27 Input/output library [input.output]

27.7 Formatting and manipulators [iostream.format]

27.7.3 Output streams [output.streams] basic_ostream seek members [ostream.seeks]

Each seek member function begins execution by constructing an object of class sentry. It returns by destroying the sentry object.

pos_type tellp();

Returns: If fail() != false, returns pos_type(-1) to indicate failure. Otherwise, returns rdbuf()->pubseekoff(0, cur, out). basic_ostream<charT,traits>& seekp(pos_type pos);

Effects: If fail() != true, executes rdbuf()->pubseekpos(pos, ios_base::out). In case of failure, the function calls setstate(failbit) (which may throw ios_base::failure).

Returns: *this.

basic_ostream<charT,traits>& seekp(off_type off, ios_base::seekdir dir);

Effects: If fail() != true, executes rdbuf()->pubseekoff(off, dir, ios_base::out).

Returns: *this.