| // 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 We say that a type T0 is a subtype of a type T1 (written T0 <: T1) |
| * when: |
| * Left FutureOr: T0 is FutureOr<S0> |
| * and Future<S0> <: T1 |
| * and S0 <: T1 |
| * @description Check that if a type T0 is FutureOr<S0> and Future<S0> and S0 |
| * are subtypes of a type T1, then a type T0 is a subtype of a type T1. Case |
| * when an instance of T0 is an instance of Future<S0> type and S0 is a generic |
| * type |
| * @author sgrekhov@unipro.ru |
| */ |
| import "dart:async"; |
| |
| class A {} |
| class B extends A {} |
| class C<X> { |
| const C(); |
| } |
| class S0<X> extends C<X> {} |
| |
| FutureOr<S0<B>> t0Instance = new Future<S0<B>>.value(new S0<B>()); |
| FutureOr<C<A>> t1Instance = new Future<C<A>>.value(new C<A>()); |
| |
| const t1Default = const C<A>(); |
| |
| //# @T0 = FutureOr<S0<B>> |
| //# @T1 = FutureOr<C<A>> |
