GNU bug report logs - #40968
28.0.50; (apply nil)

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Message #128 received at 40968 <at> debbugs.gnu.org (full text, mbox):

From: Pip Cet <pipcet <at> gmail.com>
To: Drew Adams <drew.adams <at> oracle.com>
Cc: mattiase <at> acm.org, Eli Zaretskii <eliz <at> gnu.org>, 40968 <at> debbugs.gnu.org,
 stefan <at> marxist.se, npostavs <at> gmail.com
Subject: Re: bug#40968: 28.0.50; (apply nil)
Date: Tue, 02 Jun 2020 18:41:00 +0000

Drew Adams <drew.adams <at> oracle.com> writes:

>> We will not require minimum 2 args because that would be backward
>> incompatible.  I'm quite sure I already said that before.
>
> Yes, you did, as I indicated: "The only good
> case presented was to say that this would be
> an incompatible change."
>
> In expressing my non-inclusion in the purported
> "consensus", that's all I did.

Thank you for doing so. I think it's important to have a record of
whether a decision was reached by consensus or not, and I had wrongly
supposed this to be a case of the former. Sorry.

> My suggestion is to not only "recommend always
> passing 2 or more arguments" but to issue a
> warning when that's not the case.  And to
> deprecate that use (letting users know that at
> some point it might no longer be supported).

A first step towards that would be to change our existing Lisp code not
to use single-argument apply, which we could do in a follow-up patch.

> And (IMO) the reason given to users for the
> recommendation shouldn't be just because ("as")
> "the function works faster in that case".

I agree. I'll make another suggestion.

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