mirror of
https://github.com/golang/go
synced 2024-11-18 09:34:53 -07:00
af0fc83985
This adds 8 bytes of binary size to every type that has methods. It is the smallest change I could come up with for 1.7. Fixes #16037 Change-Id: Ibe15c3165854a21768596967757864b880dbfeed Reviewed-on: https://go-review.googlesource.com/24070 Reviewed-by: Keith Randall <khr@golang.org> Run-TryBot: David Crawshaw <crawshaw@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
71 lines
1.3 KiB
Go
71 lines
1.3 KiB
Go
// +build !nacl,!android
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// run
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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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package main
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import (
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"bytes"
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"fmt"
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"html/template"
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"io/ioutil"
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"log"
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"os"
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"os/exec"
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"path/filepath"
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)
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var tmpl = template.Must(template.New("main").Parse(`
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package main
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type T struct {
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{{range .Names}}
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{{.Name}} *string
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{{end}}
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}
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{{range .Names}}
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func (t *T) Get{{.Name}}() string {
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if t.{{.Name}} == nil {
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return ""
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}
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return *t.{{.Name}}
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}
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{{end}}
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func main() {}
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`))
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func main() {
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const n = 5000
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type Name struct{ Name string }
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var t struct{ Names []Name }
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for i := 0; i < n; i++ {
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t.Names = append(t.Names, Name{Name: fmt.Sprintf("H%06X", i)})
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}
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buf := new(bytes.Buffer)
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if err := tmpl.Execute(buf, t); err != nil {
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log.Fatal(err)
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}
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dir, err := ioutil.TempDir("", "issue16037-")
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if err != nil {
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log.Fatal(err)
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}
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defer os.RemoveAll(dir)
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path := filepath.Join(dir, "ridiculous_number_of_fields.go")
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if err := ioutil.WriteFile(path, buf.Bytes(), 0664); err != nil {
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log.Fatal(err)
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}
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out, err := exec.Command("go", "build", "-o="+filepath.Join(dir, "out"), path).CombinedOutput()
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if err != nil {
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log.Fatalf("build failed: %v\n%s", err, out)
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}
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}
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