| /* |
| * 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: |
| * Right Object: if T1 is Object then: |
| * - if T0 is an unpromoted type variable with bound B then T0 <: T1 iff |
| * B <: Object |
| * - if T0 is a promoted type variable X & S then T0 <: T1 iff S <: Object |
| * - if T0 is FutureOr<S> for some S, then T0 <: T1 iff S <: Object. |
| * - if T0 is S* for any S, then T0 <: T1 iff S <: T1 |
| * - if T0 is Null, dynamic, void, or S? for any S, then the subtyping does not |
| * hold (per above, the result of the subtyping query is false). |
| * - Otherwise T0 <: T1 is true. |
| * @description Check that if T0 is an unpromoted type variable with bound B |
| * but B is not subtype of Object then T0 is not subtype of T1 |
| * @author sgrekhov@unipro.ru |
| */ |
| // SharedOptions=--enable-experiment=non-nullable |
| class B {} |
| class T0 extends B {} |
| |
| T0 t0Instance = new T0(); |
| Object t1Instance = new Object(); |
| |
| //# @T0 = T0 |
| //# @T1 = Object |
| |
| //# <!-- Global variables & classes definition --> |
| |
| test<T extends B?>(T t0Instance) { |
| //# <!-- Test body --> |
| } |
| |
| main() { |
| test<T0>(t0Instance); |
| } |
