         <td class="paramname"><em>it</em></td><td>)</td>
          <td></td>
        </tr>
      </table>
</div><div class="memdoc">

<p>Advance iterator to next in-order key. </p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">it</td><td>Iterator to advance </td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>1 if moved to a valid element, 0 if now at end </dd></dl>

</div>
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