blob: 0544abd508e3302f64018b722bf5a70eef088457 [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 Null then
/// NORM(FutureOr<T>) = Future<Null>?
/// @author
// Requirements=nnbd-strong
import 'dart:async';
class A<X> {}
class B<X> implements A<X> {}
class C extends B<FutureOr<Null>> implements A<Future<Null>?> {}
main() {
new C();