      </td>
<td>
                    <p>
                      Copy construct rule <code class="computeroutput"><span class="identifier">r</span></code>
                      from rule <code class="computeroutput"><span class="identifier">r2</span></code>.
                    </p>
                  </td>
</tr>
<tr>
<td>
                    <p>
                      <code class="computeroutput"><span class="identifier">r</span> <span class="special">=</span>
                      <span class="identifier">r2<