GNU bug report logs - #58506
Use ".dir-locals.eld" and ".dir-locals-2.eld" when they exist

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Message #83 received at 58506 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: Philip Kaludercic <philipk <at> posteo.net>
Cc: 58506 <at> debbugs.gnu.org, Robert Pluim <rpluim <at> gmail.com>,
 Stefan Kangas <stefan <at> marxist.se>, Stefan Monnier <monnier <at> iro.umontreal.ca>,
 Juri Linkov <juri <at> linkov.net>
Subject: Re: bug#58506: Use ".dir-locals.eld" and ".dir-locals-2.eld" when
 they exist
Date: Sun, 16 Oct 2022 11:43:19 +0200

Philip Kaludercic <philipk <at> posteo.net> writes:

>> Yes, that's much better than my initial suggestion.  But I like the
>> safe-lisp approach better.
>
> ... why not both?  I can imagine that safe-lisp will take a while before
> it becomes usable, just because something like `safe-eval-p' has to be
> quite exhaustive, and at the very least handle all special forms.  Elisp
> isn't a Scheme so that means that a number of methods have to be
> implemented...

We're not in a hurry here.  😀  If we're aiming for a `safe-eval-p'
solution, then adding another syntax that will then be deprecated again
seems counter-productive.

But Stefan's syntax does look attractive, and allows both manual editing
and automatic editing, which a safe-lisp approach doesn't.  And the
safe-list approach also makes backwards compatibility more iffy -- if we
introduce `cond' in safe-lisp in Emacs 33, we'd still want the file to
not bug out in Emacs 32.

So safe-lisp would just have to ignore forms that are unknown to it,
which is less attractive than just ignoring

  (:some-new-thing ...)

in Stefan's syntax.

Uhm uhm hm.

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