mirror of
https://github.com/golang/go
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df9f4f14b9
Reusing it when multiple comparisons occurred in the same function call led to bad overwriting. Fixes #5162. R=golang-dev, daniel.morsing CC=golang-dev https://golang.org/cl/8174047
89 lines
2.3 KiB
Go
89 lines
2.3 KiB
Go
// runoutput
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// Copyright 2013 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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// issue 5162: bad array equality when multiple comparisons
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// happen in the same expression.
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package main
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import (
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"fmt"
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"strings"
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)
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const template = `
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func CheckEqNNN_TTT() {
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onesA := [NNN]ttt{ONES}
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onesB := [NNN]ttt{ONES}
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twos := [NNN]ttt{TWOS}
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if onesA != onesB {
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println("onesA != onesB in CheckEqNNN_TTT")
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}
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if onesA == twos {
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println("onesA == twos in CheckEqNNN_TTT")
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}
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if onesB == twos {
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println("onesB == twos in CheckEqNNN_TTT")
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}
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if s := fmt.Sprint(onesA == onesB, onesA != twos, onesB != twos); s != "true true true" {
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println("fail in CheckEqNNN_TTT:", s)
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}
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}
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func CheckEqNNN_TTTExtraVar() {
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onesA := [NNN]ttt{ONES}
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onesB := [NNN]ttt{ONES}
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twos := [NNN]ttt{TWOS}
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onesX := onesA
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if onesA != onesB {
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println("onesA != onesB in CheckEqNNN_TTTExtraVar")
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}
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if onesA == twos {
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println("onesA == twos in CheckEqNNN_TTTExtraVar")
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}
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if onesB == twos {
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println("onesB == twos in CheckEqNNN_TTTExtraVar")
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}
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if s := fmt.Sprint(onesA == onesB, onesA != twos, onesB != twos); s != "true true true" {
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println("fail in CheckEqNNN_TTTExtraVar:", s)
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}
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if s := fmt.Sprint(onesB == onesX); s != "true" {
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println("extra var fail in CheckEqNNN_TTTExtraVar")
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}
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}
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`
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func main() {
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fmt.Print("// run\n\n")
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fmt.Print("// THIS FILE IS AUTO-GENERATED\n\n")
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fmt.Print("package main\n\n")
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fmt.Println(`import "fmt"`)
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types := []string{
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"int", "int8", "int16", "int32", "int64",
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"uint", "uint8", "uint16", "uint32", "uint64",
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"float32", "float64"}
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tocall := make([]string, 0, 32*len(types))
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for i := 1; i <= 32; i++ {
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for _, typ := range types {
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src := template
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src = strings.Replace(src, "NNN", fmt.Sprint(i), -1)
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src = strings.Replace(src, "TTT", strings.Title(typ), -1)
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src = strings.Replace(src, "ttt", typ, -1)
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src = strings.Replace(src, "ONES", "1"+strings.Repeat(", 1", i-1), -1)
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src = strings.Replace(src, "TWOS", "2"+strings.Repeat(", 2", i-1), -1)
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fmt.Print(src)
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tocall = append(tocall, fmt.Sprintf("CheckEq%d_%s", i, strings.Title(typ)))
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}
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}
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fmt.Println("func main() {")
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for _, fun := range tocall {
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fmt.Printf("\t%s()\n", fun)
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fmt.Printf("\t%sExtraVar()\n", fun)
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}
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fmt.Println("}")
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}
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