Robert Nystrom
fc1b1ecc71
Change-Id: Idbcc965a27e9ffeedf5e0a1068b019de4193070f Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/127745 Commit-Queue: Bob Nystrom <rnystrom@google.com> Reviewed-by: Alexander Thomas <athom@google.com>
27 lines
615 B
Dart
27 lines
615 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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class A<T> {
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bool foo(T x) => true;
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}
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class B extends Object with A<B>, C<B> {}
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// Tests #31290
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class C<T> {}
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main() {
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var b = new B();
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Expect.isTrue(b is B);
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Expect.isTrue(b is A);
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Expect.isTrue(b is C);
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// Verify that runtime checking enforces A<B> instead of A
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dynamic d = b;
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Expect.isTrue(d.foo(b));
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Expect.throws(() => d.foo(42));
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}
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