pan><span><a href="../../index.html#type-t">t</a> <span class="xref-unresolved">Stdlib</span>.ref</span> <span class="arrow">&#45;&gt;</span></span> <a href="../../index.html#type-t">t</a> * <a href="../../index.html#type-t">t</a></span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-dr_a"><a href="#val-dr_a" class="anchor"></a><code><span><span class="keyword">val</span> dr_a : <span><a href="../../index.html#type-t">t</a> <span class="arrow">&#45;&gt;</span></span> <span