"identifier">get</span><span class="special">();</span>
</pre>
<p>
        The x3::error_handler handles all the nitty gritty details such as determining
        the line number and actual column position, and formatting the error message
        printed. All we have to do is provide the actual error string which we extract
        from the <code class="computeroutput"><span class="identifier">expectation_failure</span></code>
        exception:
      </p>
<pre class="programlisting"><span class="identifier