mirror of
https://github.com/golang/go
synced 2024-11-23 10:30:03 -07:00
2b1c9b4be2
X ,s;^// \$G (\$D/)?\$F\.go *$;// compile;g X ,s;^// \$G (\$D/)?\$F\.go && \$L \$F\.\$A *$;// build;g X ,s;^// \$G (\$D/)?\$F\.go && \$L \$F\.\$A && \./\$A\.out *$;// run;g X ,s;^// errchk \$G( -e)? (\$D/)?\$F\.go *$;// errorcheck;g R=golang-dev CC=golang-dev https://golang.org/cl/5673078
45 lines
693 B
Go
45 lines
693 B
Go
// run
|
|
|
|
// Copyright 2009 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
|
|
|
|
type I interface{}
|
|
|
|
func foo1(i int) int { return i }
|
|
func foo2(i int32) int32 { return i }
|
|
func main() {
|
|
var i I
|
|
i = 1
|
|
var v1 = i.(int)
|
|
if foo1(v1) != 1 {
|
|
panic(1)
|
|
}
|
|
var v2 = int32(i.(int))
|
|
if foo2(v2) != 1 {
|
|
panic(2)
|
|
}
|
|
|
|
shouldPanic(p1)
|
|
}
|
|
|
|
func p1() {
|
|
var i I
|
|
i = 1
|
|
var v3 = i.(int32) // This type conversion should fail at runtime.
|
|
if foo2(v3) != 1 {
|
|
panic(3)
|
|
}
|
|
}
|
|
|
|
func shouldPanic(f func()) {
|
|
defer func() {
|
|
if recover() == nil {
|
|
panic("function should panic")
|
|
}
|
|
}()
|
|
f()
|
|
}
|