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<base href="https://bugs.webkit.org/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [JSC] Unary + changes evaluation order"
href="https://bugs.webkit.org/show_bug.cgi?id=159968">159968</a>
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<th>Summary</th>
<td>[JSC] Unary + changes evaluation order
</td>
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<th>Classification</th>
<td>Unclassified
</td>
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<th>Product</th>
<td>WebKit
</td>
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<th>Version</th>
<td>WebKit Nightly Build
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<th>Hardware</th>
<td>Unspecified
</td>
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<th>OS</th>
<td>Unspecified
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>Normal
</td>
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<th>Priority</th>
<td>P2
</td>
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<th>Component</th>
<td>JavaScriptCore
</td>
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<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
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<th>Reporter</th>
<td>utatane.tea@gmail.com
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<pre>Currently, we just strip the unary + in makeXXXNode. But unary + can change the evaluation order since it performs ToNumber.
Modified tests derived from the Rick Waldron's one.
let capture = [];
let leftValue = { valueOf() { capture.push("leftValue"); return 3; }};
let rightValue = { valueOf() { capture.push("rightValue"); return 2; }};
(capture.push("left"), leftValue) ${token} +(capture.push("right"), rightValue);
// ^
// Changes the order
// Expected per operator evaluation order: "left", "right", "rightValue", "leftValue"
shouldBe(capture[0], "left");
shouldBe(capture[1], "right");
shouldBe(capture[2], "rightValue");
shouldBe(capture[3], "leftValue");</pre>
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