| // 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 [typedef] with [X |
| /// extends A] parameter (covariant) |
| /// Issue 41437 |
| /// @author iarkh@unipro.ru |
| |
| |
| class A<X> {} |
| typedef G<X extends A> = void Function<Y extends X>(); |
| |
| test(G source) { |
| void Function<X extends A<dynamic>>() target = source; |
| |
| void Function<X extends A<Null>>() target1 = source; |
| // ^^^^^^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| |
| void Function<X extends A<Never>>() target2 = source; |
| // ^^^^^^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| } |
| |
| main() {} |