From d3094168d6979f52c770117eb9dc5f034db07fbd Mon Sep 17 00:00:00 2001 From: Glenn Morris Date: Sun, 28 Oct 2012 18:06:13 -0700 Subject: [PATCH] * doc/misc/cl.texi (Organization): More details on cl-lib.el versus cl.el. --- doc/misc/ChangeLog | 4 ++++ doc/misc/cl.texi | 43 +++++++++++++++++++++++++------------------ 2 files changed, 29 insertions(+), 18 deletions(-) diff --git a/doc/misc/ChangeLog b/doc/misc/ChangeLog index fe7781c57cc..8c9573aa00c 100644 --- a/doc/misc/ChangeLog +++ b/doc/misc/ChangeLog @@ -1,3 +1,7 @@ +2012-10-29 Glenn Morris + + * cl.texi (Organization): More details on cl-lib.el versus cl.el. + 2012-10-28 Glenn Morris * cl.texi (Multiple Values, Common Lisp Compatibility): diff --git a/doc/misc/cl.texi b/doc/misc/cl.texi index ed4206c0b97..615a703f925 100644 --- a/doc/misc/cl.texi +++ b/doc/misc/cl.texi @@ -182,17 +182,30 @@ All you have to do is @code{(require 'cl-lib)}, and @file{cl-lib.el} will take care of pulling in the other files when they are needed. -There is another file, @file{cl.el}, which was the main entry point -to the CL package prior to Emacs 24.3. Nowadays, it is replaced -by @file{cl-lib.el}. The two provide the same features, but use -different function names (in fact, @file{cl.el} just defines aliases -to the @file{cl-lib.el} definitions). In particular, the old @file{cl.el} -does not use a clean namespace. For this reason, Emacs has a policy -that packages distributed with Emacs must not load @code{cl} at run time. -(It is ok for them to load @code{cl} at @emph{compile} time, with -@code{eval-when-compile}, and use the macros it provides.) There is -no such restriction on the use of @code{cl-lib}. New code should use -@code{cl-lib} rather than @code{cl}. @xref{Naming Conventions}. +There is another file, @file{cl.el}, which was the main entry point to +the CL package prior to Emacs 24.3. Nowadays, it is replaced by +@file{cl-lib.el}. The two provide the same features (in most cases), +but use different function names (in fact, @file{cl.el} mainly just +defines aliases to the @file{cl-lib.el} definitions). Where +@file{cl-lib.el} defines a function called, for example, +@code{cl-incf}, @file{cl.el} uses the same name but without the +@samp{cl-} prefix, e.g. @code{incf} in this example. There are a few +exceptions to this. First, functions such as @code{cl-defun} where +the unprefixed version was already used for a standard Emacs Lisp +function. In such cases, the @file{cl.el} version adds a @samp{*} +suffix, e.g. @code{defun*}. Second, there are some obsolete features +that are only implemented in @file{cl.el}, not in @file{cl-lib.el}, +because they are replaced by other standard Emacs Lisp features. +Finally, in a very few cases the old @file{cl.el} versions do not +behave in exactly the same way as the @file{cl-lib.el} versions. +@xref{Obsolete Features}. + +Since the old @file{cl.el} does not use a clean namespace, Emacs has a +policy that packages distributed with Emacs must not load @code{cl} at +run time. (It is ok for them to load @code{cl} at @emph{compile} +time, with @code{eval-when-compile}, and use the macros it provides.) +There is no such restriction on the use of @code{cl-lib}. New code +should use @code{cl-lib} rather than @code{cl}. There is one more file, @file{cl-compat.el}, which defines some routines from the older Quiroz CL package that are not otherwise @@ -4666,13 +4679,6 @@ referenced by @code{cl-return} or @code{cl-return-from} inside the block. Following is a list of all known incompatibilities between this package and Common Lisp as documented in Steele (2nd edition). -@ignore -Certain function names, such as @code{member}, @code{assoc}, and -@code{floor}, were already taken by (incompatible) Emacs Lisp -functions; this package appends @samp{*} to the names of its -Common Lisp versions of these functions. -@end ignore - The word @code{cl-defun} is required instead of @code{defun} in order to use extended Common Lisp argument lists in a function. Likewise, @code{cl-defmacro} and @code{cl-function} are versions of those forms @@ -4684,6 +4690,7 @@ The @code{equal} predicate does not distinguish between IEEE floating-point plus and minus zero. The @code{cl-equalp} predicate has several differences with Common Lisp; @pxref{Predicates}. +@c FIXME no longer provided by cl. The @code{setf} mechanism is entirely compatible, except that setf-methods return a list of five values rather than five values directly. Also, the new ``@code{setf} function'' concept -- 2.39.2