go/test/interface/fail.go
Russ Cox d2cc988429 test: use testlib (fourth 100)
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, bradfitz
CC=golang-dev
https://golang.org/cl/5673079
2012-02-16 23:50:37 -05:00

39 lines
528 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.
// Check that interface conversion fails when method is missing.
package main
type I interface {
Foo()
}
func main() {
shouldPanic(p1)
}
func p1() {
var s *S
var i I
var e interface {}
e = s
i = e.(I)
_ = i
}
type S struct {
}
func shouldPanic(f func()) {
defer func() {
if recover() == nil {
panic("function should panic")
}
}()
f()
}