// Copyright (c) 2018, 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 Let [G] be a generic class or parameterized type alias with formal
 * type parameter declarations [F1] .. [Fk] containing formal type parameters
 * [X1] .. [Xk] and bounds [B1] .. [Bk]. We say that the formal type parameter
 * [Xj] has a simple bound when one of the following requirements is satisfied:
 * [Bj] is omitted.
 * [Bj] is included, but does not contain any of [X1] .. [Xk]. If [Bj] contains
 * a type [T] on the form qualified (for instance, [C] or [p.D]) which denotes a
 * generic class or parameterized type alias [G1] (that is, [T] is a raw type),
 * every type argument of [G1] has a simple bound.
 * @description Checks that simple bounds are correct for the class with
 * nullable function parameter (covariant)
 * @author iarkh@unipro.ru
 */

import "../../../Utils/expect.dart";

typedef G<X> = X Function();
class A<X extends G<int?>?> {}

main() {
  A? source;
  var fsource = toF(source);

  F<A<G<int?>?>?>? target = fsource;

  F<A<G<int>>>? target01 = fsource;
//                         ^^^^^^^
// [analyzer] unspecified
// [cfe] unspecified

  F<A<G<int?>>?>? target02 = fsource;
//                           ^^^^^^^
// [analyzer] unspecified
// [cfe] unspecified

  F<A<G<int>?>?>? target03 = fsource;
//                           ^^^^^^^
// [analyzer] unspecified
// [cfe] unspecified

  F<A<G<dynamic>?>?>? target1 = fsource;
//                             ^^^^^^^
// [analyzer] unspecified
// [cfe] unspecified

  F<A<G<Null>?>?>? target2 = fsource;
//                          ^^^^^^^
// [analyzer] unspecified
// [cfe] unspecified

  F<A<G<String>?>?>? target3 = fsource;
//                             ^^^^^^^
// [analyzer] unspecified
// [cfe] unspecified

  F<A<G<Never>?>?>? target4 = fsource;
//                           ^^^^^^^
// [analyzer] unspecified
// [cfe] unspecified

  A();
}