<html>
<head>
<base href="https://llvm.org/bugs/" />
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Relational operators for std::experimental::optional<T>"
href="https://llvm.org/bugs/show_bug.cgi?id=31168">31168</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Relational operators for std::experimental::optional<T>
</td>
</tr>
<tr>
<th>Product</th>
<td>libc++
</td>
</tr>
<tr>
<th>Version</th>
<td>3.9
</td>
</tr>
<tr>
<th>Hardware</th>
<td>All
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>All Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>arthur.j.odwyer@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org, mclow.lists@gmail.com
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=17652" name="attach_17652" title="Patch for optional<T> relational operators">attachment 17652</a> <a href="attachment.cgi?id=17652&action=edit" title="Patch for optional<T> relational operators">[details]</a></span>
Patch for optional<T> relational operators
N4606 requires that optional<T>::operator> be implemented in terms of
T::operator>, but right now libc++'s optional<T>::operator> is (incorrectly)
implemented in terms of T::operator< with the operands flipped.
This is important for types T that have only incomplete orderings: (x < y) may
not imply (y > x).
I've attached a patch that I think suffices to fix the issue, but I don't have
commit privileges.</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>