mirror of
https://github.com/golang/go
synced 2024-11-26 14:46:47 -07:00
38 lines
703 B
Go
38 lines
703 B
Go
|
// run
|
||
|
|
|
||
|
|
// Copyright 2023 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.
|
||
|
|
|
||
|
|
// The gofrontend used to mishandle this code due to a pass ordering issue.
|
||
|
|
// It was inconsistent as to whether unsafe.Sizeof(byte(0)) was a constant,
|
||
|
|
// and therefore as to whether it was a direct-iface type.
|
||
|
|
|
||
|
|
package main
|
||
|
|
|
||
|
|
import "unsafe"
|
||
|
|
|
||
|
|
type A [unsafe.Sizeof(byte(0))]*byte
|
||
|
|
|
||
|
|
func (r A) V() byte {
|
||
|
|
return *r[0]
|
||
|
|
}
|
||
|
|
|
||
|
|
func F() byte {
|
||
|
|
panic("F") // should never be called
|
||
|
|
}
|
||
|
|
|
||
|
|
type B [unsafe.Sizeof(F())]*byte
|
||
|
|
|
||
|
|
func (r B) V() byte {
|
||
|
|
return *r[0]
|
||
|
|
}
|
||
|
|
|
||
|
|
func main() {
|
||
|
|
b := byte(1)
|
||
|
|
v := A{&b}.V() + B{&b}.V()
|
||
|
|
if v != 2 {
|
||
|
|
panic(v)
|
||
|
|
}
|
||
|
|
}
|