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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Friend template class not found outside of namespace"
href="http://llvm.org/bugs/show_bug.cgi?id=17950">17950</a>
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<th>Summary</th>
<td>Friend template class not found outside of namespace
</td>
</tr>
<tr>
<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>All
</td>
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<th>OS</th>
<td>All
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>-New Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>gafunchal@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>template<typename T>
class Class1;
namespace B {
template<typename U>
class Class2 {
template<typename V>
friend class Class1;
private:
int something_private;
};
}
template<typename T>
class Class1
{
void error() {
B::Class2 b;
b.something_private = 42;
}
};
Incorrectly issues an error because it things something_private is a private
member of B::Class2 (friend statement lookup didn't work). g++ correctly
doesn't flag an error.
Replacing the friend declaration by:
template<typename V>
friend class ::Class1;
Seems to fix the problem, confirming it looks like a name lookup problem.</pre>
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