Function: digit-argument

digit-argument is an interactive and byte-compiled function defined in simple.el.gz.

Signature

(digit-argument ARG)

Documentation

Part of the numeric argument for the next command.

C-u (universal-argument) following digits or minus sign ends the argument.

View in manual

Key Bindings

Source Code

;; Defined in /usr/src/emacs/lisp/simple.el.gz
(defun digit-argument (arg)
  "Part of the numeric argument for the next command.
\\[universal-argument] following digits or minus sign ends the argument."
  (interactive "P")
  (prefix-command-preserve-state)
  (let* ((char (if (integerp last-command-event)
		   last-command-event
		 (get last-command-event 'ascii-character)))
	 (digit (- (logand char ?\177) ?0)))
    (setq prefix-arg (cond ((integerp arg)
                            (+ (* arg 10)
			       (if (< arg 0) (- digit) digit)))
                           ((eq arg '-)
                            ;; Treat -0 as just -, so that -01 will work.
                            (if (zerop digit) '- (- digit)))
                           (t
                            digit))))
  (universal-argument--mode))