/*
 * 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 AIt is a compile-time error if a parameterized type [T] is
 * super-bounded when it is used in any of the following ways:
 *   ...
 *   [T] is an immediate subterm of a redirecting factory constructor signature
 * @description Checks that compile error is not thrown when non-super-bounded
 * type [T] is used in the redirecting factory constructor signature
 * @Issue 37048
 * @author iarkh@unipro.ru
 */

class A<X extends A<X>> {
  A() {}
  factory A.foo1() = C<Null>;
  factory A.foo2() = C<A<Null>>;
  factory A.foo3() = C<A<A<Null>>>;
  factory A.foo4() = C<A<A<A<Null>>>>;

}

class C<X extends A<X>> extends A<X> {
  C() {}
}

main() {}