 8</td>
    </tr>
    <tr>
      <td>Feature test macros</td>
      <td><a href="https://wg21.link/p0941r2">P0941R2</a></td>
      <td class="full" align="center"><a href="#sd6">(see below)</a></td>
    </tr>
    <tr>
      <td><tt>explicit(bool)</tt></td>
      <td><a href="https://wg21.link/p0892r2">P0892R2</a></td>
      <td class="full" align="center">Clang 9</td>
    </tr>
    <!-- San Diego papers -->
    <tr>
      <td>Signed integers are two's complement</td>
      <td><a href="https://wg21.link/p12