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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - type_traits cannot be used with gcc for -std=c++ < 11"
href="http://llvm.org/bugs/show_bug.cgi?id=20484">20484</a>
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<th>Summary</th>
<td>type_traits cannot be used with gcc for -std=c++ < 11
</td>
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<th>Product</th>
<td>libc++
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>PC
</td>
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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>All Bugs
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>danalbert@google.com
</td>
</tr>
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu, mclow.lists@gmail.com
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<th>Classification</th>
<td>Unclassified
</td>
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<p>
<div>
<pre>Including the type_traits header from g++ currently fails if not using c++11:
error: default template arguments may not be used in function templates
without -std=c++11 or -std=gnu++11
This is a C++11 header, so it should be a non-issue, but type_traits gets
included in many other headers, including things as simple as cmath.
The patch that introduced the default template argument in question was r123163
(<a href="https://github.com/llvm-mirror/libcxx/commit/2b44e3dd49136179c49a81f34f14ce31005c6792">https://github.com/llvm-mirror/libcxx/commit/2b44e3dd49136179c49a81f34f14ce31005c6792</a>).</pre>
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