| // 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. |
| |
| package a |
| |
| func F() {} |
| |
| type T struct { |
| F func() |
| } |
| |
| func (T) M() {} |
| |
| var Fv = F |
| |
| func Comparison() { |
| var t T |
| var fn func() |
| if fn == nil || Fv == nil || t.F == nil { |
| // no error; these func vars or fields may be nil |
| } |
| if F == nil { // want "comparison of function F == nil is always false" |
| panic("can't happen") |
| } |
| if t.M == nil { // want "comparison of function M == nil is always false" |
| panic("can't happen") |
| } |
| if F != nil { // want "comparison of function F != nil is always true" |
| if t.M != nil { // want "comparison of function M != nil is always true" |
| return |
| } |
| } |
| panic("can't happen") |
| } |
