bsp;<span class="keyword">val</span>&nbsp;dummy_pos&nbsp;:&nbsp;<span class="constructor">Lexing</span>.position<br>
&nbsp;&nbsp;<span class="keyword">type</span>&nbsp;lexbuf&nbsp;=&nbsp;{<br>
&nbsp;&nbsp;&nbsp;&nbsp;refill_buff&nbsp;:&nbsp;<span class="constructor">Lexing</span>.lexbuf&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;unit;<br>
&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">mutable</span>&nbsp;lex_buffer&nbsp;:&nbsp;bytes;<br>
&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">mutable</span>&nbsp