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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - templetized operator<< isn't matched in a namespace"
href="https://bugs.llvm.org/show_bug.cgi?id=47333">47333</a>
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<th>Summary</th>
<td>templetized operator<< isn't matched in a namespace
</td>
</tr>
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<th>Product</th>
<td>clang
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>FreeBSD
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>C++17
</td>
</tr>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>yuri@tsoft.com
</td>
</tr>
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<th>CC</th>
<td>blitzrakete@gmail.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
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<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=23900" name="attach_23900" title="testcase-templetized-operator-in-namespace.cpp">attachment 23900</a> <a href="attachment.cgi?id=23900&action=edit" title="testcase-templetized-operator-in-namespace.cpp">[details]</a></span>
testcase-templetized-operator-in-namespace.cpp
The attached testcase testcase-templetized-operator-in-namespace.cpp fails to
compile:
<span class="quote">> testcase-templetized-operator-in-namespace.cpp:38:22: error: invalid operands to binary expression ('basic_ostream<char, std::__1::char_traits<char>>' and 'std::vector<int>')
> std::cout << " v=" << ee << std::endl;
> ~~~~~~~~~~~~~~~~~~ ^ ~~</span >
The locally defined template "template<typename T> std::ostream&
operator<<(std::ostream &os, std::vector<T> &v)" isn't matched in a class
method.
However, removing the namespace X (flattening it), or removing the unrelated
"std::ostream& operator<<(std::ostream &os, E e)" make this code to compile.
The template should match regardless of the code being in a namespace, or
presence of operator<< for other types.
Observed on llvm-devel-12.0.d20200811 in FreeBSD 12.1</pre>
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