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Source file test/fixedbugs/issue16037_run.go

Documentation: test/fixedbugs

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

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