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14f1d9fe MD |
1 | ;;; installed-scm-file |
2 | ||
bbf8d523 | 3 | ;;;; Copyright (C) 1998,1999,2000,2001,2002, 2003 Free Software Foundation, Inc. |
14f1d9fe MD |
4 | ;;;; |
5 | ;;;; This program is free software; you can redistribute it and/or modify | |
6 | ;;;; it under the terms of the GNU General Public License as published by | |
7 | ;;;; the Free Software Foundation; either version 2, or (at your option) | |
8 | ;;;; any later version. | |
9 | ;;;; | |
10 | ;;;; This program is distributed in the hope that it will be useful, | |
11 | ;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | ;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | ;;;; GNU General Public License for more details. | |
14 | ;;;; | |
15 | ;;;; You should have received a copy of the GNU General Public License | |
16 | ;;;; along with this software; see the file COPYING. If not, write to | |
17 | ;;;; the Free Software Foundation, Inc., 59 Temple Place, Suite 330, | |
18 | ;;;; Boston, MA 02111-1307 USA | |
c22adbeb MV |
19 | ;;;; |
20 | ;;;; As a special exception, the Free Software Foundation gives permission | |
21 | ;;;; for additional uses of the text contained in its release of GUILE. | |
22 | ;;;; | |
23 | ;;;; The exception is that, if you link the GUILE library with other files | |
24 | ;;;; to produce an executable, this does not by itself cause the | |
25 | ;;;; resulting executable to be covered by the GNU General Public License. | |
26 | ;;;; Your use of that executable is in no way restricted on account of | |
27 | ;;;; linking the GUILE library code into it. | |
28 | ;;;; | |
29 | ;;;; This exception does not however invalidate any other reasons why | |
30 | ;;;; the executable file might be covered by the GNU General Public License. | |
31 | ;;;; | |
32 | ;;;; This exception applies only to the code released by the | |
33 | ;;;; Free Software Foundation under the name GUILE. If you copy | |
34 | ;;;; code from other Free Software Foundation releases into a copy of | |
35 | ;;;; GUILE, as the General Public License permits, the exception does | |
36 | ;;;; not apply to the code that you add in this way. To avoid misleading | |
37 | ;;;; anyone as to the status of such modified files, you must delete | |
38 | ;;;; this exception notice from them. | |
39 | ;;;; | |
40 | ;;;; If you write modifications of your own for GUILE, it is your choice | |
41 | ;;;; whether to permit this exception to apply to your modifications. | |
42 | ;;;; If you do not wish that, delete this exception notice. | |
14f1d9fe MD |
43 | ;;;; |
44 | \f | |
45 | ||
46 | ;;;; This software is a derivative work of other copyrighted softwares; the | |
47 | ;;;; copyright notices of these softwares are placed in the file COPYRIGHTS | |
48 | ;;;; | |
49 | ;;;; This file is based upon stklos.stk from the STk distribution by | |
50 | ;;;; Erick Gallesio <eg@unice.fr>. | |
51 | ;;;; | |
52 | ||
53 | (define-module (oop goops) | |
1a179b03 MD |
54 | :export-syntax (define-class class |
55 | define-generic define-accessor define-method | |
f595ccfe | 56 | define-extended-generic define-extended-generics |
1a179b03 MD |
57 | method) |
58 | :export (goops-version is-a? | |
59 | ensure-metaclass ensure-metaclass-with-supers | |
60 | make-class | |
61 | make-generic ensure-generic | |
bbf8d523 | 62 | make-extended-generic |
1a179b03 MD |
63 | make-accessor ensure-accessor |
64 | make-method add-method! | |
65 | object-eqv? object-equal? | |
66 | class-slot-ref class-slot-set! slot-unbound slot-missing | |
67 | slot-definition-name slot-definition-options | |
68 | slot-definition-allocation | |
69 | slot-definition-getter slot-definition-setter | |
70 | slot-definition-accessor | |
71 | slot-definition-init-value slot-definition-init-form | |
72 | slot-definition-init-thunk slot-definition-init-keyword | |
73 | slot-init-function class-slot-definition | |
74 | method-source | |
75 | compute-cpl compute-std-cpl compute-get-n-set compute-slots | |
76 | compute-getter-method compute-setter-method | |
77 | allocate-instance initialize make-instance make | |
78 | no-next-method no-applicable-method no-method | |
79 | change-class update-instance-for-different-class | |
80 | shallow-clone deep-clone | |
81 | class-redefinition | |
82 | apply-generic apply-method apply-methods | |
83 | compute-applicable-methods %compute-applicable-methods | |
84 | method-more-specific? sort-applicable-methods | |
85 | class-subclasses class-methods | |
86 | goops-error | |
87 | min-fixnum max-fixnum | |
88 | ;;; *fixme* Should go into goops.c | |
89 | instance? slot-ref-using-class | |
90 | slot-set-using-class! slot-bound-using-class? | |
91 | slot-exists-using-class? slot-ref slot-set! slot-bound? | |
92 | class-name class-direct-supers class-direct-subclasses | |
93 | class-direct-methods class-direct-slots class-precedence-list | |
94 | class-slots class-environment | |
95 | generic-function-name | |
96 | generic-function-methods method-generic-function method-specializers | |
97 | primitive-generic-generic enable-primitive-generic! | |
98 | method-procedure accessor-method-slot-definition | |
99 | slot-exists? make find-method get-keyword) | |
f595ccfe | 100 | :replace (<class> <operator-class> <entity-class> <entity>) |
1a179b03 | 101 | :re-export (class-of) ;; from (guile) |
78ec533c MV |
102 | :no-backtrace) |
103 | ||
104 | ;; First initialize the builtin part of GOOPS | |
105 | (%init-goops-builtins) | |
106 | ||
107 | ;; Then load the rest of GOOPS | |
108 | (use-modules (oop goops util) | |
109 | (oop goops dispatch) | |
51f7ef47 | 110 | (oop goops compile)) |
14f1d9fe | 111 | |
14f1d9fe MD |
112 | \f |
113 | (define min-fixnum (- (expt 2 29))) | |
114 | ||
115 | (define max-fixnum (- (expt 2 29) 1)) | |
116 | ||
117 | ;; | |
118 | ;; goops-error | |
119 | ;; | |
120 | (define (goops-error format-string . args) | |
121 | (save-stack) | |
122 | (scm-error 'goops-error #f format-string args '())) | |
123 | ||
124 | ;; | |
125 | ;; is-a? | |
126 | ;; | |
127 | (define (is-a? obj class) | |
128 | (and (memq class (class-precedence-list (class-of obj))) #t)) | |
129 | ||
130 | ||
131 | ;;; | |
132 | ;;; {Meta classes} | |
133 | ;;; | |
134 | ||
135 | (define ensure-metaclass-with-supers | |
136 | (let ((table-of-metas '())) | |
137 | (lambda (meta-supers) | |
138 | (let ((entry (assoc meta-supers table-of-metas))) | |
139 | (if entry | |
140 | ;; Found a previously created metaclass | |
141 | (cdr entry) | |
142 | ;; Create a new meta-class which inherit from "meta-supers" | |
143 | (let ((new (make <class> #:dsupers meta-supers | |
144 | #:slots '() | |
145 | #:name (gensym "metaclass")))) | |
146 | (set! table-of-metas (cons (cons meta-supers new) table-of-metas)) | |
147 | new)))))) | |
148 | ||
149 | (define (ensure-metaclass supers env) | |
150 | (if (null? supers) | |
151 | <class> | |
152 | (let* ((all-metas (map (lambda (x) (class-of x)) supers)) | |
153 | (all-cpls (apply append | |
154 | (map (lambda (m) | |
155 | (cdr (class-precedence-list m))) | |
156 | all-metas))) | |
157 | (needed-metas '())) | |
158 | ;; Find the most specific metaclasses. The new metaclass will be | |
159 | ;; a subclass of these. | |
160 | (for-each | |
161 | (lambda (meta) | |
162 | (if (and (not (member meta all-cpls)) | |
163 | (not (member meta needed-metas))) | |
164 | (set! needed-metas (append needed-metas (list meta))))) | |
165 | all-metas) | |
166 | ;; Now return a subclass of the metaclasses we found. | |
167 | (if (null? (cdr needed-metas)) | |
168 | (car needed-metas) ; If there's only one, just use it. | |
169 | (ensure-metaclass-with-supers needed-metas))))) | |
170 | ||
171 | ;;; | |
172 | ;;; {Classes} | |
173 | ;;; | |
174 | ||
175 | ;;; (define-class NAME (SUPER ...) SLOT-DEFINITION ... OPTION ...) | |
176 | ;;; | |
177 | ;;; SLOT-DEFINITION ::= SLOT-NAME | (SLOT-NAME OPTION ...) | |
178 | ;;; OPTION ::= KEYWORD VALUE | |
179 | ;;; | |
180 | (define (define-class-pre-definition keyword exp env) | |
181 | (case keyword | |
182 | ((#:getter #:setter) | |
183 | (if (defined? exp env) | |
184 | `(define ,exp (ensure-generic ,exp ',exp)) | |
185 | `(define ,exp (make-generic ',exp)))) | |
186 | ((#:accessor) | |
187 | (if (defined? exp env) | |
188 | `(define ,exp (ensure-accessor ,exp ',exp)) | |
189 | `(define ,exp (make-accessor ',exp)))) | |
190 | (else #f))) | |
191 | ||
192 | ;;; This code should be implemented in C. | |
193 | ;;; | |
194 | (define define-class | |
195 | (letrec (;; Some slot options require extra definitions to be made. | |
196 | ;; In particular, we want to make sure that the generic | |
197 | ;; function objects which represent accessors exist | |
198 | ;; before `make-class' tries to add methods to them. | |
199 | ;; | |
200 | ;; Postpone error handling to class macro. | |
201 | ;; | |
202 | (pre-definitions | |
203 | (lambda (slots env) | |
204 | (do ((slots slots (cdr slots)) | |
205 | (definitions '() | |
206 | (if (pair? (car slots)) | |
207 | (do ((options (cdar slots) (cddr options)) | |
208 | (definitions definitions | |
209 | (cond ((not (symbol? (cadr options))) | |
210 | definitions) | |
211 | ((define-class-pre-definition | |
212 | (car options) | |
213 | (cadr options) | |
214 | env) | |
215 | => (lambda (definition) | |
216 | (cons definition definitions))) | |
217 | (else definitions)))) | |
218 | ((not (and (pair? options) | |
219 | (pair? (cdr options)))) | |
220 | definitions)) | |
221 | definitions))) | |
222 | ((or (not (pair? slots)) | |
223 | (keyword? (car slots))) | |
224 | (reverse definitions))))) | |
225 | ||
226 | ;; Syntax | |
227 | (name cadr) | |
228 | (slots cdddr)) | |
229 | ||
9ffa41db | 230 | (procedure->memoizing-macro |
14f1d9fe MD |
231 | (lambda (exp env) |
232 | (cond ((not (top-level-env? env)) | |
233 | (goops-error "define-class: Only allowed at top level")) | |
234 | ((not (and (list? exp) (>= (length exp) 3))) | |
235 | (goops-error "missing or extra expression")) | |
236 | (else | |
237 | (let ((name (name exp))) | |
238 | `(begin | |
239 | ;; define accessors | |
240 | ,@(pre-definitions (slots exp) env) | |
9f045403 DH |
241 | ;; update the current-module |
242 | (let* ((class (class ,@(cddr exp) #:name ',name)) | |
243 | (var (module-ensure-local-variable! | |
244 | (current-module) ',name)) | |
245 | (old (and (variable-bound? var) | |
246 | (variable-ref var)))) | |
247 | (if (and old | |
248 | (is-a? old <class>) | |
249 | (memq <object> (class-precedence-list old))) | |
250 | (variable-set! var (class-redefinition old class)) | |
251 | (variable-set! var class))))))))))) | |
14f1d9fe | 252 | |
9089f73c DH |
253 | (defmacro standard-define-class args |
254 | `(define-class ,@args)) | |
14f1d9fe MD |
255 | |
256 | ;;; (class (SUPER ...) SLOT-DEFINITION ... OPTION ...) | |
257 | ;;; | |
258 | ;;; SLOT-DEFINITION ::= SLOT-NAME | (SLOT-NAME OPTION ...) | |
259 | ;;; OPTION ::= KEYWORD VALUE | |
260 | ;;; | |
261 | (define class | |
262 | (letrec ((slot-option-keyword car) | |
263 | (slot-option-value cadr) | |
264 | (process-slot-options | |
265 | (lambda (options) | |
266 | (let loop ((options options) | |
267 | (res '())) | |
268 | (cond ((null? options) | |
269 | (reverse res)) | |
270 | ((null? (cdr options)) | |
271 | (goops-error "malformed slot option list")) | |
272 | ((not (keyword? (slot-option-keyword options))) | |
273 | (goops-error "malformed slot option list")) | |
274 | (else | |
275 | (case (slot-option-keyword options) | |
276 | ((#:init-form) | |
277 | (loop (cddr options) | |
278 | (append (list `(lambda () | |
279 | ,(slot-option-value options)) | |
280 | #:init-thunk | |
281 | (list 'quote | |
282 | (slot-option-value options)) | |
283 | #:init-form) | |
284 | res))) | |
285 | (else | |
286 | (loop (cddr options) | |
287 | (cons (cadr options) | |
288 | (cons (car options) | |
289 | res))))))))))) | |
290 | ||
291 | (procedure->memoizing-macro | |
292 | (let ((supers cadr) | |
293 | (slots cddr) | |
294 | (options cdddr)) | |
295 | (lambda (exp env) | |
296 | (cond ((not (and (list? exp) (>= (length exp) 2))) | |
297 | (goops-error "missing or extra expression")) | |
298 | ((not (list? (supers exp))) | |
299 | (goops-error "malformed superclass list: ~S" (supers exp))) | |
300 | (else | |
301 | (let ((slot-defs (cons #f '()))) | |
302 | (do ((slots (slots exp) (cdr slots)) | |
303 | (defs slot-defs (cdr defs))) | |
304 | ((or (null? slots) | |
305 | (keyword? (car slots))) | |
306 | `(make-class | |
307 | ;; evaluate super class variables | |
308 | (list ,@(supers exp)) | |
309 | ;; evaluate slot definitions, except the slot name! | |
310 | (list ,@(cdr slot-defs)) | |
311 | ;; evaluate class options | |
312 | ,@slots | |
313 | ;; place option last in case someone wants to | |
314 | ;; pass a different value | |
315 | #:environment ',env)) | |
316 | (set-cdr! | |
317 | defs | |
318 | (list (if (pair? (car slots)) | |
319 | `(list ',(slot-definition-name (car slots)) | |
320 | ,@(process-slot-options | |
321 | (slot-definition-options | |
322 | (car slots)))) | |
323 | `(list ',(car slots)))))))))))))) | |
324 | ||
325 | (define (make-class supers slots . options) | |
326 | (let ((env (or (get-keyword #:environment options #f) | |
327 | (top-level-env)))) | |
328 | (let* ((name (get-keyword #:name options (make-unbound))) | |
329 | (supers (if (not (or-map (lambda (class) | |
330 | (memq <object> | |
331 | (class-precedence-list class))) | |
332 | supers)) | |
333 | (append supers (list <object>)) | |
334 | supers)) | |
335 | (metaclass (or (get-keyword #:metaclass options #f) | |
336 | (ensure-metaclass supers env)))) | |
337 | ||
338 | ;; Verify that all direct slots are different and that we don't inherit | |
339 | ;; several time from the same class | |
340 | (let ((tmp1 (find-duplicate supers)) | |
341 | (tmp2 (find-duplicate (map slot-definition-name slots)))) | |
342 | (if tmp1 | |
343 | (goops-error "make-class: super class ~S is duplicate in class ~S" | |
344 | tmp1 name)) | |
345 | (if tmp2 | |
346 | (goops-error "make-class: slot ~S is duplicate in class ~S" | |
347 | tmp2 name))) | |
348 | ||
349 | ;; Everything seems correct, build the class | |
350 | (apply make metaclass | |
351 | #:dsupers supers | |
352 | #:slots slots | |
353 | #:name name | |
354 | #:environment env | |
355 | options)))) | |
356 | ||
357 | ;;; | |
358 | ;;; {Generic functions and accessors} | |
359 | ;;; | |
360 | ||
361 | (define define-generic | |
9ffa41db | 362 | (procedure->memoizing-macro |
14f1d9fe MD |
363 | (lambda (exp env) |
364 | (let ((name (cadr exp))) | |
365 | (cond ((not (symbol? name)) | |
366 | (goops-error "bad generic function name: ~S" name)) | |
33e04d54 DH |
367 | ((top-level-env? env) |
368 | `(let* ((var (module-ensure-local-variable! | |
369 | (current-module) ',name)) | |
370 | (old (and (variable-bound? var) (variable-ref var)))) | |
371 | (if (or (not old) (is-a? old <generic>)) | |
372 | (variable-set! var (make <generic> #:name ',name)) | |
373 | (variable-set! var (ensure-generic old ',name))))) | |
14f1d9fe MD |
374 | (else |
375 | `(define ,name (make <generic> #:name ',name)))))))) | |
376 | ||
bbf8d523 MD |
377 | (define define-extended-generic |
378 | (procedure->memoizing-macro | |
379 | (lambda (exp env) | |
380 | (let ((name (cadr exp))) | |
381 | (cond ((not (symbol? name)) | |
382 | (goops-error "bad generic function name: ~S" name)) | |
383 | ((null? (cddr exp)) | |
384 | (goops-error "missing expression")) | |
385 | (else | |
386 | `(define ,name (make-extended-generic ,(caddr exp) ',name)))))))) | |
f595ccfe MD |
387 | (define define-extended-generics |
388 | (procedure->memoizing-macro | |
389 | (lambda (exp env) | |
390 | (let ((names (cadr exp)) | |
391 | (prefixes (get-keyword #:prefix (cddr exp) #f))) | |
392 | (if prefixes | |
393 | `(begin | |
394 | ,@(map (lambda (name) | |
395 | `(define-extended-generic ,name | |
396 | (list ,@(map (lambda (prefix) | |
397 | (symbol-append prefix name)) | |
398 | prefixes)))) | |
399 | names)) | |
400 | (goops-error "no prefixes supplied")))))) | |
bbf8d523 | 401 | |
14f1d9fe MD |
402 | (define (make-generic . name) |
403 | (let ((name (and (pair? name) (car name)))) | |
404 | (make <generic> #:name name))) | |
405 | ||
bbf8d523 MD |
406 | (define (make-extended-generic gfs . name) |
407 | (let* ((name (and (pair? name) (car name))) | |
408 | (gfs (if (pair? gfs) gfs (list gfs))) | |
409 | (gws? (any (lambda (gf) (is-a? gf <generic-with-setter>)) gfs))) | |
410 | (let ((ans (if gws? | |
411 | (let* ((sname (and name (make-setter-name name))) | |
412 | (setters | |
413 | (apply append | |
414 | (map (lambda (gf) | |
415 | (if (is-a? gf <generic-with-setter>) | |
416 | (list (ensure-generic (setter gf) | |
417 | sname)) | |
418 | '())) | |
419 | gfs))) | |
420 | (es (make <extended-generic-with-setter> | |
421 | #:name name | |
422 | #:extends gfs | |
423 | #:setter (make <extended-generic> | |
424 | #:name sname | |
425 | #:extends setters)))) | |
426 | (extended-by! setters (setter es)) | |
427 | es) | |
428 | (make <extended-generic> | |
429 | #:name name | |
430 | #:extends gfs)))) | |
431 | (extended-by! gfs ans) | |
432 | ans))) | |
433 | ||
434 | (define (extended-by! gfs eg) | |
435 | (for-each (lambda (gf) | |
436 | (slot-set! gf 'extended-by | |
437 | (cons eg (slot-ref gf 'extended-by)))) | |
438 | gfs)) | |
439 | ||
440 | (define (not-extended-by! gfs eg) | |
441 | (for-each (lambda (gf) | |
442 | (slot-set! gf 'extended-by | |
443 | (delq! eg (slot-ref gf 'extended-by)))) | |
444 | gfs)) | |
445 | ||
14f1d9fe MD |
446 | (define (ensure-generic old-definition . name) |
447 | (let ((name (and (pair? name) (car name)))) | |
448 | (cond ((is-a? old-definition <generic>) old-definition) | |
449 | ((procedure-with-setter? old-definition) | |
450 | (make <generic-with-setter> | |
451 | #:name name | |
452 | #:default (procedure old-definition) | |
453 | #:setter (setter old-definition))) | |
454 | ((procedure? old-definition) | |
455 | (make <generic> #:name name #:default old-definition)) | |
456 | (else (make <generic> #:name name))))) | |
457 | ||
458 | (define define-accessor | |
9ffa41db | 459 | (procedure->memoizing-macro |
14f1d9fe MD |
460 | (lambda (exp env) |
461 | (let ((name (cadr exp))) | |
462 | (cond ((not (symbol? name)) | |
463 | (goops-error "bad accessor name: ~S" name)) | |
33e04d54 DH |
464 | ((top-level-env? env) |
465 | `(let* ((var (module-ensure-local-variable! | |
466 | (current-module) ',name)) | |
467 | (old (and (variable-bound? var) (variable-ref var)))) | |
468 | (if (or (not old) | |
469 | (and (is-a? old <generic-with-setter>) | |
470 | (is-a? (setter old) <generic>))) | |
471 | (variable-set! var (make-accessor ',name)) | |
472 | (variable-set! var (ensure-accessor old ',name))))) | |
14f1d9fe MD |
473 | (else |
474 | `(define ,name (make-accessor ',name)))))))) | |
475 | ||
476 | (define (make-setter-name name) | |
477 | (string->symbol (string-append "setter:" (symbol->string name)))) | |
478 | ||
479 | (define (make-accessor . name) | |
480 | (let ((name (and (pair? name) (car name)))) | |
481 | (make <generic-with-setter> | |
482 | #:name name | |
483 | #:setter (make <generic> | |
484 | #:name (and name (make-setter-name name)))))) | |
485 | ||
486 | (define (ensure-accessor proc . name) | |
487 | (let ((name (and (pair? name) (car name)))) | |
488 | (cond ((is-a? proc <generic-with-setter>) | |
489 | (if (is-a? (setter proc) <generic>) | |
490 | proc | |
491 | (upgrade-generic-with-setter proc (setter proc)))) | |
492 | ((is-a? proc <generic>) | |
493 | (upgrade-generic-with-setter proc (make-generic name))) | |
494 | ((procedure-with-setter? proc) | |
495 | (make <generic-with-setter> | |
496 | #:name name | |
497 | #:default (procedure proc) | |
498 | #:setter (ensure-generic (setter proc) name))) | |
499 | ((procedure? proc) | |
500 | (ensure-accessor (ensure-generic proc name) name)) | |
501 | (else | |
502 | (make-accessor name))))) | |
503 | ||
504 | (define (upgrade-generic-with-setter generic setter) | |
bbf8d523 MD |
505 | (let ((methods (slot-ref generic 'methods)) |
506 | (gws (make (if (is-a? generic <extended-generic>) | |
507 | <extended-generic-with-setter> | |
508 | <generic-with-setter>) | |
14f1d9fe | 509 | #:name (generic-function-name generic) |
bbf8d523 | 510 | #:extended-by (slot-ref generic 'extended-by) |
14f1d9fe | 511 | #:setter setter))) |
bbf8d523 MD |
512 | (if (is-a? generic <extended-generic>) |
513 | (let ((gfs (slot-ref generic 'extends))) | |
514 | (not-extended-by! gfs generic) | |
515 | (slot-set! gws 'extends gfs) | |
516 | (extended-by! gfs gws))) | |
14f1d9fe MD |
517 | ;; Steal old methods |
518 | (for-each (lambda (method) | |
519 | (slot-set! method 'generic-function gws)) | |
520 | methods) | |
521 | (slot-set! gws 'methods methods) | |
522 | gws)) | |
523 | ||
524 | ;;; | |
525 | ;;; {Methods} | |
526 | ;;; | |
527 | ||
528 | (define define-method | |
529 | (procedure->memoizing-macro | |
530 | (lambda (exp env) | |
71d540f7 MD |
531 | (let ((head (cadr exp))) |
532 | (if (not (pair? head)) | |
533 | (goops-error "bad method head: ~S" head) | |
534 | (let ((gf (car head))) | |
535 | (cond ((and (pair? gf) | |
536 | (eq? (car gf) 'setter) | |
537 | (pair? (cdr gf)) | |
538 | (symbol? (cadr gf)) | |
539 | (null? (cddr gf))) | |
540 | ;; named setter method | |
541 | (let ((name (cadr gf))) | |
542 | (cond ((not (symbol? name)) | |
543 | `(add-method! (setter ,name) | |
544 | (method ,(cdadr exp) | |
545 | ,@(cddr exp)))) | |
546 | ((defined? name env) | |
547 | `(begin | |
548 | ;; *fixme* Temporary hack for the current | |
549 | ;; module system | |
550 | (if (not ,name) | |
551 | (define-accessor ,name)) | |
552 | (add-method! (setter ,name) | |
553 | (method ,(cdadr exp) | |
554 | ,@(cddr exp))))) | |
555 | (else | |
556 | `(begin | |
557 | (define-accessor ,name) | |
558 | (add-method! (setter ,name) | |
559 | (method ,(cdadr exp) | |
560 | ,@(cddr exp)))))))) | |
561 | ((not (symbol? gf)) | |
562 | `(add-method! ,gf (method ,(cdadr exp) ,@(cddr exp)))) | |
563 | ((defined? gf env) | |
14f1d9fe | 564 | `(begin |
71d540f7 MD |
565 | ;; *fixme* Temporary hack for the current |
566 | ;; module system | |
567 | (if (not ,gf) | |
568 | (define-generic ,gf)) | |
569 | (add-method! ,gf | |
570 | (method ,(cdadr exp) | |
571 | ,@(cddr exp))))) | |
14f1d9fe MD |
572 | (else |
573 | `(begin | |
71d540f7 MD |
574 | (define-generic ,gf) |
575 | (add-method! ,gf | |
576 | (method ,(cdadr exp) | |
577 | ,@(cddr exp)))))))))))) | |
14f1d9fe MD |
578 | |
579 | (define (make-method specializers procedure) | |
580 | (make <method> | |
581 | #:specializers specializers | |
582 | #:procedure procedure)) | |
583 | ||
584 | (define method | |
585 | (letrec ((specializers | |
586 | (lambda (ls) | |
27b32aad | 587 | (cond ((null? ls) (list (list 'quote '()))) |
14f1d9fe MD |
588 | ((pair? ls) (cons (if (pair? (car ls)) |
589 | (cadar ls) | |
590 | '<top>) | |
591 | (specializers (cdr ls)))) | |
592 | (else '(<top>))))) | |
593 | (formals | |
594 | (lambda (ls) | |
595 | (if (pair? ls) | |
596 | (cons (if (pair? (car ls)) (caar ls) (car ls)) | |
597 | (formals (cdr ls))) | |
598 | ls)))) | |
599 | (procedure->memoizing-macro | |
600 | (lambda (exp env) | |
601 | (let ((args (cadr exp)) | |
602 | (body (cddr exp))) | |
603 | `(make <method> | |
d3299bc3 | 604 | #:specializers (cons* ,@(specializers args)) |
14f1d9fe | 605 | #:procedure (lambda ,(formals args) |
cc6c7fee MD |
606 | ,@(if (null? body) |
607 | (list *unspecified*) | |
608 | body)))))))) | |
14f1d9fe MD |
609 | |
610 | ;;; | |
611 | ;;; {add-method!} | |
612 | ;;; | |
613 | ||
614 | (define (add-method-in-classes! m) | |
615 | ;; Add method in all the classes which appears in its specializers list | |
616 | (for-each* (lambda (x) | |
617 | (let ((dm (class-direct-methods x))) | |
618 | (if (not (memv m dm)) | |
619 | (slot-set! x 'direct-methods (cons m dm))))) | |
620 | (method-specializers m))) | |
621 | ||
622 | (define (remove-method-in-classes! m) | |
623 | ;; Remove method in all the classes which appears in its specializers list | |
624 | (for-each* (lambda (x) | |
625 | (slot-set! x | |
626 | 'direct-methods | |
627 | (delv! m (class-direct-methods x)))) | |
628 | (method-specializers m))) | |
629 | ||
630 | (define (compute-new-list-of-methods gf new) | |
631 | (let ((new-spec (method-specializers new)) | |
bbf8d523 | 632 | (methods (slot-ref gf 'methods))) |
14f1d9fe MD |
633 | (let loop ((l methods)) |
634 | (if (null? l) | |
635 | (cons new methods) | |
636 | (if (equal? (method-specializers (car l)) new-spec) | |
637 | (begin | |
638 | ;; This spec. list already exists. Remove old method from dependents | |
639 | (remove-method-in-classes! (car l)) | |
640 | (set-car! l new) | |
641 | methods) | |
642 | (loop (cdr l))))))) | |
643 | ||
644 | (define (internal-add-method! gf m) | |
645 | (slot-set! m 'generic-function gf) | |
646 | (slot-set! gf 'methods (compute-new-list-of-methods gf m)) | |
647 | (let ((specializers (slot-ref m 'specializers))) | |
648 | (slot-set! gf 'n-specialized | |
81211c73 MD |
649 | (max (length* specializers) |
650 | (slot-ref gf 'n-specialized)))) | |
14f1d9fe MD |
651 | (%invalidate-method-cache! gf) |
652 | (add-method-in-classes! m) | |
653 | *unspecified*) | |
654 | ||
655 | (define-generic add-method!) | |
656 | ||
657 | (internal-add-method! add-method! | |
658 | (make <method> | |
659 | #:specializers (list <generic> <method>) | |
660 | #:procedure internal-add-method!)) | |
661 | ||
71d540f7 | 662 | (define-method (add-method! (proc <procedure>) (m <method>)) |
14f1d9fe MD |
663 | (if (generic-capability? proc) |
664 | (begin | |
665 | (enable-primitive-generic! proc) | |
666 | (add-method! proc m)) | |
667 | (next-method))) | |
668 | ||
71d540f7 | 669 | (define-method (add-method! (pg <primitive-generic>) (m <method>)) |
14f1d9fe MD |
670 | (add-method! (primitive-generic-generic pg) m)) |
671 | ||
71d540f7 | 672 | (define-method (add-method! obj (m <method>)) |
14f1d9fe MD |
673 | (goops-error "~S is not a valid generic function" obj)) |
674 | ||
675 | ;;; | |
676 | ;;; {Access to meta objects} | |
677 | ;;; | |
678 | ||
679 | ;;; | |
680 | ;;; Methods | |
681 | ;;; | |
71d540f7 | 682 | (define-method (method-source (m <method>)) |
14f1d9fe MD |
683 | (let* ((spec (map* class-name (slot-ref m 'specializers))) |
684 | (proc (procedure-source (slot-ref m 'procedure))) | |
685 | (args (cadr proc)) | |
686 | (body (cddr proc))) | |
687 | (cons 'method | |
688 | (cons (map* list args spec) | |
689 | body)))) | |
690 | ||
691 | ;;; | |
692 | ;;; Slots | |
693 | ;;; | |
694 | (define slot-definition-name car) | |
695 | ||
696 | (define slot-definition-options cdr) | |
697 | ||
698 | (define (slot-definition-allocation s) | |
699 | (get-keyword #:allocation (cdr s) #:instance)) | |
700 | ||
701 | (define (slot-definition-getter s) | |
702 | (get-keyword #:getter (cdr s) #f)) | |
703 | ||
704 | (define (slot-definition-setter s) | |
705 | (get-keyword #:setter (cdr s) #f)) | |
706 | ||
707 | (define (slot-definition-accessor s) | |
708 | (get-keyword #:accessor (cdr s) #f)) | |
709 | ||
710 | (define (slot-definition-init-value s) | |
711 | ;; can be #f, so we can't use #f as non-value | |
712 | (get-keyword #:init-value (cdr s) (make-unbound))) | |
713 | ||
714 | (define (slot-definition-init-form s) | |
715 | (get-keyword #:init-form (cdr s) (make-unbound))) | |
716 | ||
717 | (define (slot-definition-init-thunk s) | |
718 | (get-keyword #:init-thunk (cdr s) #f)) | |
719 | ||
720 | (define (slot-definition-init-keyword s) | |
721 | (get-keyword #:init-keyword (cdr s) #f)) | |
722 | ||
723 | (define (class-slot-definition class slot-name) | |
724 | (assq slot-name (class-slots class))) | |
725 | ||
726 | (define (slot-init-function class slot-name) | |
727 | (cadr (assq slot-name (slot-ref class 'getters-n-setters)))) | |
728 | ||
729 | ||
730 | ;;; | |
731 | ;;; {Standard methods used by the C runtime} | |
732 | ;;; | |
733 | ||
734 | ;;; Methods to compare objects | |
735 | ;;; | |
736 | ||
a48d60b1 MD |
737 | (define-method (equal? x y) #f) |
738 | ||
71d540f7 MD |
739 | (define-method (object-eqv? x y) #f) |
740 | (define-method (object-equal? x y) (eqv? x y)) | |
14f1d9fe MD |
741 | |
742 | ;;; | |
743 | ;;; methods to display/write an object | |
744 | ;;; | |
745 | ||
746 | ; Code for writing objects must test that the slots they use are | |
747 | ; bound. Otherwise a slot-unbound method will be called and will | |
748 | ; conduct to an infinite loop. | |
749 | ||
750 | ;; Write | |
751 | (define (display-address o file) | |
752 | (display (number->string (object-address o) 16) file)) | |
753 | ||
71d540f7 | 754 | (define-method (write o file) |
14f1d9fe MD |
755 | (display "#<instance " file) |
756 | (display-address o file) | |
757 | (display #\> file)) | |
758 | ||
759 | (define write-object (primitive-generic-generic write)) | |
760 | ||
71d540f7 | 761 | (define-method (write (o <object>) file) |
14f1d9fe MD |
762 | (let ((class (class-of o))) |
763 | (if (slot-bound? class 'name) | |
764 | (begin | |
765 | (display "#<" file) | |
766 | (display (class-name class) file) | |
767 | (display #\space file) | |
768 | (display-address o file) | |
769 | (display #\> file)) | |
770 | (next-method)))) | |
771 | ||
71d540f7 | 772 | (define-method (write (o <foreign-object>) file) |
14f1d9fe MD |
773 | (let ((class (class-of o))) |
774 | (if (slot-bound? class 'name) | |
775 | (begin | |
776 | (display "#<foreign-object " file) | |
777 | (display (class-name class) file) | |
778 | (display #\space file) | |
779 | (display-address o file) | |
780 | (display #\> file)) | |
781 | (next-method)))) | |
782 | ||
71d540f7 | 783 | (define-method (write (class <class>) file) |
14f1d9fe MD |
784 | (let ((meta (class-of class))) |
785 | (if (and (slot-bound? class 'name) | |
786 | (slot-bound? meta 'name)) | |
787 | (begin | |
788 | (display "#<" file) | |
789 | (display (class-name meta) file) | |
790 | (display #\space file) | |
791 | (display (class-name class) file) | |
792 | (display #\space file) | |
793 | (display-address class file) | |
794 | (display #\> file)) | |
795 | (next-method)))) | |
796 | ||
71d540f7 | 797 | (define-method (write (gf <generic>) file) |
14f1d9fe MD |
798 | (let ((meta (class-of gf))) |
799 | (if (and (slot-bound? meta 'name) | |
800 | (slot-bound? gf 'methods)) | |
801 | (begin | |
802 | (display "#<" file) | |
803 | (display (class-name meta) file) | |
804 | (let ((name (generic-function-name gf))) | |
805 | (if name | |
806 | (begin | |
807 | (display #\space file) | |
808 | (display name file)))) | |
809 | (display " (" file) | |
810 | (display (length (generic-function-methods gf)) file) | |
811 | (display ")>" file)) | |
812 | (next-method)))) | |
813 | ||
71d540f7 | 814 | (define-method (write (o <method>) file) |
14f1d9fe MD |
815 | (let ((meta (class-of o))) |
816 | (if (and (slot-bound? meta 'name) | |
817 | (slot-bound? o 'specializers)) | |
818 | (begin | |
819 | (display "#<" file) | |
820 | (display (class-name meta) file) | |
821 | (display #\space file) | |
822 | (display (map* (lambda (spec) | |
823 | (if (slot-bound? spec 'name) | |
824 | (slot-ref spec 'name) | |
825 | spec)) | |
826 | (method-specializers o)) | |
827 | file) | |
828 | (display #\space file) | |
829 | (display-address o file) | |
830 | (display #\> file)) | |
831 | (next-method)))) | |
832 | ||
833 | ;; Display (do the same thing as write by default) | |
71d540f7 | 834 | (define-method (display o file) |
14f1d9fe MD |
835 | (write-object o file)) |
836 | ||
7b07e5ef MD |
837 | ;;; |
838 | ;;; Handling of duplicate bindings in the module system | |
839 | ;;; | |
840 | ||
841 | (define-method (merge-generics (module <module>) | |
842 | (name <symbol>) | |
843 | (int1 <module>) | |
844 | (val1 <top>) | |
845 | (int2 <module>) | |
846 | (val2 <top>) | |
847 | (var <top>) | |
848 | (val <top>)) | |
849 | #f) | |
850 | ||
851 | (define-method (merge-generics (module <module>) | |
852 | (name <symbol>) | |
853 | (int1 <module>) | |
854 | (val1 <generic>) | |
855 | (int2 <module>) | |
856 | (val2 <generic>) | |
857 | (var <top>) | |
858 | (val <boolean>)) | |
859 | (make-variable (make-extended-generic (list val2 val1) name))) | |
860 | ||
861 | (define-method (merge-generics (module <module>) | |
862 | (name <symbol>) | |
863 | (int1 <module>) | |
864 | (val1 <generic>) | |
865 | (int2 <module>) | |
866 | (val2 <generic>) | |
867 | (var <top>) | |
868 | (gf <extended-generic>)) | |
869 | (slot-set! gf | |
870 | 'extends | |
871 | (cons val2 (delq! val2 (slot-ref gf 'extends)))) | |
872 | (slot-set! val2 | |
873 | 'extended-by | |
874 | (cons gf (delq! gf (slot-ref val2 'extended-by)))) | |
875 | var) | |
876 | ||
877 | (module-define! duplicate-handlers 'merge-generics merge-generics) | |
878 | ||
14f1d9fe MD |
879 | ;;; |
880 | ;;; slot access | |
881 | ;;; | |
882 | ||
883 | (define (class-slot-g-n-s class slot-name) | |
884 | (let* ((this-slot (assq slot-name (slot-ref class 'slots))) | |
885 | (g-n-s (cddr (or (assq slot-name (slot-ref class 'getters-n-setters)) | |
886 | (slot-missing class slot-name))))) | |
887 | (if (not (memq (slot-definition-allocation this-slot) | |
888 | '(#:class #:each-subclass))) | |
889 | (slot-missing class slot-name)) | |
890 | g-n-s)) | |
891 | ||
892 | (define (class-slot-ref class slot) | |
893 | (let ((x ((car (class-slot-g-n-s class slot)) #f))) | |
894 | (if (unbound? x) | |
895 | (slot-unbound class slot) | |
896 | x))) | |
897 | ||
898 | (define (class-slot-set! class slot value) | |
899 | ((cadr (class-slot-g-n-s class slot)) #f value)) | |
900 | ||
71d540f7 | 901 | (define-method (slot-unbound (c <class>) (o <object>) s) |
14f1d9fe MD |
902 | (goops-error "Slot `~S' is unbound in object ~S" s o)) |
903 | ||
71d540f7 | 904 | (define-method (slot-unbound (c <class>) s) |
14f1d9fe MD |
905 | (goops-error "Slot `~S' is unbound in class ~S" s c)) |
906 | ||
71d540f7 | 907 | (define-method (slot-unbound (o <object>)) |
14f1d9fe MD |
908 | (goops-error "Unbound slot in object ~S" o)) |
909 | ||
71d540f7 | 910 | (define-method (slot-missing (c <class>) (o <object>) s) |
14f1d9fe MD |
911 | (goops-error "No slot with name `~S' in object ~S" s o)) |
912 | ||
71d540f7 | 913 | (define-method (slot-missing (c <class>) s) |
14f1d9fe MD |
914 | (goops-error "No class slot with name `~S' in class ~S" s c)) |
915 | ||
916 | ||
71d540f7 | 917 | (define-method (slot-missing (c <class>) (o <object>) s value) |
14f1d9fe MD |
918 | (slot-missing c o s)) |
919 | ||
920 | ;;; Methods for the possible error we can encounter when calling a gf | |
921 | ||
71d540f7 | 922 | (define-method (no-next-method (gf <generic>) args) |
14f1d9fe MD |
923 | (goops-error "No next method when calling ~S\nwith arguments ~S" gf args)) |
924 | ||
71d540f7 | 925 | (define-method (no-applicable-method (gf <generic>) args) |
14f1d9fe MD |
926 | (goops-error "No applicable method for ~S in call ~S" |
927 | gf (cons (generic-function-name gf) args))) | |
928 | ||
71d540f7 | 929 | (define-method (no-method (gf <generic>) args) |
14f1d9fe MD |
930 | (goops-error "No method defined for ~S" gf)) |
931 | ||
932 | ;;; | |
933 | ;;; {Cloning functions (from rdeline@CS.CMU.EDU)} | |
934 | ;;; | |
935 | ||
71d540f7 | 936 | (define-method (shallow-clone (self <object>)) |
14f1d9fe MD |
937 | (let ((clone (%allocate-instance (class-of self) '())) |
938 | (slots (map slot-definition-name | |
939 | (class-slots (class-of self))))) | |
940 | (for-each (lambda (slot) | |
941 | (if (slot-bound? self slot) | |
942 | (slot-set! clone slot (slot-ref self slot)))) | |
943 | slots) | |
944 | clone)) | |
945 | ||
71d540f7 | 946 | (define-method (deep-clone (self <object>)) |
14f1d9fe MD |
947 | (let ((clone (%allocate-instance (class-of self) '())) |
948 | (slots (map slot-definition-name | |
949 | (class-slots (class-of self))))) | |
950 | (for-each (lambda (slot) | |
951 | (if (slot-bound? self slot) | |
952 | (slot-set! clone slot | |
953 | (let ((value (slot-ref self slot))) | |
954 | (if (instance? value) | |
955 | (deep-clone value) | |
956 | value))))) | |
957 | slots) | |
958 | clone)) | |
959 | ||
960 | ;;; | |
961 | ;;; {Class redefinition utilities} | |
962 | ;;; | |
963 | ||
964 | ;;; (class-redefinition OLD NEW) | |
965 | ;;; | |
966 | ||
967 | ;;; Has correct the following conditions: | |
968 | ||
969 | ;;; Methods | |
970 | ;;; | |
971 | ;;; 1. New accessor specializers refer to new header | |
972 | ;;; | |
973 | ;;; Classes | |
974 | ;;; | |
975 | ;;; 1. New class cpl refers to the new class header | |
976 | ;;; 2. Old class header exists on old super classes direct-subclass lists | |
977 | ;;; 3. New class header exists on new super classes direct-subclass lists | |
978 | ||
71d540f7 | 979 | (define-method (class-redefinition (old <class>) (new <class>)) |
14f1d9fe MD |
980 | ;; Work on direct methods: |
981 | ;; 1. Remove accessor methods from the old class | |
982 | ;; 2. Patch the occurences of new in the specializers by old | |
983 | ;; 3. Displace the methods from old to new | |
984 | (remove-class-accessors! old) ;; -1- | |
985 | (let ((methods (class-direct-methods new))) | |
986 | (for-each (lambda (m) | |
987 | (update-direct-method! m new old)) ;; -2- | |
988 | methods) | |
989 | (slot-set! new | |
990 | 'direct-methods | |
991 | (append methods (class-direct-methods old)))) | |
992 | ||
993 | ;; Substitute old for new in new cpl | |
994 | (set-car! (slot-ref new 'cpl) old) | |
995 | ||
996 | ;; Remove the old class from the direct-subclasses list of its super classes | |
997 | (for-each (lambda (c) (slot-set! c 'direct-subclasses | |
998 | (delv! old (class-direct-subclasses c)))) | |
999 | (class-direct-supers old)) | |
1000 | ||
1001 | ;; Replace the new class with the old in the direct-subclasses of the supers | |
1002 | (for-each (lambda (c) | |
1003 | (slot-set! c 'direct-subclasses | |
1004 | (cons old (delv! new (class-direct-subclasses c))))) | |
1005 | (class-direct-supers new)) | |
1006 | ||
1007 | ;; Swap object headers | |
1008 | (%modify-class old new) | |
1009 | ||
1010 | ;; Now old is NEW! | |
1011 | ||
1012 | ;; Redefine all the subclasses of old to take into account modification | |
1013 | (for-each | |
1014 | (lambda (c) | |
1015 | (update-direct-subclass! c new old)) | |
1016 | (class-direct-subclasses new)) | |
1017 | ||
1018 | ;; Invalidate class so that subsequent instances slot accesses invoke | |
1019 | ;; change-object-class | |
1020 | (slot-set! new 'redefined old) | |
1021 | (%invalidate-class new) ;must come after slot-set! | |
1022 | ||
1023 | old) | |
1024 | ||
1025 | ;;; | |
1026 | ;;; remove-class-accessors! | |
1027 | ;;; | |
1028 | ||
71d540f7 | 1029 | (define-method (remove-class-accessors! (c <class>)) |
14f1d9fe MD |
1030 | (for-each (lambda (m) |
1031 | (if (is-a? m <accessor-method>) | |
1032 | (remove-method-in-classes! m))) | |
1033 | (class-direct-methods c))) | |
1034 | ||
1035 | ;;; | |
1036 | ;;; update-direct-method! | |
1037 | ;;; | |
1038 | ||
71d540f7 | 1039 | (define-method (update-direct-method! (m <method>) |
14f1d9fe MD |
1040 | (old <class>) |
1041 | (new <class>)) | |
1042 | (let loop ((l (method-specializers m))) | |
1043 | ;; Note: the <top> in dotted list is never used. | |
1044 | ;; So we can work as if we had only proper lists. | |
1045 | (if (pair? l) | |
1046 | (begin | |
1047 | (if (eqv? (car l) old) | |
1048 | (set-car! l new)) | |
1049 | (loop (cdr l)))))) | |
1050 | ||
1051 | ;;; | |
1052 | ;;; update-direct-subclass! | |
1053 | ;;; | |
1054 | ||
71d540f7 | 1055 | (define-method (update-direct-subclass! (c <class>) |
14f1d9fe MD |
1056 | (old <class>) |
1057 | (new <class>)) | |
1058 | (class-redefinition c | |
1059 | (make-class (class-direct-supers c) | |
1060 | (class-direct-slots c) | |
1061 | #:name (class-name c) | |
1062 | #:environment (slot-ref c 'environment) | |
1063 | #:metaclass (class-of c)))) | |
1064 | ||
1065 | ;;; | |
1066 | ;;; {Utilities for INITIALIZE methods} | |
1067 | ;;; | |
1068 | ||
1069 | ;;; compute-slot-accessors | |
1070 | ;;; | |
1071 | (define (compute-slot-accessors class slots env) | |
1072 | (for-each | |
1073 | (lambda (s g-n-s) | |
1074 | (let ((name (slot-definition-name s)) | |
1075 | (getter-function (slot-definition-getter s)) | |
1076 | (setter-function (slot-definition-setter s)) | |
1077 | (accessor (slot-definition-accessor s))) | |
1078 | (if getter-function | |
1079 | (add-method! getter-function | |
1080 | (compute-getter-method class g-n-s))) | |
1081 | (if setter-function | |
1082 | (add-method! setter-function | |
1083 | (compute-setter-method class g-n-s))) | |
1084 | (if accessor | |
1085 | (begin | |
1086 | (add-method! accessor | |
1087 | (compute-getter-method class g-n-s)) | |
1088 | (add-method! (setter accessor) | |
1089 | (compute-setter-method class g-n-s)))))) | |
1090 | slots (slot-ref class 'getters-n-setters))) | |
1091 | ||
71d540f7 | 1092 | (define-method (compute-getter-method (class <class>) slotdef) |
14f1d9fe MD |
1093 | (let ((init-thunk (cadr slotdef)) |
1094 | (g-n-s (cddr slotdef))) | |
1095 | (make <accessor-method> | |
1096 | #:specializers (list class) | |
1097 | #:procedure (cond ((pair? g-n-s) | |
1098 | (if init-thunk | |
1099 | (car g-n-s) | |
1100 | (make-generic-bound-check-getter (car g-n-s)) | |
1101 | )) | |
1102 | (init-thunk | |
1103 | (standard-get g-n-s)) | |
1104 | (else | |
1105 | (bound-check-get g-n-s))) | |
1106 | #:slot-definition slotdef))) | |
1107 | ||
71d540f7 | 1108 | (define-method (compute-setter-method (class <class>) slotdef) |
14f1d9fe MD |
1109 | (let ((g-n-s (cddr slotdef))) |
1110 | (make <accessor-method> | |
1111 | #:specializers (list class <top>) | |
1112 | #:procedure (if (pair? g-n-s) | |
1113 | (cadr g-n-s) | |
1114 | (standard-set g-n-s)) | |
1115 | #:slot-definition slotdef))) | |
1116 | ||
1117 | (define (make-generic-bound-check-getter proc) | |
1118 | (let ((source (and (closure? proc) (procedure-source proc)))) | |
1119 | (if (and source (null? (cdddr source))) | |
1120 | (let ((obj (caadr source))) | |
1121 | ;; smart closure compilation | |
1122 | (local-eval | |
1123 | `(lambda (,obj) (,assert-bound ,(caddr source) ,obj)) | |
1124 | (procedure-environment proc))) | |
1125 | (lambda (o) (assert-bound (proc o) o))))) | |
1126 | ||
1127 | (define n-standard-accessor-methods 10) | |
1128 | ||
1129 | (define bound-check-get-methods (make-vector n-standard-accessor-methods #f)) | |
1130 | (define standard-get-methods (make-vector n-standard-accessor-methods #f)) | |
1131 | (define standard-set-methods (make-vector n-standard-accessor-methods #f)) | |
1132 | ||
1133 | (define (standard-accessor-method make methods) | |
1134 | (lambda (index) | |
1135 | (cond ((>= index n-standard-accessor-methods) (make index)) | |
1136 | ((vector-ref methods index)) | |
1137 | (else (let ((m (make index))) | |
1138 | (vector-set! methods index m) | |
1139 | m))))) | |
1140 | ||
1141 | (define (make-bound-check-get index) | |
1142 | (local-eval `(lambda (o) (@assert-bound-ref o ,index)) (the-environment))) | |
1143 | ||
1144 | (define (make-get index) | |
1145 | (local-eval `(lambda (o) (@slot-ref o ,index)) (the-environment))) | |
1146 | ||
1147 | (define (make-set index) | |
1148 | (local-eval `(lambda (o v) (@slot-set! o ,index v)) (the-environment))) | |
1149 | ||
1150 | (define bound-check-get | |
1151 | (standard-accessor-method make-bound-check-get bound-check-get-methods)) | |
1152 | (define standard-get (standard-accessor-method make-get standard-get-methods)) | |
1153 | (define standard-set (standard-accessor-method make-set standard-set-methods)) | |
1154 | ||
1155 | ;;; compute-getters-n-setters | |
1156 | ;;; | |
1157 | (define (compute-getters-n-setters class slots env) | |
1158 | ||
1159 | (define (compute-slot-init-function s) | |
1160 | (or (slot-definition-init-thunk s) | |
1161 | (let ((init (slot-definition-init-value s))) | |
1162 | (and (not (unbound? init)) | |
1163 | (lambda () init))))) | |
1164 | ||
1165 | (define (verify-accessors slot l) | |
1166 | (if (pair? l) | |
1167 | (let ((get (car l)) | |
1168 | (set (cadr l))) | |
1169 | (if (not (and (closure? get) | |
1170 | (= (car (procedure-property get 'arity)) 1))) | |
1171 | (goops-error "Bad getter closure for slot `~S' in ~S: ~S" | |
1172 | slot class get)) | |
1173 | (if (not (and (closure? set) | |
1174 | (= (car (procedure-property set 'arity)) 2))) | |
1175 | (goops-error "Bad setter closure for slot `~S' in ~S: ~S" | |
1176 | slot class set))))) | |
1177 | ||
1178 | (map (lambda (s) | |
1179 | (let* ((g-n-s (compute-get-n-set class s)) | |
1180 | (name (slot-definition-name s))) | |
1181 | ; For each slot we have '(name init-function getter setter) | |
1182 | ; If slot, we have the simplest form '(name init-function . index) | |
1183 | (verify-accessors name g-n-s) | |
1184 | (cons name | |
1185 | (cons (compute-slot-init-function s) | |
1186 | g-n-s)))) | |
1187 | slots)) | |
1188 | ||
1189 | ;;; compute-cpl | |
1190 | ;;; | |
1191 | ;;; Correct behaviour: | |
1192 | ;;; | |
1193 | ;;; (define-class food ()) | |
1194 | ;;; (define-class fruit (food)) | |
1195 | ;;; (define-class spice (food)) | |
1196 | ;;; (define-class apple (fruit)) | |
1197 | ;;; (define-class cinnamon (spice)) | |
1198 | ;;; (define-class pie (apple cinnamon)) | |
1199 | ;;; => cpl (pie) = pie apple fruit cinnamon spice food object top | |
1200 | ;;; | |
1201 | ;;; (define-class d ()) | |
1202 | ;;; (define-class e ()) | |
1203 | ;;; (define-class f ()) | |
1204 | ;;; (define-class b (d e)) | |
1205 | ;;; (define-class c (e f)) | |
1206 | ;;; (define-class a (b c)) | |
1207 | ;;; => cpl (a) = a b d c e f object top | |
1208 | ;;; | |
1209 | ||
71d540f7 | 1210 | (define-method (compute-cpl (class <class>)) |
14f1d9fe MD |
1211 | (compute-std-cpl class class-direct-supers)) |
1212 | ||
1213 | ;; Support | |
1214 | ||
1215 | (define (only-non-null lst) | |
1216 | (filter (lambda (l) (not (null? l))) lst)) | |
1217 | ||
1218 | (define (compute-std-cpl c get-direct-supers) | |
1219 | (let ((c-direct-supers (get-direct-supers c))) | |
1220 | (merge-lists (list c) | |
1221 | (only-non-null (append (map class-precedence-list | |
1222 | c-direct-supers) | |
1223 | (list c-direct-supers)))))) | |
1224 | ||
1225 | (define (merge-lists reversed-partial-result inputs) | |
1226 | (cond | |
1227 | ((every null? inputs) | |
1228 | (reverse! reversed-partial-result)) | |
1229 | (else | |
1230 | (let* ((candidate (lambda (c) | |
1231 | (and (not (any (lambda (l) | |
1232 | (memq c (cdr l))) | |
1233 | inputs)) | |
1234 | c))) | |
1235 | (candidate-car (lambda (l) | |
1236 | (and (not (null? l)) | |
1237 | (candidate (car l))))) | |
1238 | (next (any candidate-car inputs))) | |
1239 | (if (not next) | |
1240 | (goops-error "merge-lists: Inconsistent precedence graph")) | |
1241 | (let ((remove-next (lambda (l) | |
1242 | (if (eq? (car l) next) | |
1243 | (cdr l) | |
1244 | l)))) | |
1245 | (merge-lists (cons next reversed-partial-result) | |
1246 | (only-non-null (map remove-next inputs)))))))) | |
1247 | ||
1248 | ;; Modified from TinyClos: | |
1249 | ;; | |
1250 | ;; A simple topological sort. | |
1251 | ;; | |
1252 | ;; It's in this file so that both TinyClos and Objects can use it. | |
1253 | ;; | |
1254 | ;; This is a fairly modified version of code I originally got from Anurag | |
1255 | ;; Mendhekar <anurag@moose.cs.indiana.edu>. | |
1256 | ;; | |
1257 | ||
1258 | (define (compute-clos-cpl c get-direct-supers) | |
1259 | (top-sort ((build-transitive-closure get-direct-supers) c) | |
1260 | ((build-constraints get-direct-supers) c) | |
1261 | (std-tie-breaker get-direct-supers))) | |
1262 | ||
1263 | ||
1264 | (define (top-sort elements constraints tie-breaker) | |
1265 | (let loop ((elements elements) | |
1266 | (constraints constraints) | |
1267 | (result '())) | |
1268 | (if (null? elements) | |
1269 | result | |
1270 | (let ((can-go-in-now | |
1271 | (filter | |
1272 | (lambda (x) | |
1273 | (every (lambda (constraint) | |
1274 | (or (not (eq? (cadr constraint) x)) | |
1275 | (memq (car constraint) result))) | |
1276 | constraints)) | |
1277 | elements))) | |
1278 | (if (null? can-go-in-now) | |
1279 | (goops-error "top-sort: Invalid constraints") | |
1280 | (let ((choice (if (null? (cdr can-go-in-now)) | |
1281 | (car can-go-in-now) | |
1282 | (tie-breaker result | |
1283 | can-go-in-now)))) | |
1284 | (loop | |
1285 | (filter (lambda (x) (not (eq? x choice))) | |
1286 | elements) | |
1287 | constraints | |
1288 | (append result (list choice))))))))) | |
1289 | ||
1290 | (define (std-tie-breaker get-supers) | |
1291 | (lambda (partial-cpl min-elts) | |
1292 | (let loop ((pcpl (reverse partial-cpl))) | |
1293 | (let ((current-elt (car pcpl))) | |
1294 | (let ((ds-of-ce (get-supers current-elt))) | |
1295 | (let ((common (filter (lambda (x) | |
1296 | (memq x ds-of-ce)) | |
1297 | min-elts))) | |
1298 | (if (null? common) | |
1299 | (if (null? (cdr pcpl)) | |
1300 | (goops-error "std-tie-breaker: Nothing valid") | |
1301 | (loop (cdr pcpl))) | |
1302 | (car common)))))))) | |
1303 | ||
1304 | ||
1305 | (define (build-transitive-closure get-follow-ons) | |
1306 | (lambda (x) | |
1307 | (let track ((result '()) | |
1308 | (pending (list x))) | |
1309 | (if (null? pending) | |
1310 | result | |
1311 | (let ((next (car pending))) | |
1312 | (if (memq next result) | |
1313 | (track result (cdr pending)) | |
1314 | (track (cons next result) | |
1315 | (append (get-follow-ons next) | |
1316 | (cdr pending))))))))) | |
1317 | ||
1318 | (define (build-constraints get-follow-ons) | |
1319 | (lambda (x) | |
1320 | (let loop ((elements ((build-transitive-closure get-follow-ons) x)) | |
1321 | (this-one '()) | |
1322 | (result '())) | |
1323 | (if (or (null? this-one) (null? (cdr this-one))) | |
1324 | (if (null? elements) | |
1325 | result | |
1326 | (loop (cdr elements) | |
1327 | (cons (car elements) | |
1328 | (get-follow-ons (car elements))) | |
1329 | result)) | |
1330 | (loop elements | |
1331 | (cdr this-one) | |
1332 | (cons (list (car this-one) (cadr this-one)) | |
1333 | result)))))) | |
1334 | ||
1335 | ;;; compute-get-n-set | |
1336 | ;;; | |
71d540f7 | 1337 | (define-method (compute-get-n-set (class <class>) s) |
14f1d9fe MD |
1338 | (case (slot-definition-allocation s) |
1339 | ((#:instance) ;; Instance slot | |
1340 | ;; get-n-set is just its offset | |
1341 | (let ((already-allocated (slot-ref class 'nfields))) | |
1342 | (slot-set! class 'nfields (+ already-allocated 1)) | |
1343 | already-allocated)) | |
1344 | ||
1345 | ((#:class) ;; Class slot | |
1346 | ;; Class-slots accessors are implemented as 2 closures around | |
1347 | ;; a Scheme variable. As instance slots, class slots must be | |
1348 | ;; unbound at init time. | |
1349 | (let ((name (slot-definition-name s))) | |
1350 | (if (memq name (map slot-definition-name (class-direct-slots class))) | |
1351 | ;; This slot is direct; create a new shared variable | |
1352 | (make-closure-variable class) | |
1353 | ;; Slot is inherited. Find its definition in superclass | |
1354 | (let loop ((l (cdr (class-precedence-list class)))) | |
1355 | (let ((r (assoc name (slot-ref (car l) 'getters-n-setters)))) | |
1356 | (if r | |
1357 | (cddr r) | |
1358 | (loop (cdr l)))))))) | |
1359 | ||
1360 | ((#:each-subclass) ;; slot shared by instances of direct subclass. | |
1361 | ;; (Thomas Buerger, April 1998) | |
1362 | (make-closure-variable class)) | |
1363 | ||
1364 | ((#:virtual) ;; No allocation | |
1365 | ;; slot-ref and slot-set! function must be given by the user | |
1366 | (let ((get (get-keyword #:slot-ref (slot-definition-options s) #f)) | |
1367 | (set (get-keyword #:slot-set! (slot-definition-options s) #f)) | |
1368 | (env (class-environment class))) | |
1369 | (if (not (and get set)) | |
1370 | (goops-error "You must supply a :slot-ref and a :slot-set! in ~S" | |
1371 | s)) | |
1372 | (list get set))) | |
1373 | (else (next-method)))) | |
1374 | ||
1375 | (define (make-closure-variable class) | |
1376 | (let ((shared-variable (make-unbound))) | |
1377 | (list (lambda (o) shared-variable) | |
1378 | (lambda (o v) (set! shared-variable v))))) | |
1379 | ||
71d540f7 | 1380 | (define-method (compute-get-n-set (o <object>) s) |
14f1d9fe MD |
1381 | (goops-error "Allocation \"~S\" is unknown" (slot-definition-allocation s))) |
1382 | ||
71d540f7 | 1383 | (define-method (compute-slots (class <class>)) |
14f1d9fe MD |
1384 | (%compute-slots class)) |
1385 | ||
1386 | ;;; | |
1387 | ;;; {Initialize} | |
1388 | ;;; | |
1389 | ||
71d540f7 | 1390 | (define-method (initialize (object <object>) initargs) |
14f1d9fe MD |
1391 | (%initialize-object object initargs)) |
1392 | ||
71d540f7 | 1393 | (define-method (initialize (class <class>) initargs) |
14f1d9fe MD |
1394 | (next-method) |
1395 | (let ((dslots (get-keyword #:slots initargs '())) | |
1396 | (supers (get-keyword #:dsupers initargs '())) | |
1397 | (env (get-keyword #:environment initargs (top-level-env)))) | |
1398 | ||
1399 | (slot-set! class 'name (get-keyword #:name initargs '???)) | |
1400 | (slot-set! class 'direct-supers supers) | |
1401 | (slot-set! class 'direct-slots dslots) | |
1402 | (slot-set! class 'direct-subclasses '()) | |
1403 | (slot-set! class 'direct-methods '()) | |
1404 | (slot-set! class 'cpl (compute-cpl class)) | |
1405 | (slot-set! class 'redefined #f) | |
1406 | (slot-set! class 'environment env) | |
1407 | (let ((slots (compute-slots class))) | |
1408 | (slot-set! class 'slots slots) | |
1409 | (slot-set! class 'nfields 0) | |
1410 | (slot-set! class 'getters-n-setters (compute-getters-n-setters class | |
1411 | slots | |
1412 | env)) | |
1413 | ;; Build getters - setters - accessors | |
1414 | (compute-slot-accessors class slots env)) | |
1415 | ||
1416 | ;; Update the "direct-subclasses" of each inherited classes | |
1417 | (for-each (lambda (x) | |
1418 | (slot-set! x | |
1419 | 'direct-subclasses | |
1420 | (cons class (slot-ref x 'direct-subclasses)))) | |
1421 | supers) | |
1422 | ||
1423 | ;; Support for the underlying structs: | |
1424 | ||
1425 | ;; Inherit class flags (invisible on scheme level) from supers | |
1426 | (%inherit-magic! class supers) | |
1427 | ||
1428 | ;; Set the layout slot | |
1429 | (%prep-layout! class))) | |
1430 | ||
14f1d9fe MD |
1431 | (define (initialize-object-procedure object initargs) |
1432 | (let ((proc (get-keyword #:procedure initargs #f))) | |
1433 | (cond ((not proc)) | |
1434 | ((pair? proc) | |
1435 | (apply set-object-procedure! object proc)) | |
a524a03f | 1436 | ((valid-object-procedure? proc) |
14f1d9fe MD |
1437 | (set-object-procedure! object proc)) |
1438 | (else | |
1439 | (set-object-procedure! object | |
1440 | (lambda args (apply proc args))))))) | |
1441 | ||
71d540f7 | 1442 | (define-method (initialize (class <operator-class>) initargs) |
14f1d9fe MD |
1443 | (next-method) |
1444 | (initialize-object-procedure class initargs)) | |
1445 | ||
71d540f7 | 1446 | (define-method (initialize (owsc <operator-with-setter-class>) initargs) |
14f1d9fe MD |
1447 | (next-method) |
1448 | (%set-object-setter! owsc (get-keyword #:setter initargs #f))) | |
1449 | ||
71d540f7 | 1450 | (define-method (initialize (entity <entity>) initargs) |
14f1d9fe MD |
1451 | (next-method) |
1452 | (initialize-object-procedure entity initargs)) | |
1453 | ||
71d540f7 | 1454 | (define-method (initialize (ews <entity-with-setter>) initargs) |
14f1d9fe MD |
1455 | (next-method) |
1456 | (%set-object-setter! ews (get-keyword #:setter initargs #f))) | |
1457 | ||
71d540f7 | 1458 | (define-method (initialize (generic <generic>) initargs) |
14f1d9fe MD |
1459 | (let ((previous-definition (get-keyword #:default initargs #f)) |
1460 | (name (get-keyword #:name initargs #f))) | |
1461 | (next-method) | |
1462 | (slot-set! generic 'methods (if (is-a? previous-definition <procedure>) | |
1463 | (list (make <method> | |
1464 | #:specializers <top> | |
1465 | #:procedure | |
1466 | (lambda l | |
1467 | (apply previous-definition | |
1468 | l)))) | |
1469 | '())) | |
1470 | (if name | |
1471 | (set-procedure-property! generic 'name name)) | |
1472 | )) | |
1473 | ||
bbf8d523 MD |
1474 | (define-method (initialize (eg <extended-generic>) initargs) |
1475 | (next-method) | |
1476 | (slot-set! eg 'extends (get-keyword #:extends initargs '()))) | |
1477 | ||
b432fb4b MD |
1478 | (define dummy-procedure (lambda args *unspecified*)) |
1479 | ||
71d540f7 | 1480 | (define-method (initialize (method <method>) initargs) |
14f1d9fe MD |
1481 | (next-method) |
1482 | (slot-set! method 'generic-function (get-keyword #:generic-function initargs #f)) | |
1483 | (slot-set! method 'specializers (get-keyword #:specializers initargs '())) | |
b432fb4b MD |
1484 | (slot-set! method 'procedure |
1485 | (get-keyword #:procedure initargs dummy-procedure)) | |
14f1d9fe MD |
1486 | (slot-set! method 'code-table '())) |
1487 | ||
71d540f7 | 1488 | (define-method (initialize (obj <foreign-object>) initargs)) |
14f1d9fe MD |
1489 | |
1490 | ;;; | |
1491 | ;;; {Change-class} | |
1492 | ;;; | |
1493 | ||
1494 | (define (change-object-class old-instance old-class new-class) | |
cc6c7fee | 1495 | (let ((new-instance (allocate-instance new-class '()))) |
14f1d9fe MD |
1496 | ;; Initalize the slot of the new instance |
1497 | (for-each (lambda (slot) | |
1498 | (if (and (slot-exists-using-class? old-class old-instance slot) | |
1499 | (eq? (slot-definition-allocation | |
1500 | (class-slot-definition old-class slot)) | |
1501 | #:instance) | |
1502 | (slot-bound-using-class? old-class old-instance slot)) | |
1503 | ;; Slot was present and allocated in old instance; copy it | |
1504 | (slot-set-using-class! | |
1505 | new-class | |
1506 | new-instance | |
1507 | slot | |
1508 | (slot-ref-using-class old-class old-instance slot)) | |
1509 | ;; slot was absent; initialize it with its default value | |
1510 | (let ((init (slot-init-function new-class slot))) | |
1511 | (if init | |
1512 | (slot-set-using-class! | |
1513 | new-class | |
1514 | new-instance | |
1515 | slot | |
1516 | (apply init '())))))) | |
1517 | (map slot-definition-name (class-slots new-class))) | |
1518 | ;; Exchange old and new instance in place to keep pointers valid | |
1519 | (%modify-instance old-instance new-instance) | |
1520 | ;; Allow class specific updates of instances (which now are swapped) | |
1521 | (update-instance-for-different-class new-instance old-instance) | |
1522 | old-instance)) | |
1523 | ||
1524 | ||
71d540f7 | 1525 | (define-method (update-instance-for-different-class (old-instance <object>) |
14f1d9fe MD |
1526 | (new-instance |
1527 | <object>)) | |
1528 | ;;not really important what we do, we just need a default method | |
1529 | new-instance) | |
1530 | ||
71d540f7 | 1531 | (define-method (change-class (old-instance <object>) (new-class <class>)) |
14f1d9fe MD |
1532 | (change-object-class old-instance (class-of old-instance) new-class)) |
1533 | ||
1534 | ;;; | |
1535 | ;;; {make} | |
1536 | ;;; | |
1537 | ;;; A new definition which overwrites the previous one which was built-in | |
1538 | ;;; | |
1539 | ||
71d540f7 | 1540 | (define-method (allocate-instance (class <class>) initargs) |
14f1d9fe MD |
1541 | (%allocate-instance class initargs)) |
1542 | ||
71d540f7 | 1543 | (define-method (make-instance (class <class>) . initargs) |
14f1d9fe MD |
1544 | (let ((instance (allocate-instance class initargs))) |
1545 | (initialize instance initargs) | |
1546 | instance)) | |
1547 | ||
1548 | (define make make-instance) | |
1549 | ||
1550 | ;;; | |
1551 | ;;; {apply-generic} | |
1552 | ;;; | |
1553 | ;;; Protocol for calling standard generic functions. This protocol is | |
1554 | ;;; not used for real <generic> functions (in this case we use a | |
1555 | ;;; completely C hard-coded protocol). Apply-generic is used by | |
1556 | ;;; goops for calls to subclasses of <generic> and <generic-with-setter>. | |
1557 | ;;; The code below is similar to the first MOP described in AMOP. In | |
1558 | ;;; particular, it doesn't used the currified approach to gf | |
1559 | ;;; call. There are 2 reasons for that: | |
1560 | ;;; - the protocol below is exposed to mimic completely the one written in C | |
1561 | ;;; - the currified protocol would be imho inefficient in C. | |
1562 | ;;; | |
1563 | ||
71d540f7 | 1564 | (define-method (apply-generic (gf <generic>) args) |
14f1d9fe MD |
1565 | (if (null? (slot-ref gf 'methods)) |
1566 | (no-method gf args)) | |
1567 | (let ((methods (compute-applicable-methods gf args))) | |
1568 | (if methods | |
1569 | (apply-methods gf (sort-applicable-methods gf methods args) args) | |
1570 | (no-applicable-method gf args)))) | |
1571 | ||
1572 | ;; compute-applicable-methods is bound to %compute-applicable-methods. | |
1573 | ;; *fixme* use let | |
1574 | (define %%compute-applicable-methods | |
1575 | (make <generic> #:name 'compute-applicable-methods)) | |
1576 | ||
71d540f7 | 1577 | (define-method (%%compute-applicable-methods (gf <generic>) args) |
14f1d9fe MD |
1578 | (%compute-applicable-methods gf args)) |
1579 | ||
1580 | (set! compute-applicable-methods %%compute-applicable-methods) | |
1581 | ||
71d540f7 | 1582 | (define-method (sort-applicable-methods (gf <generic>) methods args) |
14f1d9fe MD |
1583 | (let ((targs (map class-of args))) |
1584 | (sort methods (lambda (m1 m2) (method-more-specific? m1 m2 targs))))) | |
1585 | ||
71d540f7 | 1586 | (define-method (method-more-specific? (m1 <method>) (m2 <method>) targs) |
14f1d9fe MD |
1587 | (%method-more-specific? m1 m2 targs)) |
1588 | ||
71d540f7 | 1589 | (define-method (apply-method (gf <generic>) methods build-next args) |
14f1d9fe MD |
1590 | (apply (method-procedure (car methods)) |
1591 | (build-next (cdr methods) args) | |
1592 | args)) | |
1593 | ||
71d540f7 | 1594 | (define-method (apply-methods (gf <generic>) (l <list>) args) |
14f1d9fe MD |
1595 | (letrec ((next (lambda (procs args) |
1596 | (lambda new-args | |
1597 | (let ((a (if (null? new-args) args new-args))) | |
1598 | (if (null? procs) | |
1599 | (no-next-method gf a) | |
1600 | (apply-method gf procs next a))))))) | |
1601 | (apply-method gf l next args))) | |
1602 | ||
1603 | ;; We don't want the following procedure to turn up in backtraces: | |
1604 | (for-each (lambda (proc) | |
1605 | (set-procedure-property! proc 'system-procedure #t)) | |
1606 | (list slot-unbound | |
1607 | slot-missing | |
1608 | no-next-method | |
1609 | no-applicable-method | |
1610 | no-method | |
1611 | )) | |
1612 | ||
1613 | ;;; | |
1614 | ;;; {<composite-metaclass> and <active-metaclass>} | |
1615 | ;;; | |
1616 | ||
1617 | ;(autoload "active-slot" <active-metaclass>) | |
1618 | ;(autoload "composite-slot" <composite-metaclass>) | |
1619 | ;(export <composite-metaclass> <active-metaclass>) | |
1620 | ||
1621 | ;;; | |
1622 | ;;; {Tools} | |
1623 | ;;; | |
1624 | ||
1625 | ;; list2set | |
1626 | ;; | |
1627 | ;; duplicate the standard list->set function but using eq instead of | |
1628 | ;; eqv which really sucks a lot, uselessly here | |
1629 | ;; | |
1630 | (define (list2set l) | |
1631 | (let loop ((l l) | |
1632 | (res '())) | |
1633 | (cond | |
1634 | ((null? l) res) | |
1635 | ((memq (car l) res) (loop (cdr l) res)) | |
1636 | (else (loop (cdr l) (cons (car l) res)))))) | |
1637 | ||
1638 | (define (class-subclasses c) | |
1639 | (letrec ((allsubs (lambda (c) | |
1640 | (cons c (mapappend allsubs | |
1641 | (class-direct-subclasses c)))))) | |
1642 | (list2set (cdr (allsubs c))))) | |
1643 | ||
1644 | (define (class-methods c) | |
1645 | (list2set (mapappend class-direct-methods | |
1646 | (cons c (class-subclasses c))))) | |
1647 | ||
1648 | ;;; | |
1649 | ;;; {Final initialization} | |
1650 | ;;; | |
1651 | ||
1652 | ;; Tell C code that the main bulk of Goops has been loaded | |
1653 | (%goops-loaded) |