GNU bug report logs - #10063
24.0.91; Making font-lock-mode-hook buffer-local while locally let-bound!

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Message #30 received at 10063 <at> debbugs.gnu.org (full text, mbox):

From: Wolfgang Jenkner <wjenkner <at> inode.at>
To: Katsumi Yamaoka <yamaoka <at> jpl.org>
Cc: Lars Magne Ingebrigtsen <larsi <at> gnus.org>, 10063 <at> debbugs.gnu.org,
	Leo <sdl.web <at> gmail.com>
Subject: Re: bug#10063: 24.0.91;
	Making font-lock-mode-hook buffer-local while locally let-bound!
Date: Tue, 27 Dec 2011 17:26:42 +0100

Katsumi Yamaoka <yamaoka <at> jpl.org> writes:

> Wolfgang Jenkner wrote:
>> -(defvar font-lock-mode-hook)
>
> Why it is defvar'd here is that it no longer exists in Emacs but
> still exists in XEmacs.

Well, it doesn't exist anymore but it still works (and is used, e.g., in
c-mode) in Emacs as well (as a consequence of font-lock-mode being
defined via define-minor-mode).

> Gnus should run with not only old Emacsen but also XEmacsen[1],
> so please don't scrap it.  (when (featurep 'xemacs) ...?

There's also the problem that setting (or binding) font-lock-mode-hook
to nil prevents other (perhaps essential) functions on this hook from
running as well.  So, here "to scrap" really means "to honour" ;-)

Thank you for the explanation!

Wolfgang

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