| /* |
| * 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. |
| */ |
| /** |
| * @assertion In a mixin declaration like |
| * mixin A<X extends S, Y extends T> on B, C implements D, E { body } |
| * the on clause declares the interfaces B and C as super-class constraints of |
| * the mixin. Having a super-class constaint allows the mixin declaration |
| * instance members to perform super-invocations (like super.foo()) if they are |
| * allowed by a class implementing both B and C. The mixin introduced by A can |
| * then only be applied to classes that implement both B and C. |
| * |
| * @description Checks that mixin declaration can only be applied to classes |
| * that implement both B and C. Test the case when mixin declaration is applied |
| * to the class with implements only one of the interfaces but not implemented |
| * interface is not abstract |
| * @compile-error |
| * @author sgrekhov@unipro.ru |
| */ |
| |
| abstract class B { |
| int get gb1; |
| } |
| class C { |
| int get gc1 => 2; |
| } |
| |
| class A implements B { |
| int get gb1 => 1; |
| int get gc1 => 2; |
| } |
| |
| mixin M on B, C {} |
| |
| class MA extends A with M { |
| } |
| |
| main() { |
| new MA(); |
| } |