/*
 * 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 if there is more than one entity 
 * with the same name declared in the same scope.
 * Dart is lexically scoped. Scopes may nest. A name or declaration d is 
 * available in scope S if d is in the namespace induced by S or if d is 
 * available in the lexically enclosing scope of S. We say that a name or 
 * declaration d is in scope if d is available in the current scope.
 * @description Checks that it is a compile-time error if a typedef declaration
 * declares a positional and an optional parameter using the same name.
 * @compile-error
 * @author iefremov
 * @reviewer kaigorodov
 */

typedef f(x, [x]);

main() {
  // f foo = (x) {};
  f foo = (x, [y]) {};
}