go fail 源码
golang fail 代码
文件路径：/test/interface/fail.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.
// Test 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 (s *S) _() {}
func shouldPanic(f func()) {
defer func() {
if recover() == nil {
panic("function should panic")
}
}()
f()
}
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