 <p>
                      Invoke <code class="computeroutput"><span class="identifier">fp</span></code> at
                      parse time, returning a parser <code class="computeroutput"><span class="identifier">p</span></code>
                      which is then called to parse.
                    </p>
                  </td>
</tr>
<tr>
<td>
                    <p>
                      <code class="computeroutput"><span class="identifier">fp</span></code>
                    </p>
                  </t