29 Input/output library [input.output]

29.12 File systems [filesystems]

29.12.13 Filesystem operation functions [fs.op.funcs]

29.12.13.14 Exists [fs.op.exists]

bool filesystem::exists(file_status s) noexcept;
Returns: status_­known(s) && s.type() != file_­type​::​not_­found.
bool filesystem::exists(const path& p); bool filesystem::exists(const path& p, error_code& ec) noexcept;
Let s be a file_­status, determined as if by status(p) or status(p, ec), respectively.
Effects: The signature with argument ec calls ec.clear() if status_­known(s).
Returns: exists(s).
Throws: As specified in [fs.err.report].