class RDoc::Markdown

def _HtmlBlockDir
  _save = self.pos
  while true # sequence
    _tmp = apply(:_HtmlBlockOpenDir)
    unless _tmp
      self.pos = _save
      break
    end
    while true
      _save2 = self.pos
      while true # choice
        _tmp = apply(:_HtmlBlockDir)
        break if _tmp
        self.pos = _save2
        _save3 = self.pos
        while true # sequence
          _save4 = self.pos
          _tmp = apply(:_HtmlBlockCloseDir)
          _tmp = _tmp ? nil : true
          self.pos = _save4
          unless _tmp
            self.pos = _save3
            break
          end
          _tmp = get_byte
          unless _tmp
            self.pos = _save3
          end
          break
        end # end sequence
        break if _tmp
        self.pos = _save2
        break
      end # end choice
      break unless _tmp
    end
    _tmp = true
    unless _tmp
      self.pos = _save
      break
    end
    _tmp = apply(:_HtmlBlockCloseDir)
    unless _tmp
      self.pos = _save
    end
    break
  end # end sequence
  set_failed_rule :_HtmlBlockDir unless _tmp
  return _tmp
end