std::filesystem::status_known - cppreference.com

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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

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 std::filesystem::file_type::none (meaning an error occurred), not std::filesystem::file_type::unknown (meaning file exists, but its type cannot be determined).

See also

determines file attributes
determines file attributes, checking the symlink target
(function) [edit]
status of the file designated by this directory entry;
status of the file/symlink designated by this directory entry
(public member function of std::filesystem::directory_entry) [edit]