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;
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);
explicit basic_ifstream(const filesystem::path& 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;
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;
};
template<class charT, class traits>
void swap(basic_ifstream<charT, traits>& x,
basic_ifstream<charT, traits>& y);
}
The class
basic_ifstream<charT, traits>
supports reading from named files
.It uses a
basic_filebuf<charT, traits>
object to control the associated
sequence
.For the sake of exposition, the maintained data is presented here as: