From: Kevin Ryde <user42@zip.com.au>
Subject: cons* versus apply
Date: Thu, 21 Apr 2005 08:23:51 +1000 [thread overview]
Message-ID: <87ekd5gk94.fsf@zip.com.au> (raw)
cons* seems to mutate a list given to it from apply,
(define x '(1 2 (3 4)))
(apply cons* x)
x
=> (1 2 3 4)
New code not changing the rest arg:
SCM_DEFINE (scm_cons_star, "cons*", 1, 0, 1,
(SCM arg, SCM rest), "...")
#define FUNC_NAME s_scm_cons_star
{
SCM ret = SCM_EOL;
SCM *p = &ret;
SCM_VALIDATE_REST_ARGUMENT (rest);
for ( ; scm_is_pair (rest); rest = SCM_CDR (rest))
{
*p = scm_cons (arg, SCM_EOL);
p = SCM_CDRLOC (*p);
arg = SCM_CAR (rest);
}
*p = arg;
return ret;
}
_______________________________________________
Guile-devel mailing list
Guile-devel@gnu.org
http://lists.gnu.org/mailman/listinfo/guile-devel
reply other threads:[~2005-04-20 22:23 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
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=87ekd5gk94.fsf@zip.com.au \
--to=user42@zip.com.au \
/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).