;<span class="keywordsign">|</span>&nbsp;<span class="constructor">Pexp_unreachable</span><br>
&nbsp;&nbsp;<span class="keyword">and</span>&nbsp;case&nbsp;=&nbsp;{<br>
&nbsp;&nbsp;&nbsp;&nbsp;pc_lhs&nbsp;:&nbsp;<span class="constructor">Parsetree</span>.pattern;<br>
&nbsp;&nbsp;&nbsp;&nbsp;pc_guard&nbsp;:&nbsp;<span class="constructor">Parsetree</span>.expression&nbsp;option;<br>
&nbsp;&nbsp;&nbsp;&nbsp;pc_rhs&nbsp;:&nbsp;<span class="constructor">Parsetree</span>.expression;<br>
&nbsp;&nbsp;}<br>
&nbsp;&nb