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bug#16915: 24.3.50; [ruby-mode] Comments in regexps using the extended s

From: Bozhidar Batsov
Subject: bug#16915: 24.3.50; [ruby-mode] Comments in regexps using the extended syntax are not font-locked properly
Date: Sat, 01 Mar 2014 15:31:06 +0200

In most editors/IDEs code like this

regexp = /
  start         # some text
  \s            # white space char
  (group)       # first group
  (?:alt1|alt2) # some alternation

will have the comments font-locked as comments, because comments are
allowed in the extended regexp literal syntax (/x). It would be nice
if this was taken into account in ruby-mode as well.

In GNU Emacs (x86_64-apple-darwin13.0.0, NS apple-appkit-1265.00)
 of 2014-01-27 on Bozhidars-MacBook-Pro.local
Windowing system distributor `Apple', version 10.3.1265
Configured using:
 `configure --prefix=/usr/local/Cellar/emacs/HEAD --without-dbus
 --without-gnutls --with-ns --disable-ns-self-contained'

Important settings:
  locale-coding-system: utf-8-unix

Major mode: Ruby

Minor modes in effect:
  ruby-tools-mode: t
  inf-ruby-minor-mode: t
  diff-auto-refine-mode: t
  subword-mode: t
  guru-mode: t
  erc-truncate-mode: t
  erc-spelling-mode: t
  erc-list-mode: t
  erc-menu-mode: t
  erc-autojoin-mode: t
  erc-ring-mode: t
  erc-networks-mode: t
  erc-pcomplete-mode: t
  erc-track-mode: t
  erc-match-mode: t
  erc-button-mode: t
  erc-fill-mode: t
  erc-stamp-mode: t
  erc-netsplit-mode: t
  erc-irccontrols-mode: t
  erc-noncommands-mode: t
  erc-move-to-prompt-mode: t
  erc-readonly-mode: t
  global-flycheck-mode: t
  flycheck-mode: t
  which-function-mode: t
  flx-ido-mode: t
  ido-ubiquitous-mode: t
  winner-mode: t
  global-undo-tree-mode: t
  undo-tree-mode: t
  whitespace-mode: t
  global-anzu-mode: t
  anzu-mode: t
  projectile-global-mode: t
  projectile-mode: t
  flyspell-mode: t
  volatile-highlights-mode: t
  global-hl-line-mode: t
  shell-dirtrack-mode: t
  recentf-mode: t
  savehist-mode: t
  show-smartparens-global-mode: t
  show-smartparens-mode: t
  smartparens-mode: t
  global-auto-revert-mode: t
  delete-selection-mode: t
  prelude-global-mode: t
  prelude-mode: t
  tooltip-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-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

Recent input:
' d SPC s u g g e s t SPC t h e SPC u s e SPC o f SPC 
t h e SPC ` <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> f SPC a SPC d i 
f f e r e n t SPC f a c e SPC t h a n SPC t h e SPC 
s t r i n g SPC f a c e SPC u s e d SPC o f <backspace> 
<backspace> f o r SPC t h e SPC l i t e r a i l <backspace> 
<backspace> l SPC i t s e l f , SPC b u t SPC e v e 
n SPC i t SPC w o u l d SPC b e SPC a n SPC i m p r 
o v e m e n t . SPC I SPC a s o <backspace> <backspace> 
l s o SPC t h i n k <return> t h a t SPC o n l y SPC 
v a l i d SPC m o d i f i e r s SPC s h o u l d SPC 
b e SPC c <backspace> f o n t SPC l o c k e d . SPC 
M-b M-b M-f C-d - C-x b <return> <return> % r / t e 
s t / i <help-echo> C-x b <return> C-p C-p C-p C-p 
C-p C-p C-p C-n C-p C-p C-a C-f C-d n C-n C-n C-e <return> 
$ <backspace> % r { t e s t } i C-n C-n C-n C-n C-n 
C-n C-n C-n C-n C-n C-p C-p C-p C-p C-p C-p C-p C-n 
C-n C-n C-n C-e C-c C-c y M-x r e p o r t <return>

Recent messages:
Wrote /Users/bozhidar/*message*-20140301-152412
Saving file /Users/bozhidar/projects/test.rb...
Wrote /Users/bozhidar/projects/test.rb
Mark set
Send this bug report to the Emacs maintainers? (y or n)  y
Mark set [2 times]
Sending via mail...

Load-path shadows:
/Users/bozhidar/.emacs.d/elpa/tabulated-list-20120406.2251/tabulated-list hides 

(shadow sort mail-extr emacsbug vc-annotate vc vc-dispatcher nxml-uchnm
rng-xsd xsd-regexp rng-cmpct edebug crm ielm hippie-exp markdown-mode
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eieio-opt speedbar sb-image ezimage dframe mule-util find-dired
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rfc2045 ietf-drums mailabbrev mail-utils gmm-utils mailheader pcvs-util
add-log executable vc-git lisp-mnt network-stream starttls tls cider
cider-mode cider-repl cider-eldoc clojure-test-mode cider-interaction
arc-mode archive-mode cider-client nrepl-client cider-util ewoc
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nxml-ns nxml-mode nxml-outln nxml-rap nxml-util nxml-glyph nxml-enc
xmltok prelude-web prelude-scss prelude-scheme prelude-ruby prelude-perl
prelude-org prelude-js prelude-erc erc-truncate erc-autoaway
erc-spelling erc-notify erc-log erc-list erc-menu erc-join erc-ring
erc-networks erc-pcomplete erc-track erc-match erc-button erc-fill
erc-stamp erc-netsplit erc-goodies erc erc-backend erc-compat
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esh-io esh-cmd esh-opt esh-ext esh-proc esh-arg eldoc esh-groups eshell
esh-module esh-mode esh-util re-builder whitespace browse-kill-ring
midnight ediff-merg ediff-wind ediff-diff ediff-mult ediff-help
ediff-init ediff-util ediff dired-x dired anzu projectile pkg-info
find-func grep compile s bookmark pp expand-region text-mode-expansions
er-basic-expansions expand-region-core expand-region-custom flyspell
ispell etags volatile-highlights hl-line windmove tramp-cache tramp-sh
tramp tramp-compat auth-source gnus-util mm-util mail-prsvr
password-cache tramp-loaddefs trampver shell pcomplete comint ansi-color
ring format-spec recentf tree-widget wid-edit savehist saveplace
diminish smartparens-config smartparens autorevert filenotify delsel
prelude-mode easy-mmode edmacro kmacro prelude-core epl advice help-fns
dash thingatpt prelude-ui zenburn-theme prelude-packages finder-inf
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grizzl-autoloads key-chord-autoloads logito-autoloads info easymenu
cl-macs gv move-text-autoloads pkg-info-autoloads puppet-mode-autoloads
rainbow-delimiters-autoloads request-autoloads rubocop-autoloads
volatile-highlights-autoloads yaml-mode-autoloads package cl cl-loaddefs
cl-lib time-date tooltip electric uniquify ediff-hook vc-hooks
lisp-float-type mwheel ns-win tool-bar dnd fontset image regexp-opt
fringe tabulated-list newcomment lisp-mode prog-mode register page
menu-bar rfn-eshadow timer select scroll-bar 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 minibuffer nadvice
loaddefs button faces cus-face macroexp files text-properties overlay
sha1 md5 base64 format env code-pages mule custom widget
hashtable-print-readable backquote make-network-process cocoa ns
multi-tty emacs)

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