Package: emacs;
Reported by: Ergus <spacibba <at> aol.com>
Date: Sun, 30 May 2021 20:27:01 UTC
Severity: wishlist
Found in version 28.0.50
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From: Ergus <spacibba <at> aol.com> To: 48752 <at> debbugs.gnu.org Subject: bug#48752: 28.0.50; Feature request: Hook hide-ifdef into font-lock Date: Sun, 30 May 2021 22:26:06 +0200
The use of hide-ifdef is a bit outdated and it requires to manually call: `M-x hide-ifdefs` to update the buffer #if 0 <CODE> #endif M-x hide-ifdef-mode M-x hide-ifdef-toggle-shadowing does not shadows/hides the region <CODE>. It requires to explicitly call: M-x hide-ifdefs. Then if we change #if 0 -> #if 1; the shadow does not disappears/appears either until we call: M-x hide-ifdefs again. This part may be automatized. Calling hide-ifdefs every time is annoying and unneeded. Vim and most of other editors already do the re-fontification automatically. So we can take that behavior as a good starting point. Emacs is smart enough to recognize when the user modifies a cpp-macro. And multi-line code highlight is simple like /* */ does... I think font lock already has all the functionalities we need to add this feature in a more dynamic way. But some time ago (2008) there was a message in the mailing list advising not to implement hide-ifdef with font-lock due to performance concerns... but I am not sure if those are applicable still today. In GNU Emacs 28.0.50 (build 28, x86_64-pc-linux-gnu, GTK+ Version 3.24.29, cairo version 1.17.4) of 2021-05-29 built on Ergus Repository revision: e3fc16fd71a46990503a71b11a2ad592e99d9edb Repository branch: master System Description: Arch Linux Configured using: 'configure --prefix=/home/ergo/.local/ --with-mailutils --with-json --with-x-toolkit=gtk3 --with-xft --with-wide-int --with-modules --with-cairo --with-harfbuzz --with-native-compilation' Configured features: ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ JPEG JSON LCMS2 LIBSYSTEMD LIBXML2 MODULES NATIVE_COMP NOTIFY INOTIFY PDUMPER PNG RSVG SECCOMP SOUND THREADS TIFF TOOLKIT_SCROLL_BARS X11 XDBE XIM XPM GTK3 ZLIB Important settings: value of $LANG: en_US.UTF-8 locale-coding-system: utf-8-unix Major mode: Lisp Interaction Minor modes in effect: global-auto-revert-mode: t xclip-mode: t yas-global-mode: t yas-minor-mode: t show-paren-mode: t repeat-mode: t flyspell-mode: t company-mode: t flycheck-mode: t counsel-mode: t ivy-mode: t electric-pair-mode: t composable-mark-mode: t composable-mode: t xterm-mouse-mode: t winner-mode: t save-place-mode: t which-key-mode: t override-global-mode: t delete-selection-mode: t savehist-mode: t global-display-fill-column-indicator-mode: t display-fill-column-indicator-mode: t global-display-line-numbers-mode: t display-line-numbers-mode: t eldoc-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-composition-mode: t auto-encryption-mode: t auto-compression-mode: t size-indication-mode: t column-number-mode: t line-number-mode: t transient-mark-mode: t Load-path shadows: /usr/share/emacs/site-lisp/cmake-mode hides /home/ergo/.emacs.d/elpa/cmake-mode-20210104.1831/cmake-mode /usr/share/emacs/site-lisp/notmuch-crypto hides /home/ergo/.emacs.d/elpa/notmuch-20210515.1210/notmuch-crypto /usr/share/emacs/site-lisp/notmuch-compat hides /home/ergo/.emacs.d/elpa/notmuch-20210515.1210/notmuch-compat /usr/share/emacs/site-lisp/notmuch-hello hides /home/ergo/.emacs.d/elpa/notmuch-20210515.1210/notmuch-hello /usr/share/emacs/site-lisp/notmuch hides /home/ergo/.emacs.d/elpa/notmuch-20210515.1210/notmuch /usr/share/emacs/site-lisp/notmuch-show hides /home/ergo/.emacs.d/elpa/notmuch-20210515.1210/notmuch-show /usr/share/emacs/site-lisp/notmuch-maildir-fcc hides /home/ergo/.emacs.d/elpa/notmuch-20210515.1210/notmuch-maildir-fcc /usr/share/emacs/site-lisp/coolj hides /home/ergo/.emacs.d/elpa/notmuch-20210515.1210/coolj /usr/share/emacs/site-lisp/notmuch-draft hides /home/ergo/.emacs.d/elpa/notmuch-20210515.1210/notmuch-draft /usr/share/emacs/site-lisp/notmuch-tree hides /home/ergo/.emacs.d/elpa/notmuch-20210515.1210/notmuch-tree /usr/share/emacs/site-lisp/notmuch-parser hides /home/ergo/.emacs.d/elpa/notmuch-20210515.1210/notmuch-parser /usr/share/emacs/site-lisp/notmuch-lib hides /home/ergo/.emacs.d/elpa/notmuch-20210515.1210/notmuch-lib /usr/share/emacs/site-lisp/notmuch-mua hides /home/ergo/.emacs.d/elpa/notmuch-20210515.1210/notmuch-mua /usr/share/emacs/site-lisp/notmuch-message hides /home/ergo/.emacs.d/elpa/notmuch-20210515.1210/notmuch-message /usr/share/emacs/site-lisp/notmuch-address hides /home/ergo/.emacs.d/elpa/notmuch-20210515.1210/notmuch-address /usr/share/emacs/site-lisp/notmuch-wash hides /home/ergo/.emacs.d/elpa/notmuch-20210515.1210/notmuch-wash /usr/share/emacs/site-lisp/notmuch-tag hides /home/ergo/.emacs.d/elpa/notmuch-20210515.1210/notmuch-tag /usr/share/emacs/site-lisp/notmuch-print hides /home/ergo/.emacs.d/elpa/notmuch-20210515.1210/notmuch-print /usr/share/emacs/site-lisp/notmuch-query hides /home/ergo/.emacs.d/elpa/notmuch-20210515.1210/notmuch-query /usr/share/emacs/site-lisp/notmuch-jump hides /home/ergo/.emacs.d/elpa/notmuch-20210515.1210/notmuch-jump /usr/share/emacs/site-lisp/notmuch-company hides /home/ergo/.emacs.d/elpa/notmuch-20210515.1210/notmuch-company /home/ergo/.emacs.d/elpa/transient-20210525.1141/transient hides /home/ergo/.local/share/emacs/28.0.50/lisp/transient Features: (shadow sort notmuch-company notmuch-lib notmuch-version notmuch-compat mm-view mml-smime smime dig mailcap mail-extr emacsbug message rmc puny rfc822 mml mml-sec epa derived epg epg-config gnus-util rmail rmail-loaddefs auth-source password-cache time-date mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums mm-util mail-prsvr mail-utils autorevert filenotify xclip yasnippet-snippets yasnippet thingatpt amx comp comp-cstr warnings s paren repeat flyspell-correct-ivy flyspell-correct flyspell ispell company-keywords company-gtags company-dabbrev-code company-dabbrev company-files company-semantic company-template company-capf company flycheck json map find-func subr-x dash counsel xdg xref project dired-x dired dired-loaddefs compile text-property-search comint ansi-color swiper ivy-avy avy ivy flx ivy-faces ivy-overlay colir color pcase term/tmux term/xterm xterm jka-compr elec-pair init composable composable-mark xt-mouse simple-16-theme winner ring saveplace diminish edmacro kmacro which-key advice configmail cl-extra help-mode use-package use-package-ensure use-package-delight use-package-diminish use-package-bind-key bind-key use-package-core disp-table delsel savehist easy-mmode display-fill-column-indicator display-line-numbers info ede/auto eieio-base cl-seq seq eieio byte-opt bytecomp byte-compile cconv eieio-core cl-macs gv eieio-loaddefs cl-loaddefs cl-lib tex-site rx slime-autoloads early-init iso-transl tooltip eldoc electric uniquify ediff-hook vc-hooks lisp-float-type mwheel term/x-win x-win term/common-win x-dnd tool-bar dnd fontset image regexp-opt fringe tabulated-list replace newcomment text-mode elisp-mode lisp-mode prog-mode register page tab-bar menu-bar rfn-eshadow isearch easymenu timer select scroll-bar mouse jit-lock font-lock syntax font-core term/tty-colors frame minibuffer cl-generic cham georgian utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao korean japanese eucjp-ms cp51932 hebrew greek romanian slovak czech european ethiopic indian cyrillic chinese composite charscript charprop case-table epa-hook jka-cmpr-hook help simple abbrev obarray cl-preloaded nadvice button loaddefs faces cus-face macroexp files window text-properties overlay sha1 md5 base64 format env code-pages mule custom widget hashtable-print-readable backquote threads dbusbind inotify lcms2 dynamic-setting system-font-setting font-render-setting cairo move-toolbar gtk x-toolkit x multi-tty make-network-process native-compile emacs) Memory information: ((conses 16 255105 10285) (symbols 48 18525 1) (strings 32 58700 7082) (string-bytes 1 2146750) (vectors 16 29784) (vector-slots 8 590763 10019) (floats 8 189 1037) (intervals 56 1022 0) (buffers 992 11))
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