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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Template argument-dependent lookup fails to find a function in unnamed namespace"
href="https://bugs.llvm.org/show_bug.cgi?id=35496">35496</a>
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<th>Summary</th>
<td>Template argument-dependent lookup fails to find a function in unnamed namespace
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>5.0
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
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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
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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>trupwszafie@o2.pl
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<th>CC</th>
<td>dgregor@apple.com, llvm-bugs@lists.llvm.org
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<pre>Created <span class=""><a href="attachment.cgi?id=19507" name="attach_19507" title="File reproducing the issue.">attachment 19507</a> <a href="attachment.cgi?id=19507&action=edit" title="File reproducing the issue.">[details]</a></span>
File reproducing the issue.
Template function fails to find operator>> overloading, when the operator>>
function is defined in unnamed namespace. Error message:
c1.cpp:16:9: error: call to function 'operator>>' that is neither visible in
the template definition nor found by argument-dependent lookup
iss >> result;
^
c1.cpp:39:15: note: in instantiation of function template specialization
'Bar::convert<Bar::Foo>' requested here
return !bar.convert("bar foo", foo);
^
c1.cpp:27:17: note: 'operator>>' should be declared prior to the call site or
in the global namespace
std::istream& operator>>(std::istream& is, Bar::Foo& foo)
I think it should compile as unnamed namespace specifies internal linkage like
static keyword. When unnamed namespace is replaced with static keyword the code
compiles, so the behavior seems pretty inconsistent.</pre>
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