mirror of
https://github.com/golang/go
synced 2024-11-23 06:40:05 -07:00
35 lines
832 B
Go
35 lines
832 B
Go
|
// run
|
||
|
|
|
||
|
|
// Copyright 2017 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 main
|
||
|
|
|
||
|
|
import (
|
||
|
|
"fmt"
|
||
|
|
"strings"
|
||
|
|
)
|
||
|
|
|
||
|
|
type ET struct{}
|
||
|
|
|
||
|
|
func (*ET) Error() string { return "err" }
|
||
|
|
|
||
|
|
func main() {
|
||
|
|
check("false", fmt.Sprintf("(*ET)(nil) == error(nil): %v", (*ET)(nil) == error(nil)))
|
||
|
|
check("true", fmt.Sprintf("(*ET)(nil) != error(nil): %v", (*ET)(nil) != error(nil)))
|
||
|
|
|
||
|
|
nilET := (*ET)(nil)
|
||
|
|
nilError := error(nil)
|
||
|
|
|
||
|
|
check("false", fmt.Sprintf("nilET == nilError: %v", nilET == nilError))
|
||
|
|
check("true", fmt.Sprintf("nilET != nilError: %v", nilET != nilError))
|
||
|
|
}
|
||
|
|
|
||
|
|
func check(want, gotfull string) {
|
||
|
|
got := gotfull[strings.Index(gotfull, ": ")+len(": "):]
|
||
|
|
if got != want {
|
||
|
|
panic("want " + want + " got " + got + " from " + gotfull)
|
||
|
|
}
|
||
|
|
}
|