wg21.link/p1668r1">P1668R1</a></td>
      </tr>
      <tr>
        <td><a href="https://wg21.link/p0784r7">P0784R7</a></td>
      </tr>
    <tr>
      <td>Prohibit aggregates with user-declared constructors</td>
      <td><a href="https://wg21.link/p1008r1">P1008R1</a></td>
      <td class="full" align="center">Clang 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><