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This is compat.info, produced by makeinfo version 6.7 from compat.texi.
Copyright © 2022 Free Software Foundation, Inc.
Permission is granted to copy, distribute and/or modify this
document under the terms of the GNU Free Documentation License,
Version 1.3 or any later version published by the Free Software
Foundation; with no Invariant Sections, with the Front-Cover Texts
being “A GNU Manual,” and with the Back-Cover Texts as in (a)
below. A copy of the license is included in the section entitled
“GNU Free Documentation License.”
(a) The FSF’s Back-Cover Text is: “You have the freedom to copy and
modify this GNU manual.”
INFO-DIR-SECTION Emacs
START-INFO-DIR-ENTRY
* Compat: (compat). Compatibility Library for Emacs Lisp.
END-INFO-DIR-ENTRY

File: compat.info, Node: Top, Next: Introduction, Up: (dir)
"Compat" Manual
***************
This manual documents the usage of the "Compat" Emacs lisp library, the
forward-compatibility library for Emacs Lisp, corresponding to version
28.1.2.0.
Copyright © 2022 Free Software Foundation, Inc.
Permission is granted to copy, distribute and/or modify this
document under the terms of the GNU Free Documentation License,
Version 1.3 or any later version published by the Free Software
Foundation; with no Invariant Sections, with the Front-Cover Texts
being “A GNU Manual,” and with the Back-Cover Texts as in (a)
below. A copy of the license is included in the section entitled
“GNU Free Documentation License.”
(a) The FSF’s Back-Cover Text is: “You have the freedom to copy and
modify this GNU manual.”
* Menu:
* Introduction::
* Support::
* Development::
* Function Index::
* Variable Index::
— The Detailed Node Listing —
Introduction
* Overview::
* Usage::
* Intentions::
Usage
* Additional libraries::
Support
* Emacs 24.4:: Compatibility support for Emacs 24.4
* Emacs 24.5:: Compatibility support for Emacs 24.5
* Emacs 25.1:: Compatibility support for Emacs 25.1
* Emacs 26.1:: Compatibility support for Emacs 26.1
* Emacs 27.1:: Compatibility support for Emacs 27.1
* Emacs 28.1:: Compatibility support for Emacs 28.1

File: compat.info, Node: Introduction, Next: Support, Prev: Top, Up: Top
1 Introduction
**************
* Menu:
* Overview::
* Usage::
* Intentions::

File: compat.info, Node: Overview, Next: Usage, Up: Introduction
1.1 Overview
============
The objective of Compat is to provide "forwards compatibility" library
for Emacs Lisp. That is to say by using Compat, an Elisp package does
not have to make the decision to either use new and useful functionality
or support old versions of Emacs.
Version 24.3 is chosen as the oldest version, because this is the
newest version on CentOS 7. It is intended to preserve compatibility
for at least as the Centos 7 reaches EOL
(https://wiki.centos.org/About/Product), 2024.
If you are developing a package with Compat in mind, consider loading
‘compat-help‘ (on your system, not in a package) to get relevant notes
inserted into the help buffers of functions that are implemented or
advised in Compat.
Note that Compat provides a few prefixed function, ie. functions
with a ‘compat-’ prefix. These are used to provide extended
functionality for commands that are already defined (‘sort’, ‘assoc’,
‘seq’, ...). It might be possible to transform these into advised
functions later on, so that the modified functionality is accessible
without a prefix. Feedback on this point is appreciated.

File: compat.info, Node: Usage, Next: Intentions, Prev: Overview, Up: Introduction
1.2 Usage
=========
The intended use-case for this library is for package developers to add
as a dependency in the header:
;; Package-Requires: ((emacs "24.3") (compat "28.1.2.0"))
and later on a
(require 'compat)
This will load all non-prefixed definitions (functions and macros
with a leading ‘compat-‘). To load these, an additional
(require 'compat-XY) ; e.g. 26
will be necessary, to load compatibility code for Emacs version XY.
It is recommended to subscribe to the compat-announce
(https://lists.sr.ht/~pkal/compat-announce) mailing list to be notified
when new versions are released or relevant changes are made.
* Menu:
* Additional libraries::

File: compat.info, Node: Additional libraries, Up: Usage
1.2.1 Additional libraries
--------------------------
These libraries are packages with Compat, but are disabled by default.
To use them you can use ‘M-x load-library’:
compat-help
Add notes to ‘*Help*’ buffer, if a compatibility definition has
something to warn you about.
compat-font-lock
Highlight functions that are implemented as compatibility
definitions.

File: compat.info, Node: Intentions, Prev: Usage, Up: Introduction
1.3 Intentions
==============
The library intends to provide support back until Emacs 24.3. The
intended audience are package developers that are interested in using
newer developments, without having to break compatibility.
Sadly, total backwards compatibility cannot be provided for technical
reasons. These might include:
• An existing function or macro was extended by some new
functionality. To support these cases, the function or macro would
have to be advised. As this is usually regarded as invasive and is
shown to be a significant overhead, even when the new feature is
not used, this approach is not used.
As a compromise, prefixed functions and macros (starting with a
‘compat-’ prefix) can be provided.
• New functionality was implemented in the core, and depends on
external libraries that cannot be reasonably duplicated in the
scope of a compatibility library.
• New functionality depends on an entire new, non-trivial library.
Sometimes these are provided via ELPA (xref, project, ...), but
other times it would be infeasible to duplicate an entire library
within Compat while also providing the necessary backwards
compatibility.
• It just wasn’t added, and there is no good reason (though good
excuses might exist). If you happen to find such a function, *note
reporting: Development. it would be much appreciated.
Always begin by assuming that this might be the case, unless proven
otherwise.

File: compat.info, Node: Support, Next: Development, Prev: Introduction, Up: Top
2 Support
*********
This section goes into the features that Compat manages and doesn’t
manage to provide for each Emacs version.
* Menu:
* Emacs 24.4:: Compatibility support for Emacs 24.4
* Emacs 24.5:: Compatibility support for Emacs 24.5
* Emacs 25.1:: Compatibility support for Emacs 25.1
* Emacs 26.1:: Compatibility support for Emacs 26.1
* Emacs 27.1:: Compatibility support for Emacs 27.1
* Emacs 28.1:: Compatibility support for Emacs 28.1

File: compat.info, Node: Emacs 24.4, Next: Emacs 24.5, Up: Support
2.1 Emacs 24.4
==============
The following functions and macros implemented in 24.4, and are provided
by Compat by default:
-- Macro: with-eval-after-load
See *note (elisp) Hooks for Loading: (elisp)Hooks for Loading.
-- Function: special-form-p
See *note (elisp) Special Forms: (elisp)Special Forms.
-- Function: macrop
See *note (elisp) Simple Macro: (elisp)Simple Macro.
-- Function: string-suffix-p
See *note (elisp) Text Comparison: (elisp)Text Comparison.
-- Function: delete-consecutive-dups
Defined in ‘subr.el’.
-- Function: define-error
See *note (elisp) Error Symbols: (elisp)Error Symbols.
-- Function: bool-vector-exclusive-or
See *note (elisp) Bool-Vectors: (elisp)Bool-Vectors.
-- Function: bool-vector-union
See *note (elisp) Bool-Vectors: (elisp)Bool-Vectors.
-- Function: bool-vector-intersection
See *note (elisp) Bool-Vectors: (elisp)Bool-Vectors.
-- Function: bool-vector-not
See *note (elisp) Bool-Vectors: (elisp)Bool-Vectors.
-- Function: bool-vector-subsetp
See *note (elisp) Bool-Vectors: (elisp)Bool-Vectors.
-- Function: bool-vector-count-consecutive
See *note (elisp) Bool-Vectors: (elisp)Bool-Vectors.
-- Function: bool-vector-count-population
See *note (elisp) Bool-Vectors: (elisp)Bool-Vectors.
-- Function: completion-table-merge
See *note (elisp) Basic Completion: (elisp)Basic Completion.
-- Function: completion-table-with-cache
See *note (elisp) Programmed Completion: (elisp)Programmed
Completion.
-- Function: face-spec-set
See *note (elisp) Defining Faces: (elisp)Defining Faces.
These functions are prefixed with ‘compat’ prefix, and are only
loaded when ‘compat-24’ is required:
-- Function: compat-=
-- Function: compat-<
-- Function: compat->
-- Function: compat-<=
-- Function: compat->=
See *note (elisp) Comparison of Numbers: (elisp)Comparison of
Numbers.
Allows for more than two arguments to be compared.
-- Function: compat-split-string
See *note (elisp) Creating Strings: (elisp)Creating Strings.
Takes optional argument TRIM.
Compat does not provide support for the following Lisp features
implemented in 24.4:
• Allowing the second optional argument to ‘eval’ to specify a
lexical environment.
• The ‘define-alternatives’ macro.
• Support for the ‘defalias-fset-function’ symbol property.
• The ‘group-gid’ and ‘groupd-read-gid’ functions.
• The ‘pre-redisplay-function’ hook.
• Allowing for ‘with-demoted-errors’ to take a additional argument
‘format’.
• The ‘face-spec-set’ function.
• The ‘add-face-text-property’ function.
• No ‘tty-setup-hook’ hook.
• The ‘get-pos-property’ function.
• The ‘define-advice’ macro.
• Support for generators.
• The ‘string-trim’, ‘string-trim-left’ and ‘string-trim-right’
functions. These are instead provided as prefixed function as part
of *note Emacs 26.1:: support.

File: compat.info, Node: Emacs 24.5, Next: Emacs 25.1, Prev: Emacs 24.4, Up: Support
2.2 Emacs 24.5
==============
No special support for 24.5 was deemed necessary.

File: compat.info, Node: Emacs 25.1, Next: Emacs 26.1, Prev: Emacs 24.5, Up: Support
2.3 Emacs 25.1
==============
The following functions and macros implemented in 25.1, and are provided
by Compat by default:
-- Function: format-message
See *note (elisp) Formatting Strings: (elisp)Formatting Strings.
-- Function: directory-name-p
See *note (elisp) Directory Names: (elisp)Directory Names.
-- Function: string-greaterp
See *note (elisp) Text Comparison: (elisp)Text Comparison.
-- Macro: with-file-modes
See *note (elisp) Changing Files: (elisp)Changing Files.
-- Function: alist-get
See *note (elisp) Association Lists: (elisp)Association Lists.
-- Macro: if-let
Defined in ‘subr-x.el’.
-- Macro: when-let
Defined in ‘subr-x.el’.
-- Macro: thread-first
Defined in ‘subr-x.el’.
-- Macro: thread-last
Defined in ‘subr-x.el’.
-- Function: macroexpand-1
See *note (elisp) Expansion: (elisp)Expansion.
-- Function: directory-files-recursively
See *note (elisp) Contents of Directories: (elisp)Contents of
Directories.
-- Function: bool-vector
See *note (elisp) Bool-Vectors: (elisp)Bool-Vectors.
These functions are prefixed with ‘compat’ prefix, and are only
loaded when ‘compat-25’ is required:
-- Function: compat-sort
See *note (elisp) Sequence Functions: (elisp)Sequence Functions.
Adds support for vectors to be sorted, next to just lists.
Compat does not provide support for the following Lisp features
implemented in 25.1:
• New ‘pcase’ patterns.
• The hook ‘prefix-command-echo-keystrokes-functions’ and
‘prefix-command-preserve-state-hook’.
• The hook ‘pre-redisplay-functions’.
• The function ‘make-process’.
• Support for the variable ‘inhibit-message’.
• The ‘define-inline’ functionality.
• The functions ‘string-collate-lessp’ and ‘string-collate-equalp’.
• Support for ‘alist-get’ as a generalised variable.
• The function ‘funcall-interactivly’.
• The function ‘buffer-substring-with-bidi-context’.
• The function ‘font-info’.
• The function ‘default-font-width’.
• The function ‘window-font-height’ and ‘window-font-width’.
• The function ‘window-max-chars-per-line’.
• The function ‘set-binary-mode’.
• The functions ‘bufferpos-to-filepos’ and ‘filepos-to-bufferpos’.
Note that the changes in Emacs 25.2 and 25.3 are also included here,
for the sake of simplicity.

File: compat.info, Node: Emacs 26.1, Next: Emacs 27.1, Prev: Emacs 25.1, Up: Support
2.4 Emacs 26.1
==============
The following functions and macros implemented in 26.1, and are provided
by Compat by default:
-- Function: func-arity
See *note (elisp) What Is a Function: (elisp)What Is a Function.
-- Function: mapcan
See *note (elisp) Mapping Functions: (elisp)Mapping Functions.
-- Function: cXXXr
-- Function: cXXXXr
See *note (elisp) List Elements: (elisp)List Elements.
-- Variable: gensym-counter
See ‘gensym’.
-- Function: gensym
See *note (elisp) Creating Symbols: (elisp)Creating Symbols.
-- Function: make-nearby-temp-file
See *note (elisp) Unique File Names: (elisp)Unique File Names.
-- Variable: mounted-file-systems
Defined in ‘files.el’.
-- Function: temporary-file-directory
See *note (elisp) Unique File Names: (elisp)Unique File Names.
-- Macro: if-let*
Defined in ‘subr-x.el’.
-- Macro: when-let*
Defined in ‘subr-x.el’.
-- Macro: and-let*
Defined in ‘subr-x.el’.
**Please Note:** The implementation provided by Compat does not
include a bug that was observed with Emacs 26 (see
<https://debbugs.gnu.org/cgi/bugreport.cgi?bug=31840>).
-- Function: file-local-name
See *note (elisp) Magic File Names: (elisp)Magic File Names.
-- Function: file-name-quoted-p
See *note (elisp) File Name Expansion: (elisp)File Name Expansion.
-- Function: file-name-quote
See *note (elisp) File Name Expansion: (elisp)File Name Expansion.
-- Function: image-property
Defined in ‘image.el’.
This function can also be used as a generalised variable. To use
this you need to explicitly require ‘compat-26’.
-- Function: file-attribute-type
See *note (elisp) File Attributes: (elisp)File Attributes.
-- Function: file-attribute-link-number
See *note (elisp) File Attributes: (elisp)File Attributes.
-- Function: file-attribute-user-id
See *note (elisp) File Attributes: (elisp)File Attributes.
-- Function: file-attribute-group-id
See *note (elisp) File Attributes: (elisp)File Attributes.
-- Function: file-attribute-access-time
See *note (elisp) File Attributes: (elisp)File Attributes.
-- Function: file-attribute-modification-time
See *note (elisp) File Attributes: (elisp)File Attributes.
-- Function: file-attribute-status-change-time
See *note (elisp) File Attributes: (elisp)File Attributes.
-- Function: file-attribute-size
See *note (elisp) File Attributes: (elisp)File Attributes.
-- Function: file-attribute-modes
See *note (elisp) File Attributes: (elisp)File Attributes.
-- Function: file-attribute-inode-number
See *note (elisp) File Attributes: (elisp)File Attributes.
-- Function: file-attribute-device-number
See *note (elisp) File Attributes: (elisp)File Attributes.
-- Function: file-attribute-collect
Defined in ‘files.el’.
These functions are prefixed with ‘compat’ prefix, and are only
loaded when ‘compat-26’ is required:
-- Function: compat-assoc
See *note (elisp) Association Lists: (elisp)Association Lists.
Handle the optional argument TESTFN.
-- Function: compat-line-number-at-pos
See *note (elisp) Text Lines: (elisp)Text Lines.
Handle the optional argument ABSOLUTE.
-- Function: compat-alist-get
See *note (elisp) Association Lists: (elisp)Association Lists.
Handle the optional argument TESTFN. Can also be used as a
generalised variable.
-- Function: compat-string-trim-left
See *note (elisp) Creating Strings: (elisp)Creating Strings.
Handles the optional argument REGEXP.
-- Function: compat-string-trim-right
See *note (elisp) Creating Strings: (elisp)Creating Strings.
Handles the optional argument REGEXP.
-- Function: compat-string-trim
See *note (elisp) Creating Strings: (elisp)Creating Strings.
Handles the optional arguments TRIM-LEFT and TRIM-RIGHT.
Compat does not provide support for the following Lisp features
implemented in 26.1:
• The function ‘secure-hash-algorithms’.
• The function ‘gnutls-avalaible-p’.
• Support for records and record functions.
• The function ‘mapbacktrace’.
• The function ‘file-name-case-insensitive-p’.
• The file-attributes constructors.
• The function ‘read-multiple-choice’.
• The additional elements of ‘parse-partial-sexp’.
• The function ‘add-variable-watcher’.
• The function ‘undo-amalgamate-change-group’.
• The function ‘char-from-name’
• Signalling errors when ‘length’ or ‘member’ deal with list cycles.
• The function ‘frame-list-z-order’.
• The function ‘frame-restack’.
• Support for side windows and atomic windows.
• All changes related to ‘display-buffer’.
• The function ‘window-swap-states’.
Note that the changes in Emacs 26.2 and 26.3 are also included here,
for the sake of simplicity.

File: compat.info, Node: Emacs 27.1, Next: Emacs 28.1, Prev: Emacs 26.1, Up: Support
2.5 Emacs 27.1
==============
The following functions and macros implemented in 27.1, and are provided
by Compat by default:
-- Function: proper-list-p
See *note (elisp) List-related Predicates: (elisp)List-related
Predicates.
-- Function: string-distance
See *note (elisp) Text Comparison: (elisp)Text Comparison.
-- Function: json-serialize
See *note (elisp) Parsing JSON: (elisp)Parsing JSON.
-- Function: json-insert
See *note (elisp) Parsing JSON: (elisp)Parsing JSON.
-- Function: json-parse-string
See *note (elisp) Parsing JSON: (elisp)Parsing JSON.
-- Function: json-parse-buffer
See *note (elisp) Parsing JSON: (elisp)Parsing JSON.
-- Macro: ignore-error
See *note (elisp) Handling Errors: (elisp)Handling Errors.
-- Macro: dolist-with-progress-reporter
See *note (elisp) Progress: (elisp)Progress.
-- Function: flatten-tree
See *note (elisp) Building Lists: (elisp)Building Lists.
-- Function: xor
See *note (elisp) Combining Conditions: (elisp)Combining
Conditions.
-- Variable: regexp-unmatchable
Defined in ‘subr.el’.
-- Function: decoded-time-second
Defined in ‘simple.el’.
-- Function: decoded-time-minute
Defined in ‘simple.el’.
-- Function: decoded-time-hour
Defined in ‘simple.el’.
-- Function: decoded-time-day
Defined in ‘simple.el’.
-- Function: decoded-time-month
Defined in ‘simple.el’.
-- Function: decoded-time-year
Defined in ‘simple.el’.
-- Function: decoded-time-weekday
Defined in ‘simple.el’.
-- Function: decoded-time-dst
Defined in ‘simple.el’.
-- Function: decoded-time-zone
Defined in ‘simple.el’.
-- Function: package-get-version
Defined in ‘package.el’.
-- Function: time-equal-p
See *note (elisp) Time Calculations: (elisp)Time Calculations.
-- Function: date-days-in-month
See *note (elisp) Time Calculations: (elisp)Time Calculations.
-- Function: exec-path
See *note (elisp) Subprocess Creation: (elisp)Subprocess Creation.
This function requires the ‘time-date’ feature to be loaded.
These functions are prefixed with ‘compat’ prefix, and are only
loaded when ‘compat-27’ is required:
-- Function: compat-recenter
See *note (elisp) Textual Scrolling: (elisp)Textual Scrolling.
Adds the optional argument REDISPLAY.
-- Function: compat-lookup-key
See *note (elisp) Low-Level Key Binding: (elisp)Low-Level Key
Binding.
Allows KEYMAP to be a list of keymaps.
-- Macro: compat-setq-local
See *note (elisp) Creating Buffer-Local: (elisp)Creating
Buffer-Local.
Allow for more than one variable to be set.
-- Function: compat-regexp-opt
See *note (elisp) Regexp Functions: (elisp)Regexp Functions.
Handle an empty list of strings.
-- Function: compat-file-size-human-readable
Defined in ‘files.el’.
Handle the optional third (SPACE) and forth (UNIT) arguments.
-- Function: compat-assoc-delete-all
See *note (elisp) Association Lists: (elisp)Association Lists.
Handle the optional third (TESTFN) argument.
-- Function: compat-executable-find
*note (elisp) Locating Files: (elisp)Locating Files.
Handle the optional second (REMOTE) argument.
-- Function: compat-dired-get-marked-files
Defined in ‘dired.el’
Handles the optional fifth (ERROR) argument.
Compat does not provide support for the following Lisp features
implemented in 27.1:
• Bigint support.
• The function ‘time-convert’.
• All ‘iso8601-*’ functions.
• The macro ‘benchmark-progn’.
• The function ‘read-char-from-minibuffer’.
• The minor mode ‘reveal-mode’.
• The macro ‘with-suppressed-warnings’.
• Support for ‘condition-case’ to handle t.
• The functions ‘major-mode-suspend’ and ‘major-mode-restore’.
• The function ‘provided-mode-derived-p’.
• The function ‘file-system-info’.
• The more consistent treatment of NaN values.
• The function ‘ring-resize’.
• The function ‘group-name’.
• Additional ‘format-spec’ modifiers.
• Support for additional body forms for
‘define-globalized-minor-mode’.
• The macro ‘with-connection-local-variables’ and related
functionality.
Note that the changes in Emacs 27.2 are also included here, for the
sake of simplicity.

File: compat.info, Node: Emacs 28.1, Prev: Emacs 27.1, Up: Support
2.6 Emacs 28.1
==============
The following functions and macros implemented in 28.1, and are provided
by Compat by default:
-- Function: string-search
See *note (elisp) Text Comparison: (elisp)Text Comparison.
-- Function: length=
See *note (elisp) Sequence Functions: (elisp)Sequence Functions.
-- Function: length<
See *note (elisp) Sequence Functions: (elisp)Sequence Functions.
-- Function: length>
See *note (elisp) Sequence Functions: (elisp)Sequence Functions.
-- Function: file-name-concat
See *note (elisp) Directory Names: (elisp)Directory Names.
-- Function: garbage-collect-maybe
Defined in ‘alloc.c’.
-- Function: string-replace
See *note (elisp) Search and Replace: (elisp)Search and Replace.
-- Function: always
*note (elisp) Calling Functions: (elisp)Calling Functions.
-- Function: insert-into-buffer
See *note (elisp) Insertion: (elisp)Insertion.
-- Function: replace-regexp-in-region
See *note (elisp) Search and Replace: (elisp)Search and Replace.
-- Function: replace-string-in-region
See *note (elisp) Search and Replace: (elisp)Search and Replace.
-- Function: buffer-local-boundp
See *note (elisp) Creating Buffer-Local: (elisp)Creating
Buffer-Local.
-- Function: with-existing-directory
See *note (elisp) Testing Accessibility: (elisp)Testing
Accessibility.
-- Macro: dlet
See *note (elisp) Local Variables: (elisp)Local Variables.
-- Function: ensure-list
See *note (elisp) Building Lists: (elisp)Building Lists.
-- Function: string-clean-whitespace
See *note (elisp) Creating Strings: (elisp)Creating Strings.
-- Function: string-fill
See *note (elisp) Creating Strings: (elisp)Creating Strings.
-- Function: string-lines
See *note (elisp) Creating Strings: (elisp)Creating Strings.
-- Function: string-pad
See *note (elisp) Creating Strings: (elisp)Creating Strings.
-- Function: string-chop-newline
See *note (elisp) Creating Strings: (elisp)Creating Strings.
-- Macro: named-let
See *note (elisp) Local Variables: (elisp)Local Variables.
-- Function: file-name-with-extension
See *note (elisp) File Name Components: (elisp)File Name
Components.
-- Function: directory-empty-p
See *note (elisp) Contents of Directories: (elisp)Contents of
Directories.
-- Function: format-prompt
See *note (elisp) Text from Minibuffer: (elisp)Text from
Minibuffer.
-- Function: thing-at-mouse
Defined in ‘thingatpt.el’.
-- Function: macroexp-file-name
Defined in ‘macroexp’.
-- Macro: with-environment-variables
See *note (elisp) System Environment: (elisp)System Environment.
-- Function: button-buttonize
Defined in ‘button.el’.
-- Function: make-directory-autoloads
See *note (elisp) Autoload: (elisp)Autoload.
-- Function: color-values-from-color-spec
Defined in ‘xfaces.c’.
-- Function: file-modes-number-to-symbolic
See *note (elisp) Changing Files: (elisp)Changing Files.
-- Function: file-backup-file-names
See *note (elisp) Backup Names: (elisp)Backup Names.
-- Function: make-lock-file-name
Defined in ‘files.el’.
-- Function: null-device
Defined in ‘files.el’.
-- Function: decoded-time-period
Defined in ‘time-data.el’.
-- Function: subr-primitive-p
Defined in ‘subr.el’.
These functions are prefixed with ‘compat’ prefix, and are only
loaded when ‘compat-28’ is required:
-- Function: compat-unlock-buffer
See *note (elisp) File Locks: (elisp)File Locks.
Handle ‘file-error’ conditions.
-- Function: compat-string-width
See *note (elisp) Size of Displayed Text: (elisp)Size of Displayed
Text.
Handle optional arguments FROM and TO.
-- Function: compat-json-serialize
See *note (elisp) Parsing JSON: (elisp)Parsing JSON.
Handle primitive, top-level JSON values.
-- Function: compat-json-insert
See *note (elisp) Parsing JSON: (elisp)Parsing JSON.
Handle primitive, top-level JSON values.
-- Function: compat-json-parse-string
See *note (elisp) Parsing JSON: (elisp)Parsing JSON.
Handle primitive, top-level JSON values.
-- Function: compat-json-parse-buffer
See *note (elisp) Parsing JSON: (elisp)Parsing JSON.
Handle primitive, top-level JSON values.
-- Function: compat-count-windows
Defined in ‘window.el’.
Handle optional argument ALL-FRAMES.
Compat does not provide support for the following Lisp features
implemented in 28.1:
• Support for ‘interactive’ or ‘declare’ to list applicable modes.
• Support for ‘:interactive’ argument to ‘define-minor-mode’ and
‘define-derived-mode’.
• Support for ‘:predicate’ argument to
‘define-globalized-minor-mode’.
• "Success handler" for ‘condition-case’.
• The function ‘benchmark-call’.
• Support for the ‘natnum’ defcustom type.
• The function ‘macroexp-compiling-p’.
• The function ‘macroexp-warn-and-return’.
• Additional Edebug keywords.
• Shorthand support.
• The function ‘custom-add-choice’.
• The function ‘decoded-time-period’.
• The function ‘dom-print’.
• The function ‘dom-remove-attribute’.
• The function ‘dns-query-asynchronous’.
• The function ‘get-locale-names’.
• The function ‘json-avaliable-p’.
• The function ‘mail-header-parse-addresses-lax’.
• The function ‘mail-header-parse-address-lax’.
• The function ‘make-separator-line’.
• The function ‘num-processors’.
• The function ‘object-intervals’.
• The function ‘process-lines-ignore-status’.
• The function ‘require-theme’.
• The function ‘syntax-class-to-char’.
• The function ‘null-device’ and ‘path-separator’.

File: compat.info, Node: Development, Next: Function Index, Prev: Support, Up: Top
3 Development
*************
Compat is developed on SourceHut (https://sr.ht/~pkal/compat). A
restricted GitHub mirror (https://github.com/phikal/compat.el) is also
maintained.
Patches and comments can be sent to the development mailing list
(https://lists.sr.ht/~pkal/compat-devel) (~pkal/compat-devel@lists.sr.ht
<~pkal/compat-devel@lists.sr.ht>). Bug reports are best sent to the
issue tracker (https://todo.sr.ht/~pkal/compat) (~pkal/compat@todo.sr.ht
<~pkal/compat@todo.sr.ht>). The GitHub mirror can also be used to
submit patches. These may include issues in the compatibility code,
missing definitions or performance issues.
Please note that as a GNU ELPA package, Compat requires contributors
to have signed the FSF copyright assignment
(https://www.gnu.org/software/emacs/manual/html_node/emacs/Copyright-Assignment.html),
before any non-trivial contribution (roughly 15 lines of code) can be
applied.

File: compat.info, Node: Function Index, Next: Variable Index, Prev: Development, Up: Top
Appendix A Function Index
*************************
[index]
* Menu:
* alist-get: Emacs 25.1. (line 21)
* always: Emacs 28.1. (line 30)
* and-let*: Emacs 26.1. (line 40)
* bool-vector: Emacs 25.1. (line 43)
* bool-vector-count-consecutive: Emacs 24.4. (line 42)
* bool-vector-count-population: Emacs 24.4. (line 45)
* bool-vector-exclusive-or: Emacs 24.4. (line 27)
* bool-vector-intersection: Emacs 24.4. (line 33)
* bool-vector-not: Emacs 24.4. (line 36)
* bool-vector-subsetp: Emacs 24.4. (line 39)
* bool-vector-union: Emacs 24.4. (line 30)
* buffer-local-boundp: Emacs 28.1. (line 42)
* button-buttonize: Emacs 28.1. (line 95)
* color-values-from-color-spec: Emacs 28.1. (line 101)
* compat-<: Emacs 24.4. (line 62)
* compat-<=: Emacs 24.4. (line 64)
* compat-=: Emacs 24.4. (line 61)
* compat->: Emacs 24.4. (line 63)
* compat->=: Emacs 24.4. (line 65)
* compat-alist-get: Emacs 26.1. (line 111)
* compat-assoc: Emacs 26.1. (line 101)
* compat-assoc-delete-all: Emacs 27.1. (line 115)
* compat-count-windows: Emacs 28.1. (line 156)
* compat-dired-get-marked-files: Emacs 27.1. (line 125)
* compat-executable-find: Emacs 27.1. (line 120)
* compat-file-size-human-readable: Emacs 27.1. (line 110)
* compat-json-insert: Emacs 28.1. (line 141)
* compat-json-parse-buffer: Emacs 28.1. (line 151)
* compat-json-parse-string: Emacs 28.1. (line 146)
* compat-json-serialize: Emacs 28.1. (line 136)
* compat-line-number-at-pos: Emacs 26.1. (line 106)
* compat-lookup-key: Emacs 27.1. (line 93)
* compat-recenter: Emacs 27.1. (line 88)
* compat-regexp-opt: Emacs 27.1. (line 105)
* compat-setq-local: Emacs 27.1. (line 99)
* compat-sort: Emacs 25.1. (line 49)
* compat-split-string: Emacs 24.4. (line 71)
* compat-string-trim: Emacs 26.1. (line 127)
* compat-string-trim-left: Emacs 26.1. (line 117)
* compat-string-trim-right: Emacs 26.1. (line 122)
* compat-string-width: Emacs 28.1. (line 130)
* compat-unlock-buffer: Emacs 28.1. (line 125)
* completion-table-merge: Emacs 24.4. (line 48)
* completion-table-with-cache: Emacs 24.4. (line 51)
* cXXXr: Emacs 26.1. (line 15)
* cXXXXr: Emacs 26.1. (line 16)
* date-days-in-month: Emacs 27.1. (line 77)
* decoded-time-day: Emacs 27.1. (line 53)
* decoded-time-dst: Emacs 27.1. (line 65)
* decoded-time-hour: Emacs 27.1. (line 50)
* decoded-time-minute: Emacs 27.1. (line 47)
* decoded-time-month: Emacs 27.1. (line 56)
* decoded-time-period: Emacs 28.1. (line 116)
* decoded-time-second: Emacs 27.1. (line 44)
* decoded-time-weekday: Emacs 27.1. (line 62)
* decoded-time-year: Emacs 27.1. (line 59)
* decoded-time-zone: Emacs 27.1. (line 68)
* define-error: Emacs 24.4. (line 24)
* delete-consecutive-dups: Emacs 24.4. (line 21)
* directory-empty-p: Emacs 28.1. (line 78)
* directory-files-recursively: Emacs 25.1. (line 39)
* directory-name-p: Emacs 25.1. (line 12)
* dlet: Emacs 28.1. (line 50)
* dolist-with-progress-reporter: Emacs 27.1. (line 31)
* ensure-list: Emacs 28.1. (line 53)
* exec-path: Emacs 27.1. (line 80)
* face-spec-set: Emacs 24.4. (line 55)
* file-attribute-access-time: Emacs 26.1. (line 74)
* file-attribute-collect: Emacs 26.1. (line 95)
* file-attribute-device-number: Emacs 26.1. (line 92)
* file-attribute-group-id: Emacs 26.1. (line 71)
* file-attribute-inode-number: Emacs 26.1. (line 89)
* file-attribute-link-number: Emacs 26.1. (line 65)
* file-attribute-modes: Emacs 26.1. (line 86)
* file-attribute-modification-time: Emacs 26.1. (line 77)
* file-attribute-size: Emacs 26.1. (line 83)
* file-attribute-status-change-time: Emacs 26.1. (line 80)
* file-attribute-type: Emacs 26.1. (line 62)
* file-attribute-user-id: Emacs 26.1. (line 68)
* file-backup-file-names: Emacs 28.1. (line 107)
* file-local-name: Emacs 26.1. (line 47)
* file-modes-number-to-symbolic: Emacs 28.1. (line 104)
* file-name-concat: Emacs 28.1. (line 21)
* file-name-quote: Emacs 26.1. (line 53)
* file-name-quoted-p: Emacs 26.1. (line 50)
* file-name-with-extension: Emacs 28.1. (line 74)
* flatten-tree: Emacs 27.1. (line 34)
* format-message: Emacs 25.1. (line 9)
* format-prompt: Emacs 28.1. (line 82)
* func-arity: Emacs 26.1. (line 9)
* garbage-collect-maybe: Emacs 28.1. (line 24)
* gensym: Emacs 26.1. (line 22)
* if-let: Emacs 25.1. (line 24)
* if-let*: Emacs 26.1. (line 34)
* ignore-error: Emacs 27.1. (line 28)
* image-property: Emacs 26.1. (line 56)
* insert-into-buffer: Emacs 28.1. (line 33)
* json-insert: Emacs 27.1. (line 19)
* json-parse-buffer: Emacs 27.1. (line 25)
* json-parse-string: Emacs 27.1. (line 22)
* json-serialize: Emacs 27.1. (line 16)
* length<: Emacs 28.1. (line 15)
* length=: Emacs 28.1. (line 12)
* length>: Emacs 28.1. (line 18)
* macroexp-file-name: Emacs 28.1. (line 89)
* macroexpand-1: Emacs 25.1. (line 36)
* macrop: Emacs 24.4. (line 15)
* make-directory-autoloads: Emacs 28.1. (line 98)
* make-lock-file-name: Emacs 28.1. (line 110)
* make-nearby-temp-file: Emacs 26.1. (line 25)
* mapcan: Emacs 26.1. (line 12)
* named-let: Emacs 28.1. (line 71)
* null-device: Emacs 28.1. (line 113)
* package-get-version: Emacs 27.1. (line 71)
* proper-list-p: Emacs 27.1. (line 9)
* replace-regexp-in-region: Emacs 28.1. (line 36)
* replace-string-in-region: Emacs 28.1. (line 39)
* special-form-p: Emacs 24.4. (line 12)
* string-chop-newline: Emacs 28.1. (line 68)
* string-clean-whitespace: Emacs 28.1. (line 56)
* string-distance: Emacs 27.1. (line 13)
* string-fill: Emacs 28.1. (line 59)
* string-greaterp: Emacs 25.1. (line 15)
* string-lines: Emacs 28.1. (line 62)
* string-pad: Emacs 28.1. (line 65)
* string-replace: Emacs 28.1. (line 27)
* string-search: Emacs 28.1. (line 9)
* string-suffix-p: Emacs 24.4. (line 18)
* subr-primitive-p: Emacs 28.1. (line 119)
* temporary-file-directory: Emacs 26.1. (line 31)
* thing-at-mouse: Emacs 28.1. (line 86)
* thread-first: Emacs 25.1. (line 30)
* thread-last: Emacs 25.1. (line 33)
* time-equal-p: Emacs 27.1. (line 74)
* when-let: Emacs 25.1. (line 27)
* when-let*: Emacs 26.1. (line 37)
* with-environment-variables: Emacs 28.1. (line 92)
* with-eval-after-load: Emacs 24.4. (line 9)
* with-existing-directory: Emacs 28.1. (line 46)
* with-file-modes: Emacs 25.1. (line 18)
* xor: Emacs 27.1. (line 37)

File: compat.info, Node: Variable Index, Prev: Function Index, Up: Top
Appendix B Variable Index
*************************
[index]
* Menu:
* gensym-counter: Emacs 26.1. (line 19)
* mounted-file-systems: Emacs 26.1. (line 28)
* regexp-unmatchable: Emacs 27.1. (line 41)

Tag Table:
Node: Top821
Node: Introduction2344
Node: Overview2503
Node: Usage3726
Node: Additional libraries4514
Node: Intentions4969
Node: Support6579
Node: Emacs 24.47231
Node: Emacs 24.510391
Node: Emacs 25.110565
Node: Emacs 26.113160
Node: Emacs 27.118253
Node: Emacs 28.122838
Node: Development28861
Node: Function Index29876
Node: Variable Index40341

End Tag Table

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