/docs/papers/2006/n1987.htm">N1987</a></td>
      <td class="full" align="center">Clang 2.9</td>
    </tr>
    <tr>
      <td>Null pointer constant</td>
      <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2431.pdf">N2431</a></td>
      <td class="full" align="center">Clang 3.0</td>
    </tr>
    <tr>
      <td>Strongly-typed enums</td>
      <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2347.pdf">N2347</a></td>
      <td class="full" align="center">Clang 2.9</