Language/Classes/Abstract_Instance_Members/override_default_value_t10.dart

// Copyright (c) 2019, 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 there is no 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 it is no static warning if an abstract method
 * overrides an instance method and has a different default value for its
 * optional parameter. Test type aliases
 *
 * See https://github.com/dart-lang/language/commit/6df1612f667f7fdd28dd3b66a89e06b75ea98d2a
 *
 * @issue 27476
 * @author sgrekhov@unipro.ru
 */
// SharedOptions=--enable-experiment=nonfunction-type-aliases
class A {
  foo([x = 1]) {}
}
typedef AAlias = A;

class C extends AAlias {
  foo([x = '']);
}

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