="#type-elt">elt</a> * <span><span>int list</span> list</span></span></code></li><li id="type-op.Concatenate" class="def variant constructor anchored"><a href="#type-op.Concatenate" class="anchor"></a><code><span>| </span><span><span class="constructor">Concatenate</span> <span class="keyword">of</span> int</span></code></li><li id="type-op.Stack" class="def variant constructor anchored"><a href="#type-op.Stack" class="anchor"></a><code><span>| </span><span><span class="constructor">Stack</span> <span class