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d4154ac6dc
Change-Id: Iad2963c7f9c184b089dc6d15aa4442f58d194bc2 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/151983 Reviewed-by: Nicholas Shahan <nshahan@google.com> Commit-Queue: Bob Nystrom <rnystrom@google.com> Auto-Submit: Bob Nystrom <rnystrom@google.com>
36 lines
1.2 KiB
Dart
36 lines
1.2 KiB
Dart
// Copyright (c) 2013, 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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// Tests self referencing types.
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import "package:expect/expect.dart";
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class Base<U, V> {
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get u => U;
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get v => V;
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}
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class Derived1<U, V>
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extends Base<Derived1<U, V>, Derived1<Derived2<V, U>, Derived2>> {}
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class Derived2<U, V>
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extends Base<Derived2<U, V>, Derived2<Derived1<V, U>, Derived1>> {}
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main() {
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var d = new Derived1<Derived1, Derived2>();
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Expect.equals(
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"Derived1<Derived1<dynamic, dynamic>, Derived2<dynamic, dynamic>>",
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d.u.toString());
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Expect.equals(
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"Derived1<Derived2<Derived2<dynamic, dynamic>, "
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"Derived1<dynamic, dynamic>>, Derived2<dynamic, dynamic>>",
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d.v.toString());
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Expect.isTrue(d is Derived1<Derived1, Derived2>);
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Expect.isFalse(d is Derived1<Derived1, Derived1>);
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Expect.isTrue(d is Base<Derived1<Derived1, Derived2>,
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Derived1<Derived2<Derived2, Derived1>, Derived2>>);
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Expect.isFalse(d is Base<Derived1<Derived1, Derived2>,
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Derived1<Derived2<Derived2, Derived2>, Derived2>>);
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}
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