// Copyright 2021 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 p type T1 interface{ M() } func F1() T1 var _ = F1().(*X1 /* ERROR undeclared name: X1 */) func _() { switch F1().(type) { case *X1 /* ERROR undeclared name: X1 */ : } } type T2 interface{ M() } func F2() T2 var _ = F2 /* ERROR impossible type assertion: F2\(\)\.\(\*X2\)\n\t\*X2 does not implement T2 \(missing method M\) */ ().(*X2) type X2 struct{} func _() { switch F2().(type) { case * /* ERROR impossible type switch case: \*X2\n\tF2\(\) \(value of type T2\) cannot have dynamic type \*X2 \(missing method M\) */ X2: } }