cl.el 22.9 KB
Newer Older
1
;;; cl.el --- Common Lisp extensions for Emacs -*-byte-compile-dynamic: t;-*-
Richard M. Stallman's avatar
Richard M. Stallman committed
2 3 4 5 6 7 8 9 10 11 12

;; Copyright (C) 1993 Free Software Foundation, Inc.

;; Author: Dave Gillespie <daveg@synaptics.com>
;; Version: 2.02
;; Keywords: extensions

;; This file is part of GNU Emacs.

;; GNU Emacs is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
Karl Heuer's avatar
Karl Heuer committed
13
;; the Free Software Foundation; either version 2, or (at your option)
Richard M. Stallman's avatar
Richard M. Stallman committed
14 15 16 17 18 19 20 21
;; any later version.

;; GNU Emacs 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
Erik Naggum's avatar
Erik Naggum committed
22 23 24
;; along with GNU Emacs; see the file COPYING.  If not, write to the
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.
Richard M. Stallman's avatar
Richard M. Stallman committed
25

Richard M. Stallman's avatar
Richard M. Stallman committed
26
;;; Commentary:
Richard M. Stallman's avatar
Richard M. Stallman committed
27 28 29 30 31 32 33 34 35 36 37 38 39 40

;; 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.
;;
;; Bug reports, comments, and suggestions are welcome!

;; This file contains the portions of the Common Lisp extensions
;; package which should always be present.


Richard M. Stallman's avatar
Richard M. Stallman committed
41
;;; Future notes:
Richard M. Stallman's avatar
Richard M. Stallman committed
42 43 44 45 46 47

;; 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.


Richard M. Stallman's avatar
Richard M. Stallman committed
48
;;; Change Log:
Richard M. Stallman's avatar
Richard M. Stallman committed
49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93

;; 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.


Richard M. Stallman's avatar
Richard M. Stallman committed
94
;;; Code:
Richard M. Stallman's avatar
Richard M. Stallman committed
95 96 97 98 99

(defvar cl-optimize-speed 1)
(defvar cl-optimize-safety 1)


100
;;;###autoload
Richard M. Stallman's avatar
Richard M. Stallman committed
101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125
(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)
126
  "Increment PLACE by X (1 by default).
Richard M. Stallman's avatar
Richard M. Stallman committed
127 128 129 130 131 132 133
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)
134
  "Decrement PLACE by X (1 by default).
Richard M. Stallman's avatar
Richard M. Stallman committed
135 136 137 138 139 140 141
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)
142
  "Remove and return the head of the list stored in PLACE.
Richard M. Stallman's avatar
Richard M. Stallman committed
143 144 145 146 147 148 149 150
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)
151
  "Insert X at the head of the list stored in PLACE.
Richard M. Stallman's avatar
Richard M. Stallman committed
152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192
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.

(defun cl-map-extents (&rest cl-args)
193
  (apply 'cl-map-overlays cl-args))
Richard M. Stallman's avatar
Richard M. Stallman committed
194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219


;;; 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)
(defvar cl-old-macroexpand (prog1 (symbol-function 'macroexpand)
			     (defalias 'macroexpand 'cl-macroexpand)))

(defun cl-macroexpand (cl-macro &optional cl-env)
220 221 222 223 224 225 226
  "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."
Richard M. Stallman's avatar
Richard M. Stallman committed
227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331
  (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
      (and (boundp 'outbuffer) (bufferp (symbol-value 'outbuffer))
	   (equal (buffer-name (symbol-value '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))

(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)
332
(defalias 'second 'cadr)
Richard M. Stallman's avatar
Richard M. Stallman committed
333 334 335
(defalias 'rest 'cdr)
(defalias 'endp 'null)

336
(defun third (x)
Richard M. Stallman's avatar
Richard M. Stallman committed
337
  "Return the third element of the list LIST."
338
  `(car (cdr (cdr ,x))))
Richard M. Stallman's avatar
Richard M. Stallman committed
339

340
(defun fourth (x)
Richard M. Stallman's avatar
Richard M. Stallman committed
341
  "Return the fourth element of the list LIST."
342
  `(nth 3 ,x))
Richard M. Stallman's avatar
Richard M. Stallman committed
343

344
(defun fifth (x)
Richard M. Stallman's avatar
Richard M. Stallman committed
345
  "Return the fifth element of the list LIST."
346
  `(nth 4 ,x))
Richard M. Stallman's avatar
Richard M. Stallman committed
347

348
(defun sixth (x)
Richard M. Stallman's avatar
Richard M. Stallman committed
349
  "Return the sixth element of the list LIST."
350
  `(nth 5 ,x))
Richard M. Stallman's avatar
Richard M. Stallman committed
351

352
(defun seventh (x)
Richard M. Stallman's avatar
Richard M. Stallman committed
353
  "Return the seventh element of the list LIST."
354
  `(nth 6 ,x))
Richard M. Stallman's avatar
Richard M. Stallman committed
355

356
(defun eighth (x)
Richard M. Stallman's avatar
Richard M. Stallman committed
357
  "Return the eighth element of the list LIST."
358
  `(nth 7 ,x))
Richard M. Stallman's avatar
Richard M. Stallman committed
359

360
(defun ninth (x)
Richard M. Stallman's avatar
Richard M. Stallman committed
361
  "Return the ninth element of the list LIST."
362
  `(nth 8 ,x))
Richard M. Stallman's avatar
Richard M. Stallman committed
363

364
(defun tenth (x)
Richard M. Stallman's avatar
Richard M. Stallman committed
365
  "Return the tenth element of the list LIST."
366
  `(nth 9 ,x))
Richard M. Stallman's avatar
Richard M. Stallman committed
367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463

(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)))))

464 465 466 467 468 469 470 471 472 473
;;(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))
Richard M. Stallman's avatar
Richard M. Stallman committed
474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564

(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)

(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.

(put 'cl-assertion-failed 'error-conditions '(error))
(put 'cl-assertion-failed 'error-message "Assertion failed")

565 566 567
(defvar cl-fake-autoloads nil
  "Non-nil means don't make CL functions autoload.")

Richard M. Stallman's avatar
Richard M. Stallman committed
568 569 570
;;; Autoload the other portions of the package.
(mapcar (function
	 (lambda (set)
571 572 573 574 575
	   (let ((file (if cl-fake-autoloads "<none>" (car set))))
	     (mapcar (function
		      (lambda (func)
			(autoload func (car set) nil nil (nth 1 set))))
		     (cddr set)))))
Richard M. Stallman's avatar
Richard M. Stallman committed
576 577 578 579
	'(("cl-extra" nil
	   coerce equalp cl-map-keymap maplist mapc mapl mapcan mapcon
	   cl-map-keymap cl-map-keymap-recursively cl-map-intervals
	   cl-map-overlays cl-set-frame-visible-p cl-float-limits
580
	   gcd lcm isqrt floor* ceiling* truncate* round*
Richard M. Stallman's avatar
Richard M. Stallman committed
581 582 583
	   mod* rem* signum random* make-random-state random-state-p
	   subseq concatenate cl-mapcar-many map some every notany
	   notevery revappend nreconc list-length tailp copy-tree get* getf
584 585 586
	   cl-set-getf cl-do-remf remprop cl-make-hash-table cl-hash-lookup
	   cl-gethash cl-puthash cl-remhash cl-clrhash cl-maphash cl-hash-table-p
	   cl-hash-table-count cl-progv-before cl-prettyexpand
Richard M. Stallman's avatar
Richard M. Stallman committed
587 588
	   cl-macroexpand-all)
	  ("cl-seq" nil
589
	   reduce fill replace remove* remove-if remove-if-not
590
	   delete* delete-if delete-if-not remove-duplicates
Richard M. Stallman's avatar
Richard M. Stallman committed
591 592 593 594 595
	   delete-duplicates substitute substitute-if substitute-if-not
	   nsubstitute nsubstitute-if nsubstitute-if-not find find-if
	   find-if-not position position-if position-if-not count count-if
	   count-if-not mismatch search sort* stable-sort merge member*
	   member-if member-if-not cl-adjoin assoc* assoc-if assoc-if-not
596
	   rassoc* rassoc-if rassoc-if-not union nunion intersection
Richard M. Stallman's avatar
Richard M. Stallman committed
597 598 599 600 601 602 603 604
	   nintersection set-difference nset-difference set-exclusive-or
	   nset-exclusive-or subsetp subst-if subst-if-not nsubst nsubst-if
	   nsubst-if-not sublis nsublis tree-equal)
	  ("cl-macs" nil
	   gensym gentemp typep cl-do-pop get-setf-method
	   cl-struct-setf-expander compiler-macroexpand cl-compile-time-init)
	  ("cl-macs" t
	   defun* defmacro* function* destructuring-bind eval-when
605
	   load-time-value case ecase typecase etypecase
606
	   block return return-from loop do do* dolist dotimes do-symbols
Richard M. Stallman's avatar
Richard M. Stallman committed
607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644
	   do-all-symbols psetq progv flet labels macrolet symbol-macrolet
	   lexical-let lexical-let* multiple-value-bind multiple-value-setq
	   locally the declare define-setf-method defsetf define-modify-macro
	   setf psetf remf shiftf rotatef letf letf* callf callf2 defstruct
	   check-type assert ignore-errors define-compiler-macro)))

;;; 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*) 2)
	  ((function*) nil
	   (&or symbolp ([&optional 'macro] 'lambda (&rest sexp) &rest form)))
	  ((eval-when) 1 (sexp &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))
	  ((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))
645
	  ((incf decf remf pushnew shiftf rotatef) nil (&rest form))
Richard M. Stallman's avatar
Richard M. Stallman committed
646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671
	  ((letf letf*) 1 ((&rest (&rest form)) &rest form))
	  ((callf destructuring-bind) 2 (sexp form &rest form))
	  ((callf2) 3 (sexp form form &rest form))
	  ((loop) nil (&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.
672
(add-hook 'bytecomp-load-hook 'cl-hack-byte-compiler)
Richard M. Stallman's avatar
Richard M. Stallman committed
673 674 675 676 677 678 679 680 681 682


;;; The following ensures that packages which expect the old-style cl.el
;;; will be happy with this one.

(provide 'cl)

(run-hooks 'cl-load-hook)

;;; cl.el ends here