| // Copyright (c) 2017, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| // @dart = 2.9 |
| |
| import "package:expect/expect.dart"; |
| |
| class A {} |
| |
| class B extends A {} |
| |
| void main() { |
| List<A> listOfA = <A>[new B()]; |
| Object o = listOfA; |
| for (B x in o) {} // No error |
| for (B x in listOfA) {} // No error |
| B y; |
| for (y in o) {} // No error |
| for (y in listOfA) {} // No error |
| listOfA[0] = new A(); |
| Expect.throwsTypeError(() { |
| for (B x in o) {} |
| }); |
| Expect.throwsTypeError(() { |
| for (B x in listOfA) {} |
| }); |
| Expect.throwsTypeError(() { |
| for (y in o) {} |
| }); |
| Expect.throwsTypeError(() { |
| for (y in listOfA) {} |
| }); |
| } |