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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - bogus unused variable warning for C++1y variable templates"
href="http://llvm.org/bugs/show_bug.cgi?id=19305">19305</a>
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<th>Summary</th>
<td>bogus unused variable warning for C++1y variable templates
</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>normal
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>C++1y
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>kremenek@apple.com
</td>
</tr>
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
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<p>
<div>
<pre>This looks like a bogus -Wunused-const-variable warning:
$ cat test.cpp
#include <iostream>
template<class T>
constexpr const T pi(3.141592654);
int main(int argc, const char * argv[])
{
std::cout << pi<float> << std::endl;
return 0;
}
$ clang -std=c++1y c.cpp -Wunused-const-variable -fsyntax-only
test.cpp:4:19: warning: unused variable 'pi' [-Wunused-const-variable]
constexpr const T pi(3.141592654);
^
1 warning generated.</pre>
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