pan class="keyword">of</span> int * <span><a href="#type-elt">elt</a> <span class="arrow">&#45;&gt;</span></span> <span><a href="#type-elt">elt</a> <span class="arrow">&#45;&gt;</span></span> <a href="#type-elt">elt</a></span></code></li><li id="type-op.Scan" class="def variant constructor anchored"><a href="#type-op.Scan" class="anchor"></a><code><span>| </span><span><span class="constructor">Scan</span> <span class="keyword">of</span> int * <span><a href="#type-elt">elt</a> <span class="arrow">&#45;&gt;</