From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: npostavs@users.sourceforge.net Newsgroups: gmane.emacs.bugs Subject: bug#25154: 25.1; Bindings in cl-letf are in reverse order Date: Sat, 10 Dec 2016 13:14:54 -0500 Message-ID: <87bmwjejmp.fsf@users.sourceforge.net> References: <8737hwllow.fsf@gmail.com> <83zik4fdug.fsf@gnu.org> <87bmwjy80b.fsf@gmail.com> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: blaine.gmane.org 1481393652 27301 195.159.176.226 (10 Dec 2016 18:14:12 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Sat, 10 Dec 2016 18:14:12 +0000 (UTC) User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/25.1 (gnu/linux) Cc: 25154@debbugs.gnu.org To: Alex Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Sat Dec 10 19:14:08 2016 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1cFm9v-00068l-3p for geb-bug-gnu-emacs@m.gmane.org; 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Sat, 10 Dec 2016 10:13:52 -0800 (PST) Original-Received: from zony ([45.2.7.65]) by smtp.googlemail.com with ESMTPSA id n206sm1483895itg.1.2016.12.10.10.13.51 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Sat, 10 Dec 2016 10:13:52 -0800 (PST) In-Reply-To: <87bmwjy80b.fsf@gmail.com> (Alex's message of "Sat, 10 Dec 2016 12:05:40 -0600") X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 208.118.235.43 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.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.org gmane.emacs.bugs:126822 Archived-At: Alex writes: >> >> Isn't it true that the order of evaluation in a 'let' is unspecified? >> If you want a particular order, use 'let*'. > > I don't think so. See (info "(elisp) Local Variables"): > > All of the VALUE-FORMs in BINDINGS are evaluated in the order they > appear > > I believe it should follow for cl-letf. Besides, even if it was > unspecified, evaluating in the order they appear would be adhering to > the principle of least astonishment. The value forms are evaluated in order, the bindings are not necessarily in order. (let ((x 0)) (cl-letf ((a (setq x 1)) (a (setq x 2))) (list x a))) ;=> (2 1) Although `let' does happen to perform the bindings in order too. (let ((x 0)) (let ((a (setq x 1)) (a (setq x 2))) (list x a))) ;=> (2 2)