std::filesystem::status_known(3)

NAME
std::filesystem::status_known - std::filesystem::status_known

Synopsis
   Defined in header <filesystem>
   bool status_known( std::filesystem::file_status s ) noexcept; (1) (since C++17)
   Checks if the given file status is known, equivalent to s.type() != file_type::none.

Parameters
   s - file status to check

Return value
   true if the given file status is a known file status.

Notes
   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
   status determines file attributes
   symlink_status determines file attributes, checking the symlink target
   (C++17) (function)
   (C++17)
   status status of the file designated by this directory entry;
   symlink_status status of the file/symlink designated by this directory entry
                  (public member function of std::filesystem::directory_entry)