138 lines
4.9 KiB
Text
138 lines
4.9 KiB
Text
@c -*-texinfo-*-
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@c This is part of the GNU Emacs Lisp Reference Manual.
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@c Copyright (C) 1999, 2002, 2003, 2004, 2005,
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@c 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
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@c See the file elisp.texi for copying conditions.
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@c This node must have no pointers.
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@node Antinews, GNU Free Documentation License, System Interface, Top
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@appendix Emacs 22 Antinews
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For those users who live backwards in time, here is information about
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downgrading to Emacs version 22.3. We hope you will enjoy the greater
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simplicity that results from the absence of many Emacs @value{EMACSVER}
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features.
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@section Old Lisp Features in Emacs 22
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@itemize @bullet
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@item
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The internal character representation in Emacs is no longer
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Unicode-based; it is known as @code{emacs-mule}. This representation
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can handle several different variants of the same character, each one
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belonging to its own script. It marks each character with its script,
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to better discern them from one another.
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@item
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The @code{functionp} function now returns @code{t} for special forms.
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@item
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The @code{^} interactive spec code has been removed, together with the
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function @code{handle-shift-selection} and the variable
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@code{this-command-keys-shift-translated}. Shift-translated keys are
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no longer treated specially, making Emacs' handling of keybindings
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that much more consistent.
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@item
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The @code{interactive-form} symbol property is no longer recognized.
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Once you supply a function with an interactive form, the only way to
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change it is to redefine the function.
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@item
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Emacs no longer creates temporarily-active regions by giving the
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variable @code{transient-mark-mode} values of the form @code{(only
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. @var{oldvar})}. Instead, it uses a more slightly more complicated
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scheme: setting @code{transient-mark-mode} to @code{only} enables
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Transient Mark mode for the following command only, during which the
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value of @code{transient-mark-mode} is set to @code{identity}; if it
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is still @code{identity} at the end of the command, Transient Mark
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mode is disabled.
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@item
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Many minibuffer functions, such as @code{read-file-name} and
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@code{minibuffer-complete}, have been rewritten in C. The completion
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code has been considerably simplified; for instance, the completion
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style cannot be changed via @code{completion-styles-alist}, and
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@code{completing-read} no longer recognizes the special values
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@code{confirm-only} and @code{confirm-after-completion} for its
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@var{require-match} argument.
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@item
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Explicitly numbered groups in regular expressions are no longer
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supported.
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@item
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Faces can no longer be remapped.
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@item
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Fonts are no longer represented using a special set of ``font'' data
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types. Lisp programs may only specify fonts by name, as strings
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following the XLFD (X logical font descriptor) format.
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@item
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Display terminals are no longer represented using a ``terminal'' data
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type. This data type is not necessary, because Emacs can no longer
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display on graphical and text-only terminals simultaneously. For the
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same reason, the @code{window-system} variable is no longer
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frame-local, and the @code{window-system} function has been removed.
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@item
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The functions @code{list-system-processes} and
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@code{process-attributes} have been removed. To get information about
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system processes, call an external program, such as @command{ps}.
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@item
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Variables can now be both buffer-local and frame-local; buffer-local
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bindings take precedence over frame-local bindings.
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@item
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Windows no longer have parameters.
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@item
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The function @code{locate-user-emacs-file} and the variable
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@code{user-emacs-directory} have been removed. Programs can instead
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use hard-coded values pointing to @file{~/.emacs.d}.
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@item
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@code{vertical-motion} can no longer be told to move to a specific
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column; it always puts point on the first column of a line.
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@item
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Emacs no longer recognizes the @code{permanent-local-hook} property of
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local hook functions.
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@item
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The @code{ignore-errors} macro has been moved into the @code{cl}
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package.
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@item
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The @code{mode-name} variable now accepts only string values, and
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cannot take the form of a mode-line construct.
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@item
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Several keymap have been eliminated: @code{input-decode-map},
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@code{local-function-key-map}, @code{search-map},
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@code{multi-query-replace-map}, and
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@code{minibuffer-local-shell-command-map}.
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@item
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Many functions have been removed, including @code{emacs-init-time},
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@code{emacs-uptime}, @code{buffer-swap-text}, @code{use-region-p} and
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@code{region-active-p}, @code{start-file-process},
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@code{process-lines}, @code{image-refresh},
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@code{match-substitute-replacement}, @code{word-search-forward-lax},
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and @code{word-search-backward-lax}.
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@item
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Many variables have been removed, including @code{read-circle},
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@code{before-init-time} and @code{after-init-time},
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@code{generate-autoload-cookie}, @code{file-local-variables-alist},
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@code{replace-search-function} and @code{replace-re-search-function},
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@code{inhibit-changing-match-data}, @code{wrap-prefix} and
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@code{line-prefix},
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@end itemize
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@ignore
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arch-tag: 1d0ef137-2bad-430e-ae8e-d820d569b5a6
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@end ignore
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