go issue4909a 源码
golang issue4909a 代码
文件路径：/test/fixedbugs/issue4909a.go
// errorcheck
// Copyright 2013 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.
// Issue 4909: compiler incorrectly accepts unsafe.Offsetof(t.x)
// where x is a field of an embedded pointer field.
package p
import (
"unsafe"
)
type T struct {
A int
*B
}
func (t T) Method() {}
type B struct {
X, Y int
}
var t T
var p *T
const N1 = unsafe.Offsetof(t.X) // ERROR "indirection|field X is embedded via a pointer in T"
const N2 = unsafe.Offsetof(p.X) // ERROR "indirection|field X is embedded via a pointer in T"
const N3 = unsafe.Offsetof(t.B.X) // valid
const N4 = unsafe.Offsetof(p.B.X) // valid
const N5 = unsafe.Offsetof(t.Method) // ERROR "method value"
const N6 = unsafe.Offsetof(p.Method) // ERROR "method value"
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