[next,end)</td>

      <td>If the return value is true, the new token is assigned to tok. next
      is always updated to the position where parsing should start on the
      subsequent call.</td>
    </tr>

    <tr>
      <td>reset</td>

      <td><tt>reset()</tt></td>

      <td><tt>None</tt></td>

      <td>Clears out all state variables that are used by the object in
      parsing the current sequence.</td>

      <td>A new sequence to parse can be given.</td>
    </tr>
  </table>

  <h2>Complexity guar