message and how to add and retrieve additional arguments.</p>
<p><code><a href="../articles/erify.html">vignette("erify")</a></code> for a gentle introduction to this package.</p></div>
    </div>

    <div id="ref-examples">
    <h2>Examples</h2>
    <div class="sourceCode"><pre class="sourceCode r"><code><span class="r-in"><span><span class="va">x</span> <span class="op">&lt;-</span> <span class="fl">1.1</span></span></span>
<span class="r-in"><span><span class="fu">check_positive</span><span class="op">(