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<base href="https://llvm.org/bugs/" />
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<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW " title="NEW --- - bad sort order for candidates" href="https://urldefense.proofpoint.com/v2/url?u=https-3A__llvm.org_bugs_show-5Fbug.cgi-3Fid-3D24257&d=AwMBaQ&c=8hUWFZcy2Z-Za5rBPlktOQ&r=pF93YEPyB-J_PERP4DUZOJDzFVX5ZQ57vQk33wu0vio&m=m2rSELEpnHQgxkg9sEGkhZC5an23dOTC4SLWcOb8T-0&s=vX0_pvUtBLOLZmFbePMzPlBdPAKdcQbA3MvWfZb4iiA&e=">24257</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>bad sort order for candidates
</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>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>C++
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>nlewycky@google.com
</td>
</tr>
<tr>
<th>CC</th>
<td>dgregor@apple.com, llvmbugs@cs.uiuc.edu
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>$ cat b16776752-1.cc
struct Y {};
struct X {
X();
X(const X&) = delete;
X(const X&&) = delete;
X(Y&);
};
void test() {
const Y y{};
X x2(y);
}
$ clang b16776752-1.cc -std=c++14
b16776752-1.cc:12:5: error: no matching constructor for initialization of 'X'
X x2(y);
^ ~
b16776752-1.cc:5:3: note: candidate constructor not viable: no known conversion
from 'const Y' to 'const X' for 1st argument
X(const X&) = delete;
^
b16776752-1.cc:6:3: note: candidate constructor not viable: no known conversion
from 'const Y' to 'const X' for 1st argument
X(const X&&) = delete;
^
b16776752-1.cc:7:3: note: candidate constructor not viable: 1st argument
('const Y') would lose const qualifier
X(Y&);
^
b16776752-1.cc:4:3: note: candidate constructor not viable: requires 0
arguments, but 1 was provided
X();
^
1 error generated.
The two constructors are both non-viable and deleted. The X(Y&) ctor is
non-viable only by a const qualifier, so it should sort ahead of the others.
The deleted ctors should probably sort last.</pre>
</div>
</p>
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