| // Copyright (c) 2020, 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 We say that a type T0 is a subtype of a type T1 (written T0 <: T1) |
| /// when: |
| /// Right Legacy T1 is S1* then: |
| /// - T0 <: T1 iff T0 <: S1? |
| /// @description Check that if type T1 is S1* and T0 <: S1? then T0 is subtype of |
| /// T1. |
| /// @author sgrekhov@unipro.ru |
| |
| // Requirements=nnbd-weak |
| import "../../utils/legacy_lib.dart"; |
| |
| class S1 { |
| const S1(); |
| } |
| class T0 extends S1 {} |
| |
| T0? t0Instance = new T0(); |
| var t1Instance = getLegacyType<S1>(new S1()); |
| |
| main() { |
| t1Instance = t0Instance; |
| } |
