c2047754c3
Compiler changes:
* Change map assignment to use mapassign and assign value directly.
* Change string iteration to use decoderune, faster for ASCII strings.
* Change makeslice to take int, and use makeslice64 for larger values.
* Add new noverflow field to hmap struct used for maps.
Unresolved problems, to be fixed later:
* Commented out test in go/types/sizes_test.go that doesn't compile.
* Commented out reflect.TestStructOf test for padding after zero-sized field.
Reviewed-on: https://go-review.googlesource.com/35231
gotools/:
Updates for Go 1.8rc1.
* Makefile.am (go_cmd_go_files): Add bug.go.
(s-zdefaultcc): Write defaultPkgConfig.
* Makefile.in: Rebuild.
From-SVN: r244456
123 lines
2.8 KiB
Go
123 lines
2.8 KiB
Go
// Copyright 2016 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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// +build ignore
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// This program is run via "go generate" (via a directive in sort.go)
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// to generate zfuncversion.go.
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//
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// It copies sort.go to zfuncversion.go, only retaining funcs which
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// take a "data Interface" parameter, and renaming each to have a
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// "_func" suffix and taking a "data lessSwap" instead. It then rewrites
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// each internal function call to the appropriate _func variants.
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package main
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import (
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"bytes"
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"go/ast"
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"go/format"
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"go/parser"
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"go/token"
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"io/ioutil"
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"log"
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"regexp"
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)
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var fset = token.NewFileSet()
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func main() {
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af, err := parser.ParseFile(fset, "sort.go", nil, 0)
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if err != nil {
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log.Fatal(err)
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}
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af.Doc = nil
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af.Imports = nil
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af.Comments = nil
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var newDecl []ast.Decl
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for _, d := range af.Decls {
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fd, ok := d.(*ast.FuncDecl)
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if !ok {
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continue
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}
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if fd.Recv != nil || fd.Name.IsExported() {
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continue
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}
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typ := fd.Type
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if len(typ.Params.List) < 1 {
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continue
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}
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arg0 := typ.Params.List[0]
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arg0Name := arg0.Names[0].Name
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arg0Type := arg0.Type.(*ast.Ident)
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if arg0Name != "data" || arg0Type.Name != "Interface" {
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continue
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}
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arg0Type.Name = "lessSwap"
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newDecl = append(newDecl, fd)
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}
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af.Decls = newDecl
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ast.Walk(visitFunc(rewriteCalls), af)
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var out bytes.Buffer
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if err := format.Node(&out, fset, af); err != nil {
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log.Fatalf("format.Node: %v", err)
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}
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// Get rid of blank lines after removal of comments.
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src := regexp.MustCompile(`\n{2,}`).ReplaceAll(out.Bytes(), []byte("\n"))
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// Add comments to each func, for the lost reader.
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// This is so much easier than adding comments via the AST
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// and trying to get position info correct.
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src = regexp.MustCompile(`(?m)^func (\w+)`).ReplaceAll(src, []byte("\n// Auto-generated variant of sort.go:$1\nfunc ${1}_func"))
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// Final gofmt.
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src, err = format.Source(src)
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if err != nil {
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log.Fatalf("format.Source: %v on\n%s", err, src)
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}
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out.Reset()
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out.WriteString(`// DO NOT EDIT; AUTO-GENERATED from sort.go using genzfunc.go
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// Copyright 2016 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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`)
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out.Write(src)
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const target = "zfuncversion.go"
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if err := ioutil.WriteFile(target, out.Bytes(), 0644); err != nil {
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log.Fatal(err)
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}
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}
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type visitFunc func(ast.Node) ast.Visitor
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func (f visitFunc) Visit(n ast.Node) ast.Visitor { return f(n) }
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func rewriteCalls(n ast.Node) ast.Visitor {
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ce, ok := n.(*ast.CallExpr)
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if ok {
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rewriteCall(ce)
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}
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return visitFunc(rewriteCalls)
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}
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func rewriteCall(ce *ast.CallExpr) {
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ident, ok := ce.Fun.(*ast.Ident)
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if !ok {
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// e.g. skip SelectorExpr (data.Less(..) calls)
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return
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}
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if len(ce.Args) < 1 {
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return
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}
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ident.Name += "_func"
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}
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