29 Input/output library [input.output]

29.9 File-based streams [file.streams]

29.9.4 Class template basic_­ofstream [ofstream]

29.9.4.3 Member functions [ofstream.members]

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basic_filebuf<charT, traits>* rdbuf() const;
1
#
Returns: const_­cast<basic_­filebuf<charT, traits>*>(addressof(sb)).
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bool is_open() const;
2
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Returns: rdbuf()->is_­open().
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void open(const char* s, ios_base::openmode mode = ios_base::out); void open(const filesystem::path::value_type* s, ios_base::openmode mode = ios_base::out); // wide systems only; see [fstream.syn]
3
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Effects: Calls rdbuf()->open(s, mode | ios_­base​::​out).
If that function does not return a null pointer calls clear(), otherwise calls setstate(​failbit) (which may throw ios_­base​::​failure) ([iostate.flags]).
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void close();
4
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Effects: Calls rdbuf()->close() and, if that function fails (returns a null pointer), calls setstate(​failbit) (which may throw ios_­base​::​failure) ([iostate.flags]).
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void open(const string& s, ios_base::openmode mode = ios_base::out); void open(const filesystem::path& s, ios_base::openmode mode = ios_base::out);
5
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Effects: Calls open(s.c_­str(), mode).