blob: a2c8729f90d1e0ee0716f12a487de32d8f2a1995 [file] [log] [blame]
* 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
// SharedOptions=--enable-experiment=non-nullable
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