| // Copyright (c) 2011, 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 a user-defined interface cannot extend double. | |
| /// @author iefremov | |
| abstract class A extends double {} | |
| // ^ | |
| // [analyzer] unspecified | |
| // [cfe] unspecified | |
| class B implements A {} | |
| // ^ | |
| // [analyzer] unspecified | |
| // [cfe] unspecified | |
| main() { | |
| new B(); | |
| } |