/*
 * 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 Unless explicitly stated otherwise, all ordinary rules that apply
 * to methods apply to abstract methods.
 * It is a compile error if an instance method m1 overrides an instance member
 * m2 and m1 does not declare all the named parameters declared by m2.
 * @description Checks that a compile error is not produced when the overriding
 * non-abstract instance method has more named parameters than the abstract
 * method being overridden and both have the same non-zero number of required
 * parameters of the same type.
 * @static-clean
 * @author rodionov
 */

abstract class A {
  f(var r, {var x});
}

class C extends A {
  f(var r, {var x, var y}) {}
}

main() {
  new C().f(1, x:1, y:2);
  A a = new C();
  a.f(1, x:1);
}