lass="keyword">and</span>&nbsp;payload&nbsp;=<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="constructor">PStr</span>&nbsp;<span class="keyword">of</span>&nbsp;<span class="constructor">Parsetree</span>.structure<br>
&nbsp;&nbsp;&nbsp;&nbsp;<span class="keywordsign">|</span>&nbsp;<span class="constructor">PSig</span>&nbsp;<span class="keyword">of</span>&nbsp;<span class="constructor">Parsetree</span>.signature<br>
&nbsp;&nbsp;&nbsp;&nbsp;<span class="keywordsign">|</span>&nbsp;<span class="constructor