s="anchor"></a><code><span class="keyword">module</span> <a href="Functions/index.html">Functions</a> : <span class="keyword">sig</span> ... <span class="keyword">end</span></code></div><dl><dt class="spec value" id="val-($&gt;)"><a href="#val-($&gt;)" class="anchor"></a><code><span class="keyword">val</span> ($&gt;) : <span><span class="type-var">'a</span> <a href="argument-1-F/index.html#type-t">F.t</a></span> <span>&#45;&gt;</span> <span class="type-var">'b</span> <span>&#45;&gt;</span> <span><span class