Language/Expressions/Numbers/extend_or_implement_double_t01.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 class cannot extend double.
 * @compile-error
 * @author iefremov
 */

class A extends double {}

main() {
  new A();
}