hor"></a><code><span><span class="keyword">val</span> empty_program : <a href="#type-program">program</a></span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-add_program"><a href="#val-add_program" class="anchor"></a><code><span><span class="keyword">val</span> add_program : <span><a href="#type-program">program</a> <span class="arrow">&#45;&gt;</span></span> <span><a href="#type-program">program</a> <span class="arrow">&#45;&gt;</span></span> <a href="#type-program">pro