c type" id="type-t" class="anchored"><a href="#type-t" class="anchor"></a><code><span><span class="keyword">type</span> <span>!'a t</span></span></code></div></div><div class="odoc-spec"><div class="spec value" id="val-empty" class="anchored"><a href="#val-empty" class="anchor"></a><code><span><span class="keyword">val</span> empty : <span><span class="type-var">'a</span> <a href="#type-t">t</a></span></span></code></div></div><div class="odoc-spec"><div class="spec value" id="val-is_empty" class="anchored"