Language/Classes/Abstract_Instance_Members/override_default_value_t07.dart

// 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 another abstract method and overridden method does not explicitly
 * specify a default value for its optional parameter.
 * @static-clean
 * @author msyabro
 */

abstract class A {
  foo([x]);
}

abstract class C extends A {
  foo([x = 1]);
}

main() {
  C? c = null;
}