class="spec value" id="val-contains_float"><a href="#val-contains_float" class="anchor"></a><code><span class="keyword">val</span> contains_float : <a href="index.html#type-t">t</a> <span>&#45;&gt;</span> float <span>&#45;&gt;</span> bool</code></dt><dd><p>predicates</p></dd></dl><dl><dt class="spec value" id="val-is_positive"><a href="#val-is_positive" class="anchor"></a><code><span class="keyword">val</span> is_positive : <a href="index.html#type-t">t</a> <span>&#45;&gt;</span> bool</code></dt><dt class="