// 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.

// @dart = 2.7

import 'dart:async';

/*spec:nnbd-off|prod:nnbd-off.class: global#Future:deps=[A],implicit=[Future<B<A.T>>,Future<C>],indirect,needsArgs*/
/*spec:nnbd-sdk|prod:nnbd-sdk.class: global#Future:deps=[A],implicit=[Future<B<A.T*>*>,Future<C*>],indirect,needsArgs*/

/*spec:nnbd-off|prod:nnbd-off.class: A:explicit=[FutureOr<B<A.T>>],implicit=[B<A.T>,Future<B<A.T>>],indirect,needsArgs*/
/*spec:nnbd-sdk|prod:nnbd-sdk.class: A:explicit=[FutureOr<B<A.T*>*>*],implicit=[B<A.T*>,Future<B<A.T*>*>],indirect,needsArgs*/
class A<T> {
  m(o) => o is FutureOr<B<T>>;
}

/*spec:nnbd-off|prod:nnbd-off.class: B:deps=[A],explicit=[FutureOr<B<A.T>>],implicit=[B<A.T>,Future<B<A.T>>],needsArgs*/
/*spec:nnbd-sdk|prod:nnbd-sdk.class: B:deps=[A],explicit=[FutureOr<B<A.T*>*>*],implicit=[B<A.T*>,Future<B<A.T*>*>],needsArgs*/
class B<T> {}

/*spec:nnbd-off|prod:nnbd-off.class: C:implicit=[C,Future<C>,FutureOr<C>]*/
/*spec:nnbd-sdk|prod:nnbd-sdk.class: C:implicit=[C,Future<C*>,FutureOr<C*>]*/
class C {}

main() {
  new A<FutureOr<C>>().m(new B<C>());
}