basic_ifstream::open

Opens a file.

void open(
    const char *_Filename,
    ios_base::openmode _Mode = ios_base::in,
    int _Prot = (int)ios_base::_Openprot
);
void open(
    const char *_Filename,
    ios_base::openmode _Mode
);
void open(
    const wchar_t *_Filename,
    ios_base::openmode _Mode = ios_base::in,
    int _Prot = (int)ios_base::_Openprot
);
void open(
    const wchar_t *_Filename,
    ios_base::openmode _Mode
);

Parameters

• _Filename
  The name of the file to open.

• _Mode
  One of the enumerations in ios_base::openmode.

• _Prot
  The default file opening protection.

Remarks

The member function calls rdbuf -> open(_Filename, _Mode | ios_base::in). If open fails, the function calls setstate(failbit), which may throw an ios_base::failure exception.

Example

See basic_filebuf::open for an example that uses open.

Requirements

Header: <fstream>

Namespace: std

See Also

Concepts

basic_ifstream Class

basic_ifstream Members

iostream Programming

iostreams Conventions