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67539c2faf
Change-Id: I318742cd4303d70c0625c9efd98bb01087aa5de4 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/150466 Commit-Queue: Bob Nystrom <rnystrom@google.com> Reviewed-by: Erik Ernst <eernst@google.com>
29 lines
553 B
Dart
29 lines
553 B
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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abstract class F<T> {
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T foo(T t);
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}
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class B<T extends F<T>> {}
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class C<T extends F<C<T>>> {}
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class D extends B<D> implements F<D> {
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D foo(D x) => x;
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}
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class E extends C<E> implements F<C<E>> {
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C<E> foo(C<E> x) => x;
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}
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main() {
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D fd = D();
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var d = fd.foo(fd);
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print(d);
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E fe = E();
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var e = fe.foo(fe);
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print(e);
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}
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