 to the current input position. 
      Held by reference</td>
  </tr>
  <tr>
    <td class="table_cells"><code><span class=identifier>IteratorT </span><span class=keyword>const</span> 
      <span class=identifier>last</span><span class=special></span></code></td>
    <td class="table_cells">The iterator pointing to the end of the input. Held 
      by value</td>
  </tr>
</table>
<p> The basic behavior of the scanner is handled by policies. The actual execution 
  of the scanner's public member functions li