From: Jean Abou Samra <jean@abou-samra.fr>
To: guile-user@gnu.org
Subject: Macro to prepend element to list
Date: Sat, 20 Mar 2021 15:24:30 +0100 [thread overview]
Message-ID: <7e1286e7-3135-7747-9e25-395ffab3362e@abou-samra.fr> (raw)
Hello,
I find myself frequently using the following macro:
(define-macro (prepend! thing lst)
`(set! ,lst (cons ,thing ,lst)))
Have I missed a module somewhere that does this kind of things?
At least, I couldn't find anything in SRFIs. It may also be the
case that this is too specific to certain non-functional usages
(LilyPond in my case).
Thanks in advance,
Jean Abou Samra
next reply other threads:[~2021-03-20 14:24 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-20 14:24 Jean Abou Samra [this message]
2021-03-20 16:04 ` Macro to prepend element to list Linus Björnstam
2021-03-20 17:05 ` Jean Abou Samra
2021-03-20 18:10 ` Linus Björnstam
2021-03-20 20:16 ` Jean Abou Samra
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/guile/
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=7e1286e7-3135-7747-9e25-395ffab3362e@abou-samra.fr \
--to=jean@abou-samra.fr \
--cc=guile-user@gnu.org \
/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.
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).