></a>Arguments</h2>
    <table class="ref-arguments">
    <colgroup><col class="name" /><col class="desc" /></colgroup>
    <tr>
      <th>expr</th>
      <td><p>The expression we pattern match against.</p></td>
    </tr>
    <tr>
      <th>match_expr</th>
      <td><p>The pattern specification, on the form pattern -&gt;
expression</p></td>
    </tr>
    <tr>
      <th>continue</th>
      <td><p>The expression that goes in the <code>else</code> part of the
<code>if</code> expression. If this is <code>NULL</