| // Copyright (c) 2011, 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 S be the runtime type of o. |
| /// • If the body of f is marked async it is a compile type error if o is not |
| /// null and Future<S> is not a subtype of the actual return type of f. |
| /// • Otherwise, it is a compile type error if o is not null and the runtime |
| /// type of o is not a subtype of the actual return type of f. |
| /// |
| /// @description Checks that it's not an error in any mode if o is null. |
| /// |
| /// @author kaigorodov |
| |
| |
| var r = null; |
| |
| int? foo() { return r; } |
| |
| main() { |
| foo(); |
| } |