<html>
<head>
<base href="https://bugs.llvm.org/">
</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 - Different interpretation between GCC and clang in resolution of DR1579"
href="https://bugs.llvm.org/show_bug.cgi?id=44932">44932</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Different interpretation between GCC and clang in resolution of DR1579
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</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>C++
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>harald@gigawatt.nl
</td>
</tr>
<tr>
<th>CC</th>
<td>blitzrakete@gmail.com, dgregor@apple.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
</td>
</tr></table>
<p>
<div>
<pre>Hi,
struct A { A(); A(const A &); A(A &&); };
struct B { B(A); };
B f() { A a; return a; }
GCC will use A's move constructor, clang will use A's copy constructor. The
literal text of the standard leaves some room for interpretation, IMO, as it
only says the treating of a as an rvalue applies to the selection of B's
constructor, and GCC and clang agree on which of B's constructors gets called,
but I would think that GCC's behaviour is probably what's intended.
Seen in clang 9, but appears to still apply to current trunk.</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>