Function errorf

src/return_code.h:51–56

template <typename... T>
inline static ReturnCode errorf(
    const Status code,
    const std::string& message,
    T... args) {
  return ReturnCode(code, fmt::format(message, args...));
}

inline ReturnCode try_chain(
    const std::initializer_list<std::function<ReturnCode ()>>& op) {