| // 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 = 2.9 |
| |
| /// @assertion A mixin declaration introduces a mixin and an interface, but not a |
| /// class. |
| /// |
| /// @description Checks that a mixin declaration introduces an interface and |
| /// therefore can be implemented. |
| /// @author sgrekhov@unipro.ru |
| |
| |
| class C { |
| } |
| |
| mixin M on C { |
| } |
| |
| class MA implements M {} |
| |
| main() { |
| MA m = new MA(); |
| } |
