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Mattias Engdegård 26f735ff19 Add standard unmatchable regexp 
Add `regexp-unmatchable' as a standard unmatchable regexp, defined as
"\\`a\\`".  Use it where such a regexp is needed, replacing slower
expressions in several places.
From a suggestion by Philippe Schnoebelen.

* lisp/subr.el (regexp-unmatchable): New defconst.
* etc/NEWS (Lisp Changes): Mention `regexp-unmatchable'.
* doc/lispref/searching.texi (Regexp Functions): Document it.
* lisp/emacs-lisp/regexp-opt.el (regexp-opt)
* lisp/progmodes/cc-defs.el (cc-conditional-require-after-load)
(c-make-keywords-re)
* lisp/progmodes/cc-engine.el (c-beginning-of-statement-1)
(c-forward-<>-arglist-recur, c-forward-decl-or-cast-1)
(c-looking-at-decl-block)
* lisp/progmodes/cc-fonts.el (c-doc-line-join-re)
(c-doc-bright-comment-start-re)
* lisp/progmodes/cc-langs.el (c-populate-syntax-table)
(c-assignment-op-regexp)
(c-block-comment-ender-regexp, c-font-lock-comment-end-skip)
(c-block-comment-start-regexp, c-line-comment-start-regexp)
(c-doc-comment-start-regexp, c-decl-start-colon-kwd-re)
(c-type-decl-prefix-key, c-type-decl-operator-prefix-key)
(c-pre-id-bracelist-key, c-enum-clause-introduction-re)
(c-nonlabel-token-2-key)
* lisp/progmodes/cc-mode.el (c-doc-fl-decl-start, c-doc-fl-decl-end)
* lisp/progmodes/cc-vars.el (c-noise-macro-with-parens-name-re)
(c-noise-macro-name-re, c-make-noise-macro-regexps)
* lisp/progmodes/octave.el (octave-help-mode)
* lisp/vc/vc-bzr.el (vc-bzr-log-view-mode, vc-bzr-revision-completion-table)
* lisp/vc/vc-git.el (vc-git-log-view-mode)
* lisp/vc/vc-hg.el (vc-hg-log-view-mode)
* lisp/vc/vc-mtn.el (vc-mtn-log-view-mode):
Use `regexp-unmatchable'.
* lisp/textmodes/ispell.el (ispell-non-empty-string):
Use `regexp-unmatchable', fixing a broken never-match regexp.
2019-05-15 18:55:27 +02:00
..
advice.el Merge from origin/emacs-26 2018-12-31 17:57:29 -08:00
autoload.el * lisp/emacs-lisp/autoload.el (make-autoload): Don't add useless doc 2019-03-08 17:27:38 -05:00
avl-tree.el Update copyright year to 2019 2019-01-01 01:01:13 +00:00
backquote.el Update copyright year to 2019 2019-01-01 01:01:13 +00:00
backtrace.el Update more copyright years 2018-12-31 18:47:22 -08:00
benchmark.el Avoid some double-rounding of Lisp timestamps 2019-02-22 18:33:57 -08:00
bindat.el Merge from origin/emacs-26 2018-12-31 17:57:29 -08:00
byte-opt.el Optimize byte-compilation of proper-list-p 2019-04-12 14:25:36 +01:00
byte-run.el * lisp/emacs-lisp/byte-run.el (define-obsolete-variable-alias): Tweak doc 2019-04-19 23:29:33 -04:00
bytecomp.el Fix Bug#33618; define search path variables for grep, byte-compile 2019-04-25 15:49:38 -07:00
cconv.el * lisp/subr.el (prog2): Define as a macro 2019-04-02 10:04:44 -04:00
chart.el Fix regular-expression glitches and typos 2019-03-04 18:00:58 -08:00
check-declare.el Update copyright year to 2019 2019-01-01 01:01:13 +00:00
checkdoc.el Fix more regular expression typos 2019-03-18 17:02:29 -07:00
cl-extra.el Speed up cl-list-length 2019-02-18 14:52:37 -08:00
cl-generic.el Merge from origin/emacs-26 2018-12-31 17:57:29 -08:00
cl-indent.el Update copyright year to 2019 2019-01-01 01:01:13 +00:00
cl-lib.el * lisp/emacs-lisp/cl-lib.el (cl-endp): Move to cl-seq.el 2019-02-18 13:16:57 -05:00
cl-macs.el * lisp/emacs-lisp/cl-macs.el: Don't always inline struct functions 2019-04-02 12:24:52 -04:00
cl-preloaded.el Merge from origin/emacs-26 2018-12-31 17:57:29 -08:00
cl-print.el Merge from origin/emacs-26 2018-12-31 17:57:29 -08:00
cl-seq.el * lisp/emacs-lisp/cl-lib.el (cl-endp): Move to cl-seq.el 2019-02-18 13:16:57 -05:00
cl.el Update copyright year to 2019 2019-01-01 01:01:13 +00:00
copyright.el Omit/rewrite useless regexp repetitions 2019-04-12 19:43:41 -07:00
crm.el Merge from origin/emacs-26 2018-12-31 17:57:29 -08:00
cursor-sensor.el * lisp/emacs-lisp/cursor-sensor.el: Fix sensor behavior with overlays 2019-03-08 17:20:58 -05:00
debug.el Merge from origin/emacs-26 2019-02-20 12:07:22 -08:00
derived.el Merge from origin/emacs-26 2018-12-31 17:57:29 -08:00
disass.el Update copyright year to 2019 2019-01-01 01:01:13 +00:00
easy-mmode.el * easy-mmode.el: simplify via custom-current-group 2019-03-26 11:45:07 -04:00
easymenu.el Merge from origin/emacs-26 2018-12-31 17:57:29 -08:00
edebug.el * lisp/emacs-lisp/edebug.el: Better handle instrumentation of end-of-defun 2019-05-01 12:45:37 -04:00
eieio-base.el Merge from origin/emacs-26 2019-05-08 07:51:48 -07:00
eieio-compat.el Merge from origin/emacs-26 2018-12-31 17:57:29 -08:00
eieio-core.el Merge from origin/emacs-26 2018-12-31 17:57:29 -08:00
eieio-custom.el Update copyright year to 2019 2019-01-01 01:01:13 +00:00
eieio-datadebug.el Update copyright year to 2019 2019-01-01 01:01:13 +00:00
eieio-opt.el Fix regular-expression glitches and typos 2019-03-04 18:00:58 -08:00
eieio-speedbar.el Fix regular-expression glitches and typos 2019-03-04 18:00:58 -08:00
eieio.el Merge from origin/emacs-26 2018-12-31 17:57:29 -08:00
eldoc.el Merge from origin/emacs-26 2018-12-31 17:57:29 -08:00
elint.el Merge from origin/emacs-26 2018-12-31 17:57:29 -08:00
elp.el Merge from origin/emacs-26 2018-12-31 17:57:29 -08:00
ert-x.el Update copyright year to 2019 2019-01-01 01:01:13 +00:00
ert.el Avoid some double-rounding of Lisp timestamps 2019-02-22 18:33:57 -08:00
ewoc.el Merge from origin/emacs-26 2018-12-31 17:57:29 -08:00
faceup.el Update more copyright years 2018-12-31 18:47:22 -08:00
find-func.el Merge from origin/emacs-26 2018-12-31 17:57:29 -08:00
float-sup.el Update copyright year to 2019 2019-01-01 01:01:13 +00:00
generator.el * lisp/subr.el (prog2): Define as a macro 2019-04-02 10:04:44 -04:00
generic.el Merge from origin/emacs-26 2018-12-31 17:57:29 -08:00
gv.el Fix alist-get gv setter not returning VAL 2019-05-09 22:28:19 +02:00
helper.el Update copyright year to 2019 2019-01-01 01:01:13 +00:00
inline.el Merge from origin/emacs-26 2018-12-31 17:57:29 -08:00
let-alist.el Update copyright year to 2019 2019-01-01 01:01:13 +00:00
lisp-mnt.el Merge from origin/emacs-26 2018-12-31 17:57:29 -08:00
lisp-mode.el Merge from origin/emacs-26 2019-04-29 09:08:19 -07:00
lisp.el * lisp/emacs-lisp/lisp.el (insert-pair-alist): Turn defvar into defcustom. 2019-05-06 22:32:26 +03:00
macroexp.el Merge from origin/emacs-26 2018-12-31 17:57:29 -08:00
map-ynp.el Merge from origin/emacs-26 2018-12-31 17:57:29 -08:00
map.el * lisp/emacs-lisp/map.el (map-inplace): Fix the message of the error. 2019-03-27 10:23:08 +01:00
nadvice.el * nadvice.el: Add ourselves to package--builtin-versions 2019-04-08 15:36:18 -04:00
package-x.el Merge from origin/emacs-26 2018-12-31 17:57:29 -08:00
package.el * lisp/emacs-lisp/packages.el: Add all to package-check-signature 2019-05-12 13:03:24 -04:00
pcase.el Use memql instead of memq in pcase 2019-03-28 23:57:34 +01:00
pp.el Update copyright year to 2019 2019-01-01 01:01:13 +00:00
radix-tree.el * lisp/emacs-lisp/radix-tree.el (pcase-defmacro): Improve docstring 2019-04-19 23:31:59 -04:00
re-builder.el Update copyright year to 2019 2019-01-01 01:01:13 +00:00
regexp-opt.el Add standard unmatchable regexp 2019-05-15 18:55:27 +02:00
regi.el Update copyright year to 2019 2019-01-01 01:01:13 +00:00
ring.el Merge from origin/emacs-26 2018-12-31 17:57:29 -08:00
rmc.el Update copyright year to 2019 2019-01-01 01:01:13 +00:00
rx.el Disallow reversed char ranges in `rx' 2019-03-19 20:30:15 +01:00
seq.el * lisp/emacs-lisp/seq.el (seq-difference): Inverse a conditional for clarity. 2019-03-21 21:08:29 +01:00
shadow.el Merge from origin/emacs-26 2018-12-31 17:57:29 -08:00
smie.el * lisp/emacs-lisp/smie.el (smie-indent-comment-continue): Single-char case. 2019-04-19 23:51:21 -04:00
subr-x.el Improve replace-buffer-contents/replace-region-contents 2019-02-23 21:31:15 +01:00
syntax.el * lisp/emacs-lisp/syntax.el (syntax-propertize): ignore is like nil 2019-05-08 15:18:32 -04:00
tabulated-list.el Customize tabulated-list sort indicators 2019-03-15 11:08:01 +02:00
tcover-ses.el Merge from origin/emacs-26 2018-12-31 17:57:29 -08:00
tcover-unsafep.el Update copyright year to 2019 2019-01-01 01:01:13 +00:00
testcover.el Merge from origin/emacs-26 2018-12-31 17:57:29 -08:00
text-property-search.el Update more copyright years 2018-12-31 18:47:22 -08:00
thunk.el Merge from origin/emacs-26 2018-12-31 17:57:29 -08:00
timer-list.el * lisp/emacs-lisp/timer-list.el: Fix header-line alignment 2019-04-23 17:54:13 -04:00
timer.el Fix rescheduling timers after suspension 2019-04-24 18:13:04 +03:00
tq.el Update copyright year to 2019 2019-01-01 01:01:13 +00:00
trace.el Update copyright year to 2019 2019-01-01 01:01:13 +00:00
unsafep.el Move side-effect-free from unsafep.el to subr.el 2019-04-21 19:04:13 +01:00
warnings.el Merge from origin/emacs-26 2018-12-31 17:57:29 -08:00