| // 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. |
| |
| // @dart = 2.9 |
| |
| /// @assertion We say that a type T0 is a subtype of a type T1 (written T0 <: T1) |
| /// when: |
| /// Left Null: T0 is Null. |
| /// @description Check that if type T0 is Null then T0 is a subtype of a type T1. |
| /// @author sgrekhov@unipro.ru |
| |
| |
| class T1 {} |
| |
| Null t0Instance = null; |
| T1 t1Instance = new T1(); |
| |
| //# @T0 = Null |
| //# @T1 = T1 |
