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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Duplicate USR generated for typedefs in template classes"
href="https://llvm.org/bugs/show_bug.cgi?id=28405">28405</a>
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<th>Summary</th>
<td>Duplicate USR generated for typedefs in template classes
</td>
</tr>
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<th>Product</th>
<td>clang
</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
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>libclang
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>dpldobrev@protonmail.com
</td>
</tr>
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<th>CC</th>
<td>klimek@google.com, llvm-bugs@lists.llvm.org
</td>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>#include <string>
template <typename T>
class variant
{
private:
typedef std::aligned_storage<16, 8>::type data_type;
data_type data;
variant<int>* specializeTypeAliasTemplate;
};
If the above code is parsed with the Clang API, the USR for "data_type" is the
same for "variant" and "variant<int>". The problem is in
USRGenerator::VisitTypedefDecl
(<a href="http://clang.llvm.org/doxygen/USRGeneration_8cpp_source.html">http://clang.llvm.org/doxygen/USRGeneration_8cpp_source.html</a>, line 511 at the
time of writing). It handles the declaration context just as a NamedDecl which
in the case of a template and one of its specialisations results in the same
string.</pre>
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</p>
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