Rémy Oudompheng | 2d3216f | 2013-04-05 21:24:07 +0200 | [diff] [blame] | 1 | // errorcheck |
| 2 | |
| 3 | // Copyright 2013 The Go Authors. All rights reserved. |
| 4 | // Use of this source code is governed by a BSD-style |
| 5 | // license that can be found in the LICENSE file. |
| 6 | |
| 7 | // Issue 4909: compiler incorrectly accepts unsafe.Offsetof(t.x) |
| 8 | // where x is a field of an embedded pointer field. |
| 9 | |
| 10 | package p |
| 11 | |
| 12 | import ( |
| 13 | "unsafe" |
| 14 | ) |
| 15 | |
| 16 | type T struct { |
| 17 | A int |
| 18 | *B |
| 19 | } |
| 20 | |
| 21 | func (t T) Method() {} |
| 22 | |
| 23 | type B struct { |
| 24 | X, Y int |
| 25 | } |
| 26 | |
| 27 | var t T |
| 28 | var p *T |
| 29 | |
| 30 | const N1 = unsafe.Offsetof(t.X) // ERROR "indirection" |
| 31 | const N2 = unsafe.Offsetof(p.X) // ERROR "indirection" |
| 32 | const N3 = unsafe.Offsetof(t.B.X) // valid |
| 33 | const N4 = unsafe.Offsetof(p.B.X) // valid |
| 34 | const N5 = unsafe.Offsetof(t.Method) // ERROR "method value" |
| 35 | const N6 = unsafe.Offsetof(p.Method) // ERROR "method value" |