basic_ostream<charT, traits>* tie() const;
basic_ostream<charT, traits>* tie(basic_ostream<charT, traits>* tiestr);
basic_streambuf<charT, traits>* rdbuf() const;
basic_streambuf<charT, traits>* rdbuf(basic_streambuf<charT, traits>* sb);
locale imbue(const locale& loc);
char narrow(char_type c, char dfault) const;
char_type widen(char c) const;
char_type fill() const;
char_type fill(char_type fillch);
basic_ios& copyfmt(const basic_ios& rhs);
void move(basic_ios& rhs);
void move(basic_ios&& rhs);
void swap(basic_ios& rhs) noexcept;
void set_rdbuf(basic_streambuf<charT, traits>* sb);