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➕ Update vendor

This commit is contained in:
Liang Ding 2018-03-13 13:19:03 +08:00
parent 0b8da63175
commit 982ef9c07f
34 changed files with 9037 additions and 3718 deletions
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37
vendor/github.com/visualfc/gotools/astview/astdoc.go generated vendored
View File

@ -6,11 +6,13 @@
package astview
import (
"fmt"
"go/ast"
"go/token"
"regexp"
"sort"
"strconv"
"strings"
)
// ----------------------------------------------------------------------------
@ -41,6 +43,7 @@ type docReader struct {
funcs map[string]*ast.FuncDecl
imports map[string]int
bugs []*ast.CommentGroup
todos []*TodoDoc
}
func (doc *docReader) init(pkgName string, showAll bool) {
@ -279,8 +282,10 @@ func copyCommentList(list []*ast.Comment) []*ast.Comment {
}
var (
bug_markers = regexp.MustCompile("^/[/*][ \t]*BUG\\(.*\\):[ \t]*") // BUG(uid):
bug_content = regexp.MustCompile("[^ \n\r\t]+") // at least one non-whitespace char
todoList = "TODO,BUG,FIXME,NOTE,SECBUG"
bug_markers = regexp.MustCompile("^/[/*][ \t]*BUG\\(.*\\):[ \t]*") // BUG(uid):
bug_content = regexp.MustCompile("[^ \n\r\t]+") // at least one non-whitespace char
todo_markers = regexp.MustCompile(fmt.Sprintf("^/[/*][ \t]*(%s)[\\s\\:\\(\\,].*$", strings.Replace(todoList, ",", "|", -1)))
)
// addFile adds the AST for a source file to the docReader.
@ -297,19 +302,21 @@ func (doc *docReader) addFile(src *ast.File) {
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})
}
if m := todo_markers.FindStringSubmatchIndex(text); m != nil {
doc.todos = append(doc.todos, &TodoDoc{text[m[2]:m[3]], text[m[2]:], c})
}
// 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
}
@ -519,6 +526,12 @@ func makeBugDocs(list []*ast.CommentGroup) []string {
return d
}
type TodoDoc struct {
Tag string
Text string
Comments *ast.CommentGroup
}
// PackageDoc is the documentation for an entire package.
//
type PackageDoc struct {
@ -532,6 +545,7 @@ type PackageDoc struct {
Vars []*ValueDoc
Funcs []*FuncDoc
Factorys []*FuncDoc
Todos []*TodoDoc
Bugs []string
}
@ -553,6 +567,7 @@ func (doc *docReader) newDoc(importpath string, filenames []string) *PackageDoc
p.Vars = makeValueDocs(doc.values, token.VAR)
p.Funcs = makeFuncDocs(doc.funcs)
p.Bugs = makeBugDocs(doc.bugs)
p.Todos = doc.todos
for _, d := range p.Types {
switch d.Type.Type.(type) {

90
vendor/github.com/visualfc/gotools/astview/astview.go generated vendored
View File

@ -9,14 +9,15 @@ import (
"go/ast"
"go/parser"
"go/token"
"go/types"
"io"
"io/ioutil"
"os"
"path/filepath"
"strings"
"github.com/visualfc/gotools/command"
"golang.org/x/tools/go/types"
"github.com/visualfc/gotools/pkgutil"
)
var Command = &command.Command{
@ -27,9 +28,13 @@ var Command = &command.Command{
}
var astViewStdin bool
var astViewShowEndPos bool
var astViewShowTodo bool
func init() {
Command.Flag.BoolVar(&astViewStdin, "stdin", false, "input from stdin")
Command.Flag.BoolVar(&astViewShowEndPos, "end", false, "show decl end pos")
Command.Flag.BoolVar(&astViewShowTodo, "todo", false, "show todo list")
}
func runAstView(cmd *command.Command, args []string) error {
@ -73,6 +78,8 @@ const (
tag_type_method = "tm"
tag_type_factor = "tf"
tag_type_value = "tv"
tag_todo = "b"
tag_todo_folder = "+b"
)
type PackageView struct {
@ -99,8 +106,11 @@ func (p *PackageView) posFileIndex(pos token.Position) int {
return index
}
func (p *PackageView) posText(pos token.Position) (s string) {
func (p *PackageView) posText(pos token.Position, end token.Position) (s string) {
index := p.posFileIndex(pos)
if astViewShowEndPos {
return fmt.Sprintf("%d:%d:%d:%d:%d", index, pos.Line, pos.Column, end.Line, end.Column)
}
return fmt.Sprintf("%d:%d:%d", index, pos.Line, pos.Column)
}
@ -156,7 +166,11 @@ func ParseFiles(fset *token.FileSet, filenames []string, mode parser.Mode) (pkgs
func PrintFilesTree(filenames []string, w io.Writer, expr bool) error {
fset := token.NewFileSet()
pkgs, pkgsfiles, err := ParseFiles(fset, filenames, parser.AllErrors)
mode := parser.AllErrors
if astViewShowTodo {
mode |= parser.ParseComments
}
pkgs, pkgsfiles, err := ParseFiles(fset, filenames, mode)
if err != nil {
return err
}
@ -182,7 +196,11 @@ func NewFilePackageSource(filename string, f *os.File, expr bool) (*PackageView,
p := new(PackageView)
p.fset = token.NewFileSet()
p.expr = expr
file, err := parser.ParseFile(p.fset, filename, src, 0)
mode := parser.AllErrors
if astViewShowTodo {
mode |= parser.ParseComments
}
file, err := parser.ParseFile(p.fset, filename, src, mode)
if err != nil {
return nil, err
}
@ -200,10 +218,11 @@ func NewFilePackageSource(filename string, f *os.File, expr bool) (*PackageView,
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())
end := p.fset.Position(f.Decl.End())
if p.expr {
fmt.Fprintf(w, "%d,%s,%s,%s@%s\n", level, tag, f.Name, p.posText(pos), types.ExprString(f.Decl.Type))
fmt.Fprintf(w, "%d,%s,%s,%s@%s\n", level, tag, f.Name, p.posText(pos, end), types.ExprString(f.Decl.Type))
} else {
fmt.Fprintf(w, "%d,%s,%s,%s\n", level, tag, f.Name, p.posText(pos))
fmt.Fprintf(w, "%d,%s,%s,%s\n", level, tag, f.Name, p.posText(pos, end))
}
}
}
@ -224,11 +243,12 @@ func (p *PackageView) PrintVars(w io.Writer, vars []*ValueDoc, level int, tag st
for _, s := range v.Decl.Specs {
if m, ok := s.(*ast.ValueSpec); ok {
pos := p.fset.Position(m.Pos())
end := p.fset.Position(m.End())
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))
fmt.Fprintf(w, "%d,%s,%s,%s@%s\n", level, tag, m.Names[i], p.posText(pos, end), types.ExprString(m.Type))
} else {
fmt.Fprintf(w, "%d,%s,%s,%s\n", level, tag, m.Names[i], p.posText(pos))
fmt.Fprintf(w, "%d,%s,%s,%s\n", level, tag, m.Names[i], p.posText(pos, end))
}
}
}
@ -248,7 +268,8 @@ func (p *PackageView) PrintTypes(w io.Writer, types []*TypeDoc, level int) {
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))
end := p.fset.Position(d.Decl.End())
fmt.Fprintf(w, "%d,%s,%s,%s\n", level, tag, d.Type.Name, p.posText(pos, end))
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)
@ -270,10 +291,11 @@ func (p *PackageView) PrintTypeFields(w io.Writer, decl *ast.GenDecl, level int)
}
for _, m := range list.Names {
pos := p.fset.Position(m.Pos())
end := p.fset.Position(m.End())
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))
fmt.Fprintf(w, "%d,%s,%s,%s@%s\n", level, tag_type_value, m.Name, p.posText(pos, end), types.ExprString(list.Type))
} else {
fmt.Fprintf(w, "%d,%s,%s,%s\n", level, tag_type_value, m.Name, p.posText(pos))
fmt.Fprintf(w, "%d,%s,%s,%s\n", level, tag_type_value, m.Name, p.posText(pos, end))
}
}
}
@ -284,7 +306,8 @@ func (p *PackageView) PrintTypeFields(w io.Writer, decl *ast.GenDecl, level int)
}
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))
end := p.fset.Position(m.End())
fmt.Fprintf(w, "%d,%s,%s,%s\n", level, tag_type_method, m.Name, p.posText(pos, end))
}
}
}
@ -299,6 +322,19 @@ func (p *PackageView) PrintImports(w io.Writer, level int, tag, tag_folder strin
fmt.Fprintf(w, "%d,%s,%s\n", level, tag_folder, "Imports")
level++
}
var parentPkg *pkgutil.Package
if pkgutil.IsVendorExperiment() {
for filename, _ := range p.pkg.Files {
if !filepath.IsAbs(filename) {
name, err := filepath.Abs(filename)
if err == nil {
filename = name
}
}
parentPkg = pkgutil.ImportFile(filename)
break
}
}
for _, name := range p.pdoc.Imports {
vname := "\"" + name + "\""
var ps []string
@ -306,10 +342,14 @@ func (p *PackageView) PrintImports(w io.Writer, level int, tag, tag_folder strin
for _, v := range file.Imports {
if v.Path.Value == vname {
pos := p.fset.Position(v.Pos())
ps = append(ps, p.posText(pos))
end := p.fset.Position(v.End())
ps = append(ps, p.posText(pos, end))
}
}
}
if parentPkg != nil {
name = pkgutil.VendoredImportPath(parentPkg, name)
}
fmt.Fprintf(w, "%d,%s,%s,%s\n", level, tag, name, strings.Join(ps, ";"))
}
}
@ -330,6 +370,27 @@ func (p *PackageView) PrintFuncs(w io.Writer, level int, tag_folder string) {
p.printFuncsHelper(w, p.pdoc.Funcs, level, tag_func, tag_func_folder)
}
func (p *PackageView) PrintTodos(w io.Writer, level int, tag, tag_folder string) {
hasFolder := false
if len(p.pdoc.Todos) > 0 {
hasFolder = true
}
if !hasFolder {
return
}
if len(tag_folder) > 0 {
fmt.Fprintf(w, "%d,%s,TodoList\n", level, tag_folder)
level++
}
for _, todo := range p.pdoc.Todos {
c := todo.Comments.List[0]
pos := p.fset.Position(c.Pos())
end := p.fset.Position(c.End())
ps := p.posText(pos, end)
fmt.Fprintf(w, "%d,%s,%s,%s@%s\n", level, tag, todo.Tag, ps, todo.Text)
}
}
func (p *PackageView) PrintPackage(w io.Writer, level int) {
p.PrintHeader(w, level)
level++
@ -338,6 +399,7 @@ func (p *PackageView) PrintPackage(w io.Writer, level int) {
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)
p.PrintTodos(w, level, tag_todo, tag_todo_folder)
}
// level,tag,pos@info

3
vendor/github.com/visualfc/gotools/finddoc/finddoc.go generated vendored
View File

@ -35,6 +35,7 @@ import (
"go/parser"
"go/printer"
"go/token"
"go/types"
"os"
"path"
"path/filepath"
@ -43,8 +44,6 @@ import (
"strings"
"github.com/visualfc/gotools/command"
_ "golang.org/x/tools/go/gcimporter"
"golang.org/x/tools/go/types"
)
const usageDoc = `Find documentation for names.

394
vendor/github.com/visualfc/gotools/goimports/fix.go generated vendored
View File

@ -1,394 +0,0 @@
// 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 != ""
}

206
vendor/github.com/visualfc/gotools/goimports/goimports.go generated vendored
View File

@ -1,206 +0,0 @@
// 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("<standard input>", 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
}

281
vendor/github.com/visualfc/gotools/goimports/imports.go generated vendored
View File

@ -1,281 +0,0 @@
// 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()
}

214
vendor/github.com/visualfc/gotools/goimports/sortimports.go generated vendored
View File

@ -1,214 +0,0 @@
// +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() }

14
vendor/github.com/visualfc/gotools/goimports/sortimports_compat.go generated vendored
View File

@ -1,14 +0,0 @@
// +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

36
vendor/github.com/visualfc/gotools/oracle/oracle.go generated vendored
View File

@ -7,13 +7,11 @@ package oracle
import (
"fmt"
"go/build"
"log"
"os"
"runtime"
"github.com/visualfc/gotools/command"
"golang.org/x/tools/oracle"
"github.com/visualfc/gotools/oracle/oracle"
)
//The mode argument determines the query to perform:
@ -60,21 +58,21 @@ func runOracle(cmd *command.Command, args []string) error {
}
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}
}
}
// 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,
@ -88,7 +86,7 @@ func runOracle(cmd *command.Command, args []string) error {
fmt.Fprintf(os.Stderr, "oracle: %s.\n", err)
return err
}
if mode == "referrers" {
ref := query.Serial().Referrers
if ref != nil {

83
vendor/github.com/visualfc/gotools/oracle/oracle/TODO generated vendored Normal file
View File

@ -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.

260
vendor/github.com/visualfc/gotools/oracle/oracle/callees.go generated vendored Normal file
View File

@ -0,0 +1,260 @@
// 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 go1.5
package oracle
import (
"fmt"
"go/ast"
"go/token"
"go/types"
"sort"
"github.com/visualfc/gotools/oracle/oracle/serial"
"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"
)
// 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 {
// Inspect the receiver type of the selected method.
// If it is concrete, the call is statically dispatched.
// (Due to implicit field selections, it is not enough to look
// at sel.Recv(), the type of the actual receiver expression.)
method := sel.Obj().(*types.Func)
recvtype := method.Type().(*types.Signature).Recv().Type()
if !types.IsInterface(recvtype) {
// static method call
q.result = &calleesTypesResult{
site: e,
callee: method,
}
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.Build()
// 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] }

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// 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"
"github.com/visualfc/gotools/oracle/oracle/serial"
"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"
)
// 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.Build()
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
}

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// 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"
"github.com/visualfc/gotools/oracle/oracle/serial"
"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"
)
// 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.Build()
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 <root>
}
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,
}
}

78
vendor/github.com/visualfc/gotools/oracle/oracle/definition.go generated vendored Normal file
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// 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 go1.5
package oracle
import (
"fmt"
"go/ast"
"go/token"
"go/types"
"github.com/visualfc/gotools/oracle/oracle/serial"
"golang.org/x/tools/go/loader"
)
// 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
}

775
vendor/github.com/visualfc/gotools/oracle/oracle/describe.go generated vendored Normal file
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// 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 go1.6
package oracle
import (
"bytes"
"fmt"
"go/ast"
exact "go/constant"
"go/token"
"go/types"
"log"
"os"
"strings"
"github.com/visualfc/gotools/oracle/oracle/serial"
"golang.org/x/tools/go/ast/astutil"
"golang.org/x/tools/go/loader"
"golang.org/x/tools/go/types/typeutil"
)
// 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{WordSize: 8, MaxAlign: 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 obj types.Object
if n.Name != nil {
obj = qpos.info.Defs[n.Name]
} else {
obj = qpos.info.Implicits[n]
}
pkgname, _ := obj.(*types.PkgName)
if pkgname == nil {
return nil, fmt.Errorf("can't import package %s", n.Path.Value)
}
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"
case *types.Builtin:
return "builtin" // e.g. when describing package "unsafe"
case *types.Nil:
return "nil"
case *types.Label:
return "label"
}
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
}

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vendor/github.com/visualfc/gotools/oracle/oracle/describe15.go generated vendored Normal file
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@ -0,0 +1,786 @@
// 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 go1.5,!go1.6
package oracle
import (
"bytes"
"fmt"
"go/ast"
exact "go/constant"
"go/token"
"go/types"
"log"
"os"
"strings"
"github.com/visualfc/gotools/oracle/oracle/serial"
"golang.org/x/tools/go/ast/astutil"
"golang.org/x/tools/go/loader"
"golang.org/x/tools/go/types/typeutil"
)
// 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", constValString(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 obj types.Object
if n.Name != nil {
obj = qpos.info.Defs[n.Name]
} else {
obj = qpos.info.Implicits[n]
}
pkgname, _ := obj.(*types.PkgName)
if pkgname == nil {
return nil, fmt.Errorf("can't import package %s", n.Path.Value)
}
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), constValString(obj.Val()))
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 = constValString(mem.Val())
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"
case *types.Builtin:
return "builtin" // e.g. when describing package "unsafe"
case *types.Nil:
return "nil"
case *types.Label:
return "label"
}
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
}
// constValString emulates Go 1.6's go/constant.ExactString well enough
// to make the tests pass. This is just a stopgap until we throw away
// all the *15.go files.
func constValString(v exact.Value) string {
if v.Kind() == exact.Float {
f, _ := exact.Float64Val(v)
return fmt.Sprintf("%g", f)
}
return v.String()
}

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vendor/github.com/visualfc/gotools/oracle/oracle/freevars.go generated vendored Normal file
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// 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 go1.5
package oracle
import (
"bytes"
"go/ast"
"go/printer"
"go/token"
"go/types"
"sort"
"github.com/visualfc/gotools/oracle/oracle/serial"
"golang.org/x/tools/go/loader"
)
// 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()
}

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vendor/github.com/visualfc/gotools/oracle/oracle/implements.go generated vendored Normal file
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// 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 go1.5
package oracle
import (
"fmt"
"go/ast"
"go/token"
"go/types"
"reflect"
"sort"
"strings"
"github.com/visualfc/gotools/oracle/oracle/serial"
"golang.org/x/tools/go/loader"
"golang.org/x/tools/go/types/typeutil"
"golang.org/x/tools/refactor/importgraph"
)
// Implements displays the "implements" relation as it pertains to the
// selected type.
// 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)
qpkg, err := importQueryPackage(q.Pos, &lconf)
if err != nil {
return err
}
// Set the packages to search.
if len(q.Scope) > 0 {
// Inspect all packages in the analysis scope, if specified.
if err := setPTAScope(&lconf, q.Scope); err != nil {
return err
}
} else {
// Otherwise inspect the forward and reverse
// transitive closure of the selected package.
// (In theory even this is incomplete.)
_, rev, _ := importgraph.Build(q.Build)
for path := range rev.Search(qpkg) {
lconf.ImportWithTests(path)
}
// TODO(adonovan): for completeness, we should also
// type-check and inspect function bodies in all
// imported packages. This would be expensive, but we
// could optimize by skipping functions that do not
// contain type declarations. This would require
// changing the loader's TypeCheckFuncBodies hook to
// provide the []*ast.File.
}
// 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".
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] }

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// 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 go1.5
// 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
// 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"
"go/types"
"io"
"path/filepath"
"github.com/visualfc/gotools/oracle/oracle/serial"
"golang.org/x/tools/go/ast/astutil"
"golang.org/x/tools/go/buildutil"
"golang.org/x/tools/go/loader"
"golang.org/x/tools/go/pointer"
"golang.org/x/tools/go/ssa"
)
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 {
pkgs := buildutil.ExpandPatterns(lconf.Build, scope)
if len(pkgs) == 0 {
return fmt.Errorf("no packages specified for pointer analysis scope")
}
// The value of each entry in pkgs is true,
// giving ImportWithTests (not Import) semantics.
lconf.ImportPkgs = pkgs
return nil
}
//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 {
for _, testPkg := range testPkgs {
if p := prog.CreateTestMainPackage(testPkg); 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.
// It returns the package's path.
func importQueryPackage(pos string, conf *loader.Config) (string, 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 importPath, 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")
}

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// 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 go1.5
package oracle
import (
"fmt"
"go/ast"
"go/token"
"go/types"
"sort"
"github.com/visualfc/gotools/oracle/oracle/serial"
"golang.org/x/tools/go/loader"
"golang.org/x/tools/go/ssa"
"golang.org/x/tools/go/ssa/ssautil"
)
// 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.Build()
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] }

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// 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 go1.5
package oracle
import (
"fmt"
"go/ast"
"go/token"
"go/types"
"sort"
"github.com/visualfc/gotools/oracle/oracle/serial"
"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"
)
// 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.Build()
// 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)
}
}

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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
}

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vendor/github.com/visualfc/gotools/oracle/oracle/referrers.go generated vendored Normal file
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// 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 go1.5
package oracle
import (
"bytes"
"fmt"
"go/ast"
"go/token"
"go/types"
"io/ioutil"
"sort"
"github.com/visualfc/gotools/oracle/oracle/serial"
"golang.org/x/tools/go/loader"
"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 interface{} // file contents or error
}
var fileinfos []*fileinfo
fileinfosByName := make(map[string]*fileinfo)
// First pass: start the file reads concurrently.
sema := make(chan struct{}, 20) // counting semaphore to limit I/O concurrency
for _, ref := range r.refs {
posn := r.qpos.fset.Position(ref.Pos())
fi := fileinfosByName[posn.Filename]
if fi == nil {
fi = &fileinfo{data: make(chan interface{})}
fileinfosByName[posn.Filename] = fi
fileinfos = append(fileinfos, fi)
// First request for this file:
// start asynchronous read.
go func() {
sema <- struct{}{} // acquire token
content, err := ioutil.ReadFile(posn.Filename)
<-sema // release token
if err != nil {
fi.data <- err
} else {
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 {
v := <-fi.data // wait for I/O completion
// Print one item for all refs in a file that could not
// be loaded (perhaps due to //line directives).
if err, ok := v.(error); ok {
var suffix string
if more := len(fi.refs) - 1; more > 0 {
suffix = fmt.Sprintf(" (+ %d more refs in this file)", more)
}
printf(fi.refs[0], "%v%s", err, suffix)
continue
}
lines := bytes.Split(v.([]byte), []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
}

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// 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"`
}

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@ -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"
"github.com/visualfc/gotools/oracle/oracle/serial"
"golang.org/x/tools/go/ast/astutil"
)
// 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,
}
}

328
vendor/github.com/visualfc/gotools/oracle/oracle/whicherrs.go generated vendored Normal file
View File

@ -0,0 +1,328 @@
// 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 go1.5
package oracle
import (
"fmt"
"go/ast"
"go/token"
"go/types"
"sort"
"github.com/visualfc/gotools/oracle/oracle/serial"
"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"
)
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.Build()
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
}

6
vendor/github.com/visualfc/gotools/pkgs/pkgs.go generated vendored
View File

@ -21,9 +21,9 @@ import (
var Command = &command.Command{
Run: runPkgs,
UsageLine: "pkgs",
Short: "print liteide_stub version",
Long: `Version prints the liteide_stub version.`,
UsageLine: "pkgs [-list|-json] [-std]",
Short: "print go package",
Long: `print go package.`,
}
var (

233
vendor/github.com/visualfc/gotools/pkgutil/pkgutil.go generated vendored Normal file
View File

@ -0,0 +1,233 @@
package pkgutil
import (
"go/build"
"io/ioutil"
"log"
"os"
"path/filepath"
"regexp"
"strings"
)
//var go15VendorExperiment = os.Getenv("GO15VENDOREXPERIMENT") == "1"
func IsVendorExperiment() bool {
return true
}
// matchPattern(pattern)(name) reports whether
// name matches pattern. Pattern is a limited glob
// pattern in which '...' means 'any string' and there
// is no other special syntax.
func matchPattern(pattern string) func(name string) bool {
re := regexp.QuoteMeta(pattern)
re = strings.Replace(re, `\.\.\.`, `.*`, -1)
// Special case: foo/... matches foo too.
if strings.HasSuffix(re, `/.*`) {
re = re[:len(re)-len(`/.*`)] + `(/.*)?`
}
reg := regexp.MustCompile(`^` + re + `$`)
return func(name string) bool {
return reg.MatchString(name)
}
}
// hasPathPrefix reports whether the path s begins with the
// elements in prefix.
func hasPathPrefix(s, prefix string) bool {
switch {
default:
return false
case len(s) == len(prefix):
return s == prefix
case len(s) > len(prefix):
if prefix != "" && prefix[len(prefix)-1] == '/' {
return strings.HasPrefix(s, prefix)
}
return s[len(prefix)] == '/' && s[:len(prefix)] == prefix
}
}
// hasFilePathPrefix reports whether the filesystem path s begins with the
// elements in prefix.
func hasFilePathPrefix(s, prefix string) bool {
sv := strings.ToUpper(filepath.VolumeName(s))
pv := strings.ToUpper(filepath.VolumeName(prefix))
s = s[len(sv):]
prefix = prefix[len(pv):]
switch {
default:
return false
case sv != pv:
return false
case len(s) == len(prefix):
return s == prefix
case len(s) > len(prefix):
if prefix != "" && prefix[len(prefix)-1] == filepath.Separator {
return strings.HasPrefix(s, prefix)
}
return s[len(prefix)] == filepath.Separator && s[:len(prefix)] == prefix
}
}
// treeCanMatchPattern(pattern)(name) reports whether
// name or children of name can possibly match pattern.
// Pattern is the same limited glob accepted by matchPattern.
func treeCanMatchPattern(pattern string) func(name string) bool {
wildCard := false
if i := strings.Index(pattern, "..."); i >= 0 {
wildCard = true
pattern = pattern[:i]
}
return func(name string) bool {
return len(name) <= len(pattern) && hasPathPrefix(pattern, name) ||
wildCard && strings.HasPrefix(name, pattern)
}
}
var isDirCache = map[string]bool{}
func isDir(path string) bool {
result, ok := isDirCache[path]
if ok {
return result
}
fi, err := os.Stat(path)
result = err == nil && fi.IsDir()
isDirCache[path] = result
return result
}
type Package struct {
Root string
Dir string
ImportPath string
}
func ImportFile(fileName string) *Package {
return ImportDir(filepath.Dir(fileName))
}
func ImportDir(dir string) *Package {
pkg, err := build.ImportDir(dir, build.FindOnly)
if err != nil {
return &Package{"", dir, ""}
}
return &Package{pkg.Root, pkg.Dir, pkg.ImportPath}
}
// expandPath returns the symlink-expanded form of path.
func expandPath(p string) string {
x, err := filepath.EvalSymlinks(p)
if err == nil {
return x
}
return p
}
// vendoredImportPath returns the expansion of path when it appears in parent.
// If parent is x/y/z, then path might expand to x/y/z/vendor/path, x/y/vendor/path,
// x/vendor/path, vendor/path, or else stay path if none of those exist.
// vendoredImportPath returns the expanded path or, if no expansion is found, the original.
func VendoredImportPath(parent *Package, path string) (found string) {
if parent == nil || parent.Root == "" {
return path
}
dir := filepath.Clean(parent.Dir)
root := filepath.Join(parent.Root, "src")
if !hasFilePathPrefix(dir, root) {
// Look for symlinks before reporting error.
dir = expandPath(dir)
root = expandPath(root)
}
if !hasFilePathPrefix(dir, root) || len(dir) <= len(root) || dir[len(root)] != filepath.Separator {
log.Println("invalid vendoredImportPath: dir=%q root=%q separator=%q", dir, root, string(filepath.Separator))
return ""
}
vpath := "vendor/" + path
for i := len(dir); i >= len(root); i-- {
if i < len(dir) && dir[i] != filepath.Separator {
continue
}
// Note: checking for the vendor directory before checking
// for the vendor/path directory helps us hit the
// isDir cache more often. It also helps us prepare a more useful
// list of places we looked, to report when an import is not found.
if !isDir(filepath.Join(dir[:i], "vendor")) {
continue
}
targ := filepath.Join(dir[:i], vpath)
if isDir(targ) && hasGoFiles(targ) {
importPath := parent.ImportPath
if importPath == "command-line-arguments" {
// If parent.ImportPath is 'command-line-arguments'.
// set to relative directory to root (also chopped root directory)
importPath = dir[len(root)+1:]
}
// We started with parent's dir c:\gopath\src\foo\bar\baz\quux\xyzzy.
// We know the import path for parent's dir.
// We chopped off some number of path elements and
// added vendor\path to produce c:\gopath\src\foo\bar\baz\vendor\path.
// Now we want to know the import path for that directory.
// Construct it by chopping the same number of path elements
// (actually the same number of bytes) from parent's import path
// and then append /vendor/path.
chopped := len(dir) - i
if chopped == len(importPath)+1 {
// We walked up from c:\gopath\src\foo\bar
// and found c:\gopath\src\vendor\path.
// We chopped \foo\bar (length 8) but the import path is "foo/bar" (length 7).
// Use "vendor/path" without any prefix.
return vpath
}
return importPath[:len(importPath)-chopped] + "/" + vpath
}
}
return path
}
// hasGoFiles reports whether dir contains any files with names ending in .go.
// For a vendor check we must exclude directories that contain no .go files.
// Otherwise it is not possible to vendor just a/b/c and still import the
// non-vendored a/b. See golang.org/issue/13832.
func hasGoFiles(dir string) bool {
fis, _ := ioutil.ReadDir(dir)
for _, fi := range fis {
if !fi.IsDir() && strings.HasSuffix(fi.Name(), ".go") {
return true
}
}
return false
}
// findVendor looks for the last non-terminating "vendor" path element in the given import path.
// If there isn't one, findVendor returns ok=false.
// Otherwise, findVendor returns ok=true and the index of the "vendor".
//
// Note that terminating "vendor" elements don't count: "x/vendor" is its own package,
// not the vendored copy of an import "" (the empty import path).
// This will allow people to have packages or commands named vendor.
// This may help reduce breakage, or it may just be confusing. We'll see.
func findVendor(path string) (index int, ok bool) {
// Two cases, depending on internal at start of string or not.
// The order matters: we must return the index of the final element,
// because the final one is where the effective import path starts.
switch {
case strings.Contains(path, "/vendor/"):
return strings.LastIndex(path, "/vendor/") + 1, true
case strings.HasPrefix(path, "vendor/"):
return 0, true
}
return 0, false
}
func VendorPathToImportPath(path string) string {
if i, ok := findVendor(path); ok {
return path[i+len("vendor/"):]
}
return path
}

15
vendor/github.com/visualfc/gotools/stdlib/mkpkglist.go generated vendored
View File

@ -8,11 +8,6 @@ import (
)
var pkgList = `
cmd/cgo
cmd/fix
cmd/go
cmd/gofmt
cmd/yacc
archive/tar
archive/zip
bufio
@ -25,6 +20,7 @@ compress/zlib
container/heap
container/list
container/ring
context
crypto
crypto/aes
crypto/cipher
@ -51,6 +47,7 @@ debug/elf
debug/gosym
debug/macho
debug/pe
debug/plan9obj
encoding
encoding/ascii85
encoding/asn1
@ -69,12 +66,15 @@ flag
fmt
go/ast
go/build
go/constant
go/doc
go/format
go/importer
go/parser
go/printer
go/scanner
go/token
go/types
hash
hash/adler32
hash/crc32
@ -96,16 +96,19 @@ log
log/syslog
math
math/big
math/bits
math/cmplx
math/rand
mime
mime/multipart
mime/quotedprintable
net
net/http
net/http/cgi
net/http/cookiejar
net/http/fcgi
net/http/httptest
net/http/httptrace
net/http/httputil
net/http/pprof
net/mail
@ -120,6 +123,7 @@ os/signal
os/user
path
path/filepath
plugin
reflect
regexp
regexp/syntax
@ -128,6 +132,7 @@ runtime/cgo
runtime/debug
runtime/pprof
runtime/race
runtime/trace
sort
strconv
strings

14
vendor/github.com/visualfc/gotools/stdlib/mkstdlib.go generated vendored
View File

@ -11,6 +11,7 @@ import (
"fmt"
"go/format"
"io"
"io/ioutil"
"log"
"os"
"path"
@ -40,13 +41,19 @@ func main() {
fmt.Fprintf(&buf, format, args...)
}
outf("// AUTO-GENERATED BY mkstdlib.go\n\n")
outf("package imports\n")
outf("var stdlib = map[string]string{\n")
outf("package stdlib\n")
outf("var Symbols = 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")),
mustOpen(api("go1.4.txt")),
mustOpen(api("go1.5.txt")),
mustOpen(api("go1.6.txt")),
mustOpen(api("go1.7.txt")),
mustOpen(api("go1.8.txt")),
mustOpen(api("go1.9.txt")),
)
sc := bufio.NewScanner(f)
fullImport := map[string]string{} // "zip.NewReader" => "archive/zip"
@ -87,5 +94,6 @@ func main() {
if err != nil {
log.Fatal(err)
}
os.Stdout.Write(fmtbuf)
//os.Stdout.Write(fmtbuf)
ioutil.WriteFile("./zstdlib.go", fmtbuf, 0777)
}

47
vendor/github.com/visualfc/gotools/stdlib/pkglist.go generated vendored
View File

@ -1,41 +1,42 @@
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",
"archive/tar", "archive/zip", "bufio", "bytes",
"compress/bzip2", "compress/flate", "compress/gzip", "compress/lzw",
"compress/zlib", "container/heap", "container/list", "container/ring",
"context", "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",
"debug/gosym", "debug/macho", "debug/pe", "debug/plan9obj",
"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/constant", "go/doc",
"go/format", "go/importer", "go/parser", "go/printer",
"go/scanner", "go/token", "go/types", "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",
"math/bits", "math/cmplx", "math/rand", "mime",
"mime/multipart", "mime/quotedprintable", "net", "net/http",
"net/http/cgi", "net/http/cookiejar", "net/http/fcgi", "net/http/httptest",
"net/http/httptrace", "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", "plugin",
"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",
"runtime/trace", "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 {

5753
vendor/github.com/visualfc/gotools/stdlib/zstdlib.go generated vendored
View File

File diff suppressed because it is too large Load Diff

423
vendor/github.com/visualfc/gotools/types/types.go generated vendored
View File

@ -9,9 +9,11 @@ import (
"fmt"
"go/ast"
"go/build"
"go/importer"
"go/parser"
"go/printer"
"go/token"
"go/types"
"io/ioutil"
"log"
"os"
@ -23,10 +25,9 @@ import (
"time"
"github.com/visualfc/gotools/command"
"github.com/visualfc/gotools/pkgutil"
"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{
@ -46,6 +47,8 @@ var (
typesFindUseAll bool
typesFindInfo bool
typesFindDoc bool
typesTags string
typesTagList = []string{} // exploded version of tags flag; set in main
)
//func init
@ -59,6 +62,7 @@ func init() {
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")
Command.Flag.StringVar(&typesTags, "tags", "", "space-separated list of build tags to apply when parsing")
}
type ObjKind int
@ -77,13 +81,17 @@ const (
ObjLabel
ObjBuiltin
ObjNil
ObjImplicit
ObjUnknown
ObjComment
)
var ObjKindName = []string{"none", "package",
"type", "interface", "struct",
"const", "var", "field",
"func", "method",
"label", "builtin", "nil"}
"label", "builtin", "nil",
"implicit", "unknown", "comment"}
func (k ObjKind) String() string {
if k >= 0 && int(k) < len(ObjKindName) {
@ -93,22 +101,25 @@ func (k ObjKind) String() string {
}
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}",
"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}",
"Sizeof": "func unsafe.Sizeof(any) uintptr",
"Offsetof": "func unsafe.Offsetof(any) uintptr",
"Alignof": "func unsafe.Alignof(any) uintptr",
}
func builtinInfo(id string) string {
@ -119,10 +130,14 @@ func builtinInfo(id string) string {
}
func simpleObjInfo(obj types.Object) string {
s := obj.String()
pkg := obj.Pkg()
s := simpleType(obj.String())
if pkg != nil && pkg.Name() == "main" {
return strings.Replace(s, simpleType(pkg.Path())+".", "", -1)
if pkg != nil {
s = strings.Replace(s, pkg.Path(), pkg.Name(), -1)
s = simpleType(s)
if pkg.Name() == "main" {
s = strings.Replace(s, "main.", "", -1)
}
}
return s
}
@ -152,7 +167,11 @@ func runTypes(cmd *command.Command, args []string) error {
log.Println("time", time.Now().Sub(now))
}()
}
w := NewPkgWalker(&build.Default)
typesTagList = strings.Split(typesTags, " ")
context := build.Default
context.BuildTags = append(typesTagList, context.BuildTags...)
w := NewPkgWalker(&context)
var cursor *FileCursor
if typesFilePos != "" {
var cursorInfo FileCursor
@ -171,6 +190,7 @@ func runTypes(cmd *command.Command, args []string) error {
}
cursor = &cursorInfo
}
w.cursor = cursor
for _, pkgName := range args {
if pkgName == "." {
pkgPath, err := os.Getwd()
@ -181,6 +201,7 @@ func runTypes(cmd *command.Command, args []string) error {
}
conf := &PkgConfig{IgnoreFuncBodies: true, AllowBinary: true, WithTestFiles: true}
if cursor != nil {
cursor.pkgName = pkgName
conf.Cursor = cursor
conf.IgnoreFuncBodies = false
conf.Info = &types.Info{
@ -209,7 +230,7 @@ func runTypes(cmd *command.Command, args []string) error {
}
type FileCursor struct {
pkg string
pkgName string
fileName string
fileDir string
cursorPos int
@ -228,7 +249,6 @@ type PkgConfig struct {
Info *types.Info
XInfo *types.Info
Files map[string]*ast.File
TestFiles map[string]*ast.File
XTestFiles map[string]*ast.File
}
@ -237,8 +257,9 @@ func NewPkgWalker(context *build.Context) *PkgWalker {
context: context,
fset: token.NewFileSet(),
parsedFileCache: map[string]*ast.File{},
importingName: map[string]bool{},
imported: map[string]*types.Package{"unsafe": types.Unsafe},
gcimporter: map[string]*types.Package{"unsafe": types.Unsafe},
gcimported: importer.Default(),
}
}
@ -246,10 +267,12 @@ type PkgWalker struct {
fset *token.FileSet
context *build.Context
current *types.Package
importing types.Package
importingName map[string]bool
parsedFileCache map[string]*ast.File
imported map[string]*types.Package // packages already imported
gcimporter map[string]*types.Package
gcimported types.Importer
cursor *FileCursor
//importing types.Package
}
func contains(list []string, s string) bool {
@ -283,19 +306,25 @@ func (w *PkgWalker) Import(parentDir string, name string, conf *PkgConfig) (pkg
}
}()
if strings.HasPrefix(name, ".") && parentDir != "" {
name = filepath.Join(parentDir, name)
if parentDir != "" {
if strings.HasPrefix(name, ".") {
name = filepath.Join(parentDir, name)
} else if pkgutil.IsVendorExperiment() {
parentPkg := pkgutil.ImportDir(parentDir)
name = pkgutil.VendoredImportPath(parentPkg, name)
}
}
pkg = w.imported[name]
if pkg != nil {
if pkg == &w.importing {
return nil, fmt.Errorf("cycle importing package %q", name)
}
// if pkg == &w.importing {
// return nil, fmt.Errorf("cycle importing package %q", name)
// }
return pkg, nil
}
if typesVerbose {
log.Println("parser pkg", name)
log.Println("parser pkg", parentDir, name)
}
bp, err := w.importPath(name, 0)
@ -311,33 +340,70 @@ func (w *PkgWalker) Import(parentDir string, name string, conf *PkgConfig) (pkg
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)
if w.importingName[checkName] {
return nil, fmt.Errorf("cycle importing package %q", name)
}
filenames := append(append([]string{}, bp.GoFiles...), bp.CgoFiles...)
w.importingName[checkName] = true
// 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)
// }
GoFiles := append(append([]string{}, bp.GoFiles...), bp.CgoFiles...)
XTestFiles := append([]string{}, bp.XTestGoFiles...)
if conf.WithTestFiles {
filenames = append(filenames, bp.TestGoFiles...)
GoFiles = append(GoFiles, bp.TestGoFiles...)
}
if name == "runtime" {
n := fmt.Sprintf("zgoos_%s.go", w.context.GOOS)
if !contains(filenames, n) {
filenames = append(filenames, n)
if !contains(GoFiles, n) {
GoFiles = append(GoFiles, n)
}
n = fmt.Sprintf("zgoarch_%s.go", w.context.GOARCH)
if !contains(filenames, n) {
filenames = append(filenames, n)
if !contains(GoFiles, n) {
GoFiles = append(GoFiles, n)
}
}
parserFiles := func(filenames []string, cursor *FileCursor, xtest bool) (files []*ast.File) {
if conf.Cursor != nil && conf.Cursor.fileName != "" {
cursor := conf.Cursor
f, _ := w.parseFileEx(bp.Dir, cursor.fileName, cursor.src, true)
if f != nil {
cursor.pos = token.Pos(w.fset.File(f.Pos()).Base()) + token.Pos(cursor.cursorPos)
cursor.fileDir = bp.Dir
isTest := strings.HasSuffix(cursor.fileName, "_test.go")
isXTest := false
if isTest && strings.HasSuffix(f.Name.Name, "_test") {
isXTest = true
}
cursor.xtest = isXTest
checkAppend := func(filenames []string, file string) []string {
for _, f := range filenames {
if f == file {
return filenames
}
}
return append(filenames, file)
}
if isXTest {
XTestFiles = checkAppend(XTestFiles, cursor.fileName)
} else {
GoFiles = checkAppend(GoFiles, cursor.fileName)
}
}
}
parserFiles := func(filenames []string, cursor *FileCursor, xtest bool) (files []*ast.File, fileMap map[string]*ast.File) {
fileMap = make(map[string]*ast.File)
for _, file := range filenames {
var f *ast.File
if cursor != nil && cursor.fileName == file {
@ -352,33 +418,19 @@ func (w *PkgWalker) Import(parentDir string, name string, conf *PkgConfig) (pkg
log.Printf("error parsing package %s: %s\n", name, err)
}
files = append(files, f)
fileMap[file] = f
}
return
}
files := parserFiles(filenames, conf.Cursor, false)
xfiles := parserFiles(bp.XTestGoFiles, conf.Cursor, true)
var files []*ast.File
var xfiles []*ast.File
files, conf.Files = parserFiles(GoFiles, conf.Cursor, false)
xfiles, conf.XTestFiles = 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})
},
Importer: &Importer{w, conf, bp.Dir},
Error: func(err error) {
if typesVerbose {
log.Println(err)
@ -389,6 +441,7 @@ func (w *PkgWalker) Import(parentDir string, name string, conf *PkgConfig) (pkg
pkg, err = typesConf.Check(checkName, w.fset, files, conf.Info)
conf.Pkg = pkg
}
w.importingName[checkName] = false
w.imported[name] = pkg
if len(xfiles) > 0 {
@ -399,7 +452,36 @@ func (w *PkgWalker) Import(parentDir string, name string, conf *PkgConfig) (pkg
return
}
type Importer struct {
w *PkgWalker
conf *PkgConfig
dir string
}
func (im *Importer) Import(name string) (pkg *types.Package, err error) {
if im.conf.AllowBinary && im.w.isBinaryPkg(name) {
pkg, err = im.w.gcimported.Import(name)
if pkg != nil && pkg.Complete() {
return
}
// pkg = im.w.gcimporter[name]
// if pkg != nil && pkg.Complete() {
// return
// }
// pkg, err = importer.Default().Import(name)
// if pkg != nil && pkg.Complete() {
// im.w.gcimporter[name] = pkg
// return
// }
}
return im.w.Import(im.dir, name, &PkgConfig{IgnoreFuncBodies: true, AllowBinary: true, WithTestFiles: false})
}
func (w *PkgWalker) parseFile(dir, file string, src interface{}) (*ast.File, error) {
return w.parseFileEx(dir, file, src, typesFindDoc)
}
func (w *PkgWalker) parseFileEx(dir, file string, src interface{}, findDoc bool) (*ast.File, error) {
filename := filepath.Join(dir, file)
f, _ := w.parsedFileCache[filename]
if f != nil {
@ -427,7 +509,7 @@ func (w *PkgWalker) parseFile(dir, file string, src interface{}) (*ast.File, err
if f == nil {
flag := parser.AllErrors
if typesFindDoc {
if findDoc {
flag |= parser.ParseComments
}
f, err = parser.ParseFile(w.fset, filename, src, flag)
@ -441,8 +523,9 @@ func (w *PkgWalker) parseFile(dir, file string, src interface{}) (*ast.File, err
}
func (w *PkgWalker) LookupCursor(pkg *types.Package, conf *PkgConfig, cursor *FileCursor) {
is := w.CheckIsImport(cursor)
if is != nil {
if nm := w.CheckIsName(cursor); nm != nil {
w.LookupName(pkg, conf, cursor, nm)
} else if is := w.CheckIsImport(cursor); is != nil {
if cursor.xtest {
w.LookupImport(conf.XPkg, conf.XInfo, cursor, is)
} else {
@ -453,6 +536,44 @@ func (w *PkgWalker) LookupCursor(pkg *types.Package, conf *PkgConfig, cursor *Fi
}
}
func (w *PkgWalker) LookupName(pkg *types.Package, conf *PkgConfig, cursor *FileCursor, nm *ast.Ident) {
if typesFindDef {
fmt.Println(w.fset.Position(nm.Pos()))
}
if typesFindInfo {
if cursor.xtest {
fmt.Printf("package %s (%q)\n", pkg.Name()+"_test", pkg.Path())
} else {
if pkg.Path() == pkg.Name() {
fmt.Printf("package %s\n", pkg.Name())
} else {
fmt.Printf("package %s (%q)\n", pkg.Name(), pkg.Path())
}
}
}
if !typesFindUse {
return
}
var usages []int
findUsage := func(fileMap map[string]*ast.File) {
for _, f := range fileMap {
if f != nil && f.Name != nil && f.Name.Name == nm.Name {
usages = append(usages, int(f.Name.Pos()))
}
}
}
if cursor.xtest {
findUsage(conf.XTestFiles)
} else {
findUsage(conf.Files)
}
(sort.IntSlice(usages)).Sort()
for _, pos := range usages {
fmt.Println(w.fset.Position(token.Pos(pos)))
}
}
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 {
@ -480,7 +601,7 @@ func (w *PkgWalker) LookupImport(pkg *types.Package, pkgInfo *types.Info, cursor
if fname == fpath {
fmt.Printf("package %s\n", fname)
} else {
fmt.Printf("package %s (\"%s\")\n", fname, fpath)
fmt.Printf("package %s (%q)\n", fname, fpath)
}
}
@ -489,10 +610,13 @@ func (w *PkgWalker) LookupImport(pkg *types.Package, pkgInfo *types.Info, cursor
}
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()))
if _, ok := obj.(*types.PkgName); ok {
usages = append(usages, int(id.Pos()))
}
}
}
(sort.IntSlice(usages)).Sort()
@ -501,6 +625,14 @@ func (w *PkgWalker) LookupImport(pkg *types.Package, pkgInfo *types.Info, cursor
}
}
func testObjKind(obj types.Object, kind ObjKind) bool {
k, err := parserObjKind(obj)
if err != nil {
return false
}
return k == kind
}
func parserObjKind(obj types.Object) (ObjKind, error) {
var kind ObjKind
switch t := obj.(type) {
@ -662,6 +794,14 @@ func IsSameObject(a, b types.Object) bool {
if a.Id() != b.Id() {
return false
}
if a.Type().String() != b.Type().String() {
return false
}
t1, ok1 := a.(*types.TypeName)
t2, ok2 := b.(*types.TypeName)
if ok1 && ok2 {
return t1.Type().String() == t2.Type().String()
}
return a.String() == b.String()
}
@ -698,10 +838,12 @@ func (w *PkgWalker) LookupObjects(conf *PkgConfig, cursor *FileCursor) {
}
}
}
var cursorId *ast.Ident
if cursorObj == nil {
for id, obj := range pkgInfo.Defs {
if cursor.pos >= id.Pos() && cursor.pos <= id.End() {
cursorObj = obj
cursorId = id
cursorObjIsDef = true
break
}
@ -716,13 +858,19 @@ func (w *PkgWalker) LookupObjects(conf *PkgConfig, cursor *FileCursor) {
}
}
}
if cursorObj == nil {
var kind ObjKind
if cursorObj != nil {
var err error
kind, err = parserObjKind(cursorObj)
if err != nil {
log.Fatalln(err)
}
} else if cursorId != nil {
kind = ObjImplicit
} else {
return
}
kind, err := parserObjKind(cursorObj)
if err != nil {
log.Fatalln(err)
}
if kind == ObjField {
if cursorObj.(*types.Var).Anonymous() {
@ -732,8 +880,18 @@ func (w *PkgWalker) LookupObjects(conf *PkgConfig, cursor *FileCursor) {
}
}
}
cursorPkg := cursorObj.Pkg()
cursorPos := cursorObj.Pos()
var cursorPkg *types.Package
var cursorPos token.Pos
if cursorObj != nil {
cursorPkg = cursorObj.Pkg()
cursorPos = cursorObj.Pos()
} else {
cursorPkg = pkg
cursorPos = cursorId.Pos()
}
//var fieldTypeInfo *types.Info
var fieldTypeObj types.Object
// if cursorPkg == pkg {
@ -741,6 +899,8 @@ func (w *PkgWalker) LookupObjects(conf *PkgConfig, cursor *FileCursor) {
// }
cursorIsInterfaceMethod := false
var cursorInterfaceTypeName string
var cursorInterfaceTypeNamed *types.Named
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 {
@ -754,6 +914,7 @@ func (w *PkgWalker) LookupObjects(conf *PkgConfig, cursor *FileCursor) {
cursorInterfaceTypeName = typ.Obj().Name()
}
cursorIsInterfaceMethod = true
cursorInterfaceTypeNamed = named
}
}
} else if kind == ObjField && cursorSelection != nil {
@ -770,6 +931,9 @@ func (w *PkgWalker) LookupObjects(conf *PkgConfig, cursor *FileCursor) {
}
}
}
if typesVerbose {
log.Println("parser", cursorObj, kind, cursorIsInterfaceMethod)
}
if cursorPkg != nil && cursorPkg != pkg &&
kind != ObjPkgName && w.isBinaryPkg(cursorPkg.Path()) {
conf := &PkgConfig{
@ -783,23 +947,41 @@ func (w *PkgWalker) LookupObjects(conf *PkgConfig, cursor *FileCursor) {
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
}
}
}
for k, v := range conf.Info.Defs {
if k != nil && v != nil && IsSameObject(v, cursorInterfaceTypeNamed.Obj()) {
named := v.Type().(*types.Named)
obj, typ := w.lookupNamedMethod(named, cursorObj.Name())
if obj != nil {
cursorObj = obj
cursorPos = obj.Pos()
}
if obj != nil {
cursorObj = obj
}
if typ != nil {
cursorPkg = typ.Obj().Pkg()
cursorInterfaceTypeName = typ.Obj().Name()
}
break
}
}
// 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 {
@ -839,16 +1021,19 @@ func (w *PkgWalker) LookupObjects(conf *PkgConfig, cursor *FileCursor) {
fmt.Println(w.fset.Position(cursorPos))
}
if typesFindInfo {
if kind == ObjField && fieldTypeObj != nil {
/*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 {
} else */
if kind == ObjBuiltin {
fmt.Println(builtinInfo(cursorObj.Name()))
} else if kind == ObjPkgName {
fmt.Println(cursorObj.String())
} else if kind == ObjImplicit {
fmt.Printf("%s is implicit\n", cursorId.Name)
} else if cursorIsInterfaceMethod {
fmt.Println(strings.Replace(simpleObjInfo(cursorObj), "(interface)", cursorPkg.Name()+"."+cursorInterfaceTypeName, 1))
} else {
@ -883,7 +1068,9 @@ func (w *PkgWalker) LookupObjects(conf *PkgConfig, cursor *FileCursor) {
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()))
if _, ok := obj.(*types.PkgName); ok {
usages = append(usages, int(id.Pos()))
}
}
}
} else {
@ -892,9 +1079,17 @@ func (w *PkgWalker) LookupObjects(conf *PkgConfig, cursor *FileCursor) {
// 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()))
if cursorObj != nil {
for id, obj := range pkgInfo.Uses {
if obj == cursorObj { //!= nil && cursorObj.Pos() == obj.Pos() {
usages = append(usages, int(id.Pos()))
}
}
} else {
for id, obj := range pkgInfo.Uses {
if obj != nil && obj.Pos() == cursorPos { //!= nil && cursorObj.Pos() == obj.Pos() {
usages = append(usages, int(id.Pos()))
}
}
}
}
@ -907,8 +1102,9 @@ func (w *PkgWalker) LookupObjects(conf *PkgConfig, cursor *FileCursor) {
xpkg_path = conf.XPkg.Path()
}
if cursorPkg != nil && (cursorPkg.Path() == pkg_path ||
cursorPkg.Path() == xpkg_path) {
if cursorPkg != nil &&
(cursorPkg.Path() == pkg_path || cursorPkg.Path() == xpkg_path) &&
kind != ObjPkgName {
usages = append(usages, int(cursorPos))
}
@ -957,7 +1153,12 @@ func (w *PkgWalker) LookupObjects(conf *PkgConfig, cursor *FileCursor) {
uses_paths = append(uses_paths, cursorPkg.Path())
}
buildutil.ForEachPackage(&build.Default, func(importPath string, err error) {
cursorPkgPath := cursorObj.Pkg().Path()
if pkgutil.IsVendorExperiment() {
cursorPkgPath = pkgutil.VendorPathToImportPath(cursorPkgPath)
}
buildutil.ForEachPackage(w.context, func(importPath string, err error) {
if err != nil {
return
}
@ -973,7 +1174,7 @@ func (w *PkgWalker) LookupObjects(conf *PkgConfig, cursor *FileCursor) {
find = true
} else {
for _, v := range bp.Imports {
if v == cursorObj.Pkg().Path() {
if v == cursorPkgPath {
find = true
break
}
@ -1031,6 +1232,20 @@ func (w *PkgWalker) LookupObjects(conf *PkgConfig, cursor *FileCursor) {
}
}
func (w *PkgWalker) CheckIsName(cursor *FileCursor) *ast.Ident {
if cursor.fileDir == "" {
return nil
}
file, _ := w.parseFile(cursor.fileDir, cursor.fileName, cursor.src)
if file == nil {
return nil
}
if inRange(file.Name, cursor.pos) {
return file.Name
}
return nil
}
func (w *PkgWalker) CheckIsImport(cursor *FileCursor) *ast.ImportSpec {
if cursor.fileDir == "" {
return nil

78
vendor/vendor.json vendored
View File

@ -5,8 +5,8 @@
{
"checksumSHA1": "ZesPb1w0u5/uv/fdVc+G6wOee30=",
"path": "github.com/b3log/wide",
"revision": "0a51a03f35a3fa9edbfa790698aa615f4dd49783",
"revisionTime": "2018-03-13T05:05:45Z"
"revision": "0b8da631759171441b7c46b78151fbf6345d5bb8",
"revisionTime": "2018-03-13T05:11:10Z"
},
{
"checksumSHA1": "83iEp3SqOoIkZUYyR7BOVP4vaGE=",
@ -71,10 +71,10 @@
"revisionTime": "2018-02-17T01:27:43Z"
},
{
"checksumSHA1": "QBwzyczN2ftqO2Vxag5TS79q32E=",
"checksumSHA1": "h9/MfYdq0vlJ5n/MszzARxhAY88=",
"path": "github.com/visualfc/gotools/astview",
"revision": "b8348693492ca3791bccfa028f3c19634c11c5b5",
"revisionTime": "2015-04-09T14:25:36Z"
"revision": "a74583d2ad8773983f273657291df981033308a4",
"revisionTime": "2018-02-17T01:27:43Z"
},
{
"checksumSHA1": "02f7N5GTTddWpIDhsRthRKZs4nI=",
@ -85,8 +85,8 @@
{
"checksumSHA1": "sA2FN414rFhNEgac/a0IyUR8dMA=",
"path": "github.com/visualfc/gotools/docview",
"revision": "b8348693492ca3791bccfa028f3c19634c11c5b5",
"revisionTime": "2015-04-09T14:25:36Z"
"revision": "a74583d2ad8773983f273657291df981033308a4",
"revisionTime": "2018-02-17T01:27:43Z"
},
{
"checksumSHA1": "5sCU5oJIkeXHHhzNyzusSH+de/8=",
@ -95,16 +95,16 @@
"revisionTime": "2018-02-17T01:27:43Z"
},
{
"checksumSHA1": "LvxdwB9kJ77cFS4qiRAh9ts2nz4=",
"checksumSHA1": "HmZqKNWLGAznshKi6RaoNCfUiX4=",
"path": "github.com/visualfc/gotools/finddoc",
"revision": "b8348693492ca3791bccfa028f3c19634c11c5b5",
"revisionTime": "2015-04-09T14:25:36Z"
"revision": "a74583d2ad8773983f273657291df981033308a4",
"revisionTime": "2018-02-17T01:27:43Z"
},
{
"checksumSHA1": "Sxih6vWVTlJNBdVNeyCkxI213yI=",
"path": "github.com/visualfc/gotools/goapi",
"revision": "b8348693492ca3791bccfa028f3c19634c11c5b5",
"revisionTime": "2015-04-09T14:25:36Z"
"revision": "a74583d2ad8773983f273657291df981033308a4",
"revisionTime": "2018-02-17T01:27:43Z"
},
{
"checksumSHA1": "o0usAkdrTaqufvGTZu++Cc/DVMM=",
@ -127,8 +127,8 @@
{
"checksumSHA1": "R6+qmg1mEs4XhihZd5ujddVI+FI=",
"path": "github.com/visualfc/gotools/gopresent",
"revision": "b8348693492ca3791bccfa028f3c19634c11c5b5",
"revisionTime": "2015-04-09T14:25:36Z"
"revision": "a74583d2ad8773983f273657291df981033308a4",
"revisionTime": "2018-02-17T01:27:43Z"
},
{
"checksumSHA1": "f8zd5auG22z/GqXqW9giRDYEw6A=",
@ -139,32 +139,50 @@
{
"checksumSHA1": "kyKBo2ux+HflucDj/qzoko5YoMA=",
"path": "github.com/visualfc/gotools/jsonfmt",
"revision": "b8348693492ca3791bccfa028f3c19634c11c5b5",
"revisionTime": "2015-04-09T14:25:36Z"
"revision": "a74583d2ad8773983f273657291df981033308a4",
"revisionTime": "2018-02-17T01:27:43Z"
},
{
"checksumSHA1": "QldbuEtO8CONs3q/5mkva+CVeNg=",
"checksumSHA1": "1B56213xrQhxQG1+ZILXNK6cuoo=",
"path": "github.com/visualfc/gotools/oracle",
"revision": "b8348693492ca3791bccfa028f3c19634c11c5b5",
"revisionTime": "2015-04-09T14:25:36Z"
"revision": "a74583d2ad8773983f273657291df981033308a4",
"revisionTime": "2018-02-17T01:27:43Z"
},
{
"checksumSHA1": "zG4ar8LbudIKQvsfvAgkBSS0k3Q=",
"checksumSHA1": "YwA6y+SSXb/JiRGCNowOTrxzP5c=",
"path": "github.com/visualfc/gotools/oracle/oracle",
"revision": "a74583d2ad8773983f273657291df981033308a4",
"revisionTime": "2018-02-17T01:27:43Z"
},
{
"checksumSHA1": "QlJ4yti//o5hoD6w8J6UgLeWjHI=",
"path": "github.com/visualfc/gotools/oracle/oracle/serial",
"revision": "a74583d2ad8773983f273657291df981033308a4",
"revisionTime": "2018-02-17T01:27:43Z"
},
{
"checksumSHA1": "rPh1Qefw9BjwxY/jcpXWePPwYCU=",
"path": "github.com/visualfc/gotools/pkgs",
"revision": "b8348693492ca3791bccfa028f3c19634c11c5b5",
"revisionTime": "2015-04-09T14:25:36Z"
"revision": "a74583d2ad8773983f273657291df981033308a4",
"revisionTime": "2018-02-17T01:27:43Z"
},
{
"checksumSHA1": "dnnib3Gp6gDR8f1HSd4q2DENHiM=",
"path": "github.com/visualfc/gotools/pkgutil",
"revision": "a74583d2ad8773983f273657291df981033308a4",
"revisionTime": "2018-02-17T01:27:43Z"
},
{
"checksumSHA1": "RQoGIbxntMsUZvi4Js0WQqDBDYM=",
"path": "github.com/visualfc/gotools/runcmd",
"revision": "b8348693492ca3791bccfa028f3c19634c11c5b5",
"revisionTime": "2015-04-09T14:25:36Z"
"revision": "a74583d2ad8773983f273657291df981033308a4",
"revisionTime": "2018-02-17T01:27:43Z"
},
{
"checksumSHA1": "q/EpLJHMTcnbxjLGogryQ6IA7kc=",
"checksumSHA1": "nQZTp19L2U+0vVarHKt+3PcsrJM=",
"path": "github.com/visualfc/gotools/stdlib",
"revision": "b8348693492ca3791bccfa028f3c19634c11c5b5",
"revisionTime": "2015-04-09T14:25:36Z"
"revision": "a74583d2ad8773983f273657291df981033308a4",
"revisionTime": "2018-02-17T01:27:43Z"
},
{
"checksumSHA1": "6CSw3Gtu+hJ6QTfhJ+985cualxs=",
@ -173,10 +191,10 @@
"revisionTime": "2018-02-17T01:27:43Z"
},
{
"checksumSHA1": "qlJsyinWZ07PaOyTYyxXOmhDN/I=",
"checksumSHA1": "7NOVBr5xAnJIiAGOnIPCvTSxKO4=",
"path": "github.com/visualfc/gotools/types",
"revision": "b8348693492ca3791bccfa028f3c19634c11c5b5",
"revisionTime": "2015-04-09T14:25:36Z"
"revision": "a74583d2ad8773983f273657291df981033308a4",
"revisionTime": "2018-02-17T01:27:43Z"
},
{
"checksumSHA1": "xe5hMqClV1HmKZ4GVg4bmSsVRE8=",