| // Copyright (c) 2013, 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 test program for constructors and initializers. |
| |
| // @dart = 2.9 |
| |
| // Check function subtyping. |
| |
| import 'package:expect/expect.dart'; |
| |
| class A {} |
| |
| class B extends A {} |
| |
| class C extends A {} |
| |
| class Class<K, V> { |
| void forEach(void f(K k, V v)) {} |
| } |
| |
| main() { |
| Class<B, C> c = new Class<B, C>(); |
| c.forEach((A a, A b) {}); |
| c.forEach((B a, C b) {}); |
| Expect.throwsTypeError(() => c.forEach((A a, B b) {} as dynamic)); |
| } |