         <span class="identifier">i</span><span class="special">)</span><span class="keyword">const</span> <span class="special">;</span></code>
                  </p>
                </td>
<td>
                  <p>
                    Returns <code class="computeroutput"><span class="identifier">what</span><span class="special">(</span><span class="identifier">i</span><span class="special">);</span></code> Can be used to simplify access
                    to sub-expression matches, and make usage more pe