go issue9608 源码
golang issue9608 代码
文件路径：/test/fixedbugs/issue9608.dir/issue9608.go
// Copyright 2015 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
func fail() // unimplemented, to test dead code elimination
// Test dead code elimination in if statements
func init() {
if false {
fail()
}
if 0 == 1 {
fail()
}
}
// Test dead code elimination in ordinary switch statements
func init() {
const x = 0
switch x {
case 1:
fail()
}
switch 1 {
case x:
fail()
}
switch {
case false:
fail()
}
const a = "a"
switch a {
case "b":
fail()
}
const snowman = '☃'
switch snowman {
case '☀':
fail()
}
const zero = float64(0.0)
const one = float64(1.0)
switch one {
case -1.0:
fail()
case zero:
fail()
}
switch 1.0i {
case 1:
fail()
case -1i:
fail()
}
const no = false
switch no {
case true:
fail()
}
// Test dead code elimination in large ranges.
switch 5 {
case 3, 4, 5, 6, 7:
case 0, 1, 2:
fail()
default:
fail()
}
}
func main() {
}
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