@setfilename ../info/cl
@settitle Common Lisp Extensions
-@dircategory Emacs
-@direntry
-* CL: (cl). Partial Common Lisp support for Emacs Lisp.
-@end direntry
-
-@iftex
-@finalout
-@end iftex
-
-@ifinfo
+@copying
This file documents the GNU Emacs Common Lisp emulation package.
-Copyright (C) 1993 Free Software Foundation, Inc.
-
+Copyright (C) 1993, 2002, 2005 Free Software Foundation, Inc.
+@quotation
Permission is granted to copy, distribute and/or modify this document
under the terms of the GNU Free Documentation License, Version 1.1 or
any later version published by the Free Software Foundation; with no
Documentation License. If you want to distribute this document
separately from the collection, you can do so by adding a copy of the
license to the document, as described in section 6 of the license.
-@end ifinfo
+@end quotation
+@end copying
+
+@dircategory Emacs
+@direntry
+* CL: (cl). Partial Common Lisp support for Emacs Lisp.
+@end direntry
+
+@finalout
@titlepage
@sp 6
@center Dave Gillespie
@center daveg@@synaptics.com
@page
-
@vskip 0pt plus 1filll
-Copyright @copyright{} 1993 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 1.1 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'' in the Emacs manual.
-
-(a) The FSF's Back-Cover Text is: ``You have freedom to copy and modify
-this GNU Manual, like GNU software. Copies published by the Free
-Software Foundation raise funds for GNU development.''
-
-This document is part of a collection distributed under the GNU Free
-Documentation License. If you want to distribute this document
-separately from the collection, you can do so by adding a copy of the
-license to the document, as described in section 6 of the license.
+@insertcopying
@end titlepage
@node Top, Overview, (dir), (dir)
-@chapter Common Lisp Extensions
+@chapter Introduction
@noindent
This document describes a set of Emacs Lisp facilities borrowed from
@end menu
@node Overview, Program Structure, Top, Top
-@ifinfo
+@ifnottex
@chapter Overview
-@end ifinfo
-@iftex
-@section Overview
-@end iftex
+@end ifnottex
@noindent
Common Lisp is a huge language, and Common Lisp systems tend to be
implementation of Common Lisp, @dfn{CL} adds enough functionality
to make Emacs Lisp programming significantly more convenient.
+@strong{Please note:} the @dfn{CL} functions are not standard parts of
+the Emacs Lisp name space, so it is legitimate for users to define
+them with other, conflicting meanings. To avoid conflicting with
+those user activities, we have a policy that packages installed in
+Emacs must not load @dfn{CL} at run time. (It is ok for them to load
+@dfn{CL} at compile time only, with @code{eval-when-compile}, and use
+the macros it provides.) If you are writing packages that you plan to
+distribute and invite widespread use for, you might want to observe
+the same rule.
+
Some Common Lisp features have been omitted from this package
for various reasons:
@var{form}.
The following Lisp forms will work as generalized variables, and
-so may legally appear in the @var{place} argument of @code{setf}:
+so may appear in the @var{place} argument of @code{setf}:
@itemize @bullet
@item
The following Emacs-specific functions are also @code{setf}-able.
@smallexample
-buffer-file-name marker-position
-buffer-modified-p match-data
-buffer-name mouse-position
-buffer-string overlay-end
-buffer-substring overlay-get
-current-buffer overlay-start
-current-case-table point
-current-column point-marker
-current-global-map point-max
-current-input-mode point-min
-current-local-map process-buffer
-current-window-configuration process-filter
-default-file-modes process-sentinel
-default-value read-mouse-position
-documentation-property screen-height
-extent-data screen-menubar
-extent-end-position screen-width
-extent-start-position selected-window
-face-background selected-screen
-face-background-pixmap selected-frame
-face-font standard-case-table
-face-foreground syntax-table
-face-underline-p window-buffer
-file-modes window-dedicated-p
-frame-height window-display-table
-frame-parameters window-height
-frame-visible-p window-hscroll
-frame-width window-point
-get-register window-start
-getenv window-width
-global-key-binding x-get-cut-buffer
-keymap-parent x-get-cutbuffer
+buffer-file-name marker-position
+buffer-modified-p match-data
+buffer-name mouse-position
+buffer-string overlay-end
+buffer-substring overlay-get
+current-buffer overlay-start
+current-case-table point
+current-column point-marker
+current-global-map point-max
+current-input-mode point-min
+current-local-map process-buffer
+current-window-configuration process-filter
+default-file-modes process-sentinel
+default-value read-mouse-position
+documentation-property screen-height
+extent-data screen-menubar
+extent-end-position screen-width
+extent-start-position selected-window
+face-background selected-screen
+face-background-pixmap selected-frame
+face-font standard-case-table
+face-foreground syntax-table
+face-underline-p window-buffer
+file-modes window-dedicated-p
+frame-height window-display-table
+frame-parameters window-height
+frame-visible-p window-hscroll
+frame-width window-point
+get-register window-start
+getenv window-width
+global-key-binding x-get-cut-buffer
+keymap-parent x-get-cutbuffer
local-key-binding x-get-secondary-selection
-mark x-get-selection
-mark-marker
+mark x-get-selection
+mark-marker
@end smallexample
Most of these have directly corresponding ``set'' functions, like
@item
A call of the form @code{(substring @var{subplace} @var{n} [@var{m}])},
-where @var{subplace} is itself a legal generalized variable whose
+where @var{subplace} is itself a valid generalized variable whose
current value is a string, and where the value stored is also a
string. The new string is spliced into the specified part of the
destination string. For example:
Because they are implemented in terms of Emacs Lisp @code{catch}
and @code{throw}, blocks have the same overhead as actual
@code{catch} constructs (roughly two function calls). However,
-the optimizing byte compiler will optimize away the @code{catch}
+the optimizing byte compiler will optimize away the @code{catch}
if the block does
not in fact contain any @code{return} or @code{return-from} calls
that jump to it. This means that @code{do} loops and @code{defun*}
The @code{by} value is always positive, even for downward-counting
loops. Some sort of @code{from} value is required for downward
-loops; @samp{for x downto 5} is not a legal loop clause all by
+loops; @samp{for x downto 5} is not a valid loop clause all by
itself.
@item for @var{var} in @var{list} by @var{function}
Due to a minor implementation restriction, it will not work to have
more than one @code{for} clause iterating over symbols, hash tables,
keymaps, overlays, or intervals in a given @code{loop}. Fortunately,
-it would rarely if ever be useful to do so. It @emph{is} legal to mix
+it would rarely if ever be useful to do so. It @emph{is} valid to mix
one of these types of clauses with other clauses like @code{for ... to}
or @code{while}.
explicit mechanism, such as @code{finally return}, to return
the accumulated result.
-It is legal for several accumulation clauses of the same type to
+It is valid for several accumulation clauses of the same type to
accumulate into the same place. From Steele:
@example
(defsubst foo (...) ...) ; instead of defun
@end example
-@strong{Note:} This declaration remains in effect after the
+@strong{Please note:} this declaration remains in effect after the
containing source file is done. It is correct to use it to
request that a function you have defined should be inlined,
but it is impolite to use it to request inlining of an external
(get sym prop) @equiv{} (getf (symbol-plist sym) prop)
@end example
-It is legal to use @code{getf} as a @code{setf} place, in which case
-its @var{place} argument must itself be a legal @code{setf} place.
+It is valid to use @code{getf} as a @code{setf} place, in which case
+its @var{place} argument must itself be a valid @code{setf} place.
The @var{default} argument, if any, is ignored in this context.
The effect is to change (via @code{setcar}) the value cell in the
list that corresponds to @var{property}, or to cons a new property-value
* Predicates on Numbers:: `plusp', `oddp', `floatp-safe', etc.
* Numerical Functions:: `abs', `floor*', etc.
* Random Numbers:: `random*', `make-random-state'
-* Implementation Parameters:: `most-positive-fixnum', `most-positive-float'
+* Implementation Parameters:: `most-positive-float'
@end menu
@iftex
integer; each different integer seed will result in a completely
different sequence of random numbers.
-It is legal to print a @code{random-state} object to a buffer or
+It is valid to print a @code{random-state} object to a buffer or
file and later read it back with @code{read}. If a program wishes
to use a sequence of pseudo-random numbers which can be reproduced
later for debugging, it can call @code{(make-random-state t)} to
@noindent
This package defines several useful constants having to with numbers.
-@defvar most-positive-fixnum
-This constant equals the largest value a Lisp integer can hold.
-It is typically @code{2^23-1} or @code{2^25-1}.
-@end defvar
-
-@defvar most-negative-fixnum
-This constant equals the smallest (most negative) value a Lisp
-integer can hold.
-@end defvar
-
The following parameters have to do with floating-point numbers.
This package determines their values by exercising the computer's
floating-point arithmetic in various ways. Because this operation
do not appear in the argument list are initialized based on the
@var{default-value} in their slot descriptor. Also, @code{&optional}
and @code{&key} arguments which don't specify defaults take their
-defaults from the slot descriptor. It is legal to include arguments
+defaults from the slot descriptor. It is valid to include arguments
which don't correspond to slot names; these are useful if they are
referred to in the defaults for optional, keyword, or @code{&aux}
arguments which @emph{do} correspond to slots.
one, some of the features in this package are not fully compliant
with ANSI or Steele; @pxref{Common Lisp Compatibility}. But there
are also quite a few features that this package does not provide
-at all. Here are some major omissions that you will want watch out
+at all. Here are some major omissions that you will want to watch out
for when bringing Common Lisp code into Emacs.
@itemize @bullet
@setchapternewpage odd
@contents
@bye
+
+@ignore
+ arch-tag: b61e7200-3bfa-4a70-a9d3-095e152696f8
+@end ignore
HCoop / bpt / emacs.git / blobdiff