/span><span class='id identifier rubyid_path_part'>path_part</span><span class='op'>|</span>
    <span class='kw'>if</span> <span class='id identifier rubyid_path_part'>path_part</span> <span class='op'>=~</span> <span class='tstring'><span class='regexp_beg'>/</span><span class='tstring_content'>^:(.+)$</span><span class='regexp_end'>/</span></span>
      <span class='id identifier rubyid_param_name'>param_name</span> <span class='op'>=</span> <span class='backref'>$1</span><span class='period'>.</span><sp