Re: master 5c70ff9: New user option 'font-lock-ignore'

[Eli Zaretskii <eliz@gnu.org>]

> From: Augusto Stoffel <arstoffel@gmail.com>
> Cc: monnier@iro.umontreal.ca,  emacs-devel@gnu.org
> Date: Sat, 02 Apr 2022 13:18:40 +0200
> 
> >> The intention is that the user can write, for instance
> >> 
> >>     (setq font-lock-ignore '((prog-mode font-lock-*-face)))
> >> 
> >> and this will be equivalent to
> >> 
> >>     (setq font-lock-ignore '((prog-mode (pred (lambda (obj)
> >>                                                  (and (symbolp obj)
> >>                                                       (string-match-p
> >>                                                        "\\`font-lock-.*-face\\'"
> >>                                                        (symbol-name obj))))))))
> >> 
> >> Do you agree this is a sensible and convenient mini-language?  I guess
> >> Stefan liked the idea, at least :-).
> >
> > I understand the intent.  I'm saying that we should document this
> > "mini-language" in sufficient detail, so that Lisp programmers knew
> > how to use it.
> 
> Strictly speaking the docstring of 'font-lock-ignore' provides a
> complete specification of the mini-language; if not, it's a bug in the
> docstring.

So you want to support only the "*" wildcard and nothing else?

> >> Hum, I'm not sure I understand the fine-grained distinction your are
> >> making here.  font-lock.el speaks of "font lock keywords"; the thing
> >> that fontifies variable names with font-lock-variable-face would be a
> >> "font lock keyword" in that terminology.  I'm just following along the
> >> terminology.
> >
> > That terminology (if this is how you perceive it) is wrong, and I'm
> > about to change it to make that more clear.  font-lock-keywords are
> > not just keywords, they are rules for fontification.
> 
> I certainly agree that font-lock.el's use of "font-lock keyword" as a
> term for "rules for fontification" is a bit odd.  OTOH it's an
> established use.

That's a historic accident, AFAICT: originally we didn't support there
anything but keywords.