virtual int_type underflow();

bool is_open() const;

Defined in header

State state() const; (1)

char* str();

std::basic_string<CharT,Traits,Allocator> str() const; (1)

explicit basic_ostringstream( ios_base::openmode mode = ios_base::out );

fmtflags setf( fmtflags flags ); (1)

Defined in header

protected: virtual int_type overflow (int_type c = EOF);