" align="center">Clang 9</td>
      </tr>
    <tr>
      <td>Deleted functions</td>
      <td><a href="https://wg21.link/n2346">N2346</a></td>
      <td class="full" align="center">Clang 2.9</td>
    </tr>
    <tr>
      <td>Extended friend declarations</td>
      <td><a href="https://wg21.link/n1791">N1791</a></td>
      <td class="full" align="center">Clang 2.9</td>
    </tr>
    <tr>
      <td>Extending <code>sizeof</code></td>
      <td><a href="https://wg21.link/n2253">N2253</a>
      <br><a href="http