dt class="spec value" id="val-tl_exn"><a href="#val-tl_exn" class="anchor"></a><code><span class="keyword">val</span> tl_exn : <span><span class="type-var">'a</span> <a href="index.html#type-t">t</a></span> <span>&#45;&gt;</span> <span><span class="type-var">'a</span> <a href="index.html#type-t">t</a></span></code></dt><dt class="spec value" id="val-findi"><a href="#val-findi" class="anchor"></a><code><span class="keyword">val</span> findi : <span><span class="type-var">'a</span> <a href="index.html#type-t"