| // 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. |
| |
| /// @assertion We say that a type T0 is a subtype of a type T1 (written T0 <: T1) |
| /// when: |
| /// Left Promoted Variable: T0 is a promoted type variable X0 & S0 |
| /// and S0 <: T1 |
| /// @description Check that if type T0 is a promoted type variable X0 & S0 and S0 |
| /// is subtype of T1 then T0 is a subtype of T1. |
| /// @author sgrekhov@unipro.ru |
| |
| class T1 { |
| const T1(); |
| } |
| class X0 {} |
| class S0 extends X0 implements T1 {} |
| |
| //# @T0 = X0 |
| //# @T1 = T1 |
| |
| S0 t0Instance = new S0(); |
| T1 t1Instance = new T1(); |
| |
| const t1Default = const T1(); |
| |
| //# <!-- Global variables & classes definition --> |
| |
| main() { |
| X0 t0Instance = new S0(); |
| |
| if (t0Instance is S0) { |
| //# <!-- Test body --> |
| } |
| } |