osition;<br>
&nbsp;&nbsp;}<br>
&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;from_channel&nbsp;:&nbsp;<span class="constructor">Pervasives</span>.in_channel&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;<span class="constructor">Lexing</span>.lexbuf<br>
&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;from_string&nbsp;:&nbsp;string&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;<span class="constructor">Lexing</span>.lexbuf<br>
&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;from_function&nbsp;: