                 Quit and fail. Return a no_match.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    retry
                  </p>
                </td>
<td>
                  <p>
                    Attempt error recovery, possibly moving the iterator position.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    accept
                  </p>
                </td>
<td>
                  <p>
               