How do you comment out all or part of a Lisp s-exp using Paredit?

Question

When editing Lisp code, occasionally it\'s useful to entirely comment out a top-level definition, like this:

;(defun some-fn-which-is-broken (x)
;  ...)
         


        

Answer 1

Position the point on the first character of the whole sexp, mark the whole sexp with C-M-space, and issue M-; to do the commenting. If it is necessary to do so, your source code will also be re-formatted so that only the sexp you marked, and nothing that was also on the same line, is in a comment.

You can very easily make a simple command or even a macro to do that:

(defun comment-sexp ()
  "Comment out the sexp at point."
  (interactive)
  (save-excursion
    (mark-sexp)
    (paredit-comment-dwim)))