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