // "(" Type ")" + p.next() + typ := p.parseType() + p.expect(')') + return typ + } + p.errorf("expected type, got %s (%q)", scanner.TokenString(p.tok), p.lit) + return nil +} + +// ---------------------------------------------------------------------------- +// Declarations + +// ImportDecl = "import" PackageName PackageId . +// +func (p *parser) parseImportDecl() { + p.expectKeyword("import") + name := p.parsePackageName() + p.getPkg(p.parsePackageId(), name) +} + +// int_lit = [ "+" | "-" ] { "0" ... "9" } . +// +func (p *parser) parseInt() string { + s := "" + switch p.tok { + case '-': + s = "-" + p.next() + case '+': + p.next() + } + return s + p.expect(scanner.Int) +} + +// number = int_lit [ "p" int_lit ] . +// +func (p *parser) parseNumber() (typ *types.Basic, val exact.Value) { + // mantissa + mant := exact.MakeFromLiteral(p.parseInt(), token.INT) + if mant == nil { + panic("invalid mantissa") + } + + if p.lit == "p" { + // exponent (base 2) + p.next() + exp, err := strconv.ParseInt(p.parseInt(), 10, 0) + if err != nil { + p.error(err) + } + if exp < 0 { + denom := exact.MakeInt64(1) + denom = exact.Shift(denom, token.SHL, uint(-exp)) + typ = types.Typ[types.UntypedFloat] + val = exact.BinaryOp(mant, token.QUO, denom) + return + } + if exp > 0 { + mant = exact.Shift(mant, token.SHL, uint(exp)) + } + typ = types.Typ[types.UntypedFloat] + val = mant + return + } + + typ = types.Typ[types.UntypedInt] + val = mant + return +} + +// ConstDecl = "const" ExportedName [ Type ] "=" Literal . +// Literal = bool_lit | int_lit | float_lit | complex_lit | rune_lit | string_lit . +// bool_lit = "true" | "false" . +// complex_lit = "(" float_lit "+" float_lit "i" ")" . +// rune_lit = "(" int_lit "+" int_lit ")" . +// string_lit = `"` { unicode_char } `"` . +// +func (p *parser) parseConstDecl() { + p.expectKeyword("const") + pkg, name := p.parseExportedName() + + var typ0 types.Type + if p.tok != '=' { + typ0 = p.parseType() + } + + p.expect('=') + var typ types.Type + var val exact.Value + switch p.tok { + case scanner.Ident: + // bool_lit + if p.lit != "true" && p.lit != "false" { + p.error("expected true or false") + } + typ = types.Typ[types.UntypedBool] + val = exact.MakeBool(p.lit == "true") + p.next() + + case '-', scanner.Int: + // int_lit + typ, val = p.parseNumber() + + case '(': + // complex_lit or rune_lit + p.next() + if p.tok == scanner.Char { + p.next() + p.expect('+') + typ = types.Typ[types.UntypedRune] + _, val = p.parseNumber() + p.expect(')') + break + } + _, re := p.parseNumber() + p.expect('+') + _, im := p.parseNumber() + p.expectKeyword("i") + p.expect(')') + typ = types.Typ[types.UntypedComplex] + val = exact.BinaryOp(re, token.ADD, exact.MakeImag(im)) + + case scanner.Char: + // rune_lit + typ = types.Typ[types.UntypedRune] + val = exact.MakeFromLiteral(p.lit, token.CHAR) + p.next() + + case scanner.String: + // string_lit + typ = types.Typ[types.UntypedString] + val = exact.MakeFromLiteral(p.lit, token.STRING) + p.next() + + default: + p.errorf("expected literal got %s", scanner.TokenString(p.tok)) + } + + if typ0 == nil { + typ0 = typ + } + + pkg.Scope().Insert(types.NewConst(token.NoPos, pkg, name, typ0, val)) +} + +// TypeDecl = "type" ExportedName Type . +// +func (p *parser) parseTypeDecl() { + p.expectKeyword("type") + pkg, name := p.parseExportedName() + obj := declTypeName(pkg, name) + + // The type object may have been imported before and thus already + // have a type associated with it. We still need to parse the type + // structure, but throw it away if the object already has a type. + // This ensures that all imports refer to the same type object for + // a given type declaration. + typ := p.parseType() + + if name := obj.Type().(*types.Named); name.Underlying() == nil { + name.SetUnderlying(typ) + } +} + +// VarDecl = "var" ExportedName Type . +// +func (p *parser) parseVarDecl() { + p.expectKeyword("var") + pkg, name := p.parseExportedName() + typ := p.parseType() + pkg.Scope().Insert(types.NewVar(token.NoPos, pkg, name, typ)) +} + +// Func = Signature [ Body ] . +// Body = "{" ... "}" . +// +func (p *parser) parseFunc(recv *types.Var) *types.Signature { + sig := p.parseSignature(recv) + if p.tok == '{' { + p.next() + for i := 1; i > 0; p.next() { + switch p.tok { + case '{': + i++ + case '}': + i-- + } + } + } + return sig +} + +// MethodDecl = "func" Receiver Name Func . +// Receiver = "(" ( identifier | "?" ) [ "*" ] ExportedName ")" . +// +func (p *parser) parseMethodDecl() { + // "func" already consumed + p.expect('(') + recv, _ := p.parseParameter() // receiver + p.expect(')') + + // determine receiver base type object + base := deref(recv.Type()).(*types.Named) + + // parse method name, signature, and possibly inlined body + _, name := p.parseName(true) + sig := p.parseFunc(recv) + + // methods always belong to the same package as the base type object + pkg := base.Obj().Pkg() + + // add method to type unless type was imported before + // and method exists already + // TODO(gri) This leads to a quadratic algorithm - ok for now because method counts are small. + base.AddMethod(types.NewFunc(token.NoPos, pkg, name, sig)) +} + +// FuncDecl = "func" ExportedName Func . +// +func (p *parser) parseFuncDecl() { + // "func" already consumed + pkg, name := p.parseExportedName() + typ := p.parseFunc(nil) + pkg.Scope().Insert(types.NewFunc(token.NoPos, pkg, name, typ)) +} + +// Decl = [ ImportDecl | ConstDecl | TypeDecl | VarDecl | FuncDecl | MethodDecl ] "\n" . +// +func (p *parser) parseDecl() { + if p.tok == scanner.Ident { + switch p.lit { + case "import": + p.parseImportDecl() + case "const": + p.parseConstDecl() + case "type": + p.parseTypeDecl() + case "var": + p.parseVarDecl() + case "func": + p.next() // look ahead + if p.tok == '(' { + p.parseMethodDecl() + } else { + p.parseFuncDecl() + } + } + } + p.expect('\n') +} + +// ---------------------------------------------------------------------------- +// Export + +// Export = "PackageClause { Decl } "$$" . +// PackageClause = "package" PackageName [ "safe" ] "\n" . +// +func (p *parser) parseExport() *types.Package { + p.expectKeyword("package") + name := p.parsePackageName() + if p.tok == scanner.Ident && p.lit == "safe" { + // package was compiled with -u option - ignore + p.next() + } + p.expect('\n') + + pkg := p.getPkg(p.id, name) + + for p.tok != '$' && p.tok != scanner.EOF { + p.parseDecl() + } + + if ch := p.scanner.Peek(); p.tok != '$' || ch != '$' { + // don't call next()/expect() since reading past the + // export data may cause scanner errors (e.g. NUL chars) + p.errorf("expected '$$', got %s %c", scanner.TokenString(p.tok), ch) + } + + if n := p.scanner.ErrorCount; n != 0 { + p.errorf("expected no scanner errors, got %d", n) + } + + // Record all referenced packages as imports. + var imports []*types.Package + for id, pkg2 := range p.localPkgs { + if id == p.id { + continue // avoid self-edge + } + imports = append(imports, pkg2) + } + sort.Sort(byPath(imports)) + pkg.SetImports(imports) + + // package was imported completely and without errors + pkg.MarkComplete() + + return pkg +} + +type byPath []*types.Package + +func (a byPath) Len() int { return len(a) } +func (a byPath) Swap(i, j int) { a[i], a[j] = a[j], a[i] } +func (a byPath) Less(i, j int) bool { return a[i].Path() < a[j].Path() } diff --git a/vendor/golang.org/x/tools/go/loader/cgo.go b/vendor/golang.org/x/tools/go/loader/cgo.go new file mode 100644 index 0000000..299e725 --- /dev/null +++ b/vendor/golang.org/x/tools/go/loader/cgo.go @@ -0,0 +1,199 @@ +package loader + +// This file handles cgo preprocessing of files containing `import "C"`. +// +// DESIGN +// +// The approach taken is to run the cgo processor on the package's +// CgoFiles and parse the output, faking the filenames of the +// resulting ASTs so that the synthetic file containing the C types is +// called "C" (e.g. "~/go/src/net/C") and the preprocessed files +// have their original names (e.g. "~/go/src/net/cgo_unix.go"), +// not the names of the actual temporary files. +// +// The advantage of this approach is its fidelity to 'go build'. The +// downside is that the token.Position.Offset for each AST node is +// incorrect, being an offset within the temporary file. Line numbers +// should still be correct because of the //line comments. +// +// The logic of this file is mostly plundered from the 'go build' +// tool, which also invokes the cgo preprocessor. +// +// +// REJECTED ALTERNATIVE +// +// An alternative approach that we explored is to extend go/types' +// Importer mechanism to provide the identity of the importing package +// so that each time `import "C"` appears it resolves to a different +// synthetic package containing just the objects needed in that case. +// The loader would invoke cgo but parse only the cgo_types.go file +// defining the package-level objects, discarding the other files +// resulting from preprocessing. +// +// The benefit of this approach would have been that source-level +// syntax information would correspond exactly to the original cgo +// file, with no preprocessing involved, making source tools like +// godoc, oracle, and eg happy. However, the approach was rejected +// due to the additional complexity it would impose on go/types. (It +// made for a beautiful demo, though.) +// +// cgo files, despite their *.go extension, are not legal Go source +// files per the specification since they may refer to unexported +// members of package "C" such as C.int. Also, a function such as +// C.getpwent has in effect two types, one matching its C type and one +// which additionally returns (errno C.int). The cgo preprocessor +// uses name mangling to distinguish these two functions in the +// processed code, but go/types would need to duplicate this logic in +// its handling of function calls, analogous to the treatment of map +// lookups in which y=m[k] and y,ok=m[k] are both legal. + +import ( + "fmt" + "go/ast" + "go/build" + "go/parser" + "go/token" + "io/ioutil" + "log" + "os" + "os/exec" + "path/filepath" + "regexp" + "strings" +) + +// processCgoFiles invokes the cgo preprocessor on bp.CgoFiles, parses +// the output and returns the resulting ASTs. +// +func processCgoFiles(bp *build.Package, fset *token.FileSet, DisplayPath func(path string) string, mode parser.Mode) ([]*ast.File, error) { + tmpdir, err := ioutil.TempDir("", strings.Replace(bp.ImportPath, "/", "_", -1)+"_C") + if err != nil { + return nil, err + } + defer os.RemoveAll(tmpdir) + + pkgdir := bp.Dir + if DisplayPath != nil { + pkgdir = DisplayPath(pkgdir) + } + + cgoFiles, cgoDisplayFiles, err := runCgo(bp, pkgdir, tmpdir) + if err != nil { + return nil, err + } + var files []*ast.File + for i := range cgoFiles { + rd, err := os.Open(cgoFiles[i]) + if err != nil { + return nil, err + } + defer rd.Close() + display := filepath.Join(bp.Dir, cgoDisplayFiles[i]) + f, err := parser.ParseFile(fset, display, rd, mode) + if err != nil { + return nil, err + } + files = append(files, f) + } + return files, nil +} + +var cgoRe = regexp.MustCompile(`[/\\:]`) + +// runCgo invokes the cgo preprocessor on bp.CgoFiles and returns two +// lists of files: the resulting processed files (in temporary +// directory tmpdir) and the corresponding names of the unprocessed files. +// +// runCgo is adapted from (*builder).cgo in +// $GOROOT/src/cmd/go/build.go, but these features are unsupported: +// pkg-config, Objective C, CGOPKGPATH, CGO_FLAGS. +// +func runCgo(bp *build.Package, pkgdir, tmpdir string) (files, displayFiles []string, err error) { + cgoCPPFLAGS, _, _, _ := cflags(bp, true) + _, cgoexeCFLAGS, _, _ := cflags(bp, false) + + if len(bp.CgoPkgConfig) > 0 { + return nil, nil, fmt.Errorf("cgo pkg-config not supported") + } + + // Allows including _cgo_export.h from .[ch] files in the package. + cgoCPPFLAGS = append(cgoCPPFLAGS, "-I", tmpdir) + + // _cgo_gotypes.go (displayed "C") contains the type definitions. + files = append(files, filepath.Join(tmpdir, "_cgo_gotypes.go")) + displayFiles = append(displayFiles, "C") + for _, fn := range bp.CgoFiles { + // "foo.cgo1.go" (displayed "foo.go") is the processed Go source. + f := cgoRe.ReplaceAllString(fn[:len(fn)-len("go")], "_") + files = append(files, filepath.Join(tmpdir, f+"cgo1.go")) + displayFiles = append(displayFiles, fn) + } + + var cgoflags []string + if bp.Goroot && bp.ImportPath == "runtime/cgo" { + cgoflags = append(cgoflags, "-import_runtime_cgo=false") + } + if bp.Goroot && bp.ImportPath == "runtime/race" || bp.ImportPath == "runtime/cgo" { + cgoflags = append(cgoflags, "-import_syscall=false") + } + + args := stringList( + "go", "tool", "cgo", "-objdir", tmpdir, cgoflags, "--", + cgoCPPFLAGS, cgoexeCFLAGS, bp.CgoFiles, + ) + if false { + log.Printf("Running cgo for package %q: %s (dir=%s)", bp.ImportPath, args, pkgdir) + } + cmd := exec.Command(args[0], args[1:]...) + cmd.Dir = pkgdir + cmd.Stdout = os.Stderr + cmd.Stderr = os.Stderr + if err := cmd.Run(); err != nil { + return nil, nil, fmt.Errorf("cgo failed: %s: %s", args, err) + } + + return files, displayFiles, nil +} + +// -- unmodified from 'go build' --------------------------------------- + +// Return the flags to use when invoking the C or C++ compilers, or cgo. +func cflags(p *build.Package, def bool) (cppflags, cflags, cxxflags, ldflags []string) { + var defaults string + if def { + defaults = "-g -O2" + } + + cppflags = stringList(envList("CGO_CPPFLAGS", ""), p.CgoCPPFLAGS) + cflags = stringList(envList("CGO_CFLAGS", defaults), p.CgoCFLAGS) + cxxflags = stringList(envList("CGO_CXXFLAGS", defaults), p.CgoCXXFLAGS) + ldflags = stringList(envList("CGO_LDFLAGS", defaults), p.CgoLDFLAGS) + return +} + +// envList returns the value of the given environment variable broken +// into fields, using the default value when the variable is empty. +func envList(key, def string) []string { + v := os.Getenv(key) + if v == "" { + v = def + } + return strings.Fields(v) +} + +// stringList's arguments should be a sequence of string or []string values. +// stringList flattens them into a single []string. +func stringList(args ...interface{}) []string { + var x []string + for _, arg := range args { + switch arg := arg.(type) { + case []string: + x = append(x, arg...) + case string: + x = append(x, arg) + default: + panic("stringList: invalid argument") + } + } + return x +} diff --git a/vendor/golang.org/x/tools/go/loader/doc.go b/vendor/golang.org/x/tools/go/loader/doc.go new file mode 100644 index 0000000..1ff4b15 --- /dev/null +++ b/vendor/golang.org/x/tools/go/loader/doc.go @@ -0,0 +1,189 @@ +// Copyright 2015 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package loader loads a complete Go program from source code, parsing +// and type-checking the initial packages plus their transitive closure +// of dependencies. The ASTs and the derived facts are retained for +// later use. +// +// THIS INTERFACE IS EXPERIMENTAL AND IS LIKELY TO CHANGE. +// +// The package defines two primary types: Config, which specifies a +// set of initial packages to load and various other options; and +// Program, which is the result of successfully loading the packages +// specified by a configuration. +// +// The configuration can be set directly, but *Config provides various +// convenience methods to simplify the common cases, each of which can +// be called any number of times. Finally, these are followed by a +// call to Load() to actually load and type-check the program. +// +// var conf loader.Config +// +// // Use the command-line arguments to specify +// // a set of initial packages to load from source. +// // See FromArgsUsage for help. +// rest, err := conf.FromArgs(os.Args[1:], wantTests) +// +// // Parse the specified files and create an ad hoc package with path "foo". +// // All files must have the same 'package' declaration. +// conf.CreateFromFilenames("foo", "foo.go", "bar.go") +// +// // Create an ad hoc package with path "foo" from +// // the specified already-parsed files. +// // All ASTs must have the same 'package' declaration. +// conf.CreateFromFiles("foo", parsedFiles) +// +// // Add "runtime" to the set of packages to be loaded. +// conf.Import("runtime") +// +// // Adds "fmt" and "fmt_test" to the set of packages +// // to be loaded. "fmt" will include *_test.go files. +// conf.ImportWithTests("fmt") +// +// // Finally, load all the packages specified by the configuration. +// prog, err := conf.Load() +// +// See examples_test.go for examples of API usage. +// +// +// CONCEPTS AND TERMINOLOGY +// +// An AD HOC package is one specified as a set of source files on the +// command line. In the simplest case, it may consist of a single file +// such as $GOROOT/src/net/http/triv.go. +// +// EXTERNAL TEST packages are those comprised of a set of *_test.go +// files all with the same 'package foo_test' declaration, all in the +// same directory. (go/build.Package calls these files XTestFiles.) +// +// An IMPORTABLE package is one that can be referred to by some import +// spec. The Path() of each importable package is unique within a +// Program. +// +// ad hoc packages and external test packages are NON-IMPORTABLE. The +// Path() of an ad hoc package is inferred from the package +// declarations of its files and is therefore not a unique package key. +// For example, Config.CreatePkgs may specify two initial ad hoc +// packages both called "main". +// +// An AUGMENTED package is an importable package P plus all the +// *_test.go files with same 'package foo' declaration as P. +// (go/build.Package calls these files TestFiles.) +// +// The INITIAL packages are those specified in the configuration. A +// DEPENDENCY is a package loaded to satisfy an import in an initial +// package or another dependency. +// +package loader + +// IMPLEMENTATION NOTES +// +// 'go test', in-package test files, and import cycles +// --------------------------------------------------- +// +// An external test package may depend upon members of the augmented +// package that are not in the unaugmented package, such as functions +// that expose internals. (See bufio/export_test.go for an example.) +// So, the loader must ensure that for each external test package +// it loads, it also augments the corresponding non-test package. +// +// The import graph over n unaugmented packages must be acyclic; the +// import graph over n-1 unaugmented packages plus one augmented +// package must also be acyclic. ('go test' relies on this.) But the +// import graph over n augmented packages may contain cycles. +// +// First, all the (unaugmented) non-test packages and their +// dependencies are imported in the usual way; the loader reports an +// error if it detects an import cycle. +// +// Then, each package P for which testing is desired is augmented by +// the list P' of its in-package test files, by calling +// (*types.Checker).Files. This arrangement ensures that P' may +// reference definitions within P, but P may not reference definitions +// within P'. Furthermore, P' may import any other package, including +// ones that depend upon P, without an import cycle error. +// +// Consider two packages A and B, both of which have lists of +// in-package test files we'll call A' and B', and which have the +// following import graph edges: +// B imports A +// B' imports A +// A' imports B +// This last edge would be expected to create an error were it not +// for the special type-checking discipline above. +// Cycles of size greater than two are possible. For example: +// compress/bzip2/bzip2_test.go (package bzip2) imports "io/ioutil" +// io/ioutil/tempfile_test.go (package ioutil) imports "regexp" +// regexp/exec_test.go (package regexp) imports "compress/bzip2" +// +// +// Concurrency +// ----------- +// +// Let us define the import dependency graph as follows. Each node is a +// list of files passed to (Checker).Files at once. Many of these lists +// are the production code of an importable Go package, so those nodes +// are labelled by the package's import path. The remaining nodes are +// ad hoc packages and lists of in-package *_test.go files that augment +// an importable package; those nodes have no label. +// +// The edges of the graph represent import statements appearing within a +// file. An edge connects a node (a list of files) to the node it +// imports, which is importable and thus always labelled. +// +// Loading is controlled by this dependency graph. +// +// To reduce I/O latency, we start loading a package's dependencies +// asynchronously as soon as we've parsed its files and enumerated its +// imports (scanImports). This performs a preorder traversal of the +// import dependency graph. +// +// To exploit hardware parallelism, we type-check unrelated packages in +// parallel, where "unrelated" means not ordered by the partial order of +// the import dependency graph. +// +// We use a concurrency-safe blocking cache (importer.imported) to +// record the results of type-checking, whether success or failure. An +// entry is created in this cache by startLoad the first time the +// package is imported. The first goroutine to request an entry becomes +// responsible for completing the task and broadcasting completion to +// subsequent requestors, which block until then. +// +// Type checking occurs in (parallel) postorder: we cannot type-check a +// set of files until we have loaded and type-checked all of their +// immediate dependencies (and thus all of their transitive +// dependencies). If the input were guaranteed free of import cycles, +// this would be trivial: we could simply wait for completion of the +// dependencies and then invoke the typechecker. +// +// But as we saw in the 'go test' section above, some cycles in the +// import graph over packages are actually legal, so long as the +// cycle-forming edge originates in the in-package test files that +// augment the package. This explains why the nodes of the import +// dependency graph are not packages, but lists of files: the unlabelled +// nodes avoid the cycles. Consider packages A and B where B imports A +// and A's in-package tests AT import B. The naively constructed import +// graph over packages would contain a cycle (A+AT) --> B --> (A+AT) but +// the graph over lists of files is AT --> B --> A, where AT is an +// unlabelled node. +// +// Awaiting completion of the dependencies in a cyclic graph would +// deadlock, so we must materialize the import dependency graph (as +// importer.graph) and check whether each import edge forms a cycle. If +// x imports y, and the graph already contains a path from y to x, then +// there is an import cycle, in which case the processing of x must not +// wait for the completion of processing of y. +// +// When the type-checker makes a callback (doImport) to the loader for a +// given import edge, there are two possible cases. In the normal case, +// the dependency has already been completely type-checked; doImport +// does a cache lookup and returns it. In the cyclic case, the entry in +// the cache is still necessarily incomplete, indicating a cycle. We +// perform the cycle check again to obtain the error message, and return +// the error. +// +// The result of using concurrency is about a 2.5x speedup for stdlib_test. + +// TODO(adonovan): overhaul the package documentation. diff --git a/vendor/golang.org/x/tools/go/loader/loader.go b/vendor/golang.org/x/tools/go/loader/loader.go new file mode 100644 index 0000000..bbacc5b --- /dev/null +++ b/vendor/golang.org/x/tools/go/loader/loader.go @@ -0,0 +1,966 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package loader + +// See doc.go for package documentation and implementation notes. + +import ( + "errors" + "fmt" + "go/ast" + "go/build" + "go/parser" + "go/token" + "os" + "sort" + "strings" + "sync" + "time" + + "golang.org/x/tools/go/ast/astutil" + "golang.org/x/tools/go/types" +) + +const trace = false // show timing info for type-checking + +// Config specifies the configuration for loading a whole program from +// Go source code. +// The zero value for Config is a ready-to-use default configuration. +type Config struct { + // Fset is the file set for the parser to use when loading the + // program. If nil, it may be lazily initialized by any + // method of Config. + Fset *token.FileSet + + // ParserMode specifies the mode to be used by the parser when + // loading source packages. + ParserMode parser.Mode + + // TypeChecker contains options relating to the type checker. + // + // The supplied IgnoreFuncBodies is not used; the effective + // value comes from the TypeCheckFuncBodies func below. + // The supplied Import function is not used either. + TypeChecker types.Config + + // TypeCheckFuncBodies is a predicate over package import + // paths. A package for which the predicate is false will + // have its package-level declarations type checked, but not + // its function bodies; this can be used to quickly load + // dependencies from source. If nil, all func bodies are type + // checked. + TypeCheckFuncBodies func(string) bool + + // If Build is non-nil, it is used to locate source packages. + // Otherwise &build.Default is used. + // + // By default, cgo is invoked to preprocess Go files that + // import the fake package "C". This behaviour can be + // disabled by setting CGO_ENABLED=0 in the environment prior + // to startup, or by setting Build.CgoEnabled=false. + Build *build.Context + + // The current directory, used for resolving relative package + // references such as "./go/loader". If empty, os.Getwd will be + // used instead. + Cwd string + + // If DisplayPath is non-nil, it is used to transform each + // file name obtained from Build.Import(). This can be used + // to prevent a virtualized build.Config's file names from + // leaking into the user interface. + DisplayPath func(path string) string + + // If AllowErrors is true, Load will return a Program even + // if some of the its packages contained I/O, parser or type + // errors; such errors are accessible via PackageInfo.Errors. If + // false, Load will fail if any package had an error. + AllowErrors bool + + // CreatePkgs specifies a list of non-importable initial + // packages to create. The resulting packages will appear in + // the corresponding elements of the Program.Created slice. + CreatePkgs []PkgSpec + + // ImportPkgs specifies a set of initial packages to load from + // source. The map keys are package import paths, used to + // locate the package relative to $GOROOT. + // + // The map value indicates whether to load tests. If true, Load + // will add and type-check two lists of files to the package: + // non-test files followed by in-package *_test.go files. In + // addition, it will append the external test package (if any) + // to Program.Created. + ImportPkgs map[string]bool + + // FindPackage is called during Load to create the build.Package + // for a given import path. If nil, a default implementation + // based on ctxt.Import is used. A client may use this hook to + // adapt to a proprietary build system that does not follow the + // "go build" layout conventions, for example. + // + // It must be safe to call concurrently from multiple goroutines. + FindPackage func(ctxt *build.Context, importPath string) (*build.Package, error) +} + +// A PkgSpec specifies a non-importable package to be created by Load. +// Files are processed first, but typically only one of Files and +// Filenames is provided. The path needn't be globally unique. +// +type PkgSpec struct { + Path string // import path ("" => use package declaration) + Files []*ast.File // ASTs of already-parsed files + Filenames []string // names of files to be parsed +} + +// A Program is a Go program loaded from source as specified by a Config. +type Program struct { + Fset *token.FileSet // the file set for this program + + // Created[i] contains the initial package whose ASTs or + // filenames were supplied by Config.CreatePkgs[i], followed by + // the external test package, if any, of each package in + // Config.ImportPkgs ordered by ImportPath. + Created []*PackageInfo + + // Imported contains the initially imported packages, + // as specified by Config.ImportPkgs. + Imported map[string]*PackageInfo + + // AllPackages contains the PackageInfo of every package + // encountered by Load: all initial packages and all + // dependencies, including incomplete ones. + AllPackages map[*types.Package]*PackageInfo + + // importMap is the canonical mapping of import paths to + // packages. It contains all Imported initial packages, but not + // Created ones, and all imported dependencies. + importMap map[string]*types.Package +} + +// PackageInfo holds the ASTs and facts derived by the type-checker +// for a single package. +// +// Not mutated once exposed via the API. +// +type PackageInfo struct { + Pkg *types.Package + Importable bool // true if 'import "Pkg.Path()"' would resolve to this + TransitivelyErrorFree bool // true if Pkg and all its dependencies are free of errors + Files []*ast.File // syntax trees for the package's files + Errors []error // non-nil if the package had errors + types.Info // type-checker deductions. + + checker *types.Checker // transient type-checker state + errorFunc func(error) +} + +func (info *PackageInfo) String() string { return info.Pkg.Path() } + +func (info *PackageInfo) appendError(err error) { + if info.errorFunc != nil { + info.errorFunc(err) + } else { + fmt.Fprintln(os.Stderr, err) + } + info.Errors = append(info.Errors, err) +} + +func (conf *Config) fset() *token.FileSet { + if conf.Fset == nil { + conf.Fset = token.NewFileSet() + } + return conf.Fset +} + +// ParseFile is a convenience function (intended for testing) that invokes +// the parser using the Config's FileSet, which is initialized if nil. +// +// src specifies the parser input as a string, []byte, or io.Reader, and +// filename is its apparent name. If src is nil, the contents of +// filename are read from the file system. +// +func (conf *Config) ParseFile(filename string, src interface{}) (*ast.File, error) { + // TODO(adonovan): use conf.build() etc like parseFiles does. + return parser.ParseFile(conf.fset(), filename, src, conf.ParserMode) +} + +// FromArgsUsage is a partial usage message that applications calling +// FromArgs may wish to include in their -help output. +const FromArgsUsage = ` + is a list of arguments denoting a set of initial packages. +It may take one of two forms: + +1. A list of *.go source files. + + All of the specified files are loaded, parsed and type-checked + as a single package. All the files must belong to the same directory. + +2. A list of import paths, each denoting a package. + + The package's directory is found relative to the $GOROOT and + $GOPATH using similar logic to 'go build', and the *.go files in + that directory are loaded, parsed and type-checked as a single + package. + + In addition, all *_test.go files in the directory are then loaded + and parsed. Those files whose package declaration equals that of + the non-*_test.go files are included in the primary package. Test + files whose package declaration ends with "_test" are type-checked + as another package, the 'external' test package, so that a single + import path may denote two packages. (Whether this behaviour is + enabled is tool-specific, and may depend on additional flags.) + +A '--' argument terminates the list of packages. +` + +// FromArgs interprets args as a set of initial packages to load from +// source and updates the configuration. It returns the list of +// unconsumed arguments. +// +// It is intended for use in command-line interfaces that require a +// set of initial packages to be specified; see FromArgsUsage message +// for details. +// +// Only superficial errors are reported at this stage; errors dependent +// on I/O are detected during Load. +// +func (conf *Config) FromArgs(args []string, xtest bool) ([]string, error) { + var rest []string + for i, arg := range args { + if arg == "--" { + rest = args[i+1:] + args = args[:i] + break // consume "--" and return the remaining args + } + } + + if len(args) > 0 && strings.HasSuffix(args[0], ".go") { + // Assume args is a list of a *.go files + // denoting a single ad hoc package. + for _, arg := range args { + if !strings.HasSuffix(arg, ".go") { + return nil, fmt.Errorf("named files must be .go files: %s", arg) + } + } + conf.CreateFromFilenames("", args...) + } else { + // Assume args are directories each denoting a + // package and (perhaps) an external test, iff xtest. + for _, arg := range args { + if xtest { + conf.ImportWithTests(arg) + } else { + conf.Import(arg) + } + } + } + + return rest, nil +} + +// CreateFromFilenames is a convenience function that adds +// a conf.CreatePkgs entry to create a package of the specified *.go +// files. +// +func (conf *Config) CreateFromFilenames(path string, filenames ...string) { + conf.CreatePkgs = append(conf.CreatePkgs, PkgSpec{Path: path, Filenames: filenames}) +} + +// CreateFromFiles is a convenience function that adds a conf.CreatePkgs +// entry to create package of the specified path and parsed files. +// +func (conf *Config) CreateFromFiles(path string, files ...*ast.File) { + conf.CreatePkgs = append(conf.CreatePkgs, PkgSpec{Path: path, Files: files}) +} + +// ImportWithTests is a convenience function that adds path to +// ImportPkgs, the set of initial source packages located relative to +// $GOPATH. The package will be augmented by any *_test.go files in +// its directory that contain a "package x" (not "package x_test") +// declaration. +// +// In addition, if any *_test.go files contain a "package x_test" +// declaration, an additional package comprising just those files will +// be added to CreatePkgs. +// +func (conf *Config) ImportWithTests(path string) { conf.addImport(path, true) } + +// Import is a convenience function that adds path to ImportPkgs, the +// set of initial packages that will be imported from source. +// +func (conf *Config) Import(path string) { conf.addImport(path, false) } + +func (conf *Config) addImport(path string, tests bool) { + if path == "C" || path == "unsafe" { + return // ignore; not a real package + } + if conf.ImportPkgs == nil { + conf.ImportPkgs = make(map[string]bool) + } + conf.ImportPkgs[path] = conf.ImportPkgs[path] || tests +} + +// PathEnclosingInterval returns the PackageInfo and ast.Node that +// contain source interval [start, end), and all the node's ancestors +// up to the AST root. It searches all ast.Files of all packages in prog. +// exact is defined as for astutil.PathEnclosingInterval. +// +// The zero value is returned if not found. +// +func (prog *Program) PathEnclosingInterval(start, end token.Pos) (pkg *PackageInfo, path []ast.Node, exact bool) { + for _, info := range prog.AllPackages { + for _, f := range info.Files { + if f.Pos() == token.NoPos { + // This can happen if the parser saw + // too many errors and bailed out. + // (Use parser.AllErrors to prevent that.) + continue + } + if !tokenFileContainsPos(prog.Fset.File(f.Pos()), start) { + continue + } + if path, exact := astutil.PathEnclosingInterval(f, start, end); path != nil { + return info, path, exact + } + } + } + return nil, nil, false +} + +// InitialPackages returns a new slice containing the set of initial +// packages (Created + Imported) in unspecified order. +// +func (prog *Program) InitialPackages() []*PackageInfo { + infos := make([]*PackageInfo, 0, len(prog.Created)+len(prog.Imported)) + infos = append(infos, prog.Created...) + for _, info := range prog.Imported { + infos = append(infos, info) + } + return infos +} + +// Package returns the ASTs and results of type checking for the +// specified package. +func (prog *Program) Package(path string) *PackageInfo { + if info, ok := prog.AllPackages[prog.importMap[path]]; ok { + return info + } + for _, info := range prog.Created { + if path == info.Pkg.Path() { + return info + } + } + return nil +} + +// ---------- Implementation ---------- + +// importer holds the working state of the algorithm. +type importer struct { + conf *Config // the client configuration + start time.Time // for logging + + progMu sync.Mutex // guards prog + prog *Program // the resulting program + + importedMu sync.Mutex // guards imported + imported map[string]*importInfo // all imported packages (incl. failures) by import path + + // import dependency graph: graph[x][y] => x imports y + // + // Since non-importable packages cannot be cyclic, we ignore + // their imports, thus we only need the subgraph over importable + // packages. Nodes are identified by their import paths. + graphMu sync.Mutex + graph map[string]map[string]bool +} + +// importInfo tracks the success or failure of a single import. +// +// Upon completion, exactly one of info and err is non-nil: +// info on successful creation of a package, err otherwise. +// A successful package may still contain type errors. +// +type importInfo struct { + path string // import path + mu sync.Mutex // guards the following fields prior to completion + info *PackageInfo // results of typechecking (including errors) + err error // reason for failure to create a package + complete sync.Cond // complete condition is that one of info, err is non-nil. +} + +// awaitCompletion blocks until ii is complete, +// i.e. the info and err fields are safe to inspect without a lock. +// It is concurrency-safe and idempotent. +func (ii *importInfo) awaitCompletion() { + ii.mu.Lock() + for ii.info == nil && ii.err == nil { + ii.complete.Wait() + } + ii.mu.Unlock() +} + +// Complete marks ii as complete. +// Its info and err fields will not be subsequently updated. +func (ii *importInfo) Complete(info *PackageInfo, err error) { + if info == nil && err == nil { + panic("Complete(nil, nil)") + } + ii.mu.Lock() + ii.info = info + ii.err = err + ii.complete.Broadcast() + ii.mu.Unlock() +} + +// Load creates the initial packages specified by conf.{Create,Import}Pkgs, +// loading their dependencies packages as needed. +// +// On success, Load returns a Program containing a PackageInfo for +// each package. On failure, it returns an error. +// +// If AllowErrors is true, Load will return a Program even if some +// packages contained I/O, parser or type errors, or if dependencies +// were missing. (Such errors are accessible via PackageInfo.Errors. If +// false, Load will fail if any package had an error. +// +// It is an error if no packages were loaded. +// +func (conf *Config) Load() (*Program, error) { + // Create a simple default error handler for parse/type errors. + if conf.TypeChecker.Error == nil { + conf.TypeChecker.Error = func(e error) { fmt.Fprintln(os.Stderr, e) } + } + + // Set default working directory for relative package references. + if conf.Cwd == "" { + var err error + conf.Cwd, err = os.Getwd() + if err != nil { + return nil, err + } + } + + // Install default FindPackage hook using go/build logic. + if conf.FindPackage == nil { + conf.FindPackage = func(ctxt *build.Context, path string) (*build.Package, error) { + // TODO(adonovan): cache calls to build.Import + // so we don't do it three times per test package. + bp, err := ctxt.Import(path, conf.Cwd, 0) + if _, ok := err.(*build.NoGoError); ok { + return bp, nil // empty directory is not an error + } + return bp, err + } + } + + prog := &Program{ + Fset: conf.fset(), + Imported: make(map[string]*PackageInfo), + importMap: make(map[string]*types.Package), + AllPackages: make(map[*types.Package]*PackageInfo), + } + + imp := importer{ + conf: conf, + prog: prog, + imported: make(map[string]*importInfo), + start: time.Now(), + graph: make(map[string]map[string]bool), + } + + // -- loading proper (concurrent phase) -------------------------------- + + var errpkgs []string // packages that contained errors + + // Load the initially imported packages and their dependencies, + // in parallel. + for _, ii := range imp.loadAll("", conf.ImportPkgs) { + if ii.err != nil { + conf.TypeChecker.Error(ii.err) // failed to create package + errpkgs = append(errpkgs, ii.path) + continue + } + prog.Imported[ii.info.Pkg.Path()] = ii.info + } + + // Augment the designated initial packages by their tests. + // Dependencies are loaded in parallel. + var xtestPkgs []*build.Package + for path, augment := range conf.ImportPkgs { + if !augment { + continue + } + + bp, err := conf.FindPackage(conf.build(), path) + if err != nil { + // Package not found, or can't even parse package declaration. + // Already reported by previous loop; ignore it. + continue + } + + // Needs external test package? + if len(bp.XTestGoFiles) > 0 { + xtestPkgs = append(xtestPkgs, bp) + } + + imp.importedMu.Lock() // (unnecessary, we're sequential here) + ii, ok := imp.imported[path] + // Paranoid checks added due to issue #11012. + if !ok { + // Unreachable. + // The previous loop called loadAll and thus + // startLoad for each path in ImportPkgs, which + // populates imp.imported[path] with a non-zero value. + panic(fmt.Sprintf("imported[%q] not found", path)) + } + if ii == nil { + // Unreachable. + // The ii values in this loop are the same as in + // the previous loop, which enforced the invariant + // that at least one of ii.err and ii.info is non-nil. + panic(fmt.Sprintf("imported[%q] == nil", path)) + } + if ii.err != nil { + // The sole possible cause is failure of the + // FindPackage call in (*importer).load, + // but we rechecked that condition above. + // Perhaps the state of the file system changed + // in between? Seems unlikely. + panic(fmt.Sprintf("imported[%q].err = %v", path, ii.err)) + } + if ii.info == nil { + // Unreachable. + // Complete has this postcondition: + // ii.err != nil || ii.info != nil + // and we know that ii.err == nil here. + panic(fmt.Sprintf("imported[%q].info = nil", path)) + } + info := ii.info + imp.importedMu.Unlock() + + // Parse the in-package test files. + files, errs := imp.conf.parsePackageFiles(bp, 't') + for _, err := range errs { + info.appendError(err) + } + + // The test files augmenting package P cannot be imported, + // but may import packages that import P, + // so we must disable the cycle check. + imp.addFiles(info, files, false) + } + + createPkg := func(path string, files []*ast.File, errs []error) { + info := imp.newPackageInfo(path) + for _, err := range errs { + info.appendError(err) + } + + // Ad hoc packages are non-importable, + // so no cycle check is needed. + // addFiles loads dependencies in parallel. + imp.addFiles(info, files, false) + prog.Created = append(prog.Created, info) + } + + // Create packages specified by conf.CreatePkgs. + for _, cp := range conf.CreatePkgs { + files, errs := parseFiles(conf.fset(), conf.build(), nil, ".", cp.Filenames, conf.ParserMode) + files = append(files, cp.Files...) + + path := cp.Path + if path == "" { + if len(files) > 0 { + path = files[0].Name.Name + } else { + path = "(unnamed)" + } + } + createPkg(path, files, errs) + } + + // Create external test packages. + sort.Sort(byImportPath(xtestPkgs)) + for _, bp := range xtestPkgs { + files, errs := imp.conf.parsePackageFiles(bp, 'x') + createPkg(bp.ImportPath+"_test", files, errs) + } + + // -- finishing up (sequential) ---------------------------------------- + + if len(prog.Imported)+len(prog.Created) == 0 { + return nil, errors.New("no initial packages were loaded") + } + + // Create infos for indirectly imported packages. + // e.g. incomplete packages without syntax, loaded from export data. + for _, obj := range prog.importMap { + info := prog.AllPackages[obj] + if info == nil { + prog.AllPackages[obj] = &PackageInfo{Pkg: obj, Importable: true} + } else { + // finished + info.checker = nil + info.errorFunc = nil + } + } + + if !conf.AllowErrors { + // Report errors in indirectly imported packages. + for _, info := range prog.AllPackages { + if len(info.Errors) > 0 { + errpkgs = append(errpkgs, info.Pkg.Path()) + } + } + if errpkgs != nil { + var more string + if len(errpkgs) > 3 { + more = fmt.Sprintf(" and %d more", len(errpkgs)-3) + errpkgs = errpkgs[:3] + } + return nil, fmt.Errorf("couldn't load packages due to errors: %s%s", + strings.Join(errpkgs, ", "), more) + } + } + + markErrorFreePackages(prog.AllPackages) + + return prog, nil +} + +type byImportPath []*build.Package + +func (b byImportPath) Len() int { return len(b) } +func (b byImportPath) Less(i, j int) bool { return b[i].ImportPath < b[j].ImportPath } +func (b byImportPath) Swap(i, j int) { b[i], b[j] = b[j], b[i] } + +// markErrorFreePackages sets the TransitivelyErrorFree flag on all +// applicable packages. +func markErrorFreePackages(allPackages map[*types.Package]*PackageInfo) { + // Build the transpose of the import graph. + importedBy := make(map[*types.Package]map[*types.Package]bool) + for P := range allPackages { + for _, Q := range P.Imports() { + clients, ok := importedBy[Q] + if !ok { + clients = make(map[*types.Package]bool) + importedBy[Q] = clients + } + clients[P] = true + } + } + + // Find all packages reachable from some error package. + reachable := make(map[*types.Package]bool) + var visit func(*types.Package) + visit = func(p *types.Package) { + if !reachable[p] { + reachable[p] = true + for q := range importedBy[p] { + visit(q) + } + } + } + for _, info := range allPackages { + if len(info.Errors) > 0 { + visit(info.Pkg) + } + } + + // Mark the others as "transitively error-free". + for _, info := range allPackages { + if !reachable[info.Pkg] { + info.TransitivelyErrorFree = true + } + } +} + +// build returns the effective build context. +func (conf *Config) build() *build.Context { + if conf.Build != nil { + return conf.Build + } + return &build.Default +} + +// parsePackageFiles enumerates the files belonging to package path, +// then loads, parses and returns them, plus a list of I/O or parse +// errors that were encountered. +// +// 'which' indicates which files to include: +// 'g': include non-test *.go source files (GoFiles + processed CgoFiles) +// 't': include in-package *_test.go source files (TestGoFiles) +// 'x': include external *_test.go source files. (XTestGoFiles) +// +func (conf *Config) parsePackageFiles(bp *build.Package, which rune) ([]*ast.File, []error) { + var filenames []string + switch which { + case 'g': + filenames = bp.GoFiles + case 't': + filenames = bp.TestGoFiles + case 'x': + filenames = bp.XTestGoFiles + default: + panic(which) + } + + files, errs := parseFiles(conf.fset(), conf.build(), conf.DisplayPath, bp.Dir, filenames, conf.ParserMode) + + // Preprocess CgoFiles and parse the outputs (sequentially). + if which == 'g' && bp.CgoFiles != nil { + cgofiles, err := processCgoFiles(bp, conf.fset(), conf.DisplayPath, conf.ParserMode) + if err != nil { + errs = append(errs, err) + } else { + files = append(files, cgofiles...) + } + } + + return files, errs +} + +// doImport imports the package denoted by path. +// It implements the types.Importer signature. +// +// imports is the type-checker's package canonicalization map. +// +// It returns an error if a package could not be created +// (e.g. go/build or parse error), but type errors are reported via +// the types.Config.Error callback (the first of which is also saved +// in the package's PackageInfo). +// +// Idempotent. +// +func (imp *importer) doImport(from *PackageInfo, to string) (*types.Package, error) { + // Package unsafe is handled specially, and has no PackageInfo. + // TODO(adonovan): move this check into go/types? + if to == "unsafe" { + return types.Unsafe, nil + } + if to == "C" { + // This should be unreachable, but ad hoc packages are + // not currently subject to cgo preprocessing. + // See https://github.com/golang/go/issues/11627. + return nil, fmt.Errorf(`the loader doesn't cgo-process ad hoc packages like %q; see Go issue 11627`, + from.Pkg.Path()) + } + + imp.importedMu.Lock() + ii := imp.imported[to] + imp.importedMu.Unlock() + if ii == nil { + panic("internal error: unexpected import: " + to) + } + if ii.err != nil { + return nil, ii.err + } + if ii.info != nil { + return ii.info.Pkg, nil + } + + // Import of incomplete package: this indicates a cycle. + fromPath := from.Pkg.Path() + if cycle := imp.findPath(to, fromPath); cycle != nil { + cycle = append([]string{fromPath}, cycle...) + return nil, fmt.Errorf("import cycle: %s", strings.Join(cycle, " -> ")) + } + + panic("internal error: import of incomplete (yet acyclic) package: " + fromPath) +} + +// loadAll loads, parses, and type-checks the specified packages in +// parallel and returns their completed importInfos in unspecified order. +// +// fromPath is the import path of the importing package, if it is +// importable, "" otherwise. It is used for cycle detection. +// +func (imp *importer) loadAll(fromPath string, paths map[string]bool) []*importInfo { + result := make([]*importInfo, 0, len(paths)) + for path := range paths { + result = append(result, imp.startLoad(path)) + } + + if fromPath != "" { + // We're loading a set of imports. + // + // We must record graph edges from the importing package + // to its dependencies, and check for cycles. + imp.graphMu.Lock() + deps, ok := imp.graph[fromPath] + if !ok { + deps = make(map[string]bool) + imp.graph[fromPath] = deps + } + for path := range paths { + deps[path] = true + } + imp.graphMu.Unlock() + } + + for _, ii := range result { + if fromPath != "" { + if cycle := imp.findPath(ii.path, fromPath); cycle != nil { + // Cycle-forming import: we must not await its + // completion since it would deadlock. + // + // We don't record the error in ii since + // the error is really associated with the + // cycle-forming edge, not the package itself. + // (Also it would complicate the + // invariants of importPath completion.) + if trace { + fmt.Fprintln(os.Stderr, "import cycle: %q", cycle) + } + continue + } + } + ii.awaitCompletion() + } + return result +} + +// findPath returns an arbitrary path from 'from' to 'to' in the import +// graph, or nil if there was none. +func (imp *importer) findPath(from, to string) []string { + imp.graphMu.Lock() + defer imp.graphMu.Unlock() + + seen := make(map[string]bool) + var search func(stack []string, importPath string) []string + search = func(stack []string, importPath string) []string { + if !seen[importPath] { + seen[importPath] = true + stack = append(stack, importPath) + if importPath == to { + return stack + } + for x := range imp.graph[importPath] { + if p := search(stack, x); p != nil { + return p + } + } + } + return nil + } + return search(make([]string, 0, 20), from) +} + +// startLoad initiates the loading, parsing and type-checking of the +// specified package and its dependencies, if it has not already begun. +// +// It returns an importInfo, not necessarily in a completed state. The +// caller must call awaitCompletion() before accessing its info and err +// fields. +// +// startLoad is concurrency-safe and idempotent. +// +func (imp *importer) startLoad(path string) *importInfo { + imp.importedMu.Lock() + ii, ok := imp.imported[path] + if !ok { + ii = &importInfo{path: path} + ii.complete.L = &ii.mu + imp.imported[path] = ii + go func() { + ii.Complete(imp.load(path)) + }() + } + imp.importedMu.Unlock() + + return ii +} + +// load implements package loading by parsing Go source files +// located by go/build. +// +func (imp *importer) load(path string) (*PackageInfo, error) { + bp, err := imp.conf.FindPackage(imp.conf.build(), path) + if err != nil { + return nil, err // package not found + } + info := imp.newPackageInfo(bp.ImportPath) + info.Importable = true + files, errs := imp.conf.parsePackageFiles(bp, 'g') + for _, err := range errs { + info.appendError(err) + } + + imp.addFiles(info, files, true) + + imp.progMu.Lock() + imp.prog.importMap[path] = info.Pkg + imp.progMu.Unlock() + + return info, nil +} + +// addFiles adds and type-checks the specified files to info, loading +// their dependencies if needed. The order of files determines the +// package initialization order. It may be called multiple times on the +// same package. Errors are appended to the info.Errors field. +// +// cycleCheck determines whether the imports within files create +// dependency edges that should be checked for potential cycles. +// +func (imp *importer) addFiles(info *PackageInfo, files []*ast.File, cycleCheck bool) { + info.Files = append(info.Files, files...) + + // Ensure the dependencies are loaded, in parallel. + var fromPath string + if cycleCheck { + fromPath = info.Pkg.Path() + } + imp.loadAll(fromPath, scanImports(files)) + + if trace { + fmt.Fprintf(os.Stderr, "%s: start %q (%d)\n", + time.Since(imp.start), info.Pkg.Path(), len(files)) + } + + // Ignore the returned (first) error since we + // already collect them all in the PackageInfo. + info.checker.Files(files) + + if trace { + fmt.Fprintf(os.Stderr, "%s: stop %q\n", + time.Since(imp.start), info.Pkg.Path()) + } +} + +func (imp *importer) newPackageInfo(path string) *PackageInfo { + pkg := types.NewPackage(path, "") + info := &PackageInfo{ + Pkg: pkg, + Info: types.Info{ + Types: make(map[ast.Expr]types.TypeAndValue), + Defs: make(map[*ast.Ident]types.Object), + Uses: make(map[*ast.Ident]types.Object), + Implicits: make(map[ast.Node]types.Object), + Scopes: make(map[ast.Node]*types.Scope), + Selections: make(map[*ast.SelectorExpr]*types.Selection), + }, + errorFunc: imp.conf.TypeChecker.Error, + } + + // Copy the types.Config so we can vary it across PackageInfos. + tc := imp.conf.TypeChecker + tc.IgnoreFuncBodies = false + if f := imp.conf.TypeCheckFuncBodies; f != nil { + tc.IgnoreFuncBodies = !f(path) + } + tc.Import = func(_ map[string]*types.Package, to string) (*types.Package, error) { + return imp.doImport(info, to) + } + tc.Error = info.appendError // appendError wraps the user's Error function + + info.checker = types.NewChecker(&tc, imp.conf.fset(), pkg, &info.Info) + imp.progMu.Lock() + imp.prog.AllPackages[pkg] = info + imp.progMu.Unlock() + return info +} diff --git a/vendor/golang.org/x/tools/go/loader/util.go b/vendor/golang.org/x/tools/go/loader/util.go new file mode 100644 index 0000000..0404e99 --- /dev/null +++ b/vendor/golang.org/x/tools/go/loader/util.go @@ -0,0 +1,124 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package loader + +import ( + "go/ast" + "go/build" + "go/parser" + "go/token" + "io" + "os" + "strconv" + "sync" + + "golang.org/x/tools/go/buildutil" +) + +// We use a counting semaphore to limit +// the number of parallel I/O calls per process. +var sema = make(chan bool, 10) + +// parseFiles parses the Go source files within directory dir and +// returns the ASTs of the ones that could be at least partially parsed, +// along with a list of I/O and parse errors encountered. +// +// I/O is done via ctxt, which may specify a virtual file system. +// displayPath is used to transform the filenames attached to the ASTs. +// +func parseFiles(fset *token.FileSet, ctxt *build.Context, displayPath func(string) string, dir string, files []string, mode parser.Mode) ([]*ast.File, []error) { + if displayPath == nil { + displayPath = func(path string) string { return path } + } + var wg sync.WaitGroup + n := len(files) + parsed := make([]*ast.File, n) + errors := make([]error, n) + for i, file := range files { + if !buildutil.IsAbsPath(ctxt, file) { + file = buildutil.JoinPath(ctxt, dir, file) + } + wg.Add(1) + go func(i int, file string) { + sema <- true // wait + defer func() { + wg.Done() + <-sema // signal + }() + var rd io.ReadCloser + var err error + if ctxt.OpenFile != nil { + rd, err = ctxt.OpenFile(file) + } else { + rd, err = os.Open(file) + } + if err != nil { + errors[i] = err // open failed + return + } + + // ParseFile may return both an AST and an error. + parsed[i], errors[i] = parser.ParseFile(fset, displayPath(file), rd, mode) + rd.Close() + }(i, file) + } + wg.Wait() + + // Eliminate nils, preserving order. + var o int + for _, f := range parsed { + if f != nil { + parsed[o] = f + o++ + } + } + parsed = parsed[:o] + + o = 0 + for _, err := range errors { + if err != nil { + errors[o] = err + o++ + } + } + errors = errors[:o] + + return parsed, errors +} + +// scanImports returns the set of all package import paths from all +// import specs in the specified files. +func scanImports(files []*ast.File) map[string]bool { + imports := make(map[string]bool) + for _, f := range files { + for _, decl := range f.Decls { + if decl, ok := decl.(*ast.GenDecl); ok && decl.Tok == token.IMPORT { + for _, spec := range decl.Specs { + spec := spec.(*ast.ImportSpec) + + // NB: do not assume the program is well-formed! + path, err := strconv.Unquote(spec.Path.Value) + if err != nil { + continue // quietly ignore the error + } + if path == "C" || path == "unsafe" { + continue // skip pseudo packages + } + imports[path] = true + } + } + } + } + return imports +} + +// ---------- Internal helpers ---------- + +// TODO(adonovan): make this a method: func (*token.File) Contains(token.Pos) +func tokenFileContainsPos(f *token.File, pos token.Pos) bool { + p := int(pos) + base := f.Base() + return base <= p && p < base+f.Size() +} diff --git a/vendor/golang.org/x/tools/go/pointer/TODO b/vendor/golang.org/x/tools/go/pointer/TODO new file mode 100644 index 0000000..f95e706 --- /dev/null +++ b/vendor/golang.org/x/tools/go/pointer/TODO @@ -0,0 +1,33 @@ +-*- text -*- + +Pointer analysis to-do list +=========================== + +CONSTRAINT GENERATION: +- support reflection: + - a couple of operators are missing + - reflect.Values may contain lvalues (CanAddr) +- implement native intrinsics. These vary by platform. +- add to pts(a.panic) a label representing all runtime panics, e.g. + runtime.{TypeAssertionError,errorString,errorCString}. + +OPTIMISATIONS +- pre-solver: + pointer equivalence: extend HVN to HRU + location equivalence +- solver: HCD, LCD. +- experiment with map+slice worklist in lieu of bitset. + It may have faster insert. + +MISC: +- Test on all platforms. + Currently we assume these go/build tags: linux, amd64, !cgo. + +MAINTAINABILITY +- Think about ways to make debugging this code easier. PTA logs + routinely exceed a million lines and require training to read. + +BUGS: +- There's a crash bug in stdlib_test + reflection, rVCallConstraint. + + diff --git a/vendor/golang.org/x/tools/go/pointer/analysis.go b/vendor/golang.org/x/tools/go/pointer/analysis.go new file mode 100644 index 0000000..d02e536 --- /dev/null +++ b/vendor/golang.org/x/tools/go/pointer/analysis.go @@ -0,0 +1,447 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package pointer + +// This file defines the main datatypes and Analyze function of the pointer analysis. + +import ( + "fmt" + "go/token" + "io" + "os" + "reflect" + "runtime" + "runtime/debug" + "sort" + + "golang.org/x/tools/go/callgraph" + "golang.org/x/tools/go/ssa" + "golang.org/x/tools/go/types" + "golang.org/x/tools/go/types/typeutil" +) + +const ( + // optimization options; enable all when committing + optRenumber = true // enable renumbering optimization (makes logs hard to read) + optHVN = true // enable pointer equivalence via Hash-Value Numbering + + // debugging options; disable all when committing + debugHVN = false // enable assertions in HVN + debugHVNVerbose = false // enable extra HVN logging + debugHVNCrossCheck = false // run solver with/without HVN and compare (caveats below) + debugTimers = false // show running time of each phase +) + +// object.flags bitmask values. +const ( + otTagged = 1 << iota // type-tagged object + otIndirect // type-tagged object with indirect payload + otFunction // function object +) + +// An object represents a contiguous block of memory to which some +// (generalized) pointer may point. +// +// (Note: most variables called 'obj' are not *objects but nodeids +// such that a.nodes[obj].obj != nil.) +// +type object struct { + // flags is a bitset of the node type (ot*) flags defined above. + flags uint32 + + // Number of following nodes belonging to the same "object" + // allocation. Zero for all other nodes. + size uint32 + + // data describes this object; it has one of these types: + // + // ssa.Value for an object allocated by an SSA operation. + // types.Type for an rtype instance object or *rtype-tagged object. + // string for an instrinsic object, e.g. the array behind os.Args. + // nil for an object allocated by an instrinsic. + // (cgn provides the identity of the intrinsic.) + data interface{} + + // The call-graph node (=context) in which this object was allocated. + // May be nil for global objects: Global, Const, some Functions. + cgn *cgnode +} + +// nodeid denotes a node. +// It is an index within analysis.nodes. +// We use small integers, not *node pointers, for many reasons: +// - they are smaller on 64-bit systems. +// - sets of them can be represented compactly in bitvectors or BDDs. +// - order matters; a field offset can be computed by simple addition. +type nodeid uint32 + +// A node is an equivalence class of memory locations. +// Nodes may be pointers, pointed-to locations, neither, or both. +// +// Nodes that are pointed-to locations ("labels") have an enclosing +// object (see analysis.enclosingObject). +// +type node struct { + // If non-nil, this node is the start of an object + // (addressable memory location). + // The following obj.size nodes implicitly belong to the object; + // they locate their object by scanning back. + obj *object + + // The type of the field denoted by this node. Non-aggregate, + // unless this is an tagged.T node (i.e. the thing + // pointed to by an interface) in which case typ is that type. + typ types.Type + + // subelement indicates which directly embedded subelement of + // an object of aggregate type (struct, tuple, array) this is. + subelement *fieldInfo // e.g. ".a.b[*].c" + + // Solver state for the canonical node of this pointer- + // equivalence class. Each node is created with its own state + // but they become shared after HVN. + solve *solverState +} + +// An analysis instance holds the state of a single pointer analysis problem. +type analysis struct { + config *Config // the client's control/observer interface + prog *ssa.Program // the program being analyzed + log io.Writer // log stream; nil to disable + panicNode nodeid // sink for panic, source for recover + nodes []*node // indexed by nodeid + flattenMemo map[types.Type][]*fieldInfo // memoization of flatten() + trackTypes map[types.Type]bool // memoization of shouldTrack() + constraints []constraint // set of constraints + cgnodes []*cgnode // all cgnodes + genq []*cgnode // queue of functions to generate constraints for + intrinsics map[*ssa.Function]intrinsic // non-nil values are summaries for intrinsic fns + globalval map[ssa.Value]nodeid // node for each global ssa.Value + globalobj map[ssa.Value]nodeid // maps v to sole member of pts(v), if singleton + localval map[ssa.Value]nodeid // node for each local ssa.Value + localobj map[ssa.Value]nodeid // maps v to sole member of pts(v), if singleton + atFuncs map[*ssa.Function]bool // address-taken functions (for presolver) + mapValues []nodeid // values of makemap objects (indirect in HVN) + work nodeset // solver's worklist + result *Result // results of the analysis + track track // pointerlike types whose aliasing we track + deltaSpace []int // working space for iterating over PTS deltas + + // Reflection & intrinsics: + hasher typeutil.Hasher // cache of type hashes + reflectValueObj types.Object // type symbol for reflect.Value (if present) + reflectValueCall *ssa.Function // (reflect.Value).Call + reflectRtypeObj types.Object // *types.TypeName for reflect.rtype (if present) + reflectRtypePtr *types.Pointer // *reflect.rtype + reflectType *types.Named // reflect.Type + rtypes typeutil.Map // nodeid of canonical *rtype-tagged object for type T + reflectZeros typeutil.Map // nodeid of canonical T-tagged object for zero value + runtimeSetFinalizer *ssa.Function // runtime.SetFinalizer +} + +// enclosingObj returns the first node of the addressable memory +// object that encloses node id. Panic ensues if that node does not +// belong to any object. +func (a *analysis) enclosingObj(id nodeid) nodeid { + // Find previous node with obj != nil. + for i := id; i >= 0; i-- { + n := a.nodes[i] + if obj := n.obj; obj != nil { + if i+nodeid(obj.size) <= id { + break // out of bounds + } + return i + } + } + panic("node has no enclosing object") +} + +// labelFor returns the Label for node id. +// Panic ensues if that node is not addressable. +func (a *analysis) labelFor(id nodeid) *Label { + return &Label{ + obj: a.nodes[a.enclosingObj(id)].obj, + subelement: a.nodes[id].subelement, + } +} + +func (a *analysis) warnf(pos token.Pos, format string, args ...interface{}) { + msg := fmt.Sprintf(format, args...) + if a.log != nil { + fmt.Fprintf(a.log, "%s: warning: %s\n", a.prog.Fset.Position(pos), msg) + } + a.result.Warnings = append(a.result.Warnings, Warning{pos, msg}) +} + +// computeTrackBits sets a.track to the necessary 'track' bits for the pointer queries. +func (a *analysis) computeTrackBits() { + var queryTypes []types.Type + for v := range a.config.Queries { + queryTypes = append(queryTypes, v.Type()) + } + for v := range a.config.IndirectQueries { + queryTypes = append(queryTypes, mustDeref(v.Type())) + } + for _, t := range queryTypes { + switch t.Underlying().(type) { + case *types.Chan: + a.track |= trackChan + case *types.Map: + a.track |= trackMap + case *types.Pointer: + a.track |= trackPtr + case *types.Slice: + a.track |= trackSlice + case *types.Interface: + a.track = trackAll + return + } + if rVObj := a.reflectValueObj; rVObj != nil && types.Identical(t, rVObj.Type()) { + a.track = trackAll + return + } + } +} + +// Analyze runs the pointer analysis with the scope and options +// specified by config, and returns the (synthetic) root of the callgraph. +// +// Pointer analysis of a transitively closed well-typed program should +// always succeed. An error can occur only due to an internal bug. +// +func Analyze(config *Config) (result *Result, err error) { + if config.Mains == nil { + return nil, fmt.Errorf("no main/test packages to analyze (check $GOROOT/$GOPATH)") + } + defer func() { + if p := recover(); p != nil { + err = fmt.Errorf("internal error in pointer analysis: %v (please report this bug)", p) + fmt.Fprintln(os.Stderr, "Internal panic in pointer analysis:") + debug.PrintStack() + } + }() + + a := &analysis{ + config: config, + log: config.Log, + prog: config.prog(), + globalval: make(map[ssa.Value]nodeid), + globalobj: make(map[ssa.Value]nodeid), + flattenMemo: make(map[types.Type][]*fieldInfo), + trackTypes: make(map[types.Type]bool), + atFuncs: make(map[*ssa.Function]bool), + hasher: typeutil.MakeHasher(), + intrinsics: make(map[*ssa.Function]intrinsic), + result: &Result{ + Queries: make(map[ssa.Value]Pointer), + IndirectQueries: make(map[ssa.Value]Pointer), + }, + deltaSpace: make([]int, 0, 100), + } + + if false { + a.log = os.Stderr // for debugging crashes; extremely verbose + } + + if a.log != nil { + fmt.Fprintln(a.log, "==== Starting analysis") + } + + // Pointer analysis requires a complete program for soundness. + // Check to prevent accidental misconfiguration. + for _, pkg := range a.prog.AllPackages() { + // (This only checks that the package scope is complete, + // not that func bodies exist, but it's a good signal.) + if !pkg.Object.Complete() { + return nil, fmt.Errorf(`pointer analysis requires a complete program yet package %q was incomplete`, pkg.Object.Path()) + } + } + + if reflect := a.prog.ImportedPackage("reflect"); reflect != nil { + rV := reflect.Object.Scope().Lookup("Value") + a.reflectValueObj = rV + a.reflectValueCall = a.prog.LookupMethod(rV.Type(), nil, "Call") + a.reflectType = reflect.Object.Scope().Lookup("Type").Type().(*types.Named) + a.reflectRtypeObj = reflect.Object.Scope().Lookup("rtype") + a.reflectRtypePtr = types.NewPointer(a.reflectRtypeObj.Type()) + + // Override flattening of reflect.Value, treating it like a basic type. + tReflectValue := a.reflectValueObj.Type() + a.flattenMemo[tReflectValue] = []*fieldInfo{{typ: tReflectValue}} + + // Override shouldTrack of reflect.Value and *reflect.rtype. + // Always track pointers of these types. + a.trackTypes[tReflectValue] = true + a.trackTypes[a.reflectRtypePtr] = true + + a.rtypes.SetHasher(a.hasher) + a.reflectZeros.SetHasher(a.hasher) + } + if runtime := a.prog.ImportedPackage("runtime"); runtime != nil { + a.runtimeSetFinalizer = runtime.Func("SetFinalizer") + } + a.computeTrackBits() + + a.generate() + a.showCounts() + + if optRenumber { + a.renumber() + } + + N := len(a.nodes) // excludes solver-created nodes + + if optHVN { + if debugHVNCrossCheck { + // Cross-check: run the solver once without + // optimization, once with, and compare the + // solutions. + savedConstraints := a.constraints + + a.solve() + a.dumpSolution("A.pts", N) + + // Restore. + a.constraints = savedConstraints + for _, n := range a.nodes { + n.solve = new(solverState) + } + a.nodes = a.nodes[:N] + + // rtypes is effectively part of the solver state. + a.rtypes = typeutil.Map{} + a.rtypes.SetHasher(a.hasher) + } + + a.hvn() + } + + if debugHVNCrossCheck { + runtime.GC() + runtime.GC() + } + + a.solve() + + // Compare solutions. + if optHVN && debugHVNCrossCheck { + a.dumpSolution("B.pts", N) + + if !diff("A.pts", "B.pts") { + return nil, fmt.Errorf("internal error: optimization changed solution") + } + } + + // Create callgraph.Nodes in deterministic order. + if cg := a.result.CallGraph; cg != nil { + for _, caller := range a.cgnodes { + cg.CreateNode(caller.fn) + } + } + + // Add dynamic edges to call graph. + var space [100]int + for _, caller := range a.cgnodes { + for _, site := range caller.sites { + for _, callee := range a.nodes[site.targets].solve.pts.AppendTo(space[:0]) { + a.callEdge(caller, site, nodeid(callee)) + } + } + } + + return a.result, nil +} + +// callEdge is called for each edge in the callgraph. +// calleeid is the callee's object node (has otFunction flag). +// +func (a *analysis) callEdge(caller *cgnode, site *callsite, calleeid nodeid) { + obj := a.nodes[calleeid].obj + if obj.flags&otFunction == 0 { + panic(fmt.Sprintf("callEdge %s -> n%d: not a function object", site, calleeid)) + } + callee := obj.cgn + + if cg := a.result.CallGraph; cg != nil { + // TODO(adonovan): opt: I would expect duplicate edges + // (to wrappers) to arise due to the elimination of + // context information, but I haven't observed any. + // Understand this better. + callgraph.AddEdge(cg.CreateNode(caller.fn), site.instr, cg.CreateNode(callee.fn)) + } + + if a.log != nil { + fmt.Fprintf(a.log, "\tcall edge %s -> %s\n", site, callee) + } + + // Warn about calls to non-intrinsic external functions. + // TODO(adonovan): de-dup these messages. + if fn := callee.fn; fn.Blocks == nil && a.findIntrinsic(fn) == nil { + a.warnf(site.pos(), "unsound call to unknown intrinsic: %s", fn) + a.warnf(fn.Pos(), " (declared here)") + } +} + +// dumpSolution writes the PTS solution to the specified file. +// +// It only dumps the nodes that existed before solving. The order in +// which solver-created nodes are created depends on pre-solver +// optimization, so we can't include them in the cross-check. +// +func (a *analysis) dumpSolution(filename string, N int) { + f, err := os.Create(filename) + if err != nil { + panic(err) + } + for id, n := range a.nodes[:N] { + if _, err := fmt.Fprintf(f, "pts(n%d) = {", id); err != nil { + panic(err) + } + var sep string + for _, l := range n.solve.pts.AppendTo(a.deltaSpace) { + if l >= N { + break + } + fmt.Fprintf(f, "%s%d", sep, l) + sep = " " + } + fmt.Fprintf(f, "} : %s\n", n.typ) + } + if err := f.Close(); err != nil { + panic(err) + } +} + +// showCounts logs the size of the constraint system. A typical +// optimized distribution is 65% copy, 13% load, 11% addr, 5% +// offsetAddr, 4% store, 2% others. +// +func (a *analysis) showCounts() { + if a.log != nil { + counts := make(map[reflect.Type]int) + for _, c := range a.constraints { + counts[reflect.TypeOf(c)]++ + } + fmt.Fprintf(a.log, "# constraints:\t%d\n", len(a.constraints)) + var lines []string + for t, n := range counts { + line := fmt.Sprintf("%7d (%2d%%)\t%s", n, 100*n/len(a.constraints), t) + lines = append(lines, line) + } + sort.Sort(sort.Reverse(sort.StringSlice(lines))) + for _, line := range lines { + fmt.Fprintf(a.log, "\t%s\n", line) + } + + fmt.Fprintf(a.log, "# nodes:\t%d\n", len(a.nodes)) + + // Show number of pointer equivalence classes. + m := make(map[*solverState]bool) + for _, n := range a.nodes { + m[n.solve] = true + } + fmt.Fprintf(a.log, "# ptsets:\t%d\n", len(m)) + } +} diff --git a/vendor/golang.org/x/tools/go/pointer/api.go b/vendor/golang.org/x/tools/go/pointer/api.go new file mode 100644 index 0000000..8f9ae0a --- /dev/null +++ b/vendor/golang.org/x/tools/go/pointer/api.go @@ -0,0 +1,245 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package pointer + +import ( + "bytes" + "fmt" + "go/token" + "io" + + "golang.org/x/tools/container/intsets" + "golang.org/x/tools/go/callgraph" + "golang.org/x/tools/go/ssa" + "golang.org/x/tools/go/types/typeutil" +) + +// A Config formulates a pointer analysis problem for Analyze(). +type Config struct { + // Mains contains the set of 'main' packages to analyze + // Clients must provide the analysis with at least one + // package defining a main() function. + // + // Non-main packages in the ssa.Program that are not + // dependencies of any main package may still affect the + // analysis result, because they contribute runtime types and + // thus methods. + // TODO(adonovan): investigate whether this is desirable. + Mains []*ssa.Package + + // Reflection determines whether to handle reflection + // operators soundly, which is currently rather slow since it + // causes constraint to be generated during solving + // proportional to the number of constraint variables, which + // has not yet been reduced by presolver optimisation. + Reflection bool + + // BuildCallGraph determines whether to construct a callgraph. + // If enabled, the graph will be available in Result.CallGraph. + BuildCallGraph bool + + // The client populates Queries[v] or IndirectQueries[v] + // for each ssa.Value v of interest, to request that the + // points-to sets pts(v) or pts(*v) be computed. If the + // client needs both points-to sets, v may appear in both + // maps. + // + // (IndirectQueries is typically used for Values corresponding + // to source-level lvalues, e.g. an *ssa.Global.) + // + // The analysis populates the corresponding + // Result.{Indirect,}Queries map when it creates the pointer + // variable for v or *v. Upon completion the client can + // inspect that map for the results. + // + // TODO(adonovan): this API doesn't scale well for batch tools + // that want to dump the entire solution. Perhaps optionally + // populate a map[*ssa.DebugRef]Pointer in the Result, one + // entry per source expression. + // + Queries map[ssa.Value]struct{} + IndirectQueries map[ssa.Value]struct{} + + // If Log is non-nil, log messages are written to it. + // Logging is extremely verbose. + Log io.Writer +} + +type track uint32 + +const ( + trackChan track = 1 << iota // track 'chan' references + trackMap // track 'map' references + trackPtr // track regular pointers + trackSlice // track slice references + + trackAll = ^track(0) +) + +// AddQuery adds v to Config.Queries. +// Precondition: CanPoint(v.Type()). +// TODO(adonovan): consider returning a new Pointer for this query, +// which will be initialized during analysis. That avoids the needs +// for the corresponding ssa.Value-keyed maps in Config and Result. +func (c *Config) AddQuery(v ssa.Value) { + if !CanPoint(v.Type()) { + panic(fmt.Sprintf("%s is not a pointer-like value: %s", v, v.Type())) + } + if c.Queries == nil { + c.Queries = make(map[ssa.Value]struct{}) + } + c.Queries[v] = struct{}{} +} + +// AddQuery adds v to Config.IndirectQueries. +// Precondition: CanPoint(v.Type().Underlying().(*types.Pointer).Elem()). +func (c *Config) AddIndirectQuery(v ssa.Value) { + if c.IndirectQueries == nil { + c.IndirectQueries = make(map[ssa.Value]struct{}) + } + if !CanPoint(mustDeref(v.Type())) { + panic(fmt.Sprintf("%s is not the address of a pointer-like value: %s", v, v.Type())) + } + c.IndirectQueries[v] = struct{}{} +} + +func (c *Config) prog() *ssa.Program { + for _, main := range c.Mains { + return main.Prog + } + panic("empty scope") +} + +type Warning struct { + Pos token.Pos + Message string +} + +// A Result contains the results of a pointer analysis. +// +// See Config for how to request the various Result components. +// +type Result struct { + CallGraph *callgraph.Graph // discovered call graph + Queries map[ssa.Value]Pointer // pts(v) for each v in Config.Queries. + IndirectQueries map[ssa.Value]Pointer // pts(*v) for each v in Config.IndirectQueries. + Warnings []Warning // warnings of unsoundness +} + +// A Pointer is an equivalence class of pointer-like values. +// +// A Pointer doesn't have a unique type because pointers of distinct +// types may alias the same object. +// +type Pointer struct { + a *analysis + n nodeid +} + +// A PointsToSet is a set of labels (locations or allocations). +type PointsToSet struct { + a *analysis // may be nil if pts is nil + pts *nodeset +} + +func (s PointsToSet) String() string { + var buf bytes.Buffer + buf.WriteByte('[') + if s.pts != nil { + var space [50]int + for i, l := range s.pts.AppendTo(space[:0]) { + if i > 0 { + buf.WriteString(", ") + } + buf.WriteString(s.a.labelFor(nodeid(l)).String()) + } + } + buf.WriteByte(']') + return buf.String() +} + +// PointsTo returns the set of labels that this points-to set +// contains. +func (s PointsToSet) Labels() []*Label { + var labels []*Label + if s.pts != nil { + var space [50]int + for _, l := range s.pts.AppendTo(space[:0]) { + labels = append(labels, s.a.labelFor(nodeid(l))) + } + } + return labels +} + +// If this PointsToSet came from a Pointer of interface kind +// or a reflect.Value, DynamicTypes returns the set of dynamic +// types that it may contain. (For an interface, they will +// always be concrete types.) +// +// The result is a mapping whose keys are the dynamic types to which +// it may point. For each pointer-like key type, the corresponding +// map value is the PointsToSet for pointers of that type. +// +// The result is empty unless CanHaveDynamicTypes(T). +// +func (s PointsToSet) DynamicTypes() *typeutil.Map { + var tmap typeutil.Map + tmap.SetHasher(s.a.hasher) + if s.pts != nil { + var space [50]int + for _, x := range s.pts.AppendTo(space[:0]) { + ifaceObjId := nodeid(x) + if !s.a.isTaggedObject(ifaceObjId) { + continue // !CanHaveDynamicTypes(tDyn) + } + tDyn, v, indirect := s.a.taggedValue(ifaceObjId) + if indirect { + panic("indirect tagged object") // implement later + } + pts, ok := tmap.At(tDyn).(PointsToSet) + if !ok { + pts = PointsToSet{s.a, new(nodeset)} + tmap.Set(tDyn, pts) + } + pts.pts.addAll(&s.a.nodes[v].solve.pts) + } + } + return &tmap +} + +// Intersects reports whether this points-to set and the +// argument points-to set contain common members. +func (x PointsToSet) Intersects(y PointsToSet) bool { + if x.pts == nil || y.pts == nil { + return false + } + // This takes Θ(|x|+|y|) time. + var z intsets.Sparse + z.Intersection(&x.pts.Sparse, &y.pts.Sparse) + return !z.IsEmpty() +} + +func (p Pointer) String() string { + return fmt.Sprintf("n%d", p.n) +} + +// PointsTo returns the points-to set of this pointer. +func (p Pointer) PointsTo() PointsToSet { + if p.n == 0 { + return PointsToSet{} + } + return PointsToSet{p.a, &p.a.nodes[p.n].solve.pts} +} + +// MayAlias reports whether the receiver pointer may alias +// the argument pointer. +func (p Pointer) MayAlias(q Pointer) bool { + return p.PointsTo().Intersects(q.PointsTo()) +} + +// DynamicTypes returns p.PointsTo().DynamicTypes(). +func (p Pointer) DynamicTypes() *typeutil.Map { + return p.PointsTo().DynamicTypes() +} diff --git a/vendor/golang.org/x/tools/go/pointer/callgraph.go b/vendor/golang.org/x/tools/go/pointer/callgraph.go new file mode 100644 index 0000000..48e152e --- /dev/null +++ b/vendor/golang.org/x/tools/go/pointer/callgraph.go @@ -0,0 +1,61 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package pointer + +// This file defines the internal (context-sensitive) call graph. + +import ( + "fmt" + "go/token" + + "golang.org/x/tools/go/ssa" +) + +type cgnode struct { + fn *ssa.Function + obj nodeid // start of this contour's object block + sites []*callsite // ordered list of callsites within this function + callersite *callsite // where called from, if known; nil for shared contours +} + +// contour returns a description of this node's contour. +func (n *cgnode) contour() string { + if n.callersite == nil { + return "shared contour" + } + if n.callersite.instr != nil { + return fmt.Sprintf("as called from %s", n.callersite.instr.Parent()) + } + return fmt.Sprintf("as called from intrinsic (targets=n%d)", n.callersite.targets) +} + +func (n *cgnode) String() string { + return fmt.Sprintf("cg%d:%s", n.obj, n.fn) +} + +// A callsite represents a single call site within a cgnode; +// it is implicitly context-sensitive. +// callsites never represent calls to built-ins; +// they are handled as intrinsics. +// +type callsite struct { + targets nodeid // pts(·) contains objects for dynamically called functions + instr ssa.CallInstruction // the call instruction; nil for synthetic/intrinsic +} + +func (c *callsite) String() string { + if c.instr != nil { + return c.instr.Common().Description() + } + return "synthetic function call" +} + +// pos returns the source position of this callsite, or token.NoPos if implicit. +func (c *callsite) pos() token.Pos { + if c.instr != nil { + return c.instr.Pos() + } + return token.NoPos +} diff --git a/vendor/golang.org/x/tools/go/pointer/constraint.go b/vendor/golang.org/x/tools/go/pointer/constraint.go new file mode 100644 index 0000000..e6371cc --- /dev/null +++ b/vendor/golang.org/x/tools/go/pointer/constraint.go @@ -0,0 +1,151 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package pointer + +import ( + "golang.org/x/tools/go/types" +) + +type constraint interface { + // For a complex constraint, returns the nodeid of the pointer + // to which it is attached. For addr and copy, returns dst. + ptr() nodeid + + // renumber replaces each nodeid n in the constraint by mapping[n]. + renumber(mapping []nodeid) + + // presolve is a hook for constraint-specific behaviour during + // pre-solver optimization. Typical implementations mark as + // indirect the set of nodes to which the solver will add copy + // edges or PTS labels. + presolve(h *hvn) + + // solve is called for complex constraints when the pts for + // the node to which they are attached has changed. + solve(a *analysis, delta *nodeset) + + String() string +} + +// dst = &src +// pts(dst) ⊇ {src} +// A base constraint used to initialize the solver's pt sets +type addrConstraint struct { + dst nodeid // (ptr) + src nodeid +} + +func (c *addrConstraint) ptr() nodeid { return c.dst } +func (c *addrConstraint) renumber(mapping []nodeid) { + c.dst = mapping[c.dst] + c.src = mapping[c.src] +} + +// dst = src +// A simple constraint represented directly as a copyTo graph edge. +type copyConstraint struct { + dst nodeid // (ptr) + src nodeid +} + +func (c *copyConstraint) ptr() nodeid { return c.dst } +func (c *copyConstraint) renumber(mapping []nodeid) { + c.dst = mapping[c.dst] + c.src = mapping[c.src] +} + +// dst = src[offset] +// A complex constraint attached to src (the pointer) +type loadConstraint struct { + offset uint32 + dst nodeid + src nodeid // (ptr) +} + +func (c *loadConstraint) ptr() nodeid { return c.src } +func (c *loadConstraint) renumber(mapping []nodeid) { + c.dst = mapping[c.dst] + c.src = mapping[c.src] +} + +// dst[offset] = src +// A complex constraint attached to dst (the pointer) +type storeConstraint struct { + offset uint32 + dst nodeid // (ptr) + src nodeid +} + +func (c *storeConstraint) ptr() nodeid { return c.dst } +func (c *storeConstraint) renumber(mapping []nodeid) { + c.dst = mapping[c.dst] + c.src = mapping[c.src] +} + +// dst = &src.f or dst = &src[0] +// A complex constraint attached to dst (the pointer) +type offsetAddrConstraint struct { + offset uint32 + dst nodeid + src nodeid // (ptr) +} + +func (c *offsetAddrConstraint) ptr() nodeid { return c.src } +func (c *offsetAddrConstraint) renumber(mapping []nodeid) { + c.dst = mapping[c.dst] + c.src = mapping[c.src] +} + +// dst = src.(typ) where typ is an interface +// A complex constraint attached to src (the interface). +// No representation change: pts(dst) and pts(src) contains tagged objects. +type typeFilterConstraint struct { + typ types.Type // an interface type + dst nodeid + src nodeid // (ptr) +} + +func (c *typeFilterConstraint) ptr() nodeid { return c.src } +func (c *typeFilterConstraint) renumber(mapping []nodeid) { + c.dst = mapping[c.dst] + c.src = mapping[c.src] +} + +// dst = src.(typ) where typ is a concrete type +// A complex constraint attached to src (the interface). +// +// If exact, only tagged objects identical to typ are untagged. +// If !exact, tagged objects assignable to typ are untagged too. +// The latter is needed for various reflect operators, e.g. Send. +// +// This entails a representation change: +// pts(src) contains tagged objects, +// pts(dst) contains their payloads. +type untagConstraint struct { + typ types.Type // a concrete type + dst nodeid + src nodeid // (ptr) + exact bool +} + +func (c *untagConstraint) ptr() nodeid { return c.src } +func (c *untagConstraint) renumber(mapping []nodeid) { + c.dst = mapping[c.dst] + c.src = mapping[c.src] +} + +// src.method(params...) +// A complex constraint attached to iface. +type invokeConstraint struct { + method *types.Func // the abstract method + iface nodeid // (ptr) the interface + params nodeid // the start of the identity/params/results block +} + +func (c *invokeConstraint) ptr() nodeid { return c.iface } +func (c *invokeConstraint) renumber(mapping []nodeid) { + c.iface = mapping[c.iface] + c.params = mapping[c.params] +} diff --git a/vendor/golang.org/x/tools/go/pointer/doc.go b/vendor/golang.org/x/tools/go/pointer/doc.go new file mode 100644 index 0000000..22e569c --- /dev/null +++ b/vendor/golang.org/x/tools/go/pointer/doc.go @@ -0,0 +1,610 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +/* + +Package pointer implements Andersen's analysis, an inclusion-based +pointer analysis algorithm first described in (Andersen, 1994). + +A pointer analysis relates every pointer expression in a whole program +to the set of memory locations to which it might point. This +information can be used to construct a call graph of the program that +precisely represents the destinations of dynamic function and method +calls. It can also be used to determine, for example, which pairs of +channel operations operate on the same channel. + +The package allows the client to request a set of expressions of +interest for which the points-to information will be returned once the +analysis is complete. In addition, the client may request that a +callgraph is constructed. The example program in example_test.go +demonstrates both of these features. Clients should not request more +information than they need since it may increase the cost of the +analysis significantly. + + +CLASSIFICATION + +Our algorithm is INCLUSION-BASED: the points-to sets for x and y will +be related by pts(y) ⊇ pts(x) if the program contains the statement +y = x. + +It is FLOW-INSENSITIVE: it ignores all control flow constructs and the +order of statements in a program. It is therefore a "MAY ALIAS" +analysis: its facts are of the form "P may/may not point to L", +not "P must point to L". + +It is FIELD-SENSITIVE: it builds separate points-to sets for distinct +fields, such as x and y in struct { x, y *int }. + +It is mostly CONTEXT-INSENSITIVE: most functions are analyzed once, +so values can flow in at one call to the function and return out at +another. Only some smaller functions are analyzed with consideration +of their calling context. + +It has a CONTEXT-SENSITIVE HEAP: objects are named by both allocation +site and context, so the objects returned by two distinct calls to f: + func f() *T { return new(T) } +are distinguished up to the limits of the calling context. + +It is a WHOLE PROGRAM analysis: it requires SSA-form IR for the +complete Go program and summaries for native code. + +See the (Hind, PASTE'01) survey paper for an explanation of these terms. + + +SOUNDNESS + +The analysis is fully sound when invoked on pure Go programs that do not +use reflection or unsafe.Pointer conversions. In other words, if there +is any possible execution of the program in which pointer P may point to +object O, the analysis will report that fact. + + +REFLECTION + +By default, the "reflect" library is ignored by the analysis, as if all +its functions were no-ops, but if the client enables the Reflection flag, +the analysis will make a reasonable attempt to model the effects of +calls into this library. However, this comes at a significant +performance cost, and not all features of that library are yet +implemented. In addition, some simplifying approximations must be made +to ensure that the analysis terminates; for example, reflection can be +used to construct an infinite set of types and values of those types, +but the analysis arbitrarily bounds the depth of such types. + +Most but not all reflection operations are supported. +In particular, addressable reflect.Values are not yet implemented, so +operations such as (reflect.Value).Set have no analytic effect. + + +UNSAFE POINTER CONVERSIONS + +The pointer analysis makes no attempt to understand aliasing between the +operand x and result y of an unsafe.Pointer conversion: + y = (*T)(unsafe.Pointer(x)) +It is as if the conversion allocated an entirely new object: + y = new(T) + + +NATIVE CODE + +The analysis cannot model the aliasing effects of functions written in +languages other than Go, such as runtime intrinsics in C or assembly, or +code accessed via cgo. The result is as if such functions are no-ops. +However, various important intrinsics are understood by the analysis, +along with built-ins such as append. + +The analysis currently provides no way for users to specify the aliasing +effects of native code. + +------------------------------------------------------------------------ + +IMPLEMENTATION + +The remaining documentation is intended for package maintainers and +pointer analysis specialists. Maintainers should have a solid +understanding of the referenced papers (especially those by H&L and PKH) +before making making significant changes. + +The implementation is similar to that described in (Pearce et al, +PASTE'04). Unlike many algorithms which interleave constraint +generation and solving, constructing the callgraph as they go, this +implementation for the most part observes a phase ordering (generation +before solving), with only simple (copy) constraints being generated +during solving. (The exception is reflection, which creates various +constraints during solving as new types flow to reflect.Value +operations.) This improves the traction of presolver optimisations, +but imposes certain restrictions, e.g. potential context sensitivity +is limited since all variants must be created a priori. + + +TERMINOLOGY + +A type is said to be "pointer-like" if it is a reference to an object. +Pointer-like types include pointers and also interfaces, maps, channels, +functions and slices. + +We occasionally use C's x->f notation to distinguish the case where x +is a struct pointer from x.f where is a struct value. + +Pointer analysis literature (and our comments) often uses the notation +dst=*src+offset to mean something different than what it means in Go. +It means: for each node index p in pts(src), the node index p+offset is +in pts(dst). Similarly *dst+offset=src is used for store constraints +and dst=src+offset for offset-address constraints. + + +NODES + +Nodes are the key datastructure of the analysis, and have a dual role: +they represent both constraint variables (equivalence classes of +pointers) and members of points-to sets (things that can be pointed +at, i.e. "labels"). + +Nodes are naturally numbered. The numbering enables compact +representations of sets of nodes such as bitvectors (or BDDs); and the +ordering enables a very cheap way to group related nodes together. For +example, passing n parameters consists of generating n parallel +constraints from caller+i to callee+i for 0<=i y is added. + + ChangeInterface is a simple copy because the representation of + tagged objects is independent of the interface type (in contrast + to the "method tables" approach used by the gc runtime). + + y := Invoke x.m(...) is implemented by allocating contiguous P/R + blocks for the callsite and adding a dynamic rule triggered by each + tagged object added to pts(x). The rule adds param/results copy + edges to/from each discovered concrete method. + + (Q. Why do we model an interface as a pointer to a pair of type and + value, rather than as a pair of a pointer to type and a pointer to + value? + A. Control-flow joins would merge interfaces ({T1}, {V1}) and ({T2}, + {V2}) to make ({T1,T2}, {V1,V2}), leading to the infeasible and + type-unsafe combination (T1,V2). Treating the value and its concrete + type as inseparable makes the analysis type-safe.) + +reflect.Value + A reflect.Value is modelled very similar to an interface{}, i.e. as + a pointer exclusively to tagged objects, but with two generalizations. + + 1) a reflect.Value that represents an lvalue points to an indirect + (obj.flags ⊇ {otIndirect}) tagged object, which has a similar + layout to an tagged object except that the value is a pointer to + the dynamic type. Indirect tagged objects preserve the correct + aliasing so that mutations made by (reflect.Value).Set can be + observed. + + Indirect objects only arise when an lvalue is derived from an + rvalue by indirection, e.g. the following code: + + type S struct { X T } + var s S + var i interface{} = &s // i points to a *S-tagged object (from MakeInterface) + v1 := reflect.ValueOf(i) // v1 points to same *S-tagged object as i + v2 := v1.Elem() // v2 points to an indirect S-tagged object, pointing to s + v3 := v2.FieldByName("X") // v3 points to an indirect int-tagged object, pointing to s.X + v3.Set(y) // pts(s.X) ⊇ pts(y) + + Whether indirect or not, the concrete type of the tagged object + corresponds to the user-visible dynamic type, and the existence + of a pointer is an implementation detail. + + (NB: indirect tagged objects are not yet implemented) + + 2) The dynamic type tag of a tagged object pointed to by a + reflect.Value may be an interface type; it need not be concrete. + + This arises in code such as this: + tEface := reflect.TypeOf(new(interface{}).Elem() // interface{} + eface := reflect.Zero(tEface) + pts(eface) is a singleton containing an interface{}-tagged + object. That tagged object's payload is an interface{} value, + i.e. the pts of the payload contains only concrete-tagged + objects, although in this example it's the zero interface{} value, + so its pts is empty. + +reflect.Type + Just as in the real "reflect" library, we represent a reflect.Type + as an interface whose sole implementation is the concrete type, + *reflect.rtype. (This choice is forced on us by go/types: clients + cannot fabricate types with arbitrary method sets.) + + rtype instances are canonical: there is at most one per dynamic + type. (rtypes are in fact large structs but since identity is all + that matters, we represent them by a single node.) + + The payload of each *rtype-tagged object is an *rtype pointer that + points to exactly one such canonical rtype object. We exploit this + by setting the node.typ of the payload to the dynamic type, not + '*rtype'. This saves us an indirection in each resolution rule. As + an optimisation, *rtype-tagged objects are canonicalized too. + + +Aggregate types: + +Aggregate types are treated as if all directly contained +aggregates are recursively flattened out. + +Structs + *ssa.Field y = x.f creates a simple edge to y from x's node at f's offset. + + *ssa.FieldAddr y = &x->f requires a dynamic closure rule to create + simple edges for each struct discovered in pts(x). + + The nodes of a struct consist of a special 'identity' node (whose + type is that of the struct itself), followed by the nodes for all + the struct's fields, recursively flattened out. A pointer to the + struct is a pointer to its identity node. That node allows us to + distinguish a pointer to a struct from a pointer to its first field. + + Field offsets are logical field offsets (plus one for the identity + node), so the sizes of the fields can be ignored by the analysis. + + (The identity node is non-traditional but enables the distiction + described above, which is valuable for code comprehension tools. + Typical pointer analyses for C, whose purpose is compiler + optimization, must soundly model unsafe.Pointer (void*) conversions, + and this requires fidelity to the actual memory layout using physical + field offsets.) + + *ssa.Field y = x.f creates a simple edge to y from x's node at f's offset. + + *ssa.FieldAddr y = &x->f requires a dynamic closure rule to create + simple edges for each struct discovered in pts(x). + +Arrays + We model an array by an identity node (whose type is that of the + array itself) followed by a node representing all the elements of + the array; the analysis does not distinguish elements with different + indices. Effectively, an array is treated like struct{elem T}, a + load y=x[i] like y=x.elem, and a store x[i]=y like x.elem=y; the + index i is ignored. + + A pointer to an array is pointer to its identity node. (A slice is + also a pointer to an array's identity node.) The identity node + allows us to distinguish a pointer to an array from a pointer to one + of its elements, but it is rather costly because it introduces more + offset constraints into the system. Furthermore, sound treatment of + unsafe.Pointer would require us to dispense with this node. + + Arrays may be allocated by Alloc, by make([]T), by calls to append, + and via reflection. + +Tuples (T, ...) + Tuples are treated like structs with naturally numbered fields. + *ssa.Extract is analogous to *ssa.Field. + + However, tuples have no identity field since by construction, they + cannot be address-taken. + + +FUNCTION CALLS + + There are three kinds of function call: + (1) static "call"-mode calls of functions. + (2) dynamic "call"-mode calls of functions. + (3) dynamic "invoke"-mode calls of interface methods. + Cases 1 and 2 apply equally to methods and standalone functions. + + Static calls. + A static call consists three steps: + - finding the function object of the callee; + - creating copy edges from the actual parameter value nodes to the + P-block in the function object (this includes the receiver if + the callee is a method); + - creating copy edges from the R-block in the function object to + the value nodes for the result of the call. + + A static function call is little more than two struct value copies + between the P/R blocks of caller and callee: + + callee.P = caller.P + caller.R = callee.R + + Context sensitivity + + Static calls (alone) may be treated context sensitively, + i.e. each callsite may cause a distinct re-analysis of the + callee, improving precision. Our current context-sensitivity + policy treats all intrinsics and getter/setter methods in this + manner since such functions are small and seem like an obvious + source of spurious confluences, though this has not yet been + evaluated. + + Dynamic function calls + + Dynamic calls work in a similar manner except that the creation of + copy edges occurs dynamically, in a similar fashion to a pair of + struct copies in which the callee is indirect: + + callee->P = caller.P + caller.R = callee->R + + (Recall that the function object's P- and R-blocks are contiguous.) + + Interface method invocation + + For invoke-mode calls, we create a params/results block for the + callsite and attach a dynamic closure rule to the interface. For + each new tagged object that flows to the interface, we look up + the concrete method, find its function object, and connect its P/R + blocks to the callsite's P/R blocks, adding copy edges to the graph + during solving. + + Recording call targets + + The analysis notifies its clients of each callsite it encounters, + passing a CallSite interface. Among other things, the CallSite + contains a synthetic constraint variable ("targets") whose + points-to solution includes the set of all function objects to + which the call may dispatch. + + It is via this mechanism that the callgraph is made available. + Clients may also elect to be notified of callgraph edges directly; + internally this just iterates all "targets" variables' pts(·)s. + + +PRESOLVER + +We implement Hash-Value Numbering (HVN), a pre-solver constraint +optimization described in Hardekopf & Lin, SAS'07. This is documented +in more detail in hvn.go. We intend to add its cousins HR and HU in +future. + + +SOLVER + +The solver is currently a naive Andersen-style implementation; it does +not perform online cycle detection, though we plan to add solver +optimisations such as Hybrid- and Lazy- Cycle Detection from (Hardekopf +& Lin, PLDI'07). + +It uses difference propagation (Pearce et al, SQC'04) to avoid +redundant re-triggering of closure rules for values already seen. + +Points-to sets are represented using sparse bit vectors (similar to +those used in LLVM and gcc), which are more space- and time-efficient +than sets based on Go's built-in map type or dense bit vectors. + +Nodes are permuted prior to solving so that object nodes (which may +appear in points-to sets) are lower numbered than non-object (var) +nodes. This improves the density of the set over which the PTSs +range, and thus the efficiency of the representation. + +Partly thanks to avoiding map iteration, the execution of the solver is +100% deterministic, a great help during debugging. + + +FURTHER READING + +Andersen, L. O. 1994. Program analysis and specialization for the C +programming language. Ph.D. dissertation. DIKU, University of +Copenhagen. + +David J. Pearce, Paul H. J. Kelly, and Chris Hankin. 2004. Efficient +field-sensitive pointer analysis for C. In Proceedings of the 5th ACM +SIGPLAN-SIGSOFT workshop on Program analysis for software tools and +engineering (PASTE '04). ACM, New York, NY, USA, 37-42. +http://doi.acm.org/10.1145/996821.996835 + +David J. Pearce, Paul H. J. Kelly, and Chris Hankin. 2004. Online +Cycle Detection and Difference Propagation: Applications to Pointer +Analysis. Software Quality Control 12, 4 (December 2004), 311-337. +http://dx.doi.org/10.1023/B:SQJO.0000039791.93071.a2 + +David Grove and Craig Chambers. 2001. A framework for call graph +construction algorithms. ACM Trans. Program. Lang. Syst. 23, 6 +(November 2001), 685-746. +http://doi.acm.org/10.1145/506315.506316 + +Ben Hardekopf and Calvin Lin. 2007. The ant and the grasshopper: fast +and accurate pointer analysis for millions of lines of code. In +Proceedings of the 2007 ACM SIGPLAN conference on Programming language +design and implementation (PLDI '07). ACM, New York, NY, USA, 290-299. +http://doi.acm.org/10.1145/1250734.1250767 + +Ben Hardekopf and Calvin Lin. 2007. Exploiting pointer and location +equivalence to optimize pointer analysis. In Proceedings of the 14th +international conference on Static Analysis (SAS'07), Hanne Riis +Nielson and Gilberto Filé (Eds.). Springer-Verlag, Berlin, Heidelberg, +265-280. + +Atanas Rountev and Satish Chandra. 2000. Off-line variable substitution +for scaling points-to analysis. In Proceedings of the ACM SIGPLAN 2000 +conference on Programming language design and implementation (PLDI '00). +ACM, New York, NY, USA, 47-56. DOI=10.1145/349299.349310 +http://doi.acm.org/10.1145/349299.349310 + +*/ +package pointer // import "golang.org/x/tools/go/pointer" diff --git a/vendor/golang.org/x/tools/go/pointer/gen.go b/vendor/golang.org/x/tools/go/pointer/gen.go new file mode 100644 index 0000000..6c256ac --- /dev/null +++ b/vendor/golang.org/x/tools/go/pointer/gen.go @@ -0,0 +1,1292 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package pointer + +// This file defines the constraint generation phase. + +// TODO(adonovan): move the constraint definitions and the store() etc +// functions which add them (and are also used by the solver) into a +// new file, constraints.go. + +import ( + "fmt" + "go/token" + + "golang.org/x/tools/go/callgraph" + "golang.org/x/tools/go/ssa" + "golang.org/x/tools/go/types" +) + +var ( + tEface = types.NewInterface(nil, nil).Complete() + tInvalid = types.Typ[types.Invalid] + tUnsafePtr = types.Typ[types.UnsafePointer] +) + +// ---------- Node creation ---------- + +// nextNode returns the index of the next unused node. +func (a *analysis) nextNode() nodeid { + return nodeid(len(a.nodes)) +} + +// addNodes creates nodes for all scalar elements in type typ, and +// returns the id of the first one, or zero if the type was +// analytically uninteresting. +// +// comment explains the origin of the nodes, as a debugging aid. +// +func (a *analysis) addNodes(typ types.Type, comment string) nodeid { + id := a.nextNode() + for _, fi := range a.flatten(typ) { + a.addOneNode(fi.typ, comment, fi) + } + if id == a.nextNode() { + return 0 // type contained no pointers + } + return id +} + +// addOneNode creates a single node with type typ, and returns its id. +// +// typ should generally be scalar (except for tagged.T nodes +// and struct/array identity nodes). Use addNodes for non-scalar types. +// +// comment explains the origin of the nodes, as a debugging aid. +// subelement indicates the subelement, e.g. ".a.b[*].c". +// +func (a *analysis) addOneNode(typ types.Type, comment string, subelement *fieldInfo) nodeid { + id := a.nextNode() + a.nodes = append(a.nodes, &node{typ: typ, subelement: subelement, solve: new(solverState)}) + if a.log != nil { + fmt.Fprintf(a.log, "\tcreate n%d %s for %s%s\n", + id, typ, comment, subelement.path()) + } + return id +} + +// setValueNode associates node id with the value v. +// cgn identifies the context iff v is a local variable. +// +func (a *analysis) setValueNode(v ssa.Value, id nodeid, cgn *cgnode) { + if cgn != nil { + a.localval[v] = id + } else { + a.globalval[v] = id + } + if a.log != nil { + fmt.Fprintf(a.log, "\tval[%s] = n%d (%T)\n", v.Name(), id, v) + } + + // Due to context-sensitivity, we may encounter the same Value + // in many contexts. We merge them to a canonical node, since + // that's what all clients want. + + // Record the (v, id) relation if the client has queried pts(v). + if _, ok := a.config.Queries[v]; ok { + t := v.Type() + ptr, ok := a.result.Queries[v] + if !ok { + // First time? Create the canonical query node. + ptr = Pointer{a, a.addNodes(t, "query")} + a.result.Queries[v] = ptr + } + a.result.Queries[v] = ptr + a.copy(ptr.n, id, a.sizeof(t)) + } + + // Record the (*v, id) relation if the client has queried pts(*v). + if _, ok := a.config.IndirectQueries[v]; ok { + t := v.Type() + ptr, ok := a.result.IndirectQueries[v] + if !ok { + // First time? Create the canonical indirect query node. + ptr = Pointer{a, a.addNodes(v.Type(), "query.indirect")} + a.result.IndirectQueries[v] = ptr + } + a.genLoad(cgn, ptr.n, v, 0, a.sizeof(t)) + } +} + +// endObject marks the end of a sequence of calls to addNodes denoting +// a single object allocation. +// +// obj is the start node of the object, from a prior call to nextNode. +// Its size, flags and optional data will be updated. +// +func (a *analysis) endObject(obj nodeid, cgn *cgnode, data interface{}) *object { + // Ensure object is non-empty by padding; + // the pad will be the object node. + size := uint32(a.nextNode() - obj) + if size == 0 { + a.addOneNode(tInvalid, "padding", nil) + } + objNode := a.nodes[obj] + o := &object{ + size: size, // excludes padding + cgn: cgn, + data: data, + } + objNode.obj = o + + return o +} + +// makeFunctionObject creates and returns a new function object +// (contour) for fn, and returns the id of its first node. It also +// enqueues fn for subsequent constraint generation. +// +// For a context-sensitive contour, callersite identifies the sole +// callsite; for shared contours, caller is nil. +// +func (a *analysis) makeFunctionObject(fn *ssa.Function, callersite *callsite) nodeid { + if a.log != nil { + fmt.Fprintf(a.log, "\t---- makeFunctionObject %s\n", fn) + } + + // obj is the function object (identity, params, results). + obj := a.nextNode() + cgn := a.makeCGNode(fn, obj, callersite) + sig := fn.Signature + a.addOneNode(sig, "func.cgnode", nil) // (scalar with Signature type) + if recv := sig.Recv(); recv != nil { + a.addNodes(recv.Type(), "func.recv") + } + a.addNodes(sig.Params(), "func.params") + a.addNodes(sig.Results(), "func.results") + a.endObject(obj, cgn, fn).flags |= otFunction + + if a.log != nil { + fmt.Fprintf(a.log, "\t----\n") + } + + // Queue it up for constraint processing. + a.genq = append(a.genq, cgn) + + return obj +} + +// makeTagged creates a tagged object of type typ. +func (a *analysis) makeTagged(typ types.Type, cgn *cgnode, data interface{}) nodeid { + obj := a.addOneNode(typ, "tagged.T", nil) // NB: type may be non-scalar! + a.addNodes(typ, "tagged.v") + a.endObject(obj, cgn, data).flags |= otTagged + return obj +} + +// makeRtype returns the canonical tagged object of type *rtype whose +// payload points to the sole rtype object for T. +// +// TODO(adonovan): move to reflect.go; it's part of the solver really. +// +func (a *analysis) makeRtype(T types.Type) nodeid { + if v := a.rtypes.At(T); v != nil { + return v.(nodeid) + } + + // Create the object for the reflect.rtype itself, which is + // ordinarily a large struct but here a single node will do. + obj := a.nextNode() + a.addOneNode(T, "reflect.rtype", nil) + a.endObject(obj, nil, T) + + id := a.makeTagged(a.reflectRtypePtr, nil, T) + a.nodes[id+1].typ = T // trick (each *rtype tagged object is a singleton) + a.addressOf(a.reflectRtypePtr, id+1, obj) + + a.rtypes.Set(T, id) + return id +} + +// rtypeValue returns the type of the *reflect.rtype-tagged object obj. +func (a *analysis) rtypeTaggedValue(obj nodeid) types.Type { + tDyn, t, _ := a.taggedValue(obj) + if tDyn != a.reflectRtypePtr { + panic(fmt.Sprintf("not a *reflect.rtype-tagged object: obj=n%d tag=%v payload=n%d", obj, tDyn, t)) + } + return a.nodes[t].typ +} + +// valueNode returns the id of the value node for v, creating it (and +// the association) as needed. It may return zero for uninteresting +// values containing no pointers. +// +func (a *analysis) valueNode(v ssa.Value) nodeid { + // Value nodes for locals are created en masse by genFunc. + if id, ok := a.localval[v]; ok { + return id + } + + // Value nodes for globals are created on demand. + id, ok := a.globalval[v] + if !ok { + var comment string + if a.log != nil { + comment = v.String() + } + id = a.addNodes(v.Type(), comment) + if obj := a.objectNode(nil, v); obj != 0 { + a.addressOf(v.Type(), id, obj) + } + a.setValueNode(v, id, nil) + } + return id +} + +// valueOffsetNode ascertains the node for tuple/struct value v, +// then returns the node for its subfield #index. +// +func (a *analysis) valueOffsetNode(v ssa.Value, index int) nodeid { + id := a.valueNode(v) + if id == 0 { + panic(fmt.Sprintf("cannot offset within n0: %s = %s", v.Name(), v)) + } + return id + nodeid(a.offsetOf(v.Type(), index)) +} + +// isTaggedObject reports whether object obj is a tagged object. +func (a *analysis) isTaggedObject(obj nodeid) bool { + return a.nodes[obj].obj.flags&otTagged != 0 +} + +// taggedValue returns the dynamic type tag, the (first node of the) +// payload, and the indirect flag of the tagged object starting at id. +// Panic ensues if !isTaggedObject(id). +// +func (a *analysis) taggedValue(obj nodeid) (tDyn types.Type, v nodeid, indirect bool) { + n := a.nodes[obj] + flags := n.obj.flags + if flags&otTagged == 0 { + panic(fmt.Sprintf("not a tagged object: n%d", obj)) + } + return n.typ, obj + 1, flags&otIndirect != 0 +} + +// funcParams returns the first node of the params (P) block of the +// function whose object node (obj.flags&otFunction) is id. +// +func (a *analysis) funcParams(id nodeid) nodeid { + n := a.nodes[id] + if n.obj == nil || n.obj.flags&otFunction == 0 { + panic(fmt.Sprintf("funcParams(n%d): not a function object block", id)) + } + return id + 1 +} + +// funcResults returns the first node of the results (R) block of the +// function whose object node (obj.flags&otFunction) is id. +// +func (a *analysis) funcResults(id nodeid) nodeid { + n := a.nodes[id] + if n.obj == nil || n.obj.flags&otFunction == 0 { + panic(fmt.Sprintf("funcResults(n%d): not a function object block", id)) + } + sig := n.typ.(*types.Signature) + id += 1 + nodeid(a.sizeof(sig.Params())) + if sig.Recv() != nil { + id += nodeid(a.sizeof(sig.Recv().Type())) + } + return id +} + +// ---------- Constraint creation ---------- + +// copy creates a constraint of the form dst = src. +// sizeof is the width (in logical fields) of the copied type. +// +func (a *analysis) copy(dst, src nodeid, sizeof uint32) { + if src == dst || sizeof == 0 { + return // trivial + } + if src == 0 || dst == 0 { + panic(fmt.Sprintf("ill-typed copy dst=n%d src=n%d", dst, src)) + } + for i := uint32(0); i < sizeof; i++ { + a.addConstraint(©Constraint{dst, src}) + src++ + dst++ + } +} + +// addressOf creates a constraint of the form id = &obj. +// T is the type of the address. +func (a *analysis) addressOf(T types.Type, id, obj nodeid) { + if id == 0 { + panic("addressOf: zero id") + } + if obj == 0 { + panic("addressOf: zero obj") + } + if a.shouldTrack(T) { + a.addConstraint(&addrConstraint{id, obj}) + } +} + +// load creates a load constraint of the form dst = src[offset]. +// offset is the pointer offset in logical fields. +// sizeof is the width (in logical fields) of the loaded type. +// +func (a *analysis) load(dst, src nodeid, offset, sizeof uint32) { + if dst == 0 { + return // load of non-pointerlike value + } + if src == 0 && dst == 0 { + return // non-pointerlike operation + } + if src == 0 || dst == 0 { + panic(fmt.Sprintf("ill-typed load dst=n%d src=n%d", dst, src)) + } + for i := uint32(0); i < sizeof; i++ { + a.addConstraint(&loadConstraint{offset, dst, src}) + offset++ + dst++ + } +} + +// store creates a store constraint of the form dst[offset] = src. +// offset is the pointer offset in logical fields. +// sizeof is the width (in logical fields) of the stored type. +// +func (a *analysis) store(dst, src nodeid, offset uint32, sizeof uint32) { + if src == 0 { + return // store of non-pointerlike value + } + if src == 0 && dst == 0 { + return // non-pointerlike operation + } + if src == 0 || dst == 0 { + panic(fmt.Sprintf("ill-typed store dst=n%d src=n%d", dst, src)) + } + for i := uint32(0); i < sizeof; i++ { + a.addConstraint(&storeConstraint{offset, dst, src}) + offset++ + src++ + } +} + +// offsetAddr creates an offsetAddr constraint of the form dst = &src.#offset. +// offset is the field offset in logical fields. +// T is the type of the address. +// +func (a *analysis) offsetAddr(T types.Type, dst, src nodeid, offset uint32) { + if !a.shouldTrack(T) { + return + } + if offset == 0 { + // Simplify dst = &src->f0 + // to dst = src + // (NB: this optimisation is defeated by the identity + // field prepended to struct and array objects.) + a.copy(dst, src, 1) + } else { + a.addConstraint(&offsetAddrConstraint{offset, dst, src}) + } +} + +// typeAssert creates a typeFilter or untag constraint of the form dst = src.(T): +// typeFilter for an interface, untag for a concrete type. +// The exact flag is specified as for untagConstraint. +// +func (a *analysis) typeAssert(T types.Type, dst, src nodeid, exact bool) { + if isInterface(T) { + a.addConstraint(&typeFilterConstraint{T, dst, src}) + } else { + a.addConstraint(&untagConstraint{T, dst, src, exact}) + } +} + +// addConstraint adds c to the constraint set. +func (a *analysis) addConstraint(c constraint) { + a.constraints = append(a.constraints, c) + if a.log != nil { + fmt.Fprintf(a.log, "\t%s\n", c) + } +} + +// copyElems generates load/store constraints for *dst = *src, +// where src and dst are slices or *arrays. +// +func (a *analysis) copyElems(cgn *cgnode, typ types.Type, dst, src ssa.Value) { + tmp := a.addNodes(typ, "copy") + sz := a.sizeof(typ) + a.genLoad(cgn, tmp, src, 1, sz) + a.genStore(cgn, dst, tmp, 1, sz) +} + +// ---------- Constraint generation ---------- + +// genConv generates constraints for the conversion operation conv. +func (a *analysis) genConv(conv *ssa.Convert, cgn *cgnode) { + res := a.valueNode(conv) + if res == 0 { + return // result is non-pointerlike + } + + tSrc := conv.X.Type() + tDst := conv.Type() + + switch utSrc := tSrc.Underlying().(type) { + case *types.Slice: + // []byte/[]rune -> string? + return + + case *types.Pointer: + // *T -> unsafe.Pointer? + if tDst.Underlying() == tUnsafePtr { + return // we don't model unsafe aliasing (unsound) + } + + case *types.Basic: + switch tDst.Underlying().(type) { + case *types.Pointer: + // Treat unsafe.Pointer->*T conversions like + // new(T) and create an unaliased object. + if utSrc == tUnsafePtr { + obj := a.addNodes(mustDeref(tDst), "unsafe.Pointer conversion") + a.endObject(obj, cgn, conv) + a.addressOf(tDst, res, obj) + return + } + + case *types.Slice: + // string -> []byte/[]rune (or named aliases)? + if utSrc.Info()&types.IsString != 0 { + obj := a.addNodes(sliceToArray(tDst), "convert") + a.endObject(obj, cgn, conv) + a.addressOf(tDst, res, obj) + return + } + + case *types.Basic: + // All basic-to-basic type conversions are no-ops. + // This includes uintptr<->unsafe.Pointer conversions, + // which we (unsoundly) ignore. + return + } + } + + panic(fmt.Sprintf("illegal *ssa.Convert %s -> %s: %s", tSrc, tDst, conv.Parent())) +} + +// genAppend generates constraints for a call to append. +func (a *analysis) genAppend(instr *ssa.Call, cgn *cgnode) { + // Consider z = append(x, y). y is optional. + // This may allocate a new [1]T array; call its object w. + // We get the following constraints: + // z = x + // z = &w + // *z = *y + + x := instr.Call.Args[0] + + z := instr + a.copy(a.valueNode(z), a.valueNode(x), 1) // z = x + + if len(instr.Call.Args) == 1 { + return // no allocation for z = append(x) or _ = append(x). + } + + // TODO(adonovan): test append([]byte, ...string) []byte. + + y := instr.Call.Args[1] + tArray := sliceToArray(instr.Call.Args[0].Type()) + + var w nodeid + w = a.nextNode() + a.addNodes(tArray, "append") + a.endObject(w, cgn, instr) + + a.copyElems(cgn, tArray.Elem(), z, y) // *z = *y + a.addressOf(instr.Type(), a.valueNode(z), w) // z = &w +} + +// genBuiltinCall generates contraints for a call to a built-in. +func (a *analysis) genBuiltinCall(instr ssa.CallInstruction, cgn *cgnode) { + call := instr.Common() + switch call.Value.(*ssa.Builtin).Name() { + case "append": + // Safe cast: append cannot appear in a go or defer statement. + a.genAppend(instr.(*ssa.Call), cgn) + + case "copy": + tElem := call.Args[0].Type().Underlying().(*types.Slice).Elem() + a.copyElems(cgn, tElem, call.Args[0], call.Args[1]) + + case "panic": + a.copy(a.panicNode, a.valueNode(call.Args[0]), 1) + + case "recover": + if v := instr.Value(); v != nil { + a.copy(a.valueNode(v), a.panicNode, 1) + } + + case "print": + // In the tests, the probe might be the sole reference + // to its arg, so make sure we create nodes for it. + if len(call.Args) > 0 { + a.valueNode(call.Args[0]) + } + + case "ssa:wrapnilchk": + a.copy(a.valueNode(instr.Value()), a.valueNode(call.Args[0]), 1) + + default: + // No-ops: close len cap real imag complex print println delete. + } +} + +// shouldUseContext defines the context-sensitivity policy. It +// returns true if we should analyse all static calls to fn anew. +// +// Obviously this interface rather limits how much freedom we have to +// choose a policy. The current policy, rather arbitrarily, is true +// for intrinsics and accessor methods (actually: short, single-block, +// call-free functions). This is just a starting point. +// +func (a *analysis) shouldUseContext(fn *ssa.Function) bool { + if a.findIntrinsic(fn) != nil { + return true // treat intrinsics context-sensitively + } + if len(fn.Blocks) != 1 { + return false // too expensive + } + blk := fn.Blocks[0] + if len(blk.Instrs) > 10 { + return false // too expensive + } + if fn.Synthetic != "" && (fn.Pkg == nil || fn != fn.Pkg.Func("init")) { + return true // treat synthetic wrappers context-sensitively + } + for _, instr := range blk.Instrs { + switch instr := instr.(type) { + case ssa.CallInstruction: + // Disallow function calls (except to built-ins) + // because of the danger of unbounded recursion. + if _, ok := instr.Common().Value.(*ssa.Builtin); !ok { + return false + } + } + } + return true +} + +// genStaticCall generates constraints for a statically dispatched function call. +func (a *analysis) genStaticCall(caller *cgnode, site *callsite, call *ssa.CallCommon, result nodeid) { + fn := call.StaticCallee() + + // Special cases for inlined intrinsics. + switch fn { + case a.runtimeSetFinalizer: + // Inline SetFinalizer so the call appears direct. + site.targets = a.addOneNode(tInvalid, "SetFinalizer.targets", nil) + a.addConstraint(&runtimeSetFinalizerConstraint{ + targets: site.targets, + x: a.valueNode(call.Args[0]), + f: a.valueNode(call.Args[1]), + }) + return + + case a.reflectValueCall: + // Inline (reflect.Value).Call so the call appears direct. + dotdotdot := false + ret := reflectCallImpl(a, caller, site, a.valueNode(call.Args[0]), a.valueNode(call.Args[1]), dotdotdot) + if result != 0 { + a.addressOf(fn.Signature.Results().At(0).Type(), result, ret) + } + return + } + + // Ascertain the context (contour/cgnode) for a particular call. + var obj nodeid + if a.shouldUseContext(fn) { + obj = a.makeFunctionObject(fn, site) // new contour + } else { + obj = a.objectNode(nil, fn) // shared contour + } + a.callEdge(caller, site, obj) + + sig := call.Signature() + + // Copy receiver, if any. + params := a.funcParams(obj) + args := call.Args + if sig.Recv() != nil { + sz := a.sizeof(sig.Recv().Type()) + a.copy(params, a.valueNode(args[0]), sz) + params += nodeid(sz) + args = args[1:] + } + + // Copy actual parameters into formal params block. + // Must loop, since the actuals aren't contiguous. + for i, arg := range args { + sz := a.sizeof(sig.Params().At(i).Type()) + a.copy(params, a.valueNode(arg), sz) + params += nodeid(sz) + } + + // Copy formal results block to actual result. + if result != 0 { + a.copy(result, a.funcResults(obj), a.sizeof(sig.Results())) + } +} + +// genDynamicCall generates constraints for a dynamic function call. +func (a *analysis) genDynamicCall(caller *cgnode, site *callsite, call *ssa.CallCommon, result nodeid) { + // pts(targets) will be the set of possible call targets. + site.targets = a.valueNode(call.Value) + + // We add dynamic closure rules that store the arguments into + // the P-block and load the results from the R-block of each + // function discovered in pts(targets). + + sig := call.Signature() + var offset uint32 = 1 // P/R block starts at offset 1 + for i, arg := range call.Args { + sz := a.sizeof(sig.Params().At(i).Type()) + a.genStore(caller, call.Value, a.valueNode(arg), offset, sz) + offset += sz + } + if result != 0 { + a.genLoad(caller, result, call.Value, offset, a.sizeof(sig.Results())) + } +} + +// genInvoke generates constraints for a dynamic method invocation. +func (a *analysis) genInvoke(caller *cgnode, site *callsite, call *ssa.CallCommon, result nodeid) { + if call.Value.Type() == a.reflectType { + a.genInvokeReflectType(caller, site, call, result) + return + } + + sig := call.Signature() + + // Allocate a contiguous targets/params/results block for this call. + block := a.nextNode() + // pts(targets) will be the set of possible call targets + site.targets = a.addOneNode(sig, "invoke.targets", nil) + p := a.addNodes(sig.Params(), "invoke.params") + r := a.addNodes(sig.Results(), "invoke.results") + + // Copy the actual parameters into the call's params block. + for i, n := 0, sig.Params().Len(); i < n; i++ { + sz := a.sizeof(sig.Params().At(i).Type()) + a.copy(p, a.valueNode(call.Args[i]), sz) + p += nodeid(sz) + } + // Copy the call's results block to the actual results. + if result != 0 { + a.copy(result, r, a.sizeof(sig.Results())) + } + + // We add a dynamic invoke constraint that will connect the + // caller's and the callee's P/R blocks for each discovered + // call target. + a.addConstraint(&invokeConstraint{call.Method, a.valueNode(call.Value), block}) +} + +// genInvokeReflectType is a specialization of genInvoke where the +// receiver type is a reflect.Type, under the assumption that there +// can be at most one implementation of this interface, *reflect.rtype. +// +// (Though this may appear to be an instance of a pattern---method +// calls on interfaces known to have exactly one implementation---in +// practice it occurs rarely, so we special case for reflect.Type.) +// +// In effect we treat this: +// var rt reflect.Type = ... +// rt.F() +// as this: +// rt.(*reflect.rtype).F() +// +func (a *analysis) genInvokeReflectType(caller *cgnode, site *callsite, call *ssa.CallCommon, result nodeid) { + // Unpack receiver into rtype + rtype := a.addOneNode(a.reflectRtypePtr, "rtype.recv", nil) + recv := a.valueNode(call.Value) + a.typeAssert(a.reflectRtypePtr, rtype, recv, true) + + // Look up the concrete method. + fn := a.prog.LookupMethod(a.reflectRtypePtr, call.Method.Pkg(), call.Method.Name()) + + obj := a.makeFunctionObject(fn, site) // new contour for this call + a.callEdge(caller, site, obj) + + // From now on, it's essentially a static call, but little is + // gained by factoring together the code for both cases. + + sig := fn.Signature // concrete method + targets := a.addOneNode(sig, "call.targets", nil) + a.addressOf(sig, targets, obj) // (a singleton) + + // Copy receiver. + params := a.funcParams(obj) + a.copy(params, rtype, 1) + params++ + + // Copy actual parameters into formal P-block. + // Must loop, since the actuals aren't contiguous. + for i, arg := range call.Args { + sz := a.sizeof(sig.Params().At(i).Type()) + a.copy(params, a.valueNode(arg), sz) + params += nodeid(sz) + } + + // Copy formal R-block to actual R-block. + if result != 0 { + a.copy(result, a.funcResults(obj), a.sizeof(sig.Results())) + } +} + +// genCall generates constraints for call instruction instr. +func (a *analysis) genCall(caller *cgnode, instr ssa.CallInstruction) { + call := instr.Common() + + // Intrinsic implementations of built-in functions. + if _, ok := call.Value.(*ssa.Builtin); ok { + a.genBuiltinCall(instr, caller) + return + } + + var result nodeid + if v := instr.Value(); v != nil { + result = a.valueNode(v) + } + + site := &callsite{instr: instr} + if call.StaticCallee() != nil { + a.genStaticCall(caller, site, call, result) + } else if call.IsInvoke() { + a.genInvoke(caller, site, call, result) + } else { + a.genDynamicCall(caller, site, call, result) + } + + caller.sites = append(caller.sites, site) + + if a.log != nil { + // TODO(adonovan): debug: improve log message. + fmt.Fprintf(a.log, "\t%s to targets %s from %s\n", site, site.targets, caller) + } +} + +// objectNode returns the object to which v points, if known. +// In other words, if the points-to set of v is a singleton, it +// returns the sole label, zero otherwise. +// +// We exploit this information to make the generated constraints less +// dynamic. For example, a complex load constraint can be replaced by +// a simple copy constraint when the sole destination is known a priori. +// +// Some SSA instructions always have singletons points-to sets: +// Alloc, Function, Global, MakeChan, MakeClosure, MakeInterface, MakeMap, MakeSlice. +// Others may be singletons depending on their operands: +// FreeVar, Const, Convert, FieldAddr, IndexAddr, Slice. +// +// Idempotent. Objects are created as needed, possibly via recursion +// down the SSA value graph, e.g IndexAddr(FieldAddr(Alloc))). +// +func (a *analysis) objectNode(cgn *cgnode, v ssa.Value) nodeid { + switch v.(type) { + case *ssa.Global, *ssa.Function, *ssa.Const, *ssa.FreeVar: + // Global object. + obj, ok := a.globalobj[v] + if !ok { + switch v := v.(type) { + case *ssa.Global: + obj = a.nextNode() + a.addNodes(mustDeref(v.Type()), "global") + a.endObject(obj, nil, v) + + case *ssa.Function: + obj = a.makeFunctionObject(v, nil) + + case *ssa.Const: + // not addressable + + case *ssa.FreeVar: + // not addressable + } + + if a.log != nil { + fmt.Fprintf(a.log, "\tglobalobj[%s] = n%d\n", v, obj) + } + a.globalobj[v] = obj + } + return obj + } + + // Local object. + obj, ok := a.localobj[v] + if !ok { + switch v := v.(type) { + case *ssa.Alloc: + obj = a.nextNode() + a.addNodes(mustDeref(v.Type()), "alloc") + a.endObject(obj, cgn, v) + + case *ssa.MakeSlice: + obj = a.nextNode() + a.addNodes(sliceToArray(v.Type()), "makeslice") + a.endObject(obj, cgn, v) + + case *ssa.MakeChan: + obj = a.nextNode() + a.addNodes(v.Type().Underlying().(*types.Chan).Elem(), "makechan") + a.endObject(obj, cgn, v) + + case *ssa.MakeMap: + obj = a.nextNode() + tmap := v.Type().Underlying().(*types.Map) + a.addNodes(tmap.Key(), "makemap.key") + elem := a.addNodes(tmap.Elem(), "makemap.value") + + // To update the value field, MapUpdate + // generates store-with-offset constraints which + // the presolver can't model, so we must mark + // those nodes indirect. + for id, end := elem, elem+nodeid(a.sizeof(tmap.Elem())); id < end; id++ { + a.mapValues = append(a.mapValues, id) + } + a.endObject(obj, cgn, v) + + case *ssa.MakeInterface: + tConc := v.X.Type() + obj = a.makeTagged(tConc, cgn, v) + + // Copy the value into it, if nontrivial. + if x := a.valueNode(v.X); x != 0 { + a.copy(obj+1, x, a.sizeof(tConc)) + } + + case *ssa.FieldAddr: + if xobj := a.objectNode(cgn, v.X); xobj != 0 { + obj = xobj + nodeid(a.offsetOf(mustDeref(v.X.Type()), v.Field)) + } + + case *ssa.IndexAddr: + if xobj := a.objectNode(cgn, v.X); xobj != 0 { + obj = xobj + 1 + } + + case *ssa.Slice: + obj = a.objectNode(cgn, v.X) + + case *ssa.Convert: + // TODO(adonovan): opt: handle these cases too: + // - unsafe.Pointer->*T conversion acts like Alloc + // - string->[]byte/[]rune conversion acts like MakeSlice + } + + if a.log != nil { + fmt.Fprintf(a.log, "\tlocalobj[%s] = n%d\n", v.Name(), obj) + } + a.localobj[v] = obj + } + return obj +} + +// genLoad generates constraints for result = *(ptr + val). +func (a *analysis) genLoad(cgn *cgnode, result nodeid, ptr ssa.Value, offset, sizeof uint32) { + if obj := a.objectNode(cgn, ptr); obj != 0 { + // Pre-apply loadConstraint.solve(). + a.copy(result, obj+nodeid(offset), sizeof) + } else { + a.load(result, a.valueNode(ptr), offset, sizeof) + } +} + +// genOffsetAddr generates constraints for a 'v=ptr.field' (FieldAddr) +// or 'v=ptr[*]' (IndexAddr) instruction v. +func (a *analysis) genOffsetAddr(cgn *cgnode, v ssa.Value, ptr nodeid, offset uint32) { + dst := a.valueNode(v) + if obj := a.objectNode(cgn, v); obj != 0 { + // Pre-apply offsetAddrConstraint.solve(). + a.addressOf(v.Type(), dst, obj) + } else { + a.offsetAddr(v.Type(), dst, ptr, offset) + } +} + +// genStore generates constraints for *(ptr + offset) = val. +func (a *analysis) genStore(cgn *cgnode, ptr ssa.Value, val nodeid, offset, sizeof uint32) { + if obj := a.objectNode(cgn, ptr); obj != 0 { + // Pre-apply storeConstraint.solve(). + a.copy(obj+nodeid(offset), val, sizeof) + } else { + a.store(a.valueNode(ptr), val, offset, sizeof) + } +} + +// genInstr generates constraints for instruction instr in context cgn. +func (a *analysis) genInstr(cgn *cgnode, instr ssa.Instruction) { + if a.log != nil { + var prefix string + if val, ok := instr.(ssa.Value); ok { + prefix = val.Name() + " = " + } + fmt.Fprintf(a.log, "; %s%s\n", prefix, instr) + } + + switch instr := instr.(type) { + case *ssa.DebugRef: + // no-op. + + case *ssa.UnOp: + switch instr.Op { + case token.ARROW: // <-x + // We can ignore instr.CommaOk because the node we're + // altering is always at zero offset relative to instr + tElem := instr.X.Type().Underlying().(*types.Chan).Elem() + a.genLoad(cgn, a.valueNode(instr), instr.X, 0, a.sizeof(tElem)) + + case token.MUL: // *x + a.genLoad(cgn, a.valueNode(instr), instr.X, 0, a.sizeof(instr.Type())) + + default: + // NOT, SUB, XOR: no-op. + } + + case *ssa.BinOp: + // All no-ops. + + case ssa.CallInstruction: // *ssa.Call, *ssa.Go, *ssa.Defer + a.genCall(cgn, instr) + + case *ssa.ChangeType: + a.copy(a.valueNode(instr), a.valueNode(instr.X), 1) + + case *ssa.Convert: + a.genConv(instr, cgn) + + case *ssa.Extract: + a.copy(a.valueNode(instr), + a.valueOffsetNode(instr.Tuple, instr.Index), + a.sizeof(instr.Type())) + + case *ssa.FieldAddr: + a.genOffsetAddr(cgn, instr, a.valueNode(instr.X), + a.offsetOf(mustDeref(instr.X.Type()), instr.Field)) + + case *ssa.IndexAddr: + a.genOffsetAddr(cgn, instr, a.valueNode(instr.X), 1) + + case *ssa.Field: + a.copy(a.valueNode(instr), + a.valueOffsetNode(instr.X, instr.Field), + a.sizeof(instr.Type())) + + case *ssa.Index: + a.copy(a.valueNode(instr), 1+a.valueNode(instr.X), a.sizeof(instr.Type())) + + case *ssa.Select: + recv := a.valueOffsetNode(instr, 2) // instr : (index, recvOk, recv0, ... recv_n-1) + for _, st := range instr.States { + elemSize := a.sizeof(st.Chan.Type().Underlying().(*types.Chan).Elem()) + switch st.Dir { + case types.RecvOnly: + a.genLoad(cgn, recv, st.Chan, 0, elemSize) + recv += nodeid(elemSize) + + case types.SendOnly: + a.genStore(cgn, st.Chan, a.valueNode(st.Send), 0, elemSize) + } + } + + case *ssa.Return: + results := a.funcResults(cgn.obj) + for _, r := range instr.Results { + sz := a.sizeof(r.Type()) + a.copy(results, a.valueNode(r), sz) + results += nodeid(sz) + } + + case *ssa.Send: + a.genStore(cgn, instr.Chan, a.valueNode(instr.X), 0, a.sizeof(instr.X.Type())) + + case *ssa.Store: + a.genStore(cgn, instr.Addr, a.valueNode(instr.Val), 0, a.sizeof(instr.Val.Type())) + + case *ssa.Alloc, *ssa.MakeSlice, *ssa.MakeChan, *ssa.MakeMap, *ssa.MakeInterface: + v := instr.(ssa.Value) + a.addressOf(v.Type(), a.valueNode(v), a.objectNode(cgn, v)) + + case *ssa.ChangeInterface: + a.copy(a.valueNode(instr), a.valueNode(instr.X), 1) + + case *ssa.TypeAssert: + a.typeAssert(instr.AssertedType, a.valueNode(instr), a.valueNode(instr.X), true) + + case *ssa.Slice: + a.copy(a.valueNode(instr), a.valueNode(instr.X), 1) + + case *ssa.If, *ssa.Jump: + // no-op. + + case *ssa.Phi: + sz := a.sizeof(instr.Type()) + for _, e := range instr.Edges { + a.copy(a.valueNode(instr), a.valueNode(e), sz) + } + + case *ssa.MakeClosure: + fn := instr.Fn.(*ssa.Function) + a.copy(a.valueNode(instr), a.valueNode(fn), 1) + // Free variables are treated like global variables. + for i, b := range instr.Bindings { + a.copy(a.valueNode(fn.FreeVars[i]), a.valueNode(b), a.sizeof(b.Type())) + } + + case *ssa.RunDefers: + // The analysis is flow insensitive, so we just "call" + // defers as we encounter them. + + case *ssa.Range: + // Do nothing. Next{Iter: *ssa.Range} handles this case. + + case *ssa.Next: + if !instr.IsString { // map + // Assumes that Next is always directly applied to a Range result. + theMap := instr.Iter.(*ssa.Range).X + tMap := theMap.Type().Underlying().(*types.Map) + ksize := a.sizeof(tMap.Key()) + vsize := a.sizeof(tMap.Elem()) + + // Load from the map's (k,v) into the tuple's (ok, k, v). + a.genLoad(cgn, a.valueNode(instr)+1, theMap, 0, ksize+vsize) + } + + case *ssa.Lookup: + if tMap, ok := instr.X.Type().Underlying().(*types.Map); ok { + // CommaOk can be ignored: field 0 is a no-op. + ksize := a.sizeof(tMap.Key()) + vsize := a.sizeof(tMap.Elem()) + a.genLoad(cgn, a.valueNode(instr), instr.X, ksize, vsize) + } + + case *ssa.MapUpdate: + tmap := instr.Map.Type().Underlying().(*types.Map) + ksize := a.sizeof(tmap.Key()) + vsize := a.sizeof(tmap.Elem()) + a.genStore(cgn, instr.Map, a.valueNode(instr.Key), 0, ksize) + a.genStore(cgn, instr.Map, a.valueNode(instr.Value), ksize, vsize) + + case *ssa.Panic: + a.copy(a.panicNode, a.valueNode(instr.X), 1) + + default: + panic(fmt.Sprintf("unimplemented: %T", instr)) + } +} + +func (a *analysis) makeCGNode(fn *ssa.Function, obj nodeid, callersite *callsite) *cgnode { + cgn := &cgnode{fn: fn, obj: obj, callersite: callersite} + a.cgnodes = append(a.cgnodes, cgn) + return cgn +} + +// genRootCalls generates the synthetic root of the callgraph and the +// initial calls from it to the analysis scope, such as main, a test +// or a library. +// +func (a *analysis) genRootCalls() *cgnode { + r := a.prog.NewFunction("", new(types.Signature), "root of callgraph") + root := a.makeCGNode(r, 0, nil) + + // TODO(adonovan): make an ssa utility to construct an actual + // root function so we don't need to special-case site-less + // call edges. + + // For each main package, call main.init(), main.main(). + for _, mainPkg := range a.config.Mains { + main := mainPkg.Func("main") + if main == nil { + panic(fmt.Sprintf("%s has no main function", mainPkg)) + } + + targets := a.addOneNode(main.Signature, "root.targets", nil) + site := &callsite{targets: targets} + root.sites = append(root.sites, site) + for _, fn := range [2]*ssa.Function{mainPkg.Func("init"), main} { + if a.log != nil { + fmt.Fprintf(a.log, "\troot call to %s:\n", fn) + } + a.copy(targets, a.valueNode(fn), 1) + } + } + + return root +} + +// genFunc generates constraints for function fn. +func (a *analysis) genFunc(cgn *cgnode) { + fn := cgn.fn + + impl := a.findIntrinsic(fn) + + if a.log != nil { + fmt.Fprintf(a.log, "\n\n==== Generating constraints for %s, %s\n", cgn, cgn.contour()) + + // Hack: don't display body if intrinsic. + if impl != nil { + fn2 := *cgn.fn // copy + fn2.Locals = nil + fn2.Blocks = nil + fn2.WriteTo(a.log) + } else { + cgn.fn.WriteTo(a.log) + } + } + + if impl != nil { + impl(a, cgn) + return + } + + if fn.Blocks == nil { + // External function with no intrinsic treatment. + // We'll warn about calls to such functions at the end. + return + } + + if a.log != nil { + fmt.Fprintln(a.log, "; Creating nodes for local values") + } + + a.localval = make(map[ssa.Value]nodeid) + a.localobj = make(map[ssa.Value]nodeid) + + // The value nodes for the params are in the func object block. + params := a.funcParams(cgn.obj) + for _, p := range fn.Params { + a.setValueNode(p, params, cgn) + params += nodeid(a.sizeof(p.Type())) + } + + // Free variables have global cardinality: + // the outer function sets them with MakeClosure; + // the inner function accesses them with FreeVar. + // + // TODO(adonovan): treat free vars context-sensitively. + + // Create value nodes for all value instructions + // since SSA may contain forward references. + var space [10]*ssa.Value + for _, b := range fn.Blocks { + for _, instr := range b.Instrs { + switch instr := instr.(type) { + case *ssa.Range: + // do nothing: it has a funky type, + // and *ssa.Next does all the work. + + case ssa.Value: + var comment string + if a.log != nil { + comment = instr.Name() + } + id := a.addNodes(instr.Type(), comment) + a.setValueNode(instr, id, cgn) + } + + // Record all address-taken functions (for presolver). + rands := instr.Operands(space[:0]) + if call, ok := instr.(ssa.CallInstruction); ok && !call.Common().IsInvoke() { + // Skip CallCommon.Value in "call" mode. + // TODO(adonovan): fix: relies on unspecified ordering. Specify it. + rands = rands[1:] + } + for _, rand := range rands { + if atf, ok := (*rand).(*ssa.Function); ok { + a.atFuncs[atf] = true + } + } + } + } + + // Generate constraints for instructions. + for _, b := range fn.Blocks { + for _, instr := range b.Instrs { + a.genInstr(cgn, instr) + } + } + + a.localval = nil + a.localobj = nil +} + +// genMethodsOf generates nodes and constraints for all methods of type T. +func (a *analysis) genMethodsOf(T types.Type) { + itf := isInterface(T) + + // TODO(adonovan): can we skip this entirely if itf is true? + // I think so, but the answer may depend on reflection. + mset := a.prog.MethodSets.MethodSet(T) + for i, n := 0, mset.Len(); i < n; i++ { + m := a.prog.Method(mset.At(i)) + a.valueNode(m) + + if !itf { + // Methods of concrete types are address-taken functions. + a.atFuncs[m] = true + } + } +} + +// generate generates offline constraints for the entire program. +func (a *analysis) generate() { + start("Constraint generation") + if a.log != nil { + fmt.Fprintln(a.log, "==== Generating constraints") + } + + // Create a dummy node since we use the nodeid 0 for + // non-pointerlike variables. + a.addNodes(tInvalid, "(zero)") + + // Create the global node for panic values. + a.panicNode = a.addNodes(tEface, "panic") + + // Create nodes and constraints for all methods of reflect.rtype. + // (Shared contours are used by dynamic calls to reflect.Type + // methods---typically just String().) + if rtype := a.reflectRtypePtr; rtype != nil { + a.genMethodsOf(rtype) + } + + root := a.genRootCalls() + + if a.config.BuildCallGraph { + a.result.CallGraph = callgraph.New(root.fn) + } + + // Create nodes and constraints for all methods of all types + // that are dynamically accessible via reflection or interfaces. + for _, T := range a.prog.RuntimeTypes() { + a.genMethodsOf(T) + } + + // Generate constraints for entire program. + for len(a.genq) > 0 { + cgn := a.genq[0] + a.genq = a.genq[1:] + a.genFunc(cgn) + } + + // The runtime magically allocates os.Args; so should we. + if os := a.prog.ImportedPackage("os"); os != nil { + // In effect: os.Args = new([1]string)[:] + T := types.NewSlice(types.Typ[types.String]) + obj := a.addNodes(sliceToArray(T), "") + a.endObject(obj, nil, "") + a.addressOf(T, a.objectNode(nil, os.Var("Args")), obj) + } + + // Discard generation state, to avoid confusion after node renumbering. + a.panicNode = 0 + a.globalval = nil + a.localval = nil + a.localobj = nil + + stop("Constraint generation") +} diff --git a/vendor/golang.org/x/tools/go/pointer/hvn.go b/vendor/golang.org/x/tools/go/pointer/hvn.go new file mode 100644 index 0000000..a3ef1f3 --- /dev/null +++ b/vendor/golang.org/x/tools/go/pointer/hvn.go @@ -0,0 +1,969 @@ +package pointer + +// This file implements Hash-Value Numbering (HVN), a pre-solver +// constraint optimization described in Hardekopf & Lin, SAS'07 (see +// doc.go) that analyses the graph topology to determine which sets of +// variables are "pointer equivalent" (PE), i.e. must have identical +// points-to sets in the solution. +// +// A separate ("offline") graph is constructed. Its nodes are those of +// the main-graph, plus an additional node *X for each pointer node X. +// With this graph we can reason about the unknown points-to set of +// dereferenced pointers. (We do not generalize this to represent +// unknown fields x->f, perhaps because such fields would be numerous, +// though it might be worth an experiment.) +// +// Nodes whose points-to relations are not entirely captured by the +// graph are marked as "indirect": the *X nodes, the parameters of +// address-taken functions (which includes all functions in method +// sets), or nodes updated by the solver rules for reflection, etc. +// +// All addr (y=&x) nodes are initially assigned a pointer-equivalence +// (PE) label equal to x's nodeid in the main graph. (These are the +// only PE labels that are less than len(a.nodes).) +// +// All offsetAddr (y=&x.f) constraints are initially assigned a PE +// label; such labels are memoized, keyed by (x, f), so that equivalent +// nodes y as assigned the same label. +// +// Then we process each strongly connected component (SCC) of the graph +// in topological order, assigning it a PE label based on the set P of +// PE labels that flow to it from its immediate dependencies. +// +// If any node in P is "indirect", the entire SCC is assigned a fresh PE +// label. Otherwise: +// +// |P|=0 if P is empty, all nodes in the SCC are non-pointers (e.g. +// uninitialized variables, or formal params of dead functions) +// and the SCC is assigned the PE label of zero. +// +// |P|=1 if P is a singleton, the SCC is assigned the same label as the +// sole element of P. +// +// |P|>1 if P contains multiple labels, a unique label representing P is +// invented and recorded in an hash table, so that other +// equivalent SCCs may also be assigned this label, akin to +// conventional hash-value numbering in a compiler. +// +// Finally, a renumbering is computed such that each node is replaced by +// the lowest-numbered node with the same PE label. All constraints are +// renumbered, and any resulting duplicates are eliminated. +// +// The only nodes that are not renumbered are the objects x in addr +// (y=&x) constraints, since the ids of these nodes (and fields derived +// from them via offsetAddr rules) are the elements of all points-to +// sets, so they must remain as they are if we want the same solution. +// +// The solverStates (node.solve) for nodes in the same equivalence class +// are linked together so that all nodes in the class have the same +// solution. This avoids the need to renumber nodeids buried in +// Queries, cgnodes, etc (like (*analysis).renumber() does) since only +// the solution is needed. +// +// The result of HVN is that the number of distinct nodes and +// constraints is reduced, but the solution is identical (almost---see +// CROSS-CHECK below). In particular, both linear and cyclic chains of +// copies are each replaced by a single node. +// +// Nodes and constraints created "online" (e.g. while solving reflection +// constraints) are not subject to this optimization. +// +// PERFORMANCE +// +// In two benchmarks (oracle and godoc), HVN eliminates about two thirds +// of nodes, the majority accounted for by non-pointers: nodes of +// non-pointer type, pointers that remain nil, formal parameters of dead +// functions, nodes of untracked types, etc. It also reduces the number +// of constraints, also by about two thirds, and the solving time by +// 30--42%, although we must pay about 15% for the running time of HVN +// itself. The benefit is greater for larger applications. +// +// There are many possible optimizations to improve the performance: +// * Use fewer than 1:1 onodes to main graph nodes: many of the onodes +// we create are not needed. +// * HU (HVN with Union---see paper): coalesce "union" peLabels when +// their expanded-out sets are equal. +// * HR (HVN with deReference---see paper): this will require that we +// apply HVN until fixed point, which may need more bookkeeping of the +// correspondance of main nodes to onodes. +// * Location Equivalence (see paper): have points-to sets contain not +// locations but location-equivalence class labels, each representing +// a set of locations. +// * HVN with field-sensitive ref: model each of the fields of a +// pointer-to-struct. +// +// CROSS-CHECK +// +// To verify the soundness of the optimization, when the +// debugHVNCrossCheck option is enabled, we run the solver twice, once +// before and once after running HVN, dumping the solution to disk, and +// then we compare the results. If they are not identical, the analysis +// panics. +// +// The solution dumped to disk includes only the N*N submatrix of the +// complete solution where N is the number of nodes after generation. +// In other words, we ignore pointer variables and objects created by +// the solver itself, since their numbering depends on the solver order, +// which is affected by the optimization. In any case, that's the only +// part the client cares about. +// +// The cross-check is too strict and may fail spuriously. Although the +// H&L paper describing HVN states that the solutions obtained should be +// identical, this is not the case in practice because HVN can collapse +// cycles involving *p even when pts(p)={}. Consider this example +// distilled from testdata/hello.go: +// +// var x T +// func f(p **T) { +// t0 = *p +// ... +// t1 = φ(t0, &x) +// *p = t1 +// } +// +// If f is dead code, we get: +// unoptimized: pts(p)={} pts(t0)={} pts(t1)={&x} +// optimized: pts(p)={} pts(t0)=pts(t1)=pts(*p)={&x} +// +// It's hard to argue that this is a bug: the result is sound and the +// loss of precision is inconsequential---f is dead code, after all. +// But unfortunately it limits the usefulness of the cross-check since +// failures must be carefully analyzed. Ben Hardekopf suggests (in +// personal correspondence) some approaches to mitigating it: +// +// If there is a node with an HVN points-to set that is a superset +// of the NORM points-to set, then either it's a bug or it's a +// result of this issue. If it's a result of this issue, then in +// the offline constraint graph there should be a REF node inside +// some cycle that reaches this node, and in the NORM solution the +// pointer being dereferenced by that REF node should be the empty +// set. If that isn't true then this is a bug. If it is true, then +// you can further check that in the NORM solution the "extra" +// points-to info in the HVN solution does in fact come from that +// purported cycle (if it doesn't, then this is still a bug). If +// you're doing the further check then you'll need to do it for +// each "extra" points-to element in the HVN points-to set. +// +// There are probably ways to optimize these checks by taking +// advantage of graph properties. For example, extraneous points-to +// info will flow through the graph and end up in many +// nodes. Rather than checking every node with extra info, you +// could probably work out the "origin point" of the extra info and +// just check there. Note that the check in the first bullet is +// looking for soundness bugs, while the check in the second bullet +// is looking for precision bugs; depending on your needs, you may +// care more about one than the other. +// +// which we should evaluate. The cross-check is nonetheless invaluable +// for all but one of the programs in the pointer_test suite. + +import ( + "fmt" + "io" + "reflect" + + "golang.org/x/tools/container/intsets" + "golang.org/x/tools/go/types" +) + +// A peLabel is a pointer-equivalence label: two nodes with the same +// peLabel have identical points-to solutions. +// +// The numbers are allocated consecutively like so: +// 0 not a pointer +// 1..N-1 addrConstraints (equals the constraint's .src field, hence sparse) +// ... offsetAddr constraints +// ... SCCs (with indirect nodes or multiple inputs) +// +// Each PE label denotes a set of pointers containing a single addr, a +// single offsetAddr, or some set of other PE labels. +// +type peLabel int + +type hvn struct { + a *analysis + N int // len(a.nodes) immediately after constraint generation + log io.Writer // (optional) log of HVN lemmas + onodes []*onode // nodes of the offline graph + label peLabel // the next available PE label + hvnLabel map[string]peLabel // hash-value numbering (PE label) for each set of onodeids + stack []onodeid // DFS stack + index int32 // next onode.index, from Tarjan's SCC algorithm + + // For each distinct offsetAddrConstraint (src, offset) pair, + // offsetAddrLabels records a unique PE label >= N. + offsetAddrLabels map[offsetAddr]peLabel +} + +// The index of an node in the offline graph. +// (Currently the first N align with the main nodes, +// but this may change with HRU.) +type onodeid uint32 + +// An onode is a node in the offline constraint graph. +// (Where ambiguous, members of analysis.nodes are referred to as +// "main graph" nodes.) +// +// Edges in the offline constraint graph (edges and implicit) point to +// the source, i.e. against the flow of values: they are dependencies. +// Implicit edges are used for SCC computation, but not for gathering +// incoming labels. +// +type onode struct { + rep onodeid // index of representative of SCC in offline constraint graph + + edges intsets.Sparse // constraint edges X-->Y (this onode is X) + implicit intsets.Sparse // implicit edges *X-->*Y (this onode is X) + peLabels intsets.Sparse // set of peLabels are pointer-equivalent to this one + indirect bool // node has points-to relations not represented in graph + + // Tarjan's SCC algorithm + index, lowlink int32 // Tarjan numbering + scc int32 // -ve => on stack; 0 => unvisited; +ve => node is root of a found SCC +} + +type offsetAddr struct { + ptr nodeid + offset uint32 +} + +// nextLabel issues the next unused pointer-equivalence label. +func (h *hvn) nextLabel() peLabel { + h.label++ + return h.label +} + +// ref(X) returns the index of the onode for *X. +func (h *hvn) ref(id onodeid) onodeid { + return id + onodeid(len(h.a.nodes)) +} + +// hvn computes pointer-equivalence labels (peLabels) using the Hash-based +// Value Numbering (HVN) algorithm described in Hardekopf & Lin, SAS'07. +// +func (a *analysis) hvn() { + start("HVN") + + if a.log != nil { + fmt.Fprintf(a.log, "\n\n==== Pointer equivalence optimization\n\n") + } + + h := hvn{ + a: a, + N: len(a.nodes), + log: a.log, + hvnLabel: make(map[string]peLabel), + offsetAddrLabels: make(map[offsetAddr]peLabel), + } + + if h.log != nil { + fmt.Fprintf(h.log, "\nCreating offline graph nodes...\n") + } + + // Create offline nodes. The first N nodes correspond to main + // graph nodes; the next N are their corresponding ref() nodes. + h.onodes = make([]*onode, 2*h.N) + for id := range a.nodes { + id := onodeid(id) + h.onodes[id] = &onode{} + h.onodes[h.ref(id)] = &onode{indirect: true} + } + + // Each node initially represents just itself. + for id, o := range h.onodes { + o.rep = onodeid(id) + } + + h.markIndirectNodes() + + // Reserve the first N PE labels for addrConstraints. + h.label = peLabel(h.N) + + // Add offline constraint edges. + if h.log != nil { + fmt.Fprintf(h.log, "\nAdding offline graph edges...\n") + } + for _, c := range a.constraints { + if debugHVNVerbose && h.log != nil { + fmt.Fprintf(h.log, "; %s\n", c) + } + c.presolve(&h) + } + + // Find and collapse SCCs. + if h.log != nil { + fmt.Fprintf(h.log, "\nFinding SCCs...\n") + } + h.index = 1 + for id, o := range h.onodes { + if id > 0 && o.index == 0 { + // Start depth-first search at each unvisited node. + h.visit(onodeid(id)) + } + } + + // Dump the solution + // (NB: somewhat redundant with logging from simplify().) + if debugHVNVerbose && h.log != nil { + fmt.Fprintf(h.log, "\nPointer equivalences:\n") + for id, o := range h.onodes { + if id == 0 { + continue + } + if id == int(h.N) { + fmt.Fprintf(h.log, "---\n") + } + fmt.Fprintf(h.log, "o%d\t", id) + if o.rep != onodeid(id) { + fmt.Fprintf(h.log, "rep=o%d", o.rep) + } else { + fmt.Fprintf(h.log, "p%d", o.peLabels.Min()) + if o.indirect { + fmt.Fprint(h.log, " indirect") + } + } + fmt.Fprintln(h.log) + } + } + + // Simplify the main constraint graph + h.simplify() + + a.showCounts() + + stop("HVN") +} + +// ---- constraint-specific rules ---- + +// dst := &src +func (c *addrConstraint) presolve(h *hvn) { + // Each object (src) is an initial PE label. + label := peLabel(c.src) // label < N + if debugHVNVerbose && h.log != nil { + // duplicate log messages are possible + fmt.Fprintf(h.log, "\tcreate p%d: {&n%d}\n", label, c.src) + } + odst := onodeid(c.dst) + osrc := onodeid(c.src) + + // Assign dst this label. + h.onodes[odst].peLabels.Insert(int(label)) + if debugHVNVerbose && h.log != nil { + fmt.Fprintf(h.log, "\to%d has p%d\n", odst, label) + } + + h.addImplicitEdge(h.ref(odst), osrc) // *dst ~~> src. +} + +// dst = src +func (c *copyConstraint) presolve(h *hvn) { + odst := onodeid(c.dst) + osrc := onodeid(c.src) + h.addEdge(odst, osrc) // dst --> src + h.addImplicitEdge(h.ref(odst), h.ref(osrc)) // *dst ~~> *src +} + +// dst = *src + offset +func (c *loadConstraint) presolve(h *hvn) { + odst := onodeid(c.dst) + osrc := onodeid(c.src) + if c.offset == 0 { + h.addEdge(odst, h.ref(osrc)) // dst --> *src + } else { + // We don't interpret load-with-offset, e.g. results + // of map value lookup, R-block of dynamic call, slice + // copy/append, reflection. + h.markIndirect(odst, "load with offset") + } +} + +// *dst + offset = src +func (c *storeConstraint) presolve(h *hvn) { + odst := onodeid(c.dst) + osrc := onodeid(c.src) + if c.offset == 0 { + h.onodes[h.ref(odst)].edges.Insert(int(osrc)) // *dst --> src + if debugHVNVerbose && h.log != nil { + fmt.Fprintf(h.log, "\to%d --> o%d\n", h.ref(odst), osrc) + } + } else { + // We don't interpret store-with-offset. + // See discussion of soundness at markIndirectNodes. + } +} + +// dst = &src.offset +func (c *offsetAddrConstraint) presolve(h *hvn) { + // Give each distinct (addr, offset) pair a fresh PE label. + // The cache performs CSE, effectively. + key := offsetAddr{c.src, c.offset} + label, ok := h.offsetAddrLabels[key] + if !ok { + label = h.nextLabel() + h.offsetAddrLabels[key] = label + if debugHVNVerbose && h.log != nil { + fmt.Fprintf(h.log, "\tcreate p%d: {&n%d.#%d}\n", + label, c.src, c.offset) + } + } + + // Assign dst this label. + h.onodes[c.dst].peLabels.Insert(int(label)) + if debugHVNVerbose && h.log != nil { + fmt.Fprintf(h.log, "\to%d has p%d\n", c.dst, label) + } +} + +// dst = src.(typ) where typ is an interface +func (c *typeFilterConstraint) presolve(h *hvn) { + h.markIndirect(onodeid(c.dst), "typeFilter result") +} + +// dst = src.(typ) where typ is concrete +func (c *untagConstraint) presolve(h *hvn) { + odst := onodeid(c.dst) + for end := odst + onodeid(h.a.sizeof(c.typ)); odst < end; odst++ { + h.markIndirect(odst, "untag result") + } +} + +// dst = src.method(c.params...) +func (c *invokeConstraint) presolve(h *hvn) { + // All methods are address-taken functions, so + // their formal P-blocks were already marked indirect. + + // Mark the caller's targets node as indirect. + sig := c.method.Type().(*types.Signature) + id := c.params + h.markIndirect(onodeid(c.params), "invoke targets node") + id++ + + id += nodeid(h.a.sizeof(sig.Params())) + + // Mark the caller's R-block as indirect. + end := id + nodeid(h.a.sizeof(sig.Results())) + for id < end { + h.markIndirect(onodeid(id), "invoke R-block") + id++ + } +} + +// markIndirectNodes marks as indirect nodes whose points-to relations +// are not entirely captured by the offline graph, including: +// +// (a) All address-taken nodes (including the following nodes within +// the same object). This is described in the paper. +// +// The most subtle cause of indirect nodes is the generation of +// store-with-offset constraints since the offline graph doesn't +// represent them. A global audit of constraint generation reveals the +// following uses of store-with-offset: +// +// (b) genDynamicCall, for P-blocks of dynamically called functions, +// to which dynamic copy edges will be added to them during +// solving: from storeConstraint for standalone functions, +// and from invokeConstraint for methods. +// All such P-blocks must be marked indirect. +// (c) MakeUpdate, to update the value part of a map object. +// All MakeMap objects's value parts must be marked indirect. +// (d) copyElems, to update the destination array. +// All array elements must be marked indirect. +// +// Not all indirect marking happens here. ref() nodes are marked +// indirect at construction, and each constraint's presolve() method may +// mark additional nodes. +// +func (h *hvn) markIndirectNodes() { + // (a) all address-taken nodes, plus all nodes following them + // within the same object, since these may be indirectly + // stored or address-taken. + for _, c := range h.a.constraints { + if c, ok := c.(*addrConstraint); ok { + start := h.a.enclosingObj(c.src) + end := start + nodeid(h.a.nodes[start].obj.size) + for id := c.src; id < end; id++ { + h.markIndirect(onodeid(id), "A-T object") + } + } + } + + // (b) P-blocks of all address-taken functions. + for id := 0; id < h.N; id++ { + obj := h.a.nodes[id].obj + + // TODO(adonovan): opt: if obj.cgn.fn is a method and + // obj.cgn is not its shared contour, this is an + // "inlined" static method call. We needn't consider it + // address-taken since no invokeConstraint will affect it. + + if obj != nil && obj.flags&otFunction != 0 && h.a.atFuncs[obj.cgn.fn] { + // address-taken function + if debugHVNVerbose && h.log != nil { + fmt.Fprintf(h.log, "n%d is address-taken: %s\n", id, obj.cgn.fn) + } + h.markIndirect(onodeid(id), "A-T func identity") + id++ + sig := obj.cgn.fn.Signature + psize := h.a.sizeof(sig.Params()) + if sig.Recv() != nil { + psize += h.a.sizeof(sig.Recv().Type()) + } + for end := id + int(psize); id < end; id++ { + h.markIndirect(onodeid(id), "A-T func P-block") + } + id-- + continue + } + } + + // (c) all map objects' value fields. + for _, id := range h.a.mapValues { + h.markIndirect(onodeid(id), "makemap.value") + } + + // (d) all array element objects. + // TODO(adonovan): opt: can we do better? + for id := 0; id < h.N; id++ { + // Identity node for an object of array type? + if tArray, ok := h.a.nodes[id].typ.(*types.Array); ok { + // Mark the array element nodes indirect. + // (Skip past the identity field.) + for _ = range h.a.flatten(tArray.Elem()) { + id++ + h.markIndirect(onodeid(id), "array elem") + } + } + } +} + +func (h *hvn) markIndirect(oid onodeid, comment string) { + h.onodes[oid].indirect = true + if debugHVNVerbose && h.log != nil { + fmt.Fprintf(h.log, "\to%d is indirect: %s\n", oid, comment) + } +} + +// Adds an edge dst-->src. +// Note the unusual convention: edges are dependency (contraflow) edges. +func (h *hvn) addEdge(odst, osrc onodeid) { + h.onodes[odst].edges.Insert(int(osrc)) + if debugHVNVerbose && h.log != nil { + fmt.Fprintf(h.log, "\to%d --> o%d\n", odst, osrc) + } +} + +func (h *hvn) addImplicitEdge(odst, osrc onodeid) { + h.onodes[odst].implicit.Insert(int(osrc)) + if debugHVNVerbose && h.log != nil { + fmt.Fprintf(h.log, "\to%d ~~> o%d\n", odst, osrc) + } +} + +// visit implements the depth-first search of Tarjan's SCC algorithm. +// Precondition: x is canonical. +func (h *hvn) visit(x onodeid) { + h.checkCanonical(x) + xo := h.onodes[x] + xo.index = h.index + xo.lowlink = h.index + h.index++ + + h.stack = append(h.stack, x) // push + assert(xo.scc == 0, "node revisited") + xo.scc = -1 + + var deps []int + deps = xo.edges.AppendTo(deps) + deps = xo.implicit.AppendTo(deps) + + for _, y := range deps { + // Loop invariant: x is canonical. + + y := h.find(onodeid(y)) + + if x == y { + continue // nodes already coalesced + } + + xo := h.onodes[x] + yo := h.onodes[y] + + switch { + case yo.scc > 0: + // y is already a collapsed SCC + + case yo.scc < 0: + // y is on the stack, and thus in the current SCC. + if yo.index < xo.lowlink { + xo.lowlink = yo.index + } + + default: + // y is unvisited; visit it now. + h.visit(y) + // Note: x and y are now non-canonical. + + x = h.find(onodeid(x)) + + if yo.lowlink < xo.lowlink { + xo.lowlink = yo.lowlink + } + } + } + h.checkCanonical(x) + + // Is x the root of an SCC? + if xo.lowlink == xo.index { + // Coalesce all nodes in the SCC. + if debugHVNVerbose && h.log != nil { + fmt.Fprintf(h.log, "scc o%d\n", x) + } + for { + // Pop y from stack. + i := len(h.stack) - 1 + y := h.stack[i] + h.stack = h.stack[:i] + + h.checkCanonical(x) + xo := h.onodes[x] + h.checkCanonical(y) + yo := h.onodes[y] + + if xo == yo { + // SCC is complete. + xo.scc = 1 + h.labelSCC(x) + break + } + h.coalesce(x, y) + } + } +} + +// Precondition: x is canonical. +func (h *hvn) labelSCC(x onodeid) { + h.checkCanonical(x) + xo := h.onodes[x] + xpe := &xo.peLabels + + // All indirect nodes get new labels. + if xo.indirect { + label := h.nextLabel() + if debugHVNVerbose && h.log != nil { + fmt.Fprintf(h.log, "\tcreate p%d: indirect SCC\n", label) + fmt.Fprintf(h.log, "\to%d has p%d\n", x, label) + } + + // Remove pre-labeling, in case a direct pre-labeled node was + // merged with an indirect one. + xpe.Clear() + xpe.Insert(int(label)) + + return + } + + // Invariant: all peLabels sets are non-empty. + // Those that are logically empty contain zero as their sole element. + // No other sets contains zero. + + // Find all labels coming in to the coalesced SCC node. + for _, y := range xo.edges.AppendTo(nil) { + y := h.find(onodeid(y)) + if y == x { + continue // already coalesced + } + ype := &h.onodes[y].peLabels + if debugHVNVerbose && h.log != nil { + fmt.Fprintf(h.log, "\tedge from o%d = %s\n", y, ype) + } + + if ype.IsEmpty() { + if debugHVNVerbose && h.log != nil { + fmt.Fprintf(h.log, "\tnode has no PE label\n") + } + } + assert(!ype.IsEmpty(), "incoming node has no PE label") + + if ype.Has(0) { + // {0} represents a non-pointer. + assert(ype.Len() == 1, "PE set contains {0, ...}") + } else { + xpe.UnionWith(ype) + } + } + + switch xpe.Len() { + case 0: + // SCC has no incoming non-zero PE labels: it is a non-pointer. + xpe.Insert(0) + + case 1: + // already a singleton + + default: + // SCC has multiple incoming non-zero PE labels. + // Find the canonical label representing this set. + // We use String() as a fingerprint consistent with Equals(). + key := xpe.String() + label, ok := h.hvnLabel[key] + if !ok { + label = h.nextLabel() + if debugHVNVerbose && h.log != nil { + fmt.Fprintf(h.log, "\tcreate p%d: union %s\n", label, xpe.String()) + } + h.hvnLabel[key] = label + } + xpe.Clear() + xpe.Insert(int(label)) + } + + if debugHVNVerbose && h.log != nil { + fmt.Fprintf(h.log, "\to%d has p%d\n", x, xpe.Min()) + } +} + +// coalesce combines two nodes in the offline constraint graph. +// Precondition: x and y are canonical. +func (h *hvn) coalesce(x, y onodeid) { + xo := h.onodes[x] + yo := h.onodes[y] + + // x becomes y's canonical representative. + yo.rep = x + + if debugHVNVerbose && h.log != nil { + fmt.Fprintf(h.log, "\tcoalesce o%d into o%d\n", y, x) + } + + // x accumulates y's edges. + xo.edges.UnionWith(&yo.edges) + yo.edges.Clear() + + // x accumulates y's implicit edges. + xo.implicit.UnionWith(&yo.implicit) + yo.implicit.Clear() + + // x accumulates y's pointer-equivalence labels. + xo.peLabels.UnionWith(&yo.peLabels) + yo.peLabels.Clear() + + // x accumulates y's indirect flag. + if yo.indirect { + xo.indirect = true + } +} + +// simplify computes a degenerate renumbering of nodeids from the PE +// labels assigned by the hvn, and uses it to simplify the main +// constraint graph, eliminating non-pointer nodes and duplicate +// constraints. +// +func (h *hvn) simplify() { + // canon maps each peLabel to its canonical main node. + canon := make([]nodeid, h.label) + for i := range canon { + canon[i] = nodeid(h.N) // indicates "unset" + } + + // mapping maps each main node index to the index of the canonical node. + mapping := make([]nodeid, len(h.a.nodes)) + + for id := range h.a.nodes { + id := nodeid(id) + if id == 0 { + canon[0] = 0 + mapping[0] = 0 + continue + } + oid := h.find(onodeid(id)) + peLabels := &h.onodes[oid].peLabels + assert(peLabels.Len() == 1, "PE class is not a singleton") + label := peLabel(peLabels.Min()) + + canonId := canon[label] + if canonId == nodeid(h.N) { + // id becomes the representative of the PE label. + canonId = id + canon[label] = canonId + + if h.a.log != nil { + fmt.Fprintf(h.a.log, "\tpts(n%d) is canonical : \t(%s)\n", + id, h.a.nodes[id].typ) + } + + } else { + // Link the solver states for the two nodes. + assert(h.a.nodes[canonId].solve != nil, "missing solver state") + h.a.nodes[id].solve = h.a.nodes[canonId].solve + + if h.a.log != nil { + // TODO(adonovan): debug: reorganize the log so it prints + // one line: + // pe y = x1, ..., xn + // for each canonical y. Requires allocation. + fmt.Fprintf(h.a.log, "\tpts(n%d) = pts(n%d) : %s\n", + id, canonId, h.a.nodes[id].typ) + } + } + + mapping[id] = canonId + } + + // Renumber the constraints, eliminate duplicates, and eliminate + // any containing non-pointers (n0). + addrs := make(map[addrConstraint]bool) + copys := make(map[copyConstraint]bool) + loads := make(map[loadConstraint]bool) + stores := make(map[storeConstraint]bool) + offsetAddrs := make(map[offsetAddrConstraint]bool) + untags := make(map[untagConstraint]bool) + typeFilters := make(map[typeFilterConstraint]bool) + invokes := make(map[invokeConstraint]bool) + + nbefore := len(h.a.constraints) + cc := h.a.constraints[:0] // in-situ compaction + for _, c := range h.a.constraints { + // Renumber. + switch c := c.(type) { + case *addrConstraint: + // Don't renumber c.src since it is the label of + // an addressable object and will appear in PT sets. + c.dst = mapping[c.dst] + default: + c.renumber(mapping) + } + + if c.ptr() == 0 { + continue // skip: constraint attached to non-pointer + } + + var dup bool + switch c := c.(type) { + case *addrConstraint: + _, dup = addrs[*c] + addrs[*c] = true + + case *copyConstraint: + if c.src == c.dst { + continue // skip degenerate copies + } + if c.src == 0 { + continue // skip copy from non-pointer + } + _, dup = copys[*c] + copys[*c] = true + + case *loadConstraint: + if c.src == 0 { + continue // skip load from non-pointer + } + _, dup = loads[*c] + loads[*c] = true + + case *storeConstraint: + if c.src == 0 { + continue // skip store from non-pointer + } + _, dup = stores[*c] + stores[*c] = true + + case *offsetAddrConstraint: + if c.src == 0 { + continue // skip offset from non-pointer + } + _, dup = offsetAddrs[*c] + offsetAddrs[*c] = true + + case *untagConstraint: + if c.src == 0 { + continue // skip untag of non-pointer + } + _, dup = untags[*c] + untags[*c] = true + + case *typeFilterConstraint: + if c.src == 0 { + continue // skip filter of non-pointer + } + _, dup = typeFilters[*c] + typeFilters[*c] = true + + case *invokeConstraint: + if c.params == 0 { + panic("non-pointer invoke.params") + } + if c.iface == 0 { + continue // skip invoke on non-pointer + } + _, dup = invokes[*c] + invokes[*c] = true + + default: + // We don't bother de-duping advanced constraints + // (e.g. reflection) since they are uncommon. + + // Eliminate constraints containing non-pointer nodeids. + // + // We use reflection to find the fields to avoid + // adding yet another method to constraint. + // + // TODO(adonovan): experiment with a constraint + // method that returns a slice of pointers to + // nodeids fields to enable uniform iteration; + // the renumber() method could be removed and + // implemented using the new one. + // + // TODO(adonovan): opt: this is unsound since + // some constraints still have an effect if one + // of the operands is zero: rVCall, rVMapIndex, + // rvSetMapIndex. Handle them specially. + rtNodeid := reflect.TypeOf(nodeid(0)) + x := reflect.ValueOf(c).Elem() + for i, nf := 0, x.NumField(); i < nf; i++ { + f := x.Field(i) + if f.Type() == rtNodeid { + if f.Uint() == 0 { + dup = true // skip it + break + } + } + } + } + if dup { + continue // skip duplicates + } + + cc = append(cc, c) + } + h.a.constraints = cc + + if h.log != nil { + fmt.Fprintf(h.log, "#constraints: was %d, now %d\n", nbefore, len(h.a.constraints)) + } +} + +// find returns the canonical onodeid for x. +// (The onodes form a disjoint set forest.) +func (h *hvn) find(x onodeid) onodeid { + // TODO(adonovan): opt: this is a CPU hotspot. Try "union by rank". + xo := h.onodes[x] + rep := xo.rep + if rep != x { + rep = h.find(rep) // simple path compression + xo.rep = rep + } + return rep +} + +func (h *hvn) checkCanonical(x onodeid) { + if debugHVN { + assert(x == h.find(x), "not canonical") + } +} + +func assert(p bool, msg string) { + if debugHVN && !p { + panic("assertion failed: " + msg) + } +} diff --git a/vendor/golang.org/x/tools/go/pointer/intrinsics.go b/vendor/golang.org/x/tools/go/pointer/intrinsics.go new file mode 100644 index 0000000..251c0e2 --- /dev/null +++ b/vendor/golang.org/x/tools/go/pointer/intrinsics.go @@ -0,0 +1,380 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package pointer + +// This package defines the treatment of intrinsics, i.e. library +// functions requiring special analytical treatment. +// +// Most of these are C or assembly functions, but even some Go +// functions require may special treatment if the analysis completely +// replaces the implementation of an API such as reflection. + +// TODO(adonovan): support a means of writing analytic summaries in +// the target code, so that users can summarise the effects of their +// own C functions using a snippet of Go. + +import ( + "fmt" + + "golang.org/x/tools/go/ssa" + "golang.org/x/tools/go/types" +) + +// Instances of 'intrinsic' generate analysis constraints for calls to +// intrinsic functions. +// Implementations may exploit information from the calling site +// via cgn.callersite; for shared contours this is nil. +type intrinsic func(a *analysis, cgn *cgnode) + +// Initialized in explicit init() to defeat (spurious) initialization +// cycle error. +var intrinsicsByName = make(map[string]intrinsic) + +func init() { + // Key strings are from Function.String(). + // That little dot ۰ is an Arabic zero numeral (U+06F0), + // categories [Nd]. + for name, fn := range map[string]intrinsic{ + // Other packages. + "bytes.Equal": ext۰NoEffect, + "bytes.IndexByte": ext۰NoEffect, + "crypto/aes.decryptBlockAsm": ext۰NoEffect, + "crypto/aes.encryptBlockAsm": ext۰NoEffect, + "crypto/aes.expandKeyAsm": ext۰NoEffect, + "crypto/aes.hasAsm": ext۰NoEffect, + "crypto/md5.block": ext۰NoEffect, + "crypto/rc4.xorKeyStream": ext۰NoEffect, + "crypto/sha1.block": ext۰NoEffect, + "crypto/sha256.block": ext۰NoEffect, + "hash/crc32.castagnoliSSE42": ext۰NoEffect, + "hash/crc32.haveSSE42": ext۰NoEffect, + "math.Abs": ext۰NoEffect, + "math.Acos": ext۰NoEffect, + "math.Asin": ext۰NoEffect, + "math.Atan": ext۰NoEffect, + "math.Atan2": ext۰NoEffect, + "math.Ceil": ext۰NoEffect, + "math.Cos": ext۰NoEffect, + "math.Dim": ext۰NoEffect, + "math.Exp": ext۰NoEffect, + "math.Exp2": ext۰NoEffect, + "math.Expm1": ext۰NoEffect, + "math.Float32bits": ext۰NoEffect, + "math.Float32frombits": ext۰NoEffect, + "math.Float64bits": ext۰NoEffect, + "math.Float64frombits": ext۰NoEffect, + "math.Floor": ext۰NoEffect, + "math.Frexp": ext۰NoEffect, + "math.Hypot": ext۰NoEffect, + "math.Ldexp": ext۰NoEffect, + "math.Log": ext۰NoEffect, + "math.Log10": ext۰NoEffect, + "math.Log1p": ext۰NoEffect, + "math.Log2": ext۰NoEffect, + "math.Max": ext۰NoEffect, + "math.Min": ext۰NoEffect, + "math.Mod": ext۰NoEffect, + "math.Modf": ext۰NoEffect, + "math.Remainder": ext۰NoEffect, + "math.Sin": ext۰NoEffect, + "math.Sincos": ext۰NoEffect, + "math.Sqrt": ext۰NoEffect, + "math.Tan": ext۰NoEffect, + "math.Trunc": ext۰NoEffect, + "math/big.addMulVVW": ext۰NoEffect, + "math/big.addVV": ext۰NoEffect, + "math/big.addVW": ext۰NoEffect, + "math/big.bitLen": ext۰NoEffect, + "math/big.divWVW": ext۰NoEffect, + "math/big.divWW": ext۰NoEffect, + "math/big.mulAddVWW": ext۰NoEffect, + "math/big.mulWW": ext۰NoEffect, + "math/big.shlVU": ext۰NoEffect, + "math/big.shrVU": ext۰NoEffect, + "math/big.subVV": ext۰NoEffect, + "math/big.subVW": ext۰NoEffect, + "net.runtime_Semacquire": ext۰NoEffect, + "net.runtime_Semrelease": ext۰NoEffect, + "net.runtime_pollClose": ext۰NoEffect, + "net.runtime_pollOpen": ext۰NoEffect, + "net.runtime_pollReset": ext۰NoEffect, + "net.runtime_pollServerInit": ext۰NoEffect, + "net.runtime_pollSetDeadline": ext۰NoEffect, + "net.runtime_pollUnblock": ext۰NoEffect, + "net.runtime_pollWait": ext۰NoEffect, + "net.runtime_pollWaitCanceled": ext۰NoEffect, + "os.epipecheck": ext۰NoEffect, + "runtime.BlockProfile": ext۰NoEffect, + "runtime.Breakpoint": ext۰NoEffect, + "runtime.CPUProfile": ext۰NoEffect, // good enough + "runtime.Caller": ext۰NoEffect, + "runtime.Callers": ext۰NoEffect, // good enough + "runtime.FuncForPC": ext۰NoEffect, + "runtime.GC": ext۰NoEffect, + "runtime.GOMAXPROCS": ext۰NoEffect, + "runtime.Goexit": ext۰NoEffect, + "runtime.GoroutineProfile": ext۰NoEffect, + "runtime.Gosched": ext۰NoEffect, + "runtime.MemProfile": ext۰NoEffect, + "runtime.NumCPU": ext۰NoEffect, + "runtime.NumGoroutine": ext۰NoEffect, + "runtime.ReadMemStats": ext۰NoEffect, + "runtime.SetBlockProfileRate": ext۰NoEffect, + "runtime.SetCPUProfileRate": ext۰NoEffect, + "runtime.SetFinalizer": ext۰runtime۰SetFinalizer, + "runtime.Stack": ext۰NoEffect, + "runtime.ThreadCreateProfile": ext۰NoEffect, + "runtime.cstringToGo": ext۰NoEffect, + "runtime.funcentry_go": ext۰NoEffect, + "runtime.funcline_go": ext۰NoEffect, + "runtime.funcname_go": ext۰NoEffect, + "runtime.getgoroot": ext۰NoEffect, + "runtime/pprof.runtime_cyclesPerSecond": ext۰NoEffect, + "strings.IndexByte": ext۰NoEffect, + "sync.runtime_Semacquire": ext۰NoEffect, + "sync.runtime_Semrelease": ext۰NoEffect, + "sync.runtime_Syncsemacquire": ext۰NoEffect, + "sync.runtime_Syncsemcheck": ext۰NoEffect, + "sync.runtime_Syncsemrelease": ext۰NoEffect, + "sync.runtime_procPin": ext۰NoEffect, + "sync.runtime_procUnpin": ext۰NoEffect, + "sync.runtime_registerPool": ext۰NoEffect, + "sync/atomic.AddInt32": ext۰NoEffect, + "sync/atomic.AddInt64": ext۰NoEffect, + "sync/atomic.AddUint32": ext۰NoEffect, + "sync/atomic.AddUint64": ext۰NoEffect, + "sync/atomic.AddUintptr": ext۰NoEffect, + "sync/atomic.CompareAndSwapInt32": ext۰NoEffect, + "sync/atomic.CompareAndSwapUint32": ext۰NoEffect, + "sync/atomic.CompareAndSwapUint64": ext۰NoEffect, + "sync/atomic.CompareAndSwapUintptr": ext۰NoEffect, + "sync/atomic.LoadInt32": ext۰NoEffect, + "sync/atomic.LoadInt64": ext۰NoEffect, + "sync/atomic.LoadPointer": ext۰NoEffect, // ignore unsafe.Pointers + "sync/atomic.LoadUint32": ext۰NoEffect, + "sync/atomic.LoadUint64": ext۰NoEffect, + "sync/atomic.LoadUintptr": ext۰NoEffect, + "sync/atomic.StoreInt32": ext۰NoEffect, + "sync/atomic.StorePointer": ext۰NoEffect, // ignore unsafe.Pointers + "sync/atomic.StoreUint32": ext۰NoEffect, + "sync/atomic.StoreUintptr": ext۰NoEffect, + "syscall.Close": ext۰NoEffect, + "syscall.Exit": ext۰NoEffect, + "syscall.Getpid": ext۰NoEffect, + "syscall.Getwd": ext۰NoEffect, + "syscall.Kill": ext۰NoEffect, + "syscall.RawSyscall": ext۰NoEffect, + "syscall.RawSyscall6": ext۰NoEffect, + "syscall.Syscall": ext۰NoEffect, + "syscall.Syscall6": ext۰NoEffect, + "syscall.runtime_AfterFork": ext۰NoEffect, + "syscall.runtime_BeforeFork": ext۰NoEffect, + "syscall.setenv_c": ext۰NoEffect, + "time.Sleep": ext۰NoEffect, + "time.now": ext۰NoEffect, + "time.startTimer": ext۰time۰startTimer, + "time.stopTimer": ext۰NoEffect, + } { + intrinsicsByName[name] = fn + } +} + +// findIntrinsic returns the constraint generation function for an +// intrinsic function fn, or nil if the function should be handled normally. +// +func (a *analysis) findIntrinsic(fn *ssa.Function) intrinsic { + // Consult the *Function-keyed cache. + // A cached nil indicates a normal non-intrinsic function. + impl, ok := a.intrinsics[fn] + if !ok { + impl = intrinsicsByName[fn.String()] // may be nil + + if a.isReflect(fn) { + if !a.config.Reflection { + impl = ext۰NoEffect // reflection disabled + } else if impl == nil { + // Ensure all "reflect" code is treated intrinsically. + impl = ext۰NotYetImplemented + } + } + + a.intrinsics[fn] = impl + } + return impl +} + +// isReflect reports whether fn belongs to the "reflect" package. +func (a *analysis) isReflect(fn *ssa.Function) bool { + if a.reflectValueObj == nil { + return false // "reflect" package not loaded + } + reflectPackage := a.reflectValueObj.Pkg() + if fn.Pkg != nil && fn.Pkg.Object == reflectPackage { + return true + } + // Synthetic wrappers have a nil Pkg, so they slip through the + // previous check. Check the receiver package. + // TODO(adonovan): should synthetic wrappers have a non-nil Pkg? + if recv := fn.Signature.Recv(); recv != nil { + if named, ok := deref(recv.Type()).(*types.Named); ok { + if named.Obj().Pkg() == reflectPackage { + return true // e.g. wrapper of (reflect.Value).f + } + } + } + return false +} + +// A trivial intrinsic suitable for any function that does not: +// 1) induce aliases between its arguments or any global variables; +// 2) call any functions; or +// 3) create any labels. +// +// Many intrinsics (such as CompareAndSwapInt32) have a fourth kind of +// effect: loading or storing through a pointer. Though these could +// be significant, we deliberately ignore them because they are +// generally not worth the effort. +// +// We sometimes violate condition #3 if the function creates only +// non-function labels, as the control-flow graph is still sound. +// +func ext۰NoEffect(a *analysis, cgn *cgnode) {} + +func ext۰NotYetImplemented(a *analysis, cgn *cgnode) { + fn := cgn.fn + a.warnf(fn.Pos(), "unsound: intrinsic treatment of %s not yet implemented", fn) +} + +// ---------- func runtime.SetFinalizer(x, f interface{}) ---------- + +// runtime.SetFinalizer(x, f) +type runtimeSetFinalizerConstraint struct { + targets nodeid // (indirect) + f nodeid // (ptr) + x nodeid +} + +func (c *runtimeSetFinalizerConstraint) ptr() nodeid { return c.f } +func (c *runtimeSetFinalizerConstraint) presolve(h *hvn) { + h.markIndirect(onodeid(c.targets), "SetFinalizer.targets") +} +func (c *runtimeSetFinalizerConstraint) renumber(mapping []nodeid) { + c.targets = mapping[c.targets] + c.f = mapping[c.f] + c.x = mapping[c.x] +} + +func (c *runtimeSetFinalizerConstraint) String() string { + return fmt.Sprintf("runtime.SetFinalizer(n%d, n%d)", c.x, c.f) +} + +func (c *runtimeSetFinalizerConstraint) solve(a *analysis, delta *nodeset) { + for _, fObj := range delta.AppendTo(a.deltaSpace) { + tDyn, f, indirect := a.taggedValue(nodeid(fObj)) + if indirect { + // TODO(adonovan): we'll need to implement this + // when we start creating indirect tagged objects. + panic("indirect tagged object") + } + + tSig, ok := tDyn.Underlying().(*types.Signature) + if !ok { + continue // not a function + } + if tSig.Recv() != nil { + panic(tSig) + } + if tSig.Params().Len() != 1 { + continue // not a unary function + } + + // Extract x to tmp. + tx := tSig.Params().At(0).Type() + tmp := a.addNodes(tx, "SetFinalizer.tmp") + a.typeAssert(tx, tmp, c.x, false) + + // Call f(tmp). + a.store(f, tmp, 1, a.sizeof(tx)) + + // Add dynamic call target. + if a.onlineCopy(c.targets, f) { + a.addWork(c.targets) + } + } +} + +func ext۰runtime۰SetFinalizer(a *analysis, cgn *cgnode) { + // This is the shared contour, used for dynamic calls. + targets := a.addOneNode(tInvalid, "SetFinalizer.targets", nil) + cgn.sites = append(cgn.sites, &callsite{targets: targets}) + params := a.funcParams(cgn.obj) + a.addConstraint(&runtimeSetFinalizerConstraint{ + targets: targets, + x: params, + f: params + 1, + }) +} + +// ---------- func time.startTimer(t *runtimeTimer) ---------- + +// time.StartTimer(t) +type timeStartTimerConstraint struct { + targets nodeid // (indirect) + t nodeid // (ptr) +} + +func (c *timeStartTimerConstraint) ptr() nodeid { return c.t } +func (c *timeStartTimerConstraint) presolve(h *hvn) { + h.markIndirect(onodeid(c.targets), "StartTimer.targets") +} +func (c *timeStartTimerConstraint) renumber(mapping []nodeid) { + c.targets = mapping[c.targets] + c.t = mapping[c.t] +} + +func (c *timeStartTimerConstraint) String() string { + return fmt.Sprintf("time.startTimer(n%d)", c.t) +} + +func (c *timeStartTimerConstraint) solve(a *analysis, delta *nodeset) { + for _, tObj := range delta.AppendTo(a.deltaSpace) { + t := nodeid(tObj) + + // We model startTimer as if it was defined thus: + // func startTimer(t *runtimeTimer) { t.f(t.arg) } + + // We hard-code the field offsets of time.runtimeTimer: + // type runtimeTimer struct { + // 0 __identity__ + // 1 i int32 + // 2 when int64 + // 3 period int64 + // 4 f func(int64, interface{}) + // 5 arg interface{} + // } + f := t + 4 + arg := t + 5 + + // store t.arg to t.f.params[0] + // (offset 1 => skip identity) + a.store(f, arg, 1, 1) + + // Add dynamic call target. + if a.onlineCopy(c.targets, f) { + a.addWork(c.targets) + } + } +} + +func ext۰time۰startTimer(a *analysis, cgn *cgnode) { + // This is the shared contour, used for dynamic calls. + targets := a.addOneNode(tInvalid, "startTimer.targets", nil) + cgn.sites = append(cgn.sites, &callsite{targets: targets}) + params := a.funcParams(cgn.obj) + a.addConstraint(&timeStartTimerConstraint{ + targets: targets, + t: params, + }) +} diff --git a/vendor/golang.org/x/tools/go/pointer/labels.go b/vendor/golang.org/x/tools/go/pointer/labels.go new file mode 100644 index 0000000..cf6ef20 --- /dev/null +++ b/vendor/golang.org/x/tools/go/pointer/labels.go @@ -0,0 +1,152 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package pointer + +import ( + "fmt" + "go/token" + "strings" + + "golang.org/x/tools/go/ssa" + "golang.org/x/tools/go/types" +) + +// A Label is an entity that may be pointed to by a pointer, map, +// channel, 'func', slice or interface. +// +// Labels include: +// - functions +// - globals +// - tagged objects, representing interfaces and reflect.Values +// - arrays created by conversions (e.g. []byte("foo"), []byte(s)) +// - stack- and heap-allocated variables (including composite literals) +// - channels, maps and arrays created by make() +// - intrinsic or reflective operations that allocate (e.g. append, reflect.New) +// - intrinsic objects, e.g. the initial array behind os.Args. +// - and their subelements, e.g. "alloc.y[*].z" +// +// Labels are so varied that they defy good generalizations; +// some have no value, no callgraph node, or no position. +// Many objects have types that are inexpressible in Go: +// maps, channels, functions, tagged objects. +// +// At most one of Value() or ReflectType() may return non-nil. +// +type Label struct { + obj *object // the addressable memory location containing this label + subelement *fieldInfo // subelement path within obj, e.g. ".a.b[*].c" +} + +// Value returns the ssa.Value that allocated this label's object, if any. +func (l Label) Value() ssa.Value { + val, _ := l.obj.data.(ssa.Value) + return val +} + +// ReflectType returns the type represented by this label if it is an +// reflect.rtype instance object or *reflect.rtype-tagged object. +// +func (l Label) ReflectType() types.Type { + rtype, _ := l.obj.data.(types.Type) + return rtype +} + +// Path returns the path to the subelement of the object containing +// this label. For example, ".x[*].y". +// +func (l Label) Path() string { + return l.subelement.path() +} + +// Pos returns the position of this label, if known, zero otherwise. +func (l Label) Pos() token.Pos { + switch data := l.obj.data.(type) { + case ssa.Value: + return data.Pos() + case types.Type: + if nt, ok := deref(data).(*types.Named); ok { + return nt.Obj().Pos() + } + } + if cgn := l.obj.cgn; cgn != nil { + return cgn.fn.Pos() + } + return token.NoPos +} + +// String returns the printed form of this label. +// +// Examples: Object type: +// x (a variable) +// (sync.Mutex).Lock (a function) +// convert (array created by conversion) +// makemap (map allocated via make) +// makechan (channel allocated via make) +// makeinterface (tagged object allocated by makeinterface) +// (allocation in instrinsic) +// sync.Mutex (a reflect.rtype instance) +// (an intrinsic object) +// +// Labels within compound objects have subelement paths: +// x.y[*].z (a struct variable, x) +// append.y[*].z (array allocated by append) +// makeslice.y[*].z (array allocated via make) +// +// TODO(adonovan): expose func LabelString(*types.Package, Label). +// +func (l Label) String() string { + var s string + switch v := l.obj.data.(type) { + case types.Type: + return v.String() + + case string: + s = v // an intrinsic object (e.g. os.Args[*]) + + case nil: + if l.obj.cgn != nil { + // allocation by intrinsic or reflective operation + s = fmt.Sprintf("", l.obj.cgn.fn) + } else { + s = "" // should be unreachable + } + + case *ssa.Function: + s = v.String() + + case *ssa.Global: + s = v.String() + + case *ssa.Const: + s = v.Name() + + case *ssa.Alloc: + s = v.Comment + if s == "" { + s = "alloc" + } + + case *ssa.Call: + // Currently only calls to append can allocate objects. + if v.Call.Value.(*ssa.Builtin).Object().Name() != "append" { + panic("unhandled *ssa.Call label: " + v.Name()) + } + s = "append" + + case *ssa.MakeMap, *ssa.MakeChan, *ssa.MakeSlice, *ssa.Convert: + s = strings.ToLower(strings.TrimPrefix(fmt.Sprintf("%T", v), "*ssa.")) + + case *ssa.MakeInterface: + // MakeInterface is usually implicit in Go source (so + // Pos()==0), and tagged objects may be allocated + // synthetically (so no *MakeInterface data). + s = "makeinterface:" + v.X.Type().String() + + default: + panic(fmt.Sprintf("unhandled object data type: %T", v)) + } + + return s + l.subelement.path() +} diff --git a/vendor/golang.org/x/tools/go/pointer/opt.go b/vendor/golang.org/x/tools/go/pointer/opt.go new file mode 100644 index 0000000..2620cc0 --- /dev/null +++ b/vendor/golang.org/x/tools/go/pointer/opt.go @@ -0,0 +1,125 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package pointer + +// This file implements renumbering, a pre-solver optimization to +// improve the efficiency of the solver's points-to set representation. +// +// TODO(adonovan): rename file "renumber.go" + +import "fmt" + +// renumber permutes a.nodes so that all nodes within an addressable +// object appear before all non-addressable nodes, maintaining the +// order of nodes within the same object (as required by offsetAddr). +// +// renumber must update every nodeid in the analysis (constraints, +// Pointers, callgraph, etc) to reflect the new ordering. +// +// This is an optimisation to increase the locality and efficiency of +// sparse representations of points-to sets. (Typically only about +// 20% of nodes are within an object.) +// +// NB: nodes added during solving (e.g. for reflection, SetFinalizer) +// will be appended to the end. +// +// Renumbering makes the PTA log inscrutable. To aid debugging, later +// phases (e.g. HVN) must not rely on it having occurred. +// +func (a *analysis) renumber() { + if a.log != nil { + fmt.Fprintf(a.log, "\n\n==== Renumbering\n\n") + } + + N := nodeid(len(a.nodes)) + newNodes := make([]*node, N, N) + renumbering := make([]nodeid, N, N) // maps old to new + + var i, j nodeid + + // The zero node is special. + newNodes[j] = a.nodes[i] + renumbering[i] = j + i++ + j++ + + // Pass 1: object nodes. + for i < N { + obj := a.nodes[i].obj + if obj == nil { + i++ + continue + } + + end := i + nodeid(obj.size) + for i < end { + newNodes[j] = a.nodes[i] + renumbering[i] = j + i++ + j++ + } + } + nobj := j + + // Pass 2: non-object nodes. + for i = 1; i < N; { + obj := a.nodes[i].obj + if obj != nil { + i += nodeid(obj.size) + continue + } + + newNodes[j] = a.nodes[i] + renumbering[i] = j + i++ + j++ + } + + if j != N { + panic(fmt.Sprintf("internal error: j=%d, N=%d", j, N)) + } + + // Log the remapping table. + if a.log != nil { + fmt.Fprintf(a.log, "Renumbering nodes to improve density:\n") + fmt.Fprintf(a.log, "(%d object nodes of %d total)\n", nobj, N) + for old, new := range renumbering { + fmt.Fprintf(a.log, "\tn%d -> n%d\n", old, new) + } + } + + // Now renumber all existing nodeids to use the new node permutation. + // It is critical that all reachable nodeids are accounted for! + + // Renumber nodeids in queried Pointers. + for v, ptr := range a.result.Queries { + ptr.n = renumbering[ptr.n] + a.result.Queries[v] = ptr + } + for v, ptr := range a.result.IndirectQueries { + ptr.n = renumbering[ptr.n] + a.result.IndirectQueries[v] = ptr + } + + // Renumber nodeids in global objects. + for v, id := range a.globalobj { + a.globalobj[v] = renumbering[id] + } + + // Renumber nodeids in constraints. + for _, c := range a.constraints { + c.renumber(renumbering) + } + + // Renumber nodeids in the call graph. + for _, cgn := range a.cgnodes { + cgn.obj = renumbering[cgn.obj] + for _, site := range cgn.sites { + site.targets = renumbering[site.targets] + } + } + + a.nodes = newNodes +} diff --git a/vendor/golang.org/x/tools/go/pointer/print.go b/vendor/golang.org/x/tools/go/pointer/print.go new file mode 100644 index 0000000..4f2f4c7 --- /dev/null +++ b/vendor/golang.org/x/tools/go/pointer/print.go @@ -0,0 +1,43 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package pointer + +import "fmt" + +func (c *addrConstraint) String() string { + return fmt.Sprintf("addr n%d <- {&n%d}", c.dst, c.src) +} + +func (c *copyConstraint) String() string { + return fmt.Sprintf("copy n%d <- n%d", c.dst, c.src) +} + +func (c *loadConstraint) String() string { + return fmt.Sprintf("load n%d <- n%d[%d]", c.dst, c.src, c.offset) +} + +func (c *storeConstraint) String() string { + return fmt.Sprintf("store n%d[%d] <- n%d", c.dst, c.offset, c.src) +} + +func (c *offsetAddrConstraint) String() string { + return fmt.Sprintf("offsetAddr n%d <- n%d.#%d", c.dst, c.src, c.offset) +} + +func (c *typeFilterConstraint) String() string { + return fmt.Sprintf("typeFilter n%d <- n%d.(%s)", c.dst, c.src, c.typ) +} + +func (c *untagConstraint) String() string { + return fmt.Sprintf("untag n%d <- n%d.(%s)", c.dst, c.src, c.typ) +} + +func (c *invokeConstraint) String() string { + return fmt.Sprintf("invoke n%d.%s(n%d ...)", c.iface, c.method.Name(), c.params) +} + +func (n nodeid) String() string { + return fmt.Sprintf("n%d", n) +} diff --git a/vendor/golang.org/x/tools/go/pointer/reflect.go b/vendor/golang.org/x/tools/go/pointer/reflect.go new file mode 100644 index 0000000..466995c --- /dev/null +++ b/vendor/golang.org/x/tools/go/pointer/reflect.go @@ -0,0 +1,1971 @@ +package pointer + +// This file implements the generation and resolution rules for +// constraints arising from the use of reflection in the target +// program. See doc.go for explanation of the representation. +// +// For consistency, the names of all parameters match those of the +// actual functions in the "reflect" package. +// +// To avoid proliferation of equivalent labels, intrinsics should +// memoize as much as possible, like TypeOf and Zero do for their +// tagged objects. +// +// TODO(adonovan): this file is rather subtle. Explain how we derive +// the implementation of each reflect operator from its spec, +// including the subtleties of reflect.flag{Addr,RO,Indir}. +// [Hint: our implementation is as if reflect.flagIndir was always +// true, i.e. reflect.Values are pointers to tagged objects, there is +// no inline allocation optimization; and indirect tagged objects (not +// yet implemented) correspond to reflect.Values with +// reflect.flagAddr.] +// A picture would help too. +// +// TODO(adonovan): try factoring up the common parts of the majority of +// these constraints that are single input, single output. + +import ( + "fmt" + "reflect" + + "golang.org/x/tools/go/exact" + "golang.org/x/tools/go/ssa" + "golang.org/x/tools/go/types" +) + +func init() { + for name, fn := range map[string]intrinsic{ + // reflect.Value methods. + "(reflect.Value).Addr": ext۰reflect۰Value۰Addr, + "(reflect.Value).Bool": ext۰NoEffect, + "(reflect.Value).Bytes": ext۰reflect۰Value۰Bytes, + "(reflect.Value).Call": ext۰reflect۰Value۰Call, + "(reflect.Value).CallSlice": ext۰reflect۰Value۰CallSlice, + "(reflect.Value).CanAddr": ext۰NoEffect, + "(reflect.Value).CanInterface": ext۰NoEffect, + "(reflect.Value).CanSet": ext۰NoEffect, + "(reflect.Value).Cap": ext۰NoEffect, + "(reflect.Value).Close": ext۰NoEffect, + "(reflect.Value).Complex": ext۰NoEffect, + "(reflect.Value).Convert": ext۰reflect۰Value۰Convert, + "(reflect.Value).Elem": ext۰reflect۰Value۰Elem, + "(reflect.Value).Field": ext۰reflect۰Value۰Field, + "(reflect.Value).FieldByIndex": ext۰reflect۰Value۰FieldByIndex, + "(reflect.Value).FieldByName": ext۰reflect۰Value۰FieldByName, + "(reflect.Value).FieldByNameFunc": ext۰reflect۰Value۰FieldByNameFunc, + "(reflect.Value).Float": ext۰NoEffect, + "(reflect.Value).Index": ext۰reflect۰Value۰Index, + "(reflect.Value).Int": ext۰NoEffect, + "(reflect.Value).Interface": ext۰reflect۰Value۰Interface, + "(reflect.Value).InterfaceData": ext۰NoEffect, + "(reflect.Value).IsNil": ext۰NoEffect, + "(reflect.Value).IsValid": ext۰NoEffect, + "(reflect.Value).Kind": ext۰NoEffect, + "(reflect.Value).Len": ext۰NoEffect, + "(reflect.Value).MapIndex": ext۰reflect۰Value۰MapIndex, + "(reflect.Value).MapKeys": ext۰reflect۰Value۰MapKeys, + "(reflect.Value).Method": ext۰reflect۰Value۰Method, + "(reflect.Value).MethodByName": ext۰reflect۰Value۰MethodByName, + "(reflect.Value).NumField": ext۰NoEffect, + "(reflect.Value).NumMethod": ext۰NoEffect, + "(reflect.Value).OverflowComplex": ext۰NoEffect, + "(reflect.Value).OverflowFloat": ext۰NoEffect, + "(reflect.Value).OverflowInt": ext۰NoEffect, + "(reflect.Value).OverflowUint": ext۰NoEffect, + "(reflect.Value).Pointer": ext۰NoEffect, + "(reflect.Value).Recv": ext۰reflect۰Value۰Recv, + "(reflect.Value).Send": ext۰reflect۰Value۰Send, + "(reflect.Value).Set": ext۰reflect۰Value۰Set, + "(reflect.Value).SetBool": ext۰NoEffect, + "(reflect.Value).SetBytes": ext۰reflect۰Value۰SetBytes, + "(reflect.Value).SetComplex": ext۰NoEffect, + "(reflect.Value).SetFloat": ext۰NoEffect, + "(reflect.Value).SetInt": ext۰NoEffect, + "(reflect.Value).SetLen": ext۰NoEffect, + "(reflect.Value).SetMapIndex": ext۰reflect۰Value۰SetMapIndex, + "(reflect.Value).SetPointer": ext۰reflect۰Value۰SetPointer, + "(reflect.Value).SetString": ext۰NoEffect, + "(reflect.Value).SetUint": ext۰NoEffect, + "(reflect.Value).Slice": ext۰reflect۰Value۰Slice, + "(reflect.Value).String": ext۰NoEffect, + "(reflect.Value).TryRecv": ext۰reflect۰Value۰Recv, + "(reflect.Value).TrySend": ext۰reflect۰Value۰Send, + "(reflect.Value).Type": ext۰NoEffect, + "(reflect.Value).Uint": ext۰NoEffect, + "(reflect.Value).UnsafeAddr": ext۰NoEffect, + + // Standalone reflect.* functions. + "reflect.Append": ext۰reflect۰Append, + "reflect.AppendSlice": ext۰reflect۰AppendSlice, + "reflect.Copy": ext۰reflect۰Copy, + "reflect.ChanOf": ext۰reflect۰ChanOf, + "reflect.DeepEqual": ext۰NoEffect, + "reflect.Indirect": ext۰reflect۰Indirect, + "reflect.MakeChan": ext۰reflect۰MakeChan, + "reflect.MakeFunc": ext۰reflect۰MakeFunc, + "reflect.MakeMap": ext۰reflect۰MakeMap, + "reflect.MakeSlice": ext۰reflect۰MakeSlice, + "reflect.MapOf": ext۰reflect۰MapOf, + "reflect.New": ext۰reflect۰New, + "reflect.NewAt": ext۰reflect۰NewAt, + "reflect.PtrTo": ext۰reflect۰PtrTo, + "reflect.Select": ext۰reflect۰Select, + "reflect.SliceOf": ext۰reflect۰SliceOf, + "reflect.TypeOf": ext۰reflect۰TypeOf, + "reflect.ValueOf": ext۰reflect۰ValueOf, + "reflect.Zero": ext۰reflect۰Zero, + "reflect.init": ext۰NoEffect, + + // *reflect.rtype methods + "(*reflect.rtype).Align": ext۰NoEffect, + "(*reflect.rtype).AssignableTo": ext۰NoEffect, + "(*reflect.rtype).Bits": ext۰NoEffect, + "(*reflect.rtype).ChanDir": ext۰NoEffect, + "(*reflect.rtype).ConvertibleTo": ext۰NoEffect, + "(*reflect.rtype).Elem": ext۰reflect۰rtype۰Elem, + "(*reflect.rtype).Field": ext۰reflect۰rtype۰Field, + "(*reflect.rtype).FieldAlign": ext۰NoEffect, + "(*reflect.rtype).FieldByIndex": ext۰reflect۰rtype۰FieldByIndex, + "(*reflect.rtype).FieldByName": ext۰reflect۰rtype۰FieldByName, + "(*reflect.rtype).FieldByNameFunc": ext۰reflect۰rtype۰FieldByNameFunc, + "(*reflect.rtype).Implements": ext۰NoEffect, + "(*reflect.rtype).In": ext۰reflect۰rtype۰In, + "(*reflect.rtype).IsVariadic": ext۰NoEffect, + "(*reflect.rtype).Key": ext۰reflect۰rtype۰Key, + "(*reflect.rtype).Kind": ext۰NoEffect, + "(*reflect.rtype).Len": ext۰NoEffect, + "(*reflect.rtype).Method": ext۰reflect۰rtype۰Method, + "(*reflect.rtype).MethodByName": ext۰reflect۰rtype۰MethodByName, + "(*reflect.rtype).Name": ext۰NoEffect, + "(*reflect.rtype).NumField": ext۰NoEffect, + "(*reflect.rtype).NumIn": ext۰NoEffect, + "(*reflect.rtype).NumMethod": ext۰NoEffect, + "(*reflect.rtype).NumOut": ext۰NoEffect, + "(*reflect.rtype).Out": ext۰reflect۰rtype۰Out, + "(*reflect.rtype).PkgPath": ext۰NoEffect, + "(*reflect.rtype).Size": ext۰NoEffect, + "(*reflect.rtype).String": ext۰NoEffect, + } { + intrinsicsByName[name] = fn + } +} + +// -------------------- (reflect.Value) -------------------- + +func ext۰reflect۰Value۰Addr(a *analysis, cgn *cgnode) {} // TODO(adonovan) + +// ---------- func (Value).Bytes() Value ---------- + +// result = v.Bytes() +type rVBytesConstraint struct { + v nodeid // (ptr) + result nodeid // (indirect) +} + +func (c *rVBytesConstraint) ptr() nodeid { return c.v } +func (c *rVBytesConstraint) presolve(h *hvn) { + h.markIndirect(onodeid(c.result), "rVBytes.result") +} +func (c *rVBytesConstraint) renumber(mapping []nodeid) { + c.v = mapping[c.v] + c.result = mapping[c.result] +} + +func (c *rVBytesConstraint) String() string { + return fmt.Sprintf("n%d = reflect n%d.Bytes()", c.result, c.v) +} + +func (c *rVBytesConstraint) solve(a *analysis, delta *nodeset) { + changed := false + for _, x := range delta.AppendTo(a.deltaSpace) { + vObj := nodeid(x) + tDyn, slice, indirect := a.taggedValue(vObj) + if indirect { + // TODO(adonovan): we'll need to implement this + // when we start creating indirect tagged objects. + panic("indirect tagged object") + } + + tSlice, ok := tDyn.Underlying().(*types.Slice) + if ok && types.Identical(tSlice.Elem(), types.Typ[types.Uint8]) { + if a.onlineCopy(c.result, slice) { + changed = true + } + } + } + if changed { + a.addWork(c.result) + } +} + +func ext۰reflect۰Value۰Bytes(a *analysis, cgn *cgnode) { + a.addConstraint(&rVBytesConstraint{ + v: a.funcParams(cgn.obj), + result: a.funcResults(cgn.obj), + }) +} + +// ---------- func (Value).Call(in []Value) []Value ---------- + +// result = v.Call(in) +type rVCallConstraint struct { + cgn *cgnode + targets nodeid // (indirect) + v nodeid // (ptr) + arg nodeid // = in[*] + result nodeid // (indirect) + dotdotdot bool // interpret last arg as a "..." slice +} + +func (c *rVCallConstraint) ptr() nodeid { return c.v } +func (c *rVCallConstraint) presolve(h *hvn) { + h.markIndirect(onodeid(c.targets), "rVCall.targets") + h.markIndirect(onodeid(c.result), "rVCall.result") +} +func (c *rVCallConstraint) renumber(mapping []nodeid) { + c.targets = mapping[c.targets] + c.v = mapping[c.v] + c.arg = mapping[c.arg] + c.result = mapping[c.result] +} + +func (c *rVCallConstraint) String() string { + return fmt.Sprintf("n%d = reflect n%d.Call(n%d)", c.result, c.v, c.arg) +} + +func (c *rVCallConstraint) solve(a *analysis, delta *nodeset) { + if c.targets == 0 { + panic("no targets") + } + + changed := false + for _, x := range delta.AppendTo(a.deltaSpace) { + vObj := nodeid(x) + tDyn, fn, indirect := a.taggedValue(vObj) + if indirect { + // TODO(adonovan): we'll need to implement this + // when we start creating indirect tagged objects. + panic("indirect tagged object") + } + + tSig, ok := tDyn.Underlying().(*types.Signature) + if !ok { + continue // not a function + } + if tSig.Recv() != nil { + panic(tSig) // TODO(adonovan): rethink when we implement Method() + } + + // Add dynamic call target. + if a.onlineCopy(c.targets, fn) { + a.addWork(c.targets) + // TODO(adonovan): is 'else continue' a sound optimisation here? + } + + // Allocate a P/R block. + tParams := tSig.Params() + tResults := tSig.Results() + params := a.addNodes(tParams, "rVCall.params") + results := a.addNodes(tResults, "rVCall.results") + + // Make a dynamic call to 'fn'. + a.store(fn, params, 1, a.sizeof(tParams)) + a.load(results, fn, 1+a.sizeof(tParams), a.sizeof(tResults)) + + // Populate P by type-asserting each actual arg (all merged in c.arg). + for i, n := 0, tParams.Len(); i < n; i++ { + T := tParams.At(i).Type() + a.typeAssert(T, params, c.arg, false) + params += nodeid(a.sizeof(T)) + } + + // Use R by tagging and copying each actual result to c.result. + for i, n := 0, tResults.Len(); i < n; i++ { + T := tResults.At(i).Type() + // Convert from an arbitrary type to a reflect.Value + // (like MakeInterface followed by reflect.ValueOf). + if isInterface(T) { + // (don't tag) + if a.onlineCopy(c.result, results) { + changed = true + } + } else { + obj := a.makeTagged(T, c.cgn, nil) + a.onlineCopyN(obj+1, results, a.sizeof(T)) + if a.addLabel(c.result, obj) { // (true) + changed = true + } + } + results += nodeid(a.sizeof(T)) + } + } + if changed { + a.addWork(c.result) + } +} + +// Common code for direct (inlined) and indirect calls to (reflect.Value).Call. +func reflectCallImpl(a *analysis, cgn *cgnode, site *callsite, recv, arg nodeid, dotdotdot bool) nodeid { + // Allocate []reflect.Value array for the result. + ret := a.nextNode() + a.addNodes(types.NewArray(a.reflectValueObj.Type(), 1), "rVCall.ret") + a.endObject(ret, cgn, nil) + + // pts(targets) will be the set of possible call targets. + site.targets = a.addOneNode(tInvalid, "rvCall.targets", nil) + + // All arguments are merged since they arrive in a slice. + argelts := a.addOneNode(a.reflectValueObj.Type(), "rVCall.args", nil) + a.load(argelts, arg, 1, 1) // slice elements + + a.addConstraint(&rVCallConstraint{ + cgn: cgn, + targets: site.targets, + v: recv, + arg: argelts, + result: ret + 1, // results go into elements of ret + dotdotdot: dotdotdot, + }) + return ret +} + +func reflectCall(a *analysis, cgn *cgnode, dotdotdot bool) { + // This is the shared contour implementation of (reflect.Value).Call + // and CallSlice, as used by indirect calls (rare). + // Direct calls are inlined in gen.go, eliding the + // intermediate cgnode for Call. + site := new(callsite) + cgn.sites = append(cgn.sites, site) + recv := a.funcParams(cgn.obj) + arg := recv + 1 + ret := reflectCallImpl(a, cgn, site, recv, arg, dotdotdot) + a.addressOf(cgn.fn.Signature.Results().At(0).Type(), a.funcResults(cgn.obj), ret) +} + +func ext۰reflect۰Value۰Call(a *analysis, cgn *cgnode) { + reflectCall(a, cgn, false) +} + +func ext۰reflect۰Value۰CallSlice(a *analysis, cgn *cgnode) { + // TODO(adonovan): implement. Also, inline direct calls in gen.go too. + if false { + reflectCall(a, cgn, true) + } +} + +func ext۰reflect۰Value۰Convert(a *analysis, cgn *cgnode) {} // TODO(adonovan) + +// ---------- func (Value).Elem() Value ---------- + +// result = v.Elem() +type rVElemConstraint struct { + cgn *cgnode + v nodeid // (ptr) + result nodeid // (indirect) +} + +func (c *rVElemConstraint) ptr() nodeid { return c.v } +func (c *rVElemConstraint) presolve(h *hvn) { + h.markIndirect(onodeid(c.result), "rVElem.result") +} +func (c *rVElemConstraint) renumber(mapping []nodeid) { + c.v = mapping[c.v] + c.result = mapping[c.result] +} + +func (c *rVElemConstraint) String() string { + return fmt.Sprintf("n%d = reflect n%d.Elem()", c.result, c.v) +} + +func (c *rVElemConstraint) solve(a *analysis, delta *nodeset) { + changed := false + for _, x := range delta.AppendTo(a.deltaSpace) { + vObj := nodeid(x) + tDyn, payload, indirect := a.taggedValue(vObj) + if indirect { + // TODO(adonovan): we'll need to implement this + // when we start creating indirect tagged objects. + panic("indirect tagged object") + } + + switch t := tDyn.Underlying().(type) { + case *types.Interface: + if a.onlineCopy(c.result, payload) { + changed = true + } + + case *types.Pointer: + obj := a.makeTagged(t.Elem(), c.cgn, nil) + a.load(obj+1, payload, 0, a.sizeof(t.Elem())) + if a.addLabel(c.result, obj) { + changed = true + } + } + } + if changed { + a.addWork(c.result) + } +} + +func ext۰reflect۰Value۰Elem(a *analysis, cgn *cgnode) { + a.addConstraint(&rVElemConstraint{ + cgn: cgn, + v: a.funcParams(cgn.obj), + result: a.funcResults(cgn.obj), + }) +} + +func ext۰reflect۰Value۰Field(a *analysis, cgn *cgnode) {} // TODO(adonovan) +func ext۰reflect۰Value۰FieldByIndex(a *analysis, cgn *cgnode) {} // TODO(adonovan) +func ext۰reflect۰Value۰FieldByName(a *analysis, cgn *cgnode) {} // TODO(adonovan) +func ext۰reflect۰Value۰FieldByNameFunc(a *analysis, cgn *cgnode) {} // TODO(adonovan) + +// ---------- func (Value).Index() Value ---------- + +// result = v.Index() +type rVIndexConstraint struct { + cgn *cgnode + v nodeid // (ptr) + result nodeid // (indirect) +} + +func (c *rVIndexConstraint) ptr() nodeid { return c.v } +func (c *rVIndexConstraint) presolve(h *hvn) { + h.markIndirect(onodeid(c.result), "rVIndex.result") +} +func (c *rVIndexConstraint) renumber(mapping []nodeid) { + c.v = mapping[c.v] + c.result = mapping[c.result] +} + +func (c *rVIndexConstraint) String() string { + return fmt.Sprintf("n%d = reflect n%d.Index()", c.result, c.v) +} + +func (c *rVIndexConstraint) solve(a *analysis, delta *nodeset) { + changed := false + for _, x := range delta.AppendTo(a.deltaSpace) { + vObj := nodeid(x) + tDyn, payload, indirect := a.taggedValue(vObj) + if indirect { + // TODO(adonovan): we'll need to implement this + // when we start creating indirect tagged objects. + panic("indirect tagged object") + } + + var res nodeid + switch t := tDyn.Underlying().(type) { + case *types.Array: + res = a.makeTagged(t.Elem(), c.cgn, nil) + a.onlineCopyN(res+1, payload+1, a.sizeof(t.Elem())) + + case *types.Slice: + res = a.makeTagged(t.Elem(), c.cgn, nil) + a.load(res+1, payload, 1, a.sizeof(t.Elem())) + + case *types.Basic: + if t.Kind() == types.String { + res = a.makeTagged(types.Typ[types.Rune], c.cgn, nil) + } + } + if res != 0 && a.addLabel(c.result, res) { + changed = true + } + } + if changed { + a.addWork(c.result) + } +} + +func ext۰reflect۰Value۰Index(a *analysis, cgn *cgnode) { + a.addConstraint(&rVIndexConstraint{ + cgn: cgn, + v: a.funcParams(cgn.obj), + result: a.funcResults(cgn.obj), + }) +} + +// ---------- func (Value).Interface() Value ---------- + +// result = v.Interface() +type rVInterfaceConstraint struct { + v nodeid // (ptr) + result nodeid // (indirect) +} + +func (c *rVInterfaceConstraint) ptr() nodeid { return c.v } +func (c *rVInterfaceConstraint) presolve(h *hvn) { + h.markIndirect(onodeid(c.result), "rVInterface.result") +} +func (c *rVInterfaceConstraint) renumber(mapping []nodeid) { + c.v = mapping[c.v] + c.result = mapping[c.result] +} + +func (c *rVInterfaceConstraint) String() string { + return fmt.Sprintf("n%d = reflect n%d.Interface()", c.result, c.v) +} + +func (c *rVInterfaceConstraint) solve(a *analysis, delta *nodeset) { + changed := false + for _, x := range delta.AppendTo(a.deltaSpace) { + vObj := nodeid(x) + tDyn, payload, indirect := a.taggedValue(vObj) + if indirect { + // TODO(adonovan): we'll need to implement this + // when we start creating indirect tagged objects. + panic("indirect tagged object") + } + + if isInterface(tDyn) { + if a.onlineCopy(c.result, payload) { + a.addWork(c.result) + } + } else { + if a.addLabel(c.result, vObj) { + changed = true + } + } + } + if changed { + a.addWork(c.result) + } +} + +func ext۰reflect۰Value۰Interface(a *analysis, cgn *cgnode) { + a.addConstraint(&rVInterfaceConstraint{ + v: a.funcParams(cgn.obj), + result: a.funcResults(cgn.obj), + }) +} + +// ---------- func (Value).MapIndex(Value) Value ---------- + +// result = v.MapIndex(_) +type rVMapIndexConstraint struct { + cgn *cgnode + v nodeid // (ptr) + result nodeid // (indirect) +} + +func (c *rVMapIndexConstraint) ptr() nodeid { return c.v } +func (c *rVMapIndexConstraint) presolve(h *hvn) { + h.markIndirect(onodeid(c.result), "rVMapIndex.result") +} +func (c *rVMapIndexConstraint) renumber(mapping []nodeid) { + c.v = mapping[c.v] + c.result = mapping[c.result] +} + +func (c *rVMapIndexConstraint) String() string { + return fmt.Sprintf("n%d = reflect n%d.MapIndex(_)", c.result, c.v) +} + +func (c *rVMapIndexConstraint) solve(a *analysis, delta *nodeset) { + changed := false + for _, x := range delta.AppendTo(a.deltaSpace) { + vObj := nodeid(x) + tDyn, m, indirect := a.taggedValue(vObj) + tMap, _ := tDyn.Underlying().(*types.Map) + if tMap == nil { + continue // not a map + } + if indirect { + // TODO(adonovan): we'll need to implement this + // when we start creating indirect tagged objects. + panic("indirect tagged object") + } + + obj := a.makeTagged(tMap.Elem(), c.cgn, nil) + a.load(obj+1, m, a.sizeof(tMap.Key()), a.sizeof(tMap.Elem())) + if a.addLabel(c.result, obj) { + changed = true + } + } + if changed { + a.addWork(c.result) + } +} + +func ext۰reflect۰Value۰MapIndex(a *analysis, cgn *cgnode) { + a.addConstraint(&rVMapIndexConstraint{ + cgn: cgn, + v: a.funcParams(cgn.obj), + result: a.funcResults(cgn.obj), + }) +} + +// ---------- func (Value).MapKeys() []Value ---------- + +// result = v.MapKeys() +type rVMapKeysConstraint struct { + cgn *cgnode + v nodeid // (ptr) + result nodeid // (indirect) +} + +func (c *rVMapKeysConstraint) ptr() nodeid { return c.v } +func (c *rVMapKeysConstraint) presolve(h *hvn) { + h.markIndirect(onodeid(c.result), "rVMapKeys.result") +} +func (c *rVMapKeysConstraint) renumber(mapping []nodeid) { + c.v = mapping[c.v] + c.result = mapping[c.result] +} + +func (c *rVMapKeysConstraint) String() string { + return fmt.Sprintf("n%d = reflect n%d.MapKeys()", c.result, c.v) +} + +func (c *rVMapKeysConstraint) solve(a *analysis, delta *nodeset) { + changed := false + for _, x := range delta.AppendTo(a.deltaSpace) { + vObj := nodeid(x) + tDyn, m, indirect := a.taggedValue(vObj) + tMap, _ := tDyn.Underlying().(*types.Map) + if tMap == nil { + continue // not a map + } + if indirect { + // TODO(adonovan): we'll need to implement this + // when we start creating indirect tagged objects. + panic("indirect tagged object") + } + + kObj := a.makeTagged(tMap.Key(), c.cgn, nil) + a.load(kObj+1, m, 0, a.sizeof(tMap.Key())) + if a.addLabel(c.result, kObj) { + changed = true + } + } + if changed { + a.addWork(c.result) + } +} + +func ext۰reflect۰Value۰MapKeys(a *analysis, cgn *cgnode) { + // Allocate an array for the result. + obj := a.nextNode() + T := types.NewSlice(a.reflectValueObj.Type()) + a.addNodes(sliceToArray(T), "reflect.MapKeys result") + a.endObject(obj, cgn, nil) + a.addressOf(T, a.funcResults(cgn.obj), obj) + + a.addConstraint(&rVMapKeysConstraint{ + cgn: cgn, + v: a.funcParams(cgn.obj), + result: obj + 1, // result is stored in array elems + }) +} + +func ext۰reflect۰Value۰Method(a *analysis, cgn *cgnode) {} // TODO(adonovan) +func ext۰reflect۰Value۰MethodByName(a *analysis, cgn *cgnode) {} // TODO(adonovan) + +// ---------- func (Value).Recv(Value) Value ---------- + +// result, _ = v.Recv() +type rVRecvConstraint struct { + cgn *cgnode + v nodeid // (ptr) + result nodeid // (indirect) +} + +func (c *rVRecvConstraint) ptr() nodeid { return c.v } +func (c *rVRecvConstraint) presolve(h *hvn) { + h.markIndirect(onodeid(c.result), "rVRecv.result") +} +func (c *rVRecvConstraint) renumber(mapping []nodeid) { + c.v = mapping[c.v] + c.result = mapping[c.result] +} + +func (c *rVRecvConstraint) String() string { + return fmt.Sprintf("n%d = reflect n%d.Recv()", c.result, c.v) +} + +func (c *rVRecvConstraint) solve(a *analysis, delta *nodeset) { + changed := false + for _, x := range delta.AppendTo(a.deltaSpace) { + vObj := nodeid(x) + tDyn, ch, indirect := a.taggedValue(vObj) + tChan, _ := tDyn.Underlying().(*types.Chan) + if tChan == nil { + continue // not a channel + } + if indirect { + // TODO(adonovan): we'll need to implement this + // when we start creating indirect tagged objects. + panic("indirect tagged object") + } + + tElem := tChan.Elem() + elemObj := a.makeTagged(tElem, c.cgn, nil) + a.load(elemObj+1, ch, 0, a.sizeof(tElem)) + if a.addLabel(c.result, elemObj) { + changed = true + } + } + if changed { + a.addWork(c.result) + } +} + +func ext۰reflect۰Value۰Recv(a *analysis, cgn *cgnode) { + a.addConstraint(&rVRecvConstraint{ + cgn: cgn, + v: a.funcParams(cgn.obj), + result: a.funcResults(cgn.obj), + }) +} + +// ---------- func (Value).Send(Value) ---------- + +// v.Send(x) +type rVSendConstraint struct { + cgn *cgnode + v nodeid // (ptr) + x nodeid +} + +func (c *rVSendConstraint) ptr() nodeid { return c.v } +func (c *rVSendConstraint) presolve(*hvn) {} +func (c *rVSendConstraint) renumber(mapping []nodeid) { + c.v = mapping[c.v] + c.x = mapping[c.x] +} + +func (c *rVSendConstraint) String() string { + return fmt.Sprintf("reflect n%d.Send(n%d)", c.v, c.x) +} + +func (c *rVSendConstraint) solve(a *analysis, delta *nodeset) { + for _, x := range delta.AppendTo(a.deltaSpace) { + vObj := nodeid(x) + tDyn, ch, indirect := a.taggedValue(vObj) + tChan, _ := tDyn.Underlying().(*types.Chan) + if tChan == nil { + continue // not a channel + } + if indirect { + // TODO(adonovan): we'll need to implement this + // when we start creating indirect tagged objects. + panic("indirect tagged object") + } + + // Extract x's payload to xtmp, then store to channel. + tElem := tChan.Elem() + xtmp := a.addNodes(tElem, "Send.xtmp") + a.typeAssert(tElem, xtmp, c.x, false) + a.store(ch, xtmp, 0, a.sizeof(tElem)) + } +} + +func ext۰reflect۰Value۰Send(a *analysis, cgn *cgnode) { + params := a.funcParams(cgn.obj) + a.addConstraint(&rVSendConstraint{ + cgn: cgn, + v: params, + x: params + 1, + }) +} + +func ext۰reflect۰Value۰Set(a *analysis, cgn *cgnode) {} // TODO(adonovan) + +// ---------- func (Value).SetBytes(x []byte) ---------- + +// v.SetBytes(x) +type rVSetBytesConstraint struct { + cgn *cgnode + v nodeid // (ptr) + x nodeid +} + +func (c *rVSetBytesConstraint) ptr() nodeid { return c.v } +func (c *rVSetBytesConstraint) presolve(*hvn) {} +func (c *rVSetBytesConstraint) renumber(mapping []nodeid) { + c.v = mapping[c.v] + c.x = mapping[c.x] +} + +func (c *rVSetBytesConstraint) String() string { + return fmt.Sprintf("reflect n%d.SetBytes(n%d)", c.v, c.x) +} + +func (c *rVSetBytesConstraint) solve(a *analysis, delta *nodeset) { + for _, x := range delta.AppendTo(a.deltaSpace) { + vObj := nodeid(x) + tDyn, slice, indirect := a.taggedValue(vObj) + if indirect { + // TODO(adonovan): we'll need to implement this + // when we start creating indirect tagged objects. + panic("indirect tagged object") + } + + tSlice, ok := tDyn.Underlying().(*types.Slice) + if ok && types.Identical(tSlice.Elem(), types.Typ[types.Uint8]) { + if a.onlineCopy(slice, c.x) { + a.addWork(slice) + } + } + } +} + +func ext۰reflect۰Value۰SetBytes(a *analysis, cgn *cgnode) { + params := a.funcParams(cgn.obj) + a.addConstraint(&rVSetBytesConstraint{ + cgn: cgn, + v: params, + x: params + 1, + }) +} + +// ---------- func (Value).SetMapIndex(k Value, v Value) ---------- + +// v.SetMapIndex(key, val) +type rVSetMapIndexConstraint struct { + cgn *cgnode + v nodeid // (ptr) + key nodeid + val nodeid +} + +func (c *rVSetMapIndexConstraint) ptr() nodeid { return c.v } +func (c *rVSetMapIndexConstraint) presolve(*hvn) {} +func (c *rVSetMapIndexConstraint) renumber(mapping []nodeid) { + c.v = mapping[c.v] + c.key = mapping[c.key] + c.val = mapping[c.val] +} + +func (c *rVSetMapIndexConstraint) String() string { + return fmt.Sprintf("reflect n%d.SetMapIndex(n%d, n%d)", c.v, c.key, c.val) +} + +func (c *rVSetMapIndexConstraint) solve(a *analysis, delta *nodeset) { + for _, x := range delta.AppendTo(a.deltaSpace) { + vObj := nodeid(x) + tDyn, m, indirect := a.taggedValue(vObj) + tMap, _ := tDyn.Underlying().(*types.Map) + if tMap == nil { + continue // not a map + } + if indirect { + // TODO(adonovan): we'll need to implement this + // when we start creating indirect tagged objects. + panic("indirect tagged object") + } + + keysize := a.sizeof(tMap.Key()) + + // Extract key's payload to keytmp, then store to map key. + keytmp := a.addNodes(tMap.Key(), "SetMapIndex.keytmp") + a.typeAssert(tMap.Key(), keytmp, c.key, false) + a.store(m, keytmp, 0, keysize) + + // Extract val's payload to vtmp, then store to map value. + valtmp := a.addNodes(tMap.Elem(), "SetMapIndex.valtmp") + a.typeAssert(tMap.Elem(), valtmp, c.val, false) + a.store(m, valtmp, keysize, a.sizeof(tMap.Elem())) + } +} + +func ext۰reflect۰Value۰SetMapIndex(a *analysis, cgn *cgnode) { + params := a.funcParams(cgn.obj) + a.addConstraint(&rVSetMapIndexConstraint{ + cgn: cgn, + v: params, + key: params + 1, + val: params + 2, + }) +} + +func ext۰reflect۰Value۰SetPointer(a *analysis, cgn *cgnode) {} // TODO(adonovan) + +// ---------- func (Value).Slice(v Value, i, j int) Value ---------- + +// result = v.Slice(_, _) +type rVSliceConstraint struct { + cgn *cgnode + v nodeid // (ptr) + result nodeid // (indirect) +} + +func (c *rVSliceConstraint) ptr() nodeid { return c.v } +func (c *rVSliceConstraint) presolve(h *hvn) { + h.markIndirect(onodeid(c.result), "rVSlice.result") +} +func (c *rVSliceConstraint) renumber(mapping []nodeid) { + c.v = mapping[c.v] + c.result = mapping[c.result] +} + +func (c *rVSliceConstraint) String() string { + return fmt.Sprintf("n%d = reflect n%d.Slice(_, _)", c.result, c.v) +} + +func (c *rVSliceConstraint) solve(a *analysis, delta *nodeset) { + changed := false + for _, x := range delta.AppendTo(a.deltaSpace) { + vObj := nodeid(x) + tDyn, payload, indirect := a.taggedValue(vObj) + if indirect { + // TODO(adonovan): we'll need to implement this + // when we start creating indirect tagged objects. + panic("indirect tagged object") + } + + var res nodeid + switch t := tDyn.Underlying().(type) { + case *types.Pointer: + if tArr, ok := t.Elem().Underlying().(*types.Array); ok { + // pointer to array + res = a.makeTagged(types.NewSlice(tArr.Elem()), c.cgn, nil) + if a.onlineCopy(res+1, payload) { + a.addWork(res + 1) + } + } + + case *types.Array: + // TODO(adonovan): implement addressable + // arrays when we do indirect tagged objects. + + case *types.Slice: + res = vObj + + case *types.Basic: + if t == types.Typ[types.String] { + res = vObj + } + } + + if res != 0 && a.addLabel(c.result, res) { + changed = true + } + } + if changed { + a.addWork(c.result) + } +} + +func ext۰reflect۰Value۰Slice(a *analysis, cgn *cgnode) { + a.addConstraint(&rVSliceConstraint{ + cgn: cgn, + v: a.funcParams(cgn.obj), + result: a.funcResults(cgn.obj), + }) +} + +// -------------------- Standalone reflect functions -------------------- + +func ext۰reflect۰Append(a *analysis, cgn *cgnode) {} // TODO(adonovan) +func ext۰reflect۰AppendSlice(a *analysis, cgn *cgnode) {} // TODO(adonovan) +func ext۰reflect۰Copy(a *analysis, cgn *cgnode) {} // TODO(adonovan) + +// ---------- func ChanOf(ChanDir, Type) Type ---------- + +// result = ChanOf(dir, t) +type reflectChanOfConstraint struct { + cgn *cgnode + t nodeid // (ptr) + result nodeid // (indirect) + dirs []types.ChanDir +} + +func (c *reflectChanOfConstraint) ptr() nodeid { return c.t } +func (c *reflectChanOfConstraint) presolve(h *hvn) { + h.markIndirect(onodeid(c.result), "reflectChanOf.result") +} +func (c *reflectChanOfConstraint) renumber(mapping []nodeid) { + c.t = mapping[c.t] + c.result = mapping[c.result] +} + +func (c *reflectChanOfConstraint) String() string { + return fmt.Sprintf("n%d = reflect.ChanOf(n%d)", c.result, c.t) +} + +func (c *reflectChanOfConstraint) solve(a *analysis, delta *nodeset) { + changed := false + for _, x := range delta.AppendTo(a.deltaSpace) { + tObj := nodeid(x) + T := a.rtypeTaggedValue(tObj) + + if typeTooHigh(T) { + continue + } + + for _, dir := range c.dirs { + if a.addLabel(c.result, a.makeRtype(types.NewChan(dir, T))) { + changed = true + } + } + } + if changed { + a.addWork(c.result) + } +} + +// dirMap maps reflect.ChanDir to the set of channel types generated by ChanOf. +var dirMap = [...][]types.ChanDir{ + 0: {types.SendOnly, types.RecvOnly, types.SendRecv}, // unknown + reflect.RecvDir: {types.RecvOnly}, + reflect.SendDir: {types.SendOnly}, + reflect.BothDir: {types.SendRecv}, +} + +func ext۰reflect۰ChanOf(a *analysis, cgn *cgnode) { + // If we have access to the callsite, + // and the channel argument is a constant (as is usual), + // only generate the requested direction. + var dir reflect.ChanDir // unknown + if site := cgn.callersite; site != nil { + if c, ok := site.instr.Common().Args[0].(*ssa.Const); ok { + v, _ := exact.Int64Val(c.Value) + if 0 <= v && v <= int64(reflect.BothDir) { + dir = reflect.ChanDir(v) + } + } + } + + params := a.funcParams(cgn.obj) + a.addConstraint(&reflectChanOfConstraint{ + cgn: cgn, + t: params + 1, + result: a.funcResults(cgn.obj), + dirs: dirMap[dir], + }) +} + +// ---------- func Indirect(v Value) Value ---------- + +// result = Indirect(v) +type reflectIndirectConstraint struct { + cgn *cgnode + v nodeid // (ptr) + result nodeid // (indirect) +} + +func (c *reflectIndirectConstraint) ptr() nodeid { return c.v } +func (c *reflectIndirectConstraint) presolve(h *hvn) { + h.markIndirect(onodeid(c.result), "reflectIndirect.result") +} +func (c *reflectIndirectConstraint) renumber(mapping []nodeid) { + c.v = mapping[c.v] + c.result = mapping[c.result] +} + +func (c *reflectIndirectConstraint) String() string { + return fmt.Sprintf("n%d = reflect.Indirect(n%d)", c.result, c.v) +} + +func (c *reflectIndirectConstraint) solve(a *analysis, delta *nodeset) { + changed := false + for _, x := range delta.AppendTo(a.deltaSpace) { + vObj := nodeid(x) + tDyn, _, _ := a.taggedValue(vObj) + var res nodeid + if tPtr, ok := tDyn.Underlying().(*types.Pointer); ok { + // load the payload of the pointer's tagged object + // into a new tagged object + res = a.makeTagged(tPtr.Elem(), c.cgn, nil) + a.load(res+1, vObj+1, 0, a.sizeof(tPtr.Elem())) + } else { + res = vObj + } + + if a.addLabel(c.result, res) { + changed = true + } + } + if changed { + a.addWork(c.result) + } +} + +func ext۰reflect۰Indirect(a *analysis, cgn *cgnode) { + a.addConstraint(&reflectIndirectConstraint{ + cgn: cgn, + v: a.funcParams(cgn.obj), + result: a.funcResults(cgn.obj), + }) +} + +// ---------- func MakeChan(Type) Value ---------- + +// result = MakeChan(typ) +type reflectMakeChanConstraint struct { + cgn *cgnode + typ nodeid // (ptr) + result nodeid // (indirect) +} + +func (c *reflectMakeChanConstraint) ptr() nodeid { return c.typ } +func (c *reflectMakeChanConstraint) presolve(h *hvn) { + h.markIndirect(onodeid(c.result), "reflectMakeChan.result") +} +func (c *reflectMakeChanConstraint) renumber(mapping []nodeid) { + c.typ = mapping[c.typ] + c.result = mapping[c.result] +} + +func (c *reflectMakeChanConstraint) String() string { + return fmt.Sprintf("n%d = reflect.MakeChan(n%d)", c.result, c.typ) +} + +func (c *reflectMakeChanConstraint) solve(a *analysis, delta *nodeset) { + changed := false + for _, x := range delta.AppendTo(a.deltaSpace) { + typObj := nodeid(x) + T := a.rtypeTaggedValue(typObj) + tChan, ok := T.Underlying().(*types.Chan) + if !ok || tChan.Dir() != types.SendRecv { + continue // not a bidirectional channel type + } + + obj := a.nextNode() + a.addNodes(tChan.Elem(), "reflect.MakeChan.value") + a.endObject(obj, c.cgn, nil) + + // put its address in a new T-tagged object + id := a.makeTagged(T, c.cgn, nil) + a.addLabel(id+1, obj) + + // flow the T-tagged object to the result + if a.addLabel(c.result, id) { + changed = true + } + } + if changed { + a.addWork(c.result) + } +} + +func ext۰reflect۰MakeChan(a *analysis, cgn *cgnode) { + a.addConstraint(&reflectMakeChanConstraint{ + cgn: cgn, + typ: a.funcParams(cgn.obj), + result: a.funcResults(cgn.obj), + }) +} + +func ext۰reflect۰MakeFunc(a *analysis, cgn *cgnode) {} // TODO(adonovan) + +// ---------- func MakeMap(Type) Value ---------- + +// result = MakeMap(typ) +type reflectMakeMapConstraint struct { + cgn *cgnode + typ nodeid // (ptr) + result nodeid // (indirect) +} + +func (c *reflectMakeMapConstraint) ptr() nodeid { return c.typ } +func (c *reflectMakeMapConstraint) presolve(h *hvn) { + h.markIndirect(onodeid(c.result), "reflectMakeMap.result") +} +func (c *reflectMakeMapConstraint) renumber(mapping []nodeid) { + c.typ = mapping[c.typ] + c.result = mapping[c.result] +} + +func (c *reflectMakeMapConstraint) String() string { + return fmt.Sprintf("n%d = reflect.MakeMap(n%d)", c.result, c.typ) +} + +func (c *reflectMakeMapConstraint) solve(a *analysis, delta *nodeset) { + changed := false + for _, x := range delta.AppendTo(a.deltaSpace) { + typObj := nodeid(x) + T := a.rtypeTaggedValue(typObj) + tMap, ok := T.Underlying().(*types.Map) + if !ok { + continue // not a map type + } + + mapObj := a.nextNode() + a.addNodes(tMap.Key(), "reflect.MakeMap.key") + a.addNodes(tMap.Elem(), "reflect.MakeMap.value") + a.endObject(mapObj, c.cgn, nil) + + // put its address in a new T-tagged object + id := a.makeTagged(T, c.cgn, nil) + a.addLabel(id+1, mapObj) + + // flow the T-tagged object to the result + if a.addLabel(c.result, id) { + changed = true + } + } + if changed { + a.addWork(c.result) + } +} + +func ext۰reflect۰MakeMap(a *analysis, cgn *cgnode) { + a.addConstraint(&reflectMakeMapConstraint{ + cgn: cgn, + typ: a.funcParams(cgn.obj), + result: a.funcResults(cgn.obj), + }) +} + +// ---------- func MakeSlice(Type) Value ---------- + +// result = MakeSlice(typ) +type reflectMakeSliceConstraint struct { + cgn *cgnode + typ nodeid // (ptr) + result nodeid // (indirect) +} + +func (c *reflectMakeSliceConstraint) ptr() nodeid { return c.typ } +func (c *reflectMakeSliceConstraint) presolve(h *hvn) { + h.markIndirect(onodeid(c.result), "reflectMakeSlice.result") +} +func (c *reflectMakeSliceConstraint) renumber(mapping []nodeid) { + c.typ = mapping[c.typ] + c.result = mapping[c.result] +} + +func (c *reflectMakeSliceConstraint) String() string { + return fmt.Sprintf("n%d = reflect.MakeSlice(n%d)", c.result, c.typ) +} + +func (c *reflectMakeSliceConstraint) solve(a *analysis, delta *nodeset) { + changed := false + for _, x := range delta.AppendTo(a.deltaSpace) { + typObj := nodeid(x) + T := a.rtypeTaggedValue(typObj) + if _, ok := T.Underlying().(*types.Slice); !ok { + continue // not a slice type + } + + obj := a.nextNode() + a.addNodes(sliceToArray(T), "reflect.MakeSlice") + a.endObject(obj, c.cgn, nil) + + // put its address in a new T-tagged object + id := a.makeTagged(T, c.cgn, nil) + a.addLabel(id+1, obj) + + // flow the T-tagged object to the result + if a.addLabel(c.result, id) { + changed = true + } + } + if changed { + a.addWork(c.result) + } +} + +func ext۰reflect۰MakeSlice(a *analysis, cgn *cgnode) { + a.addConstraint(&reflectMakeSliceConstraint{ + cgn: cgn, + typ: a.funcParams(cgn.obj), + result: a.funcResults(cgn.obj), + }) +} + +func ext۰reflect۰MapOf(a *analysis, cgn *cgnode) {} // TODO(adonovan) + +// ---------- func New(Type) Value ---------- + +// result = New(typ) +type reflectNewConstraint struct { + cgn *cgnode + typ nodeid // (ptr) + result nodeid // (indirect) +} + +func (c *reflectNewConstraint) ptr() nodeid { return c.typ } +func (c *reflectNewConstraint) presolve(h *hvn) { + h.markIndirect(onodeid(c.result), "reflectNew.result") +} +func (c *reflectNewConstraint) renumber(mapping []nodeid) { + c.typ = mapping[c.typ] + c.result = mapping[c.result] +} + +func (c *reflectNewConstraint) String() string { + return fmt.Sprintf("n%d = reflect.New(n%d)", c.result, c.typ) +} + +func (c *reflectNewConstraint) solve(a *analysis, delta *nodeset) { + changed := false + for _, x := range delta.AppendTo(a.deltaSpace) { + typObj := nodeid(x) + T := a.rtypeTaggedValue(typObj) + + // allocate new T object + newObj := a.nextNode() + a.addNodes(T, "reflect.New") + a.endObject(newObj, c.cgn, nil) + + // put its address in a new *T-tagged object + id := a.makeTagged(types.NewPointer(T), c.cgn, nil) + a.addLabel(id+1, newObj) + + // flow the pointer to the result + if a.addLabel(c.result, id) { + changed = true + } + } + if changed { + a.addWork(c.result) + } +} + +func ext۰reflect۰New(a *analysis, cgn *cgnode) { + a.addConstraint(&reflectNewConstraint{ + cgn: cgn, + typ: a.funcParams(cgn.obj), + result: a.funcResults(cgn.obj), + }) +} + +func ext۰reflect۰NewAt(a *analysis, cgn *cgnode) { + ext۰reflect۰New(a, cgn) + + // TODO(adonovan): also report dynamic calls to unsound intrinsics. + if site := cgn.callersite; site != nil { + a.warnf(site.pos(), "unsound: %s contains a reflect.NewAt() call", site.instr.Parent()) + } +} + +// ---------- func PtrTo(Type) Type ---------- + +// result = PtrTo(t) +type reflectPtrToConstraint struct { + cgn *cgnode + t nodeid // (ptr) + result nodeid // (indirect) +} + +func (c *reflectPtrToConstraint) ptr() nodeid { return c.t } +func (c *reflectPtrToConstraint) presolve(h *hvn) { + h.markIndirect(onodeid(c.result), "reflectPtrTo.result") +} +func (c *reflectPtrToConstraint) renumber(mapping []nodeid) { + c.t = mapping[c.t] + c.result = mapping[c.result] +} + +func (c *reflectPtrToConstraint) String() string { + return fmt.Sprintf("n%d = reflect.PtrTo(n%d)", c.result, c.t) +} + +func (c *reflectPtrToConstraint) solve(a *analysis, delta *nodeset) { + changed := false + for _, x := range delta.AppendTo(a.deltaSpace) { + tObj := nodeid(x) + T := a.rtypeTaggedValue(tObj) + + if typeTooHigh(T) { + continue + } + + if a.addLabel(c.result, a.makeRtype(types.NewPointer(T))) { + changed = true + } + } + if changed { + a.addWork(c.result) + } +} + +func ext۰reflect۰PtrTo(a *analysis, cgn *cgnode) { + a.addConstraint(&reflectPtrToConstraint{ + cgn: cgn, + t: a.funcParams(cgn.obj), + result: a.funcResults(cgn.obj), + }) +} + +func ext۰reflect۰Select(a *analysis, cgn *cgnode) {} // TODO(adonovan) + +// ---------- func SliceOf(Type) Type ---------- + +// result = SliceOf(t) +type reflectSliceOfConstraint struct { + cgn *cgnode + t nodeid // (ptr) + result nodeid // (indirect) +} + +func (c *reflectSliceOfConstraint) ptr() nodeid { return c.t } +func (c *reflectSliceOfConstraint) presolve(h *hvn) { + h.markIndirect(onodeid(c.result), "reflectSliceOf.result") +} +func (c *reflectSliceOfConstraint) renumber(mapping []nodeid) { + c.t = mapping[c.t] + c.result = mapping[c.result] +} + +func (c *reflectSliceOfConstraint) String() string { + return fmt.Sprintf("n%d = reflect.SliceOf(n%d)", c.result, c.t) +} + +func (c *reflectSliceOfConstraint) solve(a *analysis, delta *nodeset) { + changed := false + for _, x := range delta.AppendTo(a.deltaSpace) { + tObj := nodeid(x) + T := a.rtypeTaggedValue(tObj) + + if typeTooHigh(T) { + continue + } + + if a.addLabel(c.result, a.makeRtype(types.NewSlice(T))) { + changed = true + } + } + if changed { + a.addWork(c.result) + } +} + +func ext۰reflect۰SliceOf(a *analysis, cgn *cgnode) { + a.addConstraint(&reflectSliceOfConstraint{ + cgn: cgn, + t: a.funcParams(cgn.obj), + result: a.funcResults(cgn.obj), + }) +} + +// ---------- func TypeOf(v Value) Type ---------- + +// result = TypeOf(i) +type reflectTypeOfConstraint struct { + cgn *cgnode + i nodeid // (ptr) + result nodeid // (indirect) +} + +func (c *reflectTypeOfConstraint) ptr() nodeid { return c.i } +func (c *reflectTypeOfConstraint) presolve(h *hvn) { + h.markIndirect(onodeid(c.result), "reflectTypeOf.result") +} +func (c *reflectTypeOfConstraint) renumber(mapping []nodeid) { + c.i = mapping[c.i] + c.result = mapping[c.result] +} + +func (c *reflectTypeOfConstraint) String() string { + return fmt.Sprintf("n%d = reflect.TypeOf(n%d)", c.result, c.i) +} + +func (c *reflectTypeOfConstraint) solve(a *analysis, delta *nodeset) { + changed := false + for _, x := range delta.AppendTo(a.deltaSpace) { + iObj := nodeid(x) + tDyn, _, _ := a.taggedValue(iObj) + if a.addLabel(c.result, a.makeRtype(tDyn)) { + changed = true + } + } + if changed { + a.addWork(c.result) + } +} + +func ext۰reflect۰TypeOf(a *analysis, cgn *cgnode) { + a.addConstraint(&reflectTypeOfConstraint{ + cgn: cgn, + i: a.funcParams(cgn.obj), + result: a.funcResults(cgn.obj), + }) +} + +// ---------- func ValueOf(interface{}) Value ---------- + +func ext۰reflect۰ValueOf(a *analysis, cgn *cgnode) { + // TODO(adonovan): when we start creating indirect tagged + // objects, we'll need to handle them specially here since + // they must never appear in the PTS of an interface{}. + a.copy(a.funcResults(cgn.obj), a.funcParams(cgn.obj), 1) +} + +// ---------- func Zero(Type) Value ---------- + +// result = Zero(typ) +type reflectZeroConstraint struct { + cgn *cgnode + typ nodeid // (ptr) + result nodeid // (indirect) +} + +func (c *reflectZeroConstraint) ptr() nodeid { return c.typ } +func (c *reflectZeroConstraint) presolve(h *hvn) { + h.markIndirect(onodeid(c.result), "reflectZero.result") +} +func (c *reflectZeroConstraint) renumber(mapping []nodeid) { + c.typ = mapping[c.typ] + c.result = mapping[c.result] +} + +func (c *reflectZeroConstraint) String() string { + return fmt.Sprintf("n%d = reflect.Zero(n%d)", c.result, c.typ) +} + +func (c *reflectZeroConstraint) solve(a *analysis, delta *nodeset) { + changed := false + for _, x := range delta.AppendTo(a.deltaSpace) { + typObj := nodeid(x) + T := a.rtypeTaggedValue(typObj) + + // TODO(adonovan): if T is an interface type, we need + // to create an indirect tagged object containing + // new(T). To avoid updates of such shared values, + // we'll need another flag on indirect tagged objects + // that marks whether they are addressable or + // readonly, just like the reflect package does. + + // memoize using a.reflectZeros[T] + var id nodeid + if z := a.reflectZeros.At(T); false && z != nil { + id = z.(nodeid) + } else { + id = a.makeTagged(T, c.cgn, nil) + a.reflectZeros.Set(T, id) + } + if a.addLabel(c.result, id) { + changed = true + } + } + if changed { + a.addWork(c.result) + } +} + +func ext۰reflect۰Zero(a *analysis, cgn *cgnode) { + a.addConstraint(&reflectZeroConstraint{ + cgn: cgn, + typ: a.funcParams(cgn.obj), + result: a.funcResults(cgn.obj), + }) +} + +// -------------------- (*reflect.rtype) methods -------------------- + +// ---------- func (*rtype) Elem() Type ---------- + +// result = Elem(t) +type rtypeElemConstraint struct { + cgn *cgnode + t nodeid // (ptr) + result nodeid // (indirect) +} + +func (c *rtypeElemConstraint) ptr() nodeid { return c.t } +func (c *rtypeElemConstraint) presolve(h *hvn) { + h.markIndirect(onodeid(c.result), "rtypeElem.result") +} +func (c *rtypeElemConstraint) renumber(mapping []nodeid) { + c.t = mapping[c.t] + c.result = mapping[c.result] +} + +func (c *rtypeElemConstraint) String() string { + return fmt.Sprintf("n%d = (*reflect.rtype).Elem(n%d)", c.result, c.t) +} + +func (c *rtypeElemConstraint) solve(a *analysis, delta *nodeset) { + // Implemented by *types.{Map,Chan,Array,Slice,Pointer}. + type hasElem interface { + Elem() types.Type + } + changed := false + for _, x := range delta.AppendTo(a.deltaSpace) { + tObj := nodeid(x) + T := a.nodes[tObj].obj.data.(types.Type) + if tHasElem, ok := T.Underlying().(hasElem); ok { + if a.addLabel(c.result, a.makeRtype(tHasElem.Elem())) { + changed = true + } + } + } + if changed { + a.addWork(c.result) + } +} + +func ext۰reflect۰rtype۰Elem(a *analysis, cgn *cgnode) { + a.addConstraint(&rtypeElemConstraint{ + cgn: cgn, + t: a.funcParams(cgn.obj), + result: a.funcResults(cgn.obj), + }) +} + +// ---------- func (*rtype) Field(int) StructField ---------- +// ---------- func (*rtype) FieldByName(string) (StructField, bool) ---------- + +// result = FieldByName(t, name) +// result = Field(t, _) +type rtypeFieldByNameConstraint struct { + cgn *cgnode + name string // name of field; "" for unknown + t nodeid // (ptr) + result nodeid // (indirect) +} + +func (c *rtypeFieldByNameConstraint) ptr() nodeid { return c.t } +func (c *rtypeFieldByNameConstraint) presolve(h *hvn) { + h.markIndirect(onodeid(c.result+3), "rtypeFieldByName.result.Type") +} +func (c *rtypeFieldByNameConstraint) renumber(mapping []nodeid) { + c.t = mapping[c.t] + c.result = mapping[c.result] +} + +func (c *rtypeFieldByNameConstraint) String() string { + return fmt.Sprintf("n%d = (*reflect.rtype).FieldByName(n%d, %q)", c.result, c.t, c.name) +} + +func (c *rtypeFieldByNameConstraint) solve(a *analysis, delta *nodeset) { + // type StructField struct { + // 0 __identity__ + // 1 Name string + // 2 PkgPath string + // 3 Type Type + // 4 Tag StructTag + // 5 Offset uintptr + // 6 Index []int + // 7 Anonymous bool + // } + + for _, x := range delta.AppendTo(a.deltaSpace) { + tObj := nodeid(x) + T := a.nodes[tObj].obj.data.(types.Type) + tStruct, ok := T.Underlying().(*types.Struct) + if !ok { + continue // not a struct type + } + + n := tStruct.NumFields() + for i := 0; i < n; i++ { + f := tStruct.Field(i) + if c.name == "" || c.name == f.Name() { + + // a.offsetOf(Type) is 3. + if id := c.result + 3; a.addLabel(id, a.makeRtype(f.Type())) { + a.addWork(id) + } + // TODO(adonovan): StructField.Index should be non-nil. + } + } + } +} + +func ext۰reflect۰rtype۰FieldByName(a *analysis, cgn *cgnode) { + // If we have access to the callsite, + // and the argument is a string constant, + // return only that field. + var name string + if site := cgn.callersite; site != nil { + if c, ok := site.instr.Common().Args[0].(*ssa.Const); ok { + name = exact.StringVal(c.Value) + } + } + + a.addConstraint(&rtypeFieldByNameConstraint{ + cgn: cgn, + name: name, + t: a.funcParams(cgn.obj), + result: a.funcResults(cgn.obj), + }) +} + +func ext۰reflect۰rtype۰Field(a *analysis, cgn *cgnode) { + // No-one ever calls Field with a constant argument, + // so we don't specialize that case. + a.addConstraint(&rtypeFieldByNameConstraint{ + cgn: cgn, + t: a.funcParams(cgn.obj), + result: a.funcResults(cgn.obj), + }) +} + +func ext۰reflect۰rtype۰FieldByIndex(a *analysis, cgn *cgnode) {} // TODO(adonovan) +func ext۰reflect۰rtype۰FieldByNameFunc(a *analysis, cgn *cgnode) {} // TODO(adonovan) + +// ---------- func (*rtype) In/Out(i int) Type ---------- + +// result = In/Out(t, i) +type rtypeInOutConstraint struct { + cgn *cgnode + t nodeid // (ptr) + result nodeid // (indirect) + out bool + i int // -ve if not a constant +} + +func (c *rtypeInOutConstraint) ptr() nodeid { return c.t } +func (c *rtypeInOutConstraint) presolve(h *hvn) { + h.markIndirect(onodeid(c.result), "rtypeInOut.result") +} +func (c *rtypeInOutConstraint) renumber(mapping []nodeid) { + c.t = mapping[c.t] + c.result = mapping[c.result] +} + +func (c *rtypeInOutConstraint) String() string { + return fmt.Sprintf("n%d = (*reflect.rtype).InOut(n%d, %d)", c.result, c.t, c.i) +} + +func (c *rtypeInOutConstraint) solve(a *analysis, delta *nodeset) { + changed := false + for _, x := range delta.AppendTo(a.deltaSpace) { + tObj := nodeid(x) + T := a.nodes[tObj].obj.data.(types.Type) + sig, ok := T.Underlying().(*types.Signature) + if !ok { + continue // not a func type + } + + tuple := sig.Params() + if c.out { + tuple = sig.Results() + } + for i, n := 0, tuple.Len(); i < n; i++ { + if c.i < 0 || c.i == i { + if a.addLabel(c.result, a.makeRtype(tuple.At(i).Type())) { + changed = true + } + } + } + } + if changed { + a.addWork(c.result) + } +} + +func ext۰reflect۰rtype۰InOut(a *analysis, cgn *cgnode, out bool) { + // If we have access to the callsite, + // and the argument is an int constant, + // return only that parameter. + index := -1 + if site := cgn.callersite; site != nil { + if c, ok := site.instr.Common().Args[0].(*ssa.Const); ok { + v, _ := exact.Int64Val(c.Value) + index = int(v) + } + } + a.addConstraint(&rtypeInOutConstraint{ + cgn: cgn, + t: a.funcParams(cgn.obj), + result: a.funcResults(cgn.obj), + out: out, + i: index, + }) +} + +func ext۰reflect۰rtype۰In(a *analysis, cgn *cgnode) { + ext۰reflect۰rtype۰InOut(a, cgn, false) +} + +func ext۰reflect۰rtype۰Out(a *analysis, cgn *cgnode) { + ext۰reflect۰rtype۰InOut(a, cgn, true) +} + +// ---------- func (*rtype) Key() Type ---------- + +// result = Key(t) +type rtypeKeyConstraint struct { + cgn *cgnode + t nodeid // (ptr) + result nodeid // (indirect) +} + +func (c *rtypeKeyConstraint) ptr() nodeid { return c.t } +func (c *rtypeKeyConstraint) presolve(h *hvn) { + h.markIndirect(onodeid(c.result), "rtypeKey.result") +} +func (c *rtypeKeyConstraint) renumber(mapping []nodeid) { + c.t = mapping[c.t] + c.result = mapping[c.result] +} + +func (c *rtypeKeyConstraint) String() string { + return fmt.Sprintf("n%d = (*reflect.rtype).Key(n%d)", c.result, c.t) +} + +func (c *rtypeKeyConstraint) solve(a *analysis, delta *nodeset) { + changed := false + for _, x := range delta.AppendTo(a.deltaSpace) { + tObj := nodeid(x) + T := a.nodes[tObj].obj.data.(types.Type) + if tMap, ok := T.Underlying().(*types.Map); ok { + if a.addLabel(c.result, a.makeRtype(tMap.Key())) { + changed = true + } + } + } + if changed { + a.addWork(c.result) + } +} + +func ext۰reflect۰rtype۰Key(a *analysis, cgn *cgnode) { + a.addConstraint(&rtypeKeyConstraint{ + cgn: cgn, + t: a.funcParams(cgn.obj), + result: a.funcResults(cgn.obj), + }) +} + +// ---------- func (*rtype) Method(int) (Method, bool) ---------- +// ---------- func (*rtype) MethodByName(string) (Method, bool) ---------- + +// result = MethodByName(t, name) +// result = Method(t, _) +type rtypeMethodByNameConstraint struct { + cgn *cgnode + name string // name of method; "" for unknown + t nodeid // (ptr) + result nodeid // (indirect) +} + +func (c *rtypeMethodByNameConstraint) ptr() nodeid { return c.t } +func (c *rtypeMethodByNameConstraint) presolve(h *hvn) { + h.markIndirect(onodeid(c.result+3), "rtypeMethodByName.result.Type") + h.markIndirect(onodeid(c.result+4), "rtypeMethodByName.result.Func") +} +func (c *rtypeMethodByNameConstraint) renumber(mapping []nodeid) { + c.t = mapping[c.t] + c.result = mapping[c.result] +} + +func (c *rtypeMethodByNameConstraint) String() string { + return fmt.Sprintf("n%d = (*reflect.rtype).MethodByName(n%d, %q)", c.result, c.t, c.name) +} + +// changeRecv returns sig with Recv prepended to Params(). +func changeRecv(sig *types.Signature) *types.Signature { + params := sig.Params() + n := params.Len() + p2 := make([]*types.Var, n+1) + p2[0] = sig.Recv() + for i := 0; i < n; i++ { + p2[i+1] = params.At(i) + } + return types.NewSignature(nil, types.NewTuple(p2...), sig.Results(), sig.Variadic()) +} + +func (c *rtypeMethodByNameConstraint) solve(a *analysis, delta *nodeset) { + for _, x := range delta.AppendTo(a.deltaSpace) { + tObj := nodeid(x) + T := a.nodes[tObj].obj.data.(types.Type) + + isIface := isInterface(T) + + // We don't use Lookup(c.name) when c.name != "" to avoid + // ambiguity: >1 unexported methods could match. + mset := a.prog.MethodSets.MethodSet(T) + for i, n := 0, mset.Len(); i < n; i++ { + sel := mset.At(i) + if c.name == "" || c.name == sel.Obj().Name() { + // type Method struct { + // 0 __identity__ + // 1 Name string + // 2 PkgPath string + // 3 Type Type + // 4 Func Value + // 5 Index int + // } + + var sig *types.Signature + var fn *ssa.Function + if isIface { + sig = sel.Type().(*types.Signature) + } else { + fn = a.prog.Method(sel) + // move receiver to params[0] + sig = changeRecv(fn.Signature) + } + + // a.offsetOf(Type) is 3. + if id := c.result + 3; a.addLabel(id, a.makeRtype(sig)) { + a.addWork(id) + } + if fn != nil { + // a.offsetOf(Func) is 4. + if id := c.result + 4; a.addLabel(id, a.objectNode(nil, fn)) { + a.addWork(id) + } + } + } + } + } +} + +func ext۰reflect۰rtype۰MethodByName(a *analysis, cgn *cgnode) { + // If we have access to the callsite, + // and the argument is a string constant, + // return only that method. + var name string + if site := cgn.callersite; site != nil { + if c, ok := site.instr.Common().Args[0].(*ssa.Const); ok { + name = exact.StringVal(c.Value) + } + } + + a.addConstraint(&rtypeMethodByNameConstraint{ + cgn: cgn, + name: name, + t: a.funcParams(cgn.obj), + result: a.funcResults(cgn.obj), + }) +} + +func ext۰reflect۰rtype۰Method(a *analysis, cgn *cgnode) { + // No-one ever calls Method with a constant argument, + // so we don't specialize that case. + a.addConstraint(&rtypeMethodByNameConstraint{ + cgn: cgn, + t: a.funcParams(cgn.obj), + result: a.funcResults(cgn.obj), + }) +} + +// typeHeight returns the "height" of the type, which is roughly +// speaking the number of chan, map, pointer and slice type constructors +// at the root of T; these are the four type kinds that can be created +// via reflection. Chan and map constructors are counted as double the +// height of slice and pointer constructors since they are less often +// deeply nested. +// +// The solver rules for type constructors must somehow bound the set of +// types they create to ensure termination of the algorithm in cases +// where the output of a type constructor flows to its input, e.g. +// +// func f(t reflect.Type) { +// f(reflect.PtrTo(t)) +// } +// +// It does this by limiting the type height to k, but this still leaves +// a potentially exponential (4^k) number of of types that may be +// enumerated in pathological cases. +// +func typeHeight(T types.Type) int { + switch T := T.(type) { + case *types.Chan: + return 2 + typeHeight(T.Elem()) + case *types.Map: + k := typeHeight(T.Key()) + v := typeHeight(T.Elem()) + if v > k { + k = v // max(k, v) + } + return 2 + k + case *types.Slice: + return 1 + typeHeight(T.Elem()) + case *types.Pointer: + return 1 + typeHeight(T.Elem()) + } + return 0 +} + +func typeTooHigh(T types.Type) bool { + return typeHeight(T) > 3 +} diff --git a/vendor/golang.org/x/tools/go/pointer/solve.go b/vendor/golang.org/x/tools/go/pointer/solve.go new file mode 100644 index 0000000..ad1a65f --- /dev/null +++ b/vendor/golang.org/x/tools/go/pointer/solve.go @@ -0,0 +1,371 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package pointer + +// This file defines a naive Andersen-style solver for the inclusion +// constraint system. + +import ( + "fmt" + + "golang.org/x/tools/go/types" +) + +type solverState struct { + complex []constraint // complex constraints attached to this node + copyTo nodeset // simple copy constraint edges + pts nodeset // points-to set of this node + prevPTS nodeset // pts(n) in previous iteration (for difference propagation) +} + +func (a *analysis) solve() { + start("Solving") + if a.log != nil { + fmt.Fprintf(a.log, "\n\n==== Solving constraints\n\n") + } + + // Solver main loop. + var delta nodeset + for { + // Add new constraints to the graph: + // static constraints from SSA on round 1, + // dynamic constraints from reflection thereafter. + a.processNewConstraints() + + var x int + if !a.work.TakeMin(&x) { + break // empty + } + id := nodeid(x) + if a.log != nil { + fmt.Fprintf(a.log, "\tnode n%d\n", id) + } + + n := a.nodes[id] + + // Difference propagation. + delta.Difference(&n.solve.pts.Sparse, &n.solve.prevPTS.Sparse) + if delta.IsEmpty() { + continue + } + if a.log != nil { + fmt.Fprintf(a.log, "\t\tpts(n%d : %s) = %s + %s\n", + id, n.typ, &delta, &n.solve.prevPTS) + } + n.solve.prevPTS.Copy(&n.solve.pts.Sparse) + + // Apply all resolution rules attached to n. + a.solveConstraints(n, &delta) + + if a.log != nil { + fmt.Fprintf(a.log, "\t\tpts(n%d) = %s\n", id, &n.solve.pts) + } + } + + if !a.nodes[0].solve.pts.IsEmpty() { + panic(fmt.Sprintf("pts(0) is nonempty: %s", &a.nodes[0].solve.pts)) + } + + // Release working state (but keep final PTS). + for _, n := range a.nodes { + n.solve.complex = nil + n.solve.copyTo.Clear() + n.solve.prevPTS.Clear() + } + + if a.log != nil { + fmt.Fprintf(a.log, "Solver done\n") + + // Dump solution. + for i, n := range a.nodes { + if !n.solve.pts.IsEmpty() { + fmt.Fprintf(a.log, "pts(n%d) = %s : %s\n", i, &n.solve.pts, n.typ) + } + } + } + stop("Solving") +} + +// processNewConstraints takes the new constraints from a.constraints +// and adds them to the graph, ensuring +// that new constraints are applied to pre-existing labels and +// that pre-existing constraints are applied to new labels. +// +func (a *analysis) processNewConstraints() { + // Take the slice of new constraints. + // (May grow during call to solveConstraints.) + constraints := a.constraints + a.constraints = nil + + // Initialize points-to sets from addr-of (base) constraints. + for _, c := range constraints { + if c, ok := c.(*addrConstraint); ok { + dst := a.nodes[c.dst] + dst.solve.pts.add(c.src) + + // Populate the worklist with nodes that point to + // something initially (due to addrConstraints) and + // have other constraints attached. + // (A no-op in round 1.) + if !dst.solve.copyTo.IsEmpty() || len(dst.solve.complex) > 0 { + a.addWork(c.dst) + } + } + } + + // Attach simple (copy) and complex constraints to nodes. + var stale nodeset + for _, c := range constraints { + var id nodeid + switch c := c.(type) { + case *addrConstraint: + // base constraints handled in previous loop + continue + case *copyConstraint: + // simple (copy) constraint + id = c.src + a.nodes[id].solve.copyTo.add(c.dst) + default: + // complex constraint + id = c.ptr() + solve := a.nodes[id].solve + solve.complex = append(solve.complex, c) + } + + if n := a.nodes[id]; !n.solve.pts.IsEmpty() { + if !n.solve.prevPTS.IsEmpty() { + stale.add(id) + } + a.addWork(id) + } + } + // Apply new constraints to pre-existing PTS labels. + var space [50]int + for _, id := range stale.AppendTo(space[:0]) { + n := a.nodes[nodeid(id)] + a.solveConstraints(n, &n.solve.prevPTS) + } +} + +// solveConstraints applies each resolution rule attached to node n to +// the set of labels delta. It may generate new constraints in +// a.constraints. +// +func (a *analysis) solveConstraints(n *node, delta *nodeset) { + if delta.IsEmpty() { + return + } + + // Process complex constraints dependent on n. + for _, c := range n.solve.complex { + if a.log != nil { + fmt.Fprintf(a.log, "\t\tconstraint %s\n", c) + } + c.solve(a, delta) + } + + // Process copy constraints. + var copySeen nodeset + for _, x := range n.solve.copyTo.AppendTo(a.deltaSpace) { + mid := nodeid(x) + if copySeen.add(mid) { + if a.nodes[mid].solve.pts.addAll(delta) { + a.addWork(mid) + } + } + } +} + +// addLabel adds label to the points-to set of ptr and reports whether the set grew. +func (a *analysis) addLabel(ptr, label nodeid) bool { + b := a.nodes[ptr].solve.pts.add(label) + if b && a.log != nil { + fmt.Fprintf(a.log, "\t\tpts(n%d) += n%d\n", ptr, label) + } + return b +} + +func (a *analysis) addWork(id nodeid) { + a.work.Insert(int(id)) + if a.log != nil { + fmt.Fprintf(a.log, "\t\twork: n%d\n", id) + } +} + +// onlineCopy adds a copy edge. It is called online, i.e. during +// solving, so it adds edges and pts members directly rather than by +// instantiating a 'constraint'. +// +// The size of the copy is implicitly 1. +// It returns true if pts(dst) changed. +// +func (a *analysis) onlineCopy(dst, src nodeid) bool { + if dst != src { + if nsrc := a.nodes[src]; nsrc.solve.copyTo.add(dst) { + if a.log != nil { + fmt.Fprintf(a.log, "\t\t\tdynamic copy n%d <- n%d\n", dst, src) + } + // TODO(adonovan): most calls to onlineCopy + // are followed by addWork, possibly batched + // via a 'changed' flag; see if there's a + // noticeable penalty to calling addWork here. + return a.nodes[dst].solve.pts.addAll(&nsrc.solve.pts) + } + } + return false +} + +// Returns sizeof. +// Implicitly adds nodes to worklist. +// +// TODO(adonovan): now that we support a.copy() during solving, we +// could eliminate onlineCopyN, but it's much slower. Investigate. +// +func (a *analysis) onlineCopyN(dst, src nodeid, sizeof uint32) uint32 { + for i := uint32(0); i < sizeof; i++ { + if a.onlineCopy(dst, src) { + a.addWork(dst) + } + src++ + dst++ + } + return sizeof +} + +func (c *loadConstraint) solve(a *analysis, delta *nodeset) { + var changed bool + for _, x := range delta.AppendTo(a.deltaSpace) { + k := nodeid(x) + koff := k + nodeid(c.offset) + if a.onlineCopy(c.dst, koff) { + changed = true + } + } + if changed { + a.addWork(c.dst) + } +} + +func (c *storeConstraint) solve(a *analysis, delta *nodeset) { + for _, x := range delta.AppendTo(a.deltaSpace) { + k := nodeid(x) + koff := k + nodeid(c.offset) + if a.onlineCopy(koff, c.src) { + a.addWork(koff) + } + } +} + +func (c *offsetAddrConstraint) solve(a *analysis, delta *nodeset) { + dst := a.nodes[c.dst] + for _, x := range delta.AppendTo(a.deltaSpace) { + k := nodeid(x) + if dst.solve.pts.add(k + nodeid(c.offset)) { + a.addWork(c.dst) + } + } +} + +func (c *typeFilterConstraint) solve(a *analysis, delta *nodeset) { + for _, x := range delta.AppendTo(a.deltaSpace) { + ifaceObj := nodeid(x) + tDyn, _, indirect := a.taggedValue(ifaceObj) + if indirect { + // TODO(adonovan): we'll need to implement this + // when we start creating indirect tagged objects. + panic("indirect tagged object") + } + + if types.AssignableTo(tDyn, c.typ) { + if a.addLabel(c.dst, ifaceObj) { + a.addWork(c.dst) + } + } + } +} + +func (c *untagConstraint) solve(a *analysis, delta *nodeset) { + predicate := types.AssignableTo + if c.exact { + predicate = types.Identical + } + for _, x := range delta.AppendTo(a.deltaSpace) { + ifaceObj := nodeid(x) + tDyn, v, indirect := a.taggedValue(ifaceObj) + if indirect { + // TODO(adonovan): we'll need to implement this + // when we start creating indirect tagged objects. + panic("indirect tagged object") + } + + if predicate(tDyn, c.typ) { + // Copy payload sans tag to dst. + // + // TODO(adonovan): opt: if tDyn is + // nonpointerlike we can skip this entire + // constraint, perhaps. We only care about + // pointers among the fields. + a.onlineCopyN(c.dst, v, a.sizeof(tDyn)) + } + } +} + +func (c *invokeConstraint) solve(a *analysis, delta *nodeset) { + for _, x := range delta.AppendTo(a.deltaSpace) { + ifaceObj := nodeid(x) + tDyn, v, indirect := a.taggedValue(ifaceObj) + if indirect { + // TODO(adonovan): we may need to implement this if + // we ever apply invokeConstraints to reflect.Value PTSs, + // e.g. for (reflect.Value).Call. + panic("indirect tagged object") + } + + // Look up the concrete method. + fn := a.prog.LookupMethod(tDyn, c.method.Pkg(), c.method.Name()) + if fn == nil { + panic(fmt.Sprintf("n%d: no ssa.Function for %s", c.iface, c.method)) + } + sig := fn.Signature + + fnObj := a.globalobj[fn] // dynamic calls use shared contour + if fnObj == 0 { + // a.objectNode(fn) was not called during gen phase. + panic(fmt.Sprintf("a.globalobj[%s]==nil", fn)) + } + + // Make callsite's fn variable point to identity of + // concrete method. (There's no need to add it to + // worklist since it never has attached constraints.) + a.addLabel(c.params, fnObj) + + // Extract value and connect to method's receiver. + // Copy payload to method's receiver param (arg0). + arg0 := a.funcParams(fnObj) + recvSize := a.sizeof(sig.Recv().Type()) + a.onlineCopyN(arg0, v, recvSize) + + src := c.params + 1 // skip past identity + dst := arg0 + nodeid(recvSize) + + // Copy caller's argument block to method formal parameters. + paramsSize := a.sizeof(sig.Params()) + a.onlineCopyN(dst, src, paramsSize) + src += nodeid(paramsSize) + dst += nodeid(paramsSize) + + // Copy method results to caller's result block. + resultsSize := a.sizeof(sig.Results()) + a.onlineCopyN(src, dst, resultsSize) + } +} + +func (c *addrConstraint) solve(a *analysis, delta *nodeset) { + panic("addr is not a complex constraint") +} + +func (c *copyConstraint) solve(a *analysis, delta *nodeset) { + panic("copy is not a complex constraint") +} diff --git a/vendor/golang.org/x/tools/go/pointer/util.go b/vendor/golang.org/x/tools/go/pointer/util.go new file mode 100644 index 0000000..d4ccbb5 --- /dev/null +++ b/vendor/golang.org/x/tools/go/pointer/util.go @@ -0,0 +1,314 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package pointer + +import ( + "bytes" + "fmt" + "log" + "os" + "os/exec" + "runtime" + "time" + + "golang.org/x/tools/container/intsets" + "golang.org/x/tools/go/types" +) + +// CanPoint reports whether the type T is pointerlike, +// for the purposes of this analysis. +func CanPoint(T types.Type) bool { + switch T := T.(type) { + case *types.Named: + if obj := T.Obj(); obj.Name() == "Value" && obj.Pkg().Path() == "reflect" { + return true // treat reflect.Value like interface{} + } + return CanPoint(T.Underlying()) + + case *types.Pointer, *types.Interface, *types.Map, *types.Chan, *types.Signature, *types.Slice: + return true + } + + return false // array struct tuple builtin basic +} + +// CanHaveDynamicTypes reports whether the type T can "hold" dynamic types, +// i.e. is an interface (incl. reflect.Type) or a reflect.Value. +// +func CanHaveDynamicTypes(T types.Type) bool { + switch T := T.(type) { + case *types.Named: + if obj := T.Obj(); obj.Name() == "Value" && obj.Pkg().Path() == "reflect" { + return true // reflect.Value + } + return CanHaveDynamicTypes(T.Underlying()) + case *types.Interface: + return true + } + return false +} + +func isInterface(T types.Type) bool { return types.IsInterface(T) } + +// mustDeref returns the element type of its argument, which must be a +// pointer; panic ensues otherwise. +func mustDeref(typ types.Type) types.Type { + return typ.Underlying().(*types.Pointer).Elem() +} + +// deref returns a pointer's element type; otherwise it returns typ. +func deref(typ types.Type) types.Type { + if p, ok := typ.Underlying().(*types.Pointer); ok { + return p.Elem() + } + return typ +} + +// A fieldInfo describes one subelement (node) of the flattening-out +// of a type T: the subelement's type and its path from the root of T. +// +// For example, for this type: +// type line struct{ points []struct{x, y int} } +// flatten() of the inner struct yields the following []fieldInfo: +// struct{ x, y int } "" +// int ".x" +// int ".y" +// and flatten(line) yields: +// struct{ points []struct{x, y int} } "" +// struct{ x, y int } ".points[*]" +// int ".points[*].x +// int ".points[*].y" +// +type fieldInfo struct { + typ types.Type + + // op and tail describe the path to the element (e.g. ".a#2.b[*].c"). + op interface{} // *Array: true; *Tuple: int; *Struct: *types.Var; *Named: nil + tail *fieldInfo +} + +// path returns a user-friendly string describing the subelement path. +// +func (fi *fieldInfo) path() string { + var buf bytes.Buffer + for p := fi; p != nil; p = p.tail { + switch op := p.op.(type) { + case bool: + fmt.Fprintf(&buf, "[*]") + case int: + fmt.Fprintf(&buf, "#%d", op) + case *types.Var: + fmt.Fprintf(&buf, ".%s", op.Name()) + } + } + return buf.String() +} + +// flatten returns a list of directly contained fields in the preorder +// traversal of the type tree of t. The resulting elements are all +// scalars (basic types or pointerlike types), except for struct/array +// "identity" nodes, whose type is that of the aggregate. +// +// reflect.Value is considered pointerlike, similar to interface{}. +// +// Callers must not mutate the result. +// +func (a *analysis) flatten(t types.Type) []*fieldInfo { + fl, ok := a.flattenMemo[t] + if !ok { + switch t := t.(type) { + case *types.Named: + u := t.Underlying() + if isInterface(u) { + // Debuggability hack: don't remove + // the named type from interfaces as + // they're very verbose. + fl = append(fl, &fieldInfo{typ: t}) + } else { + fl = a.flatten(u) + } + + case *types.Basic, + *types.Signature, + *types.Chan, + *types.Map, + *types.Interface, + *types.Slice, + *types.Pointer: + fl = append(fl, &fieldInfo{typ: t}) + + case *types.Array: + fl = append(fl, &fieldInfo{typ: t}) // identity node + for _, fi := range a.flatten(t.Elem()) { + fl = append(fl, &fieldInfo{typ: fi.typ, op: true, tail: fi}) + } + + case *types.Struct: + fl = append(fl, &fieldInfo{typ: t}) // identity node + for i, n := 0, t.NumFields(); i < n; i++ { + f := t.Field(i) + for _, fi := range a.flatten(f.Type()) { + fl = append(fl, &fieldInfo{typ: fi.typ, op: f, tail: fi}) + } + } + + case *types.Tuple: + // No identity node: tuples are never address-taken. + n := t.Len() + if n == 1 { + // Don't add a fieldInfo link for singletons, + // e.g. in params/results. + fl = append(fl, a.flatten(t.At(0).Type())...) + } else { + for i := 0; i < n; i++ { + f := t.At(i) + for _, fi := range a.flatten(f.Type()) { + fl = append(fl, &fieldInfo{typ: fi.typ, op: i, tail: fi}) + } + } + } + + default: + panic(t) + } + + a.flattenMemo[t] = fl + } + + return fl +} + +// sizeof returns the number of pointerlike abstractions (nodes) in the type t. +func (a *analysis) sizeof(t types.Type) uint32 { + return uint32(len(a.flatten(t))) +} + +// shouldTrack reports whether object type T contains (recursively) +// any fields whose addresses should be tracked. +func (a *analysis) shouldTrack(T types.Type) bool { + if a.track == trackAll { + return true // fast path + } + track, ok := a.trackTypes[T] + if !ok { + a.trackTypes[T] = true // break cycles conservatively + // NB: reflect.Value, reflect.Type are pre-populated to true. + for _, fi := range a.flatten(T) { + switch ft := fi.typ.Underlying().(type) { + case *types.Interface, *types.Signature: + track = true // needed for callgraph + case *types.Basic: + // no-op + case *types.Chan: + track = a.track&trackChan != 0 || a.shouldTrack(ft.Elem()) + case *types.Map: + track = a.track&trackMap != 0 || a.shouldTrack(ft.Key()) || a.shouldTrack(ft.Elem()) + case *types.Slice: + track = a.track&trackSlice != 0 || a.shouldTrack(ft.Elem()) + case *types.Pointer: + track = a.track&trackPtr != 0 || a.shouldTrack(ft.Elem()) + case *types.Array, *types.Struct: + // No need to look at field types since they will follow (flattened). + default: + // Includes *types.Tuple, which are never address-taken. + panic(ft) + } + if track { + break + } + } + a.trackTypes[T] = track + if !track && a.log != nil { + fmt.Fprintf(a.log, "\ttype not tracked: %s\n", T) + } + } + return track +} + +// offsetOf returns the (abstract) offset of field index within struct +// or tuple typ. +func (a *analysis) offsetOf(typ types.Type, index int) uint32 { + var offset uint32 + switch t := typ.Underlying().(type) { + case *types.Tuple: + for i := 0; i < index; i++ { + offset += a.sizeof(t.At(i).Type()) + } + case *types.Struct: + offset++ // the node for the struct itself + for i := 0; i < index; i++ { + offset += a.sizeof(t.Field(i).Type()) + } + default: + panic(fmt.Sprintf("offsetOf(%s : %T)", typ, typ)) + } + return offset +} + +// sliceToArray returns the type representing the arrays to which +// slice type slice points. +func sliceToArray(slice types.Type) *types.Array { + return types.NewArray(slice.Underlying().(*types.Slice).Elem(), 1) +} + +// Node set ------------------------------------------------------------------- + +type nodeset struct { + intsets.Sparse +} + +func (ns *nodeset) String() string { + var buf bytes.Buffer + buf.WriteRune('{') + var space [50]int + for i, n := range ns.AppendTo(space[:0]) { + if i > 0 { + buf.WriteString(", ") + } + buf.WriteRune('n') + fmt.Fprintf(&buf, "%d", n) + } + buf.WriteRune('}') + return buf.String() +} + +func (ns *nodeset) add(n nodeid) bool { + return ns.Sparse.Insert(int(n)) +} + +func (x *nodeset) addAll(y *nodeset) bool { + return x.UnionWith(&y.Sparse) +} + +// Profiling & debugging ------------------------------------------------------- + +var timers = make(map[string]time.Time) + +func start(name string) { + if debugTimers { + timers[name] = time.Now() + log.Printf("%s...\n", name) + } +} + +func stop(name string) { + if debugTimers { + log.Printf("%s took %s\n", name, time.Since(timers[name])) + } +} + +// diff runs the command "diff a b" and reports its success. +func diff(a, b string) bool { + var cmd *exec.Cmd + switch runtime.GOOS { + case "plan9": + cmd = exec.Command("/bin/diff", "-c", a, b) + default: + cmd = exec.Command("/usr/bin/diff", "-u", a, b) + } + cmd.Stdout = os.Stderr + cmd.Stderr = os.Stderr + return cmd.Run() == nil +} diff --git a/vendor/golang.org/x/tools/go/ssa/blockopt.go b/vendor/golang.org/x/tools/go/ssa/blockopt.go new file mode 100644 index 0000000..e79260a --- /dev/null +++ b/vendor/golang.org/x/tools/go/ssa/blockopt.go @@ -0,0 +1,187 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package ssa + +// Simple block optimizations to simplify the control flow graph. + +// TODO(adonovan): opt: instead of creating several "unreachable" blocks +// per function in the Builder, reuse a single one (e.g. at Blocks[1]) +// to reduce garbage. + +import ( + "fmt" + "os" +) + +// If true, perform sanity checking and show progress at each +// successive iteration of optimizeBlocks. Very verbose. +const debugBlockOpt = false + +// markReachable sets Index=-1 for all blocks reachable from b. +func markReachable(b *BasicBlock) { + b.Index = -1 + for _, succ := range b.Succs { + if succ.Index == 0 { + markReachable(succ) + } + } +} + +// deleteUnreachableBlocks marks all reachable blocks of f and +// eliminates (nils) all others, including possibly cyclic subgraphs. +// +func deleteUnreachableBlocks(f *Function) { + const white, black = 0, -1 + // We borrow b.Index temporarily as the mark bit. + for _, b := range f.Blocks { + b.Index = white + } + markReachable(f.Blocks[0]) + if f.Recover != nil { + markReachable(f.Recover) + } + for i, b := range f.Blocks { + if b.Index == white { + for _, c := range b.Succs { + if c.Index == black { + c.removePred(b) // delete white->black edge + } + } + if debugBlockOpt { + fmt.Fprintln(os.Stderr, "unreachable", b) + } + f.Blocks[i] = nil // delete b + } + } + f.removeNilBlocks() +} + +// jumpThreading attempts to apply simple jump-threading to block b, +// in which a->b->c become a->c if b is just a Jump. +// The result is true if the optimization was applied. +// +func jumpThreading(f *Function, b *BasicBlock) bool { + if b.Index == 0 { + return false // don't apply to entry block + } + if b.Instrs == nil { + return false + } + if _, ok := b.Instrs[0].(*Jump); !ok { + return false // not just a jump + } + c := b.Succs[0] + if c == b { + return false // don't apply to degenerate jump-to-self. + } + if c.hasPhi() { + return false // not sound without more effort + } + for j, a := range b.Preds { + a.replaceSucc(b, c) + + // If a now has two edges to c, replace its degenerate If by Jump. + if len(a.Succs) == 2 && a.Succs[0] == c && a.Succs[1] == c { + jump := new(Jump) + jump.setBlock(a) + a.Instrs[len(a.Instrs)-1] = jump + a.Succs = a.Succs[:1] + c.removePred(b) + } else { + if j == 0 { + c.replacePred(b, a) + } else { + c.Preds = append(c.Preds, a) + } + } + + if debugBlockOpt { + fmt.Fprintln(os.Stderr, "jumpThreading", a, b, c) + } + } + f.Blocks[b.Index] = nil // delete b + return true +} + +// fuseBlocks attempts to apply the block fusion optimization to block +// a, in which a->b becomes ab if len(a.Succs)==len(b.Preds)==1. +// The result is true if the optimization was applied. +// +func fuseBlocks(f *Function, a *BasicBlock) bool { + if len(a.Succs) != 1 { + return false + } + b := a.Succs[0] + if len(b.Preds) != 1 { + return false + } + + // Degenerate &&/|| ops may result in a straight-line CFG + // containing φ-nodes. (Ideally we'd replace such them with + // their sole operand but that requires Referrers, built later.) + if b.hasPhi() { + return false // not sound without further effort + } + + // Eliminate jump at end of A, then copy all of B across. + a.Instrs = append(a.Instrs[:len(a.Instrs)-1], b.Instrs...) + for _, instr := range b.Instrs { + instr.setBlock(a) + } + + // A inherits B's successors + a.Succs = append(a.succs2[:0], b.Succs...) + + // Fix up Preds links of all successors of B. + for _, c := range b.Succs { + c.replacePred(b, a) + } + + if debugBlockOpt { + fmt.Fprintln(os.Stderr, "fuseBlocks", a, b) + } + + f.Blocks[b.Index] = nil // delete b + return true +} + +// optimizeBlocks() performs some simple block optimizations on a +// completed function: dead block elimination, block fusion, jump +// threading. +// +func optimizeBlocks(f *Function) { + deleteUnreachableBlocks(f) + + // Loop until no further progress. + changed := true + for changed { + changed = false + + if debugBlockOpt { + f.WriteTo(os.Stderr) + mustSanityCheck(f, nil) + } + + for _, b := range f.Blocks { + // f.Blocks will temporarily contain nils to indicate + // deleted blocks; we remove them at the end. + if b == nil { + continue + } + + // Fuse blocks. b->c becomes bc. + if fuseBlocks(f, b) { + changed = true + } + + // a->b->c becomes a->c if b contains only a Jump. + if jumpThreading(f, b) { + changed = true + continue // (b was disconnected) + } + } + } + f.removeNilBlocks() +} diff --git a/vendor/golang.org/x/tools/go/ssa/builder.go b/vendor/golang.org/x/tools/go/ssa/builder.go new file mode 100644 index 0000000..5b8ce0e --- /dev/null +++ b/vendor/golang.org/x/tools/go/ssa/builder.go @@ -0,0 +1,2370 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package ssa + +// This file implements the BUILD phase of SSA construction. +// +// SSA construction has two phases, CREATE and BUILD. In the CREATE phase +// (create.go), all packages are constructed and type-checked and +// definitions of all package members are created, method-sets are +// computed, and wrapper methods are synthesized. +// ssa.Packages are created in arbitrary order. +// +// In the BUILD phase (builder.go), the builder traverses the AST of +// each Go source function and generates SSA instructions for the +// function body. Initializer expressions for package-level variables +// are emitted to the package's init() function in the order specified +// by go/types.Info.InitOrder, then code for each function in the +// package is generated in lexical order. +// The BUILD phases for distinct packages are independent and are +// executed in parallel. +// +// TODO(adonovan): indeed, building functions is now embarrassingly parallel. +// Audit for concurrency then benchmark using more goroutines. +// +// The builder's and Program's indices (maps) are populated and +// mutated during the CREATE phase, but during the BUILD phase they +// remain constant. The sole exception is Prog.methodSets and its +// related maps, which are protected by a dedicated mutex. + +import ( + "fmt" + "go/ast" + "go/token" + "os" + "sync" + "sync/atomic" + + "golang.org/x/tools/go/exact" + "golang.org/x/tools/go/types" +) + +type opaqueType struct { + types.Type + name string +} + +func (t *opaqueType) String() string { return t.name } + +var ( + varOk = newVar("ok", tBool) + varIndex = newVar("index", tInt) + + // Type constants. + tBool = types.Typ[types.Bool] + tByte = types.Typ[types.Byte] + tInt = types.Typ[types.Int] + tInvalid = types.Typ[types.Invalid] + tString = types.Typ[types.String] + tUntypedNil = types.Typ[types.UntypedNil] + tRangeIter = &opaqueType{nil, "iter"} // the type of all "range" iterators + tEface = new(types.Interface) + + // SSA Value constants. + vZero = intConst(0) + vOne = intConst(1) + vTrue = NewConst(exact.MakeBool(true), tBool) +) + +// builder holds state associated with the package currently being built. +// Its methods contain all the logic for AST-to-SSA conversion. +type builder struct{} + +// cond emits to fn code to evaluate boolean condition e and jump +// to t or f depending on its value, performing various simplifications. +// +// Postcondition: fn.currentBlock is nil. +// +func (b *builder) cond(fn *Function, e ast.Expr, t, f *BasicBlock) { + switch e := e.(type) { + case *ast.ParenExpr: + b.cond(fn, e.X, t, f) + return + + case *ast.BinaryExpr: + switch e.Op { + case token.LAND: + ltrue := fn.newBasicBlock("cond.true") + b.cond(fn, e.X, ltrue, f) + fn.currentBlock = ltrue + b.cond(fn, e.Y, t, f) + return + + case token.LOR: + lfalse := fn.newBasicBlock("cond.false") + b.cond(fn, e.X, t, lfalse) + fn.currentBlock = lfalse + b.cond(fn, e.Y, t, f) + return + } + + case *ast.UnaryExpr: + if e.Op == token.NOT { + b.cond(fn, e.X, f, t) + return + } + } + + // A traditional compiler would simplify "if false" (etc) here + // but we do not, for better fidelity to the source code. + // + // The value of a constant condition may be platform-specific, + // and may cause blocks that are reachable in some configuration + // to be hidden from subsequent analyses such as bug-finding tools. + emitIf(fn, b.expr(fn, e), t, f) +} + +// logicalBinop emits code to fn to evaluate e, a &&- or +// ||-expression whose reified boolean value is wanted. +// The value is returned. +// +func (b *builder) logicalBinop(fn *Function, e *ast.BinaryExpr) Value { + rhs := fn.newBasicBlock("binop.rhs") + done := fn.newBasicBlock("binop.done") + + // T(e) = T(e.X) = T(e.Y) after untyped constants have been + // eliminated. + // TODO(adonovan): not true; MyBool==MyBool yields UntypedBool. + t := fn.Pkg.typeOf(e) + + var short Value // value of the short-circuit path + switch e.Op { + case token.LAND: + b.cond(fn, e.X, rhs, done) + short = NewConst(exact.MakeBool(false), t) + + case token.LOR: + b.cond(fn, e.X, done, rhs) + short = NewConst(exact.MakeBool(true), t) + } + + // Is rhs unreachable? + if rhs.Preds == nil { + // Simplify false&&y to false, true||y to true. + fn.currentBlock = done + return short + } + + // Is done unreachable? + if done.Preds == nil { + // Simplify true&&y (or false||y) to y. + fn.currentBlock = rhs + return b.expr(fn, e.Y) + } + + // All edges from e.X to done carry the short-circuit value. + var edges []Value + for _ = range done.Preds { + edges = append(edges, short) + } + + // The edge from e.Y to done carries the value of e.Y. + fn.currentBlock = rhs + edges = append(edges, b.expr(fn, e.Y)) + emitJump(fn, done) + fn.currentBlock = done + + phi := &Phi{Edges: edges, Comment: e.Op.String()} + phi.pos = e.OpPos + phi.typ = t + return done.emit(phi) +} + +// exprN lowers a multi-result expression e to SSA form, emitting code +// to fn and returning a single Value whose type is a *types.Tuple. +// The caller must access the components via Extract. +// +// Multi-result expressions include CallExprs in a multi-value +// assignment or return statement, and "value,ok" uses of +// TypeAssertExpr, IndexExpr (when X is a map), and UnaryExpr (when Op +// is token.ARROW). +// +func (b *builder) exprN(fn *Function, e ast.Expr) Value { + typ := fn.Pkg.typeOf(e).(*types.Tuple) + switch e := e.(type) { + case *ast.ParenExpr: + return b.exprN(fn, e.X) + + case *ast.CallExpr: + // Currently, no built-in function nor type conversion + // has multiple results, so we can avoid some of the + // cases for single-valued CallExpr. + var c Call + b.setCall(fn, e, &c.Call) + c.typ = typ + return fn.emit(&c) + + case *ast.IndexExpr: + mapt := fn.Pkg.typeOf(e.X).Underlying().(*types.Map) + lookup := &Lookup{ + X: b.expr(fn, e.X), + Index: emitConv(fn, b.expr(fn, e.Index), mapt.Key()), + CommaOk: true, + } + lookup.setType(typ) + lookup.setPos(e.Lbrack) + return fn.emit(lookup) + + case *ast.TypeAssertExpr: + return emitTypeTest(fn, b.expr(fn, e.X), typ.At(0).Type(), e.Lparen) + + case *ast.UnaryExpr: // must be receive <- + unop := &UnOp{ + Op: token.ARROW, + X: b.expr(fn, e.X), + CommaOk: true, + } + unop.setType(typ) + unop.setPos(e.OpPos) + return fn.emit(unop) + } + panic(fmt.Sprintf("exprN(%T) in %s", e, fn)) +} + +// builtin emits to fn SSA instructions to implement a call to the +// built-in function obj with the specified arguments +// and return type. It returns the value defined by the result. +// +// The result is nil if no special handling was required; in this case +// the caller should treat this like an ordinary library function +// call. +// +func (b *builder) builtin(fn *Function, obj *types.Builtin, args []ast.Expr, typ types.Type, pos token.Pos) Value { + switch obj.Name() { + case "make": + switch typ.Underlying().(type) { + case *types.Slice: + n := b.expr(fn, args[1]) + m := n + if len(args) == 3 { + m = b.expr(fn, args[2]) + } + if m, ok := m.(*Const); ok { + // treat make([]T, n, m) as new([m]T)[:n] + cap, _ := exact.Int64Val(m.Value) + at := types.NewArray(typ.Underlying().(*types.Slice).Elem(), cap) + alloc := emitNew(fn, at, pos) + alloc.Comment = "makeslice" + v := &Slice{ + X: alloc, + High: n, + } + v.setPos(pos) + v.setType(typ) + return fn.emit(v) + } + v := &MakeSlice{ + Len: n, + Cap: m, + } + v.setPos(pos) + v.setType(typ) + return fn.emit(v) + + case *types.Map: + var res Value + if len(args) == 2 { + res = b.expr(fn, args[1]) + } + v := &MakeMap{Reserve: res} + v.setPos(pos) + v.setType(typ) + return fn.emit(v) + + case *types.Chan: + var sz Value = vZero + if len(args) == 2 { + sz = b.expr(fn, args[1]) + } + v := &MakeChan{Size: sz} + v.setPos(pos) + v.setType(typ) + return fn.emit(v) + } + + case "new": + alloc := emitNew(fn, deref(typ), pos) + alloc.Comment = "new" + return alloc + + case "len", "cap": + // Special case: len or cap of an array or *array is + // based on the type, not the value which may be nil. + // We must still evaluate the value, though. (If it + // was side-effect free, the whole call would have + // been constant-folded.) + t := deref(fn.Pkg.typeOf(args[0])).Underlying() + if at, ok := t.(*types.Array); ok { + b.expr(fn, args[0]) // for effects only + return intConst(at.Len()) + } + // Otherwise treat as normal. + + case "panic": + fn.emit(&Panic{ + X: emitConv(fn, b.expr(fn, args[0]), tEface), + pos: pos, + }) + fn.currentBlock = fn.newBasicBlock("unreachable") + return vTrue // any non-nil Value will do + } + return nil // treat all others as a regular function call +} + +// addr lowers a single-result addressable expression e to SSA form, +// emitting code to fn and returning the location (an lvalue) defined +// by the expression. +// +// If escaping is true, addr marks the base variable of the +// addressable expression e as being a potentially escaping pointer +// value. For example, in this code: +// +// a := A{ +// b: [1]B{B{c: 1}} +// } +// return &a.b[0].c +// +// the application of & causes a.b[0].c to have its address taken, +// which means that ultimately the local variable a must be +// heap-allocated. This is a simple but very conservative escape +// analysis. +// +// Operations forming potentially escaping pointers include: +// - &x, including when implicit in method call or composite literals. +// - a[:] iff a is an array (not *array) +// - references to variables in lexically enclosing functions. +// +func (b *builder) addr(fn *Function, e ast.Expr, escaping bool) lvalue { + switch e := e.(type) { + case *ast.Ident: + if isBlankIdent(e) { + return blank{} + } + obj := fn.Pkg.objectOf(e) + v := fn.Prog.packageLevelValue(obj) // var (address) + if v == nil { + v = fn.lookup(obj, escaping) + } + return &address{addr: v, pos: e.Pos(), expr: e} + + case *ast.CompositeLit: + t := deref(fn.Pkg.typeOf(e)) + var v *Alloc + if escaping { + v = emitNew(fn, t, e.Lbrace) + } else { + v = fn.addLocal(t, e.Lbrace) + } + v.Comment = "complit" + var sb storebuf + b.compLit(fn, v, e, true, &sb) + sb.emit(fn) + return &address{addr: v, pos: e.Lbrace, expr: e} + + case *ast.ParenExpr: + return b.addr(fn, e.X, escaping) + + case *ast.SelectorExpr: + sel, ok := fn.Pkg.info.Selections[e] + if !ok { + // qualified identifier + return b.addr(fn, e.Sel, escaping) + } + if sel.Kind() != types.FieldVal { + panic(sel) + } + wantAddr := true + v := b.receiver(fn, e.X, wantAddr, escaping, sel) + last := len(sel.Index()) - 1 + return &address{ + addr: emitFieldSelection(fn, v, sel.Index()[last], true, e.Sel), + pos: e.Sel.Pos(), + expr: e.Sel, + } + + case *ast.IndexExpr: + var x Value + var et types.Type + switch t := fn.Pkg.typeOf(e.X).Underlying().(type) { + case *types.Array: + x = b.addr(fn, e.X, escaping).address(fn) + et = types.NewPointer(t.Elem()) + case *types.Pointer: // *array + x = b.expr(fn, e.X) + et = types.NewPointer(t.Elem().Underlying().(*types.Array).Elem()) + case *types.Slice: + x = b.expr(fn, e.X) + et = types.NewPointer(t.Elem()) + case *types.Map: + return &element{ + m: b.expr(fn, e.X), + k: emitConv(fn, b.expr(fn, e.Index), t.Key()), + t: t.Elem(), + pos: e.Lbrack, + } + default: + panic("unexpected container type in IndexExpr: " + t.String()) + } + v := &IndexAddr{ + X: x, + Index: emitConv(fn, b.expr(fn, e.Index), tInt), + } + v.setPos(e.Lbrack) + v.setType(et) + return &address{addr: fn.emit(v), pos: e.Lbrack, expr: e} + + case *ast.StarExpr: + return &address{addr: b.expr(fn, e.X), pos: e.Star, expr: e} + } + + panic(fmt.Sprintf("unexpected address expression: %T", e)) +} + +type store struct { + lhs lvalue + rhs Value +} + +type storebuf struct{ stores []store } + +func (sb *storebuf) store(lhs lvalue, rhs Value) { + sb.stores = append(sb.stores, store{lhs, rhs}) +} + +func (sb *storebuf) emit(fn *Function) { + for _, s := range sb.stores { + s.lhs.store(fn, s.rhs) + } +} + +// assign emits to fn code to initialize the lvalue loc with the value +// of expression e. If isZero is true, assign assumes that loc holds +// the zero value for its type. +// +// This is equivalent to loc.store(fn, b.expr(fn, e)), but may generate +// better code in some cases, e.g., for composite literals in an +// addressable location. +// +// If sb is not nil, assign generates code to evaluate expression e, but +// not to update loc. Instead, the necessary stores are appended to the +// storebuf sb so that they can be executed later. This allows correct +// in-place update of existing variables when the RHS is a composite +// literal that may reference parts of the LHS. +// +func (b *builder) assign(fn *Function, loc lvalue, e ast.Expr, isZero bool, sb *storebuf) { + // Can we initialize it in place? + if e, ok := unparen(e).(*ast.CompositeLit); ok { + // A CompositeLit never evaluates to a pointer, + // so if the type of the location is a pointer, + // an &-operation is implied. + if _, ok := loc.(blank); !ok { // avoid calling blank.typ() + if isPointer(loc.typ()) { + ptr := b.addr(fn, e, true).address(fn) + // copy address + if sb != nil { + sb.store(loc, ptr) + } else { + loc.store(fn, ptr) + } + return + } + } + + if _, ok := loc.(*address); ok { + if isInterface(loc.typ()) { + // e.g. var x interface{} = T{...} + // Can't in-place initialize an interface value. + // Fall back to copying. + } else { + // x = T{...} or x := T{...} + addr := loc.address(fn) + if sb != nil { + b.compLit(fn, addr, e, isZero, sb) + } else { + var sb storebuf + b.compLit(fn, addr, e, isZero, &sb) + sb.emit(fn) + } + + // Subtle: emit debug ref for aggregate types only; + // slice and map are handled by store ops in compLit. + switch loc.typ().Underlying().(type) { + case *types.Struct, *types.Array: + emitDebugRef(fn, e, addr, true) + } + + return + } + } + } + + // simple case: just copy + rhs := b.expr(fn, e) + if sb != nil { + sb.store(loc, rhs) + } else { + loc.store(fn, rhs) + } +} + +// expr lowers a single-result expression e to SSA form, emitting code +// to fn and returning the Value defined by the expression. +// +func (b *builder) expr(fn *Function, e ast.Expr) Value { + e = unparen(e) + + tv := fn.Pkg.info.Types[e] + + // Is expression a constant? + if tv.Value != nil { + return NewConst(tv.Value, tv.Type) + } + + var v Value + if tv.Addressable() { + // Prefer pointer arithmetic ({Index,Field}Addr) followed + // by Load over subelement extraction (e.g. Index, Field), + // to avoid large copies. + v = b.addr(fn, e, false).load(fn) + } else { + v = b.expr0(fn, e, tv) + } + if fn.debugInfo() { + emitDebugRef(fn, e, v, false) + } + return v +} + +func (b *builder) expr0(fn *Function, e ast.Expr, tv types.TypeAndValue) Value { + switch e := e.(type) { + case *ast.BasicLit: + panic("non-constant BasicLit") // unreachable + + case *ast.FuncLit: + fn2 := &Function{ + name: fmt.Sprintf("%s$%d", fn.Name(), 1+len(fn.AnonFuncs)), + Signature: fn.Pkg.typeOf(e.Type).Underlying().(*types.Signature), + pos: e.Type.Func, + parent: fn, + Pkg: fn.Pkg, + Prog: fn.Prog, + syntax: e, + } + fn.AnonFuncs = append(fn.AnonFuncs, fn2) + b.buildFunction(fn2) + if fn2.FreeVars == nil { + return fn2 + } + v := &MakeClosure{Fn: fn2} + v.setType(tv.Type) + for _, fv := range fn2.FreeVars { + v.Bindings = append(v.Bindings, fv.outer) + fv.outer = nil + } + return fn.emit(v) + + case *ast.TypeAssertExpr: // single-result form only + return emitTypeAssert(fn, b.expr(fn, e.X), tv.Type, e.Lparen) + + case *ast.CallExpr: + if fn.Pkg.info.Types[e.Fun].IsType() { + // Explicit type conversion, e.g. string(x) or big.Int(x) + x := b.expr(fn, e.Args[0]) + y := emitConv(fn, x, tv.Type) + if y != x { + switch y := y.(type) { + case *Convert: + y.pos = e.Lparen + case *ChangeType: + y.pos = e.Lparen + case *MakeInterface: + y.pos = e.Lparen + } + } + return y + } + // Call to "intrinsic" built-ins, e.g. new, make, panic. + if id, ok := unparen(e.Fun).(*ast.Ident); ok { + if obj, ok := fn.Pkg.info.Uses[id].(*types.Builtin); ok { + if v := b.builtin(fn, obj, e.Args, tv.Type, e.Lparen); v != nil { + return v + } + } + } + // Regular function call. + var v Call + b.setCall(fn, e, &v.Call) + v.setType(tv.Type) + return fn.emit(&v) + + case *ast.UnaryExpr: + switch e.Op { + case token.AND: // &X --- potentially escaping. + addr := b.addr(fn, e.X, true) + if _, ok := unparen(e.X).(*ast.StarExpr); ok { + // &*p must panic if p is nil (http://golang.org/s/go12nil). + // For simplicity, we'll just (suboptimally) rely + // on the side effects of a load. + // TODO(adonovan): emit dedicated nilcheck. + addr.load(fn) + } + return addr.address(fn) + case token.ADD: + return b.expr(fn, e.X) + case token.NOT, token.ARROW, token.SUB, token.XOR: // ! <- - ^ + v := &UnOp{ + Op: e.Op, + X: b.expr(fn, e.X), + } + v.setPos(e.OpPos) + v.setType(tv.Type) + return fn.emit(v) + default: + panic(e.Op) + } + + case *ast.BinaryExpr: + switch e.Op { + case token.LAND, token.LOR: + return b.logicalBinop(fn, e) + case token.SHL, token.SHR: + fallthrough + case token.ADD, token.SUB, token.MUL, token.QUO, token.REM, token.AND, token.OR, token.XOR, token.AND_NOT: + return emitArith(fn, e.Op, b.expr(fn, e.X), b.expr(fn, e.Y), tv.Type, e.OpPos) + + case token.EQL, token.NEQ, token.GTR, token.LSS, token.LEQ, token.GEQ: + cmp := emitCompare(fn, e.Op, b.expr(fn, e.X), b.expr(fn, e.Y), e.OpPos) + // The type of x==y may be UntypedBool. + return emitConv(fn, cmp, DefaultType(tv.Type)) + default: + panic("illegal op in BinaryExpr: " + e.Op.String()) + } + + case *ast.SliceExpr: + var low, high, max Value + var x Value + switch fn.Pkg.typeOf(e.X).Underlying().(type) { + case *types.Array: + // Potentially escaping. + x = b.addr(fn, e.X, true).address(fn) + case *types.Basic, *types.Slice, *types.Pointer: // *array + x = b.expr(fn, e.X) + default: + panic("unreachable") + } + if e.High != nil { + high = b.expr(fn, e.High) + } + if e.Low != nil { + low = b.expr(fn, e.Low) + } + if e.Slice3 { + max = b.expr(fn, e.Max) + } + v := &Slice{ + X: x, + Low: low, + High: high, + Max: max, + } + v.setPos(e.Lbrack) + v.setType(tv.Type) + return fn.emit(v) + + case *ast.Ident: + obj := fn.Pkg.info.Uses[e] + // Universal built-in or nil? + switch obj := obj.(type) { + case *types.Builtin: + return &Builtin{name: obj.Name(), sig: tv.Type.(*types.Signature)} + case *types.Nil: + return nilConst(tv.Type) + } + // Package-level func or var? + if v := fn.Prog.packageLevelValue(obj); v != nil { + if _, ok := obj.(*types.Var); ok { + return emitLoad(fn, v) // var (address) + } + return v // (func) + } + // Local var. + return emitLoad(fn, fn.lookup(obj, false)) // var (address) + + case *ast.SelectorExpr: + sel, ok := fn.Pkg.info.Selections[e] + if !ok { + // qualified identifier + return b.expr(fn, e.Sel) + } + switch sel.Kind() { + case types.MethodExpr: + // (*T).f or T.f, the method f from the method-set of type T. + // The result is a "thunk". + return emitConv(fn, makeThunk(fn.Prog, sel), tv.Type) + + case types.MethodVal: + // e.f where e is an expression and f is a method. + // The result is a "bound". + obj := sel.Obj().(*types.Func) + rt := recvType(obj) + wantAddr := isPointer(rt) + escaping := true + v := b.receiver(fn, e.X, wantAddr, escaping, sel) + if isInterface(rt) { + // If v has interface type I, + // we must emit a check that v is non-nil. + // We use: typeassert v.(I). + emitTypeAssert(fn, v, rt, token.NoPos) + } + c := &MakeClosure{ + Fn: makeBound(fn.Prog, obj), + Bindings: []Value{v}, + } + c.setPos(e.Sel.Pos()) + c.setType(tv.Type) + return fn.emit(c) + + case types.FieldVal: + indices := sel.Index() + last := len(indices) - 1 + v := b.expr(fn, e.X) + v = emitImplicitSelections(fn, v, indices[:last]) + v = emitFieldSelection(fn, v, indices[last], false, e.Sel) + return v + } + + panic("unexpected expression-relative selector") + + case *ast.IndexExpr: + switch t := fn.Pkg.typeOf(e.X).Underlying().(type) { + case *types.Array: + // Non-addressable array (in a register). + v := &Index{ + X: b.expr(fn, e.X), + Index: emitConv(fn, b.expr(fn, e.Index), tInt), + } + v.setPos(e.Lbrack) + v.setType(t.Elem()) + return fn.emit(v) + + case *types.Map: + // Maps are not addressable. + mapt := fn.Pkg.typeOf(e.X).Underlying().(*types.Map) + v := &Lookup{ + X: b.expr(fn, e.X), + Index: emitConv(fn, b.expr(fn, e.Index), mapt.Key()), + } + v.setPos(e.Lbrack) + v.setType(mapt.Elem()) + return fn.emit(v) + + case *types.Basic: // => string + // Strings are not addressable. + v := &Lookup{ + X: b.expr(fn, e.X), + Index: b.expr(fn, e.Index), + } + v.setPos(e.Lbrack) + v.setType(tByte) + return fn.emit(v) + + case *types.Slice, *types.Pointer: // *array + // Addressable slice/array; use IndexAddr and Load. + return b.addr(fn, e, false).load(fn) + + default: + panic("unexpected container type in IndexExpr: " + t.String()) + } + + case *ast.CompositeLit, *ast.StarExpr: + // Addressable types (lvalues) + return b.addr(fn, e, false).load(fn) + } + + panic(fmt.Sprintf("unexpected expr: %T", e)) +} + +// stmtList emits to fn code for all statements in list. +func (b *builder) stmtList(fn *Function, list []ast.Stmt) { + for _, s := range list { + b.stmt(fn, s) + } +} + +// receiver emits to fn code for expression e in the "receiver" +// position of selection e.f (where f may be a field or a method) and +// returns the effective receiver after applying the implicit field +// selections of sel. +// +// wantAddr requests that the result is an an address. If +// !sel.Indirect(), this may require that e be built in addr() mode; it +// must thus be addressable. +// +// escaping is defined as per builder.addr(). +// +func (b *builder) receiver(fn *Function, e ast.Expr, wantAddr, escaping bool, sel *types.Selection) Value { + var v Value + if wantAddr && !sel.Indirect() && !isPointer(fn.Pkg.typeOf(e)) { + v = b.addr(fn, e, escaping).address(fn) + } else { + v = b.expr(fn, e) + } + + last := len(sel.Index()) - 1 + v = emitImplicitSelections(fn, v, sel.Index()[:last]) + if !wantAddr && isPointer(v.Type()) { + v = emitLoad(fn, v) + } + return v +} + +// setCallFunc populates the function parts of a CallCommon structure +// (Func, Method, Recv, Args[0]) based on the kind of invocation +// occurring in e. +// +func (b *builder) setCallFunc(fn *Function, e *ast.CallExpr, c *CallCommon) { + c.pos = e.Lparen + + // Is this a method call? + if selector, ok := unparen(e.Fun).(*ast.SelectorExpr); ok { + sel, ok := fn.Pkg.info.Selections[selector] + if ok && sel.Kind() == types.MethodVal { + obj := sel.Obj().(*types.Func) + recv := recvType(obj) + wantAddr := isPointer(recv) + escaping := true + v := b.receiver(fn, selector.X, wantAddr, escaping, sel) + if isInterface(recv) { + // Invoke-mode call. + c.Value = v + c.Method = obj + } else { + // "Call"-mode call. + c.Value = fn.Prog.declaredFunc(obj) + c.Args = append(c.Args, v) + } + return + } + + // sel.Kind()==MethodExpr indicates T.f() or (*T).f(): + // a statically dispatched call to the method f in the + // method-set of T or *T. T may be an interface. + // + // e.Fun would evaluate to a concrete method, interface + // wrapper function, or promotion wrapper. + // + // For now, we evaluate it in the usual way. + // + // TODO(adonovan): opt: inline expr() here, to make the + // call static and to avoid generation of wrappers. + // It's somewhat tricky as it may consume the first + // actual parameter if the call is "invoke" mode. + // + // Examples: + // type T struct{}; func (T) f() {} // "call" mode + // type T interface { f() } // "invoke" mode + // + // type S struct{ T } + // + // var s S + // S.f(s) + // (*S).f(&s) + // + // Suggested approach: + // - consume the first actual parameter expression + // and build it with b.expr(). + // - apply implicit field selections. + // - use MethodVal logic to populate fields of c. + } + + // Evaluate the function operand in the usual way. + c.Value = b.expr(fn, e.Fun) +} + +// emitCallArgs emits to f code for the actual parameters of call e to +// a (possibly built-in) function of effective type sig. +// The argument values are appended to args, which is then returned. +// +func (b *builder) emitCallArgs(fn *Function, sig *types.Signature, e *ast.CallExpr, args []Value) []Value { + // f(x, y, z...): pass slice z straight through. + if e.Ellipsis != 0 { + for i, arg := range e.Args { + v := emitConv(fn, b.expr(fn, arg), sig.Params().At(i).Type()) + args = append(args, v) + } + return args + } + + offset := len(args) // 1 if call has receiver, 0 otherwise + + // Evaluate actual parameter expressions. + // + // If this is a chained call of the form f(g()) where g has + // multiple return values (MRV), they are flattened out into + // args; a suffix of them may end up in a varargs slice. + for _, arg := range e.Args { + v := b.expr(fn, arg) + if ttuple, ok := v.Type().(*types.Tuple); ok { // MRV chain + for i, n := 0, ttuple.Len(); i < n; i++ { + args = append(args, emitExtract(fn, v, i)) + } + } else { + args = append(args, v) + } + } + + // Actual->formal assignability conversions for normal parameters. + np := sig.Params().Len() // number of normal parameters + if sig.Variadic() { + np-- + } + for i := 0; i < np; i++ { + args[offset+i] = emitConv(fn, args[offset+i], sig.Params().At(i).Type()) + } + + // Actual->formal assignability conversions for variadic parameter, + // and construction of slice. + if sig.Variadic() { + varargs := args[offset+np:] + st := sig.Params().At(np).Type().(*types.Slice) + vt := st.Elem() + if len(varargs) == 0 { + args = append(args, nilConst(st)) + } else { + // Replace a suffix of args with a slice containing it. + at := types.NewArray(vt, int64(len(varargs))) + a := emitNew(fn, at, token.NoPos) + a.setPos(e.Rparen) + a.Comment = "varargs" + for i, arg := range varargs { + iaddr := &IndexAddr{ + X: a, + Index: intConst(int64(i)), + } + iaddr.setType(types.NewPointer(vt)) + fn.emit(iaddr) + emitStore(fn, iaddr, arg, arg.Pos()) + } + s := &Slice{X: a} + s.setType(st) + args[offset+np] = fn.emit(s) + args = args[:offset+np+1] + } + } + return args +} + +// setCall emits to fn code to evaluate all the parameters of a function +// call e, and populates *c with those values. +// +func (b *builder) setCall(fn *Function, e *ast.CallExpr, c *CallCommon) { + // First deal with the f(...) part and optional receiver. + b.setCallFunc(fn, e, c) + + // Then append the other actual parameters. + sig, _ := fn.Pkg.typeOf(e.Fun).Underlying().(*types.Signature) + if sig == nil { + panic(fmt.Sprintf("no signature for call of %s", e.Fun)) + } + c.Args = b.emitCallArgs(fn, sig, e, c.Args) +} + +// assignOp emits to fn code to perform loc += incr or loc -= incr. +func (b *builder) assignOp(fn *Function, loc lvalue, incr Value, op token.Token) { + oldv := loc.load(fn) + loc.store(fn, emitArith(fn, op, oldv, emitConv(fn, incr, oldv.Type()), loc.typ(), token.NoPos)) +} + +// localValueSpec emits to fn code to define all of the vars in the +// function-local ValueSpec, spec. +// +func (b *builder) localValueSpec(fn *Function, spec *ast.ValueSpec) { + switch { + case len(spec.Values) == len(spec.Names): + // e.g. var x, y = 0, 1 + // 1:1 assignment + for i, id := range spec.Names { + if !isBlankIdent(id) { + fn.addLocalForIdent(id) + } + lval := b.addr(fn, id, false) // non-escaping + b.assign(fn, lval, spec.Values[i], true, nil) + } + + case len(spec.Values) == 0: + // e.g. var x, y int + // Locals are implicitly zero-initialized. + for _, id := range spec.Names { + if !isBlankIdent(id) { + lhs := fn.addLocalForIdent(id) + if fn.debugInfo() { + emitDebugRef(fn, id, lhs, true) + } + } + } + + default: + // e.g. var x, y = pos() + tuple := b.exprN(fn, spec.Values[0]) + for i, id := range spec.Names { + if !isBlankIdent(id) { + fn.addLocalForIdent(id) + lhs := b.addr(fn, id, false) // non-escaping + lhs.store(fn, emitExtract(fn, tuple, i)) + } + } + } +} + +// assignStmt emits code to fn for a parallel assignment of rhss to lhss. +// isDef is true if this is a short variable declaration (:=). +// +// Note the similarity with localValueSpec. +// +func (b *builder) assignStmt(fn *Function, lhss, rhss []ast.Expr, isDef bool) { + // Side effects of all LHSs and RHSs must occur in left-to-right order. + lvals := make([]lvalue, len(lhss)) + isZero := make([]bool, len(lhss)) + for i, lhs := range lhss { + var lval lvalue = blank{} + if !isBlankIdent(lhs) { + if isDef { + if obj := fn.Pkg.info.Defs[lhs.(*ast.Ident)]; obj != nil { + fn.addNamedLocal(obj) + isZero[i] = true + } + } + lval = b.addr(fn, lhs, false) // non-escaping + } + lvals[i] = lval + } + if len(lhss) == len(rhss) { + // Simple assignment: x = f() (!isDef) + // Parallel assignment: x, y = f(), g() (!isDef) + // or short var decl: x, y := f(), g() (isDef) + // + // In all cases, the RHSs may refer to the LHSs, + // so we need a storebuf. + var sb storebuf + for i := range rhss { + b.assign(fn, lvals[i], rhss[i], isZero[i], &sb) + } + sb.emit(fn) + } else { + // e.g. x, y = pos() + tuple := b.exprN(fn, rhss[0]) + for i, lval := range lvals { + lval.store(fn, emitExtract(fn, tuple, i)) + } + } +} + +// arrayLen returns the length of the array whose composite literal elements are elts. +func (b *builder) arrayLen(fn *Function, elts []ast.Expr) int64 { + var max int64 = -1 + var i int64 = -1 + for _, e := range elts { + if kv, ok := e.(*ast.KeyValueExpr); ok { + i = b.expr(fn, kv.Key).(*Const).Int64() + } else { + i++ + } + if i > max { + max = i + } + } + return max + 1 +} + +// compLit emits to fn code to initialize a composite literal e at +// address addr with type typ. +// +// Nested composite literals are recursively initialized in place +// where possible. If isZero is true, compLit assumes that addr +// holds the zero value for typ. +// +// Because the elements of a composite literal may refer to the +// variables being updated, as in the second line below, +// x := T{a: 1} +// x = T{a: x.a} +// all the reads must occur before all the writes. Thus all stores to +// loc are emitted to the storebuf sb for later execution. +// +// A CompositeLit may have pointer type only in the recursive (nested) +// case when the type name is implicit. e.g. in []*T{{}}, the inner +// literal has type *T behaves like &T{}. +// In that case, addr must hold a T, not a *T. +// +func (b *builder) compLit(fn *Function, addr Value, e *ast.CompositeLit, isZero bool, sb *storebuf) { + typ := deref(fn.Pkg.typeOf(e)) + switch t := typ.Underlying().(type) { + case *types.Struct: + if !isZero && len(e.Elts) != t.NumFields() { + // memclear + sb.store(&address{addr, e.Lbrace, nil}, + zeroValue(fn, deref(addr.Type()))) + isZero = true + } + for i, e := range e.Elts { + fieldIndex := i + pos := e.Pos() + if kv, ok := e.(*ast.KeyValueExpr); ok { + fname := kv.Key.(*ast.Ident).Name + for i, n := 0, t.NumFields(); i < n; i++ { + sf := t.Field(i) + if sf.Name() == fname { + fieldIndex = i + pos = kv.Colon + e = kv.Value + break + } + } + } + sf := t.Field(fieldIndex) + faddr := &FieldAddr{ + X: addr, + Field: fieldIndex, + } + faddr.setType(types.NewPointer(sf.Type())) + fn.emit(faddr) + b.assign(fn, &address{addr: faddr, pos: pos, expr: e}, e, isZero, sb) + } + + case *types.Array, *types.Slice: + var at *types.Array + var array Value + switch t := t.(type) { + case *types.Slice: + at = types.NewArray(t.Elem(), b.arrayLen(fn, e.Elts)) + alloc := emitNew(fn, at, e.Lbrace) + alloc.Comment = "slicelit" + array = alloc + case *types.Array: + at = t + array = addr + + if !isZero && int64(len(e.Elts)) != at.Len() { + // memclear + sb.store(&address{array, e.Lbrace, nil}, + zeroValue(fn, deref(array.Type()))) + } + } + + var idx *Const + for _, e := range e.Elts { + pos := e.Pos() + if kv, ok := e.(*ast.KeyValueExpr); ok { + idx = b.expr(fn, kv.Key).(*Const) + pos = kv.Colon + e = kv.Value + } else { + var idxval int64 + if idx != nil { + idxval = idx.Int64() + 1 + } + idx = intConst(idxval) + } + iaddr := &IndexAddr{ + X: array, + Index: idx, + } + iaddr.setType(types.NewPointer(at.Elem())) + fn.emit(iaddr) + if t != at { // slice + // backing array is unaliased => storebuf not needed. + b.assign(fn, &address{addr: iaddr, pos: pos, expr: e}, e, true, nil) + } else { + b.assign(fn, &address{addr: iaddr, pos: pos, expr: e}, e, true, sb) + } + } + + if t != at { // slice + s := &Slice{X: array} + s.setPos(e.Lbrace) + s.setType(typ) + sb.store(&address{addr: addr, pos: e.Lbrace, expr: e}, fn.emit(s)) + } + + case *types.Map: + m := &MakeMap{Reserve: intConst(int64(len(e.Elts)))} + m.setPos(e.Lbrace) + m.setType(typ) + fn.emit(m) + for _, e := range e.Elts { + e := e.(*ast.KeyValueExpr) + loc := element{ + m: m, + k: emitConv(fn, b.expr(fn, e.Key), t.Key()), + t: t.Elem(), + pos: e.Colon, + } + + // We call assign() only because it takes care + // of any &-operation required in the recursive + // case, e.g., + // map[int]*struct{}{0: {}} implies &struct{}{}. + // In-place update is of course impossible, + // and no storebuf is needed. + b.assign(fn, &loc, e.Value, true, nil) + } + sb.store(&address{addr: addr, pos: e.Lbrace, expr: e}, m) + + default: + panic("unexpected CompositeLit type: " + t.String()) + } +} + +// switchStmt emits to fn code for the switch statement s, optionally +// labelled by label. +// +func (b *builder) switchStmt(fn *Function, s *ast.SwitchStmt, label *lblock) { + // We treat SwitchStmt like a sequential if-else chain. + // Multiway dispatch can be recovered later by ssautil.Switches() + // to those cases that are free of side effects. + if s.Init != nil { + b.stmt(fn, s.Init) + } + var tag Value = vTrue + if s.Tag != nil { + tag = b.expr(fn, s.Tag) + } + done := fn.newBasicBlock("switch.done") + if label != nil { + label._break = done + } + // We pull the default case (if present) down to the end. + // But each fallthrough label must point to the next + // body block in source order, so we preallocate a + // body block (fallthru) for the next case. + // Unfortunately this makes for a confusing block order. + var dfltBody *[]ast.Stmt + var dfltFallthrough *BasicBlock + var fallthru, dfltBlock *BasicBlock + ncases := len(s.Body.List) + for i, clause := range s.Body.List { + body := fallthru + if body == nil { + body = fn.newBasicBlock("switch.body") // first case only + } + + // Preallocate body block for the next case. + fallthru = done + if i+1 < ncases { + fallthru = fn.newBasicBlock("switch.body") + } + + cc := clause.(*ast.CaseClause) + if cc.List == nil { + // Default case. + dfltBody = &cc.Body + dfltFallthrough = fallthru + dfltBlock = body + continue + } + + var nextCond *BasicBlock + for _, cond := range cc.List { + nextCond = fn.newBasicBlock("switch.next") + // TODO(adonovan): opt: when tag==vTrue, we'd + // get better code if we use b.cond(cond) + // instead of BinOp(EQL, tag, b.expr(cond)) + // followed by If. Don't forget conversions + // though. + cond := emitCompare(fn, token.EQL, tag, b.expr(fn, cond), token.NoPos) + emitIf(fn, cond, body, nextCond) + fn.currentBlock = nextCond + } + fn.currentBlock = body + fn.targets = &targets{ + tail: fn.targets, + _break: done, + _fallthrough: fallthru, + } + b.stmtList(fn, cc.Body) + fn.targets = fn.targets.tail + emitJump(fn, done) + fn.currentBlock = nextCond + } + if dfltBlock != nil { + emitJump(fn, dfltBlock) + fn.currentBlock = dfltBlock + fn.targets = &targets{ + tail: fn.targets, + _break: done, + _fallthrough: dfltFallthrough, + } + b.stmtList(fn, *dfltBody) + fn.targets = fn.targets.tail + } + emitJump(fn, done) + fn.currentBlock = done +} + +// typeSwitchStmt emits to fn code for the type switch statement s, optionally +// labelled by label. +// +func (b *builder) typeSwitchStmt(fn *Function, s *ast.TypeSwitchStmt, label *lblock) { + // We treat TypeSwitchStmt like a sequential if-else chain. + // Multiway dispatch can be recovered later by ssautil.Switches(). + + // Typeswitch lowering: + // + // var x X + // switch y := x.(type) { + // case T1, T2: S1 // >1 (y := x) + // case nil: SN // nil (y := x) + // default: SD // 0 types (y := x) + // case T3: S3 // 1 type (y := x.(T3)) + // } + // + // ...s.Init... + // x := eval x + // .caseT1: + // t1, ok1 := typeswitch,ok x + // if ok1 then goto S1 else goto .caseT2 + // .caseT2: + // t2, ok2 := typeswitch,ok x + // if ok2 then goto S1 else goto .caseNil + // .S1: + // y := x + // ...S1... + // goto done + // .caseNil: + // if t2, ok2 := typeswitch,ok x + // if x == nil then goto SN else goto .caseT3 + // .SN: + // y := x + // ...SN... + // goto done + // .caseT3: + // t3, ok3 := typeswitch,ok x + // if ok3 then goto S3 else goto default + // .S3: + // y := t3 + // ...S3... + // goto done + // .default: + // y := x + // ...SD... + // goto done + // .done: + + if s.Init != nil { + b.stmt(fn, s.Init) + } + + var x Value + switch ass := s.Assign.(type) { + case *ast.ExprStmt: // x.(type) + x = b.expr(fn, unparen(ass.X).(*ast.TypeAssertExpr).X) + case *ast.AssignStmt: // y := x.(type) + x = b.expr(fn, unparen(ass.Rhs[0]).(*ast.TypeAssertExpr).X) + } + + done := fn.newBasicBlock("typeswitch.done") + if label != nil { + label._break = done + } + var default_ *ast.CaseClause + for _, clause := range s.Body.List { + cc := clause.(*ast.CaseClause) + if cc.List == nil { + default_ = cc + continue + } + body := fn.newBasicBlock("typeswitch.body") + var next *BasicBlock + var casetype types.Type + var ti Value // ti, ok := typeassert,ok x + for _, cond := range cc.List { + next = fn.newBasicBlock("typeswitch.next") + casetype = fn.Pkg.typeOf(cond) + var condv Value + if casetype == tUntypedNil { + condv = emitCompare(fn, token.EQL, x, nilConst(x.Type()), token.NoPos) + ti = x + } else { + yok := emitTypeTest(fn, x, casetype, cc.Case) + ti = emitExtract(fn, yok, 0) + condv = emitExtract(fn, yok, 1) + } + emitIf(fn, condv, body, next) + fn.currentBlock = next + } + if len(cc.List) != 1 { + ti = x + } + fn.currentBlock = body + b.typeCaseBody(fn, cc, ti, done) + fn.currentBlock = next + } + if default_ != nil { + b.typeCaseBody(fn, default_, x, done) + } else { + emitJump(fn, done) + } + fn.currentBlock = done +} + +func (b *builder) typeCaseBody(fn *Function, cc *ast.CaseClause, x Value, done *BasicBlock) { + if obj := fn.Pkg.info.Implicits[cc]; obj != nil { + // In a switch y := x.(type), each case clause + // implicitly declares a distinct object y. + // In a single-type case, y has that type. + // In multi-type cases, 'case nil' and default, + // y has the same type as the interface operand. + emitStore(fn, fn.addNamedLocal(obj), x, obj.Pos()) + } + fn.targets = &targets{ + tail: fn.targets, + _break: done, + } + b.stmtList(fn, cc.Body) + fn.targets = fn.targets.tail + emitJump(fn, done) +} + +// selectStmt emits to fn code for the select statement s, optionally +// labelled by label. +// +func (b *builder) selectStmt(fn *Function, s *ast.SelectStmt, label *lblock) { + // A blocking select of a single case degenerates to a + // simple send or receive. + // TODO(adonovan): opt: is this optimization worth its weight? + if len(s.Body.List) == 1 { + clause := s.Body.List[0].(*ast.CommClause) + if clause.Comm != nil { + b.stmt(fn, clause.Comm) + done := fn.newBasicBlock("select.done") + if label != nil { + label._break = done + } + fn.targets = &targets{ + tail: fn.targets, + _break: done, + } + b.stmtList(fn, clause.Body) + fn.targets = fn.targets.tail + emitJump(fn, done) + fn.currentBlock = done + return + } + } + + // First evaluate all channels in all cases, and find + // the directions of each state. + var states []*SelectState + blocking := true + debugInfo := fn.debugInfo() + for _, clause := range s.Body.List { + var st *SelectState + switch comm := clause.(*ast.CommClause).Comm.(type) { + case nil: // default case + blocking = false + continue + + case *ast.SendStmt: // ch<- i + ch := b.expr(fn, comm.Chan) + st = &SelectState{ + Dir: types.SendOnly, + Chan: ch, + Send: emitConv(fn, b.expr(fn, comm.Value), + ch.Type().Underlying().(*types.Chan).Elem()), + Pos: comm.Arrow, + } + if debugInfo { + st.DebugNode = comm + } + + case *ast.AssignStmt: // x := <-ch + recv := unparen(comm.Rhs[0]).(*ast.UnaryExpr) + st = &SelectState{ + Dir: types.RecvOnly, + Chan: b.expr(fn, recv.X), + Pos: recv.OpPos, + } + if debugInfo { + st.DebugNode = recv + } + + case *ast.ExprStmt: // <-ch + recv := unparen(comm.X).(*ast.UnaryExpr) + st = &SelectState{ + Dir: types.RecvOnly, + Chan: b.expr(fn, recv.X), + Pos: recv.OpPos, + } + if debugInfo { + st.DebugNode = recv + } + } + states = append(states, st) + } + + // We dispatch on the (fair) result of Select using a + // sequential if-else chain, in effect: + // + // idx, recvOk, r0...r_n-1 := select(...) + // if idx == 0 { // receive on channel 0 (first receive => r0) + // x, ok := r0, recvOk + // ...state0... + // } else if v == 1 { // send on channel 1 + // ...state1... + // } else { + // ...default... + // } + sel := &Select{ + States: states, + Blocking: blocking, + } + sel.setPos(s.Select) + var vars []*types.Var + vars = append(vars, varIndex, varOk) + for _, st := range states { + if st.Dir == types.RecvOnly { + tElem := st.Chan.Type().Underlying().(*types.Chan).Elem() + vars = append(vars, anonVar(tElem)) + } + } + sel.setType(types.NewTuple(vars...)) + + fn.emit(sel) + idx := emitExtract(fn, sel, 0) + + done := fn.newBasicBlock("select.done") + if label != nil { + label._break = done + } + + var defaultBody *[]ast.Stmt + state := 0 + r := 2 // index in 'sel' tuple of value; increments if st.Dir==RECV + for _, cc := range s.Body.List { + clause := cc.(*ast.CommClause) + if clause.Comm == nil { + defaultBody = &clause.Body + continue + } + body := fn.newBasicBlock("select.body") + next := fn.newBasicBlock("select.next") + emitIf(fn, emitCompare(fn, token.EQL, idx, intConst(int64(state)), token.NoPos), body, next) + fn.currentBlock = body + fn.targets = &targets{ + tail: fn.targets, + _break: done, + } + switch comm := clause.Comm.(type) { + case *ast.ExprStmt: // <-ch + if debugInfo { + v := emitExtract(fn, sel, r) + emitDebugRef(fn, states[state].DebugNode.(ast.Expr), v, false) + } + r++ + + case *ast.AssignStmt: // x := <-states[state].Chan + if comm.Tok == token.DEFINE { + fn.addLocalForIdent(comm.Lhs[0].(*ast.Ident)) + } + x := b.addr(fn, comm.Lhs[0], false) // non-escaping + v := emitExtract(fn, sel, r) + if debugInfo { + emitDebugRef(fn, states[state].DebugNode.(ast.Expr), v, false) + } + x.store(fn, v) + + if len(comm.Lhs) == 2 { // x, ok := ... + if comm.Tok == token.DEFINE { + fn.addLocalForIdent(comm.Lhs[1].(*ast.Ident)) + } + ok := b.addr(fn, comm.Lhs[1], false) // non-escaping + ok.store(fn, emitExtract(fn, sel, 1)) + } + r++ + } + b.stmtList(fn, clause.Body) + fn.targets = fn.targets.tail + emitJump(fn, done) + fn.currentBlock = next + state++ + } + if defaultBody != nil { + fn.targets = &targets{ + tail: fn.targets, + _break: done, + } + b.stmtList(fn, *defaultBody) + fn.targets = fn.targets.tail + } else { + // A blocking select must match some case. + // (This should really be a runtime.errorString, not a string.) + fn.emit(&Panic{ + X: emitConv(fn, stringConst("blocking select matched no case"), tEface), + }) + fn.currentBlock = fn.newBasicBlock("unreachable") + } + emitJump(fn, done) + fn.currentBlock = done +} + +// forStmt emits to fn code for the for statement s, optionally +// labelled by label. +// +func (b *builder) forStmt(fn *Function, s *ast.ForStmt, label *lblock) { + // ...init... + // jump loop + // loop: + // if cond goto body else done + // body: + // ...body... + // jump post + // post: (target of continue) + // ...post... + // jump loop + // done: (target of break) + if s.Init != nil { + b.stmt(fn, s.Init) + } + body := fn.newBasicBlock("for.body") + done := fn.newBasicBlock("for.done") // target of 'break' + loop := body // target of back-edge + if s.Cond != nil { + loop = fn.newBasicBlock("for.loop") + } + cont := loop // target of 'continue' + if s.Post != nil { + cont = fn.newBasicBlock("for.post") + } + if label != nil { + label._break = done + label._continue = cont + } + emitJump(fn, loop) + fn.currentBlock = loop + if loop != body { + b.cond(fn, s.Cond, body, done) + fn.currentBlock = body + } + fn.targets = &targets{ + tail: fn.targets, + _break: done, + _continue: cont, + } + b.stmt(fn, s.Body) + fn.targets = fn.targets.tail + emitJump(fn, cont) + + if s.Post != nil { + fn.currentBlock = cont + b.stmt(fn, s.Post) + emitJump(fn, loop) // back-edge + } + fn.currentBlock = done +} + +// rangeIndexed emits to fn the header for an integer-indexed loop +// over array, *array or slice value x. +// The v result is defined only if tv is non-nil. +// forPos is the position of the "for" token. +// +func (b *builder) rangeIndexed(fn *Function, x Value, tv types.Type, pos token.Pos) (k, v Value, loop, done *BasicBlock) { + // + // length = len(x) + // index = -1 + // loop: (target of continue) + // index++ + // if index < length goto body else done + // body: + // k = index + // v = x[index] + // ...body... + // jump loop + // done: (target of break) + + // Determine number of iterations. + var length Value + if arr, ok := deref(x.Type()).Underlying().(*types.Array); ok { + // For array or *array, the number of iterations is + // known statically thanks to the type. We avoid a + // data dependence upon x, permitting later dead-code + // elimination if x is pure, static unrolling, etc. + // Ranging over a nil *array may have >0 iterations. + // We still generate code for x, in case it has effects. + length = intConst(arr.Len()) + } else { + // length = len(x). + var c Call + c.Call.Value = makeLen(x.Type()) + c.Call.Args = []Value{x} + c.setType(tInt) + length = fn.emit(&c) + } + + index := fn.addLocal(tInt, token.NoPos) + emitStore(fn, index, intConst(-1), pos) + + loop = fn.newBasicBlock("rangeindex.loop") + emitJump(fn, loop) + fn.currentBlock = loop + + incr := &BinOp{ + Op: token.ADD, + X: emitLoad(fn, index), + Y: vOne, + } + incr.setType(tInt) + emitStore(fn, index, fn.emit(incr), pos) + + body := fn.newBasicBlock("rangeindex.body") + done = fn.newBasicBlock("rangeindex.done") + emitIf(fn, emitCompare(fn, token.LSS, incr, length, token.NoPos), body, done) + fn.currentBlock = body + + k = emitLoad(fn, index) + if tv != nil { + switch t := x.Type().Underlying().(type) { + case *types.Array: + instr := &Index{ + X: x, + Index: k, + } + instr.setType(t.Elem()) + v = fn.emit(instr) + + case *types.Pointer: // *array + instr := &IndexAddr{ + X: x, + Index: k, + } + instr.setType(types.NewPointer(t.Elem().Underlying().(*types.Array).Elem())) + v = emitLoad(fn, fn.emit(instr)) + + case *types.Slice: + instr := &IndexAddr{ + X: x, + Index: k, + } + instr.setType(types.NewPointer(t.Elem())) + v = emitLoad(fn, fn.emit(instr)) + + default: + panic("rangeIndexed x:" + t.String()) + } + } + return +} + +// rangeIter emits to fn the header for a loop using +// Range/Next/Extract to iterate over map or string value x. +// tk and tv are the types of the key/value results k and v, or nil +// if the respective component is not wanted. +// +func (b *builder) rangeIter(fn *Function, x Value, tk, tv types.Type, pos token.Pos) (k, v Value, loop, done *BasicBlock) { + // + // it = range x + // loop: (target of continue) + // okv = next it (ok, key, value) + // ok = extract okv #0 + // if ok goto body else done + // body: + // k = extract okv #1 + // v = extract okv #2 + // ...body... + // jump loop + // done: (target of break) + // + + if tk == nil { + tk = tInvalid + } + if tv == nil { + tv = tInvalid + } + + rng := &Range{X: x} + rng.setPos(pos) + rng.setType(tRangeIter) + it := fn.emit(rng) + + loop = fn.newBasicBlock("rangeiter.loop") + emitJump(fn, loop) + fn.currentBlock = loop + + _, isString := x.Type().Underlying().(*types.Basic) + + okv := &Next{ + Iter: it, + IsString: isString, + } + okv.setType(types.NewTuple( + varOk, + newVar("k", tk), + newVar("v", tv), + )) + fn.emit(okv) + + body := fn.newBasicBlock("rangeiter.body") + done = fn.newBasicBlock("rangeiter.done") + emitIf(fn, emitExtract(fn, okv, 0), body, done) + fn.currentBlock = body + + if tk != tInvalid { + k = emitExtract(fn, okv, 1) + } + if tv != tInvalid { + v = emitExtract(fn, okv, 2) + } + return +} + +// rangeChan emits to fn the header for a loop that receives from +// channel x until it fails. +// tk is the channel's element type, or nil if the k result is +// not wanted +// pos is the position of the '=' or ':=' token. +// +func (b *builder) rangeChan(fn *Function, x Value, tk types.Type, pos token.Pos) (k Value, loop, done *BasicBlock) { + // + // loop: (target of continue) + // ko = <-x (key, ok) + // ok = extract ko #1 + // if ok goto body else done + // body: + // k = extract ko #0 + // ... + // goto loop + // done: (target of break) + + loop = fn.newBasicBlock("rangechan.loop") + emitJump(fn, loop) + fn.currentBlock = loop + recv := &UnOp{ + Op: token.ARROW, + X: x, + CommaOk: true, + } + recv.setPos(pos) + recv.setType(types.NewTuple( + newVar("k", x.Type().Underlying().(*types.Chan).Elem()), + varOk, + )) + ko := fn.emit(recv) + body := fn.newBasicBlock("rangechan.body") + done = fn.newBasicBlock("rangechan.done") + emitIf(fn, emitExtract(fn, ko, 1), body, done) + fn.currentBlock = body + if tk != nil { + k = emitExtract(fn, ko, 0) + } + return +} + +// rangeStmt emits to fn code for the range statement s, optionally +// labelled by label. +// +func (b *builder) rangeStmt(fn *Function, s *ast.RangeStmt, label *lblock) { + var tk, tv types.Type + if s.Key != nil && !isBlankIdent(s.Key) { + tk = fn.Pkg.typeOf(s.Key) + } + if s.Value != nil && !isBlankIdent(s.Value) { + tv = fn.Pkg.typeOf(s.Value) + } + + // If iteration variables are defined (:=), this + // occurs once outside the loop. + // + // Unlike a short variable declaration, a RangeStmt + // using := never redeclares an existing variable; it + // always creates a new one. + if s.Tok == token.DEFINE { + if tk != nil { + fn.addLocalForIdent(s.Key.(*ast.Ident)) + } + if tv != nil { + fn.addLocalForIdent(s.Value.(*ast.Ident)) + } + } + + x := b.expr(fn, s.X) + + var k, v Value + var loop, done *BasicBlock + switch rt := x.Type().Underlying().(type) { + case *types.Slice, *types.Array, *types.Pointer: // *array + k, v, loop, done = b.rangeIndexed(fn, x, tv, s.For) + + case *types.Chan: + k, loop, done = b.rangeChan(fn, x, tk, s.For) + + case *types.Map, *types.Basic: // string + k, v, loop, done = b.rangeIter(fn, x, tk, tv, s.For) + + default: + panic("Cannot range over: " + rt.String()) + } + + // Evaluate both LHS expressions before we update either. + var kl, vl lvalue + if tk != nil { + kl = b.addr(fn, s.Key, false) // non-escaping + } + if tv != nil { + vl = b.addr(fn, s.Value, false) // non-escaping + } + if tk != nil { + kl.store(fn, k) + } + if tv != nil { + vl.store(fn, v) + } + + if label != nil { + label._break = done + label._continue = loop + } + + fn.targets = &targets{ + tail: fn.targets, + _break: done, + _continue: loop, + } + b.stmt(fn, s.Body) + fn.targets = fn.targets.tail + emitJump(fn, loop) // back-edge + fn.currentBlock = done +} + +// stmt lowers statement s to SSA form, emitting code to fn. +func (b *builder) stmt(fn *Function, _s ast.Stmt) { + // The label of the current statement. If non-nil, its _goto + // target is always set; its _break and _continue are set only + // within the body of switch/typeswitch/select/for/range. + // It is effectively an additional default-nil parameter of stmt(). + var label *lblock +start: + switch s := _s.(type) { + case *ast.EmptyStmt: + // ignore. (Usually removed by gofmt.) + + case *ast.DeclStmt: // Con, Var or Typ + d := s.Decl.(*ast.GenDecl) + if d.Tok == token.VAR { + for _, spec := range d.Specs { + if vs, ok := spec.(*ast.ValueSpec); ok { + b.localValueSpec(fn, vs) + } + } + } + + case *ast.LabeledStmt: + label = fn.labelledBlock(s.Label) + emitJump(fn, label._goto) + fn.currentBlock = label._goto + _s = s.Stmt + goto start // effectively: tailcall stmt(fn, s.Stmt, label) + + case *ast.ExprStmt: + b.expr(fn, s.X) + + case *ast.SendStmt: + fn.emit(&Send{ + Chan: b.expr(fn, s.Chan), + X: emitConv(fn, b.expr(fn, s.Value), + fn.Pkg.typeOf(s.Chan).Underlying().(*types.Chan).Elem()), + pos: s.Arrow, + }) + + case *ast.IncDecStmt: + op := token.ADD + if s.Tok == token.DEC { + op = token.SUB + } + loc := b.addr(fn, s.X, false) + b.assignOp(fn, loc, NewConst(exact.MakeInt64(1), loc.typ()), op) + + case *ast.AssignStmt: + switch s.Tok { + case token.ASSIGN, token.DEFINE: + b.assignStmt(fn, s.Lhs, s.Rhs, s.Tok == token.DEFINE) + + default: // +=, etc. + op := s.Tok + token.ADD - token.ADD_ASSIGN + b.assignOp(fn, b.addr(fn, s.Lhs[0], false), b.expr(fn, s.Rhs[0]), op) + } + + case *ast.GoStmt: + // The "intrinsics" new/make/len/cap are forbidden here. + // panic is treated like an ordinary function call. + v := Go{pos: s.Go} + b.setCall(fn, s.Call, &v.Call) + fn.emit(&v) + + case *ast.DeferStmt: + // The "intrinsics" new/make/len/cap are forbidden here. + // panic is treated like an ordinary function call. + v := Defer{pos: s.Defer} + b.setCall(fn, s.Call, &v.Call) + fn.emit(&v) + + // A deferred call can cause recovery from panic, + // and control resumes at the Recover block. + createRecoverBlock(fn) + + case *ast.ReturnStmt: + var results []Value + if len(s.Results) == 1 && fn.Signature.Results().Len() > 1 { + // Return of one expression in a multi-valued function. + tuple := b.exprN(fn, s.Results[0]) + ttuple := tuple.Type().(*types.Tuple) + for i, n := 0, ttuple.Len(); i < n; i++ { + results = append(results, + emitConv(fn, emitExtract(fn, tuple, i), + fn.Signature.Results().At(i).Type())) + } + } else { + // 1:1 return, or no-arg return in non-void function. + for i, r := range s.Results { + v := emitConv(fn, b.expr(fn, r), fn.Signature.Results().At(i).Type()) + results = append(results, v) + } + } + if fn.namedResults != nil { + // Function has named result parameters (NRPs). + // Perform parallel assignment of return operands to NRPs. + for i, r := range results { + emitStore(fn, fn.namedResults[i], r, s.Return) + } + } + // Run function calls deferred in this + // function when explicitly returning from it. + fn.emit(new(RunDefers)) + if fn.namedResults != nil { + // Reload NRPs to form the result tuple. + results = results[:0] + for _, r := range fn.namedResults { + results = append(results, emitLoad(fn, r)) + } + } + fn.emit(&Return{Results: results, pos: s.Return}) + fn.currentBlock = fn.newBasicBlock("unreachable") + + case *ast.BranchStmt: + var block *BasicBlock + switch s.Tok { + case token.BREAK: + if s.Label != nil { + block = fn.labelledBlock(s.Label)._break + } else { + for t := fn.targets; t != nil && block == nil; t = t.tail { + block = t._break + } + } + + case token.CONTINUE: + if s.Label != nil { + block = fn.labelledBlock(s.Label)._continue + } else { + for t := fn.targets; t != nil && block == nil; t = t.tail { + block = t._continue + } + } + + case token.FALLTHROUGH: + for t := fn.targets; t != nil && block == nil; t = t.tail { + block = t._fallthrough + } + + case token.GOTO: + block = fn.labelledBlock(s.Label)._goto + } + emitJump(fn, block) + fn.currentBlock = fn.newBasicBlock("unreachable") + + case *ast.BlockStmt: + b.stmtList(fn, s.List) + + case *ast.IfStmt: + if s.Init != nil { + b.stmt(fn, s.Init) + } + then := fn.newBasicBlock("if.then") + done := fn.newBasicBlock("if.done") + els := done + if s.Else != nil { + els = fn.newBasicBlock("if.else") + } + b.cond(fn, s.Cond, then, els) + fn.currentBlock = then + b.stmt(fn, s.Body) + emitJump(fn, done) + + if s.Else != nil { + fn.currentBlock = els + b.stmt(fn, s.Else) + emitJump(fn, done) + } + + fn.currentBlock = done + + case *ast.SwitchStmt: + b.switchStmt(fn, s, label) + + case *ast.TypeSwitchStmt: + b.typeSwitchStmt(fn, s, label) + + case *ast.SelectStmt: + b.selectStmt(fn, s, label) + + case *ast.ForStmt: + b.forStmt(fn, s, label) + + case *ast.RangeStmt: + b.rangeStmt(fn, s, label) + + default: + panic(fmt.Sprintf("unexpected statement kind: %T", s)) + } +} + +// buildFunction builds SSA code for the body of function fn. Idempotent. +func (b *builder) buildFunction(fn *Function) { + if fn.Blocks != nil { + return // building already started + } + + var recvField *ast.FieldList + var body *ast.BlockStmt + var functype *ast.FuncType + switch n := fn.syntax.(type) { + case nil: + return // not a Go source function. (Synthetic, or from object file.) + case *ast.FuncDecl: + functype = n.Type + recvField = n.Recv + body = n.Body + case *ast.FuncLit: + functype = n.Type + body = n.Body + default: + panic(n) + } + + if body == nil { + // External function. + if fn.Params == nil { + // This condition ensures we add a non-empty + // params list once only, but we may attempt + // the degenerate empty case repeatedly. + // TODO(adonovan): opt: don't do that. + + // We set Function.Params even though there is no body + // code to reference them. This simplifies clients. + if recv := fn.Signature.Recv(); recv != nil { + fn.addParamObj(recv) + } + params := fn.Signature.Params() + for i, n := 0, params.Len(); i < n; i++ { + fn.addParamObj(params.At(i)) + } + } + return + } + if fn.Prog.mode&LogSource != 0 { + defer logStack("build function %s @ %s", fn, fn.Prog.Fset.Position(fn.pos))() + } + fn.startBody() + fn.createSyntacticParams(recvField, functype) + b.stmt(fn, body) + if cb := fn.currentBlock; cb != nil && (cb == fn.Blocks[0] || cb == fn.Recover || cb.Preds != nil) { + // Control fell off the end of the function's body block. + // + // Block optimizations eliminate the current block, if + // unreachable. It is a builder invariant that + // if this no-arg return is ill-typed for + // fn.Signature.Results, this block must be + // unreachable. The sanity checker checks this. + fn.emit(new(RunDefers)) + fn.emit(new(Return)) + } + fn.finishBody() +} + +// buildFuncDecl builds SSA code for the function or method declared +// by decl in package pkg. +// +func (b *builder) buildFuncDecl(pkg *Package, decl *ast.FuncDecl) { + id := decl.Name + if isBlankIdent(id) { + return // discard + } + fn := pkg.values[pkg.info.Defs[id]].(*Function) + if decl.Recv == nil && id.Name == "init" { + var v Call + v.Call.Value = fn + v.setType(types.NewTuple()) + pkg.init.emit(&v) + } + b.buildFunction(fn) +} + +// BuildAll calls Package.Build() for each package in prog. +// Building occurs in parallel unless the BuildSerially mode flag was set. +// +// BuildAll is intended for whole-program analysis; a typical compiler +// need only build a single package. +// +// BuildAll is idempotent and thread-safe. +// +// TODO(adonovan): rename to Build. +// +func (prog *Program) BuildAll() { + var wg sync.WaitGroup + for _, p := range prog.packages { + if prog.mode&BuildSerially != 0 { + p.Build() + } else { + wg.Add(1) + go func(p *Package) { + p.Build() + wg.Done() + }(p) + } + } + wg.Wait() +} + +// Build builds SSA code for all functions and vars in package p. +// +// Precondition: CreatePackage must have been called for all of p's +// direct imports (and hence its direct imports must have been +// error-free). +// +// Build is idempotent and thread-safe. +// +func (p *Package) Build() { + if !atomic.CompareAndSwapInt32(&p.started, 0, 1) { + return // already started + } + if p.info == nil { + return // synthetic package, e.g. "testmain" + } + if p.files == nil { + p.info = nil + return // package loaded from export data + } + + // Ensure we have runtime type info for all exported members. + // TODO(adonovan): ideally belongs in memberFromObject, but + // that would require package creation in topological order. + for name, mem := range p.Members { + if ast.IsExported(name) { + p.Prog.needMethodsOf(mem.Type()) + } + } + if p.Prog.mode&LogSource != 0 { + defer logStack("build %s", p)() + } + init := p.init + init.startBody() + + var done *BasicBlock + + if p.Prog.mode&BareInits == 0 { + // Make init() skip if package is already initialized. + initguard := p.Var("init$guard") + doinit := init.newBasicBlock("init.start") + done = init.newBasicBlock("init.done") + emitIf(init, emitLoad(init, initguard), done, doinit) + init.currentBlock = doinit + emitStore(init, initguard, vTrue, token.NoPos) + + // Call the init() function of each package we import. + for _, pkg := range p.Object.Imports() { + prereq := p.Prog.packages[pkg] + if prereq == nil { + panic(fmt.Sprintf("Package(%q).Build(): unsatisfied import: Program.CreatePackage(%q) was not called", p.Object.Path(), pkg.Path())) + } + var v Call + v.Call.Value = prereq.init + v.Call.pos = init.pos + v.setType(types.NewTuple()) + init.emit(&v) + } + } + + var b builder + + // Initialize package-level vars in correct order. + for _, varinit := range p.info.InitOrder { + if init.Prog.mode&LogSource != 0 { + fmt.Fprintf(os.Stderr, "build global initializer %v @ %s\n", + varinit.Lhs, p.Prog.Fset.Position(varinit.Rhs.Pos())) + } + if len(varinit.Lhs) == 1 { + // 1:1 initialization: var x, y = a(), b() + var lval lvalue + if v := varinit.Lhs[0]; v.Name() != "_" { + lval = &address{addr: p.values[v].(*Global), pos: v.Pos()} + } else { + lval = blank{} + } + b.assign(init, lval, varinit.Rhs, true, nil) + } else { + // n:1 initialization: var x, y := f() + tuple := b.exprN(init, varinit.Rhs) + for i, v := range varinit.Lhs { + if v.Name() == "_" { + continue + } + emitStore(init, p.values[v].(*Global), emitExtract(init, tuple, i), v.Pos()) + } + } + } + + // Build all package-level functions, init functions + // and methods, including unreachable/blank ones. + // We build them in source order, but it's not significant. + for _, file := range p.files { + for _, decl := range file.Decls { + if decl, ok := decl.(*ast.FuncDecl); ok { + b.buildFuncDecl(p, decl) + } + } + } + + // Finish up init(). + if p.Prog.mode&BareInits == 0 { + emitJump(init, done) + init.currentBlock = done + } + init.emit(new(Return)) + init.finishBody() + + p.info = nil // We no longer need ASTs or go/types deductions. + + if p.Prog.mode&SanityCheckFunctions != 0 { + sanityCheckPackage(p) + } +} + +// Like ObjectOf, but panics instead of returning nil. +// Only valid during p's create and build phases. +func (p *Package) objectOf(id *ast.Ident) types.Object { + if o := p.info.ObjectOf(id); o != nil { + return o + } + panic(fmt.Sprintf("no types.Object for ast.Ident %s @ %s", + id.Name, p.Prog.Fset.Position(id.Pos()))) +} + +// Like TypeOf, but panics instead of returning nil. +// Only valid during p's create and build phases. +func (p *Package) typeOf(e ast.Expr) types.Type { + if T := p.info.TypeOf(e); T != nil { + return T + } + panic(fmt.Sprintf("no type for %T @ %s", + e, p.Prog.Fset.Position(e.Pos()))) +} diff --git a/vendor/golang.org/x/tools/go/ssa/const.go b/vendor/golang.org/x/tools/go/ssa/const.go new file mode 100644 index 0000000..304096e --- /dev/null +++ b/vendor/golang.org/x/tools/go/ssa/const.go @@ -0,0 +1,168 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package ssa + +// This file defines the Const SSA value type. + +import ( + "fmt" + "go/token" + "strconv" + + "golang.org/x/tools/go/exact" + "golang.org/x/tools/go/types" +) + +// NewConst returns a new constant of the specified value and type. +// val must be valid according to the specification of Const.Value. +// +func NewConst(val exact.Value, typ types.Type) *Const { + return &Const{typ, val} +} + +// intConst returns an 'int' constant that evaluates to i. +// (i is an int64 in case the host is narrower than the target.) +func intConst(i int64) *Const { + return NewConst(exact.MakeInt64(i), tInt) +} + +// nilConst returns a nil constant of the specified type, which may +// be any reference type, including interfaces. +// +func nilConst(typ types.Type) *Const { + return NewConst(nil, typ) +} + +// stringConst returns a 'string' constant that evaluates to s. +func stringConst(s string) *Const { + return NewConst(exact.MakeString(s), tString) +} + +// zeroConst returns a new "zero" constant of the specified type, +// which must not be an array or struct type: the zero values of +// aggregates are well-defined but cannot be represented by Const. +// +func zeroConst(t types.Type) *Const { + switch t := t.(type) { + case *types.Basic: + switch { + case t.Info()&types.IsBoolean != 0: + return NewConst(exact.MakeBool(false), t) + case t.Info()&types.IsNumeric != 0: + return NewConst(exact.MakeInt64(0), t) + case t.Info()&types.IsString != 0: + return NewConst(exact.MakeString(""), t) + case t.Kind() == types.UnsafePointer: + fallthrough + case t.Kind() == types.UntypedNil: + return nilConst(t) + default: + panic(fmt.Sprint("zeroConst for unexpected type:", t)) + } + case *types.Pointer, *types.Slice, *types.Interface, *types.Chan, *types.Map, *types.Signature: + return nilConst(t) + case *types.Named: + return NewConst(zeroConst(t.Underlying()).Value, t) + case *types.Array, *types.Struct, *types.Tuple: + panic(fmt.Sprint("zeroConst applied to aggregate:", t)) + } + panic(fmt.Sprint("zeroConst: unexpected ", t)) +} + +func (c *Const) RelString(from *types.Package) string { + var s string + if c.Value == nil { + s = "nil" + } else if c.Value.Kind() == exact.String { + s = exact.StringVal(c.Value) + const max = 20 + // TODO(adonovan): don't cut a rune in half. + if len(s) > max { + s = s[:max-3] + "..." // abbreviate + } + s = strconv.Quote(s) + } else { + s = c.Value.String() + } + return s + ":" + relType(c.Type(), from) +} + +func (c *Const) Name() string { + return c.RelString(nil) +} + +func (c *Const) String() string { + return c.Name() +} + +func (c *Const) Type() types.Type { + return c.typ +} + +func (c *Const) Referrers() *[]Instruction { + return nil +} + +func (c *Const) Parent() *Function { return nil } + +func (c *Const) Pos() token.Pos { + return token.NoPos +} + +// IsNil returns true if this constant represents a typed or untyped nil value. +func (c *Const) IsNil() bool { + return c.Value == nil +} + +// Int64 returns the numeric value of this constant truncated to fit +// a signed 64-bit integer. +// +func (c *Const) Int64() int64 { + switch x := c.Value; x.Kind() { + case exact.Int: + if i, ok := exact.Int64Val(x); ok { + return i + } + return 0 + case exact.Float: + f, _ := exact.Float64Val(x) + return int64(f) + } + panic(fmt.Sprintf("unexpected constant value: %T", c.Value)) +} + +// Uint64 returns the numeric value of this constant truncated to fit +// an unsigned 64-bit integer. +// +func (c *Const) Uint64() uint64 { + switch x := c.Value; x.Kind() { + case exact.Int: + if u, ok := exact.Uint64Val(x); ok { + return u + } + return 0 + case exact.Float: + f, _ := exact.Float64Val(x) + return uint64(f) + } + panic(fmt.Sprintf("unexpected constant value: %T", c.Value)) +} + +// Float64 returns the numeric value of this constant truncated to fit +// a float64. +// +func (c *Const) Float64() float64 { + f, _ := exact.Float64Val(c.Value) + return f +} + +// Complex128 returns the complex value of this constant truncated to +// fit a complex128. +// +func (c *Const) Complex128() complex128 { + re, _ := exact.Float64Val(exact.Real(c.Value)) + im, _ := exact.Float64Val(exact.Imag(c.Value)) + return complex(re, im) +} diff --git a/vendor/golang.org/x/tools/go/ssa/create.go b/vendor/golang.org/x/tools/go/ssa/create.go new file mode 100644 index 0000000..88226ae --- /dev/null +++ b/vendor/golang.org/x/tools/go/ssa/create.go @@ -0,0 +1,257 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package ssa + +// This file implements the CREATE phase of SSA construction. +// See builder.go for explanation. + +import ( + "fmt" + "go/ast" + "go/token" + "os" + "sync" + + "golang.org/x/tools/go/types" + "golang.org/x/tools/go/types/typeutil" +) + +// NewProgram returns a new SSA Program. +// +// mode controls diagnostics and checking during SSA construction. +// +func NewProgram(fset *token.FileSet, mode BuilderMode) *Program { + prog := &Program{ + Fset: fset, + imported: make(map[string]*Package), + packages: make(map[*types.Package]*Package), + thunks: make(map[selectionKey]*Function), + bounds: make(map[*types.Func]*Function), + mode: mode, + } + + h := typeutil.MakeHasher() // protected by methodsMu, in effect + prog.methodSets.SetHasher(h) + prog.canon.SetHasher(h) + + return prog +} + +// memberFromObject populates package pkg with a member for the +// typechecker object obj. +// +// For objects from Go source code, syntax is the associated syntax +// tree (for funcs and vars only); it will be used during the build +// phase. +// +func memberFromObject(pkg *Package, obj types.Object, syntax ast.Node) { + name := obj.Name() + switch obj := obj.(type) { + case *types.TypeName: + pkg.Members[name] = &Type{ + object: obj, + pkg: pkg, + } + + case *types.Const: + c := &NamedConst{ + object: obj, + Value: NewConst(obj.Val(), obj.Type()), + pkg: pkg, + } + pkg.values[obj] = c.Value + pkg.Members[name] = c + + case *types.Var: + g := &Global{ + Pkg: pkg, + name: name, + object: obj, + typ: types.NewPointer(obj.Type()), // address + pos: obj.Pos(), + } + pkg.values[obj] = g + pkg.Members[name] = g + + case *types.Func: + sig := obj.Type().(*types.Signature) + if sig.Recv() == nil && name == "init" { + pkg.ninit++ + name = fmt.Sprintf("init#%d", pkg.ninit) + } + fn := &Function{ + name: name, + object: obj, + Signature: sig, + syntax: syntax, + pos: obj.Pos(), + Pkg: pkg, + Prog: pkg.Prog, + } + if syntax == nil { + fn.Synthetic = "loaded from gc object file" + } + + pkg.values[obj] = fn + if sig.Recv() == nil { + pkg.Members[name] = fn // package-level function + } + + default: // (incl. *types.Package) + panic("unexpected Object type: " + obj.String()) + } +} + +// membersFromDecl populates package pkg with members for each +// typechecker object (var, func, const or type) associated with the +// specified decl. +// +func membersFromDecl(pkg *Package, decl ast.Decl) { + switch decl := decl.(type) { + case *ast.GenDecl: // import, const, type or var + switch decl.Tok { + case token.CONST: + for _, spec := range decl.Specs { + for _, id := range spec.(*ast.ValueSpec).Names { + if !isBlankIdent(id) { + memberFromObject(pkg, pkg.info.Defs[id], nil) + } + } + } + + case token.VAR: + for _, spec := range decl.Specs { + for _, id := range spec.(*ast.ValueSpec).Names { + if !isBlankIdent(id) { + memberFromObject(pkg, pkg.info.Defs[id], spec) + } + } + } + + case token.TYPE: + for _, spec := range decl.Specs { + id := spec.(*ast.TypeSpec).Name + if !isBlankIdent(id) { + memberFromObject(pkg, pkg.info.Defs[id], nil) + } + } + } + + case *ast.FuncDecl: + id := decl.Name + if !isBlankIdent(id) { + memberFromObject(pkg, pkg.info.Defs[id], decl) + } + } +} + +// CreatePackage constructs and returns an SSA Package from the +// specified type-checked, error-free file ASTs, and populates its +// Members mapping. +// +// importable determines whether this package should be returned by a +// subsequent call to ImportedPackage(pkg.Path()). +// +// The real work of building SSA form for each function is not done +// until a subsequent call to Package.Build(). +// +func (prog *Program) CreatePackage(pkg *types.Package, files []*ast.File, info *types.Info, importable bool) *Package { + p := &Package{ + Prog: prog, + Members: make(map[string]Member), + values: make(map[types.Object]Value), + Object: pkg, + info: info, // transient (CREATE and BUILD phases) + files: files, // transient (CREATE and BUILD phases) + } + + // Add init() function. + p.init = &Function{ + name: "init", + Signature: new(types.Signature), + Synthetic: "package initializer", + Pkg: p, + Prog: prog, + } + p.Members[p.init.name] = p.init + + // CREATE phase. + // Allocate all package members: vars, funcs, consts and types. + if len(files) > 0 { + // Go source package. + for _, file := range files { + for _, decl := range file.Decls { + membersFromDecl(p, decl) + } + } + } else { + // GC-compiled binary package. + // No code. + // No position information. + scope := p.Object.Scope() + for _, name := range scope.Names() { + obj := scope.Lookup(name) + memberFromObject(p, obj, nil) + if obj, ok := obj.(*types.TypeName); ok { + named := obj.Type().(*types.Named) + for i, n := 0, named.NumMethods(); i < n; i++ { + memberFromObject(p, named.Method(i), nil) + } + } + } + } + + if prog.mode&BareInits == 0 { + // Add initializer guard variable. + initguard := &Global{ + Pkg: p, + name: "init$guard", + typ: types.NewPointer(tBool), + } + p.Members[initguard.Name()] = initguard + } + + if prog.mode&GlobalDebug != 0 { + p.SetDebugMode(true) + } + + if prog.mode&PrintPackages != 0 { + printMu.Lock() + p.WriteTo(os.Stdout) + printMu.Unlock() + } + + if importable { + prog.imported[p.Object.Path()] = p + } + prog.packages[p.Object] = p + + return p +} + +// printMu serializes printing of Packages/Functions to stdout. +var printMu sync.Mutex + +// AllPackages returns a new slice containing all packages in the +// program prog in unspecified order. +// +func (prog *Program) AllPackages() []*Package { + pkgs := make([]*Package, 0, len(prog.packages)) + for _, pkg := range prog.packages { + pkgs = append(pkgs, pkg) + } + return pkgs +} + +// ImportedPackage returns the importable SSA Package whose import +// path is path, or nil if no such SSA package has been created. +// +// Not all packages are importable. For example, no import +// declaration can resolve to the x_test package created by 'go test' +// or the ad-hoc main package created 'go build foo.go'. +// +func (prog *Program) ImportedPackage(path string) *Package { + return prog.imported[path] +} diff --git a/vendor/golang.org/x/tools/go/ssa/doc.go b/vendor/golang.org/x/tools/go/ssa/doc.go new file mode 100644 index 0000000..2aa04f4 --- /dev/null +++ b/vendor/golang.org/x/tools/go/ssa/doc.go @@ -0,0 +1,123 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package ssa defines a representation of the elements of Go programs +// (packages, types, functions, variables and constants) using a +// static single-assignment (SSA) form intermediate representation +// (IR) for the bodies of functions. +// +// THIS INTERFACE IS EXPERIMENTAL AND IS LIKELY TO CHANGE. +// +// For an introduction to SSA form, see +// http://en.wikipedia.org/wiki/Static_single_assignment_form. +// This page provides a broader reading list: +// http://www.dcs.gla.ac.uk/~jsinger/ssa.html. +// +// The level of abstraction of the SSA form is intentionally close to +// the source language to facilitate construction of source analysis +// tools. It is not intended for machine code generation. +// +// All looping, branching and switching constructs are replaced with +// unstructured control flow. Higher-level control flow constructs +// such as multi-way branch can be reconstructed as needed; see +// ssautil.Switches() for an example. +// +// To construct an SSA-form program, call ssautil.CreateProgram on a +// loader.Program, a set of type-checked packages created from +// parsed Go source files. The resulting ssa.Program contains all the +// packages and their members, but SSA code is not created for +// function bodies until a subsequent call to (*Package).Build. +// +// The builder initially builds a naive SSA form in which all local +// variables are addresses of stack locations with explicit loads and +// stores. Registerisation of eligible locals and φ-node insertion +// using dominance and dataflow are then performed as a second pass +// called "lifting" to improve the accuracy and performance of +// subsequent analyses; this pass can be skipped by setting the +// NaiveForm builder flag. +// +// The primary interfaces of this package are: +// +// - Member: a named member of a Go package. +// - Value: an expression that yields a value. +// - Instruction: a statement that consumes values and performs computation. +// - Node: a Value or Instruction (emphasizing its membership in the SSA value graph) +// +// A computation that yields a result implements both the Value and +// Instruction interfaces. The following table shows for each +// concrete type which of these interfaces it implements. +// +// Value? Instruction? Member? +// *Alloc ✔ ✔ +// *BinOp ✔ ✔ +// *Builtin ✔ +// *Call ✔ ✔ +// *ChangeInterface ✔ ✔ +// *ChangeType ✔ ✔ +// *Const ✔ +// *Convert ✔ ✔ +// *DebugRef ✔ +// *Defer ✔ +// *Extract ✔ ✔ +// *Field ✔ ✔ +// *FieldAddr ✔ ✔ +// *FreeVar ✔ +// *Function ✔ ✔ (func) +// *Global ✔ ✔ (var) +// *Go ✔ +// *If ✔ +// *Index ✔ ✔ +// *IndexAddr ✔ ✔ +// *Jump ✔ +// *Lookup ✔ ✔ +// *MakeChan ✔ ✔ +// *MakeClosure ✔ ✔ +// *MakeInterface ✔ ✔ +// *MakeMap ✔ ✔ +// *MakeSlice ✔ ✔ +// *MapUpdate ✔ +// *NamedConst ✔ (const) +// *Next ✔ ✔ +// *Panic ✔ +// *Parameter ✔ +// *Phi ✔ ✔ +// *Range ✔ ✔ +// *Return ✔ +// *RunDefers ✔ +// *Select ✔ ✔ +// *Send ✔ +// *Slice ✔ ✔ +// *Store ✔ +// *Type ✔ (type) +// *TypeAssert ✔ ✔ +// *UnOp ✔ ✔ +// +// Other key types in this package include: Program, Package, Function +// and BasicBlock. +// +// The program representation constructed by this package is fully +// resolved internally, i.e. it does not rely on the names of Values, +// Packages, Functions, Types or BasicBlocks for the correct +// interpretation of the program. Only the identities of objects and +// the topology of the SSA and type graphs are semantically +// significant. (There is one exception: Ids, used to identify field +// and method names, contain strings.) Avoidance of name-based +// operations simplifies the implementation of subsequent passes and +// can make them very efficient. Many objects are nonetheless named +// to aid in debugging, but it is not essential that the names be +// either accurate or unambiguous. The public API exposes a number of +// name-based maps for client convenience. +// +// The ssa/ssautil package provides various utilities that depend only +// on the public API of this package. +// +// TODO(adonovan): Consider the exceptional control-flow implications +// of defer and recover(). +// +// TODO(adonovan): write a how-to document for all the various cases +// of trying to determine corresponding elements across the four +// domains of source locations, ast.Nodes, types.Objects, +// ssa.Values/Instructions. +// +package ssa // import "golang.org/x/tools/go/ssa" diff --git a/vendor/golang.org/x/tools/go/ssa/dom.go b/vendor/golang.org/x/tools/go/ssa/dom.go new file mode 100644 index 0000000..12ef430 --- /dev/null +++ b/vendor/golang.org/x/tools/go/ssa/dom.go @@ -0,0 +1,341 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package ssa + +// This file defines algorithms related to dominance. + +// Dominator tree construction ---------------------------------------- +// +// We use the algorithm described in Lengauer & Tarjan. 1979. A fast +// algorithm for finding dominators in a flowgraph. +// http://doi.acm.org/10.1145/357062.357071 +// +// We also apply the optimizations to SLT described in Georgiadis et +// al, Finding Dominators in Practice, JGAA 2006, +// http://jgaa.info/accepted/2006/GeorgiadisTarjanWerneck2006.10.1.pdf +// to avoid the need for buckets of size > 1. + +import ( + "bytes" + "fmt" + "math/big" + "os" + "sort" +) + +// Idom returns the block that immediately dominates b: +// its parent in the dominator tree, if any. +// Neither the entry node (b.Index==0) nor recover node +// (b==b.Parent().Recover()) have a parent. +// +func (b *BasicBlock) Idom() *BasicBlock { return b.dom.idom } + +// Dominees returns the list of blocks that b immediately dominates: +// its children in the dominator tree. +// +func (b *BasicBlock) Dominees() []*BasicBlock { return b.dom.children } + +// Dominates reports whether b dominates c. +func (b *BasicBlock) Dominates(c *BasicBlock) bool { + return b.dom.pre <= c.dom.pre && c.dom.post <= b.dom.post +} + +type byDomPreorder []*BasicBlock + +func (a byDomPreorder) Len() int { return len(a) } +func (a byDomPreorder) Swap(i, j int) { a[i], a[j] = a[j], a[i] } +func (a byDomPreorder) Less(i, j int) bool { return a[i].dom.pre < a[j].dom.pre } + +// DomPreorder returns a new slice containing the blocks of f in +// dominator tree preorder. +// +func (f *Function) DomPreorder() []*BasicBlock { + n := len(f.Blocks) + order := make(byDomPreorder, n, n) + copy(order, f.Blocks) + sort.Sort(order) + return order +} + +// domInfo contains a BasicBlock's dominance information. +type domInfo struct { + idom *BasicBlock // immediate dominator (parent in domtree) + children []*BasicBlock // nodes immediately dominated by this one + pre, post int32 // pre- and post-order numbering within domtree +} + +// ltState holds the working state for Lengauer-Tarjan algorithm +// (during which domInfo.pre is repurposed for CFG DFS preorder number). +type ltState struct { + // Each slice is indexed by b.Index. + sdom []*BasicBlock // b's semidominator + parent []*BasicBlock // b's parent in DFS traversal of CFG + ancestor []*BasicBlock // b's ancestor with least sdom +} + +// dfs implements the depth-first search part of the LT algorithm. +func (lt *ltState) dfs(v *BasicBlock, i int32, preorder []*BasicBlock) int32 { + preorder[i] = v + v.dom.pre = i // For now: DFS preorder of spanning tree of CFG + i++ + lt.sdom[v.Index] = v + lt.link(nil, v) + for _, w := range v.Succs { + if lt.sdom[w.Index] == nil { + lt.parent[w.Index] = v + i = lt.dfs(w, i, preorder) + } + } + return i +} + +// eval implements the EVAL part of the LT algorithm. +func (lt *ltState) eval(v *BasicBlock) *BasicBlock { + // TODO(adonovan): opt: do path compression per simple LT. + u := v + for ; lt.ancestor[v.Index] != nil; v = lt.ancestor[v.Index] { + if lt.sdom[v.Index].dom.pre < lt.sdom[u.Index].dom.pre { + u = v + } + } + return u +} + +// link implements the LINK part of the LT algorithm. +func (lt *ltState) link(v, w *BasicBlock) { + lt.ancestor[w.Index] = v +} + +// buildDomTree computes the dominator tree of f using the LT algorithm. +// Precondition: all blocks are reachable (e.g. optimizeBlocks has been run). +// +func buildDomTree(f *Function) { + // The step numbers refer to the original LT paper; the + // reordering is due to Georgiadis. + + // Clear any previous domInfo. + for _, b := range f.Blocks { + b.dom = domInfo{} + } + + n := len(f.Blocks) + // Allocate space for 5 contiguous [n]*BasicBlock arrays: + // sdom, parent, ancestor, preorder, buckets. + space := make([]*BasicBlock, 5*n, 5*n) + lt := ltState{ + sdom: space[0:n], + parent: space[n : 2*n], + ancestor: space[2*n : 3*n], + } + + // Step 1. Number vertices by depth-first preorder. + preorder := space[3*n : 4*n] + root := f.Blocks[0] + prenum := lt.dfs(root, 0, preorder) + recover := f.Recover + if recover != nil { + lt.dfs(recover, prenum, preorder) + } + + buckets := space[4*n : 5*n] + copy(buckets, preorder) + + // In reverse preorder... + for i := int32(n) - 1; i > 0; i-- { + w := preorder[i] + + // Step 3. Implicitly define the immediate dominator of each node. + for v := buckets[i]; v != w; v = buckets[v.dom.pre] { + u := lt.eval(v) + if lt.sdom[u.Index].dom.pre < i { + v.dom.idom = u + } else { + v.dom.idom = w + } + } + + // Step 2. Compute the semidominators of all nodes. + lt.sdom[w.Index] = lt.parent[w.Index] + for _, v := range w.Preds { + u := lt.eval(v) + if lt.sdom[u.Index].dom.pre < lt.sdom[w.Index].dom.pre { + lt.sdom[w.Index] = lt.sdom[u.Index] + } + } + + lt.link(lt.parent[w.Index], w) + + if lt.parent[w.Index] == lt.sdom[w.Index] { + w.dom.idom = lt.parent[w.Index] + } else { + buckets[i] = buckets[lt.sdom[w.Index].dom.pre] + buckets[lt.sdom[w.Index].dom.pre] = w + } + } + + // The final 'Step 3' is now outside the loop. + for v := buckets[0]; v != root; v = buckets[v.dom.pre] { + v.dom.idom = root + } + + // Step 4. Explicitly define the immediate dominator of each + // node, in preorder. + for _, w := range preorder[1:] { + if w == root || w == recover { + w.dom.idom = nil + } else { + if w.dom.idom != lt.sdom[w.Index] { + w.dom.idom = w.dom.idom.dom.idom + } + // Calculate Children relation as inverse of Idom. + w.dom.idom.dom.children = append(w.dom.idom.dom.children, w) + } + } + + pre, post := numberDomTree(root, 0, 0) + if recover != nil { + numberDomTree(recover, pre, post) + } + + // printDomTreeDot(os.Stderr, f) // debugging + // printDomTreeText(os.Stderr, root, 0) // debugging + + if f.Prog.mode&SanityCheckFunctions != 0 { + sanityCheckDomTree(f) + } +} + +// numberDomTree sets the pre- and post-order numbers of a depth-first +// traversal of the dominator tree rooted at v. These are used to +// answer dominance queries in constant time. +// +func numberDomTree(v *BasicBlock, pre, post int32) (int32, int32) { + v.dom.pre = pre + pre++ + for _, child := range v.dom.children { + pre, post = numberDomTree(child, pre, post) + } + v.dom.post = post + post++ + return pre, post +} + +// Testing utilities ---------------------------------------- + +// sanityCheckDomTree checks the correctness of the dominator tree +// computed by the LT algorithm by comparing against the dominance +// relation computed by a naive Kildall-style forward dataflow +// analysis (Algorithm 10.16 from the "Dragon" book). +// +func sanityCheckDomTree(f *Function) { + n := len(f.Blocks) + + // D[i] is the set of blocks that dominate f.Blocks[i], + // represented as a bit-set of block indices. + D := make([]big.Int, n) + + one := big.NewInt(1) + + // all is the set of all blocks; constant. + var all big.Int + all.Set(one).Lsh(&all, uint(n)).Sub(&all, one) + + // Initialization. + for i, b := range f.Blocks { + if i == 0 || b == f.Recover { + // A root is dominated only by itself. + D[i].SetBit(&D[0], 0, 1) + } else { + // All other blocks are (initially) dominated + // by every block. + D[i].Set(&all) + } + } + + // Iteration until fixed point. + for changed := true; changed; { + changed = false + for i, b := range f.Blocks { + if i == 0 || b == f.Recover { + continue + } + // Compute intersection across predecessors. + var x big.Int + x.Set(&all) + for _, pred := range b.Preds { + x.And(&x, &D[pred.Index]) + } + x.SetBit(&x, i, 1) // a block always dominates itself. + if D[i].Cmp(&x) != 0 { + D[i].Set(&x) + changed = true + } + } + } + + // Check the entire relation. O(n^2). + // The Recover block (if any) must be treated specially so we skip it. + ok := true + for i := 0; i < n; i++ { + for j := 0; j < n; j++ { + b, c := f.Blocks[i], f.Blocks[j] + if c == f.Recover { + continue + } + actual := b.Dominates(c) + expected := D[j].Bit(i) == 1 + if actual != expected { + fmt.Fprintf(os.Stderr, "dominates(%s, %s)==%t, want %t\n", b, c, actual, expected) + ok = false + } + } + } + + preorder := f.DomPreorder() + for _, b := range f.Blocks { + if got := preorder[b.dom.pre]; got != b { + fmt.Fprintf(os.Stderr, "preorder[%d]==%s, want %s\n", b.dom.pre, got, b) + ok = false + } + } + + if !ok { + panic("sanityCheckDomTree failed for " + f.String()) + } + +} + +// Printing functions ---------------------------------------- + +// printDomTree prints the dominator tree as text, using indentation. +func printDomTreeText(buf *bytes.Buffer, v *BasicBlock, indent int) { + fmt.Fprintf(buf, "%*s%s\n", 4*indent, "", v) + for _, child := range v.dom.children { + printDomTreeText(buf, child, indent+1) + } +} + +// printDomTreeDot prints the dominator tree of f in AT&T GraphViz +// (.dot) format. +func printDomTreeDot(buf *bytes.Buffer, f *Function) { + fmt.Fprintln(buf, "//", f) + fmt.Fprintln(buf, "digraph domtree {") + for i, b := range f.Blocks { + v := b.dom + fmt.Fprintf(buf, "\tn%d [label=\"%s (%d, %d)\",shape=\"rectangle\"];\n", v.pre, b, v.pre, v.post) + // TODO(adonovan): improve appearance of edges + // belonging to both dominator tree and CFG. + + // Dominator tree edge. + if i != 0 { + fmt.Fprintf(buf, "\tn%d -> n%d [style=\"solid\",weight=100];\n", v.idom.dom.pre, v.pre) + } + // CFG edges. + for _, pred := range b.Preds { + fmt.Fprintf(buf, "\tn%d -> n%d [style=\"dotted\",weight=0];\n", pred.dom.pre, v.pre) + } + } + fmt.Fprintln(buf, "}") +} diff --git a/vendor/golang.org/x/tools/go/ssa/emit.go b/vendor/golang.org/x/tools/go/ssa/emit.go new file mode 100644 index 0000000..fa9646b --- /dev/null +++ b/vendor/golang.org/x/tools/go/ssa/emit.go @@ -0,0 +1,469 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package ssa + +// Helpers for emitting SSA instructions. + +import ( + "fmt" + "go/ast" + "go/token" + + "golang.org/x/tools/go/types" +) + +// emitNew emits to f a new (heap Alloc) instruction allocating an +// object of type typ. pos is the optional source location. +// +func emitNew(f *Function, typ types.Type, pos token.Pos) *Alloc { + v := &Alloc{Heap: true} + v.setType(types.NewPointer(typ)) + v.setPos(pos) + f.emit(v) + return v +} + +// emitLoad emits to f an instruction to load the address addr into a +// new temporary, and returns the value so defined. +// +func emitLoad(f *Function, addr Value) *UnOp { + v := &UnOp{Op: token.MUL, X: addr} + v.setType(deref(addr.Type())) + f.emit(v) + return v +} + +// emitDebugRef emits to f a DebugRef pseudo-instruction associating +// expression e with value v. +// +func emitDebugRef(f *Function, e ast.Expr, v Value, isAddr bool) { + if !f.debugInfo() { + return // debugging not enabled + } + if v == nil || e == nil { + panic("nil") + } + var obj types.Object + e = unparen(e) + if id, ok := e.(*ast.Ident); ok { + if isBlankIdent(id) { + return + } + obj = f.Pkg.objectOf(id) + switch obj.(type) { + case *types.Nil, *types.Const, *types.Builtin: + return + } + } + f.emit(&DebugRef{ + X: v, + Expr: e, + IsAddr: isAddr, + object: obj, + }) +} + +// emitArith emits to f code to compute the binary operation op(x, y) +// where op is an eager shift, logical or arithmetic operation. +// (Use emitCompare() for comparisons and Builder.logicalBinop() for +// non-eager operations.) +// +func emitArith(f *Function, op token.Token, x, y Value, t types.Type, pos token.Pos) Value { + switch op { + case token.SHL, token.SHR: + x = emitConv(f, x, t) + // y may be signed or an 'untyped' constant. + // TODO(adonovan): whence signed values? + if b, ok := y.Type().Underlying().(*types.Basic); ok && b.Info()&types.IsUnsigned == 0 { + y = emitConv(f, y, types.Typ[types.Uint64]) + } + + case token.ADD, token.SUB, token.MUL, token.QUO, token.REM, token.AND, token.OR, token.XOR, token.AND_NOT: + x = emitConv(f, x, t) + y = emitConv(f, y, t) + + default: + panic("illegal op in emitArith: " + op.String()) + + } + v := &BinOp{ + Op: op, + X: x, + Y: y, + } + v.setPos(pos) + v.setType(t) + return f.emit(v) +} + +// emitCompare emits to f code compute the boolean result of +// comparison comparison 'x op y'. +// +func emitCompare(f *Function, op token.Token, x, y Value, pos token.Pos) Value { + xt := x.Type().Underlying() + yt := y.Type().Underlying() + + // Special case to optimise a tagless SwitchStmt so that + // these are equivalent + // switch { case e: ...} + // switch true { case e: ... } + // if e==true { ... } + // even in the case when e's type is an interface. + // TODO(adonovan): opt: generalise to x==true, false!=y, etc. + if x == vTrue && op == token.EQL { + if yt, ok := yt.(*types.Basic); ok && yt.Info()&types.IsBoolean != 0 { + return y + } + } + + if types.Identical(xt, yt) { + // no conversion necessary + } else if _, ok := xt.(*types.Interface); ok { + y = emitConv(f, y, x.Type()) + } else if _, ok := yt.(*types.Interface); ok { + x = emitConv(f, x, y.Type()) + } else if _, ok := x.(*Const); ok { + x = emitConv(f, x, y.Type()) + } else if _, ok := y.(*Const); ok { + y = emitConv(f, y, x.Type()) + } else { + // other cases, e.g. channels. No-op. + } + + v := &BinOp{ + Op: op, + X: x, + Y: y, + } + v.setPos(pos) + v.setType(tBool) + return f.emit(v) +} + +// isValuePreserving returns true if a conversion from ut_src to +// ut_dst is value-preserving, i.e. just a change of type. +// Precondition: neither argument is a named type. +// +func isValuePreserving(ut_src, ut_dst types.Type) bool { + // Identical underlying types? + if types.Identical(ut_dst, ut_src) { + return true + } + + switch ut_dst.(type) { + case *types.Chan: + // Conversion between channel types? + _, ok := ut_src.(*types.Chan) + return ok + + case *types.Pointer: + // Conversion between pointers with identical base types? + _, ok := ut_src.(*types.Pointer) + return ok + } + return false +} + +// emitConv emits to f code to convert Value val to exactly type typ, +// and returns the converted value. Implicit conversions are required +// by language assignability rules in assignments, parameter passing, +// etc. Conversions cannot fail dynamically. +// +func emitConv(f *Function, val Value, typ types.Type) Value { + t_src := val.Type() + + // Identical types? Conversion is a no-op. + if types.Identical(t_src, typ) { + return val + } + + ut_dst := typ.Underlying() + ut_src := t_src.Underlying() + + // Just a change of type, but not value or representation? + if isValuePreserving(ut_src, ut_dst) { + c := &ChangeType{X: val} + c.setType(typ) + return f.emit(c) + } + + // Conversion to, or construction of a value of, an interface type? + if _, ok := ut_dst.(*types.Interface); ok { + // Assignment from one interface type to another? + if _, ok := ut_src.(*types.Interface); ok { + c := &ChangeInterface{X: val} + c.setType(typ) + return f.emit(c) + } + + // Untyped nil constant? Return interface-typed nil constant. + if ut_src == tUntypedNil { + return nilConst(typ) + } + + // Convert (non-nil) "untyped" literals to their default type. + if t, ok := ut_src.(*types.Basic); ok && t.Info()&types.IsUntyped != 0 { + val = emitConv(f, val, DefaultType(ut_src)) + } + + f.Pkg.Prog.needMethodsOf(val.Type()) + mi := &MakeInterface{X: val} + mi.setType(typ) + return f.emit(mi) + } + + // Conversion of a compile-time constant value? + if c, ok := val.(*Const); ok { + if _, ok := ut_dst.(*types.Basic); ok || c.IsNil() { + // Conversion of a compile-time constant to + // another constant type results in a new + // constant of the destination type and + // (initially) the same abstract value. + // We don't truncate the value yet. + return NewConst(c.Value, typ) + } + + // We're converting from constant to non-constant type, + // e.g. string -> []byte/[]rune. + } + + // A representation-changing conversion? + // At least one of {ut_src,ut_dst} must be *Basic. + // (The other may be []byte or []rune.) + _, ok1 := ut_src.(*types.Basic) + _, ok2 := ut_dst.(*types.Basic) + if ok1 || ok2 { + c := &Convert{X: val} + c.setType(typ) + return f.emit(c) + } + + panic(fmt.Sprintf("in %s: cannot convert %s (%s) to %s", f, val, val.Type(), typ)) +} + +// emitStore emits to f an instruction to store value val at location +// addr, applying implicit conversions as required by assignability rules. +// +func emitStore(f *Function, addr, val Value, pos token.Pos) *Store { + s := &Store{ + Addr: addr, + Val: emitConv(f, val, deref(addr.Type())), + pos: pos, + } + f.emit(s) + return s +} + +// emitJump emits to f a jump to target, and updates the control-flow graph. +// Postcondition: f.currentBlock is nil. +// +func emitJump(f *Function, target *BasicBlock) { + b := f.currentBlock + b.emit(new(Jump)) + addEdge(b, target) + f.currentBlock = nil +} + +// emitIf emits to f a conditional jump to tblock or fblock based on +// cond, and updates the control-flow graph. +// Postcondition: f.currentBlock is nil. +// +func emitIf(f *Function, cond Value, tblock, fblock *BasicBlock) { + b := f.currentBlock + b.emit(&If{Cond: cond}) + addEdge(b, tblock) + addEdge(b, fblock) + f.currentBlock = nil +} + +// emitExtract emits to f an instruction to extract the index'th +// component of tuple. It returns the extracted value. +// +func emitExtract(f *Function, tuple Value, index int) Value { + e := &Extract{Tuple: tuple, Index: index} + e.setType(tuple.Type().(*types.Tuple).At(index).Type()) + return f.emit(e) +} + +// emitTypeAssert emits to f a type assertion value := x.(t) and +// returns the value. x.Type() must be an interface. +// +func emitTypeAssert(f *Function, x Value, t types.Type, pos token.Pos) Value { + a := &TypeAssert{X: x, AssertedType: t} + a.setPos(pos) + a.setType(t) + return f.emit(a) +} + +// emitTypeTest emits to f a type test value,ok := x.(t) and returns +// a (value, ok) tuple. x.Type() must be an interface. +// +func emitTypeTest(f *Function, x Value, t types.Type, pos token.Pos) Value { + a := &TypeAssert{ + X: x, + AssertedType: t, + CommaOk: true, + } + a.setPos(pos) + a.setType(types.NewTuple( + newVar("value", t), + varOk, + )) + return f.emit(a) +} + +// emitTailCall emits to f a function call in tail position. The +// caller is responsible for all fields of 'call' except its type. +// Intended for wrapper methods. +// Precondition: f does/will not use deferred procedure calls. +// Postcondition: f.currentBlock is nil. +// +func emitTailCall(f *Function, call *Call) { + tresults := f.Signature.Results() + nr := tresults.Len() + if nr == 1 { + call.typ = tresults.At(0).Type() + } else { + call.typ = tresults + } + tuple := f.emit(call) + var ret Return + switch nr { + case 0: + // no-op + case 1: + ret.Results = []Value{tuple} + default: + for i := 0; i < nr; i++ { + v := emitExtract(f, tuple, i) + // TODO(adonovan): in principle, this is required: + // v = emitConv(f, o.Type, f.Signature.Results[i].Type) + // but in practice emitTailCall is only used when + // the types exactly match. + ret.Results = append(ret.Results, v) + } + } + f.emit(&ret) + f.currentBlock = nil +} + +// emitImplicitSelections emits to f code to apply the sequence of +// implicit field selections specified by indices to base value v, and +// returns the selected value. +// +// If v is the address of a struct, the result will be the address of +// a field; if it is the value of a struct, the result will be the +// value of a field. +// +func emitImplicitSelections(f *Function, v Value, indices []int) Value { + for _, index := range indices { + fld := deref(v.Type()).Underlying().(*types.Struct).Field(index) + + if isPointer(v.Type()) { + instr := &FieldAddr{ + X: v, + Field: index, + } + instr.setType(types.NewPointer(fld.Type())) + v = f.emit(instr) + // Load the field's value iff indirectly embedded. + if isPointer(fld.Type()) { + v = emitLoad(f, v) + } + } else { + instr := &Field{ + X: v, + Field: index, + } + instr.setType(fld.Type()) + v = f.emit(instr) + } + } + return v +} + +// emitFieldSelection emits to f code to select the index'th field of v. +// +// If wantAddr, the input must be a pointer-to-struct and the result +// will be the field's address; otherwise the result will be the +// field's value. +// Ident id is used for position and debug info. +// +func emitFieldSelection(f *Function, v Value, index int, wantAddr bool, id *ast.Ident) Value { + fld := deref(v.Type()).Underlying().(*types.Struct).Field(index) + if isPointer(v.Type()) { + instr := &FieldAddr{ + X: v, + Field: index, + } + instr.setPos(id.Pos()) + instr.setType(types.NewPointer(fld.Type())) + v = f.emit(instr) + // Load the field's value iff we don't want its address. + if !wantAddr { + v = emitLoad(f, v) + } + } else { + instr := &Field{ + X: v, + Field: index, + } + instr.setPos(id.Pos()) + instr.setType(fld.Type()) + v = f.emit(instr) + } + emitDebugRef(f, id, v, wantAddr) + return v +} + +// zeroValue emits to f code to produce a zero value of type t, +// and returns it. +// +func zeroValue(f *Function, t types.Type) Value { + switch t.Underlying().(type) { + case *types.Struct, *types.Array: + return emitLoad(f, f.addLocal(t, token.NoPos)) + default: + return zeroConst(t) + } +} + +// createRecoverBlock emits to f a block of code to return after a +// recovered panic, and sets f.Recover to it. +// +// If f's result parameters are named, the code loads and returns +// their current values, otherwise it returns the zero values of their +// type. +// +// Idempotent. +// +func createRecoverBlock(f *Function) { + if f.Recover != nil { + return // already created + } + saved := f.currentBlock + + f.Recover = f.newBasicBlock("recover") + f.currentBlock = f.Recover + + var results []Value + if f.namedResults != nil { + // Reload NRPs to form value tuple. + for _, r := range f.namedResults { + results = append(results, emitLoad(f, r)) + } + } else { + R := f.Signature.Results() + for i, n := 0, R.Len(); i < n; i++ { + T := R.At(i).Type() + + // Return zero value of each result type. + results = append(results, zeroValue(f, T)) + } + } + f.emit(&Return{Results: results}) + + f.currentBlock = saved +} diff --git a/vendor/golang.org/x/tools/go/ssa/func.go b/vendor/golang.org/x/tools/go/ssa/func.go new file mode 100644 index 0000000..a9c0f75 --- /dev/null +++ b/vendor/golang.org/x/tools/go/ssa/func.go @@ -0,0 +1,690 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package ssa + +// This file implements the Function and BasicBlock types. + +import ( + "bytes" + "fmt" + "go/ast" + "go/token" + "io" + "os" + "strings" + + "golang.org/x/tools/go/types" +) + +// addEdge adds a control-flow graph edge from from to to. +func addEdge(from, to *BasicBlock) { + from.Succs = append(from.Succs, to) + to.Preds = append(to.Preds, from) +} + +// Parent returns the function that contains block b. +func (b *BasicBlock) Parent() *Function { return b.parent } + +// String returns a human-readable label of this block. +// It is not guaranteed unique within the function. +// +func (b *BasicBlock) String() string { + return fmt.Sprintf("%d", b.Index) +} + +// emit appends an instruction to the current basic block. +// If the instruction defines a Value, it is returned. +// +func (b *BasicBlock) emit(i Instruction) Value { + i.setBlock(b) + b.Instrs = append(b.Instrs, i) + v, _ := i.(Value) + return v +} + +// predIndex returns the i such that b.Preds[i] == c or panics if +// there is none. +func (b *BasicBlock) predIndex(c *BasicBlock) int { + for i, pred := range b.Preds { + if pred == c { + return i + } + } + panic(fmt.Sprintf("no edge %s -> %s", c, b)) +} + +// hasPhi returns true if b.Instrs contains φ-nodes. +func (b *BasicBlock) hasPhi() bool { + _, ok := b.Instrs[0].(*Phi) + return ok +} + +// phis returns the prefix of b.Instrs containing all the block's φ-nodes. +func (b *BasicBlock) phis() []Instruction { + for i, instr := range b.Instrs { + if _, ok := instr.(*Phi); !ok { + return b.Instrs[:i] + } + } + return nil // unreachable in well-formed blocks +} + +// replacePred replaces all occurrences of p in b's predecessor list with q. +// Ordinarily there should be at most one. +// +func (b *BasicBlock) replacePred(p, q *BasicBlock) { + for i, pred := range b.Preds { + if pred == p { + b.Preds[i] = q + } + } +} + +// replaceSucc replaces all occurrences of p in b's successor list with q. +// Ordinarily there should be at most one. +// +func (b *BasicBlock) replaceSucc(p, q *BasicBlock) { + for i, succ := range b.Succs { + if succ == p { + b.Succs[i] = q + } + } +} + +// removePred removes all occurrences of p in b's +// predecessor list and φ-nodes. +// Ordinarily there should be at most one. +// +func (b *BasicBlock) removePred(p *BasicBlock) { + phis := b.phis() + + // We must preserve edge order for φ-nodes. + j := 0 + for i, pred := range b.Preds { + if pred != p { + b.Preds[j] = b.Preds[i] + // Strike out φ-edge too. + for _, instr := range phis { + phi := instr.(*Phi) + phi.Edges[j] = phi.Edges[i] + } + j++ + } + } + // Nil out b.Preds[j:] and φ-edges[j:] to aid GC. + for i := j; i < len(b.Preds); i++ { + b.Preds[i] = nil + for _, instr := range phis { + instr.(*Phi).Edges[i] = nil + } + } + b.Preds = b.Preds[:j] + for _, instr := range phis { + phi := instr.(*Phi) + phi.Edges = phi.Edges[:j] + } +} + +// Destinations associated with unlabelled for/switch/select stmts. +// We push/pop one of these as we enter/leave each construct and for +// each BranchStmt we scan for the innermost target of the right type. +// +type targets struct { + tail *targets // rest of stack + _break *BasicBlock + _continue *BasicBlock + _fallthrough *BasicBlock +} + +// Destinations associated with a labelled block. +// We populate these as labels are encountered in forward gotos or +// labelled statements. +// +type lblock struct { + _goto *BasicBlock + _break *BasicBlock + _continue *BasicBlock +} + +// labelledBlock returns the branch target associated with the +// specified label, creating it if needed. +// +func (f *Function) labelledBlock(label *ast.Ident) *lblock { + lb := f.lblocks[label.Obj] + if lb == nil { + lb = &lblock{_goto: f.newBasicBlock(label.Name)} + if f.lblocks == nil { + f.lblocks = make(map[*ast.Object]*lblock) + } + f.lblocks[label.Obj] = lb + } + return lb +} + +// addParam adds a (non-escaping) parameter to f.Params of the +// specified name, type and source position. +// +func (f *Function) addParam(name string, typ types.Type, pos token.Pos) *Parameter { + v := &Parameter{ + name: name, + typ: typ, + pos: pos, + parent: f, + } + f.Params = append(f.Params, v) + return v +} + +func (f *Function) addParamObj(obj types.Object) *Parameter { + name := obj.Name() + if name == "" { + name = fmt.Sprintf("arg%d", len(f.Params)) + } + param := f.addParam(name, obj.Type(), obj.Pos()) + param.object = obj + return param +} + +// addSpilledParam declares a parameter that is pre-spilled to the +// stack; the function body will load/store the spilled location. +// Subsequent lifting will eliminate spills where possible. +// +func (f *Function) addSpilledParam(obj types.Object) { + param := f.addParamObj(obj) + spill := &Alloc{Comment: obj.Name()} + spill.setType(types.NewPointer(obj.Type())) + spill.setPos(obj.Pos()) + f.objects[obj] = spill + f.Locals = append(f.Locals, spill) + f.emit(spill) + f.emit(&Store{Addr: spill, Val: param}) +} + +// startBody initializes the function prior to generating SSA code for its body. +// Precondition: f.Type() already set. +// +func (f *Function) startBody() { + f.currentBlock = f.newBasicBlock("entry") + f.objects = make(map[types.Object]Value) // needed for some synthetics, e.g. init +} + +// createSyntacticParams populates f.Params and generates code (spills +// and named result locals) for all the parameters declared in the +// syntax. In addition it populates the f.objects mapping. +// +// Preconditions: +// f.startBody() was called. +// Postcondition: +// len(f.Params) == len(f.Signature.Params) + (f.Signature.Recv() ? 1 : 0) +// +func (f *Function) createSyntacticParams(recv *ast.FieldList, functype *ast.FuncType) { + // Receiver (at most one inner iteration). + if recv != nil { + for _, field := range recv.List { + for _, n := range field.Names { + f.addSpilledParam(f.Pkg.info.Defs[n]) + } + // Anonymous receiver? No need to spill. + if field.Names == nil { + f.addParamObj(f.Signature.Recv()) + } + } + } + + // Parameters. + if functype.Params != nil { + n := len(f.Params) // 1 if has recv, 0 otherwise + for _, field := range functype.Params.List { + for _, n := range field.Names { + f.addSpilledParam(f.Pkg.info.Defs[n]) + } + // Anonymous parameter? No need to spill. + if field.Names == nil { + f.addParamObj(f.Signature.Params().At(len(f.Params) - n)) + } + } + } + + // Named results. + if functype.Results != nil { + for _, field := range functype.Results.List { + // Implicit "var" decl of locals for named results. + for _, n := range field.Names { + f.namedResults = append(f.namedResults, f.addLocalForIdent(n)) + } + } + } +} + +// numberRegisters assigns numbers to all SSA registers +// (value-defining Instructions) in f, to aid debugging. +// (Non-Instruction Values are named at construction.) +// +func numberRegisters(f *Function) { + v := 0 + for _, b := range f.Blocks { + for _, instr := range b.Instrs { + switch instr.(type) { + case Value: + instr.(interface { + setNum(int) + }).setNum(v) + v++ + } + } + } +} + +// buildReferrers populates the def/use information in all non-nil +// Value.Referrers slice. +// Precondition: all such slices are initially empty. +func buildReferrers(f *Function) { + var rands []*Value + for _, b := range f.Blocks { + for _, instr := range b.Instrs { + rands = instr.Operands(rands[:0]) // recycle storage + for _, rand := range rands { + if r := *rand; r != nil { + if ref := r.Referrers(); ref != nil { + *ref = append(*ref, instr) + } + } + } + } + } +} + +// finishBody() finalizes the function after SSA code generation of its body. +func (f *Function) finishBody() { + f.objects = nil + f.currentBlock = nil + f.lblocks = nil + + // Don't pin the AST in memory (except in debug mode). + if n := f.syntax; n != nil && !f.debugInfo() { + f.syntax = extentNode{n.Pos(), n.End()} + } + + // Remove from f.Locals any Allocs that escape to the heap. + j := 0 + for _, l := range f.Locals { + if !l.Heap { + f.Locals[j] = l + j++ + } + } + // Nil out f.Locals[j:] to aid GC. + for i := j; i < len(f.Locals); i++ { + f.Locals[i] = nil + } + f.Locals = f.Locals[:j] + + optimizeBlocks(f) + + buildReferrers(f) + + buildDomTree(f) + + if f.Prog.mode&NaiveForm == 0 { + // For debugging pre-state of lifting pass: + // numberRegisters(f) + // f.WriteTo(os.Stderr) + lift(f) + } + + f.namedResults = nil // (used by lifting) + + numberRegisters(f) + + if f.Prog.mode&PrintFunctions != 0 { + printMu.Lock() + f.WriteTo(os.Stdout) + printMu.Unlock() + } + + if f.Prog.mode&SanityCheckFunctions != 0 { + mustSanityCheck(f, nil) + } +} + +// removeNilBlocks eliminates nils from f.Blocks and updates each +// BasicBlock.Index. Use this after any pass that may delete blocks. +// +func (f *Function) removeNilBlocks() { + j := 0 + for _, b := range f.Blocks { + if b != nil { + b.Index = j + f.Blocks[j] = b + j++ + } + } + // Nil out f.Blocks[j:] to aid GC. + for i := j; i < len(f.Blocks); i++ { + f.Blocks[i] = nil + } + f.Blocks = f.Blocks[:j] +} + +// SetDebugMode sets the debug mode for package pkg. If true, all its +// functions will include full debug info. This greatly increases the +// size of the instruction stream, and causes Functions to depend upon +// the ASTs, potentially keeping them live in memory for longer. +// +func (pkg *Package) SetDebugMode(debug bool) { + // TODO(adonovan): do we want ast.File granularity? + pkg.debug = debug +} + +// debugInfo reports whether debug info is wanted for this function. +func (f *Function) debugInfo() bool { + return f.Pkg != nil && f.Pkg.debug +} + +// addNamedLocal creates a local variable, adds it to function f and +// returns it. Its name and type are taken from obj. Subsequent +// calls to f.lookup(obj) will return the same local. +// +func (f *Function) addNamedLocal(obj types.Object) *Alloc { + l := f.addLocal(obj.Type(), obj.Pos()) + l.Comment = obj.Name() + f.objects[obj] = l + return l +} + +func (f *Function) addLocalForIdent(id *ast.Ident) *Alloc { + return f.addNamedLocal(f.Pkg.info.Defs[id]) +} + +// addLocal creates an anonymous local variable of type typ, adds it +// to function f and returns it. pos is the optional source location. +// +func (f *Function) addLocal(typ types.Type, pos token.Pos) *Alloc { + v := &Alloc{} + v.setType(types.NewPointer(typ)) + v.setPos(pos) + f.Locals = append(f.Locals, v) + f.emit(v) + return v +} + +// lookup returns the address of the named variable identified by obj +// that is local to function f or one of its enclosing functions. +// If escaping, the reference comes from a potentially escaping pointer +// expression and the referent must be heap-allocated. +// +func (f *Function) lookup(obj types.Object, escaping bool) Value { + if v, ok := f.objects[obj]; ok { + if alloc, ok := v.(*Alloc); ok && escaping { + alloc.Heap = true + } + return v // function-local var (address) + } + + // Definition must be in an enclosing function; + // plumb it through intervening closures. + if f.parent == nil { + panic("no ssa.Value for " + obj.String()) + } + outer := f.parent.lookup(obj, true) // escaping + v := &FreeVar{ + name: obj.Name(), + typ: outer.Type(), + pos: outer.Pos(), + outer: outer, + parent: f, + } + f.objects[obj] = v + f.FreeVars = append(f.FreeVars, v) + return v +} + +// emit emits the specified instruction to function f. +func (f *Function) emit(instr Instruction) Value { + return f.currentBlock.emit(instr) +} + +// RelString returns the full name of this function, qualified by +// package name, receiver type, etc. +// +// The specific formatting rules are not guaranteed and may change. +// +// Examples: +// "math.IsNaN" // a package-level function +// "(*bytes.Buffer).Bytes" // a declared method or a wrapper +// "(*bytes.Buffer).Bytes$thunk" // thunk (func wrapping method; receiver is param 0) +// "(*bytes.Buffer).Bytes$bound" // bound (func wrapping method; receiver supplied by closure) +// "main.main$1" // an anonymous function in main +// "main.init#1" // a declared init function +// "main.init" // the synthesized package initializer +// +// When these functions are referred to from within the same package +// (i.e. from == f.Pkg.Object), they are rendered without the package path. +// For example: "IsNaN", "(*Buffer).Bytes", etc. +// +// All non-synthetic functions have distinct package-qualified names. +// (But two methods may have the same name "(T).f" if one is a synthetic +// wrapper promoting a non-exported method "f" from another package; in +// that case, the strings are equal but the identifiers "f" are distinct.) +// +func (f *Function) RelString(from *types.Package) string { + // Anonymous? + if f.parent != nil { + // An anonymous function's Name() looks like "parentName$1", + // but its String() should include the type/package/etc. + parent := f.parent.RelString(from) + for i, anon := range f.parent.AnonFuncs { + if anon == f { + return fmt.Sprintf("%s$%d", parent, 1+i) + } + } + + return f.name // should never happen + } + + // Method (declared or wrapper)? + if recv := f.Signature.Recv(); recv != nil { + return f.relMethod(from, recv.Type()) + } + + // Thunk? + if f.method != nil { + return f.relMethod(from, f.method.Recv()) + } + + // Bound? + if len(f.FreeVars) == 1 && strings.HasSuffix(f.name, "$bound") { + return f.relMethod(from, f.FreeVars[0].Type()) + } + + // Package-level function? + // Prefix with package name for cross-package references only. + if p := f.pkgobj(); p != nil && p != from { + return fmt.Sprintf("%s.%s", p.Path(), f.name) + } + + // Unknown. + return f.name +} + +func (f *Function) relMethod(from *types.Package, recv types.Type) string { + return fmt.Sprintf("(%s).%s", relType(recv, from), f.name) +} + +// writeSignature writes to buf the signature sig in declaration syntax. +func writeSignature(buf *bytes.Buffer, from *types.Package, name string, sig *types.Signature, params []*Parameter) { + buf.WriteString("func ") + if recv := sig.Recv(); recv != nil { + buf.WriteString("(") + if n := params[0].Name(); n != "" { + buf.WriteString(n) + buf.WriteString(" ") + } + types.WriteType(buf, params[0].Type(), types.RelativeTo(from)) + buf.WriteString(") ") + } + buf.WriteString(name) + types.WriteSignature(buf, sig, types.RelativeTo(from)) +} + +func (f *Function) pkgobj() *types.Package { + if f.Pkg != nil { + return f.Pkg.Object + } + return nil +} + +var _ io.WriterTo = (*Function)(nil) // *Function implements io.Writer + +func (f *Function) WriteTo(w io.Writer) (int64, error) { + var buf bytes.Buffer + WriteFunction(&buf, f) + n, err := w.Write(buf.Bytes()) + return int64(n), err +} + +// WriteFunction writes to buf a human-readable "disassembly" of f. +func WriteFunction(buf *bytes.Buffer, f *Function) { + fmt.Fprintf(buf, "# Name: %s\n", f.String()) + if f.Pkg != nil { + fmt.Fprintf(buf, "# Package: %s\n", f.Pkg.Object.Path()) + } + if syn := f.Synthetic; syn != "" { + fmt.Fprintln(buf, "# Synthetic:", syn) + } + if pos := f.Pos(); pos.IsValid() { + fmt.Fprintf(buf, "# Location: %s\n", f.Prog.Fset.Position(pos)) + } + + if f.parent != nil { + fmt.Fprintf(buf, "# Parent: %s\n", f.parent.Name()) + } + + if f.Recover != nil { + fmt.Fprintf(buf, "# Recover: %s\n", f.Recover) + } + + from := f.pkgobj() + + if f.FreeVars != nil { + buf.WriteString("# Free variables:\n") + for i, fv := range f.FreeVars { + fmt.Fprintf(buf, "# % 3d:\t%s %s\n", i, fv.Name(), relType(fv.Type(), from)) + } + } + + if len(f.Locals) > 0 { + buf.WriteString("# Locals:\n") + for i, l := range f.Locals { + fmt.Fprintf(buf, "# % 3d:\t%s %s\n", i, l.Name(), relType(deref(l.Type()), from)) + } + } + writeSignature(buf, from, f.Name(), f.Signature, f.Params) + buf.WriteString(":\n") + + if f.Blocks == nil { + buf.WriteString("\t(external)\n") + } + + // NB. column calculations are confused by non-ASCII + // characters and assume 8-space tabs. + const punchcard = 80 // for old time's sake. + const tabwidth = 8 + for _, b := range f.Blocks { + if b == nil { + // Corrupt CFG. + fmt.Fprintf(buf, ".nil:\n") + continue + } + n, _ := fmt.Fprintf(buf, "%d:", b.Index) + bmsg := fmt.Sprintf("%s P:%d S:%d", b.Comment, len(b.Preds), len(b.Succs)) + fmt.Fprintf(buf, "%*s%s\n", punchcard-1-n-len(bmsg), "", bmsg) + + if false { // CFG debugging + fmt.Fprintf(buf, "\t# CFG: %s --> %s --> %s\n", b.Preds, b, b.Succs) + } + for _, instr := range b.Instrs { + buf.WriteString("\t") + switch v := instr.(type) { + case Value: + l := punchcard - tabwidth + // Left-align the instruction. + if name := v.Name(); name != "" { + n, _ := fmt.Fprintf(buf, "%s = ", name) + l -= n + } + n, _ := buf.WriteString(instr.String()) + l -= n + // Right-align the type if there's space. + if t := v.Type(); t != nil { + buf.WriteByte(' ') + ts := relType(t, from) + l -= len(ts) + len(" ") // (spaces before and after type) + if l > 0 { + fmt.Fprintf(buf, "%*s", l, "") + } + buf.WriteString(ts) + } + case nil: + // Be robust against bad transforms. + buf.WriteString("") + default: + buf.WriteString(instr.String()) + } + buf.WriteString("\n") + } + } + fmt.Fprintf(buf, "\n") +} + +// newBasicBlock adds to f a new basic block and returns it. It does +// not automatically become the current block for subsequent calls to emit. +// comment is an optional string for more readable debugging output. +// +func (f *Function) newBasicBlock(comment string) *BasicBlock { + b := &BasicBlock{ + Index: len(f.Blocks), + Comment: comment, + parent: f, + } + b.Succs = b.succs2[:0] + f.Blocks = append(f.Blocks, b) + return b +} + +// NewFunction returns a new synthetic Function instance belonging to +// prog, with its name and signature fields set as specified. +// +// The caller is responsible for initializing the remaining fields of +// the function object, e.g. Pkg, Params, Blocks. +// +// It is practically impossible for clients to construct well-formed +// SSA functions/packages/programs directly, so we assume this is the +// job of the Builder alone. NewFunction exists to provide clients a +// little flexibility. For example, analysis tools may wish to +// construct fake Functions for the root of the callgraph, a fake +// "reflect" package, etc. +// +// TODO(adonovan): think harder about the API here. +// +func (prog *Program) NewFunction(name string, sig *types.Signature, provenance string) *Function { + return &Function{Prog: prog, name: name, Signature: sig, Synthetic: provenance} +} + +type extentNode [2]token.Pos + +func (n extentNode) Pos() token.Pos { return n[0] } +func (n extentNode) End() token.Pos { return n[1] } + +// Syntax returns an ast.Node whose Pos/End methods provide the +// lexical extent of the function if it was defined by Go source code +// (f.Synthetic==""), or nil otherwise. +// +// If f was built with debug information (see Package.SetDebugRef), +// the result is the *ast.FuncDecl or *ast.FuncLit that declared the +// function. Otherwise, it is an opaque Node providing only position +// information; this avoids pinning the AST in memory. +// +func (f *Function) Syntax() ast.Node { return f.syntax } diff --git a/vendor/golang.org/x/tools/go/ssa/lift.go b/vendor/golang.org/x/tools/go/ssa/lift.go new file mode 100644 index 0000000..3771f61 --- /dev/null +++ b/vendor/golang.org/x/tools/go/ssa/lift.go @@ -0,0 +1,599 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package ssa + +// This file defines the lifting pass which tries to "lift" Alloc +// cells (new/local variables) into SSA registers, replacing loads +// with the dominating stored value, eliminating loads and stores, and +// inserting φ-nodes as needed. + +// Cited papers and resources: +// +// Ron Cytron et al. 1991. Efficiently computing SSA form... +// http://doi.acm.org/10.1145/115372.115320 +// +// Cooper, Harvey, Kennedy. 2001. A Simple, Fast Dominance Algorithm. +// Software Practice and Experience 2001, 4:1-10. +// http://www.hipersoft.rice.edu/grads/publications/dom14.pdf +// +// Daniel Berlin, llvmdev mailing list, 2012. +// http://lists.cs.uiuc.edu/pipermail/llvmdev/2012-January/046638.html +// (Be sure to expand the whole thread.) + +// TODO(adonovan): opt: there are many optimizations worth evaluating, and +// the conventional wisdom for SSA construction is that a simple +// algorithm well engineered often beats those of better asymptotic +// complexity on all but the most egregious inputs. +// +// Danny Berlin suggests that the Cooper et al. algorithm for +// computing the dominance frontier is superior to Cytron et al. +// Furthermore he recommends that rather than computing the DF for the +// whole function then renaming all alloc cells, it may be cheaper to +// compute the DF for each alloc cell separately and throw it away. +// +// Consider exploiting liveness information to avoid creating dead +// φ-nodes which we then immediately remove. +// +// Integrate lifting with scalar replacement of aggregates (SRA) since +// the two are synergistic. +// +// Also see many other "TODO: opt" suggestions in the code. + +import ( + "fmt" + "go/token" + "math/big" + "os" + + "golang.org/x/tools/go/types" +) + +// If true, perform sanity checking and show diagnostic information at +// each step of lifting. Very verbose. +const debugLifting = false + +// domFrontier maps each block to the set of blocks in its dominance +// frontier. The outer slice is conceptually a map keyed by +// Block.Index. The inner slice is conceptually a set, possibly +// containing duplicates. +// +// TODO(adonovan): opt: measure impact of dups; consider a packed bit +// representation, e.g. big.Int, and bitwise parallel operations for +// the union step in the Children loop. +// +// domFrontier's methods mutate the slice's elements but not its +// length, so their receivers needn't be pointers. +// +type domFrontier [][]*BasicBlock + +func (df domFrontier) add(u, v *BasicBlock) { + p := &df[u.Index] + *p = append(*p, v) +} + +// build builds the dominance frontier df for the dominator (sub)tree +// rooted at u, using the Cytron et al. algorithm. +// +// TODO(adonovan): opt: consider Berlin approach, computing pruned SSA +// by pruning the entire IDF computation, rather than merely pruning +// the DF -> IDF step. +func (df domFrontier) build(u *BasicBlock) { + // Encounter each node u in postorder of dom tree. + for _, child := range u.dom.children { + df.build(child) + } + for _, vb := range u.Succs { + if v := vb.dom; v.idom != u { + df.add(u, vb) + } + } + for _, w := range u.dom.children { + for _, vb := range df[w.Index] { + // TODO(adonovan): opt: use word-parallel bitwise union. + if v := vb.dom; v.idom != u { + df.add(u, vb) + } + } + } +} + +func buildDomFrontier(fn *Function) domFrontier { + df := make(domFrontier, len(fn.Blocks)) + df.build(fn.Blocks[0]) + if fn.Recover != nil { + df.build(fn.Recover) + } + return df +} + +func removeInstr(refs []Instruction, instr Instruction) []Instruction { + i := 0 + for _, ref := range refs { + if ref == instr { + continue + } + refs[i] = ref + i++ + } + for j := i; j != len(refs); j++ { + refs[j] = nil // aid GC + } + return refs[:i] +} + +// lift attempts to replace local and new Allocs accessed only with +// load/store by SSA registers, inserting φ-nodes where necessary. +// The result is a program in classical pruned SSA form. +// +// Preconditions: +// - fn has no dead blocks (blockopt has run). +// - Def/use info (Operands and Referrers) is up-to-date. +// - The dominator tree is up-to-date. +// +func lift(fn *Function) { + // TODO(adonovan): opt: lots of little optimizations may be + // worthwhile here, especially if they cause us to avoid + // buildDomFrontier. For example: + // + // - Alloc never loaded? Eliminate. + // - Alloc never stored? Replace all loads with a zero constant. + // - Alloc stored once? Replace loads with dominating store; + // don't forget that an Alloc is itself an effective store + // of zero. + // - Alloc used only within a single block? + // Use degenerate algorithm avoiding φ-nodes. + // - Consider synergy with scalar replacement of aggregates (SRA). + // e.g. *(&x.f) where x is an Alloc. + // Perhaps we'd get better results if we generated this as x.f + // i.e. Field(x, .f) instead of Load(FieldIndex(x, .f)). + // Unclear. + // + // But we will start with the simplest correct code. + df := buildDomFrontier(fn) + + if debugLifting { + title := false + for i, blocks := range df { + if blocks != nil { + if !title { + fmt.Fprintf(os.Stderr, "Dominance frontier of %s:\n", fn) + title = true + } + fmt.Fprintf(os.Stderr, "\t%s: %s\n", fn.Blocks[i], blocks) + } + } + } + + newPhis := make(newPhiMap) + + // During this pass we will replace some BasicBlock.Instrs + // (allocs, loads and stores) with nil, keeping a count in + // BasicBlock.gaps. At the end we will reset Instrs to the + // concatenation of all non-dead newPhis and non-nil Instrs + // for the block, reusing the original array if space permits. + + // While we're here, we also eliminate 'rundefers' + // instructions in functions that contain no 'defer' + // instructions. + usesDefer := false + + // Determine which allocs we can lift and number them densely. + // The renaming phase uses this numbering for compact maps. + numAllocs := 0 + for _, b := range fn.Blocks { + b.gaps = 0 + b.rundefers = 0 + for _, instr := range b.Instrs { + switch instr := instr.(type) { + case *Alloc: + index := -1 + if liftAlloc(df, instr, newPhis) { + index = numAllocs + numAllocs++ + } + instr.index = index + case *Defer: + usesDefer = true + case *RunDefers: + b.rundefers++ + } + } + } + + // renaming maps an alloc (keyed by index) to its replacement + // value. Initially the renaming contains nil, signifying the + // zero constant of the appropriate type; we construct the + // Const lazily at most once on each path through the domtree. + // TODO(adonovan): opt: cache per-function not per subtree. + renaming := make([]Value, numAllocs) + + // Renaming. + rename(fn.Blocks[0], renaming, newPhis) + + // Eliminate dead new phis, then prepend the live ones to each block. + for _, b := range fn.Blocks { + + // Compress the newPhis slice to eliminate unused phis. + // TODO(adonovan): opt: compute liveness to avoid + // placing phis in blocks for which the alloc cell is + // not live. + nps := newPhis[b] + j := 0 + for _, np := range nps { + if !phiIsLive(np.phi) { + // discard it, first removing it from referrers + for _, newval := range np.phi.Edges { + if refs := newval.Referrers(); refs != nil { + *refs = removeInstr(*refs, np.phi) + } + } + continue + } + nps[j] = np + j++ + } + nps = nps[:j] + + rundefersToKill := b.rundefers + if usesDefer { + rundefersToKill = 0 + } + + if j+b.gaps+rundefersToKill == 0 { + continue // fast path: no new phis or gaps + } + + // Compact nps + non-nil Instrs into a new slice. + // TODO(adonovan): opt: compact in situ if there is + // sufficient space or slack in the slice. + dst := make([]Instruction, len(b.Instrs)+j-b.gaps-rundefersToKill) + for i, np := range nps { + dst[i] = np.phi + } + for _, instr := range b.Instrs { + if instr == nil { + continue + } + if !usesDefer { + if _, ok := instr.(*RunDefers); ok { + continue + } + } + dst[j] = instr + j++ + } + for i, np := range nps { + dst[i] = np.phi + } + b.Instrs = dst + } + + // Remove any fn.Locals that were lifted. + j := 0 + for _, l := range fn.Locals { + if l.index < 0 { + fn.Locals[j] = l + j++ + } + } + // Nil out fn.Locals[j:] to aid GC. + for i := j; i < len(fn.Locals); i++ { + fn.Locals[i] = nil + } + fn.Locals = fn.Locals[:j] +} + +func phiIsLive(phi *Phi) bool { + for _, instr := range *phi.Referrers() { + if instr == phi { + continue // self-refs don't count + } + if _, ok := instr.(*DebugRef); ok { + continue // debug refs don't count + } + return true + } + return false +} + +type blockSet struct{ big.Int } // (inherit methods from Int) + +// add adds b to the set and returns true if the set changed. +func (s *blockSet) add(b *BasicBlock) bool { + i := b.Index + if s.Bit(i) != 0 { + return false + } + s.SetBit(&s.Int, i, 1) + return true +} + +// take removes an arbitrary element from a set s and +// returns its index, or returns -1 if empty. +func (s *blockSet) take() int { + l := s.BitLen() + for i := 0; i < l; i++ { + if s.Bit(i) == 1 { + s.SetBit(&s.Int, i, 0) + return i + } + } + return -1 +} + +// newPhi is a pair of a newly introduced φ-node and the lifted Alloc +// it replaces. +type newPhi struct { + phi *Phi + alloc *Alloc +} + +// newPhiMap records for each basic block, the set of newPhis that +// must be prepended to the block. +type newPhiMap map[*BasicBlock][]newPhi + +// liftAlloc determines whether alloc can be lifted into registers, +// and if so, it populates newPhis with all the φ-nodes it may require +// and returns true. +// +func liftAlloc(df domFrontier, alloc *Alloc, newPhis newPhiMap) bool { + // Don't lift aggregates into registers, because we don't have + // a way to express their zero-constants. + switch deref(alloc.Type()).Underlying().(type) { + case *types.Array, *types.Struct: + return false + } + + // Don't lift named return values in functions that defer + // calls that may recover from panic. + if fn := alloc.Parent(); fn.Recover != nil { + for _, nr := range fn.namedResults { + if nr == alloc { + return false + } + } + } + + // Compute defblocks, the set of blocks containing a + // definition of the alloc cell. + var defblocks blockSet + for _, instr := range *alloc.Referrers() { + // Bail out if we discover the alloc is not liftable; + // the only operations permitted to use the alloc are + // loads/stores into the cell, and DebugRef. + switch instr := instr.(type) { + case *Store: + if instr.Val == alloc { + return false // address used as value + } + if instr.Addr != alloc { + panic("Alloc.Referrers is inconsistent") + } + defblocks.add(instr.Block()) + case *UnOp: + if instr.Op != token.MUL { + return false // not a load + } + if instr.X != alloc { + panic("Alloc.Referrers is inconsistent") + } + case *DebugRef: + // ok + default: + return false // some other instruction + } + } + // The Alloc itself counts as a (zero) definition of the cell. + defblocks.add(alloc.Block()) + + if debugLifting { + fmt.Fprintln(os.Stderr, "\tlifting ", alloc, alloc.Name()) + } + + fn := alloc.Parent() + + // Φ-insertion. + // + // What follows is the body of the main loop of the insert-φ + // function described by Cytron et al, but instead of using + // counter tricks, we just reset the 'hasAlready' and 'work' + // sets each iteration. These are bitmaps so it's pretty cheap. + // + // TODO(adonovan): opt: recycle slice storage for W, + // hasAlready, defBlocks across liftAlloc calls. + var hasAlready blockSet + + // Initialize W and work to defblocks. + var work blockSet = defblocks // blocks seen + var W blockSet // blocks to do + W.Set(&defblocks.Int) + + // Traverse iterated dominance frontier, inserting φ-nodes. + for i := W.take(); i != -1; i = W.take() { + u := fn.Blocks[i] + for _, v := range df[u.Index] { + if hasAlready.add(v) { + // Create φ-node. + // It will be prepended to v.Instrs later, if needed. + phi := &Phi{ + Edges: make([]Value, len(v.Preds)), + Comment: alloc.Comment, + } + phi.pos = alloc.Pos() + phi.setType(deref(alloc.Type())) + phi.block = v + if debugLifting { + fmt.Fprintf(os.Stderr, "\tplace %s = %s at block %s\n", phi.Name(), phi, v) + } + newPhis[v] = append(newPhis[v], newPhi{phi, alloc}) + + if work.add(v) { + W.add(v) + } + } + } + } + + return true +} + +// replaceAll replaces all intraprocedural uses of x with y, +// updating x.Referrers and y.Referrers. +// Precondition: x.Referrers() != nil, i.e. x must be local to some function. +// +func replaceAll(x, y Value) { + var rands []*Value + pxrefs := x.Referrers() + pyrefs := y.Referrers() + for _, instr := range *pxrefs { + rands = instr.Operands(rands[:0]) // recycle storage + for _, rand := range rands { + if *rand != nil { + if *rand == x { + *rand = y + } + } + } + if pyrefs != nil { + *pyrefs = append(*pyrefs, instr) // dups ok + } + } + *pxrefs = nil // x is now unreferenced +} + +// renamed returns the value to which alloc is being renamed, +// constructing it lazily if it's the implicit zero initialization. +// +func renamed(renaming []Value, alloc *Alloc) Value { + v := renaming[alloc.index] + if v == nil { + v = zeroConst(deref(alloc.Type())) + renaming[alloc.index] = v + } + return v +} + +// rename implements the (Cytron et al) SSA renaming algorithm, a +// preorder traversal of the dominator tree replacing all loads of +// Alloc cells with the value stored to that cell by the dominating +// store instruction. For lifting, we need only consider loads, +// stores and φ-nodes. +// +// renaming is a map from *Alloc (keyed by index number) to its +// dominating stored value; newPhis[x] is the set of new φ-nodes to be +// prepended to block x. +// +func rename(u *BasicBlock, renaming []Value, newPhis newPhiMap) { + // Each φ-node becomes the new name for its associated Alloc. + for _, np := range newPhis[u] { + phi := np.phi + alloc := np.alloc + renaming[alloc.index] = phi + } + + // Rename loads and stores of allocs. + for i, instr := range u.Instrs { + switch instr := instr.(type) { + case *Alloc: + if instr.index >= 0 { // store of zero to Alloc cell + // Replace dominated loads by the zero value. + renaming[instr.index] = nil + if debugLifting { + fmt.Fprintf(os.Stderr, "\tkill alloc %s\n", instr) + } + // Delete the Alloc. + u.Instrs[i] = nil + u.gaps++ + } + + case *Store: + if alloc, ok := instr.Addr.(*Alloc); ok && alloc.index >= 0 { // store to Alloc cell + // Replace dominated loads by the stored value. + renaming[alloc.index] = instr.Val + if debugLifting { + fmt.Fprintf(os.Stderr, "\tkill store %s; new value: %s\n", + instr, instr.Val.Name()) + } + // Remove the store from the referrer list of the stored value. + if refs := instr.Val.Referrers(); refs != nil { + *refs = removeInstr(*refs, instr) + } + // Delete the Store. + u.Instrs[i] = nil + u.gaps++ + } + + case *UnOp: + if instr.Op == token.MUL { + if alloc, ok := instr.X.(*Alloc); ok && alloc.index >= 0 { // load of Alloc cell + newval := renamed(renaming, alloc) + if debugLifting { + fmt.Fprintf(os.Stderr, "\tupdate load %s = %s with %s\n", + instr.Name(), instr, newval.Name()) + } + // Replace all references to + // the loaded value by the + // dominating stored value. + replaceAll(instr, newval) + // Delete the Load. + u.Instrs[i] = nil + u.gaps++ + } + } + + case *DebugRef: + if alloc, ok := instr.X.(*Alloc); ok && alloc.index >= 0 { // ref of Alloc cell + if instr.IsAddr { + instr.X = renamed(renaming, alloc) + instr.IsAddr = false + + // Add DebugRef to instr.X's referrers. + if refs := instr.X.Referrers(); refs != nil { + *refs = append(*refs, instr) + } + } else { + // A source expression denotes the address + // of an Alloc that was optimized away. + instr.X = nil + + // Delete the DebugRef. + u.Instrs[i] = nil + u.gaps++ + } + } + } + } + + // For each φ-node in a CFG successor, rename the edge. + for _, v := range u.Succs { + phis := newPhis[v] + if len(phis) == 0 { + continue + } + i := v.predIndex(u) + for _, np := range phis { + phi := np.phi + alloc := np.alloc + newval := renamed(renaming, alloc) + if debugLifting { + fmt.Fprintf(os.Stderr, "\tsetphi %s edge %s -> %s (#%d) (alloc=%s) := %s\n", + phi.Name(), u, v, i, alloc.Name(), newval.Name()) + } + phi.Edges[i] = newval + if prefs := newval.Referrers(); prefs != nil { + *prefs = append(*prefs, phi) + } + } + } + + // Continue depth-first recursion over domtree, pushing a + // fresh copy of the renaming map for each subtree. + for _, v := range u.dom.children { + // TODO(adonovan): opt: avoid copy on final iteration; use destructive update. + r := make([]Value, len(renaming)) + copy(r, renaming) + rename(v, r, newPhis) + } +} diff --git a/vendor/golang.org/x/tools/go/ssa/lvalue.go b/vendor/golang.org/x/tools/go/ssa/lvalue.go new file mode 100644 index 0000000..4284b1c --- /dev/null +++ b/vendor/golang.org/x/tools/go/ssa/lvalue.go @@ -0,0 +1,121 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package ssa + +// lvalues are the union of addressable expressions and map-index +// expressions. + +import ( + "go/ast" + "go/token" + + "golang.org/x/tools/go/types" +) + +// An lvalue represents an assignable location that may appear on the +// left-hand side of an assignment. This is a generalization of a +// pointer to permit updates to elements of maps. +// +type lvalue interface { + store(fn *Function, v Value) // stores v into the location + load(fn *Function) Value // loads the contents of the location + address(fn *Function) Value // address of the location + typ() types.Type // returns the type of the location +} + +// An address is an lvalue represented by a true pointer. +type address struct { + addr Value + pos token.Pos // source position + expr ast.Expr // source syntax of the value (not address) [debug mode] +} + +func (a *address) load(fn *Function) Value { + load := emitLoad(fn, a.addr) + load.pos = a.pos + return load +} + +func (a *address) store(fn *Function, v Value) { + store := emitStore(fn, a.addr, v, a.pos) + if a.expr != nil { + // store.Val is v, converted for assignability. + emitDebugRef(fn, a.expr, store.Val, false) + } +} + +func (a *address) address(fn *Function) Value { + if a.expr != nil { + emitDebugRef(fn, a.expr, a.addr, true) + } + return a.addr +} + +func (a *address) typ() types.Type { + return deref(a.addr.Type()) +} + +// An element is an lvalue represented by m[k], the location of an +// element of a map or string. These locations are not addressable +// since pointers cannot be formed from them, but they do support +// load(), and in the case of maps, store(). +// +type element struct { + m, k Value // map or string + t types.Type // map element type or string byte type + pos token.Pos // source position of colon ({k:v}) or lbrack (m[k]=v) +} + +func (e *element) load(fn *Function) Value { + l := &Lookup{ + X: e.m, + Index: e.k, + } + l.setPos(e.pos) + l.setType(e.t) + return fn.emit(l) +} + +func (e *element) store(fn *Function, v Value) { + up := &MapUpdate{ + Map: e.m, + Key: e.k, + Value: emitConv(fn, v, e.t), + } + up.pos = e.pos + fn.emit(up) +} + +func (e *element) address(fn *Function) Value { + panic("map/string elements are not addressable") +} + +func (e *element) typ() types.Type { + return e.t +} + +// A blank is a dummy variable whose name is "_". +// It is not reified: loads are illegal and stores are ignored. +// +type blank struct{} + +func (bl blank) load(fn *Function) Value { + panic("blank.load is illegal") +} + +func (bl blank) store(fn *Function, v Value) { + // no-op +} + +func (bl blank) address(fn *Function) Value { + panic("blank var is not addressable") +} + +func (bl blank) typ() types.Type { + // This should be the type of the blank Ident; the typechecker + // doesn't provide this yet, but fortunately, we don't need it + // yet either. + panic("blank.typ is unimplemented") +} diff --git a/vendor/golang.org/x/tools/go/ssa/methods.go b/vendor/golang.org/x/tools/go/ssa/methods.go new file mode 100644 index 0000000..12534de --- /dev/null +++ b/vendor/golang.org/x/tools/go/ssa/methods.go @@ -0,0 +1,243 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package ssa + +// This file defines utilities for population of method sets. + +import ( + "fmt" + + "golang.org/x/tools/go/types" +) + +// Method returns the Function implementing method sel, building +// wrapper methods on demand. It returns nil if sel denotes an +// abstract (interface) method. +// +// Precondition: sel.Kind() == MethodVal. +// +// TODO(adonovan): rename this to MethodValue because of the +// precondition, and for consistency with functions in source.go. +// +// Thread-safe. +// +// EXCLUSIVE_LOCKS_ACQUIRED(prog.methodsMu) +// +func (prog *Program) Method(sel *types.Selection) *Function { + if sel.Kind() != types.MethodVal { + panic(fmt.Sprintf("Method(%s) kind != MethodVal", sel)) + } + T := sel.Recv() + if isInterface(T) { + return nil // abstract method + } + if prog.mode&LogSource != 0 { + defer logStack("Method %s %v", T, sel)() + } + + prog.methodsMu.Lock() + defer prog.methodsMu.Unlock() + + return prog.addMethod(prog.createMethodSet(T), sel) +} + +// LookupMethod returns the implementation of the method of type T +// identified by (pkg, name). It returns nil if the method exists but +// is abstract, and panics if T has no such method. +// +func (prog *Program) LookupMethod(T types.Type, pkg *types.Package, name string) *Function { + sel := prog.MethodSets.MethodSet(T).Lookup(pkg, name) + if sel == nil { + panic(fmt.Sprintf("%s has no method %s", T, types.Id(pkg, name))) + } + return prog.Method(sel) +} + +// methodSet contains the (concrete) methods of a non-interface type. +type methodSet struct { + mapping map[string]*Function // populated lazily + complete bool // mapping contains all methods +} + +// Precondition: !isInterface(T). +// EXCLUSIVE_LOCKS_REQUIRED(prog.methodsMu) +func (prog *Program) createMethodSet(T types.Type) *methodSet { + mset, ok := prog.methodSets.At(T).(*methodSet) + if !ok { + mset = &methodSet{mapping: make(map[string]*Function)} + prog.methodSets.Set(T, mset) + } + return mset +} + +// EXCLUSIVE_LOCKS_REQUIRED(prog.methodsMu) +func (prog *Program) addMethod(mset *methodSet, sel *types.Selection) *Function { + if sel.Kind() == types.MethodExpr { + panic(sel) + } + id := sel.Obj().Id() + fn := mset.mapping[id] + if fn == nil { + obj := sel.Obj().(*types.Func) + + needsPromotion := len(sel.Index()) > 1 + needsIndirection := !isPointer(recvType(obj)) && isPointer(sel.Recv()) + if needsPromotion || needsIndirection { + fn = makeWrapper(prog, sel) + } else { + fn = prog.declaredFunc(obj) + } + if fn.Signature.Recv() == nil { + panic(fn) // missing receiver + } + mset.mapping[id] = fn + } + return fn +} + +// RuntimeTypes returns a new unordered slice containing all +// concrete types in the program for which a complete (non-empty) +// method set is required at run-time. +// +// Thread-safe. +// +// EXCLUSIVE_LOCKS_ACQUIRED(prog.methodsMu) +// +func (prog *Program) RuntimeTypes() []types.Type { + prog.methodsMu.Lock() + defer prog.methodsMu.Unlock() + + var res []types.Type + prog.methodSets.Iterate(func(T types.Type, v interface{}) { + if v.(*methodSet).complete { + res = append(res, T) + } + }) + return res +} + +// declaredFunc returns the concrete function/method denoted by obj. +// Panic ensues if there is none. +// +func (prog *Program) declaredFunc(obj *types.Func) *Function { + if v := prog.packageLevelValue(obj); v != nil { + return v.(*Function) + } + panic("no concrete method: " + obj.String()) +} + +// needMethodsOf ensures that runtime type information (including the +// complete method set) is available for the specified type T and all +// its subcomponents. +// +// needMethodsOf must be called for at least every type that is an +// operand of some MakeInterface instruction, and for the type of +// every exported package member. +// +// Precondition: T is not a method signature (*Signature with Recv()!=nil). +// +// Thread-safe. (Called via emitConv from multiple builder goroutines.) +// +// TODO(adonovan): make this faster. It accounts for 20% of SSA build time. +// +// EXCLUSIVE_LOCKS_ACQUIRED(prog.methodsMu) +// +func (prog *Program) needMethodsOf(T types.Type) { + prog.methodsMu.Lock() + prog.needMethods(T, false) + prog.methodsMu.Unlock() +} + +// Precondition: T is not a method signature (*Signature with Recv()!=nil). +// Recursive case: skip => don't create methods for T. +// +// EXCLUSIVE_LOCKS_REQUIRED(prog.methodsMu) +// +func (prog *Program) needMethods(T types.Type, skip bool) { + // Each package maintains its own set of types it has visited. + if prevSkip, ok := prog.runtimeTypes.At(T).(bool); ok { + // needMethods(T) was previously called + if !prevSkip || skip { + return // already seen, with same or false 'skip' value + } + } + prog.runtimeTypes.Set(T, skip) + + tmset := prog.MethodSets.MethodSet(T) + + if !skip && !isInterface(T) && tmset.Len() > 0 { + // Create methods of T. + mset := prog.createMethodSet(T) + if !mset.complete { + mset.complete = true + n := tmset.Len() + for i := 0; i < n; i++ { + prog.addMethod(mset, tmset.At(i)) + } + } + } + + // Recursion over signatures of each method. + for i := 0; i < tmset.Len(); i++ { + sig := tmset.At(i).Type().(*types.Signature) + prog.needMethods(sig.Params(), false) + prog.needMethods(sig.Results(), false) + } + + switch t := T.(type) { + case *types.Basic: + // nop + + case *types.Interface: + // nop---handled by recursion over method set. + + case *types.Pointer: + prog.needMethods(t.Elem(), false) + + case *types.Slice: + prog.needMethods(t.Elem(), false) + + case *types.Chan: + prog.needMethods(t.Elem(), false) + + case *types.Map: + prog.needMethods(t.Key(), false) + prog.needMethods(t.Elem(), false) + + case *types.Signature: + if t.Recv() != nil { + panic(fmt.Sprintf("Signature %s has Recv %s", t, t.Recv())) + } + prog.needMethods(t.Params(), false) + prog.needMethods(t.Results(), false) + + case *types.Named: + // A pointer-to-named type can be derived from a named + // type via reflection. It may have methods too. + prog.needMethods(types.NewPointer(T), false) + + // Consider 'type T struct{S}' where S has methods. + // Reflection provides no way to get from T to struct{S}, + // only to S, so the method set of struct{S} is unwanted, + // so set 'skip' flag during recursion. + prog.needMethods(t.Underlying(), true) + + case *types.Array: + prog.needMethods(t.Elem(), false) + + case *types.Struct: + for i, n := 0, t.NumFields(); i < n; i++ { + prog.needMethods(t.Field(i).Type(), false) + } + + case *types.Tuple: + for i, n := 0, t.Len(); i < n; i++ { + prog.needMethods(t.At(i).Type(), false) + } + + default: + panic(T) + } +} diff --git a/vendor/golang.org/x/tools/go/ssa/mode.go b/vendor/golang.org/x/tools/go/ssa/mode.go new file mode 100644 index 0000000..bbd613a --- /dev/null +++ b/vendor/golang.org/x/tools/go/ssa/mode.go @@ -0,0 +1,107 @@ +// Copyright 2015 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package ssa + +// This file defines the BuilderMode type and its command-line flag. + +import ( + "bytes" + "flag" + "fmt" +) + +// BuilderMode is a bitmask of options for diagnostics and checking. +type BuilderMode uint + +const ( + PrintPackages BuilderMode = 1 << iota // Print package inventory to stdout + PrintFunctions // Print function SSA code to stdout + LogSource // Log source locations as SSA builder progresses + SanityCheckFunctions // Perform sanity checking of function bodies + NaiveForm // Build naïve SSA form: don't replace local loads/stores with registers + BuildSerially // Build packages serially, not in parallel. + GlobalDebug // Enable debug info for all packages + BareInits // Build init functions without guards or calls to dependent inits +) + +const modeFlagUsage = `Options controlling the SSA builder. +The value is a sequence of zero or more of these letters: +C perform sanity [C]hecking of the SSA form. +D include [D]ebug info for every function. +P print [P]ackage inventory. +F print [F]unction SSA code. +S log [S]ource locations as SSA builder progresses. +L build distinct packages seria[L]ly instead of in parallel. +N build [N]aive SSA form: don't replace local loads/stores with registers. +I build bare [I]nit functions: no init guards or calls to dependent inits. +` + +// BuilderModeFlag creates a new command line flag of type BuilderMode, +// adds it to the specified flag set, and returns it. +// +// Example: +// var ssabuild = BuilderModeFlag(flag.CommandLine, "ssabuild", 0) +// +func BuilderModeFlag(set *flag.FlagSet, name string, value BuilderMode) *BuilderMode { + set.Var((*builderModeValue)(&value), name, modeFlagUsage) + return &value +} + +type builderModeValue BuilderMode // satisfies flag.Value and flag.Getter. + +func (v *builderModeValue) Set(s string) error { + var mode BuilderMode + for _, c := range s { + switch c { + case 'D': + mode |= GlobalDebug + case 'P': + mode |= PrintPackages + case 'F': + mode |= PrintFunctions + case 'S': + mode |= LogSource | BuildSerially + case 'C': + mode |= SanityCheckFunctions + case 'N': + mode |= NaiveForm + case 'L': + mode |= BuildSerially + default: + return fmt.Errorf("unknown BuilderMode option: %q", c) + } + } + *v = builderModeValue(mode) + return nil +} + +func (v *builderModeValue) Get() interface{} { return BuilderMode(*v) } + +func (v *builderModeValue) String() string { + mode := BuilderMode(*v) + var buf bytes.Buffer + if mode&GlobalDebug != 0 { + buf.WriteByte('D') + } + if mode&PrintPackages != 0 { + buf.WriteByte('P') + } + if mode&PrintFunctions != 0 { + buf.WriteByte('F') + } + if mode&LogSource != 0 { + buf.WriteByte('S') + } + if mode&SanityCheckFunctions != 0 { + buf.WriteByte('C') + } + if mode&NaiveForm != 0 { + buf.WriteByte('N') + } + if mode&BuildSerially != 0 { + buf.WriteByte('L') + } + return buf.String() +} diff --git a/vendor/golang.org/x/tools/go/ssa/print.go b/vendor/golang.org/x/tools/go/ssa/print.go new file mode 100644 index 0000000..88c31f6 --- /dev/null +++ b/vendor/golang.org/x/tools/go/ssa/print.go @@ -0,0 +1,427 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package ssa + +// This file implements the String() methods for all Value and +// Instruction types. + +import ( + "bytes" + "fmt" + "io" + "reflect" + "sort" + + "golang.org/x/tools/go/types" + "golang.org/x/tools/go/types/typeutil" +) + +// relName returns the name of v relative to i. +// In most cases, this is identical to v.Name(), but references to +// Functions (including methods) and Globals use RelString and +// all types are displayed with relType, so that only cross-package +// references are package-qualified. +// +func relName(v Value, i Instruction) string { + var from *types.Package + if i != nil { + from = i.Parent().pkgobj() + } + switch v := v.(type) { + case Member: // *Function or *Global + return v.RelString(from) + case *Const: + return v.RelString(from) + } + return v.Name() +} + +func relType(t types.Type, from *types.Package) string { + return types.TypeString(t, types.RelativeTo(from)) +} + +func relString(m Member, from *types.Package) string { + // NB: not all globals have an Object (e.g. init$guard), + // so use Package().Object not Object.Package(). + if obj := m.Package().Object; obj != nil && obj != from { + return fmt.Sprintf("%s.%s", obj.Path(), m.Name()) + } + return m.Name() +} + +// Value.String() +// +// This method is provided only for debugging. +// It never appears in disassembly, which uses Value.Name(). + +func (v *Parameter) String() string { + from := v.Parent().pkgobj() + return fmt.Sprintf("parameter %s : %s", v.Name(), relType(v.Type(), from)) +} + +func (v *FreeVar) String() string { + from := v.Parent().pkgobj() + return fmt.Sprintf("freevar %s : %s", v.Name(), relType(v.Type(), from)) +} + +func (v *Builtin) String() string { + return fmt.Sprintf("builtin %s", v.Name()) +} + +// Instruction.String() + +func (v *Alloc) String() string { + op := "local" + if v.Heap { + op = "new" + } + from := v.Parent().pkgobj() + return fmt.Sprintf("%s %s (%s)", op, relType(deref(v.Type()), from), v.Comment) +} + +func (v *Phi) String() string { + var b bytes.Buffer + b.WriteString("phi [") + for i, edge := range v.Edges { + if i > 0 { + b.WriteString(", ") + } + // Be robust against malformed CFG. + block := -1 + if v.block != nil && i < len(v.block.Preds) { + block = v.block.Preds[i].Index + } + fmt.Fprintf(&b, "%d: ", block) + edgeVal := "" // be robust + if edge != nil { + edgeVal = relName(edge, v) + } + b.WriteString(edgeVal) + } + b.WriteString("]") + if v.Comment != "" { + b.WriteString(" #") + b.WriteString(v.Comment) + } + return b.String() +} + +func printCall(v *CallCommon, prefix string, instr Instruction) string { + var b bytes.Buffer + b.WriteString(prefix) + if !v.IsInvoke() { + b.WriteString(relName(v.Value, instr)) + } else { + fmt.Fprintf(&b, "invoke %s.%s", relName(v.Value, instr), v.Method.Name()) + } + b.WriteString("(") + for i, arg := range v.Args { + if i > 0 { + b.WriteString(", ") + } + b.WriteString(relName(arg, instr)) + } + if v.Signature().Variadic() { + b.WriteString("...") + } + b.WriteString(")") + return b.String() +} + +func (c *CallCommon) String() string { + return printCall(c, "", nil) +} + +func (v *Call) String() string { + return printCall(&v.Call, "", v) +} + +func (v *BinOp) String() string { + return fmt.Sprintf("%s %s %s", relName(v.X, v), v.Op.String(), relName(v.Y, v)) +} + +func (v *UnOp) String() string { + return fmt.Sprintf("%s%s%s", v.Op, relName(v.X, v), commaOk(v.CommaOk)) +} + +func printConv(prefix string, v, x Value) string { + from := v.Parent().pkgobj() + return fmt.Sprintf("%s %s <- %s (%s)", + prefix, + relType(v.Type(), from), + relType(x.Type(), from), + relName(x, v.(Instruction))) +} + +func (v *ChangeType) String() string { return printConv("changetype", v, v.X) } +func (v *Convert) String() string { return printConv("convert", v, v.X) } +func (v *ChangeInterface) String() string { return printConv("change interface", v, v.X) } +func (v *MakeInterface) String() string { return printConv("make", v, v.X) } + +func (v *MakeClosure) String() string { + var b bytes.Buffer + fmt.Fprintf(&b, "make closure %s", relName(v.Fn, v)) + if v.Bindings != nil { + b.WriteString(" [") + for i, c := range v.Bindings { + if i > 0 { + b.WriteString(", ") + } + b.WriteString(relName(c, v)) + } + b.WriteString("]") + } + return b.String() +} + +func (v *MakeSlice) String() string { + from := v.Parent().pkgobj() + return fmt.Sprintf("make %s %s %s", + relType(v.Type(), from), + relName(v.Len, v), + relName(v.Cap, v)) +} + +func (v *Slice) String() string { + var b bytes.Buffer + b.WriteString("slice ") + b.WriteString(relName(v.X, v)) + b.WriteString("[") + if v.Low != nil { + b.WriteString(relName(v.Low, v)) + } + b.WriteString(":") + if v.High != nil { + b.WriteString(relName(v.High, v)) + } + if v.Max != nil { + b.WriteString(":") + b.WriteString(relName(v.Max, v)) + } + b.WriteString("]") + return b.String() +} + +func (v *MakeMap) String() string { + res := "" + if v.Reserve != nil { + res = relName(v.Reserve, v) + } + from := v.Parent().pkgobj() + return fmt.Sprintf("make %s %s", relType(v.Type(), from), res) +} + +func (v *MakeChan) String() string { + from := v.Parent().pkgobj() + return fmt.Sprintf("make %s %s", relType(v.Type(), from), relName(v.Size, v)) +} + +func (v *FieldAddr) String() string { + st := deref(v.X.Type()).Underlying().(*types.Struct) + // Be robust against a bad index. + name := "?" + if 0 <= v.Field && v.Field < st.NumFields() { + name = st.Field(v.Field).Name() + } + return fmt.Sprintf("&%s.%s [#%d]", relName(v.X, v), name, v.Field) +} + +func (v *Field) String() string { + st := v.X.Type().Underlying().(*types.Struct) + // Be robust against a bad index. + name := "?" + if 0 <= v.Field && v.Field < st.NumFields() { + name = st.Field(v.Field).Name() + } + return fmt.Sprintf("%s.%s [#%d]", relName(v.X, v), name, v.Field) +} + +func (v *IndexAddr) String() string { + return fmt.Sprintf("&%s[%s]", relName(v.X, v), relName(v.Index, v)) +} + +func (v *Index) String() string { + return fmt.Sprintf("%s[%s]", relName(v.X, v), relName(v.Index, v)) +} + +func (v *Lookup) String() string { + return fmt.Sprintf("%s[%s]%s", relName(v.X, v), relName(v.Index, v), commaOk(v.CommaOk)) +} + +func (v *Range) String() string { + return "range " + relName(v.X, v) +} + +func (v *Next) String() string { + return "next " + relName(v.Iter, v) +} + +func (v *TypeAssert) String() string { + from := v.Parent().pkgobj() + return fmt.Sprintf("typeassert%s %s.(%s)", commaOk(v.CommaOk), relName(v.X, v), relType(v.AssertedType, from)) +} + +func (v *Extract) String() string { + return fmt.Sprintf("extract %s #%d", relName(v.Tuple, v), v.Index) +} + +func (s *Jump) String() string { + // Be robust against malformed CFG. + block := -1 + if s.block != nil && len(s.block.Succs) == 1 { + block = s.block.Succs[0].Index + } + return fmt.Sprintf("jump %d", block) +} + +func (s *If) String() string { + // Be robust against malformed CFG. + tblock, fblock := -1, -1 + if s.block != nil && len(s.block.Succs) == 2 { + tblock = s.block.Succs[0].Index + fblock = s.block.Succs[1].Index + } + return fmt.Sprintf("if %s goto %d else %d", relName(s.Cond, s), tblock, fblock) +} + +func (s *Go) String() string { + return printCall(&s.Call, "go ", s) +} + +func (s *Panic) String() string { + return "panic " + relName(s.X, s) +} + +func (s *Return) String() string { + var b bytes.Buffer + b.WriteString("return") + for i, r := range s.Results { + if i == 0 { + b.WriteString(" ") + } else { + b.WriteString(", ") + } + b.WriteString(relName(r, s)) + } + return b.String() +} + +func (*RunDefers) String() string { + return "rundefers" +} + +func (s *Send) String() string { + return fmt.Sprintf("send %s <- %s", relName(s.Chan, s), relName(s.X, s)) +} + +func (s *Defer) String() string { + return printCall(&s.Call, "defer ", s) +} + +func (s *Select) String() string { + var b bytes.Buffer + for i, st := range s.States { + if i > 0 { + b.WriteString(", ") + } + if st.Dir == types.RecvOnly { + b.WriteString("<-") + b.WriteString(relName(st.Chan, s)) + } else { + b.WriteString(relName(st.Chan, s)) + b.WriteString("<-") + b.WriteString(relName(st.Send, s)) + } + } + non := "" + if !s.Blocking { + non = "non" + } + return fmt.Sprintf("select %sblocking [%s]", non, b.String()) +} + +func (s *Store) String() string { + return fmt.Sprintf("*%s = %s", relName(s.Addr, s), relName(s.Val, s)) +} + +func (s *MapUpdate) String() string { + return fmt.Sprintf("%s[%s] = %s", relName(s.Map, s), relName(s.Key, s), relName(s.Value, s)) +} + +func (s *DebugRef) String() string { + p := s.Parent().Prog.Fset.Position(s.Pos()) + var descr interface{} + if s.object != nil { + descr = s.object // e.g. "var x int" + } else { + descr = reflect.TypeOf(s.Expr) // e.g. "*ast.CallExpr" + } + var addr string + if s.IsAddr { + addr = "address of " + } + return fmt.Sprintf("; %s%s @ %d:%d is %s", addr, descr, p.Line, p.Column, s.X.Name()) +} + +func (p *Package) String() string { + return "package " + p.Object.Path() +} + +var _ io.WriterTo = (*Package)(nil) // *Package implements io.Writer + +func (p *Package) WriteTo(w io.Writer) (int64, error) { + var buf bytes.Buffer + WritePackage(&buf, p) + n, err := w.Write(buf.Bytes()) + return int64(n), err +} + +// WritePackage writes to buf a human-readable summary of p. +func WritePackage(buf *bytes.Buffer, p *Package) { + fmt.Fprintf(buf, "%s:\n", p) + + var names []string + maxname := 0 + for name := range p.Members { + if l := len(name); l > maxname { + maxname = l + } + names = append(names, name) + } + + from := p.Object + sort.Strings(names) + for _, name := range names { + switch mem := p.Members[name].(type) { + case *NamedConst: + fmt.Fprintf(buf, " const %-*s %s = %s\n", + maxname, name, mem.Name(), mem.Value.RelString(from)) + + case *Function: + fmt.Fprintf(buf, " func %-*s %s\n", + maxname, name, relType(mem.Type(), from)) + + case *Type: + fmt.Fprintf(buf, " type %-*s %s\n", + maxname, name, relType(mem.Type().Underlying(), from)) + for _, meth := range typeutil.IntuitiveMethodSet(mem.Type(), &p.Prog.MethodSets) { + fmt.Fprintf(buf, " %s\n", types.SelectionString(meth, types.RelativeTo(from))) + } + + case *Global: + fmt.Fprintf(buf, " var %-*s %s\n", + maxname, name, relType(mem.Type().(*types.Pointer).Elem(), from)) + } + } + + fmt.Fprintf(buf, "\n") +} + +func commaOk(x bool) string { + if x { + return ",ok" + } + return "" +} diff --git a/vendor/golang.org/x/tools/go/ssa/sanity.go b/vendor/golang.org/x/tools/go/ssa/sanity.go new file mode 100644 index 0000000..b0593d0 --- /dev/null +++ b/vendor/golang.org/x/tools/go/ssa/sanity.go @@ -0,0 +1,520 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package ssa + +// An optional pass for sanity-checking invariants of the SSA representation. +// Currently it checks CFG invariants but little at the instruction level. + +import ( + "fmt" + "io" + "os" + "strings" + + "golang.org/x/tools/go/types" +) + +type sanity struct { + reporter io.Writer + fn *Function + block *BasicBlock + instrs map[Instruction]struct{} + insane bool +} + +// sanityCheck performs integrity checking of the SSA representation +// of the function fn and returns true if it was valid. Diagnostics +// are written to reporter if non-nil, os.Stderr otherwise. Some +// diagnostics are only warnings and do not imply a negative result. +// +// Sanity-checking is intended to facilitate the debugging of code +// transformation passes. +// +func sanityCheck(fn *Function, reporter io.Writer) bool { + if reporter == nil { + reporter = os.Stderr + } + return (&sanity{reporter: reporter}).checkFunction(fn) +} + +// mustSanityCheck is like sanityCheck but panics instead of returning +// a negative result. +// +func mustSanityCheck(fn *Function, reporter io.Writer) { + if !sanityCheck(fn, reporter) { + fn.WriteTo(os.Stderr) + panic("SanityCheck failed") + } +} + +func (s *sanity) diagnostic(prefix, format string, args ...interface{}) { + fmt.Fprintf(s.reporter, "%s: function %s", prefix, s.fn) + if s.block != nil { + fmt.Fprintf(s.reporter, ", block %s", s.block) + } + io.WriteString(s.reporter, ": ") + fmt.Fprintf(s.reporter, format, args...) + io.WriteString(s.reporter, "\n") +} + +func (s *sanity) errorf(format string, args ...interface{}) { + s.insane = true + s.diagnostic("Error", format, args...) +} + +func (s *sanity) warnf(format string, args ...interface{}) { + s.diagnostic("Warning", format, args...) +} + +// findDuplicate returns an arbitrary basic block that appeared more +// than once in blocks, or nil if all were unique. +func findDuplicate(blocks []*BasicBlock) *BasicBlock { + if len(blocks) < 2 { + return nil + } + if blocks[0] == blocks[1] { + return blocks[0] + } + // Slow path: + m := make(map[*BasicBlock]bool) + for _, b := range blocks { + if m[b] { + return b + } + m[b] = true + } + return nil +} + +func (s *sanity) checkInstr(idx int, instr Instruction) { + switch instr := instr.(type) { + case *If, *Jump, *Return, *Panic: + s.errorf("control flow instruction not at end of block") + case *Phi: + if idx == 0 { + // It suffices to apply this check to just the first phi node. + if dup := findDuplicate(s.block.Preds); dup != nil { + s.errorf("phi node in block with duplicate predecessor %s", dup) + } + } else { + prev := s.block.Instrs[idx-1] + if _, ok := prev.(*Phi); !ok { + s.errorf("Phi instruction follows a non-Phi: %T", prev) + } + } + if ne, np := len(instr.Edges), len(s.block.Preds); ne != np { + s.errorf("phi node has %d edges but %d predecessors", ne, np) + + } else { + for i, e := range instr.Edges { + if e == nil { + s.errorf("phi node '%s' has no value for edge #%d from %s", instr.Comment, i, s.block.Preds[i]) + } + } + } + + case *Alloc: + if !instr.Heap { + found := false + for _, l := range s.fn.Locals { + if l == instr { + found = true + break + } + } + if !found { + s.errorf("local alloc %s = %s does not appear in Function.Locals", instr.Name(), instr) + } + } + + case *BinOp: + case *Call: + case *ChangeInterface: + case *ChangeType: + case *Convert: + if _, ok := instr.X.Type().Underlying().(*types.Basic); !ok { + if _, ok := instr.Type().Underlying().(*types.Basic); !ok { + s.errorf("convert %s -> %s: at least one type must be basic", instr.X.Type(), instr.Type()) + } + } + + case *Defer: + case *Extract: + case *Field: + case *FieldAddr: + case *Go: + case *Index: + case *IndexAddr: + case *Lookup: + case *MakeChan: + case *MakeClosure: + numFree := len(instr.Fn.(*Function).FreeVars) + numBind := len(instr.Bindings) + if numFree != numBind { + s.errorf("MakeClosure has %d Bindings for function %s with %d free vars", + numBind, instr.Fn, numFree) + + } + if recv := instr.Type().(*types.Signature).Recv(); recv != nil { + s.errorf("MakeClosure's type includes receiver %s", recv.Type()) + } + + case *MakeInterface: + case *MakeMap: + case *MakeSlice: + case *MapUpdate: + case *Next: + case *Range: + case *RunDefers: + case *Select: + case *Send: + case *Slice: + case *Store: + case *TypeAssert: + case *UnOp: + case *DebugRef: + // TODO(adonovan): implement checks. + default: + panic(fmt.Sprintf("Unknown instruction type: %T", instr)) + } + + if call, ok := instr.(CallInstruction); ok { + if call.Common().Signature() == nil { + s.errorf("nil signature: %s", call) + } + } + + // Check that value-defining instructions have valid types + // and a valid referrer list. + if v, ok := instr.(Value); ok { + t := v.Type() + if t == nil { + s.errorf("no type: %s = %s", v.Name(), v) + } else if t == tRangeIter { + // not a proper type; ignore. + } else if b, ok := t.Underlying().(*types.Basic); ok && b.Info()&types.IsUntyped != 0 { + s.errorf("instruction has 'untyped' result: %s = %s : %s", v.Name(), v, t) + } + s.checkReferrerList(v) + } + + // Untyped constants are legal as instruction Operands(), + // for example: + // _ = "foo"[0] + // or: + // if wordsize==64 {...} + + // All other non-Instruction Values can be found via their + // enclosing Function or Package. +} + +func (s *sanity) checkFinalInstr(idx int, instr Instruction) { + switch instr := instr.(type) { + case *If: + if nsuccs := len(s.block.Succs); nsuccs != 2 { + s.errorf("If-terminated block has %d successors; expected 2", nsuccs) + return + } + if s.block.Succs[0] == s.block.Succs[1] { + s.errorf("If-instruction has same True, False target blocks: %s", s.block.Succs[0]) + return + } + + case *Jump: + if nsuccs := len(s.block.Succs); nsuccs != 1 { + s.errorf("Jump-terminated block has %d successors; expected 1", nsuccs) + return + } + + case *Return: + if nsuccs := len(s.block.Succs); nsuccs != 0 { + s.errorf("Return-terminated block has %d successors; expected none", nsuccs) + return + } + if na, nf := len(instr.Results), s.fn.Signature.Results().Len(); nf != na { + s.errorf("%d-ary return in %d-ary function", na, nf) + } + + case *Panic: + if nsuccs := len(s.block.Succs); nsuccs != 0 { + s.errorf("Panic-terminated block has %d successors; expected none", nsuccs) + return + } + + default: + s.errorf("non-control flow instruction at end of block") + } +} + +func (s *sanity) checkBlock(b *BasicBlock, index int) { + s.block = b + + if b.Index != index { + s.errorf("block has incorrect Index %d", b.Index) + } + if b.parent != s.fn { + s.errorf("block has incorrect parent %s", b.parent) + } + + // Check all blocks are reachable. + // (The entry block is always implicitly reachable, + // as is the Recover block, if any.) + if (index > 0 && b != b.parent.Recover) && len(b.Preds) == 0 { + s.warnf("unreachable block") + if b.Instrs == nil { + // Since this block is about to be pruned, + // tolerating transient problems in it + // simplifies other optimizations. + return + } + } + + // Check predecessor and successor relations are dual, + // and that all blocks in CFG belong to same function. + for _, a := range b.Preds { + found := false + for _, bb := range a.Succs { + if bb == b { + found = true + break + } + } + if !found { + s.errorf("expected successor edge in predecessor %s; found only: %s", a, a.Succs) + } + if a.parent != s.fn { + s.errorf("predecessor %s belongs to different function %s", a, a.parent) + } + } + for _, c := range b.Succs { + found := false + for _, bb := range c.Preds { + if bb == b { + found = true + break + } + } + if !found { + s.errorf("expected predecessor edge in successor %s; found only: %s", c, c.Preds) + } + if c.parent != s.fn { + s.errorf("successor %s belongs to different function %s", c, c.parent) + } + } + + // Check each instruction is sane. + n := len(b.Instrs) + if n == 0 { + s.errorf("basic block contains no instructions") + } + var rands [10]*Value // reuse storage + for j, instr := range b.Instrs { + if instr == nil { + s.errorf("nil instruction at index %d", j) + continue + } + if b2 := instr.Block(); b2 == nil { + s.errorf("nil Block() for instruction at index %d", j) + continue + } else if b2 != b { + s.errorf("wrong Block() (%s) for instruction at index %d ", b2, j) + continue + } + if j < n-1 { + s.checkInstr(j, instr) + } else { + s.checkFinalInstr(j, instr) + } + + // Check Instruction.Operands. + operands: + for i, op := range instr.Operands(rands[:0]) { + if op == nil { + s.errorf("nil operand pointer %d of %s", i, instr) + continue + } + val := *op + if val == nil { + continue // a nil operand is ok + } + + // Check that "untyped" types only appear on constant operands. + if _, ok := (*op).(*Const); !ok { + if basic, ok := (*op).Type().(*types.Basic); ok { + if basic.Info()&types.IsUntyped != 0 { + s.errorf("operand #%d of %s is untyped: %s", i, instr, basic) + } + } + } + + // Check that Operands that are also Instructions belong to same function. + // TODO(adonovan): also check their block dominates block b. + if val, ok := val.(Instruction); ok { + if val.Parent() != s.fn { + s.errorf("operand %d of %s is an instruction (%s) from function %s", i, instr, val, val.Parent()) + } + } + + // Check that each function-local operand of + // instr refers back to instr. (NB: quadratic) + switch val := val.(type) { + case *Const, *Global, *Builtin: + continue // not local + case *Function: + if val.parent == nil { + continue // only anon functions are local + } + } + + // TODO(adonovan): check val.Parent() != nil <=> val.Referrers() is defined. + + if refs := val.Referrers(); refs != nil { + for _, ref := range *refs { + if ref == instr { + continue operands + } + } + s.errorf("operand %d of %s (%s) does not refer to us", i, instr, val) + } else { + s.errorf("operand %d of %s (%s) has no referrers", i, instr, val) + } + } + } +} + +func (s *sanity) checkReferrerList(v Value) { + refs := v.Referrers() + if refs == nil { + s.errorf("%s has missing referrer list", v.Name()) + return + } + for i, ref := range *refs { + if _, ok := s.instrs[ref]; !ok { + s.errorf("%s.Referrers()[%d] = %s is not an instruction belonging to this function", v.Name(), i, ref) + } + } +} + +func (s *sanity) checkFunction(fn *Function) bool { + // TODO(adonovan): check Function invariants: + // - check params match signature + // - check transient fields are nil + // - warn if any fn.Locals do not appear among block instructions. + s.fn = fn + if fn.Prog == nil { + s.errorf("nil Prog") + } + + fn.String() // must not crash + fn.RelString(fn.pkgobj()) // must not crash + + // All functions have a package, except delegates (which are + // shared across packages, or duplicated as weak symbols in a + // separate-compilation model), and error.Error. + if fn.Pkg == nil { + if strings.HasPrefix(fn.Synthetic, "wrapper ") || + strings.HasPrefix(fn.Synthetic, "bound ") || + strings.HasPrefix(fn.Synthetic, "thunk ") || + strings.HasSuffix(fn.name, "Error") { + // ok + } else { + s.errorf("nil Pkg") + } + } + if src, syn := fn.Synthetic == "", fn.Syntax() != nil; src != syn { + s.errorf("got fromSource=%t, hasSyntax=%t; want same values", src, syn) + } + for i, l := range fn.Locals { + if l.Parent() != fn { + s.errorf("Local %s at index %d has wrong parent", l.Name(), i) + } + if l.Heap { + s.errorf("Local %s at index %d has Heap flag set", l.Name(), i) + } + } + // Build the set of valid referrers. + s.instrs = make(map[Instruction]struct{}) + for _, b := range fn.Blocks { + for _, instr := range b.Instrs { + s.instrs[instr] = struct{}{} + } + } + for i, p := range fn.Params { + if p.Parent() != fn { + s.errorf("Param %s at index %d has wrong parent", p.Name(), i) + } + s.checkReferrerList(p) + } + for i, fv := range fn.FreeVars { + if fv.Parent() != fn { + s.errorf("FreeVar %s at index %d has wrong parent", fv.Name(), i) + } + s.checkReferrerList(fv) + } + + if fn.Blocks != nil && len(fn.Blocks) == 0 { + // Function _had_ blocks (so it's not external) but + // they were "optimized" away, even the entry block. + s.errorf("Blocks slice is non-nil but empty") + } + for i, b := range fn.Blocks { + if b == nil { + s.warnf("nil *BasicBlock at f.Blocks[%d]", i) + continue + } + s.checkBlock(b, i) + } + if fn.Recover != nil && fn.Blocks[fn.Recover.Index] != fn.Recover { + s.errorf("Recover block is not in Blocks slice") + } + + s.block = nil + for i, anon := range fn.AnonFuncs { + if anon.Parent() != fn { + s.errorf("AnonFuncs[%d]=%s but %s.Parent()=%s", i, anon, anon, anon.Parent()) + } + } + s.fn = nil + return !s.insane +} + +// sanityCheckPackage checks invariants of packages upon creation. +// It does not require that the package is built. +// Unlike sanityCheck (for functions), it just panics at the first error. +func sanityCheckPackage(pkg *Package) { + if pkg.Object == nil { + panic(fmt.Sprintf("Package %s has no Object", pkg)) + } + pkg.String() // must not crash + + for name, mem := range pkg.Members { + if name != mem.Name() { + panic(fmt.Sprintf("%s: %T.Name() = %s, want %s", + pkg.Object.Path(), mem, mem.Name(), name)) + } + obj := mem.Object() + if obj == nil { + // This check is sound because fields + // {Global,Function}.object have type + // types.Object. (If they were declared as + // *types.{Var,Func}, we'd have a non-empty + // interface containing a nil pointer.) + + continue // not all members have typechecker objects + } + if obj.Name() != name { + if obj.Name() == "init" && strings.HasPrefix(mem.Name(), "init#") { + // Ok. The name of a declared init function varies between + // its types.Func ("init") and its ssa.Function ("init#%d"). + } else { + panic(fmt.Sprintf("%s: %T.Object().Name() = %s, want %s", + pkg.Object.Path(), mem, obj.Name(), name)) + } + } + if obj.Pos() != mem.Pos() { + panic(fmt.Sprintf("%s Pos=%d obj.Pos=%d", mem, mem.Pos(), obj.Pos())) + } + } +} diff --git a/vendor/golang.org/x/tools/go/ssa/source.go b/vendor/golang.org/x/tools/go/ssa/source.go new file mode 100644 index 0000000..84e6f1d --- /dev/null +++ b/vendor/golang.org/x/tools/go/ssa/source.go @@ -0,0 +1,294 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package ssa + +// This file defines utilities for working with source positions +// or source-level named entities ("objects"). + +// TODO(adonovan): test that {Value,Instruction}.Pos() positions match +// the originating syntax, as specified. + +import ( + "go/ast" + "go/token" + + "golang.org/x/tools/go/types" +) + +// EnclosingFunction returns the function that contains the syntax +// node denoted by path. +// +// Syntax associated with package-level variable specifications is +// enclosed by the package's init() function. +// +// Returns nil if not found; reasons might include: +// - the node is not enclosed by any function. +// - the node is within an anonymous function (FuncLit) and +// its SSA function has not been created yet +// (pkg.Build() has not yet been called). +// +func EnclosingFunction(pkg *Package, path []ast.Node) *Function { + // Start with package-level function... + fn := findEnclosingPackageLevelFunction(pkg, path) + if fn == nil { + return nil // not in any function + } + + // ...then walk down the nested anonymous functions. + n := len(path) +outer: + for i := range path { + if lit, ok := path[n-1-i].(*ast.FuncLit); ok { + for _, anon := range fn.AnonFuncs { + if anon.Pos() == lit.Type.Func { + fn = anon + continue outer + } + } + // SSA function not found: + // - package not yet built, or maybe + // - builder skipped FuncLit in dead block + // (in principle; but currently the Builder + // generates even dead FuncLits). + return nil + } + } + return fn +} + +// HasEnclosingFunction returns true if the AST node denoted by path +// is contained within the declaration of some function or +// package-level variable. +// +// Unlike EnclosingFunction, the behaviour of this function does not +// depend on whether SSA code for pkg has been built, so it can be +// used to quickly reject check inputs that will cause +// EnclosingFunction to fail, prior to SSA building. +// +func HasEnclosingFunction(pkg *Package, path []ast.Node) bool { + return findEnclosingPackageLevelFunction(pkg, path) != nil +} + +// findEnclosingPackageLevelFunction returns the Function +// corresponding to the package-level function enclosing path. +// +func findEnclosingPackageLevelFunction(pkg *Package, path []ast.Node) *Function { + if n := len(path); n >= 2 { // [... {Gen,Func}Decl File] + switch decl := path[n-2].(type) { + case *ast.GenDecl: + if decl.Tok == token.VAR && n >= 3 { + // Package-level 'var' initializer. + return pkg.init + } + + case *ast.FuncDecl: + if decl.Recv == nil && decl.Name.Name == "init" { + // Explicit init() function. + for _, b := range pkg.init.Blocks { + for _, instr := range b.Instrs { + if instr, ok := instr.(*Call); ok { + if callee, ok := instr.Call.Value.(*Function); ok && callee.Pkg == pkg && callee.Pos() == decl.Name.NamePos { + return callee + } + } + } + } + // Hack: return non-nil when SSA is not yet + // built so that HasEnclosingFunction works. + return pkg.init + } + // Declared function/method. + return findNamedFunc(pkg, decl.Name.NamePos) + } + } + return nil // not in any function +} + +// findNamedFunc returns the named function whose FuncDecl.Ident is at +// position pos. +// +func findNamedFunc(pkg *Package, pos token.Pos) *Function { + // Look at all package members and method sets of named types. + // Not very efficient. + for _, mem := range pkg.Members { + switch mem := mem.(type) { + case *Function: + if mem.Pos() == pos { + return mem + } + case *Type: + mset := pkg.Prog.MethodSets.MethodSet(types.NewPointer(mem.Type())) + for i, n := 0, mset.Len(); i < n; i++ { + // Don't call Program.Method: avoid creating wrappers. + obj := mset.At(i).Obj().(*types.Func) + if obj.Pos() == pos { + return pkg.values[obj].(*Function) + } + } + } + } + return nil +} + +// ValueForExpr returns the SSA Value that corresponds to non-constant +// expression e. +// +// It returns nil if no value was found, e.g. +// - the expression is not lexically contained within f; +// - f was not built with debug information; or +// - e is a constant expression. (For efficiency, no debug +// information is stored for constants. Use +// go/types.Info.Types[e].Value instead.) +// - e is a reference to nil or a built-in function. +// - the value was optimised away. +// +// If e is an addressable expression used in an lvalue context, +// value is the address denoted by e, and isAddr is true. +// +// The types of e (or &e, if isAddr) and the result are equal +// (modulo "untyped" bools resulting from comparisons). +// +// (Tip: to find the ssa.Value given a source position, use +// importer.PathEnclosingInterval to locate the ast.Node, then +// EnclosingFunction to locate the Function, then ValueForExpr to find +// the ssa.Value.) +// +func (f *Function) ValueForExpr(e ast.Expr) (value Value, isAddr bool) { + if f.debugInfo() { // (opt) + e = unparen(e) + for _, b := range f.Blocks { + for _, instr := range b.Instrs { + if ref, ok := instr.(*DebugRef); ok { + if ref.Expr == e { + return ref.X, ref.IsAddr + } + } + } + } + } + return +} + +// --- Lookup functions for source-level named entities (types.Objects) --- + +// Package returns the SSA Package corresponding to the specified +// type-checker package object. +// It returns nil if no such SSA package has been created. +// +func (prog *Program) Package(obj *types.Package) *Package { + return prog.packages[obj] +} + +// packageLevelValue returns the package-level value corresponding to +// the specified named object, which may be a package-level const +// (*Const), var (*Global) or func (*Function) of some package in +// prog. It returns nil if the object is not found. +// +func (prog *Program) packageLevelValue(obj types.Object) Value { + if pkg, ok := prog.packages[obj.Pkg()]; ok { + return pkg.values[obj] + } + return nil +} + +// FuncValue returns the concrete Function denoted by the source-level +// named function obj, or nil if obj denotes an interface method. +// +// TODO(adonovan): check the invariant that obj.Type() matches the +// result's Signature, both in the params/results and in the receiver. +// +func (prog *Program) FuncValue(obj *types.Func) *Function { + fn, _ := prog.packageLevelValue(obj).(*Function) + return fn +} + +// ConstValue returns the SSA Value denoted by the source-level named +// constant obj. +// +func (prog *Program) ConstValue(obj *types.Const) *Const { + // TODO(adonovan): opt: share (don't reallocate) + // Consts for const objects and constant ast.Exprs. + + // Universal constant? {true,false,nil} + if obj.Parent() == types.Universe { + return NewConst(obj.Val(), obj.Type()) + } + // Package-level named constant? + if v := prog.packageLevelValue(obj); v != nil { + return v.(*Const) + } + return NewConst(obj.Val(), obj.Type()) +} + +// VarValue returns the SSA Value that corresponds to a specific +// identifier denoting the source-level named variable obj. +// +// VarValue returns nil if a local variable was not found, perhaps +// because its package was not built, the debug information was not +// requested during SSA construction, or the value was optimized away. +// +// ref is the path to an ast.Ident (e.g. from PathEnclosingInterval), +// and that ident must resolve to obj. +// +// pkg is the package enclosing the reference. (A reference to a var +// always occurs within a function, so we need to know where to find it.) +// +// If the identifier is a field selector and its base expression is +// non-addressable, then VarValue returns the value of that field. +// For example: +// func f() struct {x int} +// f().x // VarValue(x) returns a *Field instruction of type int +// +// All other identifiers denote addressable locations (variables). +// For them, VarValue may return either the variable's address or its +// value, even when the expression is evaluated only for its value; the +// situation is reported by isAddr, the second component of the result. +// +// If !isAddr, the returned value is the one associated with the +// specific identifier. For example, +// var x int // VarValue(x) returns Const 0 here +// x = 1 // VarValue(x) returns Const 1 here +// +// It is not specified whether the value or the address is returned in +// any particular case, as it may depend upon optimizations performed +// during SSA code generation, such as registerization, constant +// folding, avoidance of materialization of subexpressions, etc. +// +func (prog *Program) VarValue(obj *types.Var, pkg *Package, ref []ast.Node) (value Value, isAddr bool) { + // All references to a var are local to some function, possibly init. + fn := EnclosingFunction(pkg, ref) + if fn == nil { + return // e.g. def of struct field; SSA not built? + } + + id := ref[0].(*ast.Ident) + + // Defining ident of a parameter? + if id.Pos() == obj.Pos() { + for _, param := range fn.Params { + if param.Object() == obj { + return param, false + } + } + } + + // Other ident? + for _, b := range fn.Blocks { + for _, instr := range b.Instrs { + if dr, ok := instr.(*DebugRef); ok { + if dr.Pos() == id.Pos() { + return dr.X, dr.IsAddr + } + } + } + } + + // Defining ident of package-level var? + if v := prog.packageLevelValue(obj); v != nil { + return v.(*Global), true + } + + return // e.g. debug info not requested, or var optimized away +} diff --git a/vendor/golang.org/x/tools/go/ssa/ssa.go b/vendor/golang.org/x/tools/go/ssa/ssa.go new file mode 100644 index 0000000..f4c64bb --- /dev/null +++ b/vendor/golang.org/x/tools/go/ssa/ssa.go @@ -0,0 +1,1700 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package ssa + +// This package defines a high-level intermediate representation for +// Go programs using static single-assignment (SSA) form. + +import ( + "fmt" + "go/ast" + "go/token" + "sync" + + "golang.org/x/tools/go/exact" + "golang.org/x/tools/go/types" + "golang.org/x/tools/go/types/typeutil" +) + +// A Program is a partial or complete Go program converted to SSA form. +type Program struct { + Fset *token.FileSet // position information for the files of this Program + imported map[string]*Package // all importable Packages, keyed by import path + packages map[*types.Package]*Package // all loaded Packages, keyed by object + mode BuilderMode // set of mode bits for SSA construction + MethodSets typeutil.MethodSetCache // cache of type-checker's method-sets + + methodsMu sync.Mutex // guards the following maps: + methodSets typeutil.Map // maps type to its concrete methodSet + runtimeTypes typeutil.Map // types for which rtypes are needed + canon typeutil.Map // type canonicalization map + bounds map[*types.Func]*Function // bounds for curried x.Method closures + thunks map[selectionKey]*Function // thunks for T.Method expressions +} + +// A Package is a single analyzed Go package containing Members for +// all package-level functions, variables, constants and types it +// declares. These may be accessed directly via Members, or via the +// type-specific accessor methods Func, Type, Var and Const. +// +// Members also contains entries for "init" (the synthetic package +// initializer) and "init#%d", the nth declared init function, +// and unspecified other things too. +// +type Package struct { + Prog *Program // the owning program + Object *types.Package // the type checker's package object for this package + Members map[string]Member // all package members keyed by name (incl. init and init#%d) + values map[types.Object]Value // package members (incl. types and methods), keyed by object + init *Function // Func("init"); the package's init function + debug bool // include full debug info in this package + + // The following fields are set transiently, then cleared + // after building. + started int32 // atomically tested and set at start of build phase + ninit int32 // number of init functions + info *types.Info // package type information + files []*ast.File // package ASTs +} + +// A Member is a member of a Go package, implemented by *NamedConst, +// *Global, *Function, or *Type; they are created by package-level +// const, var, func and type declarations respectively. +// +type Member interface { + Name() string // declared name of the package member + String() string // package-qualified name of the package member + RelString(*types.Package) string // like String, but relative refs are unqualified + Object() types.Object // typechecker's object for this member, if any + Pos() token.Pos // position of member's declaration, if known + Type() types.Type // type of the package member + Token() token.Token // token.{VAR,FUNC,CONST,TYPE} + Package() *Package // the containing package +} + +// A Type is a Member of a Package representing a package-level named type. +// +// Type() returns a *types.Named. +// +type Type struct { + object *types.TypeName + pkg *Package +} + +// A NamedConst is a Member of a Package representing a package-level +// named constant. +// +// Pos() returns the position of the declaring ast.ValueSpec.Names[*] +// identifier. +// +// NB: a NamedConst is not a Value; it contains a constant Value, which +// it augments with the name and position of its 'const' declaration. +// +type NamedConst struct { + object *types.Const + Value *Const + pos token.Pos + pkg *Package +} + +// A Value is an SSA value that can be referenced by an instruction. +type Value interface { + // Name returns the name of this value, and determines how + // this Value appears when used as an operand of an + // Instruction. + // + // This is the same as the source name for Parameters, + // Builtins, Functions, FreeVars, Globals. + // For constants, it is a representation of the constant's value + // and type. For all other Values this is the name of the + // virtual register defined by the instruction. + // + // The name of an SSA Value is not semantically significant, + // and may not even be unique within a function. + Name() string + + // If this value is an Instruction, String returns its + // disassembled form; otherwise it returns unspecified + // human-readable information about the Value, such as its + // kind, name and type. + String() string + + // Type returns the type of this value. Many instructions + // (e.g. IndexAddr) change their behaviour depending on the + // types of their operands. + Type() types.Type + + // Parent returns the function to which this Value belongs. + // It returns nil for named Functions, Builtin, Const and Global. + Parent() *Function + + // Referrers returns the list of instructions that have this + // value as one of their operands; it may contain duplicates + // if an instruction has a repeated operand. + // + // Referrers actually returns a pointer through which the + // caller may perform mutations to the object's state. + // + // Referrers is currently only defined if Parent()!=nil, + // i.e. for the function-local values FreeVar, Parameter, + // Functions (iff anonymous) and all value-defining instructions. + // It returns nil for named Functions, Builtin, Const and Global. + // + // Instruction.Operands contains the inverse of this relation. + Referrers() *[]Instruction + + // Pos returns the location of the AST token most closely + // associated with the operation that gave rise to this value, + // or token.NoPos if it was not explicit in the source. + // + // For each ast.Node type, a particular token is designated as + // the closest location for the expression, e.g. the Lparen + // for an *ast.CallExpr. This permits a compact but + // approximate mapping from Values to source positions for use + // in diagnostic messages, for example. + // + // (Do not use this position to determine which Value + // corresponds to an ast.Expr; use Function.ValueForExpr + // instead. NB: it requires that the function was built with + // debug information.) + Pos() token.Pos +} + +// An Instruction is an SSA instruction that computes a new Value or +// has some effect. +// +// An Instruction that defines a value (e.g. BinOp) also implements +// the Value interface; an Instruction that only has an effect (e.g. Store) +// does not. +// +type Instruction interface { + // String returns the disassembled form of this value. + // + // Examples of Instructions that are Values: + // "x + y" (BinOp) + // "len([])" (Call) + // Note that the name of the Value is not printed. + // + // Examples of Instructions that are not Values: + // "return x" (Return) + // "*y = x" (Store) + // + // (The separation Value.Name() from Value.String() is useful + // for some analyses which distinguish the operation from the + // value it defines, e.g., 'y = local int' is both an allocation + // of memory 'local int' and a definition of a pointer y.) + String() string + + // Parent returns the function to which this instruction + // belongs. + Parent() *Function + + // Block returns the basic block to which this instruction + // belongs. + Block() *BasicBlock + + // setBlock sets the basic block to which this instruction belongs. + setBlock(*BasicBlock) + + // Operands returns the operands of this instruction: the + // set of Values it references. + // + // Specifically, it appends their addresses to rands, a + // user-provided slice, and returns the resulting slice, + // permitting avoidance of memory allocation. + // + // The operands are appended in undefined order, but the order + // is consistent for a given Instruction; the addresses are + // always non-nil but may point to a nil Value. Clients may + // store through the pointers, e.g. to effect a value + // renaming. + // + // Value.Referrers is a subset of the inverse of this + // relation. (Referrers are not tracked for all types of + // Values.) + Operands(rands []*Value) []*Value + + // Pos returns the location of the AST token most closely + // associated with the operation that gave rise to this + // instruction, or token.NoPos if it was not explicit in the + // source. + // + // For each ast.Node type, a particular token is designated as + // the closest location for the expression, e.g. the Go token + // for an *ast.GoStmt. This permits a compact but approximate + // mapping from Instructions to source positions for use in + // diagnostic messages, for example. + // + // (Do not use this position to determine which Instruction + // corresponds to an ast.Expr; see the notes for Value.Pos. + // This position may be used to determine which non-Value + // Instruction corresponds to some ast.Stmts, but not all: If + // and Jump instructions have no Pos(), for example.) + Pos() token.Pos +} + +// A Node is a node in the SSA value graph. Every concrete type that +// implements Node is also either a Value, an Instruction, or both. +// +// Node contains the methods common to Value and Instruction, plus the +// Operands and Referrers methods generalized to return nil for +// non-Instructions and non-Values, respectively. +// +// Node is provided to simplify SSA graph algorithms. Clients should +// use the more specific and informative Value or Instruction +// interfaces where appropriate. +// +type Node interface { + // Common methods: + String() string + Pos() token.Pos + Parent() *Function + + // Partial methods: + Operands(rands []*Value) []*Value // nil for non-Instructions + Referrers() *[]Instruction // nil for non-Values +} + +// Function represents the parameters, results, and code of a function +// or method. +// +// If Blocks is nil, this indicates an external function for which no +// Go source code is available. In this case, FreeVars and Locals +// are nil too. Clients performing whole-program analysis must +// handle external functions specially. +// +// Blocks contains the function's control-flow graph (CFG). +// Blocks[0] is the function entry point; block order is not otherwise +// semantically significant, though it may affect the readability of +// the disassembly. +// To iterate over the blocks in dominance order, use DomPreorder(). +// +// Recover is an optional second entry point to which control resumes +// after a recovered panic. The Recover block may contain only a return +// statement, preceded by a load of the function's named return +// parameters, if any. +// +// A nested function (Parent()!=nil) that refers to one or more +// lexically enclosing local variables ("free variables") has FreeVars. +// Such functions cannot be called directly but require a +// value created by MakeClosure which, via its Bindings, supplies +// values for these parameters. +// +// If the function is a method (Signature.Recv() != nil) then the first +// element of Params is the receiver parameter. +// +// A Go package may declare many functions called "init". +// For each one, Object().Name() returns "init" but Name() returns +// "init#1", etc, in declaration order. +// +// Pos() returns the declaring ast.FuncLit.Type.Func or the position +// of the ast.FuncDecl.Name, if the function was explicit in the +// source. Synthetic wrappers, for which Synthetic != "", may share +// the same position as the function they wrap. +// Syntax.Pos() always returns the position of the declaring "func" token. +// +// Type() returns the function's Signature. +// +type Function struct { + name string + object types.Object // a declared *types.Func or one of its wrappers + method *types.Selection // info about provenance of synthetic methods + Signature *types.Signature + pos token.Pos + + Synthetic string // provenance of synthetic function; "" for true source functions + syntax ast.Node // *ast.Func{Decl,Lit}; replaced with simple ast.Node after build, unless debug mode + parent *Function // enclosing function if anon; nil if global + Pkg *Package // enclosing package; nil for shared funcs (wrappers and error.Error) + Prog *Program // enclosing program + Params []*Parameter // function parameters; for methods, includes receiver + FreeVars []*FreeVar // free variables whose values must be supplied by closure + Locals []*Alloc // local variables of this function + Blocks []*BasicBlock // basic blocks of the function; nil => external + Recover *BasicBlock // optional; control transfers here after recovered panic + AnonFuncs []*Function // anonymous functions directly beneath this one + referrers []Instruction // referring instructions (iff Parent() != nil) + + // The following fields are set transiently during building, + // then cleared. + currentBlock *BasicBlock // where to emit code + objects map[types.Object]Value // addresses of local variables + namedResults []*Alloc // tuple of named results + targets *targets // linked stack of branch targets + lblocks map[*ast.Object]*lblock // labelled blocks +} + +// BasicBlock represents an SSA basic block. +// +// The final element of Instrs is always an explicit transfer of +// control (If, Jump, Return, or Panic). +// +// A block may contain no Instructions only if it is unreachable, +// i.e., Preds is nil. Empty blocks are typically pruned. +// +// BasicBlocks and their Preds/Succs relation form a (possibly cyclic) +// graph independent of the SSA Value graph: the control-flow graph or +// CFG. It is illegal for multiple edges to exist between the same +// pair of blocks. +// +// Each BasicBlock is also a node in the dominator tree of the CFG. +// The tree may be navigated using Idom()/Dominees() and queried using +// Dominates(). +// +// The order of Preds and Succs is significant (to Phi and If +// instructions, respectively). +// +type BasicBlock struct { + Index int // index of this block within Parent().Blocks + Comment string // optional label; no semantic significance + parent *Function // parent function + Instrs []Instruction // instructions in order + Preds, Succs []*BasicBlock // predecessors and successors + succs2 [2]*BasicBlock // initial space for Succs + dom domInfo // dominator tree info + gaps int // number of nil Instrs (transient) + rundefers int // number of rundefers (transient) +} + +// Pure values ---------------------------------------- + +// A FreeVar represents a free variable of the function to which it +// belongs. +// +// FreeVars are used to implement anonymous functions, whose free +// variables are lexically captured in a closure formed by +// MakeClosure. The value of such a free var is an Alloc or another +// FreeVar and is considered a potentially escaping heap address, with +// pointer type. +// +// FreeVars are also used to implement bound method closures. Such a +// free var represents the receiver value and may be of any type that +// has concrete methods. +// +// Pos() returns the position of the value that was captured, which +// belongs to an enclosing function. +// +type FreeVar struct { + name string + typ types.Type + pos token.Pos + parent *Function + referrers []Instruction + + // Transiently needed during building. + outer Value // the Value captured from the enclosing context. +} + +// A Parameter represents an input parameter of a function. +// +type Parameter struct { + name string + object types.Object // a *types.Var; nil for non-source locals + typ types.Type + pos token.Pos + parent *Function + referrers []Instruction +} + +// A Const represents the value of a constant expression. +// +// The underlying type of a constant may be any boolean, numeric, or +// string type. In addition, a Const may represent the nil value of +// any reference type---interface, map, channel, pointer, slice, or +// function---but not "untyped nil". +// +// All source-level constant expressions are represented by a Const +// of the same type and value. +// +// Value holds the exact value of the constant, independent of its +// Type(), using the same representation as package go/exact uses for +// constants, or nil for a typed nil value. +// +// Pos() returns token.NoPos. +// +// Example printed form: +// 42:int +// "hello":untyped string +// 3+4i:MyComplex +// +type Const struct { + typ types.Type + Value exact.Value +} + +// A Global is a named Value holding the address of a package-level +// variable. +// +// Pos() returns the position of the ast.ValueSpec.Names[*] +// identifier. +// +type Global struct { + name string + object types.Object // a *types.Var; may be nil for synthetics e.g. init$guard + typ types.Type + pos token.Pos + + Pkg *Package +} + +// A Builtin represents a specific use of a built-in function, e.g. len. +// +// Builtins are immutable values. Builtins do not have addresses. +// Builtins can only appear in CallCommon.Func. +// +// Name() indicates the function: one of the built-in functions from the +// Go spec (excluding "make" and "new") or one of these ssa-defined +// intrinsics: +// +// // wrapnilchk returns ptr if non-nil, panics otherwise. +// // (For use in indirection wrappers.) +// func ssa:wrapnilchk(ptr *T, recvType, methodName string) *T +// +// Object() returns a *types.Builtin for built-ins defined by the spec, +// nil for others. +// +// Type() returns a *types.Signature representing the effective +// signature of the built-in for this call. +// +type Builtin struct { + name string + sig *types.Signature +} + +// Value-defining instructions ---------------------------------------- + +// The Alloc instruction reserves space for a variable of the given type, +// zero-initializes it, and yields its address. +// +// Alloc values are always addresses, and have pointer types, so the +// type of the allocated variable is actually +// Type().Underlying().(*types.Pointer).Elem(). +// +// If Heap is false, Alloc allocates space in the function's +// activation record (frame); we refer to an Alloc(Heap=false) as a +// "local" alloc. Each local Alloc returns the same address each time +// it is executed within the same activation; the space is +// re-initialized to zero. +// +// If Heap is true, Alloc allocates space in the heap; we +// refer to an Alloc(Heap=true) as a "new" alloc. Each new Alloc +// returns a different address each time it is executed. +// +// When Alloc is applied to a channel, map or slice type, it returns +// the address of an uninitialized (nil) reference of that kind; store +// the result of MakeSlice, MakeMap or MakeChan in that location to +// instantiate these types. +// +// Pos() returns the ast.CompositeLit.Lbrace for a composite literal, +// or the ast.CallExpr.Rparen for a call to new() or for a call that +// allocates a varargs slice. +// +// Example printed form: +// t0 = local int +// t1 = new int +// +type Alloc struct { + register + Comment string + Heap bool + index int // dense numbering; for lifting +} + +// The Phi instruction represents an SSA φ-node, which combines values +// that differ across incoming control-flow edges and yields a new +// value. Within a block, all φ-nodes must appear before all non-φ +// nodes. +// +// Pos() returns the position of the && or || for short-circuit +// control-flow joins, or that of the *Alloc for φ-nodes inserted +// during SSA renaming. +// +// Example printed form: +// t2 = phi [0: t0, 1: t1] +// +type Phi struct { + register + Comment string // a hint as to its purpose + Edges []Value // Edges[i] is value for Block().Preds[i] +} + +// The Call instruction represents a function or method call. +// +// The Call instruction yields the function result if there is exactly +// one. Otherwise it returns a tuple, the components of which are +// accessed via Extract. +// +// See CallCommon for generic function call documentation. +// +// Pos() returns the ast.CallExpr.Lparen, if explicit in the source. +// +// Example printed form: +// t2 = println(t0, t1) +// t4 = t3() +// t7 = invoke t5.Println(...t6) +// +type Call struct { + register + Call CallCommon +} + +// The BinOp instruction yields the result of binary operation X Op Y. +// +// Pos() returns the ast.BinaryExpr.OpPos, if explicit in the source. +// +// Example printed form: +// t1 = t0 + 1:int +// +type BinOp struct { + register + // One of: + // ADD SUB MUL QUO REM + - * / % + // AND OR XOR SHL SHR AND_NOT & | ^ << >> &~ + // EQL LSS GTR NEQ LEQ GEQ == != < <= < >= + Op token.Token + X, Y Value +} + +// The UnOp instruction yields the result of Op X. +// ARROW is channel receive. +// MUL is pointer indirection (load). +// XOR is bitwise complement. +// SUB is negation. +// NOT is logical negation. +// +// If CommaOk and Op=ARROW, the result is a 2-tuple of the value above +// and a boolean indicating the success of the receive. The +// components of the tuple are accessed using Extract. +// +// Pos() returns the ast.UnaryExpr.OpPos, if explicit in the source. +// For receive operations (ARROW) implicit in ranging over a channel, +// Pos() returns the ast.RangeStmt.For. +// For implicit memory loads (STAR), Pos() returns the position of the +// most closely associated source-level construct; the details are not +// specified. +// +// Example printed form: +// t0 = *x +// t2 = <-t1,ok +// +type UnOp struct { + register + Op token.Token // One of: NOT SUB ARROW MUL XOR ! - <- * ^ + X Value + CommaOk bool +} + +// The ChangeType instruction applies to X a value-preserving type +// change to Type(). +// +// Type changes are permitted: +// - between a named type and its underlying type. +// - between two named types of the same underlying type. +// - between (possibly named) pointers to identical base types. +// - from a bidirectional channel to a read- or write-channel, +// optionally adding/removing a name. +// +// This operation cannot fail dynamically. +// +// Pos() returns the ast.CallExpr.Lparen, if the instruction arose +// from an explicit conversion in the source. +// +// Example printed form: +// t1 = changetype *int <- IntPtr (t0) +// +type ChangeType struct { + register + X Value +} + +// The Convert instruction yields the conversion of value X to type +// Type(). One or both of those types is basic (but possibly named). +// +// A conversion may change the value and representation of its operand. +// Conversions are permitted: +// - between real numeric types. +// - between complex numeric types. +// - between string and []byte or []rune. +// - between pointers and unsafe.Pointer. +// - between unsafe.Pointer and uintptr. +// - from (Unicode) integer to (UTF-8) string. +// A conversion may imply a type name change also. +// +// This operation cannot fail dynamically. +// +// Conversions of untyped string/number/bool constants to a specific +// representation are eliminated during SSA construction. +// +// Pos() returns the ast.CallExpr.Lparen, if the instruction arose +// from an explicit conversion in the source. +// +// Example printed form: +// t1 = convert []byte <- string (t0) +// +type Convert struct { + register + X Value +} + +// ChangeInterface constructs a value of one interface type from a +// value of another interface type known to be assignable to it. +// This operation cannot fail. +// +// Pos() returns the ast.CallExpr.Lparen if the instruction arose from +// an explicit T(e) conversion; the ast.TypeAssertExpr.Lparen if the +// instruction arose from an explicit e.(T) operation; or token.NoPos +// otherwise. +// +// Example printed form: +// t1 = change interface interface{} <- I (t0) +// +type ChangeInterface struct { + register + X Value +} + +// MakeInterface constructs an instance of an interface type from a +// value of a concrete type. +// +// Use Program.MethodSets.MethodSet(X.Type()) to find the method-set +// of X, and Program.Method(m) to find the implementation of a method. +// +// To construct the zero value of an interface type T, use: +// NewConst(exact.MakeNil(), T, pos) +// +// Pos() returns the ast.CallExpr.Lparen, if the instruction arose +// from an explicit conversion in the source. +// +// Example printed form: +// t1 = make interface{} <- int (42:int) +// t2 = make Stringer <- t0 +// +type MakeInterface struct { + register + X Value +} + +// The MakeClosure instruction yields a closure value whose code is +// Fn and whose free variables' values are supplied by Bindings. +// +// Type() returns a (possibly named) *types.Signature. +// +// Pos() returns the ast.FuncLit.Type.Func for a function literal +// closure or the ast.SelectorExpr.Sel for a bound method closure. +// +// Example printed form: +// t0 = make closure anon@1.2 [x y z] +// t1 = make closure bound$(main.I).add [i] +// +type MakeClosure struct { + register + Fn Value // always a *Function + Bindings []Value // values for each free variable in Fn.FreeVars +} + +// The MakeMap instruction creates a new hash-table-based map object +// and yields a value of kind map. +// +// Type() returns a (possibly named) *types.Map. +// +// Pos() returns the ast.CallExpr.Lparen, if created by make(map), or +// the ast.CompositeLit.Lbrack if created by a literal. +// +// Example printed form: +// t1 = make map[string]int t0 +// t1 = make StringIntMap t0 +// +type MakeMap struct { + register + Reserve Value // initial space reservation; nil => default +} + +// The MakeChan instruction creates a new channel object and yields a +// value of kind chan. +// +// Type() returns a (possibly named) *types.Chan. +// +// Pos() returns the ast.CallExpr.Lparen for the make(chan) that +// created it. +// +// Example printed form: +// t0 = make chan int 0 +// t0 = make IntChan 0 +// +type MakeChan struct { + register + Size Value // int; size of buffer; zero => synchronous. +} + +// The MakeSlice instruction yields a slice of length Len backed by a +// newly allocated array of length Cap. +// +// Both Len and Cap must be non-nil Values of integer type. +// +// (Alloc(types.Array) followed by Slice will not suffice because +// Alloc can only create arrays of constant length.) +// +// Type() returns a (possibly named) *types.Slice. +// +// Pos() returns the ast.CallExpr.Lparen for the make([]T) that +// created it. +// +// Example printed form: +// t1 = make []string 1:int t0 +// t1 = make StringSlice 1:int t0 +// +type MakeSlice struct { + register + Len Value + Cap Value +} + +// The Slice instruction yields a slice of an existing string, slice +// or *array X between optional integer bounds Low and High. +// +// Dynamically, this instruction panics if X evaluates to a nil *array +// pointer. +// +// Type() returns string if the type of X was string, otherwise a +// *types.Slice with the same element type as X. +// +// Pos() returns the ast.SliceExpr.Lbrack if created by a x[:] slice +// operation, the ast.CompositeLit.Lbrace if created by a literal, or +// NoPos if not explicit in the source (e.g. a variadic argument slice). +// +// Example printed form: +// t1 = slice t0[1:] +// +type Slice struct { + register + X Value // slice, string, or *array + Low, High, Max Value // each may be nil +} + +// The FieldAddr instruction yields the address of Field of *struct X. +// +// The field is identified by its index within the field list of the +// struct type of X. +// +// Dynamically, this instruction panics if X evaluates to a nil +// pointer. +// +// Type() returns a (possibly named) *types.Pointer. +// +// Pos() returns the position of the ast.SelectorExpr.Sel for the +// field, if explicit in the source. +// +// Example printed form: +// t1 = &t0.name [#1] +// +type FieldAddr struct { + register + X Value // *struct + Field int // index into X.Type().Deref().(*types.Struct).Fields +} + +// The Field instruction yields the Field of struct X. +// +// The field is identified by its index within the field list of the +// struct type of X; by using numeric indices we avoid ambiguity of +// package-local identifiers and permit compact representations. +// +// Pos() returns the position of the ast.SelectorExpr.Sel for the +// field, if explicit in the source. +// +// Example printed form: +// t1 = t0.name [#1] +// +type Field struct { + register + X Value // struct + Field int // index into X.Type().(*types.Struct).Fields +} + +// The IndexAddr instruction yields the address of the element at +// index Index of collection X. Index is an integer expression. +// +// The elements of maps and strings are not addressable; use Lookup or +// MapUpdate instead. +// +// Dynamically, this instruction panics if X evaluates to a nil *array +// pointer. +// +// Type() returns a (possibly named) *types.Pointer. +// +// Pos() returns the ast.IndexExpr.Lbrack for the index operation, if +// explicit in the source. +// +// Example printed form: +// t2 = &t0[t1] +// +type IndexAddr struct { + register + X Value // slice or *array, + Index Value // numeric index +} + +// The Index instruction yields element Index of array X. +// +// Pos() returns the ast.IndexExpr.Lbrack for the index operation, if +// explicit in the source. +// +// Example printed form: +// t2 = t0[t1] +// +type Index struct { + register + X Value // array + Index Value // integer index +} + +// The Lookup instruction yields element Index of collection X, a map +// or string. Index is an integer expression if X is a string or the +// appropriate key type if X is a map. +// +// If CommaOk, the result is a 2-tuple of the value above and a +// boolean indicating the result of a map membership test for the key. +// The components of the tuple are accessed using Extract. +// +// Pos() returns the ast.IndexExpr.Lbrack, if explicit in the source. +// +// Example printed form: +// t2 = t0[t1] +// t5 = t3[t4],ok +// +type Lookup struct { + register + X Value // string or map + Index Value // numeric or key-typed index + CommaOk bool // return a value,ok pair +} + +// SelectState is a helper for Select. +// It represents one goal state and its corresponding communication. +// +type SelectState struct { + Dir types.ChanDir // direction of case (SendOnly or RecvOnly) + Chan Value // channel to use (for send or receive) + Send Value // value to send (for send) + Pos token.Pos // position of token.ARROW + DebugNode ast.Node // ast.SendStmt or ast.UnaryExpr(<-) [debug mode] +} + +// The Select instruction tests whether (or blocks until) one +// of the specified sent or received states is entered. +// +// Let n be the number of States for which Dir==RECV and T_i (0<=i string iterator; false => map iterator. +} + +// The TypeAssert instruction tests whether interface value X has type +// AssertedType. +// +// If !CommaOk, on success it returns v, the result of the conversion +// (defined below); on failure it panics. +// +// If CommaOk: on success it returns a pair (v, true) where v is the +// result of the conversion; on failure it returns (z, false) where z +// is AssertedType's zero value. The components of the pair must be +// accessed using the Extract instruction. +// +// If AssertedType is a concrete type, TypeAssert checks whether the +// dynamic type in interface X is equal to it, and if so, the result +// of the conversion is a copy of the value in the interface. +// +// If AssertedType is an interface, TypeAssert checks whether the +// dynamic type of the interface is assignable to it, and if so, the +// result of the conversion is a copy of the interface value X. +// If AssertedType is a superinterface of X.Type(), the operation will +// fail iff the operand is nil. (Contrast with ChangeInterface, which +// performs no nil-check.) +// +// Type() reflects the actual type of the result, possibly a +// 2-types.Tuple; AssertedType is the asserted type. +// +// Pos() returns the ast.CallExpr.Lparen if the instruction arose from +// an explicit T(e) conversion; the ast.TypeAssertExpr.Lparen if the +// instruction arose from an explicit e.(T) operation; or the +// ast.CaseClause.Case if the instruction arose from a case of a +// type-switch statement. +// +// Example printed form: +// t1 = typeassert t0.(int) +// t3 = typeassert,ok t2.(T) +// +type TypeAssert struct { + register + X Value + AssertedType types.Type + CommaOk bool +} + +// The Extract instruction yields component Index of Tuple. +// +// This is used to access the results of instructions with multiple +// return values, such as Call, TypeAssert, Next, UnOp(ARROW) and +// IndexExpr(Map). +// +// Example printed form: +// t1 = extract t0 #1 +// +type Extract struct { + register + Tuple Value + Index int +} + +// Instructions executed for effect. They do not yield a value. -------------------- + +// The Jump instruction transfers control to the sole successor of its +// owning block. +// +// A Jump must be the last instruction of its containing BasicBlock. +// +// Pos() returns NoPos. +// +// Example printed form: +// jump done +// +type Jump struct { + anInstruction +} + +// The If instruction transfers control to one of the two successors +// of its owning block, depending on the boolean Cond: the first if +// true, the second if false. +// +// An If instruction must be the last instruction of its containing +// BasicBlock. +// +// Pos() returns NoPos. +// +// Example printed form: +// if t0 goto done else body +// +type If struct { + anInstruction + Cond Value +} + +// The Return instruction returns values and control back to the calling +// function. +// +// len(Results) is always equal to the number of results in the +// function's signature. +// +// If len(Results) > 1, Return returns a tuple value with the specified +// components which the caller must access using Extract instructions. +// +// There is no instruction to return a ready-made tuple like those +// returned by a "value,ok"-mode TypeAssert, Lookup or UnOp(ARROW) or +// a tail-call to a function with multiple result parameters. +// +// Return must be the last instruction of its containing BasicBlock. +// Such a block has no successors. +// +// Pos() returns the ast.ReturnStmt.Return, if explicit in the source. +// +// Example printed form: +// return +// return nil:I, 2:int +// +type Return struct { + anInstruction + Results []Value + pos token.Pos +} + +// The RunDefers instruction pops and invokes the entire stack of +// procedure calls pushed by Defer instructions in this function. +// +// It is legal to encounter multiple 'rundefers' instructions in a +// single control-flow path through a function; this is useful in +// the combined init() function, for example. +// +// Pos() returns NoPos. +// +// Example printed form: +// rundefers +// +type RunDefers struct { + anInstruction +} + +// The Panic instruction initiates a panic with value X. +// +// A Panic instruction must be the last instruction of its containing +// BasicBlock, which must have no successors. +// +// NB: 'go panic(x)' and 'defer panic(x)' do not use this instruction; +// they are treated as calls to a built-in function. +// +// Pos() returns the ast.CallExpr.Lparen if this panic was explicit +// in the source. +// +// Example printed form: +// panic t0 +// +type Panic struct { + anInstruction + X Value // an interface{} + pos token.Pos +} + +// The Go instruction creates a new goroutine and calls the specified +// function within it. +// +// See CallCommon for generic function call documentation. +// +// Pos() returns the ast.GoStmt.Go. +// +// Example printed form: +// go println(t0, t1) +// go t3() +// go invoke t5.Println(...t6) +// +type Go struct { + anInstruction + Call CallCommon + pos token.Pos +} + +// The Defer instruction pushes the specified call onto a stack of +// functions to be called by a RunDefers instruction or by a panic. +// +// See CallCommon for generic function call documentation. +// +// Pos() returns the ast.DeferStmt.Defer. +// +// Example printed form: +// defer println(t0, t1) +// defer t3() +// defer invoke t5.Println(...t6) +// +type Defer struct { + anInstruction + Call CallCommon + pos token.Pos +} + +// The Send instruction sends X on channel Chan. +// +// Pos() returns the ast.SendStmt.Arrow, if explicit in the source. +// +// Example printed form: +// send t0 <- t1 +// +type Send struct { + anInstruction + Chan, X Value + pos token.Pos +} + +// The Store instruction stores Val at address Addr. +// Stores can be of arbitrary types. +// +// Pos() returns the position of the source-level construct most closely +// associated with the memory store operation. +// Since implicit memory stores are numerous and varied and depend upon +// implementation choices, the details are not specified. +// +// Example printed form: +// *x = y +// +type Store struct { + anInstruction + Addr Value + Val Value + pos token.Pos +} + +// The MapUpdate instruction updates the association of Map[Key] to +// Value. +// +// Pos() returns the ast.KeyValueExpr.Colon or ast.IndexExpr.Lbrack, +// if explicit in the source. +// +// Example printed form: +// t0[t1] = t2 +// +type MapUpdate struct { + anInstruction + Map Value + Key Value + Value Value + pos token.Pos +} + +// A DebugRef instruction maps a source-level expression Expr to the +// SSA value X that represents the value (!IsAddr) or address (IsAddr) +// of that expression. +// +// DebugRef is a pseudo-instruction: it has no dynamic effect. +// +// Pos() returns Expr.Pos(), the start position of the source-level +// expression. This is not the same as the "designated" token as +// documented at Value.Pos(). e.g. CallExpr.Pos() does not return the +// position of the ("designated") Lparen token. +// +// If Expr is an *ast.Ident denoting a var or func, Object() returns +// the object; though this information can be obtained from the type +// checker, including it here greatly facilitates debugging. +// For non-Ident expressions, Object() returns nil. +// +// DebugRefs are generated only for functions built with debugging +// enabled; see Package.SetDebugMode() and the GlobalDebug builder +// mode flag. +// +// DebugRefs are not emitted for ast.Idents referring to constants or +// predeclared identifiers, since they are trivial and numerous. +// Nor are they emitted for ast.ParenExprs. +// +// (By representing these as instructions, rather than out-of-band, +// consistency is maintained during transformation passes by the +// ordinary SSA renaming machinery.) +// +// Example printed form: +// ; *ast.CallExpr @ 102:9 is t5 +// ; var x float64 @ 109:72 is x +// ; address of *ast.CompositeLit @ 216:10 is t0 +// +type DebugRef struct { + anInstruction + Expr ast.Expr // the referring expression (never *ast.ParenExpr) + object types.Object // the identity of the source var/func + IsAddr bool // Expr is addressable and X is the address it denotes + X Value // the value or address of Expr +} + +// Embeddable mix-ins and helpers for common parts of other structs. ----------- + +// register is a mix-in embedded by all SSA values that are also +// instructions, i.e. virtual registers, and provides a uniform +// implementation of most of the Value interface: Value.Name() is a +// numbered register (e.g. "t0"); the other methods are field accessors. +// +// Temporary names are automatically assigned to each register on +// completion of building a function in SSA form. +// +// Clients must not assume that the 'id' value (and the Name() derived +// from it) is unique within a function. As always in this API, +// semantics are determined only by identity; names exist only to +// facilitate debugging. +// +type register struct { + anInstruction + num int // "name" of virtual register, e.g. "t0". Not guaranteed unique. + typ types.Type // type of virtual register + pos token.Pos // position of source expression, or NoPos + referrers []Instruction +} + +// anInstruction is a mix-in embedded by all Instructions. +// It provides the implementations of the Block and setBlock methods. +type anInstruction struct { + block *BasicBlock // the basic block of this instruction +} + +// CallCommon is contained by Go, Defer and Call to hold the +// common parts of a function or method call. +// +// Each CallCommon exists in one of two modes, function call and +// interface method invocation, or "call" and "invoke" for short. +// +// 1. "call" mode: when Method is nil (!IsInvoke), a CallCommon +// represents an ordinary function call of the value in Value, +// which may be a *Builtin, a *Function or any other value of kind +// 'func'. +// +// Value may be one of: +// (a) a *Function, indicating a statically dispatched call +// to a package-level function, an anonymous function, or +// a method of a named type. +// (b) a *MakeClosure, indicating an immediately applied +// function literal with free variables. +// (c) a *Builtin, indicating a statically dispatched call +// to a built-in function. +// (d) any other value, indicating a dynamically dispatched +// function call. +// StaticCallee returns the identity of the callee in cases +// (a) and (b), nil otherwise. +// +// Args contains the arguments to the call. If Value is a method, +// Args[0] contains the receiver parameter. +// +// Example printed form: +// t2 = println(t0, t1) +// go t3() +// defer t5(...t6) +// +// 2. "invoke" mode: when Method is non-nil (IsInvoke), a CallCommon +// represents a dynamically dispatched call to an interface method. +// In this mode, Value is the interface value and Method is the +// interface's abstract method. Note: an abstract method may be +// shared by multiple interfaces due to embedding; Value.Type() +// provides the specific interface used for this call. +// +// Value is implicitly supplied to the concrete method implementation +// as the receiver parameter; in other words, Args[0] holds not the +// receiver but the first true argument. +// +// Example printed form: +// t1 = invoke t0.String() +// go invoke t3.Run(t2) +// defer invoke t4.Handle(...t5) +// +// For all calls to variadic functions (Signature().Variadic()), +// the last element of Args is a slice. +// +type CallCommon struct { + Value Value // receiver (invoke mode) or func value (call mode) + Method *types.Func // abstract method (invoke mode) + Args []Value // actual parameters (in static method call, includes receiver) + pos token.Pos // position of CallExpr.Lparen, iff explicit in source +} + +// IsInvoke returns true if this call has "invoke" (not "call") mode. +func (c *CallCommon) IsInvoke() bool { + return c.Method != nil +} + +func (c *CallCommon) Pos() token.Pos { return c.pos } + +// Signature returns the signature of the called function. +// +// For an "invoke"-mode call, the signature of the interface method is +// returned. +// +// In either "call" or "invoke" mode, if the callee is a method, its +// receiver is represented by sig.Recv, not sig.Params().At(0). +// +func (c *CallCommon) Signature() *types.Signature { + if c.Method != nil { + return c.Method.Type().(*types.Signature) + } + return c.Value.Type().Underlying().(*types.Signature) +} + +// StaticCallee returns the callee if this is a trivially static +// "call"-mode call to a function. +func (c *CallCommon) StaticCallee() *Function { + switch fn := c.Value.(type) { + case *Function: + return fn + case *MakeClosure: + return fn.Fn.(*Function) + } + return nil +} + +// Description returns a description of the mode of this call suitable +// for a user interface, e.g., "static method call". +func (c *CallCommon) Description() string { + switch fn := c.Value.(type) { + case *Builtin: + return "built-in function call" + case *MakeClosure: + return "static function closure call" + case *Function: + if fn.Signature.Recv() != nil { + return "static method call" + } + return "static function call" + } + if c.IsInvoke() { + return "dynamic method call" // ("invoke" mode) + } + return "dynamic function call" +} + +// The CallInstruction interface, implemented by *Go, *Defer and *Call, +// exposes the common parts of function-calling instructions, +// yet provides a way back to the Value defined by *Call alone. +// +type CallInstruction interface { + Instruction + Common() *CallCommon // returns the common parts of the call + Value() *Call // returns the result value of the call (*Call) or nil (*Go, *Defer) +} + +func (s *Call) Common() *CallCommon { return &s.Call } +func (s *Defer) Common() *CallCommon { return &s.Call } +func (s *Go) Common() *CallCommon { return &s.Call } + +func (s *Call) Value() *Call { return s } +func (s *Defer) Value() *Call { return nil } +func (s *Go) Value() *Call { return nil } + +func (v *Builtin) Type() types.Type { return v.sig } +func (v *Builtin) Name() string { return v.name } +func (*Builtin) Referrers() *[]Instruction { return nil } +func (v *Builtin) Pos() token.Pos { return token.NoPos } +func (v *Builtin) Object() types.Object { return types.Universe.Lookup(v.name) } +func (v *Builtin) Parent() *Function { return nil } + +func (v *FreeVar) Type() types.Type { return v.typ } +func (v *FreeVar) Name() string { return v.name } +func (v *FreeVar) Referrers() *[]Instruction { return &v.referrers } +func (v *FreeVar) Pos() token.Pos { return v.pos } +func (v *FreeVar) Parent() *Function { return v.parent } + +func (v *Global) Type() types.Type { return v.typ } +func (v *Global) Name() string { return v.name } +func (v *Global) Parent() *Function { return nil } +func (v *Global) Pos() token.Pos { return v.pos } +func (v *Global) Referrers() *[]Instruction { return nil } +func (v *Global) Token() token.Token { return token.VAR } +func (v *Global) Object() types.Object { return v.object } +func (v *Global) String() string { return v.RelString(nil) } +func (v *Global) Package() *Package { return v.Pkg } +func (v *Global) RelString(from *types.Package) string { return relString(v, from) } + +func (v *Function) Name() string { return v.name } +func (v *Function) Type() types.Type { return v.Signature } +func (v *Function) Pos() token.Pos { return v.pos } +func (v *Function) Token() token.Token { return token.FUNC } +func (v *Function) Object() types.Object { return v.object } +func (v *Function) String() string { return v.RelString(nil) } +func (v *Function) Package() *Package { return v.Pkg } +func (v *Function) Parent() *Function { return v.parent } +func (v *Function) Referrers() *[]Instruction { + if v.parent != nil { + return &v.referrers + } + return nil +} + +func (v *Parameter) Type() types.Type { return v.typ } +func (v *Parameter) Name() string { return v.name } +func (v *Parameter) Object() types.Object { return v.object } +func (v *Parameter) Referrers() *[]Instruction { return &v.referrers } +func (v *Parameter) Pos() token.Pos { return v.pos } +func (v *Parameter) Parent() *Function { return v.parent } + +func (v *Alloc) Type() types.Type { return v.typ } +func (v *Alloc) Referrers() *[]Instruction { return &v.referrers } +func (v *Alloc) Pos() token.Pos { return v.pos } + +func (v *register) Type() types.Type { return v.typ } +func (v *register) setType(typ types.Type) { v.typ = typ } +func (v *register) Name() string { return fmt.Sprintf("t%d", v.num) } +func (v *register) setNum(num int) { v.num = num } +func (v *register) Referrers() *[]Instruction { return &v.referrers } +func (v *register) Pos() token.Pos { return v.pos } +func (v *register) setPos(pos token.Pos) { v.pos = pos } + +func (v *anInstruction) Parent() *Function { return v.block.parent } +func (v *anInstruction) Block() *BasicBlock { return v.block } +func (v *anInstruction) setBlock(block *BasicBlock) { v.block = block } +func (v *anInstruction) Referrers() *[]Instruction { return nil } + +func (t *Type) Name() string { return t.object.Name() } +func (t *Type) Pos() token.Pos { return t.object.Pos() } +func (t *Type) Type() types.Type { return t.object.Type() } +func (t *Type) Token() token.Token { return token.TYPE } +func (t *Type) Object() types.Object { return t.object } +func (t *Type) String() string { return t.RelString(nil) } +func (t *Type) Package() *Package { return t.pkg } +func (t *Type) RelString(from *types.Package) string { return relString(t, from) } + +func (c *NamedConst) Name() string { return c.object.Name() } +func (c *NamedConst) Pos() token.Pos { return c.object.Pos() } +func (c *NamedConst) String() string { return c.RelString(nil) } +func (c *NamedConst) Type() types.Type { return c.object.Type() } +func (c *NamedConst) Token() token.Token { return token.CONST } +func (c *NamedConst) Object() types.Object { return c.object } +func (c *NamedConst) Package() *Package { return c.pkg } +func (c *NamedConst) RelString(from *types.Package) string { return relString(c, from) } + +// Func returns the package-level function of the specified name, +// or nil if not found. +// +func (p *Package) Func(name string) (f *Function) { + f, _ = p.Members[name].(*Function) + return +} + +// Var returns the package-level variable of the specified name, +// or nil if not found. +// +func (p *Package) Var(name string) (g *Global) { + g, _ = p.Members[name].(*Global) + return +} + +// Const returns the package-level constant of the specified name, +// or nil if not found. +// +func (p *Package) Const(name string) (c *NamedConst) { + c, _ = p.Members[name].(*NamedConst) + return +} + +// Type returns the package-level type of the specified name, +// or nil if not found. +// +func (p *Package) Type(name string) (t *Type) { + t, _ = p.Members[name].(*Type) + return +} + +func (v *Call) Pos() token.Pos { return v.Call.pos } +func (s *Defer) Pos() token.Pos { return s.pos } +func (s *Go) Pos() token.Pos { return s.pos } +func (s *MapUpdate) Pos() token.Pos { return s.pos } +func (s *Panic) Pos() token.Pos { return s.pos } +func (s *Return) Pos() token.Pos { return s.pos } +func (s *Send) Pos() token.Pos { return s.pos } +func (s *Store) Pos() token.Pos { return s.pos } +func (s *If) Pos() token.Pos { return token.NoPos } +func (s *Jump) Pos() token.Pos { return token.NoPos } +func (s *RunDefers) Pos() token.Pos { return token.NoPos } +func (s *DebugRef) Pos() token.Pos { return s.Expr.Pos() } + +// Operands. + +func (v *Alloc) Operands(rands []*Value) []*Value { + return rands +} + +func (v *BinOp) Operands(rands []*Value) []*Value { + return append(rands, &v.X, &v.Y) +} + +func (c *CallCommon) Operands(rands []*Value) []*Value { + rands = append(rands, &c.Value) + for i := range c.Args { + rands = append(rands, &c.Args[i]) + } + return rands +} + +func (s *Go) Operands(rands []*Value) []*Value { + return s.Call.Operands(rands) +} + +func (s *Call) Operands(rands []*Value) []*Value { + return s.Call.Operands(rands) +} + +func (s *Defer) Operands(rands []*Value) []*Value { + return s.Call.Operands(rands) +} + +func (v *ChangeInterface) Operands(rands []*Value) []*Value { + return append(rands, &v.X) +} + +func (v *ChangeType) Operands(rands []*Value) []*Value { + return append(rands, &v.X) +} + +func (v *Convert) Operands(rands []*Value) []*Value { + return append(rands, &v.X) +} + +func (s *DebugRef) Operands(rands []*Value) []*Value { + return append(rands, &s.X) +} + +func (v *Extract) Operands(rands []*Value) []*Value { + return append(rands, &v.Tuple) +} + +func (v *Field) Operands(rands []*Value) []*Value { + return append(rands, &v.X) +} + +func (v *FieldAddr) Operands(rands []*Value) []*Value { + return append(rands, &v.X) +} + +func (s *If) Operands(rands []*Value) []*Value { + return append(rands, &s.Cond) +} + +func (v *Index) Operands(rands []*Value) []*Value { + return append(rands, &v.X, &v.Index) +} + +func (v *IndexAddr) Operands(rands []*Value) []*Value { + return append(rands, &v.X, &v.Index) +} + +func (*Jump) Operands(rands []*Value) []*Value { + return rands +} + +func (v *Lookup) Operands(rands []*Value) []*Value { + return append(rands, &v.X, &v.Index) +} + +func (v *MakeChan) Operands(rands []*Value) []*Value { + return append(rands, &v.Size) +} + +func (v *MakeClosure) Operands(rands []*Value) []*Value { + rands = append(rands, &v.Fn) + for i := range v.Bindings { + rands = append(rands, &v.Bindings[i]) + } + return rands +} + +func (v *MakeInterface) Operands(rands []*Value) []*Value { + return append(rands, &v.X) +} + +func (v *MakeMap) Operands(rands []*Value) []*Value { + return append(rands, &v.Reserve) +} + +func (v *MakeSlice) Operands(rands []*Value) []*Value { + return append(rands, &v.Len, &v.Cap) +} + +func (v *MapUpdate) Operands(rands []*Value) []*Value { + return append(rands, &v.Map, &v.Key, &v.Value) +} + +func (v *Next) Operands(rands []*Value) []*Value { + return append(rands, &v.Iter) +} + +func (s *Panic) Operands(rands []*Value) []*Value { + return append(rands, &s.X) +} + +func (v *Phi) Operands(rands []*Value) []*Value { + for i := range v.Edges { + rands = append(rands, &v.Edges[i]) + } + return rands +} + +func (v *Range) Operands(rands []*Value) []*Value { + return append(rands, &v.X) +} + +func (s *Return) Operands(rands []*Value) []*Value { + for i := range s.Results { + rands = append(rands, &s.Results[i]) + } + return rands +} + +func (*RunDefers) Operands(rands []*Value) []*Value { + return rands +} + +func (v *Select) Operands(rands []*Value) []*Value { + for i := range v.States { + rands = append(rands, &v.States[i].Chan, &v.States[i].Send) + } + return rands +} + +func (s *Send) Operands(rands []*Value) []*Value { + return append(rands, &s.Chan, &s.X) +} + +func (v *Slice) Operands(rands []*Value) []*Value { + return append(rands, &v.X, &v.Low, &v.High, &v.Max) +} + +func (s *Store) Operands(rands []*Value) []*Value { + return append(rands, &s.Addr, &s.Val) +} + +func (v *TypeAssert) Operands(rands []*Value) []*Value { + return append(rands, &v.X) +} + +func (v *UnOp) Operands(rands []*Value) []*Value { + return append(rands, &v.X) +} + +// Non-Instruction Values: +func (v *Builtin) Operands(rands []*Value) []*Value { return rands } +func (v *FreeVar) Operands(rands []*Value) []*Value { return rands } +func (v *Const) Operands(rands []*Value) []*Value { return rands } +func (v *Function) Operands(rands []*Value) []*Value { return rands } +func (v *Global) Operands(rands []*Value) []*Value { return rands } +func (v *Parameter) Operands(rands []*Value) []*Value { return rands } diff --git a/vendor/golang.org/x/tools/go/ssa/ssautil/load.go b/vendor/golang.org/x/tools/go/ssa/ssautil/load.go new file mode 100644 index 0000000..c2b8ce1 --- /dev/null +++ b/vendor/golang.org/x/tools/go/ssa/ssautil/load.go @@ -0,0 +1,95 @@ +// Copyright 2015 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package ssautil + +// This file defines utility functions for constructing programs in SSA form. + +import ( + "go/ast" + "go/token" + + "golang.org/x/tools/go/loader" + "golang.org/x/tools/go/ssa" + "golang.org/x/tools/go/types" +) + +// CreateProgram returns a new program in SSA form, given a program +// loaded from source. An SSA package is created for each transitively +// error-free package of lprog. +// +// Code for bodies of functions is not built until BuildAll() is called +// on the result. +// +// mode controls diagnostics and checking during SSA construction. +// +func CreateProgram(lprog *loader.Program, mode ssa.BuilderMode) *ssa.Program { + prog := ssa.NewProgram(lprog.Fset, mode) + + for _, info := range lprog.AllPackages { + if info.TransitivelyErrorFree { + prog.CreatePackage(info.Pkg, info.Files, &info.Info, info.Importable) + } + } + + return prog +} + +// BuildPackage builds an SSA program with IR for a single package. +// +// It populates pkg by type-checking the specified file ASTs. All +// dependencies are loaded using the importer specified by tc, which +// typically loads compiler export data; SSA code cannot be built for +// those packages. BuildPackage then constructs an ssa.Program with all +// dependency packages created, and builds and returns the SSA package +// corresponding to pkg. +// +// The caller must have set pkg.Path() to the import path. +// +// The operation fails if there were any type-checking or import errors. +// +// See ../ssa/example_test.go for an example. +// +func BuildPackage(tc *types.Config, fset *token.FileSet, pkg *types.Package, files []*ast.File, mode ssa.BuilderMode) (*ssa.Package, *types.Info, error) { + if fset == nil { + panic("no token.FileSet") + } + if pkg.Path() == "" { + panic("package has no import path") + } + + info := &types.Info{ + Types: make(map[ast.Expr]types.TypeAndValue), + Defs: make(map[*ast.Ident]types.Object), + Uses: make(map[*ast.Ident]types.Object), + Implicits: make(map[ast.Node]types.Object), + Scopes: make(map[ast.Node]*types.Scope), + Selections: make(map[*ast.SelectorExpr]*types.Selection), + } + if err := types.NewChecker(tc, fset, pkg, info).Files(files); err != nil { + return nil, nil, err + } + + prog := ssa.NewProgram(fset, mode) + + // Create SSA packages for all imports. + // Order is not significant. + created := make(map[*types.Package]bool) + var createAll func(pkgs []*types.Package) + createAll = func(pkgs []*types.Package) { + for _, p := range pkgs { + if !created[p] { + created[p] = true + prog.CreatePackage(p, nil, nil, true) + createAll(p.Imports()) + } + } + } + createAll(pkg.Imports()) + + // Create and build the primary package. + ssapkg := prog.CreatePackage(pkg, files, info, false) + ssapkg.Build() + return ssapkg, info, nil +} diff --git a/vendor/golang.org/x/tools/go/ssa/ssautil/switch.go b/vendor/golang.org/x/tools/go/ssa/ssautil/switch.go new file mode 100644 index 0000000..70fff9c --- /dev/null +++ b/vendor/golang.org/x/tools/go/ssa/ssautil/switch.go @@ -0,0 +1,234 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package ssautil + +// This file implements discovery of switch and type-switch constructs +// from low-level control flow. +// +// Many techniques exist for compiling a high-level switch with +// constant cases to efficient machine code. The optimal choice will +// depend on the data type, the specific case values, the code in the +// body of each case, and the hardware. +// Some examples: +// - a lookup table (for a switch that maps constants to constants) +// - a computed goto +// - a binary tree +// - a perfect hash +// - a two-level switch (to partition constant strings by their first byte). + +import ( + "bytes" + "fmt" + "go/token" + + "golang.org/x/tools/go/ssa" + "golang.org/x/tools/go/types" +) + +// A ConstCase represents a single constant comparison. +// It is part of a Switch. +type ConstCase struct { + Block *ssa.BasicBlock // block performing the comparison + Body *ssa.BasicBlock // body of the case + Value *ssa.Const // case comparand +} + +// A TypeCase represents a single type assertion. +// It is part of a Switch. +type TypeCase struct { + Block *ssa.BasicBlock // block performing the type assert + Body *ssa.BasicBlock // body of the case + Type types.Type // case type + Binding ssa.Value // value bound by this case +} + +// A Switch is a logical high-level control flow operation +// (a multiway branch) discovered by analysis of a CFG containing +// only if/else chains. It is not part of the ssa.Instruction set. +// +// One of ConstCases and TypeCases has length >= 2; +// the other is nil. +// +// In a value switch, the list of cases may contain duplicate constants. +// A type switch may contain duplicate types, or types assignable +// to an interface type also in the list. +// TODO(adonovan): eliminate such duplicates. +// +type Switch struct { + Start *ssa.BasicBlock // block containing start of if/else chain + X ssa.Value // the switch operand + ConstCases []ConstCase // ordered list of constant comparisons + TypeCases []TypeCase // ordered list of type assertions + Default *ssa.BasicBlock // successor if all comparisons fail +} + +func (sw *Switch) String() string { + // We represent each block by the String() of its + // first Instruction, e.g. "print(42:int)". + var buf bytes.Buffer + if sw.ConstCases != nil { + fmt.Fprintf(&buf, "switch %s {\n", sw.X.Name()) + for _, c := range sw.ConstCases { + fmt.Fprintf(&buf, "case %s: %s\n", c.Value, c.Body.Instrs[0]) + } + } else { + fmt.Fprintf(&buf, "switch %s.(type) {\n", sw.X.Name()) + for _, c := range sw.TypeCases { + fmt.Fprintf(&buf, "case %s %s: %s\n", + c.Binding.Name(), c.Type, c.Body.Instrs[0]) + } + } + if sw.Default != nil { + fmt.Fprintf(&buf, "default: %s\n", sw.Default.Instrs[0]) + } + fmt.Fprintf(&buf, "}") + return buf.String() +} + +// Switches examines the control-flow graph of fn and returns the +// set of inferred value and type switches. A value switch tests an +// ssa.Value for equality against two or more compile-time constant +// values. Switches involving link-time constants (addresses) are +// ignored. A type switch type-asserts an ssa.Value against two or +// more types. +// +// The switches are returned in dominance order. +// +// The resulting switches do not necessarily correspond to uses of the +// 'switch' keyword in the source: for example, a single source-level +// switch statement with non-constant cases may result in zero, one or +// many Switches, one per plural sequence of constant cases. +// Switches may even be inferred from if/else- or goto-based control flow. +// (In general, the control flow constructs of the source program +// cannot be faithfully reproduced from the SSA representation.) +// +func Switches(fn *ssa.Function) []Switch { + // Traverse the CFG in dominance order, so we don't + // enter an if/else-chain in the middle. + var switches []Switch + seen := make(map[*ssa.BasicBlock]bool) // TODO(adonovan): opt: use ssa.blockSet + for _, b := range fn.DomPreorder() { + if x, k := isComparisonBlock(b); x != nil { + // Block b starts a switch. + sw := Switch{Start: b, X: x} + valueSwitch(&sw, k, seen) + if len(sw.ConstCases) > 1 { + switches = append(switches, sw) + } + } + + if y, x, T := isTypeAssertBlock(b); y != nil { + // Block b starts a type switch. + sw := Switch{Start: b, X: x} + typeSwitch(&sw, y, T, seen) + if len(sw.TypeCases) > 1 { + switches = append(switches, sw) + } + } + } + return switches +} + +func valueSwitch(sw *Switch, k *ssa.Const, seen map[*ssa.BasicBlock]bool) { + b := sw.Start + x := sw.X + for x == sw.X { + if seen[b] { + break + } + seen[b] = true + + sw.ConstCases = append(sw.ConstCases, ConstCase{ + Block: b, + Body: b.Succs[0], + Value: k, + }) + b = b.Succs[1] + if len(b.Instrs) > 2 { + // Block b contains not just 'if x == k', + // so it may have side effects that + // make it unsafe to elide. + break + } + if len(b.Preds) != 1 { + // Block b has multiple predecessors, + // so it cannot be treated as a case. + break + } + x, k = isComparisonBlock(b) + } + sw.Default = b +} + +func typeSwitch(sw *Switch, y ssa.Value, T types.Type, seen map[*ssa.BasicBlock]bool) { + b := sw.Start + x := sw.X + for x == sw.X { + if seen[b] { + break + } + seen[b] = true + + sw.TypeCases = append(sw.TypeCases, TypeCase{ + Block: b, + Body: b.Succs[0], + Type: T, + Binding: y, + }) + b = b.Succs[1] + if len(b.Instrs) > 4 { + // Block b contains not just + // {TypeAssert; Extract #0; Extract #1; If} + // so it may have side effects that + // make it unsafe to elide. + break + } + if len(b.Preds) != 1 { + // Block b has multiple predecessors, + // so it cannot be treated as a case. + break + } + y, x, T = isTypeAssertBlock(b) + } + sw.Default = b +} + +// isComparisonBlock returns the operands (v, k) if a block ends with +// a comparison v==k, where k is a compile-time constant. +// +func isComparisonBlock(b *ssa.BasicBlock) (v ssa.Value, k *ssa.Const) { + if n := len(b.Instrs); n >= 2 { + if i, ok := b.Instrs[n-1].(*ssa.If); ok { + if binop, ok := i.Cond.(*ssa.BinOp); ok && binop.Block() == b && binop.Op == token.EQL { + if k, ok := binop.Y.(*ssa.Const); ok { + return binop.X, k + } + if k, ok := binop.X.(*ssa.Const); ok { + return binop.Y, k + } + } + } + } + return +} + +// isTypeAssertBlock returns the operands (y, x, T) if a block ends with +// a type assertion "if y, ok := x.(T); ok {". +// +func isTypeAssertBlock(b *ssa.BasicBlock) (y, x ssa.Value, T types.Type) { + if n := len(b.Instrs); n >= 4 { + if i, ok := b.Instrs[n-1].(*ssa.If); ok { + if ext1, ok := i.Cond.(*ssa.Extract); ok && ext1.Block() == b && ext1.Index == 1 { + if ta, ok := ext1.Tuple.(*ssa.TypeAssert); ok && ta.Block() == b { + // hack: relies upon instruction ordering. + if ext0, ok := b.Instrs[n-3].(*ssa.Extract); ok { + return ext0, ta.X, ta.AssertedType + } + } + } + } + } + return +} diff --git a/vendor/golang.org/x/tools/go/ssa/ssautil/visit.go b/vendor/golang.org/x/tools/go/ssa/ssautil/visit.go new file mode 100644 index 0000000..30843c3 --- /dev/null +++ b/vendor/golang.org/x/tools/go/ssa/ssautil/visit.go @@ -0,0 +1,66 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package ssautil // import "golang.org/x/tools/go/ssa/ssautil" + +import "golang.org/x/tools/go/ssa" + +// This file defines utilities for visiting the SSA representation of +// a Program. +// +// TODO(adonovan): test coverage. + +// AllFunctions finds and returns the set of functions potentially +// needed by program prog, as determined by a simple linker-style +// reachability algorithm starting from the members and method-sets of +// each package. The result may include anonymous functions and +// synthetic wrappers. +// +// Precondition: all packages are built. +// +func AllFunctions(prog *ssa.Program) map[*ssa.Function]bool { + visit := visitor{ + prog: prog, + seen: make(map[*ssa.Function]bool), + } + visit.program() + return visit.seen +} + +type visitor struct { + prog *ssa.Program + seen map[*ssa.Function]bool +} + +func (visit *visitor) program() { + for _, pkg := range visit.prog.AllPackages() { + for _, mem := range pkg.Members { + if fn, ok := mem.(*ssa.Function); ok { + visit.function(fn) + } + } + } + for _, T := range visit.prog.RuntimeTypes() { + mset := visit.prog.MethodSets.MethodSet(T) + for i, n := 0, mset.Len(); i < n; i++ { + visit.function(visit.prog.Method(mset.At(i))) + } + } +} + +func (visit *visitor) function(fn *ssa.Function) { + if !visit.seen[fn] { + visit.seen[fn] = true + var buf [10]*ssa.Value // avoid alloc in common case + for _, b := range fn.Blocks { + for _, instr := range b.Instrs { + for _, op := range instr.Operands(buf[:0]) { + if fn, ok := (*op).(*ssa.Function); ok { + visit.function(fn) + } + } + } + } + } +} diff --git a/vendor/golang.org/x/tools/go/ssa/testmain.go b/vendor/golang.org/x/tools/go/ssa/testmain.go new file mode 100644 index 0000000..a7b1242 --- /dev/null +++ b/vendor/golang.org/x/tools/go/ssa/testmain.go @@ -0,0 +1,296 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package ssa + +// CreateTestMainPackage synthesizes a main package that runs all the +// tests of the supplied packages. +// It is closely coupled to $GOROOT/src/cmd/go/test.go and $GOROOT/src/testing. + +import ( + "go/ast" + "go/token" + "os" + "sort" + "strings" + + "golang.org/x/tools/go/exact" + "golang.org/x/tools/go/types" +) + +// FindTests returns the list of packages that define at least one Test, +// Example or Benchmark function (as defined by "go test"), and the +// lists of all such functions. +// +func FindTests(pkgs []*Package) (testpkgs []*Package, tests, benchmarks, examples []*Function) { + if len(pkgs) == 0 { + return + } + prog := pkgs[0].Prog + + // The first two of these may be nil: if the program doesn't import "testing", + // it can't contain any tests, but it may yet contain Examples. + var testSig *types.Signature // func(*testing.T) + var benchmarkSig *types.Signature // func(*testing.B) + var exampleSig = types.NewSignature(nil, nil, nil, false) // func() + + // Obtain the types from the parameters of testing.Main(). + if testingPkg := prog.ImportedPackage("testing"); testingPkg != nil { + params := testingPkg.Func("Main").Signature.Params() + testSig = funcField(params.At(1).Type()) + benchmarkSig = funcField(params.At(2).Type()) + } + + seen := make(map[*Package]bool) + for _, pkg := range pkgs { + if pkg.Prog != prog { + panic("wrong Program") + } + + // TODO(adonovan): use a stable order, e.g. lexical. + for _, mem := range pkg.Members { + if f, ok := mem.(*Function); ok && + ast.IsExported(f.Name()) && + strings.HasSuffix(prog.Fset.Position(f.Pos()).Filename, "_test.go") { + + switch { + case testSig != nil && isTestSig(f, "Test", testSig): + tests = append(tests, f) + case benchmarkSig != nil && isTestSig(f, "Benchmark", benchmarkSig): + benchmarks = append(benchmarks, f) + case isTestSig(f, "Example", exampleSig): + examples = append(examples, f) + default: + continue + } + + if !seen[pkg] { + seen[pkg] = true + testpkgs = append(testpkgs, pkg) + } + } + } + } + return +} + +// Like isTest, but checks the signature too. +func isTestSig(f *Function, prefix string, sig *types.Signature) bool { + return isTest(f.Name(), prefix) && types.Identical(f.Signature, sig) +} + +// If non-nil, testMainStartBodyHook is called immediately after +// startBody for main.init and main.main, making it easy for users to +// add custom imports and initialization steps for proprietary build +// systems that don't exactly follow 'go test' conventions. +var testMainStartBodyHook func(*Function) + +// CreateTestMainPackage creates and returns a synthetic "main" +// package that runs all the tests of the supplied packages, similar +// to the one that would be created by the 'go test' tool. +// +// It returns nil if the program contains no tests. +// +func (prog *Program) CreateTestMainPackage(pkgs ...*Package) *Package { + pkgs, tests, benchmarks, examples := FindTests(pkgs) + if len(pkgs) == 0 { + return nil + } + + testmain := &Package{ + Prog: prog, + Members: make(map[string]Member), + values: make(map[types.Object]Value), + Object: types.NewPackage("test$main", "main"), + } + + // Build package's init function. + init := &Function{ + name: "init", + Signature: new(types.Signature), + Synthetic: "package initializer", + Pkg: testmain, + Prog: prog, + } + init.startBody() + + if testMainStartBodyHook != nil { + testMainStartBodyHook(init) + } + + // Initialize packages to test. + var pkgpaths []string + for _, pkg := range pkgs { + var v Call + v.Call.Value = pkg.init + v.setType(types.NewTuple()) + init.emit(&v) + + pkgpaths = append(pkgpaths, pkg.Object.Path()) + } + sort.Strings(pkgpaths) + init.emit(new(Return)) + init.finishBody() + testmain.init = init + testmain.Object.MarkComplete() + testmain.Members[init.name] = init + + // For debugging convenience, define an unexported const + // that enumerates the packages. + packagesConst := types.NewConst(token.NoPos, testmain.Object, "packages", tString, + exact.MakeString(strings.Join(pkgpaths, " "))) + memberFromObject(testmain, packagesConst, nil) + + // Create main *types.Func and *ssa.Function + mainFunc := types.NewFunc(token.NoPos, testmain.Object, "main", new(types.Signature)) + memberFromObject(testmain, mainFunc, nil) + main := testmain.Func("main") + main.Synthetic = "test main function" + + main.startBody() + + if testMainStartBodyHook != nil { + testMainStartBodyHook(main) + } + + if testingPkg := prog.ImportedPackage("testing"); testingPkg != nil { + testingMain := testingPkg.Func("Main") + testingMainParams := testingMain.Signature.Params() + + // The generated code is as if compiled from this: + // + // func main() { + // match := func(_, _ string) (bool, error) { return true, nil } + // tests := []testing.InternalTest{{"TestFoo", TestFoo}, ...} + // benchmarks := []testing.InternalBenchmark{...} + // examples := []testing.InternalExample{...} + // testing.Main(match, tests, benchmarks, examples) + // } + + matcher := &Function{ + name: "matcher", + Signature: testingMainParams.At(0).Type().(*types.Signature), + Synthetic: "test matcher predicate", + parent: main, + Pkg: testmain, + Prog: prog, + } + main.AnonFuncs = append(main.AnonFuncs, matcher) + matcher.startBody() + matcher.emit(&Return{Results: []Value{vTrue, nilConst(types.Universe.Lookup("error").Type())}}) + matcher.finishBody() + + // Emit call: testing.Main(matcher, tests, benchmarks, examples). + var c Call + c.Call.Value = testingMain + c.Call.Args = []Value{ + matcher, + testMainSlice(main, tests, testingMainParams.At(1).Type()), + testMainSlice(main, benchmarks, testingMainParams.At(2).Type()), + testMainSlice(main, examples, testingMainParams.At(3).Type()), + } + emitTailCall(main, &c) + } else { + // The program does not import "testing", but FindTests + // returned non-nil, which must mean there were Examples + // but no Tests or Benchmarks. + // We'll simply call them from testmain.main; this will + // ensure they don't panic, but will not check any + // "Output:" comments. + for _, eg := range examples { + var c Call + c.Call.Value = eg + c.setType(types.NewTuple()) + main.emit(&c) + } + main.emit(&Return{}) + main.currentBlock = nil + } + + main.finishBody() + + testmain.Members["main"] = main + + if prog.mode&PrintPackages != 0 { + printMu.Lock() + testmain.WriteTo(os.Stdout) + printMu.Unlock() + } + + if prog.mode&SanityCheckFunctions != 0 { + sanityCheckPackage(testmain) + } + + prog.packages[testmain.Object] = testmain + + return testmain +} + +// testMainSlice emits to fn code to construct a slice of type slice +// (one of []testing.Internal{Test,Benchmark,Example}) for all +// functions in testfuncs. It returns the slice value. +// +func testMainSlice(fn *Function, testfuncs []*Function, slice types.Type) Value { + if testfuncs == nil { + return nilConst(slice) + } + + tElem := slice.(*types.Slice).Elem() + tPtrString := types.NewPointer(tString) + tPtrElem := types.NewPointer(tElem) + tPtrFunc := types.NewPointer(funcField(slice)) + + // Emit: array = new [n]testing.InternalTest + tArray := types.NewArray(tElem, int64(len(testfuncs))) + array := emitNew(fn, tArray, token.NoPos) + array.Comment = "test main" + for i, testfunc := range testfuncs { + // Emit: pitem = &array[i] + ia := &IndexAddr{X: array, Index: intConst(int64(i))} + ia.setType(tPtrElem) + pitem := fn.emit(ia) + + // Emit: pname = &pitem.Name + fa := &FieldAddr{X: pitem, Field: 0} // .Name + fa.setType(tPtrString) + pname := fn.emit(fa) + + // Emit: *pname = "testfunc" + emitStore(fn, pname, stringConst(testfunc.Name()), token.NoPos) + + // Emit: pfunc = &pitem.F + fa = &FieldAddr{X: pitem, Field: 1} // .F + fa.setType(tPtrFunc) + pfunc := fn.emit(fa) + + // Emit: *pfunc = testfunc + emitStore(fn, pfunc, testfunc, token.NoPos) + } + + // Emit: slice array[:] + sl := &Slice{X: array} + sl.setType(slice) + return fn.emit(sl) +} + +// Given the type of one of the three slice parameters of testing.Main, +// returns the function type. +func funcField(slice types.Type) *types.Signature { + return slice.(*types.Slice).Elem().Underlying().(*types.Struct).Field(1).Type().(*types.Signature) +} + +// Plundered from $GOROOT/src/cmd/go/test.go + +// isTest tells whether name looks like a test (or benchmark, according to prefix). +// It is a Test (say) if there is a character after Test that is not a lower-case letter. +// We don't want TesticularCancer. +func isTest(name, prefix string) bool { + if !strings.HasPrefix(name, prefix) { + return false + } + if len(name) == len(prefix) { // "Test" is ok + return true + } + return ast.IsExported(name[len(prefix):]) +} diff --git a/vendor/golang.org/x/tools/go/ssa/util.go b/vendor/golang.org/x/tools/go/ssa/util.go new file mode 100644 index 0000000..4f9d43d --- /dev/null +++ b/vendor/golang.org/x/tools/go/ssa/util.go @@ -0,0 +1,119 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package ssa + +// This file defines a number of miscellaneous utility functions. + +import ( + "fmt" + "go/ast" + "go/token" + "io" + "os" + + "golang.org/x/tools/go/ast/astutil" + "golang.org/x/tools/go/types" +) + +//// AST utilities + +func unparen(e ast.Expr) ast.Expr { return astutil.Unparen(e) } + +// isBlankIdent returns true iff e is an Ident with name "_". +// They have no associated types.Object, and thus no type. +// +func isBlankIdent(e ast.Expr) bool { + id, ok := e.(*ast.Ident) + return ok && id.Name == "_" +} + +//// Type utilities. Some of these belong in go/types. + +// isPointer returns true for types whose underlying type is a pointer. +func isPointer(typ types.Type) bool { + _, ok := typ.Underlying().(*types.Pointer) + return ok +} + +func isInterface(T types.Type) bool { return types.IsInterface(T) } + +// deref returns a pointer's element type; otherwise it returns typ. +func deref(typ types.Type) types.Type { + if p, ok := typ.Underlying().(*types.Pointer); ok { + return p.Elem() + } + return typ +} + +// recvType returns the receiver type of method obj. +func recvType(obj *types.Func) types.Type { + return obj.Type().(*types.Signature).Recv().Type() +} + +// DefaultType returns the default "typed" type for an "untyped" type; +// it returns the incoming type for all other types. The default type +// for untyped nil is untyped nil. +// +// Exported to ssa/interp. +// +// TODO(gri): this is a copy of go/types.defaultType; export that function. +// +func DefaultType(typ types.Type) types.Type { + if t, ok := typ.(*types.Basic); ok { + k := t.Kind() + switch k { + case types.UntypedBool: + k = types.Bool + case types.UntypedInt: + k = types.Int + case types.UntypedRune: + k = types.Rune + case types.UntypedFloat: + k = types.Float64 + case types.UntypedComplex: + k = types.Complex128 + case types.UntypedString: + k = types.String + } + typ = types.Typ[k] + } + return typ +} + +// logStack prints the formatted "start" message to stderr and +// returns a closure that prints the corresponding "end" message. +// Call using 'defer logStack(...)()' to show builder stack on panic. +// Don't forget trailing parens! +// +func logStack(format string, args ...interface{}) func() { + msg := fmt.Sprintf(format, args...) + io.WriteString(os.Stderr, msg) + io.WriteString(os.Stderr, "\n") + return func() { + io.WriteString(os.Stderr, msg) + io.WriteString(os.Stderr, " end\n") + } +} + +// newVar creates a 'var' for use in a types.Tuple. +func newVar(name string, typ types.Type) *types.Var { + return types.NewParam(token.NoPos, nil, name, typ) +} + +// anonVar creates an anonymous 'var' for use in a types.Tuple. +func anonVar(typ types.Type) *types.Var { + return newVar("", typ) +} + +var lenResults = types.NewTuple(anonVar(tInt)) + +// makeLen returns the len builtin specialized to type func(T)int. +func makeLen(T types.Type) *Builtin { + lenParams := types.NewTuple(anonVar(T)) + return &Builtin{ + name: "len", + sig: types.NewSignature(nil, lenParams, lenResults, false), + } +} diff --git a/vendor/golang.org/x/tools/go/ssa/wrappers.go b/vendor/golang.org/x/tools/go/ssa/wrappers.go new file mode 100644 index 0000000..ff1eac5 --- /dev/null +++ b/vendor/golang.org/x/tools/go/ssa/wrappers.go @@ -0,0 +1,294 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package ssa + +// This file defines synthesis of Functions that delegate to declared +// methods; they come in three kinds: +// +// (1) wrappers: methods that wrap declared methods, performing +// implicit pointer indirections and embedded field selections. +// +// (2) thunks: funcs that wrap declared methods. Like wrappers, +// thunks perform indirections and field selections. The thunk's +// first parameter is used as the receiver for the method call. +// +// (3) bounds: funcs that wrap declared methods. The bound's sole +// free variable, supplied by a closure, is used as the receiver +// for the method call. No indirections or field selections are +// performed since they can be done before the call. + +import ( + "fmt" + + "golang.org/x/tools/go/types" +) + +// -- wrappers ----------------------------------------------------------- + +// makeWrapper returns a synthetic method that delegates to the +// declared method denoted by meth.Obj(), first performing any +// necessary pointer indirections or field selections implied by meth. +// +// The resulting method's receiver type is meth.Recv(). +// +// This function is versatile but quite subtle! Consider the +// following axes of variation when making changes: +// - optional receiver indirection +// - optional implicit field selections +// - meth.Obj() may denote a concrete or an interface method +// - the result may be a thunk or a wrapper. +// +// EXCLUSIVE_LOCKS_REQUIRED(prog.methodsMu) +// +func makeWrapper(prog *Program, sel *types.Selection) *Function { + obj := sel.Obj().(*types.Func) // the declared function + sig := sel.Type().(*types.Signature) // type of this wrapper + + var recv *types.Var // wrapper's receiver or thunk's params[0] + name := obj.Name() + var description string + var start int // first regular param + if sel.Kind() == types.MethodExpr { + name += "$thunk" + description = "thunk" + recv = sig.Params().At(0) + start = 1 + } else { + description = "wrapper" + recv = sig.Recv() + } + + description = fmt.Sprintf("%s for %s", description, sel.Obj()) + if prog.mode&LogSource != 0 { + defer logStack("make %s to (%s)", description, recv.Type())() + } + fn := &Function{ + name: name, + method: sel, + object: obj, + Signature: sig, + Synthetic: description, + Prog: prog, + pos: obj.Pos(), + } + fn.startBody() + fn.addSpilledParam(recv) + createParams(fn, start) + + indices := sel.Index() + + var v Value = fn.Locals[0] // spilled receiver + if isPointer(sel.Recv()) { + v = emitLoad(fn, v) + + // For simple indirection wrappers, perform an informative nil-check: + // "value method (T).f called using nil *T pointer" + if len(indices) == 1 && !isPointer(recvType(obj)) { + var c Call + c.Call.Value = &Builtin{ + name: "ssa:wrapnilchk", + sig: types.NewSignature(nil, + types.NewTuple(anonVar(sel.Recv()), anonVar(tString), anonVar(tString)), + types.NewTuple(anonVar(sel.Recv())), false), + } + c.Call.Args = []Value{ + v, + stringConst(deref(sel.Recv()).String()), + stringConst(sel.Obj().Name()), + } + c.setType(v.Type()) + v = fn.emit(&c) + } + } + + // Invariant: v is a pointer, either + // value of *A receiver param, or + // address of A spilled receiver. + + // We use pointer arithmetic (FieldAddr possibly followed by + // Load) in preference to value extraction (Field possibly + // preceded by Load). + + v = emitImplicitSelections(fn, v, indices[:len(indices)-1]) + + // Invariant: v is a pointer, either + // value of implicit *C field, or + // address of implicit C field. + + var c Call + if r := recvType(obj); !isInterface(r) { // concrete method + if !isPointer(r) { + v = emitLoad(fn, v) + } + c.Call.Value = prog.declaredFunc(obj) + c.Call.Args = append(c.Call.Args, v) + } else { + c.Call.Method = obj + c.Call.Value = emitLoad(fn, v) + } + for _, arg := range fn.Params[1:] { + c.Call.Args = append(c.Call.Args, arg) + } + emitTailCall(fn, &c) + fn.finishBody() + return fn +} + +// createParams creates parameters for wrapper method fn based on its +// Signature.Params, which do not include the receiver. +// start is the index of the first regular parameter to use. +// +func createParams(fn *Function, start int) { + var last *Parameter + tparams := fn.Signature.Params() + for i, n := start, tparams.Len(); i < n; i++ { + last = fn.addParamObj(tparams.At(i)) + } + if fn.Signature.Variadic() { + last.typ = types.NewSlice(last.typ) + } +} + +// -- bounds ----------------------------------------------------------- + +// makeBound returns a bound method wrapper (or "bound"), a synthetic +// function that delegates to a concrete or interface method denoted +// by obj. The resulting function has no receiver, but has one free +// variable which will be used as the method's receiver in the +// tail-call. +// +// Use MakeClosure with such a wrapper to construct a bound method +// closure. e.g.: +// +// type T int or: type T interface { meth() } +// func (t T) meth() +// var t T +// f := t.meth +// f() // calls t.meth() +// +// f is a closure of a synthetic wrapper defined as if by: +// +// f := func() { return t.meth() } +// +// Unlike makeWrapper, makeBound need perform no indirection or field +// selections because that can be done before the closure is +// constructed. +// +// EXCLUSIVE_LOCKS_ACQUIRED(meth.Prog.methodsMu) +// +func makeBound(prog *Program, obj *types.Func) *Function { + prog.methodsMu.Lock() + defer prog.methodsMu.Unlock() + fn, ok := prog.bounds[obj] + if !ok { + description := fmt.Sprintf("bound method wrapper for %s", obj) + if prog.mode&LogSource != 0 { + defer logStack("%s", description)() + } + fn = &Function{ + name: obj.Name() + "$bound", + object: obj, + Signature: changeRecv(obj.Type().(*types.Signature), nil), // drop receiver + Synthetic: description, + Prog: prog, + pos: obj.Pos(), + } + + fv := &FreeVar{name: "recv", typ: recvType(obj), parent: fn} + fn.FreeVars = []*FreeVar{fv} + fn.startBody() + createParams(fn, 0) + var c Call + + if !isInterface(recvType(obj)) { // concrete + c.Call.Value = prog.declaredFunc(obj) + c.Call.Args = []Value{fv} + } else { + c.Call.Value = fv + c.Call.Method = obj + } + for _, arg := range fn.Params { + c.Call.Args = append(c.Call.Args, arg) + } + emitTailCall(fn, &c) + fn.finishBody() + + prog.bounds[obj] = fn + } + return fn +} + +// -- thunks ----------------------------------------------------------- + +// makeThunk returns a thunk, a synthetic function that delegates to a +// concrete or interface method denoted by sel.Obj(). The resulting +// function has no receiver, but has an additional (first) regular +// parameter. +// +// Precondition: sel.Kind() == types.MethodExpr. +// +// type T int or: type T interface { meth() } +// func (t T) meth() +// f := T.meth +// var t T +// f(t) // calls t.meth() +// +// f is a synthetic wrapper defined as if by: +// +// f := func(t T) { return t.meth() } +// +// TODO(adonovan): opt: currently the stub is created even when used +// directly in a function call: C.f(i, 0). This is less efficient +// than inlining the stub. +// +// EXCLUSIVE_LOCKS_ACQUIRED(meth.Prog.methodsMu) +// +func makeThunk(prog *Program, sel *types.Selection) *Function { + if sel.Kind() != types.MethodExpr { + panic(sel) + } + + key := selectionKey{ + kind: sel.Kind(), + recv: sel.Recv(), + obj: sel.Obj(), + index: fmt.Sprint(sel.Index()), + indirect: sel.Indirect(), + } + + prog.methodsMu.Lock() + defer prog.methodsMu.Unlock() + + // Canonicalize key.recv to avoid constructing duplicate thunks. + canonRecv, ok := prog.canon.At(key.recv).(types.Type) + if !ok { + canonRecv = key.recv + prog.canon.Set(key.recv, canonRecv) + } + key.recv = canonRecv + + fn, ok := prog.thunks[key] + if !ok { + fn = makeWrapper(prog, sel) + if fn.Signature.Recv() != nil { + panic(fn) // unexpected receiver + } + prog.thunks[key] = fn + } + return fn +} + +func changeRecv(s *types.Signature, recv *types.Var) *types.Signature { + return types.NewSignature(recv, s.Params(), s.Results(), s.Variadic()) +} + +// selectionKey is like types.Selection but a usable map key. +type selectionKey struct { + kind types.SelectionKind + recv types.Type // canonicalized via Program.canon + obj types.Object + index string + indirect bool +} diff --git a/vendor/golang.org/x/tools/go/types/api.go b/vendor/golang.org/x/tools/go/types/api.go new file mode 100644 index 0000000..5344a39 --- /dev/null +++ b/vendor/golang.org/x/tools/go/types/api.go @@ -0,0 +1,365 @@ +// Copyright 2012 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package types declares the data types and implements +// the algorithms for type-checking of Go packages. +// Use Check and Config.Check to invoke the type-checker. +// +// Type-checking consists of several interdependent phases: +// +// Name resolution maps each identifier (ast.Ident) in the program to the +// language object (Object) it denotes. +// Use Info.{Defs,Uses,Implicits} for the results of name resolution. +// +// Constant folding computes the exact constant value (exact.Value) for +// every expression (ast.Expr) that is a compile-time constant. +// Use Info.Types[expr].Value for the results of constant folding. +// +// Type inference computes the type (Type) of every expression (ast.Expr) +// and checks for compliance with the language specification. +// Use Info.Types[expr].Type for the results of type inference. +// +package types // import "golang.org/x/tools/go/types" + +import ( + "bytes" + "fmt" + "go/ast" + "go/token" + + "golang.org/x/tools/go/exact" +) + +// Check type-checks a package and returns the resulting complete package +// object, or a nil package and the first error. The package is specified +// by a list of *ast.Files and corresponding file set, and the import path +// the package is identified with. The clean path must not be empty or dot ("."). +// +// For more control over type-checking and results, use Config.Check. +func Check(path string, fset *token.FileSet, files []*ast.File) (*Package, error) { + var conf Config + pkg, err := conf.Check(path, fset, files, nil) + if err != nil { + return nil, err + } + return pkg, nil +} + +// An Error describes a type-checking error; it implements the error interface. +// A "soft" error is an error that still permits a valid interpretation of a +// package (such as "unused variable"); "hard" errors may lead to unpredictable +// behavior if ignored. +type Error struct { + Fset *token.FileSet // file set for interpretation of Pos + Pos token.Pos // error position + Msg string // error message + Soft bool // if set, error is "soft" +} + +// Error returns an error string formatted as follows: +// filename:line:column: message +func (err Error) Error() string { + return fmt.Sprintf("%s: %s", err.Fset.Position(err.Pos), err.Msg) +} + +// An importer resolves import paths to Packages. +// The imports map records packages already known, +// indexed by package path. The type-checker +// will invoke Import with Config.Packages. +// An importer must determine the canonical package path and +// check imports to see if it is already present in the map. +// If so, the Importer can return the map entry. Otherwise, +// the importer must load the package data for the given path +// into a new *Package, record it in imports map, and return +// the package. +// TODO(gri) Need to be clearer about requirements of completeness. +type Importer func(map[string]*Package, string) (*Package, error) + +// A Config specifies the configuration for type checking. +// The zero value for Config is a ready-to-use default configuration. +type Config struct { + // If IgnoreFuncBodies is set, function bodies are not + // type-checked. + IgnoreFuncBodies bool + + // If FakeImportC is set, `import "C"` (for packages requiring Cgo) + // declares an empty "C" package and errors are omitted for qualified + // identifiers referring to package C (which won't find an object). + // This feature is intended for the standard library cmd/api tool. + // + // Caution: Effects may be unpredictable due to follow-up errors. + // Do not use casually! + FakeImportC bool + + // Packages is used to look up (and thus canonicalize) packages by + // package path. If Packages is nil, it is set to a new empty map. + // During type-checking, imported packages are added to the map. + Packages map[string]*Package + + // If Error != nil, it is called with each error found + // during type checking; err has dynamic type Error. + // Secondary errors (for instance, to enumerate all types + // involved in an invalid recursive type declaration) have + // error strings that start with a '\t' character. + // If Error == nil, type-checking stops with the first + // error found. + Error func(err error) + + // If Import != nil, it is called for each imported package. + // Otherwise, DefaultImport is called. + Import Importer + + // If Sizes != nil, it provides the sizing functions for package unsafe. + // Otherwise &StdSizes{WordSize: 8, MaxAlign: 8} is used instead. + Sizes Sizes + + // If DisableUnusedImportCheck is set, packages are not checked + // for unused imports. + DisableUnusedImportCheck bool +} + +// DefaultImport is the default importer invoked if Config.Import == nil. +// The declaration: +// +// import _ "golang.org/x/tools/go/gcimporter" +// +// in a client of go/types will initialize DefaultImport to gcimporter.Import. +var DefaultImport Importer + +// Info holds result type information for a type-checked package. +// Only the information for which a map is provided is collected. +// If the package has type errors, the collected information may +// be incomplete. +type Info struct { + // Types maps expressions to their types, and for constant + // expressions, their values. Invalid expressions are omitted. + // + // For (possibly parenthesized) identifiers denoting built-in + // functions, the recorded signatures are call-site specific: + // if the call result is not a constant, the recorded type is + // an argument-specific signature. Otherwise, the recorded type + // is invalid. + // + // Identifiers on the lhs of declarations (i.e., the identifiers + // which are being declared) are collected in the Defs map. + // Identifiers denoting packages are collected in the Uses maps. + Types map[ast.Expr]TypeAndValue + + // Defs maps identifiers to the objects they define (including + // package names, dots "." of dot-imports, and blank "_" identifiers). + // For identifiers that do not denote objects (e.g., the package name + // in package clauses, or symbolic variables t in t := x.(type) of + // type switch headers), the corresponding objects are nil. + // + // For an anonymous field, Defs returns the field *Var it defines. + // + // Invariant: Defs[id] == nil || Defs[id].Pos() == id.Pos() + Defs map[*ast.Ident]Object + + // Uses maps identifiers to the objects they denote. + // + // For an anonymous field, Uses returns the *TypeName it denotes. + // + // Invariant: Uses[id].Pos() != id.Pos() + Uses map[*ast.Ident]Object + + // Implicits maps nodes to their implicitly declared objects, if any. + // The following node and object types may appear: + // + // node declared object + // + // *ast.ImportSpec *PkgName for dot-imports and imports without renames + // *ast.CaseClause type-specific *Var for each type switch case clause (incl. default) + // *ast.Field anonymous struct field or parameter *Var + // + Implicits map[ast.Node]Object + + // Selections maps selector expressions (excluding qualified identifiers) + // to their corresponding selections. + Selections map[*ast.SelectorExpr]*Selection + + // Scopes maps ast.Nodes to the scopes they define. Package scopes are not + // associated with a specific node but with all files belonging to a package. + // Thus, the package scope can be found in the type-checked Package object. + // Scopes nest, with the Universe scope being the outermost scope, enclosing + // the package scope, which contains (one or more) files scopes, which enclose + // function scopes which in turn enclose statement and function literal scopes. + // Note that even though package-level functions are declared in the package + // scope, the function scopes are embedded in the file scope of the file + // containing the function declaration. + // + // The following node types may appear in Scopes: + // + // *ast.File + // *ast.FuncType + // *ast.BlockStmt + // *ast.IfStmt + // *ast.SwitchStmt + // *ast.TypeSwitchStmt + // *ast.CaseClause + // *ast.CommClause + // *ast.ForStmt + // *ast.RangeStmt + // + Scopes map[ast.Node]*Scope + + // InitOrder is the list of package-level initializers in the order in which + // they must be executed. Initializers referring to variables related by an + // initialization dependency appear in topological order, the others appear + // in source order. Variables without an initialization expression do not + // appear in this list. + InitOrder []*Initializer +} + +// TypeOf returns the type of expression e, or nil if not found. +// Precondition: the Types, Uses and Defs maps are populated. +// +func (info *Info) TypeOf(e ast.Expr) Type { + if t, ok := info.Types[e]; ok { + return t.Type + } + if id, _ := e.(*ast.Ident); id != nil { + if obj := info.ObjectOf(id); obj != nil { + return obj.Type() + } + } + return nil +} + +// ObjectOf returns the object denoted by the specified id, +// or nil if not found. +// +// If id is an anonymous struct field, ObjectOf returns the field (*Var) +// it uses, not the type (*TypeName) it defines. +// +// Precondition: the Uses and Defs maps are populated. +// +func (info *Info) ObjectOf(id *ast.Ident) Object { + if obj, _ := info.Defs[id]; obj != nil { + return obj + } + return info.Uses[id] +} + +// TypeAndValue reports the type and value (for constants) +// of the corresponding expression. +type TypeAndValue struct { + mode operandMode + Type Type + Value exact.Value +} + +// TODO(gri) Consider eliminating the IsVoid predicate. Instead, report +// "void" values as regular values but with the empty tuple type. + +// IsVoid reports whether the corresponding expression +// is a function call without results. +func (tv TypeAndValue) IsVoid() bool { + return tv.mode == novalue +} + +// IsType reports whether the corresponding expression specifies a type. +func (tv TypeAndValue) IsType() bool { + return tv.mode == typexpr +} + +// IsBuiltin reports whether the corresponding expression denotes +// a (possibly parenthesized) built-in function. +func (tv TypeAndValue) IsBuiltin() bool { + return tv.mode == builtin +} + +// IsValue reports whether the corresponding expression is a value. +// Builtins are not considered values. Constant values have a non- +// nil Value. +func (tv TypeAndValue) IsValue() bool { + switch tv.mode { + case constant, variable, mapindex, value, commaok: + return true + } + return false +} + +// IsNil reports whether the corresponding expression denotes the +// predeclared value nil. +func (tv TypeAndValue) IsNil() bool { + return tv.mode == value && tv.Type == Typ[UntypedNil] +} + +// Addressable reports whether the corresponding expression +// is addressable (http://golang.org/ref/spec#Address_operators). +func (tv TypeAndValue) Addressable() bool { + return tv.mode == variable +} + +// Assignable reports whether the corresponding expression +// is assignable to (provided a value of the right type). +func (tv TypeAndValue) Assignable() bool { + return tv.mode == variable || tv.mode == mapindex +} + +// HasOk reports whether the corresponding expression may be +// used on the lhs of a comma-ok assignment. +func (tv TypeAndValue) HasOk() bool { + return tv.mode == commaok || tv.mode == mapindex +} + +// An Initializer describes a package-level variable, or a list of variables in case +// of a multi-valued initialization expression, and the corresponding initialization +// expression. +type Initializer struct { + Lhs []*Var // var Lhs = Rhs + Rhs ast.Expr +} + +func (init *Initializer) String() string { + var buf bytes.Buffer + for i, lhs := range init.Lhs { + if i > 0 { + buf.WriteString(", ") + } + buf.WriteString(lhs.Name()) + } + buf.WriteString(" = ") + WriteExpr(&buf, init.Rhs) + return buf.String() +} + +// Check type-checks a package and returns the resulting package object, +// the first error if any, and if info != nil, additional type information. +// The package is marked as complete if no errors occurred, otherwise it is +// incomplete. See Config.Error for controlling behavior in the presence of +// errors. +// +// The package is specified by a list of *ast.Files and corresponding +// file set, and the package path the package is identified with. +// The clean path must not be empty or dot ("."). +func (conf *Config) Check(path string, fset *token.FileSet, files []*ast.File, info *Info) (*Package, error) { + pkg := NewPackage(path, "") + return pkg, NewChecker(conf, fset, pkg, info).Files(files) +} + +// AssertableTo reports whether a value of type V can be asserted to have type T. +func AssertableTo(V *Interface, T Type) bool { + m, _ := assertableTo(V, T) + return m == nil +} + +// AssignableTo reports whether a value of type V is assignable to a variable of type T. +func AssignableTo(V, T Type) bool { + x := operand{mode: value, typ: V} + return x.assignableTo(nil, T) // config not needed for non-constant x +} + +// ConvertibleTo reports whether a value of type V is convertible to a value of type T. +func ConvertibleTo(V, T Type) bool { + x := operand{mode: value, typ: V} + return x.convertibleTo(nil, T) // config not needed for non-constant x +} + +// Implements reports whether type V implements interface T. +func Implements(V Type, T *Interface) bool { + f, _ := MissingMethod(V, T, true) + return f == nil +} diff --git a/vendor/golang.org/x/tools/go/types/assignments.go b/vendor/golang.org/x/tools/go/types/assignments.go new file mode 100644 index 0000000..93b842e --- /dev/null +++ b/vendor/golang.org/x/tools/go/types/assignments.go @@ -0,0 +1,328 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// This file implements initialization and assignment checks. + +package types + +import ( + "go/ast" + "go/token" +) + +// assignment reports whether x can be assigned to a variable of type T, +// if necessary by attempting to convert untyped values to the appropriate +// type. If x.mode == invalid upon return, then assignment has already +// issued an error message and the caller doesn't have to report another. +// Use T == nil to indicate assignment to an untyped blank identifier. +// +// TODO(gri) Should find a better way to handle in-band errors. +// +func (check *Checker) assignment(x *operand, T Type) bool { + switch x.mode { + case invalid: + return true // error reported before + case constant, variable, mapindex, value, commaok: + // ok + default: + unreachable() + } + + // x must be a single value + // (tuple types are never named - no need for underlying type) + if t, _ := x.typ.(*Tuple); t != nil { + assert(t.Len() > 1) + check.errorf(x.pos(), "%d-valued expression %s used as single value", t.Len(), x) + x.mode = invalid + return false + } + + if isUntyped(x.typ) { + target := T + // spec: "If an untyped constant is assigned to a variable of interface + // type or the blank identifier, the constant is first converted to type + // bool, rune, int, float64, complex128 or string respectively, depending + // on whether the value is a boolean, rune, integer, floating-point, complex, + // or string constant." + if T == nil || IsInterface(T) { + if T == nil && x.typ == Typ[UntypedNil] { + check.errorf(x.pos(), "use of untyped nil") + x.mode = invalid + return false + } + target = defaultType(x.typ) + } + check.convertUntyped(x, target) + if x.mode == invalid { + return false + } + } + + // spec: "If a left-hand side is the blank identifier, any typed or + // non-constant value except for the predeclared identifier nil may + // be assigned to it." + return T == nil || x.assignableTo(check.conf, T) +} + +func (check *Checker) initConst(lhs *Const, x *operand) { + if x.mode == invalid || x.typ == Typ[Invalid] || lhs.typ == Typ[Invalid] { + if lhs.typ == nil { + lhs.typ = Typ[Invalid] + } + return + } + + // rhs must be a constant + if x.mode != constant { + check.errorf(x.pos(), "%s is not constant", x) + if lhs.typ == nil { + lhs.typ = Typ[Invalid] + } + return + } + assert(isConstType(x.typ)) + + // If the lhs doesn't have a type yet, use the type of x. + if lhs.typ == nil { + lhs.typ = x.typ + } + + if !check.assignment(x, lhs.typ) { + if x.mode != invalid { + check.errorf(x.pos(), "cannot define constant %s (type %s) as %s", lhs.Name(), lhs.typ, x) + } + return + } + + lhs.val = x.val +} + +// If result is set, lhs is a function result parameter and x is a return result. +func (check *Checker) initVar(lhs *Var, x *operand, result bool) Type { + if x.mode == invalid || x.typ == Typ[Invalid] || lhs.typ == Typ[Invalid] { + if lhs.typ == nil { + lhs.typ = Typ[Invalid] + } + return nil + } + + // If the lhs doesn't have a type yet, use the type of x. + if lhs.typ == nil { + typ := x.typ + if isUntyped(typ) { + // convert untyped types to default types + if typ == Typ[UntypedNil] { + check.errorf(x.pos(), "use of untyped nil") + lhs.typ = Typ[Invalid] + return nil + } + typ = defaultType(typ) + } + lhs.typ = typ + } + + if !check.assignment(x, lhs.typ) { + if x.mode != invalid { + if result { + // don't refer to lhs.name because it may be an anonymous result parameter + check.errorf(x.pos(), "cannot return %s as value of type %s", x, lhs.typ) + } else { + check.errorf(x.pos(), "cannot initialize %s with %s", lhs, x) + } + } + return nil + } + + return x.typ +} + +func (check *Checker) assignVar(lhs ast.Expr, x *operand) Type { + if x.mode == invalid || x.typ == Typ[Invalid] { + return nil + } + + // Determine if the lhs is a (possibly parenthesized) identifier. + ident, _ := unparen(lhs).(*ast.Ident) + + // Don't evaluate lhs if it is the blank identifier. + if ident != nil && ident.Name == "_" { + check.recordDef(ident, nil) + if !check.assignment(x, nil) { + assert(x.mode == invalid) + x.typ = nil + } + return x.typ + } + + // If the lhs is an identifier denoting a variable v, this assignment + // is not a 'use' of v. Remember current value of v.used and restore + // after evaluating the lhs via check.expr. + var v *Var + var v_used bool + if ident != nil { + if _, obj := check.scope.LookupParent(ident.Name, token.NoPos); obj != nil { + v, _ = obj.(*Var) + if v != nil { + v_used = v.used + } + } + } + + var z operand + check.expr(&z, lhs) + if v != nil { + v.used = v_used // restore v.used + } + + if z.mode == invalid || z.typ == Typ[Invalid] { + return nil + } + + // spec: "Each left-hand side operand must be addressable, a map index + // expression, or the blank identifier. Operands may be parenthesized." + switch z.mode { + case invalid: + return nil + case variable, mapindex: + // ok + default: + check.errorf(z.pos(), "cannot assign to %s", &z) + return nil + } + + if !check.assignment(x, z.typ) { + if x.mode != invalid { + check.errorf(x.pos(), "cannot assign %s to %s", x, &z) + } + return nil + } + + return x.typ +} + +// If returnPos is valid, initVars is called to type-check the assignment of +// return expressions, and returnPos is the position of the return statement. +func (check *Checker) initVars(lhs []*Var, rhs []ast.Expr, returnPos token.Pos) { + l := len(lhs) + get, r, commaOk := unpack(func(x *operand, i int) { check.expr(x, rhs[i]) }, len(rhs), l == 2 && !returnPos.IsValid()) + if get == nil || l != r { + // invalidate lhs and use rhs + for _, obj := range lhs { + if obj.typ == nil { + obj.typ = Typ[Invalid] + } + } + if get == nil { + return // error reported by unpack + } + check.useGetter(get, r) + if returnPos.IsValid() { + check.errorf(returnPos, "wrong number of return values (want %d, got %d)", l, r) + return + } + check.errorf(rhs[0].Pos(), "assignment count mismatch (%d vs %d)", l, r) + return + } + + var x operand + if commaOk { + var a [2]Type + for i := range a { + get(&x, i) + a[i] = check.initVar(lhs[i], &x, returnPos.IsValid()) + } + check.recordCommaOkTypes(rhs[0], a) + return + } + + for i, lhs := range lhs { + get(&x, i) + check.initVar(lhs, &x, returnPos.IsValid()) + } +} + +func (check *Checker) assignVars(lhs, rhs []ast.Expr) { + l := len(lhs) + get, r, commaOk := unpack(func(x *operand, i int) { check.expr(x, rhs[i]) }, len(rhs), l == 2) + if get == nil { + return // error reported by unpack + } + if l != r { + check.useGetter(get, r) + check.errorf(rhs[0].Pos(), "assignment count mismatch (%d vs %d)", l, r) + return + } + + var x operand + if commaOk { + var a [2]Type + for i := range a { + get(&x, i) + a[i] = check.assignVar(lhs[i], &x) + } + check.recordCommaOkTypes(rhs[0], a) + return + } + + for i, lhs := range lhs { + get(&x, i) + check.assignVar(lhs, &x) + } +} + +func (check *Checker) shortVarDecl(pos token.Pos, lhs, rhs []ast.Expr) { + scope := check.scope + + // collect lhs variables + var newVars []*Var + var lhsVars = make([]*Var, len(lhs)) + for i, lhs := range lhs { + var obj *Var + if ident, _ := lhs.(*ast.Ident); ident != nil { + // Use the correct obj if the ident is redeclared. The + // variable's scope starts after the declaration; so we + // must use Scope.Lookup here and call Scope.Insert + // (via check.declare) later. + name := ident.Name + if alt := scope.Lookup(name); alt != nil { + // redeclared object must be a variable + if alt, _ := alt.(*Var); alt != nil { + obj = alt + } else { + check.errorf(lhs.Pos(), "cannot assign to %s", lhs) + } + check.recordUse(ident, alt) + } else { + // declare new variable, possibly a blank (_) variable + obj = NewVar(ident.Pos(), check.pkg, name, nil) + if name != "_" { + newVars = append(newVars, obj) + } + check.recordDef(ident, obj) + } + } else { + check.errorf(lhs.Pos(), "cannot declare %s", lhs) + } + if obj == nil { + obj = NewVar(lhs.Pos(), check.pkg, "_", nil) // dummy variable + } + lhsVars[i] = obj + } + + check.initVars(lhsVars, rhs, token.NoPos) + + // declare new variables + if len(newVars) > 0 { + // spec: "The scope of a constant or variable identifier declared inside + // a function begins at the end of the ConstSpec or VarSpec (ShortVarDecl + // for short variable declarations) and ends at the end of the innermost + // containing block." + scopePos := rhs[len(rhs)-1].End() + for _, obj := range newVars { + check.declare(scope, nil, obj, scopePos) // recordObject already called + } + } else { + check.softErrorf(pos, "no new variables on left side of :=") + } +} diff --git a/vendor/golang.org/x/tools/go/types/builtins.go b/vendor/golang.org/x/tools/go/types/builtins.go new file mode 100644 index 0000000..f45f930 --- /dev/null +++ b/vendor/golang.org/x/tools/go/types/builtins.go @@ -0,0 +1,628 @@ +// Copyright 2012 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// This file implements typechecking of builtin function calls. + +package types + +import ( + "go/ast" + "go/token" + + "golang.org/x/tools/go/exact" +) + +// builtin type-checks a call to the built-in specified by id and +// returns true if the call is valid, with *x holding the result; +// but x.expr is not set. If the call is invalid, the result is +// false, and *x is undefined. +// +func (check *Checker) builtin(x *operand, call *ast.CallExpr, id builtinId) (_ bool) { + // append is the only built-in that permits the use of ... for the last argument + bin := predeclaredFuncs[id] + if call.Ellipsis.IsValid() && id != _Append { + check.invalidOp(call.Ellipsis, "invalid use of ... with built-in %s", bin.name) + check.use(call.Args...) + return + } + + // For len(x) and cap(x) we need to know if x contains any function calls or + // receive operations. Save/restore current setting and set hasCallOrRecv to + // false for the evaluation of x so that we can check it afterwards. + // Note: We must do this _before_ calling unpack because unpack evaluates the + // first argument before we even call arg(x, 0)! + if id == _Len || id == _Cap { + defer func(b bool) { + check.hasCallOrRecv = b + }(check.hasCallOrRecv) + check.hasCallOrRecv = false + } + + // determine actual arguments + var arg getter + nargs := len(call.Args) + switch id { + default: + // make argument getter + arg, nargs, _ = unpack(func(x *operand, i int) { check.expr(x, call.Args[i]) }, nargs, false) + if arg == nil { + return + } + // evaluate first argument, if present + if nargs > 0 { + arg(x, 0) + if x.mode == invalid { + return + } + } + case _Make, _New, _Offsetof, _Trace: + // arguments require special handling + } + + // check argument count + { + msg := "" + if nargs < bin.nargs { + msg = "not enough" + } else if !bin.variadic && nargs > bin.nargs { + msg = "too many" + } + if msg != "" { + check.invalidOp(call.Rparen, "%s arguments for %s (expected %d, found %d)", msg, call, bin.nargs, nargs) + return + } + } + + switch id { + case _Append: + // append(s S, x ...T) S, where T is the element type of S + // spec: "The variadic function append appends zero or more values x to s of type + // S, which must be a slice type, and returns the resulting slice, also of type S. + // The values x are passed to a parameter of type ...T where T is the element type + // of S and the respective parameter passing rules apply." + S := x.typ + var T Type + if s, _ := S.Underlying().(*Slice); s != nil { + T = s.elem + } else { + check.invalidArg(x.pos(), "%s is not a slice", x) + return + } + + // remember arguments that have been evaluated already + alist := []operand{*x} + + // spec: "As a special case, append also accepts a first argument assignable + // to type []byte with a second argument of string type followed by ... . + // This form appends the bytes of the string. + if nargs == 2 && call.Ellipsis.IsValid() && x.assignableTo(check.conf, NewSlice(universeByte)) { + arg(x, 1) + if x.mode == invalid { + return + } + if isString(x.typ) { + if check.Types != nil { + sig := makeSig(S, S, x.typ) + sig.variadic = true + check.recordBuiltinType(call.Fun, sig) + } + x.mode = value + x.typ = S + break + } + alist = append(alist, *x) + // fallthrough + } + + // check general case by creating custom signature + sig := makeSig(S, S, NewSlice(T)) // []T required for variadic signature + sig.variadic = true + check.arguments(x, call, sig, func(x *operand, i int) { + // only evaluate arguments that have not been evaluated before + if i < len(alist) { + *x = alist[i] + return + } + arg(x, i) + }, nargs) + // ok to continue even if check.arguments reported errors + + x.mode = value + x.typ = S + if check.Types != nil { + check.recordBuiltinType(call.Fun, sig) + } + + case _Cap, _Len: + // cap(x) + // len(x) + mode := invalid + var typ Type + var val exact.Value + switch typ = implicitArrayDeref(x.typ.Underlying()); t := typ.(type) { + case *Basic: + if isString(t) && id == _Len { + if x.mode == constant { + mode = constant + val = exact.MakeInt64(int64(len(exact.StringVal(x.val)))) + } else { + mode = value + } + } + + case *Array: + mode = value + // spec: "The expressions len(s) and cap(s) are constants + // if the type of s is an array or pointer to an array and + // the expression s does not contain channel receives or + // function calls; in this case s is not evaluated." + if !check.hasCallOrRecv { + mode = constant + val = exact.MakeInt64(t.len) + } + + case *Slice, *Chan: + mode = value + + case *Map: + if id == _Len { + mode = value + } + } + + if mode == invalid { + check.invalidArg(x.pos(), "%s for %s", x, bin.name) + return + } + + x.mode = mode + x.typ = Typ[Int] + x.val = val + if check.Types != nil && mode != constant { + check.recordBuiltinType(call.Fun, makeSig(x.typ, typ)) + } + + case _Close: + // close(c) + c, _ := x.typ.Underlying().(*Chan) + if c == nil { + check.invalidArg(x.pos(), "%s is not a channel", x) + return + } + if c.dir == RecvOnly { + check.invalidArg(x.pos(), "%s must not be a receive-only channel", x) + return + } + + x.mode = novalue + if check.Types != nil { + check.recordBuiltinType(call.Fun, makeSig(nil, c)) + } + + case _Complex: + // complex(x, y realT) complexT + if !check.complexArg(x) { + return + } + + var y operand + arg(&y, 1) + if y.mode == invalid { + return + } + if !check.complexArg(&y) { + return + } + + check.convertUntyped(x, y.typ) + if x.mode == invalid { + return + } + check.convertUntyped(&y, x.typ) + if y.mode == invalid { + return + } + + if !Identical(x.typ, y.typ) { + check.invalidArg(x.pos(), "mismatched types %s and %s", x.typ, y.typ) + return + } + + if x.mode == constant && y.mode == constant { + x.val = exact.BinaryOp(x.val, token.ADD, exact.MakeImag(y.val)) + } else { + x.mode = value + } + + realT := x.typ + complexT := Typ[Invalid] + switch realT.Underlying().(*Basic).kind { + case Float32: + complexT = Typ[Complex64] + case Float64: + complexT = Typ[Complex128] + case UntypedInt, UntypedRune, UntypedFloat: + if x.mode == constant { + realT = defaultType(realT).(*Basic) + complexT = Typ[UntypedComplex] + } else { + // untyped but not constant; probably because one + // operand is a non-constant shift of untyped lhs + realT = Typ[Float64] + complexT = Typ[Complex128] + } + default: + check.invalidArg(x.pos(), "float32 or float64 arguments expected") + return + } + + x.typ = complexT + if check.Types != nil && x.mode != constant { + check.recordBuiltinType(call.Fun, makeSig(complexT, realT, realT)) + } + + if x.mode != constant { + // The arguments have now their final types, which at run- + // time will be materialized. Update the expression trees. + // If the current types are untyped, the materialized type + // is the respective default type. + // (If the result is constant, the arguments are never + // materialized and there is nothing to do.) + check.updateExprType(x.expr, realT, true) + check.updateExprType(y.expr, realT, true) + } + + case _Copy: + // copy(x, y []T) int + var dst Type + if t, _ := x.typ.Underlying().(*Slice); t != nil { + dst = t.elem + } + + var y operand + arg(&y, 1) + if y.mode == invalid { + return + } + var src Type + switch t := y.typ.Underlying().(type) { + case *Basic: + if isString(y.typ) { + src = universeByte + } + case *Slice: + src = t.elem + } + + if dst == nil || src == nil { + check.invalidArg(x.pos(), "copy expects slice arguments; found %s and %s", x, &y) + return + } + + if !Identical(dst, src) { + check.invalidArg(x.pos(), "arguments to copy %s and %s have different element types %s and %s", x, &y, dst, src) + return + } + + if check.Types != nil { + check.recordBuiltinType(call.Fun, makeSig(Typ[Int], x.typ, y.typ)) + } + x.mode = value + x.typ = Typ[Int] + + case _Delete: + // delete(m, k) + m, _ := x.typ.Underlying().(*Map) + if m == nil { + check.invalidArg(x.pos(), "%s is not a map", x) + return + } + arg(x, 1) // k + if x.mode == invalid { + return + } + + if !x.assignableTo(check.conf, m.key) { + check.invalidArg(x.pos(), "%s is not assignable to %s", x, m.key) + return + } + + x.mode = novalue + if check.Types != nil { + check.recordBuiltinType(call.Fun, makeSig(nil, m, m.key)) + } + + case _Imag, _Real: + // imag(complexT) realT + // real(complexT) realT + if !isComplex(x.typ) { + check.invalidArg(x.pos(), "%s must be a complex number", x) + return + } + if x.mode == constant { + if id == _Real { + x.val = exact.Real(x.val) + } else { + x.val = exact.Imag(x.val) + } + } else { + x.mode = value + } + var k BasicKind + switch x.typ.Underlying().(*Basic).kind { + case Complex64: + k = Float32 + case Complex128: + k = Float64 + case UntypedComplex: + k = UntypedFloat + default: + unreachable() + } + + if check.Types != nil && x.mode != constant { + check.recordBuiltinType(call.Fun, makeSig(Typ[k], x.typ)) + } + x.typ = Typ[k] + + case _Make: + // make(T, n) + // make(T, n, m) + // (no argument evaluated yet) + arg0 := call.Args[0] + T := check.typ(arg0) + if T == Typ[Invalid] { + return + } + + var min int // minimum number of arguments + switch T.Underlying().(type) { + case *Slice: + min = 2 + case *Map, *Chan: + min = 1 + default: + check.invalidArg(arg0.Pos(), "cannot make %s; type must be slice, map, or channel", arg0) + return + } + if nargs < min || min+1 < nargs { + check.errorf(call.Pos(), "%s expects %d or %d arguments; found %d", call, min, min+1, nargs) + return + } + var sizes []int64 // constant integer arguments, if any + for _, arg := range call.Args[1:] { + if s, ok := check.index(arg, -1); ok && s >= 0 { + sizes = append(sizes, s) + } + } + if len(sizes) == 2 && sizes[0] > sizes[1] { + check.invalidArg(call.Args[1].Pos(), "length and capacity swapped") + // safe to continue + } + x.mode = value + x.typ = T + if check.Types != nil { + params := [...]Type{T, Typ[Int], Typ[Int]} + check.recordBuiltinType(call.Fun, makeSig(x.typ, params[:1+len(sizes)]...)) + } + + case _New: + // new(T) + // (no argument evaluated yet) + T := check.typ(call.Args[0]) + if T == Typ[Invalid] { + return + } + + x.mode = value + x.typ = &Pointer{base: T} + if check.Types != nil { + check.recordBuiltinType(call.Fun, makeSig(x.typ, T)) + } + + case _Panic: + // panic(x) + T := new(Interface) + if !check.assignment(x, T) { + assert(x.mode == invalid) + return + } + + x.mode = novalue + if check.Types != nil { + check.recordBuiltinType(call.Fun, makeSig(nil, T)) + } + + case _Print, _Println: + // print(x, y, ...) + // println(x, y, ...) + var params []Type + if nargs > 0 { + params = make([]Type, nargs) + for i := 0; i < nargs; i++ { + if i > 0 { + arg(x, i) // first argument already evaluated + } + if !check.assignment(x, nil) { + assert(x.mode == invalid) + return + } + params[i] = x.typ + } + } + + x.mode = novalue + if check.Types != nil { + check.recordBuiltinType(call.Fun, makeSig(nil, params...)) + } + + case _Recover: + // recover() interface{} + x.mode = value + x.typ = new(Interface) + if check.Types != nil { + check.recordBuiltinType(call.Fun, makeSig(x.typ)) + } + + case _Alignof: + // unsafe.Alignof(x T) uintptr + if !check.assignment(x, nil) { + assert(x.mode == invalid) + return + } + + x.mode = constant + x.val = exact.MakeInt64(check.conf.alignof(x.typ)) + x.typ = Typ[Uintptr] + // result is constant - no need to record signature + + case _Offsetof: + // unsafe.Offsetof(x T) uintptr, where x must be a selector + // (no argument evaluated yet) + arg0 := call.Args[0] + selx, _ := unparen(arg0).(*ast.SelectorExpr) + if selx == nil { + check.invalidArg(arg0.Pos(), "%s is not a selector expression", arg0) + check.use(arg0) + return + } + + check.expr(x, selx.X) + if x.mode == invalid { + return + } + + base := derefStructPtr(x.typ) + sel := selx.Sel.Name + obj, index, indirect := LookupFieldOrMethod(base, false, check.pkg, sel) + switch obj.(type) { + case nil: + check.invalidArg(x.pos(), "%s has no single field %s", base, sel) + return + case *Func: + // TODO(gri) Using derefStructPtr may result in methods being found + // that don't actually exist. An error either way, but the error + // message is confusing. See: http://play.golang.org/p/al75v23kUy , + // but go/types reports: "invalid argument: x.m is a method value". + check.invalidArg(arg0.Pos(), "%s is a method value", arg0) + return + } + if indirect { + check.invalidArg(x.pos(), "field %s is embedded via a pointer in %s", sel, base) + return + } + + // TODO(gri) Should we pass x.typ instead of base (and indirect report if derefStructPtr indirected)? + check.recordSelection(selx, FieldVal, base, obj, index, false) + + offs := check.conf.offsetof(base, index) + x.mode = constant + x.val = exact.MakeInt64(offs) + x.typ = Typ[Uintptr] + // result is constant - no need to record signature + + case _Sizeof: + // unsafe.Sizeof(x T) uintptr + if !check.assignment(x, nil) { + assert(x.mode == invalid) + return + } + + x.mode = constant + x.val = exact.MakeInt64(check.conf.sizeof(x.typ)) + x.typ = Typ[Uintptr] + // result is constant - no need to record signature + + case _Assert: + // assert(pred) causes a typechecker error if pred is false. + // The result of assert is the value of pred if there is no error. + // Note: assert is only available in self-test mode. + if x.mode != constant || !isBoolean(x.typ) { + check.invalidArg(x.pos(), "%s is not a boolean constant", x) + return + } + if x.val.Kind() != exact.Bool { + check.errorf(x.pos(), "internal error: value of %s should be a boolean constant", x) + return + } + if !exact.BoolVal(x.val) { + check.errorf(call.Pos(), "%s failed", call) + // compile-time assertion failure - safe to continue + } + // result is constant - no need to record signature + + case _Trace: + // trace(x, y, z, ...) dumps the positions, expressions, and + // values of its arguments. The result of trace is the value + // of the first argument. + // Note: trace is only available in self-test mode. + // (no argument evaluated yet) + if nargs == 0 { + check.dump("%s: trace() without arguments", call.Pos()) + x.mode = novalue + break + } + var t operand + x1 := x + for _, arg := range call.Args { + check.rawExpr(x1, arg, nil) // permit trace for types, e.g.: new(trace(T)) + check.dump("%s: %s", x1.pos(), x1) + x1 = &t // use incoming x only for first argument + } + // trace is only available in test mode - no need to record signature + + default: + unreachable() + } + + return true +} + +// makeSig makes a signature for the given argument and result types. +// Default types are used for untyped arguments, and res may be nil. +func makeSig(res Type, args ...Type) *Signature { + list := make([]*Var, len(args)) + for i, param := range args { + list[i] = NewVar(token.NoPos, nil, "", defaultType(param)) + } + params := NewTuple(list...) + var result *Tuple + if res != nil { + assert(!isUntyped(res)) + result = NewTuple(NewVar(token.NoPos, nil, "", res)) + } + return &Signature{params: params, results: result} +} + +// implicitArrayDeref returns A if typ is of the form *A and A is an array; +// otherwise it returns typ. +// +func implicitArrayDeref(typ Type) Type { + if p, ok := typ.(*Pointer); ok { + if a, ok := p.base.Underlying().(*Array); ok { + return a + } + } + return typ +} + +// unparen returns e with any enclosing parentheses stripped. +func unparen(e ast.Expr) ast.Expr { + for { + p, ok := e.(*ast.ParenExpr) + if !ok { + return e + } + e = p.X + } +} + +func (check *Checker) complexArg(x *operand) bool { + t, _ := x.typ.Underlying().(*Basic) + if t != nil && (t.info&IsFloat != 0 || t.kind == UntypedInt || t.kind == UntypedRune) { + return true + } + check.invalidArg(x.pos(), "%s must be a float32, float64, or an untyped non-complex numeric constant", x) + return false +} diff --git a/vendor/golang.org/x/tools/go/types/call.go b/vendor/golang.org/x/tools/go/types/call.go new file mode 100644 index 0000000..1e94212 --- /dev/null +++ b/vendor/golang.org/x/tools/go/types/call.go @@ -0,0 +1,441 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// This file implements typechecking of call and selector expressions. + +package types + +import ( + "go/ast" + "go/token" +) + +func (check *Checker) call(x *operand, e *ast.CallExpr) exprKind { + check.exprOrType(x, e.Fun) + + switch x.mode { + case invalid: + check.use(e.Args...) + x.mode = invalid + x.expr = e + return statement + + case typexpr: + // conversion + T := x.typ + x.mode = invalid + switch n := len(e.Args); n { + case 0: + check.errorf(e.Rparen, "missing argument in conversion to %s", T) + case 1: + check.expr(x, e.Args[0]) + if x.mode != invalid { + check.conversion(x, T) + } + default: + check.errorf(e.Args[n-1].Pos(), "too many arguments in conversion to %s", T) + } + x.expr = e + return conversion + + case builtin: + id := x.id + if !check.builtin(x, e, id) { + x.mode = invalid + } + x.expr = e + // a non-constant result implies a function call + if x.mode != invalid && x.mode != constant { + check.hasCallOrRecv = true + } + return predeclaredFuncs[id].kind + + default: + // function/method call + sig, _ := x.typ.Underlying().(*Signature) + if sig == nil { + check.invalidOp(x.pos(), "cannot call non-function %s", x) + x.mode = invalid + x.expr = e + return statement + } + + arg, n, _ := unpack(func(x *operand, i int) { check.expr(x, e.Args[i]) }, len(e.Args), false) + if arg == nil { + x.mode = invalid + x.expr = e + return statement + } + + check.arguments(x, e, sig, arg, n) + + // determine result + switch sig.results.Len() { + case 0: + x.mode = novalue + case 1: + x.mode = value + x.typ = sig.results.vars[0].typ // unpack tuple + default: + x.mode = value + x.typ = sig.results + } + x.expr = e + check.hasCallOrRecv = true + + return statement + } +} + +// use type-checks each argument. +// Useful to make sure expressions are evaluated +// (and variables are "used") in the presence of other errors. +func (check *Checker) use(arg ...ast.Expr) { + var x operand + for _, e := range arg { + check.rawExpr(&x, e, nil) + } +} + +// useGetter is like use, but takes a getter instead of a list of expressions. +// It should be called instead of use if a getter is present to avoid repeated +// evaluation of the first argument (since the getter was likely obtained via +// unpack, which may have evaluated the first argument already). +func (check *Checker) useGetter(get getter, n int) { + var x operand + for i := 0; i < n; i++ { + get(&x, i) + } +} + +// A getter sets x as the i'th operand, where 0 <= i < n and n is the total +// number of operands (context-specific, and maintained elsewhere). A getter +// type-checks the i'th operand; the details of the actual check are getter- +// specific. +type getter func(x *operand, i int) + +// unpack takes a getter get and a number of operands n. If n == 1, unpack +// calls the incoming getter for the first operand. If that operand is +// invalid, unpack returns (nil, 0, false). Otherwise, if that operand is a +// function call, or a comma-ok expression and allowCommaOk is set, the result +// is a new getter and operand count providing access to the function results, +// or comma-ok values, respectively. The third result value reports if it +// is indeed the comma-ok case. In all other cases, the incoming getter and +// operand count are returned unchanged, and the third result value is false. +// +// In other words, if there's exactly one operand that - after type-checking +// by calling get - stands for multiple operands, the resulting getter provides +// access to those operands instead. +// +// If the returned getter is called at most once for a given operand index i +// (including i == 0), that operand is guaranteed to cause only one call of +// the incoming getter with that i. +// +func unpack(get getter, n int, allowCommaOk bool) (getter, int, bool) { + if n == 1 { + // possibly result of an n-valued function call or comma,ok value + var x0 operand + get(&x0, 0) + if x0.mode == invalid { + return nil, 0, false + } + + if t, ok := x0.typ.(*Tuple); ok { + // result of an n-valued function call + return func(x *operand, i int) { + x.mode = value + x.expr = x0.expr + x.typ = t.At(i).typ + }, t.Len(), false + } + + if x0.mode == mapindex || x0.mode == commaok { + // comma-ok value + if allowCommaOk { + a := [2]Type{x0.typ, Typ[UntypedBool]} + return func(x *operand, i int) { + x.mode = value + x.expr = x0.expr + x.typ = a[i] + }, 2, true + } + x0.mode = value + } + + // single value + return func(x *operand, i int) { + if i != 0 { + unreachable() + } + *x = x0 + }, 1, false + } + + // zero or multiple values + return get, n, false +} + +// arguments checks argument passing for the call with the given signature. +// The arg function provides the operand for the i'th argument. +func (check *Checker) arguments(x *operand, call *ast.CallExpr, sig *Signature, arg getter, n int) { + if call.Ellipsis.IsValid() { + // last argument is of the form x... + if len(call.Args) == 1 && n > 1 { + // f()... is not permitted if f() is multi-valued + check.errorf(call.Ellipsis, "cannot use ... with %d-valued expression %s", n, call.Args[0]) + check.useGetter(arg, n) + return + } + if !sig.variadic { + check.errorf(call.Ellipsis, "cannot use ... in call to non-variadic %s", call.Fun) + check.useGetter(arg, n) + return + } + } + + // evaluate arguments + for i := 0; i < n; i++ { + arg(x, i) + if x.mode != invalid { + var ellipsis token.Pos + if i == n-1 && call.Ellipsis.IsValid() { + ellipsis = call.Ellipsis + } + check.argument(sig, i, x, ellipsis) + } + } + + // check argument count + if sig.variadic { + // a variadic function accepts an "empty" + // last argument: count one extra + n++ + } + if n < sig.params.Len() { + check.errorf(call.Rparen, "too few arguments in call to %s", call.Fun) + // ok to continue + } +} + +// argument checks passing of argument x to the i'th parameter of the given signature. +// If ellipsis is valid, the argument is followed by ... at that position in the call. +func (check *Checker) argument(sig *Signature, i int, x *operand, ellipsis token.Pos) { + n := sig.params.Len() + + // determine parameter type + var typ Type + switch { + case i < n: + typ = sig.params.vars[i].typ + case sig.variadic: + typ = sig.params.vars[n-1].typ + if debug { + if _, ok := typ.(*Slice); !ok { + check.dump("%s: expected unnamed slice type, got %s", sig.params.vars[n-1].Pos(), typ) + } + } + default: + check.errorf(x.pos(), "too many arguments") + return + } + + if ellipsis.IsValid() { + // argument is of the form x... + if i != n-1 { + check.errorf(ellipsis, "can only use ... with matching parameter") + return + } + switch t := x.typ.Underlying().(type) { + case *Slice: + // ok + case *Tuple: + check.errorf(ellipsis, "cannot use ... with %d-valued expression %s", t.Len(), x) + return + default: + check.errorf(x.pos(), "cannot use %s as parameter of type %s", x, typ) + return + } + } else if sig.variadic && i >= n-1 { + // use the variadic parameter slice's element type + typ = typ.(*Slice).elem + } + + if !check.assignment(x, typ) && x.mode != invalid { + check.errorf(x.pos(), "cannot pass argument %s to parameter of type %s", x, typ) + } +} + +func (check *Checker) selector(x *operand, e *ast.SelectorExpr) { + // these must be declared before the "goto Error" statements + var ( + obj Object + index []int + indirect bool + ) + + sel := e.Sel.Name + // If the identifier refers to a package, handle everything here + // so we don't need a "package" mode for operands: package names + // can only appear in qualified identifiers which are mapped to + // selector expressions. + if ident, ok := e.X.(*ast.Ident); ok { + _, obj := check.scope.LookupParent(ident.Name, check.pos) + if pkg, _ := obj.(*PkgName); pkg != nil { + assert(pkg.pkg == check.pkg) + check.recordUse(ident, pkg) + pkg.used = true + exp := pkg.imported.scope.Lookup(sel) + if exp == nil { + if !pkg.imported.fake { + check.errorf(e.Pos(), "%s not declared by package %s", sel, ident) + } + goto Error + } + if !exp.Exported() { + check.errorf(e.Pos(), "%s not exported by package %s", sel, ident) + // ok to continue + } + check.recordUse(e.Sel, exp) + // Simplified version of the code for *ast.Idents: + // - imported objects are always fully initialized + switch exp := exp.(type) { + case *Const: + assert(exp.Val() != nil) + x.mode = constant + x.typ = exp.typ + x.val = exp.val + case *TypeName: + x.mode = typexpr + x.typ = exp.typ + case *Var: + x.mode = variable + x.typ = exp.typ + case *Func: + x.mode = value + x.typ = exp.typ + case *Builtin: + x.mode = builtin + x.typ = exp.typ + x.id = exp.id + default: + unreachable() + } + x.expr = e + return + } + } + + check.exprOrType(x, e.X) + if x.mode == invalid { + goto Error + } + + obj, index, indirect = LookupFieldOrMethod(x.typ, x.mode == variable, check.pkg, sel) + if obj == nil { + switch { + case index != nil: + // TODO(gri) should provide actual type where the conflict happens + check.invalidOp(e.Pos(), "ambiguous selector %s", sel) + case indirect: + check.invalidOp(e.Pos(), "%s is not in method set of %s", sel, x.typ) + default: + check.invalidOp(e.Pos(), "%s has no field or method %s", x, sel) + } + goto Error + } + + if x.mode == typexpr { + // method expression + m, _ := obj.(*Func) + if m == nil { + check.invalidOp(e.Pos(), "%s has no method %s", x, sel) + goto Error + } + + check.recordSelection(e, MethodExpr, x.typ, m, index, indirect) + + // the receiver type becomes the type of the first function + // argument of the method expression's function type + var params []*Var + sig := m.typ.(*Signature) + if sig.params != nil { + params = sig.params.vars + } + x.mode = value + x.typ = &Signature{ + params: NewTuple(append([]*Var{NewVar(token.NoPos, check.pkg, "", x.typ)}, params...)...), + results: sig.results, + variadic: sig.variadic, + } + + check.addDeclDep(m) + + } else { + // regular selector + switch obj := obj.(type) { + case *Var: + check.recordSelection(e, FieldVal, x.typ, obj, index, indirect) + if x.mode == variable || indirect { + x.mode = variable + } else { + x.mode = value + } + x.typ = obj.typ + + case *Func: + // TODO(gri) If we needed to take into account the receiver's + // addressability, should we report the type &(x.typ) instead? + check.recordSelection(e, MethodVal, x.typ, obj, index, indirect) + + if debug { + // Verify that LookupFieldOrMethod and MethodSet.Lookup agree. + typ := x.typ + if x.mode == variable { + // If typ is not an (unnamed) pointer or an interface, + // use *typ instead, because the method set of *typ + // includes the methods of typ. + // Variables are addressable, so we can always take their + // address. + if _, ok := typ.(*Pointer); !ok && !IsInterface(typ) { + typ = &Pointer{base: typ} + } + } + // If we created a synthetic pointer type above, we will throw + // away the method set computed here after use. + // TODO(gri) Method set computation should probably always compute + // both, the value and the pointer receiver method set and represent + // them in a single structure. + // TODO(gri) Consider also using a method set cache for the lifetime + // of checker once we rely on MethodSet lookup instead of individual + // lookup. + mset := NewMethodSet(typ) + if m := mset.Lookup(check.pkg, sel); m == nil || m.obj != obj { + check.dump("%s: (%s).%v -> %s", e.Pos(), typ, obj.name, m) + check.dump("%s\n", mset) + panic("method sets and lookup don't agree") + } + } + + x.mode = value + + // remove receiver + sig := *obj.typ.(*Signature) + sig.recv = nil + x.typ = &sig + + check.addDeclDep(obj) + + default: + unreachable() + } + } + + // everything went well + x.expr = e + return + +Error: + x.mode = invalid + x.expr = e +} diff --git a/vendor/golang.org/x/tools/go/types/check.go b/vendor/golang.org/x/tools/go/types/check.go new file mode 100644 index 0000000..964d2bd --- /dev/null +++ b/vendor/golang.org/x/tools/go/types/check.go @@ -0,0 +1,364 @@ +// Copyright 2011 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// This file implements the Check function, which drives type-checking. + +package types + +import ( + "go/ast" + "go/token" + + "golang.org/x/tools/go/exact" +) + +// debugging/development support +const ( + debug = false // leave on during development + trace = false // turn on for detailed type resolution traces +) + +// If Strict is set, the type-checker enforces additional +// rules not specified by the Go 1 spec, but which will +// catch guaranteed run-time errors if the respective +// code is executed. In other words, programs passing in +// Strict mode are Go 1 compliant, but not all Go 1 programs +// will pass in Strict mode. The additional rules are: +// +// - A type assertion x.(T) where T is an interface type +// is invalid if any (statically known) method that exists +// for both x and T have different signatures. +// +const strict = false + +// exprInfo stores information about an untyped expression. +type exprInfo struct { + isLhs bool // expression is lhs operand of a shift with delayed type-check + mode operandMode + typ *Basic + val exact.Value // constant value; or nil (if not a constant) +} + +// funcInfo stores the information required for type-checking a function. +type funcInfo struct { + name string // for debugging/tracing only + decl *declInfo // for cycle detection + sig *Signature + body *ast.BlockStmt +} + +// A context represents the context within which an object is type-checked. +type context struct { + decl *declInfo // package-level declaration whose init expression/function body is checked + scope *Scope // top-most scope for lookups + iota exact.Value // value of iota in a constant declaration; nil otherwise + sig *Signature // function signature if inside a function; nil otherwise + hasLabel bool // set if a function makes use of labels (only ~1% of functions); unused outside functions + hasCallOrRecv bool // set if an expression contains a function call or channel receive operation +} + +// A Checker maintains the state of the type checker. +// It must be created with NewChecker. +type Checker struct { + // package information + // (initialized by NewChecker, valid for the life-time of checker) + conf *Config + fset *token.FileSet + pkg *Package + *Info + objMap map[Object]*declInfo // maps package-level object to declaration info + + // information collected during type-checking of a set of package files + // (initialized by Files, valid only for the duration of check.Files; + // maps and lists are allocated on demand) + files []*ast.File // package files + unusedDotImports map[*Scope]map[*Package]token.Pos // positions of unused dot-imported packages for each file scope + + firstErr error // first error encountered + methods map[string][]*Func // maps type names to associated methods + untyped map[ast.Expr]exprInfo // map of expressions without final type + funcs []funcInfo // list of functions to type-check + delayed []func() // delayed checks requiring fully setup types + + // context within which the current object is type-checked + // (valid only for the duration of type-checking a specific object) + context + pos token.Pos // if valid, identifiers are looked up as if at position pos (used by Eval) + + // debugging + indent int // indentation for tracing +} + +// addUnusedImport adds the position of a dot-imported package +// pkg to the map of dot imports for the given file scope. +func (check *Checker) addUnusedDotImport(scope *Scope, pkg *Package, pos token.Pos) { + mm := check.unusedDotImports + if mm == nil { + mm = make(map[*Scope]map[*Package]token.Pos) + check.unusedDotImports = mm + } + m := mm[scope] + if m == nil { + m = make(map[*Package]token.Pos) + mm[scope] = m + } + m[pkg] = pos +} + +// addDeclDep adds the dependency edge (check.decl -> to) if check.decl exists +func (check *Checker) addDeclDep(to Object) { + from := check.decl + if from == nil { + return // not in a package-level init expression + } + if _, found := check.objMap[to]; !found { + return // to is not a package-level object + } + from.addDep(to) +} + +func (check *Checker) assocMethod(tname string, meth *Func) { + m := check.methods + if m == nil { + m = make(map[string][]*Func) + check.methods = m + } + m[tname] = append(m[tname], meth) +} + +func (check *Checker) rememberUntyped(e ast.Expr, lhs bool, mode operandMode, typ *Basic, val exact.Value) { + m := check.untyped + if m == nil { + m = make(map[ast.Expr]exprInfo) + check.untyped = m + } + m[e] = exprInfo{lhs, mode, typ, val} +} + +func (check *Checker) later(name string, decl *declInfo, sig *Signature, body *ast.BlockStmt) { + check.funcs = append(check.funcs, funcInfo{name, decl, sig, body}) +} + +func (check *Checker) delay(f func()) { + check.delayed = append(check.delayed, f) +} + +// NewChecker returns a new Checker instance for a given package. +// Package files may be added incrementally via checker.Files. +func NewChecker(conf *Config, fset *token.FileSet, pkg *Package, info *Info) *Checker { + // make sure we have a configuration + if conf == nil { + conf = new(Config) + } + + // make sure we have a package canonicalization map + if conf.Packages == nil { + conf.Packages = make(map[string]*Package) + } + + // make sure we have an info struct + if info == nil { + info = new(Info) + } + + return &Checker{ + conf: conf, + fset: fset, + pkg: pkg, + Info: info, + objMap: make(map[Object]*declInfo), + } +} + +// initFiles initializes the files-specific portion of checker. +// The provided files must all belong to the same package. +func (check *Checker) initFiles(files []*ast.File) { + // start with a clean slate (check.Files may be called multiple times) + check.files = nil + check.unusedDotImports = nil + + check.firstErr = nil + check.methods = nil + check.untyped = nil + check.funcs = nil + check.delayed = nil + + // determine package name and collect valid files + pkg := check.pkg + for _, file := range files { + switch name := file.Name.Name; pkg.name { + case "": + if name != "_" { + pkg.name = name + } else { + check.errorf(file.Name.Pos(), "invalid package name _") + } + fallthrough + + case name: + check.files = append(check.files, file) + + default: + check.errorf(file.Package, "package %s; expected %s", name, pkg.name) + // ignore this file + } + } +} + +// A bailout panic is used for early termination. +type bailout struct{} + +func (check *Checker) handleBailout(err *error) { + switch p := recover().(type) { + case nil, bailout: + // normal return or early exit + *err = check.firstErr + default: + // re-panic + panic(p) + } +} + +// Files checks the provided files as part of the checker's package. +func (check *Checker) Files(files []*ast.File) (err error) { + defer check.handleBailout(&err) + + check.initFiles(files) + + check.collectObjects() + + check.packageObjects(check.resolveOrder()) + + check.functionBodies() + + check.initOrder() + + if !check.conf.DisableUnusedImportCheck { + check.unusedImports() + } + + // perform delayed checks + for _, f := range check.delayed { + f() + } + + check.recordUntyped() + + check.pkg.complete = true + return +} + +func (check *Checker) recordUntyped() { + if !debug && check.Types == nil { + return // nothing to do + } + + for x, info := range check.untyped { + if debug && isTyped(info.typ) { + check.dump("%s: %s (type %s) is typed", x.Pos(), x, info.typ) + unreachable() + } + check.recordTypeAndValue(x, info.mode, info.typ, info.val) + } +} + +func (check *Checker) recordTypeAndValue(x ast.Expr, mode operandMode, typ Type, val exact.Value) { + assert(x != nil) + assert(typ != nil) + if mode == invalid { + return // omit + } + assert(typ != nil) + if mode == constant { + assert(val != nil) + assert(typ == Typ[Invalid] || isConstType(typ)) + } + if m := check.Types; m != nil { + m[x] = TypeAndValue{mode, typ, val} + } +} + +func (check *Checker) recordBuiltinType(f ast.Expr, sig *Signature) { + // f must be a (possibly parenthesized) identifier denoting a built-in + // (built-ins in package unsafe always produce a constant result and + // we don't record their signatures, so we don't see qualified idents + // here): record the signature for f and possible children. + for { + check.recordTypeAndValue(f, builtin, sig, nil) + switch p := f.(type) { + case *ast.Ident: + return // we're done + case *ast.ParenExpr: + f = p.X + default: + unreachable() + } + } +} + +func (check *Checker) recordCommaOkTypes(x ast.Expr, a [2]Type) { + assert(x != nil) + if a[0] == nil || a[1] == nil { + return + } + assert(isTyped(a[0]) && isTyped(a[1]) && isBoolean(a[1])) + if m := check.Types; m != nil { + for { + tv := m[x] + assert(tv.Type != nil) // should have been recorded already + pos := x.Pos() + tv.Type = NewTuple( + NewVar(pos, check.pkg, "", a[0]), + NewVar(pos, check.pkg, "", a[1]), + ) + m[x] = tv + // if x is a parenthesized expression (p.X), update p.X + p, _ := x.(*ast.ParenExpr) + if p == nil { + break + } + x = p.X + } + } +} + +func (check *Checker) recordDef(id *ast.Ident, obj Object) { + assert(id != nil) + if m := check.Defs; m != nil { + m[id] = obj + } +} + +func (check *Checker) recordUse(id *ast.Ident, obj Object) { + assert(id != nil) + assert(obj != nil) + if m := check.Uses; m != nil { + m[id] = obj + } +} + +func (check *Checker) recordImplicit(node ast.Node, obj Object) { + assert(node != nil) + assert(obj != nil) + if m := check.Implicits; m != nil { + m[node] = obj + } +} + +func (check *Checker) recordSelection(x *ast.SelectorExpr, kind SelectionKind, recv Type, obj Object, index []int, indirect bool) { + assert(obj != nil && (recv == nil || len(index) > 0)) + check.recordUse(x.Sel, obj) + // TODO(gri) Should we also call recordTypeAndValue? + if m := check.Selections; m != nil { + m[x] = &Selection{kind, recv, obj, index, indirect} + } +} + +func (check *Checker) recordScope(node ast.Node, scope *Scope) { + assert(node != nil) + assert(scope != nil) + if m := check.Scopes; m != nil { + m[node] = scope + } +} diff --git a/vendor/golang.org/x/tools/go/types/conversions.go b/vendor/golang.org/x/tools/go/types/conversions.go new file mode 100644 index 0000000..6e279ca --- /dev/null +++ b/vendor/golang.org/x/tools/go/types/conversions.go @@ -0,0 +1,146 @@ +// Copyright 2012 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// This file implements typechecking of conversions. + +package types + +import "golang.org/x/tools/go/exact" + +// Conversion type-checks the conversion T(x). +// The result is in x. +func (check *Checker) conversion(x *operand, T Type) { + constArg := x.mode == constant + + var ok bool + switch { + case constArg && isConstType(T): + // constant conversion + switch t := T.Underlying().(*Basic); { + case representableConst(x.val, check.conf, t.kind, &x.val): + ok = true + case isInteger(x.typ) && isString(t): + codepoint := int64(-1) + if i, ok := exact.Int64Val(x.val); ok { + codepoint = i + } + // If codepoint < 0 the absolute value is too large (or unknown) for + // conversion. This is the same as converting any other out-of-range + // value - let string(codepoint) do the work. + x.val = exact.MakeString(string(codepoint)) + ok = true + } + case x.convertibleTo(check.conf, T): + // non-constant conversion + x.mode = value + ok = true + } + + if !ok { + check.errorf(x.pos(), "cannot convert %s to %s", x, T) + x.mode = invalid + return + } + + // The conversion argument types are final. For untyped values the + // conversion provides the type, per the spec: "A constant may be + // given a type explicitly by a constant declaration or conversion,...". + final := x.typ + if isUntyped(x.typ) { + final = T + // - For conversions to interfaces, use the argument's default type. + // - For conversions of untyped constants to non-constant types, also + // use the default type (e.g., []byte("foo") should report string + // not []byte as type for the constant "foo"). + // - Keep untyped nil for untyped nil arguments. + if IsInterface(T) || constArg && !isConstType(T) { + final = defaultType(x.typ) + } + check.updateExprType(x.expr, final, true) + } + + x.typ = T +} + +func (x *operand) convertibleTo(conf *Config, T Type) bool { + // "x is assignable to T" + if x.assignableTo(conf, T) { + return true + } + + // "x's type and T have identical underlying types" + V := x.typ + Vu := V.Underlying() + Tu := T.Underlying() + if Identical(Vu, Tu) { + return true + } + + // "x's type and T are unnamed pointer types and their pointer base types have identical underlying types" + if V, ok := V.(*Pointer); ok { + if T, ok := T.(*Pointer); ok { + if Identical(V.base.Underlying(), T.base.Underlying()) { + return true + } + } + } + + // "x's type and T are both integer or floating point types" + if (isInteger(V) || isFloat(V)) && (isInteger(T) || isFloat(T)) { + return true + } + + // "x's type and T are both complex types" + if isComplex(V) && isComplex(T) { + return true + } + + // "x is an integer or a slice of bytes or runes and T is a string type" + if (isInteger(V) || isBytesOrRunes(Vu)) && isString(T) { + return true + } + + // "x is a string and T is a slice of bytes or runes" + if isString(V) && isBytesOrRunes(Tu) { + return true + } + + // package unsafe: + // "any pointer or value of underlying type uintptr can be converted into a unsafe.Pointer" + if (isPointer(Vu) || isUintptr(Vu)) && isUnsafePointer(T) { + return true + } + // "and vice versa" + if isUnsafePointer(V) && (isPointer(Tu) || isUintptr(Tu)) { + return true + } + + return false +} + +func isUintptr(typ Type) bool { + t, ok := typ.Underlying().(*Basic) + return ok && t.kind == Uintptr +} + +func isUnsafePointer(typ Type) bool { + // TODO(gri): Is this (typ.Underlying() instead of just typ) correct? + // The spec does not say so, but gc claims it is. See also + // issue 6326. + t, ok := typ.Underlying().(*Basic) + return ok && t.kind == UnsafePointer +} + +func isPointer(typ Type) bool { + _, ok := typ.Underlying().(*Pointer) + return ok +} + +func isBytesOrRunes(typ Type) bool { + if s, ok := typ.(*Slice); ok { + t, ok := s.elem.Underlying().(*Basic) + return ok && (t.kind == Byte || t.kind == Rune) + } + return false +} diff --git a/vendor/golang.org/x/tools/go/types/decl.go b/vendor/golang.org/x/tools/go/types/decl.go new file mode 100644 index 0000000..9eba85c --- /dev/null +++ b/vendor/golang.org/x/tools/go/types/decl.go @@ -0,0 +1,431 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package types + +import ( + "go/ast" + "go/token" + + "golang.org/x/tools/go/exact" +) + +func (check *Checker) reportAltDecl(obj Object) { + if pos := obj.Pos(); pos.IsValid() { + // We use "other" rather than "previous" here because + // the first declaration seen may not be textually + // earlier in the source. + check.errorf(pos, "\tother declaration of %s", obj.Name()) // secondary error, \t indented + } +} + +func (check *Checker) declare(scope *Scope, id *ast.Ident, obj Object, pos token.Pos) { + // spec: "The blank identifier, represented by the underscore + // character _, may be used in a declaration like any other + // identifier but the declaration does not introduce a new + // binding." + if obj.Name() != "_" { + if alt := scope.Insert(obj); alt != nil { + check.errorf(obj.Pos(), "%s redeclared in this block", obj.Name()) + check.reportAltDecl(alt) + return + } + obj.setScopePos(pos) + } + if id != nil { + check.recordDef(id, obj) + } +} + +// objDecl type-checks the declaration of obj in its respective (file) context. +// See check.typ for the details on def and path. +func (check *Checker) objDecl(obj Object, def *Named, path []*TypeName) { + if obj.Type() != nil { + return // already checked - nothing to do + } + + if trace { + check.trace(obj.Pos(), "-- declaring %s", obj.Name()) + check.indent++ + defer func() { + check.indent-- + check.trace(obj.Pos(), "=> %s", obj) + }() + } + + d := check.objMap[obj] + if d == nil { + check.dump("%s: %s should have been declared", obj.Pos(), obj.Name()) + unreachable() + } + + // save/restore current context and setup object context + defer func(ctxt context) { + check.context = ctxt + }(check.context) + check.context = context{ + scope: d.file, + } + + // Const and var declarations must not have initialization + // cycles. We track them by remembering the current declaration + // in check.decl. Initialization expressions depending on other + // consts, vars, or functions, add dependencies to the current + // check.decl. + switch obj := obj.(type) { + case *Const: + check.decl = d // new package-level const decl + check.constDecl(obj, d.typ, d.init) + case *Var: + check.decl = d // new package-level var decl + check.varDecl(obj, d.lhs, d.typ, d.init) + case *TypeName: + // invalid recursive types are detected via path + check.typeDecl(obj, d.typ, def, path) + case *Func: + // functions may be recursive - no need to track dependencies + check.funcDecl(obj, d) + default: + unreachable() + } +} + +func (check *Checker) constDecl(obj *Const, typ, init ast.Expr) { + assert(obj.typ == nil) + + if obj.visited { + obj.typ = Typ[Invalid] + return + } + obj.visited = true + + // use the correct value of iota + assert(check.iota == nil) + check.iota = obj.val + defer func() { check.iota = nil }() + + // provide valid constant value under all circumstances + obj.val = exact.MakeUnknown() + + // determine type, if any + if typ != nil { + t := check.typ(typ) + if !isConstType(t) { + check.errorf(typ.Pos(), "invalid constant type %s", t) + obj.typ = Typ[Invalid] + return + } + obj.typ = t + } + + // check initialization + var x operand + if init != nil { + check.expr(&x, init) + } + check.initConst(obj, &x) +} + +func (check *Checker) varDecl(obj *Var, lhs []*Var, typ, init ast.Expr) { + assert(obj.typ == nil) + + if obj.visited { + obj.typ = Typ[Invalid] + return + } + obj.visited = true + + // var declarations cannot use iota + assert(check.iota == nil) + + // determine type, if any + if typ != nil { + obj.typ = check.typ(typ) + } + + // check initialization + if init == nil { + if typ == nil { + // error reported before by arityMatch + obj.typ = Typ[Invalid] + } + return + } + + if lhs == nil || len(lhs) == 1 { + assert(lhs == nil || lhs[0] == obj) + var x operand + check.expr(&x, init) + check.initVar(obj, &x, false) + return + } + + if debug { + // obj must be one of lhs + found := false + for _, lhs := range lhs { + if obj == lhs { + found = true + break + } + } + if !found { + panic("inconsistent lhs") + } + } + check.initVars(lhs, []ast.Expr{init}, token.NoPos) +} + +// underlying returns the underlying type of typ; possibly by following +// forward chains of named types. Such chains only exist while named types +// are incomplete. +func underlying(typ Type) Type { + for { + n, _ := typ.(*Named) + if n == nil { + break + } + typ = n.underlying + } + return typ +} + +func (n *Named) setUnderlying(typ Type) { + if n != nil { + n.underlying = typ + } +} + +func (check *Checker) typeDecl(obj *TypeName, typ ast.Expr, def *Named, path []*TypeName) { + assert(obj.typ == nil) + + // type declarations cannot use iota + assert(check.iota == nil) + + named := &Named{obj: obj} + def.setUnderlying(named) + obj.typ = named // make sure recursive type declarations terminate + + // determine underlying type of named + check.typExpr(typ, named, append(path, obj)) + + // The underlying type of named may be itself a named type that is + // incomplete: + // + // type ( + // A B + // B *C + // C A + // ) + // + // The type of C is the (named) type of A which is incomplete, + // and which has as its underlying type the named type B. + // Determine the (final, unnamed) underlying type by resolving + // any forward chain (they always end in an unnamed type). + named.underlying = underlying(named.underlying) + + // check and add associated methods + // TODO(gri) It's easy to create pathological cases where the + // current approach is incorrect: In general we need to know + // and add all methods _before_ type-checking the type. + // See http://play.golang.org/p/WMpE0q2wK8 + check.addMethodDecls(obj) +} + +func (check *Checker) addMethodDecls(obj *TypeName) { + // get associated methods + methods := check.methods[obj.name] + if len(methods) == 0 { + return // no methods + } + delete(check.methods, obj.name) + + // use an objset to check for name conflicts + var mset objset + + // spec: "If the base type is a struct type, the non-blank method + // and field names must be distinct." + base := obj.typ.(*Named) + if t, _ := base.underlying.(*Struct); t != nil { + for _, fld := range t.fields { + if fld.name != "_" { + assert(mset.insert(fld) == nil) + } + } + } + + // Checker.Files may be called multiple times; additional package files + // may add methods to already type-checked types. Add pre-existing methods + // so that we can detect redeclarations. + for _, m := range base.methods { + assert(m.name != "_") + assert(mset.insert(m) == nil) + } + + // type-check methods + for _, m := range methods { + // spec: "For a base type, the non-blank names of methods bound + // to it must be unique." + if m.name != "_" { + if alt := mset.insert(m); alt != nil { + switch alt.(type) { + case *Var: + check.errorf(m.pos, "field and method with the same name %s", m.name) + case *Func: + check.errorf(m.pos, "method %s already declared for %s", m.name, base) + default: + unreachable() + } + check.reportAltDecl(alt) + continue + } + } + check.objDecl(m, nil, nil) + // methods with blank _ names cannot be found - don't keep them + if m.name != "_" { + base.methods = append(base.methods, m) + } + } +} + +func (check *Checker) funcDecl(obj *Func, decl *declInfo) { + assert(obj.typ == nil) + + // func declarations cannot use iota + assert(check.iota == nil) + + sig := new(Signature) + obj.typ = sig // guard against cycles + fdecl := decl.fdecl + check.funcType(sig, fdecl.Recv, fdecl.Type) + if sig.recv == nil && obj.name == "init" && (sig.params.Len() > 0 || sig.results.Len() > 0) { + check.errorf(fdecl.Pos(), "func init must have no arguments and no return values") + // ok to continue + } + + // function body must be type-checked after global declarations + // (functions implemented elsewhere have no body) + if !check.conf.IgnoreFuncBodies && fdecl.Body != nil { + check.later(obj.name, decl, sig, fdecl.Body) + } +} + +func (check *Checker) declStmt(decl ast.Decl) { + pkg := check.pkg + + switch d := decl.(type) { + case *ast.BadDecl: + // ignore + + case *ast.GenDecl: + var last *ast.ValueSpec // last ValueSpec with type or init exprs seen + for iota, spec := range d.Specs { + switch s := spec.(type) { + case *ast.ValueSpec: + switch d.Tok { + case token.CONST: + // determine which init exprs to use + switch { + case s.Type != nil || len(s.Values) > 0: + last = s + case last == nil: + last = new(ast.ValueSpec) // make sure last exists + } + + // declare all constants + lhs := make([]*Const, len(s.Names)) + for i, name := range s.Names { + obj := NewConst(name.Pos(), pkg, name.Name, nil, exact.MakeInt64(int64(iota))) + lhs[i] = obj + + var init ast.Expr + if i < len(last.Values) { + init = last.Values[i] + } + + check.constDecl(obj, last.Type, init) + } + + check.arityMatch(s, last) + + // spec: "The scope of a constant or variable identifier declared + // inside a function begins at the end of the ConstSpec or VarSpec + // (ShortVarDecl for short variable declarations) and ends at the + // end of the innermost containing block." + scopePos := s.End() + for i, name := range s.Names { + check.declare(check.scope, name, lhs[i], scopePos) + } + + case token.VAR: + lhs0 := make([]*Var, len(s.Names)) + for i, name := range s.Names { + lhs0[i] = NewVar(name.Pos(), pkg, name.Name, nil) + } + + // initialize all variables + for i, obj := range lhs0 { + var lhs []*Var + var init ast.Expr + switch len(s.Values) { + case len(s.Names): + // lhs and rhs match + init = s.Values[i] + case 1: + // rhs is expected to be a multi-valued expression + lhs = lhs0 + init = s.Values[0] + default: + if i < len(s.Values) { + init = s.Values[i] + } + } + check.varDecl(obj, lhs, s.Type, init) + if len(s.Values) == 1 { + // If we have a single lhs variable we are done either way. + // If we have a single rhs expression, it must be a multi- + // valued expression, in which case handling the first lhs + // variable will cause all lhs variables to have a type + // assigned, and we are done as well. + if debug { + for _, obj := range lhs0 { + assert(obj.typ != nil) + } + } + break + } + } + + check.arityMatch(s, nil) + + // declare all variables + // (only at this point are the variable scopes (parents) set) + scopePos := s.End() // see constant declarations + for i, name := range s.Names { + // see constant declarations + check.declare(check.scope, name, lhs0[i], scopePos) + } + + default: + check.invalidAST(s.Pos(), "invalid token %s", d.Tok) + } + + case *ast.TypeSpec: + obj := NewTypeName(s.Name.Pos(), pkg, s.Name.Name, nil) + // spec: "The scope of a type identifier declared inside a function + // begins at the identifier in the TypeSpec and ends at the end of + // the innermost containing block." + scopePos := s.Name.Pos() + check.declare(check.scope, s.Name, obj, scopePos) + check.typeDecl(obj, s.Type, nil, nil) + + default: + check.invalidAST(s.Pos(), "const, type, or var declaration expected") + } + } + + default: + check.invalidAST(d.Pos(), "unknown ast.Decl node %T", d) + } +} diff --git a/vendor/golang.org/x/tools/go/types/errors.go b/vendor/golang.org/x/tools/go/types/errors.go new file mode 100644 index 0000000..0c0049b --- /dev/null +++ b/vendor/golang.org/x/tools/go/types/errors.go @@ -0,0 +1,103 @@ +// Copyright 2012 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// This file implements various error reporters. + +package types + +import ( + "fmt" + "go/ast" + "go/token" + "strings" +) + +func assert(p bool) { + if !p { + panic("assertion failed") + } +} + +func unreachable() { + panic("unreachable") +} + +func (check *Checker) qualifier(pkg *Package) string { + if pkg != check.pkg { + return pkg.path + } + return "" +} + +func (check *Checker) sprintf(format string, args ...interface{}) string { + for i, arg := range args { + switch a := arg.(type) { + case nil: + arg = "" + case operand: + panic("internal error: should always pass *operand") + case *operand: + arg = operandString(a, check.qualifier) + case token.Pos: + arg = check.fset.Position(a).String() + case ast.Expr: + arg = ExprString(a) + case Object: + arg = ObjectString(a, check.qualifier) + case Type: + arg = TypeString(a, check.qualifier) + } + args[i] = arg + } + return fmt.Sprintf(format, args...) +} + +func (check *Checker) trace(pos token.Pos, format string, args ...interface{}) { + fmt.Printf("%s:\t%s%s\n", + check.fset.Position(pos), + strings.Repeat(". ", check.indent), + check.sprintf(format, args...), + ) +} + +// dump is only needed for debugging +func (check *Checker) dump(format string, args ...interface{}) { + fmt.Println(check.sprintf(format, args...)) +} + +func (check *Checker) err(pos token.Pos, msg string, soft bool) { + err := Error{check.fset, pos, msg, soft} + if check.firstErr == nil { + check.firstErr = err + } + f := check.conf.Error + if f == nil { + panic(bailout{}) // report only first error + } + f(err) +} + +func (check *Checker) error(pos token.Pos, msg string) { + check.err(pos, msg, false) +} + +func (check *Checker) errorf(pos token.Pos, format string, args ...interface{}) { + check.err(pos, check.sprintf(format, args...), false) +} + +func (check *Checker) softErrorf(pos token.Pos, format string, args ...interface{}) { + check.err(pos, check.sprintf(format, args...), true) +} + +func (check *Checker) invalidAST(pos token.Pos, format string, args ...interface{}) { + check.errorf(pos, "invalid AST: "+format, args...) +} + +func (check *Checker) invalidArg(pos token.Pos, format string, args ...interface{}) { + check.errorf(pos, "invalid argument: "+format, args...) +} + +func (check *Checker) invalidOp(pos token.Pos, format string, args ...interface{}) { + check.errorf(pos, "invalid operation: "+format, args...) +} diff --git a/vendor/golang.org/x/tools/go/types/eval.go b/vendor/golang.org/x/tools/go/types/eval.go new file mode 100644 index 0000000..c09f2a3 --- /dev/null +++ b/vendor/golang.org/x/tools/go/types/eval.go @@ -0,0 +1,87 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package types + +import ( + "fmt" + "go/parser" + "go/token" +) + +// Eval returns the type and, if constant, the value for the +// expression expr, evaluated at position pos of package pkg, +// which must have been derived from type-checking an AST with +// complete position information relative to the provided file +// set. +// +// If the expression contains function literals, their bodies +// are ignored (i.e., the bodies are not type-checked). +// +// If pkg == nil, the Universe scope is used and the provided +// position pos is ignored. If pkg != nil, and pos is invalid, +// the package scope is used. Otherwise, pos must belong to the +// package. +// +// An error is returned if pos is not within the package or +// if the node cannot be evaluated. +// +// Note: Eval should not be used instead of running Check to compute +// types and values, but in addition to Check. Eval will re-evaluate +// its argument each time, and it also does not know about the context +// in which an expression is used (e.g., an assignment). Thus, top- +// level untyped constants will return an untyped type rather then the +// respective context-specific type. +// +func Eval(fset *token.FileSet, pkg *Package, pos token.Pos, expr string) (tv TypeAndValue, err error) { + // determine scope + var scope *Scope + if pkg == nil { + scope = Universe + pos = token.NoPos + } else if !pos.IsValid() { + scope = pkg.scope + } else { + // The package scope extent (position information) may be + // incorrect (files spread accross a wide range of fset + // positions) - ignore it and just consider its children + // (file scopes). + for _, fscope := range pkg.scope.children { + if scope = fscope.Innermost(pos); scope != nil { + break + } + } + if scope == nil || debug { + s := scope + for s != nil && s != pkg.scope { + s = s.parent + } + // s == nil || s == pkg.scope + if s == nil { + return TypeAndValue{}, fmt.Errorf("no position %s found in package %s", fset.Position(pos), pkg.name) + } + } + } + + // parse expressions + // BUG(gri) In case of type-checking errors below, the type checker + // doesn't have the correct file set for expr. The correct + // solution requires a ParseExpr that uses the incoming + // file set fset. + node, err := parser.ParseExpr(expr) + if err != nil { + return TypeAndValue{}, err + } + + // initialize checker + check := NewChecker(nil, fset, pkg, nil) + check.scope = scope + check.pos = pos + defer check.handleBailout(&err) + + // evaluate node + var x operand + check.rawExpr(&x, node, nil) + return TypeAndValue{x.mode, x.typ, x.val}, err +} diff --git a/vendor/golang.org/x/tools/go/types/expr.go b/vendor/golang.org/x/tools/go/types/expr.go new file mode 100644 index 0000000..6efc7b4 --- /dev/null +++ b/vendor/golang.org/x/tools/go/types/expr.go @@ -0,0 +1,1497 @@ +// Copyright 2012 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// This file implements typechecking of expressions. + +package types + +import ( + "fmt" + "go/ast" + "go/token" + "math" + + "golang.org/x/tools/go/exact" +) + +/* +Basic algorithm: + +Expressions are checked recursively, top down. Expression checker functions +are generally of the form: + + func f(x *operand, e *ast.Expr, ...) + +where e is the expression to be checked, and x is the result of the check. +The check performed by f may fail in which case x.mode == invalid, and +related error messages will have been issued by f. + +If a hint argument is present, it is the composite literal element type +of an outer composite literal; it is used to type-check composite literal +elements that have no explicit type specification in the source +(e.g.: []T{{...}, {...}}, the hint is the type T in this case). + +All expressions are checked via rawExpr, which dispatches according +to expression kind. Upon returning, rawExpr is recording the types and +constant values for all expressions that have an untyped type (those types +may change on the way up in the expression tree). Usually these are constants, +but the results of comparisons or non-constant shifts of untyped constants +may also be untyped, but not constant. + +Untyped expressions may eventually become fully typed (i.e., not untyped), +typically when the value is assigned to a variable, or is used otherwise. +The updateExprType method is used to record this final type and update +the recorded types: the type-checked expression tree is again traversed down, +and the new type is propagated as needed. Untyped constant expression values +that become fully typed must now be representable by the full type (constant +sub-expression trees are left alone except for their roots). This mechanism +ensures that a client sees the actual (run-time) type an untyped value would +have. It also permits type-checking of lhs shift operands "as if the shift +were not present": when updateExprType visits an untyped lhs shift operand +and assigns it it's final type, that type must be an integer type, and a +constant lhs must be representable as an integer. + +When an expression gets its final type, either on the way out from rawExpr, +on the way down in updateExprType, or at the end of the type checker run, +the type (and constant value, if any) is recorded via Info.Types, if present. +*/ + +type opPredicates map[token.Token]func(Type) bool + +var unaryOpPredicates = opPredicates{ + token.ADD: isNumeric, + token.SUB: isNumeric, + token.XOR: isInteger, + token.NOT: isBoolean, +} + +func (check *Checker) op(m opPredicates, x *operand, op token.Token) bool { + if pred := m[op]; pred != nil { + if !pred(x.typ) { + check.invalidOp(x.pos(), "operator %s not defined for %s", op, x) + return false + } + } else { + check.invalidAST(x.pos(), "unknown operator %s", op) + return false + } + return true +} + +// The unary expression e may be nil. It's passed in for better error messages only. +func (check *Checker) unary(x *operand, e *ast.UnaryExpr, op token.Token) { + switch op { + case token.AND: + // spec: "As an exception to the addressability + // requirement x may also be a composite literal." + if _, ok := unparen(x.expr).(*ast.CompositeLit); !ok && x.mode != variable { + check.invalidOp(x.pos(), "cannot take address of %s", x) + x.mode = invalid + return + } + x.mode = value + x.typ = &Pointer{base: x.typ} + return + + case token.ARROW: + typ, ok := x.typ.Underlying().(*Chan) + if !ok { + check.invalidOp(x.pos(), "cannot receive from non-channel %s", x) + x.mode = invalid + return + } + if typ.dir == SendOnly { + check.invalidOp(x.pos(), "cannot receive from send-only channel %s", x) + x.mode = invalid + return + } + x.mode = commaok + x.typ = typ.elem + check.hasCallOrRecv = true + return + } + + if !check.op(unaryOpPredicates, x, op) { + x.mode = invalid + return + } + + if x.mode == constant { + typ := x.typ.Underlying().(*Basic) + size := -1 + if isUnsigned(typ) { + size = int(check.conf.sizeof(typ)) + } + x.val = exact.UnaryOp(op, x.val, size) + // Typed constants must be representable in + // their type after each constant operation. + if isTyped(typ) { + if e != nil { + x.expr = e // for better error message + } + check.representable(x, typ) + } + return + } + + x.mode = value + // x.typ remains unchanged +} + +func isShift(op token.Token) bool { + return op == token.SHL || op == token.SHR +} + +func isComparison(op token.Token) bool { + // Note: tokens are not ordered well to make this much easier + switch op { + case token.EQL, token.NEQ, token.LSS, token.LEQ, token.GTR, token.GEQ: + return true + } + return false +} + +func fitsFloat32(x exact.Value) bool { + f32, _ := exact.Float32Val(x) + f := float64(f32) + return !math.IsInf(f, 0) +} + +func roundFloat32(x exact.Value) exact.Value { + f32, _ := exact.Float32Val(x) + f := float64(f32) + if !math.IsInf(f, 0) { + return exact.MakeFloat64(f) + } + return nil +} + +func fitsFloat64(x exact.Value) bool { + f, _ := exact.Float64Val(x) + return !math.IsInf(f, 0) +} + +func roundFloat64(x exact.Value) exact.Value { + f, _ := exact.Float64Val(x) + if !math.IsInf(f, 0) { + return exact.MakeFloat64(f) + } + return nil +} + +// representableConst reports whether x can be represented as +// value of the given basic type kind and for the configuration +// provided (only needed for int/uint sizes). +// +// If rounded != nil, *rounded is set to the rounded value of x for +// representable floating-point values; it is left alone otherwise. +// It is ok to provide the addressof the first argument for rounded. +func representableConst(x exact.Value, conf *Config, as BasicKind, rounded *exact.Value) bool { + switch x.Kind() { + case exact.Unknown: + return true + + case exact.Bool: + return as == Bool || as == UntypedBool + + case exact.Int: + if x, ok := exact.Int64Val(x); ok { + switch as { + case Int: + var s = uint(conf.sizeof(Typ[as])) * 8 + return int64(-1)<<(s-1) <= x && x <= int64(1)<<(s-1)-1 + case Int8: + const s = 8 + return -1<<(s-1) <= x && x <= 1<<(s-1)-1 + case Int16: + const s = 16 + return -1<<(s-1) <= x && x <= 1<<(s-1)-1 + case Int32: + const s = 32 + return -1<<(s-1) <= x && x <= 1<<(s-1)-1 + case Int64: + return true + case Uint, Uintptr: + if s := uint(conf.sizeof(Typ[as])) * 8; s < 64 { + return 0 <= x && x <= int64(1)<= 0 && n <= int(s) + case Uint64: + return exact.Sign(x) >= 0 && n <= 64 + case Float32, Complex64: + if rounded == nil { + return fitsFloat32(x) + } + r := roundFloat32(x) + if r != nil { + *rounded = r + return true + } + case Float64, Complex128: + if rounded == nil { + return fitsFloat64(x) + } + r := roundFloat64(x) + if r != nil { + *rounded = r + return true + } + case UntypedInt, UntypedFloat, UntypedComplex: + return true + } + + case exact.Float: + switch as { + case Float32, Complex64: + if rounded == nil { + return fitsFloat32(x) + } + r := roundFloat32(x) + if r != nil { + *rounded = r + return true + } + case Float64, Complex128: + if rounded == nil { + return fitsFloat64(x) + } + r := roundFloat64(x) + if r != nil { + *rounded = r + return true + } + case UntypedFloat, UntypedComplex: + return true + } + + case exact.Complex: + switch as { + case Complex64: + if rounded == nil { + return fitsFloat32(exact.Real(x)) && fitsFloat32(exact.Imag(x)) + } + re := roundFloat32(exact.Real(x)) + im := roundFloat32(exact.Imag(x)) + if re != nil && im != nil { + *rounded = exact.BinaryOp(re, token.ADD, exact.MakeImag(im)) + return true + } + case Complex128: + if rounded == nil { + return fitsFloat64(exact.Real(x)) && fitsFloat64(exact.Imag(x)) + } + re := roundFloat64(exact.Real(x)) + im := roundFloat64(exact.Imag(x)) + if re != nil && im != nil { + *rounded = exact.BinaryOp(re, token.ADD, exact.MakeImag(im)) + return true + } + case UntypedComplex: + return true + } + + case exact.String: + return as == String || as == UntypedString + + default: + unreachable() + } + + return false +} + +// representable checks that a constant operand is representable in the given basic type. +func (check *Checker) representable(x *operand, typ *Basic) { + assert(x.mode == constant) + if !representableConst(x.val, check.conf, typ.kind, &x.val) { + var msg string + if isNumeric(x.typ) && isNumeric(typ) { + // numeric conversion : error msg + // + // integer -> integer : overflows + // integer -> float : overflows (actually not possible) + // float -> integer : truncated + // float -> float : overflows + // + if !isInteger(x.typ) && isInteger(typ) { + msg = "%s truncated to %s" + } else { + msg = "%s overflows %s" + } + } else { + msg = "cannot convert %s to %s" + } + check.errorf(x.pos(), msg, x, typ) + x.mode = invalid + } +} + +// updateExprType updates the type of x to typ and invokes itself +// recursively for the operands of x, depending on expression kind. +// If typ is still an untyped and not the final type, updateExprType +// only updates the recorded untyped type for x and possibly its +// operands. Otherwise (i.e., typ is not an untyped type anymore, +// or it is the final type for x), the type and value are recorded. +// Also, if x is a constant, it must be representable as a value of typ, +// and if x is the (formerly untyped) lhs operand of a non-constant +// shift, it must be an integer value. +// +func (check *Checker) updateExprType(x ast.Expr, typ Type, final bool) { + old, found := check.untyped[x] + if !found { + return // nothing to do + } + + // update operands of x if necessary + switch x := x.(type) { + case *ast.BadExpr, + *ast.FuncLit, + *ast.CompositeLit, + *ast.IndexExpr, + *ast.SliceExpr, + *ast.TypeAssertExpr, + *ast.StarExpr, + *ast.KeyValueExpr, + *ast.ArrayType, + *ast.StructType, + *ast.FuncType, + *ast.InterfaceType, + *ast.MapType, + *ast.ChanType: + // These expression are never untyped - nothing to do. + // The respective sub-expressions got their final types + // upon assignment or use. + if debug { + check.dump("%s: found old type(%s): %s (new: %s)", x.Pos(), x, old.typ, typ) + unreachable() + } + return + + case *ast.CallExpr: + // Resulting in an untyped constant (e.g., built-in complex). + // The respective calls take care of calling updateExprType + // for the arguments if necessary. + + case *ast.Ident, *ast.BasicLit, *ast.SelectorExpr: + // An identifier denoting a constant, a constant literal, + // or a qualified identifier (imported untyped constant). + // No operands to take care of. + + case *ast.ParenExpr: + check.updateExprType(x.X, typ, final) + + case *ast.UnaryExpr: + // If x is a constant, the operands were constants. + // They don't need to be updated since they never + // get "materialized" into a typed value; and they + // will be processed at the end of the type check. + if old.val != nil { + break + } + check.updateExprType(x.X, typ, final) + + case *ast.BinaryExpr: + if old.val != nil { + break // see comment for unary expressions + } + if isComparison(x.Op) { + // The result type is independent of operand types + // and the operand types must have final types. + } else if isShift(x.Op) { + // The result type depends only on lhs operand. + // The rhs type was updated when checking the shift. + check.updateExprType(x.X, typ, final) + } else { + // The operand types match the result type. + check.updateExprType(x.X, typ, final) + check.updateExprType(x.Y, typ, final) + } + + default: + unreachable() + } + + // If the new type is not final and still untyped, just + // update the recorded type. + if !final && isUntyped(typ) { + old.typ = typ.Underlying().(*Basic) + check.untyped[x] = old + return + } + + // Otherwise we have the final (typed or untyped type). + // Remove it from the map of yet untyped expressions. + delete(check.untyped, x) + + // If x is the lhs of a shift, its final type must be integer. + // We already know from the shift check that it is representable + // as an integer if it is a constant. + if old.isLhs && !isInteger(typ) { + check.invalidOp(x.Pos(), "shifted operand %s (type %s) must be integer", x, typ) + return + } + + // Everything's fine, record final type and value for x. + check.recordTypeAndValue(x, old.mode, typ, old.val) +} + +// updateExprVal updates the value of x to val. +func (check *Checker) updateExprVal(x ast.Expr, val exact.Value) { + if info, ok := check.untyped[x]; ok { + info.val = val + check.untyped[x] = info + } +} + +// convertUntyped attempts to set the type of an untyped value to the target type. +func (check *Checker) convertUntyped(x *operand, target Type) { + if x.mode == invalid || isTyped(x.typ) || target == Typ[Invalid] { + return + } + + // TODO(gri) Sloppy code - clean up. This function is central + // to assignment and expression checking. + + if isUntyped(target) { + // both x and target are untyped + xkind := x.typ.(*Basic).kind + tkind := target.(*Basic).kind + if isNumeric(x.typ) && isNumeric(target) { + if xkind < tkind { + x.typ = target + check.updateExprType(x.expr, target, false) + } + } else if xkind != tkind { + goto Error + } + return + } + + // typed target + switch t := target.Underlying().(type) { + case *Basic: + if x.mode == constant { + check.representable(x, t) + if x.mode == invalid { + return + } + // expression value may have been rounded - update if needed + // TODO(gri) A floating-point value may silently underflow to + // zero. If it was negative, the sign is lost. See issue 6898. + check.updateExprVal(x.expr, x.val) + } else { + // Non-constant untyped values may appear as the + // result of comparisons (untyped bool), intermediate + // (delayed-checked) rhs operands of shifts, and as + // the value nil. + switch x.typ.(*Basic).kind { + case UntypedBool: + if !isBoolean(target) { + goto Error + } + case UntypedInt, UntypedRune, UntypedFloat, UntypedComplex: + if !isNumeric(target) { + goto Error + } + case UntypedString: + // Non-constant untyped string values are not + // permitted by the spec and should not occur. + unreachable() + case UntypedNil: + // Unsafe.Pointer is a basic type that includes nil. + if !hasNil(target) { + goto Error + } + default: + goto Error + } + } + case *Interface: + if !x.isNil() && !t.Empty() /* empty interfaces are ok */ { + goto Error + } + // Update operand types to the default type rather then + // the target (interface) type: values must have concrete + // dynamic types. If the value is nil, keep it untyped + // (this is important for tools such as go vet which need + // the dynamic type for argument checking of say, print + // functions) + if x.isNil() { + target = Typ[UntypedNil] + } else { + // cannot assign untyped values to non-empty interfaces + if !t.Empty() { + goto Error + } + target = defaultType(x.typ) + } + case *Pointer, *Signature, *Slice, *Map, *Chan: + if !x.isNil() { + goto Error + } + // keep nil untyped - see comment for interfaces, above + target = Typ[UntypedNil] + default: + goto Error + } + + x.typ = target + check.updateExprType(x.expr, target, true) // UntypedNils are final + return + +Error: + check.errorf(x.pos(), "cannot convert %s to %s", x, target) + x.mode = invalid +} + +func (check *Checker) comparison(x, y *operand, op token.Token) { + // spec: "In any comparison, the first operand must be assignable + // to the type of the second operand, or vice versa." + err := "" + if x.assignableTo(check.conf, y.typ) || y.assignableTo(check.conf, x.typ) { + defined := false + switch op { + case token.EQL, token.NEQ: + // spec: "The equality operators == and != apply to operands that are comparable." + defined = Comparable(x.typ) || x.isNil() && hasNil(y.typ) || y.isNil() && hasNil(x.typ) + case token.LSS, token.LEQ, token.GTR, token.GEQ: + // spec: The ordering operators <, <=, >, and >= apply to operands that are ordered." + defined = isOrdered(x.typ) + default: + unreachable() + } + if !defined { + typ := x.typ + if x.isNil() { + typ = y.typ + } + err = check.sprintf("operator %s not defined for %s", op, typ) + } + } else { + err = check.sprintf("mismatched types %s and %s", x.typ, y.typ) + } + + if err != "" { + check.errorf(x.pos(), "cannot compare %s %s %s (%s)", x.expr, op, y.expr, err) + x.mode = invalid + return + } + + if x.mode == constant && y.mode == constant { + x.val = exact.MakeBool(exact.Compare(x.val, op, y.val)) + // The operands are never materialized; no need to update + // their types. + } else { + x.mode = value + // The operands have now their final types, which at run- + // time will be materialized. Update the expression trees. + // If the current types are untyped, the materialized type + // is the respective default type. + check.updateExprType(x.expr, defaultType(x.typ), true) + check.updateExprType(y.expr, defaultType(y.typ), true) + } + + // spec: "Comparison operators compare two operands and yield + // an untyped boolean value." + x.typ = Typ[UntypedBool] +} + +func (check *Checker) shift(x, y *operand, op token.Token) { + untypedx := isUntyped(x.typ) + + // The lhs must be of integer type or be representable + // as an integer; otherwise the shift has no chance. + if !x.isInteger() { + check.invalidOp(x.pos(), "shifted operand %s must be integer", x) + x.mode = invalid + return + } + + // spec: "The right operand in a shift expression must have unsigned + // integer type or be an untyped constant that can be converted to + // unsigned integer type." + switch { + case isInteger(y.typ) && isUnsigned(y.typ): + // nothing to do + case isUntyped(y.typ): + check.convertUntyped(y, Typ[UntypedInt]) + if y.mode == invalid { + x.mode = invalid + return + } + default: + check.invalidOp(y.pos(), "shift count %s must be unsigned integer", y) + x.mode = invalid + return + } + + if x.mode == constant { + if y.mode == constant { + // rhs must be an integer value + if !y.isInteger() { + check.invalidOp(y.pos(), "shift count %s must be unsigned integer", y) + x.mode = invalid + return + } + // rhs must be within reasonable bounds + const stupidShift = 1023 - 1 + 52 // so we can express smallestFloat64 + s, ok := exact.Uint64Val(y.val) + if !ok || s > stupidShift { + check.invalidOp(y.pos(), "stupid shift count %s", y) + x.mode = invalid + return + } + // The lhs is representable as an integer but may not be an integer + // (e.g., 2.0, an untyped float) - this can only happen for untyped + // non-integer numeric constants. Correct the type so that the shift + // result is of integer type. + if !isInteger(x.typ) { + x.typ = Typ[UntypedInt] + } + x.val = exact.Shift(x.val, op, uint(s)) + return + } + + // non-constant shift with constant lhs + if untypedx { + // spec: "If the left operand of a non-constant shift + // expression is an untyped constant, the type of the + // constant is what it would be if the shift expression + // were replaced by its left operand alone.". + // + // Delay operand checking until we know the final type: + // The lhs expression must be in the untyped map, mark + // the entry as lhs shift operand. + info, found := check.untyped[x.expr] + assert(found) + info.isLhs = true + check.untyped[x.expr] = info + // keep x's type + x.mode = value + return + } + } + + // constant rhs must be >= 0 + if y.mode == constant && exact.Sign(y.val) < 0 { + check.invalidOp(y.pos(), "shift count %s must not be negative", y) + } + + // non-constant shift - lhs must be an integer + if !isInteger(x.typ) { + check.invalidOp(x.pos(), "shifted operand %s must be integer", x) + x.mode = invalid + return + } + + x.mode = value +} + +var binaryOpPredicates = opPredicates{ + token.ADD: func(typ Type) bool { return isNumeric(typ) || isString(typ) }, + token.SUB: isNumeric, + token.MUL: isNumeric, + token.QUO: isNumeric, + token.REM: isInteger, + + token.AND: isInteger, + token.OR: isInteger, + token.XOR: isInteger, + token.AND_NOT: isInteger, + + token.LAND: isBoolean, + token.LOR: isBoolean, +} + +// The binary expression e may be nil. It's passed in for better error messages only. +func (check *Checker) binary(x *operand, e *ast.BinaryExpr, lhs, rhs ast.Expr, op token.Token) { + var y operand + + check.expr(x, lhs) + check.expr(&y, rhs) + + if x.mode == invalid { + return + } + if y.mode == invalid { + x.mode = invalid + x.expr = y.expr + return + } + + if isShift(op) { + check.shift(x, &y, op) + return + } + + check.convertUntyped(x, y.typ) + if x.mode == invalid { + return + } + check.convertUntyped(&y, x.typ) + if y.mode == invalid { + x.mode = invalid + return + } + + if isComparison(op) { + check.comparison(x, &y, op) + return + } + + if !Identical(x.typ, y.typ) { + // only report an error if we have valid types + // (otherwise we had an error reported elsewhere already) + if x.typ != Typ[Invalid] && y.typ != Typ[Invalid] { + check.invalidOp(x.pos(), "mismatched types %s and %s", x.typ, y.typ) + } + x.mode = invalid + return + } + + if !check.op(binaryOpPredicates, x, op) { + x.mode = invalid + return + } + + if (op == token.QUO || op == token.REM) && (x.mode == constant || isInteger(x.typ)) && y.mode == constant && exact.Sign(y.val) == 0 { + check.invalidOp(y.pos(), "division by zero") + x.mode = invalid + return + } + + if x.mode == constant && y.mode == constant { + typ := x.typ.Underlying().(*Basic) + // force integer division of integer operands + if op == token.QUO && isInteger(typ) { + op = token.QUO_ASSIGN + } + x.val = exact.BinaryOp(x.val, op, y.val) + // Typed constants must be representable in + // their type after each constant operation. + if isTyped(typ) { + if e != nil { + x.expr = e // for better error message + } + check.representable(x, typ) + } + return + } + + x.mode = value + // x.typ is unchanged +} + +// index checks an index expression for validity. +// If max >= 0, it is the upper bound for index. +// If index is valid and the result i >= 0, then i is the constant value of index. +func (check *Checker) index(index ast.Expr, max int64) (i int64, valid bool) { + var x operand + check.expr(&x, index) + if x.mode == invalid { + return + } + + // an untyped constant must be representable as Int + check.convertUntyped(&x, Typ[Int]) + if x.mode == invalid { + return + } + + // the index must be of integer type + if !isInteger(x.typ) { + check.invalidArg(x.pos(), "index %s must be integer", &x) + return + } + + // a constant index i must be in bounds + if x.mode == constant { + if exact.Sign(x.val) < 0 { + check.invalidArg(x.pos(), "index %s must not be negative", &x) + return + } + i, valid = exact.Int64Val(x.val) + if !valid || max >= 0 && i >= max { + check.errorf(x.pos(), "index %s is out of bounds", &x) + return i, false + } + // 0 <= i [ && i < max ] + return i, true + } + + return -1, true +} + +// indexElts checks the elements (elts) of an array or slice composite literal +// against the literal's element type (typ), and the element indices against +// the literal length if known (length >= 0). It returns the length of the +// literal (maximum index value + 1). +// +func (check *Checker) indexedElts(elts []ast.Expr, typ Type, length int64) int64 { + visited := make(map[int64]bool, len(elts)) + var index, max int64 + for _, e := range elts { + // determine and check index + validIndex := false + eval := e + if kv, _ := e.(*ast.KeyValueExpr); kv != nil { + if i, ok := check.index(kv.Key, length); ok { + if i >= 0 { + index = i + validIndex = true + } else { + check.errorf(e.Pos(), "index %s must be integer constant", kv.Key) + } + } + eval = kv.Value + } else if length >= 0 && index >= length { + check.errorf(e.Pos(), "index %d is out of bounds (>= %d)", index, length) + } else { + validIndex = true + } + + // if we have a valid index, check for duplicate entries + if validIndex { + if visited[index] { + check.errorf(e.Pos(), "duplicate index %d in array or slice literal", index) + } + visited[index] = true + } + index++ + if index > max { + max = index + } + + // check element against composite literal element type + var x operand + check.exprWithHint(&x, eval, typ) + if !check.assignment(&x, typ) && x.mode != invalid { + check.errorf(x.pos(), "cannot use %s as %s value in array or slice literal", &x, typ) + } + } + return max +} + +// exprKind describes the kind of an expression; the kind +// determines if an expression is valid in 'statement context'. +type exprKind int + +const ( + conversion exprKind = iota + expression + statement +) + +// rawExpr typechecks expression e and initializes x with the expression +// value or type. If an error occurred, x.mode is set to invalid. +// If hint != nil, it is the type of a composite literal element. +// +func (check *Checker) rawExpr(x *operand, e ast.Expr, hint Type) exprKind { + if trace { + check.trace(e.Pos(), "%s", e) + check.indent++ + defer func() { + check.indent-- + check.trace(e.Pos(), "=> %s", x) + }() + } + + kind := check.exprInternal(x, e, hint) + + // convert x into a user-friendly set of values + // TODO(gri) this code can be simplified + var typ Type + var val exact.Value + switch x.mode { + case invalid: + typ = Typ[Invalid] + case novalue: + typ = (*Tuple)(nil) + case constant: + typ = x.typ + val = x.val + default: + typ = x.typ + } + assert(x.expr != nil && typ != nil) + + if isUntyped(typ) { + // delay type and value recording until we know the type + // or until the end of type checking + check.rememberUntyped(x.expr, false, x.mode, typ.(*Basic), val) + } else { + check.recordTypeAndValue(e, x.mode, typ, val) + } + + return kind +} + +// exprInternal contains the core of type checking of expressions. +// Must only be called by rawExpr. +// +func (check *Checker) exprInternal(x *operand, e ast.Expr, hint Type) exprKind { + // make sure x has a valid state in case of bailout + // (was issue 5770) + x.mode = invalid + x.typ = Typ[Invalid] + + switch e := e.(type) { + case *ast.BadExpr: + goto Error // error was reported before + + case *ast.Ident: + check.ident(x, e, nil, nil) + + case *ast.Ellipsis: + // ellipses are handled explicitly where they are legal + // (array composite literals and parameter lists) + check.error(e.Pos(), "invalid use of '...'") + goto Error + + case *ast.BasicLit: + x.setConst(e.Kind, e.Value) + if x.mode == invalid { + check.invalidAST(e.Pos(), "invalid literal %v", e.Value) + goto Error + } + + case *ast.FuncLit: + if sig, ok := check.typ(e.Type).(*Signature); ok { + // Anonymous functions are considered part of the + // init expression/func declaration which contains + // them: use existing package-level declaration info. + check.funcBody(check.decl, "", sig, e.Body) + x.mode = value + x.typ = sig + } else { + check.invalidAST(e.Pos(), "invalid function literal %s", e) + goto Error + } + + case *ast.CompositeLit: + typ := hint + openArray := false + if e.Type != nil { + // [...]T array types may only appear with composite literals. + // Check for them here so we don't have to handle ... in general. + typ = nil + if atyp, _ := e.Type.(*ast.ArrayType); atyp != nil && atyp.Len != nil { + if ellip, _ := atyp.Len.(*ast.Ellipsis); ellip != nil && ellip.Elt == nil { + // We have an "open" [...]T array type. + // Create a new ArrayType with unknown length (-1) + // and finish setting it up after analyzing the literal. + typ = &Array{len: -1, elem: check.typ(atyp.Elt)} + openArray = true + } + } + if typ == nil { + typ = check.typ(e.Type) + } + } + if typ == nil { + // TODO(gri) provide better error messages depending on context + check.error(e.Pos(), "missing type in composite literal") + goto Error + } + + switch typ, _ := deref(typ); utyp := typ.Underlying().(type) { + case *Struct: + if len(e.Elts) == 0 { + break + } + fields := utyp.fields + if _, ok := e.Elts[0].(*ast.KeyValueExpr); ok { + // all elements must have keys + visited := make([]bool, len(fields)) + for _, e := range e.Elts { + kv, _ := e.(*ast.KeyValueExpr) + if kv == nil { + check.error(e.Pos(), "mixture of field:value and value elements in struct literal") + continue + } + key, _ := kv.Key.(*ast.Ident) + if key == nil { + check.errorf(kv.Pos(), "invalid field name %s in struct literal", kv.Key) + continue + } + i := fieldIndex(utyp.fields, check.pkg, key.Name) + if i < 0 { + check.errorf(kv.Pos(), "unknown field %s in struct literal", key.Name) + continue + } + fld := fields[i] + check.recordUse(key, fld) + // 0 <= i < len(fields) + if visited[i] { + check.errorf(kv.Pos(), "duplicate field name %s in struct literal", key.Name) + continue + } + visited[i] = true + check.expr(x, kv.Value) + etyp := fld.typ + if !check.assignment(x, etyp) { + if x.mode != invalid { + check.errorf(x.pos(), "cannot use %s as %s value in struct literal", x, etyp) + } + continue + } + } + } else { + // no element must have a key + for i, e := range e.Elts { + if kv, _ := e.(*ast.KeyValueExpr); kv != nil { + check.error(kv.Pos(), "mixture of field:value and value elements in struct literal") + continue + } + check.expr(x, e) + if i >= len(fields) { + check.error(x.pos(), "too many values in struct literal") + break // cannot continue + } + // i < len(fields) + fld := fields[i] + if !fld.Exported() && fld.pkg != check.pkg { + check.errorf(x.pos(), "implicit assignment to unexported field %s in %s literal", fld.name, typ) + continue + } + etyp := fld.typ + if !check.assignment(x, etyp) { + if x.mode != invalid { + check.errorf(x.pos(), "cannot use %s as %s value in struct literal", x, etyp) + } + continue + } + } + if len(e.Elts) < len(fields) { + check.error(e.Rbrace, "too few values in struct literal") + // ok to continue + } + } + + case *Array: + n := check.indexedElts(e.Elts, utyp.elem, utyp.len) + // if we have an "open" [...]T array, set the length now that we know it + if openArray { + utyp.len = n + } + + case *Slice: + check.indexedElts(e.Elts, utyp.elem, -1) + + case *Map: + visited := make(map[interface{}][]Type, len(e.Elts)) + for _, e := range e.Elts { + kv, _ := e.(*ast.KeyValueExpr) + if kv == nil { + check.error(e.Pos(), "missing key in map literal") + continue + } + check.exprWithHint(x, kv.Key, utyp.key) + if !check.assignment(x, utyp.key) { + if x.mode != invalid { + check.errorf(x.pos(), "cannot use %s as %s key in map literal", x, utyp.key) + } + continue + } + if x.mode == constant { + duplicate := false + // if the key is of interface type, the type is also significant when checking for duplicates + if _, ok := utyp.key.Underlying().(*Interface); ok { + for _, vtyp := range visited[x.val] { + if Identical(vtyp, x.typ) { + duplicate = true + break + } + } + visited[x.val] = append(visited[x.val], x.typ) + } else { + _, duplicate = visited[x.val] + visited[x.val] = nil + } + if duplicate { + check.errorf(x.pos(), "duplicate key %s in map literal", x.val) + continue + } + } + check.exprWithHint(x, kv.Value, utyp.elem) + if !check.assignment(x, utyp.elem) { + if x.mode != invalid { + check.errorf(x.pos(), "cannot use %s as %s value in map literal", x, utyp.elem) + } + continue + } + } + + default: + // if utyp is invalid, an error was reported before + if utyp != Typ[Invalid] { + check.errorf(e.Pos(), "invalid composite literal type %s", typ) + goto Error + } + } + + x.mode = value + x.typ = typ + + case *ast.ParenExpr: + kind := check.rawExpr(x, e.X, nil) + x.expr = e + return kind + + case *ast.SelectorExpr: + check.selector(x, e) + + case *ast.IndexExpr: + check.expr(x, e.X) + if x.mode == invalid { + goto Error + } + + valid := false + length := int64(-1) // valid if >= 0 + switch typ := x.typ.Underlying().(type) { + case *Basic: + if isString(typ) { + valid = true + if x.mode == constant { + length = int64(len(exact.StringVal(x.val))) + } + // an indexed string always yields a byte value + // (not a constant) even if the string and the + // index are constant + x.mode = value + x.typ = universeByte // use 'byte' name + } + + case *Array: + valid = true + length = typ.len + if x.mode != variable { + x.mode = value + } + x.typ = typ.elem + + case *Pointer: + if typ, _ := typ.base.Underlying().(*Array); typ != nil { + valid = true + length = typ.len + x.mode = variable + x.typ = typ.elem + } + + case *Slice: + valid = true + x.mode = variable + x.typ = typ.elem + + case *Map: + var key operand + check.expr(&key, e.Index) + if !check.assignment(&key, typ.key) { + if key.mode != invalid { + check.invalidOp(key.pos(), "cannot use %s as map index of type %s", &key, typ.key) + } + goto Error + } + x.mode = mapindex + x.typ = typ.elem + x.expr = e + return expression + } + + if !valid { + check.invalidOp(x.pos(), "cannot index %s", x) + goto Error + } + + if e.Index == nil { + check.invalidAST(e.Pos(), "missing index for %s", x) + goto Error + } + + check.index(e.Index, length) + // ok to continue + + case *ast.SliceExpr: + check.expr(x, e.X) + if x.mode == invalid { + goto Error + } + + valid := false + length := int64(-1) // valid if >= 0 + switch typ := x.typ.Underlying().(type) { + case *Basic: + if isString(typ) { + if slice3(e) { + check.invalidOp(x.pos(), "3-index slice of string") + goto Error + } + valid = true + if x.mode == constant { + length = int64(len(exact.StringVal(x.val))) + } + // spec: "For untyped string operands the result + // is a non-constant value of type string." + if typ.kind == UntypedString { + x.typ = Typ[String] + } + } + + case *Array: + valid = true + length = typ.len + if x.mode != variable { + check.invalidOp(x.pos(), "cannot slice %s (value not addressable)", x) + goto Error + } + x.typ = &Slice{elem: typ.elem} + + case *Pointer: + if typ, _ := typ.base.Underlying().(*Array); typ != nil { + valid = true + length = typ.len + x.typ = &Slice{elem: typ.elem} + } + + case *Slice: + valid = true + // x.typ doesn't change + } + + if !valid { + check.invalidOp(x.pos(), "cannot slice %s", x) + goto Error + } + + x.mode = value + + // spec: "Only the first index may be omitted; it defaults to 0." + if slice3(e) && (e.High == nil || sliceMax(e) == nil) { + check.error(e.Rbrack, "2nd and 3rd index required in 3-index slice") + goto Error + } + + // check indices + var ind [3]int64 + for i, expr := range []ast.Expr{e.Low, e.High, sliceMax(e)} { + x := int64(-1) + switch { + case expr != nil: + // The "capacity" is only known statically for strings, arrays, + // and pointers to arrays, and it is the same as the length for + // those types. + max := int64(-1) + if length >= 0 { + max = length + 1 + } + if t, ok := check.index(expr, max); ok && t >= 0 { + x = t + } + case i == 0: + // default is 0 for the first index + x = 0 + case length >= 0: + // default is length (== capacity) otherwise + x = length + } + ind[i] = x + } + + // constant indices must be in range + // (check.index already checks that existing indices >= 0) + L: + for i, x := range ind[:len(ind)-1] { + if x > 0 { + for _, y := range ind[i+1:] { + if y >= 0 && x > y { + check.errorf(e.Rbrack, "invalid slice indices: %d > %d", x, y) + break L // only report one error, ok to continue + } + } + } + } + + case *ast.TypeAssertExpr: + check.expr(x, e.X) + if x.mode == invalid { + goto Error + } + xtyp, _ := x.typ.Underlying().(*Interface) + if xtyp == nil { + check.invalidOp(x.pos(), "%s is not an interface", x) + goto Error + } + // x.(type) expressions are handled explicitly in type switches + if e.Type == nil { + check.invalidAST(e.Pos(), "use of .(type) outside type switch") + goto Error + } + T := check.typ(e.Type) + if T == Typ[Invalid] { + goto Error + } + check.typeAssertion(x.pos(), x, xtyp, T) + x.mode = commaok + x.typ = T + + case *ast.CallExpr: + return check.call(x, e) + + case *ast.StarExpr: + check.exprOrType(x, e.X) + switch x.mode { + case invalid: + goto Error + case typexpr: + x.typ = &Pointer{base: x.typ} + default: + if typ, ok := x.typ.Underlying().(*Pointer); ok { + x.mode = variable + x.typ = typ.base + } else { + check.invalidOp(x.pos(), "cannot indirect %s", x) + goto Error + } + } + + case *ast.UnaryExpr: + check.expr(x, e.X) + if x.mode == invalid { + goto Error + } + check.unary(x, e, e.Op) + if x.mode == invalid { + goto Error + } + if e.Op == token.ARROW { + x.expr = e + return statement // receive operations may appear in statement context + } + + case *ast.BinaryExpr: + check.binary(x, e, e.X, e.Y, e.Op) + if x.mode == invalid { + goto Error + } + + case *ast.KeyValueExpr: + // key:value expressions are handled in composite literals + check.invalidAST(e.Pos(), "no key:value expected") + goto Error + + case *ast.ArrayType, *ast.StructType, *ast.FuncType, + *ast.InterfaceType, *ast.MapType, *ast.ChanType: + x.mode = typexpr + x.typ = check.typ(e) + // Note: rawExpr (caller of exprInternal) will call check.recordTypeAndValue + // even though check.typ has already called it. This is fine as both + // times the same expression and type are recorded. It is also not a + // performance issue because we only reach here for composite literal + // types, which are comparatively rare. + + default: + panic(fmt.Sprintf("%s: unknown expression type %T", check.fset.Position(e.Pos()), e)) + } + + // everything went well + x.expr = e + return expression + +Error: + x.mode = invalid + x.expr = e + return statement // avoid follow-up errors +} + +// typeAssertion checks that x.(T) is legal; xtyp must be the type of x. +func (check *Checker) typeAssertion(pos token.Pos, x *operand, xtyp *Interface, T Type) { + method, wrongType := assertableTo(xtyp, T) + if method == nil { + return + } + + var msg string + if wrongType { + msg = "wrong type for method" + } else { + msg = "missing method" + } + check.errorf(pos, "%s cannot have dynamic type %s (%s %s)", x, T, msg, method.name) +} + +// expr typechecks expression e and initializes x with the expression value. +// If an error occurred, x.mode is set to invalid. +// +func (check *Checker) expr(x *operand, e ast.Expr) { + check.rawExpr(x, e, nil) + var msg string + switch x.mode { + default: + return + case novalue: + msg = "used as value" + case builtin: + msg = "must be called" + case typexpr: + msg = "is not an expression" + } + check.errorf(x.pos(), "%s %s", x, msg) + x.mode = invalid +} + +// exprWithHint typechecks expression e and initializes x with the expression value. +// If an error occurred, x.mode is set to invalid. +// If hint != nil, it is the type of a composite literal element. +// +func (check *Checker) exprWithHint(x *operand, e ast.Expr, hint Type) { + assert(hint != nil) + check.rawExpr(x, e, hint) + var msg string + switch x.mode { + default: + return + case novalue: + msg = "used as value" + case builtin: + msg = "must be called" + case typexpr: + msg = "is not an expression" + } + check.errorf(x.pos(), "%s %s", x, msg) + x.mode = invalid +} + +// exprOrType typechecks expression or type e and initializes x with the expression value or type. +// If an error occurred, x.mode is set to invalid. +// +func (check *Checker) exprOrType(x *operand, e ast.Expr) { + check.rawExpr(x, e, nil) + if x.mode == novalue { + check.errorf(x.pos(), "%s used as value or type", x) + x.mode = invalid + } +} diff --git a/vendor/golang.org/x/tools/go/types/exprstring.go b/vendor/golang.org/x/tools/go/types/exprstring.go new file mode 100644 index 0000000..370bdf3 --- /dev/null +++ b/vendor/golang.org/x/tools/go/types/exprstring.go @@ -0,0 +1,220 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// This file implements printing of expressions. + +package types + +import ( + "bytes" + "go/ast" +) + +// ExprString returns the (possibly simplified) string representation for x. +func ExprString(x ast.Expr) string { + var buf bytes.Buffer + WriteExpr(&buf, x) + return buf.String() +} + +// WriteExpr writes the (possibly simplified) string representation for x to buf. +func WriteExpr(buf *bytes.Buffer, x ast.Expr) { + // The AST preserves source-level parentheses so there is + // no need to introduce them here to correct for different + // operator precedences. (This assumes that the AST was + // generated by a Go parser.) + + switch x := x.(type) { + default: + buf.WriteString("(bad expr)") // nil, ast.BadExpr, ast.KeyValueExpr + + case *ast.Ident: + buf.WriteString(x.Name) + + case *ast.Ellipsis: + buf.WriteString("...") + if x.Elt != nil { + WriteExpr(buf, x.Elt) + } + + case *ast.BasicLit: + buf.WriteString(x.Value) + + case *ast.FuncLit: + buf.WriteByte('(') + WriteExpr(buf, x.Type) + buf.WriteString(" literal)") // simplified + + case *ast.CompositeLit: + buf.WriteByte('(') + WriteExpr(buf, x.Type) + buf.WriteString(" literal)") // simplified + + case *ast.ParenExpr: + buf.WriteByte('(') + WriteExpr(buf, x.X) + buf.WriteByte(')') + + case *ast.SelectorExpr: + WriteExpr(buf, x.X) + buf.WriteByte('.') + buf.WriteString(x.Sel.Name) + + case *ast.IndexExpr: + WriteExpr(buf, x.X) + buf.WriteByte('[') + WriteExpr(buf, x.Index) + buf.WriteByte(']') + + case *ast.SliceExpr: + WriteExpr(buf, x.X) + buf.WriteByte('[') + if x.Low != nil { + WriteExpr(buf, x.Low) + } + buf.WriteByte(':') + if x.High != nil { + WriteExpr(buf, x.High) + } + if x.Slice3 { + buf.WriteByte(':') + if x.Max != nil { + WriteExpr(buf, x.Max) + } + } + buf.WriteByte(']') + + case *ast.TypeAssertExpr: + WriteExpr(buf, x.X) + buf.WriteString(".(") + WriteExpr(buf, x.Type) + buf.WriteByte(')') + + case *ast.CallExpr: + WriteExpr(buf, x.Fun) + buf.WriteByte('(') + for i, arg := range x.Args { + if i > 0 { + buf.WriteString(", ") + } + WriteExpr(buf, arg) + } + if x.Ellipsis.IsValid() { + buf.WriteString("...") + } + buf.WriteByte(')') + + case *ast.StarExpr: + buf.WriteByte('*') + WriteExpr(buf, x.X) + + case *ast.UnaryExpr: + buf.WriteString(x.Op.String()) + WriteExpr(buf, x.X) + + case *ast.BinaryExpr: + WriteExpr(buf, x.X) + buf.WriteByte(' ') + buf.WriteString(x.Op.String()) + buf.WriteByte(' ') + WriteExpr(buf, x.Y) + + case *ast.ArrayType: + buf.WriteByte('[') + if x.Len != nil { + WriteExpr(buf, x.Len) + } + buf.WriteByte(']') + WriteExpr(buf, x.Elt) + + case *ast.StructType: + buf.WriteString("struct{") + writeFieldList(buf, x.Fields, "; ", false) + buf.WriteByte('}') + + case *ast.FuncType: + buf.WriteString("func") + writeSigExpr(buf, x) + + case *ast.InterfaceType: + buf.WriteString("interface{") + writeFieldList(buf, x.Methods, "; ", true) + buf.WriteByte('}') + + case *ast.MapType: + buf.WriteString("map[") + WriteExpr(buf, x.Key) + buf.WriteByte(']') + WriteExpr(buf, x.Value) + + case *ast.ChanType: + var s string + switch x.Dir { + case ast.SEND: + s = "chan<- " + case ast.RECV: + s = "<-chan " + default: + s = "chan " + } + buf.WriteString(s) + WriteExpr(buf, x.Value) + } +} + +func writeSigExpr(buf *bytes.Buffer, sig *ast.FuncType) { + buf.WriteByte('(') + writeFieldList(buf, sig.Params, ", ", false) + buf.WriteByte(')') + + res := sig.Results + n := res.NumFields() + if n == 0 { + // no result + return + } + + buf.WriteByte(' ') + if n == 1 && len(res.List[0].Names) == 0 { + // single unnamed result + WriteExpr(buf, res.List[0].Type) + return + } + + // multiple or named result(s) + buf.WriteByte('(') + writeFieldList(buf, res, ", ", false) + buf.WriteByte(')') +} + +func writeFieldList(buf *bytes.Buffer, fields *ast.FieldList, sep string, iface bool) { + for i, f := range fields.List { + if i > 0 { + buf.WriteString(sep) + } + + // field list names + for i, name := range f.Names { + if i > 0 { + buf.WriteString(", ") + } + buf.WriteString(name.Name) + } + + // types of interface methods consist of signatures only + if sig, _ := f.Type.(*ast.FuncType); sig != nil && iface { + writeSigExpr(buf, sig) + continue + } + + // named fields are separated with a blank from the field type + if len(f.Names) > 0 { + buf.WriteByte(' ') + } + + WriteExpr(buf, f.Type) + + // ignore tag + } +} diff --git a/vendor/golang.org/x/tools/go/types/go11.go b/vendor/golang.org/x/tools/go/types/go11.go new file mode 100644 index 0000000..cf41cab --- /dev/null +++ b/vendor/golang.org/x/tools/go/types/go11.go @@ -0,0 +1,17 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// +build !go1.2 + +package types + +import "go/ast" + +func slice3(x *ast.SliceExpr) bool { + return false +} + +func sliceMax(x *ast.SliceExpr) ast.Expr { + return nil +} diff --git a/vendor/golang.org/x/tools/go/types/go12.go b/vendor/golang.org/x/tools/go/types/go12.go new file mode 100644 index 0000000..2017442 --- /dev/null +++ b/vendor/golang.org/x/tools/go/types/go12.go @@ -0,0 +1,17 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// +build go1.2 + +package types + +import "go/ast" + +func slice3(x *ast.SliceExpr) bool { + return x.Slice3 +} + +func sliceMax(x *ast.SliceExpr) ast.Expr { + return x.Max +} diff --git a/vendor/golang.org/x/tools/go/types/initorder.go b/vendor/golang.org/x/tools/go/types/initorder.go new file mode 100644 index 0000000..0fd567b --- /dev/null +++ b/vendor/golang.org/x/tools/go/types/initorder.go @@ -0,0 +1,222 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package types + +import ( + "container/heap" + "fmt" +) + +// initOrder computes the Info.InitOrder for package variables. +func (check *Checker) initOrder() { + // An InitOrder may already have been computed if a package is + // built from several calls to (*Checker).Files. Clear it. + check.Info.InitOrder = check.Info.InitOrder[:0] + + // compute the object dependency graph and + // initialize a priority queue with the list + // of graph nodes + pq := nodeQueue(dependencyGraph(check.objMap)) + heap.Init(&pq) + + const debug = false + if debug { + fmt.Printf("package %s: object dependency graph\n", check.pkg.Name()) + for _, n := range pq { + for _, o := range n.out { + fmt.Printf("\t%s -> %s\n", n.obj.Name(), o.obj.Name()) + } + } + fmt.Println() + fmt.Printf("package %s: initialization order\n", check.pkg.Name()) + } + + // determine initialization order by removing the highest priority node + // (the one with the fewest dependencies) and its edges from the graph, + // repeatedly, until there are no nodes left. + // In a valid Go program, those nodes always have zero dependencies (after + // removing all incoming dependencies), otherwise there are initialization + // cycles. + mark := 0 + emitted := make(map[*declInfo]bool) + for len(pq) > 0 { + // get the next node + n := heap.Pop(&pq).(*objNode) + + // if n still depends on other nodes, we have a cycle + if n.in > 0 { + mark++ // mark nodes using a different value each time + cycle := findPath(n, n, mark) + if i := valIndex(cycle); i >= 0 { + check.reportCycle(cycle, i) + } + // ok to continue, but the variable initialization order + // will be incorrect at this point since it assumes no + // cycle errors + } + + // reduce dependency count of all dependent nodes + // and update priority queue + for _, out := range n.out { + out.in-- + heap.Fix(&pq, out.index) + } + + // record the init order for variables with initializers only + v, _ := n.obj.(*Var) + info := check.objMap[v] + if v == nil || !info.hasInitializer() { + continue + } + + // n:1 variable declarations such as: a, b = f() + // introduce a node for each lhs variable (here: a, b); + // but they all have the same initializer - emit only + // one, for the first variable seen + if emitted[info] { + continue // initializer already emitted, if any + } + emitted[info] = true + + infoLhs := info.lhs // possibly nil (see declInfo.lhs field comment) + if infoLhs == nil { + infoLhs = []*Var{v} + } + init := &Initializer{infoLhs, info.init} + check.Info.InitOrder = append(check.Info.InitOrder, init) + + if debug { + fmt.Printf("\t%s\n", init) + } + } + + if debug { + fmt.Println() + } +} + +// findPath returns the (reversed) list of nodes z, ... c, b, a, +// such that there is a path (list of edges) from a to z. +// If there is no such path, the result is nil. +// Nodes marked with the value mark are considered "visited"; +// unvisited nodes are marked during the graph search. +func findPath(a, z *objNode, mark int) []*objNode { + if a.mark == mark { + return nil // node already seen + } + a.mark = mark + + for _, n := range a.out { + if n == z { + return []*objNode{z} + } + if P := findPath(n, z, mark); P != nil { + return append(P, n) + } + } + + return nil +} + +// valIndex returns the index of the first constant or variable in a, +// if any; or a value < 0. +func valIndex(a []*objNode) int { + for i, n := range a { + switch n.obj.(type) { + case *Const, *Var: + return i + } + } + return -1 +} + +// reportCycle reports an error for the cycle starting at i. +func (check *Checker) reportCycle(cycle []*objNode, i int) { + obj := cycle[i].obj + check.errorf(obj.Pos(), "initialization cycle for %s", obj.Name()) + // print cycle + for _ = range cycle { + check.errorf(obj.Pos(), "\t%s refers to", obj.Name()) // secondary error, \t indented + i++ + if i >= len(cycle) { + i = 0 + } + obj = cycle[i].obj + } + check.errorf(obj.Pos(), "\t%s", obj.Name()) +} + +// An objNode represents a node in the object dependency graph. +// Each node b in a.out represents an edge a->b indicating that +// b depends on a. +// Nodes may be marked for cycle detection. A node n is marked +// if n.mark corresponds to the current mark value. +type objNode struct { + obj Object // object represented by this node + in int // number of nodes this node depends on + out []*objNode // list of nodes that depend on this node + index int // node index in list of nodes + mark int // for cycle detection +} + +// dependencyGraph computes the transposed object dependency graph +// from the given objMap. The transposed graph is returned as a list +// of nodes; an edge d->n indicates that node n depends on node d. +func dependencyGraph(objMap map[Object]*declInfo) []*objNode { + // M maps each object to its corresponding node + M := make(map[Object]*objNode, len(objMap)) + for obj := range objMap { + M[obj] = &objNode{obj: obj} + } + + // G is the graph of nodes n + G := make([]*objNode, len(M)) + i := 0 + for obj, n := range M { + deps := objMap[obj].deps + n.in = len(deps) + for d := range deps { + d := M[d] // node n depends on node d + d.out = append(d.out, n) // add edge d->n + } + + G[i] = n + n.index = i + i++ + } + + return G +} + +// nodeQueue implements the container/heap interface; +// a nodeQueue may be used as a priority queue. +type nodeQueue []*objNode + +func (a nodeQueue) Len() int { return len(a) } + +func (a nodeQueue) Swap(i, j int) { + x, y := a[i], a[j] + a[i], a[j] = y, x + x.index, y.index = j, i +} + +func (a nodeQueue) Less(i, j int) bool { + x, y := a[i], a[j] + // nodes are prioritized by number of incoming dependencies (1st key) + // and source order (2nd key) + return x.in < y.in || x.in == y.in && x.obj.order() < y.obj.order() +} + +func (a *nodeQueue) Push(x interface{}) { + panic("unreachable") +} + +func (a *nodeQueue) Pop() interface{} { + n := len(*a) + x := (*a)[n-1] + x.index = -1 // for safety + *a = (*a)[:n-1] + return x +} diff --git a/vendor/golang.org/x/tools/go/types/labels.go b/vendor/golang.org/x/tools/go/types/labels.go new file mode 100644 index 0000000..7364d4d --- /dev/null +++ b/vendor/golang.org/x/tools/go/types/labels.go @@ -0,0 +1,268 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package types + +import ( + "go/ast" + "go/token" +) + +// labels checks correct label use in body. +func (check *Checker) labels(body *ast.BlockStmt) { + // set of all labels in this body + all := NewScope(nil, body.Pos(), body.End(), "label") + + fwdJumps := check.blockBranches(all, nil, nil, body.List) + + // If there are any forward jumps left, no label was found for + // the corresponding goto statements. Either those labels were + // never defined, or they are inside blocks and not reachable + // for the respective gotos. + for _, jmp := range fwdJumps { + var msg string + name := jmp.Label.Name + if alt := all.Lookup(name); alt != nil { + msg = "goto %s jumps into block" + alt.(*Label).used = true // avoid another error + } else { + msg = "label %s not declared" + } + check.errorf(jmp.Label.Pos(), msg, name) + } + + // spec: "It is illegal to define a label that is never used." + for _, obj := range all.elems { + if lbl := obj.(*Label); !lbl.used { + check.softErrorf(lbl.pos, "label %s declared but not used", lbl.name) + } + } +} + +// A block tracks label declarations in a block and its enclosing blocks. +type block struct { + parent *block // enclosing block + lstmt *ast.LabeledStmt // labeled statement to which this block belongs, or nil + labels map[string]*ast.LabeledStmt // allocated lazily +} + +// insert records a new label declaration for the current block. +// The label must not have been declared before in any block. +func (b *block) insert(s *ast.LabeledStmt) { + name := s.Label.Name + if debug { + assert(b.gotoTarget(name) == nil) + } + labels := b.labels + if labels == nil { + labels = make(map[string]*ast.LabeledStmt) + b.labels = labels + } + labels[name] = s +} + +// gotoTarget returns the labeled statement in the current +// or an enclosing block with the given label name, or nil. +func (b *block) gotoTarget(name string) *ast.LabeledStmt { + for s := b; s != nil; s = s.parent { + if t := s.labels[name]; t != nil { + return t + } + } + return nil +} + +// enclosingTarget returns the innermost enclosing labeled +// statement with the given label name, or nil. +func (b *block) enclosingTarget(name string) *ast.LabeledStmt { + for s := b; s != nil; s = s.parent { + if t := s.lstmt; t != nil && t.Label.Name == name { + return t + } + } + return nil +} + +// blockBranches processes a block's statement list and returns the set of outgoing forward jumps. +// all is the scope of all declared labels, parent the set of labels declared in the immediately +// enclosing block, and lstmt is the labeled statement this block is associated with (or nil). +func (check *Checker) blockBranches(all *Scope, parent *block, lstmt *ast.LabeledStmt, list []ast.Stmt) []*ast.BranchStmt { + b := &block{parent: parent, lstmt: lstmt} + + var ( + varDeclPos token.Pos + fwdJumps, badJumps []*ast.BranchStmt + ) + + // All forward jumps jumping over a variable declaration are possibly + // invalid (they may still jump out of the block and be ok). + // recordVarDecl records them for the given position. + recordVarDecl := func(pos token.Pos) { + varDeclPos = pos + badJumps = append(badJumps[:0], fwdJumps...) // copy fwdJumps to badJumps + } + + jumpsOverVarDecl := func(jmp *ast.BranchStmt) bool { + if varDeclPos.IsValid() { + for _, bad := range badJumps { + if jmp == bad { + return true + } + } + } + return false + } + + blockBranches := func(lstmt *ast.LabeledStmt, list []ast.Stmt) { + // Unresolved forward jumps inside the nested block + // become forward jumps in the current block. + fwdJumps = append(fwdJumps, check.blockBranches(all, b, lstmt, list)...) + } + + var stmtBranches func(ast.Stmt) + stmtBranches = func(s ast.Stmt) { + switch s := s.(type) { + case *ast.DeclStmt: + if d, _ := s.Decl.(*ast.GenDecl); d != nil && d.Tok == token.VAR { + recordVarDecl(d.Pos()) + } + + case *ast.LabeledStmt: + // declare non-blank label + if name := s.Label.Name; name != "_" { + lbl := NewLabel(s.Label.Pos(), check.pkg, name) + if alt := all.Insert(lbl); alt != nil { + check.softErrorf(lbl.pos, "label %s already declared", name) + check.reportAltDecl(alt) + // ok to continue + } else { + b.insert(s) + check.recordDef(s.Label, lbl) + } + // resolve matching forward jumps and remove them from fwdJumps + i := 0 + for _, jmp := range fwdJumps { + if jmp.Label.Name == name { + // match + lbl.used = true + check.recordUse(jmp.Label, lbl) + if jumpsOverVarDecl(jmp) { + check.softErrorf( + jmp.Label.Pos(), + "goto %s jumps over variable declaration at line %d", + name, + check.fset.Position(varDeclPos).Line, + ) + // ok to continue + } + } else { + // no match - record new forward jump + fwdJumps[i] = jmp + i++ + } + } + fwdJumps = fwdJumps[:i] + lstmt = s + } + stmtBranches(s.Stmt) + + case *ast.BranchStmt: + if s.Label == nil { + return // checked in 1st pass (check.stmt) + } + + // determine and validate target + name := s.Label.Name + switch s.Tok { + case token.BREAK: + // spec: "If there is a label, it must be that of an enclosing + // "for", "switch", or "select" statement, and that is the one + // whose execution terminates." + valid := false + if t := b.enclosingTarget(name); t != nil { + switch t.Stmt.(type) { + case *ast.SwitchStmt, *ast.TypeSwitchStmt, *ast.SelectStmt, *ast.ForStmt, *ast.RangeStmt: + valid = true + } + } + if !valid { + check.errorf(s.Label.Pos(), "invalid break label %s", name) + return + } + + case token.CONTINUE: + // spec: "If there is a label, it must be that of an enclosing + // "for" statement, and that is the one whose execution advances." + valid := false + if t := b.enclosingTarget(name); t != nil { + switch t.Stmt.(type) { + case *ast.ForStmt, *ast.RangeStmt: + valid = true + } + } + if !valid { + check.errorf(s.Label.Pos(), "invalid continue label %s", name) + return + } + + case token.GOTO: + if b.gotoTarget(name) == nil { + // label may be declared later - add branch to forward jumps + fwdJumps = append(fwdJumps, s) + return + } + + default: + check.invalidAST(s.Pos(), "branch statement: %s %s", s.Tok, name) + return + } + + // record label use + obj := all.Lookup(name) + obj.(*Label).used = true + check.recordUse(s.Label, obj) + + case *ast.AssignStmt: + if s.Tok == token.DEFINE { + recordVarDecl(s.Pos()) + } + + case *ast.BlockStmt: + blockBranches(lstmt, s.List) + + case *ast.IfStmt: + stmtBranches(s.Body) + if s.Else != nil { + stmtBranches(s.Else) + } + + case *ast.CaseClause: + blockBranches(nil, s.Body) + + case *ast.SwitchStmt: + stmtBranches(s.Body) + + case *ast.TypeSwitchStmt: + stmtBranches(s.Body) + + case *ast.CommClause: + blockBranches(nil, s.Body) + + case *ast.SelectStmt: + stmtBranches(s.Body) + + case *ast.ForStmt: + stmtBranches(s.Body) + + case *ast.RangeStmt: + stmtBranches(s.Body) + } + } + + for _, s := range list { + stmtBranches(s) + } + + return fwdJumps +} diff --git a/vendor/golang.org/x/tools/go/types/lookup.go b/vendor/golang.org/x/tools/go/types/lookup.go new file mode 100644 index 0000000..3caca55 --- /dev/null +++ b/vendor/golang.org/x/tools/go/types/lookup.go @@ -0,0 +1,341 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// This file implements various field and method lookup functions. + +package types + +// LookupFieldOrMethod looks up a field or method with given package and name +// in T and returns the corresponding *Var or *Func, an index sequence, and a +// bool indicating if there were any pointer indirections on the path to the +// field or method. If addressable is set, T is the type of an addressable +// variable (only matters for method lookups). +// +// The last index entry is the field or method index in the (possibly embedded) +// type where the entry was found, either: +// +// 1) the list of declared methods of a named type; or +// 2) the list of all methods (method set) of an interface type; or +// 3) the list of fields of a struct type. +// +// The earlier index entries are the indices of the anonymous struct fields +// traversed to get to the found entry, starting at depth 0. +// +// If no entry is found, a nil object is returned. In this case, the returned +// index and indirect values have the following meaning: +// +// - If index != nil, the index sequence points to an ambiguous entry +// (the same name appeared more than once at the same embedding level). +// +// - If indirect is set, a method with a pointer receiver type was found +// but there was no pointer on the path from the actual receiver type to +// the method's formal receiver base type, nor was the receiver addressable. +// +func LookupFieldOrMethod(T Type, addressable bool, pkg *Package, name string) (obj Object, index []int, indirect bool) { + // Methods cannot be associated to a named pointer type + // (spec: "The type denoted by T is called the receiver base type; + // it must not be a pointer or interface type and it must be declared + // in the same package as the method."). + // Thus, if we have a named pointer type, proceed with the underlying + // pointer type but discard the result if it is a method since we would + // not have found it for T (see also issue 8590). + if t, _ := T.(*Named); t != nil { + if p, _ := t.underlying.(*Pointer); p != nil { + obj, index, indirect = lookupFieldOrMethod(p, false, pkg, name) + if _, ok := obj.(*Func); ok { + return nil, nil, false + } + return + } + } + + return lookupFieldOrMethod(T, addressable, pkg, name) +} + +// TODO(gri) The named type consolidation and seen maps below must be +// indexed by unique keys for a given type. Verify that named +// types always have only one representation (even when imported +// indirectly via different packages.) + +func lookupFieldOrMethod(T Type, addressable bool, pkg *Package, name string) (obj Object, index []int, indirect bool) { + // WARNING: The code in this function is extremely subtle - do not modify casually! + // This function and NewMethodSet should be kept in sync. + + if name == "_" { + return // blank fields/methods are never found + } + + typ, isPtr := deref(T) + named, _ := typ.(*Named) + + // *typ where typ is an interface has no methods. + if isPtr { + utyp := typ + if named != nil { + utyp = named.underlying + } + if _, ok := utyp.(*Interface); ok { + return + } + } + + // Start with typ as single entry at shallowest depth. + // If typ is not a named type, insert a nil type instead. + current := []embeddedType{{named, nil, isPtr, false}} + + // named types that we have seen already, allocated lazily + var seen map[*Named]bool + + // search current depth + for len(current) > 0 { + var next []embeddedType // embedded types found at current depth + + // look for (pkg, name) in all types at current depth + for _, e := range current { + // The very first time only, e.typ may be nil. + // In this case, we don't have a named type and + // we simply continue with the underlying type. + if e.typ != nil { + if seen[e.typ] { + // We have seen this type before, at a more shallow depth + // (note that multiples of this type at the current depth + // were consolidated before). The type at that depth shadows + // this same type at the current depth, so we can ignore + // this one. + continue + } + if seen == nil { + seen = make(map[*Named]bool) + } + seen[e.typ] = true + + // look for a matching attached method + if i, m := lookupMethod(e.typ.methods, pkg, name); m != nil { + // potential match + assert(m.typ != nil) + index = concat(e.index, i) + if obj != nil || e.multiples { + return nil, index, false // collision + } + obj = m + indirect = e.indirect + continue // we can't have a matching field or interface method + } + + // continue with underlying type + typ = e.typ.underlying + } + + switch t := typ.(type) { + case *Struct: + // look for a matching field and collect embedded types + for i, f := range t.fields { + if f.sameId(pkg, name) { + assert(f.typ != nil) + index = concat(e.index, i) + if obj != nil || e.multiples { + return nil, index, false // collision + } + obj = f + indirect = e.indirect + continue // we can't have a matching interface method + } + // Collect embedded struct fields for searching the next + // lower depth, but only if we have not seen a match yet + // (if we have a match it is either the desired field or + // we have a name collision on the same depth; in either + // case we don't need to look further). + // Embedded fields are always of the form T or *T where + // T is a named type. If e.typ appeared multiple times at + // this depth, f.typ appears multiple times at the next + // depth. + if obj == nil && f.anonymous { + // Ignore embedded basic types - only user-defined + // named types can have methods or struct fields. + typ, isPtr := deref(f.typ) + if t, _ := typ.(*Named); t != nil { + next = append(next, embeddedType{t, concat(e.index, i), e.indirect || isPtr, e.multiples}) + } + } + } + + case *Interface: + // look for a matching method + // TODO(gri) t.allMethods is sorted - use binary search + if i, m := lookupMethod(t.allMethods, pkg, name); m != nil { + assert(m.typ != nil) + index = concat(e.index, i) + if obj != nil || e.multiples { + return nil, index, false // collision + } + obj = m + indirect = e.indirect + } + } + } + + if obj != nil { + // found a potential match + // spec: "A method call x.m() is valid if the method set of (the type of) x + // contains m and the argument list can be assigned to the parameter + // list of m. If x is addressable and &x's method set contains m, x.m() + // is shorthand for (&x).m()". + if f, _ := obj.(*Func); f != nil && ptrRecv(f) && !indirect && !addressable { + return nil, nil, true // pointer/addressable receiver required + } + return + } + + current = consolidateMultiples(next) + } + + return nil, nil, false // not found +} + +// embeddedType represents an embedded named type +type embeddedType struct { + typ *Named // nil means use the outer typ variable instead + index []int // embedded field indices, starting with index at depth 0 + indirect bool // if set, there was a pointer indirection on the path to this field + multiples bool // if set, typ appears multiple times at this depth +} + +// consolidateMultiples collects multiple list entries with the same type +// into a single entry marked as containing multiples. The result is the +// consolidated list. +func consolidateMultiples(list []embeddedType) []embeddedType { + if len(list) <= 1 { + return list // at most one entry - nothing to do + } + + n := 0 // number of entries w/ unique type + prev := make(map[*Named]int) // index at which type was previously seen + for _, e := range list { + if i, found := prev[e.typ]; found { + list[i].multiples = true + // ignore this entry + } else { + prev[e.typ] = n + list[n] = e + n++ + } + } + return list[:n] +} + +// MissingMethod returns (nil, false) if V implements T, otherwise it +// returns a missing method required by T and whether it is missing or +// just has the wrong type. +// +// For non-interface types V, or if static is set, V implements T if all +// methods of T are present in V. Otherwise (V is an interface and static +// is not set), MissingMethod only checks that methods of T which are also +// present in V have matching types (e.g., for a type assertion x.(T) where +// x is of interface type V). +// +func MissingMethod(V Type, T *Interface, static bool) (method *Func, wrongType bool) { + // fast path for common case + if T.Empty() { + return + } + + // TODO(gri) Consider using method sets here. Might be more efficient. + + if ityp, _ := V.Underlying().(*Interface); ityp != nil { + // TODO(gri) allMethods is sorted - can do this more efficiently + for _, m := range T.allMethods { + _, obj := lookupMethod(ityp.allMethods, m.pkg, m.name) + switch { + case obj == nil: + if static { + return m, false + } + case !Identical(obj.Type(), m.typ): + return m, true + } + } + return + } + + // A concrete type implements T if it implements all methods of T. + for _, m := range T.allMethods { + obj, _, _ := lookupFieldOrMethod(V, false, m.pkg, m.name) + + f, _ := obj.(*Func) + if f == nil { + return m, false + } + + if !Identical(f.typ, m.typ) { + return m, true + } + } + + return +} + +// assertableTo reports whether a value of type V can be asserted to have type T. +// It returns (nil, false) as affirmative answer. Otherwise it returns a missing +// method required by V and whether it is missing or just has the wrong type. +func assertableTo(V *Interface, T Type) (method *Func, wrongType bool) { + // no static check is required if T is an interface + // spec: "If T is an interface type, x.(T) asserts that the + // dynamic type of x implements the interface T." + if _, ok := T.Underlying().(*Interface); ok && !strict { + return + } + return MissingMethod(T, V, false) +} + +// deref dereferences typ if it is a *Pointer and returns its base and true. +// Otherwise it returns (typ, false). +func deref(typ Type) (Type, bool) { + if p, _ := typ.(*Pointer); p != nil { + return p.base, true + } + return typ, false +} + +// derefStructPtr dereferences typ if it is a (named or unnamed) pointer to a +// (named or unnamed) struct and returns its base. Otherwise it returns typ. +func derefStructPtr(typ Type) Type { + if p, _ := typ.Underlying().(*Pointer); p != nil { + if _, ok := p.base.Underlying().(*Struct); ok { + return p.base + } + } + return typ +} + +// concat returns the result of concatenating list and i. +// The result does not share its underlying array with list. +func concat(list []int, i int) []int { + var t []int + t = append(t, list...) + return append(t, i) +} + +// fieldIndex returns the index for the field with matching package and name, or a value < 0. +func fieldIndex(fields []*Var, pkg *Package, name string) int { + if name != "_" { + for i, f := range fields { + if f.sameId(pkg, name) { + return i + } + } + } + return -1 +} + +// lookupMethod returns the index of and method with matching package and name, or (-1, nil). +func lookupMethod(methods []*Func, pkg *Package, name string) (int, *Func) { + if name != "_" { + for i, m := range methods { + if m.sameId(pkg, name) { + return i, m + } + } + } + return -1, nil +} diff --git a/vendor/golang.org/x/tools/go/types/methodset.go b/vendor/golang.org/x/tools/go/types/methodset.go new file mode 100644 index 0000000..8aff6f9 --- /dev/null +++ b/vendor/golang.org/x/tools/go/types/methodset.go @@ -0,0 +1,271 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// This file implements method sets. + +package types + +import ( + "bytes" + "fmt" + "sort" +) + +// A MethodSet is an ordered set of concrete or abstract (interface) methods; +// a method is a MethodVal selection, and they are ordered by ascending m.Obj().Id(). +// The zero value for a MethodSet is a ready-to-use empty method set. +type MethodSet struct { + list []*Selection +} + +func (s *MethodSet) String() string { + if s.Len() == 0 { + return "MethodSet {}" + } + + var buf bytes.Buffer + fmt.Fprintln(&buf, "MethodSet {") + for _, f := range s.list { + fmt.Fprintf(&buf, "\t%s\n", f) + } + fmt.Fprintln(&buf, "}") + return buf.String() +} + +// Len returns the number of methods in s. +func (s *MethodSet) Len() int { return len(s.list) } + +// At returns the i'th method in s for 0 <= i < s.Len(). +func (s *MethodSet) At(i int) *Selection { return s.list[i] } + +// Lookup returns the method with matching package and name, or nil if not found. +func (s *MethodSet) Lookup(pkg *Package, name string) *Selection { + if s.Len() == 0 { + return nil + } + + key := Id(pkg, name) + i := sort.Search(len(s.list), func(i int) bool { + m := s.list[i] + return m.obj.Id() >= key + }) + if i < len(s.list) { + m := s.list[i] + if m.obj.Id() == key { + return m + } + } + return nil +} + +// Shared empty method set. +var emptyMethodSet MethodSet + +// NewMethodSet returns the method set for the given type T. It +// always returns a non-nil method set, even if it is empty. +// +// A MethodSetCache handles repeat queries more efficiently. +// +func NewMethodSet(T Type) *MethodSet { + // WARNING: The code in this function is extremely subtle - do not modify casually! + // This function and lookupFieldOrMethod should be kept in sync. + + // method set up to the current depth, allocated lazily + var base methodSet + + typ, isPtr := deref(T) + named, _ := typ.(*Named) + + // *typ where typ is an interface has no methods. + if isPtr { + utyp := typ + if named != nil { + utyp = named.underlying + } + if _, ok := utyp.(*Interface); ok { + return &emptyMethodSet + } + } + + // Start with typ as single entry at shallowest depth. + // If typ is not a named type, insert a nil type instead. + current := []embeddedType{{named, nil, isPtr, false}} + + // named types that we have seen already, allocated lazily + var seen map[*Named]bool + + // collect methods at current depth + for len(current) > 0 { + var next []embeddedType // embedded types found at current depth + + // field and method sets at current depth, allocated lazily + var fset fieldSet + var mset methodSet + + for _, e := range current { + // The very first time only, e.typ may be nil. + // In this case, we don't have a named type and + // we simply continue with the underlying type. + if e.typ != nil { + if seen[e.typ] { + // We have seen this type before, at a more shallow depth + // (note that multiples of this type at the current depth + // were consolidated before). The type at that depth shadows + // this same type at the current depth, so we can ignore + // this one. + continue + } + if seen == nil { + seen = make(map[*Named]bool) + } + seen[e.typ] = true + + mset = mset.add(e.typ.methods, e.index, e.indirect, e.multiples) + + // continue with underlying type + typ = e.typ.underlying + } + + switch t := typ.(type) { + case *Struct: + for i, f := range t.fields { + fset = fset.add(f, e.multiples) + + // Embedded fields are always of the form T or *T where + // T is a named type. If typ appeared multiple times at + // this depth, f.Type appears multiple times at the next + // depth. + if f.anonymous { + // Ignore embedded basic types - only user-defined + // named types can have methods or struct fields. + typ, isPtr := deref(f.typ) + if t, _ := typ.(*Named); t != nil { + next = append(next, embeddedType{t, concat(e.index, i), e.indirect || isPtr, e.multiples}) + } + } + } + + case *Interface: + mset = mset.add(t.allMethods, e.index, true, e.multiples) + } + } + + // Add methods and collisions at this depth to base if no entries with matching + // names exist already. + for k, m := range mset { + if _, found := base[k]; !found { + // Fields collide with methods of the same name at this depth. + if _, found := fset[k]; found { + m = nil // collision + } + if base == nil { + base = make(methodSet) + } + base[k] = m + } + } + + // Multiple fields with matching names collide at this depth and shadow all + // entries further down; add them as collisions to base if no entries with + // matching names exist already. + for k, f := range fset { + if f == nil { + if _, found := base[k]; !found { + if base == nil { + base = make(methodSet) + } + base[k] = nil // collision + } + } + } + + current = consolidateMultiples(next) + } + + if len(base) == 0 { + return &emptyMethodSet + } + + // collect methods + var list []*Selection + for _, m := range base { + if m != nil { + m.recv = T + list = append(list, m) + } + } + sort.Sort(byUniqueName(list)) + return &MethodSet{list} +} + +// A fieldSet is a set of fields and name collisions. +// A collision indicates that multiple fields with the +// same unique id appeared. +type fieldSet map[string]*Var // a nil entry indicates a name collision + +// Add adds field f to the field set s. +// If multiples is set, f appears multiple times +// and is treated as a collision. +func (s fieldSet) add(f *Var, multiples bool) fieldSet { + if s == nil { + s = make(fieldSet) + } + key := f.Id() + // if f is not in the set, add it + if !multiples { + if _, found := s[key]; !found { + s[key] = f + return s + } + } + s[key] = nil // collision + return s +} + +// A methodSet is a set of methods and name collisions. +// A collision indicates that multiple methods with the +// same unique id appeared. +type methodSet map[string]*Selection // a nil entry indicates a name collision + +// Add adds all functions in list to the method set s. +// If multiples is set, every function in list appears multiple times +// and is treated as a collision. +func (s methodSet) add(list []*Func, index []int, indirect bool, multiples bool) methodSet { + if len(list) == 0 { + return s + } + if s == nil { + s = make(methodSet) + } + for i, f := range list { + key := f.Id() + // if f is not in the set, add it + if !multiples { + // TODO(gri) A found method may not be added because it's not in the method set + // (!indirect && ptrRecv(f)). A 2nd method on the same level may be in the method + // set and may not collide with the first one, thus leading to a false positive. + // Is that possible? Investigate. + if _, found := s[key]; !found && (indirect || !ptrRecv(f)) { + s[key] = &Selection{MethodVal, nil, f, concat(index, i), indirect} + continue + } + } + s[key] = nil // collision + } + return s +} + +// ptrRecv reports whether the receiver is of the form *T. +// The receiver must exist. +func ptrRecv(f *Func) bool { + _, isPtr := deref(f.typ.(*Signature).recv.typ) + return isPtr +} + +// byUniqueName function lists can be sorted by their unique names. +type byUniqueName []*Selection + +func (a byUniqueName) Len() int { return len(a) } +func (a byUniqueName) Less(i, j int) bool { return a[i].obj.Id() < a[j].obj.Id() } +func (a byUniqueName) Swap(i, j int) { a[i], a[j] = a[j], a[i] } diff --git a/vendor/golang.org/x/tools/go/types/object.go b/vendor/golang.org/x/tools/go/types/object.go new file mode 100644 index 0000000..a9b6c43 --- /dev/null +++ b/vendor/golang.org/x/tools/go/types/object.go @@ -0,0 +1,361 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package types + +import ( + "bytes" + "fmt" + "go/ast" + "go/token" + + "golang.org/x/tools/go/exact" +) + +// TODO(gri) Document factory, accessor methods, and fields. General clean-up. + +// An Object describes a named language entity such as a package, +// constant, type, variable, function (incl. methods), or label. +// All objects implement the Object interface. +// +type Object interface { + Parent() *Scope // scope in which this object is declared + Pos() token.Pos // position of object identifier in declaration + Pkg() *Package // nil for objects in the Universe scope and labels + Name() string // package local object name + Type() Type // object type + Exported() bool // reports whether the name starts with a capital letter + Id() string // object id (see Id below) + + // String returns a human-readable string of the object. + String() string + + // order reflects a package-level object's source order: if object + // a is before object b in the source, then a.order() < b.order(). + // order returns a value > 0 for package-level objects; it returns + // 0 for all other objects (including objects in file scopes). + order() uint32 + + // setOrder sets the order number of the object. It must be > 0. + setOrder(uint32) + + // setParent sets the parent scope of the object. + setParent(*Scope) + + // sameId reports whether obj.Id() and Id(pkg, name) are the same. + sameId(pkg *Package, name string) bool + + // scopePos returns the start position of the scope of this Object + scopePos() token.Pos + + // setScopePos sets the start position of the scope for this Object. + setScopePos(pos token.Pos) +} + +// Id returns name if it is exported, otherwise it +// returns the name qualified with the package path. +func Id(pkg *Package, name string) string { + if ast.IsExported(name) { + return name + } + // unexported names need the package path for differentiation + // (if there's no package, make sure we don't start with '.' + // as that may change the order of methods between a setup + // inside a package and outside a package - which breaks some + // tests) + path := "_" + // TODO(gri): shouldn't !ast.IsExported(name) => pkg != nil be an precondition? + // if pkg == nil { + // panic("nil package in lookup of unexported name") + // } + if pkg != nil { + path = pkg.path + if path == "" { + path = "_" + } + } + return path + "." + name +} + +// An object implements the common parts of an Object. +type object struct { + parent *Scope + pos token.Pos + pkg *Package + name string + typ Type + order_ uint32 + scopePos_ token.Pos +} + +func (obj *object) Parent() *Scope { return obj.parent } +func (obj *object) Pos() token.Pos { return obj.pos } +func (obj *object) Pkg() *Package { return obj.pkg } +func (obj *object) Name() string { return obj.name } +func (obj *object) Type() Type { return obj.typ } +func (obj *object) Exported() bool { return ast.IsExported(obj.name) } +func (obj *object) Id() string { return Id(obj.pkg, obj.name) } +func (obj *object) String() string { panic("abstract") } +func (obj *object) order() uint32 { return obj.order_ } +func (obj *object) scopePos() token.Pos { return obj.scopePos_ } + +func (obj *object) setParent(parent *Scope) { obj.parent = parent } +func (obj *object) setOrder(order uint32) { assert(order > 0); obj.order_ = order } +func (obj *object) setScopePos(pos token.Pos) { obj.scopePos_ = pos } + +func (obj *object) sameId(pkg *Package, name string) bool { + // spec: + // "Two identifiers are different if they are spelled differently, + // or if they appear in different packages and are not exported. + // Otherwise, they are the same." + if name != obj.name { + return false + } + // obj.Name == name + if obj.Exported() { + return true + } + // not exported, so packages must be the same (pkg == nil for + // fields in Universe scope; this can only happen for types + // introduced via Eval) + if pkg == nil || obj.pkg == nil { + return pkg == obj.pkg + } + // pkg != nil && obj.pkg != nil + return pkg.path == obj.pkg.path +} + +// A PkgName represents an imported Go package. +type PkgName struct { + object + imported *Package + used bool // set if the package was used +} + +func NewPkgName(pos token.Pos, pkg *Package, name string, imported *Package) *PkgName { + return &PkgName{object{nil, pos, pkg, name, Typ[Invalid], 0, token.NoPos}, imported, false} +} + +// Imported returns the package that was imported. +// It is distinct from Pkg(), which is the package containing the import statement. +func (obj *PkgName) Imported() *Package { return obj.imported } + +// A Const represents a declared constant. +type Const struct { + object + val exact.Value + visited bool // for initialization cycle detection +} + +func NewConst(pos token.Pos, pkg *Package, name string, typ Type, val exact.Value) *Const { + return &Const{object{nil, pos, pkg, name, typ, 0, token.NoPos}, val, false} +} + +func (obj *Const) Val() exact.Value { return obj.val } + +// A TypeName represents a declared type. +type TypeName struct { + object +} + +func NewTypeName(pos token.Pos, pkg *Package, name string, typ Type) *TypeName { + return &TypeName{object{nil, pos, pkg, name, typ, 0, token.NoPos}} +} + +// A Variable represents a declared variable (including function parameters and results, and struct fields). +type Var struct { + object + anonymous bool // if set, the variable is an anonymous struct field, and name is the type name + visited bool // for initialization cycle detection + isField bool // var is struct field + used bool // set if the variable was used +} + +func NewVar(pos token.Pos, pkg *Package, name string, typ Type) *Var { + return &Var{object: object{nil, pos, pkg, name, typ, 0, token.NoPos}} +} + +func NewParam(pos token.Pos, pkg *Package, name string, typ Type) *Var { + return &Var{object: object{nil, pos, pkg, name, typ, 0, token.NoPos}, used: true} // parameters are always 'used' +} + +func NewField(pos token.Pos, pkg *Package, name string, typ Type, anonymous bool) *Var { + return &Var{object: object{nil, pos, pkg, name, typ, 0, token.NoPos}, anonymous: anonymous, isField: true} +} + +func (obj *Var) Anonymous() bool { return obj.anonymous } + +func (obj *Var) IsField() bool { return obj.isField } + +// A Func represents a declared function, concrete method, or abstract +// (interface) method. Its Type() is always a *Signature. +// An abstract method may belong to many interfaces due to embedding. +type Func struct { + object +} + +func NewFunc(pos token.Pos, pkg *Package, name string, sig *Signature) *Func { + // don't store a nil signature + var typ Type + if sig != nil { + typ = sig + } + return &Func{object{nil, pos, pkg, name, typ, 0, token.NoPos}} +} + +// FullName returns the package- or receiver-type-qualified name of +// function or method obj. +func (obj *Func) FullName() string { + var buf bytes.Buffer + writeFuncName(&buf, obj, nil) + return buf.String() +} + +func (obj *Func) Scope() *Scope { + return obj.typ.(*Signature).scope +} + +// A Label represents a declared label. +type Label struct { + object + used bool // set if the label was used +} + +func NewLabel(pos token.Pos, pkg *Package, name string) *Label { + return &Label{object{pos: pos, pkg: pkg, name: name, typ: Typ[Invalid]}, false} +} + +// A Builtin represents a built-in function. +// Builtins don't have a valid type. +type Builtin struct { + object + id builtinId +} + +func newBuiltin(id builtinId) *Builtin { + return &Builtin{object{name: predeclaredFuncs[id].name, typ: Typ[Invalid]}, id} +} + +// Nil represents the predeclared value nil. +type Nil struct { + object +} + +func writeObject(buf *bytes.Buffer, obj Object, qf Qualifier) { + typ := obj.Type() + switch obj := obj.(type) { + case *PkgName: + fmt.Fprintf(buf, "package %s", obj.Name()) + if path := obj.imported.path; path != "" && path != obj.name { + fmt.Fprintf(buf, " (%q)", path) + } + return + + case *Const: + buf.WriteString("const") + + case *TypeName: + buf.WriteString("type") + typ = typ.Underlying() + + case *Var: + if obj.isField { + buf.WriteString("field") + } else { + buf.WriteString("var") + } + + case *Func: + buf.WriteString("func ") + writeFuncName(buf, obj, qf) + if typ != nil { + WriteSignature(buf, typ.(*Signature), qf) + } + return + + case *Label: + buf.WriteString("label") + typ = nil + + case *Builtin: + buf.WriteString("builtin") + typ = nil + + case *Nil: + buf.WriteString("nil") + return + + default: + panic(fmt.Sprintf("writeObject(%T)", obj)) + } + + buf.WriteByte(' ') + + // For package-level objects, qualify the name. + if obj.Pkg() != nil && obj.Pkg().scope.Lookup(obj.Name()) == obj { + writePackage(buf, obj.Pkg(), qf) + } + buf.WriteString(obj.Name()) + if typ != nil { + buf.WriteByte(' ') + WriteType(buf, typ, qf) + } +} + +func writePackage(buf *bytes.Buffer, pkg *Package, qf Qualifier) { + if pkg == nil { + return + } + var s string + if qf != nil { + s = qf(pkg) + } else { + s = pkg.Path() + } + if s != "" { + buf.WriteString(s) + buf.WriteByte('.') + } +} + +// ObjectString returns the string form of obj. +// The Qualifier controls the printing of +// package-level objects, and may be nil. +func ObjectString(obj Object, qf Qualifier) string { + var buf bytes.Buffer + writeObject(&buf, obj, qf) + return buf.String() +} + +func (obj *PkgName) String() string { return ObjectString(obj, nil) } +func (obj *Const) String() string { return ObjectString(obj, nil) } +func (obj *TypeName) String() string { return ObjectString(obj, nil) } +func (obj *Var) String() string { return ObjectString(obj, nil) } +func (obj *Func) String() string { return ObjectString(obj, nil) } +func (obj *Label) String() string { return ObjectString(obj, nil) } +func (obj *Builtin) String() string { return ObjectString(obj, nil) } +func (obj *Nil) String() string { return ObjectString(obj, nil) } + +func writeFuncName(buf *bytes.Buffer, f *Func, qf Qualifier) { + if f.typ != nil { + sig := f.typ.(*Signature) + if recv := sig.Recv(); recv != nil { + buf.WriteByte('(') + if _, ok := recv.Type().(*Interface); ok { + // gcimporter creates abstract methods of + // named interfaces using the interface type + // (not the named type) as the receiver. + // Don't print it in full. + buf.WriteString("interface") + } else { + WriteType(buf, recv.Type(), qf) + } + buf.WriteByte(')') + buf.WriteByte('.') + } else if f.pkg != nil { + writePackage(buf, f.pkg, qf) + } + } + buf.WriteString(f.name) +} diff --git a/vendor/golang.org/x/tools/go/types/objset.go b/vendor/golang.org/x/tools/go/types/objset.go new file mode 100644 index 0000000..55eb74a --- /dev/null +++ b/vendor/golang.org/x/tools/go/types/objset.go @@ -0,0 +1,31 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// This file implements objsets. +// +// An objset is similar to a Scope but objset elements +// are identified by their unique id, instead of their +// object name. + +package types + +// An objset is a set of objects identified by their unique id. +// The zero value for objset is a ready-to-use empty objset. +type objset map[string]Object // initialized lazily + +// insert attempts to insert an object obj into objset s. +// If s already contains an alternative object alt with +// the same name, insert leaves s unchanged and returns alt. +// Otherwise it inserts obj and returns nil. +func (s *objset) insert(obj Object) Object { + id := obj.Id() + if alt := (*s)[id]; alt != nil { + return alt + } + if *s == nil { + *s = make(map[string]Object) + } + (*s)[id] = obj + return nil +} diff --git a/vendor/golang.org/x/tools/go/types/operand.go b/vendor/golang.org/x/tools/go/types/operand.go new file mode 100644 index 0000000..d52b30e --- /dev/null +++ b/vendor/golang.org/x/tools/go/types/operand.go @@ -0,0 +1,288 @@ +// Copyright 2012 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// This file defines operands and associated operations. + +package types + +import ( + "bytes" + "go/ast" + "go/token" + + "golang.org/x/tools/go/exact" +) + +// An operandMode specifies the (addressing) mode of an operand. +type operandMode byte + +const ( + invalid operandMode = iota // operand is invalid + novalue // operand represents no value (result of a function call w/o result) + builtin // operand is a built-in function + typexpr // operand is a type + constant // operand is a constant; the operand's typ is a Basic type + variable // operand is an addressable variable + mapindex // operand is a map index expression (acts like a variable on lhs, commaok on rhs of an assignment) + value // operand is a computed value + commaok // like value, but operand may be used in a comma,ok expression +) + +var operandModeString = [...]string{ + invalid: "invalid operand", + novalue: "no value", + builtin: "built-in", + typexpr: "type", + constant: "constant", + variable: "variable", + mapindex: "map index expression", + value: "value", + commaok: "comma, ok expression", +} + +// An operand represents an intermediate value during type checking. +// Operands have an (addressing) mode, the expression evaluating to +// the operand, the operand's type, a value for constants, and an id +// for built-in functions. +// The zero value of operand is a ready to use invalid operand. +// +type operand struct { + mode operandMode + expr ast.Expr + typ Type + val exact.Value + id builtinId +} + +// pos returns the position of the expression corresponding to x. +// If x is invalid the position is token.NoPos. +// +func (x *operand) pos() token.Pos { + // x.expr may not be set if x is invalid + if x.expr == nil { + return token.NoPos + } + return x.expr.Pos() +} + +// Operand string formats +// (not all "untyped" cases can appear due to the type system, +// but they fall out naturally here) +// +// mode format +// +// invalid ( ) +// novalue ( ) +// builtin ( ) +// typexpr ( ) +// +// constant ( ) +// constant ( of type ) +// constant ( ) +// constant ( of type ) +// +// variable ( ) +// variable ( of type ) +// +// mapindex ( ) +// mapindex ( of type ) +// +// value ( ) +// value ( of type ) +// +// commaok ( ) +// commaok ( of type ) +// +func operandString(x *operand, qf Qualifier) string { + var buf bytes.Buffer + + var expr string + if x.expr != nil { + expr = ExprString(x.expr) + } else { + switch x.mode { + case builtin: + expr = predeclaredFuncs[x.id].name + case typexpr: + expr = TypeString(x.typ, qf) + case constant: + expr = x.val.String() + } + } + + // ( + if expr != "" { + buf.WriteString(expr) + buf.WriteString(" (") + } + + // + hasType := false + switch x.mode { + case invalid, novalue, builtin, typexpr: + // no type + default: + // has type + if isUntyped(x.typ) { + buf.WriteString(x.typ.(*Basic).name) + buf.WriteByte(' ') + break + } + hasType = true + } + + // + buf.WriteString(operandModeString[x.mode]) + + // + if x.mode == constant { + if s := x.val.String(); s != expr { + buf.WriteByte(' ') + buf.WriteString(s) + } + } + + // + if hasType { + if x.typ != Typ[Invalid] { + buf.WriteString(" of type ") + WriteType(&buf, x.typ, qf) + } else { + buf.WriteString(" with invalid type") + } + } + + // ) + if expr != "" { + buf.WriteByte(')') + } + + return buf.String() +} + +func (x *operand) String() string { + return operandString(x, nil) +} + +// setConst sets x to the untyped constant for literal lit. +func (x *operand) setConst(tok token.Token, lit string) { + val := exact.MakeFromLiteral(lit, tok) + if val == nil { + // TODO(gri) Should we make it an unknown constant instead? + x.mode = invalid + return + } + + var kind BasicKind + switch tok { + case token.INT: + kind = UntypedInt + case token.FLOAT: + kind = UntypedFloat + case token.IMAG: + kind = UntypedComplex + case token.CHAR: + kind = UntypedRune + case token.STRING: + kind = UntypedString + } + + x.mode = constant + x.typ = Typ[kind] + x.val = val +} + +// isNil reports whether x is the nil value. +func (x *operand) isNil() bool { + return x.mode == value && x.typ == Typ[UntypedNil] +} + +// TODO(gri) The functions operand.assignableTo, checker.convertUntyped, +// checker.representable, and checker.assignment are +// overlapping in functionality. Need to simplify and clean up. + +// assignableTo reports whether x is assignable to a variable of type T. +func (x *operand) assignableTo(conf *Config, T Type) bool { + if x.mode == invalid || T == Typ[Invalid] { + return true // avoid spurious errors + } + + V := x.typ + + // x's type is identical to T + if Identical(V, T) { + return true + } + + Vu := V.Underlying() + Tu := T.Underlying() + + // T is an interface type and x implements T + // (Do this check first as it might succeed early.) + if Ti, ok := Tu.(*Interface); ok { + if Implements(x.typ, Ti) { + return true + } + } + + // x's type V and T have identical underlying types + // and at least one of V or T is not a named type + if Identical(Vu, Tu) && (!isNamed(V) || !isNamed(T)) { + return true + } + + // x is a bidirectional channel value, T is a channel + // type, x's type V and T have identical element types, + // and at least one of V or T is not a named type + if Vc, ok := Vu.(*Chan); ok && Vc.dir == SendRecv { + if Tc, ok := Tu.(*Chan); ok && Identical(Vc.elem, Tc.elem) { + return !isNamed(V) || !isNamed(T) + } + } + + // x is the predeclared identifier nil and T is a pointer, + // function, slice, map, channel, or interface type + if x.isNil() { + switch t := Tu.(type) { + case *Basic: + if t.kind == UnsafePointer { + return true + } + case *Pointer, *Signature, *Slice, *Map, *Chan, *Interface: + return true + } + return false + } + + // x is an untyped constant representable by a value of type T + // TODO(gri) This is borrowing from checker.convertUntyped and + // checker.representable. Need to clean up. + if isUntyped(Vu) { + switch t := Tu.(type) { + case *Basic: + if x.mode == constant { + return representableConst(x.val, conf, t.kind, nil) + } + // The result of a comparison is an untyped boolean, + // but may not be a constant. + if Vb, _ := Vu.(*Basic); Vb != nil { + return Vb.kind == UntypedBool && isBoolean(Tu) + } + case *Interface: + return x.isNil() || t.Empty() + case *Pointer, *Signature, *Slice, *Map, *Chan: + return x.isNil() + } + } + + return false +} + +// isInteger reports whether x is a value of integer type +// or an untyped constant representable as an integer. +func (x *operand) isInteger() bool { + return x.mode == invalid || + isInteger(x.typ) || + isUntyped(x.typ) && x.mode == constant && representableConst(x.val, nil, UntypedInt, nil) // no *Config required for UntypedInt +} diff --git a/vendor/golang.org/x/tools/go/types/ordering.go b/vendor/golang.org/x/tools/go/types/ordering.go new file mode 100644 index 0000000..6bb98f2 --- /dev/null +++ b/vendor/golang.org/x/tools/go/types/ordering.go @@ -0,0 +1,127 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// This file implements resolveOrder. + +package types + +import ( + "go/ast" + "sort" +) + +// resolveOrder computes the order in which package-level objects +// must be type-checked. +// +// Interface types appear first in the list, sorted topologically +// by dependencies on embedded interfaces that are also declared +// in this package, followed by all other objects sorted in source +// order. +// +// TODO(gri) Consider sorting all types by dependencies here, and +// in the process check _and_ report type cycles. This may simplify +// the full type-checking phase. +// +func (check *Checker) resolveOrder() []Object { + var ifaces, others []Object + + // collect interface types with their dependencies, and all other objects + for obj := range check.objMap { + if ityp := check.interfaceFor(obj); ityp != nil { + ifaces = append(ifaces, obj) + // determine dependencies on embedded interfaces + for _, f := range ityp.Methods.List { + if len(f.Names) == 0 { + // Embedded interface: The type must be a (possibly + // qualified) identifier denoting another interface. + // Imported interfaces are already fully resolved, + // so we can ignore qualified identifiers. + if ident, _ := f.Type.(*ast.Ident); ident != nil { + embedded := check.pkg.scope.Lookup(ident.Name) + if check.interfaceFor(embedded) != nil { + check.objMap[obj].addDep(embedded) + } + } + } + } + } else { + others = append(others, obj) + } + } + + // final object order + var order []Object + + // sort interface types topologically by dependencies, + // and in source order if there are no dependencies + sort.Sort(inSourceOrder(ifaces)) + if debug { + for _, obj := range ifaces { + assert(check.objMap[obj].mark == 0) + } + } + for _, obj := range ifaces { + check.appendInPostOrder(&order, obj) + } + + // sort everything else in source order + sort.Sort(inSourceOrder(others)) + + return append(order, others...) +} + +// interfaceFor returns the AST interface denoted by obj, or nil. +func (check *Checker) interfaceFor(obj Object) *ast.InterfaceType { + tname, _ := obj.(*TypeName) + if tname == nil { + return nil // not a type + } + d := check.objMap[obj] + if d == nil { + check.dump("%s: %s should have been declared", obj.Pos(), obj.Name()) + unreachable() + } + if d.typ == nil { + return nil // invalid AST - ignore (will be handled later) + } + ityp, _ := d.typ.(*ast.InterfaceType) + return ityp +} + +func (check *Checker) appendInPostOrder(order *[]Object, obj Object) { + d := check.objMap[obj] + if d.mark != 0 { + // We've already seen this object; either because it's + // already added to order, or because we have a cycle. + // In both cases we stop. Cycle errors are reported + // when type-checking types. + return + } + d.mark = 1 + + for _, obj := range orderedSetObjects(d.deps) { + check.appendInPostOrder(order, obj) + } + + *order = append(*order, obj) +} + +func orderedSetObjects(set map[Object]bool) []Object { + list := make([]Object, len(set)) + i := 0 + for obj := range set { + // we don't care about the map element value + list[i] = obj + i++ + } + sort.Sort(inSourceOrder(list)) + return list +} + +// inSourceOrder implements the sort.Sort interface. +type inSourceOrder []Object + +func (a inSourceOrder) Len() int { return len(a) } +func (a inSourceOrder) Less(i, j int) bool { return a[i].order() < a[j].order() } +func (a inSourceOrder) Swap(i, j int) { a[i], a[j] = a[j], a[i] } diff --git a/vendor/golang.org/x/tools/go/types/package.go b/vendor/golang.org/x/tools/go/types/package.go new file mode 100644 index 0000000..48fe839 --- /dev/null +++ b/vendor/golang.org/x/tools/go/types/package.go @@ -0,0 +1,65 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package types + +import ( + "fmt" + "go/token" +) + +// A Package describes a Go package. +type Package struct { + path string + name string + scope *Scope + complete bool + imports []*Package + fake bool // scope lookup errors are silently dropped if package is fake (internal use only) +} + +// NewPackage returns a new Package for the given package path and name; +// the name must not be the blank identifier. +// The package is not complete and contains no explicit imports. +func NewPackage(path, name string) *Package { + if name == "_" { + panic("invalid package name _") + } + scope := NewScope(Universe, token.NoPos, token.NoPos, fmt.Sprintf("package %q", path)) + return &Package{path: path, name: name, scope: scope} +} + +// Path returns the package path. +func (pkg *Package) Path() string { return pkg.path } + +// Name returns the package name. +func (pkg *Package) Name() string { return pkg.name } + +// Scope returns the (complete or incomplete) package scope +// holding the objects declared at package level (TypeNames, +// Consts, Vars, and Funcs). +func (pkg *Package) Scope() *Scope { return pkg.scope } + +// A package is complete if its scope contains (at least) all +// exported objects; otherwise it is incomplete. +func (pkg *Package) Complete() bool { return pkg.complete } + +// MarkComplete marks a package as complete. +func (pkg *Package) MarkComplete() { pkg.complete = true } + +// Imports returns the list of packages directly imported by +// pkg; the list is in source order. Package unsafe is excluded. +// +// If pkg was loaded from export data, Imports includes packages that +// provide package-level objects referenced by pkg. This may be more or +// less than the set of packages directly imported by pkg's source code. +func (pkg *Package) Imports() []*Package { return pkg.imports } + +// SetImports sets the list of explicitly imported packages to list. +// It is the caller's responsibility to make sure list elements are unique. +func (pkg *Package) SetImports(list []*Package) { pkg.imports = list } + +func (pkg *Package) String() string { + return fmt.Sprintf("package %s (%q)", pkg.name, pkg.path) +} diff --git a/vendor/golang.org/x/tools/go/types/predicates.go b/vendor/golang.org/x/tools/go/types/predicates.go new file mode 100644 index 0000000..993c6d2 --- /dev/null +++ b/vendor/golang.org/x/tools/go/types/predicates.go @@ -0,0 +1,309 @@ +// Copyright 2012 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// This file implements commonly used type predicates. + +package types + +import "sort" + +func isNamed(typ Type) bool { + if _, ok := typ.(*Basic); ok { + return ok + } + _, ok := typ.(*Named) + return ok +} + +func isBoolean(typ Type) bool { + t, ok := typ.Underlying().(*Basic) + return ok && t.info&IsBoolean != 0 +} + +func isInteger(typ Type) bool { + t, ok := typ.Underlying().(*Basic) + return ok && t.info&IsInteger != 0 +} + +func isUnsigned(typ Type) bool { + t, ok := typ.Underlying().(*Basic) + return ok && t.info&IsUnsigned != 0 +} + +func isFloat(typ Type) bool { + t, ok := typ.Underlying().(*Basic) + return ok && t.info&IsFloat != 0 +} + +func isComplex(typ Type) bool { + t, ok := typ.Underlying().(*Basic) + return ok && t.info&IsComplex != 0 +} + +func isNumeric(typ Type) bool { + t, ok := typ.Underlying().(*Basic) + return ok && t.info&IsNumeric != 0 +} + +func isString(typ Type) bool { + t, ok := typ.Underlying().(*Basic) + return ok && t.info&IsString != 0 +} + +func isTyped(typ Type) bool { + t, ok := typ.Underlying().(*Basic) + return !ok || t.info&IsUntyped == 0 +} + +func isUntyped(typ Type) bool { + t, ok := typ.Underlying().(*Basic) + return ok && t.info&IsUntyped != 0 +} + +func isOrdered(typ Type) bool { + t, ok := typ.Underlying().(*Basic) + return ok && t.info&IsOrdered != 0 +} + +func isConstType(typ Type) bool { + t, ok := typ.Underlying().(*Basic) + return ok && t.info&IsConstType != 0 +} + +// IsInterface reports whether typ is an interface type. +func IsInterface(typ Type) bool { + _, ok := typ.Underlying().(*Interface) + return ok +} + +// Comparable reports whether values of type T are comparable. +func Comparable(T Type) bool { + switch t := T.Underlying().(type) { + case *Basic: + // assume invalid types to be comparable + // to avoid follow-up errors + return t.kind != UntypedNil + case *Pointer, *Interface, *Chan: + return true + case *Struct: + for _, f := range t.fields { + if !Comparable(f.typ) { + return false + } + } + return true + case *Array: + return Comparable(t.elem) + } + return false +} + +// hasNil reports whether a type includes the nil value. +func hasNil(typ Type) bool { + switch t := typ.Underlying().(type) { + case *Basic: + return t.kind == UnsafePointer + case *Slice, *Pointer, *Signature, *Interface, *Map, *Chan: + return true + } + return false +} + +// Identical reports whether x and y are identical. +func Identical(x, y Type) bool { + return identical(x, y, nil) +} + +// An ifacePair is a node in a stack of interface type pairs compared for identity. +type ifacePair struct { + x, y *Interface + prev *ifacePair +} + +func (p *ifacePair) identical(q *ifacePair) bool { + return p.x == q.x && p.y == q.y || p.x == q.y && p.y == q.x +} + +func identical(x, y Type, p *ifacePair) bool { + if x == y { + return true + } + + switch x := x.(type) { + case *Basic: + // Basic types are singletons except for the rune and byte + // aliases, thus we cannot solely rely on the x == y check + // above. + if y, ok := y.(*Basic); ok { + return x.kind == y.kind + } + + case *Array: + // Two array types are identical if they have identical element types + // and the same array length. + if y, ok := y.(*Array); ok { + return x.len == y.len && identical(x.elem, y.elem, p) + } + + case *Slice: + // Two slice types are identical if they have identical element types. + if y, ok := y.(*Slice); ok { + return identical(x.elem, y.elem, p) + } + + case *Struct: + // Two struct types are identical if they have the same sequence of fields, + // and if corresponding fields have the same names, and identical types, + // and identical tags. Two anonymous fields are considered to have the same + // name. Lower-case field names from different packages are always different. + if y, ok := y.(*Struct); ok { + if x.NumFields() == y.NumFields() { + for i, f := range x.fields { + g := y.fields[i] + if f.anonymous != g.anonymous || + x.Tag(i) != y.Tag(i) || + !f.sameId(g.pkg, g.name) || + !identical(f.typ, g.typ, p) { + return false + } + } + return true + } + } + + case *Pointer: + // Two pointer types are identical if they have identical base types. + if y, ok := y.(*Pointer); ok { + return identical(x.base, y.base, p) + } + + case *Tuple: + // Two tuples types are identical if they have the same number of elements + // and corresponding elements have identical types. + if y, ok := y.(*Tuple); ok { + if x.Len() == y.Len() { + if x != nil { + for i, v := range x.vars { + w := y.vars[i] + if !identical(v.typ, w.typ, p) { + return false + } + } + } + return true + } + } + + case *Signature: + // Two function types are identical if they have the same number of parameters + // and result values, corresponding parameter and result types are identical, + // and either both functions are variadic or neither is. Parameter and result + // names are not required to match. + if y, ok := y.(*Signature); ok { + return x.variadic == y.variadic && + identical(x.params, y.params, p) && + identical(x.results, y.results, p) + } + + case *Interface: + // Two interface types are identical if they have the same set of methods with + // the same names and identical function types. Lower-case method names from + // different packages are always different. The order of the methods is irrelevant. + if y, ok := y.(*Interface); ok { + a := x.allMethods + b := y.allMethods + if len(a) == len(b) { + // Interface types are the only types where cycles can occur + // that are not "terminated" via named types; and such cycles + // can only be created via method parameter types that are + // anonymous interfaces (directly or indirectly) embedding + // the current interface. Example: + // + // type T interface { + // m() interface{T} + // } + // + // If two such (differently named) interfaces are compared, + // endless recursion occurs if the cycle is not detected. + // + // If x and y were compared before, they must be equal + // (if they were not, the recursion would have stopped); + // search the ifacePair stack for the same pair. + // + // This is a quadratic algorithm, but in practice these stacks + // are extremely short (bounded by the nesting depth of interface + // type declarations that recur via parameter types, an extremely + // rare occurrence). An alternative implementation might use a + // "visited" map, but that is probably less efficient overall. + q := &ifacePair{x, y, p} + for p != nil { + if p.identical(q) { + return true // same pair was compared before + } + p = p.prev + } + if debug { + assert(sort.IsSorted(byUniqueMethodName(a))) + assert(sort.IsSorted(byUniqueMethodName(b))) + } + for i, f := range a { + g := b[i] + if f.Id() != g.Id() || !identical(f.typ, g.typ, q) { + return false + } + } + return true + } + } + + case *Map: + // Two map types are identical if they have identical key and value types. + if y, ok := y.(*Map); ok { + return identical(x.key, y.key, p) && identical(x.elem, y.elem, p) + } + + case *Chan: + // Two channel types are identical if they have identical value types + // and the same direction. + if y, ok := y.(*Chan); ok { + return x.dir == y.dir && identical(x.elem, y.elem, p) + } + + case *Named: + // Two named types are identical if their type names originate + // in the same type declaration. + if y, ok := y.(*Named); ok { + return x.obj == y.obj + } + + default: + unreachable() + } + + return false +} + +// defaultType returns the default "typed" type for an "untyped" type; +// it returns the incoming type for all other types. The default type +// for untyped nil is untyped nil. +// +func defaultType(typ Type) Type { + if t, ok := typ.(*Basic); ok { + switch t.kind { + case UntypedBool: + return Typ[Bool] + case UntypedInt: + return Typ[Int] + case UntypedRune: + return universeRune // use 'rune' name + case UntypedFloat: + return Typ[Float64] + case UntypedComplex: + return Typ[Complex128] + case UntypedString: + return Typ[String] + } + } + return typ +} diff --git a/vendor/golang.org/x/tools/go/types/resolver.go b/vendor/golang.org/x/tools/go/types/resolver.go new file mode 100644 index 0000000..374ffc2 --- /dev/null +++ b/vendor/golang.org/x/tools/go/types/resolver.go @@ -0,0 +1,453 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package types + +import ( + "errors" + "fmt" + "go/ast" + "go/token" + pathLib "path" + "strconv" + "strings" + "unicode" + + "golang.org/x/tools/go/exact" +) + +// A declInfo describes a package-level const, type, var, or func declaration. +type declInfo struct { + file *Scope // scope of file containing this declaration + lhs []*Var // lhs of n:1 variable declarations, or nil + typ ast.Expr // type, or nil + init ast.Expr // init expression, or nil + fdecl *ast.FuncDecl // func declaration, or nil + + deps map[Object]bool // type and init dependencies; lazily allocated + mark int // for dependency analysis +} + +// hasInitializer reports whether the declared object has an initialization +// expression or function body. +func (d *declInfo) hasInitializer() bool { + return d.init != nil || d.fdecl != nil && d.fdecl.Body != nil +} + +// addDep adds obj as a dependency to d. +func (d *declInfo) addDep(obj Object) { + m := d.deps + if m == nil { + m = make(map[Object]bool) + d.deps = m + } + m[obj] = true +} + +// arityMatch checks that the lhs and rhs of a const or var decl +// have the appropriate number of names and init exprs. For const +// decls, init is the value spec providing the init exprs; for +// var decls, init is nil (the init exprs are in s in this case). +func (check *Checker) arityMatch(s, init *ast.ValueSpec) { + l := len(s.Names) + r := len(s.Values) + if init != nil { + r = len(init.Values) + } + + switch { + case init == nil && r == 0: + // var decl w/o init expr + if s.Type == nil { + check.errorf(s.Pos(), "missing type or init expr") + } + case l < r: + if l < len(s.Values) { + // init exprs from s + n := s.Values[l] + check.errorf(n.Pos(), "extra init expr %s", n) + // TODO(gri) avoid declared but not used error here + } else { + // init exprs "inherited" + check.errorf(s.Pos(), "extra init expr at %s", init.Pos()) + // TODO(gri) avoid declared but not used error here + } + case l > r && (init != nil || r != 1): + n := s.Names[r] + check.errorf(n.Pos(), "missing init expr for %s", n) + } +} + +func validatedImportPath(path string) (string, error) { + s, err := strconv.Unquote(path) + if err != nil { + return "", err + } + if s == "" { + return "", fmt.Errorf("empty string") + } + const illegalChars = `!"#$%&'()*,:;<=>?[\]^{|}` + "`\uFFFD" + for _, r := range s { + if !unicode.IsGraphic(r) || unicode.IsSpace(r) || strings.ContainsRune(illegalChars, r) { + return s, fmt.Errorf("invalid character %#U", r) + } + } + return s, nil +} + +// declarePkgObj declares obj in the package scope, records its ident -> obj mapping, +// and updates check.objMap. The object must not be a function or method. +func (check *Checker) declarePkgObj(ident *ast.Ident, obj Object, d *declInfo) { + assert(ident.Name == obj.Name()) + + // spec: "A package-scope or file-scope identifier with name init + // may only be declared to be a function with this (func()) signature." + if ident.Name == "init" { + check.errorf(ident.Pos(), "cannot declare init - must be func") + return + } + + check.declare(check.pkg.scope, ident, obj, token.NoPos) + check.objMap[obj] = d + obj.setOrder(uint32(len(check.objMap))) +} + +// filename returns a filename suitable for debugging output. +func (check *Checker) filename(fileNo int) string { + file := check.files[fileNo] + if pos := file.Pos(); pos.IsValid() { + return check.fset.File(pos).Name() + } + return fmt.Sprintf("file[%d]", fileNo) +} + +// collectObjects collects all file and package objects and inserts them +// into their respective scopes. It also performs imports and associates +// methods with receiver base type names. +func (check *Checker) collectObjects() { + pkg := check.pkg + + importer := check.conf.Import + if importer == nil { + if DefaultImport != nil { + importer = DefaultImport + } else { + // Panic if we encounter an import. + importer = func(map[string]*Package, string) (*Package, error) { + panic(`no Config.Import or DefaultImport (missing import _ "golang.org/x/tools/go/gcimporter"?)`) + } + } + } + + // pkgImports is the set of packages already imported by any package file seen + // so far. Used to avoid duplicate entries in pkg.imports. Allocate and populate + // it (pkg.imports may not be empty if we are checking test files incrementally). + var pkgImports = make(map[*Package]bool) + for _, imp := range pkg.imports { + pkgImports[imp] = true + } + + for fileNo, file := range check.files { + // The package identifier denotes the current package, + // but there is no corresponding package object. + check.recordDef(file.Name, nil) + + // Use the actual source file extent rather than *ast.File extent since the + // latter doesn't include comments which appear at the start or end of the file. + // Be conservative and use the *ast.File extent if we don't have a *token.File. + pos, end := file.Pos(), file.End() + if f := check.fset.File(file.Pos()); f != nil { + pos, end = token.Pos(f.Base()), token.Pos(f.Base()+f.Size()) + } + fileScope := NewScope(check.pkg.scope, pos, end, check.filename(fileNo)) + check.recordScope(file, fileScope) + + for _, decl := range file.Decls { + switch d := decl.(type) { + case *ast.BadDecl: + // ignore + + case *ast.GenDecl: + var last *ast.ValueSpec // last ValueSpec with type or init exprs seen + for iota, spec := range d.Specs { + switch s := spec.(type) { + case *ast.ImportSpec: + // import package + var imp *Package + path, err := validatedImportPath(s.Path.Value) + if err != nil { + check.errorf(s.Path.Pos(), "invalid import path (%s)", err) + continue + } + if path == "C" && check.conf.FakeImportC { + // TODO(gri) shouldn't create a new one each time + imp = NewPackage("C", "C") + imp.fake = true + } else { + var err error + imp, err = importer(check.conf.Packages, path) + if imp == nil && err == nil { + err = errors.New("Config.Import returned nil but no error") + } + if err != nil { + check.errorf(s.Path.Pos(), "could not import %s (%s)", path, err) + continue + } + } + + // add package to list of explicit imports + // (this functionality is provided as a convenience + // for clients; it is not needed for type-checking) + if !pkgImports[imp] { + pkgImports[imp] = true + if imp != Unsafe { + pkg.imports = append(pkg.imports, imp) + } + } + + // local name overrides imported package name + name := imp.name + if s.Name != nil { + name = s.Name.Name + if name == "init" { + check.errorf(s.Name.Pos(), "cannot declare init - must be func") + continue + } + } + + obj := NewPkgName(s.Pos(), pkg, name, imp) + if s.Name != nil { + // in a dot-import, the dot represents the package + check.recordDef(s.Name, obj) + } else { + check.recordImplicit(s, obj) + } + + // add import to file scope + if name == "." { + // merge imported scope with file scope + for _, obj := range imp.scope.elems { + // A package scope may contain non-exported objects, + // do not import them! + if obj.Exported() { + // TODO(gri) When we import a package, we create + // a new local package object. We should do the + // same for each dot-imported object. That way + // they can have correct position information. + // (We must not modify their existing position + // information because the same package - found + // via Config.Packages - may be dot-imported in + // another package!) + check.declare(fileScope, nil, obj, token.NoPos) + check.recordImplicit(s, obj) + } + } + // add position to set of dot-import positions for this file + // (this is only needed for "imported but not used" errors) + check.addUnusedDotImport(fileScope, imp, s.Pos()) + } else { + // declare imported package object in file scope + check.declare(fileScope, nil, obj, token.NoPos) + } + + case *ast.ValueSpec: + switch d.Tok { + case token.CONST: + // determine which initialization expressions to use + switch { + case s.Type != nil || len(s.Values) > 0: + last = s + case last == nil: + last = new(ast.ValueSpec) // make sure last exists + } + + // declare all constants + for i, name := range s.Names { + obj := NewConst(name.Pos(), pkg, name.Name, nil, exact.MakeInt64(int64(iota))) + + var init ast.Expr + if i < len(last.Values) { + init = last.Values[i] + } + + d := &declInfo{file: fileScope, typ: last.Type, init: init} + check.declarePkgObj(name, obj, d) + } + + check.arityMatch(s, last) + + case token.VAR: + lhs := make([]*Var, len(s.Names)) + // If there's exactly one rhs initializer, use + // the same declInfo d1 for all lhs variables + // so that each lhs variable depends on the same + // rhs initializer (n:1 var declaration). + var d1 *declInfo + if len(s.Values) == 1 { + // The lhs elements are only set up after the for loop below, + // but that's ok because declareVar only collects the declInfo + // for a later phase. + d1 = &declInfo{file: fileScope, lhs: lhs, typ: s.Type, init: s.Values[0]} + } + + // declare all variables + for i, name := range s.Names { + obj := NewVar(name.Pos(), pkg, name.Name, nil) + lhs[i] = obj + + d := d1 + if d == nil { + // individual assignments + var init ast.Expr + if i < len(s.Values) { + init = s.Values[i] + } + d = &declInfo{file: fileScope, typ: s.Type, init: init} + } + + check.declarePkgObj(name, obj, d) + } + + check.arityMatch(s, nil) + + default: + check.invalidAST(s.Pos(), "invalid token %s", d.Tok) + } + + case *ast.TypeSpec: + obj := NewTypeName(s.Name.Pos(), pkg, s.Name.Name, nil) + check.declarePkgObj(s.Name, obj, &declInfo{file: fileScope, typ: s.Type}) + + default: + check.invalidAST(s.Pos(), "unknown ast.Spec node %T", s) + } + } + + case *ast.FuncDecl: + name := d.Name.Name + obj := NewFunc(d.Name.Pos(), pkg, name, nil) + if d.Recv == nil { + // regular function + if name == "init" { + // don't declare init functions in the package scope - they are invisible + obj.parent = pkg.scope + check.recordDef(d.Name, obj) + // init functions must have a body + if d.Body == nil { + check.softErrorf(obj.pos, "missing function body") + } + } else { + check.declare(pkg.scope, d.Name, obj, token.NoPos) + } + } else { + // method + check.recordDef(d.Name, obj) + // Associate method with receiver base type name, if possible. + // Ignore methods that have an invalid receiver, or a blank _ + // receiver name. They will be type-checked later, with regular + // functions. + if list := d.Recv.List; len(list) > 0 { + typ := list[0].Type + if ptr, _ := typ.(*ast.StarExpr); ptr != nil { + typ = ptr.X + } + if base, _ := typ.(*ast.Ident); base != nil && base.Name != "_" { + check.assocMethod(base.Name, obj) + } + } + } + info := &declInfo{file: fileScope, fdecl: d} + check.objMap[obj] = info + obj.setOrder(uint32(len(check.objMap))) + + default: + check.invalidAST(d.Pos(), "unknown ast.Decl node %T", d) + } + } + } + + // verify that objects in package and file scopes have different names + for _, scope := range check.pkg.scope.children /* file scopes */ { + for _, obj := range scope.elems { + if alt := pkg.scope.Lookup(obj.Name()); alt != nil { + if pkg, ok := obj.(*PkgName); ok { + check.errorf(alt.Pos(), "%s already declared through import of %s", alt.Name(), pkg.Imported()) + check.reportAltDecl(pkg) + } else { + check.errorf(alt.Pos(), "%s already declared through dot-import of %s", alt.Name(), obj.Pkg()) + // TODO(gri) dot-imported objects don't have a position; reportAltDecl won't print anything + check.reportAltDecl(obj) + } + } + } + } +} + +// packageObjects typechecks all package objects in objList, but not function bodies. +func (check *Checker) packageObjects(objList []Object) { + // add new methods to already type-checked types (from a prior Checker.Files call) + for _, obj := range objList { + if obj, _ := obj.(*TypeName); obj != nil && obj.typ != nil { + check.addMethodDecls(obj) + } + } + + // pre-allocate space for type declaration paths so that the underlying array is reused + typePath := make([]*TypeName, 0, 8) + + for _, obj := range objList { + check.objDecl(obj, nil, typePath) + } + + // At this point we may have a non-empty check.methods map; this means that not all + // entries were deleted at the end of typeDecl because the respective receiver base + // types were not found. In that case, an error was reported when declaring those + // methods. We can now safely discard this map. + check.methods = nil +} + +// functionBodies typechecks all function bodies. +func (check *Checker) functionBodies() { + for _, f := range check.funcs { + check.funcBody(f.decl, f.name, f.sig, f.body) + } +} + +// unusedImports checks for unused imports. +func (check *Checker) unusedImports() { + // if function bodies are not checked, packages' uses are likely missing - don't check + if check.conf.IgnoreFuncBodies { + return + } + + // spec: "It is illegal (...) to directly import a package without referring to + // any of its exported identifiers. To import a package solely for its side-effects + // (initialization), use the blank identifier as explicit package name." + + // check use of regular imported packages + for _, scope := range check.pkg.scope.children /* file scopes */ { + for _, obj := range scope.elems { + if obj, ok := obj.(*PkgName); ok { + // Unused "blank imports" are automatically ignored + // since _ identifiers are not entered into scopes. + if !obj.used { + path := obj.imported.path + base := pathLib.Base(path) + if obj.name == base { + check.softErrorf(obj.pos, "%q imported but not used", path) + } else { + check.softErrorf(obj.pos, "%q imported but not used as %s", path, obj.name) + } + } + } + } + } + + // check use of dot-imported packages + for _, unusedDotImports := range check.unusedDotImports { + for pkg, pos := range unusedDotImports { + check.softErrorf(pos, "%q imported but not used", pkg.path) + } + } +} diff --git a/vendor/golang.org/x/tools/go/types/return.go b/vendor/golang.org/x/tools/go/types/return.go new file mode 100644 index 0000000..6628985 --- /dev/null +++ b/vendor/golang.org/x/tools/go/types/return.go @@ -0,0 +1,185 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// This file implements isTerminating. + +package types + +import ( + "go/ast" + "go/token" +) + +// isTerminating reports if s is a terminating statement. +// If s is labeled, label is the label name; otherwise s +// is "". +func (check *Checker) isTerminating(s ast.Stmt, label string) bool { + switch s := s.(type) { + default: + unreachable() + + case *ast.BadStmt, *ast.DeclStmt, *ast.EmptyStmt, *ast.SendStmt, + *ast.IncDecStmt, *ast.AssignStmt, *ast.GoStmt, *ast.DeferStmt, + *ast.RangeStmt: + // no chance + + case *ast.LabeledStmt: + return check.isTerminating(s.Stmt, s.Label.Name) + + case *ast.ExprStmt: + // the predeclared (possibly parenthesized) panic() function is terminating + if call, _ := unparen(s.X).(*ast.CallExpr); call != nil { + if id, _ := call.Fun.(*ast.Ident); id != nil { + if _, obj := check.scope.LookupParent(id.Name, token.NoPos); obj != nil { + if b, _ := obj.(*Builtin); b != nil && b.id == _Panic { + return true + } + } + } + } + + case *ast.ReturnStmt: + return true + + case *ast.BranchStmt: + if s.Tok == token.GOTO || s.Tok == token.FALLTHROUGH { + return true + } + + case *ast.BlockStmt: + return check.isTerminatingList(s.List, "") + + case *ast.IfStmt: + if s.Else != nil && + check.isTerminating(s.Body, "") && + check.isTerminating(s.Else, "") { + return true + } + + case *ast.SwitchStmt: + return check.isTerminatingSwitch(s.Body, label) + + case *ast.TypeSwitchStmt: + return check.isTerminatingSwitch(s.Body, label) + + case *ast.SelectStmt: + for _, s := range s.Body.List { + cc := s.(*ast.CommClause) + if !check.isTerminatingList(cc.Body, "") || hasBreakList(cc.Body, label, true) { + return false + } + + } + return true + + case *ast.ForStmt: + if s.Cond == nil && !hasBreak(s.Body, label, true) { + return true + } + } + + return false +} + +func (check *Checker) isTerminatingList(list []ast.Stmt, label string) bool { + n := len(list) + return n > 0 && check.isTerminating(list[n-1], label) +} + +func (check *Checker) isTerminatingSwitch(body *ast.BlockStmt, label string) bool { + hasDefault := false + for _, s := range body.List { + cc := s.(*ast.CaseClause) + if cc.List == nil { + hasDefault = true + } + if !check.isTerminatingList(cc.Body, "") || hasBreakList(cc.Body, label, true) { + return false + } + } + return hasDefault +} + +// TODO(gri) For nested breakable statements, the current implementation of hasBreak +// will traverse the same subtree repeatedly, once for each label. Replace +// with a single-pass label/break matching phase. + +// hasBreak reports if s is or contains a break statement +// referring to the label-ed statement or implicit-ly the +// closest outer breakable statement. +func hasBreak(s ast.Stmt, label string, implicit bool) bool { + switch s := s.(type) { + default: + unreachable() + + case *ast.BadStmt, *ast.DeclStmt, *ast.EmptyStmt, *ast.ExprStmt, + *ast.SendStmt, *ast.IncDecStmt, *ast.AssignStmt, *ast.GoStmt, + *ast.DeferStmt, *ast.ReturnStmt: + // no chance + + case *ast.LabeledStmt: + return hasBreak(s.Stmt, label, implicit) + + case *ast.BranchStmt: + if s.Tok == token.BREAK { + if s.Label == nil { + return implicit + } + if s.Label.Name == label { + return true + } + } + + case *ast.BlockStmt: + return hasBreakList(s.List, label, implicit) + + case *ast.IfStmt: + if hasBreak(s.Body, label, implicit) || + s.Else != nil && hasBreak(s.Else, label, implicit) { + return true + } + + case *ast.CaseClause: + return hasBreakList(s.Body, label, implicit) + + case *ast.SwitchStmt: + if label != "" && hasBreak(s.Body, label, false) { + return true + } + + case *ast.TypeSwitchStmt: + if label != "" && hasBreak(s.Body, label, false) { + return true + } + + case *ast.CommClause: + return hasBreakList(s.Body, label, implicit) + + case *ast.SelectStmt: + if label != "" && hasBreak(s.Body, label, false) { + return true + } + + case *ast.ForStmt: + if label != "" && hasBreak(s.Body, label, false) { + return true + } + + case *ast.RangeStmt: + if label != "" && hasBreak(s.Body, label, false) { + return true + } + } + + return false +} + +func hasBreakList(list []ast.Stmt, label string, implicit bool) bool { + for _, s := range list { + if hasBreak(s, label, implicit) { + return true + } + } + return false +} diff --git a/vendor/golang.org/x/tools/go/types/scope.go b/vendor/golang.org/x/tools/go/types/scope.go new file mode 100644 index 0000000..3502840 --- /dev/null +++ b/vendor/golang.org/x/tools/go/types/scope.go @@ -0,0 +1,190 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// This file implements Scopes. + +package types + +import ( + "bytes" + "fmt" + "go/token" + "io" + "sort" + "strings" +) + +// TODO(gri) Provide scopes with a name or other mechanism so that +// objects can use that information for better printing. + +// A Scope maintains a set of objects and links to its containing +// (parent) and contained (children) scopes. Objects may be inserted +// and looked up by name. The zero value for Scope is a ready-to-use +// empty scope. +type Scope struct { + parent *Scope + children []*Scope + elems map[string]Object // lazily allocated + pos, end token.Pos // scope extent; may be invalid + comment string // for debugging only +} + +// NewScope returns a new, empty scope contained in the given parent +// scope, if any. The comment is for debugging only. +func NewScope(parent *Scope, pos, end token.Pos, comment string) *Scope { + s := &Scope{parent, nil, nil, pos, end, comment} + // don't add children to Universe scope! + if parent != nil && parent != Universe { + parent.children = append(parent.children, s) + } + return s +} + +// Parent returns the scope's containing (parent) scope. +func (s *Scope) Parent() *Scope { return s.parent } + +// Len() returns the number of scope elements. +func (s *Scope) Len() int { return len(s.elems) } + +// Names returns the scope's element names in sorted order. +func (s *Scope) Names() []string { + names := make([]string, len(s.elems)) + i := 0 + for name := range s.elems { + names[i] = name + i++ + } + sort.Strings(names) + return names +} + +// NumChildren() returns the number of scopes nested in s. +func (s *Scope) NumChildren() int { return len(s.children) } + +// Child returns the i'th child scope for 0 <= i < NumChildren(). +func (s *Scope) Child(i int) *Scope { return s.children[i] } + +// Lookup returns the object in scope s with the given name if such an +// object exists; otherwise the result is nil. +func (s *Scope) Lookup(name string) Object { + return s.elems[name] +} + +// LookupParent follows the parent chain of scopes starting with s until +// it finds a scope where Lookup(name) returns a non-nil object, and then +// returns that scope and object. If a valid position pos is provided, +// only objects that were declared at or before pos are considered. +// If no such scope and object exists, the result is (nil, nil). +// +// Note that obj.Parent() may be different from the returned scope if the +// object was inserted into the scope and already had a parent at that +// time (see Insert, below). This can only happen for dot-imported objects +// whose scope is the scope of the package that exported them. +func (s *Scope) LookupParent(name string, pos token.Pos) (*Scope, Object) { + for ; s != nil; s = s.parent { + if obj := s.elems[name]; obj != nil && (!pos.IsValid() || obj.scopePos() <= pos) { + return s, obj + } + } + return nil, nil +} + +// Insert attempts to insert an object obj into scope s. +// If s already contains an alternative object alt with +// the same name, Insert leaves s unchanged and returns alt. +// Otherwise it inserts obj, sets the object's parent scope +// if not already set, and returns nil. +func (s *Scope) Insert(obj Object) Object { + name := obj.Name() + if alt := s.elems[name]; alt != nil { + return alt + } + if s.elems == nil { + s.elems = make(map[string]Object) + } + s.elems[name] = obj + if obj.Parent() == nil { + obj.setParent(s) + } + return nil +} + +// Pos and End describe the scope's source code extent [pos, end). +// The results are guaranteed to be valid only if the type-checked +// AST has complete position information. The extent is undefined +// for Universe and package scopes. +func (s *Scope) Pos() token.Pos { return s.pos } +func (s *Scope) End() token.Pos { return s.end } + +// Contains returns true if pos is within the scope's extent. +// The result is guaranteed to be valid only if the type-checked +// AST has complete position information. +func (s *Scope) Contains(pos token.Pos) bool { + return s.pos <= pos && pos < s.end +} + +// Innermost returns the innermost (child) scope containing +// pos. If pos is not within any scope, the result is nil. +// The result is also nil for the Universe scope. +// The result is guaranteed to be valid only if the type-checked +// AST has complete position information. +func (s *Scope) Innermost(pos token.Pos) *Scope { + // Package scopes do not have extents since they may be + // discontiguous, so iterate over the package's files. + if s.parent == Universe { + for _, s := range s.children { + if inner := s.Innermost(pos); inner != nil { + return inner + } + } + } + + if s.Contains(pos) { + for _, s := range s.children { + if s.Contains(pos) { + return s.Innermost(pos) + } + } + return s + } + return nil +} + +// WriteTo writes a string representation of the scope to w, +// with the scope elements sorted by name. +// The level of indentation is controlled by n >= 0, with +// n == 0 for no indentation. +// If recurse is set, it also writes nested (children) scopes. +func (s *Scope) WriteTo(w io.Writer, n int, recurse bool) { + const ind = ". " + indn := strings.Repeat(ind, n) + + fmt.Fprintf(w, "%s%s scope %p {", indn, s.comment, s) + if len(s.elems) == 0 { + fmt.Fprintf(w, "}\n") + return + } + + fmt.Fprintln(w) + indn1 := indn + ind + for _, name := range s.Names() { + fmt.Fprintf(w, "%s%s\n", indn1, s.elems[name]) + } + + if recurse { + for _, s := range s.children { + fmt.Fprintln(w) + s.WriteTo(w, n+1, recurse) + } + } + + fmt.Fprintf(w, "%s}", indn) +} + +// String returns a string representation of the scope, for debugging. +func (s *Scope) String() string { + var buf bytes.Buffer + s.WriteTo(&buf, 0, false) + return buf.String() +} diff --git a/vendor/golang.org/x/tools/go/types/selection.go b/vendor/golang.org/x/tools/go/types/selection.go new file mode 100644 index 0000000..124e0d3 --- /dev/null +++ b/vendor/golang.org/x/tools/go/types/selection.go @@ -0,0 +1,143 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// This file implements Selections. + +package types + +import ( + "bytes" + "fmt" +) + +// SelectionKind describes the kind of a selector expression x.f +// (excluding qualified identifiers). +type SelectionKind int + +const ( + FieldVal SelectionKind = iota // x.f is a struct field selector + MethodVal // x.f is a method selector + MethodExpr // x.f is a method expression +) + +// A Selection describes a selector expression x.f. +// For the declarations: +// +// type T struct{ x int; E } +// type E struct{} +// func (e E) m() {} +// var p *T +// +// the following relations exist: +// +// Selector Kind Recv Obj Type Index Indirect +// +// p.x FieldVal T x int {0} true +// p.m MethodVal *T m func (e *T) m() {1, 0} true +// T.m MethodExpr T m func m(_ T) {1, 0} false +// +type Selection struct { + kind SelectionKind + recv Type // type of x + obj Object // object denoted by x.f + index []int // path from x to x.f + indirect bool // set if there was any pointer indirection on the path +} + +// Kind returns the selection kind. +func (s *Selection) Kind() SelectionKind { return s.kind } + +// Recv returns the type of x in x.f. +func (s *Selection) Recv() Type { return s.recv } + +// Obj returns the object denoted by x.f; a *Var for +// a field selection, and a *Func in all other cases. +func (s *Selection) Obj() Object { return s.obj } + +// Type returns the type of x.f, which may be different from the type of f. +// See Selection for more information. +func (s *Selection) Type() Type { + switch s.kind { + case MethodVal: + // The type of x.f is a method with its receiver type set + // to the type of x. + sig := *s.obj.(*Func).typ.(*Signature) + recv := *sig.recv + recv.typ = s.recv + sig.recv = &recv + return &sig + + case MethodExpr: + // The type of x.f is a function (without receiver) + // and an additional first argument with the same type as x. + // TODO(gri) Similar code is already in call.go - factor! + // TODO(gri) Compute this eagerly to avoid allocations. + sig := *s.obj.(*Func).typ.(*Signature) + arg0 := *sig.recv + sig.recv = nil + arg0.typ = s.recv + var params []*Var + if sig.params != nil { + params = sig.params.vars + } + sig.params = NewTuple(append([]*Var{&arg0}, params...)...) + return &sig + } + + // In all other cases, the type of x.f is the type of x. + return s.obj.Type() +} + +// Index describes the path from x to f in x.f. +// The last index entry is the field or method index of the type declaring f; +// either: +// +// 1) the list of declared methods of a named type; or +// 2) the list of methods of an interface type; or +// 3) the list of fields of a struct type. +// +// The earlier index entries are the indices of the embedded fields implicitly +// traversed to get from (the type of) x to f, starting at embedding depth 0. +func (s *Selection) Index() []int { return s.index } + +// Indirect reports whether any pointer indirection was required to get from +// x to f in x.f. +func (s *Selection) Indirect() bool { return s.indirect } + +func (s *Selection) String() string { return SelectionString(s, nil) } + +// SelectionString returns the string form of s. +// The Qualifier controls the printing of +// package-level objects, and may be nil. +// +// Examples: +// "field (T) f int" +// "method (T) f(X) Y" +// "method expr (T) f(X) Y" +// +func SelectionString(s *Selection, qf Qualifier) string { + var k string + switch s.kind { + case FieldVal: + k = "field " + case MethodVal: + k = "method " + case MethodExpr: + k = "method expr " + default: + unreachable() + } + var buf bytes.Buffer + buf.WriteString(k) + buf.WriteByte('(') + WriteType(&buf, s.Recv(), qf) + fmt.Fprintf(&buf, ") %s", s.obj.Name()) + if T := s.Type(); s.kind == FieldVal { + buf.WriteByte(' ') + WriteType(&buf, T, qf) + } else { + WriteSignature(&buf, T.(*Signature), qf) + } + return buf.String() +} diff --git a/vendor/golang.org/x/tools/go/types/sizes.go b/vendor/golang.org/x/tools/go/types/sizes.go new file mode 100644 index 0000000..56fb310 --- /dev/null +++ b/vendor/golang.org/x/tools/go/types/sizes.go @@ -0,0 +1,211 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// This file implements Sizes. + +package types + +// Sizes defines the sizing functions for package unsafe. +type Sizes interface { + // Alignof returns the alignment of a variable of type T. + // Alignof must implement the alignment guarantees required by the spec. + Alignof(T Type) int64 + + // Offsetsof returns the offsets of the given struct fields, in bytes. + // Offsetsof must implement the offset guarantees required by the spec. + Offsetsof(fields []*Var) []int64 + + // Sizeof returns the size of a variable of type T. + // Sizeof must implement the size guarantees required by the spec. + Sizeof(T Type) int64 +} + +// StdSizes is a convenience type for creating commonly used Sizes. +// It makes the following simplifying assumptions: +// +// - The size of explicitly sized basic types (int16, etc.) is the +// specified size. +// - The size of strings and interfaces is 2*WordSize. +// - The size of slices is 3*WordSize. +// - The size of an array of n elements corresponds to the size of +// a struct of n consecutive fields of the array's element type. +// - The size of a struct is the offset of the last field plus that +// field's size. As with all element types, if the struct is used +// in an array its size must first be aligned to a multiple of the +// struct's alignment. +// - All other types have size WordSize. +// - Arrays and structs are aligned per spec definition; all other +// types are naturally aligned with a maximum alignment MaxAlign. +// +// *StdSizes implements Sizes. +// +type StdSizes struct { + WordSize int64 // word size in bytes - must be >= 4 (32bits) + MaxAlign int64 // maximum alignment in bytes - must be >= 1 +} + +func (s *StdSizes) Alignof(T Type) int64 { + // For arrays and structs, alignment is defined in terms + // of alignment of the elements and fields, respectively. + switch t := T.Underlying().(type) { + case *Array: + // spec: "For a variable x of array type: unsafe.Alignof(x) + // is the same as unsafe.Alignof(x[0]), but at least 1." + return s.Alignof(t.elem) + case *Struct: + // spec: "For a variable x of struct type: unsafe.Alignof(x) + // is the largest of the values unsafe.Alignof(x.f) for each + // field f of x, but at least 1." + max := int64(1) + for _, f := range t.fields { + if a := s.Alignof(f.typ); a > max { + max = a + } + } + return max + } + a := s.Sizeof(T) // may be 0 + // spec: "For a variable x of any type: unsafe.Alignof(x) is at least 1." + if a < 1 { + return 1 + } + if a > s.MaxAlign { + return s.MaxAlign + } + return a +} + +func (s *StdSizes) Offsetsof(fields []*Var) []int64 { + offsets := make([]int64, len(fields)) + var o int64 + for i, f := range fields { + a := s.Alignof(f.typ) + o = align(o, a) + offsets[i] = o + o += s.Sizeof(f.typ) + } + return offsets +} + +var basicSizes = [...]byte{ + Bool: 1, + Int8: 1, + Int16: 2, + Int32: 4, + Int64: 8, + Uint8: 1, + Uint16: 2, + Uint32: 4, + Uint64: 8, + Float32: 4, + Float64: 8, + Complex64: 8, + Complex128: 16, +} + +func (s *StdSizes) Sizeof(T Type) int64 { + switch t := T.Underlying().(type) { + case *Basic: + assert(isTyped(T)) + k := t.kind + if int(k) < len(basicSizes) { + if s := basicSizes[k]; s > 0 { + return int64(s) + } + } + if k == String { + return s.WordSize * 2 + } + case *Array: + n := t.len + if n == 0 { + return 0 + } + a := s.Alignof(t.elem) + z := s.Sizeof(t.elem) + return align(z, a)*(n-1) + z + case *Slice: + return s.WordSize * 3 + case *Struct: + n := t.NumFields() + if n == 0 { + return 0 + } + offsets := t.offsets + if t.offsets == nil { + // compute offsets on demand + offsets = s.Offsetsof(t.fields) + t.offsets = offsets + } + return offsets[n-1] + s.Sizeof(t.fields[n-1].typ) + case *Interface: + return s.WordSize * 2 + } + return s.WordSize // catch-all +} + +// stdSizes is used if Config.Sizes == nil. +var stdSizes = StdSizes{8, 8} + +func (conf *Config) alignof(T Type) int64 { + if s := conf.Sizes; s != nil { + if a := s.Alignof(T); a >= 1 { + return a + } + panic("Config.Sizes.Alignof returned an alignment < 1") + } + return stdSizes.Alignof(T) +} + +func (conf *Config) offsetsof(T *Struct) []int64 { + offsets := T.offsets + if offsets == nil && T.NumFields() > 0 { + // compute offsets on demand + if s := conf.Sizes; s != nil { + offsets = s.Offsetsof(T.fields) + // sanity checks + if len(offsets) != T.NumFields() { + panic("Config.Sizes.Offsetsof returned the wrong number of offsets") + } + for _, o := range offsets { + if o < 0 { + panic("Config.Sizes.Offsetsof returned an offset < 0") + } + } + } else { + offsets = stdSizes.Offsetsof(T.fields) + } + T.offsets = offsets + } + return offsets +} + +// offsetof returns the offset of the field specified via +// the index sequence relative to typ. All embedded fields +// must be structs (rather than pointer to structs). +func (conf *Config) offsetof(typ Type, index []int) int64 { + var o int64 + for _, i := range index { + s := typ.Underlying().(*Struct) + o += conf.offsetsof(s)[i] + typ = s.fields[i].typ + } + return o +} + +func (conf *Config) sizeof(T Type) int64 { + if s := conf.Sizes; s != nil { + if z := s.Sizeof(T); z >= 0 { + return z + } + panic("Config.Sizes.Sizeof returned a size < 0") + } + return stdSizes.Sizeof(T) +} + +// align returns the smallest y >= x such that y % a == 0. +func align(x, a int64) int64 { + y := x + a - 1 + return y - y%a +} diff --git a/vendor/golang.org/x/tools/go/types/stmt.go b/vendor/golang.org/x/tools/go/types/stmt.go new file mode 100644 index 0000000..eeb2c31 --- /dev/null +++ b/vendor/golang.org/x/tools/go/types/stmt.go @@ -0,0 +1,745 @@ +// Copyright 2012 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// This file implements typechecking of statements. + +package types + +import ( + "fmt" + "go/ast" + "go/token" + + "golang.org/x/tools/go/exact" +) + +func (check *Checker) funcBody(decl *declInfo, name string, sig *Signature, body *ast.BlockStmt) { + if trace { + if name == "" { + name = "" + } + fmt.Printf("--- %s: %s {\n", name, sig) + defer fmt.Println("--- ") + } + + // set function scope extent + sig.scope.pos = body.Pos() + sig.scope.end = body.End() + + // save/restore current context and setup function context + // (and use 0 indentation at function start) + defer func(ctxt context, indent int) { + check.context = ctxt + check.indent = indent + }(check.context, check.indent) + check.context = context{ + decl: decl, + scope: sig.scope, + sig: sig, + } + check.indent = 0 + + check.stmtList(0, body.List) + + if check.hasLabel { + check.labels(body) + } + + if sig.results.Len() > 0 && !check.isTerminating(body, "") { + check.error(body.Rbrace, "missing return") + } + + // spec: "Implementation restriction: A compiler may make it illegal to + // declare a variable inside a function body if the variable is never used." + // (One could check each scope after use, but that distributes this check + // over several places because CloseScope is not always called explicitly.) + check.usage(sig.scope) +} + +func (check *Checker) usage(scope *Scope) { + for _, obj := range scope.elems { + if v, _ := obj.(*Var); v != nil && !v.used { + check.softErrorf(v.pos, "%s declared but not used", v.name) + } + } + for _, scope := range scope.children { + check.usage(scope) + } +} + +// stmtContext is a bitset describing which +// control-flow statements are permissible. +type stmtContext uint + +const ( + breakOk stmtContext = 1 << iota + continueOk + fallthroughOk +) + +func (check *Checker) simpleStmt(s ast.Stmt) { + if s != nil { + check.stmt(0, s) + } +} + +func (check *Checker) stmtList(ctxt stmtContext, list []ast.Stmt) { + ok := ctxt&fallthroughOk != 0 + inner := ctxt &^ fallthroughOk + for i, s := range list { + inner := inner + if ok && i+1 == len(list) { + inner |= fallthroughOk + } + check.stmt(inner, s) + } +} + +func (check *Checker) multipleDefaults(list []ast.Stmt) { + var first ast.Stmt + for _, s := range list { + var d ast.Stmt + switch c := s.(type) { + case *ast.CaseClause: + if len(c.List) == 0 { + d = s + } + case *ast.CommClause: + if c.Comm == nil { + d = s + } + default: + check.invalidAST(s.Pos(), "case/communication clause expected") + } + if d != nil { + if first != nil { + check.errorf(d.Pos(), "multiple defaults (first at %s)", first.Pos()) + } else { + first = d + } + } + } +} + +func (check *Checker) openScope(s ast.Stmt, comment string) { + scope := NewScope(check.scope, s.Pos(), s.End(), comment) + check.recordScope(s, scope) + check.scope = scope +} + +func (check *Checker) closeScope() { + check.scope = check.scope.Parent() +} + +func assignOp(op token.Token) token.Token { + // token_test.go verifies the token ordering this function relies on + if token.ADD_ASSIGN <= op && op <= token.AND_NOT_ASSIGN { + return op + (token.ADD - token.ADD_ASSIGN) + } + return token.ILLEGAL +} + +func (check *Checker) suspendedCall(keyword string, call *ast.CallExpr) { + var x operand + var msg string + switch check.rawExpr(&x, call, nil) { + case conversion: + msg = "requires function call, not conversion" + case expression: + msg = "discards result of" + case statement: + return + default: + unreachable() + } + check.errorf(x.pos(), "%s %s %s", keyword, msg, &x) +} + +func (check *Checker) caseValues(x operand /* copy argument (not *operand!) */, values []ast.Expr) { + // No duplicate checking for now. See issue 4524. + for _, e := range values { + var y operand + check.expr(&y, e) + if y.mode == invalid { + return + } + // TODO(gri) The convertUntyped call pair below appears in other places. Factor! + // Order matters: By comparing y against x, error positions are at the case values. + check.convertUntyped(&y, x.typ) + if y.mode == invalid { + return + } + check.convertUntyped(&x, y.typ) + if x.mode == invalid { + return + } + check.comparison(&y, &x, token.EQL) + } +} + +func (check *Checker) caseTypes(x *operand, xtyp *Interface, types []ast.Expr, seen map[Type]token.Pos) (T Type) { +L: + for _, e := range types { + T = check.typOrNil(e) + if T == Typ[Invalid] { + continue + } + // complain about duplicate types + // TODO(gri) use a type hash to avoid quadratic algorithm + for t, pos := range seen { + if T == nil && t == nil || T != nil && t != nil && Identical(T, t) { + // talk about "case" rather than "type" because of nil case + check.error(e.Pos(), "duplicate case in type switch") + check.errorf(pos, "\tprevious case %s", T) // secondary error, \t indented + continue L + } + } + seen[T] = e.Pos() + if T != nil { + check.typeAssertion(e.Pos(), x, xtyp, T) + } + } + return +} + +// stmt typechecks statement s. +func (check *Checker) stmt(ctxt stmtContext, s ast.Stmt) { + // statements cannot use iota in general + // (constant declarations set it explicitly) + assert(check.iota == nil) + + // statements must end with the same top scope as they started with + if debug { + defer func(scope *Scope) { + // don't check if code is panicking + if p := recover(); p != nil { + panic(p) + } + assert(scope == check.scope) + }(check.scope) + } + + inner := ctxt &^ fallthroughOk + switch s := s.(type) { + case *ast.BadStmt, *ast.EmptyStmt: + // ignore + + case *ast.DeclStmt: + check.declStmt(s.Decl) + + case *ast.LabeledStmt: + check.hasLabel = true + check.stmt(ctxt, s.Stmt) + + case *ast.ExprStmt: + // spec: "With the exception of specific built-in functions, + // function and method calls and receive operations can appear + // in statement context. Such statements may be parenthesized." + var x operand + kind := check.rawExpr(&x, s.X, nil) + var msg string + switch x.mode { + default: + if kind == statement { + return + } + msg = "is not used" + case builtin: + msg = "must be called" + case typexpr: + msg = "is not an expression" + } + check.errorf(x.pos(), "%s %s", &x, msg) + + case *ast.SendStmt: + var ch, x operand + check.expr(&ch, s.Chan) + check.expr(&x, s.Value) + if ch.mode == invalid || x.mode == invalid { + return + } + if tch, ok := ch.typ.Underlying().(*Chan); !ok || tch.dir == RecvOnly || !check.assignment(&x, tch.elem) { + if x.mode != invalid { + check.invalidOp(ch.pos(), "cannot send %s to channel %s", &x, &ch) + } + } + + case *ast.IncDecStmt: + var op token.Token + switch s.Tok { + case token.INC: + op = token.ADD + case token.DEC: + op = token.SUB + default: + check.invalidAST(s.TokPos, "unknown inc/dec operation %s", s.Tok) + return + } + var x operand + Y := &ast.BasicLit{ValuePos: s.X.Pos(), Kind: token.INT, Value: "1"} // use x's position + check.binary(&x, nil, s.X, Y, op) + if x.mode == invalid { + return + } + check.assignVar(s.X, &x) + + case *ast.AssignStmt: + switch s.Tok { + case token.ASSIGN, token.DEFINE: + if len(s.Lhs) == 0 { + check.invalidAST(s.Pos(), "missing lhs in assignment") + return + } + if s.Tok == token.DEFINE { + check.shortVarDecl(s.TokPos, s.Lhs, s.Rhs) + } else { + // regular assignment + check.assignVars(s.Lhs, s.Rhs) + } + + default: + // assignment operations + if len(s.Lhs) != 1 || len(s.Rhs) != 1 { + check.errorf(s.TokPos, "assignment operation %s requires single-valued expressions", s.Tok) + return + } + op := assignOp(s.Tok) + if op == token.ILLEGAL { + check.invalidAST(s.TokPos, "unknown assignment operation %s", s.Tok) + return + } + var x operand + check.binary(&x, nil, s.Lhs[0], s.Rhs[0], op) + if x.mode == invalid { + return + } + check.assignVar(s.Lhs[0], &x) + } + + case *ast.GoStmt: + check.suspendedCall("go", s.Call) + + case *ast.DeferStmt: + check.suspendedCall("defer", s.Call) + + case *ast.ReturnStmt: + res := check.sig.results + if res.Len() > 0 { + // function returns results + // (if one, say the first, result parameter is named, all of them are named) + if len(s.Results) == 0 && res.vars[0].name != "" { + // spec: "Implementation restriction: A compiler may disallow an empty expression + // list in a "return" statement if a different entity (constant, type, or variable) + // with the same name as a result parameter is in scope at the place of the return." + for _, obj := range res.vars { + if _, alt := check.scope.LookupParent(obj.name, check.pos); alt != nil && alt != obj { + check.errorf(s.Pos(), "result parameter %s not in scope at return", obj.name) + check.errorf(alt.Pos(), "\tinner declaration of %s", obj) + // ok to continue + } + } + } else { + // return has results or result parameters are unnamed + check.initVars(res.vars, s.Results, s.Return) + } + } else if len(s.Results) > 0 { + check.error(s.Results[0].Pos(), "no result values expected") + check.use(s.Results...) + } + + case *ast.BranchStmt: + if s.Label != nil { + check.hasLabel = true + return // checked in 2nd pass (check.labels) + } + switch s.Tok { + case token.BREAK: + if ctxt&breakOk == 0 { + check.error(s.Pos(), "break not in for, switch, or select statement") + } + case token.CONTINUE: + if ctxt&continueOk == 0 { + check.error(s.Pos(), "continue not in for statement") + } + case token.FALLTHROUGH: + if ctxt&fallthroughOk == 0 { + check.error(s.Pos(), "fallthrough statement out of place") + } + default: + check.invalidAST(s.Pos(), "branch statement: %s", s.Tok) + } + + case *ast.BlockStmt: + check.openScope(s, "block") + defer check.closeScope() + + check.stmtList(inner, s.List) + + case *ast.IfStmt: + check.openScope(s, "if") + defer check.closeScope() + + check.simpleStmt(s.Init) + var x operand + check.expr(&x, s.Cond) + if x.mode != invalid && !isBoolean(x.typ) { + check.error(s.Cond.Pos(), "non-boolean condition in if statement") + } + check.stmt(inner, s.Body) + if s.Else != nil { + check.stmt(inner, s.Else) + } + + case *ast.SwitchStmt: + inner |= breakOk + check.openScope(s, "switch") + defer check.closeScope() + + check.simpleStmt(s.Init) + var x operand + if s.Tag != nil { + check.expr(&x, s.Tag) + } else { + // spec: "A missing switch expression is + // equivalent to the boolean value true." + x.mode = constant + x.typ = Typ[Bool] + x.val = exact.MakeBool(true) + x.expr = &ast.Ident{NamePos: s.Body.Lbrace, Name: "true"} + } + + check.multipleDefaults(s.Body.List) + + for i, c := range s.Body.List { + clause, _ := c.(*ast.CaseClause) + if clause == nil { + check.invalidAST(c.Pos(), "incorrect expression switch case") + continue + } + if x.mode != invalid { + check.caseValues(x, clause.List) + } + check.openScope(clause, "case") + inner := inner + if i+1 < len(s.Body.List) { + inner |= fallthroughOk + } + check.stmtList(inner, clause.Body) + check.closeScope() + } + + case *ast.TypeSwitchStmt: + inner |= breakOk + check.openScope(s, "type switch") + defer check.closeScope() + + check.simpleStmt(s.Init) + + // A type switch guard must be of the form: + // + // TypeSwitchGuard = [ identifier ":=" ] PrimaryExpr "." "(" "type" ")" . + // + // The parser is checking syntactic correctness; + // remaining syntactic errors are considered AST errors here. + // TODO(gri) better factoring of error handling (invalid ASTs) + // + var lhs *ast.Ident // lhs identifier or nil + var rhs ast.Expr + switch guard := s.Assign.(type) { + case *ast.ExprStmt: + rhs = guard.X + case *ast.AssignStmt: + if len(guard.Lhs) != 1 || guard.Tok != token.DEFINE || len(guard.Rhs) != 1 { + check.invalidAST(s.Pos(), "incorrect form of type switch guard") + return + } + + lhs, _ = guard.Lhs[0].(*ast.Ident) + if lhs == nil { + check.invalidAST(s.Pos(), "incorrect form of type switch guard") + return + } + + if lhs.Name == "_" { + // _ := x.(type) is an invalid short variable declaration + check.softErrorf(lhs.Pos(), "no new variable on left side of :=") + lhs = nil // avoid declared but not used error below + } else { + check.recordDef(lhs, nil) // lhs variable is implicitly declared in each cause clause + } + + rhs = guard.Rhs[0] + + default: + check.invalidAST(s.Pos(), "incorrect form of type switch guard") + return + } + + // rhs must be of the form: expr.(type) and expr must be an interface + expr, _ := rhs.(*ast.TypeAssertExpr) + if expr == nil || expr.Type != nil { + check.invalidAST(s.Pos(), "incorrect form of type switch guard") + return + } + var x operand + check.expr(&x, expr.X) + if x.mode == invalid { + return + } + xtyp, _ := x.typ.Underlying().(*Interface) + if xtyp == nil { + check.errorf(x.pos(), "%s is not an interface", &x) + return + } + + check.multipleDefaults(s.Body.List) + + var lhsVars []*Var // list of implicitly declared lhs variables + seen := make(map[Type]token.Pos) // map of seen types to positions + for _, s := range s.Body.List { + clause, _ := s.(*ast.CaseClause) + if clause == nil { + check.invalidAST(s.Pos(), "incorrect type switch case") + continue + } + // Check each type in this type switch case. + T := check.caseTypes(&x, xtyp, clause.List, seen) + check.openScope(clause, "case") + // If lhs exists, declare a corresponding variable in the case-local scope. + if lhs != nil { + // spec: "The TypeSwitchGuard may include a short variable declaration. + // When that form is used, the variable is declared at the beginning of + // the implicit block in each clause. In clauses with a case listing + // exactly one type, the variable has that type; otherwise, the variable + // has the type of the expression in the TypeSwitchGuard." + if len(clause.List) != 1 || T == nil { + T = x.typ + } + obj := NewVar(lhs.Pos(), check.pkg, lhs.Name, T) + scopePos := clause.End() + if len(clause.Body) > 0 { + scopePos = clause.Body[0].Pos() + } + check.declare(check.scope, nil, obj, scopePos) + check.recordImplicit(clause, obj) + // For the "declared but not used" error, all lhs variables act as + // one; i.e., if any one of them is 'used', all of them are 'used'. + // Collect them for later analysis. + lhsVars = append(lhsVars, obj) + } + check.stmtList(inner, clause.Body) + check.closeScope() + } + + // If lhs exists, we must have at least one lhs variable that was used. + if lhs != nil { + var used bool + for _, v := range lhsVars { + if v.used { + used = true + } + v.used = true // avoid usage error when checking entire function + } + if !used { + check.softErrorf(lhs.Pos(), "%s declared but not used", lhs.Name) + } + } + + case *ast.SelectStmt: + inner |= breakOk + + check.multipleDefaults(s.Body.List) + + for _, s := range s.Body.List { + clause, _ := s.(*ast.CommClause) + if clause == nil { + continue // error reported before + } + + // clause.Comm must be a SendStmt, RecvStmt, or default case + valid := false + var rhs ast.Expr // rhs of RecvStmt, or nil + switch s := clause.Comm.(type) { + case nil, *ast.SendStmt: + valid = true + case *ast.AssignStmt: + if len(s.Rhs) == 1 { + rhs = s.Rhs[0] + } + case *ast.ExprStmt: + rhs = s.X + } + + // if present, rhs must be a receive operation + if rhs != nil { + if x, _ := unparen(rhs).(*ast.UnaryExpr); x != nil && x.Op == token.ARROW { + valid = true + } + } + + if !valid { + check.error(clause.Comm.Pos(), "select case must be send or receive (possibly with assignment)") + continue + } + + check.openScope(s, "case") + if clause.Comm != nil { + check.stmt(inner, clause.Comm) + } + check.stmtList(inner, clause.Body) + check.closeScope() + } + + case *ast.ForStmt: + inner |= breakOk | continueOk + check.openScope(s, "for") + defer check.closeScope() + + check.simpleStmt(s.Init) + if s.Cond != nil { + var x operand + check.expr(&x, s.Cond) + if x.mode != invalid && !isBoolean(x.typ) { + check.error(s.Cond.Pos(), "non-boolean condition in for statement") + } + } + check.simpleStmt(s.Post) + // spec: "The init statement may be a short variable + // declaration, but the post statement must not." + if s, _ := s.Post.(*ast.AssignStmt); s != nil && s.Tok == token.DEFINE { + check.softErrorf(s.Pos(), "cannot declare in post statement") + check.use(s.Lhs...) // avoid follow-up errors + } + check.stmt(inner, s.Body) + + case *ast.RangeStmt: + inner |= breakOk | continueOk + check.openScope(s, "for") + defer check.closeScope() + + // check expression to iterate over + var x operand + check.expr(&x, s.X) + + // determine key/value types + var key, val Type + if x.mode != invalid { + switch typ := x.typ.Underlying().(type) { + case *Basic: + if isString(typ) { + key = Typ[Int] + val = universeRune // use 'rune' name + } + case *Array: + key = Typ[Int] + val = typ.elem + case *Slice: + key = Typ[Int] + val = typ.elem + case *Pointer: + if typ, _ := typ.base.Underlying().(*Array); typ != nil { + key = Typ[Int] + val = typ.elem + } + case *Map: + key = typ.key + val = typ.elem + case *Chan: + key = typ.elem + val = Typ[Invalid] + if typ.dir == SendOnly { + check.errorf(x.pos(), "cannot range over send-only channel %s", &x) + // ok to continue + } + if s.Value != nil { + check.errorf(s.Value.Pos(), "iteration over %s permits only one iteration variable", &x) + // ok to continue + } + } + } + + if key == nil { + check.errorf(x.pos(), "cannot range over %s", &x) + // ok to continue + } + + // check assignment to/declaration of iteration variables + // (irregular assignment, cannot easily map to existing assignment checks) + + // lhs expressions and initialization value (rhs) types + lhs := [2]ast.Expr{s.Key, s.Value} + rhs := [2]Type{key, val} // key, val may be nil + + if s.Tok == token.DEFINE { + // short variable declaration; variable scope starts after the range clause + // (the for loop opens a new scope, so variables on the lhs never redeclare + // previously declared variables) + var vars []*Var + for i, lhs := range lhs { + if lhs == nil { + continue + } + + // determine lhs variable + var obj *Var + if ident, _ := lhs.(*ast.Ident); ident != nil { + // declare new variable + name := ident.Name + obj = NewVar(ident.Pos(), check.pkg, name, nil) + check.recordDef(ident, obj) + // _ variables don't count as new variables + if name != "_" { + vars = append(vars, obj) + } + } else { + check.errorf(lhs.Pos(), "cannot declare %s", lhs) + obj = NewVar(lhs.Pos(), check.pkg, "_", nil) // dummy variable + } + + // initialize lhs variable + if typ := rhs[i]; typ != nil { + x.mode = value + x.expr = lhs // we don't have a better rhs expression to use here + x.typ = typ + check.initVar(obj, &x, false) + } else { + obj.typ = Typ[Invalid] + obj.used = true // don't complain about unused variable + } + } + + // declare variables + if len(vars) > 0 { + for _, obj := range vars { + // spec: "The scope of a constant or variable identifier declared inside + // a function begins at the end of the ConstSpec or VarSpec (ShortVarDecl + // for short variable declarations) and ends at the end of the innermost + // containing block." + scopePos := s.End() + check.declare(check.scope, nil /* recordDef already called */, obj, scopePos) + } + } else { + check.error(s.TokPos, "no new variables on left side of :=") + } + } else { + // ordinary assignment + for i, lhs := range lhs { + if lhs == nil { + continue + } + if typ := rhs[i]; typ != nil { + x.mode = value + x.expr = lhs // we don't have a better rhs expression to use here + x.typ = typ + check.assignVar(lhs, &x) + } + } + } + + check.stmt(inner, s.Body) + + default: + check.error(s.Pos(), "invalid statement") + } +} diff --git a/vendor/golang.org/x/tools/go/types/type.go b/vendor/golang.org/x/tools/go/types/type.go new file mode 100644 index 0000000..1df8b45 --- /dev/null +++ b/vendor/golang.org/x/tools/go/types/type.go @@ -0,0 +1,454 @@ +// Copyright 2011 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package types + +import "sort" + +// TODO(gri) Revisit factory functions - make sure they have all relevant parameters. + +// A Type represents a type of Go. +// All types implement the Type interface. +type Type interface { + // Underlying returns the underlying type of a type. + Underlying() Type + + // String returns a string representation of a type. + String() string +} + +// BasicKind describes the kind of basic type. +type BasicKind int + +const ( + Invalid BasicKind = iota // type is invalid + + // predeclared types + Bool + Int + Int8 + Int16 + Int32 + Int64 + Uint + Uint8 + Uint16 + Uint32 + Uint64 + Uintptr + Float32 + Float64 + Complex64 + Complex128 + String + UnsafePointer + + // types for untyped values + UntypedBool + UntypedInt + UntypedRune + UntypedFloat + UntypedComplex + UntypedString + UntypedNil + + // aliases + Byte = Uint8 + Rune = Int32 +) + +// BasicInfo is a set of flags describing properties of a basic type. +type BasicInfo int + +// Properties of basic types. +const ( + IsBoolean BasicInfo = 1 << iota + IsInteger + IsUnsigned + IsFloat + IsComplex + IsString + IsUntyped + + IsOrdered = IsInteger | IsFloat | IsString + IsNumeric = IsInteger | IsFloat | IsComplex + IsConstType = IsBoolean | IsNumeric | IsString +) + +// A Basic represents a basic type. +type Basic struct { + kind BasicKind + info BasicInfo + name string +} + +// Kind returns the kind of basic type b. +func (b *Basic) Kind() BasicKind { return b.kind } + +// Info returns information about properties of basic type b. +func (b *Basic) Info() BasicInfo { return b.info } + +// Name returns the name of basic type b. +func (b *Basic) Name() string { return b.name } + +// An Array represents an array type. +type Array struct { + len int64 + elem Type +} + +// NewArray returns a new array type for the given element type and length. +func NewArray(elem Type, len int64) *Array { return &Array{len, elem} } + +// Len returns the length of array a. +func (a *Array) Len() int64 { return a.len } + +// Elem returns element type of array a. +func (a *Array) Elem() Type { return a.elem } + +// A Slice represents a slice type. +type Slice struct { + elem Type +} + +// NewSlice returns a new slice type for the given element type. +func NewSlice(elem Type) *Slice { return &Slice{elem} } + +// Elem returns the element type of slice s. +func (s *Slice) Elem() Type { return s.elem } + +// A Struct represents a struct type. +type Struct struct { + fields []*Var + tags []string // field tags; nil if there are no tags + // TODO(gri) access to offsets is not threadsafe - fix this + offsets []int64 // field offsets in bytes, lazily initialized +} + +// NewStruct returns a new struct with the given fields and corresponding field tags. +// If a field with index i has a tag, tags[i] must be that tag, but len(tags) may be +// only as long as required to hold the tag with the largest index i. Consequently, +// if no field has a tag, tags may be nil. +func NewStruct(fields []*Var, tags []string) *Struct { + var fset objset + for _, f := range fields { + if f.name != "_" && fset.insert(f) != nil { + panic("multiple fields with the same name") + } + } + if len(tags) > len(fields) { + panic("more tags than fields") + } + return &Struct{fields: fields, tags: tags} +} + +// NumFields returns the number of fields in the struct (including blank and anonymous fields). +func (s *Struct) NumFields() int { return len(s.fields) } + +// Field returns the i'th field for 0 <= i < NumFields(). +func (s *Struct) Field(i int) *Var { return s.fields[i] } + +// Tag returns the i'th field tag for 0 <= i < NumFields(). +func (s *Struct) Tag(i int) string { + if i < len(s.tags) { + return s.tags[i] + } + return "" +} + +// A Pointer represents a pointer type. +type Pointer struct { + base Type // element type +} + +// NewPointer returns a new pointer type for the given element (base) type. +func NewPointer(elem Type) *Pointer { return &Pointer{base: elem} } + +// Elem returns the element type for the given pointer p. +func (p *Pointer) Elem() Type { return p.base } + +// A Tuple represents an ordered list of variables; a nil *Tuple is a valid (empty) tuple. +// Tuples are used as components of signatures and to represent the type of multiple +// assignments; they are not first class types of Go. +type Tuple struct { + vars []*Var +} + +// NewTuple returns a new tuple for the given variables. +func NewTuple(x ...*Var) *Tuple { + if len(x) > 0 { + return &Tuple{x} + } + return nil +} + +// Len returns the number variables of tuple t. +func (t *Tuple) Len() int { + if t != nil { + return len(t.vars) + } + return 0 +} + +// At returns the i'th variable of tuple t. +func (t *Tuple) At(i int) *Var { return t.vars[i] } + +// A Signature represents a (non-builtin) function or method type. +type Signature struct { + // We need to keep the scope in Signature (rather than passing it around + // and store it in the Func Object) because when type-checking a function + // literal we call the general type checker which returns a general Type. + // We then unpack the *Signature and use the scope for the literal body. + scope *Scope // function scope, present for package-local signatures + recv *Var // nil if not a method + params *Tuple // (incoming) parameters from left to right; or nil + results *Tuple // (outgoing) results from left to right; or nil + variadic bool // true if the last parameter's type is of the form ...T (or string, for append built-in only) +} + +// NewSignature returns a new function type for the given receiver, parameters, +// and results, either of which may be nil. If variadic is set, the function +// is variadic, it must have at least one parameter, and the last parameter +// must be of unnamed slice type. +func NewSignature(recv *Var, params, results *Tuple, variadic bool) *Signature { + if variadic { + n := params.Len() + if n == 0 { + panic("types.NewSignature: variadic function must have at least one parameter") + } + if _, ok := params.At(n - 1).typ.(*Slice); !ok { + panic("types.NewSignature: variadic parameter must be of unnamed slice type") + } + } + return &Signature{nil, recv, params, results, variadic} +} + +// Recv returns the receiver of signature s (if a method), or nil if a +// function. +// +// For an abstract method, Recv returns the enclosing interface either +// as a *Named or an *Interface. Due to embedding, an interface may +// contain methods whose receiver type is a different interface. +func (s *Signature) Recv() *Var { return s.recv } + +// Params returns the parameters of signature s, or nil. +func (s *Signature) Params() *Tuple { return s.params } + +// Results returns the results of signature s, or nil. +func (s *Signature) Results() *Tuple { return s.results } + +// Variadic reports whether the signature s is variadic. +func (s *Signature) Variadic() bool { return s.variadic } + +// An Interface represents an interface type. +type Interface struct { + methods []*Func // ordered list of explicitly declared methods + embeddeds []*Named // ordered list of explicitly embedded types + + allMethods []*Func // ordered list of methods declared with or embedded in this interface (TODO(gri): replace with mset) +} + +// NewInterface returns a new interface for the given methods and embedded types. +func NewInterface(methods []*Func, embeddeds []*Named) *Interface { + typ := new(Interface) + + var mset objset + for _, m := range methods { + if mset.insert(m) != nil { + panic("multiple methods with the same name") + } + // set receiver + // TODO(gri) Ideally, we should use a named type here instead of + // typ, for less verbose printing of interface method signatures. + m.typ.(*Signature).recv = NewVar(m.pos, m.pkg, "", typ) + } + sort.Sort(byUniqueMethodName(methods)) + + if embeddeds == nil { + sort.Sort(byUniqueTypeName(embeddeds)) + } + + typ.methods = methods + typ.embeddeds = embeddeds + return typ +} + +// NumExplicitMethods returns the number of explicitly declared methods of interface t. +func (t *Interface) NumExplicitMethods() int { return len(t.methods) } + +// ExplicitMethod returns the i'th explicitly declared method of interface t for 0 <= i < t.NumExplicitMethods(). +// The methods are ordered by their unique Id. +func (t *Interface) ExplicitMethod(i int) *Func { return t.methods[i] } + +// NumEmbeddeds returns the number of embedded types in interface t. +func (t *Interface) NumEmbeddeds() int { return len(t.embeddeds) } + +// Embedded returns the i'th embedded type of interface t for 0 <= i < t.NumEmbeddeds(). +// The types are ordered by the corresponding TypeName's unique Id. +func (t *Interface) Embedded(i int) *Named { return t.embeddeds[i] } + +// NumMethods returns the total number of methods of interface t. +func (t *Interface) NumMethods() int { return len(t.allMethods) } + +// Method returns the i'th method of interface t for 0 <= i < t.NumMethods(). +// The methods are ordered by their unique Id. +func (t *Interface) Method(i int) *Func { return t.allMethods[i] } + +// Empty returns true if t is the empty interface. +func (t *Interface) Empty() bool { return len(t.allMethods) == 0 } + +// Complete computes the interface's method set. It must be called by users of +// NewInterface after the interface's embedded types are fully defined and +// before using the interface type in any way other than to form other types. +// Complete returns the receiver. +func (t *Interface) Complete() *Interface { + if t.allMethods != nil { + return t + } + + var allMethods []*Func + if t.embeddeds == nil { + if t.methods == nil { + allMethods = make([]*Func, 0, 1) + } else { + allMethods = t.methods + } + } else { + allMethods = append(allMethods, t.methods...) + for _, et := range t.embeddeds { + it := et.Underlying().(*Interface) + it.Complete() + for _, tm := range it.allMethods { + // Make a copy of the method and adjust its receiver type. + newm := *tm + newmtyp := *tm.typ.(*Signature) + newm.typ = &newmtyp + newmtyp.recv = NewVar(newm.pos, newm.pkg, "", t) + allMethods = append(allMethods, &newm) + } + } + sort.Sort(byUniqueMethodName(allMethods)) + } + t.allMethods = allMethods + + return t +} + +// A Map represents a map type. +type Map struct { + key, elem Type +} + +// NewMap returns a new map for the given key and element types. +func NewMap(key, elem Type) *Map { + return &Map{key, elem} +} + +// Key returns the key type of map m. +func (m *Map) Key() Type { return m.key } + +// Elem returns the element type of map m. +func (m *Map) Elem() Type { return m.elem } + +// A Chan represents a channel type. +type Chan struct { + dir ChanDir + elem Type +} + +// A ChanDir value indicates a channel direction. +type ChanDir int + +// The direction of a channel is indicated by one of the following constants. +const ( + SendRecv ChanDir = iota + SendOnly + RecvOnly +) + +// NewChan returns a new channel type for the given direction and element type. +func NewChan(dir ChanDir, elem Type) *Chan { + return &Chan{dir, elem} +} + +// Dir returns the direction of channel c. +func (c *Chan) Dir() ChanDir { return c.dir } + +// Elem returns the element type of channel c. +func (c *Chan) Elem() Type { return c.elem } + +// A Named represents a named type. +type Named struct { + obj *TypeName // corresponding declared object + underlying Type // possibly a *Named during setup; never a *Named once set up completely + methods []*Func // methods declared for this type (not the method set of this type) +} + +// NewNamed returns a new named type for the given type name, underlying type, and associated methods. +// The underlying type must not be a *Named. +func NewNamed(obj *TypeName, underlying Type, methods []*Func) *Named { + if _, ok := underlying.(*Named); ok { + panic("types.NewNamed: underlying type must not be *Named") + } + typ := &Named{obj: obj, underlying: underlying, methods: methods} + if obj.typ == nil { + obj.typ = typ + } + return typ +} + +// TypeName returns the type name for the named type t. +func (t *Named) Obj() *TypeName { return t.obj } + +// NumMethods returns the number of explicit methods whose receiver is named type t. +func (t *Named) NumMethods() int { return len(t.methods) } + +// Method returns the i'th method of named type t for 0 <= i < t.NumMethods(). +func (t *Named) Method(i int) *Func { return t.methods[i] } + +// SetUnderlying sets the underlying type and marks t as complete. +// TODO(gri) determine if there's a better solution rather than providing this function +func (t *Named) SetUnderlying(underlying Type) { + if underlying == nil { + panic("types.Named.SetUnderlying: underlying type must not be nil") + } + if _, ok := underlying.(*Named); ok { + panic("types.Named.SetUnderlying: underlying type must not be *Named") + } + t.underlying = underlying +} + +// AddMethod adds method m unless it is already in the method list. +// TODO(gri) find a better solution instead of providing this function +func (t *Named) AddMethod(m *Func) { + if i, _ := lookupMethod(t.methods, m.pkg, m.name); i < 0 { + t.methods = append(t.methods, m) + } +} + +// Implementations for Type methods. + +func (t *Basic) Underlying() Type { return t } +func (t *Array) Underlying() Type { return t } +func (t *Slice) Underlying() Type { return t } +func (t *Struct) Underlying() Type { return t } +func (t *Pointer) Underlying() Type { return t } +func (t *Tuple) Underlying() Type { return t } +func (t *Signature) Underlying() Type { return t } +func (t *Interface) Underlying() Type { return t } +func (t *Map) Underlying() Type { return t } +func (t *Chan) Underlying() Type { return t } +func (t *Named) Underlying() Type { return t.underlying } + +func (t *Basic) String() string { return TypeString(t, nil) } +func (t *Array) String() string { return TypeString(t, nil) } +func (t *Slice) String() string { return TypeString(t, nil) } +func (t *Struct) String() string { return TypeString(t, nil) } +func (t *Pointer) String() string { return TypeString(t, nil) } +func (t *Tuple) String() string { return TypeString(t, nil) } +func (t *Signature) String() string { return TypeString(t, nil) } +func (t *Interface) String() string { return TypeString(t, nil) } +func (t *Map) String() string { return TypeString(t, nil) } +func (t *Chan) String() string { return TypeString(t, nil) } +func (t *Named) String() string { return TypeString(t, nil) } diff --git a/vendor/golang.org/x/tools/go/types/typestring.go b/vendor/golang.org/x/tools/go/types/typestring.go new file mode 100644 index 0000000..abee8ab --- /dev/null +++ b/vendor/golang.org/x/tools/go/types/typestring.go @@ -0,0 +1,292 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// This file implements printing of types. + +package types + +import ( + "bytes" + "fmt" +) + +// A Qualifier controls how named package-level objects are printed in +// calls to TypeString, ObjectString, and SelectionString. +// +// These three formatting routines call the Qualifier for each +// package-level object O, and if the Qualifier returns a non-empty +// string p, the object is printed in the form p.O. +// If it returns an empty string, only the object name O is printed. +// +// Using a nil Qualifier is equivalent to using (*Package).Path: the +// object is qualified by the import path, e.g., "encoding/json.Marshal". +// +type Qualifier func(*Package) string + +// RelativeTo(pkg) returns a Qualifier that fully qualifies members of +// all packages other than pkg. +func RelativeTo(pkg *Package) Qualifier { + if pkg == nil { + return nil + } + return func(other *Package) string { + if pkg == other { + return "" // same package; unqualified + } + return other.Path() + } +} + +// If GcCompatibilityMode is set, printing of types is modified +// to match the representation of some types in the gc compiler: +// +// - byte and rune lose their alias name and simply stand for +// uint8 and int32 respectively +// - embedded interfaces get flattened (the embedding info is lost, +// and certain recursive interface types cannot be printed anymore) +// +// This makes it easier to compare packages computed with the type- +// checker vs packages imported from gc export data. +// +// Caution: This flag affects all uses of WriteType, globally. +// It is only provided for testing in conjunction with +// gc-generated data. It may be removed at any time. +var GcCompatibilityMode bool + +// TypeString returns the string representation of typ. +// The Qualifier controls the printing of +// package-level objects, and may be nil. +func TypeString(typ Type, qf Qualifier) string { + var buf bytes.Buffer + WriteType(&buf, typ, qf) + return buf.String() +} + +// WriteType writes the string representation of typ to buf. +// The Qualifier controls the printing of +// package-level objects, and may be nil. +func WriteType(buf *bytes.Buffer, typ Type, qf Qualifier) { + writeType(buf, typ, qf, make([]Type, 8)) +} + +func writeType(buf *bytes.Buffer, typ Type, qf Qualifier, visited []Type) { + // Theoretically, this is a quadratic lookup algorithm, but in + // practice deeply nested composite types with unnamed component + // types are uncommon. This code is likely more efficient than + // using a map. + for _, t := range visited { + if t == typ { + fmt.Fprintf(buf, "○%T", typ) // cycle to typ + return + } + } + visited = append(visited, typ) + + switch t := typ.(type) { + case nil: + buf.WriteString("") + + case *Basic: + if t.kind == UnsafePointer { + buf.WriteString("unsafe.") + } + if GcCompatibilityMode { + // forget the alias names + switch t.kind { + case Byte: + t = Typ[Uint8] + case Rune: + t = Typ[Int32] + } + } + buf.WriteString(t.name) + + case *Array: + fmt.Fprintf(buf, "[%d]", t.len) + writeType(buf, t.elem, qf, visited) + + case *Slice: + buf.WriteString("[]") + writeType(buf, t.elem, qf, visited) + + case *Struct: + buf.WriteString("struct{") + for i, f := range t.fields { + if i > 0 { + buf.WriteString("; ") + } + if !f.anonymous { + buf.WriteString(f.name) + buf.WriteByte(' ') + } + writeType(buf, f.typ, qf, visited) + if tag := t.Tag(i); tag != "" { + fmt.Fprintf(buf, " %q", tag) + } + } + buf.WriteByte('}') + + case *Pointer: + buf.WriteByte('*') + writeType(buf, t.base, qf, visited) + + case *Tuple: + writeTuple(buf, t, false, qf, visited) + + case *Signature: + buf.WriteString("func") + writeSignature(buf, t, qf, visited) + + case *Interface: + // We write the source-level methods and embedded types rather + // than the actual method set since resolved method signatures + // may have non-printable cycles if parameters have anonymous + // interface types that (directly or indirectly) embed the + // current interface. For instance, consider the result type + // of m: + // + // type T interface{ + // m() interface{ T } + // } + // + buf.WriteString("interface{") + if GcCompatibilityMode { + // print flattened interface + // (useful to compare against gc-generated interfaces) + for i, m := range t.allMethods { + if i > 0 { + buf.WriteString("; ") + } + buf.WriteString(m.name) + writeSignature(buf, m.typ.(*Signature), qf, visited) + } + } else { + // print explicit interface methods and embedded types + for i, m := range t.methods { + if i > 0 { + buf.WriteString("; ") + } + buf.WriteString(m.name) + writeSignature(buf, m.typ.(*Signature), qf, visited) + } + for i, typ := range t.embeddeds { + if i > 0 || len(t.methods) > 0 { + buf.WriteString("; ") + } + writeType(buf, typ, qf, visited) + } + } + buf.WriteByte('}') + + case *Map: + buf.WriteString("map[") + writeType(buf, t.key, qf, visited) + buf.WriteByte(']') + writeType(buf, t.elem, qf, visited) + + case *Chan: + var s string + var parens bool + switch t.dir { + case SendRecv: + s = "chan " + // chan (<-chan T) requires parentheses + if c, _ := t.elem.(*Chan); c != nil && c.dir == RecvOnly { + parens = true + } + case SendOnly: + s = "chan<- " + case RecvOnly: + s = "<-chan " + default: + panic("unreachable") + } + buf.WriteString(s) + if parens { + buf.WriteByte('(') + } + writeType(buf, t.elem, qf, visited) + if parens { + buf.WriteByte(')') + } + + case *Named: + s := "" + if obj := t.obj; obj != nil { + if obj.pkg != nil { + writePackage(buf, obj.pkg, qf) + } + // TODO(gri): function-local named types should be displayed + // differently from named types at package level to avoid + // ambiguity. + s = obj.name + } + buf.WriteString(s) + + default: + // For externally defined implementations of Type. + buf.WriteString(t.String()) + } +} + +func writeTuple(buf *bytes.Buffer, tup *Tuple, variadic bool, qf Qualifier, visited []Type) { + buf.WriteByte('(') + if tup != nil { + for i, v := range tup.vars { + if i > 0 { + buf.WriteString(", ") + } + if v.name != "" { + buf.WriteString(v.name) + buf.WriteByte(' ') + } + typ := v.typ + if variadic && i == len(tup.vars)-1 { + if s, ok := typ.(*Slice); ok { + buf.WriteString("...") + typ = s.elem + } else { + // special case: + // append(s, "foo"...) leads to signature func([]byte, string...) + if t, ok := typ.Underlying().(*Basic); !ok || t.kind != String { + panic("internal error: string type expected") + } + writeType(buf, typ, qf, visited) + buf.WriteString("...") + continue + } + } + writeType(buf, typ, qf, visited) + } + } + buf.WriteByte(')') +} + +// WriteSignature writes the representation of the signature sig to buf, +// without a leading "func" keyword. +// The Qualifier controls the printing of +// package-level objects, and may be nil. +func WriteSignature(buf *bytes.Buffer, sig *Signature, qf Qualifier) { + writeSignature(buf, sig, qf, make([]Type, 8)) +} + +func writeSignature(buf *bytes.Buffer, sig *Signature, qf Qualifier, visited []Type) { + writeTuple(buf, sig.params, sig.variadic, qf, visited) + + n := sig.results.Len() + if n == 0 { + // no result + return + } + + buf.WriteByte(' ') + if n == 1 && sig.results.vars[0].name == "" { + // single unnamed result + writeType(buf, sig.results.vars[0].typ, qf, visited) + return + } + + // multiple or named result(s) + writeTuple(buf, sig.results, false, qf, visited) +} diff --git a/vendor/golang.org/x/tools/go/types/typeutil/imports.go b/vendor/golang.org/x/tools/go/types/typeutil/imports.go new file mode 100644 index 0000000..967fe1e --- /dev/null +++ b/vendor/golang.org/x/tools/go/types/typeutil/imports.go @@ -0,0 +1,31 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package typeutil + +import "golang.org/x/tools/go/types" + +// Dependencies returns all dependencies of the specified packages. +// +// Dependent packages appear in topological order: if package P imports +// package Q, Q appears earlier than P in the result. +// The algorithm follows import statements in the order they +// appear in the source code, so the result is a total order. +// +func Dependencies(pkgs ...*types.Package) []*types.Package { + var result []*types.Package + seen := make(map[*types.Package]bool) + var visit func(pkgs []*types.Package) + visit = func(pkgs []*types.Package) { + for _, p := range pkgs { + if !seen[p] { + seen[p] = true + visit(p.Imports()) + result = append(result, p) + } + } + } + visit(pkgs) + return result +} diff --git a/vendor/golang.org/x/tools/go/types/typeutil/map.go b/vendor/golang.org/x/tools/go/types/typeutil/map.go new file mode 100644 index 0000000..b3a04cc --- /dev/null +++ b/vendor/golang.org/x/tools/go/types/typeutil/map.go @@ -0,0 +1,314 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package typeutil defines various utilities for types, such as Map, +// a mapping from types.Type to interface{} values. +package typeutil // import "golang.org/x/tools/go/types/typeutil" + +import ( + "bytes" + "fmt" + "reflect" + + "golang.org/x/tools/go/types" +) + +// Map is a hash-table-based mapping from types (types.Type) to +// arbitrary interface{} values. The concrete types that implement +// the Type interface are pointers. Since they are not canonicalized, +// == cannot be used to check for equivalence, and thus we cannot +// simply use a Go map. +// +// Just as with map[K]V, a nil *Map is a valid empty map. +// +// Not thread-safe. +// +type Map struct { + hasher Hasher // shared by many Maps + table map[uint32][]entry // maps hash to bucket; entry.key==nil means unused + length int // number of map entries +} + +// entry is an entry (key/value association) in a hash bucket. +type entry struct { + key types.Type + value interface{} +} + +// SetHasher sets the hasher used by Map. +// +// All Hashers are functionally equivalent but contain internal state +// used to cache the results of hashing previously seen types. +// +// A single Hasher created by MakeHasher() may be shared among many +// Maps. This is recommended if the instances have many keys in +// common, as it will amortize the cost of hash computation. +// +// A Hasher may grow without bound as new types are seen. Even when a +// type is deleted from the map, the Hasher never shrinks, since other +// types in the map may reference the deleted type indirectly. +// +// Hashers are not thread-safe, and read-only operations such as +// Map.Lookup require updates to the hasher, so a full Mutex lock (not a +// read-lock) is require around all Map operations if a shared +// hasher is accessed from multiple threads. +// +// If SetHasher is not called, the Map will create a private hasher at +// the first call to Insert. +// +func (m *Map) SetHasher(hasher Hasher) { + m.hasher = hasher +} + +// Delete removes the entry with the given key, if any. +// It returns true if the entry was found. +// +func (m *Map) Delete(key types.Type) bool { + if m != nil && m.table != nil { + hash := m.hasher.Hash(key) + bucket := m.table[hash] + for i, e := range bucket { + if e.key != nil && types.Identical(key, e.key) { + // We can't compact the bucket as it + // would disturb iterators. + bucket[i] = entry{} + m.length-- + return true + } + } + } + return false +} + +// At returns the map entry for the given key. +// The result is nil if the entry is not present. +// +func (m *Map) At(key types.Type) interface{} { + if m != nil && m.table != nil { + for _, e := range m.table[m.hasher.Hash(key)] { + if e.key != nil && types.Identical(key, e.key) { + return e.value + } + } + } + return nil +} + +// Set sets the map entry for key to val, +// and returns the previous entry, if any. +func (m *Map) Set(key types.Type, value interface{}) (prev interface{}) { + if m.table != nil { + hash := m.hasher.Hash(key) + bucket := m.table[hash] + var hole *entry + for i, e := range bucket { + if e.key == nil { + hole = &bucket[i] + } else if types.Identical(key, e.key) { + prev = e.value + bucket[i].value = value + return + } + } + + if hole != nil { + *hole = entry{key, value} // overwrite deleted entry + } else { + m.table[hash] = append(bucket, entry{key, value}) + } + } else { + if m.hasher.memo == nil { + m.hasher = MakeHasher() + } + hash := m.hasher.Hash(key) + m.table = map[uint32][]entry{hash: {entry{key, value}}} + } + + m.length++ + return +} + +// Len returns the number of map entries. +func (m *Map) Len() int { + if m != nil { + return m.length + } + return 0 +} + +// Iterate calls function f on each entry in the map in unspecified order. +// +// If f should mutate the map, Iterate provides the same guarantees as +// Go maps: if f deletes a map entry that Iterate has not yet reached, +// f will not be invoked for it, but if f inserts a map entry that +// Iterate has not yet reached, whether or not f will be invoked for +// it is unspecified. +// +func (m *Map) Iterate(f func(key types.Type, value interface{})) { + if m != nil { + for _, bucket := range m.table { + for _, e := range bucket { + if e.key != nil { + f(e.key, e.value) + } + } + } + } +} + +// Keys returns a new slice containing the set of map keys. +// The order is unspecified. +func (m *Map) Keys() []types.Type { + keys := make([]types.Type, 0, m.Len()) + m.Iterate(func(key types.Type, _ interface{}) { + keys = append(keys, key) + }) + return keys +} + +func (m *Map) toString(values bool) string { + if m == nil { + return "{}" + } + var buf bytes.Buffer + fmt.Fprint(&buf, "{") + sep := "" + m.Iterate(func(key types.Type, value interface{}) { + fmt.Fprint(&buf, sep) + sep = ", " + fmt.Fprint(&buf, key) + if values { + fmt.Fprintf(&buf, ": %q", value) + } + }) + fmt.Fprint(&buf, "}") + return buf.String() +} + +// String returns a string representation of the map's entries. +// Values are printed using fmt.Sprintf("%v", v). +// Order is unspecified. +// +func (m *Map) String() string { + return m.toString(true) +} + +// KeysString returns a string representation of the map's key set. +// Order is unspecified. +// +func (m *Map) KeysString() string { + return m.toString(false) +} + +//////////////////////////////////////////////////////////////////////// +// Hasher + +// A Hasher maps each type to its hash value. +// For efficiency, a hasher uses memoization; thus its memory +// footprint grows monotonically over time. +// Hashers are not thread-safe. +// Hashers have reference semantics. +// Call MakeHasher to create a Hasher. +type Hasher struct { + memo map[types.Type]uint32 +} + +// MakeHasher returns a new Hasher instance. +func MakeHasher() Hasher { + return Hasher{make(map[types.Type]uint32)} +} + +// Hash computes a hash value for the given type t such that +// Identical(t, t') => Hash(t) == Hash(t'). +func (h Hasher) Hash(t types.Type) uint32 { + hash, ok := h.memo[t] + if !ok { + hash = h.hashFor(t) + h.memo[t] = hash + } + return hash +} + +// hashString computes the Fowler–Noll–Vo hash of s. +func hashString(s string) uint32 { + var h uint32 + for i := 0; i < len(s); i++ { + h ^= uint32(s[i]) + h *= 16777619 + } + return h +} + +// hashFor computes the hash of t. +func (h Hasher) hashFor(t types.Type) uint32 { + // See Identical for rationale. + switch t := t.(type) { + case *types.Basic: + return uint32(t.Kind()) + + case *types.Array: + return 9043 + 2*uint32(t.Len()) + 3*h.Hash(t.Elem()) + + case *types.Slice: + return 9049 + 2*h.Hash(t.Elem()) + + case *types.Struct: + var hash uint32 = 9059 + for i, n := 0, t.NumFields(); i < n; i++ { + f := t.Field(i) + if f.Anonymous() { + hash += 8861 + } + hash += hashString(t.Tag(i)) + hash += hashString(f.Name()) // (ignore f.Pkg) + hash += h.Hash(f.Type()) + } + return hash + + case *types.Pointer: + return 9067 + 2*h.Hash(t.Elem()) + + case *types.Signature: + var hash uint32 = 9091 + if t.Variadic() { + hash *= 8863 + } + return hash + 3*h.hashTuple(t.Params()) + 5*h.hashTuple(t.Results()) + + case *types.Interface: + var hash uint32 = 9103 + for i, n := 0, t.NumMethods(); i < n; i++ { + // See go/types.identicalMethods for rationale. + // Method order is not significant. + // Ignore m.Pkg(). + m := t.Method(i) + hash += 3*hashString(m.Name()) + 5*h.Hash(m.Type()) + } + return hash + + case *types.Map: + return 9109 + 2*h.Hash(t.Key()) + 3*h.Hash(t.Elem()) + + case *types.Chan: + return 9127 + 2*uint32(t.Dir()) + 3*h.Hash(t.Elem()) + + case *types.Named: + // Not safe with a copying GC; objects may move. + return uint32(reflect.ValueOf(t.Obj()).Pointer()) + + case *types.Tuple: + return h.hashTuple(t) + } + panic(t) +} + +func (h Hasher) hashTuple(tuple *types.Tuple) uint32 { + // See go/types.identicalTypes for rationale. + n := tuple.Len() + var hash uint32 = 9137 + 2*uint32(n) + for i := 0; i < n; i++ { + hash += 3 * h.Hash(tuple.At(i).Type()) + } + return hash +} diff --git a/vendor/golang.org/x/tools/go/types/typeutil/methodsetcache.go b/vendor/golang.org/x/tools/go/types/typeutil/methodsetcache.go new file mode 100644 index 0000000..daad644 --- /dev/null +++ b/vendor/golang.org/x/tools/go/types/typeutil/methodsetcache.go @@ -0,0 +1,73 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// This file implements a cache of method sets. + +package typeutil + +import ( + "sync" + + "golang.org/x/tools/go/types" +) + +// A MethodSetCache records the method set of each type T for which +// MethodSet(T) is called so that repeat queries are fast. +// The zero value is a ready-to-use cache instance. +type MethodSetCache struct { + mu sync.Mutex + named map[*types.Named]struct{ value, pointer *types.MethodSet } // method sets for named N and *N + others map[types.Type]*types.MethodSet // all other types +} + +// MethodSet returns the method set of type T. It is thread-safe. +// +// If cache is nil, this function is equivalent to types.NewMethodSet(T). +// Utility functions can thus expose an optional *MethodSetCache +// parameter to clients that care about performance. +// +func (cache *MethodSetCache) MethodSet(T types.Type) *types.MethodSet { + if cache == nil { + return types.NewMethodSet(T) + } + cache.mu.Lock() + defer cache.mu.Unlock() + + switch T := T.(type) { + case *types.Named: + return cache.lookupNamed(T).value + + case *types.Pointer: + if N, ok := T.Elem().(*types.Named); ok { + return cache.lookupNamed(N).pointer + } + } + + // all other types + // (The map uses pointer equivalence, not type identity.) + mset := cache.others[T] + if mset == nil { + mset = types.NewMethodSet(T) + if cache.others == nil { + cache.others = make(map[types.Type]*types.MethodSet) + } + cache.others[T] = mset + } + return mset +} + +func (cache *MethodSetCache) lookupNamed(named *types.Named) struct{ value, pointer *types.MethodSet } { + if cache.named == nil { + cache.named = make(map[*types.Named]struct{ value, pointer *types.MethodSet }) + } + // Avoid recomputing mset(*T) for each distinct Pointer + // instance whose underlying type is a named type. + msets, ok := cache.named[named] + if !ok { + msets.value = types.NewMethodSet(named) + msets.pointer = types.NewMethodSet(types.NewPointer(named)) + cache.named[named] = msets + } + return msets +} diff --git a/vendor/golang.org/x/tools/go/types/typeutil/ui.go b/vendor/golang.org/x/tools/go/types/typeutil/ui.go new file mode 100644 index 0000000..20c5249 --- /dev/null +++ b/vendor/golang.org/x/tools/go/types/typeutil/ui.go @@ -0,0 +1,38 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package typeutil + +// This file defines utilities for user interfaces that display types. + +import "golang.org/x/tools/go/types" + +// IntuitiveMethodSet returns the intuitive method set of a type, T. +// +// The result contains MethodSet(T) and additionally, if T is a +// concrete type, methods belonging to *T if there is no identically +// named method on T itself. This corresponds to user intuition about +// method sets; this function is intended only for user interfaces. +// +// The order of the result is as for types.MethodSet(T). +// +func IntuitiveMethodSet(T types.Type, msets *MethodSetCache) []*types.Selection { + var result []*types.Selection + mset := msets.MethodSet(T) + if _, ok := T.Underlying().(*types.Interface); ok { + for i, n := 0, mset.Len(); i < n; i++ { + result = append(result, mset.At(i)) + } + } else { + pmset := msets.MethodSet(types.NewPointer(T)) + for i, n := 0, pmset.Len(); i < n; i++ { + meth := pmset.At(i) + if m := mset.Lookup(meth.Obj().Pkg(), meth.Obj().Name()); m != nil { + meth = m + } + result = append(result, meth) + } + } + return result +} diff --git a/vendor/golang.org/x/tools/go/types/typexpr.go b/vendor/golang.org/x/tools/go/types/typexpr.go new file mode 100644 index 0000000..bd2d7ba --- /dev/null +++ b/vendor/golang.org/x/tools/go/types/typexpr.go @@ -0,0 +1,713 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// This file implements type-checking of identifiers and type expressions. + +package types + +import ( + "go/ast" + "go/token" + "sort" + "strconv" + + "golang.org/x/tools/go/exact" +) + +// ident type-checks identifier e and initializes x with the value or type of e. +// If an error occurred, x.mode is set to invalid. +// For the meaning of def and path, see check.typ, below. +// +func (check *Checker) ident(x *operand, e *ast.Ident, def *Named, path []*TypeName) { + x.mode = invalid + x.expr = e + + scope, obj := check.scope.LookupParent(e.Name, check.pos) + if obj == nil { + if e.Name == "_" { + check.errorf(e.Pos(), "cannot use _ as value or type") + } else { + check.errorf(e.Pos(), "undeclared name: %s", e.Name) + } + return + } + check.recordUse(e, obj) + + check.objDecl(obj, def, path) + typ := obj.Type() + assert(typ != nil) + + // The object may be dot-imported: If so, remove its package from + // the map of unused dot imports for the respective file scope. + // (This code is only needed for dot-imports. Without them, + // we only have to mark variables, see *Var case below). + if pkg := obj.Pkg(); pkg != check.pkg && pkg != nil { + delete(check.unusedDotImports[scope], pkg) + } + + switch obj := obj.(type) { + case *PkgName: + check.errorf(e.Pos(), "use of package %s not in selector", obj.name) + return + + case *Const: + check.addDeclDep(obj) + if typ == Typ[Invalid] { + return + } + if obj == universeIota { + if check.iota == nil { + check.errorf(e.Pos(), "cannot use iota outside constant declaration") + return + } + x.val = check.iota + } else { + x.val = obj.val + } + assert(x.val != nil) + x.mode = constant + + case *TypeName: + x.mode = typexpr + // check for cycle + // (it's ok to iterate forward because each named type appears at most once in path) + for i, prev := range path { + if prev == obj { + check.errorf(obj.pos, "illegal cycle in declaration of %s", obj.name) + // print cycle + for _, obj := range path[i:] { + check.errorf(obj.Pos(), "\t%s refers to", obj.Name()) // secondary error, \t indented + } + check.errorf(obj.Pos(), "\t%s", obj.Name()) + // maintain x.mode == typexpr despite error + typ = Typ[Invalid] + break + } + } + + case *Var: + if obj.pkg == check.pkg { + obj.used = true + } + check.addDeclDep(obj) + if typ == Typ[Invalid] { + return + } + x.mode = variable + + case *Func: + check.addDeclDep(obj) + x.mode = value + + case *Builtin: + x.id = obj.id + x.mode = builtin + + case *Nil: + x.mode = value + + default: + unreachable() + } + + x.typ = typ +} + +// typExpr type-checks the type expression e and returns its type, or Typ[Invalid]. +// If def != nil, e is the type specification for the named type def, declared +// in a type declaration, and def.underlying will be set to the type of e before +// any components of e are type-checked. Path contains the path of named types +// referring to this type. +// +func (check *Checker) typExpr(e ast.Expr, def *Named, path []*TypeName) (T Type) { + if trace { + check.trace(e.Pos(), "%s", e) + check.indent++ + defer func() { + check.indent-- + check.trace(e.Pos(), "=> %s", T) + }() + } + + T = check.typExprInternal(e, def, path) + assert(isTyped(T)) + check.recordTypeAndValue(e, typexpr, T, nil) + + return +} + +func (check *Checker) typ(e ast.Expr) Type { + return check.typExpr(e, nil, nil) +} + +// funcType type-checks a function or method type. +func (check *Checker) funcType(sig *Signature, recvPar *ast.FieldList, ftyp *ast.FuncType) { + scope := NewScope(check.scope, token.NoPos, token.NoPos, "function") + check.recordScope(ftyp, scope) + + recvList, _ := check.collectParams(scope, recvPar, false) + params, variadic := check.collectParams(scope, ftyp.Params, true) + results, _ := check.collectParams(scope, ftyp.Results, false) + + if recvPar != nil { + // recv parameter list present (may be empty) + // spec: "The receiver is specified via an extra parameter section preceeding the + // method name. That parameter section must declare a single parameter, the receiver." + var recv *Var + switch len(recvList) { + case 0: + check.error(recvPar.Pos(), "method is missing receiver") + recv = NewParam(0, nil, "", Typ[Invalid]) // ignore recv below + default: + // more than one receiver + check.error(recvList[len(recvList)-1].Pos(), "method must have exactly one receiver") + fallthrough // continue with first receiver + case 1: + recv = recvList[0] + } + // spec: "The receiver type must be of the form T or *T where T is a type name." + // (ignore invalid types - error was reported before) + if t, _ := deref(recv.typ); t != Typ[Invalid] { + var err string + if T, _ := t.(*Named); T != nil { + // spec: "The type denoted by T is called the receiver base type; it must not + // be a pointer or interface type and it must be declared in the same package + // as the method." + if T.obj.pkg != check.pkg { + err = "type not defined in this package" + } else { + // TODO(gri) This is not correct if the underlying type is unknown yet. + switch u := T.underlying.(type) { + case *Basic: + // unsafe.Pointer is treated like a regular pointer + if u.kind == UnsafePointer { + err = "unsafe.Pointer" + } + case *Pointer, *Interface: + err = "pointer or interface type" + } + } + } else { + err = "basic or unnamed type" + } + if err != "" { + check.errorf(recv.pos, "invalid receiver %s (%s)", recv.typ, err) + // ok to continue + } + } + sig.recv = recv + } + + sig.scope = scope + sig.params = NewTuple(params...) + sig.results = NewTuple(results...) + sig.variadic = variadic +} + +// typExprInternal drives type checking of types. +// Must only be called by typExpr. +// +func (check *Checker) typExprInternal(e ast.Expr, def *Named, path []*TypeName) Type { + switch e := e.(type) { + case *ast.BadExpr: + // ignore - error reported before + + case *ast.Ident: + var x operand + check.ident(&x, e, def, path) + + switch x.mode { + case typexpr: + typ := x.typ + def.setUnderlying(typ) + return typ + case invalid: + // ignore - error reported before + case novalue: + check.errorf(x.pos(), "%s used as type", &x) + default: + check.errorf(x.pos(), "%s is not a type", &x) + } + + case *ast.SelectorExpr: + var x operand + check.selector(&x, e) + + switch x.mode { + case typexpr: + typ := x.typ + def.setUnderlying(typ) + return typ + case invalid: + // ignore - error reported before + case novalue: + check.errorf(x.pos(), "%s used as type", &x) + default: + check.errorf(x.pos(), "%s is not a type", &x) + } + + case *ast.ParenExpr: + return check.typExpr(e.X, def, path) + + case *ast.ArrayType: + if e.Len != nil { + typ := new(Array) + def.setUnderlying(typ) + typ.len = check.arrayLength(e.Len) + typ.elem = check.typExpr(e.Elt, nil, path) + return typ + + } else { + typ := new(Slice) + def.setUnderlying(typ) + typ.elem = check.typ(e.Elt) + return typ + } + + case *ast.StructType: + typ := new(Struct) + def.setUnderlying(typ) + check.structType(typ, e, path) + return typ + + case *ast.StarExpr: + typ := new(Pointer) + def.setUnderlying(typ) + typ.base = check.typ(e.X) + return typ + + case *ast.FuncType: + typ := new(Signature) + def.setUnderlying(typ) + check.funcType(typ, nil, e) + return typ + + case *ast.InterfaceType: + typ := new(Interface) + def.setUnderlying(typ) + check.interfaceType(typ, e, def, path) + return typ + + case *ast.MapType: + typ := new(Map) + def.setUnderlying(typ) + + typ.key = check.typ(e.Key) + typ.elem = check.typ(e.Value) + + // spec: "The comparison operators == and != must be fully defined + // for operands of the key type; thus the key type must not be a + // function, map, or slice." + // + // Delay this check because it requires fully setup types; + // it is safe to continue in any case (was issue 6667). + check.delay(func() { + if !Comparable(typ.key) { + check.errorf(e.Key.Pos(), "invalid map key type %s", typ.key) + } + }) + + return typ + + case *ast.ChanType: + typ := new(Chan) + def.setUnderlying(typ) + + dir := SendRecv + switch e.Dir { + case ast.SEND | ast.RECV: + // nothing to do + case ast.SEND: + dir = SendOnly + case ast.RECV: + dir = RecvOnly + default: + check.invalidAST(e.Pos(), "unknown channel direction %d", e.Dir) + // ok to continue + } + + typ.dir = dir + typ.elem = check.typ(e.Value) + return typ + + default: + check.errorf(e.Pos(), "%s is not a type", e) + } + + typ := Typ[Invalid] + def.setUnderlying(typ) + return typ +} + +// typeOrNil type-checks the type expression (or nil value) e +// and returns the typ of e, or nil. +// If e is neither a type nor nil, typOrNil returns Typ[Invalid]. +// +func (check *Checker) typOrNil(e ast.Expr) Type { + var x operand + check.rawExpr(&x, e, nil) + switch x.mode { + case invalid: + // ignore - error reported before + case novalue: + check.errorf(x.pos(), "%s used as type", &x) + case typexpr: + return x.typ + case value: + if x.isNil() { + return nil + } + fallthrough + default: + check.errorf(x.pos(), "%s is not a type", &x) + } + return Typ[Invalid] +} + +func (check *Checker) arrayLength(e ast.Expr) int64 { + var x operand + check.expr(&x, e) + if x.mode != constant { + if x.mode != invalid { + check.errorf(x.pos(), "array length %s must be constant", &x) + } + return 0 + } + if !x.isInteger() { + check.errorf(x.pos(), "array length %s must be integer", &x) + return 0 + } + n, ok := exact.Int64Val(x.val) + if !ok || n < 0 { + check.errorf(x.pos(), "invalid array length %s", &x) + return 0 + } + return n +} + +func (check *Checker) collectParams(scope *Scope, list *ast.FieldList, variadicOk bool) (params []*Var, variadic bool) { + if list == nil { + return + } + + var named, anonymous bool + for i, field := range list.List { + ftype := field.Type + if t, _ := ftype.(*ast.Ellipsis); t != nil { + ftype = t.Elt + if variadicOk && i == len(list.List)-1 { + variadic = true + } else { + check.invalidAST(field.Pos(), "... not permitted") + // ignore ... and continue + } + } + typ := check.typ(ftype) + // The parser ensures that f.Tag is nil and we don't + // care if a constructed AST contains a non-nil tag. + if len(field.Names) > 0 { + // named parameter + for _, name := range field.Names { + if name.Name == "" { + check.invalidAST(name.Pos(), "anonymous parameter") + // ok to continue + } + par := NewParam(name.Pos(), check.pkg, name.Name, typ) + check.declare(scope, name, par, scope.pos) + params = append(params, par) + } + named = true + } else { + // anonymous parameter + par := NewParam(ftype.Pos(), check.pkg, "", typ) + check.recordImplicit(field, par) + params = append(params, par) + anonymous = true + } + } + + if named && anonymous { + check.invalidAST(list.Pos(), "list contains both named and anonymous parameters") + // ok to continue + } + + // For a variadic function, change the last parameter's type from T to []T. + if variadic && len(params) > 0 { + last := params[len(params)-1] + last.typ = &Slice{elem: last.typ} + } + + return +} + +func (check *Checker) declareInSet(oset *objset, pos token.Pos, obj Object) bool { + if alt := oset.insert(obj); alt != nil { + check.errorf(pos, "%s redeclared", obj.Name()) + check.reportAltDecl(alt) + return false + } + return true +} + +func (check *Checker) interfaceType(iface *Interface, ityp *ast.InterfaceType, def *Named, path []*TypeName) { + // empty interface: common case + if ityp.Methods == nil { + return + } + + // The parser ensures that field tags are nil and we don't + // care if a constructed AST contains non-nil tags. + + // use named receiver type if available (for better error messages) + var recvTyp Type = iface + if def != nil { + recvTyp = def + } + + // Phase 1: Collect explicitly declared methods, the corresponding + // signature (AST) expressions, and the list of embedded + // type (AST) expressions. Do not resolve signatures or + // embedded types yet to avoid cycles referring to this + // interface. + + var ( + mset objset + signatures []ast.Expr // list of corresponding method signatures + embedded []ast.Expr // list of embedded types + ) + for _, f := range ityp.Methods.List { + if len(f.Names) > 0 { + // The parser ensures that there's only one method + // and we don't care if a constructed AST has more. + name := f.Names[0] + pos := name.Pos() + // spec: "As with all method sets, in an interface type, + // each method must have a unique non-blank name." + if name.Name == "_" { + check.errorf(pos, "invalid method name _") + continue + } + // Don't type-check signature yet - use an + // empty signature now and update it later. + // Since we know the receiver, set it up now + // (required to avoid crash in ptrRecv; see + // e.g. test case for issue 6638). + // TODO(gri) Consider marking methods signatures + // as incomplete, for better error messages. See + // also the T4 and T5 tests in testdata/cycles2.src. + sig := new(Signature) + sig.recv = NewVar(pos, check.pkg, "", recvTyp) + m := NewFunc(pos, check.pkg, name.Name, sig) + if check.declareInSet(&mset, pos, m) { + iface.methods = append(iface.methods, m) + iface.allMethods = append(iface.allMethods, m) + signatures = append(signatures, f.Type) + check.recordDef(name, m) + } + } else { + // embedded type + embedded = append(embedded, f.Type) + } + } + + // Phase 2: Resolve embedded interfaces. Because an interface must not + // embed itself (directly or indirectly), each embedded interface + // can be fully resolved without depending on any method of this + // interface (if there is a cycle or another error, the embedded + // type resolves to an invalid type and is ignored). + // In particular, the list of methods for each embedded interface + // must be complete (it cannot depend on this interface), and so + // those methods can be added to the list of all methods of this + // interface. + + for _, e := range embedded { + pos := e.Pos() + typ := check.typExpr(e, nil, path) + // Determine underlying embedded (possibly incomplete) type + // by following its forward chain. + named, _ := typ.(*Named) + under := underlying(named) + embed, _ := under.(*Interface) + if embed == nil { + if typ != Typ[Invalid] { + check.errorf(pos, "%s is not an interface", typ) + } + continue + } + iface.embeddeds = append(iface.embeddeds, named) + // collect embedded methods + for _, m := range embed.allMethods { + if check.declareInSet(&mset, pos, m) { + iface.allMethods = append(iface.allMethods, m) + } + } + } + + // Phase 3: At this point all methods have been collected for this interface. + // It is now safe to type-check the signatures of all explicitly + // declared methods, even if they refer to this interface via a cycle + // and embed the methods of this interface in a parameter of interface + // type. + + for i, m := range iface.methods { + expr := signatures[i] + typ := check.typ(expr) + sig, _ := typ.(*Signature) + if sig == nil { + if typ != Typ[Invalid] { + check.invalidAST(expr.Pos(), "%s is not a method signature", typ) + } + continue // keep method with empty method signature + } + // update signature, but keep recv that was set up before + old := m.typ.(*Signature) + sig.recv = old.recv + *old = *sig // update signature (don't replace it!) + } + + // TODO(gri) The list of explicit methods is only sorted for now to + // produce the same Interface as NewInterface. We may be able to + // claim source order in the future. Revisit. + sort.Sort(byUniqueMethodName(iface.methods)) + + // TODO(gri) The list of embedded types is only sorted for now to + // produce the same Interface as NewInterface. We may be able to + // claim source order in the future. Revisit. + sort.Sort(byUniqueTypeName(iface.embeddeds)) + + sort.Sort(byUniqueMethodName(iface.allMethods)) +} + +// byUniqueTypeName named type lists can be sorted by their unique type names. +type byUniqueTypeName []*Named + +func (a byUniqueTypeName) Len() int { return len(a) } +func (a byUniqueTypeName) Less(i, j int) bool { return a[i].obj.Id() < a[j].obj.Id() } +func (a byUniqueTypeName) Swap(i, j int) { a[i], a[j] = a[j], a[i] } + +// byUniqueMethodName method lists can be sorted by their unique method names. +type byUniqueMethodName []*Func + +func (a byUniqueMethodName) Len() int { return len(a) } +func (a byUniqueMethodName) Less(i, j int) bool { return a[i].Id() < a[j].Id() } +func (a byUniqueMethodName) Swap(i, j int) { a[i], a[j] = a[j], a[i] } + +func (check *Checker) tag(t *ast.BasicLit) string { + if t != nil { + if t.Kind == token.STRING { + if val, err := strconv.Unquote(t.Value); err == nil { + return val + } + } + check.invalidAST(t.Pos(), "incorrect tag syntax: %q", t.Value) + } + return "" +} + +func (check *Checker) structType(styp *Struct, e *ast.StructType, path []*TypeName) { + list := e.Fields + if list == nil { + return + } + + // struct fields and tags + var fields []*Var + var tags []string + + // for double-declaration checks + var fset objset + + // current field typ and tag + var typ Type + var tag string + // anonymous != nil indicates an anonymous field. + add := func(field *ast.Field, ident *ast.Ident, anonymous *TypeName, pos token.Pos) { + if tag != "" && tags == nil { + tags = make([]string, len(fields)) + } + if tags != nil { + tags = append(tags, tag) + } + + name := ident.Name + fld := NewField(pos, check.pkg, name, typ, anonymous != nil) + // spec: "Within a struct, non-blank field names must be unique." + if name == "_" || check.declareInSet(&fset, pos, fld) { + fields = append(fields, fld) + check.recordDef(ident, fld) + } + if anonymous != nil { + check.recordUse(ident, anonymous) + } + } + + for _, f := range list.List { + typ = check.typExpr(f.Type, nil, path) + tag = check.tag(f.Tag) + if len(f.Names) > 0 { + // named fields + for _, name := range f.Names { + add(f, name, nil, name.Pos()) + } + } else { + // anonymous field + name := anonymousFieldIdent(f.Type) + pos := f.Type.Pos() + t, isPtr := deref(typ) + switch t := t.(type) { + case *Basic: + if t == Typ[Invalid] { + // error was reported before + continue + } + // unsafe.Pointer is treated like a regular pointer + if t.kind == UnsafePointer { + check.errorf(pos, "anonymous field type cannot be unsafe.Pointer") + continue + } + add(f, name, Universe.Lookup(t.name).(*TypeName), pos) + + case *Named: + // spec: "An embedded type must be specified as a type name + // T or as a pointer to a non-interface type name *T, and T + // itself may not be a pointer type." + switch u := t.underlying.(type) { + case *Basic: + // unsafe.Pointer is treated like a regular pointer + if u.kind == UnsafePointer { + check.errorf(pos, "anonymous field type cannot be unsafe.Pointer") + continue + } + case *Pointer: + check.errorf(pos, "anonymous field type cannot be a pointer") + continue + case *Interface: + if isPtr { + check.errorf(pos, "anonymous field type cannot be a pointer to an interface") + continue + } + } + add(f, name, t.obj, pos) + + default: + check.invalidAST(pos, "anonymous field type %s must be named", typ) + } + } + } + + styp.fields = fields + styp.tags = tags +} + +func anonymousFieldIdent(e ast.Expr) *ast.Ident { + switch e := e.(type) { + case *ast.Ident: + return e + case *ast.StarExpr: + return anonymousFieldIdent(e.X) + case *ast.SelectorExpr: + return e.Sel + } + return nil // invalid anonymous field +} diff --git a/vendor/golang.org/x/tools/go/types/universe.go b/vendor/golang.org/x/tools/go/types/universe.go new file mode 100644 index 0000000..12a34ef --- /dev/null +++ b/vendor/golang.org/x/tools/go/types/universe.go @@ -0,0 +1,224 @@ +// Copyright 2011 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// This file sets up the universe scope and the unsafe package. + +package types + +import ( + "go/token" + "strings" + + "golang.org/x/tools/go/exact" +) + +var ( + Universe *Scope + Unsafe *Package + universeIota *Const + universeByte *Basic // uint8 alias, but has name "byte" + universeRune *Basic // int32 alias, but has name "rune" +) + +var Typ = []*Basic{ + Invalid: {Invalid, 0, "invalid type"}, + + Bool: {Bool, IsBoolean, "bool"}, + Int: {Int, IsInteger, "int"}, + Int8: {Int8, IsInteger, "int8"}, + Int16: {Int16, IsInteger, "int16"}, + Int32: {Int32, IsInteger, "int32"}, + Int64: {Int64, IsInteger, "int64"}, + Uint: {Uint, IsInteger | IsUnsigned, "uint"}, + Uint8: {Uint8, IsInteger | IsUnsigned, "uint8"}, + Uint16: {Uint16, IsInteger | IsUnsigned, "uint16"}, + Uint32: {Uint32, IsInteger | IsUnsigned, "uint32"}, + Uint64: {Uint64, IsInteger | IsUnsigned, "uint64"}, + Uintptr: {Uintptr, IsInteger | IsUnsigned, "uintptr"}, + Float32: {Float32, IsFloat, "float32"}, + Float64: {Float64, IsFloat, "float64"}, + Complex64: {Complex64, IsComplex, "complex64"}, + Complex128: {Complex128, IsComplex, "complex128"}, + String: {String, IsString, "string"}, + UnsafePointer: {UnsafePointer, 0, "Pointer"}, + + UntypedBool: {UntypedBool, IsBoolean | IsUntyped, "untyped bool"}, + UntypedInt: {UntypedInt, IsInteger | IsUntyped, "untyped int"}, + UntypedRune: {UntypedRune, IsInteger | IsUntyped, "untyped rune"}, + UntypedFloat: {UntypedFloat, IsFloat | IsUntyped, "untyped float"}, + UntypedComplex: {UntypedComplex, IsComplex | IsUntyped, "untyped complex"}, + UntypedString: {UntypedString, IsString | IsUntyped, "untyped string"}, + UntypedNil: {UntypedNil, IsUntyped, "untyped nil"}, +} + +var aliases = [...]*Basic{ + {Byte, IsInteger | IsUnsigned, "byte"}, + {Rune, IsInteger, "rune"}, +} + +func defPredeclaredTypes() { + for _, t := range Typ { + def(NewTypeName(token.NoPos, nil, t.name, t)) + } + for _, t := range aliases { + def(NewTypeName(token.NoPos, nil, t.name, t)) + } + + // Error has a nil package in its qualified name since it is in no package + res := NewVar(token.NoPos, nil, "", Typ[String]) + sig := &Signature{results: NewTuple(res)} + err := NewFunc(token.NoPos, nil, "Error", sig) + typ := &Named{underlying: NewInterface([]*Func{err}, nil).Complete()} + sig.recv = NewVar(token.NoPos, nil, "", typ) + def(NewTypeName(token.NoPos, nil, "error", typ)) +} + +var predeclaredConsts = [...]struct { + name string + kind BasicKind + val exact.Value +}{ + {"true", UntypedBool, exact.MakeBool(true)}, + {"false", UntypedBool, exact.MakeBool(false)}, + {"iota", UntypedInt, exact.MakeInt64(0)}, +} + +func defPredeclaredConsts() { + for _, c := range predeclaredConsts { + def(NewConst(token.NoPos, nil, c.name, Typ[c.kind], c.val)) + } +} + +func defPredeclaredNil() { + def(&Nil{object{name: "nil", typ: Typ[UntypedNil]}}) +} + +// A builtinId is the id of a builtin function. +type builtinId int + +const ( + // universe scope + _Append builtinId = iota + _Cap + _Close + _Complex + _Copy + _Delete + _Imag + _Len + _Make + _New + _Panic + _Print + _Println + _Real + _Recover + + // package unsafe + _Alignof + _Offsetof + _Sizeof + + // testing support + _Assert + _Trace +) + +var predeclaredFuncs = [...]struct { + name string + nargs int + variadic bool + kind exprKind +}{ + _Append: {"append", 1, true, expression}, + _Cap: {"cap", 1, false, expression}, + _Close: {"close", 1, false, statement}, + _Complex: {"complex", 2, false, expression}, + _Copy: {"copy", 2, false, statement}, + _Delete: {"delete", 2, false, statement}, + _Imag: {"imag", 1, false, expression}, + _Len: {"len", 1, false, expression}, + _Make: {"make", 1, true, expression}, + _New: {"new", 1, false, expression}, + _Panic: {"panic", 1, false, statement}, + _Print: {"print", 0, true, statement}, + _Println: {"println", 0, true, statement}, + _Real: {"real", 1, false, expression}, + _Recover: {"recover", 0, false, statement}, + + _Alignof: {"Alignof", 1, false, expression}, + _Offsetof: {"Offsetof", 1, false, expression}, + _Sizeof: {"Sizeof", 1, false, expression}, + + _Assert: {"assert", 1, false, statement}, + _Trace: {"trace", 0, true, statement}, +} + +func defPredeclaredFuncs() { + for i := range predeclaredFuncs { + id := builtinId(i) + if id == _Assert || id == _Trace { + continue // only define these in testing environment + } + def(newBuiltin(id)) + } +} + +// DefPredeclaredTestFuncs defines the assert and trace built-ins. +// These built-ins are intended for debugging and testing of this +// package only. +func DefPredeclaredTestFuncs() { + if Universe.Lookup("assert") != nil { + return // already defined + } + def(newBuiltin(_Assert)) + def(newBuiltin(_Trace)) +} + +func init() { + Universe = NewScope(nil, token.NoPos, token.NoPos, "universe") + Unsafe = NewPackage("unsafe", "unsafe") + Unsafe.complete = true + + defPredeclaredTypes() + defPredeclaredConsts() + defPredeclaredNil() + defPredeclaredFuncs() + + universeIota = Universe.Lookup("iota").(*Const) + universeByte = Universe.Lookup("byte").(*TypeName).typ.(*Basic) + universeRune = Universe.Lookup("rune").(*TypeName).typ.(*Basic) +} + +// Objects with names containing blanks are internal and not entered into +// a scope. Objects with exported names are inserted in the unsafe package +// scope; other objects are inserted in the universe scope. +// +func def(obj Object) { + name := obj.Name() + if strings.Index(name, " ") >= 0 { + return // nothing to do + } + // fix Obj link for named types + if typ, ok := obj.Type().(*Named); ok { + typ.obj = obj.(*TypeName) + } + // exported identifiers go into package unsafe + scope := Universe + if obj.Exported() { + scope = Unsafe.scope + // set Pkg field + switch obj := obj.(type) { + case *TypeName: + obj.pkg = Unsafe + case *Builtin: + obj.pkg = Unsafe + default: + unreachable() + } + } + if scope.Insert(obj) != nil { + panic("internal error: double declaration") + } +} diff --git a/vendor/golang.org/x/tools/imports/fix.go b/vendor/golang.org/x/tools/imports/fix.go new file mode 100644 index 0000000..22fde6c --- /dev/null +++ b/vendor/golang.org/x/tools/imports/fix.go @@ -0,0 +1,387 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package imports + +import ( + "fmt" + "go/ast" + "go/build" + "go/parser" + "go/token" + "os" + "path" + "path/filepath" + "strings" + "sync" + + "golang.org/x/tools/go/ast/astutil" +) + +// importToGroup is a list of functions which map from an import path to +// a group number. +var importToGroup = []func(importPath string) (num int, ok bool){ + func(importPath string) (num int, ok bool) { + if strings.HasPrefix(importPath, "appengine") { + return 2, true + } + return + }, + func(importPath string) (num int, ok bool) { + if strings.Contains(importPath, ".") { + return 1, true + } + return + }, +} + +func importGroup(importPath string) int { + for _, fn := range importToGroup { + if n, ok := fn(importPath); ok { + return n + } + } + return 0 +} + +func fixImports(fset *token.FileSet, f *ast.File) (added []string, err error) { + // refs are a set of possible package references currently unsatisfied by imports. + // first key: either base package (e.g. "fmt") or renamed package + // second key: referenced package symbol (e.g. "Println") + refs := make(map[string]map[string]bool) + + // decls are the current package imports. key is base package or renamed package. + decls := make(map[string]*ast.ImportSpec) + + // collect potential uses of packages. + var visitor visitFn + visitor = visitFn(func(node ast.Node) ast.Visitor { + if node == nil { + return visitor + } + switch v := node.(type) { + case *ast.ImportSpec: + if v.Name != nil { + decls[v.Name.Name] = v + } else { + local := importPathToName(strings.Trim(v.Path.Value, `\"`)) + decls[local] = v + } + case *ast.SelectorExpr: + xident, ok := v.X.(*ast.Ident) + if !ok { + break + } + if xident.Obj != nil { + // if the parser can resolve it, it's not a package ref + break + } + pkgName := xident.Name + if refs[pkgName] == nil { + refs[pkgName] = make(map[string]bool) + } + if decls[pkgName] == nil { + refs[pkgName][v.Sel.Name] = true + } + } + return visitor + }) + ast.Walk(visitor, f) + + // Search for imports matching potential package references. + searches := 0 + type result struct { + ipath string + name string + err error + } + results := make(chan result) + for pkgName, symbols := range refs { + if len(symbols) == 0 { + continue // skip over packages already imported + } + go func(pkgName string, symbols map[string]bool) { + ipath, rename, err := findImport(pkgName, symbols) + r := result{ipath: ipath, err: err} + if rename { + r.name = pkgName + } + results <- r + }(pkgName, symbols) + searches++ + } + for i := 0; i < searches; i++ { + result := <-results + if result.err != nil { + return nil, result.err + } + if result.ipath != "" { + if result.name != "" { + astutil.AddNamedImport(fset, f, result.name, result.ipath) + } else { + astutil.AddImport(fset, f, result.ipath) + } + added = append(added, result.ipath) + } + } + + // Nil out any unused ImportSpecs, to be removed in following passes + unusedImport := map[string]bool{} + for pkg, is := range decls { + if refs[pkg] == nil && pkg != "_" && pkg != "." { + unusedImport[strings.Trim(is.Path.Value, `"`)] = true + } + } + for ipath := range unusedImport { + if ipath == "C" { + // Don't remove cgo stuff. + continue + } + astutil.DeleteImport(fset, f, ipath) + } + + return added, nil +} + +// importPathToName returns the package name for the given import path. +var importPathToName = importPathToNameGoPath + +// importPathToNameBasic assumes the package name is the base of import path. +func importPathToNameBasic(importPath string) (packageName string) { + return path.Base(importPath) +} + +// importPathToNameGoPath finds out the actual package name, as declared in its .go files. +// If there's a problem, it falls back to using importPathToNameBasic. +func importPathToNameGoPath(importPath string) (packageName string) { + if buildPkg, err := build.Import(importPath, "", 0); err == nil { + return buildPkg.Name + } else { + return importPathToNameBasic(importPath) + } +} + +type pkg struct { + importpath string // full pkg import path, e.g. "net/http" + dir string // absolute file path to pkg directory e.g. "/usr/lib/go/src/fmt" +} + +var pkgIndexOnce sync.Once + +var pkgIndex struct { + sync.Mutex + m map[string][]pkg // shortname => []pkg, e.g "http" => "net/http" +} + +// gate is a semaphore for limiting concurrency. +type gate chan struct{} + +func (g gate) enter() { g <- struct{}{} } +func (g gate) leave() { <-g } + +// fsgate protects the OS & filesystem from too much concurrency. +// Too much disk I/O -> too many threads -> swapping and bad scheduling. +var fsgate = make(gate, 8) + +func loadPkgIndex() { + pkgIndex.Lock() + pkgIndex.m = make(map[string][]pkg) + pkgIndex.Unlock() + + var wg sync.WaitGroup + for _, path := range build.Default.SrcDirs() { + fsgate.enter() + f, err := os.Open(path) + if err != nil { + fsgate.leave() + fmt.Fprint(os.Stderr, err) + continue + } + children, err := f.Readdir(-1) + f.Close() + fsgate.leave() + if err != nil { + fmt.Fprint(os.Stderr, err) + continue + } + for _, child := range children { + if child.IsDir() { + wg.Add(1) + go func(path, name string) { + defer wg.Done() + loadPkg(&wg, path, name) + }(path, child.Name()) + } + } + } + wg.Wait() +} + +func loadPkg(wg *sync.WaitGroup, root, pkgrelpath string) { + importpath := filepath.ToSlash(pkgrelpath) + dir := filepath.Join(root, importpath) + + fsgate.enter() + defer fsgate.leave() + pkgDir, err := os.Open(dir) + if err != nil { + return + } + children, err := pkgDir.Readdir(-1) + pkgDir.Close() + if err != nil { + return + } + // hasGo tracks whether a directory actually appears to be a + // Go source code directory. If $GOPATH == $HOME, and + // $HOME/src has lots of other large non-Go projects in it, + // then the calls to importPathToName below can be expensive. + hasGo := false + for _, child := range children { + // Avoid .foo, _foo, and testdata directory trees. + name := child.Name() + if name == "" || name[0] == '.' || name[0] == '_' || name == "testdata" { + continue + } + if strings.HasSuffix(name, ".go") { + hasGo = true + } + if child.IsDir() { + wg.Add(1) + go func(root, name string) { + defer wg.Done() + loadPkg(wg, root, name) + }(root, filepath.Join(importpath, name)) + } + } + if hasGo { + shortName := importPathToName(importpath) + pkgIndex.Lock() + pkgIndex.m[shortName] = append(pkgIndex.m[shortName], pkg{ + importpath: importpath, + dir: dir, + }) + pkgIndex.Unlock() + } + +} + +// loadExports returns a list exports for a package. +var loadExports = loadExportsGoPath + +func loadExportsGoPath(dir string) map[string]bool { + exports := make(map[string]bool) + buildPkg, err := build.ImportDir(dir, 0) + if err != nil { + if strings.Contains(err.Error(), "no buildable Go source files in") { + return nil + } + fmt.Fprintf(os.Stderr, "could not import %q: %v\n", dir, err) + return nil + } + fset := token.NewFileSet() + for _, files := range [...][]string{buildPkg.GoFiles, buildPkg.CgoFiles} { + for _, file := range files { + f, err := parser.ParseFile(fset, filepath.Join(dir, file), nil, 0) + if err != nil { + fmt.Fprintf(os.Stderr, "could not parse %q: %v\n", file, err) + continue + } + for name := range f.Scope.Objects { + if ast.IsExported(name) { + exports[name] = true + } + } + } + } + return exports +} + +// findImport searches for a package with the given symbols. +// If no package is found, findImport returns "". +// Declared as a variable rather than a function so goimports can be easily +// extended by adding a file with an init function. +var findImport = findImportGoPath + +func findImportGoPath(pkgName string, symbols map[string]bool) (string, bool, error) { + // Fast path for the standard library. + // In the common case we hopefully never have to scan the GOPATH, which can + // be slow with moving disks. + if pkg, rename, ok := findImportStdlib(pkgName, symbols); ok { + return pkg, rename, nil + } + + // TODO(sameer): look at the import lines for other Go files in the + // local directory, since the user is likely to import the same packages + // in the current Go file. Return rename=true when the other Go files + // use a renamed package that's also used in the current file. + + pkgIndexOnce.Do(loadPkgIndex) + + // Collect exports for packages with matching names. + var wg sync.WaitGroup + var pkgsMu sync.Mutex // guards pkgs + // full importpath => exported symbol => True + // e.g. "net/http" => "Client" => True + pkgs := make(map[string]map[string]bool) + pkgIndex.Lock() + for _, pkg := range pkgIndex.m[pkgName] { + wg.Add(1) + go func(importpath, dir string) { + defer wg.Done() + exports := loadExports(dir) + if exports != nil { + pkgsMu.Lock() + pkgs[importpath] = exports + pkgsMu.Unlock() + } + }(pkg.importpath, pkg.dir) + } + pkgIndex.Unlock() + wg.Wait() + + // Filter out packages missing required exported symbols. + for symbol := range symbols { + for importpath, exports := range pkgs { + if !exports[symbol] { + delete(pkgs, importpath) + } + } + } + if len(pkgs) == 0 { + return "", false, nil + } + + // If there are multiple candidate packages, the shortest one wins. + // This is a heuristic to prefer the standard library (e.g. "bytes") + // over e.g. "github.com/foo/bar/bytes". + shortest := "" + for importPath := range pkgs { + if shortest == "" || len(importPath) < len(shortest) { + shortest = importPath + } + } + return shortest, false, nil +} + +type visitFn func(node ast.Node) ast.Visitor + +func (fn visitFn) Visit(node ast.Node) ast.Visitor { + return fn(node) +} + +func findImportStdlib(shortPkg string, symbols map[string]bool) (importPath string, rename, ok bool) { + for symbol := range symbols { + path := stdlib[shortPkg+"."+symbol] + if path == "" { + return "", false, false + } + if importPath != "" && importPath != path { + // Ambiguous. Symbols pointed to different things. + return "", false, false + } + importPath = path + } + return importPath, false, importPath != "" +} diff --git a/vendor/golang.org/x/tools/imports/imports.go b/vendor/golang.org/x/tools/imports/imports.go new file mode 100644 index 0000000..e30946b --- /dev/null +++ b/vendor/golang.org/x/tools/imports/imports.go @@ -0,0 +1,279 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package imports implements a Go pretty-printer (like package "go/format") +// that also adds or removes import statements as necessary. +package imports // import "golang.org/x/tools/imports" + +import ( + "bufio" + "bytes" + "fmt" + "go/ast" + "go/format" + "go/parser" + "go/printer" + "go/token" + "io" + "regexp" + "strconv" + "strings" + + "golang.org/x/tools/go/ast/astutil" +) + +// Options specifies options for processing files. +type Options struct { + Fragment bool // Accept fragment of a source file (no package statement) + AllErrors bool // Report all errors (not just the first 10 on different lines) + + Comments bool // Print comments (true if nil *Options provided) + TabIndent bool // Use tabs for indent (true if nil *Options provided) + TabWidth int // Tab width (8 if nil *Options provided) +} + +// Process formats and adjusts imports for the provided file. +// If opt is nil the defaults are used. +func Process(filename string, src []byte, opt *Options) ([]byte, error) { + if opt == nil { + opt = &Options{Comments: true, TabIndent: true, TabWidth: 8} + } + + fileSet := token.NewFileSet() + file, adjust, err := parse(fileSet, filename, src, opt) + if err != nil { + return nil, err + } + + _, err = fixImports(fileSet, file) + if err != nil { + return nil, err + } + + sortImports(fileSet, file) + imps := astutil.Imports(fileSet, file) + + var spacesBefore []string // import paths we need spaces before + for _, impSection := range imps { + // Within each block of contiguous imports, see if any + // import lines are in different group numbers. If so, + // we'll need to put a space between them so it's + // compatible with gofmt. + lastGroup := -1 + for _, importSpec := range impSection { + importPath, _ := strconv.Unquote(importSpec.Path.Value) + groupNum := importGroup(importPath) + if groupNum != lastGroup && lastGroup != -1 { + spacesBefore = append(spacesBefore, importPath) + } + lastGroup = groupNum + } + + } + + printerMode := printer.UseSpaces + if opt.TabIndent { + printerMode |= printer.TabIndent + } + printConfig := &printer.Config{Mode: printerMode, Tabwidth: opt.TabWidth} + + var buf bytes.Buffer + err = printConfig.Fprint(&buf, fileSet, file) + if err != nil { + return nil, err + } + out := buf.Bytes() + if adjust != nil { + out = adjust(src, out) + } + if len(spacesBefore) > 0 { + out = addImportSpaces(bytes.NewReader(out), spacesBefore) + } + + out, err = format.Source(out) + if err != nil { + return nil, err + } + return out, nil +} + +// parse parses src, which was read from filename, +// as a Go source file or statement list. +func parse(fset *token.FileSet, filename string, src []byte, opt *Options) (*ast.File, func(orig, src []byte) []byte, error) { + parserMode := parser.Mode(0) + if opt.Comments { + parserMode |= parser.ParseComments + } + if opt.AllErrors { + parserMode |= parser.AllErrors + } + + // Try as whole source file. + file, err := parser.ParseFile(fset, filename, src, parserMode) + if err == nil { + return file, nil, nil + } + // If the error is that the source file didn't begin with a + // package line and we accept fragmented input, fall through to + // try as a source fragment. Stop and return on any other error. + if !opt.Fragment || !strings.Contains(err.Error(), "expected 'package'") { + return nil, nil, err + } + + // If this is a declaration list, make it a source file + // by inserting a package clause. + // Insert using a ;, not a newline, so that the line numbers + // in psrc match the ones in src. + psrc := append([]byte("package main;"), src...) + file, err = parser.ParseFile(fset, filename, psrc, parserMode) + if err == nil { + // If a main function exists, we will assume this is a main + // package and leave the file. + if containsMainFunc(file) { + return file, nil, nil + } + + adjust := func(orig, src []byte) []byte { + // Remove the package clause. + // Gofmt has turned the ; into a \n. + src = src[len("package main\n"):] + return matchSpace(orig, src) + } + return file, adjust, nil + } + // If the error is that the source file didn't begin with a + // declaration, fall through to try as a statement list. + // Stop and return on any other error. + if !strings.Contains(err.Error(), "expected declaration") { + return nil, nil, err + } + + // If this is a statement list, make it a source file + // by inserting a package clause and turning the list + // into a function body. This handles expressions too. + // Insert using a ;, not a newline, so that the line numbers + // in fsrc match the ones in src. + fsrc := append(append([]byte("package p; func _() {"), src...), '}') + file, err = parser.ParseFile(fset, filename, fsrc, parserMode) + if err == nil { + adjust := func(orig, src []byte) []byte { + // Remove the wrapping. + // Gofmt has turned the ; into a \n\n. + src = src[len("package p\n\nfunc _() {"):] + src = src[:len(src)-len("}\n")] + // Gofmt has also indented the function body one level. + // Remove that indent. + src = bytes.Replace(src, []byte("\n\t"), []byte("\n"), -1) + return matchSpace(orig, src) + } + return file, adjust, nil + } + + // Failed, and out of options. + return nil, nil, err +} + +// containsMainFunc checks if a file contains a function declaration with the +// function signature 'func main()' +func containsMainFunc(file *ast.File) bool { + for _, decl := range file.Decls { + if f, ok := decl.(*ast.FuncDecl); ok { + if f.Name.Name != "main" { + continue + } + + if len(f.Type.Params.List) != 0 { + continue + } + + if f.Type.Results != nil && len(f.Type.Results.List) != 0 { + continue + } + + return true + } + } + + return false +} + +func cutSpace(b []byte) (before, middle, after []byte) { + i := 0 + for i < len(b) && (b[i] == ' ' || b[i] == '\t' || b[i] == '\n') { + i++ + } + j := len(b) + for j > 0 && (b[j-1] == ' ' || b[j-1] == '\t' || b[j-1] == '\n') { + j-- + } + if i <= j { + return b[:i], b[i:j], b[j:] + } + return nil, nil, b[j:] +} + +// matchSpace reformats src to use the same space context as orig. +// 1) If orig begins with blank lines, matchSpace inserts them at the beginning of src. +// 2) matchSpace copies the indentation of the first non-blank line in orig +// to every non-blank line in src. +// 3) matchSpace copies the trailing space from orig and uses it in place +// of src's trailing space. +func matchSpace(orig []byte, src []byte) []byte { + before, _, after := cutSpace(orig) + i := bytes.LastIndex(before, []byte{'\n'}) + before, indent := before[:i+1], before[i+1:] + + _, src, _ = cutSpace(src) + + var b bytes.Buffer + b.Write(before) + for len(src) > 0 { + line := src + if i := bytes.IndexByte(line, '\n'); i >= 0 { + line, src = line[:i+1], line[i+1:] + } else { + src = nil + } + if len(line) > 0 && line[0] != '\n' { // not blank + b.Write(indent) + } + b.Write(line) + } + b.Write(after) + return b.Bytes() +} + +var impLine = regexp.MustCompile(`^\s+(?:[\w\.]+\s+)?"(.+)"`) + +func addImportSpaces(r io.Reader, breaks []string) []byte { + var out bytes.Buffer + sc := bufio.NewScanner(r) + inImports := false + done := false + for sc.Scan() { + s := sc.Text() + + if !inImports && !done && strings.HasPrefix(s, "import") { + inImports = true + } + if inImports && (strings.HasPrefix(s, "var") || + strings.HasPrefix(s, "func") || + strings.HasPrefix(s, "const") || + strings.HasPrefix(s, "type")) { + done = true + inImports = false + } + if inImports && len(breaks) > 0 { + if m := impLine.FindStringSubmatch(s); m != nil { + if m[1] == string(breaks[0]) { + out.WriteByte('\n') + breaks = breaks[1:] + } + } + } + + fmt.Fprintln(&out, s) + } + return out.Bytes() +} diff --git a/vendor/golang.org/x/tools/imports/mkindex.go b/vendor/golang.org/x/tools/imports/mkindex.go new file mode 100644 index 0000000..755e239 --- /dev/null +++ b/vendor/golang.org/x/tools/imports/mkindex.go @@ -0,0 +1,173 @@ +// +build ignore + +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Command mkindex creates the file "pkgindex.go" containing an index of the Go +// standard library. The file is intended to be built as part of the imports +// package, so that the package may be used in environments where a GOROOT is +// not available (such as App Engine). +package main + +import ( + "bytes" + "fmt" + "go/ast" + "go/build" + "go/format" + "go/parser" + "go/token" + "io/ioutil" + "log" + "os" + "path" + "path/filepath" + "strings" +) + +var ( + pkgIndex = make(map[string][]pkg) + exports = make(map[string]map[string]bool) +) + +func main() { + // Don't use GOPATH. + ctx := build.Default + ctx.GOPATH = "" + + // Populate pkgIndex global from GOROOT. + for _, path := range ctx.SrcDirs() { + f, err := os.Open(path) + if err != nil { + log.Print(err) + continue + } + children, err := f.Readdir(-1) + f.Close() + if err != nil { + log.Print(err) + continue + } + for _, child := range children { + if child.IsDir() { + loadPkg(path, child.Name()) + } + } + } + // Populate exports global. + for _, ps := range pkgIndex { + for _, p := range ps { + e := loadExports(p.dir) + if e != nil { + exports[p.dir] = e + } + } + } + + // Construct source file. + var buf bytes.Buffer + fmt.Fprint(&buf, pkgIndexHead) + fmt.Fprintf(&buf, "var pkgIndexMaster = %#v\n", pkgIndex) + fmt.Fprintf(&buf, "var exportsMaster = %#v\n", exports) + src := buf.Bytes() + + // Replace main.pkg type name with pkg. + src = bytes.Replace(src, []byte("main.pkg"), []byte("pkg"), -1) + // Replace actual GOROOT with "/go". + src = bytes.Replace(src, []byte(ctx.GOROOT), []byte("/go"), -1) + // Add some line wrapping. + src = bytes.Replace(src, []byte("}, "), []byte("},\n"), -1) + src = bytes.Replace(src, []byte("true, "), []byte("true,\n"), -1) + + var err error + src, err = format.Source(src) + if err != nil { + log.Fatal(err) + } + + // Write out source file. + err = ioutil.WriteFile("pkgindex.go", src, 0644) + if err != nil { + log.Fatal(err) + } +} + +const pkgIndexHead = `package imports + +func init() { + pkgIndexOnce.Do(func() { + pkgIndex.m = pkgIndexMaster + }) + loadExports = func(dir string) map[string]bool { + return exportsMaster[dir] + } +} +` + +type pkg struct { + importpath string // full pkg import path, e.g. "net/http" + dir string // absolute file path to pkg directory e.g. "/usr/lib/go/src/fmt" +} + +var fset = token.NewFileSet() + +func loadPkg(root, importpath string) { + shortName := path.Base(importpath) + if shortName == "testdata" { + return + } + + dir := filepath.Join(root, importpath) + pkgIndex[shortName] = append(pkgIndex[shortName], pkg{ + importpath: importpath, + dir: dir, + }) + + pkgDir, err := os.Open(dir) + if err != nil { + return + } + children, err := pkgDir.Readdir(-1) + pkgDir.Close() + if err != nil { + return + } + for _, child := range children { + name := child.Name() + if name == "" { + continue + } + if c := name[0]; c == '.' || ('0' <= c && c <= '9') { + continue + } + if child.IsDir() { + loadPkg(root, filepath.Join(importpath, name)) + } + } +} + +func loadExports(dir string) map[string]bool { + exports := make(map[string]bool) + buildPkg, err := build.ImportDir(dir, 0) + if err != nil { + if strings.Contains(err.Error(), "no buildable Go source files in") { + return nil + } + log.Printf("could not import %q: %v", dir, err) + return nil + } + for _, file := range buildPkg.GoFiles { + f, err := parser.ParseFile(fset, filepath.Join(dir, file), nil, 0) + if err != nil { + log.Printf("could not parse %q: %v", file, err) + continue + } + for name := range f.Scope.Objects { + if ast.IsExported(name) { + exports[name] = true + } + } + } + return exports +} diff --git a/vendor/golang.org/x/tools/imports/mkstdlib.go b/vendor/golang.org/x/tools/imports/mkstdlib.go new file mode 100644 index 0000000..c43d325 --- /dev/null +++ b/vendor/golang.org/x/tools/imports/mkstdlib.go @@ -0,0 +1,90 @@ +// +build ignore + +// mkstdlib generates the zstdlib.go file, containing the Go standard +// library API symbols. It's baked into the binary to avoid scanning +// GOPATH in the common case. +package main + +import ( + "bufio" + "bytes" + "fmt" + "go/format" + "io" + "log" + "os" + "path" + "path/filepath" + "regexp" + "sort" + "strings" +) + +func mustOpen(name string) io.Reader { + f, err := os.Open(name) + if err != nil { + log.Fatal(err) + } + return f +} + +func api(base string) string { + return filepath.Join(os.Getenv("GOROOT"), "api", base) +} + +var sym = regexp.MustCompile(`^pkg (\S+).*?, (?:var|func|type|const) ([A-Z]\w*)`) + +func main() { + var buf bytes.Buffer + outf := func(format string, args ...interface{}) { + fmt.Fprintf(&buf, format, args...) + } + outf("// AUTO-GENERATED BY mkstdlib.go\n\n") + outf("package imports\n") + outf("var stdlib = map[string]string{\n") + f := io.MultiReader( + mustOpen(api("go1.txt")), + mustOpen(api("go1.1.txt")), + mustOpen(api("go1.2.txt")), + ) + sc := bufio.NewScanner(f) + fullImport := map[string]string{} // "zip.NewReader" => "archive/zip" + ambiguous := map[string]bool{} + var keys []string + for sc.Scan() { + l := sc.Text() + has := func(v string) bool { return strings.Contains(l, v) } + if has("struct, ") || has("interface, ") || has(", method (") { + continue + } + if m := sym.FindStringSubmatch(l); m != nil { + full := m[1] + key := path.Base(full) + "." + m[2] + if exist, ok := fullImport[key]; ok { + if exist != full { + ambiguous[key] = true + } + } else { + fullImport[key] = full + keys = append(keys, key) + } + } + } + if err := sc.Err(); err != nil { + log.Fatal(err) + } + sort.Strings(keys) + for _, key := range keys { + if ambiguous[key] { + outf("\t// %q is ambiguous\n", key) + } else { + outf("\t%q: %q,\n", key, fullImport[key]) + } + } + outf("}\n") + fmtbuf, err := format.Source(buf.Bytes()) + if err != nil { + log.Fatal(err) + } + os.Stdout.Write(fmtbuf) +} diff --git a/vendor/golang.org/x/tools/imports/sortimports.go b/vendor/golang.org/x/tools/imports/sortimports.go new file mode 100644 index 0000000..68b3dc4 --- /dev/null +++ b/vendor/golang.org/x/tools/imports/sortimports.go @@ -0,0 +1,214 @@ +// +build go1.2 + +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Hacked up copy of go/ast/import.go + +package imports + +import ( + "go/ast" + "go/token" + "sort" + "strconv" +) + +// sortImports sorts runs of consecutive import lines in import blocks in f. +// It also removes duplicate imports when it is possible to do so without data loss. +func sortImports(fset *token.FileSet, f *ast.File) { + for i, d := range f.Decls { + d, ok := d.(*ast.GenDecl) + if !ok || d.Tok != token.IMPORT { + // Not an import declaration, so we're done. + // Imports are always first. + break + } + + if len(d.Specs) == 0 { + // Empty import block, remove it. + f.Decls = append(f.Decls[:i], f.Decls[i+1:]...) + } + + if !d.Lparen.IsValid() { + // Not a block: sorted by default. + continue + } + + // Identify and sort runs of specs on successive lines. + i := 0 + specs := d.Specs[:0] + for j, s := range d.Specs { + if j > i && fset.Position(s.Pos()).Line > 1+fset.Position(d.Specs[j-1].End()).Line { + // j begins a new run. End this one. + specs = append(specs, sortSpecs(fset, f, d.Specs[i:j])...) + i = j + } + } + specs = append(specs, sortSpecs(fset, f, d.Specs[i:])...) + d.Specs = specs + + // Deduping can leave a blank line before the rparen; clean that up. + if len(d.Specs) > 0 { + lastSpec := d.Specs[len(d.Specs)-1] + lastLine := fset.Position(lastSpec.Pos()).Line + if rParenLine := fset.Position(d.Rparen).Line; rParenLine > lastLine+1 { + fset.File(d.Rparen).MergeLine(rParenLine - 1) + } + } + } +} + +func importPath(s ast.Spec) string { + t, err := strconv.Unquote(s.(*ast.ImportSpec).Path.Value) + if err == nil { + return t + } + return "" +} + +func importName(s ast.Spec) string { + n := s.(*ast.ImportSpec).Name + if n == nil { + return "" + } + return n.Name +} + +func importComment(s ast.Spec) string { + c := s.(*ast.ImportSpec).Comment + if c == nil { + return "" + } + return c.Text() +} + +// collapse indicates whether prev may be removed, leaving only next. +func collapse(prev, next ast.Spec) bool { + if importPath(next) != importPath(prev) || importName(next) != importName(prev) { + return false + } + return prev.(*ast.ImportSpec).Comment == nil +} + +type posSpan struct { + Start token.Pos + End token.Pos +} + +func sortSpecs(fset *token.FileSet, f *ast.File, specs []ast.Spec) []ast.Spec { + // Can't short-circuit here even if specs are already sorted, + // since they might yet need deduplication. + // A lone import, however, may be safely ignored. + if len(specs) <= 1 { + return specs + } + + // Record positions for specs. + pos := make([]posSpan, len(specs)) + for i, s := range specs { + pos[i] = posSpan{s.Pos(), s.End()} + } + + // Identify comments in this range. + // Any comment from pos[0].Start to the final line counts. + lastLine := fset.Position(pos[len(pos)-1].End).Line + cstart := len(f.Comments) + cend := len(f.Comments) + for i, g := range f.Comments { + if g.Pos() < pos[0].Start { + continue + } + if i < cstart { + cstart = i + } + if fset.Position(g.End()).Line > lastLine { + cend = i + break + } + } + comments := f.Comments[cstart:cend] + + // Assign each comment to the import spec preceding it. + importComment := map[*ast.ImportSpec][]*ast.CommentGroup{} + specIndex := 0 + for _, g := range comments { + for specIndex+1 < len(specs) && pos[specIndex+1].Start <= g.Pos() { + specIndex++ + } + s := specs[specIndex].(*ast.ImportSpec) + importComment[s] = append(importComment[s], g) + } + + // Sort the import specs by import path. + // Remove duplicates, when possible without data loss. + // Reassign the import paths to have the same position sequence. + // Reassign each comment to abut the end of its spec. + // Sort the comments by new position. + sort.Sort(byImportSpec(specs)) + + // Dedup. Thanks to our sorting, we can just consider + // adjacent pairs of imports. + deduped := specs[:0] + for i, s := range specs { + if i == len(specs)-1 || !collapse(s, specs[i+1]) { + deduped = append(deduped, s) + } else { + p := s.Pos() + fset.File(p).MergeLine(fset.Position(p).Line) + } + } + specs = deduped + + // Fix up comment positions + for i, s := range specs { + s := s.(*ast.ImportSpec) + if s.Name != nil { + s.Name.NamePos = pos[i].Start + } + s.Path.ValuePos = pos[i].Start + s.EndPos = pos[i].End + for _, g := range importComment[s] { + for _, c := range g.List { + c.Slash = pos[i].End + } + } + } + + sort.Sort(byCommentPos(comments)) + + return specs +} + +type byImportSpec []ast.Spec // slice of *ast.ImportSpec + +func (x byImportSpec) Len() int { return len(x) } +func (x byImportSpec) Swap(i, j int) { x[i], x[j] = x[j], x[i] } +func (x byImportSpec) Less(i, j int) bool { + ipath := importPath(x[i]) + jpath := importPath(x[j]) + + igroup := importGroup(ipath) + jgroup := importGroup(jpath) + if igroup != jgroup { + return igroup < jgroup + } + + if ipath != jpath { + return ipath < jpath + } + iname := importName(x[i]) + jname := importName(x[j]) + + if iname != jname { + return iname < jname + } + return importComment(x[i]) < importComment(x[j]) +} + +type byCommentPos []*ast.CommentGroup + +func (x byCommentPos) Len() int { return len(x) } +func (x byCommentPos) Swap(i, j int) { x[i], x[j] = x[j], x[i] } +func (x byCommentPos) Less(i, j int) bool { return x[i].Pos() < x[j].Pos() } diff --git a/vendor/golang.org/x/tools/imports/sortimports_compat.go b/vendor/golang.org/x/tools/imports/sortimports_compat.go new file mode 100644 index 0000000..295f237 --- /dev/null +++ b/vendor/golang.org/x/tools/imports/sortimports_compat.go @@ -0,0 +1,14 @@ +// +build !go1.2 + +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package imports + +import "go/ast" + +// Go 1.1 users don't get fancy package grouping. +// But this is still gofmt-compliant: + +var sortImports = ast.SortImports diff --git a/vendor/golang.org/x/tools/imports/zstdlib.go b/vendor/golang.org/x/tools/imports/zstdlib.go new file mode 100644 index 0000000..6cdc033 --- /dev/null +++ b/vendor/golang.org/x/tools/imports/zstdlib.go @@ -0,0 +1,8374 @@ +// AUTO-GENERATED BY mkstdlib.go + +package imports + +var stdlib = map[string]string{ + "adler32.Checksum": "hash/adler32", + "adler32.New": "hash/adler32", + "adler32.Size": "hash/adler32", + "aes.BlockSize": "crypto/aes", + "aes.KeySizeError": "crypto/aes", + "aes.NewCipher": "crypto/aes", + "ascii85.CorruptInputError": "encoding/ascii85", + "ascii85.Decode": "encoding/ascii85", + "ascii85.Encode": "encoding/ascii85", + "ascii85.MaxEncodedLen": "encoding/ascii85", + "ascii85.NewDecoder": "encoding/ascii85", + "ascii85.NewEncoder": "encoding/ascii85", + "asn1.BitString": "encoding/asn1", + "asn1.Enumerated": "encoding/asn1", + "asn1.Flag": "encoding/asn1", + "asn1.Marshal": "encoding/asn1", + "asn1.ObjectIdentifier": "encoding/asn1", + "asn1.RawContent": "encoding/asn1", + "asn1.RawValue": "encoding/asn1", + "asn1.StructuralError": "encoding/asn1", + "asn1.SyntaxError": "encoding/asn1", + "asn1.Unmarshal": "encoding/asn1", + "asn1.UnmarshalWithParams": "encoding/asn1", + "ast.ArrayType": "go/ast", + "ast.AssignStmt": "go/ast", + "ast.Bad": "go/ast", + "ast.BadDecl": "go/ast", + "ast.BadExpr": "go/ast", + "ast.BadStmt": "go/ast", + "ast.BasicLit": "go/ast", + "ast.BinaryExpr": "go/ast", + "ast.BlockStmt": "go/ast", + "ast.BranchStmt": "go/ast", + "ast.CallExpr": "go/ast", + "ast.CaseClause": "go/ast", + "ast.ChanDir": "go/ast", + "ast.ChanType": "go/ast", + "ast.CommClause": "go/ast", + "ast.Comment": "go/ast", + "ast.CommentGroup": "go/ast", + "ast.CommentMap": "go/ast", + "ast.CompositeLit": "go/ast", + "ast.Con": "go/ast", + "ast.DeclStmt": "go/ast", + "ast.DeferStmt": "go/ast", + "ast.Ellipsis": "go/ast", + "ast.EmptyStmt": "go/ast", + "ast.ExprStmt": "go/ast", + "ast.Field": "go/ast", + "ast.FieldFilter": "go/ast", + "ast.FieldList": "go/ast", + "ast.File": "go/ast", + "ast.FileExports": "go/ast", + "ast.Filter": "go/ast", + "ast.FilterDecl": "go/ast", + "ast.FilterFile": "go/ast", + "ast.FilterFuncDuplicates": "go/ast", + "ast.FilterImportDuplicates": "go/ast", + "ast.FilterPackage": "go/ast", + "ast.FilterUnassociatedComments": "go/ast", + "ast.ForStmt": "go/ast", + "ast.Fprint": "go/ast", + "ast.Fun": "go/ast", + "ast.FuncDecl": "go/ast", + "ast.FuncLit": "go/ast", + "ast.FuncType": "go/ast", + "ast.GenDecl": "go/ast", + "ast.GoStmt": "go/ast", + "ast.Ident": "go/ast", + "ast.IfStmt": "go/ast", + "ast.ImportSpec": "go/ast", + "ast.Importer": "go/ast", + "ast.IncDecStmt": "go/ast", + "ast.IndexExpr": "go/ast", + "ast.Inspect": "go/ast", + "ast.InterfaceType": "go/ast", + "ast.IsExported": "go/ast", + "ast.KeyValueExpr": "go/ast", + "ast.LabeledStmt": "go/ast", + "ast.Lbl": "go/ast", + "ast.MapType": "go/ast", + "ast.MergeMode": "go/ast", + "ast.MergePackageFiles": "go/ast", + "ast.NewCommentMap": "go/ast", + "ast.NewIdent": "go/ast", + "ast.NewObj": "go/ast", + "ast.NewPackage": "go/ast", + "ast.NewScope": "go/ast", + "ast.Node": "go/ast", + "ast.NotNilFilter": "go/ast", + "ast.ObjKind": "go/ast", + "ast.Object": "go/ast", + "ast.Package": "go/ast", + "ast.PackageExports": "go/ast", + "ast.ParenExpr": "go/ast", + "ast.Pkg": "go/ast", + "ast.Print": "go/ast", + "ast.RECV": "go/ast", + "ast.RangeStmt": "go/ast", + "ast.ReturnStmt": "go/ast", + "ast.SEND": "go/ast", + "ast.Scope": "go/ast", + "ast.SelectStmt": "go/ast", + "ast.SelectorExpr": "go/ast", + "ast.SendStmt": "go/ast", + "ast.SliceExpr": "go/ast", + "ast.SortImports": "go/ast", + "ast.StarExpr": "go/ast", + "ast.StructType": "go/ast", + "ast.SwitchStmt": "go/ast", + "ast.Typ": "go/ast", + "ast.TypeAssertExpr": "go/ast", + "ast.TypeSpec": "go/ast", + "ast.TypeSwitchStmt": "go/ast", + "ast.UnaryExpr": "go/ast", + "ast.ValueSpec": "go/ast", + "ast.Var": "go/ast", + "ast.Visitor": "go/ast", + "ast.Walk": "go/ast", + "atomic.AddInt32": "sync/atomic", + "atomic.AddInt64": "sync/atomic", + "atomic.AddUint32": "sync/atomic", + "atomic.AddUint64": "sync/atomic", + "atomic.AddUintptr": "sync/atomic", + "atomic.CompareAndSwapInt32": "sync/atomic", + "atomic.CompareAndSwapInt64": "sync/atomic", + "atomic.CompareAndSwapPointer": "sync/atomic", + "atomic.CompareAndSwapUint32": "sync/atomic", + "atomic.CompareAndSwapUint64": "sync/atomic", + "atomic.CompareAndSwapUintptr": "sync/atomic", + "atomic.LoadInt32": "sync/atomic", + "atomic.LoadInt64": "sync/atomic", + "atomic.LoadPointer": "sync/atomic", + "atomic.LoadUint32": "sync/atomic", + "atomic.LoadUint64": "sync/atomic", + "atomic.LoadUintptr": "sync/atomic", + "atomic.StoreInt32": "sync/atomic", + "atomic.StoreInt64": "sync/atomic", + "atomic.StorePointer": "sync/atomic", + "atomic.StoreUint32": "sync/atomic", + "atomic.StoreUint64": "sync/atomic", + "atomic.StoreUintptr": "sync/atomic", + "atomic.SwapInt32": "sync/atomic", + "atomic.SwapInt64": "sync/atomic", + "atomic.SwapPointer": "sync/atomic", + "atomic.SwapUint32": "sync/atomic", + "atomic.SwapUint64": "sync/atomic", + "atomic.SwapUintptr": "sync/atomic", + "base32.CorruptInputError": "encoding/base32", + "base32.Encoding": "encoding/base32", + "base32.HexEncoding": "encoding/base32", + "base32.NewDecoder": "encoding/base32", + "base32.NewEncoder": "encoding/base32", + "base32.NewEncoding": "encoding/base32", + "base32.StdEncoding": "encoding/base32", + "base64.CorruptInputError": "encoding/base64", + "base64.Encoding": "encoding/base64", + "base64.NewDecoder": "encoding/base64", + "base64.NewEncoder": "encoding/base64", + "base64.NewEncoding": "encoding/base64", + "base64.StdEncoding": "encoding/base64", + "base64.URLEncoding": "encoding/base64", + "big.Int": "math/big", + "big.MaxBase": "math/big", + "big.NewInt": "math/big", + "big.NewRat": "math/big", + "big.Rat": "math/big", + "big.Word": "math/big", + "binary.BigEndian": "encoding/binary", + "binary.ByteOrder": "encoding/binary", + "binary.LittleEndian": "encoding/binary", + "binary.MaxVarintLen16": "encoding/binary", + "binary.MaxVarintLen32": "encoding/binary", + "binary.MaxVarintLen64": "encoding/binary", + "binary.PutUvarint": "encoding/binary", + "binary.PutVarint": "encoding/binary", + "binary.Read": "encoding/binary", + "binary.ReadUvarint": "encoding/binary", + "binary.ReadVarint": "encoding/binary", + "binary.Size": "encoding/binary", + "binary.Uvarint": "encoding/binary", + "binary.Varint": "encoding/binary", + "binary.Write": "encoding/binary", + "bufio.ErrAdvanceTooFar": "bufio", + "bufio.ErrBufferFull": "bufio", + "bufio.ErrInvalidUnreadByte": "bufio", + "bufio.ErrInvalidUnreadRune": "bufio", + "bufio.ErrNegativeAdvance": "bufio", + "bufio.ErrNegativeCount": "bufio", + "bufio.ErrTooLong": "bufio", + "bufio.MaxScanTokenSize": "bufio", + "bufio.NewReadWriter": "bufio", + "bufio.NewReader": "bufio", + "bufio.NewReaderSize": "bufio", + "bufio.NewScanner": "bufio", + "bufio.NewWriter": "bufio", + "bufio.NewWriterSize": "bufio", + "bufio.ReadWriter": "bufio", + "bufio.Reader": "bufio", + "bufio.ScanBytes": "bufio", + "bufio.ScanLines": "bufio", + "bufio.ScanRunes": "bufio", + "bufio.ScanWords": "bufio", + "bufio.Scanner": "bufio", + "bufio.SplitFunc": "bufio", + "bufio.Writer": "bufio", + "build.AllowBinary": "go/build", + "build.ArchChar": "go/build", + "build.Context": "go/build", + "build.Default": "go/build", + "build.FindOnly": "go/build", + "build.Import": "go/build", + "build.ImportDir": "go/build", + "build.ImportMode": "go/build", + "build.IsLocalImport": "go/build", + "build.NoGoError": "go/build", + "build.Package": "go/build", + "build.ToolDir": "go/build", + "bytes.Buffer": "bytes", + "bytes.Compare": "bytes", + "bytes.Contains": "bytes", + "bytes.Count": "bytes", + "bytes.Equal": "bytes", + "bytes.EqualFold": "bytes", + "bytes.ErrTooLarge": "bytes", + "bytes.Fields": "bytes", + "bytes.FieldsFunc": "bytes", + "bytes.HasPrefix": "bytes", + "bytes.HasSuffix": "bytes", + "bytes.Index": "bytes", + "bytes.IndexAny": "bytes", + "bytes.IndexByte": "bytes", + "bytes.IndexFunc": "bytes", + "bytes.IndexRune": "bytes", + "bytes.Join": "bytes", + "bytes.LastIndex": "bytes", + "bytes.LastIndexAny": "bytes", + "bytes.LastIndexFunc": "bytes", + "bytes.Map": "bytes", + "bytes.MinRead": "bytes", + "bytes.NewBuffer": "bytes", + "bytes.NewBufferString": "bytes", + "bytes.NewReader": "bytes", + "bytes.Reader": "bytes", + "bytes.Repeat": "bytes", + "bytes.Replace": "bytes", + "bytes.Runes": "bytes", + "bytes.Split": "bytes", + "bytes.SplitAfter": "bytes", + "bytes.SplitAfterN": "bytes", + "bytes.SplitN": "bytes", + "bytes.Title": "bytes", + "bytes.ToLower": "bytes", + "bytes.ToLowerSpecial": "bytes", + "bytes.ToTitle": "bytes", + "bytes.ToTitleSpecial": "bytes", + "bytes.ToUpper": "bytes", + "bytes.ToUpperSpecial": "bytes", + "bytes.Trim": "bytes", + "bytes.TrimFunc": "bytes", + "bytes.TrimLeft": "bytes", + "bytes.TrimLeftFunc": "bytes", + "bytes.TrimPrefix": "bytes", + "bytes.TrimRight": "bytes", + "bytes.TrimRightFunc": "bytes", + "bytes.TrimSpace": "bytes", + "bytes.TrimSuffix": "bytes", + "bzip2.NewReader": "compress/bzip2", + "bzip2.StructuralError": "compress/bzip2", + "cgi.Handler": "net/http/cgi", + "cgi.Request": "net/http/cgi", + "cgi.RequestFromMap": "net/http/cgi", + "cgi.Serve": "net/http/cgi", + "cipher.AEAD": "crypto/cipher", + "cipher.Block": "crypto/cipher", + "cipher.BlockMode": "crypto/cipher", + "cipher.NewCBCDecrypter": "crypto/cipher", + "cipher.NewCBCEncrypter": "crypto/cipher", + "cipher.NewCFBDecrypter": "crypto/cipher", + "cipher.NewCFBEncrypter": "crypto/cipher", + "cipher.NewCTR": "crypto/cipher", + "cipher.NewGCM": "crypto/cipher", + "cipher.NewOFB": "crypto/cipher", + "cipher.Stream": "crypto/cipher", + "cipher.StreamReader": "crypto/cipher", + "cipher.StreamWriter": "crypto/cipher", + "cmplx.Abs": "math/cmplx", + "cmplx.Acos": "math/cmplx", + "cmplx.Acosh": "math/cmplx", + "cmplx.Asin": "math/cmplx", + "cmplx.Asinh": "math/cmplx", + "cmplx.Atan": "math/cmplx", + "cmplx.Atanh": "math/cmplx", + "cmplx.Conj": "math/cmplx", + "cmplx.Cos": "math/cmplx", + "cmplx.Cosh": "math/cmplx", + "cmplx.Cot": "math/cmplx", + "cmplx.Exp": "math/cmplx", + "cmplx.Inf": "math/cmplx", + "cmplx.IsInf": "math/cmplx", + "cmplx.IsNaN": "math/cmplx", + "cmplx.Log": "math/cmplx", + "cmplx.Log10": "math/cmplx", + "cmplx.NaN": "math/cmplx", + "cmplx.Phase": "math/cmplx", + "cmplx.Polar": "math/cmplx", + "cmplx.Pow": "math/cmplx", + "cmplx.Rect": "math/cmplx", + "cmplx.Sin": "math/cmplx", + "cmplx.Sinh": "math/cmplx", + "cmplx.Sqrt": "math/cmplx", + "cmplx.Tan": "math/cmplx", + "cmplx.Tanh": "math/cmplx", + "color.Alpha": "image/color", + "color.Alpha16": "image/color", + "color.Alpha16Model": "image/color", + "color.AlphaModel": "image/color", + "color.Black": "image/color", + "color.Color": "image/color", + "color.Gray": "image/color", + "color.Gray16": "image/color", + "color.Gray16Model": "image/color", + "color.GrayModel": "image/color", + "color.Model": "image/color", + "color.ModelFunc": "image/color", + "color.NRGBA": "image/color", + "color.NRGBA64": "image/color", + "color.NRGBA64Model": "image/color", + "color.NRGBAModel": "image/color", + "color.Opaque": "image/color", + "color.Palette": "image/color", + "color.RGBA": "image/color", + "color.RGBA64": "image/color", + "color.RGBA64Model": "image/color", + "color.RGBAModel": "image/color", + "color.RGBToYCbCr": "image/color", + "color.Transparent": "image/color", + "color.White": "image/color", + "color.YCbCr": "image/color", + "color.YCbCrModel": "image/color", + "color.YCbCrToRGB": "image/color", + "cookiejar.Jar": "net/http/cookiejar", + "cookiejar.New": "net/http/cookiejar", + "cookiejar.Options": "net/http/cookiejar", + "cookiejar.PublicSuffixList": "net/http/cookiejar", + "crc32.Castagnoli": "hash/crc32", + "crc32.Checksum": "hash/crc32", + "crc32.ChecksumIEEE": "hash/crc32", + "crc32.IEEE": "hash/crc32", + "crc32.IEEETable": "hash/crc32", + "crc32.Koopman": "hash/crc32", + "crc32.MakeTable": "hash/crc32", + "crc32.New": "hash/crc32", + "crc32.NewIEEE": "hash/crc32", + "crc32.Size": "hash/crc32", + "crc32.Table": "hash/crc32", + "crc32.Update": "hash/crc32", + "crc64.Checksum": "hash/crc64", + "crc64.ECMA": "hash/crc64", + "crc64.ISO": "hash/crc64", + "crc64.MakeTable": "hash/crc64", + "crc64.New": "hash/crc64", + "crc64.Size": "hash/crc64", + "crc64.Table": "hash/crc64", + "crc64.Update": "hash/crc64", + "crypto.Hash": "crypto", + "crypto.MD4": "crypto", + "crypto.MD5": "crypto", + "crypto.MD5SHA1": "crypto", + "crypto.PrivateKey": "crypto", + "crypto.PublicKey": "crypto", + "crypto.RIPEMD160": "crypto", + "crypto.RegisterHash": "crypto", + "crypto.SHA1": "crypto", + "crypto.SHA224": "crypto", + "crypto.SHA256": "crypto", + "crypto.SHA384": "crypto", + "crypto.SHA512": "crypto", + "csv.ErrBareQuote": "encoding/csv", + "csv.ErrFieldCount": "encoding/csv", + "csv.ErrQuote": "encoding/csv", + "csv.ErrTrailingComma": "encoding/csv", + "csv.NewReader": "encoding/csv", + "csv.NewWriter": "encoding/csv", + "csv.ParseError": "encoding/csv", + "csv.Reader": "encoding/csv", + "csv.Writer": "encoding/csv", + "debug.FreeOSMemory": "runtime/debug", + "debug.GCStats": "runtime/debug", + "debug.PrintStack": "runtime/debug", + "debug.ReadGCStats": "runtime/debug", + "debug.SetGCPercent": "runtime/debug", + "debug.SetMaxStack": "runtime/debug", + "debug.SetMaxThreads": "runtime/debug", + "debug.Stack": "runtime/debug", + "des.BlockSize": "crypto/des", + "des.KeySizeError": "crypto/des", + "des.NewCipher": "crypto/des", + "des.NewTripleDESCipher": "crypto/des", + "doc.AllDecls": "go/doc", + "doc.AllMethods": "go/doc", + "doc.Example": "go/doc", + "doc.Examples": "go/doc", + "doc.Filter": "go/doc", + "doc.Func": "go/doc", + "doc.IllegalPrefixes": "go/doc", + "doc.Mode": "go/doc", + "doc.New": "go/doc", + "doc.Note": "go/doc", + "doc.Package": "go/doc", + "doc.Synopsis": "go/doc", + "doc.ToHTML": "go/doc", + "doc.ToText": "go/doc", + "doc.Type": "go/doc", + "doc.Value": "go/doc", + "draw.Draw": "image/draw", + "draw.DrawMask": "image/draw", + "draw.Drawer": "image/draw", + "draw.FloydSteinberg": "image/draw", + "draw.Image": "image/draw", + "draw.Op": "image/draw", + "draw.Over": "image/draw", + "draw.Quantizer": "image/draw", + "draw.Src": "image/draw", + "driver.Bool": "database/sql/driver", + "driver.ColumnConverter": "database/sql/driver", + "driver.Conn": "database/sql/driver", + "driver.DefaultParameterConverter": "database/sql/driver", + "driver.Driver": "database/sql/driver", + "driver.ErrBadConn": "database/sql/driver", + "driver.ErrSkip": "database/sql/driver", + "driver.Execer": "database/sql/driver", + "driver.Int32": "database/sql/driver", + "driver.IsScanValue": "database/sql/driver", + "driver.IsValue": "database/sql/driver", + "driver.NotNull": "database/sql/driver", + "driver.Null": "database/sql/driver", + "driver.Queryer": "database/sql/driver", + "driver.Result": "database/sql/driver", + "driver.ResultNoRows": "database/sql/driver", + "driver.Rows": "database/sql/driver", + "driver.RowsAffected": "database/sql/driver", + "driver.Stmt": "database/sql/driver", + "driver.String": "database/sql/driver", + "driver.Tx": "database/sql/driver", + "driver.Value": "database/sql/driver", + "driver.ValueConverter": "database/sql/driver", + "driver.Valuer": "database/sql/driver", + "dsa.ErrInvalidPublicKey": "crypto/dsa", + "dsa.GenerateKey": "crypto/dsa", + "dsa.GenerateParameters": "crypto/dsa", + "dsa.L1024N160": "crypto/dsa", + "dsa.L2048N224": "crypto/dsa", + "dsa.L2048N256": "crypto/dsa", + "dsa.L3072N256": "crypto/dsa", + "dsa.ParameterSizes": "crypto/dsa", + "dsa.Parameters": "crypto/dsa", + "dsa.PrivateKey": "crypto/dsa", + "dsa.PublicKey": "crypto/dsa", + "dsa.Sign": "crypto/dsa", + "dsa.Verify": "crypto/dsa", + "dwarf.AddrType": "debug/dwarf", + "dwarf.ArrayType": "debug/dwarf", + "dwarf.Attr": "debug/dwarf", + "dwarf.AttrAbstractOrigin": "debug/dwarf", + "dwarf.AttrAccessibility": "debug/dwarf", + "dwarf.AttrAddrClass": "debug/dwarf", + "dwarf.AttrAllocated": "debug/dwarf", + "dwarf.AttrArtificial": "debug/dwarf", + "dwarf.AttrAssociated": "debug/dwarf", + "dwarf.AttrBaseTypes": "debug/dwarf", + "dwarf.AttrBitOffset": "debug/dwarf", + "dwarf.AttrBitSize": "debug/dwarf", + "dwarf.AttrByteSize": "debug/dwarf", + "dwarf.AttrCallColumn": "debug/dwarf", + "dwarf.AttrCallFile": "debug/dwarf", + "dwarf.AttrCallLine": "debug/dwarf", + "dwarf.AttrCalling": "debug/dwarf", + "dwarf.AttrCommonRef": "debug/dwarf", + "dwarf.AttrCompDir": "debug/dwarf", + "dwarf.AttrConstValue": "debug/dwarf", + "dwarf.AttrContainingType": "debug/dwarf", + "dwarf.AttrCount": "debug/dwarf", + "dwarf.AttrDataLocation": "debug/dwarf", + "dwarf.AttrDataMemberLoc": "debug/dwarf", + "dwarf.AttrDeclColumn": "debug/dwarf", + "dwarf.AttrDeclFile": "debug/dwarf", + "dwarf.AttrDeclLine": "debug/dwarf", + "dwarf.AttrDeclaration": "debug/dwarf", + "dwarf.AttrDefaultValue": "debug/dwarf", + "dwarf.AttrDescription": "debug/dwarf", + "dwarf.AttrDiscr": "debug/dwarf", + "dwarf.AttrDiscrList": "debug/dwarf", + "dwarf.AttrDiscrValue": "debug/dwarf", + "dwarf.AttrEncoding": "debug/dwarf", + "dwarf.AttrEntrypc": "debug/dwarf", + "dwarf.AttrExtension": "debug/dwarf", + "dwarf.AttrExternal": "debug/dwarf", + "dwarf.AttrFrameBase": "debug/dwarf", + "dwarf.AttrFriend": "debug/dwarf", + "dwarf.AttrHighpc": "debug/dwarf", + "dwarf.AttrIdentifierCase": "debug/dwarf", + "dwarf.AttrImport": "debug/dwarf", + "dwarf.AttrInline": "debug/dwarf", + "dwarf.AttrIsOptional": "debug/dwarf", + "dwarf.AttrLanguage": "debug/dwarf", + "dwarf.AttrLocation": "debug/dwarf", + "dwarf.AttrLowerBound": "debug/dwarf", + "dwarf.AttrLowpc": "debug/dwarf", + "dwarf.AttrMacroInfo": "debug/dwarf", + "dwarf.AttrName": "debug/dwarf", + "dwarf.AttrNamelistItem": "debug/dwarf", + "dwarf.AttrOrdering": "debug/dwarf", + "dwarf.AttrPriority": "debug/dwarf", + "dwarf.AttrProducer": "debug/dwarf", + "dwarf.AttrPrototyped": "debug/dwarf", + "dwarf.AttrRanges": "debug/dwarf", + "dwarf.AttrReturnAddr": "debug/dwarf", + "dwarf.AttrSegment": "debug/dwarf", + "dwarf.AttrSibling": "debug/dwarf", + "dwarf.AttrSpecification": "debug/dwarf", + "dwarf.AttrStartScope": "debug/dwarf", + "dwarf.AttrStaticLink": "debug/dwarf", + "dwarf.AttrStmtList": "debug/dwarf", + "dwarf.AttrStride": "debug/dwarf", + "dwarf.AttrStrideSize": "debug/dwarf", + "dwarf.AttrStringLength": "debug/dwarf", + "dwarf.AttrTrampoline": "debug/dwarf", + "dwarf.AttrType": "debug/dwarf", + "dwarf.AttrUpperBound": "debug/dwarf", + "dwarf.AttrUseLocation": "debug/dwarf", + "dwarf.AttrUseUTF8": "debug/dwarf", + "dwarf.AttrVarParam": "debug/dwarf", + "dwarf.AttrVirtuality": "debug/dwarf", + "dwarf.AttrVisibility": "debug/dwarf", + "dwarf.AttrVtableElemLoc": "debug/dwarf", + "dwarf.BasicType": "debug/dwarf", + "dwarf.BoolType": "debug/dwarf", + "dwarf.CharType": "debug/dwarf", + "dwarf.CommonType": "debug/dwarf", + "dwarf.ComplexType": "debug/dwarf", + "dwarf.Data": "debug/dwarf", + "dwarf.DecodeError": "debug/dwarf", + "dwarf.DotDotDotType": "debug/dwarf", + "dwarf.Entry": "debug/dwarf", + "dwarf.EnumType": "debug/dwarf", + "dwarf.EnumValue": "debug/dwarf", + "dwarf.Field": "debug/dwarf", + "dwarf.FloatType": "debug/dwarf", + "dwarf.FuncType": "debug/dwarf", + "dwarf.IntType": "debug/dwarf", + "dwarf.New": "debug/dwarf", + "dwarf.Offset": "debug/dwarf", + "dwarf.PtrType": "debug/dwarf", + "dwarf.QualType": "debug/dwarf", + "dwarf.Reader": "debug/dwarf", + "dwarf.StructField": "debug/dwarf", + "dwarf.StructType": "debug/dwarf", + "dwarf.Tag": "debug/dwarf", + "dwarf.TagAccessDeclaration": "debug/dwarf", + "dwarf.TagArrayType": "debug/dwarf", + "dwarf.TagBaseType": "debug/dwarf", + "dwarf.TagCatchDwarfBlock": "debug/dwarf", + "dwarf.TagClassType": "debug/dwarf", + "dwarf.TagCommonDwarfBlock": "debug/dwarf", + "dwarf.TagCommonInclusion": "debug/dwarf", + "dwarf.TagCompileUnit": "debug/dwarf", + "dwarf.TagConstType": "debug/dwarf", + "dwarf.TagConstant": "debug/dwarf", + "dwarf.TagDwarfProcedure": "debug/dwarf", + "dwarf.TagEntryPoint": "debug/dwarf", + "dwarf.TagEnumerationType": "debug/dwarf", + "dwarf.TagEnumerator": "debug/dwarf", + "dwarf.TagFileType": "debug/dwarf", + "dwarf.TagFormalParameter": "debug/dwarf", + "dwarf.TagFriend": "debug/dwarf", + "dwarf.TagImportedDeclaration": "debug/dwarf", + "dwarf.TagImportedModule": "debug/dwarf", + "dwarf.TagImportedUnit": "debug/dwarf", + "dwarf.TagInheritance": "debug/dwarf", + "dwarf.TagInlinedSubroutine": "debug/dwarf", + "dwarf.TagInterfaceType": "debug/dwarf", + "dwarf.TagLabel": "debug/dwarf", + "dwarf.TagLexDwarfBlock": "debug/dwarf", + "dwarf.TagMember": "debug/dwarf", + "dwarf.TagModule": "debug/dwarf", + "dwarf.TagMutableType": "debug/dwarf", + "dwarf.TagNamelist": "debug/dwarf", + "dwarf.TagNamelistItem": "debug/dwarf", + "dwarf.TagNamespace": "debug/dwarf", + "dwarf.TagPackedType": "debug/dwarf", + "dwarf.TagPartialUnit": "debug/dwarf", + "dwarf.TagPointerType": "debug/dwarf", + "dwarf.TagPtrToMemberType": "debug/dwarf", + "dwarf.TagReferenceType": "debug/dwarf", + "dwarf.TagRestrictType": "debug/dwarf", + "dwarf.TagSetType": "debug/dwarf", + "dwarf.TagStringType": "debug/dwarf", + "dwarf.TagStructType": "debug/dwarf", + "dwarf.TagSubprogram": "debug/dwarf", + "dwarf.TagSubrangeType": "debug/dwarf", + "dwarf.TagSubroutineType": "debug/dwarf", + "dwarf.TagTemplateTypeParameter": "debug/dwarf", + "dwarf.TagTemplateValueParameter": "debug/dwarf", + "dwarf.TagThrownType": "debug/dwarf", + "dwarf.TagTryDwarfBlock": "debug/dwarf", + 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"elf.R_PPC_TPREL32": "debug/elf", + "elf.R_PPC_UADDR16": "debug/elf", + "elf.R_PPC_UADDR32": "debug/elf", + "elf.R_SPARC": "debug/elf", + "elf.R_SPARC_10": "debug/elf", + "elf.R_SPARC_11": "debug/elf", + "elf.R_SPARC_13": "debug/elf", + "elf.R_SPARC_16": "debug/elf", + "elf.R_SPARC_22": "debug/elf", + "elf.R_SPARC_32": "debug/elf", + "elf.R_SPARC_5": "debug/elf", + "elf.R_SPARC_6": "debug/elf", + "elf.R_SPARC_64": "debug/elf", + "elf.R_SPARC_7": "debug/elf", + "elf.R_SPARC_8": "debug/elf", + "elf.R_SPARC_COPY": "debug/elf", + "elf.R_SPARC_DISP16": "debug/elf", + "elf.R_SPARC_DISP32": "debug/elf", + "elf.R_SPARC_DISP64": "debug/elf", + "elf.R_SPARC_DISP8": "debug/elf", + "elf.R_SPARC_GLOB_DAT": "debug/elf", + "elf.R_SPARC_GLOB_JMP": "debug/elf", + "elf.R_SPARC_GOT10": "debug/elf", + "elf.R_SPARC_GOT13": "debug/elf", + "elf.R_SPARC_GOT22": "debug/elf", + "elf.R_SPARC_H44": "debug/elf", + "elf.R_SPARC_HH22": "debug/elf", + "elf.R_SPARC_HI22": "debug/elf", + "elf.R_SPARC_HIPLT22": "debug/elf", + "elf.R_SPARC_HIX22": "debug/elf", + "elf.R_SPARC_HM10": "debug/elf", + "elf.R_SPARC_JMP_SLOT": "debug/elf", + "elf.R_SPARC_L44": "debug/elf", + "elf.R_SPARC_LM22": "debug/elf", + "elf.R_SPARC_LO10": "debug/elf", + "elf.R_SPARC_LOPLT10": "debug/elf", + "elf.R_SPARC_LOX10": "debug/elf", + "elf.R_SPARC_M44": "debug/elf", + "elf.R_SPARC_NONE": "debug/elf", + "elf.R_SPARC_OLO10": "debug/elf", + "elf.R_SPARC_PC10": "debug/elf", + "elf.R_SPARC_PC22": "debug/elf", + "elf.R_SPARC_PCPLT10": "debug/elf", + "elf.R_SPARC_PCPLT22": "debug/elf", + "elf.R_SPARC_PCPLT32": "debug/elf", + "elf.R_SPARC_PC_HH22": "debug/elf", + "elf.R_SPARC_PC_HM10": "debug/elf", + "elf.R_SPARC_PC_LM22": "debug/elf", + "elf.R_SPARC_PLT32": "debug/elf", + "elf.R_SPARC_PLT64": "debug/elf", + "elf.R_SPARC_REGISTER": "debug/elf", + "elf.R_SPARC_RELATIVE": "debug/elf", + "elf.R_SPARC_UA16": "debug/elf", + "elf.R_SPARC_UA32": "debug/elf", + "elf.R_SPARC_UA64": "debug/elf", + "elf.R_SPARC_WDISP16": "debug/elf", + "elf.R_SPARC_WDISP19": "debug/elf", + "elf.R_SPARC_WDISP22": "debug/elf", + "elf.R_SPARC_WDISP30": "debug/elf", + "elf.R_SPARC_WPLT30": "debug/elf", + "elf.R_SYM32": "debug/elf", + "elf.R_SYM64": "debug/elf", + "elf.R_TYPE32": "debug/elf", + "elf.R_TYPE64": "debug/elf", + "elf.R_X86_64": "debug/elf", + "elf.R_X86_64_16": "debug/elf", + "elf.R_X86_64_32": "debug/elf", + "elf.R_X86_64_32S": "debug/elf", + "elf.R_X86_64_64": "debug/elf", + "elf.R_X86_64_8": "debug/elf", + "elf.R_X86_64_COPY": "debug/elf", + "elf.R_X86_64_DTPMOD64": "debug/elf", + "elf.R_X86_64_DTPOFF32": "debug/elf", + "elf.R_X86_64_DTPOFF64": "debug/elf", + "elf.R_X86_64_GLOB_DAT": "debug/elf", + "elf.R_X86_64_GOT32": "debug/elf", + "elf.R_X86_64_GOTPCREL": "debug/elf", + "elf.R_X86_64_GOTTPOFF": "debug/elf", + "elf.R_X86_64_JMP_SLOT": "debug/elf", + "elf.R_X86_64_NONE": "debug/elf", + "elf.R_X86_64_PC16": "debug/elf", + "elf.R_X86_64_PC32": "debug/elf", + "elf.R_X86_64_PC8": "debug/elf", + "elf.R_X86_64_PLT32": "debug/elf", + "elf.R_X86_64_RELATIVE": "debug/elf", + "elf.R_X86_64_TLSGD": "debug/elf", + "elf.R_X86_64_TLSLD": "debug/elf", + "elf.R_X86_64_TPOFF32": "debug/elf", + "elf.R_X86_64_TPOFF64": "debug/elf", + "elf.Rel32": "debug/elf", + "elf.Rel64": "debug/elf", + "elf.Rela32": "debug/elf", + "elf.Rela64": "debug/elf", + "elf.SHF_ALLOC": "debug/elf", + "elf.SHF_EXECINSTR": "debug/elf", + "elf.SHF_GROUP": "debug/elf", + "elf.SHF_INFO_LINK": "debug/elf", + "elf.SHF_LINK_ORDER": "debug/elf", + "elf.SHF_MASKOS": "debug/elf", + "elf.SHF_MASKPROC": "debug/elf", + "elf.SHF_MERGE": "debug/elf", + "elf.SHF_OS_NONCONFORMING": "debug/elf", + "elf.SHF_STRINGS": "debug/elf", + "elf.SHF_TLS": "debug/elf", + "elf.SHF_WRITE": "debug/elf", + "elf.SHN_ABS": "debug/elf", + "elf.SHN_COMMON": "debug/elf", + "elf.SHN_HIOS": "debug/elf", + "elf.SHN_HIPROC": "debug/elf", + "elf.SHN_HIRESERVE": "debug/elf", + "elf.SHN_LOOS": "debug/elf", + "elf.SHN_LOPROC": "debug/elf", + "elf.SHN_LORESERVE": "debug/elf", + "elf.SHN_UNDEF": "debug/elf", + "elf.SHN_XINDEX": "debug/elf", + "elf.SHT_DYNAMIC": "debug/elf", + "elf.SHT_DYNSYM": "debug/elf", + "elf.SHT_FINI_ARRAY": "debug/elf", + "elf.SHT_GNU_ATTRIBUTES": "debug/elf", + "elf.SHT_GNU_HASH": "debug/elf", + "elf.SHT_GNU_LIBLIST": "debug/elf", + "elf.SHT_GNU_VERDEF": "debug/elf", + "elf.SHT_GNU_VERNEED": "debug/elf", + "elf.SHT_GNU_VERSYM": "debug/elf", + "elf.SHT_GROUP": "debug/elf", + "elf.SHT_HASH": "debug/elf", + "elf.SHT_HIOS": "debug/elf", + "elf.SHT_HIPROC": "debug/elf", + "elf.SHT_HIUSER": "debug/elf", + "elf.SHT_INIT_ARRAY": "debug/elf", + "elf.SHT_LOOS": "debug/elf", + "elf.SHT_LOPROC": "debug/elf", + "elf.SHT_LOUSER": "debug/elf", + "elf.SHT_NOBITS": "debug/elf", + "elf.SHT_NOTE": "debug/elf", + "elf.SHT_NULL": "debug/elf", + "elf.SHT_PREINIT_ARRAY": "debug/elf", + "elf.SHT_PROGBITS": "debug/elf", + "elf.SHT_REL": "debug/elf", + "elf.SHT_RELA": "debug/elf", + "elf.SHT_SHLIB": "debug/elf", + "elf.SHT_STRTAB": "debug/elf", + "elf.SHT_SYMTAB": "debug/elf", + "elf.SHT_SYMTAB_SHNDX": "debug/elf", + "elf.STB_GLOBAL": "debug/elf", + "elf.STB_HIOS": "debug/elf", + "elf.STB_HIPROC": "debug/elf", + "elf.STB_LOCAL": "debug/elf", + "elf.STB_LOOS": "debug/elf", + "elf.STB_LOPROC": "debug/elf", + "elf.STB_WEAK": "debug/elf", + "elf.STT_COMMON": "debug/elf", + "elf.STT_FILE": "debug/elf", + "elf.STT_FUNC": "debug/elf", + "elf.STT_HIOS": "debug/elf", + "elf.STT_HIPROC": "debug/elf", + "elf.STT_LOOS": "debug/elf", + "elf.STT_LOPROC": "debug/elf", + "elf.STT_NOTYPE": "debug/elf", + "elf.STT_OBJECT": "debug/elf", + "elf.STT_SECTION": "debug/elf", + "elf.STT_TLS": "debug/elf", + "elf.STV_DEFAULT": "debug/elf", + "elf.STV_HIDDEN": "debug/elf", + "elf.STV_INTERNAL": "debug/elf", + "elf.STV_PROTECTED": "debug/elf", + "elf.ST_BIND": "debug/elf", + "elf.ST_INFO": "debug/elf", + "elf.ST_TYPE": "debug/elf", + "elf.ST_VISIBILITY": "debug/elf", + "elf.Section": "debug/elf", + "elf.Section32": "debug/elf", + "elf.Section64": "debug/elf", + "elf.SectionFlag": "debug/elf", + "elf.SectionHeader": "debug/elf", + "elf.SectionIndex": "debug/elf", + "elf.SectionType": "debug/elf", + "elf.Sym32": "debug/elf", + "elf.Sym32Size": "debug/elf", + "elf.Sym64": "debug/elf", + "elf.Sym64Size": "debug/elf", + "elf.SymBind": "debug/elf", + "elf.SymType": "debug/elf", + "elf.SymVis": "debug/elf", + "elf.Symbol": "debug/elf", + "elf.Type": "debug/elf", + "elf.Version": "debug/elf", + "elliptic.Curve": "crypto/elliptic", + "elliptic.CurveParams": "crypto/elliptic", + "elliptic.GenerateKey": "crypto/elliptic", + "elliptic.Marshal": "crypto/elliptic", + "elliptic.P224": "crypto/elliptic", + "elliptic.P256": "crypto/elliptic", + "elliptic.P384": "crypto/elliptic", + "elliptic.P521": "crypto/elliptic", + "elliptic.Unmarshal": "crypto/elliptic", + "encoding.BinaryMarshaler": "encoding", + "encoding.BinaryUnmarshaler": "encoding", + "encoding.TextMarshaler": "encoding", + "encoding.TextUnmarshaler": "encoding", + "errors.New": "errors", + "exec.Cmd": "os/exec", + "exec.Command": "os/exec", + "exec.ErrNotFound": "os/exec", + "exec.Error": "os/exec", + "exec.ExitError": "os/exec", + "exec.LookPath": "os/exec", + "expvar.Do": "expvar", + "expvar.Float": "expvar", + "expvar.Func": "expvar", + "expvar.Get": "expvar", + "expvar.Int": "expvar", + "expvar.KeyValue": "expvar", + "expvar.Map": "expvar", + "expvar.NewFloat": "expvar", + "expvar.NewInt": "expvar", + "expvar.NewMap": "expvar", + "expvar.NewString": "expvar", + "expvar.Publish": "expvar", + "expvar.String": "expvar", + "expvar.Var": "expvar", + "fcgi.Serve": "net/http/fcgi", + "filepath.Abs": "path/filepath", + "filepath.Base": "path/filepath", + "filepath.Clean": "path/filepath", + "filepath.Dir": "path/filepath", + "filepath.ErrBadPattern": "path/filepath", + "filepath.EvalSymlinks": "path/filepath", + "filepath.Ext": "path/filepath", + "filepath.FromSlash": "path/filepath", + "filepath.Glob": "path/filepath", + "filepath.HasPrefix": "path/filepath", + "filepath.IsAbs": "path/filepath", + "filepath.Join": "path/filepath", + "filepath.ListSeparator": "path/filepath", + "filepath.Match": "path/filepath", + "filepath.Rel": "path/filepath", + "filepath.Separator": "path/filepath", + "filepath.SkipDir": "path/filepath", + "filepath.Split": "path/filepath", + "filepath.SplitList": "path/filepath", + "filepath.ToSlash": "path/filepath", + "filepath.VolumeName": "path/filepath", + "filepath.Walk": "path/filepath", + "filepath.WalkFunc": "path/filepath", + "flag.Arg": "flag", + "flag.Args": "flag", + "flag.Bool": "flag", + "flag.BoolVar": "flag", + "flag.CommandLine": "flag", + "flag.ContinueOnError": "flag", + "flag.Duration": "flag", + "flag.DurationVar": "flag", + "flag.ErrHelp": "flag", + "flag.ErrorHandling": "flag", + "flag.ExitOnError": "flag", + "flag.Flag": "flag", + "flag.FlagSet": "flag", + "flag.Float64": "flag", + "flag.Float64Var": "flag", + "flag.Getter": "flag", + "flag.Int": "flag", + "flag.Int64": "flag", + "flag.Int64Var": "flag", + "flag.IntVar": "flag", + "flag.Lookup": "flag", + "flag.NArg": "flag", + "flag.NFlag": "flag", + "flag.NewFlagSet": "flag", + "flag.PanicOnError": "flag", + "flag.Parse": "flag", + "flag.Parsed": "flag", + "flag.PrintDefaults": "flag", + "flag.Set": "flag", + "flag.String": "flag", + "flag.StringVar": "flag", + "flag.Uint": "flag", + "flag.Uint64": "flag", + "flag.Uint64Var": "flag", + "flag.UintVar": "flag", + "flag.Usage": "flag", + "flag.Value": "flag", + "flag.Var": "flag", + "flag.Visit": "flag", + "flag.VisitAll": "flag", + "flate.BestCompression": "compress/flate", + "flate.BestSpeed": "compress/flate", + "flate.CorruptInputError": "compress/flate", + "flate.DefaultCompression": "compress/flate", + "flate.InternalError": "compress/flate", + "flate.NewReader": "compress/flate", + "flate.NewReaderDict": "compress/flate", + "flate.NewWriter": "compress/flate", + "flate.NewWriterDict": "compress/flate", + "flate.NoCompression": "compress/flate", + "flate.ReadError": "compress/flate", + "flate.Reader": "compress/flate", + "flate.WriteError": "compress/flate", + "flate.Writer": "compress/flate", + "fmt.Errorf": "fmt", + "fmt.Formatter": "fmt", + "fmt.Fprint": "fmt", + "fmt.Fprintf": "fmt", + "fmt.Fprintln": "fmt", + "fmt.Fscan": "fmt", + "fmt.Fscanf": "fmt", + "fmt.Fscanln": "fmt", + "fmt.GoStringer": "fmt", + "fmt.Print": "fmt", + "fmt.Printf": "fmt", + "fmt.Println": "fmt", + "fmt.Scan": "fmt", + "fmt.ScanState": "fmt", + "fmt.Scanf": "fmt", + "fmt.Scanln": "fmt", + "fmt.Scanner": "fmt", + "fmt.Sprint": "fmt", + "fmt.Sprintf": "fmt", + "fmt.Sprintln": "fmt", + "fmt.Sscan": "fmt", + "fmt.Sscanf": "fmt", + "fmt.Sscanln": "fmt", + "fmt.State": "fmt", + "fmt.Stringer": "fmt", + "fnv.New32": "hash/fnv", + "fnv.New32a": "hash/fnv", + "fnv.New64": "hash/fnv", + "fnv.New64a": "hash/fnv", + "format.Node": "go/format", + "format.Source": "go/format", + "gif.Decode": "image/gif", + "gif.DecodeAll": "image/gif", + "gif.DecodeConfig": "image/gif", + "gif.Encode": "image/gif", + "gif.EncodeAll": "image/gif", + "gif.GIF": "image/gif", + "gif.Options": "image/gif", + "gob.CommonType": "encoding/gob", + "gob.Decoder": "encoding/gob", + "gob.Encoder": "encoding/gob", + "gob.GobDecoder": "encoding/gob", + "gob.GobEncoder": "encoding/gob", + "gob.NewDecoder": "encoding/gob", + "gob.NewEncoder": "encoding/gob", + "gob.Register": "encoding/gob", + "gob.RegisterName": "encoding/gob", + "gosym.DecodingError": "debug/gosym", + "gosym.Func": "debug/gosym", + "gosym.LineTable": "debug/gosym", + "gosym.NewLineTable": "debug/gosym", + "gosym.NewTable": "debug/gosym", + "gosym.Obj": "debug/gosym", + "gosym.Sym": "debug/gosym", + "gosym.Table": "debug/gosym", + "gosym.UnknownFileError": "debug/gosym", + "gosym.UnknownLineError": "debug/gosym", + "gzip.BestCompression": "compress/gzip", + "gzip.BestSpeed": "compress/gzip", + "gzip.DefaultCompression": "compress/gzip", + "gzip.ErrChecksum": "compress/gzip", + "gzip.ErrHeader": "compress/gzip", + "gzip.Header": "compress/gzip", + "gzip.NewReader": "compress/gzip", + "gzip.NewWriter": "compress/gzip", + "gzip.NewWriterLevel": "compress/gzip", + "gzip.NoCompression": "compress/gzip", + "gzip.Reader": "compress/gzip", + "gzip.Writer": "compress/gzip", + "hash.Hash": "hash", + "hash.Hash32": "hash", + "hash.Hash64": "hash", + "heap.Fix": "container/heap", + "heap.Init": "container/heap", + "heap.Interface": "container/heap", + "heap.Pop": "container/heap", + "heap.Push": "container/heap", + "heap.Remove": "container/heap", + "hex.Decode": "encoding/hex", + "hex.DecodeString": "encoding/hex", + "hex.DecodedLen": "encoding/hex", + "hex.Dump": "encoding/hex", + "hex.Dumper": "encoding/hex", + "hex.Encode": "encoding/hex", + "hex.EncodeToString": "encoding/hex", + "hex.EncodedLen": "encoding/hex", + "hex.ErrLength": "encoding/hex", + "hex.InvalidByteError": "encoding/hex", + "hmac.Equal": "crypto/hmac", + "hmac.New": "crypto/hmac", + "html.EscapeString": "html", + "html.UnescapeString": "html", + "http.CanonicalHeaderKey": "net/http", + "http.Client": "net/http", + "http.CloseNotifier": "net/http", + "http.Cookie": "net/http", + "http.CookieJar": "net/http", + "http.DefaultClient": "net/http", + "http.DefaultMaxHeaderBytes": "net/http", + "http.DefaultMaxIdleConnsPerHost": "net/http", + "http.DefaultServeMux": "net/http", + "http.DefaultTransport": "net/http", + "http.DetectContentType": "net/http", + "http.Dir": "net/http", + "http.ErrBodyNotAllowed": "net/http", + "http.ErrBodyReadAfterClose": "net/http", + "http.ErrContentLength": "net/http", + "http.ErrHandlerTimeout": "net/http", + "http.ErrHeaderTooLong": "net/http", + "http.ErrHijacked": "net/http", + "http.ErrLineTooLong": "net/http", + "http.ErrMissingBoundary": "net/http", + "http.ErrMissingContentLength": "net/http", + "http.ErrMissingFile": "net/http", + "http.ErrNoCookie": "net/http", + "http.ErrNoLocation": "net/http", + "http.ErrNotMultipart": "net/http", + "http.ErrNotSupported": "net/http", + "http.ErrShortBody": "net/http", + "http.ErrUnexpectedTrailer": "net/http", + "http.ErrWriteAfterFlush": "net/http", + "http.Error": "net/http", + "http.File": "net/http", + "http.FileServer": "net/http", + "http.FileSystem": "net/http", + "http.Flusher": "net/http", + "http.Get": "net/http", + "http.Handle": "net/http", + "http.HandleFunc": "net/http", + "http.Handler": "net/http", + "http.HandlerFunc": "net/http", + "http.Head": "net/http", + "http.Header": "net/http", + "http.Hijacker": "net/http", + "http.ListenAndServe": "net/http", + "http.ListenAndServeTLS": "net/http", + "http.MaxBytesReader": "net/http", + "http.NewFileTransport": "net/http", + "http.NewRequest": "net/http", + "http.NewServeMux": "net/http", + "http.NotFound": "net/http", + "http.NotFoundHandler": "net/http", + "http.ParseHTTPVersion": "net/http", + "http.ParseTime": "net/http", + "http.Post": "net/http", + "http.PostForm": "net/http", + "http.ProtocolError": "net/http", + "http.ProxyFromEnvironment": "net/http", + "http.ProxyURL": "net/http", + "http.ReadRequest": "net/http", + "http.ReadResponse": "net/http", + "http.Redirect": "net/http", + "http.RedirectHandler": "net/http", + "http.Request": "net/http", + "http.Response": "net/http", + "http.ResponseWriter": "net/http", + "http.RoundTripper": "net/http", + "http.Serve": "net/http", + "http.ServeContent": "net/http", + "http.ServeFile": "net/http", + "http.ServeMux": "net/http", + "http.Server": "net/http", + "http.SetCookie": "net/http", + "http.StatusAccepted": "net/http", + "http.StatusBadGateway": "net/http", + "http.StatusBadRequest": "net/http", + "http.StatusConflict": "net/http", + "http.StatusContinue": "net/http", + "http.StatusCreated": "net/http", + "http.StatusExpectationFailed": "net/http", + "http.StatusForbidden": "net/http", + "http.StatusFound": "net/http", + "http.StatusGatewayTimeout": "net/http", + "http.StatusGone": "net/http", + "http.StatusHTTPVersionNotSupported": "net/http", + "http.StatusInternalServerError": "net/http", + "http.StatusLengthRequired": "net/http", + "http.StatusMethodNotAllowed": "net/http", + "http.StatusMovedPermanently": "net/http", + "http.StatusMultipleChoices": "net/http", + "http.StatusNoContent": "net/http", + "http.StatusNonAuthoritativeInfo": "net/http", + "http.StatusNotAcceptable": "net/http", + "http.StatusNotFound": "net/http", + "http.StatusNotImplemented": "net/http", + "http.StatusNotModified": "net/http", + "http.StatusOK": "net/http", + "http.StatusPartialContent": "net/http", + "http.StatusPaymentRequired": "net/http", + "http.StatusPreconditionFailed": "net/http", + "http.StatusProxyAuthRequired": "net/http", + "http.StatusRequestEntityTooLarge": "net/http", + "http.StatusRequestTimeout": "net/http", + "http.StatusRequestURITooLong": "net/http", + "http.StatusRequestedRangeNotSatisfiable": "net/http", + "http.StatusResetContent": "net/http", + "http.StatusSeeOther": "net/http", + "http.StatusServiceUnavailable": "net/http", + "http.StatusSwitchingProtocols": "net/http", + "http.StatusTeapot": "net/http", + "http.StatusTemporaryRedirect": "net/http", + "http.StatusText": "net/http", + "http.StatusUnauthorized": "net/http", + "http.StatusUnsupportedMediaType": "net/http", + "http.StatusUseProxy": "net/http", + "http.StripPrefix": "net/http", + "http.TimeFormat": "net/http", + "http.TimeoutHandler": "net/http", + "http.Transport": "net/http", + "httptest.DefaultRemoteAddr": "net/http/httptest", + "httptest.NewRecorder": "net/http/httptest", + "httptest.NewServer": "net/http/httptest", + "httptest.NewTLSServer": "net/http/httptest", + "httptest.NewUnstartedServer": "net/http/httptest", + "httptest.ResponseRecorder": "net/http/httptest", + "httptest.Server": "net/http/httptest", + "httputil.ClientConn": "net/http/httputil", + "httputil.DumpRequest": "net/http/httputil", + "httputil.DumpRequestOut": "net/http/httputil", + "httputil.DumpResponse": "net/http/httputil", + "httputil.ErrClosed": "net/http/httputil", + "httputil.ErrLineTooLong": "net/http/httputil", + "httputil.ErrPersistEOF": "net/http/httputil", + "httputil.ErrPipeline": "net/http/httputil", + "httputil.NewChunkedReader": "net/http/httputil", + "httputil.NewChunkedWriter": "net/http/httputil", + "httputil.NewClientConn": "net/http/httputil", + "httputil.NewProxyClientConn": "net/http/httputil", + "httputil.NewServerConn": "net/http/httputil", + "httputil.NewSingleHostReverseProxy": "net/http/httputil", + "httputil.ReverseProxy": "net/http/httputil", + "httputil.ServerConn": "net/http/httputil", + "image.Alpha": "image", + "image.Alpha16": "image", + "image.Black": "image", + "image.Config": "image", + "image.Decode": "image", + "image.DecodeConfig": "image", + "image.ErrFormat": "image", + "image.Gray": "image", + "image.Gray16": "image", + "image.Image": "image", + "image.NRGBA": "image", + "image.NRGBA64": "image", + "image.NewAlpha": "image", + "image.NewAlpha16": "image", + "image.NewGray": "image", + "image.NewGray16": "image", + "image.NewNRGBA": "image", + "image.NewNRGBA64": "image", + "image.NewPaletted": "image", + "image.NewRGBA": "image", + "image.NewRGBA64": "image", + "image.NewUniform": "image", + "image.NewYCbCr": "image", + "image.Opaque": "image", + "image.Paletted": "image", + "image.PalettedImage": "image", + "image.Point": "image", + "image.Pt": "image", + "image.RGBA": "image", + "image.RGBA64": "image", + "image.Rect": "image", + "image.Rectangle": "image", + "image.RegisterFormat": "image", + "image.Transparent": "image", + "image.Uniform": "image", + "image.White": "image", + "image.YCbCr": "image", + "image.YCbCrSubsampleRatio": "image", + "image.YCbCrSubsampleRatio420": "image", + "image.YCbCrSubsampleRatio422": "image", + "image.YCbCrSubsampleRatio440": "image", + "image.YCbCrSubsampleRatio444": "image", + "image.ZP": "image", + "image.ZR": "image", + "io.ByteReader": "io", + "io.ByteScanner": "io", + "io.ByteWriter": "io", + "io.Closer": "io", + "io.Copy": "io", + "io.CopyN": "io", + "io.EOF": "io", + "io.ErrClosedPipe": "io", + "io.ErrNoProgress": "io", + "io.ErrShortBuffer": "io", + "io.ErrShortWrite": "io", + "io.ErrUnexpectedEOF": "io", + "io.LimitReader": "io", + "io.LimitedReader": "io", + "io.MultiReader": "io", + "io.MultiWriter": "io", + "io.NewSectionReader": "io", + "io.Pipe": "io", + "io.PipeReader": "io", + "io.PipeWriter": "io", + "io.ReadAtLeast": "io", + "io.ReadCloser": "io", + "io.ReadFull": "io", + "io.ReadSeeker": "io", + "io.ReadWriteCloser": "io", + "io.ReadWriteSeeker": "io", + "io.ReadWriter": "io", + "io.Reader": "io", + "io.ReaderAt": "io", + "io.ReaderFrom": "io", + "io.RuneReader": "io", + "io.RuneScanner": "io", + "io.SectionReader": "io", + "io.Seeker": "io", + "io.TeeReader": "io", + "io.WriteCloser": "io", + "io.WriteSeeker": "io", + "io.WriteString": "io", + "io.Writer": "io", + "io.WriterAt": "io", + "io.WriterTo": "io", + "iotest.DataErrReader": "testing/iotest", + "iotest.ErrTimeout": "testing/iotest", + "iotest.HalfReader": "testing/iotest", + "iotest.NewReadLogger": "testing/iotest", + "iotest.NewWriteLogger": "testing/iotest", + "iotest.OneByteReader": "testing/iotest", + "iotest.TimeoutReader": "testing/iotest", + "iotest.TruncateWriter": "testing/iotest", + "ioutil.Discard": "io/ioutil", + "ioutil.NopCloser": "io/ioutil", + "ioutil.ReadAll": "io/ioutil", + "ioutil.ReadDir": "io/ioutil", + "ioutil.ReadFile": "io/ioutil", + "ioutil.TempDir": "io/ioutil", + "ioutil.TempFile": "io/ioutil", + "ioutil.WriteFile": "io/ioutil", + "jpeg.Decode": "image/jpeg", + "jpeg.DecodeConfig": "image/jpeg", + "jpeg.DefaultQuality": "image/jpeg", + "jpeg.Encode": "image/jpeg", + "jpeg.FormatError": "image/jpeg", + "jpeg.Options": "image/jpeg", + "jpeg.Reader": "image/jpeg", + "jpeg.UnsupportedError": "image/jpeg", + "json.Compact": "encoding/json", + "json.Decoder": "encoding/json", + "json.Encoder": "encoding/json", + "json.HTMLEscape": "encoding/json", + "json.Indent": "encoding/json", + "json.InvalidUTF8Error": "encoding/json", + "json.InvalidUnmarshalError": "encoding/json", + "json.Marshal": "encoding/json", + "json.MarshalIndent": "encoding/json", + "json.Marshaler": "encoding/json", + "json.MarshalerError": "encoding/json", + "json.NewDecoder": "encoding/json", + "json.NewEncoder": "encoding/json", + "json.Number": "encoding/json", + "json.RawMessage": "encoding/json", + "json.SyntaxError": "encoding/json", + "json.Unmarshal": "encoding/json", + "json.UnmarshalFieldError": "encoding/json", + "json.UnmarshalTypeError": "encoding/json", + "json.Unmarshaler": "encoding/json", + "json.UnsupportedTypeError": "encoding/json", + "json.UnsupportedValueError": "encoding/json", + "jsonrpc.Dial": "net/rpc/jsonrpc", + "jsonrpc.NewClient": "net/rpc/jsonrpc", + "jsonrpc.NewClientCodec": "net/rpc/jsonrpc", + "jsonrpc.NewServerCodec": "net/rpc/jsonrpc", + "jsonrpc.ServeConn": "net/rpc/jsonrpc", + "list.Element": "container/list", + "list.List": "container/list", + "list.New": "container/list", + "log.Fatal": "log", + "log.Fatalf": "log", + "log.Fatalln": "log", + "log.Flags": "log", + "log.Ldate": "log", + "log.Llongfile": "log", + "log.Lmicroseconds": "log", + "log.Logger": "log", + "log.Lshortfile": "log", + "log.LstdFlags": "log", + "log.Ltime": "log", + "log.New": "log", + "log.Panic": "log", + "log.Panicf": "log", + "log.Panicln": "log", + "log.Prefix": "log", + "log.Print": "log", + "log.Printf": "log", + "log.Println": "log", + "log.SetFlags": "log", + "log.SetOutput": "log", + "log.SetPrefix": "log", + "lzw.LSB": "compress/lzw", + "lzw.MSB": "compress/lzw", + "lzw.NewReader": "compress/lzw", + "lzw.NewWriter": "compress/lzw", + "lzw.Order": "compress/lzw", + "macho.Cpu": "debug/macho", + "macho.Cpu386": "debug/macho", + "macho.CpuAmd64": "debug/macho", + "macho.Dylib": "debug/macho", + "macho.DylibCmd": "debug/macho", + "macho.Dysymtab": "debug/macho", + "macho.DysymtabCmd": "debug/macho", + "macho.File": "debug/macho", + "macho.FileHeader": "debug/macho", + "macho.FormatError": "debug/macho", + "macho.Load": "debug/macho", + "macho.LoadBytes": "debug/macho", + "macho.LoadCmd": "debug/macho", + "macho.LoadCmdDylib": "debug/macho", + "macho.LoadCmdDylinker": "debug/macho", + "macho.LoadCmdDysymtab": "debug/macho", + "macho.LoadCmdSegment": "debug/macho", + "macho.LoadCmdSegment64": "debug/macho", + "macho.LoadCmdSymtab": "debug/macho", + "macho.LoadCmdThread": "debug/macho", + "macho.LoadCmdUnixThread": "debug/macho", + "macho.Magic32": "debug/macho", + "macho.Magic64": "debug/macho", + "macho.NewFile": "debug/macho", + "macho.Nlist32": "debug/macho", + "macho.Nlist64": "debug/macho", + "macho.Open": "debug/macho", + "macho.Regs386": "debug/macho", + "macho.RegsAMD64": "debug/macho", + "macho.Section": "debug/macho", + "macho.Section32": "debug/macho", + "macho.Section64": "debug/macho", + "macho.SectionHeader": "debug/macho", + "macho.Segment": "debug/macho", + "macho.Segment32": "debug/macho", + "macho.Segment64": "debug/macho", + "macho.SegmentHeader": "debug/macho", + "macho.Symbol": "debug/macho", + "macho.Symtab": "debug/macho", + "macho.SymtabCmd": "debug/macho", + "macho.Thread": "debug/macho", + "macho.Type": "debug/macho", + "macho.TypeExec": "debug/macho", + "macho.TypeObj": "debug/macho", + "mail.Address": "net/mail", + "mail.ErrHeaderNotPresent": "net/mail", + "mail.Header": "net/mail", + "mail.Message": "net/mail", + "mail.ParseAddress": "net/mail", + "mail.ParseAddressList": "net/mail", + "mail.ReadMessage": "net/mail", + "math.Abs": "math", + "math.Acos": "math", + "math.Acosh": "math", + "math.Asin": "math", + "math.Asinh": "math", + "math.Atan": "math", + "math.Atan2": "math", + "math.Atanh": "math", + "math.Cbrt": "math", + "math.Ceil": "math", + "math.Copysign": "math", + "math.Cos": "math", + "math.Cosh": "math", + "math.Dim": "math", + "math.E": "math", + "math.Erf": "math", + "math.Erfc": "math", + "math.Exp": "math", + "math.Exp2": "math", + "math.Expm1": "math", + "math.Float32bits": "math", + "math.Float32frombits": "math", + "math.Float64bits": "math", + "math.Float64frombits": "math", + "math.Floor": "math", + "math.Frexp": "math", + "math.Gamma": "math", + "math.Hypot": "math", + "math.Ilogb": "math", + "math.Inf": "math", + "math.IsInf": "math", + "math.IsNaN": "math", + "math.J0": "math", + "math.J1": "math", + "math.Jn": "math", + "math.Ldexp": "math", + "math.Lgamma": "math", + "math.Ln10": "math", + "math.Ln2": "math", + "math.Log": "math", + "math.Log10": "math", + "math.Log10E": "math", + "math.Log1p": "math", + "math.Log2": "math", + "math.Log2E": "math", + "math.Logb": "math", + "math.Max": "math", + "math.MaxFloat32": "math", + "math.MaxFloat64": "math", + "math.MaxInt16": "math", + "math.MaxInt32": "math", + "math.MaxInt64": "math", + "math.MaxInt8": "math", + "math.MaxUint16": "math", + "math.MaxUint32": "math", + "math.MaxUint64": "math", + "math.MaxUint8": "math", + "math.Min": "math", + "math.MinInt16": "math", + "math.MinInt32": "math", + "math.MinInt64": "math", + "math.MinInt8": "math", + "math.Mod": "math", + "math.Modf": "math", + "math.NaN": "math", + "math.Nextafter": "math", + "math.Phi": "math", + "math.Pi": "math", + "math.Pow": "math", + "math.Pow10": "math", + "math.Remainder": "math", + "math.Signbit": "math", + "math.Sin": "math", + "math.Sincos": "math", + "math.Sinh": "math", + "math.SmallestNonzeroFloat32": "math", + "math.SmallestNonzeroFloat64": "math", + "math.Sqrt": "math", + "math.Sqrt2": "math", + "math.SqrtE": "math", + "math.SqrtPhi": "math", + "math.SqrtPi": "math", + "math.Tan": "math", + "math.Tanh": "math", + "math.Trunc": "math", + "math.Y0": "math", + "math.Y1": "math", + "math.Yn": "math", + "md5.BlockSize": "crypto/md5", + "md5.New": "crypto/md5", + "md5.Size": "crypto/md5", + "md5.Sum": "crypto/md5", + "mime.AddExtensionType": "mime", + "mime.FormatMediaType": "mime", + "mime.ParseMediaType": "mime", + "mime.TypeByExtension": "mime", + "multipart.File": "mime/multipart", + "multipart.FileHeader": "mime/multipart", + "multipart.Form": "mime/multipart", + "multipart.NewReader": "mime/multipart", + "multipart.NewWriter": "mime/multipart", + "multipart.Part": "mime/multipart", + "multipart.Reader": "mime/multipart", + "multipart.Writer": "mime/multipart", + "net.Addr": "net", + "net.AddrError": "net", + "net.CIDRMask": "net", + "net.Conn": "net", + "net.DNSConfigError": "net", + "net.DNSError": "net", + "net.Dial": "net", + "net.DialIP": "net", + "net.DialTCP": "net", + "net.DialTimeout": "net", + "net.DialUDP": "net", + "net.DialUnix": "net", + "net.Dialer": "net", + "net.ErrWriteToConnected": "net", + "net.Error": "net", + "net.FileConn": "net", + "net.FileListener": "net", + "net.FilePacketConn": "net", + "net.FlagBroadcast": "net", + "net.FlagLoopback": "net", + "net.FlagMulticast": "net", + "net.FlagPointToPoint": "net", + "net.FlagUp": "net", + "net.Flags": "net", + "net.HardwareAddr": "net", + "net.IP": "net", + "net.IPAddr": "net", + "net.IPConn": "net", + "net.IPMask": "net", + "net.IPNet": "net", + "net.IPv4": "net", + "net.IPv4Mask": "net", + "net.IPv4allrouter": "net", + "net.IPv4allsys": "net", + "net.IPv4bcast": "net", + "net.IPv4len": "net", + "net.IPv4zero": "net", + "net.IPv6interfacelocalallnodes": "net", + "net.IPv6len": "net", + "net.IPv6linklocalallnodes": "net", + "net.IPv6linklocalallrouters": "net", + "net.IPv6loopback": "net", + "net.IPv6unspecified": "net", + "net.IPv6zero": "net", + "net.Interface": "net", + "net.InterfaceAddrs": "net", + "net.InterfaceByIndex": "net", + "net.InterfaceByName": "net", + "net.Interfaces": "net", + "net.InvalidAddrError": "net", + "net.JoinHostPort": "net", + "net.Listen": "net", + "net.ListenIP": "net", + "net.ListenMulticastUDP": "net", + "net.ListenPacket": "net", + "net.ListenTCP": "net", + "net.ListenUDP": "net", + "net.ListenUnix": "net", + "net.ListenUnixgram": "net", + "net.Listener": "net", + "net.LookupAddr": "net", + "net.LookupCNAME": "net", + "net.LookupHost": "net", + "net.LookupIP": "net", + "net.LookupMX": "net", + "net.LookupNS": "net", + "net.LookupPort": "net", + "net.LookupSRV": "net", + "net.LookupTXT": "net", + "net.MX": "net", + "net.NS": "net", + "net.OpError": "net", + "net.PacketConn": "net", + "net.ParseCIDR": "net", + "net.ParseError": "net", + "net.ParseIP": "net", + "net.ParseMAC": "net", + "net.Pipe": "net", + "net.ResolveIPAddr": "net", + "net.ResolveTCPAddr": "net", + "net.ResolveUDPAddr": "net", + "net.ResolveUnixAddr": "net", + "net.SRV": "net", + "net.SplitHostPort": "net", + "net.TCPAddr": "net", + "net.TCPConn": "net", + "net.TCPListener": "net", + "net.UDPAddr": "net", + "net.UDPConn": "net", + "net.UnixAddr": "net", + "net.UnixConn": "net", + "net.UnixListener": "net", + "net.UnknownNetworkError": "net", + "os.Args": "os", + "os.Chdir": "os", + "os.Chmod": "os", + "os.Chown": "os", + "os.Chtimes": "os", + "os.Clearenv": "os", + "os.Create": "os", + "os.DevNull": "os", + "os.Environ": "os", + "os.ErrExist": "os", + "os.ErrInvalid": "os", + "os.ErrNotExist": "os", + "os.ErrPermission": "os", + "os.Exit": "os", + "os.Expand": "os", + "os.ExpandEnv": "os", + "os.File": "os", + "os.FileInfo": "os", + "os.FileMode": "os", + "os.FindProcess": "os", + "os.Getegid": "os", + "os.Getenv": "os", + "os.Geteuid": "os", + "os.Getgid": "os", + "os.Getgroups": "os", + "os.Getpagesize": "os", + "os.Getpid": "os", + "os.Getppid": "os", + "os.Getuid": "os", + "os.Getwd": "os", + "os.Hostname": "os", + "os.Interrupt": "os", + "os.IsExist": "os", + "os.IsNotExist": "os", + "os.IsPathSeparator": "os", + "os.IsPermission": "os", + "os.Kill": "os", + "os.Lchown": "os", + "os.Link": "os", + "os.LinkError": "os", + "os.Lstat": "os", + "os.Mkdir": "os", + "os.MkdirAll": "os", + "os.ModeAppend": "os", + "os.ModeCharDevice": "os", + "os.ModeDevice": "os", + "os.ModeDir": "os", + "os.ModeExclusive": "os", + "os.ModeNamedPipe": "os", + "os.ModePerm": "os", + "os.ModeSetgid": "os", + "os.ModeSetuid": "os", + "os.ModeSocket": "os", + "os.ModeSticky": "os", + "os.ModeSymlink": "os", + "os.ModeTemporary": "os", + "os.ModeType": "os", + "os.NewFile": "os", + "os.NewSyscallError": "os", + "os.O_APPEND": "os", + "os.O_CREATE": "os", + "os.O_EXCL": "os", + "os.O_RDONLY": "os", + "os.O_RDWR": "os", + "os.O_SYNC": "os", + "os.O_TRUNC": "os", + "os.O_WRONLY": "os", + "os.Open": "os", + "os.OpenFile": "os", + "os.PathError": "os", + "os.PathListSeparator": "os", + "os.PathSeparator": "os", + "os.Pipe": "os", + "os.ProcAttr": "os", + "os.Process": "os", + "os.ProcessState": "os", + "os.Readlink": "os", + "os.Remove": "os", + "os.RemoveAll": "os", + "os.Rename": "os", + "os.SEEK_CUR": "os", + "os.SEEK_END": "os", + "os.SEEK_SET": "os", + "os.SameFile": "os", + "os.Setenv": "os", + "os.Signal": "os", + "os.StartProcess": "os", + "os.Stat": "os", + "os.Stderr": "os", + "os.Stdin": "os", + "os.Stdout": "os", + "os.Symlink": "os", + "os.SyscallError": "os", + "os.TempDir": "os", + "os.Truncate": "os", + "palette.Plan9": "image/color/palette", + "palette.WebSafe": "image/color/palette", + "parse.ActionNode": "text/template/parse", + "parse.BoolNode": "text/template/parse", + "parse.BranchNode": "text/template/parse", + "parse.ChainNode": "text/template/parse", + "parse.CommandNode": "text/template/parse", + "parse.DotNode": "text/template/parse", + "parse.FieldNode": "text/template/parse", + "parse.IdentifierNode": "text/template/parse", + "parse.IfNode": "text/template/parse", + "parse.IsEmptyTree": "text/template/parse", + "parse.ListNode": "text/template/parse", + "parse.New": "text/template/parse", + "parse.NewIdentifier": "text/template/parse", + "parse.NilNode": "text/template/parse", + "parse.Node": "text/template/parse", + "parse.NodeAction": "text/template/parse", + "parse.NodeBool": "text/template/parse", + "parse.NodeChain": "text/template/parse", + "parse.NodeCommand": "text/template/parse", + "parse.NodeDot": "text/template/parse", + "parse.NodeField": "text/template/parse", + "parse.NodeIdentifier": "text/template/parse", + "parse.NodeIf": "text/template/parse", + "parse.NodeList": "text/template/parse", + "parse.NodeNil": "text/template/parse", + "parse.NodeNumber": "text/template/parse", + "parse.NodePipe": "text/template/parse", + "parse.NodeRange": "text/template/parse", + "parse.NodeString": "text/template/parse", + "parse.NodeTemplate": "text/template/parse", + "parse.NodeText": "text/template/parse", + "parse.NodeType": "text/template/parse", + "parse.NodeVariable": "text/template/parse", + "parse.NodeWith": "text/template/parse", + "parse.NumberNode": "text/template/parse", + "parse.Parse": "text/template/parse", + "parse.PipeNode": "text/template/parse", + "parse.Pos": "text/template/parse", + "parse.RangeNode": "text/template/parse", + "parse.StringNode": "text/template/parse", + "parse.TemplateNode": "text/template/parse", + "parse.TextNode": "text/template/parse", + "parse.Tree": "text/template/parse", + "parse.VariableNode": "text/template/parse", + "parse.WithNode": "text/template/parse", + "parser.AllErrors": "go/parser", + "parser.DeclarationErrors": "go/parser", + "parser.ImportsOnly": "go/parser", + "parser.Mode": "go/parser", + "parser.PackageClauseOnly": "go/parser", + "parser.ParseComments": "go/parser", + "parser.ParseDir": "go/parser", + "parser.ParseExpr": "go/parser", + "parser.ParseFile": "go/parser", + "parser.SpuriousErrors": "go/parser", + "parser.Trace": "go/parser", + "path.Base": "path", + "path.Clean": "path", + "path.Dir": "path", + "path.ErrBadPattern": "path", + "path.Ext": "path", + "path.IsAbs": "path", + "path.Join": "path", + "path.Match": "path", + "path.Split": "path", + "pe.COFFSymbol": "debug/pe", + "pe.COFFSymbolSize": "debug/pe", + "pe.File": "debug/pe", + "pe.FileHeader": "debug/pe", + "pe.FormatError": "debug/pe", + "pe.IMAGE_FILE_MACHINE_AM33": "debug/pe", + "pe.IMAGE_FILE_MACHINE_AMD64": "debug/pe", + "pe.IMAGE_FILE_MACHINE_ARM": "debug/pe", + "pe.IMAGE_FILE_MACHINE_EBC": "debug/pe", + "pe.IMAGE_FILE_MACHINE_I386": "debug/pe", + "pe.IMAGE_FILE_MACHINE_IA64": "debug/pe", + "pe.IMAGE_FILE_MACHINE_M32R": "debug/pe", + "pe.IMAGE_FILE_MACHINE_MIPS16": "debug/pe", + "pe.IMAGE_FILE_MACHINE_MIPSFPU": "debug/pe", + "pe.IMAGE_FILE_MACHINE_MIPSFPU16": "debug/pe", + "pe.IMAGE_FILE_MACHINE_POWERPC": "debug/pe", + "pe.IMAGE_FILE_MACHINE_POWERPCFP": "debug/pe", + "pe.IMAGE_FILE_MACHINE_R4000": "debug/pe", + "pe.IMAGE_FILE_MACHINE_SH3": "debug/pe", + "pe.IMAGE_FILE_MACHINE_SH3DSP": "debug/pe", + "pe.IMAGE_FILE_MACHINE_SH4": "debug/pe", + "pe.IMAGE_FILE_MACHINE_SH5": "debug/pe", + "pe.IMAGE_FILE_MACHINE_THUMB": "debug/pe", + "pe.IMAGE_FILE_MACHINE_UNKNOWN": "debug/pe", + "pe.IMAGE_FILE_MACHINE_WCEMIPSV2": "debug/pe", + "pe.ImportDirectory": "debug/pe", + "pe.NewFile": "debug/pe", + "pe.Open": "debug/pe", + "pe.Section": "debug/pe", + "pe.SectionHeader": "debug/pe", + "pe.SectionHeader32": "debug/pe", + "pe.Symbol": "debug/pe", + "pem.Block": "encoding/pem", + "pem.Decode": "encoding/pem", + "pem.Encode": "encoding/pem", + "pem.EncodeToMemory": "encoding/pem", + "pkix.AlgorithmIdentifier": "crypto/x509/pkix", + "pkix.AttributeTypeAndValue": "crypto/x509/pkix", + "pkix.CertificateList": "crypto/x509/pkix", + "pkix.Extension": "crypto/x509/pkix", + "pkix.Name": "crypto/x509/pkix", + "pkix.RDNSequence": "crypto/x509/pkix", + "pkix.RelativeDistinguishedNameSET": "crypto/x509/pkix", + "pkix.RevokedCertificate": "crypto/x509/pkix", + "pkix.TBSCertificateList": "crypto/x509/pkix", + "png.Decode": "image/png", + "png.DecodeConfig": "image/png", + "png.Encode": "image/png", + "png.FormatError": "image/png", + "png.UnsupportedError": "image/png", + "pprof.Cmdline": "net/http/pprof", + "pprof.Handler": "net/http/pprof", + "pprof.Index": "net/http/pprof", + "pprof.Lookup": "runtime/pprof", + "pprof.NewProfile": "runtime/pprof", + // "pprof.Profile" is ambiguous + "pprof.Profiles": "runtime/pprof", + "pprof.StartCPUProfile": "runtime/pprof", + "pprof.StopCPUProfile": "runtime/pprof", + "pprof.Symbol": "net/http/pprof", + "pprof.WriteHeapProfile": "runtime/pprof", + "printer.CommentedNode": "go/printer", + "printer.Config": "go/printer", + "printer.Fprint": "go/printer", + "printer.Mode": "go/printer", + "printer.RawFormat": "go/printer", + "printer.SourcePos": "go/printer", + "printer.TabIndent": "go/printer", + "printer.UseSpaces": "go/printer", + "quick.Check": "testing/quick", + "quick.CheckEqual": "testing/quick", + "quick.CheckEqualError": "testing/quick", + "quick.CheckError": "testing/quick", + "quick.Config": "testing/quick", + "quick.Generator": "testing/quick", + "quick.SetupError": "testing/quick", + "quick.Value": "testing/quick", + "rand.ExpFloat64": "math/rand", + "rand.Float32": "math/rand", + "rand.Float64": "math/rand", + // "rand.Int" is ambiguous + "rand.Int31": "math/rand", + "rand.Int31n": "math/rand", + "rand.Int63": "math/rand", + "rand.Int63n": "math/rand", + "rand.Intn": "math/rand", + "rand.New": "math/rand", + "rand.NewSource": "math/rand", + "rand.NewZipf": "math/rand", + "rand.NormFloat64": "math/rand", + "rand.Perm": "math/rand", + "rand.Prime": "crypto/rand", + "rand.Rand": "math/rand", + "rand.Read": "crypto/rand", + "rand.Reader": "crypto/rand", + "rand.Seed": "math/rand", + "rand.Source": "math/rand", + "rand.Uint32": "math/rand", + "rand.Zipf": "math/rand", + "rc4.Cipher": "crypto/rc4", + "rc4.KeySizeError": "crypto/rc4", + "rc4.NewCipher": "crypto/rc4", + "reflect.Append": "reflect", + "reflect.AppendSlice": "reflect", + "reflect.Array": "reflect", + "reflect.Bool": "reflect", + "reflect.BothDir": "reflect", + "reflect.Chan": "reflect", + "reflect.ChanDir": "reflect", + "reflect.ChanOf": "reflect", + "reflect.Complex128": "reflect", + "reflect.Complex64": "reflect", + "reflect.Copy": "reflect", + "reflect.DeepEqual": "reflect", + "reflect.Float32": "reflect", + "reflect.Float64": "reflect", + "reflect.Func": "reflect", + "reflect.Indirect": "reflect", + "reflect.Int": "reflect", + "reflect.Int16": "reflect", + "reflect.Int32": "reflect", + "reflect.Int64": "reflect", + "reflect.Int8": "reflect", + "reflect.Interface": "reflect", + "reflect.Invalid": "reflect", + "reflect.Kind": "reflect", + "reflect.MakeChan": "reflect", + "reflect.MakeFunc": "reflect", + "reflect.MakeMap": "reflect", + "reflect.MakeSlice": "reflect", + "reflect.Map": "reflect", + "reflect.MapOf": "reflect", + "reflect.Method": "reflect", + "reflect.New": "reflect", + "reflect.NewAt": "reflect", + "reflect.Ptr": "reflect", + "reflect.PtrTo": "reflect", + "reflect.RecvDir": "reflect", + "reflect.Select": "reflect", + "reflect.SelectCase": "reflect", + "reflect.SelectDefault": "reflect", + "reflect.SelectDir": "reflect", + "reflect.SelectRecv": "reflect", + "reflect.SelectSend": "reflect", + "reflect.SendDir": "reflect", + "reflect.Slice": "reflect", + "reflect.SliceHeader": "reflect", + "reflect.SliceOf": "reflect", + "reflect.String": "reflect", + "reflect.StringHeader": "reflect", + "reflect.Struct": "reflect", + "reflect.StructField": "reflect", + "reflect.StructTag": "reflect", + "reflect.TypeOf": "reflect", + "reflect.Uint": "reflect", + "reflect.Uint16": "reflect", + "reflect.Uint32": "reflect", + "reflect.Uint64": "reflect", + "reflect.Uint8": "reflect", + "reflect.Uintptr": "reflect", + "reflect.UnsafePointer": "reflect", + "reflect.Value": "reflect", + "reflect.ValueError": "reflect", + "reflect.ValueOf": "reflect", + "reflect.Zero": "reflect", + "regexp.Compile": "regexp", + "regexp.CompilePOSIX": "regexp", + "regexp.Match": "regexp", + "regexp.MatchReader": "regexp", + "regexp.MatchString": "regexp", + "regexp.MustCompile": "regexp", + "regexp.MustCompilePOSIX": "regexp", + "regexp.QuoteMeta": "regexp", + "regexp.Regexp": "regexp", + "ring.New": "container/ring", + "ring.Ring": "container/ring", + "rpc.Accept": "net/rpc", + "rpc.Call": "net/rpc", + "rpc.Client": "net/rpc", + "rpc.ClientCodec": "net/rpc", + "rpc.DefaultDebugPath": "net/rpc", + "rpc.DefaultRPCPath": "net/rpc", + "rpc.DefaultServer": "net/rpc", + "rpc.Dial": "net/rpc", + "rpc.DialHTTP": "net/rpc", + "rpc.DialHTTPPath": "net/rpc", + "rpc.ErrShutdown": "net/rpc", + "rpc.HandleHTTP": "net/rpc", + "rpc.NewClient": "net/rpc", + "rpc.NewClientWithCodec": "net/rpc", + "rpc.NewServer": "net/rpc", + "rpc.Register": "net/rpc", + "rpc.RegisterName": "net/rpc", + "rpc.Request": "net/rpc", + "rpc.Response": "net/rpc", + "rpc.ServeCodec": "net/rpc", + "rpc.ServeConn": "net/rpc", + "rpc.ServeRequest": "net/rpc", + "rpc.Server": "net/rpc", + "rpc.ServerCodec": "net/rpc", + "rpc.ServerError": "net/rpc", + "rsa.CRTValue": "crypto/rsa", + "rsa.DecryptOAEP": "crypto/rsa", + "rsa.DecryptPKCS1v15": "crypto/rsa", + "rsa.DecryptPKCS1v15SessionKey": "crypto/rsa", + "rsa.EncryptOAEP": "crypto/rsa", + "rsa.EncryptPKCS1v15": "crypto/rsa", + "rsa.ErrDecryption": "crypto/rsa", + "rsa.ErrMessageTooLong": "crypto/rsa", + "rsa.ErrVerification": "crypto/rsa", + "rsa.GenerateKey": "crypto/rsa", + "rsa.GenerateMultiPrimeKey": "crypto/rsa", + "rsa.PSSOptions": "crypto/rsa", + "rsa.PSSSaltLengthAuto": "crypto/rsa", + "rsa.PSSSaltLengthEqualsHash": "crypto/rsa", + "rsa.PrecomputedValues": "crypto/rsa", + "rsa.PrivateKey": "crypto/rsa", + "rsa.PublicKey": "crypto/rsa", + "rsa.SignPKCS1v15": "crypto/rsa", + "rsa.SignPSS": "crypto/rsa", + "rsa.VerifyPKCS1v15": "crypto/rsa", + "rsa.VerifyPSS": "crypto/rsa", + "runtime.BlockProfile": "runtime", + "runtime.BlockProfileRecord": "runtime", + "runtime.Breakpoint": "runtime", + "runtime.CPUProfile": "runtime", + "runtime.Caller": "runtime", + "runtime.Callers": "runtime", + "runtime.Compiler": "runtime", + "runtime.Error": "runtime", + "runtime.Func": "runtime", + "runtime.FuncForPC": "runtime", + "runtime.GC": "runtime", + "runtime.GOARCH": "runtime", + "runtime.GOMAXPROCS": "runtime", + "runtime.GOOS": "runtime", + "runtime.GOROOT": "runtime", + "runtime.Goexit": "runtime", + "runtime.GoroutineProfile": "runtime", + "runtime.Gosched": "runtime", + "runtime.LockOSThread": "runtime", + "runtime.MemProfile": "runtime", + "runtime.MemProfileRate": "runtime", + "runtime.MemProfileRecord": "runtime", + "runtime.MemStats": "runtime", + "runtime.NumCPU": "runtime", + "runtime.NumCgoCall": "runtime", + "runtime.NumGoroutine": "runtime", + "runtime.ReadMemStats": "runtime", + "runtime.SetBlockProfileRate": "runtime", + "runtime.SetCPUProfileRate": "runtime", + "runtime.SetFinalizer": "runtime", + "runtime.Stack": "runtime", + "runtime.StackRecord": "runtime", + "runtime.ThreadCreateProfile": "runtime", + "runtime.TypeAssertionError": "runtime", + "runtime.UnlockOSThread": "runtime", + "runtime.Version": "runtime", + "scanner.Char": "text/scanner", + "scanner.Comment": "text/scanner", + "scanner.EOF": "text/scanner", + "scanner.Error": "go/scanner", + "scanner.ErrorHandler": "go/scanner", + "scanner.ErrorList": "go/scanner", + "scanner.Float": "text/scanner", + "scanner.GoTokens": "text/scanner", + "scanner.GoWhitespace": "text/scanner", + "scanner.Ident": "text/scanner", + "scanner.Int": "text/scanner", + "scanner.Mode": "go/scanner", + "scanner.Position": "text/scanner", + "scanner.PrintError": "go/scanner", + "scanner.RawString": "text/scanner", + "scanner.ScanChars": "text/scanner", + // "scanner.ScanComments" is ambiguous + "scanner.ScanFloats": "text/scanner", + "scanner.ScanIdents": "text/scanner", + "scanner.ScanInts": "text/scanner", + "scanner.ScanRawStrings": "text/scanner", + "scanner.ScanStrings": "text/scanner", + // "scanner.Scanner" is ambiguous + "scanner.SkipComments": "text/scanner", + "scanner.String": "text/scanner", + "scanner.TokenString": "text/scanner", + "sha1.BlockSize": "crypto/sha1", + "sha1.New": "crypto/sha1", + "sha1.Size": "crypto/sha1", + "sha1.Sum": "crypto/sha1", + "sha256.BlockSize": "crypto/sha256", + "sha256.New": "crypto/sha256", + "sha256.New224": "crypto/sha256", + "sha256.Size": "crypto/sha256", + "sha256.Size224": "crypto/sha256", + "sha256.Sum224": "crypto/sha256", + "sha256.Sum256": "crypto/sha256", + "sha512.BlockSize": "crypto/sha512", + "sha512.New": "crypto/sha512", + "sha512.New384": "crypto/sha512", + "sha512.Size": "crypto/sha512", + "sha512.Size384": "crypto/sha512", + "sha512.Sum384": "crypto/sha512", + "sha512.Sum512": "crypto/sha512", + "signal.Notify": "os/signal", + "signal.Stop": "os/signal", + "smtp.Auth": "net/smtp", + "smtp.CRAMMD5Auth": "net/smtp", + "smtp.Client": "net/smtp", + "smtp.Dial": "net/smtp", + "smtp.NewClient": "net/smtp", + "smtp.PlainAuth": "net/smtp", + "smtp.SendMail": "net/smtp", + "smtp.ServerInfo": "net/smtp", + "sort.Float64Slice": "sort", + "sort.Float64s": "sort", + "sort.Float64sAreSorted": "sort", + "sort.IntSlice": "sort", + "sort.Interface": "sort", + "sort.Ints": "sort", + "sort.IntsAreSorted": "sort", + "sort.IsSorted": "sort", + "sort.Reverse": "sort", + "sort.Search": "sort", + "sort.SearchFloat64s": "sort", + "sort.SearchInts": "sort", + "sort.SearchStrings": "sort", + "sort.Sort": "sort", + "sort.Stable": "sort", + "sort.StringSlice": "sort", + "sort.Strings": "sort", + "sort.StringsAreSorted": "sort", + "sql.DB": "database/sql", + "sql.ErrNoRows": "database/sql", + "sql.ErrTxDone": "database/sql", + "sql.NullBool": "database/sql", + "sql.NullFloat64": "database/sql", + "sql.NullInt64": "database/sql", + "sql.NullString": "database/sql", + "sql.Open": "database/sql", + "sql.RawBytes": "database/sql", + "sql.Register": "database/sql", + "sql.Result": "database/sql", + "sql.Row": "database/sql", + "sql.Rows": "database/sql", + "sql.Scanner": "database/sql", + "sql.Stmt": "database/sql", + "sql.Tx": "database/sql", + "strconv.AppendBool": "strconv", + "strconv.AppendFloat": "strconv", + "strconv.AppendInt": "strconv", + "strconv.AppendQuote": "strconv", + "strconv.AppendQuoteRune": "strconv", + "strconv.AppendQuoteRuneToASCII": "strconv", + "strconv.AppendQuoteToASCII": "strconv", + "strconv.AppendUint": "strconv", + "strconv.Atoi": "strconv", + "strconv.CanBackquote": "strconv", + "strconv.ErrRange": "strconv", + "strconv.ErrSyntax": "strconv", + "strconv.FormatBool": "strconv", + "strconv.FormatFloat": "strconv", + "strconv.FormatInt": "strconv", + "strconv.FormatUint": "strconv", + "strconv.IntSize": "strconv", + "strconv.IsPrint": "strconv", + "strconv.Itoa": "strconv", + "strconv.NumError": "strconv", + "strconv.ParseBool": "strconv", + "strconv.ParseFloat": "strconv", + "strconv.ParseInt": "strconv", + "strconv.ParseUint": "strconv", + "strconv.Quote": "strconv", + "strconv.QuoteRune": "strconv", + "strconv.QuoteRuneToASCII": "strconv", + "strconv.QuoteToASCII": "strconv", + "strconv.Unquote": "strconv", + "strconv.UnquoteChar": "strconv", + "strings.Contains": "strings", + "strings.ContainsAny": "strings", + "strings.ContainsRune": "strings", + "strings.Count": "strings", + "strings.EqualFold": "strings", + "strings.Fields": "strings", + "strings.FieldsFunc": "strings", + "strings.HasPrefix": "strings", + "strings.HasSuffix": "strings", + "strings.Index": "strings", + "strings.IndexAny": "strings", + "strings.IndexByte": "strings", + "strings.IndexFunc": "strings", + "strings.IndexRune": "strings", + "strings.Join": "strings", + "strings.LastIndex": "strings", + "strings.LastIndexAny": "strings", + "strings.LastIndexFunc": "strings", + "strings.Map": "strings", + "strings.NewReader": "strings", + "strings.NewReplacer": "strings", + "strings.Reader": "strings", + "strings.Repeat": "strings", + "strings.Replace": "strings", + "strings.Replacer": "strings", + "strings.Split": "strings", + "strings.SplitAfter": "strings", + "strings.SplitAfterN": "strings", + "strings.SplitN": "strings", + "strings.Title": "strings", + "strings.ToLower": "strings", + "strings.ToLowerSpecial": "strings", + "strings.ToTitle": "strings", + "strings.ToTitleSpecial": "strings", + "strings.ToUpper": "strings", + "strings.ToUpperSpecial": "strings", + "strings.Trim": "strings", + "strings.TrimFunc": "strings", + "strings.TrimLeft": "strings", + "strings.TrimLeftFunc": "strings", + "strings.TrimPrefix": "strings", + "strings.TrimRight": "strings", + "strings.TrimRightFunc": "strings", + "strings.TrimSpace": "strings", + "strings.TrimSuffix": "strings", + "subtle.ConstantTimeByteEq": "crypto/subtle", + "subtle.ConstantTimeCompare": "crypto/subtle", + "subtle.ConstantTimeCopy": "crypto/subtle", + "subtle.ConstantTimeEq": "crypto/subtle", + "subtle.ConstantTimeLessOrEq": "crypto/subtle", + "subtle.ConstantTimeSelect": "crypto/subtle", + "suffixarray.Index": "index/suffixarray", + "suffixarray.New": "index/suffixarray", + "sync.Cond": "sync", + "sync.Locker": "sync", + "sync.Mutex": "sync", + "sync.NewCond": "sync", + "sync.Once": "sync", + "sync.RWMutex": "sync", + "sync.WaitGroup": "sync", + "syntax.ClassNL": "regexp/syntax", + "syntax.Compile": "regexp/syntax", + "syntax.DotNL": "regexp/syntax", + "syntax.EmptyBeginLine": "regexp/syntax", + "syntax.EmptyBeginText": "regexp/syntax", + "syntax.EmptyEndLine": "regexp/syntax", + "syntax.EmptyEndText": "regexp/syntax", + "syntax.EmptyNoWordBoundary": "regexp/syntax", + "syntax.EmptyOp": "regexp/syntax", + "syntax.EmptyOpContext": "regexp/syntax", + "syntax.EmptyWordBoundary": "regexp/syntax", + "syntax.ErrInternalError": "regexp/syntax", + "syntax.ErrInvalidCharClass": "regexp/syntax", + "syntax.ErrInvalidCharRange": "regexp/syntax", + "syntax.ErrInvalidEscape": "regexp/syntax", + "syntax.ErrInvalidNamedCapture": "regexp/syntax", + "syntax.ErrInvalidPerlOp": "regexp/syntax", + "syntax.ErrInvalidRepeatOp": "regexp/syntax", + "syntax.ErrInvalidRepeatSize": "regexp/syntax", + "syntax.ErrInvalidUTF8": "regexp/syntax", + "syntax.ErrMissingBracket": "regexp/syntax", + "syntax.ErrMissingParen": "regexp/syntax", + "syntax.ErrMissingRepeatArgument": "regexp/syntax", + "syntax.ErrTrailingBackslash": "regexp/syntax", + "syntax.ErrUnexpectedParen": "regexp/syntax", + "syntax.Error": "regexp/syntax", + "syntax.ErrorCode": "regexp/syntax", + "syntax.Flags": "regexp/syntax", + "syntax.FoldCase": "regexp/syntax", + "syntax.Inst": "regexp/syntax", + "syntax.InstAlt": "regexp/syntax", + "syntax.InstAltMatch": "regexp/syntax", + "syntax.InstCapture": "regexp/syntax", + "syntax.InstEmptyWidth": "regexp/syntax", + "syntax.InstFail": "regexp/syntax", + "syntax.InstMatch": "regexp/syntax", + "syntax.InstNop": "regexp/syntax", + "syntax.InstOp": "regexp/syntax", + "syntax.InstRune": "regexp/syntax", + "syntax.InstRune1": "regexp/syntax", + "syntax.InstRuneAny": "regexp/syntax", + "syntax.InstRuneAnyNotNL": "regexp/syntax", + "syntax.IsWordChar": "regexp/syntax", + "syntax.Literal": "regexp/syntax", + "syntax.MatchNL": "regexp/syntax", + "syntax.NonGreedy": "regexp/syntax", + "syntax.OneLine": "regexp/syntax", + "syntax.Op": "regexp/syntax", + "syntax.OpAlternate": "regexp/syntax", + "syntax.OpAnyChar": "regexp/syntax", + "syntax.OpAnyCharNotNL": "regexp/syntax", + "syntax.OpBeginLine": "regexp/syntax", + "syntax.OpBeginText": "regexp/syntax", + "syntax.OpCapture": "regexp/syntax", + "syntax.OpCharClass": "regexp/syntax", + "syntax.OpConcat": "regexp/syntax", + "syntax.OpEmptyMatch": "regexp/syntax", + "syntax.OpEndLine": "regexp/syntax", + "syntax.OpEndText": "regexp/syntax", + "syntax.OpLiteral": "regexp/syntax", + "syntax.OpNoMatch": "regexp/syntax", + "syntax.OpNoWordBoundary": "regexp/syntax", + "syntax.OpPlus": "regexp/syntax", + "syntax.OpQuest": "regexp/syntax", + "syntax.OpRepeat": "regexp/syntax", + "syntax.OpStar": "regexp/syntax", + "syntax.OpWordBoundary": "regexp/syntax", + "syntax.POSIX": "regexp/syntax", + "syntax.Parse": "regexp/syntax", + "syntax.Perl": "regexp/syntax", + "syntax.PerlX": "regexp/syntax", + "syntax.Prog": "regexp/syntax", + "syntax.Regexp": "regexp/syntax", + "syntax.Simple": "regexp/syntax", + "syntax.UnicodeGroups": "regexp/syntax", + "syntax.WasDollar": "regexp/syntax", + "syscall.AF_ALG": "syscall", + "syscall.AF_APPLETALK": "syscall", + "syscall.AF_ARP": "syscall", + "syscall.AF_ASH": "syscall", + "syscall.AF_ATM": "syscall", + "syscall.AF_ATMPVC": "syscall", + "syscall.AF_ATMSVC": "syscall", + "syscall.AF_AX25": "syscall", + "syscall.AF_BLUETOOTH": "syscall", + "syscall.AF_BRIDGE": "syscall", + "syscall.AF_CAIF": "syscall", + "syscall.AF_CAN": "syscall", + "syscall.AF_CCITT": "syscall", + "syscall.AF_CHAOS": "syscall", + "syscall.AF_CNT": "syscall", + "syscall.AF_COIP": "syscall", + "syscall.AF_DATAKIT": "syscall", + "syscall.AF_DECnet": "syscall", + "syscall.AF_DLI": "syscall", + "syscall.AF_E164": "syscall", + "syscall.AF_ECMA": "syscall", + "syscall.AF_ECONET": "syscall", + "syscall.AF_ENCAP": "syscall", + "syscall.AF_FILE": "syscall", + "syscall.AF_HYLINK": "syscall", + "syscall.AF_IEEE80211": "syscall", + "syscall.AF_IEEE802154": "syscall", + "syscall.AF_IMPLINK": "syscall", + "syscall.AF_INET": "syscall", + "syscall.AF_INET6": "syscall", + "syscall.AF_IPX": "syscall", + "syscall.AF_IRDA": "syscall", + "syscall.AF_ISDN": "syscall", + "syscall.AF_ISO": "syscall", + "syscall.AF_IUCV": "syscall", + "syscall.AF_KEY": "syscall", + "syscall.AF_LAT": "syscall", + "syscall.AF_LINK": "syscall", + "syscall.AF_LLC": "syscall", + "syscall.AF_LOCAL": "syscall", + "syscall.AF_MAX": "syscall", + "syscall.AF_MPLS": "syscall", + "syscall.AF_NATM": "syscall", + "syscall.AF_NDRV": "syscall", + "syscall.AF_NETBEUI": "syscall", + "syscall.AF_NETBIOS": "syscall", + "syscall.AF_NETGRAPH": "syscall", + "syscall.AF_NETLINK": "syscall", + "syscall.AF_NETROM": "syscall", + "syscall.AF_NS": "syscall", + "syscall.AF_OROUTE": "syscall", + "syscall.AF_OSI": "syscall", + "syscall.AF_PACKET": "syscall", + "syscall.AF_PHONET": "syscall", + "syscall.AF_PPP": "syscall", + "syscall.AF_PPPOX": "syscall", + "syscall.AF_PUP": "syscall", + "syscall.AF_RDS": "syscall", + "syscall.AF_RESERVED_36": "syscall", + "syscall.AF_ROSE": "syscall", + "syscall.AF_ROUTE": "syscall", + "syscall.AF_RXRPC": "syscall", + "syscall.AF_SCLUSTER": "syscall", + "syscall.AF_SECURITY": "syscall", + "syscall.AF_SIP": "syscall", + "syscall.AF_SLOW": "syscall", + "syscall.AF_SNA": "syscall", + "syscall.AF_SYSTEM": "syscall", + "syscall.AF_TIPC": "syscall", + "syscall.AF_UNIX": "syscall", + "syscall.AF_UNSPEC": "syscall", + "syscall.AF_VENDOR00": "syscall", + "syscall.AF_VENDOR01": "syscall", + "syscall.AF_VENDOR02": "syscall", + "syscall.AF_VENDOR03": "syscall", + "syscall.AF_VENDOR04": "syscall", + "syscall.AF_VENDOR05": "syscall", + "syscall.AF_VENDOR06": "syscall", + "syscall.AF_VENDOR07": "syscall", + "syscall.AF_VENDOR08": "syscall", + "syscall.AF_VENDOR09": "syscall", + "syscall.AF_VENDOR10": "syscall", + "syscall.AF_VENDOR11": "syscall", + "syscall.AF_VENDOR12": "syscall", + "syscall.AF_VENDOR13": "syscall", + "syscall.AF_VENDOR14": "syscall", + "syscall.AF_VENDOR15": "syscall", + "syscall.AF_VENDOR16": "syscall", + "syscall.AF_VENDOR17": "syscall", + "syscall.AF_VENDOR18": "syscall", + "syscall.AF_VENDOR19": "syscall", + "syscall.AF_VENDOR20": "syscall", + "syscall.AF_VENDOR21": "syscall", + "syscall.AF_VENDOR22": "syscall", + "syscall.AF_VENDOR23": "syscall", + "syscall.AF_VENDOR24": "syscall", + "syscall.AF_VENDOR25": "syscall", + "syscall.AF_VENDOR26": "syscall", + "syscall.AF_VENDOR27": "syscall", + "syscall.AF_VENDOR28": "syscall", + "syscall.AF_VENDOR29": "syscall", + "syscall.AF_VENDOR30": "syscall", + "syscall.AF_VENDOR31": "syscall", + "syscall.AF_VENDOR32": "syscall", + "syscall.AF_VENDOR33": "syscall", + "syscall.AF_VENDOR34": "syscall", + "syscall.AF_VENDOR35": "syscall", + "syscall.AF_VENDOR36": "syscall", + "syscall.AF_VENDOR37": "syscall", + "syscall.AF_VENDOR38": "syscall", + "syscall.AF_VENDOR39": "syscall", + "syscall.AF_VENDOR40": "syscall", + "syscall.AF_VENDOR41": "syscall", + "syscall.AF_VENDOR42": "syscall", + "syscall.AF_VENDOR43": "syscall", + "syscall.AF_VENDOR44": "syscall", + "syscall.AF_VENDOR45": "syscall", + "syscall.AF_VENDOR46": 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"syscall.DLT_IBM_SN": "syscall", + "syscall.DLT_IBM_SP": "syscall", + "syscall.DLT_IEEE802": "syscall", + "syscall.DLT_IEEE802_11": "syscall", + "syscall.DLT_IEEE802_11_RADIO": "syscall", + "syscall.DLT_IEEE802_11_RADIO_AVS": "syscall", + "syscall.DLT_IEEE802_15_4": "syscall", + "syscall.DLT_IEEE802_15_4_LINUX": "syscall", + "syscall.DLT_IEEE802_15_4_NOFCS": "syscall", + "syscall.DLT_IEEE802_15_4_NONASK_PHY": "syscall", + "syscall.DLT_IEEE802_16_MAC_CPS": "syscall", + "syscall.DLT_IEEE802_16_MAC_CPS_RADIO": "syscall", + "syscall.DLT_IPFILTER": "syscall", + "syscall.DLT_IPMB": "syscall", + "syscall.DLT_IPMB_LINUX": "syscall", + "syscall.DLT_IPNET": "syscall", + "syscall.DLT_IPOIB": "syscall", + "syscall.DLT_IPV4": "syscall", + "syscall.DLT_IPV6": "syscall", + "syscall.DLT_IP_OVER_FC": "syscall", + "syscall.DLT_JUNIPER_ATM1": "syscall", + "syscall.DLT_JUNIPER_ATM2": "syscall", + "syscall.DLT_JUNIPER_ATM_CEMIC": "syscall", + "syscall.DLT_JUNIPER_CHDLC": "syscall", + "syscall.DLT_JUNIPER_ES": "syscall", + "syscall.DLT_JUNIPER_ETHER": "syscall", + "syscall.DLT_JUNIPER_FIBRECHANNEL": "syscall", + "syscall.DLT_JUNIPER_FRELAY": "syscall", + "syscall.DLT_JUNIPER_GGSN": "syscall", + "syscall.DLT_JUNIPER_ISM": "syscall", + "syscall.DLT_JUNIPER_MFR": "syscall", + "syscall.DLT_JUNIPER_MLFR": "syscall", + "syscall.DLT_JUNIPER_MLPPP": "syscall", + "syscall.DLT_JUNIPER_MONITOR": "syscall", + "syscall.DLT_JUNIPER_PIC_PEER": "syscall", + "syscall.DLT_JUNIPER_PPP": "syscall", + "syscall.DLT_JUNIPER_PPPOE": "syscall", + "syscall.DLT_JUNIPER_PPPOE_ATM": "syscall", + "syscall.DLT_JUNIPER_SERVICES": "syscall", + "syscall.DLT_JUNIPER_SRX_E2E": "syscall", + "syscall.DLT_JUNIPER_ST": "syscall", + "syscall.DLT_JUNIPER_VP": "syscall", + "syscall.DLT_JUNIPER_VS": "syscall", + "syscall.DLT_LAPB_WITH_DIR": "syscall", + "syscall.DLT_LAPD": "syscall", + "syscall.DLT_LIN": "syscall", + "syscall.DLT_LINUX_EVDEV": "syscall", + "syscall.DLT_LINUX_IRDA": "syscall", + "syscall.DLT_LINUX_LAPD": "syscall", + "syscall.DLT_LINUX_PPP_WITHDIRECTION": "syscall", + "syscall.DLT_LINUX_SLL": "syscall", + "syscall.DLT_LOOP": "syscall", + "syscall.DLT_LTALK": "syscall", + "syscall.DLT_MATCHING_MAX": "syscall", + "syscall.DLT_MATCHING_MIN": "syscall", + "syscall.DLT_MFR": "syscall", + "syscall.DLT_MOST": "syscall", + "syscall.DLT_MPEG_2_TS": "syscall", + "syscall.DLT_MPLS": "syscall", + "syscall.DLT_MTP2": "syscall", + "syscall.DLT_MTP2_WITH_PHDR": "syscall", + "syscall.DLT_MTP3": "syscall", + "syscall.DLT_MUX27010": "syscall", + "syscall.DLT_NETANALYZER": "syscall", + "syscall.DLT_NETANALYZER_TRANSPARENT": "syscall", + "syscall.DLT_NFC_LLCP": "syscall", + "syscall.DLT_NFLOG": "syscall", + "syscall.DLT_NG40": "syscall", + "syscall.DLT_NULL": "syscall", + "syscall.DLT_PCI_EXP": "syscall", + "syscall.DLT_PFLOG": "syscall", + "syscall.DLT_PFSYNC": "syscall", + "syscall.DLT_PPI": "syscall", + "syscall.DLT_PPP": "syscall", + "syscall.DLT_PPP_BSDOS": "syscall", + "syscall.DLT_PPP_ETHER": "syscall", + "syscall.DLT_PPP_PPPD": "syscall", + "syscall.DLT_PPP_SERIAL": "syscall", + "syscall.DLT_PPP_WITH_DIR": "syscall", + "syscall.DLT_PPP_WITH_DIRECTION": "syscall", + "syscall.DLT_PRISM_HEADER": "syscall", + "syscall.DLT_PRONET": "syscall", + "syscall.DLT_RAIF1": "syscall", + "syscall.DLT_RAW": "syscall", + "syscall.DLT_RAWAF_MASK": "syscall", + "syscall.DLT_RIO": "syscall", + "syscall.DLT_SCCP": "syscall", + "syscall.DLT_SITA": "syscall", + "syscall.DLT_SLIP": "syscall", + "syscall.DLT_SLIP_BSDOS": "syscall", + "syscall.DLT_STANAG_5066_D_PDU": "syscall", + "syscall.DLT_SUNATM": "syscall", + "syscall.DLT_SYMANTEC_FIREWALL": "syscall", + "syscall.DLT_TZSP": "syscall", + "syscall.DLT_USB": "syscall", + "syscall.DLT_USB_LINUX": "syscall", + "syscall.DLT_USB_LINUX_MMAPPED": "syscall", + "syscall.DLT_USER0": "syscall", + "syscall.DLT_USER1": "syscall", + "syscall.DLT_USER10": "syscall", + "syscall.DLT_USER11": "syscall", + "syscall.DLT_USER12": "syscall", + "syscall.DLT_USER13": "syscall", + "syscall.DLT_USER14": "syscall", + "syscall.DLT_USER15": "syscall", + "syscall.DLT_USER2": "syscall", + "syscall.DLT_USER3": "syscall", + "syscall.DLT_USER4": "syscall", + "syscall.DLT_USER5": "syscall", + "syscall.DLT_USER6": "syscall", + "syscall.DLT_USER7": "syscall", + "syscall.DLT_USER8": "syscall", + "syscall.DLT_USER9": "syscall", + "syscall.DLT_WIHART": "syscall", + "syscall.DLT_X2E_SERIAL": "syscall", + "syscall.DLT_X2E_XORAYA": "syscall", + "syscall.DNSMXData": "syscall", + "syscall.DNSPTRData": "syscall", + "syscall.DNSRecord": "syscall", + "syscall.DNSSRVData": "syscall", + "syscall.DNSTXTData": "syscall", + "syscall.DNS_TYPE_A": "syscall", + "syscall.DNS_TYPE_A6": "syscall", + "syscall.DNS_TYPE_AAAA": "syscall", + "syscall.DNS_TYPE_ADDRS": "syscall", + "syscall.DNS_TYPE_AFSDB": "syscall", + "syscall.DNS_TYPE_ALL": "syscall", + "syscall.DNS_TYPE_ANY": "syscall", + "syscall.DNS_TYPE_ATMA": "syscall", + "syscall.DNS_TYPE_AXFR": "syscall", + "syscall.DNS_TYPE_CERT": "syscall", + "syscall.DNS_TYPE_CNAME": "syscall", + "syscall.DNS_TYPE_DHCID": "syscall", + "syscall.DNS_TYPE_DNAME": "syscall", + "syscall.DNS_TYPE_DNSKEY": "syscall", + "syscall.DNS_TYPE_DS": "syscall", + "syscall.DNS_TYPE_EID": "syscall", + "syscall.DNS_TYPE_GID": "syscall", + "syscall.DNS_TYPE_GPOS": "syscall", + "syscall.DNS_TYPE_HINFO": "syscall", + "syscall.DNS_TYPE_ISDN": "syscall", + "syscall.DNS_TYPE_IXFR": "syscall", + "syscall.DNS_TYPE_KEY": "syscall", + "syscall.DNS_TYPE_KX": "syscall", + "syscall.DNS_TYPE_LOC": "syscall", + "syscall.DNS_TYPE_MAILA": "syscall", + "syscall.DNS_TYPE_MAILB": "syscall", + "syscall.DNS_TYPE_MB": "syscall", + "syscall.DNS_TYPE_MD": "syscall", + "syscall.DNS_TYPE_MF": "syscall", + "syscall.DNS_TYPE_MG": "syscall", + "syscall.DNS_TYPE_MINFO": "syscall", + "syscall.DNS_TYPE_MR": "syscall", + "syscall.DNS_TYPE_MX": "syscall", + "syscall.DNS_TYPE_NAPTR": "syscall", + "syscall.DNS_TYPE_NBSTAT": "syscall", + "syscall.DNS_TYPE_NIMLOC": "syscall", + "syscall.DNS_TYPE_NS": "syscall", + "syscall.DNS_TYPE_NSAP": "syscall", + "syscall.DNS_TYPE_NSAPPTR": "syscall", + "syscall.DNS_TYPE_NSEC": "syscall", + "syscall.DNS_TYPE_NULL": "syscall", + "syscall.DNS_TYPE_NXT": "syscall", + "syscall.DNS_TYPE_OPT": "syscall", + "syscall.DNS_TYPE_PTR": "syscall", + "syscall.DNS_TYPE_PX": "syscall", + "syscall.DNS_TYPE_RP": "syscall", + "syscall.DNS_TYPE_RRSIG": "syscall", + "syscall.DNS_TYPE_RT": "syscall", + "syscall.DNS_TYPE_SIG": "syscall", + "syscall.DNS_TYPE_SINK": "syscall", + "syscall.DNS_TYPE_SOA": "syscall", + "syscall.DNS_TYPE_SRV": "syscall", + "syscall.DNS_TYPE_TEXT": "syscall", + "syscall.DNS_TYPE_TKEY": "syscall", + "syscall.DNS_TYPE_TSIG": "syscall", + "syscall.DNS_TYPE_UID": "syscall", + "syscall.DNS_TYPE_UINFO": "syscall", + "syscall.DNS_TYPE_UNSPEC": "syscall", + "syscall.DNS_TYPE_WINS": "syscall", + "syscall.DNS_TYPE_WINSR": "syscall", + "syscall.DNS_TYPE_WKS": "syscall", + "syscall.DNS_TYPE_X25": "syscall", + "syscall.DT_BLK": "syscall", + "syscall.DT_CHR": "syscall", + "syscall.DT_DIR": "syscall", + "syscall.DT_FIFO": "syscall", + "syscall.DT_LNK": "syscall", + "syscall.DT_REG": "syscall", + "syscall.DT_SOCK": "syscall", + "syscall.DT_UNKNOWN": "syscall", + "syscall.DT_WHT": "syscall", + "syscall.DUPLICATE_CLOSE_SOURCE": "syscall", + "syscall.DUPLICATE_SAME_ACCESS": "syscall", + "syscall.DeleteFile": "syscall", + "syscall.DetachLsf": "syscall", + "syscall.Dirent": "syscall", + "syscall.DnsQuery": "syscall", + "syscall.DnsRecordListFree": "syscall", + "syscall.Dup": "syscall", + "syscall.Dup2": "syscall", + "syscall.Dup3": "syscall", + "syscall.DuplicateHandle": "syscall", + "syscall.E2BIG": "syscall", + "syscall.EACCES": "syscall", + "syscall.EADDRINUSE": "syscall", + "syscall.EADDRNOTAVAIL": "syscall", + "syscall.EADV": "syscall", + "syscall.EAFNOSUPPORT": "syscall", + "syscall.EAGAIN": "syscall", + "syscall.EALREADY": "syscall", + "syscall.EAUTH": "syscall", + "syscall.EBADARCH": "syscall", + "syscall.EBADE": "syscall", + "syscall.EBADEXEC": "syscall", + "syscall.EBADF": "syscall", + "syscall.EBADFD": "syscall", + "syscall.EBADMACHO": "syscall", + "syscall.EBADMSG": "syscall", + "syscall.EBADR": "syscall", + "syscall.EBADRPC": "syscall", + "syscall.EBADRQC": "syscall", + "syscall.EBADSLT": "syscall", + "syscall.EBFONT": "syscall", + "syscall.EBUSY": "syscall", + "syscall.ECANCELED": "syscall", + "syscall.ECAPMODE": "syscall", + "syscall.ECHILD": "syscall", + "syscall.ECHO": "syscall", + "syscall.ECHOCTL": "syscall", + "syscall.ECHOE": "syscall", + "syscall.ECHOK": "syscall", + "syscall.ECHOKE": "syscall", + "syscall.ECHONL": "syscall", + "syscall.ECHOPRT": "syscall", + "syscall.ECHRNG": "syscall", + "syscall.ECOMM": "syscall", + "syscall.ECONNABORTED": "syscall", + "syscall.ECONNREFUSED": "syscall", + "syscall.ECONNRESET": "syscall", + "syscall.EDEADLK": "syscall", + "syscall.EDEADLOCK": "syscall", + "syscall.EDESTADDRREQ": "syscall", + "syscall.EDEVERR": "syscall", + "syscall.EDOM": "syscall", + "syscall.EDOOFUS": "syscall", + "syscall.EDOTDOT": "syscall", + "syscall.EDQUOT": "syscall", + "syscall.EEXIST": "syscall", + "syscall.EFAULT": "syscall", + "syscall.EFBIG": "syscall", + "syscall.EFER_LMA": "syscall", + "syscall.EFER_LME": "syscall", + "syscall.EFER_NXE": "syscall", + "syscall.EFER_SCE": "syscall", + "syscall.EFTYPE": "syscall", + "syscall.EHOSTDOWN": "syscall", + "syscall.EHOSTUNREACH": "syscall", + "syscall.EHWPOISON": "syscall", + "syscall.EIDRM": "syscall", + "syscall.EILSEQ": "syscall", + "syscall.EINPROGRESS": "syscall", + "syscall.EINTR": "syscall", + "syscall.EINVAL": "syscall", + "syscall.EIO": "syscall", + "syscall.EIPSEC": "syscall", + "syscall.EISCONN": "syscall", + "syscall.EISDIR": "syscall", + "syscall.EISNAM": "syscall", + "syscall.EKEYEXPIRED": "syscall", + "syscall.EKEYREJECTED": "syscall", + "syscall.EKEYREVOKED": "syscall", + "syscall.EL2HLT": "syscall", + "syscall.EL2NSYNC": "syscall", + "syscall.EL3HLT": "syscall", + "syscall.EL3RST": "syscall", + "syscall.ELAST": "syscall", + "syscall.ELF_NGREG": "syscall", + "syscall.ELF_PRARGSZ": "syscall", + "syscall.ELIBACC": "syscall", + "syscall.ELIBBAD": "syscall", + "syscall.ELIBEXEC": "syscall", + "syscall.ELIBMAX": "syscall", + "syscall.ELIBSCN": "syscall", + "syscall.ELNRNG": "syscall", + "syscall.ELOOP": "syscall", + "syscall.EMEDIUMTYPE": "syscall", + "syscall.EMFILE": "syscall", + "syscall.EMLINK": "syscall", + "syscall.EMSGSIZE": "syscall", + "syscall.EMT_TAGOVF": "syscall", + "syscall.EMULTIHOP": "syscall", + "syscall.EMUL_ENABLED": "syscall", + "syscall.EMUL_LINUX": "syscall", + "syscall.EMUL_LINUX32": "syscall", + "syscall.EMUL_MAXID": "syscall", + "syscall.EMUL_NATIVE": "syscall", + "syscall.ENAMETOOLONG": "syscall", + "syscall.ENAVAIL": "syscall", + "syscall.ENDRUNDISC": "syscall", + "syscall.ENEEDAUTH": "syscall", + "syscall.ENETDOWN": "syscall", + "syscall.ENETRESET": "syscall", + "syscall.ENETUNREACH": "syscall", + "syscall.ENFILE": "syscall", + "syscall.ENOANO": "syscall", + "syscall.ENOATTR": "syscall", + "syscall.ENOBUFS": "syscall", + "syscall.ENOCSI": "syscall", + "syscall.ENODATA": "syscall", + "syscall.ENODEV": "syscall", + "syscall.ENOENT": "syscall", + "syscall.ENOEXEC": "syscall", + "syscall.ENOKEY": "syscall", + "syscall.ENOLCK": "syscall", + "syscall.ENOLINK": "syscall", + "syscall.ENOMEDIUM": "syscall", + "syscall.ENOMEM": "syscall", + "syscall.ENOMSG": "syscall", + "syscall.ENONET": "syscall", + "syscall.ENOPKG": "syscall", + "syscall.ENOPOLICY": "syscall", + "syscall.ENOPROTOOPT": "syscall", + "syscall.ENOSPC": "syscall", + "syscall.ENOSR": "syscall", + "syscall.ENOSTR": "syscall", + "syscall.ENOSYS": "syscall", + "syscall.ENOTBLK": "syscall", + "syscall.ENOTCAPABLE": "syscall", + "syscall.ENOTCONN": "syscall", + "syscall.ENOTDIR": "syscall", + "syscall.ENOTEMPTY": "syscall", + "syscall.ENOTNAM": "syscall", + "syscall.ENOTRECOVERABLE": "syscall", + "syscall.ENOTSOCK": "syscall", + "syscall.ENOTSUP": "syscall", + "syscall.ENOTTY": "syscall", + "syscall.ENOTUNIQ": "syscall", + "syscall.ENXIO": "syscall", + "syscall.EN_SW_CTL_INF": "syscall", + "syscall.EN_SW_CTL_PREC": "syscall", + "syscall.EN_SW_CTL_ROUND": "syscall", + "syscall.EN_SW_DATACHAIN": "syscall", + "syscall.EN_SW_DENORM": "syscall", + "syscall.EN_SW_INVOP": "syscall", + "syscall.EN_SW_OVERFLOW": "syscall", + "syscall.EN_SW_PRECLOSS": "syscall", + "syscall.EN_SW_UNDERFLOW": "syscall", + "syscall.EN_SW_ZERODIV": "syscall", + "syscall.EOPNOTSUPP": "syscall", + "syscall.EOVERFLOW": "syscall", + "syscall.EOWNERDEAD": "syscall", + "syscall.EPERM": "syscall", + "syscall.EPFNOSUPPORT": "syscall", + "syscall.EPIPE": "syscall", + "syscall.EPOLLERR": "syscall", + "syscall.EPOLLET": "syscall", + "syscall.EPOLLHUP": "syscall", + "syscall.EPOLLIN": "syscall", + "syscall.EPOLLMSG": "syscall", + "syscall.EPOLLONESHOT": "syscall", + "syscall.EPOLLOUT": "syscall", + "syscall.EPOLLPRI": "syscall", + "syscall.EPOLLRDBAND": "syscall", + "syscall.EPOLLRDHUP": "syscall", + "syscall.EPOLLRDNORM": "syscall", + "syscall.EPOLLWRBAND": "syscall", + "syscall.EPOLLWRNORM": "syscall", + "syscall.EPOLL_CLOEXEC": "syscall", + "syscall.EPOLL_CTL_ADD": "syscall", + "syscall.EPOLL_CTL_DEL": "syscall", + "syscall.EPOLL_CTL_MOD": "syscall", + "syscall.EPOLL_NONBLOCK": "syscall", + "syscall.EPROCLIM": "syscall", + "syscall.EPROCUNAVAIL": "syscall", + "syscall.EPROGMISMATCH": "syscall", + "syscall.EPROGUNAVAIL": "syscall", + "syscall.EPROTO": "syscall", + "syscall.EPROTONOSUPPORT": "syscall", + "syscall.EPROTOTYPE": "syscall", + "syscall.EPWROFF": "syscall", + "syscall.ERANGE": "syscall", + "syscall.EREMCHG": "syscall", + "syscall.EREMOTE": "syscall", + "syscall.EREMOTEIO": "syscall", + "syscall.ERESTART": "syscall", + "syscall.ERFKILL": "syscall", + "syscall.EROFS": "syscall", + "syscall.ERPCMISMATCH": "syscall", + "syscall.ERROR_ACCESS_DENIED": "syscall", + "syscall.ERROR_ALREADY_EXISTS": "syscall", + "syscall.ERROR_BROKEN_PIPE": "syscall", + "syscall.ERROR_BUFFER_OVERFLOW": "syscall", + "syscall.ERROR_ENVVAR_NOT_FOUND": "syscall", + "syscall.ERROR_FILE_EXISTS": "syscall", + "syscall.ERROR_FILE_NOT_FOUND": "syscall", + "syscall.ERROR_HANDLE_EOF": "syscall", + "syscall.ERROR_INSUFFICIENT_BUFFER": "syscall", + "syscall.ERROR_IO_PENDING": "syscall", + "syscall.ERROR_MOD_NOT_FOUND": "syscall", + "syscall.ERROR_NOT_FOUND": "syscall", + "syscall.ERROR_NO_MORE_FILES": "syscall", + "syscall.ERROR_OPERATION_ABORTED": "syscall", + "syscall.ERROR_PATH_NOT_FOUND": "syscall", + "syscall.ERROR_PROC_NOT_FOUND": "syscall", + "syscall.ESHLIBVERS": "syscall", + "syscall.ESHUTDOWN": "syscall", + "syscall.ESOCKTNOSUPPORT": "syscall", + "syscall.ESPIPE": "syscall", + "syscall.ESRCH": "syscall", + "syscall.ESRMNT": "syscall", + "syscall.ESTALE": "syscall", + "syscall.ESTRPIPE": "syscall", + "syscall.ETHERCAP_JUMBO_MTU": "syscall", + "syscall.ETHERCAP_VLAN_HWTAGGING": "syscall", + "syscall.ETHERCAP_VLAN_MTU": "syscall", + "syscall.ETHERMIN": "syscall", + "syscall.ETHERMTU": "syscall", + "syscall.ETHERMTU_JUMBO": "syscall", + "syscall.ETHERTYPE_8023": "syscall", + "syscall.ETHERTYPE_AARP": "syscall", + "syscall.ETHERTYPE_ACCTON": "syscall", + "syscall.ETHERTYPE_AEONIC": "syscall", + "syscall.ETHERTYPE_ALPHA": "syscall", + "syscall.ETHERTYPE_AMBER": "syscall", + "syscall.ETHERTYPE_AMOEBA": "syscall", + "syscall.ETHERTYPE_AOE": "syscall", + "syscall.ETHERTYPE_APOLLO": "syscall", + "syscall.ETHERTYPE_APOLLODOMAIN": "syscall", + "syscall.ETHERTYPE_APPLETALK": "syscall", + "syscall.ETHERTYPE_APPLITEK": "syscall", + "syscall.ETHERTYPE_ARGONAUT": "syscall", + "syscall.ETHERTYPE_ARP": "syscall", + "syscall.ETHERTYPE_AT": "syscall", + "syscall.ETHERTYPE_ATALK": "syscall", + "syscall.ETHERTYPE_ATOMIC": "syscall", + "syscall.ETHERTYPE_ATT": "syscall", + "syscall.ETHERTYPE_ATTSTANFORD": "syscall", + "syscall.ETHERTYPE_AUTOPHON": "syscall", + "syscall.ETHERTYPE_AXIS": "syscall", + "syscall.ETHERTYPE_BCLOOP": "syscall", + "syscall.ETHERTYPE_BOFL": "syscall", + "syscall.ETHERTYPE_CABLETRON": "syscall", + "syscall.ETHERTYPE_CHAOS": "syscall", + "syscall.ETHERTYPE_COMDESIGN": "syscall", + "syscall.ETHERTYPE_COMPUGRAPHIC": "syscall", + "syscall.ETHERTYPE_COUNTERPOINT": "syscall", + "syscall.ETHERTYPE_CRONUS": "syscall", + "syscall.ETHERTYPE_CRONUSVLN": "syscall", + "syscall.ETHERTYPE_DCA": "syscall", + "syscall.ETHERTYPE_DDE": "syscall", + "syscall.ETHERTYPE_DEBNI": "syscall", + "syscall.ETHERTYPE_DECAM": "syscall", + "syscall.ETHERTYPE_DECCUST": "syscall", + "syscall.ETHERTYPE_DECDIAG": "syscall", + "syscall.ETHERTYPE_DECDNS": "syscall", + "syscall.ETHERTYPE_DECDTS": "syscall", + "syscall.ETHERTYPE_DECEXPER": "syscall", + "syscall.ETHERTYPE_DECLAST": "syscall", + "syscall.ETHERTYPE_DECLTM": "syscall", + "syscall.ETHERTYPE_DECMUMPS": "syscall", + "syscall.ETHERTYPE_DECNETBIOS": "syscall", + "syscall.ETHERTYPE_DELTACON": "syscall", + "syscall.ETHERTYPE_DIDDLE": "syscall", + "syscall.ETHERTYPE_DLOG1": "syscall", + "syscall.ETHERTYPE_DLOG2": "syscall", + "syscall.ETHERTYPE_DN": "syscall", + "syscall.ETHERTYPE_DOGFIGHT": "syscall", + "syscall.ETHERTYPE_DSMD": "syscall", + "syscall.ETHERTYPE_ECMA": "syscall", + "syscall.ETHERTYPE_ENCRYPT": "syscall", + "syscall.ETHERTYPE_ES": "syscall", + "syscall.ETHERTYPE_EXCELAN": "syscall", + "syscall.ETHERTYPE_EXPERDATA": "syscall", + "syscall.ETHERTYPE_FLIP": "syscall", + "syscall.ETHERTYPE_FLOWCONTROL": "syscall", + "syscall.ETHERTYPE_FRARP": "syscall", + "syscall.ETHERTYPE_GENDYN": "syscall", + "syscall.ETHERTYPE_HAYES": "syscall", + "syscall.ETHERTYPE_HIPPI_FP": "syscall", + "syscall.ETHERTYPE_HITACHI": "syscall", + "syscall.ETHERTYPE_HP": "syscall", + "syscall.ETHERTYPE_IEEEPUP": "syscall", + "syscall.ETHERTYPE_IEEEPUPAT": "syscall", + "syscall.ETHERTYPE_IMLBL": "syscall", + "syscall.ETHERTYPE_IMLBLDIAG": "syscall", + "syscall.ETHERTYPE_IP": "syscall", + "syscall.ETHERTYPE_IPAS": "syscall", + "syscall.ETHERTYPE_IPV6": "syscall", + "syscall.ETHERTYPE_IPX": "syscall", + "syscall.ETHERTYPE_IPXNEW": "syscall", + "syscall.ETHERTYPE_KALPANA": "syscall", + "syscall.ETHERTYPE_LANBRIDGE": "syscall", + "syscall.ETHERTYPE_LANPROBE": "syscall", + "syscall.ETHERTYPE_LAT": "syscall", + "syscall.ETHERTYPE_LBACK": "syscall", + "syscall.ETHERTYPE_LITTLE": "syscall", + "syscall.ETHERTYPE_LLDP": "syscall", + "syscall.ETHERTYPE_LOGICRAFT": "syscall", + "syscall.ETHERTYPE_LOOPBACK": "syscall", + "syscall.ETHERTYPE_MATRA": "syscall", + "syscall.ETHERTYPE_MAX": "syscall", + "syscall.ETHERTYPE_MERIT": "syscall", + "syscall.ETHERTYPE_MICP": "syscall", + "syscall.ETHERTYPE_MOPDL": "syscall", + "syscall.ETHERTYPE_MOPRC": "syscall", + "syscall.ETHERTYPE_MOTOROLA": "syscall", + "syscall.ETHERTYPE_MPLS": "syscall", + "syscall.ETHERTYPE_MPLS_MCAST": "syscall", + "syscall.ETHERTYPE_MUMPS": "syscall", + "syscall.ETHERTYPE_NBPCC": "syscall", + "syscall.ETHERTYPE_NBPCLAIM": "syscall", + "syscall.ETHERTYPE_NBPCLREQ": "syscall", + "syscall.ETHERTYPE_NBPCLRSP": "syscall", + "syscall.ETHERTYPE_NBPCREQ": "syscall", + "syscall.ETHERTYPE_NBPCRSP": "syscall", + "syscall.ETHERTYPE_NBPDG": "syscall", + "syscall.ETHERTYPE_NBPDGB": "syscall", + "syscall.ETHERTYPE_NBPDLTE": "syscall", + "syscall.ETHERTYPE_NBPRAR": "syscall", + "syscall.ETHERTYPE_NBPRAS": "syscall", + "syscall.ETHERTYPE_NBPRST": "syscall", + "syscall.ETHERTYPE_NBPSCD": "syscall", + "syscall.ETHERTYPE_NBPVCD": "syscall", + "syscall.ETHERTYPE_NBS": "syscall", + "syscall.ETHERTYPE_NCD": "syscall", + "syscall.ETHERTYPE_NESTAR": "syscall", + "syscall.ETHERTYPE_NETBEUI": "syscall", + "syscall.ETHERTYPE_NOVELL": "syscall", + "syscall.ETHERTYPE_NS": "syscall", + "syscall.ETHERTYPE_NSAT": "syscall", + "syscall.ETHERTYPE_NSCOMPAT": "syscall", + "syscall.ETHERTYPE_NTRAILER": "syscall", + "syscall.ETHERTYPE_OS9": "syscall", + "syscall.ETHERTYPE_OS9NET": "syscall", + "syscall.ETHERTYPE_PACER": "syscall", + "syscall.ETHERTYPE_PAE": "syscall", + "syscall.ETHERTYPE_PCS": "syscall", + "syscall.ETHERTYPE_PLANNING": "syscall", + "syscall.ETHERTYPE_PPP": "syscall", + "syscall.ETHERTYPE_PPPOE": "syscall", + "syscall.ETHERTYPE_PPPOEDISC": "syscall", + "syscall.ETHERTYPE_PRIMENTS": "syscall", + "syscall.ETHERTYPE_PUP": "syscall", + "syscall.ETHERTYPE_PUPAT": "syscall", + "syscall.ETHERTYPE_QINQ": "syscall", + "syscall.ETHERTYPE_RACAL": "syscall", + "syscall.ETHERTYPE_RATIONAL": "syscall", + "syscall.ETHERTYPE_RAWFR": "syscall", + "syscall.ETHERTYPE_RCL": "syscall", + "syscall.ETHERTYPE_RDP": "syscall", + "syscall.ETHERTYPE_RETIX": "syscall", + "syscall.ETHERTYPE_REVARP": "syscall", + "syscall.ETHERTYPE_SCA": "syscall", + "syscall.ETHERTYPE_SECTRA": "syscall", + "syscall.ETHERTYPE_SECUREDATA": "syscall", + "syscall.ETHERTYPE_SGITW": "syscall", + "syscall.ETHERTYPE_SG_BOUNCE": "syscall", + "syscall.ETHERTYPE_SG_DIAG": "syscall", + "syscall.ETHERTYPE_SG_NETGAMES": "syscall", + "syscall.ETHERTYPE_SG_RESV": "syscall", + "syscall.ETHERTYPE_SIMNET": "syscall", + "syscall.ETHERTYPE_SLOW": "syscall", + "syscall.ETHERTYPE_SLOWPROTOCOLS": "syscall", + "syscall.ETHERTYPE_SNA": "syscall", + "syscall.ETHERTYPE_SNMP": "syscall", + "syscall.ETHERTYPE_SONIX": "syscall", + "syscall.ETHERTYPE_SPIDER": "syscall", + "syscall.ETHERTYPE_SPRITE": "syscall", + "syscall.ETHERTYPE_STP": "syscall", + "syscall.ETHERTYPE_TALARIS": "syscall", + "syscall.ETHERTYPE_TALARISMC": "syscall", + "syscall.ETHERTYPE_TCPCOMP": "syscall", + "syscall.ETHERTYPE_TCPSM": "syscall", + "syscall.ETHERTYPE_TEC": "syscall", + "syscall.ETHERTYPE_TIGAN": "syscall", + "syscall.ETHERTYPE_TRAIL": "syscall", + "syscall.ETHERTYPE_TRANSETHER": "syscall", + "syscall.ETHERTYPE_TYMSHARE": "syscall", + "syscall.ETHERTYPE_UBBST": "syscall", + "syscall.ETHERTYPE_UBDEBUG": "syscall", + "syscall.ETHERTYPE_UBDIAGLOOP": "syscall", + "syscall.ETHERTYPE_UBDL": "syscall", + "syscall.ETHERTYPE_UBNIU": "syscall", + "syscall.ETHERTYPE_UBNMC": "syscall", + "syscall.ETHERTYPE_VALID": "syscall", + "syscall.ETHERTYPE_VARIAN": "syscall", + "syscall.ETHERTYPE_VAXELN": "syscall", + "syscall.ETHERTYPE_VEECO": "syscall", + "syscall.ETHERTYPE_VEXP": "syscall", + "syscall.ETHERTYPE_VGLAB": "syscall", + "syscall.ETHERTYPE_VINES": "syscall", + "syscall.ETHERTYPE_VINESECHO": "syscall", + "syscall.ETHERTYPE_VINESLOOP": "syscall", + "syscall.ETHERTYPE_VITAL": "syscall", + "syscall.ETHERTYPE_VLAN": "syscall", + "syscall.ETHERTYPE_VLTLMAN": "syscall", + "syscall.ETHERTYPE_VPROD": "syscall", + "syscall.ETHERTYPE_VURESERVED": "syscall", + "syscall.ETHERTYPE_WATERLOO": "syscall", + "syscall.ETHERTYPE_WELLFLEET": "syscall", + "syscall.ETHERTYPE_X25": "syscall", + "syscall.ETHERTYPE_X75": "syscall", + "syscall.ETHERTYPE_XNSSM": "syscall", + "syscall.ETHERTYPE_XTP": "syscall", + "syscall.ETHER_ADDR_LEN": "syscall", + "syscall.ETHER_ALIGN": "syscall", + "syscall.ETHER_CRC_LEN": "syscall", + "syscall.ETHER_CRC_POLY_BE": "syscall", + "syscall.ETHER_CRC_POLY_LE": "syscall", + "syscall.ETHER_HDR_LEN": "syscall", + "syscall.ETHER_MAX_DIX_LEN": "syscall", + "syscall.ETHER_MAX_LEN": "syscall", + "syscall.ETHER_MAX_LEN_JUMBO": "syscall", + "syscall.ETHER_MIN_LEN": "syscall", + "syscall.ETHER_PPPOE_ENCAP_LEN": "syscall", + "syscall.ETHER_TYPE_LEN": "syscall", + "syscall.ETHER_VLAN_ENCAP_LEN": "syscall", + "syscall.ETH_P_1588": "syscall", + "syscall.ETH_P_8021Q": "syscall", + "syscall.ETH_P_802_2": "syscall", + "syscall.ETH_P_802_3": "syscall", + "syscall.ETH_P_AARP": "syscall", + "syscall.ETH_P_ALL": "syscall", + "syscall.ETH_P_AOE": "syscall", + "syscall.ETH_P_ARCNET": "syscall", + "syscall.ETH_P_ARP": "syscall", + "syscall.ETH_P_ATALK": "syscall", + "syscall.ETH_P_ATMFATE": "syscall", + "syscall.ETH_P_ATMMPOA": "syscall", + "syscall.ETH_P_AX25": "syscall", + "syscall.ETH_P_BPQ": "syscall", + "syscall.ETH_P_CAIF": "syscall", + "syscall.ETH_P_CAN": "syscall", + "syscall.ETH_P_CONTROL": "syscall", + "syscall.ETH_P_CUST": "syscall", + "syscall.ETH_P_DDCMP": "syscall", + "syscall.ETH_P_DEC": "syscall", + "syscall.ETH_P_DIAG": "syscall", + "syscall.ETH_P_DNA_DL": "syscall", + "syscall.ETH_P_DNA_RC": "syscall", + "syscall.ETH_P_DNA_RT": "syscall", + "syscall.ETH_P_DSA": "syscall", + "syscall.ETH_P_ECONET": "syscall", + "syscall.ETH_P_EDSA": "syscall", + "syscall.ETH_P_FCOE": "syscall", + "syscall.ETH_P_FIP": "syscall", + "syscall.ETH_P_HDLC": "syscall", + "syscall.ETH_P_IEEE802154": "syscall", + "syscall.ETH_P_IEEEPUP": "syscall", + "syscall.ETH_P_IEEEPUPAT": "syscall", + "syscall.ETH_P_IP": "syscall", + "syscall.ETH_P_IPV6": "syscall", + "syscall.ETH_P_IPX": "syscall", + "syscall.ETH_P_IRDA": "syscall", + "syscall.ETH_P_LAT": "syscall", + "syscall.ETH_P_LINK_CTL": "syscall", + "syscall.ETH_P_LOCALTALK": "syscall", + "syscall.ETH_P_LOOP": "syscall", + "syscall.ETH_P_MOBITEX": "syscall", + "syscall.ETH_P_MPLS_MC": "syscall", + "syscall.ETH_P_MPLS_UC": "syscall", + "syscall.ETH_P_PAE": "syscall", + "syscall.ETH_P_PAUSE": "syscall", + "syscall.ETH_P_PHONET": "syscall", + "syscall.ETH_P_PPPTALK": "syscall", + "syscall.ETH_P_PPP_DISC": "syscall", + "syscall.ETH_P_PPP_MP": "syscall", + "syscall.ETH_P_PPP_SES": "syscall", + "syscall.ETH_P_PUP": "syscall", + "syscall.ETH_P_PUPAT": "syscall", + "syscall.ETH_P_RARP": "syscall", + "syscall.ETH_P_SCA": "syscall", + "syscall.ETH_P_SLOW": "syscall", + "syscall.ETH_P_SNAP": "syscall", + "syscall.ETH_P_TEB": "syscall", + "syscall.ETH_P_TIPC": "syscall", + "syscall.ETH_P_TRAILER": "syscall", + "syscall.ETH_P_TR_802_2": "syscall", + "syscall.ETH_P_WAN_PPP": "syscall", + "syscall.ETH_P_WCCP": "syscall", + "syscall.ETH_P_X25": "syscall", + "syscall.ETIME": "syscall", + "syscall.ETIMEDOUT": "syscall", + "syscall.ETOOMANYREFS": "syscall", + "syscall.ETXTBSY": "syscall", + "syscall.EUCLEAN": "syscall", + "syscall.EUNATCH": "syscall", + "syscall.EUSERS": "syscall", + "syscall.EVFILT_AIO": "syscall", + "syscall.EVFILT_FS": "syscall", + "syscall.EVFILT_LIO": "syscall", + "syscall.EVFILT_MACHPORT": "syscall", + "syscall.EVFILT_PROC": "syscall", + "syscall.EVFILT_READ": "syscall", + "syscall.EVFILT_SIGNAL": "syscall", + "syscall.EVFILT_SYSCOUNT": "syscall", + "syscall.EVFILT_THREADMARKER": "syscall", + "syscall.EVFILT_TIMER": "syscall", + "syscall.EVFILT_USER": "syscall", + "syscall.EVFILT_VM": "syscall", + "syscall.EVFILT_VNODE": "syscall", + "syscall.EVFILT_WRITE": "syscall", + "syscall.EV_ADD": "syscall", + "syscall.EV_CLEAR": "syscall", + "syscall.EV_DELETE": "syscall", + "syscall.EV_DISABLE": "syscall", + "syscall.EV_DISPATCH": "syscall", + "syscall.EV_ENABLE": "syscall", + "syscall.EV_EOF": "syscall", + "syscall.EV_ERROR": "syscall", + "syscall.EV_FLAG0": "syscall", + "syscall.EV_FLAG1": "syscall", + "syscall.EV_ONESHOT": "syscall", + "syscall.EV_OOBAND": "syscall", + "syscall.EV_POLL": "syscall", + "syscall.EV_RECEIPT": "syscall", + 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"syscall.FILE_NOTIFY_CHANGE_LAST_WRITE": "syscall", + "syscall.FILE_NOTIFY_CHANGE_SIZE": "syscall", + "syscall.FILE_SHARE_DELETE": "syscall", + "syscall.FILE_SHARE_READ": "syscall", + "syscall.FILE_SHARE_WRITE": "syscall", + "syscall.FILE_SKIP_COMPLETION_PORT_ON_SUCCESS": "syscall", + "syscall.FILE_SKIP_SET_EVENT_ON_HANDLE": "syscall", + "syscall.FILE_TYPE_CHAR": "syscall", + "syscall.FILE_TYPE_DISK": "syscall", + "syscall.FILE_TYPE_PIPE": "syscall", + "syscall.FILE_TYPE_REMOTE": "syscall", + "syscall.FILE_TYPE_UNKNOWN": "syscall", + "syscall.FILE_WRITE_ATTRIBUTES": "syscall", + "syscall.FLUSHO": "syscall", + "syscall.FORMAT_MESSAGE_ALLOCATE_BUFFER": "syscall", + "syscall.FORMAT_MESSAGE_ARGUMENT_ARRAY": "syscall", + "syscall.FORMAT_MESSAGE_FROM_HMODULE": "syscall", + "syscall.FORMAT_MESSAGE_FROM_STRING": "syscall", + "syscall.FORMAT_MESSAGE_FROM_SYSTEM": "syscall", + "syscall.FORMAT_MESSAGE_IGNORE_INSERTS": "syscall", + "syscall.FORMAT_MESSAGE_MAX_WIDTH_MASK": "syscall", + "syscall.F_ADDFILESIGS": "syscall", + "syscall.F_ADDSIGS": "syscall", + "syscall.F_ALLOCATEALL": "syscall", + "syscall.F_ALLOCATECONTIG": "syscall", + "syscall.F_CANCEL": "syscall", + "syscall.F_CHKCLEAN": "syscall", + "syscall.F_CLOSEM": "syscall", + "syscall.F_DUP2FD": "syscall", + "syscall.F_DUP2FD_CLOEXEC": "syscall", + "syscall.F_DUPFD": "syscall", + "syscall.F_DUPFD_CLOEXEC": "syscall", + "syscall.F_EXLCK": "syscall", + "syscall.F_FLUSH_DATA": "syscall", + "syscall.F_FREEZE_FS": "syscall", + "syscall.F_FSCTL": "syscall", + "syscall.F_FSDIRMASK": "syscall", + "syscall.F_FSIN": "syscall", + "syscall.F_FSINOUT": "syscall", + "syscall.F_FSOUT": "syscall", + "syscall.F_FSPRIV": "syscall", + "syscall.F_FSVOID": "syscall", + "syscall.F_FULLFSYNC": "syscall", + "syscall.F_GETFD": "syscall", + "syscall.F_GETFL": "syscall", + "syscall.F_GETLEASE": "syscall", + "syscall.F_GETLK": "syscall", + "syscall.F_GETLK64": "syscall", + "syscall.F_GETLKPID": "syscall", + "syscall.F_GETNOSIGPIPE": 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"syscall.Fsid": "syscall", + "syscall.Fstat": "syscall", + "syscall.Fstatfs": "syscall", + "syscall.Fstore_t": "syscall", + "syscall.Fsync": "syscall", + "syscall.Ftruncate": "syscall", + "syscall.Futimes": "syscall", + "syscall.Futimesat": "syscall", + "syscall.GENERIC_ALL": "syscall", + "syscall.GENERIC_EXECUTE": "syscall", + "syscall.GENERIC_READ": "syscall", + "syscall.GENERIC_WRITE": "syscall", + "syscall.GUID": "syscall", + "syscall.GetAcceptExSockaddrs": "syscall", + "syscall.GetAdaptersInfo": "syscall", + "syscall.GetAddrInfoW": "syscall", + "syscall.GetCommandLine": "syscall", + "syscall.GetComputerName": "syscall", + "syscall.GetConsoleMode": "syscall", + "syscall.GetCurrentDirectory": "syscall", + "syscall.GetCurrentProcess": "syscall", + "syscall.GetEnvironmentStrings": "syscall", + "syscall.GetEnvironmentVariable": "syscall", + "syscall.GetExitCodeProcess": "syscall", + "syscall.GetFileAttributes": "syscall", + "syscall.GetFileAttributesEx": "syscall", + "syscall.GetFileExInfoStandard": "syscall", + "syscall.GetFileExMaxInfoLevel": "syscall", + "syscall.GetFileInformationByHandle": "syscall", + "syscall.GetFileType": "syscall", + "syscall.GetFullPathName": "syscall", + "syscall.GetHostByName": "syscall", + "syscall.GetIfEntry": "syscall", + "syscall.GetLastError": "syscall", + "syscall.GetLengthSid": "syscall", + "syscall.GetLongPathName": "syscall", + "syscall.GetProcAddress": "syscall", + "syscall.GetProcessTimes": "syscall", + "syscall.GetProtoByName": "syscall", + "syscall.GetQueuedCompletionStatus": "syscall", + "syscall.GetServByName": "syscall", + "syscall.GetShortPathName": "syscall", + "syscall.GetStartupInfo": "syscall", + "syscall.GetStdHandle": "syscall", + "syscall.GetSystemTimeAsFileTime": "syscall", + "syscall.GetTempPath": "syscall", + "syscall.GetTimeZoneInformation": "syscall", + "syscall.GetTokenInformation": "syscall", + "syscall.GetUserNameEx": "syscall", + "syscall.GetUserProfileDirectory": "syscall", + "syscall.GetVersion": "syscall", + "syscall.Getcwd": "syscall", + "syscall.Getdents": "syscall", + "syscall.Getdirentries": "syscall", + "syscall.Getdtablesize": "syscall", + "syscall.Getegid": "syscall", + "syscall.Getenv": "syscall", + "syscall.Geteuid": "syscall", + "syscall.Getfsstat": "syscall", + "syscall.Getgid": "syscall", + "syscall.Getgroups": "syscall", + "syscall.Getpagesize": "syscall", + "syscall.Getpeername": "syscall", + "syscall.Getpgid": "syscall", + "syscall.Getpgrp": "syscall", + "syscall.Getpid": "syscall", + "syscall.Getppid": "syscall", + "syscall.Getpriority": "syscall", + "syscall.Getrlimit": "syscall", + "syscall.Getrusage": "syscall", + "syscall.Getsid": "syscall", + "syscall.Getsockname": "syscall", + "syscall.Getsockopt": "syscall", + "syscall.GetsockoptByte": "syscall", + "syscall.GetsockoptICMPv6Filter": "syscall", + "syscall.GetsockoptIPMreq": "syscall", + "syscall.GetsockoptIPMreqn": "syscall", + "syscall.GetsockoptIPv6MTUInfo": "syscall", + "syscall.GetsockoptIPv6Mreq": "syscall", + "syscall.GetsockoptInet4Addr": "syscall", + "syscall.GetsockoptInt": "syscall", + "syscall.GetsockoptUcred": "syscall", + "syscall.Gettid": "syscall", + "syscall.Gettimeofday": "syscall", + "syscall.Getuid": "syscall", + "syscall.Getwd": "syscall", + "syscall.Getxattr": "syscall", + "syscall.HANDLE_FLAG_INHERIT": "syscall", + "syscall.HKEY_CLASSES_ROOT": "syscall", + "syscall.HKEY_CURRENT_CONFIG": "syscall", + "syscall.HKEY_CURRENT_USER": "syscall", + "syscall.HKEY_DYN_DATA": "syscall", + "syscall.HKEY_LOCAL_MACHINE": "syscall", + "syscall.HKEY_PERFORMANCE_DATA": "syscall", + "syscall.HKEY_USERS": "syscall", + "syscall.HUPCL": "syscall", + "syscall.Handle": "syscall", + "syscall.Hostent": "syscall", + "syscall.ICANON": "syscall", + "syscall.ICMP6_FILTER": "syscall", + "syscall.ICMPV6_FILTER": "syscall", + "syscall.ICMPv6Filter": "syscall", + "syscall.ICRNL": "syscall", + "syscall.IEXTEN": "syscall", + "syscall.IFAN_ARRIVAL": "syscall", + "syscall.IFAN_DEPARTURE": "syscall", + "syscall.IFA_ADDRESS": "syscall", + "syscall.IFA_ANYCAST": "syscall", + "syscall.IFA_BROADCAST": "syscall", + "syscall.IFA_CACHEINFO": "syscall", + "syscall.IFA_F_DADFAILED": "syscall", + "syscall.IFA_F_DEPRECATED": "syscall", + "syscall.IFA_F_HOMEADDRESS": "syscall", + "syscall.IFA_F_NODAD": "syscall", + "syscall.IFA_F_OPTIMISTIC": "syscall", + "syscall.IFA_F_PERMANENT": "syscall", + "syscall.IFA_F_SECONDARY": "syscall", + "syscall.IFA_F_TEMPORARY": "syscall", + "syscall.IFA_F_TENTATIVE": "syscall", + "syscall.IFA_LABEL": "syscall", + "syscall.IFA_LOCAL": "syscall", + "syscall.IFA_MAX": "syscall", + "syscall.IFA_MULTICAST": "syscall", + "syscall.IFA_ROUTE": "syscall", + "syscall.IFA_UNSPEC": "syscall", + "syscall.IFF_ALLMULTI": "syscall", + "syscall.IFF_ALTPHYS": "syscall", + "syscall.IFF_AUTOMEDIA": "syscall", + "syscall.IFF_BROADCAST": "syscall", + "syscall.IFF_CANTCHANGE": "syscall", + "syscall.IFF_CANTCONFIG": "syscall", + "syscall.IFF_DEBUG": "syscall", + "syscall.IFF_DRV_OACTIVE": "syscall", + "syscall.IFF_DRV_RUNNING": "syscall", + "syscall.IFF_DYING": "syscall", + "syscall.IFF_DYNAMIC": "syscall", + "syscall.IFF_LINK0": "syscall", + "syscall.IFF_LINK1": "syscall", + "syscall.IFF_LINK2": "syscall", + "syscall.IFF_LOOPBACK": "syscall", + "syscall.IFF_MASTER": "syscall", + "syscall.IFF_MONITOR": "syscall", + "syscall.IFF_MULTICAST": "syscall", + "syscall.IFF_NOARP": "syscall", + "syscall.IFF_NOTRAILERS": "syscall", + "syscall.IFF_NO_PI": "syscall", + "syscall.IFF_OACTIVE": "syscall", + "syscall.IFF_ONE_QUEUE": "syscall", + "syscall.IFF_POINTOPOINT": "syscall", + "syscall.IFF_POINTTOPOINT": "syscall", + "syscall.IFF_PORTSEL": "syscall", + "syscall.IFF_PPROMISC": "syscall", + "syscall.IFF_PROMISC": "syscall", + "syscall.IFF_RENAMING": "syscall", + "syscall.IFF_RUNNING": "syscall", + "syscall.IFF_SIMPLEX": "syscall", + "syscall.IFF_SLAVE": "syscall", + "syscall.IFF_SMART": "syscall", + "syscall.IFF_STATICARP": "syscall", + "syscall.IFF_TAP": "syscall", + "syscall.IFF_TUN": "syscall", + "syscall.IFF_TUN_EXCL": "syscall", + "syscall.IFF_UP": "syscall", + "syscall.IFF_VNET_HDR": "syscall", + "syscall.IFLA_ADDRESS": "syscall", + "syscall.IFLA_BROADCAST": "syscall", + "syscall.IFLA_COST": "syscall", + "syscall.IFLA_IFALIAS": "syscall", + "syscall.IFLA_IFNAME": "syscall", + "syscall.IFLA_LINK": "syscall", + "syscall.IFLA_LINKINFO": "syscall", + "syscall.IFLA_LINKMODE": "syscall", + "syscall.IFLA_MAP": "syscall", + "syscall.IFLA_MASTER": "syscall", + "syscall.IFLA_MAX": "syscall", + "syscall.IFLA_MTU": "syscall", + "syscall.IFLA_NET_NS_PID": "syscall", + "syscall.IFLA_OPERSTATE": "syscall", + "syscall.IFLA_PRIORITY": "syscall", + "syscall.IFLA_PROTINFO": "syscall", + "syscall.IFLA_QDISC": "syscall", + "syscall.IFLA_STATS": "syscall", + "syscall.IFLA_TXQLEN": "syscall", + "syscall.IFLA_UNSPEC": "syscall", + "syscall.IFLA_WEIGHT": "syscall", + "syscall.IFLA_WIRELESS": 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"syscall.IFT_CELLULAR": "syscall", + "syscall.IFT_CEPT": "syscall", + "syscall.IFT_CES": "syscall", + "syscall.IFT_CHANNEL": "syscall", + "syscall.IFT_CNR": "syscall", + "syscall.IFT_COFFEE": "syscall", + "syscall.IFT_COMPOSITELINK": "syscall", + "syscall.IFT_DCN": "syscall", + "syscall.IFT_DIGITALPOWERLINE": "syscall", + "syscall.IFT_DIGITALWRAPPEROVERHEADCHANNEL": "syscall", + "syscall.IFT_DLSW": "syscall", + "syscall.IFT_DOCSCABLEDOWNSTREAM": "syscall", + "syscall.IFT_DOCSCABLEMACLAYER": "syscall", + "syscall.IFT_DOCSCABLEUPSTREAM": "syscall", + "syscall.IFT_DOCSCABLEUPSTREAMCHANNEL": "syscall", + "syscall.IFT_DS0": "syscall", + "syscall.IFT_DS0BUNDLE": "syscall", + "syscall.IFT_DS1FDL": "syscall", + "syscall.IFT_DS3": "syscall", + "syscall.IFT_DTM": "syscall", + "syscall.IFT_DUMMY": "syscall", + "syscall.IFT_DVBASILN": "syscall", + "syscall.IFT_DVBASIOUT": "syscall", + "syscall.IFT_DVBRCCDOWNSTREAM": "syscall", + "syscall.IFT_DVBRCCMACLAYER": "syscall", + "syscall.IFT_DVBRCCUPSTREAM": "syscall", + "syscall.IFT_ECONET": "syscall", + "syscall.IFT_ENC": "syscall", + "syscall.IFT_EON": "syscall", + "syscall.IFT_EPLRS": "syscall", + "syscall.IFT_ESCON": "syscall", + "syscall.IFT_ETHER": "syscall", + "syscall.IFT_FAITH": "syscall", + "syscall.IFT_FAST": "syscall", + "syscall.IFT_FASTETHER": "syscall", + "syscall.IFT_FASTETHERFX": "syscall", + "syscall.IFT_FDDI": "syscall", + "syscall.IFT_FIBRECHANNEL": "syscall", + "syscall.IFT_FRAMERELAYINTERCONNECT": "syscall", + "syscall.IFT_FRAMERELAYMPI": "syscall", + "syscall.IFT_FRDLCIENDPT": "syscall", + "syscall.IFT_FRELAY": "syscall", + "syscall.IFT_FRELAYDCE": "syscall", + "syscall.IFT_FRF16MFRBUNDLE": "syscall", + "syscall.IFT_FRFORWARD": "syscall", + "syscall.IFT_G703AT2MB": "syscall", + "syscall.IFT_G703AT64K": "syscall", + "syscall.IFT_GIF": "syscall", + "syscall.IFT_GIGABITETHERNET": "syscall", + "syscall.IFT_GR303IDT": "syscall", + "syscall.IFT_GR303RDT": "syscall", + "syscall.IFT_H323GATEKEEPER": "syscall", + "syscall.IFT_H323PROXY": "syscall", + "syscall.IFT_HDH1822": "syscall", + "syscall.IFT_HDLC": "syscall", + "syscall.IFT_HDSL2": "syscall", + "syscall.IFT_HIPERLAN2": "syscall", + "syscall.IFT_HIPPI": "syscall", + "syscall.IFT_HIPPIINTERFACE": "syscall", + "syscall.IFT_HOSTPAD": "syscall", + "syscall.IFT_HSSI": "syscall", + "syscall.IFT_HY": "syscall", + "syscall.IFT_IBM370PARCHAN": "syscall", + "syscall.IFT_IDSL": "syscall", + "syscall.IFT_IEEE1394": "syscall", + "syscall.IFT_IEEE80211": "syscall", + "syscall.IFT_IEEE80212": "syscall", + "syscall.IFT_IEEE8023ADLAG": "syscall", + "syscall.IFT_IFGSN": "syscall", + "syscall.IFT_IMT": "syscall", + "syscall.IFT_INFINIBAND": "syscall", + "syscall.IFT_INTERLEAVE": "syscall", + "syscall.IFT_IP": "syscall", + "syscall.IFT_IPFORWARD": "syscall", + "syscall.IFT_IPOVERATM": "syscall", + "syscall.IFT_IPOVERCDLC": "syscall", + "syscall.IFT_IPOVERCLAW": "syscall", + "syscall.IFT_IPSWITCH": "syscall", + "syscall.IFT_IPXIP": "syscall", + "syscall.IFT_ISDN": "syscall", + "syscall.IFT_ISDNBASIC": "syscall", + "syscall.IFT_ISDNPRIMARY": "syscall", + "syscall.IFT_ISDNS": "syscall", + "syscall.IFT_ISDNU": "syscall", + "syscall.IFT_ISO88022LLC": "syscall", + "syscall.IFT_ISO88023": "syscall", + "syscall.IFT_ISO88024": "syscall", + "syscall.IFT_ISO88025": "syscall", + "syscall.IFT_ISO88025CRFPINT": "syscall", + "syscall.IFT_ISO88025DTR": "syscall", + "syscall.IFT_ISO88025FIBER": "syscall", + "syscall.IFT_ISO88026": "syscall", + "syscall.IFT_ISUP": "syscall", + "syscall.IFT_L2VLAN": "syscall", + "syscall.IFT_L3IPVLAN": "syscall", + "syscall.IFT_L3IPXVLAN": "syscall", + "syscall.IFT_LAPB": "syscall", + "syscall.IFT_LAPD": "syscall", + "syscall.IFT_LAPF": "syscall", + "syscall.IFT_LINEGROUP": "syscall", + "syscall.IFT_LOCALTALK": "syscall", + "syscall.IFT_LOOP": "syscall", + "syscall.IFT_MEDIAMAILOVERIP": "syscall", + "syscall.IFT_MFSIGLINK": "syscall", + "syscall.IFT_MIOX25": "syscall", + "syscall.IFT_MODEM": "syscall", + "syscall.IFT_MPC": "syscall", + "syscall.IFT_MPLS": "syscall", + "syscall.IFT_MPLSTUNNEL": "syscall", + "syscall.IFT_MSDSL": "syscall", + "syscall.IFT_MVL": "syscall", + "syscall.IFT_MYRINET": "syscall", + "syscall.IFT_NFAS": "syscall", + "syscall.IFT_NSIP": "syscall", + "syscall.IFT_OPTICALCHANNEL": "syscall", + "syscall.IFT_OPTICALTRANSPORT": "syscall", + "syscall.IFT_OTHER": "syscall", + "syscall.IFT_P10": "syscall", + "syscall.IFT_P80": "syscall", + "syscall.IFT_PARA": "syscall", + "syscall.IFT_PDP": "syscall", + "syscall.IFT_PFLOG": "syscall", + "syscall.IFT_PFLOW": "syscall", + "syscall.IFT_PFSYNC": "syscall", + "syscall.IFT_PLC": "syscall", + "syscall.IFT_PON155": "syscall", + "syscall.IFT_PON622": "syscall", + "syscall.IFT_POS": "syscall", + "syscall.IFT_PPP": "syscall", + "syscall.IFT_PPPMULTILINKBUNDLE": "syscall", + "syscall.IFT_PROPATM": "syscall", + "syscall.IFT_PROPBWAP2MP": "syscall", + "syscall.IFT_PROPCNLS": "syscall", + "syscall.IFT_PROPDOCSWIRELESSDOWNSTREAM": "syscall", + "syscall.IFT_PROPDOCSWIRELESSMACLAYER": "syscall", + "syscall.IFT_PROPDOCSWIRELESSUPSTREAM": "syscall", + "syscall.IFT_PROPMUX": "syscall", + "syscall.IFT_PROPVIRTUAL": "syscall", + "syscall.IFT_PROPWIRELESSP2P": "syscall", + "syscall.IFT_PTPSERIAL": "syscall", + "syscall.IFT_PVC": "syscall", + "syscall.IFT_Q2931": "syscall", + "syscall.IFT_QLLC": "syscall", + "syscall.IFT_RADIOMAC": "syscall", + "syscall.IFT_RADSL": "syscall", + "syscall.IFT_REACHDSL": "syscall", + "syscall.IFT_RFC1483": "syscall", + "syscall.IFT_RS232": "syscall", + "syscall.IFT_RSRB": "syscall", + "syscall.IFT_SDLC": "syscall", + "syscall.IFT_SDSL": "syscall", + "syscall.IFT_SHDSL": "syscall", + "syscall.IFT_SIP": "syscall", + "syscall.IFT_SIPSIG": "syscall", + "syscall.IFT_SIPTG": "syscall", + "syscall.IFT_SLIP": "syscall", + "syscall.IFT_SMDSDXI": "syscall", + "syscall.IFT_SMDSICIP": "syscall", + "syscall.IFT_SONET": "syscall", + "syscall.IFT_SONETOVERHEADCHANNEL": "syscall", + "syscall.IFT_SONETPATH": "syscall", + "syscall.IFT_SONETVT": "syscall", + "syscall.IFT_SRP": "syscall", + "syscall.IFT_SS7SIGLINK": "syscall", + "syscall.IFT_STACKTOSTACK": "syscall", + "syscall.IFT_STARLAN": "syscall", + "syscall.IFT_STF": "syscall", + "syscall.IFT_T1": "syscall", + "syscall.IFT_TDLC": "syscall", + "syscall.IFT_TELINK": "syscall", + "syscall.IFT_TERMPAD": "syscall", + "syscall.IFT_TR008": "syscall", + "syscall.IFT_TRANSPHDLC": "syscall", + "syscall.IFT_TUNNEL": "syscall", + "syscall.IFT_ULTRA": "syscall", + "syscall.IFT_USB": "syscall", + "syscall.IFT_V11": "syscall", + "syscall.IFT_V35": "syscall", + "syscall.IFT_V36": "syscall", + "syscall.IFT_V37": "syscall", + "syscall.IFT_VDSL": "syscall", + "syscall.IFT_VIRTUALIPADDRESS": "syscall", + "syscall.IFT_VIRTUALTG": "syscall", + "syscall.IFT_VOICEDID": "syscall", + "syscall.IFT_VOICEEM": "syscall", + "syscall.IFT_VOICEEMFGD": "syscall", + "syscall.IFT_VOICEENCAP": "syscall", + "syscall.IFT_VOICEFGDEANA": "syscall", + "syscall.IFT_VOICEFXO": "syscall", + "syscall.IFT_VOICEFXS": "syscall", + "syscall.IFT_VOICEOVERATM": "syscall", + "syscall.IFT_VOICEOVERCABLE": "syscall", + "syscall.IFT_VOICEOVERFRAMERELAY": "syscall", + "syscall.IFT_VOICEOVERIP": "syscall", + "syscall.IFT_X213": "syscall", + "syscall.IFT_X25": "syscall", + "syscall.IFT_X25DDN": "syscall", + "syscall.IFT_X25HUNTGROUP": "syscall", + "syscall.IFT_X25MLP": "syscall", + "syscall.IFT_X25PLE": "syscall", + "syscall.IFT_XETHER": "syscall", + "syscall.IGNBRK": "syscall", + "syscall.IGNCR": "syscall", + "syscall.IGNORE": "syscall", + "syscall.IGNPAR": "syscall", + "syscall.IMAXBEL": "syscall", + "syscall.INFINITE": "syscall", + "syscall.INLCR": "syscall", + "syscall.INPCK": "syscall", + "syscall.INVALID_FILE_ATTRIBUTES": "syscall", + "syscall.IN_ACCESS": "syscall", + "syscall.IN_ALL_EVENTS": "syscall", + "syscall.IN_ATTRIB": "syscall", + "syscall.IN_CLASSA_HOST": "syscall", + "syscall.IN_CLASSA_MAX": "syscall", + "syscall.IN_CLASSA_NET": "syscall", + "syscall.IN_CLASSA_NSHIFT": "syscall", + "syscall.IN_CLASSB_HOST": "syscall", + "syscall.IN_CLASSB_MAX": "syscall", + "syscall.IN_CLASSB_NET": "syscall", + "syscall.IN_CLASSB_NSHIFT": "syscall", + "syscall.IN_CLASSC_HOST": "syscall", + "syscall.IN_CLASSC_NET": "syscall", + "syscall.IN_CLASSC_NSHIFT": "syscall", + "syscall.IN_CLASSD_HOST": "syscall", + "syscall.IN_CLASSD_NET": "syscall", + "syscall.IN_CLASSD_NSHIFT": "syscall", + "syscall.IN_CLOEXEC": "syscall", + "syscall.IN_CLOSE": "syscall", + "syscall.IN_CLOSE_NOWRITE": "syscall", + "syscall.IN_CLOSE_WRITE": "syscall", + "syscall.IN_CREATE": "syscall", + "syscall.IN_DELETE": "syscall", + "syscall.IN_DELETE_SELF": "syscall", + "syscall.IN_DONT_FOLLOW": "syscall", + "syscall.IN_EXCL_UNLINK": "syscall", + "syscall.IN_IGNORED": "syscall", + "syscall.IN_ISDIR": "syscall", + "syscall.IN_LINKLOCALNETNUM": "syscall", + "syscall.IN_LOOPBACKNET": "syscall", + "syscall.IN_MASK_ADD": "syscall", + "syscall.IN_MODIFY": "syscall", + "syscall.IN_MOVE": "syscall", + "syscall.IN_MOVED_FROM": "syscall", + "syscall.IN_MOVED_TO": "syscall", + "syscall.IN_MOVE_SELF": "syscall", + "syscall.IN_NONBLOCK": "syscall", + "syscall.IN_ONESHOT": "syscall", + "syscall.IN_ONLYDIR": "syscall", + "syscall.IN_OPEN": "syscall", + "syscall.IN_Q_OVERFLOW": "syscall", + "syscall.IN_RFC3021_HOST": "syscall", + "syscall.IN_RFC3021_MASK": "syscall", + "syscall.IN_RFC3021_NET": "syscall", + "syscall.IN_RFC3021_NSHIFT": "syscall", + "syscall.IN_UNMOUNT": "syscall", + "syscall.IOC_IN": "syscall", + "syscall.IOC_INOUT": "syscall", + "syscall.IOC_OUT": "syscall", + "syscall.IOC_WS2": "syscall", + "syscall.IPMreq": "syscall", + "syscall.IPMreqn": "syscall", + "syscall.IPPROTO_3PC": "syscall", + "syscall.IPPROTO_ADFS": "syscall", + "syscall.IPPROTO_AH": "syscall", + "syscall.IPPROTO_AHIP": "syscall", + "syscall.IPPROTO_APES": "syscall", + "syscall.IPPROTO_ARGUS": "syscall", + "syscall.IPPROTO_AX25": "syscall", + "syscall.IPPROTO_BHA": "syscall", + "syscall.IPPROTO_BLT": "syscall", + "syscall.IPPROTO_BRSATMON": "syscall", + "syscall.IPPROTO_CARP": "syscall", + "syscall.IPPROTO_CFTP": "syscall", + "syscall.IPPROTO_CHAOS": "syscall", + "syscall.IPPROTO_CMTP": "syscall", + "syscall.IPPROTO_COMP": "syscall", + "syscall.IPPROTO_CPHB": "syscall", + "syscall.IPPROTO_CPNX": "syscall", + "syscall.IPPROTO_DCCP": "syscall", + "syscall.IPPROTO_DDP": "syscall", + "syscall.IPPROTO_DGP": "syscall", + "syscall.IPPROTO_DIVERT": "syscall", + "syscall.IPPROTO_DONE": "syscall", + "syscall.IPPROTO_DSTOPTS": "syscall", + "syscall.IPPROTO_EGP": "syscall", + "syscall.IPPROTO_EMCON": "syscall", + "syscall.IPPROTO_ENCAP": "syscall", + "syscall.IPPROTO_EON": "syscall", + "syscall.IPPROTO_ESP": "syscall", + "syscall.IPPROTO_ETHERIP": "syscall", + "syscall.IPPROTO_FRAGMENT": "syscall", + "syscall.IPPROTO_GGP": "syscall", + "syscall.IPPROTO_GMTP": "syscall", + "syscall.IPPROTO_GRE": "syscall", + "syscall.IPPROTO_HELLO": "syscall", + "syscall.IPPROTO_HMP": "syscall", + "syscall.IPPROTO_HOPOPTS": "syscall", + "syscall.IPPROTO_ICMP": "syscall", + "syscall.IPPROTO_ICMPV6": "syscall", + "syscall.IPPROTO_IDP": "syscall", + "syscall.IPPROTO_IDPR": "syscall", + "syscall.IPPROTO_IDRP": "syscall", + "syscall.IPPROTO_IGMP": "syscall", + "syscall.IPPROTO_IGP": "syscall", + "syscall.IPPROTO_IGRP": "syscall", + "syscall.IPPROTO_IL": "syscall", + "syscall.IPPROTO_INLSP": "syscall", + "syscall.IPPROTO_INP": "syscall", + "syscall.IPPROTO_IP": "syscall", + "syscall.IPPROTO_IPCOMP": "syscall", + "syscall.IPPROTO_IPCV": "syscall", + "syscall.IPPROTO_IPEIP": "syscall", + "syscall.IPPROTO_IPIP": "syscall", + "syscall.IPPROTO_IPPC": "syscall", + "syscall.IPPROTO_IPV4": "syscall", + "syscall.IPPROTO_IPV6": "syscall", + "syscall.IPPROTO_IPV6_ICMP": "syscall", + "syscall.IPPROTO_IRTP": "syscall", + "syscall.IPPROTO_KRYPTOLAN": "syscall", + "syscall.IPPROTO_LARP": "syscall", + "syscall.IPPROTO_LEAF1": "syscall", + "syscall.IPPROTO_LEAF2": "syscall", + "syscall.IPPROTO_MAX": "syscall", + "syscall.IPPROTO_MAXID": "syscall", + "syscall.IPPROTO_MEAS": "syscall", + "syscall.IPPROTO_MH": "syscall", + "syscall.IPPROTO_MHRP": "syscall", + "syscall.IPPROTO_MICP": "syscall", + "syscall.IPPROTO_MOBILE": "syscall", + "syscall.IPPROTO_MPLS": "syscall", + "syscall.IPPROTO_MTP": "syscall", + "syscall.IPPROTO_MUX": "syscall", + "syscall.IPPROTO_ND": "syscall", + "syscall.IPPROTO_NHRP": "syscall", + "syscall.IPPROTO_NONE": "syscall", + "syscall.IPPROTO_NSP": "syscall", + "syscall.IPPROTO_NVPII": "syscall", + "syscall.IPPROTO_OLD_DIVERT": "syscall", + "syscall.IPPROTO_OSPFIGP": "syscall", + "syscall.IPPROTO_PFSYNC": "syscall", + "syscall.IPPROTO_PGM": "syscall", + "syscall.IPPROTO_PIGP": "syscall", + "syscall.IPPROTO_PIM": "syscall", + "syscall.IPPROTO_PRM": "syscall", + "syscall.IPPROTO_PUP": "syscall", + "syscall.IPPROTO_PVP": "syscall", + "syscall.IPPROTO_RAW": "syscall", + "syscall.IPPROTO_RCCMON": "syscall", + "syscall.IPPROTO_RDP": "syscall", + "syscall.IPPROTO_ROUTING": "syscall", + "syscall.IPPROTO_RSVP": "syscall", + "syscall.IPPROTO_RVD": "syscall", + "syscall.IPPROTO_SATEXPAK": "syscall", + "syscall.IPPROTO_SATMON": "syscall", + "syscall.IPPROTO_SCCSP": "syscall", + "syscall.IPPROTO_SCTP": "syscall", + "syscall.IPPROTO_SDRP": "syscall", + "syscall.IPPROTO_SEND": "syscall", + "syscall.IPPROTO_SEP": "syscall", + "syscall.IPPROTO_SKIP": "syscall", + "syscall.IPPROTO_SPACER": "syscall", + "syscall.IPPROTO_SRPC": "syscall", + "syscall.IPPROTO_ST": "syscall", + "syscall.IPPROTO_SVMTP": "syscall", + "syscall.IPPROTO_SWIPE": "syscall", + "syscall.IPPROTO_TCF": "syscall", + "syscall.IPPROTO_TCP": "syscall", + "syscall.IPPROTO_TLSP": "syscall", + "syscall.IPPROTO_TP": "syscall", + "syscall.IPPROTO_TPXX": "syscall", + "syscall.IPPROTO_TRUNK1": "syscall", + "syscall.IPPROTO_TRUNK2": "syscall", + "syscall.IPPROTO_TTP": "syscall", + "syscall.IPPROTO_UDP": "syscall", + "syscall.IPPROTO_UDPLITE": "syscall", + "syscall.IPPROTO_VINES": "syscall", + "syscall.IPPROTO_VISA": "syscall", + "syscall.IPPROTO_VMTP": "syscall", + "syscall.IPPROTO_VRRP": "syscall", + "syscall.IPPROTO_WBEXPAK": "syscall", + "syscall.IPPROTO_WBMON": "syscall", + "syscall.IPPROTO_WSN": "syscall", + "syscall.IPPROTO_XNET": "syscall", + "syscall.IPPROTO_XTP": "syscall", + "syscall.IPV6_2292DSTOPTS": "syscall", + "syscall.IPV6_2292HOPLIMIT": "syscall", + "syscall.IPV6_2292HOPOPTS": "syscall", + "syscall.IPV6_2292NEXTHOP": "syscall", + "syscall.IPV6_2292PKTINFO": "syscall", + "syscall.IPV6_2292PKTOPTIONS": "syscall", + "syscall.IPV6_2292RTHDR": "syscall", + "syscall.IPV6_ADDRFORM": "syscall", + "syscall.IPV6_ADD_MEMBERSHIP": "syscall", + "syscall.IPV6_AUTHHDR": "syscall", + "syscall.IPV6_AUTH_LEVEL": "syscall", + "syscall.IPV6_AUTOFLOWLABEL": "syscall", + "syscall.IPV6_BINDANY": "syscall", + "syscall.IPV6_BINDV6ONLY": "syscall", + "syscall.IPV6_BOUND_IF": "syscall", + "syscall.IPV6_CHECKSUM": "syscall", + "syscall.IPV6_DEFAULT_MULTICAST_HOPS": "syscall", + "syscall.IPV6_DEFAULT_MULTICAST_LOOP": "syscall", + "syscall.IPV6_DEFHLIM": "syscall", + "syscall.IPV6_DONTFRAG": "syscall", + "syscall.IPV6_DROP_MEMBERSHIP": "syscall", + "syscall.IPV6_DSTOPTS": "syscall", + "syscall.IPV6_ESP_NETWORK_LEVEL": "syscall", + "syscall.IPV6_ESP_TRANS_LEVEL": "syscall", + "syscall.IPV6_FAITH": "syscall", + "syscall.IPV6_FLOWINFO_MASK": "syscall", + "syscall.IPV6_FLOWLABEL_MASK": "syscall", + "syscall.IPV6_FRAGTTL": "syscall", + "syscall.IPV6_FW_ADD": "syscall", + "syscall.IPV6_FW_DEL": "syscall", + "syscall.IPV6_FW_FLUSH": "syscall", + "syscall.IPV6_FW_GET": "syscall", + "syscall.IPV6_FW_ZERO": "syscall", + "syscall.IPV6_HLIMDEC": "syscall", + "syscall.IPV6_HOPLIMIT": "syscall", + "syscall.IPV6_HOPOPTS": "syscall", + "syscall.IPV6_IPCOMP_LEVEL": "syscall", + "syscall.IPV6_IPSEC_POLICY": "syscall", + "syscall.IPV6_JOIN_ANYCAST": "syscall", + "syscall.IPV6_JOIN_GROUP": "syscall", + "syscall.IPV6_LEAVE_ANYCAST": "syscall", + "syscall.IPV6_LEAVE_GROUP": "syscall", + "syscall.IPV6_MAXHLIM": "syscall", + "syscall.IPV6_MAXOPTHDR": "syscall", + "syscall.IPV6_MAXPACKET": "syscall", + "syscall.IPV6_MAX_GROUP_SRC_FILTER": "syscall", + "syscall.IPV6_MAX_MEMBERSHIPS": "syscall", + "syscall.IPV6_MAX_SOCK_SRC_FILTER": "syscall", + "syscall.IPV6_MIN_MEMBERSHIPS": "syscall", + "syscall.IPV6_MMTU": "syscall", + "syscall.IPV6_MSFILTER": "syscall", + "syscall.IPV6_MTU": "syscall", + "syscall.IPV6_MTU_DISCOVER": "syscall", + "syscall.IPV6_MULTICAST_HOPS": "syscall", + "syscall.IPV6_MULTICAST_IF": "syscall", + "syscall.IPV6_MULTICAST_LOOP": "syscall", + "syscall.IPV6_NEXTHOP": "syscall", + "syscall.IPV6_OPTIONS": "syscall", + "syscall.IPV6_PATHMTU": "syscall", + "syscall.IPV6_PIPEX": "syscall", + "syscall.IPV6_PKTINFO": "syscall", + "syscall.IPV6_PMTUDISC_DO": "syscall", + "syscall.IPV6_PMTUDISC_DONT": "syscall", + "syscall.IPV6_PMTUDISC_PROBE": "syscall", + "syscall.IPV6_PMTUDISC_WANT": "syscall", + "syscall.IPV6_PORTRANGE": "syscall", + "syscall.IPV6_PORTRANGE_DEFAULT": "syscall", + "syscall.IPV6_PORTRANGE_HIGH": "syscall", + "syscall.IPV6_PORTRANGE_LOW": "syscall", + "syscall.IPV6_PREFER_TEMPADDR": "syscall", + "syscall.IPV6_RECVDSTOPTS": "syscall", + "syscall.IPV6_RECVERR": "syscall", + "syscall.IPV6_RECVHOPLIMIT": "syscall", + "syscall.IPV6_RECVHOPOPTS": "syscall", + "syscall.IPV6_RECVPATHMTU": "syscall", + "syscall.IPV6_RECVPKTINFO": "syscall", + "syscall.IPV6_RECVRTHDR": "syscall", + "syscall.IPV6_RECVTCLASS": "syscall", + "syscall.IPV6_ROUTER_ALERT": "syscall", + "syscall.IPV6_RTABLE": "syscall", + "syscall.IPV6_RTHDR": "syscall", + "syscall.IPV6_RTHDRDSTOPTS": "syscall", + "syscall.IPV6_RTHDR_LOOSE": "syscall", + "syscall.IPV6_RTHDR_STRICT": "syscall", + "syscall.IPV6_RTHDR_TYPE_0": "syscall", + "syscall.IPV6_RXDSTOPTS": "syscall", + "syscall.IPV6_RXHOPOPTS": "syscall", + "syscall.IPV6_SOCKOPT_RESERVED1": "syscall", + "syscall.IPV6_TCLASS": "syscall", + "syscall.IPV6_UNICAST_HOPS": "syscall", + "syscall.IPV6_USE_MIN_MTU": "syscall", + "syscall.IPV6_V6ONLY": "syscall", + "syscall.IPV6_VERSION": "syscall", + "syscall.IPV6_VERSION_MASK": "syscall", + "syscall.IPV6_XFRM_POLICY": "syscall", + "syscall.IP_ADD_MEMBERSHIP": "syscall", + "syscall.IP_ADD_SOURCE_MEMBERSHIP": "syscall", + "syscall.IP_AUTH_LEVEL": "syscall", + "syscall.IP_BINDANY": "syscall", + "syscall.IP_BLOCK_SOURCE": "syscall", + "syscall.IP_BOUND_IF": "syscall", + "syscall.IP_DEFAULT_MULTICAST_LOOP": "syscall", + "syscall.IP_DEFAULT_MULTICAST_TTL": "syscall", + "syscall.IP_DF": "syscall", + "syscall.IP_DONTFRAG": "syscall", + "syscall.IP_DROP_MEMBERSHIP": "syscall", + "syscall.IP_DROP_SOURCE_MEMBERSHIP": "syscall", + "syscall.IP_DUMMYNET3": "syscall", + "syscall.IP_DUMMYNET_CONFIGURE": "syscall", + "syscall.IP_DUMMYNET_DEL": "syscall", + "syscall.IP_DUMMYNET_FLUSH": "syscall", + "syscall.IP_DUMMYNET_GET": "syscall", + "syscall.IP_EF": "syscall", + "syscall.IP_ERRORMTU": "syscall", + "syscall.IP_ESP_NETWORK_LEVEL": "syscall", + "syscall.IP_ESP_TRANS_LEVEL": "syscall", + "syscall.IP_FAITH": "syscall", + "syscall.IP_FREEBIND": "syscall", + "syscall.IP_FW3": "syscall", + "syscall.IP_FW_ADD": "syscall", + "syscall.IP_FW_DEL": "syscall", + "syscall.IP_FW_FLUSH": "syscall", + "syscall.IP_FW_GET": "syscall", + "syscall.IP_FW_NAT_CFG": "syscall", + "syscall.IP_FW_NAT_DEL": "syscall", + "syscall.IP_FW_NAT_GET_CONFIG": "syscall", + "syscall.IP_FW_NAT_GET_LOG": "syscall", + "syscall.IP_FW_RESETLOG": "syscall", + "syscall.IP_FW_TABLE_ADD": "syscall", + "syscall.IP_FW_TABLE_DEL": "syscall", + "syscall.IP_FW_TABLE_FLUSH": "syscall", + "syscall.IP_FW_TABLE_GETSIZE": "syscall", + "syscall.IP_FW_TABLE_LIST": "syscall", + "syscall.IP_FW_ZERO": "syscall", + "syscall.IP_HDRINCL": "syscall", + "syscall.IP_IPCOMP_LEVEL": "syscall", + "syscall.IP_IPSECFLOWINFO": "syscall", + "syscall.IP_IPSEC_LOCAL_AUTH": "syscall", + "syscall.IP_IPSEC_LOCAL_CRED": "syscall", + "syscall.IP_IPSEC_LOCAL_ID": "syscall", + "syscall.IP_IPSEC_POLICY": "syscall", + "syscall.IP_IPSEC_REMOTE_AUTH": "syscall", + "syscall.IP_IPSEC_REMOTE_CRED": "syscall", + "syscall.IP_IPSEC_REMOTE_ID": "syscall", + "syscall.IP_MAXPACKET": "syscall", + "syscall.IP_MAX_GROUP_SRC_FILTER": "syscall", + "syscall.IP_MAX_MEMBERSHIPS": "syscall", + "syscall.IP_MAX_SOCK_MUTE_FILTER": "syscall", + "syscall.IP_MAX_SOCK_SRC_FILTER": "syscall", + "syscall.IP_MAX_SOURCE_FILTER": "syscall", + "syscall.IP_MF": "syscall", + "syscall.IP_MINFRAGSIZE": "syscall", + "syscall.IP_MINTTL": "syscall", + "syscall.IP_MIN_MEMBERSHIPS": "syscall", + "syscall.IP_MSFILTER": "syscall", + "syscall.IP_MSS": "syscall", + "syscall.IP_MTU": "syscall", + "syscall.IP_MTU_DISCOVER": "syscall", + "syscall.IP_MULTICAST_IF": "syscall", + "syscall.IP_MULTICAST_IFINDEX": "syscall", + "syscall.IP_MULTICAST_LOOP": "syscall", + "syscall.IP_MULTICAST_TTL": "syscall", + "syscall.IP_MULTICAST_VIF": "syscall", + "syscall.IP_NAT__XXX": "syscall", + "syscall.IP_OFFMASK": "syscall", + "syscall.IP_OLD_FW_ADD": "syscall", + "syscall.IP_OLD_FW_DEL": "syscall", + "syscall.IP_OLD_FW_FLUSH": "syscall", + "syscall.IP_OLD_FW_GET": "syscall", + "syscall.IP_OLD_FW_RESETLOG": "syscall", + "syscall.IP_OLD_FW_ZERO": "syscall", + "syscall.IP_ONESBCAST": "syscall", + "syscall.IP_OPTIONS": "syscall", + "syscall.IP_ORIGDSTADDR": "syscall", + "syscall.IP_PASSSEC": "syscall", + "syscall.IP_PIPEX": "syscall", + "syscall.IP_PKTINFO": "syscall", + "syscall.IP_PKTOPTIONS": "syscall", + "syscall.IP_PMTUDISC": "syscall", + "syscall.IP_PMTUDISC_DO": "syscall", + "syscall.IP_PMTUDISC_DONT": "syscall", + "syscall.IP_PMTUDISC_PROBE": "syscall", + "syscall.IP_PMTUDISC_WANT": "syscall", + "syscall.IP_PORTRANGE": "syscall", + "syscall.IP_PORTRANGE_DEFAULT": "syscall", + "syscall.IP_PORTRANGE_HIGH": "syscall", + "syscall.IP_PORTRANGE_LOW": "syscall", + "syscall.IP_RECVDSTADDR": "syscall", + "syscall.IP_RECVDSTPORT": "syscall", + "syscall.IP_RECVERR": "syscall", + "syscall.IP_RECVIF": "syscall", + "syscall.IP_RECVOPTS": "syscall", + "syscall.IP_RECVORIGDSTADDR": "syscall", + "syscall.IP_RECVPKTINFO": "syscall", + "syscall.IP_RECVRETOPTS": "syscall", + "syscall.IP_RECVRTABLE": "syscall", + "syscall.IP_RECVTOS": "syscall", + "syscall.IP_RECVTTL": "syscall", + "syscall.IP_RETOPTS": "syscall", + "syscall.IP_RF": "syscall", + "syscall.IP_ROUTER_ALERT": "syscall", + "syscall.IP_RSVP_OFF": "syscall", + "syscall.IP_RSVP_ON": "syscall", + "syscall.IP_RSVP_VIF_OFF": "syscall", + "syscall.IP_RSVP_VIF_ON": "syscall", + "syscall.IP_RTABLE": "syscall", + "syscall.IP_SENDSRCADDR": "syscall", + "syscall.IP_STRIPHDR": "syscall", + "syscall.IP_TOS": "syscall", + "syscall.IP_TRAFFIC_MGT_BACKGROUND": "syscall", + "syscall.IP_TRANSPARENT": "syscall", + "syscall.IP_TTL": "syscall", + "syscall.IP_UNBLOCK_SOURCE": "syscall", + "syscall.IP_XFRM_POLICY": "syscall", + "syscall.IPv6MTUInfo": "syscall", + "syscall.IPv6Mreq": "syscall", + "syscall.ISIG": "syscall", + "syscall.ISTRIP": "syscall", + "syscall.IUCLC": "syscall", + "syscall.IUTF8": "syscall", + "syscall.IXANY": "syscall", + "syscall.IXOFF": "syscall", + "syscall.IXON": "syscall", + "syscall.IfAddrmsg": "syscall", + "syscall.IfAnnounceMsghdr": "syscall", + "syscall.IfData": "syscall", + "syscall.IfInfomsg": "syscall", + "syscall.IfMsghdr": "syscall", + "syscall.IfaMsghdr": "syscall", + "syscall.IfmaMsghdr": "syscall", + "syscall.IfmaMsghdr2": "syscall", + "syscall.ImplementsGetwd": "syscall", + "syscall.Inet4Pktinfo": "syscall", + "syscall.Inet6Pktinfo": "syscall", + "syscall.InotifyAddWatch": "syscall", + "syscall.InotifyEvent": "syscall", + "syscall.InotifyInit": "syscall", + "syscall.InotifyInit1": "syscall", + "syscall.InotifyRmWatch": "syscall", + "syscall.InterfaceAddrMessage": "syscall", + "syscall.InterfaceAnnounceMessage": "syscall", + "syscall.InterfaceInfo": "syscall", + "syscall.InterfaceMessage": 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+ "syscall.LANG_ENGLISH": "syscall", + "syscall.LAYERED_PROTOCOL": "syscall", + "syscall.LCNT_OVERLOAD_FLUSH": "syscall", + "syscall.LINUX_REBOOT_CMD_CAD_OFF": "syscall", + "syscall.LINUX_REBOOT_CMD_CAD_ON": "syscall", + "syscall.LINUX_REBOOT_CMD_HALT": "syscall", + "syscall.LINUX_REBOOT_CMD_KEXEC": "syscall", + "syscall.LINUX_REBOOT_CMD_POWER_OFF": "syscall", + "syscall.LINUX_REBOOT_CMD_RESTART": "syscall", + "syscall.LINUX_REBOOT_CMD_RESTART2": "syscall", + "syscall.LINUX_REBOOT_CMD_SW_SUSPEND": "syscall", + "syscall.LINUX_REBOOT_MAGIC1": "syscall", + "syscall.LINUX_REBOOT_MAGIC2": "syscall", + "syscall.LOCK_EX": "syscall", + "syscall.LOCK_NB": "syscall", + "syscall.LOCK_SH": "syscall", + "syscall.LOCK_UN": "syscall", + "syscall.LazyDLL": "syscall", + "syscall.LazyProc": "syscall", + "syscall.Lchown": "syscall", + "syscall.Linger": "syscall", + "syscall.Link": "syscall", + "syscall.Listen": "syscall", + "syscall.Listxattr": "syscall", + "syscall.LoadCancelIoEx": "syscall", + 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+ "syscall.MNT_FORCE": "syscall", + "syscall.MSG_BCAST": "syscall", + "syscall.MSG_CMSG_CLOEXEC": "syscall", + "syscall.MSG_COMPAT": "syscall", + "syscall.MSG_CONFIRM": "syscall", + "syscall.MSG_CONTROLMBUF": "syscall", + "syscall.MSG_CTRUNC": "syscall", + "syscall.MSG_DONTROUTE": "syscall", + "syscall.MSG_DONTWAIT": "syscall", + "syscall.MSG_EOF": "syscall", + "syscall.MSG_EOR": "syscall", + "syscall.MSG_ERRQUEUE": "syscall", + "syscall.MSG_FASTOPEN": "syscall", + "syscall.MSG_FIN": "syscall", + "syscall.MSG_FLUSH": "syscall", + "syscall.MSG_HAVEMORE": "syscall", + "syscall.MSG_HOLD": "syscall", + "syscall.MSG_IOVUSRSPACE": "syscall", + "syscall.MSG_LENUSRSPACE": "syscall", + "syscall.MSG_MCAST": "syscall", + "syscall.MSG_MORE": "syscall", + "syscall.MSG_NAMEMBUF": "syscall", + "syscall.MSG_NBIO": "syscall", + "syscall.MSG_NEEDSA": "syscall", + "syscall.MSG_NOSIGNAL": "syscall", + "syscall.MSG_NOTIFICATION": "syscall", + "syscall.MSG_OOB": "syscall", + "syscall.MSG_PEEK": "syscall", + 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"syscall.NLMSG_ALIGNTO": "syscall", + "syscall.NLMSG_DONE": "syscall", + "syscall.NLMSG_ERROR": "syscall", + "syscall.NLMSG_HDRLEN": "syscall", + "syscall.NLMSG_MIN_TYPE": "syscall", + "syscall.NLMSG_NOOP": "syscall", + "syscall.NLMSG_OVERRUN": "syscall", + "syscall.NLM_F_ACK": "syscall", + "syscall.NLM_F_APPEND": "syscall", + "syscall.NLM_F_ATOMIC": "syscall", + "syscall.NLM_F_CREATE": "syscall", + "syscall.NLM_F_DUMP": "syscall", + "syscall.NLM_F_ECHO": "syscall", + "syscall.NLM_F_EXCL": "syscall", + "syscall.NLM_F_MATCH": "syscall", + "syscall.NLM_F_MULTI": "syscall", + "syscall.NLM_F_REPLACE": "syscall", + "syscall.NLM_F_REQUEST": "syscall", + "syscall.NLM_F_ROOT": "syscall", + "syscall.NOFLSH": "syscall", + "syscall.NOTE_ABSOLUTE": "syscall", + "syscall.NOTE_ATTRIB": "syscall", + "syscall.NOTE_CHILD": "syscall", + "syscall.NOTE_DELETE": "syscall", + "syscall.NOTE_EOF": "syscall", + "syscall.NOTE_EXEC": "syscall", + "syscall.NOTE_EXIT": "syscall", + "syscall.NOTE_EXITSTATUS": 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"syscall.SIOCBRDGGRL": "syscall", + "syscall.SIOCBRDGGSIFS": "syscall", + "syscall.SIOCBRDGGTO": "syscall", + "syscall.SIOCBRDGIFS": "syscall", + "syscall.SIOCBRDGRTS": "syscall", + "syscall.SIOCBRDGSADDR": "syscall", + "syscall.SIOCBRDGSCACHE": "syscall", + "syscall.SIOCBRDGSFD": "syscall", + "syscall.SIOCBRDGSHT": "syscall", + "syscall.SIOCBRDGSIFCOST": "syscall", + "syscall.SIOCBRDGSIFFLGS": "syscall", + "syscall.SIOCBRDGSIFPRIO": "syscall", + "syscall.SIOCBRDGSMA": "syscall", + "syscall.SIOCBRDGSPRI": "syscall", + "syscall.SIOCBRDGSPROTO": "syscall", + "syscall.SIOCBRDGSTO": "syscall", + "syscall.SIOCBRDGSTXHC": "syscall", + "syscall.SIOCDARP": "syscall", + "syscall.SIOCDELDLCI": "syscall", + "syscall.SIOCDELMULTI": "syscall", + "syscall.SIOCDELRT": "syscall", + "syscall.SIOCDEVPRIVATE": "syscall", + "syscall.SIOCDIFADDR": "syscall", + "syscall.SIOCDIFGROUP": "syscall", + "syscall.SIOCDIFPHYADDR": "syscall", + "syscall.SIOCDLIFADDR": "syscall", + "syscall.SIOCDRARP": "syscall", + "syscall.SIOCGARP": "syscall", + "syscall.SIOCGDRVSPEC": "syscall", + "syscall.SIOCGETKALIVE": "syscall", + "syscall.SIOCGETLABEL": "syscall", + "syscall.SIOCGETPFLOW": "syscall", + "syscall.SIOCGETPFSYNC": "syscall", + "syscall.SIOCGETSGCNT": "syscall", + "syscall.SIOCGETVIFCNT": "syscall", + "syscall.SIOCGETVLAN": "syscall", + "syscall.SIOCGHIWAT": "syscall", + "syscall.SIOCGIFADDR": "syscall", + "syscall.SIOCGIFADDRPREF": "syscall", + "syscall.SIOCGIFALIAS": "syscall", + "syscall.SIOCGIFALTMTU": "syscall", + "syscall.SIOCGIFASYNCMAP": "syscall", + "syscall.SIOCGIFBOND": "syscall", + "syscall.SIOCGIFBR": "syscall", + "syscall.SIOCGIFBRDADDR": "syscall", + "syscall.SIOCGIFCAP": "syscall", + "syscall.SIOCGIFCONF": "syscall", + "syscall.SIOCGIFCOUNT": "syscall", + "syscall.SIOCGIFDATA": "syscall", + "syscall.SIOCGIFDESCR": "syscall", + "syscall.SIOCGIFDEVMTU": "syscall", + "syscall.SIOCGIFDLT": "syscall", + "syscall.SIOCGIFDSTADDR": "syscall", + "syscall.SIOCGIFENCAP": "syscall", + 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"syscall", + "syscall.SIOCGIFTXQLEN": "syscall", + "syscall.SIOCGIFVLAN": "syscall", + "syscall.SIOCGIFWAKEFLAGS": "syscall", + "syscall.SIOCGIFXFLAGS": "syscall", + "syscall.SIOCGLIFADDR": "syscall", + "syscall.SIOCGLIFPHYADDR": "syscall", + "syscall.SIOCGLIFPHYRTABLE": "syscall", + "syscall.SIOCGLINKSTR": "syscall", + "syscall.SIOCGLOWAT": "syscall", + "syscall.SIOCGPGRP": "syscall", + "syscall.SIOCGPRIVATE_0": "syscall", + "syscall.SIOCGPRIVATE_1": "syscall", + "syscall.SIOCGRARP": "syscall", + "syscall.SIOCGSTAMP": "syscall", + "syscall.SIOCGSTAMPNS": "syscall", + "syscall.SIOCGVH": "syscall", + "syscall.SIOCIFCREATE": "syscall", + "syscall.SIOCIFCREATE2": "syscall", + "syscall.SIOCIFDESTROY": "syscall", + "syscall.SIOCIFGCLONERS": "syscall", + "syscall.SIOCINITIFADDR": "syscall", + "syscall.SIOCPROTOPRIVATE": "syscall", + "syscall.SIOCRSLVMULTI": "syscall", + "syscall.SIOCRTMSG": "syscall", + "syscall.SIOCSARP": "syscall", + "syscall.SIOCSDRVSPEC": "syscall", + 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"syscall.SYS_EXTATTR_SET_FD": "syscall", + "syscall.SYS_EXTATTR_SET_FILE": "syscall", + "syscall.SYS_EXTATTR_SET_LINK": "syscall", + "syscall.SYS_FACCESSAT": "syscall", + "syscall.SYS_FADVISE64": "syscall", + "syscall.SYS_FADVISE64_64": "syscall", + "syscall.SYS_FALLOCATE": "syscall", + "syscall.SYS_FANOTIFY_INIT": "syscall", + "syscall.SYS_FANOTIFY_MARK": "syscall", + "syscall.SYS_FCHDIR": "syscall", + "syscall.SYS_FCHFLAGS": "syscall", + "syscall.SYS_FCHMOD": "syscall", + "syscall.SYS_FCHMODAT": "syscall", + "syscall.SYS_FCHMOD_EXTENDED": "syscall", + "syscall.SYS_FCHOWN": "syscall", + "syscall.SYS_FCHOWN32": "syscall", + "syscall.SYS_FCHOWNAT": "syscall", + "syscall.SYS_FCHROOT": "syscall", + "syscall.SYS_FCNTL": "syscall", + "syscall.SYS_FCNTL64": "syscall", + "syscall.SYS_FCNTL_NOCANCEL": "syscall", + "syscall.SYS_FDATASYNC": "syscall", + "syscall.SYS_FEXECVE": "syscall", + "syscall.SYS_FFCLOCK_GETCOUNTER": "syscall", + "syscall.SYS_FFCLOCK_GETESTIMATE": "syscall", + "syscall.SYS_FFCLOCK_SETESTIMATE": "syscall", + "syscall.SYS_FFSCTL": "syscall", + "syscall.SYS_FGETATTRLIST": "syscall", + "syscall.SYS_FGETXATTR": "syscall", + "syscall.SYS_FHOPEN": "syscall", + "syscall.SYS_FHSTAT": "syscall", + "syscall.SYS_FHSTATFS": "syscall", + "syscall.SYS_FILEPORT_MAKEFD": "syscall", + "syscall.SYS_FILEPORT_MAKEPORT": "syscall", + "syscall.SYS_FKTRACE": "syscall", + "syscall.SYS_FLISTXATTR": "syscall", + "syscall.SYS_FLOCK": "syscall", + "syscall.SYS_FORK": "syscall", + "syscall.SYS_FPATHCONF": "syscall", + "syscall.SYS_FREEBSD6_FTRUNCATE": "syscall", + "syscall.SYS_FREEBSD6_LSEEK": "syscall", + "syscall.SYS_FREEBSD6_MMAP": "syscall", + "syscall.SYS_FREEBSD6_PREAD": "syscall", + "syscall.SYS_FREEBSD6_PWRITE": "syscall", + "syscall.SYS_FREEBSD6_TRUNCATE": "syscall", + "syscall.SYS_FREMOVEXATTR": "syscall", + "syscall.SYS_FSCTL": "syscall", + "syscall.SYS_FSETATTRLIST": "syscall", + "syscall.SYS_FSETXATTR": "syscall", + "syscall.SYS_FSGETPATH": "syscall", + "syscall.SYS_FSTAT": "syscall", + "syscall.SYS_FSTAT64": "syscall", + "syscall.SYS_FSTAT64_EXTENDED": "syscall", + "syscall.SYS_FSTATAT": "syscall", + "syscall.SYS_FSTATAT64": "syscall", + "syscall.SYS_FSTATFS": "syscall", + "syscall.SYS_FSTATFS64": "syscall", + "syscall.SYS_FSTATV": "syscall", + "syscall.SYS_FSTATVFS1": "syscall", + "syscall.SYS_FSTAT_EXTENDED": "syscall", + "syscall.SYS_FSYNC": "syscall", + "syscall.SYS_FSYNC_NOCANCEL": "syscall", + "syscall.SYS_FSYNC_RANGE": "syscall", + "syscall.SYS_FTIME": "syscall", + "syscall.SYS_FTRUNCATE": "syscall", + "syscall.SYS_FTRUNCATE64": "syscall", + "syscall.SYS_FUTEX": "syscall", + "syscall.SYS_FUTIMENS": "syscall", + "syscall.SYS_FUTIMES": "syscall", + "syscall.SYS_FUTIMESAT": "syscall", + "syscall.SYS_GETATTRLIST": "syscall", + "syscall.SYS_GETAUDIT": "syscall", + "syscall.SYS_GETAUDIT_ADDR": "syscall", + "syscall.SYS_GETAUID": "syscall", + "syscall.SYS_GETCONTEXT": "syscall", + "syscall.SYS_GETCPU": "syscall", + "syscall.SYS_GETCWD": "syscall", + "syscall.SYS_GETDENTS": "syscall", + "syscall.SYS_GETDENTS64": "syscall", + "syscall.SYS_GETDIRENTRIES": "syscall", + "syscall.SYS_GETDIRENTRIES64": "syscall", + "syscall.SYS_GETDIRENTRIESATTR": "syscall", + "syscall.SYS_GETDTABLECOUNT": "syscall", + "syscall.SYS_GETDTABLESIZE": "syscall", + "syscall.SYS_GETEGID": "syscall", + "syscall.SYS_GETEGID32": "syscall", + "syscall.SYS_GETEUID": "syscall", + "syscall.SYS_GETEUID32": "syscall", + "syscall.SYS_GETFH": "syscall", + "syscall.SYS_GETFSSTAT": "syscall", + "syscall.SYS_GETFSSTAT64": "syscall", + "syscall.SYS_GETGID": "syscall", + "syscall.SYS_GETGID32": "syscall", + "syscall.SYS_GETGROUPS": "syscall", + "syscall.SYS_GETGROUPS32": "syscall", + "syscall.SYS_GETHOSTUUID": "syscall", + "syscall.SYS_GETITIMER": "syscall", + "syscall.SYS_GETLCID": "syscall", + "syscall.SYS_GETLOGIN": "syscall", + "syscall.SYS_GETLOGINCLASS": "syscall", + "syscall.SYS_GETPEERNAME": "syscall", + "syscall.SYS_GETPGID": "syscall", + "syscall.SYS_GETPGRP": "syscall", + "syscall.SYS_GETPID": "syscall", + "syscall.SYS_GETPMSG": "syscall", + "syscall.SYS_GETPPID": "syscall", + "syscall.SYS_GETPRIORITY": "syscall", + "syscall.SYS_GETRESGID": "syscall", + "syscall.SYS_GETRESGID32": "syscall", + "syscall.SYS_GETRESUID": "syscall", + "syscall.SYS_GETRESUID32": "syscall", + "syscall.SYS_GETRLIMIT": "syscall", + "syscall.SYS_GETRTABLE": "syscall", + "syscall.SYS_GETRUSAGE": "syscall", + "syscall.SYS_GETSGROUPS": "syscall", + "syscall.SYS_GETSID": "syscall", + "syscall.SYS_GETSOCKNAME": "syscall", + "syscall.SYS_GETSOCKOPT": "syscall", + "syscall.SYS_GETTHRID": "syscall", + "syscall.SYS_GETTID": "syscall", + "syscall.SYS_GETTIMEOFDAY": "syscall", + "syscall.SYS_GETUID": "syscall", + "syscall.SYS_GETUID32": "syscall", + "syscall.SYS_GETVFSSTAT": "syscall", + "syscall.SYS_GETWGROUPS": "syscall", + "syscall.SYS_GETXATTR": "syscall", + "syscall.SYS_GET_KERNEL_SYMS": "syscall", + "syscall.SYS_GET_MEMPOLICY": "syscall", + "syscall.SYS_GET_ROBUST_LIST": "syscall", + "syscall.SYS_GET_THREAD_AREA": "syscall", + "syscall.SYS_GTTY": "syscall", + "syscall.SYS_IDENTITYSVC": "syscall", + "syscall.SYS_IDLE": "syscall", + "syscall.SYS_INITGROUPS": "syscall", + "syscall.SYS_INIT_MODULE": "syscall", + "syscall.SYS_INOTIFY_ADD_WATCH": "syscall", + "syscall.SYS_INOTIFY_INIT": "syscall", + "syscall.SYS_INOTIFY_INIT1": "syscall", + "syscall.SYS_INOTIFY_RM_WATCH": "syscall", + "syscall.SYS_IOCTL": "syscall", + "syscall.SYS_IOPERM": "syscall", + "syscall.SYS_IOPL": "syscall", + "syscall.SYS_IOPOLICYSYS": "syscall", + "syscall.SYS_IOPRIO_GET": "syscall", + "syscall.SYS_IOPRIO_SET": "syscall", + "syscall.SYS_IO_CANCEL": "syscall", + "syscall.SYS_IO_DESTROY": "syscall", + "syscall.SYS_IO_GETEVENTS": "syscall", + "syscall.SYS_IO_SETUP": "syscall", + "syscall.SYS_IO_SUBMIT": "syscall", + "syscall.SYS_IPC": "syscall", + "syscall.SYS_ISSETUGID": "syscall", + "syscall.SYS_JAIL": "syscall", + "syscall.SYS_JAIL_ATTACH": "syscall", + "syscall.SYS_JAIL_GET": "syscall", + "syscall.SYS_JAIL_REMOVE": "syscall", + "syscall.SYS_JAIL_SET": "syscall", + "syscall.SYS_KDEBUG_TRACE": "syscall", + "syscall.SYS_KENV": "syscall", + "syscall.SYS_KEVENT": "syscall", + "syscall.SYS_KEVENT64": "syscall", + "syscall.SYS_KEXEC_LOAD": "syscall", + "syscall.SYS_KEYCTL": "syscall", + "syscall.SYS_KILL": "syscall", + "syscall.SYS_KLDFIND": "syscall", + "syscall.SYS_KLDFIRSTMOD": "syscall", + "syscall.SYS_KLDLOAD": "syscall", + "syscall.SYS_KLDNEXT": "syscall", + "syscall.SYS_KLDSTAT": "syscall", + "syscall.SYS_KLDSYM": "syscall", + "syscall.SYS_KLDUNLOAD": "syscall", + "syscall.SYS_KLDUNLOADF": "syscall", + "syscall.SYS_KQUEUE": "syscall", + "syscall.SYS_KQUEUE1": "syscall", + "syscall.SYS_KTIMER_CREATE": "syscall", + "syscall.SYS_KTIMER_DELETE": "syscall", + "syscall.SYS_KTIMER_GETOVERRUN": "syscall", + "syscall.SYS_KTIMER_GETTIME": "syscall", + "syscall.SYS_KTIMER_SETTIME": "syscall", + "syscall.SYS_KTRACE": "syscall", + "syscall.SYS_LCHFLAGS": "syscall", + "syscall.SYS_LCHMOD": "syscall", + "syscall.SYS_LCHOWN": "syscall", + "syscall.SYS_LCHOWN32": "syscall", + "syscall.SYS_LGETFH": "syscall", + "syscall.SYS_LGETXATTR": "syscall", + "syscall.SYS_LINK": "syscall", + "syscall.SYS_LINKAT": "syscall", + "syscall.SYS_LIO_LISTIO": "syscall", + "syscall.SYS_LISTEN": "syscall", + "syscall.SYS_LISTXATTR": "syscall", + "syscall.SYS_LLISTXATTR": "syscall", + "syscall.SYS_LOCK": "syscall", + "syscall.SYS_LOOKUP_DCOOKIE": "syscall", + "syscall.SYS_LPATHCONF": "syscall", + "syscall.SYS_LREMOVEXATTR": "syscall", + "syscall.SYS_LSEEK": "syscall", + "syscall.SYS_LSETXATTR": "syscall", + "syscall.SYS_LSTAT": "syscall", + "syscall.SYS_LSTAT64": "syscall", + "syscall.SYS_LSTAT64_EXTENDED": "syscall", + "syscall.SYS_LSTATV": "syscall", + "syscall.SYS_LSTAT_EXTENDED": "syscall", + "syscall.SYS_LUTIMES": "syscall", + "syscall.SYS_MAC_SYSCALL": "syscall", + "syscall.SYS_MADVISE": "syscall", + "syscall.SYS_MADVISE1": "syscall", + "syscall.SYS_MAXSYSCALL": "syscall", + "syscall.SYS_MBIND": "syscall", + "syscall.SYS_MIGRATE_PAGES": "syscall", + "syscall.SYS_MINCORE": "syscall", + "syscall.SYS_MINHERIT": "syscall", + "syscall.SYS_MKCOMPLEX": "syscall", + "syscall.SYS_MKDIR": "syscall", + "syscall.SYS_MKDIRAT": "syscall", + "syscall.SYS_MKDIR_EXTENDED": "syscall", + "syscall.SYS_MKFIFO": "syscall", + "syscall.SYS_MKFIFOAT": "syscall", + "syscall.SYS_MKFIFO_EXTENDED": "syscall", + "syscall.SYS_MKNOD": "syscall", + "syscall.SYS_MKNODAT": "syscall", + "syscall.SYS_MLOCK": "syscall", + "syscall.SYS_MLOCKALL": "syscall", + "syscall.SYS_MMAP": "syscall", + "syscall.SYS_MMAP2": "syscall", + "syscall.SYS_MODCTL": "syscall", + "syscall.SYS_MODFIND": "syscall", + "syscall.SYS_MODFNEXT": "syscall", + "syscall.SYS_MODIFY_LDT": "syscall", + "syscall.SYS_MODNEXT": "syscall", + "syscall.SYS_MODSTAT": "syscall", + "syscall.SYS_MODWATCH": "syscall", + "syscall.SYS_MOUNT": "syscall", + "syscall.SYS_MOVE_PAGES": "syscall", + "syscall.SYS_MPROTECT": "syscall", + "syscall.SYS_MPX": "syscall", + "syscall.SYS_MQUERY": "syscall", + "syscall.SYS_MQ_GETSETATTR": "syscall", + "syscall.SYS_MQ_NOTIFY": "syscall", + "syscall.SYS_MQ_OPEN": "syscall", + "syscall.SYS_MQ_TIMEDRECEIVE": "syscall", + "syscall.SYS_MQ_TIMEDSEND": "syscall", + "syscall.SYS_MQ_UNLINK": "syscall", + "syscall.SYS_MREMAP": "syscall", + "syscall.SYS_MSGCTL": "syscall", + "syscall.SYS_MSGGET": "syscall", + "syscall.SYS_MSGRCV": "syscall", + "syscall.SYS_MSGRCV_NOCANCEL": "syscall", + "syscall.SYS_MSGSND": "syscall", + "syscall.SYS_MSGSND_NOCANCEL": "syscall", + "syscall.SYS_MSGSYS": "syscall", + "syscall.SYS_MSYNC": "syscall", + "syscall.SYS_MSYNC_NOCANCEL": "syscall", + "syscall.SYS_MUNLOCK": "syscall", + "syscall.SYS_MUNLOCKALL": "syscall", + "syscall.SYS_MUNMAP": "syscall", + "syscall.SYS_NAME_TO_HANDLE_AT": "syscall", + "syscall.SYS_NANOSLEEP": "syscall", + "syscall.SYS_NEWFSTATAT": "syscall", + "syscall.SYS_NFSCLNT": "syscall", + "syscall.SYS_NFSSERVCTL": "syscall", + "syscall.SYS_NFSSVC": "syscall", + "syscall.SYS_NFSTAT": "syscall", + "syscall.SYS_NICE": "syscall", + "syscall.SYS_NLSTAT": "syscall", + "syscall.SYS_NMOUNT": "syscall", + "syscall.SYS_NSTAT": "syscall", + "syscall.SYS_NTP_ADJTIME": "syscall", + "syscall.SYS_NTP_GETTIME": "syscall", + "syscall.SYS_OABI_SYSCALL_BASE": "syscall", + "syscall.SYS_OBREAK": "syscall", + "syscall.SYS_OLDFSTAT": "syscall", + "syscall.SYS_OLDLSTAT": "syscall", + "syscall.SYS_OLDOLDUNAME": "syscall", + "syscall.SYS_OLDSTAT": "syscall", + "syscall.SYS_OLDUNAME": "syscall", + "syscall.SYS_OPEN": "syscall", + "syscall.SYS_OPENAT": "syscall", + "syscall.SYS_OPENBSD_POLL": "syscall", + "syscall.SYS_OPEN_BY_HANDLE_AT": "syscall", + "syscall.SYS_OPEN_EXTENDED": "syscall", + "syscall.SYS_OPEN_NOCANCEL": "syscall", + "syscall.SYS_OVADVISE": "syscall", + "syscall.SYS_PACCEPT": "syscall", + "syscall.SYS_PATHCONF": "syscall", + "syscall.SYS_PAUSE": "syscall", + "syscall.SYS_PCICONFIG_IOBASE": "syscall", + "syscall.SYS_PCICONFIG_READ": "syscall", + "syscall.SYS_PCICONFIG_WRITE": "syscall", + "syscall.SYS_PDFORK": "syscall", + "syscall.SYS_PDGETPID": "syscall", + "syscall.SYS_PDKILL": "syscall", + "syscall.SYS_PERF_EVENT_OPEN": "syscall", + "syscall.SYS_PERSONALITY": "syscall", + "syscall.SYS_PID_HIBERNATE": "syscall", + "syscall.SYS_PID_RESUME": "syscall", + "syscall.SYS_PID_SHUTDOWN_SOCKETS": "syscall", + "syscall.SYS_PID_SUSPEND": "syscall", + "syscall.SYS_PIPE": "syscall", + "syscall.SYS_PIPE2": "syscall", + "syscall.SYS_PIVOT_ROOT": "syscall", + "syscall.SYS_PMC_CONTROL": "syscall", + "syscall.SYS_PMC_GET_INFO": "syscall", + "syscall.SYS_POLL": "syscall", + "syscall.SYS_POLLTS": "syscall", + "syscall.SYS_POLL_NOCANCEL": "syscall", + "syscall.SYS_POSIX_FADVISE": "syscall", + "syscall.SYS_POSIX_FALLOCATE": "syscall", + "syscall.SYS_POSIX_OPENPT": "syscall", + "syscall.SYS_POSIX_SPAWN": "syscall", + "syscall.SYS_PPOLL": "syscall", + "syscall.SYS_PRCTL": "syscall", + "syscall.SYS_PREAD": "syscall", + "syscall.SYS_PREAD64": "syscall", + "syscall.SYS_PREADV": "syscall", + "syscall.SYS_PREAD_NOCANCEL": "syscall", + "syscall.SYS_PRLIMIT64": "syscall", + "syscall.SYS_PROCESS_POLICY": "syscall", + "syscall.SYS_PROCESS_VM_READV": "syscall", + "syscall.SYS_PROCESS_VM_WRITEV": "syscall", + "syscall.SYS_PROC_INFO": "syscall", + "syscall.SYS_PROF": "syscall", + "syscall.SYS_PROFIL": "syscall", + "syscall.SYS_PSELECT": "syscall", + "syscall.SYS_PSELECT6": "syscall", + "syscall.SYS_PSET_ASSIGN": "syscall", + "syscall.SYS_PSET_CREATE": "syscall", + "syscall.SYS_PSET_DESTROY": "syscall", + "syscall.SYS_PSYNCH_CVBROAD": "syscall", + "syscall.SYS_PSYNCH_CVCLRPREPOST": "syscall", + "syscall.SYS_PSYNCH_CVSIGNAL": "syscall", + "syscall.SYS_PSYNCH_CVWAIT": "syscall", + "syscall.SYS_PSYNCH_MUTEXDROP": "syscall", + "syscall.SYS_PSYNCH_MUTEXWAIT": "syscall", + "syscall.SYS_PSYNCH_RW_DOWNGRADE": "syscall", + "syscall.SYS_PSYNCH_RW_LONGRDLOCK": "syscall", + "syscall.SYS_PSYNCH_RW_RDLOCK": "syscall", + "syscall.SYS_PSYNCH_RW_UNLOCK": "syscall", + "syscall.SYS_PSYNCH_RW_UNLOCK2": "syscall", + "syscall.SYS_PSYNCH_RW_UPGRADE": "syscall", + "syscall.SYS_PSYNCH_RW_WRLOCK": "syscall", + "syscall.SYS_PSYNCH_RW_YIELDWRLOCK": "syscall", + "syscall.SYS_PTRACE": "syscall", + "syscall.SYS_PUTPMSG": "syscall", + "syscall.SYS_PWRITE": "syscall", + "syscall.SYS_PWRITE64": "syscall", + "syscall.SYS_PWRITEV": "syscall", + "syscall.SYS_PWRITE_NOCANCEL": "syscall", + "syscall.SYS_QUERY_MODULE": "syscall", + "syscall.SYS_QUOTACTL": "syscall", + "syscall.SYS_RASCTL": "syscall", + "syscall.SYS_RCTL_ADD_RULE": "syscall", + "syscall.SYS_RCTL_GET_LIMITS": "syscall", + "syscall.SYS_RCTL_GET_RACCT": "syscall", + "syscall.SYS_RCTL_GET_RULES": "syscall", + "syscall.SYS_RCTL_REMOVE_RULE": "syscall", + "syscall.SYS_READ": "syscall", + "syscall.SYS_READAHEAD": "syscall", + "syscall.SYS_READDIR": "syscall", + "syscall.SYS_READLINK": "syscall", + "syscall.SYS_READLINKAT": "syscall", + "syscall.SYS_READV": "syscall", + "syscall.SYS_READV_NOCANCEL": "syscall", + "syscall.SYS_READ_NOCANCEL": "syscall", + "syscall.SYS_REBOOT": "syscall", + "syscall.SYS_RECV": "syscall", + "syscall.SYS_RECVFROM": "syscall", + "syscall.SYS_RECVFROM_NOCANCEL": "syscall", + "syscall.SYS_RECVMMSG": "syscall", + "syscall.SYS_RECVMSG": "syscall", + "syscall.SYS_RECVMSG_NOCANCEL": "syscall", + "syscall.SYS_REMAP_FILE_PAGES": "syscall", + "syscall.SYS_REMOVEXATTR": "syscall", + "syscall.SYS_RENAME": "syscall", + "syscall.SYS_RENAMEAT": "syscall", + "syscall.SYS_REQUEST_KEY": "syscall", + "syscall.SYS_RESTART_SYSCALL": "syscall", + "syscall.SYS_REVOKE": "syscall", + "syscall.SYS_RFORK": "syscall", + "syscall.SYS_RMDIR": "syscall", + "syscall.SYS_RTPRIO": "syscall", + "syscall.SYS_RTPRIO_THREAD": "syscall", + "syscall.SYS_RT_SIGACTION": "syscall", + "syscall.SYS_RT_SIGPENDING": "syscall", + "syscall.SYS_RT_SIGPROCMASK": "syscall", + "syscall.SYS_RT_SIGQUEUEINFO": "syscall", + "syscall.SYS_RT_SIGRETURN": "syscall", + "syscall.SYS_RT_SIGSUSPEND": "syscall", + "syscall.SYS_RT_SIGTIMEDWAIT": "syscall", + "syscall.SYS_RT_TGSIGQUEUEINFO": "syscall", + "syscall.SYS_SBRK": "syscall", + "syscall.SYS_SCHED_GETAFFINITY": "syscall", + "syscall.SYS_SCHED_GETPARAM": "syscall", + "syscall.SYS_SCHED_GETSCHEDULER": "syscall", + "syscall.SYS_SCHED_GET_PRIORITY_MAX": "syscall", + "syscall.SYS_SCHED_GET_PRIORITY_MIN": "syscall", + "syscall.SYS_SCHED_RR_GET_INTERVAL": "syscall", + "syscall.SYS_SCHED_SETAFFINITY": "syscall", + "syscall.SYS_SCHED_SETPARAM": "syscall", + "syscall.SYS_SCHED_SETSCHEDULER": "syscall", + "syscall.SYS_SCHED_YIELD": "syscall", + "syscall.SYS_SCTP_GENERIC_RECVMSG": "syscall", + "syscall.SYS_SCTP_GENERIC_SENDMSG": "syscall", + "syscall.SYS_SCTP_GENERIC_SENDMSG_IOV": "syscall", + "syscall.SYS_SCTP_PEELOFF": "syscall", + "syscall.SYS_SEARCHFS": "syscall", + "syscall.SYS_SECURITY": "syscall", + "syscall.SYS_SELECT": "syscall", + "syscall.SYS_SELECT_NOCANCEL": "syscall", + "syscall.SYS_SEMCONFIG": "syscall", + "syscall.SYS_SEMCTL": "syscall", + "syscall.SYS_SEMGET": "syscall", + "syscall.SYS_SEMOP": "syscall", + "syscall.SYS_SEMSYS": "syscall", + "syscall.SYS_SEMTIMEDOP": "syscall", + "syscall.SYS_SEM_CLOSE": "syscall", + "syscall.SYS_SEM_DESTROY": "syscall", + "syscall.SYS_SEM_GETVALUE": "syscall", + "syscall.SYS_SEM_INIT": "syscall", + "syscall.SYS_SEM_OPEN": "syscall", + "syscall.SYS_SEM_POST": "syscall", + "syscall.SYS_SEM_TRYWAIT": "syscall", + "syscall.SYS_SEM_UNLINK": "syscall", + "syscall.SYS_SEM_WAIT": "syscall", + "syscall.SYS_SEM_WAIT_NOCANCEL": "syscall", + "syscall.SYS_SEND": "syscall", + "syscall.SYS_SENDFILE": "syscall", + "syscall.SYS_SENDFILE64": "syscall", + "syscall.SYS_SENDMMSG": "syscall", + "syscall.SYS_SENDMSG": "syscall", + "syscall.SYS_SENDMSG_NOCANCEL": "syscall", + "syscall.SYS_SENDTO": "syscall", + "syscall.SYS_SENDTO_NOCANCEL": "syscall", + "syscall.SYS_SETATTRLIST": "syscall", + "syscall.SYS_SETAUDIT": "syscall", + "syscall.SYS_SETAUDIT_ADDR": "syscall", + "syscall.SYS_SETAUID": "syscall", + "syscall.SYS_SETCONTEXT": "syscall", + "syscall.SYS_SETDOMAINNAME": "syscall", + "syscall.SYS_SETEGID": "syscall", + "syscall.SYS_SETEUID": "syscall", + "syscall.SYS_SETFIB": "syscall", + "syscall.SYS_SETFSGID": "syscall", + "syscall.SYS_SETFSGID32": "syscall", + "syscall.SYS_SETFSUID": "syscall", + "syscall.SYS_SETFSUID32": "syscall", + "syscall.SYS_SETGID": "syscall", + "syscall.SYS_SETGID32": "syscall", + "syscall.SYS_SETGROUPS": "syscall", + "syscall.SYS_SETGROUPS32": "syscall", + "syscall.SYS_SETHOSTNAME": "syscall", + "syscall.SYS_SETITIMER": "syscall", + "syscall.SYS_SETLCID": "syscall", + "syscall.SYS_SETLOGIN": "syscall", + "syscall.SYS_SETLOGINCLASS": "syscall", + "syscall.SYS_SETNS": "syscall", + "syscall.SYS_SETPGID": "syscall", + "syscall.SYS_SETPRIORITY": "syscall", + "syscall.SYS_SETPRIVEXEC": "syscall", + "syscall.SYS_SETREGID": "syscall", + "syscall.SYS_SETREGID32": "syscall", + "syscall.SYS_SETRESGID": "syscall", + "syscall.SYS_SETRESGID32": "syscall", + "syscall.SYS_SETRESUID": "syscall", + "syscall.SYS_SETRESUID32": "syscall", + "syscall.SYS_SETREUID": "syscall", + "syscall.SYS_SETREUID32": "syscall", + "syscall.SYS_SETRLIMIT": "syscall", + "syscall.SYS_SETRTABLE": "syscall", + "syscall.SYS_SETSGROUPS": "syscall", + "syscall.SYS_SETSID": "syscall", + "syscall.SYS_SETSOCKOPT": "syscall", + "syscall.SYS_SETTID": "syscall", + "syscall.SYS_SETTID_WITH_PID": "syscall", + "syscall.SYS_SETTIMEOFDAY": "syscall", + "syscall.SYS_SETUID": "syscall", + "syscall.SYS_SETUID32": "syscall", + "syscall.SYS_SETWGROUPS": "syscall", + "syscall.SYS_SETXATTR": "syscall", + "syscall.SYS_SET_MEMPOLICY": "syscall", + "syscall.SYS_SET_ROBUST_LIST": "syscall", + "syscall.SYS_SET_THREAD_AREA": "syscall", + "syscall.SYS_SET_TID_ADDRESS": "syscall", + "syscall.SYS_SGETMASK": "syscall", + "syscall.SYS_SHARED_REGION_CHECK_NP": "syscall", + "syscall.SYS_SHARED_REGION_MAP_AND_SLIDE_NP": "syscall", + "syscall.SYS_SHMAT": "syscall", + "syscall.SYS_SHMCTL": "syscall", + "syscall.SYS_SHMDT": "syscall", + "syscall.SYS_SHMGET": "syscall", + "syscall.SYS_SHMSYS": "syscall", + "syscall.SYS_SHM_OPEN": "syscall", + "syscall.SYS_SHM_UNLINK": "syscall", + "syscall.SYS_SHUTDOWN": "syscall", + "syscall.SYS_SIGACTION": "syscall", + "syscall.SYS_SIGALTSTACK": "syscall", + "syscall.SYS_SIGNAL": "syscall", + "syscall.SYS_SIGNALFD": "syscall", + "syscall.SYS_SIGNALFD4": "syscall", + "syscall.SYS_SIGPENDING": "syscall", + "syscall.SYS_SIGPROCMASK": "syscall", + "syscall.SYS_SIGQUEUE": "syscall", + "syscall.SYS_SIGQUEUEINFO": "syscall", + "syscall.SYS_SIGRETURN": "syscall", + "syscall.SYS_SIGSUSPEND": "syscall", + "syscall.SYS_SIGSUSPEND_NOCANCEL": "syscall", + "syscall.SYS_SIGTIMEDWAIT": "syscall", + "syscall.SYS_SIGWAIT": "syscall", + "syscall.SYS_SIGWAITINFO": "syscall", + "syscall.SYS_SOCKET": "syscall", + "syscall.SYS_SOCKETCALL": "syscall", + "syscall.SYS_SOCKETPAIR": "syscall", + "syscall.SYS_SPLICE": "syscall", + "syscall.SYS_SSETMASK": "syscall", + "syscall.SYS_SSTK": "syscall", + "syscall.SYS_STACK_SNAPSHOT": "syscall", + "syscall.SYS_STAT": "syscall", + "syscall.SYS_STAT64": "syscall", + "syscall.SYS_STAT64_EXTENDED": "syscall", + "syscall.SYS_STATFS": "syscall", + "syscall.SYS_STATFS64": "syscall", + "syscall.SYS_STATV": "syscall", + "syscall.SYS_STATVFS1": "syscall", + "syscall.SYS_STAT_EXTENDED": "syscall", + "syscall.SYS_STIME": "syscall", + "syscall.SYS_STTY": "syscall", + "syscall.SYS_SWAPCONTEXT": "syscall", + "syscall.SYS_SWAPCTL": "syscall", + "syscall.SYS_SWAPOFF": "syscall", + "syscall.SYS_SWAPON": "syscall", + "syscall.SYS_SYMLINK": "syscall", + "syscall.SYS_SYMLINKAT": "syscall", + "syscall.SYS_SYNC": "syscall", + "syscall.SYS_SYNCFS": "syscall", + "syscall.SYS_SYNC_FILE_RANGE": "syscall", + "syscall.SYS_SYSARCH": "syscall", + "syscall.SYS_SYSCALL": "syscall", + "syscall.SYS_SYSCALL_BASE": "syscall", + "syscall.SYS_SYSFS": "syscall", + "syscall.SYS_SYSINFO": "syscall", + "syscall.SYS_SYSLOG": "syscall", + "syscall.SYS_TEE": "syscall", + "syscall.SYS_TGKILL": "syscall", + "syscall.SYS_THREAD_SELFID": "syscall", + "syscall.SYS_THR_CREATE": "syscall", + "syscall.SYS_THR_EXIT": "syscall", + "syscall.SYS_THR_KILL": "syscall", + "syscall.SYS_THR_KILL2": "syscall", + "syscall.SYS_THR_NEW": "syscall", + "syscall.SYS_THR_SELF": "syscall", + "syscall.SYS_THR_SET_NAME": "syscall", + "syscall.SYS_THR_SUSPEND": "syscall", + "syscall.SYS_THR_WAKE": "syscall", + "syscall.SYS_TIME": "syscall", + "syscall.SYS_TIMERFD_CREATE": "syscall", + "syscall.SYS_TIMERFD_GETTIME": "syscall", + "syscall.SYS_TIMERFD_SETTIME": "syscall", + "syscall.SYS_TIMER_CREATE": "syscall", + "syscall.SYS_TIMER_DELETE": "syscall", + "syscall.SYS_TIMER_GETOVERRUN": "syscall", + "syscall.SYS_TIMER_GETTIME": "syscall", + "syscall.SYS_TIMER_SETTIME": 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"syscall.TokenHasRestrictions": "syscall", + "syscall.TokenImpersonationLevel": "syscall", + "syscall.TokenIntegrityLevel": "syscall", + "syscall.TokenLinkedToken": "syscall", + "syscall.TokenLogonSid": "syscall", + "syscall.TokenMandatoryPolicy": "syscall", + "syscall.TokenOrigin": "syscall", + "syscall.TokenOwner": "syscall", + "syscall.TokenPrimaryGroup": "syscall", + "syscall.TokenPrivileges": "syscall", + "syscall.TokenRestrictedSids": "syscall", + "syscall.TokenSandBoxInert": "syscall", + "syscall.TokenSessionId": "syscall", + "syscall.TokenSessionReference": "syscall", + "syscall.TokenSource": "syscall", + "syscall.TokenStatistics": "syscall", + "syscall.TokenType": "syscall", + "syscall.TokenUIAccess": "syscall", + "syscall.TokenUser": "syscall", + "syscall.TokenVirtualizationAllowed": "syscall", + "syscall.TokenVirtualizationEnabled": "syscall", + "syscall.Tokenprimarygroup": "syscall", + "syscall.Tokenuser": "syscall", + "syscall.TranslateAccountName": "syscall", + "syscall.TranslateName": "syscall", + "syscall.TransmitFile": "syscall", + "syscall.TransmitFileBuffers": "syscall", + "syscall.Truncate": "syscall", + "syscall.USAGE_MATCH_TYPE_AND": "syscall", + "syscall.USAGE_MATCH_TYPE_OR": "syscall", + "syscall.UTF16FromString": "syscall", + "syscall.UTF16PtrFromString": "syscall", + "syscall.UTF16ToString": "syscall", + "syscall.Ucred": "syscall", + "syscall.Umask": "syscall", + "syscall.Uname": "syscall", + "syscall.Undelete": "syscall", + "syscall.UnixCredentials": "syscall", + "syscall.UnixRights": "syscall", + "syscall.Unlink": "syscall", + "syscall.Unlinkat": "syscall", + "syscall.UnmapViewOfFile": "syscall", + "syscall.Unmount": "syscall", + "syscall.Unshare": "syscall", + "syscall.UserInfo10": "syscall", + "syscall.Ustat": "syscall", + "syscall.Ustat_t": "syscall", + "syscall.Utimbuf": "syscall", + "syscall.Utime": "syscall", + "syscall.Utimes": "syscall", + "syscall.UtimesNano": "syscall", + "syscall.Utsname": "syscall", + "syscall.VDISCARD": "syscall", + "syscall.VDSUSP": "syscall", + "syscall.VEOF": "syscall", + "syscall.VEOL": "syscall", + "syscall.VEOL2": "syscall", + "syscall.VERASE": "syscall", + "syscall.VERASE2": "syscall", + "syscall.VINTR": "syscall", + "syscall.VKILL": "syscall", + "syscall.VLNEXT": "syscall", + "syscall.VMIN": "syscall", + "syscall.VQUIT": "syscall", + "syscall.VREPRINT": "syscall", + "syscall.VSTART": "syscall", + "syscall.VSTATUS": "syscall", + "syscall.VSTOP": "syscall", + "syscall.VSUSP": "syscall", + "syscall.VSWTC": "syscall", + "syscall.VT0": "syscall", + "syscall.VT1": "syscall", + "syscall.VTDLY": "syscall", + "syscall.VTIME": "syscall", + "syscall.VWERASE": "syscall", + "syscall.VirtualLock": "syscall", + "syscall.VirtualUnlock": "syscall", + "syscall.WAIT_ABANDONED": "syscall", + "syscall.WAIT_FAILED": "syscall", + "syscall.WAIT_OBJECT_0": "syscall", + "syscall.WAIT_TIMEOUT": "syscall", + "syscall.WALL": "syscall", + "syscall.WALLSIG": "syscall", + "syscall.WALTSIG": "syscall", + "syscall.WCLONE": "syscall", + "syscall.WCONTINUED": "syscall", + "syscall.WCOREFLAG": "syscall", + "syscall.WEXITED": "syscall", + "syscall.WLINUXCLONE": "syscall", + "syscall.WNOHANG": "syscall", + "syscall.WNOTHREAD": "syscall", + "syscall.WNOWAIT": "syscall", + "syscall.WNOZOMBIE": "syscall", + "syscall.WOPTSCHECKED": "syscall", + "syscall.WORDSIZE": "syscall", + "syscall.WSABuf": "syscall", + "syscall.WSACleanup": "syscall", + "syscall.WSADESCRIPTION_LEN": "syscall", + "syscall.WSAData": "syscall", + "syscall.WSAEACCES": "syscall", + "syscall.WSAEnumProtocols": "syscall", + "syscall.WSAID_CONNECTEX": "syscall", + "syscall.WSAIoctl": "syscall", + "syscall.WSAPROTOCOL_LEN": "syscall", + "syscall.WSAProtocolChain": "syscall", + "syscall.WSAProtocolInfo": "syscall", + "syscall.WSARecv": "syscall", + "syscall.WSARecvFrom": "syscall", + "syscall.WSASYS_STATUS_LEN": "syscall", + "syscall.WSASend": "syscall", + "syscall.WSASendTo": "syscall", + "syscall.WSASendto": "syscall", + "syscall.WSAStartup": "syscall", + "syscall.WSTOPPED": "syscall", + "syscall.WTRAPPED": "syscall", + "syscall.WUNTRACED": "syscall", + "syscall.Wait4": "syscall", + "syscall.WaitForSingleObject": "syscall", + "syscall.WaitStatus": "syscall", + "syscall.Win32FileAttributeData": "syscall", + "syscall.Win32finddata": "syscall", + "syscall.Write": "syscall", + "syscall.WriteConsole": "syscall", + "syscall.WriteFile": "syscall", + "syscall.X509_ASN_ENCODING": "syscall", + "syscall.XCASE": "syscall", + "syscall.XP1_CONNECTIONLESS": "syscall", + "syscall.XP1_CONNECT_DATA": "syscall", + "syscall.XP1_DISCONNECT_DATA": "syscall", + "syscall.XP1_EXPEDITED_DATA": "syscall", + "syscall.XP1_GRACEFUL_CLOSE": "syscall", + "syscall.XP1_GUARANTEED_DELIVERY": "syscall", + "syscall.XP1_GUARANTEED_ORDER": "syscall", + "syscall.XP1_IFS_HANDLES": "syscall", + "syscall.XP1_MESSAGE_ORIENTED": "syscall", + "syscall.XP1_MULTIPOINT_CONTROL_PLANE": "syscall", + "syscall.XP1_MULTIPOINT_DATA_PLANE": "syscall", + "syscall.XP1_PARTIAL_MESSAGE": "syscall", + "syscall.XP1_PSEUDO_STREAM": "syscall", + "syscall.XP1_QOS_SUPPORTED": "syscall", + "syscall.XP1_SAN_SUPPORT_SDP": "syscall", + "syscall.XP1_SUPPORT_BROADCAST": "syscall", + "syscall.XP1_SUPPORT_MULTIPOINT": "syscall", + "syscall.XP1_UNI_RECV": "syscall", + "syscall.XP1_UNI_SEND": "syscall", + "syslog.Dial": "log/syslog", + "syslog.LOG_ALERT": "log/syslog", + "syslog.LOG_AUTH": "log/syslog", + "syslog.LOG_AUTHPRIV": "log/syslog", + "syslog.LOG_CRIT": "log/syslog", + "syslog.LOG_CRON": "log/syslog", + "syslog.LOG_DAEMON": "log/syslog", + "syslog.LOG_DEBUG": "log/syslog", + "syslog.LOG_EMERG": "log/syslog", + "syslog.LOG_ERR": "log/syslog", + "syslog.LOG_FTP": "log/syslog", + "syslog.LOG_INFO": "log/syslog", + "syslog.LOG_KERN": "log/syslog", + "syslog.LOG_LOCAL0": "log/syslog", + "syslog.LOG_LOCAL1": "log/syslog", + "syslog.LOG_LOCAL2": "log/syslog", + "syslog.LOG_LOCAL3": "log/syslog", + "syslog.LOG_LOCAL4": "log/syslog", + "syslog.LOG_LOCAL5": "log/syslog", + "syslog.LOG_LOCAL6": "log/syslog", + "syslog.LOG_LOCAL7": "log/syslog", + "syslog.LOG_LPR": "log/syslog", + "syslog.LOG_MAIL": "log/syslog", + "syslog.LOG_NEWS": "log/syslog", + "syslog.LOG_NOTICE": "log/syslog", + "syslog.LOG_SYSLOG": "log/syslog", + "syslog.LOG_USER": "log/syslog", + "syslog.LOG_UUCP": "log/syslog", + "syslog.LOG_WARNING": "log/syslog", + "syslog.New": "log/syslog", + "syslog.NewLogger": "log/syslog", + "syslog.Priority": "log/syslog", + "syslog.Writer": "log/syslog", + "tabwriter.AlignRight": "text/tabwriter", + "tabwriter.Debug": "text/tabwriter", + "tabwriter.DiscardEmptyColumns": "text/tabwriter", + "tabwriter.Escape": "text/tabwriter", + "tabwriter.FilterHTML": "text/tabwriter", + "tabwriter.NewWriter": "text/tabwriter", + "tabwriter.StripEscape": "text/tabwriter", + "tabwriter.TabIndent": "text/tabwriter", + "tabwriter.Writer": "text/tabwriter", + "tar.ErrFieldTooLong": "archive/tar", + "tar.ErrHeader": "archive/tar", + "tar.ErrWriteAfterClose": "archive/tar", + "tar.ErrWriteTooLong": "archive/tar", + "tar.FileInfoHeader": "archive/tar", + "tar.Header": "archive/tar", + "tar.NewReader": "archive/tar", + "tar.NewWriter": "archive/tar", + "tar.Reader": "archive/tar", + "tar.TypeBlock": "archive/tar", + "tar.TypeChar": "archive/tar", + "tar.TypeCont": "archive/tar", + "tar.TypeDir": "archive/tar", + "tar.TypeFifo": "archive/tar", + "tar.TypeGNULongLink": "archive/tar", + "tar.TypeGNULongName": "archive/tar", + "tar.TypeLink": "archive/tar", + "tar.TypeReg": "archive/tar", + "tar.TypeRegA": "archive/tar", + "tar.TypeSymlink": "archive/tar", + "tar.TypeXGlobalHeader": "archive/tar", + "tar.TypeXHeader": "archive/tar", + "tar.Writer": "archive/tar", + "template.CSS": "html/template", + "template.ErrAmbigContext": "html/template", + "template.ErrBadHTML": "html/template", + "template.ErrBranchEnd": "html/template", + "template.ErrEndContext": "html/template", + "template.ErrNoSuchTemplate": "html/template", + "template.ErrOutputContext": "html/template", + "template.ErrPartialCharset": "html/template", + "template.ErrPartialEscape": "html/template", + "template.ErrRangeLoopReentry": "html/template", + "template.ErrSlashAmbig": "html/template", + "template.Error": "html/template", + "template.ErrorCode": "html/template", + // "template.FuncMap" is ambiguous + "template.HTML": "html/template", + "template.HTMLAttr": "html/template", + // "template.HTMLEscape" is ambiguous + // "template.HTMLEscapeString" is ambiguous + // "template.HTMLEscaper" is ambiguous + "template.JS": "html/template", + // "template.JSEscape" is ambiguous + // "template.JSEscapeString" is ambiguous + // "template.JSEscaper" is ambiguous + "template.JSStr": "html/template", + // "template.Must" is ambiguous + // "template.New" is ambiguous + "template.OK": "html/template", + // "template.ParseFiles" is ambiguous + // "template.ParseGlob" is ambiguous + // "template.Template" is ambiguous + "template.URL": "html/template", + // "template.URLQueryEscaper" is ambiguous + "testing.AllocsPerRun": "testing", + "testing.B": "testing", + "testing.Benchmark": "testing", + "testing.BenchmarkResult": "testing", + "testing.Cover": "testing", + "testing.CoverBlock": "testing", + "testing.InternalBenchmark": "testing", + "testing.InternalExample": "testing", + "testing.InternalTest": "testing", + "testing.Main": "testing", + "testing.RegisterCover": "testing", + "testing.RunBenchmarks": "testing", + "testing.RunExamples": "testing", + "testing.RunTests": "testing", + "testing.Short": "testing", + "testing.T": "testing", + "testing.Verbose": "testing", + "textproto.CanonicalMIMEHeaderKey": "net/textproto", + "textproto.Conn": "net/textproto", + "textproto.Dial": "net/textproto", + "textproto.Error": "net/textproto", + "textproto.MIMEHeader": "net/textproto", + "textproto.NewConn": "net/textproto", + "textproto.NewReader": "net/textproto", + "textproto.NewWriter": "net/textproto", + "textproto.Pipeline": "net/textproto", + "textproto.ProtocolError": "net/textproto", + "textproto.Reader": "net/textproto", + "textproto.TrimBytes": "net/textproto", + "textproto.TrimString": "net/textproto", + "textproto.Writer": "net/textproto", + "time.ANSIC": "time", + "time.After": "time", + "time.AfterFunc": "time", + "time.April": "time", + "time.August": "time", + "time.Date": "time", + "time.December": "time", + "time.Duration": "time", + "time.February": "time", + "time.FixedZone": "time", + "time.Friday": "time", + "time.Hour": "time", + "time.January": "time", + "time.July": "time", + "time.June": "time", + "time.Kitchen": "time", + "time.LoadLocation": "time", + "time.Local": "time", + "time.Location": "time", + "time.March": "time", + "time.May": "time", + "time.Microsecond": "time", + "time.Millisecond": "time", + "time.Minute": "time", + "time.Monday": "time", + "time.Month": "time", + "time.Nanosecond": "time", + "time.NewTicker": "time", + "time.NewTimer": "time", + "time.November": "time", + "time.Now": "time", + "time.October": "time", + "time.Parse": "time", + "time.ParseDuration": "time", + "time.ParseError": "time", + "time.ParseInLocation": "time", + "time.RFC1123": "time", + "time.RFC1123Z": "time", + "time.RFC3339": "time", + "time.RFC3339Nano": "time", + "time.RFC822": "time", + "time.RFC822Z": "time", + "time.RFC850": "time", + "time.RubyDate": "time", + "time.Saturday": "time", + "time.Second": "time", + "time.September": "time", + "time.Since": "time", + "time.Sleep": "time", + "time.Stamp": "time", + "time.StampMicro": "time", + "time.StampMilli": "time", + "time.StampNano": "time", + "time.Sunday": "time", + "time.Thursday": "time", + "time.Tick": "time", + "time.Ticker": "time", + "time.Time": "time", + "time.Timer": "time", + "time.Tuesday": "time", + "time.UTC": "time", + "time.Unix": "time", + "time.UnixDate": "time", + "time.Wednesday": "time", + "time.Weekday": "time", + "tls.Certificate": "crypto/tls", + "tls.Client": "crypto/tls", + "tls.ClientAuthType": "crypto/tls", + "tls.Config": "crypto/tls", + "tls.Conn": "crypto/tls", + "tls.ConnectionState": "crypto/tls", + "tls.Dial": "crypto/tls", + "tls.Listen": "crypto/tls", + "tls.LoadX509KeyPair": "crypto/tls", + "tls.NewListener": "crypto/tls", + "tls.NoClientCert": "crypto/tls", + "tls.RequestClientCert": "crypto/tls", + "tls.RequireAndVerifyClientCert": "crypto/tls", + "tls.RequireAnyClientCert": "crypto/tls", + "tls.Server": "crypto/tls", + "tls.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA": "crypto/tls", + "tls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256": "crypto/tls", + "tls.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA": "crypto/tls", + "tls.TLS_ECDHE_ECDSA_WITH_RC4_128_SHA": "crypto/tls", + "tls.TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA": "crypto/tls", + "tls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA": "crypto/tls", + "tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256": "crypto/tls", + "tls.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA": "crypto/tls", + "tls.TLS_ECDHE_RSA_WITH_RC4_128_SHA": "crypto/tls", + "tls.TLS_RSA_WITH_3DES_EDE_CBC_SHA": "crypto/tls", + "tls.TLS_RSA_WITH_AES_128_CBC_SHA": "crypto/tls", + "tls.TLS_RSA_WITH_AES_256_CBC_SHA": "crypto/tls", + "tls.TLS_RSA_WITH_RC4_128_SHA": "crypto/tls", + "tls.VerifyClientCertIfGiven": "crypto/tls", + "tls.VersionSSL30": "crypto/tls", + "tls.VersionTLS10": "crypto/tls", + "tls.VersionTLS11": "crypto/tls", + "tls.VersionTLS12": "crypto/tls", + "tls.X509KeyPair": "crypto/tls", + "token.ADD": "go/token", + "token.ADD_ASSIGN": "go/token", + "token.AND": "go/token", + "token.AND_ASSIGN": "go/token", + "token.AND_NOT": "go/token", + "token.AND_NOT_ASSIGN": "go/token", + "token.ARROW": "go/token", + "token.ASSIGN": "go/token", + "token.BREAK": "go/token", + "token.CASE": "go/token", + "token.CHAN": "go/token", + "token.CHAR": "go/token", + "token.COLON": "go/token", + "token.COMMA": "go/token", + "token.COMMENT": "go/token", + "token.CONST": "go/token", + "token.CONTINUE": "go/token", + "token.DEC": "go/token", + "token.DEFAULT": "go/token", + "token.DEFER": "go/token", + "token.DEFINE": "go/token", + "token.ELLIPSIS": "go/token", + "token.ELSE": "go/token", + "token.EOF": "go/token", + "token.EQL": "go/token", + "token.FALLTHROUGH": "go/token", + "token.FLOAT": "go/token", + "token.FOR": "go/token", + "token.FUNC": "go/token", + "token.File": "go/token", + "token.FileSet": "go/token", + "token.GEQ": "go/token", + "token.GO": "go/token", + "token.GOTO": "go/token", + "token.GTR": "go/token", + "token.HighestPrec": "go/token", + "token.IDENT": "go/token", + "token.IF": "go/token", + "token.ILLEGAL": "go/token", + "token.IMAG": "go/token", + "token.IMPORT": "go/token", + "token.INC": "go/token", + "token.INT": "go/token", + "token.INTERFACE": "go/token", + "token.LAND": "go/token", + "token.LBRACE": "go/token", + "token.LBRACK": "go/token", + "token.LEQ": "go/token", + "token.LOR": "go/token", + "token.LPAREN": "go/token", + "token.LSS": "go/token", + "token.Lookup": "go/token", + "token.LowestPrec": "go/token", + "token.MAP": "go/token", + "token.MUL": "go/token", + "token.MUL_ASSIGN": "go/token", + "token.NEQ": "go/token", + "token.NOT": "go/token", + "token.NewFileSet": "go/token", + "token.NoPos": "go/token", + "token.OR": "go/token", + "token.OR_ASSIGN": "go/token", + "token.PACKAGE": "go/token", + "token.PERIOD": "go/token", + "token.Pos": "go/token", + "token.Position": "go/token", + "token.QUO": "go/token", + "token.QUO_ASSIGN": "go/token", + "token.RANGE": "go/token", + "token.RBRACE": "go/token", + "token.RBRACK": "go/token", + "token.REM": "go/token", + "token.REM_ASSIGN": "go/token", + "token.RETURN": "go/token", + "token.RPAREN": "go/token", + "token.SELECT": "go/token", + "token.SEMICOLON": "go/token", + "token.SHL": "go/token", + "token.SHL_ASSIGN": "go/token", + "token.SHR": "go/token", + "token.SHR_ASSIGN": "go/token", + "token.STRING": "go/token", + "token.STRUCT": "go/token", + "token.SUB": "go/token", + "token.SUB_ASSIGN": "go/token", + "token.SWITCH": "go/token", + "token.TYPE": "go/token", + "token.Token": "go/token", + "token.UnaryPrec": "go/token", + "token.VAR": "go/token", + "token.XOR": "go/token", + "token.XOR_ASSIGN": "go/token", + "unicode.ASCII_Hex_Digit": "unicode", + "unicode.Arabic": "unicode", + "unicode.Armenian": "unicode", + "unicode.Avestan": "unicode", + "unicode.AzeriCase": "unicode", + "unicode.Balinese": "unicode", + "unicode.Bamum": "unicode", + "unicode.Batak": "unicode", + "unicode.Bengali": "unicode", + "unicode.Bidi_Control": "unicode", + "unicode.Bopomofo": "unicode", + "unicode.Brahmi": "unicode", + "unicode.Braille": "unicode", + "unicode.Buginese": "unicode", + "unicode.Buhid": "unicode", + "unicode.C": "unicode", + "unicode.Canadian_Aboriginal": "unicode", + "unicode.Carian": "unicode", + "unicode.CaseRange": "unicode", + "unicode.CaseRanges": "unicode", + "unicode.Categories": "unicode", + "unicode.Cc": "unicode", + "unicode.Cf": "unicode", + "unicode.Chakma": "unicode", + "unicode.Cham": "unicode", + "unicode.Cherokee": "unicode", + "unicode.Co": "unicode", + "unicode.Common": "unicode", + "unicode.Coptic": "unicode", + "unicode.Cs": "unicode", + "unicode.Cuneiform": "unicode", + "unicode.Cypriot": "unicode", + "unicode.Cyrillic": "unicode", + "unicode.Dash": "unicode", + "unicode.Deprecated": "unicode", + "unicode.Deseret": "unicode", + "unicode.Devanagari": "unicode", + "unicode.Diacritic": "unicode", + "unicode.Digit": "unicode", + "unicode.Egyptian_Hieroglyphs": "unicode", + "unicode.Ethiopic": "unicode", + "unicode.Extender": "unicode", + "unicode.FoldCategory": "unicode", + "unicode.FoldScript": "unicode", + "unicode.Georgian": "unicode", + "unicode.Glagolitic": "unicode", + "unicode.Gothic": "unicode", + "unicode.GraphicRanges": "unicode", + "unicode.Greek": "unicode", + "unicode.Gujarati": "unicode", + "unicode.Gurmukhi": "unicode", + "unicode.Han": "unicode", + "unicode.Hangul": "unicode", + "unicode.Hanunoo": "unicode", + "unicode.Hebrew": "unicode", + "unicode.Hex_Digit": "unicode", + "unicode.Hiragana": "unicode", + "unicode.Hyphen": "unicode", + "unicode.IDS_Binary_Operator": "unicode", + "unicode.IDS_Trinary_Operator": "unicode", + "unicode.Ideographic": "unicode", + "unicode.Imperial_Aramaic": "unicode", + "unicode.In": "unicode", + "unicode.Inherited": "unicode", + "unicode.Inscriptional_Pahlavi": "unicode", + "unicode.Inscriptional_Parthian": "unicode", + "unicode.Is": "unicode", + "unicode.IsControl": "unicode", + "unicode.IsDigit": "unicode", + "unicode.IsGraphic": "unicode", + "unicode.IsLetter": "unicode", + "unicode.IsLower": "unicode", + "unicode.IsMark": "unicode", + "unicode.IsNumber": "unicode", + "unicode.IsOneOf": "unicode", + "unicode.IsPrint": "unicode", + "unicode.IsPunct": "unicode", + "unicode.IsSpace": "unicode", + "unicode.IsSymbol": "unicode", + "unicode.IsTitle": "unicode", + "unicode.IsUpper": "unicode", + "unicode.Javanese": "unicode", + "unicode.Join_Control": "unicode", + "unicode.Kaithi": "unicode", + "unicode.Kannada": "unicode", + "unicode.Katakana": "unicode", + "unicode.Kayah_Li": "unicode", + "unicode.Kharoshthi": "unicode", + "unicode.Khmer": "unicode", + "unicode.L": "unicode", + "unicode.Lao": "unicode", + "unicode.Latin": "unicode", + "unicode.Lepcha": "unicode", + "unicode.Letter": "unicode", + "unicode.Limbu": "unicode", + "unicode.Linear_B": "unicode", + "unicode.Lisu": "unicode", + "unicode.Ll": "unicode", + "unicode.Lm": "unicode", + "unicode.Lo": "unicode", + "unicode.Logical_Order_Exception": "unicode", + "unicode.Lower": "unicode", + "unicode.LowerCase": "unicode", + "unicode.Lt": "unicode", + "unicode.Lu": "unicode", + "unicode.Lycian": "unicode", + "unicode.Lydian": "unicode", + "unicode.M": "unicode", + "unicode.Malayalam": "unicode", + "unicode.Mandaic": "unicode", + "unicode.Mark": "unicode", + "unicode.MaxASCII": "unicode", + "unicode.MaxCase": "unicode", + "unicode.MaxLatin1": "unicode", + "unicode.MaxRune": "unicode", + "unicode.Mc": "unicode", + "unicode.Me": "unicode", + "unicode.Meetei_Mayek": "unicode", + "unicode.Meroitic_Cursive": "unicode", + "unicode.Meroitic_Hieroglyphs": "unicode", + "unicode.Miao": "unicode", + "unicode.Mn": "unicode", + "unicode.Mongolian": "unicode", + "unicode.Myanmar": "unicode", + "unicode.N": "unicode", + "unicode.Nd": "unicode", + "unicode.New_Tai_Lue": "unicode", + "unicode.Nko": "unicode", + "unicode.Nl": "unicode", + "unicode.No": "unicode", + "unicode.Noncharacter_Code_Point": "unicode", + "unicode.Number": "unicode", + "unicode.Ogham": "unicode", + "unicode.Ol_Chiki": "unicode", + "unicode.Old_Italic": "unicode", + "unicode.Old_Persian": "unicode", + "unicode.Old_South_Arabian": "unicode", + "unicode.Old_Turkic": "unicode", + "unicode.Oriya": "unicode", + "unicode.Osmanya": "unicode", + "unicode.Other": "unicode", + "unicode.Other_Alphabetic": "unicode", + "unicode.Other_Default_Ignorable_Code_Point": "unicode", + "unicode.Other_Grapheme_Extend": "unicode", + "unicode.Other_ID_Continue": "unicode", + "unicode.Other_ID_Start": "unicode", + "unicode.Other_Lowercase": "unicode", + "unicode.Other_Math": "unicode", + "unicode.Other_Uppercase": "unicode", + "unicode.P": "unicode", + "unicode.Pattern_Syntax": "unicode", + "unicode.Pattern_White_Space": "unicode", + "unicode.Pc": "unicode", + "unicode.Pd": "unicode", + "unicode.Pe": "unicode", + "unicode.Pf": "unicode", + "unicode.Phags_Pa": "unicode", + "unicode.Phoenician": "unicode", + "unicode.Pi": "unicode", + "unicode.Po": "unicode", + "unicode.PrintRanges": "unicode", + "unicode.Properties": "unicode", + "unicode.Ps": "unicode", + "unicode.Punct": "unicode", + "unicode.Quotation_Mark": "unicode", + "unicode.Radical": "unicode", + "unicode.Range16": "unicode", + "unicode.Range32": "unicode", + "unicode.RangeTable": "unicode", + "unicode.Rejang": "unicode", + "unicode.ReplacementChar": "unicode", + "unicode.Runic": "unicode", + "unicode.S": "unicode", + "unicode.STerm": "unicode", + "unicode.Samaritan": "unicode", + "unicode.Saurashtra": "unicode", + "unicode.Sc": "unicode", + "unicode.Scripts": "unicode", + "unicode.Sharada": "unicode", + "unicode.Shavian": "unicode", + "unicode.SimpleFold": "unicode", + "unicode.Sinhala": "unicode", + "unicode.Sk": "unicode", + "unicode.Sm": "unicode", + "unicode.So": "unicode", + "unicode.Soft_Dotted": "unicode", + "unicode.Sora_Sompeng": "unicode", + "unicode.Space": "unicode", + "unicode.SpecialCase": "unicode", + "unicode.Sundanese": "unicode", + "unicode.Syloti_Nagri": "unicode", + "unicode.Symbol": "unicode", + "unicode.Syriac": "unicode", + "unicode.Tagalog": "unicode", + "unicode.Tagbanwa": "unicode", + "unicode.Tai_Le": "unicode", + "unicode.Tai_Tham": "unicode", + "unicode.Tai_Viet": "unicode", + "unicode.Takri": "unicode", + "unicode.Tamil": "unicode", + "unicode.Telugu": "unicode", + "unicode.Terminal_Punctuation": "unicode", + "unicode.Thaana": "unicode", + "unicode.Thai": "unicode", + "unicode.Tibetan": "unicode", + "unicode.Tifinagh": "unicode", + "unicode.Title": "unicode", + "unicode.TitleCase": "unicode", + "unicode.To": "unicode", + "unicode.ToLower": "unicode", + "unicode.ToTitle": "unicode", + "unicode.ToUpper": "unicode", + "unicode.TurkishCase": "unicode", + "unicode.Ugaritic": "unicode", + "unicode.Unified_Ideograph": "unicode", + "unicode.Upper": "unicode", + "unicode.UpperCase": "unicode", + "unicode.UpperLower": "unicode", + "unicode.Vai": "unicode", + "unicode.Variation_Selector": "unicode", + "unicode.Version": "unicode", + "unicode.White_Space": "unicode", + "unicode.Yi": "unicode", + "unicode.Z": "unicode", + "unicode.Zl": "unicode", + "unicode.Zp": "unicode", + "unicode.Zs": "unicode", + "url.Error": "net/url", + "url.EscapeError": "net/url", + "url.Parse": "net/url", + "url.ParseQuery": "net/url", + "url.ParseRequestURI": "net/url", + "url.QueryEscape": "net/url", + "url.QueryUnescape": "net/url", + "url.URL": "net/url", + "url.User": "net/url", + "url.UserPassword": "net/url", + "url.Userinfo": "net/url", + "url.Values": "net/url", + "user.Current": "os/user", + "user.Lookup": "os/user", + "user.LookupId": "os/user", + "user.UnknownUserError": "os/user", + "user.UnknownUserIdError": "os/user", + "user.User": "os/user", + "utf16.Decode": "unicode/utf16", + "utf16.DecodeRune": "unicode/utf16", + "utf16.Encode": "unicode/utf16", + "utf16.EncodeRune": "unicode/utf16", + "utf16.IsSurrogate": "unicode/utf16", + "utf8.DecodeLastRune": "unicode/utf8", + "utf8.DecodeLastRuneInString": "unicode/utf8", + "utf8.DecodeRune": "unicode/utf8", + "utf8.DecodeRuneInString": "unicode/utf8", + "utf8.EncodeRune": "unicode/utf8", + "utf8.FullRune": "unicode/utf8", + "utf8.FullRuneInString": "unicode/utf8", + "utf8.MaxRune": "unicode/utf8", + "utf8.RuneCount": "unicode/utf8", + "utf8.RuneCountInString": "unicode/utf8", + "utf8.RuneError": "unicode/utf8", + "utf8.RuneLen": "unicode/utf8", + "utf8.RuneSelf": "unicode/utf8", + "utf8.RuneStart": "unicode/utf8", + "utf8.UTFMax": "unicode/utf8", + "utf8.Valid": "unicode/utf8", + "utf8.ValidRune": "unicode/utf8", + "utf8.ValidString": "unicode/utf8", + "x509.CANotAuthorizedForThisName": "crypto/x509", + "x509.CertPool": "crypto/x509", + "x509.Certificate": "crypto/x509", + "x509.CertificateInvalidError": "crypto/x509", + "x509.ConstraintViolationError": "crypto/x509", + "x509.CreateCertificate": "crypto/x509", + "x509.DSA": "crypto/x509", + "x509.DSAWithSHA1": "crypto/x509", + "x509.DSAWithSHA256": "crypto/x509", + "x509.DecryptPEMBlock": "crypto/x509", + "x509.ECDSA": "crypto/x509", + "x509.ECDSAWithSHA1": "crypto/x509", + "x509.ECDSAWithSHA256": "crypto/x509", + "x509.ECDSAWithSHA384": "crypto/x509", + "x509.ECDSAWithSHA512": "crypto/x509", + "x509.EncryptPEMBlock": "crypto/x509", + "x509.ErrUnsupportedAlgorithm": "crypto/x509", + "x509.Expired": "crypto/x509", + "x509.ExtKeyUsage": "crypto/x509", + "x509.ExtKeyUsageAny": "crypto/x509", + "x509.ExtKeyUsageClientAuth": "crypto/x509", + "x509.ExtKeyUsageCodeSigning": "crypto/x509", + "x509.ExtKeyUsageEmailProtection": "crypto/x509", + "x509.ExtKeyUsageIPSECEndSystem": "crypto/x509", + "x509.ExtKeyUsageIPSECTunnel": "crypto/x509", + "x509.ExtKeyUsageIPSECUser": "crypto/x509", + "x509.ExtKeyUsageMicrosoftServerGatedCrypto": "crypto/x509", + "x509.ExtKeyUsageNetscapeServerGatedCrypto": "crypto/x509", + "x509.ExtKeyUsageOCSPSigning": "crypto/x509", + "x509.ExtKeyUsageServerAuth": "crypto/x509", + "x509.ExtKeyUsageTimeStamping": "crypto/x509", + "x509.HostnameError": "crypto/x509", + "x509.IncompatibleUsage": "crypto/x509", + "x509.IncorrectPasswordError": "crypto/x509", + "x509.InvalidReason": "crypto/x509", + "x509.IsEncryptedPEMBlock": "crypto/x509", + "x509.KeyUsage": "crypto/x509", + "x509.KeyUsageCRLSign": "crypto/x509", + "x509.KeyUsageCertSign": "crypto/x509", + "x509.KeyUsageContentCommitment": "crypto/x509", + "x509.KeyUsageDataEncipherment": "crypto/x509", + "x509.KeyUsageDecipherOnly": "crypto/x509", + "x509.KeyUsageDigitalSignature": "crypto/x509", + "x509.KeyUsageEncipherOnly": "crypto/x509", + "x509.KeyUsageKeyAgreement": "crypto/x509", + "x509.KeyUsageKeyEncipherment": "crypto/x509", + "x509.MD2WithRSA": "crypto/x509", + "x509.MD5WithRSA": "crypto/x509", + "x509.MarshalECPrivateKey": "crypto/x509", + "x509.MarshalPKCS1PrivateKey": "crypto/x509", + "x509.MarshalPKIXPublicKey": "crypto/x509", + "x509.NewCertPool": "crypto/x509", + "x509.NotAuthorizedToSign": "crypto/x509", + "x509.PEMCipher": "crypto/x509", + "x509.PEMCipher3DES": "crypto/x509", + "x509.PEMCipherAES128": "crypto/x509", + "x509.PEMCipherAES192": "crypto/x509", + "x509.PEMCipherAES256": "crypto/x509", + "x509.PEMCipherDES": "crypto/x509", + "x509.ParseCRL": "crypto/x509", + "x509.ParseCertificate": "crypto/x509", + "x509.ParseCertificates": "crypto/x509", + "x509.ParseDERCRL": "crypto/x509", + "x509.ParseECPrivateKey": "crypto/x509", + "x509.ParsePKCS1PrivateKey": "crypto/x509", + "x509.ParsePKCS8PrivateKey": "crypto/x509", + "x509.ParsePKIXPublicKey": "crypto/x509", + "x509.PublicKeyAlgorithm": "crypto/x509", + "x509.RSA": "crypto/x509", + "x509.SHA1WithRSA": "crypto/x509", + "x509.SHA256WithRSA": "crypto/x509", + "x509.SHA384WithRSA": "crypto/x509", + "x509.SHA512WithRSA": "crypto/x509", + "x509.SignatureAlgorithm": "crypto/x509", + "x509.SystemRootsError": "crypto/x509", + "x509.TooManyIntermediates": "crypto/x509", + "x509.UnhandledCriticalExtension": "crypto/x509", + "x509.UnknownAuthorityError": "crypto/x509", + "x509.UnknownPublicKeyAlgorithm": "crypto/x509", + "x509.UnknownSignatureAlgorithm": "crypto/x509", + "x509.VerifyOptions": "crypto/x509", + "xml.Attr": "encoding/xml", + "xml.CharData": "encoding/xml", + "xml.Comment": "encoding/xml", + "xml.CopyToken": "encoding/xml", + "xml.Decoder": "encoding/xml", + "xml.Directive": "encoding/xml", + "xml.Encoder": "encoding/xml", + "xml.EndElement": "encoding/xml", + "xml.Escape": "encoding/xml", + "xml.EscapeText": "encoding/xml", + "xml.HTMLAutoClose": "encoding/xml", + "xml.HTMLEntity": "encoding/xml", + "xml.Header": "encoding/xml", + "xml.Marshal": "encoding/xml", + "xml.MarshalIndent": "encoding/xml", + "xml.Marshaler": "encoding/xml", + "xml.MarshalerAttr": "encoding/xml", + "xml.Name": "encoding/xml", + "xml.NewDecoder": "encoding/xml", + "xml.NewEncoder": "encoding/xml", + "xml.ProcInst": "encoding/xml", + "xml.StartElement": "encoding/xml", + "xml.SyntaxError": "encoding/xml", + "xml.TagPathError": "encoding/xml", + "xml.Token": "encoding/xml", + "xml.Unmarshal": "encoding/xml", + "xml.UnmarshalError": "encoding/xml", + "xml.Unmarshaler": "encoding/xml", + "xml.UnmarshalerAttr": "encoding/xml", + "xml.UnsupportedTypeError": "encoding/xml", + "zip.Compressor": "archive/zip", + "zip.Decompressor": "archive/zip", + "zip.Deflate": "archive/zip", + "zip.ErrAlgorithm": "archive/zip", + "zip.ErrChecksum": "archive/zip", + "zip.ErrFormat": "archive/zip", + "zip.File": "archive/zip", + "zip.FileHeader": "archive/zip", + "zip.FileInfoHeader": "archive/zip", + "zip.NewReader": "archive/zip", + "zip.NewWriter": "archive/zip", + "zip.OpenReader": "archive/zip", + "zip.ReadCloser": "archive/zip", + "zip.Reader": "archive/zip", + "zip.RegisterCompressor": "archive/zip", + "zip.RegisterDecompressor": "archive/zip", + "zip.Store": "archive/zip", + "zip.Writer": "archive/zip", + "zlib.BestCompression": "compress/zlib", + "zlib.BestSpeed": "compress/zlib", + "zlib.DefaultCompression": "compress/zlib", + "zlib.ErrChecksum": "compress/zlib", + "zlib.ErrDictionary": "compress/zlib", + "zlib.ErrHeader": "compress/zlib", + "zlib.NewReader": "compress/zlib", + "zlib.NewReaderDict": "compress/zlib", + "zlib.NewWriter": "compress/zlib", + "zlib.NewWriterLevel": "compress/zlib", + "zlib.NewWriterLevelDict": "compress/zlib", + "zlib.NoCompression": "compress/zlib", + "zlib.Writer": "compress/zlib", +} diff --git a/vendor/golang.org/x/tools/oracle/TODO b/vendor/golang.org/x/tools/oracle/TODO new file mode 100644 index 0000000..8fbf5e8 --- /dev/null +++ b/vendor/golang.org/x/tools/oracle/TODO @@ -0,0 +1,83 @@ + + +ORACLE TODO +=========== + +General +======= + +Save unsaved editor buffers into an archive and provide that to the +tools, which should act as if they were saved. + +Include complete pos/end information Serial output. + But beware that sometimes a single token (e.g. +) is more helpful + than the pos/end of the containing expression (e.g. x \n + \n y). + +Specific queries +================ + +callers, callees + + Use a type-based (e.g. RTA) callgraph when a callers/callees query is + outside the analysis scope. + +implements + + Make it require that the selection is a type, and show only the + implements relation as it applies to that type. + +definition, referrers + + definition: Make it work with qualified identifiers (SelectorExpr) too. + + references: Make it work on things that are implicit idents, like + import specs, perhaps? + +what + + Report def/ref info if available. + Editors could use it to highlight all idents of the same local var. + + More tests. + +pointsto + + When invoked on a function Ident, we get an error. + + When invoked on a named return parameter, we get an error. + +describe + + When invoked on a var, we want to see the type and its methods. + + Split "show type" and "describe syntax" into separate commands? + +peers + + Permit querying from a makechan, for...range, or reflective op. + + Report aliasing reflect.{Send,Recv,Close} and close() operations. + +New queries + +"updaters": show all statements that may update the selected lvalue + (local, global, field, etc). + +"creators": show all places where an object of type T is created + (&T{}, var t T, new(T), new(struct{array [3]T}), etc. + (Useful for datatypes whose zero value is not safe) + + +Editor-specific +=============== + +Add support for "what" to .el; clean up. + +Emacs: use JSON to get the raw information from the oracle. Don't + open an editor buffer for simpler queries, just jump to the result + and/or display it in the modeline. + +Emacs: go-root-and-paths depends on the current buffer, so be sure to + call it from within the source file, not the *go-oracle* buffer: + the user may have switched workspaces and the oracle should run in + the new one. diff --git a/vendor/golang.org/x/tools/oracle/callees.go b/vendor/golang.org/x/tools/oracle/callees.go new file mode 100644 index 0000000..56e45e1 --- /dev/null +++ b/vendor/golang.org/x/tools/oracle/callees.go @@ -0,0 +1,253 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package oracle + +import ( + "fmt" + "go/ast" + "go/token" + "sort" + + "golang.org/x/tools/go/loader" + "golang.org/x/tools/go/pointer" + "golang.org/x/tools/go/ssa" + "golang.org/x/tools/go/ssa/ssautil" + "golang.org/x/tools/go/types" + "golang.org/x/tools/oracle/serial" +) + +// Callees reports the possible callees of the function call site +// identified by the specified source location. +func callees(q *Query) error { + lconf := loader.Config{Build: q.Build} + + if err := setPTAScope(&lconf, q.Scope); err != nil { + return err + } + + // Load/parse/type-check the program. + lprog, err := lconf.Load() + if err != nil { + return err + } + q.Fset = lprog.Fset + + qpos, err := parseQueryPos(lprog, q.Pos, true) // needs exact pos + if err != nil { + return err + } + + // Determine the enclosing call for the specified position. + var e *ast.CallExpr + for _, n := range qpos.path { + if e, _ = n.(*ast.CallExpr); e != nil { + break + } + } + if e == nil { + return fmt.Errorf("there is no function call here") + } + // TODO(adonovan): issue an error if the call is "too far + // away" from the current selection, as this most likely is + // not what the user intended. + + // Reject type conversions. + if qpos.info.Types[e.Fun].IsType() { + return fmt.Errorf("this is a type conversion, not a function call") + } + + // Deal with obviously static calls before constructing SSA form. + // Some static calls may yet require SSA construction, + // e.g. f := func(){}; f(). + switch funexpr := unparen(e.Fun).(type) { + case *ast.Ident: + switch obj := qpos.info.Uses[funexpr].(type) { + case *types.Builtin: + // Reject calls to built-ins. + return fmt.Errorf("this is a call to the built-in '%s' operator", obj.Name()) + case *types.Func: + // This is a static function call + q.result = &calleesTypesResult{ + site: e, + callee: obj, + } + return nil + } + case *ast.SelectorExpr: + sel := qpos.info.Selections[funexpr] + if sel == nil { + // qualified identifier. + // May refer to top level function variable + // or to top level function. + callee := qpos.info.Uses[funexpr.Sel] + if obj, ok := callee.(*types.Func); ok { + q.result = &calleesTypesResult{ + site: e, + callee: obj, + } + return nil + } + } else if sel.Kind() == types.MethodVal { + recvtype := sel.Recv() + if !types.IsInterface(recvtype) { + // static method call + q.result = &calleesTypesResult{ + site: e, + callee: sel.Obj().(*types.Func), + } + return nil + } + } + } + + prog := ssautil.CreateProgram(lprog, ssa.GlobalDebug) + + ptaConfig, err := setupPTA(prog, lprog, q.PTALog, q.Reflection) + if err != nil { + return err + } + + pkg := prog.Package(qpos.info.Pkg) + if pkg == nil { + return fmt.Errorf("no SSA package") + } + + // Defer SSA construction till after errors are reported. + prog.BuildAll() + + // Ascertain calling function and call site. + callerFn := ssa.EnclosingFunction(pkg, qpos.path) + if callerFn == nil { + return fmt.Errorf("no SSA function built for this location (dead code?)") + } + + // Find the call site. + site, err := findCallSite(callerFn, e) + if err != nil { + return err + } + + funcs, err := findCallees(ptaConfig, site) + if err != nil { + return err + } + + q.result = &calleesSSAResult{ + site: site, + funcs: funcs, + } + return nil +} + +func findCallSite(fn *ssa.Function, call *ast.CallExpr) (ssa.CallInstruction, error) { + instr, _ := fn.ValueForExpr(call) + callInstr, _ := instr.(ssa.CallInstruction) + if instr == nil { + return nil, fmt.Errorf("this call site is unreachable in this analysis") + } + return callInstr, nil +} + +func findCallees(conf *pointer.Config, site ssa.CallInstruction) ([]*ssa.Function, error) { + // Avoid running the pointer analysis for static calls. + if callee := site.Common().StaticCallee(); callee != nil { + switch callee.String() { + case "runtime.SetFinalizer", "(reflect.Value).Call": + // The PTA treats calls to these intrinsics as dynamic. + // TODO(adonovan): avoid reliance on PTA internals. + + default: + return []*ssa.Function{callee}, nil // singleton + } + } + + // Dynamic call: use pointer analysis. + conf.BuildCallGraph = true + cg := ptrAnalysis(conf).CallGraph + cg.DeleteSyntheticNodes() + + // Find all call edges from the site. + n := cg.Nodes[site.Parent()] + if n == nil { + return nil, fmt.Errorf("this call site is unreachable in this analysis") + } + calleesMap := make(map[*ssa.Function]bool) + for _, edge := range n.Out { + if edge.Site == site { + calleesMap[edge.Callee.Func] = true + } + } + + // De-duplicate and sort. + funcs := make([]*ssa.Function, 0, len(calleesMap)) + for f := range calleesMap { + funcs = append(funcs, f) + } + sort.Sort(byFuncPos(funcs)) + return funcs, nil +} + +type calleesSSAResult struct { + site ssa.CallInstruction + funcs []*ssa.Function +} + +type calleesTypesResult struct { + site *ast.CallExpr + callee *types.Func +} + +func (r *calleesSSAResult) display(printf printfFunc) { + if len(r.funcs) == 0 { + // dynamic call on a provably nil func/interface + printf(r.site, "%s on nil value", r.site.Common().Description()) + } else { + printf(r.site, "this %s dispatches to:", r.site.Common().Description()) + for _, callee := range r.funcs { + printf(callee, "\t%s", callee) + } + } +} + +func (r *calleesSSAResult) toSerial(res *serial.Result, fset *token.FileSet) { + j := &serial.Callees{ + Pos: fset.Position(r.site.Pos()).String(), + Desc: r.site.Common().Description(), + } + for _, callee := range r.funcs { + j.Callees = append(j.Callees, &serial.CalleesItem{ + Name: callee.String(), + Pos: fset.Position(callee.Pos()).String(), + }) + } + res.Callees = j +} + +func (r *calleesTypesResult) display(printf printfFunc) { + printf(r.site, "this static function call dispatches to:") + printf(r.callee, "\t%s", r.callee.FullName()) +} + +func (r *calleesTypesResult) toSerial(res *serial.Result, fset *token.FileSet) { + j := &serial.Callees{ + Pos: fset.Position(r.site.Pos()).String(), + Desc: "static function call", + } + j.Callees = []*serial.CalleesItem{ + &serial.CalleesItem{ + Name: r.callee.FullName(), + Pos: fset.Position(r.callee.Pos()).String(), + }, + } + res.Callees = j +} + +// NB: byFuncPos is not deterministic across packages since it depends on load order. +// Use lessPos if the tests need it. +type byFuncPos []*ssa.Function + +func (a byFuncPos) Len() int { return len(a) } +func (a byFuncPos) Less(i, j int) bool { return a[i].Pos() < a[j].Pos() } +func (a byFuncPos) Swap(i, j int) { a[i], a[j] = a[j], a[i] } diff --git a/vendor/golang.org/x/tools/oracle/callers.go b/vendor/golang.org/x/tools/oracle/callers.go new file mode 100644 index 0000000..159a403 --- /dev/null +++ b/vendor/golang.org/x/tools/oracle/callers.go @@ -0,0 +1,115 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package oracle + +import ( + "fmt" + "go/token" + + "golang.org/x/tools/go/callgraph" + "golang.org/x/tools/go/loader" + "golang.org/x/tools/go/ssa" + "golang.org/x/tools/go/ssa/ssautil" + "golang.org/x/tools/oracle/serial" +) + +// Callers reports the possible callers of the function +// immediately enclosing the specified source location. +// +func callers(q *Query) error { + lconf := loader.Config{Build: q.Build} + + if err := setPTAScope(&lconf, q.Scope); err != nil { + return err + } + + // Load/parse/type-check the program. + lprog, err := lconf.Load() + if err != nil { + return err + } + q.Fset = lprog.Fset + + qpos, err := parseQueryPos(lprog, q.Pos, false) + if err != nil { + return err + } + + prog := ssautil.CreateProgram(lprog, 0) + + ptaConfig, err := setupPTA(prog, lprog, q.PTALog, q.Reflection) + if err != nil { + return err + } + + pkg := prog.Package(qpos.info.Pkg) + if pkg == nil { + return fmt.Errorf("no SSA package") + } + if !ssa.HasEnclosingFunction(pkg, qpos.path) { + return fmt.Errorf("this position is not inside a function") + } + + // Defer SSA construction till after errors are reported. + prog.BuildAll() + + target := ssa.EnclosingFunction(pkg, qpos.path) + if target == nil { + return fmt.Errorf("no SSA function built for this location (dead code?)") + } + + // TODO(adonovan): opt: if function is never address-taken, skip + // the pointer analysis. Just look for direct calls. This can + // be done in a single pass over the SSA. + + // Run the pointer analysis, recording each + // call found to originate from target. + ptaConfig.BuildCallGraph = true + cg := ptrAnalysis(ptaConfig).CallGraph + cg.DeleteSyntheticNodes() + edges := cg.CreateNode(target).In + // TODO(adonovan): sort + dedup calls to ensure test determinism. + + q.result = &callersResult{ + target: target, + callgraph: cg, + edges: edges, + } + return nil +} + +type callersResult struct { + target *ssa.Function + callgraph *callgraph.Graph + edges []*callgraph.Edge +} + +func (r *callersResult) display(printf printfFunc) { + root := r.callgraph.Root + if r.edges == nil { + printf(r.target, "%s is not reachable in this program.", r.target) + } else { + printf(r.target, "%s is called from these %d sites:", r.target, len(r.edges)) + for _, edge := range r.edges { + if edge.Caller == root { + printf(r.target, "the root of the call graph") + } else { + printf(edge, "\t%s from %s", edge.Description(), edge.Caller.Func) + } + } + } +} + +func (r *callersResult) toSerial(res *serial.Result, fset *token.FileSet) { + var callers []serial.Caller + for _, edge := range r.edges { + callers = append(callers, serial.Caller{ + Caller: edge.Caller.Func.String(), + Pos: fset.Position(edge.Pos()).String(), + Desc: edge.Description(), + }) + } + res.Callers = callers +} diff --git a/vendor/golang.org/x/tools/oracle/callstack.go b/vendor/golang.org/x/tools/oracle/callstack.go new file mode 100644 index 0000000..6f04b60 --- /dev/null +++ b/vendor/golang.org/x/tools/oracle/callstack.go @@ -0,0 +1,126 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package oracle + +import ( + "fmt" + "go/token" + + "golang.org/x/tools/go/callgraph" + "golang.org/x/tools/go/loader" + "golang.org/x/tools/go/ssa" + "golang.org/x/tools/go/ssa/ssautil" + "golang.org/x/tools/oracle/serial" +) + +// Callstack displays an arbitrary path from a root of the callgraph +// to the function at the current position. +// +// The information may be misleading in a context-insensitive +// analysis. e.g. the call path X->Y->Z might be infeasible if Y never +// calls Z when it is called from X. TODO(adonovan): think about UI. +// +// TODO(adonovan): permit user to specify a starting point other than +// the analysis root. +// +func callstack(q *Query) error { + fset := token.NewFileSet() + lconf := loader.Config{Fset: fset, Build: q.Build} + + if err := setPTAScope(&lconf, q.Scope); err != nil { + return err + } + + // Load/parse/type-check the program. + lprog, err := lconf.Load() + if err != nil { + return err + } + + qpos, err := parseQueryPos(lprog, q.Pos, false) + if err != nil { + return err + } + + prog := ssautil.CreateProgram(lprog, 0) + + ptaConfig, err := setupPTA(prog, lprog, q.PTALog, q.Reflection) + if err != nil { + return err + } + + pkg := prog.Package(qpos.info.Pkg) + if pkg == nil { + return fmt.Errorf("no SSA package") + } + + if !ssa.HasEnclosingFunction(pkg, qpos.path) { + return fmt.Errorf("this position is not inside a function") + } + + // Defer SSA construction till after errors are reported. + prog.BuildAll() + + target := ssa.EnclosingFunction(pkg, qpos.path) + if target == nil { + return fmt.Errorf("no SSA function built for this location (dead code?)") + } + + // Run the pointer analysis and build the complete call graph. + ptaConfig.BuildCallGraph = true + cg := ptrAnalysis(ptaConfig).CallGraph + cg.DeleteSyntheticNodes() + + // Search for an arbitrary path from a root to the target function. + isEnd := func(n *callgraph.Node) bool { return n.Func == target } + callpath := callgraph.PathSearch(cg.Root, isEnd) + if callpath != nil { + callpath = callpath[1:] // remove synthetic edge from + } + + q.Fset = fset + q.result = &callstackResult{ + qpos: qpos, + target: target, + callpath: callpath, + } + return nil +} + +type callstackResult struct { + qpos *queryPos + target *ssa.Function + callpath []*callgraph.Edge +} + +func (r *callstackResult) display(printf printfFunc) { + if r.callpath != nil { + printf(r.qpos, "Found a call path from root to %s", r.target) + printf(r.target, "%s", r.target) + for i := len(r.callpath) - 1; i >= 0; i-- { + edge := r.callpath[i] + printf(edge, "%s from %s", edge.Description(), edge.Caller.Func) + } + } else { + printf(r.target, "%s is unreachable in this analysis scope", r.target) + } +} + +func (r *callstackResult) toSerial(res *serial.Result, fset *token.FileSet) { + var callers []serial.Caller + for i := len(r.callpath) - 1; i >= 0; i-- { // (innermost first) + edge := r.callpath[i] + callers = append(callers, serial.Caller{ + Pos: fset.Position(edge.Pos()).String(), + Caller: edge.Caller.Func.String(), + Desc: edge.Description(), + }) + } + res.Callstack = &serial.CallStack{ + Pos: fset.Position(r.target.Pos()).String(), + Target: r.target.String(), + Callers: callers, + } +} diff --git a/vendor/golang.org/x/tools/oracle/definition.go b/vendor/golang.org/x/tools/oracle/definition.go new file mode 100644 index 0000000..a0340c6 --- /dev/null +++ b/vendor/golang.org/x/tools/oracle/definition.go @@ -0,0 +1,76 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package oracle + +import ( + "fmt" + "go/ast" + "go/token" + + "golang.org/x/tools/go/loader" + "golang.org/x/tools/go/types" + "golang.org/x/tools/oracle/serial" +) + +// definition reports the location of the definition of an identifier. +// +// TODO(adonovan): opt: for intra-file references, the parser's +// resolution might be enough; we should start with that. +// +func definition(q *Query) error { + lconf := loader.Config{Build: q.Build} + allowErrors(&lconf) + + if err := importQueryPackage(q.Pos, &lconf); err != nil { + return err + } + + // Load/parse/type-check the program. + lprog, err := lconf.Load() + if err != nil { + return err + } + q.Fset = lprog.Fset + + qpos, err := parseQueryPos(lprog, q.Pos, false) + if err != nil { + return err + } + + id, _ := qpos.path[0].(*ast.Ident) + if id == nil { + return fmt.Errorf("no identifier here") + } + + obj := qpos.info.ObjectOf(id) + if obj == nil { + // Happens for y in "switch y := x.(type)", + // and the package declaration, + // but I think that's all. + return fmt.Errorf("no object for identifier") + } + + q.result = &definitionResult{qpos, obj} + return nil +} + +type definitionResult struct { + qpos *queryPos + obj types.Object // object it denotes +} + +func (r *definitionResult) display(printf printfFunc) { + printf(r.obj, "defined here as %s", r.qpos.objectString(r.obj)) +} + +func (r *definitionResult) toSerial(res *serial.Result, fset *token.FileSet) { + definition := &serial.Definition{ + Desc: r.obj.String(), + } + if pos := r.obj.Pos(); pos != token.NoPos { // Package objects have no Pos() + definition.ObjPos = fset.Position(pos).String() + } + res.Definition = definition +} diff --git a/vendor/golang.org/x/tools/oracle/describe.go b/vendor/golang.org/x/tools/oracle/describe.go new file mode 100644 index 0000000..ea1c5ec --- /dev/null +++ b/vendor/golang.org/x/tools/oracle/describe.go @@ -0,0 +1,763 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package oracle + +import ( + "bytes" + "fmt" + "go/ast" + "go/token" + "log" + "os" + "strings" + + "golang.org/x/tools/go/ast/astutil" + "golang.org/x/tools/go/exact" + "golang.org/x/tools/go/loader" + "golang.org/x/tools/go/types" + "golang.org/x/tools/go/types/typeutil" + "golang.org/x/tools/oracle/serial" +) + +// describe describes the syntax node denoted by the query position, +// including: +// - its syntactic category +// - the definition of its referent (for identifiers) [now redundant] +// - its type and method set (for an expression or type expression) +// +func describe(q *Query) error { + lconf := loader.Config{Build: q.Build} + allowErrors(&lconf) + + if err := importQueryPackage(q.Pos, &lconf); err != nil { + return err + } + + // Load/parse/type-check the program. + lprog, err := lconf.Load() + if err != nil { + return err + } + q.Fset = lprog.Fset + + qpos, err := parseQueryPos(lprog, q.Pos, true) // (need exact pos) + if err != nil { + return err + } + + if false { // debugging + fprintf(os.Stderr, lprog.Fset, qpos.path[0], "you selected: %s %s", + astutil.NodeDescription(qpos.path[0]), pathToString(qpos.path)) + } + + path, action := findInterestingNode(qpos.info, qpos.path) + switch action { + case actionExpr: + q.result, err = describeValue(qpos, path) + + case actionType: + q.result, err = describeType(qpos, path) + + case actionPackage: + q.result, err = describePackage(qpos, path) + + case actionStmt: + q.result, err = describeStmt(qpos, path) + + case actionUnknown: + q.result = &describeUnknownResult{path[0]} + + default: + panic(action) // unreachable + } + return err +} + +type describeUnknownResult struct { + node ast.Node +} + +func (r *describeUnknownResult) display(printf printfFunc) { + // Nothing much to say about misc syntax. + printf(r.node, "%s", astutil.NodeDescription(r.node)) +} + +func (r *describeUnknownResult) toSerial(res *serial.Result, fset *token.FileSet) { + res.Describe = &serial.Describe{ + Desc: astutil.NodeDescription(r.node), + Pos: fset.Position(r.node.Pos()).String(), + } +} + +type action int + +const ( + actionUnknown action = iota // None of the below + actionExpr // FuncDecl, true Expr or Ident(types.{Const,Var}) + actionType // type Expr or Ident(types.TypeName). + actionStmt // Stmt or Ident(types.Label) + actionPackage // Ident(types.Package) or ImportSpec +) + +// findInterestingNode classifies the syntax node denoted by path as one of: +// - an expression, part of an expression or a reference to a constant +// or variable; +// - a type, part of a type, or a reference to a named type; +// - a statement, part of a statement, or a label referring to a statement; +// - part of a package declaration or import spec. +// - none of the above. +// and returns the most "interesting" associated node, which may be +// the same node, an ancestor or a descendent. +// +func findInterestingNode(pkginfo *loader.PackageInfo, path []ast.Node) ([]ast.Node, action) { + // TODO(adonovan): integrate with go/types/stdlib_test.go and + // apply this to every AST node we can find to make sure it + // doesn't crash. + + // TODO(adonovan): audit for ParenExpr safety, esp. since we + // traverse up and down. + + // TODO(adonovan): if the users selects the "." in + // "fmt.Fprintf()", they'll get an ambiguous selection error; + // we won't even reach here. Can we do better? + + // TODO(adonovan): describing a field within 'type T struct {...}' + // describes the (anonymous) struct type and concludes "no methods". + // We should ascend to the enclosing type decl, if any. + + for len(path) > 0 { + switch n := path[0].(type) { + case *ast.GenDecl: + if len(n.Specs) == 1 { + // Descend to sole {Import,Type,Value}Spec child. + path = append([]ast.Node{n.Specs[0]}, path...) + continue + } + return path, actionUnknown // uninteresting + + case *ast.FuncDecl: + // Descend to function name. + path = append([]ast.Node{n.Name}, path...) + continue + + case *ast.ImportSpec: + return path, actionPackage + + case *ast.ValueSpec: + if len(n.Names) == 1 { + // Descend to sole Ident child. + path = append([]ast.Node{n.Names[0]}, path...) + continue + } + return path, actionUnknown // uninteresting + + case *ast.TypeSpec: + // Descend to type name. + path = append([]ast.Node{n.Name}, path...) + continue + + case ast.Stmt: + return path, actionStmt + + case *ast.ArrayType, + *ast.StructType, + *ast.FuncType, + *ast.InterfaceType, + *ast.MapType, + *ast.ChanType: + return path, actionType + + case *ast.Comment, *ast.CommentGroup, *ast.File, *ast.KeyValueExpr, *ast.CommClause: + return path, actionUnknown // uninteresting + + case *ast.Ellipsis: + // Continue to enclosing node. + // e.g. [...]T in ArrayType + // f(x...) in CallExpr + // f(x...T) in FuncType + + case *ast.Field: + // TODO(adonovan): this needs more thought, + // since fields can be so many things. + if len(n.Names) == 1 { + // Descend to sole Ident child. + path = append([]ast.Node{n.Names[0]}, path...) + continue + } + // Zero names (e.g. anon field in struct) + // or multiple field or param names: + // continue to enclosing field list. + + case *ast.FieldList: + // Continue to enclosing node: + // {Struct,Func,Interface}Type or FuncDecl. + + case *ast.BasicLit: + if _, ok := path[1].(*ast.ImportSpec); ok { + return path[1:], actionPackage + } + return path, actionExpr + + case *ast.SelectorExpr: + // TODO(adonovan): use Selections info directly. + if pkginfo.Uses[n.Sel] == nil { + // TODO(adonovan): is this reachable? + return path, actionUnknown + } + // Descend to .Sel child. + path = append([]ast.Node{n.Sel}, path...) + continue + + case *ast.Ident: + switch pkginfo.ObjectOf(n).(type) { + case *types.PkgName: + return path, actionPackage + + case *types.Const: + return path, actionExpr + + case *types.Label: + return path, actionStmt + + case *types.TypeName: + return path, actionType + + case *types.Var: + // For x in 'struct {x T}', return struct type, for now. + if _, ok := path[1].(*ast.Field); ok { + _ = path[2].(*ast.FieldList) // assertion + if _, ok := path[3].(*ast.StructType); ok { + return path[3:], actionType + } + } + return path, actionExpr + + case *types.Func: + return path, actionExpr + + case *types.Builtin: + // For reference to built-in function, return enclosing call. + path = path[1:] // ascend to enclosing function call + continue + + case *types.Nil: + return path, actionExpr + } + + // No object. + switch path[1].(type) { + case *ast.SelectorExpr: + // Return enclosing selector expression. + return path[1:], actionExpr + + case *ast.Field: + // TODO(adonovan): test this. + // e.g. all f in: + // struct { f, g int } + // interface { f() } + // func (f T) method(f, g int) (f, g bool) + // + // switch path[3].(type) { + // case *ast.FuncDecl: + // case *ast.StructType: + // case *ast.InterfaceType: + // } + // + // return path[1:], actionExpr + // + // Unclear what to do with these. + // Struct.Fields -- field + // Interface.Methods -- field + // FuncType.{Params.Results} -- actionExpr + // FuncDecl.Recv -- actionExpr + + case *ast.File: + // 'package foo' + return path, actionPackage + + case *ast.ImportSpec: + // TODO(adonovan): fix: why no package object? go/types bug? + return path[1:], actionPackage + + default: + // e.g. blank identifier + // or y in "switch y := x.(type)" + // or code in a _test.go file that's not part of the package. + log.Printf("unknown reference %s in %T\n", n, path[1]) + return path, actionUnknown + } + + case *ast.StarExpr: + if pkginfo.Types[n].IsType() { + return path, actionType + } + return path, actionExpr + + case ast.Expr: + // All Expr but {BasicLit,Ident,StarExpr} are + // "true" expressions that evaluate to a value. + return path, actionExpr + } + + // Ascend to parent. + path = path[1:] + } + + return nil, actionUnknown // unreachable +} + +func describeValue(qpos *queryPos, path []ast.Node) (*describeValueResult, error) { + var expr ast.Expr + var obj types.Object + switch n := path[0].(type) { + case *ast.ValueSpec: + // ambiguous ValueSpec containing multiple names + return nil, fmt.Errorf("multiple value specification") + case *ast.Ident: + obj = qpos.info.ObjectOf(n) + expr = n + case ast.Expr: + expr = n + default: + // TODO(adonovan): is this reachable? + return nil, fmt.Errorf("unexpected AST for expr: %T", n) + } + + typ := qpos.info.TypeOf(expr) + constVal := qpos.info.Types[expr].Value + + return &describeValueResult{ + qpos: qpos, + expr: expr, + typ: typ, + constVal: constVal, + obj: obj, + }, nil +} + +type describeValueResult struct { + qpos *queryPos + expr ast.Expr // query node + typ types.Type // type of expression + constVal exact.Value // value of expression, if constant + obj types.Object // var/func/const object, if expr was Ident +} + +func (r *describeValueResult) display(printf printfFunc) { + var prefix, suffix string + if r.constVal != nil { + suffix = fmt.Sprintf(" of constant value %s", r.constVal) + } + switch obj := r.obj.(type) { + case *types.Func: + if recv := obj.Type().(*types.Signature).Recv(); recv != nil { + if _, ok := recv.Type().Underlying().(*types.Interface); ok { + prefix = "interface method " + } else { + prefix = "method " + } + } + } + + // Describe the expression. + if r.obj != nil { + if r.obj.Pos() == r.expr.Pos() { + // defining ident + printf(r.expr, "definition of %s%s%s", prefix, r.qpos.objectString(r.obj), suffix) + } else { + // referring ident + printf(r.expr, "reference to %s%s%s", prefix, r.qpos.objectString(r.obj), suffix) + if def := r.obj.Pos(); def != token.NoPos { + printf(def, "defined here") + } + } + } else { + desc := astutil.NodeDescription(r.expr) + if suffix != "" { + // constant expression + printf(r.expr, "%s%s", desc, suffix) + } else { + // non-constant expression + printf(r.expr, "%s of type %s", desc, r.qpos.typeString(r.typ)) + } + } +} + +func (r *describeValueResult) toSerial(res *serial.Result, fset *token.FileSet) { + var value, objpos string + if r.constVal != nil { + value = r.constVal.String() + } + if r.obj != nil { + objpos = fset.Position(r.obj.Pos()).String() + } + + res.Describe = &serial.Describe{ + Desc: astutil.NodeDescription(r.expr), + Pos: fset.Position(r.expr.Pos()).String(), + Detail: "value", + Value: &serial.DescribeValue{ + Type: r.qpos.typeString(r.typ), + Value: value, + ObjPos: objpos, + }, + } +} + +// ---- TYPE ------------------------------------------------------------ + +func describeType(qpos *queryPos, path []ast.Node) (*describeTypeResult, error) { + var description string + var t types.Type + switch n := path[0].(type) { + case *ast.Ident: + t = qpos.info.TypeOf(n) + switch t := t.(type) { + case *types.Basic: + description = "reference to built-in " + + case *types.Named: + isDef := t.Obj().Pos() == n.Pos() // see caveats at isDef above + if isDef { + description = "definition of " + } else { + description = "reference to " + } + } + + case ast.Expr: + t = qpos.info.TypeOf(n) + + default: + // Unreachable? + return nil, fmt.Errorf("unexpected AST for type: %T", n) + } + + description = description + "type " + qpos.typeString(t) + + // Show sizes for structs and named types (it's fairly obvious for others). + switch t.(type) { + case *types.Named, *types.Struct: + szs := types.StdSizes{8, 8} // assume amd64 + description = fmt.Sprintf("%s (size %d, align %d)", description, + szs.Sizeof(t), szs.Alignof(t)) + } + + return &describeTypeResult{ + qpos: qpos, + node: path[0], + description: description, + typ: t, + methods: accessibleMethods(t, qpos.info.Pkg), + }, nil +} + +type describeTypeResult struct { + qpos *queryPos + node ast.Node + description string + typ types.Type + methods []*types.Selection +} + +func (r *describeTypeResult) display(printf printfFunc) { + printf(r.node, "%s", r.description) + + // Show the underlying type for a reference to a named type. + if nt, ok := r.typ.(*types.Named); ok && r.node.Pos() != nt.Obj().Pos() { + printf(nt.Obj(), "defined as %s", r.qpos.typeString(nt.Underlying())) + } + + // Print the method set, if the type kind is capable of bearing methods. + switch r.typ.(type) { + case *types.Interface, *types.Struct, *types.Named: + if len(r.methods) > 0 { + printf(r.node, "Method set:") + for _, meth := range r.methods { + // TODO(adonovan): print these relative + // to the owning package, not the + // query package. + printf(meth.Obj(), "\t%s", r.qpos.selectionString(meth)) + } + } else { + printf(r.node, "No methods.") + } + } +} + +func (r *describeTypeResult) toSerial(res *serial.Result, fset *token.FileSet) { + var namePos, nameDef string + if nt, ok := r.typ.(*types.Named); ok { + namePos = fset.Position(nt.Obj().Pos()).String() + nameDef = nt.Underlying().String() + } + res.Describe = &serial.Describe{ + Desc: r.description, + Pos: fset.Position(r.node.Pos()).String(), + Detail: "type", + Type: &serial.DescribeType{ + Type: r.qpos.typeString(r.typ), + NamePos: namePos, + NameDef: nameDef, + Methods: methodsToSerial(r.qpos.info.Pkg, r.methods, fset), + }, + } +} + +// ---- PACKAGE ------------------------------------------------------------ + +func describePackage(qpos *queryPos, path []ast.Node) (*describePackageResult, error) { + var description string + var pkg *types.Package + switch n := path[0].(type) { + case *ast.ImportSpec: + var pkgname *types.PkgName + if n.Name != nil { + pkgname = qpos.info.Defs[n.Name].(*types.PkgName) + } else if p := qpos.info.Implicits[n]; p != nil { + pkgname = p.(*types.PkgName) + } + pkg = pkgname.Imported() + description = fmt.Sprintf("import of package %q", pkg.Path()) + + case *ast.Ident: + if _, isDef := path[1].(*ast.File); isDef { + // e.g. package id + pkg = qpos.info.Pkg + description = fmt.Sprintf("definition of package %q", pkg.Path()) + } else { + // e.g. import id "..." + // or id.F() + pkg = qpos.info.ObjectOf(n).(*types.PkgName).Imported() + description = fmt.Sprintf("reference to package %q", pkg.Path()) + } + + default: + // Unreachable? + return nil, fmt.Errorf("unexpected AST for package: %T", n) + } + + var members []*describeMember + // NB: "unsafe" has no types.Package + if pkg != nil { + // Enumerate the accessible package members + // in lexicographic order. + for _, name := range pkg.Scope().Names() { + if pkg == qpos.info.Pkg || ast.IsExported(name) { + mem := pkg.Scope().Lookup(name) + var methods []*types.Selection + if mem, ok := mem.(*types.TypeName); ok { + methods = accessibleMethods(mem.Type(), qpos.info.Pkg) + } + members = append(members, &describeMember{ + mem, + methods, + }) + + } + } + } + + return &describePackageResult{qpos.fset, path[0], description, pkg, members}, nil +} + +type describePackageResult struct { + fset *token.FileSet + node ast.Node + description string + pkg *types.Package + members []*describeMember // in lexicographic name order +} + +type describeMember struct { + obj types.Object + methods []*types.Selection // in types.MethodSet order +} + +func (r *describePackageResult) display(printf printfFunc) { + printf(r.node, "%s", r.description) + + // Compute max width of name "column". + maxname := 0 + for _, mem := range r.members { + if l := len(mem.obj.Name()); l > maxname { + maxname = l + } + } + + for _, mem := range r.members { + printf(mem.obj, "\t%s", formatMember(mem.obj, maxname)) + for _, meth := range mem.methods { + printf(meth.Obj(), "\t\t%s", types.SelectionString(meth, types.RelativeTo(r.pkg))) + } + } +} + +func formatMember(obj types.Object, maxname int) string { + qualifier := types.RelativeTo(obj.Pkg()) + var buf bytes.Buffer + fmt.Fprintf(&buf, "%-5s %-*s", tokenOf(obj), maxname, obj.Name()) + switch obj := obj.(type) { + case *types.Const: + fmt.Fprintf(&buf, " %s = %s", types.TypeString(obj.Type(), qualifier), obj.Val().String()) + + case *types.Func: + fmt.Fprintf(&buf, " %s", types.TypeString(obj.Type(), qualifier)) + + case *types.TypeName: + // Abbreviate long aggregate type names. + var abbrev string + switch t := obj.Type().Underlying().(type) { + case *types.Interface: + if t.NumMethods() > 1 { + abbrev = "interface{...}" + } + case *types.Struct: + if t.NumFields() > 1 { + abbrev = "struct{...}" + } + } + if abbrev == "" { + fmt.Fprintf(&buf, " %s", types.TypeString(obj.Type().Underlying(), qualifier)) + } else { + fmt.Fprintf(&buf, " %s", abbrev) + } + + case *types.Var: + fmt.Fprintf(&buf, " %s", types.TypeString(obj.Type(), qualifier)) + } + return buf.String() +} + +func (r *describePackageResult) toSerial(res *serial.Result, fset *token.FileSet) { + var members []*serial.DescribeMember + for _, mem := range r.members { + typ := mem.obj.Type() + var val string + switch mem := mem.obj.(type) { + case *types.Const: + val = mem.Val().String() + case *types.TypeName: + typ = typ.Underlying() + } + members = append(members, &serial.DescribeMember{ + Name: mem.obj.Name(), + Type: typ.String(), + Value: val, + Pos: fset.Position(mem.obj.Pos()).String(), + Kind: tokenOf(mem.obj), + Methods: methodsToSerial(r.pkg, mem.methods, fset), + }) + } + res.Describe = &serial.Describe{ + Desc: r.description, + Pos: fset.Position(r.node.Pos()).String(), + Detail: "package", + Package: &serial.DescribePackage{ + Path: r.pkg.Path(), + Members: members, + }, + } +} + +func tokenOf(o types.Object) string { + switch o.(type) { + case *types.Func: + return "func" + case *types.Var: + return "var" + case *types.TypeName: + return "type" + case *types.Const: + return "const" + case *types.PkgName: + return "package" + } + panic(o) +} + +// ---- STATEMENT ------------------------------------------------------------ + +func describeStmt(qpos *queryPos, path []ast.Node) (*describeStmtResult, error) { + var description string + switch n := path[0].(type) { + case *ast.Ident: + if qpos.info.Defs[n] != nil { + description = "labelled statement" + } else { + description = "reference to labelled statement" + } + + default: + // Nothing much to say about statements. + description = astutil.NodeDescription(n) + } + return &describeStmtResult{qpos.fset, path[0], description}, nil +} + +type describeStmtResult struct { + fset *token.FileSet + node ast.Node + description string +} + +func (r *describeStmtResult) display(printf printfFunc) { + printf(r.node, "%s", r.description) +} + +func (r *describeStmtResult) toSerial(res *serial.Result, fset *token.FileSet) { + res.Describe = &serial.Describe{ + Desc: r.description, + Pos: fset.Position(r.node.Pos()).String(), + Detail: "unknown", + } +} + +// ------------------- Utilities ------------------- + +// pathToString returns a string containing the concrete types of the +// nodes in path. +func pathToString(path []ast.Node) string { + var buf bytes.Buffer + fmt.Fprint(&buf, "[") + for i, n := range path { + if i > 0 { + fmt.Fprint(&buf, " ") + } + fmt.Fprint(&buf, strings.TrimPrefix(fmt.Sprintf("%T", n), "*ast.")) + } + fmt.Fprint(&buf, "]") + return buf.String() +} + +func accessibleMethods(t types.Type, from *types.Package) []*types.Selection { + var methods []*types.Selection + for _, meth := range typeutil.IntuitiveMethodSet(t, nil) { + if isAccessibleFrom(meth.Obj(), from) { + methods = append(methods, meth) + } + } + return methods +} + +func isAccessibleFrom(obj types.Object, pkg *types.Package) bool { + return ast.IsExported(obj.Name()) || obj.Pkg() == pkg +} + +func methodsToSerial(this *types.Package, methods []*types.Selection, fset *token.FileSet) []serial.DescribeMethod { + qualifier := types.RelativeTo(this) + var jmethods []serial.DescribeMethod + for _, meth := range methods { + var ser serial.DescribeMethod + if meth != nil { // may contain nils when called by implements (on a method) + ser = serial.DescribeMethod{ + Name: types.SelectionString(meth, qualifier), + Pos: fset.Position(meth.Obj().Pos()).String(), + } + } + jmethods = append(jmethods, ser) + } + return jmethods +} diff --git a/vendor/golang.org/x/tools/oracle/freevars.go b/vendor/golang.org/x/tools/oracle/freevars.go new file mode 100644 index 0000000..400a118 --- /dev/null +++ b/vendor/golang.org/x/tools/oracle/freevars.go @@ -0,0 +1,222 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package oracle + +import ( + "bytes" + "go/ast" + "go/printer" + "go/token" + "sort" + + "golang.org/x/tools/go/loader" + "golang.org/x/tools/go/types" + "golang.org/x/tools/oracle/serial" +) + +// freevars displays the lexical (not package-level) free variables of +// the selection. +// +// It treats A.B.C as a separate variable from A to reveal the parts +// of an aggregate type that are actually needed. +// This aids refactoring. +// +// TODO(adonovan): optionally display the free references to +// file/package scope objects, and to objects from other packages. +// Depending on where the resulting function abstraction will go, +// these might be interesting. Perhaps group the results into three +// bands. +// +func freevars(q *Query) error { + lconf := loader.Config{Build: q.Build} + allowErrors(&lconf) + + if err := importQueryPackage(q.Pos, &lconf); err != nil { + return err + } + + // Load/parse/type-check the program. + lprog, err := lconf.Load() + if err != nil { + return err + } + q.Fset = lprog.Fset + + qpos, err := parseQueryPos(lprog, q.Pos, false) + if err != nil { + return err + } + + file := qpos.path[len(qpos.path)-1] // the enclosing file + fileScope := qpos.info.Scopes[file] + pkgScope := fileScope.Parent() + + // The id and sel functions return non-nil if they denote an + // object o or selection o.x.y that is referenced by the + // selection but defined neither within the selection nor at + // file scope, i.e. it is in the lexical environment. + var id func(n *ast.Ident) types.Object + var sel func(n *ast.SelectorExpr) types.Object + + sel = func(n *ast.SelectorExpr) types.Object { + switch x := unparen(n.X).(type) { + case *ast.SelectorExpr: + return sel(x) + case *ast.Ident: + return id(x) + } + return nil + } + + id = func(n *ast.Ident) types.Object { + obj := qpos.info.Uses[n] + if obj == nil { + return nil // not a reference + } + if _, ok := obj.(*types.PkgName); ok { + return nil // imported package + } + if !(file.Pos() <= obj.Pos() && obj.Pos() <= file.End()) { + return nil // not defined in this file + } + scope := obj.Parent() + if scope == nil { + return nil // e.g. interface method, struct field + } + if scope == fileScope || scope == pkgScope { + return nil // defined at file or package scope + } + if qpos.start <= obj.Pos() && obj.Pos() <= qpos.end { + return nil // defined within selection => not free + } + return obj + } + + // Maps each reference that is free in the selection + // to the object it refers to. + // The map de-duplicates repeated references. + refsMap := make(map[string]freevarsRef) + + // Visit all the identifiers in the selected ASTs. + ast.Inspect(qpos.path[0], func(n ast.Node) bool { + if n == nil { + return true // popping DFS stack + } + + // Is this node contained within the selection? + // (freevars permits inexact selections, + // like two stmts in a block.) + if qpos.start <= n.Pos() && n.End() <= qpos.end { + var obj types.Object + var prune bool + switch n := n.(type) { + case *ast.Ident: + obj = id(n) + + case *ast.SelectorExpr: + obj = sel(n) + prune = true + } + + if obj != nil { + var kind string + switch obj.(type) { + case *types.Var: + kind = "var" + case *types.Func: + kind = "func" + case *types.TypeName: + kind = "type" + case *types.Const: + kind = "const" + case *types.Label: + kind = "label" + default: + panic(obj) + } + + typ := qpos.info.TypeOf(n.(ast.Expr)) + ref := freevarsRef{kind, printNode(lprog.Fset, n), typ, obj} + refsMap[ref.ref] = ref + + if prune { + return false // don't descend + } + } + } + + return true // descend + }) + + refs := make([]freevarsRef, 0, len(refsMap)) + for _, ref := range refsMap { + refs = append(refs, ref) + } + sort.Sort(byRef(refs)) + + q.result = &freevarsResult{ + qpos: qpos, + refs: refs, + } + return nil +} + +type freevarsResult struct { + qpos *queryPos + refs []freevarsRef +} + +type freevarsRef struct { + kind string + ref string + typ types.Type + obj types.Object +} + +func (r *freevarsResult) display(printf printfFunc) { + if len(r.refs) == 0 { + printf(r.qpos, "No free identifiers.") + } else { + printf(r.qpos, "Free identifiers:") + qualifier := types.RelativeTo(r.qpos.info.Pkg) + for _, ref := range r.refs { + // Avoid printing "type T T". + var typstr string + if ref.kind != "type" { + typstr = " " + types.TypeString(ref.typ, qualifier) + } + printf(ref.obj, "%s %s%s", ref.kind, ref.ref, typstr) + } + } +} + +func (r *freevarsResult) toSerial(res *serial.Result, fset *token.FileSet) { + var refs []*serial.FreeVar + for _, ref := range r.refs { + refs = append(refs, + &serial.FreeVar{ + Pos: fset.Position(ref.obj.Pos()).String(), + Kind: ref.kind, + Ref: ref.ref, + Type: ref.typ.String(), + }) + } + res.Freevars = refs +} + +// -------- utils -------- + +type byRef []freevarsRef + +func (p byRef) Len() int { return len(p) } +func (p byRef) Less(i, j int) bool { return p[i].ref < p[j].ref } +func (p byRef) Swap(i, j int) { p[i], p[j] = p[j], p[i] } + +// printNode returns the pretty-printed syntax of n. +func printNode(fset *token.FileSet, n ast.Node) string { + var buf bytes.Buffer + printer.Fprint(&buf, fset, n) + return buf.String() +} diff --git a/vendor/golang.org/x/tools/oracle/implements.go b/vendor/golang.org/x/tools/oracle/implements.go new file mode 100644 index 0000000..3155ca2 --- /dev/null +++ b/vendor/golang.org/x/tools/oracle/implements.go @@ -0,0 +1,330 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package oracle + +import ( + "fmt" + "go/ast" + "go/token" + "reflect" + "sort" + "strings" + + "golang.org/x/tools/go/loader" + "golang.org/x/tools/go/types" + "golang.org/x/tools/go/types/typeutil" + "golang.org/x/tools/oracle/serial" +) + +// Implements displays the "implements" relation as it pertains to the +// selected type within a single package. +// If the selection is a method, 'implements' displays +// the corresponding methods of the types that would have been reported +// by an implements query on the receiver type. +// +func implements(q *Query) error { + lconf := loader.Config{Build: q.Build} + allowErrors(&lconf) + + if err := importQueryPackage(q.Pos, &lconf); err != nil { + return err + } + + // Load/parse/type-check the program. + lprog, err := lconf.Load() + if err != nil { + return err + } + q.Fset = lprog.Fset + + qpos, err := parseQueryPos(lprog, q.Pos, false) + if err != nil { + return err + } + + // Find the selected type. + path, action := findInterestingNode(qpos.info, qpos.path) + + var method *types.Func + var T types.Type // selected type (receiver if method != nil) + + switch action { + case actionExpr: + // method? + if id, ok := path[0].(*ast.Ident); ok { + if obj, ok := qpos.info.ObjectOf(id).(*types.Func); ok { + recv := obj.Type().(*types.Signature).Recv() + if recv == nil { + return fmt.Errorf("this function is not a method") + } + method = obj + T = recv.Type() + } + } + case actionType: + T = qpos.info.TypeOf(path[0].(ast.Expr)) + } + if T == nil { + return fmt.Errorf("no type or method here") + } + + // Find all named types, even local types (which can have + // methods via promotion) and the built-in "error". + // + // TODO(adonovan): include all packages in PTA scope too? + // i.e. don't reduceScope? + // + var allNamed []types.Type + for _, info := range lprog.AllPackages { + for _, obj := range info.Defs { + if obj, ok := obj.(*types.TypeName); ok { + allNamed = append(allNamed, obj.Type()) + } + } + } + allNamed = append(allNamed, types.Universe.Lookup("error").Type()) + + var msets typeutil.MethodSetCache + + // Test each named type. + var to, from, fromPtr []types.Type + for _, U := range allNamed { + if isInterface(T) { + if msets.MethodSet(T).Len() == 0 { + continue // empty interface + } + if isInterface(U) { + if msets.MethodSet(U).Len() == 0 { + continue // empty interface + } + + // T interface, U interface + if !types.Identical(T, U) { + if types.AssignableTo(U, T) { + to = append(to, U) + } + if types.AssignableTo(T, U) { + from = append(from, U) + } + } + } else { + // T interface, U concrete + if types.AssignableTo(U, T) { + to = append(to, U) + } else if pU := types.NewPointer(U); types.AssignableTo(pU, T) { + to = append(to, pU) + } + } + } else if isInterface(U) { + if msets.MethodSet(U).Len() == 0 { + continue // empty interface + } + + // T concrete, U interface + if types.AssignableTo(T, U) { + from = append(from, U) + } else if pT := types.NewPointer(T); types.AssignableTo(pT, U) { + fromPtr = append(fromPtr, U) + } + } + } + + var pos interface{} = qpos + if nt, ok := deref(T).(*types.Named); ok { + pos = nt.Obj() + } + + // Sort types (arbitrarily) to ensure test determinism. + sort.Sort(typesByString(to)) + sort.Sort(typesByString(from)) + sort.Sort(typesByString(fromPtr)) + + var toMethod, fromMethod, fromPtrMethod []*types.Selection // contain nils + if method != nil { + for _, t := range to { + toMethod = append(toMethod, + types.NewMethodSet(t).Lookup(method.Pkg(), method.Name())) + } + for _, t := range from { + fromMethod = append(fromMethod, + types.NewMethodSet(t).Lookup(method.Pkg(), method.Name())) + } + for _, t := range fromPtr { + fromPtrMethod = append(fromPtrMethod, + types.NewMethodSet(t).Lookup(method.Pkg(), method.Name())) + } + } + + q.result = &implementsResult{ + qpos, T, pos, to, from, fromPtr, method, toMethod, fromMethod, fromPtrMethod, + } + return nil +} + +type implementsResult struct { + qpos *queryPos + + t types.Type // queried type (not necessarily named) + pos interface{} // pos of t (*types.Name or *QueryPos) + to []types.Type // named or ptr-to-named types assignable to interface T + from []types.Type // named interfaces assignable from T + fromPtr []types.Type // named interfaces assignable only from *T + + // if a method was queried: + method *types.Func // queried method + toMethod []*types.Selection // method of type to[i], if any + fromMethod []*types.Selection // method of type from[i], if any + fromPtrMethod []*types.Selection // method of type fromPtrMethod[i], if any +} + +func (r *implementsResult) display(printf printfFunc) { + relation := "is implemented by" + + meth := func(sel *types.Selection) { + if sel != nil { + printf(sel.Obj(), "\t%s method (%s).%s", + relation, r.qpos.typeString(sel.Recv()), sel.Obj().Name()) + } + } + + if isInterface(r.t) { + if types.NewMethodSet(r.t).Len() == 0 { // TODO(adonovan): cache mset + printf(r.pos, "empty interface type %s", r.qpos.typeString(r.t)) + return + } + + if r.method == nil { + printf(r.pos, "interface type %s", r.qpos.typeString(r.t)) + } else { + printf(r.method, "abstract method %s", r.qpos.objectString(r.method)) + } + + // Show concrete types (or methods) first; use two passes. + for i, sub := range r.to { + if !isInterface(sub) { + if r.method == nil { + printf(deref(sub).(*types.Named).Obj(), "\t%s %s type %s", + relation, typeKind(sub), r.qpos.typeString(sub)) + } else { + meth(r.toMethod[i]) + } + } + } + for i, sub := range r.to { + if isInterface(sub) { + if r.method == nil { + printf(sub.(*types.Named).Obj(), "\t%s %s type %s", + relation, typeKind(sub), r.qpos.typeString(sub)) + } else { + meth(r.toMethod[i]) + } + } + } + + relation = "implements" + for i, super := range r.from { + if r.method == nil { + printf(super.(*types.Named).Obj(), "\t%s %s", + relation, r.qpos.typeString(super)) + } else { + meth(r.fromMethod[i]) + } + } + } else { + relation = "implements" + + if r.from != nil { + if r.method == nil { + printf(r.pos, "%s type %s", + typeKind(r.t), r.qpos.typeString(r.t)) + } else { + printf(r.method, "concrete method %s", + r.qpos.objectString(r.method)) + } + for i, super := range r.from { + if r.method == nil { + printf(super.(*types.Named).Obj(), "\t%s %s", + relation, r.qpos.typeString(super)) + } else { + meth(r.fromMethod[i]) + } + } + } + if r.fromPtr != nil { + if r.method == nil { + printf(r.pos, "pointer type *%s", r.qpos.typeString(r.t)) + } else { + // TODO(adonovan): de-dup (C).f and (*C).f implementing (I).f. + printf(r.method, "concrete method %s", + r.qpos.objectString(r.method)) + } + + for i, psuper := range r.fromPtr { + if r.method == nil { + printf(psuper.(*types.Named).Obj(), "\t%s %s", + relation, r.qpos.typeString(psuper)) + } else { + meth(r.fromPtrMethod[i]) + } + } + } else if r.from == nil { + printf(r.pos, "%s type %s implements only interface{}", + typeKind(r.t), r.qpos.typeString(r.t)) + } + } +} + +func (r *implementsResult) toSerial(res *serial.Result, fset *token.FileSet) { + res.Implements = &serial.Implements{ + T: makeImplementsType(r.t, fset), + AssignableTo: makeImplementsTypes(r.to, fset), + AssignableFrom: makeImplementsTypes(r.from, fset), + AssignableFromPtr: makeImplementsTypes(r.fromPtr, fset), + AssignableToMethod: methodsToSerial(r.qpos.info.Pkg, r.toMethod, fset), + AssignableFromMethod: methodsToSerial(r.qpos.info.Pkg, r.fromMethod, fset), + AssignableFromPtrMethod: methodsToSerial(r.qpos.info.Pkg, r.fromPtrMethod, fset), + } + if r.method != nil { + res.Implements.Method = &serial.DescribeMethod{ + Name: r.qpos.objectString(r.method), + Pos: fset.Position(r.method.Pos()).String(), + } + } +} + +func makeImplementsTypes(tt []types.Type, fset *token.FileSet) []serial.ImplementsType { + var r []serial.ImplementsType + for _, t := range tt { + r = append(r, makeImplementsType(t, fset)) + } + return r +} + +func makeImplementsType(T types.Type, fset *token.FileSet) serial.ImplementsType { + var pos token.Pos + if nt, ok := deref(T).(*types.Named); ok { // implementsResult.t may be non-named + pos = nt.Obj().Pos() + } + return serial.ImplementsType{ + Name: T.String(), + Pos: fset.Position(pos).String(), + Kind: typeKind(T), + } +} + +// typeKind returns a string describing the underlying kind of type, +// e.g. "slice", "array", "struct". +func typeKind(T types.Type) string { + s := reflect.TypeOf(T.Underlying()).String() + return strings.ToLower(strings.TrimPrefix(s, "*types.")) +} + +func isInterface(T types.Type) bool { return types.IsInterface(T) } + +type typesByString []types.Type + +func (p typesByString) Len() int { return len(p) } +func (p typesByString) Less(i, j int) bool { return p[i].String() < p[j].String() } +func (p typesByString) Swap(i, j int) { p[i], p[j] = p[j], p[i] } diff --git a/vendor/golang.org/x/tools/oracle/oracle.go b/vendor/golang.org/x/tools/oracle/oracle.go new file mode 100644 index 0000000..544cfa4 --- /dev/null +++ b/vendor/golang.org/x/tools/oracle/oracle.go @@ -0,0 +1,364 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package oracle contains the implementation of the oracle tool whose +// command-line is provided by golang.org/x/tools/cmd/oracle. +// +// http://golang.org/s/oracle-design +// http://golang.org/s/oracle-user-manual +// +package oracle // import "golang.org/x/tools/oracle" + +// This file defines oracle.Query, the entry point for the oracle tool. +// The actual executable is defined in cmd/oracle. + +// TODO(adonovan): new queries +// - show all statements that may update the selected lvalue +// (local, global, field, etc). +// - show all places where an object of type T is created +// (&T{}, var t T, new(T), new(struct{array [3]T}), etc. + +import ( + "fmt" + "go/ast" + "go/build" + "go/parser" + "go/token" + "io" + "path/filepath" + + "golang.org/x/tools/go/ast/astutil" + "golang.org/x/tools/go/loader" + "golang.org/x/tools/go/pointer" + "golang.org/x/tools/go/ssa" + "golang.org/x/tools/go/types" + "golang.org/x/tools/oracle/serial" +) + +type printfFunc func(pos interface{}, format string, args ...interface{}) + +// queryResult is the interface of each query-specific result type. +type queryResult interface { + toSerial(res *serial.Result, fset *token.FileSet) + display(printf printfFunc) +} + +// A QueryPos represents the position provided as input to a query: +// a textual extent in the program's source code, the AST node it +// corresponds to, and the package to which it belongs. +// Instances are created by parseQueryPos. +type queryPos struct { + fset *token.FileSet + start, end token.Pos // source extent of query + path []ast.Node // AST path from query node to root of ast.File + exact bool // 2nd result of PathEnclosingInterval + info *loader.PackageInfo // type info for the queried package (nil for fastQueryPos) +} + +// TypeString prints type T relative to the query position. +func (qpos *queryPos) typeString(T types.Type) string { + return types.TypeString(T, types.RelativeTo(qpos.info.Pkg)) +} + +// ObjectString prints object obj relative to the query position. +func (qpos *queryPos) objectString(obj types.Object) string { + return types.ObjectString(obj, types.RelativeTo(qpos.info.Pkg)) +} + +// SelectionString prints selection sel relative to the query position. +func (qpos *queryPos) selectionString(sel *types.Selection) string { + return types.SelectionString(sel, types.RelativeTo(qpos.info.Pkg)) +} + +// A Query specifies a single oracle query. +type Query struct { + Mode string // query mode ("callers", etc) + Pos string // query position + Build *build.Context // package loading configuration + + // pointer analysis options + Scope []string // main packages in (*loader.Config).FromArgs syntax + PTALog io.Writer // (optional) pointer-analysis log file + Reflection bool // model reflection soundly (currently slow). + + // Populated during Run() + Fset *token.FileSet + result queryResult +} + +// Serial returns an instance of serial.Result, which implements the +// {xml,json}.Marshaler interfaces so that query results can be +// serialized as JSON or XML. +// +func (q *Query) Serial() *serial.Result { + resj := &serial.Result{Mode: q.Mode} + q.result.toSerial(resj, q.Fset) + return resj +} + +// WriteTo writes the oracle query result res to out in a compiler diagnostic format. +func (q *Query) WriteTo(out io.Writer) { + printf := func(pos interface{}, format string, args ...interface{}) { + fprintf(out, q.Fset, pos, format, args...) + } + q.result.display(printf) +} + +// Run runs an oracle query and populates its Fset and Result. +func Run(q *Query) error { + switch q.Mode { + case "callees": + return callees(q) + case "callers": + return callers(q) + case "callstack": + return callstack(q) + case "peers": + return peers(q) + case "pointsto": + return pointsto(q) + case "whicherrs": + return whicherrs(q) + case "definition": + return definition(q) + case "describe": + return describe(q) + case "freevars": + return freevars(q) + case "implements": + return implements(q) + case "referrers": + return referrers(q) + case "what": + return what(q) + default: + return fmt.Errorf("invalid mode: %q", q.Mode) + } +} + +func setPTAScope(lconf *loader.Config, scope []string) error { + if len(scope) == 0 { + return fmt.Errorf("no packages specified for pointer analysis scope") + } + + // Determine initial packages for PTA. + args, err := lconf.FromArgs(scope, true) + if err != nil { + return err + } + if len(args) > 0 { + return fmt.Errorf("surplus arguments: %q", args) + } + return nil +} + +// Create a pointer.Config whose scope is the initial packages of lprog +// and their dependencies. +func setupPTA(prog *ssa.Program, lprog *loader.Program, ptaLog io.Writer, reflection bool) (*pointer.Config, error) { + // TODO(adonovan): the body of this function is essentially + // duplicated in all go/pointer clients. Refactor. + + // For each initial package (specified on the command line), + // if it has a main function, analyze that, + // otherwise analyze its tests, if any. + var testPkgs, mains []*ssa.Package + for _, info := range lprog.InitialPackages() { + initialPkg := prog.Package(info.Pkg) + + // Add package to the pointer analysis scope. + if initialPkg.Func("main") != nil { + mains = append(mains, initialPkg) + } else { + testPkgs = append(testPkgs, initialPkg) + } + } + if testPkgs != nil { + if p := prog.CreateTestMainPackage(testPkgs...); p != nil { + mains = append(mains, p) + } + } + if mains == nil { + return nil, fmt.Errorf("analysis scope has no main and no tests") + } + return &pointer.Config{ + Log: ptaLog, + Reflection: reflection, + Mains: mains, + }, nil +} + +// importQueryPackage finds the package P containing the +// query position and tells conf to import it. +func importQueryPackage(pos string, conf *loader.Config) error { + fqpos, err := fastQueryPos(pos) + if err != nil { + return err // bad query + } + filename := fqpos.fset.File(fqpos.start).Name() + + // This will not work for ad-hoc packages + // such as $GOROOT/src/net/http/triv.go. + // TODO(adonovan): ensure we report a clear error. + _, importPath, err := guessImportPath(filename, conf.Build) + if err != nil { + return err // can't find GOPATH dir + } + if importPath == "" { + return fmt.Errorf("can't guess import path from %s", filename) + } + + // Check that it's possible to load the queried package. + // (e.g. oracle tests contain different 'package' decls in same dir.) + // Keep consistent with logic in loader/util.go! + cfg2 := *conf.Build + cfg2.CgoEnabled = false + bp, err := cfg2.Import(importPath, "", 0) + if err != nil { + return err // no files for package + } + + switch pkgContainsFile(bp, filename) { + case 'T': + conf.ImportWithTests(importPath) + case 'X': + conf.ImportWithTests(importPath) + importPath += "_test" // for TypeCheckFuncBodies + case 'G': + conf.Import(importPath) + default: + return fmt.Errorf("package %q doesn't contain file %s", + importPath, filename) + } + + conf.TypeCheckFuncBodies = func(p string) bool { return p == importPath } + + return nil +} + +// pkgContainsFile reports whether file was among the packages Go +// files, Test files, eXternal test files, or not found. +func pkgContainsFile(bp *build.Package, filename string) byte { + for i, files := range [][]string{bp.GoFiles, bp.TestGoFiles, bp.XTestGoFiles} { + for _, file := range files { + if sameFile(filepath.Join(bp.Dir, file), filename) { + return "GTX"[i] + } + } + } + return 0 // not found +} + +// ParseQueryPos parses the source query position pos and returns the +// AST node of the loaded program lprog that it identifies. +// If needExact, it must identify a single AST subtree; +// this is appropriate for queries that allow fairly arbitrary syntax, +// e.g. "describe". +// +func parseQueryPos(lprog *loader.Program, posFlag string, needExact bool) (*queryPos, error) { + filename, startOffset, endOffset, err := parsePosFlag(posFlag) + if err != nil { + return nil, err + } + start, end, err := findQueryPos(lprog.Fset, filename, startOffset, endOffset) + if err != nil { + return nil, err + } + info, path, exact := lprog.PathEnclosingInterval(start, end) + if path == nil { + return nil, fmt.Errorf("no syntax here") + } + if needExact && !exact { + return nil, fmt.Errorf("ambiguous selection within %s", astutil.NodeDescription(path[0])) + } + return &queryPos{lprog.Fset, start, end, path, exact, info}, nil +} + +// ---------- Utilities ---------- + +// allowErrors causes type errors to be silently ignored. +// (Not suitable if SSA construction follows.) +func allowErrors(lconf *loader.Config) { + ctxt := *lconf.Build // copy + ctxt.CgoEnabled = false + lconf.Build = &ctxt + lconf.AllowErrors = true + // AllErrors makes the parser always return an AST instead of + // bailing out after 10 errors and returning an empty ast.File. + lconf.ParserMode = parser.AllErrors + lconf.TypeChecker.Error = func(err error) {} +} + +// ptrAnalysis runs the pointer analysis and returns its result. +func ptrAnalysis(conf *pointer.Config) *pointer.Result { + result, err := pointer.Analyze(conf) + if err != nil { + panic(err) // pointer analysis internal error + } + return result +} + +func unparen(e ast.Expr) ast.Expr { return astutil.Unparen(e) } + +// deref returns a pointer's element type; otherwise it returns typ. +func deref(typ types.Type) types.Type { + if p, ok := typ.Underlying().(*types.Pointer); ok { + return p.Elem() + } + return typ +} + +// fprintf prints to w a message of the form "location: message\n" +// where location is derived from pos. +// +// pos must be one of: +// - a token.Pos, denoting a position +// - an ast.Node, denoting an interval +// - anything with a Pos() method: +// ssa.Member, ssa.Value, ssa.Instruction, types.Object, pointer.Label, etc. +// - a QueryPos, denoting the extent of the user's query. +// - nil, meaning no position at all. +// +// The output format is is compatible with the 'gnu' +// compilation-error-regexp in Emacs' compilation mode. +// TODO(adonovan): support other editors. +// +func fprintf(w io.Writer, fset *token.FileSet, pos interface{}, format string, args ...interface{}) { + var start, end token.Pos + switch pos := pos.(type) { + case ast.Node: + start = pos.Pos() + end = pos.End() + case token.Pos: + start = pos + end = start + case interface { + Pos() token.Pos + }: + start = pos.Pos() + end = start + case *queryPos: + start = pos.start + end = pos.end + case nil: + // no-op + default: + panic(fmt.Sprintf("invalid pos: %T", pos)) + } + + if sp := fset.Position(start); start == end { + // (prints "-: " for token.NoPos) + fmt.Fprintf(w, "%s: ", sp) + } else { + ep := fset.Position(end) + // The -1 below is a concession to Emacs's broken use of + // inclusive (not half-open) intervals. + // Other editors may not want it. + // TODO(adonovan): add an -editor=vim|emacs|acme|auto + // flag; auto uses EMACS=t / VIM=... / etc env vars. + fmt.Fprintf(w, "%s:%d.%d-%d.%d: ", + sp.Filename, sp.Line, sp.Column, ep.Line, ep.Column-1) + } + fmt.Fprintf(w, format, args...) + io.WriteString(w, "\n") +} diff --git a/vendor/golang.org/x/tools/oracle/peers.go b/vendor/golang.org/x/tools/oracle/peers.go new file mode 100644 index 0000000..9c2a497 --- /dev/null +++ b/vendor/golang.org/x/tools/oracle/peers.go @@ -0,0 +1,252 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package oracle + +import ( + "fmt" + "go/ast" + "go/token" + "sort" + + "golang.org/x/tools/go/loader" + "golang.org/x/tools/go/ssa" + "golang.org/x/tools/go/ssa/ssautil" + "golang.org/x/tools/go/types" + "golang.org/x/tools/oracle/serial" +) + +// peers enumerates, for a given channel send (or receive) operation, +// the set of possible receives (or sends) that correspond to it. +// +// TODO(adonovan): support reflect.{Select,Recv,Send,Close}. +// TODO(adonovan): permit the user to query based on a MakeChan (not send/recv), +// or the implicit receive in "for v := range ch". +func peers(q *Query) error { + lconf := loader.Config{Build: q.Build} + + if err := setPTAScope(&lconf, q.Scope); err != nil { + return err + } + + // Load/parse/type-check the program. + lprog, err := lconf.Load() + if err != nil { + return err + } + q.Fset = lprog.Fset + + qpos, err := parseQueryPos(lprog, q.Pos, false) + if err != nil { + return err + } + + prog := ssautil.CreateProgram(lprog, ssa.GlobalDebug) + + ptaConfig, err := setupPTA(prog, lprog, q.PTALog, q.Reflection) + if err != nil { + return err + } + + opPos := findOp(qpos) + if opPos == token.NoPos { + return fmt.Errorf("there is no channel operation here") + } + + // Defer SSA construction till after errors are reported. + prog.BuildAll() + + var queryOp chanOp // the originating send or receive operation + var ops []chanOp // all sends/receives of opposite direction + + // Look at all channel operations in the whole ssa.Program. + // Build a list of those of same type as the query. + allFuncs := ssautil.AllFunctions(prog) + for fn := range allFuncs { + for _, b := range fn.Blocks { + for _, instr := range b.Instrs { + for _, op := range chanOps(instr) { + ops = append(ops, op) + if op.pos == opPos { + queryOp = op // we found the query op + } + } + } + } + } + if queryOp.ch == nil { + return fmt.Errorf("ssa.Instruction for send/receive not found") + } + + // Discard operations of wrong channel element type. + // Build set of channel ssa.Values as query to pointer analysis. + // We compare channels by element types, not channel types, to + // ignore both directionality and type names. + queryType := queryOp.ch.Type() + queryElemType := queryType.Underlying().(*types.Chan).Elem() + ptaConfig.AddQuery(queryOp.ch) + i := 0 + for _, op := range ops { + if types.Identical(op.ch.Type().Underlying().(*types.Chan).Elem(), queryElemType) { + ptaConfig.AddQuery(op.ch) + ops[i] = op + i++ + } + } + ops = ops[:i] + + // Run the pointer analysis. + ptares := ptrAnalysis(ptaConfig) + + // Find the points-to set. + queryChanPtr := ptares.Queries[queryOp.ch] + + // Ascertain which make(chan) labels the query's channel can alias. + var makes []token.Pos + for _, label := range queryChanPtr.PointsTo().Labels() { + makes = append(makes, label.Pos()) + } + sort.Sort(byPos(makes)) + + // Ascertain which channel operations can alias the same make(chan) labels. + var sends, receives, closes []token.Pos + for _, op := range ops { + if ptr, ok := ptares.Queries[op.ch]; ok && ptr.MayAlias(queryChanPtr) { + switch op.dir { + case types.SendOnly: + sends = append(sends, op.pos) + case types.RecvOnly: + receives = append(receives, op.pos) + case types.SendRecv: + closes = append(closes, op.pos) + } + } + } + sort.Sort(byPos(sends)) + sort.Sort(byPos(receives)) + sort.Sort(byPos(closes)) + + q.result = &peersResult{ + queryPos: opPos, + queryType: queryType, + makes: makes, + sends: sends, + receives: receives, + closes: closes, + } + return nil +} + +// findOp returns the position of the enclosing send/receive/close op. +// For send and receive operations, this is the position of the <- token; +// for close operations, it's the Lparen of the function call. +// +// TODO(adonovan): handle implicit receive operations from 'for...range chan' statements. +func findOp(qpos *queryPos) token.Pos { + for _, n := range qpos.path { + switch n := n.(type) { + case *ast.UnaryExpr: + if n.Op == token.ARROW { + return n.OpPos + } + case *ast.SendStmt: + return n.Arrow + case *ast.CallExpr: + // close function call can only exist as a direct identifier + if close, ok := unparen(n.Fun).(*ast.Ident); ok { + if b, ok := qpos.info.Info.Uses[close].(*types.Builtin); ok && b.Name() == "close" { + return n.Lparen + } + } + } + } + return token.NoPos +} + +// chanOp abstracts an ssa.Send, ssa.Unop(ARROW), or a SelectState. +type chanOp struct { + ch ssa.Value + dir types.ChanDir // SendOnly=send, RecvOnly=recv, SendRecv=close + pos token.Pos +} + +// chanOps returns a slice of all the channel operations in the instruction. +func chanOps(instr ssa.Instruction) []chanOp { + // TODO(adonovan): handle calls to reflect.{Select,Recv,Send,Close} too. + var ops []chanOp + switch instr := instr.(type) { + case *ssa.UnOp: + if instr.Op == token.ARROW { + ops = append(ops, chanOp{instr.X, types.RecvOnly, instr.Pos()}) + } + case *ssa.Send: + ops = append(ops, chanOp{instr.Chan, types.SendOnly, instr.Pos()}) + case *ssa.Select: + for _, st := range instr.States { + ops = append(ops, chanOp{st.Chan, st.Dir, st.Pos}) + } + case ssa.CallInstruction: + cc := instr.Common() + if b, ok := cc.Value.(*ssa.Builtin); ok && b.Name() == "close" { + ops = append(ops, chanOp{cc.Args[0], types.SendRecv, cc.Pos()}) + } + } + return ops +} + +type peersResult struct { + queryPos token.Pos // of queried channel op + queryType types.Type // type of queried channel + makes, sends, receives, closes []token.Pos // positions of aliased makechan/send/receive/close instrs +} + +func (r *peersResult) display(printf printfFunc) { + if len(r.makes) == 0 { + printf(r.queryPos, "This channel can't point to anything.") + return + } + printf(r.queryPos, "This channel of type %s may be:", r.queryType) + for _, alloc := range r.makes { + printf(alloc, "\tallocated here") + } + for _, send := range r.sends { + printf(send, "\tsent to, here") + } + for _, receive := range r.receives { + printf(receive, "\treceived from, here") + } + for _, clos := range r.closes { + printf(clos, "\tclosed, here") + } +} + +func (r *peersResult) toSerial(res *serial.Result, fset *token.FileSet) { + peers := &serial.Peers{ + Pos: fset.Position(r.queryPos).String(), + Type: r.queryType.String(), + } + for _, alloc := range r.makes { + peers.Allocs = append(peers.Allocs, fset.Position(alloc).String()) + } + for _, send := range r.sends { + peers.Sends = append(peers.Sends, fset.Position(send).String()) + } + for _, receive := range r.receives { + peers.Receives = append(peers.Receives, fset.Position(receive).String()) + } + for _, clos := range r.closes { + peers.Closes = append(peers.Closes, fset.Position(clos).String()) + } + res.Peers = peers +} + +// -------- utils -------- + +// NB: byPos is not deterministic across packages since it depends on load order. +// Use lessPos if the tests need it. +type byPos []token.Pos + +func (p byPos) Len() int { return len(p) } +func (p byPos) Less(i, j int) bool { return p[i] < p[j] } +func (p byPos) Swap(i, j int) { p[i], p[j] = p[j], p[i] } diff --git a/vendor/golang.org/x/tools/oracle/pointsto.go b/vendor/golang.org/x/tools/oracle/pointsto.go new file mode 100644 index 0000000..d366dd3 --- /dev/null +++ b/vendor/golang.org/x/tools/oracle/pointsto.go @@ -0,0 +1,291 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package oracle + +import ( + "fmt" + "go/ast" + "go/token" + "sort" + + "golang.org/x/tools/go/ast/astutil" + "golang.org/x/tools/go/loader" + "golang.org/x/tools/go/pointer" + "golang.org/x/tools/go/ssa" + "golang.org/x/tools/go/ssa/ssautil" + "golang.org/x/tools/go/types" + "golang.org/x/tools/oracle/serial" +) + +// pointsto runs the pointer analysis on the selected expression, +// and reports its points-to set (for a pointer-like expression) +// or its dynamic types (for an interface, reflect.Value, or +// reflect.Type expression) and their points-to sets. +// +// All printed sets are sorted to ensure determinism. +// +func pointsto(q *Query) error { + lconf := loader.Config{Build: q.Build} + + if err := setPTAScope(&lconf, q.Scope); err != nil { + return err + } + + // Load/parse/type-check the program. + lprog, err := lconf.Load() + if err != nil { + return err + } + q.Fset = lprog.Fset + + qpos, err := parseQueryPos(lprog, q.Pos, true) // needs exact pos + if err != nil { + return err + } + + prog := ssautil.CreateProgram(lprog, ssa.GlobalDebug) + + ptaConfig, err := setupPTA(prog, lprog, q.PTALog, q.Reflection) + if err != nil { + return err + } + + path, action := findInterestingNode(qpos.info, qpos.path) + if action != actionExpr { + return fmt.Errorf("pointer analysis wants an expression; got %s", + astutil.NodeDescription(qpos.path[0])) + } + + var expr ast.Expr + var obj types.Object + switch n := path[0].(type) { + case *ast.ValueSpec: + // ambiguous ValueSpec containing multiple names + return fmt.Errorf("multiple value specification") + case *ast.Ident: + obj = qpos.info.ObjectOf(n) + expr = n + case ast.Expr: + expr = n + default: + // TODO(adonovan): is this reachable? + return fmt.Errorf("unexpected AST for expr: %T", n) + } + + // Reject non-pointerlike types (includes all constants---except nil). + // TODO(adonovan): reject nil too. + typ := qpos.info.TypeOf(expr) + if !pointer.CanPoint(typ) { + return fmt.Errorf("pointer analysis wants an expression of reference type; got %s", typ) + } + + // Determine the ssa.Value for the expression. + var value ssa.Value + var isAddr bool + if obj != nil { + // def/ref of func/var object + value, isAddr, err = ssaValueForIdent(prog, qpos.info, obj, path) + } else { + value, isAddr, err = ssaValueForExpr(prog, qpos.info, path) + } + if err != nil { + return err // e.g. trivially dead code + } + + // Defer SSA construction till after errors are reported. + prog.BuildAll() + + // Run the pointer analysis. + ptrs, err := runPTA(ptaConfig, value, isAddr) + if err != nil { + return err // e.g. analytically unreachable + } + + q.result = &pointstoResult{ + qpos: qpos, + typ: typ, + ptrs: ptrs, + } + return nil +} + +// ssaValueForIdent returns the ssa.Value for the ast.Ident whose path +// to the root of the AST is path. isAddr reports whether the +// ssa.Value is the address denoted by the ast.Ident, not its value. +// +func ssaValueForIdent(prog *ssa.Program, qinfo *loader.PackageInfo, obj types.Object, path []ast.Node) (value ssa.Value, isAddr bool, err error) { + switch obj := obj.(type) { + case *types.Var: + pkg := prog.Package(qinfo.Pkg) + pkg.Build() + if v, addr := prog.VarValue(obj, pkg, path); v != nil { + return v, addr, nil + } + return nil, false, fmt.Errorf("can't locate SSA Value for var %s", obj.Name()) + + case *types.Func: + fn := prog.FuncValue(obj) + if fn == nil { + return nil, false, fmt.Errorf("%s is an interface method", obj) + } + // TODO(adonovan): there's no point running PTA on a *Func ident. + // Eliminate this feature. + return fn, false, nil + } + panic(obj) +} + +// ssaValueForExpr returns the ssa.Value of the non-ast.Ident +// expression whose path to the root of the AST is path. +// +func ssaValueForExpr(prog *ssa.Program, qinfo *loader.PackageInfo, path []ast.Node) (value ssa.Value, isAddr bool, err error) { + pkg := prog.Package(qinfo.Pkg) + pkg.SetDebugMode(true) + pkg.Build() + + fn := ssa.EnclosingFunction(pkg, path) + if fn == nil { + return nil, false, fmt.Errorf("no SSA function built for this location (dead code?)") + } + + if v, addr := fn.ValueForExpr(path[0].(ast.Expr)); v != nil { + return v, addr, nil + } + + return nil, false, fmt.Errorf("can't locate SSA Value for expression in %s", fn) +} + +// runPTA runs the pointer analysis of the selected SSA value or address. +func runPTA(conf *pointer.Config, v ssa.Value, isAddr bool) (ptrs []pointerResult, err error) { + T := v.Type() + if isAddr { + conf.AddIndirectQuery(v) + T = deref(T) + } else { + conf.AddQuery(v) + } + ptares := ptrAnalysis(conf) + + var ptr pointer.Pointer + if isAddr { + ptr = ptares.IndirectQueries[v] + } else { + ptr = ptares.Queries[v] + } + if ptr == (pointer.Pointer{}) { + return nil, fmt.Errorf("pointer analysis did not find expression (dead code?)") + } + pts := ptr.PointsTo() + + if pointer.CanHaveDynamicTypes(T) { + // Show concrete types for interface/reflect.Value expression. + if concs := pts.DynamicTypes(); concs.Len() > 0 { + concs.Iterate(func(conc types.Type, pta interface{}) { + labels := pta.(pointer.PointsToSet).Labels() + sort.Sort(byPosAndString(labels)) // to ensure determinism + ptrs = append(ptrs, pointerResult{conc, labels}) + }) + } + } else { + // Show labels for other expressions. + labels := pts.Labels() + sort.Sort(byPosAndString(labels)) // to ensure determinism + ptrs = append(ptrs, pointerResult{T, labels}) + } + sort.Sort(byTypeString(ptrs)) // to ensure determinism + return ptrs, nil +} + +type pointerResult struct { + typ types.Type // type of the pointer (always concrete) + labels []*pointer.Label // set of labels +} + +type pointstoResult struct { + qpos *queryPos + typ types.Type // type of expression + ptrs []pointerResult // pointer info (typ is concrete => len==1) +} + +func (r *pointstoResult) display(printf printfFunc) { + if pointer.CanHaveDynamicTypes(r.typ) { + // Show concrete types for interface, reflect.Type or + // reflect.Value expression. + + if len(r.ptrs) > 0 { + printf(r.qpos, "this %s may contain these dynamic types:", r.qpos.typeString(r.typ)) + for _, ptr := range r.ptrs { + var obj types.Object + if nt, ok := deref(ptr.typ).(*types.Named); ok { + obj = nt.Obj() + } + if len(ptr.labels) > 0 { + printf(obj, "\t%s, may point to:", r.qpos.typeString(ptr.typ)) + printLabels(printf, ptr.labels, "\t\t") + } else { + printf(obj, "\t%s", r.qpos.typeString(ptr.typ)) + } + } + } else { + printf(r.qpos, "this %s cannot contain any dynamic types.", r.typ) + } + } else { + // Show labels for other expressions. + if ptr := r.ptrs[0]; len(ptr.labels) > 0 { + printf(r.qpos, "this %s may point to these objects:", + r.qpos.typeString(r.typ)) + printLabels(printf, ptr.labels, "\t") + } else { + printf(r.qpos, "this %s may not point to anything.", + r.qpos.typeString(r.typ)) + } + } +} + +func (r *pointstoResult) toSerial(res *serial.Result, fset *token.FileSet) { + var pts []serial.PointsTo + for _, ptr := range r.ptrs { + var namePos string + if nt, ok := deref(ptr.typ).(*types.Named); ok { + namePos = fset.Position(nt.Obj().Pos()).String() + } + var labels []serial.PointsToLabel + for _, l := range ptr.labels { + labels = append(labels, serial.PointsToLabel{ + Pos: fset.Position(l.Pos()).String(), + Desc: l.String(), + }) + } + pts = append(pts, serial.PointsTo{ + Type: r.qpos.typeString(ptr.typ), + NamePos: namePos, + Labels: labels, + }) + } + res.PointsTo = pts +} + +type byTypeString []pointerResult + +func (a byTypeString) Len() int { return len(a) } +func (a byTypeString) Less(i, j int) bool { return a[i].typ.String() < a[j].typ.String() } +func (a byTypeString) Swap(i, j int) { a[i], a[j] = a[j], a[i] } + +type byPosAndString []*pointer.Label + +func (a byPosAndString) Len() int { return len(a) } +func (a byPosAndString) Less(i, j int) bool { + cmp := a[i].Pos() - a[j].Pos() + return cmp < 0 || (cmp == 0 && a[i].String() < a[j].String()) +} +func (a byPosAndString) Swap(i, j int) { a[i], a[j] = a[j], a[i] } + +func printLabels(printf printfFunc, labels []*pointer.Label, prefix string) { + // TODO(adonovan): due to context-sensitivity, many of these + // labels may differ only by context, which isn't apparent. + for _, label := range labels { + printf(label, "%s%s", prefix, label) + } +} diff --git a/vendor/golang.org/x/tools/oracle/pos.go b/vendor/golang.org/x/tools/oracle/pos.go new file mode 100644 index 0000000..3c706f3 --- /dev/null +++ b/vendor/golang.org/x/tools/oracle/pos.go @@ -0,0 +1,143 @@ +package oracle + +// This file defines utilities for working with file positions. + +import ( + "fmt" + "go/parser" + "go/token" + "os" + "path/filepath" + "strconv" + "strings" + + "golang.org/x/tools/go/ast/astutil" +) + +// parseOctothorpDecimal returns the numeric value if s matches "#%d", +// otherwise -1. +func parseOctothorpDecimal(s string) int { + if s != "" && s[0] == '#' { + if s, err := strconv.ParseInt(s[1:], 10, 32); err == nil { + return int(s) + } + } + return -1 +} + +// parsePosFlag parses a string of the form "file:pos" or +// file:start,end" where pos, start, end match #%d and represent byte +// offsets, and returns its components. +// +// (Numbers without a '#' prefix are reserved for future use, +// e.g. to indicate line/column positions.) +// +func parsePosFlag(posFlag string) (filename string, startOffset, endOffset int, err error) { + if posFlag == "" { + err = fmt.Errorf("no source position specified (-pos flag)") + return + } + + colon := strings.LastIndex(posFlag, ":") + if colon < 0 { + err = fmt.Errorf("invalid source position -pos=%q", posFlag) + return + } + filename, offset := posFlag[:colon], posFlag[colon+1:] + startOffset = -1 + endOffset = -1 + if hyphen := strings.Index(offset, ","); hyphen < 0 { + // e.g. "foo.go:#123" + startOffset = parseOctothorpDecimal(offset) + endOffset = startOffset + } else { + // e.g. "foo.go:#123,#456" + startOffset = parseOctothorpDecimal(offset[:hyphen]) + endOffset = parseOctothorpDecimal(offset[hyphen+1:]) + } + if startOffset < 0 || endOffset < 0 { + err = fmt.Errorf("invalid -pos offset %q", offset) + return + } + return +} + +// findQueryPos searches fset for filename and translates the +// specified file-relative byte offsets into token.Pos form. It +// returns an error if the file was not found or the offsets were out +// of bounds. +// +func findQueryPos(fset *token.FileSet, filename string, startOffset, endOffset int) (start, end token.Pos, err error) { + var file *token.File + fset.Iterate(func(f *token.File) bool { + if sameFile(filename, f.Name()) { + // (f.Name() is absolute) + file = f + return false // done + } + return true // continue + }) + if file == nil { + err = fmt.Errorf("couldn't find file containing position") + return + } + + // Range check [start..end], inclusive of both end-points. + + if 0 <= startOffset && startOffset <= file.Size() { + start = file.Pos(int(startOffset)) + } else { + err = fmt.Errorf("start position is beyond end of file") + return + } + + if 0 <= endOffset && endOffset <= file.Size() { + end = file.Pos(int(endOffset)) + } else { + err = fmt.Errorf("end position is beyond end of file") + return + } + + return +} + +// sameFile returns true if x and y have the same basename and denote +// the same file. +// +func sameFile(x, y string) bool { + if filepath.Base(x) == filepath.Base(y) { // (optimisation) + if xi, err := os.Stat(x); err == nil { + if yi, err := os.Stat(y); err == nil { + return os.SameFile(xi, yi) + } + } + } + return false +} + +// fastQueryPos parses the -pos flag and returns a QueryPos. +// It parses only a single file, and does not run the type checker. +func fastQueryPos(posFlag string) (*queryPos, error) { + filename, startOffset, endOffset, err := parsePosFlag(posFlag) + if err != nil { + return nil, err + } + + fset := token.NewFileSet() + f, err := parser.ParseFile(fset, filename, nil, 0) + if err != nil { + return nil, err + } + + start, end, err := findQueryPos(fset, filename, startOffset, endOffset) + if err != nil { + return nil, err + } + + path, exact := astutil.PathEnclosingInterval(f, start, end) + if path == nil { + return nil, fmt.Errorf("no syntax here") + } + + return &queryPos{fset, start, end, path, exact, nil}, nil +} diff --git a/vendor/golang.org/x/tools/oracle/referrers.go b/vendor/golang.org/x/tools/oracle/referrers.go new file mode 100644 index 0000000..7383d1f --- /dev/null +++ b/vendor/golang.org/x/tools/oracle/referrers.go @@ -0,0 +1,225 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package oracle + +import ( + "bytes" + "fmt" + "go/ast" + "go/token" + "io/ioutil" + "sort" + + "golang.org/x/tools/go/loader" + "golang.org/x/tools/go/types" + "golang.org/x/tools/oracle/serial" + "golang.org/x/tools/refactor/importgraph" +) + +// Referrers reports all identifiers that resolve to the same object +// as the queried identifier, within any package in the analysis scope. +func referrers(q *Query) error { + lconf := loader.Config{Build: q.Build} + allowErrors(&lconf) + + if err := importQueryPackage(q.Pos, &lconf); err != nil { + return err + } + + var id *ast.Ident + var obj types.Object + var lprog *loader.Program + var pass2 bool + var qpos *queryPos + for { + // Load/parse/type-check the program. + var err error + lprog, err = lconf.Load() + if err != nil { + return err + } + q.Fset = lprog.Fset + + qpos, err = parseQueryPos(lprog, q.Pos, false) + if err != nil { + return err + } + + id, _ = qpos.path[0].(*ast.Ident) + if id == nil { + return fmt.Errorf("no identifier here") + } + + obj = qpos.info.ObjectOf(id) + if obj == nil { + // Happens for y in "switch y := x.(type)", + // the package declaration, + // and unresolved identifiers. + if _, ok := qpos.path[1].(*ast.File); ok { // package decl? + pkg := qpos.info.Pkg + obj = types.NewPkgName(id.Pos(), pkg, pkg.Name(), pkg) + } else { + return fmt.Errorf("no object for identifier: %T", qpos.path[1]) + } + } + + if pass2 { + break + } + + // If the identifier is exported, we must load all packages that + // depend transitively upon the package that defines it. + // Treat PkgNames as exported, even though they're lowercase. + if _, isPkg := obj.(*types.PkgName); !(isPkg || obj.Exported()) { + break // not exported + } + + // Scan the workspace and build the import graph. + // Ignore broken packages. + _, rev, _ := importgraph.Build(q.Build) + + // Re-load the larger program. + // Create a new file set so that ... + // External test packages are never imported, + // so they will never appear in the graph. + // (We must reset the Config here, not just reset the Fset field.) + lconf = loader.Config{ + Fset: token.NewFileSet(), + Build: q.Build, + } + allowErrors(&lconf) + for path := range rev.Search(obj.Pkg().Path()) { + lconf.ImportWithTests(path) + } + pass2 = true + } + + // Iterate over all go/types' Uses facts for the entire program. + var refs []*ast.Ident + for _, info := range lprog.AllPackages { + for id2, obj2 := range info.Uses { + if sameObj(obj, obj2) { + refs = append(refs, id2) + } + } + } + sort.Sort(byNamePos{q.Fset, refs}) + + q.result = &referrersResult{ + qpos: qpos, + query: id, + obj: obj, + refs: refs, + } + return nil +} + +// same reports whether x and y are identical, or both are PkgNames +// that import the same Package. +// +func sameObj(x, y types.Object) bool { + if x == y { + return true + } + if x, ok := x.(*types.PkgName); ok { + if y, ok := y.(*types.PkgName); ok { + return x.Imported() == y.Imported() + } + } + return false +} + +// -------- utils -------- + +// An deterministic ordering for token.Pos that doesn't +// depend on the order in which packages were loaded. +func lessPos(fset *token.FileSet, x, y token.Pos) bool { + fx := fset.File(x) + fy := fset.File(y) + if fx != fy { + return fx.Name() < fy.Name() + } + return x < y +} + +type byNamePos struct { + fset *token.FileSet + ids []*ast.Ident +} + +func (p byNamePos) Len() int { return len(p.ids) } +func (p byNamePos) Swap(i, j int) { p.ids[i], p.ids[j] = p.ids[j], p.ids[i] } +func (p byNamePos) Less(i, j int) bool { + return lessPos(p.fset, p.ids[i].NamePos, p.ids[j].NamePos) +} + +type referrersResult struct { + qpos *queryPos + query *ast.Ident // identifier of query + obj types.Object // object it denotes + refs []*ast.Ident // set of all other references to it +} + +func (r *referrersResult) display(printf printfFunc) { + printf(r.obj, "%d references to %s", len(r.refs), r.qpos.objectString(r.obj)) + + // Show referring lines, like grep. + type fileinfo struct { + refs []*ast.Ident + linenums []int // line number of refs[i] + data chan []byte // file contents + } + var fileinfos []*fileinfo + fileinfosByName := make(map[string]*fileinfo) + + // First pass: start the file reads concurrently. + for _, ref := range r.refs { + posn := r.qpos.fset.Position(ref.Pos()) + fi := fileinfosByName[posn.Filename] + if fi == nil { + fi = &fileinfo{data: make(chan []byte)} + fileinfosByName[posn.Filename] = fi + fileinfos = append(fileinfos, fi) + + // First request for this file: + // start asynchronous read. + go func() { + content, err := ioutil.ReadFile(posn.Filename) + if err != nil { + content = []byte(fmt.Sprintf("error: %v", err)) + } + fi.data <- content + }() + } + fi.refs = append(fi.refs, ref) + fi.linenums = append(fi.linenums, posn.Line) + } + + // Second pass: print refs in original order. + // One line may have several refs at different columns. + for _, fi := range fileinfos { + content := <-fi.data // wait for I/O completion + lines := bytes.Split(content, []byte("\n")) + for i, ref := range fi.refs { + printf(ref, "%s", lines[fi.linenums[i]-1]) + } + } +} + +// TODO(adonovan): encode extent, not just Pos info, in Serial form. + +func (r *referrersResult) toSerial(res *serial.Result, fset *token.FileSet) { + referrers := &serial.Referrers{ + Pos: fset.Position(r.query.Pos()).String(), + Desc: r.obj.String(), + } + if pos := r.obj.Pos(); pos != token.NoPos { // Package objects have no Pos() + referrers.ObjPos = fset.Position(pos).String() + } + for _, ref := range r.refs { + referrers.Refs = append(referrers.Refs, fset.Position(ref.NamePos).String()) + } + res.Referrers = referrers +} diff --git a/vendor/golang.org/x/tools/oracle/serial/serial.go b/vendor/golang.org/x/tools/oracle/serial/serial.go new file mode 100644 index 0000000..65f0822 --- /dev/null +++ b/vendor/golang.org/x/tools/oracle/serial/serial.go @@ -0,0 +1,258 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Package serial defines the oracle's schema for structured data +// serialization using JSON, XML, etc. +package serial + +// All 'pos' strings are of the form "file:line:col". +// TODO(adonovan): improve performance by sharing filename strings. +// TODO(adonovan): improve precision by providing the start/end +// interval when available. +// +// TODO(adonovan): consider richer encodings of types, functions, +// methods, etc. + +// A Peers is the result of a 'peers' query. +// If Allocs is empty, the selected channel can't point to anything. +type Peers struct { + Pos string `json:"pos"` // location of the selected channel op (<-) + Type string `json:"type"` // type of the selected channel + Allocs []string `json:"allocs,omitempty"` // locations of aliased make(chan) ops + Sends []string `json:"sends,omitempty"` // locations of aliased ch<-x ops + Receives []string `json:"receives,omitempty"` // locations of aliased <-ch ops + Closes []string `json:"closes,omitempty"` // locations of aliased close(ch) ops +} + +// A Referrers is the result of a 'referrers' query. +type Referrers struct { + Pos string `json:"pos"` // location of the query reference + ObjPos string `json:"objpos,omitempty"` // location of the definition + Desc string `json:"desc"` // description of the denoted object + Refs []string `json:"refs,omitempty"` // locations of all references +} + +// A Definition is the result of a 'definition' query. +type Definition struct { + ObjPos string `json:"objpos,omitempty"` // location of the definition + Desc string `json:"desc"` // description of the denoted object +} + +type CalleesItem struct { + Name string `json:"name"` // full name of called function + Pos string `json:"pos"` // location of called function +} + +// A Callees is the result of a 'callees' query. +// +// Callees is nonempty unless the call was a dynamic call on a +// provably nil func or interface value. +type Callees struct { + Pos string `json:"pos"` // location of selected call site + Desc string `json:"desc"` // description of call site + Callees []*CalleesItem `json:"callees,omitempty"` // set of possible call targets +} + +// A Caller is one element of the slice returned by a 'callers' query. +// (Callstack also contains a similar slice.) +// +// The root of the callgraph has an unspecified "Caller" string. +type Caller struct { + Pos string `json:"pos,omitempty"` // location of the calling function + Desc string `json:"desc"` // description of call site + Caller string `json:"caller"` // full name of calling function +} + +// A CallStack is the result of a 'callstack' query. +// It indicates an arbitrary path from the root of the callgraph to +// the query function. +// +// If the Callers slice is empty, the function was unreachable in this +// analysis scope. +type CallStack struct { + Pos string `json:"pos"` // location of the selected function + Target string `json:"target"` // the selected function + Callers []Caller `json:"callers"` // enclosing calls, innermost first. +} + +// A FreeVar is one element of the slice returned by a 'freevars' +// query. Each one identifies an expression referencing a local +// identifier defined outside the selected region. +type FreeVar struct { + Pos string `json:"pos"` // location of the identifier's definition + Kind string `json:"kind"` // one of {var,func,type,const,label} + Ref string `json:"ref"` // referring expression (e.g. "x" or "x.y.z") + Type string `json:"type"` // type of the expression +} + +// An Implements contains the result of an 'implements' query. +// It describes the queried type, the set of named non-empty interface +// types to which it is assignable, and the set of named/*named types +// (concrete or non-empty interface) which may be assigned to it. +// +type Implements struct { + T ImplementsType `json:"type,omitempty"` // the queried type + AssignableTo []ImplementsType `json:"to,omitempty"` // types assignable to T + AssignableFrom []ImplementsType `json:"from,omitempty"` // interface types assignable from T + AssignableFromPtr []ImplementsType `json:"fromptr,omitempty"` // interface types assignable only from *T + + // The following fields are set only if the query was a method. + // Assignable{To,From,FromPtr}Method[i] is the corresponding + // method of type Assignable{To,From,FromPtr}[i], or blank + // {"",""} if that type lacks the method. + Method *DescribeMethod `json:"method,omitempty"` // the queried method + AssignableToMethod []DescribeMethod `json:"to_method,omitempty"` + AssignableFromMethod []DescribeMethod `json:"from_method,omitempty"` + AssignableFromPtrMethod []DescribeMethod `json:"fromptr_method,omitempty"` +} + +// An ImplementsType describes a single type as part of an 'implements' query. +type ImplementsType struct { + Name string `json:"name"` // full name of the type + Pos string `json:"pos"` // location of its definition + Kind string `json:"kind"` // "basic", "array", etc +} + +// A SyntaxNode is one element of a stack of enclosing syntax nodes in +// a "what" query. +type SyntaxNode struct { + Description string `json:"desc"` // description of syntax tree + Start int `json:"start"` // start byte offset, 0-based + End int `json:"end"` // end byte offset +} + +// A What is the result of the "what" query, which quickly identifies +// the selection, parsing only a single file. It is intended for use +// in low-latency GUIs. +type What struct { + Enclosing []SyntaxNode `json:"enclosing"` // enclosing nodes of syntax tree + Modes []string `json:"modes"` // query modes enabled for this selection. + SrcDir string `json:"srcdir,omitempty"` // $GOROOT src directory containing queried package + ImportPath string `json:"importpath,omitempty"` // import path of queried package +} + +// A PointsToLabel describes a pointer analysis label. +// +// A "label" is an object that may be pointed to by a pointer, map, +// channel, 'func', slice or interface. Labels include: +// - functions +// - globals +// - arrays created by literals (e.g. []byte("foo")) and conversions ([]byte(s)) +// - stack- and heap-allocated variables (including composite literals) +// - arrays allocated by append() +// - channels, maps and arrays created by make() +// - and their subelements, e.g. "alloc.y[*].z" +// +type PointsToLabel struct { + Pos string `json:"pos"` // location of syntax that allocated the object + Desc string `json:"desc"` // description of the label +} + +// A PointsTo is one element of the result of a 'pointsto' query on an +// expression. It describes a single pointer: its type and the set of +// "labels" it points to. +// +// If the pointer is of interface type, it will have one PTS entry +// describing each concrete type that it may contain. For each +// concrete type that is a pointer, the PTS entry describes the labels +// it may point to. The same is true for reflect.Values, except the +// dynamic types needn't be concrete. +// +type PointsTo struct { + Type string `json:"type"` // (concrete) type of the pointer + NamePos string `json:"namepos,omitempty"` // location of type defn, if Named + Labels []PointsToLabel `json:"labels,omitempty"` // pointed-to objects +} + +// A DescribeValue is the additional result of a 'describe' query +// if the selection indicates a value or expression. +type DescribeValue struct { + Type string `json:"type"` // type of the expression + Value string `json:"value,omitempty"` // value of the expression, if constant + ObjPos string `json:"objpos,omitempty"` // location of the definition, if an Ident +} + +type DescribeMethod struct { + Name string `json:"name"` // method name, as defined by types.Selection.String() + Pos string `json:"pos"` // location of the method's definition +} + +// A DescribeType is the additional result of a 'describe' query +// if the selection indicates a type. +type DescribeType struct { + Type string `json:"type"` // the string form of the type + NamePos string `json:"namepos,omitempty"` // location of definition of type, if named + NameDef string `json:"namedef,omitempty"` // underlying definition of type, if named + Methods []DescribeMethod `json:"methods,omitempty"` // methods of the type +} + +type DescribeMember struct { + Name string `json:"name"` // name of member + Type string `json:"type,omitempty"` // type of member (underlying, if 'type') + Value string `json:"value,omitempty"` // value of member (if 'const') + Pos string `json:"pos"` // location of definition of member + Kind string `json:"kind"` // one of {var,const,func,type} + Methods []DescribeMethod `json:"methods,omitempty"` // methods (if member is a type) +} + +// A DescribePackage is the additional result of a 'describe' if +// the selection indicates a package. +type DescribePackage struct { + Path string `json:"path"` // import path of the package + Members []*DescribeMember `json:"members,omitempty"` // accessible members of the package +} + +// A Describe is the result of a 'describe' query. +// It may contain an element describing the selected semantic entity +// in detail. +type Describe struct { + Desc string `json:"desc"` // description of the selected syntax node + Pos string `json:"pos"` // location of the selected syntax node + Detail string `json:"detail,omitempty"` // one of {package, type, value}, or "". + + // At most one of the following fields is populated: + // the one specified by 'detail'. + Package *DescribePackage `json:"package,omitempty"` + Type *DescribeType `json:"type,omitempty"` + Value *DescribeValue `json:"value,omitempty"` +} + +// A WhichErrs is the result of a 'whicherrs' query. +// It contains the position of the queried error and the possible globals, +// constants, and types it may point to. +type WhichErrs struct { + ErrPos string `json:"errpos,omitempty"` // location of queried error + Globals []string `json:"globals,omitempty"` // locations of globals + Constants []string `json:"constants,omitempty"` // locations of constants + Types []WhichErrsType `json:"types,omitempty"` // Types +} + +type WhichErrsType struct { + Type string `json:"type,omitempty"` + Position string `json:"position,omitempty"` +} + +// A Result is the common result of any oracle query. +// It contains a query-specific result element. +// +// TODO(adonovan): perhaps include other info such as: analysis scope, +// raw query position, stack of ast nodes, query package, etc. +type Result struct { + Mode string `json:"mode"` // mode of the query + + // Exactly one of the following fields is populated: + // the one specified by 'mode'. + Callees *Callees `json:"callees,omitempty"` + Callers []Caller `json:"callers,omitempty"` + Callstack *CallStack `json:"callstack,omitempty"` + Definition *Definition `json:"definition,omitempty"` + Describe *Describe `json:"describe,omitempty"` + Freevars []*FreeVar `json:"freevars,omitempty"` + Implements *Implements `json:"implements,omitempty"` + Peers *Peers `json:"peers,omitempty"` + PointsTo []PointsTo `json:"pointsto,omitempty"` + Referrers *Referrers `json:"referrers,omitempty"` + What *What `json:"what,omitempty"` + WhichErrs *WhichErrs `json:"whicherrs,omitempty"` +} diff --git a/vendor/golang.org/x/tools/oracle/what.go b/vendor/golang.org/x/tools/oracle/what.go new file mode 100644 index 0000000..5a5c0cf --- /dev/null +++ b/vendor/golang.org/x/tools/oracle/what.go @@ -0,0 +1,210 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package oracle + +import ( + "fmt" + "go/ast" + "go/build" + "go/token" + "os" + "path/filepath" + "sort" + "strings" + + "golang.org/x/tools/go/ast/astutil" + "golang.org/x/tools/oracle/serial" +) + +// what reports all the information about the query selection that can be +// obtained from parsing only its containing source file. +// It is intended to be a very low-latency query callable from GUI +// tools, e.g. to populate a menu of options of slower queries about +// the selected location. +// +func what(q *Query) error { + qpos, err := fastQueryPos(q.Pos) + if err != nil { + return err + } + q.Fset = qpos.fset + + // (ignore errors) + srcdir, importPath, _ := guessImportPath(q.Fset.File(qpos.start).Name(), q.Build) + + // Determine which query modes are applicable to the selection. + enable := map[string]bool{ + "describe": true, // any syntax; always enabled + } + + if qpos.end > qpos.start { + enable["freevars"] = true // nonempty selection? + } + + for _, n := range qpos.path { + switch n := n.(type) { + case *ast.Ident: + enable["definition"] = true + enable["referrers"] = true + enable["implements"] = true + case *ast.CallExpr: + enable["callees"] = true + case *ast.FuncDecl: + enable["callers"] = true + enable["callstack"] = true + case *ast.SendStmt: + enable["peers"] = true + case *ast.UnaryExpr: + if n.Op == token.ARROW { + enable["peers"] = true + } + } + + // For implements, we approximate findInterestingNode. + if _, ok := enable["implements"]; !ok { + switch n.(type) { + case *ast.ArrayType, + *ast.StructType, + *ast.FuncType, + *ast.InterfaceType, + *ast.MapType, + *ast.ChanType: + enable["implements"] = true + } + } + + // For pointsto, we approximate findInterestingNode. + if _, ok := enable["pointsto"]; !ok { + switch n.(type) { + case ast.Stmt, + *ast.ArrayType, + *ast.StructType, + *ast.FuncType, + *ast.InterfaceType, + *ast.MapType, + *ast.ChanType: + enable["pointsto"] = false // not an expr + + case ast.Expr, ast.Decl, *ast.ValueSpec: + enable["pointsto"] = true // an expr, maybe + + default: + // Comment, Field, KeyValueExpr, etc: ascend. + } + } + } + + // If we don't have an exact selection, disable modes that need one. + if !qpos.exact { + enable["callees"] = false + enable["pointsto"] = false + enable["whicherrs"] = false + enable["describe"] = false + } + + var modes []string + for mode := range enable { + modes = append(modes, mode) + } + sort.Strings(modes) + + q.result = &whatResult{ + path: qpos.path, + srcdir: srcdir, + importPath: importPath, + modes: modes, + } + return nil +} + +// guessImportPath finds the package containing filename, and returns +// its source directory (an element of $GOPATH) and its import path +// relative to it. +// +// TODO(adonovan): what about _test.go files that are not part of the +// package? +// +func guessImportPath(filename string, buildContext *build.Context) (srcdir, importPath string, err error) { + absFile, err := filepath.Abs(filename) + if err != nil { + err = fmt.Errorf("can't form absolute path of %s", filename) + return + } + absFileDir := segments(filepath.Dir(absFile)) + + // Find the innermost directory in $GOPATH that encloses filename. + minD := 1024 + for _, gopathDir := range buildContext.SrcDirs() { + absDir, err := filepath.Abs(gopathDir) + if err != nil { + continue // e.g. non-existent dir on $GOPATH + } + d := prefixLen(segments(absDir), absFileDir) + // If there are multiple matches, + // prefer the innermost enclosing directory + // (smallest d). + if d >= 0 && d < minD { + minD = d + srcdir = gopathDir + importPath = strings.Join(absFileDir[len(absFileDir)-minD:], string(os.PathSeparator)) + } + } + if srcdir == "" { + err = fmt.Errorf("directory %s is not beneath any of these GOROOT/GOPATH directories: %s", + filepath.Dir(absFile), strings.Join(buildContext.SrcDirs(), ", ")) + } + return +} + +func segments(path string) []string { + return strings.Split(path, string(os.PathSeparator)) +} + +// prefixLen returns the length of the remainder of y if x is a prefix +// of y, a negative number otherwise. +func prefixLen(x, y []string) int { + d := len(y) - len(x) + if d >= 0 { + for i := range x { + if y[i] != x[i] { + return -1 // not a prefix + } + } + } + return d +} + +type whatResult struct { + path []ast.Node + modes []string + srcdir string + importPath string +} + +func (r *whatResult) display(printf printfFunc) { + for _, n := range r.path { + printf(n, "%s", astutil.NodeDescription(n)) + } + printf(nil, "modes: %s", r.modes) + printf(nil, "srcdir: %s", r.srcdir) + printf(nil, "import path: %s", r.importPath) +} + +func (r *whatResult) toSerial(res *serial.Result, fset *token.FileSet) { + var enclosing []serial.SyntaxNode + for _, n := range r.path { + enclosing = append(enclosing, serial.SyntaxNode{ + Description: astutil.NodeDescription(n), + Start: fset.Position(n.Pos()).Offset, + End: fset.Position(n.End()).Offset, + }) + } + res.What = &serial.What{ + Modes: r.modes, + SrcDir: r.srcdir, + ImportPath: r.importPath, + Enclosing: enclosing, + } +} diff --git a/vendor/golang.org/x/tools/oracle/whicherrs.go b/vendor/golang.org/x/tools/oracle/whicherrs.go new file mode 100644 index 0000000..aaa6068 --- /dev/null +++ b/vendor/golang.org/x/tools/oracle/whicherrs.go @@ -0,0 +1,326 @@ +// Copyright 2014 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package oracle + +import ( + "fmt" + "go/ast" + "go/token" + "sort" + + "golang.org/x/tools/go/ast/astutil" + "golang.org/x/tools/go/loader" + "golang.org/x/tools/go/ssa" + "golang.org/x/tools/go/ssa/ssautil" + "golang.org/x/tools/go/types" + "golang.org/x/tools/oracle/serial" +) + +var builtinErrorType = types.Universe.Lookup("error").Type() + +// whicherrs takes an position to an error and tries to find all types, constants +// and global value which a given error can point to and which can be checked from the +// scope where the error lives. +// In short, it returns a list of things that can be checked against in order to handle +// an error properly. +// +// TODO(dmorsing): figure out if fields in errors like *os.PathError.Err +// can be queried recursively somehow. +func whicherrs(q *Query) error { + lconf := loader.Config{Build: q.Build} + + if err := setPTAScope(&lconf, q.Scope); err != nil { + return err + } + + // Load/parse/type-check the program. + lprog, err := lconf.Load() + if err != nil { + return err + } + q.Fset = lprog.Fset + + qpos, err := parseQueryPos(lprog, q.Pos, true) // needs exact pos + if err != nil { + return err + } + + prog := ssautil.CreateProgram(lprog, ssa.GlobalDebug) + + ptaConfig, err := setupPTA(prog, lprog, q.PTALog, q.Reflection) + if err != nil { + return err + } + + path, action := findInterestingNode(qpos.info, qpos.path) + if action != actionExpr { + return fmt.Errorf("whicherrs wants an expression; got %s", + astutil.NodeDescription(qpos.path[0])) + } + var expr ast.Expr + var obj types.Object + switch n := path[0].(type) { + case *ast.ValueSpec: + // ambiguous ValueSpec containing multiple names + return fmt.Errorf("multiple value specification") + case *ast.Ident: + obj = qpos.info.ObjectOf(n) + expr = n + case ast.Expr: + expr = n + default: + return fmt.Errorf("unexpected AST for expr: %T", n) + } + + typ := qpos.info.TypeOf(expr) + if !types.Identical(typ, builtinErrorType) { + return fmt.Errorf("selection is not an expression of type 'error'") + } + // Determine the ssa.Value for the expression. + var value ssa.Value + if obj != nil { + // def/ref of func/var object + value, _, err = ssaValueForIdent(prog, qpos.info, obj, path) + } else { + value, _, err = ssaValueForExpr(prog, qpos.info, path) + } + if err != nil { + return err // e.g. trivially dead code + } + + // Defer SSA construction till after errors are reported. + prog.BuildAll() + + globals := findVisibleErrs(prog, qpos) + constants := findVisibleConsts(prog, qpos) + + res := &whicherrsResult{ + qpos: qpos, + errpos: expr.Pos(), + } + + // TODO(adonovan): the following code is heavily duplicated + // w.r.t. "pointsto". Refactor? + + // Find the instruction which initialized the + // global error. If more than one instruction has stored to the global + // remove the global from the set of values that we want to query. + allFuncs := ssautil.AllFunctions(prog) + for fn := range allFuncs { + for _, b := range fn.Blocks { + for _, instr := range b.Instrs { + store, ok := instr.(*ssa.Store) + if !ok { + continue + } + gval, ok := store.Addr.(*ssa.Global) + if !ok { + continue + } + gbl, ok := globals[gval] + if !ok { + continue + } + // we already found a store to this global + // The normal error define is just one store in the init + // so we just remove this global from the set we want to query + if gbl != nil { + delete(globals, gval) + } + globals[gval] = store.Val + } + } + } + + ptaConfig.AddQuery(value) + for _, v := range globals { + ptaConfig.AddQuery(v) + } + + ptares := ptrAnalysis(ptaConfig) + valueptr := ptares.Queries[value] + for g, v := range globals { + ptr, ok := ptares.Queries[v] + if !ok { + continue + } + if !ptr.MayAlias(valueptr) { + continue + } + res.globals = append(res.globals, g) + } + pts := valueptr.PointsTo() + dedup := make(map[*ssa.NamedConst]bool) + for _, label := range pts.Labels() { + // These values are either MakeInterfaces or reflect + // generated interfaces. For the purposes of this + // analysis, we don't care about reflect generated ones + makeiface, ok := label.Value().(*ssa.MakeInterface) + if !ok { + continue + } + constval, ok := makeiface.X.(*ssa.Const) + if !ok { + continue + } + c := constants[*constval] + if c != nil && !dedup[c] { + dedup[c] = true + res.consts = append(res.consts, c) + } + } + concs := pts.DynamicTypes() + concs.Iterate(func(conc types.Type, _ interface{}) { + // go/types is a bit annoying here. + // We want to find all the types that we can + // typeswitch or assert to. This means finding out + // if the type pointed to can be seen by us. + // + // For the purposes of this analysis, the type is always + // either a Named type or a pointer to one. + // There are cases where error can be implemented + // by unnamed types, but in that case, we can't assert to + // it, so we don't care about it for this analysis. + var name *types.TypeName + switch t := conc.(type) { + case *types.Pointer: + named, ok := t.Elem().(*types.Named) + if !ok { + return + } + name = named.Obj() + case *types.Named: + name = t.Obj() + default: + return + } + if !isAccessibleFrom(name, qpos.info.Pkg) { + return + } + res.types = append(res.types, &errorType{conc, name}) + }) + sort.Sort(membersByPosAndString(res.globals)) + sort.Sort(membersByPosAndString(res.consts)) + sort.Sort(sorterrorType(res.types)) + + q.result = res + return nil +} + +// findVisibleErrs returns a mapping from each package-level variable of type "error" to nil. +func findVisibleErrs(prog *ssa.Program, qpos *queryPos) map[*ssa.Global]ssa.Value { + globals := make(map[*ssa.Global]ssa.Value) + for _, pkg := range prog.AllPackages() { + for _, mem := range pkg.Members { + gbl, ok := mem.(*ssa.Global) + if !ok { + continue + } + gbltype := gbl.Type() + // globals are always pointers + if !types.Identical(deref(gbltype), builtinErrorType) { + continue + } + if !isAccessibleFrom(gbl.Object(), qpos.info.Pkg) { + continue + } + globals[gbl] = nil + } + } + return globals +} + +// findVisibleConsts returns a mapping from each package-level constant assignable to type "error", to nil. +func findVisibleConsts(prog *ssa.Program, qpos *queryPos) map[ssa.Const]*ssa.NamedConst { + constants := make(map[ssa.Const]*ssa.NamedConst) + for _, pkg := range prog.AllPackages() { + for _, mem := range pkg.Members { + obj, ok := mem.(*ssa.NamedConst) + if !ok { + continue + } + consttype := obj.Type() + if !types.AssignableTo(consttype, builtinErrorType) { + continue + } + if !isAccessibleFrom(obj.Object(), qpos.info.Pkg) { + continue + } + constants[*obj.Value] = obj + } + } + + return constants +} + +type membersByPosAndString []ssa.Member + +func (a membersByPosAndString) Len() int { return len(a) } +func (a membersByPosAndString) Less(i, j int) bool { + cmp := a[i].Pos() - a[j].Pos() + return cmp < 0 || cmp == 0 && a[i].String() < a[j].String() +} +func (a membersByPosAndString) Swap(i, j int) { a[i], a[j] = a[j], a[i] } + +type sorterrorType []*errorType + +func (a sorterrorType) Len() int { return len(a) } +func (a sorterrorType) Less(i, j int) bool { + cmp := a[i].obj.Pos() - a[j].obj.Pos() + return cmp < 0 || cmp == 0 && a[i].typ.String() < a[j].typ.String() +} +func (a sorterrorType) Swap(i, j int) { a[i], a[j] = a[j], a[i] } + +type errorType struct { + typ types.Type // concrete type N or *N that implements error + obj *types.TypeName // the named type N +} + +type whicherrsResult struct { + qpos *queryPos + errpos token.Pos + globals []ssa.Member + consts []ssa.Member + types []*errorType +} + +func (r *whicherrsResult) display(printf printfFunc) { + if len(r.globals) > 0 { + printf(r.qpos, "this error may point to these globals:") + for _, g := range r.globals { + printf(g.Pos(), "\t%s", g.RelString(r.qpos.info.Pkg)) + } + } + if len(r.consts) > 0 { + printf(r.qpos, "this error may contain these constants:") + for _, c := range r.consts { + printf(c.Pos(), "\t%s", c.RelString(r.qpos.info.Pkg)) + } + } + if len(r.types) > 0 { + printf(r.qpos, "this error may contain these dynamic types:") + for _, t := range r.types { + printf(t.obj.Pos(), "\t%s", r.qpos.typeString(t.typ)) + } + } +} + +func (r *whicherrsResult) toSerial(res *serial.Result, fset *token.FileSet) { + we := &serial.WhichErrs{} + we.ErrPos = fset.Position(r.errpos).String() + for _, g := range r.globals { + we.Globals = append(we.Globals, fset.Position(g.Pos()).String()) + } + for _, c := range r.consts { + we.Constants = append(we.Constants, fset.Position(c.Pos()).String()) + } + for _, t := range r.types { + var et serial.WhichErrsType + et.Type = r.qpos.typeString(t.typ) + et.Position = fset.Position(t.obj.Pos()).String() + we.Types = append(we.Types, et) + } + res.WhichErrs = we +} diff --git a/vendor/golang.org/x/tools/present/args.go b/vendor/golang.org/x/tools/present/args.go new file mode 100644 index 0000000..49ee1a9 --- /dev/null +++ b/vendor/golang.org/x/tools/present/args.go @@ -0,0 +1,229 @@ +// Copyright 2012 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package present + +import ( + "errors" + "regexp" + "strconv" + "unicode/utf8" +) + +// This file is stolen from go/src/cmd/godoc/codewalk.go. +// It's an evaluator for the file address syntax implemented by acme and sam, +// but using Go-native regular expressions. +// To keep things reasonably close, this version uses (?m:re) for all user-provided +// regular expressions. That is the only change to the code from codewalk.go. +// See http://plan9.bell-labs.com/sys/doc/sam/sam.html Table II +// for details on the syntax. + +// addrToByte evaluates the given address starting at offset start in data. +// It returns the lo and hi byte offset of the matched region within data. +func addrToByteRange(addr string, start int, data []byte) (lo, hi int, err error) { + if addr == "" { + lo, hi = start, len(data) + return + } + var ( + dir byte + prevc byte + charOffset bool + ) + lo = start + hi = start + for addr != "" && err == nil { + c := addr[0] + switch c { + default: + err = errors.New("invalid address syntax near " + string(c)) + case ',': + if len(addr) == 1 { + hi = len(data) + } else { + _, hi, err = addrToByteRange(addr[1:], hi, data) + } + return + + case '+', '-': + if prevc == '+' || prevc == '-' { + lo, hi, err = addrNumber(data, lo, hi, prevc, 1, charOffset) + } + dir = c + + case '$': + lo = len(data) + hi = len(data) + if len(addr) > 1 { + dir = '+' + } + + case '#': + charOffset = true + + case '0', '1', '2', '3', '4', '5', '6', '7', '8', '9': + var i int + for i = 1; i < len(addr); i++ { + if addr[i] < '0' || addr[i] > '9' { + break + } + } + var n int + n, err = strconv.Atoi(addr[0:i]) + if err != nil { + break + } + lo, hi, err = addrNumber(data, lo, hi, dir, n, charOffset) + dir = 0 + charOffset = false + prevc = c + addr = addr[i:] + continue + + case '/': + var i, j int + Regexp: + for i = 1; i < len(addr); i++ { + switch addr[i] { + case '\\': + i++ + case '/': + j = i + 1 + break Regexp + } + } + if j == 0 { + j = i + } + pattern := addr[1:i] + lo, hi, err = addrRegexp(data, lo, hi, dir, pattern) + prevc = c + addr = addr[j:] + continue + } + prevc = c + addr = addr[1:] + } + + if err == nil && dir != 0 { + lo, hi, err = addrNumber(data, lo, hi, dir, 1, charOffset) + } + if err != nil { + return 0, 0, err + } + return lo, hi, nil +} + +// addrNumber applies the given dir, n, and charOffset to the address lo, hi. +// dir is '+' or '-', n is the count, and charOffset is true if the syntax +// used was #n. Applying +n (or +#n) means to advance n lines +// (or characters) after hi. Applying -n (or -#n) means to back up n lines +// (or characters) before lo. +// The return value is the new lo, hi. +func addrNumber(data []byte, lo, hi int, dir byte, n int, charOffset bool) (int, int, error) { + switch dir { + case 0: + lo = 0 + hi = 0 + fallthrough + + case '+': + if charOffset { + pos := hi + for ; n > 0 && pos < len(data); n-- { + _, size := utf8.DecodeRune(data[pos:]) + pos += size + } + if n == 0 { + return pos, pos, nil + } + break + } + // find next beginning of line + if hi > 0 { + for hi < len(data) && data[hi-1] != '\n' { + hi++ + } + } + lo = hi + if n == 0 { + return lo, hi, nil + } + for ; hi < len(data); hi++ { + if data[hi] != '\n' { + continue + } + switch n--; n { + case 1: + lo = hi + 1 + case 0: + return lo, hi + 1, nil + } + } + + case '-': + if charOffset { + // Scan backward for bytes that are not UTF-8 continuation bytes. + pos := lo + for ; pos > 0 && n > 0; pos-- { + if data[pos]&0xc0 != 0x80 { + n-- + } + } + if n == 0 { + return pos, pos, nil + } + break + } + // find earlier beginning of line + for lo > 0 && data[lo-1] != '\n' { + lo-- + } + hi = lo + if n == 0 { + return lo, hi, nil + } + for ; lo >= 0; lo-- { + if lo > 0 && data[lo-1] != '\n' { + continue + } + switch n--; n { + case 1: + hi = lo + case 0: + return lo, hi, nil + } + } + } + + return 0, 0, errors.New("address out of range") +} + +// addrRegexp searches for pattern in the given direction starting at lo, hi. +// The direction dir is '+' (search forward from hi) or '-' (search backward from lo). +// Backward searches are unimplemented. +func addrRegexp(data []byte, lo, hi int, dir byte, pattern string) (int, int, error) { + // We want ^ and $ to work as in sam/acme, so use ?m. + re, err := regexp.Compile("(?m:" + pattern + ")") + if err != nil { + return 0, 0, err + } + if dir == '-' { + // Could implement reverse search using binary search + // through file, but that seems like overkill. + return 0, 0, errors.New("reverse search not implemented") + } + m := re.FindIndex(data[hi:]) + if len(m) > 0 { + m[0] += hi + m[1] += hi + } else if hi > 0 { + // No match. Wrap to beginning of data. + m = re.FindIndex(data) + } + if len(m) == 0 { + return 0, 0, errors.New("no match for " + pattern) + } + return m[0], m[1], nil +} diff --git a/vendor/golang.org/x/tools/present/caption.go b/vendor/golang.org/x/tools/present/caption.go new file mode 100644 index 0000000..00e0b5d --- /dev/null +++ b/vendor/golang.org/x/tools/present/caption.go @@ -0,0 +1,22 @@ +// Copyright 2012 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package present + +import "strings" + +func init() { + Register("caption", parseCaption) +} + +type Caption struct { + Text string +} + +func (c Caption) TemplateName() string { return "caption" } + +func parseCaption(_ *Context, _ string, _ int, text string) (Elem, error) { + text = strings.TrimSpace(strings.TrimPrefix(text, ".caption")) + return Caption{text}, nil +} diff --git a/vendor/golang.org/x/tools/present/code.go b/vendor/golang.org/x/tools/present/code.go new file mode 100644 index 0000000..5a29951 --- /dev/null +++ b/vendor/golang.org/x/tools/present/code.go @@ -0,0 +1,293 @@ +// Copyright 2012 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package present + +import ( + "bufio" + "bytes" + "fmt" + "html/template" + "path/filepath" + "regexp" + "strconv" + "strings" +) + +// Is the playground available? +var PlayEnabled = false + +// TOOD(adg): replace the PlayEnabled flag with something less spaghetti-like. +// Instead this will probably be determined by a template execution Context +// value that contains various global metadata required when rendering +// templates. + +func init() { + Register("code", parseCode) + Register("play", parseCode) +} + +type Code struct { + Text template.HTML + Play bool // runnable code + FileName string // file name + Ext string // file extension + Raw []byte // content of the file +} + +func (c Code) TemplateName() string { return "code" } + +// The input line is a .code or .play entry with a file name and an optional HLfoo marker on the end. +// Anything between the file and HL (if any) is an address expression, which we treat as a string here. +// We pick off the HL first, for easy parsing. +var ( + highlightRE = regexp.MustCompile(`\s+HL([a-zA-Z0-9_]+)?$`) + hlCommentRE = regexp.MustCompile(`(.+) // HL(.*)$`) + codeRE = regexp.MustCompile(`\.(code|play)\s+((?:(?:-edit|-numbers)\s+)*)([^\s]+)(?:\s+(.*))?$`) +) + +// parseCode parses a code present directive. Its syntax: +// .code [-numbers] [-edit] [address] [highlight] +// The directive may also be ".play" if the snippet is executable. +func parseCode(ctx *Context, sourceFile string, sourceLine int, cmd string) (Elem, error) { + cmd = strings.TrimSpace(cmd) + + // Pull off the HL, if any, from the end of the input line. + highlight := "" + if hl := highlightRE.FindStringSubmatchIndex(cmd); len(hl) == 4 { + highlight = cmd[hl[2]:hl[3]] + cmd = cmd[:hl[2]-2] + } + + // Parse the remaining command line. + // Arguments: + // args[0]: whole match + // args[1]: .code/.play + // args[2]: flags ("-edit -numbers") + // args[3]: file name + // args[4]: optional address + args := codeRE.FindStringSubmatch(cmd) + if len(args) != 5 { + return nil, fmt.Errorf("%s:%d: syntax error for .code/.play invocation", sourceFile, sourceLine) + } + command, flags, file, addr := args[1], args[2], args[3], strings.TrimSpace(args[4]) + play := command == "play" && PlayEnabled + + // Read in code file and (optionally) match address. + filename := filepath.Join(filepath.Dir(sourceFile), file) + textBytes, err := ctx.ReadFile(filename) + if err != nil { + return nil, fmt.Errorf("%s:%d: %v", sourceFile, sourceLine, err) + } + lo, hi, err := addrToByteRange(addr, 0, textBytes) + if err != nil { + return nil, fmt.Errorf("%s:%d: %v", sourceFile, sourceLine, err) + } + + // Acme pattern matches can stop mid-line, + // so run to end of line in both directions if not at line start/end. + for lo > 0 && textBytes[lo-1] != '\n' { + lo-- + } + if hi > 0 { + for hi < len(textBytes) && textBytes[hi-1] != '\n' { + hi++ + } + } + + lines := codeLines(textBytes, lo, hi) + + data := &codeTemplateData{ + Lines: formatLines(lines, highlight), + Edit: strings.Contains(flags, "-edit"), + Numbers: strings.Contains(flags, "-numbers"), + } + + // Include before and after in a hidden span for playground code. + if play { + data.Prefix = textBytes[:lo] + data.Suffix = textBytes[hi:] + } + + var buf bytes.Buffer + if err := codeTemplate.Execute(&buf, data); err != nil { + return nil, err + } + return Code{ + Text: template.HTML(buf.String()), + Play: play, + FileName: filepath.Base(filename), + Ext: filepath.Ext(filename), + Raw: rawCode(lines), + }, nil +} + +// formatLines returns a new slice of codeLine with the given lines +// replacing tabs with spaces and adding highlighting where needed. +func formatLines(lines []codeLine, highlight string) []codeLine { + formatted := make([]codeLine, len(lines)) + for i, line := range lines { + // Replace tabs with spaces, which work better in HTML. + line.L = strings.Replace(line.L, "\t", " ", -1) + + // Highlight lines that end with "// HL[highlight]" + // and strip the magic comment. + if m := hlCommentRE.FindStringSubmatch(line.L); m != nil { + line.L = m[1] + line.HL = m[2] == highlight + } + + formatted[i] = line + } + return formatted +} + +// rawCode returns the code represented by the given codeLines without any kind +// of formatting. +func rawCode(lines []codeLine) []byte { + b := new(bytes.Buffer) + for _, line := range lines { + b.WriteString(line.L) + b.WriteByte('\n') + } + return b.Bytes() +} + +type codeTemplateData struct { + Lines []codeLine + Prefix, Suffix []byte + Edit, Numbers bool +} + +var leadingSpaceRE = regexp.MustCompile(`^[ \t]*`) + +var codeTemplate = template.Must(template.New("code").Funcs(template.FuncMap{ + "trimSpace": strings.TrimSpace, + "leadingSpace": leadingSpaceRE.FindString, +}).Parse(codeTemplateHTML)) + +const codeTemplateHTML = ` +{{with .Prefix}}
{{printf "%s" .}}
{{end}} + +{{/* + */}}{{range .Lines}}{{/* + */}}{{if .HL}}{{leadingSpace .L}}{{trimSpace .L}}{{/* + */}}{{else}}{{.L}}{{end}}{{/* +*/}} +{{end}} + +{{with .Suffix}}
{{printf "%s" .}}
{{end}} +` + +// codeLine represents a line of code extracted from a source file. +type codeLine struct { + L string // The line of code. + N int // The line number from the source file. + HL bool // Whether the line should be highlighted. +} + +// codeLines takes a source file and returns the lines that +// span the byte range specified by start and end. +// It discards lines that end in "OMIT". +func codeLines(src []byte, start, end int) (lines []codeLine) { + startLine := 1 + for i, b := range src { + if i == start { + break + } + if b == '\n' { + startLine++ + } + } + s := bufio.NewScanner(bytes.NewReader(src[start:end])) + for n := startLine; s.Scan(); n++ { + l := s.Text() + if strings.HasSuffix(l, "OMIT") { + continue + } + lines = append(lines, codeLine{L: l, N: n}) + } + // Trim leading and trailing blank lines. + for len(lines) > 0 && len(lines[0].L) == 0 { + lines = lines[1:] + } + for len(lines) > 0 && len(lines[len(lines)-1].L) == 0 { + lines = lines[:len(lines)-1] + } + return +} + +func parseArgs(name string, line int, args []string) (res []interface{}, err error) { + res = make([]interface{}, len(args)) + for i, v := range args { + if len(v) == 0 { + return nil, fmt.Errorf("%s:%d bad code argument %q", name, line, v) + } + switch v[0] { + case '0', '1', '2', '3', '4', '5', '6', '7', '8', '9': + n, err := strconv.Atoi(v) + if err != nil { + return nil, fmt.Errorf("%s:%d bad code argument %q", name, line, v) + } + res[i] = n + case '/': + if len(v) < 2 || v[len(v)-1] != '/' { + return nil, fmt.Errorf("%s:%d bad code argument %q", name, line, v) + } + res[i] = v + case '$': + res[i] = "$" + case '_': + if len(v) == 1 { + // Do nothing; "_" indicates an intentionally empty parameter. + break + } + fallthrough + default: + return nil, fmt.Errorf("%s:%d bad code argument %q", name, line, v) + } + } + return +} + +// parseArg returns the integer or string value of the argument and tells which it is. +func parseArg(arg interface{}, max int) (ival int, sval string, isInt bool, err error) { + switch n := arg.(type) { + case int: + if n <= 0 || n > max { + return 0, "", false, fmt.Errorf("%d is out of range", n) + } + return n, "", true, nil + case string: + return 0, n, false, nil + } + return 0, "", false, fmt.Errorf("unrecognized argument %v type %T", arg, arg) +} + +// match identifies the input line that matches the pattern in a code invocation. +// If start>0, match lines starting there rather than at the beginning. +// The return value is 1-indexed. +func match(file string, start int, lines []string, pattern string) (int, error) { + // $ matches the end of the file. + if pattern == "$" { + if len(lines) == 0 { + return 0, fmt.Errorf("%q: empty file", file) + } + return len(lines), nil + } + // /regexp/ matches the line that matches the regexp. + if len(pattern) > 2 && pattern[0] == '/' && pattern[len(pattern)-1] == '/' { + re, err := regexp.Compile(pattern[1 : len(pattern)-1]) + if err != nil { + return 0, err + } + for i := start; i < len(lines); i++ { + if re.MatchString(lines[i]) { + return i + 1, nil + } + } + return 0, fmt.Errorf("%s: no match for %#q", file, pattern) + } + return 0, fmt.Errorf("unrecognized pattern: %q", pattern) +} diff --git a/vendor/golang.org/x/tools/present/doc.go b/vendor/golang.org/x/tools/present/doc.go new file mode 100644 index 0000000..584e0c1 --- /dev/null +++ b/vendor/golang.org/x/tools/present/doc.go @@ -0,0 +1,205 @@ +// Copyright 2011 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +/* +The present file format + +Present files have the following format. The first non-blank non-comment +line is the title, so the header looks like + + Title of document + Subtitle of document + 15:04 2 Jan 2006 + Tags: foo, bar, baz + + Author Name + Job title, Company + joe@example.com + http://url/ + @twitter_name + +The subtitle, date, and tags lines are optional. + +The date line may be written without a time: + 2 Jan 2006 +In this case, the time will be interpreted as 10am UTC on that date. + +The tags line is a comma-separated list of tags that may be used to categorize +the document. + +The author section may contain a mixture of text, twitter names, and links. +For slide presentations, only the plain text lines will be displayed on the +first slide. + +Multiple presenters may be specified, separated by a blank line. + +After that come slides/sections, each after a blank line: + + * Title of slide or section (must have asterisk) + + Some Text + + ** Subsection + + - bullets + - more bullets + - a bullet with + + *** Sub-subsection + + Some More text + + Preformatted text + is indented (however you like) + + Further Text, including invocations like: + + .code x.go /^func main/,/^}/ + .play y.go + .image image.jpg + .iframe http://foo + .link http://foo label + .html file.html + .caption _Gopher_ by [[http://www.reneefrench.com][Renée French]] + + Again, more text + +Blank lines are OK (not mandatory) after the title and after the +text. Text, bullets, and .code etc. are all optional; title is +not. + +Lines starting with # in column 1 are commentary. + +Fonts: + +Within the input for plain text or lists, text bracketed by font +markers will be presented in italic, bold, or program font. +Marker characters are _ (italic), * (bold) and ` (program font). +Unmatched markers appear as plain text. +Within marked text, a single marker character becomes a space +and a doubled single marker quotes the marker character. + + _italic_ + *bold* + `program` + _this_is_all_italic_ + _Why_use_scoped__ptr_? Use plain ***ptr* instead. + +Inline links: + +Links can be included in any text with the form [[url][label]], or +[[url]] to use the URL itself as the label. + +Functions: + +A number of template functions are available through invocations +in the input text. Each such invocation contains a period as the +first character on the line, followed immediately by the name of +the function, followed by any arguments. A typical invocation might +be + .play demo.go /^func show/,/^}/ +(except that the ".play" must be at the beginning of the line and +not be indented like this.) + +Here follows a description of the functions: + +code: + +Injects program source into the output by extracting code from files +and injecting them as HTML-escaped 
 blocks.  The argument is
+a file name followed by an optional address that specifies what
+section of the file to display. The address syntax is similar in
+its simplest form to that of ed, but comes from sam and is more
+general. See
+	http://plan9.bell-labs.com/sys/doc/sam/sam.html Table II
+for full details. The displayed block is always rounded out to a
+full line at both ends.
+
+If no pattern is present, the entire file is displayed.
+
+Any line in the program that ends with the four characters
+	OMIT
+is deleted from the source before inclusion, making it easy
+to write things like
+	.code test.go /START OMIT/,/END OMIT/
+to find snippets like this
+	tedious_code = boring_function()
+	// START OMIT
+	interesting_code = fascinating_function()
+	// END OMIT
+and see only this:
+	interesting_code = fascinating_function()
+
+Also, inside the displayed text a line that ends
+	// HL
+will be highlighted in the display; the 'h' key in the browser will
+toggle extra emphasis of any highlighted lines. A highlighting mark
+may have a suffix word, such as
+	// HLxxx
+Such highlights are enabled only if the code invocation ends with
+"HL" followed by the word:
+	.code test.go /^type Foo/,/^}/ HLxxx
+
+The .code function may take one or more flags immediately preceding
+the filename. This command shows test.go in an editable text area:
+	.code -edit test.go
+This command shows test.go with line numbers:
+	.code -numbers test.go
+
+play:
+
+The function "play" is the same as "code" but puts a button
+on the displayed source so the program can be run from the browser.
+Although only the selected text is shown, all the source is included
+in the HTML output so it can be presented to the compiler.
+
+link:
+
+Create a hyperlink. The syntax is 1 or 2 space-separated arguments.
+The first argument is always the HTTP URL.  If there is a second
+argument, it is the text label to display for this link.
+
+	.link http://golang.org golang.org
+
+image:
+
+The template uses the function "image" to inject picture files.
+
+The syntax is simple: 1 or 3 space-separated arguments.
+The first argument is always the file name.
+If there are more arguments, they are the height and width;
+both must be present, or substituted with an underscore.
+Replacing a dimension argument with the underscore parameter
+preserves the aspect ratio of the image when scaling.
+
+	.image images/betsy.jpg 100 200
+
+	.image images/janet.jpg _ 300
+
+
+caption:
+
+The template uses the function "caption" to inject figure captions.
+
+The text after ".caption" is embedded in a figcaption element after
+processing styling and links as in standard text lines.
+
+	.caption _Gopher_ by [[http://www.reneefrench.com][Renée French]]
+
+iframe:
+
+The function "iframe" injects iframes (pages inside pages).
+Its syntax is the same as that of image.
+
+html:
+
+The function html includes the contents of the specified file as
+unescaped HTML. This is useful for including custom HTML elements
+that cannot be created using only the slide format.
+It is your responsibilty to make sure the included HTML is valid and safe.
+
+	.html file.html
+
+*/
+package present // import "golang.org/x/tools/present"
diff --git a/vendor/golang.org/x/tools/present/html.go b/vendor/golang.org/x/tools/present/html.go
new file mode 100644
index 0000000..cca90ef
--- /dev/null
+++ b/vendor/golang.org/x/tools/present/html.go
@@ -0,0 +1,31 @@
+package present
+
+import (
+	"errors"
+	"html/template"
+	"path/filepath"
+	"strings"
+)
+
+func init() {
+	Register("html", parseHTML)
+}
+
+func parseHTML(ctx *Context, fileName string, lineno int, text string) (Elem, error) {
+	p := strings.Fields(text)
+	if len(p) != 2 {
+		return nil, errors.New("invalid .html args")
+	}
+	name := filepath.Join(filepath.Dir(fileName), p[1])
+	b, err := ctx.ReadFile(name)
+	if err != nil {
+		return nil, err
+	}
+	return HTML{template.HTML(b)}, nil
+}
+
+type HTML struct {
+	template.HTML
+}
+
+func (s HTML) TemplateName() string { return "html" }
diff --git a/vendor/golang.org/x/tools/present/iframe.go b/vendor/golang.org/x/tools/present/iframe.go
new file mode 100644
index 0000000..2f3c5e5
--- /dev/null
+++ b/vendor/golang.org/x/tools/present/iframe.go
@@ -0,0 +1,45 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package present
+
+import (
+	"fmt"
+	"strings"
+)
+
+func init() {
+	Register("iframe", parseIframe)
+}
+
+type Iframe struct {
+	URL    string
+	Width  int
+	Height int
+}
+
+func (i Iframe) TemplateName() string { return "iframe" }
+
+func parseIframe(ctx *Context, fileName string, lineno int, text string) (Elem, error) {
+	args := strings.Fields(text)
+	i := Iframe{URL: args[1]}
+	a, err := parseArgs(fileName, lineno, args[2:])
+	if err != nil {
+		return nil, err
+	}
+	switch len(a) {
+	case 0:
+		// no size parameters
+	case 2:
+		if v, ok := a[0].(int); ok {
+			i.Height = v
+		}
+		if v, ok := a[1].(int); ok {
+			i.Width = v
+		}
+	default:
+		return nil, fmt.Errorf("incorrect image invocation: %q", text)
+	}
+	return i, nil
+}
diff --git a/vendor/golang.org/x/tools/present/image.go b/vendor/golang.org/x/tools/present/image.go
new file mode 100644
index 0000000..cfa2af9
--- /dev/null
+++ b/vendor/golang.org/x/tools/present/image.go
@@ -0,0 +1,50 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package present
+
+import (
+	"fmt"
+	"strings"
+)
+
+func init() {
+	Register("image", parseImage)
+}
+
+type Image struct {
+	URL    string
+	Width  int
+	Height int
+}
+
+func (i Image) TemplateName() string { return "image" }
+
+func parseImage(ctx *Context, fileName string, lineno int, text string) (Elem, error) {
+	args := strings.Fields(text)
+	img := Image{URL: args[1]}
+	a, err := parseArgs(fileName, lineno, args[2:])
+	if err != nil {
+		return nil, err
+	}
+	switch len(a) {
+	case 0:
+		// no size parameters
+	case 2:
+		// If a parameter is empty (underscore) or invalid
+		// leave the field set to zero. The "image" action
+		// template will then omit that img tag attribute and
+		// the browser will calculate the value to preserve
+		// the aspect ratio.
+		if v, ok := a[0].(int); ok {
+			img.Height = v
+		}
+		if v, ok := a[1].(int); ok {
+			img.Width = v
+		}
+	default:
+		return nil, fmt.Errorf("incorrect image invocation: %q", text)
+	}
+	return img, nil
+}
diff --git a/vendor/golang.org/x/tools/present/link.go b/vendor/golang.org/x/tools/present/link.go
new file mode 100644
index 0000000..6b0968f
--- /dev/null
+++ b/vendor/golang.org/x/tools/present/link.go
@@ -0,0 +1,97 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package present
+
+import (
+	"fmt"
+	"log"
+	"net/url"
+	"strings"
+)
+
+func init() {
+	Register("link", parseLink)
+}
+
+type Link struct {
+	URL   *url.URL
+	Label string
+}
+
+func (l Link) TemplateName() string { return "link" }
+
+func parseLink(ctx *Context, fileName string, lineno int, text string) (Elem, error) {
+	args := strings.Fields(text)
+	url, err := url.Parse(args[1])
+	if err != nil {
+		return nil, err
+	}
+	label := ""
+	if len(args) > 2 {
+		label = strings.Join(args[2:], " ")
+	} else {
+		scheme := url.Scheme + "://"
+		if url.Scheme == "mailto" {
+			scheme = "mailto:"
+		}
+		label = strings.Replace(url.String(), scheme, "", 1)
+	}
+	return Link{url, label}, nil
+}
+
+func renderLink(href, text string) string {
+	text = font(text)
+	if text == "" {
+		text = href
+	}
+	// Open links in new window only when their url is absolute.
+	target := "_blank"
+	if u, err := url.Parse(href); err != nil {
+		log.Println("rendernLink parsing url:", err)
+	} else if !u.IsAbs() || u.Scheme == "javascript" {
+		target = "_self"
+	}
+
+	return fmt.Sprintf(`%s`, href, target, text)
+}
+
+// parseInlineLink parses an inline link at the start of s, and returns
+// a rendered HTML link and the total length of the raw inline link.
+// If no inline link is present, it returns all zeroes.
+func parseInlineLink(s string) (link string, length int) {
+	if !strings.HasPrefix(s, "[[") {
+		return
+	}
+	end := strings.Index(s, "]]")
+	if end == -1 {
+		return
+	}
+	urlEnd := strings.Index(s, "]")
+	rawURL := s[2:urlEnd]
+	const badURLChars = `<>"{}|\^[] ` + "`" // per RFC2396 section 2.4.3
+	if strings.ContainsAny(rawURL, badURLChars) {
+		return
+	}
+	if urlEnd == end {
+		simpleUrl := ""
+		url, err := url.Parse(rawURL)
+		if err == nil {
+			// If the URL is http://foo.com, drop the http://
+			// In other words, render [[http://golang.org]] as:
+			//   golang.org
+			if strings.HasPrefix(rawURL, url.Scheme+"://") {
+				simpleUrl = strings.TrimPrefix(rawURL, url.Scheme+"://")
+			} else if strings.HasPrefix(rawURL, url.Scheme+":") {
+				simpleUrl = strings.TrimPrefix(rawURL, url.Scheme+":")
+			}
+		}
+		return renderLink(rawURL, simpleUrl), end + 2
+	}
+	if s[urlEnd:urlEnd+2] != "][" {
+		return
+	}
+	text := s[urlEnd+2 : end]
+	return renderLink(rawURL, text), end + 2
+}
diff --git a/vendor/golang.org/x/tools/present/parse.go b/vendor/golang.org/x/tools/present/parse.go
new file mode 100644
index 0000000..449d5ed
--- /dev/null
+++ b/vendor/golang.org/x/tools/present/parse.go
@@ -0,0 +1,505 @@
+// Copyright 2011 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package present
+
+import (
+	"bufio"
+	"bytes"
+	"errors"
+	"fmt"
+	"html/template"
+	"io"
+	"io/ioutil"
+	"log"
+	"net/url"
+	"regexp"
+	"strings"
+	"time"
+	"unicode"
+	"unicode/utf8"
+)
+
+var (
+	parsers = make(map[string]ParseFunc)
+	funcs   = template.FuncMap{}
+)
+
+// Template returns an empty template with the action functions in its FuncMap.
+func Template() *template.Template {
+	return template.New("").Funcs(funcs)
+}
+
+// Render renders the doc to the given writer using the provided template.
+func (d *Doc) Render(w io.Writer, t *template.Template) error {
+	data := struct {
+		*Doc
+		Template    *template.Template
+		PlayEnabled bool
+	}{d, t, PlayEnabled}
+	return t.ExecuteTemplate(w, "root", data)
+}
+
+// Render renders the section to the given writer using the provided template.
+func (s *Section) Render(w io.Writer, t *template.Template) error {
+	data := struct {
+		*Section
+		Template    *template.Template
+		PlayEnabled bool
+	}{s, t, PlayEnabled}
+	return t.ExecuteTemplate(w, "section", data)
+}
+
+type ParseFunc func(ctx *Context, fileName string, lineNumber int, inputLine string) (Elem, error)
+
+// Register binds the named action, which does not begin with a period, to the
+// specified parser to be invoked when the name, with a period, appears in the
+// present input text.
+func Register(name string, parser ParseFunc) {
+	if len(name) == 0 || name[0] == ';' {
+		panic("bad name in Register: " + name)
+	}
+	parsers["."+name] = parser
+}
+
+// Doc represents an entire document.
+type Doc struct {
+	Title    string
+	Subtitle string
+	Time     time.Time
+	Authors  []Author
+	Sections []Section
+	Tags     []string
+}
+
+// Author represents the person who wrote and/or is presenting the document.
+type Author struct {
+	Elem []Elem
+}
+
+// TextElem returns the first text elements of the author details.
+// This is used to display the author' name, job title, and company
+// without the contact details.
+func (p *Author) TextElem() (elems []Elem) {
+	for _, el := range p.Elem {
+		if _, ok := el.(Text); !ok {
+			break
+		}
+		elems = append(elems, el)
+	}
+	return
+}
+
+// Section represents a section of a document (such as a presentation slide)
+// comprising a title and a list of elements.
+type Section struct {
+	Number []int
+	Title  string
+	Elem   []Elem
+}
+
+func (s Section) Sections() (sections []Section) {
+	for _, e := range s.Elem {
+		if section, ok := e.(Section); ok {
+			sections = append(sections, section)
+		}
+	}
+	return
+}
+
+// Level returns the level of the given section.
+// The document title is level 1, main section 2, etc.
+func (s Section) Level() int {
+	return len(s.Number) + 1
+}
+
+// FormattedNumber returns a string containing the concatenation of the
+// numbers identifying a Section.
+func (s Section) FormattedNumber() string {
+	b := &bytes.Buffer{}
+	for _, n := range s.Number {
+		fmt.Fprintf(b, "%v.", n)
+	}
+	return b.String()
+}
+
+func (s Section) TemplateName() string { return "section" }
+
+// Elem defines the interface for a present element. That is, something that
+// can provide the name of the template used to render the element.
+type Elem interface {
+	TemplateName() string
+}
+
+// renderElem implements the elem template function, used to render
+// sub-templates.
+func renderElem(t *template.Template, e Elem) (template.HTML, error) {
+	var data interface{} = e
+	if s, ok := e.(Section); ok {
+		data = struct {
+			Section
+			Template *template.Template
+		}{s, t}
+	}
+	return execTemplate(t, e.TemplateName(), data)
+}
+
+func init() {
+	funcs["elem"] = renderElem
+}
+
+// execTemplate is a helper to execute a template and return the output as a
+// template.HTML value.
+func execTemplate(t *template.Template, name string, data interface{}) (template.HTML, error) {
+	b := new(bytes.Buffer)
+	err := t.ExecuteTemplate(b, name, data)
+	if err != nil {
+		return "", err
+	}
+	return template.HTML(b.String()), nil
+}
+
+// Text represents an optionally preformatted paragraph.
+type Text struct {
+	Lines []string
+	Pre   bool
+}
+
+func (t Text) TemplateName() string { return "text" }
+
+// List represents a bulleted list.
+type List struct {
+	Bullet []string
+}
+
+func (l List) TemplateName() string { return "list" }
+
+// Lines is a helper for parsing line-based input.
+type Lines struct {
+	line int // 0 indexed, so has 1-indexed number of last line returned
+	text []string
+}
+
+func readLines(r io.Reader) (*Lines, error) {
+	var lines []string
+	s := bufio.NewScanner(r)
+	for s.Scan() {
+		lines = append(lines, s.Text())
+	}
+	if err := s.Err(); err != nil {
+		return nil, err
+	}
+	return &Lines{0, lines}, nil
+}
+
+func (l *Lines) next() (text string, ok bool) {
+	for {
+		current := l.line
+		l.line++
+		if current >= len(l.text) {
+			return "", false
+		}
+		text = l.text[current]
+		// Lines starting with # are comments.
+		if len(text) == 0 || text[0] != '#' {
+			ok = true
+			break
+		}
+	}
+	return
+}
+
+func (l *Lines) back() {
+	l.line--
+}
+
+func (l *Lines) nextNonEmpty() (text string, ok bool) {
+	for {
+		text, ok = l.next()
+		if !ok {
+			return
+		}
+		if len(text) > 0 {
+			break
+		}
+	}
+	return
+}
+
+// A Context specifies the supporting context for parsing a presentation.
+type Context struct {
+	// ReadFile reads the file named by filename and returns the contents.
+	ReadFile func(filename string) ([]byte, error)
+}
+
+// ParseMode represents flags for the Parse function.
+type ParseMode int
+
+const (
+	// If set, parse only the title and subtitle.
+	TitlesOnly ParseMode = 1
+)
+
+// Parse parses a document from r.
+func (ctx *Context) Parse(r io.Reader, name string, mode ParseMode) (*Doc, error) {
+	doc := new(Doc)
+	lines, err := readLines(r)
+	if err != nil {
+		return nil, err
+	}
+	err = parseHeader(doc, lines)
+	if err != nil {
+		return nil, err
+	}
+	if mode&TitlesOnly != 0 {
+		return doc, nil
+	}
+	// Authors
+	if doc.Authors, err = parseAuthors(lines); err != nil {
+		return nil, err
+	}
+	// Sections
+	if doc.Sections, err = parseSections(ctx, name, lines, []int{}, doc); err != nil {
+		return nil, err
+	}
+	return doc, nil
+}
+
+// Parse parses a document from r. Parse reads assets used by the presentation
+// from the file system using ioutil.ReadFile.
+func Parse(r io.Reader, name string, mode ParseMode) (*Doc, error) {
+	ctx := Context{ReadFile: ioutil.ReadFile}
+	return ctx.Parse(r, name, mode)
+}
+
+// isHeading matches any section heading.
+var isHeading = regexp.MustCompile(`^\*+ `)
+
+// lesserHeading returns true if text is a heading of a lesser or equal level
+// than that denoted by prefix.
+func lesserHeading(text, prefix string) bool {
+	return isHeading.MatchString(text) && !strings.HasPrefix(text, prefix+"*")
+}
+
+// parseSections parses Sections from lines for the section level indicated by
+// number (a nil number indicates the top level).
+func parseSections(ctx *Context, name string, lines *Lines, number []int, doc *Doc) ([]Section, error) {
+	var sections []Section
+	for i := 1; ; i++ {
+		// Next non-empty line is title.
+		text, ok := lines.nextNonEmpty()
+		for ok && text == "" {
+			text, ok = lines.next()
+		}
+		if !ok {
+			break
+		}
+		prefix := strings.Repeat("*", len(number)+1)
+		if !strings.HasPrefix(text, prefix+" ") {
+			lines.back()
+			break
+		}
+		section := Section{
+			Number: append(append([]int{}, number...), i),
+			Title:  text[len(prefix)+1:],
+		}
+		text, ok = lines.nextNonEmpty()
+		for ok && !lesserHeading(text, prefix) {
+			var e Elem
+			r, _ := utf8.DecodeRuneInString(text)
+			switch {
+			case unicode.IsSpace(r):
+				i := strings.IndexFunc(text, func(r rune) bool {
+					return !unicode.IsSpace(r)
+				})
+				if i < 0 {
+					break
+				}
+				indent := text[:i]
+				var s []string
+				for ok && (strings.HasPrefix(text, indent) || text == "") {
+					if text != "" {
+						text = text[i:]
+					}
+					s = append(s, text)
+					text, ok = lines.next()
+				}
+				lines.back()
+				pre := strings.Join(s, "\n")
+				pre = strings.Replace(pre, "\t", "    ", -1) // browsers treat tabs badly
+				pre = strings.TrimRightFunc(pre, unicode.IsSpace)
+				e = Text{Lines: []string{pre}, Pre: true}
+			case strings.HasPrefix(text, "- "):
+				var b []string
+				for ok && strings.HasPrefix(text, "- ") {
+					b = append(b, text[2:])
+					text, ok = lines.next()
+				}
+				lines.back()
+				e = List{Bullet: b}
+			case strings.HasPrefix(text, prefix+"* "):
+				lines.back()
+				subsecs, err := parseSections(ctx, name, lines, section.Number, doc)
+				if err != nil {
+					return nil, err
+				}
+				for _, ss := range subsecs {
+					section.Elem = append(section.Elem, ss)
+				}
+			case strings.HasPrefix(text, "."):
+				args := strings.Fields(text)
+				parser := parsers[args[0]]
+				if parser == nil {
+					return nil, fmt.Errorf("%s:%d: unknown command %q\n", name, lines.line, text)
+				}
+				t, err := parser(ctx, name, lines.line, text)
+				if err != nil {
+					return nil, err
+				}
+				e = t
+			default:
+				var l []string
+				for ok && strings.TrimSpace(text) != "" {
+					if text[0] == '.' { // Command breaks text block.
+						break
+					}
+					if strings.HasPrefix(text, `\.`) { // Backslash escapes initial period.
+						text = text[1:]
+					}
+					l = append(l, text)
+					text, ok = lines.next()
+				}
+				if len(l) > 0 {
+					e = Text{Lines: l}
+				}
+			}
+			if e != nil {
+				section.Elem = append(section.Elem, e)
+			}
+			text, ok = lines.nextNonEmpty()
+		}
+		if isHeading.MatchString(text) {
+			lines.back()
+		}
+		sections = append(sections, section)
+	}
+	return sections, nil
+}
+
+func parseHeader(doc *Doc, lines *Lines) error {
+	var ok bool
+	// First non-empty line starts header.
+	doc.Title, ok = lines.nextNonEmpty()
+	if !ok {
+		return errors.New("unexpected EOF; expected title")
+	}
+	for {
+		text, ok := lines.next()
+		if !ok {
+			return errors.New("unexpected EOF")
+		}
+		if text == "" {
+			break
+		}
+		const tagPrefix = "Tags:"
+		if strings.HasPrefix(text, tagPrefix) {
+			tags := strings.Split(text[len(tagPrefix):], ",")
+			for i := range tags {
+				tags[i] = strings.TrimSpace(tags[i])
+			}
+			doc.Tags = append(doc.Tags, tags...)
+		} else if t, ok := parseTime(text); ok {
+			doc.Time = t
+		} else if doc.Subtitle == "" {
+			doc.Subtitle = text
+		} else {
+			return fmt.Errorf("unexpected header line: %q", text)
+		}
+	}
+	return nil
+}
+
+func parseAuthors(lines *Lines) (authors []Author, err error) {
+	// This grammar demarcates authors with blanks.
+
+	// Skip blank lines.
+	if _, ok := lines.nextNonEmpty(); !ok {
+		return nil, errors.New("unexpected EOF")
+	}
+	lines.back()
+
+	var a *Author
+	for {
+		text, ok := lines.next()
+		if !ok {
+			return nil, errors.New("unexpected EOF")
+		}
+
+		// If we find a section heading, we're done.
+		if strings.HasPrefix(text, "* ") {
+			lines.back()
+			break
+		}
+
+		// If we encounter a blank we're done with this author.
+		if a != nil && len(text) == 0 {
+			authors = append(authors, *a)
+			a = nil
+			continue
+		}
+		if a == nil {
+			a = new(Author)
+		}
+
+		// Parse the line. Those that
+		// - begin with @ are twitter names,
+		// - contain slashes are links, or
+		// - contain an @ symbol are an email address.
+		// The rest is just text.
+		var el Elem
+		switch {
+		case strings.HasPrefix(text, "@"):
+			el = parseURL("http://twitter.com/" + text[1:])
+		case strings.Contains(text, ":"):
+			el = parseURL(text)
+		case strings.Contains(text, "@"):
+			el = parseURL("mailto:" + text)
+		}
+		if l, ok := el.(Link); ok {
+			l.Label = text
+			el = l
+		}
+		if el == nil {
+			el = Text{Lines: []string{text}}
+		}
+		a.Elem = append(a.Elem, el)
+	}
+	if a != nil {
+		authors = append(authors, *a)
+	}
+	return authors, nil
+}
+
+func parseURL(text string) Elem {
+	u, err := url.Parse(text)
+	if err != nil {
+		log.Printf("Parse(%q): %v", text, err)
+		return nil
+	}
+	return Link{URL: u}
+}
+
+func parseTime(text string) (t time.Time, ok bool) {
+	t, err := time.Parse("15:04 2 Jan 2006", text)
+	if err == nil {
+		return t, true
+	}
+	t, err = time.Parse("2 Jan 2006", text)
+	if err == nil {
+		// at 11am UTC it is the same date everywhere
+		t = t.Add(time.Hour * 11)
+		return t, true
+	}
+	return time.Time{}, false
+}
diff --git a/vendor/golang.org/x/tools/present/style.go b/vendor/golang.org/x/tools/present/style.go
new file mode 100644
index 0000000..1cd240d
--- /dev/null
+++ b/vendor/golang.org/x/tools/present/style.go
@@ -0,0 +1,166 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package present
+
+import (
+	"bytes"
+	"html"
+	"html/template"
+	"strings"
+	"unicode"
+	"unicode/utf8"
+)
+
+/*
+	Fonts are demarcated by an initial and final char bracketing a
+	space-delimited word, plus possibly some terminal punctuation.
+	The chars are
+		_ for italic
+		* for bold
+		` (back quote) for fixed width.
+	Inner appearances of the char become spaces. For instance,
+		_this_is_italic_!
+	becomes
+		this is italic!
+*/
+
+func init() {
+	funcs["style"] = Style
+}
+
+// Style returns s with HTML entities escaped and font indicators turned into
+// HTML font tags.
+func Style(s string) template.HTML {
+	return template.HTML(font(html.EscapeString(s)))
+}
+
+// font returns s with font indicators turned into HTML font tags.
+func font(s string) string {
+	if strings.IndexAny(s, "[`_*") == -1 {
+		return s
+	}
+	words := split(s)
+	var b bytes.Buffer
+Word:
+	for w, word := range words {
+		if len(word) < 2 {
+			continue Word
+		}
+		if link, _ := parseInlineLink(word); link != "" {
+			words[w] = link
+			continue Word
+		}
+		const punctuation = `.,;:()!?—–'"`
+		const marker = "_*`"
+		// Initial punctuation is OK but must be peeled off.
+		first := strings.IndexAny(word, marker)
+		if first == -1 {
+			continue Word
+		}
+		// Is the marker prefixed only by punctuation?
+		for _, r := range word[:first] {
+			if !strings.ContainsRune(punctuation, r) {
+				continue Word
+			}
+		}
+		open, word := word[:first], word[first:]
+		char := word[0] // ASCII is OK.
+		close := ""
+		switch char {
+		default:
+			continue Word
+		case '_':
+			open += ""
+			close = ""
+		case '*':
+			open += ""
+			close = ""
+		case '`':
+			open += ""
+			close = ""
+		}
+		// Terminal punctuation is OK but must be peeled off.
+		last := strings.LastIndex(word, word[:1])
+		if last == 0 {
+			continue Word
+		}
+		head, tail := word[:last+1], word[last+1:]
+		for _, r := range tail {
+			if !strings.ContainsRune(punctuation, r) {
+				continue Word
+			}
+		}
+		b.Reset()
+		b.WriteString(open)
+		var wid int
+		for i := 1; i < len(head)-1; i += wid {
+			var r rune
+			r, wid = utf8.DecodeRuneInString(head[i:])
+			if r != rune(char) {
+				// Ordinary character.
+				b.WriteRune(r)
+				continue
+			}
+			if head[i+1] != char {
+				// Inner char becomes space.
+				b.WriteRune(' ')
+				continue
+			}
+			// Doubled char becomes real char.
+			// Not worth worrying about "_x__".
+			b.WriteByte(char)
+			wid++ // Consumed two chars, both ASCII.
+		}
+		b.WriteString(close) // Write closing tag.
+		b.WriteString(tail)  // Restore trailing punctuation.
+		words[w] = b.String()
+	}
+	return strings.Join(words, "")
+}
+
+// split is like strings.Fields but also returns the runs of spaces
+// and treats inline links as distinct words.
+func split(s string) []string {
+	var (
+		words = make([]string, 0, 10)
+		start = 0
+	)
+
+	// appendWord appends the string s[start:end] to the words slice.
+	// If the word contains the beginning of a link, the non-link portion
+	// of the word and the entire link are appended as separate words,
+	// and the start index is advanced to the end of the link.
+	appendWord := func(end int) {
+		if j := strings.Index(s[start:end], "[["); j > -1 {
+			if _, l := parseInlineLink(s[start+j:]); l > 0 {
+				// Append portion before link, if any.
+				if j > 0 {
+					words = append(words, s[start:start+j])
+				}
+				// Append link itself.
+				words = append(words, s[start+j:start+j+l])
+				// Advance start index to end of link.
+				start = start + j + l
+				return
+			}
+		}
+		// No link; just add the word.
+		words = append(words, s[start:end])
+		start = end
+	}
+
+	wasSpace := false
+	for i, r := range s {
+		isSpace := unicode.IsSpace(r)
+		if i > start && isSpace != wasSpace {
+			appendWord(i)
+		}
+		wasSpace = isSpace
+	}
+	for start < len(s) {
+		appendWord(len(s))
+	}
+	return words
+}
diff --git a/vendor/golang.org/x/tools/refactor/importgraph/graph.go b/vendor/golang.org/x/tools/refactor/importgraph/graph.go
new file mode 100644
index 0000000..8ad8014
--- /dev/null
+++ b/vendor/golang.org/x/tools/refactor/importgraph/graph.go
@@ -0,0 +1,128 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package importgraph computes the forward and reverse import
+// dependency graphs for all packages in a Go workspace.
+package importgraph // import "golang.org/x/tools/refactor/importgraph"
+
+import (
+	"go/build"
+	"sync"
+
+	"golang.org/x/tools/go/buildutil"
+)
+
+// A Graph is an import dependency graph, either forward or reverse.
+//
+// The graph maps each node (a package import path) to the set of its
+// successors in the graph.  For a forward graph, this is the set of
+// imported packages (prerequisites); for a reverse graph, it is the set
+// of importing packages (clients).
+//
+type Graph map[string]map[string]bool
+
+func (g Graph) addEdge(from, to string) {
+	edges := g[from]
+	if edges == nil {
+		edges = make(map[string]bool)
+		g[from] = edges
+	}
+	edges[to] = true
+}
+
+// Search returns all the nodes of the graph reachable from
+// any of the specified roots, by following edges forwards.
+// Relationally, this is the reflexive transitive closure.
+func (g Graph) Search(roots ...string) map[string]bool {
+	seen := make(map[string]bool)
+	var visit func(x string)
+	visit = func(x string) {
+		if !seen[x] {
+			seen[x] = true
+			for y := range g[x] {
+				visit(y)
+			}
+		}
+	}
+	for _, root := range roots {
+		visit(root)
+	}
+	return seen
+}
+
+// Build scans the specified Go workspace and builds the forward and
+// reverse import dependency graphs for all its packages.
+// It also returns a mapping from import paths to errors for packages
+// whose loading was not entirely successful.
+// A package may appear in the graph and in the errors mapping.
+func Build(ctxt *build.Context) (forward, reverse Graph, errors map[string]error) {
+	type importEdge struct {
+		from, to string
+	}
+	type pathError struct {
+		path string
+		err  error
+	}
+
+	ch := make(chan interface{})
+
+	var wg sync.WaitGroup
+	buildutil.ForEachPackage(ctxt, func(path string, err error) {
+		wg.Add(1)
+		go func() {
+			defer wg.Done()
+			if err != nil {
+				ch <- pathError{path, err}
+				return
+			}
+
+			bp, err := ctxt.Import(path, "", 0)
+			if err != nil {
+				if _, ok := err.(*build.NoGoError); ok {
+					// empty directory is not an error
+				} else {
+					ch <- pathError{path, err}
+				}
+				// Even in error cases, Import usually returns a package.
+			}
+			if bp != nil {
+				for _, imp := range bp.Imports {
+					ch <- importEdge{path, imp}
+				}
+				for _, imp := range bp.TestImports {
+					ch <- importEdge{path, imp}
+				}
+				for _, imp := range bp.XTestImports {
+					ch <- importEdge{path, imp}
+				}
+			}
+		}()
+	})
+	go func() {
+		wg.Wait()
+		close(ch)
+	}()
+
+	forward = make(Graph)
+	reverse = make(Graph)
+
+	for e := range ch {
+		switch e := e.(type) {
+		case pathError:
+			if errors == nil {
+				errors = make(map[string]error)
+			}
+			errors[e.path] = e.err
+
+		case importEdge:
+			if e.to == "C" {
+				continue // "C" is fake
+			}
+			forward.addEdge(e.from, e.to)
+			reverse.addEdge(e.to, e.from)
+		}
+	}
+
+	return forward, reverse, errors
+}
diff --git a/vendor/vendor.json b/vendor/vendor.json
index 8b32140..e4e069b 100644
--- a/vendor/vendor.json
+++ b/vendor/vendor.json
@@ -56,6 +56,84 @@
 			"revision": "b8348693492ca3791bccfa028f3c19634c11c5b5",
 			"revisionTime": "2015-04-09T14:25:36Z"
 		},
+		{
+			"checksumSHA1": "QBwzyczN2ftqO2Vxag5TS79q32E=",
+			"path": "github.com/visualfc/gotools/astview",
+			"revision": "b8348693492ca3791bccfa028f3c19634c11c5b5",
+			"revisionTime": "2015-04-09T14:25:36Z"
+		},
+		{
+			"checksumSHA1": "wqPqP7RGlukrSMzGKVk1tvyWh1o=",
+			"path": "github.com/visualfc/gotools/command",
+			"revision": "b8348693492ca3791bccfa028f3c19634c11c5b5",
+			"revisionTime": "2015-04-09T14:25:36Z"
+		},
+		{
+			"checksumSHA1": "sA2FN414rFhNEgac/a0IyUR8dMA=",
+			"path": "github.com/visualfc/gotools/docview",
+			"revision": "b8348693492ca3791bccfa028f3c19634c11c5b5",
+			"revisionTime": "2015-04-09T14:25:36Z"
+		},
+		{
+			"checksumSHA1": "LvxdwB9kJ77cFS4qiRAh9ts2nz4=",
+			"path": "github.com/visualfc/gotools/finddoc",
+			"revision": "b8348693492ca3791bccfa028f3c19634c11c5b5",
+			"revisionTime": "2015-04-09T14:25:36Z"
+		},
+		{
+			"checksumSHA1": "Sxih6vWVTlJNBdVNeyCkxI213yI=",
+			"path": "github.com/visualfc/gotools/goapi",
+			"revision": "b8348693492ca3791bccfa028f3c19634c11c5b5",
+			"revisionTime": "2015-04-09T14:25:36Z"
+		},
+		{
+			"checksumSHA1": "RLl3M7ywfbgNYR2HfBywCruQz9c=",
+			"path": "github.com/visualfc/gotools/goimports",
+			"revision": "b8348693492ca3791bccfa028f3c19634c11c5b5",
+			"revisionTime": "2015-04-09T14:25:36Z"
+		},
+		{
+			"checksumSHA1": "R6+qmg1mEs4XhihZd5ujddVI+FI=",
+			"path": "github.com/visualfc/gotools/gopresent",
+			"revision": "b8348693492ca3791bccfa028f3c19634c11c5b5",
+			"revisionTime": "2015-04-09T14:25:36Z"
+		},
+		{
+			"checksumSHA1": "kyKBo2ux+HflucDj/qzoko5YoMA=",
+			"path": "github.com/visualfc/gotools/jsonfmt",
+			"revision": "b8348693492ca3791bccfa028f3c19634c11c5b5",
+			"revisionTime": "2015-04-09T14:25:36Z"
+		},
+		{
+			"checksumSHA1": "QldbuEtO8CONs3q/5mkva+CVeNg=",
+			"path": "github.com/visualfc/gotools/oracle",
+			"revision": "b8348693492ca3791bccfa028f3c19634c11c5b5",
+			"revisionTime": "2015-04-09T14:25:36Z"
+		},
+		{
+			"checksumSHA1": "zG4ar8LbudIKQvsfvAgkBSS0k3Q=",
+			"path": "github.com/visualfc/gotools/pkgs",
+			"revision": "b8348693492ca3791bccfa028f3c19634c11c5b5",
+			"revisionTime": "2015-04-09T14:25:36Z"
+		},
+		{
+			"checksumSHA1": "RQoGIbxntMsUZvi4Js0WQqDBDYM=",
+			"path": "github.com/visualfc/gotools/runcmd",
+			"revision": "b8348693492ca3791bccfa028f3c19634c11c5b5",
+			"revisionTime": "2015-04-09T14:25:36Z"
+		},
+		{
+			"checksumSHA1": "q/EpLJHMTcnbxjLGogryQ6IA7kc=",
+			"path": "github.com/visualfc/gotools/stdlib",
+			"revision": "b8348693492ca3791bccfa028f3c19634c11c5b5",
+			"revisionTime": "2015-04-09T14:25:36Z"
+		},
+		{
+			"checksumSHA1": "qlJsyinWZ07PaOyTYyxXOmhDN/I=",
+			"path": "github.com/visualfc/gotools/types",
+			"revision": "b8348693492ca3791bccfa028f3c19634c11c5b5",
+			"revisionTime": "2015-04-09T14:25:36Z"
+		},
 		{
 			"checksumSHA1": "xe5hMqClV1HmKZ4GVg4bmSsVRE8=",
 			"path": "golang.org/x/text/encoding",
@@ -80,6 +158,91 @@
 			"checksumSHA1": "baiYjEQuZN5kEgOBJPSsZCecTE8=",
 			"path": "golang.org/x/text/transform",
 			"revision": ""
+		},
+		{
+			"checksumSHA1": "jbOdG63FTeIVcvLU5E8XsqK53cc=",
+			"path": "golang.org/x/tools/container/intsets",
+			"revision": ""
+		},
+		{
+			"checksumSHA1": "n7QcM+WctJpMsi0d1m4OKSqW4xU=",
+			"path": "golang.org/x/tools/go/ast/astutil",
+			"revision": ""
+		},
+		{
+			"checksumSHA1": "cfJyCvDHk2MgII9NxbJ9j4Cg4to=",
+			"path": "golang.org/x/tools/go/buildutil",
+			"revision": ""
+		},
+		{
+			"checksumSHA1": "9evbcWFxUJMFmnXQ2ja5765p3iE=",
+			"path": "golang.org/x/tools/go/callgraph",
+			"revision": ""
+		},
+		{
+			"checksumSHA1": "p+hK1c9noXGuHDzFlrFQ/uQfzLQ=",
+			"path": "golang.org/x/tools/go/exact",
+			"revision": ""
+		},
+		{
+			"checksumSHA1": "zr2p6hYCvjutYYPnk3PNVPNrPuI=",
+			"path": "golang.org/x/tools/go/gcimporter",
+			"revision": ""
+		},
+		{
+			"checksumSHA1": "+ZIgPrqQHXeHWYpTf/3M7VmTL84=",
+			"path": "golang.org/x/tools/go/loader",
+			"revision": ""
+		},
+		{
+			"checksumSHA1": "6gaftnO6OdA2QQVEEx/A5RgY6vQ=",
+			"path": "golang.org/x/tools/go/pointer",
+			"revision": ""
+		},
+		{
+			"checksumSHA1": "j+qDyyAVmxUvkG5KKqei99v251w=",
+			"path": "golang.org/x/tools/go/ssa",
+			"revision": ""
+		},
+		{
+			"checksumSHA1": "aSefOysJ8dwgHf8wvL0G5HjI/8I=",
+			"path": "golang.org/x/tools/go/ssa/ssautil",
+			"revision": ""
+		},
+		{
+			"checksumSHA1": "kK8f03iydGnjQtYtj+EQHHdPEl4=",
+			"path": "golang.org/x/tools/go/types",
+			"revision": ""
+		},
+		{
+			"checksumSHA1": "CYSGwDAcpYRoeD2y59we+Udk6bY=",
+			"path": "golang.org/x/tools/go/types/typeutil",
+			"revision": ""
+		},
+		{
+			"checksumSHA1": "p3oUXqh8ecOL76mLRB5h/Qlz9lE=",
+			"path": "golang.org/x/tools/imports",
+			"revision": ""
+		},
+		{
+			"checksumSHA1": "wlx0RRzAPyJqCjnAxfnyiyXiqpA=",
+			"path": "golang.org/x/tools/oracle",
+			"revision": ""
+		},
+		{
+			"checksumSHA1": "iSBk1u2q0C8EBuH4XSAWo/nYT84=",
+			"path": "golang.org/x/tools/oracle/serial",
+			"revision": ""
+		},
+		{
+			"checksumSHA1": "AwIfMW+1I1JYu0RB2/4lSp8c5AU=",
+			"path": "golang.org/x/tools/present",
+			"revision": ""
+		},
+		{
+			"checksumSHA1": "iR5P7/QTdZBU43MEh7KrNSyQXhU=",
+			"path": "golang.org/x/tools/refactor/importgraph",
+			"revision": ""
 		}
 	],
 	"rootPath": "github.com/b3log/wide"