| // 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. |
| |
| import 'dart:async'; |
| |
| /* `return exp;` where `exp` has static type `S` and the future value type of |
| * the function is `Tv` is an error if `S` is not assignable to `Tv` and |
| * `flatten(S)` is not a subtype of `Tv`. |
| */ |
| |
| Future<Future<String>> v = Future.value(Future<String>.value('')); |
| |
| Future<String> test1() async { |
| return v; |
| // ^ |
| // [analyzer] unspecified |
| // [cfe] A value of type 'Future<Future<String>>' can't be returned from an async function with return type 'Future<String>'. |
| } |
| |
| Future<String> Function() test2 = () async { |
| return v; |
| // ^ |
| // [analyzer] unspecified |
| // [cfe] A value of type 'Future<Future<String>>' can't be returned from an async function with return type 'Future<String>'. |
| }; |
| |
| void main() { |
| test1(); |
| test2(); |
| } |