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Re: comment / uncomment region
From: |
Pascal Bourguignon |
Subject: |
Re: comment / uncomment region |
Date: |
01 Aug 2004 03:57:32 +0200 |
User-agent: |
Gnus/5.09 (Gnus v5.9.0) Emacs/21.3 |
exits funnel <exitsfunnel@yahoo.com> writes:
> Hello,
>
> I'm having trouble getting comment-region and
> uncomment-region to work in the .grammar files I'm
> editing. I'm pretty new to Emacs but I understnad
> they don't work because there is no major mode for
> these sablecc grammar files. I've looked at the doc a
> bit and I understand that I have to set the variable
> comment-start to "//" but when I evaluate (setq
> comment-start) in the scratch buffer it seems to
> change the value only for that buffer. Can anyone
> give me a jump start here? Ideally, I'd like to be
> able to put something in my .emacs file which will set
> its value for any active .grammar file, but I'd be
> satisfied if I could at least figure out how to set it
> interactively for the current buffer. Thanks in
> advance.
Yes, that's because comment-start is a buffer-local variable.
You have to set it in your grammar buffer.
You can do it manually with:
M-x eval-expression RET (setq comment-start "//") RET
or rather:
M-x set-variable RET comment-start RET "//" RET
You could put this at the end of each of your grammar files:
// Local Variables:
// comment-start: "//"
// End:
Or, if you don't want to program a mode for your grammar files you
could have a find-file-hook that would check the file type (or file
name extension) and would initialize the buffer environment when it
finds that a grammar is being opened. Something like:
(add-hook 'find-file-hook
(lambda ()
(when (string-match "\\.grammar$" (buffer-file-name))
(setf comment-start "//")
;; ...
)))
--
__Pascal Bourguignon__ http://www.informatimago.com/
There is no worse tyranny than to force a man to pay for what he does not
want merely because you think it would be good for him. -- Robert Heinlein