// 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 no static warning 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 there is no static warnings if m1 has the same set
/// of named parameters as m2 but in a different order.
/// @author iefremov


class A {
  f({var x, var y}) {
    return x + y;
  }
}

class C extends A {
  f({var y, var x}) {
    return x + y;
  }
}

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