Function: undefined

undefined is an interactive and byte-compiled function defined in subr.el.gz.

Signature

(undefined)

Documentation

Beep to tell the user this binding is undefined.

Probably introduced at or before Emacs version 16.

Key Bindings

Source Code

;; Defined in /usr/src/emacs/lisp/subr.el.gz
(defun undefined ()
  "Beep to tell the user this binding is undefined."
  (declare (completion ignore))
  (interactive)
  (ding)
  (if defining-kbd-macro
      (error "%s is undefined" (key-description (this-single-command-keys)))
    (message "%s is undefined" (key-description (this-single-command-keys))))
  (force-mode-line-update)
  ;; If this is a down-mouse event, don't reset prefix-arg;
  ;; pass it to the command run by the up event.
  (setq prefix-arg
        (when (memq 'down (event-modifiers last-command-event))
          current-prefix-arg)))