// 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();
}