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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Should NamedDecl::declarationReplaces consider friend status?"
href="https://llvm.org/bugs/show_bug.cgi?id=30994">30994</a>
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<th>Summary</th>
<td>Should NamedDecl::declarationReplaces consider friend status?
</td>
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<th>Product</th>
<td>new-bugs
</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>Windows NT
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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
</td>
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<th>Component</th>
<td>new bugs
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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</tr>
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<th>Reporter</th>
<td>yaron.keren@gmail.com
</td>
</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk, vvasilev@cern.ch
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<th>Classification</th>
<td>Unclassified
</td>
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<p>
<div>
<pre>Given the code
namespace boost {
template <class> class shared_ptr {
template <class> friend class shared_ptr;
};
}
shared_ptr<char> c;
shared_ptr<int> i;
shared_ptr<char> is created with its TemplateDecl being the class shared_ptr
while shared_ptr<int> TemplateDecl is the friend TemplateDecl created in
shared_ptr<char>.
This happens because the friend TemplateDecl created in shared_ptr<char>
replaces the original class TemplateDecl.
It seems inconsistent that both ClassTemplateSpecializationDecl have different
TemplateDecl.
To solve this, we could demand same friendness in
NamedDecl::declarationReplaces
bool NamedDecl::declarationReplaces(NamedDecl *OldD, bool IsKnownNewer) const {
...
// Friend should not replace non-friend.
if (OldD->getFriendObjectKind() != getFriendObjectKind())
return false;</pre>
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