struct rule_definition {
  // construct/copy/destruct
  rule_definition();

  list_of_list parameters;
  boost::shared_ptr<std::string> body;
  boost::function1<string_list,context&> native;
  boost::optional<std::string> module_name;
  bool exported;
  std::string commands;
  action_modifier::values modifiers;
  string_list binds;
  std::string filename;
  int line;
};