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From: Sean Whitton <spwhitton@spwhitton.name>
To: 73853@debbugs.gnu.org
Cc: Michael Heerdegen <michael_heerdegen@web.de>, monnier@iro.umontreal.ca
Subject: bug#73853: 31.0.50; and-let* is useless
Date: Sat, 19 Oct 2024 11:38:01 +0800	[thread overview]
Message-ID: <87froszrs6.fsf@melete.silentflame.com> (raw)
In-Reply-To: <87a5f2xir8.fsf@web.de> (Michael Heerdegen via's message of "Fri,  18 Oct 2024 04:11:23 +0200")

Hello,

On Fri 18 Oct 2024 at 04:11am +02, Michael Heerdegen via "Bug reports for GNU Emacs, the Swiss army knife of text editors" wrote:

> `and-let*'s purpose is to express conditions, `when-let*'s is
> conditional evaluation.  We have `and-let*' and `when-let*' for the
> same reason we have `and' and `when'.  See prior discussions.

Right.  The Lisp convention of using `when' for pure control flow and
`and' for returning values is a good aid to readability.

If we don't have and-let*, then we can't use this convention in the case
that we also want to bind variables.

So, I am very keen for and-let* to remain.

>> [ I think we have too many (if|when|and)-let(*) for our own good: we
>>   should pick some winners and deprecate the other ones.   ]
>
> AFAIR the non-star versions exist for backward compatibility only - so
> I would rather get rid of these.  Parallel existence of these non-star
> vs. star versions should be a temporary state, it complicates the
> matter for an epsilon gain.

Yes.  I would like us to move forward with removing the non-star ones.

I believe there was a previous attempt to deprecate them but it had to
be backed out.  But maybe now is the time to try again.

-- 
Sean Whitton





  parent reply	other threads:[~2024-10-19  3:38 UTC|newest]

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-10-17 16:27 bug#73853: 31.0.50; and-let* is useless Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-10-17 16:40 ` Drew Adams via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-10-18  2:11 ` Michael Heerdegen via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-10-18 23:42   ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-10-19  3:50     ` Michael Heerdegen via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-10-21  7:07     ` Augusto Stoffel
2024-10-21  8:57       ` Michael Heerdegen via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-10-21 12:09         ` Sean Whitton
2024-10-19  3:38   ` Sean Whitton [this message]
2024-10-20 12:24     ` Stefan Kangas
2024-10-22 14:47       ` bug#73853: 31.0.50; Should and-let* become a synonym for when-let*? Sean Whitton
2024-10-22 15:24         ` Michael Heerdegen via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-10-23 14:05           ` Stefan Kangas
2024-10-24  8:51             ` Sean Whitton
2024-10-25 12:09               ` Sean Whitton
2024-10-30  9:42                 ` Michael Albinus via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-10-26 19:25           ` Jim Porter
2024-10-27  7:08             ` Stefan Kangas
2024-10-27  9:16               ` Michael Heerdegen via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-10-27 10:12                 ` Michael Albinus via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-10-27 11:24                   ` Michael Heerdegen via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-10-27 11:32                     ` Sean Whitton
2024-10-27 11:44                     ` Michael Albinus via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-10-27 12:28                       ` Michael Heerdegen via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-10-27 13:10                         ` Sean Whitton
2024-10-27 13:22                         ` Michael Albinus via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-10-28  9:39                           ` Michael Heerdegen via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-10-27 14:41                 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-10-28 13:58                   ` Michael Heerdegen via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-10-28 14:32                     ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-10-27 20:00                 ` Drew Adams via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-10-28  2:15           ` Howard Melman
2024-10-28  3:19             ` Sean Whitton
2024-10-29 15:21 ` Jonas Bernoulli
2024-10-29 16:36   ` Drew Adams via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-10-30  0:49   ` Sean Whitton
2024-10-30 12:55   ` Corwin Brust

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