From: Stefan Monnier <monnier@iro.umontreal.ca>
To: "Drew Adams" <drew.adams@oracle.com>
Cc: emacs-devel@gnu.org
Subject: Re: Should nil COLLECTION element mean a "nil" candidate forcompleting-read? Alist doc.
Date: Tue, 21 Jul 2009 11:48:15 -0400 [thread overview]
Message-ID: <jwv8wiiavkb.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <F200758EA0274C149A585390BF271A96@us.oracle.com> (Drew Adams's message of "Mon, 20 Jul 2009 20:40:30 -0700")
> I forgot to point out that treating nil this way can lead to extra
> (ugly) code, just to remove or prevent production of such nil entries,
> so they are not available to the user.
A completion table can be a list of strings, a list of conses where the
car is a string, an obarry, a hashtable, or a function. Your "table" is
none of those, so it's invalid. Adding (delq nil ...) before passing
that table to the completion functions doesn't seem like a big issue.
> IOW, I suspect that the number of times where this "feature" might be
> useful (for what?) is less than the number of times where it is
> a nuisance.
It's not a feature.
Stefan
next prev parent reply other threads:[~2009-07-21 15:48 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-07-21 3:20 Should nil COLLECTION element mean a "nil" candidate for completing-read? Alist doc Drew Adams
2009-07-21 3:40 ` Should nil COLLECTION element mean a "nil" candidate forcompleting-read? " Drew Adams
2009-07-21 15:48 ` Stefan Monnier [this message]
2009-07-22 0:07 ` Should nil COLLECTION element mean a "nil" candidateforcompleting-read? " Drew Adams
2009-07-22 3:15 ` Stefan Monnier
2009-07-21 13:23 ` Should nil COLLECTION element mean a "nil" candidate for completing-read? " Stefan Monnier
2009-07-21 14:51 ` Drew Adams
2009-07-21 15:55 ` Stefan Monnier
2009-07-22 0:07 ` Drew Adams
2009-07-22 3:24 ` Stefan Monnier
2009-07-28 4:26 ` Kevin Rodgers
2009-07-21 23:22 ` Johan Bockgård
2009-07-22 0:07 ` Should nil COLLECTION element mean a "nil" candidate forcompleting-read? " Drew Adams
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