<span class="constructor">Ppat_exception</span>&nbsp;<span class="keyword">of</span>&nbsp;<span class="constructor">Parsetree</span>.pattern<br>
&nbsp;&nbsp;&nbsp;&nbsp;<span class="keywordsign">|</span>&nbsp;<span class="constructor">Ppat_extension</span>&nbsp;<span class="keyword">of</span>&nbsp;<span class="constructor">Parsetree</span>.extension<br>
&nbsp;&nbsp;&nbsp;&nbsp;<span class="keywordsign">|</span>&nbsp;<span class="constructor">Ppat_open</span>&nbsp;<span class="keyword">of</span>&nbsp;<span c