xbuf&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;int&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;char<br>
&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;lexeme_start&nbsp;:&nbsp;<span class="constructor">Lexing</span>.lexbuf&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;int<br>
&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;lexeme_end&nbsp;:&nbsp;<span class="constructor">Lexing</span>.lexbuf&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;int<br>
&nbsp;&nbsp;<span class="keyword">val</s