I am using Emacs, Slime, Paredit, and other packages to work on Common Lisp (SBCL). It is really useful to comment out multiple expressions while debugging.
For instance, suppose I have these placeholder expressions:
( ( ) ( (( ) ( ( ) ))))
I can use the keybinding
C-M-SPC which run's the command
mark-sexp on the second line. This character
-!- will be used to represent the cursor position.
( ( ) -!-( (( ) ( ( ) ))))
After invoking selecting the region, I can use the command
comment-dwin to comment the appropriate expressions. Then, Emacs automatically does (using ParEdit):
( ( ) -!-;; ( ;; (( ) ;; ( ( ) ;; ))) )
This is great. I just need to learn how to revert this after some editions inside the content of the expressions. Since there were other modifications, I cannot use
undo. So, how can I remove the
;; comments in a smart way?
A friend mentioned something like
rectangle-select but I could not find it.