mirror of
https://github.com/golang/go
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35 lines
832 B
Go
35 lines
832 B
Go
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// run
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// Copyright 2017 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 main
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import (
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"fmt"
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"strings"
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)
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type ET struct{}
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func (*ET) Error() string { return "err" }
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func main() {
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check("false", fmt.Sprintf("(*ET)(nil) == error(nil): %v", (*ET)(nil) == error(nil)))
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check("true", fmt.Sprintf("(*ET)(nil) != error(nil): %v", (*ET)(nil) != error(nil)))
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nilET := (*ET)(nil)
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nilError := error(nil)
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check("false", fmt.Sprintf("nilET == nilError: %v", nilET == nilError))
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check("true", fmt.Sprintf("nilET != nilError: %v", nilET != nilError))
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}
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func check(want, gotfull string) {
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got := gotfull[strings.Index(gotfull, ": ")+len(": "):]
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if got != want {
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panic("want " + want + " got " + got + " from " + gotfull)
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}
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}
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