<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/99278>99278</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [Clang][C++26] Clang overly generalizes the change in P3144R2 to pointers to incomplete enumration types
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            clang
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          frederick-vs-ja
      </td>
    </tr>
</table>

<pre>
    Despite the title being "Deleting a Pointer to an Incomplete Type Should be Ill-formed", [P3144R2](https://wg21.link/p3144r2) only made deleting pointers to incomplete class types.

So, currently the following definition is supposed to be well-formed. But Clang currently reject it ([Godbolt link](https://godbolt.org/z/aMPasEfad)).
```C++
enum E {
 zero = decltype(delete static_cast<E*>(nullptr), 0){} // E is incomplete here
};
```

Not sure whether the standard or Clang should be fixed. As it's already very tricky to attempt to delete a pointer to an incomplete enumeration type, a CWG issue might be wanted to reject such delete-expressions.
</pre>
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