int_type underflow() override;
int_type pbackfail(int_type c = traits::eof()) override;
int_type overflow(int_type c = traits::eof()) override;
pos_type seekoff(off_type off, ios_base::seekdir way,
ios_base::openmode which
= ios_base::in | ios_base::out) override;
Conditions | Result | |
ios_base::in is set in which | positions the input sequence | |
ios_base::out is set in which | positions the output sequence | |
both ios_base::in and ios_base::out are
set in which and either way == ios_base::beg or way == ios_base::end | positions both the input and the output sequences | |
Otherwise | the positioning operation fails. |
pos_type seekpos(pos_type sp,
ios_base::openmode which
= ios_base::in | ios_base::out) override;
basic_streambuf<charT, traits>* setbuf(charT* s, streamsize n) override;