pare : <a href="index.html#type-t">t</a> <span>&#45;&gt;</span> <a href="index.html#type-t">t</a> <span>&#45;&gt;</span> int</code></dt></dl></div></div></div><dl><dt class="spec value" id="val-matches"><a href="#val-matches" class="anchor"></a><code><span class="keyword">val</span> matches : <span>caller:<a href="index.html#type-t">t</a></span> <span>&#45;&gt;</span> <span>callee:<a href="index.html#type-t">t</a></span> <span>&#45;&gt;</span> bool</code></dt><dd><p>Return true if the <code>caller</code> el