[ofstream.members]

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basic_filebuf<charT, traits>* rdbuf() const;

Returns: const_cast<basic_filebuf<charT, traits>*>(addressof(sb).

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native_handle_type native_handle() const noexcept;

Effects: Equivalent to: return rdbuf()->native_handle();

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bool is_open() const;

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]

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();

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);

Effects: Calls open(s.c_str(), mode).

31 Input/output library [input.output]

31.10 File-based streams [file.streams]

31.10.5 Class template basic_ofstream [ofstream]

31.10.5.4 Member functions [ofstream.members]