| /* |
| * Copyright (c) 2019, 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 a promoted type variable X & S and |
| * S <: Object then T0 is subtype of Object even is X is not subtype of Object |
| * @author sgrekhov@unipro.ru |
| */ |
| /** |
| * @description Check that if type T0 is a subtype of a type T1, then instance |
| * of T0 can be be used as a return value of type T1 |
| * @author sgrekhov@unipro.ru |
| */ |
| /* |
| * This test is generated from right_object_A03.dart and |
| * return_value_x01.dart. |
| * Don't modify it. If you want to change this file, change one of the files |
| * above and then run generator.dart to regenerate the tests. |
| */ |
| |
| |
| // SharedOptions=--enable-experiment=non-nullable |
| import "../../utils/legacy_lib.dart"; |
| class S extends X {} |
| |
| S t0Instance = new S(); |
| Object t1Instance = new Object(); |
| |
| |
| |
| |
| |
| Object returnValueFunc() => t0Instance; |
| |
| class ReturnValueTest { |
| static Object staticTestMethod() => t0Instance; |
| |
| Object testMethod() => t0Instance; |
| |
| Object get testGetter => t0Instance; |
| } |
| |
| |
| |
| test<T>(T t0Instance) { |
| if (T is S) { |
| |
| Object returnValueLocalFunc() => t0Instance; |
| |
| returnValueFunc(); |
| returnValueLocalFunc(); |
| |
| ReturnValueTest.staticTestMethod(); |
| |
| new ReturnValueTest().testMethod(); |
| new ReturnValueTest().testGetter; |
| |
| |
| } |
| } |
| |
| main() { |
| test<X>(t0Instance); |
| } |