/*
 * 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 the name of a named
 * optional parameter begins with an _ character.
 * @description Checks that it is a compile-time error if the name of a named
 * optional parameter begins with an '_' character.
 * @compile-error
 * @author rodionov
 */

class A {
  var _p;
  A({this._p: ""}) {
    print(_p);
  }
}

main() {
  new A(_p: "Optional parameters names must not begin with an underscore!");
}