| /* |
| * 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 The grammar of types is extended to allow any type to be suffixed |
| * with a ? (e.g. int?) indicating the nullable version of that type. |
| * |
| * @description Check that any type can be suffixed with a ? indicating the |
| * nullable version of that type. Test top-level types |
| * @author sgrekhov@unipro.ru |
| * @issue 40374 |
| * @issue 39896 |
| */ |
| // Requirements=nnbd-weak |
| dynamic? foo(dynamic? d) => d; |
| |
| Null? test(Null? n) => n; |
| |
| main() { |
| dynamic? d = null; |
| d = foo(d); |
| |
| Null? n = null; |
| n = test(n); |
| } |
