Re: Add functions to C-mode?

[David Hansen]

On Sat, 19 Apr 2008 13:04:06 +0200 saneman wrote:

> I would like to add/change the comment/uncomment function in the
> C-mode for emacs.
>
> Currently it only works when a piece of text is selected and then /*
> */ is inserted.
>
> I would like to change the function to just insert // even though some
> text might not be selected.
>
> Is that possible?

M-; should do just that.  Well in c-mode it will insert /* */ if no
region is selected and will wrap the comment delimiters if the region is
active.

If you insist on "//" (which is btw not ANSI C) you have to play around
a bit with the `comment-start' and `comment-end' variables.  Not tested:

(defun cxx-comments ()
  (set (make-local-variable comment-start) "// ")
  (set (make-local-variable comment-end "")))

(add-hook c-mode-hook #'cxx-comments)

David