| // 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. |
| |
| import 'dart:async'; |
| |
| /* `return exp;` where `exp` has static type `S` is an error if the future |
| * value type of the function is neither `void` nor `dynamic`, |
| * and `flatten(S)` is `void` or `void*`. |
| */ |
| |
| Future<void> v = Future.value("Hello"); |
| |
| FutureOr<Null> test1() async { |
| return v; |
| // ^ |
| // [analyzer] unspecified |
| // [cfe] A value of type 'Future<void>' can't be returned from an async function with return type 'FutureOr<Null>'. |
| } |
| |
| // Inferred return type of function literal is `Future<Null>`. |
| FutureOr<Null> Function() test2 = () async { |
| return v; |
| // ^ |
| // [analyzer] unspecified |
| // [cfe] A value of type 'Future<void>' can't be returned from an async function with return type 'Future<Null>'. |
| }; |
| |
| void main() { |
| test1(); |
| test2(); |
| } |