Defined in header
bool status_known( file_status s );
Checks if the given file status is known, Equivalent to s.type() != file_type::none.
|s||-||file status to check|
 Return value
true if the given file status is an unknown file status
Despite the name, the function checks for the file status of
file_type::none (meaning an error occurred), not
file_type::unknown (meaning file exists, but its type cannot be determined).
 See also
| determines file attributes|
determines file attributes, checking the symlink target
| cached status of the file designated by this directory entry|
cached symlink_status of the file designated by this directory entry
(public member function of