| // Copyright (c) 2018, 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 = 2.7 |
| |
| // dart2jsOptions=--strong |
| |
| // Regression test for issue 32770. |
| |
| import 'package:expect/expect.dart'; |
| |
| dynamic f; |
| dynamic g; |
| |
| class A {} |
| |
| class B extends A {} |
| |
| class C extends A {} |
| |
| class Class<T> { |
| void Function(E) method<E, F extends E>(bool Function(bool) callback) { |
| return (E event) { |
| g = () => callback(event is F); |
| }; |
| } |
| } |
| |
| main() { |
| f = new Class<String>().method<A, B>((o) => o); |
| f(new B()); |
| Expect.isTrue(g()); |
| f(new C()); |
| Expect.isFalse(g()); |
| } |