<td class="none" align="center">No</td>
 </tr>
 <tr>
  <td><tt>= delete("should have a reason");</tt></td>
  <td><a href="https://wg21.link/P2573R2">P2573R2</a></td>
  <td class="full" align="center">Clang 19</td>
 </tr>
 <tr>
  <td>Variadic friends</td>
  <td><a href="https://wg21.link/P2893R3">P2893R3</a></td>
  <td class="full" align="center">Clang 20</td>
 </tr>
 <!-- Summer 2024 papers (St Louis) -->
 <tr>
  <td><tt>constexpr</tt> placement new</td>
  <td><a href="https://wg21.link/P2747R2">P2747R2</a>