From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Michael Heerdegen via "Bug reports for GNU Emacs, the Swiss army knife of text editors" Newsgroups: gmane.emacs.bugs Subject: bug#73853: 31.0.50; and-let* is useless Date: Fri, 18 Oct 2024 04:11:23 +0200 Message-ID: <87a5f2xir8.fsf@web.de> References: Reply-To: Michael Heerdegen Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="13871"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Cc: monnier@iro.umontreal.ca To: 73853@debbugs.gnu.org Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Fri Oct 18 04:11:58 2024 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1t1cT7-0003RX-GT for geb-bug-gnu-emacs@m.gmane-mx.org; 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envelope-from=michael_heerdegen@web.de; helo=mout.web.de X-Spam_score_int: -40 X-Spam_score: -4.1 X-Spam_bar: ---- X-Spam_report: (-4.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-1.277, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.bugs:293756 Archived-At: Stefan Monnier via "Bug reports for GNU Emacs, the Swiss army knife of text editors" writes: > Can we kill/deprecate this? `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. > [ 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. > I could see a use for something called `and-let(*)` but without a BODY, > for the purpose of remove a level of parens and indentation: > > (and-let* > (x1 (foo1)) > (x2 (foo2))) > > i.s.o > > (and-let* > ((x1 (foo1)) > (x2 (foo2)))) Ugh! - I could not imagine anything with more potential for confusion as removing the paren around a list of bindings. This would add one more year-lasting round of discussing these constructs. If you do this, please call it `and-let*?@!' so than everybody is warned. Michael.