From: Mark Oteiza <mvoteiza@udel.edu>
To: emacs-devel@gnu.org
Cc: Stefan Monnier <monnier@iro.umontreal.ca>
Subject: Another pcase-lambda
Date: Mon, 18 Sep 2017 20:56:37 -0400 [thread overview]
Message-ID: <20170919005637.GA19322@holos.localdomain> (raw)
Hi,
I wrote the following, as I wanted more out of pcase-lambda. However,
pcase-lambda already exists so I don't know what to call it. It does
somewhat emulate SRFI-16's case-lambda.
(defmacro case-lambda (&rest spec)
"Return an arbitrary arity function."
(declare (indent 0) (debug (&rest (pcase-QPAT body))))
(let ((args (make-symbol "args")))
`(lambda (&rest ,args)
(pcase-exhaustive ,args ,@spec))))
(case-lambda
(`() t)
(`(,x) (cons x 1))
(`(,x ,y) (list :x x :y y))
(`(,x ,y . ,z) (vconcat (cons x (cons y z)))))
next reply other threads:[~2017-09-19 0:56 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-19 0:56 Mark Oteiza [this message]
2017-09-21 11:40 ` Another pcase-lambda Michael Heerdegen
2017-09-22 21:37 ` Mark Oteiza
2017-09-22 21:50 ` Clément Pit-Claudel
2017-09-23 14:25 ` Michael Heerdegen
2017-09-23 14:29 ` Stefan Monnier
2017-09-23 15:31 ` Michael Heerdegen
2017-09-28 21:11 ` Ted Zlatanov
2017-10-04 11:03 ` Michael Heerdegen
2017-10-04 16:12 ` Ted Zlatanov
2017-10-05 3:13 ` Stefan Monnier
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=20170919005637.GA19322@holos.localdomain \
--to=mvoteiza@udel.edu \
--cc=emacs-devel@gnu.org \
--cc=monnier@iro.umontreal.ca \
/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).