From: Katsumi Yamaoka <yamaoka@jpl.org>
Subject: Re: how to turn this Gnus function into a macro?
Date: Thu, 08 Jan 2004 12:47:39 +0900 [thread overview]
Message-ID: <b9ybrpf2jac.fsf@jpl.org> (raw)
In-Reply-To: <87k743qf5t.fsf@jbms.ath.cx>
>>>>> In <87k743qf5t.fsf@jbms.ath.cx>
>>>>> Jeremy Maitin-Shepard <jbms@attbi.com> wrote:
> (defmacro spam-fetch-field-fast (article field)
> "Fetch a field quickly, using the internal gnus-data-list function"
> (let ((macro (intern (concat "mail-header-" (symbol-name field)))))
> (if macro
> `(let ((article ,article))
> (if (numberp article)
> (let* ((header (assoc article (gnus-data-list nil)))
> (data-header (if header (gnus-data-header header))))
> (,macro data-header)))))))
Unfortunately, it dosn't work for all `field's.
(macroexpand '(spam-fetch-field-fast ART FIELD))
=> (let ((article ART))
(if (numberp article)
(let* ((header (assoc article (gnus-data-list nil)))
(data-header (if header (gnus-data-header header))))
(mail-header-FIELD data-header))))
BTW, (eval '(MACRO ARG)) can be used, however it is four times
slower than (MACRO ARG).
--
Katsumi Yamaoka <yamaoka@jpl.org>
next prev parent reply other threads:[~2004-01-08 3:47 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-01-07 22:19 Ted Zlatanov
2004-01-07 22:55 ` Jesper Harder
2004-01-08 0:09 ` Ted Zlatanov
2004-01-08 4:13 ` Jesper Harder
2004-01-08 2:13 ` Katsumi Yamaoka
2004-01-08 3:28 ` Ted Zlatanov
2004-01-08 3:33 ` Katsumi Yamaoka
2004-01-08 3:42 ` Jeremy Maitin-Shepard
2004-01-08 3:47 ` Katsumi Yamaoka [this message]
2004-01-08 4:06 ` Jeremy Maitin-Shepard
2004-01-08 6:06 ` Katsumi Yamaoka
2004-01-08 20:30 ` Ted Zlatanov
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