| /* |
| * 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 In an unmigrated library, override checking is done using legacy |
| * types. This means that an unmigrated library can bring together otherwise |
| * incompatible methods. When choosing the most specific signature during |
| * interface computation, all nullability and requiredness annotations are |
| * ignored, and the [Never] type is treated as [Null]. |
| * |
| * @description Check that if generic legacy class extends generic opted-in |
| * class, legacy type parameter can be [Null] if parent class type parameter is |
| * nullable [FutureOr]. |
| * |
| * @Issue 39666. |
| * @author iarkh@unipro.ru |
| */ |
| // SharedOptions=--enable-experiment=non-nullable |
| // @dart=2.6 |
| |
| import "dart:async"; |
| import "../../Utils/expect.dart"; |
| import "override_checking_opted_in_futureor_lib.dart"; |
| |
| class A1<T extends Null> extends OPTED_FUTUREOR<T> { dynamic getParamType() => typeOf<T>(); } |
| class A2<T extends Null> extends OPTED_FUTUREOR_FUTUREOR<T> { dynamic getParamType() => typeOf<T>(); } |
| |
| main() { |
| Expect.equals( Null, A1().getParamType()); |
| Expect.equals( Null, A1<Null>().getParamType()); |
| |
| Expect.equals( Null, A2().getParamType()); |
| Expect.equals( Null, A2<Null>().getParamType()); |
| } |