| /* |
| * 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 FutureOr: T0 is FutureOr<S0> |
| * and Future<S0> <: T1 |
| * and S0 <: T1 |
| * @description Check that if a type T0 is FutureOr<S0> and S0 is a subtype of |
| * T1 but Future<S0> is not a subtype of T1 , then a type T0 is not a subtype of |
| * a type T1. |
| * @author sgrekhov@unipro.ru |
| */ |
| /** |
| * @description Check that if type T0 not a subtype of a type T1, then instance |
| * of T0 cannot be be used as a return value of type T1. Return value is tested. |
| * @compile-error |
| * @author sgrekhov@unipro.ru |
| * @author ngl@unipro.ru |
| */ |
| /* |
| * This test is generated from left_FutureOr_fail_A02.dart and |
| * return_value_fail_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. |
| */ |
| |
| |
| |
| import "dart:async"; |
| |
| class T1 {} |
| class S0 extends T1 {} |
| |
| FutureOr<S0> t0Instance = Future<S0>.value(new S0()); // Future<S0> is not a subtype of T1 |
| T1 t1Instance = new T1(); |
| |
| |
| |
| |
| T1 returnValueFunc() => t0Instance; //# 01: compile-time error |
| |
| class ReturnValueTest { |
| static T1 staticTestMethod() => t0Instance; //# 03: compile-time error |
| T1 testMethod() => t0Instance; //# 04: compile-time error |
| T1 get testGetter => t0Instance; //# 05: compile-time error |
| } |
| |
| main() { |
| returnValueFunc(); //# 01: compile-time error |
| |
| T1 returnValueLocalFunc() => t0Instance; //# 02: compile-time error |
| returnValueLocalFunc(); //# 02: compile-time error |
| |
| ReturnValueTest.staticTestMethod(); //# 03: compile-time error |
| new ReturnValueTest().testMethod(); //# 04: compile-time error |
| new ReturnValueTest().testGetter; //# 05: compile-time error |
| } |