>)</span> <a href="index.html#type-t">t</a></span></code></dt><dt class="spec value" id="val-(=&lt;&lt;)"><a href="#val-(=&lt;&lt;)" class="anchor"></a><code><span class="keyword">val</span> (=&lt;&lt;) : <span class="arg"><span>(<span class="arg"><span class="type-var">'a</span> <span>&#45;&gt;</span> </span><span><span>(<span class="type-var">'b</span>, <span class="type-var">'x</span>)</span> <a href="index.html#type-t">t</a></span>)</span> <span>&#45;&gt;</span> </span><span class="arg"><span><span>(<s