| // 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 syntax separate from class declarations: |
| /// mixinDeclaration : |
| /// metadata? 'mixin' identifier typeParameters? ('on' types)? |
| /// ('implements' types)? '{' mixinMember* '}' |
| /// |
| /// @description Checks that mixin declaration above is correct. |
| /// @author ngl@unipro.ru |
| |
| |
| class B {} |
| class C extends B {} |
| |
| mixin M on B, C {} |
| |
| class A extends C {} |
| |
| class MA extends A with M {} |
| |
| main() { |
| new MA(); |
| } |
