</a>Printer</h3></header><dl><dt class="spec value" id="val-to_string"><a href="#val-to_string" class="anchor"></a><code><span class="keyword">val</span> to_string : <a href="index.html#type-t">t</a> <span>&#45;&gt;</span> string</code></dt></dl></section><section><header><h3 id="simulation"><a href="#simulation" class="anchor"></a>Simulation</h3></header><dl><dt class="spec value" id="val-perform"><a href="#val-perform" class="anchor"></a><code><span class="keyword">val</span> perform : <a href="../Expr/in