Commit | Line | Data |
---|---|---|
6be07c52 TTN |
1 | ;;; srfi-1.scm --- List Library |
2 | ||
1b09b607 | 3 | ;; Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc. |
6be07c52 | 4 | ;; |
73be1d9e MV |
5 | ;; This library is free software; you can redistribute it and/or |
6 | ;; modify it under the terms of the GNU Lesser General Public | |
7 | ;; License as published by the Free Software Foundation; either | |
8 | ;; version 2.1 of the License, or (at your option) any later version. | |
9 | ;; | |
10 | ;; This library is distributed in the hope that it will be useful, | |
6be07c52 TTN |
11 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
73be1d9e MV |
13 | ;; Lesser General Public License for more details. |
14 | ;; | |
15 | ;; You should have received a copy of the GNU Lesser General Public | |
16 | ;; License along with this library; if not, write to the Free Software | |
92205699 | 17 | ;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
e9680547 MG |
18 | |
19 | ;;; Author: Martin Grabmueller <mgrabmue@cs.tu-berlin.de> | |
20 | ;;; Date: 2001-06-06 | |
21 | ||
22 | ;;; Commentary: | |
23 | ||
6be07c52 TTN |
24 | ;; This is an implementation of SRFI-1 (List Library). |
25 | ;; | |
26 | ;; All procedures defined in SRFI-1, which are not already defined in | |
27 | ;; the Guile core library, are exported. The procedures in this | |
28 | ;; implementation work, but they have not been tuned for speed or | |
29 | ;; memory usage. | |
30 | ;; | |
31 | ;; This module is fully documented in the Guile Reference Manual. | |
e9680547 MG |
32 | |
33 | ;;; Code: | |
34 | ||
35 | (define-module (srfi srfi-1) | |
f595ccfe | 36 | :export ( |
e9680547 MG |
37 | ;;; Constructors |
38 | ;; cons <= in the core | |
39 | ;; list <= in the core | |
40 | xcons | |
41 | ;; cons* <= in the core | |
42 | ;; make-list <= in the core | |
43 | list-tabulate | |
d61261f0 | 44 | list-copy |
e9680547 | 45 | circular-list |
f595ccfe | 46 | ;; iota ; Extended. |
e9680547 MG |
47 | |
48 | ;;; Predicates | |
49 | proper-list? | |
50 | circular-list? | |
51 | dotted-list? | |
52 | ;; pair? <= in the core | |
53 | ;; null? <= in the core | |
54 | null-list? | |
55 | not-pair? | |
56 | list= | |
57 | ||
58 | ;;; Selectors | |
59 | ;; car <= in the core | |
60 | ;; cdr <= in the core | |
61 | ;; caar <= in the core | |
62 | ;; cadr <= in the core | |
63 | ;; cdar <= in the core | |
2a326497 | 64 | ;; cddr <= in the core |
e9680547 MG |
65 | ;; caaar <= in the core |
66 | ;; caadr <= in the core | |
67 | ;; cadar <= in the core | |
68 | ;; caddr <= in the core | |
69 | ;; cdaar <= in the core | |
70 | ;; cdadr <= in the core | |
71 | ;; cddar <= in the core | |
72 | ;; cdddr <= in the core | |
73 | ;; caaaar <= in the core | |
74 | ;; caaadr <= in the core | |
75 | ;; caadar <= in the core | |
76 | ;; caaddr <= in the core | |
77 | ;; cadaar <= in the core | |
78 | ;; cadadr <= in the core | |
79 | ;; caddar <= in the core | |
80 | ;; cadddr <= in the core | |
81 | ;; cdaaar <= in the core | |
82 | ;; cdaadr <= in the core | |
83 | ;; cdadar <= in the core | |
84 | ;; cdaddr <= in the core | |
85 | ;; cddaar <= in the core | |
86 | ;; cddadr <= in the core | |
87 | ;; cdddar <= in the core | |
88 | ;; cddddr <= in the core | |
89 | ;; list-ref <= in the core | |
90 | first | |
91 | second | |
92 | third | |
93 | fourth | |
94 | fifth | |
95 | sixth | |
96 | seventh | |
97 | eighth | |
98 | ninth | |
99 | tenth | |
100 | car+cdr | |
101 | take | |
102 | drop | |
103 | take-right | |
104 | drop-right | |
105 | take! | |
106 | drop-right! | |
107 | split-at | |
108 | split-at! | |
109 | last | |
110 | ;; last-pair <= in the core | |
111 | ||
112 | ;;; Miscelleneous: length, append, concatenate, reverse, zip & count | |
113 | ;; length <= in the core | |
114 | length+ | |
115 | ;; append <= in the core | |
116 | ;; append! <= in the core | |
117 | concatenate | |
118 | concatenate! | |
119 | ;; reverse <= in the core | |
120 | ;; reverse! <= in the core | |
121 | append-reverse | |
122 | append-reverse! | |
123 | zip | |
124 | unzip1 | |
125 | unzip2 | |
126 | unzip3 | |
127 | unzip4 | |
128 | unzip5 | |
129 | count | |
130 | ||
131 | ;;; Fold, unfold & map | |
132 | fold | |
133 | fold-right | |
134 | pair-fold | |
135 | pair-fold-right | |
136 | reduce | |
137 | reduce-right | |
138 | unfold | |
139 | unfold-right | |
f595ccfe MD |
140 | ;; map ; Extended. |
141 | ;; for-each ; Extended. | |
e9680547 MG |
142 | append-map |
143 | append-map! | |
144 | map! | |
f595ccfe | 145 | ;; map-in-order ; Extended. |
e9680547 MG |
146 | pair-for-each |
147 | filter-map | |
148 | ||
149 | ;;; Filtering & partitioning | |
c614a00b | 150 | ;; filter <= in the core |
e9680547 MG |
151 | partition |
152 | remove | |
c614a00b | 153 | ;; filter! <= in the core |
e9680547 MG |
154 | partition! |
155 | remove! | |
156 | ||
157 | ;;; Searching | |
158 | find | |
159 | find-tail | |
160 | take-while | |
161 | take-while! | |
162 | drop-while | |
163 | span | |
164 | span! | |
165 | break | |
166 | break! | |
167 | any | |
168 | every | |
f595ccfe MD |
169 | ;; list-index ; Extended. |
170 | ;; member ; Extended. | |
e9680547 MG |
171 | ;; memq <= in the core |
172 | ;; memv <= in the core | |
173 | ||
174 | ;;; Deletion | |
f595ccfe MD |
175 | ;; delete ; Extended. |
176 | ;; delete! ; Extended. | |
e9680547 MG |
177 | delete-duplicates |
178 | delete-duplicates! | |
179 | ||
180 | ;;; Association lists | |
f595ccfe | 181 | ;; assoc ; Extended. |
e9680547 MG |
182 | ;; assq <= in the core |
183 | ;; assv <= in the core | |
184 | alist-cons | |
185 | alist-copy | |
186 | alist-delete | |
187 | alist-delete! | |
188 | ||
189 | ;;; Set operations on lists | |
190 | lset<= | |
191 | lset= | |
192 | lset-adjoin | |
193 | lset-union | |
194 | lset-intersection | |
195 | lset-difference | |
196 | lset-xor | |
197 | lset-diff+intersection | |
198 | lset-union! | |
199 | lset-intersection! | |
200 | lset-difference! | |
201 | lset-xor! | |
202 | lset-diff+intersection! | |
203 | ||
204 | ;;; Primitive side-effects | |
205 | ;; set-car! <= in the core | |
206 | ;; set-cdr! <= in the core | |
207 | ) | |
d61261f0 | 208 | :re-export (cons list cons* make-list pair? null? |
b8b0abf0 MD |
209 | car cdr caar cadr cdar cddr |
210 | caaar caadr cadar caddr cdaar cdadr cddar cdddr | |
211 | caaaar caaadr caadar caaddr cadaar cadadr caddar cadddr | |
212 | cdaaar cdaadr cdadar cdaddr cddaar cddadr cdddar cddddr | |
213 | list-ref last-pair length append append! reverse reverse! | |
214 | filter filter! memq memv assq assv set-car! set-cdr!) | |
d61261f0 | 215 | :replace (iota map for-each map-in-order list-copy list-index member |
f595ccfe MD |
216 | delete delete! assoc) |
217 | ) | |
e9680547 MG |
218 | |
219 | (cond-expand-provide (current-module) '(srfi-1)) | |
220 | ||
ee6aac97 MD |
221 | ;; Load the compiled primitives from the shared library. |
222 | ;; | |
0f24e75b | 223 | (load-extension "libguile-srfi-srfi-1-v-4" "scm_init_srfi_1") |
ee6aac97 MD |
224 | |
225 | ||
e9680547 MG |
226 | ;;; Constructors |
227 | ||
5753f02f GH |
228 | ;; internal helper, similar to (scsh utilities) check-arg. |
229 | (define (check-arg-type pred arg caller) | |
230 | (if (pred arg) | |
231 | arg | |
232 | (scm-error 'wrong-type-arg caller | |
233 | "Wrong type argument: ~S" (list arg) '()))) | |
234 | ||
235 | ;; the srfi spec doesn't seem to forbid inexact integers. | |
236 | (define (non-negative-integer? x) (and (integer? x) (>= x 0))) | |
237 | ||
e556f8c3 | 238 | |
e9680547 | 239 | |
2d411b05 KR |
240 | (define (circular-list elt1 . elts) |
241 | (set! elts (cons elt1 elts)) | |
242 | (set-cdr! (last-pair elts) elts) | |
243 | elts) | |
e9680547 MG |
244 | |
245 | (define (iota count . rest) | |
5753f02f | 246 | (check-arg-type non-negative-integer? count "iota") |
e9680547 MG |
247 | (let ((start (if (pair? rest) (car rest) 0)) |
248 | (step (if (and (pair? rest) (pair? (cdr rest))) (cadr rest) 1))) | |
249 | (let lp ((n 0) (acc '())) | |
250 | (if (= n count) | |
251 | (reverse! acc) | |
252 | (lp (+ n 1) (cons (+ start (* n step)) acc)))))) | |
253 | ||
254 | ;;; Predicates | |
255 | ||
256 | (define (proper-list? x) | |
257 | (list? x)) | |
258 | ||
259 | (define (circular-list? x) | |
260 | (if (not-pair? x) | |
261 | #f | |
262 | (let lp ((hare (cdr x)) (tortoise x)) | |
263 | (if (not-pair? hare) | |
264 | #f | |
265 | (let ((hare (cdr hare))) | |
266 | (if (not-pair? hare) | |
267 | #f | |
268 | (if (eq? hare tortoise) | |
269 | #t | |
270 | (lp (cdr hare) (cdr tortoise))))))))) | |
271 | ||
272 | (define (dotted-list? x) | |
273 | (cond | |
274 | ((null? x) #f) | |
275 | ((not-pair? x) #t) | |
276 | (else | |
277 | (let lp ((hare (cdr x)) (tortoise x)) | |
278 | (cond | |
279 | ((null? hare) #f) | |
280 | ((not-pair? hare) #t) | |
281 | (else | |
282 | (let ((hare (cdr hare))) | |
513a3bd7 | 283 | (cond |
e9680547 MG |
284 | ((null? hare) #f) |
285 | ((not-pair? hare) #t) | |
286 | ((eq? hare tortoise) #f) | |
287 | (else | |
288 | (lp (cdr hare) (cdr tortoise))))))))))) | |
289 | ||
290 | (define (null-list? x) | |
291 | (cond | |
513a3bd7 | 292 | ((proper-list? x) |
e9680547 MG |
293 | (null? x)) |
294 | ((circular-list? x) | |
295 | #f) | |
296 | (else | |
297 | (error "not a proper list in null-list?")))) | |
298 | ||
e9680547 MG |
299 | (define (list= elt= . rest) |
300 | (define (lists-equal a b) | |
301 | (let lp ((a a) (b b)) | |
302 | (cond ((null? a) | |
303 | (null? b)) | |
304 | ((null? b) | |
305 | #f) | |
306 | (else | |
307 | (and (elt= (car a) (car b)) | |
308 | (lp (cdr a) (cdr b))))))) | |
309 | (or (null? rest) | |
1bc8745f KR |
310 | (let lp ((lists rest)) |
311 | (or (null? (cdr lists)) | |
312 | (and (lists-equal (car lists) (cadr lists)) | |
313 | (lp (cdr lists))))))) | |
e9680547 MG |
314 | |
315 | ;;; Selectors | |
316 | ||
317 | (define first car) | |
318 | (define second cadr) | |
319 | (define third caddr) | |
320 | (define fourth cadddr) | |
e9680547 | 321 | |
4dd6bd84 KR |
322 | (define take list-head) |
323 | (define drop list-tail) | |
324 | ||
e9680547 MG |
325 | ;;; Miscelleneous: length, append, concatenate, reverse, zip & count |
326 | ||
e9680547 MG |
327 | (define (zip clist1 . rest) |
328 | (let lp ((l (cons clist1 rest)) (acc '())) | |
329 | (if (any null? l) | |
330 | (reverse! acc) | |
cef248dd | 331 | (lp (map1 cdr l) (cons (map1 car l) acc))))) |
513a3bd7 | 332 | |
e9680547 MG |
333 | |
334 | (define (unzip1 l) | |
cef248dd | 335 | (map1 first l)) |
e9680547 | 336 | (define (unzip2 l) |
cef248dd | 337 | (values (map1 first l) (map1 second l))) |
e9680547 | 338 | (define (unzip3 l) |
cef248dd | 339 | (values (map1 first l) (map1 second l) (map1 third l))) |
e9680547 | 340 | (define (unzip4 l) |
cef248dd | 341 | (values (map1 first l) (map1 second l) (map1 third l) (map1 fourth l))) |
e9680547 | 342 | (define (unzip5 l) |
cef248dd MG |
343 | (values (map1 first l) (map1 second l) (map1 third l) (map1 fourth l) |
344 | (map1 fifth l))) | |
e9680547 | 345 | |
e9680547 MG |
346 | ;;; Fold, unfold & map |
347 | ||
e9680547 MG |
348 | (define (fold-right kons knil clist1 . rest) |
349 | (if (null? rest) | |
350 | (let f ((list1 clist1)) | |
351 | (if (null? list1) | |
352 | knil | |
353 | (kons (car list1) (f (cdr list1))))) | |
354 | (let f ((lists (cons clist1 rest))) | |
355 | (if (any null? lists) | |
356 | knil | |
cef248dd | 357 | (apply kons (append! (map1 car lists) (list (f (map1 cdr lists))))))))) |
e9680547 MG |
358 | |
359 | (define (pair-fold kons knil clist1 . rest) | |
360 | (if (null? rest) | |
361 | (let f ((knil knil) (list1 clist1)) | |
362 | (if (null? list1) | |
363 | knil | |
364 | (let ((tail (cdr list1))) | |
365 | (f (kons list1 knil) tail)))) | |
366 | (let f ((knil knil) (lists (cons clist1 rest))) | |
367 | (if (any null? lists) | |
368 | knil | |
cef248dd | 369 | (let ((tails (map1 cdr lists))) |
563058ef | 370 | (f (apply kons (append! lists (list knil))) tails)))))) |
e9680547 MG |
371 | |
372 | ||
373 | (define (pair-fold-right kons knil clist1 . rest) | |
374 | (if (null? rest) | |
375 | (let f ((list1 clist1)) | |
376 | (if (null? list1) | |
377 | knil | |
378 | (kons list1 (f (cdr list1))))) | |
379 | (let f ((lists (cons clist1 rest))) | |
380 | (if (any null? lists) | |
381 | knil | |
cef248dd | 382 | (apply kons (append! lists (list (f (map1 cdr lists))))))))) |
e9680547 MG |
383 | |
384 | (define (unfold p f g seed . rest) | |
385 | (let ((tail-gen (if (pair? rest) | |
386 | (if (pair? (cdr rest)) | |
387 | (scm-error 'wrong-number-of-args | |
388 | "unfold" "too many arguments" '() '()) | |
389 | (car rest)) | |
390 | (lambda (x) '())))) | |
391 | (let uf ((seed seed)) | |
392 | (if (p seed) | |
393 | (tail-gen seed) | |
394 | (cons (f seed) | |
395 | (uf (g seed))))))) | |
396 | ||
397 | (define (unfold-right p f g seed . rest) | |
398 | (let ((tail (if (pair? rest) | |
399 | (if (pair? (cdr rest)) | |
400 | (scm-error 'wrong-number-of-args | |
401 | "unfold-right" "too many arguments" '() | |
402 | '()) | |
403 | (car rest)) | |
404 | '()))) | |
405 | (let uf ((seed seed) (lis tail)) | |
406 | (if (p seed) | |
407 | lis | |
408 | (uf (g seed) (cons (f seed) lis)))))) | |
409 | ||
cef248dd MG |
410 | |
411 | ;; Internal helper procedure. Map `f' over the single list `ls'. | |
412 | ;; | |
7692d26b | 413 | (define map1 map) |
cef248dd | 414 | |
e9680547 | 415 | (define (append-map f clist1 . rest) |
8b981efd | 416 | (concatenate (apply map f clist1 rest))) |
558d5c03 | 417 | |
e9680547 | 418 | (define (append-map! f clist1 . rest) |
8b981efd | 419 | (concatenate! (apply map f clist1 rest))) |
e9680547 | 420 | |
c6424115 KR |
421 | ;; OPTIMIZE-ME: Re-use cons cells of list1 |
422 | (define map! map) | |
e9680547 MG |
423 | |
424 | (define (pair-for-each f clist1 . rest) | |
425 | (if (null? rest) | |
426 | (let lp ((l clist1)) | |
427 | (if (null? l) | |
428 | (if #f #f) | |
429 | (begin | |
430 | (f l) | |
431 | (lp (cdr l))))) | |
432 | (let lp ((l (cons clist1 rest))) | |
433 | (if (any1 null? l) | |
434 | (if #f #f) | |
435 | (begin | |
436 | (apply f l) | |
cef248dd | 437 | (lp (map1 cdr l))))))) |
e9680547 | 438 | |
e9680547 MG |
439 | ;;; Searching |
440 | ||
e9680547 MG |
441 | (define (any pred ls . lists) |
442 | (if (null? lists) | |
443 | (any1 pred ls) | |
444 | (let lp ((lists (cons ls lists))) | |
445 | (cond ((any1 null? lists) | |
446 | #f) | |
cef248dd MG |
447 | ((any1 null? (map1 cdr lists)) |
448 | (apply pred (map1 car lists))) | |
e9680547 | 449 | (else |
cef248dd | 450 | (or (apply pred (map1 car lists)) (lp (map1 cdr lists)))))))) |
e9680547 MG |
451 | |
452 | (define (any1 pred ls) | |
453 | (let lp ((ls ls)) | |
454 | (cond ((null? ls) | |
455 | #f) | |
456 | ((null? (cdr ls)) | |
457 | (pred (car ls))) | |
458 | (else | |
459 | (or (pred (car ls)) (lp (cdr ls))))))) | |
460 | ||
461 | (define (every pred ls . lists) | |
462 | (if (null? lists) | |
463 | (every1 pred ls) | |
464 | (let lp ((lists (cons ls lists))) | |
465 | (cond ((any1 null? lists) | |
466 | #t) | |
cef248dd MG |
467 | ((any1 null? (map1 cdr lists)) |
468 | (apply pred (map1 car lists))) | |
e9680547 | 469 | (else |
cef248dd | 470 | (and (apply pred (map1 car lists)) (lp (map1 cdr lists)))))))) |
e9680547 MG |
471 | |
472 | (define (every1 pred ls) | |
473 | (let lp ((ls ls)) | |
474 | (cond ((null? ls) | |
475 | #t) | |
476 | ((null? (cdr ls)) | |
477 | (pred (car ls))) | |
478 | (else | |
479 | (and (pred (car ls)) (lp (cdr ls))))))) | |
480 | ||
e9680547 MG |
481 | ;;; Association lists |
482 | ||
0b5adedd | 483 | (define alist-cons acons) |
e9680547 | 484 | |
e9680547 MG |
485 | (define (alist-delete key alist . rest) |
486 | (let ((k= (if (pair? rest) (car rest) equal?))) | |
49ae1e25 | 487 | (let lp ((a alist) (rl '())) |
e9680547 | 488 | (if (null? a) |
49ae1e25 | 489 | (reverse! rl) |
41ab236c | 490 | (if (k= key (caar a)) |
49ae1e25 KR |
491 | (lp (cdr a) rl) |
492 | (lp (cdr a) (cons (car a) rl))))))) | |
e9680547 MG |
493 | |
494 | (define (alist-delete! key alist . rest) | |
495 | (let ((k= (if (pair? rest) (car rest) equal?))) | |
496 | (alist-delete key alist k=))) ; XXX:optimize | |
497 | ||
498 | ;;; Set operations on lists | |
499 | ||
500 | (define (lset<= = . rest) | |
501 | (if (null? rest) | |
502 | #t | |
503 | (let lp ((f (car rest)) (r (cdr rest))) | |
504 | (or (null? r) | |
505 | (and (every (lambda (el) (member el (car r) =)) f) | |
506 | (lp (car r) (cdr r))))))) | |
507 | ||
9d494a73 | 508 | (define (lset= = . rest) |
e9680547 MG |
509 | (if (null? rest) |
510 | #t | |
9d494a73 | 511 | (let lp ((f (car rest)) (r (cdr rest))) |
e9680547 MG |
512 | (or (null? r) |
513 | (and (every (lambda (el) (member el (car r) =)) f) | |
600af2ed | 514 | (every (lambda (el) (member el f (lambda (x y) (= y x)))) (car r)) |
e9680547 MG |
515 | (lp (car r) (cdr r))))))) |
516 | ||
e9680547 | 517 | (define (lset-union = . rest) |
62a87500 KR |
518 | (let ((acc '())) |
519 | (for-each (lambda (lst) | |
520 | (if (null? acc) | |
521 | (set! acc lst) | |
522 | (for-each (lambda (elem) | |
523 | (if (not (member elem acc | |
524 | (lambda (x y) (= y x)))) | |
525 | (set! acc (cons elem acc)))) | |
526 | lst))) | |
527 | rest) | |
528 | acc)) | |
e9680547 MG |
529 | |
530 | (define (lset-intersection = list1 . rest) | |
531 | (let lp ((l list1) (acc '())) | |
532 | (if (null? l) | |
533 | (reverse! acc) | |
534 | (if (every (lambda (ll) (member (car l) ll =)) rest) | |
535 | (lp (cdr l) (cons (car l) acc)) | |
536 | (lp (cdr l) acc))))) | |
537 | ||
538 | (define (lset-difference = list1 . rest) | |
539 | (if (null? rest) | |
540 | list1 | |
541 | (let lp ((l list1) (acc '())) | |
542 | (if (null? l) | |
543 | (reverse! acc) | |
544 | (if (any (lambda (ll) (member (car l) ll =)) rest) | |
545 | (lp (cdr l) acc) | |
546 | (lp (cdr l) (cons (car l) acc))))))) | |
547 | ||
548 | ;(define (fold kons knil list1 . rest) | |
549 | ||
550 | (define (lset-xor = . rest) | |
551 | (fold (lambda (lst res) | |
552 | (let lp ((l lst) (acc '())) | |
553 | (if (null? l) | |
554 | (let lp0 ((r res) (acc acc)) | |
555 | (if (null? r) | |
556 | (reverse! acc) | |
557 | (if (member (car r) lst =) | |
558 | (lp0 (cdr r) acc) | |
559 | (lp0 (cdr r) (cons (car r) acc))))) | |
560 | (if (member (car l) res =) | |
561 | (lp (cdr l) acc) | |
562 | (lp (cdr l) (cons (car l) acc)))))) | |
563 | '() | |
564 | rest)) | |
565 | ||
566 | (define (lset-diff+intersection = list1 . rest) | |
567 | (let lp ((l list1) (accd '()) (acci '())) | |
568 | (if (null? l) | |
569 | (values (reverse! accd) (reverse! acci)) | |
570 | (let ((appears (every (lambda (ll) (member (car l) ll =)) rest))) | |
571 | (if appears | |
572 | (lp (cdr l) accd (cons (car l) acci)) | |
573 | (lp (cdr l) (cons (car l) accd) acci)))))) | |
574 | ||
575 | ||
576 | (define (lset-union! = . rest) | |
577 | (apply lset-union = rest)) ; XXX:optimize | |
578 | ||
579 | (define (lset-intersection! = list1 . rest) | |
580 | (apply lset-intersection = list1 rest)) ; XXX:optimize | |
581 | ||
e9680547 MG |
582 | (define (lset-xor! = . rest) |
583 | (apply lset-xor = rest)) ; XXX:optimize | |
584 | ||
585 | (define (lset-diff+intersection! = list1 . rest) | |
586 | (apply lset-diff+intersection = list1 rest)) ; XXX:optimize | |
6be07c52 TTN |
587 | |
588 | ;;; srfi-1.scm ends here |