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Revision 1.6 - (show annotations)
Tue Jan 12 18:25:48 1993 UTC (21 years, 3 months ago) by phg
Branch: MAIN
Branch point for: cmu
Changes since 1.5: +26 -45 lines
September-16-92-PCL-e has been incorporated into the CMUCL sources thanks
to Rick Harris.
1 ;;;-*-Mode:LISP; Package:(PCL (LISP WALKER)); Base:10; Syntax:Common-lisp -*-
2 ;;;
3 ;;; *************************************************************************
4 ;;; Copyright (c) 1985, 1986, 1987, 1988, 1989, 1990 Xerox Corporation.
5 ;;; All rights reserved.
6 ;;;
7 ;;; Use and copying of this software and preparation of derivative works
8 ;;; based upon this software are permitted. Any distribution of this
9 ;;; software or derivative works must comply with all applicable United
10 ;;; States export control laws.
11 ;;;
12 ;;; This software is made available AS IS, and Xerox Corporation makes no
13 ;;; warranty about the software, its performance or its conformity to any
14 ;;; specification.
15 ;;;
16 ;;; Any person obtaining a copy of this software is requested to send their
17 ;;; name and post office or electronic mail address to:
18 ;;; CommonLoops Coordinator
19 ;;; Xerox PARC
20 ;;; 3333 Coyote Hill Rd.
21 ;;; Palo Alto, CA 94304
22 ;;; (or send Arpanet mail to CommonLoops-Coordinator.pa@Xerox.arpa)
23 ;;;
24 ;;; Suggestions, comments and requests for improvements are also welcome.
25 ;;; *************************************************************************
26 ;;;
27 ;;; Macros global variable definitions, and other random support stuff used
28 ;;; by the rest of the system.
29 ;;;
30 ;;; For simplicity (not having to use eval-when a lot), this file must be
31 ;;; loaded before it can be compiled.
32 ;;;
33
34 (in-package :pcl)
35
36 (proclaim '(declaration
37 #-Genera values ;I use this so that Zwei can remind
38 ;me what values a function returns.
39
40 #-Genera arglist ;Tells me what the pretty arglist
41 ;of something (which probably takes
42 ;&rest args) is.
43
44 #-Genera indentation ;Tells ZWEI how to indent things
45 ;like defclass.
46 class
47 variable-rebinding
48 pcl-fast-call
49 method-name
50 method-lambda-list
51 ))
52
53 ;;; Age old functions which CommonLisp cleaned-up away. They probably exist
54 ;;; in other packages in all CommonLisp implementations, but I will leave it
55 ;;; to the compiler to optimize into calls to them.
56 ;;;
57 ;;; Common Lisp BUG:
58 ;;; Some Common Lisps define these in the Lisp package which causes
59 ;;; all sorts of lossage. Common Lisp should explictly specify which
60 ;;; symbols appear in the Lisp package.
61 ;;;
62 (eval-when (compile load eval)
63
64 (defmacro memq (item list) `(member ,item ,list :test #'eq))
65 (defmacro assq (item list) `(assoc ,item ,list :test #'eq))
66 (defmacro rassq (item list) `(rassoc ,item ,list :test #'eq))
67 (defmacro delq (item list) `(delete ,item ,list :test #'eq))
68 (defmacro posq (item list) `(position ,item ,list :test #'eq))
69 (defmacro neq (x y) `(not (eq ,x ,y)))
70
71
72 (defun make-caxr (n form)
73 (if (< n 4)
74 `(,(nth n '(car cadr caddr cadddr)) ,form)
75 (make-caxr (- n 4) `(cddddr ,form))))
76
77 (defun make-cdxr (n form)
78 (cond ((zerop n) form)
79 ((< n 5) `(,(nth n '(identity cdr cddr cdddr cddddr)) ,form))
80 (t (make-cdxr (- n 4) `(cddddr ,form)))))
81 )
82
83 (defun true (&rest ignore) (declare (ignore ignore)) t)
84 (defun false (&rest ignore) (declare (ignore ignore)) nil)
85 (defun zero (&rest ignore) (declare (ignore ignore)) 0)
86
87 (defun make-plist (keys vals)
88 (if (null vals)
89 ()
90 (list* (car keys)
91 (car vals)
92 (make-plist (cdr keys) (cdr vals)))))
93
94 (defun remtail (list tail)
95 (if (eq list tail) () (cons (car list) (remtail (cdr list) tail))))
96
97 ;;; ONCE-ONLY does the same thing as it does in zetalisp. I should have just
98 ;;; lifted it from there but I am honest. Not only that but this one is
99 ;;; written in Common Lisp. I feel a lot like bootstrapping, or maybe more
100 ;;; like rebuilding Rome.
101 (defmacro once-only (vars &body body)
102 (let ((gensym-var (gensym))
103 (run-time-vars (gensym))
104 (run-time-vals (gensym))
105 (expand-time-val-forms ()))
106 (dolist (var vars)
107 (push `(if (or (symbolp ,var)
108 (numberp ,var)
109 (and (listp ,var)
110 (member (car ,var) '(quote function))))
111 ,var
112 (let ((,gensym-var (gensym)))
113 (push ,gensym-var ,run-time-vars)
114 (push ,var ,run-time-vals)
115 ,gensym-var))
116 expand-time-val-forms))
117 `(let* (,run-time-vars
118 ,run-time-vals
119 (wrapped-body
120 (let ,(mapcar #'list vars (reverse expand-time-val-forms))
121 ,@body)))
122 `(let ,(mapcar #'list (reverse ,run-time-vars)
123 (reverse ,run-time-vals))
124 ,wrapped-body))))
125
126 (eval-when (compile load eval)
127 (defun extract-declarations (body &optional environment)
128 ;;(declare (values documentation declarations body))
129 (let (documentation declarations form)
130 (when (and (stringp (car body))
131 (cdr body))
132 (setq documentation (pop body)))
133 (block outer
134 (loop
135 (when (null body) (return-from outer nil))
136 (setq form (car body))
137 (when (block inner
138 (loop (cond ((not (listp form))
139 (return-from outer nil))
140 ((eq (car form) 'declare)
141 (return-from inner 't))
142 (t
143 (multiple-value-bind (newform macrop)
144 (macroexpand-1 form environment)
145 (if (or (not (eq newform form)) macrop)
146 (setq form newform)
147 (return-from outer nil)))))))
148 (pop body)
149 (dolist (declaration (cdr form))
150 (push declaration declarations)))))
151 (values documentation
152 (and declarations `((declare ,.(nreverse declarations))))
153 body)))
154 )
155
156 (defun get-declaration (name declarations &optional default)
157 (dolist (d declarations default)
158 (dolist (form (cdr d))
159 (when (and (consp form) (eq (car form) name))
160 (return-from get-declaration (cdr form))))))
161
162
163 #+Lucid
164 (eval-when (compile load eval)
165 (eval `(defstruct ,(intern "FASLESCAPE" (find-package 'lucid)))))
166
167 (defvar *keyword-package* (find-package 'keyword))
168
169 (defun make-keyword (symbol)
170 (intern (symbol-name symbol) *keyword-package*))
171
172 (eval-when (compile load eval)
173
174 (defun string-append (&rest strings)
175 (setq strings (copy-list strings)) ;The explorer can't even
176 ;rplaca an &rest arg?
177 (do ((string-loc strings (cdr string-loc)))
178 ((null string-loc)
179 (apply #'concatenate 'string strings))
180 (rplaca string-loc (string (car string-loc)))))
181 )
182
183 (defun symbol-append (sym1 sym2 &optional (package *package*))
184 (intern (string-append sym1 sym2) package))
185
186 (defmacro check-member (place list &key (test #'eql) (pretty-name place))
187 (once-only (place list)
188 `(or (member ,place ,list :test ,test)
189 (error "The value of ~A, ~S is not one of ~S."
190 ',pretty-name ,place ,list))))
191
192 (defmacro alist-entry (alist key make-entry-fn)
193 (once-only (alist key)
194 `(or (assq ,key ,alist)
195 (progn (setf ,alist (cons (,make-entry-fn ,key) ,alist))
196 (car ,alist)))))
197
198 ;;; A simple version of destructuring-bind.
199
200 ;;; This does no more error checking than CAR and CDR themselves do. Some
201 ;;; attempt is made to be smart about preserving intermediate values. It
202 ;;; could be better, although the only remaining case should be easy for
203 ;;; the compiler to spot since it compiles to PUSH POP.
204 ;;;
205 ;;; Common Lisp BUG:
206 ;;; Common Lisp should have destructuring-bind.
207 ;;;
208 (defmacro destructuring-bind (pattern form &body body)
209 (multiple-value-bind (ignore declares body)
210 (extract-declarations body)
211 (declare (ignore ignore))
212 (multiple-value-bind (setqs binds)
213 (destructure pattern form)
214 `(let ,binds
215 ,@declares
216 ,@setqs
217 (progn .destructure-form.)
218 . ,body))))
219
220 (eval-when (compile load eval)
221 (defun destructure (pattern form)
222 ;;(declare (values setqs binds))
223 (let ((*destructure-vars* ())
224 (setqs ()))
225 (declare (special *destructure-vars*))
226 (setq *destructure-vars* '(.destructure-form.)
227 setqs (list `(setq .destructure-form. ,form))
228 form '.destructure-form.)
229 (values (nconc setqs (nreverse (destructure-internal pattern form)))
230 (delete nil *destructure-vars*))))
231
232 (defun destructure-internal (pattern form)
233 ;; When we are called, pattern must be a list. Form should be a symbol
234 ;; which we are free to setq containing the value to be destructured.
235 ;; Optimizations are performed for the last element of pattern cases.
236 ;; we assume that the compiler is smart about gensyms which are bound
237 ;; but only for a short period of time.
238 (declare (special *destructure-vars*))
239 (let ((gensym (gensym))
240 (pending-pops 0)
241 (var nil)
242 (setqs ()))
243 (labels
244 ((make-pop (var form pop-into)
245 (prog1
246 (cond ((zerop pending-pops)
247 `(progn ,(and var `(setq ,var (car ,form)))
248 ,(and pop-into `(setq ,pop-into (cdr ,form)))))
249 ((null pop-into)
250 (and var `(setq ,var ,(make-caxr pending-pops form))))
251 (t
252 `(progn (setq ,pop-into ,(make-cdxr pending-pops form))
253 ,(and var `(setq ,var (pop ,pop-into))))))
254 (setq pending-pops 0))))
255 (do ((pat pattern (cdr pat)))
256 ((null pat) ())
257 (if (symbolp (setq var (car pat)))
258 (progn
259 #-:coral (unless (memq var '(nil ignore))
260 (push var *destructure-vars*))
261 #+:coral (push var *destructure-vars*)
262 (cond ((null (cdr pat))
263 (push (make-pop var form ()) setqs))
264 ((symbolp (cdr pat))
265 (push (make-pop var form (cdr pat)) setqs)
266 (push (cdr pat) *destructure-vars*)
267 (return ()))
268 #-:coral
269 ((memq var '(nil ignore)) (incf pending-pops))
270 #-:coral
271 ((memq (cadr pat) '(nil ignore))
272 (push (make-pop var form ()) setqs)
273 (incf pending-pops 1))
274 (t
275 (push (make-pop var form form) setqs))))
276 (progn
277 (push `(let ((,gensym ()))
278 ,(make-pop gensym
279 form
280 (if (symbolp (cdr pat)) (cdr pat) form))
281 ,@(nreverse
282 (destructure-internal
283 (if (consp pat) (car pat) pat)
284 gensym)))
285 setqs)
286 (when (symbolp (cdr pat))
287 (push (cdr pat) *destructure-vars*)
288 (return)))))
289 setqs)))
290 )
291
292
293 (defmacro collecting-once (&key initial-value)
294 `(let* ((head ,initial-value)
295 (tail ,(and initial-value `(last head))))
296 (values #'(lambda (value)
297 (if (null head)
298 (setq head (setq tail (list value)))
299 (unless (memq value head)
300 (setq tail
301 (cdr (rplacd tail (list value)))))))
302 #'(lambda nil head))))
303
304 (defmacro doplist ((key val) plist &body body &environment env)
305 (multiple-value-bind (doc decls bod)
306 (extract-declarations body env)
307 (declare (ignore doc))
308 `(let ((.plist-tail. ,plist) ,key ,val)
309 ,@decls
310 (loop (when (null .plist-tail.) (return nil))
311 (setq ,key (pop .plist-tail.))
312 (when (null .plist-tail.)
313 (error "Malformed plist in doplist, odd number of elements."))
314 (setq ,val (pop .plist-tail.))
315 (progn ,@bod)))))
316
317 (defmacro if* (condition true &rest false)
318 `(if ,condition ,true (progn ,@false)))
319
320 (defmacro dolist-carefully ((var list improper-list-handler) &body body)
321 `(let ((,var nil)
322 (.dolist-carefully. ,list))
323 (loop (when (null .dolist-carefully.) (return nil))
324 (if (consp .dolist-carefully.)
325 (progn
326 (setq ,var (pop .dolist-carefully.))
327 ,@body)
328 (,improper-list-handler)))))
329
330 ;;
331 ;;;;;; printing-random-thing
332 ;;
333 ;;; Similar to printing-random-object in the lisp machine but much simpler
334 ;;; and machine independent.
335 (defmacro printing-random-thing ((thing stream) &body body)
336 (once-only (stream)
337 `(progn (format ,stream "#<")
338 ,@body
339 (format ,stream " ")
340 (printing-random-thing-internal ,thing ,stream)
341 (format ,stream ">"))))
342
343 (defun printing-random-thing-internal (thing stream)
344 (declare (ignore thing stream))
345 nil)
346
347 ;;
348 ;;;;;;
349 ;;
350
351 (defun capitalize-words (string &optional (dashes-p t))
352 (let ((string (copy-seq (string string))))
353 (declare (string string))
354 (do* ((flag t flag)
355 (length (length string) length)
356 (char nil char)
357 (i 0 (+ i 1)))
358 ((= i length) string)
359 (setq char (elt string i))
360 (cond ((both-case-p char)
361 (if flag
362 (and (setq flag (lower-case-p char))
363 (setf (elt string i) (char-upcase char)))
364 (and (not flag) (setf (elt string i) (char-downcase char))))
365 (setq flag nil))
366 ((char-equal char #\-)
367 (setq flag t)
368 (unless dashes-p (setf (elt string i) #\space)))
369 (t (setq flag nil))))))
370
371 #-(or lucid kcl)
372 (eval-when (compile load eval)
373 ;(warn "****** Things will go faster if you fix define-compiler-macro")
374 )
375
376 (defmacro define-compiler-macro (name arglist &body body)
377 #+(or lucid kcl)
378 `(#+lucid lcl:def-compiler-macro #+kcl si::define-compiler-macro
379 ,name ,arglist
380 ,@body)
381 #-(or kcl lucid)
382 (declare (ignore name arglist body))
383 #-(or kcl lucid)
384 nil)
385
386
387 ;;;
388 ;;; FIND-CLASS
389 ;;;
390 ;;; This is documented in the CLOS specification.
391 ;;;
392 (defvar *find-class* (make-hash-table :test #'eq))
393
394 (defun make-constant-function (value)
395 #'(lambda (object)
396 (declare (ignore object))
397 value))
398
399 (defun function-returning-nil (x)
400 (declare (ignore x))
401 nil)
402
403 (defun function-returning-t (x)
404 (declare (ignore x))
405 t)
406
407 (defmacro find-class-cell-class (cell)
408 `(car ,cell))
409
410 (defmacro find-class-cell-predicate (cell)
411 `(cadr ,cell))
412
413 (defmacro find-class-cell-make-instance-function-keys (cell)
414 `(cddr ,cell))
415
416 (defmacro make-find-class-cell (class-name)
417 (declare (ignore class-name))
418 '(list* nil #'function-returning-nil nil))
419
420 (defun find-class-cell (symbol &optional dont-create-p)
421 (or (gethash symbol *find-class*)
422 (unless dont-create-p
423 (unless (legal-class-name-p symbol)
424 (error "~S is not a legal class name." symbol))
425 (setf (gethash symbol *find-class*) (make-find-class-cell symbol)))))
426
427 (defvar *create-classes-from-internal-structure-definitions-p* t)
428
429 (defun find-class-from-cell (symbol cell &optional (errorp t))
430 (or (find-class-cell-class cell)
431 (and *create-classes-from-internal-structure-definitions-p*
432 (structure-type-p symbol)
433 (find-structure-class symbol))
434 (cond ((null errorp) nil)
435 ((legal-class-name-p symbol)
436 (error "No class named: ~S." symbol))
437 (t
438 (error "~S is not a legal class name." symbol)))))
439
440 (defun find-class-predicate-from-cell (symbol cell &optional (errorp t))
441 (unless (find-class-cell-class cell)
442 (find-class-from-cell symbol cell errorp))
443 (find-class-cell-predicate cell))
444
445 (defun legal-class-name-p (x)
446 (and (symbolp x)
447 (not (keywordp x))))
448
449 (defun find-class (symbol &optional (errorp t) environment)
450 (declare (ignore environment))
451 (find-class-from-cell
452 symbol (find-class-cell symbol errorp) errorp))
453
454 (defun find-class-predicate (symbol &optional (errorp t) environment)
455 (declare (ignore environment))
456 (find-class-predicate-from-cell
457 symbol (find-class-cell symbol errorp) errorp))
458
459 #-setf
460 (defsetf find-class (symbol &optional (errorp t) environment) (new-value)
461 (declare (ignore errorp environment))
462 `(SETF\ PCL\ FIND-CLASS ,new-value ,symbol))
463
464 (defun #-setf SETF\ PCL\ FIND-CLASS #+setf (setf find-class) (new-value symbol)
465 (declare (special *boot-state*))
466 (if (legal-class-name-p symbol)
467 (let ((cell (find-class-cell symbol)))
468 (setf (find-class-cell-class cell) new-value)
469 (when (or (eq *boot-state* 'complete)
470 (eq *boot-state* 'braid))
471 (setf (find-class-cell-predicate cell)
472 (symbol-function (class-predicate-name new-value)))
473 (when (and new-value (not (forward-referenced-class-p new-value)))
474 (dolist (keys+aok (find-class-cell-make-instance-function-keys cell))
475 (update-initialize-info-internal
476 (initialize-info new-value (car keys+aok) nil (cdr keys+aok))
477 'make-instance-function)))))
478 (error "~S is not a legal class name." symbol)))
479
480 #-setf
481 (defsetf find-class-predicate (symbol &optional (errorp t) environment) (new-value)
482 (declare (ignore errorp environment))
483 `(SETF\ PCL\ FIND-CLASS-PREDICATE ,new-value ,symbol))
484
485 (defun #-setf SETF\ PCL\ FIND-CLASS-PREDICATE #+setf (setf find-class-predicate)
486 (new-value symbol)
487 (if (legal-class-name-p symbol)
488 (setf (find-class-cell-predicate (find-class-cell symbol)) new-value)
489 (error "~S is not a legal class name." symbol)))
490
491 (defun find-wrapper (symbol)
492 (class-wrapper (find-class symbol)))
493
494 #|| ; Anything that used this should use eval instead.
495 (defun reduce-constant (old)
496 (let ((new (eval old)))
497 (if (eq new old)
498 new
499 (if (constantp new)
500 (reduce-constant new)
501 new))))
502 ||#
503
504 (defmacro gathering1 (gatherer &body body)
505 `(gathering ((.gathering1. ,gatherer))
506 (macrolet ((gather1 (x) `(gather ,x .gathering1.)))
507 ,@body)))
508
509 ;;;
510 ;;;
511 ;;;
512 (defmacro vectorizing (&key (size 0))
513 `(let* ((limit ,size)
514 (result (make-array limit))
515 (index 0))
516 (values #'(lambda (value)
517 (if (= index limit)
518 (error "vectorizing more elements than promised.")
519 (progn
520 (setf (svref result index) value)
521 (incf index)
522 value)))
523 #'(lambda () result))))
524
525 ;;;
526 ;;; These are augmented definitions of list-elements and list-tails from
527 ;;; iterate.lisp. These versions provide the extra :by keyword which can
528 ;;; be used to specify the step function through the list.
529 ;;;
530 (defmacro *list-elements (list &key (by #'cdr))
531 `(let ((tail ,list))
532 #'(lambda (finish)
533 (if (endp tail)
534 (funcall finish)
535 (prog1 (car tail)
536 (setq tail (funcall ,by tail)))))))
537
538 (defmacro *list-tails (list &key (by #'cdr))
539 `(let ((tail ,list))
540 #'(lambda (finish)
541 (prog1 (if (endp tail)
542 (funcall finish)
543 tail)
544 (setq tail (funcall ,by tail))))))
545
546 (defmacro function-funcall (form &rest args)
547 #-cmu `(funcall ,form ,@args)
548 #+cmu `(funcall (the function ,form) ,@args))
549
550 (defmacro function-apply (form &rest args)
551 #-cmu `(apply ,form ,@args)
552 #+cmu `(apply (the function ,form) ,@args))
553
554
555 ;;;
556 ;;; Convert a function name to its standard setf function name. We have to
557 ;;; do this hack because not all Common Lisps have yet converted to having
558 ;;; setf function specs.
559 ;;;
560 ;;; In a port that does have setf function specs you can use those just by
561 ;;; making the obvious simple changes to these functions. The rest of PCL
562 ;;; believes that there are function names like (SETF <foo>), this is the
563 ;;; only place that knows about this hack.
564 ;;;
565 (eval-when (compile load eval)
566 ; In 15e (and also 16c), using the built in setf mechanism costs
567 ; a hash table lookup every time a setf function is called.
568 ; Uncomment the next line to use the built in setf mechanism.
569 ;#+cmu (pushnew :setf *features*)
570 )
571
572 (eval-when (compile load eval)
573
574 #-setf
575 (defvar *setf-function-names* (make-hash-table :size 200 :test #'eq))
576
577 (defun get-setf-function-name (name)
578 #+setf `(setf ,name)
579 #-setf
580 (or (gethash name *setf-function-names*)
581 (setf (gethash name *setf-function-names*)
582 (let ((pkg (symbol-package name)))
583 (if pkg
584 (intern (format nil
585 "SETF ~A ~A"
586 (package-name pkg)
587 (symbol-name name))
588 *the-pcl-package*)
589 (make-symbol (format nil "SETF ~A" (symbol-name name))))))))
590
591 ;;;
592 ;;; Call this to define a setf macro for a function with the same behavior as
593 ;;; specified by the SETF function cleanup proposal. Specifically, this will
594 ;;; cause: (SETF (FOO a b) x) to expand to (|SETF FOO| x a b).
595 ;;;
596 ;;; do-standard-defsetf A macro interface for use at top level
597 ;;; in files. Unfortunately, users may
598 ;;; have to use this for a while.
599 ;;;
600 ;;; do-standard-defsetfs-for-defclass A special version called by defclass.
601 ;;;
602 ;;; do-standard-defsetf-1 A functional interface called by the
603 ;;; above, defmethod and defgeneric.
604 ;;; Since this is all a crock anyways,
605 ;;; users are free to call this as well.
606 ;;;
607 (defmacro do-standard-defsetf (&rest function-names)
608 `(eval-when (compile load eval)
609 (dolist (fn-name ',function-names) (do-standard-defsetf-1 fn-name))))
610
611 (defun do-standard-defsetfs-for-defclass (accessors)
612 (dolist (name accessors) (do-standard-defsetf-1 name)))
613
614 (defun do-standard-defsetf-1 (function-name)
615 #+setf
616 (declare (ignore function-name))
617 #+setf nil
618 #-setf
619 (unless (and (setfboundp function-name)
620 (get function-name 'standard-setf))
621 (setf (get function-name 'standard-setf) t)
622 (let* ((setf-function-name (get-setf-function-name function-name)))
623
624 #+Genera
625 (let ((fn #'(lambda (form)
626 (lt::help-defsetf
627 '(&rest accessor-args) '(new-value) function-name 'nil
628 `(`(,',setf-function-name ,new-value .,accessor-args))
629 form))))
630 (setf (get function-name 'lt::setf-method) fn
631 (get function-name 'lt::setf-method-internal) fn))
632
633 #+Lucid
634 (lucid::set-simple-setf-method
635 function-name
636 #'(lambda (form new-value)
637 (let* ((bindings (mapcar #'(lambda (x) `(,(gensym) ,x))
638 (cdr form)))
639 (vars (mapcar #'car bindings)))
640 ;; This may wrap spurious LET bindings around some form,
641 ;; but the PQC compiler will unwrap then.
642 `(LET (,.bindings)
643 (,setf-function-name ,new-value . ,vars)))))
644
645 #+kcl
646 (let ((helper (gensym)))
647 (setf (macro-function helper)
648 #'(lambda (form env)
649 (declare (ignore env))
650 (let* ((loc-args (butlast (cdr form)))
651 (bindings (mapcar #'(lambda (x) `(,(gensym) ,x)) loc-args))
652 (vars (mapcar #'car bindings)))
653 `(let ,bindings
654 (,setf-function-name ,(car (last form)) ,@vars)))))
655 (eval `(defsetf ,function-name ,helper)))
656 #+Xerox
657 (flet ((setf-expander (body env)
658 (declare (ignore env))
659 (let ((temps
660 (mapcar #'(lambda (x) (declare (ignore x)) (gensym))
661 (cdr body)))
662 (forms (cdr body))
663 (vars (list (gensym))))
664 (values temps
665 forms
666 vars
667 `(,setf-function-name ,@vars ,@temps)
668 `(,function-name ,@temps)))))
669 (let ((setf-method-expander (intern (concatenate 'string
670 (symbol-name function-name)
671 "-setf-expander")
672 (symbol-package function-name))))
673 (setf (get function-name :setf-method-expander) setf-method-expander
674 (symbol-function setf-method-expander) #'setf-expander)))
675
676 #-(or Genera Lucid kcl Xerox)
677 (eval `(defsetf ,function-name (&rest accessor-args) (new-value)
678 (let* ((bindings (mapcar #'(lambda (x) `(,(gensym) ,x)) accessor-args))
679 (vars (mapcar #'car bindings)))
680 `(let ,bindings
681 (,',setf-function-name ,new-value ,@vars)))))
682
683 )))
684
685 (defun setfboundp (symbol)
686 #+Genera (not (null (get-properties (symbol-plist symbol)
687 'lt::(derived-setf-function trivial-setf-method
688 setf-equivalence setf-method))))
689 #+Lucid (locally
690 (declare (special lucid::*setf-inverse-table*
691 lucid::*simple-setf-method-table*
692 lucid::*setf-method-expander-table*))
693 (or (gethash symbol lucid::*setf-inverse-table*)
694 (gethash symbol lucid::*simple-setf-method-table*)
695 (gethash symbol lucid::*setf-method-expander-table*)))
696 #+kcl (or (get symbol 'si::setf-method)
697 (get symbol 'si::setf-update-fn)
698 (get symbol 'si::setf-lambda))
699 #+Xerox (or (get symbol :setf-inverse)
700 (get symbol 'il:setf-inverse)
701 (get symbol 'il:setfn)
702 (get symbol :shared-setf-inverse)
703 (get symbol :setf-method-expander)
704 (get symbol 'il:setf-method-expander))
705 #+:coral (or (get symbol 'ccl::setf-inverse)
706 (get symbol 'ccl::setf-method-expander))
707 #+cmu (fboundp `(setf ,symbol))
708 #-(or Genera Lucid KCL Xerox :coral cmu) nil)
709
710 );eval-when
711
712
713 ;;;
714 ;;; PCL, like user code, must endure the fact that we don't have a properly
715 ;;; working setf. Many things work because they get mentioned by a defclass
716 ;;; or defmethod before they are used, but others have to be done by hand.
717 ;;;
718 (do-standard-defsetf
719 class-wrapper ;***
720 generic-function-name
721 method-function-plist
722 method-function-get
723 plist-value
724 object-plist
725 gdefinition
726 slot-value-using-class
727 )
728
729 (defsetf slot-value set-slot-value)
730
731 (defvar *redefined-functions* nil)
732
733 (defmacro original-definition (name)
734 `(get ,name ':definition-before-pcl))
735
736 (defun redefine-function (name new)
737 (pushnew name *redefined-functions*)
738 (unless (original-definition name)
739 (setf (original-definition name)
740 (symbol-function name)))
741 (setf (symbol-function name)
742 (symbol-function new)))
743

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