;<span class="keyword">of</span>&nbsp;<span class="constructor">Parsetree</span>.module_type_declaration<br>
&nbsp;&nbsp;&nbsp;&nbsp;<span class="keywordsign">|</span>&nbsp;<span class="constructor">Pstr_open</span>&nbsp;<span class="keyword">of</span>&nbsp;<span class="constructor">Parsetree</span>.open_description<br>
&nbsp;&nbsp;&nbsp;&nbsp;<span class="keywordsign">|</span>&nbsp;<span class="constructor">Pstr_class</span>&nbsp;<span class="keyword">of</span>&nbsp;<span class="constructor">Parsetree</spa