- virtual void Save(const std::string &path, const void *flag, const Functor<void (std::streambuf &)> &code) = 0;
- virtual bool Open(const std::string &path, const Functor<void (std::streambuf &, const void *)> &code) = 0;
- virtual void Find(const std::string &path, const Functor<void (const std::string &, const Functor<void (const Functor<void (std::streambuf &, std::streambuf &)> &)> &)> &code, const Functor<void (const std::string &, const Functor<std::string ()> &)> &link) = 0;
+ virtual void Save(const std::string &path, bool edit, const void *flag, const Functor<void (std::streambuf &)> &code) = 0;
+ virtual bool Look(const std::string &path) const = 0;
+ virtual void Open(const std::string &path, const Functor<void (std::streambuf &, size_t, const void *)> &code) const = 0;
+ virtual void Find(const std::string &path, const Functor<void (const std::string &)> &code, const Functor<void (const std::string &, const Functor<std::string ()> &)> &link) const = 0;