ass="mendoza-code">tag</code>. If no such capture exists then the match fails. </td></tr>
    <tr><td><code class="mendoza-code">(-&gt; tag ?tag)</code> </td> <td> Alias for <code class="mendoza-code">(backref tag)</code>. </td></tr>
    <tr><td><code class="mendoza-code">(error patt)</code> </td> <td> Throws a Janet error if patt matches. The error thrown will be the last capture of patt, or a generic error if patt produces no captures. </td></tr>
    <tr><td><code class="mendoza-code">(drop patt)</code> <