blob: d81c148a391cbaa8383fa8fc8f7d5549f3c48bfd [file] [log] [blame]
// Copyright (c) 2017, 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.
// Test that generic methods with optional parameters are of correct type.
library generic_methods_optional_parameters_test;
import "package:expect/expect.dart";
typedef FunObjObj = Object? Function<T>(Object?, [Object?]);
typedef FunTypObj = Object? Function<T>(T, [Object?]);
typedef FunObjTyp = Object? Function<T>(Object?, [T?]);
typedef FunTypTyp = Object? Function<T>(T, [T?]);
Object? funObjObj<T>(Object? x, [Object? y]) => x;
Object? funTypObj<T>(T x, [Object? y]) => y;
Object? funObjTyp<T>(Object? x, [T? y]) => x;
Object? funTypTyp<T>(T x, [T? y]) => null;
main() {
Expect.isTrue(funObjObj is FunObjObj);
Expect.isTrue(funObjObj is FunTypObj);
Expect.isTrue(funObjObj is FunObjTyp);
Expect.isTrue(funObjObj is FunTypTyp);
Expect.isTrue(funTypObj is! FunObjObj);
Expect.isTrue(funTypObj is FunTypObj);
Expect.isTrue(funTypObj is! FunObjTyp);
Expect.isTrue(funTypObj is FunTypTyp);
Expect.isTrue(funObjTyp is! FunObjObj);
Expect.isTrue(funObjTyp is! FunTypObj);
Expect.isTrue(funObjTyp is FunObjTyp);
Expect.isTrue(funObjTyp is FunTypTyp);
Expect.isTrue(funTypTyp is! FunObjObj);
Expect.isTrue(funTypTyp is! FunTypObj);
Expect.isTrue(funTypTyp is! FunObjTyp);
Expect.isTrue(funTypTyp is FunTypTyp);