eld</a></span> <span>&#45;&gt;</span> string</code></dt><dt class="spec value" id="val-addr"><a href="#val-addr" class="anchor"></a><code><span class="keyword">val</span> addr : <span><span>(<span class="type-var">'a</span>, <span class="type-var">'b</span>)</span> <a href="index.html#type-structured">structured</a></span> <span>&#45;&gt;</span> <span><span><span>(<span class="type-var">'a</span>, <span class="type-var">'b</span>)</span> <a href="index.html#type-structured">structured</a></span> <a href="