| /* |
| * 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 Promoted Variable: if T1 is a promoted type variable X1 & S1 then: |
| * - T0 <: T1 iff T0 <: X1 and T0 <: S1 |
| * @description Check that if type T1 is a promoted type variables X1 & S1 and |
| * T0 <: X1 and T0 <: S1 then T0 is a subtype of T1. |
| * @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_promoted_variable_A01.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. |
| */ |
| |
| |
| class X1 { |
| const X1(); |
| } |
| class S1 extends X1 { |
| const S1(); |
| } |
| |
| class T0 extends S1 {} |
| |
| T0 t0Instance = new T0(); |
| X1 t1Instance = new S1(); |
| |
| const t1Default = const S1(); |
| |
| |
| |
| |
| S1 returnValueFunc() => t0Instance; |
| |
| class ReturnValueTest { |
| static S1 staticTestMethod() => t0Instance; |
| |
| S1 testMethod() => t0Instance; |
| |
| S1 get testGetter => t0Instance; |
| } |
| |
| |
| |
| main() { |
| X1 t1Instance = new S1(); |
| if (t1Instance is S1) { |
| |
| S1 returnValueLocalFunc() => t0Instance; |
| |
| returnValueFunc(); |
| returnValueLocalFunc(); |
| |
| ReturnValueTest.staticTestMethod(); |
| |
| new ReturnValueTest().testMethod(); |
| new ReturnValueTest().testGetter; |
| |
| |
| } |
| } |