From: "Basil L. Contovounesios" <contovob@tcd.ie>
To: akater <nuclearspace@gmail.com>
Cc: emacs-devel@gnu.org
Subject: Re: defmacro with built-in gensym declaration and initialization
Date: Wed, 20 Jan 2021 13:46:16 +0000 [thread overview]
Message-ID: <87turbiuvr.fsf@tcd.ie> (raw)
In-Reply-To: <87bldk6n2l.fsf@gmail.com> (akater's message of "Wed, 20 Jan 2021 08:15:46 +0000")
akater <nuclearspace@gmail.com> writes:
> I suggest extending ~defmacro~ to support ~&gensym~ keyword in its
> lambda list, for convenient declaration and initialization of gensyms.
[...]
> This ~&gensym~ facility eliminates the need for ~with-gensyms~ and
> ~once-only~ in cases when gensyms are created unconditionally by macro
> function (in Common Lisp parlance).
IMO, this minor convenience is insufficient motivation for
conflating/complicating a macro's global arglist, i.e. its arity,
calling convention, etc., with utilities for its local body. Is there
some other motivation? Am I missing something?
Why not provide handy gensym/once-only local conveniences for macro
authors instead (some of which already exist in one form or another,
e.g. macroexp-let2, inline-letevals, and org-with-gensyms)?
Thanks,
--
Basil
next prev parent reply other threads:[~2021-01-20 13:46 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-20 8:15 defmacro with built-in gensym declaration and initialization akater
2021-01-20 13:46 ` Basil L. Contovounesios [this message]
2021-01-20 15:09 ` Stefan Monnier
2021-01-20 16:47 ` Robin Tarsiger
2021-01-20 19:28 ` akater
2021-01-20 20:55 ` Basil L. Contovounesios
2021-01-21 19:34 ` akater
2021-01-21 20:50 ` Stefan Monnier
2021-01-21 20:50 ` Basil L. Contovounesios
2021-01-21 21:05 ` Stefan Monnier
2021-01-21 21:23 ` Basil L. Contovounesios
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=87turbiuvr.fsf@tcd.ie \
--to=contovob@tcd.ie \
--cc=emacs-devel@gnu.org \
--cc=nuclearspace@gmail.com \
/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).