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Re: add-hook versus custom-set-variables
From: |
Stefan Monnier |
Subject: |
Re: add-hook versus custom-set-variables |
Date: |
Thu, 29 Dec 2005 11:14:49 -0500 |
User-agent: |
Gnus/5.11 (Gnus v5.11) Emacs/22.0.50 (gnu/linux) |
>>> Two workarounds which aren't pretty are to insist that the user add a
>>> defvar in .emacs for any hook he customizes
>>
>> I don't understand what you're suggesting here.
>> How could a defvar in .emacs help?
> Please read Luc's article where he describes the technique and why.
> http://article.gmane.org/gmane.emacs.pretest.bugs/9993
Oh, I see. It's not specific to defvar: setq works just as well.
>>> ;; MH-E hooks
>>> (eval-after-load 'mh-customize
>>> (progn
>>> (message "Adding mailcrypt hooks to MH-E...")
>>> (add-hook 'mh-folder-mode-hook 'mc-install-read-mode)
>>> (add-hook 'mh-letter-mode-hook 'mc-install-write-mode)))
>>
>> eval-after-load is a function, not a macro. I know it's counter
>> intuitive.
> I don't know enough about the internals to know why this would be
> counter-intuitive. I read your answer as: macros do what you expect,
> functions don't. Please elaborate if this is not what you mean. Why
> doesn't eval-after-load do what I expect?
The evaluation of a form (A B C) can follow the following two paths:
- if it's a macro:
(eval (macrocall A B C))
- if it's a function
(funcall A (eval B) (eval C))
Note how a function cannot delay the evaluation of its arguments.
Stefan
Re: add-hook versus custom-set-variables, Bill Wohler, 2005/12/30
- Re: add-hook versus custom-set-variables, Stefan Monnier, 2005/12/30
- Re: add-hook versus custom-set-variables, Richard M. Stallman, 2005/12/31
- Re: add-hook versus custom-set-variables, David Kastrup, 2005/12/31
- Re: add-hook versus custom-set-variables, Chong Yidong, 2005/12/31
- Re: add-hook versus custom-set-variables, David Kastrup, 2005/12/31