| /* |
| * 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 when class parameter is |
| * [FutureOr] |
| * @author iarkh@unipro.ru |
| */ |
| import "dart:async"; |
| |
| typedef F<X> = void Function<Y extends X>(); |
| F<X> toF<X>(X x) => null; |
| |
| class A<X extends FutureOr> {} |
| |
| main() { |
| A source; |
| var fsource = toF(source); |
| F<A<FutureOr<dynamic>>> target = fsource; |
| |
| F<A<FutureOr<int>>> target1 = fsource; //# 01: compile-time error |
| F<A<FutureOr<Null>>> target2 = fsource; //# 02: compile-time error |
| |
| A(); |
| } |