| /* |
| * Copyright (c) 2019, 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 For the purposes of errors and warnings, the null aware operators |
| * ?., ?.., and ?.[] are checked as if the receiver of the operator had |
| * non-nullable type. More specifically, if the type of the receiver of a null |
| * aware operator is T, then the operator is checked as if the receiver had type |
| * NonNull(T). |
| * |
| * @description Check that it is no error if receiver has nullable type. Test |
| * type alias |
| * @author sgrekhov@unipro.ru |
| */ |
| // SharedOptions=--enable-experiment=non-nullable,nonfunction-type-aliases |
| class A { |
| void test() {} |
| int operator[](int index) => 0; |
| } |
| |
| typedef AAlias = A?; |
| |
| main() { |
| AAlias a = null; |
| a?.test(); |
| a ?.. test(); |
| a?.[0]; |
| } |
