nbsp;*&nbsp;<span class="constructor">Parsetree</span>.expression<br>
&nbsp;&nbsp;&nbsp;&nbsp;<span class="keywordsign">|</span>&nbsp;<span class="constructor">Pexp_constraint</span>&nbsp;<span class="keyword">of</span>&nbsp;<span class="constructor">Parsetree</span>.expression&nbsp;*&nbsp;<span class="constructor">Parsetree</span>.core_type<br>
&nbsp;&nbsp;&nbsp;&nbsp;<span class="keywordsign">|</span>&nbsp;<span class="constructor">Pexp_coerce</span>&nbsp;<span class="keyword">of</span>&nbsp;<span class="