namespace std {
template<class charT, class traits = char_traits<charT>>
class basic_streambuf {
public:
using char_type = charT;
using int_type = typename traits::int_type;
using pos_type = typename traits::pos_type;
using off_type = typename traits::off_type;
using traits_type = traits;
virtual ~basic_streambuf();
locale pubimbue(const locale& loc);
locale getloc() const;
basic_streambuf* pubsetbuf(char_type* s, streamsize n);
pos_type pubseekoff(off_type off, ios_base::seekdir way,
ios_base::openmode which
= ios_base::in | ios_base::out);
pos_type pubseekpos(pos_type sp,
ios_base::openmode which
= ios_base::in | ios_base::out);
int pubsync();
streamsize in_avail();
int_type snextc();
int_type sbumpc();
int_type sgetc();
streamsize sgetn(char_type* s, streamsize n);
int_type sputbackc(char_type c);
int_type sungetc();
int_type sputc(char_type c);
streamsize sputn(const char_type* s, streamsize n);
protected:
basic_streambuf();
basic_streambuf(const basic_streambuf& rhs);
basic_streambuf& operator=(const basic_streambuf& rhs);
void swap(basic_streambuf& rhs);
char_type* eback() const;
char_type* gptr() const;
char_type* egptr() const;
void gbump(int n);
void setg(char_type* gbeg, char_type* gnext, char_type* gend);
char_type* pbase() const;
char_type* pptr() const;
char_type* epptr() const;
void pbump(int n);
void setp(char_type* pbeg, char_type* pend);
virtual void imbue(const locale& loc);
virtual basic_streambuf* setbuf(char_type* s, streamsize n);
virtual pos_type seekoff(off_type off, ios_base::seekdir way,
ios_base::openmode which
= ios_base::in | ios_base::out);
virtual pos_type seekpos(pos_type sp,
ios_base::openmode which
= ios_base::in | ios_base::out);
virtual int sync();
virtual streamsize showmanyc();
virtual streamsize xsgetn(char_type* s, streamsize n);
virtual int_type underflow();
virtual int_type uflow();
virtual int_type pbackfail(int_type c = traits::eof());
virtual streamsize xsputn(const char_type* s, streamsize n);
virtual int_type overflow(int_type c = traits::eof());
};
}