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>
23 lines
514 B
Dart
23 lines
514 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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import "package:expect/expect.dart";
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class A {}
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class B extends A {}
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Iterable<B> f(Iterable<A> a) sync* {
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yield* a;
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}
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void main() {
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B b = new B();
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for (var x in f(<B>[b])) {} // No error
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var iterator = f(<A>[b]).iterator;
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Expect.throwsTypeError(() {
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iterator.moveNext();
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});
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}
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