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https://github.com/golang/go
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36 lines
786 B
Go
36 lines
786 B
Go
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// Copyright 2013 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package testdata
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func F() {}
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type T struct {
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F func()
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}
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func (T) M() {}
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var Fv = F
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func Comparison() {
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var t T
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var fn func()
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if fn == nil || Fv == nil || t.F == nil {
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// no error; these func vars or fields may be nil
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}
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if F == nil { // ERROR "comparison of function F == nil is always false"
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panic("can't happen")
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}
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if t.M == nil { // ERROR "comparison of function M == nil is always false"
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panic("can't happen")
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}
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if F != nil { // ERROR "comparison of function F != nil is always true"
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if t.M != nil { // ERROR "comparison of function M != nil is always true"
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return
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}
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}
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panic("can't happen")
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}
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