 class="spec type anchored" id="type-op"><a href="#type-op" class="anchor"></a><code><span><span class="keyword">and</span> op</span><span> = <a href="#type-adjoint">adjoint</a> * <a href="#type-register">register</a> * <a href="#type-label">label</a></span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-tag"><a href="#val-tag" class="anchor"></a><code><span><span class="keyword">val</span> tag : <span>unit <span class="arrow">&#45;&gt;</span></span> int</span></code></div