27 Input/output library [input.output]

27.9.1.14 Class template basic_fstream [fstream]

namespace std {
  template <class charT, class traits=char_traits<charT> >
  class basic_fstream
    : public basic_iostream<charT,traits> {

  public:
    typedef charT                     char_type;
    typedef typename traits::int_type int_type;
    typedef typename traits::pos_type pos_type;
    typedef typename traits::off_type off_type;
    typedef traits                    traits_type;

    // constructors/destructor
    basic_fstream();
    explicit basic_fstream(const char* s,
        ios_base::openmode mode = ios_base::in|ios_base::out);
    explicit basic_fstream(const string& s,
        ios_base::openmode mode = ios_base::in|ios_base::out);
    basic_fstream(const basic_fstream& rhs) = delete;
    basic_fstream(basic_fstream&& rhs);

    // [fstream.assign] Assign/swap:
    basic_fstream& operator=(const basic_fstream& rhs) = delete;
    basic_fstream& operator=(basic_fstream&& rhs);
    void swap(basic_fstream& rhs);

    // Members:
    basic_filebuf<charT,traits>* rdbuf() const;
    bool is_open() const;
    void open(const char* s,
        ios_base::openmode mode = ios_base::in|ios_base::out);
    void open(const string& s,
        ios_base::openmode mode = ios_base::in|ios_base::out);
    void close();

  private:
    basic_filebuf<charT,traits> sb; // exposition only
  };

  template <class charT, class traits>
  void swap(basic_fstream<charT, traits>& x,
            basic_fstream<charT, traits>& y);
}