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22a52da1 | 1 | /* Copyright (C) 1995,1996,1997,1998,1999,2000,2001 Free Software Foundation, Inc. |
0f2d19dd JB |
2 | * |
3 | * This program is free software; you can redistribute it and/or modify | |
4 | * it under the terms of the GNU General Public License as published by | |
5 | * the Free Software Foundation; either version 2, or (at your option) | |
6 | * any later version. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this software; see the file COPYING. If not, write to | |
82892bed JB |
15 | * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, |
16 | * Boston, MA 02111-1307 USA | |
0f2d19dd JB |
17 | * |
18 | * As a special exception, the Free Software Foundation gives permission | |
19 | * for additional uses of the text contained in its release of GUILE. | |
20 | * | |
21 | * The exception is that, if you link the GUILE library with other files | |
22 | * to produce an executable, this does not by itself cause the | |
23 | * resulting executable to be covered by the GNU General Public License. | |
24 | * Your use of that executable is in no way restricted on account of | |
25 | * linking the GUILE library code into it. | |
26 | * | |
27 | * This exception does not however invalidate any other reasons why | |
28 | * the executable file might be covered by the GNU General Public License. | |
29 | * | |
30 | * This exception applies only to the code released by the | |
31 | * Free Software Foundation under the name GUILE. If you copy | |
32 | * code from other Free Software Foundation releases into a copy of | |
33 | * GUILE, as the General Public License permits, the exception does | |
34 | * not apply to the code that you add in this way. To avoid misleading | |
35 | * anyone as to the status of such modified files, you must delete | |
36 | * this exception notice from them. | |
37 | * | |
38 | * If you write modifications of your own for GUILE, it is your choice | |
39 | * whether to permit this exception to apply to your modifications. | |
82892bed | 40 | * If you do not wish that, delete this exception notice. */ |
1bbd0b84 | 41 | |
0f2d19dd JB |
42 | \f |
43 | ||
6dbd0af5 MD |
44 | /* This file is read twice in order to produce debugging versions of |
45 | * scm_ceval and scm_apply. These functions, scm_deval and | |
46 | * scm_dapply, are produced when we define the preprocessor macro | |
47 | * DEVAL. The file is divided into sections which are treated | |
48 | * differently with respect to DEVAL. The heads of these sections are | |
49 | * marked with the string "SECTION:". | |
50 | */ | |
51 | ||
6dbd0af5 | 52 | /* SECTION: This code is compiled once. |
0f2d19dd JB |
53 | */ |
54 | ||
55 | #ifndef DEVAL | |
56 | ||
d16332b3 | 57 | /* We need this to get the definitions for HAVE_ALLOCA_H, etc. */ |
a0599745 | 58 | #include "libguile/scmconfig.h" |
d16332b3 | 59 | |
48b96f4b JB |
60 | /* AIX requires this to be the first thing in the file. The #pragma |
61 | directive is indented so pre-ANSI compilers will ignore it, rather | |
62 | than choke on it. */ | |
5862b540 | 63 | #ifndef __GNUC__ |
48b96f4b JB |
64 | # if HAVE_ALLOCA_H |
65 | # include <alloca.h> | |
66 | # else | |
67 | # ifdef _AIX | |
ac13d9d2 | 68 | # pragma alloca |
48b96f4b JB |
69 | # else |
70 | # ifndef alloca /* predefined by HP cc +Olibcalls */ | |
71 | char *alloca (); | |
72 | # endif | |
73 | # endif | |
74 | # endif | |
75 | #endif | |
76 | ||
a0599745 MD |
77 | #include "libguile/_scm.h" |
78 | #include "libguile/debug.h" | |
09074dbf | 79 | #include "libguile/dynwind.h" |
a0599745 MD |
80 | #include "libguile/alist.h" |
81 | #include "libguile/eq.h" | |
82 | #include "libguile/continuations.h" | |
83 | #include "libguile/throw.h" | |
84 | #include "libguile/smob.h" | |
85 | #include "libguile/macros.h" | |
86 | #include "libguile/procprop.h" | |
87 | #include "libguile/hashtab.h" | |
88 | #include "libguile/hash.h" | |
89 | #include "libguile/srcprop.h" | |
90 | #include "libguile/stackchk.h" | |
91 | #include "libguile/objects.h" | |
92 | #include "libguile/async.h" | |
93 | #include "libguile/feature.h" | |
94 | #include "libguile/modules.h" | |
95 | #include "libguile/ports.h" | |
96 | #include "libguile/root.h" | |
97 | #include "libguile/vectors.h" | |
549e6ec6 | 98 | #include "libguile/fluids.h" |
a513ead3 | 99 | #include "libguile/values.h" |
a0599745 MD |
100 | |
101 | #include "libguile/validate.h" | |
102 | #include "libguile/eval.h" | |
89efbff4 | 103 | |
0f2d19dd JB |
104 | \f |
105 | ||
17fa3fcf DH |
106 | #define SCM_VALIDATE_NON_EMPTY_COMBINATION(x) \ |
107 | do { \ | |
108 | if (SCM_EQ_P ((x), SCM_EOL)) \ | |
109 | scm_misc_error (NULL, scm_s_expression, SCM_EOL); \ | |
110 | } while (0) | |
111 | ||
112 | \f | |
113 | ||
6dbd0af5 MD |
114 | /* The evaluator contains a plethora of EVAL symbols. |
115 | * This is an attempt at explanation. | |
116 | * | |
117 | * The following macros should be used in code which is read twice | |
118 | * (where the choice of evaluator is hard soldered): | |
119 | * | |
120 | * SCM_CEVAL is the symbol used within one evaluator to call itself. | |
121 | * Originally, it is defined to scm_ceval, but is redefined to | |
122 | * scm_deval during the second pass. | |
123 | * | |
124 | * SIDEVAL corresponds to SCM_CEVAL, but is used in situations where | |
125 | * only side effects of expressions matter. All immediates are | |
126 | * ignored. | |
127 | * | |
6cb702da | 128 | * SCM_EVALIM is used when it is known that the expression is an |
6dbd0af5 MD |
129 | * immediate. (This macro never calls an evaluator.) |
130 | * | |
131 | * EVALCAR evaluates the car of an expression. | |
132 | * | |
133 | * EVALCELLCAR is like EVALCAR, but is used when it is known that the | |
134 | * car is a lisp cell. | |
135 | * | |
136 | * The following macros should be used in code which is read once | |
137 | * (where the choice of evaluator is dynamic): | |
138 | * | |
6cb702da | 139 | * SCM_XEVAL takes care of immediates without calling an evaluator. It |
6dbd0af5 MD |
140 | * then calls scm_ceval *or* scm_deval, depending on the debugging |
141 | * mode. | |
142 | * | |
6cb702da | 143 | * SCM_XEVALCAR corresponds to EVALCAR, but uses scm_ceval *or* scm_deval |
6dbd0af5 MD |
144 | * depending on the debugging mode. |
145 | * | |
146 | * The main motivation for keeping this plethora is efficiency | |
147 | * together with maintainability (=> locality of code). | |
148 | */ | |
149 | ||
6cb702da | 150 | #define SCM_CEVAL scm_ceval |
7d2b68a8 | 151 | #define SIDEVAL(x, env) if (SCM_NIMP (x)) SCM_CEVAL((x), (env)) |
6cb702da | 152 | |
7d2b68a8 MD |
153 | #define EVALCELLCAR(x, env) (SCM_SYMBOLP (SCM_CAR (x)) \ |
154 | ? *scm_lookupcar (x, env, 1) \ | |
155 | : SCM_CEVAL (SCM_CAR (x), env)) | |
0f2d19dd | 156 | |
8c494e99 | 157 | #define EVALCAR(x, env) (SCM_IMP (SCM_CAR (x)) \ |
904a077d MV |
158 | ? SCM_EVALIM (SCM_CAR (x), env) \ |
159 | : EVALCELLCAR (x, env)) | |
0f2d19dd | 160 | |
e2806c10 | 161 | #define EXTEND_ENV SCM_EXTEND_ENV |
0f2d19dd JB |
162 | |
163 | #ifdef MEMOIZE_LOCALS | |
1cc91f1b | 164 | |
0f2d19dd | 165 | SCM * |
6e8d25a6 | 166 | scm_ilookup (SCM iloc, SCM env) |
0f2d19dd | 167 | { |
c014a02e | 168 | register long ir = SCM_IFRAME (iloc); |
0f2d19dd JB |
169 | register SCM er = env; |
170 | for (; 0 != ir; --ir) | |
171 | er = SCM_CDR (er); | |
172 | er = SCM_CAR (er); | |
173 | for (ir = SCM_IDIST (iloc); 0 != ir; --ir) | |
174 | er = SCM_CDR (er); | |
175 | if (SCM_ICDRP (iloc)) | |
a23afe53 MD |
176 | return SCM_CDRLOC (er); |
177 | return SCM_CARLOC (SCM_CDR (er)); | |
0f2d19dd JB |
178 | } |
179 | #endif | |
180 | ||
f8769b1d MV |
181 | #ifdef USE_THREADS |
182 | ||
183 | /* The Lookup Car Race | |
184 | - by Eva Luator | |
185 | ||
186 | Memoization of variables and special forms is done while executing | |
187 | the code for the first time. As long as there is only one thread | |
188 | everything is fine, but as soon as two threads execute the same | |
189 | code concurrently `for the first time' they can come into conflict. | |
190 | ||
191 | This memoization includes rewriting variable references into more | |
192 | efficient forms and expanding macros. Furthermore, macro expansion | |
193 | includes `compiling' special forms like `let', `cond', etc. into | |
194 | tree-code instructions. | |
195 | ||
196 | There shouldn't normally be a problem with memoizing local and | |
904a077d | 197 | global variable references (into ilocs and variables), because all |
f8769b1d MV |
198 | threads will mutate the code in *exactly* the same way and (if I |
199 | read the C code correctly) it is not possible to observe a half-way | |
200 | mutated cons cell. The lookup procedure can handle this | |
201 | transparently without any critical sections. | |
202 | ||
203 | It is different with macro expansion, because macro expansion | |
204 | happens outside of the lookup procedure and can't be | |
904a077d MV |
205 | undone. Therefore the lookup procedure can't cope with it. It has |
206 | to indicate failure when it detects a lost race and hope that the | |
207 | caller can handle it. Luckily, it turns out that this is the case. | |
f8769b1d | 208 | |
904a077d | 209 | An example to illustrate this: Suppose that the following form will |
f8769b1d MV |
210 | be memoized concurrently by two threads |
211 | ||
212 | (let ((x 12)) x) | |
213 | ||
214 | Let's first examine the lookup of X in the body. The first thread | |
215 | decides that it has to find the symbol "x" in the environment and | |
216 | starts to scan it. Then the other thread takes over and actually | |
217 | overtakes the first. It looks up "x" and substitutes an | |
218 | appropriate iloc for it. Now the first thread continues and | |
219 | completes its lookup. It comes to exactly the same conclusions as | |
220 | the second one and could - without much ado - just overwrite the | |
221 | iloc with the same iloc. | |
222 | ||
223 | But let's see what will happen when the race occurs while looking | |
224 | up the symbol "let" at the start of the form. It could happen that | |
225 | the second thread interrupts the lookup of the first thread and not | |
904a077d MV |
226 | only substitutes a variable for it but goes right ahead and |
227 | replaces it with the compiled form (#@let* (x 12) x). Now, when | |
228 | the first thread completes its lookup, it would replace the #@let* | |
229 | with a variable containing the "let" binding, effectively reverting | |
230 | the form to (let (x 12) x). This is wrong. It has to detect that | |
231 | it has lost the race and the evaluator has to reconsider the | |
232 | changed form completely. | |
f8769b1d MV |
233 | |
234 | This race condition could be resolved with some kind of traffic | |
235 | light (like mutexes) around scm_lookupcar, but I think that it is | |
236 | best to avoid them in this case. They would serialize memoization | |
237 | completely and because lookup involves calling arbitrary Scheme | |
238 | code (via the lookup-thunk), threads could be blocked for an | |
239 | arbitrary amount of time or even deadlock. But with the current | |
240 | solution a lot of unnecessary work is potentially done. */ | |
241 | ||
242 | /* SCM_LOOKUPCAR1 is was SCM_LOOKUPCAR used to be but is allowed to | |
243 | return NULL to indicate a failed lookup due to some race conditions | |
244 | between threads. This only happens when VLOC is the first cell of | |
245 | a special form that will eventually be memoized (like `let', etc.) | |
246 | In that case the whole lookup is bogus and the caller has to | |
247 | reconsider the complete special form. | |
248 | ||
249 | SCM_LOOKUPCAR is still there, of course. It just calls | |
250 | SCM_LOOKUPCAR1 and aborts on recieving NULL. So SCM_LOOKUPCAR | |
251 | should only be called when it is known that VLOC is not the first | |
252 | pair of a special form. Otherwise, use SCM_LOOKUPCAR1 and check | |
26d5b9b4 MD |
253 | for NULL. I think I've found the only places where this |
254 | applies. */ | |
f8769b1d MV |
255 | |
256 | #endif /* USE_THREADS */ | |
1cc91f1b | 257 | |
f25f761d GH |
258 | SCM_SYMBOL (scm_unbound_variable_key, "unbound-variable"); |
259 | ||
d0b7bad7 | 260 | #ifdef USE_THREADS |
8ecf1f13 | 261 | static SCM * |
26d5b9b4 | 262 | scm_lookupcar1 (SCM vloc, SCM genv, int check) |
d0b7bad7 MD |
263 | #else |
264 | SCM * | |
26d5b9b4 | 265 | scm_lookupcar (SCM vloc, SCM genv, int check) |
d0b7bad7 | 266 | #endif |
0f2d19dd JB |
267 | { |
268 | SCM env = genv; | |
e3173f93 | 269 | register SCM *al, fl, var = SCM_CAR (vloc); |
0f2d19dd JB |
270 | #ifdef MEMOIZE_LOCALS |
271 | register SCM iloc = SCM_ILOC00; | |
272 | #endif | |
273 | for (; SCM_NIMP (env); env = SCM_CDR (env)) | |
274 | { | |
790071cd | 275 | if (!SCM_CONSP (SCM_CAR (env))) |
0f2d19dd | 276 | break; |
a23afe53 | 277 | al = SCM_CARLOC (env); |
0f2d19dd JB |
278 | for (fl = SCM_CAR (*al); SCM_NIMP (fl); fl = SCM_CDR (fl)) |
279 | { | |
01f11e02 | 280 | if (!SCM_CONSP (fl)) |
33b97402 | 281 | { |
cf498326 | 282 | if (SCM_EQ_P (fl, var)) |
0f2d19dd JB |
283 | { |
284 | #ifdef MEMOIZE_LOCALS | |
f8769b1d | 285 | #ifdef USE_THREADS |
cf498326 | 286 | if (! SCM_EQ_P (SCM_CAR (vloc), var)) |
f8769b1d MV |
287 | goto race; |
288 | #endif | |
3201d763 | 289 | SCM_SET_CELL_WORD_0 (vloc, SCM_UNPACK (iloc) + SCM_ICDR); |
0f2d19dd | 290 | #endif |
a23afe53 | 291 | return SCM_CDRLOC (*al); |
0f2d19dd | 292 | } |
33b97402 MD |
293 | else |
294 | break; | |
295 | } | |
a23afe53 | 296 | al = SCM_CDRLOC (*al); |
cf498326 | 297 | if (SCM_EQ_P (SCM_CAR (fl), var)) |
0f2d19dd JB |
298 | { |
299 | #ifdef MEMOIZE_LOCALS | |
cf7c17e9 | 300 | #ifndef SCM_RECKLESS /* letrec inits to SCM_UNDEFINED */ |
0f2d19dd JB |
301 | if (SCM_UNBNDP (SCM_CAR (*al))) |
302 | { | |
303 | env = SCM_EOL; | |
304 | goto errout; | |
305 | } | |
f8769b1d MV |
306 | #endif |
307 | #ifdef USE_THREADS | |
c6772927 | 308 | if (!SCM_EQ_P (SCM_CAR (vloc), var)) |
f8769b1d | 309 | goto race; |
0f2d19dd | 310 | #endif |
a23afe53 | 311 | SCM_SETCAR (vloc, iloc); |
0f2d19dd | 312 | #endif |
a23afe53 | 313 | return SCM_CARLOC (*al); |
0f2d19dd JB |
314 | } |
315 | #ifdef MEMOIZE_LOCALS | |
3201d763 | 316 | iloc = SCM_PACK (SCM_UNPACK (iloc) + SCM_IDINC); |
0f2d19dd JB |
317 | #endif |
318 | } | |
319 | #ifdef MEMOIZE_LOCALS | |
3201d763 | 320 | iloc = SCM_PACK ((~SCM_IDSTMSK) & (SCM_UNPACK(iloc) + SCM_IFRINC)); |
0f2d19dd JB |
321 | #endif |
322 | } | |
323 | { | |
86d31dfe | 324 | SCM top_thunk, real_var; |
790071cd | 325 | if (SCM_NIMP (env)) |
0f2d19dd | 326 | { |
86d31dfe MV |
327 | top_thunk = SCM_CAR (env); /* env now refers to a |
328 | top level env thunk */ | |
0f2d19dd JB |
329 | env = SCM_CDR (env); |
330 | } | |
331 | else | |
332 | top_thunk = SCM_BOOL_F; | |
86d31dfe MV |
333 | real_var = scm_sym2var (var, top_thunk, SCM_BOOL_F); |
334 | if (SCM_FALSEP (real_var)) | |
0f2d19dd | 335 | goto errout; |
86d31dfe | 336 | |
cf7c17e9 | 337 | #ifndef SCM_RECKLESS |
01f11e02 | 338 | if (!SCM_NULLP (env) || SCM_UNBNDP (SCM_VARIABLE_REF (real_var))) |
86d31dfe MV |
339 | { |
340 | errout: | |
341 | /* scm_everr (vloc, genv,...) */ | |
342 | if (check) | |
343 | { | |
344 | if (SCM_NULLP (env)) | |
345 | scm_error (scm_unbound_variable_key, NULL, | |
346 | "Unbound variable: ~S", | |
8ea46249 | 347 | scm_list_1 (var), SCM_BOOL_F); |
86d31dfe MV |
348 | else |
349 | scm_misc_error (NULL, "Damaged environment: ~S", | |
8ea46249 | 350 | scm_list_1 (var)); |
86d31dfe MV |
351 | } |
352 | else | |
353 | { | |
354 | /* A variable could not be found, but we shall | |
355 | not throw an error. */ | |
356 | static SCM undef_object = SCM_UNDEFINED; | |
357 | return &undef_object; | |
358 | } | |
09e4d064 | 359 | } |
0f2d19dd | 360 | #endif |
86d31dfe | 361 | |
f8769b1d | 362 | #ifdef USE_THREADS |
c6772927 | 363 | if (!SCM_EQ_P (SCM_CAR (vloc), var)) |
86d31dfe MV |
364 | { |
365 | /* Some other thread has changed the very cell we are working | |
366 | on. In effect, it must have done our job or messed it up | |
367 | completely. */ | |
368 | race: | |
369 | var = SCM_CAR (vloc); | |
d22a0ea1 MV |
370 | if (SCM_VARIABLEP (var)) |
371 | return SCM_VARIABLE_LOC (var); | |
f8769b1d | 372 | #ifdef MEMOIZE_LOCALS |
86d31dfe MV |
373 | if (SCM_ITAG7 (var) == SCM_ITAG7 (SCM_ILOC00)) |
374 | return scm_ilookup (var, genv); | |
f8769b1d | 375 | #endif |
904a077d | 376 | /* We can't cope with anything else than variables and ilocs. When |
86d31dfe MV |
377 | a special form has been memoized (i.e. `let' into `#@let') we |
378 | return NULL and expect the calling function to do the right | |
379 | thing. For the evaluator, this means going back and redoing | |
380 | the dispatch on the car of the form. */ | |
381 | return NULL; | |
382 | } | |
f8769b1d MV |
383 | #endif /* USE_THREADS */ |
384 | ||
d22a0ea1 | 385 | SCM_SETCAR (vloc, real_var); |
86d31dfe MV |
386 | return SCM_VARIABLE_LOC (real_var); |
387 | } | |
0f2d19dd JB |
388 | } |
389 | ||
f8769b1d MV |
390 | #ifdef USE_THREADS |
391 | SCM * | |
6e8d25a6 | 392 | scm_lookupcar (SCM vloc, SCM genv, int check) |
f8769b1d | 393 | { |
26d5b9b4 | 394 | SCM *loc = scm_lookupcar1 (vloc, genv, check); |
f8769b1d MV |
395 | if (loc == NULL) |
396 | abort (); | |
397 | return loc; | |
398 | } | |
f8769b1d MV |
399 | #endif |
400 | ||
0f2d19dd | 401 | #define unmemocar scm_unmemocar |
1cc91f1b | 402 | |
86d31dfe MV |
403 | SCM_SYMBOL (sym_three_question_marks, "???"); |
404 | ||
0f2d19dd | 405 | SCM |
6e8d25a6 | 406 | scm_unmemocar (SCM form, SCM env) |
0f2d19dd | 407 | { |
302c12b4 | 408 | if (!SCM_CONSP (form)) |
0f2d19dd | 409 | return form; |
302c12b4 | 410 | else |
d22a0ea1 | 411 | { |
302c12b4 DH |
412 | SCM c = SCM_CAR (form); |
413 | if (SCM_VARIABLEP (c)) | |
414 | { | |
415 | SCM sym = scm_module_reverse_lookup (scm_env_module (env), c); | |
416 | if (SCM_FALSEP (sym)) | |
417 | sym = sym_three_question_marks; | |
418 | SCM_SETCAR (form, sym); | |
419 | } | |
0f2d19dd | 420 | #ifdef MEMOIZE_LOCALS |
302c12b4 DH |
421 | else if (SCM_ILOCP (c)) |
422 | { | |
423 | unsigned long int ir; | |
424 | ||
425 | for (ir = SCM_IFRAME (c); ir != 0; --ir) | |
426 | env = SCM_CDR (env); | |
427 | env = SCM_CAAR (env); | |
428 | for (ir = SCM_IDIST (c); ir != 0; --ir) | |
429 | env = SCM_CDR (env); | |
430 | SCM_SETCAR (form, SCM_ICDRP (c) ? env : SCM_CAR (env)); | |
431 | } | |
0f2d19dd | 432 | #endif |
302c12b4 DH |
433 | return form; |
434 | } | |
0f2d19dd JB |
435 | } |
436 | ||
1cc91f1b | 437 | |
0f2d19dd | 438 | SCM |
6e8d25a6 | 439 | scm_eval_car (SCM pair, SCM env) |
0f2d19dd | 440 | { |
6cb702da | 441 | return SCM_XEVALCAR (pair, env); |
0f2d19dd JB |
442 | } |
443 | ||
444 | \f | |
445 | /* | |
446 | * The following rewrite expressions and | |
447 | * some memoized forms have different syntax | |
448 | */ | |
449 | ||
3eeba8d4 JB |
450 | const char scm_s_expression[] = "missing or extra expression"; |
451 | const char scm_s_test[] = "bad test"; | |
452 | const char scm_s_body[] = "bad body"; | |
453 | const char scm_s_bindings[] = "bad bindings"; | |
185ab0ef | 454 | const char scm_s_duplicate_bindings[] = "duplicate bindings"; |
3eeba8d4 JB |
455 | const char scm_s_variable[] = "bad variable"; |
456 | const char scm_s_clauses[] = "bad or missing clauses"; | |
457 | const char scm_s_formals[] = "bad formals"; | |
5280aaca | 458 | const char scm_s_duplicate_formals[] = "duplicate formals"; |
302c12b4 | 459 | static const char s_splicing[] = "bad (non-list) result for unquote-splicing"; |
0f2d19dd | 460 | |
85db4a2c DH |
461 | SCM_GLOBAL_SYMBOL (scm_sym_dot, "."); |
462 | SCM_GLOBAL_SYMBOL (scm_sym_arrow, "=>"); | |
463 | SCM_GLOBAL_SYMBOL (scm_sym_else, "else"); | |
464 | SCM_GLOBAL_SYMBOL (scm_sym_unquote, "unquote"); | |
465 | SCM_GLOBAL_SYMBOL (scm_sym_uq_splicing, "unquote-splicing"); | |
81123e6d MD |
466 | |
467 | SCM scm_f_apply; | |
b8229a3b | 468 | |
6dbd0af5 | 469 | #ifdef DEBUG_EXTENSIONS |
85db4a2c DH |
470 | SCM_GLOBAL_SYMBOL (scm_sym_enter_frame, "enter-frame"); |
471 | SCM_GLOBAL_SYMBOL (scm_sym_apply_frame, "apply-frame"); | |
472 | SCM_GLOBAL_SYMBOL (scm_sym_exit_frame, "exit-frame"); | |
473 | SCM_GLOBAL_SYMBOL (scm_sym_trace, "trace"); | |
6dbd0af5 | 474 | #endif |
0f2d19dd | 475 | |
0f2d19dd | 476 | |
26d5b9b4 MD |
477 | /* Check that the body denoted by XORIG is valid and rewrite it into |
478 | its internal form. The internal form of a body is just the body | |
479 | itself, but prefixed with an ISYM that denotes to what kind of | |
480 | outer construct this body belongs. A lambda body starts with | |
481 | SCM_IM_LAMBDA, for example, a body of a let starts with SCM_IM_LET, | |
482 | etc. The one exception is a body that belongs to a letrec that has | |
483 | been formed by rewriting internal defines: it starts with | |
484 | SCM_IM_DEFINE. */ | |
485 | ||
486 | /* XXX - Besides controlling the rewriting of internal defines, the | |
487 | additional ISYM could be used for improved error messages. | |
488 | This is not done yet. */ | |
489 | ||
490 | static SCM | |
6e8d25a6 | 491 | scm_m_body (SCM op, SCM xorig, const char *what) |
26d5b9b4 | 492 | { |
302c12b4 | 493 | SCM_ASSYNT (scm_ilength (xorig) >= 1, scm_s_body, what); |
26d5b9b4 MD |
494 | |
495 | /* Don't add another ISYM if one is present already. */ | |
496 | if (SCM_ISYMP (SCM_CAR (xorig))) | |
497 | return xorig; | |
498 | ||
499 | /* Retain possible doc string. */ | |
44d3cb0d | 500 | if (!SCM_CONSP (SCM_CAR (xorig))) |
26d5b9b4 | 501 | { |
8ea46249 | 502 | if (!SCM_NULLP (SCM_CDR (xorig))) |
26d5b9b4 | 503 | return scm_cons (SCM_CAR (xorig), |
8ea46249 | 504 | scm_m_body (op, SCM_CDR (xorig), what)); |
26d5b9b4 MD |
505 | return xorig; |
506 | } | |
507 | ||
ab66ae47 | 508 | return scm_cons (op, xorig); |
26d5b9b4 MD |
509 | } |
510 | ||
1cc91f1b | 511 | |
8ea46249 DH |
512 | SCM_SYNTAX (s_quote, "quote", scm_makmmacro, scm_m_quote); |
513 | SCM_GLOBAL_SYMBOL (scm_sym_quote, s_quote); | |
514 | ||
515 | SCM | |
e81d98ec | 516 | scm_m_quote (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 517 | { |
160bb34a | 518 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, scm_s_expression, s_quote); |
302c12b4 | 519 | return scm_cons (SCM_IM_QUOTE, SCM_CDR (xorig)); |
0f2d19dd JB |
520 | } |
521 | ||
522 | ||
8ea46249 DH |
523 | SCM_SYNTAX (s_begin, "begin", scm_makmmacro, scm_m_begin); |
524 | SCM_GLOBAL_SYMBOL (scm_sym_begin, s_begin); | |
1cc91f1b | 525 | |
8ea46249 | 526 | SCM |
e81d98ec | 527 | scm_m_begin (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 528 | { |
b8113bc8 | 529 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) >= 0, scm_s_expression, s_begin); |
3a3111a8 | 530 | return scm_cons (SCM_IM_BEGIN, SCM_CDR (xorig)); |
0f2d19dd JB |
531 | } |
532 | ||
1cc91f1b | 533 | |
8ea46249 DH |
534 | SCM_SYNTAX (s_if, "if", scm_makmmacro, scm_m_if); |
535 | SCM_GLOBAL_SYMBOL (scm_sym_if, s_if); | |
536 | ||
537 | SCM | |
e81d98ec | 538 | scm_m_if (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 539 | { |
c014a02e | 540 | long len = scm_ilength (SCM_CDR (xorig)); |
160bb34a | 541 | SCM_ASSYNT (len >= 2 && len <= 3, scm_s_expression, "if"); |
3a3111a8 | 542 | return scm_cons (SCM_IM_IF, SCM_CDR (xorig)); |
0f2d19dd JB |
543 | } |
544 | ||
545 | ||
89efbff4 | 546 | /* Will go into the RnRS module when Guile is factorized. |
8ea46249 | 547 | SCM_SYNTAX (scm_s_set_x,"set!", scm_makmmacro, scm_m_set_x); */ |
89efbff4 | 548 | const char scm_s_set_x[] = "set!"; |
8ea46249 | 549 | SCM_GLOBAL_SYMBOL (scm_sym_set_x, scm_s_set_x); |
1cc91f1b | 550 | |
8ea46249 | 551 | SCM |
e81d98ec | 552 | scm_m_set_x (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 553 | { |
6dbd0af5 | 554 | SCM x = SCM_CDR (xorig); |
8ea46249 | 555 | SCM_ASSYNT (scm_ilength (x) == 2, scm_s_expression, scm_s_set_x); |
160bb34a | 556 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (x)), scm_s_variable, scm_s_set_x); |
3a3111a8 | 557 | return scm_cons (SCM_IM_SET_X, x); |
0f2d19dd JB |
558 | } |
559 | ||
560 | ||
8ea46249 DH |
561 | SCM_SYNTAX (s_and, "and", scm_makmmacro, scm_m_and); |
562 | SCM_GLOBAL_SYMBOL (scm_sym_and, s_and); | |
1cc91f1b | 563 | |
8ea46249 | 564 | SCM |
e81d98ec | 565 | scm_m_and (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 566 | { |
c014a02e | 567 | long len = scm_ilength (SCM_CDR (xorig)); |
160bb34a | 568 | SCM_ASSYNT (len >= 0, scm_s_test, s_and); |
0f2d19dd | 569 | if (len >= 1) |
3a3111a8 | 570 | return scm_cons (SCM_IM_AND, SCM_CDR (xorig)); |
0f2d19dd JB |
571 | else |
572 | return SCM_BOOL_T; | |
573 | } | |
574 | ||
1cc91f1b | 575 | |
8ea46249 DH |
576 | SCM_SYNTAX (s_or, "or", scm_makmmacro, scm_m_or); |
577 | SCM_GLOBAL_SYMBOL (scm_sym_or, s_or); | |
578 | ||
579 | SCM | |
e81d98ec | 580 | scm_m_or (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 581 | { |
c014a02e | 582 | long len = scm_ilength (SCM_CDR (xorig)); |
160bb34a | 583 | SCM_ASSYNT (len >= 0, scm_s_test, s_or); |
0f2d19dd | 584 | if (len >= 1) |
3a3111a8 | 585 | return scm_cons (SCM_IM_OR, SCM_CDR (xorig)); |
0f2d19dd JB |
586 | else |
587 | return SCM_BOOL_F; | |
588 | } | |
589 | ||
590 | ||
8ea46249 DH |
591 | SCM_SYNTAX (s_case, "case", scm_makmmacro, scm_m_case); |
592 | SCM_GLOBAL_SYMBOL (scm_sym_case, s_case); | |
1cc91f1b | 593 | |
8ea46249 | 594 | SCM |
e81d98ec | 595 | scm_m_case (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 596 | { |
8ea46249 DH |
597 | SCM clauses; |
598 | SCM cdrx = SCM_CDR (xorig); | |
599 | SCM_ASSYNT (scm_ilength (cdrx) >= 2, scm_s_clauses, s_case); | |
600 | clauses = SCM_CDR (cdrx); | |
601 | while (!SCM_NULLP (clauses)) | |
0f2d19dd | 602 | { |
8ea46249 DH |
603 | SCM clause = SCM_CAR (clauses); |
604 | SCM_ASSYNT (scm_ilength (clause) >= 2, scm_s_clauses, s_case); | |
605 | SCM_ASSYNT (scm_ilength (SCM_CAR (clause)) >= 0 | |
606 | || (SCM_EQ_P (scm_sym_else, SCM_CAR (clause)) | |
607 | && SCM_NULLP (SCM_CDR (clauses))), | |
160bb34a | 608 | scm_s_clauses, s_case); |
8ea46249 | 609 | clauses = SCM_CDR (clauses); |
0f2d19dd | 610 | } |
3a3111a8 | 611 | return scm_cons (SCM_IM_CASE, cdrx); |
0f2d19dd JB |
612 | } |
613 | ||
614 | ||
8ea46249 DH |
615 | SCM_SYNTAX (s_cond, "cond", scm_makmmacro, scm_m_cond); |
616 | SCM_GLOBAL_SYMBOL (scm_sym_cond, s_cond); | |
1cc91f1b | 617 | |
8ea46249 | 618 | SCM |
e81d98ec | 619 | scm_m_cond (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 620 | { |
8ea46249 DH |
621 | SCM cdrx = SCM_CDR (xorig); |
622 | SCM clauses = cdrx; | |
623 | SCM_ASSYNT (scm_ilength (clauses) >= 1, scm_s_clauses, s_cond); | |
624 | while (!SCM_NULLP (clauses)) | |
0f2d19dd | 625 | { |
8ea46249 DH |
626 | SCM clause = SCM_CAR (clauses); |
627 | long len = scm_ilength (clause); | |
160bb34a | 628 | SCM_ASSYNT (len >= 1, scm_s_clauses, s_cond); |
8ea46249 | 629 | if (SCM_EQ_P (scm_sym_else, SCM_CAR (clause))) |
0f2d19dd | 630 | { |
8ea46249 DH |
631 | int last_clause_p = SCM_NULLP (SCM_CDR (clauses)); |
632 | SCM_ASSYNT (len >= 2 && last_clause_p, "bad ELSE clause", s_cond); | |
0f2d19dd | 633 | } |
8ea46249 DH |
634 | else if (len >= 2 && SCM_EQ_P (scm_sym_arrow, SCM_CADR (clause))) |
635 | { | |
636 | SCM_ASSYNT (len > 2, "missing recipient", s_cond); | |
637 | SCM_ASSYNT (len == 3, "bad recipient", s_cond); | |
638 | } | |
639 | clauses = SCM_CDR (clauses); | |
0f2d19dd | 640 | } |
3a3111a8 | 641 | return scm_cons (SCM_IM_COND, cdrx); |
0f2d19dd JB |
642 | } |
643 | ||
1cc91f1b | 644 | |
8ea46249 DH |
645 | SCM_SYNTAX (s_lambda, "lambda", scm_makmmacro, scm_m_lambda); |
646 | SCM_GLOBAL_SYMBOL (scm_sym_lambda, s_lambda); | |
5280aaca | 647 | |
8ea46249 DH |
648 | /* Return true if OBJ is `eq?' to one of the elements of LIST or to the |
649 | * cdr of the last cons. (Thus, LIST is not required to be a proper | |
650 | * list and OBJ can also be found in the improper ending.) */ | |
5280aaca MV |
651 | static int |
652 | scm_c_improper_memq (SCM obj, SCM list) | |
653 | { | |
654 | for (; SCM_CONSP (list); list = SCM_CDR (list)) | |
655 | { | |
656 | if (SCM_EQ_P (SCM_CAR (list), obj)) | |
c6772927 | 657 | return 1; |
5280aaca MV |
658 | } |
659 | return SCM_EQ_P (list, obj); | |
660 | } | |
661 | ||
8ea46249 | 662 | SCM |
e81d98ec | 663 | scm_m_lambda (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 664 | { |
8ea46249 DH |
665 | SCM formals; |
666 | SCM x = SCM_CDR (xorig); | |
302c12b4 DH |
667 | |
668 | SCM_ASSYNT (SCM_CONSP (x), scm_s_formals, s_lambda); | |
8ea46249 DH |
669 | |
670 | formals = SCM_CAR (x); | |
671 | while (SCM_CONSP (formals)) | |
0f2d19dd | 672 | { |
8ea46249 DH |
673 | SCM formal = SCM_CAR (formals); |
674 | SCM_ASSYNT (SCM_SYMBOLP (formal), scm_s_formals, s_lambda); | |
675 | if (scm_c_improper_memq (formal, SCM_CDR (formals))) | |
db4b4ca6 | 676 | scm_misc_error (s_lambda, scm_s_duplicate_formals, SCM_EOL); |
8ea46249 | 677 | formals = SCM_CDR (formals); |
26d5b9b4 | 678 | } |
8ea46249 DH |
679 | if (!SCM_NULLP (formals) && !SCM_SYMBOLP (formals)) |
680 | scm_misc_error (s_lambda, scm_s_formals, SCM_EOL); | |
26d5b9b4 | 681 | |
3a3111a8 MD |
682 | return scm_cons2 (SCM_IM_LAMBDA, SCM_CAR (x), |
683 | scm_m_body (SCM_IM_LAMBDA, SCM_CDR (x), s_lambda)); | |
0f2d19dd JB |
684 | } |
685 | ||
686 | ||
8ea46249 DH |
687 | SCM_SYNTAX (s_letstar, "let*", scm_makmmacro, scm_m_letstar); |
688 | SCM_GLOBAL_SYMBOL (scm_sym_letstar, s_letstar); | |
1cc91f1b | 689 | |
8ea46249 DH |
690 | /* (let* ((v1 i1) (v2 i2) ...) body) with variables v1 .. vk and initializers |
691 | * i1 .. ik is transformed into the form (#@let* (v1 i1 v2 i2 ...) body*). */ | |
692 | SCM | |
e81d98ec | 693 | scm_m_letstar (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 694 | { |
8ea46249 DH |
695 | SCM bindings; |
696 | SCM x = SCM_CDR (xorig); | |
697 | SCM vars = SCM_EOL; | |
698 | SCM *varloc = &vars; | |
302c12b4 DH |
699 | |
700 | SCM_ASSYNT (SCM_CONSP (x), scm_s_bindings, s_letstar); | |
701 | ||
8ea46249 DH |
702 | bindings = SCM_CAR (x); |
703 | SCM_ASSYNT (scm_ilength (bindings) >= 0, scm_s_bindings, s_letstar); | |
704 | while (!SCM_NULLP (bindings)) | |
0f2d19dd | 705 | { |
8ea46249 DH |
706 | SCM binding = SCM_CAR (bindings); |
707 | SCM_ASSYNT (scm_ilength (binding) == 2, scm_s_bindings, s_letstar); | |
708 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (binding)), scm_s_variable, s_letstar); | |
709 | *varloc = scm_list_2 (SCM_CAR (binding), SCM_CADR (binding)); | |
a23afe53 | 710 | varloc = SCM_CDRLOC (SCM_CDR (*varloc)); |
8ea46249 | 711 | bindings = SCM_CDR (bindings); |
0f2d19dd | 712 | } |
302c12b4 | 713 | |
8ea46249 | 714 | return scm_cons2 (SCM_IM_LETSTAR, vars, |
3a3111a8 | 715 | scm_m_body (SCM_IM_LETSTAR, SCM_CDR (x), s_letstar)); |
0f2d19dd JB |
716 | } |
717 | ||
8ea46249 | 718 | |
302c12b4 DH |
719 | /* DO gets the most radically altered syntax. The order of the vars is |
720 | * reversed here. In contrast, the order of the inits and steps is reversed | |
721 | * during the evaluation: | |
722 | ||
0f2d19dd JB |
723 | (do ((<var1> <init1> <step1>) |
724 | (<var2> <init2>) | |
725 | ... ) | |
726 | (<test> <return>) | |
727 | <body>) | |
302c12b4 | 728 | |
0f2d19dd | 729 | ;; becomes |
302c12b4 DH |
730 | |
731 | (#@do (varn ... var2 var1) | |
0f2d19dd JB |
732 | (<init1> <init2> ... <initn>) |
733 | (<test> <return>) | |
734 | (<body>) | |
735 | <step1> <step2> ... <stepn>) ;; missing steps replaced by var | |
302c12b4 | 736 | */ |
0f2d19dd | 737 | |
b8229a3b | 738 | SCM_SYNTAX(s_do, "do", scm_makmmacro, scm_m_do); |
2f0d1375 | 739 | SCM_GLOBAL_SYMBOL(scm_sym_do, s_do); |
1cc91f1b | 740 | |
0f2d19dd | 741 | SCM |
e81d98ec | 742 | scm_m_do (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 743 | { |
8ea46249 DH |
744 | SCM bindings; |
745 | SCM x = SCM_CDR (xorig); | |
746 | SCM vars = SCM_EOL; | |
747 | SCM inits = SCM_EOL; | |
748 | SCM *initloc = &inits; | |
749 | SCM steps = SCM_EOL; | |
750 | SCM *steploc = &steps; | |
751 | SCM_ASSYNT (scm_ilength (x) >= 2, scm_s_test, "do"); | |
752 | bindings = SCM_CAR (x); | |
753 | SCM_ASSYNT (scm_ilength (bindings) >= 0, scm_s_bindings, "do"); | |
754 | while (!SCM_NULLP (bindings)) | |
0f2d19dd | 755 | { |
302c12b4 DH |
756 | SCM binding = SCM_CAR (bindings); |
757 | long len = scm_ilength (binding); | |
8ea46249 | 758 | SCM_ASSYNT (len == 2 || len == 3, scm_s_bindings, "do"); |
302c12b4 DH |
759 | { |
760 | SCM name = SCM_CAR (binding); | |
761 | SCM init = SCM_CADR (binding); | |
762 | SCM step = (len == 2) ? name : SCM_CADDR (binding); | |
763 | SCM_ASSYNT (SCM_SYMBOLP (name), scm_s_variable, "do"); | |
764 | vars = scm_cons (name, vars); | |
765 | *initloc = scm_list_1 (init); | |
766 | initloc = SCM_CDRLOC (*initloc); | |
767 | *steploc = scm_list_1 (step); | |
768 | steploc = SCM_CDRLOC (*steploc); | |
769 | bindings = SCM_CDR (bindings); | |
770 | } | |
0f2d19dd JB |
771 | } |
772 | x = SCM_CDR (x); | |
160bb34a | 773 | SCM_ASSYNT (scm_ilength (SCM_CAR (x)) >= 1, scm_s_test, "do"); |
0f2d19dd JB |
774 | x = scm_cons2 (SCM_CAR (x), SCM_CDR (x), steps); |
775 | x = scm_cons2 (vars, inits, x); | |
3a3111a8 | 776 | return scm_cons (SCM_IM_DO, x); |
0f2d19dd JB |
777 | } |
778 | ||
b8229a3b | 779 | |
302c12b4 DH |
780 | SCM_SYNTAX (s_quasiquote, "quasiquote", scm_makacro, scm_m_quasiquote); |
781 | SCM_GLOBAL_SYMBOL (scm_sym_quasiquote, s_quasiquote); | |
b8229a3b | 782 | |
302c12b4 DH |
783 | /* Internal function to handle a quasiquotation: 'form' is the parameter in |
784 | * the call (quasiquotation form), 'env' is the environment where unquoted | |
785 | * expressions will be evaluated, and 'depth' is the current quasiquotation | |
786 | * nesting level and is known to be greater than zero. */ | |
0f2d19dd | 787 | static SCM |
302c12b4 | 788 | iqq (SCM form, SCM env, unsigned long int depth) |
0f2d19dd | 789 | { |
302c12b4 DH |
790 | if (SCM_CONSP (form)) |
791 | { | |
792 | SCM tmp = SCM_CAR (form); | |
793 | if (SCM_EQ_P (tmp, scm_sym_quasiquote)) | |
794 | { | |
795 | SCM args = SCM_CDR (form); | |
796 | SCM_ASSYNT (scm_ilength (args) == 1, scm_s_expression, s_quasiquote); | |
797 | return scm_list_2 (tmp, iqq (SCM_CAR (args), env, depth + 1)); | |
798 | } | |
799 | else if (SCM_EQ_P (tmp, scm_sym_unquote)) | |
800 | { | |
801 | SCM args = SCM_CDR (form); | |
802 | SCM_ASSYNT (scm_ilength (args) == 1, scm_s_expression, s_quasiquote); | |
803 | if (depth - 1 == 0) | |
804 | return scm_eval_car (args, env); | |
805 | else | |
806 | return scm_list_2 (tmp, iqq (SCM_CAR (args), env, depth - 1)); | |
807 | } | |
808 | else if (SCM_CONSP (tmp) | |
809 | && SCM_EQ_P (SCM_CAR (tmp), scm_sym_uq_splicing)) | |
810 | { | |
811 | SCM args = SCM_CDR (tmp); | |
812 | SCM_ASSYNT (scm_ilength (args) == 1, scm_s_expression, s_quasiquote); | |
813 | if (depth - 1 == 0) | |
814 | { | |
815 | SCM list = scm_eval_car (args, env); | |
816 | SCM rest = SCM_CDR (form); | |
817 | SCM_ASSYNT (scm_ilength (list) >= 0, s_splicing, s_quasiquote); | |
818 | return scm_append (scm_list_2 (list, iqq (rest, env, depth))); | |
819 | } | |
820 | else | |
821 | return scm_cons (iqq (SCM_CAR (form), env, depth - 1), | |
822 | iqq (SCM_CDR (form), env, depth)); | |
823 | } | |
824 | else | |
825 | return scm_cons (iqq (SCM_CAR (form), env, depth), | |
826 | iqq (SCM_CDR (form), env, depth)); | |
827 | } | |
828 | else if (SCM_VECTORP (form)) | |
0f2d19dd | 829 | { |
302c12b4 | 830 | size_t i = SCM_VECTOR_LENGTH (form); |
0f2d19dd | 831 | SCM *data = SCM_VELTS (form); |
302c12b4 DH |
832 | SCM tmp = SCM_EOL; |
833 | while (i != 0) | |
834 | tmp = scm_cons (data[--i], tmp); | |
835 | scm_remember_upto_here_1 (form); | |
0f2d19dd JB |
836 | return scm_vector (iqq (tmp, env, depth)); |
837 | } | |
302c12b4 | 838 | else |
ff467021 | 839 | return form; |
0f2d19dd JB |
840 | } |
841 | ||
302c12b4 DH |
842 | SCM |
843 | scm_m_quasiquote (SCM xorig, SCM env) | |
844 | { | |
845 | SCM x = SCM_CDR (xorig); | |
846 | SCM_ASSYNT (scm_ilength (x) == 1, scm_s_expression, s_quasiquote); | |
847 | return iqq (SCM_CAR (x), env, 1); | |
848 | } | |
849 | ||
0f2d19dd | 850 | |
a570e93a MD |
851 | SCM_SYNTAX (s_delay, "delay", scm_makmmacro, scm_m_delay); |
852 | SCM_GLOBAL_SYMBOL (scm_sym_delay, s_delay); | |
1cc91f1b | 853 | |
302c12b4 DH |
854 | /* Promises are implemented as closures with an empty parameter list. Thus, |
855 | * (delay <expression>) is transformed into (#@delay '() <expression>), where | |
856 | * the empty list represents the empty parameter list. This representation | |
857 | * allows for easy creation of the closure during evaluation. */ | |
858 | SCM | |
e81d98ec | 859 | scm_m_delay (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 860 | { |
160bb34a | 861 | SCM_ASSYNT (scm_ilength (xorig) == 2, scm_s_expression, s_delay); |
a570e93a | 862 | return scm_cons2 (SCM_IM_DELAY, SCM_EOL, SCM_CDR (xorig)); |
0f2d19dd JB |
863 | } |
864 | ||
1cc91f1b | 865 | |
b8229a3b | 866 | SCM_SYNTAX(s_define, "define", scm_makmmacro, scm_m_define); |
2f0d1375 | 867 | SCM_GLOBAL_SYMBOL(scm_sym_define, s_define); |
1cc91f1b | 868 | |
302c12b4 DH |
869 | /* Guile provides an extension to R5RS' define syntax to represent function |
870 | * currying in a compact way. With this extension, it is allowed to write | |
871 | * (define <nested-variable> <body>), where <nested-variable> has of one of | |
872 | * the forms (<nested-variable> <formals>), (<nested-variable> . <formal>), | |
873 | * (<variable> <formals>) or (<variable> . <formal>). As in R5RS, <formals> | |
874 | * should be either a sequence of zero or more variables, or a sequence of one | |
875 | * or more variables followed by a space-delimited period and another | |
876 | * variable. Each level of argument nesting wraps the <body> within another | |
877 | * lambda expression. For example, the following forms are allowed, each one | |
878 | * followed by an equivalent, more explicit implementation. | |
879 | * Example 1: | |
880 | * (define ((a b . c) . d) <body>) is equivalent to | |
881 | * (define a (lambda (b . c) (lambda d <body>))) | |
882 | * Example 2: | |
883 | * (define (((a) b) c . d) <body>) is equivalent to | |
884 | * (define a (lambda () (lambda (b) (lambda (c . d) <body>)))) | |
885 | */ | |
886 | /* Dirk:FIXME:: We should provide an implementation for 'define' in the R5RS | |
887 | * module that does not implement this extension. */ | |
888 | SCM | |
6e8d25a6 | 889 | scm_m_define (SCM x, SCM env) |
0f2d19dd | 890 | { |
302c12b4 | 891 | SCM name; |
0f2d19dd | 892 | x = SCM_CDR (x); |
160bb34a | 893 | SCM_ASSYNT (scm_ilength (x) >= 2, scm_s_expression, s_define); |
302c12b4 | 894 | name = SCM_CAR (x); |
0f2d19dd | 895 | x = SCM_CDR (x); |
302c12b4 DH |
896 | while (SCM_CONSP (name)) |
897 | { | |
898 | /* This while loop realizes function currying by variable nesting. */ | |
899 | SCM formals = SCM_CDR (name); | |
900 | x = scm_list_1 (scm_cons2 (scm_sym_lambda, formals, x)); | |
901 | name = SCM_CAR (name); | |
0f2d19dd | 902 | } |
302c12b4 DH |
903 | SCM_ASSYNT (SCM_SYMBOLP (name), scm_s_variable, s_define); |
904 | SCM_ASSYNT (scm_ilength (x) == 1, scm_s_expression, s_define); | |
0f2d19dd JB |
905 | if (SCM_TOP_LEVEL (env)) |
906 | { | |
302c12b4 DH |
907 | SCM var; |
908 | x = scm_eval_car (x, env); | |
909 | if (SCM_REC_PROCNAMES_P) | |
80ea260c | 910 | { |
302c12b4 DH |
911 | SCM tmp = x; |
912 | while (SCM_MACROP (tmp)) | |
913 | tmp = SCM_MACRO_CODE (tmp); | |
914 | if (SCM_CLOSUREP (tmp) | |
80ea260c | 915 | /* Only the first definition determines the name. */ |
302c12b4 DH |
916 | && SCM_FALSEP (scm_procedure_property (tmp, scm_sym_name))) |
917 | scm_set_procedure_property_x (tmp, scm_sym_name, name); | |
80ea260c | 918 | } |
302c12b4 DH |
919 | var = scm_sym2var (name, scm_env_top_level (env), SCM_BOOL_T); |
920 | SCM_VARIABLE_SET (var, x); | |
0f2d19dd | 921 | return SCM_UNSPECIFIED; |
0f2d19dd | 922 | } |
302c12b4 DH |
923 | else |
924 | return scm_cons2 (SCM_IM_DEFINE, name, x); | |
0f2d19dd | 925 | } |
6dbd0af5 | 926 | |
0f2d19dd | 927 | |
302c12b4 DH |
928 | /* The bindings ((v1 i1) (v2 i2) ... (vn in)) are transformed to the lists |
929 | * (vn ... v2 v1) and (i1 i2 ... in). That is, the list of variables is | |
930 | * reversed here, the list of inits gets reversed during evaluation. */ | |
931 | static void | |
932 | transform_bindings (SCM bindings, SCM *rvarloc, SCM *initloc, const char *what) | |
0f2d19dd | 933 | { |
302c12b4 DH |
934 | SCM rvars = SCM_EOL; |
935 | *rvarloc = SCM_EOL; | |
936 | *initloc = SCM_EOL; | |
937 | ||
938 | SCM_ASSYNT (scm_ilength (bindings) >= 1, scm_s_bindings, what); | |
0f2d19dd | 939 | |
0f2d19dd JB |
940 | do |
941 | { | |
302c12b4 DH |
942 | SCM binding = SCM_CAR (bindings); |
943 | SCM_ASSYNT (scm_ilength (binding) == 2, scm_s_bindings, what); | |
944 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (binding)), scm_s_variable, what); | |
945 | if (scm_c_improper_memq (SCM_CAR (binding), rvars)) | |
db4b4ca6 | 946 | scm_misc_error (what, scm_s_duplicate_bindings, SCM_EOL); |
302c12b4 DH |
947 | rvars = scm_cons (SCM_CAR (binding), rvars); |
948 | *initloc = scm_list_1 (SCM_CADR (binding)); | |
a23afe53 | 949 | initloc = SCM_CDRLOC (*initloc); |
302c12b4 | 950 | bindings = SCM_CDR (bindings); |
0f2d19dd | 951 | } |
302c12b4 | 952 | while (!SCM_NULLP (bindings)); |
26d5b9b4 | 953 | |
302c12b4 | 954 | *rvarloc = rvars; |
0f2d19dd JB |
955 | } |
956 | ||
302c12b4 | 957 | |
26d5b9b4 | 958 | SCM_SYNTAX(s_letrec, "letrec", scm_makmmacro, scm_m_letrec); |
2f0d1375 | 959 | SCM_GLOBAL_SYMBOL(scm_sym_letrec, s_letrec); |
26d5b9b4 MD |
960 | |
961 | SCM | |
6e8d25a6 | 962 | scm_m_letrec (SCM xorig, SCM env) |
26d5b9b4 MD |
963 | { |
964 | SCM x = SCM_CDR (xorig); | |
302c12b4 | 965 | SCM_ASSYNT (SCM_CONSP (x), scm_s_bindings, s_letrec); |
26d5b9b4 | 966 | |
302c12b4 DH |
967 | if (SCM_NULLP (SCM_CAR (x))) |
968 | { | |
969 | /* null binding, let* faster */ | |
970 | SCM body = scm_m_body (SCM_IM_LETREC, SCM_CDR (x), s_letrec); | |
971 | return scm_m_letstar (scm_cons2 (SCM_CAR (xorig), SCM_EOL, body), env); | |
972 | } | |
26d5b9b4 | 973 | else |
302c12b4 DH |
974 | { |
975 | SCM rvars, inits, body; | |
976 | transform_bindings (SCM_CAR (x), &rvars, &inits, "letrec"); | |
977 | body = scm_m_body (SCM_IM_LETREC, SCM_CDR (x), "letrec"); | |
978 | return scm_cons2 (SCM_IM_LETREC, rvars, scm_cons (inits, body)); | |
979 | } | |
26d5b9b4 | 980 | } |
1cc91f1b | 981 | |
302c12b4 | 982 | |
b8229a3b | 983 | SCM_SYNTAX(s_let, "let", scm_makmmacro, scm_m_let); |
2f0d1375 | 984 | SCM_GLOBAL_SYMBOL(scm_sym_let, s_let); |
b8229a3b | 985 | |
302c12b4 | 986 | SCM |
6e8d25a6 | 987 | scm_m_let (SCM xorig, SCM env) |
0f2d19dd | 988 | { |
302c12b4 DH |
989 | SCM x = SCM_CDR (xorig); |
990 | SCM temp; | |
991 | ||
992 | SCM_ASSYNT (SCM_CONSP (x), scm_s_bindings, s_let); | |
993 | temp = SCM_CAR (x); | |
994 | if (SCM_NULLP (temp) | |
995 | || (scm_ilength (temp) == 1 && SCM_CONSP (SCM_CAR (temp)))) | |
26d5b9b4 MD |
996 | { |
997 | /* null or single binding, let* is faster */ | |
3096b33f | 998 | SCM bindings = temp; |
302c12b4 | 999 | SCM body = scm_m_body (SCM_IM_LET, SCM_CDR (x), s_let); |
3096b33f | 1000 | return scm_m_letstar (scm_cons2 (SCM_CAR (xorig), bindings, body), env); |
26d5b9b4 | 1001 | } |
302c12b4 | 1002 | else if (SCM_CONSP (temp)) |
26d5b9b4 | 1003 | { |
3096b33f DH |
1004 | /* plain let */ |
1005 | SCM bindings = temp; | |
302c12b4 | 1006 | SCM rvars, inits, body; |
3096b33f | 1007 | transform_bindings (bindings, &rvars, &inits, "let"); |
302c12b4 DH |
1008 | body = scm_m_body (SCM_IM_LET, SCM_CDR (x), "let"); |
1009 | return scm_cons2 (SCM_IM_LET, rvars, scm_cons (inits, body)); | |
26d5b9b4 | 1010 | } |
302c12b4 DH |
1011 | else |
1012 | { | |
1013 | /* named let: Transform (let name ((var init) ...) body ...) into | |
1014 | * ((letrec ((name (lambda (var ...) body ...))) name) init ...) */ | |
26d5b9b4 | 1015 | |
302c12b4 DH |
1016 | SCM name = temp; |
1017 | SCM vars = SCM_EOL; | |
1018 | SCM *varloc = &vars; | |
1019 | SCM inits = SCM_EOL; | |
1020 | SCM *initloc = &inits; | |
1021 | SCM bindings; | |
1022 | ||
1023 | SCM_ASSYNT (SCM_SYMBOLP (name), scm_s_bindings, s_let); | |
1024 | x = SCM_CDR (x); | |
1025 | SCM_ASSYNT (SCM_CONSP (x), scm_s_bindings, s_let); | |
1026 | bindings = SCM_CAR (x); | |
1027 | SCM_ASSYNT (scm_ilength (bindings) >= 0, scm_s_bindings, s_let); | |
1028 | while (!SCM_NULLP (bindings)) | |
1029 | { /* vars and inits both in order */ | |
1030 | SCM binding = SCM_CAR (bindings); | |
1031 | SCM_ASSYNT (scm_ilength (binding) == 2, scm_s_bindings, s_let); | |
1032 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (binding)), scm_s_variable, s_let); | |
1033 | *varloc = scm_list_1 (SCM_CAR (binding)); | |
1034 | varloc = SCM_CDRLOC (*varloc); | |
1035 | *initloc = scm_list_1 (SCM_CADR (binding)); | |
1036 | initloc = SCM_CDRLOC (*initloc); | |
1037 | bindings = SCM_CDR (bindings); | |
1038 | } | |
26d5b9b4 | 1039 | |
302c12b4 DH |
1040 | { |
1041 | SCM lambda_body = scm_m_body (SCM_IM_LET, SCM_CDR (x), "let"); | |
1042 | SCM lambda_form = scm_cons2 (scm_sym_lambda, vars, lambda_body); | |
1043 | SCM rvar = scm_list_1 (name); | |
1044 | SCM init = scm_list_1 (lambda_form); | |
1045 | SCM body = scm_m_body (SCM_IM_LET, scm_list_1 (name), "let"); | |
1046 | SCM letrec = scm_cons2 (SCM_IM_LETREC, rvar, scm_cons (init, body)); | |
1047 | return scm_cons (letrec, inits); | |
1048 | } | |
1049 | } | |
0f2d19dd JB |
1050 | } |
1051 | ||
1052 | ||
81123e6d MD |
1053 | SCM_SYNTAX (s_atapply,"@apply", scm_makmmacro, scm_m_apply); |
1054 | SCM_GLOBAL_SYMBOL (scm_sym_atapply, s_atapply); | |
1055 | SCM_GLOBAL_SYMBOL (scm_sym_apply, s_atapply + 1); | |
1cc91f1b | 1056 | |
0f2d19dd | 1057 | SCM |
e81d98ec | 1058 | scm_m_apply (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 1059 | { |
160bb34a | 1060 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 2, scm_s_expression, s_atapply); |
0f2d19dd JB |
1061 | return scm_cons (SCM_IM_APPLY, SCM_CDR (xorig)); |
1062 | } | |
1063 | ||
b8229a3b MS |
1064 | |
1065 | SCM_SYNTAX(s_atcall_cc,"@call-with-current-continuation", scm_makmmacro, scm_m_cont); | |
2f0d1375 | 1066 | SCM_GLOBAL_SYMBOL(scm_sym_atcall_cc,s_atcall_cc); |
0f2d19dd | 1067 | |
1cc91f1b | 1068 | |
0f2d19dd | 1069 | SCM |
e81d98ec | 1070 | scm_m_cont (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 1071 | { |
6cb702da | 1072 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, |
160bb34a | 1073 | scm_s_expression, s_atcall_cc); |
3a3111a8 | 1074 | return scm_cons (SCM_IM_CONT, SCM_CDR (xorig)); |
0f2d19dd JB |
1075 | } |
1076 | ||
73b64342 MD |
1077 | /* Multi-language support */ |
1078 | ||
86d31dfe | 1079 | SCM_GLOBAL_SYMBOL (scm_lisp_nil, "nil"); |
1385d8ae | 1080 | SCM_GLOBAL_SYMBOL (scm_lisp_t, "t"); |
73b64342 MD |
1081 | |
1082 | SCM_SYNTAX (s_nil_cond, "nil-cond", scm_makmmacro, scm_m_nil_cond); | |
1083 | ||
1084 | SCM | |
e81d98ec | 1085 | scm_m_nil_cond (SCM xorig, SCM env SCM_UNUSED) |
73b64342 | 1086 | { |
c014a02e | 1087 | long len = scm_ilength (SCM_CDR (xorig)); |
160bb34a | 1088 | SCM_ASSYNT (len >= 1 && (len & 1) == 1, scm_s_expression, "nil-cond"); |
73b64342 MD |
1089 | return scm_cons (SCM_IM_NIL_COND, SCM_CDR (xorig)); |
1090 | } | |
1091 | ||
1092 | SCM_SYNTAX (s_nil_ify, "nil-ify", scm_makmmacro, scm_m_nil_ify); | |
1093 | ||
1094 | SCM | |
e81d98ec | 1095 | scm_m_nil_ify (SCM xorig, SCM env SCM_UNUSED) |
73b64342 | 1096 | { |
160bb34a | 1097 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, scm_s_expression, "nil-ify"); |
73b64342 MD |
1098 | return scm_cons (SCM_IM_NIL_IFY, SCM_CDR (xorig)); |
1099 | } | |
1100 | ||
1101 | SCM_SYNTAX (s_t_ify, "t-ify", scm_makmmacro, scm_m_t_ify); | |
1102 | ||
1103 | SCM | |
e81d98ec | 1104 | scm_m_t_ify (SCM xorig, SCM env SCM_UNUSED) |
73b64342 | 1105 | { |
160bb34a | 1106 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, scm_s_expression, "t-ify"); |
73b64342 MD |
1107 | return scm_cons (SCM_IM_T_IFY, SCM_CDR (xorig)); |
1108 | } | |
1109 | ||
1110 | SCM_SYNTAX (s_0_cond, "0-cond", scm_makmmacro, scm_m_0_cond); | |
1111 | ||
1112 | SCM | |
e81d98ec | 1113 | scm_m_0_cond (SCM xorig, SCM env SCM_UNUSED) |
73b64342 | 1114 | { |
c014a02e | 1115 | long len = scm_ilength (SCM_CDR (xorig)); |
160bb34a | 1116 | SCM_ASSYNT (len >= 1 && (len & 1) == 1, scm_s_expression, "0-cond"); |
73b64342 MD |
1117 | return scm_cons (SCM_IM_0_COND, SCM_CDR (xorig)); |
1118 | } | |
1119 | ||
1120 | SCM_SYNTAX (s_0_ify, "0-ify", scm_makmmacro, scm_m_0_ify); | |
1121 | ||
1122 | SCM | |
e81d98ec | 1123 | scm_m_0_ify (SCM xorig, SCM env SCM_UNUSED) |
73b64342 | 1124 | { |
160bb34a | 1125 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, scm_s_expression, "0-ify"); |
73b64342 MD |
1126 | return scm_cons (SCM_IM_0_IFY, SCM_CDR (xorig)); |
1127 | } | |
1128 | ||
1129 | SCM_SYNTAX (s_1_ify, "1-ify", scm_makmmacro, scm_m_1_ify); | |
1130 | ||
1131 | SCM | |
e81d98ec | 1132 | scm_m_1_ify (SCM xorig, SCM env SCM_UNUSED) |
73b64342 | 1133 | { |
160bb34a | 1134 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, scm_s_expression, "1-ify"); |
73b64342 MD |
1135 | return scm_cons (SCM_IM_1_IFY, SCM_CDR (xorig)); |
1136 | } | |
1137 | ||
1138 | SCM_SYNTAX (s_atfop, "@fop", scm_makmmacro, scm_m_atfop); | |
1139 | ||
1140 | SCM | |
e81d98ec | 1141 | scm_m_atfop (SCM xorig, SCM env SCM_UNUSED) |
73b64342 | 1142 | { |
86d31dfe | 1143 | SCM x = SCM_CDR (xorig), var; |
160bb34a | 1144 | SCM_ASSYNT (scm_ilength (x) >= 1, scm_s_expression, "@fop"); |
86d31dfe MV |
1145 | var = scm_symbol_fref (SCM_CAR (x)); |
1146 | SCM_ASSYNT (SCM_VARIABLEP (var), | |
73b64342 | 1147 | "Symbol's function definition is void", NULL); |
904a077d | 1148 | SCM_SETCAR (x, var); |
73b64342 MD |
1149 | return x; |
1150 | } | |
1151 | ||
2e171178 MV |
1152 | /* (@bind ((var exp) ...) body ...) |
1153 | ||
1154 | This will assign the values of the `exp's to the global variables | |
1155 | named by `var's (symbols, not evaluated), creating them if they | |
1156 | don't exist, executes body, and then restores the previous values of | |
1157 | the `var's. Additionally, whenever control leaves body, the values | |
1158 | of the `var's are saved and restored when control returns. It is an | |
1159 | error when a symbol appears more than once among the `var's. | |
1160 | All `exp's are evaluated before any `var' is set. | |
1161 | ||
1162 | This of this as `let' for dynamic scope. | |
1163 | ||
1164 | It is memoized into (#@bind ((var ...) . (reversed-val ...)) body ...). | |
1165 | ||
1166 | XXX - also implement `@bind*'. | |
1167 | */ | |
1168 | ||
73b64342 MD |
1169 | SCM_SYNTAX (s_atbind, "@bind", scm_makmmacro, scm_m_atbind); |
1170 | ||
1171 | SCM | |
1172 | scm_m_atbind (SCM xorig, SCM env) | |
1173 | { | |
1174 | SCM x = SCM_CDR (xorig); | |
2e171178 | 1175 | SCM top_level = scm_env_top_level (env); |
311f6782 | 1176 | SCM vars = SCM_EOL, var; |
2e171178 MV |
1177 | SCM exps = SCM_EOL; |
1178 | ||
1179 | SCM_ASSYNT (scm_ilength (x) > 1, scm_s_expression, s_atbind); | |
73b64342 | 1180 | |
73b64342 MD |
1181 | x = SCM_CAR (x); |
1182 | while (SCM_NIMP (x)) | |
1183 | { | |
2e171178 MV |
1184 | SCM rest; |
1185 | SCM sym_exp = SCM_CAR (x); | |
1186 | SCM_ASSYNT (scm_ilength (sym_exp) == 2, scm_s_bindings, s_atbind); | |
1187 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (sym_exp)), scm_s_bindings, s_atbind); | |
73b64342 | 1188 | x = SCM_CDR (x); |
2e171178 | 1189 | for (rest = x; SCM_NIMP (rest); rest = SCM_CDR (rest)) |
8ea46249 | 1190 | if (SCM_EQ_P (SCM_CAR (sym_exp), SCM_CAAR (rest))) |
2e171178 | 1191 | scm_misc_error (s_atbind, scm_s_duplicate_bindings, SCM_EOL); |
311f6782 MV |
1192 | /* The first call to scm_sym2var will look beyond the current |
1193 | module, while the second call wont. */ | |
1194 | var = scm_sym2var (SCM_CAR (sym_exp), top_level, SCM_BOOL_F); | |
1195 | if (SCM_FALSEP (var)) | |
1196 | var = scm_sym2var (SCM_CAR (sym_exp), top_level, SCM_BOOL_T); | |
1197 | vars = scm_cons (var, vars); | |
2e171178 | 1198 | exps = scm_cons (SCM_CADR (sym_exp), exps); |
73b64342 | 1199 | } |
2e171178 MV |
1200 | return scm_cons (SCM_IM_BIND, |
1201 | scm_cons (scm_cons (scm_reverse_x (vars, SCM_EOL), exps), | |
1202 | SCM_CDDR (xorig))); | |
73b64342 | 1203 | } |
73b64342 | 1204 | |
a513ead3 MV |
1205 | SCM_SYNTAX (s_at_call_with_values, "@call-with-values", scm_makmmacro, scm_m_at_call_with_values); |
1206 | SCM_GLOBAL_SYMBOL(scm_sym_at_call_with_values, s_at_call_with_values); | |
1207 | ||
1208 | SCM | |
e81d98ec | 1209 | scm_m_at_call_with_values (SCM xorig, SCM env SCM_UNUSED) |
a513ead3 MV |
1210 | { |
1211 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 2, | |
1212 | scm_s_expression, s_at_call_with_values); | |
1213 | return scm_cons (SCM_IM_CALL_WITH_VALUES, SCM_CDR (xorig)); | |
1214 | } | |
1215 | ||
26d5b9b4 MD |
1216 | SCM |
1217 | scm_m_expand_body (SCM xorig, SCM env) | |
1218 | { | |
22a52da1 | 1219 | SCM x = SCM_CDR (xorig), defs = SCM_EOL; |
26d5b9b4 MD |
1220 | char *what = SCM_ISYMCHARS (SCM_CAR (xorig)) + 2; |
1221 | ||
1222 | while (SCM_NIMP (x)) | |
1223 | { | |
22a52da1 DH |
1224 | SCM form = SCM_CAR (x); |
1225 | if (!SCM_CONSP (form)) | |
26d5b9b4 MD |
1226 | break; |
1227 | if (!SCM_SYMBOLP (SCM_CAR (form))) | |
1228 | break; | |
22a52da1 | 1229 | |
3a3111a8 MD |
1230 | form = scm_macroexp (scm_cons_source (form, |
1231 | SCM_CAR (form), | |
1232 | SCM_CDR (form)), | |
1233 | env); | |
26d5b9b4 | 1234 | |
cf498326 | 1235 | if (SCM_EQ_P (SCM_IM_DEFINE, SCM_CAR (form))) |
26d5b9b4 MD |
1236 | { |
1237 | defs = scm_cons (SCM_CDR (form), defs); | |
22a52da1 | 1238 | x = SCM_CDR (x); |
26d5b9b4 | 1239 | } |
22a52da1 | 1240 | else if (!SCM_IMP (defs)) |
26d5b9b4 MD |
1241 | { |
1242 | break; | |
1243 | } | |
cf498326 | 1244 | else if (SCM_EQ_P (SCM_IM_BEGIN, SCM_CAR (form))) |
26d5b9b4 | 1245 | { |
8ea46249 | 1246 | x = scm_append (scm_list_2 (SCM_CDR (form), SCM_CDR (x))); |
26d5b9b4 MD |
1247 | } |
1248 | else | |
1249 | { | |
22a52da1 | 1250 | x = scm_cons (form, SCM_CDR (x)); |
26d5b9b4 MD |
1251 | break; |
1252 | } | |
1253 | } | |
1254 | ||
302c12b4 | 1255 | if (!SCM_NULLP (defs)) |
26d5b9b4 | 1256 | { |
302c12b4 DH |
1257 | SCM rvars, inits, body, letrec; |
1258 | transform_bindings (defs, &rvars, &inits, what); | |
1259 | body = scm_m_body (SCM_IM_DEFINE, x, what); | |
1260 | letrec = scm_cons2 (SCM_IM_LETREC, rvars, scm_cons (inits, body)); | |
1261 | SCM_SETCAR (xorig, letrec); | |
1262 | SCM_SETCDR (xorig, SCM_EOL); | |
1263 | } | |
1264 | else | |
1265 | { | |
1266 | SCM_ASSYNT (SCM_CONSP (x), scm_s_body, what); | |
1267 | SCM_SETCAR (xorig, SCM_CAR (x)); | |
1268 | SCM_SETCDR (xorig, SCM_CDR (x)); | |
26d5b9b4 | 1269 | } |
26d5b9b4 MD |
1270 | |
1271 | return xorig; | |
1272 | } | |
1273 | ||
1274 | SCM | |
1275 | scm_macroexp (SCM x, SCM env) | |
1276 | { | |
86d31dfe | 1277 | SCM res, proc, orig_sym; |
26d5b9b4 MD |
1278 | |
1279 | /* Don't bother to produce error messages here. We get them when we | |
1280 | eventually execute the code for real. */ | |
1281 | ||
1282 | macro_tail: | |
86d31dfe MV |
1283 | orig_sym = SCM_CAR (x); |
1284 | if (!SCM_SYMBOLP (orig_sym)) | |
26d5b9b4 MD |
1285 | return x; |
1286 | ||
1287 | #ifdef USE_THREADS | |
1288 | { | |
1289 | SCM *proc_ptr = scm_lookupcar1 (x, env, 0); | |
1290 | if (proc_ptr == NULL) | |
1291 | { | |
1292 | /* We have lost the race. */ | |
1293 | goto macro_tail; | |
1294 | } | |
1295 | proc = *proc_ptr; | |
1296 | } | |
1297 | #else | |
1298 | proc = *scm_lookupcar (x, env, 0); | |
1299 | #endif | |
1300 | ||
1301 | /* Only handle memoizing macros. `Acros' and `macros' are really | |
1302 | special forms and should not be evaluated here. */ | |
1303 | ||
22a52da1 | 1304 | if (!SCM_MACROP (proc) || SCM_MACRO_TYPE (proc) != 2) |
26d5b9b4 MD |
1305 | return x; |
1306 | ||
86d31dfe | 1307 | SCM_SETCAR (x, orig_sym); /* Undo memoizing effect of lookupcar */ |
fdc28395 | 1308 | res = scm_call_2 (SCM_MACRO_CODE (proc), x, env); |
26d5b9b4 MD |
1309 | |
1310 | if (scm_ilength (res) <= 0) | |
8ea46249 | 1311 | res = scm_list_2 (SCM_IM_BEGIN, res); |
26d5b9b4 | 1312 | |
26d5b9b4 MD |
1313 | SCM_DEFER_INTS; |
1314 | SCM_SETCAR (x, SCM_CAR (res)); | |
1315 | SCM_SETCDR (x, SCM_CDR (res)); | |
1316 | SCM_ALLOW_INTS; | |
1317 | ||
1318 | goto macro_tail; | |
1319 | } | |
73b64342 | 1320 | |
6dbd0af5 MD |
1321 | /* scm_unmemocopy takes a memoized expression together with its |
1322 | * environment and rewrites it to its original form. Thus, it is the | |
1323 | * inversion of the rewrite rules above. The procedure is not | |
1324 | * optimized for speed. It's used in scm_iprin1 when printing the | |
220ff1eb MD |
1325 | * code of a closure, in scm_procedure_source, in display_frame when |
1326 | * generating the source for a stackframe in a backtrace, and in | |
1327 | * display_expression. | |
86d31dfe MV |
1328 | * |
1329 | * Unmemoizing is not a realiable process. You can not in general | |
1330 | * expect to get the original source back. | |
1331 | * | |
1332 | * However, GOOPS currently relies on this for method compilation. | |
1333 | * This ought to change. | |
26d5b9b4 MD |
1334 | */ |
1335 | ||
f1267706 | 1336 | #define SCM_BIT8(x) (127 & SCM_UNPACK (x)) |
c209c88e | 1337 | |
8ea46249 DH |
1338 | static SCM |
1339 | build_binding_list (SCM names, SCM inits) | |
1340 | { | |
1341 | SCM bindings = SCM_EOL; | |
1342 | while (!SCM_NULLP (names)) | |
1343 | { | |
1344 | SCM binding = scm_list_2 (SCM_CAR (names), SCM_CAR (inits)); | |
1345 | bindings = scm_cons (binding, bindings); | |
1346 | names = SCM_CDR (names); | |
1347 | inits = SCM_CDR (inits); | |
1348 | } | |
1349 | return bindings; | |
1350 | } | |
1351 | ||
6dbd0af5 | 1352 | static SCM |
1bbd0b84 | 1353 | unmemocopy (SCM x, SCM env) |
6dbd0af5 MD |
1354 | { |
1355 | SCM ls, z; | |
1356 | #ifdef DEBUG_EXTENSIONS | |
1357 | SCM p; | |
1358 | #endif | |
8c494e99 | 1359 | if (!SCM_CONSP (x)) |
6dbd0af5 MD |
1360 | return x; |
1361 | #ifdef DEBUG_EXTENSIONS | |
1362 | p = scm_whash_lookup (scm_source_whash, x); | |
1363 | #endif | |
8ea46249 | 1364 | switch (SCM_ITAG7 (SCM_CAR (x))) |
6dbd0af5 | 1365 | { |
c209c88e | 1366 | case SCM_BIT8(SCM_IM_AND): |
2f0d1375 | 1367 | ls = z = scm_cons (scm_sym_and, SCM_UNSPECIFIED); |
6dbd0af5 | 1368 | break; |
c209c88e | 1369 | case SCM_BIT8(SCM_IM_BEGIN): |
2f0d1375 | 1370 | ls = z = scm_cons (scm_sym_begin, SCM_UNSPECIFIED); |
6dbd0af5 | 1371 | break; |
c209c88e | 1372 | case SCM_BIT8(SCM_IM_CASE): |
2f0d1375 | 1373 | ls = z = scm_cons (scm_sym_case, SCM_UNSPECIFIED); |
6dbd0af5 | 1374 | break; |
c209c88e | 1375 | case SCM_BIT8(SCM_IM_COND): |
2f0d1375 | 1376 | ls = z = scm_cons (scm_sym_cond, SCM_UNSPECIFIED); |
6dbd0af5 | 1377 | break; |
8ea46249 | 1378 | case SCM_BIT8 (SCM_IM_DO): |
6dbd0af5 | 1379 | { |
8ea46249 DH |
1380 | /* format: (#@do (nk nk-1 ...) (i1 ... ik) (test) (body) s1 ... sk), |
1381 | * where nx is the name of a local variable, ix is an initializer for | |
1382 | * the local variable, test is the test clause of the do loop, body is | |
1383 | * the body of the do loop and sx are the step clauses for the local | |
1384 | * variables. */ | |
1385 | SCM names, inits, test, memoized_body, steps, bindings; | |
1386 | ||
1387 | x = SCM_CDR (x); | |
1388 | names = SCM_CAR (x); | |
6dbd0af5 | 1389 | x = SCM_CDR (x); |
8ea46249 DH |
1390 | inits = scm_reverse (unmemocopy (SCM_CAR (x), env)); |
1391 | env = EXTEND_ENV (names, SCM_EOL, env); | |
6dbd0af5 | 1392 | x = SCM_CDR (x); |
8ea46249 DH |
1393 | test = unmemocopy (SCM_CAR (x), env); |
1394 | x = SCM_CDR (x); | |
1395 | memoized_body = SCM_CAR (x); | |
1396 | x = SCM_CDR (x); | |
1397 | steps = scm_reverse (unmemocopy (x, env)); | |
1398 | ||
26d5b9b4 | 1399 | /* build transformed binding list */ |
8ea46249 DH |
1400 | bindings = SCM_EOL; |
1401 | while (!SCM_NULLP (names)) | |
6dbd0af5 | 1402 | { |
8ea46249 DH |
1403 | SCM name = SCM_CAR (names); |
1404 | SCM init = SCM_CAR (inits); | |
1405 | SCM step = SCM_CAR (steps); | |
1406 | step = SCM_EQ_P (step, name) ? SCM_EOL : scm_list_1 (step); | |
1407 | ||
1408 | bindings = scm_cons (scm_cons2 (name, init, step), bindings); | |
1409 | ||
1410 | names = SCM_CDR (names); | |
1411 | inits = SCM_CDR (inits); | |
1412 | steps = SCM_CDR (steps); | |
6dbd0af5 | 1413 | } |
8ea46249 DH |
1414 | z = scm_cons (test, SCM_UNSPECIFIED); |
1415 | ls = scm_cons2 (scm_sym_do, bindings, z); | |
1416 | ||
1417 | x = scm_cons (SCM_BOOL_F, memoized_body); | |
1418 | break; | |
1419 | } | |
1420 | case SCM_BIT8(SCM_IM_IF): | |
1421 | ls = z = scm_cons (scm_sym_if, SCM_UNSPECIFIED); | |
1422 | break; | |
1423 | case SCM_BIT8 (SCM_IM_LET): | |
1424 | { | |
1425 | /* format: (#@let (nk nk-1 ...) (i1 ... ik) b1 ...), | |
1426 | * where nx is the name of a local variable, ix is an initializer for | |
1427 | * the local variable and by are the body clauses. */ | |
1428 | SCM names, inits, bindings; | |
1429 | ||
1430 | x = SCM_CDR (x); | |
1431 | names = SCM_CAR (x); | |
1432 | x = SCM_CDR (x); | |
1433 | inits = scm_reverse (unmemocopy (SCM_CAR (x), env)); | |
1434 | env = EXTEND_ENV (names, SCM_EOL, env); | |
1435 | ||
1436 | bindings = build_binding_list (names, inits); | |
1437 | z = scm_cons (bindings, SCM_UNSPECIFIED); | |
1438 | ls = scm_cons (scm_sym_let, z); | |
1439 | break; | |
1440 | } | |
1441 | case SCM_BIT8 (SCM_IM_LETREC): | |
1442 | { | |
1443 | /* format: (#@letrec (nk nk-1 ...) (i1 ... ik) b1 ...), | |
1444 | * where nx is the name of a local variable, ix is an initializer for | |
1445 | * the local variable and by are the body clauses. */ | |
1446 | SCM names, inits, bindings; | |
1447 | ||
1448 | x = SCM_CDR (x); | |
1449 | names = SCM_CAR (x); | |
1450 | env = EXTEND_ENV (names, SCM_EOL, env); | |
1451 | x = SCM_CDR (x); | |
1452 | inits = scm_reverse (unmemocopy (SCM_CAR (x), env)); | |
1453 | ||
1454 | bindings = build_binding_list (names, inits); | |
1455 | z = scm_cons (bindings, SCM_UNSPECIFIED); | |
1456 | ls = scm_cons (scm_sym_letrec, z); | |
6dbd0af5 MD |
1457 | break; |
1458 | } | |
c209c88e | 1459 | case SCM_BIT8(SCM_IM_LETSTAR): |
6dbd0af5 MD |
1460 | { |
1461 | SCM b, y; | |
1462 | x = SCM_CDR (x); | |
1463 | b = SCM_CAR (x); | |
1464 | y = SCM_EOL; | |
1465 | if SCM_IMP (b) | |
1466 | { | |
e2806c10 | 1467 | env = EXTEND_ENV (SCM_EOL, SCM_EOL, env); |
6dbd0af5 MD |
1468 | goto letstar; |
1469 | } | |
1470 | y = z = scm_acons (SCM_CAR (b), | |
1471 | unmemocar ( | |
8ea46249 | 1472 | scm_cons (unmemocopy (SCM_CADR (b), env), SCM_EOL), env), |
6dbd0af5 | 1473 | SCM_UNSPECIFIED); |
e2806c10 | 1474 | env = EXTEND_ENV (SCM_CAR (b), SCM_BOOL_F, env); |
8ea46249 | 1475 | b = SCM_CDDR (b); |
6dbd0af5 MD |
1476 | if (SCM_IMP (b)) |
1477 | { | |
1478 | SCM_SETCDR (y, SCM_EOL); | |
2f0d1375 | 1479 | ls = scm_cons (scm_sym_let, z = scm_cons (y, SCM_UNSPECIFIED)); |
6dbd0af5 MD |
1480 | break; |
1481 | } | |
1482 | do | |
1483 | { | |
a23afe53 MD |
1484 | SCM_SETCDR (z, scm_acons (SCM_CAR (b), |
1485 | unmemocar ( | |
8ea46249 | 1486 | scm_list_1 (unmemocopy (SCM_CADR (b), env)), env), |
a23afe53 MD |
1487 | SCM_UNSPECIFIED)); |
1488 | z = SCM_CDR (z); | |
e2806c10 | 1489 | env = EXTEND_ENV (SCM_CAR (b), SCM_BOOL_F, env); |
8ea46249 | 1490 | b = SCM_CDDR (b); |
6dbd0af5 | 1491 | } |
ff467021 | 1492 | while (SCM_NIMP (b)); |
a23afe53 | 1493 | SCM_SETCDR (z, SCM_EOL); |
6dbd0af5 | 1494 | letstar: |
2f0d1375 | 1495 | ls = scm_cons (scm_sym_letstar, z = scm_cons (y, SCM_UNSPECIFIED)); |
6dbd0af5 MD |
1496 | break; |
1497 | } | |
c209c88e | 1498 | case SCM_BIT8(SCM_IM_OR): |
2f0d1375 | 1499 | ls = z = scm_cons (scm_sym_or, SCM_UNSPECIFIED); |
6dbd0af5 | 1500 | break; |
c209c88e | 1501 | case SCM_BIT8(SCM_IM_LAMBDA): |
6dbd0af5 | 1502 | x = SCM_CDR (x); |
8ea46249 DH |
1503 | z = scm_cons (SCM_CAR (x), SCM_UNSPECIFIED); |
1504 | ls = scm_cons (scm_sym_lambda, z); | |
e2806c10 | 1505 | env = EXTEND_ENV (SCM_CAR (x), SCM_EOL, env); |
6dbd0af5 | 1506 | break; |
c209c88e | 1507 | case SCM_BIT8(SCM_IM_QUOTE): |
2f0d1375 | 1508 | ls = z = scm_cons (scm_sym_quote, SCM_UNSPECIFIED); |
6dbd0af5 | 1509 | break; |
c209c88e | 1510 | case SCM_BIT8(SCM_IM_SET_X): |
89efbff4 | 1511 | ls = z = scm_cons (scm_sym_set_x, SCM_UNSPECIFIED); |
6dbd0af5 | 1512 | break; |
c209c88e | 1513 | case SCM_BIT8(SCM_IM_DEFINE): |
6dbd0af5 MD |
1514 | { |
1515 | SCM n; | |
1516 | x = SCM_CDR (x); | |
8ea46249 DH |
1517 | n = SCM_CAR (x); |
1518 | z = scm_cons (n, SCM_UNSPECIFIED); | |
1519 | ls = scm_cons (scm_sym_define, z); | |
01f11e02 | 1520 | if (!SCM_NULLP (env)) |
8ea46249 | 1521 | SCM_SETCAR (SCM_CAR (env), scm_cons (n, SCM_CAAR (env))); |
6dbd0af5 MD |
1522 | break; |
1523 | } | |
c209c88e | 1524 | case SCM_BIT8(SCM_MAKISYM (0)): |
6dbd0af5 MD |
1525 | z = SCM_CAR (x); |
1526 | if (!SCM_ISYMP (z)) | |
1527 | goto unmemo; | |
ff467021 | 1528 | switch (SCM_ISYMNUM (z)) |
6dbd0af5 MD |
1529 | { |
1530 | case (SCM_ISYMNUM (SCM_IM_APPLY)): | |
2f0d1375 | 1531 | ls = z = scm_cons (scm_sym_atapply, SCM_UNSPECIFIED); |
6dbd0af5 MD |
1532 | goto loop; |
1533 | case (SCM_ISYMNUM (SCM_IM_CONT)): | |
2f0d1375 | 1534 | ls = z = scm_cons (scm_sym_atcall_cc, SCM_UNSPECIFIED); |
6dbd0af5 | 1535 | goto loop; |
a570e93a MD |
1536 | case (SCM_ISYMNUM (SCM_IM_DELAY)): |
1537 | ls = z = scm_cons (scm_sym_delay, SCM_UNSPECIFIED); | |
1538 | x = SCM_CDR (x); | |
1539 | goto loop; | |
a513ead3 MV |
1540 | case (SCM_ISYMNUM (SCM_IM_CALL_WITH_VALUES)): |
1541 | ls = z = scm_cons (scm_sym_at_call_with_values, SCM_UNSPECIFIED); | |
1542 | goto loop; | |
6dbd0af5 | 1543 | default: |
fa888178 | 1544 | /* appease the Sun compiler god: */ ; |
6dbd0af5 MD |
1545 | } |
1546 | unmemo: | |
1547 | default: | |
1548 | ls = z = unmemocar (scm_cons (unmemocopy (SCM_CAR (x), env), | |
1549 | SCM_UNSPECIFIED), | |
1550 | env); | |
1551 | } | |
1552 | loop: | |
8c494e99 DH |
1553 | x = SCM_CDR (x); |
1554 | while (SCM_CONSP (x)) | |
a23afe53 | 1555 | { |
8c494e99 DH |
1556 | SCM form = SCM_CAR (x); |
1557 | if (!SCM_ISYMP (form)) | |
1558 | { | |
1559 | SCM copy = scm_cons (unmemocopy (form, env), SCM_UNSPECIFIED); | |
1560 | SCM_SETCDR (z, unmemocar (copy, env)); | |
1561 | z = SCM_CDR (z); | |
1562 | } | |
1563 | x = SCM_CDR (x); | |
a23afe53 MD |
1564 | } |
1565 | SCM_SETCDR (z, x); | |
6dbd0af5 | 1566 | #ifdef DEBUG_EXTENSIONS |
01f11e02 | 1567 | if (!SCM_FALSEP (p)) |
6dbd0af5 MD |
1568 | scm_whash_insert (scm_source_whash, ls, p); |
1569 | #endif | |
1570 | return ls; | |
1571 | } | |
1572 | ||
1cc91f1b | 1573 | |
6dbd0af5 | 1574 | SCM |
6e8d25a6 | 1575 | scm_unmemocopy (SCM x, SCM env) |
6dbd0af5 | 1576 | { |
01f11e02 | 1577 | if (!SCM_NULLP (env)) |
6dbd0af5 MD |
1578 | /* Make a copy of the lowest frame to protect it from |
1579 | modifications by SCM_IM_DEFINE */ | |
1580 | return unmemocopy (x, scm_cons (SCM_CAR (env), SCM_CDR (env))); | |
1581 | else | |
1582 | return unmemocopy (x, env); | |
1583 | } | |
1584 | ||
cf7c17e9 | 1585 | #ifndef SCM_RECKLESS |
1cc91f1b | 1586 | |
0f2d19dd | 1587 | int |
6e8d25a6 | 1588 | scm_badargsp (SCM formals, SCM args) |
0f2d19dd | 1589 | { |
ff467021 | 1590 | while (SCM_NIMP (formals)) |
0f2d19dd | 1591 | { |
01f11e02 | 1592 | if (!SCM_CONSP (formals)) |
ff467021 JB |
1593 | return 0; |
1594 | if (SCM_IMP(args)) | |
1595 | return 1; | |
0f2d19dd JB |
1596 | formals = SCM_CDR (formals); |
1597 | args = SCM_CDR (args); | |
1598 | } | |
01f11e02 | 1599 | return !SCM_NULLP (args) ? 1 : 0; |
0f2d19dd JB |
1600 | } |
1601 | #endif | |
1602 | ||
002f1a5d MD |
1603 | static int |
1604 | scm_badformalsp (SCM closure, int n) | |
1605 | { | |
726d810a DH |
1606 | SCM formals = SCM_CLOSURE_FORMALS (closure); |
1607 | while (!SCM_NULLP (formals)) | |
002f1a5d | 1608 | { |
726d810a | 1609 | if (!SCM_CONSP (formals)) |
002f1a5d MD |
1610 | return 0; |
1611 | if (n == 0) | |
1612 | return 1; | |
1613 | --n; | |
1614 | formals = SCM_CDR (formals); | |
1615 | } | |
1616 | return n; | |
1617 | } | |
0f2d19dd JB |
1618 | |
1619 | \f | |
6dbd0af5 | 1620 | SCM |
6e8d25a6 | 1621 | scm_eval_args (SCM l, SCM env, SCM proc) |
6dbd0af5 | 1622 | { |
680ed4a8 | 1623 | SCM results = SCM_EOL, *lloc = &results, res; |
904a077d | 1624 | while (SCM_CONSP (l)) |
6dbd0af5 | 1625 | { |
680ed4a8 | 1626 | res = EVALCAR (l, env); |
904a077d | 1627 | |
8ea46249 | 1628 | *lloc = scm_list_1 (res); |
a23afe53 | 1629 | lloc = SCM_CDRLOC (*lloc); |
6dbd0af5 MD |
1630 | l = SCM_CDR (l); |
1631 | } | |
cf7c17e9 | 1632 | #ifdef SCM_CAUTIOUS |
22a52da1 | 1633 | if (!SCM_NULLP (l)) |
904a077d | 1634 | scm_wrong_num_args (proc); |
680ed4a8 MD |
1635 | #endif |
1636 | return results; | |
6dbd0af5 | 1637 | } |
c4ac4d88 | 1638 | |
9de33deb MD |
1639 | SCM |
1640 | scm_eval_body (SCM code, SCM env) | |
1641 | { | |
1642 | SCM next; | |
1643 | again: | |
01f11e02 DH |
1644 | next = SCM_CDR (code); |
1645 | while (!SCM_NULLP (next)) | |
9de33deb MD |
1646 | { |
1647 | if (SCM_IMP (SCM_CAR (code))) | |
1648 | { | |
1649 | if (SCM_ISYMP (SCM_CAR (code))) | |
1650 | { | |
1651 | code = scm_m_expand_body (code, env); | |
1652 | goto again; | |
1653 | } | |
1654 | } | |
1655 | else | |
1656 | SCM_XEVAL (SCM_CAR (code), env); | |
1657 | code = next; | |
01f11e02 | 1658 | next = SCM_CDR (code); |
9de33deb MD |
1659 | } |
1660 | return SCM_XEVALCAR (code, env); | |
1661 | } | |
1662 | ||
c4ac4d88 | 1663 | |
0f2d19dd JB |
1664 | #endif /* !DEVAL */ |
1665 | ||
6dbd0af5 MD |
1666 | |
1667 | /* SECTION: This code is specific for the debugging support. One | |
1668 | * branch is read when DEVAL isn't defined, the other when DEVAL is | |
1669 | * defined. | |
1670 | */ | |
1671 | ||
1672 | #ifndef DEVAL | |
1673 | ||
1674 | #define SCM_APPLY scm_apply | |
1675 | #define PREP_APPLY(proc, args) | |
1676 | #define ENTER_APPLY | |
ddea3325 | 1677 | #define RETURN(x) do { return x; } while (0) |
b7ff98dd MD |
1678 | #ifdef STACK_CHECKING |
1679 | #ifndef NO_CEVAL_STACK_CHECKING | |
1680 | #define EVAL_STACK_CHECKING | |
1681 | #endif | |
6dbd0af5 MD |
1682 | #endif |
1683 | ||
1684 | #else /* !DEVAL */ | |
1685 | ||
0f2d19dd JB |
1686 | #undef SCM_CEVAL |
1687 | #define SCM_CEVAL scm_deval /* Substitute all uses of scm_ceval */ | |
1688 | #undef SCM_APPLY | |
1689 | #define SCM_APPLY scm_dapply | |
6dbd0af5 MD |
1690 | #undef PREP_APPLY |
1691 | #define PREP_APPLY(p, l) \ | |
1692 | { ++debug.info; debug.info->a.proc = p; debug.info->a.args = l; } | |
1693 | #undef ENTER_APPLY | |
1694 | #define ENTER_APPLY \ | |
d3a6bc94 | 1695 | do { \ |
b7ff98dd | 1696 | SCM_SET_ARGSREADY (debug);\ |
b6d75948 | 1697 | if (CHECK_APPLY && SCM_TRAPS_P)\ |
b7ff98dd | 1698 | if (SCM_APPLY_FRAME_P || (SCM_TRACE_P && PROCTRACEP (proc)))\ |
6dbd0af5 | 1699 | {\ |
156dcb09 | 1700 | SCM tmp, tail = SCM_BOOL(SCM_TRACED_FRAME_P (debug)); \ |
c6a4fbce | 1701 | SCM_SET_TRACED_FRAME (debug); \ |
d95c0b76 | 1702 | SCM_TRAPS_P = 0;\ |
b7ff98dd | 1703 | if (SCM_CHEAPTRAPS_P)\ |
6dbd0af5 | 1704 | {\ |
c0ab1b8d | 1705 | tmp = scm_make_debugobj (&debug);\ |
d95c0b76 | 1706 | scm_call_3 (SCM_APPLY_FRAME_HDLR, scm_sym_apply_frame, tmp, tail);\ |
b6d75948 | 1707 | }\ |
6dbd0af5 MD |
1708 | else\ |
1709 | {\ | |
5f144b10 GH |
1710 | int first;\ |
1711 | tmp = scm_make_continuation (&first);\ | |
1712 | if (first)\ | |
d95c0b76 | 1713 | scm_call_3 (SCM_APPLY_FRAME_HDLR, scm_sym_apply_frame, tmp, tail);\ |
6dbd0af5 | 1714 | }\ |
d95c0b76 | 1715 | SCM_TRAPS_P = 1;\ |
6dbd0af5 | 1716 | }\ |
d3a6bc94 | 1717 | } while (0) |
0f2d19dd | 1718 | #undef RETURN |
ddea3325 | 1719 | #define RETURN(e) do { proc = (e); goto exit; } while (0) |
b7ff98dd MD |
1720 | #ifdef STACK_CHECKING |
1721 | #ifndef EVAL_STACK_CHECKING | |
1722 | #define EVAL_STACK_CHECKING | |
1723 | #endif | |
6dbd0af5 MD |
1724 | #endif |
1725 | ||
1726 | /* scm_ceval_ptr points to the currently selected evaluator. | |
1727 | * *fixme*: Although efficiency is important here, this state variable | |
1728 | * should probably not be a global. It should be related to the | |
1729 | * current repl. | |
1730 | */ | |
1731 | ||
1cc91f1b | 1732 | |
1bbd0b84 | 1733 | SCM (*scm_ceval_ptr) (SCM x, SCM env); |
0f2d19dd | 1734 | |
1646d37b | 1735 | /* scm_last_debug_frame contains a pointer to the last debugging |
6dbd0af5 MD |
1736 | * information stack frame. It is accessed very often from the |
1737 | * debugging evaluator, so it should probably not be indirectly | |
1738 | * addressed. Better to save and restore it from the current root at | |
1739 | * any stack swaps. | |
1740 | */ | |
1741 | ||
1646d37b | 1742 | #ifndef USE_THREADS |
92c2555f | 1743 | scm_t_debug_frame *scm_last_debug_frame; |
1646d37b | 1744 | #endif |
6dbd0af5 MD |
1745 | |
1746 | /* scm_debug_eframe_size is the number of slots available for pseudo | |
1747 | * stack frames at each real stack frame. | |
1748 | */ | |
1749 | ||
c014a02e | 1750 | long scm_debug_eframe_size; |
6dbd0af5 | 1751 | |
b7ff98dd | 1752 | int scm_debug_mode, scm_check_entry_p, scm_check_apply_p, scm_check_exit_p; |
6dbd0af5 | 1753 | |
c014a02e | 1754 | long scm_eval_stack; |
a74145b8 | 1755 | |
92c2555f | 1756 | scm_t_option scm_eval_opts[] = { |
a74145b8 | 1757 | { SCM_OPTION_INTEGER, "stack", 22000, "Size of thread stacks (in machine words)." } |
33b97402 MD |
1758 | }; |
1759 | ||
92c2555f | 1760 | scm_t_option scm_debug_opts[] = { |
b7ff98dd MD |
1761 | { SCM_OPTION_BOOLEAN, "cheap", 1, |
1762 | "*Flyweight representation of the stack at traps." }, | |
1763 | { SCM_OPTION_BOOLEAN, "breakpoints", 0, "*Check for breakpoints." }, | |
1764 | { SCM_OPTION_BOOLEAN, "trace", 0, "*Trace mode." }, | |
1765 | { SCM_OPTION_BOOLEAN, "procnames", 1, | |
1766 | "Record procedure names at definition." }, | |
1767 | { SCM_OPTION_BOOLEAN, "backwards", 0, | |
1768 | "Display backtrace in anti-chronological order." }, | |
274dc5fd | 1769 | { SCM_OPTION_INTEGER, "width", 79, "Maximal width of backtrace." }, |
4e646a03 MD |
1770 | { SCM_OPTION_INTEGER, "indent", 10, "Maximal indentation in backtrace." }, |
1771 | { SCM_OPTION_INTEGER, "frames", 3, | |
b7ff98dd | 1772 | "Maximum number of tail-recursive frames in backtrace." }, |
4e646a03 MD |
1773 | { SCM_OPTION_INTEGER, "maxdepth", 1000, |
1774 | "Maximal number of stored backtrace frames." }, | |
1775 | { SCM_OPTION_INTEGER, "depth", 20, "Maximal length of printed backtrace." }, | |
11f77bfc MD |
1776 | { SCM_OPTION_BOOLEAN, "backtrace", 0, "Show backtrace on error." }, |
1777 | { SCM_OPTION_BOOLEAN, "debug", 0, "Use the debugging evaluator." }, | |
863e833b | 1778 | { SCM_OPTION_INTEGER, "stack", 20000, "Stack size limit (measured in words; 0 = no check)." }, |
d95c0b76 | 1779 | { SCM_OPTION_SCM, "show-file-name", (unsigned long)SCM_BOOL_T, "Show file names and line numbers in backtraces when not `#f'. A value of `base' displays only base names, while `#t' displays full names."} |
6dbd0af5 MD |
1780 | }; |
1781 | ||
92c2555f | 1782 | scm_t_option scm_evaluator_trap_table[] = { |
b6d75948 | 1783 | { SCM_OPTION_BOOLEAN, "traps", 0, "Enable evaluator traps." }, |
b7ff98dd MD |
1784 | { SCM_OPTION_BOOLEAN, "enter-frame", 0, "Trap when eval enters new frame." }, |
1785 | { SCM_OPTION_BOOLEAN, "apply-frame", 0, "Trap when entering apply." }, | |
d95c0b76 NJ |
1786 | { SCM_OPTION_BOOLEAN, "exit-frame", 0, "Trap when exiting eval or apply." }, |
1787 | { SCM_OPTION_SCM, "enter-frame-handler", (unsigned long)SCM_BOOL_F, "Handler for enter-frame traps." }, | |
1788 | { SCM_OPTION_SCM, "apply-frame-handler", (unsigned long)SCM_BOOL_F, "Handler for apply-frame traps." }, | |
1789 | { SCM_OPTION_SCM, "exit-frame-handler", (unsigned long)SCM_BOOL_F, "Handler for exit-frame traps." } | |
6dbd0af5 MD |
1790 | }; |
1791 | ||
a1ec6916 | 1792 | SCM_DEFINE (scm_eval_options_interface, "eval-options-interface", 0, 1, 0, |
1bbd0b84 | 1793 | (SCM setting), |
b3f26b14 MG |
1794 | "Option interface for the evaluation options. Instead of using\n" |
1795 | "this procedure directly, use the procedures @code{eval-enable},\n" | |
1796 | "@code{eval-disable}, @code{eval-set!} and @var{eval-options}.") | |
1bbd0b84 | 1797 | #define FUNC_NAME s_scm_eval_options_interface |
33b97402 MD |
1798 | { |
1799 | SCM ans; | |
1800 | SCM_DEFER_INTS; | |
1801 | ans = scm_options (setting, | |
1802 | scm_eval_opts, | |
1803 | SCM_N_EVAL_OPTIONS, | |
1bbd0b84 | 1804 | FUNC_NAME); |
a74145b8 | 1805 | scm_eval_stack = SCM_EVAL_STACK * sizeof (void *); |
33b97402 MD |
1806 | SCM_ALLOW_INTS; |
1807 | return ans; | |
1808 | } | |
1bbd0b84 | 1809 | #undef FUNC_NAME |
33b97402 | 1810 | |
a1ec6916 | 1811 | SCM_DEFINE (scm_evaluator_traps, "evaluator-traps-interface", 0, 1, 0, |
1bbd0b84 | 1812 | (SCM setting), |
b3f26b14 | 1813 | "Option interface for the evaluator trap options.") |
1bbd0b84 | 1814 | #define FUNC_NAME s_scm_evaluator_traps |
33b97402 MD |
1815 | { |
1816 | SCM ans; | |
1817 | SCM_DEFER_INTS; | |
1818 | ans = scm_options (setting, | |
1819 | scm_evaluator_trap_table, | |
1820 | SCM_N_EVALUATOR_TRAPS, | |
1bbd0b84 | 1821 | FUNC_NAME); |
33b97402 | 1822 | SCM_RESET_DEBUG_MODE; |
bfc69694 | 1823 | SCM_ALLOW_INTS; |
33b97402 MD |
1824 | return ans; |
1825 | } | |
1bbd0b84 | 1826 | #undef FUNC_NAME |
33b97402 | 1827 | |
6dbd0af5 | 1828 | SCM |
6e8d25a6 | 1829 | scm_deval_args (SCM l, SCM env, SCM proc, SCM *lloc) |
0f2d19dd | 1830 | { |
680ed4a8 | 1831 | SCM *results = lloc, res; |
904a077d | 1832 | while (SCM_CONSP (l)) |
0f2d19dd | 1833 | { |
680ed4a8 | 1834 | res = EVALCAR (l, env); |
904a077d | 1835 | |
8ea46249 | 1836 | *lloc = scm_list_1 (res); |
a23afe53 | 1837 | lloc = SCM_CDRLOC (*lloc); |
0f2d19dd JB |
1838 | l = SCM_CDR (l); |
1839 | } | |
cf7c17e9 | 1840 | #ifdef SCM_CAUTIOUS |
22a52da1 | 1841 | if (!SCM_NULLP (l)) |
904a077d | 1842 | scm_wrong_num_args (proc); |
680ed4a8 MD |
1843 | #endif |
1844 | return *results; | |
0f2d19dd JB |
1845 | } |
1846 | ||
6dbd0af5 MD |
1847 | #endif /* !DEVAL */ |
1848 | ||
1849 | ||
1850 | /* SECTION: Some local definitions for the evaluator. | |
1851 | */ | |
1852 | ||
d9d39d76 MV |
1853 | /* Update the toplevel environment frame ENV so that it refers to the |
1854 | current module. | |
1855 | */ | |
1856 | #define UPDATE_TOPLEVEL_ENV(env) \ | |
1857 | do { \ | |
1858 | SCM p = scm_current_module_lookup_closure (); \ | |
1859 | if (p != SCM_CAR(env)) \ | |
1860 | env = scm_top_level_env (p); \ | |
1861 | } while (0) | |
1862 | ||
6dbd0af5 | 1863 | #ifndef DEVAL |
01f11e02 | 1864 | #define CHECK_EQVISH(A,B) (SCM_EQ_P ((A), (B)) || (!SCM_FALSEP (scm_eqv_p ((A), (B))))) |
6dbd0af5 MD |
1865 | #endif /* DEVAL */ |
1866 | ||
399dedcc | 1867 | #define BUILTIN_RPASUBR /* Handle rpsubrs and asubrs without calling apply */ |
6dbd0af5 MD |
1868 | |
1869 | /* SECTION: This is the evaluator. Like any real monster, it has | |
1870 | * three heads. This code is compiled twice. | |
1871 | */ | |
1872 | ||
0f2d19dd | 1873 | #if 0 |
1cc91f1b | 1874 | |
0f2d19dd | 1875 | SCM |
1bbd0b84 | 1876 | scm_ceval (SCM x, SCM env) |
0f2d19dd JB |
1877 | {} |
1878 | #endif | |
1879 | #if 0 | |
1cc91f1b | 1880 | |
0f2d19dd | 1881 | SCM |
1bbd0b84 | 1882 | scm_deval (SCM x, SCM env) |
0f2d19dd JB |
1883 | {} |
1884 | #endif | |
1885 | ||
6dbd0af5 | 1886 | SCM |
1bbd0b84 | 1887 | SCM_CEVAL (SCM x, SCM env) |
0f2d19dd JB |
1888 | { |
1889 | union | |
1890 | { | |
1891 | SCM *lloc; | |
1892 | SCM arg1; | |
f8769b1d | 1893 | } t; |
86d31dfe | 1894 | SCM proc, arg2, orig_sym; |
6dbd0af5 | 1895 | #ifdef DEVAL |
92c2555f MV |
1896 | scm_t_debug_frame debug; |
1897 | scm_t_debug_info *debug_info_end; | |
1646d37b | 1898 | debug.prev = scm_last_debug_frame; |
6dbd0af5 | 1899 | debug.status = scm_debug_eframe_size; |
04b6c081 | 1900 | /* |
92c2555f | 1901 | * The debug.vect contains twice as much scm_t_debug_info frames as the |
04b6c081 MD |
1902 | * user has specified with (debug-set! frames <n>). |
1903 | * | |
1904 | * Even frames are eval frames, odd frames are apply frames. | |
1905 | */ | |
92c2555f | 1906 | debug.vect = (scm_t_debug_info *) alloca (scm_debug_eframe_size |
c0ab1b8d JB |
1907 | * sizeof (debug.vect[0])); |
1908 | debug.info = debug.vect; | |
1909 | debug_info_end = debug.vect + scm_debug_eframe_size; | |
1910 | scm_last_debug_frame = &debug; | |
6dbd0af5 | 1911 | #endif |
b7ff98dd | 1912 | #ifdef EVAL_STACK_CHECKING |
6f13f9cb MD |
1913 | if (scm_stack_checking_enabled_p |
1914 | && SCM_STACK_OVERFLOW_P ((SCM_STACKITEM *) &proc)) | |
6dbd0af5 | 1915 | { |
b7ff98dd | 1916 | #ifdef DEVAL |
6dbd0af5 MD |
1917 | debug.info->e.exp = x; |
1918 | debug.info->e.env = env; | |
b7ff98dd | 1919 | #endif |
6dbd0af5 MD |
1920 | scm_report_stack_overflow (); |
1921 | } | |
1922 | #endif | |
1923 | #ifdef DEVAL | |
1924 | goto start; | |
1925 | #endif | |
1926 | loopnoap: | |
1927 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
1928 | loop: | |
1929 | #ifdef DEVAL | |
b7ff98dd MD |
1930 | SCM_CLEAR_ARGSREADY (debug); |
1931 | if (SCM_OVERFLOWP (debug)) | |
6dbd0af5 | 1932 | --debug.info; |
04b6c081 MD |
1933 | /* |
1934 | * In theory, this should be the only place where it is necessary to | |
1935 | * check for space in debug.vect since both eval frames and | |
1936 | * available space are even. | |
1937 | * | |
1938 | * For this to be the case, however, it is necessary that primitive | |
1939 | * special forms which jump back to `loop', `begin' or some similar | |
1940 | * label call PREP_APPLY. A convenient way to do this is to jump to | |
1941 | * `loopnoap' or `cdrxnoap'. | |
1942 | */ | |
c0ab1b8d | 1943 | else if (++debug.info >= debug_info_end) |
6dbd0af5 | 1944 | { |
b7ff98dd | 1945 | SCM_SET_OVERFLOW (debug); |
6dbd0af5 MD |
1946 | debug.info -= 2; |
1947 | } | |
1948 | start: | |
1949 | debug.info->e.exp = x; | |
1950 | debug.info->e.env = env; | |
b6d75948 | 1951 | if (CHECK_ENTRY && SCM_TRAPS_P) |
b7ff98dd | 1952 | if (SCM_ENTER_FRAME_P || (SCM_BREAKPOINTS_P && SRCBRKP (x))) |
6dbd0af5 | 1953 | { |
156dcb09 | 1954 | SCM tail = SCM_BOOL(SCM_TAILRECP (debug)); |
b7ff98dd | 1955 | SCM_SET_TAILREC (debug); |
b7ff98dd | 1956 | if (SCM_CHEAPTRAPS_P) |
c0ab1b8d | 1957 | t.arg1 = scm_make_debugobj (&debug); |
6dbd0af5 MD |
1958 | else |
1959 | { | |
5f144b10 GH |
1960 | int first; |
1961 | SCM val = scm_make_continuation (&first); | |
1962 | ||
1963 | if (first) | |
1964 | t.arg1 = val; | |
1965 | else | |
6dbd0af5 | 1966 | { |
5f144b10 | 1967 | x = val; |
6dbd0af5 | 1968 | if (SCM_IMP (x)) |
ddea3325 | 1969 | RETURN (x); |
6dbd0af5 MD |
1970 | else |
1971 | /* This gives the possibility for the debugger to | |
1972 | modify the source expression before evaluation. */ | |
1973 | goto dispatch; | |
1974 | } | |
1975 | } | |
d95c0b76 NJ |
1976 | SCM_TRAPS_P = 0; |
1977 | scm_call_4 (SCM_ENTER_FRAME_HDLR, | |
1978 | scm_sym_enter_frame, | |
1979 | t.arg1, | |
1980 | tail, | |
1981 | scm_unmemocopy (x, env)); | |
1982 | SCM_TRAPS_P = 1; | |
6dbd0af5 | 1983 | } |
6dbd0af5 | 1984 | #endif |
e3173f93 | 1985 | #if defined (USE_THREADS) || defined (DEVAL) |
f8769b1d | 1986 | dispatch: |
e3173f93 | 1987 | #endif |
9cb5124f | 1988 | SCM_TICK; |
0f2d19dd JB |
1989 | switch (SCM_TYP7 (x)) |
1990 | { | |
28b06554 | 1991 | case scm_tc7_symbol: |
0f2d19dd JB |
1992 | /* Only happens when called at top level. |
1993 | */ | |
1994 | x = scm_cons (x, SCM_UNDEFINED); | |
ddea3325 | 1995 | RETURN (*scm_lookupcar (x, env, 1)); |
0f2d19dd | 1996 | |
c209c88e | 1997 | case SCM_BIT8(SCM_IM_AND): |
0f2d19dd | 1998 | x = SCM_CDR (x); |
302c12b4 DH |
1999 | while (!SCM_NULLP (SCM_CDR (x))) |
2000 | { | |
2001 | if (SCM_FALSEP (EVALCAR (x, env))) | |
0f2d19dd | 2002 | RETURN (SCM_BOOL_F); |
302c12b4 DH |
2003 | else |
2004 | x = SCM_CDR (x); | |
2005 | } | |
6dbd0af5 | 2006 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
2007 | goto carloop; |
2008 | ||
c209c88e | 2009 | case SCM_BIT8(SCM_IM_BEGIN): |
b8113bc8 MV |
2010 | if (SCM_NULLP (SCM_CDR (x))) |
2011 | RETURN (SCM_UNSPECIFIED); | |
2012 | ||
d9d39d76 MV |
2013 | /* (currently unused) |
2014 | cdrxnoap: */ | |
6dbd0af5 | 2015 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
d9d39d76 MV |
2016 | /* (currently unused) |
2017 | cdrxbegin: */ | |
0f2d19dd JB |
2018 | x = SCM_CDR (x); |
2019 | ||
2020 | begin: | |
4163eb72 MV |
2021 | /* If we are on toplevel with a lookup closure, we need to sync |
2022 | with the current module. */ | |
22a52da1 | 2023 | if (SCM_CONSP (env) && !SCM_CONSP (SCM_CAR (env))) |
4163eb72 | 2024 | { |
d9d39d76 | 2025 | UPDATE_TOPLEVEL_ENV (env); |
302c12b4 | 2026 | while (!SCM_NULLP (SCM_CDR (x))) |
4163eb72 | 2027 | { |
5280aaca | 2028 | EVALCAR (x, env); |
d9d39d76 | 2029 | UPDATE_TOPLEVEL_ENV (env); |
302c12b4 | 2030 | x = SCM_CDR (x); |
4163eb72 | 2031 | } |
5280aaca | 2032 | goto carloop; |
4163eb72 MV |
2033 | } |
2034 | else | |
5280aaca MV |
2035 | goto nontoplevel_begin; |
2036 | ||
2037 | nontoplevel_cdrxnoap: | |
2038 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2039 | nontoplevel_cdrxbegin: | |
2040 | x = SCM_CDR (x); | |
2041 | nontoplevel_begin: | |
302c12b4 | 2042 | while (!SCM_NULLP (SCM_CDR (x))) |
0f2d19dd | 2043 | { |
5280aaca | 2044 | if (SCM_IMP (SCM_CAR (x))) |
26d5b9b4 | 2045 | { |
5280aaca | 2046 | if (SCM_ISYMP (SCM_CAR (x))) |
26d5b9b4 | 2047 | { |
5280aaca MV |
2048 | x = scm_m_expand_body (x, env); |
2049 | goto nontoplevel_begin; | |
26d5b9b4 | 2050 | } |
4163eb72 | 2051 | else |
17fa3fcf | 2052 | SCM_VALIDATE_NON_EMPTY_COMBINATION (SCM_CAR (x)); |
26d5b9b4 | 2053 | } |
5280aaca MV |
2054 | else |
2055 | SCM_CEVAL (SCM_CAR (x), env); | |
302c12b4 | 2056 | x = SCM_CDR (x); |
0f2d19dd | 2057 | } |
5280aaca | 2058 | |
0f2d19dd | 2059 | carloop: /* scm_eval car of last form in list */ |
8c494e99 | 2060 | if (SCM_IMP (SCM_CAR (x))) |
0f2d19dd JB |
2061 | { |
2062 | x = SCM_CAR (x); | |
ddea3325 | 2063 | RETURN (SCM_EVALIM (x, env)); |
0f2d19dd JB |
2064 | } |
2065 | ||
2066 | if (SCM_SYMBOLP (SCM_CAR (x))) | |
ddea3325 | 2067 | RETURN (*scm_lookupcar (x, env, 1)); |
0f2d19dd JB |
2068 | |
2069 | x = SCM_CAR (x); | |
2070 | goto loop; /* tail recurse */ | |
2071 | ||
2072 | ||
c209c88e | 2073 | case SCM_BIT8(SCM_IM_CASE): |
0f2d19dd JB |
2074 | x = SCM_CDR (x); |
2075 | t.arg1 = EVALCAR (x, env); | |
2076 | while (SCM_NIMP (x = SCM_CDR (x))) | |
2077 | { | |
2078 | proc = SCM_CAR (x); | |
cf498326 | 2079 | if (SCM_EQ_P (scm_sym_else, SCM_CAR (proc))) |
0f2d19dd JB |
2080 | { |
2081 | x = SCM_CDR (proc); | |
6dbd0af5 | 2082 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
2083 | goto begin; |
2084 | } | |
2085 | proc = SCM_CAR (proc); | |
2086 | while (SCM_NIMP (proc)) | |
2087 | { | |
2088 | if (CHECK_EQVISH (SCM_CAR (proc), t.arg1)) | |
2089 | { | |
8ea46249 | 2090 | x = SCM_CDAR (x); |
6dbd0af5 | 2091 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
2092 | goto begin; |
2093 | } | |
2094 | proc = SCM_CDR (proc); | |
2095 | } | |
2096 | } | |
ddea3325 | 2097 | RETURN (SCM_UNSPECIFIED); |
0f2d19dd JB |
2098 | |
2099 | ||
8ea46249 DH |
2100 | case SCM_BIT8 (SCM_IM_COND): |
2101 | x = SCM_CDR (x); | |
2102 | while (!SCM_NULLP (x)) | |
0f2d19dd JB |
2103 | { |
2104 | proc = SCM_CAR (x); | |
8ea46249 DH |
2105 | if (SCM_EQ_P (SCM_CAR (proc), scm_sym_else)) |
2106 | { | |
2107 | x = SCM_CDR (proc); | |
2108 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2109 | goto begin; | |
2110 | } | |
0f2d19dd | 2111 | t.arg1 = EVALCAR (proc, env); |
01f11e02 | 2112 | if (!SCM_FALSEP (t.arg1)) |
0f2d19dd JB |
2113 | { |
2114 | x = SCM_CDR (proc); | |
22a52da1 | 2115 | if (SCM_NULLP (x)) |
ddea3325 | 2116 | RETURN (t.arg1); |
22a52da1 | 2117 | if (!SCM_EQ_P (scm_sym_arrow, SCM_CAR (x))) |
6dbd0af5 MD |
2118 | { |
2119 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2120 | goto begin; | |
2121 | } | |
0f2d19dd JB |
2122 | proc = SCM_CDR (x); |
2123 | proc = EVALCAR (proc, env); | |
2124 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
8ea46249 | 2125 | PREP_APPLY (proc, scm_list_1 (t.arg1)); |
6dbd0af5 | 2126 | ENTER_APPLY; |
a820af98 | 2127 | if (SCM_CLOSUREP(proc) && scm_badformalsp (proc, 1)) |
e37a4fba | 2128 | goto umwrongnumargs; |
0f2d19dd JB |
2129 | goto evap1; |
2130 | } | |
8ea46249 | 2131 | x = SCM_CDR (x); |
0f2d19dd | 2132 | } |
ddea3325 | 2133 | RETURN (SCM_UNSPECIFIED); |
0f2d19dd JB |
2134 | |
2135 | ||
c209c88e | 2136 | case SCM_BIT8(SCM_IM_DO): |
0f2d19dd | 2137 | x = SCM_CDR (x); |
8ea46249 | 2138 | proc = SCM_CADR (x); /* inits */ |
0f2d19dd JB |
2139 | t.arg1 = SCM_EOL; /* values */ |
2140 | while (SCM_NIMP (proc)) | |
2141 | { | |
2142 | t.arg1 = scm_cons (EVALCAR (proc, env), t.arg1); | |
2143 | proc = SCM_CDR (proc); | |
2144 | } | |
e2806c10 | 2145 | env = EXTEND_ENV (SCM_CAR (x), t.arg1, env); |
8ea46249 | 2146 | x = SCM_CDDR (x); |
0f2d19dd JB |
2147 | while (proc = SCM_CAR (x), SCM_FALSEP (EVALCAR (proc, env))) |
2148 | { | |
f3d2630a | 2149 | for (proc = SCM_CADR (x); SCM_NIMP (proc); proc = SCM_CDR (proc)) |
0f2d19dd JB |
2150 | { |
2151 | t.arg1 = SCM_CAR (proc); /* body */ | |
2152 | SIDEVAL (t.arg1, env); | |
2153 | } | |
f3d2630a MD |
2154 | for (t.arg1 = SCM_EOL, proc = SCM_CDDR (x); |
2155 | SCM_NIMP (proc); | |
2156 | proc = SCM_CDR (proc)) | |
0f2d19dd | 2157 | t.arg1 = scm_cons (EVALCAR (proc, env), t.arg1); /* steps */ |
8ea46249 | 2158 | env = EXTEND_ENV (SCM_CAAR (env), t.arg1, SCM_CDR (env)); |
0f2d19dd JB |
2159 | } |
2160 | x = SCM_CDR (proc); | |
2161 | if (SCM_NULLP (x)) | |
6dbd0af5 MD |
2162 | RETURN (SCM_UNSPECIFIED); |
2163 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
5280aaca | 2164 | goto nontoplevel_begin; |
0f2d19dd JB |
2165 | |
2166 | ||
c209c88e | 2167 | case SCM_BIT8(SCM_IM_IF): |
0f2d19dd | 2168 | x = SCM_CDR (x); |
01f11e02 | 2169 | if (!SCM_FALSEP (EVALCAR (x, env))) |
0f2d19dd | 2170 | x = SCM_CDR (x); |
8ea46249 | 2171 | else if (SCM_IMP (x = SCM_CDDR (x))) |
ddea3325 | 2172 | RETURN (SCM_UNSPECIFIED); |
6dbd0af5 | 2173 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
2174 | goto carloop; |
2175 | ||
2176 | ||
c209c88e | 2177 | case SCM_BIT8(SCM_IM_LET): |
0f2d19dd | 2178 | x = SCM_CDR (x); |
8ea46249 | 2179 | proc = SCM_CADR (x); |
0f2d19dd JB |
2180 | t.arg1 = SCM_EOL; |
2181 | do | |
2182 | { | |
2183 | t.arg1 = scm_cons (EVALCAR (proc, env), t.arg1); | |
2184 | } | |
2185 | while (SCM_NIMP (proc = SCM_CDR (proc))); | |
e2806c10 | 2186 | env = EXTEND_ENV (SCM_CAR (x), t.arg1, env); |
0f2d19dd | 2187 | x = SCM_CDR (x); |
5280aaca | 2188 | goto nontoplevel_cdrxnoap; |
0f2d19dd JB |
2189 | |
2190 | ||
c209c88e | 2191 | case SCM_BIT8(SCM_IM_LETREC): |
0f2d19dd | 2192 | x = SCM_CDR (x); |
e2806c10 | 2193 | env = EXTEND_ENV (SCM_CAR (x), scm_undefineds, env); |
0f2d19dd JB |
2194 | x = SCM_CDR (x); |
2195 | proc = SCM_CAR (x); | |
2196 | t.arg1 = SCM_EOL; | |
2197 | do | |
2198 | { | |
2199 | t.arg1 = scm_cons (EVALCAR (proc, env), t.arg1); | |
2200 | } | |
2201 | while (SCM_NIMP (proc = SCM_CDR (proc))); | |
a23afe53 | 2202 | SCM_SETCDR (SCM_CAR (env), t.arg1); |
5280aaca | 2203 | goto nontoplevel_cdrxnoap; |
0f2d19dd JB |
2204 | |
2205 | ||
c209c88e | 2206 | case SCM_BIT8(SCM_IM_LETSTAR): |
0f2d19dd | 2207 | x = SCM_CDR (x); |
302c12b4 DH |
2208 | { |
2209 | SCM bindings = SCM_CAR (x); | |
2210 | if (SCM_NULLP (bindings)) | |
e2806c10 | 2211 | env = EXTEND_ENV (SCM_EOL, SCM_EOL, env); |
302c12b4 DH |
2212 | else |
2213 | { | |
2214 | do | |
2215 | { | |
2216 | SCM name = SCM_CAR (bindings); | |
2217 | SCM init = SCM_CDR (bindings); | |
2218 | env = EXTEND_ENV (name, EVALCAR (init, env), env); | |
2219 | bindings = SCM_CDR (init); | |
2220 | } | |
2221 | while (!SCM_NULLP (bindings)); | |
2222 | } | |
2223 | } | |
5280aaca | 2224 | goto nontoplevel_cdrxnoap; |
0f2d19dd | 2225 | |
302c12b4 | 2226 | |
c209c88e | 2227 | case SCM_BIT8(SCM_IM_OR): |
0f2d19dd | 2228 | x = SCM_CDR (x); |
302c12b4 | 2229 | while (!SCM_NULLP (SCM_CDR (x))) |
0f2d19dd | 2230 | { |
302c12b4 DH |
2231 | SCM val = EVALCAR (x, env); |
2232 | if (!SCM_FALSEP (val)) | |
2233 | RETURN (val); | |
2234 | else | |
2235 | x = SCM_CDR (x); | |
0f2d19dd | 2236 | } |
6dbd0af5 | 2237 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
2238 | goto carloop; |
2239 | ||
2240 | ||
c209c88e | 2241 | case SCM_BIT8(SCM_IM_LAMBDA): |
0f2d19dd JB |
2242 | RETURN (scm_closure (SCM_CDR (x), env)); |
2243 | ||
2244 | ||
c209c88e | 2245 | case SCM_BIT8(SCM_IM_QUOTE): |
8ea46249 | 2246 | RETURN (SCM_CADR (x)); |
0f2d19dd JB |
2247 | |
2248 | ||
c209c88e | 2249 | case SCM_BIT8(SCM_IM_SET_X): |
0f2d19dd JB |
2250 | x = SCM_CDR (x); |
2251 | proc = SCM_CAR (x); | |
3201d763 | 2252 | switch (SCM_ITAG3 (proc)) |
0f2d19dd | 2253 | { |
3201d763 | 2254 | case scm_tc3_cons: |
d22a0ea1 MV |
2255 | if (SCM_VARIABLEP (proc)) |
2256 | t.lloc = SCM_VARIABLE_LOC (proc); | |
2257 | else | |
2258 | t.lloc = scm_lookupcar (x, env, 1); | |
0f2d19dd | 2259 | break; |
0f2d19dd | 2260 | #ifdef MEMOIZE_LOCALS |
3201d763 | 2261 | case scm_tc3_imm24: |
0f2d19dd JB |
2262 | t.lloc = scm_ilookup (proc, env); |
2263 | break; | |
2264 | #endif | |
2265 | } | |
2266 | x = SCM_CDR (x); | |
2267 | *t.lloc = EVALCAR (x, env); | |
0f2d19dd JB |
2268 | #ifdef SICP |
2269 | RETURN (*t.lloc); | |
2270 | #else | |
2271 | RETURN (SCM_UNSPECIFIED); | |
2272 | #endif | |
2273 | ||
2274 | ||
c209c88e | 2275 | case SCM_BIT8(SCM_IM_DEFINE): /* only for internal defines */ |
26d5b9b4 MD |
2276 | scm_misc_error (NULL, "Bad define placement", SCM_EOL); |
2277 | ||
0f2d19dd | 2278 | /* new syntactic forms go here. */ |
c209c88e | 2279 | case SCM_BIT8(SCM_MAKISYM (0)): |
0f2d19dd JB |
2280 | proc = SCM_CAR (x); |
2281 | SCM_ASRTGO (SCM_ISYMP (proc), badfun); | |
2282 | switch SCM_ISYMNUM (proc) | |
2283 | { | |
0f2d19dd JB |
2284 | case (SCM_ISYMNUM (SCM_IM_APPLY)): |
2285 | proc = SCM_CDR (x); | |
2286 | proc = EVALCAR (proc, env); | |
2287 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
2288 | if (SCM_CLOSUREP (proc)) | |
2289 | { | |
1609038c | 2290 | SCM argl, tl; |
6dbd0af5 | 2291 | PREP_APPLY (proc, SCM_EOL); |
8ea46249 | 2292 | t.arg1 = SCM_CDDR (x); |
0f2d19dd | 2293 | t.arg1 = EVALCAR (t.arg1, env); |
a513ead3 MV |
2294 | apply_closure: |
2295 | /* Go here to tail-call a closure. PROC is the closure | |
2296 | and T.ARG1 is the list of arguments. Do not forget to | |
2297 | call PREP_APPLY. */ | |
6dbd0af5 MD |
2298 | #ifdef DEVAL |
2299 | debug.info->a.args = t.arg1; | |
2300 | #endif | |
cf7c17e9 | 2301 | #ifndef SCM_RECKLESS |
726d810a | 2302 | if (scm_badargsp (SCM_CLOSURE_FORMALS (proc), t.arg1)) |
0f2d19dd JB |
2303 | goto wrongnumargs; |
2304 | #endif | |
c79450dd | 2305 | ENTER_APPLY; |
1609038c MD |
2306 | /* Copy argument list */ |
2307 | if (SCM_IMP (t.arg1)) | |
2308 | argl = t.arg1; | |
2309 | else | |
2310 | { | |
2311 | argl = tl = scm_cons (SCM_CAR (t.arg1), SCM_UNSPECIFIED); | |
2312 | while (SCM_NIMP (t.arg1 = SCM_CDR (t.arg1)) | |
2313 | && SCM_CONSP (t.arg1)) | |
2314 | { | |
2315 | SCM_SETCDR (tl, scm_cons (SCM_CAR (t.arg1), | |
2316 | SCM_UNSPECIFIED)); | |
2317 | tl = SCM_CDR (tl); | |
2318 | } | |
2319 | SCM_SETCDR (tl, t.arg1); | |
2320 | } | |
2321 | ||
726d810a | 2322 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), argl, SCM_ENV (proc)); |
0f2d19dd | 2323 | x = SCM_CODE (proc); |
5280aaca | 2324 | goto nontoplevel_cdrxbegin; |
0f2d19dd | 2325 | } |
81123e6d | 2326 | proc = scm_f_apply; |
0f2d19dd JB |
2327 | goto evapply; |
2328 | ||
2329 | case (SCM_ISYMNUM (SCM_IM_CONT)): | |
5f144b10 GH |
2330 | { |
2331 | int first; | |
2332 | SCM val = scm_make_continuation (&first); | |
2333 | ||
2334 | if (first) | |
2335 | t.arg1 = val; | |
2336 | else | |
2337 | RETURN (val); | |
2338 | } | |
0f2d19dd | 2339 | proc = SCM_CDR (x); |
302c12b4 | 2340 | proc = scm_eval_car (proc, env); |
0f2d19dd | 2341 | SCM_ASRTGO (SCM_NIMP (proc), badfun); |
8ea46249 | 2342 | PREP_APPLY (proc, scm_list_1 (t.arg1)); |
6dbd0af5 | 2343 | ENTER_APPLY; |
a820af98 | 2344 | if (SCM_CLOSUREP(proc) && scm_badformalsp (proc, 1)) |
e37a4fba | 2345 | goto umwrongnumargs; |
0f2d19dd JB |
2346 | goto evap1; |
2347 | ||
a570e93a | 2348 | case (SCM_ISYMNUM (SCM_IM_DELAY)): |
ddea3325 | 2349 | RETURN (scm_makprom (scm_closure (SCM_CDR (x), env))); |
a570e93a | 2350 | |
89efbff4 | 2351 | case (SCM_ISYMNUM (SCM_IM_DISPATCH)): |
195847fa MD |
2352 | proc = SCM_CADR (x); /* unevaluated operands */ |
2353 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2354 | if (SCM_IMP (proc)) | |
2355 | arg2 = *scm_ilookup (proc, env); | |
01f11e02 | 2356 | else if (!SCM_CONSP (proc)) |
195847fa | 2357 | { |
904a077d MV |
2358 | if (SCM_VARIABLEP (proc)) |
2359 | arg2 = SCM_VARIABLE_REF (proc); | |
195847fa MD |
2360 | else |
2361 | arg2 = *scm_lookupcar (SCM_CDR (x), env, 1); | |
2362 | } | |
2363 | else | |
2364 | { | |
8ea46249 | 2365 | arg2 = scm_list_1 (EVALCAR (proc, env)); |
195847fa MD |
2366 | t.lloc = SCM_CDRLOC (arg2); |
2367 | while (SCM_NIMP (proc = SCM_CDR (proc))) | |
2368 | { | |
8ea46249 | 2369 | *t.lloc = scm_list_1 (EVALCAR (proc, env)); |
195847fa MD |
2370 | t.lloc = SCM_CDRLOC (*t.lloc); |
2371 | } | |
2372 | } | |
2373 | ||
2374 | type_dispatch: | |
61364ba6 MD |
2375 | /* The type dispatch code is duplicated here |
2376 | * (c.f. objects.c:scm_mcache_compute_cmethod) since that | |
2377 | * cuts down execution time for type dispatch to 50%. | |
2378 | */ | |
2379 | { | |
c014a02e | 2380 | long i, n, end, mask; |
61364ba6 MD |
2381 | SCM z = SCM_CDDR (x); |
2382 | n = SCM_INUM (SCM_CAR (z)); /* maximum number of specializers */ | |
2383 | proc = SCM_CADR (z); | |
2384 | ||
2385 | if (SCM_NIMP (proc)) | |
2386 | { | |
2387 | /* Prepare for linear search */ | |
2388 | mask = -1; | |
2389 | i = 0; | |
b5c2579a | 2390 | end = SCM_VECTOR_LENGTH (proc); |
61364ba6 MD |
2391 | } |
2392 | else | |
2393 | { | |
2394 | /* Compute a hash value */ | |
c014a02e ML |
2395 | long hashset = SCM_INUM (proc); |
2396 | long j = n; | |
729dbac3 DH |
2397 | z = SCM_CDDR (z); |
2398 | mask = SCM_INUM (SCM_CAR (z)); | |
61364ba6 MD |
2399 | proc = SCM_CADR (z); |
2400 | i = 0; | |
2401 | t.arg1 = arg2; | |
2402 | if (SCM_NIMP (t.arg1)) | |
2403 | do | |
2404 | { | |
d8c40b9f DH |
2405 | i += SCM_STRUCT_DATA (scm_class_of (SCM_CAR (t.arg1))) |
2406 | [scm_si_hashsets + hashset]; | |
61364ba6 MD |
2407 | t.arg1 = SCM_CDR (t.arg1); |
2408 | } | |
4ea6a431 | 2409 | while (j-- && SCM_NIMP (t.arg1)); |
61364ba6 MD |
2410 | i &= mask; |
2411 | end = i; | |
2412 | } | |
2413 | ||
2414 | /* Search for match */ | |
2415 | do | |
2416 | { | |
c014a02e | 2417 | long j = n; |
61364ba6 MD |
2418 | z = SCM_VELTS (proc)[i]; |
2419 | t.arg1 = arg2; /* list of arguments */ | |
2420 | if (SCM_NIMP (t.arg1)) | |
2421 | do | |
2422 | { | |
2423 | /* More arguments than specifiers => CLASS != ENV */ | |
cf498326 | 2424 | if (! SCM_EQ_P (scm_class_of (SCM_CAR (t.arg1)), SCM_CAR (z))) |
61364ba6 MD |
2425 | goto next_method; |
2426 | t.arg1 = SCM_CDR (t.arg1); | |
2427 | z = SCM_CDR (z); | |
2428 | } | |
4ea6a431 | 2429 | while (j-- && SCM_NIMP (t.arg1)); |
61364ba6 MD |
2430 | /* Fewer arguments than specifiers => CAR != ENV */ |
2431 | if (!(SCM_IMP (SCM_CAR (z)) || SCM_CONSP (SCM_CAR (z)))) | |
2432 | goto next_method; | |
2433 | apply_cmethod: | |
2434 | env = EXTEND_ENV (SCM_CAR (SCM_CMETHOD_CODE (z)), | |
2435 | arg2, | |
2436 | SCM_CMETHOD_ENV (z)); | |
2437 | x = SCM_CMETHOD_CODE (z); | |
5280aaca | 2438 | goto nontoplevel_cdrxbegin; |
61364ba6 MD |
2439 | next_method: |
2440 | i = (i + 1) & mask; | |
2441 | } while (i != end); | |
2442 | ||
2443 | z = scm_memoize_method (x, arg2); | |
2444 | goto apply_cmethod; | |
2445 | } | |
73b64342 | 2446 | |
ca4be6ea MD |
2447 | case (SCM_ISYMNUM (SCM_IM_SLOT_REF)): |
2448 | x = SCM_CDR (x); | |
2449 | t.arg1 = EVALCAR (x, env); | |
ddea3325 | 2450 | RETURN (SCM_PACK (SCM_STRUCT_DATA (t.arg1) [SCM_INUM (SCM_CADR (x))])); |
ca4be6ea MD |
2451 | |
2452 | case (SCM_ISYMNUM (SCM_IM_SLOT_SET_X)): | |
2453 | x = SCM_CDR (x); | |
2454 | t.arg1 = EVALCAR (x, env); | |
2455 | x = SCM_CDR (x); | |
2456 | proc = SCM_CDR (x); | |
d8c40b9f DH |
2457 | SCM_STRUCT_DATA (t.arg1) [SCM_INUM (SCM_CAR (x))] |
2458 | = SCM_UNPACK (EVALCAR (proc, env)); | |
ddea3325 | 2459 | RETURN (SCM_UNSPECIFIED); |
ca4be6ea | 2460 | |
73b64342 MD |
2461 | case (SCM_ISYMNUM (SCM_IM_NIL_COND)): |
2462 | proc = SCM_CDR (x); | |
2463 | while (SCM_NIMP (x = SCM_CDR (proc))) | |
2464 | { | |
2465 | if (!(SCM_FALSEP (t.arg1 = EVALCAR (proc, env)) | |
3201d763 | 2466 | || SCM_EQ_P (t.arg1, scm_lisp_nil))) |
73b64342 | 2467 | { |
cf498326 | 2468 | if (SCM_EQ_P (SCM_CAR (x), SCM_UNSPECIFIED)) |
73b64342 MD |
2469 | RETURN (t.arg1); |
2470 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2471 | goto carloop; | |
2472 | } | |
2473 | proc = SCM_CDR (x); | |
2474 | } | |
2475 | x = proc; | |
2476 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2477 | goto carloop; | |
2478 | ||
2479 | case (SCM_ISYMNUM (SCM_IM_NIL_IFY)): | |
2480 | x = SCM_CDR (x); | |
2481 | RETURN ((SCM_FALSEP (proc = EVALCAR (x, env)) || SCM_NULLP (proc)) | |
ddea3325 DH |
2482 | ? scm_lisp_nil |
2483 | : proc); | |
73b64342 MD |
2484 | |
2485 | case (SCM_ISYMNUM (SCM_IM_T_IFY)): | |
2486 | x = SCM_CDR (x); | |
ddea3325 | 2487 | RETURN (!SCM_FALSEP (EVALCAR (x, env)) ? scm_lisp_t : scm_lisp_nil); |
73b64342 MD |
2488 | |
2489 | case (SCM_ISYMNUM (SCM_IM_0_COND)): | |
2490 | proc = SCM_CDR (x); | |
2491 | while (SCM_NIMP (x = SCM_CDR (proc))) | |
2492 | { | |
2493 | if (!(SCM_FALSEP (t.arg1 = EVALCAR (proc, env)) | |
3201d763 | 2494 | || SCM_EQ_P (t.arg1, SCM_INUM0))) |
73b64342 | 2495 | { |
cf498326 | 2496 | if (SCM_EQ_P (SCM_CAR (x), SCM_UNSPECIFIED)) |
73b64342 MD |
2497 | RETURN (t.arg1); |
2498 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2499 | goto carloop; | |
2500 | } | |
2501 | proc = SCM_CDR (x); | |
2502 | } | |
2503 | x = proc; | |
2504 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2505 | goto carloop; | |
2506 | ||
2507 | case (SCM_ISYMNUM (SCM_IM_0_IFY)): | |
2508 | x = SCM_CDR (x); | |
2509 | RETURN (SCM_FALSEP (proc = EVALCAR (x, env)) | |
2510 | ? SCM_INUM0 | |
ddea3325 | 2511 | : proc); |
73b64342 MD |
2512 | |
2513 | case (SCM_ISYMNUM (SCM_IM_1_IFY)): | |
2514 | x = SCM_CDR (x); | |
01f11e02 | 2515 | RETURN (!SCM_FALSEP (EVALCAR (x, env)) |
73b64342 | 2516 | ? SCM_MAKINUM (1) |
ddea3325 | 2517 | : SCM_INUM0); |
73b64342 MD |
2518 | |
2519 | case (SCM_ISYMNUM (SCM_IM_BIND)): | |
2e171178 MV |
2520 | { |
2521 | SCM vars, exps, vals; | |
73b64342 | 2522 | |
2e171178 MV |
2523 | x = SCM_CDR (x); |
2524 | vars = SCM_CAAR (x); | |
2525 | exps = SCM_CDAR (x); | |
2526 | ||
2527 | vals = SCM_EOL; | |
2528 | ||
2529 | while (SCM_NIMP (exps)) | |
2530 | { | |
2531 | vals = scm_cons (EVALCAR (exps, env), vals); | |
2532 | exps = SCM_CDR (exps); | |
2533 | } | |
2534 | ||
2535 | scm_swap_bindings (vars, vals); | |
2536 | scm_dynwinds = scm_acons (vars, vals, scm_dynwinds); | |
89efbff4 | 2537 | |
2e171178 MV |
2538 | arg2 = x = SCM_CDR (x); |
2539 | while (!SCM_NULLP (arg2 = SCM_CDR (arg2))) | |
2540 | { | |
2541 | SIDEVAL (SCM_CAR (x), env); | |
2542 | x = arg2; | |
2543 | } | |
2544 | proc = EVALCAR (x, env); | |
73b64342 | 2545 | |
2e171178 MV |
2546 | scm_dynwinds = SCM_CDR (scm_dynwinds); |
2547 | scm_swap_bindings (vars, vals); | |
73b64342 | 2548 | |
ddea3325 | 2549 | RETURN (proc); |
2e171178 | 2550 | } |
73b64342 | 2551 | |
a513ead3 MV |
2552 | case (SCM_ISYMNUM (SCM_IM_CALL_WITH_VALUES)): |
2553 | { | |
2554 | proc = SCM_CDR (x); | |
2555 | x = EVALCAR (proc, env); | |
2556 | proc = SCM_CDR (proc); | |
2557 | proc = EVALCAR (proc, env); | |
2558 | t.arg1 = SCM_APPLY (x, SCM_EOL, SCM_EOL); | |
2559 | if (SCM_VALUESP (t.arg1)) | |
2560 | t.arg1 = scm_struct_ref (t.arg1, SCM_INUM0); | |
2561 | else | |
8ea46249 | 2562 | t.arg1 = scm_list_1 (t.arg1); |
a513ead3 MV |
2563 | if (SCM_CLOSUREP (proc)) |
2564 | { | |
2565 | PREP_APPLY (proc, t.arg1); | |
2566 | goto apply_closure; | |
2567 | } | |
2568 | return SCM_APPLY (proc, t.arg1, SCM_EOL); | |
2569 | } | |
2570 | ||
0f2d19dd JB |
2571 | default: |
2572 | goto badfun; | |
2573 | } | |
2574 | ||
2575 | default: | |
2576 | proc = x; | |
2577 | badfun: | |
f5bf2977 | 2578 | /* scm_everr (x, env,...) */ |
1afff620 | 2579 | scm_misc_error (NULL, "Wrong type to apply: ~S", scm_list_1 (proc)); |
0f2d19dd JB |
2580 | case scm_tc7_vector: |
2581 | case scm_tc7_wvect: | |
afe5177e | 2582 | #ifdef HAVE_ARRAYS |
0f2d19dd JB |
2583 | case scm_tc7_bvect: |
2584 | case scm_tc7_byvect: | |
2585 | case scm_tc7_svect: | |
2586 | case scm_tc7_ivect: | |
2587 | case scm_tc7_uvect: | |
2588 | case scm_tc7_fvect: | |
2589 | case scm_tc7_dvect: | |
2590 | case scm_tc7_cvect: | |
5c11cc9d | 2591 | #ifdef HAVE_LONG_LONGS |
0f2d19dd | 2592 | case scm_tc7_llvect: |
afe5177e | 2593 | #endif |
0f2d19dd JB |
2594 | #endif |
2595 | case scm_tc7_string: | |
0f2d19dd JB |
2596 | case scm_tc7_smob: |
2597 | case scm_tcs_closures: | |
224822be | 2598 | case scm_tc7_cclo: |
89efbff4 | 2599 | case scm_tc7_pws: |
0f2d19dd | 2600 | case scm_tcs_subrs: |
904a077d | 2601 | case scm_tcs_struct: |
0f2d19dd JB |
2602 | RETURN (x); |
2603 | ||
d22a0ea1 | 2604 | case scm_tc7_variable: |
a130e982 | 2605 | RETURN (SCM_VARIABLE_REF(x)); |
d22a0ea1 | 2606 | |
0f2d19dd | 2607 | #ifdef MEMOIZE_LOCALS |
c209c88e | 2608 | case SCM_BIT8(SCM_ILOC00): |
0f2d19dd JB |
2609 | proc = *scm_ilookup (SCM_CAR (x), env); |
2610 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
cf7c17e9 JB |
2611 | #ifndef SCM_RECKLESS |
2612 | #ifdef SCM_CAUTIOUS | |
0f2d19dd JB |
2613 | goto checkargs; |
2614 | #endif | |
2615 | #endif | |
2616 | break; | |
2617 | #endif /* ifdef MEMOIZE_LOCALS */ | |
d22a0ea1 | 2618 | |
0f2d19dd | 2619 | case scm_tcs_cons_nimcar: |
86d31dfe MV |
2620 | orig_sym = SCM_CAR (x); |
2621 | if (SCM_SYMBOLP (orig_sym)) | |
0f2d19dd | 2622 | { |
f8769b1d | 2623 | #ifdef USE_THREADS |
26d5b9b4 | 2624 | t.lloc = scm_lookupcar1 (x, env, 1); |
f8769b1d MV |
2625 | if (t.lloc == NULL) |
2626 | { | |
2627 | /* we have lost the race, start again. */ | |
2628 | goto dispatch; | |
2629 | } | |
2630 | proc = *t.lloc; | |
2631 | #else | |
26d5b9b4 | 2632 | proc = *scm_lookupcar (x, env, 1); |
f8769b1d MV |
2633 | #endif |
2634 | ||
0f2d19dd JB |
2635 | if (SCM_IMP (proc)) |
2636 | { | |
86d31dfe MV |
2637 | SCM_SETCAR (x, orig_sym); /* Undo memoizing effect of |
2638 | lookupcar */ | |
0f2d19dd JB |
2639 | goto badfun; |
2640 | } | |
22a52da1 | 2641 | if (SCM_MACROP (proc)) |
0f2d19dd | 2642 | { |
86d31dfe MV |
2643 | SCM_SETCAR (x, orig_sym); /* Undo memoizing effect of |
2644 | lookupcar */ | |
0f2d19dd | 2645 | handle_a_macro: |
368bf056 | 2646 | #ifdef DEVAL |
7c354052 MD |
2647 | /* Set a flag during macro expansion so that macro |
2648 | application frames can be deleted from the backtrace. */ | |
2649 | SCM_SET_MACROEXP (debug); | |
368bf056 | 2650 | #endif |
22a52da1 | 2651 | t.arg1 = SCM_APPLY (SCM_MACRO_CODE (proc), x, |
f8769b1d MV |
2652 | scm_cons (env, scm_listofnull)); |
2653 | ||
7c354052 MD |
2654 | #ifdef DEVAL |
2655 | SCM_CLEAR_MACROEXP (debug); | |
2656 | #endif | |
22a52da1 | 2657 | switch (SCM_MACRO_TYPE (proc)) |
0f2d19dd JB |
2658 | { |
2659 | case 2: | |
2660 | if (scm_ilength (t.arg1) <= 0) | |
8ea46249 | 2661 | t.arg1 = scm_list_2 (SCM_IM_BEGIN, t.arg1); |
6dbd0af5 | 2662 | #ifdef DEVAL |
22a52da1 | 2663 | if (!SCM_CLOSUREP (SCM_MACRO_CODE (proc))) |
6dbd0af5 | 2664 | { |
6dbd0af5 | 2665 | SCM_DEFER_INTS; |
a23afe53 MD |
2666 | SCM_SETCAR (x, SCM_CAR (t.arg1)); |
2667 | SCM_SETCDR (x, SCM_CDR (t.arg1)); | |
6dbd0af5 MD |
2668 | SCM_ALLOW_INTS; |
2669 | goto dispatch; | |
2670 | } | |
2671 | /* Prevent memoizing of debug info expression. */ | |
6203706f MD |
2672 | debug.info->e.exp = scm_cons_source (debug.info->e.exp, |
2673 | SCM_CAR (x), | |
2674 | SCM_CDR (x)); | |
6dbd0af5 | 2675 | #endif |
0f2d19dd | 2676 | SCM_DEFER_INTS; |
a23afe53 MD |
2677 | SCM_SETCAR (x, SCM_CAR (t.arg1)); |
2678 | SCM_SETCDR (x, SCM_CDR (t.arg1)); | |
0f2d19dd | 2679 | SCM_ALLOW_INTS; |
6dbd0af5 | 2680 | goto loopnoap; |
0f2d19dd JB |
2681 | case 1: |
2682 | if (SCM_NIMP (x = t.arg1)) | |
6dbd0af5 | 2683 | goto loopnoap; |
0f2d19dd JB |
2684 | case 0: |
2685 | RETURN (t.arg1); | |
2686 | } | |
2687 | } | |
2688 | } | |
2689 | else | |
2690 | proc = SCM_CEVAL (SCM_CAR (x), env); | |
22a52da1 | 2691 | SCM_ASRTGO (!SCM_IMP (proc), badfun); |
cf7c17e9 JB |
2692 | #ifndef SCM_RECKLESS |
2693 | #ifdef SCM_CAUTIOUS | |
0f2d19dd JB |
2694 | checkargs: |
2695 | #endif | |
2696 | if (SCM_CLOSUREP (proc)) | |
2697 | { | |
726d810a | 2698 | arg2 = SCM_CLOSURE_FORMALS (proc); |
0f2d19dd | 2699 | t.arg1 = SCM_CDR (x); |
726d810a | 2700 | while (!SCM_NULLP (arg2)) |
0f2d19dd | 2701 | { |
22a52da1 | 2702 | if (!SCM_CONSP (arg2)) |
0f2d19dd JB |
2703 | goto evapply; |
2704 | if (SCM_IMP (t.arg1)) | |
2705 | goto umwrongnumargs; | |
2706 | arg2 = SCM_CDR (arg2); | |
2707 | t.arg1 = SCM_CDR (t.arg1); | |
2708 | } | |
22a52da1 | 2709 | if (!SCM_NULLP (t.arg1)) |
0f2d19dd JB |
2710 | goto umwrongnumargs; |
2711 | } | |
22a52da1 | 2712 | else if (SCM_MACROP (proc)) |
0f2d19dd JB |
2713 | goto handle_a_macro; |
2714 | #endif | |
2715 | } | |
2716 | ||
2717 | ||
6dbd0af5 MD |
2718 | evapply: |
2719 | PREP_APPLY (proc, SCM_EOL); | |
2720 | if (SCM_NULLP (SCM_CDR (x))) { | |
2721 | ENTER_APPLY; | |
89efbff4 | 2722 | evap0: |
0f2d19dd JB |
2723 | switch (SCM_TYP7 (proc)) |
2724 | { /* no arguments given */ | |
2725 | case scm_tc7_subr_0: | |
2726 | RETURN (SCM_SUBRF (proc) ()); | |
2727 | case scm_tc7_subr_1o: | |
2728 | RETURN (SCM_SUBRF (proc) (SCM_UNDEFINED)); | |
2729 | case scm_tc7_lsubr: | |
2730 | RETURN (SCM_SUBRF (proc) (SCM_EOL)); | |
2731 | case scm_tc7_rpsubr: | |
2732 | RETURN (SCM_BOOL_T); | |
2733 | case scm_tc7_asubr: | |
2734 | RETURN (SCM_SUBRF (proc) (SCM_UNDEFINED, SCM_UNDEFINED)); | |
0717dfd8 | 2735 | case scm_tc7_smob: |
68b06924 | 2736 | if (!SCM_SMOB_APPLICABLE_P (proc)) |
0717dfd8 | 2737 | goto badfun; |
68b06924 | 2738 | RETURN (SCM_SMOB_APPLY_0 (proc)); |
0f2d19dd JB |
2739 | case scm_tc7_cclo: |
2740 | t.arg1 = proc; | |
2741 | proc = SCM_CCLO_SUBR (proc); | |
6dbd0af5 MD |
2742 | #ifdef DEVAL |
2743 | debug.info->a.proc = proc; | |
8ea46249 | 2744 | debug.info->a.args = scm_list_1 (t.arg1); |
6dbd0af5 | 2745 | #endif |
0f2d19dd | 2746 | goto evap1; |
89efbff4 MD |
2747 | case scm_tc7_pws: |
2748 | proc = SCM_PROCEDURE (proc); | |
2749 | #ifdef DEVAL | |
2750 | debug.info->a.proc = proc; | |
2751 | #endif | |
002f1a5d MD |
2752 | if (!SCM_CLOSUREP (proc)) |
2753 | goto evap0; | |
2754 | if (scm_badformalsp (proc, 0)) | |
2755 | goto umwrongnumargs; | |
0f2d19dd JB |
2756 | case scm_tcs_closures: |
2757 | x = SCM_CODE (proc); | |
726d810a | 2758 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), SCM_EOL, SCM_ENV (proc)); |
5280aaca | 2759 | goto nontoplevel_cdrxbegin; |
904a077d | 2760 | case scm_tcs_struct: |
195847fa MD |
2761 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) |
2762 | { | |
2763 | x = SCM_ENTITY_PROCEDURE (proc); | |
2764 | arg2 = SCM_EOL; | |
2765 | goto type_dispatch; | |
2766 | } | |
2767 | else if (!SCM_I_OPERATORP (proc)) | |
9b07e212 MD |
2768 | goto badfun; |
2769 | else | |
da7f71d7 | 2770 | { |
195847fa MD |
2771 | t.arg1 = proc; |
2772 | proc = (SCM_I_ENTITYP (proc) | |
2773 | ? SCM_ENTITY_PROCEDURE (proc) | |
2774 | : SCM_OPERATOR_PROCEDURE (proc)); | |
da7f71d7 | 2775 | #ifdef DEVAL |
195847fa | 2776 | debug.info->a.proc = proc; |
8ea46249 | 2777 | debug.info->a.args = scm_list_1 (t.arg1); |
da7f71d7 | 2778 | #endif |
195847fa MD |
2779 | if (SCM_NIMP (proc)) |
2780 | goto evap1; | |
2781 | else | |
2782 | goto badfun; | |
da7f71d7 | 2783 | } |
0f2d19dd JB |
2784 | case scm_tc7_subr_1: |
2785 | case scm_tc7_subr_2: | |
2786 | case scm_tc7_subr_2o: | |
2787 | case scm_tc7_cxr: | |
2788 | case scm_tc7_subr_3: | |
2789 | case scm_tc7_lsubr_2: | |
2790 | umwrongnumargs: | |
2791 | unmemocar (x, env); | |
2792 | wrongnumargs: | |
f5bf2977 GH |
2793 | /* scm_everr (x, env,...) */ |
2794 | scm_wrong_num_args (proc); | |
0f2d19dd JB |
2795 | default: |
2796 | /* handle macros here */ | |
2797 | goto badfun; | |
2798 | } | |
6dbd0af5 | 2799 | } |
0f2d19dd JB |
2800 | |
2801 | /* must handle macros by here */ | |
2802 | x = SCM_CDR (x); | |
cf7c17e9 | 2803 | #ifdef SCM_CAUTIOUS |
0f2d19dd JB |
2804 | if (SCM_IMP (x)) |
2805 | goto wrongnumargs; | |
680ed4a8 MD |
2806 | else if (SCM_CONSP (x)) |
2807 | { | |
2808 | if (SCM_IMP (SCM_CAR (x))) | |
6cb702da | 2809 | t.arg1 = SCM_EVALIM (SCM_CAR (x), env); |
680ed4a8 MD |
2810 | else |
2811 | t.arg1 = EVALCELLCAR (x, env); | |
2812 | } | |
680ed4a8 MD |
2813 | else |
2814 | goto wrongnumargs; | |
2815 | #else | |
0f2d19dd | 2816 | t.arg1 = EVALCAR (x, env); |
680ed4a8 | 2817 | #endif |
6dbd0af5 | 2818 | #ifdef DEVAL |
8ea46249 | 2819 | debug.info->a.args = scm_list_1 (t.arg1); |
6dbd0af5 | 2820 | #endif |
0f2d19dd JB |
2821 | x = SCM_CDR (x); |
2822 | if (SCM_NULLP (x)) | |
2823 | { | |
6dbd0af5 | 2824 | ENTER_APPLY; |
0f2d19dd JB |
2825 | evap1: |
2826 | switch (SCM_TYP7 (proc)) | |
6dbd0af5 | 2827 | { /* have one argument in t.arg1 */ |
0f2d19dd JB |
2828 | case scm_tc7_subr_2o: |
2829 | RETURN (SCM_SUBRF (proc) (t.arg1, SCM_UNDEFINED)); | |
2830 | case scm_tc7_subr_1: | |
2831 | case scm_tc7_subr_1o: | |
2832 | RETURN (SCM_SUBRF (proc) (t.arg1)); | |
2833 | case scm_tc7_cxr: | |
0f2d19dd JB |
2834 | if (SCM_SUBRF (proc)) |
2835 | { | |
2836 | if (SCM_INUMP (t.arg1)) | |
2837 | { | |
f8de44c1 | 2838 | RETURN (scm_make_real (SCM_DSUBRF (proc) ((double) SCM_INUM (t.arg1)))); |
0f2d19dd | 2839 | } |
01f11e02 | 2840 | else if (SCM_REALP (t.arg1)) |
0f2d19dd | 2841 | { |
eb42e2f0 | 2842 | RETURN (scm_make_real (SCM_DSUBRF (proc) (SCM_REAL_VALUE (t.arg1)))); |
0f2d19dd JB |
2843 | } |
2844 | #ifdef SCM_BIGDIG | |
01f11e02 | 2845 | else if (SCM_BIGP (t.arg1)) |
0f2d19dd | 2846 | { |
1be6b49c | 2847 | RETURN (scm_make_real (SCM_DSUBRF (proc) (scm_i_big2dbl (t.arg1)))); |
0f2d19dd JB |
2848 | } |
2849 | #endif | |
9de33deb | 2850 | SCM_WTA_DISPATCH_1 (*SCM_SUBR_GENERIC (proc), t.arg1, |
3db4adfc | 2851 | SCM_ARG1, SCM_SYMBOL_CHARS (SCM_SNAME (proc))); |
0f2d19dd | 2852 | } |
3201d763 | 2853 | proc = SCM_SNAME (proc); |
0f2d19dd | 2854 | { |
b5c2579a | 2855 | char *chrs = SCM_SYMBOL_CHARS (proc) + SCM_SYMBOL_LENGTH (proc) - 1; |
0f2d19dd JB |
2856 | while ('c' != *--chrs) |
2857 | { | |
0c95b57d | 2858 | SCM_ASSERT (SCM_CONSP (t.arg1), |
3db4adfc | 2859 | t.arg1, SCM_ARG1, SCM_SYMBOL_CHARS (proc)); |
0f2d19dd JB |
2860 | t.arg1 = ('a' == *chrs) ? SCM_CAR (t.arg1) : SCM_CDR (t.arg1); |
2861 | } | |
2862 | RETURN (t.arg1); | |
2863 | } | |
2864 | case scm_tc7_rpsubr: | |
2865 | RETURN (SCM_BOOL_T); | |
2866 | case scm_tc7_asubr: | |
2867 | RETURN (SCM_SUBRF (proc) (t.arg1, SCM_UNDEFINED)); | |
2868 | case scm_tc7_lsubr: | |
2869 | #ifdef DEVAL | |
ddea3325 | 2870 | RETURN (SCM_SUBRF (proc) (debug.info->a.args)); |
0f2d19dd | 2871 | #else |
8ea46249 | 2872 | RETURN (SCM_SUBRF (proc) (scm_list_1 (t.arg1))); |
0f2d19dd | 2873 | #endif |
0717dfd8 | 2874 | case scm_tc7_smob: |
68b06924 | 2875 | if (!SCM_SMOB_APPLICABLE_P (proc)) |
0717dfd8 | 2876 | goto badfun; |
68b06924 | 2877 | RETURN (SCM_SMOB_APPLY_1 (proc, t.arg1)); |
0f2d19dd JB |
2878 | case scm_tc7_cclo: |
2879 | arg2 = t.arg1; | |
2880 | t.arg1 = proc; | |
2881 | proc = SCM_CCLO_SUBR (proc); | |
6dbd0af5 MD |
2882 | #ifdef DEVAL |
2883 | debug.info->a.args = scm_cons (t.arg1, debug.info->a.args); | |
2884 | debug.info->a.proc = proc; | |
2885 | #endif | |
0f2d19dd | 2886 | goto evap2; |
89efbff4 MD |
2887 | case scm_tc7_pws: |
2888 | proc = SCM_PROCEDURE (proc); | |
2889 | #ifdef DEVAL | |
2890 | debug.info->a.proc = proc; | |
2891 | #endif | |
002f1a5d MD |
2892 | if (!SCM_CLOSUREP (proc)) |
2893 | goto evap1; | |
2894 | if (scm_badformalsp (proc, 1)) | |
2895 | goto umwrongnumargs; | |
0f2d19dd | 2896 | case scm_tcs_closures: |
195847fa | 2897 | /* clos1: */ |
0f2d19dd JB |
2898 | x = SCM_CODE (proc); |
2899 | #ifdef DEVAL | |
726d810a | 2900 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), debug.info->a.args, SCM_ENV (proc)); |
0f2d19dd | 2901 | #else |
8ea46249 | 2902 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), scm_list_1 (t.arg1), SCM_ENV (proc)); |
0f2d19dd | 2903 | #endif |
5280aaca | 2904 | goto nontoplevel_cdrxbegin; |
904a077d | 2905 | case scm_tcs_struct: |
f3d2630a MD |
2906 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) |
2907 | { | |
195847fa | 2908 | x = SCM_ENTITY_PROCEDURE (proc); |
f3d2630a MD |
2909 | #ifdef DEVAL |
2910 | arg2 = debug.info->a.args; | |
2911 | #else | |
8ea46249 | 2912 | arg2 = scm_list_1 (t.arg1); |
f3d2630a | 2913 | #endif |
f3d2630a MD |
2914 | goto type_dispatch; |
2915 | } | |
2916 | else if (!SCM_I_OPERATORP (proc)) | |
9b07e212 MD |
2917 | goto badfun; |
2918 | else | |
0c32d76c | 2919 | { |
195847fa MD |
2920 | arg2 = t.arg1; |
2921 | t.arg1 = proc; | |
2922 | proc = (SCM_I_ENTITYP (proc) | |
2923 | ? SCM_ENTITY_PROCEDURE (proc) | |
2924 | : SCM_OPERATOR_PROCEDURE (proc)); | |
0c32d76c | 2925 | #ifdef DEVAL |
195847fa MD |
2926 | debug.info->a.args = scm_cons (t.arg1, debug.info->a.args); |
2927 | debug.info->a.proc = proc; | |
0c32d76c | 2928 | #endif |
195847fa MD |
2929 | if (SCM_NIMP (proc)) |
2930 | goto evap2; | |
2931 | else | |
2932 | goto badfun; | |
0c32d76c | 2933 | } |
0f2d19dd JB |
2934 | case scm_tc7_subr_2: |
2935 | case scm_tc7_subr_0: | |
2936 | case scm_tc7_subr_3: | |
2937 | case scm_tc7_lsubr_2: | |
2938 | goto wrongnumargs; | |
2939 | default: | |
2940 | goto badfun; | |
2941 | } | |
2942 | } | |
cf7c17e9 | 2943 | #ifdef SCM_CAUTIOUS |
0f2d19dd JB |
2944 | if (SCM_IMP (x)) |
2945 | goto wrongnumargs; | |
680ed4a8 MD |
2946 | else if (SCM_CONSP (x)) |
2947 | { | |
2948 | if (SCM_IMP (SCM_CAR (x))) | |
6cb702da | 2949 | arg2 = SCM_EVALIM (SCM_CAR (x), env); |
680ed4a8 MD |
2950 | else |
2951 | arg2 = EVALCELLCAR (x, env); | |
2952 | } | |
680ed4a8 MD |
2953 | else |
2954 | goto wrongnumargs; | |
2955 | #else | |
2956 | arg2 = EVALCAR (x, env); | |
0f2d19dd JB |
2957 | #endif |
2958 | { /* have two or more arguments */ | |
6dbd0af5 | 2959 | #ifdef DEVAL |
8ea46249 | 2960 | debug.info->a.args = scm_list_2 (t.arg1, arg2); |
6dbd0af5 | 2961 | #endif |
0f2d19dd JB |
2962 | x = SCM_CDR (x); |
2963 | if (SCM_NULLP (x)) { | |
6dbd0af5 | 2964 | ENTER_APPLY; |
0f2d19dd | 2965 | evap2: |
6dbd0af5 MD |
2966 | switch (SCM_TYP7 (proc)) |
2967 | { /* have two arguments */ | |
2968 | case scm_tc7_subr_2: | |
2969 | case scm_tc7_subr_2o: | |
2970 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2)); | |
2971 | case scm_tc7_lsubr: | |
0f2d19dd | 2972 | #ifdef DEVAL |
ddea3325 | 2973 | RETURN (SCM_SUBRF (proc) (debug.info->a.args)); |
6dbd0af5 | 2974 | #else |
8ea46249 | 2975 | RETURN (SCM_SUBRF (proc) (scm_list_2 (t.arg1, arg2))); |
0f2d19dd | 2976 | #endif |
6dbd0af5 MD |
2977 | case scm_tc7_lsubr_2: |
2978 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, SCM_EOL)); | |
2979 | case scm_tc7_rpsubr: | |
2980 | case scm_tc7_asubr: | |
2981 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2)); | |
0717dfd8 | 2982 | case scm_tc7_smob: |
68b06924 | 2983 | if (!SCM_SMOB_APPLICABLE_P (proc)) |
0717dfd8 | 2984 | goto badfun; |
68b06924 | 2985 | RETURN (SCM_SMOB_APPLY_2 (proc, t.arg1, arg2)); |
6dbd0af5 MD |
2986 | cclon: |
2987 | case scm_tc7_cclo: | |
0f2d19dd | 2988 | #ifdef DEVAL |
195847fa MD |
2989 | RETURN (SCM_APPLY (SCM_CCLO_SUBR (proc), |
2990 | scm_cons (proc, debug.info->a.args), | |
2991 | SCM_EOL)); | |
0f2d19dd | 2992 | #else |
195847fa MD |
2993 | RETURN (SCM_APPLY (SCM_CCLO_SUBR (proc), |
2994 | scm_cons2 (proc, t.arg1, | |
2995 | scm_cons (arg2, | |
2996 | scm_eval_args (x, | |
2997 | env, | |
2998 | proc))), | |
2999 | SCM_EOL)); | |
6dbd0af5 | 3000 | #endif |
904a077d | 3001 | case scm_tcs_struct: |
f3d2630a MD |
3002 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) |
3003 | { | |
195847fa | 3004 | x = SCM_ENTITY_PROCEDURE (proc); |
f3d2630a MD |
3005 | #ifdef DEVAL |
3006 | arg2 = debug.info->a.args; | |
3007 | #else | |
8ea46249 | 3008 | arg2 = scm_list_2 (t.arg1, arg2); |
f3d2630a | 3009 | #endif |
f3d2630a MD |
3010 | goto type_dispatch; |
3011 | } | |
3012 | else if (!SCM_I_OPERATORP (proc)) | |
9b07e212 MD |
3013 | goto badfun; |
3014 | else | |
0c32d76c | 3015 | { |
195847fa | 3016 | operatorn: |
0c32d76c | 3017 | #ifdef DEVAL |
195847fa MD |
3018 | RETURN (SCM_APPLY (SCM_I_ENTITYP (proc) |
3019 | ? SCM_ENTITY_PROCEDURE (proc) | |
3020 | : SCM_OPERATOR_PROCEDURE (proc), | |
3021 | scm_cons (proc, debug.info->a.args), | |
3022 | SCM_EOL)); | |
3023 | #else | |
3024 | RETURN (SCM_APPLY (SCM_I_ENTITYP (proc) | |
3025 | ? SCM_ENTITY_PROCEDURE (proc) | |
3026 | : SCM_OPERATOR_PROCEDURE (proc), | |
3027 | scm_cons2 (proc, t.arg1, | |
3028 | scm_cons (arg2, | |
3029 | scm_eval_args (x, | |
3030 | env, | |
3031 | proc))), | |
3032 | SCM_EOL)); | |
3033 | #endif | |
0c32d76c | 3034 | } |
6dbd0af5 MD |
3035 | case scm_tc7_subr_0: |
3036 | case scm_tc7_cxr: | |
3037 | case scm_tc7_subr_1o: | |
3038 | case scm_tc7_subr_1: | |
3039 | case scm_tc7_subr_3: | |
6dbd0af5 MD |
3040 | goto wrongnumargs; |
3041 | default: | |
3042 | goto badfun; | |
002f1a5d MD |
3043 | case scm_tc7_pws: |
3044 | proc = SCM_PROCEDURE (proc); | |
3045 | #ifdef DEVAL | |
3046 | debug.info->a.proc = proc; | |
3047 | #endif | |
3048 | if (!SCM_CLOSUREP (proc)) | |
3049 | goto evap2; | |
3050 | if (scm_badformalsp (proc, 2)) | |
3051 | goto umwrongnumargs; | |
6dbd0af5 | 3052 | case scm_tcs_closures: |
195847fa | 3053 | /* clos2: */ |
0f2d19dd | 3054 | #ifdef DEVAL |
726d810a | 3055 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), |
da7f71d7 MD |
3056 | debug.info->a.args, |
3057 | SCM_ENV (proc)); | |
0f2d19dd | 3058 | #else |
726d810a | 3059 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), |
8ea46249 | 3060 | scm_list_2 (t.arg1, arg2), SCM_ENV (proc)); |
0f2d19dd | 3061 | #endif |
6dbd0af5 | 3062 | x = SCM_CODE (proc); |
5280aaca | 3063 | goto nontoplevel_cdrxbegin; |
6dbd0af5 | 3064 | } |
0f2d19dd | 3065 | } |
cf7c17e9 | 3066 | #ifdef SCM_CAUTIOUS |
01f11e02 | 3067 | if (SCM_IMP (x) || !SCM_CONSP (x)) |
680ed4a8 MD |
3068 | goto wrongnumargs; |
3069 | #endif | |
0f2d19dd | 3070 | #ifdef DEVAL |
6dbd0af5 | 3071 | debug.info->a.args = scm_cons2 (t.arg1, arg2, |
680ed4a8 MD |
3072 | scm_deval_args (x, env, proc, |
3073 | SCM_CDRLOC (SCM_CDR (debug.info->a.args)))); | |
0f2d19dd | 3074 | #endif |
6dbd0af5 | 3075 | ENTER_APPLY; |
89efbff4 | 3076 | evap3: |
6dbd0af5 MD |
3077 | switch (SCM_TYP7 (proc)) |
3078 | { /* have 3 or more arguments */ | |
0f2d19dd | 3079 | #ifdef DEVAL |
6dbd0af5 MD |
3080 | case scm_tc7_subr_3: |
3081 | SCM_ASRTGO (SCM_NULLP (SCM_CDR (x)), wrongnumargs); | |
da7f71d7 MD |
3082 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, |
3083 | SCM_CADDR (debug.info->a.args))); | |
6dbd0af5 | 3084 | case scm_tc7_asubr: |
399dedcc MD |
3085 | #ifdef BUILTIN_RPASUBR |
3086 | t.arg1 = SCM_SUBRF(proc)(t.arg1, arg2); | |
8ea46249 | 3087 | arg2 = SCM_CDDR (debug.info->a.args); |
da7f71d7 MD |
3088 | do |
3089 | { | |
3090 | t.arg1 = SCM_SUBRF(proc)(t.arg1, SCM_CAR (arg2)); | |
3091 | arg2 = SCM_CDR (arg2); | |
3092 | } | |
3093 | while (SCM_NIMP (arg2)); | |
ddea3325 | 3094 | RETURN (t.arg1); |
399dedcc | 3095 | #endif /* BUILTIN_RPASUBR */ |
6dbd0af5 | 3096 | case scm_tc7_rpsubr: |
71d3aa6d MD |
3097 | #ifdef BUILTIN_RPASUBR |
3098 | if (SCM_FALSEP (SCM_SUBRF (proc) (t.arg1, arg2))) | |
ddea3325 | 3099 | RETURN (SCM_BOOL_F); |
8ea46249 | 3100 | t.arg1 = SCM_CDDR (debug.info->a.args); |
da7f71d7 MD |
3101 | do |
3102 | { | |
3103 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg2, SCM_CAR (t.arg1)))) | |
ddea3325 DH |
3104 | RETURN (SCM_BOOL_F); |
3105 | arg2 = SCM_CAR (t.arg1); | |
da7f71d7 MD |
3106 | t.arg1 = SCM_CDR (t.arg1); |
3107 | } | |
3108 | while (SCM_NIMP (t.arg1)); | |
ddea3325 | 3109 | RETURN (SCM_BOOL_T); |
71d3aa6d | 3110 | #else /* BUILTIN_RPASUBR */ |
da7f71d7 MD |
3111 | RETURN (SCM_APPLY (proc, t.arg1, |
3112 | scm_acons (arg2, | |
8ea46249 | 3113 | SCM_CDDR (debug.info->a.args), |
ddea3325 | 3114 | SCM_EOL))); |
71d3aa6d | 3115 | #endif /* BUILTIN_RPASUBR */ |
399dedcc | 3116 | case scm_tc7_lsubr_2: |
da7f71d7 | 3117 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, |
ddea3325 | 3118 | SCM_CDDR (debug.info->a.args))); |
399dedcc | 3119 | case scm_tc7_lsubr: |
ddea3325 | 3120 | RETURN (SCM_SUBRF (proc) (debug.info->a.args)); |
0717dfd8 | 3121 | case scm_tc7_smob: |
68b06924 | 3122 | if (!SCM_SMOB_APPLICABLE_P (proc)) |
0717dfd8 | 3123 | goto badfun; |
68b06924 KN |
3124 | RETURN (SCM_SMOB_APPLY_3 (proc, t.arg1, arg2, |
3125 | SCM_CDDR (debug.info->a.args))); | |
6dbd0af5 MD |
3126 | case scm_tc7_cclo: |
3127 | goto cclon; | |
89efbff4 MD |
3128 | case scm_tc7_pws: |
3129 | proc = SCM_PROCEDURE (proc); | |
3130 | debug.info->a.proc = proc; | |
002f1a5d MD |
3131 | if (!SCM_CLOSUREP (proc)) |
3132 | goto evap3; | |
726d810a | 3133 | if (scm_badargsp (SCM_CLOSURE_FORMALS (proc), debug.info->a.args)) |
002f1a5d | 3134 | goto umwrongnumargs; |
6dbd0af5 | 3135 | case scm_tcs_closures: |
b7ff98dd | 3136 | SCM_SET_ARGSREADY (debug); |
726d810a | 3137 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), |
6dbd0af5 MD |
3138 | debug.info->a.args, |
3139 | SCM_ENV (proc)); | |
3140 | x = SCM_CODE (proc); | |
5280aaca | 3141 | goto nontoplevel_cdrxbegin; |
6dbd0af5 MD |
3142 | #else /* DEVAL */ |
3143 | case scm_tc7_subr_3: | |
3144 | SCM_ASRTGO (SCM_NULLP (SCM_CDR (x)), wrongnumargs); | |
3145 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, EVALCAR (x, env))); | |
3146 | case scm_tc7_asubr: | |
399dedcc | 3147 | #ifdef BUILTIN_RPASUBR |
da7f71d7 MD |
3148 | t.arg1 = SCM_SUBRF (proc) (t.arg1, arg2); |
3149 | do | |
3150 | { | |
3151 | t.arg1 = SCM_SUBRF(proc)(t.arg1, EVALCAR(x, env)); | |
3152 | x = SCM_CDR(x); | |
3153 | } | |
3154 | while (SCM_NIMP (x)); | |
ddea3325 | 3155 | RETURN (t.arg1); |
399dedcc | 3156 | #endif /* BUILTIN_RPASUBR */ |
6dbd0af5 | 3157 | case scm_tc7_rpsubr: |
71d3aa6d MD |
3158 | #ifdef BUILTIN_RPASUBR |
3159 | if (SCM_FALSEP (SCM_SUBRF (proc) (t.arg1, arg2))) | |
ddea3325 | 3160 | RETURN (SCM_BOOL_F); |
da7f71d7 MD |
3161 | do |
3162 | { | |
3163 | t.arg1 = EVALCAR (x, env); | |
3164 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg2, t.arg1))) | |
ddea3325 DH |
3165 | RETURN (SCM_BOOL_F); |
3166 | arg2 = t.arg1; | |
da7f71d7 MD |
3167 | x = SCM_CDR (x); |
3168 | } | |
3169 | while (SCM_NIMP (x)); | |
ddea3325 | 3170 | RETURN (SCM_BOOL_T); |
71d3aa6d | 3171 | #else /* BUILTIN_RPASUBR */ |
da7f71d7 | 3172 | RETURN (SCM_APPLY (proc, t.arg1, |
680ed4a8 MD |
3173 | scm_acons (arg2, |
3174 | scm_eval_args (x, env, proc), | |
3175 | SCM_EOL))); | |
71d3aa6d | 3176 | #endif /* BUILTIN_RPASUBR */ |
6dbd0af5 | 3177 | case scm_tc7_lsubr_2: |
680ed4a8 | 3178 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, scm_eval_args (x, env, proc))); |
6dbd0af5 | 3179 | case scm_tc7_lsubr: |
680ed4a8 MD |
3180 | RETURN (SCM_SUBRF (proc) (scm_cons2 (t.arg1, |
3181 | arg2, | |
3182 | scm_eval_args (x, env, proc)))); | |
0717dfd8 | 3183 | case scm_tc7_smob: |
68b06924 | 3184 | if (!SCM_SMOB_APPLICABLE_P (proc)) |
0717dfd8 | 3185 | goto badfun; |
68b06924 KN |
3186 | RETURN (SCM_SMOB_APPLY_3 (proc, t.arg1, arg2, |
3187 | scm_eval_args (x, env, proc))); | |
6dbd0af5 MD |
3188 | case scm_tc7_cclo: |
3189 | goto cclon; | |
89efbff4 MD |
3190 | case scm_tc7_pws: |
3191 | proc = SCM_PROCEDURE (proc); | |
002f1a5d MD |
3192 | if (!SCM_CLOSUREP (proc)) |
3193 | goto evap3; | |
3194 | { | |
726d810a | 3195 | SCM formals = SCM_CLOSURE_FORMALS (proc); |
002f1a5d MD |
3196 | if (SCM_NULLP (formals) |
3197 | || (SCM_CONSP (formals) | |
3198 | && (SCM_NULLP (SCM_CDR (formals)) | |
3199 | || (SCM_CONSP (SCM_CDR (formals)) | |
3200 | && scm_badargsp (SCM_CDDR (formals), x))))) | |
3201 | goto umwrongnumargs; | |
3202 | } | |
6dbd0af5 MD |
3203 | case scm_tcs_closures: |
3204 | #ifdef DEVAL | |
b7ff98dd | 3205 | SCM_SET_ARGSREADY (debug); |
6dbd0af5 | 3206 | #endif |
726d810a | 3207 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), |
680ed4a8 MD |
3208 | scm_cons2 (t.arg1, |
3209 | arg2, | |
3210 | scm_eval_args (x, env, proc)), | |
6dbd0af5 MD |
3211 | SCM_ENV (proc)); |
3212 | x = SCM_CODE (proc); | |
5280aaca | 3213 | goto nontoplevel_cdrxbegin; |
0f2d19dd | 3214 | #endif /* DEVAL */ |
904a077d | 3215 | case scm_tcs_struct: |
f3d2630a MD |
3216 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) |
3217 | { | |
3218 | #ifdef DEVAL | |
3219 | arg2 = debug.info->a.args; | |
3220 | #else | |
3221 | arg2 = scm_cons2 (t.arg1, arg2, scm_eval_args (x, env, proc)); | |
3222 | #endif | |
195847fa | 3223 | x = SCM_ENTITY_PROCEDURE (proc); |
f3d2630a MD |
3224 | goto type_dispatch; |
3225 | } | |
3226 | else if (!SCM_I_OPERATORP (proc)) | |
9b07e212 MD |
3227 | goto badfun; |
3228 | else | |
195847fa | 3229 | goto operatorn; |
6dbd0af5 MD |
3230 | case scm_tc7_subr_2: |
3231 | case scm_tc7_subr_1o: | |
3232 | case scm_tc7_subr_2o: | |
3233 | case scm_tc7_subr_0: | |
3234 | case scm_tc7_cxr: | |
3235 | case scm_tc7_subr_1: | |
6dbd0af5 MD |
3236 | goto wrongnumargs; |
3237 | default: | |
3238 | goto badfun; | |
3239 | } | |
0f2d19dd JB |
3240 | } |
3241 | #ifdef DEVAL | |
6dbd0af5 | 3242 | exit: |
b6d75948 | 3243 | if (CHECK_EXIT && SCM_TRAPS_P) |
b7ff98dd | 3244 | if (SCM_EXIT_FRAME_P || (SCM_TRACE_P && SCM_TRACED_FRAME_P (debug))) |
6dbd0af5 | 3245 | { |
b7ff98dd MD |
3246 | SCM_CLEAR_TRACED_FRAME (debug); |
3247 | if (SCM_CHEAPTRAPS_P) | |
c0ab1b8d | 3248 | t.arg1 = scm_make_debugobj (&debug); |
6dbd0af5 MD |
3249 | else |
3250 | { | |
5f144b10 GH |
3251 | int first; |
3252 | SCM val = scm_make_continuation (&first); | |
3253 | ||
3254 | if (first) | |
3255 | t.arg1 = val; | |
3256 | else | |
6dbd0af5 | 3257 | { |
5f144b10 | 3258 | proc = val; |
6dbd0af5 MD |
3259 | goto ret; |
3260 | } | |
3261 | } | |
d95c0b76 NJ |
3262 | SCM_TRAPS_P = 0; |
3263 | scm_call_3 (SCM_EXIT_FRAME_HDLR, scm_sym_exit_frame, t.arg1, proc); | |
3264 | SCM_TRAPS_P = 1; | |
6dbd0af5 MD |
3265 | } |
3266 | ret: | |
1646d37b | 3267 | scm_last_debug_frame = debug.prev; |
0f2d19dd JB |
3268 | return proc; |
3269 | #endif | |
3270 | } | |
3271 | ||
6dbd0af5 MD |
3272 | |
3273 | /* SECTION: This code is compiled once. | |
3274 | */ | |
3275 | ||
0f2d19dd JB |
3276 | #ifndef DEVAL |
3277 | ||
fdc28395 KN |
3278 | \f |
3279 | /* Simple procedure calls | |
3280 | */ | |
3281 | ||
3282 | SCM | |
3283 | scm_call_0 (SCM proc) | |
3284 | { | |
3285 | return scm_apply (proc, SCM_EOL, SCM_EOL); | |
3286 | } | |
3287 | ||
3288 | SCM | |
3289 | scm_call_1 (SCM proc, SCM arg1) | |
3290 | { | |
3291 | return scm_apply (proc, arg1, scm_listofnull); | |
3292 | } | |
3293 | ||
3294 | SCM | |
3295 | scm_call_2 (SCM proc, SCM arg1, SCM arg2) | |
3296 | { | |
3297 | return scm_apply (proc, arg1, scm_cons (arg2, scm_listofnull)); | |
3298 | } | |
3299 | ||
3300 | SCM | |
3301 | scm_call_3 (SCM proc, SCM arg1, SCM arg2, SCM arg3) | |
3302 | { | |
3303 | return scm_apply (proc, arg1, scm_cons2 (arg2, arg3, scm_listofnull)); | |
3304 | } | |
3305 | ||
d95c0b76 NJ |
3306 | SCM |
3307 | scm_call_4 (SCM proc, SCM arg1, SCM arg2, SCM arg3, SCM arg4) | |
3308 | { | |
3309 | return scm_apply (proc, arg1, scm_cons2 (arg2, arg3, | |
3310 | scm_cons (arg4, scm_listofnull))); | |
3311 | } | |
3312 | ||
fdc28395 KN |
3313 | /* Simple procedure applies |
3314 | */ | |
3315 | ||
3316 | SCM | |
3317 | scm_apply_0 (SCM proc, SCM args) | |
3318 | { | |
3319 | return scm_apply (proc, args, SCM_EOL); | |
3320 | } | |
3321 | ||
3322 | SCM | |
3323 | scm_apply_1 (SCM proc, SCM arg1, SCM args) | |
3324 | { | |
3325 | return scm_apply (proc, scm_cons (arg1, args), SCM_EOL); | |
3326 | } | |
3327 | ||
3328 | SCM | |
3329 | scm_apply_2 (SCM proc, SCM arg1, SCM arg2, SCM args) | |
3330 | { | |
3331 | return scm_apply (proc, scm_cons2 (arg1, arg2, args), SCM_EOL); | |
3332 | } | |
3333 | ||
3334 | SCM | |
3335 | scm_apply_3 (SCM proc, SCM arg1, SCM arg2, SCM arg3, SCM args) | |
3336 | { | |
3337 | return scm_apply (proc, scm_cons (arg1, scm_cons2 (arg2, arg3, args)), | |
3338 | SCM_EOL); | |
3339 | } | |
3340 | ||
82a2622a | 3341 | /* This code processes the arguments to apply: |
b145c172 JB |
3342 | |
3343 | (apply PROC ARG1 ... ARGS) | |
3344 | ||
82a2622a JB |
3345 | Given a list (ARG1 ... ARGS), this function conses the ARG1 |
3346 | ... arguments onto the front of ARGS, and returns the resulting | |
3347 | list. Note that ARGS is a list; thus, the argument to this | |
3348 | function is a list whose last element is a list. | |
3349 | ||
3350 | Apply calls this function, and applies PROC to the elements of the | |
b145c172 JB |
3351 | result. apply:nconc2last takes care of building the list of |
3352 | arguments, given (ARG1 ... ARGS). | |
3353 | ||
82a2622a JB |
3354 | Rather than do new consing, apply:nconc2last destroys its argument. |
3355 | On that topic, this code came into my care with the following | |
3356 | beautifully cryptic comment on that topic: "This will only screw | |
3357 | you if you do (scm_apply scm_apply '( ... ))" If you know what | |
3358 | they're referring to, send me a patch to this comment. */ | |
b145c172 | 3359 | |
3b3b36dd | 3360 | SCM_DEFINE (scm_nconc2last, "apply:nconc2last", 1, 0, 0, |
b3f26b14 MG |
3361 | (SCM lst), |
3362 | "Given a list (@var{arg1} @dots{} @var{args}), this function\n" | |
3363 | "conses the @var{arg1} @dots{} arguments onto the front of\n" | |
3364 | "@var{args}, and returns the resulting list. Note that\n" | |
3365 | "@var{args} is a list; thus, the argument to this function is\n" | |
3366 | "a list whose last element is a list.\n" | |
3367 | "Note: Rather than do new consing, @code{apply:nconc2last}\n" | |
3368 | "destroys its argument, so use with care.") | |
1bbd0b84 | 3369 | #define FUNC_NAME s_scm_nconc2last |
0f2d19dd JB |
3370 | { |
3371 | SCM *lloc; | |
c1bfcf60 | 3372 | SCM_VALIDATE_NONEMPTYLIST (1,lst); |
0f2d19dd | 3373 | lloc = &lst; |
01f11e02 | 3374 | while (!SCM_NULLP (SCM_CDR (*lloc))) |
a23afe53 | 3375 | lloc = SCM_CDRLOC (*lloc); |
1bbd0b84 | 3376 | SCM_ASSERT (scm_ilength (SCM_CAR (*lloc)) >= 0, lst, SCM_ARG1, FUNC_NAME); |
0f2d19dd JB |
3377 | *lloc = SCM_CAR (*lloc); |
3378 | return lst; | |
3379 | } | |
1bbd0b84 | 3380 | #undef FUNC_NAME |
0f2d19dd JB |
3381 | |
3382 | #endif /* !DEVAL */ | |
3383 | ||
6dbd0af5 MD |
3384 | |
3385 | /* SECTION: When DEVAL is defined this code yields scm_dapply. | |
3386 | * It is compiled twice. | |
3387 | */ | |
3388 | ||
0f2d19dd | 3389 | #if 0 |
1cc91f1b | 3390 | |
0f2d19dd | 3391 | SCM |
6e8d25a6 | 3392 | scm_apply (SCM proc, SCM arg1, SCM args) |
0f2d19dd JB |
3393 | {} |
3394 | #endif | |
3395 | ||
3396 | #if 0 | |
1cc91f1b | 3397 | |
0f2d19dd | 3398 | SCM |
6e8d25a6 GB |
3399 | scm_dapply (SCM proc, SCM arg1, SCM args) |
3400 | { /* empty */ } | |
0f2d19dd JB |
3401 | #endif |
3402 | ||
1cc91f1b | 3403 | |
82a2622a JB |
3404 | /* Apply a function to a list of arguments. |
3405 | ||
3406 | This function is exported to the Scheme level as taking two | |
3407 | required arguments and a tail argument, as if it were: | |
3408 | (lambda (proc arg1 . args) ...) | |
3409 | Thus, if you just have a list of arguments to pass to a procedure, | |
3410 | pass the list as ARG1, and '() for ARGS. If you have some fixed | |
3411 | args, pass the first as ARG1, then cons any remaining fixed args | |
3412 | onto the front of your argument list, and pass that as ARGS. */ | |
3413 | ||
0f2d19dd | 3414 | SCM |
1bbd0b84 | 3415 | SCM_APPLY (SCM proc, SCM arg1, SCM args) |
0f2d19dd JB |
3416 | { |
3417 | #ifdef DEBUG_EXTENSIONS | |
3418 | #ifdef DEVAL | |
92c2555f MV |
3419 | scm_t_debug_frame debug; |
3420 | scm_t_debug_info debug_vect_body; | |
1646d37b | 3421 | debug.prev = scm_last_debug_frame; |
b7ff98dd | 3422 | debug.status = SCM_APPLYFRAME; |
c0ab1b8d | 3423 | debug.vect = &debug_vect_body; |
6dbd0af5 MD |
3424 | debug.vect[0].a.proc = proc; |
3425 | debug.vect[0].a.args = SCM_EOL; | |
1646d37b | 3426 | scm_last_debug_frame = &debug; |
0f2d19dd | 3427 | #else |
b7ff98dd | 3428 | if (SCM_DEBUGGINGP) |
0f2d19dd JB |
3429 | return scm_dapply (proc, arg1, args); |
3430 | #endif | |
3431 | #endif | |
3432 | ||
3433 | SCM_ASRTGO (SCM_NIMP (proc), badproc); | |
82a2622a JB |
3434 | |
3435 | /* If ARGS is the empty list, then we're calling apply with only two | |
3436 | arguments --- ARG1 is the list of arguments for PROC. Whatever | |
3437 | the case, futz with things so that ARG1 is the first argument to | |
3438 | give to PROC (or SCM_UNDEFINED if no args), and ARGS contains the | |
30000774 JB |
3439 | rest. |
3440 | ||
3441 | Setting the debug apply frame args this way is pretty messy. | |
3442 | Perhaps we should store arg1 and args directly in the frame as | |
3443 | received, and let scm_frame_arguments unpack them, because that's | |
3444 | a relatively rare operation. This works for now; if the Guile | |
3445 | developer archives are still around, see Mikael's post of | |
3446 | 11-Apr-97. */ | |
0f2d19dd JB |
3447 | if (SCM_NULLP (args)) |
3448 | { | |
3449 | if (SCM_NULLP (arg1)) | |
30000774 JB |
3450 | { |
3451 | arg1 = SCM_UNDEFINED; | |
3452 | #ifdef DEVAL | |
3453 | debug.vect[0].a.args = SCM_EOL; | |
3454 | #endif | |
3455 | } | |
0f2d19dd JB |
3456 | else |
3457 | { | |
30000774 JB |
3458 | #ifdef DEVAL |
3459 | debug.vect[0].a.args = arg1; | |
3460 | #endif | |
0f2d19dd JB |
3461 | args = SCM_CDR (arg1); |
3462 | arg1 = SCM_CAR (arg1); | |
3463 | } | |
3464 | } | |
3465 | else | |
3466 | { | |
0f2d19dd | 3467 | args = scm_nconc2last (args); |
30000774 JB |
3468 | #ifdef DEVAL |
3469 | debug.vect[0].a.args = scm_cons (arg1, args); | |
3470 | #endif | |
0f2d19dd | 3471 | } |
0f2d19dd | 3472 | #ifdef DEVAL |
b6d75948 | 3473 | if (SCM_ENTER_FRAME_P && SCM_TRAPS_P) |
6dbd0af5 MD |
3474 | { |
3475 | SCM tmp; | |
b7ff98dd | 3476 | if (SCM_CHEAPTRAPS_P) |
c0ab1b8d | 3477 | tmp = scm_make_debugobj (&debug); |
6dbd0af5 MD |
3478 | else |
3479 | { | |
5f144b10 GH |
3480 | int first; |
3481 | ||
3482 | tmp = scm_make_continuation (&first); | |
3483 | if (!first) | |
6dbd0af5 MD |
3484 | goto entap; |
3485 | } | |
d95c0b76 NJ |
3486 | SCM_TRAPS_P = 0; |
3487 | scm_call_2 (SCM_ENTER_FRAME_HDLR, scm_sym_enter_frame, tmp); | |
3488 | SCM_TRAPS_P = 1; | |
6dbd0af5 MD |
3489 | } |
3490 | entap: | |
3491 | ENTER_APPLY; | |
3492 | #endif | |
6dbd0af5 | 3493 | tail: |
0f2d19dd JB |
3494 | switch (SCM_TYP7 (proc)) |
3495 | { | |
3496 | case scm_tc7_subr_2o: | |
3497 | args = SCM_NULLP (args) ? SCM_UNDEFINED : SCM_CAR (args); | |
ddea3325 | 3498 | RETURN (SCM_SUBRF (proc) (arg1, args)); |
0f2d19dd | 3499 | case scm_tc7_subr_2: |
01f11e02 | 3500 | SCM_ASRTGO (!SCM_NULLP (args) && SCM_NULLP (SCM_CDR (args)), |
269861c7 | 3501 | wrongnumargs); |
0f2d19dd | 3502 | args = SCM_CAR (args); |
ddea3325 | 3503 | RETURN (SCM_SUBRF (proc) (arg1, args)); |
0f2d19dd JB |
3504 | case scm_tc7_subr_0: |
3505 | SCM_ASRTGO (SCM_UNBNDP (arg1), wrongnumargs); | |
ddea3325 | 3506 | RETURN (SCM_SUBRF (proc) ()); |
0f2d19dd | 3507 | case scm_tc7_subr_1: |
41ee56dd | 3508 | SCM_ASRTGO (!SCM_UNBNDP (arg1), wrongnumargs); |
0f2d19dd JB |
3509 | case scm_tc7_subr_1o: |
3510 | SCM_ASRTGO (SCM_NULLP (args), wrongnumargs); | |
ddea3325 | 3511 | RETURN (SCM_SUBRF (proc) (arg1)); |
0f2d19dd | 3512 | case scm_tc7_cxr: |
90cd76d9 | 3513 | SCM_ASRTGO (!SCM_UNBNDP (arg1) && SCM_NULLP (args), wrongnumargs); |
0f2d19dd JB |
3514 | if (SCM_SUBRF (proc)) |
3515 | { | |
6dbd0af5 MD |
3516 | if (SCM_INUMP (arg1)) |
3517 | { | |
f8de44c1 | 3518 | RETURN (scm_make_real (SCM_DSUBRF (proc) ((double) SCM_INUM (arg1)))); |
6dbd0af5 | 3519 | } |
01f11e02 | 3520 | else if (SCM_REALP (arg1)) |
6dbd0af5 | 3521 | { |
eb42e2f0 | 3522 | RETURN (scm_make_real (SCM_DSUBRF (proc) (SCM_REAL_VALUE (arg1)))); |
6dbd0af5 | 3523 | } |
0f2d19dd | 3524 | #ifdef SCM_BIGDIG |
01f11e02 | 3525 | else if (SCM_BIGP (arg1)) |
ddea3325 | 3526 | RETURN (scm_make_real (SCM_DSUBRF (proc) (scm_i_big2dbl (arg1)))); |
0f2d19dd | 3527 | #endif |
9de33deb | 3528 | SCM_WTA_DISPATCH_1 (*SCM_SUBR_GENERIC (proc), arg1, |
3db4adfc | 3529 | SCM_ARG1, SCM_SYMBOL_CHARS (SCM_SNAME (proc))); |
0f2d19dd | 3530 | } |
3201d763 | 3531 | proc = SCM_SNAME (proc); |
0f2d19dd | 3532 | { |
b5c2579a | 3533 | char *chrs = SCM_SYMBOL_CHARS (proc) + SCM_SYMBOL_LENGTH (proc) - 1; |
0f2d19dd JB |
3534 | while ('c' != *--chrs) |
3535 | { | |
0c95b57d | 3536 | SCM_ASSERT (SCM_CONSP (arg1), |
3db4adfc | 3537 | arg1, SCM_ARG1, SCM_SYMBOL_CHARS (proc)); |
0f2d19dd JB |
3538 | arg1 = ('a' == *chrs) ? SCM_CAR (arg1) : SCM_CDR (arg1); |
3539 | } | |
ddea3325 | 3540 | RETURN (arg1); |
0f2d19dd JB |
3541 | } |
3542 | case scm_tc7_subr_3: | |
01f11e02 DH |
3543 | SCM_ASRTGO (!SCM_NULLP (args) |
3544 | && !SCM_NULLP (SCM_CDR (args)) | |
f1e06a96 MD |
3545 | && SCM_NULLP (SCM_CDDR (args)), |
3546 | wrongnumargs); | |
ddea3325 | 3547 | RETURN (SCM_SUBRF (proc) (arg1, SCM_CAR (args), SCM_CADR (args))); |
0f2d19dd JB |
3548 | case scm_tc7_lsubr: |
3549 | #ifdef DEVAL | |
ddea3325 | 3550 | RETURN (SCM_SUBRF (proc) (SCM_UNBNDP (arg1) ? SCM_EOL : debug.vect[0].a.args)); |
0f2d19dd | 3551 | #else |
ddea3325 | 3552 | RETURN (SCM_SUBRF (proc) (SCM_UNBNDP (arg1) ? SCM_EOL : scm_cons (arg1, args))); |
0f2d19dd JB |
3553 | #endif |
3554 | case scm_tc7_lsubr_2: | |
0c95b57d | 3555 | SCM_ASRTGO (SCM_CONSP (args), wrongnumargs); |
ddea3325 | 3556 | RETURN (SCM_SUBRF (proc) (arg1, SCM_CAR (args), SCM_CDR (args))); |
0f2d19dd JB |
3557 | case scm_tc7_asubr: |
3558 | if (SCM_NULLP (args)) | |
ddea3325 | 3559 | RETURN (SCM_SUBRF (proc) (arg1, SCM_UNDEFINED)); |
0f2d19dd JB |
3560 | while (SCM_NIMP (args)) |
3561 | { | |
3562 | SCM_ASSERT (SCM_CONSP (args), args, SCM_ARG2, "apply"); | |
3563 | arg1 = SCM_SUBRF (proc) (arg1, SCM_CAR (args)); | |
3564 | args = SCM_CDR (args); | |
3565 | } | |
3566 | RETURN (arg1); | |
3567 | case scm_tc7_rpsubr: | |
3568 | if (SCM_NULLP (args)) | |
3569 | RETURN (SCM_BOOL_T); | |
3570 | while (SCM_NIMP (args)) | |
3571 | { | |
3572 | SCM_ASSERT (SCM_CONSP (args), args, SCM_ARG2, "apply"); | |
3573 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg1, SCM_CAR (args)))) | |
3574 | RETURN (SCM_BOOL_F); | |
3575 | arg1 = SCM_CAR (args); | |
3576 | args = SCM_CDR (args); | |
3577 | } | |
3578 | RETURN (SCM_BOOL_T); | |
3579 | case scm_tcs_closures: | |
3580 | #ifdef DEVAL | |
6dbd0af5 | 3581 | arg1 = (SCM_UNBNDP (arg1) ? SCM_EOL : debug.vect[0].a.args); |
0f2d19dd JB |
3582 | #else |
3583 | arg1 = (SCM_UNBNDP (arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
3584 | #endif | |
cf7c17e9 | 3585 | #ifndef SCM_RECKLESS |
726d810a | 3586 | if (scm_badargsp (SCM_CLOSURE_FORMALS (proc), arg1)) |
0f2d19dd JB |
3587 | goto wrongnumargs; |
3588 | #endif | |
1609038c MD |
3589 | |
3590 | /* Copy argument list */ | |
3591 | if (SCM_IMP (arg1)) | |
3592 | args = arg1; | |
3593 | else | |
3594 | { | |
3595 | SCM tl = args = scm_cons (SCM_CAR (arg1), SCM_UNSPECIFIED); | |
cabe682c | 3596 | while (arg1 = SCM_CDR (arg1), SCM_CONSP (arg1)) |
1609038c MD |
3597 | { |
3598 | SCM_SETCDR (tl, scm_cons (SCM_CAR (arg1), | |
3599 | SCM_UNSPECIFIED)); | |
3600 | tl = SCM_CDR (tl); | |
3601 | } | |
3602 | SCM_SETCDR (tl, arg1); | |
3603 | } | |
3604 | ||
726d810a | 3605 | args = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), args, SCM_ENV (proc)); |
2ddb0920 | 3606 | proc = SCM_CDR (SCM_CODE (proc)); |
e791c18f MD |
3607 | again: |
3608 | arg1 = proc; | |
01f11e02 | 3609 | while (!SCM_NULLP (arg1 = SCM_CDR (arg1))) |
2ddb0920 MD |
3610 | { |
3611 | if (SCM_IMP (SCM_CAR (proc))) | |
3612 | { | |
3613 | if (SCM_ISYMP (SCM_CAR (proc))) | |
3614 | { | |
3615 | proc = scm_m_expand_body (proc, args); | |
e791c18f | 3616 | goto again; |
2ddb0920 | 3617 | } |
5280aaca | 3618 | else |
17fa3fcf | 3619 | SCM_VALIDATE_NON_EMPTY_COMBINATION (SCM_CAR (proc)); |
2ddb0920 MD |
3620 | } |
3621 | else | |
e791c18f MD |
3622 | SCM_CEVAL (SCM_CAR (proc), args); |
3623 | proc = arg1; | |
2ddb0920 | 3624 | } |
e791c18f | 3625 | RETURN (EVALCAR (proc, args)); |
0717dfd8 | 3626 | case scm_tc7_smob: |
68b06924 | 3627 | if (!SCM_SMOB_APPLICABLE_P (proc)) |
0717dfd8 | 3628 | goto badproc; |
afa38f6e | 3629 | if (SCM_UNBNDP (arg1)) |
ddea3325 | 3630 | RETURN (SCM_SMOB_APPLY_0 (proc)); |
afa38f6e | 3631 | else if (SCM_NULLP (args)) |
ddea3325 | 3632 | RETURN (SCM_SMOB_APPLY_1 (proc, arg1)); |
0717dfd8 | 3633 | else if (SCM_NULLP (SCM_CDR (args))) |
ddea3325 | 3634 | RETURN (SCM_SMOB_APPLY_2 (proc, arg1, SCM_CAR (args))); |
0717dfd8 | 3635 | else |
68b06924 | 3636 | RETURN (SCM_SMOB_APPLY_3 (proc, arg1, SCM_CAR (args), SCM_CDR (args))); |
0f2d19dd JB |
3637 | case scm_tc7_cclo: |
3638 | #ifdef DEVAL | |
6dbd0af5 MD |
3639 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : debug.vect[0].a.args); |
3640 | arg1 = proc; | |
3641 | proc = SCM_CCLO_SUBR (proc); | |
3642 | debug.vect[0].a.proc = proc; | |
3643 | debug.vect[0].a.args = scm_cons (arg1, args); | |
0f2d19dd JB |
3644 | #else |
3645 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
0f2d19dd JB |
3646 | arg1 = proc; |
3647 | proc = SCM_CCLO_SUBR (proc); | |
6dbd0af5 | 3648 | #endif |
0f2d19dd | 3649 | goto tail; |
89efbff4 MD |
3650 | case scm_tc7_pws: |
3651 | proc = SCM_PROCEDURE (proc); | |
3652 | #ifdef DEVAL | |
3653 | debug.vect[0].a.proc = proc; | |
3654 | #endif | |
3655 | goto tail; | |
904a077d | 3656 | case scm_tcs_struct: |
f3d2630a MD |
3657 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) |
3658 | { | |
3659 | #ifdef DEVAL | |
3660 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : debug.vect[0].a.args); | |
3661 | #else | |
3662 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
3663 | #endif | |
195847fa | 3664 | RETURN (scm_apply_generic (proc, args)); |
f3d2630a MD |
3665 | } |
3666 | else if (!SCM_I_OPERATORP (proc)) | |
9b07e212 MD |
3667 | goto badproc; |
3668 | else | |
da7f71d7 MD |
3669 | { |
3670 | #ifdef DEVAL | |
3671 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : debug.vect[0].a.args); | |
3672 | #else | |
3673 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
3674 | #endif | |
3675 | arg1 = proc; | |
195847fa MD |
3676 | proc = (SCM_I_ENTITYP (proc) |
3677 | ? SCM_ENTITY_PROCEDURE (proc) | |
3678 | : SCM_OPERATOR_PROCEDURE (proc)); | |
da7f71d7 MD |
3679 | #ifdef DEVAL |
3680 | debug.vect[0].a.proc = proc; | |
3681 | debug.vect[0].a.args = scm_cons (arg1, args); | |
3682 | #endif | |
195847fa MD |
3683 | if (SCM_NIMP (proc)) |
3684 | goto tail; | |
3685 | else | |
3686 | goto badproc; | |
da7f71d7 | 3687 | } |
0f2d19dd | 3688 | wrongnumargs: |
f5bf2977 | 3689 | scm_wrong_num_args (proc); |
0f2d19dd JB |
3690 | default: |
3691 | badproc: | |
db4b4ca6 | 3692 | scm_wrong_type_arg ("apply", SCM_ARG1, proc); |
0f2d19dd JB |
3693 | RETURN (arg1); |
3694 | } | |
3695 | #ifdef DEVAL | |
6dbd0af5 | 3696 | exit: |
b6d75948 | 3697 | if (CHECK_EXIT && SCM_TRAPS_P) |
b7ff98dd | 3698 | if (SCM_EXIT_FRAME_P || (SCM_TRACE_P && SCM_TRACED_FRAME_P (debug))) |
6dbd0af5 | 3699 | { |
b7ff98dd MD |
3700 | SCM_CLEAR_TRACED_FRAME (debug); |
3701 | if (SCM_CHEAPTRAPS_P) | |
c0ab1b8d | 3702 | arg1 = scm_make_debugobj (&debug); |
6dbd0af5 MD |
3703 | else |
3704 | { | |
5f144b10 GH |
3705 | int first; |
3706 | SCM val = scm_make_continuation (&first); | |
3707 | ||
3708 | if (first) | |
3709 | arg1 = val; | |
3710 | else | |
6dbd0af5 | 3711 | { |
5f144b10 | 3712 | proc = val; |
6dbd0af5 MD |
3713 | goto ret; |
3714 | } | |
3715 | } | |
d95c0b76 NJ |
3716 | SCM_TRAPS_P = 0; |
3717 | scm_call_3 (SCM_EXIT_FRAME_HDLR, scm_sym_exit_frame, arg1, proc); | |
3718 | SCM_TRAPS_P = 1; | |
6dbd0af5 MD |
3719 | } |
3720 | ret: | |
1646d37b | 3721 | scm_last_debug_frame = debug.prev; |
0f2d19dd JB |
3722 | return proc; |
3723 | #endif | |
3724 | } | |
3725 | ||
6dbd0af5 MD |
3726 | |
3727 | /* SECTION: The rest of this file is only read once. | |
3728 | */ | |
3729 | ||
0f2d19dd JB |
3730 | #ifndef DEVAL |
3731 | ||
d9c393f5 JB |
3732 | /* Typechecking for multi-argument MAP and FOR-EACH. |
3733 | ||
47c3f06d | 3734 | Verify that each element of the vector ARGV, except for the first, |
d9c393f5 | 3735 | is a proper list whose length is LEN. Attribute errors to WHO, |
47c3f06d | 3736 | and claim that the i'th element of ARGV is WHO's i+2'th argument. */ |
d9c393f5 | 3737 | static inline void |
47c3f06d | 3738 | check_map_args (SCM argv, |
c014a02e | 3739 | long len, |
47c3f06d MD |
3740 | SCM gf, |
3741 | SCM proc, | |
3742 | SCM args, | |
3743 | const char *who) | |
d9c393f5 | 3744 | { |
47c3f06d | 3745 | SCM *ve = SCM_VELTS (argv); |
c014a02e | 3746 | long i; |
d9c393f5 | 3747 | |
b5c2579a | 3748 | for (i = SCM_VECTOR_LENGTH (argv) - 1; i >= 1; i--) |
d9c393f5 | 3749 | { |
c014a02e | 3750 | long elt_len = scm_ilength (ve[i]); |
d9c393f5 JB |
3751 | |
3752 | if (elt_len < 0) | |
47c3f06d MD |
3753 | { |
3754 | if (gf) | |
3755 | scm_apply_generic (gf, scm_cons (proc, args)); | |
3756 | else | |
3757 | scm_wrong_type_arg (who, i + 2, ve[i]); | |
3758 | } | |
d9c393f5 JB |
3759 | |
3760 | if (elt_len != len) | |
3761 | scm_out_of_range (who, ve[i]); | |
3762 | } | |
3763 | ||
5d2b97cd | 3764 | scm_remember_upto_here_1 (argv); |
d9c393f5 JB |
3765 | } |
3766 | ||
3767 | ||
47c3f06d | 3768 | SCM_GPROC (s_map, "map", 2, 0, 1, scm_map, g_map); |
1cc91f1b | 3769 | |
368bf056 MD |
3770 | /* Note: Currently, scm_map applies PROC to the argument list(s) |
3771 | sequentially, starting with the first element(s). This is used in | |
8878f040 | 3772 | evalext.c where the Scheme procedure `map-in-order', which guarantees |
368bf056 | 3773 | sequential behaviour, is implemented using scm_map. If the |
8878f040 | 3774 | behaviour changes, we need to update `map-in-order'. |
368bf056 MD |
3775 | */ |
3776 | ||
0f2d19dd | 3777 | SCM |
1bbd0b84 | 3778 | scm_map (SCM proc, SCM arg1, SCM args) |
af45e3b0 | 3779 | #define FUNC_NAME s_map |
0f2d19dd | 3780 | { |
c014a02e | 3781 | long i, len; |
0f2d19dd JB |
3782 | SCM res = SCM_EOL; |
3783 | SCM *pres = &res; | |
3784 | SCM *ve = &args; /* Keep args from being optimized away. */ | |
3785 | ||
d9c393f5 | 3786 | len = scm_ilength (arg1); |
47c3f06d MD |
3787 | SCM_GASSERTn (len >= 0, |
3788 | g_map, scm_cons2 (proc, arg1, args), SCM_ARG2, s_map); | |
af45e3b0 | 3789 | SCM_VALIDATE_REST_ARGUMENT (args); |
0f2d19dd JB |
3790 | if (SCM_NULLP (args)) |
3791 | { | |
3792 | while (SCM_NIMP (arg1)) | |
3793 | { | |
8ea46249 | 3794 | *pres = scm_list_1 (scm_apply (proc, SCM_CAR (arg1), scm_listofnull)); |
a23afe53 | 3795 | pres = SCM_CDRLOC (*pres); |
0f2d19dd JB |
3796 | arg1 = SCM_CDR (arg1); |
3797 | } | |
3798 | return res; | |
3799 | } | |
47c3f06d | 3800 | args = scm_vector (arg1 = scm_cons (arg1, args)); |
0f2d19dd | 3801 | ve = SCM_VELTS (args); |
cf7c17e9 | 3802 | #ifndef SCM_RECKLESS |
47c3f06d | 3803 | check_map_args (args, len, g_map, proc, arg1, s_map); |
0f2d19dd JB |
3804 | #endif |
3805 | while (1) | |
3806 | { | |
3807 | arg1 = SCM_EOL; | |
b5c2579a | 3808 | for (i = SCM_VECTOR_LENGTH (args) - 1; i >= 0; i--) |
0f2d19dd | 3809 | { |
d9c393f5 JB |
3810 | if (SCM_IMP (ve[i])) |
3811 | return res; | |
0f2d19dd JB |
3812 | arg1 = scm_cons (SCM_CAR (ve[i]), arg1); |
3813 | ve[i] = SCM_CDR (ve[i]); | |
3814 | } | |
8ea46249 | 3815 | *pres = scm_list_1 (scm_apply (proc, arg1, SCM_EOL)); |
a23afe53 | 3816 | pres = SCM_CDRLOC (*pres); |
0f2d19dd JB |
3817 | } |
3818 | } | |
af45e3b0 | 3819 | #undef FUNC_NAME |
0f2d19dd JB |
3820 | |
3821 | ||
47c3f06d | 3822 | SCM_GPROC (s_for_each, "for-each", 2, 0, 1, scm_for_each, g_for_each); |
1cc91f1b | 3823 | |
0f2d19dd | 3824 | SCM |
1bbd0b84 | 3825 | scm_for_each (SCM proc, SCM arg1, SCM args) |
af45e3b0 | 3826 | #define FUNC_NAME s_for_each |
0f2d19dd JB |
3827 | { |
3828 | SCM *ve = &args; /* Keep args from being optimized away. */ | |
c014a02e | 3829 | long i, len; |
d9c393f5 | 3830 | len = scm_ilength (arg1); |
47c3f06d MD |
3831 | SCM_GASSERTn (len >= 0, g_for_each, scm_cons2 (proc, arg1, args), |
3832 | SCM_ARG2, s_for_each); | |
af45e3b0 | 3833 | SCM_VALIDATE_REST_ARGUMENT (args); |
0f2d19dd JB |
3834 | if SCM_NULLP (args) |
3835 | { | |
3836 | while SCM_NIMP (arg1) | |
3837 | { | |
0f2d19dd JB |
3838 | scm_apply (proc, SCM_CAR (arg1), scm_listofnull); |
3839 | arg1 = SCM_CDR (arg1); | |
3840 | } | |
3841 | return SCM_UNSPECIFIED; | |
3842 | } | |
47c3f06d | 3843 | args = scm_vector (arg1 = scm_cons (arg1, args)); |
0f2d19dd | 3844 | ve = SCM_VELTS (args); |
cf7c17e9 | 3845 | #ifndef SCM_RECKLESS |
47c3f06d | 3846 | check_map_args (args, len, g_for_each, proc, arg1, s_for_each); |
0f2d19dd JB |
3847 | #endif |
3848 | while (1) | |
3849 | { | |
3850 | arg1 = SCM_EOL; | |
b5c2579a | 3851 | for (i = SCM_VECTOR_LENGTH (args) - 1; i >= 0; i--) |
0f2d19dd JB |
3852 | { |
3853 | if SCM_IMP | |
3854 | (ve[i]) return SCM_UNSPECIFIED; | |
3855 | arg1 = scm_cons (SCM_CAR (ve[i]), arg1); | |
3856 | ve[i] = SCM_CDR (ve[i]); | |
3857 | } | |
3858 | scm_apply (proc, arg1, SCM_EOL); | |
3859 | } | |
3860 | } | |
af45e3b0 | 3861 | #undef FUNC_NAME |
0f2d19dd | 3862 | |
1cc91f1b | 3863 | |
0f2d19dd | 3864 | SCM |
6e8d25a6 | 3865 | scm_closure (SCM code, SCM env) |
0f2d19dd JB |
3866 | { |
3867 | register SCM z; | |
86d31dfe | 3868 | |
0f2d19dd JB |
3869 | SCM_NEWCELL (z); |
3870 | SCM_SETCODE (z, code); | |
a23afe53 | 3871 | SCM_SETENV (z, env); |
0f2d19dd JB |
3872 | return z; |
3873 | } | |
3874 | ||
3875 | ||
92c2555f | 3876 | scm_t_bits scm_tc16_promise; |
1cc91f1b | 3877 | |
0f2d19dd | 3878 | SCM |
6e8d25a6 | 3879 | scm_makprom (SCM code) |
0f2d19dd | 3880 | { |
cf498326 | 3881 | SCM_RETURN_NEWSMOB (scm_tc16_promise, SCM_UNPACK (code)); |
0f2d19dd JB |
3882 | } |
3883 | ||
3884 | ||
1cc91f1b | 3885 | |
0f2d19dd | 3886 | static int |
e841c3e0 | 3887 | promise_print (SCM exp, SCM port, scm_print_state *pstate) |
0f2d19dd | 3888 | { |
19402679 | 3889 | int writingp = SCM_WRITINGP (pstate); |
b7f3516f | 3890 | scm_puts ("#<promise ", port); |
19402679 | 3891 | SCM_SET_WRITINGP (pstate, 1); |
729dbac3 | 3892 | scm_iprin1 (SCM_CELL_OBJECT_1 (exp), port, pstate); |
19402679 | 3893 | SCM_SET_WRITINGP (pstate, writingp); |
b7f3516f | 3894 | scm_putc ('>', port); |
0f2d19dd JB |
3895 | return !0; |
3896 | } | |
3897 | ||
3898 | ||
3b3b36dd | 3899 | SCM_DEFINE (scm_force, "force", 1, 0, 0, |
67e8151b MG |
3900 | (SCM x), |
3901 | "If the promise @var{x} has not been computed yet, compute and\n" | |
3902 | "return @var{x}, otherwise just return the previously computed\n" | |
3903 | "value.") | |
1bbd0b84 | 3904 | #define FUNC_NAME s_scm_force |
0f2d19dd | 3905 | { |
445f675c DH |
3906 | SCM_VALIDATE_SMOB (1, x, promise); |
3907 | if (!((1L << 16) & SCM_CELL_WORD_0 (x))) | |
0f2d19dd | 3908 | { |
fdc28395 | 3909 | SCM ans = scm_call_0 (SCM_CELL_OBJECT_1 (x)); |
445f675c | 3910 | if (!((1L << 16) & SCM_CELL_WORD_0 (x))) |
0f2d19dd JB |
3911 | { |
3912 | SCM_DEFER_INTS; | |
445f675c DH |
3913 | SCM_SET_CELL_OBJECT_1 (x, ans); |
3914 | SCM_SET_CELL_WORD_0 (x, SCM_CELL_WORD_0 (x) | (1L << 16)); | |
0f2d19dd JB |
3915 | SCM_ALLOW_INTS; |
3916 | } | |
3917 | } | |
445f675c | 3918 | return SCM_CELL_OBJECT_1 (x); |
0f2d19dd | 3919 | } |
1bbd0b84 | 3920 | #undef FUNC_NAME |
0f2d19dd | 3921 | |
445f675c | 3922 | |
a1ec6916 | 3923 | SCM_DEFINE (scm_promise_p, "promise?", 1, 0, 0, |
67e8151b | 3924 | (SCM obj), |
b380b885 | 3925 | "Return true if @var{obj} is a promise, i.e. a delayed computation\n" |
7a095584 | 3926 | "(@pxref{Delayed evaluation,,,r5rs.info,The Revised^5 Report on Scheme}).") |
1bbd0b84 | 3927 | #define FUNC_NAME s_scm_promise_p |
0f2d19dd | 3928 | { |
67e8151b | 3929 | return SCM_BOOL (SCM_TYP16_PREDICATE (scm_tc16_promise, obj)); |
0f2d19dd | 3930 | } |
1bbd0b84 | 3931 | #undef FUNC_NAME |
0f2d19dd | 3932 | |
445f675c | 3933 | |
a1ec6916 | 3934 | SCM_DEFINE (scm_cons_source, "cons-source", 3, 0, 0, |
1bbd0b84 | 3935 | (SCM xorig, SCM x, SCM y), |
11768c04 NJ |
3936 | "Create and return a new pair whose car and cdr are @var{x} and @var{y}.\n" |
3937 | "Any source properties associated with @var{xorig} are also associated\n" | |
3938 | "with the new pair.") | |
1bbd0b84 | 3939 | #define FUNC_NAME s_scm_cons_source |
26d5b9b4 MD |
3940 | { |
3941 | SCM p, z; | |
3942 | SCM_NEWCELL (z); | |
445f675c DH |
3943 | SCM_SET_CELL_OBJECT_0 (z, x); |
3944 | SCM_SET_CELL_OBJECT_1 (z, y); | |
26d5b9b4 MD |
3945 | /* Copy source properties possibly associated with xorig. */ |
3946 | p = scm_whash_lookup (scm_source_whash, xorig); | |
445f675c | 3947 | if (!SCM_IMP (p)) |
26d5b9b4 MD |
3948 | scm_whash_insert (scm_source_whash, z, p); |
3949 | return z; | |
3950 | } | |
1bbd0b84 | 3951 | #undef FUNC_NAME |
26d5b9b4 | 3952 | |
445f675c | 3953 | |
a1ec6916 | 3954 | SCM_DEFINE (scm_copy_tree, "copy-tree", 1, 0, 0, |
1bbd0b84 | 3955 | (SCM obj), |
b380b885 MD |
3956 | "Recursively copy the data tree that is bound to @var{obj}, and return a\n" |
3957 | "pointer to the new data structure. @code{copy-tree} recurses down the\n" | |
3958 | "contents of both pairs and vectors (since both cons cells and vector\n" | |
3959 | "cells may point to arbitrary objects), and stops recursing when it hits\n" | |
3960 | "any other object.") | |
1bbd0b84 | 3961 | #define FUNC_NAME s_scm_copy_tree |
0f2d19dd JB |
3962 | { |
3963 | SCM ans, tl; | |
26d5b9b4 | 3964 | if (SCM_IMP (obj)) |
ff467021 | 3965 | return obj; |
3910272e MD |
3966 | if (SCM_VECTORP (obj)) |
3967 | { | |
c014a02e | 3968 | unsigned long i = SCM_VECTOR_LENGTH (obj); |
00ffa0e7 | 3969 | ans = scm_c_make_vector (i, SCM_UNSPECIFIED); |
3910272e MD |
3970 | while (i--) |
3971 | SCM_VELTS (ans)[i] = scm_copy_tree (SCM_VELTS (obj)[i]); | |
3972 | return ans; | |
3973 | } | |
01f11e02 | 3974 | if (!SCM_CONSP (obj)) |
0f2d19dd | 3975 | return obj; |
26d5b9b4 MD |
3976 | ans = tl = scm_cons_source (obj, |
3977 | scm_copy_tree (SCM_CAR (obj)), | |
3978 | SCM_UNSPECIFIED); | |
cabe682c | 3979 | while (obj = SCM_CDR (obj), SCM_CONSP (obj)) |
a23afe53 MD |
3980 | { |
3981 | SCM_SETCDR (tl, scm_cons (scm_copy_tree (SCM_CAR (obj)), | |
3982 | SCM_UNSPECIFIED)); | |
3983 | tl = SCM_CDR (tl); | |
3984 | } | |
3985 | SCM_SETCDR (tl, obj); | |
0f2d19dd JB |
3986 | return ans; |
3987 | } | |
1bbd0b84 | 3988 | #undef FUNC_NAME |
0f2d19dd | 3989 | |
1cc91f1b | 3990 | |
4163eb72 MV |
3991 | /* We have three levels of EVAL here: |
3992 | ||
3993 | - scm_i_eval (exp, env) | |
3994 | ||
3995 | evaluates EXP in environment ENV. ENV is a lexical environment | |
3996 | structure as used by the actual tree code evaluator. When ENV is | |
3997 | a top-level environment, then changes to the current module are | |
a513ead3 | 3998 | tracked by updating ENV so that it continues to be in sync with |
4163eb72 MV |
3999 | the current module. |
4000 | ||
4001 | - scm_primitive_eval (exp) | |
4002 | ||
4003 | evaluates EXP in the top-level environment as determined by the | |
4004 | current module. This is done by constructing a suitable | |
4005 | environment and calling scm_i_eval. Thus, changes to the | |
4006 | top-level module are tracked normally. | |
4007 | ||
4008 | - scm_eval (exp, mod) | |
4009 | ||
a513ead3 | 4010 | evaluates EXP while MOD is the current module. This is done by |
4163eb72 MV |
4011 | setting the current module to MOD, invoking scm_primitive_eval on |
4012 | EXP, and then restoring the current module to the value it had | |
4013 | previously. That is, while EXP is evaluated, changes to the | |
4014 | current module are tracked, but these changes do not persist when | |
4015 | scm_eval returns. | |
4016 | ||
4017 | For each level of evals, there are two variants, distinguished by a | |
4018 | _x suffix: the ordinary variant does not modify EXP while the _x | |
4019 | variant can destructively modify EXP into something completely | |
4020 | unintelligible. A Scheme data structure passed as EXP to one of the | |
4021 | _x variants should not ever be used again for anything. So when in | |
4022 | doubt, use the ordinary variant. | |
4023 | ||
4024 | */ | |
4025 | ||
0f2d19dd | 4026 | SCM |
68d8be66 | 4027 | scm_i_eval_x (SCM exp, SCM env) |
0f2d19dd | 4028 | { |
68d8be66 | 4029 | return SCM_XEVAL (exp, env); |
0f2d19dd JB |
4030 | } |
4031 | ||
68d8be66 MD |
4032 | SCM |
4033 | scm_i_eval (SCM exp, SCM env) | |
4034 | { | |
26fb6390 | 4035 | exp = scm_copy_tree (exp); |
e37a4fba | 4036 | return SCM_XEVAL (exp, env); |
68d8be66 MD |
4037 | } |
4038 | ||
4039 | SCM | |
4163eb72 | 4040 | scm_primitive_eval_x (SCM exp) |
0f2d19dd | 4041 | { |
a513ead3 | 4042 | SCM env; |
bcdab802 | 4043 | SCM transformer = scm_current_module_transformer (); |
a513ead3 | 4044 | if (SCM_NIMP (transformer)) |
fdc28395 | 4045 | exp = scm_call_1 (transformer, exp); |
a513ead3 | 4046 | env = scm_top_level_env (scm_current_module_lookup_closure ()); |
4163eb72 | 4047 | return scm_i_eval_x (exp, env); |
0f2d19dd JB |
4048 | } |
4049 | ||
4163eb72 MV |
4050 | SCM_DEFINE (scm_primitive_eval, "primitive-eval", 1, 0, 0, |
4051 | (SCM exp), | |
2069af38 | 4052 | "Evaluate @var{exp} in the top-level environment specified by\n" |
4163eb72 MV |
4053 | "the current module.") |
4054 | #define FUNC_NAME s_scm_primitive_eval | |
4055 | { | |
a513ead3 | 4056 | SCM env; |
bcdab802 | 4057 | SCM transformer = scm_current_module_transformer (); |
a513ead3 | 4058 | if (SCM_NIMP (transformer)) |
fdc28395 | 4059 | exp = scm_call_1 (transformer, exp); |
a513ead3 | 4060 | env = scm_top_level_env (scm_current_module_lookup_closure ()); |
4163eb72 MV |
4061 | return scm_i_eval (exp, env); |
4062 | } | |
4063 | #undef FUNC_NAME | |
4064 | ||
68d8be66 MD |
4065 | /* Eval does not take the second arg optionally. This is intentional |
4066 | * in order to be R5RS compatible, and to prepare for the new module | |
4067 | * system, where we would like to make the choice of evaluation | |
4163eb72 | 4068 | * environment explicit. */ |
549e6ec6 | 4069 | |
09074dbf DH |
4070 | static void |
4071 | change_environment (void *data) | |
4072 | { | |
4073 | SCM pair = SCM_PACK (data); | |
4074 | SCM new_module = SCM_CAR (pair); | |
aa767bc5 | 4075 | SCM old_module = scm_current_module (); |
09074dbf | 4076 | SCM_SETCDR (pair, old_module); |
aa767bc5 | 4077 | scm_set_current_module (new_module); |
09074dbf DH |
4078 | } |
4079 | ||
4080 | ||
09074dbf DH |
4081 | static void |
4082 | restore_environment (void *data) | |
4083 | { | |
4084 | SCM pair = SCM_PACK (data); | |
4085 | SCM old_module = SCM_CDR (pair); | |
aa767bc5 | 4086 | SCM new_module = scm_current_module (); |
2e9c835d | 4087 | SCM_SETCAR (pair, new_module); |
aa767bc5 | 4088 | scm_set_current_module (old_module); |
09074dbf DH |
4089 | } |
4090 | ||
4163eb72 MV |
4091 | static SCM |
4092 | inner_eval_x (void *data) | |
4093 | { | |
4094 | return scm_primitive_eval_x (SCM_PACK(data)); | |
4095 | } | |
4096 | ||
4097 | SCM | |
4098 | scm_eval_x (SCM exp, SCM module) | |
4099 | #define FUNC_NAME "eval!" | |
4100 | { | |
4101 | SCM_VALIDATE_MODULE (2, module); | |
4102 | ||
4103 | return scm_internal_dynamic_wind | |
4104 | (change_environment, inner_eval_x, restore_environment, | |
4105 | (void *) SCM_UNPACK (exp), | |
4106 | (void *) SCM_UNPACK (scm_cons (module, SCM_BOOL_F))); | |
4107 | } | |
4108 | #undef FUNC_NAME | |
4109 | ||
4110 | static SCM | |
4111 | inner_eval (void *data) | |
4112 | { | |
4113 | return scm_primitive_eval (SCM_PACK(data)); | |
4114 | } | |
09074dbf | 4115 | |
68d8be66 | 4116 | SCM_DEFINE (scm_eval, "eval", 2, 0, 0, |
4163eb72 MV |
4117 | (SCM exp, SCM module), |
4118 | "Evaluate @var{exp}, a list representing a Scheme expression,\n" | |
4119 | "in the top-level environment specified by @var{module}.\n" | |
8f85c0c6 | 4120 | "While @var{exp} is evaluated (using @code{primitive-eval}),\n" |
4163eb72 MV |
4121 | "@var{module} is made the current module. The current module\n" |
4122 | "is reset to its previous value when @var{eval} returns.") | |
1bbd0b84 | 4123 | #define FUNC_NAME s_scm_eval |
0f2d19dd | 4124 | { |
4163eb72 | 4125 | SCM_VALIDATE_MODULE (2, module); |
09074dbf DH |
4126 | |
4127 | return scm_internal_dynamic_wind | |
4128 | (change_environment, inner_eval, restore_environment, | |
4163eb72 MV |
4129 | (void *) SCM_UNPACK (exp), |
4130 | (void *) SCM_UNPACK (scm_cons (module, SCM_BOOL_F))); | |
0f2d19dd | 4131 | } |
1bbd0b84 | 4132 | #undef FUNC_NAME |
0f2d19dd | 4133 | |
6dbd0af5 MD |
4134 | |
4135 | /* At this point, scm_deval and scm_dapply are generated. | |
4136 | */ | |
4137 | ||
0f2d19dd | 4138 | #ifdef DEBUG_EXTENSIONS |
6dbd0af5 MD |
4139 | # define DEVAL |
4140 | # include "eval.c" | |
0f2d19dd JB |
4141 | #endif |
4142 | ||
4143 | ||
1cc91f1b | 4144 | |
0f2d19dd JB |
4145 | void |
4146 | scm_init_eval () | |
0f2d19dd | 4147 | { |
33b97402 MD |
4148 | scm_init_opts (scm_evaluator_traps, |
4149 | scm_evaluator_trap_table, | |
4150 | SCM_N_EVALUATOR_TRAPS); | |
4151 | scm_init_opts (scm_eval_options_interface, | |
4152 | scm_eval_opts, | |
4153 | SCM_N_EVAL_OPTIONS); | |
4154 | ||
f99c9c28 MD |
4155 | scm_tc16_promise = scm_make_smob_type ("promise", 0); |
4156 | scm_set_smob_mark (scm_tc16_promise, scm_markcdr); | |
e841c3e0 | 4157 | scm_set_smob_print (scm_tc16_promise, promise_print); |
b8229a3b | 4158 | |
7c33806a | 4159 | /* Dirk:Fixme:: make scm_undefineds local to eval.c: it's only used here. */ |
8ea46249 | 4160 | scm_undefineds = scm_list_1 (SCM_UNDEFINED); |
7c33806a | 4161 | SCM_SETCDR (scm_undefineds, scm_undefineds); |
8ea46249 | 4162 | scm_listofnull = scm_list_1 (SCM_EOL); |
7c33806a | 4163 | |
9a441ddb | 4164 | scm_f_apply = scm_c_define_subr ("apply", scm_tc7_lsubr_2, scm_apply); |
0f2d19dd | 4165 | |
86d31dfe MV |
4166 | /* acros */ |
4167 | /* end of acros */ | |
4168 | ||
8dc9439f | 4169 | #ifndef SCM_MAGIC_SNARFER |
a0599745 | 4170 | #include "libguile/eval.x" |
8dc9439f | 4171 | #endif |
25eaf21a | 4172 | |
86d31dfe | 4173 | scm_c_define ("nil", scm_lisp_nil); |
1385d8ae | 4174 | scm_c_define ("t", scm_lisp_t); |
86d31dfe | 4175 | |
25eaf21a | 4176 | scm_add_feature ("delay"); |
0f2d19dd | 4177 | } |
0f2d19dd | 4178 | |
6dbd0af5 | 4179 | #endif /* !DEVAL */ |
89e00824 ML |
4180 | |
4181 | /* | |
4182 | Local Variables: | |
4183 | c-file-style: "gnu" | |
4184 | End: | |
4185 | */ |