| /* |
| * 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 Further, the interfaces B and C must be compatible. The on clause |
| * introduces a synthetic interface combining B and C, call it A$super, which is |
| * equivalent to the interface of a class declaration of the form: |
| * abstract class A$super<X extends S, Y extends T> implements B, C {} |
| * It is a compile-time error for the mixin declaration if the class declaration |
| * above would not be valid. |
| * |
| * @description Checks that it is a compile-time error for the mixin declaration |
| * if the interfaces B and C are not compatible. |
| * @issue 34713 |
| * @compile-error |
| * @author ngl@unipro.ru |
| * @author sgrekhov@unipro.ru |
| */ |
| |
| class B { |
| int get n => 1; |
| } |
| class C { |
| double get n => 2.0; |
| } |
| |
| mixin M on B, C { |
| } |
| |
| main() { |
| } |
