nge of value of a given expression within an abstract element</p></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-to_constraint"><a href="#val-to_constraint" class="anchor"></a><code><span><span class="keyword">val</span> to_constraint : <span><a href="#type-t">t</a> <span class="arrow">&#45;&gt;</span></span> <a href="../../Constraint/index.html#type-t">Constraint.t</a></span></code></div><div class="spec-doc"><p>transforms an abstract element into constraints</p></div></div><div