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0f2d19dd JB |
1 | ;;; installed-scm-file |
2 | ||
9a18d8d4 | 3 | ;;;; Copyright (C) 1995,1996,1997,1998,1999,2000,2001,2002,2003,2004,2005,2006,2007 |
3d2ada2f | 4 | ;;;; Free Software Foundation, Inc. |
20edfbbd | 5 | ;;;; |
73be1d9e MV |
6 | ;;;; This library is free software; you can redistribute it and/or |
7 | ;;;; modify it under the terms of the GNU Lesser General Public | |
8 | ;;;; License as published by the Free Software Foundation; either | |
9 | ;;;; version 2.1 of the License, or (at your option) any later version. | |
10 | ;;;; | |
11 | ;;;; This library is distributed in the hope that it will be useful, | |
0f2d19dd | 12 | ;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of |
73be1d9e MV |
13 | ;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
14 | ;;;; Lesser General Public License for more details. | |
15 | ;;;; | |
16 | ;;;; You should have received a copy of the GNU Lesser General Public | |
17 | ;;;; License along with this library; if not, write to the Free Software | |
92205699 | 18 | ;;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
a482f2cc | 19 | ;;;; |
3d2ada2f | 20 | |
0f2d19dd JB |
21 | \f |
22 | ||
20edfbbd TTN |
23 | ;;; Commentary: |
24 | ||
0f2d19dd JB |
25 | ;;; This file is the first thing loaded into Guile. It adds many mundane |
26 | ;;; definitions and a few that are interesting. | |
27 | ;;; | |
20edfbbd | 28 | ;;; The module system (hence the hierarchical namespace) are defined in this |
0f2d19dd JB |
29 | ;;; file. |
30 | ;;; | |
31 | ||
20edfbbd TTN |
32 | ;;; Code: |
33 | ||
0f2d19dd | 34 | \f |
9fb41cea | 35 | |
21ed9efe | 36 | ;;; {Features} |
3d2ada2f | 37 | ;;; |
21ed9efe MD |
38 | |
39 | (define (provide sym) | |
40 | (if (not (memq sym *features*)) | |
41 | (set! *features* (cons sym *features*)))) | |
42 | ||
3d2ada2f DH |
43 | ;; Return #t iff FEATURE is available to this Guile interpreter. In SLIB, |
44 | ;; provided? also checks to see if the module is available. We should do that | |
45 | ;; too, but don't. | |
46 | ||
50706e94 JB |
47 | (define (provided? feature) |
48 | (and (memq feature *features*) #t)) | |
49 | ||
3d2ada2f | 50 | ;; let format alias simple-format until the more complete version is loaded |
52cfc69b | 51 | |
8641dd9e GB |
52 | (define format simple-format) |
53 | ||
fdc6aebf KR |
54 | ;; this is scheme wrapping the C code so the final pred call is a tail call, |
55 | ;; per SRFI-13 spec | |
56 | (define (string-any char_pred s . rest) | |
57 | (let ((start (if (null? rest) | |
58 | 0 (car rest))) | |
59 | (end (if (or (null? rest) (null? (cdr rest))) | |
60 | (string-length s) (cadr rest)))) | |
61 | (if (and (procedure? char_pred) | |
62 | (> end start) | |
63 | (<= end (string-length s))) ;; let c-code handle range error | |
64 | (or (string-any-c-code char_pred s start (1- end)) | |
65 | (char_pred (string-ref s (1- end)))) | |
66 | (string-any-c-code char_pred s start end)))) | |
67 | ||
68 | ;; this is scheme wrapping the C code so the final pred call is a tail call, | |
69 | ;; per SRFI-13 spec | |
70 | (define (string-every char_pred s . rest) | |
71 | (let ((start (if (null? rest) | |
72 | 0 (car rest))) | |
73 | (end (if (or (null? rest) (null? (cdr rest))) | |
74 | (string-length s) (cadr rest)))) | |
75 | (if (and (procedure? char_pred) | |
76 | (> end start) | |
77 | (<= end (string-length s))) ;; let c-code handle range error | |
78 | (and (string-every-c-code char_pred s start (1- end)) | |
79 | (char_pred (string-ref s (1- end)))) | |
80 | (string-every-c-code char_pred s start end)))) | |
81 | ||
1b05b324 MV |
82 | ;; A variant of string-fill! that we keep for compatability |
83 | ;; | |
84 | (define (substring-fill! str start end fill) | |
85 | (string-fill! str fill start end)) | |
86 | ||
21ed9efe | 87 | \f |
79451588 | 88 | |
3d2ada2f DH |
89 | ;;; {EVAL-CASE} |
90 | ;;; | |
91 | ||
92 | ;; (eval-case ((situation*) forms)* (else forms)?) | |
93 | ;; | |
94 | ;; Evaluate certain code based on the situation that eval-case is used | |
95 | ;; in. The only defined situation right now is `load-toplevel' which | |
96 | ;; triggers for code evaluated at the top-level, for example from the | |
97 | ;; REPL or when loading a file. | |
98 | ||
99 | (define eval-case | |
100 | (procedure->memoizing-macro | |
101 | (lambda (exp env) | |
102 | (define (toplevel-env? env) | |
103 | (or (not (pair? env)) (not (pair? (car env))))) | |
104 | (define (syntax) | |
105 | (error "syntax error in eval-case")) | |
106 | (let loop ((clauses (cdr exp))) | |
107 | (cond | |
108 | ((null? clauses) | |
109 | #f) | |
110 | ((not (list? (car clauses))) | |
111 | (syntax)) | |
112 | ((eq? 'else (caar clauses)) | |
113 | (or (null? (cdr clauses)) | |
114 | (syntax)) | |
115 | (cons 'begin (cdar clauses))) | |
116 | ((not (list? (caar clauses))) | |
117 | (syntax)) | |
118 | ((and (toplevel-env? env) | |
119 | (memq 'load-toplevel (caar clauses))) | |
120 | (cons 'begin (cdar clauses))) | |
121 | (else | |
122 | (loop (cdr clauses)))))))) | |
79451588 JB |
123 | |
124 | \f | |
48fdec21 | 125 | |
3d2ada2f DH |
126 | ;;; {Defmacros} |
127 | ;;; | |
128 | ;;; Depends on: features, eval-case | |
129 | ;;; | |
130 | ||
131 | (define macro-table (make-weak-key-hash-table 61)) | |
132 | (define xformer-table (make-weak-key-hash-table 61)) | |
133 | ||
134 | (define (defmacro? m) (hashq-ref macro-table m)) | |
135 | (define (assert-defmacro?! m) (hashq-set! macro-table m #t)) | |
136 | (define (defmacro-transformer m) (hashq-ref xformer-table m)) | |
137 | (define (set-defmacro-transformer! m t) (hashq-set! xformer-table m t)) | |
138 | ||
139 | (define defmacro:transformer | |
140 | (lambda (f) | |
141 | (let* ((xform (lambda (exp env) | |
142 | (copy-tree (apply f (cdr exp))))) | |
143 | (a (procedure->memoizing-macro xform))) | |
144 | (assert-defmacro?! a) | |
145 | (set-defmacro-transformer! a f) | |
146 | a))) | |
147 | ||
148 | ||
149 | (define defmacro | |
150 | (let ((defmacro-transformer | |
151 | (lambda (name parms . body) | |
152 | (let ((transformer `(lambda ,parms ,@body))) | |
153 | `(eval-case | |
154 | ((load-toplevel) | |
155 | (define ,name (defmacro:transformer ,transformer))) | |
156 | (else | |
157 | (error "defmacro can only be used at the top level"))))))) | |
158 | (defmacro:transformer defmacro-transformer))) | |
159 | ||
160 | (define defmacro:syntax-transformer | |
161 | (lambda (f) | |
162 | (procedure->syntax | |
163 | (lambda (exp env) | |
164 | (copy-tree (apply f (cdr exp))))))) | |
165 | ||
166 | ||
167 | ;; XXX - should the definition of the car really be looked up in the | |
168 | ;; current module? | |
169 | ||
170 | (define (macroexpand-1 e) | |
171 | (cond | |
172 | ((pair? e) (let* ((a (car e)) | |
173 | (val (and (symbol? a) (local-ref (list a))))) | |
174 | (if (defmacro? val) | |
175 | (apply (defmacro-transformer val) (cdr e)) | |
176 | e))) | |
177 | (#t e))) | |
178 | ||
179 | (define (macroexpand e) | |
180 | (cond | |
181 | ((pair? e) (let* ((a (car e)) | |
182 | (val (and (symbol? a) (local-ref (list a))))) | |
183 | (if (defmacro? val) | |
184 | (macroexpand (apply (defmacro-transformer val) (cdr e))) | |
185 | e))) | |
186 | (#t e))) | |
187 | ||
188 | (provide 'defmacro) | |
48fdec21 MV |
189 | |
190 | \f | |
191 | ||
3d2ada2f DH |
192 | ;;; {Deprecation} |
193 | ;;; | |
194 | ;;; Depends on: defmacro | |
195 | ;;; | |
196 | ||
197 | (defmacro begin-deprecated forms | |
198 | (if (include-deprecated-features) | |
199 | (cons begin forms) | |
200 | #f)) | |
201 | ||
202 | \f | |
203 | ||
204 | ;;; {R4RS compliance} | |
205 | ;;; | |
206 | ||
207 | (primitive-load-path "ice-9/r4rs.scm") | |
208 | ||
209 | \f | |
0f2d19dd | 210 | |
3d2ada2f DH |
211 | ;;; {Simple Debugging Tools} |
212 | ;;; | |
0f2d19dd JB |
213 | |
214 | ;; peek takes any number of arguments, writes them to the | |
215 | ;; current ouput port, and returns the last argument. | |
216 | ;; It is handy to wrap around an expression to look at | |
217 | ;; a value each time is evaluated, e.g.: | |
218 | ;; | |
219 | ;; (+ 10 (troublesome-fn)) | |
220 | ;; => (+ 10 (pk 'troublesome-fn-returned (troublesome-fn))) | |
221 | ;; | |
222 | ||
223 | (define (peek . stuff) | |
224 | (newline) | |
225 | (display ";;; ") | |
226 | (write stuff) | |
227 | (newline) | |
228 | (car (last-pair stuff))) | |
229 | ||
230 | (define pk peek) | |
231 | ||
232 | (define (warn . stuff) | |
233 | (with-output-to-port (current-error-port) | |
234 | (lambda () | |
235 | (newline) | |
236 | (display ";;; WARNING ") | |
6355358a | 237 | (display stuff) |
0f2d19dd JB |
238 | (newline) |
239 | (car (last-pair stuff))))) | |
240 | ||
241 | \f | |
3d2ada2f | 242 | |
79451588 | 243 | ;;; {Trivial Functions} |
0f2d19dd | 244 | ;;; |
79451588 | 245 | |
6b08d75b | 246 | (define (identity x) x) |
132e5fac | 247 | (define (and=> value procedure) (and value (procedure value))) |
e8ed460e | 248 | (define call/cc call-with-current-continuation) |
79451588 | 249 | |
5cd06d5e | 250 | ;;; apply-to-args is functionally redundant with apply and, worse, |
0f2d19dd JB |
251 | ;;; is less general than apply since it only takes two arguments. |
252 | ;;; | |
20edfbbd | 253 | ;;; On the other hand, apply-to-args is a syntacticly convenient way to |
0f2d19dd JB |
254 | ;;; perform binding in many circumstances when the "let" family of |
255 | ;;; of forms don't cut it. E.g.: | |
256 | ;;; | |
257 | ;;; (apply-to-args (return-3d-mouse-coords) | |
20edfbbd | 258 | ;;; (lambda (x y z) |
0f2d19dd JB |
259 | ;;; ...)) |
260 | ;;; | |
261 | ||
262 | (define (apply-to-args args fn) (apply fn args)) | |
263 | ||
3d2ada2f DH |
264 | (defmacro false-if-exception (expr) |
265 | `(catch #t (lambda () ,expr) | |
266 | (lambda args #f))) | |
267 | ||
268 | \f | |
269 | ||
270 | ;;; {General Properties} | |
271 | ;;; | |
272 | ||
273 | ;; This is a more modern interface to properties. It will replace all | |
274 | ;; other property-like things eventually. | |
275 | ||
276 | (define (make-object-property) | |
277 | (let ((prop (primitive-make-property #f))) | |
278 | (make-procedure-with-setter | |
279 | (lambda (obj) (primitive-property-ref prop obj)) | |
280 | (lambda (obj val) (primitive-property-set! prop obj val))))) | |
281 | ||
0f2d19dd | 282 | \f |
6b08d75b | 283 | |
0f2d19dd JB |
284 | ;;; {Symbol Properties} |
285 | ;;; | |
286 | ||
287 | (define (symbol-property sym prop) | |
288 | (let ((pair (assoc prop (symbol-pref sym)))) | |
289 | (and pair (cdr pair)))) | |
290 | ||
291 | (define (set-symbol-property! sym prop val) | |
292 | (let ((pair (assoc prop (symbol-pref sym)))) | |
293 | (if pair | |
294 | (set-cdr! pair val) | |
295 | (symbol-pset! sym (acons prop val (symbol-pref sym)))))) | |
296 | ||
297 | (define (symbol-property-remove! sym prop) | |
298 | (let ((pair (assoc prop (symbol-pref sym)))) | |
299 | (if pair | |
300 | (symbol-pset! sym (delq! pair (symbol-pref sym)))))) | |
301 | ||
302 | \f | |
1e531c3a | 303 | |
0f2d19dd JB |
304 | ;;; {Arrays} |
305 | ;;; | |
306 | ||
2042e178 MV |
307 | (define (array-shape a) |
308 | (map (lambda (ind) (if (number? ind) (list 0 (+ -1 ind)) ind)) | |
309 | (array-dimensions a))) | |
0f2d19dd JB |
310 | |
311 | \f | |
3d2ada2f | 312 | |
0f2d19dd JB |
313 | ;;; {Keywords} |
314 | ;;; | |
315 | ||
0f2d19dd JB |
316 | (define (kw-arg-ref args kw) |
317 | (let ((rem (member kw args))) | |
318 | (and rem (pair? (cdr rem)) (cadr rem)))) | |
319 | ||
320 | \f | |
fa7e9274 | 321 | |
9f9aa47b | 322 | ;;; {Structs} |
3d2ada2f | 323 | ;;; |
fa7e9274 MV |
324 | |
325 | (define (struct-layout s) | |
9f9aa47b | 326 | (struct-ref (struct-vtable s) vtable-index-layout)) |
fa7e9274 MV |
327 | |
328 | \f | |
d7faeb2e | 329 | |
3d2ada2f DH |
330 | ;;; {Environments} |
331 | ;;; | |
d7faeb2e MD |
332 | |
333 | (define the-environment | |
334 | (procedure->syntax | |
335 | (lambda (x e) | |
336 | e))) | |
337 | ||
338 | (define the-root-environment (the-environment)) | |
339 | ||
340 | (define (environment-module env) | |
341 | (let ((closure (and (pair? env) (car (last-pair env))))) | |
31b6212e | 342 | (and closure (procedure-property closure 'module)))) |
d7faeb2e MD |
343 | |
344 | \f | |
3d2ada2f | 345 | |
0f2d19dd JB |
346 | ;;; {Records} |
347 | ;;; | |
348 | ||
fa7e9274 MV |
349 | ;; Printing records: by default, records are printed as |
350 | ;; | |
351 | ;; #<type-name field1: val1 field2: val2 ...> | |
352 | ;; | |
353 | ;; You can change that by giving a custom printing function to | |
354 | ;; MAKE-RECORD-TYPE (after the list of field symbols). This function | |
355 | ;; will be called like | |
356 | ;; | |
357 | ;; (<printer> object port) | |
358 | ;; | |
359 | ;; It should print OBJECT to PORT. | |
360 | ||
cf8f1a90 | 361 | (define (inherit-print-state old-port new-port) |
8a30733e MD |
362 | (if (get-print-state old-port) |
363 | (port-with-print-state new-port (get-print-state old-port)) | |
cf8f1a90 MV |
364 | new-port)) |
365 | ||
9f9aa47b | 366 | ;; 0: type-name, 1: fields |
20edfbbd | 367 | (define record-type-vtable |
9f9aa47b MD |
368 | (make-vtable-vtable "prpr" 0 |
369 | (lambda (s p) | |
370 | (cond ((eq? s record-type-vtable) | |
371 | (display "#<record-type-vtable>" p)) | |
372 | (else | |
373 | (display "#<record-type " p) | |
374 | (display (record-type-name s) p) | |
375 | (display ">" p)))))) | |
0f2d19dd JB |
376 | |
377 | (define (record-type? obj) | |
378 | (and (struct? obj) (eq? record-type-vtable (struct-vtable obj)))) | |
379 | ||
380 | (define (make-record-type type-name fields . opt) | |
8e693424 | 381 | (let ((printer-fn (and (pair? opt) (car opt)))) |
0f2d19dd | 382 | (let ((struct (make-struct record-type-vtable 0 |
c7c03b9f | 383 | (make-struct-layout |
06f0414c | 384 | (apply string-append |
c7c03b9f | 385 | (map (lambda (f) "pw") fields))) |
9f9aa47b MD |
386 | (or printer-fn |
387 | (lambda (s p) | |
388 | (display "#<" p) | |
389 | (display type-name p) | |
390 | (let loop ((fields fields) | |
391 | (off 0)) | |
392 | (cond | |
393 | ((not (null? fields)) | |
394 | (display " " p) | |
395 | (display (car fields) p) | |
396 | (display ": " p) | |
397 | (display (struct-ref s off) p) | |
398 | (loop (cdr fields) (+ 1 off))))) | |
399 | (display ">" p))) | |
0f2d19dd JB |
400 | type-name |
401 | (copy-tree fields)))) | |
c8eed875 MD |
402 | ;; Temporary solution: Associate a name to the record type descriptor |
403 | ;; so that the object system can create a wrapper class for it. | |
404 | (set-struct-vtable-name! struct (if (symbol? type-name) | |
405 | type-name | |
406 | (string->symbol type-name))) | |
0f2d19dd JB |
407 | struct))) |
408 | ||
409 | (define (record-type-name obj) | |
410 | (if (record-type? obj) | |
9f9aa47b | 411 | (struct-ref obj vtable-offset-user) |
0f2d19dd JB |
412 | (error 'not-a-record-type obj))) |
413 | ||
414 | (define (record-type-fields obj) | |
415 | (if (record-type? obj) | |
9f9aa47b | 416 | (struct-ref obj (+ 1 vtable-offset-user)) |
0f2d19dd JB |
417 | (error 'not-a-record-type obj))) |
418 | ||
419 | (define (record-constructor rtd . opt) | |
8e693424 | 420 | (let ((field-names (if (pair? opt) (car opt) (record-type-fields rtd)))) |
d7faeb2e MD |
421 | (local-eval `(lambda ,field-names |
422 | (make-struct ',rtd 0 ,@(map (lambda (f) | |
423 | (if (memq f field-names) | |
424 | f | |
425 | #f)) | |
426 | (record-type-fields rtd)))) | |
427 | the-root-environment))) | |
0f2d19dd JB |
428 | |
429 | (define (record-predicate rtd) | |
430 | (lambda (obj) (and (struct? obj) (eq? rtd (struct-vtable obj))))) | |
431 | ||
afc4ccd4 KR |
432 | (define (%record-type-check rtd obj) ;; private helper |
433 | (or (eq? rtd (record-type-descriptor obj)) | |
434 | (scm-error 'wrong-type-arg "%record-type-check" | |
435 | "Wrong type record (want `~S'): ~S" | |
436 | (list (record-type-name rtd) obj) | |
437 | #f))) | |
438 | ||
0f2d19dd JB |
439 | (define (record-accessor rtd field-name) |
440 | (let* ((pos (list-index (record-type-fields rtd) field-name))) | |
441 | (if (not pos) | |
442 | (error 'no-such-field field-name)) | |
d7faeb2e | 443 | (local-eval `(lambda (obj) |
afc4ccd4 KR |
444 | (%record-type-check ',rtd obj) |
445 | (struct-ref obj ,pos)) | |
d7faeb2e | 446 | the-root-environment))) |
0f2d19dd JB |
447 | |
448 | (define (record-modifier rtd field-name) | |
449 | (let* ((pos (list-index (record-type-fields rtd) field-name))) | |
450 | (if (not pos) | |
451 | (error 'no-such-field field-name)) | |
d7faeb2e | 452 | (local-eval `(lambda (obj val) |
afc4ccd4 KR |
453 | (%record-type-check ',rtd obj) |
454 | (struct-set! obj ,pos val)) | |
d7faeb2e | 455 | the-root-environment))) |
0f2d19dd JB |
456 | |
457 | ||
458 | (define (record? obj) | |
459 | (and (struct? obj) (record-type? (struct-vtable obj)))) | |
460 | ||
461 | (define (record-type-descriptor obj) | |
462 | (if (struct? obj) | |
463 | (struct-vtable obj) | |
464 | (error 'not-a-record obj))) | |
465 | ||
21ed9efe MD |
466 | (provide 'record) |
467 | ||
0f2d19dd | 468 | \f |
3d2ada2f | 469 | |
0f2d19dd JB |
470 | ;;; {Booleans} |
471 | ;;; | |
472 | ||
473 | (define (->bool x) (not (not x))) | |
474 | ||
475 | \f | |
3d2ada2f | 476 | |
0f2d19dd JB |
477 | ;;; {Symbols} |
478 | ;;; | |
479 | ||
480 | (define (symbol-append . args) | |
06f0414c | 481 | (string->symbol (apply string-append (map symbol->string args)))) |
0f2d19dd JB |
482 | |
483 | (define (list->symbol . args) | |
484 | (string->symbol (apply list->string args))) | |
485 | ||
486 | (define (symbol . args) | |
487 | (string->symbol (apply string args))) | |
488 | ||
0f2d19dd | 489 | \f |
3d2ada2f | 490 | |
0f2d19dd JB |
491 | ;;; {Lists} |
492 | ;;; | |
493 | ||
494 | (define (list-index l k) | |
495 | (let loop ((n 0) | |
496 | (l l)) | |
497 | (and (not (null? l)) | |
498 | (if (eq? (car l) k) | |
499 | n | |
500 | (loop (+ n 1) (cdr l)))))) | |
501 | ||
1729d8ff | 502 | \f |
3d2ada2f | 503 | |
3e3cec45 | 504 | ;;; {and-map and or-map} |
0f2d19dd JB |
505 | ;;; |
506 | ;;; (and-map fn lst) is like (and (fn (car lst)) (fn (cadr lst)) (fn...) ...) | |
507 | ;;; (or-map fn lst) is like (or (fn (car lst)) (fn (cadr lst)) (fn...) ...) | |
0f2d19dd JB |
508 | ;;; |
509 | ||
510 | ;; and-map f l | |
511 | ;; | |
512 | ;; Apply f to successive elements of l until exhaustion or f returns #f. | |
513 | ;; If returning early, return #f. Otherwise, return the last value returned | |
514 | ;; by f. If f has never been called because l is empty, return #t. | |
20edfbbd | 515 | ;; |
0f2d19dd JB |
516 | (define (and-map f lst) |
517 | (let loop ((result #t) | |
518 | (l lst)) | |
519 | (and result | |
520 | (or (and (null? l) | |
521 | result) | |
522 | (loop (f (car l)) (cdr l)))))) | |
523 | ||
524 | ;; or-map f l | |
525 | ;; | |
526 | ;; Apply f to successive elements of l until exhaustion or while f returns #f. | |
527 | ;; If returning early, return the return value of f. | |
528 | ;; | |
529 | (define (or-map f lst) | |
530 | (let loop ((result #f) | |
531 | (l lst)) | |
532 | (or result | |
533 | (and (not (null? l)) | |
534 | (loop (f (car l)) (cdr l)))))) | |
535 | ||
59e1116d | 536 | \f |
0f2d19dd | 537 | |
52cfc69b GH |
538 | (if (provided? 'posix) |
539 | (primitive-load-path "ice-9/posix.scm")) | |
6fa8995c | 540 | |
52cfc69b GH |
541 | (if (provided? 'socket) |
542 | (primitive-load-path "ice-9/networking.scm")) | |
3afb28ce | 543 | |
f3197274 | 544 | ;; For reference, Emacs file-exists-p uses stat in this same way. |
833fc2f1 KR |
545 | ;; ENHANCE-ME: Catching an exception from stat is a bit wasteful, do this in |
546 | ;; C where all that's needed is to inspect the return from stat(). | |
6fa8995c | 547 | (define file-exists? |
52cfc69b | 548 | (if (provided? 'posix) |
6fa8995c | 549 | (lambda (str) |
833fc2f1 | 550 | (->bool (false-if-exception (stat str)))) |
6fa8995c GH |
551 | (lambda (str) |
552 | (let ((port (catch 'system-error (lambda () (open-file str OPEN_READ)) | |
553 | (lambda args #f)))) | |
554 | (if port (begin (close-port port) #t) | |
555 | #f))))) | |
556 | ||
557 | (define file-is-directory? | |
52cfc69b | 558 | (if (provided? 'posix) |
6fa8995c | 559 | (lambda (str) |
3afb28ce | 560 | (eq? (stat:type (stat str)) 'directory)) |
6fa8995c | 561 | (lambda (str) |
6fa8995c GH |
562 | (let ((port (catch 'system-error |
563 | (lambda () (open-file (string-append str "/.") | |
564 | OPEN_READ)) | |
565 | (lambda args #f)))) | |
566 | (if port (begin (close-port port) #t) | |
567 | #f))))) | |
0f2d19dd JB |
568 | |
569 | (define (has-suffix? str suffix) | |
570 | (let ((sufl (string-length suffix)) | |
571 | (sl (string-length str))) | |
572 | (and (> sl sufl) | |
573 | (string=? (substring str (- sl sufl) sl) suffix)))) | |
574 | ||
019ac1c9 MV |
575 | (define (system-error-errno args) |
576 | (if (eq? (car args) 'system-error) | |
577 | (car (list-ref args 4)) | |
578 | #f)) | |
579 | ||
0f2d19dd | 580 | \f |
3d2ada2f | 581 | |
0f2d19dd JB |
582 | ;;; {Error Handling} |
583 | ;;; | |
584 | ||
0f2d19dd | 585 | (define (error . args) |
21ed9efe | 586 | (save-stack) |
2194b6f0 | 587 | (if (null? args) |
5552355a | 588 | (scm-error 'misc-error #f "?" #f #f) |
8641dd9e | 589 | (let loop ((msg "~A") |
2194b6f0 GH |
590 | (rest (cdr args))) |
591 | (if (not (null? rest)) | |
8641dd9e | 592 | (loop (string-append msg " ~S") |
2194b6f0 | 593 | (cdr rest)) |
5552355a | 594 | (scm-error 'misc-error #f msg args #f))))) |
be2d2c70 | 595 | |
1349bd53 | 596 | ;; bad-throw is the hook that is called upon a throw to a an unhandled |
9a0d70e2 GH |
597 | ;; key (unless the throw has four arguments, in which case |
598 | ;; it's usually interpreted as an error throw.) | |
599 | ;; If the key has a default handler (a throw-handler-default property), | |
0f2d19dd JB |
600 | ;; it is applied to the throw. |
601 | ;; | |
1349bd53 | 602 | (define (bad-throw key . args) |
0f2d19dd JB |
603 | (let ((default (symbol-property key 'throw-handler-default))) |
604 | (or (and default (apply default key args)) | |
2194b6f0 | 605 | (apply error "unhandled-exception:" key args)))) |
0f2d19dd | 606 | |
0f2d19dd | 607 | \f |
bce074ee | 608 | |
708bf0f3 GH |
609 | (define (tm:sec obj) (vector-ref obj 0)) |
610 | (define (tm:min obj) (vector-ref obj 1)) | |
611 | (define (tm:hour obj) (vector-ref obj 2)) | |
612 | (define (tm:mday obj) (vector-ref obj 3)) | |
613 | (define (tm:mon obj) (vector-ref obj 4)) | |
614 | (define (tm:year obj) (vector-ref obj 5)) | |
615 | (define (tm:wday obj) (vector-ref obj 6)) | |
616 | (define (tm:yday obj) (vector-ref obj 7)) | |
617 | (define (tm:isdst obj) (vector-ref obj 8)) | |
618 | (define (tm:gmtoff obj) (vector-ref obj 9)) | |
619 | (define (tm:zone obj) (vector-ref obj 10)) | |
620 | ||
621 | (define (set-tm:sec obj val) (vector-set! obj 0 val)) | |
622 | (define (set-tm:min obj val) (vector-set! obj 1 val)) | |
623 | (define (set-tm:hour obj val) (vector-set! obj 2 val)) | |
624 | (define (set-tm:mday obj val) (vector-set! obj 3 val)) | |
625 | (define (set-tm:mon obj val) (vector-set! obj 4 val)) | |
626 | (define (set-tm:year obj val) (vector-set! obj 5 val)) | |
627 | (define (set-tm:wday obj val) (vector-set! obj 6 val)) | |
628 | (define (set-tm:yday obj val) (vector-set! obj 7 val)) | |
629 | (define (set-tm:isdst obj val) (vector-set! obj 8 val)) | |
630 | (define (set-tm:gmtoff obj val) (vector-set! obj 9 val)) | |
631 | (define (set-tm:zone obj val) (vector-set! obj 10 val)) | |
632 | ||
6afcd3b2 GH |
633 | (define (tms:clock obj) (vector-ref obj 0)) |
634 | (define (tms:utime obj) (vector-ref obj 1)) | |
635 | (define (tms:stime obj) (vector-ref obj 2)) | |
636 | (define (tms:cutime obj) (vector-ref obj 3)) | |
637 | (define (tms:cstime obj) (vector-ref obj 4)) | |
638 | ||
1334c61a GH |
639 | (define file-position ftell) |
640 | (define (file-set-position port offset . whence) | |
641 | (let ((whence (if (eq? whence '()) SEEK_SET (car whence)))) | |
642 | (seek port offset whence))) | |
8b13c6b3 | 643 | |
e38303a2 GH |
644 | (define (move->fdes fd/port fd) |
645 | (cond ((integer? fd/port) | |
7a6f1ffa | 646 | (dup->fdes fd/port fd) |
e38303a2 GH |
647 | (close fd/port) |
648 | fd) | |
649 | (else | |
650 | (primitive-move->fdes fd/port fd) | |
651 | (set-port-revealed! fd/port 1) | |
652 | fd/port))) | |
8b13c6b3 GH |
653 | |
654 | (define (release-port-handle port) | |
655 | (let ((revealed (port-revealed port))) | |
656 | (if (> revealed 0) | |
657 | (set-port-revealed! port (- revealed 1))))) | |
0f2d19dd | 658 | |
e38303a2 | 659 | (define (dup->port port/fd mode . maybe-fd) |
7a6f1ffa | 660 | (let ((port (fdopen (apply dup->fdes port/fd maybe-fd) |
e38303a2 GH |
661 | mode))) |
662 | (if (pair? maybe-fd) | |
663 | (set-port-revealed! port 1)) | |
664 | port)) | |
20edfbbd | 665 | |
e38303a2 GH |
666 | (define (dup->inport port/fd . maybe-fd) |
667 | (apply dup->port port/fd "r" maybe-fd)) | |
668 | ||
669 | (define (dup->outport port/fd . maybe-fd) | |
670 | (apply dup->port port/fd "w" maybe-fd)) | |
671 | ||
e38303a2 GH |
672 | (define (dup port/fd . maybe-fd) |
673 | (if (integer? port/fd) | |
674 | (apply dup->fdes port/fd maybe-fd) | |
675 | (apply dup->port port/fd (port-mode port/fd) maybe-fd))) | |
676 | ||
677 | (define (duplicate-port port modes) | |
678 | (dup->port port modes)) | |
679 | ||
680 | (define (fdes->inport fdes) | |
681 | (let loop ((rest-ports (fdes->ports fdes))) | |
682 | (cond ((null? rest-ports) | |
683 | (let ((result (fdopen fdes "r"))) | |
684 | (set-port-revealed! result 1) | |
685 | result)) | |
686 | ((input-port? (car rest-ports)) | |
687 | (set-port-revealed! (car rest-ports) | |
688 | (+ (port-revealed (car rest-ports)) 1)) | |
689 | (car rest-ports)) | |
690 | (else | |
691 | (loop (cdr rest-ports)))))) | |
692 | ||
693 | (define (fdes->outport fdes) | |
694 | (let loop ((rest-ports (fdes->ports fdes))) | |
695 | (cond ((null? rest-ports) | |
696 | (let ((result (fdopen fdes "w"))) | |
697 | (set-port-revealed! result 1) | |
698 | result)) | |
699 | ((output-port? (car rest-ports)) | |
700 | (set-port-revealed! (car rest-ports) | |
701 | (+ (port-revealed (car rest-ports)) 1)) | |
702 | (car rest-ports)) | |
703 | (else | |
704 | (loop (cdr rest-ports)))))) | |
705 | ||
706 | (define (port->fdes port) | |
707 | (set-port-revealed! port (+ (port-revealed port) 1)) | |
708 | (fileno port)) | |
709 | ||
956055a9 GH |
710 | (define (setenv name value) |
711 | (if value | |
712 | (putenv (string-append name "=" value)) | |
713 | (putenv name))) | |
714 | ||
5c1254da MV |
715 | (define (unsetenv name) |
716 | "Remove the entry for NAME from the environment." | |
717 | (putenv name)) | |
718 | ||
0f2d19dd | 719 | \f |
3d2ada2f | 720 | |
0f2d19dd JB |
721 | ;;; {Load Paths} |
722 | ;;; | |
723 | ||
0f2d19dd JB |
724 | ;;; Here for backward compatability |
725 | ;; | |
726 | (define scheme-file-suffix (lambda () ".scm")) | |
727 | ||
3cab8392 JB |
728 | (define (in-vicinity vicinity file) |
729 | (let ((tail (let ((len (string-length vicinity))) | |
534a0099 MD |
730 | (if (zero? len) |
731 | #f | |
3cab8392 JB |
732 | (string-ref vicinity (- len 1)))))) |
733 | (string-append vicinity | |
534a0099 MD |
734 | (if (or (not tail) |
735 | (eq? tail #\/)) | |
736 | "" | |
737 | "/") | |
3cab8392 | 738 | file))) |
02ceadb8 | 739 | |
0f2d19dd | 740 | \f |
3d2ada2f | 741 | |
ef00e7f4 | 742 | ;;; {Help for scm_shell} |
3d2ada2f | 743 | ;;; |
ef00e7f4 JB |
744 | ;;; The argument-processing code used by Guile-based shells generates |
745 | ;;; Scheme code based on the argument list. This page contains help | |
746 | ;;; functions for the code it generates. | |
3d2ada2f | 747 | ;;; |
ef00e7f4 | 748 | |
ef00e7f4 JB |
749 | (define (command-line) (program-arguments)) |
750 | ||
5aa7fe69 JB |
751 | ;; This is mostly for the internal use of the code generated by |
752 | ;; scm_compile_shell_switches. | |
eef6519b MV |
753 | |
754 | (define (turn-on-debugging) | |
755 | (debug-enable 'debug) | |
756 | (debug-enable 'backtrace) | |
757 | (read-enable 'positions)) | |
4eecfeb7 | 758 | |
ef00e7f4 | 759 | (define (load-user-init) |
1f08acd9 GH |
760 | (let* ((home (or (getenv "HOME") |
761 | (false-if-exception (passwd:dir (getpwuid (getuid)))) | |
762 | "/")) ;; fallback for cygwin etc. | |
763 | (init-file (in-vicinity home ".guile"))) | |
764 | (if (file-exists? init-file) | |
765 | (primitive-load init-file)))) | |
ef00e7f4 JB |
766 | |
767 | \f | |
3d2ada2f | 768 | |
a06181a2 | 769 | ;;; {Loading by paths} |
3d2ada2f | 770 | ;;; |
a06181a2 JB |
771 | |
772 | ;;; Load a Scheme source file named NAME, searching for it in the | |
773 | ;;; directories listed in %load-path, and applying each of the file | |
774 | ;;; name extensions listed in %load-extensions. | |
775 | (define (load-from-path name) | |
776 | (start-stack 'load-stack | |
75a97b92 | 777 | (primitive-load-path name))) |
0f2d19dd | 778 | |
5552355a | 779 | |
0f2d19dd | 780 | \f |
3d2ada2f | 781 | |
0f2d19dd JB |
782 | ;;; {Transcendental Functions} |
783 | ;;; | |
784 | ;;; Derived from "Transcen.scm", Complex trancendental functions for SCM. | |
0543c9b7 | 785 | ;;; Written by Jerry D. Hedden, (C) FSF. |
0f2d19dd JB |
786 | ;;; See the file `COPYING' for terms applying to this program. |
787 | ;;; | |
788 | ||
0f2d19dd JB |
789 | (define expt |
790 | (let ((integer-expt integer-expt)) | |
791 | (lambda (z1 z2) | |
bdb112ea MV |
792 | (cond ((and (exact? z2) (integer? z2)) |
793 | (integer-expt z1 z2)) | |
0f2d19dd JB |
794 | ((and (real? z2) (real? z1) (>= z1 0)) |
795 | ($expt z1 z2)) | |
796 | (else | |
797 | (exp (* z2 (log z1)))))))) | |
798 | ||
799 | (define (sinh z) | |
800 | (if (real? z) ($sinh z) | |
801 | (let ((x (real-part z)) (y (imag-part z))) | |
802 | (make-rectangular (* ($sinh x) ($cos y)) | |
803 | (* ($cosh x) ($sin y)))))) | |
804 | (define (cosh z) | |
805 | (if (real? z) ($cosh z) | |
806 | (let ((x (real-part z)) (y (imag-part z))) | |
807 | (make-rectangular (* ($cosh x) ($cos y)) | |
808 | (* ($sinh x) ($sin y)))))) | |
809 | (define (tanh z) | |
810 | (if (real? z) ($tanh z) | |
811 | (let* ((x (* 2 (real-part z))) | |
812 | (y (* 2 (imag-part z))) | |
813 | (w (+ ($cosh x) ($cos y)))) | |
814 | (make-rectangular (/ ($sinh x) w) (/ ($sin y) w))))) | |
815 | ||
816 | (define (asinh z) | |
817 | (if (real? z) ($asinh z) | |
818 | (log (+ z (sqrt (+ (* z z) 1)))))) | |
819 | ||
820 | (define (acosh z) | |
821 | (if (and (real? z) (>= z 1)) | |
822 | ($acosh z) | |
823 | (log (+ z (sqrt (- (* z z) 1)))))) | |
824 | ||
825 | (define (atanh z) | |
826 | (if (and (real? z) (> z -1) (< z 1)) | |
827 | ($atanh z) | |
828 | (/ (log (/ (+ 1 z) (- 1 z))) 2))) | |
829 | ||
830 | (define (sin z) | |
831 | (if (real? z) ($sin z) | |
832 | (let ((x (real-part z)) (y (imag-part z))) | |
833 | (make-rectangular (* ($sin x) ($cosh y)) | |
834 | (* ($cos x) ($sinh y)))))) | |
835 | (define (cos z) | |
836 | (if (real? z) ($cos z) | |
837 | (let ((x (real-part z)) (y (imag-part z))) | |
838 | (make-rectangular (* ($cos x) ($cosh y)) | |
839 | (- (* ($sin x) ($sinh y))))))) | |
840 | (define (tan z) | |
841 | (if (real? z) ($tan z) | |
842 | (let* ((x (* 2 (real-part z))) | |
843 | (y (* 2 (imag-part z))) | |
844 | (w (+ ($cos x) ($cosh y)))) | |
845 | (make-rectangular (/ ($sin x) w) (/ ($sinh y) w))))) | |
846 | ||
847 | (define (asin z) | |
848 | (if (and (real? z) (>= z -1) (<= z 1)) | |
849 | ($asin z) | |
850 | (* -i (asinh (* +i z))))) | |
851 | ||
852 | (define (acos z) | |
853 | (if (and (real? z) (>= z -1) (<= z 1)) | |
854 | ($acos z) | |
855 | (+ (/ (angle -1) 2) (* +i (asinh (* +i z)))))) | |
856 | ||
857 | (define (atan z . y) | |
858 | (if (null? y) | |
859 | (if (real? z) ($atan z) | |
860 | (/ (log (/ (- +i z) (+ +i z))) +2i)) | |
861 | ($atan2 z (car y)))) | |
862 | ||
0f2d19dd | 863 | \f |
0f2d19dd JB |
864 | |
865 | ;;; {Reader Extensions} | |
866 | ;;; | |
0f2d19dd JB |
867 | ;;; Reader code for various "#c" forms. |
868 | ;;; | |
869 | ||
75a97b92 GH |
870 | (read-hash-extend #\' (lambda (c port) |
871 | (read port))) | |
600c9584 RB |
872 | |
873 | (define read-eval? (make-fluid)) | |
874 | (fluid-set! read-eval? #f) | |
875 | (read-hash-extend #\. | |
876 | (lambda (c port) | |
877 | (if (fluid-ref read-eval?) | |
878 | (eval (read port) (interaction-environment)) | |
879 | (error | |
71335c0d | 880 | "#. read expansion found and read-eval? is #f.")))) |
75a97b92 | 881 | |
0f2d19dd | 882 | \f |
3d2ada2f | 883 | |
0f2d19dd JB |
884 | ;;; {Command Line Options} |
885 | ;;; | |
886 | ||
887 | (define (get-option argv kw-opts kw-args return) | |
888 | (cond | |
889 | ((null? argv) | |
890 | (return #f #f argv)) | |
891 | ||
892 | ((or (not (eq? #\- (string-ref (car argv) 0))) | |
893 | (eq? (string-length (car argv)) 1)) | |
894 | (return 'normal-arg (car argv) (cdr argv))) | |
895 | ||
896 | ((eq? #\- (string-ref (car argv) 1)) | |
897 | (let* ((kw-arg-pos (or (string-index (car argv) #\=) | |
898 | (string-length (car argv)))) | |
899 | (kw (symbol->keyword (substring (car argv) 2 kw-arg-pos))) | |
900 | (kw-opt? (member kw kw-opts)) | |
901 | (kw-arg? (member kw kw-args)) | |
902 | (arg (or (and (not (eq? kw-arg-pos (string-length (car argv)))) | |
903 | (substring (car argv) | |
904 | (+ kw-arg-pos 1) | |
905 | (string-length (car argv)))) | |
906 | (and kw-arg? | |
907 | (begin (set! argv (cdr argv)) (car argv)))))) | |
908 | (if (or kw-opt? kw-arg?) | |
909 | (return kw arg (cdr argv)) | |
910 | (return 'usage-error kw (cdr argv))))) | |
911 | ||
912 | (else | |
913 | (let* ((char (substring (car argv) 1 2)) | |
914 | (kw (symbol->keyword char))) | |
915 | (cond | |
916 | ||
917 | ((member kw kw-opts) | |
918 | (let* ((rest-car (substring (car argv) 2 (string-length (car argv)))) | |
919 | (new-argv (if (= 0 (string-length rest-car)) | |
920 | (cdr argv) | |
921 | (cons (string-append "-" rest-car) (cdr argv))))) | |
922 | (return kw #f new-argv))) | |
923 | ||
924 | ((member kw kw-args) | |
925 | (let* ((rest-car (substring (car argv) 2 (string-length (car argv)))) | |
926 | (arg (if (= 0 (string-length rest-car)) | |
927 | (cadr argv) | |
928 | rest-car)) | |
929 | (new-argv (if (= 0 (string-length rest-car)) | |
930 | (cddr argv) | |
931 | (cdr argv)))) | |
932 | (return kw arg new-argv))) | |
933 | ||
934 | (else (return 'usage-error kw argv))))))) | |
935 | ||
936 | (define (for-next-option proc argv kw-opts kw-args) | |
937 | (let loop ((argv argv)) | |
938 | (get-option argv kw-opts kw-args | |
939 | (lambda (opt opt-arg argv) | |
940 | (and opt (proc opt opt-arg argv loop)))))) | |
941 | ||
942 | (define (display-usage-report kw-desc) | |
943 | (for-each | |
944 | (lambda (kw) | |
945 | (or (eq? (car kw) #t) | |
946 | (eq? (car kw) 'else) | |
947 | (let* ((opt-desc kw) | |
948 | (help (cadr opt-desc)) | |
949 | (opts (car opt-desc)) | |
950 | (opts-proper (if (string? (car opts)) (cdr opts) opts)) | |
951 | (arg-name (if (string? (car opts)) | |
952 | (string-append "<" (car opts) ">") | |
953 | "")) | |
954 | (left-part (string-append | |
955 | (with-output-to-string | |
956 | (lambda () | |
297775ce | 957 | (map (lambda (x) (display (keyword->symbol x)) (display " ")) |
0f2d19dd JB |
958 | opts-proper))) |
959 | arg-name)) | |
11b05261 MD |
960 | (middle-part (if (and (< (string-length left-part) 30) |
961 | (< (string-length help) 40)) | |
962 | (make-string (- 30 (string-length left-part)) #\ ) | |
0f2d19dd JB |
963 | "\n\t"))) |
964 | (display left-part) | |
965 | (display middle-part) | |
966 | (display help) | |
967 | (newline)))) | |
968 | kw-desc)) | |
0f2d19dd | 969 | |
20edfbbd TTN |
970 | |
971 | ||
0f2d19dd JB |
972 | (define (transform-usage-lambda cases) |
973 | (let* ((raw-usage (delq! 'else (map car cases))) | |
974 | (usage-sans-specials (map (lambda (x) | |
975 | (or (and (not (list? x)) x) | |
976 | (and (symbol? (car x)) #t) | |
977 | (and (boolean? (car x)) #t) | |
978 | x)) | |
979 | raw-usage)) | |
ed440df5 | 980 | (usage-desc (delq! #t usage-sans-specials)) |
0f2d19dd JB |
981 | (kw-desc (map car usage-desc)) |
982 | (kw-opts (apply append (map (lambda (x) (and (not (string? (car x))) x)) kw-desc))) | |
983 | (kw-args (apply append (map (lambda (x) (and (string? (car x)) (cdr x))) kw-desc))) | |
984 | (transmogrified-cases (map (lambda (case) | |
985 | (cons (let ((opts (car case))) | |
986 | (if (or (boolean? opts) (eq? 'else opts)) | |
987 | opts | |
988 | (cond | |
989 | ((symbol? (car opts)) opts) | |
990 | ((boolean? (car opts)) opts) | |
991 | ((string? (caar opts)) (cdar opts)) | |
992 | (else (car opts))))) | |
993 | (cdr case))) | |
994 | cases))) | |
995 | `(let ((%display-usage (lambda () (display-usage-report ',usage-desc)))) | |
996 | (lambda (%argv) | |
997 | (let %next-arg ((%argv %argv)) | |
998 | (get-option %argv | |
999 | ',kw-opts | |
1000 | ',kw-args | |
1001 | (lambda (%opt %arg %new-argv) | |
1002 | (case %opt | |
1003 | ,@ transmogrified-cases)))))))) | |
1004 | ||
1005 | ||
1006 | \f | |
1007 | ||
1008 | ;;; {Low Level Modules} | |
1009 | ;;; | |
1010 | ;;; These are the low level data structures for modules. | |
1011 | ;;; | |
37f5dfe5 DH |
1012 | ;;; Every module object is of the type 'module-type', which is a record |
1013 | ;;; consisting of the following members: | |
1014 | ;;; | |
1015 | ;;; - eval-closure: the function that defines for its module the strategy that | |
1016 | ;;; shall be followed when looking up symbols in the module. | |
1017 | ;;; | |
1018 | ;;; An eval-closure is a function taking two arguments: the symbol to be | |
1019 | ;;; looked up and a boolean value telling whether a binding for the symbol | |
1020 | ;;; should be created if it does not exist yet. If the symbol lookup | |
1021 | ;;; succeeded (either because an existing binding was found or because a new | |
1022 | ;;; binding was created), a variable object representing the binding is | |
1023 | ;;; returned. Otherwise, the value #f is returned. Note that the eval | |
1024 | ;;; closure does not take the module to be searched as an argument: During | |
1025 | ;;; construction of the eval-closure, the eval-closure has to store the | |
1026 | ;;; module it belongs to in its environment. This means, that any | |
1027 | ;;; eval-closure can belong to only one module. | |
1028 | ;;; | |
1029 | ;;; The eval-closure of a module can be defined arbitrarily. However, three | |
1030 | ;;; special cases of eval-closures are to be distinguished: During startup | |
1031 | ;;; the module system is not yet activated. In this phase, no modules are | |
1032 | ;;; defined and all bindings are automatically stored by the system in the | |
1033 | ;;; pre-modules-obarray. Since no eval-closures exist at this time, the | |
1034 | ;;; functions which require an eval-closure as their argument need to be | |
1035 | ;;; passed the value #f. | |
1036 | ;;; | |
1037 | ;;; The other two special cases of eval-closures are the | |
1038 | ;;; standard-eval-closure and the standard-interface-eval-closure. Both | |
1039 | ;;; behave equally for the case that no new binding is to be created. The | |
1040 | ;;; difference between the two comes in, when the boolean argument to the | |
1041 | ;;; eval-closure indicates that a new binding shall be created if it is not | |
1042 | ;;; found. | |
1043 | ;;; | |
1044 | ;;; Given that no new binding shall be created, both standard eval-closures | |
1045 | ;;; define the following standard strategy of searching bindings in the | |
1046 | ;;; module: First, the module's obarray is searched for the symbol. Second, | |
1047 | ;;; if no binding for the symbol was found in the module's obarray, the | |
1048 | ;;; module's binder procedure is exececuted. If this procedure did not | |
1049 | ;;; return a binding for the symbol, the modules referenced in the module's | |
1050 | ;;; uses list are recursively searched for a binding of the symbol. If the | |
1051 | ;;; binding can not be found in these modules also, the symbol lookup has | |
1052 | ;;; failed. | |
1053 | ;;; | |
1054 | ;;; If a new binding shall be created, the standard-interface-eval-closure | |
1055 | ;;; immediately returns indicating failure. That is, it does not even try | |
1056 | ;;; to look up the symbol. In contrast, the standard-eval-closure would | |
1057 | ;;; first search the obarray, and if no binding was found there, would | |
1058 | ;;; create a new binding in the obarray, therefore not calling the binder | |
1059 | ;;; procedure or searching the modules in the uses list. | |
1060 | ;;; | |
1061 | ;;; The explanation of the following members obarray, binder and uses | |
1062 | ;;; assumes that the symbol lookup follows the strategy that is defined in | |
1063 | ;;; the standard-eval-closure and the standard-interface-eval-closure. | |
1064 | ;;; | |
1065 | ;;; - obarray: a hash table that maps symbols to variable objects. In this | |
1066 | ;;; hash table, the definitions are found that are local to the module (that | |
1067 | ;;; is, not imported from other modules). When looking up bindings in the | |
1068 | ;;; module, this hash table is searched first. | |
1069 | ;;; | |
1070 | ;;; - binder: either #f or a function taking a module and a symbol argument. | |
1071 | ;;; If it is a function it is called after the obarray has been | |
1072 | ;;; unsuccessfully searched for a binding. It then can provide bindings | |
1073 | ;;; that would otherwise not be found locally in the module. | |
1074 | ;;; | |
1075 | ;;; - uses: a list of modules from which non-local bindings can be inherited. | |
1076 | ;;; These modules are the third place queried for bindings after the obarray | |
1077 | ;;; has been unsuccessfully searched and the binder function did not deliver | |
1078 | ;;; a result either. | |
1079 | ;;; | |
1080 | ;;; - transformer: either #f or a function taking a scheme expression as | |
1081 | ;;; delivered by read. If it is a function, it will be called to perform | |
1082 | ;;; syntax transformations (e. g. makro expansion) on the given scheme | |
1083 | ;;; expression. The output of the transformer function will then be passed | |
1084 | ;;; to Guile's internal memoizer. This means that the output must be valid | |
1085 | ;;; scheme code. The only exception is, that the output may make use of the | |
1086 | ;;; syntax extensions provided to identify the modules that a binding | |
1087 | ;;; belongs to. | |
1088 | ;;; | |
1089 | ;;; - name: the name of the module. This is used for all kinds of printing | |
1090 | ;;; outputs. In certain places the module name also serves as a way of | |
1091 | ;;; identification. When adding a module to the uses list of another | |
1092 | ;;; module, it is made sure that the new uses list will not contain two | |
1093 | ;;; modules of the same name. | |
1094 | ;;; | |
1095 | ;;; - kind: classification of the kind of module. The value is (currently?) | |
1096 | ;;; only used for printing. It has no influence on how a module is treated. | |
1097 | ;;; Currently the following values are used when setting the module kind: | |
1098 | ;;; 'module, 'directory, 'interface, 'custom-interface. If no explicit kind | |
1099 | ;;; is set, it defaults to 'module. | |
1100 | ;;; | |
1101 | ;;; - duplicates-handlers | |
1102 | ;;; | |
1103 | ;;; - duplicates-interface | |
1104 | ;;; | |
1105 | ;;; - observers | |
1106 | ;;; | |
1107 | ;;; - weak-observers | |
1108 | ;;; | |
1109 | ;;; - observer-id | |
1110 | ;;; | |
1111 | ;;; In addition, the module may (must?) contain a binding for | |
1112 | ;;; %module-public-interface... More explanations here... | |
1113 | ;;; | |
0f2d19dd JB |
1114 | ;;; !!! warning: The interface to lazy binder procedures is going |
1115 | ;;; to be changed in an incompatible way to permit all the basic | |
1116 | ;;; module ops to be virtualized. | |
1117 | ;;; | |
1118 | ;;; (make-module size use-list lazy-binding-proc) => module | |
1119 | ;;; module-{obarray,uses,binder}[|-set!] | |
1120 | ;;; (module? obj) => [#t|#f] | |
1121 | ;;; (module-locally-bound? module symbol) => [#t|#f] | |
1122 | ;;; (module-bound? module symbol) => [#t|#f] | |
1123 | ;;; (module-symbol-locally-interned? module symbol) => [#t|#f] | |
1124 | ;;; (module-symbol-interned? module symbol) => [#t|#f] | |
1125 | ;;; (module-local-variable module symbol) => [#<variable ...> | #f] | |
1126 | ;;; (module-variable module symbol) => [#<variable ...> | #f] | |
1127 | ;;; (module-symbol-binding module symbol opt-value) | |
1128 | ;;; => [ <obj> | opt-value | an error occurs ] | |
1129 | ;;; (module-make-local-var! module symbol) => #<variable...> | |
1130 | ;;; (module-add! module symbol var) => unspecified | |
1131 | ;;; (module-remove! module symbol) => unspecified | |
1132 | ;;; (module-for-each proc module) => unspecified | |
1133 | ;;; (make-scm-module) => module ; a lazy copy of the symhash module | |
1134 | ;;; (set-current-module module) => unspecified | |
1135 | ;;; (current-module) => #<module...> | |
1136 | ;;; | |
1137 | ;;; | |
1138 | ||
1139 | \f | |
3d2ada2f | 1140 | |
44cf1f0f | 1141 | ;;; {Printing Modules} |
3d2ada2f DH |
1142 | ;;; |
1143 | ||
44cf1f0f | 1144 | ;; This is how modules are printed. You can re-define it. |
fa7e9274 MV |
1145 | ;; (Redefining is actually more complicated than simply redefining |
1146 | ;; %print-module because that would only change the binding and not | |
1147 | ;; the value stored in the vtable that determines how record are | |
1148 | ;; printed. Sigh.) | |
1149 | ||
1150 | (define (%print-module mod port) ; unused args: depth length style table) | |
0f2d19dd JB |
1151 | (display "#<" port) |
1152 | (display (or (module-kind mod) "module") port) | |
1153 | (let ((name (module-name mod))) | |
1154 | (if name | |
1155 | (begin | |
1156 | (display " " port) | |
1157 | (display name port)))) | |
1158 | (display " " port) | |
1159 | (display (number->string (object-address mod) 16) port) | |
1160 | (display ">" port)) | |
1161 | ||
1162 | ;; module-type | |
1163 | ;; | |
1164 | ;; A module is characterized by an obarray in which local symbols | |
1165 | ;; are interned, a list of modules, "uses", from which non-local | |
1166 | ;; bindings can be inherited, and an optional lazy-binder which | |
31d50456 | 1167 | ;; is a (CLOSURE module symbol) which, as a last resort, can provide |
0f2d19dd JB |
1168 | ;; bindings that would otherwise not be found locally in the module. |
1169 | ;; | |
3d2ada2f DH |
1170 | ;; NOTE: If you change anything here, you also need to change |
1171 | ;; libguile/modules.h. | |
d7faeb2e | 1172 | ;; |
0f2d19dd | 1173 | (define module-type |
7a0ff2f8 | 1174 | (make-record-type 'module |
1777c18b | 1175 | '(obarray uses binder eval-closure transformer name kind |
8d8dac1f MD |
1176 | duplicates-handlers duplicates-interface |
1177 | observers weak-observers observer-id) | |
8b718458 | 1178 | %print-module)) |
0f2d19dd | 1179 | |
8b718458 | 1180 | ;; make-module &opt size uses binder |
0f2d19dd | 1181 | ;; |
8b718458 JB |
1182 | ;; Create a new module, perhaps with a particular size of obarray, |
1183 | ;; initial uses list, or binding procedure. | |
0f2d19dd | 1184 | ;; |
0f2d19dd JB |
1185 | (define make-module |
1186 | (lambda args | |
0f2d19dd | 1187 | |
8b718458 JB |
1188 | (define (parse-arg index default) |
1189 | (if (> (length args) index) | |
1190 | (list-ref args index) | |
1191 | default)) | |
1192 | ||
1193 | (if (> (length args) 3) | |
1194 | (error "Too many args to make-module." args)) | |
0f2d19dd | 1195 | |
231a4ea8 | 1196 | (let ((size (parse-arg 0 31)) |
8b718458 JB |
1197 | (uses (parse-arg 1 '())) |
1198 | (binder (parse-arg 2 #f))) | |
0f2d19dd | 1199 | |
8b718458 JB |
1200 | (if (not (integer? size)) |
1201 | (error "Illegal size to make-module." size)) | |
1202 | (if (not (and (list? uses) | |
1203 | (and-map module? uses))) | |
1204 | (error "Incorrect use list." uses)) | |
0f2d19dd JB |
1205 | (if (and binder (not (procedure? binder))) |
1206 | (error | |
1207 | "Lazy-binder expected to be a procedure or #f." binder)) | |
1208 | ||
eb84efa1 | 1209 | (let ((module (module-constructor (make-hash-table size) |
8d8dac1f | 1210 | uses binder #f #f #f #f #f #f |
1777c18b MD |
1211 | '() |
1212 | (make-weak-value-hash-table 31) | |
1213 | 0))) | |
8b718458 JB |
1214 | |
1215 | ;; We can't pass this as an argument to module-constructor, | |
1216 | ;; because we need it to close over a pointer to the module | |
1217 | ;; itself. | |
6906bd0d | 1218 | (set-module-eval-closure! module (standard-eval-closure module)) |
8b718458 JB |
1219 | |
1220 | module)))) | |
0f2d19dd | 1221 | |
8b718458 | 1222 | (define module-constructor (record-constructor module-type)) |
0f2d19dd JB |
1223 | (define module-obarray (record-accessor module-type 'obarray)) |
1224 | (define set-module-obarray! (record-modifier module-type 'obarray)) | |
1225 | (define module-uses (record-accessor module-type 'uses)) | |
1226 | (define set-module-uses! (record-modifier module-type 'uses)) | |
1227 | (define module-binder (record-accessor module-type 'binder)) | |
1228 | (define set-module-binder! (record-modifier module-type 'binder)) | |
631c1902 MD |
1229 | |
1230 | ;; NOTE: This binding is used in libguile/modules.c. | |
31d50456 | 1231 | (define module-eval-closure (record-accessor module-type 'eval-closure)) |
631c1902 | 1232 | |
7a0ff2f8 MD |
1233 | (define module-transformer (record-accessor module-type 'transformer)) |
1234 | (define set-module-transformer! (record-modifier module-type 'transformer)) | |
0f2d19dd JB |
1235 | (define module-name (record-accessor module-type 'name)) |
1236 | (define set-module-name! (record-modifier module-type 'name)) | |
1237 | (define module-kind (record-accessor module-type 'kind)) | |
1238 | (define set-module-kind! (record-modifier module-type 'kind)) | |
8d8dac1f MD |
1239 | (define module-duplicates-handlers |
1240 | (record-accessor module-type 'duplicates-handlers)) | |
1241 | (define set-module-duplicates-handlers! | |
1242 | (record-modifier module-type 'duplicates-handlers)) | |
1243 | (define module-duplicates-interface | |
1244 | (record-accessor module-type 'duplicates-interface)) | |
1245 | (define set-module-duplicates-interface! | |
1246 | (record-modifier module-type 'duplicates-interface)) | |
1777c18b MD |
1247 | (define module-observers (record-accessor module-type 'observers)) |
1248 | (define set-module-observers! (record-modifier module-type 'observers)) | |
1249 | (define module-weak-observers (record-accessor module-type 'weak-observers)) | |
1250 | (define module-observer-id (record-accessor module-type 'observer-id)) | |
1251 | (define set-module-observer-id! (record-modifier module-type 'observer-id)) | |
0f2d19dd JB |
1252 | (define module? (record-predicate module-type)) |
1253 | ||
edc185c7 MD |
1254 | (define set-module-eval-closure! |
1255 | (let ((setter (record-modifier module-type 'eval-closure))) | |
1256 | (lambda (module closure) | |
1257 | (setter module closure) | |
6169fe26 MV |
1258 | ;; Make it possible to lookup the module from the environment. |
1259 | ;; This implementation is correct since an eval closure can belong | |
1260 | ;; to maximally one module. | |
1261 | (set-procedure-property! closure 'module module)))) | |
8b718458 | 1262 | |
0f2d19dd | 1263 | \f |
3d2ada2f | 1264 | |
1777c18b MD |
1265 | ;;; {Observer protocol} |
1266 | ;;; | |
1267 | ||
1268 | (define (module-observe module proc) | |
1269 | (set-module-observers! module (cons proc (module-observers module))) | |
1270 | (cons module proc)) | |
1271 | ||
1272 | (define (module-observe-weak module proc) | |
1273 | (let ((id (module-observer-id module))) | |
1274 | (hash-set! (module-weak-observers module) id proc) | |
1275 | (set-module-observer-id! module (+ 1 id)) | |
1276 | (cons module id))) | |
1277 | ||
1278 | (define (module-unobserve token) | |
1279 | (let ((module (car token)) | |
1280 | (id (cdr token))) | |
1281 | (if (integer? id) | |
1282 | (hash-remove! (module-weak-observers module) id) | |
1283 | (set-module-observers! module (delq1! id (module-observers module))))) | |
1284 | *unspecified*) | |
1285 | ||
d57da08b MD |
1286 | (define module-defer-observers #f) |
1287 | (define module-defer-observers-mutex (make-mutex)) | |
1288 | (define module-defer-observers-table (make-hash-table)) | |
1289 | ||
1a961d7e | 1290 | (define (module-modified m) |
d57da08b MD |
1291 | (if module-defer-observers |
1292 | (hash-set! module-defer-observers-table m #t) | |
1293 | (module-call-observers m))) | |
1294 | ||
1295 | ;;; This function can be used to delay calls to observers so that they | |
1296 | ;;; can be called once only in the face of massive updating of modules. | |
1297 | ;;; | |
1298 | (define (call-with-deferred-observers thunk) | |
1299 | (dynamic-wind | |
1300 | (lambda () | |
1301 | (lock-mutex module-defer-observers-mutex) | |
1302 | (set! module-defer-observers #t)) | |
1303 | thunk | |
1304 | (lambda () | |
1305 | (set! module-defer-observers #f) | |
1306 | (hash-for-each (lambda (m dummy) | |
1307 | (module-call-observers m)) | |
1308 | module-defer-observers-table) | |
1309 | (hash-clear! module-defer-observers-table) | |
1310 | (unlock-mutex module-defer-observers-mutex)))) | |
1311 | ||
1312 | (define (module-call-observers m) | |
1777c18b MD |
1313 | (for-each (lambda (proc) (proc m)) (module-observers m)) |
1314 | (hash-fold (lambda (id proc res) (proc m)) #f (module-weak-observers m))) | |
1315 | ||
1316 | \f | |
3d2ada2f | 1317 | |
0f2d19dd JB |
1318 | ;;; {Module Searching in General} |
1319 | ;;; | |
1320 | ;;; We sometimes want to look for properties of a symbol | |
1321 | ;;; just within the obarray of one module. If the property | |
1322 | ;;; holds, then it is said to hold ``locally'' as in, ``The symbol | |
1323 | ;;; DISPLAY is locally rebound in the module `safe-guile'.'' | |
1324 | ;;; | |
1325 | ;;; | |
1326 | ;;; Other times, we want to test for a symbol property in the obarray | |
1327 | ;;; of M and, if it is not found there, try each of the modules in the | |
1328 | ;;; uses list of M. This is the normal way of testing for some | |
1329 | ;;; property, so we state these properties without qualification as | |
1330 | ;;; in: ``The symbol 'fnord is interned in module M because it is | |
1331 | ;;; interned locally in module M2 which is a member of the uses list | |
1332 | ;;; of M.'' | |
1333 | ;;; | |
1334 | ||
1335 | ;; module-search fn m | |
20edfbbd | 1336 | ;; |
0f2d19dd JB |
1337 | ;; return the first non-#f result of FN applied to M and then to |
1338 | ;; the modules in the uses of m, and so on recursively. If all applications | |
1339 | ;; return #f, then so does this function. | |
1340 | ;; | |
1341 | (define (module-search fn m v) | |
1342 | (define (loop pos) | |
1343 | (and (pair? pos) | |
1344 | (or (module-search fn (car pos) v) | |
1345 | (loop (cdr pos))))) | |
1346 | (or (fn m v) | |
1347 | (loop (module-uses m)))) | |
1348 | ||
1349 | ||
1350 | ;;; {Is a symbol bound in a module?} | |
1351 | ;;; | |
1352 | ;;; Symbol S in Module M is bound if S is interned in M and if the binding | |
1353 | ;;; of S in M has been set to some well-defined value. | |
1354 | ;;; | |
1355 | ||
1356 | ;; module-locally-bound? module symbol | |
1357 | ;; | |
1358 | ;; Is a symbol bound (interned and defined) locally in a given module? | |
1359 | ;; | |
1360 | (define (module-locally-bound? m v) | |
1361 | (let ((var (module-local-variable m v))) | |
1362 | (and var | |
1363 | (variable-bound? var)))) | |
1364 | ||
1365 | ;; module-bound? module symbol | |
1366 | ;; | |
1367 | ;; Is a symbol bound (interned and defined) anywhere in a given module | |
1368 | ;; or its uses? | |
1369 | ;; | |
1370 | (define (module-bound? m v) | |
1371 | (module-search module-locally-bound? m v)) | |
1372 | ||
1373 | ;;; {Is a symbol interned in a module?} | |
1374 | ;;; | |
20edfbbd | 1375 | ;;; Symbol S in Module M is interned if S occurs in |
0f2d19dd JB |
1376 | ;;; of S in M has been set to some well-defined value. |
1377 | ;;; | |
1378 | ;;; It is possible to intern a symbol in a module without providing | |
1379 | ;;; an initial binding for the corresponding variable. This is done | |
1380 | ;;; with: | |
1381 | ;;; (module-add! module symbol (make-undefined-variable)) | |
1382 | ;;; | |
1383 | ;;; In that case, the symbol is interned in the module, but not | |
1384 | ;;; bound there. The unbound symbol shadows any binding for that | |
1385 | ;;; symbol that might otherwise be inherited from a member of the uses list. | |
1386 | ;;; | |
1387 | ||
1388 | (define (module-obarray-get-handle ob key) | |
1389 | ((if (symbol? key) hashq-get-handle hash-get-handle) ob key)) | |
1390 | ||
1391 | (define (module-obarray-ref ob key) | |
1392 | ((if (symbol? key) hashq-ref hash-ref) ob key)) | |
1393 | ||
1394 | (define (module-obarray-set! ob key val) | |
1395 | ((if (symbol? key) hashq-set! hash-set!) ob key val)) | |
1396 | ||
1397 | (define (module-obarray-remove! ob key) | |
1398 | ((if (symbol? key) hashq-remove! hash-remove!) ob key)) | |
1399 | ||
1400 | ;; module-symbol-locally-interned? module symbol | |
20edfbbd | 1401 | ;; |
0f2d19dd JB |
1402 | ;; is a symbol interned (not neccessarily defined) locally in a given module |
1403 | ;; or its uses? Interned symbols shadow inherited bindings even if | |
1404 | ;; they are not themselves bound to a defined value. | |
1405 | ;; | |
1406 | (define (module-symbol-locally-interned? m v) | |
1407 | (not (not (module-obarray-get-handle (module-obarray m) v)))) | |
1408 | ||
1409 | ;; module-symbol-interned? module symbol | |
20edfbbd | 1410 | ;; |
0f2d19dd JB |
1411 | ;; is a symbol interned (not neccessarily defined) anywhere in a given module |
1412 | ;; or its uses? Interned symbols shadow inherited bindings even if | |
1413 | ;; they are not themselves bound to a defined value. | |
1414 | ;; | |
1415 | (define (module-symbol-interned? m v) | |
1416 | (module-search module-symbol-locally-interned? m v)) | |
1417 | ||
1418 | ||
1419 | ;;; {Mapping modules x symbols --> variables} | |
1420 | ;;; | |
1421 | ||
1422 | ;; module-local-variable module symbol | |
1423 | ;; return the local variable associated with a MODULE and SYMBOL. | |
1424 | ;; | |
1425 | ;;; This function is very important. It is the only function that can | |
1426 | ;;; return a variable from a module other than the mutators that store | |
1427 | ;;; new variables in modules. Therefore, this function is the location | |
1428 | ;;; of the "lazy binder" hack. | |
1429 | ;;; | |
1430 | ;;; If symbol is defined in MODULE, and if the definition binds symbol | |
1431 | ;;; to a variable, return that variable object. | |
1432 | ;;; | |
1433 | ;;; If the symbols is not found at first, but the module has a lazy binder, | |
1434 | ;;; then try the binder. | |
1435 | ;;; | |
1436 | ;;; If the symbol is not found at all, return #f. | |
1437 | ;;; | |
1438 | (define (module-local-variable m v) | |
6fa8995c GH |
1439 | ; (caddr |
1440 | ; (list m v | |
0f2d19dd JB |
1441 | (let ((b (module-obarray-ref (module-obarray m) v))) |
1442 | (or (and (variable? b) b) | |
1443 | (and (module-binder m) | |
6fa8995c GH |
1444 | ((module-binder m) m v #f))))) |
1445 | ;)) | |
0f2d19dd JB |
1446 | |
1447 | ;; module-variable module symbol | |
20edfbbd TTN |
1448 | ;; |
1449 | ;; like module-local-variable, except search the uses in the | |
0f2d19dd JB |
1450 | ;; case V is not found in M. |
1451 | ;; | |
6906bd0d MD |
1452 | ;; NOTE: This function is superseded with C code (see modules.c) |
1453 | ;;; when using the standard eval closure. | |
1454 | ;; | |
0f2d19dd JB |
1455 | (define (module-variable m v) |
1456 | (module-search module-local-variable m v)) | |
1457 | ||
1458 | ||
1459 | ;;; {Mapping modules x symbols --> bindings} | |
1460 | ;;; | |
1461 | ;;; These are similar to the mapping to variables, except that the | |
1462 | ;;; variable is dereferenced. | |
1463 | ;;; | |
1464 | ||
1465 | ;; module-symbol-binding module symbol opt-value | |
20edfbbd | 1466 | ;; |
0f2d19dd JB |
1467 | ;; return the binding of a variable specified by name within |
1468 | ;; a given module, signalling an error if the variable is unbound. | |
1469 | ;; If the OPT-VALUE is passed, then instead of signalling an error, | |
1470 | ;; return OPT-VALUE. | |
1471 | ;; | |
1472 | (define (module-symbol-local-binding m v . opt-val) | |
1473 | (let ((var (module-local-variable m v))) | |
7b07e5ef | 1474 | (if (and var (variable-bound? var)) |
0f2d19dd JB |
1475 | (variable-ref var) |
1476 | (if (not (null? opt-val)) | |
1477 | (car opt-val) | |
1478 | (error "Locally unbound variable." v))))) | |
1479 | ||
1480 | ;; module-symbol-binding module symbol opt-value | |
20edfbbd | 1481 | ;; |
0f2d19dd JB |
1482 | ;; return the binding of a variable specified by name within |
1483 | ;; a given module, signalling an error if the variable is unbound. | |
1484 | ;; If the OPT-VALUE is passed, then instead of signalling an error, | |
1485 | ;; return OPT-VALUE. | |
1486 | ;; | |
1487 | (define (module-symbol-binding m v . opt-val) | |
1488 | (let ((var (module-variable m v))) | |
7b07e5ef | 1489 | (if (and var (variable-bound? var)) |
0f2d19dd JB |
1490 | (variable-ref var) |
1491 | (if (not (null? opt-val)) | |
1492 | (car opt-val) | |
1493 | (error "Unbound variable." v))))) | |
1494 | ||
1495 | ||
1496 | \f | |
3d2ada2f | 1497 | |
0f2d19dd JB |
1498 | ;;; {Adding Variables to Modules} |
1499 | ;;; | |
0f2d19dd JB |
1500 | |
1501 | ;; module-make-local-var! module symbol | |
20edfbbd | 1502 | ;; |
0f2d19dd JB |
1503 | ;; ensure a variable for V in the local namespace of M. |
1504 | ;; If no variable was already there, then create a new and uninitialzied | |
1505 | ;; variable. | |
1506 | ;; | |
d57da08b MD |
1507 | ;; This function is used in modules.c. |
1508 | ;; | |
0f2d19dd JB |
1509 | (define (module-make-local-var! m v) |
1510 | (or (let ((b (module-obarray-ref (module-obarray m) v))) | |
1777c18b MD |
1511 | (and (variable? b) |
1512 | (begin | |
d57da08b MD |
1513 | ;; Mark as modified since this function is called when |
1514 | ;; the standard eval closure defines a binding | |
1a961d7e | 1515 | (module-modified m) |
1777c18b | 1516 | b))) |
0c5f718b MV |
1517 | |
1518 | ;; No local variable yet, so we need to create a new one. That | |
1519 | ;; new variable is initialized with the old imported value of V, | |
1520 | ;; if there is one. | |
1521 | (let ((imported-var (module-variable m v)) | |
1522 | (local-var (or (and (module-binder m) | |
1523 | ((module-binder m) m v #t)) | |
1524 | (begin | |
1525 | (let ((answer (make-undefined-variable))) | |
1526 | (module-add! m v answer) | |
1527 | answer))))) | |
1528 | (if (and imported-var (not (variable-bound? local-var))) | |
1529 | (variable-set! local-var (variable-ref imported-var))) | |
1530 | local-var))) | |
0f2d19dd | 1531 | |
89d06712 | 1532 | ;; module-ensure-local-variable! module symbol |
9540368e | 1533 | ;; |
89d06712 MV |
1534 | ;; Ensure that there is a local variable in MODULE for SYMBOL. If |
1535 | ;; there is no binding for SYMBOL, create a new uninitialized | |
1536 | ;; variable. Return the local variable. | |
9540368e | 1537 | ;; |
89d06712 MV |
1538 | (define (module-ensure-local-variable! module symbol) |
1539 | (or (module-local-variable module symbol) | |
9540368e | 1540 | (let ((var (make-undefined-variable))) |
9540368e MV |
1541 | (module-add! module symbol var) |
1542 | var))) | |
1543 | ||
0f2d19dd | 1544 | ;; module-add! module symbol var |
20edfbbd | 1545 | ;; |
0f2d19dd JB |
1546 | ;; ensure a particular variable for V in the local namespace of M. |
1547 | ;; | |
1548 | (define (module-add! m v var) | |
1549 | (if (not (variable? var)) | |
1550 | (error "Bad variable to module-add!" var)) | |
1777c18b | 1551 | (module-obarray-set! (module-obarray m) v var) |
1a961d7e | 1552 | (module-modified m)) |
0f2d19dd | 1553 | |
20edfbbd TTN |
1554 | ;; module-remove! |
1555 | ;; | |
0f2d19dd JB |
1556 | ;; make sure that a symbol is undefined in the local namespace of M. |
1557 | ;; | |
1558 | (define (module-remove! m v) | |
c35738c1 | 1559 | (module-obarray-remove! (module-obarray m) v) |
1a961d7e | 1560 | (module-modified m)) |
0f2d19dd JB |
1561 | |
1562 | (define (module-clear! m) | |
c35738c1 | 1563 | (hash-clear! (module-obarray m)) |
1a961d7e | 1564 | (module-modified m)) |
0f2d19dd JB |
1565 | |
1566 | ;; MODULE-FOR-EACH -- exported | |
20edfbbd | 1567 | ;; |
0f2d19dd JB |
1568 | ;; Call PROC on each symbol in MODULE, with arguments of (SYMBOL VARIABLE). |
1569 | ;; | |
1570 | (define (module-for-each proc module) | |
c35738c1 | 1571 | (hash-for-each proc (module-obarray module))) |
0f2d19dd JB |
1572 | |
1573 | (define (module-map proc module) | |
711a9fd7 | 1574 | (hash-map->list proc (module-obarray module))) |
c35738c1 | 1575 | |
0f2d19dd JB |
1576 | \f |
1577 | ||
1578 | ;;; {Low Level Bootstrapping} | |
1579 | ;;; | |
1580 | ||
20edfbbd | 1581 | ;; make-root-module |
0f2d19dd | 1582 | |
296ff5e7 MV |
1583 | ;; A root module uses the pre-modules-obarray as its obarray. This |
1584 | ;; special obarray accumulates all bindings that have been established | |
1585 | ;; before the module system is fully booted. | |
0f2d19dd | 1586 | ;; |
296ff5e7 MV |
1587 | ;; (The obarray continues to be used by code that has been closed over |
1588 | ;; before the module system has been booted.) | |
0f2d19dd JB |
1589 | |
1590 | (define (make-root-module) | |
296ff5e7 MV |
1591 | (let ((m (make-module 0))) |
1592 | (set-module-obarray! m (%get-pre-modules-obarray)) | |
1593 | m)) | |
0f2d19dd | 1594 | |
b622dec7 | 1595 | ;; make-scm-module |
0f2d19dd | 1596 | |
296ff5e7 MV |
1597 | ;; The root interface is a module that uses the same obarray as the |
1598 | ;; root module. It does not allow new definitions, tho. | |
0f2d19dd | 1599 | |
6906bd0d | 1600 | (define (make-scm-module) |
296ff5e7 MV |
1601 | (let ((m (make-module 0))) |
1602 | (set-module-obarray! m (%get-pre-modules-obarray)) | |
1603 | (set-module-eval-closure! m (standard-interface-eval-closure m)) | |
1604 | m)) | |
0f2d19dd JB |
1605 | |
1606 | ||
0f2d19dd | 1607 | \f |
3d2ada2f | 1608 | |
0f2d19dd JB |
1609 | ;;; {Module-based Loading} |
1610 | ;;; | |
1611 | ||
1612 | (define (save-module-excursion thunk) | |
1613 | (let ((inner-module (current-module)) | |
1614 | (outer-module #f)) | |
1615 | (dynamic-wind (lambda () | |
1616 | (set! outer-module (current-module)) | |
1617 | (set-current-module inner-module) | |
1618 | (set! inner-module #f)) | |
1619 | thunk | |
1620 | (lambda () | |
1621 | (set! inner-module (current-module)) | |
1622 | (set-current-module outer-module) | |
1623 | (set! outer-module #f))))) | |
1624 | ||
0f2d19dd JB |
1625 | (define basic-load load) |
1626 | ||
ec3a8ace | 1627 | (define (load-module filename . reader) |
c6775c40 MD |
1628 | (save-module-excursion |
1629 | (lambda () | |
1630 | (let ((oldname (and (current-load-port) | |
1631 | (port-filename (current-load-port))))) | |
ec3a8ace NJ |
1632 | (apply basic-load |
1633 | (if (and oldname | |
1634 | (> (string-length filename) 0) | |
1635 | (not (char=? (string-ref filename 0) #\/)) | |
1636 | (not (string=? (dirname oldname) "."))) | |
1637 | (string-append (dirname oldname) "/" filename) | |
1638 | filename) | |
1639 | reader))))) | |
0f2d19dd JB |
1640 | |
1641 | ||
1642 | \f | |
3d2ada2f | 1643 | |
44cf1f0f | 1644 | ;;; {MODULE-REF -- exported} |
3d2ada2f DH |
1645 | ;;; |
1646 | ||
0f2d19dd JB |
1647 | ;; Returns the value of a variable called NAME in MODULE or any of its |
1648 | ;; used modules. If there is no such variable, then if the optional third | |
1649 | ;; argument DEFAULT is present, it is returned; otherwise an error is signaled. | |
20edfbbd | 1650 | ;; |
0f2d19dd JB |
1651 | (define (module-ref module name . rest) |
1652 | (let ((variable (module-variable module name))) | |
1653 | (if (and variable (variable-bound? variable)) | |
1654 | (variable-ref variable) | |
1655 | (if (null? rest) | |
1656 | (error "No variable named" name 'in module) | |
1657 | (car rest) ; default value | |
1658 | )))) | |
1659 | ||
1660 | ;; MODULE-SET! -- exported | |
1661 | ;; | |
1662 | ;; Sets the variable called NAME in MODULE (or in a module that MODULE uses) | |
1663 | ;; to VALUE; if there is no such variable, an error is signaled. | |
20edfbbd | 1664 | ;; |
0f2d19dd JB |
1665 | (define (module-set! module name value) |
1666 | (let ((variable (module-variable module name))) | |
1667 | (if variable | |
1668 | (variable-set! variable value) | |
1669 | (error "No variable named" name 'in module)))) | |
1670 | ||
1671 | ;; MODULE-DEFINE! -- exported | |
1672 | ;; | |
1673 | ;; Sets the variable called NAME in MODULE to VALUE; if there is no such | |
1674 | ;; variable, it is added first. | |
20edfbbd | 1675 | ;; |
0f2d19dd JB |
1676 | (define (module-define! module name value) |
1677 | (let ((variable (module-local-variable module name))) | |
1678 | (if variable | |
1777c18b MD |
1679 | (begin |
1680 | (variable-set! variable value) | |
1a961d7e | 1681 | (module-modified module)) |
296ff5e7 | 1682 | (let ((variable (make-variable value))) |
296ff5e7 | 1683 | (module-add! module name variable))))) |
0f2d19dd | 1684 | |
ed218d98 MV |
1685 | ;; MODULE-DEFINED? -- exported |
1686 | ;; | |
1687 | ;; Return #t iff NAME is defined in MODULE (or in a module that MODULE | |
1688 | ;; uses) | |
1689 | ;; | |
1690 | (define (module-defined? module name) | |
1691 | (let ((variable (module-variable module name))) | |
1692 | (and variable (variable-bound? variable)))) | |
1693 | ||
0f2d19dd JB |
1694 | ;; MODULE-USE! module interface |
1695 | ;; | |
1696 | ;; Add INTERFACE to the list of interfaces used by MODULE. | |
20edfbbd | 1697 | ;; |
0f2d19dd JB |
1698 | (define (module-use! module interface) |
1699 | (set-module-uses! module | |
c614a00b MD |
1700 | (cons interface |
1701 | (filter (lambda (m) | |
1702 | (not (equal? (module-name m) | |
1703 | (module-name interface)))) | |
1704 | (module-uses module)))) | |
1a961d7e | 1705 | (module-modified module)) |
0f2d19dd | 1706 | |
7b07e5ef MD |
1707 | ;; MODULE-USE-INTERFACES! module interfaces |
1708 | ;; | |
1709 | ;; Same as MODULE-USE! but add multiple interfaces and check for duplicates | |
1710 | ;; | |
1711 | (define (module-use-interfaces! module interfaces) | |
8d8dac1f | 1712 | (let* ((duplicates-handlers? (or (module-duplicates-handlers module) |
70a459e3 | 1713 | (default-duplicate-binding-procedures))) |
7b07e5ef MD |
1714 | (uses (module-uses module))) |
1715 | ;; remove duplicates-interface | |
8d8dac1f | 1716 | (set! uses (delq! (module-duplicates-interface module) uses)) |
7b07e5ef MD |
1717 | ;; remove interfaces to be added |
1718 | (for-each (lambda (interface) | |
c614a00b MD |
1719 | (set! uses |
1720 | (filter (lambda (m) | |
1721 | (not (equal? (module-name m) | |
1722 | (module-name interface)))) | |
1723 | uses))) | |
7b07e5ef MD |
1724 | interfaces) |
1725 | ;; add interfaces to use list | |
1726 | (set-module-uses! module uses) | |
1727 | (for-each (lambda (interface) | |
1728 | (and duplicates-handlers? | |
1729 | ;; perform duplicate checking | |
1730 | (process-duplicates module interface)) | |
1731 | (set! uses (cons interface uses)) | |
1732 | (set-module-uses! module uses)) | |
1733 | interfaces) | |
1734 | ;; add duplicates interface | |
8d8dac1f MD |
1735 | (if (module-duplicates-interface module) |
1736 | (set-module-uses! module | |
1737 | (cons (module-duplicates-interface module) uses))) | |
7b07e5ef MD |
1738 | (module-modified module))) |
1739 | ||
0f2d19dd | 1740 | \f |
3d2ada2f | 1741 | |
0f2d19dd JB |
1742 | ;;; {Recursive Namespaces} |
1743 | ;;; | |
0f2d19dd JB |
1744 | ;;; A hierarchical namespace emerges if we consider some module to be |
1745 | ;;; root, and variables bound to modules as nested namespaces. | |
1746 | ;;; | |
1747 | ;;; The routines in this file manage variable names in hierarchical namespace. | |
1748 | ;;; Each variable name is a list of elements, looked up in successively nested | |
1749 | ;;; modules. | |
1750 | ;;; | |
0dd5491c | 1751 | ;;; (nested-ref some-root-module '(foo bar baz)) |
20edfbbd | 1752 | ;;; => <value of a variable named baz in the module bound to bar in |
0f2d19dd JB |
1753 | ;;; the module bound to foo in some-root-module> |
1754 | ;;; | |
1755 | ;;; | |
1756 | ;;; There are: | |
1757 | ;;; | |
1758 | ;;; ;; a-root is a module | |
1759 | ;;; ;; name is a list of symbols | |
1760 | ;;; | |
0dd5491c MD |
1761 | ;;; nested-ref a-root name |
1762 | ;;; nested-set! a-root name val | |
1763 | ;;; nested-define! a-root name val | |
1764 | ;;; nested-remove! a-root name | |
0f2d19dd JB |
1765 | ;;; |
1766 | ;;; | |
1767 | ;;; (current-module) is a natural choice for a-root so for convenience there are | |
1768 | ;;; also: | |
1769 | ;;; | |
0dd5491c MD |
1770 | ;;; local-ref name == nested-ref (current-module) name |
1771 | ;;; local-set! name val == nested-set! (current-module) name val | |
1772 | ;;; local-define! name val == nested-define! (current-module) name val | |
1773 | ;;; local-remove! name == nested-remove! (current-module) name | |
0f2d19dd JB |
1774 | ;;; |
1775 | ||
1776 | ||
0dd5491c | 1777 | (define (nested-ref root names) |
0f2d19dd JB |
1778 | (let loop ((cur root) |
1779 | (elts names)) | |
1780 | (cond | |
1781 | ((null? elts) cur) | |
1782 | ((not (module? cur)) #f) | |
1783 | (else (loop (module-ref cur (car elts) #f) (cdr elts)))))) | |
1784 | ||
0dd5491c | 1785 | (define (nested-set! root names val) |
0f2d19dd JB |
1786 | (let loop ((cur root) |
1787 | (elts names)) | |
1788 | (if (null? (cdr elts)) | |
1789 | (module-set! cur (car elts) val) | |
1790 | (loop (module-ref cur (car elts)) (cdr elts))))) | |
1791 | ||
0dd5491c | 1792 | (define (nested-define! root names val) |
0f2d19dd JB |
1793 | (let loop ((cur root) |
1794 | (elts names)) | |
1795 | (if (null? (cdr elts)) | |
1796 | (module-define! cur (car elts) val) | |
1797 | (loop (module-ref cur (car elts)) (cdr elts))))) | |
1798 | ||
0dd5491c | 1799 | (define (nested-remove! root names) |
0f2d19dd JB |
1800 | (let loop ((cur root) |
1801 | (elts names)) | |
1802 | (if (null? (cdr elts)) | |
1803 | (module-remove! cur (car elts)) | |
1804 | (loop (module-ref cur (car elts)) (cdr elts))))) | |
1805 | ||
0dd5491c MD |
1806 | (define (local-ref names) (nested-ref (current-module) names)) |
1807 | (define (local-set! names val) (nested-set! (current-module) names val)) | |
1808 | (define (local-define names val) (nested-define! (current-module) names val)) | |
1809 | (define (local-remove names) (nested-remove! (current-module) names)) | |
0f2d19dd JB |
1810 | |
1811 | ||
1812 | \f | |
3d2ada2f | 1813 | |
ac5d303b | 1814 | ;;; {The (%app) module} |
0f2d19dd JB |
1815 | ;;; |
1816 | ;;; The root of conventionally named objects not directly in the top level. | |
1817 | ;;; | |
ac5d303b MV |
1818 | ;;; (%app modules) |
1819 | ;;; (%app modules guile) | |
0f2d19dd JB |
1820 | ;;; |
1821 | ;;; The directory of all modules and the standard root module. | |
1822 | ;;; | |
1823 | ||
edc185c7 MD |
1824 | (define (module-public-interface m) |
1825 | (module-ref m '%module-public-interface #f)) | |
1826 | (define (set-module-public-interface! m i) | |
1827 | (module-define! m '%module-public-interface i)) | |
1828 | (define (set-system-module! m s) | |
1829 | (set-procedure-property! (module-eval-closure m) 'system-module s)) | |
0f2d19dd JB |
1830 | (define the-root-module (make-root-module)) |
1831 | (define the-scm-module (make-scm-module)) | |
1832 | (set-module-public-interface! the-root-module the-scm-module) | |
d5504515 MD |
1833 | (set-module-name! the-root-module '(guile)) |
1834 | (set-module-name! the-scm-module '(guile)) | |
1835 | (set-module-kind! the-scm-module 'interface) | |
edc185c7 | 1836 | (for-each set-system-module! (list the-root-module the-scm-module) '(#t #t)) |
0f2d19dd | 1837 | |
296ff5e7 MV |
1838 | ;; NOTE: This binding is used in libguile/modules.c. |
1839 | ;; | |
1840 | (define (make-modules-in module name) | |
1841 | (if (null? name) | |
1842 | module | |
1843 | (cond | |
1844 | ((module-ref module (car name) #f) | |
1845 | => (lambda (m) (make-modules-in m (cdr name)))) | |
1846 | (else (let ((m (make-module 31))) | |
1847 | (set-module-kind! m 'directory) | |
1848 | (set-module-name! m (append (or (module-name module) | |
1849 | '()) | |
1850 | (list (car name)))) | |
1851 | (module-define! module (car name) m) | |
1852 | (make-modules-in m (cdr name))))))) | |
0f2d19dd | 1853 | |
296ff5e7 MV |
1854 | (define (beautify-user-module! module) |
1855 | (let ((interface (module-public-interface module))) | |
1856 | (if (or (not interface) | |
1857 | (eq? interface module)) | |
1858 | (let ((interface (make-module 31))) | |
1859 | (set-module-name! interface (module-name module)) | |
1860 | (set-module-kind! interface 'interface) | |
8d8dac1f | 1861 | (set-module-public-interface! module interface)))) |
296ff5e7 MV |
1862 | (if (and (not (memq the-scm-module (module-uses module))) |
1863 | (not (eq? module the-root-module))) | |
7b07e5ef MD |
1864 | (set-module-uses! module |
1865 | (append (module-uses module) (list the-scm-module))))) | |
432558b9 | 1866 | |
1f60d9d2 MD |
1867 | ;; NOTE: This binding is used in libguile/modules.c. |
1868 | ;; | |
0209ca9a | 1869 | (define (resolve-module name . maybe-autoload) |
ac5d303b | 1870 | (let ((full-name (append '(%app modules) name))) |
9f84d6aa | 1871 | (let ((already (nested-ref the-root-module full-name))) |
432558b9 MD |
1872 | (if already |
1873 | ;; The module already exists... | |
1874 | (if (and (or (null? maybe-autoload) (car maybe-autoload)) | |
fb1b76f4 | 1875 | (not (module-public-interface already))) |
432558b9 MD |
1876 | ;; ...but we are told to load and it doesn't contain source, so |
1877 | (begin | |
1878 | (try-load-module name) | |
1879 | already) | |
1880 | ;; simply return it. | |
1881 | already) | |
3e3cec45 | 1882 | (begin |
432558b9 | 1883 | ;; Try to autoload it if we are told so |
3e3cec45 | 1884 | (if (or (null? maybe-autoload) (car maybe-autoload)) |
432558b9 MD |
1885 | (try-load-module name)) |
1886 | ;; Get/create it. | |
3e3cec45 | 1887 | (make-modules-in (current-module) full-name)))))) |
20edfbbd | 1888 | |
d866f445 MV |
1889 | ;; Cheat. These bindings are needed by modules.c, but we don't want |
1890 | ;; to move their real definition here because that would be unnatural. | |
1891 | ;; | |
296ff5e7 | 1892 | (define try-module-autoload #f) |
d866f445 MV |
1893 | (define process-define-module #f) |
1894 | (define process-use-modules #f) | |
1895 | (define module-export! #f) | |
296ff5e7 MV |
1896 | |
1897 | ;; This boots the module system. All bindings needed by modules.c | |
1898 | ;; must have been defined by now. | |
1899 | ;; | |
1900 | (set-current-module the-root-module) | |
1901 | ||
ac5d303b MV |
1902 | (define %app (make-module 31)) |
1903 | (define app %app) ;; for backwards compatability | |
1904 | (local-define '(%app modules) (make-module 31)) | |
1905 | (local-define '(%app modules guile) the-root-module) | |
296ff5e7 | 1906 | |
ac5d303b | 1907 | ;; (define-special-value '(%app modules new-ws) (lambda () (make-scm-module))) |
296ff5e7 MV |
1908 | |
1909 | (define (try-load-module name) | |
48fdec21 MV |
1910 | (or (begin-deprecated (try-module-linked name)) |
1911 | (try-module-autoload name) | |
1912 | (begin-deprecated (try-module-dynamic-link name)))) | |
0f2d19dd | 1913 | |
90847923 MD |
1914 | (define (purify-module! module) |
1915 | "Removes bindings in MODULE which are inherited from the (guile) module." | |
1916 | (let ((use-list (module-uses module))) | |
1917 | (if (and (pair? use-list) | |
1918 | (eq? (car (last-pair use-list)) the-scm-module)) | |
1919 | (set-module-uses! module (reverse (cdr (reverse use-list))))))) | |
1920 | ||
4eecfeb7 | 1921 | ;; Return a module that is an interface to the module designated by |
532cf805 MV |
1922 | ;; NAME. |
1923 | ;; | |
c614a00b | 1924 | ;; `resolve-interface' takes four keyword arguments: |
532cf805 MV |
1925 | ;; |
1926 | ;; #:select SELECTION | |
1927 | ;; | |
1928 | ;; SELECTION is a list of binding-specs to be imported; A binding-spec | |
1929 | ;; is either a symbol or a pair of symbols (ORIG . SEEN), where ORIG | |
1930 | ;; is the name in the used module and SEEN is the name in the using | |
1931 | ;; module. Note that SEEN is also passed through RENAMER, below. The | |
1932 | ;; default is to select all bindings. If you specify no selection but | |
4eecfeb7 | 1933 | ;; a renamer, only the bindings that already exist in the used module |
532cf805 MV |
1934 | ;; are made available in the interface. Bindings that are added later |
1935 | ;; are not picked up. | |
1936 | ;; | |
c614a00b | 1937 | ;; #:hide BINDINGS |
532cf805 | 1938 | ;; |
c614a00b | 1939 | ;; BINDINGS is a list of bindings which should not be imported. |
f595ccfe MD |
1940 | ;; |
1941 | ;; #:prefix PREFIX | |
1942 | ;; | |
1943 | ;; PREFIX is a symbol that will be appended to each exported name. | |
1944 | ;; The default is to not perform any renaming. | |
532cf805 | 1945 | ;; |
c614a00b MD |
1946 | ;; #:renamer RENAMER |
1947 | ;; | |
1948 | ;; RENAMER is a procedure that takes a symbol and returns its new | |
1949 | ;; name. The default is not perform any renaming. | |
1950 | ;; | |
532cf805 MV |
1951 | ;; Signal "no code for module" error if module name is not resolvable |
1952 | ;; or its public interface is not available. Signal "no binding" | |
1953 | ;; error if selected binding does not exist in the used module. | |
1954 | ;; | |
1955 | (define (resolve-interface name . args) | |
1956 | ||
1957 | (define (get-keyword-arg args kw def) | |
1958 | (cond ((memq kw args) | |
1959 | => (lambda (kw-arg) | |
1960 | (if (null? (cdr kw-arg)) | |
1961 | (error "keyword without value: " kw)) | |
1962 | (cadr kw-arg))) | |
1963 | (else | |
1964 | def))) | |
1965 | ||
1966 | (let* ((select (get-keyword-arg args #:select #f)) | |
c614a00b | 1967 | (hide (get-keyword-arg args #:hide '())) |
f595ccfe MD |
1968 | (renamer (or (get-keyword-arg args #:renamer #f) |
1969 | (let ((prefix (get-keyword-arg args #:prefix #f))) | |
1970 | (and prefix (symbol-prefix-proc prefix))) | |
1971 | identity)) | |
b622dec7 TTN |
1972 | (module (resolve-module name)) |
1973 | (public-i (and module (module-public-interface module)))) | |
1974 | (and (or (not module) (not public-i)) | |
1975 | (error "no code for module" name)) | |
c614a00b | 1976 | (if (and (not select) (null? hide) (eq? renamer identity)) |
b622dec7 | 1977 | public-i |
532cf805 MV |
1978 | (let ((selection (or select (module-map (lambda (sym var) sym) |
1979 | public-i))) | |
b622dec7 | 1980 | (custom-i (make-module 31))) |
c614a00b MD |
1981 | (set-module-kind! custom-i 'custom-interface) |
1982 | (set-module-name! custom-i name) | |
532cf805 MV |
1983 | ;; XXX - should use a lazy binder so that changes to the |
1984 | ;; used module are picked up automatically. | |
d57da08b MD |
1985 | (for-each (lambda (bspec) |
1986 | (let* ((direct? (symbol? bspec)) | |
1987 | (orig (if direct? bspec (car bspec))) | |
1988 | (seen (if direct? bspec (cdr bspec))) | |
c614a00b MD |
1989 | (var (or (module-local-variable public-i orig) |
1990 | (module-local-variable module orig) | |
1991 | (error | |
1992 | ;; fixme: format manually for now | |
1993 | (simple-format | |
1994 | #f "no binding `~A' in module ~A" | |
1995 | orig name))))) | |
1996 | (if (memq orig hide) | |
1997 | (set! hide (delq! orig hide)) | |
1998 | (module-add! custom-i | |
1999 | (renamer seen) | |
2000 | var)))) | |
d57da08b | 2001 | selection) |
c614a00b MD |
2002 | ;; Check that we are not hiding bindings which don't exist |
2003 | (for-each (lambda (binding) | |
2004 | (if (not (module-local-variable public-i binding)) | |
2005 | (error | |
2006 | (simple-format | |
2007 | #f "no binding `~A' to hide in module ~A" | |
2008 | binding name)))) | |
2009 | hide) | |
b622dec7 | 2010 | custom-i)))) |
fb1b76f4 TTN |
2011 | |
2012 | (define (symbol-prefix-proc prefix) | |
2013 | (lambda (symbol) | |
2014 | (symbol-append prefix symbol))) | |
0f2d19dd | 2015 | |
482a28f9 MV |
2016 | ;; This function is called from "modules.c". If you change it, be |
2017 | ;; sure to update "modules.c" as well. | |
2018 | ||
0f2d19dd | 2019 | (define (process-define-module args) |
f8a502cb TTN |
2020 | (let* ((module-id (car args)) |
2021 | (module (resolve-module module-id #f)) | |
2022 | (kws (cdr args)) | |
2023 | (unrecognized (lambda (arg) | |
2024 | (error "unrecognized define-module argument" arg)))) | |
0f2d19dd | 2025 | (beautify-user-module! module) |
0209ca9a | 2026 | (let loop ((kws kws) |
44484f52 | 2027 | (reversed-interfaces '()) |
5d20b8c7 | 2028 | (exports '()) |
f595ccfe MD |
2029 | (re-exports '()) |
2030 | (replacements '())) | |
e4da0740 | 2031 | |
0209ca9a | 2032 | (if (null? kws) |
d57da08b MD |
2033 | (call-with-deferred-observers |
2034 | (lambda () | |
2035 | (module-use-interfaces! module (reverse reversed-interfaces)) | |
2036 | (module-export! module exports) | |
2037 | (module-replace! module replacements) | |
2038 | (module-re-export! module re-exports))) | |
532cf805 MV |
2039 | (case (car kws) |
2040 | ((#:use-module #:use-syntax) | |
2041 | (or (pair? (cdr kws)) | |
2042 | (unrecognized kws)) | |
2043 | (let* ((interface-args (cadr kws)) | |
2044 | (interface (apply resolve-interface interface-args))) | |
88c4ba2a KN |
2045 | (and (eq? (car kws) #:use-syntax) |
2046 | (or (symbol? (caar interface-args)) | |
532cf805 | 2047 | (error "invalid module name for use-syntax" |
88c4ba2a | 2048 | (car interface-args))) |
532cf805 MV |
2049 | (set-module-transformer! |
2050 | module | |
88c4ba2a KN |
2051 | (module-ref interface |
2052 | (car (last-pair (car interface-args))) | |
532cf805 | 2053 | #f))) |
44484f52 | 2054 | (loop (cddr kws) |
532cf805 | 2055 | (cons interface reversed-interfaces) |
5d20b8c7 | 2056 | exports |
f595ccfe MD |
2057 | re-exports |
2058 | replacements))) | |
532cf805 MV |
2059 | ((#:autoload) |
2060 | (or (and (pair? (cdr kws)) (pair? (cddr kws))) | |
2061 | (unrecognized kws)) | |
2062 | (loop (cdddr kws) | |
2063 | (cons (make-autoload-interface module | |
2064 | (cadr kws) | |
2065 | (caddr kws)) | |
2066 | reversed-interfaces) | |
5d20b8c7 | 2067 | exports |
f595ccfe MD |
2068 | re-exports |
2069 | replacements)) | |
532cf805 MV |
2070 | ((#:no-backtrace) |
2071 | (set-system-module! module #t) | |
f595ccfe | 2072 | (loop (cdr kws) reversed-interfaces exports re-exports replacements)) |
532cf805 MV |
2073 | ((#:pure) |
2074 | (purify-module! module) | |
f595ccfe | 2075 | (loop (cdr kws) reversed-interfaces exports re-exports replacements)) |
7b07e5ef MD |
2076 | ((#:duplicates) |
2077 | (if (not (pair? (cdr kws))) | |
2078 | (unrecognized kws)) | |
8d8dac1f MD |
2079 | (set-module-duplicates-handlers! |
2080 | module | |
2081 | (lookup-duplicates-handlers (cadr kws))) | |
f595ccfe | 2082 | (loop (cddr kws) reversed-interfaces exports re-exports replacements)) |
39819fa9 | 2083 | ((#:export #:export-syntax) |
532cf805 MV |
2084 | (or (pair? (cdr kws)) |
2085 | (unrecognized kws)) | |
2086 | (loop (cddr kws) | |
2087 | reversed-interfaces | |
5d20b8c7 | 2088 | (append (cadr kws) exports) |
f595ccfe MD |
2089 | re-exports |
2090 | replacements)) | |
39819fa9 | 2091 | ((#:re-export #:re-export-syntax) |
5d20b8c7 MD |
2092 | (or (pair? (cdr kws)) |
2093 | (unrecognized kws)) | |
2094 | (loop (cddr kws) | |
2095 | reversed-interfaces | |
2096 | exports | |
f595ccfe MD |
2097 | (append (cadr kws) re-exports) |
2098 | replacements)) | |
2099 | ((#:replace #:replace-syntax) | |
2100 | (or (pair? (cdr kws)) | |
2101 | (unrecognized kws)) | |
2102 | (loop (cddr kws) | |
2103 | reversed-interfaces | |
2104 | exports | |
2105 | re-exports | |
2106 | (append (cadr kws) replacements))) | |
532cf805 MV |
2107 | (else |
2108 | (unrecognized kws))))) | |
db853761 | 2109 | (run-hook module-defined-hook module) |
0f2d19dd | 2110 | module)) |
71225060 | 2111 | |
db853761 NJ |
2112 | ;; `module-defined-hook' is a hook that is run whenever a new module |
2113 | ;; is defined. Its members are called with one argument, the new | |
2114 | ;; module. | |
2115 | (define module-defined-hook (make-hook 1)) | |
2116 | ||
3d2ada2f DH |
2117 | \f |
2118 | ||
71225060 | 2119 | ;;; {Autoload} |
3d2ada2f | 2120 | ;;; |
71225060 MD |
2121 | |
2122 | (define (make-autoload-interface module name bindings) | |
2123 | (let ((b (lambda (a sym definep) | |
2124 | (and (memq sym bindings) | |
2125 | (let ((i (module-public-interface (resolve-module name)))) | |
2126 | (if (not i) | |
2127 | (error "missing interface for module" name)) | |
cd5fea8d KR |
2128 | (let ((autoload (memq a (module-uses module)))) |
2129 | ;; Replace autoload-interface with actual interface if | |
2130 | ;; that has not happened yet. | |
2131 | (if (pair? autoload) | |
2132 | (set-car! autoload i))) | |
71225060 | 2133 | (module-local-variable i sym)))))) |
eb84efa1 | 2134 | (module-constructor (make-hash-table 0) '() b #f #f name 'autoload #f #f |
6b64c19b | 2135 | '() (make-weak-value-hash-table 31) 0))) |
71225060 | 2136 | |
ff5546f5 KN |
2137 | ;;; {Compiled module} |
2138 | ||
2139 | (define load-compiled #f) | |
2140 | ||
0f2d19dd | 2141 | \f |
3d2ada2f | 2142 | |
44cf1f0f | 2143 | ;;; {Autoloading modules} |
3d2ada2f | 2144 | ;;; |
0f2d19dd JB |
2145 | |
2146 | (define autoloads-in-progress '()) | |
2147 | ||
482a28f9 MV |
2148 | ;; This function is called from "modules.c". If you change it, be |
2149 | ;; sure to update "modules.c" as well. | |
2150 | ||
0f2d19dd | 2151 | (define (try-module-autoload module-name) |
0f2d19dd | 2152 | (let* ((reverse-name (reverse module-name)) |
06f0414c | 2153 | (name (symbol->string (car reverse-name))) |
0f2d19dd | 2154 | (dir-hint-module-name (reverse (cdr reverse-name))) |
06f0414c MD |
2155 | (dir-hint (apply string-append |
2156 | (map (lambda (elt) | |
2157 | (string-append (symbol->string elt) "/")) | |
2158 | dir-hint-module-name)))) | |
0209ca9a | 2159 | (resolve-module dir-hint-module-name #f) |
0f2d19dd JB |
2160 | (and (not (autoload-done-or-in-progress? dir-hint name)) |
2161 | (let ((didit #f)) | |
ff5546f5 KN |
2162 | (define (load-file proc file) |
2163 | (save-module-excursion (lambda () (proc file))) | |
2164 | (set! didit #t)) | |
0f2d19dd JB |
2165 | (dynamic-wind |
2166 | (lambda () (autoload-in-progress! dir-hint name)) | |
defed517 | 2167 | (lambda () |
ff5546f5 KN |
2168 | (let ((file (in-vicinity dir-hint name))) |
2169 | (cond ((and load-compiled | |
2170 | (%search-load-path (string-append file ".go"))) | |
2171 | => (lambda (full) | |
2172 | (load-file load-compiled full))) | |
2173 | ((%search-load-path file) | |
2174 | => (lambda (full) | |
2328328f NJ |
2175 | (with-fluids ((current-reader #f)) |
2176 | (load-file primitive-load full))))))) | |
0f2d19dd JB |
2177 | (lambda () (set-autoloaded! dir-hint name didit))) |
2178 | didit)))) | |
2179 | ||
71225060 | 2180 | \f |
3d2ada2f DH |
2181 | |
2182 | ;;; {Dynamic linking of modules} | |
2183 | ;;; | |
d0cbd20c | 2184 | |
0f2d19dd JB |
2185 | (define autoloads-done '((guile . guile))) |
2186 | ||
2187 | (define (autoload-done-or-in-progress? p m) | |
2188 | (let ((n (cons p m))) | |
2189 | (->bool (or (member n autoloads-done) | |
2190 | (member n autoloads-in-progress))))) | |
2191 | ||
2192 | (define (autoload-done! p m) | |
2193 | (let ((n (cons p m))) | |
2194 | (set! autoloads-in-progress | |
2195 | (delete! n autoloads-in-progress)) | |
2196 | (or (member n autoloads-done) | |
2197 | (set! autoloads-done (cons n autoloads-done))))) | |
2198 | ||
2199 | (define (autoload-in-progress! p m) | |
2200 | (let ((n (cons p m))) | |
2201 | (set! autoloads-done | |
2202 | (delete! n autoloads-done)) | |
2203 | (set! autoloads-in-progress (cons n autoloads-in-progress)))) | |
2204 | ||
2205 | (define (set-autoloaded! p m done?) | |
2206 | (if done? | |
2207 | (autoload-done! p m) | |
2208 | (let ((n (cons p m))) | |
2209 | (set! autoloads-done (delete! n autoloads-done)) | |
2210 | (set! autoloads-in-progress (delete! n autoloads-in-progress))))) | |
2211 | ||
0f2d19dd JB |
2212 | \f |
2213 | ||
83b38198 | 2214 | ;;; {Run-time options} |
3d2ada2f | 2215 | ;;; |
83b38198 | 2216 | |
e9bab9df DH |
2217 | (define define-option-interface |
2218 | (let* ((option-name car) | |
2219 | (option-value cadr) | |
2220 | (option-documentation caddr) | |
2221 | ||
2222 | (print-option (lambda (option) | |
2223 | (display (option-name option)) | |
2224 | (if (< (string-length | |
2225 | (symbol->string (option-name option))) | |
2226 | 8) | |
2227 | (display #\tab)) | |
2228 | (display #\tab) | |
2229 | (display (option-value option)) | |
2230 | (display #\tab) | |
2231 | (display (option-documentation option)) | |
2232 | (newline))) | |
2233 | ||
2234 | ;; Below follow the macros defining the run-time option interfaces. | |
2235 | ||
2236 | (make-options (lambda (interface) | |
2237 | `(lambda args | |
2238 | (cond ((null? args) (,interface)) | |
2239 | ((list? (car args)) | |
2240 | (,interface (car args)) (,interface)) | |
2241 | (else (for-each ,print-option | |
2242 | (,interface #t))))))) | |
2243 | ||
2244 | (make-enable (lambda (interface) | |
83b38198 | 2245 | `(lambda flags |
e9bab9df DH |
2246 | (,interface (append flags (,interface))) |
2247 | (,interface)))) | |
2248 | ||
2249 | (make-disable (lambda (interface) | |
2250 | `(lambda flags | |
2251 | (let ((options (,interface))) | |
2252 | (for-each (lambda (flag) | |
2253 | (set! options (delq! flag options))) | |
2254 | flags) | |
2255 | (,interface options) | |
0983f67f | 2256 | (,interface)))))) |
7c38399f | 2257 | (procedure->memoizing-macro |
83b38198 | 2258 | (lambda (exp env) |
0983f67f NJ |
2259 | (let* ((option-group (cadr exp)) |
2260 | (interface (car option-group)) | |
2261 | (options/enable/disable (cadr option-group))) | |
2262 | `(begin | |
2263 | (define ,(car options/enable/disable) | |
2264 | ,(make-options interface)) | |
2265 | (define ,(cadr options/enable/disable) | |
2266 | ,(make-enable interface)) | |
2267 | (define ,(caddr options/enable/disable) | |
2268 | ,(make-disable interface)) | |
2269 | (defmacro ,(caaddr option-group) (opt val) | |
2270 | `(,,(car options/enable/disable) | |
3f619266 NJ |
2271 | (append (,,(car options/enable/disable)) |
2272 | (list ',opt ,val)))))))))) | |
e9bab9df DH |
2273 | |
2274 | (define-option-interface | |
2275 | (eval-options-interface | |
2276 | (eval-options eval-enable eval-disable) | |
2277 | (eval-set!))) | |
2278 | ||
2279 | (define-option-interface | |
2280 | (debug-options-interface | |
2281 | (debug-options debug-enable debug-disable) | |
2282 | (debug-set!))) | |
2283 | ||
2284 | (define-option-interface | |
2285 | (evaluator-traps-interface | |
2286 | (traps trap-enable trap-disable) | |
2287 | (trap-set!))) | |
2288 | ||
2289 | (define-option-interface | |
2290 | (read-options-interface | |
2291 | (read-options read-enable read-disable) | |
2292 | (read-set!))) | |
2293 | ||
2294 | (define-option-interface | |
2295 | (print-options-interface | |
2296 | (print-options print-enable print-disable) | |
2297 | (print-set!))) | |
83b38198 MD |
2298 | |
2299 | \f | |
2300 | ||
0f2d19dd JB |
2301 | ;;; {Running Repls} |
2302 | ;;; | |
2303 | ||
2304 | (define (repl read evaler print) | |
75a97b92 | 2305 | (let loop ((source (read (current-input-port)))) |
0f2d19dd | 2306 | (print (evaler source)) |
75a97b92 | 2307 | (loop (read (current-input-port))))) |
0f2d19dd JB |
2308 | |
2309 | ;; A provisional repl that acts like the SCM repl: | |
2310 | ;; | |
2311 | (define scm-repl-silent #f) | |
2312 | (define (assert-repl-silence v) (set! scm-repl-silent v)) | |
2313 | ||
21ed9efe MD |
2314 | (define *unspecified* (if #f #f)) |
2315 | (define (unspecified? v) (eq? v *unspecified*)) | |
2316 | ||
2317 | (define scm-repl-print-unspecified #f) | |
2318 | (define (assert-repl-print-unspecified v) (set! scm-repl-print-unspecified v)) | |
2319 | ||
79451588 | 2320 | (define scm-repl-verbose #f) |
0f2d19dd JB |
2321 | (define (assert-repl-verbosity v) (set! scm-repl-verbose v)) |
2322 | ||
e6875011 | 2323 | (define scm-repl-prompt "guile> ") |
0f2d19dd | 2324 | |
e6875011 MD |
2325 | (define (set-repl-prompt! v) (set! scm-repl-prompt v)) |
2326 | ||
d5d34fa1 MD |
2327 | (define (default-lazy-handler key . args) |
2328 | (save-stack lazy-handler-dispatch) | |
2329 | (apply throw key args)) | |
2330 | ||
d5d34fa1 | 2331 | (define (lazy-handler-dispatch key . args) |
d95c0b76 | 2332 | (apply default-lazy-handler key args)) |
0f2d19dd | 2333 | |
3e3cec45 | 2334 | (define abort-hook (make-hook)) |
59e1116d | 2335 | |
28d8ab3c GH |
2336 | ;; these definitions are used if running a script. |
2337 | ;; otherwise redefined in error-catching-loop. | |
2338 | (define (set-batch-mode?! arg) #t) | |
2339 | (define (batch-mode?) #t) | |
4bbbcd5c | 2340 | |
0f2d19dd | 2341 | (define (error-catching-loop thunk) |
4bbbcd5c GH |
2342 | (let ((status #f) |
2343 | (interactive #t)) | |
8e44e7a0 | 2344 | (define (loop first) |
20edfbbd | 2345 | (let ((next |
8e44e7a0 | 2346 | (catch #t |
9a0d70e2 | 2347 | |
8e44e7a0 | 2348 | (lambda () |
56658166 NJ |
2349 | (call-with-unblocked-asyncs |
2350 | (lambda () | |
2351 | (with-traps | |
2352 | (lambda () | |
2353 | (first) | |
2354 | ||
2355 | ;; This line is needed because mark | |
2356 | ;; doesn't do closures quite right. | |
2357 | ;; Unreferenced locals should be | |
2358 | ;; collected. | |
2359 | (set! first #f) | |
2360 | (let loop ((v (thunk))) | |
2361 | (loop (thunk))) | |
2362 | #f))))) | |
20edfbbd | 2363 | |
8e44e7a0 GH |
2364 | (lambda (key . args) |
2365 | (case key | |
2366 | ((quit) | |
8e44e7a0 GH |
2367 | (set! status args) |
2368 | #f) | |
2369 | ||
2370 | ((switch-repl) | |
2371 | (apply throw 'switch-repl args)) | |
2372 | ||
2373 | ((abort) | |
2374 | ;; This is one of the closures that require | |
2375 | ;; (set! first #f) above | |
2376 | ;; | |
2377 | (lambda () | |
04efd24d | 2378 | (run-hook abort-hook) |
e13c54c4 | 2379 | (force-output (current-output-port)) |
8e44e7a0 GH |
2380 | (display "ABORT: " (current-error-port)) |
2381 | (write args (current-error-port)) | |
2382 | (newline (current-error-port)) | |
4bbbcd5c | 2383 | (if interactive |
e13c54c4 JB |
2384 | (begin |
2385 | (if (and | |
2386 | (not has-shown-debugger-hint?) | |
2387 | (not (memq 'backtrace | |
2388 | (debug-options-interface))) | |
2389 | (stack? (fluid-ref the-last-stack))) | |
2390 | (begin | |
2391 | (newline (current-error-port)) | |
2392 | (display | |
cb546c61 | 2393 | "Type \"(backtrace)\" to get more information or \"(debug)\" to enter the debugger.\n" |
e13c54c4 JB |
2394 | (current-error-port)) |
2395 | (set! has-shown-debugger-hint? #t))) | |
2396 | (force-output (current-error-port))) | |
2397 | (begin | |
2398 | (primitive-exit 1))) | |
8e44e7a0 GH |
2399 | (set! stack-saved? #f))) |
2400 | ||
2401 | (else | |
2402 | ;; This is the other cons-leak closure... | |
2403 | (lambda () | |
2404 | (cond ((= (length args) 4) | |
2405 | (apply handle-system-error key args)) | |
2406 | (else | |
56658166 NJ |
2407 | (apply bad-throw key args))))))) |
2408 | ||
2409 | ;; Note that having just `lazy-handler-dispatch' | |
2410 | ;; here is connected with the mechanism that | |
2411 | ;; produces a nice backtrace upon error. If, for | |
2412 | ;; example, this is replaced with (lambda args | |
2413 | ;; (apply lazy-handler-dispatch args)), the stack | |
2414 | ;; cutting (in save-stack) goes wrong and ends up | |
2415 | ;; saving no stack at all, so there is no | |
2416 | ;; backtrace. | |
2417 | lazy-handler-dispatch))) | |
2418 | ||
8e44e7a0 | 2419 | (if next (loop next) status))) |
5f5f2642 | 2420 | (set! set-batch-mode?! (lambda (arg) |
20edfbbd | 2421 | (cond (arg |
5f5f2642 MD |
2422 | (set! interactive #f) |
2423 | (restore-signals)) | |
2424 | (#t | |
2425 | (error "sorry, not implemented"))))) | |
2426 | (set! batch-mode? (lambda () (not interactive))) | |
bb00edfa MV |
2427 | (call-with-blocked-asyncs |
2428 | (lambda () (loop (lambda () #t)))))) | |
0f2d19dd | 2429 | |
8bb7f646 | 2430 | ;;(define the-last-stack (make-fluid)) Defined by scm_init_backtrace () |
8087b6be | 2431 | (define before-signal-stack (make-fluid)) |
21ed9efe MD |
2432 | (define stack-saved? #f) |
2433 | ||
2434 | (define (save-stack . narrowing) | |
edc185c7 MD |
2435 | (or stack-saved? |
2436 | (cond ((not (memq 'debug (debug-options-interface))) | |
2437 | (fluid-set! the-last-stack #f) | |
2438 | (set! stack-saved? #t)) | |
2439 | (else | |
2440 | (fluid-set! | |
2441 | the-last-stack | |
2442 | (case (stack-id #t) | |
2443 | ((repl-stack) | |
704f4e86 | 2444 | (apply make-stack #t save-stack primitive-eval #t 0 narrowing)) |
edc185c7 MD |
2445 | ((load-stack) |
2446 | (apply make-stack #t save-stack 0 #t 0 narrowing)) | |
2447 | ((tk-stack) | |
2448 | (apply make-stack #t save-stack tk-stack-mark #t 0 narrowing)) | |
2449 | ((#t) | |
2450 | (apply make-stack #t save-stack 0 1 narrowing)) | |
2451 | (else | |
2452 | (let ((id (stack-id #t))) | |
2453 | (and (procedure? id) | |
2454 | (apply make-stack #t save-stack id #t 0 narrowing)))))) | |
2455 | (set! stack-saved? #t))))) | |
1c6cd8e8 | 2456 | |
3e3cec45 MD |
2457 | (define before-error-hook (make-hook)) |
2458 | (define after-error-hook (make-hook)) | |
2459 | (define before-backtrace-hook (make-hook)) | |
2460 | (define after-backtrace-hook (make-hook)) | |
1c6cd8e8 | 2461 | |
21ed9efe MD |
2462 | (define has-shown-debugger-hint? #f) |
2463 | ||
35c5db87 GH |
2464 | (define (handle-system-error key . args) |
2465 | (let ((cep (current-error-port))) | |
8bb7f646 | 2466 | (cond ((not (stack? (fluid-ref the-last-stack)))) |
21ed9efe | 2467 | ((memq 'backtrace (debug-options-interface)) |
5d8d0849 MV |
2468 | (let ((highlights (if (or (eq? key 'wrong-type-arg) |
2469 | (eq? key 'out-of-range)) | |
2470 | (list-ref args 3) | |
2471 | '()))) | |
2472 | (run-hook before-backtrace-hook) | |
2473 | (newline cep) | |
2474 | (display "Backtrace:\n") | |
2475 | (display-backtrace (fluid-ref the-last-stack) cep | |
2476 | #f #f highlights) | |
2477 | (newline cep) | |
2478 | (run-hook after-backtrace-hook)))) | |
04efd24d | 2479 | (run-hook before-error-hook) |
8bb7f646 | 2480 | (apply display-error (fluid-ref the-last-stack) cep args) |
04efd24d | 2481 | (run-hook after-error-hook) |
35c5db87 GH |
2482 | (force-output cep) |
2483 | (throw 'abort key))) | |
21ed9efe | 2484 | |
0f2d19dd JB |
2485 | (define (quit . args) |
2486 | (apply throw 'quit args)) | |
2487 | ||
7950df7c GH |
2488 | (define exit quit) |
2489 | ||
d590bbf6 MD |
2490 | ;;(define has-shown-backtrace-hint? #f) Defined by scm_init_backtrace () |
2491 | ||
2492 | ;; Replaced by C code: | |
2493 | ;;(define (backtrace) | |
8bb7f646 | 2494 | ;; (if (fluid-ref the-last-stack) |
d590bbf6 MD |
2495 | ;; (begin |
2496 | ;; (newline) | |
8bb7f646 | 2497 | ;; (display-backtrace (fluid-ref the-last-stack) (current-output-port)) |
d590bbf6 MD |
2498 | ;; (newline) |
2499 | ;; (if (and (not has-shown-backtrace-hint?) | |
2500 | ;; (not (memq 'backtrace (debug-options-interface)))) | |
2501 | ;; (begin | |
2502 | ;; (display | |
2503 | ;;"Type \"(debug-enable 'backtrace)\" if you would like a backtrace | |
2504 | ;;automatically if an error occurs in the future.\n") | |
2505 | ;; (set! has-shown-backtrace-hint? #t)))) | |
2506 | ;; (display "No backtrace available.\n"))) | |
21ed9efe | 2507 | |
0f2d19dd | 2508 | (define (error-catching-repl r e p) |
5f89fb13 MV |
2509 | (error-catching-loop |
2510 | (lambda () | |
2511 | (call-with-values (lambda () (e (r))) | |
2512 | (lambda the-values (for-each p the-values)))))) | |
0f2d19dd JB |
2513 | |
2514 | (define (gc-run-time) | |
2515 | (cdr (assq 'gc-time-taken (gc-stats)))) | |
2516 | ||
3e3cec45 MD |
2517 | (define before-read-hook (make-hook)) |
2518 | (define after-read-hook (make-hook)) | |
870777d7 KN |
2519 | (define before-eval-hook (make-hook 1)) |
2520 | (define after-eval-hook (make-hook 1)) | |
2521 | (define before-print-hook (make-hook 1)) | |
2522 | (define after-print-hook (make-hook 1)) | |
1c6cd8e8 | 2523 | |
dc5c2038 MD |
2524 | ;;; The default repl-reader function. We may override this if we've |
2525 | ;;; the readline library. | |
2526 | (define repl-reader | |
2527 | (lambda (prompt) | |
2528 | (display prompt) | |
2529 | (force-output) | |
04efd24d | 2530 | (run-hook before-read-hook) |
27d64e2b | 2531 | ((or (fluid-ref current-reader) read) (current-input-port)))) |
dc5c2038 | 2532 | |
0f2d19dd | 2533 | (define (scm-style-repl) |
9d774814 | 2534 | |
0f2d19dd JB |
2535 | (letrec ( |
2536 | (start-gc-rt #f) | |
2537 | (start-rt #f) | |
0f2d19dd JB |
2538 | (repl-report-start-timing (lambda () |
2539 | (set! start-gc-rt (gc-run-time)) | |
2540 | (set! start-rt (get-internal-run-time)))) | |
2541 | (repl-report (lambda () | |
2542 | (display ";;; ") | |
2543 | (display (inexact->exact | |
2544 | (* 1000 (/ (- (get-internal-run-time) start-rt) | |
2545 | internal-time-units-per-second)))) | |
2546 | (display " msec (") | |
2547 | (display (inexact->exact | |
2548 | (* 1000 (/ (- (gc-run-time) start-gc-rt) | |
2549 | internal-time-units-per-second)))) | |
2550 | (display " msec in gc)\n"))) | |
480977d0 JB |
2551 | |
2552 | (consume-trailing-whitespace | |
2553 | (lambda () | |
2554 | (let ((ch (peek-char))) | |
2555 | (cond | |
2556 | ((eof-object? ch)) | |
2557 | ((or (char=? ch #\space) (char=? ch #\tab)) | |
2558 | (read-char) | |
2559 | (consume-trailing-whitespace)) | |
2560 | ((char=? ch #\newline) | |
2561 | (read-char)))))) | |
0f2d19dd | 2562 | (-read (lambda () |
dc5c2038 MD |
2563 | (let ((val |
2564 | (let ((prompt (cond ((string? scm-repl-prompt) | |
2565 | scm-repl-prompt) | |
2566 | ((thunk? scm-repl-prompt) | |
2567 | (scm-repl-prompt)) | |
2568 | (scm-repl-prompt "> ") | |
2569 | (else "")))) | |
2570 | (repl-reader prompt)))) | |
2571 | ||
480977d0 | 2572 | ;; As described in R4RS, the READ procedure updates the |
e13c54c4 | 2573 | ;; port to point to the first character past the end of |
480977d0 JB |
2574 | ;; the external representation of the object. This |
2575 | ;; means that it doesn't consume the newline typically | |
2576 | ;; found after an expression. This means that, when | |
2577 | ;; debugging Guile with GDB, GDB gets the newline, which | |
2578 | ;; it often interprets as a "continue" command, making | |
2579 | ;; breakpoints kind of useless. So, consume any | |
2580 | ;; trailing newline here, as well as any whitespace | |
2581 | ;; before it. | |
e13c54c4 JB |
2582 | ;; But not if EOF, for control-D. |
2583 | (if (not (eof-object? val)) | |
2584 | (consume-trailing-whitespace)) | |
04efd24d | 2585 | (run-hook after-read-hook) |
0f2d19dd JB |
2586 | (if (eof-object? val) |
2587 | (begin | |
7950df7c | 2588 | (repl-report-start-timing) |
0f2d19dd JB |
2589 | (if scm-repl-verbose |
2590 | (begin | |
2591 | (newline) | |
2592 | (display ";;; EOF -- quitting") | |
2593 | (newline))) | |
2594 | (quit 0))) | |
2595 | val))) | |
2596 | ||
2597 | (-eval (lambda (sourc) | |
2598 | (repl-report-start-timing) | |
870777d7 KN |
2599 | (run-hook before-eval-hook sourc) |
2600 | (let ((val (start-stack 'repl-stack | |
2601 | ;; If you change this procedure | |
2602 | ;; (primitive-eval), please also | |
2603 | ;; modify the repl-stack case in | |
2604 | ;; save-stack so that stack cutting | |
2605 | ;; continues to work. | |
2606 | (primitive-eval sourc)))) | |
2607 | (run-hook after-eval-hook sourc) | |
2608 | val))) | |
20edfbbd | 2609 | |
0f2d19dd | 2610 | |
44484f52 MD |
2611 | (-print (let ((maybe-print (lambda (result) |
2612 | (if (or scm-repl-print-unspecified | |
2613 | (not (unspecified? result))) | |
2614 | (begin | |
2615 | (write result) | |
2616 | (newline)))))) | |
2617 | (lambda (result) | |
2618 | (if (not scm-repl-silent) | |
2619 | (begin | |
870777d7 | 2620 | (run-hook before-print-hook result) |
3923fa6d | 2621 | (maybe-print result) |
870777d7 | 2622 | (run-hook after-print-hook result) |
44484f52 MD |
2623 | (if scm-repl-verbose |
2624 | (repl-report)) | |
2625 | (force-output)))))) | |
0f2d19dd | 2626 | |
8e44e7a0 | 2627 | (-quit (lambda (args) |
0f2d19dd JB |
2628 | (if scm-repl-verbose |
2629 | (begin | |
2630 | (display ";;; QUIT executed, repl exitting") | |
2631 | (newline) | |
2632 | (repl-report))) | |
8e44e7a0 | 2633 | args)) |
0f2d19dd JB |
2634 | |
2635 | (-abort (lambda () | |
2636 | (if scm-repl-verbose | |
2637 | (begin | |
2638 | (display ";;; ABORT executed.") | |
2639 | (newline) | |
2640 | (repl-report))) | |
2641 | (repl -read -eval -print)))) | |
2642 | ||
8e44e7a0 GH |
2643 | (let ((status (error-catching-repl -read |
2644 | -eval | |
2645 | -print))) | |
2646 | (-quit status)))) | |
20edfbbd | 2647 | |
0f2d19dd | 2648 | |
0f2d19dd | 2649 | \f |
3d2ada2f | 2650 | |
44cf1f0f | 2651 | ;;; {IOTA functions: generating lists of numbers} |
3d2ada2f | 2652 | ;;; |
0f2d19dd | 2653 | |
e69cd299 MD |
2654 | (define (iota n) |
2655 | (let loop ((count (1- n)) (result '())) | |
2656 | (if (< count 0) result | |
2657 | (loop (1- count) (cons count result))))) | |
0f2d19dd JB |
2658 | |
2659 | \f | |
3d2ada2f | 2660 | |
7398c2c2 MD |
2661 | ;;; {collect} |
2662 | ;;; | |
2663 | ;;; Similar to `begin' but returns a list of the results of all constituent | |
2664 | ;;; forms instead of the result of the last form. | |
2665 | ;;; (The definition relies on the current left-to-right | |
2666 | ;;; order of evaluation of operands in applications.) | |
3d2ada2f | 2667 | ;;; |
7398c2c2 MD |
2668 | |
2669 | (defmacro collect forms | |
2670 | (cons 'list forms)) | |
0f2d19dd | 2671 | |
3d2ada2f DH |
2672 | \f |
2673 | ||
8a6a8671 | 2674 | ;;; {with-fluids} |
3d2ada2f | 2675 | ;;; |
8a6a8671 MV |
2676 | |
2677 | ;; with-fluids is a convenience wrapper for the builtin procedure | |
2678 | ;; `with-fluids*'. The syntax is just like `let': | |
2679 | ;; | |
2680 | ;; (with-fluids ((fluid val) | |
2681 | ;; ...) | |
2682 | ;; body) | |
2683 | ||
2684 | (defmacro with-fluids (bindings . body) | |
062fccce MV |
2685 | (let ((fluids (map car bindings)) |
2686 | (values (map cadr bindings))) | |
2687 | (if (and (= (length fluids) 1) (= (length values) 1)) | |
2688 | `(with-fluid* ,(car fluids) ,(car values) (lambda () ,@body)) | |
2689 | `(with-fluids* (list ,@fluids) (list ,@values) | |
2690 | (lambda () ,@body))))) | |
8a6a8671 | 2691 | |
0f2d19dd JB |
2692 | \f |
2693 | ||
2694 | ;;; {Macros} | |
2695 | ;;; | |
2696 | ||
2697 | ;; actually....hobbit might be able to hack these with a little | |
2698 | ;; coaxing | |
2699 | ;; | |
2700 | ||
3d2ada2f DH |
2701 | (define (primitive-macro? m) |
2702 | (and (macro? m) | |
2703 | (not (macro-transformer m)))) | |
2704 | ||
0f2d19dd JB |
2705 | (defmacro define-macro (first . rest) |
2706 | (let ((name (if (symbol? first) first (car first))) | |
2707 | (transformer | |
2708 | (if (symbol? first) | |
2709 | (car rest) | |
2710 | `(lambda ,(cdr first) ,@rest)))) | |
8add1522 KN |
2711 | `(eval-case |
2712 | ((load-toplevel) | |
2713 | (define ,name (defmacro:transformer ,transformer))) | |
2714 | (else | |
2715 | (error "define-macro can only be used at the top level"))))) | |
0f2d19dd JB |
2716 | |
2717 | ||
2718 | (defmacro define-syntax-macro (first . rest) | |
2719 | (let ((name (if (symbol? first) first (car first))) | |
2720 | (transformer | |
2721 | (if (symbol? first) | |
2722 | (car rest) | |
2723 | `(lambda ,(cdr first) ,@rest)))) | |
8add1522 KN |
2724 | `(eval-case |
2725 | ((load-toplevel) | |
2726 | (define ,name (defmacro:syntax-transformer ,transformer))) | |
2727 | (else | |
2728 | (error "define-syntax-macro can only be used at the top level"))))) | |
645e38d9 | 2729 | |
3d2ada2f DH |
2730 | \f |
2731 | ||
773abfbb KR |
2732 | ;;; {While} |
2733 | ;;; | |
2734 | ;;; with `continue' and `break'. | |
2735 | ;;; | |
2736 | ||
2737 | ;; The inner `do' loop avoids re-establishing a catch every iteration, | |
5578a53f KR |
2738 | ;; that's only necessary if continue is actually used. A new key is |
2739 | ;; generated every time, so break and continue apply to their originating | |
2740 | ;; `while' even when recursing. `while-helper' is an easy way to keep the | |
2741 | ;; `key' binding away from the cond and body code. | |
773abfbb | 2742 | ;; |
c8fc38b1 KR |
2743 | ;; FIXME: This is supposed to have an `unquote' on the `do' the same used |
2744 | ;; for lambda and not, so as to protect against any user rebinding of that | |
2745 | ;; symbol, but unfortunately an unquote breaks with ice-9 syncase, eg. | |
2746 | ;; | |
2747 | ;; (use-modules (ice-9 syncase)) | |
2748 | ;; (while #f) | |
2749 | ;; => ERROR: invalid syntax () | |
2750 | ;; | |
2751 | ;; This is probably a bug in syncase. | |
2752 | ;; | |
773abfbb | 2753 | (define-macro (while cond . body) |
5578a53f KR |
2754 | (define (while-helper proc) |
2755 | (do ((key (make-symbol "while-key"))) | |
2756 | ((catch key | |
2757 | (lambda () | |
2758 | (proc (lambda () (throw key #t)) | |
2759 | (lambda () (throw key #f)))) | |
2760 | (lambda (key arg) arg))))) | |
2761 | `(,while-helper (,lambda (break continue) | |
c8fc38b1 | 2762 | (do () |
773abfbb KR |
2763 | ((,not ,cond)) |
2764 | ,@body) | |
5578a53f KR |
2765 | #t))) |
2766 | ||
773abfbb | 2767 | |
0f2d19dd | 2768 | \f |
3d2ada2f | 2769 | |
0f2d19dd JB |
2770 | ;;; {Module System Macros} |
2771 | ;;; | |
2772 | ||
532cf805 MV |
2773 | ;; Return a list of expressions that evaluate to the appropriate |
2774 | ;; arguments for resolve-interface according to SPEC. | |
2775 | ||
2776 | (define (compile-interface-spec spec) | |
2777 | (define (make-keyarg sym key quote?) | |
2778 | (cond ((or (memq sym spec) | |
2779 | (memq key spec)) | |
2780 | => (lambda (rest) | |
2781 | (if quote? | |
2782 | (list key (list 'quote (cadr rest))) | |
2783 | (list key (cadr rest))))) | |
2784 | (else | |
2785 | '()))) | |
2786 | (define (map-apply func list) | |
2787 | (map (lambda (args) (apply func args)) list)) | |
bbf5a913 | 2788 | (define keys |
532cf805 MV |
2789 | ;; sym key quote? |
2790 | '((:select #:select #t) | |
c614a00b | 2791 | (:hide #:hide #t) |
f595ccfe | 2792 | (:prefix #:prefix #t) |
6672871b | 2793 | (:renamer #:renamer #f))) |
532cf805 MV |
2794 | (if (not (pair? (car spec))) |
2795 | `(',spec) | |
2796 | `(',(car spec) | |
2797 | ,@(apply append (map-apply make-keyarg keys))))) | |
2798 | ||
2799 | (define (keyword-like-symbol->keyword sym) | |
2800 | (symbol->keyword (string->symbol (substring (symbol->string sym) 1)))) | |
2801 | ||
2802 | (define (compile-define-module-args args) | |
2803 | ;; Just quote everything except #:use-module and #:use-syntax. We | |
2804 | ;; need to know about all arguments regardless since we want to turn | |
2805 | ;; symbols that look like keywords into real keywords, and the | |
2806 | ;; keyword args in a define-module form are not regular | |
2807 | ;; (i.e. no-backtrace doesn't take a value). | |
2808 | (let loop ((compiled-args `((quote ,(car args)))) | |
2809 | (args (cdr args))) | |
2810 | (cond ((null? args) | |
2811 | (reverse! compiled-args)) | |
2812 | ;; symbol in keyword position | |
2813 | ((symbol? (car args)) | |
2814 | (loop compiled-args | |
2815 | (cons (keyword-like-symbol->keyword (car args)) (cdr args)))) | |
2816 | ((memq (car args) '(#:no-backtrace #:pure)) | |
2817 | (loop (cons (car args) compiled-args) | |
2818 | (cdr args))) | |
2819 | ((null? (cdr args)) | |
2820 | (error "keyword without value:" (car args))) | |
2821 | ((memq (car args) '(#:use-module #:use-syntax)) | |
2822 | (loop (cons* `(list ,@(compile-interface-spec (cadr args))) | |
2823 | (car args) | |
2824 | compiled-args) | |
2825 | (cddr args))) | |
2826 | ((eq? (car args) #:autoload) | |
2827 | (loop (cons* `(quote ,(caddr args)) | |
2828 | `(quote ,(cadr args)) | |
2829 | (car args) | |
2830 | compiled-args) | |
2831 | (cdddr args))) | |
2832 | (else | |
2833 | (loop (cons* `(quote ,(cadr args)) | |
2834 | (car args) | |
2835 | compiled-args) | |
2836 | (cddr args)))))) | |
2837 | ||
0f2d19dd | 2838 | (defmacro define-module args |
7b748b16 | 2839 | `(eval-case |
645e38d9 | 2840 | ((load-toplevel) |
bbf5a913 | 2841 | (let ((m (process-define-module |
532cf805 | 2842 | (list ,@(compile-define-module-args args))))) |
25afac98 MV |
2843 | (set-current-module m) |
2844 | m)) | |
645e38d9 MV |
2845 | (else |
2846 | (error "define-module can only be used at the top level")))) | |
0f2d19dd | 2847 | |
532cf805 MV |
2848 | ;; The guts of the use-modules macro. Add the interfaces of the named |
2849 | ;; modules to the use-list of the current module, in order. | |
2850 | ||
482a28f9 MV |
2851 | ;; This function is called by "modules.c". If you change it, be sure |
2852 | ;; to change scm_c_use_module as well. | |
2853 | ||
532cf805 | 2854 | (define (process-use-modules module-interface-args) |
d57da08b MD |
2855 | (let ((interfaces (map (lambda (mif-args) |
2856 | (or (apply resolve-interface mif-args) | |
2857 | (error "no such module" mif-args))) | |
2858 | module-interface-args))) | |
2859 | (call-with-deferred-observers | |
2860 | (lambda () | |
2861 | (module-use-interfaces! (current-module) interfaces))))) | |
89da9036 | 2862 | |
33cf699f | 2863 | (defmacro use-modules modules |
7b748b16 | 2864 | `(eval-case |
645e38d9 | 2865 | ((load-toplevel) |
532cf805 MV |
2866 | (process-use-modules |
2867 | (list ,@(map (lambda (m) | |
2868 | `(list ,@(compile-interface-spec m))) | |
7b07e5ef MD |
2869 | modules))) |
2870 | *unspecified*) | |
645e38d9 MV |
2871 | (else |
2872 | (error "use-modules can only be used at the top level")))) | |
33cf699f | 2873 | |
cf266109 | 2874 | (defmacro use-syntax (spec) |
7b748b16 | 2875 | `(eval-case |
645e38d9 | 2876 | ((load-toplevel) |
7cbaee0c | 2877 | ,@(if (pair? spec) |
532cf805 MV |
2878 | `((process-use-modules (list |
2879 | (list ,@(compile-interface-spec spec)))) | |
7cbaee0c MD |
2880 | (set-module-transformer! (current-module) |
2881 | ,(car (last-pair spec)))) | |
cf743aea MD |
2882 | `((set-module-transformer! (current-module) ,spec))) |
2883 | *unspecified*) | |
645e38d9 | 2884 | (else |
4879243c | 2885 | (error "use-syntax can only be used at the top level")))) |
7a0ff2f8 | 2886 | |
9123414e DH |
2887 | ;; Dirk:FIXME:: This incorrect (according to R5RS) syntax needs to be changed |
2888 | ;; as soon as guile supports hygienic macros. | |
2889 | (define define-private define) | |
0f2d19dd JB |
2890 | |
2891 | (defmacro define-public args | |
2892 | (define (syntax) | |
2893 | (error "bad syntax" (list 'define-public args))) | |
2894 | (define (defined-name n) | |
2895 | (cond | |
3c5af9ef JB |
2896 | ((symbol? n) n) |
2897 | ((pair? n) (defined-name (car n))) | |
2898 | (else (syntax)))) | |
0f2d19dd | 2899 | (cond |
645e38d9 MV |
2900 | ((null? args) |
2901 | (syntax)) | |
2902 | (#t | |
2903 | (let ((name (defined-name (car args)))) | |
2904 | `(begin | |
a482f2cc MV |
2905 | (define-private ,@args) |
2906 | (eval-case ((load-toplevel) (export ,name)))))))) | |
0f2d19dd JB |
2907 | |
2908 | (defmacro defmacro-public args | |
2909 | (define (syntax) | |
2910 | (error "bad syntax" (list 'defmacro-public args))) | |
2911 | (define (defined-name n) | |
2912 | (cond | |
645e38d9 MV |
2913 | ((symbol? n) n) |
2914 | (else (syntax)))) | |
0f2d19dd | 2915 | (cond |
645e38d9 MV |
2916 | ((null? args) |
2917 | (syntax)) | |
2918 | (#t | |
2919 | (let ((name (defined-name (car args)))) | |
2920 | `(begin | |
d57da08b | 2921 | (eval-case ((load-toplevel) (export-syntax ,name))) |
645e38d9 | 2922 | (defmacro ,@args)))))) |
0f2d19dd | 2923 | |
89d06712 | 2924 | ;; Export a local variable |
482a28f9 MV |
2925 | |
2926 | ;; This function is called from "modules.c". If you change it, be | |
2927 | ;; sure to update "modules.c" as well. | |
2928 | ||
90847923 MD |
2929 | (define (module-export! m names) |
2930 | (let ((public-i (module-public-interface m))) | |
2931 | (for-each (lambda (name) | |
89d06712 MV |
2932 | (let ((var (module-ensure-local-variable! m name))) |
2933 | (module-add! public-i name var))) | |
2934 | names))) | |
2935 | ||
f595ccfe MD |
2936 | (define (module-replace! m names) |
2937 | (let ((public-i (module-public-interface m))) | |
2938 | (for-each (lambda (name) | |
2939 | (let ((var (module-ensure-local-variable! m name))) | |
2940 | (set-object-property! var 'replace #t) | |
2941 | (module-add! public-i name var))) | |
2942 | names))) | |
2943 | ||
89d06712 MV |
2944 | ;; Re-export a imported variable |
2945 | ;; | |
2946 | (define (module-re-export! m names) | |
2947 | (let ((public-i (module-public-interface m))) | |
2948 | (for-each (lambda (name) | |
2949 | (let ((var (module-variable m name))) | |
2950 | (cond ((not var) | |
2951 | (error "Undefined variable:" name)) | |
2952 | ((eq? var (module-local-variable m name)) | |
2953 | (error "re-exporting local variable:" name)) | |
2954 | (else | |
2955 | (module-add! public-i name var))))) | |
90847923 MD |
2956 | names))) |
2957 | ||
a0cc0a01 | 2958 | (defmacro export names |
7b748b16 | 2959 | `(eval-case |
645e38d9 | 2960 | ((load-toplevel) |
d57da08b MD |
2961 | (call-with-deferred-observers |
2962 | (lambda () | |
2963 | (module-export! (current-module) ',names)))) | |
645e38d9 MV |
2964 | (else |
2965 | (error "export can only be used at the top level")))) | |
a0cc0a01 | 2966 | |
89d06712 MV |
2967 | (defmacro re-export names |
2968 | `(eval-case | |
2969 | ((load-toplevel) | |
d57da08b MD |
2970 | (call-with-deferred-observers |
2971 | (lambda () | |
2972 | (module-re-export! (current-module) ',names)))) | |
89d06712 MV |
2973 | (else |
2974 | (error "re-export can only be used at the top level")))) | |
2975 | ||
ab382f52 | 2976 | (defmacro export-syntax names |
6aa9ea7c | 2977 | `(export ,@names)) |
a0cc0a01 | 2978 | |
f2cbc0e5 DH |
2979 | (defmacro re-export-syntax names |
2980 | `(re-export ,@names)) | |
a0cc0a01 | 2981 | |
0f2d19dd JB |
2982 | (define load load-module) |
2983 | ||
473687d1 MV |
2984 | ;; The following macro allows one to write, for example, |
2985 | ;; | |
2986 | ;; (@ (ice-9 pretty-print) pretty-print) | |
2987 | ;; | |
2988 | ;; to refer directly to the pretty-print variable in module (ice-9 | |
2989 | ;; pretty-print). It works by looking up the variable and inserting | |
2990 | ;; it directly into the code. This is understood by the evaluator. | |
2991 | ;; Indeed, all references to global variables are memoized into such | |
2992 | ;; variable objects. | |
2993 | ||
2994 | (define-macro (@ mod-name var-name) | |
2995 | (let ((var (module-variable (resolve-interface mod-name) var-name))) | |
2996 | (if (not var) | |
2997 | (error "no such public variable" (list '@ mod-name var-name))) | |
2998 | var)) | |
2999 | ||
3000 | ;; The '@@' macro is like '@' but it can also access bindings that | |
3001 | ;; have not been explicitely exported. | |
3002 | ||
3003 | (define-macro (@@ mod-name var-name) | |
3004 | (let ((var (module-variable (resolve-module mod-name) var-name))) | |
3005 | (if (not var) | |
3006 | (error "no such variable" (list '@@ mod-name var-name))) | |
3007 | var)) | |
3008 | ||
7f24bc58 | 3009 | \f |
3d2ada2f | 3010 | |
f595ccfe MD |
3011 | ;;; {Parameters} |
3012 | ;;; | |
3013 | ||
3014 | (define make-mutable-parameter | |
3015 | (let ((make (lambda (fluid converter) | |
3016 | (lambda args | |
3017 | (if (null? args) | |
3018 | (fluid-ref fluid) | |
3019 | (fluid-set! fluid (converter (car args)))))))) | |
3020 | (lambda (init . converter) | |
3021 | (let ((fluid (make-fluid)) | |
3022 | (converter (if (null? converter) | |
3023 | identity | |
3024 | (car converter)))) | |
3025 | (fluid-set! fluid (converter init)) | |
3026 | (make fluid converter))))) | |
3027 | ||
3028 | \f | |
3d2ada2f | 3029 | |
7b07e5ef MD |
3030 | ;;; {Handling of duplicate imported bindings} |
3031 | ;;; | |
3032 | ||
3033 | ;; Duplicate handlers take the following arguments: | |
3034 | ;; | |
3035 | ;; module importing module | |
3036 | ;; name conflicting name | |
3037 | ;; int1 old interface where name occurs | |
3038 | ;; val1 value of binding in old interface | |
3039 | ;; int2 new interface where name occurs | |
3040 | ;; val2 value of binding in new interface | |
3041 | ;; var previous resolution or #f | |
3042 | ;; val value of previous resolution | |
3043 | ;; | |
3044 | ;; A duplicate handler can take three alternative actions: | |
3045 | ;; | |
3046 | ;; 1. return #f => leave responsibility to next handler | |
3047 | ;; 2. exit with an error | |
3048 | ;; 3. return a variable resolving the conflict | |
3049 | ;; | |
3050 | ||
3051 | (define duplicate-handlers | |
3052 | (let ((m (make-module 7))) | |
f595ccfe MD |
3053 | |
3054 | (define (check module name int1 val1 int2 val2 var val) | |
3055 | (scm-error 'misc-error | |
3056 | #f | |
8dd18cea | 3057 | "~A: `~A' imported from both ~A and ~A" |
f595ccfe MD |
3058 | (list (module-name module) |
3059 | name | |
3060 | (module-name int1) | |
3061 | (module-name int2)) | |
3062 | #f)) | |
3063 | ||
65bed4aa MD |
3064 | (define (warn module name int1 val1 int2 val2 var val) |
3065 | (format #t | |
3066 | "WARNING: ~A: `~A' imported from both ~A and ~A\n" | |
3067 | (module-name module) | |
3068 | name | |
3069 | (module-name int1) | |
3070 | (module-name int2)) | |
3071 | #f) | |
f595ccfe MD |
3072 | |
3073 | (define (replace module name int1 val1 int2 val2 var val) | |
3074 | (let ((old (or (and var (object-property var 'replace) var) | |
3075 | (module-variable int1 name))) | |
3076 | (new (module-variable int2 name))) | |
3077 | (if (object-property old 'replace) | |
3078 | (and (or (eq? old new) | |
3079 | (not (object-property new 'replace))) | |
3080 | old) | |
3081 | (and (object-property new 'replace) | |
3082 | new)))) | |
3083 | ||
65bed4aa MD |
3084 | (define (warn-override-core module name int1 val1 int2 val2 var val) |
3085 | (and (eq? int1 the-scm-module) | |
3086 | (begin | |
3087 | (format #t | |
3088 | "WARNING: ~A: imported module ~A overrides core binding `~A'\n" | |
3089 | (module-name module) | |
3090 | (module-name int2) | |
3091 | name) | |
3092 | (module-local-variable int2 name)))) | |
f595ccfe | 3093 | |
65bed4aa MD |
3094 | (define (first module name int1 val1 int2 val2 var val) |
3095 | (or var (module-local-variable int1 name))) | |
f595ccfe | 3096 | |
65bed4aa MD |
3097 | (define (last module name int1 val1 int2 val2 var val) |
3098 | (module-local-variable int2 name)) | |
f595ccfe | 3099 | |
65bed4aa MD |
3100 | (define (noop module name int1 val1 int2 val2 var val) |
3101 | #f) | |
3102 | ||
7b07e5ef MD |
3103 | (set-module-name! m 'duplicate-handlers) |
3104 | (set-module-kind! m 'interface) | |
f595ccfe MD |
3105 | (module-define! m 'check check) |
3106 | (module-define! m 'warn warn) | |
3107 | (module-define! m 'replace replace) | |
3108 | (module-define! m 'warn-override-core warn-override-core) | |
3109 | (module-define! m 'first first) | |
3110 | (module-define! m 'last last) | |
65bed4aa MD |
3111 | (module-define! m 'merge-generics noop) |
3112 | (module-define! m 'merge-accessors noop) | |
7b07e5ef MD |
3113 | m)) |
3114 | ||
f595ccfe | 3115 | (define (lookup-duplicates-handlers handler-names) |
109c2c9f MD |
3116 | (and handler-names |
3117 | (map (lambda (handler-name) | |
3118 | (or (module-symbol-local-binding | |
3119 | duplicate-handlers handler-name #f) | |
3120 | (error "invalid duplicate handler name:" | |
3121 | handler-name))) | |
3122 | (if (list? handler-names) | |
3123 | handler-names | |
3124 | (list handler-names))))) | |
f595ccfe | 3125 | |
70a459e3 MD |
3126 | (define default-duplicate-binding-procedures |
3127 | (make-mutable-parameter #f)) | |
3128 | ||
3129 | (define default-duplicate-binding-handler | |
6496a663 | 3130 | (make-mutable-parameter '(replace warn-override-core warn last) |
70a459e3 MD |
3131 | (lambda (handler-names) |
3132 | (default-duplicate-binding-procedures | |
3133 | (lookup-duplicates-handlers handler-names)) | |
3134 | handler-names))) | |
f595ccfe | 3135 | |
7b07e5ef MD |
3136 | (define (make-duplicates-interface) |
3137 | (let ((m (make-module))) | |
c614a00b | 3138 | (set-module-kind! m 'custom-interface) |
7b07e5ef MD |
3139 | (set-module-name! m 'duplicates) |
3140 | m)) | |
3141 | ||
7b07e5ef | 3142 | (define (process-duplicates module interface) |
8d8dac1f | 3143 | (let* ((duplicates-handlers (or (module-duplicates-handlers module) |
70a459e3 | 3144 | (default-duplicate-binding-procedures))) |
8d8dac1f | 3145 | (duplicates-interface (module-duplicates-interface module))) |
7b07e5ef MD |
3146 | (module-for-each |
3147 | (lambda (name var) | |
109c2c9f MD |
3148 | (cond ((module-import-interface module name) |
3149 | => | |
3150 | (lambda (prev-interface) | |
3151 | (let ((var1 (module-local-variable prev-interface name)) | |
3152 | (var2 (module-local-variable interface name))) | |
3153 | (if (not (eq? var1 var2)) | |
3154 | (begin | |
3155 | (if (not duplicates-interface) | |
3156 | (begin | |
3157 | (set! duplicates-interface | |
3158 | (make-duplicates-interface)) | |
8d8dac1f MD |
3159 | (set-module-duplicates-interface! |
3160 | module | |
3161 | duplicates-interface))) | |
109c2c9f MD |
3162 | (let* ((var (module-local-variable duplicates-interface |
3163 | name)) | |
3164 | (val (and var | |
3165 | (variable-bound? var) | |
3166 | (variable-ref var)))) | |
3167 | (let loop ((duplicates-handlers duplicates-handlers)) | |
3168 | (cond ((null? duplicates-handlers)) | |
3169 | (((car duplicates-handlers) | |
3170 | module | |
3171 | name | |
3172 | prev-interface | |
3173 | (and (variable-bound? var1) | |
3174 | (variable-ref var1)) | |
3175 | interface | |
3176 | (and (variable-bound? var2) | |
3177 | (variable-ref var2)) | |
3178 | var | |
3179 | val) | |
3180 | => | |
3181 | (lambda (var) | |
3182 | (module-add! duplicates-interface name var))) | |
3183 | (else | |
3184 | (loop (cdr duplicates-handlers))))))))))))) | |
7b07e5ef MD |
3185 | interface))) |
3186 | ||
3187 | \f | |
7f24bc58 MG |
3188 | |
3189 | ;;; {`cond-expand' for SRFI-0 support.} | |
3190 | ;;; | |
3191 | ;;; This syntactic form expands into different commands or | |
3192 | ;;; definitions, depending on the features provided by the Scheme | |
3193 | ;;; implementation. | |
3194 | ;;; | |
3195 | ;;; Syntax: | |
3196 | ;;; | |
3197 | ;;; <cond-expand> | |
3198 | ;;; --> (cond-expand <cond-expand-clause>+) | |
3199 | ;;; | (cond-expand <cond-expand-clause>* (else <command-or-definition>)) | |
3200 | ;;; <cond-expand-clause> | |
3201 | ;;; --> (<feature-requirement> <command-or-definition>*) | |
3202 | ;;; <feature-requirement> | |
3203 | ;;; --> <feature-identifier> | |
3204 | ;;; | (and <feature-requirement>*) | |
3205 | ;;; | (or <feature-requirement>*) | |
3206 | ;;; | (not <feature-requirement>) | |
3207 | ;;; <feature-identifier> | |
3208 | ;;; --> <a symbol which is the name or alias of a SRFI> | |
3209 | ;;; | |
3210 | ;;; Additionally, this implementation provides the | |
3211 | ;;; <feature-identifier>s `guile' and `r5rs', so that programs can | |
3212 | ;;; determine the implementation type and the supported standard. | |
3213 | ;;; | |
3214 | ;;; Currently, the following feature identifiers are supported: | |
3215 | ;;; | |
08b609aa | 3216 | ;;; guile r5rs srfi-0 srfi-4 srfi-6 srfi-13 srfi-14 srfi-55 srfi-61 |
7f24bc58 MG |
3217 | ;;; |
3218 | ;;; Remember to update the features list when adding more SRFIs. | |
3d2ada2f | 3219 | ;;; |
7f24bc58 | 3220 | |
b9b8f9da | 3221 | (define %cond-expand-features |
f41be016 | 3222 | ;; Adjust the above comment when changing this. |
018733ff KR |
3223 | '(guile |
3224 | r5rs | |
3225 | srfi-0 ;; cond-expand itself | |
85acb35f | 3226 | srfi-4 ;; homogenous numeric vectors |
018733ff | 3227 | srfi-6 ;; open-input-string etc, in the guile core |
4a276c08 MV |
3228 | srfi-13 ;; string library |
3229 | srfi-14 ;; character sets | |
344d68d5 | 3230 | srfi-55 ;; require-extension |
08b609aa | 3231 | srfi-61 ;; general cond clause |
018733ff | 3232 | )) |
1d00af09 | 3233 | |
b9b8f9da MG |
3234 | ;; This table maps module public interfaces to the list of features. |
3235 | ;; | |
3236 | (define %cond-expand-table (make-hash-table 31)) | |
3237 | ||
3238 | ;; Add one or more features to the `cond-expand' feature list of the | |
3239 | ;; module `module'. | |
3240 | ;; | |
3241 | (define (cond-expand-provide module features) | |
3242 | (let ((mod (module-public-interface module))) | |
3243 | (and mod | |
3244 | (hashq-set! %cond-expand-table mod | |
3245 | (append (hashq-ref %cond-expand-table mod '()) | |
3246 | features))))) | |
3247 | ||
9f79272a MV |
3248 | (define cond-expand |
3249 | (procedure->memoizing-macro | |
3250 | (lambda (exp env) | |
3251 | (let ((clauses (cdr exp)) | |
3252 | (syntax-error (lambda (cl) | |
3253 | (error "invalid clause in `cond-expand'" cl)))) | |
3254 | (letrec | |
3255 | ((test-clause | |
3256 | (lambda (clause) | |
7f24bc58 | 3257 | (cond |
9f79272a MV |
3258 | ((symbol? clause) |
3259 | (or (memq clause %cond-expand-features) | |
3260 | (let lp ((uses (module-uses (env-module env)))) | |
3261 | (if (pair? uses) | |
3262 | (or (memq clause | |
3263 | (hashq-ref %cond-expand-table | |
3264 | (car uses) '())) | |
3265 | (lp (cdr uses))) | |
3266 | #f)))) | |
3267 | ((pair? clause) | |
3268 | (cond | |
3269 | ((eq? 'and (car clause)) | |
3270 | (let lp ((l (cdr clause))) | |
3271 | (cond ((null? l) | |
3272 | #t) | |
3273 | ((pair? l) | |
3274 | (and (test-clause (car l)) (lp (cdr l)))) | |
3275 | (else | |
3276 | (syntax-error clause))))) | |
3277 | ((eq? 'or (car clause)) | |
3278 | (let lp ((l (cdr clause))) | |
3279 | (cond ((null? l) | |
3280 | #f) | |
3281 | ((pair? l) | |
3282 | (or (test-clause (car l)) (lp (cdr l)))) | |
3283 | (else | |
3284 | (syntax-error clause))))) | |
3285 | ((eq? 'not (car clause)) | |
3286 | (cond ((not (pair? (cdr clause))) | |
3287 | (syntax-error clause)) | |
3288 | ((pair? (cddr clause)) | |
3289 | ((syntax-error clause)))) | |
3290 | (not (test-clause (cadr clause)))) | |
3291 | (else | |
3292 | (syntax-error clause)))) | |
3293 | (else | |
3294 | (syntax-error clause)))))) | |
3295 | (let lp ((c clauses)) | |
3296 | (cond | |
3297 | ((null? c) | |
3298 | (error "Unfulfilled `cond-expand'")) | |
3299 | ((not (pair? c)) | |
7f24bc58 | 3300 | (syntax-error c)) |
9f79272a MV |
3301 | ((not (pair? (car c))) |
3302 | (syntax-error (car c))) | |
3303 | ((test-clause (caar c)) | |
3304 | `(begin ,@(cdar c))) | |
3305 | ((eq? (caar c) 'else) | |
3306 | (if (pair? (cdr c)) | |
3307 | (syntax-error c)) | |
3308 | `(begin ,@(cdar c))) | |
3309 | (else | |
3310 | (lp (cdr c)))))))))) | |
0f2d19dd | 3311 | |
f41be016 MG |
3312 | ;; This procedure gets called from the startup code with a list of |
3313 | ;; numbers, which are the numbers of the SRFIs to be loaded on startup. | |
3314 | ;; | |
3315 | (define (use-srfis srfis) | |
9a18d8d4 KR |
3316 | (process-use-modules |
3317 | (map (lambda (num) | |
3318 | (list (list 'srfi (string->symbol | |
3319 | (string-append "srfi-" (number->string num)))))) | |
3320 | srfis))) | |
f8a502cb | 3321 | |
0f2d19dd | 3322 | \f |
9d774814 | 3323 | |
344d68d5 RB |
3324 | ;;; srfi-55: require-extension |
3325 | ;;; | |
3326 | ||
3327 | (define-macro (require-extension extension-spec) | |
3328 | ;; This macro only handles the srfi extension, which, at present, is | |
3329 | ;; the only one defined by the standard. | |
3330 | (if (not (pair? extension-spec)) | |
3331 | (scm-error 'wrong-type-arg "require-extension" | |
3332 | "Not an extension: ~S" (list extension-spec) #f)) | |
3333 | (let ((extension (car extension-spec)) | |
3334 | (extension-args (cdr extension-spec))) | |
3335 | (case extension | |
3336 | ((srfi) | |
3337 | (let ((use-list '())) | |
3338 | (for-each | |
3339 | (lambda (i) | |
3340 | (if (not (integer? i)) | |
3341 | (scm-error 'wrong-type-arg "require-extension" | |
3342 | "Invalid srfi name: ~S" (list i) #f)) | |
3343 | (let ((srfi-sym (string->symbol | |
3344 | (string-append "srfi-" (number->string i))))) | |
3345 | (if (not (memq srfi-sym %cond-expand-features)) | |
3346 | (set! use-list (cons `(use-modules (srfi ,srfi-sym)) | |
3347 | use-list))))) | |
3348 | extension-args) | |
3349 | (if (pair? use-list) | |
3350 | ;; i.e. (begin (use-modules x) (use-modules y) (use-modules z)) | |
3351 | `(begin ,@(reverse! use-list))))) | |
3352 | (else | |
3353 | (scm-error | |
3354 | 'wrong-type-arg "require-extension" | |
3355 | "Not a recognized extension type: ~S" (list extension) #f))))) | |
3356 | ||
3357 | \f | |
3358 | ||
9aca88c3 | 3359 | ;;; {Load emacs interface support if emacs option is given.} |
3d2ada2f | 3360 | ;;; |
9aca88c3 | 3361 | |
645e38d9 | 3362 | (define (named-module-use! user usee) |
89d06712 | 3363 | (module-use! (resolve-module user) (resolve-interface usee))) |
645e38d9 | 3364 | |
9aca88c3 | 3365 | (define (load-emacs-interface) |
fb1b76f4 TTN |
3366 | (and (provided? 'debug-extensions) |
3367 | (debug-enable 'backtrace)) | |
645e38d9 | 3368 | (named-module-use! '(guile-user) '(ice-9 emacs))) |
9aca88c3 JB |
3369 | |
3370 | \f | |
0f2d19dd | 3371 | |
755457ec MD |
3372 | (define using-readline? |
3373 | (let ((using-readline? (make-fluid))) | |
3374 | (make-procedure-with-setter | |
3375 | (lambda () (fluid-ref using-readline?)) | |
3376 | (lambda (v) (fluid-set! using-readline? v))))) | |
3377 | ||
20edfbbd | 3378 | (define (top-repl) |
615bfe72 MV |
3379 | (let ((guile-user-module (resolve-module '(guile-user)))) |
3380 | ||
3381 | ;; Load emacs interface support if emacs option is given. | |
454b82f4 MD |
3382 | (if (and (module-defined? guile-user-module 'use-emacs-interface) |
3383 | (module-ref guile-user-module 'use-emacs-interface)) | |
615bfe72 MV |
3384 | (load-emacs-interface)) |
3385 | ||
3386 | ;; Use some convenient modules (in reverse order) | |
bbf5a913 | 3387 | |
9a18d8d4 KR |
3388 | (set-current-module guile-user-module) |
3389 | (process-use-modules | |
3390 | (append | |
3391 | '(((ice-9 r5rs)) | |
3392 | ((ice-9 session)) | |
3393 | ((ice-9 debug))) | |
3394 | (if (provided? 'regex) | |
3395 | '(((ice-9 regex))) | |
3396 | '()) | |
3397 | (if (provided? 'threads) | |
3398 | '(((ice-9 threads))) | |
3399 | '()))) | |
615bfe72 | 3400 | ;; load debugger on demand |
bbf5a913 | 3401 | (module-use! guile-user-module |
615bfe72 MV |
3402 | (make-autoload-interface guile-user-module |
3403 | '(ice-9 debugger) '(debug))) | |
615bfe72 | 3404 | |
615bfe72 | 3405 | |
9a18d8d4 KR |
3406 | ;; Note: SIGFPE, SIGSEGV and SIGBUS are actually "query-only" (see |
3407 | ;; scmsigs.c scm_sigaction_for_thread), so the handlers setup here have | |
3408 | ;; no effect. | |
615bfe72 MV |
3409 | (let ((old-handlers #f) |
3410 | (signals (if (provided? 'posix) | |
3411 | `((,SIGINT . "User interrupt") | |
3412 | (,SIGFPE . "Arithmetic error") | |
615bfe72 MV |
3413 | (,SIGSEGV |
3414 | . "Bad memory access (Segmentation violation)")) | |
3415 | '()))) | |
9a18d8d4 KR |
3416 | ;; no SIGBUS on mingw |
3417 | (if (defined? 'SIGBUS) | |
3418 | (set! signals (acons SIGBUS "Bad memory access (bus error)" | |
3419 | signals))) | |
615bfe72 MV |
3420 | |
3421 | (dynamic-wind | |
3422 | ||
3423 | ;; call at entry | |
3424 | (lambda () | |
3425 | (let ((make-handler (lambda (msg) | |
3426 | (lambda (sig) | |
3427 | ;; Make a backup copy of the stack | |
3428 | (fluid-set! before-signal-stack | |
3429 | (fluid-ref the-last-stack)) | |
bb00edfa | 3430 | (save-stack 2) |
615bfe72 MV |
3431 | (scm-error 'signal |
3432 | #f | |
3433 | msg | |
3434 | #f | |
3435 | (list sig)))))) | |
3436 | (set! old-handlers | |
3437 | (map (lambda (sig-msg) | |
3438 | (sigaction (car sig-msg) | |
3439 | (make-handler (cdr sig-msg)))) | |
3440 | signals)))) | |
bbf5a913 | 3441 | |
615bfe72 MV |
3442 | ;; the protected thunk. |
3443 | (lambda () | |
3444 | (let ((status (scm-style-repl))) | |
3445 | (run-hook exit-hook) | |
3446 | status)) | |
bbf5a913 | 3447 | |
615bfe72 MV |
3448 | ;; call at exit. |
3449 | (lambda () | |
3450 | (map (lambda (sig-msg old-handler) | |
3451 | (if (not (car old-handler)) | |
3452 | ;; restore original C handler. | |
3453 | (sigaction (car sig-msg) #f) | |
3454 | ;; restore Scheme handler, SIG_IGN or SIG_DFL. | |
3455 | (sigaction (car sig-msg) | |
3456 | (car old-handler) | |
3457 | (cdr old-handler)))) | |
3458 | signals old-handlers)))))) | |
0f2d19dd | 3459 | |
2055a1bc MD |
3460 | ;;; This hook is run at the very end of an interactive session. |
3461 | ;;; | |
3e3cec45 | 3462 | (define exit-hook (make-hook)) |
2055a1bc | 3463 | |
4d31f0da | 3464 | \f |
3d2ada2f DH |
3465 | |
3466 | ;;; {Deprecated stuff} | |
3467 | ;;; | |
3468 | ||
3469 | (begin-deprecated | |
3470 | (define (feature? sym) | |
3471 | (issue-deprecation-warning | |
3472 | "`feature?' is deprecated. Use `provided?' instead.") | |
3473 | (provided? sym))) | |
3474 | ||
3475 | (begin-deprecated | |
3476 | (primitive-load-path "ice-9/deprecated.scm")) | |
3477 | ||
3478 | \f | |
3479 | ||
3480 | ;;; Place the user in the guile-user module. | |
3481 | ;;; | |
6eb396fe | 3482 | |
615bfe72 | 3483 | (define-module (guile-user)) |
6d36532c | 3484 | |
20edfbbd | 3485 | ;;; boot-9.scm ends here |