// 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.
/// @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);
}