[ifstream.general] (original) (raw)

31 Input/output library [input.output]

31.10 File-based streams [file.streams]

31.10.4 Class template basic_ifstream [ifstream]

31.10.4.1 General [ifstream.general]

namespace std { template<class charT, class traits = char_traits<charT>> class basic_ifstream : public basic_istream<charT, traits> { public: using char_type = charT;using int_type = typename traits::int_type;using pos_type = typename traits::pos_type;using off_type = typename traits::off_type;using traits_type = traits;using native_handle_type = typename basic_filebuf<charT, traits>::native_handle_type; basic_ifstream();explicit basic_ifstream(const char* s, ios_base::openmode mode = ios_base::in);explicit basic_ifstream(const filesystem::path::value_type* s, ios_base::openmode mode = ios_base::in);explicit basic_ifstream(const string& s, ios_base::openmode mode = ios_base::in);template<class T> explicit basic_ifstream(const T& s, ios_base::openmode mode = ios_base::in); basic_ifstream(const basic_ifstream&) = delete; basic_ifstream(basic_ifstream&& rhs); basic_ifstream& operator=(const basic_ifstream&) = delete; basic_ifstream& operator=(basic_ifstream&& rhs);void swap(basic_ifstream& rhs); basic_filebuf<charT, traits>* rdbuf() const; native_handle_type native_handle() const noexcept;bool is_open() const;void open(const char* s, ios_base::openmode mode = ios_base::in);void open(const filesystem::path::value_type* s, ios_base::openmode mode = ios_base::in); void open(const string& s, ios_base::openmode mode = ios_base::in);void open(const filesystem::path& s, ios_base::openmode mode = ios_base::in);void close();private: basic_filebuf<charT, traits> sb; };}

The classbasic_ifstream<charT, traits>supports reading from named files.

It uses abasic_filebuf<​charT, traits>object to control the associated sequence.

For the sake of exposition, the maintained data is presented here as: