Johnni Winther
1eda15854d
Experiments that have not be enabled by default should only be allowed in the current version of the sdk. Closes #45460 Change-Id: I159f390ac85fe37943920717ce11a4c817d5b4a9 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/193480 Commit-Queue: Johnni Winther <johnniwinther@google.com> Reviewed-by: Dmitry Stefantsov <dmitryas@google.com>
23 lines
686 B
Dart
23 lines
686 B
Dart
// Copyright (c) 2019, 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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class Covariant<out T> {}
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class Contravariant<in T> {}
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class Invariant<inout T> {}
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void covariantListInfer<T>(Covariant<List<T>> x) {}
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void contravariantListInfer<T>(Contravariant<List<T>> x) {}
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void invariantListInfer<T>(Invariant<List<T>> x) {}
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main() {
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var cov = new Covariant();
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covariantListInfer(Covariant());
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var contra = new Contravariant();
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contravariantListInfer(Contravariant());
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var inv = new Invariant();
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invariantListInfer(Invariant());
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}
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