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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Issue using std::tuple_cat to construct a single-element tuple containing a type with a templated constructor"
href="https://bugs.llvm.org/show_bug.cgi?id=41689">41689</a>
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<th>Summary</th>
<td>Issue using std::tuple_cat to construct a single-element tuple containing a type with a templated constructor
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<th>Product</th>
<td>libc++
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<th>Version</th>
<td>8.0
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>normal
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>All Bugs
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>mikezackles@gmail.com
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org, mclow.lists@gmail.com
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<pre>Something like this fails to compile with libc++ using c++17:
auto foo() -> std::tuple<Thing<int>> {
return std::tuple_cat(std::tuple(Thing<int>(5)));
}
error: no viable conversion from 'std::__1::tuple<Thing<int> &&>' to 'int'
Here is a live demo: <a href="https://godbolt.org/z/CSMdD2">https://godbolt.org/z/CSMdD2</a>
Many thanks, and my apologies if I'm mistaken.</pre>
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