| // Copyright (c) 2021, 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 Let f be an asynchronous non-generator function with declared |
| /// return type T. Then the future value type of f is futureValueType(T). The |
| /// function futureValueType is defined as follows: |
| /// |
| /// futureValueType(S?) = futureValueType(S), for all S. |
| /// futureValueType(S*) = futureValueType(S), for all S. |
| /// futureValueType(Future<S>) = S, for all S. |
| /// futureValueType(FutureOr<S>) = S, for all S. |
| /// futureValueType(void) = void. |
| /// futureValueType(dynamic) = dynamic. |
| /// Otherwise, for all S, futureValueType(S) = Object?. |
| /// |
| /// @description Check that futureValueType(void) = void |
| /// |
| /// @author sgrekhov@unipro.ru |
| |
| // Requirements=nnbd-strong |
| void g() {} |
| |
| void foo() async { |
| return new Future<void>.value(); |
| } |
| |
| main() { |
| foo(); |
| } |