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https://github.com/golang/go
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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
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// Copyright 2009 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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type I interface{}
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func foo1(i int) int { return i }
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func foo2(i int32) int32 { return i }
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func main() {
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var i I
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i = 1
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var v1 = i.(int)
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if foo1(v1) != 1 {
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panic(1)
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}
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var v2 = int32(i.(int))
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if foo2(v2) != 1 {
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panic(2)
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}
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shouldPanic(p1)
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}
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func p1() {
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var i I
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i = 1
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var v3 = i.(int32) // This type conversion should fail at runtime.
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if foo2(v3) != 1 {
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panic(3)
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}
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}
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func shouldPanic(f func()) {
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defer func() {
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if recover() == nil {
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panic("function should panic")
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}
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}()
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f()
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}
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