cppdraft_translate/cppdraft/fstream/cons.md

[fstream.cons]

31 Input/output library [input.output]

31.10 File-based streams [file.streams]

31.10.6 Class template basic_fstream [fstream]

31.10.6.2 Constructors [fstream.cons]

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basic_fstream();

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Effects: Initializes the base class withbasic_iostream<charT, traits>(addressof(sb)) ([iostream.cons]) andsb with basic_filebuf<charT, traits>().

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explicit basic_fstream( const char* s, ios_base::openmode mode = ios_base::in | ios_base::out); explicit basic_fstream( const filesystem::path::value_type* s, ios_base::openmode mode = ios_base::in | ios_base::out); // wide systems only; see [[fstream.syn]](fstream.syn "31.10.1 Header <fstream> synopsis")

2

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Effects: Initializes the base class withbasic_iostream<charT, traits>(addressof(sb)) ([iostream.cons]) andsb with basic_filebuf<charT, traits>().

Then callsrdbuf()->open(s, mode).

If that function returns a null pointer, callssetstate(failbit).

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explicit basic_fstream( const string& s, ios_base::openmode mode = ios_base::in | ios_base::out);

3

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Effects: Equivalent to basic_fstream(s.c_str(), mode).

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template<class T> explicit basic_fstream(const T& s, ios_base::openmode mode = ios_base::in | ios_base::out);

4

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Constraints: is_same_v<T, filesystem​::​path> is true.

5

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Effects: Equivalent to basic_fstream(s.c_str(), mode).

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basic_fstream(basic_fstream&& rhs);

6

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Effects: Move constructs the base class, and the contained basic_filebuf.

Then calls basic_istream<charT, traits>​::​set_rdbuf(​addressof(sb)) to install the contained basic_filebuf.