mirror of
https://github.com/golang/go
synced 2024-11-05 14:46:11 -07:00
4f8578d2c0
Change-Id: I9a45bfc07613eb2210081d306d71f0a4d152eda5 Reviewed-on: https://go-review.googlesource.com/2592 Reviewed-by: Alan Donovan <adonovan@google.com>
105 lines
2.4 KiB
Go
105 lines
2.4 KiB
Go
// Copyright 2014 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package rename
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import (
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"go/ast"
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"os"
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"path/filepath"
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"reflect"
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"runtime"
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"strings"
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"unicode"
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"golang.org/x/tools/go/ast/astutil"
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"golang.org/x/tools/go/types"
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)
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func objectKind(obj types.Object) string {
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switch obj := obj.(type) {
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case *types.PkgName:
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return "imported package name"
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case *types.TypeName:
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return "type"
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case *types.Var:
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if obj.IsField() {
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return "field"
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}
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case *types.Func:
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if obj.Type().(*types.Signature).Recv() != nil {
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return "method"
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}
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}
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// label, func, var, const
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return strings.ToLower(strings.TrimPrefix(reflect.TypeOf(obj).String(), "*types."))
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}
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func typeKind(T types.Type) string {
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return strings.ToLower(strings.TrimPrefix(reflect.TypeOf(T.Underlying()).String(), "*types."))
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}
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// NB: for renamings, blank is not considered valid.
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func isValidIdentifier(id string) bool {
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if id == "" || id == "_" {
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return false
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}
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for i, r := range id {
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if !isLetter(r) && (i == 0 || !isDigit(r)) {
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return false
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}
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}
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return true
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}
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// isLocal reports whether obj is local to some function.
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// Precondition: not a struct field or interface method.
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func isLocal(obj types.Object) bool {
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// [... 5=stmt 4=func 3=file 2=pkg 1=universe]
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var depth int
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for scope := obj.Parent(); scope != nil; scope = scope.Parent() {
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depth++
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}
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return depth >= 4
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}
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func isPackageLevel(obj types.Object) bool {
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return obj.Pkg().Scope().Lookup(obj.Name()) == obj
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}
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// -- Plundered from go/scanner: ---------------------------------------
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func isLetter(ch rune) bool {
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return 'a' <= ch && ch <= 'z' || 'A' <= ch && ch <= 'Z' || ch == '_' || ch >= 0x80 && unicode.IsLetter(ch)
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}
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func isDigit(ch rune) bool {
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return '0' <= ch && ch <= '9' || ch >= 0x80 && unicode.IsDigit(ch)
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}
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// -- Plundered from golang.org/x/tools/oracle -----------------
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// sameFile returns true if x and y have the same basename and denote
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// the same file.
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//
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func sameFile(x, y string) bool {
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if runtime.GOOS == "windows" {
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x = filepath.ToSlash(x)
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y = filepath.ToSlash(y)
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}
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if x == y {
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return true
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}
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if filepath.Base(x) == filepath.Base(y) { // (optimisation)
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if xi, err := os.Stat(x); err == nil {
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if yi, err := os.Stat(y); err == nil {
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return os.SameFile(xi, yi)
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}
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}
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}
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return false
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}
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func unparen(e ast.Expr) ast.Expr { return astutil.Unparen(e) }
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