Emacs, copy current file and line number to clipboard

custom.el

(defun copy-current-line-position-to-clipboard ()
  "Copy current line in file to clipboard as '</path/to/file>:<line-number>'"
  (interactive)
  (let ((path-with-line-number
         (concat (buffer-file-name) "::" (number-to-string (line-number-at-pos)))))
    (when path-with-line-number
      (with-temp-buffer
        (insert path-with-line-number)
        (clipboard-kill-region (point-min) (point-max)))
      (message (concat path-with-line-number " copied to clipboard")))))

Adapted to my emacs os version