| // 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 S0 is a subtype of |
| /// T1 but Future<S0> is not a subtype of T1 , then a type T0 is not a subtype of |
| /// a type T1. |
| /// @author sgrekhov@unipro.ru |
| |
| import "dart:async"; |
| |
| class T1 { |
| const T1(); |
| } |
| class S0 extends T1 {} |
| |
| FutureOr<S0> t0Instance = Future<S0>.value(new S0()); // Future<S0> is not a subtype of T1 |
| T1 t1Instance = new T1(); |
| |
| const t1Default = const T1(); |
| |
| //# @T0 = FutureOr<S0> |
| //# @T1 = T1 |
