Robert Nystrom
2eed35d650
Change-Id: I5f9aa5799cf88a320675debb919011f8a19b6faa Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/141742 Auto-Submit: Bob Nystrom <rnystrom@google.com> Reviewed-by: Lasse R.H. Nielsen <lrn@google.com> Commit-Queue: Bob Nystrom <rnystrom@google.com>
31 lines
794 B
Dart
31 lines
794 B
Dart
// Copyright (c) 2016, 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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import "package:expect/expect.dart";
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// Regression test for recursive inheritance patterns
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abstract class Comparable<T> {
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int compareTo(T a);
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}
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class MI<T extends MI<T>> {}
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class _MI extends MI<_MI> {}
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class PMI<T extends Comparable<T>> extends MI<PMI<T>> {}
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class _PMI extends PMI<_PMI> implements Comparable<_PMI> {
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int compareTo(_PMI other) => throw new UnimplementedError();
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}
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void main() {
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MI a = new MI<_MI>();
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PMI b = new PMI<_PMI>();
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a = b;
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Expect.isTrue(a is MI);
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Expect.isTrue(b is PMI);
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Expect.isTrue(b is MI);
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Expect.isTrue(b is MI<PMI>);
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}
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