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<base href="http://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - clang erroneously enforcing alias template parameter kind"
href="http://llvm.org/bugs/show_bug.cgi?id=19373">19373</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>clang erroneously enforcing alias template parameter kind
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<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>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>C++11
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>eric@boostpro.com
</td>
</tr>
<tr>
<th>CC</th>
<td>dgregor@apple.com, llvmbugs@cs.uiuc.edu
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Gcc 4.8.2 accepts the following code. I think it's legal, but I'm far from
certain.
///////////////////////////////////////
template<typename T, typename...Us>
using X = T;
template<template<typename...> class T>
struct S
{
template<typename...Us>
using X = T<Us...>;
};
int main()
{
S<X>::X<int, char *> i = 0;
}
///////////////////////////////////////
Result:
test.cpp:8:17: error: pack expansion used as argument for non-pack parameter of
alias template
using X = T<Us...>;
^~~~~
test.cpp:13:5: note: in instantiation of template class 'S<X>' requested here
S<X>::X<int, char *> i = 0;
^
test.cpp:1:19: note: template parameter is declared here
template<typename T, typename...Us>
^</pre>
</div>
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