// 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 If a declaration d named n is in the namespace induced by a 
/// scope S, then d hides any declaration named n that is available in the 
/// lexically enclosing scope of S.
/// @description Checks that no static warning is produced if a function 
/// parameter hides a function name.
/// @author iefremov

import "../../../Utils/expect.dart";

main() {
  int g() {return 1;}
  int f(int g()) {return g();}
  Expect.equals(2, f(() => 2));
}
