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.
*** The kqueue library is integrated for *BSD and Mac OS X machines.
+** Tramp
+
+*** New connection method "sg", which allows to edit files under
+different group ID.
+
\f
* New Modes and Packages in Emacs 25.2
\f
* Lisp Changes in Emacs 25.2
+** New var syntax-ppss-table to control the syntax-table used in syntax-ppss
+
+** Autoload files can be generated without timestamps,
+by setting `autoload-timestamps' to nil.
+
\f
* Changes in Emacs 25.2 on Non-Free Operating Systems
This builds Emacs with Cairo drawing. As a side effect, it provides
support for built-in printing, when Emacs was built with GTK+.
++++
** New configure option --with-modules.
This enables support for loading dynamic modules; see below.
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
++++
** 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
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.
variable `read-hide-char'.
---
-** New input method: `tamil-dvorak'.
+** New input methods: `tamil-dvorak' and `programmer-dvorak'.
\f
* Editing Changes in Emacs 25.1
It's meant for use together with `compile':
emacs -batch --eval "(checkdoc-file \"subr.el\")"
+** Desktop
+
+---
+*** The desktop format version has been upgraded from 206 to 208.
+Although Emacs 25.1 can read a version 206 desktop, earlier Emacsen
+cannot read a version 208 desktop. To upgrade your desktop file, you
+must explicitly request the upgrade, by C-u M-x desktop-save. You are
+recommended to do this as soon as you have firmly upgraded to Emacs
+25.1 (or later). Should you ever need to downgrade your desktop file
+to version 206, you can do this with C-u C-u M-x desktop-save.
+
+++
** New function `bookmark-set-no-overwrite' bound to C-x r M.
It raises an error if a bookmark of that name already exists,
`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
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
---
*** Fatal TLS errors are now silent by default.
+---
+*** 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.
+
** URL
+++
---
*** Factorial works with non-integer inputs.
-** HideIfDef mode now support full C/C++ expressions, argumented macro
-expansions, interactive macro evaluation and automatic scanning of
-#defined symbols.
+** Hide-IfDef mode
-*** New custom variable `hide-ifdef-header-regexp' to define C/C++ header file
-name patterns. Default case-insensitive .h, .hh, .hpp, .hxx, and .h++.
+---
+*** 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.
+
+---
+*** New command `hif-clear-all-ifdef-define', bound to `C-c @ C', clears
+all defined symbols in `hide-ifdef-env'.
+
+---
+*** 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-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-,') different from the one
+`pop-tag-mark' used.
-*** 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'.
+
+`tags-loop-continue' is not obsolete because it's still useful in
+`tags-search' and `tags-query-replace', for which there are no direct
+replacements yet.
+
++++
*** 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.
---
*** `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').
-** 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'.
+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.
---
---
*** 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.
Use the INSIDE_EMACS environment variable instead.
++++
** `save-excursion' does not save&restore the mark any more.
+Use `save-mark-and-excursion' if you want the old behavior.
-** read-buffer-function can now be called with a 4th argument (`predicate').
++++
+** `read-buffer' and `read-buffer-function' can now be called with a 4th
+argument (`predicate').
-** completion-table-dynamic stays in the minibuffer.
++++
+** `completion-table-dynamic' by default stays in the minibuffer.
+The minibuffer will be the current buffer when the function is called.
If you want the old behavior of calling the function in the buffer
-from which the minibuffer was entered, call it with the new argument
-`switch-buffer'.
+from which the minibuffer was entered, use the new argument
+`switch-buffer' to `completion-table-dynamic'.
+---
** window-configurations no longer record the buffers' marks.
+---
** inhibit-modification-hooks now also inhibits lock-file checks, as well as
active region handling.
++++
** deactivate-mark is now buffer-local.
++++
** `cl-the' now asserts that its argument is of the given type.
-** `process-running-child-p` may now return a numeric process
++++
+** `process-running-child-p' may now return a numeric process
group ID instead of `t'.
+++
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
+++
*** New vector QPattern.
+---
** syntax-propertize is now automatically called on-demand during forward
parsing functions like `forward-sexp'.
-** New hooks prefix-command-echo-keystrokes-functions and
-prefix-command-preserve-state-hook, to allow the definition of prefix
-commands other than the predefined C-u.
++++
+** New hooks `prefix-command-echo-keystrokes-functions' and
+`prefix-command-preserve-state-hook' allow the definition of prefix
+commands other than the predefined `C-u'.
++++
** New functions `filepos-to-bufferpos' and `bufferpos-to-filepos'.
+These allow to convert between buffer positions and the corresponding
+file byte offsets, given the file's encoding.
++++
** The default value of `load-read-function' is now `read'.
+Previously, the default value of `nil' implied using `read'.
-** New hook `pre-redisplay-functions', a bit easier to use than pre-redisplay-function.
++++
+** New hook `pre-redisplay-functions'.
+It is a bit easier to use than `pre-redisplay-function'.
++++
** The second arg of `looking-back' should always be provided explicitly.
+Previously, it was an optional argument, now it's mandatory.
-** Obsolete text properties `intangible', `point-entered', and `point-left'.
++++
+** Text properties `intangible', `point-entered', and `point-left' are obsolete.
Replaced by properties `cursor-intangible' and `cursor-sensor-functions',
implemented by the new `cursor-intangible-mode' and
`cursor-sensor-mode' minor modes.
++++
+** `inhibit-point-motion-hooks' now defaults to `t' and is obsolete.
+Use the new minor modes `cursor-intangible-mode' and
+`cursor-sensor-mode' instead.
+
++++
** 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
+++
** 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 function `macroexpand-1' to perform a single step of macroexpansion.
++++
+** New function `macroexpand-1' to perform a single step of macro expansion.
-** Some "x-*" were obsoleted:
++++
+** Some "x-*" functions were obsoleted and/or renamed:
*** x-select-text is renamed gui-select-text.
*** x-selection-value is renamed gui-selection-value.
*** x-get-selection is renamed gui-get-selection.
*** x-get-selection-value is renamed to gui-get-primary-selection.
*** x-set-selection is renamed to gui-set-selection
++++
** New function `string-greaterp', which return the opposite result of
`string-lessp'.
codeset is "UTF-8" (as in "en_US.UTF-8"). This is needed because
MS-Windows doesn't support UTF-8 as codeset in its locales.
++++
** New function `alist-get', which is also a valid place (aka lvalue).
++++
** New function `funcall-interactively', which works like `funcall'
but makes `called-interactively-p' treat the function as (you guessed it)
called interactively.
++++
** New function `function-put' to use instead of `put' for function properties.
+++
** 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 `system-name' now returns an updated value if the current
+++
** 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.
*** 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
horizontal scroll bars are available on the underlying system.
+
**** 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
scroll bars on the selected frame.
+
**** 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
`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
two specify height and type of the window's horizontal scroll bar.
+
**** `window-scroll-bars' now returns type and sizes of horizontal scroll
bars too.
+
**** New buffer-local variables `horizontal-scroll-bar' and
`scroll-bar-height'.
`window-divider-default-places', `window-divider-default-bottom-width'
and `window-divider-default-right-width'.
+---
** 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.
---
** The new function 'w32-application-type' returns the type of an
MS-Windows application given the name of its executable program file.
+** New variable `w32-pipe-buffer-size'.
+It can be used to tune the size of the buffer of pipes created for
+communicating with subprocesses, when the program run by a subprocess
+exhibits unusual buffering behavior. Default is zero, which lets the
+OS use its default size.
+
\f
----------------------------------------------------------------------
This file is part of GNU Emacs.