| // 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 a migrated library, override checking must check that an |
| /// override is consistent with all overridden methods from other migrated |
| /// libraries in the super-interface chain, since a legacy library is permitted |
| /// to override otherwise incompatible signatures for a method. |
| /// |
| /// @description Check that if generic opted-in class implements generic legacy |
| /// class with [FutureOr] type parameter, child opted-in class type parameter can |
| /// extend [Null]. |
| /// |
| /// @Issue 39666 |
| /// |
| /// @author iarkh@unipro.ru |
| |
| // Requirements=nnbd-weak |
| import "dart:async"; |
| import "../../../../Utils/expect.dart"; |
| import "override_checking_A02_opted_out_futureor_lib.dart"; |
| |
| class OptedFutureOr<T extends Null> implements LEGACY_CLASS_FUTUREOR<T> { |
| dynamic getParamType() => T; |
| } |
| |
| class OptedFutureOrInt<T extends Null> implements LEGACY_CLASS_FUTUREORINT<T> { |
| dynamic getParamType() => T; |
| } |
| |
| class OptedFutureOrFunction<T extends Null> implements LEGACY_CLASS_FUTUREORFUNCTION<T> { |
| dynamic getParamType() => T; |
| } |
| |
| class OptedFutureOrFutureOr<T extends Null> implements LEGACY_CLASS_FUTUREORFUTUREOR<T> { |
| dynamic getParamType() => T; |
| } |
| |
| main() { |
| Expect.equals(typeOf<Null>(), OptedFutureOr().getParamType()); |
| Expect.equals(typeOf<Null>(), OptedFutureOr<Null>().getParamType()); |
| |
| Expect.equals(typeOf<Null>(), OptedFutureOrInt().getParamType()); |
| Expect.equals(typeOf<Null>(), OptedFutureOrInt<Null>().getParamType()); |
| |
| Expect.equals(typeOf<Null>(), OptedFutureOrFunction().getParamType()); |
| Expect.equals(typeOf<Null>(), OptedFutureOrFunction<Null>().getParamType()); |
| |
| Expect.equals(typeOf<Null>(), OptedFutureOrFutureOr().getParamType()); |
| Expect.equals(typeOf<Null>(), OptedFutureOrFutureOr<Null>().getParamType()); |
| } |