xemacs-beta: lisp/cl.el comparison

comparison lisp/cl.el @ 209:41ff10fd062f r20-4b3

Import from CVS: tag r20-4b3

author	cvs
date	Mon, 13 Aug 2007 10:04:58 +0200
parents
children	0e522484dd2a

comparison

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-:f427b8ec4379
+:41ff10fd062f
+;;; cl.el --- Common Lisp extensions for GNU Emacs Lisp
+;; Copyright (C) 1993, 1997 Free Software Foundation, Inc.
+;; Author: Dave Gillespie <daveg@synaptics.com>
+;; Maintainer: XEmacs Development Team
+;; Version: 2.02
+;; Keywords: extensions, dumped, lisp
+;; This file is part of XEmacs.
+;; XEmacs is free software; you can redistribute it and/or modify it
+;; under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 2, or (at your option)
+;; any later version.
+;; XEmacs is distributed in the hope that it will be useful, but
+;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+;; General Public License for more details.
+;; You should have received a copy of the GNU General Public License
+;; along with XEmacs; see the file COPYING.  If not, write to the Free
+;; Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+;; 02111-1307, USA.
+;;; Synched up with: FSF 19.34.
+;;; Commentary:
+;; This file is dumped with XEmacs.
+;; These are extensions to Emacs Lisp that provide a degree of
+;; Common Lisp compatibility, beyond what is already built-in
+;; in Emacs Lisp.
+;;
+;; This package was written by Dave Gillespie; it is a complete
+;; rewrite of Cesar Quiroz's original cl.el package of December 1986.
+;;
+;; This package works with Emacs 18, Emacs 19, and XEmacs/Lucid Emacs 19.
+;;
+;; Bug reports, comments, and suggestions are welcome!
+;; This file contains the portions of the Common Lisp extensions
+;; package which should always be present.
+;;; Future notes:
+;; Once Emacs 19 becomes standard, many things in this package which are
+;; messy for reasons of compatibility can be greatly simplified.  For now,
+;; I prefer to maintain one unified version.
+;;; Change Log:
+;; Version 2.02 (30 Jul 93):
+;;  * Added "cl-compat.el" file, extra compatibility with old package.
+;;  * Added `lexical-let' and `lexical-let*'.
+;;  * Added `define-modify-macro', `callf', and `callf2'.
+;;  * Added `ignore-errors'.
+;;  * Changed `(setf (nthcdr N PLACE) X)' to work when N is zero.
+;;  * Merged `*gentemp-counter*' into `*gensym-counter*'.
+;;  * Extended `subseq' to allow negative START and END like `substring'.
+;;  * Added `in-ref', `across-ref', `elements of-ref' loop clauses.
+;;  * Added `concat', `vconcat' loop clauses.
+;;  * Cleaned up a number of compiler warnings.
+;; Version 2.01 (7 Jul 93):
+;;  * Added support for FSF version of Emacs 19.
+;;  * Added `add-hook' for Emacs 18 users.
+;;  * Added `defsubst*' and `symbol-macrolet'.
+;;  * Added `maplist', `mapc', `mapl', `mapcan', `mapcon'.
+;;  * Added `map', `concatenate', `reduce', `merge'.
+;;  * Added `revappend', `nreconc', `tailp', `tree-equal'.
+;;  * Added `assert', `check-type', `typecase', `typep', and `deftype'.
+;;  * Added destructuring and `&environment' support to `defmacro*'.
+;;  * Added destructuring to `loop', and added the following clauses:
+;;      `elements', `frames', `overlays', `intervals', `buffers', `key-seqs'.
+;;  * Renamed `delete' to `delete*' and `remove' to `remove*'.
+;;  * Completed support for all keywords in `remove*', `substitute', etc.
+;;  * Added `most-positive-float' and company.
+;;  * Fixed hash tables to work with latest Lucid Emacs.
+;;  * `proclaim' forms are no longer compile-time-evaluating; use `declaim'.
+;;  * Syntax for `warn' declarations has changed.
+;;  * Improved implementation of `random*'.
+;;  * Moved most sequence functions to a new file, cl-seq.el.
+;;  * Moved `eval-when' into cl-macs.el.
+;;  * Moved `pushnew' and `adjoin' to cl.el for most common cases.
+;;  * Moved `provide' forms down to ends of files.
+;;  * Changed expansion of `pop' to something that compiles to better code.
+;;  * Changed so that no patch is required for Emacs 19 byte compiler.
+;;  * Made more things dependent on `optimize' declarations.
+;;  * Added a partial implementation of struct print functions.
+;;  * Miscellaneous minor changes.
+;; Version 2.00:
+;;  * First public release of this package.
+;;; Code:
+(defvar cl-emacs-type (cond ((or (and (fboundp 'epoch::version)
+				      (symbol-value 'epoch::version))
+				 (string-lessp emacs-version "19")) 18)
+			    ((string-match "XEmacs" emacs-version)
+			     'lucid)
+			    (t 19)))
+(or (fboundp 'defalias) (fset 'defalias 'fset))
+(defvar cl-optimize-speed 1)
+(defvar cl-optimize-safety 1)
+;;; Keywords used in this package.
+;;; XEmacs - keywords are done in Fintern().
+;;;
+;;; (defconst :test ':test)
+;;; (defconst :test-not ':test-not)
+;;; (defconst :key ':key)
+;;; (defconst :start ':start)
+;;; (defconst :start1 ':start1)
+;;; (defconst :start2 ':start2)
+;;; (defconst :end ':end)
+;;; (defconst :end1 ':end1)
+;;; (defconst :end2 ':end2)
+;;; (defconst :count ':count)
+;;; (defconst :initial-value ':initial-value)
+;;; (defconst :size ':size)
+;;; (defconst :from-end ':from-end)
+;;; (defconst :rehash-size ':rehash-size)
+;;; (defconst :rehash-threshold ':rehash-threshold)
+;;; (defconst :allow-other-keys ':allow-other-keys)
+(defvar custom-print-functions nil
+"This is a list of functions that format user objects for printing.
+Each function is called in turn with three arguments: the object, the
+stream, and the print level (currently ignored).  If it is able to
+print the object it returns true; otherwise it returns nil and the
+printer proceeds to the next function on the list.
+This variable is not used at present, but it is defined in hopes that
+a future Emacs interpreter will be able to use it.")
+;;; Predicates.
+(defun eql (a b)    ; See compiler macro in cl-macs.el
+"T if the two args are the same Lisp object.
+Floating-point numbers of equal value are `eql', but they may not be `eq'."
+(if (numberp a)
+(equal a b)
+(eq a b)))
+;;; Generalized variables.  These macros are defined here so that they
+;;; can safely be used in .emacs files.
+(defmacro incf (place &optional x)
+"(incf PLACE [X]): increment PLACE by X (1 by default).
+PLACE may be a symbol, or any generalized variable allowed by `setf'.
+The return value is the incremented value of PLACE."
+(if (symbolp place)
+(list 'setq place (if x (list '+ place x) (list '1+ place)))
+(list 'callf '+ place (or x 1))))
+(defmacro decf (place &optional x)
+"(decf PLACE [X]): decrement PLACE by X (1 by default).
+PLACE may be a symbol, or any generalized variable allowed by `setf'.
+The return value is the decremented value of PLACE."
+(if (symbolp place)
+(list 'setq place (if x (list '- place x) (list '1- place)))
+(list 'callf '- place (or x 1))))
+(defmacro pop (place)
+"(pop PLACE): remove and return the head of the list stored in PLACE.
+Analogous to (prog1 (car PLACE) (setf PLACE (cdr PLACE))), though more
+careful about evaluating each argument only once and in the right order.
+PLACE may be a symbol, or any generalized variable allowed by `setf'."
+(if (symbolp place)
+(list 'car (list 'prog1 place (list 'setq place (list 'cdr place))))
+(cl-do-pop place)))
+(defmacro push (x place)
+"(push X PLACE): insert X at the head of the list stored in PLACE.
+Analogous to (setf PLACE (cons X PLACE)), though more careful about
+evaluating each argument only once and in the right order.  PLACE may
+be a symbol, or any generalized variable allowed by `setf'."
+(if (symbolp place) (list 'setq place (list 'cons x place))
+(list 'callf2 'cons x place)))
+(defmacro pushnew (x place &rest keys)
+"(pushnew X PLACE): insert X at the head of the list if not already there.
+Like (push X PLACE), except that the list is unmodified if X is `eql' to
+an element already on the list.
+Keywords supported:  :test :test-not :key"
+(if (symbolp place) (list 'setq place (list* 'adjoin x place keys))
+(list* 'callf2 'adjoin x place keys)))
+(defun cl-set-elt (seq n val)
+(if (listp seq) (setcar (nthcdr n seq) val) (aset seq n val)))
+(defun cl-set-nthcdr (n list x)
+(if (<= n 0) x (setcdr (nthcdr (1- n) list) x) list))
+(defun cl-set-buffer-substring (start end val)
+(save-excursion (delete-region start end)
+		  (goto-char start)
+		  (insert val)
+		  val))
+(defun cl-set-substring (str start end val)
+(if end (if (< end 0) (incf end (length str)))
+(setq end (length str)))
+(if (< start 0) (incf start str))
+(concat (and (> start 0) (substring str 0 start))
+	  val
+	  (and (< end (length str)) (substring str end))))
+;;; Control structures.
+;;; These macros are so simple and so often-used that it's better to have
+;;; them all the time than to load them from cl-macs.el.
+(defmacro when (cond &rest body)
+"(when COND BODY...): if COND yields non-nil, do BODY, else return nil."
+(list 'if cond (cons 'progn body)))
+(defmacro unless (cond &rest body)
+"(unless COND BODY...): if COND yields nil, do BODY, else return nil."
+(cons 'if (cons cond (cons nil body))))
+(defun cl-map-extents (&rest cl-args)
+(if (fboundp 'next-overlay-at) (apply 'cl-map-overlays cl-args)
+(if (fboundp 'map-extents) (apply 'map-extents cl-args))))
+;;; Blocks and exits.
+(defalias 'cl-block-wrapper 'identity)
+(defalias 'cl-block-throw 'throw)
+;;; Multiple values.  True multiple values are not supported, or even
+;;; simulated.  Instead, multiple-value-bind and friends simply expect
+;;; the target form to return the values as a list.
+(defalias 'values 'list)
+(defalias 'values-list 'identity)
+(defalias 'multiple-value-list 'identity)
+(defalias 'multiple-value-call 'apply)  ; only works for one arg
+(defalias 'nth-value 'nth)
+;;; Macros.
+(defvar cl-macro-environment nil)
+;; XEmacs: we renamed the internal function to macroexpand-internal
+;; to avoid doc-file problems.
+(defvar cl-old-macroexpand (prog1 (symbol-function 'macroexpand-internal)
+			     (defalias 'macroexpand 'cl-macroexpand)))
+(defun cl-macroexpand (cl-macro &optional cl-env)
+"Return result of expanding macros at top level of FORM.
+If FORM is not a macro call, it is returned unchanged.
+Otherwise, the macro is expanded and the expansion is considered
+in place of FORM.  When a non-macro-call results, it is returned.
+The second optional arg ENVIRONMENT species an environment of macro
+definitions to shadow the loaded ones for use in file byte-compilation."
+(let ((cl-macro-environment cl-env))
+(while (progn (setq cl-macro (funcall cl-old-macroexpand cl-macro cl-env))
+		  (and (symbolp cl-macro)
+		       (cdr (assq (symbol-name cl-macro) cl-env))))
+(setq cl-macro (cadr (assq (symbol-name cl-macro) cl-env))))
+cl-macro))
+;;; Declarations.
+(defvar cl-compiling-file nil)
+(defun cl-compiling-file ()
+(or cl-compiling-file
+;; XEmacs change
+;      (and (boundp 'outbuffer) (bufferp (symbol-value 'outbuffer))
+;	   (equal (buffer-name (symbol-value 'outbuffer))
+;		  " *Compiler Output*"))
+(and (boundp 'byte-compile-outbuffer)
+	   (bufferp (symbol-value 'byte-compile-outbuffer))
+	   (equal (buffer-name (symbol-value 'byte-compile-outbuffer))
+		  " *Compiler Output*"))
+))
+(defvar cl-proclaims-deferred nil)
+(defun proclaim (spec)
+(if (fboundp 'cl-do-proclaim) (cl-do-proclaim spec t)
+(push spec cl-proclaims-deferred))
+nil)
+(defmacro declaim (&rest specs)
+(let ((body (mapcar (function (lambda (x) (list 'proclaim (list 'quote x))))
+		      specs)))
+(if (cl-compiling-file) (list* 'eval-when '(compile load eval) body)
+(cons 'progn body))))   ; avoid loading cl-macs.el for eval-when
+;;; Symbols.
+(defun cl-random-time ()
+(let* ((time (copy-sequence (current-time-string))) (i (length time)) (v 0))
+(while (>= (decf i) 0) (setq v (+ (* v 3) (aref time i))))
+v))
+(defvar *gensym-counter* (* (logand (cl-random-time) 1023) 100))
+;;; Numbers.
+(defun floatp-safe (x)
+"T if OBJECT is a floating point number.
+On Emacs versions that lack floating-point support, this function
+always returns nil."
+(and (numberp x) (not (integerp x))))
+(defun plusp (x)
+"T if NUMBER is positive."
+(> x 0))
+(defun minusp (x)
+"T if NUMBER is negative."
+(< x 0))
+(defun oddp (x)
+"T if INTEGER is odd."
+(eq (logand x 1) 1))
+(defun evenp (x)
+"T if INTEGER is even."
+(eq (logand x 1) 0))
+(defun cl-abs (x)
+"Return the absolute value of ARG."
+(if (>= x 0) x (- x)))
+(or (fboundp 'abs) (defalias 'abs 'cl-abs))   ; This is built-in to Emacs 19
+(defvar *random-state* (vector 'cl-random-state-tag -1 30 (cl-random-time)))
+;;; We use `eval' in case VALBITS differs from compile-time to load-time.
+(defconst most-positive-fixnum (eval '(lsh -1 -1)))
+(defconst most-negative-fixnum (eval '(- -1 (lsh -1 -1))))
+;;; The following are actually set by cl-float-limits.
+(defconst most-positive-float nil)
+(defconst most-negative-float nil)
+(defconst least-positive-float nil)
+(defconst least-negative-float nil)
+(defconst least-positive-normalized-float nil)
+(defconst least-negative-normalized-float nil)
+(defconst float-epsilon nil)
+(defconst float-negative-epsilon nil)
+;;; Sequence functions.
+(defalias 'copy-seq 'copy-sequence)
+(defun mapcar* (cl-func cl-x &rest cl-rest)
+"Apply FUNCTION to each element of SEQ, and make a list of the results.
+If there are several SEQs, FUNCTION is called with that many arguments,
+and mapping stops as soon as the shortest list runs out.  With just one
+SEQ, this is like `mapcar'.  With several, it is like the Common Lisp
+`mapcar' function extended to arbitrary sequence types."
+(if cl-rest
+(if (or (cdr cl-rest) (nlistp cl-x) (nlistp (car cl-rest)))
+	  (cl-mapcar-many cl-func (cons cl-x cl-rest))
+	(let ((cl-res nil) (cl-y (car cl-rest)))
+	  (while (and cl-x cl-y)
+	    (push (funcall cl-func (pop cl-x) (pop cl-y)) cl-res))
+	  (nreverse cl-res)))
+(mapcar cl-func cl-x)))
+;;; List functions.
+(defalias 'first 'car)
+(defalias 'rest 'cdr)
+(defalias 'endp 'null)
+(defun second (x)
+"Return the second element of the list LIST."
+(car (cdr x)))
+(defun third (x)
+"Return the third element of the list LIST."
+(car (cdr (cdr x))))
+(defun fourth (x)
+"Return the fourth element of the list LIST."
+(nth 3 x))
+(defun fifth (x)
+"Return the fifth element of the list LIST."
+(nth 4 x))
+(defun sixth (x)
+"Return the sixth element of the list LIST."
+(nth 5 x))
+(defun seventh (x)
+"Return the seventh element of the list LIST."
+(nth 6 x))
+(defun eighth (x)
+"Return the eighth element of the list LIST."
+(nth 7 x))
+(defun ninth (x)
+"Return the ninth element of the list LIST."
+(nth 8 x))
+(defun tenth (x)
+"Return the tenth element of the list LIST."
+(nth 9 x))
+(defun caar (x)
+"Return the `car' of the `car' of X."
+(car (car x)))
+(defun cadr (x)
+"Return the `car' of the `cdr' of X."
+(car (cdr x)))
+(defun cdar (x)
+"Return the `cdr' of the `car' of X."
+(cdr (car x)))
+(defun cddr (x)
+"Return the `cdr' of the `cdr' of X."
+(cdr (cdr x)))
+(defun caaar (x)
+"Return the `car' of the `car' of the `car' of X."
+(car (car (car x))))
+(defun caadr (x)
+"Return the `car' of the `car' of the `cdr' of X."
+(car (car (cdr x))))
+(defun cadar (x)
+"Return the `car' of the `cdr' of the `car' of X."
+(car (cdr (car x))))
+(defun caddr (x)
+"Return the `car' of the `cdr' of the `cdr' of X."
+(car (cdr (cdr x))))
+(defun cdaar (x)
+"Return the `cdr' of the `car' of the `car' of X."
+(cdr (car (car x))))
+(defun cdadr (x)
+"Return the `cdr' of the `car' of the `cdr' of X."
+(cdr (car (cdr x))))
+(defun cddar (x)
+"Return the `cdr' of the `cdr' of the `car' of X."
+(cdr (cdr (car x))))
+(defun cdddr (x)
+"Return the `cdr' of the `cdr' of the `cdr' of X."
+(cdr (cdr (cdr x))))
+(defun caaaar (x)
+"Return the `car' of the `car' of the `car' of the `car' of X."
+(car (car (car (car x)))))
+(defun caaadr (x)
+"Return the `car' of the `car' of the `car' of the `cdr' of X."
+(car (car (car (cdr x)))))
+(defun caadar (x)
+"Return the `car' of the `car' of the `cdr' of the `car' of X."
+(car (car (cdr (car x)))))
+(defun caaddr (x)
+"Return the `car' of the `car' of the `cdr' of the `cdr' of X."
+(car (car (cdr (cdr x)))))
+(defun cadaar (x)
+"Return the `car' of the `cdr' of the `car' of the `car' of X."
+(car (cdr (car (car x)))))
+(defun cadadr (x)
+"Return the `car' of the `cdr' of the `car' of the `cdr' of X."
+(car (cdr (car (cdr x)))))
+(defun caddar (x)
+"Return the `car' of the `cdr' of the `cdr' of the `car' of X."
+(car (cdr (cdr (car x)))))
+(defun cadddr (x)
+"Return the `car' of the `cdr' of the `cdr' of the `cdr' of X."
+(car (cdr (cdr (cdr x)))))
+(defun cdaaar (x)
+"Return the `cdr' of the `car' of the `car' of the `car' of X."
+(cdr (car (car (car x)))))
+(defun cdaadr (x)
+"Return the `cdr' of the `car' of the `car' of the `cdr' of X."
+(cdr (car (car (cdr x)))))
+(defun cdadar (x)
+"Return the `cdr' of the `car' of the `cdr' of the `car' of X."
+(cdr (car (cdr (car x)))))
+(defun cdaddr (x)
+"Return the `cdr' of the `car' of the `cdr' of the `cdr' of X."
+(cdr (car (cdr (cdr x)))))
+(defun cddaar (x)
+"Return the `cdr' of the `cdr' of the `car' of the `car' of X."
+(cdr (cdr (car (car x)))))
+(defun cddadr (x)
+"Return the `cdr' of the `cdr' of the `car' of the `cdr' of X."
+(cdr (cdr (car (cdr x)))))
+(defun cdddar (x)
+"Return the `cdr' of the `cdr' of the `cdr' of the `car' of X."
+(cdr (cdr (cdr (car x)))))
+(defun cddddr (x)
+"Return the `cdr' of the `cdr' of the `cdr' of the `cdr' of X."
+(cdr (cdr (cdr (cdr x)))))
+(defun last (x &optional n)
+"Returns the last link in the list LIST.
+With optional argument N, returns Nth-to-last link (default 1)."
+(if n
+(let ((m 0) (p x))
+	(while (consp p) (incf m) (pop p))
+	(if (<= n 0) p
+	  (if (< n m) (nthcdr (- m n) x) x)))
+(while (consp (cdr x)) (pop x))
+x))
+(defun butlast (x &optional n)
+"Returns a copy of LIST with the last N elements removed."
+(if (and n (<= n 0)) x
+(nbutlast (copy-sequence x) n)))
+(defun nbutlast (x &optional n)
+"Modifies LIST to remove the last N elements."
+(let ((m (length x)))
+(or n (setq n 1))
+(and (< n m)
+	 (progn
+	   (if (> n 0) (setcdr (nthcdr (- (1- m) n) x) nil))
+	   x))))
+(defun list* (arg &rest rest)   ; See compiler macro in cl-macs.el
+"Return a new list with specified args as elements, cons'd to last arg.
+Thus, `(list* A B C D)' is equivalent to `(nconc (list A B C) D)', or to
+`(cons A (cons B (cons C D)))'."
+(cond ((not rest) arg)
+	((not (cdr rest)) (cons arg (car rest)))
+	(t (let* ((n (length rest))
+		  (copy (copy-sequence rest))
+		  (last (nthcdr (- n 2) copy)))
+	     (setcdr last (car (cdr last)))
+	     (cons arg copy)))))
+(defun ldiff (list sublist)
+"Return a copy of LIST with the tail SUBLIST removed."
+(let ((res nil))
+(while (and (consp list) (not (eq list sublist)))
+(push (pop list) res))
+(nreverse res)))
+(defun copy-list (list)
+"Return a copy of a list, which may be a dotted list.
+The elements of the list are not copied, just the list structure itself."
+(if (consp list)
+(let ((res nil))
+	(while (consp list) (push (pop list) res))
+	(prog1 (nreverse res) (setcdr res list)))
+(car list)))
+(defun cl-maclisp-member (item list)
+(while (and list (not (equal item (car list)))) (setq list (cdr list)))
+list)
+;;; Define an Emacs 19-compatible `member' for the benefit of Emacs 18 users.
+(or (and (fboundp 'member) (subrp (symbol-function 'member)))
+(defalias 'member 'cl-maclisp-member))
+(defalias 'cl-member 'memq)   ; for compatibility with old CL package
+(defalias 'cl-floor 'floor*)
+(defalias 'cl-ceiling 'ceiling*)
+(defalias 'cl-truncate 'truncate*)
+(defalias 'cl-round 'round*)
+(defalias 'cl-mod 'mod*)
+(defun adjoin (cl-item cl-list &rest cl-keys)  ; See compiler macro in cl-macs
+"Return ITEM consed onto the front of LIST only if it's not already there.
+Otherwise, return LIST unmodified.
+Keywords supported:  :test :test-not :key"
+(cond ((or (equal cl-keys '(:test eq))
+	     (and (null cl-keys) (not (numberp cl-item))))
+	 (if (memq cl-item cl-list) cl-list (cons cl-item cl-list)))
+	((or (equal cl-keys '(:test equal)) (null cl-keys))
+	 (if (member cl-item cl-list) cl-list (cons cl-item cl-list)))
+	(t (apply 'cl-adjoin cl-item cl-list cl-keys))))
+(defun subst (cl-new cl-old cl-tree &rest cl-keys)
+"Substitute NEW for OLD everywhere in TREE (non-destructively).
+Return a copy of TREE with all elements `eql' to OLD replaced by NEW.
+Keywords supported:  :test :test-not :key"
+(if (or cl-keys (and (numberp cl-old) (not (integerp cl-old))))
+(apply 'sublis (list (cons cl-old cl-new)) cl-tree cl-keys)
+(cl-do-subst cl-new cl-old cl-tree)))
+(defun cl-do-subst (cl-new cl-old cl-tree)
+(cond ((eq cl-tree cl-old) cl-new)
+	((consp cl-tree)
+	 (let ((a (cl-do-subst cl-new cl-old (car cl-tree)))
+	       (d (cl-do-subst cl-new cl-old (cdr cl-tree))))
+	   (if (and (eq a (car cl-tree)) (eq d (cdr cl-tree)))
+	       cl-tree (cons a d))))
+	(t cl-tree)))
+(defun acons (a b c) (cons (cons a b) c))
+(defun pairlis (a b &optional c) (nconc (mapcar* 'cons a b) c))
+;;; Miscellaneous.
+;; XEmacs change
+(define-error 'cl-assertion-failed "Assertion failed")
+;;; This is defined in Emacs 19; define it here for Emacs 18 users.
+(defun cl-add-hook (hook func &optional append)
+"Add to hook variable HOOK the function FUNC.
+FUNC is not added if it already appears on the list stored in HOOK."
+(let ((old (and (boundp hook) (symbol-value hook))))
+(and (listp old) (not (eq (car old) 'lambda))
+	 (setq old (list old)))
+(and (not (member func old))
+	 (set hook (if append (nconc old (list func)) (cons func old))))))
+(or (fboundp 'add-hook) (defalias 'add-hook 'cl-add-hook))
+;; XEmacs change
+;(load "cl-defs")
+;;; Define data for indentation and edebug.
+(mapcar (function
+	 (lambda (entry)
+	   (mapcar (function
+		    (lambda (func)
+		      (put func 'lisp-indent-function (nth 1 entry))
+		      (put func 'lisp-indent-hook (nth 1 entry))
+		      (or (get func 'edebug-form-spec)
+			  (put func 'edebug-form-spec (nth 2 entry)))))
+		   (car entry))))
+	'(((defun* defmacro*) defun)
+	  ((function*) nil
+	   (&or symbolp ([&optional 'macro] 'lambda (&rest sexp) &rest form)))
+	  ((eval-when) 1 (sexp &rest form))
+	  ((when unless) 1 (&rest form))
+	  ((declare) nil (&rest sexp))
+	  ((the) 1 (sexp &rest form))
+	  ((case ecase typecase etypecase) 1 (form &rest (sexp &rest form)))
+	  ((block return-from) 1 (sexp &rest form))
+	  ((return) nil (&optional form))
+	  ((do do*) 2 ((&rest &or symbolp (symbolp &optional form form))
+		       (form &rest form)
+		       &rest form))
+	  ((dolist dotimes) 1 ((symbolp form &rest form) &rest form))
+	  ((do-symbols) 1 ((symbolp form &optional form form) &rest form))
+	  ((do-all-symbols) 1 ((symbolp form &optional form) &rest form))
+	  ((psetq setf psetf) nil edebug-setq-form)
+	  ((progv) 2 (&rest form))
+	  ((flet labels macrolet) 1
+	   ((&rest (sexp sexp &rest form)) &rest form))
+	  ((symbol-macrolet lexical-let lexical-let*) 1
+	   ((&rest &or symbolp (symbolp form)) &rest form))
+	  ((multiple-value-bind) 2 ((&rest symbolp) &rest form))
+	  ((multiple-value-setq) 1 ((&rest symbolp) &rest form))
+	  ((incf decf remf pop push pushnew shiftf rotatef) nil (&rest form))
+	  ((letf letf*) 1 ((&rest (&rest form)) &rest form))
+	  ((callf destructuring-bind) 2 (sexp form &rest form))
+	  ((callf2) 3 (sexp form form &rest form))
+	  ((loop) defun (&rest &or symbolp form))
+	  ((ignore-errors) 0 (&rest form))))
+;;; This goes here so that cl-macs can find it if it loads right now.
+(provide 'cl-19)     ; usage: (require 'cl-19 "cl")
+;;; Things to do after byte-compiler is loaded.
+;;; As a side effect, we cause cl-macs to be loaded when compiling, so
+;;; that the compiler-macros defined there will be present.
+(defvar cl-hacked-flag nil)
+(defun cl-hack-byte-compiler ()
+(if (and (not cl-hacked-flag) (fboundp 'byte-compile-file-form))
+(progn
+	(cl-compile-time-init)   ; in cl-macs.el
+	(setq cl-hacked-flag t))))
+;;; Try it now in case the compiler has already been loaded.
+(cl-hack-byte-compiler)
+;;; Also make a hook in case compiler is loaded after this file.
+;;; The compiler doesn't call any hooks when it loads or runs, but
+;;; we can take advantage of the fact that emacs-lisp-mode will be
+;;; called when the compiler reads in the file to be compiled.
+;;; BUG: If the first compilation is `byte-compile' rather than
+;;; `byte-compile-file', we lose.  Oh, well.
+(add-hook 'emacs-lisp-mode-hook 'cl-hack-byte-compiler)
+;;; The following ensures that packages which expect the old-style cl.el
+;;; will be happy with this one.
+(provide 'cl)
+(provide 'mini-cl)   ; for Epoch
+(run-hooks 'cl-load-hook)
+;;; cl.el ends here

Mercurial > hg > xemacs-beta

comparison lisp/cl.el @ 209:41ff10fd062f r20-4b3