Re: hi-lock-mode doesn't work with emacs -Q.

[Alan Mackenzie]

Hi, Stefan.

On Thu, Jun 07, 2007 at 09:22:40AM -0400, Stefan Monnier wrote:
> > How can font-lock-mode be t, whilst at the same time there is no
> > after-change function?

> Because font-lock-mode-internal is not enabled.

> > Is this some optimisation in Font Lock mode that only sets
> > after-change-functions when font-lock-keywords is non-nil?

> Yes.

> > hi-lock.el doesn't seem to be violating Font Lock's proper calling
> > conventions in any way.

> Indeed.  It's that the `font-lock-mode' function has changed meaning from
> Emacs-21 to Emacs-22.  I'm not yet sure how best to fix it.

How about always enabling the pertinent after-change function (there are
just two, now, aren't there?), and wrapping it in the test currently in
font-lock-default-function at the comment
  ;; Only do hard work if the mode has specified stuff in
  ;; `font-lock-defaults'.
?  The loss in performance for un-font-locked buffers will be
negligible, surely?

>         Stefan

-- 
Alan.