// 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.
 * @author ngl@unipro.ru
 */
import "dart:async";

class C {
  const C();
}
class S0 extends C {}

FutureOr<S0> t0Instance = new Future<S0>.value(new S0());
FutureOr<C> t1Instance = new Future<C>.value(new C());

const t1Default = const C();

//# @T0 = FutureOr<S0>
//# @T1 = FutureOr<C>