Language/Expressions/Numbers/extend_or_implement_double_t03.dart

// 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.
/// @compile-error
/// @author iefremov


abstract class A extends double {}

class B implements A {}

main() {
  new B();
}