blob: 0b119bd0cd423f60c80c0db6e9ca4adf3aa2bed1 [file] [log] [blame]
// Copyright (c) 2020, 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
/// NORM(FutureOr<T>) =
/// let S be NORM(T)
/// if S is a top type then S
/// if S is Object then S
/// if S is Object* then S
/// if S is Never then Future<Never>
/// if S is Null then Future<Null>?
/// else FutureOr<S>
/// @description Checks that if NORM(T) is a top type then NORM(FutureOr<T>) =
/// NORM(T)
/// @author
// Requirements=nnbd-strong
import 'dart:async';
class A<X> {}
class B<X> implements A<X> {}
class CD1 extends B<FutureOr<dynamic>> implements A<dynamic> {}
class CD2 extends B<FutureOr<dynamic>> implements A<dynamic?> {}
class CO extends B<FutureOr<Object?>> implements A<Object?> {}
class CV extends B<FutureOr<void>> implements A<void> {}
main() {
new CD1();
new CD2();
new CO();
new CV();