variant constructor"><a href="#type-inst.Iformal" class="anchor"></a><code><span>| </span><span><span class="constructor">Iformal</span> <span class="keyword">of</span> <a href="#type-zero_flag">zero_flag</a> * <a href="#type-null_case_flag">null_case_flag</a></span></code></td></tr><tr id="type-inst.Iinitial" class="anchored"><td class="def variant constructor"><a href="#type-inst.Iinitial" class="anchor"></a><code><span>| </span><span><span class="constructor">Iinitial</span></span></code></td></tr><tr id