f="dart-core/FormatException-class.html">FormatException</a> would be thrown,
<code>onError</code> is instead called with <code>source</code> as argument,
and the result of that call is returned by <a href="dart-core/int/parse.html">parse</a>.</p>
    </section>
    
    <section class="summary source-code" id="source">
      <h2><span>Implementation</span></h2>
      <pre class="language-dart"><code class="language-dart">external static int parse(String source,
    {int radix, @deprecated int onError(Strin