class Kramdown::Parser::Kramdown

def parse_attribute_list(str, opts)
  return if str.strip.empty? || str.strip == ':'
  attrs = str.scan(ALD_TYPE_ANY)
  attrs.each do |key, sep, val, ref, id_and_or_class, _, _|
    if ref
      (opts[:refs] ||= []) << ref
    elsif id_and_or_class
      id_and_or_class.scan(ALD_TYPE_ID_OR_CLASS).each do |id_attr, class_attr|
        if class_attr
          opts[IAL_CLASS_ATTR] = (opts[IAL_CLASS_ATTR] || '') << " #{class_attr}"
          opts[IAL_CLASS_ATTR].lstrip!
        else
          opts['id'] = id_attr
        end
      end
    else
      val.gsub!(/\\(\}|#{sep})/, "\\1")
      opts[key] = val
    end
  end
  warning("No or invalid attributes found in IAL/ALD content: #{str}") if attrs.length == 0
end