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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Clang incorrectly accepts non-type template parameter pack expansion of a parameter pack declared in the same template-parameter-list"
href="https://llvm.org/bugs/show_bug.cgi?id=24625">24625</a>
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<th>Summary</th>
<td>Clang incorrectly accepts non-type template parameter pack expansion of a parameter pack declared in the same template-parameter-list
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<th>Product</th>
<td>clang
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>PC
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<th>OS</th>
<td>Linux
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>C++
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>brunocodutra@gmail.com
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<th>CC</th>
<td>dgregor@apple.com, llvm-bugs@lists.llvm.org
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<th>Classification</th>
<td>Unclassified
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<p>
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<pre>The following is incorrectly accepted by clang (and GCC but not MSVC 14)
template<typename...>
struct foo;
template<typename... t, t... v>
struct foo<std::integral_constant<t, v>...>
{
using type = foo;
};
using bar = foo<std::integral_constant<int, -1>, std::true_type>::type;
[temp.param]/p15:
"A template parameter pack that is a pack expansion shall not expand a
parameter pack declared in the same template-parameter-list."</pre>
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