| /* |
| * Copyright (c) 2015, 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 It is a compile-time error for a class to attempt to extend, |
| * mix in or implement double. |
| * @description Checks that double cannot be mixed in abstract class |
| * @compile-error |
| * @author sgrekhov@unipro.ru |
| */ |
| |
| class A {} |
| |
| abstract class C extends A with double {} |
| |
| main() { |
| C? c = null; |
| } |
