Language/Generics/Superbounded_types/well_bounded_A03_t03.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 Any use of a type [T] which is not well-bounded is a
/// compile-time error.
///
/// @description Checks that it is not an error when a function alias with a
/// type parameter with a bound which is a well-bounded type is declared.
/// @Issue 36959, 37050, 42415
/// @author iarkh@unipro.ru

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

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

main() {
  B b1;

  B<dynamic> b2;
  B<Object?> b3;
  B<void> b4;
  B<Never> b5;

  B<A<dynamic>> b6;
  B<A<Object?>> b7;
  B<A<void>> b8;
  B<A<Never>> b9;

  B<A> b10;
  B<A<A>> b11;
}