From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Rafael D Sorkin Newsgroups: gmane.emacs.bugs Subject: bug#59872: cl-labels and cl-flet do not comply with the documentation Date: Wed, 7 Dec 2022 01:01:26 -0500 (EST) Message-ID: <20221207060126.21F713400241F@mn001.pi.local> Reply-To: Rafael D Sorkin Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="31987"; mail-complaints-to="usenet@ciao.gmane.io" Cc: Rafael D Sorkin To: 59872@debbugs.gnu.org Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Wed Dec 07 07:02:24 2022 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 1p2nVg-00088k-LS for geb-bug-gnu-emacs@m.gmane-mx.org; Wed, 07 Dec 2022 07:02:24 +0100 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1p2nVP-0004Xv-1w; 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Tue, 06 Dec 2022 22:01:27 -0800 (PST) Original-Received: from mail.perimeterinstitute.ca ([66.97.27.10]) by smtp-relay.gmail.com with ESMTPS id u2-20020a056638134200b0038a24fa60bbsm703142jad.18.2022.12.06.22.01.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 06 Dec 2022 22:01:27 -0800 (PST) X-Relaying-Domain: perimeterinstitute.ca Original-Received: from mn001.pi.local (unknown [10.10.21.100]) by mail.perimeterinstitute.ca (Postfix) with ESMTP id 3DCA83F08B; Wed, 7 Dec 2022 01:01:26 -0500 (EST) Original-Received: by mn001.pi.local (Postfix, from userid 1254) id 21F713400241F; Wed, 7 Dec 2022 01:01:26 -0500 (EST) X-Mailer: MH-E 8.6+git; nmh 1.7.1; GNU Emacs 26.3 Received-SPF: pass client-ip=2607:f8b0:4864:20::d64; envelope-from=rsorkin@perimeterinstitute.ca; helo=mail-io1-xd64.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 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, RCVD_IN_DNSWL_NONE=-0.0001, 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:250163 Archived-At: Hi, The documentation that I received along with emacs 28.2 says about `cl-flet' that "... the function body is enclosed in an implicit block as if by `cl-defun'". (This is from File: cl.info, Node: Function Bindings, Next: Macro Bindings, Prev: Dynamic Bindings, Up: Variable Bindings 4.3.2 Function Bindings -----------------------) I expected this behavior precisely because of the parallel with `cl-defun', as well as the connotation of the prefix "cl-" itself, which leads on to expect that `cl-flet' and `cl-labels' would act like their CL counterparts. However, as far as I can tell, neither of these functions actually creates an implicit named block, as claimed. Below is the evidence (from emacs 26.3, but 28.2 is similar). One sees that only `flet' works, but it has been declared as "obsolete". Thanks, Rafael emacs-version ; 26.3 (require 'cl-lib) ; cl-lib (flet ((tester () (return-from tester 3))) (tester)) ; 3 (labels ((tester () (return-from tester 3))) (tester)) ; No catch for tag: --cl-block-tester--, 3 (cl-flet ((tester () (return-from tester 3))) (tester)) ; No catch for tag: --cl-block-tester--, 3 (cl-labels((tester () (return-from tester 3))) (tester)) ; No catch for tag: --cl-block-tester--, 3 (Macroexpand '(cl-labels ((tester () (return-from tester 3))))) ; (let (#:--cl-tester--) (setq #:--cl-tester-- (function (lambda nil (throw (quote --cl-block-tester--) 3))))) (Macroexpand '(cl-flet ((tester () (return-from tester 3))))) ; (let* ((#:--cl-tester-- (cl-function (lambda nil (return-from tester 3))))) (progn)) (Macroexpand '(labels ((tester () (return-from tester 3))))) ; (progn (defvar #:--cl---cl-tester----) (let ((#:--cl---cl-tester---- nil)) (let* ((#:v (quote #:--cl---cl-tester----))) (set #:v (function (lambda nil (throw (quote --cl-block-tester--) 3))))))) (Macroexpand '(flet ((tester () (return-from tester 3))))) ; (let* ((#:vnew (cl-function (lambda nil (cl-block tester (return-from tester 3))))) (#:old (symbol-function (quote tester)))) (unwind-protect (fset (quote tester) #:vnew) (fset (quote tester) #:old))) ~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~- Rafael Sorkin Perimeter Institute for Theoretical Physics 31 Caroline Street North Waterloo, ON N2L 2Y5 Canada ~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-