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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - std::tuple constructor template auto deduction fails with a class F that has a ctor F(std::tuple<F>)"
href="https://bugs.llvm.org/show_bug.cgi?id=47449">47449</a>
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<th>Summary</th>
<td>std::tuple constructor template auto deduction fails with a class F that has a ctor F(std::tuple<F>)
</td>
</tr>
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<th>Product</th>
<td>libc++
</td>
</tr>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Windows NT
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>All Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>kirshamir@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org, mclow.lists@gmail.com
</td>
</tr></table>
<p>
<div>
<pre>struct F {
F() {}
F(const std::tuple<F>&) {}
};
int main() {
// ok: std::tuple<F>
std::tuple t1{F{}};
// ok: std::tuple<std::tuple<F>>
std::tuple<std::tuple<F>> t2 = std::make_tuple(t1);
// should be std::tuple<std::tuple<F>> but fails with stdlibc++
std::tuple t3 = std::make_tuple(t1);
}
// Code in compiler explorer: <a href="https://godbolt.org/z/qGrcav">https://godbolt.org/z/qGrcav</a></pre>
</div>
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