From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: oitofelix@gmail.com (Bruno =?UTF-8?Q?F=C3=A9lix?= Rezende Ribeiro) Newsgroups: gmane.emacs.bugs Subject: bug#10384: 23.2; Emacs Lisp Reference Manual - incorrect or unclear documentation about invocation condition of hooks pre-command-hook and post-command-hook Date: Tue, 27 Dec 2011 20:29:41 -0200 Message-ID: <87y5txhcmi.fsf@felix-laptop.gnung> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Trace: dough.gmane.org 1325062796 25693 80.91.229.12 (28 Dec 2011 08:59:56 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Wed, 28 Dec 2011 08:59:56 +0000 (UTC) To: 10384@debbugs.gnu.org Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Wed Dec 28 09:59:51 2011 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([140.186.70.17]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1RfpMP-00033L-EV for geb-bug-gnu-emacs@m.gmane.org; Wed, 28 Dec 2011 09:59:45 +0100 Original-Received: from localhost ([::1]:53808 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RfpMP-0000XV-3C for geb-bug-gnu-emacs@m.gmane.org; Wed, 28 Dec 2011 03:59:45 -0500 Original-Received: from eggs.gnu.org ([140.186.70.92]:58541) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RffUS-00053N-IV for bug-gnu-emacs@gnu.org; Tue, 27 Dec 2011 17:27:26 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1RffUQ-0006Uy-6I for bug-gnu-emacs@gnu.org; Tue, 27 Dec 2011 17:27:24 -0500 Original-Received: from debbugs.gnu.org ([140.186.70.43]:55165) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RffUQ-0006Ut-28 for bug-gnu-emacs@gnu.org; Tue, 27 Dec 2011 17:27:22 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.69) (envelope-from ) id 1RffX0-0007TP-AP for bug-gnu-emacs@gnu.org; Tue, 27 Dec 2011 17:30:02 -0500 X-Loop: help-debbugs@gnu.org Resent-From: oitofelix@gmail.com (Bruno =?UTF-8?Q?F=C3=A9lix?= Rezende Ribeiro) Original-Sender: debbugs-submit-bounces@debbugs.gnu.org Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Tue, 27 Dec 2011 22:30:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: report 10384 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: X-Debbugs-Original-To: bug-gnu-emacs@gnu.org Original-Received: via spool by submit@debbugs.gnu.org id=B.132502494628613 (code B ref -1); Tue, 27 Dec 2011 22:30:02 +0000 Original-Received: (at submit) by debbugs.gnu.org; 27 Dec 2011 22:29:06 +0000 Original-Received: from localhost ([127.0.0.1] helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1RffW5-0007RR-Dz for submit@debbugs.gnu.org; Tue, 27 Dec 2011 17:29:06 -0500 Original-Received: from eggs.gnu.org ([140.186.70.92]) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1RffW2-0007RJ-E1 for submit@debbugs.gnu.org; Tue, 27 Dec 2011 17:29:03 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1RffTP-0006QQ-Dy for submit@debbugs.gnu.org; Tue, 27 Dec 2011 17:26:21 -0500 Original-Received: from lists.gnu.org ([140.186.70.17]:60378) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RffTP-0006QL-CD for submit@debbugs.gnu.org; Tue, 27 Dec 2011 17:26:19 -0500 Original-Received: from eggs.gnu.org ([140.186.70.92]:58338) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RffTM-0004zY-J8 for bug-gnu-emacs@gnu.org; Tue, 27 Dec 2011 17:26:19 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1RffTJ-0006Om-E5 for bug-gnu-emacs@gnu.org; Tue, 27 Dec 2011 17:26:16 -0500 Original-Received: from mail-gx0-f169.google.com ([209.85.161.169]:50177) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RffTJ-0006Oe-9L for bug-gnu-emacs@gnu.org; Tue, 27 Dec 2011 17:26:13 -0500 Original-Received: by ggni2 with SMTP id i2so9537916ggn.0 for ; Tue, 27 Dec 2011 14:26:12 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=from:to:subject:date:message-id:user-agent:mime-version :content-type:content-transfer-encoding; bh=z8/K+WfJ2zYfTR7T5Kzdknkxdqp60MGNp9r89fEW2fo=; b=DEhBjA6JqUAYIlZNi11AFhNVW8wbJjK43ASYioFrdwvYNehs+G+WLxOn2OUt8d3XRd nwa8U8negISr17RzXomi3fCeCdqMeyG2Ngavbxh+nrSMZqN/rKXzK0+Hp6V6Zrw+jxx3 g8dhPEO+whnP0IY4bYbHNy3ocIIqRq5AImENw= Original-Received: by 10.101.95.20 with SMTP id x20mr12035906anl.83.1325024772790; Tue, 27 Dec 2011 14:26:12 -0800 (PST) Original-Received: from felix-laptop.gnung.gnung (189-93-178-131.3g.claro.net.br. [189.93.178.131]) by mx.google.com with ESMTPS id m14sm2198716anh.11.2011.12.27.14.26.05 (version=TLSv1/SSLv3 cipher=OTHER); Tue, 27 Dec 2011 14:26:11 -0800 (PST) User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.2 (gnu/linux) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 2) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 3) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.11 Precedence: list Resent-Date: Tue, 27 Dec 2011 17:30:02 -0500 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 2) X-Received-From: 140.186.70.43 X-Mailman-Approved-At: Wed, 28 Dec 2011 03:59:40 -0500 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-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:55243 Archived-At: In GNU Emacs Lisp Reference Manual, edition 3.0, bundled with GNU Emacs 23.2, section 21.1 (entitled "Command Loop Overview") which documents hooks `pre-command-hook' and `post-command-hook' describes them as follow: -- Variable: pre-command-hook The editor command loop runs this normal hook before each command. At that time, `this-command' contains the command that is about to run, and `last-command' describes the previous command. *Note Command Loop Info::. -- Variable: post-command-hook The editor command loop runs this normal hook after each command (including commands terminated prematurely by quitting or by errors), and also when the command loop is first entered. At that time, `this-command' refers to the command that just ran, and `last-command' refers to the command before that. But the same manual defines `command', in section 21.3 "Interactive Call", as follow: -- Function: commandp object &optional for-call-interactively Returns `t' if OBJECT is suitable for calling interactively; that is, if OBJECT is a command. Otherwise, returns `nil'. Interactively-callable objects include strings and vectors (which are treated as keyboard macros), lambda expressions that contain a top-level `interactive' form (*note Using Interactive::), byte-code function objects made from such lambda expressions, autoload objects that are declared as interactive (non-`nil' fourth argument to `autoload'), and some primitive functions. A symbol satisfies `commandp' if it has a non-`nil' `interactive-form' property, or if its function definition satisfies `commandp'. Keys and keymaps are not commands. Rather, they are used to look up commands (*note Keymaps::). If FOR-CALL-INTERACTIVELY is non-`nil', then `commandp' returns `t' only for objects that `call-interactively' could call--thus, not for keyboard macros. See `documentation' in *note Accessing Documentation::, for a realistic example of using `commandp'. Assume there are two interactively callable functions, `foo' and `bar' such that the former calls the last, and only the last, and the last don't calls anything else. When you call interactively `foo' pre-command-hook and post-command-hook, despite my expectation, runs only once. When I read the documentation I was pretty sure that it will run twice, one time to each command being called. The manual don't make clear that the above mentioned hooks only runs to interactive calls, but they says, in general manner, that it will run to every command. Unless this behavior is justified by the expression "The editor command loop runs", I guess there is a contradiction. But, in both cases, the manual seems unclear to me. The same occur to documentation of these variables. When I press `C-h v pre-command-hook ' I get Documentation: Normal hook run before each command is executed. If an unhandled error happens in running this hook, the hook value is set to nil, since otherwise the error might happen repeatedly and make Emacs nonfunctional. Already, when I press `C-h v post-command-hook ' I get Documentation: Normal hook run after each command is executed. If an unhandled error happens in running this hook, the hook value is set to nil, since otherwise the error might happen repeatedly and make Emacs nonfunctional. What makes you think these hooks runs even to commands called from interactively called commands, what isn't true. In GNU Emacs 23.2.1 (i486-pc-linux-gnu, GTK+ Version 2.20.0) of 2010-12-11 on raven, modified by Debian Windowing system distributor `The X.Org Foundation', version 11.0.10707000 configured using `configure '--build' 'i486-linux-gnu' '--build' 'i486-lin= ux-gnu' '--prefix=3D/usr' '--sharedstatedir=3D/var/lib' '--libexecdir=3D/us= r/lib' '--localstatedir=3D/var/lib' '--infodir=3D/usr/share/info' '--mandir= =3D/usr/share/man' '--with-pop=3Dyes' '--enable-locallisppath=3D/etc/emacs2= 3:/etc/emacs:/usr/local/share/emacs/23.2/site-lisp:/usr/local/share/emacs/s= ite-lisp:/usr/share/emacs/23.2/site-lisp:/usr/share/emacs/site-lisp:/usr/sh= are/emacs/23.2/leim' '--with-x=3Dyes' '--with-x-toolkit=3Dgtk' '--with-tool= kit-scroll-bars' 'build_alias=3Di486-linux-gnu' 'CFLAGS=3D-DDEBIAN -g -O2' = 'LDFLAGS=3D-g' 'CPPFLAGS=3D'' Important settings: value of $LC_ALL: nil value of $LC_COLLATE: nil value of $LC_CTYPE: nil value of $LC_MESSAGES: nil value of $LC_MONETARY: nil value of $LC_NUMERIC: nil value of $LC_TIME: nil value of $LANG: pt_BR.UTF-8 value of $XMODIFIERS: nil locale-coding-system: utf-8-unix default enable-multibyte-characters: t Major mode: Info Minor modes in effect: server-mode: t display-time-mode: t display-battery-mode: t desktop-save-mode: t tooltip-mode: t mouse-wheel-mode: t file-name-shadow-mode: t global-font-lock-mode: t font-lock-mode: t blink-cursor-mode: t auto-encryption-mode: t auto-compression-mode: t line-number-mode: t Recent input: d SPC l o o C-v=20 C-n C-n C-n C-n C-n C-n C-n C-e C-a M-< C-n C-n C-n=20 C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n=20 C-n C-n C-n C-n C-n C-p C-p M-{ M-{ M-{ M-} =20 =20 =20 =20 =20 =20 M-< =20 =20 =20 =20 =20 =20 =20 =20 =20 =20 =20 =20 u C-h C-g M-> C-h v p=20 r e - c o m m a n d - h o o k C-x 1 M-< M->=20 M-{ M-{ M-{ M-{ M-{ M-{ M-{ M-} M-{ t C-s p r e - c=20 o m m a n d - h o o k C-s C-s C-s C-s C-s C-s C-s =20 M-< M-< M-> M-> M-{ M-{ M-{ M-{ M-{ M-} C-x b =20 C-x b C-x b * C-g M-x m a k =20 - =20 r e p o r t Recent messages: Mark saved where search started Mark set [4 times] Quit Making completion list... Checking spelling of WHETER... ispell-overlay-window: Attempt to split minibuffer window Checking spelling of WHETER... ispell-overlay-window: Attempt to split minibuffer window Checking spelling of INVOCATION... INVOCATION is correct Load-path shadows: /usr/share/emacs23/site-lisp/emacs-jabber/jabber-ft-server hides /usr/share= /emacs/site-lisp/emacs-jabber/jabber-ft-server /usr/share/emacs23/site-lisp/emacs-jabber/jabber hides /usr/share/emacs/sit= e-lisp/emacs-jabber/jabber /usr/share/emacs23/site-lisp/emacs-jabber/jabber-sasl hides /usr/share/emac= s/site-lisp/emacs-jabber/jabber-sasl /usr/share/emacs23/site-lisp/emacs-jabber/jabber-version hides /usr/share/e= macs/site-lisp/emacs-jabber/jabber-version /usr/share/emacs23/site-lisp/emacs-jabber/jabber-history hides /usr/share/e= macs/site-lisp/emacs-jabber/jabber-history /usr/share/emacs23/site-lisp/emacs-jabber/jabber-activity hides /usr/share/= emacs/site-lisp/emacs-jabber/jabber-activity /usr/share/emacs23/site-lisp/emacs-jabber/jabber-export hides /usr/share/em= acs/site-lisp/emacs-jabber/jabber-export /usr/share/emacs23/site-lisp/emacs-jabber/jabber-ahc-presence hides /usr/sh= are/emacs/site-lisp/emacs-jabber/jabber-ahc-presence 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/emacs/site-lisp/emacs-jabber/jabber-si-client /usr/share/emacs23/site-lisp/emacs-jabber/jabber-core hides /usr/share/emac= s/site-lisp/emacs-jabber/jabber-core /usr/share/emacs23/site-lisp/emacs-jabber/jabber-presence hides /usr/share/= emacs/site-lisp/emacs-jabber/jabber-presence /usr/share/emacs23/site-lisp/emacs-jabber/jabber-muc-nick-completion hides = /usr/share/emacs/site-lisp/emacs-jabber/jabber-muc-nick-completion /usr/share/emacs23/site-lisp/emacs-jabber/jabber-bookmarks hides /usr/share= /emacs/site-lisp/emacs-jabber/jabber-bookmarks /usr/share/emacs23/site-lisp/emacs-jabber/jabber-util hides /usr/share/emac= s/site-lisp/emacs-jabber/jabber-util /usr/share/emacs/site-lisp/debian-startup hides /usr/share/emacs/23.2/site-= lisp/debian-startup /usr/share/emacs23/site-lisp/cedet-common/ezimage hides /usr/share/emacs/23= .2/lisp/ezimage /usr/share/emacs23/site-lisp/speedbar/dframe hides /usr/share/emacs/23.2/li= sp/dframe /usr/share/emacs23/site-lisp/speedbar/speedbar hides /usr/share/emacs/23.2/= lisp/speedbar /usr/share/emacs23/site-lisp/flim/md4 hides /usr/share/emacs/23.2/lisp/md4 /usr/share/emacs23/site-lisp/flim/sha1 hides /usr/share/emacs/23.2/lisp/sha1 /usr/share/emacs23/site-lisp/flim/hex-util hides /usr/share/emacs/23.2/lisp= /hex-util /usr/share/emacs23/site-lisp/speedbar/sb-image hides /usr/share/emacs/23.2/= lisp/sb-image /usr/share/emacs23/site-lisp/dictionaries-common/ispell hides /usr/share/em= acs/23.2/lisp/textmodes/ispell /usr/share/emacs23/site-lisp/dictionaries-common/flyspell hides /usr/share/= emacs/23.2/lisp/textmodes/flyspell /usr/share/emacs23/site-lisp/flim/ntlm hides /usr/share/emacs/23.2/lisp/net= /ntlm /usr/share/emacs23/site-lisp/flim/hmac-def hides /usr/share/emacs/23.2/lisp= /net/hmac-def /usr/share/emacs23/site-lisp/flim/sasl-cram hides /usr/share/emacs/23.2/lis= p/net/sasl-cram /usr/share/emacs23/site-lisp/flim/sasl hides /usr/share/emacs/23.2/lisp/net= /sasl /usr/share/emacs23/site-lisp/flim/sasl-digest hides /usr/share/emacs/23.2/l= isp/net/sasl-digest /usr/share/emacs23/site-lisp/flim/hmac-md5 hides /usr/share/emacs/23.2/lisp= /net/hmac-md5 /usr/share/emacs23/site-lisp/flim/sasl-ntlm hides /usr/share/emacs/23.2/lis= p/net/sasl-ntlm /usr/share/emacs23/site-lisp/eieio/chart hides /usr/share/emacs/23.2/lisp/e= macs-lisp/chart /usr/share/emacs23/site-lisp/eieio/eieio hides /usr/share/emacs/23.2/lisp/e= macs-lisp/eieio /usr/share/emacs23/site-lisp/emms/tq hides /usr/share/emacs/23.2/lisp/emacs= -lisp/tq /usr/share/emacs23/site-lisp/eieio/eieio-comp hides /usr/share/emacs/23.2/l= isp/emacs-lisp/eieio-comp /usr/share/emacs23/site-lisp/eieio/eieio-opt hides /usr/share/emacs/23.2/li= sp/emacs-lisp/eieio-opt /usr/share/emacs23/site-lisp/eieio/eieio-base hides /usr/share/emacs/23.2/l= isp/emacs-lisp/eieio-base /usr/share/emacs23/site-lisp/eieio/eieio-speedbar hides /usr/share/emacs/23= .2/lisp/emacs-lisp/eieio-speedbar /usr/share/emacs23/site-lisp/eieio/eieio-custom hides /usr/share/emacs/23.2= /lisp/emacs-lisp/eieio-custom /usr/share/emacs23/site-lisp/semantic/semantic hides /usr/share/emacs/23.2/= lisp/cedet/semantic /usr/share/emacs23/site-lisp/cedet-common/cedet hides /usr/share/emacs/23.2= /lisp/cedet/cedet /usr/share/emacs/23.2/site-lisp/ede/ede hides /usr/share/emacs/23.2/lisp/ce= det/ede /usr/share/emacs23/site-lisp/cedet-common/inversion hides /usr/share/emacs/= 23.2/lisp/cedet/inversion /usr/share/emacs23/site-lisp/cedet-common/mode-local hides /usr/share/emacs= /23.2/lisp/cedet/mode-local /usr/share/emacs23/site-lisp/cedet-common/cedet-files hides /usr/share/emac= s/23.2/lisp/cedet/cedet-files Features: (gnus-fun starttls mailalias smtpmail sendmail dictionary link connection newcomment ispell shadow bookmark pp emacsbug multi-isearch eieio-opt help-mode view flow-fill gnus-cite smiley ansi-color mail-extr gnus-async gnus-bcklg byte-opt bytecomp byte-compile gnus-ml disp-table parse-time utf-7 utf7 nnimap imap nndraft nnmh auth-source gnus-agent gnus-srvr gnus-score score-mode nnvirtual gnus-msg gnus-art mm-uu mml2015 epg-config mm-view smime dig nntp gnus-cache gnus-sum nnoo gnus-group gnus-undo nnmail mail-source format-spec gnus-start gnus-spec gnus-int gnus-range message ecomplete rfc822 mml mml-sec password-cache mm-decode mm-bodies mm-encode mail-parse rfc2231 rfc2047 rfc2045 qp ietf-drums mailabbrev gmm-utils mailheader canlock sha1 sha1-el hex-util hashcash gnus-win semantic-edit semantic-el semantic-bovine bovine-debug semantic-debug jka-compr sb-info info w3-auto espeak-key-bindings espeak-core espeak-customize espeak-elisp-facilities espeak joystick emms-lastfm emms-url url url-proxy url-privacy url-expand url-methods url-history url-cookie url-util url-parse timezone url-vars mailcap emms-browser sort emms-playlist-sort emms-score emms-player-xine emms-player-mpd tq emms-playing-time emms-lyrics emms-streams emms-mode-line emms-cache emms-info-ogginfo emms-info-mp3info emms-info later-do emms-playlist-mode emms-player-mplayer emms-player-simple emms-source-playlist emms-source-file dired regexp-opt emms-setup emms emms-compat edmacro kmacro windmove server gnus gnus-ems nnheader gnus-util netrc time-date mail-utils mm-util mail-prsvr time battery desktop cus-start cus-load cedet cedet-contrib-load speedbar-load semantic-load semantic-ia-sb semantic-analyze semantic-ctxt semantic-format semantic-cb semantic-sort semanticdb-find semanticdb-el semanticdb-search semantic-find semanticdb semantic-util-modes semantic-util semantic semantic-lex semantic-tag working fame semantic-fw mode-local find-func derived eieio-load ede-speedbar ede ede-load eieio-speedbar speedbar sb-image ezimage dframe easymenu assoc eieio-custom wid-edit ede-source eieio-base eieio cl cl-19 cogre-load cedet-load inversion ecb-autoloads debian-el debian-el-loaddefs w3m-wget w3m-load emms-auto jabber-autoloads emacs-goodies-el emacs-goodies-custom emacs-goodies-loaddefs easy-mmode cedet-autogen advice advice-preload autoload help-fns tooltip ediff-hook vc-hooks lisp-float-type mwheel x-win x-dnd font-setting tool-bar dnd fontset image fringe lisp-mode register page menu-bar rfn-eshadow timer select scroll-bar mldrag mouse jit-lock font-lock syntax facemenu font-core frame cham georgian utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao korean japanese hebrew greek romanian slovak czech european ethiopic indian cyrillic chinese case-table epa-hook jka-cmpr-hook help simple abbrev loaddefs button minibuffer faces cus-face files text-properties overlay md5 base64 format env code-pages mule custom widget hashtable-print-readable backquote make-network-process dbusbind system-font-setting font-render-setting gtk x-toolkit x multi-tty emacs) --=20 Bruno F=C3=A9lix Rezende Ribeiro (oitofelix) Ps: Please, let me know my english errors