| /* |
| * 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 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 legacy class extends opted-in class, legacy method |
| * with optional named argument without default value can override method |
| * with [required] argument and accept [null] values. |
| * |
| * @author iarkh@unipro.ru |
| */ |
| // SharedOptions=--enable-experiment=non-nullable |
| // @dart=2.6 |
| |
| import "../../Utils/expect.dart"; |
| import "override_checking_A01_opted_in_lib.dart"; |
| |
| class A extends OPTED_REQUIRED_ARGS { |
| void test_required_nonnullable({int i}) { Expect.isNull(i); } |
| void test_required_nullable({int i}) { Expect.isNull(i); } |
| } |
| |
| main() { |
| A a = A(); |
| a.test_required_nonnullable(i: null); |
| a.test_required_nullable(i: null); |
| } |