From: "Davis Herring" <herring@lanl.gov>
To: "David Kastrup" <dak@gnu.org>
Cc: Juanma Barranquero <lekktu@gmail.com>, Emacs Devel <emacs-devel@gnu.org>
Subject: Re: unload-feature questions and thoughts
Date: Thu, 11 Oct 2007 09:41:21 -0700 (PDT) [thread overview]
Message-ID: <58956.128.165.123.18.1192120881.squirrel@webmail.lanl.gov> (raw)
In-Reply-To: <858x6atas5.fsf@lola.goethe.zz>
>> So I think that the evidence is for the intuitively obvious
>> statement that no one knows how to use the hook. I found no
>> examples where the normal heuristics would break anything, although
>> neither did I find any examples where the unload-hook actually broke
>> things by suppressing the "normal heuristics". So I think treating
>> it as a bug is probably the right thing to do for simplicity: just
>> do the heuristics regardless, and let the rare hooks that really
>> need to suppress them kill the variable bound for that purpose.
>
> Have you checked AUCTeX's loadup/startup sequence? It uses the unload
> hooks in order to offer a way of selectively disabling autoloaded
> parts. While the "no one knows" is somewhat accurate (it was a
> combination of reverse engineering and trial and error to make me
> understand the implications), it is likely not true that nothing will
> break by changes in that area where external packages are concerned.
First, a correction to my message and in particular the summary you
quoted: delsel.el did break things with its unload-hook, since (at least
in the current buffer) it would otherwise have had its pre-command-hook
entry removed, but as it stands that will just error out immediately after
the unload. (From this I note that buffers should be swept for local hook
values as well as local variable values.)
Second, I just looked at the one "unload-hook" I found (in
tex-site.el.in), and it seems to just be manipulating `after-load-alist'
(though it forgets to setq it at the end) and `load-path'. So it too
would benefit from having the normal heuristics applied (in case the user
put random AUCTeX functions on hooks). Am I missing something?
Davis
--
This product is sold by volume, not by mass. If it appears too dense or
too sparse, it is because mass-energy conversion has occurred during
shipping.
next prev parent reply other threads:[~2007-10-11 16:41 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-02-04 18:03 unload-feature questions and thoughts Juanma Barranquero
2007-02-04 18:32 ` David Kastrup
2007-02-04 19:07 ` Juanma Barranquero
2007-02-04 19:14 ` David Kastrup
2007-02-05 0:10 ` Juanma Barranquero
2007-02-05 7:21 ` David Kastrup
2007-02-05 9:21 ` Juanma Barranquero
2007-02-05 9:32 ` David Kastrup
2007-02-05 11:08 ` Juanma Barranquero
2007-02-05 11:16 ` David Kastrup
2007-02-05 11:40 ` Juanma Barranquero
2007-02-06 0:16 ` Richard Stallman
2007-10-10 11:04 ` Juanma Barranquero
2007-10-10 14:52 ` Davis Herring
2007-10-10 16:08 ` Juanma Barranquero
2007-10-10 17:03 ` Davis Herring
2007-10-10 17:07 ` Juanma Barranquero
2007-10-10 17:56 ` Davis Herring
2007-10-11 5:20 ` Richard Stallman
2007-10-11 6:39 ` David Kastrup
2007-10-11 15:16 ` Juanma Barranquero
2007-10-12 15:59 ` Richard Stallman
2007-10-12 17:01 ` Juanma Barranquero
2007-10-13 6:41 ` Richard Stallman
2007-10-13 10:03 ` Juanma Barranquero
2007-10-14 16:28 ` Richard Stallman
2007-10-14 22:34 ` Juanma Barranquero
2007-10-15 16:03 ` Richard Stallman
2007-10-15 16:22 ` Juanma Barranquero
2007-10-16 4:10 ` Richard Stallman
2007-10-16 8:15 ` Juanma Barranquero
2007-10-17 5:02 ` Richard Stallman
2007-10-17 23:39 ` Juanma Barranquero
2007-10-23 19:27 ` Davis Herring
2007-10-24 8:32 ` Richard Stallman
2007-10-11 16:41 ` Davis Herring [this message]
2007-10-12 2:46 ` Richard Stallman
2007-10-25 21:24 ` David Kastrup
2007-10-28 13:51 ` Richard Stallman
2007-10-10 21:03 ` Richard Stallman
2007-10-10 21:42 ` Juanma Barranquero
2007-02-05 19:10 ` Richard Stallman
2007-02-05 23:27 ` Juanma Barranquero
2007-02-06 17:09 ` Richard Stallman
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