[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: unload-feature questions and thoughts
From: |
Davis Herring |
Subject: |
Re: unload-feature questions and thoughts |
Date: |
Thu, 11 Oct 2007 09:41:21 -0700 (PDT) |
User-agent: |
SquirrelMail/1.4.8-6.el3.2lanl |
>> 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.
- Re: unload-feature questions and thoughts, (continued)
- Re: unload-feature questions and thoughts, Richard Stallman, 2007/10/14
- Re: unload-feature questions and thoughts, Juanma Barranquero, 2007/10/14
- Re: unload-feature questions and thoughts, Richard Stallman, 2007/10/15
- Re: unload-feature questions and thoughts, Juanma Barranquero, 2007/10/15
- Re: unload-feature questions and thoughts, Richard Stallman, 2007/10/16
- Re: unload-feature questions and thoughts, Juanma Barranquero, 2007/10/16
- Re: unload-feature questions and thoughts, Richard Stallman, 2007/10/17
- Re: unload-feature questions and thoughts, Juanma Barranquero, 2007/10/17
- Re: unload-feature questions and thoughts, Davis Herring, 2007/10/23
- Re: unload-feature questions and thoughts, Richard Stallman, 2007/10/24
- Re: unload-feature questions and thoughts,
Davis Herring <=
- Re: unload-feature questions and thoughts, Richard Stallman, 2007/10/11
- Re: unload-feature questions and thoughts, David Kastrup, 2007/10/25
- Re: unload-feature questions and thoughts, Richard Stallman, 2007/10/28
Re: unload-feature questions and thoughts, Richard Stallman, 2007/10/10