|</span>&nbsp;<span class="constructor">Psig_typext</span>&nbsp;<span class="keyword">of</span>&nbsp;<span class="constructor">Parsetree</span>.type_extension<br>
&nbsp;&nbsp;&nbsp;&nbsp;<span class="keywordsign">|</span>&nbsp;<span class="constructor">Psig_exception</span>&nbsp;<span class="keyword">of</span>&nbsp;<span class="constructor">Parsetree</span>.type_exception<br>
&nbsp;&nbsp;&nbsp;&nbsp;<span class="keywordsign">|</span>&nbsp;<span class="constructor">Psig_module</span>&nbsp;<span class="keywor