Robert Nystrom
b4d17e9c07
Change-Id: I3ec18bb7e7cfb087a58d744d357bf004c0438ba9 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/147813 Commit-Queue: Bob Nystrom <rnystrom@google.com> Auto-Submit: Bob Nystrom <rnystrom@google.com> Reviewed-by: Erik Ernst <eernst@google.com>
42 lines
1.4 KiB
Dart
42 lines
1.4 KiB
Dart
// Copyright (c) 2017, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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// Test that generic methods with optional parameters are of correct type.
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library generic_methods_optional_parameters_test;
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import "package:expect/expect.dart";
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typedef FunObjObj = Object? Function<T>(Object?, [Object?]);
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typedef FunTypObj = Object? Function<T>(T, [Object?]);
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typedef FunObjTyp = Object? Function<T>(Object?, [T?]);
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typedef FunTypTyp = Object? Function<T>(T, [T?]);
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Object? funObjObj<T>(Object? x, [Object? y]) => x;
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Object? funTypObj<T>(T x, [Object? y]) => y;
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Object? funObjTyp<T>(Object? x, [T? y]) => x;
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Object? funTypTyp<T>(T x, [T? y]) => null;
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main() {
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Expect.isTrue(funObjObj is FunObjObj);
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Expect.isTrue(funObjObj is FunTypObj);
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Expect.isTrue(funObjObj is FunObjTyp);
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Expect.isTrue(funObjObj is FunTypTyp);
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Expect.isTrue(funTypObj is! FunObjObj);
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Expect.isTrue(funTypObj is FunTypObj);
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Expect.isTrue(funTypObj is! FunObjTyp);
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Expect.isTrue(funTypObj is FunTypTyp);
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Expect.isTrue(funObjTyp is! FunObjObj);
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Expect.isTrue(funObjTyp is! FunTypObj);
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Expect.isTrue(funObjTyp is FunObjTyp);
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Expect.isTrue(funObjTyp is FunTypTyp);
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Expect.isTrue(funTypTyp is! FunObjObj);
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Expect.isTrue(funTypTyp is! FunTypObj);
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Expect.isTrue(funTypTyp is! FunObjTyp);
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Expect.isTrue(funTypTyp is FunTypTyp);
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}
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