GNU Emacs NEWS -- history of user-visible changes.
-Copyright (C) 2014-2015 Free Software Foundation, Inc.
+Copyright (C) 2014-2016 Free Software Foundation, Inc.
See the end of the file for license conditions.
Please send Emacs bug reports to bug-gnu-emacs@gnu.org.
When you add a new item, use the appropriate mark if you are sure it applies,
otherwise leave it unmarked.
+\f
+* Installation Changes in Emacs 25.2
+
+** 'configure' detects the kqueue file notification library on *BSD
+and Mac OS X machines.
+
+\f
+* Startup Changes in Emacs 25.2
+
+\f
+* Changes in Emacs 25.2
+
+** It is possible to disable attempted recovery on fatal signals
+
+Two new variables allow to disable attempts to recover from stack
+overflow and to avoid automatic auto-save when Emacs is delivered a
+fatal signal. `attempt-stack-overflow-recovery', if set to `nil',
+will disable attempts to recover from C stack overflows; Emacs will
+then crash as with any other fatal signal.
+`attempt-orderly-shutdown-on-fatal-signal', if set to `nil', will
+disable attempts to auto-save the session and shut down in an orderly
+fashion when Emacs receives a fatal signal; instead, Emacs will
+terminate immediately. Both variables are non-`nil' by default.
+These variables are for users who would like to avoid the small
+probability of data corruption due to techniques Emacs uses to recover
+in these situations.
+
+\f
+* Editing Changes in Emacs 25.2
+
+\f
+* Changes in Specialized Modes and Packages in Emacs 25.2
+
+** File Notifications
+
+*** The kqueue library is integrated for *BSD and Mac OS X machines.
+
+\f
+* New Modes and Packages in Emacs 25.2
+
+\f
+* Incompatible Lisp Changes in Emacs 25.2
+
+\f
+* Lisp Changes in Emacs 25.2
+
+** Autoload files can be generated without timestamps,
+by setting `autoload-timestamps' to nil.
+
+\f
+* Changes in Emacs 25.2 on Non-Free Operating Systems
+
\f
* Installation Changes in Emacs 25.1
Various resolutions are available as etc/images/icons/hicolor/*/apps/emacs.png.
The old Emacs logo icons are available as `emacs23.png' in the same location.
+---
+** New make target `check-expensive' to run additional tests.
+This includes all tests which run via "make check", plus additional
+tests which take more time to perform.
+
\f
* Startup Changes in Emacs 25.1
\f
* Changes in Emacs 25.1
-+++
-** Any file of the form .dir-locals*.el is now considered a dir-local
-file, and multiple such files can be used in the same directory. See
-the variable `dir-locals-file' for more information.
+** Emacs can now load shared/dynamic libraries (modules).
+A dynamic Emacs module is a shared library that provides additional
+functionality for use in Emacs Lisp programs, just like a package
+written in Emacs Lisp would. The functions `load', `require',
+`load-file', etc. were extended to load such modules, as they do with
+Emacs Lisp packages. The new variable `module-file-suffix' holds the
+system-dependent value of the file-name extension (`.so' on Posix
+hosts) of the module files.
----
-** `xref-find-definitions' and `describe-function' now display
-information about mode local overrides (defined by cedet/mode-local.el
-`define-overloadable-function' `define-mode-local-overrides').
+A module should export a C-callable function named
+`emacs_module_init', which Emacs will call as part of the call to
+`load' or `require' which loads the module. It should also export a
+symbol named `plugin_is_GPL_compatible' to indicate that its code is
+released under the GPL or compatible license; Emacs will refuse to
+load modules that don't export such a symbol.
-+++
-** New `display-buffer' action function `display-buffer-use-some-frame'.
-This displays the buffer in an existing frame other than the current
-frame, and allows the caller to specify a frame predicate to exclude
-frames.
+If a module needs to call Emacs functions, it should do so through the
+API defined and documented in the header file `emacs-module.h'. Note
+that any module that provides Lisp-callable functions will have to use
+Emacs functions such as `fset' and `funcall', in order to register its
+functions with the Emacs Lisp interpreter.
-+++
-** New documentation command `describe-symbol'.
-Works for functions, variables, faces, etc. It is bound to `C-h o' by
-default.
+Modules can create `user-ptr' Lisp objects that embed pointers to C
+struct's defined by the module. This is useful for keeping around
+complex data structures created by a module, to be passed back to the
+module's functions. User-ptr objects can also have associated
+"finalizers" -- functions to be run when the object is GC'ed; this is
+useful for freeing any resources allocated for the underlying data
+structure, such as memory, open file descriptors, etc. A new
+predicate `user-ptrp' returns non-nil if its argument is a `user-ptr'
+object.
+
+Loadable modules in Emacs are an experimental feature, and subject to
+change in future releases. For that reason, their support is disabled
+by default, and must be enabled by using the `--with-modules' option
+at configure time.
+++
-** New function `custom-prompt-customize-unsaved-options' checks for
-unsaved customizations and prompts user to customize (if found). It
-is intended for adding to 'kill-emacs-query-functions'.
+** Any file of the form .dir-locals*.el is now considered a dir-local
+file, and multiple such files can be used in the same directory. See
+the variable `dir-locals-file' for more information.
+++
** Network security (TLS/SSL certificate validity and the like) is
added via the new Network Security Manager (NSM) and controlled via
the `network-security-level' variable.
+---
+** International domain names (IDNA) are now encoded via the new
+puny.el library, so that one can visit web sites like
+"http://méxico.icom.museum".
+
+** If Emacs isn't built with TLS support, an external TLS-capable
+program is used instead. This program used to be run in --insecure
+mode by default, but has now changed to be secure instead, and will
+fail if you try to connect to non-verifiable hosts. This is
+controlled by the `tls-program' variable.
+
+++
** C-h l now also lists the commands that were run.
-+++
-** x-select-enable-clipboard is renamed select-enable-clipboard
-and x-select-enable-primary is renamed select-enable-primary.
+** The new M-s M-w key binding uses eww to search the web for the
+text in the region.
+
+** M-x suggests shorthands and ignores obsolete commands for completion.
+** x-select-enable-clipboard is renamed select-enable-clipboard.
+x-select-enable-primary and renamed select-enable-primary.
Additionally they both now apply to all systems (OSX, GNUstep, Windows, you
name it), with the proviso that on some systems (e.g. Windows)
select-enable-primary is ineffective since the system doesn't
have the equivalent of a primary selection.
+++
-** terpri gets an optional arg ENSURE to conditionally output a newline.
+** New option `switch-to-buffer-in-dedicated-window' allows to customize
+how `switch-to-buffer' proceeds interactively when the selected window
+is strongly dedicated to its buffer.
+++
-** New macro `define-advice'.
+** The option `even-window-heights' has been renamed to
+`even-window-sizes' and now handles window widths as well.
+
++++
+** terpri gets an optional arg ENSURE to conditionally output a newline.
+++
** `insert-register' now leaves point after the inserted text
hiding character but the default `.' can be used by let-binding the
variable `read-hide-char'.
-** Emacs can now load shared/dynamic libraries (modules).
-A dynamic Emacs module is a shared library that provides additional
-functionality for use in Emacs Lisp programs, just like a package
-written in Emacs Lisp would. The functions `load', `require',
-`load-file', etc. were extended to load such modules, as they do with
-Emacs Lisp packages. The new variable `module-file-suffix' holds the
-system-dependent value of the file-name extension (`.so' on Posix
-hosts) of the module files.
-
-A module should export a C-callable function named
-`emacs_module_init', which Emacs will call as part of the call to
-`load' or `require' which loads the module. It should also export a
-symbol named `plugin_is_GPL_compatible' to indicate that its code is
-released under the GPL or compatible license; Emacs will refuse to
-load modules that don't export such a symbol.
-
-If a module needs to call Emacs functions, it should do so through the
-API defined and documented in the header file `emacs-module.h'. Note
-that any module that provides Lisp-callable functions will have to use
-Emacs functions such as `fset' and `funcall', in order to register its
-functions with the Emacs Lisp interpreter.
-
-Modules can create `user-ptr' Lisp objects that embed pointers to C
-struct's defined by the module. This is useful for keeping around
-complex data structures created by a module, to be passed back to the
-module's functions. User-ptr objects can also have associated
-"finalizers" -- functions to be run when the object is GC'ed; this is
-useful for freeing any resources allocated for the underlying data
-structure, such as memory, open file descriptors, etc. A new
-predicate `user-ptrp' returns non-nil if its argument is a `user-ptr'
-object.
-
-Loadable modules in Emacs are an experimental feature, and subject to
-change in future releases. For that reason, their support is disabled
-by default, and must be enabled by using the `--with-modules' option
-at configure time.
-
---
-** New input method: `tamil-dvorak'.
+** New input methods: `tamil-dvorak' and `programmer-dvorak'.
\f
* Editing Changes in Emacs 25.1
hesitant operation during auto-repeat of C-v, M-v at the cost of
possible inaccuracies in the end position.
++++
+** New documentation command `describe-symbol'.
+Works for functions, variables, faces, etc. It is bound to `C-h o' by
+default.
+
++++
+** New function `custom-prompt-customize-unsaved-options' checks for
+unsaved customizations and prompts user to customize (if found). It
+is intended for adding to 'kill-emacs-query-functions'.
+
\f
* Changes in Specialized Modes and Packages in Emacs 25.1
It raises an error if a bookmark of that name already exists,
unlike `bookmark-set' which silently updates an existing bookmark.
+** IMAP
+
+---
+*** `imap-ssl-program' has been removed, and imap.el uses the internal
+GnuTLS encryption functions if possible.
+
** JSON
---
`erc-network-hide-list' and `erc-channel-hide-list' will only hide the
specified message types for the respective specified targets.
+*** New variable `erc-default-port-tls' used to connect to TLS IRC
+servers.
+
** Midnight-mode
---
instrumented function.
** ElDoc
+
++++
*** New minor mode `global-eldoc-mode'
+It is turned on by default, and affects `*scratch*' and other buffers
+whose major mode supports Emacs Lisp.
+
+---
*** `eldoc-documentation-function' now defaults to `ignore'
+
+---
*** `describe-char-eldoc' displays information about character at point,
and can be used as a default value of `eldoc-documentation-function'. It is
useful when, for example, one needs to distinguish various spaces (e.g. ] [,
whether to use variable-pitch fonts or not. The user can also
customize the `shr-use-fonts' variable.
++++
+*** A new command `C' (`eww-toggle-colors') can be used to toggle
+whether to use the HTML-specified colors or not. The user can also
+customize the `shr-use-colors' variable.
+
+++
*** A new command `R' (`eww-readable') will try do identify the main
textual parts of a web page and display only that, leaving menus and
** Message mode
+---
*** text/html messages that contain inline image parts will be
transformed into multipart/related messages before sending.
-** pcase
-*** New UPatterns `quote', `app', `cl-struct', and `eieio'.
-*** New UPatterns can be defined with `pcase-defmacro'.
+++
-*** New vector QPattern.
+** In Show Paren Mode, a parenthesis can be highlighted when point
+stands inside it, and certain parens can be highlighted when point is
+at BOL or EOL, or in whitespace there. To enable these, customize,
+respectively, `show-paren-when-point-inside-paren' or
+`show-paren-when-point-in-periphery'.
** Lisp mode
+
+---
*** Strings after `:documentation' are highlighted as docstrings.
+This enhances Lisp mode fontification to handle documentation of the
+form `(:documentation "the doc string")' used in Common Lisp code for
+CLOS class and slot documentation.
** Rectangle editing
+
++++
*** Rectangle Mark mode can have corners past EOL or in the middle of a TAB.
+
++++
*** C-x C-x in rectangle-mark-mode now cycles through the four corners.
*** `string-rectangle' provides on-the-fly preview of the result.
-** New font-lock functions font-lock-ensure and font-lock-flush, which
-should be used instead of font-lock-fontify-buffer when called from Elisp.
++++
+** New font-lock functions `font-lock-ensure' and `font-lock-flush'.
+These should be used in preference to `font-lock-fontify-buffer' when
+called from Lisp.
+
+---
+** Macro `minibuffer-with-setup-hook' can optionally append a function
+to `minibuffer-setup-hook'.
-** Macro `minibuffer-with-setup-hook' takes (:append FUN) to mean
-appending FUN to `minibuffer-setup-hook'.
+If the first argument of the macro is of the form `(:append FUN)',
+then FUN will be appended to `minibuffer-setup-hook', instead of
+prepending it.
** cl-lib
-*** New functions cl-fresh-line, cl-digit-char-p and cl-parse-integer.
++++
+*** New functions `cl-fresh-line', `cl-digit-char-p', and `cl-parse-integer'.
** Calendar and diary
**** The nil and list forms of `diary-display-function'.
++++
** New ERT function `ert-summarize-tests-batch-and-exit'.
+If the output of ERT tests in batch mode execution can be saved to a
+log file, then it can be passed as an argument to the above function
+to produce a neat summary.
+---
** New js.el option `js-indent-first-init'.
+It was renamed from `js-indent-first-initialiser', to avoid issues
+with American vs British spelling.
+
+** Info
+
+---
+** Info mode now displays symbol names in fixed-pitch font.
+If you want to get the old behavior back, customize the `Info-quoted'
+face to use the same definitions as the default face.
---
-** `Info-fontify-maximum-menu-size' can be t for no limit.
+*** `Info-fontify-maximum-menu-size' can be t for no limit.
+++
-** `info-display-manual' can now be given a prefix argument which (any
+*** `info-display-manual' can now be given a prefix argument which (any
non-nil value) directs the command to limit the completion
alternatives to currently visited manuals.
** Rmail
-*** The Rmail commands d, C-d and u take optional repeat counts to delete or
-undelete multiple messages.
++++
+*** The Rmail commands `d', `C-d' and `u' take optional repeat counts
+to delete or undelete multiple messages.
++++
*** Rmail can now render HTML mail messages if your Emacs was built with
libxml2 or if you have the Lynx browser installed. By default, Rmail
will display the HTML version of a mail message that has both HTML and
*** In the commands that make summaries by subject, recipients, or senders,
you can no longer use commas to separate regular expressions.
++++
** SES now supports local printer functions; see `ses-define-local-printer'.
-** sh-script
+** Shell-script Mode
+---
*** In sh-mode you can now use `sh-shell' as a file-local variable to
specify the type of shell in use (bash, csh, etc).
-*** New value `always' for sh-indent-after-continuation.
+---
+*** New value `always' for `sh-indent-after-continuation'.
This provides old-style ("dumb") indentation of continued lines.
+See the doc string of `sh-indent-after-continuation' for details.
** TLS
---
** URL
++++
*** The URL package accepts now the protocols "ssh", "scp" and "rsync".
When `url-handler-mode' is enabled, file operations for these
protocols as well as for "telnet" and "ftp" are passed to Tramp.
++++
*** The URL package allows customizing the `url-user-agent' string.
The new `url-user-agent' variable can be customized to be a string or
a function.
+---
*** The new interface variable `url-request-noninteractive' can be used
to specify that we're running in a noninteractive context, and that
we should not be queried about things like TLS certificate validity.
+---
*** If URL is used with a https connection, the first callback argument
plist will contain a :peer element that has the output of
`gnutls-peer-status' (if Emacs is built with GnuTLS support).
** SQL mode
+---
*** New user variable `sql-default-directory' enables remote
connections using Tramp.
-*** New command `sql-send-line-and-next' sends the current line to the
-interactive buffer and advances to the next line, skipping whitespace
-and comments.
+---
+*** New command `sql-send-line-and-next'.
+This command, bound to `C-c C-n' by default, sends the current line to
+the SQL process and advances to the next line, skipping whitespace and
+comments.
-*** Add support for Vertica SQL.
+---
+*** Added support for Vertica SQL.
** VC and related modes
++++
*** Basic push support, via `vc-push', bound to `C-x v P'.
Implemented for Bzr, Git, Hg. As part of this change, the pre-existing
(undocumented) command vc-hg-push now behaves slightly differently.
++++
*** The new command vc-region-history shows the log+diff of the active region.
+++
outside Emacs (e.g., from the shell prompt), or if you switch the VC
back-end for the buffer's file, or remove it from version control.
++++
*** New option `vc-annotate-background-mode' controls whether
the color range from `vc-annotate-color-map' is applied to the
background or to the foreground.
-*** `compare-windows' now compares text with the most recently used window
-instead of the next window. The new option `compare-windows-get-window-function'
-allows to customize this.
++++
+*** `compare-windows' now compares text with the most recently selected window
+instead of the next window. If you want the previous behavior of
+comparing with the next window, customize the new option
+`compare-windows-get-window-function' to the value
+`compare-windows-get-next-window'.
+---
*** Two new faces `compare-windows-removed' and `compare-windows-added'
-replace the obsolete face `compare-windows'.
+replace the face `compare-windows', which is now an obsolete alias for
+`compare-windows-added'.
---
*** `log-edit-insert-changelog' converts "(tiny change)" to
"Copyright-paperwork-exempt: yes". Set `log-edit-rewrite-tiny-change'
nil to disable this.
-** VHDL mode supports VHDL'08.
+---
+** VHDL mode now supports VHDL'08.
+
+** Calculator
+
+---
+*** Decimal display mode uses "," groups, so it's more
+fitting for use in money calculations
+
+---
+*** Factorial works with non-integer inputs.
+
+** Hide-IfDef mode
+
+---
+*** Hide-IfDef mode now support full C/C++ expressions in macros,
+macro argument expansion, interactive macro evaluation and automatic
+scanning of #define'd symbols.
+
+---
+*** New command `hif-evaluate-macro', bound to `C-c @ e', displays the
+result of evaluating a macro.
-** Calculator: decimal display mode uses "," groups, so it's more
-fitting for use in money calculations; factorial works with
-non-integer inputs.
+---
+*** New command `hif-clear-all-ifdef-define', bound to `C-c @ C', clears
+all defined symbols in `hide-ifdef-env'.
-** HideIfDef mode now support full C/C++ expressions, argumented macro expansions,
-interactive macro evaluation and automatic scanning of #defined symbols.
+---
+*** New custom variable `hide-ifdef-header-regexp' to define C/C++ header
+file name patterns. Defaults to files whose extension is one of `.h',
+`.hh', `.hpp', `.hxx', or `.h++', matched case-insensitively.
-*** New custom variable `hide-ifdef-header-regexp' to define C/C++ header file
-name patterns. Default case-insensitive .h, .hh, .hpp, .hxx, and .h++.
+---
*** New custom variable `hide-ifdef-expand-reinclusion-protection' to prevent
-reinclusion protected header files from being fully hidden.
+reinclusion protected (a.k.a. "idempotent") header files from being hidden.
+(This could happen when an idempotent header file is visited again,
+when its guard symbol is already defined.) Defaults to `t'.
+
+---
*** New custom variable `hide-ifdef-exclude-define-regexp' to define symbol
-name patterns (e.g. all "FOR_DOXYGEN_ONLY_*") to be excluded.
+name patterns (e.g. all "FOR_DOXYGEN_ONLY_*") to be ignored when
+looking for macro definitions. By default, no symbols are ignored.
** TeX mode
++++
*** New custom variable `tex-print-file-extension' to help users who
use PDF instead of DVI.
++++
*** TeX mode now supports Prettify Symbols mode. When enabling
`prettify-symbols-mode' in a tex-mode buffer, \alpha ... \omega, and
many other math macros are displayed using unicode characters.
-** whitespace-mode: new 'big-indent style highlighting too much indentation.
-By default, 32 spaces and four TABs are considered to be too much but
-`whitespace-big-indent-regexp' can be configured to change that.
++++
+** New `big-indent' style in `whitespace-mode' highlights deep indentation.
+By default, 32 consecutive spaces or four consecutive TABs are
+considered to be too deep, but the new variable
+`whitespace-big-indent-regexp' can be customized to change that.
-** tildify: `tildify-space-string', `tildify-pattern', and
-`tildify-foreach-region-function' variables added making
+---
+** New options in `tildify-mode'.
+New options `tildify-space-string', `tildify-pattern', and
+`tildify-foreach-region-function' variables make
`tildify-string-alist', `tildify-pattern-alist', and
`tildify-ignored-environments-alist' variables (as well as a few
helper functions) obsolete.
-** xref
-The new package provides generic framework and new commands to find
-and move to definitions, as well as pop back to the original location.
++++
+** New package Xref replaces Etags's front-end and UI
+
+The new package Xref provides a generic framework and new commands to
+find and move to definitions of functions, macros, data structures
+etc., as well as go back to the location where you were before moving
+to a definition. It supersedes and obsoletes many Etags commands,
+while still using the etags.el code that reads the TAGS tables as one
+of its back-ends.
+
+The command `xref-find-definitions' replaces `find-tag' and provides
+an interface to pick one definition among several.
+`tags-loop-continue' is now unbound. `xref-pop-marker-stack' replaces
+`pop-tag-mark', but has a keybinding (`M-,'), unlike `pop-tag-mark'.
-*** New key bindings
-`xref-find-definitions' replaces `find-tag' and provides an interface
-to pick one destination among several. Hence, `tags-loop-continue' is
-unbound. `xref-pop-marker-stack' replaces `pop-tag-mark', but uses an
-easier binding, which is now unoccupied (`M-,').
`xref-find-definitions-other-window' replaces `find-tag-other-window'.
`xref-find-definitions-other-frame' replaces `find-tag-other-frame'.
`xref-find-apropos' replaces `find-tag-regexp'.
+As a result of this, the following commands are now obsolete:
+`find-tag-other-window', `find-tag-other-frame', `find-tag-regexp',
+`tags-apropos', and `tags-loop-continue'.
+
++++
*** New variables
+
`find-tag-marker-ring-length' is now an obsolete alias for
`xref-marker-ring-length'. `find-tag-marker-ring' is now an obsolete
alias for a private variable. `xref-push-marker-stack' and
-`xref-pop-marker-stack' should be used to mutate it instead.
+`xref-pop-marker-stack' should be used instead to manipulate the stack
+of searches for definitions.
-** etags
-As a result of the above, these commands are now obsolete:
-`find-tag-other-window', `find-tag-other-frame', `find-tag-regexp',
-`tags-apropos' and `tags-loop-continue'.
+---
+*** `xref-find-definitions' and `describe-function' now display
+information about mode local overrides (defined by cedet/mode-local.el
+`define-overloadable-function' `define-mode-local-overrides').
+
+The framework's Lisp API is still experimental and can change in major,
+backward-incompatible ways.
+
+---
+** New package Project
+
+The new package Project provides generic infrastructure for dealing
+with projects. The main commands included in it are
+`project-find-file' and `project-find-regexp'.
+
+The Lisp API of this package is still experimental.
** EUDC
EUDC's LDAP backend has been improved.
++++
*** EUDC supports LDAP-over-SSL URLs (ldaps://).
+---
*** EUDC passes LDAP passwords through a pipe to the ldapsearch
subprocess instead of on the command line.
+---
*** EUDC handles LDAP wildcards automatically so the user shouldn't
need to configure this manually anymore.
++++
*** The LDAP configuration section of EUDC's manual has been
rewritten.
There have also been customization changes.
++++
*** New custom variable `eudc-server-hotlist' to allow specifying
multiple EUDC servers in init file.
++++
*** Custom variable `eudc-inline-query-format' defaults to completing
on email and firstname instead of surname.
+---
*** Custom variable `eudc-expansion-overwrites-query' defaults to nil
to avoid interfering with the kill ring.
++++
*** Custom variable `eudc-inline-expansion-format' defaults to
"Firstname Surname <mail-address>".
++++
*** Custom variable `eudc-options-file' defaults to
"~/.emacs.d/eudc-options".
+---
*** New custom variable `ldap-ldapsearch-password-prompt-regexp' to
allow overriding the regular expression that recognizes the ldapsearch
command line's password prompt.
+---
EUDC's BBDB backend now supports BBDB 3.
+---
EUDC's PH backend (eudcb-ph.el) is obsolete.
** Eshell
*** The new built-in command `clear' can scroll window contents out of sight.
If provided with an optional non-nil argument, the scrollback contents will be cleared.
++++
*** New buffer syntax '#<buffer-name>', which is equivalent to
'#<buffer buffer-name>'. This shorthand makes interacting with
buffers from eshell more convenient. Custom variable
`eshell-buffer-shorthand', which has been broken for a while, has been
removed.
++++
*** By default, eshell "visual" program buffers (created by
`eshell-visual-commands' and similar custom vars) are no longer killed
when their processes die. This fixes issues with short-lived commands
** Browse-url
+---
*** Support for the Conkeror web browser.
---
compression command is determined from the new
`dired-compress-files-alist' variable.
++++
+*** `W' is now bound to `browse-url-of-dired-file', and is useful for
+viewing HTML files and the like.
+
** Tabulated List Mode
+++
---
*** gulp.el
+---
*** landmark.el (moved to elpa.gnu.org)
\f
* New Modes and Packages in Emacs 25.1
+---
** pinentry.el allows GnuPG passphrase to be prompted through the
minibuffer instead of a graphical dialog, depending on whether the gpg
command is called from Emacs (i.e., INSIDE_EMACS environment variable
** cl-generic.el provides CLOS-style multiple-dispatch generic functions.
+---
** scss-mode (a minor variant of css-mode)
+---
** let-alist is a new macro (and a package) that allows one to easily
let-bind the values stored in an alist.
+---
** `tildify-mode' allows to automatically insert hard spaces as one
types the text. Breaking line after a single-character words is
forbidden by Czech and Polish typography (and may be discouraged in
other languages), so `auto-tildify-mode' makes it easier to create
a typographically-correct documents.
+---
** The `seq' library adds sequence manipulation functions and macros
that complement basic functions provided by subr.el. All functions
are prefixed with `seq-' and work on lists, strings and vectors.
+---
** The `map' library provides map-manipulation functions that work on
alists, hash-table and arrays. All functions are prefixed with
`map-'.
+---
** The `thunk' library provides functions and macros to control the
evaluation of forms.
+---
** js-jsx-mode (a minor variant of js-mode) provides indentation
support for JSX, an XML-like syntax extension to ECMAScript.
last variable when there was an odd number of arguments has been
eliminated.
++++
** `syntax-begin-function' is declared obsolete.
Removed font-lock-beginning-of-syntax-function and the SYNTAX-BEGIN
slot in font-lock-defaults.
`package-enable-at-startup' to t after the call to
`package-initialize'.
+---
** `:global' minor mode use `setq-default' rather than `setq'.
This means that you can't use `make-local-variable' and expect them to
"magically" become buffer-local.
-** `inhibit-point-motion-hooks' now defaults to t and is obsolete.
-
+++
** `track-mouse' no longer freezes the shape of the mouse pointer.
The `track-mouse' form no longer refrains from changing the shape of
has any effect. (This change was made in Emacs 24.4 but was not
advertised at the time.)
++++
** `indirect-function' does not signal `void-function' any more.
This is mostly a bug-fix, since this change was missed back in 24.4 when
symbol-function was changed not to signal `void-function' any more.
++++
*** As a consequence, the second arg of `indirect-function' is now obsolete.
** Comint, term, and compile do not set the EMACS env var any more.
any reference to a buffer position. The 6th member of the mouse
position list returned for such events is now nil.
+---
** Menu items in keymaps do not support the "key shortcut cache" any more.
These slots used to hold key-shortcut data, but have been obsolete since
Emacs-21.
+---
** Emacs no longer downcases the first letter of a system diagnostic
when signaling a file error. For example, it now reports "Permission
denied" instead of "permission denied". The old behavior was problematic
** The `diff' command uses the unified format now. To restore the old
behavior, set `diff-switches' to `-c'.
+---
** `grep-template' and `grep-find-template' values don't include the
--color argument anymore. It's added at the <C> place holder position
dynamically. Any third-party code that changes these templates should
\f
* Lisp Changes in Emacs 25.1
+** pcase
+*** New UPatterns `quote', `app', `cl-struct', `eieio', `seq', and `map'.
+*** New UPatterns can be defined with `pcase-defmacro'.
++++
+*** New vector QPattern.
+
+---
** syntax-propertize is now automatically called on-demand during forward
parsing functions like `forward-sexp'.
implemented by the new `cursor-intangible-mode' and
`cursor-sensor-mode' minor modes.
+** `inhibit-point-motion-hooks' now defaults to t and is obsolete.
+
++++
** New process type `pipe', which can be used in combination with the
`:stderr' keyword of make-process to handle standard error output
of subprocess.
++++
** New function `make-process' provides an alternative interface to
`start-process'. It allows programs to set process parameters such as
process filter, sentinel, etc., through keyword arguments (similar to
+++
** New variable `inhibit-message', when bound to non-nil, inhibits
-`message' and related functions from displaying messages the Echo
-Area. The output is still logged to the *Messages* buffer.
+`message' and related functions from displaying messages in the echo
+area. The output is still logged to the *Messages* buffer.
+++
** A new text property `inhibit-read-only' can be used in read-only
buffers to allow certain parts of the text to be writable.
++++
+** A new variable `comment-end-can-be-escaped' is useful in languages
+ such as C and C++ where line comments with escaped newlines are
+ continued to the next line.
+
++++
+** New macro `define-advice'.
+
** `read-buffer' takes a new `predicate' argument.
++++
** Emacs Lisp now supports generators.
+See the "Generators" section of the ELisp manual for the details.
-** New finalizer facility for running code when objects
- become unreachable.
++++
+** New finalizer facility for running code when objects become unreachable.
+See the "Finalizer Type" subsection in the ELisp manual for the
+details.
-** lexical closures can use (:documentation <form>) to build their docstring.
-It should be placed right where the docstring would be, and <form> is then
+** lexical closures can use (:documentation FORM) to build their docstring.
+It should be placed right where the docstring would be, and FORM is then
evaluated (and should return a string) when the closure is built.
** define-inline provides a new way to define inlinable functions.
** New macro `with-file-modes', for evaluating expressions with default file
permissions set to temporary values (e.g., for creating private files).
++++
** You can access the slots of structures using `cl-struct-slot-value'.
** Function `sort' can deal with vectors.
+++
** Function `write-region' no longer outputs "Wrote FILE" in batch mode.
+---
** If `pwd' is called with a prefix argument, insert the current default
directory at point.
the name is a directory separator character (forward slash on GNU and
Unix systems, forward- or backslash on MS-Windows and MS-DOS).
+---
** ASCII approximations to curved quotes are put in standard-display-table
if the terminal cannot display curved quotes.
++++
** Standard output and error streams now transliterate characters via
standard-display-table, and encode output using locale-coding-system.
+To force a specific encoding, bind `coding-system-for-write' to the
+coding-system of your choice when invoking functions like `prin1' and
+`message'.
+++
** New var `truncate-string-ellipsis' to choose how to indicate truncation.
** Miscellaneous name change
+---
For consistency with the usual Emacs spelling, the Lisp variable
`hfy-optimisations' has been renamed to `hfy-optimizations'.
The old name should still work, as an obsolescent alias.
-\f
-* Changes in Frames and Windows Code in Emacs 25.1
+** Changes in Frame- and Window- Handling
+++
-** Emacs can now draw horizontal scroll bars on some platforms that
+*** Emacs can now draw horizontal scroll bars on some platforms that
provide toolkit scroll bars, namely Gtk+, Lucid, Motif and Windows.
Horizontal scroll bars are turned off by default.
-*** New function `horizontal-scroll-bars-available-p' telling whether
+
+**** New function `horizontal-scroll-bars-available-p' telling whether
horizontal scroll bars are available on the underlying system.
-*** New mode `horizontal-scroll-bar-mode' to toggle horizontal scroll
+
+**** New mode `horizontal-scroll-bar-mode' to toggle horizontal scroll
bars on all existing and future frames.
-*** New function `toggle-horizontal-scroll-bar' to toggle horizontal
+
+**** New function `toggle-horizontal-scroll-bar' to toggle horizontal
scroll bars on the selected frame.
-*** New frame parameters `horizontal-scroll-bars' and
+
+**** New frame parameters `horizontal-scroll-bars' and
`scroll-bar-height' to set horizontal scroll bars and their height
for individual frames and in `default-frame-alist'.
-*** New functions `frame-scroll-bar-height' and
+
+**** New functions `frame-scroll-bar-height' and
`window-scroll-bar-height' return the height of horizontal scroll
bars on a specific frame or window.
-*** `set-window-scroll-bars' now accepts five parameters where the last
+
+**** `set-window-scroll-bars' now accepts five parameters where the last
two specify height and type of the window's horizontal scroll bar.
-*** `window-scroll-bars' now returns type and sizes of horizontal scroll
+
+**** `window-scroll-bars' now returns type and sizes of horizontal scroll
bars too.
-*** New buffer-local variables `horizontal-scroll-bar' and
+
+**** New buffer-local variables `horizontal-scroll-bar' and
`scroll-bar-height'.
+++
-** New functions `frame-geometry' and `frame-edges' give access to a
+*** New functions `frame-geometry' and `frame-edges' give access to a
frame's geometry.
+++
-** New functions `mouse-absolute-pixel-position' and
+*** New functions `mouse-absolute-pixel-position' and
`set-mouse-absolute-pixel-position' get/set screen coordinates of the
mouse cursor.
+++
-** The function `window-edges' now accepts three additional arguments to
+*** The function `window-edges' now accepts three additional arguments to
retrieve body, absolute and pixel edges of the window.
+++
-** The functions `window-inside-edges', `window-inside-pixel-edges' and
+*** The functions `window-inside-edges', `window-inside-pixel-edges' and
`window-inside-absolute-pixel-edges' have been renamed to respectively
`window-body-edges', `window-body-pixel-edges' and
`window-absolute-body-pixel-edges'. The old names are kept as aliases.
+++
-** New function `window-absolute-pixel-position' to get the screen
+*** New function `window-absolute-pixel-position' to get the screen
coordinates of a visible buffer position.
+++
-** The height of a frame's menu and tool bar are no longer counted in the
+*** The height of a frame's menu and tool bar are no longer counted in the
frame's text height. This means that the text height stands only for
the height of the frame's root window plus that of the echo area (if
present). This was already the behavior for frames with external tool
builds.
+++
-** Frames now do not necessarily preserve the number of columns or lines
+*** Frames now do not necessarily preserve the number of columns or lines
they display when setting default font, menu bar, fringe width, or
scroll bars. In particular, maximized and fullscreen frames are
conceptually never resized if such settings change. For fullheight and
fullwidth frames, the behavior may depend on the toolkit used.
-*** New option `frame-inhibit-implied-resize' if non-nil, means that
+**** New option `frame-inhibit-implied-resize' if non-nil, means that
setting default font, menu bar, fringe width, or scroll bars of a
specific frame does not resize that frame in order to preserve the
number of columns or lines it displays.
+++
-** New function `window-preserve-size' allows to preserve the size of
+*** New function `window-preserve-size' allows to preserve the size of
windows without "fixing" it. It's supported by `fit-window-to-buffer',
`temp-buffer-resize-mode' and `display-buffer'.
+++
-** New minor mode `window-divider-mode' and options
-`window-divider-default-places', `window-divider-default-bottom-width'
-and `window-divider-default-right-width'.
-
-+++
-** New option `switch-to-buffer-in-dedicated-window' allows to customize
-how `switch-to-buffer' proceeds interactively when the selected window
-is strongly dedicated to its buffer.
+*** New `display-buffer' action function `display-buffer-use-some-frame'.
+This displays the buffer in an existing frame other than the current
+frame, and allows the caller to specify a frame predicate to exclude
+frames.
+++
-** The option `even-window-heights' has been renamed to
-`even-window-sizes' and now handles window widths as well.
+*** New minor mode `window-divider-mode' and options
+`window-divider-default-places', `window-divider-default-bottom-width'
+and `window-divider-default-right-width'.
-** Tearoff menus and detachable toolbars for Gtk+ has been removed.
+** Tearoff menus and detachable toolbars for Gtk+ have been removed.
Those features have been deprecated in Gtk+ for a long time.
** Etags
++++
*** etags no longer qualifies class members by default.
By default, `etags' will not qualify class members for C-like
(`xref-find-definitions'); if so, you can use `C-u M-.' to specify the
qualified names by hand.
++++
*** New language Ruby
Names of modules, classes, methods, and functions are tagged.
Overloaded operators are also tagged.
++++
*** Improved support for Lua
Etags now tags functions even if the "function" keyword follows some
+++
** Emacs running on MS-Windows now supports the daemon mode.
+---
** The byte counts in etags-generated TAGS files are now the same on
MS-Windows as they are on other platforms.
** On OS X, configure creates a Cocoa ("Nextstep") build by default.
Pass '--without-ns' to configure to create an X11 build, the old default.
+---
** OS X 10.5 or older is no longer supported.
+---
** OS X on PowerPC is no longer supported.
---