From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: "H. Dieter Wilhelm" Newsgroups: gmane.emacs.bugs Subject: bug#60587: Patch for adding links to symbols' help documentation Date: Sun, 12 Feb 2023 12:04:36 +0100 Message-ID: <86mt5j87qz.fsf@duenenhof-wilhelm.de> References: <86y1qgr1bf.fsf@duenenhof-wilhelm.de> <86tu13qydg.fsf@duenenhof-wilhelm.de> <83h6x2u74b.fsf@gnu.org> <863588rfos.fsf@duenenhof-wilhelm.de> <83o7qw0yjy.fsf@gnu.org> <864jskx6a8.fsf@duenenhof-wilhelm.de> <831qnomh6l.fsf@gnu.org> <86wn5anw04.fsf@duenenhof-wilhelm.de> <86h6wboe2v.fsf@duenenhof-wilhelm.de> <86edr59bua.fsf@duenenhof-wilhelm.de> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="=-=-=" Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="21488"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Cc: Juri Linkov , Eli Zaretskii , "60587@debbugs.gnu.org" <60587@debbugs.gnu.org>, Drew Adams To: Stefan Monnier Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Sun Feb 12 12:05:24 2023 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 1pRAAe-0005OM-6l for geb-bug-gnu-emacs@m.gmane-mx.org; Sun, 12 Feb 2023 12:05:24 +0100 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pRAAK-0005sg-NG; Sun, 12 Feb 2023 06:05:04 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pRAAI-0005sY-It for bug-gnu-emacs@gnu.org; Sun, 12 Feb 2023 06:05:02 -0500 Original-Received: from debbugs.gnu.org ([209.51.188.43]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1pRAAI-0005wt-9Y for bug-gnu-emacs@gnu.org; Sun, 12 Feb 2023 06:05:02 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1pRAAH-0005iz-T7 for bug-gnu-emacs@gnu.org; Sun, 12 Feb 2023 06:05:01 -0500 X-Loop: help-debbugs@gnu.org Resent-From: "H. Dieter Wilhelm" Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sun, 12 Feb 2023 11:05:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 60587 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: patch Original-Received: via spool by 60587-submit@debbugs.gnu.org id=B60587.167619990021995 (code B ref 60587); Sun, 12 Feb 2023 11:05:01 +0000 Original-Received: (at 60587) by debbugs.gnu.org; 12 Feb 2023 11:05:00 +0000 Original-Received: from localhost ([127.0.0.1]:44141 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1pRAAF-0005ig-0p for submit@debbugs.gnu.org; Sun, 12 Feb 2023 06:05:00 -0500 Original-Received: from mout.kundenserver.de ([212.227.126.134]:40231) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1pRAAA-0005iM-P2 for 60587@debbugs.gnu.org; Sun, 12 Feb 2023 06:04:56 -0500 Original-Received: from ping ([109.250.145.221]) by mrelayeu.kundenserver.de (mreue012 [212.227.15.167]) with ESMTPSA (Nemesis) id 1MzkK9-1oeqla1X9d-00vepw; Sun, 12 Feb 2023 12:04:39 +0100 In-Reply-To: (Stefan Monnier's message of "Sat, 04 Feb 2023 22:54:00 -0500") X-Provags-ID: V03:K1:GX8EJuKwszqvHz2c63giLvDgH7dsZvZHlfUjpBhg54XdGr0YbIr 2im0p2cL0p8Rc7wYbrbyGotY4ttIkZmBhPk9ISq5E/M+xGsmcRgOFeanqSFGqmA6dqLQTnF C1g3Q+9jtK+U9AAG7Psi3BOTtrXBiV/98RttEAvLtN0z3JMhj7TnvokUV5xs7Dg80JsYLdf WiSV2VwO+kxksc5biK2rQ== UI-OutboundReport: notjunk:1;M01:P0:3xhZpIywUd8=;KuUz1iTeclm5L9d3BqWN7qcTdwR 2k9KmrYCVCRZZh3t5Maossx+GRaY3tLo6weGM2B3SyZ7jOuXXfyXBwgSerCkU+ACpx2JUIMQt Of0L/8R5e7KGnhqYURvFz3oaJemCKvjQpN1ztxlWs1B33KNm4kT9fbLdTsYzjTDO35iR0YWuo o3zz3cwAkUWVLRS/V2tNfqE0Geqc+lvZpDc3m+NGJ+196ANwmu8RDrTt45qhxuYoOWKqAbi2l OSBB+OUDGI8WblJF1AMhWmIFEgxQnLvBZ7jNC1wrPQ0cCgtEmUI1MbWt9mEhO26rSSQcAWLS2 o+GagZFW91wME8dNcIhyE+wr09DjREBOhWXxu8E4DOdev+fnZbmN1tdrKG5Cpjr1Ti1qv9MNx O5T6/OxGIvEO5XjNbix0Bj6VhR2ry2YZFadYZnJVtZYkJodX/ebaDMcDhzuJM52oB7wnVwQ0G 5DzKtzFfiiyaW1yrsy06eaFIWa3OrlianBV244MkXu8J4JcLXRr+kNOOgJYAdC9XCL/6IEnoQ /XpemtF4y1fDLoibIjpdpxYJzQ8sfMhI6Raril57EHQ5/apGLm5Eo8NalictdkC/5aDDbfP+4 wP9/cBMy2K+yYuvSf6e801bmSLGfaq+XRdiz4EhCnYzJRiONS/ZqdHdUCsIm2fWI6ytQbvI+0 aA13/9q3Sc+V6H+ld3LOguaoH616FK66N6KpZykNyZUgVlxKc4GwqRZC8Bvul78= 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:255396 Archived-At: --=-=-= Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Stefan Monnier writes: >> + (if (string=3D major-mode "Info-mode") > > `major-mode` contains a symbol, so better do (eq major-mode 'Info-mode). > This said, I don't know why you have that test. Any reason you're > worried about this being called from another buffer? No, not any longer =F0=9F=98=8A. In the meantime I mentioned the example of 'emacs-news-mode' also linking quoted symbols (and Info references) to their documentation. So 'info-link-to-help-mode' is now a local minor-mode which should work for any buffer. (I understood that it's supposed to be the default for all *info* buffers.) If all agree on this direction I'll adjust the Info documentation accordingly.. But then, doesn't it makes sense to develop such a universal mode independent of info.el, e.g. like a 'bug-reference-mode'? Thanks for your opinions --=-=-= Content-Type: text/x-diff; charset=utf-8 Content-Disposition: inline; filename=0001-Info-providing-buttons-on-quoted-symbols-bug-60587.patch Content-Transfer-Encoding: quoted-printable >From 7d8e1ce37b35a782430b985b0f7b54aa24377388 Mon Sep 17 00:00:00 2001 From: Dieter Wilhelm Date: Wed, 25 Jan 2023 22:00:57 +0100 Subject: [PATCH] Info providing buttons on quoted symbols (bug#60587) *lisp/info.el --- lisp/info.el | 450 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 450 insertions(+) diff --git a/lisp/info.el b/lisp/info.el index 035dff66e75..a7fa11e6a5c 100644 --- a/lisp/info.el +++ b/lisp/info.el @@ -5510,6 +5510,456 @@ info--manual-names Info-directory-list (mapcar #'car Info-suffix-list)))))))) =20 + +;;; Commentary: + +;; All code below provides buttons of symbols (functions, variables, +;; and faces) within Emacs' Info viewer linking to their builtin help +;; documentation. This linking is done when symbol names in texinfo +;; documentation (like the Emacs- and Elisp manual) are: + +;; 1. Quoted symbol names like `symbol-name'. + +;; 2. Function names which are prefixed by M-x, for example M-x +;; function-name or are quoted and prefixed, like `M-x function-name'. + +;; 3. Function names appearing behind the following forms, which +;; occur, for example, in the Elisp manual: (info "(elisp) Eval") + +;; -- Special Form: function-name +;; -- Command: ... +;; -- Function: ... +;; -- Macro: ... + +;; 4. And variables names behind the following text: + +;; -- User Option: variable-name +;; -- Variable: ... + +;; In any case all symbol names must be known to Emacs, which means it +;; is either a built-in, or its Lisp package is loaded for the current +;; Emacs session, or the symbol is auto-loaded. + +;; You can follow the additional links with the usual Info +;; keybindings. The customisation variable +;; `mouse-1-click-follows-link' is influencing the clicking behavior +;; (and tooltips) of the links, the variable's default is 450 (milli +;; seconds) setting it to nil means only clicking with mouse-2 is +;; following the link (hint: Drew Adams). + +;; The link color of symbols - referencing their builtin documentation +;; - is distinct from links which are referencing further Info +;; documentation. + +;; Below code is checking if Info documents are relevant Elisp and +;; Emacs related files to avoid false positives. Please see the +;; customization variable `info-none-emacs-or-elisp-documents'. + +;; The code uses mostly mechanisms from Emacs' lisp/help-mode.el file. + + +;;; Code: + +(require 'button) +(require 'cl-lib) +(require 'help-mode) +(require 'cl-seq) +(require 'subr-x) + +;;;###autoload +(define-minor-mode info-links-to-help-mode + "The mode creates buttons on symbols linking to their documentation stri= ng. +It shows their documentation in a *Help* buffers (in another +window) when typing or clicking `mouse-2' on the buttons. +These can be followed, as the regular Info manual references, +with \\[Info-next-reference] and \\[Info-prev-reference]. + +For details about which symbols are considered and the linking +process itself please see the function `info-make-links-to-help'." + :init-value nil + :lighter " Hlp" + :group 'info + :version "30.1" + ;;(if (eq major-mode 'Info-mode) + (if info-links-to-help-mode + (progn + (if (eq major-mode 'Info-mode) + ;; we need this under Info-mode because of the narrowed + ;; Info file + (add-hook 'Info-selection-hook 'info-make-links-to-help)) + (info-make-links-to-help)) ;for the current buffer + (with-silent-modifications + (if (eq major-mode 'Info-mode) + (remove-hook 'Info-selection-hook 'info-make-links-to-help)) + ;; TODO: for Info mode we need to remove buttons from the whole + ;; (unnarrowed) file! (Actually for all buffers under "Hlp" mode.. := -/) + (remove-list-of-text-properties (point-min) (point-max) + '(button category info-args)))) + ;;(setq info-links-to-help-mode nil) + ;;) + ) +;; No defcustom for variable i-l-t-h-m since it activates it for ALL +;; buffers when setting i-l-t-h-m to none-nil + +;; Activate the mode for all Info buffers +(add-hook 'Info-mode-hook 'info-links-to-help-mode) + +(defvar info-emacs-info-dir-content nil + "List of file names in Emacs' info directories. +It is used to check if the current info file `Info-current-file' +belongs to the Emacs and Elisp context. This variable will be +initialised when opening the first info file.") + +(defcustom info-none-emacs-or-elisp-documents + '("aarm2012" ; Ada manual from package "ada-ref-man", 2023 on Elpa + "aarm2020" ; Ada manual from package "ada-ref-man", 2023 on Elpa + "arm2012" ; Ada manual from package "ada-ref-man", 2023 on Elpa + "arm2020" ; Ada manual from package "ada-ref-man", 2023 on Elpa + "sicp" ; Structure and Interpretation of Computer Programs, + ; package "sicp" 2023 on Melpa arc= hive + ) + "List of documentation which is not related to GNU Emacs or Elisp. +As well as documents which should not be searched for linking to +help documentation, for more details please see +`info-check-docu-p'. The list must contain only the base name of +info files, e.g. without the file extension \".info\"." + :type '(repeat string) + :version "30.1" + :group 'info) + +(defun info-check-docu-p () + "Check if the current info file is relevant to Emacs or Elisp. +That means `Info-current-file' is either found in Emacs' info/ +directory or in `package-user-dir' and is not included in the +`info-none-emacs-or-elisp-documents' list." + ;; When initialising Info and `Info-mode-hook' is running there is + ;; not yet `Info-current-file' initialised + (when Info-current-file + (unless info-emacs-info-dir-content + (info-compile-emacs-info-dir-content)) + (let* ((ifile Info-current-file) ;I-c-f doesn't yield file suffices! + (ifi (file-name-nondirectory ifile)) + ;; Verify that checking pdir is redundant because Package + ;; adds info package folders to Info-directory-list + (pdir (when (boundp 'package-user-dir) + (expand-file-name + package-user-dir))) + (ifiles info-emacs-info-dir-content) + (ndocu info-none-emacs-or-elisp-documents) + (sufs (mapcar 'car Info-suffix-list)) + (vars (mapcar #'(lambda (x)(concat ifi x)) sufs)) + (emacsy (and ifile + (or (cl-intersection vars ifiles :test #'string=3D) + (when pdir (string-match pdir ifile))) + (not (assoc-string ifi ndocu))))) + (if emacsy + t)))) + +(defvar describe-symbol-backends) ;from help-mode.el +(defvar help-xref-following) ;dito + +(defvar-keymap info-button-map + :doc "Keymap used by buttons in Info buffers." + "RET" #'push-button + "" #'push-button + "" 'mouse-face + " " #'push-button + " " #'push-button) + +;; +;; Button types +;; + +;; Below parent button type `info' inherits Info's quoted symbol face +;; `Info-quoted'. Otherwise the buttons would inherit from +;; button.el's `link' face which looks identical to Info's links. But +;; I think it is helpful to distinguish between button link and cross +;; reference types because they react differently. +(define-button-type 'info + 'link t + 'follow-link t + 'face 'Info-quoted + 'keymap info-button-map + 'action #'info-button-action) + +(define-button-type 'info-function + :supertype 'info + 'info-function 'describe-function + 'help-echo (purecopy "mouse-2, RET: describe this function")) + +(define-button-type 'info-variable + :supertype 'info + 'info-function 'describe-variable + 'help-echo (purecopy "mouse-2, RET: describe this variable")) + +(define-button-type 'info-face + :supertype 'info + 'info-function 'describe-face + 'help-echo (purecopy "mouse-2, RET: describe this face")) + +(define-button-type 'info-symbol + :supertype 'info + 'info-function #'describe-symbol + 'help-echo (purecopy "mouse-2, RET: describe this symbol")) + +(define-button-type 'info-function-def + :supertype 'info + 'info-function (lambda (fun &optional file type) + (or file + (setq file (find-lisp-object-file-name fun type))) + (if (not file) + (message "Unable to find defining file") + (require 'find-func) + (when (eq file 'C-source) + (setq file + (help-C-file-name (indirect-function fun) 'fu= n))) + ;; Don't use find-function-noselect because it follows + ;; aliases (which fails for built-in functions). + (let ((location + (find-function-search-for-symbol fun type file= ))) + (pop-to-buffer (car location)) + (run-hooks 'find-function-after-hook) + (if (cdr location) + (goto-char (cdr location)) + (message "Unable to find location in file"))))) + 'help-echo (purecopy "mouse-2, RET: find function's definition")) + +(defun info-compile-emacs-info-dir-content () + "Build a list of file names from Emacs' info directories. +This function fills `info-emacs-info-dir-content' with files from +`Info-directory-list'." + (setq info-emacs-info-dir-content + (mapcar 'file-name-nondirectory + (directory-files + (car + ;; search for the main Emacs' info/ directory, when this + ;; function is called Info-directory-list is already + ;; initialised + (cl-member "[^.]emacs" Info-directory-list :test + 'string-match-p)) + ;; don't list "." and ".." + t "[^.]$")))) + +(defun info-button-action (button) + "Call BUTTON's help function." + (info-do-xref nil + (button-get button 'info-function) + (button-get button 'info-args))) + +(defun info-do-xref (_pos function args) + "Call the help cross-reference function FUNCTION with args ARGS. +Things are set up properly so that the resulting `help-buffer' has +a proper [back] button." + ;; There is a reference at point. Follow it. + (let ((help-xref-following nil)) + (apply + function (if (eq function 'info) + (append args (list (generate-new-buffer-name "*info*")))= args)))) + +(defun info-button (match-number type &rest args) + "Make a hyperlink for cross-reference text previously matched. +MATCH-NUMBER is the subexpression of interest in the last matched +regexp. TYPE is the type of button to use. Any remaining +arguments are passed to the button's info-function when it is +invoked. See `info-make-links-to-help'. Don't forget ARGS." + ;; Don't munge properties we've added, especially in some instances. + (unless (button-at (match-beginning match-number)) + (make-text-button (match-beginning match-number) + (match-end match-number) + 'type type 'info-args args))) + +(defvar info-symbol-context + '((variable . "variable\\|option") + (function . "function\\|command\\|call") + (face . "face") + ;; ignore symbols following this context type + (ignore . "symbol\\|program\\|property") + ;; function definitions in files + (definition . "source \\(?:code \\)?\\(?:of\\|for\\)")) + "This list helps to distinguish symbol types. +Words in info documentation preceding a (quoted) symbol are used +to distinguish variables, functions, faces and symbols. The +context information can also be used to ignore symbols because +there is no help documentation for them. The strings of the the +list are becoming part of `info-symbol-regexp'.") + +(defvar info-symbol-regexp + ;; better use purecopy? + (concat + "\\(" ; Context start + "\\<\\(" ; Contex type definition + (string-remove-suffix + "\\|" + (mapconcat + (lambda (x) (concat "\\(" (cdr x) "\\)\\|")) + info-symbol-context "")) + "\\)" ; Context type definition end + "[ \t\n]+" ; Separators to quoted symbols + "\\)?" ; End of context + ;; quoted symbol + "['`=E2=80=98]" ; opening quotes + ;; Note: Symbol starting with word-syntax character: + "\\(\\sw\\(\\sw\\|\\s_\\)+\\|`\\)" ; The symbol itself + "['=E2=80=99]" ; End quotes + ) + "The regular expression for matching symbols to their help documentation. +It is comprised of the symbol's context and the (quoted) symbol +name. The various groups of context regular expressions are +matched in `info-make-links-to-help' to distinct info buttons.") + +(defun info-check-type( type) + "Check if TYPE corresponds to the current search result. +The function is used in `info-make-links-to-help'." + (let* ((isc info-symbol-context) + (n 3) ;embedded within 2 groups + (l (+ 3 (length isc)))) + (while (and (not (eq type (caar isc) ) ) (< n l) ) + (setq n (1+ n)) + (setq isc (cdr isc))) + (match-string n))) + + +;;;###autoload +(defun info-make-links-to-help (&optional buffer) + "Parse and hyperlink quoted symbols in the given BUFFER. +BUFFER defaults to the current buffer if omitted or nil. Find +symbols and their context in an Info buffer and activate buttons +for linking to their documentation string with `info-button'. + +Symbols have the canonical (quoted) form `symbol-name' and the +type of reference may be disambiguated by the preceding word(s) +as compiled in `info-symbol-regexp'. For example: Symbol names +are receiving distinct variable buttons when preceeded by the +words \"variable\" or \"option\". + +Variables are also detected when their names follow below forms: + + -- User Option: variable-name + -- Variable: ... + +Function names are detected when prefixed by `M-x', for example +`M-x function-name' or are quoted and prefixed like `M-x +function-name'. + +Function names are detected, as well, when appearing behind the +following forms, which occur - for example - in the Elisp manual: + + -- Special Form: function-name + -- Command: ... + -- Function: ... + -- Macro: ... + +The linking is similar to mechanisms from lisp/help.el." + (interactive "b") ;asking for buffer name.. + (if (eq major-mode 'Info-mode) + (when (info-check-docu-p) + (with-current-buffer (or buffer (current-buffer)) + (save-excursion + (goto-char (point-min)) + (with-silent-modifications + (let ((case-fold-search t) + (inhibit-read-only t)) + (with-syntax-table emacs-lisp-mode-syntax-table + ;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; + ;; The following is for finding "quoted symbols" + (save-excursion + (while (re-search-forward info-symbol-regexp nil t) + ;; sym-group is the regexp group for the symbol name + (let* ((sym-group (+ 3 (length info-symbol-context))) + (data (match-string sym-group)) + (sym (intern-soft data))) + (if sym + (cond + ((info-check-type 'variable) + (and (or (boundp sym) + (get sym 'variable-documentation)) + (info-button sym-group 'info-variable s= ym))) + ((info-check-type 'function) + (and (fboundp sym) + (info-button sym-group 'info-function s= ym))) + ((info-check-type 'face) + (and (facep sym) + (info-button sym-group 'info-face sym))) + ((info-check-type 'ignore)) + ((info-check-type 'definition) + (info-button sym-group 'info-function-def sy= m)) + ;; for symbols + ((cl-some (lambda (x) (funcall (nth 1 x) sym)) + describe-symbol-backends) + (info-button sym-group 'info-symbol sym)))))= )) + ;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; + ;; See e.g.: (info "(elisp) Eval") + ;; Elisp manual -- Special Form: + ;; -- Command: + ;; -- Function: function-name function + ;; -- Macro: + (save-excursion + (while (re-search-forward + "-- \\(Special Form:\\|Command:\\|Function:\\|= Macro:\\) " + nil t) + (looking-at "\\(\\sw\\|\\s_\\)+") + (let ((sym (intern-soft (match-string 0)))) + (if (fboundp sym) + (info-button 0 'info-function sym))))) + ;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; + ;; -- User Option: + ;; -- Variable: variable-name + (save-excursion + (while (re-search-forward + "-- \\(User Option:\\|Variable:\\) " + nil t) + (looking-at "\\(\\sw\\|\\s_\\)+") + (let ((sym (intern-soft (match-string 0)))) + (if (boundp sym) + (info-button 0 'info-variable sym))))) + ;; M-x prefixed functions + (save-excursion + (while (re-search-forward + ;; Assume command name is only word and symbol + ;; characters to get things like `use M-x foo-= >bar'. + ;; Command required to end with word constitue= nt + ;; to avoid `.' at end of a sentence. + ;; "\\