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>
53 lines
1.1 KiB
Dart
53 lines
1.1 KiB
Dart
// Copyright (c) 2013, 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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// dart2js regression test for issue 8781.
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import "package:expect/expect.dart";
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class N {
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var outgoing;
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var incoming;
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N(this.outgoing, this.incoming);
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}
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class A {
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int offset = 0;
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var list;
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var node;
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A(node)
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: node = node,
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list = node.outgoing;
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next() {
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// dart2js used to update [offset] twice: once in the optimized
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// version, which would bailout to the non-optimized version
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// because [list] is not an Array, and once in the non-optimized
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// version.
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var edge = list[offset++];
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if (list == node.outgoing) {
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list = node.incoming;
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offset = 0;
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} else
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list = null;
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return edge;
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}
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}
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main() {
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var o = new A(new N(confuse([1]), confuse([2])));
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for (var i = 1; i <= 2; i++) Expect.equals(i, o.next());
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Expect.equals(null, o.list);
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}
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// Use confuse to defeat type inferencing.
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@pragma('dart2js:noInline')
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@pragma('dart2js:assumeDynamic')
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confuse(x) {
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return x;
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}
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