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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - clang-cl unqualified friend declaration"
href="https://bugs.llvm.org/show_bug.cgi?id=44531">44531</a>
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<th>Summary</th>
<td>clang-cl unqualified friend declaration
</td>
</tr>
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<th>Product</th>
<td>clang
</td>
</tr>
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<th>Version</th>
<td>9.0
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Windows NT
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Driver
</td>
</tr>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>tiagomacarios@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk
</td>
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<p>
<div>
<pre>The code below warns on windows but compiles fine on linux.
<a href="https://godbolt.org/z/20iVGc">https://godbolt.org/z/20iVGc</a>
<span class="quote">> type a.cpp</span >
class S;
namespace N
{
class SS
{
friend class S;
};
}
<span class="quote">>clang -c -std=c++17 -Weverything -v a.cpp</span >
clang version 9.0.0 (tags/RELEASE_900/final)
Target: x86_64-pc-windows-msvc
...
a.cpp:7:22: warning: unqualified friend declaration referring to type outside
of the nearest enclosing namespace is a Microsoft extension;
add a nested name specifier [-Wmicrosoft-unqualified-friend]
friend class S;
^
::
1 warning generated.</pre>
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