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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Class typedef shadowing a name from outside the class"
href="https://bugs.llvm.org/show_bug.cgi?id=34658">34658</a>
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<th>Summary</th>
<td>Class typedef shadowing a name from outside the class
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>trunk
</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>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Frontend
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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</tr>
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<th>Reporter</th>
<td>brycelelbach@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Clang accepts this code: <a href="https://wandbox.org/permlink/BlhRVaLeR91drp6O">https://wandbox.org/permlink/BlhRVaLeR91drp6O</a>
But, [basic.scope.class] p5 of the C++ standard suggests it shouldn't:
typedef int I;
class D {
typedef I I; // error, even though no reordering involved
};
A colleague suggested that [basic.scope.class] p2 may be relevant as well: "A
name N used in a class S shall refer to the same declaration in its context and
when re-evaluated in the completed scope of S. No diagnostic is required for a
violation of this rule" (does this indicate that it's ill-formed but NDR?).
GCC rejects this: <a href="https://wandbox.org/permlink/1voYu1uVpGggY8W9">https://wandbox.org/permlink/1voYu1uVpGggY8W9</a>.
Is this code ill-formed? Should Clang reject it?</pre>
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