31 Input/output library [input.output]

31.7 Formatting and manipulators [iostream.format]

31.7.6 Output streams [output.streams]

31.7.6.2 Class template basic_ostream [ostream]

31.7.6.2.5 Seek members [ostream.seeks]

1
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Each seek member function begins execution by constructing an object of class sentry.
It returns by destroying the sentry object.
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pos_type tellp();
2
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Returns: If fail() != false, returns pos_type(-1) to indicate failure.
Otherwise, returns rdbuf()->​pubseekoff(​0, cur, out).
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basic_ostream& seekp(pos_type pos);
3
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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).
4
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Returns: *this.
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basic_ostream& seekp(off_type off, ios_base::seekdir dir);
5
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Effects: If fail() != true, executes rdbuf()->pubseekoff(off, dir, ios_base​::​out).
In case of failure, the function calls setstate(failbit) (which may throw ios_base​::​failure).
6
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Returns: *this.