From: Michael Heerdegen <michael_heerdegen@web.de>
To: help-gnu-emacs@gnu.org
Subject: Re: Example use of macro to minimize and generalize the code
Date: Tue, 01 Jun 2021 16:02:13 +0200 [thread overview]
Message-ID: <87fsy1y97e.fsf@web.de> (raw)
In-Reply-To: <YLWMjXXMn2t3Fp5g@protected.localdomain> (Jean Louis's message of "Tue, 1 Jun 2021 04:25:33 +0300")
Jean Louis <bugs@gnu.support> writes:
> (defmacro when-tabulated-id (table &rest body)
> (declare (indent 2) (debug t))
> ;;(ignore id)
> `(if id
> (progn
> ,@body)
> (if (or (eq ,table 'any)
> (string-equal ,table rcd-current-table))
> (let ((id (tabulated-list-get-id)))
> (if id
> (progn ,@body)
> (message "Did not get ID")))
> (message "This function is for table `%s' only" ,table))))
Yes, better.
The downside now is that using the macro hides the fact that the code
depends on the id, and the resulting code is (still) hard to understand.
Why don't you consider to make the id a real argument?
Regards,
Michael.
next prev parent reply other threads:[~2021-06-01 14:02 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-30 22:48 Why is defun not executed during load-file? Drew Adams
2021-05-30 22:57 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-05-31 2:05 ` [External] : " Drew Adams
2021-05-31 2:56 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-05-31 5:05 ` Drew Adams
2021-05-31 19:20 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-05-31 19:47 ` Stefan Monnier via Users list for the GNU Emacs text editor
2021-05-31 20:09 ` Marcin Borkowski
2021-06-07 2:19 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-06-07 6:27 ` Jean Louis
2021-06-07 14:18 ` FW: " Drew Adams
2021-06-07 14:41 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-05-31 21:40 ` Example use of macro to minimize and generalize the code Jean Louis
2021-05-31 23:37 ` Michael Heerdegen
2021-05-31 23:59 ` Jean Louis
2021-06-01 0:34 ` Michael Heerdegen
2021-06-01 0:39 ` Jean Louis
2021-06-01 0:59 ` Michael Heerdegen
2021-06-01 1:25 ` Jean Louis
2021-06-01 14:02 ` Michael Heerdegen [this message]
2021-06-01 16:33 ` Jean Louis
2021-06-01 16:54 ` Yuri Khan
2021-06-01 17:24 ` Jean Louis
2021-06-01 17:57 ` Yuri Khan
2021-06-01 18:12 ` Jean Louis
2021-05-31 21:45 ` Example use of macro to minimize and generalize the code (2) Jean Louis
2021-05-31 21:48 ` [External] : Re: Why is defun not executed during load-file? Michael Heerdegen
2021-05-31 23:41 ` Drew Adams
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