uffer passed to the parsing
   function.</p>

<pre><span id="VALlexeme"><span class="keyword">val</span> lexeme</span> : <code class="type"><a href="Lexing.html#TYPElexbuf">lexbuf</a> -&gt; string</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code"><span class="constructor">Lexing</span>.lexeme&nbsp;lexbuf</code> returns the string matched by
           the regular expression.</p>
</div>
</div>

<pre><span id="VALlexeme_char"><span class="keyword">val</span> lexeme_char</span> : <c