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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - struct initialization fails in recursive case"
href="https://bugs.llvm.org/show_bug.cgi?id=47451">47451</a>
</td>
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<th>Summary</th>
<td>struct initialization fails in recursive case
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
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<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Windows NT
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>-New Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>kirshamir@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk
</td>
</tr></table>
<p>
<div>
<pre>template<std::size_t INDEX, typename... Ts>
struct A;
template<std::size_t INDEX, typename T>
struct A<INDEX, T> {
T t;
// problem "resolves" if we add this ctor
// template<typename U>
// A(U&& u): t{u} {}
};
template<std::size_t INDEX, typename T, typename... Ts>
struct A<INDEX, T, Ts...>: A<INDEX+1, Ts...>, A<INDEX, T> {
template<typename U, typename... Us>
A(U&& u, Us&&... us): A<INDEX+1, Ts...>(std::forward<Us>(us)...), A<INDEX,
T>{std::forward<U>(u)} {}
};
int main() {
A<0,int> a1{3}; // ok
A<0,int,int> a2{3, 3}; // fails
}
// code in compiler explorer: <a href="https://godbolt.org/z/K8afeK">https://godbolt.org/z/K8afeK</a></pre>
</div>
</p>
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