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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Clang can not compile typename with non-type in using declaration"
href="https://bugs.llvm.org/show_bug.cgi?id=46214">46214</a>
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<th>Summary</th>
<td>Clang can not compile typename with non-type in using declaration
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>All
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
</td>
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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>haoxintu@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>blitzrakete@gmail.com, dgregor@apple.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
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<pre>cat test.cc
namespace g_namespace {
int var = 9;
typedef int C;
}
int main() {
using typename g_namespace::var; //fails
using typename g_namespace::C; //ok
return 0;
}
$clang++-trunk test.cc
<source>:6:31: error: 'typename' keyword used on a non-type
using typename g_namespace::var; //fails
^
<source>:2:9: note: target of using declaration
int var = 9;
^
1 error generated.
Execution build compiler returned: 1
Reproduced in godbolt: <a href="https://godbolt.org/z/MgR7GF">https://godbolt.org/z/MgR7GF</a>
In GCC, test.cc is compiled well.
I am wondering that is it Clang still not support this feature that
using-declaration with a non-type typename or this is a bug in clang?</pre>
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