Emacs Lisp function with optional argument call other function

Question

I have function like this:

(defun swap-region-ring ()
  "replace selected text with the one from kill ring"
  (interactive)
  (backward-delete-char (- (point) (mark)))
  (yank))

(global-set-key (kbd "C-c y") 'swap-region-ring)

How can I rewrite that function to call yank with argument and have also optional argument so it act the same as yank? So I can call C-u 2 C-c y

legoscia · Accepted Answer · 2014-02-26 11:42:04Z

1

yank happens to accept a "raw prefix argument" as its argument, so you can pick it up and forward it:

(defun swap-region-ring (&optional arg)
  "replace selected text with the one from kill ring"
  (interactive "*P")
  (backward-delete-char (- (point) (mark)))
  (yank arg))

Type C-h f interactive for more information about the interactive spec.

answered Feb 26, 2014 at 11:42

legoscia

42.1k23 gold badges123 silver badges179 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Emacs Lisp function with optional argument call other function

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related