// 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 static warning if an instance method m1 overrides an instance member
/// m2, the signature of m2 explicitly specifies a default value for a formal
/// parameter p and the signature of m1 specifies a different default value for
/// p.
/// @description Checks that there are no static warnings if an abstract method
/// overrides an instance method and overridden method does not explicitly
/// specify a default value for its optional parameter.
/// @author msyabro


class C {
  foo([x]) {}
}

abstract class A implements C {
  foo([x = 1]);
  factory A() = D;
}

class D implements A {
  foo([x = 1]) {}
}

main() {
  new A().foo(1);
}