From: Stefan Monnier <monnier@IRO.UMontreal.CA>
To: Michael Heerdegen <michael_heerdegen@web.de>
Cc: emacs-devel@gnu.org
Subject: Re: Why is FUNC in cl-callf not allowed to be an expression?
Date: Fri, 10 May 2019 09:28:14 -0400 [thread overview]
Message-ID: <jwv7eayqw4z.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <87pnoqtuhm.fsf@web.de> (Michael Heerdegen's message of "Fri, 10 May 2019 13:32:53 +0200")
>> > (defmacro gv-callf (call &optional n)
>> > (gv-letplace (_getter setter) (nth (or n 1) call)
>> > (funcall setter call)))
>>
>> It's cute, tho I'm not too fond of specifying the place via a number,
>> personally,
>
> [I should use GETTER btw for more efficient code:
>
> (defmacro gv-callf (call &optional n)
> (unless n (setq n 1))
> (gv-letplace (getter setter) (nth n call)
> (setf (nth n call) getter)
> (funcall setter call)))
> ]
>
> Yes, but still better than having it as part of the macro name as in
> cl-callf2... I don't have any better idea currently. We could still
> extend cl-callf however.
While it doesn't solve the problem, while playing with it I noticed that
I'm less annoyed by the use of a number if I can put it first, as in:
(gv-callf 2
(append head (car x) (cdr x)))
I'm not sure I can say why, tho.
Stefan
next prev parent reply other threads:[~2019-05-10 13:28 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-09 21:52 Why is FUNC in cl-callf not allowed to be an expression? Michael Heerdegen
2019-05-10 0:47 ` Stefan Monnier
2019-05-10 11:32 ` Michael Heerdegen
2019-05-10 13:28 ` Stefan Monnier [this message]
2019-05-10 14:19 ` Stefan Monnier
2019-05-10 14:22 ` Stefan Monnier
2019-05-10 15:18 ` Michael Heerdegen
2019-05-13 16:47 ` Stefan Monnier
2019-05-14 12:36 ` Michael Heerdegen
2019-05-14 23:32 ` Michael Heerdegen
2019-05-15 2:02 ` Stefan Monnier
2019-05-15 16:38 ` Michael Heerdegen
2019-05-15 17:19 ` Michael Heerdegen
2019-05-16 2:18 ` Michael Heerdegen
2019-05-16 13:12 ` Stefan Monnier
2019-05-16 14:37 ` Michael Heerdegen
2019-05-16 15:09 ` Michael Heerdegen
2019-05-16 19:34 ` Stefan Monnier
2019-05-16 21:46 ` Michael Heerdegen
2019-05-16 23:06 ` Stefan Monnier
2019-05-17 22:53 ` Michael Heerdegen
2019-05-18 14:09 ` Stefan Monnier
2019-05-20 23:25 ` Michael Heerdegen
2019-05-21 2:01 ` Stefan Monnier
2019-05-21 2:47 ` Michael Heerdegen
2019-05-21 10:16 ` Noam Postavsky
2019-05-21 16:38 ` Michael Heerdegen
2019-05-21 17:38 ` Stefan Monnier
2019-05-21 7:26 ` Andy Moreton
2019-05-23 23:02 ` Michael Heerdegen
2019-05-22 1:00 ` Michael Heerdegen
2019-05-23 1:50 ` Michael Heerdegen
2019-05-23 3:38 ` Stefan Monnier
2019-05-23 23:38 ` Michael Heerdegen
2019-05-24 15:29 ` Stefan Monnier
2019-05-28 19:54 ` Michael Heerdegen
2019-05-27 0:20 ` Michael Heerdegen
2019-05-29 17:02 ` Stefan Monnier
2019-05-15 19:17 ` Michael Heerdegen
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
List information: https://www.gnu.org/software/emacs/
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=jwv7eayqw4z.fsf-monnier+emacs@gnu.org \
--to=monnier@iro.umontreal.ca \
--cc=emacs-devel@gnu.org \
--cc=michael_heerdegen@web.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this public inbox
https://git.savannah.gnu.org/cgit/emacs.git
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).