// 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 Any use of a type [T] which is not well-bounded is a
/// compile-time error.
/// @description Checks that compile error is not thrown when function alias with
/// well bounded type parameters is declared.
/// @Issue 36959, 37050, 42415
/// @author iarkh@unipro.ru


class A<T extends A<T>> {}

typedef B<X extends A<X>> = X Function(X);

main() {
  B<A> b2;
  B<void> b4;
  B<Never> b5;

  B<A<dynamic>> b6;
  B<A<void>> b8;
  B<A<Never>> b9;
}