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0f2d19dd JB |
1 | ;;; installed-scm-file |
2 | ||
cf743aea | 3 | ;;;; Copyright (C) 1995,1996,1997,1998,1999,2000,2001,2002, 2003 Free Software Foundation, Inc. |
20edfbbd | 4 | ;;;; |
0f2d19dd JB |
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. | |
20edfbbd | 9 | ;;;; |
0f2d19dd JB |
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. | |
20edfbbd | 14 | ;;;; |
0f2d19dd JB |
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 | |
15328041 JB |
17 | ;;;; the Free Software Foundation, Inc., 59 Temple Place, Suite 330, |
18 | ;;;; Boston, MA 02111-1307 USA | |
20edfbbd | 19 | ;;;; |
a482f2cc MV |
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. | |
43 | ;;;; | |
0f2d19dd JB |
44 | \f |
45 | ||
20edfbbd TTN |
46 | ;;; Commentary: |
47 | ||
0f2d19dd JB |
48 | ;;; This file is the first thing loaded into Guile. It adds many mundane |
49 | ;;; definitions and a few that are interesting. | |
50 | ;;; | |
20edfbbd | 51 | ;;; The module system (hence the hierarchical namespace) are defined in this |
0f2d19dd JB |
52 | ;;; file. |
53 | ;;; | |
54 | ||
20edfbbd TTN |
55 | ;;; Code: |
56 | ||
0f2d19dd | 57 | \f |
9fb41cea MV |
58 | ;;; {Deprecation} |
59 | ;;; | |
60 | ||
61 | ;; We don't have macros here, but we do want to define | |
62 | ;; `begin-deprecated' early. | |
63 | ||
64 | (define begin-deprecated | |
65 | (procedure->memoizing-macro | |
66 | (lambda (exp env) | |
67 | (if (include-deprecated-features) | |
68 | `(begin ,@(cdr exp)) | |
69 | `#f)))) | |
70 | ||
71 | \f | |
21ed9efe MD |
72 | ;;; {Features} |
73 | ;; | |
74 | ||
75 | (define (provide sym) | |
76 | (if (not (memq sym *features*)) | |
77 | (set! *features* (cons sym *features*)))) | |
78 | ||
50706e94 JB |
79 | ;;; Return #t iff FEATURE is available to this Guile interpreter. |
80 | ;;; In SLIB, provided? also checks to see if the module is available. | |
81 | ;;; We should do that too, but don't. | |
82 | (define (provided? feature) | |
83 | (and (memq feature *features*) #t)) | |
84 | ||
8c494e99 | 85 | (begin-deprecated |
f4232aa6 MV |
86 | (define (feature? sym) |
87 | (issue-deprecation-warning | |
88 | "`feature?' is deprecated. Use `provided?' instead.") | |
89 | (provided? sym))) | |
52cfc69b | 90 | |
8641dd9e GB |
91 | ;;; let format alias simple-format until the more complete version is loaded |
92 | (define format simple-format) | |
93 | ||
21ed9efe | 94 | \f |
79451588 JB |
95 | ;;; {R4RS compliance} |
96 | ||
97 | (primitive-load-path "ice-9/r4rs.scm") | |
98 | ||
99 | \f | |
44cf1f0f | 100 | ;;; {Simple Debugging Tools} |
0f2d19dd JB |
101 | ;; |
102 | ||
103 | ||
104 | ;; peek takes any number of arguments, writes them to the | |
105 | ;; current ouput port, and returns the last argument. | |
106 | ;; It is handy to wrap around an expression to look at | |
107 | ;; a value each time is evaluated, e.g.: | |
108 | ;; | |
109 | ;; (+ 10 (troublesome-fn)) | |
110 | ;; => (+ 10 (pk 'troublesome-fn-returned (troublesome-fn))) | |
111 | ;; | |
112 | ||
113 | (define (peek . stuff) | |
114 | (newline) | |
115 | (display ";;; ") | |
116 | (write stuff) | |
117 | (newline) | |
118 | (car (last-pair stuff))) | |
119 | ||
120 | (define pk peek) | |
121 | ||
122 | (define (warn . stuff) | |
123 | (with-output-to-port (current-error-port) | |
124 | (lambda () | |
125 | (newline) | |
126 | (display ";;; WARNING ") | |
6355358a | 127 | (display stuff) |
0f2d19dd JB |
128 | (newline) |
129 | (car (last-pair stuff))))) | |
130 | ||
131 | \f | |
79451588 | 132 | ;;; {Trivial Functions} |
0f2d19dd | 133 | ;;; |
79451588 | 134 | |
6b08d75b | 135 | (define (identity x) x) |
79451588 | 136 | (define (1+ n) (+ n 1)) |
5cd06d5e | 137 | (define (1- n) (+ n -1)) |
132e5fac | 138 | (define (and=> value procedure) (and value (procedure value))) |
79451588 | 139 | |
5cd06d5e | 140 | ;;; apply-to-args is functionally redundant with apply and, worse, |
0f2d19dd JB |
141 | ;;; is less general than apply since it only takes two arguments. |
142 | ;;; | |
20edfbbd | 143 | ;;; On the other hand, apply-to-args is a syntacticly convenient way to |
0f2d19dd JB |
144 | ;;; perform binding in many circumstances when the "let" family of |
145 | ;;; of forms don't cut it. E.g.: | |
146 | ;;; | |
147 | ;;; (apply-to-args (return-3d-mouse-coords) | |
20edfbbd | 148 | ;;; (lambda (x y z) |
0f2d19dd JB |
149 | ;;; ...)) |
150 | ;;; | |
151 | ||
152 | (define (apply-to-args args fn) (apply fn args)) | |
153 | ||
154 | \f | |
6b08d75b | 155 | |
0f2d19dd JB |
156 | ;;; {Symbol Properties} |
157 | ;;; | |
158 | ||
159 | (define (symbol-property sym prop) | |
160 | (let ((pair (assoc prop (symbol-pref sym)))) | |
161 | (and pair (cdr pair)))) | |
162 | ||
163 | (define (set-symbol-property! sym prop val) | |
164 | (let ((pair (assoc prop (symbol-pref sym)))) | |
165 | (if pair | |
166 | (set-cdr! pair val) | |
167 | (symbol-pset! sym (acons prop val (symbol-pref sym)))))) | |
168 | ||
169 | (define (symbol-property-remove! sym prop) | |
170 | (let ((pair (assoc prop (symbol-pref sym)))) | |
171 | (if pair | |
172 | (symbol-pset! sym (delq! pair (symbol-pref sym)))))) | |
173 | ||
2d55a919 | 174 | ;;; {General Properties} |
5cd06d5e | 175 | ;;; |
2d55a919 MV |
176 | |
177 | ;; This is a more modern interface to properties. It will replace all | |
178 | ;; other property-like things eventually. | |
179 | ||
180 | (define (make-object-property) | |
181 | (let ((prop (primitive-make-property #f))) | |
182 | (make-procedure-with-setter | |
183 | (lambda (obj) (primitive-property-ref prop obj)) | |
184 | (lambda (obj val) (primitive-property-set! prop obj val))))) | |
185 | ||
0f2d19dd | 186 | \f |
1e531c3a | 187 | |
0f2d19dd JB |
188 | ;;; {Arrays} |
189 | ;;; | |
190 | ||
afe5177e GH |
191 | (if (provided? 'array) |
192 | (primitive-load-path "ice-9/arrays.scm")) | |
0f2d19dd JB |
193 | |
194 | \f | |
195 | ;;; {Keywords} | |
196 | ;;; | |
197 | ||
198 | (define (symbol->keyword symbol) | |
199 | (make-keyword-from-dash-symbol (symbol-append '- symbol))) | |
200 | ||
201 | (define (keyword->symbol kw) | |
06f0414c | 202 | (let ((sym (symbol->string (keyword-dash-symbol kw)))) |
11b05261 | 203 | (string->symbol (substring sym 1 (string-length sym))))) |
0f2d19dd JB |
204 | |
205 | (define (kw-arg-ref args kw) | |
206 | (let ((rem (member kw args))) | |
207 | (and rem (pair? (cdr rem)) (cadr rem)))) | |
208 | ||
209 | \f | |
fa7e9274 | 210 | |
9f9aa47b | 211 | ;;; {Structs} |
fa7e9274 MV |
212 | |
213 | (define (struct-layout s) | |
9f9aa47b | 214 | (struct-ref (struct-vtable s) vtable-index-layout)) |
fa7e9274 MV |
215 | |
216 | \f | |
d7faeb2e MD |
217 | |
218 | ;;; Environments | |
219 | ||
220 | (define the-environment | |
221 | (procedure->syntax | |
222 | (lambda (x e) | |
223 | e))) | |
224 | ||
225 | (define the-root-environment (the-environment)) | |
226 | ||
227 | (define (environment-module env) | |
228 | (let ((closure (and (pair? env) (car (last-pair env))))) | |
229 | (and closure (procedure-property closure 'module)))) | |
230 | ||
231 | \f | |
0f2d19dd JB |
232 | ;;; {Records} |
233 | ;;; | |
234 | ||
fa7e9274 MV |
235 | ;; Printing records: by default, records are printed as |
236 | ;; | |
237 | ;; #<type-name field1: val1 field2: val2 ...> | |
238 | ;; | |
239 | ;; You can change that by giving a custom printing function to | |
240 | ;; MAKE-RECORD-TYPE (after the list of field symbols). This function | |
241 | ;; will be called like | |
242 | ;; | |
243 | ;; (<printer> object port) | |
244 | ;; | |
245 | ;; It should print OBJECT to PORT. | |
246 | ||
cf8f1a90 | 247 | (define (inherit-print-state old-port new-port) |
8a30733e MD |
248 | (if (get-print-state old-port) |
249 | (port-with-print-state new-port (get-print-state old-port)) | |
cf8f1a90 MV |
250 | new-port)) |
251 | ||
9f9aa47b | 252 | ;; 0: type-name, 1: fields |
20edfbbd | 253 | (define record-type-vtable |
9f9aa47b MD |
254 | (make-vtable-vtable "prpr" 0 |
255 | (lambda (s p) | |
256 | (cond ((eq? s record-type-vtable) | |
257 | (display "#<record-type-vtable>" p)) | |
258 | (else | |
259 | (display "#<record-type " p) | |
260 | (display (record-type-name s) p) | |
261 | (display ">" p)))))) | |
0f2d19dd JB |
262 | |
263 | (define (record-type? obj) | |
264 | (and (struct? obj) (eq? record-type-vtable (struct-vtable obj)))) | |
265 | ||
266 | (define (make-record-type type-name fields . opt) | |
8e693424 | 267 | (let ((printer-fn (and (pair? opt) (car opt)))) |
0f2d19dd | 268 | (let ((struct (make-struct record-type-vtable 0 |
c7c03b9f | 269 | (make-struct-layout |
06f0414c | 270 | (apply string-append |
c7c03b9f | 271 | (map (lambda (f) "pw") fields))) |
9f9aa47b MD |
272 | (or printer-fn |
273 | (lambda (s p) | |
274 | (display "#<" p) | |
275 | (display type-name p) | |
276 | (let loop ((fields fields) | |
277 | (off 0)) | |
278 | (cond | |
279 | ((not (null? fields)) | |
280 | (display " " p) | |
281 | (display (car fields) p) | |
282 | (display ": " p) | |
283 | (display (struct-ref s off) p) | |
284 | (loop (cdr fields) (+ 1 off))))) | |
285 | (display ">" p))) | |
0f2d19dd JB |
286 | type-name |
287 | (copy-tree fields)))) | |
c8eed875 MD |
288 | ;; Temporary solution: Associate a name to the record type descriptor |
289 | ;; so that the object system can create a wrapper class for it. | |
290 | (set-struct-vtable-name! struct (if (symbol? type-name) | |
291 | type-name | |
292 | (string->symbol type-name))) | |
0f2d19dd JB |
293 | struct))) |
294 | ||
295 | (define (record-type-name obj) | |
296 | (if (record-type? obj) | |
9f9aa47b | 297 | (struct-ref obj vtable-offset-user) |
0f2d19dd JB |
298 | (error 'not-a-record-type obj))) |
299 | ||
300 | (define (record-type-fields obj) | |
301 | (if (record-type? obj) | |
9f9aa47b | 302 | (struct-ref obj (+ 1 vtable-offset-user)) |
0f2d19dd JB |
303 | (error 'not-a-record-type obj))) |
304 | ||
305 | (define (record-constructor rtd . opt) | |
8e693424 | 306 | (let ((field-names (if (pair? opt) (car opt) (record-type-fields rtd)))) |
d7faeb2e MD |
307 | (local-eval `(lambda ,field-names |
308 | (make-struct ',rtd 0 ,@(map (lambda (f) | |
309 | (if (memq f field-names) | |
310 | f | |
311 | #f)) | |
312 | (record-type-fields rtd)))) | |
313 | the-root-environment))) | |
0f2d19dd JB |
314 | |
315 | (define (record-predicate rtd) | |
316 | (lambda (obj) (and (struct? obj) (eq? rtd (struct-vtable obj))))) | |
317 | ||
318 | (define (record-accessor rtd field-name) | |
319 | (let* ((pos (list-index (record-type-fields rtd) field-name))) | |
320 | (if (not pos) | |
321 | (error 'no-such-field field-name)) | |
d7faeb2e MD |
322 | (local-eval `(lambda (obj) |
323 | (and (eq? ',rtd (record-type-descriptor obj)) | |
324 | (struct-ref obj ,pos))) | |
325 | the-root-environment))) | |
0f2d19dd JB |
326 | |
327 | (define (record-modifier rtd field-name) | |
328 | (let* ((pos (list-index (record-type-fields rtd) field-name))) | |
329 | (if (not pos) | |
330 | (error 'no-such-field field-name)) | |
d7faeb2e MD |
331 | (local-eval `(lambda (obj val) |
332 | (and (eq? ',rtd (record-type-descriptor obj)) | |
333 | (struct-set! obj ,pos val))) | |
334 | the-root-environment))) | |
0f2d19dd JB |
335 | |
336 | ||
337 | (define (record? obj) | |
338 | (and (struct? obj) (record-type? (struct-vtable obj)))) | |
339 | ||
340 | (define (record-type-descriptor obj) | |
341 | (if (struct? obj) | |
342 | (struct-vtable obj) | |
343 | (error 'not-a-record obj))) | |
344 | ||
21ed9efe MD |
345 | (provide 'record) |
346 | ||
0f2d19dd JB |
347 | \f |
348 | ;;; {Booleans} | |
349 | ;;; | |
350 | ||
351 | (define (->bool x) (not (not x))) | |
352 | ||
353 | \f | |
354 | ;;; {Symbols} | |
355 | ;;; | |
356 | ||
357 | (define (symbol-append . args) | |
06f0414c | 358 | (string->symbol (apply string-append (map symbol->string args)))) |
0f2d19dd JB |
359 | |
360 | (define (list->symbol . args) | |
361 | (string->symbol (apply list->string args))) | |
362 | ||
363 | (define (symbol . args) | |
364 | (string->symbol (apply string args))) | |
365 | ||
0f2d19dd JB |
366 | \f |
367 | ;;; {Lists} | |
368 | ;;; | |
369 | ||
370 | (define (list-index l k) | |
371 | (let loop ((n 0) | |
372 | (l l)) | |
373 | (and (not (null? l)) | |
374 | (if (eq? (car l) k) | |
375 | n | |
376 | (loop (+ n 1) (cdr l)))))) | |
377 | ||
75fd4fb6 JB |
378 | (define (make-list n . init) |
379 | (if (pair? init) (set! init (car init))) | |
0f2d19dd JB |
380 | (let loop ((answer '()) |
381 | (n n)) | |
382 | (if (<= n 0) | |
383 | answer | |
384 | (loop (cons init answer) (- n 1))))) | |
385 | ||
1729d8ff | 386 | \f |
3e3cec45 | 387 | ;;; {and-map and or-map} |
0f2d19dd JB |
388 | ;;; |
389 | ;;; (and-map fn lst) is like (and (fn (car lst)) (fn (cadr lst)) (fn...) ...) | |
390 | ;;; (or-map fn lst) is like (or (fn (car lst)) (fn (cadr lst)) (fn...) ...) | |
0f2d19dd JB |
391 | ;;; |
392 | ||
393 | ;; and-map f l | |
394 | ;; | |
395 | ;; Apply f to successive elements of l until exhaustion or f returns #f. | |
396 | ;; If returning early, return #f. Otherwise, return the last value returned | |
397 | ;; by f. If f has never been called because l is empty, return #t. | |
20edfbbd | 398 | ;; |
0f2d19dd JB |
399 | (define (and-map f lst) |
400 | (let loop ((result #t) | |
401 | (l lst)) | |
402 | (and result | |
403 | (or (and (null? l) | |
404 | result) | |
405 | (loop (f (car l)) (cdr l)))))) | |
406 | ||
407 | ;; or-map f l | |
408 | ;; | |
409 | ;; Apply f to successive elements of l until exhaustion or while f returns #f. | |
410 | ;; If returning early, return the return value of f. | |
411 | ;; | |
412 | (define (or-map f lst) | |
413 | (let loop ((result #f) | |
414 | (l lst)) | |
415 | (or result | |
416 | (and (not (null? l)) | |
417 | (loop (f (car l)) (cdr l)))))) | |
418 | ||
59e1116d | 419 | \f |
0f2d19dd | 420 | |
52cfc69b GH |
421 | (if (provided? 'posix) |
422 | (primitive-load-path "ice-9/posix.scm")) | |
6fa8995c | 423 | |
52cfc69b GH |
424 | (if (provided? 'socket) |
425 | (primitive-load-path "ice-9/networking.scm")) | |
3afb28ce | 426 | |
6fa8995c | 427 | (define file-exists? |
52cfc69b | 428 | (if (provided? 'posix) |
6fa8995c GH |
429 | (lambda (str) |
430 | (access? str F_OK)) | |
431 | (lambda (str) | |
432 | (let ((port (catch 'system-error (lambda () (open-file str OPEN_READ)) | |
433 | (lambda args #f)))) | |
434 | (if port (begin (close-port port) #t) | |
435 | #f))))) | |
436 | ||
437 | (define file-is-directory? | |
52cfc69b | 438 | (if (provided? 'posix) |
6fa8995c | 439 | (lambda (str) |
3afb28ce | 440 | (eq? (stat:type (stat str)) 'directory)) |
6fa8995c | 441 | (lambda (str) |
6fa8995c GH |
442 | (let ((port (catch 'system-error |
443 | (lambda () (open-file (string-append str "/.") | |
444 | OPEN_READ)) | |
445 | (lambda args #f)))) | |
446 | (if port (begin (close-port port) #t) | |
447 | #f))))) | |
0f2d19dd JB |
448 | |
449 | (define (has-suffix? str suffix) | |
450 | (let ((sufl (string-length suffix)) | |
451 | (sl (string-length str))) | |
452 | (and (> sl sufl) | |
453 | (string=? (substring str (- sl sufl) sl) suffix)))) | |
454 | ||
019ac1c9 MV |
455 | (define (system-error-errno args) |
456 | (if (eq? (car args) 'system-error) | |
457 | (car (list-ref args 4)) | |
458 | #f)) | |
459 | ||
0f2d19dd JB |
460 | \f |
461 | ;;; {Error Handling} | |
462 | ;;; | |
463 | ||
0f2d19dd | 464 | (define (error . args) |
21ed9efe | 465 | (save-stack) |
2194b6f0 | 466 | (if (null? args) |
5552355a | 467 | (scm-error 'misc-error #f "?" #f #f) |
8641dd9e | 468 | (let loop ((msg "~A") |
2194b6f0 GH |
469 | (rest (cdr args))) |
470 | (if (not (null? rest)) | |
8641dd9e | 471 | (loop (string-append msg " ~S") |
2194b6f0 | 472 | (cdr rest)) |
5552355a | 473 | (scm-error 'misc-error #f msg args #f))))) |
be2d2c70 | 474 | |
1349bd53 | 475 | ;; bad-throw is the hook that is called upon a throw to a an unhandled |
9a0d70e2 GH |
476 | ;; key (unless the throw has four arguments, in which case |
477 | ;; it's usually interpreted as an error throw.) | |
478 | ;; If the key has a default handler (a throw-handler-default property), | |
0f2d19dd JB |
479 | ;; it is applied to the throw. |
480 | ;; | |
1349bd53 | 481 | (define (bad-throw key . args) |
0f2d19dd JB |
482 | (let ((default (symbol-property key 'throw-handler-default))) |
483 | (or (and default (apply default key args)) | |
2194b6f0 | 484 | (apply error "unhandled-exception:" key args)))) |
0f2d19dd | 485 | |
0f2d19dd | 486 | \f |
bce074ee | 487 | |
708bf0f3 GH |
488 | (define (tm:sec obj) (vector-ref obj 0)) |
489 | (define (tm:min obj) (vector-ref obj 1)) | |
490 | (define (tm:hour obj) (vector-ref obj 2)) | |
491 | (define (tm:mday obj) (vector-ref obj 3)) | |
492 | (define (tm:mon obj) (vector-ref obj 4)) | |
493 | (define (tm:year obj) (vector-ref obj 5)) | |
494 | (define (tm:wday obj) (vector-ref obj 6)) | |
495 | (define (tm:yday obj) (vector-ref obj 7)) | |
496 | (define (tm:isdst obj) (vector-ref obj 8)) | |
497 | (define (tm:gmtoff obj) (vector-ref obj 9)) | |
498 | (define (tm:zone obj) (vector-ref obj 10)) | |
499 | ||
500 | (define (set-tm:sec obj val) (vector-set! obj 0 val)) | |
501 | (define (set-tm:min obj val) (vector-set! obj 1 val)) | |
502 | (define (set-tm:hour obj val) (vector-set! obj 2 val)) | |
503 | (define (set-tm:mday obj val) (vector-set! obj 3 val)) | |
504 | (define (set-tm:mon obj val) (vector-set! obj 4 val)) | |
505 | (define (set-tm:year obj val) (vector-set! obj 5 val)) | |
506 | (define (set-tm:wday obj val) (vector-set! obj 6 val)) | |
507 | (define (set-tm:yday obj val) (vector-set! obj 7 val)) | |
508 | (define (set-tm:isdst obj val) (vector-set! obj 8 val)) | |
509 | (define (set-tm:gmtoff obj val) (vector-set! obj 9 val)) | |
510 | (define (set-tm:zone obj val) (vector-set! obj 10 val)) | |
511 | ||
6afcd3b2 GH |
512 | (define (tms:clock obj) (vector-ref obj 0)) |
513 | (define (tms:utime obj) (vector-ref obj 1)) | |
514 | (define (tms:stime obj) (vector-ref obj 2)) | |
515 | (define (tms:cutime obj) (vector-ref obj 3)) | |
516 | (define (tms:cstime obj) (vector-ref obj 4)) | |
517 | ||
1334c61a GH |
518 | (define file-position ftell) |
519 | (define (file-set-position port offset . whence) | |
520 | (let ((whence (if (eq? whence '()) SEEK_SET (car whence)))) | |
521 | (seek port offset whence))) | |
8b13c6b3 | 522 | |
e38303a2 GH |
523 | (define (move->fdes fd/port fd) |
524 | (cond ((integer? fd/port) | |
7a6f1ffa | 525 | (dup->fdes fd/port fd) |
e38303a2 GH |
526 | (close fd/port) |
527 | fd) | |
528 | (else | |
529 | (primitive-move->fdes fd/port fd) | |
530 | (set-port-revealed! fd/port 1) | |
531 | fd/port))) | |
8b13c6b3 GH |
532 | |
533 | (define (release-port-handle port) | |
534 | (let ((revealed (port-revealed port))) | |
535 | (if (> revealed 0) | |
536 | (set-port-revealed! port (- revealed 1))))) | |
0f2d19dd | 537 | |
e38303a2 | 538 | (define (dup->port port/fd mode . maybe-fd) |
7a6f1ffa | 539 | (let ((port (fdopen (apply dup->fdes port/fd maybe-fd) |
e38303a2 GH |
540 | mode))) |
541 | (if (pair? maybe-fd) | |
542 | (set-port-revealed! port 1)) | |
543 | port)) | |
20edfbbd | 544 | |
e38303a2 GH |
545 | (define (dup->inport port/fd . maybe-fd) |
546 | (apply dup->port port/fd "r" maybe-fd)) | |
547 | ||
548 | (define (dup->outport port/fd . maybe-fd) | |
549 | (apply dup->port port/fd "w" maybe-fd)) | |
550 | ||
e38303a2 GH |
551 | (define (dup port/fd . maybe-fd) |
552 | (if (integer? port/fd) | |
553 | (apply dup->fdes port/fd maybe-fd) | |
554 | (apply dup->port port/fd (port-mode port/fd) maybe-fd))) | |
555 | ||
556 | (define (duplicate-port port modes) | |
557 | (dup->port port modes)) | |
558 | ||
559 | (define (fdes->inport fdes) | |
560 | (let loop ((rest-ports (fdes->ports fdes))) | |
561 | (cond ((null? rest-ports) | |
562 | (let ((result (fdopen fdes "r"))) | |
563 | (set-port-revealed! result 1) | |
564 | result)) | |
565 | ((input-port? (car rest-ports)) | |
566 | (set-port-revealed! (car rest-ports) | |
567 | (+ (port-revealed (car rest-ports)) 1)) | |
568 | (car rest-ports)) | |
569 | (else | |
570 | (loop (cdr rest-ports)))))) | |
571 | ||
572 | (define (fdes->outport fdes) | |
573 | (let loop ((rest-ports (fdes->ports fdes))) | |
574 | (cond ((null? rest-ports) | |
575 | (let ((result (fdopen fdes "w"))) | |
576 | (set-port-revealed! result 1) | |
577 | result)) | |
578 | ((output-port? (car rest-ports)) | |
579 | (set-port-revealed! (car rest-ports) | |
580 | (+ (port-revealed (car rest-ports)) 1)) | |
581 | (car rest-ports)) | |
582 | (else | |
583 | (loop (cdr rest-ports)))))) | |
584 | ||
585 | (define (port->fdes port) | |
586 | (set-port-revealed! port (+ (port-revealed port) 1)) | |
587 | (fileno port)) | |
588 | ||
956055a9 GH |
589 | (define (setenv name value) |
590 | (if value | |
591 | (putenv (string-append name "=" value)) | |
592 | (putenv name))) | |
593 | ||
5c1254da MV |
594 | (define (unsetenv name) |
595 | "Remove the entry for NAME from the environment." | |
596 | (putenv name)) | |
597 | ||
0f2d19dd JB |
598 | \f |
599 | ;;; {Load Paths} | |
600 | ;;; | |
601 | ||
0f2d19dd JB |
602 | ;;; Here for backward compatability |
603 | ;; | |
604 | (define scheme-file-suffix (lambda () ".scm")) | |
605 | ||
3cab8392 JB |
606 | (define (in-vicinity vicinity file) |
607 | (let ((tail (let ((len (string-length vicinity))) | |
534a0099 MD |
608 | (if (zero? len) |
609 | #f | |
3cab8392 JB |
610 | (string-ref vicinity (- len 1)))))) |
611 | (string-append vicinity | |
534a0099 MD |
612 | (if (or (not tail) |
613 | (eq? tail #\/)) | |
614 | "" | |
615 | "/") | |
3cab8392 | 616 | file))) |
02ceadb8 | 617 | |
0f2d19dd | 618 | \f |
ef00e7f4 JB |
619 | ;;; {Help for scm_shell} |
620 | ;;; The argument-processing code used by Guile-based shells generates | |
621 | ;;; Scheme code based on the argument list. This page contains help | |
622 | ;;; functions for the code it generates. | |
623 | ||
ef00e7f4 JB |
624 | (define (command-line) (program-arguments)) |
625 | ||
5aa7fe69 JB |
626 | ;; This is mostly for the internal use of the code generated by |
627 | ;; scm_compile_shell_switches. | |
eef6519b MV |
628 | |
629 | (define (turn-on-debugging) | |
630 | (debug-enable 'debug) | |
631 | (debug-enable 'backtrace) | |
632 | (read-enable 'positions)) | |
4eecfeb7 | 633 | |
ef00e7f4 | 634 | (define (load-user-init) |
1f08acd9 GH |
635 | (let* ((home (or (getenv "HOME") |
636 | (false-if-exception (passwd:dir (getpwuid (getuid)))) | |
637 | "/")) ;; fallback for cygwin etc. | |
638 | (init-file (in-vicinity home ".guile"))) | |
639 | (if (file-exists? init-file) | |
640 | (primitive-load init-file)))) | |
ef00e7f4 JB |
641 | |
642 | \f | |
a06181a2 JB |
643 | ;;; {Loading by paths} |
644 | ||
645 | ;;; Load a Scheme source file named NAME, searching for it in the | |
646 | ;;; directories listed in %load-path, and applying each of the file | |
647 | ;;; name extensions listed in %load-extensions. | |
648 | (define (load-from-path name) | |
649 | (start-stack 'load-stack | |
75a97b92 | 650 | (primitive-load-path name))) |
0f2d19dd | 651 | |
5552355a | 652 | |
0f2d19dd | 653 | \f |
0f2d19dd JB |
654 | ;;; {Transcendental Functions} |
655 | ;;; | |
656 | ;;; Derived from "Transcen.scm", Complex trancendental functions for SCM. | |
0543c9b7 | 657 | ;;; Written by Jerry D. Hedden, (C) FSF. |
0f2d19dd JB |
658 | ;;; See the file `COPYING' for terms applying to this program. |
659 | ;;; | |
660 | ||
661 | (define (exp z) | |
662 | (if (real? z) ($exp z) | |
663 | (make-polar ($exp (real-part z)) (imag-part z)))) | |
664 | ||
665 | (define (log z) | |
666 | (if (and (real? z) (>= z 0)) | |
667 | ($log z) | |
668 | (make-rectangular ($log (magnitude z)) (angle z)))) | |
669 | ||
670 | (define (sqrt z) | |
671 | (if (real? z) | |
672 | (if (negative? z) (make-rectangular 0 ($sqrt (- z))) | |
0ac6420c | 673 | ($sqrt z)) |
0f2d19dd JB |
674 | (make-polar ($sqrt (magnitude z)) (/ (angle z) 2)))) |
675 | ||
676 | (define expt | |
677 | (let ((integer-expt integer-expt)) | |
678 | (lambda (z1 z2) | |
22381005 | 679 | (cond ((integer? z2) |
0ad7cc4f RB |
680 | (if (negative? z2) |
681 | (/ 1 (integer-expt z1 (- z2))) | |
682 | (integer-expt z1 z2))) | |
0f2d19dd JB |
683 | ((and (real? z2) (real? z1) (>= z1 0)) |
684 | ($expt z1 z2)) | |
685 | (else | |
686 | (exp (* z2 (log z1)))))))) | |
687 | ||
688 | (define (sinh z) | |
689 | (if (real? z) ($sinh z) | |
690 | (let ((x (real-part z)) (y (imag-part z))) | |
691 | (make-rectangular (* ($sinh x) ($cos y)) | |
692 | (* ($cosh x) ($sin y)))))) | |
693 | (define (cosh z) | |
694 | (if (real? z) ($cosh z) | |
695 | (let ((x (real-part z)) (y (imag-part z))) | |
696 | (make-rectangular (* ($cosh x) ($cos y)) | |
697 | (* ($sinh x) ($sin y)))))) | |
698 | (define (tanh z) | |
699 | (if (real? z) ($tanh z) | |
700 | (let* ((x (* 2 (real-part z))) | |
701 | (y (* 2 (imag-part z))) | |
702 | (w (+ ($cosh x) ($cos y)))) | |
703 | (make-rectangular (/ ($sinh x) w) (/ ($sin y) w))))) | |
704 | ||
705 | (define (asinh z) | |
706 | (if (real? z) ($asinh z) | |
707 | (log (+ z (sqrt (+ (* z z) 1)))))) | |
708 | ||
709 | (define (acosh z) | |
710 | (if (and (real? z) (>= z 1)) | |
711 | ($acosh z) | |
712 | (log (+ z (sqrt (- (* z z) 1)))))) | |
713 | ||
714 | (define (atanh z) | |
715 | (if (and (real? z) (> z -1) (< z 1)) | |
716 | ($atanh z) | |
717 | (/ (log (/ (+ 1 z) (- 1 z))) 2))) | |
718 | ||
719 | (define (sin z) | |
720 | (if (real? z) ($sin z) | |
721 | (let ((x (real-part z)) (y (imag-part z))) | |
722 | (make-rectangular (* ($sin x) ($cosh y)) | |
723 | (* ($cos x) ($sinh y)))))) | |
724 | (define (cos z) | |
725 | (if (real? z) ($cos z) | |
726 | (let ((x (real-part z)) (y (imag-part z))) | |
727 | (make-rectangular (* ($cos x) ($cosh y)) | |
728 | (- (* ($sin x) ($sinh y))))))) | |
729 | (define (tan z) | |
730 | (if (real? z) ($tan z) | |
731 | (let* ((x (* 2 (real-part z))) | |
732 | (y (* 2 (imag-part z))) | |
733 | (w (+ ($cos x) ($cosh y)))) | |
734 | (make-rectangular (/ ($sin x) w) (/ ($sinh y) w))))) | |
735 | ||
736 | (define (asin z) | |
737 | (if (and (real? z) (>= z -1) (<= z 1)) | |
738 | ($asin z) | |
739 | (* -i (asinh (* +i z))))) | |
740 | ||
741 | (define (acos z) | |
742 | (if (and (real? z) (>= z -1) (<= z 1)) | |
743 | ($acos z) | |
744 | (+ (/ (angle -1) 2) (* +i (asinh (* +i z)))))) | |
745 | ||
746 | (define (atan z . y) | |
747 | (if (null? y) | |
748 | (if (real? z) ($atan z) | |
749 | (/ (log (/ (- +i z) (+ +i z))) +2i)) | |
750 | ($atan2 z (car y)))) | |
751 | ||
65495221 GH |
752 | (define (log10 arg) |
753 | (/ (log arg) (log 10))) | |
754 | ||
0f2d19dd | 755 | \f |
0f2d19dd JB |
756 | |
757 | ;;; {Reader Extensions} | |
758 | ;;; | |
759 | ||
760 | ;;; Reader code for various "#c" forms. | |
761 | ;;; | |
762 | ||
75a97b92 GH |
763 | (read-hash-extend #\' (lambda (c port) |
764 | (read port))) | |
600c9584 RB |
765 | |
766 | (define read-eval? (make-fluid)) | |
767 | (fluid-set! read-eval? #f) | |
768 | (read-hash-extend #\. | |
769 | (lambda (c port) | |
770 | (if (fluid-ref read-eval?) | |
771 | (eval (read port) (interaction-environment)) | |
772 | (error | |
71335c0d | 773 | "#. read expansion found and read-eval? is #f.")))) |
75a97b92 | 774 | |
0f2d19dd JB |
775 | \f |
776 | ;;; {Command Line Options} | |
777 | ;;; | |
778 | ||
779 | (define (get-option argv kw-opts kw-args return) | |
780 | (cond | |
781 | ((null? argv) | |
782 | (return #f #f argv)) | |
783 | ||
784 | ((or (not (eq? #\- (string-ref (car argv) 0))) | |
785 | (eq? (string-length (car argv)) 1)) | |
786 | (return 'normal-arg (car argv) (cdr argv))) | |
787 | ||
788 | ((eq? #\- (string-ref (car argv) 1)) | |
789 | (let* ((kw-arg-pos (or (string-index (car argv) #\=) | |
790 | (string-length (car argv)))) | |
791 | (kw (symbol->keyword (substring (car argv) 2 kw-arg-pos))) | |
792 | (kw-opt? (member kw kw-opts)) | |
793 | (kw-arg? (member kw kw-args)) | |
794 | (arg (or (and (not (eq? kw-arg-pos (string-length (car argv)))) | |
795 | (substring (car argv) | |
796 | (+ kw-arg-pos 1) | |
797 | (string-length (car argv)))) | |
798 | (and kw-arg? | |
799 | (begin (set! argv (cdr argv)) (car argv)))))) | |
800 | (if (or kw-opt? kw-arg?) | |
801 | (return kw arg (cdr argv)) | |
802 | (return 'usage-error kw (cdr argv))))) | |
803 | ||
804 | (else | |
805 | (let* ((char (substring (car argv) 1 2)) | |
806 | (kw (symbol->keyword char))) | |
807 | (cond | |
808 | ||
809 | ((member kw kw-opts) | |
810 | (let* ((rest-car (substring (car argv) 2 (string-length (car argv)))) | |
811 | (new-argv (if (= 0 (string-length rest-car)) | |
812 | (cdr argv) | |
813 | (cons (string-append "-" rest-car) (cdr argv))))) | |
814 | (return kw #f new-argv))) | |
815 | ||
816 | ((member kw kw-args) | |
817 | (let* ((rest-car (substring (car argv) 2 (string-length (car argv)))) | |
818 | (arg (if (= 0 (string-length rest-car)) | |
819 | (cadr argv) | |
820 | rest-car)) | |
821 | (new-argv (if (= 0 (string-length rest-car)) | |
822 | (cddr argv) | |
823 | (cdr argv)))) | |
824 | (return kw arg new-argv))) | |
825 | ||
826 | (else (return 'usage-error kw argv))))))) | |
827 | ||
828 | (define (for-next-option proc argv kw-opts kw-args) | |
829 | (let loop ((argv argv)) | |
830 | (get-option argv kw-opts kw-args | |
831 | (lambda (opt opt-arg argv) | |
832 | (and opt (proc opt opt-arg argv loop)))))) | |
833 | ||
834 | (define (display-usage-report kw-desc) | |
835 | (for-each | |
836 | (lambda (kw) | |
837 | (or (eq? (car kw) #t) | |
838 | (eq? (car kw) 'else) | |
839 | (let* ((opt-desc kw) | |
840 | (help (cadr opt-desc)) | |
841 | (opts (car opt-desc)) | |
842 | (opts-proper (if (string? (car opts)) (cdr opts) opts)) | |
843 | (arg-name (if (string? (car opts)) | |
844 | (string-append "<" (car opts) ">") | |
845 | "")) | |
846 | (left-part (string-append | |
847 | (with-output-to-string | |
848 | (lambda () | |
849 | (map (lambda (x) (display (keyword-symbol x)) (display " ")) | |
850 | opts-proper))) | |
851 | arg-name)) | |
11b05261 MD |
852 | (middle-part (if (and (< (string-length left-part) 30) |
853 | (< (string-length help) 40)) | |
854 | (make-string (- 30 (string-length left-part)) #\ ) | |
0f2d19dd JB |
855 | "\n\t"))) |
856 | (display left-part) | |
857 | (display middle-part) | |
858 | (display help) | |
859 | (newline)))) | |
860 | kw-desc)) | |
0f2d19dd | 861 | |
20edfbbd TTN |
862 | |
863 | ||
0f2d19dd JB |
864 | (define (transform-usage-lambda cases) |
865 | (let* ((raw-usage (delq! 'else (map car cases))) | |
866 | (usage-sans-specials (map (lambda (x) | |
867 | (or (and (not (list? x)) x) | |
868 | (and (symbol? (car x)) #t) | |
869 | (and (boolean? (car x)) #t) | |
870 | x)) | |
871 | raw-usage)) | |
ed440df5 | 872 | (usage-desc (delq! #t usage-sans-specials)) |
0f2d19dd JB |
873 | (kw-desc (map car usage-desc)) |
874 | (kw-opts (apply append (map (lambda (x) (and (not (string? (car x))) x)) kw-desc))) | |
875 | (kw-args (apply append (map (lambda (x) (and (string? (car x)) (cdr x))) kw-desc))) | |
876 | (transmogrified-cases (map (lambda (case) | |
877 | (cons (let ((opts (car case))) | |
878 | (if (or (boolean? opts) (eq? 'else opts)) | |
879 | opts | |
880 | (cond | |
881 | ((symbol? (car opts)) opts) | |
882 | ((boolean? (car opts)) opts) | |
883 | ((string? (caar opts)) (cdar opts)) | |
884 | (else (car opts))))) | |
885 | (cdr case))) | |
886 | cases))) | |
887 | `(let ((%display-usage (lambda () (display-usage-report ',usage-desc)))) | |
888 | (lambda (%argv) | |
889 | (let %next-arg ((%argv %argv)) | |
890 | (get-option %argv | |
891 | ',kw-opts | |
892 | ',kw-args | |
893 | (lambda (%opt %arg %new-argv) | |
894 | (case %opt | |
895 | ,@ transmogrified-cases)))))))) | |
896 | ||
897 | ||
898 | \f | |
899 | ||
900 | ;;; {Low Level Modules} | |
901 | ;;; | |
902 | ;;; These are the low level data structures for modules. | |
903 | ;;; | |
904 | ;;; !!! warning: The interface to lazy binder procedures is going | |
905 | ;;; to be changed in an incompatible way to permit all the basic | |
906 | ;;; module ops to be virtualized. | |
907 | ;;; | |
908 | ;;; (make-module size use-list lazy-binding-proc) => module | |
909 | ;;; module-{obarray,uses,binder}[|-set!] | |
910 | ;;; (module? obj) => [#t|#f] | |
911 | ;;; (module-locally-bound? module symbol) => [#t|#f] | |
912 | ;;; (module-bound? module symbol) => [#t|#f] | |
913 | ;;; (module-symbol-locally-interned? module symbol) => [#t|#f] | |
914 | ;;; (module-symbol-interned? module symbol) => [#t|#f] | |
915 | ;;; (module-local-variable module symbol) => [#<variable ...> | #f] | |
916 | ;;; (module-variable module symbol) => [#<variable ...> | #f] | |
917 | ;;; (module-symbol-binding module symbol opt-value) | |
918 | ;;; => [ <obj> | opt-value | an error occurs ] | |
919 | ;;; (module-make-local-var! module symbol) => #<variable...> | |
920 | ;;; (module-add! module symbol var) => unspecified | |
921 | ;;; (module-remove! module symbol) => unspecified | |
922 | ;;; (module-for-each proc module) => unspecified | |
923 | ;;; (make-scm-module) => module ; a lazy copy of the symhash module | |
924 | ;;; (set-current-module module) => unspecified | |
925 | ;;; (current-module) => #<module...> | |
926 | ;;; | |
927 | ;;; | |
928 | ||
929 | \f | |
44cf1f0f JB |
930 | ;;; {Printing Modules} |
931 | ;; This is how modules are printed. You can re-define it. | |
fa7e9274 MV |
932 | ;; (Redefining is actually more complicated than simply redefining |
933 | ;; %print-module because that would only change the binding and not | |
934 | ;; the value stored in the vtable that determines how record are | |
935 | ;; printed. Sigh.) | |
936 | ||
937 | (define (%print-module mod port) ; unused args: depth length style table) | |
0f2d19dd JB |
938 | (display "#<" port) |
939 | (display (or (module-kind mod) "module") port) | |
940 | (let ((name (module-name mod))) | |
941 | (if name | |
942 | (begin | |
943 | (display " " port) | |
944 | (display name port)))) | |
945 | (display " " port) | |
946 | (display (number->string (object-address mod) 16) port) | |
947 | (display ">" port)) | |
948 | ||
949 | ;; module-type | |
950 | ;; | |
951 | ;; A module is characterized by an obarray in which local symbols | |
952 | ;; are interned, a list of modules, "uses", from which non-local | |
953 | ;; bindings can be inherited, and an optional lazy-binder which | |
31d50456 | 954 | ;; is a (CLOSURE module symbol) which, as a last resort, can provide |
0f2d19dd JB |
955 | ;; bindings that would otherwise not be found locally in the module. |
956 | ;; | |
d7faeb2e MD |
957 | ;; NOTE: If you change here, you also need to change libguile/modules.h. |
958 | ;; | |
0f2d19dd | 959 | (define module-type |
7a0ff2f8 | 960 | (make-record-type 'module |
1777c18b | 961 | '(obarray uses binder eval-closure transformer name kind |
8d8dac1f MD |
962 | duplicates-handlers duplicates-interface |
963 | observers weak-observers observer-id) | |
8b718458 | 964 | %print-module)) |
0f2d19dd | 965 | |
8b718458 | 966 | ;; make-module &opt size uses binder |
0f2d19dd | 967 | ;; |
8b718458 JB |
968 | ;; Create a new module, perhaps with a particular size of obarray, |
969 | ;; initial uses list, or binding procedure. | |
0f2d19dd | 970 | ;; |
0f2d19dd JB |
971 | (define make-module |
972 | (lambda args | |
0f2d19dd | 973 | |
8b718458 JB |
974 | (define (parse-arg index default) |
975 | (if (> (length args) index) | |
976 | (list-ref args index) | |
977 | default)) | |
978 | ||
979 | (if (> (length args) 3) | |
980 | (error "Too many args to make-module." args)) | |
0f2d19dd | 981 | |
231a4ea8 | 982 | (let ((size (parse-arg 0 31)) |
8b718458 JB |
983 | (uses (parse-arg 1 '())) |
984 | (binder (parse-arg 2 #f))) | |
0f2d19dd | 985 | |
8b718458 JB |
986 | (if (not (integer? size)) |
987 | (error "Illegal size to make-module." size)) | |
988 | (if (not (and (list? uses) | |
989 | (and-map module? uses))) | |
990 | (error "Incorrect use list." uses)) | |
0f2d19dd JB |
991 | (if (and binder (not (procedure? binder))) |
992 | (error | |
993 | "Lazy-binder expected to be a procedure or #f." binder)) | |
994 | ||
231a4ea8 MD |
995 | (let ((module (module-constructor (and (not (zero? size)) |
996 | (make-hash-table size)) | |
8d8dac1f | 997 | uses binder #f #f #f #f #f #f |
1777c18b MD |
998 | '() |
999 | (make-weak-value-hash-table 31) | |
1000 | 0))) | |
8b718458 JB |
1001 | |
1002 | ;; We can't pass this as an argument to module-constructor, | |
1003 | ;; because we need it to close over a pointer to the module | |
1004 | ;; itself. | |
6906bd0d | 1005 | (set-module-eval-closure! module (standard-eval-closure module)) |
8b718458 JB |
1006 | |
1007 | module)))) | |
0f2d19dd | 1008 | |
8b718458 | 1009 | (define module-constructor (record-constructor module-type)) |
0f2d19dd JB |
1010 | (define module-obarray (record-accessor module-type 'obarray)) |
1011 | (define set-module-obarray! (record-modifier module-type 'obarray)) | |
1012 | (define module-uses (record-accessor module-type 'uses)) | |
1013 | (define set-module-uses! (record-modifier module-type 'uses)) | |
1014 | (define module-binder (record-accessor module-type 'binder)) | |
1015 | (define set-module-binder! (record-modifier module-type 'binder)) | |
631c1902 MD |
1016 | |
1017 | ;; NOTE: This binding is used in libguile/modules.c. | |
31d50456 | 1018 | (define module-eval-closure (record-accessor module-type 'eval-closure)) |
631c1902 | 1019 | |
7a0ff2f8 MD |
1020 | (define module-transformer (record-accessor module-type 'transformer)) |
1021 | (define set-module-transformer! (record-modifier module-type 'transformer)) | |
0f2d19dd JB |
1022 | (define module-name (record-accessor module-type 'name)) |
1023 | (define set-module-name! (record-modifier module-type 'name)) | |
1024 | (define module-kind (record-accessor module-type 'kind)) | |
1025 | (define set-module-kind! (record-modifier module-type 'kind)) | |
8d8dac1f MD |
1026 | (define module-duplicates-handlers |
1027 | (record-accessor module-type 'duplicates-handlers)) | |
1028 | (define set-module-duplicates-handlers! | |
1029 | (record-modifier module-type 'duplicates-handlers)) | |
1030 | (define module-duplicates-interface | |
1031 | (record-accessor module-type 'duplicates-interface)) | |
1032 | (define set-module-duplicates-interface! | |
1033 | (record-modifier module-type 'duplicates-interface)) | |
1777c18b MD |
1034 | (define module-observers (record-accessor module-type 'observers)) |
1035 | (define set-module-observers! (record-modifier module-type 'observers)) | |
1036 | (define module-weak-observers (record-accessor module-type 'weak-observers)) | |
1037 | (define module-observer-id (record-accessor module-type 'observer-id)) | |
1038 | (define set-module-observer-id! (record-modifier module-type 'observer-id)) | |
0f2d19dd JB |
1039 | (define module? (record-predicate module-type)) |
1040 | ||
edc185c7 MD |
1041 | (define set-module-eval-closure! |
1042 | (let ((setter (record-modifier module-type 'eval-closure))) | |
1043 | (lambda (module closure) | |
1044 | (setter module closure) | |
1045 | ;; Make it possible to lookup the module from the environment. | |
1046 | ;; This implementation is correct since an eval closure can belong | |
1047 | ;; to maximally one module. | |
1048 | (set-procedure-property! closure 'module module)))) | |
8b718458 | 1049 | |
0f2d19dd | 1050 | \f |
1777c18b MD |
1051 | ;;; {Observer protocol} |
1052 | ;;; | |
1053 | ||
1054 | (define (module-observe module proc) | |
1055 | (set-module-observers! module (cons proc (module-observers module))) | |
1056 | (cons module proc)) | |
1057 | ||
1058 | (define (module-observe-weak module proc) | |
1059 | (let ((id (module-observer-id module))) | |
1060 | (hash-set! (module-weak-observers module) id proc) | |
1061 | (set-module-observer-id! module (+ 1 id)) | |
1062 | (cons module id))) | |
1063 | ||
1064 | (define (module-unobserve token) | |
1065 | (let ((module (car token)) | |
1066 | (id (cdr token))) | |
1067 | (if (integer? id) | |
1068 | (hash-remove! (module-weak-observers module) id) | |
1069 | (set-module-observers! module (delq1! id (module-observers module))))) | |
1070 | *unspecified*) | |
1071 | ||
d57da08b MD |
1072 | (define module-defer-observers #f) |
1073 | (define module-defer-observers-mutex (make-mutex)) | |
1074 | (define module-defer-observers-table (make-hash-table)) | |
1075 | ||
1a961d7e | 1076 | (define (module-modified m) |
d57da08b MD |
1077 | (if module-defer-observers |
1078 | (hash-set! module-defer-observers-table m #t) | |
1079 | (module-call-observers m))) | |
1080 | ||
1081 | ;;; This function can be used to delay calls to observers so that they | |
1082 | ;;; can be called once only in the face of massive updating of modules. | |
1083 | ;;; | |
1084 | (define (call-with-deferred-observers thunk) | |
1085 | (dynamic-wind | |
1086 | (lambda () | |
1087 | (lock-mutex module-defer-observers-mutex) | |
1088 | (set! module-defer-observers #t)) | |
1089 | thunk | |
1090 | (lambda () | |
1091 | (set! module-defer-observers #f) | |
1092 | (hash-for-each (lambda (m dummy) | |
1093 | (module-call-observers m)) | |
1094 | module-defer-observers-table) | |
1095 | (hash-clear! module-defer-observers-table) | |
1096 | (unlock-mutex module-defer-observers-mutex)))) | |
1097 | ||
1098 | (define (module-call-observers m) | |
1777c18b MD |
1099 | (for-each (lambda (proc) (proc m)) (module-observers m)) |
1100 | (hash-fold (lambda (id proc res) (proc m)) #f (module-weak-observers m))) | |
1101 | ||
1102 | \f | |
0f2d19dd JB |
1103 | ;;; {Module Searching in General} |
1104 | ;;; | |
1105 | ;;; We sometimes want to look for properties of a symbol | |
1106 | ;;; just within the obarray of one module. If the property | |
1107 | ;;; holds, then it is said to hold ``locally'' as in, ``The symbol | |
1108 | ;;; DISPLAY is locally rebound in the module `safe-guile'.'' | |
1109 | ;;; | |
1110 | ;;; | |
1111 | ;;; Other times, we want to test for a symbol property in the obarray | |
1112 | ;;; of M and, if it is not found there, try each of the modules in the | |
1113 | ;;; uses list of M. This is the normal way of testing for some | |
1114 | ;;; property, so we state these properties without qualification as | |
1115 | ;;; in: ``The symbol 'fnord is interned in module M because it is | |
1116 | ;;; interned locally in module M2 which is a member of the uses list | |
1117 | ;;; of M.'' | |
1118 | ;;; | |
1119 | ||
1120 | ;; module-search fn m | |
20edfbbd | 1121 | ;; |
0f2d19dd JB |
1122 | ;; return the first non-#f result of FN applied to M and then to |
1123 | ;; the modules in the uses of m, and so on recursively. If all applications | |
1124 | ;; return #f, then so does this function. | |
1125 | ;; | |
1126 | (define (module-search fn m v) | |
1127 | (define (loop pos) | |
1128 | (and (pair? pos) | |
1129 | (or (module-search fn (car pos) v) | |
1130 | (loop (cdr pos))))) | |
1131 | (or (fn m v) | |
1132 | (loop (module-uses m)))) | |
1133 | ||
1134 | ||
1135 | ;;; {Is a symbol bound in a module?} | |
1136 | ;;; | |
1137 | ;;; Symbol S in Module M is bound if S is interned in M and if the binding | |
1138 | ;;; of S in M has been set to some well-defined value. | |
1139 | ;;; | |
1140 | ||
1141 | ;; module-locally-bound? module symbol | |
1142 | ;; | |
1143 | ;; Is a symbol bound (interned and defined) locally in a given module? | |
1144 | ;; | |
1145 | (define (module-locally-bound? m v) | |
1146 | (let ((var (module-local-variable m v))) | |
1147 | (and var | |
1148 | (variable-bound? var)))) | |
1149 | ||
1150 | ;; module-bound? module symbol | |
1151 | ;; | |
1152 | ;; Is a symbol bound (interned and defined) anywhere in a given module | |
1153 | ;; or its uses? | |
1154 | ;; | |
1155 | (define (module-bound? m v) | |
1156 | (module-search module-locally-bound? m v)) | |
1157 | ||
1158 | ;;; {Is a symbol interned in a module?} | |
1159 | ;;; | |
20edfbbd | 1160 | ;;; Symbol S in Module M is interned if S occurs in |
0f2d19dd JB |
1161 | ;;; of S in M has been set to some well-defined value. |
1162 | ;;; | |
1163 | ;;; It is possible to intern a symbol in a module without providing | |
1164 | ;;; an initial binding for the corresponding variable. This is done | |
1165 | ;;; with: | |
1166 | ;;; (module-add! module symbol (make-undefined-variable)) | |
1167 | ;;; | |
1168 | ;;; In that case, the symbol is interned in the module, but not | |
1169 | ;;; bound there. The unbound symbol shadows any binding for that | |
1170 | ;;; symbol that might otherwise be inherited from a member of the uses list. | |
1171 | ;;; | |
1172 | ||
1173 | (define (module-obarray-get-handle ob key) | |
1174 | ((if (symbol? key) hashq-get-handle hash-get-handle) ob key)) | |
1175 | ||
1176 | (define (module-obarray-ref ob key) | |
1177 | ((if (symbol? key) hashq-ref hash-ref) ob key)) | |
1178 | ||
1179 | (define (module-obarray-set! ob key val) | |
1180 | ((if (symbol? key) hashq-set! hash-set!) ob key val)) | |
1181 | ||
1182 | (define (module-obarray-remove! ob key) | |
1183 | ((if (symbol? key) hashq-remove! hash-remove!) ob key)) | |
1184 | ||
1185 | ;; module-symbol-locally-interned? module symbol | |
20edfbbd | 1186 | ;; |
0f2d19dd JB |
1187 | ;; is a symbol interned (not neccessarily defined) locally in a given module |
1188 | ;; or its uses? Interned symbols shadow inherited bindings even if | |
1189 | ;; they are not themselves bound to a defined value. | |
1190 | ;; | |
1191 | (define (module-symbol-locally-interned? m v) | |
1192 | (not (not (module-obarray-get-handle (module-obarray m) v)))) | |
1193 | ||
1194 | ;; module-symbol-interned? module symbol | |
20edfbbd | 1195 | ;; |
0f2d19dd JB |
1196 | ;; is a symbol interned (not neccessarily defined) anywhere in a given module |
1197 | ;; or its uses? Interned symbols shadow inherited bindings even if | |
1198 | ;; they are not themselves bound to a defined value. | |
1199 | ;; | |
1200 | (define (module-symbol-interned? m v) | |
1201 | (module-search module-symbol-locally-interned? m v)) | |
1202 | ||
1203 | ||
1204 | ;;; {Mapping modules x symbols --> variables} | |
1205 | ;;; | |
1206 | ||
1207 | ;; module-local-variable module symbol | |
1208 | ;; return the local variable associated with a MODULE and SYMBOL. | |
1209 | ;; | |
1210 | ;;; This function is very important. It is the only function that can | |
1211 | ;;; return a variable from a module other than the mutators that store | |
1212 | ;;; new variables in modules. Therefore, this function is the location | |
1213 | ;;; of the "lazy binder" hack. | |
1214 | ;;; | |
1215 | ;;; If symbol is defined in MODULE, and if the definition binds symbol | |
1216 | ;;; to a variable, return that variable object. | |
1217 | ;;; | |
1218 | ;;; If the symbols is not found at first, but the module has a lazy binder, | |
1219 | ;;; then try the binder. | |
1220 | ;;; | |
1221 | ;;; If the symbol is not found at all, return #f. | |
1222 | ;;; | |
1223 | (define (module-local-variable m v) | |
6fa8995c GH |
1224 | ; (caddr |
1225 | ; (list m v | |
0f2d19dd JB |
1226 | (let ((b (module-obarray-ref (module-obarray m) v))) |
1227 | (or (and (variable? b) b) | |
1228 | (and (module-binder m) | |
6fa8995c GH |
1229 | ((module-binder m) m v #f))))) |
1230 | ;)) | |
0f2d19dd JB |
1231 | |
1232 | ;; module-variable module symbol | |
20edfbbd TTN |
1233 | ;; |
1234 | ;; like module-local-variable, except search the uses in the | |
0f2d19dd JB |
1235 | ;; case V is not found in M. |
1236 | ;; | |
6906bd0d MD |
1237 | ;; NOTE: This function is superseded with C code (see modules.c) |
1238 | ;;; when using the standard eval closure. | |
1239 | ;; | |
0f2d19dd JB |
1240 | (define (module-variable m v) |
1241 | (module-search module-local-variable m v)) | |
1242 | ||
1243 | ||
1244 | ;;; {Mapping modules x symbols --> bindings} | |
1245 | ;;; | |
1246 | ;;; These are similar to the mapping to variables, except that the | |
1247 | ;;; variable is dereferenced. | |
1248 | ;;; | |
1249 | ||
1250 | ;; module-symbol-binding module symbol opt-value | |
20edfbbd | 1251 | ;; |
0f2d19dd JB |
1252 | ;; return the binding of a variable specified by name within |
1253 | ;; a given module, signalling an error if the variable is unbound. | |
1254 | ;; If the OPT-VALUE is passed, then instead of signalling an error, | |
1255 | ;; return OPT-VALUE. | |
1256 | ;; | |
1257 | (define (module-symbol-local-binding m v . opt-val) | |
1258 | (let ((var (module-local-variable m v))) | |
7b07e5ef | 1259 | (if (and var (variable-bound? var)) |
0f2d19dd JB |
1260 | (variable-ref var) |
1261 | (if (not (null? opt-val)) | |
1262 | (car opt-val) | |
1263 | (error "Locally unbound variable." v))))) | |
1264 | ||
1265 | ;; module-symbol-binding module symbol opt-value | |
20edfbbd | 1266 | ;; |
0f2d19dd JB |
1267 | ;; return the binding of a variable specified by name within |
1268 | ;; a given module, signalling an error if the variable is unbound. | |
1269 | ;; If the OPT-VALUE is passed, then instead of signalling an error, | |
1270 | ;; return OPT-VALUE. | |
1271 | ;; | |
1272 | (define (module-symbol-binding m v . opt-val) | |
1273 | (let ((var (module-variable m v))) | |
7b07e5ef | 1274 | (if (and var (variable-bound? var)) |
0f2d19dd JB |
1275 | (variable-ref var) |
1276 | (if (not (null? opt-val)) | |
1277 | (car opt-val) | |
1278 | (error "Unbound variable." v))))) | |
1279 | ||
1280 | ||
1281 | \f | |
1282 | ;;; {Adding Variables to Modules} | |
1283 | ;;; | |
1284 | ;;; | |
1285 | ||
1286 | ||
1287 | ;; module-make-local-var! module symbol | |
20edfbbd | 1288 | ;; |
0f2d19dd JB |
1289 | ;; ensure a variable for V in the local namespace of M. |
1290 | ;; If no variable was already there, then create a new and uninitialzied | |
1291 | ;; variable. | |
1292 | ;; | |
d57da08b MD |
1293 | ;; This function is used in modules.c. |
1294 | ;; | |
0f2d19dd JB |
1295 | (define (module-make-local-var! m v) |
1296 | (or (let ((b (module-obarray-ref (module-obarray m) v))) | |
1777c18b MD |
1297 | (and (variable? b) |
1298 | (begin | |
d57da08b MD |
1299 | ;; Mark as modified since this function is called when |
1300 | ;; the standard eval closure defines a binding | |
1a961d7e | 1301 | (module-modified m) |
1777c18b | 1302 | b))) |
0f2d19dd JB |
1303 | (and (module-binder m) |
1304 | ((module-binder m) m v #t)) | |
1305 | (begin | |
296ff5e7 | 1306 | (let ((answer (make-undefined-variable))) |
d57da08b | 1307 | (module-add! m v answer) |
0f2d19dd JB |
1308 | answer)))) |
1309 | ||
89d06712 | 1310 | ;; module-ensure-local-variable! module symbol |
9540368e | 1311 | ;; |
89d06712 MV |
1312 | ;; Ensure that there is a local variable in MODULE for SYMBOL. If |
1313 | ;; there is no binding for SYMBOL, create a new uninitialized | |
1314 | ;; variable. Return the local variable. | |
9540368e | 1315 | ;; |
89d06712 MV |
1316 | (define (module-ensure-local-variable! module symbol) |
1317 | (or (module-local-variable module symbol) | |
9540368e | 1318 | (let ((var (make-undefined-variable))) |
9540368e MV |
1319 | (module-add! module symbol var) |
1320 | var))) | |
1321 | ||
0f2d19dd | 1322 | ;; module-add! module symbol var |
20edfbbd | 1323 | ;; |
0f2d19dd JB |
1324 | ;; ensure a particular variable for V in the local namespace of M. |
1325 | ;; | |
1326 | (define (module-add! m v var) | |
1327 | (if (not (variable? var)) | |
1328 | (error "Bad variable to module-add!" var)) | |
1777c18b | 1329 | (module-obarray-set! (module-obarray m) v var) |
1a961d7e | 1330 | (module-modified m)) |
0f2d19dd | 1331 | |
20edfbbd TTN |
1332 | ;; module-remove! |
1333 | ;; | |
0f2d19dd JB |
1334 | ;; make sure that a symbol is undefined in the local namespace of M. |
1335 | ;; | |
1336 | (define (module-remove! m v) | |
c35738c1 | 1337 | (module-obarray-remove! (module-obarray m) v) |
1a961d7e | 1338 | (module-modified m)) |
0f2d19dd JB |
1339 | |
1340 | (define (module-clear! m) | |
c35738c1 | 1341 | (hash-clear! (module-obarray m)) |
1a961d7e | 1342 | (module-modified m)) |
0f2d19dd JB |
1343 | |
1344 | ;; MODULE-FOR-EACH -- exported | |
20edfbbd | 1345 | ;; |
0f2d19dd JB |
1346 | ;; Call PROC on each symbol in MODULE, with arguments of (SYMBOL VARIABLE). |
1347 | ;; | |
1348 | (define (module-for-each proc module) | |
c35738c1 | 1349 | (hash-for-each proc (module-obarray module))) |
0f2d19dd JB |
1350 | |
1351 | (define (module-map proc module) | |
c35738c1 MD |
1352 | (hash-map proc (module-obarray module))) |
1353 | ||
0f2d19dd JB |
1354 | \f |
1355 | ||
1356 | ;;; {Low Level Bootstrapping} | |
1357 | ;;; | |
1358 | ||
20edfbbd | 1359 | ;; make-root-module |
0f2d19dd | 1360 | |
296ff5e7 MV |
1361 | ;; A root module uses the pre-modules-obarray as its obarray. This |
1362 | ;; special obarray accumulates all bindings that have been established | |
1363 | ;; before the module system is fully booted. | |
0f2d19dd | 1364 | ;; |
296ff5e7 MV |
1365 | ;; (The obarray continues to be used by code that has been closed over |
1366 | ;; before the module system has been booted.) | |
0f2d19dd JB |
1367 | |
1368 | (define (make-root-module) | |
296ff5e7 MV |
1369 | (let ((m (make-module 0))) |
1370 | (set-module-obarray! m (%get-pre-modules-obarray)) | |
1371 | m)) | |
0f2d19dd | 1372 | |
b622dec7 | 1373 | ;; make-scm-module |
0f2d19dd | 1374 | |
296ff5e7 MV |
1375 | ;; The root interface is a module that uses the same obarray as the |
1376 | ;; root module. It does not allow new definitions, tho. | |
0f2d19dd | 1377 | |
6906bd0d | 1378 | (define (make-scm-module) |
296ff5e7 MV |
1379 | (let ((m (make-module 0))) |
1380 | (set-module-obarray! m (%get-pre-modules-obarray)) | |
1381 | (set-module-eval-closure! m (standard-interface-eval-closure m)) | |
1382 | m)) | |
0f2d19dd JB |
1383 | |
1384 | ||
0f2d19dd JB |
1385 | \f |
1386 | ;;; {Module-based Loading} | |
1387 | ;;; | |
1388 | ||
1389 | (define (save-module-excursion thunk) | |
1390 | (let ((inner-module (current-module)) | |
1391 | (outer-module #f)) | |
1392 | (dynamic-wind (lambda () | |
1393 | (set! outer-module (current-module)) | |
1394 | (set-current-module inner-module) | |
1395 | (set! inner-module #f)) | |
1396 | thunk | |
1397 | (lambda () | |
1398 | (set! inner-module (current-module)) | |
1399 | (set-current-module outer-module) | |
1400 | (set! outer-module #f))))) | |
1401 | ||
0f2d19dd JB |
1402 | (define basic-load load) |
1403 | ||
c6775c40 MD |
1404 | (define (load-module filename) |
1405 | (save-module-excursion | |
1406 | (lambda () | |
1407 | (let ((oldname (and (current-load-port) | |
1408 | (port-filename (current-load-port))))) | |
1409 | (basic-load (if (and oldname | |
1410 | (> (string-length filename) 0) | |
1411 | (not (char=? (string-ref filename 0) #\/)) | |
1412 | (not (string=? (dirname oldname) "."))) | |
1413 | (string-append (dirname oldname) "/" filename) | |
1414 | filename)))))) | |
0f2d19dd JB |
1415 | |
1416 | ||
1417 | \f | |
44cf1f0f | 1418 | ;;; {MODULE-REF -- exported} |
0f2d19dd JB |
1419 | ;; |
1420 | ;; Returns the value of a variable called NAME in MODULE or any of its | |
1421 | ;; used modules. If there is no such variable, then if the optional third | |
1422 | ;; argument DEFAULT is present, it is returned; otherwise an error is signaled. | |
20edfbbd | 1423 | ;; |
0f2d19dd JB |
1424 | (define (module-ref module name . rest) |
1425 | (let ((variable (module-variable module name))) | |
1426 | (if (and variable (variable-bound? variable)) | |
1427 | (variable-ref variable) | |
1428 | (if (null? rest) | |
1429 | (error "No variable named" name 'in module) | |
1430 | (car rest) ; default value | |
1431 | )))) | |
1432 | ||
1433 | ;; MODULE-SET! -- exported | |
1434 | ;; | |
1435 | ;; Sets the variable called NAME in MODULE (or in a module that MODULE uses) | |
1436 | ;; to VALUE; if there is no such variable, an error is signaled. | |
20edfbbd | 1437 | ;; |
0f2d19dd JB |
1438 | (define (module-set! module name value) |
1439 | (let ((variable (module-variable module name))) | |
1440 | (if variable | |
1441 | (variable-set! variable value) | |
1442 | (error "No variable named" name 'in module)))) | |
1443 | ||
1444 | ;; MODULE-DEFINE! -- exported | |
1445 | ;; | |
1446 | ;; Sets the variable called NAME in MODULE to VALUE; if there is no such | |
1447 | ;; variable, it is added first. | |
20edfbbd | 1448 | ;; |
0f2d19dd JB |
1449 | (define (module-define! module name value) |
1450 | (let ((variable (module-local-variable module name))) | |
1451 | (if variable | |
1777c18b MD |
1452 | (begin |
1453 | (variable-set! variable value) | |
1a961d7e | 1454 | (module-modified module)) |
296ff5e7 | 1455 | (let ((variable (make-variable value))) |
296ff5e7 | 1456 | (module-add! module name variable))))) |
0f2d19dd | 1457 | |
ed218d98 MV |
1458 | ;; MODULE-DEFINED? -- exported |
1459 | ;; | |
1460 | ;; Return #t iff NAME is defined in MODULE (or in a module that MODULE | |
1461 | ;; uses) | |
1462 | ;; | |
1463 | (define (module-defined? module name) | |
1464 | (let ((variable (module-variable module name))) | |
1465 | (and variable (variable-bound? variable)))) | |
1466 | ||
0f2d19dd JB |
1467 | ;; MODULE-USE! module interface |
1468 | ;; | |
1469 | ;; Add INTERFACE to the list of interfaces used by MODULE. | |
20edfbbd | 1470 | ;; |
0f2d19dd JB |
1471 | (define (module-use! module interface) |
1472 | (set-module-uses! module | |
c614a00b MD |
1473 | (cons interface |
1474 | (filter (lambda (m) | |
1475 | (not (equal? (module-name m) | |
1476 | (module-name interface)))) | |
1477 | (module-uses module)))) | |
1a961d7e | 1478 | (module-modified module)) |
0f2d19dd | 1479 | |
7b07e5ef MD |
1480 | ;; MODULE-USE-INTERFACES! module interfaces |
1481 | ;; | |
1482 | ;; Same as MODULE-USE! but add multiple interfaces and check for duplicates | |
1483 | ;; | |
1484 | (define (module-use-interfaces! module interfaces) | |
8d8dac1f | 1485 | (let* ((duplicates-handlers? (or (module-duplicates-handlers module) |
70a459e3 | 1486 | (default-duplicate-binding-procedures))) |
7b07e5ef MD |
1487 | (uses (module-uses module))) |
1488 | ;; remove duplicates-interface | |
8d8dac1f | 1489 | (set! uses (delq! (module-duplicates-interface module) uses)) |
7b07e5ef MD |
1490 | ;; remove interfaces to be added |
1491 | (for-each (lambda (interface) | |
c614a00b MD |
1492 | (set! uses |
1493 | (filter (lambda (m) | |
1494 | (not (equal? (module-name m) | |
1495 | (module-name interface)))) | |
1496 | uses))) | |
7b07e5ef MD |
1497 | interfaces) |
1498 | ;; add interfaces to use list | |
1499 | (set-module-uses! module uses) | |
1500 | (for-each (lambda (interface) | |
1501 | (and duplicates-handlers? | |
1502 | ;; perform duplicate checking | |
1503 | (process-duplicates module interface)) | |
1504 | (set! uses (cons interface uses)) | |
1505 | (set-module-uses! module uses)) | |
1506 | interfaces) | |
1507 | ;; add duplicates interface | |
8d8dac1f MD |
1508 | (if (module-duplicates-interface module) |
1509 | (set-module-uses! module | |
1510 | (cons (module-duplicates-interface module) uses))) | |
7b07e5ef MD |
1511 | (module-modified module))) |
1512 | ||
0f2d19dd | 1513 | \f |
0f2d19dd JB |
1514 | ;;; {Recursive Namespaces} |
1515 | ;;; | |
1516 | ;;; | |
1517 | ;;; A hierarchical namespace emerges if we consider some module to be | |
1518 | ;;; root, and variables bound to modules as nested namespaces. | |
1519 | ;;; | |
1520 | ;;; The routines in this file manage variable names in hierarchical namespace. | |
1521 | ;;; Each variable name is a list of elements, looked up in successively nested | |
1522 | ;;; modules. | |
1523 | ;;; | |
0dd5491c | 1524 | ;;; (nested-ref some-root-module '(foo bar baz)) |
20edfbbd | 1525 | ;;; => <value of a variable named baz in the module bound to bar in |
0f2d19dd JB |
1526 | ;;; the module bound to foo in some-root-module> |
1527 | ;;; | |
1528 | ;;; | |
1529 | ;;; There are: | |
1530 | ;;; | |
1531 | ;;; ;; a-root is a module | |
1532 | ;;; ;; name is a list of symbols | |
1533 | ;;; | |
0dd5491c MD |
1534 | ;;; nested-ref a-root name |
1535 | ;;; nested-set! a-root name val | |
1536 | ;;; nested-define! a-root name val | |
1537 | ;;; nested-remove! a-root name | |
0f2d19dd JB |
1538 | ;;; |
1539 | ;;; | |
1540 | ;;; (current-module) is a natural choice for a-root so for convenience there are | |
1541 | ;;; also: | |
1542 | ;;; | |
0dd5491c MD |
1543 | ;;; local-ref name == nested-ref (current-module) name |
1544 | ;;; local-set! name val == nested-set! (current-module) name val | |
1545 | ;;; local-define! name val == nested-define! (current-module) name val | |
1546 | ;;; local-remove! name == nested-remove! (current-module) name | |
0f2d19dd JB |
1547 | ;;; |
1548 | ||
1549 | ||
0dd5491c | 1550 | (define (nested-ref root names) |
0f2d19dd JB |
1551 | (let loop ((cur root) |
1552 | (elts names)) | |
1553 | (cond | |
1554 | ((null? elts) cur) | |
1555 | ((not (module? cur)) #f) | |
1556 | (else (loop (module-ref cur (car elts) #f) (cdr elts)))))) | |
1557 | ||
0dd5491c | 1558 | (define (nested-set! root names val) |
0f2d19dd JB |
1559 | (let loop ((cur root) |
1560 | (elts names)) | |
1561 | (if (null? (cdr elts)) | |
1562 | (module-set! cur (car elts) val) | |
1563 | (loop (module-ref cur (car elts)) (cdr elts))))) | |
1564 | ||
0dd5491c | 1565 | (define (nested-define! root names val) |
0f2d19dd JB |
1566 | (let loop ((cur root) |
1567 | (elts names)) | |
1568 | (if (null? (cdr elts)) | |
1569 | (module-define! cur (car elts) val) | |
1570 | (loop (module-ref cur (car elts)) (cdr elts))))) | |
1571 | ||
0dd5491c | 1572 | (define (nested-remove! root names) |
0f2d19dd JB |
1573 | (let loop ((cur root) |
1574 | (elts names)) | |
1575 | (if (null? (cdr elts)) | |
1576 | (module-remove! cur (car elts)) | |
1577 | (loop (module-ref cur (car elts)) (cdr elts))))) | |
1578 | ||
0dd5491c MD |
1579 | (define (local-ref names) (nested-ref (current-module) names)) |
1580 | (define (local-set! names val) (nested-set! (current-module) names val)) | |
1581 | (define (local-define names val) (nested-define! (current-module) names val)) | |
1582 | (define (local-remove names) (nested-remove! (current-module) names)) | |
0f2d19dd JB |
1583 | |
1584 | ||
1585 | \f | |
8bb7330c | 1586 | ;;; {The (app) module} |
0f2d19dd JB |
1587 | ;;; |
1588 | ;;; The root of conventionally named objects not directly in the top level. | |
1589 | ;;; | |
8bb7330c JB |
1590 | ;;; (app modules) |
1591 | ;;; (app modules guile) | |
0f2d19dd JB |
1592 | ;;; |
1593 | ;;; The directory of all modules and the standard root module. | |
1594 | ;;; | |
1595 | ||
edc185c7 MD |
1596 | (define (module-public-interface m) |
1597 | (module-ref m '%module-public-interface #f)) | |
1598 | (define (set-module-public-interface! m i) | |
1599 | (module-define! m '%module-public-interface i)) | |
1600 | (define (set-system-module! m s) | |
1601 | (set-procedure-property! (module-eval-closure m) 'system-module s)) | |
0f2d19dd JB |
1602 | (define the-root-module (make-root-module)) |
1603 | (define the-scm-module (make-scm-module)) | |
1604 | (set-module-public-interface! the-root-module the-scm-module) | |
d5504515 MD |
1605 | (set-module-name! the-root-module '(guile)) |
1606 | (set-module-name! the-scm-module '(guile)) | |
1607 | (set-module-kind! the-scm-module 'interface) | |
edc185c7 | 1608 | (for-each set-system-module! (list the-root-module the-scm-module) '(#t #t)) |
0f2d19dd | 1609 | |
296ff5e7 MV |
1610 | ;; NOTE: This binding is used in libguile/modules.c. |
1611 | ;; | |
1612 | (define (make-modules-in module name) | |
1613 | (if (null? name) | |
1614 | module | |
1615 | (cond | |
1616 | ((module-ref module (car name) #f) | |
1617 | => (lambda (m) (make-modules-in m (cdr name)))) | |
1618 | (else (let ((m (make-module 31))) | |
1619 | (set-module-kind! m 'directory) | |
1620 | (set-module-name! m (append (or (module-name module) | |
1621 | '()) | |
1622 | (list (car name)))) | |
1623 | (module-define! module (car name) m) | |
1624 | (make-modules-in m (cdr name))))))) | |
0f2d19dd | 1625 | |
296ff5e7 MV |
1626 | (define (beautify-user-module! module) |
1627 | (let ((interface (module-public-interface module))) | |
1628 | (if (or (not interface) | |
1629 | (eq? interface module)) | |
1630 | (let ((interface (make-module 31))) | |
1631 | (set-module-name! interface (module-name module)) | |
1632 | (set-module-kind! interface 'interface) | |
8d8dac1f | 1633 | (set-module-public-interface! module interface)))) |
296ff5e7 MV |
1634 | (if (and (not (memq the-scm-module (module-uses module))) |
1635 | (not (eq? module the-root-module))) | |
7b07e5ef MD |
1636 | (set-module-uses! module |
1637 | (append (module-uses module) (list the-scm-module))))) | |
432558b9 | 1638 | |
1f60d9d2 MD |
1639 | ;; NOTE: This binding is used in libguile/modules.c. |
1640 | ;; | |
0209ca9a | 1641 | (define (resolve-module name . maybe-autoload) |
0f2d19dd | 1642 | (let ((full-name (append '(app modules) name))) |
0dd5491c | 1643 | (let ((already (local-ref full-name))) |
432558b9 MD |
1644 | (if already |
1645 | ;; The module already exists... | |
1646 | (if (and (or (null? maybe-autoload) (car maybe-autoload)) | |
fb1b76f4 | 1647 | (not (module-public-interface already))) |
432558b9 MD |
1648 | ;; ...but we are told to load and it doesn't contain source, so |
1649 | (begin | |
1650 | (try-load-module name) | |
1651 | already) | |
1652 | ;; simply return it. | |
1653 | already) | |
3e3cec45 | 1654 | (begin |
432558b9 | 1655 | ;; Try to autoload it if we are told so |
3e3cec45 | 1656 | (if (or (null? maybe-autoload) (car maybe-autoload)) |
432558b9 MD |
1657 | (try-load-module name)) |
1658 | ;; Get/create it. | |
3e3cec45 | 1659 | (make-modules-in (current-module) full-name)))))) |
20edfbbd | 1660 | |
d866f445 MV |
1661 | ;; Cheat. These bindings are needed by modules.c, but we don't want |
1662 | ;; to move their real definition here because that would be unnatural. | |
1663 | ;; | |
296ff5e7 | 1664 | (define try-module-autoload #f) |
d866f445 MV |
1665 | (define process-define-module #f) |
1666 | (define process-use-modules #f) | |
1667 | (define module-export! #f) | |
296ff5e7 MV |
1668 | |
1669 | ;; This boots the module system. All bindings needed by modules.c | |
1670 | ;; must have been defined by now. | |
1671 | ;; | |
1672 | (set-current-module the-root-module) | |
1673 | ||
1674 | (define app (make-module 31)) | |
1675 | (local-define '(app modules) (make-module 31)) | |
1676 | (local-define '(app modules guile) the-root-module) | |
1677 | ||
1678 | ;; (define-special-value '(app modules new-ws) (lambda () (make-scm-module))) | |
1679 | ||
1680 | (define (try-load-module name) | |
8c494e99 | 1681 | (try-module-autoload name)) |
0f2d19dd | 1682 | |
90847923 MD |
1683 | (define (purify-module! module) |
1684 | "Removes bindings in MODULE which are inherited from the (guile) module." | |
1685 | (let ((use-list (module-uses module))) | |
1686 | (if (and (pair? use-list) | |
1687 | (eq? (car (last-pair use-list)) the-scm-module)) | |
1688 | (set-module-uses! module (reverse (cdr (reverse use-list))))))) | |
1689 | ||
4eecfeb7 | 1690 | ;; Return a module that is an interface to the module designated by |
532cf805 MV |
1691 | ;; NAME. |
1692 | ;; | |
c614a00b | 1693 | ;; `resolve-interface' takes four keyword arguments: |
532cf805 MV |
1694 | ;; |
1695 | ;; #:select SELECTION | |
1696 | ;; | |
1697 | ;; SELECTION is a list of binding-specs to be imported; A binding-spec | |
1698 | ;; is either a symbol or a pair of symbols (ORIG . SEEN), where ORIG | |
1699 | ;; is the name in the used module and SEEN is the name in the using | |
1700 | ;; module. Note that SEEN is also passed through RENAMER, below. The | |
1701 | ;; default is to select all bindings. If you specify no selection but | |
4eecfeb7 | 1702 | ;; a renamer, only the bindings that already exist in the used module |
532cf805 MV |
1703 | ;; are made available in the interface. Bindings that are added later |
1704 | ;; are not picked up. | |
1705 | ;; | |
c614a00b | 1706 | ;; #:hide BINDINGS |
532cf805 | 1707 | ;; |
c614a00b | 1708 | ;; BINDINGS is a list of bindings which should not be imported. |
f595ccfe MD |
1709 | ;; |
1710 | ;; #:prefix PREFIX | |
1711 | ;; | |
1712 | ;; PREFIX is a symbol that will be appended to each exported name. | |
1713 | ;; The default is to not perform any renaming. | |
532cf805 | 1714 | ;; |
c614a00b MD |
1715 | ;; #:renamer RENAMER |
1716 | ;; | |
1717 | ;; RENAMER is a procedure that takes a symbol and returns its new | |
1718 | ;; name. The default is not perform any renaming. | |
1719 | ;; | |
532cf805 MV |
1720 | ;; Signal "no code for module" error if module name is not resolvable |
1721 | ;; or its public interface is not available. Signal "no binding" | |
1722 | ;; error if selected binding does not exist in the used module. | |
1723 | ;; | |
1724 | (define (resolve-interface name . args) | |
1725 | ||
1726 | (define (get-keyword-arg args kw def) | |
1727 | (cond ((memq kw args) | |
1728 | => (lambda (kw-arg) | |
1729 | (if (null? (cdr kw-arg)) | |
1730 | (error "keyword without value: " kw)) | |
1731 | (cadr kw-arg))) | |
1732 | (else | |
1733 | def))) | |
1734 | ||
1735 | (let* ((select (get-keyword-arg args #:select #f)) | |
c614a00b | 1736 | (hide (get-keyword-arg args #:hide '())) |
f595ccfe MD |
1737 | (renamer (or (get-keyword-arg args #:renamer #f) |
1738 | (let ((prefix (get-keyword-arg args #:prefix #f))) | |
1739 | (and prefix (symbol-prefix-proc prefix))) | |
1740 | identity)) | |
b622dec7 TTN |
1741 | (module (resolve-module name)) |
1742 | (public-i (and module (module-public-interface module)))) | |
1743 | (and (or (not module) (not public-i)) | |
1744 | (error "no code for module" name)) | |
c614a00b | 1745 | (if (and (not select) (null? hide) (eq? renamer identity)) |
b622dec7 | 1746 | public-i |
532cf805 MV |
1747 | (let ((selection (or select (module-map (lambda (sym var) sym) |
1748 | public-i))) | |
b622dec7 | 1749 | (custom-i (make-module 31))) |
c614a00b MD |
1750 | (set-module-kind! custom-i 'custom-interface) |
1751 | (set-module-name! custom-i name) | |
532cf805 MV |
1752 | ;; XXX - should use a lazy binder so that changes to the |
1753 | ;; used module are picked up automatically. | |
d57da08b MD |
1754 | (for-each (lambda (bspec) |
1755 | (let* ((direct? (symbol? bspec)) | |
1756 | (orig (if direct? bspec (car bspec))) | |
1757 | (seen (if direct? bspec (cdr bspec))) | |
c614a00b MD |
1758 | (var (or (module-local-variable public-i orig) |
1759 | (module-local-variable module orig) | |
1760 | (error | |
1761 | ;; fixme: format manually for now | |
1762 | (simple-format | |
1763 | #f "no binding `~A' in module ~A" | |
1764 | orig name))))) | |
1765 | (if (memq orig hide) | |
1766 | (set! hide (delq! orig hide)) | |
1767 | (module-add! custom-i | |
1768 | (renamer seen) | |
1769 | var)))) | |
d57da08b | 1770 | selection) |
c614a00b MD |
1771 | ;; Check that we are not hiding bindings which don't exist |
1772 | (for-each (lambda (binding) | |
1773 | (if (not (module-local-variable public-i binding)) | |
1774 | (error | |
1775 | (simple-format | |
1776 | #f "no binding `~A' to hide in module ~A" | |
1777 | binding name)))) | |
1778 | hide) | |
b622dec7 | 1779 | custom-i)))) |
fb1b76f4 TTN |
1780 | |
1781 | (define (symbol-prefix-proc prefix) | |
1782 | (lambda (symbol) | |
1783 | (symbol-append prefix symbol))) | |
0f2d19dd | 1784 | |
482a28f9 MV |
1785 | ;; This function is called from "modules.c". If you change it, be |
1786 | ;; sure to update "modules.c" as well. | |
1787 | ||
0f2d19dd | 1788 | (define (process-define-module args) |
f8a502cb TTN |
1789 | (let* ((module-id (car args)) |
1790 | (module (resolve-module module-id #f)) | |
1791 | (kws (cdr args)) | |
1792 | (unrecognized (lambda (arg) | |
1793 | (error "unrecognized define-module argument" arg)))) | |
0f2d19dd | 1794 | (beautify-user-module! module) |
0209ca9a | 1795 | (let loop ((kws kws) |
44484f52 | 1796 | (reversed-interfaces '()) |
5d20b8c7 | 1797 | (exports '()) |
f595ccfe MD |
1798 | (re-exports '()) |
1799 | (replacements '())) | |
0209ca9a | 1800 | (if (null? kws) |
d57da08b MD |
1801 | (call-with-deferred-observers |
1802 | (lambda () | |
1803 | (module-use-interfaces! module (reverse reversed-interfaces)) | |
1804 | (module-export! module exports) | |
1805 | (module-replace! module replacements) | |
1806 | (module-re-export! module re-exports))) | |
532cf805 MV |
1807 | (case (car kws) |
1808 | ((#:use-module #:use-syntax) | |
1809 | (or (pair? (cdr kws)) | |
1810 | (unrecognized kws)) | |
1811 | (let* ((interface-args (cadr kws)) | |
1812 | (interface (apply resolve-interface interface-args))) | |
88c4ba2a KN |
1813 | (and (eq? (car kws) #:use-syntax) |
1814 | (or (symbol? (caar interface-args)) | |
532cf805 | 1815 | (error "invalid module name for use-syntax" |
88c4ba2a | 1816 | (car interface-args))) |
532cf805 MV |
1817 | (set-module-transformer! |
1818 | module | |
88c4ba2a KN |
1819 | (module-ref interface |
1820 | (car (last-pair (car interface-args))) | |
532cf805 | 1821 | #f))) |
44484f52 | 1822 | (loop (cddr kws) |
532cf805 | 1823 | (cons interface reversed-interfaces) |
5d20b8c7 | 1824 | exports |
f595ccfe MD |
1825 | re-exports |
1826 | replacements))) | |
532cf805 MV |
1827 | ((#:autoload) |
1828 | (or (and (pair? (cdr kws)) (pair? (cddr kws))) | |
1829 | (unrecognized kws)) | |
1830 | (loop (cdddr kws) | |
1831 | (cons (make-autoload-interface module | |
1832 | (cadr kws) | |
1833 | (caddr kws)) | |
1834 | reversed-interfaces) | |
5d20b8c7 | 1835 | exports |
f595ccfe MD |
1836 | re-exports |
1837 | replacements)) | |
532cf805 MV |
1838 | ((#:no-backtrace) |
1839 | (set-system-module! module #t) | |
f595ccfe | 1840 | (loop (cdr kws) reversed-interfaces exports re-exports replacements)) |
532cf805 MV |
1841 | ((#:pure) |
1842 | (purify-module! module) | |
f595ccfe | 1843 | (loop (cdr kws) reversed-interfaces exports re-exports replacements)) |
7b07e5ef MD |
1844 | ((#:duplicates) |
1845 | (if (not (pair? (cdr kws))) | |
1846 | (unrecognized kws)) | |
8d8dac1f MD |
1847 | (set-module-duplicates-handlers! |
1848 | module | |
1849 | (lookup-duplicates-handlers (cadr kws))) | |
f595ccfe | 1850 | (loop (cddr kws) reversed-interfaces exports re-exports replacements)) |
39819fa9 | 1851 | ((#:export #:export-syntax) |
532cf805 MV |
1852 | (or (pair? (cdr kws)) |
1853 | (unrecognized kws)) | |
1854 | (loop (cddr kws) | |
1855 | reversed-interfaces | |
5d20b8c7 | 1856 | (append (cadr kws) exports) |
f595ccfe MD |
1857 | re-exports |
1858 | replacements)) | |
39819fa9 | 1859 | ((#:re-export #:re-export-syntax) |
5d20b8c7 MD |
1860 | (or (pair? (cdr kws)) |
1861 | (unrecognized kws)) | |
1862 | (loop (cddr kws) | |
1863 | reversed-interfaces | |
1864 | exports | |
f595ccfe MD |
1865 | (append (cadr kws) re-exports) |
1866 | replacements)) | |
1867 | ((#:replace #:replace-syntax) | |
1868 | (or (pair? (cdr kws)) | |
1869 | (unrecognized kws)) | |
1870 | (loop (cddr kws) | |
1871 | reversed-interfaces | |
1872 | exports | |
1873 | re-exports | |
1874 | (append (cadr kws) replacements))) | |
532cf805 MV |
1875 | (else |
1876 | (unrecognized kws))))) | |
db853761 | 1877 | (run-hook module-defined-hook module) |
0f2d19dd | 1878 | module)) |
71225060 | 1879 | |
db853761 NJ |
1880 | ;; `module-defined-hook' is a hook that is run whenever a new module |
1881 | ;; is defined. Its members are called with one argument, the new | |
1882 | ;; module. | |
1883 | (define module-defined-hook (make-hook 1)) | |
1884 | ||
71225060 MD |
1885 | ;;; {Autoload} |
1886 | ||
1887 | (define (make-autoload-interface module name bindings) | |
1888 | (let ((b (lambda (a sym definep) | |
1889 | (and (memq sym bindings) | |
1890 | (let ((i (module-public-interface (resolve-module name)))) | |
1891 | (if (not i) | |
1892 | (error "missing interface for module" name)) | |
1893 | ;; Replace autoload-interface with interface | |
1894 | (set-car! (memq a (module-uses module)) i) | |
1895 | (module-local-variable i sym)))))) | |
8d8dac1f | 1896 | (module-constructor #() '() b #f #f name 'autoload #f #f |
6b64c19b | 1897 | '() (make-weak-value-hash-table 31) 0))) |
71225060 | 1898 | |
ff5546f5 KN |
1899 | ;;; {Compiled module} |
1900 | ||
1901 | (define load-compiled #f) | |
1902 | ||
0f2d19dd | 1903 | \f |
44cf1f0f | 1904 | ;;; {Autoloading modules} |
0f2d19dd JB |
1905 | |
1906 | (define autoloads-in-progress '()) | |
1907 | ||
482a28f9 MV |
1908 | ;; This function is called from "modules.c". If you change it, be |
1909 | ;; sure to update "modules.c" as well. | |
1910 | ||
0f2d19dd | 1911 | (define (try-module-autoload module-name) |
0f2d19dd | 1912 | (let* ((reverse-name (reverse module-name)) |
06f0414c | 1913 | (name (symbol->string (car reverse-name))) |
0f2d19dd | 1914 | (dir-hint-module-name (reverse (cdr reverse-name))) |
06f0414c MD |
1915 | (dir-hint (apply string-append |
1916 | (map (lambda (elt) | |
1917 | (string-append (symbol->string elt) "/")) | |
1918 | dir-hint-module-name)))) | |
0209ca9a | 1919 | (resolve-module dir-hint-module-name #f) |
0f2d19dd JB |
1920 | (and (not (autoload-done-or-in-progress? dir-hint name)) |
1921 | (let ((didit #f)) | |
ff5546f5 KN |
1922 | (define (load-file proc file) |
1923 | (save-module-excursion (lambda () (proc file))) | |
1924 | (set! didit #t)) | |
0f2d19dd JB |
1925 | (dynamic-wind |
1926 | (lambda () (autoload-in-progress! dir-hint name)) | |
defed517 | 1927 | (lambda () |
ff5546f5 KN |
1928 | (let ((file (in-vicinity dir-hint name))) |
1929 | (cond ((and load-compiled | |
1930 | (%search-load-path (string-append file ".go"))) | |
1931 | => (lambda (full) | |
1932 | (load-file load-compiled full))) | |
1933 | ((%search-load-path file) | |
1934 | => (lambda (full) | |
1935 | (load-file primitive-load full)))))) | |
0f2d19dd JB |
1936 | (lambda () (set-autoloaded! dir-hint name didit))) |
1937 | didit)))) | |
1938 | ||
71225060 | 1939 | \f |
d0cbd20c MV |
1940 | ;;; Dynamic linking of modules |
1941 | ||
0f2d19dd JB |
1942 | (define autoloads-done '((guile . guile))) |
1943 | ||
1944 | (define (autoload-done-or-in-progress? p m) | |
1945 | (let ((n (cons p m))) | |
1946 | (->bool (or (member n autoloads-done) | |
1947 | (member n autoloads-in-progress))))) | |
1948 | ||
1949 | (define (autoload-done! p m) | |
1950 | (let ((n (cons p m))) | |
1951 | (set! autoloads-in-progress | |
1952 | (delete! n autoloads-in-progress)) | |
1953 | (or (member n autoloads-done) | |
1954 | (set! autoloads-done (cons n autoloads-done))))) | |
1955 | ||
1956 | (define (autoload-in-progress! p m) | |
1957 | (let ((n (cons p m))) | |
1958 | (set! autoloads-done | |
1959 | (delete! n autoloads-done)) | |
1960 | (set! autoloads-in-progress (cons n autoloads-in-progress)))) | |
1961 | ||
1962 | (define (set-autoloaded! p m done?) | |
1963 | (if done? | |
1964 | (autoload-done! p m) | |
1965 | (let ((n (cons p m))) | |
1966 | (set! autoloads-done (delete! n autoloads-done)) | |
1967 | (set! autoloads-in-progress (delete! n autoloads-in-progress))))) | |
1968 | ||
1969 | ||
1970 | ||
a54e6fa3 KN |
1971 | \f |
1972 | ;; {EVAL-CASE} | |
1973 | ;; | |
1974 | ;; (eval-case ((situation*) forms)* (else forms)?) | |
1975 | ;; | |
1976 | ;; Evaluate certain code based on the situation that eval-case is used | |
1977 | ;; in. The only defined situation right now is `load-toplevel' which | |
1978 | ;; triggers for code evaluated at the top-level, for example from the | |
1979 | ;; REPL or when loading a file. | |
20edfbbd | 1980 | |
a54e6fa3 KN |
1981 | (define eval-case |
1982 | (procedure->memoizing-macro | |
1983 | (lambda (exp env) | |
1984 | (define (toplevel-env? env) | |
1985 | (or (not (pair? env)) (not (pair? (car env))))) | |
1986 | (define (syntax) | |
1987 | (error "syntax error in eval-case")) | |
1988 | (let loop ((clauses (cdr exp))) | |
20edfbbd | 1989 | (cond |
a54e6fa3 KN |
1990 | ((null? clauses) |
1991 | #f) | |
1992 | ((not (list? (car clauses))) | |
1993 | (syntax)) | |
1994 | ((eq? 'else (caar clauses)) | |
1995 | (or (null? (cdr clauses)) | |
1996 | (syntax)) | |
1997 | (cons 'begin (cdar clauses))) | |
1998 | ((not (list? (caar clauses))) | |
1999 | (syntax)) | |
2000 | ((and (toplevel-env? env) | |
2001 | (memq 'load-toplevel (caar clauses))) | |
2002 | (cons 'begin (cdar clauses))) | |
2003 | (else | |
2004 | (loop (cdr clauses)))))))) | |
0f2d19dd JB |
2005 | |
2006 | \f | |
2007 | ;;; {Macros} | |
2008 | ;;; | |
2009 | ||
7a0ff2f8 MD |
2010 | (define (primitive-macro? m) |
2011 | (and (macro? m) | |
2012 | (not (macro-transformer m)))) | |
2013 | ||
2014 | ;;; {Defmacros} | |
2015 | ;;; | |
231a4ea8 MD |
2016 | (define macro-table (make-weak-key-hash-table 61)) |
2017 | (define xformer-table (make-weak-key-hash-table 61)) | |
0f2d19dd JB |
2018 | |
2019 | (define (defmacro? m) (hashq-ref macro-table m)) | |
2020 | (define (assert-defmacro?! m) (hashq-set! macro-table m #t)) | |
2021 | (define (defmacro-transformer m) (hashq-ref xformer-table m)) | |
2022 | (define (set-defmacro-transformer! m t) (hashq-set! xformer-table m t)) | |
2023 | ||
2024 | (define defmacro:transformer | |
2025 | (lambda (f) | |
2026 | (let* ((xform (lambda (exp env) | |
2027 | (copy-tree (apply f (cdr exp))))) | |
2028 | (a (procedure->memoizing-macro xform))) | |
2029 | (assert-defmacro?! a) | |
2030 | (set-defmacro-transformer! a f) | |
2031 | a))) | |
2032 | ||
2033 | ||
2034 | (define defmacro | |
2035 | (let ((defmacro-transformer | |
2036 | (lambda (name parms . body) | |
2037 | (let ((transformer `(lambda ,parms ,@body))) | |
8add1522 KN |
2038 | `(eval-case |
2039 | ((load-toplevel) | |
2040 | (define ,name (defmacro:transformer ,transformer))) | |
2041 | (else | |
2042 | (error "defmacro can only be used at the top level"))))))) | |
0f2d19dd JB |
2043 | (defmacro:transformer defmacro-transformer))) |
2044 | ||
2045 | (define defmacro:syntax-transformer | |
2046 | (lambda (f) | |
2047 | (procedure->syntax | |
2048 | (lambda (exp env) | |
2049 | (copy-tree (apply f (cdr exp))))))) | |
2050 | ||
ed218d98 MV |
2051 | |
2052 | ;; XXX - should the definition of the car really be looked up in the | |
2053 | ;; current module? | |
2054 | ||
0f2d19dd JB |
2055 | (define (macroexpand-1 e) |
2056 | (cond | |
2057 | ((pair? e) (let* ((a (car e)) | |
ed218d98 | 2058 | (val (and (symbol? a) (local-ref (list a))))) |
0f2d19dd JB |
2059 | (if (defmacro? val) |
2060 | (apply (defmacro-transformer val) (cdr e)) | |
2061 | e))) | |
2062 | (#t e))) | |
2063 | ||
2064 | (define (macroexpand e) | |
2065 | (cond | |
2066 | ((pair? e) (let* ((a (car e)) | |
ed218d98 | 2067 | (val (and (symbol? a) (local-ref (list a))))) |
0f2d19dd JB |
2068 | (if (defmacro? val) |
2069 | (macroexpand (apply (defmacro-transformer val) (cdr e))) | |
2070 | e))) | |
2071 | (#t e))) | |
2072 | ||
534a0099 | 2073 | (provide 'defmacro) |
0f2d19dd JB |
2074 | |
2075 | \f | |
2076 | ||
83b38198 MD |
2077 | ;;; {Run-time options} |
2078 | ||
e9bab9df DH |
2079 | (define define-option-interface |
2080 | (let* ((option-name car) | |
2081 | (option-value cadr) | |
2082 | (option-documentation caddr) | |
2083 | ||
2084 | (print-option (lambda (option) | |
2085 | (display (option-name option)) | |
2086 | (if (< (string-length | |
2087 | (symbol->string (option-name option))) | |
2088 | 8) | |
2089 | (display #\tab)) | |
2090 | (display #\tab) | |
2091 | (display (option-value option)) | |
2092 | (display #\tab) | |
2093 | (display (option-documentation option)) | |
2094 | (newline))) | |
2095 | ||
2096 | ;; Below follow the macros defining the run-time option interfaces. | |
2097 | ||
2098 | (make-options (lambda (interface) | |
2099 | `(lambda args | |
2100 | (cond ((null? args) (,interface)) | |
2101 | ((list? (car args)) | |
2102 | (,interface (car args)) (,interface)) | |
2103 | (else (for-each ,print-option | |
2104 | (,interface #t))))))) | |
2105 | ||
2106 | (make-enable (lambda (interface) | |
83b38198 | 2107 | `(lambda flags |
e9bab9df DH |
2108 | (,interface (append flags (,interface))) |
2109 | (,interface)))) | |
2110 | ||
2111 | (make-disable (lambda (interface) | |
2112 | `(lambda flags | |
2113 | (let ((options (,interface))) | |
2114 | (for-each (lambda (flag) | |
2115 | (set! options (delq! flag options))) | |
2116 | flags) | |
2117 | (,interface options) | |
0983f67f | 2118 | (,interface)))))) |
7c38399f | 2119 | (procedure->memoizing-macro |
83b38198 | 2120 | (lambda (exp env) |
0983f67f NJ |
2121 | (let* ((option-group (cadr exp)) |
2122 | (interface (car option-group)) | |
2123 | (options/enable/disable (cadr option-group))) | |
2124 | `(begin | |
2125 | (define ,(car options/enable/disable) | |
2126 | ,(make-options interface)) | |
2127 | (define ,(cadr options/enable/disable) | |
2128 | ,(make-enable interface)) | |
2129 | (define ,(caddr options/enable/disable) | |
2130 | ,(make-disable interface)) | |
2131 | (defmacro ,(caaddr option-group) (opt val) | |
2132 | `(,,(car options/enable/disable) | |
3f619266 NJ |
2133 | (append (,,(car options/enable/disable)) |
2134 | (list ',opt ,val)))))))))) | |
e9bab9df DH |
2135 | |
2136 | (define-option-interface | |
2137 | (eval-options-interface | |
2138 | (eval-options eval-enable eval-disable) | |
2139 | (eval-set!))) | |
2140 | ||
2141 | (define-option-interface | |
2142 | (debug-options-interface | |
2143 | (debug-options debug-enable debug-disable) | |
2144 | (debug-set!))) | |
2145 | ||
2146 | (define-option-interface | |
2147 | (evaluator-traps-interface | |
2148 | (traps trap-enable trap-disable) | |
2149 | (trap-set!))) | |
2150 | ||
2151 | (define-option-interface | |
2152 | (read-options-interface | |
2153 | (read-options read-enable read-disable) | |
2154 | (read-set!))) | |
2155 | ||
2156 | (define-option-interface | |
2157 | (print-options-interface | |
2158 | (print-options print-enable print-disable) | |
2159 | (print-set!))) | |
83b38198 MD |
2160 | |
2161 | \f | |
2162 | ||
0f2d19dd JB |
2163 | ;;; {Running Repls} |
2164 | ;;; | |
2165 | ||
2166 | (define (repl read evaler print) | |
75a97b92 | 2167 | (let loop ((source (read (current-input-port)))) |
0f2d19dd | 2168 | (print (evaler source)) |
75a97b92 | 2169 | (loop (read (current-input-port))))) |
0f2d19dd JB |
2170 | |
2171 | ;; A provisional repl that acts like the SCM repl: | |
2172 | ;; | |
2173 | (define scm-repl-silent #f) | |
2174 | (define (assert-repl-silence v) (set! scm-repl-silent v)) | |
2175 | ||
21ed9efe MD |
2176 | (define *unspecified* (if #f #f)) |
2177 | (define (unspecified? v) (eq? v *unspecified*)) | |
2178 | ||
2179 | (define scm-repl-print-unspecified #f) | |
2180 | (define (assert-repl-print-unspecified v) (set! scm-repl-print-unspecified v)) | |
2181 | ||
79451588 | 2182 | (define scm-repl-verbose #f) |
0f2d19dd JB |
2183 | (define (assert-repl-verbosity v) (set! scm-repl-verbose v)) |
2184 | ||
e6875011 | 2185 | (define scm-repl-prompt "guile> ") |
0f2d19dd | 2186 | |
e6875011 MD |
2187 | (define (set-repl-prompt! v) (set! scm-repl-prompt v)) |
2188 | ||
d5d34fa1 MD |
2189 | (define (default-lazy-handler key . args) |
2190 | (save-stack lazy-handler-dispatch) | |
2191 | (apply throw key args)) | |
2192 | ||
d5d34fa1 | 2193 | (define (lazy-handler-dispatch key . args) |
d95c0b76 | 2194 | (apply default-lazy-handler key args)) |
0f2d19dd | 2195 | |
3e3cec45 | 2196 | (define abort-hook (make-hook)) |
59e1116d | 2197 | |
28d8ab3c GH |
2198 | ;; these definitions are used if running a script. |
2199 | ;; otherwise redefined in error-catching-loop. | |
2200 | (define (set-batch-mode?! arg) #t) | |
2201 | (define (batch-mode?) #t) | |
4bbbcd5c | 2202 | |
0f2d19dd | 2203 | (define (error-catching-loop thunk) |
4bbbcd5c GH |
2204 | (let ((status #f) |
2205 | (interactive #t)) | |
8e44e7a0 | 2206 | (define (loop first) |
20edfbbd | 2207 | (let ((next |
8e44e7a0 | 2208 | (catch #t |
9a0d70e2 | 2209 | |
8e44e7a0 GH |
2210 | (lambda () |
2211 | (lazy-catch #t | |
2212 | (lambda () | |
bb00edfa | 2213 | (call-with-unblocked-asyncs |
8e44e7a0 | 2214 | (lambda () |
45456413 MD |
2215 | (with-traps |
2216 | (lambda () | |
2217 | (first) | |
20edfbbd | 2218 | |
45456413 MD |
2219 | ;; This line is needed because mark |
2220 | ;; doesn't do closures quite right. | |
2221 | ;; Unreferenced locals should be | |
2222 | ;; collected. | |
2223 | ;; | |
2224 | (set! first #f) | |
2225 | (let loop ((v (thunk))) | |
2226 | (loop (thunk))) | |
bb00edfa | 2227 | #f))))) |
8e44e7a0 GH |
2228 | |
2229 | lazy-handler-dispatch)) | |
20edfbbd | 2230 | |
8e44e7a0 GH |
2231 | (lambda (key . args) |
2232 | (case key | |
2233 | ((quit) | |
8e44e7a0 GH |
2234 | (set! status args) |
2235 | #f) | |
2236 | ||
2237 | ((switch-repl) | |
2238 | (apply throw 'switch-repl args)) | |
2239 | ||
2240 | ((abort) | |
2241 | ;; This is one of the closures that require | |
2242 | ;; (set! first #f) above | |
2243 | ;; | |
2244 | (lambda () | |
04efd24d | 2245 | (run-hook abort-hook) |
e13c54c4 | 2246 | (force-output (current-output-port)) |
8e44e7a0 GH |
2247 | (display "ABORT: " (current-error-port)) |
2248 | (write args (current-error-port)) | |
2249 | (newline (current-error-port)) | |
4bbbcd5c | 2250 | (if interactive |
e13c54c4 JB |
2251 | (begin |
2252 | (if (and | |
2253 | (not has-shown-debugger-hint?) | |
2254 | (not (memq 'backtrace | |
2255 | (debug-options-interface))) | |
2256 | (stack? (fluid-ref the-last-stack))) | |
2257 | (begin | |
2258 | (newline (current-error-port)) | |
2259 | (display | |
cb546c61 | 2260 | "Type \"(backtrace)\" to get more information or \"(debug)\" to enter the debugger.\n" |
e13c54c4 JB |
2261 | (current-error-port)) |
2262 | (set! has-shown-debugger-hint? #t))) | |
2263 | (force-output (current-error-port))) | |
2264 | (begin | |
2265 | (primitive-exit 1))) | |
8e44e7a0 GH |
2266 | (set! stack-saved? #f))) |
2267 | ||
2268 | (else | |
2269 | ;; This is the other cons-leak closure... | |
2270 | (lambda () | |
2271 | (cond ((= (length args) 4) | |
2272 | (apply handle-system-error key args)) | |
2273 | (else | |
2274 | (apply bad-throw key args)))))))))) | |
2275 | (if next (loop next) status))) | |
5f5f2642 | 2276 | (set! set-batch-mode?! (lambda (arg) |
20edfbbd | 2277 | (cond (arg |
5f5f2642 MD |
2278 | (set! interactive #f) |
2279 | (restore-signals)) | |
2280 | (#t | |
2281 | (error "sorry, not implemented"))))) | |
2282 | (set! batch-mode? (lambda () (not interactive))) | |
bb00edfa MV |
2283 | (call-with-blocked-asyncs |
2284 | (lambda () (loop (lambda () #t)))))) | |
0f2d19dd | 2285 | |
8bb7f646 | 2286 | ;;(define the-last-stack (make-fluid)) Defined by scm_init_backtrace () |
8087b6be | 2287 | (define before-signal-stack (make-fluid)) |
21ed9efe MD |
2288 | (define stack-saved? #f) |
2289 | ||
2290 | (define (save-stack . narrowing) | |
edc185c7 MD |
2291 | (or stack-saved? |
2292 | (cond ((not (memq 'debug (debug-options-interface))) | |
2293 | (fluid-set! the-last-stack #f) | |
2294 | (set! stack-saved? #t)) | |
2295 | (else | |
2296 | (fluid-set! | |
2297 | the-last-stack | |
2298 | (case (stack-id #t) | |
2299 | ((repl-stack) | |
704f4e86 | 2300 | (apply make-stack #t save-stack primitive-eval #t 0 narrowing)) |
edc185c7 MD |
2301 | ((load-stack) |
2302 | (apply make-stack #t save-stack 0 #t 0 narrowing)) | |
2303 | ((tk-stack) | |
2304 | (apply make-stack #t save-stack tk-stack-mark #t 0 narrowing)) | |
2305 | ((#t) | |
2306 | (apply make-stack #t save-stack 0 1 narrowing)) | |
2307 | (else | |
2308 | (let ((id (stack-id #t))) | |
2309 | (and (procedure? id) | |
2310 | (apply make-stack #t save-stack id #t 0 narrowing)))))) | |
2311 | (set! stack-saved? #t))))) | |
1c6cd8e8 | 2312 | |
3e3cec45 MD |
2313 | (define before-error-hook (make-hook)) |
2314 | (define after-error-hook (make-hook)) | |
2315 | (define before-backtrace-hook (make-hook)) | |
2316 | (define after-backtrace-hook (make-hook)) | |
1c6cd8e8 | 2317 | |
21ed9efe MD |
2318 | (define has-shown-debugger-hint? #f) |
2319 | ||
35c5db87 GH |
2320 | (define (handle-system-error key . args) |
2321 | (let ((cep (current-error-port))) | |
8bb7f646 | 2322 | (cond ((not (stack? (fluid-ref the-last-stack)))) |
21ed9efe | 2323 | ((memq 'backtrace (debug-options-interface)) |
04efd24d | 2324 | (run-hook before-backtrace-hook) |
21ed9efe | 2325 | (newline cep) |
755457ec | 2326 | (display "Backtrace:\n") |
8bb7f646 | 2327 | (display-backtrace (fluid-ref the-last-stack) cep) |
21ed9efe | 2328 | (newline cep) |
04efd24d MD |
2329 | (run-hook after-backtrace-hook))) |
2330 | (run-hook before-error-hook) | |
8bb7f646 | 2331 | (apply display-error (fluid-ref the-last-stack) cep args) |
04efd24d | 2332 | (run-hook after-error-hook) |
35c5db87 GH |
2333 | (force-output cep) |
2334 | (throw 'abort key))) | |
21ed9efe | 2335 | |
0f2d19dd JB |
2336 | (define (quit . args) |
2337 | (apply throw 'quit args)) | |
2338 | ||
7950df7c GH |
2339 | (define exit quit) |
2340 | ||
d590bbf6 MD |
2341 | ;;(define has-shown-backtrace-hint? #f) Defined by scm_init_backtrace () |
2342 | ||
2343 | ;; Replaced by C code: | |
2344 | ;;(define (backtrace) | |
8bb7f646 | 2345 | ;; (if (fluid-ref the-last-stack) |
d590bbf6 MD |
2346 | ;; (begin |
2347 | ;; (newline) | |
8bb7f646 | 2348 | ;; (display-backtrace (fluid-ref the-last-stack) (current-output-port)) |
d590bbf6 MD |
2349 | ;; (newline) |
2350 | ;; (if (and (not has-shown-backtrace-hint?) | |
2351 | ;; (not (memq 'backtrace (debug-options-interface)))) | |
2352 | ;; (begin | |
2353 | ;; (display | |
2354 | ;;"Type \"(debug-enable 'backtrace)\" if you would like a backtrace | |
2355 | ;;automatically if an error occurs in the future.\n") | |
2356 | ;; (set! has-shown-backtrace-hint? #t)))) | |
2357 | ;; (display "No backtrace available.\n"))) | |
21ed9efe | 2358 | |
0f2d19dd | 2359 | (define (error-catching-repl r e p) |
5f89fb13 MV |
2360 | (error-catching-loop |
2361 | (lambda () | |
2362 | (call-with-values (lambda () (e (r))) | |
2363 | (lambda the-values (for-each p the-values)))))) | |
0f2d19dd JB |
2364 | |
2365 | (define (gc-run-time) | |
2366 | (cdr (assq 'gc-time-taken (gc-stats)))) | |
2367 | ||
3e3cec45 MD |
2368 | (define before-read-hook (make-hook)) |
2369 | (define after-read-hook (make-hook)) | |
870777d7 KN |
2370 | (define before-eval-hook (make-hook 1)) |
2371 | (define after-eval-hook (make-hook 1)) | |
2372 | (define before-print-hook (make-hook 1)) | |
2373 | (define after-print-hook (make-hook 1)) | |
1c6cd8e8 | 2374 | |
dc5c2038 MD |
2375 | ;;; The default repl-reader function. We may override this if we've |
2376 | ;;; the readline library. | |
2377 | (define repl-reader | |
2378 | (lambda (prompt) | |
2379 | (display prompt) | |
2380 | (force-output) | |
04efd24d | 2381 | (run-hook before-read-hook) |
dc5c2038 MD |
2382 | (read (current-input-port)))) |
2383 | ||
0f2d19dd | 2384 | (define (scm-style-repl) |
9d774814 | 2385 | |
0f2d19dd JB |
2386 | (letrec ( |
2387 | (start-gc-rt #f) | |
2388 | (start-rt #f) | |
0f2d19dd JB |
2389 | (repl-report-start-timing (lambda () |
2390 | (set! start-gc-rt (gc-run-time)) | |
2391 | (set! start-rt (get-internal-run-time)))) | |
2392 | (repl-report (lambda () | |
2393 | (display ";;; ") | |
2394 | (display (inexact->exact | |
2395 | (* 1000 (/ (- (get-internal-run-time) start-rt) | |
2396 | internal-time-units-per-second)))) | |
2397 | (display " msec (") | |
2398 | (display (inexact->exact | |
2399 | (* 1000 (/ (- (gc-run-time) start-gc-rt) | |
2400 | internal-time-units-per-second)))) | |
2401 | (display " msec in gc)\n"))) | |
480977d0 JB |
2402 | |
2403 | (consume-trailing-whitespace | |
2404 | (lambda () | |
2405 | (let ((ch (peek-char))) | |
2406 | (cond | |
2407 | ((eof-object? ch)) | |
2408 | ((or (char=? ch #\space) (char=? ch #\tab)) | |
2409 | (read-char) | |
2410 | (consume-trailing-whitespace)) | |
2411 | ((char=? ch #\newline) | |
2412 | (read-char)))))) | |
0f2d19dd | 2413 | (-read (lambda () |
dc5c2038 MD |
2414 | (let ((val |
2415 | (let ((prompt (cond ((string? scm-repl-prompt) | |
2416 | scm-repl-prompt) | |
2417 | ((thunk? scm-repl-prompt) | |
2418 | (scm-repl-prompt)) | |
2419 | (scm-repl-prompt "> ") | |
2420 | (else "")))) | |
2421 | (repl-reader prompt)))) | |
2422 | ||
480977d0 | 2423 | ;; As described in R4RS, the READ procedure updates the |
e13c54c4 | 2424 | ;; port to point to the first character past the end of |
480977d0 JB |
2425 | ;; the external representation of the object. This |
2426 | ;; means that it doesn't consume the newline typically | |
2427 | ;; found after an expression. This means that, when | |
2428 | ;; debugging Guile with GDB, GDB gets the newline, which | |
2429 | ;; it often interprets as a "continue" command, making | |
2430 | ;; breakpoints kind of useless. So, consume any | |
2431 | ;; trailing newline here, as well as any whitespace | |
2432 | ;; before it. | |
e13c54c4 JB |
2433 | ;; But not if EOF, for control-D. |
2434 | (if (not (eof-object? val)) | |
2435 | (consume-trailing-whitespace)) | |
04efd24d | 2436 | (run-hook after-read-hook) |
0f2d19dd JB |
2437 | (if (eof-object? val) |
2438 | (begin | |
7950df7c | 2439 | (repl-report-start-timing) |
0f2d19dd JB |
2440 | (if scm-repl-verbose |
2441 | (begin | |
2442 | (newline) | |
2443 | (display ";;; EOF -- quitting") | |
2444 | (newline))) | |
2445 | (quit 0))) | |
2446 | val))) | |
2447 | ||
2448 | (-eval (lambda (sourc) | |
2449 | (repl-report-start-timing) | |
870777d7 KN |
2450 | (run-hook before-eval-hook sourc) |
2451 | (let ((val (start-stack 'repl-stack | |
2452 | ;; If you change this procedure | |
2453 | ;; (primitive-eval), please also | |
2454 | ;; modify the repl-stack case in | |
2455 | ;; save-stack so that stack cutting | |
2456 | ;; continues to work. | |
2457 | (primitive-eval sourc)))) | |
2458 | (run-hook after-eval-hook sourc) | |
2459 | val))) | |
20edfbbd | 2460 | |
0f2d19dd | 2461 | |
44484f52 MD |
2462 | (-print (let ((maybe-print (lambda (result) |
2463 | (if (or scm-repl-print-unspecified | |
2464 | (not (unspecified? result))) | |
2465 | (begin | |
2466 | (write result) | |
2467 | (newline)))))) | |
2468 | (lambda (result) | |
2469 | (if (not scm-repl-silent) | |
2470 | (begin | |
870777d7 | 2471 | (run-hook before-print-hook result) |
3923fa6d | 2472 | (maybe-print result) |
870777d7 | 2473 | (run-hook after-print-hook result) |
44484f52 MD |
2474 | (if scm-repl-verbose |
2475 | (repl-report)) | |
2476 | (force-output)))))) | |
0f2d19dd | 2477 | |
8e44e7a0 | 2478 | (-quit (lambda (args) |
0f2d19dd JB |
2479 | (if scm-repl-verbose |
2480 | (begin | |
2481 | (display ";;; QUIT executed, repl exitting") | |
2482 | (newline) | |
2483 | (repl-report))) | |
8e44e7a0 | 2484 | args)) |
0f2d19dd JB |
2485 | |
2486 | (-abort (lambda () | |
2487 | (if scm-repl-verbose | |
2488 | (begin | |
2489 | (display ";;; ABORT executed.") | |
2490 | (newline) | |
2491 | (repl-report))) | |
2492 | (repl -read -eval -print)))) | |
2493 | ||
8e44e7a0 GH |
2494 | (let ((status (error-catching-repl -read |
2495 | -eval | |
2496 | -print))) | |
2497 | (-quit status)))) | |
20edfbbd | 2498 | |
0f2d19dd | 2499 | |
0f2d19dd | 2500 | \f |
44cf1f0f | 2501 | ;;; {IOTA functions: generating lists of numbers} |
0f2d19dd | 2502 | |
e69cd299 MD |
2503 | (define (iota n) |
2504 | (let loop ((count (1- n)) (result '())) | |
2505 | (if (< count 0) result | |
2506 | (loop (1- count) (cons count result))))) | |
0f2d19dd JB |
2507 | |
2508 | \f | |
2509 | ;;; {While} | |
2510 | ;;; | |
2511 | ;;; with `continue' and `break'. | |
2512 | ;;; | |
2513 | ||
2514 | (defmacro while (cond . body) | |
2515 | `(letrec ((continue (lambda () (or (not ,cond) (begin (begin ,@ body) (continue))))) | |
2516 | (break (lambda val (apply throw 'break val)))) | |
2517 | (catch 'break | |
2518 | (lambda () (continue)) | |
2519 | (lambda v (cadr v))))) | |
2520 | ||
7398c2c2 MD |
2521 | ;;; {collect} |
2522 | ;;; | |
2523 | ;;; Similar to `begin' but returns a list of the results of all constituent | |
2524 | ;;; forms instead of the result of the last form. | |
2525 | ;;; (The definition relies on the current left-to-right | |
2526 | ;;; order of evaluation of operands in applications.) | |
2527 | ||
2528 | (defmacro collect forms | |
2529 | (cons 'list forms)) | |
0f2d19dd | 2530 | |
8a6a8671 MV |
2531 | ;;; {with-fluids} |
2532 | ||
2533 | ;; with-fluids is a convenience wrapper for the builtin procedure | |
2534 | ;; `with-fluids*'. The syntax is just like `let': | |
2535 | ;; | |
2536 | ;; (with-fluids ((fluid val) | |
2537 | ;; ...) | |
2538 | ;; body) | |
2539 | ||
2540 | (defmacro with-fluids (bindings . body) | |
2541 | `(with-fluids* (list ,@(map car bindings)) (list ,@(map cadr bindings)) | |
2542 | (lambda () ,@body))) | |
2543 | ||
0f2d19dd JB |
2544 | \f |
2545 | ||
2546 | ;;; {Macros} | |
2547 | ;;; | |
2548 | ||
2549 | ;; actually....hobbit might be able to hack these with a little | |
2550 | ;; coaxing | |
2551 | ;; | |
2552 | ||
2553 | (defmacro define-macro (first . rest) | |
2554 | (let ((name (if (symbol? first) first (car first))) | |
2555 | (transformer | |
2556 | (if (symbol? first) | |
2557 | (car rest) | |
2558 | `(lambda ,(cdr first) ,@rest)))) | |
8add1522 KN |
2559 | `(eval-case |
2560 | ((load-toplevel) | |
2561 | (define ,name (defmacro:transformer ,transformer))) | |
2562 | (else | |
2563 | (error "define-macro can only be used at the top level"))))) | |
0f2d19dd JB |
2564 | |
2565 | ||
2566 | (defmacro define-syntax-macro (first . rest) | |
2567 | (let ((name (if (symbol? first) first (car first))) | |
2568 | (transformer | |
2569 | (if (symbol? first) | |
2570 | (car rest) | |
2571 | `(lambda ,(cdr first) ,@rest)))) | |
8add1522 KN |
2572 | `(eval-case |
2573 | ((load-toplevel) | |
2574 | (define ,name (defmacro:syntax-transformer ,transformer))) | |
2575 | (else | |
2576 | (error "define-syntax-macro can only be used at the top level"))))) | |
645e38d9 | 2577 | |
0f2d19dd JB |
2578 | \f |
2579 | ;;; {Module System Macros} | |
2580 | ;;; | |
2581 | ||
532cf805 MV |
2582 | ;; Return a list of expressions that evaluate to the appropriate |
2583 | ;; arguments for resolve-interface according to SPEC. | |
2584 | ||
2585 | (define (compile-interface-spec spec) | |
2586 | (define (make-keyarg sym key quote?) | |
2587 | (cond ((or (memq sym spec) | |
2588 | (memq key spec)) | |
2589 | => (lambda (rest) | |
2590 | (if quote? | |
2591 | (list key (list 'quote (cadr rest))) | |
2592 | (list key (cadr rest))))) | |
2593 | (else | |
2594 | '()))) | |
2595 | (define (map-apply func list) | |
2596 | (map (lambda (args) (apply func args)) list)) | |
bbf5a913 | 2597 | (define keys |
532cf805 MV |
2598 | ;; sym key quote? |
2599 | '((:select #:select #t) | |
c614a00b | 2600 | (:hide #:hide #t) |
f595ccfe | 2601 | (:prefix #:prefix #t) |
6672871b | 2602 | (:renamer #:renamer #f))) |
532cf805 MV |
2603 | (if (not (pair? (car spec))) |
2604 | `(',spec) | |
2605 | `(',(car spec) | |
2606 | ,@(apply append (map-apply make-keyarg keys))))) | |
2607 | ||
2608 | (define (keyword-like-symbol->keyword sym) | |
2609 | (symbol->keyword (string->symbol (substring (symbol->string sym) 1)))) | |
2610 | ||
2611 | (define (compile-define-module-args args) | |
2612 | ;; Just quote everything except #:use-module and #:use-syntax. We | |
2613 | ;; need to know about all arguments regardless since we want to turn | |
2614 | ;; symbols that look like keywords into real keywords, and the | |
2615 | ;; keyword args in a define-module form are not regular | |
2616 | ;; (i.e. no-backtrace doesn't take a value). | |
2617 | (let loop ((compiled-args `((quote ,(car args)))) | |
2618 | (args (cdr args))) | |
2619 | (cond ((null? args) | |
2620 | (reverse! compiled-args)) | |
2621 | ;; symbol in keyword position | |
2622 | ((symbol? (car args)) | |
2623 | (loop compiled-args | |
2624 | (cons (keyword-like-symbol->keyword (car args)) (cdr args)))) | |
2625 | ((memq (car args) '(#:no-backtrace #:pure)) | |
2626 | (loop (cons (car args) compiled-args) | |
2627 | (cdr args))) | |
2628 | ((null? (cdr args)) | |
2629 | (error "keyword without value:" (car args))) | |
2630 | ((memq (car args) '(#:use-module #:use-syntax)) | |
2631 | (loop (cons* `(list ,@(compile-interface-spec (cadr args))) | |
2632 | (car args) | |
2633 | compiled-args) | |
2634 | (cddr args))) | |
2635 | ((eq? (car args) #:autoload) | |
2636 | (loop (cons* `(quote ,(caddr args)) | |
2637 | `(quote ,(cadr args)) | |
2638 | (car args) | |
2639 | compiled-args) | |
2640 | (cdddr args))) | |
2641 | (else | |
2642 | (loop (cons* `(quote ,(cadr args)) | |
2643 | (car args) | |
2644 | compiled-args) | |
2645 | (cddr args)))))) | |
2646 | ||
0f2d19dd | 2647 | (defmacro define-module args |
7b748b16 | 2648 | `(eval-case |
645e38d9 | 2649 | ((load-toplevel) |
bbf5a913 | 2650 | (let ((m (process-define-module |
532cf805 | 2651 | (list ,@(compile-define-module-args args))))) |
25afac98 MV |
2652 | (set-current-module m) |
2653 | m)) | |
645e38d9 MV |
2654 | (else |
2655 | (error "define-module can only be used at the top level")))) | |
0f2d19dd | 2656 | |
532cf805 MV |
2657 | ;; The guts of the use-modules macro. Add the interfaces of the named |
2658 | ;; modules to the use-list of the current module, in order. | |
2659 | ||
482a28f9 MV |
2660 | ;; This function is called by "modules.c". If you change it, be sure |
2661 | ;; to change scm_c_use_module as well. | |
2662 | ||
532cf805 | 2663 | (define (process-use-modules module-interface-args) |
d57da08b MD |
2664 | (let ((interfaces (map (lambda (mif-args) |
2665 | (or (apply resolve-interface mif-args) | |
2666 | (error "no such module" mif-args))) | |
2667 | module-interface-args))) | |
2668 | (call-with-deferred-observers | |
2669 | (lambda () | |
2670 | (module-use-interfaces! (current-module) interfaces))))) | |
89da9036 | 2671 | |
33cf699f | 2672 | (defmacro use-modules modules |
7b748b16 | 2673 | `(eval-case |
645e38d9 | 2674 | ((load-toplevel) |
532cf805 MV |
2675 | (process-use-modules |
2676 | (list ,@(map (lambda (m) | |
2677 | `(list ,@(compile-interface-spec m))) | |
7b07e5ef MD |
2678 | modules))) |
2679 | *unspecified*) | |
645e38d9 MV |
2680 | (else |
2681 | (error "use-modules can only be used at the top level")))) | |
33cf699f | 2682 | |
cf266109 | 2683 | (defmacro use-syntax (spec) |
7b748b16 | 2684 | `(eval-case |
645e38d9 | 2685 | ((load-toplevel) |
7cbaee0c | 2686 | ,@(if (pair? spec) |
532cf805 MV |
2687 | `((process-use-modules (list |
2688 | (list ,@(compile-interface-spec spec)))) | |
7cbaee0c MD |
2689 | (set-module-transformer! (current-module) |
2690 | ,(car (last-pair spec)))) | |
cf743aea MD |
2691 | `((set-module-transformer! (current-module) ,spec))) |
2692 | *unspecified*) | |
645e38d9 | 2693 | (else |
4879243c | 2694 | (error "use-syntax can only be used at the top level")))) |
7a0ff2f8 | 2695 | |
9123414e DH |
2696 | ;; Dirk:FIXME:: This incorrect (according to R5RS) syntax needs to be changed |
2697 | ;; as soon as guile supports hygienic macros. | |
2698 | (define define-private define) | |
0f2d19dd JB |
2699 | |
2700 | (defmacro define-public args | |
2701 | (define (syntax) | |
2702 | (error "bad syntax" (list 'define-public args))) | |
2703 | (define (defined-name n) | |
2704 | (cond | |
3c5af9ef JB |
2705 | ((symbol? n) n) |
2706 | ((pair? n) (defined-name (car n))) | |
2707 | (else (syntax)))) | |
0f2d19dd | 2708 | (cond |
645e38d9 MV |
2709 | ((null? args) |
2710 | (syntax)) | |
2711 | (#t | |
2712 | (let ((name (defined-name (car args)))) | |
2713 | `(begin | |
a482f2cc MV |
2714 | (define-private ,@args) |
2715 | (eval-case ((load-toplevel) (export ,name)))))))) | |
0f2d19dd JB |
2716 | |
2717 | (defmacro defmacro-public args | |
2718 | (define (syntax) | |
2719 | (error "bad syntax" (list 'defmacro-public args))) | |
2720 | (define (defined-name n) | |
2721 | (cond | |
645e38d9 MV |
2722 | ((symbol? n) n) |
2723 | (else (syntax)))) | |
0f2d19dd | 2724 | (cond |
645e38d9 MV |
2725 | ((null? args) |
2726 | (syntax)) | |
2727 | (#t | |
2728 | (let ((name (defined-name (car args)))) | |
2729 | `(begin | |
d57da08b | 2730 | (eval-case ((load-toplevel) (export-syntax ,name))) |
645e38d9 | 2731 | (defmacro ,@args)))))) |
0f2d19dd | 2732 | |
89d06712 | 2733 | ;; Export a local variable |
482a28f9 MV |
2734 | |
2735 | ;; This function is called from "modules.c". If you change it, be | |
2736 | ;; sure to update "modules.c" as well. | |
2737 | ||
90847923 MD |
2738 | (define (module-export! m names) |
2739 | (let ((public-i (module-public-interface m))) | |
2740 | (for-each (lambda (name) | |
89d06712 MV |
2741 | (let ((var (module-ensure-local-variable! m name))) |
2742 | (module-add! public-i name var))) | |
2743 | names))) | |
2744 | ||
f595ccfe MD |
2745 | (define (module-replace! m names) |
2746 | (let ((public-i (module-public-interface m))) | |
2747 | (for-each (lambda (name) | |
2748 | (let ((var (module-ensure-local-variable! m name))) | |
2749 | (set-object-property! var 'replace #t) | |
2750 | (module-add! public-i name var))) | |
2751 | names))) | |
2752 | ||
89d06712 MV |
2753 | ;; Re-export a imported variable |
2754 | ;; | |
2755 | (define (module-re-export! m names) | |
2756 | (let ((public-i (module-public-interface m))) | |
2757 | (for-each (lambda (name) | |
2758 | (let ((var (module-variable m name))) | |
2759 | (cond ((not var) | |
2760 | (error "Undefined variable:" name)) | |
2761 | ((eq? var (module-local-variable m name)) | |
2762 | (error "re-exporting local variable:" name)) | |
2763 | (else | |
2764 | (module-add! public-i name var))))) | |
90847923 MD |
2765 | names))) |
2766 | ||
a0cc0a01 | 2767 | (defmacro export names |
7b748b16 | 2768 | `(eval-case |
645e38d9 | 2769 | ((load-toplevel) |
d57da08b MD |
2770 | (call-with-deferred-observers |
2771 | (lambda () | |
2772 | (module-export! (current-module) ',names)))) | |
645e38d9 MV |
2773 | (else |
2774 | (error "export can only be used at the top level")))) | |
a0cc0a01 | 2775 | |
89d06712 MV |
2776 | (defmacro re-export names |
2777 | `(eval-case | |
2778 | ((load-toplevel) | |
d57da08b MD |
2779 | (call-with-deferred-observers |
2780 | (lambda () | |
2781 | (module-re-export! (current-module) ',names)))) | |
89d06712 MV |
2782 | (else |
2783 | (error "re-export can only be used at the top level")))) | |
2784 | ||
ab382f52 | 2785 | (defmacro export-syntax names |
6aa9ea7c | 2786 | `(export ,@names)) |
a0cc0a01 | 2787 | |
f2cbc0e5 DH |
2788 | (defmacro re-export-syntax names |
2789 | `(re-export ,@names)) | |
a0cc0a01 | 2790 | |
0f2d19dd JB |
2791 | (define load load-module) |
2792 | ||
7f24bc58 | 2793 | \f |
f595ccfe MD |
2794 | ;;; {Parameters} |
2795 | ;;; | |
2796 | ||
2797 | (define make-mutable-parameter | |
2798 | (let ((make (lambda (fluid converter) | |
2799 | (lambda args | |
2800 | (if (null? args) | |
2801 | (fluid-ref fluid) | |
2802 | (fluid-set! fluid (converter (car args)))))))) | |
2803 | (lambda (init . converter) | |
2804 | (let ((fluid (make-fluid)) | |
2805 | (converter (if (null? converter) | |
2806 | identity | |
2807 | (car converter)))) | |
2808 | (fluid-set! fluid (converter init)) | |
2809 | (make fluid converter))))) | |
2810 | ||
2811 | \f | |
7b07e5ef MD |
2812 | ;;; {Handling of duplicate imported bindings} |
2813 | ;;; | |
2814 | ||
2815 | ;; Duplicate handlers take the following arguments: | |
2816 | ;; | |
2817 | ;; module importing module | |
2818 | ;; name conflicting name | |
2819 | ;; int1 old interface where name occurs | |
2820 | ;; val1 value of binding in old interface | |
2821 | ;; int2 new interface where name occurs | |
2822 | ;; val2 value of binding in new interface | |
2823 | ;; var previous resolution or #f | |
2824 | ;; val value of previous resolution | |
2825 | ;; | |
2826 | ;; A duplicate handler can take three alternative actions: | |
2827 | ;; | |
2828 | ;; 1. return #f => leave responsibility to next handler | |
2829 | ;; 2. exit with an error | |
2830 | ;; 3. return a variable resolving the conflict | |
2831 | ;; | |
2832 | ||
2833 | (define duplicate-handlers | |
2834 | (let ((m (make-module 7))) | |
f595ccfe MD |
2835 | |
2836 | (define (check module name int1 val1 int2 val2 var val) | |
2837 | (scm-error 'misc-error | |
2838 | #f | |
8dd18cea | 2839 | "~A: `~A' imported from both ~A and ~A" |
f595ccfe MD |
2840 | (list (module-name module) |
2841 | name | |
2842 | (module-name int1) | |
2843 | (module-name int2)) | |
2844 | #f)) | |
2845 | ||
2846 | (define (warn module name int1 val1 int2 val2 var val) | |
2847 | (format #t | |
0c160c73 | 2848 | "WARNING: ~A: `~A' imported from both ~A and ~A\n" |
f595ccfe MD |
2849 | (module-name module) |
2850 | name | |
2851 | (module-name int1) | |
2852 | (module-name int2)) | |
2853 | #f) | |
2854 | ||
2855 | (define (replace module name int1 val1 int2 val2 var val) | |
2856 | (let ((old (or (and var (object-property var 'replace) var) | |
2857 | (module-variable int1 name))) | |
2858 | (new (module-variable int2 name))) | |
2859 | (if (object-property old 'replace) | |
2860 | (and (or (eq? old new) | |
2861 | (not (object-property new 'replace))) | |
2862 | old) | |
2863 | (and (object-property new 'replace) | |
2864 | new)))) | |
2865 | ||
2866 | (define (warn-override-core module name int1 val1 int2 val2 var val) | |
2867 | (and (eq? int1 the-scm-module) | |
2868 | (begin | |
2869 | (format #t | |
8dd18cea | 2870 | "WARNING: ~A: imported module ~A overrides core binding `~A'\n" |
f595ccfe MD |
2871 | (module-name module) |
2872 | (module-name int2) | |
2873 | name) | |
2874 | (module-local-variable int2 name)))) | |
2875 | ||
2876 | (define (first module name int1 val1 int2 val2 var val) | |
2877 | (or var (module-local-variable int1 name))) | |
2878 | ||
2879 | (define (last module name int1 val1 int2 val2 var val) | |
2880 | (module-local-variable int2 name)) | |
2881 | ||
7b07e5ef MD |
2882 | (set-module-name! m 'duplicate-handlers) |
2883 | (set-module-kind! m 'interface) | |
f595ccfe MD |
2884 | (module-define! m 'check check) |
2885 | (module-define! m 'warn warn) | |
2886 | (module-define! m 'replace replace) | |
2887 | (module-define! m 'warn-override-core warn-override-core) | |
2888 | (module-define! m 'first first) | |
2889 | (module-define! m 'last last) | |
7b07e5ef MD |
2890 | m)) |
2891 | ||
f595ccfe | 2892 | (define (lookup-duplicates-handlers handler-names) |
109c2c9f MD |
2893 | (and handler-names |
2894 | (map (lambda (handler-name) | |
2895 | (or (module-symbol-local-binding | |
2896 | duplicate-handlers handler-name #f) | |
2897 | (error "invalid duplicate handler name:" | |
2898 | handler-name))) | |
2899 | (if (list? handler-names) | |
2900 | handler-names | |
2901 | (list handler-names))))) | |
f595ccfe | 2902 | |
70a459e3 MD |
2903 | (define default-duplicate-binding-procedures |
2904 | (make-mutable-parameter #f)) | |
2905 | ||
2906 | (define default-duplicate-binding-handler | |
6496a663 | 2907 | (make-mutable-parameter '(replace warn-override-core warn last) |
70a459e3 MD |
2908 | (lambda (handler-names) |
2909 | (default-duplicate-binding-procedures | |
2910 | (lookup-duplicates-handlers handler-names)) | |
2911 | handler-names))) | |
f595ccfe | 2912 | |
7b07e5ef MD |
2913 | (define (make-duplicates-interface) |
2914 | (let ((m (make-module))) | |
c614a00b | 2915 | (set-module-kind! m 'custom-interface) |
7b07e5ef MD |
2916 | (set-module-name! m 'duplicates) |
2917 | m)) | |
2918 | ||
7b07e5ef | 2919 | (define (process-duplicates module interface) |
8d8dac1f | 2920 | (let* ((duplicates-handlers (or (module-duplicates-handlers module) |
70a459e3 | 2921 | (default-duplicate-binding-procedures))) |
8d8dac1f | 2922 | (duplicates-interface (module-duplicates-interface module))) |
7b07e5ef MD |
2923 | (module-for-each |
2924 | (lambda (name var) | |
109c2c9f MD |
2925 | (cond ((module-import-interface module name) |
2926 | => | |
2927 | (lambda (prev-interface) | |
2928 | (let ((var1 (module-local-variable prev-interface name)) | |
2929 | (var2 (module-local-variable interface name))) | |
2930 | (if (not (eq? var1 var2)) | |
2931 | (begin | |
2932 | (if (not duplicates-interface) | |
2933 | (begin | |
2934 | (set! duplicates-interface | |
2935 | (make-duplicates-interface)) | |
8d8dac1f MD |
2936 | (set-module-duplicates-interface! |
2937 | module | |
2938 | duplicates-interface))) | |
109c2c9f MD |
2939 | (let* ((var (module-local-variable duplicates-interface |
2940 | name)) | |
2941 | (val (and var | |
2942 | (variable-bound? var) | |
2943 | (variable-ref var)))) | |
2944 | (let loop ((duplicates-handlers duplicates-handlers)) | |
2945 | (cond ((null? duplicates-handlers)) | |
2946 | (((car duplicates-handlers) | |
2947 | module | |
2948 | name | |
2949 | prev-interface | |
2950 | (and (variable-bound? var1) | |
2951 | (variable-ref var1)) | |
2952 | interface | |
2953 | (and (variable-bound? var2) | |
2954 | (variable-ref var2)) | |
2955 | var | |
2956 | val) | |
2957 | => | |
2958 | (lambda (var) | |
2959 | (module-add! duplicates-interface name var))) | |
2960 | (else | |
2961 | (loop (cdr duplicates-handlers))))))))))))) | |
7b07e5ef MD |
2962 | interface))) |
2963 | ||
2964 | \f | |
7f24bc58 MG |
2965 | |
2966 | ;;; {`cond-expand' for SRFI-0 support.} | |
2967 | ;;; | |
2968 | ;;; This syntactic form expands into different commands or | |
2969 | ;;; definitions, depending on the features provided by the Scheme | |
2970 | ;;; implementation. | |
2971 | ;;; | |
2972 | ;;; Syntax: | |
2973 | ;;; | |
2974 | ;;; <cond-expand> | |
2975 | ;;; --> (cond-expand <cond-expand-clause>+) | |
2976 | ;;; | (cond-expand <cond-expand-clause>* (else <command-or-definition>)) | |
2977 | ;;; <cond-expand-clause> | |
2978 | ;;; --> (<feature-requirement> <command-or-definition>*) | |
2979 | ;;; <feature-requirement> | |
2980 | ;;; --> <feature-identifier> | |
2981 | ;;; | (and <feature-requirement>*) | |
2982 | ;;; | (or <feature-requirement>*) | |
2983 | ;;; | (not <feature-requirement>) | |
2984 | ;;; <feature-identifier> | |
2985 | ;;; --> <a symbol which is the name or alias of a SRFI> | |
2986 | ;;; | |
2987 | ;;; Additionally, this implementation provides the | |
2988 | ;;; <feature-identifier>s `guile' and `r5rs', so that programs can | |
2989 | ;;; determine the implementation type and the supported standard. | |
2990 | ;;; | |
2991 | ;;; Currently, the following feature identifiers are supported: | |
2992 | ;;; | |
f41be016 | 2993 | ;;; guile r5rs srfi-0 |
7f24bc58 MG |
2994 | ;;; |
2995 | ;;; Remember to update the features list when adding more SRFIs. | |
2996 | ||
b9b8f9da | 2997 | (define %cond-expand-features |
f41be016 MG |
2998 | ;; Adjust the above comment when changing this. |
2999 | '(guile r5rs srfi-0)) | |
1d00af09 | 3000 | |
b9b8f9da MG |
3001 | ;; This table maps module public interfaces to the list of features. |
3002 | ;; | |
3003 | (define %cond-expand-table (make-hash-table 31)) | |
3004 | ||
3005 | ;; Add one or more features to the `cond-expand' feature list of the | |
3006 | ;; module `module'. | |
3007 | ;; | |
3008 | (define (cond-expand-provide module features) | |
3009 | (let ((mod (module-public-interface module))) | |
3010 | (and mod | |
3011 | (hashq-set! %cond-expand-table mod | |
3012 | (append (hashq-ref %cond-expand-table mod '()) | |
3013 | features))))) | |
3014 | ||
9f79272a MV |
3015 | (define cond-expand |
3016 | (procedure->memoizing-macro | |
3017 | (lambda (exp env) | |
3018 | (let ((clauses (cdr exp)) | |
3019 | (syntax-error (lambda (cl) | |
3020 | (error "invalid clause in `cond-expand'" cl)))) | |
3021 | (letrec | |
3022 | ((test-clause | |
3023 | (lambda (clause) | |
7f24bc58 | 3024 | (cond |
9f79272a MV |
3025 | ((symbol? clause) |
3026 | (or (memq clause %cond-expand-features) | |
3027 | (let lp ((uses (module-uses (env-module env)))) | |
3028 | (if (pair? uses) | |
3029 | (or (memq clause | |
3030 | (hashq-ref %cond-expand-table | |
3031 | (car uses) '())) | |
3032 | (lp (cdr uses))) | |
3033 | #f)))) | |
3034 | ((pair? clause) | |
3035 | (cond | |
3036 | ((eq? 'and (car clause)) | |
3037 | (let lp ((l (cdr clause))) | |
3038 | (cond ((null? l) | |
3039 | #t) | |
3040 | ((pair? l) | |
3041 | (and (test-clause (car l)) (lp (cdr l)))) | |
3042 | (else | |
3043 | (syntax-error clause))))) | |
3044 | ((eq? 'or (car clause)) | |
3045 | (let lp ((l (cdr clause))) | |
3046 | (cond ((null? l) | |
3047 | #f) | |
3048 | ((pair? l) | |
3049 | (or (test-clause (car l)) (lp (cdr l)))) | |
3050 | (else | |
3051 | (syntax-error clause))))) | |
3052 | ((eq? 'not (car clause)) | |
3053 | (cond ((not (pair? (cdr clause))) | |
3054 | (syntax-error clause)) | |
3055 | ((pair? (cddr clause)) | |
3056 | ((syntax-error clause)))) | |
3057 | (not (test-clause (cadr clause)))) | |
3058 | (else | |
3059 | (syntax-error clause)))) | |
3060 | (else | |
3061 | (syntax-error clause)))))) | |
3062 | (let lp ((c clauses)) | |
3063 | (cond | |
3064 | ((null? c) | |
3065 | (error "Unfulfilled `cond-expand'")) | |
3066 | ((not (pair? c)) | |
7f24bc58 | 3067 | (syntax-error c)) |
9f79272a MV |
3068 | ((not (pair? (car c))) |
3069 | (syntax-error (car c))) | |
3070 | ((test-clause (caar c)) | |
3071 | `(begin ,@(cdar c))) | |
3072 | ((eq? (caar c) 'else) | |
3073 | (if (pair? (cdr c)) | |
3074 | (syntax-error c)) | |
3075 | `(begin ,@(cdar c))) | |
3076 | (else | |
3077 | (lp (cdr c)))))))))) | |
0f2d19dd | 3078 | |
f41be016 MG |
3079 | ;; This procedure gets called from the startup code with a list of |
3080 | ;; numbers, which are the numbers of the SRFIs to be loaded on startup. | |
3081 | ;; | |
3082 | (define (use-srfis srfis) | |
3083 | (let lp ((s srfis)) | |
3084 | (if (pair? s) | |
f8a502cb TTN |
3085 | (let* ((srfi (string->symbol |
3086 | (string-append "srfi-" (number->string (car s))))) | |
3087 | (mod-i (resolve-interface (list 'srfi srfi)))) | |
3088 | (module-use! (current-module) mod-i) | |
f8a502cb TTN |
3089 | (lp (cdr s)))))) |
3090 | ||
0f2d19dd | 3091 | \f |
9d774814 | 3092 | |
9aca88c3 JB |
3093 | ;;; {Load emacs interface support if emacs option is given.} |
3094 | ||
645e38d9 | 3095 | (define (named-module-use! user usee) |
89d06712 | 3096 | (module-use! (resolve-module user) (resolve-interface usee))) |
645e38d9 | 3097 | |
9aca88c3 | 3098 | (define (load-emacs-interface) |
fb1b76f4 TTN |
3099 | (and (provided? 'debug-extensions) |
3100 | (debug-enable 'backtrace)) | |
645e38d9 | 3101 | (named-module-use! '(guile-user) '(ice-9 emacs))) |
9aca88c3 JB |
3102 | |
3103 | \f | |
0f2d19dd | 3104 | |
755457ec MD |
3105 | (define using-readline? |
3106 | (let ((using-readline? (make-fluid))) | |
3107 | (make-procedure-with-setter | |
3108 | (lambda () (fluid-ref using-readline?)) | |
3109 | (lambda (v) (fluid-set! using-readline? v))))) | |
3110 | ||
20edfbbd | 3111 | (define (top-repl) |
615bfe72 MV |
3112 | (let ((guile-user-module (resolve-module '(guile-user)))) |
3113 | ||
3114 | ;; Load emacs interface support if emacs option is given. | |
454b82f4 MD |
3115 | (if (and (module-defined? guile-user-module 'use-emacs-interface) |
3116 | (module-ref guile-user-module 'use-emacs-interface)) | |
615bfe72 MV |
3117 | (load-emacs-interface)) |
3118 | ||
3119 | ;; Use some convenient modules (in reverse order) | |
bbf5a913 | 3120 | |
615bfe72 | 3121 | (if (provided? 'regex) |
89d06712 | 3122 | (module-use! guile-user-module (resolve-interface '(ice-9 regex)))) |
615bfe72 | 3123 | (if (provided? 'threads) |
89d06712 | 3124 | (module-use! guile-user-module (resolve-interface '(ice-9 threads)))) |
615bfe72 | 3125 | ;; load debugger on demand |
bbf5a913 | 3126 | (module-use! guile-user-module |
615bfe72 MV |
3127 | (make-autoload-interface guile-user-module |
3128 | '(ice-9 debugger) '(debug))) | |
89d06712 MV |
3129 | (module-use! guile-user-module (resolve-interface '(ice-9 session))) |
3130 | (module-use! guile-user-module (resolve-interface '(ice-9 debug))) | |
615bfe72 | 3131 | ;; so that builtin bindings will be checked first |
89d06712 | 3132 | (module-use! guile-user-module (resolve-interface '(guile))) |
615bfe72 MV |
3133 | |
3134 | (set-current-module guile-user-module) | |
3135 | ||
3136 | (let ((old-handlers #f) | |
3137 | (signals (if (provided? 'posix) | |
3138 | `((,SIGINT . "User interrupt") | |
3139 | (,SIGFPE . "Arithmetic error") | |
3140 | (,SIGBUS . "Bad memory access (bus error)") | |
3141 | (,SIGSEGV | |
3142 | . "Bad memory access (Segmentation violation)")) | |
3143 | '()))) | |
3144 | ||
3145 | (dynamic-wind | |
3146 | ||
3147 | ;; call at entry | |
3148 | (lambda () | |
3149 | (let ((make-handler (lambda (msg) | |
3150 | (lambda (sig) | |
3151 | ;; Make a backup copy of the stack | |
3152 | (fluid-set! before-signal-stack | |
3153 | (fluid-ref the-last-stack)) | |
bb00edfa | 3154 | (save-stack 2) |
615bfe72 MV |
3155 | (scm-error 'signal |
3156 | #f | |
3157 | msg | |
3158 | #f | |
3159 | (list sig)))))) | |
3160 | (set! old-handlers | |
3161 | (map (lambda (sig-msg) | |
3162 | (sigaction (car sig-msg) | |
3163 | (make-handler (cdr sig-msg)))) | |
3164 | signals)))) | |
bbf5a913 | 3165 | |
615bfe72 MV |
3166 | ;; the protected thunk. |
3167 | (lambda () | |
3168 | (let ((status (scm-style-repl))) | |
3169 | (run-hook exit-hook) | |
3170 | status)) | |
bbf5a913 | 3171 | |
615bfe72 MV |
3172 | ;; call at exit. |
3173 | (lambda () | |
3174 | (map (lambda (sig-msg old-handler) | |
3175 | (if (not (car old-handler)) | |
3176 | ;; restore original C handler. | |
3177 | (sigaction (car sig-msg) #f) | |
3178 | ;; restore Scheme handler, SIG_IGN or SIG_DFL. | |
3179 | (sigaction (car sig-msg) | |
3180 | (car old-handler) | |
3181 | (cdr old-handler)))) | |
3182 | signals old-handlers)))))) | |
0f2d19dd | 3183 | |
02b754d3 GH |
3184 | (defmacro false-if-exception (expr) |
3185 | `(catch #t (lambda () ,expr) | |
3186 | (lambda args #f))) | |
3187 | ||
2055a1bc MD |
3188 | ;;; This hook is run at the very end of an interactive session. |
3189 | ;;; | |
3e3cec45 | 3190 | (define exit-hook (make-hook)) |
2055a1bc | 3191 | |
4d31f0da | 3192 | \f |
d866f445 MV |
3193 | (append! %load-path (list ".")) |
3194 | ||
3195 | ;; Place the user in the guile-user module. | |
3196 | ;; | |
6eb396fe | 3197 | |
615bfe72 | 3198 | (define-module (guile-user)) |
6d36532c | 3199 | |
20edfbbd | 3200 | ;;; boot-9.scm ends here |