1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
|
// run
//go:build !nacl && !js && !wasip1 && !android && !gccgo
// Copyright 2016 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 main
import (
"bytes"
"fmt"
"html/template"
"io/ioutil"
"log"
"os"
"os/exec"
"path/filepath"
)
var tmpl = template.Must(template.New("main").Parse(`
package main
type T struct {
{{range .Names}}
{{.Name}} *string
{{end}}
}
{{range .Names}}
func (t *T) Get{{.Name}}() string {
if t.{{.Name}} == nil {
return ""
}
return *t.{{.Name}}
}
{{end}}
func main() {}
`))
func main() {
const n = 5000
type Name struct{ Name string }
var t struct{ Names []Name }
for i := 0; i < n; i++ {
t.Names = append(t.Names, Name{Name: fmt.Sprintf("H%06X", i)})
}
buf := new(bytes.Buffer)
if err := tmpl.Execute(buf, t); err != nil {
log.Fatal(err)
}
dir, err := ioutil.TempDir("", "issue16037-")
if err != nil {
log.Fatal(err)
}
defer os.RemoveAll(dir)
path := filepath.Join(dir, "ridiculous_number_of_fields.go")
if err := ioutil.WriteFile(path, buf.Bytes(), 0664); err != nil {
log.Fatal(err)
}
out, err := exec.Command("go", "build", "-o="+filepath.Join(dir, "out"), path).CombinedOutput()
if err != nil {
log.Fatalf("build failed: %v\n%s", err, out)
}
}
|
