| // 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 any type other than the types |
| /// int and double to attempt to extend, mix in or implement num. |
| /// @description Checks that a user-defined interface can not extend num. |
| /// @author iefremov |
| |
| |
| abstract class A extends num {} |
| // ^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| |
| class B implements A {} |
| // ^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| |
| main() { |
| new B(); |
| } |
