1 GNU Emacs NEWS -- history of user-visible changes.
3 Copyright (C) 2014-2015 Free Software Foundation, Inc.
4 See the end of the file for license conditions.
6 Please send Emacs bug reports to bug-gnu-emacs@gnu.org.
7 If possible, use M-x report-emacs-bug.
9 This file is about changes in Emacs version 25.
11 See files NEWS.24, NEWS.23, NEWS.22, NEWS.21, NEWS.20, NEWS.19, NEWS.18,
12 and NEWS.1-17 for changes in older Emacs versions.
14 You can narrow news to a specific version by calling `view-emacs-news'
15 with a prefix argument or by typing C-u C-h C-n.
18 +++ indicates that all necessary documentation updates are complete.
19 (This means all relevant manuals in doc/ AND lisp doc-strings.)
20 --- means no change in the manuals is needed.
21 When you add a new item, use the appropriate mark if you are sure it applies,
22 otherwise leave it unmarked.
25 * Installation Changes in Emacs 25.1
28 ** Building Emacs now requires C99 or later.
30 ** Building Emacs now requires GNU make, version 3.81 or later.
32 ** New configure option --with-cairo.
33 Maybe add text based on http://lists.gnu.org/archive/html/emacs-devel/2015-05/msg00689.html
35 ** By default, Emacs no longer works on IRIX. We expect that Emacs
36 users are not affected by this, as SGI stopped supporting IRIX in
37 December 2013. If you are affected, please send a bug report. You
38 should be able to work around the problem either by porting the Emacs
39 undumping code to GCC under IRIX, or by configuring --with-wide-int,
40 or by sticking with Emacs 24.4.
42 ** The Emacs garbage collector assumes GC_MARK_STACK == GC_MAKE_GCPROS_NOOPS.
43 The GC_MAKE_GCPROS_NOOPS stack-marking variant has been the default
44 since Emacs 24.4, and the other variants were undocumented and were
45 obstacles to maintenance and development. GC_MARK_STACK and its
46 related symbols have been removed from the C internals.
48 ** 'configure' now prefers gnustep-config when configuring GNUstep.
49 If gnustep-config is not available, the old heuristics are used.
52 ** 'configure' now prefers inotify to gfile for file notification,
53 unless gfile is explicitly requested via --with-file-notification='gfile'.
56 ** The configure option '--with-pkg-config-prog' has been removed.
57 Use './configure PKG_CONFIG=/full/name/of/pkg-config' if you need to.
60 ** The configure option '--with-mmdf' has been removed.
61 It was no longer useful, as it relied on libraries that are no longer
62 supported, and its presence led to confusion during configuration.
63 This affects only the 'movemail' utility; Emacs itself can still
64 process MMDF-format files as before.
66 ** The configure option '--enable-silent-rules' is now the default,
67 and silent rules are now quieter. To get the old behavior where
68 'make' chatters a lot, configure with '--disable-silent-rules' or
69 build with 'make V=1'.
72 ** The configure option '--with-gameuser' now allows to specify a
73 group instead of a user if its argument is prefixed by ':' (a colon).
74 This will cause the game score files in ${localstatedir}/games/emacs
75 to be owned by that group, and the helper program for updating them to
76 be installed setgid. The option now defaults to the 'games' group.
79 ** The `grep-changelog' script (and its manual page) are no longer included.
80 It has no particular connection to Emacs and has not changed in years,
81 so if you want to use it, you can always take a copy from an older Emacs.
84 * Startup Changes in Emacs 25.1
87 ** When Emacs is given a file as a command line argument and
88 `initial-buffer-choice' is non-nil, display both the file and
89 `initial-buffer-choice'. When Emacs is given more than one file and
90 `initial-buffer-choice' is non-nil, show `initial-buffer-choice'
91 and *Buffer List*. This makes Emacs convenient to use from the
92 command line when `initial-buffer-choice' is non-nil.
95 ** The value of ‘initial-scratch-message’ is now treated as a doc string
96 and can contain escape sequences for command keys, quotes, and the like.
99 * Changes in Emacs 25.1
101 ** `xref-find-definitions' and `describe-function' now display
102 information about mode local overrides (defined by
103 cedet/mode-local.el `define-overloadable-function' and
104 `define-mode-local-overrides').
106 ** New `display-buffer' action function `display-buffer-use-some-frame'
107 This displays the buffer in an existing frame other than the current
108 frame, and allows the caller to specify a frame predicate to exclude
111 ** New doc command `describe-symbol'. Works for functions, vars, faces, etc...
113 ** `isearch' and `query-replace' now perform character folding in matches.
114 This is analogous to case-folding, but applies between Unicode
115 characters and their ASCII counterparts. This means many characters
116 will match entire groups of characters.
118 For instance, the " will match all variants of unicode double quotes
119 (like “ and ”), and the letter a will match all of its accented
120 cousins, even those composed of multiple characters, as well as many
121 other symbols like ℀, ℁, ⒜, and ⓐ.
123 ** New function `character-fold-to-regexp' can be used
124 by searching commands to produce a regexp matching anything that
125 character-folds into STRING.
127 ** New command `checkdoc-package-keywords' checks if the
128 current package keywords are recognized. Set the new option
129 `checkdoc-package-keywords-flag' to non-nil to make
130 `checkdoc-current-buffer' call this function automatically.
132 ** New function `checkdoc-file' checks for style errors.
133 It's meant for use together with `compile':
134 emacs -batch --eval "(checkdoc-file \"subr.el\")"
136 ** New command `comment-line' bound to `C-x C-;'.
138 ** New function `custom-prompt-customize-unsaved-options' checks for
139 unsaved customizations and prompts user to customize (if found).
142 ** Network security (TLS/SSL certificate validity and the like) is
143 added via the new Network Security Manager (NSM) and controlled via
144 the `network-security-level' variable.
146 ** C-h l now also lists the commands that were run.
149 ** The new M-s M-w key binding uses eww to search the web for the
152 ** M-x suggests shorthands and ignores obsolete commands for completion.
153 ** x-select-enable-clipboard is renamed select-enable-clipboard.
154 x-select-enable-primary and renamed select-enable-primary.
155 Additionally they both now apply to all systems (OSX, GNUstep, Windows, you
156 name it), with the proviso that on some systems (e.g. Windows)
157 select-enable-primary is ineffective since the system doesn't
158 have the equivalent of a primary selection.
161 ** terpri gets an optional arg ENSURE to conditionally output a newline.
164 ** New macro `define-advice'.
166 ** `insert-register' now leaves point after the inserted text
167 when called interactively. A prefix argument toggles this behavior.
169 ** New var `truncate-string-ellipsis' to choose how to indicate truncation.
172 ** The new variable `term-file-aliases' replaces some files from lisp/term.
173 The function `tty-run-terminal-initialization' consults this variable
174 when deciding what terminal-specific initialization code to run.
177 ** New variable `system-configuration-features', listing some of the
178 main features that Emacs was compiled with. This is mainly intended
179 for use in Emacs bug reports.
182 ** A password is now hidden also when typed in batch mode. Another
183 hiding character but the default `.' can be used by let-binding the
184 variable `read-hide-char'.
186 ** The new functions `string-collate-lessp' and `string-collate-equalp'
187 preserve the collation order as defined by the system's locale(1)
188 environment. For the time being this is implemented for modern POSIX
189 systems and for MS-Windows, for other systems they fall back to their
190 counterparts `string-lessp' and `string-equal'.
192 *** The ls-lisp package uses `string-collate-lessp' to sort file names.
193 If you want the old, locale-independent sorting, customize the new
194 option `ls-lisp-use-string-collate' to a nil value.
196 *** The MS-Windows specific variable `w32-collate-ignore-punctuation',
197 if set to a non-nil value, causes the above 2 functions to ignore
198 symbol and punctuation characters when collating strings. This
199 emulates the behavior of modern Posix platforms when the locale's
200 codeset is "UTF-8" (as in "en_US.UTF-8"). This is needed because
201 MS-Windows doesn't support UTF-8 as codeset in its locales.
204 ** The new function `bidi-find-overridden-directionality' allows to
205 find characters whose directionality was, perhaps maliciously,
206 overridden by directional override control characters. Lisp programs
207 can use this to detect potential phishing of URLs and other links that
208 exploits bidirectional display reordering.
211 ** The new function `buffer-substring-with-bidi-context' allows to
212 copy a portion of a buffer into a different location while preserving
213 the visual appearance both of the copied text and the text at
214 destination, even when the copied text includes mixed bidirectional
215 text and directional control characters.
217 ** New variable `ns-use-fullscreen-animation' controls animation for
218 non-native NS fullscreen. The default is nil. Set to t to enable
219 animation when entering and leaving fullscreen. For native OSX fullscreen
222 ** A new text property `inhibit-read-only' can be used in read-only
223 buffers to allow certain parts of the text to be writable.
225 ** A new function `directory-files-recursively' returns all matching
226 files (recursively) under a directory.
228 ** The new function `directory-name-p' can be used to check whether a file
229 name (as returned from, for instance, `file-name-all-completions' is
230 a directory file name. It returns non-nil if the last character in
231 the name is a forward slash.
234 ** New variable `fast-but-imprecise-scrolling' inhibits
235 fontification during full screen scrolling operations, giving less
236 hesitant operation during auto-repeat of C-v, M-v at the cost of
237 possible inaccuracies in the end position.
239 ** The function `font-info' now returns more details about a font.
240 In particular, it now returns the average width of the font's
241 characters, which can be used for geometry-related calculations.
243 ** A new function `default-font-width' returns the average width of a
244 character in the current buffer's default font. If the default face
245 is remapped (see `face-remapping-alist'), the value for the remapped
246 face is returned. This function complements the existing function
247 `default-font-height'.
249 ** New functions `window-font-height' and `window-font-width' return
250 the height and average width of characters in a specified face and
251 window. If FACE is remapped (see `face-remapping-alist'), the
252 function returns the information for the remapped face.
254 ** A new function `window-max-chars-per-line' returns the maximal
255 number of characters that can be displayed on one line. If a face
256 and/or window are provided, these values are used for the
257 calculation. This function is different from `window-body-width' in
258 that it accounts for (i) continuation glyphs, (ii) the size of the
259 font, and (iii) the specified window.
261 ** New possible value for `system-type': nacl.
264 ** New variable `inhibit-message', when bound to non-nil, inhibits
265 `message' and related functions from displaying messages the Echo
266 Area. The output is still logged to the *Messages* buffer.
269 ** It is now safe for a mode that derives `tabulated-list-mode' to not
270 call `tabulated-list-init-header', in which case it will have no
274 ** `tabulated-list-print' takes a second optional argument, update,
275 which specifies an alternative printing method which is faster when
276 few or no entries have changed.
279 * Editing Changes in Emacs 25.1
281 ** Successive single-char deletions are collapsed in the undo-log just like
282 successive char insertions.
284 ** Unicode names entered via C-x 8 RET now use substring completion by default.
286 ** C-x 8 now has shorthands for these chars: ‐ ‑ ‒ – — ― ‘ ’ “ ” † ‡ • ′ ″
287 € № ← → ↔ − ≈ ≠ ≤ ≥. As before, you can type C-x 8 C-h to list shorthands.
289 ** New minor mode electric-quote-mode for quoting ‘like this’ and “like this”
290 as you type. See also the new variable ‘text-quoting-style’.
292 ** New minor mode global-eldoc-mode is enabled by default.
294 ** Emacs now supports "bracketed paste mode" when running on a terminal
295 that supports it. This facility allows Emacs to understand pasted
296 chunks of text as strings to be inserted, instead of interpreting each
297 character in the pasted text as actual user input. This results in a
298 paste experience similar to that under a window system, and significant
299 performance improvements when pasting large amounts of text.
301 ** Emacs now supports the latest version of the UBA.
302 The Emacs implementation of the Unicode Bidirectional Algorithm (UBA)
303 was updated to support all the latest additions and changes introduced
304 in Unicode Standard versions 6.3, 7.0, and the latest Unicode 8.0.
305 This includes full support for directional isolates and the
306 Bidirectional Parentheses Algorithm (BPA) specified by these Unicode
309 ** You can access `mouse-buffer-menu' (C-down-mouse-1) using C-f10.
312 ** New buffer-local `electric-pair-local-mode'.
315 * Changes in Specialized Modes and Packages in Emacs 25.1
317 ** You can recompute the VC state of a file buffer with `M-x vc-refresh-state'
318 ** Prog mode has some support for multi-mode indentation.
319 See `prog-indentation-context' and `prog-widen'.
321 ** Prettify Symbols mode supports custom composition predicates. By
322 overriding the default `prettify-symbols-compose-predicate', modes can
323 specify in which contexts a symbol map be composed to some unicode
324 character. `prettify-symbols-default-compose-p' is the default which
325 is suitable for most programming languages such as C or Lisp (but not
328 ** New `xterm-screen-extra-capabilities' config.
330 ** The `save-place' variable is replaced by a `save-place-mode'.
334 *** Hide message types by network or channel. `erc-hide-list' will
335 hide all messages of the specified type, where `erc-network-hide-list'
336 and `erc-channel-hide-list' will only hide the specified message types
337 for the respective specified targets.
340 *** `midnight-mode' is a proper minor mode.
341 *** clean-buffer-*-regexps can now specify buffers via predicate functions.
343 ** In xterms, killing text now also sets the CLIPBOARD/PRIMARY selection
344 in the surrounding GUI (using the OSC-52 escape sequence). This only works
345 if your xterm supports it and enables the `allowWindowOps' options (disabled
346 by default at least in Debian, for security reasons).
348 Similarly, you can yank the CLIPBOARD/PRIMARY selection (using the OSC-52
349 escape sequence) if your xterm has the feature enabled but for that you
350 additionally need to add `getSelection' to `xterm-extra-capabilities'.
352 ** xterm-mouse-mode now supports mouse-tracking (if your xterm supports it).
356 *** New "external" package status.
357 An external package is any installed package that's not built-in and
358 not from `package-user-dir', which usually means it's from an entry in
359 `package-directory-list'. They are treated much like built-in
360 packages, in that they cannot be deleted through the package menu and
361 are not considered for upgrades.
363 The effect, is that a user can manually place a specific version of a
364 package inside `package-directory-list' and the package menu will
367 *** If a package is available on multiple archives and one has higher
368 priority (as per `package-archive-priorities') only that one is
369 listed. This can be configured with `package-menu-hide-low-priority'.
371 *** `package-menu-toggle-hiding' now toggles the hiding of packages.
372 This includes the above-mentioned low-priority packages, as well as
373 available packages whose version is lower than the currently installed
374 version (which were previously impossible to display).
375 This allows users to downgrade a package if a lower version is
378 *** When filtering the package menu, keywords starting with "arc:" or
379 "status:" represent package archive or status, respectively, instead
382 *** Most functions which involve downloading information now take an
383 ASYNC argument. If it is non-nil, package.el performs the download(s)
386 *** New variable `package-menu-async' controls whether the
387 package-menu uses asynchronous downloads.
389 *** `package-install-from-buffer' and `package-install-file' work on directories.
390 This follows the same rules as installing from a .tar file, except the
391 -pkg file is optional.
393 *** Packages which are dependencies of other packages cannot be deleted.
394 The FORCE argument to `package-delete' overrides this.
396 *** New custom variable `package-selected-packages' tracks packages
397 which were installed by the user (as opposed to installed as
398 dependencies). This variable can also be manually customized.
400 *** New command `package-install-user-selected-packages' installs all
401 packages from `package-selected-packages' which are currently missing.
403 *** New command `package-autoremove' removes all packages which were
404 installed strictly as dependencies but are no longer needed.
408 When you invoke `shell' interactively, the *shell* buffer will now
409 display in a new window. However, you can customize this behavior via
410 the `display-buffer-alist' variable. For example, to get
411 the old behavior -- *shell* buffer displays in current window -- use
412 (add-to-list 'display-buffer-alist
413 '("^\\*shell\\*$" . (display-buffer-same-window))).
417 *** The `:protection' slot option is not obeyed any more.
419 *** The `newname' argument to constructors is optional&deprecated.
420 If you need your objects to be named, do it by inheriting from `eieio-named'.
422 *** The <class>-list-p and <class>-child-p functions are declared obsolete.
424 *** The <class> variables are declared obsolete.
426 *** The <initarg> variables are declared obsolete.
427 *** defgeneric and defmethod are declared obsolete.
429 *** `constructor' is now an obsolete alias for `make-instance'.
432 *** New command `ido-bury-buffer-at-head' bound to C-S-b
433 Bury the buffer at the head of `ido-matches', analogous to how C-k
434 kills the buffer at head.
435 *** A prefix argument to `ido-restrict-to-matches' will reverse its
436 meaning, and the list is restricted to those elements that do not
437 match the current input.
441 *** You can use <up> and <down> keys to move point in the multi-line
442 minibuffer just as in an ordinary buffer. Only when point moves over
443 the bottom/top of the minibuffer it goes to the next/previous history
444 element. The new commands bound to <up> and <down> in the minibuffer:
445 `next-line-or-history-element' and `previous-line-or-history-element'.
447 ** Search and Replace
449 *** Query-replace history is enhanced.
450 When query-replace reads the FROM string from the minibuffer, typing
451 `M-p' will now show previous replacements as "FROM SEP TO", where FROM
452 and TO are the original text and its replacement, and SEP is an arrow
453 string defined by the new variable `query-replace-from-to-separator'.
454 To select a prior replacement, type `M-p' until the desired
455 replacement appears in the minibuffer, and then exit the minibuffer by
460 *** If `quick-calc' is called with a prefix argument, insert the
461 result of the calculation into the current buffer.
464 *** New minor mode `global-eldoc-mode'
465 *** `eldoc-documentation-function' now defaults to `ignore'
466 *** `describe-char-eldoc' displays information about character at point,
467 and can be used as a default value of `eldoc-documentation-function'. It is
468 useful when, for example, one needs to distinguish various spaces (e.g. ] [,
469 ] [, ] [, etc.) while using mono-spaced font.
474 *** HTML can now be rendered using variable-width fonts.
477 *** A new command `F' (`eww-toggle-fonts') can be used to toggle
478 whether to use variable-pitch fonts or not. The user can also
479 customize the `shr-use-fonts' variable.
482 *** A new command `R' (`eww-readable') will try do identify the main
483 textual parts of a web page and display only that, leaving menus and
484 the like off the page.
487 *** You can now use several eww buffers in parallel by renaming eww
488 buffers you want to keep separate.
491 *** Partial state of the eww buffers (the URIs and the titles of the
492 pages visited) is now preserved in the desktop file.
495 *** `eww-after-render-hook' is now called after eww has rendered
496 the data in the buffer.
499 *** The `eww-reload' command now takes a prefix to not reload via
500 the net, but just use the local copy of the HTML.
503 *** The DOM shr and eww uses has been changed to the general Emacs
504 xml.el/libxml2 DOM, and a new package dom.el has been added to
505 interact with this DOM. See the Emacs Lisp manual for interface
509 *** `mailcap-mime-data' is now consulted when displaying PDF files.
512 *** The new `S' command will list all eww buffers, and allow managing
516 *** https pages with valid certificates have headers marked in green, while
517 invalid certificates are marked in red.
521 *** text/html messages that contain inline image parts will be
522 transformed into multipart/related messages before sending.
525 *** New UPatterns `quote', `app', `cl-struct', and `eieio'.
526 *** New UPatterns can be defined with `pcase-defmacro'.
528 *** New vector QPattern.
531 *** Strings after `:documentation' are highlighted as docstrings.
534 *** Rectangle Mark mode can have corners past EOL or in the middle of a TAB.
535 *** C-x C-x in rectangle-mark-mode now cycles through the four corners.
536 *** `string-rectangle' provides on-the-fly preview of the result.
538 ** New font-lock functions font-lock-ensure and font-lock-flush, which
539 should be used instead of font-lock-fontify-buffer when called from Elisp.
541 ** Macro `minibuffer-with-setup-hook' takes (:append FUN) to mean
542 appending FUN to `minibuffer-setup-hook'.
545 *** New functions cl-fresh-line, cl-digit-char-p and cl-parse-integer.
549 The seq library adds sequence manipulation functions and macros that
550 complement basic functions provided by subr.el. All functions are
551 prefixed with `seq-' and work on lists, strings and vectors.
555 The map library provides map-manipulation functions that work on alists,
556 hash-table and arrays. All functions are prefixed with "map-".
558 ** Calendar and diary
561 *** The default `diary-file' is now located in .emacs.d.
564 *** New commands to insert diary entries with Chinese dates:
565 `diary-chinese-insert-anniversary-entry' `diary-chinese-insert-entry'
566 `diary-chinese-insert-monthly-entry', `diary-chinese-insert-yearly-entry'.
569 *** The calendar can now list and mark diary entries with Chinese dates.
570 See `diary-chinese-list-entries' and `diary-chinese-mark-entries'.
573 *** The option `calendar-mode-line-format' can now be nil,
574 which means to do nothing special with the mode line in calendars.
577 *** New option `calendar-weekend-days'.
578 The option customizes which day headers receive the
579 `calendar-weekend-header' face.
582 *** New optional args N and STRING for ‘holiday-greek-orthodox-easter’.
585 *** Many items obsolete since at least version 23.1 have been removed.
586 The majority were function/variable/face aliases, too numerous to list here.
589 **** Functions `calendar-one-frame-setup', `calendar-only-one-frame-setup',
590 `calendar-two-frame-setup', `european-calendar', `american-calendar'.
592 **** Hooks `cal-menu-load-hook', `cal-x-load-hook'.
594 **** Macro `calendar-for-loop'.
596 **** Variables `european-calendar-style', `diary-face', `hebrew-holidays-{1,4}'.
598 **** The nil and list forms of `diary-display-function'.
600 ** New ERT function `ert-summarize-tests-batch-and-exit'.
602 ** New js.el option `js-indent-first-init'.
605 ** `Info-fontify-maximum-menu-size' can be t for no limit.
608 ** `info-display-manual' can now be given a prefix argument which (any
609 non-nil value) directs the command to limit the completion
610 alternatives to currently visited manuals.
613 ** ntlm.el has support for NTLM2.
617 *** The Rmail commands d, C-d and u take optional repeat counts to delete or
618 undelete multiple messages.
620 *** Rmail can now render HTML mail messages if your Emacs was built with
621 libxml2 or if you have the Lynx browser installed. By default, Rmail
622 will display the HTML version of a mail message that has both HTML and
623 plain text parts, if display of HTML email is possible; customize the
624 `rmail-mime-prefer-html' option to `nil' if you don't want that.
627 *** In the commands that make summaries by subject, recipients, or senders,
628 you can no longer use commas to separate regular expressions.
630 ** SES now supports local printer functions; see `ses-define-local-printer'.
632 ** In sh-mode, you can now use `sh-shell' as a file-local variable to
633 specify the type of shell in use (bash, csh, etc).
637 *** Fatal TLS errors are now silent by default.
641 *** The URL package accepts now the protocols "ssh", "scp" and "rsync".
642 When `url-handler-mode' is enabled, file operations for these
643 protocols as well as for "telnet" and "ftp" are passed to Tramp.
645 *** The URL package allows customizing the `url-user-agent' string.
646 The new `url-user-agent' variable can be customized to be a string or
649 *** The new interface variable `url-request-noninteractive' can be used
650 to specify that we're running in a noninteractive context, and that
651 we should not be queried about things like TLS certificate validity.
653 *** If URL is used with a https connection, the first callback argument
654 plist will contain a :peer element that has the output of
655 `gnutls-peer-status' (if Emacs is built with GnuTLS support).
660 *** New connection method "nc", which allows to access dumb busyboxes.
663 *** Method-specific parameters can be overwritten now with variable
664 `tramp-connection-properties'.
667 *** Handler for `file-notify-valid-p' for remote machines that support
668 filesystem notifications.
672 *** New user variable `sql-default-directory' enables remote
673 connections using Tramp.
675 *** New command `sql-send-line-and-next' sends the current line to the
676 interactive buffer and advances to the next line, skipping whitespace
679 *** Add support for Vertica SQL.
681 ** VC and related modes
683 *** Basic push support, via `vc-push', bound to `C-x v P'.
684 Implemented for Bzr, Git, Hg. As part of this change, the pre-existing
685 (undocumented) command vc-hg-push now behaves slightly differently.
687 *** The new command vc-region-history shows the log+diff of the active region.
689 *** New option `vc-annotate-background-mode' controls whether
690 the color range from `vc-annotate-color-map' is applied to the
691 background or to the foreground.
693 *** `compare-windows' now compares text with the most recently used window
694 instead of the next window. The new option `compare-windows-get-window-function'
695 allows to customize this.
697 *** Two new faces `compare-windows-removed' and `compare-windows-added'
698 replace the obsolete face `compare-windows'.
701 *** `log-edit-insert-changelog' converts "(tiny change)" to
702 "Copyright-paperwork-exempt: yes". Set `log-edit-rewrite-tiny-change'
705 ** VHDL mode supports VHDL'08.
707 ** Calculator: decimal display mode uses "," groups, so it's more
708 fitting for use in money calculations; factorial works with
711 ** HideIfDef mode now support full C/C++ expressions, argumented macro expansions,
712 interactive macro evaluation and automatic scanning of #defined symbols.
714 *** New custom variable `hide-ifdef-header-regexp' to define C/C++ header file
715 name patterns. Default case-insensitive .h, .hh, .hpp, .hxx, and .h++.
716 *** New custom variable `hide-ifdef-expand-reinclusion-protection' to prevent
717 reinclusion protected header files from being fully hidden.
718 *** New custom variable `hide-ifdef-exclude-define-regexp' to define symbol
719 name patterns (e.g. all "FOR_DOXYGEN_ONLY_*") to be excluded.
723 *** New custom variable `tex-print-file-extension' to help users who
724 use PDF instead of DVI.
726 *** TeX mode now supports Prettify Symbols mode. When enabling
727 `prettify-symbols-mode' in a tex-mode buffer, \alpha ... \omega, and
728 many other math macros are displayed using unicode characters.
730 ** whitespace-mode: new 'big-indent style highlighting too much indentation.
731 By default, 32 spaces and four TABs are considered to be too much but
732 `whitespace-big-indent-regexp' can be configured to change that.
734 ** tildify: `tildify-space-string', `tildify-pattern', and
735 `tildify-foreach-region-function' variables added making
736 `tildify-string-alist', `tildify-pattern-alist', and
737 `tildify-ignored-environments-alist' variables (as well as a few
738 helper functions) obsolete.
741 The new package provides generic framework and new commands to find
742 and move to definitions, as well as pop back to the original location.
745 `xref-find-definitions' replaces `find-tag' and provides an interface
746 to pick one destination among several. Hence, `tags-loop-continue' is
747 unbound. `xref-pop-marker-stack' replaces `pop-tag-mark', but uses an
748 easier binding, which is now unoccupied (`M-,').
749 `xref-find-definitions-other-window' replaces `find-tag-other-window'.
750 `xref-find-definitions-other-frame' replaces `find-tag-other-frame'.
751 `xref-find-apropos' replaces `find-tag-regexp'.
754 `find-tag-marker-ring-length' is now an obsolete alias for
755 `xref-marker-ring-length'. `find-tag-marker-ring' is now an obsolete
756 alias for a private variable. `xref-push-marker-stack' and
757 `xref-pop-marker-stack' should be used to mutate it instead.
760 As a result of the above, these commands are now obsolete:
761 `find-tag-other-window', `find-tag-other-frame', `find-tag-regexp',
762 `tags-apropos' and `tags-loop-continue'.
765 EUDC's LDAP backend has been improved.
767 *** EUDC supports LDAP-over-SSL URLs (ldaps://).
769 *** EUDC passes LDAP passwords through a pipe to the ldapsearch
770 subprocess instead of on the command line.
772 *** EUDC handles LDAP wildcards automatically so the user shouldn't
773 need to configure this manually anymore.
775 *** The LDAP configuration section of EUDC's manual has been
778 There have also been customization changes.
780 *** New custom variable `eudc-server-hotlist' to allow specifying
781 multiple EUDC servers in init file.
783 *** Custom variable `eudc-inline-query-format' defaults to completing
784 on email and firstname instead of surname.
786 *** Custom variable `eudc-expansion-overwrites-query' defaults to nil
787 to avoid interfering with the kill ring.
789 *** Custom variable `eudc-inline-expansion-format' defaults to
790 "Firstname Surname <mail-address>".
792 *** Custom variable `eudc-options-file' defaults to
793 "~/.emacs.d/eudc-options".
795 *** New custom variable `ldap-ldapsearch-password-prompt-regexp' to
796 allow overriding the regular expression that recognizes the ldapsearch
797 command line's password prompt.
802 *** The new built-in command `clear' can scroll window contents out of sight.
803 If provided with an optional non-nil argument, the scrollback contents will be cleared.
805 *** New buffer syntax '#<buffer-name>', which is equivalent to
806 '#<buffer buffer-name>'. This shorthand makes interacting with
807 buffers from eshell more convenient. Custom variable
808 `eshell-buffer-shorthand', which has been broken for a while, has been
811 *** By default, eshell "visual" program buffers (created by
812 `eshell-visual-commands' and similar custom vars) are no longer killed
813 when their processes die. This fixes issues with short-lived commands
814 and makes visual programs more useful in general. For example, if
815 "git log" is a visual command, it will always show the visual command
816 buffer, even if the "git log" process dies. For the old behavior,
817 make the new option `eshell-destroy-buffer-when-process-dies' non-nil.
821 *** Support for the Conkeror web browser.
824 *** Support for several ancient browsers is now officially obsolete.
827 ** tar-mode: new `tar-new-entry' command, allowing for new members to
828 be added to the archive.
831 ** Autorevert: dired buffers are also auto-reverted via file
832 notifications, if Emacs is compiled with file notification support.
835 ** File Notifications: the new function `file-notify-valid-p' checks,
836 whether a file notification descriptor still corresponds to an
844 *** landmark.el (moved to elpa.gnu.org)
847 * New Modes and Packages in Emacs 25.1
849 ** pinentry.el allows GnuPG passphrase to be prompted through the
850 minibuffer instead of a graphical dialog, depending on whether the gpg
851 command is called from Emacs (i.e., INSIDE_EMACS environment variable
852 is set). This feature requires newer versions of GnuPG (2.1.5 or
853 later) and Pinentry (0.9.5 or later).
855 ** cl-generic.el provides CLOS-style multiple-dispatch generic functions.
857 ** scss-mode (a minor variant of css-mode)
859 ** let-alist is a new macro (and a package) that allows one to easily
860 let-bind the values stored in an alist.
862 ** `tildify-mode' allows to automatically insert hard spaces as one
863 types the text. Breaking line after a single-character words is
864 forbidden by Czech and Polish typography (and may be discouraged in
865 other languages), so `auto-tildify-mode' makes it easier to create
866 a typographically-correct documents.
868 * Incompatible Lisp Changes in Emacs 25.1
870 ** `syntax-begin-function' is declared obsolete.
871 Removed font-lock-beginning-of-syntax-function and the SYNTAX-BEGIN
872 slot in font-lock-defaults.
875 ** `package-initialize' now sets `package-enable-at-startup' to nil if
876 called during startup. Users who call this function in their init
877 file and still expect it to be run after startup should set
878 `package-enable-at-startup' to t after the call to
879 `package-initialize'.
881 ** `:global' minor mode use `setq-default' rather than `setq'.
882 This means that you can't use `make-local-variable' and expect them to
883 "magically" become buffer-local.
885 ** `inhibit-point-motion-hooks' now defaults to t and is obsolete.
888 ** `track-mouse' no longer freezes the shape of the mouse pointer.
889 The `track-mouse' form no longer refrains from changing the shape of
890 the mouse pointer for the entire time the body of that form is
891 executed. Lisp programs that use `track-mouse' for dragging across
892 large portions of the Emacs display, and want to avoid changes in the
893 pointer shape during dragging, should bind the variable `track-mouse'
894 to the special value `dragging' in the body of the form.
896 ** The optional `predicate' argument of `lisp-complete-symbol' no longer
897 has any effect. (This change was made in Emacs 24.4 but was not
898 advertised at the time.)
900 ** `indirect-function' does not signal `void-function' any more.
901 This is mostly a bug-fix, since this change was missed back in 24.4 when
902 symbol-function was changed not to signal `void-function' any more.
903 *** As a consequence, the second arg of `indirect-function' is now obsolete.
905 ** Comint, term, and compile do not set the EMACS env var any more.
906 Use the INSIDE_EMACS environment variable instead.
908 ** `save-excursion' does not save&restore the mark any more.
910 ** read-buffer-function can now be called with a 4th argument (`predicate').
912 ** completion-table-dynamic stays in the minibuffer.
913 If you want the old behavior of calling the function in the buffer
914 from which the minibuffer was entered, call it with the new argument
917 ** window-configurations no longer record the buffers' marks.
919 ** inhibit-modification-hooks now also inhibits lock-file checks, as well as
920 active region handling.
922 ** deactivate-mark is now buffer-local.
924 ** `cl-the' now asserts that its argument is of the given type.
926 ** `process-running-child-p` may now return a numeric process
927 group ID instead of `t'.
930 ** Mouse click events on mode line or header line no longer include
931 any reference to a buffer position. The 6th member of the mouse
932 position list returned for such events is now nil.
934 ** Menu items in keymaps do not support the "key shortcut cache" any more.
935 These slots used to hold key-shortcut data, but have been obsolete since
938 ** Emacs no longer downcases the first letter of a system diagnostic
939 when signaling a file error. For example, it now reports "Permission
940 denied" instead of "permission denied". The old behavior was problematic
941 in languages like German where downcasing rules depend on grammar.
944 ** New variable ‘text-quoting-style’ to control how Emacs translates quotes.
945 Set it to ‘curve’ for curved single quotes ‘like this’, to ‘straight’
946 for straight apostrophes 'like this', and to ‘grave’ for grave accent
947 and apostrophe `like this'. The default value nil acts like ‘curve’
948 if curved single quotes are displayable, and like ‘grave’ otherwise.
949 The new variable affects display of diagnostics and help, but not of info.
952 ** substitute-command-keys now replaces quotes.
953 That is, it converts documentation strings’ quoting style as per the
954 value of ‘text-quoting-style’. Doc strings in source code can use
955 either curved single quotes or grave accents and apostrophes. As
956 before, characters preceded by \= are output as-is.
959 ** Message-issuing functions ‘error’, ‘message’, etc. now convert quotes.
960 They use the new ‘format-message’ function instead of plain ‘format’,
961 so that they now follow user preference as per ‘text-quoting-style’
962 when processing curved single quotes, grave accents, and apostrophes
963 in their format argument.
966 ** The character classes [:alpha:] and [:alnum:] in regular expressions
967 now match multibyte characters using Unicode character properties.
968 If you want the old behavior where they matched any character with
969 word syntax, use `\sw' instead.
972 ** The character classes [:graph:] and [:print:] in regular expressions
973 no longer match every multibyte character. Instead, Emacs now
974 consults the Unicode character properties to determine which
975 characters are graphic or printable. In particular, surrogates and
976 unassigned codepoints are now rejected. If you want the old behavior,
977 use [:multibyte:] instead.
980 ** The `diff' command uses the unified format now. To restore the old
981 behavior, set `diff-switches' to `-c'.
983 ** `grep-template' and `grep-find-template' values don't include the
984 --color argument anymore. It's added at the <C> place holder position
987 ** `grep-template' and `grep-find-template' values don't include the
988 --color argument anymore. It's added at the <C> place holder position
989 dynamically. Any third-party code that changes these templates should
990 be updated accordingly.
993 * Lisp Changes in Emacs 25.1
995 ** syntax-propertize is now automatically called on-demand during forward
996 parsing functions like `forward-sexp'.
998 ** New hooks prefix-command-echo-keystrokes-functions and
999 prefix-command-preserve-state-hook, to allow the definition of prefix
1000 commands other than the predefined C-u.
1002 ** New functions `filepos-to-bufferpos' and `bufferpos-to-filepos'.
1004 ** The default value of `load-read-function' is now `read'.
1006 ** New hook `pre-redisplay-functions', a bit easier to use than pre-redisplay-function.
1008 ** The second arg of `looking-back' should always be provided explicitly.
1010 ** Obsolete text properties `intangible', `point-entered', and `point-left'.
1011 Replaced by properties `cursor-intangible' and `cursor-sensor-functions',
1012 implemented by the new `cursor-intangible-mode' and
1013 `cursor-sensor-mode' minor modes.
1015 ** New process type `pipe', which can be used in combination with the
1016 `:stderr' keyword of make-process to handle standard error output
1019 ** New function `make-process' provides an alternative interface to
1020 `start-process'. It allows programs to set process parameters such as
1021 process filter, sentinel, etc., through keyword arguments (similar to
1022 `make-network-process').
1024 ** `read-buffer' takes a new `predicate' argument.
1026 ** Emacs Lisp now supports generators.
1028 ** New finalizer facility for running code when objects
1031 ** lexical closures can use (:documentation <form>) to build their docstring.
1032 It should be placed right where the docstring would be, and <form> is then
1033 evaluated (and should return a string) when the closure is built.
1035 ** define-inline provides a new way to define inlinable functions.
1037 ** New function `macroexpand-1' to perform a single step of macroexpansion.
1039 ** Some "x-*" were obsoleted:
1040 *** x-select-text is renamed gui-select-text.
1041 *** x-selection-value is renamed gui-selection-value.
1042 *** x-get-selection is renamed gui-get-selection.
1043 *** x-get-clipboard and x-clipboard-yank are marked obsolete.
1044 *** x-get-selection-value is renamed to gui-get-primary-selection.
1045 *** x-set-selection is renamed to gui-set-selection
1047 ** New function `string-greaterp', which return the opposite result of
1050 ** New function `alist-get', which is also a valid place (aka lvalue).
1052 ** New function `funcall-interactively', which works like `funcall'
1053 but makes `called-interactively-p' treat the function as (you guessed it)
1054 called interactively.
1056 ** New function `function-put' to use instead of `put' for function properties.
1059 ** New properties that can be specified with `declare':
1060 *** (interactive-only INSTEAD), says to use INSTEAD for non-interactive use.
1061 *** (pure VAL), if VAL is non-nil, indicates the function is pure.
1062 *** (side-effect-free VAL), if VAL is non-nil, indicates the function does not
1066 ** New macro `with-file-modes', for evaluating expressions with default file
1067 permissions set to temporary values (e.g., for creating private files).
1069 ** You can access the slots of structures using `cl-struct-slot-value'.
1071 ** Function `sort' can deal with vectors.
1073 ** Function `system-name' now returns an updated value if the current
1074 system's name has changed or if the Emacs process has changed systems,
1075 and to avoid long waits it no longer consults DNS to canonicalize the
1076 name. The variable `system-name' is now obsolete.
1079 ** Function `write-region' no longer outputs "Wrote FILE" in batch mode.
1081 ** If `pwd' is called with a prefix argument, insert the current default
1085 ** New utilities in subr-x.el:
1086 *** New macros `if-let' and `when-let' allow defining bindings and to
1087 execute code depending whether all values are true.
1088 *** New macros `thread-first' and `thread-last' allow threading a form
1089 as the first or last argument of subsequent forms.
1092 ** Documentation strings now support quoting with curved single quotes
1093 ‘like-this’ in addition to the old style with grave accent and
1094 apostrophe `like-this'. The new style looks better on today's displays.
1095 In the new Electric Quote mode, you can enter curved single quotes
1096 into documentation by typing ` and '. Outside Electric Quote mode,
1097 you can enter them by typing ‘C-x 8 [’ and ‘C-x 8 ]’, or (if your Alt
1098 key works) by typing ‘A-[’ and ‘A-]’. As described above under
1099 ‘text-quoting-style’, the user can specify how to display doc string
1103 ** New function ‘format-message’ is like ‘format’ and also converts
1104 curved single quotes, grave accents and apostrophes as per
1105 ‘text-quoting-style’.
1108 ** show-help-function's arg is converted via substitute-command-keys
1109 before being passed to the function. Help strings, help-echo
1110 properties, etc. can therefore contain command key escapes and
1114 ** Time-related changes:
1116 *** Time conversion functions now accept an optional ZONE argument
1117 that specifies the time zone rules for conversion. ZONE is omitted or
1118 nil for Emacs local time, t for Universal Time, ‘wall’ for system wall
1119 clock time, or a string as in ‘set-time-zone-rule’ for a time zone
1120 rule. The affected functions are ‘current-time-string’,
1121 ‘current-time-zone’, ‘decode-time’, and ‘format-time-string’. The
1122 function ‘encode-time’, which already accepted a simple time zone rule
1123 argument, has been extended to accept all the new forms.
1125 *** Time-related functions now consistently accept numbers
1126 (representing seconds since the epoch) and nil (representing the
1127 current time) as well as the usual list-of-integer representation.
1128 Affected functions include `current-time-string', `current-time-zone',
1129 `decode-time', `float-time', `format-time-string', `seconds-to-time',
1130 `time-add', `time-less-p', `time-subtract', `time-to-day-in-year',
1131 `time-to-days', and `time-to-seconds'.
1133 *** The `encode-time-value' and `with-decoded-time-value' macros have
1136 *** `calendar-next-time-zone-transition', `time-add', and
1137 `time-subtract' no longer return time values in the obsolete and
1138 undocumented integer-pair format. Instead, they return a list of two
1142 ** New function `set-binary-mode' allows to switch a standard stream
1143 of the Emacs process to binary I/O mode.
1145 ** ASCII approximations to curved quotes are put in standard-display-table
1146 if the terminal cannot display curved quotes.
1148 ** Standard output and error streams now transliterate characters via
1149 standard-display-table, and encode output using locale-coding-system.
1151 ** Miscellaneous name change
1153 For consistency with the usual Emacs spelling, the Lisp variable
1154 `hfy-optimisations' has been renamed to `hfy-optimizations'.
1155 The old name should still work, as an obsolescent alias.
1158 * Changes in Frames and Windows Code in Emacs 25.1
1161 ** Emacs can now draw horizontal scroll bars on some platforms that
1162 provide toolkit scroll bars, namely Gtk+, Lucid, Motif and Windows.
1163 Horizontal scroll bars are turned off by default.
1164 *** New function `horizontal-scroll-bars-available-p' telling whether
1165 horizontal scroll bars are available on the underlying system.
1166 *** New mode `horizontal-scroll-bar-mode' to toggle horizontal scroll
1167 bars on all existing and future frames.
1168 *** New function `toggle-horizontal-scroll-bar' to toggle horizontal
1169 scroll bars on the selected frame.
1170 *** New frame parameters `horizontal-scroll-bars' and
1171 `scroll-bar-height' to set horizontal scroll bars and their height
1172 for individual frames and in `default-frame-alist'.
1173 *** New functions `frame-scroll-bar-height' and
1174 `window-scroll-bar-height' return the height of horizontal scroll
1175 bars on a specific frame or window.
1176 *** `set-window-scroll-bars' now accepts five parameters where the last
1177 two specify height and type of the window's horizontal scroll bar.
1178 *** `window-scroll-bars' now returns type and sizes of horizontal scroll
1180 *** New buffer-local variables `horizontal-scroll-bar' and
1181 `scroll-bar-height'.
1184 ** New functions `frame-geometry' and `frame-edges' give access to a
1188 ** New functions `mouse-absolute-pixel-position' and
1189 `set-mouse-absolute-pixel-position' get/set screen coordinates of the
1193 ** The function `window-edges' now accepts three additional arguments to
1194 retrieve body, absolute and pixel edges of the window.
1197 ** The functions `window-inside-edges', `window-inside-pixel-edges' and
1198 `window-inside-absolute-pixel-edges' have been renamed to respectively
1199 `window-body-edges', `window-body-pixel-edges' and
1200 `window-absolute-body-pixel-edges'. The old names are kept as aliases.
1203 ** New function `window-absolute-pixel-position' to get the screen
1204 coordinates of a visible buffer position.
1207 ** The height of a frame's menu and tool bar are no longer counted in the
1208 frame's text height. This means that the text height stands only for
1209 the height of the frame's root window plus that of the echo area (if
1210 present). This was already the behavior for frames with external tool
1211 and menu bars (like in the Gtk builds) but has now been extended to all
1215 ** Frames now do not necessarily preserve the number of columns or lines
1216 they display when setting default font, menu bar, fringe width, or
1217 scroll bars. In particular, maximized and fullscreen frames are
1218 conceptually never resized if such settings change. For fullheight and
1219 fullwidth frames, the behavior may depend on the toolkit used.
1220 *** New option `frame-inhibit-implied-resize' if non-nil, means that
1221 setting default font, menu bar, fringe width, or scroll bars of a
1222 specific frame does not resize that frame in order to preserve the
1223 number of columns or lines it displays.
1226 ** New function `window-preserve-size' allows to preserve the size of
1227 windows without "fixing" it. It's supported by `fit-window-to-buffer',
1228 `temp-buffer-resize-mode' and `display-buffer'.
1231 ** New minor mode `window-divider-mode' and options
1232 `window-divider-default-places', `window-divider-default-bottom-width'
1233 and `window-divider-default-right-width'.
1236 ** New option `switch-to-buffer-in-dedicated-window' allows to customize
1237 how `switch-to-buffer' proceeds interactively when the selected window
1238 is strongly dedicated to its buffer.
1241 ** The option `even-window-heights' has been renamed to
1242 `even-window-sizes' and now handles window widths as well.
1244 ** Tearoff menus and detachable toolbars for Gtk+ has been removed.
1245 Those features have been deprecated in Gtk+ for a long time.
1249 *** etags no longer qualifies class members by default.
1250 By default, `etags' will not qualify class members for C-like
1251 object-oriented languages with their class names and namespaces, and
1252 will remove qualifications used explicitly in the code from the tag
1253 names it puts in TAGS files. This is so the etags.el back-end for
1254 `xref-find-definitions' is more accurate and produces less false
1257 Use --class-qualify (-Q) if you want the old default behavior of
1258 qualifying class members in C++, Java, and Objective C. Note that
1259 using -Q might make some class members become "unknown" to `M-.'
1260 (`xref-find-definitions'); if so, you can use `C-u M-.' to specify the
1261 qualified names by hand.
1264 * Changes in Emacs 25.1 on Non-Free Operating Systems
1267 ** MS-Windows specific Emacs build scripts are no longer in the distribution
1268 This includes the makefile.w32-in files in various subdirectories, and
1269 the support files. The file nt/configure.bat now just tells the user
1270 to use the procedure described in nt/INSTALL, by running the Posix
1271 `configure' script in the top-level directory.
1274 ** Building Emacs for MS-Windows requires at least Windows XP
1275 or Windows Server 2003. The built binaries still run on all versions
1276 of Windows starting with Windows 9X.
1279 ** Emacs running on MS-Windows now supports the daemon mode.
1281 ** The byte counts in etags-generated TAGS files are now the same on
1282 MS-Windows as they are on other platforms.
1285 ** On OS X, configure creates a Cocoa ("Nextstep") build by default.
1286 Pass '--without-ns' to configure to create an X11 build, the old default.
1288 ** OS X 10.5 or older is no longer supported.
1290 ** OS X on PowerPC is no longer supported.
1293 ** The new function 'w32-application-type' returns the type of an
1294 MS-Windows application given the name of its executable program file.
1297 ----------------------------------------------------------------------
1298 This file is part of GNU Emacs.
1300 GNU Emacs is free software: you can redistribute it and/or modify
1301 it under the terms of the GNU General Public License as published by
1302 the Free Software Foundation, either version 3 of the License, or
1303 (at your option) any later version.
1305 GNU Emacs is distributed in the hope that it will be useful,
1306 but WITHOUT ANY WARRANTY; without even the implied warranty of
1307 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1308 GNU General Public License for more details.
1310 You should have received a copy of the GNU General Public License
1311 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
1317 paragraph-separate: "[
\f]*$"