| /* |
| * 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 opted-in class implements two classes (one is |
| * legacy), child migrated method can have [Never] return value. |
| * |
| * @author iarkh@unipro.ru |
| */ |
| // SharedOptions=--enable-experiment=non-nullable |
| // Requirements=nnbd-strong |
| import "dart:async"; |
| import "override_checking_A02_legacy_lib.dart"; |
| import "../../Utils/expect.dart"; |
| |
| abstract class AA { |
| int? getInt(); |
| Object? getObject(); |
| dynamic getDynamic(); |
| Function? getFunction(); |
| Null getNull(); |
| FutureOr getFutureOr(); |
| FutureOr<int>? getFutureOrInt(); |
| FutureOr<Function>? getFutureOrFunction(); |
| } |
| |
| class A implements AA, LEGACY_RETURN { |
| Never getInt() => throw "It's impossible!"; |
| Never getObject() => throw "It's impossible!"; |
| Never getDynamic() => throw "It's impossible!"; |
| Never getFunction() => throw "It's impossible!"; |
| Never getNull() => throw "It's impossible!"; |
| Never getFutureOr() => throw "It's impossible!"; |
| Never getFutureOrInt() => throw "It's impossible!"; |
| Never getFutureOrFunction() => throw "It's impossible!"; |
| } |
| |
| main() { |
| A a = A(); |
| |
| Expect.throws(() { a.getInt(); }); |
| Expect.throws(() { a.getObject(); }); |
| Expect.throws(() { a.getDynamic(); }); |
| Expect.throws(() { a.getFunction(); }); |
| Expect.throws(() { a.getNull(); }); |
| Expect.throws(() { a.getFutureOr(); }); |
| Expect.throws(() { a.getFutureOrInt(); }); |
| Expect.throws(() { a.getFutureOrFunction(); }); |
| } |