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d9c393f5 | 1 | /* Copyright (C) 1995,1996,1997,1998, 1999 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. */ |
0f2d19dd JB |
41 | \f |
42 | ||
6dbd0af5 MD |
43 | /* This file is read twice in order to produce debugging versions of |
44 | * scm_ceval and scm_apply. These functions, scm_deval and | |
45 | * scm_dapply, are produced when we define the preprocessor macro | |
46 | * DEVAL. The file is divided into sections which are treated | |
47 | * differently with respect to DEVAL. The heads of these sections are | |
48 | * marked with the string "SECTION:". | |
49 | */ | |
50 | ||
51 | ||
52 | /* SECTION: This code is compiled once. | |
0f2d19dd JB |
53 | */ |
54 | ||
55 | #ifndef DEVAL | |
56 | ||
d16332b3 JB |
57 | /* We need this to get the definitions for HAVE_ALLOCA_H, etc. */ |
58 | #include "scmconfig.h" | |
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 | |
68 | #pragma alloca | |
69 | # else | |
70 | # ifndef alloca /* predefined by HP cc +Olibcalls */ | |
71 | char *alloca (); | |
72 | # endif | |
73 | # endif | |
74 | # endif | |
75 | #endif | |
76 | ||
0f2d19dd JB |
77 | #include <stdio.h> |
78 | #include "_scm.h" | |
20e6290e | 79 | #include "debug.h" |
20e6290e | 80 | #include "alist.h" |
20e6290e JB |
81 | #include "eq.h" |
82 | #include "continuations.h" | |
83 | #include "throw.h" | |
84 | #include "smob.h" | |
6cb702da | 85 | #include "macros.h" |
20e6290e JB |
86 | #include "procprop.h" |
87 | #include "hashtab.h" | |
ac46ab16 | 88 | #include "hash.h" |
20e6290e JB |
89 | #include "srcprop.h" |
90 | #include "stackchk.h" | |
0c32d76c MD |
91 | #include "objects.h" |
92 | #include "feature.h" | |
185905af | 93 | #include "modules.h" |
20e6290e JB |
94 | |
95 | #include "eval.h" | |
89efbff4 MD |
96 | |
97 | void (*scm_memoize_method) (SCM, SCM); | |
98 | ||
0f2d19dd JB |
99 | \f |
100 | ||
6dbd0af5 MD |
101 | /* The evaluator contains a plethora of EVAL symbols. |
102 | * This is an attempt at explanation. | |
103 | * | |
104 | * The following macros should be used in code which is read twice | |
105 | * (where the choice of evaluator is hard soldered): | |
106 | * | |
107 | * SCM_CEVAL is the symbol used within one evaluator to call itself. | |
108 | * Originally, it is defined to scm_ceval, but is redefined to | |
109 | * scm_deval during the second pass. | |
110 | * | |
111 | * SIDEVAL corresponds to SCM_CEVAL, but is used in situations where | |
112 | * only side effects of expressions matter. All immediates are | |
113 | * ignored. | |
114 | * | |
6cb702da | 115 | * SCM_EVALIM is used when it is known that the expression is an |
6dbd0af5 MD |
116 | * immediate. (This macro never calls an evaluator.) |
117 | * | |
118 | * EVALCAR evaluates the car of an expression. | |
119 | * | |
120 | * EVALCELLCAR is like EVALCAR, but is used when it is known that the | |
121 | * car is a lisp cell. | |
122 | * | |
123 | * The following macros should be used in code which is read once | |
124 | * (where the choice of evaluator is dynamic): | |
125 | * | |
6cb702da | 126 | * SCM_XEVAL takes care of immediates without calling an evaluator. It |
6dbd0af5 MD |
127 | * then calls scm_ceval *or* scm_deval, depending on the debugging |
128 | * mode. | |
129 | * | |
6cb702da | 130 | * SCM_XEVALCAR corresponds to EVALCAR, but uses scm_ceval *or* scm_deval |
6dbd0af5 MD |
131 | * depending on the debugging mode. |
132 | * | |
133 | * The main motivation for keeping this plethora is efficiency | |
134 | * together with maintainability (=> locality of code). | |
135 | */ | |
136 | ||
6cb702da | 137 | #define SCM_CEVAL scm_ceval |
ff467021 | 138 | #define SIDEVAL(x, env) if (SCM_NIMP(x)) SCM_CEVAL((x), (env)) |
6cb702da | 139 | |
0f2d19dd | 140 | #define EVALCELLCAR(x, env) (SCM_SYMBOLP (SCM_CAR(x)) \ |
26d5b9b4 | 141 | ? *scm_lookupcar(x, env, 1) \ |
0f2d19dd JB |
142 | : SCM_CEVAL(SCM_CAR(x), env)) |
143 | ||
0f2d19dd JB |
144 | #define EVALCAR(x, env) (SCM_NCELLP(SCM_CAR(x))\ |
145 | ? (SCM_IMP(SCM_CAR(x)) \ | |
6cb702da | 146 | ? SCM_EVALIM(SCM_CAR(x), env) \ |
0f2d19dd JB |
147 | : SCM_GLOC_VAL(SCM_CAR(x))) \ |
148 | : EVALCELLCAR(x, env)) | |
0f2d19dd | 149 | |
e2806c10 | 150 | #define EXTEND_ENV SCM_EXTEND_ENV |
0f2d19dd JB |
151 | |
152 | #ifdef MEMOIZE_LOCALS | |
1cc91f1b | 153 | |
0f2d19dd JB |
154 | SCM * |
155 | scm_ilookup (iloc, env) | |
156 | SCM iloc; | |
157 | SCM env; | |
0f2d19dd JB |
158 | { |
159 | register int ir = SCM_IFRAME (iloc); | |
160 | register SCM er = env; | |
161 | for (; 0 != ir; --ir) | |
162 | er = SCM_CDR (er); | |
163 | er = SCM_CAR (er); | |
164 | for (ir = SCM_IDIST (iloc); 0 != ir; --ir) | |
165 | er = SCM_CDR (er); | |
166 | if (SCM_ICDRP (iloc)) | |
a23afe53 MD |
167 | return SCM_CDRLOC (er); |
168 | return SCM_CARLOC (SCM_CDR (er)); | |
0f2d19dd JB |
169 | } |
170 | #endif | |
171 | ||
f8769b1d MV |
172 | #ifdef USE_THREADS |
173 | ||
174 | /* The Lookup Car Race | |
175 | - by Eva Luator | |
176 | ||
177 | Memoization of variables and special forms is done while executing | |
178 | the code for the first time. As long as there is only one thread | |
179 | everything is fine, but as soon as two threads execute the same | |
180 | code concurrently `for the first time' they can come into conflict. | |
181 | ||
182 | This memoization includes rewriting variable references into more | |
183 | efficient forms and expanding macros. Furthermore, macro expansion | |
184 | includes `compiling' special forms like `let', `cond', etc. into | |
185 | tree-code instructions. | |
186 | ||
187 | There shouldn't normally be a problem with memoizing local and | |
188 | global variable references (into ilocs and glocs), because all | |
189 | threads will mutate the code in *exactly* the same way and (if I | |
190 | read the C code correctly) it is not possible to observe a half-way | |
191 | mutated cons cell. The lookup procedure can handle this | |
192 | transparently without any critical sections. | |
193 | ||
194 | It is different with macro expansion, because macro expansion | |
195 | happens outside of the lookup procedure and can't be | |
196 | undone. Therefore it can't cope with it. It has to indicate | |
197 | failure when it detects a lost race and hope that the caller can | |
198 | handle it. Luckily, it turns out that this is the case. | |
199 | ||
200 | An example to illustrate this: Suppose that the follwing form will | |
201 | be memoized concurrently by two threads | |
202 | ||
203 | (let ((x 12)) x) | |
204 | ||
205 | Let's first examine the lookup of X in the body. The first thread | |
206 | decides that it has to find the symbol "x" in the environment and | |
207 | starts to scan it. Then the other thread takes over and actually | |
208 | overtakes the first. It looks up "x" and substitutes an | |
209 | appropriate iloc for it. Now the first thread continues and | |
210 | completes its lookup. It comes to exactly the same conclusions as | |
211 | the second one and could - without much ado - just overwrite the | |
212 | iloc with the same iloc. | |
213 | ||
214 | But let's see what will happen when the race occurs while looking | |
215 | up the symbol "let" at the start of the form. It could happen that | |
216 | the second thread interrupts the lookup of the first thread and not | |
217 | only substitutes a gloc for it but goes right ahead and replaces it | |
218 | with the compiled form (#@let* (x 12) x). Now, when the first | |
219 | thread completes its lookup, it would replace the #@let* with a | |
220 | gloc pointing to the "let" binding, effectively reverting the form | |
221 | to (let (x 12) x). This is wrong. It has to detect that it has | |
222 | lost the race and the evaluator has to reconsider the changed form | |
223 | completely. | |
224 | ||
225 | This race condition could be resolved with some kind of traffic | |
226 | light (like mutexes) around scm_lookupcar, but I think that it is | |
227 | best to avoid them in this case. They would serialize memoization | |
228 | completely and because lookup involves calling arbitrary Scheme | |
229 | code (via the lookup-thunk), threads could be blocked for an | |
230 | arbitrary amount of time or even deadlock. But with the current | |
231 | solution a lot of unnecessary work is potentially done. */ | |
232 | ||
233 | /* SCM_LOOKUPCAR1 is was SCM_LOOKUPCAR used to be but is allowed to | |
234 | return NULL to indicate a failed lookup due to some race conditions | |
235 | between threads. This only happens when VLOC is the first cell of | |
236 | a special form that will eventually be memoized (like `let', etc.) | |
237 | In that case the whole lookup is bogus and the caller has to | |
238 | reconsider the complete special form. | |
239 | ||
240 | SCM_LOOKUPCAR is still there, of course. It just calls | |
241 | SCM_LOOKUPCAR1 and aborts on recieving NULL. So SCM_LOOKUPCAR | |
242 | should only be called when it is known that VLOC is not the first | |
243 | pair of a special form. Otherwise, use SCM_LOOKUPCAR1 and check | |
26d5b9b4 MD |
244 | for NULL. I think I've found the only places where this |
245 | applies. */ | |
f8769b1d MV |
246 | |
247 | #endif /* USE_THREADS */ | |
1cc91f1b | 248 | |
26d5b9b4 MD |
249 | /* scm_lookupcar returns a pointer to this when a variable could not |
250 | be found and it should not throw an error. Never assign to this. | |
251 | */ | |
252 | static scm_cell undef_cell = { SCM_UNDEFINED, SCM_UNDEFINED }; | |
253 | ||
d0b7bad7 | 254 | #ifdef USE_THREADS |
8ecf1f13 | 255 | static SCM * |
26d5b9b4 | 256 | scm_lookupcar1 (SCM vloc, SCM genv, int check) |
d0b7bad7 MD |
257 | #else |
258 | SCM * | |
26d5b9b4 | 259 | scm_lookupcar (SCM vloc, SCM genv, int check) |
d0b7bad7 | 260 | #endif |
0f2d19dd JB |
261 | { |
262 | SCM env = genv; | |
e3173f93 JB |
263 | register SCM *al, fl, var = SCM_CAR (vloc); |
264 | #ifdef USE_THREADS | |
265 | register SCM var2 = var; | |
266 | #endif | |
0f2d19dd JB |
267 | #ifdef MEMOIZE_LOCALS |
268 | register SCM iloc = SCM_ILOC00; | |
269 | #endif | |
270 | for (; SCM_NIMP (env); env = SCM_CDR (env)) | |
271 | { | |
272 | if (SCM_BOOL_T == scm_procedure_p (SCM_CAR (env))) | |
273 | break; | |
a23afe53 | 274 | al = SCM_CARLOC (env); |
0f2d19dd JB |
275 | for (fl = SCM_CAR (*al); SCM_NIMP (fl); fl = SCM_CDR (fl)) |
276 | { | |
277 | if (SCM_NCONSP (fl)) | |
33b97402 | 278 | { |
0f2d19dd JB |
279 | if (fl == var) |
280 | { | |
281 | #ifdef MEMOIZE_LOCALS | |
f8769b1d MV |
282 | #ifdef USE_THREADS |
283 | if (SCM_CAR (vloc) != var) | |
284 | goto race; | |
285 | #endif | |
a23afe53 | 286 | SCM_SETCAR (vloc, iloc + SCM_ICDR); |
0f2d19dd | 287 | #endif |
a23afe53 | 288 | return SCM_CDRLOC (*al); |
0f2d19dd | 289 | } |
33b97402 MD |
290 | else |
291 | break; | |
292 | } | |
a23afe53 | 293 | al = SCM_CDRLOC (*al); |
0f2d19dd JB |
294 | if (SCM_CAR (fl) == var) |
295 | { | |
296 | #ifdef MEMOIZE_LOCALS | |
cf7c17e9 | 297 | #ifndef SCM_RECKLESS /* letrec inits to SCM_UNDEFINED */ |
0f2d19dd JB |
298 | if (SCM_UNBNDP (SCM_CAR (*al))) |
299 | { | |
300 | env = SCM_EOL; | |
301 | goto errout; | |
302 | } | |
f8769b1d MV |
303 | #endif |
304 | #ifdef USE_THREADS | |
305 | if (SCM_CAR (vloc) != var) | |
306 | goto race; | |
0f2d19dd | 307 | #endif |
a23afe53 | 308 | SCM_SETCAR (vloc, iloc); |
0f2d19dd | 309 | #endif |
a23afe53 | 310 | return SCM_CARLOC (*al); |
0f2d19dd JB |
311 | } |
312 | #ifdef MEMOIZE_LOCALS | |
313 | iloc += SCM_IDINC; | |
314 | #endif | |
315 | } | |
316 | #ifdef MEMOIZE_LOCALS | |
317 | iloc = (~SCM_IDSTMSK) & (iloc + SCM_IFRINC); | |
318 | #endif | |
319 | } | |
320 | { | |
321 | SCM top_thunk, vcell; | |
322 | if (SCM_NIMP(env)) | |
323 | { | |
324 | top_thunk = SCM_CAR(env); /* env now refers to a top level env thunk */ | |
325 | env = SCM_CDR (env); | |
326 | } | |
327 | else | |
328 | top_thunk = SCM_BOOL_F; | |
329 | vcell = scm_sym2vcell (var, top_thunk, SCM_BOOL_F); | |
330 | if (vcell == SCM_BOOL_F) | |
331 | goto errout; | |
332 | else | |
333 | var = vcell; | |
334 | } | |
cf7c17e9 | 335 | #ifndef SCM_RECKLESS |
0f2d19dd JB |
336 | if (SCM_NNULLP (env) || SCM_UNBNDP (SCM_CDR (var))) |
337 | { | |
338 | var = SCM_CAR (var); | |
339 | errout: | |
f5bf2977 | 340 | /* scm_everr (vloc, genv,...) */ |
26d5b9b4 MD |
341 | if (check) |
342 | scm_misc_error (NULL, | |
343 | SCM_NULLP (env) | |
344 | ? "Unbound variable: %S" | |
345 | : "Damaged environment: %S", | |
346 | scm_listify (var, SCM_UNDEFINED)); | |
347 | else | |
348 | return SCM_CDRLOC (&undef_cell); | |
0f2d19dd JB |
349 | } |
350 | #endif | |
f8769b1d MV |
351 | #ifdef USE_THREADS |
352 | if (SCM_CAR (vloc) != var2) | |
353 | { | |
354 | /* Some other thread has changed the very cell we are working | |
355 | on. In effect, it must have done our job or messed it up | |
356 | completely. */ | |
357 | race: | |
358 | var = SCM_CAR (vloc); | |
359 | if ((var & 7) == 1) | |
360 | return SCM_GLOC_VAL_LOC (var); | |
361 | #ifdef MEMOIZE_LOCALS | |
362 | if ((var & 127) == (127 & SCM_ILOC00)) | |
363 | return scm_ilookup (var, genv); | |
364 | #endif | |
365 | /* We can't cope with anything else than glocs and ilocs. When | |
366 | a special form has been memoized (i.e. `let' into `#@let') we | |
367 | return NULL and expect the calling function to do the right | |
368 | thing. For the evaluator, this means going back and redoing | |
369 | the dispatch on the car of the form. */ | |
370 | return NULL; | |
371 | } | |
372 | #endif /* USE_THREADS */ | |
373 | ||
a23afe53 | 374 | SCM_SETCAR (vloc, var + 1); |
0f2d19dd | 375 | /* Except wait...what if the var is not a vcell, |
f8769b1d | 376 | * but syntax or something.... */ |
a23afe53 | 377 | return SCM_CDRLOC (var); |
0f2d19dd JB |
378 | } |
379 | ||
f8769b1d MV |
380 | #ifdef USE_THREADS |
381 | SCM * | |
26d5b9b4 | 382 | scm_lookupcar (vloc, genv, check) |
f8769b1d MV |
383 | SCM vloc; |
384 | SCM genv; | |
26d5b9b4 | 385 | int check; |
f8769b1d | 386 | { |
26d5b9b4 | 387 | SCM *loc = scm_lookupcar1 (vloc, genv, check); |
f8769b1d MV |
388 | if (loc == NULL) |
389 | abort (); | |
390 | return loc; | |
391 | } | |
f8769b1d MV |
392 | #endif |
393 | ||
0f2d19dd | 394 | #define unmemocar scm_unmemocar |
1cc91f1b | 395 | |
0f2d19dd JB |
396 | SCM |
397 | scm_unmemocar (form, env) | |
398 | SCM form; | |
399 | SCM env; | |
0f2d19dd | 400 | { |
6dbd0af5 | 401 | #ifdef DEBUG_EXTENSIONS |
0f2d19dd | 402 | register int ir; |
6dbd0af5 | 403 | #endif |
0f2d19dd JB |
404 | SCM c; |
405 | ||
406 | if (SCM_IMP (form)) | |
407 | return form; | |
408 | c = SCM_CAR (form); | |
409 | if (1 == (c & 7)) | |
a23afe53 | 410 | SCM_SETCAR (form, SCM_CAR (c - 1)); |
0f2d19dd | 411 | #ifdef MEMOIZE_LOCALS |
6dbd0af5 | 412 | #ifdef DEBUG_EXTENSIONS |
0f2d19dd JB |
413 | else if (SCM_ILOCP (c)) |
414 | { | |
415 | for (ir = SCM_IFRAME (c); ir != 0; --ir) | |
416 | env = SCM_CDR (env); | |
417 | env = SCM_CAR (SCM_CAR (env)); | |
418 | for (ir = SCM_IDIST (c); ir != 0; --ir) | |
419 | env = SCM_CDR (env); | |
a23afe53 | 420 | SCM_SETCAR (form, SCM_ICDRP (c) ? env : SCM_CAR (env)); |
0f2d19dd | 421 | } |
6dbd0af5 | 422 | #endif |
0f2d19dd JB |
423 | #endif |
424 | return form; | |
425 | } | |
426 | ||
1cc91f1b | 427 | |
0f2d19dd JB |
428 | SCM |
429 | scm_eval_car (pair, env) | |
430 | SCM pair; | |
431 | SCM env; | |
0f2d19dd | 432 | { |
6cb702da | 433 | return SCM_XEVALCAR (pair, env); |
0f2d19dd JB |
434 | } |
435 | ||
436 | \f | |
437 | /* | |
438 | * The following rewrite expressions and | |
439 | * some memoized forms have different syntax | |
440 | */ | |
441 | ||
3eeba8d4 JB |
442 | const char scm_s_expression[] = "missing or extra expression"; |
443 | const char scm_s_test[] = "bad test"; | |
444 | const char scm_s_body[] = "bad body"; | |
445 | const char scm_s_bindings[] = "bad bindings"; | |
446 | const char scm_s_variable[] = "bad variable"; | |
447 | const char scm_s_clauses[] = "bad or missing clauses"; | |
448 | const char scm_s_formals[] = "bad formals"; | |
0f2d19dd | 449 | |
2f0d1375 | 450 | SCM scm_sym_dot, scm_sym_arrow, scm_sym_else, scm_sym_unquote, scm_sym_uq_splicing, scm_sym_apply; |
b8229a3b | 451 | |
6dbd0af5 | 452 | #ifdef DEBUG_EXTENSIONS |
2f0d1375 MD |
453 | SCM scm_sym_enter_frame, scm_sym_apply_frame, scm_sym_exit_frame; |
454 | SCM scm_sym_trace; | |
6dbd0af5 | 455 | #endif |
0f2d19dd JB |
456 | |
457 | #define ASRTSYNTAX(cond_, msg_) if(!(cond_))scm_wta(xorig, (msg_), what); | |
458 | ||
459 | ||
1cc91f1b | 460 | |
e4755e5c | 461 | static void bodycheck SCM_P ((SCM xorig, SCM *bodyloc, const char *what)); |
1cc91f1b | 462 | |
0f2d19dd JB |
463 | static void |
464 | bodycheck (xorig, bodyloc, what) | |
465 | SCM xorig; | |
466 | SCM *bodyloc; | |
e4755e5c | 467 | const char *what; |
0f2d19dd | 468 | { |
6cb702da | 469 | ASRTSYNTAX (scm_ilength (*bodyloc) >= 1, scm_s_expression); |
0f2d19dd JB |
470 | } |
471 | ||
26d5b9b4 MD |
472 | /* Check that the body denoted by XORIG is valid and rewrite it into |
473 | its internal form. The internal form of a body is just the body | |
474 | itself, but prefixed with an ISYM that denotes to what kind of | |
475 | outer construct this body belongs. A lambda body starts with | |
476 | SCM_IM_LAMBDA, for example, a body of a let starts with SCM_IM_LET, | |
477 | etc. The one exception is a body that belongs to a letrec that has | |
478 | been formed by rewriting internal defines: it starts with | |
479 | SCM_IM_DEFINE. */ | |
480 | ||
481 | /* XXX - Besides controlling the rewriting of internal defines, the | |
482 | additional ISYM could be used for improved error messages. | |
483 | This is not done yet. */ | |
484 | ||
485 | static SCM | |
486 | scm_m_body (op, xorig, what) | |
487 | SCM op; | |
488 | SCM xorig; | |
489 | char *what; | |
490 | { | |
491 | ASRTSYNTAX (scm_ilength (xorig) >= 1, scm_s_expression); | |
492 | ||
493 | /* Don't add another ISYM if one is present already. */ | |
494 | if (SCM_ISYMP (SCM_CAR (xorig))) | |
495 | return xorig; | |
496 | ||
497 | /* Retain possible doc string. */ | |
498 | if (SCM_IMP (SCM_CAR(xorig)) || SCM_NCONSP (SCM_CAR (xorig))) | |
499 | { | |
500 | if (SCM_NNULLP (SCM_CDR(xorig))) | |
501 | return scm_cons (SCM_CAR (xorig), | |
502 | scm_m_body (op, SCM_CDR(xorig), what)); | |
503 | return xorig; | |
504 | } | |
505 | ||
506 | return scm_cons2 (op, SCM_CAR (xorig), SCM_CDR(xorig)); | |
507 | } | |
508 | ||
b8229a3b | 509 | SCM_SYNTAX(s_quote,"quote", scm_makmmacro, scm_m_quote); |
2f0d1375 | 510 | SCM_GLOBAL_SYMBOL(scm_sym_quote, s_quote); |
1cc91f1b | 511 | |
0f2d19dd JB |
512 | SCM |
513 | scm_m_quote (xorig, env) | |
514 | SCM xorig; | |
515 | SCM env; | |
0f2d19dd | 516 | { |
26d5b9b4 MD |
517 | SCM x = scm_copy_tree (SCM_CDR (xorig)); |
518 | ||
6cb702da | 519 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, |
b8229a3b | 520 | xorig, scm_s_expression, s_quote); |
3a3111a8 | 521 | return scm_cons (SCM_IM_QUOTE, x); |
0f2d19dd JB |
522 | } |
523 | ||
524 | ||
1cc91f1b | 525 | |
b8229a3b | 526 | SCM_SYNTAX(s_begin, "begin", scm_makmmacro, scm_m_begin); |
2f0d1375 | 527 | SCM_GLOBAL_SYMBOL(scm_sym_begin, s_begin); |
b8229a3b | 528 | |
0f2d19dd JB |
529 | SCM |
530 | scm_m_begin (xorig, env) | |
531 | SCM xorig; | |
532 | SCM env; | |
0f2d19dd | 533 | { |
6cb702da | 534 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) >= 1, |
b8229a3b | 535 | xorig, scm_s_expression, s_begin); |
3a3111a8 | 536 | return scm_cons (SCM_IM_BEGIN, SCM_CDR (xorig)); |
0f2d19dd JB |
537 | } |
538 | ||
b8229a3b | 539 | SCM_SYNTAX(s_if, "if", scm_makmmacro, scm_m_if); |
2f0d1375 | 540 | SCM_GLOBAL_SYMBOL(scm_sym_if, s_if); |
1cc91f1b | 541 | |
0f2d19dd JB |
542 | SCM |
543 | scm_m_if (xorig, env) | |
544 | SCM xorig; | |
545 | SCM env; | |
0f2d19dd JB |
546 | { |
547 | int len = scm_ilength (SCM_CDR (xorig)); | |
6cb702da | 548 | SCM_ASSYNT (len >= 2 && len <= 3, xorig, scm_s_expression, "if"); |
3a3111a8 | 549 | return scm_cons (SCM_IM_IF, SCM_CDR (xorig)); |
0f2d19dd JB |
550 | } |
551 | ||
552 | ||
89efbff4 MD |
553 | /* Will go into the RnRS module when Guile is factorized. |
554 | SCM_SYNTAX(scm_s_set_x,"set!", scm_makmmacro, scm_m_set_x); */ | |
555 | const char scm_s_set_x[] = "set!"; | |
556 | SCM_GLOBAL_SYMBOL(scm_sym_set_x, scm_s_set_x); | |
1cc91f1b | 557 | |
0f2d19dd | 558 | SCM |
89efbff4 | 559 | scm_m_set_x (xorig, env) |
0f2d19dd JB |
560 | SCM xorig; |
561 | SCM env; | |
0f2d19dd | 562 | { |
6dbd0af5 | 563 | SCM x = SCM_CDR (xorig); |
89efbff4 | 564 | SCM_ASSYNT (2 == scm_ilength (x), xorig, scm_s_expression, scm_s_set_x); |
6cb702da | 565 | SCM_ASSYNT (SCM_NIMP (SCM_CAR (x)) && SCM_SYMBOLP (SCM_CAR (x)), |
89efbff4 | 566 | xorig, scm_s_variable, scm_s_set_x); |
3a3111a8 | 567 | return scm_cons (SCM_IM_SET_X, x); |
0f2d19dd JB |
568 | } |
569 | ||
570 | ||
571 | #if 0 | |
1cc91f1b | 572 | |
0f2d19dd JB |
573 | SCM |
574 | scm_m_vref (xorig, env) | |
575 | SCM xorig; | |
576 | SCM env; | |
0f2d19dd JB |
577 | { |
578 | SCM x = SCM_CDR (xorig); | |
6cb702da | 579 | SCM_ASSYNT (1 == scm_ilength (x), xorig, scm_s_expression, s_vref); |
0f2d19dd JB |
580 | if (SCM_NIMP(x) && UDSCM_VARIABLEP (SCM_CAR (x))) |
581 | { | |
f5bf2977 | 582 | /* scm_everr (SCM_UNDEFINED, env,..., "global variable reference") */ |
523f5266 GH |
583 | scm_misc_error (NULL, |
584 | "Bad variable: %S", | |
585 | scm_listify (SCM_CAR (SCM_CDR (x)), SCM_UNDEFINED)); | |
0f2d19dd | 586 | } |
6cb702da MD |
587 | SCM_ASSYNT (SCM_NIMP(x) && DEFSCM_VARIABLEP (SCM_CAR (x)), |
588 | xorig, scm_s_variable, s_vref); | |
0f2d19dd JB |
589 | return scm_cons (IM_VREF, x); |
590 | } | |
591 | ||
592 | ||
1cc91f1b | 593 | |
0f2d19dd JB |
594 | SCM |
595 | scm_m_vset (xorig, env) | |
596 | SCM xorig; | |
597 | SCM env; | |
0f2d19dd JB |
598 | { |
599 | SCM x = SCM_CDR (xorig); | |
6cb702da MD |
600 | SCM_ASSYNT (3 == scm_ilength (x), xorig, scm_s_expression, s_vset); |
601 | SCM_ASSYNT ((DEFSCM_VARIABLEP (SCM_CAR (x)) | |
602 | || UDSCM_VARIABLEP (SCM_CAR (x))), | |
603 | xorig, scm_s_variable, s_vset); | |
0f2d19dd JB |
604 | return scm_cons (IM_VSET, x); |
605 | } | |
606 | #endif | |
607 | ||
608 | ||
b8229a3b | 609 | SCM_SYNTAX(s_and, "and", scm_makmmacro, scm_m_and); |
2f0d1375 | 610 | SCM_GLOBAL_SYMBOL(scm_sym_and, s_and); |
1cc91f1b | 611 | |
0f2d19dd JB |
612 | SCM |
613 | scm_m_and (xorig, env) | |
614 | SCM xorig; | |
615 | SCM env; | |
0f2d19dd JB |
616 | { |
617 | int len = scm_ilength (SCM_CDR (xorig)); | |
b8229a3b | 618 | SCM_ASSYNT (len >= 0, xorig, scm_s_test, s_and); |
0f2d19dd | 619 | if (len >= 1) |
3a3111a8 | 620 | return scm_cons (SCM_IM_AND, SCM_CDR (xorig)); |
0f2d19dd JB |
621 | else |
622 | return SCM_BOOL_T; | |
623 | } | |
624 | ||
b8229a3b | 625 | SCM_SYNTAX(s_or,"or", scm_makmmacro, scm_m_or); |
2f0d1375 | 626 | SCM_GLOBAL_SYMBOL(scm_sym_or,s_or); |
1cc91f1b | 627 | |
0f2d19dd JB |
628 | SCM |
629 | scm_m_or (xorig, env) | |
630 | SCM xorig; | |
631 | SCM env; | |
0f2d19dd JB |
632 | { |
633 | int len = scm_ilength (SCM_CDR (xorig)); | |
b8229a3b | 634 | SCM_ASSYNT (len >= 0, xorig, scm_s_test, s_or); |
0f2d19dd | 635 | if (len >= 1) |
3a3111a8 | 636 | return scm_cons (SCM_IM_OR, SCM_CDR (xorig)); |
0f2d19dd JB |
637 | else |
638 | return SCM_BOOL_F; | |
639 | } | |
640 | ||
641 | ||
b8229a3b | 642 | SCM_SYNTAX(s_case, "case", scm_makmmacro, scm_m_case); |
2f0d1375 | 643 | SCM_GLOBAL_SYMBOL(scm_sym_case, s_case); |
1cc91f1b | 644 | |
0f2d19dd JB |
645 | SCM |
646 | scm_m_case (xorig, env) | |
647 | SCM xorig; | |
648 | SCM env; | |
0f2d19dd | 649 | { |
26d5b9b4 | 650 | SCM proc, cdrx = scm_list_copy (SCM_CDR (xorig)), x = cdrx; |
b8229a3b | 651 | SCM_ASSYNT (scm_ilength (x) >= 2, xorig, scm_s_clauses, s_case); |
0f2d19dd JB |
652 | while (SCM_NIMP (x = SCM_CDR (x))) |
653 | { | |
654 | proc = SCM_CAR (x); | |
b8229a3b | 655 | SCM_ASSYNT (scm_ilength (proc) >= 2, xorig, scm_s_clauses, s_case); |
6cb702da | 656 | SCM_ASSYNT (scm_ilength (SCM_CAR (proc)) >= 0 |
2f0d1375 | 657 | || scm_sym_else == SCM_CAR (proc), |
b8229a3b | 658 | xorig, scm_s_clauses, s_case); |
0f2d19dd | 659 | } |
3a3111a8 | 660 | return scm_cons (SCM_IM_CASE, cdrx); |
0f2d19dd JB |
661 | } |
662 | ||
663 | ||
b8229a3b | 664 | SCM_SYNTAX(s_cond, "cond", scm_makmmacro, scm_m_cond); |
2f0d1375 | 665 | SCM_GLOBAL_SYMBOL(scm_sym_cond, s_cond); |
b8229a3b | 666 | |
1cc91f1b | 667 | |
0f2d19dd JB |
668 | SCM |
669 | scm_m_cond (xorig, env) | |
670 | SCM xorig; | |
671 | SCM env; | |
0f2d19dd | 672 | { |
26d5b9b4 | 673 | SCM arg1, cdrx = scm_list_copy (SCM_CDR (xorig)), x = cdrx; |
0f2d19dd | 674 | int len = scm_ilength (x); |
b8229a3b | 675 | SCM_ASSYNT (len >= 1, xorig, scm_s_clauses, s_cond); |
0f2d19dd JB |
676 | while (SCM_NIMP (x)) |
677 | { | |
678 | arg1 = SCM_CAR (x); | |
679 | len = scm_ilength (arg1); | |
b8229a3b | 680 | SCM_ASSYNT (len >= 1, xorig, scm_s_clauses, s_cond); |
2f0d1375 | 681 | if (scm_sym_else == SCM_CAR (arg1)) |
0f2d19dd | 682 | { |
6cb702da | 683 | SCM_ASSYNT (SCM_NULLP (SCM_CDR (x)) && len >= 2, |
b8229a3b | 684 | xorig, "bad ELSE clause", s_cond); |
a23afe53 | 685 | SCM_SETCAR (arg1, SCM_BOOL_T); |
0f2d19dd | 686 | } |
2f0d1375 | 687 | if (len >= 2 && scm_sym_arrow == SCM_CAR (SCM_CDR (arg1))) |
6cb702da | 688 | SCM_ASSYNT (3 == len && SCM_NIMP (SCM_CAR (SCM_CDR (SCM_CDR (arg1)))), |
b8229a3b | 689 | xorig, "bad recipient", s_cond); |
0f2d19dd JB |
690 | x = SCM_CDR (x); |
691 | } | |
3a3111a8 | 692 | return scm_cons (SCM_IM_COND, cdrx); |
0f2d19dd JB |
693 | } |
694 | ||
b8229a3b | 695 | SCM_SYNTAX(s_lambda, "lambda", scm_makmmacro, scm_m_lambda); |
2f0d1375 | 696 | SCM_GLOBAL_SYMBOL(scm_sym_lambda, s_lambda); |
1cc91f1b | 697 | |
0f2d19dd JB |
698 | SCM |
699 | scm_m_lambda (xorig, env) | |
700 | SCM xorig; | |
701 | SCM env; | |
0f2d19dd JB |
702 | { |
703 | SCM proc, x = SCM_CDR (xorig); | |
26d5b9b4 | 704 | if (scm_ilength (x) < 2) |
0f2d19dd JB |
705 | goto badforms; |
706 | proc = SCM_CAR (x); | |
33b97402 MD |
707 | if (SCM_NULLP (proc)) |
708 | goto memlambda; | |
26d5b9b4 MD |
709 | if (SCM_IM_LET == proc) /* named let */ |
710 | goto memlambda; | |
33b97402 MD |
711 | if (SCM_IMP (proc)) |
712 | goto badforms; | |
713 | if (SCM_SYMBOLP (proc)) | |
714 | goto memlambda; | |
715 | if (SCM_NCONSP (proc)) | |
716 | goto badforms; | |
717 | while (SCM_NIMP (proc)) | |
0f2d19dd | 718 | { |
33b97402 MD |
719 | if (SCM_NCONSP (proc)) |
720 | { | |
0f2d19dd | 721 | if (!SCM_SYMBOLP (proc)) |
33b97402 MD |
722 | goto badforms; |
723 | else | |
724 | goto memlambda; | |
725 | } | |
0f2d19dd JB |
726 | if (!(SCM_NIMP (SCM_CAR (proc)) && SCM_SYMBOLP (SCM_CAR (proc)))) |
727 | goto badforms; | |
728 | proc = SCM_CDR (proc); | |
729 | } | |
ff467021 | 730 | if (SCM_NNULLP (proc)) |
26d5b9b4 MD |
731 | { |
732 | badforms: | |
733 | scm_wta (xorig, scm_s_formals, s_lambda); | |
734 | } | |
735 | ||
736 | memlambda: | |
3a3111a8 MD |
737 | return scm_cons2 (SCM_IM_LAMBDA, SCM_CAR (x), |
738 | scm_m_body (SCM_IM_LAMBDA, SCM_CDR (x), s_lambda)); | |
0f2d19dd JB |
739 | } |
740 | ||
b8229a3b | 741 | SCM_SYNTAX(s_letstar,"let*", scm_makmmacro, scm_m_letstar); |
2f0d1375 | 742 | SCM_GLOBAL_SYMBOL(scm_sym_letstar,s_letstar); |
0f2d19dd | 743 | |
1cc91f1b | 744 | |
0f2d19dd JB |
745 | SCM |
746 | scm_m_letstar (xorig, env) | |
747 | SCM xorig; | |
748 | SCM env; | |
0f2d19dd JB |
749 | { |
750 | SCM x = SCM_CDR (xorig), arg1, proc, vars = SCM_EOL, *varloc = &vars; | |
751 | int len = scm_ilength (x); | |
b8229a3b | 752 | SCM_ASSYNT (len >= 2, xorig, scm_s_body, s_letstar); |
0f2d19dd | 753 | proc = SCM_CAR (x); |
b8229a3b | 754 | SCM_ASSYNT (scm_ilength (proc) >= 0, xorig, scm_s_bindings, s_letstar); |
ff467021 | 755 | while (SCM_NIMP (proc)) |
0f2d19dd JB |
756 | { |
757 | arg1 = SCM_CAR (proc); | |
b8229a3b | 758 | SCM_ASSYNT (2 == scm_ilength (arg1), xorig, scm_s_bindings, s_letstar); |
6cb702da | 759 | SCM_ASSYNT (SCM_NIMP (SCM_CAR (arg1)) && SCM_SYMBOLP (SCM_CAR (arg1)), |
b8229a3b | 760 | xorig, scm_s_variable, s_letstar); |
0f2d19dd | 761 | *varloc = scm_cons2 (SCM_CAR (arg1), SCM_CAR (SCM_CDR (arg1)), SCM_EOL); |
a23afe53 | 762 | varloc = SCM_CDRLOC (SCM_CDR (*varloc)); |
0f2d19dd JB |
763 | proc = SCM_CDR (proc); |
764 | } | |
765 | x = scm_cons (vars, SCM_CDR (x)); | |
26d5b9b4 | 766 | |
3a3111a8 MD |
767 | return scm_cons2 (SCM_IM_LETSTAR, SCM_CAR (x), |
768 | scm_m_body (SCM_IM_LETSTAR, SCM_CDR (x), s_letstar)); | |
0f2d19dd JB |
769 | } |
770 | ||
771 | /* DO gets the most radically altered syntax | |
772 | (do ((<var1> <init1> <step1>) | |
773 | (<var2> <init2>) | |
774 | ... ) | |
775 | (<test> <return>) | |
776 | <body>) | |
777 | ;; becomes | |
778 | (do_mem (varn ... var2 var1) | |
779 | (<init1> <init2> ... <initn>) | |
780 | (<test> <return>) | |
781 | (<body>) | |
782 | <step1> <step2> ... <stepn>) ;; missing steps replaced by var | |
783 | */ | |
784 | ||
b8229a3b | 785 | SCM_SYNTAX(s_do, "do", scm_makmmacro, scm_m_do); |
2f0d1375 | 786 | SCM_GLOBAL_SYMBOL(scm_sym_do, s_do); |
1cc91f1b | 787 | |
0f2d19dd JB |
788 | SCM |
789 | scm_m_do (xorig, env) | |
790 | SCM xorig; | |
791 | SCM env; | |
0f2d19dd JB |
792 | { |
793 | SCM x = SCM_CDR (xorig), arg1, proc; | |
794 | SCM vars = SCM_EOL, inits = SCM_EOL, steps = SCM_EOL; | |
795 | SCM *initloc = &inits, *steploc = &steps; | |
796 | int len = scm_ilength (x); | |
6cb702da | 797 | SCM_ASSYNT (len >= 2, xorig, scm_s_test, "do"); |
0f2d19dd | 798 | proc = SCM_CAR (x); |
6cb702da | 799 | SCM_ASSYNT (scm_ilength (proc) >= 0, xorig, scm_s_bindings, "do"); |
ff467021 | 800 | while (SCM_NIMP(proc)) |
0f2d19dd JB |
801 | { |
802 | arg1 = SCM_CAR (proc); | |
803 | len = scm_ilength (arg1); | |
6cb702da MD |
804 | SCM_ASSYNT (2 == len || 3 == len, xorig, scm_s_bindings, "do"); |
805 | SCM_ASSYNT (SCM_NIMP (SCM_CAR (arg1)) && SCM_SYMBOLP (SCM_CAR (arg1)), | |
806 | xorig, scm_s_variable, "do"); | |
0f2d19dd JB |
807 | /* vars reversed here, inits and steps reversed at evaluation */ |
808 | vars = scm_cons (SCM_CAR (arg1), vars); /* variable */ | |
809 | arg1 = SCM_CDR (arg1); | |
810 | *initloc = scm_cons (SCM_CAR (arg1), SCM_EOL); /* init */ | |
a23afe53 | 811 | initloc = SCM_CDRLOC (*initloc); |
0f2d19dd JB |
812 | arg1 = SCM_CDR (arg1); |
813 | *steploc = scm_cons (SCM_IMP (arg1) ? SCM_CAR (vars) : SCM_CAR (arg1), SCM_EOL); /* step */ | |
a23afe53 | 814 | steploc = SCM_CDRLOC (*steploc); |
0f2d19dd JB |
815 | proc = SCM_CDR (proc); |
816 | } | |
817 | x = SCM_CDR (x); | |
6cb702da | 818 | SCM_ASSYNT (scm_ilength (SCM_CAR (x)) >= 1, xorig, scm_s_test, "do"); |
0f2d19dd JB |
819 | x = scm_cons2 (SCM_CAR (x), SCM_CDR (x), steps); |
820 | x = scm_cons2 (vars, inits, x); | |
a23afe53 | 821 | bodycheck (xorig, SCM_CARLOC (SCM_CDR (SCM_CDR (x))), "do"); |
3a3111a8 | 822 | return scm_cons (SCM_IM_DO, x); |
0f2d19dd JB |
823 | } |
824 | ||
6dbd0af5 MD |
825 | /* evalcar is small version of inline EVALCAR when we don't care about |
826 | * speed | |
827 | */ | |
828 | #define evalcar scm_eval_car | |
0f2d19dd | 829 | |
1cc91f1b JB |
830 | |
831 | static SCM iqq SCM_P ((SCM form, SCM env, int depth)); | |
832 | ||
b8229a3b | 833 | SCM_SYNTAX(s_quasiquote, "quasiquote", scm_makacro, scm_m_quasiquote); |
2f0d1375 | 834 | SCM_GLOBAL_SYMBOL(scm_sym_quasiquote, s_quasiquote); |
b8229a3b MS |
835 | |
836 | SCM | |
837 | scm_m_quasiquote (xorig, env) | |
838 | SCM xorig; | |
839 | SCM env; | |
840 | { | |
841 | SCM x = SCM_CDR (xorig); | |
842 | SCM_ASSYNT (scm_ilength (x) == 1, xorig, scm_s_expression, s_quasiquote); | |
843 | return iqq (SCM_CAR (x), env, 1); | |
844 | } | |
845 | ||
846 | ||
0f2d19dd JB |
847 | static SCM |
848 | iqq (form, env, depth) | |
849 | SCM form; | |
850 | SCM env; | |
851 | int depth; | |
0f2d19dd JB |
852 | { |
853 | SCM tmp; | |
854 | int edepth = depth; | |
ff467021 JB |
855 | if (SCM_IMP(form)) |
856 | return form; | |
0f2d19dd JB |
857 | if (SCM_VECTORP (form)) |
858 | { | |
859 | long i = SCM_LENGTH (form); | |
860 | SCM *data = SCM_VELTS (form); | |
861 | tmp = SCM_EOL; | |
862 | for (; --i >= 0;) | |
863 | tmp = scm_cons (data[i], tmp); | |
864 | return scm_vector (iqq (tmp, env, depth)); | |
865 | } | |
ff467021 JB |
866 | if (SCM_NCONSP(form)) |
867 | return form; | |
0f2d19dd | 868 | tmp = SCM_CAR (form); |
2f0d1375 | 869 | if (scm_sym_quasiquote == tmp) |
0f2d19dd JB |
870 | { |
871 | depth++; | |
872 | goto label; | |
873 | } | |
2f0d1375 | 874 | if (scm_sym_unquote == tmp) |
0f2d19dd JB |
875 | { |
876 | --depth; | |
877 | label: | |
878 | form = SCM_CDR (form); | |
0f2d19dd JB |
879 | SCM_ASSERT (SCM_NIMP (form) && SCM_ECONSP (form) && SCM_NULLP (SCM_CDR (form)), |
880 | form, SCM_ARG1, s_quasiquote); | |
881 | if (0 == depth) | |
882 | return evalcar (form, env); | |
883 | return scm_cons2 (tmp, iqq (SCM_CAR (form), env, depth), SCM_EOL); | |
884 | } | |
2f0d1375 | 885 | if (SCM_NIMP (tmp) && (scm_sym_uq_splicing == SCM_CAR (tmp))) |
0f2d19dd JB |
886 | { |
887 | tmp = SCM_CDR (tmp); | |
888 | if (0 == --edepth) | |
889 | return scm_append (scm_cons2 (evalcar (tmp, env), iqq (SCM_CDR (form), env, depth), SCM_EOL)); | |
890 | } | |
891 | return scm_cons (iqq (SCM_CAR (form), env, edepth), iqq (SCM_CDR (form), env, depth)); | |
892 | } | |
893 | ||
894 | /* Here are acros which return values rather than code. */ | |
895 | ||
b8229a3b | 896 | SCM_SYNTAX(s_delay, "delay", scm_makacro, scm_m_delay); |
1cc91f1b | 897 | |
0f2d19dd JB |
898 | SCM |
899 | scm_m_delay (xorig, env) | |
900 | SCM xorig; | |
901 | SCM env; | |
0f2d19dd | 902 | { |
6cb702da | 903 | SCM_ASSYNT (scm_ilength (xorig) == 2, xorig, scm_s_expression, s_delay); |
0f2d19dd | 904 | xorig = SCM_CDR (xorig); |
26d5b9b4 MD |
905 | return scm_makprom (scm_closure (scm_cons2 (SCM_EOL, SCM_CAR (xorig), |
906 | SCM_CDR (xorig)), | |
0f2d19dd JB |
907 | env)); |
908 | } | |
909 | ||
1cc91f1b | 910 | |
b8229a3b | 911 | SCM_SYNTAX(s_define, "define", scm_makmmacro, scm_m_define); |
2f0d1375 | 912 | SCM_GLOBAL_SYMBOL(scm_sym_define, s_define); |
1cc91f1b | 913 | |
0f2d19dd JB |
914 | SCM |
915 | scm_m_define (x, env) | |
916 | SCM x; | |
917 | SCM env; | |
0f2d19dd JB |
918 | { |
919 | SCM proc, arg1 = x; | |
920 | x = SCM_CDR (x); | |
6cb702da | 921 | /* SCM_ASSYNT(SCM_NULLP(env), x, "bad placement", s_define);*/ |
b8229a3b | 922 | SCM_ASSYNT (scm_ilength (x) >= 2, arg1, scm_s_expression, s_define); |
0f2d19dd JB |
923 | proc = SCM_CAR (x); |
924 | x = SCM_CDR (x); | |
925 | while (SCM_NIMP (proc) && SCM_CONSP (proc)) | |
926 | { /* nested define syntax */ | |
2f0d1375 | 927 | x = scm_cons (scm_cons2 (scm_sym_lambda, SCM_CDR (proc), x), SCM_EOL); |
0f2d19dd JB |
928 | proc = SCM_CAR (proc); |
929 | } | |
6cb702da | 930 | SCM_ASSYNT (SCM_NIMP (proc) && SCM_SYMBOLP (proc), |
b8229a3b MS |
931 | arg1, scm_s_variable, s_define); |
932 | SCM_ASSYNT (1 == scm_ilength (x), arg1, scm_s_expression, s_define); | |
0f2d19dd JB |
933 | if (SCM_TOP_LEVEL (env)) |
934 | { | |
935 | x = evalcar (x, env); | |
6dbd0af5 | 936 | #ifdef DEBUG_EXTENSIONS |
80ea260c MD |
937 | if (SCM_REC_PROCNAMES_P && SCM_NIMP (x)) |
938 | { | |
939 | arg1 = x; | |
940 | proc: | |
941 | if (SCM_CLOSUREP (arg1) | |
942 | /* Only the first definition determines the name. */ | |
2f0d1375 MD |
943 | && scm_procedure_property (arg1, scm_sym_name) == SCM_BOOL_F) |
944 | scm_set_procedure_property_x (arg1, scm_sym_name, proc); | |
80ea260c MD |
945 | else if (SCM_TYP16 (arg1) == scm_tc16_macro |
946 | && SCM_CDR (arg1) != arg1) | |
947 | { | |
948 | arg1 = SCM_CDR (arg1); | |
949 | goto proc; | |
950 | } | |
951 | } | |
6dbd0af5 | 952 | #endif |
6cb702da | 953 | arg1 = scm_sym2vcell (proc, scm_env_top_level (env), SCM_BOOL_T); |
0f2d19dd | 954 | #if 0 |
cf7c17e9 | 955 | #ifndef SCM_RECKLESS |
0f2d19dd JB |
956 | if (SCM_NIMP (SCM_CDR (arg1)) && ((SCM) SCM_SNAME (SCM_CDR (arg1)) == proc) |
957 | && (SCM_CDR (arg1) != x)) | |
958 | scm_warn ("redefining built-in ", SCM_CHARS (proc)); | |
959 | else | |
960 | #endif | |
961 | if (5 <= scm_verbose && SCM_UNDEFINED != SCM_CDR (arg1)) | |
962 | scm_warn ("redefining ", SCM_CHARS (proc)); | |
0f2d19dd | 963 | #endif |
a23afe53 | 964 | SCM_SETCDR (arg1, x); |
0f2d19dd | 965 | #ifdef SICP |
2f0d1375 | 966 | return scm_cons2 (scm_sym_quote, SCM_CAR (arg1), SCM_EOL); |
0f2d19dd JB |
967 | #else |
968 | return SCM_UNSPECIFIED; | |
969 | #endif | |
970 | } | |
971 | return scm_cons2 (SCM_IM_DEFINE, proc, x); | |
972 | } | |
6dbd0af5 | 973 | |
0f2d19dd JB |
974 | /* end of acros */ |
975 | ||
26d5b9b4 MD |
976 | static SCM |
977 | scm_m_letrec1 (op, imm, xorig, env) | |
978 | SCM op; | |
979 | SCM imm; | |
0f2d19dd JB |
980 | SCM xorig; |
981 | SCM env; | |
0f2d19dd JB |
982 | { |
983 | SCM cdrx = SCM_CDR (xorig); /* locally mutable version of form */ | |
984 | char *what = SCM_CHARS (SCM_CAR (xorig)); | |
985 | SCM x = cdrx, proc, arg1; /* structure traversers */ | |
986 | SCM vars = SCM_EOL, inits = SCM_EOL, *initloc = &inits; | |
987 | ||
0f2d19dd | 988 | proc = SCM_CAR (x); |
6cb702da | 989 | ASRTSYNTAX (scm_ilength (proc) >= 1, scm_s_bindings); |
0f2d19dd JB |
990 | do |
991 | { | |
992 | /* vars scm_list reversed here, inits reversed at evaluation */ | |
993 | arg1 = SCM_CAR (proc); | |
6cb702da | 994 | ASRTSYNTAX (2 == scm_ilength (arg1), scm_s_bindings); |
26d5b9b4 MD |
995 | ASRTSYNTAX (SCM_NIMP (SCM_CAR (arg1)) && SCM_SYMBOLP (SCM_CAR (arg1)), |
996 | scm_s_variable); | |
0f2d19dd JB |
997 | vars = scm_cons (SCM_CAR (arg1), vars); |
998 | *initloc = scm_cons (SCM_CAR (SCM_CDR (arg1)), SCM_EOL); | |
a23afe53 | 999 | initloc = SCM_CDRLOC (*initloc); |
0f2d19dd | 1000 | } |
ff467021 | 1001 | while (SCM_NIMP (proc = SCM_CDR (proc))); |
26d5b9b4 | 1002 | |
3a3111a8 MD |
1003 | return scm_cons2 (op, vars, |
1004 | scm_cons (inits, scm_m_body (imm, SCM_CDR (x), what))); | |
0f2d19dd JB |
1005 | } |
1006 | ||
26d5b9b4 | 1007 | SCM_SYNTAX(s_letrec, "letrec", scm_makmmacro, scm_m_letrec); |
2f0d1375 | 1008 | SCM_GLOBAL_SYMBOL(scm_sym_letrec, s_letrec); |
26d5b9b4 MD |
1009 | |
1010 | SCM | |
1011 | scm_m_letrec (xorig, env) | |
1012 | SCM xorig; | |
1013 | SCM env; | |
1014 | { | |
1015 | SCM x = SCM_CDR (xorig); | |
1016 | SCM_ASSYNT (scm_ilength (x) >= 2, xorig, scm_s_body, s_letrec); | |
1017 | ||
1018 | if (SCM_NULLP (SCM_CAR (x))) /* null binding, let* faster */ | |
3a3111a8 MD |
1019 | return scm_m_letstar (scm_cons2 (SCM_CAR (xorig), SCM_EOL, |
1020 | scm_m_body (SCM_IM_LETREC, | |
1021 | SCM_CDR (x), | |
1022 | s_letrec)), | |
26d5b9b4 MD |
1023 | env); |
1024 | else | |
1025 | return scm_m_letrec1 (SCM_IM_LETREC, SCM_IM_LETREC, xorig, env); | |
1026 | } | |
1cc91f1b | 1027 | |
b8229a3b | 1028 | SCM_SYNTAX(s_let, "let", scm_makmmacro, scm_m_let); |
2f0d1375 | 1029 | SCM_GLOBAL_SYMBOL(scm_sym_let, s_let); |
b8229a3b | 1030 | |
0f2d19dd JB |
1031 | SCM |
1032 | scm_m_let (xorig, env) | |
1033 | SCM xorig; | |
1034 | SCM env; | |
0f2d19dd JB |
1035 | { |
1036 | SCM cdrx = SCM_CDR (xorig); /* locally mutable version of form */ | |
1037 | SCM x = cdrx, proc, arg1, name; /* structure traversers */ | |
1038 | SCM vars = SCM_EOL, inits = SCM_EOL, *varloc = &vars, *initloc = &inits; | |
1039 | ||
b8229a3b | 1040 | SCM_ASSYNT (scm_ilength (x) >= 2, xorig, scm_s_body, s_let); |
0f2d19dd JB |
1041 | proc = SCM_CAR (x); |
1042 | if (SCM_NULLP (proc) | |
1043 | || (SCM_NIMP (proc) && SCM_CONSP (proc) | |
26d5b9b4 MD |
1044 | && SCM_NIMP (SCM_CAR (proc)) |
1045 | && SCM_CONSP (SCM_CAR (proc)) && SCM_NULLP (SCM_CDR (proc)))) | |
1046 | { | |
1047 | /* null or single binding, let* is faster */ | |
3a3111a8 MD |
1048 | return scm_m_letstar (scm_cons2 (SCM_CAR (xorig), proc, |
1049 | scm_m_body (SCM_IM_LET, | |
1050 | SCM_CDR (x), | |
1051 | s_let)), | |
26d5b9b4 MD |
1052 | env); |
1053 | } | |
1054 | ||
b8229a3b | 1055 | SCM_ASSYNT (SCM_NIMP (proc), xorig, scm_s_bindings, s_let); |
26d5b9b4 MD |
1056 | if (SCM_CONSP (proc)) |
1057 | { | |
1058 | /* plain let, proc is <bindings> */ | |
1059 | return scm_m_letrec1 (SCM_IM_LET, SCM_IM_LET, xorig, env); | |
1060 | } | |
1061 | ||
0f2d19dd | 1062 | if (!SCM_SYMBOLP (proc)) |
b8229a3b | 1063 | scm_wta (xorig, scm_s_bindings, s_let); /* bad let */ |
0f2d19dd JB |
1064 | name = proc; /* named let, build equiv letrec */ |
1065 | x = SCM_CDR (x); | |
b8229a3b | 1066 | SCM_ASSYNT (scm_ilength (x) >= 2, xorig, scm_s_body, s_let); |
26d5b9b4 | 1067 | proc = SCM_CAR (x); /* bindings list */ |
b8229a3b | 1068 | SCM_ASSYNT (scm_ilength (proc) >= 0, xorig, scm_s_bindings, s_let); |
ff467021 | 1069 | while (SCM_NIMP (proc)) |
0f2d19dd JB |
1070 | { /* vars and inits both in order */ |
1071 | arg1 = SCM_CAR (proc); | |
b8229a3b | 1072 | SCM_ASSYNT (2 == scm_ilength (arg1), xorig, scm_s_bindings, s_let); |
6cb702da | 1073 | SCM_ASSYNT (SCM_NIMP (SCM_CAR (arg1)) && SCM_SYMBOLP (SCM_CAR (arg1)), |
b8229a3b | 1074 | xorig, scm_s_variable, s_let); |
0f2d19dd | 1075 | *varloc = scm_cons (SCM_CAR (arg1), SCM_EOL); |
a23afe53 | 1076 | varloc = SCM_CDRLOC (*varloc); |
0f2d19dd | 1077 | *initloc = scm_cons (SCM_CAR (SCM_CDR (arg1)), SCM_EOL); |
a23afe53 | 1078 | initloc = SCM_CDRLOC (*initloc); |
0f2d19dd JB |
1079 | proc = SCM_CDR (proc); |
1080 | } | |
26d5b9b4 | 1081 | |
2f0d1375 | 1082 | proc = scm_cons2 (scm_sym_lambda, vars, |
26d5b9b4 | 1083 | scm_m_body (SCM_IM_LET, SCM_CDR (x), "let")); |
2f0d1375 | 1084 | proc = scm_cons2 (scm_sym_let, scm_cons (scm_cons2 (name, proc, SCM_EOL), |
26d5b9b4 MD |
1085 | SCM_EOL), |
1086 | scm_acons (name, inits, SCM_EOL)); | |
1087 | return scm_m_letrec1 (SCM_IM_LETREC, SCM_IM_LET, proc, env); | |
0f2d19dd JB |
1088 | } |
1089 | ||
1090 | ||
b8229a3b | 1091 | SCM_SYNTAX(s_atapply,"@apply", scm_makmmacro, scm_m_apply); |
2f0d1375 | 1092 | SCM_GLOBAL_SYMBOL(scm_sym_atapply, s_atapply); |
1cc91f1b | 1093 | |
0f2d19dd JB |
1094 | SCM |
1095 | scm_m_apply (xorig, env) | |
1096 | SCM xorig; | |
1097 | SCM env; | |
0f2d19dd | 1098 | { |
6cb702da | 1099 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 2, |
b8229a3b | 1100 | xorig, scm_s_expression, s_atapply); |
0f2d19dd JB |
1101 | return scm_cons (SCM_IM_APPLY, SCM_CDR (xorig)); |
1102 | } | |
1103 | ||
b8229a3b MS |
1104 | |
1105 | SCM_SYNTAX(s_atcall_cc,"@call-with-current-continuation", scm_makmmacro, scm_m_cont); | |
2f0d1375 | 1106 | SCM_GLOBAL_SYMBOL(scm_sym_atcall_cc,s_atcall_cc); |
0f2d19dd | 1107 | |
1cc91f1b | 1108 | |
0f2d19dd JB |
1109 | SCM |
1110 | scm_m_cont (xorig, env) | |
1111 | SCM xorig; | |
1112 | SCM env; | |
0f2d19dd | 1113 | { |
6cb702da | 1114 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, |
b8229a3b | 1115 | xorig, scm_s_expression, s_atcall_cc); |
3a3111a8 | 1116 | return scm_cons (SCM_IM_CONT, SCM_CDR (xorig)); |
0f2d19dd JB |
1117 | } |
1118 | ||
73b64342 MD |
1119 | /* Multi-language support */ |
1120 | ||
1121 | SCM scm_nil; | |
1122 | SCM scm_t; | |
1123 | ||
1124 | SCM_SYNTAX (s_nil_cond, "nil-cond", scm_makmmacro, scm_m_nil_cond); | |
1125 | ||
1126 | SCM | |
1127 | scm_m_nil_cond (SCM xorig, SCM env) | |
1128 | { | |
1129 | int len = scm_ilength (SCM_CDR (xorig)); | |
1130 | SCM_ASSYNT (len >= 1 && (len & 1) == 1, xorig, | |
1131 | scm_s_expression, "nil-cond"); | |
1132 | return scm_cons (SCM_IM_NIL_COND, SCM_CDR (xorig)); | |
1133 | } | |
1134 | ||
1135 | SCM_SYNTAX (s_nil_ify, "nil-ify", scm_makmmacro, scm_m_nil_ify); | |
1136 | ||
1137 | SCM | |
1138 | scm_m_nil_ify (SCM xorig, SCM env) | |
1139 | { | |
1140 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, | |
1141 | xorig, scm_s_expression, "nil-ify"); | |
1142 | return scm_cons (SCM_IM_NIL_IFY, SCM_CDR (xorig)); | |
1143 | } | |
1144 | ||
1145 | SCM_SYNTAX (s_t_ify, "t-ify", scm_makmmacro, scm_m_t_ify); | |
1146 | ||
1147 | SCM | |
1148 | scm_m_t_ify (SCM xorig, SCM env) | |
1149 | { | |
1150 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, | |
1151 | xorig, scm_s_expression, "t-ify"); | |
1152 | return scm_cons (SCM_IM_T_IFY, SCM_CDR (xorig)); | |
1153 | } | |
1154 | ||
1155 | SCM_SYNTAX (s_0_cond, "0-cond", scm_makmmacro, scm_m_0_cond); | |
1156 | ||
1157 | SCM | |
1158 | scm_m_0_cond (SCM xorig, SCM env) | |
1159 | { | |
1160 | int len = scm_ilength (SCM_CDR (xorig)); | |
1161 | SCM_ASSYNT (len >= 1 && (len & 1) == 1, xorig, | |
1162 | scm_s_expression, "0-cond"); | |
1163 | return scm_cons (SCM_IM_0_COND, SCM_CDR (xorig)); | |
1164 | } | |
1165 | ||
1166 | SCM_SYNTAX (s_0_ify, "0-ify", scm_makmmacro, scm_m_0_ify); | |
1167 | ||
1168 | SCM | |
1169 | scm_m_0_ify (SCM xorig, SCM env) | |
1170 | { | |
1171 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, | |
1172 | xorig, scm_s_expression, "0-ify"); | |
1173 | return scm_cons (SCM_IM_0_IFY, SCM_CDR (xorig)); | |
1174 | } | |
1175 | ||
1176 | SCM_SYNTAX (s_1_ify, "1-ify", scm_makmmacro, scm_m_1_ify); | |
1177 | ||
1178 | SCM | |
1179 | scm_m_1_ify (SCM xorig, SCM env) | |
1180 | { | |
1181 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, | |
1182 | xorig, scm_s_expression, "1-ify"); | |
1183 | return scm_cons (SCM_IM_1_IFY, SCM_CDR (xorig)); | |
1184 | } | |
1185 | ||
1186 | SCM_SYNTAX (s_atfop, "@fop", scm_makmmacro, scm_m_atfop); | |
1187 | ||
1188 | SCM | |
1189 | scm_m_atfop (SCM xorig, SCM env) | |
1190 | { | |
1191 | SCM x = SCM_CDR (xorig), vcell; | |
1192 | SCM_ASSYNT (scm_ilength (x) >= 1, xorig, scm_s_expression, "@fop"); | |
1193 | vcell = scm_symbol_fref (SCM_CAR (x)); | |
1194 | SCM_ASSYNT (SCM_NIMP (vcell) && SCM_CONSP (vcell), x, | |
1195 | "Symbol's function definition is void", NULL); | |
1196 | SCM_SETCAR (x, vcell + 1); | |
1197 | return x; | |
1198 | } | |
1199 | ||
1200 | SCM_SYNTAX (s_atbind, "@bind", scm_makmmacro, scm_m_atbind); | |
1201 | ||
1202 | SCM | |
1203 | scm_m_atbind (SCM xorig, SCM env) | |
1204 | { | |
1205 | SCM x = SCM_CDR (xorig); | |
1206 | SCM_ASSYNT (scm_ilength (x) > 1, xorig, scm_s_expression, "@bind"); | |
1207 | ||
1208 | if (SCM_IMP (env)) | |
1209 | env = SCM_BOOL_F; | |
1210 | else | |
1211 | { | |
1212 | while (SCM_NIMP (SCM_CDR (env))) | |
1213 | env = SCM_CDR (env); | |
1214 | env = SCM_CAR (env); | |
1215 | if (SCM_CONSP (env)) | |
1216 | env = SCM_BOOL_F; | |
1217 | } | |
1218 | ||
1219 | x = SCM_CAR (x); | |
1220 | while (SCM_NIMP (x)) | |
1221 | { | |
1222 | SCM_SETCAR (x, scm_sym2vcell (SCM_CAR (x), env, SCM_BOOL_T) + 1); | |
1223 | x = SCM_CDR (x); | |
1224 | } | |
1225 | return scm_cons (SCM_IM_BIND, SCM_CDR (xorig)); | |
1226 | } | |
73b64342 | 1227 | |
26d5b9b4 MD |
1228 | SCM |
1229 | scm_m_expand_body (SCM xorig, SCM env) | |
1230 | { | |
1231 | SCM form, x = SCM_CDR (xorig), defs = SCM_EOL; | |
1232 | char *what = SCM_ISYMCHARS (SCM_CAR (xorig)) + 2; | |
1233 | ||
1234 | while (SCM_NIMP (x)) | |
1235 | { | |
1236 | form = SCM_CAR (x); | |
1237 | if (SCM_IMP (form) || SCM_NCONSP (form)) | |
1238 | break; | |
1239 | if (SCM_IMP (SCM_CAR (form))) | |
1240 | break; | |
1241 | if (!SCM_SYMBOLP (SCM_CAR (form))) | |
1242 | break; | |
1243 | ||
3a3111a8 MD |
1244 | form = scm_macroexp (scm_cons_source (form, |
1245 | SCM_CAR (form), | |
1246 | SCM_CDR (form)), | |
1247 | env); | |
26d5b9b4 MD |
1248 | |
1249 | if (SCM_IM_DEFINE == SCM_CAR (form)) | |
1250 | { | |
1251 | defs = scm_cons (SCM_CDR (form), defs); | |
1252 | x = SCM_CDR(x); | |
1253 | } | |
1254 | else if (SCM_NIMP(defs)) | |
1255 | { | |
1256 | break; | |
1257 | } | |
1258 | else if (SCM_IM_BEGIN == SCM_CAR (form)) | |
1259 | { | |
1260 | x = scm_append (scm_cons2 (SCM_CDR (form), SCM_CDR (x), SCM_EOL)); | |
1261 | } | |
1262 | else | |
1263 | { | |
1264 | x = scm_cons (form, SCM_CDR(x)); | |
1265 | break; | |
1266 | } | |
1267 | } | |
1268 | ||
1269 | SCM_ASSYNT (SCM_NIMP (x), SCM_CDR (xorig), scm_s_body, what); | |
1270 | if (SCM_NIMP (defs)) | |
1271 | { | |
1272 | x = scm_cons (scm_m_letrec1 (SCM_IM_LETREC, | |
1273 | SCM_IM_DEFINE, | |
2f0d1375 | 1274 | scm_cons2 (scm_sym_define, defs, x), |
26d5b9b4 MD |
1275 | env), |
1276 | SCM_EOL); | |
1277 | } | |
1278 | ||
1279 | SCM_DEFER_INTS; | |
1280 | SCM_SETCAR (xorig, SCM_CAR (x)); | |
1281 | SCM_SETCDR (xorig, SCM_CDR (x)); | |
1282 | SCM_ALLOW_INTS; | |
1283 | ||
1284 | return xorig; | |
1285 | } | |
1286 | ||
1287 | SCM | |
1288 | scm_macroexp (SCM x, SCM env) | |
1289 | { | |
1290 | SCM res, proc; | |
1291 | ||
1292 | /* Don't bother to produce error messages here. We get them when we | |
1293 | eventually execute the code for real. */ | |
1294 | ||
1295 | macro_tail: | |
1296 | if (SCM_IMP (SCM_CAR (x)) || !SCM_SYMBOLP (SCM_CAR (x))) | |
1297 | return x; | |
1298 | ||
1299 | #ifdef USE_THREADS | |
1300 | { | |
1301 | SCM *proc_ptr = scm_lookupcar1 (x, env, 0); | |
1302 | if (proc_ptr == NULL) | |
1303 | { | |
1304 | /* We have lost the race. */ | |
1305 | goto macro_tail; | |
1306 | } | |
1307 | proc = *proc_ptr; | |
1308 | } | |
1309 | #else | |
1310 | proc = *scm_lookupcar (x, env, 0); | |
1311 | #endif | |
1312 | ||
1313 | /* Only handle memoizing macros. `Acros' and `macros' are really | |
1314 | special forms and should not be evaluated here. */ | |
1315 | ||
1316 | if (SCM_IMP (proc) | |
1317 | || scm_tc16_macro != SCM_TYP16 (proc) | |
1318 | || (int) (SCM_CAR (proc) >> 16) != 2) | |
1319 | return x; | |
1320 | ||
1321 | unmemocar (x, env); | |
1322 | res = scm_apply (SCM_CDR (proc), x, scm_cons (env, scm_listofnull)); | |
1323 | ||
1324 | if (scm_ilength (res) <= 0) | |
1325 | res = scm_cons2 (SCM_IM_BEGIN, res, SCM_EOL); | |
1326 | ||
26d5b9b4 MD |
1327 | SCM_DEFER_INTS; |
1328 | SCM_SETCAR (x, SCM_CAR (res)); | |
1329 | SCM_SETCDR (x, SCM_CDR (res)); | |
1330 | SCM_ALLOW_INTS; | |
1331 | ||
1332 | goto macro_tail; | |
1333 | } | |
73b64342 | 1334 | |
6dbd0af5 MD |
1335 | /* scm_unmemocopy takes a memoized expression together with its |
1336 | * environment and rewrites it to its original form. Thus, it is the | |
1337 | * inversion of the rewrite rules above. The procedure is not | |
1338 | * optimized for speed. It's used in scm_iprin1 when printing the | |
220ff1eb MD |
1339 | * code of a closure, in scm_procedure_source, in display_frame when |
1340 | * generating the source for a stackframe in a backtrace, and in | |
1341 | * display_expression. | |
6dbd0af5 MD |
1342 | */ |
1343 | ||
26d5b9b4 MD |
1344 | /* We should introduce an anti-macro interface so that it is possible |
1345 | * to plug in transformers in both directions from other compilation | |
1346 | * units. unmemocopy could then dispatch to anti-macro transformers. | |
1347 | * (Those transformers could perhaps be written in slightly more | |
1348 | * readable style... :) | |
1349 | */ | |
1350 | ||
1cc91f1b JB |
1351 | static SCM unmemocopy SCM_P ((SCM x, SCM env)); |
1352 | ||
6dbd0af5 MD |
1353 | static SCM |
1354 | unmemocopy (x, env) | |
1355 | SCM x; | |
1356 | SCM env; | |
6dbd0af5 MD |
1357 | { |
1358 | SCM ls, z; | |
1359 | #ifdef DEBUG_EXTENSIONS | |
1360 | SCM p; | |
1361 | #endif | |
1362 | if (SCM_NCELLP (x) || SCM_NECONSP (x)) | |
1363 | return x; | |
1364 | #ifdef DEBUG_EXTENSIONS | |
1365 | p = scm_whash_lookup (scm_source_whash, x); | |
1366 | #endif | |
1367 | switch (SCM_TYP7 (x)) | |
1368 | { | |
1369 | case (127 & SCM_IM_AND): | |
2f0d1375 | 1370 | ls = z = scm_cons (scm_sym_and, SCM_UNSPECIFIED); |
6dbd0af5 MD |
1371 | break; |
1372 | case (127 & SCM_IM_BEGIN): | |
2f0d1375 | 1373 | ls = z = scm_cons (scm_sym_begin, SCM_UNSPECIFIED); |
6dbd0af5 MD |
1374 | break; |
1375 | case (127 & SCM_IM_CASE): | |
2f0d1375 | 1376 | ls = z = scm_cons (scm_sym_case, SCM_UNSPECIFIED); |
6dbd0af5 MD |
1377 | break; |
1378 | case (127 & SCM_IM_COND): | |
2f0d1375 | 1379 | ls = z = scm_cons (scm_sym_cond, SCM_UNSPECIFIED); |
6dbd0af5 MD |
1380 | break; |
1381 | case (127 & SCM_IM_DO): | |
2f0d1375 | 1382 | ls = scm_cons (scm_sym_do, SCM_UNSPECIFIED); |
6dbd0af5 MD |
1383 | goto transform; |
1384 | case (127 & SCM_IM_IF): | |
2f0d1375 | 1385 | ls = z = scm_cons (scm_sym_if, SCM_UNSPECIFIED); |
6dbd0af5 MD |
1386 | break; |
1387 | case (127 & SCM_IM_LET): | |
2f0d1375 | 1388 | ls = scm_cons (scm_sym_let, SCM_UNSPECIFIED); |
6dbd0af5 MD |
1389 | goto transform; |
1390 | case (127 & SCM_IM_LETREC): | |
1391 | { | |
1392 | SCM f, v, e, s; | |
2f0d1375 | 1393 | ls = scm_cons (scm_sym_letrec, SCM_UNSPECIFIED); |
6dbd0af5 MD |
1394 | transform: |
1395 | x = SCM_CDR (x); | |
26d5b9b4 | 1396 | /* binding names */ |
6dbd0af5 MD |
1397 | f = v = SCM_CAR (x); |
1398 | x = SCM_CDR (x); | |
e2806c10 | 1399 | z = EXTEND_ENV (f, SCM_EOL, env); |
26d5b9b4 | 1400 | /* inits */ |
6dbd0af5 | 1401 | e = scm_reverse (unmemocopy (SCM_CAR (x), |
2f0d1375 | 1402 | SCM_CAR (ls) == scm_sym_letrec ? z : env)); |
6dbd0af5 | 1403 | env = z; |
26d5b9b4 | 1404 | /* increments */ |
2f0d1375 | 1405 | s = SCM_CAR (ls) == scm_sym_do |
6dbd0af5 MD |
1406 | ? scm_reverse (unmemocopy (SCM_CDR (SCM_CDR (SCM_CDR (x))), env)) |
1407 | : f; | |
26d5b9b4 | 1408 | /* build transformed binding list */ |
6dbd0af5 MD |
1409 | z = SCM_EOL; |
1410 | do | |
1411 | { | |
1412 | z = scm_acons (SCM_CAR (v), | |
1413 | scm_cons (SCM_CAR (e), | |
1414 | SCM_CAR (s) == SCM_CAR (v) | |
1415 | ? SCM_EOL | |
1416 | : scm_cons (SCM_CAR (s), SCM_EOL)), | |
1417 | z); | |
1418 | v = SCM_CDR (v); | |
1419 | e = SCM_CDR (e); | |
1420 | s = SCM_CDR (s); | |
1421 | } | |
ff467021 | 1422 | while (SCM_NIMP (v)); |
a23afe53 MD |
1423 | z = scm_cons (z, SCM_UNSPECIFIED); |
1424 | SCM_SETCDR (ls, z); | |
2f0d1375 | 1425 | if (SCM_CAR (ls) == scm_sym_do) |
6dbd0af5 MD |
1426 | { |
1427 | x = SCM_CDR (x); | |
26d5b9b4 | 1428 | /* test clause */ |
a23afe53 | 1429 | SCM_SETCDR (z, scm_cons (unmemocopy (SCM_CAR (x), env), |
6dbd0af5 | 1430 | SCM_UNSPECIFIED)); |
a23afe53 MD |
1431 | z = SCM_CDR (z); |
1432 | x = (SCM) (SCM_CARLOC (SCM_CDR (x)) - 1); | |
26d5b9b4 MD |
1433 | /* body forms are now to be found in SCM_CDR (x) |
1434 | (this is how *real* code look like! :) */ | |
6dbd0af5 MD |
1435 | } |
1436 | break; | |
1437 | } | |
1438 | case (127 & SCM_IM_LETSTAR): | |
1439 | { | |
1440 | SCM b, y; | |
1441 | x = SCM_CDR (x); | |
1442 | b = SCM_CAR (x); | |
1443 | y = SCM_EOL; | |
1444 | if SCM_IMP (b) | |
1445 | { | |
e2806c10 | 1446 | env = EXTEND_ENV (SCM_EOL, SCM_EOL, env); |
6dbd0af5 MD |
1447 | goto letstar; |
1448 | } | |
1449 | y = z = scm_acons (SCM_CAR (b), | |
1450 | unmemocar ( | |
1451 | scm_cons (unmemocopy (SCM_CAR (SCM_CDR (b)), env), SCM_EOL), env), | |
1452 | SCM_UNSPECIFIED); | |
e2806c10 | 1453 | env = EXTEND_ENV (SCM_CAR (b), SCM_BOOL_F, env); |
6dbd0af5 MD |
1454 | b = SCM_CDR (SCM_CDR (b)); |
1455 | if (SCM_IMP (b)) | |
1456 | { | |
1457 | SCM_SETCDR (y, SCM_EOL); | |
2f0d1375 | 1458 | ls = scm_cons (scm_sym_let, z = scm_cons (y, SCM_UNSPECIFIED)); |
6dbd0af5 MD |
1459 | break; |
1460 | } | |
1461 | do | |
1462 | { | |
a23afe53 MD |
1463 | SCM_SETCDR (z, scm_acons (SCM_CAR (b), |
1464 | unmemocar ( | |
6dbd0af5 | 1465 | scm_cons (unmemocopy (SCM_CAR (SCM_CDR (b)), env), SCM_EOL), env), |
a23afe53 MD |
1466 | SCM_UNSPECIFIED)); |
1467 | z = SCM_CDR (z); | |
e2806c10 | 1468 | env = EXTEND_ENV (SCM_CAR (b), SCM_BOOL_F, env); |
6dbd0af5 MD |
1469 | b = SCM_CDR (SCM_CDR (b)); |
1470 | } | |
ff467021 | 1471 | while (SCM_NIMP (b)); |
a23afe53 | 1472 | SCM_SETCDR (z, SCM_EOL); |
6dbd0af5 | 1473 | letstar: |
2f0d1375 | 1474 | ls = scm_cons (scm_sym_letstar, z = scm_cons (y, SCM_UNSPECIFIED)); |
6dbd0af5 MD |
1475 | break; |
1476 | } | |
1477 | case (127 & SCM_IM_OR): | |
2f0d1375 | 1478 | ls = z = scm_cons (scm_sym_or, SCM_UNSPECIFIED); |
6dbd0af5 MD |
1479 | break; |
1480 | case (127 & SCM_IM_LAMBDA): | |
1481 | x = SCM_CDR (x); | |
2f0d1375 | 1482 | ls = scm_cons (scm_sym_lambda, |
6dbd0af5 | 1483 | z = scm_cons (SCM_CAR (x), SCM_UNSPECIFIED)); |
e2806c10 | 1484 | env = EXTEND_ENV (SCM_CAR (x), SCM_EOL, env); |
6dbd0af5 MD |
1485 | break; |
1486 | case (127 & SCM_IM_QUOTE): | |
2f0d1375 | 1487 | ls = z = scm_cons (scm_sym_quote, SCM_UNSPECIFIED); |
6dbd0af5 | 1488 | break; |
89efbff4 MD |
1489 | case (127 & SCM_IM_SET_X): |
1490 | ls = z = scm_cons (scm_sym_set_x, SCM_UNSPECIFIED); | |
6dbd0af5 MD |
1491 | break; |
1492 | case (127 & SCM_IM_DEFINE): | |
1493 | { | |
1494 | SCM n; | |
1495 | x = SCM_CDR (x); | |
2f0d1375 | 1496 | ls = scm_cons (scm_sym_define, |
6dbd0af5 MD |
1497 | z = scm_cons (n = SCM_CAR (x), SCM_UNSPECIFIED)); |
1498 | if (SCM_NNULLP (env)) | |
a23afe53 | 1499 | SCM_SETCAR (SCM_CAR (env), scm_cons (n, SCM_CAR (SCM_CAR (env)))); |
6dbd0af5 MD |
1500 | break; |
1501 | } | |
1502 | case (127 & SCM_MAKISYM (0)): | |
1503 | z = SCM_CAR (x); | |
1504 | if (!SCM_ISYMP (z)) | |
1505 | goto unmemo; | |
ff467021 | 1506 | switch (SCM_ISYMNUM (z)) |
6dbd0af5 MD |
1507 | { |
1508 | case (SCM_ISYMNUM (SCM_IM_APPLY)): | |
2f0d1375 | 1509 | ls = z = scm_cons (scm_sym_atapply, SCM_UNSPECIFIED); |
6dbd0af5 MD |
1510 | goto loop; |
1511 | case (SCM_ISYMNUM (SCM_IM_CONT)): | |
2f0d1375 | 1512 | ls = z = scm_cons (scm_sym_atcall_cc, SCM_UNSPECIFIED); |
6dbd0af5 MD |
1513 | goto loop; |
1514 | default: | |
fa888178 | 1515 | /* appease the Sun compiler god: */ ; |
6dbd0af5 MD |
1516 | } |
1517 | unmemo: | |
1518 | default: | |
1519 | ls = z = unmemocar (scm_cons (unmemocopy (SCM_CAR (x), env), | |
1520 | SCM_UNSPECIFIED), | |
1521 | env); | |
1522 | } | |
1523 | loop: | |
1524 | while (SCM_CELLP (x = SCM_CDR (x)) && SCM_ECONSP (x)) | |
a23afe53 | 1525 | { |
26d5b9b4 MD |
1526 | if (SCM_IMP (SCM_CAR (x)) && SCM_ISYMP (SCM_CAR (x))) |
1527 | /* skip body markers */ | |
1528 | continue; | |
a23afe53 MD |
1529 | SCM_SETCDR (z, unmemocar (scm_cons (unmemocopy (SCM_CAR (x), env), |
1530 | SCM_UNSPECIFIED), | |
1531 | env)); | |
1532 | z = SCM_CDR (z); | |
1533 | } | |
1534 | SCM_SETCDR (z, x); | |
6dbd0af5 MD |
1535 | #ifdef DEBUG_EXTENSIONS |
1536 | if (SCM_NFALSEP (p)) | |
1537 | scm_whash_insert (scm_source_whash, ls, p); | |
1538 | #endif | |
1539 | return ls; | |
1540 | } | |
1541 | ||
1cc91f1b | 1542 | |
6dbd0af5 MD |
1543 | SCM |
1544 | scm_unmemocopy (x, env) | |
1545 | SCM x; | |
1546 | SCM env; | |
6dbd0af5 MD |
1547 | { |
1548 | if (SCM_NNULLP (env)) | |
1549 | /* Make a copy of the lowest frame to protect it from | |
1550 | modifications by SCM_IM_DEFINE */ | |
1551 | return unmemocopy (x, scm_cons (SCM_CAR (env), SCM_CDR (env))); | |
1552 | else | |
1553 | return unmemocopy (x, env); | |
1554 | } | |
1555 | ||
cf7c17e9 | 1556 | #ifndef SCM_RECKLESS |
1cc91f1b | 1557 | |
0f2d19dd JB |
1558 | int |
1559 | scm_badargsp (formals, args) | |
1560 | SCM formals; | |
1561 | SCM args; | |
0f2d19dd | 1562 | { |
ff467021 | 1563 | while (SCM_NIMP (formals)) |
0f2d19dd | 1564 | { |
ff467021 JB |
1565 | if (SCM_NCONSP (formals)) |
1566 | return 0; | |
1567 | if (SCM_IMP(args)) | |
1568 | return 1; | |
0f2d19dd JB |
1569 | formals = SCM_CDR (formals); |
1570 | args = SCM_CDR (args); | |
1571 | } | |
1572 | return SCM_NNULLP (args) ? 1 : 0; | |
1573 | } | |
1574 | #endif | |
1575 | ||
1576 | ||
1577 | \f | |
6dbd0af5 | 1578 | SCM |
680ed4a8 | 1579 | scm_eval_args (l, env, proc) |
6dbd0af5 MD |
1580 | SCM l; |
1581 | SCM env; | |
680ed4a8 | 1582 | SCM proc; |
6dbd0af5 | 1583 | { |
680ed4a8 | 1584 | SCM results = SCM_EOL, *lloc = &results, res; |
6dbd0af5 MD |
1585 | while (SCM_NIMP (l)) |
1586 | { | |
cf7c17e9 | 1587 | #ifdef SCM_CAUTIOUS |
680ed4a8 MD |
1588 | if (SCM_IMP (l)) |
1589 | goto wrongnumargs; | |
1590 | else if (SCM_CONSP (l)) | |
1591 | { | |
1592 | if (SCM_IMP (SCM_CAR (l))) | |
6cb702da | 1593 | res = SCM_EVALIM (SCM_CAR (l), env); |
680ed4a8 MD |
1594 | else |
1595 | res = EVALCELLCAR (l, env); | |
1596 | } | |
1597 | else if (SCM_TYP3 (l) == 1) | |
1598 | { | |
1599 | if ((res = SCM_GLOC_VAL (SCM_CAR (l))) == 0) | |
1600 | res = SCM_CAR (l); /* struct planted in code */ | |
1601 | } | |
1602 | else | |
1603 | goto wrongnumargs; | |
1604 | #else | |
1605 | res = EVALCAR (l, env); | |
1606 | #endif | |
1607 | *lloc = scm_cons (res, SCM_EOL); | |
a23afe53 | 1608 | lloc = SCM_CDRLOC (*lloc); |
6dbd0af5 MD |
1609 | l = SCM_CDR (l); |
1610 | } | |
cf7c17e9 | 1611 | #ifdef SCM_CAUTIOUS |
680ed4a8 MD |
1612 | if (SCM_NNULLP (l)) |
1613 | { | |
1614 | wrongnumargs: | |
1615 | scm_wrong_num_args (proc); | |
1616 | } | |
1617 | #endif | |
1618 | return results; | |
6dbd0af5 | 1619 | } |
c4ac4d88 JB |
1620 | |
1621 | ||
0f2d19dd JB |
1622 | #endif /* !DEVAL */ |
1623 | ||
6dbd0af5 MD |
1624 | |
1625 | /* SECTION: This code is specific for the debugging support. One | |
1626 | * branch is read when DEVAL isn't defined, the other when DEVAL is | |
1627 | * defined. | |
1628 | */ | |
1629 | ||
1630 | #ifndef DEVAL | |
1631 | ||
1632 | #define SCM_APPLY scm_apply | |
1633 | #define PREP_APPLY(proc, args) | |
1634 | #define ENTER_APPLY | |
1635 | #define RETURN(x) return x; | |
b7ff98dd MD |
1636 | #ifdef STACK_CHECKING |
1637 | #ifndef NO_CEVAL_STACK_CHECKING | |
1638 | #define EVAL_STACK_CHECKING | |
1639 | #endif | |
6dbd0af5 MD |
1640 | #endif |
1641 | ||
1642 | #else /* !DEVAL */ | |
1643 | ||
0f2d19dd JB |
1644 | #undef SCM_CEVAL |
1645 | #define SCM_CEVAL scm_deval /* Substitute all uses of scm_ceval */ | |
1646 | #undef SCM_APPLY | |
1647 | #define SCM_APPLY scm_dapply | |
6dbd0af5 MD |
1648 | #undef PREP_APPLY |
1649 | #define PREP_APPLY(p, l) \ | |
1650 | { ++debug.info; debug.info->a.proc = p; debug.info->a.args = l; } | |
1651 | #undef ENTER_APPLY | |
1652 | #define ENTER_APPLY \ | |
1653 | {\ | |
b7ff98dd | 1654 | SCM_SET_ARGSREADY (debug);\ |
b6d75948 | 1655 | if (CHECK_APPLY && SCM_TRAPS_P)\ |
b7ff98dd | 1656 | if (SCM_APPLY_FRAME_P || (SCM_TRACE_P && PROCTRACEP (proc)))\ |
6dbd0af5 | 1657 | {\ |
b7ff98dd | 1658 | SCM tmp, tail = SCM_TRACED_FRAME_P (debug) ? SCM_BOOL_T : SCM_BOOL_F;\ |
c6a4fbce | 1659 | SCM_SET_TRACED_FRAME (debug); \ |
b7ff98dd | 1660 | if (SCM_CHEAPTRAPS_P)\ |
6dbd0af5 | 1661 | {\ |
c0ab1b8d | 1662 | tmp = scm_make_debugobj (&debug);\ |
2f0d1375 | 1663 | scm_ithrow (scm_sym_apply_frame, scm_cons2 (tmp, tail, SCM_EOL), 0);\ |
b6d75948 | 1664 | }\ |
6dbd0af5 MD |
1665 | else\ |
1666 | {\ | |
1667 | scm_make_cont (&tmp);\ | |
ca6ef71a | 1668 | if (!setjmp (SCM_JMPBUF (tmp)))\ |
2f0d1375 | 1669 | scm_ithrow (scm_sym_apply_frame, scm_cons2 (tmp, tail, SCM_EOL), 0);\ |
6dbd0af5 MD |
1670 | }\ |
1671 | }\ | |
1672 | } | |
0f2d19dd JB |
1673 | #undef RETURN |
1674 | #define RETURN(e) {proc = (e); goto exit;} | |
b7ff98dd MD |
1675 | #ifdef STACK_CHECKING |
1676 | #ifndef EVAL_STACK_CHECKING | |
1677 | #define EVAL_STACK_CHECKING | |
1678 | #endif | |
6dbd0af5 MD |
1679 | #endif |
1680 | ||
1681 | /* scm_ceval_ptr points to the currently selected evaluator. | |
1682 | * *fixme*: Although efficiency is important here, this state variable | |
1683 | * should probably not be a global. It should be related to the | |
1684 | * current repl. | |
1685 | */ | |
1686 | ||
1cc91f1b JB |
1687 | |
1688 | SCM (*scm_ceval_ptr) SCM_P ((SCM x, SCM env)); | |
0f2d19dd | 1689 | |
1646d37b | 1690 | /* scm_last_debug_frame contains a pointer to the last debugging |
6dbd0af5 MD |
1691 | * information stack frame. It is accessed very often from the |
1692 | * debugging evaluator, so it should probably not be indirectly | |
1693 | * addressed. Better to save and restore it from the current root at | |
1694 | * any stack swaps. | |
1695 | */ | |
1696 | ||
1646d37b MD |
1697 | #ifndef USE_THREADS |
1698 | scm_debug_frame *scm_last_debug_frame; | |
1699 | #endif | |
6dbd0af5 MD |
1700 | |
1701 | /* scm_debug_eframe_size is the number of slots available for pseudo | |
1702 | * stack frames at each real stack frame. | |
1703 | */ | |
1704 | ||
1705 | int scm_debug_eframe_size; | |
1706 | ||
b7ff98dd | 1707 | int scm_debug_mode, scm_check_entry_p, scm_check_apply_p, scm_check_exit_p; |
6dbd0af5 | 1708 | |
a74145b8 MD |
1709 | int scm_eval_stack; |
1710 | ||
33b97402 | 1711 | scm_option scm_eval_opts[] = { |
a74145b8 | 1712 | { SCM_OPTION_INTEGER, "stack", 22000, "Size of thread stacks (in machine words)." } |
33b97402 MD |
1713 | }; |
1714 | ||
6dbd0af5 | 1715 | scm_option scm_debug_opts[] = { |
b7ff98dd MD |
1716 | { SCM_OPTION_BOOLEAN, "cheap", 1, |
1717 | "*Flyweight representation of the stack at traps." }, | |
1718 | { SCM_OPTION_BOOLEAN, "breakpoints", 0, "*Check for breakpoints." }, | |
1719 | { SCM_OPTION_BOOLEAN, "trace", 0, "*Trace mode." }, | |
1720 | { SCM_OPTION_BOOLEAN, "procnames", 1, | |
1721 | "Record procedure names at definition." }, | |
1722 | { SCM_OPTION_BOOLEAN, "backwards", 0, | |
1723 | "Display backtrace in anti-chronological order." }, | |
4e646a03 MD |
1724 | { SCM_OPTION_INTEGER, "indent", 10, "Maximal indentation in backtrace." }, |
1725 | { SCM_OPTION_INTEGER, "frames", 3, | |
b7ff98dd | 1726 | "Maximum number of tail-recursive frames in backtrace." }, |
4e646a03 MD |
1727 | { SCM_OPTION_INTEGER, "maxdepth", 1000, |
1728 | "Maximal number of stored backtrace frames." }, | |
1729 | { SCM_OPTION_INTEGER, "depth", 20, "Maximal length of printed backtrace." }, | |
11f77bfc MD |
1730 | { SCM_OPTION_BOOLEAN, "backtrace", 0, "Show backtrace on error." }, |
1731 | { SCM_OPTION_BOOLEAN, "debug", 0, "Use the debugging evaluator." }, | |
a74145b8 | 1732 | { SCM_OPTION_INTEGER, "stack", 20000, "Stack size limit (measured in words; 0 = no check)." } |
6dbd0af5 MD |
1733 | }; |
1734 | ||
1735 | scm_option scm_evaluator_trap_table[] = { | |
b6d75948 | 1736 | { SCM_OPTION_BOOLEAN, "traps", 0, "Enable evaluator traps." }, |
b7ff98dd MD |
1737 | { SCM_OPTION_BOOLEAN, "enter-frame", 0, "Trap when eval enters new frame." }, |
1738 | { SCM_OPTION_BOOLEAN, "apply-frame", 0, "Trap when entering apply." }, | |
1739 | { SCM_OPTION_BOOLEAN, "exit-frame", 0, "Trap when exiting eval or apply." } | |
6dbd0af5 MD |
1740 | }; |
1741 | ||
33b97402 MD |
1742 | SCM_PROC (s_eval_options_interface, "eval-options-interface", 0, 1, 0, scm_eval_options_interface); |
1743 | ||
1744 | SCM | |
8ecf1f13 | 1745 | scm_eval_options_interface (SCM setting) |
33b97402 MD |
1746 | { |
1747 | SCM ans; | |
1748 | SCM_DEFER_INTS; | |
1749 | ans = scm_options (setting, | |
1750 | scm_eval_opts, | |
1751 | SCM_N_EVAL_OPTIONS, | |
1752 | s_eval_options_interface); | |
a74145b8 | 1753 | scm_eval_stack = SCM_EVAL_STACK * sizeof (void *); |
33b97402 MD |
1754 | SCM_ALLOW_INTS; |
1755 | return ans; | |
1756 | } | |
1757 | ||
1758 | SCM_PROC (s_evaluator_traps, "evaluator-traps-interface", 0, 1, 0, scm_evaluator_traps); | |
1759 | ||
1760 | SCM | |
1761 | scm_evaluator_traps (setting) | |
1762 | SCM setting; | |
1763 | { | |
1764 | SCM ans; | |
1765 | SCM_DEFER_INTS; | |
1766 | ans = scm_options (setting, | |
1767 | scm_evaluator_trap_table, | |
1768 | SCM_N_EVALUATOR_TRAPS, | |
1769 | s_evaluator_traps); | |
1770 | SCM_RESET_DEBUG_MODE; | |
1771 | SCM_ALLOW_INTS | |
1772 | return ans; | |
1773 | } | |
1774 | ||
6dbd0af5 | 1775 | SCM |
680ed4a8 MD |
1776 | scm_deval_args (l, env, proc, lloc) |
1777 | SCM l, env, proc, *lloc; | |
0f2d19dd | 1778 | { |
680ed4a8 | 1779 | SCM *results = lloc, res; |
0f2d19dd JB |
1780 | while (SCM_NIMP (l)) |
1781 | { | |
cf7c17e9 | 1782 | #ifdef SCM_CAUTIOUS |
680ed4a8 MD |
1783 | if (SCM_IMP (l)) |
1784 | goto wrongnumargs; | |
1785 | else if (SCM_CONSP (l)) | |
1786 | { | |
1787 | if (SCM_IMP (SCM_CAR (l))) | |
6cb702da | 1788 | res = SCM_EVALIM (SCM_CAR (l), env); |
680ed4a8 MD |
1789 | else |
1790 | res = EVALCELLCAR (l, env); | |
1791 | } | |
1792 | else if (SCM_TYP3 (l) == 1) | |
1793 | { | |
1794 | if ((res = SCM_GLOC_VAL (SCM_CAR (l))) == 0) | |
1795 | res = SCM_CAR (l); /* struct planted in code */ | |
1796 | } | |
1797 | else | |
1798 | goto wrongnumargs; | |
1799 | #else | |
1800 | res = EVALCAR (l, env); | |
1801 | #endif | |
1802 | *lloc = scm_cons (res, SCM_EOL); | |
a23afe53 | 1803 | lloc = SCM_CDRLOC (*lloc); |
0f2d19dd JB |
1804 | l = SCM_CDR (l); |
1805 | } | |
cf7c17e9 | 1806 | #ifdef SCM_CAUTIOUS |
680ed4a8 MD |
1807 | if (SCM_NNULLP (l)) |
1808 | { | |
1809 | wrongnumargs: | |
1810 | scm_wrong_num_args (proc); | |
1811 | } | |
1812 | #endif | |
1813 | return *results; | |
0f2d19dd JB |
1814 | } |
1815 | ||
6dbd0af5 MD |
1816 | #endif /* !DEVAL */ |
1817 | ||
1818 | ||
1819 | /* SECTION: Some local definitions for the evaluator. | |
1820 | */ | |
1821 | ||
1822 | #ifndef DEVAL | |
1823 | #ifdef SCM_FLOATS | |
1824 | #define CHECK_EQVISH(A,B) (((A) == (B)) || (SCM_NFALSEP (scm_eqv_p ((A), (B))))) | |
1825 | #else | |
1826 | #define CHECK_EQVISH(A,B) ((A) == (B)) | |
1827 | #endif | |
1828 | #endif /* DEVAL */ | |
1829 | ||
399dedcc | 1830 | #define BUILTIN_RPASUBR /* Handle rpsubrs and asubrs without calling apply */ |
6dbd0af5 MD |
1831 | |
1832 | /* SECTION: This is the evaluator. Like any real monster, it has | |
1833 | * three heads. This code is compiled twice. | |
1834 | */ | |
1835 | ||
0f2d19dd | 1836 | #if 0 |
1cc91f1b | 1837 | |
0f2d19dd JB |
1838 | SCM |
1839 | scm_ceval (x, env) | |
1840 | SCM x; | |
1841 | SCM env; | |
0f2d19dd JB |
1842 | {} |
1843 | #endif | |
1844 | #if 0 | |
1cc91f1b | 1845 | |
0f2d19dd JB |
1846 | SCM |
1847 | scm_deval (x, env) | |
1848 | SCM x; | |
1849 | SCM env; | |
0f2d19dd JB |
1850 | {} |
1851 | #endif | |
1852 | ||
6dbd0af5 | 1853 | SCM |
0f2d19dd JB |
1854 | SCM_CEVAL (x, env) |
1855 | SCM x; | |
1856 | SCM env; | |
1857 | { | |
1858 | union | |
1859 | { | |
1860 | SCM *lloc; | |
1861 | SCM arg1; | |
f8769b1d | 1862 | } t; |
6dbd0af5 MD |
1863 | SCM proc, arg2; |
1864 | #ifdef DEVAL | |
c0ab1b8d JB |
1865 | scm_debug_frame debug; |
1866 | scm_debug_info *debug_info_end; | |
1646d37b | 1867 | debug.prev = scm_last_debug_frame; |
6dbd0af5 | 1868 | debug.status = scm_debug_eframe_size; |
04b6c081 MD |
1869 | /* |
1870 | * The debug.vect contains twice as much scm_debug_info frames as the | |
1871 | * user has specified with (debug-set! frames <n>). | |
1872 | * | |
1873 | * Even frames are eval frames, odd frames are apply frames. | |
1874 | */ | |
c0ab1b8d JB |
1875 | debug.vect = (scm_debug_info *) alloca (scm_debug_eframe_size |
1876 | * sizeof (debug.vect[0])); | |
1877 | debug.info = debug.vect; | |
1878 | debug_info_end = debug.vect + scm_debug_eframe_size; | |
1879 | scm_last_debug_frame = &debug; | |
6dbd0af5 | 1880 | #endif |
b7ff98dd MD |
1881 | #ifdef EVAL_STACK_CHECKING |
1882 | if (SCM_STACK_OVERFLOW_P ((SCM_STACKITEM *) &proc) | |
1883 | && scm_stack_checking_enabled_p) | |
6dbd0af5 | 1884 | { |
b7ff98dd | 1885 | #ifdef DEVAL |
6dbd0af5 MD |
1886 | debug.info->e.exp = x; |
1887 | debug.info->e.env = env; | |
b7ff98dd | 1888 | #endif |
6dbd0af5 MD |
1889 | scm_report_stack_overflow (); |
1890 | } | |
1891 | #endif | |
1892 | #ifdef DEVAL | |
1893 | goto start; | |
1894 | #endif | |
1895 | loopnoap: | |
1896 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
1897 | loop: | |
1898 | #ifdef DEVAL | |
b7ff98dd MD |
1899 | SCM_CLEAR_ARGSREADY (debug); |
1900 | if (SCM_OVERFLOWP (debug)) | |
6dbd0af5 | 1901 | --debug.info; |
04b6c081 MD |
1902 | /* |
1903 | * In theory, this should be the only place where it is necessary to | |
1904 | * check for space in debug.vect since both eval frames and | |
1905 | * available space are even. | |
1906 | * | |
1907 | * For this to be the case, however, it is necessary that primitive | |
1908 | * special forms which jump back to `loop', `begin' or some similar | |
1909 | * label call PREP_APPLY. A convenient way to do this is to jump to | |
1910 | * `loopnoap' or `cdrxnoap'. | |
1911 | */ | |
c0ab1b8d | 1912 | else if (++debug.info >= debug_info_end) |
6dbd0af5 | 1913 | { |
b7ff98dd | 1914 | SCM_SET_OVERFLOW (debug); |
6dbd0af5 MD |
1915 | debug.info -= 2; |
1916 | } | |
1917 | start: | |
1918 | debug.info->e.exp = x; | |
1919 | debug.info->e.env = env; | |
b6d75948 | 1920 | if (CHECK_ENTRY && SCM_TRAPS_P) |
b7ff98dd | 1921 | if (SCM_ENTER_FRAME_P || (SCM_BREAKPOINTS_P && SRCBRKP (x))) |
6dbd0af5 | 1922 | { |
b7ff98dd MD |
1923 | SCM tail = SCM_TAILRECP (debug) ? SCM_BOOL_T : SCM_BOOL_F; |
1924 | SCM_SET_TAILREC (debug); | |
b7ff98dd | 1925 | if (SCM_CHEAPTRAPS_P) |
c0ab1b8d | 1926 | t.arg1 = scm_make_debugobj (&debug); |
6dbd0af5 MD |
1927 | else |
1928 | { | |
1929 | scm_make_cont (&t.arg1); | |
ca6ef71a | 1930 | if (setjmp (SCM_JMPBUF (t.arg1))) |
6dbd0af5 MD |
1931 | { |
1932 | x = SCM_THROW_VALUE (t.arg1); | |
1933 | if (SCM_IMP (x)) | |
1934 | { | |
1935 | RETURN (x); | |
1936 | } | |
1937 | else | |
1938 | /* This gives the possibility for the debugger to | |
1939 | modify the source expression before evaluation. */ | |
1940 | goto dispatch; | |
1941 | } | |
1942 | } | |
2f0d1375 | 1943 | scm_ithrow (scm_sym_enter_frame, |
6dbd0af5 MD |
1944 | scm_cons2 (t.arg1, tail, |
1945 | scm_cons (scm_unmemocopy (x, env), SCM_EOL)), | |
1946 | 0); | |
1947 | } | |
6dbd0af5 | 1948 | #endif |
e3173f93 | 1949 | #if defined (USE_THREADS) || defined (DEVAL) |
f8769b1d | 1950 | dispatch: |
e3173f93 | 1951 | #endif |
9cb5124f | 1952 | SCM_TICK; |
0f2d19dd JB |
1953 | switch (SCM_TYP7 (x)) |
1954 | { | |
1955 | case scm_tcs_symbols: | |
1956 | /* Only happens when called at top level. | |
1957 | */ | |
1958 | x = scm_cons (x, SCM_UNDEFINED); | |
1959 | goto retval; | |
1960 | ||
1961 | case (127 & SCM_IM_AND): | |
1962 | x = SCM_CDR (x); | |
1963 | t.arg1 = x; | |
1964 | while (SCM_NNULLP (t.arg1 = SCM_CDR (t.arg1))) | |
1965 | if (SCM_FALSEP (EVALCAR (x, env))) | |
1966 | { | |
1967 | RETURN (SCM_BOOL_F); | |
1968 | } | |
1969 | else | |
1970 | x = t.arg1; | |
6dbd0af5 | 1971 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
1972 | goto carloop; |
1973 | ||
1974 | case (127 & SCM_IM_BEGIN): | |
6dbd0af5 MD |
1975 | cdrxnoap: |
1976 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
0f2d19dd JB |
1977 | cdrxbegin: |
1978 | x = SCM_CDR (x); | |
1979 | ||
1980 | begin: | |
1981 | t.arg1 = x; | |
1982 | while (SCM_NNULLP (t.arg1 = SCM_CDR (t.arg1))) | |
1983 | { | |
26d5b9b4 MD |
1984 | if (SCM_IMP (SCM_CAR (x))) |
1985 | { | |
1986 | if (SCM_ISYMP (SCM_CAR (x))) | |
1987 | { | |
1988 | x = scm_m_expand_body (x, env); | |
1989 | goto begin; | |
1990 | } | |
1991 | } | |
1992 | else | |
1993 | SCM_CEVAL (SCM_CAR (x), env); | |
0f2d19dd JB |
1994 | x = t.arg1; |
1995 | } | |
1996 | ||
1997 | carloop: /* scm_eval car of last form in list */ | |
1998 | if (SCM_NCELLP (SCM_CAR (x))) | |
1999 | { | |
2000 | x = SCM_CAR (x); | |
6cb702da | 2001 | RETURN (SCM_IMP (x) ? SCM_EVALIM (x, env) : SCM_GLOC_VAL (x)) |
0f2d19dd JB |
2002 | } |
2003 | ||
2004 | if (SCM_SYMBOLP (SCM_CAR (x))) | |
2005 | { | |
2006 | retval: | |
26d5b9b4 | 2007 | RETURN (*scm_lookupcar (x, env, 1)) |
0f2d19dd JB |
2008 | } |
2009 | ||
2010 | x = SCM_CAR (x); | |
2011 | goto loop; /* tail recurse */ | |
2012 | ||
2013 | ||
2014 | case (127 & SCM_IM_CASE): | |
2015 | x = SCM_CDR (x); | |
2016 | t.arg1 = EVALCAR (x, env); | |
2017 | while (SCM_NIMP (x = SCM_CDR (x))) | |
2018 | { | |
2019 | proc = SCM_CAR (x); | |
2f0d1375 | 2020 | if (scm_sym_else == SCM_CAR (proc)) |
0f2d19dd JB |
2021 | { |
2022 | x = SCM_CDR (proc); | |
6dbd0af5 | 2023 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
2024 | goto begin; |
2025 | } | |
2026 | proc = SCM_CAR (proc); | |
2027 | while (SCM_NIMP (proc)) | |
2028 | { | |
2029 | if (CHECK_EQVISH (SCM_CAR (proc), t.arg1)) | |
2030 | { | |
2031 | x = SCM_CDR (SCM_CAR (x)); | |
6dbd0af5 | 2032 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
2033 | goto begin; |
2034 | } | |
2035 | proc = SCM_CDR (proc); | |
2036 | } | |
2037 | } | |
6dbd0af5 | 2038 | RETURN (SCM_UNSPECIFIED) |
0f2d19dd JB |
2039 | |
2040 | ||
2041 | case (127 & SCM_IM_COND): | |
2042 | while (SCM_NIMP (x = SCM_CDR (x))) | |
2043 | { | |
2044 | proc = SCM_CAR (x); | |
2045 | t.arg1 = EVALCAR (proc, env); | |
2046 | if (SCM_NFALSEP (t.arg1)) | |
2047 | { | |
2048 | x = SCM_CDR (proc); | |
6dbd0af5 | 2049 | if SCM_NULLP (x) |
0f2d19dd | 2050 | { |
6dbd0af5 | 2051 | RETURN (t.arg1) |
0f2d19dd | 2052 | } |
2f0d1375 | 2053 | if (scm_sym_arrow != SCM_CAR (x)) |
6dbd0af5 MD |
2054 | { |
2055 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2056 | goto begin; | |
2057 | } | |
0f2d19dd JB |
2058 | proc = SCM_CDR (x); |
2059 | proc = EVALCAR (proc, env); | |
2060 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
6dbd0af5 MD |
2061 | PREP_APPLY (proc, scm_cons (t.arg1, SCM_EOL)); |
2062 | ENTER_APPLY; | |
0f2d19dd JB |
2063 | goto evap1; |
2064 | } | |
2065 | } | |
6dbd0af5 | 2066 | RETURN (SCM_UNSPECIFIED) |
0f2d19dd JB |
2067 | |
2068 | ||
2069 | case (127 & SCM_IM_DO): | |
2070 | x = SCM_CDR (x); | |
2071 | proc = SCM_CAR (SCM_CDR (x)); /* inits */ | |
2072 | t.arg1 = SCM_EOL; /* values */ | |
2073 | while (SCM_NIMP (proc)) | |
2074 | { | |
2075 | t.arg1 = scm_cons (EVALCAR (proc, env), t.arg1); | |
2076 | proc = SCM_CDR (proc); | |
2077 | } | |
e2806c10 | 2078 | env = EXTEND_ENV (SCM_CAR (x), t.arg1, env); |
0f2d19dd JB |
2079 | x = SCM_CDR (SCM_CDR (x)); |
2080 | while (proc = SCM_CAR (x), SCM_FALSEP (EVALCAR (proc, env))) | |
2081 | { | |
f3d2630a | 2082 | for (proc = SCM_CADR (x); SCM_NIMP (proc); proc = SCM_CDR (proc)) |
0f2d19dd JB |
2083 | { |
2084 | t.arg1 = SCM_CAR (proc); /* body */ | |
2085 | SIDEVAL (t.arg1, env); | |
2086 | } | |
f3d2630a MD |
2087 | for (t.arg1 = SCM_EOL, proc = SCM_CDDR (x); |
2088 | SCM_NIMP (proc); | |
2089 | proc = SCM_CDR (proc)) | |
0f2d19dd | 2090 | t.arg1 = scm_cons (EVALCAR (proc, env), t.arg1); /* steps */ |
e2806c10 | 2091 | env = EXTEND_ENV (SCM_CAR (SCM_CAR (env)), t.arg1, SCM_CDR (env)); |
0f2d19dd JB |
2092 | } |
2093 | x = SCM_CDR (proc); | |
2094 | if (SCM_NULLP (x)) | |
6dbd0af5 MD |
2095 | RETURN (SCM_UNSPECIFIED); |
2096 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
0f2d19dd JB |
2097 | goto begin; |
2098 | ||
2099 | ||
2100 | case (127 & SCM_IM_IF): | |
2101 | x = SCM_CDR (x); | |
2102 | if (SCM_NFALSEP (EVALCAR (x, env))) | |
2103 | x = SCM_CDR (x); | |
2104 | else if (SCM_IMP (x = SCM_CDR (SCM_CDR (x)))) | |
2105 | { | |
2106 | RETURN (SCM_UNSPECIFIED); | |
2107 | } | |
6dbd0af5 | 2108 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
2109 | goto carloop; |
2110 | ||
2111 | ||
2112 | case (127 & SCM_IM_LET): | |
2113 | x = SCM_CDR (x); | |
2114 | proc = SCM_CAR (SCM_CDR (x)); | |
2115 | t.arg1 = SCM_EOL; | |
2116 | do | |
2117 | { | |
2118 | t.arg1 = scm_cons (EVALCAR (proc, env), t.arg1); | |
2119 | } | |
2120 | while (SCM_NIMP (proc = SCM_CDR (proc))); | |
e2806c10 | 2121 | env = EXTEND_ENV (SCM_CAR (x), t.arg1, env); |
0f2d19dd | 2122 | x = SCM_CDR (x); |
6dbd0af5 | 2123 | goto cdrxnoap; |
0f2d19dd JB |
2124 | |
2125 | ||
2126 | case (127 & SCM_IM_LETREC): | |
2127 | x = SCM_CDR (x); | |
e2806c10 | 2128 | env = EXTEND_ENV (SCM_CAR (x), scm_undefineds, env); |
0f2d19dd JB |
2129 | x = SCM_CDR (x); |
2130 | proc = SCM_CAR (x); | |
2131 | t.arg1 = SCM_EOL; | |
2132 | do | |
2133 | { | |
2134 | t.arg1 = scm_cons (EVALCAR (proc, env), t.arg1); | |
2135 | } | |
2136 | while (SCM_NIMP (proc = SCM_CDR (proc))); | |
a23afe53 | 2137 | SCM_SETCDR (SCM_CAR (env), t.arg1); |
6dbd0af5 | 2138 | goto cdrxnoap; |
0f2d19dd JB |
2139 | |
2140 | ||
2141 | case (127 & SCM_IM_LETSTAR): | |
2142 | x = SCM_CDR (x); | |
2143 | proc = SCM_CAR (x); | |
2144 | if (SCM_IMP (proc)) | |
2145 | { | |
e2806c10 | 2146 | env = EXTEND_ENV (SCM_EOL, SCM_EOL, env); |
6dbd0af5 | 2147 | goto cdrxnoap; |
0f2d19dd JB |
2148 | } |
2149 | do | |
2150 | { | |
2151 | t.arg1 = SCM_CAR (proc); | |
2152 | proc = SCM_CDR (proc); | |
e2806c10 | 2153 | env = EXTEND_ENV (t.arg1, EVALCAR (proc, env), env); |
0f2d19dd JB |
2154 | } |
2155 | while (SCM_NIMP (proc = SCM_CDR (proc))); | |
6dbd0af5 | 2156 | goto cdrxnoap; |
0f2d19dd JB |
2157 | |
2158 | case (127 & SCM_IM_OR): | |
2159 | x = SCM_CDR (x); | |
2160 | t.arg1 = x; | |
2161 | while (SCM_NNULLP (t.arg1 = SCM_CDR (t.arg1))) | |
2162 | { | |
2163 | x = EVALCAR (x, env); | |
2164 | if (SCM_NFALSEP (x)) | |
2165 | { | |
2166 | RETURN (x); | |
2167 | } | |
2168 | x = t.arg1; | |
2169 | } | |
6dbd0af5 | 2170 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
2171 | goto carloop; |
2172 | ||
2173 | ||
2174 | case (127 & SCM_IM_LAMBDA): | |
2175 | RETURN (scm_closure (SCM_CDR (x), env)); | |
2176 | ||
2177 | ||
2178 | case (127 & SCM_IM_QUOTE): | |
2179 | RETURN (SCM_CAR (SCM_CDR (x))); | |
2180 | ||
2181 | ||
89efbff4 | 2182 | case (127 & SCM_IM_SET_X): |
0f2d19dd JB |
2183 | x = SCM_CDR (x); |
2184 | proc = SCM_CAR (x); | |
6dbd0af5 | 2185 | switch (7 & (int) proc) |
0f2d19dd JB |
2186 | { |
2187 | case 0: | |
26d5b9b4 | 2188 | t.lloc = scm_lookupcar (x, env, 1); |
0f2d19dd JB |
2189 | break; |
2190 | case 1: | |
a23afe53 | 2191 | t.lloc = SCM_GLOC_VAL_LOC (proc); |
0f2d19dd JB |
2192 | break; |
2193 | #ifdef MEMOIZE_LOCALS | |
2194 | case 4: | |
2195 | t.lloc = scm_ilookup (proc, env); | |
2196 | break; | |
2197 | #endif | |
2198 | } | |
2199 | x = SCM_CDR (x); | |
2200 | *t.lloc = EVALCAR (x, env); | |
0f2d19dd JB |
2201 | #ifdef SICP |
2202 | RETURN (*t.lloc); | |
2203 | #else | |
2204 | RETURN (SCM_UNSPECIFIED); | |
2205 | #endif | |
2206 | ||
2207 | ||
2208 | case (127 & SCM_IM_DEFINE): /* only for internal defines */ | |
26d5b9b4 MD |
2209 | scm_misc_error (NULL, "Bad define placement", SCM_EOL); |
2210 | ||
0f2d19dd JB |
2211 | /* new syntactic forms go here. */ |
2212 | case (127 & SCM_MAKISYM (0)): | |
2213 | proc = SCM_CAR (x); | |
2214 | SCM_ASRTGO (SCM_ISYMP (proc), badfun); | |
2215 | switch SCM_ISYMNUM (proc) | |
2216 | { | |
2217 | #if 0 | |
2218 | case (SCM_ISYMNUM (IM_VREF)): | |
2219 | { | |
2220 | SCM var; | |
2221 | var = SCM_CAR (SCM_CDR (x)); | |
2222 | RETURN (SCM_CDR(var)); | |
2223 | } | |
2224 | case (SCM_ISYMNUM (IM_VSET)): | |
2225 | SCM_CDR (SCM_CAR ( SCM_CDR (x))) = EVALCAR( SCM_CDR ( SCM_CDR (x)), env); | |
2226 | SCM_CAR (SCM_CAR ( SCM_CDR (x))) = scm_tc16_variable; | |
6dbd0af5 | 2227 | RETURN (SCM_UNSPECIFIED) |
0f2d19dd JB |
2228 | #endif |
2229 | ||
2230 | case (SCM_ISYMNUM (SCM_IM_APPLY)): | |
2231 | proc = SCM_CDR (x); | |
2232 | proc = EVALCAR (proc, env); | |
2233 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
2234 | if (SCM_CLOSUREP (proc)) | |
2235 | { | |
1609038c | 2236 | SCM argl, tl; |
6dbd0af5 | 2237 | PREP_APPLY (proc, SCM_EOL); |
0f2d19dd JB |
2238 | t.arg1 = SCM_CDR (SCM_CDR (x)); |
2239 | t.arg1 = EVALCAR (t.arg1, env); | |
6dbd0af5 MD |
2240 | #ifdef DEVAL |
2241 | debug.info->a.args = t.arg1; | |
2242 | #endif | |
cf7c17e9 | 2243 | #ifndef SCM_RECKLESS |
0f2d19dd JB |
2244 | if (scm_badargsp (SCM_CAR (SCM_CODE (proc)), t.arg1)) |
2245 | goto wrongnumargs; | |
2246 | #endif | |
c79450dd | 2247 | ENTER_APPLY; |
1609038c MD |
2248 | /* Copy argument list */ |
2249 | if (SCM_IMP (t.arg1)) | |
2250 | argl = t.arg1; | |
2251 | else | |
2252 | { | |
2253 | argl = tl = scm_cons (SCM_CAR (t.arg1), SCM_UNSPECIFIED); | |
2254 | while (SCM_NIMP (t.arg1 = SCM_CDR (t.arg1)) | |
2255 | && SCM_CONSP (t.arg1)) | |
2256 | { | |
2257 | SCM_SETCDR (tl, scm_cons (SCM_CAR (t.arg1), | |
2258 | SCM_UNSPECIFIED)); | |
2259 | tl = SCM_CDR (tl); | |
2260 | } | |
2261 | SCM_SETCDR (tl, t.arg1); | |
2262 | } | |
2263 | ||
2264 | env = EXTEND_ENV (SCM_CAR (SCM_CODE (proc)), argl, SCM_ENV (proc)); | |
0f2d19dd JB |
2265 | x = SCM_CODE (proc); |
2266 | goto cdrxbegin; | |
2267 | } | |
2f0d1375 | 2268 | proc = scm_sym_apply; |
0f2d19dd JB |
2269 | goto evapply; |
2270 | ||
2271 | case (SCM_ISYMNUM (SCM_IM_CONT)): | |
2272 | scm_make_cont (&t.arg1); | |
ca6ef71a | 2273 | if (setjmp (SCM_JMPBUF (t.arg1))) |
0f2d19dd JB |
2274 | { |
2275 | SCM val; | |
2276 | val = SCM_THROW_VALUE (t.arg1); | |
6dbd0af5 | 2277 | RETURN (val); |
0f2d19dd JB |
2278 | } |
2279 | proc = SCM_CDR (x); | |
2280 | proc = evalcar (proc, env); | |
2281 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
6dbd0af5 MD |
2282 | PREP_APPLY (proc, scm_cons (t.arg1, SCM_EOL)); |
2283 | ENTER_APPLY; | |
0f2d19dd JB |
2284 | goto evap1; |
2285 | ||
89efbff4 | 2286 | case (SCM_ISYMNUM (SCM_IM_DISPATCH)): |
f3d2630a MD |
2287 | /* (SCM_IM_DISPATCH ARGS N-SPECIALIZED |
2288 | * #((TYPE1 ... ENV FORMALS FORM ...) ...) | |
2289 | * GF) | |
2290 | */ | |
2291 | case (SCM_ISYMNUM (SCM_IM_HASH_DISPATCH)): | |
2292 | /* (SCM_IM_HASH_DISPATCH ARGS N-SPECIALIZED HASHSET MASK | |
2293 | * #((TYPE1 ... ENV FORMALS FORM ...) ...) | |
2294 | * GF) | |
2295 | * | |
2296 | * ARGS is either a list of expressions, in which case they | |
2297 | * are interpreted as the arguments of an application, or | |
2298 | * a non-pair, which is interpreted as a single expression | |
2299 | * yielding all arguments. | |
2300 | * | |
2301 | * SCM_IM_DISPATCH expressions in generic functions always | |
2302 | * have ARGS = the symbol `args' or the iloc #@0-0. | |
ef67c5ea MD |
2303 | * |
2304 | * Need FORMALS in order to support varying arity. This | |
2305 | * also avoids the need for renaming of bindings. | |
2306 | * | |
2307 | * We should probably not complicate this mechanism by | |
2308 | * introducing "optimizations" for getters and setters or | |
2309 | * primitive methods. Getters and setter will normally be | |
2310 | * compiled into @slot-[ref|set!] or a procedure call. | |
2311 | * They rely on the dispatch performed before executing | |
2312 | * the code which contains them. | |
2313 | * | |
2314 | * We might want to use a more efficient representation of | |
2315 | * this form in the future, perhaps after we have introduced | |
2316 | * low-level support for syntax-case macros. | |
2317 | */ | |
89efbff4 | 2318 | { |
ef67c5ea | 2319 | int i, n, end, mask; |
f3d2630a MD |
2320 | SCM z = SCM_CADR (x); /* unevaluated operands */ |
2321 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2322 | if (SCM_IMP (z)) | |
2323 | arg2 = *scm_ilookup (z, env); | |
2324 | else if (SCM_NCONSP (z)) | |
2325 | { | |
2326 | if (SCM_NCELLP (z)) | |
2327 | arg2 = SCM_GLOC_VAL (z); | |
2328 | else | |
2329 | arg2 = *scm_lookupcar (SCM_CDR (x), env, 1); | |
2330 | } | |
2331 | else | |
2332 | { | |
2333 | arg2 = scm_cons (EVALCAR (z, env), SCM_EOL); | |
2334 | t.lloc = SCM_CDRLOC (arg2); | |
2335 | while (SCM_NIMP (z = SCM_CDR (z))) | |
2336 | { | |
2337 | *t.lloc = scm_cons (EVALCAR (z, env), SCM_EOL); | |
2338 | t.lloc = SCM_CDRLOC (*t.lloc); | |
2339 | } | |
2340 | } | |
2341 | ||
2342 | type_dispatch: | |
2343 | z = SCM_CDDR (x); | |
2344 | n = SCM_INUM (SCM_CAR (z)); /* maximum number of specializers */ | |
2345 | proc = SCM_CADR (z); /* method cache */ | |
2346 | ||
2347 | if (SCM_NIMP (proc)) | |
2348 | { | |
2349 | /* Prepare for linear search */ | |
2350 | mask = -1; | |
2351 | i = 0; | |
2352 | end = SCM_LENGTH (proc); | |
2353 | } | |
2354 | else | |
2355 | { | |
2356 | /* Compute a hash value */ | |
2357 | int hashset = SCM_INUM (proc); | |
2358 | int j = n; | |
2359 | mask = SCM_INUM (SCM_CAR (z = SCM_CDDR (z))); | |
2360 | proc = SCM_CADR (z); | |
2361 | i = 0; | |
2362 | t.arg1 = arg2; | |
2363 | do | |
2364 | { | |
2365 | i += (SCM_STRUCT_DATA (scm_class_of (SCM_CAR (t.arg1))) | |
2366 | [scm_si_hashsets + hashset]); | |
2367 | t.arg1 = SCM_CDR (t.arg1); | |
2368 | } | |
2369 | while (--j && SCM_NIMP (t.arg1)); | |
2370 | i &= mask; | |
2371 | end = i; | |
2372 | } | |
2373 | ||
2374 | /* Search for match */ | |
89efbff4 MD |
2375 | do |
2376 | { | |
ef67c5ea | 2377 | int j = n; |
f3d2630a MD |
2378 | SCM entry = SCM_VELTS (proc)[i]; |
2379 | t.arg1 = arg2; /* list of arguments */ | |
89efbff4 MD |
2380 | do |
2381 | { | |
ef67c5ea | 2382 | /* More arguments than specifiers => CLASS != ENV */ |
f3d2630a | 2383 | if (scm_class_of (SCM_CAR (t.arg1)) != SCM_CAR (entry)) |
89efbff4 MD |
2384 | goto next_method; |
2385 | t.arg1 = SCM_CDR (t.arg1); | |
f3d2630a | 2386 | entry = SCM_CDR (entry); |
89efbff4 | 2387 | } |
ef67c5ea MD |
2388 | while (--j && SCM_NIMP (t.arg1)); |
2389 | /* Fewer arguments than specifiers => CAR != ENV */ | |
f3d2630a | 2390 | if (!SCM_CONSP (SCM_CAR (entry))) |
ef67c5ea MD |
2391 | goto next_method; |
2392 | /* Copy the environment frame so that the dispatch form can | |
2393 | be used also in normal code. */ | |
f3d2630a MD |
2394 | env = EXTEND_ENV (SCM_CADR (entry), arg2, SCM_CAR (entry)); |
2395 | x = SCM_CDR (entry); | |
2396 | goto cdrxbegin; | |
89efbff4 MD |
2397 | next_method: |
2398 | i = (i + 1) & mask; | |
2399 | } while (i != end); | |
f3d2630a MD |
2400 | |
2401 | /* No match - call external function and try again */ | |
2402 | scm_memoize_method (x, arg2); | |
2403 | goto type_dispatch; | |
89efbff4 | 2404 | } |
73b64342 | 2405 | |
ca4be6ea MD |
2406 | case (SCM_ISYMNUM (SCM_IM_SLOT_REF)): |
2407 | x = SCM_CDR (x); | |
2408 | t.arg1 = EVALCAR (x, env); | |
2409 | RETURN (SCM_STRUCT_DATA (t.arg1)[SCM_INUM (SCM_CADR (x))]); | |
2410 | ||
2411 | case (SCM_ISYMNUM (SCM_IM_SLOT_SET_X)): | |
2412 | x = SCM_CDR (x); | |
2413 | t.arg1 = EVALCAR (x, env); | |
2414 | x = SCM_CDR (x); | |
2415 | proc = SCM_CDR (x); | |
1f325865 MD |
2416 | SCM_STRUCT_DATA (t.arg1)[SCM_INUM (SCM_CAR (x))] |
2417 | = EVALCAR (proc, env); | |
2418 | RETURN (SCM_UNSPECIFIED); | |
ca4be6ea | 2419 | |
73b64342 MD |
2420 | case (SCM_ISYMNUM (SCM_IM_NIL_COND)): |
2421 | proc = SCM_CDR (x); | |
2422 | while (SCM_NIMP (x = SCM_CDR (proc))) | |
2423 | { | |
2424 | if (!(SCM_FALSEP (t.arg1 = EVALCAR (proc, env)) | |
2425 | || t.arg1 == scm_nil)) | |
2426 | { | |
2427 | if (SCM_CAR (x) == SCM_UNSPECIFIED) | |
2428 | RETURN (t.arg1); | |
2429 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2430 | goto carloop; | |
2431 | } | |
2432 | proc = SCM_CDR (x); | |
2433 | } | |
2434 | x = proc; | |
2435 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2436 | goto carloop; | |
2437 | ||
2438 | case (SCM_ISYMNUM (SCM_IM_NIL_IFY)): | |
2439 | x = SCM_CDR (x); | |
2440 | RETURN ((SCM_FALSEP (proc = EVALCAR (x, env)) || SCM_NULLP (proc)) | |
2441 | ? scm_nil | |
2442 | : proc) | |
2443 | ||
2444 | case (SCM_ISYMNUM (SCM_IM_T_IFY)): | |
2445 | x = SCM_CDR (x); | |
2446 | RETURN (SCM_NFALSEP (EVALCAR (x, env)) ? scm_t : scm_nil) | |
2447 | ||
2448 | case (SCM_ISYMNUM (SCM_IM_0_COND)): | |
2449 | proc = SCM_CDR (x); | |
2450 | while (SCM_NIMP (x = SCM_CDR (proc))) | |
2451 | { | |
2452 | if (!(SCM_FALSEP (t.arg1 = EVALCAR (proc, env)) | |
2453 | || t.arg1 == SCM_INUM0)) | |
2454 | { | |
2455 | if (SCM_CAR (x) == SCM_UNSPECIFIED) | |
2456 | RETURN (t.arg1); | |
2457 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2458 | goto carloop; | |
2459 | } | |
2460 | proc = SCM_CDR (x); | |
2461 | } | |
2462 | x = proc; | |
2463 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2464 | goto carloop; | |
2465 | ||
2466 | case (SCM_ISYMNUM (SCM_IM_0_IFY)): | |
2467 | x = SCM_CDR (x); | |
2468 | RETURN (SCM_FALSEP (proc = EVALCAR (x, env)) | |
2469 | ? SCM_INUM0 | |
2470 | : proc) | |
2471 | ||
2472 | case (SCM_ISYMNUM (SCM_IM_1_IFY)): | |
2473 | x = SCM_CDR (x); | |
2474 | RETURN (SCM_NFALSEP (EVALCAR (x, env)) | |
2475 | ? SCM_MAKINUM (1) | |
2476 | : SCM_INUM0) | |
2477 | ||
2478 | case (SCM_ISYMNUM (SCM_IM_BIND)): | |
2479 | x = SCM_CDR (x); | |
2480 | ||
2481 | t.arg1 = SCM_CAR (x); | |
2482 | arg2 = SCM_CDAR (env); | |
2483 | while (SCM_NIMP (arg2)) | |
2484 | { | |
2485 | proc = SCM_GLOC_VAL (SCM_CAR (t.arg1)); | |
2486 | SCM_SETCDR (SCM_CAR (t.arg1) - 1L, SCM_CAR (arg2)); | |
2487 | SCM_SETCAR (arg2, proc); | |
2488 | t.arg1 = SCM_CDR (t.arg1); | |
2489 | arg2 = SCM_CDR (arg2); | |
2490 | } | |
2491 | t.arg1 = SCM_CAR (x); | |
2492 | scm_dynwinds = scm_acons (t.arg1, SCM_CDAR (env), scm_dynwinds); | |
89efbff4 | 2493 | |
73b64342 MD |
2494 | arg2 = x = SCM_CDR (x); |
2495 | while (SCM_NNULLP (arg2 = SCM_CDR (arg2))) | |
2496 | { | |
2497 | SIDEVAL (SCM_CAR (x), env); | |
2498 | x = arg2; | |
2499 | } | |
2500 | proc = EVALCAR (x, env); | |
2501 | ||
2502 | scm_dynwinds = SCM_CDR (scm_dynwinds); | |
2503 | arg2 = SCM_CDAR (env); | |
2504 | while (SCM_NIMP (arg2)) | |
2505 | { | |
2506 | SCM_SETCDR (SCM_CAR (t.arg1) - 1L, SCM_CAR (arg2)); | |
2507 | t.arg1 = SCM_CDR (t.arg1); | |
2508 | arg2 = SCM_CDR (arg2); | |
2509 | } | |
2510 | ||
2511 | RETURN (proc) | |
2512 | ||
0f2d19dd JB |
2513 | default: |
2514 | goto badfun; | |
2515 | } | |
2516 | ||
2517 | default: | |
2518 | proc = x; | |
2519 | badfun: | |
f5bf2977 | 2520 | /* scm_everr (x, env,...) */ |
523f5266 GH |
2521 | scm_misc_error (NULL, |
2522 | "Wrong type to apply: %S", | |
2523 | scm_listify (proc, SCM_UNDEFINED)); | |
0f2d19dd JB |
2524 | case scm_tc7_vector: |
2525 | case scm_tc7_wvect: | |
2526 | case scm_tc7_bvect: | |
2527 | case scm_tc7_byvect: | |
2528 | case scm_tc7_svect: | |
2529 | case scm_tc7_ivect: | |
2530 | case scm_tc7_uvect: | |
2531 | case scm_tc7_fvect: | |
2532 | case scm_tc7_dvect: | |
2533 | case scm_tc7_cvect: | |
2534 | #ifdef LONGLONGS | |
2535 | case scm_tc7_llvect: | |
2536 | #endif | |
2537 | case scm_tc7_string: | |
0f2d19dd | 2538 | case scm_tc7_substring: |
0f2d19dd JB |
2539 | case scm_tc7_smob: |
2540 | case scm_tcs_closures: | |
224822be MD |
2541 | #ifdef CCLO |
2542 | case scm_tc7_cclo: | |
2543 | #endif | |
89efbff4 | 2544 | case scm_tc7_pws: |
0f2d19dd JB |
2545 | case scm_tcs_subrs: |
2546 | RETURN (x); | |
2547 | ||
2548 | #ifdef MEMOIZE_LOCALS | |
2549 | case (127 & SCM_ILOC00): | |
2550 | proc = *scm_ilookup (SCM_CAR (x), env); | |
2551 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
cf7c17e9 JB |
2552 | #ifndef SCM_RECKLESS |
2553 | #ifdef SCM_CAUTIOUS | |
0f2d19dd JB |
2554 | goto checkargs; |
2555 | #endif | |
2556 | #endif | |
2557 | break; | |
2558 | #endif /* ifdef MEMOIZE_LOCALS */ | |
2559 | ||
2560 | ||
2561 | case scm_tcs_cons_gloc: | |
2562 | proc = SCM_GLOC_VAL (SCM_CAR (x)); | |
aa00bd1e MD |
2563 | if (proc == 0) |
2564 | /* This is a struct implanted in the code, not a gloc. */ | |
2565 | RETURN (x); | |
0f2d19dd | 2566 | SCM_ASRTGO (SCM_NIMP (proc), badfun); |
cf7c17e9 JB |
2567 | #ifndef SCM_RECKLESS |
2568 | #ifdef SCM_CAUTIOUS | |
0f2d19dd JB |
2569 | goto checkargs; |
2570 | #endif | |
2571 | #endif | |
2572 | break; | |
2573 | ||
2574 | ||
2575 | case scm_tcs_cons_nimcar: | |
2576 | if (SCM_SYMBOLP (SCM_CAR (x))) | |
2577 | { | |
f8769b1d | 2578 | #ifdef USE_THREADS |
26d5b9b4 | 2579 | t.lloc = scm_lookupcar1 (x, env, 1); |
f8769b1d MV |
2580 | if (t.lloc == NULL) |
2581 | { | |
2582 | /* we have lost the race, start again. */ | |
2583 | goto dispatch; | |
2584 | } | |
2585 | proc = *t.lloc; | |
2586 | #else | |
26d5b9b4 | 2587 | proc = *scm_lookupcar (x, env, 1); |
f8769b1d MV |
2588 | #endif |
2589 | ||
0f2d19dd JB |
2590 | if (SCM_IMP (proc)) |
2591 | { | |
2592 | unmemocar (x, env); | |
2593 | goto badfun; | |
2594 | } | |
2595 | if (scm_tc16_macro == SCM_TYP16 (proc)) | |
2596 | { | |
2597 | unmemocar (x, env); | |
2598 | ||
2599 | handle_a_macro: | |
368bf056 | 2600 | #ifdef DEVAL |
7c354052 MD |
2601 | /* Set a flag during macro expansion so that macro |
2602 | application frames can be deleted from the backtrace. */ | |
2603 | SCM_SET_MACROEXP (debug); | |
368bf056 | 2604 | #endif |
f8769b1d MV |
2605 | t.arg1 = SCM_APPLY (SCM_CDR (proc), x, |
2606 | scm_cons (env, scm_listofnull)); | |
2607 | ||
7c354052 MD |
2608 | #ifdef DEVAL |
2609 | SCM_CLEAR_MACROEXP (debug); | |
2610 | #endif | |
0f2d19dd JB |
2611 | switch ((int) (SCM_CAR (proc) >> 16)) |
2612 | { | |
2613 | case 2: | |
2614 | if (scm_ilength (t.arg1) <= 0) | |
2615 | t.arg1 = scm_cons2 (SCM_IM_BEGIN, t.arg1, SCM_EOL); | |
6dbd0af5 MD |
2616 | #ifdef DEVAL |
2617 | if (!SCM_CLOSUREP (SCM_CDR (proc))) | |
2618 | { | |
f8769b1d | 2619 | |
6dbd0af5 MD |
2620 | #if 0 /* Top-level defines doesn't very often occur in backtraces */ |
2621 | if (scm_m_define == SCM_SUBRF (SCM_CDR (proc)) && SCM_TOP_LEVEL (env)) | |
2622 | /* Prevent memoizing result of define macro */ | |
2623 | { | |
2624 | debug.info->e.exp = scm_cons (SCM_CAR (x), SCM_CDR (x)); | |
2625 | scm_set_source_properties_x (debug.info->e.exp, | |
2626 | scm_source_properties (x)); | |
2627 | } | |
2628 | #endif | |
2629 | SCM_DEFER_INTS; | |
a23afe53 MD |
2630 | SCM_SETCAR (x, SCM_CAR (t.arg1)); |
2631 | SCM_SETCDR (x, SCM_CDR (t.arg1)); | |
6dbd0af5 MD |
2632 | SCM_ALLOW_INTS; |
2633 | goto dispatch; | |
2634 | } | |
2635 | /* Prevent memoizing of debug info expression. */ | |
6203706f MD |
2636 | debug.info->e.exp = scm_cons_source (debug.info->e.exp, |
2637 | SCM_CAR (x), | |
2638 | SCM_CDR (x)); | |
6dbd0af5 | 2639 | #endif |
0f2d19dd | 2640 | SCM_DEFER_INTS; |
a23afe53 MD |
2641 | SCM_SETCAR (x, SCM_CAR (t.arg1)); |
2642 | SCM_SETCDR (x, SCM_CDR (t.arg1)); | |
0f2d19dd | 2643 | SCM_ALLOW_INTS; |
6dbd0af5 | 2644 | goto loopnoap; |
0f2d19dd JB |
2645 | case 1: |
2646 | if (SCM_NIMP (x = t.arg1)) | |
6dbd0af5 | 2647 | goto loopnoap; |
0f2d19dd JB |
2648 | case 0: |
2649 | RETURN (t.arg1); | |
2650 | } | |
2651 | } | |
2652 | } | |
2653 | else | |
2654 | proc = SCM_CEVAL (SCM_CAR (x), env); | |
2655 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
cf7c17e9 JB |
2656 | #ifndef SCM_RECKLESS |
2657 | #ifdef SCM_CAUTIOUS | |
0f2d19dd JB |
2658 | checkargs: |
2659 | #endif | |
2660 | if (SCM_CLOSUREP (proc)) | |
2661 | { | |
2662 | arg2 = SCM_CAR (SCM_CODE (proc)); | |
2663 | t.arg1 = SCM_CDR (x); | |
2664 | while (SCM_NIMP (arg2)) | |
2665 | { | |
2666 | if (SCM_NCONSP (arg2)) | |
2667 | goto evapply; | |
2668 | if (SCM_IMP (t.arg1)) | |
2669 | goto umwrongnumargs; | |
2670 | arg2 = SCM_CDR (arg2); | |
2671 | t.arg1 = SCM_CDR (t.arg1); | |
2672 | } | |
2673 | if (SCM_NNULLP (t.arg1)) | |
2674 | goto umwrongnumargs; | |
2675 | } | |
2676 | else if (scm_tc16_macro == SCM_TYP16 (proc)) | |
2677 | goto handle_a_macro; | |
2678 | #endif | |
2679 | } | |
2680 | ||
2681 | ||
6dbd0af5 MD |
2682 | evapply: |
2683 | PREP_APPLY (proc, SCM_EOL); | |
2684 | if (SCM_NULLP (SCM_CDR (x))) { | |
2685 | ENTER_APPLY; | |
89efbff4 | 2686 | evap0: |
0f2d19dd JB |
2687 | switch (SCM_TYP7 (proc)) |
2688 | { /* no arguments given */ | |
2689 | case scm_tc7_subr_0: | |
2690 | RETURN (SCM_SUBRF (proc) ()); | |
2691 | case scm_tc7_subr_1o: | |
2692 | RETURN (SCM_SUBRF (proc) (SCM_UNDEFINED)); | |
2693 | case scm_tc7_lsubr: | |
2694 | RETURN (SCM_SUBRF (proc) (SCM_EOL)); | |
2695 | case scm_tc7_rpsubr: | |
2696 | RETURN (SCM_BOOL_T); | |
2697 | case scm_tc7_asubr: | |
2698 | RETURN (SCM_SUBRF (proc) (SCM_UNDEFINED, SCM_UNDEFINED)); | |
6dbd0af5 | 2699 | #ifdef CCLO |
0f2d19dd JB |
2700 | case scm_tc7_cclo: |
2701 | t.arg1 = proc; | |
2702 | proc = SCM_CCLO_SUBR (proc); | |
6dbd0af5 MD |
2703 | #ifdef DEVAL |
2704 | debug.info->a.proc = proc; | |
2705 | debug.info->a.args = scm_cons (t.arg1, SCM_EOL); | |
2706 | #endif | |
0f2d19dd | 2707 | goto evap1; |
6dbd0af5 | 2708 | #endif |
89efbff4 MD |
2709 | case scm_tc7_pws: |
2710 | proc = SCM_PROCEDURE (proc); | |
2711 | #ifdef DEVAL | |
2712 | debug.info->a.proc = proc; | |
2713 | #endif | |
2714 | goto evap0; | |
0f2d19dd JB |
2715 | case scm_tcs_closures: |
2716 | x = SCM_CODE (proc); | |
e2806c10 | 2717 | env = EXTEND_ENV (SCM_CAR (x), SCM_EOL, SCM_ENV (proc)); |
0f2d19dd | 2718 | goto cdrxbegin; |
da7f71d7 | 2719 | case scm_tcs_cons_gloc: |
9b07e212 MD |
2720 | if (!SCM_I_OPERATORP (proc)) |
2721 | goto badfun; | |
2722 | else | |
da7f71d7 MD |
2723 | { |
2724 | x = (SCM_I_ENTITYP (proc) | |
2725 | ? SCM_ENTITY_PROC_0 (proc) | |
2726 | : SCM_OPERATOR_PROC_0 (proc)); | |
2727 | if (SCM_NIMP (x)) | |
33b97402 MD |
2728 | { |
2729 | if (SCM_TYP7 (x) == scm_tc7_subr_1) | |
2730 | RETURN (SCM_SUBRF (x) (proc)) | |
2731 | else if (SCM_CLOSUREP (x)) | |
2732 | { | |
2733 | t.arg1 = proc; | |
2734 | proc = x; | |
da7f71d7 | 2735 | #ifdef DEVAL |
33b97402 MD |
2736 | debug.info->a.args = scm_cons (t.arg1, SCM_EOL); |
2737 | debug.info->a.proc = proc; | |
da7f71d7 | 2738 | #endif |
33b97402 MD |
2739 | goto clos1; |
2740 | } | |
2741 | } | |
da7f71d7 MD |
2742 | /* Fall through. */ |
2743 | } | |
0f2d19dd JB |
2744 | case scm_tc7_contin: |
2745 | case scm_tc7_subr_1: | |
2746 | case scm_tc7_subr_2: | |
2747 | case scm_tc7_subr_2o: | |
2748 | case scm_tc7_cxr: | |
2749 | case scm_tc7_subr_3: | |
2750 | case scm_tc7_lsubr_2: | |
2751 | umwrongnumargs: | |
2752 | unmemocar (x, env); | |
2753 | wrongnumargs: | |
f5bf2977 GH |
2754 | /* scm_everr (x, env,...) */ |
2755 | scm_wrong_num_args (proc); | |
0f2d19dd JB |
2756 | default: |
2757 | /* handle macros here */ | |
2758 | goto badfun; | |
2759 | } | |
6dbd0af5 | 2760 | } |
0f2d19dd JB |
2761 | |
2762 | /* must handle macros by here */ | |
2763 | x = SCM_CDR (x); | |
cf7c17e9 | 2764 | #ifdef SCM_CAUTIOUS |
0f2d19dd JB |
2765 | if (SCM_IMP (x)) |
2766 | goto wrongnumargs; | |
680ed4a8 MD |
2767 | else if (SCM_CONSP (x)) |
2768 | { | |
2769 | if (SCM_IMP (SCM_CAR (x))) | |
6cb702da | 2770 | t.arg1 = SCM_EVALIM (SCM_CAR (x), env); |
680ed4a8 MD |
2771 | else |
2772 | t.arg1 = EVALCELLCAR (x, env); | |
2773 | } | |
2774 | else if (SCM_TYP3 (x) == 1) | |
2775 | { | |
2776 | if ((t.arg1 = SCM_GLOC_VAL (SCM_CAR (x))) == 0) | |
2777 | t.arg1 = SCM_CAR (x); /* struct planted in code */ | |
2778 | } | |
2779 | else | |
2780 | goto wrongnumargs; | |
2781 | #else | |
0f2d19dd | 2782 | t.arg1 = EVALCAR (x, env); |
680ed4a8 | 2783 | #endif |
6dbd0af5 MD |
2784 | #ifdef DEVAL |
2785 | debug.info->a.args = scm_cons (t.arg1, SCM_EOL); | |
2786 | #endif | |
0f2d19dd JB |
2787 | x = SCM_CDR (x); |
2788 | if (SCM_NULLP (x)) | |
2789 | { | |
6dbd0af5 | 2790 | ENTER_APPLY; |
0f2d19dd JB |
2791 | evap1: |
2792 | switch (SCM_TYP7 (proc)) | |
6dbd0af5 | 2793 | { /* have one argument in t.arg1 */ |
0f2d19dd JB |
2794 | case scm_tc7_subr_2o: |
2795 | RETURN (SCM_SUBRF (proc) (t.arg1, SCM_UNDEFINED)); | |
2796 | case scm_tc7_subr_1: | |
2797 | case scm_tc7_subr_1o: | |
2798 | RETURN (SCM_SUBRF (proc) (t.arg1)); | |
2799 | case scm_tc7_cxr: | |
2800 | #ifdef SCM_FLOATS | |
2801 | if (SCM_SUBRF (proc)) | |
2802 | { | |
2803 | if (SCM_INUMP (t.arg1)) | |
2804 | { | |
2805 | RETURN (scm_makdbl (SCM_DSUBRF (proc) ((double) SCM_INUM (t.arg1)), | |
2806 | 0.0)); | |
2807 | } | |
2808 | SCM_ASRTGO (SCM_NIMP (t.arg1), floerr); | |
2809 | if (SCM_REALP (t.arg1)) | |
2810 | { | |
2811 | RETURN (scm_makdbl (SCM_DSUBRF (proc) (SCM_REALPART (t.arg1)), 0.0)); | |
2812 | } | |
2813 | #ifdef SCM_BIGDIG | |
2814 | if (SCM_BIGP (t.arg1)) | |
2815 | { | |
2816 | RETURN (scm_makdbl (SCM_DSUBRF (proc) (scm_big2dbl (t.arg1)), 0.0)); | |
2817 | } | |
2818 | #endif | |
2819 | floerr: | |
2820 | scm_wta (t.arg1, (char *) SCM_ARG1, SCM_CHARS (SCM_SNAME (proc))); | |
2821 | } | |
2822 | #endif | |
2823 | proc = (SCM) SCM_SNAME (proc); | |
2824 | { | |
2825 | char *chrs = SCM_CHARS (proc) + SCM_LENGTH (proc) - 1; | |
2826 | while ('c' != *--chrs) | |
2827 | { | |
2828 | SCM_ASSERT (SCM_NIMP (t.arg1) && SCM_CONSP (t.arg1), | |
2829 | t.arg1, SCM_ARG1, SCM_CHARS (proc)); | |
2830 | t.arg1 = ('a' == *chrs) ? SCM_CAR (t.arg1) : SCM_CDR (t.arg1); | |
2831 | } | |
2832 | RETURN (t.arg1); | |
2833 | } | |
2834 | case scm_tc7_rpsubr: | |
2835 | RETURN (SCM_BOOL_T); | |
2836 | case scm_tc7_asubr: | |
2837 | RETURN (SCM_SUBRF (proc) (t.arg1, SCM_UNDEFINED)); | |
2838 | case scm_tc7_lsubr: | |
2839 | #ifdef DEVAL | |
6dbd0af5 | 2840 | RETURN (SCM_SUBRF (proc) (debug.info->a.args)) |
0f2d19dd JB |
2841 | #else |
2842 | RETURN (SCM_SUBRF (proc) (scm_cons (t.arg1, SCM_EOL))); | |
2843 | #endif | |
6dbd0af5 | 2844 | #ifdef CCLO |
0f2d19dd JB |
2845 | case scm_tc7_cclo: |
2846 | arg2 = t.arg1; | |
2847 | t.arg1 = proc; | |
2848 | proc = SCM_CCLO_SUBR (proc); | |
6dbd0af5 MD |
2849 | #ifdef DEVAL |
2850 | debug.info->a.args = scm_cons (t.arg1, debug.info->a.args); | |
2851 | debug.info->a.proc = proc; | |
2852 | #endif | |
0f2d19dd | 2853 | goto evap2; |
6dbd0af5 | 2854 | #endif |
89efbff4 MD |
2855 | case scm_tc7_pws: |
2856 | proc = SCM_PROCEDURE (proc); | |
2857 | #ifdef DEVAL | |
2858 | debug.info->a.proc = proc; | |
2859 | #endif | |
2860 | goto evap1; | |
0f2d19dd | 2861 | case scm_tcs_closures: |
da7f71d7 | 2862 | clos1: |
0f2d19dd JB |
2863 | x = SCM_CODE (proc); |
2864 | #ifdef DEVAL | |
e2806c10 | 2865 | env = EXTEND_ENV (SCM_CAR (x), debug.info->a.args, SCM_ENV (proc)); |
0f2d19dd | 2866 | #else |
e2806c10 | 2867 | env = EXTEND_ENV (SCM_CAR (x), scm_cons (t.arg1, SCM_EOL), SCM_ENV (proc)); |
0f2d19dd JB |
2868 | #endif |
2869 | goto cdrxbegin; | |
65e41721 MD |
2870 | case scm_tc7_contin: |
2871 | scm_call_continuation (proc, t.arg1); | |
0c32d76c | 2872 | case scm_tcs_cons_gloc: |
f3d2630a MD |
2873 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) |
2874 | { | |
2875 | #ifdef DEVAL | |
2876 | arg2 = debug.info->a.args; | |
2877 | #else | |
2878 | arg2 = scm_cons (t.arg1, SCM_EOL); | |
2879 | #endif | |
2880 | x = SCM_ENTITY_PROC_1 (proc); | |
2881 | goto type_dispatch; | |
2882 | } | |
2883 | else if (!SCM_I_OPERATORP (proc)) | |
9b07e212 MD |
2884 | goto badfun; |
2885 | else | |
0c32d76c | 2886 | { |
da7f71d7 MD |
2887 | x = (SCM_I_ENTITYP (proc) |
2888 | ? SCM_ENTITY_PROC_1 (proc) | |
2889 | : SCM_OPERATOR_PROC_1 (proc)); | |
2890 | if (SCM_NIMP (x)) | |
33b97402 MD |
2891 | { |
2892 | if (SCM_TYP7 (x) == scm_tc7_subr_2) | |
2893 | RETURN (SCM_SUBRF (x) (proc, t.arg1)) | |
2894 | else if (SCM_CLOSUREP (x)) | |
2895 | { | |
2896 | arg2 = t.arg1; | |
2897 | t.arg1 = proc; | |
2898 | proc = x; | |
0c32d76c | 2899 | #ifdef DEVAL |
33b97402 MD |
2900 | debug.info->a.args = scm_cons (t.arg1, |
2901 | debug.info->a.args); | |
2902 | debug.info->a.proc = proc; | |
0c32d76c | 2903 | #endif |
33b97402 MD |
2904 | goto clos2; |
2905 | } | |
2906 | } | |
0c32d76c MD |
2907 | /* Fall through. */ |
2908 | } | |
0f2d19dd JB |
2909 | case scm_tc7_subr_2: |
2910 | case scm_tc7_subr_0: | |
2911 | case scm_tc7_subr_3: | |
2912 | case scm_tc7_lsubr_2: | |
2913 | goto wrongnumargs; | |
2914 | default: | |
2915 | goto badfun; | |
2916 | } | |
2917 | } | |
cf7c17e9 | 2918 | #ifdef SCM_CAUTIOUS |
0f2d19dd JB |
2919 | if (SCM_IMP (x)) |
2920 | goto wrongnumargs; | |
680ed4a8 MD |
2921 | else if (SCM_CONSP (x)) |
2922 | { | |
2923 | if (SCM_IMP (SCM_CAR (x))) | |
6cb702da | 2924 | arg2 = SCM_EVALIM (SCM_CAR (x), env); |
680ed4a8 MD |
2925 | else |
2926 | arg2 = EVALCELLCAR (x, env); | |
2927 | } | |
2928 | else if (SCM_TYP3 (x) == 1) | |
2929 | { | |
2930 | if ((arg2 = SCM_GLOC_VAL (SCM_CAR (x))) == 0) | |
2931 | arg2 = SCM_CAR (x); /* struct planted in code */ | |
2932 | } | |
2933 | else | |
2934 | goto wrongnumargs; | |
2935 | #else | |
2936 | arg2 = EVALCAR (x, env); | |
0f2d19dd JB |
2937 | #endif |
2938 | { /* have two or more arguments */ | |
6dbd0af5 MD |
2939 | #ifdef DEVAL |
2940 | debug.info->a.args = scm_cons2 (t.arg1, arg2, SCM_EOL); | |
2941 | #endif | |
0f2d19dd JB |
2942 | x = SCM_CDR (x); |
2943 | if (SCM_NULLP (x)) { | |
6dbd0af5 | 2944 | ENTER_APPLY; |
0f2d19dd JB |
2945 | #ifdef CCLO |
2946 | evap2: | |
2947 | #endif | |
6dbd0af5 MD |
2948 | switch (SCM_TYP7 (proc)) |
2949 | { /* have two arguments */ | |
2950 | case scm_tc7_subr_2: | |
2951 | case scm_tc7_subr_2o: | |
2952 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2)); | |
2953 | case scm_tc7_lsubr: | |
0f2d19dd | 2954 | #ifdef DEVAL |
6dbd0af5 MD |
2955 | RETURN (SCM_SUBRF (proc) (debug.info->a.args)) |
2956 | #else | |
2957 | RETURN (SCM_SUBRF (proc) (scm_cons2 (t.arg1, arg2, SCM_EOL))); | |
0f2d19dd | 2958 | #endif |
6dbd0af5 MD |
2959 | case scm_tc7_lsubr_2: |
2960 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, SCM_EOL)); | |
2961 | case scm_tc7_rpsubr: | |
2962 | case scm_tc7_asubr: | |
2963 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2)); | |
2964 | #ifdef CCLO | |
2965 | cclon: | |
2966 | case scm_tc7_cclo: | |
0f2d19dd | 2967 | #ifdef DEVAL |
6dbd0af5 MD |
2968 | RETURN (SCM_APPLY (SCM_CCLO_SUBR (proc), proc, |
2969 | scm_cons (debug.info->a.args, SCM_EOL))); | |
0f2d19dd | 2970 | #else |
6dbd0af5 MD |
2971 | RETURN (SCM_APPLY (SCM_CCLO_SUBR (proc), proc, |
2972 | scm_cons2 (t.arg1, arg2, | |
680ed4a8 | 2973 | scm_cons (scm_eval_args (x, env, proc), |
da7f71d7 | 2974 | SCM_EOL)))); |
0f2d19dd | 2975 | #endif |
6dbd0af5 MD |
2976 | /* case scm_tc7_cclo: |
2977 | x = scm_cons(arg2, scm_eval_args(x, env)); | |
2978 | arg2 = t.arg1; | |
2979 | t.arg1 = proc; | |
2980 | proc = SCM_CCLO_SUBR(proc); | |
2981 | goto evap3; */ | |
2982 | #endif | |
89efbff4 MD |
2983 | case scm_tc7_pws: |
2984 | proc = SCM_PROCEDURE (proc); | |
2985 | #ifdef DEVAL | |
2986 | debug.info->a.proc = proc; | |
2987 | #endif | |
2988 | goto evap2; | |
0c32d76c | 2989 | case scm_tcs_cons_gloc: |
f3d2630a MD |
2990 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) |
2991 | { | |
2992 | #ifdef DEVAL | |
2993 | arg2 = debug.info->a.args; | |
2994 | #else | |
2995 | arg2 = scm_cons2 (t.arg1, arg2, SCM_EOL); | |
2996 | #endif | |
2997 | x = SCM_ENTITY_PROC_2 (proc); | |
2998 | goto type_dispatch; | |
2999 | } | |
3000 | else if (!SCM_I_OPERATORP (proc)) | |
9b07e212 MD |
3001 | goto badfun; |
3002 | else | |
0c32d76c | 3003 | { |
da7f71d7 MD |
3004 | x = (SCM_I_ENTITYP (proc) |
3005 | ? SCM_ENTITY_PROC_2 (proc) | |
3006 | : SCM_OPERATOR_PROC_2 (proc)); | |
3007 | if (SCM_NIMP (x)) | |
33b97402 MD |
3008 | { |
3009 | if (SCM_TYP7 (x) == scm_tc7_subr_3) | |
3010 | RETURN (SCM_SUBRF (x) (proc, t.arg1, arg2)) | |
3011 | else if (SCM_CLOSUREP (x)) | |
3012 | { | |
0c32d76c | 3013 | #ifdef DEVAL |
33b97402 MD |
3014 | SCM_SET_ARGSREADY (debug); |
3015 | debug.info->a.args = scm_cons (proc, | |
3016 | debug.info->a.args); | |
3017 | debug.info->a.proc = x; | |
3018 | #endif | |
3019 | env = EXTEND_ENV (SCM_CAR (SCM_CODE (x)), | |
3020 | scm_cons2 (proc, t.arg1, | |
65e41721 | 3021 | scm_cons (arg2, SCM_EOL)), |
33b97402 MD |
3022 | SCM_ENV (x)); |
3023 | x = SCM_CODE (x); | |
3024 | goto cdrxbegin; | |
3025 | } | |
3026 | } | |
0c32d76c MD |
3027 | /* Fall through. */ |
3028 | } | |
6dbd0af5 MD |
3029 | case scm_tc7_subr_0: |
3030 | case scm_tc7_cxr: | |
3031 | case scm_tc7_subr_1o: | |
3032 | case scm_tc7_subr_1: | |
3033 | case scm_tc7_subr_3: | |
3034 | case scm_tc7_contin: | |
3035 | goto wrongnumargs; | |
3036 | default: | |
3037 | goto badfun; | |
3038 | case scm_tcs_closures: | |
0c32d76c | 3039 | clos2: |
0f2d19dd | 3040 | #ifdef DEVAL |
da7f71d7 MD |
3041 | env = EXTEND_ENV (SCM_CAR (SCM_CODE (proc)), |
3042 | debug.info->a.args, | |
3043 | SCM_ENV (proc)); | |
0f2d19dd | 3044 | #else |
da7f71d7 MD |
3045 | env = EXTEND_ENV (SCM_CAR (SCM_CODE (proc)), |
3046 | scm_cons2 (t.arg1, arg2, SCM_EOL), SCM_ENV (proc)); | |
0f2d19dd | 3047 | #endif |
6dbd0af5 MD |
3048 | x = SCM_CODE (proc); |
3049 | goto cdrxbegin; | |
3050 | } | |
0f2d19dd | 3051 | } |
cf7c17e9 | 3052 | #ifdef SCM_CAUTIOUS |
680ed4a8 MD |
3053 | if (SCM_IMP (x) || SCM_NECONSP (x)) |
3054 | goto wrongnumargs; | |
3055 | #endif | |
0f2d19dd | 3056 | #ifdef DEVAL |
6dbd0af5 | 3057 | debug.info->a.args = scm_cons2 (t.arg1, arg2, |
680ed4a8 MD |
3058 | scm_deval_args (x, env, proc, |
3059 | SCM_CDRLOC (SCM_CDR (debug.info->a.args)))); | |
0f2d19dd | 3060 | #endif |
6dbd0af5 | 3061 | ENTER_APPLY; |
89efbff4 | 3062 | evap3: |
6dbd0af5 MD |
3063 | switch (SCM_TYP7 (proc)) |
3064 | { /* have 3 or more arguments */ | |
0f2d19dd | 3065 | #ifdef DEVAL |
6dbd0af5 MD |
3066 | case scm_tc7_subr_3: |
3067 | SCM_ASRTGO (SCM_NULLP (SCM_CDR (x)), wrongnumargs); | |
da7f71d7 MD |
3068 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, |
3069 | SCM_CADDR (debug.info->a.args))); | |
6dbd0af5 | 3070 | case scm_tc7_asubr: |
399dedcc MD |
3071 | #ifdef BUILTIN_RPASUBR |
3072 | t.arg1 = SCM_SUBRF(proc)(t.arg1, arg2); | |
3073 | arg2 = SCM_CDR (SCM_CDR (debug.info->a.args)); | |
da7f71d7 MD |
3074 | do |
3075 | { | |
3076 | t.arg1 = SCM_SUBRF(proc)(t.arg1, SCM_CAR (arg2)); | |
3077 | arg2 = SCM_CDR (arg2); | |
3078 | } | |
3079 | while (SCM_NIMP (arg2)); | |
399dedcc MD |
3080 | RETURN (t.arg1) |
3081 | #endif /* BUILTIN_RPASUBR */ | |
6dbd0af5 | 3082 | case scm_tc7_rpsubr: |
71d3aa6d MD |
3083 | #ifdef BUILTIN_RPASUBR |
3084 | if (SCM_FALSEP (SCM_SUBRF (proc) (t.arg1, arg2))) | |
3085 | RETURN (SCM_BOOL_F) | |
3086 | t.arg1 = SCM_CDR (SCM_CDR (debug.info->a.args)); | |
da7f71d7 MD |
3087 | do |
3088 | { | |
3089 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg2, SCM_CAR (t.arg1)))) | |
3090 | RETURN (SCM_BOOL_F) | |
3091 | arg2 = SCM_CAR (t.arg1); | |
3092 | t.arg1 = SCM_CDR (t.arg1); | |
3093 | } | |
3094 | while (SCM_NIMP (t.arg1)); | |
71d3aa6d MD |
3095 | RETURN (SCM_BOOL_T) |
3096 | #else /* BUILTIN_RPASUBR */ | |
da7f71d7 MD |
3097 | RETURN (SCM_APPLY (proc, t.arg1, |
3098 | scm_acons (arg2, | |
3099 | SCM_CDR (SCM_CDR (debug.info->a.args)), | |
3100 | SCM_EOL))) | |
71d3aa6d | 3101 | #endif /* BUILTIN_RPASUBR */ |
399dedcc | 3102 | case scm_tc7_lsubr_2: |
da7f71d7 MD |
3103 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, |
3104 | SCM_CDR (SCM_CDR (debug.info->a.args)))) | |
399dedcc MD |
3105 | case scm_tc7_lsubr: |
3106 | RETURN (SCM_SUBRF (proc) (debug.info->a.args)) | |
0f2d19dd | 3107 | #ifdef CCLO |
6dbd0af5 MD |
3108 | case scm_tc7_cclo: |
3109 | goto cclon; | |
0f2d19dd | 3110 | #endif |
89efbff4 MD |
3111 | case scm_tc7_pws: |
3112 | proc = SCM_PROCEDURE (proc); | |
3113 | debug.info->a.proc = proc; | |
3114 | goto evap3; | |
6dbd0af5 | 3115 | case scm_tcs_closures: |
b7ff98dd | 3116 | SCM_SET_ARGSREADY (debug); |
e2806c10 | 3117 | env = EXTEND_ENV (SCM_CAR (SCM_CODE (proc)), |
6dbd0af5 MD |
3118 | debug.info->a.args, |
3119 | SCM_ENV (proc)); | |
3120 | x = SCM_CODE (proc); | |
3121 | goto cdrxbegin; | |
3122 | #else /* DEVAL */ | |
3123 | case scm_tc7_subr_3: | |
3124 | SCM_ASRTGO (SCM_NULLP (SCM_CDR (x)), wrongnumargs); | |
3125 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, EVALCAR (x, env))); | |
3126 | case scm_tc7_asubr: | |
399dedcc | 3127 | #ifdef BUILTIN_RPASUBR |
da7f71d7 MD |
3128 | t.arg1 = SCM_SUBRF (proc) (t.arg1, arg2); |
3129 | do | |
3130 | { | |
3131 | t.arg1 = SCM_SUBRF(proc)(t.arg1, EVALCAR(x, env)); | |
3132 | x = SCM_CDR(x); | |
3133 | } | |
3134 | while (SCM_NIMP (x)); | |
399dedcc MD |
3135 | RETURN (t.arg1) |
3136 | #endif /* BUILTIN_RPASUBR */ | |
6dbd0af5 | 3137 | case scm_tc7_rpsubr: |
71d3aa6d MD |
3138 | #ifdef BUILTIN_RPASUBR |
3139 | if (SCM_FALSEP (SCM_SUBRF (proc) (t.arg1, arg2))) | |
3140 | RETURN (SCM_BOOL_F) | |
da7f71d7 MD |
3141 | do |
3142 | { | |
3143 | t.arg1 = EVALCAR (x, env); | |
3144 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg2, t.arg1))) | |
3145 | RETURN (SCM_BOOL_F) | |
3146 | arg2 = t.arg1; | |
3147 | x = SCM_CDR (x); | |
3148 | } | |
3149 | while (SCM_NIMP (x)); | |
71d3aa6d MD |
3150 | RETURN (SCM_BOOL_T) |
3151 | #else /* BUILTIN_RPASUBR */ | |
da7f71d7 | 3152 | RETURN (SCM_APPLY (proc, t.arg1, |
680ed4a8 MD |
3153 | scm_acons (arg2, |
3154 | scm_eval_args (x, env, proc), | |
3155 | SCM_EOL))); | |
71d3aa6d | 3156 | #endif /* BUILTIN_RPASUBR */ |
6dbd0af5 | 3157 | case scm_tc7_lsubr_2: |
680ed4a8 | 3158 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, scm_eval_args (x, env, proc))); |
6dbd0af5 | 3159 | case scm_tc7_lsubr: |
680ed4a8 MD |
3160 | RETURN (SCM_SUBRF (proc) (scm_cons2 (t.arg1, |
3161 | arg2, | |
3162 | scm_eval_args (x, env, proc)))); | |
0f2d19dd | 3163 | #ifdef CCLO |
6dbd0af5 MD |
3164 | case scm_tc7_cclo: |
3165 | goto cclon; | |
0f2d19dd | 3166 | #endif |
89efbff4 MD |
3167 | case scm_tc7_pws: |
3168 | proc = SCM_PROCEDURE (proc); | |
3169 | goto evap3; | |
6dbd0af5 MD |
3170 | case scm_tcs_closures: |
3171 | #ifdef DEVAL | |
b7ff98dd | 3172 | SCM_SET_ARGSREADY (debug); |
6dbd0af5 | 3173 | #endif |
e2806c10 | 3174 | env = EXTEND_ENV (SCM_CAR (SCM_CODE (proc)), |
680ed4a8 MD |
3175 | scm_cons2 (t.arg1, |
3176 | arg2, | |
3177 | scm_eval_args (x, env, proc)), | |
6dbd0af5 MD |
3178 | SCM_ENV (proc)); |
3179 | x = SCM_CODE (proc); | |
3180 | goto cdrxbegin; | |
0f2d19dd | 3181 | #endif /* DEVAL */ |
0c32d76c | 3182 | case scm_tcs_cons_gloc: |
f3d2630a MD |
3183 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) |
3184 | { | |
3185 | #ifdef DEVAL | |
3186 | arg2 = debug.info->a.args; | |
3187 | #else | |
3188 | arg2 = scm_cons2 (t.arg1, arg2, scm_eval_args (x, env, proc)); | |
3189 | #endif | |
3190 | x = SCM_ENTITY_PROC_3 (proc); | |
3191 | goto type_dispatch; | |
3192 | } | |
3193 | else if (!SCM_I_OPERATORP (proc)) | |
9b07e212 MD |
3194 | goto badfun; |
3195 | else | |
da7f71d7 MD |
3196 | { |
3197 | SCM p = (SCM_I_ENTITYP (proc) | |
3198 | ? SCM_ENTITY_PROC_3 (proc) | |
3199 | : SCM_OPERATOR_PROC_3 (proc)); | |
3200 | if (SCM_NIMP (p)) | |
33b97402 MD |
3201 | { |
3202 | if (SCM_TYP7 (p) == scm_tc7_lsubr_2) | |
da7f71d7 | 3203 | #ifdef DEVAL |
33b97402 MD |
3204 | RETURN (SCM_SUBRF (p) (proc, t.arg1, |
3205 | scm_cons (arg2, SCM_CDDR (debug.info->a.args)))) | |
da7f71d7 | 3206 | #else |
33b97402 MD |
3207 | RETURN (SCM_SUBRF (p) (proc, t.arg1, |
3208 | scm_cons (arg2, | |
680ed4a8 | 3209 | scm_eval_args (x, env, proc)))) |
da7f71d7 | 3210 | #endif |
33b97402 MD |
3211 | else if (SCM_CLOSUREP (p)) |
3212 | { | |
da7f71d7 | 3213 | #ifdef DEVAL |
33b97402 MD |
3214 | SCM_SET_ARGSREADY (debug); |
3215 | debug.info->a.args = scm_cons (proc, debug.info->a.args); | |
3216 | debug.info->a.proc = p; | |
3217 | env = EXTEND_ENV (SCM_CAR (SCM_CODE (p)), | |
3218 | scm_cons2 (proc, t.arg1, | |
3219 | scm_cons (arg2, | |
3220 | SCM_CDDDR (debug.info->a.args))), | |
3221 | SCM_ENV (p)); | |
da7f71d7 | 3222 | #else |
33b97402 MD |
3223 | env = EXTEND_ENV (SCM_CAR (SCM_CODE (p)), |
3224 | scm_cons2 (proc, t.arg1, | |
3225 | scm_cons (arg2, | |
680ed4a8 | 3226 | scm_eval_args (x, env, proc))), |
33b97402 MD |
3227 | SCM_ENV (p)); |
3228 | #endif | |
3229 | x = SCM_CODE (p); | |
3230 | goto cdrxbegin; | |
3231 | } | |
3232 | } | |
da7f71d7 MD |
3233 | /* Fall through. */ |
3234 | } | |
6dbd0af5 MD |
3235 | case scm_tc7_subr_2: |
3236 | case scm_tc7_subr_1o: | |
3237 | case scm_tc7_subr_2o: | |
3238 | case scm_tc7_subr_0: | |
3239 | case scm_tc7_cxr: | |
3240 | case scm_tc7_subr_1: | |
3241 | case scm_tc7_contin: | |
3242 | goto wrongnumargs; | |
3243 | default: | |
3244 | goto badfun; | |
3245 | } | |
0f2d19dd JB |
3246 | } |
3247 | #ifdef DEVAL | |
6dbd0af5 | 3248 | exit: |
b6d75948 | 3249 | if (CHECK_EXIT && SCM_TRAPS_P) |
b7ff98dd | 3250 | if (SCM_EXIT_FRAME_P || (SCM_TRACE_P && SCM_TRACED_FRAME_P (debug))) |
6dbd0af5 | 3251 | { |
b7ff98dd MD |
3252 | SCM_CLEAR_TRACED_FRAME (debug); |
3253 | if (SCM_CHEAPTRAPS_P) | |
c0ab1b8d | 3254 | t.arg1 = scm_make_debugobj (&debug); |
6dbd0af5 MD |
3255 | else |
3256 | { | |
3257 | scm_make_cont (&t.arg1); | |
ca6ef71a | 3258 | if (setjmp (SCM_JMPBUF (t.arg1))) |
6dbd0af5 MD |
3259 | { |
3260 | proc = SCM_THROW_VALUE (t.arg1); | |
3261 | goto ret; | |
3262 | } | |
3263 | } | |
2f0d1375 | 3264 | scm_ithrow (scm_sym_exit_frame, scm_cons2 (t.arg1, proc, SCM_EOL), 0); |
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 | ||
82a2622a | 3278 | /* This code processes the arguments to apply: |
b145c172 JB |
3279 | |
3280 | (apply PROC ARG1 ... ARGS) | |
3281 | ||
82a2622a JB |
3282 | Given a list (ARG1 ... ARGS), this function conses the ARG1 |
3283 | ... arguments onto the front of ARGS, and returns the resulting | |
3284 | list. Note that ARGS is a list; thus, the argument to this | |
3285 | function is a list whose last element is a list. | |
3286 | ||
3287 | Apply calls this function, and applies PROC to the elements of the | |
b145c172 JB |
3288 | result. apply:nconc2last takes care of building the list of |
3289 | arguments, given (ARG1 ... ARGS). | |
3290 | ||
82a2622a JB |
3291 | Rather than do new consing, apply:nconc2last destroys its argument. |
3292 | On that topic, this code came into my care with the following | |
3293 | beautifully cryptic comment on that topic: "This will only screw | |
3294 | you if you do (scm_apply scm_apply '( ... ))" If you know what | |
3295 | they're referring to, send me a patch to this comment. */ | |
b145c172 | 3296 | |
0f2d19dd | 3297 | SCM_PROC(s_nconc2last, "apply:nconc2last", 1, 0, 0, scm_nconc2last); |
1cc91f1b | 3298 | |
0f2d19dd JB |
3299 | SCM |
3300 | scm_nconc2last (lst) | |
3301 | SCM lst; | |
0f2d19dd JB |
3302 | { |
3303 | SCM *lloc; | |
b145c172 | 3304 | SCM_ASSERT (scm_ilength (lst) > 0, lst, SCM_ARG1, s_nconc2last); |
0f2d19dd JB |
3305 | lloc = &lst; |
3306 | while (SCM_NNULLP (SCM_CDR (*lloc))) | |
a23afe53 | 3307 | lloc = SCM_CDRLOC (*lloc); |
b145c172 | 3308 | SCM_ASSERT (scm_ilength (SCM_CAR (*lloc)) >= 0, lst, SCM_ARG1, s_nconc2last); |
0f2d19dd JB |
3309 | *lloc = SCM_CAR (*lloc); |
3310 | return lst; | |
3311 | } | |
3312 | ||
6ded69e1 | 3313 | SCM_GLOBAL_SYMBOL (scm_sym_args, "args"); |
f3d2630a | 3314 | |
0f2d19dd JB |
3315 | #endif /* !DEVAL */ |
3316 | ||
6dbd0af5 MD |
3317 | |
3318 | /* SECTION: When DEVAL is defined this code yields scm_dapply. | |
3319 | * It is compiled twice. | |
3320 | */ | |
3321 | ||
0f2d19dd | 3322 | #if 0 |
1cc91f1b | 3323 | |
0f2d19dd JB |
3324 | SCM |
3325 | scm_apply (proc, arg1, args) | |
3326 | SCM proc; | |
3327 | SCM arg1; | |
3328 | SCM args; | |
0f2d19dd JB |
3329 | {} |
3330 | #endif | |
3331 | ||
3332 | #if 0 | |
1cc91f1b | 3333 | |
0f2d19dd JB |
3334 | SCM |
3335 | scm_dapply (proc, arg1, args) | |
3336 | SCM proc; | |
3337 | SCM arg1; | |
3338 | SCM args; | |
0f2d19dd JB |
3339 | {} |
3340 | #endif | |
3341 | ||
1cc91f1b | 3342 | |
82a2622a JB |
3343 | /* Apply a function to a list of arguments. |
3344 | ||
3345 | This function is exported to the Scheme level as taking two | |
3346 | required arguments and a tail argument, as if it were: | |
3347 | (lambda (proc arg1 . args) ...) | |
3348 | Thus, if you just have a list of arguments to pass to a procedure, | |
3349 | pass the list as ARG1, and '() for ARGS. If you have some fixed | |
3350 | args, pass the first as ARG1, then cons any remaining fixed args | |
3351 | onto the front of your argument list, and pass that as ARGS. */ | |
3352 | ||
0f2d19dd JB |
3353 | SCM |
3354 | SCM_APPLY (proc, arg1, args) | |
3355 | SCM proc; | |
3356 | SCM arg1; | |
3357 | SCM args; | |
0f2d19dd JB |
3358 | { |
3359 | #ifdef DEBUG_EXTENSIONS | |
3360 | #ifdef DEVAL | |
6dbd0af5 | 3361 | scm_debug_frame debug; |
c0ab1b8d | 3362 | scm_debug_info debug_vect_body; |
1646d37b | 3363 | debug.prev = scm_last_debug_frame; |
b7ff98dd | 3364 | debug.status = SCM_APPLYFRAME; |
c0ab1b8d | 3365 | debug.vect = &debug_vect_body; |
6dbd0af5 MD |
3366 | debug.vect[0].a.proc = proc; |
3367 | debug.vect[0].a.args = SCM_EOL; | |
1646d37b | 3368 | scm_last_debug_frame = &debug; |
0f2d19dd | 3369 | #else |
b7ff98dd | 3370 | if (SCM_DEBUGGINGP) |
0f2d19dd JB |
3371 | return scm_dapply (proc, arg1, args); |
3372 | #endif | |
3373 | #endif | |
3374 | ||
3375 | SCM_ASRTGO (SCM_NIMP (proc), badproc); | |
82a2622a JB |
3376 | |
3377 | /* If ARGS is the empty list, then we're calling apply with only two | |
3378 | arguments --- ARG1 is the list of arguments for PROC. Whatever | |
3379 | the case, futz with things so that ARG1 is the first argument to | |
3380 | give to PROC (or SCM_UNDEFINED if no args), and ARGS contains the | |
30000774 JB |
3381 | rest. |
3382 | ||
3383 | Setting the debug apply frame args this way is pretty messy. | |
3384 | Perhaps we should store arg1 and args directly in the frame as | |
3385 | received, and let scm_frame_arguments unpack them, because that's | |
3386 | a relatively rare operation. This works for now; if the Guile | |
3387 | developer archives are still around, see Mikael's post of | |
3388 | 11-Apr-97. */ | |
0f2d19dd JB |
3389 | if (SCM_NULLP (args)) |
3390 | { | |
3391 | if (SCM_NULLP (arg1)) | |
30000774 JB |
3392 | { |
3393 | arg1 = SCM_UNDEFINED; | |
3394 | #ifdef DEVAL | |
3395 | debug.vect[0].a.args = SCM_EOL; | |
3396 | #endif | |
3397 | } | |
0f2d19dd JB |
3398 | else |
3399 | { | |
30000774 JB |
3400 | #ifdef DEVAL |
3401 | debug.vect[0].a.args = arg1; | |
3402 | #endif | |
0f2d19dd JB |
3403 | args = SCM_CDR (arg1); |
3404 | arg1 = SCM_CAR (arg1); | |
3405 | } | |
3406 | } | |
3407 | else | |
3408 | { | |
82a2622a | 3409 | /* SCM_ASRTGO(SCM_NIMP(args) && SCM_CONSP(args), wrongnumargs); */ |
0f2d19dd | 3410 | args = scm_nconc2last (args); |
30000774 JB |
3411 | #ifdef DEVAL |
3412 | debug.vect[0].a.args = scm_cons (arg1, args); | |
3413 | #endif | |
0f2d19dd | 3414 | } |
0f2d19dd | 3415 | #ifdef DEVAL |
b6d75948 | 3416 | if (SCM_ENTER_FRAME_P && SCM_TRAPS_P) |
6dbd0af5 MD |
3417 | { |
3418 | SCM tmp; | |
b7ff98dd | 3419 | if (SCM_CHEAPTRAPS_P) |
c0ab1b8d | 3420 | tmp = scm_make_debugobj (&debug); |
6dbd0af5 MD |
3421 | else |
3422 | { | |
3423 | scm_make_cont (&tmp); | |
ca6ef71a | 3424 | if (setjmp (SCM_JMPBUF (tmp))) |
6dbd0af5 MD |
3425 | goto entap; |
3426 | } | |
2f0d1375 | 3427 | scm_ithrow (scm_sym_enter_frame, scm_cons (tmp, SCM_EOL), 0); |
6dbd0af5 MD |
3428 | } |
3429 | entap: | |
3430 | ENTER_APPLY; | |
3431 | #endif | |
3432 | #ifdef CCLO | |
3433 | tail: | |
0f2d19dd JB |
3434 | #endif |
3435 | switch (SCM_TYP7 (proc)) | |
3436 | { | |
3437 | case scm_tc7_subr_2o: | |
3438 | args = SCM_NULLP (args) ? SCM_UNDEFINED : SCM_CAR (args); | |
3439 | RETURN (SCM_SUBRF (proc) (arg1, args)) | |
3440 | case scm_tc7_subr_2: | |
269861c7 MD |
3441 | SCM_ASRTGO (SCM_NNULLP (args) && SCM_NULLP (SCM_CDR (args)), |
3442 | wrongnumargs); | |
0f2d19dd JB |
3443 | args = SCM_CAR (args); |
3444 | RETURN (SCM_SUBRF (proc) (arg1, args)) | |
3445 | case scm_tc7_subr_0: | |
3446 | SCM_ASRTGO (SCM_UNBNDP (arg1), wrongnumargs); | |
3447 | RETURN (SCM_SUBRF (proc) ()) | |
3448 | case scm_tc7_subr_1: | |
3449 | case scm_tc7_subr_1o: | |
3450 | SCM_ASRTGO (SCM_NULLP (args), wrongnumargs); | |
3451 | RETURN (SCM_SUBRF (proc) (arg1)) | |
3452 | case scm_tc7_cxr: | |
3453 | SCM_ASRTGO (SCM_NULLP (args), wrongnumargs); | |
3454 | #ifdef SCM_FLOATS | |
3455 | if (SCM_SUBRF (proc)) | |
3456 | { | |
6dbd0af5 MD |
3457 | if (SCM_INUMP (arg1)) |
3458 | { | |
3459 | RETURN (scm_makdbl (SCM_DSUBRF (proc) ((double) SCM_INUM (arg1)), 0.0)); | |
3460 | } | |
0f2d19dd | 3461 | SCM_ASRTGO (SCM_NIMP (arg1), floerr); |
6dbd0af5 MD |
3462 | if (SCM_REALP (arg1)) |
3463 | { | |
3464 | RETURN (scm_makdbl (SCM_DSUBRF (proc) (SCM_REALPART (arg1)), 0.0)); | |
3465 | } | |
0f2d19dd | 3466 | #ifdef SCM_BIGDIG |
26d5b9b4 | 3467 | if (SCM_BIGP (arg1)) |
0f2d19dd JB |
3468 | RETURN (scm_makdbl (SCM_DSUBRF (proc) (scm_big2dbl (arg1)), 0.0)) |
3469 | #endif | |
3470 | floerr: | |
3471 | scm_wta (arg1, (char *) SCM_ARG1, SCM_CHARS (SCM_SNAME (proc))); | |
3472 | } | |
3473 | #endif | |
3474 | proc = (SCM) SCM_SNAME (proc); | |
3475 | { | |
3476 | char *chrs = SCM_CHARS (proc) + SCM_LENGTH (proc) - 1; | |
3477 | while ('c' != *--chrs) | |
3478 | { | |
3479 | SCM_ASSERT (SCM_NIMP (arg1) && SCM_CONSP (arg1), | |
3480 | arg1, SCM_ARG1, SCM_CHARS (proc)); | |
3481 | arg1 = ('a' == *chrs) ? SCM_CAR (arg1) : SCM_CDR (arg1); | |
3482 | } | |
3483 | RETURN (arg1) | |
3484 | } | |
3485 | case scm_tc7_subr_3: | |
3486 | RETURN (SCM_SUBRF (proc) (arg1, SCM_CAR (args), SCM_CAR (SCM_CDR (args)))) | |
3487 | case scm_tc7_lsubr: | |
3488 | #ifdef DEVAL | |
6dbd0af5 | 3489 | RETURN (SCM_SUBRF (proc) (SCM_UNBNDP (arg1) ? SCM_EOL : debug.vect[0].a.args)) |
0f2d19dd JB |
3490 | #else |
3491 | RETURN (SCM_SUBRF (proc) (SCM_UNBNDP (arg1) ? SCM_EOL : scm_cons (arg1, args))) | |
3492 | #endif | |
3493 | case scm_tc7_lsubr_2: | |
3494 | SCM_ASRTGO (SCM_NIMP (args) && SCM_CONSP (args), wrongnumargs); | |
3495 | RETURN (SCM_SUBRF (proc) (arg1, SCM_CAR (args), SCM_CDR (args))) | |
3496 | case scm_tc7_asubr: | |
3497 | if (SCM_NULLP (args)) | |
3498 | RETURN (SCM_SUBRF (proc) (arg1, SCM_UNDEFINED)) | |
3499 | while (SCM_NIMP (args)) | |
3500 | { | |
3501 | SCM_ASSERT (SCM_CONSP (args), args, SCM_ARG2, "apply"); | |
3502 | arg1 = SCM_SUBRF (proc) (arg1, SCM_CAR (args)); | |
3503 | args = SCM_CDR (args); | |
3504 | } | |
3505 | RETURN (arg1); | |
3506 | case scm_tc7_rpsubr: | |
3507 | if (SCM_NULLP (args)) | |
3508 | RETURN (SCM_BOOL_T); | |
3509 | while (SCM_NIMP (args)) | |
3510 | { | |
3511 | SCM_ASSERT (SCM_CONSP (args), args, SCM_ARG2, "apply"); | |
3512 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg1, SCM_CAR (args)))) | |
3513 | RETURN (SCM_BOOL_F); | |
3514 | arg1 = SCM_CAR (args); | |
3515 | args = SCM_CDR (args); | |
3516 | } | |
3517 | RETURN (SCM_BOOL_T); | |
3518 | case scm_tcs_closures: | |
3519 | #ifdef DEVAL | |
6dbd0af5 | 3520 | arg1 = (SCM_UNBNDP (arg1) ? SCM_EOL : debug.vect[0].a.args); |
0f2d19dd JB |
3521 | #else |
3522 | arg1 = (SCM_UNBNDP (arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
3523 | #endif | |
cf7c17e9 | 3524 | #ifndef SCM_RECKLESS |
0f2d19dd JB |
3525 | if (scm_badargsp (SCM_CAR (SCM_CODE (proc)), arg1)) |
3526 | goto wrongnumargs; | |
3527 | #endif | |
1609038c MD |
3528 | |
3529 | /* Copy argument list */ | |
3530 | if (SCM_IMP (arg1)) | |
3531 | args = arg1; | |
3532 | else | |
3533 | { | |
3534 | SCM tl = args = scm_cons (SCM_CAR (arg1), SCM_UNSPECIFIED); | |
3535 | while (SCM_NIMP (arg1 = SCM_CDR (arg1)) | |
3536 | && SCM_CONSP (arg1)) | |
3537 | { | |
3538 | SCM_SETCDR (tl, scm_cons (SCM_CAR (arg1), | |
3539 | SCM_UNSPECIFIED)); | |
3540 | tl = SCM_CDR (tl); | |
3541 | } | |
3542 | SCM_SETCDR (tl, arg1); | |
3543 | } | |
3544 | ||
3545 | args = EXTEND_ENV (SCM_CAR (SCM_CODE (proc)), args, SCM_ENV (proc)); | |
2ddb0920 MD |
3546 | proc = SCM_CDR (SCM_CODE (proc)); |
3547 | do | |
3548 | { | |
3549 | if (SCM_IMP (SCM_CAR (proc))) | |
3550 | { | |
3551 | if (SCM_ISYMP (SCM_CAR (proc))) | |
3552 | { | |
3553 | proc = scm_m_expand_body (proc, args); | |
3554 | continue; | |
3555 | } | |
3556 | arg1 = SCM_CAR (proc); | |
3557 | } | |
3558 | else | |
3559 | arg1 = SCM_CEVAL (SCM_CAR (proc), args); | |
3560 | proc = SCM_CDR (proc); | |
3561 | } | |
3562 | while (SCM_NNULLP (proc)); | |
0f2d19dd JB |
3563 | RETURN (arg1); |
3564 | case scm_tc7_contin: | |
3565 | SCM_ASRTGO (SCM_NULLP (args), wrongnumargs); | |
3566 | scm_call_continuation (proc, arg1); | |
3567 | #ifdef CCLO | |
3568 | case scm_tc7_cclo: | |
3569 | #ifdef DEVAL | |
6dbd0af5 MD |
3570 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : debug.vect[0].a.args); |
3571 | arg1 = proc; | |
3572 | proc = SCM_CCLO_SUBR (proc); | |
3573 | debug.vect[0].a.proc = proc; | |
3574 | debug.vect[0].a.args = scm_cons (arg1, args); | |
0f2d19dd JB |
3575 | #else |
3576 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
0f2d19dd JB |
3577 | arg1 = proc; |
3578 | proc = SCM_CCLO_SUBR (proc); | |
6dbd0af5 | 3579 | #endif |
0f2d19dd JB |
3580 | goto tail; |
3581 | #endif | |
89efbff4 MD |
3582 | case scm_tc7_pws: |
3583 | proc = SCM_PROCEDURE (proc); | |
3584 | #ifdef DEVAL | |
3585 | debug.vect[0].a.proc = proc; | |
3586 | #endif | |
3587 | goto tail; | |
0c32d76c | 3588 | case scm_tcs_cons_gloc: |
f3d2630a MD |
3589 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) |
3590 | { | |
3591 | #ifdef DEVAL | |
3592 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : debug.vect[0].a.args); | |
3593 | #else | |
3594 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
3595 | #endif | |
3596 | if (SCM_NULLP (args)) | |
3597 | { | |
3598 | arg1 = proc; | |
3599 | proc = SCM_ENTITY_PROC_0 (proc); | |
3600 | #ifdef DEVAL | |
3601 | debug.vect[0].a.proc = proc; | |
3602 | debug.vect[0].a.args = scm_cons (arg1, args); | |
3603 | #endif | |
3604 | goto tail; | |
3605 | } | |
3606 | proc = (SCM_NULLP (SCM_CDR (args)) | |
3607 | ? SCM_ENTITY_PROC_1 (proc) | |
3608 | : (SCM_NULLP (SCM_CDDR (args)) | |
3609 | ? SCM_ENTITY_PROC_2 (proc) | |
3610 | : SCM_ENTITY_PROC_3 (proc))); | |
3611 | RETURN (SCM_CEVAL (proc, | |
3612 | scm_acons (scm_sym_args, args, | |
3613 | scm_apply_generic_env))); | |
3614 | } | |
3615 | else if (!SCM_I_OPERATORP (proc)) | |
9b07e212 MD |
3616 | goto badproc; |
3617 | else | |
da7f71d7 MD |
3618 | { |
3619 | #ifdef DEVAL | |
3620 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : debug.vect[0].a.args); | |
3621 | #else | |
3622 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
3623 | #endif | |
3624 | arg1 = proc; | |
3625 | proc = (SCM_NULLP (args) | |
3626 | ? (SCM_I_ENTITYP (proc) | |
3627 | ? SCM_ENTITY_PROC_0 (proc) | |
3628 | : SCM_OPERATOR_PROC_0 (proc)) | |
3629 | : SCM_NULLP (SCM_CDR (args)) | |
3630 | ? (SCM_I_ENTITYP (proc) | |
3631 | ? SCM_ENTITY_PROC_1 (proc) | |
3632 | : SCM_OPERATOR_PROC_1 (proc)) | |
3633 | : SCM_NULLP (SCM_CDDR (args)) | |
3634 | ? (SCM_I_ENTITYP (proc) | |
3635 | ? SCM_ENTITY_PROC_2 (proc) | |
3636 | : SCM_OPERATOR_PROC_2 (proc)) | |
3637 | : (SCM_I_ENTITYP (proc) | |
3638 | ? SCM_ENTITY_PROC_3 (proc) | |
3639 | : SCM_OPERATOR_PROC_3 (proc))); | |
3640 | #ifdef DEVAL | |
3641 | debug.vect[0].a.proc = proc; | |
3642 | debug.vect[0].a.args = scm_cons (arg1, args); | |
3643 | #endif | |
3644 | goto tail; | |
3645 | } | |
0f2d19dd | 3646 | wrongnumargs: |
f5bf2977 | 3647 | scm_wrong_num_args (proc); |
0f2d19dd JB |
3648 | default: |
3649 | badproc: | |
3650 | scm_wta (proc, (char *) SCM_ARG1, "apply"); | |
3651 | RETURN (arg1); | |
3652 | } | |
3653 | #ifdef DEVAL | |
6dbd0af5 | 3654 | exit: |
b6d75948 | 3655 | if (CHECK_EXIT && SCM_TRAPS_P) |
b7ff98dd | 3656 | if (SCM_EXIT_FRAME_P || (SCM_TRACE_P && SCM_TRACED_FRAME_P (debug))) |
6dbd0af5 | 3657 | { |
b7ff98dd MD |
3658 | SCM_CLEAR_TRACED_FRAME (debug); |
3659 | if (SCM_CHEAPTRAPS_P) | |
c0ab1b8d | 3660 | arg1 = scm_make_debugobj (&debug); |
6dbd0af5 MD |
3661 | else |
3662 | { | |
3663 | scm_make_cont (&arg1); | |
ca6ef71a | 3664 | if (setjmp (SCM_JMPBUF (arg1))) |
6dbd0af5 MD |
3665 | { |
3666 | proc = SCM_THROW_VALUE (arg1); | |
3667 | goto ret; | |
3668 | } | |
3669 | } | |
2f0d1375 | 3670 | scm_ithrow (scm_sym_exit_frame, scm_cons2 (arg1, proc, SCM_EOL), 0); |
6dbd0af5 MD |
3671 | } |
3672 | ret: | |
1646d37b | 3673 | scm_last_debug_frame = debug.prev; |
0f2d19dd JB |
3674 | return proc; |
3675 | #endif | |
3676 | } | |
3677 | ||
6dbd0af5 MD |
3678 | |
3679 | /* SECTION: The rest of this file is only read once. | |
3680 | */ | |
3681 | ||
0f2d19dd JB |
3682 | #ifndef DEVAL |
3683 | ||
d9c393f5 JB |
3684 | /* Typechecking for multi-argument MAP and FOR-EACH. |
3685 | ||
3686 | Verify that each element of the vector ARGS, except for the first, | |
3687 | is a proper list whose length is LEN. Attribute errors to WHO, | |
3688 | and claim that the i'th element of ARGS is WHO's i+2'th argument. */ | |
3689 | static inline void | |
3690 | check_map_args (long len, SCM args, const char *who) | |
3691 | { | |
3692 | SCM *ve = SCM_VELTS (args); | |
3693 | int i; | |
3694 | ||
3695 | for (i = SCM_LENGTH (args) - 1; i >= 1; i--) | |
3696 | { | |
3697 | int elt_len = scm_ilength (ve[i]); | |
3698 | ||
3699 | if (elt_len < 0) | |
3700 | scm_wrong_type_arg (who, i + 2, ve[i]); | |
3701 | ||
3702 | if (elt_len != len) | |
3703 | scm_out_of_range (who, ve[i]); | |
3704 | } | |
3705 | ||
3706 | scm_remember (&args); | |
3707 | } | |
3708 | ||
3709 | ||
6cb702da | 3710 | SCM_PROC (s_map, "map", 2, 0, 1, scm_map); |
1cc91f1b | 3711 | |
368bf056 MD |
3712 | /* Note: Currently, scm_map applies PROC to the argument list(s) |
3713 | sequentially, starting with the first element(s). This is used in | |
3714 | evalext.c where the Scheme procedure `serial-map', which guarantees | |
3715 | sequential behaviour, is implemented using scm_map. If the | |
3716 | behaviour changes, we need to update `serial-map'. | |
3717 | */ | |
3718 | ||
0f2d19dd JB |
3719 | SCM |
3720 | scm_map (proc, arg1, args) | |
3721 | SCM proc; | |
3722 | SCM arg1; | |
3723 | SCM args; | |
0f2d19dd | 3724 | { |
d9c393f5 | 3725 | long i, len; |
0f2d19dd JB |
3726 | SCM res = SCM_EOL; |
3727 | SCM *pres = &res; | |
3728 | SCM *ve = &args; /* Keep args from being optimized away. */ | |
3729 | ||
3730 | if (SCM_NULLP (arg1)) | |
3731 | return res; | |
d9c393f5 JB |
3732 | len = scm_ilength (arg1); |
3733 | SCM_ASSERT (len >= 0, arg1, SCM_ARG2, s_map); | |
0f2d19dd JB |
3734 | if (SCM_NULLP (args)) |
3735 | { | |
3736 | while (SCM_NIMP (arg1)) | |
3737 | { | |
3738 | SCM_ASSERT (SCM_CONSP (arg1), arg1, SCM_ARG2, s_map); | |
3739 | *pres = scm_cons (scm_apply (proc, SCM_CAR (arg1), scm_listofnull), SCM_EOL); | |
a23afe53 | 3740 | pres = SCM_CDRLOC (*pres); |
0f2d19dd JB |
3741 | arg1 = SCM_CDR (arg1); |
3742 | } | |
3743 | return res; | |
3744 | } | |
3745 | args = scm_vector (scm_cons (arg1, args)); | |
3746 | ve = SCM_VELTS (args); | |
cf7c17e9 | 3747 | #ifndef SCM_RECKLESS |
d9c393f5 | 3748 | check_map_args (len, args, s_map); |
0f2d19dd JB |
3749 | #endif |
3750 | while (1) | |
3751 | { | |
3752 | arg1 = SCM_EOL; | |
3753 | for (i = SCM_LENGTH (args) - 1; i >= 0; i--) | |
3754 | { | |
d9c393f5 JB |
3755 | if (SCM_IMP (ve[i])) |
3756 | return res; | |
0f2d19dd JB |
3757 | arg1 = scm_cons (SCM_CAR (ve[i]), arg1); |
3758 | ve[i] = SCM_CDR (ve[i]); | |
3759 | } | |
3760 | *pres = scm_cons (scm_apply (proc, arg1, SCM_EOL), SCM_EOL); | |
a23afe53 | 3761 | pres = SCM_CDRLOC (*pres); |
0f2d19dd JB |
3762 | } |
3763 | } | |
3764 | ||
3765 | ||
3766 | SCM_PROC(s_for_each, "for-each", 2, 0, 1, scm_for_each); | |
1cc91f1b | 3767 | |
0f2d19dd JB |
3768 | SCM |
3769 | scm_for_each (proc, arg1, args) | |
3770 | SCM proc; | |
3771 | SCM arg1; | |
3772 | SCM args; | |
0f2d19dd JB |
3773 | { |
3774 | SCM *ve = &args; /* Keep args from being optimized away. */ | |
d9c393f5 | 3775 | long i, len; |
0f2d19dd JB |
3776 | if SCM_NULLP (arg1) |
3777 | return SCM_UNSPECIFIED; | |
d9c393f5 JB |
3778 | len = scm_ilength (arg1); |
3779 | SCM_ASSERT (len >= 0, arg1, SCM_ARG2, s_for_each); | |
0f2d19dd JB |
3780 | if SCM_NULLP (args) |
3781 | { | |
3782 | while SCM_NIMP (arg1) | |
3783 | { | |
3784 | SCM_ASSERT (SCM_CONSP (arg1), arg1, SCM_ARG2, s_for_each); | |
3785 | scm_apply (proc, SCM_CAR (arg1), scm_listofnull); | |
3786 | arg1 = SCM_CDR (arg1); | |
3787 | } | |
3788 | return SCM_UNSPECIFIED; | |
3789 | } | |
3790 | args = scm_vector (scm_cons (arg1, args)); | |
3791 | ve = SCM_VELTS (args); | |
cf7c17e9 | 3792 | #ifndef SCM_RECKLESS |
d9c393f5 | 3793 | check_map_args (len, args, s_for_each); |
0f2d19dd JB |
3794 | #endif |
3795 | while (1) | |
3796 | { | |
3797 | arg1 = SCM_EOL; | |
3798 | for (i = SCM_LENGTH (args) - 1; i >= 0; i--) | |
3799 | { | |
3800 | if SCM_IMP | |
3801 | (ve[i]) return SCM_UNSPECIFIED; | |
3802 | arg1 = scm_cons (SCM_CAR (ve[i]), arg1); | |
3803 | ve[i] = SCM_CDR (ve[i]); | |
3804 | } | |
3805 | scm_apply (proc, arg1, SCM_EOL); | |
3806 | } | |
3807 | } | |
3808 | ||
3809 | ||
1cc91f1b | 3810 | |
0f2d19dd JB |
3811 | SCM |
3812 | scm_closure (code, env) | |
3813 | SCM code; | |
3814 | SCM env; | |
0f2d19dd JB |
3815 | { |
3816 | register SCM z; | |
3817 | SCM_NEWCELL (z); | |
3818 | SCM_SETCODE (z, code); | |
a23afe53 | 3819 | SCM_SETENV (z, env); |
0f2d19dd JB |
3820 | return z; |
3821 | } | |
3822 | ||
3823 | ||
3824 | long scm_tc16_promise; | |
1cc91f1b | 3825 | |
0f2d19dd JB |
3826 | SCM |
3827 | scm_makprom (code) | |
3828 | SCM code; | |
0f2d19dd | 3829 | { |
23a62151 | 3830 | SCM_RETURN_NEWSMOB (scm_tc16_promise, code); |
0f2d19dd JB |
3831 | } |
3832 | ||
3833 | ||
1cc91f1b JB |
3834 | |
3835 | static int prinprom SCM_P ((SCM exp, SCM port, scm_print_state *pstate)); | |
3836 | ||
0f2d19dd | 3837 | static int |
19402679 | 3838 | prinprom (exp, port, pstate) |
0f2d19dd JB |
3839 | SCM exp; |
3840 | SCM port; | |
19402679 | 3841 | scm_print_state *pstate; |
0f2d19dd | 3842 | { |
19402679 | 3843 | int writingp = SCM_WRITINGP (pstate); |
b7f3516f | 3844 | scm_puts ("#<promise ", port); |
19402679 MD |
3845 | SCM_SET_WRITINGP (pstate, 1); |
3846 | scm_iprin1 (SCM_CDR (exp), port, pstate); | |
3847 | SCM_SET_WRITINGP (pstate, writingp); | |
b7f3516f | 3848 | scm_putc ('>', port); |
0f2d19dd JB |
3849 | return !0; |
3850 | } | |
3851 | ||
3852 | ||
0f2d19dd | 3853 | SCM_PROC(s_force, "force", 1, 0, 0, scm_force); |
1cc91f1b | 3854 | |
0f2d19dd JB |
3855 | SCM |
3856 | scm_force (x) | |
3857 | SCM x; | |
0f2d19dd | 3858 | { |
eed6e03e JB |
3859 | SCM_ASSERT (SCM_NIMP(x) && SCM_TYP16 (x) == scm_tc16_promise, |
3860 | x, SCM_ARG1, s_force); | |
0f2d19dd JB |
3861 | if (!((1L << 16) & SCM_CAR (x))) |
3862 | { | |
3863 | SCM ans = scm_apply (SCM_CDR (x), SCM_EOL, SCM_EOL); | |
3864 | if (!((1L << 16) & SCM_CAR (x))) | |
3865 | { | |
3866 | SCM_DEFER_INTS; | |
a23afe53 MD |
3867 | SCM_SETCDR (x, ans); |
3868 | SCM_SETOR_CAR (x, (1L << 16)); | |
0f2d19dd JB |
3869 | SCM_ALLOW_INTS; |
3870 | } | |
3871 | } | |
3872 | return SCM_CDR (x); | |
3873 | } | |
3874 | ||
3875 | SCM_PROC (s_promise_p, "promise?", 1, 0, 0, scm_promise_p); | |
1cc91f1b | 3876 | |
0f2d19dd JB |
3877 | SCM |
3878 | scm_promise_p (x) | |
3879 | SCM x; | |
0f2d19dd JB |
3880 | { |
3881 | return ((SCM_NIMP (x) && (SCM_TYP16 (x) == scm_tc16_promise)) | |
3882 | ? SCM_BOOL_T | |
3883 | : SCM_BOOL_F); | |
3884 | } | |
3885 | ||
26d5b9b4 MD |
3886 | SCM_PROC (s_cons_source, "cons-source", 3, 0, 0, scm_cons_source); |
3887 | ||
3888 | SCM | |
3889 | scm_cons_source (SCM xorig, SCM x, SCM y) | |
3890 | { | |
3891 | SCM p, z; | |
3892 | SCM_NEWCELL (z); | |
3893 | SCM_SETCAR (z, x); | |
3894 | SCM_SETCDR (z, y); | |
3895 | /* Copy source properties possibly associated with xorig. */ | |
3896 | p = scm_whash_lookup (scm_source_whash, xorig); | |
3897 | if (SCM_NIMP (p)) | |
3898 | scm_whash_insert (scm_source_whash, z, p); | |
3899 | return z; | |
3900 | } | |
3901 | ||
3902 | SCM_PROC (s_copy_tree, "copy-tree", 1, 0, 0, scm_copy_tree); | |
1cc91f1b | 3903 | |
0f2d19dd JB |
3904 | SCM |
3905 | scm_copy_tree (obj) | |
3906 | SCM obj; | |
0f2d19dd JB |
3907 | { |
3908 | SCM ans, tl; | |
26d5b9b4 | 3909 | if (SCM_IMP (obj)) |
ff467021 | 3910 | return obj; |
3910272e MD |
3911 | if (SCM_VECTORP (obj)) |
3912 | { | |
3913 | scm_sizet i = SCM_LENGTH (obj); | |
3914 | ans = scm_make_vector (SCM_MAKINUM (i), SCM_UNSPECIFIED); | |
3915 | while (i--) | |
3916 | SCM_VELTS (ans)[i] = scm_copy_tree (SCM_VELTS (obj)[i]); | |
3917 | return ans; | |
3918 | } | |
ff467021 | 3919 | if (SCM_NCONSP (obj)) |
0f2d19dd JB |
3920 | return obj; |
3921 | /* return scm_cons(scm_copy_tree(SCM_CAR(obj)), scm_copy_tree(SCM_CDR(obj))); */ | |
26d5b9b4 MD |
3922 | ans = tl = scm_cons_source (obj, |
3923 | scm_copy_tree (SCM_CAR (obj)), | |
3924 | SCM_UNSPECIFIED); | |
0f2d19dd | 3925 | while (SCM_NIMP (obj = SCM_CDR (obj)) && SCM_CONSP (obj)) |
a23afe53 MD |
3926 | { |
3927 | SCM_SETCDR (tl, scm_cons (scm_copy_tree (SCM_CAR (obj)), | |
3928 | SCM_UNSPECIFIED)); | |
3929 | tl = SCM_CDR (tl); | |
3930 | } | |
3931 | SCM_SETCDR (tl, obj); | |
0f2d19dd JB |
3932 | return ans; |
3933 | } | |
3934 | ||
1cc91f1b | 3935 | |
0f2d19dd JB |
3936 | SCM |
3937 | scm_eval_3 (obj, copyp, env) | |
3938 | SCM obj; | |
3939 | int copyp; | |
3940 | SCM env; | |
0f2d19dd JB |
3941 | { |
3942 | if (SCM_NIMP (SCM_CDR (scm_system_transformer))) | |
3943 | obj = scm_apply (SCM_CDR (scm_system_transformer), obj, scm_listofnull); | |
3944 | else if (copyp) | |
3945 | obj = scm_copy_tree (obj); | |
6cb702da | 3946 | return SCM_XEVAL (obj, env); |
0f2d19dd JB |
3947 | } |
3948 | ||
0f2d19dd | 3949 | SCM_PROC(s_eval2, "eval2", 2, 0, 0, scm_eval2); |
1cc91f1b | 3950 | |
0f2d19dd JB |
3951 | SCM |
3952 | scm_eval2 (obj, env_thunk) | |
3953 | SCM obj; | |
3954 | SCM env_thunk; | |
0f2d19dd | 3955 | { |
6bcb0868 | 3956 | return scm_eval_3 (obj, 1, scm_top_level_env (env_thunk)); |
0f2d19dd JB |
3957 | } |
3958 | ||
3959 | SCM_PROC(s_eval, "eval", 1, 0, 0, scm_eval); | |
1cc91f1b | 3960 | |
0f2d19dd JB |
3961 | SCM |
3962 | scm_eval (obj) | |
3963 | SCM obj; | |
0f2d19dd | 3964 | { |
6bcb0868 MD |
3965 | return scm_eval_3 (obj, |
3966 | 1, | |
3967 | scm_top_level_env | |
3968 | (SCM_CDR (scm_top_level_lookup_closure_var))); | |
0f2d19dd JB |
3969 | } |
3970 | ||
11f77bfc | 3971 | /* SCM_PROC(s_eval_x, "eval!", 1, 0, 0, scm_eval_x); */ |
1cc91f1b | 3972 | |
0f2d19dd JB |
3973 | SCM |
3974 | scm_eval_x (obj) | |
3975 | SCM obj; | |
0f2d19dd | 3976 | { |
6bcb0868 MD |
3977 | return scm_eval_3 (obj, |
3978 | 0, | |
3979 | scm_top_level_env | |
3980 | (SCM_CDR (scm_top_level_lookup_closure_var))); | |
0f2d19dd JB |
3981 | } |
3982 | ||
3eeba8d4 | 3983 | static const scm_smobfuns promsmob = {scm_markcdr, scm_free0, prinprom}; |
0f2d19dd | 3984 | |
6dbd0af5 MD |
3985 | |
3986 | /* At this point, scm_deval and scm_dapply are generated. | |
3987 | */ | |
3988 | ||
0f2d19dd | 3989 | #ifdef DEBUG_EXTENSIONS |
6dbd0af5 MD |
3990 | # define DEVAL |
3991 | # include "eval.c" | |
0f2d19dd JB |
3992 | #endif |
3993 | ||
3994 | ||
1cc91f1b | 3995 | |
0f2d19dd JB |
3996 | void |
3997 | scm_init_eval () | |
0f2d19dd | 3998 | { |
33b97402 MD |
3999 | scm_init_opts (scm_evaluator_traps, |
4000 | scm_evaluator_trap_table, | |
4001 | SCM_N_EVALUATOR_TRAPS); | |
4002 | scm_init_opts (scm_eval_options_interface, | |
4003 | scm_eval_opts, | |
4004 | SCM_N_EVAL_OPTIONS); | |
4005 | ||
0f2d19dd | 4006 | scm_tc16_promise = scm_newsmob (&promsmob); |
b8229a3b | 4007 | |
2f0d1375 | 4008 | scm_sym_apply = scm_make_subr ("apply", scm_tc7_lsubr_2, scm_apply); |
0f2d19dd | 4009 | scm_system_transformer = scm_sysintern ("scm:eval-transformer", SCM_UNDEFINED); |
2f0d1375 MD |
4010 | scm_sym_dot = SCM_CAR (scm_sysintern (".", SCM_UNDEFINED)); |
4011 | scm_sym_arrow = SCM_CAR (scm_sysintern ("=>", SCM_UNDEFINED)); | |
4012 | scm_sym_else = SCM_CAR (scm_sysintern ("else", SCM_UNDEFINED)); | |
4013 | scm_sym_unquote = SCM_CAR (scm_sysintern ("unquote", SCM_UNDEFINED)); | |
4014 | scm_sym_uq_splicing = SCM_CAR (scm_sysintern ("unquote-splicing", SCM_UNDEFINED)); | |
0f2d19dd | 4015 | |
73b64342 MD |
4016 | scm_nil = scm_sysintern ("nil", SCM_UNDEFINED); |
4017 | SCM_SETCDR (scm_nil, SCM_CAR (scm_nil)); | |
4018 | scm_nil = SCM_CAR (scm_nil); | |
4019 | scm_t = scm_sysintern ("t", SCM_UNDEFINED); | |
4020 | SCM_SETCDR (scm_t, SCM_CAR (scm_t)); | |
4021 | scm_t = SCM_CAR (scm_t); | |
73b64342 | 4022 | |
0f2d19dd | 4023 | /* acros */ |
0f2d19dd JB |
4024 | /* end of acros */ |
4025 | ||
dc19d1d2 JB |
4026 | scm_top_level_lookup_closure_var = |
4027 | scm_sysintern("*top-level-lookup-closure*", SCM_BOOL_F); | |
9b8d3288 | 4028 | scm_can_use_top_level_lookup_closure_var = 1; |
0f2d19dd | 4029 | |
6dbd0af5 | 4030 | #ifdef DEBUG_EXTENSIONS |
2f0d1375 MD |
4031 | scm_sym_enter_frame = SCM_CAR (scm_sysintern ("enter-frame", SCM_UNDEFINED)); |
4032 | scm_sym_apply_frame = SCM_CAR (scm_sysintern ("apply-frame", SCM_UNDEFINED)); | |
4033 | scm_sym_exit_frame = SCM_CAR (scm_sysintern ("exit-frame", SCM_UNDEFINED)); | |
4034 | scm_sym_trace = SCM_CAR (scm_sysintern ("trace", SCM_UNDEFINED)); | |
6dbd0af5 MD |
4035 | #endif |
4036 | ||
0f2d19dd | 4037 | #include "eval.x" |
25eaf21a MD |
4038 | |
4039 | scm_add_feature ("delay"); | |
0f2d19dd | 4040 | } |
0f2d19dd | 4041 | |
6dbd0af5 | 4042 | #endif /* !DEVAL */ |