| /* |
| * 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: |
| * Right FutureOr: T1 is FutureOr<S1> and |
| * either T0 <: Future<S1> |
| * or T0 <: S1 |
| * or T0 is X0 and X0 has bound S0 and S0 <: T1 |
| * or T0 is X0 & S0 and S0 <: T1 |
| * @description Check that if a type T1 is Future<S1> and a type T0 is X0 and X0 |
| * has bound S0 and S0 <: Future<S1>, then a type T0 is a subtype of a type T1. |
| * @author ngl@unipro.ru |
| */ |
| // SharedOptions=--enable-experiment=non-nullable |
| import "dart:async"; |
| |
| class S1 { |
| const S1(); |
| } |
| bool testDef(Object error) => true; |
| void onErrorDef() {} |
| FutureOr<S1> onTimeoutDef() => new S1(); |
| |
| class S0 implements Future<S1> { |
| asStream() => getStream<S1>(); |
| catchError(Function onError, {bool test(Object error) = testDef}) => new Future.value(); |
| then<T0>(FutureOr<T0> onValue(S1 value), {Function onError = onErrorDef}) => new Future<T0>.value(); |
| timeout(Duration timeLimit, {FutureOr<S1> onTimeout() = onTimeoutDef}) => new Future.value(); |
| whenComplete(FutureOr action()) => new Future.value(); |
| } |
| |
| Stream<T> getStream<T>() { |
| dynamic d = ""; |
| return d as Stream<T>; |
| } |
| |
| class X0 extends S0 { |
| } |
| |
| X0 t0Instance = new X0(); |
| FutureOr<S1> t1Instance = new Future.value(new S1()); |
| |
| const t1Default = const S1(); |
| |
| //# @T0 = X0 |
| //# @T1 = FutureOr<S1> |