// Copyright 2019 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 a | |
type A interface { | |
M(i interface{}) interface{} | |
} | |
var a1 A | |
var a2 A | |
func V(p A, k, v interface{}) A { | |
defer func() { a1, a2 = a2, a1 }() | |
return a1 | |
} |