 -2 if there is more than @len strings</td></tr></tbody></table></div><h3><a name="xmlExpIsNillable" id="xmlExpIsNillable"></a>Function: xmlExpIsNillable</h3><pre class="programlisting">int	xmlExpIsNillable		(<a href="libxml-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> exp)<br />
</pre><p>Finds if the expression is nillable, i.e. if it accepts the empty sequqnce</p>
<div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>exp</tt></i>:</span></td><td>the ex