Commit | Line | Data |
---|---|---|
22a52da1 | 1 | /* Copyright (C) 1995,1996,1997,1998,1999,2000,2001 Free Software Foundation, Inc. |
0f2d19dd JB |
2 | * |
3 | * This program is free software; you can redistribute it and/or modify | |
4 | * it under the terms of the GNU General Public License as published by | |
5 | * the Free Software Foundation; either version 2, or (at your option) | |
6 | * any later version. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this software; see the file COPYING. If not, write to | |
82892bed JB |
15 | * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, |
16 | * Boston, MA 02111-1307 USA | |
0f2d19dd JB |
17 | * |
18 | * As a special exception, the Free Software Foundation gives permission | |
19 | * for additional uses of the text contained in its release of GUILE. | |
20 | * | |
21 | * The exception is that, if you link the GUILE library with other files | |
22 | * to produce an executable, this does not by itself cause the | |
23 | * resulting executable to be covered by the GNU General Public License. | |
24 | * Your use of that executable is in no way restricted on account of | |
25 | * linking the GUILE library code into it. | |
26 | * | |
27 | * This exception does not however invalidate any other reasons why | |
28 | * the executable file might be covered by the GNU General Public License. | |
29 | * | |
30 | * This exception applies only to the code released by the | |
31 | * Free Software Foundation under the name GUILE. If you copy | |
32 | * code from other Free Software Foundation releases into a copy of | |
33 | * GUILE, as the General Public License permits, the exception does | |
34 | * not apply to the code that you add in this way. To avoid misleading | |
35 | * anyone as to the status of such modified files, you must delete | |
36 | * this exception notice from them. | |
37 | * | |
38 | * If you write modifications of your own for GUILE, it is your choice | |
39 | * whether to permit this exception to apply to your modifications. | |
82892bed | 40 | * If you do not wish that, delete this exception notice. */ |
1bbd0b84 | 41 | |
0f2d19dd JB |
42 | \f |
43 | ||
6dbd0af5 MD |
44 | /* This file is read twice in order to produce debugging versions of |
45 | * scm_ceval and scm_apply. These functions, scm_deval and | |
46 | * scm_dapply, are produced when we define the preprocessor macro | |
47 | * DEVAL. The file is divided into sections which are treated | |
48 | * differently with respect to DEVAL. The heads of these sections are | |
49 | * marked with the string "SECTION:". | |
50 | */ | |
51 | ||
6dbd0af5 | 52 | /* SECTION: This code is compiled once. |
0f2d19dd JB |
53 | */ |
54 | ||
55 | #ifndef DEVAL | |
56 | ||
d16332b3 | 57 | /* We need this to get the definitions for HAVE_ALLOCA_H, etc. */ |
a0599745 | 58 | #include "libguile/scmconfig.h" |
d16332b3 | 59 | |
48b96f4b JB |
60 | /* AIX requires this to be the first thing in the file. The #pragma |
61 | directive is indented so pre-ANSI compilers will ignore it, rather | |
62 | than choke on it. */ | |
5862b540 | 63 | #ifndef __GNUC__ |
48b96f4b JB |
64 | # if HAVE_ALLOCA_H |
65 | # include <alloca.h> | |
66 | # else | |
67 | # ifdef _AIX | |
ac13d9d2 | 68 | # pragma alloca |
48b96f4b JB |
69 | # else |
70 | # ifndef alloca /* predefined by HP cc +Olibcalls */ | |
71 | char *alloca (); | |
72 | # endif | |
73 | # endif | |
74 | # endif | |
75 | #endif | |
76 | ||
a0599745 MD |
77 | #include "libguile/_scm.h" |
78 | #include "libguile/debug.h" | |
09074dbf | 79 | #include "libguile/dynwind.h" |
a0599745 MD |
80 | #include "libguile/alist.h" |
81 | #include "libguile/eq.h" | |
82 | #include "libguile/continuations.h" | |
83 | #include "libguile/throw.h" | |
84 | #include "libguile/smob.h" | |
85 | #include "libguile/macros.h" | |
86 | #include "libguile/procprop.h" | |
87 | #include "libguile/hashtab.h" | |
88 | #include "libguile/hash.h" | |
89 | #include "libguile/srcprop.h" | |
90 | #include "libguile/stackchk.h" | |
91 | #include "libguile/objects.h" | |
92 | #include "libguile/async.h" | |
93 | #include "libguile/feature.h" | |
94 | #include "libguile/modules.h" | |
95 | #include "libguile/ports.h" | |
96 | #include "libguile/root.h" | |
97 | #include "libguile/vectors.h" | |
549e6ec6 | 98 | #include "libguile/fluids.h" |
a513ead3 | 99 | #include "libguile/values.h" |
a0599745 MD |
100 | |
101 | #include "libguile/validate.h" | |
102 | #include "libguile/eval.h" | |
89efbff4 | 103 | |
0f2d19dd JB |
104 | \f |
105 | ||
17fa3fcf DH |
106 | #define SCM_VALIDATE_NON_EMPTY_COMBINATION(x) \ |
107 | do { \ | |
108 | if (SCM_EQ_P ((x), SCM_EOL)) \ | |
109 | scm_misc_error (NULL, scm_s_expression, SCM_EOL); \ | |
110 | } while (0) | |
111 | ||
112 | \f | |
113 | ||
6dbd0af5 MD |
114 | /* The evaluator contains a plethora of EVAL symbols. |
115 | * This is an attempt at explanation. | |
116 | * | |
117 | * The following macros should be used in code which is read twice | |
118 | * (where the choice of evaluator is hard soldered): | |
119 | * | |
120 | * SCM_CEVAL is the symbol used within one evaluator to call itself. | |
121 | * Originally, it is defined to scm_ceval, but is redefined to | |
122 | * scm_deval during the second pass. | |
123 | * | |
124 | * SIDEVAL corresponds to SCM_CEVAL, but is used in situations where | |
125 | * only side effects of expressions matter. All immediates are | |
126 | * ignored. | |
127 | * | |
6cb702da | 128 | * SCM_EVALIM is used when it is known that the expression is an |
6dbd0af5 MD |
129 | * immediate. (This macro never calls an evaluator.) |
130 | * | |
131 | * EVALCAR evaluates the car of an expression. | |
132 | * | |
133 | * EVALCELLCAR is like EVALCAR, but is used when it is known that the | |
134 | * car is a lisp cell. | |
135 | * | |
136 | * The following macros should be used in code which is read once | |
137 | * (where the choice of evaluator is dynamic): | |
138 | * | |
6cb702da | 139 | * SCM_XEVAL takes care of immediates without calling an evaluator. It |
6dbd0af5 MD |
140 | * then calls scm_ceval *or* scm_deval, depending on the debugging |
141 | * mode. | |
142 | * | |
6cb702da | 143 | * SCM_XEVALCAR corresponds to EVALCAR, but uses scm_ceval *or* scm_deval |
6dbd0af5 MD |
144 | * depending on the debugging mode. |
145 | * | |
146 | * The main motivation for keeping this plethora is efficiency | |
147 | * together with maintainability (=> locality of code). | |
148 | */ | |
149 | ||
6cb702da | 150 | #define SCM_CEVAL scm_ceval |
7d2b68a8 | 151 | #define SIDEVAL(x, env) if (SCM_NIMP (x)) SCM_CEVAL((x), (env)) |
6cb702da | 152 | |
7d2b68a8 MD |
153 | #define EVALCELLCAR(x, env) (SCM_SYMBOLP (SCM_CAR (x)) \ |
154 | ? *scm_lookupcar (x, env, 1) \ | |
155 | : SCM_CEVAL (SCM_CAR (x), env)) | |
0f2d19dd | 156 | |
8c494e99 | 157 | #define EVALCAR(x, env) (SCM_IMP (SCM_CAR (x)) \ |
904a077d MV |
158 | ? SCM_EVALIM (SCM_CAR (x), env) \ |
159 | : EVALCELLCAR (x, env)) | |
0f2d19dd | 160 | |
e2806c10 | 161 | #define EXTEND_ENV SCM_EXTEND_ENV |
0f2d19dd JB |
162 | |
163 | #ifdef MEMOIZE_LOCALS | |
1cc91f1b | 164 | |
0f2d19dd | 165 | SCM * |
6e8d25a6 | 166 | scm_ilookup (SCM iloc, SCM env) |
0f2d19dd | 167 | { |
c014a02e | 168 | register long ir = SCM_IFRAME (iloc); |
0f2d19dd JB |
169 | register SCM er = env; |
170 | for (; 0 != ir; --ir) | |
171 | er = SCM_CDR (er); | |
172 | er = SCM_CAR (er); | |
173 | for (ir = SCM_IDIST (iloc); 0 != ir; --ir) | |
174 | er = SCM_CDR (er); | |
175 | if (SCM_ICDRP (iloc)) | |
a23afe53 MD |
176 | return SCM_CDRLOC (er); |
177 | return SCM_CARLOC (SCM_CDR (er)); | |
0f2d19dd JB |
178 | } |
179 | #endif | |
180 | ||
f8769b1d MV |
181 | #ifdef USE_THREADS |
182 | ||
183 | /* The Lookup Car Race | |
184 | - by Eva Luator | |
185 | ||
186 | Memoization of variables and special forms is done while executing | |
187 | the code for the first time. As long as there is only one thread | |
188 | everything is fine, but as soon as two threads execute the same | |
189 | code concurrently `for the first time' they can come into conflict. | |
190 | ||
191 | This memoization includes rewriting variable references into more | |
192 | efficient forms and expanding macros. Furthermore, macro expansion | |
193 | includes `compiling' special forms like `let', `cond', etc. into | |
194 | tree-code instructions. | |
195 | ||
196 | There shouldn't normally be a problem with memoizing local and | |
904a077d | 197 | global variable references (into ilocs and variables), because all |
f8769b1d MV |
198 | threads will mutate the code in *exactly* the same way and (if I |
199 | read the C code correctly) it is not possible to observe a half-way | |
200 | mutated cons cell. The lookup procedure can handle this | |
201 | transparently without any critical sections. | |
202 | ||
203 | It is different with macro expansion, because macro expansion | |
204 | happens outside of the lookup procedure and can't be | |
904a077d MV |
205 | undone. Therefore the lookup procedure can't cope with it. It has |
206 | to indicate failure when it detects a lost race and hope that the | |
207 | caller can handle it. Luckily, it turns out that this is the case. | |
f8769b1d | 208 | |
904a077d | 209 | An example to illustrate this: Suppose that the following form will |
f8769b1d MV |
210 | be memoized concurrently by two threads |
211 | ||
212 | (let ((x 12)) x) | |
213 | ||
214 | Let's first examine the lookup of X in the body. The first thread | |
215 | decides that it has to find the symbol "x" in the environment and | |
216 | starts to scan it. Then the other thread takes over and actually | |
217 | overtakes the first. It looks up "x" and substitutes an | |
218 | appropriate iloc for it. Now the first thread continues and | |
219 | completes its lookup. It comes to exactly the same conclusions as | |
220 | the second one and could - without much ado - just overwrite the | |
221 | iloc with the same iloc. | |
222 | ||
223 | But let's see what will happen when the race occurs while looking | |
224 | up the symbol "let" at the start of the form. It could happen that | |
225 | the second thread interrupts the lookup of the first thread and not | |
904a077d MV |
226 | only substitutes a variable for it but goes right ahead and |
227 | replaces it with the compiled form (#@let* (x 12) x). Now, when | |
228 | the first thread completes its lookup, it would replace the #@let* | |
229 | with a variable containing the "let" binding, effectively reverting | |
230 | the form to (let (x 12) x). This is wrong. It has to detect that | |
231 | it has lost the race and the evaluator has to reconsider the | |
232 | changed form completely. | |
f8769b1d MV |
233 | |
234 | This race condition could be resolved with some kind of traffic | |
235 | light (like mutexes) around scm_lookupcar, but I think that it is | |
236 | best to avoid them in this case. They would serialize memoization | |
237 | completely and because lookup involves calling arbitrary Scheme | |
238 | code (via the lookup-thunk), threads could be blocked for an | |
239 | arbitrary amount of time or even deadlock. But with the current | |
240 | solution a lot of unnecessary work is potentially done. */ | |
241 | ||
242 | /* SCM_LOOKUPCAR1 is was SCM_LOOKUPCAR used to be but is allowed to | |
243 | return NULL to indicate a failed lookup due to some race conditions | |
244 | between threads. This only happens when VLOC is the first cell of | |
245 | a special form that will eventually be memoized (like `let', etc.) | |
246 | In that case the whole lookup is bogus and the caller has to | |
247 | reconsider the complete special form. | |
248 | ||
249 | SCM_LOOKUPCAR is still there, of course. It just calls | |
250 | SCM_LOOKUPCAR1 and aborts on recieving NULL. So SCM_LOOKUPCAR | |
251 | should only be called when it is known that VLOC is not the first | |
252 | pair of a special form. Otherwise, use SCM_LOOKUPCAR1 and check | |
26d5b9b4 MD |
253 | for NULL. I think I've found the only places where this |
254 | applies. */ | |
f8769b1d MV |
255 | |
256 | #endif /* USE_THREADS */ | |
1cc91f1b | 257 | |
f25f761d GH |
258 | SCM_SYMBOL (scm_unbound_variable_key, "unbound-variable"); |
259 | ||
d0b7bad7 | 260 | #ifdef USE_THREADS |
8ecf1f13 | 261 | static SCM * |
26d5b9b4 | 262 | scm_lookupcar1 (SCM vloc, SCM genv, int check) |
d0b7bad7 MD |
263 | #else |
264 | SCM * | |
26d5b9b4 | 265 | scm_lookupcar (SCM vloc, SCM genv, int check) |
d0b7bad7 | 266 | #endif |
0f2d19dd JB |
267 | { |
268 | SCM env = genv; | |
e3173f93 | 269 | register SCM *al, fl, var = SCM_CAR (vloc); |
0f2d19dd JB |
270 | #ifdef MEMOIZE_LOCALS |
271 | register SCM iloc = SCM_ILOC00; | |
272 | #endif | |
273 | for (; SCM_NIMP (env); env = SCM_CDR (env)) | |
274 | { | |
790071cd | 275 | if (!SCM_CONSP (SCM_CAR (env))) |
0f2d19dd | 276 | break; |
a23afe53 | 277 | al = SCM_CARLOC (env); |
0f2d19dd JB |
278 | for (fl = SCM_CAR (*al); SCM_NIMP (fl); fl = SCM_CDR (fl)) |
279 | { | |
01f11e02 | 280 | if (!SCM_CONSP (fl)) |
33b97402 | 281 | { |
cf498326 | 282 | if (SCM_EQ_P (fl, var)) |
0f2d19dd JB |
283 | { |
284 | #ifdef MEMOIZE_LOCALS | |
f8769b1d | 285 | #ifdef USE_THREADS |
cf498326 | 286 | if (! SCM_EQ_P (SCM_CAR (vloc), var)) |
f8769b1d MV |
287 | goto race; |
288 | #endif | |
3201d763 | 289 | SCM_SET_CELL_WORD_0 (vloc, SCM_UNPACK (iloc) + SCM_ICDR); |
0f2d19dd | 290 | #endif |
a23afe53 | 291 | return SCM_CDRLOC (*al); |
0f2d19dd | 292 | } |
33b97402 MD |
293 | else |
294 | break; | |
295 | } | |
a23afe53 | 296 | al = SCM_CDRLOC (*al); |
cf498326 | 297 | if (SCM_EQ_P (SCM_CAR (fl), var)) |
0f2d19dd JB |
298 | { |
299 | #ifdef MEMOIZE_LOCALS | |
cf7c17e9 | 300 | #ifndef SCM_RECKLESS /* letrec inits to SCM_UNDEFINED */ |
0f2d19dd JB |
301 | if (SCM_UNBNDP (SCM_CAR (*al))) |
302 | { | |
303 | env = SCM_EOL; | |
304 | goto errout; | |
305 | } | |
f8769b1d MV |
306 | #endif |
307 | #ifdef USE_THREADS | |
c6772927 | 308 | if (!SCM_EQ_P (SCM_CAR (vloc), var)) |
f8769b1d | 309 | goto race; |
0f2d19dd | 310 | #endif |
a23afe53 | 311 | SCM_SETCAR (vloc, iloc); |
0f2d19dd | 312 | #endif |
a23afe53 | 313 | return SCM_CARLOC (*al); |
0f2d19dd JB |
314 | } |
315 | #ifdef MEMOIZE_LOCALS | |
3201d763 | 316 | iloc = SCM_PACK (SCM_UNPACK (iloc) + SCM_IDINC); |
0f2d19dd JB |
317 | #endif |
318 | } | |
319 | #ifdef MEMOIZE_LOCALS | |
3201d763 | 320 | iloc = SCM_PACK ((~SCM_IDSTMSK) & (SCM_UNPACK(iloc) + SCM_IFRINC)); |
0f2d19dd JB |
321 | #endif |
322 | } | |
323 | { | |
86d31dfe | 324 | SCM top_thunk, real_var; |
790071cd | 325 | if (SCM_NIMP (env)) |
0f2d19dd | 326 | { |
86d31dfe MV |
327 | top_thunk = SCM_CAR (env); /* env now refers to a |
328 | top level env thunk */ | |
0f2d19dd JB |
329 | env = SCM_CDR (env); |
330 | } | |
331 | else | |
332 | top_thunk = SCM_BOOL_F; | |
86d31dfe MV |
333 | real_var = scm_sym2var (var, top_thunk, SCM_BOOL_F); |
334 | if (SCM_FALSEP (real_var)) | |
0f2d19dd | 335 | goto errout; |
86d31dfe | 336 | |
cf7c17e9 | 337 | #ifndef SCM_RECKLESS |
01f11e02 | 338 | if (!SCM_NULLP (env) || SCM_UNBNDP (SCM_VARIABLE_REF (real_var))) |
86d31dfe MV |
339 | { |
340 | errout: | |
341 | /* scm_everr (vloc, genv,...) */ | |
342 | if (check) | |
343 | { | |
344 | if (SCM_NULLP (env)) | |
345 | scm_error (scm_unbound_variable_key, NULL, | |
346 | "Unbound variable: ~S", | |
8ea46249 | 347 | scm_list_1 (var), SCM_BOOL_F); |
86d31dfe MV |
348 | else |
349 | scm_misc_error (NULL, "Damaged environment: ~S", | |
8ea46249 | 350 | scm_list_1 (var)); |
86d31dfe MV |
351 | } |
352 | else | |
353 | { | |
354 | /* A variable could not be found, but we shall | |
355 | not throw an error. */ | |
356 | static SCM undef_object = SCM_UNDEFINED; | |
357 | return &undef_object; | |
358 | } | |
09e4d064 | 359 | } |
0f2d19dd | 360 | #endif |
86d31dfe | 361 | |
f8769b1d | 362 | #ifdef USE_THREADS |
c6772927 | 363 | if (!SCM_EQ_P (SCM_CAR (vloc), var)) |
86d31dfe MV |
364 | { |
365 | /* Some other thread has changed the very cell we are working | |
366 | on. In effect, it must have done our job or messed it up | |
367 | completely. */ | |
368 | race: | |
369 | var = SCM_CAR (vloc); | |
d22a0ea1 MV |
370 | if (SCM_VARIABLEP (var)) |
371 | return SCM_VARIABLE_LOC (var); | |
f8769b1d | 372 | #ifdef MEMOIZE_LOCALS |
86d31dfe MV |
373 | if (SCM_ITAG7 (var) == SCM_ITAG7 (SCM_ILOC00)) |
374 | return scm_ilookup (var, genv); | |
f8769b1d | 375 | #endif |
904a077d | 376 | /* We can't cope with anything else than variables and ilocs. When |
86d31dfe MV |
377 | a special form has been memoized (i.e. `let' into `#@let') we |
378 | return NULL and expect the calling function to do the right | |
379 | thing. For the evaluator, this means going back and redoing | |
380 | the dispatch on the car of the form. */ | |
381 | return NULL; | |
382 | } | |
f8769b1d MV |
383 | #endif /* USE_THREADS */ |
384 | ||
d22a0ea1 | 385 | SCM_SETCAR (vloc, real_var); |
86d31dfe MV |
386 | return SCM_VARIABLE_LOC (real_var); |
387 | } | |
0f2d19dd JB |
388 | } |
389 | ||
f8769b1d MV |
390 | #ifdef USE_THREADS |
391 | SCM * | |
6e8d25a6 | 392 | scm_lookupcar (SCM vloc, SCM genv, int check) |
f8769b1d | 393 | { |
26d5b9b4 | 394 | SCM *loc = scm_lookupcar1 (vloc, genv, check); |
f8769b1d MV |
395 | if (loc == NULL) |
396 | abort (); | |
397 | return loc; | |
398 | } | |
f8769b1d MV |
399 | #endif |
400 | ||
0f2d19dd | 401 | #define unmemocar scm_unmemocar |
1cc91f1b | 402 | |
86d31dfe MV |
403 | SCM_SYMBOL (sym_three_question_marks, "???"); |
404 | ||
0f2d19dd | 405 | SCM |
6e8d25a6 | 406 | scm_unmemocar (SCM form, SCM env) |
0f2d19dd | 407 | { |
0f2d19dd JB |
408 | SCM c; |
409 | ||
410 | if (SCM_IMP (form)) | |
411 | return form; | |
412 | c = SCM_CAR (form); | |
904a077d | 413 | if (SCM_VARIABLEP (c)) |
d22a0ea1 | 414 | { |
8c494e99 | 415 | SCM sym = scm_module_reverse_lookup (scm_env_module (env), c); |
d22a0ea1 MV |
416 | if (SCM_EQ_P (sym, SCM_BOOL_F)) |
417 | sym = sym_three_question_marks; | |
418 | SCM_SETCAR (form, sym); | |
419 | } | |
0f2d19dd | 420 | #ifdef MEMOIZE_LOCALS |
6dbd0af5 | 421 | #ifdef DEBUG_EXTENSIONS |
0f2d19dd JB |
422 | else if (SCM_ILOCP (c)) |
423 | { | |
c014a02e | 424 | long ir; |
b0c54567 | 425 | |
0f2d19dd JB |
426 | for (ir = SCM_IFRAME (c); ir != 0; --ir) |
427 | env = SCM_CDR (env); | |
8ea46249 | 428 | env = SCM_CAAR (env); |
0f2d19dd JB |
429 | for (ir = SCM_IDIST (c); ir != 0; --ir) |
430 | env = SCM_CDR (env); | |
a23afe53 | 431 | SCM_SETCAR (form, SCM_ICDRP (c) ? env : SCM_CAR (env)); |
0f2d19dd | 432 | } |
6dbd0af5 | 433 | #endif |
0f2d19dd JB |
434 | #endif |
435 | return form; | |
436 | } | |
437 | ||
1cc91f1b | 438 | |
0f2d19dd | 439 | SCM |
6e8d25a6 | 440 | scm_eval_car (SCM pair, SCM env) |
0f2d19dd | 441 | { |
6cb702da | 442 | return SCM_XEVALCAR (pair, env); |
0f2d19dd JB |
443 | } |
444 | ||
445 | \f | |
446 | /* | |
447 | * The following rewrite expressions and | |
448 | * some memoized forms have different syntax | |
449 | */ | |
450 | ||
3eeba8d4 JB |
451 | const char scm_s_expression[] = "missing or extra expression"; |
452 | const char scm_s_test[] = "bad test"; | |
453 | const char scm_s_body[] = "bad body"; | |
454 | const char scm_s_bindings[] = "bad bindings"; | |
185ab0ef | 455 | const char scm_s_duplicate_bindings[] = "duplicate bindings"; |
3eeba8d4 JB |
456 | const char scm_s_variable[] = "bad variable"; |
457 | const char scm_s_clauses[] = "bad or missing clauses"; | |
458 | const char scm_s_formals[] = "bad formals"; | |
5280aaca | 459 | const char scm_s_duplicate_formals[] = "duplicate formals"; |
0f2d19dd | 460 | |
85db4a2c DH |
461 | SCM_GLOBAL_SYMBOL (scm_sym_dot, "."); |
462 | SCM_GLOBAL_SYMBOL (scm_sym_arrow, "=>"); | |
463 | SCM_GLOBAL_SYMBOL (scm_sym_else, "else"); | |
464 | SCM_GLOBAL_SYMBOL (scm_sym_unquote, "unquote"); | |
465 | SCM_GLOBAL_SYMBOL (scm_sym_uq_splicing, "unquote-splicing"); | |
81123e6d MD |
466 | |
467 | SCM scm_f_apply; | |
b8229a3b | 468 | |
6dbd0af5 | 469 | #ifdef DEBUG_EXTENSIONS |
85db4a2c DH |
470 | SCM_GLOBAL_SYMBOL (scm_sym_enter_frame, "enter-frame"); |
471 | SCM_GLOBAL_SYMBOL (scm_sym_apply_frame, "apply-frame"); | |
472 | SCM_GLOBAL_SYMBOL (scm_sym_exit_frame, "exit-frame"); | |
473 | SCM_GLOBAL_SYMBOL (scm_sym_trace, "trace"); | |
6dbd0af5 | 474 | #endif |
0f2d19dd | 475 | |
0f2d19dd | 476 | |
26d5b9b4 MD |
477 | /* Check that the body denoted by XORIG is valid and rewrite it into |
478 | its internal form. The internal form of a body is just the body | |
479 | itself, but prefixed with an ISYM that denotes to what kind of | |
480 | outer construct this body belongs. A lambda body starts with | |
481 | SCM_IM_LAMBDA, for example, a body of a let starts with SCM_IM_LET, | |
482 | etc. The one exception is a body that belongs to a letrec that has | |
483 | been formed by rewriting internal defines: it starts with | |
484 | SCM_IM_DEFINE. */ | |
485 | ||
486 | /* XXX - Besides controlling the rewriting of internal defines, the | |
487 | additional ISYM could be used for improved error messages. | |
488 | This is not done yet. */ | |
489 | ||
490 | static SCM | |
6e8d25a6 | 491 | scm_m_body (SCM op, SCM xorig, const char *what) |
26d5b9b4 | 492 | { |
160bb34a | 493 | SCM_ASSYNT (scm_ilength (xorig) >= 1, scm_s_expression, what); |
26d5b9b4 MD |
494 | |
495 | /* Don't add another ISYM if one is present already. */ | |
496 | if (SCM_ISYMP (SCM_CAR (xorig))) | |
497 | return xorig; | |
498 | ||
499 | /* Retain possible doc string. */ | |
44d3cb0d | 500 | if (!SCM_CONSP (SCM_CAR (xorig))) |
26d5b9b4 | 501 | { |
8ea46249 | 502 | if (!SCM_NULLP (SCM_CDR (xorig))) |
26d5b9b4 | 503 | return scm_cons (SCM_CAR (xorig), |
8ea46249 | 504 | scm_m_body (op, SCM_CDR (xorig), what)); |
26d5b9b4 MD |
505 | return xorig; |
506 | } | |
507 | ||
ab66ae47 | 508 | return scm_cons (op, xorig); |
26d5b9b4 MD |
509 | } |
510 | ||
1cc91f1b | 511 | |
8ea46249 DH |
512 | SCM_SYNTAX (s_quote, "quote", scm_makmmacro, scm_m_quote); |
513 | SCM_GLOBAL_SYMBOL (scm_sym_quote, s_quote); | |
514 | ||
515 | SCM | |
e81d98ec | 516 | scm_m_quote (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 517 | { |
26d5b9b4 MD |
518 | SCM x = scm_copy_tree (SCM_CDR (xorig)); |
519 | ||
160bb34a | 520 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, scm_s_expression, s_quote); |
3a3111a8 | 521 | return scm_cons (SCM_IM_QUOTE, x); |
0f2d19dd JB |
522 | } |
523 | ||
524 | ||
8ea46249 DH |
525 | SCM_SYNTAX (s_begin, "begin", scm_makmmacro, scm_m_begin); |
526 | SCM_GLOBAL_SYMBOL (scm_sym_begin, s_begin); | |
1cc91f1b | 527 | |
8ea46249 | 528 | SCM |
e81d98ec | 529 | scm_m_begin (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 530 | { |
b8113bc8 | 531 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) >= 0, scm_s_expression, s_begin); |
3a3111a8 | 532 | return scm_cons (SCM_IM_BEGIN, SCM_CDR (xorig)); |
0f2d19dd JB |
533 | } |
534 | ||
1cc91f1b | 535 | |
8ea46249 DH |
536 | SCM_SYNTAX (s_if, "if", scm_makmmacro, scm_m_if); |
537 | SCM_GLOBAL_SYMBOL (scm_sym_if, s_if); | |
538 | ||
539 | SCM | |
e81d98ec | 540 | scm_m_if (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 541 | { |
c014a02e | 542 | long len = scm_ilength (SCM_CDR (xorig)); |
160bb34a | 543 | SCM_ASSYNT (len >= 2 && len <= 3, scm_s_expression, "if"); |
3a3111a8 | 544 | return scm_cons (SCM_IM_IF, SCM_CDR (xorig)); |
0f2d19dd JB |
545 | } |
546 | ||
547 | ||
89efbff4 | 548 | /* Will go into the RnRS module when Guile is factorized. |
8ea46249 | 549 | SCM_SYNTAX (scm_s_set_x,"set!", scm_makmmacro, scm_m_set_x); */ |
89efbff4 | 550 | const char scm_s_set_x[] = "set!"; |
8ea46249 | 551 | SCM_GLOBAL_SYMBOL (scm_sym_set_x, scm_s_set_x); |
1cc91f1b | 552 | |
8ea46249 | 553 | SCM |
e81d98ec | 554 | scm_m_set_x (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 555 | { |
6dbd0af5 | 556 | SCM x = SCM_CDR (xorig); |
8ea46249 | 557 | SCM_ASSYNT (scm_ilength (x) == 2, scm_s_expression, scm_s_set_x); |
160bb34a | 558 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (x)), scm_s_variable, scm_s_set_x); |
3a3111a8 | 559 | return scm_cons (SCM_IM_SET_X, x); |
0f2d19dd JB |
560 | } |
561 | ||
562 | ||
8ea46249 DH |
563 | SCM_SYNTAX (s_and, "and", scm_makmmacro, scm_m_and); |
564 | SCM_GLOBAL_SYMBOL (scm_sym_and, s_and); | |
1cc91f1b | 565 | |
8ea46249 | 566 | SCM |
e81d98ec | 567 | scm_m_and (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 568 | { |
c014a02e | 569 | long len = scm_ilength (SCM_CDR (xorig)); |
160bb34a | 570 | SCM_ASSYNT (len >= 0, scm_s_test, s_and); |
0f2d19dd | 571 | if (len >= 1) |
3a3111a8 | 572 | return scm_cons (SCM_IM_AND, SCM_CDR (xorig)); |
0f2d19dd JB |
573 | else |
574 | return SCM_BOOL_T; | |
575 | } | |
576 | ||
1cc91f1b | 577 | |
8ea46249 DH |
578 | SCM_SYNTAX (s_or, "or", scm_makmmacro, scm_m_or); |
579 | SCM_GLOBAL_SYMBOL (scm_sym_or, s_or); | |
580 | ||
581 | SCM | |
e81d98ec | 582 | scm_m_or (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 583 | { |
c014a02e | 584 | long len = scm_ilength (SCM_CDR (xorig)); |
160bb34a | 585 | SCM_ASSYNT (len >= 0, scm_s_test, s_or); |
0f2d19dd | 586 | if (len >= 1) |
3a3111a8 | 587 | return scm_cons (SCM_IM_OR, SCM_CDR (xorig)); |
0f2d19dd JB |
588 | else |
589 | return SCM_BOOL_F; | |
590 | } | |
591 | ||
592 | ||
8ea46249 DH |
593 | SCM_SYNTAX (s_case, "case", scm_makmmacro, scm_m_case); |
594 | SCM_GLOBAL_SYMBOL (scm_sym_case, s_case); | |
1cc91f1b | 595 | |
8ea46249 | 596 | SCM |
e81d98ec | 597 | scm_m_case (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 598 | { |
8ea46249 DH |
599 | SCM clauses; |
600 | SCM cdrx = SCM_CDR (xorig); | |
601 | SCM_ASSYNT (scm_ilength (cdrx) >= 2, scm_s_clauses, s_case); | |
602 | clauses = SCM_CDR (cdrx); | |
603 | while (!SCM_NULLP (clauses)) | |
0f2d19dd | 604 | { |
8ea46249 DH |
605 | SCM clause = SCM_CAR (clauses); |
606 | SCM_ASSYNT (scm_ilength (clause) >= 2, scm_s_clauses, s_case); | |
607 | SCM_ASSYNT (scm_ilength (SCM_CAR (clause)) >= 0 | |
608 | || (SCM_EQ_P (scm_sym_else, SCM_CAR (clause)) | |
609 | && SCM_NULLP (SCM_CDR (clauses))), | |
160bb34a | 610 | scm_s_clauses, s_case); |
8ea46249 | 611 | clauses = SCM_CDR (clauses); |
0f2d19dd | 612 | } |
3a3111a8 | 613 | return scm_cons (SCM_IM_CASE, cdrx); |
0f2d19dd JB |
614 | } |
615 | ||
616 | ||
8ea46249 DH |
617 | SCM_SYNTAX (s_cond, "cond", scm_makmmacro, scm_m_cond); |
618 | SCM_GLOBAL_SYMBOL (scm_sym_cond, s_cond); | |
1cc91f1b | 619 | |
8ea46249 | 620 | SCM |
e81d98ec | 621 | scm_m_cond (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 622 | { |
8ea46249 DH |
623 | SCM cdrx = SCM_CDR (xorig); |
624 | SCM clauses = cdrx; | |
625 | SCM_ASSYNT (scm_ilength (clauses) >= 1, scm_s_clauses, s_cond); | |
626 | while (!SCM_NULLP (clauses)) | |
0f2d19dd | 627 | { |
8ea46249 DH |
628 | SCM clause = SCM_CAR (clauses); |
629 | long len = scm_ilength (clause); | |
160bb34a | 630 | SCM_ASSYNT (len >= 1, scm_s_clauses, s_cond); |
8ea46249 | 631 | if (SCM_EQ_P (scm_sym_else, SCM_CAR (clause))) |
0f2d19dd | 632 | { |
8ea46249 DH |
633 | int last_clause_p = SCM_NULLP (SCM_CDR (clauses)); |
634 | SCM_ASSYNT (len >= 2 && last_clause_p, "bad ELSE clause", s_cond); | |
0f2d19dd | 635 | } |
8ea46249 DH |
636 | else if (len >= 2 && SCM_EQ_P (scm_sym_arrow, SCM_CADR (clause))) |
637 | { | |
638 | SCM_ASSYNT (len > 2, "missing recipient", s_cond); | |
639 | SCM_ASSYNT (len == 3, "bad recipient", s_cond); | |
640 | } | |
641 | clauses = SCM_CDR (clauses); | |
0f2d19dd | 642 | } |
3a3111a8 | 643 | return scm_cons (SCM_IM_COND, cdrx); |
0f2d19dd JB |
644 | } |
645 | ||
1cc91f1b | 646 | |
8ea46249 DH |
647 | SCM_SYNTAX (s_lambda, "lambda", scm_makmmacro, scm_m_lambda); |
648 | SCM_GLOBAL_SYMBOL (scm_sym_lambda, s_lambda); | |
5280aaca | 649 | |
8ea46249 DH |
650 | /* Return true if OBJ is `eq?' to one of the elements of LIST or to the |
651 | * cdr of the last cons. (Thus, LIST is not required to be a proper | |
652 | * list and OBJ can also be found in the improper ending.) */ | |
5280aaca MV |
653 | static int |
654 | scm_c_improper_memq (SCM obj, SCM list) | |
655 | { | |
656 | for (; SCM_CONSP (list); list = SCM_CDR (list)) | |
657 | { | |
658 | if (SCM_EQ_P (SCM_CAR (list), obj)) | |
c6772927 | 659 | return 1; |
5280aaca MV |
660 | } |
661 | return SCM_EQ_P (list, obj); | |
662 | } | |
663 | ||
8ea46249 | 664 | SCM |
e81d98ec | 665 | scm_m_lambda (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 666 | { |
8ea46249 DH |
667 | SCM formals; |
668 | SCM x = SCM_CDR (xorig); | |
26d5b9b4 | 669 | if (scm_ilength (x) < 2) |
8ea46249 DH |
670 | scm_misc_error (s_lambda, scm_s_formals, SCM_EOL); |
671 | ||
672 | formals = SCM_CAR (x); | |
673 | while (SCM_CONSP (formals)) | |
0f2d19dd | 674 | { |
8ea46249 DH |
675 | SCM formal = SCM_CAR (formals); |
676 | SCM_ASSYNT (SCM_SYMBOLP (formal), scm_s_formals, s_lambda); | |
677 | if (scm_c_improper_memq (formal, SCM_CDR (formals))) | |
db4b4ca6 | 678 | scm_misc_error (s_lambda, scm_s_duplicate_formals, SCM_EOL); |
8ea46249 | 679 | formals = SCM_CDR (formals); |
26d5b9b4 | 680 | } |
8ea46249 DH |
681 | if (!SCM_NULLP (formals) && !SCM_SYMBOLP (formals)) |
682 | scm_misc_error (s_lambda, scm_s_formals, SCM_EOL); | |
26d5b9b4 | 683 | |
3a3111a8 MD |
684 | return scm_cons2 (SCM_IM_LAMBDA, SCM_CAR (x), |
685 | scm_m_body (SCM_IM_LAMBDA, SCM_CDR (x), s_lambda)); | |
0f2d19dd JB |
686 | } |
687 | ||
688 | ||
8ea46249 DH |
689 | SCM_SYNTAX (s_letstar, "let*", scm_makmmacro, scm_m_letstar); |
690 | SCM_GLOBAL_SYMBOL (scm_sym_letstar, s_letstar); | |
1cc91f1b | 691 | |
8ea46249 DH |
692 | /* (let* ((v1 i1) (v2 i2) ...) body) with variables v1 .. vk and initializers |
693 | * i1 .. ik is transformed into the form (#@let* (v1 i1 v2 i2 ...) body*). */ | |
694 | SCM | |
e81d98ec | 695 | scm_m_letstar (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 696 | { |
8ea46249 DH |
697 | SCM bindings; |
698 | SCM x = SCM_CDR (xorig); | |
699 | SCM vars = SCM_EOL; | |
700 | SCM *varloc = &vars; | |
701 | SCM_ASSYNT (scm_ilength (x) >= 2, scm_s_body, s_letstar); | |
702 | bindings = SCM_CAR (x); | |
703 | SCM_ASSYNT (scm_ilength (bindings) >= 0, scm_s_bindings, s_letstar); | |
704 | while (!SCM_NULLP (bindings)) | |
0f2d19dd | 705 | { |
8ea46249 DH |
706 | SCM binding = SCM_CAR (bindings); |
707 | SCM_ASSYNT (scm_ilength (binding) == 2, scm_s_bindings, s_letstar); | |
708 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (binding)), scm_s_variable, s_letstar); | |
709 | *varloc = scm_list_2 (SCM_CAR (binding), SCM_CADR (binding)); | |
a23afe53 | 710 | varloc = SCM_CDRLOC (SCM_CDR (*varloc)); |
8ea46249 | 711 | bindings = SCM_CDR (bindings); |
0f2d19dd | 712 | } |
8ea46249 | 713 | return scm_cons2 (SCM_IM_LETSTAR, vars, |
3a3111a8 | 714 | scm_m_body (SCM_IM_LETSTAR, SCM_CDR (x), s_letstar)); |
0f2d19dd JB |
715 | } |
716 | ||
8ea46249 | 717 | |
0f2d19dd JB |
718 | /* DO gets the most radically altered syntax |
719 | (do ((<var1> <init1> <step1>) | |
720 | (<var2> <init2>) | |
721 | ... ) | |
722 | (<test> <return>) | |
723 | <body>) | |
724 | ;; becomes | |
725 | (do_mem (varn ... var2 var1) | |
726 | (<init1> <init2> ... <initn>) | |
727 | (<test> <return>) | |
728 | (<body>) | |
729 | <step1> <step2> ... <stepn>) ;; missing steps replaced by var | |
730 | */ | |
731 | ||
b8229a3b | 732 | SCM_SYNTAX(s_do, "do", scm_makmmacro, scm_m_do); |
2f0d1375 | 733 | SCM_GLOBAL_SYMBOL(scm_sym_do, s_do); |
1cc91f1b | 734 | |
0f2d19dd | 735 | SCM |
e81d98ec | 736 | scm_m_do (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 737 | { |
8ea46249 DH |
738 | SCM bindings; |
739 | SCM x = SCM_CDR (xorig); | |
740 | SCM vars = SCM_EOL; | |
741 | SCM inits = SCM_EOL; | |
742 | SCM *initloc = &inits; | |
743 | SCM steps = SCM_EOL; | |
744 | SCM *steploc = &steps; | |
745 | SCM_ASSYNT (scm_ilength (x) >= 2, scm_s_test, "do"); | |
746 | bindings = SCM_CAR (x); | |
747 | SCM_ASSYNT (scm_ilength (bindings) >= 0, scm_s_bindings, "do"); | |
748 | while (!SCM_NULLP (bindings)) | |
0f2d19dd | 749 | { |
8ea46249 DH |
750 | SCM arg1 = SCM_CAR (bindings); |
751 | long len = scm_ilength (arg1); | |
752 | SCM_ASSYNT (len == 2 || len == 3, scm_s_bindings, "do"); | |
160bb34a | 753 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (arg1)), scm_s_variable, "do"); |
0f2d19dd JB |
754 | /* vars reversed here, inits and steps reversed at evaluation */ |
755 | vars = scm_cons (SCM_CAR (arg1), vars); /* variable */ | |
756 | arg1 = SCM_CDR (arg1); | |
8ea46249 | 757 | *initloc = scm_list_1 (SCM_CAR (arg1)); /* init */ |
a23afe53 | 758 | initloc = SCM_CDRLOC (*initloc); |
0f2d19dd | 759 | arg1 = SCM_CDR (arg1); |
8ea46249 | 760 | *steploc = scm_list_1 (len == 2 ? SCM_CAR (vars) : SCM_CAR (arg1)); |
a23afe53 | 761 | steploc = SCM_CDRLOC (*steploc); |
8ea46249 | 762 | bindings = SCM_CDR (bindings); |
0f2d19dd JB |
763 | } |
764 | x = SCM_CDR (x); | |
160bb34a | 765 | SCM_ASSYNT (scm_ilength (SCM_CAR (x)) >= 1, scm_s_test, "do"); |
0f2d19dd JB |
766 | x = scm_cons2 (SCM_CAR (x), SCM_CDR (x), steps); |
767 | x = scm_cons2 (vars, inits, x); | |
3a3111a8 | 768 | return scm_cons (SCM_IM_DO, x); |
0f2d19dd JB |
769 | } |
770 | ||
6dbd0af5 MD |
771 | /* evalcar is small version of inline EVALCAR when we don't care about |
772 | * speed | |
773 | */ | |
774 | #define evalcar scm_eval_car | |
0f2d19dd | 775 | |
1cc91f1b | 776 | |
c014a02e | 777 | static SCM iqq (SCM form, SCM env, long depth); |
1cc91f1b | 778 | |
b8229a3b | 779 | SCM_SYNTAX(s_quasiquote, "quasiquote", scm_makacro, scm_m_quasiquote); |
2f0d1375 | 780 | SCM_GLOBAL_SYMBOL(scm_sym_quasiquote, s_quasiquote); |
b8229a3b MS |
781 | |
782 | SCM | |
6e8d25a6 | 783 | scm_m_quasiquote (SCM xorig, SCM env) |
b8229a3b MS |
784 | { |
785 | SCM x = SCM_CDR (xorig); | |
160bb34a | 786 | SCM_ASSYNT (scm_ilength (x) == 1, scm_s_expression, s_quasiquote); |
b8229a3b MS |
787 | return iqq (SCM_CAR (x), env, 1); |
788 | } | |
789 | ||
790 | ||
0f2d19dd | 791 | static SCM |
c014a02e | 792 | iqq (SCM form, SCM env, long depth) |
0f2d19dd JB |
793 | { |
794 | SCM tmp; | |
c014a02e | 795 | long edepth = depth; |
22a52da1 | 796 | if (SCM_IMP (form)) |
ff467021 | 797 | return form; |
0f2d19dd JB |
798 | if (SCM_VECTORP (form)) |
799 | { | |
c014a02e | 800 | long i = SCM_VECTOR_LENGTH (form); |
0f2d19dd JB |
801 | SCM *data = SCM_VELTS (form); |
802 | tmp = SCM_EOL; | |
803 | for (; --i >= 0;) | |
804 | tmp = scm_cons (data[i], tmp); | |
805 | return scm_vector (iqq (tmp, env, depth)); | |
806 | } | |
22a52da1 | 807 | if (!SCM_CONSP (form)) |
ff467021 | 808 | return form; |
0f2d19dd | 809 | tmp = SCM_CAR (form); |
cf498326 | 810 | if (SCM_EQ_P (scm_sym_quasiquote, tmp)) |
0f2d19dd JB |
811 | { |
812 | depth++; | |
813 | goto label; | |
814 | } | |
cf498326 | 815 | if (SCM_EQ_P (scm_sym_unquote, tmp)) |
0f2d19dd JB |
816 | { |
817 | --depth; | |
818 | label: | |
819 | form = SCM_CDR (form); | |
904a077d | 820 | SCM_ASSERT (SCM_CONSP (form) && SCM_NULLP (SCM_CDR (form)), |
0c95b57d | 821 | form, SCM_ARG1, s_quasiquote); |
0f2d19dd JB |
822 | if (0 == depth) |
823 | return evalcar (form, env); | |
8ea46249 | 824 | return scm_list_2 (tmp, iqq (SCM_CAR (form), env, depth)); |
0f2d19dd | 825 | } |
22a52da1 | 826 | if (SCM_CONSP (tmp) && (SCM_EQ_P (scm_sym_uq_splicing, SCM_CAR (tmp)))) |
0f2d19dd JB |
827 | { |
828 | tmp = SCM_CDR (tmp); | |
829 | if (0 == --edepth) | |
8ea46249 | 830 | return scm_append (scm_list_2 (evalcar (tmp, env), iqq (SCM_CDR (form), env, depth))); |
0f2d19dd JB |
831 | } |
832 | return scm_cons (iqq (SCM_CAR (form), env, edepth), iqq (SCM_CDR (form), env, depth)); | |
833 | } | |
834 | ||
835 | /* Here are acros which return values rather than code. */ | |
836 | ||
a570e93a MD |
837 | SCM_SYNTAX (s_delay, "delay", scm_makmmacro, scm_m_delay); |
838 | SCM_GLOBAL_SYMBOL (scm_sym_delay, s_delay); | |
1cc91f1b | 839 | |
0f2d19dd | 840 | SCM |
e81d98ec | 841 | scm_m_delay (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 842 | { |
160bb34a | 843 | SCM_ASSYNT (scm_ilength (xorig) == 2, scm_s_expression, s_delay); |
a570e93a | 844 | return scm_cons2 (SCM_IM_DELAY, SCM_EOL, SCM_CDR (xorig)); |
0f2d19dd JB |
845 | } |
846 | ||
1cc91f1b | 847 | |
b8229a3b | 848 | SCM_SYNTAX(s_define, "define", scm_makmmacro, scm_m_define); |
2f0d1375 | 849 | SCM_GLOBAL_SYMBOL(scm_sym_define, s_define); |
1cc91f1b | 850 | |
0f2d19dd | 851 | SCM |
6e8d25a6 | 852 | scm_m_define (SCM x, SCM env) |
0f2d19dd JB |
853 | { |
854 | SCM proc, arg1 = x; | |
855 | x = SCM_CDR (x); | |
160bb34a | 856 | SCM_ASSYNT (scm_ilength (x) >= 2, scm_s_expression, s_define); |
0f2d19dd JB |
857 | proc = SCM_CAR (x); |
858 | x = SCM_CDR (x); | |
0c95b57d | 859 | while (SCM_CONSP (proc)) |
0f2d19dd | 860 | { /* nested define syntax */ |
8ea46249 | 861 | x = scm_list_1 (scm_cons2 (scm_sym_lambda, SCM_CDR (proc), x)); |
0f2d19dd JB |
862 | proc = SCM_CAR (proc); |
863 | } | |
160bb34a DH |
864 | SCM_ASSYNT (SCM_SYMBOLP (proc), scm_s_variable, s_define); |
865 | SCM_ASSYNT (1 == scm_ilength (x), scm_s_expression, s_define); | |
0f2d19dd JB |
866 | if (SCM_TOP_LEVEL (env)) |
867 | { | |
868 | x = evalcar (x, env); | |
6dbd0af5 | 869 | #ifdef DEBUG_EXTENSIONS |
80ea260c MD |
870 | if (SCM_REC_PROCNAMES_P && SCM_NIMP (x)) |
871 | { | |
872 | arg1 = x; | |
873 | proc: | |
874 | if (SCM_CLOSUREP (arg1) | |
875 | /* Only the first definition determines the name. */ | |
cf498326 | 876 | && SCM_FALSEP (scm_procedure_property (arg1, scm_sym_name))) |
2f0d1375 | 877 | scm_set_procedure_property_x (arg1, scm_sym_name, proc); |
22a52da1 DH |
878 | else if (SCM_MACROP (arg1) |
879 | /* Dirk::FIXME: Does the following test make sense? */ | |
880 | && !SCM_EQ_P (SCM_MACRO_CODE (arg1), arg1)) | |
80ea260c | 881 | { |
22a52da1 | 882 | arg1 = SCM_MACRO_CODE (arg1); |
80ea260c MD |
883 | goto proc; |
884 | } | |
885 | } | |
6dbd0af5 | 886 | #endif |
86d31dfe MV |
887 | arg1 = scm_sym2var (proc, scm_env_top_level (env), SCM_BOOL_T); |
888 | SCM_VARIABLE_SET (arg1, x); | |
0f2d19dd | 889 | #ifdef SICP |
8ea46249 | 890 | return scm_list_2 (scm_sym_quote, proc); |
0f2d19dd JB |
891 | #else |
892 | return SCM_UNSPECIFIED; | |
893 | #endif | |
894 | } | |
895 | return scm_cons2 (SCM_IM_DEFINE, proc, x); | |
896 | } | |
6dbd0af5 | 897 | |
0f2d19dd JB |
898 | /* end of acros */ |
899 | ||
26d5b9b4 | 900 | static SCM |
e81d98ec | 901 | scm_m_letrec1 (SCM op, SCM imm, SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd JB |
902 | { |
903 | SCM cdrx = SCM_CDR (xorig); /* locally mutable version of form */ | |
3db4adfc | 904 | char *what = SCM_SYMBOL_CHARS (SCM_CAR (xorig)); |
0f2d19dd JB |
905 | SCM x = cdrx, proc, arg1; /* structure traversers */ |
906 | SCM vars = SCM_EOL, inits = SCM_EOL, *initloc = &inits; | |
907 | ||
0f2d19dd | 908 | proc = SCM_CAR (x); |
160bb34a | 909 | SCM_ASSYNT (scm_ilength (proc) >= 1, scm_s_bindings, what); |
0f2d19dd JB |
910 | do |
911 | { | |
912 | /* vars scm_list reversed here, inits reversed at evaluation */ | |
913 | arg1 = SCM_CAR (proc); | |
160bb34a DH |
914 | SCM_ASSYNT (2 == scm_ilength (arg1), scm_s_bindings, what); |
915 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (arg1)), scm_s_variable, what); | |
185ab0ef | 916 | if (scm_c_improper_memq (SCM_CAR (arg1), vars)) |
db4b4ca6 | 917 | scm_misc_error (what, scm_s_duplicate_bindings, SCM_EOL); |
0f2d19dd | 918 | vars = scm_cons (SCM_CAR (arg1), vars); |
8ea46249 | 919 | *initloc = scm_list_1 (SCM_CADR (arg1)); |
a23afe53 | 920 | initloc = SCM_CDRLOC (*initloc); |
0f2d19dd | 921 | } |
ff467021 | 922 | while (SCM_NIMP (proc = SCM_CDR (proc))); |
26d5b9b4 | 923 | |
3a3111a8 MD |
924 | return scm_cons2 (op, vars, |
925 | scm_cons (inits, scm_m_body (imm, SCM_CDR (x), what))); | |
0f2d19dd JB |
926 | } |
927 | ||
26d5b9b4 | 928 | SCM_SYNTAX(s_letrec, "letrec", scm_makmmacro, scm_m_letrec); |
2f0d1375 | 929 | SCM_GLOBAL_SYMBOL(scm_sym_letrec, s_letrec); |
26d5b9b4 MD |
930 | |
931 | SCM | |
6e8d25a6 | 932 | scm_m_letrec (SCM xorig, SCM env) |
26d5b9b4 MD |
933 | { |
934 | SCM x = SCM_CDR (xorig); | |
160bb34a | 935 | SCM_ASSYNT (scm_ilength (x) >= 2, scm_s_body, s_letrec); |
26d5b9b4 MD |
936 | |
937 | if (SCM_NULLP (SCM_CAR (x))) /* null binding, let* faster */ | |
3a3111a8 MD |
938 | return scm_m_letstar (scm_cons2 (SCM_CAR (xorig), SCM_EOL, |
939 | scm_m_body (SCM_IM_LETREC, | |
940 | SCM_CDR (x), | |
941 | s_letrec)), | |
26d5b9b4 MD |
942 | env); |
943 | else | |
944 | return scm_m_letrec1 (SCM_IM_LETREC, SCM_IM_LETREC, xorig, env); | |
945 | } | |
1cc91f1b | 946 | |
b8229a3b | 947 | SCM_SYNTAX(s_let, "let", scm_makmmacro, scm_m_let); |
2f0d1375 | 948 | SCM_GLOBAL_SYMBOL(scm_sym_let, s_let); |
b8229a3b | 949 | |
0f2d19dd | 950 | SCM |
6e8d25a6 | 951 | scm_m_let (SCM xorig, SCM env) |
0f2d19dd JB |
952 | { |
953 | SCM cdrx = SCM_CDR (xorig); /* locally mutable version of form */ | |
954 | SCM x = cdrx, proc, arg1, name; /* structure traversers */ | |
955 | SCM vars = SCM_EOL, inits = SCM_EOL, *varloc = &vars, *initloc = &inits; | |
956 | ||
160bb34a | 957 | SCM_ASSYNT (scm_ilength (x) >= 2, scm_s_body, s_let); |
0f2d19dd JB |
958 | proc = SCM_CAR (x); |
959 | if (SCM_NULLP (proc) | |
0c95b57d | 960 | || (SCM_CONSP (proc) |
26d5b9b4 MD |
961 | && SCM_CONSP (SCM_CAR (proc)) && SCM_NULLP (SCM_CDR (proc)))) |
962 | { | |
963 | /* null or single binding, let* is faster */ | |
3a3111a8 MD |
964 | return scm_m_letstar (scm_cons2 (SCM_CAR (xorig), proc, |
965 | scm_m_body (SCM_IM_LET, | |
966 | SCM_CDR (x), | |
967 | s_let)), | |
26d5b9b4 MD |
968 | env); |
969 | } | |
970 | ||
160bb34a | 971 | SCM_ASSYNT (SCM_NIMP (proc), scm_s_bindings, s_let); |
185ab0ef | 972 | if (SCM_CONSP (proc)) |
26d5b9b4 MD |
973 | { |
974 | /* plain let, proc is <bindings> */ | |
975 | return scm_m_letrec1 (SCM_IM_LET, SCM_IM_LET, xorig, env); | |
976 | } | |
977 | ||
0f2d19dd | 978 | if (!SCM_SYMBOLP (proc)) |
db4b4ca6 | 979 | scm_misc_error (s_let, scm_s_bindings, SCM_EOL); /* bad let */ |
0f2d19dd JB |
980 | name = proc; /* named let, build equiv letrec */ |
981 | x = SCM_CDR (x); | |
160bb34a | 982 | SCM_ASSYNT (scm_ilength (x) >= 2, scm_s_body, s_let); |
26d5b9b4 | 983 | proc = SCM_CAR (x); /* bindings list */ |
160bb34a | 984 | SCM_ASSYNT (scm_ilength (proc) >= 0, scm_s_bindings, s_let); |
ff467021 | 985 | while (SCM_NIMP (proc)) |
0f2d19dd JB |
986 | { /* vars and inits both in order */ |
987 | arg1 = SCM_CAR (proc); | |
160bb34a DH |
988 | SCM_ASSYNT (2 == scm_ilength (arg1), scm_s_bindings, s_let); |
989 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (arg1)), scm_s_variable, s_let); | |
8ea46249 | 990 | *varloc = scm_list_1 (SCM_CAR (arg1)); |
a23afe53 | 991 | varloc = SCM_CDRLOC (*varloc); |
8ea46249 | 992 | *initloc = scm_list_1 (SCM_CADR (arg1)); |
a23afe53 | 993 | initloc = SCM_CDRLOC (*initloc); |
0f2d19dd JB |
994 | proc = SCM_CDR (proc); |
995 | } | |
26d5b9b4 | 996 | |
2f0d1375 | 997 | proc = scm_cons2 (scm_sym_lambda, vars, |
26d5b9b4 | 998 | scm_m_body (SCM_IM_LET, SCM_CDR (x), "let")); |
8ea46249 DH |
999 | proc = scm_list_3 (scm_sym_let, |
1000 | scm_list_1 (scm_list_2 (name, proc)), | |
1001 | scm_cons (name, inits)); | |
26d5b9b4 | 1002 | return scm_m_letrec1 (SCM_IM_LETREC, SCM_IM_LET, proc, env); |
0f2d19dd JB |
1003 | } |
1004 | ||
1005 | ||
81123e6d MD |
1006 | SCM_SYNTAX (s_atapply,"@apply", scm_makmmacro, scm_m_apply); |
1007 | SCM_GLOBAL_SYMBOL (scm_sym_atapply, s_atapply); | |
1008 | SCM_GLOBAL_SYMBOL (scm_sym_apply, s_atapply + 1); | |
1cc91f1b | 1009 | |
0f2d19dd | 1010 | SCM |
e81d98ec | 1011 | scm_m_apply (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 1012 | { |
160bb34a | 1013 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 2, scm_s_expression, s_atapply); |
0f2d19dd JB |
1014 | return scm_cons (SCM_IM_APPLY, SCM_CDR (xorig)); |
1015 | } | |
1016 | ||
b8229a3b MS |
1017 | |
1018 | SCM_SYNTAX(s_atcall_cc,"@call-with-current-continuation", scm_makmmacro, scm_m_cont); | |
2f0d1375 | 1019 | SCM_GLOBAL_SYMBOL(scm_sym_atcall_cc,s_atcall_cc); |
0f2d19dd | 1020 | |
1cc91f1b | 1021 | |
0f2d19dd | 1022 | SCM |
e81d98ec | 1023 | scm_m_cont (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 1024 | { |
6cb702da | 1025 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, |
160bb34a | 1026 | scm_s_expression, s_atcall_cc); |
3a3111a8 | 1027 | return scm_cons (SCM_IM_CONT, SCM_CDR (xorig)); |
0f2d19dd JB |
1028 | } |
1029 | ||
73b64342 MD |
1030 | /* Multi-language support */ |
1031 | ||
86d31dfe | 1032 | SCM_GLOBAL_SYMBOL (scm_lisp_nil, "nil"); |
1385d8ae | 1033 | SCM_GLOBAL_SYMBOL (scm_lisp_t, "t"); |
73b64342 MD |
1034 | |
1035 | SCM_SYNTAX (s_nil_cond, "nil-cond", scm_makmmacro, scm_m_nil_cond); | |
1036 | ||
1037 | SCM | |
e81d98ec | 1038 | scm_m_nil_cond (SCM xorig, SCM env SCM_UNUSED) |
73b64342 | 1039 | { |
c014a02e | 1040 | long len = scm_ilength (SCM_CDR (xorig)); |
160bb34a | 1041 | SCM_ASSYNT (len >= 1 && (len & 1) == 1, scm_s_expression, "nil-cond"); |
73b64342 MD |
1042 | return scm_cons (SCM_IM_NIL_COND, SCM_CDR (xorig)); |
1043 | } | |
1044 | ||
1045 | SCM_SYNTAX (s_nil_ify, "nil-ify", scm_makmmacro, scm_m_nil_ify); | |
1046 | ||
1047 | SCM | |
e81d98ec | 1048 | scm_m_nil_ify (SCM xorig, SCM env SCM_UNUSED) |
73b64342 | 1049 | { |
160bb34a | 1050 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, scm_s_expression, "nil-ify"); |
73b64342 MD |
1051 | return scm_cons (SCM_IM_NIL_IFY, SCM_CDR (xorig)); |
1052 | } | |
1053 | ||
1054 | SCM_SYNTAX (s_t_ify, "t-ify", scm_makmmacro, scm_m_t_ify); | |
1055 | ||
1056 | SCM | |
e81d98ec | 1057 | scm_m_t_ify (SCM xorig, SCM env SCM_UNUSED) |
73b64342 | 1058 | { |
160bb34a | 1059 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, scm_s_expression, "t-ify"); |
73b64342 MD |
1060 | return scm_cons (SCM_IM_T_IFY, SCM_CDR (xorig)); |
1061 | } | |
1062 | ||
1063 | SCM_SYNTAX (s_0_cond, "0-cond", scm_makmmacro, scm_m_0_cond); | |
1064 | ||
1065 | SCM | |
e81d98ec | 1066 | scm_m_0_cond (SCM xorig, SCM env SCM_UNUSED) |
73b64342 | 1067 | { |
c014a02e | 1068 | long len = scm_ilength (SCM_CDR (xorig)); |
160bb34a | 1069 | SCM_ASSYNT (len >= 1 && (len & 1) == 1, scm_s_expression, "0-cond"); |
73b64342 MD |
1070 | return scm_cons (SCM_IM_0_COND, SCM_CDR (xorig)); |
1071 | } | |
1072 | ||
1073 | SCM_SYNTAX (s_0_ify, "0-ify", scm_makmmacro, scm_m_0_ify); | |
1074 | ||
1075 | SCM | |
e81d98ec | 1076 | scm_m_0_ify (SCM xorig, SCM env SCM_UNUSED) |
73b64342 | 1077 | { |
160bb34a | 1078 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, scm_s_expression, "0-ify"); |
73b64342 MD |
1079 | return scm_cons (SCM_IM_0_IFY, SCM_CDR (xorig)); |
1080 | } | |
1081 | ||
1082 | SCM_SYNTAX (s_1_ify, "1-ify", scm_makmmacro, scm_m_1_ify); | |
1083 | ||
1084 | SCM | |
e81d98ec | 1085 | scm_m_1_ify (SCM xorig, SCM env SCM_UNUSED) |
73b64342 | 1086 | { |
160bb34a | 1087 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, scm_s_expression, "1-ify"); |
73b64342 MD |
1088 | return scm_cons (SCM_IM_1_IFY, SCM_CDR (xorig)); |
1089 | } | |
1090 | ||
1091 | SCM_SYNTAX (s_atfop, "@fop", scm_makmmacro, scm_m_atfop); | |
1092 | ||
1093 | SCM | |
e81d98ec | 1094 | scm_m_atfop (SCM xorig, SCM env SCM_UNUSED) |
73b64342 | 1095 | { |
86d31dfe | 1096 | SCM x = SCM_CDR (xorig), var; |
160bb34a | 1097 | SCM_ASSYNT (scm_ilength (x) >= 1, scm_s_expression, "@fop"); |
86d31dfe MV |
1098 | var = scm_symbol_fref (SCM_CAR (x)); |
1099 | SCM_ASSYNT (SCM_VARIABLEP (var), | |
73b64342 | 1100 | "Symbol's function definition is void", NULL); |
904a077d | 1101 | SCM_SETCAR (x, var); |
73b64342 MD |
1102 | return x; |
1103 | } | |
1104 | ||
2e171178 MV |
1105 | /* (@bind ((var exp) ...) body ...) |
1106 | ||
1107 | This will assign the values of the `exp's to the global variables | |
1108 | named by `var's (symbols, not evaluated), creating them if they | |
1109 | don't exist, executes body, and then restores the previous values of | |
1110 | the `var's. Additionally, whenever control leaves body, the values | |
1111 | of the `var's are saved and restored when control returns. It is an | |
1112 | error when a symbol appears more than once among the `var's. | |
1113 | All `exp's are evaluated before any `var' is set. | |
1114 | ||
1115 | This of this as `let' for dynamic scope. | |
1116 | ||
1117 | It is memoized into (#@bind ((var ...) . (reversed-val ...)) body ...). | |
1118 | ||
1119 | XXX - also implement `@bind*'. | |
1120 | */ | |
1121 | ||
73b64342 MD |
1122 | SCM_SYNTAX (s_atbind, "@bind", scm_makmmacro, scm_m_atbind); |
1123 | ||
1124 | SCM | |
1125 | scm_m_atbind (SCM xorig, SCM env) | |
1126 | { | |
1127 | SCM x = SCM_CDR (xorig); | |
2e171178 | 1128 | SCM top_level = scm_env_top_level (env); |
311f6782 | 1129 | SCM vars = SCM_EOL, var; |
2e171178 MV |
1130 | SCM exps = SCM_EOL; |
1131 | ||
1132 | SCM_ASSYNT (scm_ilength (x) > 1, scm_s_expression, s_atbind); | |
73b64342 | 1133 | |
73b64342 MD |
1134 | x = SCM_CAR (x); |
1135 | while (SCM_NIMP (x)) | |
1136 | { | |
2e171178 MV |
1137 | SCM rest; |
1138 | SCM sym_exp = SCM_CAR (x); | |
1139 | SCM_ASSYNT (scm_ilength (sym_exp) == 2, scm_s_bindings, s_atbind); | |
1140 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (sym_exp)), scm_s_bindings, s_atbind); | |
73b64342 | 1141 | x = SCM_CDR (x); |
2e171178 | 1142 | for (rest = x; SCM_NIMP (rest); rest = SCM_CDR (rest)) |
8ea46249 | 1143 | if (SCM_EQ_P (SCM_CAR (sym_exp), SCM_CAAR (rest))) |
2e171178 | 1144 | scm_misc_error (s_atbind, scm_s_duplicate_bindings, SCM_EOL); |
311f6782 MV |
1145 | /* The first call to scm_sym2var will look beyond the current |
1146 | module, while the second call wont. */ | |
1147 | var = scm_sym2var (SCM_CAR (sym_exp), top_level, SCM_BOOL_F); | |
1148 | if (SCM_FALSEP (var)) | |
1149 | var = scm_sym2var (SCM_CAR (sym_exp), top_level, SCM_BOOL_T); | |
1150 | vars = scm_cons (var, vars); | |
2e171178 | 1151 | exps = scm_cons (SCM_CADR (sym_exp), exps); |
73b64342 | 1152 | } |
2e171178 MV |
1153 | return scm_cons (SCM_IM_BIND, |
1154 | scm_cons (scm_cons (scm_reverse_x (vars, SCM_EOL), exps), | |
1155 | SCM_CDDR (xorig))); | |
73b64342 | 1156 | } |
73b64342 | 1157 | |
a513ead3 MV |
1158 | SCM_SYNTAX (s_at_call_with_values, "@call-with-values", scm_makmmacro, scm_m_at_call_with_values); |
1159 | SCM_GLOBAL_SYMBOL(scm_sym_at_call_with_values, s_at_call_with_values); | |
1160 | ||
1161 | SCM | |
e81d98ec | 1162 | scm_m_at_call_with_values (SCM xorig, SCM env SCM_UNUSED) |
a513ead3 MV |
1163 | { |
1164 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 2, | |
1165 | scm_s_expression, s_at_call_with_values); | |
1166 | return scm_cons (SCM_IM_CALL_WITH_VALUES, SCM_CDR (xorig)); | |
1167 | } | |
1168 | ||
26d5b9b4 MD |
1169 | SCM |
1170 | scm_m_expand_body (SCM xorig, SCM env) | |
1171 | { | |
22a52da1 | 1172 | SCM x = SCM_CDR (xorig), defs = SCM_EOL; |
26d5b9b4 MD |
1173 | char *what = SCM_ISYMCHARS (SCM_CAR (xorig)) + 2; |
1174 | ||
1175 | while (SCM_NIMP (x)) | |
1176 | { | |
22a52da1 DH |
1177 | SCM form = SCM_CAR (x); |
1178 | if (!SCM_CONSP (form)) | |
26d5b9b4 MD |
1179 | break; |
1180 | if (!SCM_SYMBOLP (SCM_CAR (form))) | |
1181 | break; | |
22a52da1 | 1182 | |
3a3111a8 MD |
1183 | form = scm_macroexp (scm_cons_source (form, |
1184 | SCM_CAR (form), | |
1185 | SCM_CDR (form)), | |
1186 | env); | |
26d5b9b4 | 1187 | |
cf498326 | 1188 | if (SCM_EQ_P (SCM_IM_DEFINE, SCM_CAR (form))) |
26d5b9b4 MD |
1189 | { |
1190 | defs = scm_cons (SCM_CDR (form), defs); | |
22a52da1 | 1191 | x = SCM_CDR (x); |
26d5b9b4 | 1192 | } |
22a52da1 | 1193 | else if (!SCM_IMP (defs)) |
26d5b9b4 MD |
1194 | { |
1195 | break; | |
1196 | } | |
cf498326 | 1197 | else if (SCM_EQ_P (SCM_IM_BEGIN, SCM_CAR (form))) |
26d5b9b4 | 1198 | { |
8ea46249 | 1199 | x = scm_append (scm_list_2 (SCM_CDR (form), SCM_CDR (x))); |
26d5b9b4 MD |
1200 | } |
1201 | else | |
1202 | { | |
22a52da1 | 1203 | x = scm_cons (form, SCM_CDR (x)); |
26d5b9b4 MD |
1204 | break; |
1205 | } | |
1206 | } | |
1207 | ||
160bb34a | 1208 | SCM_ASSYNT (SCM_NIMP (x), scm_s_body, what); |
26d5b9b4 MD |
1209 | if (SCM_NIMP (defs)) |
1210 | { | |
8ea46249 DH |
1211 | x = scm_list_1 (scm_m_letrec1 (SCM_IM_LETREC, |
1212 | SCM_IM_DEFINE, | |
1213 | scm_cons2 (scm_sym_define, defs, x), | |
1214 | env)); | |
26d5b9b4 MD |
1215 | } |
1216 | ||
1217 | SCM_DEFER_INTS; | |
1218 | SCM_SETCAR (xorig, SCM_CAR (x)); | |
1219 | SCM_SETCDR (xorig, SCM_CDR (x)); | |
1220 | SCM_ALLOW_INTS; | |
1221 | ||
1222 | return xorig; | |
1223 | } | |
1224 | ||
1225 | SCM | |
1226 | scm_macroexp (SCM x, SCM env) | |
1227 | { | |
86d31dfe | 1228 | SCM res, proc, orig_sym; |
26d5b9b4 MD |
1229 | |
1230 | /* Don't bother to produce error messages here. We get them when we | |
1231 | eventually execute the code for real. */ | |
1232 | ||
1233 | macro_tail: | |
86d31dfe MV |
1234 | orig_sym = SCM_CAR (x); |
1235 | if (!SCM_SYMBOLP (orig_sym)) | |
26d5b9b4 MD |
1236 | return x; |
1237 | ||
1238 | #ifdef USE_THREADS | |
1239 | { | |
1240 | SCM *proc_ptr = scm_lookupcar1 (x, env, 0); | |
1241 | if (proc_ptr == NULL) | |
1242 | { | |
1243 | /* We have lost the race. */ | |
1244 | goto macro_tail; | |
1245 | } | |
1246 | proc = *proc_ptr; | |
1247 | } | |
1248 | #else | |
1249 | proc = *scm_lookupcar (x, env, 0); | |
1250 | #endif | |
1251 | ||
1252 | /* Only handle memoizing macros. `Acros' and `macros' are really | |
1253 | special forms and should not be evaluated here. */ | |
1254 | ||
22a52da1 | 1255 | if (!SCM_MACROP (proc) || SCM_MACRO_TYPE (proc) != 2) |
26d5b9b4 MD |
1256 | return x; |
1257 | ||
86d31dfe | 1258 | SCM_SETCAR (x, orig_sym); /* Undo memoizing effect of lookupcar */ |
fdc28395 | 1259 | res = scm_call_2 (SCM_MACRO_CODE (proc), x, env); |
26d5b9b4 MD |
1260 | |
1261 | if (scm_ilength (res) <= 0) | |
8ea46249 | 1262 | res = scm_list_2 (SCM_IM_BEGIN, res); |
26d5b9b4 | 1263 | |
26d5b9b4 MD |
1264 | SCM_DEFER_INTS; |
1265 | SCM_SETCAR (x, SCM_CAR (res)); | |
1266 | SCM_SETCDR (x, SCM_CDR (res)); | |
1267 | SCM_ALLOW_INTS; | |
1268 | ||
1269 | goto macro_tail; | |
1270 | } | |
73b64342 | 1271 | |
6dbd0af5 MD |
1272 | /* scm_unmemocopy takes a memoized expression together with its |
1273 | * environment and rewrites it to its original form. Thus, it is the | |
1274 | * inversion of the rewrite rules above. The procedure is not | |
1275 | * optimized for speed. It's used in scm_iprin1 when printing the | |
220ff1eb MD |
1276 | * code of a closure, in scm_procedure_source, in display_frame when |
1277 | * generating the source for a stackframe in a backtrace, and in | |
1278 | * display_expression. | |
86d31dfe MV |
1279 | * |
1280 | * Unmemoizing is not a realiable process. You can not in general | |
1281 | * expect to get the original source back. | |
1282 | * | |
1283 | * However, GOOPS currently relies on this for method compilation. | |
1284 | * This ought to change. | |
26d5b9b4 MD |
1285 | */ |
1286 | ||
f1267706 | 1287 | #define SCM_BIT8(x) (127 & SCM_UNPACK (x)) |
c209c88e | 1288 | |
8ea46249 DH |
1289 | static SCM |
1290 | build_binding_list (SCM names, SCM inits) | |
1291 | { | |
1292 | SCM bindings = SCM_EOL; | |
1293 | while (!SCM_NULLP (names)) | |
1294 | { | |
1295 | SCM binding = scm_list_2 (SCM_CAR (names), SCM_CAR (inits)); | |
1296 | bindings = scm_cons (binding, bindings); | |
1297 | names = SCM_CDR (names); | |
1298 | inits = SCM_CDR (inits); | |
1299 | } | |
1300 | return bindings; | |
1301 | } | |
1302 | ||
6dbd0af5 | 1303 | static SCM |
1bbd0b84 | 1304 | unmemocopy (SCM x, SCM env) |
6dbd0af5 MD |
1305 | { |
1306 | SCM ls, z; | |
1307 | #ifdef DEBUG_EXTENSIONS | |
1308 | SCM p; | |
1309 | #endif | |
8c494e99 | 1310 | if (!SCM_CONSP (x)) |
6dbd0af5 MD |
1311 | return x; |
1312 | #ifdef DEBUG_EXTENSIONS | |
1313 | p = scm_whash_lookup (scm_source_whash, x); | |
1314 | #endif | |
8ea46249 | 1315 | switch (SCM_ITAG7 (SCM_CAR (x))) |
6dbd0af5 | 1316 | { |
c209c88e | 1317 | case SCM_BIT8(SCM_IM_AND): |
2f0d1375 | 1318 | ls = z = scm_cons (scm_sym_and, SCM_UNSPECIFIED); |
6dbd0af5 | 1319 | break; |
c209c88e | 1320 | case SCM_BIT8(SCM_IM_BEGIN): |
2f0d1375 | 1321 | ls = z = scm_cons (scm_sym_begin, SCM_UNSPECIFIED); |
6dbd0af5 | 1322 | break; |
c209c88e | 1323 | case SCM_BIT8(SCM_IM_CASE): |
2f0d1375 | 1324 | ls = z = scm_cons (scm_sym_case, SCM_UNSPECIFIED); |
6dbd0af5 | 1325 | break; |
c209c88e | 1326 | case SCM_BIT8(SCM_IM_COND): |
2f0d1375 | 1327 | ls = z = scm_cons (scm_sym_cond, SCM_UNSPECIFIED); |
6dbd0af5 | 1328 | break; |
8ea46249 | 1329 | case SCM_BIT8 (SCM_IM_DO): |
6dbd0af5 | 1330 | { |
8ea46249 DH |
1331 | /* format: (#@do (nk nk-1 ...) (i1 ... ik) (test) (body) s1 ... sk), |
1332 | * where nx is the name of a local variable, ix is an initializer for | |
1333 | * the local variable, test is the test clause of the do loop, body is | |
1334 | * the body of the do loop and sx are the step clauses for the local | |
1335 | * variables. */ | |
1336 | SCM names, inits, test, memoized_body, steps, bindings; | |
1337 | ||
1338 | x = SCM_CDR (x); | |
1339 | names = SCM_CAR (x); | |
6dbd0af5 | 1340 | x = SCM_CDR (x); |
8ea46249 DH |
1341 | inits = scm_reverse (unmemocopy (SCM_CAR (x), env)); |
1342 | env = EXTEND_ENV (names, SCM_EOL, env); | |
6dbd0af5 | 1343 | x = SCM_CDR (x); |
8ea46249 DH |
1344 | test = unmemocopy (SCM_CAR (x), env); |
1345 | x = SCM_CDR (x); | |
1346 | memoized_body = SCM_CAR (x); | |
1347 | x = SCM_CDR (x); | |
1348 | steps = scm_reverse (unmemocopy (x, env)); | |
1349 | ||
26d5b9b4 | 1350 | /* build transformed binding list */ |
8ea46249 DH |
1351 | bindings = SCM_EOL; |
1352 | while (!SCM_NULLP (names)) | |
6dbd0af5 | 1353 | { |
8ea46249 DH |
1354 | SCM name = SCM_CAR (names); |
1355 | SCM init = SCM_CAR (inits); | |
1356 | SCM step = SCM_CAR (steps); | |
1357 | step = SCM_EQ_P (step, name) ? SCM_EOL : scm_list_1 (step); | |
1358 | ||
1359 | bindings = scm_cons (scm_cons2 (name, init, step), bindings); | |
1360 | ||
1361 | names = SCM_CDR (names); | |
1362 | inits = SCM_CDR (inits); | |
1363 | steps = SCM_CDR (steps); | |
6dbd0af5 | 1364 | } |
8ea46249 DH |
1365 | z = scm_cons (test, SCM_UNSPECIFIED); |
1366 | ls = scm_cons2 (scm_sym_do, bindings, z); | |
1367 | ||
1368 | x = scm_cons (SCM_BOOL_F, memoized_body); | |
1369 | break; | |
1370 | } | |
1371 | case SCM_BIT8(SCM_IM_IF): | |
1372 | ls = z = scm_cons (scm_sym_if, SCM_UNSPECIFIED); | |
1373 | break; | |
1374 | case SCM_BIT8 (SCM_IM_LET): | |
1375 | { | |
1376 | /* format: (#@let (nk nk-1 ...) (i1 ... ik) b1 ...), | |
1377 | * where nx is the name of a local variable, ix is an initializer for | |
1378 | * the local variable and by are the body clauses. */ | |
1379 | SCM names, inits, bindings; | |
1380 | ||
1381 | x = SCM_CDR (x); | |
1382 | names = SCM_CAR (x); | |
1383 | x = SCM_CDR (x); | |
1384 | inits = scm_reverse (unmemocopy (SCM_CAR (x), env)); | |
1385 | env = EXTEND_ENV (names, SCM_EOL, env); | |
1386 | ||
1387 | bindings = build_binding_list (names, inits); | |
1388 | z = scm_cons (bindings, SCM_UNSPECIFIED); | |
1389 | ls = scm_cons (scm_sym_let, z); | |
1390 | break; | |
1391 | } | |
1392 | case SCM_BIT8 (SCM_IM_LETREC): | |
1393 | { | |
1394 | /* format: (#@letrec (nk nk-1 ...) (i1 ... ik) b1 ...), | |
1395 | * where nx is the name of a local variable, ix is an initializer for | |
1396 | * the local variable and by are the body clauses. */ | |
1397 | SCM names, inits, bindings; | |
1398 | ||
1399 | x = SCM_CDR (x); | |
1400 | names = SCM_CAR (x); | |
1401 | env = EXTEND_ENV (names, SCM_EOL, env); | |
1402 | x = SCM_CDR (x); | |
1403 | inits = scm_reverse (unmemocopy (SCM_CAR (x), env)); | |
1404 | ||
1405 | bindings = build_binding_list (names, inits); | |
1406 | z = scm_cons (bindings, SCM_UNSPECIFIED); | |
1407 | ls = scm_cons (scm_sym_letrec, z); | |
6dbd0af5 MD |
1408 | break; |
1409 | } | |
c209c88e | 1410 | case SCM_BIT8(SCM_IM_LETSTAR): |
6dbd0af5 MD |
1411 | { |
1412 | SCM b, y; | |
1413 | x = SCM_CDR (x); | |
1414 | b = SCM_CAR (x); | |
1415 | y = SCM_EOL; | |
1416 | if SCM_IMP (b) | |
1417 | { | |
e2806c10 | 1418 | env = EXTEND_ENV (SCM_EOL, SCM_EOL, env); |
6dbd0af5 MD |
1419 | goto letstar; |
1420 | } | |
1421 | y = z = scm_acons (SCM_CAR (b), | |
1422 | unmemocar ( | |
8ea46249 | 1423 | scm_cons (unmemocopy (SCM_CADR (b), env), SCM_EOL), env), |
6dbd0af5 | 1424 | SCM_UNSPECIFIED); |
e2806c10 | 1425 | env = EXTEND_ENV (SCM_CAR (b), SCM_BOOL_F, env); |
8ea46249 | 1426 | b = SCM_CDDR (b); |
6dbd0af5 MD |
1427 | if (SCM_IMP (b)) |
1428 | { | |
1429 | SCM_SETCDR (y, SCM_EOL); | |
2f0d1375 | 1430 | ls = scm_cons (scm_sym_let, z = scm_cons (y, SCM_UNSPECIFIED)); |
6dbd0af5 MD |
1431 | break; |
1432 | } | |
1433 | do | |
1434 | { | |
a23afe53 MD |
1435 | SCM_SETCDR (z, scm_acons (SCM_CAR (b), |
1436 | unmemocar ( | |
8ea46249 | 1437 | scm_list_1 (unmemocopy (SCM_CADR (b), env)), env), |
a23afe53 MD |
1438 | SCM_UNSPECIFIED)); |
1439 | z = SCM_CDR (z); | |
e2806c10 | 1440 | env = EXTEND_ENV (SCM_CAR (b), SCM_BOOL_F, env); |
8ea46249 | 1441 | b = SCM_CDDR (b); |
6dbd0af5 | 1442 | } |
ff467021 | 1443 | while (SCM_NIMP (b)); |
a23afe53 | 1444 | SCM_SETCDR (z, SCM_EOL); |
6dbd0af5 | 1445 | letstar: |
2f0d1375 | 1446 | ls = scm_cons (scm_sym_letstar, z = scm_cons (y, SCM_UNSPECIFIED)); |
6dbd0af5 MD |
1447 | break; |
1448 | } | |
c209c88e | 1449 | case SCM_BIT8(SCM_IM_OR): |
2f0d1375 | 1450 | ls = z = scm_cons (scm_sym_or, SCM_UNSPECIFIED); |
6dbd0af5 | 1451 | break; |
c209c88e | 1452 | case SCM_BIT8(SCM_IM_LAMBDA): |
6dbd0af5 | 1453 | x = SCM_CDR (x); |
8ea46249 DH |
1454 | z = scm_cons (SCM_CAR (x), SCM_UNSPECIFIED); |
1455 | ls = scm_cons (scm_sym_lambda, z); | |
e2806c10 | 1456 | env = EXTEND_ENV (SCM_CAR (x), SCM_EOL, env); |
6dbd0af5 | 1457 | break; |
c209c88e | 1458 | case SCM_BIT8(SCM_IM_QUOTE): |
2f0d1375 | 1459 | ls = z = scm_cons (scm_sym_quote, SCM_UNSPECIFIED); |
6dbd0af5 | 1460 | break; |
c209c88e | 1461 | case SCM_BIT8(SCM_IM_SET_X): |
89efbff4 | 1462 | ls = z = scm_cons (scm_sym_set_x, SCM_UNSPECIFIED); |
6dbd0af5 | 1463 | break; |
c209c88e | 1464 | case SCM_BIT8(SCM_IM_DEFINE): |
6dbd0af5 MD |
1465 | { |
1466 | SCM n; | |
1467 | x = SCM_CDR (x); | |
8ea46249 DH |
1468 | n = SCM_CAR (x); |
1469 | z = scm_cons (n, SCM_UNSPECIFIED); | |
1470 | ls = scm_cons (scm_sym_define, z); | |
01f11e02 | 1471 | if (!SCM_NULLP (env)) |
8ea46249 | 1472 | SCM_SETCAR (SCM_CAR (env), scm_cons (n, SCM_CAAR (env))); |
6dbd0af5 MD |
1473 | break; |
1474 | } | |
c209c88e | 1475 | case SCM_BIT8(SCM_MAKISYM (0)): |
6dbd0af5 MD |
1476 | z = SCM_CAR (x); |
1477 | if (!SCM_ISYMP (z)) | |
1478 | goto unmemo; | |
ff467021 | 1479 | switch (SCM_ISYMNUM (z)) |
6dbd0af5 MD |
1480 | { |
1481 | case (SCM_ISYMNUM (SCM_IM_APPLY)): | |
2f0d1375 | 1482 | ls = z = scm_cons (scm_sym_atapply, SCM_UNSPECIFIED); |
6dbd0af5 MD |
1483 | goto loop; |
1484 | case (SCM_ISYMNUM (SCM_IM_CONT)): | |
2f0d1375 | 1485 | ls = z = scm_cons (scm_sym_atcall_cc, SCM_UNSPECIFIED); |
6dbd0af5 | 1486 | goto loop; |
a570e93a MD |
1487 | case (SCM_ISYMNUM (SCM_IM_DELAY)): |
1488 | ls = z = scm_cons (scm_sym_delay, SCM_UNSPECIFIED); | |
1489 | x = SCM_CDR (x); | |
1490 | goto loop; | |
a513ead3 MV |
1491 | case (SCM_ISYMNUM (SCM_IM_CALL_WITH_VALUES)): |
1492 | ls = z = scm_cons (scm_sym_at_call_with_values, SCM_UNSPECIFIED); | |
1493 | goto loop; | |
6dbd0af5 | 1494 | default: |
fa888178 | 1495 | /* appease the Sun compiler god: */ ; |
6dbd0af5 MD |
1496 | } |
1497 | unmemo: | |
1498 | default: | |
1499 | ls = z = unmemocar (scm_cons (unmemocopy (SCM_CAR (x), env), | |
1500 | SCM_UNSPECIFIED), | |
1501 | env); | |
1502 | } | |
1503 | loop: | |
8c494e99 DH |
1504 | x = SCM_CDR (x); |
1505 | while (SCM_CONSP (x)) | |
a23afe53 | 1506 | { |
8c494e99 DH |
1507 | SCM form = SCM_CAR (x); |
1508 | if (!SCM_ISYMP (form)) | |
1509 | { | |
1510 | SCM copy = scm_cons (unmemocopy (form, env), SCM_UNSPECIFIED); | |
1511 | SCM_SETCDR (z, unmemocar (copy, env)); | |
1512 | z = SCM_CDR (z); | |
1513 | } | |
1514 | x = SCM_CDR (x); | |
a23afe53 MD |
1515 | } |
1516 | SCM_SETCDR (z, x); | |
6dbd0af5 | 1517 | #ifdef DEBUG_EXTENSIONS |
01f11e02 | 1518 | if (!SCM_FALSEP (p)) |
6dbd0af5 MD |
1519 | scm_whash_insert (scm_source_whash, ls, p); |
1520 | #endif | |
1521 | return ls; | |
1522 | } | |
1523 | ||
1cc91f1b | 1524 | |
6dbd0af5 | 1525 | SCM |
6e8d25a6 | 1526 | scm_unmemocopy (SCM x, SCM env) |
6dbd0af5 | 1527 | { |
01f11e02 | 1528 | if (!SCM_NULLP (env)) |
6dbd0af5 MD |
1529 | /* Make a copy of the lowest frame to protect it from |
1530 | modifications by SCM_IM_DEFINE */ | |
1531 | return unmemocopy (x, scm_cons (SCM_CAR (env), SCM_CDR (env))); | |
1532 | else | |
1533 | return unmemocopy (x, env); | |
1534 | } | |
1535 | ||
cf7c17e9 | 1536 | #ifndef SCM_RECKLESS |
1cc91f1b | 1537 | |
0f2d19dd | 1538 | int |
6e8d25a6 | 1539 | scm_badargsp (SCM formals, SCM args) |
0f2d19dd | 1540 | { |
ff467021 | 1541 | while (SCM_NIMP (formals)) |
0f2d19dd | 1542 | { |
01f11e02 | 1543 | if (!SCM_CONSP (formals)) |
ff467021 JB |
1544 | return 0; |
1545 | if (SCM_IMP(args)) | |
1546 | return 1; | |
0f2d19dd JB |
1547 | formals = SCM_CDR (formals); |
1548 | args = SCM_CDR (args); | |
1549 | } | |
01f11e02 | 1550 | return !SCM_NULLP (args) ? 1 : 0; |
0f2d19dd JB |
1551 | } |
1552 | #endif | |
1553 | ||
002f1a5d MD |
1554 | static int |
1555 | scm_badformalsp (SCM closure, int n) | |
1556 | { | |
726d810a DH |
1557 | SCM formals = SCM_CLOSURE_FORMALS (closure); |
1558 | while (!SCM_NULLP (formals)) | |
002f1a5d | 1559 | { |
726d810a | 1560 | if (!SCM_CONSP (formals)) |
002f1a5d MD |
1561 | return 0; |
1562 | if (n == 0) | |
1563 | return 1; | |
1564 | --n; | |
1565 | formals = SCM_CDR (formals); | |
1566 | } | |
1567 | return n; | |
1568 | } | |
0f2d19dd JB |
1569 | |
1570 | \f | |
6dbd0af5 | 1571 | SCM |
6e8d25a6 | 1572 | scm_eval_args (SCM l, SCM env, SCM proc) |
6dbd0af5 | 1573 | { |
680ed4a8 | 1574 | SCM results = SCM_EOL, *lloc = &results, res; |
904a077d | 1575 | while (SCM_CONSP (l)) |
6dbd0af5 | 1576 | { |
680ed4a8 | 1577 | res = EVALCAR (l, env); |
904a077d | 1578 | |
8ea46249 | 1579 | *lloc = scm_list_1 (res); |
a23afe53 | 1580 | lloc = SCM_CDRLOC (*lloc); |
6dbd0af5 MD |
1581 | l = SCM_CDR (l); |
1582 | } | |
cf7c17e9 | 1583 | #ifdef SCM_CAUTIOUS |
22a52da1 | 1584 | if (!SCM_NULLP (l)) |
904a077d | 1585 | scm_wrong_num_args (proc); |
680ed4a8 MD |
1586 | #endif |
1587 | return results; | |
6dbd0af5 | 1588 | } |
c4ac4d88 | 1589 | |
9de33deb MD |
1590 | SCM |
1591 | scm_eval_body (SCM code, SCM env) | |
1592 | { | |
1593 | SCM next; | |
1594 | again: | |
01f11e02 DH |
1595 | next = SCM_CDR (code); |
1596 | while (!SCM_NULLP (next)) | |
9de33deb MD |
1597 | { |
1598 | if (SCM_IMP (SCM_CAR (code))) | |
1599 | { | |
1600 | if (SCM_ISYMP (SCM_CAR (code))) | |
1601 | { | |
1602 | code = scm_m_expand_body (code, env); | |
1603 | goto again; | |
1604 | } | |
1605 | } | |
1606 | else | |
1607 | SCM_XEVAL (SCM_CAR (code), env); | |
1608 | code = next; | |
01f11e02 | 1609 | next = SCM_CDR (code); |
9de33deb MD |
1610 | } |
1611 | return SCM_XEVALCAR (code, env); | |
1612 | } | |
1613 | ||
c4ac4d88 | 1614 | |
0f2d19dd JB |
1615 | #endif /* !DEVAL */ |
1616 | ||
6dbd0af5 MD |
1617 | |
1618 | /* SECTION: This code is specific for the debugging support. One | |
1619 | * branch is read when DEVAL isn't defined, the other when DEVAL is | |
1620 | * defined. | |
1621 | */ | |
1622 | ||
1623 | #ifndef DEVAL | |
1624 | ||
1625 | #define SCM_APPLY scm_apply | |
1626 | #define PREP_APPLY(proc, args) | |
1627 | #define ENTER_APPLY | |
ddea3325 | 1628 | #define RETURN(x) do { return x; } while (0) |
b7ff98dd MD |
1629 | #ifdef STACK_CHECKING |
1630 | #ifndef NO_CEVAL_STACK_CHECKING | |
1631 | #define EVAL_STACK_CHECKING | |
1632 | #endif | |
6dbd0af5 MD |
1633 | #endif |
1634 | ||
1635 | #else /* !DEVAL */ | |
1636 | ||
0f2d19dd JB |
1637 | #undef SCM_CEVAL |
1638 | #define SCM_CEVAL scm_deval /* Substitute all uses of scm_ceval */ | |
1639 | #undef SCM_APPLY | |
1640 | #define SCM_APPLY scm_dapply | |
6dbd0af5 MD |
1641 | #undef PREP_APPLY |
1642 | #define PREP_APPLY(p, l) \ | |
1643 | { ++debug.info; debug.info->a.proc = p; debug.info->a.args = l; } | |
1644 | #undef ENTER_APPLY | |
1645 | #define ENTER_APPLY \ | |
d3a6bc94 | 1646 | do { \ |
b7ff98dd | 1647 | SCM_SET_ARGSREADY (debug);\ |
b6d75948 | 1648 | if (CHECK_APPLY && SCM_TRAPS_P)\ |
b7ff98dd | 1649 | if (SCM_APPLY_FRAME_P || (SCM_TRACE_P && PROCTRACEP (proc)))\ |
6dbd0af5 | 1650 | {\ |
156dcb09 | 1651 | SCM tmp, tail = SCM_BOOL(SCM_TRACED_FRAME_P (debug)); \ |
c6a4fbce | 1652 | SCM_SET_TRACED_FRAME (debug); \ |
d95c0b76 | 1653 | SCM_TRAPS_P = 0;\ |
b7ff98dd | 1654 | if (SCM_CHEAPTRAPS_P)\ |
6dbd0af5 | 1655 | {\ |
c0ab1b8d | 1656 | tmp = scm_make_debugobj (&debug);\ |
d95c0b76 | 1657 | scm_call_3 (SCM_APPLY_FRAME_HDLR, scm_sym_apply_frame, tmp, tail);\ |
b6d75948 | 1658 | }\ |
6dbd0af5 MD |
1659 | else\ |
1660 | {\ | |
5f144b10 GH |
1661 | int first;\ |
1662 | tmp = scm_make_continuation (&first);\ | |
1663 | if (first)\ | |
d95c0b76 | 1664 | scm_call_3 (SCM_APPLY_FRAME_HDLR, scm_sym_apply_frame, tmp, tail);\ |
6dbd0af5 | 1665 | }\ |
d95c0b76 | 1666 | SCM_TRAPS_P = 1;\ |
6dbd0af5 | 1667 | }\ |
d3a6bc94 | 1668 | } while (0) |
0f2d19dd | 1669 | #undef RETURN |
ddea3325 | 1670 | #define RETURN(e) do { proc = (e); goto exit; } while (0) |
b7ff98dd MD |
1671 | #ifdef STACK_CHECKING |
1672 | #ifndef EVAL_STACK_CHECKING | |
1673 | #define EVAL_STACK_CHECKING | |
1674 | #endif | |
6dbd0af5 MD |
1675 | #endif |
1676 | ||
1677 | /* scm_ceval_ptr points to the currently selected evaluator. | |
1678 | * *fixme*: Although efficiency is important here, this state variable | |
1679 | * should probably not be a global. It should be related to the | |
1680 | * current repl. | |
1681 | */ | |
1682 | ||
1cc91f1b | 1683 | |
1bbd0b84 | 1684 | SCM (*scm_ceval_ptr) (SCM x, SCM env); |
0f2d19dd | 1685 | |
1646d37b | 1686 | /* scm_last_debug_frame contains a pointer to the last debugging |
6dbd0af5 MD |
1687 | * information stack frame. It is accessed very often from the |
1688 | * debugging evaluator, so it should probably not be indirectly | |
1689 | * addressed. Better to save and restore it from the current root at | |
1690 | * any stack swaps. | |
1691 | */ | |
1692 | ||
1646d37b | 1693 | #ifndef USE_THREADS |
92c2555f | 1694 | scm_t_debug_frame *scm_last_debug_frame; |
1646d37b | 1695 | #endif |
6dbd0af5 MD |
1696 | |
1697 | /* scm_debug_eframe_size is the number of slots available for pseudo | |
1698 | * stack frames at each real stack frame. | |
1699 | */ | |
1700 | ||
c014a02e | 1701 | long scm_debug_eframe_size; |
6dbd0af5 | 1702 | |
b7ff98dd | 1703 | int scm_debug_mode, scm_check_entry_p, scm_check_apply_p, scm_check_exit_p; |
6dbd0af5 | 1704 | |
c014a02e | 1705 | long scm_eval_stack; |
a74145b8 | 1706 | |
92c2555f | 1707 | scm_t_option scm_eval_opts[] = { |
a74145b8 | 1708 | { SCM_OPTION_INTEGER, "stack", 22000, "Size of thread stacks (in machine words)." } |
33b97402 MD |
1709 | }; |
1710 | ||
92c2555f | 1711 | scm_t_option scm_debug_opts[] = { |
b7ff98dd MD |
1712 | { SCM_OPTION_BOOLEAN, "cheap", 1, |
1713 | "*Flyweight representation of the stack at traps." }, | |
1714 | { SCM_OPTION_BOOLEAN, "breakpoints", 0, "*Check for breakpoints." }, | |
1715 | { SCM_OPTION_BOOLEAN, "trace", 0, "*Trace mode." }, | |
1716 | { SCM_OPTION_BOOLEAN, "procnames", 1, | |
1717 | "Record procedure names at definition." }, | |
1718 | { SCM_OPTION_BOOLEAN, "backwards", 0, | |
1719 | "Display backtrace in anti-chronological order." }, | |
274dc5fd | 1720 | { SCM_OPTION_INTEGER, "width", 79, "Maximal width of backtrace." }, |
4e646a03 MD |
1721 | { SCM_OPTION_INTEGER, "indent", 10, "Maximal indentation in backtrace." }, |
1722 | { SCM_OPTION_INTEGER, "frames", 3, | |
b7ff98dd | 1723 | "Maximum number of tail-recursive frames in backtrace." }, |
4e646a03 MD |
1724 | { SCM_OPTION_INTEGER, "maxdepth", 1000, |
1725 | "Maximal number of stored backtrace frames." }, | |
1726 | { SCM_OPTION_INTEGER, "depth", 20, "Maximal length of printed backtrace." }, | |
11f77bfc MD |
1727 | { SCM_OPTION_BOOLEAN, "backtrace", 0, "Show backtrace on error." }, |
1728 | { SCM_OPTION_BOOLEAN, "debug", 0, "Use the debugging evaluator." }, | |
863e833b | 1729 | { SCM_OPTION_INTEGER, "stack", 20000, "Stack size limit (measured in words; 0 = no check)." }, |
d95c0b76 | 1730 | { SCM_OPTION_SCM, "show-file-name", (unsigned long)SCM_BOOL_T, "Show file names and line numbers in backtraces when not `#f'. A value of `base' displays only base names, while `#t' displays full names."} |
6dbd0af5 MD |
1731 | }; |
1732 | ||
92c2555f | 1733 | scm_t_option scm_evaluator_trap_table[] = { |
b6d75948 | 1734 | { SCM_OPTION_BOOLEAN, "traps", 0, "Enable evaluator traps." }, |
b7ff98dd MD |
1735 | { SCM_OPTION_BOOLEAN, "enter-frame", 0, "Trap when eval enters new frame." }, |
1736 | { SCM_OPTION_BOOLEAN, "apply-frame", 0, "Trap when entering apply." }, | |
d95c0b76 NJ |
1737 | { SCM_OPTION_BOOLEAN, "exit-frame", 0, "Trap when exiting eval or apply." }, |
1738 | { SCM_OPTION_SCM, "enter-frame-handler", (unsigned long)SCM_BOOL_F, "Handler for enter-frame traps." }, | |
1739 | { SCM_OPTION_SCM, "apply-frame-handler", (unsigned long)SCM_BOOL_F, "Handler for apply-frame traps." }, | |
1740 | { SCM_OPTION_SCM, "exit-frame-handler", (unsigned long)SCM_BOOL_F, "Handler for exit-frame traps." } | |
6dbd0af5 MD |
1741 | }; |
1742 | ||
a1ec6916 | 1743 | SCM_DEFINE (scm_eval_options_interface, "eval-options-interface", 0, 1, 0, |
1bbd0b84 | 1744 | (SCM setting), |
b3f26b14 MG |
1745 | "Option interface for the evaluation options. Instead of using\n" |
1746 | "this procedure directly, use the procedures @code{eval-enable},\n" | |
1747 | "@code{eval-disable}, @code{eval-set!} and @var{eval-options}.") | |
1bbd0b84 | 1748 | #define FUNC_NAME s_scm_eval_options_interface |
33b97402 MD |
1749 | { |
1750 | SCM ans; | |
1751 | SCM_DEFER_INTS; | |
1752 | ans = scm_options (setting, | |
1753 | scm_eval_opts, | |
1754 | SCM_N_EVAL_OPTIONS, | |
1bbd0b84 | 1755 | FUNC_NAME); |
a74145b8 | 1756 | scm_eval_stack = SCM_EVAL_STACK * sizeof (void *); |
33b97402 MD |
1757 | SCM_ALLOW_INTS; |
1758 | return ans; | |
1759 | } | |
1bbd0b84 | 1760 | #undef FUNC_NAME |
33b97402 | 1761 | |
a1ec6916 | 1762 | SCM_DEFINE (scm_evaluator_traps, "evaluator-traps-interface", 0, 1, 0, |
1bbd0b84 | 1763 | (SCM setting), |
b3f26b14 | 1764 | "Option interface for the evaluator trap options.") |
1bbd0b84 | 1765 | #define FUNC_NAME s_scm_evaluator_traps |
33b97402 MD |
1766 | { |
1767 | SCM ans; | |
1768 | SCM_DEFER_INTS; | |
1769 | ans = scm_options (setting, | |
1770 | scm_evaluator_trap_table, | |
1771 | SCM_N_EVALUATOR_TRAPS, | |
1bbd0b84 | 1772 | FUNC_NAME); |
33b97402 | 1773 | SCM_RESET_DEBUG_MODE; |
bfc69694 | 1774 | SCM_ALLOW_INTS; |
33b97402 MD |
1775 | return ans; |
1776 | } | |
1bbd0b84 | 1777 | #undef FUNC_NAME |
33b97402 | 1778 | |
6dbd0af5 | 1779 | SCM |
6e8d25a6 | 1780 | scm_deval_args (SCM l, SCM env, SCM proc, SCM *lloc) |
0f2d19dd | 1781 | { |
680ed4a8 | 1782 | SCM *results = lloc, res; |
904a077d | 1783 | while (SCM_CONSP (l)) |
0f2d19dd | 1784 | { |
680ed4a8 | 1785 | res = EVALCAR (l, env); |
904a077d | 1786 | |
8ea46249 | 1787 | *lloc = scm_list_1 (res); |
a23afe53 | 1788 | lloc = SCM_CDRLOC (*lloc); |
0f2d19dd JB |
1789 | l = SCM_CDR (l); |
1790 | } | |
cf7c17e9 | 1791 | #ifdef SCM_CAUTIOUS |
22a52da1 | 1792 | if (!SCM_NULLP (l)) |
904a077d | 1793 | scm_wrong_num_args (proc); |
680ed4a8 MD |
1794 | #endif |
1795 | return *results; | |
0f2d19dd JB |
1796 | } |
1797 | ||
6dbd0af5 MD |
1798 | #endif /* !DEVAL */ |
1799 | ||
1800 | ||
1801 | /* SECTION: Some local definitions for the evaluator. | |
1802 | */ | |
1803 | ||
d9d39d76 MV |
1804 | /* Update the toplevel environment frame ENV so that it refers to the |
1805 | current module. | |
1806 | */ | |
1807 | #define UPDATE_TOPLEVEL_ENV(env) \ | |
1808 | do { \ | |
1809 | SCM p = scm_current_module_lookup_closure (); \ | |
1810 | if (p != SCM_CAR(env)) \ | |
1811 | env = scm_top_level_env (p); \ | |
1812 | } while (0) | |
1813 | ||
6dbd0af5 | 1814 | #ifndef DEVAL |
01f11e02 | 1815 | #define CHECK_EQVISH(A,B) (SCM_EQ_P ((A), (B)) || (!SCM_FALSEP (scm_eqv_p ((A), (B))))) |
6dbd0af5 MD |
1816 | #endif /* DEVAL */ |
1817 | ||
399dedcc | 1818 | #define BUILTIN_RPASUBR /* Handle rpsubrs and asubrs without calling apply */ |
6dbd0af5 MD |
1819 | |
1820 | /* SECTION: This is the evaluator. Like any real monster, it has | |
1821 | * three heads. This code is compiled twice. | |
1822 | */ | |
1823 | ||
0f2d19dd | 1824 | #if 0 |
1cc91f1b | 1825 | |
0f2d19dd | 1826 | SCM |
1bbd0b84 | 1827 | scm_ceval (SCM x, SCM env) |
0f2d19dd JB |
1828 | {} |
1829 | #endif | |
1830 | #if 0 | |
1cc91f1b | 1831 | |
0f2d19dd | 1832 | SCM |
1bbd0b84 | 1833 | scm_deval (SCM x, SCM env) |
0f2d19dd JB |
1834 | {} |
1835 | #endif | |
1836 | ||
6dbd0af5 | 1837 | SCM |
1bbd0b84 | 1838 | SCM_CEVAL (SCM x, SCM env) |
0f2d19dd JB |
1839 | { |
1840 | union | |
1841 | { | |
1842 | SCM *lloc; | |
1843 | SCM arg1; | |
f8769b1d | 1844 | } t; |
86d31dfe | 1845 | SCM proc, arg2, orig_sym; |
6dbd0af5 | 1846 | #ifdef DEVAL |
92c2555f MV |
1847 | scm_t_debug_frame debug; |
1848 | scm_t_debug_info *debug_info_end; | |
1646d37b | 1849 | debug.prev = scm_last_debug_frame; |
6dbd0af5 | 1850 | debug.status = scm_debug_eframe_size; |
04b6c081 | 1851 | /* |
92c2555f | 1852 | * The debug.vect contains twice as much scm_t_debug_info frames as the |
04b6c081 MD |
1853 | * user has specified with (debug-set! frames <n>). |
1854 | * | |
1855 | * Even frames are eval frames, odd frames are apply frames. | |
1856 | */ | |
92c2555f | 1857 | debug.vect = (scm_t_debug_info *) alloca (scm_debug_eframe_size |
c0ab1b8d JB |
1858 | * sizeof (debug.vect[0])); |
1859 | debug.info = debug.vect; | |
1860 | debug_info_end = debug.vect + scm_debug_eframe_size; | |
1861 | scm_last_debug_frame = &debug; | |
6dbd0af5 | 1862 | #endif |
b7ff98dd | 1863 | #ifdef EVAL_STACK_CHECKING |
6f13f9cb MD |
1864 | if (scm_stack_checking_enabled_p |
1865 | && SCM_STACK_OVERFLOW_P ((SCM_STACKITEM *) &proc)) | |
6dbd0af5 | 1866 | { |
b7ff98dd | 1867 | #ifdef DEVAL |
6dbd0af5 MD |
1868 | debug.info->e.exp = x; |
1869 | debug.info->e.env = env; | |
b7ff98dd | 1870 | #endif |
6dbd0af5 MD |
1871 | scm_report_stack_overflow (); |
1872 | } | |
1873 | #endif | |
1874 | #ifdef DEVAL | |
1875 | goto start; | |
1876 | #endif | |
1877 | loopnoap: | |
1878 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
1879 | loop: | |
1880 | #ifdef DEVAL | |
b7ff98dd MD |
1881 | SCM_CLEAR_ARGSREADY (debug); |
1882 | if (SCM_OVERFLOWP (debug)) | |
6dbd0af5 | 1883 | --debug.info; |
04b6c081 MD |
1884 | /* |
1885 | * In theory, this should be the only place where it is necessary to | |
1886 | * check for space in debug.vect since both eval frames and | |
1887 | * available space are even. | |
1888 | * | |
1889 | * For this to be the case, however, it is necessary that primitive | |
1890 | * special forms which jump back to `loop', `begin' or some similar | |
1891 | * label call PREP_APPLY. A convenient way to do this is to jump to | |
1892 | * `loopnoap' or `cdrxnoap'. | |
1893 | */ | |
c0ab1b8d | 1894 | else if (++debug.info >= debug_info_end) |
6dbd0af5 | 1895 | { |
b7ff98dd | 1896 | SCM_SET_OVERFLOW (debug); |
6dbd0af5 MD |
1897 | debug.info -= 2; |
1898 | } | |
1899 | start: | |
1900 | debug.info->e.exp = x; | |
1901 | debug.info->e.env = env; | |
b6d75948 | 1902 | if (CHECK_ENTRY && SCM_TRAPS_P) |
b7ff98dd | 1903 | if (SCM_ENTER_FRAME_P || (SCM_BREAKPOINTS_P && SRCBRKP (x))) |
6dbd0af5 | 1904 | { |
156dcb09 | 1905 | SCM tail = SCM_BOOL(SCM_TAILRECP (debug)); |
b7ff98dd | 1906 | SCM_SET_TAILREC (debug); |
b7ff98dd | 1907 | if (SCM_CHEAPTRAPS_P) |
c0ab1b8d | 1908 | t.arg1 = scm_make_debugobj (&debug); |
6dbd0af5 MD |
1909 | else |
1910 | { | |
5f144b10 GH |
1911 | int first; |
1912 | SCM val = scm_make_continuation (&first); | |
1913 | ||
1914 | if (first) | |
1915 | t.arg1 = val; | |
1916 | else | |
6dbd0af5 | 1917 | { |
5f144b10 | 1918 | x = val; |
6dbd0af5 | 1919 | if (SCM_IMP (x)) |
ddea3325 | 1920 | RETURN (x); |
6dbd0af5 MD |
1921 | else |
1922 | /* This gives the possibility for the debugger to | |
1923 | modify the source expression before evaluation. */ | |
1924 | goto dispatch; | |
1925 | } | |
1926 | } | |
d95c0b76 NJ |
1927 | SCM_TRAPS_P = 0; |
1928 | scm_call_4 (SCM_ENTER_FRAME_HDLR, | |
1929 | scm_sym_enter_frame, | |
1930 | t.arg1, | |
1931 | tail, | |
1932 | scm_unmemocopy (x, env)); | |
1933 | SCM_TRAPS_P = 1; | |
6dbd0af5 | 1934 | } |
6dbd0af5 | 1935 | #endif |
e3173f93 | 1936 | #if defined (USE_THREADS) || defined (DEVAL) |
f8769b1d | 1937 | dispatch: |
e3173f93 | 1938 | #endif |
9cb5124f | 1939 | SCM_TICK; |
0f2d19dd JB |
1940 | switch (SCM_TYP7 (x)) |
1941 | { | |
28b06554 | 1942 | case scm_tc7_symbol: |
0f2d19dd JB |
1943 | /* Only happens when called at top level. |
1944 | */ | |
1945 | x = scm_cons (x, SCM_UNDEFINED); | |
ddea3325 | 1946 | RETURN (*scm_lookupcar (x, env, 1)); |
0f2d19dd | 1947 | |
c209c88e | 1948 | case SCM_BIT8(SCM_IM_AND): |
0f2d19dd JB |
1949 | x = SCM_CDR (x); |
1950 | t.arg1 = x; | |
01f11e02 | 1951 | while (!SCM_NULLP (t.arg1 = SCM_CDR (t.arg1))) |
0f2d19dd JB |
1952 | if (SCM_FALSEP (EVALCAR (x, env))) |
1953 | { | |
1954 | RETURN (SCM_BOOL_F); | |
1955 | } | |
1956 | else | |
1957 | x = t.arg1; | |
6dbd0af5 | 1958 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
1959 | goto carloop; |
1960 | ||
c209c88e | 1961 | case SCM_BIT8(SCM_IM_BEGIN): |
b8113bc8 MV |
1962 | if (SCM_NULLP (SCM_CDR (x))) |
1963 | RETURN (SCM_UNSPECIFIED); | |
1964 | ||
d9d39d76 MV |
1965 | /* (currently unused) |
1966 | cdrxnoap: */ | |
6dbd0af5 | 1967 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
d9d39d76 MV |
1968 | /* (currently unused) |
1969 | cdrxbegin: */ | |
0f2d19dd JB |
1970 | x = SCM_CDR (x); |
1971 | ||
1972 | begin: | |
4163eb72 MV |
1973 | /* If we are on toplevel with a lookup closure, we need to sync |
1974 | with the current module. */ | |
22a52da1 | 1975 | if (SCM_CONSP (env) && !SCM_CONSP (SCM_CAR (env))) |
4163eb72 MV |
1976 | { |
1977 | t.arg1 = x; | |
d9d39d76 | 1978 | UPDATE_TOPLEVEL_ENV (env); |
22a52da1 | 1979 | while (!SCM_NULLP (t.arg1 = SCM_CDR (t.arg1))) |
4163eb72 | 1980 | { |
5280aaca | 1981 | EVALCAR (x, env); |
4163eb72 | 1982 | x = t.arg1; |
d9d39d76 | 1983 | UPDATE_TOPLEVEL_ENV (env); |
4163eb72 | 1984 | } |
5280aaca | 1985 | goto carloop; |
4163eb72 MV |
1986 | } |
1987 | else | |
5280aaca MV |
1988 | goto nontoplevel_begin; |
1989 | ||
1990 | nontoplevel_cdrxnoap: | |
1991 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
1992 | nontoplevel_cdrxbegin: | |
1993 | x = SCM_CDR (x); | |
1994 | nontoplevel_begin: | |
1995 | t.arg1 = x; | |
22a52da1 | 1996 | while (!SCM_NULLP (t.arg1 = SCM_CDR (t.arg1))) |
0f2d19dd | 1997 | { |
5280aaca | 1998 | if (SCM_IMP (SCM_CAR (x))) |
26d5b9b4 | 1999 | { |
5280aaca | 2000 | if (SCM_ISYMP (SCM_CAR (x))) |
26d5b9b4 | 2001 | { |
5280aaca MV |
2002 | x = scm_m_expand_body (x, env); |
2003 | goto nontoplevel_begin; | |
26d5b9b4 | 2004 | } |
4163eb72 | 2005 | else |
17fa3fcf | 2006 | SCM_VALIDATE_NON_EMPTY_COMBINATION (SCM_CAR (x)); |
26d5b9b4 | 2007 | } |
5280aaca MV |
2008 | else |
2009 | SCM_CEVAL (SCM_CAR (x), env); | |
2010 | x = t.arg1; | |
0f2d19dd | 2011 | } |
5280aaca | 2012 | |
0f2d19dd | 2013 | carloop: /* scm_eval car of last form in list */ |
8c494e99 | 2014 | if (SCM_IMP (SCM_CAR (x))) |
0f2d19dd JB |
2015 | { |
2016 | x = SCM_CAR (x); | |
ddea3325 | 2017 | RETURN (SCM_EVALIM (x, env)); |
0f2d19dd JB |
2018 | } |
2019 | ||
2020 | if (SCM_SYMBOLP (SCM_CAR (x))) | |
ddea3325 | 2021 | RETURN (*scm_lookupcar (x, env, 1)); |
0f2d19dd JB |
2022 | |
2023 | x = SCM_CAR (x); | |
2024 | goto loop; /* tail recurse */ | |
2025 | ||
2026 | ||
c209c88e | 2027 | case SCM_BIT8(SCM_IM_CASE): |
0f2d19dd JB |
2028 | x = SCM_CDR (x); |
2029 | t.arg1 = EVALCAR (x, env); | |
2030 | while (SCM_NIMP (x = SCM_CDR (x))) | |
2031 | { | |
2032 | proc = SCM_CAR (x); | |
cf498326 | 2033 | if (SCM_EQ_P (scm_sym_else, SCM_CAR (proc))) |
0f2d19dd JB |
2034 | { |
2035 | x = SCM_CDR (proc); | |
6dbd0af5 | 2036 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
2037 | goto begin; |
2038 | } | |
2039 | proc = SCM_CAR (proc); | |
2040 | while (SCM_NIMP (proc)) | |
2041 | { | |
2042 | if (CHECK_EQVISH (SCM_CAR (proc), t.arg1)) | |
2043 | { | |
8ea46249 | 2044 | x = SCM_CDAR (x); |
6dbd0af5 | 2045 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
2046 | goto begin; |
2047 | } | |
2048 | proc = SCM_CDR (proc); | |
2049 | } | |
2050 | } | |
ddea3325 | 2051 | RETURN (SCM_UNSPECIFIED); |
0f2d19dd JB |
2052 | |
2053 | ||
8ea46249 DH |
2054 | case SCM_BIT8 (SCM_IM_COND): |
2055 | x = SCM_CDR (x); | |
2056 | while (!SCM_NULLP (x)) | |
0f2d19dd JB |
2057 | { |
2058 | proc = SCM_CAR (x); | |
8ea46249 DH |
2059 | if (SCM_EQ_P (SCM_CAR (proc), scm_sym_else)) |
2060 | { | |
2061 | x = SCM_CDR (proc); | |
2062 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2063 | goto begin; | |
2064 | } | |
0f2d19dd | 2065 | t.arg1 = EVALCAR (proc, env); |
01f11e02 | 2066 | if (!SCM_FALSEP (t.arg1)) |
0f2d19dd JB |
2067 | { |
2068 | x = SCM_CDR (proc); | |
22a52da1 | 2069 | if (SCM_NULLP (x)) |
ddea3325 | 2070 | RETURN (t.arg1); |
22a52da1 | 2071 | if (!SCM_EQ_P (scm_sym_arrow, SCM_CAR (x))) |
6dbd0af5 MD |
2072 | { |
2073 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2074 | goto begin; | |
2075 | } | |
0f2d19dd JB |
2076 | proc = SCM_CDR (x); |
2077 | proc = EVALCAR (proc, env); | |
2078 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
8ea46249 | 2079 | PREP_APPLY (proc, scm_list_1 (t.arg1)); |
6dbd0af5 | 2080 | ENTER_APPLY; |
a820af98 | 2081 | if (SCM_CLOSUREP(proc) && scm_badformalsp (proc, 1)) |
e37a4fba | 2082 | goto umwrongnumargs; |
0f2d19dd JB |
2083 | goto evap1; |
2084 | } | |
8ea46249 | 2085 | x = SCM_CDR (x); |
0f2d19dd | 2086 | } |
ddea3325 | 2087 | RETURN (SCM_UNSPECIFIED); |
0f2d19dd JB |
2088 | |
2089 | ||
c209c88e | 2090 | case SCM_BIT8(SCM_IM_DO): |
0f2d19dd | 2091 | x = SCM_CDR (x); |
8ea46249 | 2092 | proc = SCM_CADR (x); /* inits */ |
0f2d19dd JB |
2093 | t.arg1 = SCM_EOL; /* values */ |
2094 | while (SCM_NIMP (proc)) | |
2095 | { | |
2096 | t.arg1 = scm_cons (EVALCAR (proc, env), t.arg1); | |
2097 | proc = SCM_CDR (proc); | |
2098 | } | |
e2806c10 | 2099 | env = EXTEND_ENV (SCM_CAR (x), t.arg1, env); |
8ea46249 | 2100 | x = SCM_CDDR (x); |
0f2d19dd JB |
2101 | while (proc = SCM_CAR (x), SCM_FALSEP (EVALCAR (proc, env))) |
2102 | { | |
f3d2630a | 2103 | for (proc = SCM_CADR (x); SCM_NIMP (proc); proc = SCM_CDR (proc)) |
0f2d19dd JB |
2104 | { |
2105 | t.arg1 = SCM_CAR (proc); /* body */ | |
2106 | SIDEVAL (t.arg1, env); | |
2107 | } | |
f3d2630a MD |
2108 | for (t.arg1 = SCM_EOL, proc = SCM_CDDR (x); |
2109 | SCM_NIMP (proc); | |
2110 | proc = SCM_CDR (proc)) | |
0f2d19dd | 2111 | t.arg1 = scm_cons (EVALCAR (proc, env), t.arg1); /* steps */ |
8ea46249 | 2112 | env = EXTEND_ENV (SCM_CAAR (env), t.arg1, SCM_CDR (env)); |
0f2d19dd JB |
2113 | } |
2114 | x = SCM_CDR (proc); | |
2115 | if (SCM_NULLP (x)) | |
6dbd0af5 MD |
2116 | RETURN (SCM_UNSPECIFIED); |
2117 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
5280aaca | 2118 | goto nontoplevel_begin; |
0f2d19dd JB |
2119 | |
2120 | ||
c209c88e | 2121 | case SCM_BIT8(SCM_IM_IF): |
0f2d19dd | 2122 | x = SCM_CDR (x); |
01f11e02 | 2123 | if (!SCM_FALSEP (EVALCAR (x, env))) |
0f2d19dd | 2124 | x = SCM_CDR (x); |
8ea46249 | 2125 | else if (SCM_IMP (x = SCM_CDDR (x))) |
ddea3325 | 2126 | RETURN (SCM_UNSPECIFIED); |
6dbd0af5 | 2127 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
2128 | goto carloop; |
2129 | ||
2130 | ||
c209c88e | 2131 | case SCM_BIT8(SCM_IM_LET): |
0f2d19dd | 2132 | x = SCM_CDR (x); |
8ea46249 | 2133 | proc = SCM_CADR (x); |
0f2d19dd JB |
2134 | t.arg1 = SCM_EOL; |
2135 | do | |
2136 | { | |
2137 | t.arg1 = scm_cons (EVALCAR (proc, env), t.arg1); | |
2138 | } | |
2139 | while (SCM_NIMP (proc = SCM_CDR (proc))); | |
e2806c10 | 2140 | env = EXTEND_ENV (SCM_CAR (x), t.arg1, env); |
0f2d19dd | 2141 | x = SCM_CDR (x); |
5280aaca | 2142 | goto nontoplevel_cdrxnoap; |
0f2d19dd JB |
2143 | |
2144 | ||
c209c88e | 2145 | case SCM_BIT8(SCM_IM_LETREC): |
0f2d19dd | 2146 | x = SCM_CDR (x); |
e2806c10 | 2147 | env = EXTEND_ENV (SCM_CAR (x), scm_undefineds, env); |
0f2d19dd JB |
2148 | x = SCM_CDR (x); |
2149 | proc = SCM_CAR (x); | |
2150 | t.arg1 = SCM_EOL; | |
2151 | do | |
2152 | { | |
2153 | t.arg1 = scm_cons (EVALCAR (proc, env), t.arg1); | |
2154 | } | |
2155 | while (SCM_NIMP (proc = SCM_CDR (proc))); | |
a23afe53 | 2156 | SCM_SETCDR (SCM_CAR (env), t.arg1); |
5280aaca | 2157 | goto nontoplevel_cdrxnoap; |
0f2d19dd JB |
2158 | |
2159 | ||
c209c88e | 2160 | case SCM_BIT8(SCM_IM_LETSTAR): |
0f2d19dd JB |
2161 | x = SCM_CDR (x); |
2162 | proc = SCM_CAR (x); | |
2163 | if (SCM_IMP (proc)) | |
2164 | { | |
e2806c10 | 2165 | env = EXTEND_ENV (SCM_EOL, SCM_EOL, env); |
5280aaca | 2166 | goto nontoplevel_cdrxnoap; |
0f2d19dd JB |
2167 | } |
2168 | do | |
2169 | { | |
2170 | t.arg1 = SCM_CAR (proc); | |
2171 | proc = SCM_CDR (proc); | |
e2806c10 | 2172 | env = EXTEND_ENV (t.arg1, EVALCAR (proc, env), env); |
0f2d19dd JB |
2173 | } |
2174 | while (SCM_NIMP (proc = SCM_CDR (proc))); | |
5280aaca | 2175 | goto nontoplevel_cdrxnoap; |
0f2d19dd | 2176 | |
c209c88e | 2177 | case SCM_BIT8(SCM_IM_OR): |
0f2d19dd JB |
2178 | x = SCM_CDR (x); |
2179 | t.arg1 = x; | |
22a52da1 | 2180 | while (!SCM_NULLP (t.arg1 = SCM_CDR (t.arg1))) |
0f2d19dd JB |
2181 | { |
2182 | x = EVALCAR (x, env); | |
22a52da1 | 2183 | if (!SCM_FALSEP (x)) |
0f2d19dd JB |
2184 | { |
2185 | RETURN (x); | |
2186 | } | |
2187 | x = t.arg1; | |
2188 | } | |
6dbd0af5 | 2189 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
2190 | goto carloop; |
2191 | ||
2192 | ||
c209c88e | 2193 | case SCM_BIT8(SCM_IM_LAMBDA): |
0f2d19dd JB |
2194 | RETURN (scm_closure (SCM_CDR (x), env)); |
2195 | ||
2196 | ||
c209c88e | 2197 | case SCM_BIT8(SCM_IM_QUOTE): |
8ea46249 | 2198 | RETURN (SCM_CADR (x)); |
0f2d19dd JB |
2199 | |
2200 | ||
c209c88e | 2201 | case SCM_BIT8(SCM_IM_SET_X): |
0f2d19dd JB |
2202 | x = SCM_CDR (x); |
2203 | proc = SCM_CAR (x); | |
3201d763 | 2204 | switch (SCM_ITAG3 (proc)) |
0f2d19dd | 2205 | { |
3201d763 | 2206 | case scm_tc3_cons: |
d22a0ea1 MV |
2207 | if (SCM_VARIABLEP (proc)) |
2208 | t.lloc = SCM_VARIABLE_LOC (proc); | |
2209 | else | |
2210 | t.lloc = scm_lookupcar (x, env, 1); | |
0f2d19dd | 2211 | break; |
0f2d19dd | 2212 | #ifdef MEMOIZE_LOCALS |
3201d763 | 2213 | case scm_tc3_imm24: |
0f2d19dd JB |
2214 | t.lloc = scm_ilookup (proc, env); |
2215 | break; | |
2216 | #endif | |
2217 | } | |
2218 | x = SCM_CDR (x); | |
2219 | *t.lloc = EVALCAR (x, env); | |
0f2d19dd JB |
2220 | #ifdef SICP |
2221 | RETURN (*t.lloc); | |
2222 | #else | |
2223 | RETURN (SCM_UNSPECIFIED); | |
2224 | #endif | |
2225 | ||
2226 | ||
c209c88e | 2227 | case SCM_BIT8(SCM_IM_DEFINE): /* only for internal defines */ |
26d5b9b4 MD |
2228 | scm_misc_error (NULL, "Bad define placement", SCM_EOL); |
2229 | ||
0f2d19dd | 2230 | /* new syntactic forms go here. */ |
c209c88e | 2231 | case SCM_BIT8(SCM_MAKISYM (0)): |
0f2d19dd JB |
2232 | proc = SCM_CAR (x); |
2233 | SCM_ASRTGO (SCM_ISYMP (proc), badfun); | |
2234 | switch SCM_ISYMNUM (proc) | |
2235 | { | |
0f2d19dd JB |
2236 | case (SCM_ISYMNUM (SCM_IM_APPLY)): |
2237 | proc = SCM_CDR (x); | |
2238 | proc = EVALCAR (proc, env); | |
2239 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
2240 | if (SCM_CLOSUREP (proc)) | |
2241 | { | |
1609038c | 2242 | SCM argl, tl; |
6dbd0af5 | 2243 | PREP_APPLY (proc, SCM_EOL); |
8ea46249 | 2244 | t.arg1 = SCM_CDDR (x); |
0f2d19dd | 2245 | t.arg1 = EVALCAR (t.arg1, env); |
a513ead3 MV |
2246 | apply_closure: |
2247 | /* Go here to tail-call a closure. PROC is the closure | |
2248 | and T.ARG1 is the list of arguments. Do not forget to | |
2249 | call PREP_APPLY. */ | |
6dbd0af5 MD |
2250 | #ifdef DEVAL |
2251 | debug.info->a.args = t.arg1; | |
2252 | #endif | |
cf7c17e9 | 2253 | #ifndef SCM_RECKLESS |
726d810a | 2254 | if (scm_badargsp (SCM_CLOSURE_FORMALS (proc), t.arg1)) |
0f2d19dd JB |
2255 | goto wrongnumargs; |
2256 | #endif | |
c79450dd | 2257 | ENTER_APPLY; |
1609038c MD |
2258 | /* Copy argument list */ |
2259 | if (SCM_IMP (t.arg1)) | |
2260 | argl = t.arg1; | |
2261 | else | |
2262 | { | |
2263 | argl = tl = scm_cons (SCM_CAR (t.arg1), SCM_UNSPECIFIED); | |
2264 | while (SCM_NIMP (t.arg1 = SCM_CDR (t.arg1)) | |
2265 | && SCM_CONSP (t.arg1)) | |
2266 | { | |
2267 | SCM_SETCDR (tl, scm_cons (SCM_CAR (t.arg1), | |
2268 | SCM_UNSPECIFIED)); | |
2269 | tl = SCM_CDR (tl); | |
2270 | } | |
2271 | SCM_SETCDR (tl, t.arg1); | |
2272 | } | |
2273 | ||
726d810a | 2274 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), argl, SCM_ENV (proc)); |
0f2d19dd | 2275 | x = SCM_CODE (proc); |
5280aaca | 2276 | goto nontoplevel_cdrxbegin; |
0f2d19dd | 2277 | } |
81123e6d | 2278 | proc = scm_f_apply; |
0f2d19dd JB |
2279 | goto evapply; |
2280 | ||
2281 | case (SCM_ISYMNUM (SCM_IM_CONT)): | |
5f144b10 GH |
2282 | { |
2283 | int first; | |
2284 | SCM val = scm_make_continuation (&first); | |
2285 | ||
2286 | if (first) | |
2287 | t.arg1 = val; | |
2288 | else | |
2289 | RETURN (val); | |
2290 | } | |
0f2d19dd JB |
2291 | proc = SCM_CDR (x); |
2292 | proc = evalcar (proc, env); | |
2293 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
8ea46249 | 2294 | PREP_APPLY (proc, scm_list_1 (t.arg1)); |
6dbd0af5 | 2295 | ENTER_APPLY; |
a820af98 | 2296 | if (SCM_CLOSUREP(proc) && scm_badformalsp (proc, 1)) |
e37a4fba | 2297 | goto umwrongnumargs; |
0f2d19dd JB |
2298 | goto evap1; |
2299 | ||
a570e93a | 2300 | case (SCM_ISYMNUM (SCM_IM_DELAY)): |
ddea3325 | 2301 | RETURN (scm_makprom (scm_closure (SCM_CDR (x), env))); |
a570e93a | 2302 | |
89efbff4 | 2303 | case (SCM_ISYMNUM (SCM_IM_DISPATCH)): |
195847fa MD |
2304 | proc = SCM_CADR (x); /* unevaluated operands */ |
2305 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2306 | if (SCM_IMP (proc)) | |
2307 | arg2 = *scm_ilookup (proc, env); | |
01f11e02 | 2308 | else if (!SCM_CONSP (proc)) |
195847fa | 2309 | { |
904a077d MV |
2310 | if (SCM_VARIABLEP (proc)) |
2311 | arg2 = SCM_VARIABLE_REF (proc); | |
195847fa MD |
2312 | else |
2313 | arg2 = *scm_lookupcar (SCM_CDR (x), env, 1); | |
2314 | } | |
2315 | else | |
2316 | { | |
8ea46249 | 2317 | arg2 = scm_list_1 (EVALCAR (proc, env)); |
195847fa MD |
2318 | t.lloc = SCM_CDRLOC (arg2); |
2319 | while (SCM_NIMP (proc = SCM_CDR (proc))) | |
2320 | { | |
8ea46249 | 2321 | *t.lloc = scm_list_1 (EVALCAR (proc, env)); |
195847fa MD |
2322 | t.lloc = SCM_CDRLOC (*t.lloc); |
2323 | } | |
2324 | } | |
2325 | ||
2326 | type_dispatch: | |
61364ba6 MD |
2327 | /* The type dispatch code is duplicated here |
2328 | * (c.f. objects.c:scm_mcache_compute_cmethod) since that | |
2329 | * cuts down execution time for type dispatch to 50%. | |
2330 | */ | |
2331 | { | |
c014a02e | 2332 | long i, n, end, mask; |
61364ba6 MD |
2333 | SCM z = SCM_CDDR (x); |
2334 | n = SCM_INUM (SCM_CAR (z)); /* maximum number of specializers */ | |
2335 | proc = SCM_CADR (z); | |
2336 | ||
2337 | if (SCM_NIMP (proc)) | |
2338 | { | |
2339 | /* Prepare for linear search */ | |
2340 | mask = -1; | |
2341 | i = 0; | |
b5c2579a | 2342 | end = SCM_VECTOR_LENGTH (proc); |
61364ba6 MD |
2343 | } |
2344 | else | |
2345 | { | |
2346 | /* Compute a hash value */ | |
c014a02e ML |
2347 | long hashset = SCM_INUM (proc); |
2348 | long j = n; | |
729dbac3 DH |
2349 | z = SCM_CDDR (z); |
2350 | mask = SCM_INUM (SCM_CAR (z)); | |
61364ba6 MD |
2351 | proc = SCM_CADR (z); |
2352 | i = 0; | |
2353 | t.arg1 = arg2; | |
2354 | if (SCM_NIMP (t.arg1)) | |
2355 | do | |
2356 | { | |
d8c40b9f DH |
2357 | i += SCM_STRUCT_DATA (scm_class_of (SCM_CAR (t.arg1))) |
2358 | [scm_si_hashsets + hashset]; | |
61364ba6 MD |
2359 | t.arg1 = SCM_CDR (t.arg1); |
2360 | } | |
4ea6a431 | 2361 | while (j-- && SCM_NIMP (t.arg1)); |
61364ba6 MD |
2362 | i &= mask; |
2363 | end = i; | |
2364 | } | |
2365 | ||
2366 | /* Search for match */ | |
2367 | do | |
2368 | { | |
c014a02e | 2369 | long j = n; |
61364ba6 MD |
2370 | z = SCM_VELTS (proc)[i]; |
2371 | t.arg1 = arg2; /* list of arguments */ | |
2372 | if (SCM_NIMP (t.arg1)) | |
2373 | do | |
2374 | { | |
2375 | /* More arguments than specifiers => CLASS != ENV */ | |
cf498326 | 2376 | if (! SCM_EQ_P (scm_class_of (SCM_CAR (t.arg1)), SCM_CAR (z))) |
61364ba6 MD |
2377 | goto next_method; |
2378 | t.arg1 = SCM_CDR (t.arg1); | |
2379 | z = SCM_CDR (z); | |
2380 | } | |
4ea6a431 | 2381 | while (j-- && SCM_NIMP (t.arg1)); |
61364ba6 MD |
2382 | /* Fewer arguments than specifiers => CAR != ENV */ |
2383 | if (!(SCM_IMP (SCM_CAR (z)) || SCM_CONSP (SCM_CAR (z)))) | |
2384 | goto next_method; | |
2385 | apply_cmethod: | |
2386 | env = EXTEND_ENV (SCM_CAR (SCM_CMETHOD_CODE (z)), | |
2387 | arg2, | |
2388 | SCM_CMETHOD_ENV (z)); | |
2389 | x = SCM_CMETHOD_CODE (z); | |
5280aaca | 2390 | goto nontoplevel_cdrxbegin; |
61364ba6 MD |
2391 | next_method: |
2392 | i = (i + 1) & mask; | |
2393 | } while (i != end); | |
2394 | ||
2395 | z = scm_memoize_method (x, arg2); | |
2396 | goto apply_cmethod; | |
2397 | } | |
73b64342 | 2398 | |
ca4be6ea MD |
2399 | case (SCM_ISYMNUM (SCM_IM_SLOT_REF)): |
2400 | x = SCM_CDR (x); | |
2401 | t.arg1 = EVALCAR (x, env); | |
ddea3325 | 2402 | RETURN (SCM_PACK (SCM_STRUCT_DATA (t.arg1) [SCM_INUM (SCM_CADR (x))])); |
ca4be6ea MD |
2403 | |
2404 | case (SCM_ISYMNUM (SCM_IM_SLOT_SET_X)): | |
2405 | x = SCM_CDR (x); | |
2406 | t.arg1 = EVALCAR (x, env); | |
2407 | x = SCM_CDR (x); | |
2408 | proc = SCM_CDR (x); | |
d8c40b9f DH |
2409 | SCM_STRUCT_DATA (t.arg1) [SCM_INUM (SCM_CAR (x))] |
2410 | = SCM_UNPACK (EVALCAR (proc, env)); | |
ddea3325 | 2411 | RETURN (SCM_UNSPECIFIED); |
ca4be6ea | 2412 | |
73b64342 MD |
2413 | case (SCM_ISYMNUM (SCM_IM_NIL_COND)): |
2414 | proc = SCM_CDR (x); | |
2415 | while (SCM_NIMP (x = SCM_CDR (proc))) | |
2416 | { | |
2417 | if (!(SCM_FALSEP (t.arg1 = EVALCAR (proc, env)) | |
3201d763 | 2418 | || SCM_EQ_P (t.arg1, scm_lisp_nil))) |
73b64342 | 2419 | { |
cf498326 | 2420 | if (SCM_EQ_P (SCM_CAR (x), SCM_UNSPECIFIED)) |
73b64342 MD |
2421 | RETURN (t.arg1); |
2422 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2423 | goto carloop; | |
2424 | } | |
2425 | proc = SCM_CDR (x); | |
2426 | } | |
2427 | x = proc; | |
2428 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2429 | goto carloop; | |
2430 | ||
2431 | case (SCM_ISYMNUM (SCM_IM_NIL_IFY)): | |
2432 | x = SCM_CDR (x); | |
2433 | RETURN ((SCM_FALSEP (proc = EVALCAR (x, env)) || SCM_NULLP (proc)) | |
ddea3325 DH |
2434 | ? scm_lisp_nil |
2435 | : proc); | |
73b64342 MD |
2436 | |
2437 | case (SCM_ISYMNUM (SCM_IM_T_IFY)): | |
2438 | x = SCM_CDR (x); | |
ddea3325 | 2439 | RETURN (!SCM_FALSEP (EVALCAR (x, env)) ? scm_lisp_t : scm_lisp_nil); |
73b64342 MD |
2440 | |
2441 | case (SCM_ISYMNUM (SCM_IM_0_COND)): | |
2442 | proc = SCM_CDR (x); | |
2443 | while (SCM_NIMP (x = SCM_CDR (proc))) | |
2444 | { | |
2445 | if (!(SCM_FALSEP (t.arg1 = EVALCAR (proc, env)) | |
3201d763 | 2446 | || SCM_EQ_P (t.arg1, SCM_INUM0))) |
73b64342 | 2447 | { |
cf498326 | 2448 | if (SCM_EQ_P (SCM_CAR (x), SCM_UNSPECIFIED)) |
73b64342 MD |
2449 | RETURN (t.arg1); |
2450 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2451 | goto carloop; | |
2452 | } | |
2453 | proc = SCM_CDR (x); | |
2454 | } | |
2455 | x = proc; | |
2456 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2457 | goto carloop; | |
2458 | ||
2459 | case (SCM_ISYMNUM (SCM_IM_0_IFY)): | |
2460 | x = SCM_CDR (x); | |
2461 | RETURN (SCM_FALSEP (proc = EVALCAR (x, env)) | |
2462 | ? SCM_INUM0 | |
ddea3325 | 2463 | : proc); |
73b64342 MD |
2464 | |
2465 | case (SCM_ISYMNUM (SCM_IM_1_IFY)): | |
2466 | x = SCM_CDR (x); | |
01f11e02 | 2467 | RETURN (!SCM_FALSEP (EVALCAR (x, env)) |
73b64342 | 2468 | ? SCM_MAKINUM (1) |
ddea3325 | 2469 | : SCM_INUM0); |
73b64342 MD |
2470 | |
2471 | case (SCM_ISYMNUM (SCM_IM_BIND)): | |
2e171178 MV |
2472 | { |
2473 | SCM vars, exps, vals; | |
73b64342 | 2474 | |
2e171178 MV |
2475 | x = SCM_CDR (x); |
2476 | vars = SCM_CAAR (x); | |
2477 | exps = SCM_CDAR (x); | |
2478 | ||
2479 | vals = SCM_EOL; | |
2480 | ||
2481 | while (SCM_NIMP (exps)) | |
2482 | { | |
2483 | vals = scm_cons (EVALCAR (exps, env), vals); | |
2484 | exps = SCM_CDR (exps); | |
2485 | } | |
2486 | ||
2487 | scm_swap_bindings (vars, vals); | |
2488 | scm_dynwinds = scm_acons (vars, vals, scm_dynwinds); | |
89efbff4 | 2489 | |
2e171178 MV |
2490 | arg2 = x = SCM_CDR (x); |
2491 | while (!SCM_NULLP (arg2 = SCM_CDR (arg2))) | |
2492 | { | |
2493 | SIDEVAL (SCM_CAR (x), env); | |
2494 | x = arg2; | |
2495 | } | |
2496 | proc = EVALCAR (x, env); | |
73b64342 | 2497 | |
2e171178 MV |
2498 | scm_dynwinds = SCM_CDR (scm_dynwinds); |
2499 | scm_swap_bindings (vars, vals); | |
73b64342 | 2500 | |
ddea3325 | 2501 | RETURN (proc); |
2e171178 | 2502 | } |
73b64342 | 2503 | |
a513ead3 MV |
2504 | case (SCM_ISYMNUM (SCM_IM_CALL_WITH_VALUES)): |
2505 | { | |
2506 | proc = SCM_CDR (x); | |
2507 | x = EVALCAR (proc, env); | |
2508 | proc = SCM_CDR (proc); | |
2509 | proc = EVALCAR (proc, env); | |
2510 | t.arg1 = SCM_APPLY (x, SCM_EOL, SCM_EOL); | |
2511 | if (SCM_VALUESP (t.arg1)) | |
2512 | t.arg1 = scm_struct_ref (t.arg1, SCM_INUM0); | |
2513 | else | |
8ea46249 | 2514 | t.arg1 = scm_list_1 (t.arg1); |
a513ead3 MV |
2515 | if (SCM_CLOSUREP (proc)) |
2516 | { | |
2517 | PREP_APPLY (proc, t.arg1); | |
2518 | goto apply_closure; | |
2519 | } | |
2520 | return SCM_APPLY (proc, t.arg1, SCM_EOL); | |
2521 | } | |
2522 | ||
0f2d19dd JB |
2523 | default: |
2524 | goto badfun; | |
2525 | } | |
2526 | ||
2527 | default: | |
2528 | proc = x; | |
2529 | badfun: | |
f5bf2977 | 2530 | /* scm_everr (x, env,...) */ |
1afff620 | 2531 | scm_misc_error (NULL, "Wrong type to apply: ~S", scm_list_1 (proc)); |
0f2d19dd JB |
2532 | case scm_tc7_vector: |
2533 | case scm_tc7_wvect: | |
afe5177e | 2534 | #ifdef HAVE_ARRAYS |
0f2d19dd JB |
2535 | case scm_tc7_bvect: |
2536 | case scm_tc7_byvect: | |
2537 | case scm_tc7_svect: | |
2538 | case scm_tc7_ivect: | |
2539 | case scm_tc7_uvect: | |
2540 | case scm_tc7_fvect: | |
2541 | case scm_tc7_dvect: | |
2542 | case scm_tc7_cvect: | |
5c11cc9d | 2543 | #ifdef HAVE_LONG_LONGS |
0f2d19dd | 2544 | case scm_tc7_llvect: |
afe5177e | 2545 | #endif |
0f2d19dd JB |
2546 | #endif |
2547 | case scm_tc7_string: | |
0f2d19dd JB |
2548 | case scm_tc7_smob: |
2549 | case scm_tcs_closures: | |
224822be | 2550 | case scm_tc7_cclo: |
89efbff4 | 2551 | case scm_tc7_pws: |
0f2d19dd | 2552 | case scm_tcs_subrs: |
904a077d | 2553 | case scm_tcs_struct: |
0f2d19dd JB |
2554 | RETURN (x); |
2555 | ||
d22a0ea1 | 2556 | case scm_tc7_variable: |
a130e982 | 2557 | RETURN (SCM_VARIABLE_REF(x)); |
d22a0ea1 | 2558 | |
0f2d19dd | 2559 | #ifdef MEMOIZE_LOCALS |
c209c88e | 2560 | case SCM_BIT8(SCM_ILOC00): |
0f2d19dd JB |
2561 | proc = *scm_ilookup (SCM_CAR (x), env); |
2562 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
cf7c17e9 JB |
2563 | #ifndef SCM_RECKLESS |
2564 | #ifdef SCM_CAUTIOUS | |
0f2d19dd JB |
2565 | goto checkargs; |
2566 | #endif | |
2567 | #endif | |
2568 | break; | |
2569 | #endif /* ifdef MEMOIZE_LOCALS */ | |
d22a0ea1 | 2570 | |
0f2d19dd | 2571 | case scm_tcs_cons_nimcar: |
86d31dfe MV |
2572 | orig_sym = SCM_CAR (x); |
2573 | if (SCM_SYMBOLP (orig_sym)) | |
0f2d19dd | 2574 | { |
f8769b1d | 2575 | #ifdef USE_THREADS |
26d5b9b4 | 2576 | t.lloc = scm_lookupcar1 (x, env, 1); |
f8769b1d MV |
2577 | if (t.lloc == NULL) |
2578 | { | |
2579 | /* we have lost the race, start again. */ | |
2580 | goto dispatch; | |
2581 | } | |
2582 | proc = *t.lloc; | |
2583 | #else | |
26d5b9b4 | 2584 | proc = *scm_lookupcar (x, env, 1); |
f8769b1d MV |
2585 | #endif |
2586 | ||
0f2d19dd JB |
2587 | if (SCM_IMP (proc)) |
2588 | { | |
86d31dfe MV |
2589 | SCM_SETCAR (x, orig_sym); /* Undo memoizing effect of |
2590 | lookupcar */ | |
0f2d19dd JB |
2591 | goto badfun; |
2592 | } | |
22a52da1 | 2593 | if (SCM_MACROP (proc)) |
0f2d19dd | 2594 | { |
86d31dfe MV |
2595 | SCM_SETCAR (x, orig_sym); /* Undo memoizing effect of |
2596 | lookupcar */ | |
0f2d19dd | 2597 | handle_a_macro: |
368bf056 | 2598 | #ifdef DEVAL |
7c354052 MD |
2599 | /* Set a flag during macro expansion so that macro |
2600 | application frames can be deleted from the backtrace. */ | |
2601 | SCM_SET_MACROEXP (debug); | |
368bf056 | 2602 | #endif |
22a52da1 | 2603 | t.arg1 = SCM_APPLY (SCM_MACRO_CODE (proc), x, |
f8769b1d MV |
2604 | scm_cons (env, scm_listofnull)); |
2605 | ||
7c354052 MD |
2606 | #ifdef DEVAL |
2607 | SCM_CLEAR_MACROEXP (debug); | |
2608 | #endif | |
22a52da1 | 2609 | switch (SCM_MACRO_TYPE (proc)) |
0f2d19dd JB |
2610 | { |
2611 | case 2: | |
2612 | if (scm_ilength (t.arg1) <= 0) | |
8ea46249 | 2613 | t.arg1 = scm_list_2 (SCM_IM_BEGIN, t.arg1); |
6dbd0af5 | 2614 | #ifdef DEVAL |
22a52da1 | 2615 | if (!SCM_CLOSUREP (SCM_MACRO_CODE (proc))) |
6dbd0af5 | 2616 | { |
6dbd0af5 | 2617 | SCM_DEFER_INTS; |
a23afe53 MD |
2618 | SCM_SETCAR (x, SCM_CAR (t.arg1)); |
2619 | SCM_SETCDR (x, SCM_CDR (t.arg1)); | |
6dbd0af5 MD |
2620 | SCM_ALLOW_INTS; |
2621 | goto dispatch; | |
2622 | } | |
2623 | /* Prevent memoizing of debug info expression. */ | |
6203706f MD |
2624 | debug.info->e.exp = scm_cons_source (debug.info->e.exp, |
2625 | SCM_CAR (x), | |
2626 | SCM_CDR (x)); | |
6dbd0af5 | 2627 | #endif |
0f2d19dd | 2628 | SCM_DEFER_INTS; |
a23afe53 MD |
2629 | SCM_SETCAR (x, SCM_CAR (t.arg1)); |
2630 | SCM_SETCDR (x, SCM_CDR (t.arg1)); | |
0f2d19dd | 2631 | SCM_ALLOW_INTS; |
6dbd0af5 | 2632 | goto loopnoap; |
0f2d19dd JB |
2633 | case 1: |
2634 | if (SCM_NIMP (x = t.arg1)) | |
6dbd0af5 | 2635 | goto loopnoap; |
0f2d19dd JB |
2636 | case 0: |
2637 | RETURN (t.arg1); | |
2638 | } | |
2639 | } | |
2640 | } | |
2641 | else | |
2642 | proc = SCM_CEVAL (SCM_CAR (x), env); | |
22a52da1 | 2643 | SCM_ASRTGO (!SCM_IMP (proc), badfun); |
cf7c17e9 JB |
2644 | #ifndef SCM_RECKLESS |
2645 | #ifdef SCM_CAUTIOUS | |
0f2d19dd JB |
2646 | checkargs: |
2647 | #endif | |
2648 | if (SCM_CLOSUREP (proc)) | |
2649 | { | |
726d810a | 2650 | arg2 = SCM_CLOSURE_FORMALS (proc); |
0f2d19dd | 2651 | t.arg1 = SCM_CDR (x); |
726d810a | 2652 | while (!SCM_NULLP (arg2)) |
0f2d19dd | 2653 | { |
22a52da1 | 2654 | if (!SCM_CONSP (arg2)) |
0f2d19dd JB |
2655 | goto evapply; |
2656 | if (SCM_IMP (t.arg1)) | |
2657 | goto umwrongnumargs; | |
2658 | arg2 = SCM_CDR (arg2); | |
2659 | t.arg1 = SCM_CDR (t.arg1); | |
2660 | } | |
22a52da1 | 2661 | if (!SCM_NULLP (t.arg1)) |
0f2d19dd JB |
2662 | goto umwrongnumargs; |
2663 | } | |
22a52da1 | 2664 | else if (SCM_MACROP (proc)) |
0f2d19dd JB |
2665 | goto handle_a_macro; |
2666 | #endif | |
2667 | } | |
2668 | ||
2669 | ||
6dbd0af5 MD |
2670 | evapply: |
2671 | PREP_APPLY (proc, SCM_EOL); | |
2672 | if (SCM_NULLP (SCM_CDR (x))) { | |
2673 | ENTER_APPLY; | |
89efbff4 | 2674 | evap0: |
0f2d19dd JB |
2675 | switch (SCM_TYP7 (proc)) |
2676 | { /* no arguments given */ | |
2677 | case scm_tc7_subr_0: | |
2678 | RETURN (SCM_SUBRF (proc) ()); | |
2679 | case scm_tc7_subr_1o: | |
2680 | RETURN (SCM_SUBRF (proc) (SCM_UNDEFINED)); | |
2681 | case scm_tc7_lsubr: | |
2682 | RETURN (SCM_SUBRF (proc) (SCM_EOL)); | |
2683 | case scm_tc7_rpsubr: | |
2684 | RETURN (SCM_BOOL_T); | |
2685 | case scm_tc7_asubr: | |
2686 | RETURN (SCM_SUBRF (proc) (SCM_UNDEFINED, SCM_UNDEFINED)); | |
0717dfd8 | 2687 | case scm_tc7_smob: |
68b06924 | 2688 | if (!SCM_SMOB_APPLICABLE_P (proc)) |
0717dfd8 | 2689 | goto badfun; |
68b06924 | 2690 | RETURN (SCM_SMOB_APPLY_0 (proc)); |
0f2d19dd JB |
2691 | case scm_tc7_cclo: |
2692 | t.arg1 = proc; | |
2693 | proc = SCM_CCLO_SUBR (proc); | |
6dbd0af5 MD |
2694 | #ifdef DEVAL |
2695 | debug.info->a.proc = proc; | |
8ea46249 | 2696 | debug.info->a.args = scm_list_1 (t.arg1); |
6dbd0af5 | 2697 | #endif |
0f2d19dd | 2698 | goto evap1; |
89efbff4 MD |
2699 | case scm_tc7_pws: |
2700 | proc = SCM_PROCEDURE (proc); | |
2701 | #ifdef DEVAL | |
2702 | debug.info->a.proc = proc; | |
2703 | #endif | |
002f1a5d MD |
2704 | if (!SCM_CLOSUREP (proc)) |
2705 | goto evap0; | |
2706 | if (scm_badformalsp (proc, 0)) | |
2707 | goto umwrongnumargs; | |
0f2d19dd JB |
2708 | case scm_tcs_closures: |
2709 | x = SCM_CODE (proc); | |
726d810a | 2710 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), SCM_EOL, SCM_ENV (proc)); |
5280aaca | 2711 | goto nontoplevel_cdrxbegin; |
904a077d | 2712 | case scm_tcs_struct: |
195847fa MD |
2713 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) |
2714 | { | |
2715 | x = SCM_ENTITY_PROCEDURE (proc); | |
2716 | arg2 = SCM_EOL; | |
2717 | goto type_dispatch; | |
2718 | } | |
2719 | else if (!SCM_I_OPERATORP (proc)) | |
9b07e212 MD |
2720 | goto badfun; |
2721 | else | |
da7f71d7 | 2722 | { |
195847fa MD |
2723 | t.arg1 = proc; |
2724 | proc = (SCM_I_ENTITYP (proc) | |
2725 | ? SCM_ENTITY_PROCEDURE (proc) | |
2726 | : SCM_OPERATOR_PROCEDURE (proc)); | |
da7f71d7 | 2727 | #ifdef DEVAL |
195847fa | 2728 | debug.info->a.proc = proc; |
8ea46249 | 2729 | debug.info->a.args = scm_list_1 (t.arg1); |
da7f71d7 | 2730 | #endif |
195847fa MD |
2731 | if (SCM_NIMP (proc)) |
2732 | goto evap1; | |
2733 | else | |
2734 | goto badfun; | |
da7f71d7 | 2735 | } |
0f2d19dd JB |
2736 | case scm_tc7_subr_1: |
2737 | case scm_tc7_subr_2: | |
2738 | case scm_tc7_subr_2o: | |
2739 | case scm_tc7_cxr: | |
2740 | case scm_tc7_subr_3: | |
2741 | case scm_tc7_lsubr_2: | |
2742 | umwrongnumargs: | |
2743 | unmemocar (x, env); | |
2744 | wrongnumargs: | |
f5bf2977 GH |
2745 | /* scm_everr (x, env,...) */ |
2746 | scm_wrong_num_args (proc); | |
0f2d19dd JB |
2747 | default: |
2748 | /* handle macros here */ | |
2749 | goto badfun; | |
2750 | } | |
6dbd0af5 | 2751 | } |
0f2d19dd JB |
2752 | |
2753 | /* must handle macros by here */ | |
2754 | x = SCM_CDR (x); | |
cf7c17e9 | 2755 | #ifdef SCM_CAUTIOUS |
0f2d19dd JB |
2756 | if (SCM_IMP (x)) |
2757 | goto wrongnumargs; | |
680ed4a8 MD |
2758 | else if (SCM_CONSP (x)) |
2759 | { | |
2760 | if (SCM_IMP (SCM_CAR (x))) | |
6cb702da | 2761 | t.arg1 = SCM_EVALIM (SCM_CAR (x), env); |
680ed4a8 MD |
2762 | else |
2763 | t.arg1 = EVALCELLCAR (x, env); | |
2764 | } | |
680ed4a8 MD |
2765 | else |
2766 | goto wrongnumargs; | |
2767 | #else | |
0f2d19dd | 2768 | t.arg1 = EVALCAR (x, env); |
680ed4a8 | 2769 | #endif |
6dbd0af5 | 2770 | #ifdef DEVAL |
8ea46249 | 2771 | debug.info->a.args = scm_list_1 (t.arg1); |
6dbd0af5 | 2772 | #endif |
0f2d19dd JB |
2773 | x = SCM_CDR (x); |
2774 | if (SCM_NULLP (x)) | |
2775 | { | |
6dbd0af5 | 2776 | ENTER_APPLY; |
0f2d19dd JB |
2777 | evap1: |
2778 | switch (SCM_TYP7 (proc)) | |
6dbd0af5 | 2779 | { /* have one argument in t.arg1 */ |
0f2d19dd JB |
2780 | case scm_tc7_subr_2o: |
2781 | RETURN (SCM_SUBRF (proc) (t.arg1, SCM_UNDEFINED)); | |
2782 | case scm_tc7_subr_1: | |
2783 | case scm_tc7_subr_1o: | |
2784 | RETURN (SCM_SUBRF (proc) (t.arg1)); | |
2785 | case scm_tc7_cxr: | |
0f2d19dd JB |
2786 | if (SCM_SUBRF (proc)) |
2787 | { | |
2788 | if (SCM_INUMP (t.arg1)) | |
2789 | { | |
f8de44c1 | 2790 | RETURN (scm_make_real (SCM_DSUBRF (proc) ((double) SCM_INUM (t.arg1)))); |
0f2d19dd | 2791 | } |
01f11e02 | 2792 | else if (SCM_REALP (t.arg1)) |
0f2d19dd | 2793 | { |
eb42e2f0 | 2794 | RETURN (scm_make_real (SCM_DSUBRF (proc) (SCM_REAL_VALUE (t.arg1)))); |
0f2d19dd JB |
2795 | } |
2796 | #ifdef SCM_BIGDIG | |
01f11e02 | 2797 | else if (SCM_BIGP (t.arg1)) |
0f2d19dd | 2798 | { |
1be6b49c | 2799 | RETURN (scm_make_real (SCM_DSUBRF (proc) (scm_i_big2dbl (t.arg1)))); |
0f2d19dd JB |
2800 | } |
2801 | #endif | |
9de33deb | 2802 | SCM_WTA_DISPATCH_1 (*SCM_SUBR_GENERIC (proc), t.arg1, |
3db4adfc | 2803 | SCM_ARG1, SCM_SYMBOL_CHARS (SCM_SNAME (proc))); |
0f2d19dd | 2804 | } |
3201d763 | 2805 | proc = SCM_SNAME (proc); |
0f2d19dd | 2806 | { |
b5c2579a | 2807 | char *chrs = SCM_SYMBOL_CHARS (proc) + SCM_SYMBOL_LENGTH (proc) - 1; |
0f2d19dd JB |
2808 | while ('c' != *--chrs) |
2809 | { | |
0c95b57d | 2810 | SCM_ASSERT (SCM_CONSP (t.arg1), |
3db4adfc | 2811 | t.arg1, SCM_ARG1, SCM_SYMBOL_CHARS (proc)); |
0f2d19dd JB |
2812 | t.arg1 = ('a' == *chrs) ? SCM_CAR (t.arg1) : SCM_CDR (t.arg1); |
2813 | } | |
2814 | RETURN (t.arg1); | |
2815 | } | |
2816 | case scm_tc7_rpsubr: | |
2817 | RETURN (SCM_BOOL_T); | |
2818 | case scm_tc7_asubr: | |
2819 | RETURN (SCM_SUBRF (proc) (t.arg1, SCM_UNDEFINED)); | |
2820 | case scm_tc7_lsubr: | |
2821 | #ifdef DEVAL | |
ddea3325 | 2822 | RETURN (SCM_SUBRF (proc) (debug.info->a.args)); |
0f2d19dd | 2823 | #else |
8ea46249 | 2824 | RETURN (SCM_SUBRF (proc) (scm_list_1 (t.arg1))); |
0f2d19dd | 2825 | #endif |
0717dfd8 | 2826 | case scm_tc7_smob: |
68b06924 | 2827 | if (!SCM_SMOB_APPLICABLE_P (proc)) |
0717dfd8 | 2828 | goto badfun; |
68b06924 | 2829 | RETURN (SCM_SMOB_APPLY_1 (proc, t.arg1)); |
0f2d19dd JB |
2830 | case scm_tc7_cclo: |
2831 | arg2 = t.arg1; | |
2832 | t.arg1 = proc; | |
2833 | proc = SCM_CCLO_SUBR (proc); | |
6dbd0af5 MD |
2834 | #ifdef DEVAL |
2835 | debug.info->a.args = scm_cons (t.arg1, debug.info->a.args); | |
2836 | debug.info->a.proc = proc; | |
2837 | #endif | |
0f2d19dd | 2838 | goto evap2; |
89efbff4 MD |
2839 | case scm_tc7_pws: |
2840 | proc = SCM_PROCEDURE (proc); | |
2841 | #ifdef DEVAL | |
2842 | debug.info->a.proc = proc; | |
2843 | #endif | |
002f1a5d MD |
2844 | if (!SCM_CLOSUREP (proc)) |
2845 | goto evap1; | |
2846 | if (scm_badformalsp (proc, 1)) | |
2847 | goto umwrongnumargs; | |
0f2d19dd | 2848 | case scm_tcs_closures: |
195847fa | 2849 | /* clos1: */ |
0f2d19dd JB |
2850 | x = SCM_CODE (proc); |
2851 | #ifdef DEVAL | |
726d810a | 2852 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), debug.info->a.args, SCM_ENV (proc)); |
0f2d19dd | 2853 | #else |
8ea46249 | 2854 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), scm_list_1 (t.arg1), SCM_ENV (proc)); |
0f2d19dd | 2855 | #endif |
5280aaca | 2856 | goto nontoplevel_cdrxbegin; |
904a077d | 2857 | case scm_tcs_struct: |
f3d2630a MD |
2858 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) |
2859 | { | |
195847fa | 2860 | x = SCM_ENTITY_PROCEDURE (proc); |
f3d2630a MD |
2861 | #ifdef DEVAL |
2862 | arg2 = debug.info->a.args; | |
2863 | #else | |
8ea46249 | 2864 | arg2 = scm_list_1 (t.arg1); |
f3d2630a | 2865 | #endif |
f3d2630a MD |
2866 | goto type_dispatch; |
2867 | } | |
2868 | else if (!SCM_I_OPERATORP (proc)) | |
9b07e212 MD |
2869 | goto badfun; |
2870 | else | |
0c32d76c | 2871 | { |
195847fa MD |
2872 | arg2 = t.arg1; |
2873 | t.arg1 = proc; | |
2874 | proc = (SCM_I_ENTITYP (proc) | |
2875 | ? SCM_ENTITY_PROCEDURE (proc) | |
2876 | : SCM_OPERATOR_PROCEDURE (proc)); | |
0c32d76c | 2877 | #ifdef DEVAL |
195847fa MD |
2878 | debug.info->a.args = scm_cons (t.arg1, debug.info->a.args); |
2879 | debug.info->a.proc = proc; | |
0c32d76c | 2880 | #endif |
195847fa MD |
2881 | if (SCM_NIMP (proc)) |
2882 | goto evap2; | |
2883 | else | |
2884 | goto badfun; | |
0c32d76c | 2885 | } |
0f2d19dd JB |
2886 | case scm_tc7_subr_2: |
2887 | case scm_tc7_subr_0: | |
2888 | case scm_tc7_subr_3: | |
2889 | case scm_tc7_lsubr_2: | |
2890 | goto wrongnumargs; | |
2891 | default: | |
2892 | goto badfun; | |
2893 | } | |
2894 | } | |
cf7c17e9 | 2895 | #ifdef SCM_CAUTIOUS |
0f2d19dd JB |
2896 | if (SCM_IMP (x)) |
2897 | goto wrongnumargs; | |
680ed4a8 MD |
2898 | else if (SCM_CONSP (x)) |
2899 | { | |
2900 | if (SCM_IMP (SCM_CAR (x))) | |
6cb702da | 2901 | arg2 = SCM_EVALIM (SCM_CAR (x), env); |
680ed4a8 MD |
2902 | else |
2903 | arg2 = EVALCELLCAR (x, env); | |
2904 | } | |
680ed4a8 MD |
2905 | else |
2906 | goto wrongnumargs; | |
2907 | #else | |
2908 | arg2 = EVALCAR (x, env); | |
0f2d19dd JB |
2909 | #endif |
2910 | { /* have two or more arguments */ | |
6dbd0af5 | 2911 | #ifdef DEVAL |
8ea46249 | 2912 | debug.info->a.args = scm_list_2 (t.arg1, arg2); |
6dbd0af5 | 2913 | #endif |
0f2d19dd JB |
2914 | x = SCM_CDR (x); |
2915 | if (SCM_NULLP (x)) { | |
6dbd0af5 | 2916 | ENTER_APPLY; |
0f2d19dd | 2917 | evap2: |
6dbd0af5 MD |
2918 | switch (SCM_TYP7 (proc)) |
2919 | { /* have two arguments */ | |
2920 | case scm_tc7_subr_2: | |
2921 | case scm_tc7_subr_2o: | |
2922 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2)); | |
2923 | case scm_tc7_lsubr: | |
0f2d19dd | 2924 | #ifdef DEVAL |
ddea3325 | 2925 | RETURN (SCM_SUBRF (proc) (debug.info->a.args)); |
6dbd0af5 | 2926 | #else |
8ea46249 | 2927 | RETURN (SCM_SUBRF (proc) (scm_list_2 (t.arg1, arg2))); |
0f2d19dd | 2928 | #endif |
6dbd0af5 MD |
2929 | case scm_tc7_lsubr_2: |
2930 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, SCM_EOL)); | |
2931 | case scm_tc7_rpsubr: | |
2932 | case scm_tc7_asubr: | |
2933 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2)); | |
0717dfd8 | 2934 | case scm_tc7_smob: |
68b06924 | 2935 | if (!SCM_SMOB_APPLICABLE_P (proc)) |
0717dfd8 | 2936 | goto badfun; |
68b06924 | 2937 | RETURN (SCM_SMOB_APPLY_2 (proc, t.arg1, arg2)); |
6dbd0af5 MD |
2938 | cclon: |
2939 | case scm_tc7_cclo: | |
0f2d19dd | 2940 | #ifdef DEVAL |
195847fa MD |
2941 | RETURN (SCM_APPLY (SCM_CCLO_SUBR (proc), |
2942 | scm_cons (proc, debug.info->a.args), | |
2943 | SCM_EOL)); | |
0f2d19dd | 2944 | #else |
195847fa MD |
2945 | RETURN (SCM_APPLY (SCM_CCLO_SUBR (proc), |
2946 | scm_cons2 (proc, t.arg1, | |
2947 | scm_cons (arg2, | |
2948 | scm_eval_args (x, | |
2949 | env, | |
2950 | proc))), | |
2951 | SCM_EOL)); | |
6dbd0af5 | 2952 | #endif |
904a077d | 2953 | case scm_tcs_struct: |
f3d2630a MD |
2954 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) |
2955 | { | |
195847fa | 2956 | x = SCM_ENTITY_PROCEDURE (proc); |
f3d2630a MD |
2957 | #ifdef DEVAL |
2958 | arg2 = debug.info->a.args; | |
2959 | #else | |
8ea46249 | 2960 | arg2 = scm_list_2 (t.arg1, arg2); |
f3d2630a | 2961 | #endif |
f3d2630a MD |
2962 | goto type_dispatch; |
2963 | } | |
2964 | else if (!SCM_I_OPERATORP (proc)) | |
9b07e212 MD |
2965 | goto badfun; |
2966 | else | |
0c32d76c | 2967 | { |
195847fa | 2968 | operatorn: |
0c32d76c | 2969 | #ifdef DEVAL |
195847fa MD |
2970 | RETURN (SCM_APPLY (SCM_I_ENTITYP (proc) |
2971 | ? SCM_ENTITY_PROCEDURE (proc) | |
2972 | : SCM_OPERATOR_PROCEDURE (proc), | |
2973 | scm_cons (proc, debug.info->a.args), | |
2974 | SCM_EOL)); | |
2975 | #else | |
2976 | RETURN (SCM_APPLY (SCM_I_ENTITYP (proc) | |
2977 | ? SCM_ENTITY_PROCEDURE (proc) | |
2978 | : SCM_OPERATOR_PROCEDURE (proc), | |
2979 | scm_cons2 (proc, t.arg1, | |
2980 | scm_cons (arg2, | |
2981 | scm_eval_args (x, | |
2982 | env, | |
2983 | proc))), | |
2984 | SCM_EOL)); | |
2985 | #endif | |
0c32d76c | 2986 | } |
6dbd0af5 MD |
2987 | case scm_tc7_subr_0: |
2988 | case scm_tc7_cxr: | |
2989 | case scm_tc7_subr_1o: | |
2990 | case scm_tc7_subr_1: | |
2991 | case scm_tc7_subr_3: | |
6dbd0af5 MD |
2992 | goto wrongnumargs; |
2993 | default: | |
2994 | goto badfun; | |
002f1a5d MD |
2995 | case scm_tc7_pws: |
2996 | proc = SCM_PROCEDURE (proc); | |
2997 | #ifdef DEVAL | |
2998 | debug.info->a.proc = proc; | |
2999 | #endif | |
3000 | if (!SCM_CLOSUREP (proc)) | |
3001 | goto evap2; | |
3002 | if (scm_badformalsp (proc, 2)) | |
3003 | goto umwrongnumargs; | |
6dbd0af5 | 3004 | case scm_tcs_closures: |
195847fa | 3005 | /* clos2: */ |
0f2d19dd | 3006 | #ifdef DEVAL |
726d810a | 3007 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), |
da7f71d7 MD |
3008 | debug.info->a.args, |
3009 | SCM_ENV (proc)); | |
0f2d19dd | 3010 | #else |
726d810a | 3011 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), |
8ea46249 | 3012 | scm_list_2 (t.arg1, arg2), SCM_ENV (proc)); |
0f2d19dd | 3013 | #endif |
6dbd0af5 | 3014 | x = SCM_CODE (proc); |
5280aaca | 3015 | goto nontoplevel_cdrxbegin; |
6dbd0af5 | 3016 | } |
0f2d19dd | 3017 | } |
cf7c17e9 | 3018 | #ifdef SCM_CAUTIOUS |
01f11e02 | 3019 | if (SCM_IMP (x) || !SCM_CONSP (x)) |
680ed4a8 MD |
3020 | goto wrongnumargs; |
3021 | #endif | |
0f2d19dd | 3022 | #ifdef DEVAL |
6dbd0af5 | 3023 | debug.info->a.args = scm_cons2 (t.arg1, arg2, |
680ed4a8 MD |
3024 | scm_deval_args (x, env, proc, |
3025 | SCM_CDRLOC (SCM_CDR (debug.info->a.args)))); | |
0f2d19dd | 3026 | #endif |
6dbd0af5 | 3027 | ENTER_APPLY; |
89efbff4 | 3028 | evap3: |
6dbd0af5 MD |
3029 | switch (SCM_TYP7 (proc)) |
3030 | { /* have 3 or more arguments */ | |
0f2d19dd | 3031 | #ifdef DEVAL |
6dbd0af5 MD |
3032 | case scm_tc7_subr_3: |
3033 | SCM_ASRTGO (SCM_NULLP (SCM_CDR (x)), wrongnumargs); | |
da7f71d7 MD |
3034 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, |
3035 | SCM_CADDR (debug.info->a.args))); | |
6dbd0af5 | 3036 | case scm_tc7_asubr: |
399dedcc MD |
3037 | #ifdef BUILTIN_RPASUBR |
3038 | t.arg1 = SCM_SUBRF(proc)(t.arg1, arg2); | |
8ea46249 | 3039 | arg2 = SCM_CDDR (debug.info->a.args); |
da7f71d7 MD |
3040 | do |
3041 | { | |
3042 | t.arg1 = SCM_SUBRF(proc)(t.arg1, SCM_CAR (arg2)); | |
3043 | arg2 = SCM_CDR (arg2); | |
3044 | } | |
3045 | while (SCM_NIMP (arg2)); | |
ddea3325 | 3046 | RETURN (t.arg1); |
399dedcc | 3047 | #endif /* BUILTIN_RPASUBR */ |
6dbd0af5 | 3048 | case scm_tc7_rpsubr: |
71d3aa6d MD |
3049 | #ifdef BUILTIN_RPASUBR |
3050 | if (SCM_FALSEP (SCM_SUBRF (proc) (t.arg1, arg2))) | |
ddea3325 | 3051 | RETURN (SCM_BOOL_F); |
8ea46249 | 3052 | t.arg1 = SCM_CDDR (debug.info->a.args); |
da7f71d7 MD |
3053 | do |
3054 | { | |
3055 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg2, SCM_CAR (t.arg1)))) | |
ddea3325 DH |
3056 | RETURN (SCM_BOOL_F); |
3057 | arg2 = SCM_CAR (t.arg1); | |
da7f71d7 MD |
3058 | t.arg1 = SCM_CDR (t.arg1); |
3059 | } | |
3060 | while (SCM_NIMP (t.arg1)); | |
ddea3325 | 3061 | RETURN (SCM_BOOL_T); |
71d3aa6d | 3062 | #else /* BUILTIN_RPASUBR */ |
da7f71d7 MD |
3063 | RETURN (SCM_APPLY (proc, t.arg1, |
3064 | scm_acons (arg2, | |
8ea46249 | 3065 | SCM_CDDR (debug.info->a.args), |
ddea3325 | 3066 | SCM_EOL))); |
71d3aa6d | 3067 | #endif /* BUILTIN_RPASUBR */ |
399dedcc | 3068 | case scm_tc7_lsubr_2: |
da7f71d7 | 3069 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, |
ddea3325 | 3070 | SCM_CDDR (debug.info->a.args))); |
399dedcc | 3071 | case scm_tc7_lsubr: |
ddea3325 | 3072 | RETURN (SCM_SUBRF (proc) (debug.info->a.args)); |
0717dfd8 | 3073 | case scm_tc7_smob: |
68b06924 | 3074 | if (!SCM_SMOB_APPLICABLE_P (proc)) |
0717dfd8 | 3075 | goto badfun; |
68b06924 KN |
3076 | RETURN (SCM_SMOB_APPLY_3 (proc, t.arg1, arg2, |
3077 | SCM_CDDR (debug.info->a.args))); | |
6dbd0af5 MD |
3078 | case scm_tc7_cclo: |
3079 | goto cclon; | |
89efbff4 MD |
3080 | case scm_tc7_pws: |
3081 | proc = SCM_PROCEDURE (proc); | |
3082 | debug.info->a.proc = proc; | |
002f1a5d MD |
3083 | if (!SCM_CLOSUREP (proc)) |
3084 | goto evap3; | |
726d810a | 3085 | if (scm_badargsp (SCM_CLOSURE_FORMALS (proc), debug.info->a.args)) |
002f1a5d | 3086 | goto umwrongnumargs; |
6dbd0af5 | 3087 | case scm_tcs_closures: |
b7ff98dd | 3088 | SCM_SET_ARGSREADY (debug); |
726d810a | 3089 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), |
6dbd0af5 MD |
3090 | debug.info->a.args, |
3091 | SCM_ENV (proc)); | |
3092 | x = SCM_CODE (proc); | |
5280aaca | 3093 | goto nontoplevel_cdrxbegin; |
6dbd0af5 MD |
3094 | #else /* DEVAL */ |
3095 | case scm_tc7_subr_3: | |
3096 | SCM_ASRTGO (SCM_NULLP (SCM_CDR (x)), wrongnumargs); | |
3097 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, EVALCAR (x, env))); | |
3098 | case scm_tc7_asubr: | |
399dedcc | 3099 | #ifdef BUILTIN_RPASUBR |
da7f71d7 MD |
3100 | t.arg1 = SCM_SUBRF (proc) (t.arg1, arg2); |
3101 | do | |
3102 | { | |
3103 | t.arg1 = SCM_SUBRF(proc)(t.arg1, EVALCAR(x, env)); | |
3104 | x = SCM_CDR(x); | |
3105 | } | |
3106 | while (SCM_NIMP (x)); | |
ddea3325 | 3107 | RETURN (t.arg1); |
399dedcc | 3108 | #endif /* BUILTIN_RPASUBR */ |
6dbd0af5 | 3109 | case scm_tc7_rpsubr: |
71d3aa6d MD |
3110 | #ifdef BUILTIN_RPASUBR |
3111 | if (SCM_FALSEP (SCM_SUBRF (proc) (t.arg1, arg2))) | |
ddea3325 | 3112 | RETURN (SCM_BOOL_F); |
da7f71d7 MD |
3113 | do |
3114 | { | |
3115 | t.arg1 = EVALCAR (x, env); | |
3116 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg2, t.arg1))) | |
ddea3325 DH |
3117 | RETURN (SCM_BOOL_F); |
3118 | arg2 = t.arg1; | |
da7f71d7 MD |
3119 | x = SCM_CDR (x); |
3120 | } | |
3121 | while (SCM_NIMP (x)); | |
ddea3325 | 3122 | RETURN (SCM_BOOL_T); |
71d3aa6d | 3123 | #else /* BUILTIN_RPASUBR */ |
da7f71d7 | 3124 | RETURN (SCM_APPLY (proc, t.arg1, |
680ed4a8 MD |
3125 | scm_acons (arg2, |
3126 | scm_eval_args (x, env, proc), | |
3127 | SCM_EOL))); | |
71d3aa6d | 3128 | #endif /* BUILTIN_RPASUBR */ |
6dbd0af5 | 3129 | case scm_tc7_lsubr_2: |
680ed4a8 | 3130 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, scm_eval_args (x, env, proc))); |
6dbd0af5 | 3131 | case scm_tc7_lsubr: |
680ed4a8 MD |
3132 | RETURN (SCM_SUBRF (proc) (scm_cons2 (t.arg1, |
3133 | arg2, | |
3134 | scm_eval_args (x, env, proc)))); | |
0717dfd8 | 3135 | case scm_tc7_smob: |
68b06924 | 3136 | if (!SCM_SMOB_APPLICABLE_P (proc)) |
0717dfd8 | 3137 | goto badfun; |
68b06924 KN |
3138 | RETURN (SCM_SMOB_APPLY_3 (proc, t.arg1, arg2, |
3139 | scm_eval_args (x, env, proc))); | |
6dbd0af5 MD |
3140 | case scm_tc7_cclo: |
3141 | goto cclon; | |
89efbff4 MD |
3142 | case scm_tc7_pws: |
3143 | proc = SCM_PROCEDURE (proc); | |
002f1a5d MD |
3144 | if (!SCM_CLOSUREP (proc)) |
3145 | goto evap3; | |
3146 | { | |
726d810a | 3147 | SCM formals = SCM_CLOSURE_FORMALS (proc); |
002f1a5d MD |
3148 | if (SCM_NULLP (formals) |
3149 | || (SCM_CONSP (formals) | |
3150 | && (SCM_NULLP (SCM_CDR (formals)) | |
3151 | || (SCM_CONSP (SCM_CDR (formals)) | |
3152 | && scm_badargsp (SCM_CDDR (formals), x))))) | |
3153 | goto umwrongnumargs; | |
3154 | } | |
6dbd0af5 MD |
3155 | case scm_tcs_closures: |
3156 | #ifdef DEVAL | |
b7ff98dd | 3157 | SCM_SET_ARGSREADY (debug); |
6dbd0af5 | 3158 | #endif |
726d810a | 3159 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), |
680ed4a8 MD |
3160 | scm_cons2 (t.arg1, |
3161 | arg2, | |
3162 | scm_eval_args (x, env, proc)), | |
6dbd0af5 MD |
3163 | SCM_ENV (proc)); |
3164 | x = SCM_CODE (proc); | |
5280aaca | 3165 | goto nontoplevel_cdrxbegin; |
0f2d19dd | 3166 | #endif /* DEVAL */ |
904a077d | 3167 | case scm_tcs_struct: |
f3d2630a MD |
3168 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) |
3169 | { | |
3170 | #ifdef DEVAL | |
3171 | arg2 = debug.info->a.args; | |
3172 | #else | |
3173 | arg2 = scm_cons2 (t.arg1, arg2, scm_eval_args (x, env, proc)); | |
3174 | #endif | |
195847fa | 3175 | x = SCM_ENTITY_PROCEDURE (proc); |
f3d2630a MD |
3176 | goto type_dispatch; |
3177 | } | |
3178 | else if (!SCM_I_OPERATORP (proc)) | |
9b07e212 MD |
3179 | goto badfun; |
3180 | else | |
195847fa | 3181 | goto operatorn; |
6dbd0af5 MD |
3182 | case scm_tc7_subr_2: |
3183 | case scm_tc7_subr_1o: | |
3184 | case scm_tc7_subr_2o: | |
3185 | case scm_tc7_subr_0: | |
3186 | case scm_tc7_cxr: | |
3187 | case scm_tc7_subr_1: | |
6dbd0af5 MD |
3188 | goto wrongnumargs; |
3189 | default: | |
3190 | goto badfun; | |
3191 | } | |
0f2d19dd JB |
3192 | } |
3193 | #ifdef DEVAL | |
6dbd0af5 | 3194 | exit: |
b6d75948 | 3195 | if (CHECK_EXIT && SCM_TRAPS_P) |
b7ff98dd | 3196 | if (SCM_EXIT_FRAME_P || (SCM_TRACE_P && SCM_TRACED_FRAME_P (debug))) |
6dbd0af5 | 3197 | { |
b7ff98dd MD |
3198 | SCM_CLEAR_TRACED_FRAME (debug); |
3199 | if (SCM_CHEAPTRAPS_P) | |
c0ab1b8d | 3200 | t.arg1 = scm_make_debugobj (&debug); |
6dbd0af5 MD |
3201 | else |
3202 | { | |
5f144b10 GH |
3203 | int first; |
3204 | SCM val = scm_make_continuation (&first); | |
3205 | ||
3206 | if (first) | |
3207 | t.arg1 = val; | |
3208 | else | |
6dbd0af5 | 3209 | { |
5f144b10 | 3210 | proc = val; |
6dbd0af5 MD |
3211 | goto ret; |
3212 | } | |
3213 | } | |
d95c0b76 NJ |
3214 | SCM_TRAPS_P = 0; |
3215 | scm_call_3 (SCM_EXIT_FRAME_HDLR, scm_sym_exit_frame, t.arg1, proc); | |
3216 | SCM_TRAPS_P = 1; | |
6dbd0af5 MD |
3217 | } |
3218 | ret: | |
1646d37b | 3219 | scm_last_debug_frame = debug.prev; |
0f2d19dd JB |
3220 | return proc; |
3221 | #endif | |
3222 | } | |
3223 | ||
6dbd0af5 MD |
3224 | |
3225 | /* SECTION: This code is compiled once. | |
3226 | */ | |
3227 | ||
0f2d19dd JB |
3228 | #ifndef DEVAL |
3229 | ||
fdc28395 KN |
3230 | \f |
3231 | /* Simple procedure calls | |
3232 | */ | |
3233 | ||
3234 | SCM | |
3235 | scm_call_0 (SCM proc) | |
3236 | { | |
3237 | return scm_apply (proc, SCM_EOL, SCM_EOL); | |
3238 | } | |
3239 | ||
3240 | SCM | |
3241 | scm_call_1 (SCM proc, SCM arg1) | |
3242 | { | |
3243 | return scm_apply (proc, arg1, scm_listofnull); | |
3244 | } | |
3245 | ||
3246 | SCM | |
3247 | scm_call_2 (SCM proc, SCM arg1, SCM arg2) | |
3248 | { | |
3249 | return scm_apply (proc, arg1, scm_cons (arg2, scm_listofnull)); | |
3250 | } | |
3251 | ||
3252 | SCM | |
3253 | scm_call_3 (SCM proc, SCM arg1, SCM arg2, SCM arg3) | |
3254 | { | |
3255 | return scm_apply (proc, arg1, scm_cons2 (arg2, arg3, scm_listofnull)); | |
3256 | } | |
3257 | ||
d95c0b76 NJ |
3258 | SCM |
3259 | scm_call_4 (SCM proc, SCM arg1, SCM arg2, SCM arg3, SCM arg4) | |
3260 | { | |
3261 | return scm_apply (proc, arg1, scm_cons2 (arg2, arg3, | |
3262 | scm_cons (arg4, scm_listofnull))); | |
3263 | } | |
3264 | ||
fdc28395 KN |
3265 | /* Simple procedure applies |
3266 | */ | |
3267 | ||
3268 | SCM | |
3269 | scm_apply_0 (SCM proc, SCM args) | |
3270 | { | |
3271 | return scm_apply (proc, args, SCM_EOL); | |
3272 | } | |
3273 | ||
3274 | SCM | |
3275 | scm_apply_1 (SCM proc, SCM arg1, SCM args) | |
3276 | { | |
3277 | return scm_apply (proc, scm_cons (arg1, args), SCM_EOL); | |
3278 | } | |
3279 | ||
3280 | SCM | |
3281 | scm_apply_2 (SCM proc, SCM arg1, SCM arg2, SCM args) | |
3282 | { | |
3283 | return scm_apply (proc, scm_cons2 (arg1, arg2, args), SCM_EOL); | |
3284 | } | |
3285 | ||
3286 | SCM | |
3287 | scm_apply_3 (SCM proc, SCM arg1, SCM arg2, SCM arg3, SCM args) | |
3288 | { | |
3289 | return scm_apply (proc, scm_cons (arg1, scm_cons2 (arg2, arg3, args)), | |
3290 | SCM_EOL); | |
3291 | } | |
3292 | ||
82a2622a | 3293 | /* This code processes the arguments to apply: |
b145c172 JB |
3294 | |
3295 | (apply PROC ARG1 ... ARGS) | |
3296 | ||
82a2622a JB |
3297 | Given a list (ARG1 ... ARGS), this function conses the ARG1 |
3298 | ... arguments onto the front of ARGS, and returns the resulting | |
3299 | list. Note that ARGS is a list; thus, the argument to this | |
3300 | function is a list whose last element is a list. | |
3301 | ||
3302 | Apply calls this function, and applies PROC to the elements of the | |
b145c172 JB |
3303 | result. apply:nconc2last takes care of building the list of |
3304 | arguments, given (ARG1 ... ARGS). | |
3305 | ||
82a2622a JB |
3306 | Rather than do new consing, apply:nconc2last destroys its argument. |
3307 | On that topic, this code came into my care with the following | |
3308 | beautifully cryptic comment on that topic: "This will only screw | |
3309 | you if you do (scm_apply scm_apply '( ... ))" If you know what | |
3310 | they're referring to, send me a patch to this comment. */ | |
b145c172 | 3311 | |
3b3b36dd | 3312 | SCM_DEFINE (scm_nconc2last, "apply:nconc2last", 1, 0, 0, |
b3f26b14 MG |
3313 | (SCM lst), |
3314 | "Given a list (@var{arg1} @dots{} @var{args}), this function\n" | |
3315 | "conses the @var{arg1} @dots{} arguments onto the front of\n" | |
3316 | "@var{args}, and returns the resulting list. Note that\n" | |
3317 | "@var{args} is a list; thus, the argument to this function is\n" | |
3318 | "a list whose last element is a list.\n" | |
3319 | "Note: Rather than do new consing, @code{apply:nconc2last}\n" | |
3320 | "destroys its argument, so use with care.") | |
1bbd0b84 | 3321 | #define FUNC_NAME s_scm_nconc2last |
0f2d19dd JB |
3322 | { |
3323 | SCM *lloc; | |
c1bfcf60 | 3324 | SCM_VALIDATE_NONEMPTYLIST (1,lst); |
0f2d19dd | 3325 | lloc = &lst; |
01f11e02 | 3326 | while (!SCM_NULLP (SCM_CDR (*lloc))) |
a23afe53 | 3327 | lloc = SCM_CDRLOC (*lloc); |
1bbd0b84 | 3328 | SCM_ASSERT (scm_ilength (SCM_CAR (*lloc)) >= 0, lst, SCM_ARG1, FUNC_NAME); |
0f2d19dd JB |
3329 | *lloc = SCM_CAR (*lloc); |
3330 | return lst; | |
3331 | } | |
1bbd0b84 | 3332 | #undef FUNC_NAME |
0f2d19dd JB |
3333 | |
3334 | #endif /* !DEVAL */ | |
3335 | ||
6dbd0af5 MD |
3336 | |
3337 | /* SECTION: When DEVAL is defined this code yields scm_dapply. | |
3338 | * It is compiled twice. | |
3339 | */ | |
3340 | ||
0f2d19dd | 3341 | #if 0 |
1cc91f1b | 3342 | |
0f2d19dd | 3343 | SCM |
6e8d25a6 | 3344 | scm_apply (SCM proc, SCM arg1, SCM args) |
0f2d19dd JB |
3345 | {} |
3346 | #endif | |
3347 | ||
3348 | #if 0 | |
1cc91f1b | 3349 | |
0f2d19dd | 3350 | SCM |
6e8d25a6 GB |
3351 | scm_dapply (SCM proc, SCM arg1, SCM args) |
3352 | { /* empty */ } | |
0f2d19dd JB |
3353 | #endif |
3354 | ||
1cc91f1b | 3355 | |
82a2622a JB |
3356 | /* Apply a function to a list of arguments. |
3357 | ||
3358 | This function is exported to the Scheme level as taking two | |
3359 | required arguments and a tail argument, as if it were: | |
3360 | (lambda (proc arg1 . args) ...) | |
3361 | Thus, if you just have a list of arguments to pass to a procedure, | |
3362 | pass the list as ARG1, and '() for ARGS. If you have some fixed | |
3363 | args, pass the first as ARG1, then cons any remaining fixed args | |
3364 | onto the front of your argument list, and pass that as ARGS. */ | |
3365 | ||
0f2d19dd | 3366 | SCM |
1bbd0b84 | 3367 | SCM_APPLY (SCM proc, SCM arg1, SCM args) |
0f2d19dd JB |
3368 | { |
3369 | #ifdef DEBUG_EXTENSIONS | |
3370 | #ifdef DEVAL | |
92c2555f MV |
3371 | scm_t_debug_frame debug; |
3372 | scm_t_debug_info debug_vect_body; | |
1646d37b | 3373 | debug.prev = scm_last_debug_frame; |
b7ff98dd | 3374 | debug.status = SCM_APPLYFRAME; |
c0ab1b8d | 3375 | debug.vect = &debug_vect_body; |
6dbd0af5 MD |
3376 | debug.vect[0].a.proc = proc; |
3377 | debug.vect[0].a.args = SCM_EOL; | |
1646d37b | 3378 | scm_last_debug_frame = &debug; |
0f2d19dd | 3379 | #else |
b7ff98dd | 3380 | if (SCM_DEBUGGINGP) |
0f2d19dd JB |
3381 | return scm_dapply (proc, arg1, args); |
3382 | #endif | |
3383 | #endif | |
3384 | ||
3385 | SCM_ASRTGO (SCM_NIMP (proc), badproc); | |
82a2622a JB |
3386 | |
3387 | /* If ARGS is the empty list, then we're calling apply with only two | |
3388 | arguments --- ARG1 is the list of arguments for PROC. Whatever | |
3389 | the case, futz with things so that ARG1 is the first argument to | |
3390 | give to PROC (or SCM_UNDEFINED if no args), and ARGS contains the | |
30000774 JB |
3391 | rest. |
3392 | ||
3393 | Setting the debug apply frame args this way is pretty messy. | |
3394 | Perhaps we should store arg1 and args directly in the frame as | |
3395 | received, and let scm_frame_arguments unpack them, because that's | |
3396 | a relatively rare operation. This works for now; if the Guile | |
3397 | developer archives are still around, see Mikael's post of | |
3398 | 11-Apr-97. */ | |
0f2d19dd JB |
3399 | if (SCM_NULLP (args)) |
3400 | { | |
3401 | if (SCM_NULLP (arg1)) | |
30000774 JB |
3402 | { |
3403 | arg1 = SCM_UNDEFINED; | |
3404 | #ifdef DEVAL | |
3405 | debug.vect[0].a.args = SCM_EOL; | |
3406 | #endif | |
3407 | } | |
0f2d19dd JB |
3408 | else |
3409 | { | |
30000774 JB |
3410 | #ifdef DEVAL |
3411 | debug.vect[0].a.args = arg1; | |
3412 | #endif | |
0f2d19dd JB |
3413 | args = SCM_CDR (arg1); |
3414 | arg1 = SCM_CAR (arg1); | |
3415 | } | |
3416 | } | |
3417 | else | |
3418 | { | |
0f2d19dd | 3419 | args = scm_nconc2last (args); |
30000774 JB |
3420 | #ifdef DEVAL |
3421 | debug.vect[0].a.args = scm_cons (arg1, args); | |
3422 | #endif | |
0f2d19dd | 3423 | } |
0f2d19dd | 3424 | #ifdef DEVAL |
b6d75948 | 3425 | if (SCM_ENTER_FRAME_P && SCM_TRAPS_P) |
6dbd0af5 MD |
3426 | { |
3427 | SCM tmp; | |
b7ff98dd | 3428 | if (SCM_CHEAPTRAPS_P) |
c0ab1b8d | 3429 | tmp = scm_make_debugobj (&debug); |
6dbd0af5 MD |
3430 | else |
3431 | { | |
5f144b10 GH |
3432 | int first; |
3433 | ||
3434 | tmp = scm_make_continuation (&first); | |
3435 | if (!first) | |
6dbd0af5 MD |
3436 | goto entap; |
3437 | } | |
d95c0b76 NJ |
3438 | SCM_TRAPS_P = 0; |
3439 | scm_call_2 (SCM_ENTER_FRAME_HDLR, scm_sym_enter_frame, tmp); | |
3440 | SCM_TRAPS_P = 1; | |
6dbd0af5 MD |
3441 | } |
3442 | entap: | |
3443 | ENTER_APPLY; | |
3444 | #endif | |
6dbd0af5 | 3445 | tail: |
0f2d19dd JB |
3446 | switch (SCM_TYP7 (proc)) |
3447 | { | |
3448 | case scm_tc7_subr_2o: | |
3449 | args = SCM_NULLP (args) ? SCM_UNDEFINED : SCM_CAR (args); | |
ddea3325 | 3450 | RETURN (SCM_SUBRF (proc) (arg1, args)); |
0f2d19dd | 3451 | case scm_tc7_subr_2: |
01f11e02 | 3452 | SCM_ASRTGO (!SCM_NULLP (args) && SCM_NULLP (SCM_CDR (args)), |
269861c7 | 3453 | wrongnumargs); |
0f2d19dd | 3454 | args = SCM_CAR (args); |
ddea3325 | 3455 | RETURN (SCM_SUBRF (proc) (arg1, args)); |
0f2d19dd JB |
3456 | case scm_tc7_subr_0: |
3457 | SCM_ASRTGO (SCM_UNBNDP (arg1), wrongnumargs); | |
ddea3325 | 3458 | RETURN (SCM_SUBRF (proc) ()); |
0f2d19dd | 3459 | case scm_tc7_subr_1: |
41ee56dd | 3460 | SCM_ASRTGO (!SCM_UNBNDP (arg1), wrongnumargs); |
0f2d19dd JB |
3461 | case scm_tc7_subr_1o: |
3462 | SCM_ASRTGO (SCM_NULLP (args), wrongnumargs); | |
ddea3325 | 3463 | RETURN (SCM_SUBRF (proc) (arg1)); |
0f2d19dd | 3464 | case scm_tc7_cxr: |
90cd76d9 | 3465 | SCM_ASRTGO (!SCM_UNBNDP (arg1) && SCM_NULLP (args), wrongnumargs); |
0f2d19dd JB |
3466 | if (SCM_SUBRF (proc)) |
3467 | { | |
6dbd0af5 MD |
3468 | if (SCM_INUMP (arg1)) |
3469 | { | |
f8de44c1 | 3470 | RETURN (scm_make_real (SCM_DSUBRF (proc) ((double) SCM_INUM (arg1)))); |
6dbd0af5 | 3471 | } |
01f11e02 | 3472 | else if (SCM_REALP (arg1)) |
6dbd0af5 | 3473 | { |
eb42e2f0 | 3474 | RETURN (scm_make_real (SCM_DSUBRF (proc) (SCM_REAL_VALUE (arg1)))); |
6dbd0af5 | 3475 | } |
0f2d19dd | 3476 | #ifdef SCM_BIGDIG |
01f11e02 | 3477 | else if (SCM_BIGP (arg1)) |
ddea3325 | 3478 | RETURN (scm_make_real (SCM_DSUBRF (proc) (scm_i_big2dbl (arg1)))); |
0f2d19dd | 3479 | #endif |
9de33deb | 3480 | SCM_WTA_DISPATCH_1 (*SCM_SUBR_GENERIC (proc), arg1, |
3db4adfc | 3481 | SCM_ARG1, SCM_SYMBOL_CHARS (SCM_SNAME (proc))); |
0f2d19dd | 3482 | } |
3201d763 | 3483 | proc = SCM_SNAME (proc); |
0f2d19dd | 3484 | { |
b5c2579a | 3485 | char *chrs = SCM_SYMBOL_CHARS (proc) + SCM_SYMBOL_LENGTH (proc) - 1; |
0f2d19dd JB |
3486 | while ('c' != *--chrs) |
3487 | { | |
0c95b57d | 3488 | SCM_ASSERT (SCM_CONSP (arg1), |
3db4adfc | 3489 | arg1, SCM_ARG1, SCM_SYMBOL_CHARS (proc)); |
0f2d19dd JB |
3490 | arg1 = ('a' == *chrs) ? SCM_CAR (arg1) : SCM_CDR (arg1); |
3491 | } | |
ddea3325 | 3492 | RETURN (arg1); |
0f2d19dd JB |
3493 | } |
3494 | case scm_tc7_subr_3: | |
01f11e02 DH |
3495 | SCM_ASRTGO (!SCM_NULLP (args) |
3496 | && !SCM_NULLP (SCM_CDR (args)) | |
f1e06a96 MD |
3497 | && SCM_NULLP (SCM_CDDR (args)), |
3498 | wrongnumargs); | |
ddea3325 | 3499 | RETURN (SCM_SUBRF (proc) (arg1, SCM_CAR (args), SCM_CADR (args))); |
0f2d19dd JB |
3500 | case scm_tc7_lsubr: |
3501 | #ifdef DEVAL | |
ddea3325 | 3502 | RETURN (SCM_SUBRF (proc) (SCM_UNBNDP (arg1) ? SCM_EOL : debug.vect[0].a.args)); |
0f2d19dd | 3503 | #else |
ddea3325 | 3504 | RETURN (SCM_SUBRF (proc) (SCM_UNBNDP (arg1) ? SCM_EOL : scm_cons (arg1, args))); |
0f2d19dd JB |
3505 | #endif |
3506 | case scm_tc7_lsubr_2: | |
0c95b57d | 3507 | SCM_ASRTGO (SCM_CONSP (args), wrongnumargs); |
ddea3325 | 3508 | RETURN (SCM_SUBRF (proc) (arg1, SCM_CAR (args), SCM_CDR (args))); |
0f2d19dd JB |
3509 | case scm_tc7_asubr: |
3510 | if (SCM_NULLP (args)) | |
ddea3325 | 3511 | RETURN (SCM_SUBRF (proc) (arg1, SCM_UNDEFINED)); |
0f2d19dd JB |
3512 | while (SCM_NIMP (args)) |
3513 | { | |
3514 | SCM_ASSERT (SCM_CONSP (args), args, SCM_ARG2, "apply"); | |
3515 | arg1 = SCM_SUBRF (proc) (arg1, SCM_CAR (args)); | |
3516 | args = SCM_CDR (args); | |
3517 | } | |
3518 | RETURN (arg1); | |
3519 | case scm_tc7_rpsubr: | |
3520 | if (SCM_NULLP (args)) | |
3521 | RETURN (SCM_BOOL_T); | |
3522 | while (SCM_NIMP (args)) | |
3523 | { | |
3524 | SCM_ASSERT (SCM_CONSP (args), args, SCM_ARG2, "apply"); | |
3525 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg1, SCM_CAR (args)))) | |
3526 | RETURN (SCM_BOOL_F); | |
3527 | arg1 = SCM_CAR (args); | |
3528 | args = SCM_CDR (args); | |
3529 | } | |
3530 | RETURN (SCM_BOOL_T); | |
3531 | case scm_tcs_closures: | |
3532 | #ifdef DEVAL | |
6dbd0af5 | 3533 | arg1 = (SCM_UNBNDP (arg1) ? SCM_EOL : debug.vect[0].a.args); |
0f2d19dd JB |
3534 | #else |
3535 | arg1 = (SCM_UNBNDP (arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
3536 | #endif | |
cf7c17e9 | 3537 | #ifndef SCM_RECKLESS |
726d810a | 3538 | if (scm_badargsp (SCM_CLOSURE_FORMALS (proc), arg1)) |
0f2d19dd JB |
3539 | goto wrongnumargs; |
3540 | #endif | |
1609038c MD |
3541 | |
3542 | /* Copy argument list */ | |
3543 | if (SCM_IMP (arg1)) | |
3544 | args = arg1; | |
3545 | else | |
3546 | { | |
3547 | SCM tl = args = scm_cons (SCM_CAR (arg1), SCM_UNSPECIFIED); | |
cabe682c | 3548 | while (arg1 = SCM_CDR (arg1), SCM_CONSP (arg1)) |
1609038c MD |
3549 | { |
3550 | SCM_SETCDR (tl, scm_cons (SCM_CAR (arg1), | |
3551 | SCM_UNSPECIFIED)); | |
3552 | tl = SCM_CDR (tl); | |
3553 | } | |
3554 | SCM_SETCDR (tl, arg1); | |
3555 | } | |
3556 | ||
726d810a | 3557 | args = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), args, SCM_ENV (proc)); |
2ddb0920 | 3558 | proc = SCM_CDR (SCM_CODE (proc)); |
e791c18f MD |
3559 | again: |
3560 | arg1 = proc; | |
01f11e02 | 3561 | while (!SCM_NULLP (arg1 = SCM_CDR (arg1))) |
2ddb0920 MD |
3562 | { |
3563 | if (SCM_IMP (SCM_CAR (proc))) | |
3564 | { | |
3565 | if (SCM_ISYMP (SCM_CAR (proc))) | |
3566 | { | |
3567 | proc = scm_m_expand_body (proc, args); | |
e791c18f | 3568 | goto again; |
2ddb0920 | 3569 | } |
5280aaca | 3570 | else |
17fa3fcf | 3571 | SCM_VALIDATE_NON_EMPTY_COMBINATION (SCM_CAR (proc)); |
2ddb0920 MD |
3572 | } |
3573 | else | |
e791c18f MD |
3574 | SCM_CEVAL (SCM_CAR (proc), args); |
3575 | proc = arg1; | |
2ddb0920 | 3576 | } |
e791c18f | 3577 | RETURN (EVALCAR (proc, args)); |
0717dfd8 | 3578 | case scm_tc7_smob: |
68b06924 | 3579 | if (!SCM_SMOB_APPLICABLE_P (proc)) |
0717dfd8 | 3580 | goto badproc; |
afa38f6e | 3581 | if (SCM_UNBNDP (arg1)) |
ddea3325 | 3582 | RETURN (SCM_SMOB_APPLY_0 (proc)); |
afa38f6e | 3583 | else if (SCM_NULLP (args)) |
ddea3325 | 3584 | RETURN (SCM_SMOB_APPLY_1 (proc, arg1)); |
0717dfd8 | 3585 | else if (SCM_NULLP (SCM_CDR (args))) |
ddea3325 | 3586 | RETURN (SCM_SMOB_APPLY_2 (proc, arg1, SCM_CAR (args))); |
0717dfd8 | 3587 | else |
68b06924 | 3588 | RETURN (SCM_SMOB_APPLY_3 (proc, arg1, SCM_CAR (args), SCM_CDR (args))); |
0f2d19dd JB |
3589 | case scm_tc7_cclo: |
3590 | #ifdef DEVAL | |
6dbd0af5 MD |
3591 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : debug.vect[0].a.args); |
3592 | arg1 = proc; | |
3593 | proc = SCM_CCLO_SUBR (proc); | |
3594 | debug.vect[0].a.proc = proc; | |
3595 | debug.vect[0].a.args = scm_cons (arg1, args); | |
0f2d19dd JB |
3596 | #else |
3597 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
0f2d19dd JB |
3598 | arg1 = proc; |
3599 | proc = SCM_CCLO_SUBR (proc); | |
6dbd0af5 | 3600 | #endif |
0f2d19dd | 3601 | goto tail; |
89efbff4 MD |
3602 | case scm_tc7_pws: |
3603 | proc = SCM_PROCEDURE (proc); | |
3604 | #ifdef DEVAL | |
3605 | debug.vect[0].a.proc = proc; | |
3606 | #endif | |
3607 | goto tail; | |
904a077d | 3608 | case scm_tcs_struct: |
f3d2630a MD |
3609 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) |
3610 | { | |
3611 | #ifdef DEVAL | |
3612 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : debug.vect[0].a.args); | |
3613 | #else | |
3614 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
3615 | #endif | |
195847fa | 3616 | RETURN (scm_apply_generic (proc, args)); |
f3d2630a MD |
3617 | } |
3618 | else if (!SCM_I_OPERATORP (proc)) | |
9b07e212 MD |
3619 | goto badproc; |
3620 | else | |
da7f71d7 MD |
3621 | { |
3622 | #ifdef DEVAL | |
3623 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : debug.vect[0].a.args); | |
3624 | #else | |
3625 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
3626 | #endif | |
3627 | arg1 = proc; | |
195847fa MD |
3628 | proc = (SCM_I_ENTITYP (proc) |
3629 | ? SCM_ENTITY_PROCEDURE (proc) | |
3630 | : SCM_OPERATOR_PROCEDURE (proc)); | |
da7f71d7 MD |
3631 | #ifdef DEVAL |
3632 | debug.vect[0].a.proc = proc; | |
3633 | debug.vect[0].a.args = scm_cons (arg1, args); | |
3634 | #endif | |
195847fa MD |
3635 | if (SCM_NIMP (proc)) |
3636 | goto tail; | |
3637 | else | |
3638 | goto badproc; | |
da7f71d7 | 3639 | } |
0f2d19dd | 3640 | wrongnumargs: |
f5bf2977 | 3641 | scm_wrong_num_args (proc); |
0f2d19dd JB |
3642 | default: |
3643 | badproc: | |
db4b4ca6 | 3644 | scm_wrong_type_arg ("apply", SCM_ARG1, proc); |
0f2d19dd JB |
3645 | RETURN (arg1); |
3646 | } | |
3647 | #ifdef DEVAL | |
6dbd0af5 | 3648 | exit: |
b6d75948 | 3649 | if (CHECK_EXIT && SCM_TRAPS_P) |
b7ff98dd | 3650 | if (SCM_EXIT_FRAME_P || (SCM_TRACE_P && SCM_TRACED_FRAME_P (debug))) |
6dbd0af5 | 3651 | { |
b7ff98dd MD |
3652 | SCM_CLEAR_TRACED_FRAME (debug); |
3653 | if (SCM_CHEAPTRAPS_P) | |
c0ab1b8d | 3654 | arg1 = scm_make_debugobj (&debug); |
6dbd0af5 MD |
3655 | else |
3656 | { | |
5f144b10 GH |
3657 | int first; |
3658 | SCM val = scm_make_continuation (&first); | |
3659 | ||
3660 | if (first) | |
3661 | arg1 = val; | |
3662 | else | |
6dbd0af5 | 3663 | { |
5f144b10 | 3664 | proc = val; |
6dbd0af5 MD |
3665 | goto ret; |
3666 | } | |
3667 | } | |
d95c0b76 NJ |
3668 | SCM_TRAPS_P = 0; |
3669 | scm_call_3 (SCM_EXIT_FRAME_HDLR, scm_sym_exit_frame, arg1, proc); | |
3670 | SCM_TRAPS_P = 1; | |
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 | ||
47c3f06d | 3686 | Verify that each element of the vector ARGV, except for the first, |
d9c393f5 | 3687 | is a proper list whose length is LEN. Attribute errors to WHO, |
47c3f06d | 3688 | and claim that the i'th element of ARGV is WHO's i+2'th argument. */ |
d9c393f5 | 3689 | static inline void |
47c3f06d | 3690 | check_map_args (SCM argv, |
c014a02e | 3691 | long len, |
47c3f06d MD |
3692 | SCM gf, |
3693 | SCM proc, | |
3694 | SCM args, | |
3695 | const char *who) | |
d9c393f5 | 3696 | { |
47c3f06d | 3697 | SCM *ve = SCM_VELTS (argv); |
c014a02e | 3698 | long i; |
d9c393f5 | 3699 | |
b5c2579a | 3700 | for (i = SCM_VECTOR_LENGTH (argv) - 1; i >= 1; i--) |
d9c393f5 | 3701 | { |
c014a02e | 3702 | long elt_len = scm_ilength (ve[i]); |
d9c393f5 JB |
3703 | |
3704 | if (elt_len < 0) | |
47c3f06d MD |
3705 | { |
3706 | if (gf) | |
3707 | scm_apply_generic (gf, scm_cons (proc, args)); | |
3708 | else | |
3709 | scm_wrong_type_arg (who, i + 2, ve[i]); | |
3710 | } | |
d9c393f5 JB |
3711 | |
3712 | if (elt_len != len) | |
3713 | scm_out_of_range (who, ve[i]); | |
3714 | } | |
3715 | ||
5d2b97cd | 3716 | scm_remember_upto_here_1 (argv); |
d9c393f5 JB |
3717 | } |
3718 | ||
3719 | ||
47c3f06d | 3720 | SCM_GPROC (s_map, "map", 2, 0, 1, scm_map, g_map); |
1cc91f1b | 3721 | |
368bf056 MD |
3722 | /* Note: Currently, scm_map applies PROC to the argument list(s) |
3723 | sequentially, starting with the first element(s). This is used in | |
8878f040 | 3724 | evalext.c where the Scheme procedure `map-in-order', which guarantees |
368bf056 | 3725 | sequential behaviour, is implemented using scm_map. If the |
8878f040 | 3726 | behaviour changes, we need to update `map-in-order'. |
368bf056 MD |
3727 | */ |
3728 | ||
0f2d19dd | 3729 | SCM |
1bbd0b84 | 3730 | scm_map (SCM proc, SCM arg1, SCM args) |
af45e3b0 | 3731 | #define FUNC_NAME s_map |
0f2d19dd | 3732 | { |
c014a02e | 3733 | long i, len; |
0f2d19dd JB |
3734 | SCM res = SCM_EOL; |
3735 | SCM *pres = &res; | |
3736 | SCM *ve = &args; /* Keep args from being optimized away. */ | |
3737 | ||
d9c393f5 | 3738 | len = scm_ilength (arg1); |
47c3f06d MD |
3739 | SCM_GASSERTn (len >= 0, |
3740 | g_map, scm_cons2 (proc, arg1, args), SCM_ARG2, s_map); | |
af45e3b0 | 3741 | SCM_VALIDATE_REST_ARGUMENT (args); |
0f2d19dd JB |
3742 | if (SCM_NULLP (args)) |
3743 | { | |
3744 | while (SCM_NIMP (arg1)) | |
3745 | { | |
8ea46249 | 3746 | *pres = scm_list_1 (scm_apply (proc, SCM_CAR (arg1), scm_listofnull)); |
a23afe53 | 3747 | pres = SCM_CDRLOC (*pres); |
0f2d19dd JB |
3748 | arg1 = SCM_CDR (arg1); |
3749 | } | |
3750 | return res; | |
3751 | } | |
47c3f06d | 3752 | args = scm_vector (arg1 = scm_cons (arg1, args)); |
0f2d19dd | 3753 | ve = SCM_VELTS (args); |
cf7c17e9 | 3754 | #ifndef SCM_RECKLESS |
47c3f06d | 3755 | check_map_args (args, len, g_map, proc, arg1, s_map); |
0f2d19dd JB |
3756 | #endif |
3757 | while (1) | |
3758 | { | |
3759 | arg1 = SCM_EOL; | |
b5c2579a | 3760 | for (i = SCM_VECTOR_LENGTH (args) - 1; i >= 0; i--) |
0f2d19dd | 3761 | { |
d9c393f5 JB |
3762 | if (SCM_IMP (ve[i])) |
3763 | return res; | |
0f2d19dd JB |
3764 | arg1 = scm_cons (SCM_CAR (ve[i]), arg1); |
3765 | ve[i] = SCM_CDR (ve[i]); | |
3766 | } | |
8ea46249 | 3767 | *pres = scm_list_1 (scm_apply (proc, arg1, SCM_EOL)); |
a23afe53 | 3768 | pres = SCM_CDRLOC (*pres); |
0f2d19dd JB |
3769 | } |
3770 | } | |
af45e3b0 | 3771 | #undef FUNC_NAME |
0f2d19dd JB |
3772 | |
3773 | ||
47c3f06d | 3774 | SCM_GPROC (s_for_each, "for-each", 2, 0, 1, scm_for_each, g_for_each); |
1cc91f1b | 3775 | |
0f2d19dd | 3776 | SCM |
1bbd0b84 | 3777 | scm_for_each (SCM proc, SCM arg1, SCM args) |
af45e3b0 | 3778 | #define FUNC_NAME s_for_each |
0f2d19dd JB |
3779 | { |
3780 | SCM *ve = &args; /* Keep args from being optimized away. */ | |
c014a02e | 3781 | long i, len; |
d9c393f5 | 3782 | len = scm_ilength (arg1); |
47c3f06d MD |
3783 | SCM_GASSERTn (len >= 0, g_for_each, scm_cons2 (proc, arg1, args), |
3784 | SCM_ARG2, s_for_each); | |
af45e3b0 | 3785 | SCM_VALIDATE_REST_ARGUMENT (args); |
0f2d19dd JB |
3786 | if SCM_NULLP (args) |
3787 | { | |
3788 | while SCM_NIMP (arg1) | |
3789 | { | |
0f2d19dd JB |
3790 | scm_apply (proc, SCM_CAR (arg1), scm_listofnull); |
3791 | arg1 = SCM_CDR (arg1); | |
3792 | } | |
3793 | return SCM_UNSPECIFIED; | |
3794 | } | |
47c3f06d | 3795 | args = scm_vector (arg1 = scm_cons (arg1, args)); |
0f2d19dd | 3796 | ve = SCM_VELTS (args); |
cf7c17e9 | 3797 | #ifndef SCM_RECKLESS |
47c3f06d | 3798 | check_map_args (args, len, g_for_each, proc, arg1, s_for_each); |
0f2d19dd JB |
3799 | #endif |
3800 | while (1) | |
3801 | { | |
3802 | arg1 = SCM_EOL; | |
b5c2579a | 3803 | for (i = SCM_VECTOR_LENGTH (args) - 1; i >= 0; i--) |
0f2d19dd JB |
3804 | { |
3805 | if SCM_IMP | |
3806 | (ve[i]) return SCM_UNSPECIFIED; | |
3807 | arg1 = scm_cons (SCM_CAR (ve[i]), arg1); | |
3808 | ve[i] = SCM_CDR (ve[i]); | |
3809 | } | |
3810 | scm_apply (proc, arg1, SCM_EOL); | |
3811 | } | |
3812 | } | |
af45e3b0 | 3813 | #undef FUNC_NAME |
0f2d19dd | 3814 | |
1cc91f1b | 3815 | |
0f2d19dd | 3816 | SCM |
6e8d25a6 | 3817 | scm_closure (SCM code, SCM env) |
0f2d19dd JB |
3818 | { |
3819 | register SCM z; | |
86d31dfe | 3820 | |
0f2d19dd JB |
3821 | SCM_NEWCELL (z); |
3822 | SCM_SETCODE (z, code); | |
a23afe53 | 3823 | SCM_SETENV (z, env); |
0f2d19dd JB |
3824 | return z; |
3825 | } | |
3826 | ||
3827 | ||
92c2555f | 3828 | scm_t_bits scm_tc16_promise; |
1cc91f1b | 3829 | |
0f2d19dd | 3830 | SCM |
6e8d25a6 | 3831 | scm_makprom (SCM code) |
0f2d19dd | 3832 | { |
cf498326 | 3833 | SCM_RETURN_NEWSMOB (scm_tc16_promise, SCM_UNPACK (code)); |
0f2d19dd JB |
3834 | } |
3835 | ||
3836 | ||
1cc91f1b | 3837 | |
0f2d19dd | 3838 | static int |
e841c3e0 | 3839 | promise_print (SCM exp, SCM port, scm_print_state *pstate) |
0f2d19dd | 3840 | { |
19402679 | 3841 | int writingp = SCM_WRITINGP (pstate); |
b7f3516f | 3842 | scm_puts ("#<promise ", port); |
19402679 | 3843 | SCM_SET_WRITINGP (pstate, 1); |
729dbac3 | 3844 | scm_iprin1 (SCM_CELL_OBJECT_1 (exp), port, pstate); |
19402679 | 3845 | SCM_SET_WRITINGP (pstate, writingp); |
b7f3516f | 3846 | scm_putc ('>', port); |
0f2d19dd JB |
3847 | return !0; |
3848 | } | |
3849 | ||
3850 | ||
3b3b36dd | 3851 | SCM_DEFINE (scm_force, "force", 1, 0, 0, |
67e8151b MG |
3852 | (SCM x), |
3853 | "If the promise @var{x} has not been computed yet, compute and\n" | |
3854 | "return @var{x}, otherwise just return the previously computed\n" | |
3855 | "value.") | |
1bbd0b84 | 3856 | #define FUNC_NAME s_scm_force |
0f2d19dd | 3857 | { |
445f675c DH |
3858 | SCM_VALIDATE_SMOB (1, x, promise); |
3859 | if (!((1L << 16) & SCM_CELL_WORD_0 (x))) | |
0f2d19dd | 3860 | { |
fdc28395 | 3861 | SCM ans = scm_call_0 (SCM_CELL_OBJECT_1 (x)); |
445f675c | 3862 | if (!((1L << 16) & SCM_CELL_WORD_0 (x))) |
0f2d19dd JB |
3863 | { |
3864 | SCM_DEFER_INTS; | |
445f675c DH |
3865 | SCM_SET_CELL_OBJECT_1 (x, ans); |
3866 | SCM_SET_CELL_WORD_0 (x, SCM_CELL_WORD_0 (x) | (1L << 16)); | |
0f2d19dd JB |
3867 | SCM_ALLOW_INTS; |
3868 | } | |
3869 | } | |
445f675c | 3870 | return SCM_CELL_OBJECT_1 (x); |
0f2d19dd | 3871 | } |
1bbd0b84 | 3872 | #undef FUNC_NAME |
0f2d19dd | 3873 | |
445f675c | 3874 | |
a1ec6916 | 3875 | SCM_DEFINE (scm_promise_p, "promise?", 1, 0, 0, |
67e8151b | 3876 | (SCM obj), |
b380b885 | 3877 | "Return true if @var{obj} is a promise, i.e. a delayed computation\n" |
7a095584 | 3878 | "(@pxref{Delayed evaluation,,,r5rs.info,The Revised^5 Report on Scheme}).") |
1bbd0b84 | 3879 | #define FUNC_NAME s_scm_promise_p |
0f2d19dd | 3880 | { |
67e8151b | 3881 | return SCM_BOOL (SCM_TYP16_PREDICATE (scm_tc16_promise, obj)); |
0f2d19dd | 3882 | } |
1bbd0b84 | 3883 | #undef FUNC_NAME |
0f2d19dd | 3884 | |
445f675c | 3885 | |
a1ec6916 | 3886 | SCM_DEFINE (scm_cons_source, "cons-source", 3, 0, 0, |
1bbd0b84 | 3887 | (SCM xorig, SCM x, SCM y), |
11768c04 NJ |
3888 | "Create and return a new pair whose car and cdr are @var{x} and @var{y}.\n" |
3889 | "Any source properties associated with @var{xorig} are also associated\n" | |
3890 | "with the new pair.") | |
1bbd0b84 | 3891 | #define FUNC_NAME s_scm_cons_source |
26d5b9b4 MD |
3892 | { |
3893 | SCM p, z; | |
3894 | SCM_NEWCELL (z); | |
445f675c DH |
3895 | SCM_SET_CELL_OBJECT_0 (z, x); |
3896 | SCM_SET_CELL_OBJECT_1 (z, y); | |
26d5b9b4 MD |
3897 | /* Copy source properties possibly associated with xorig. */ |
3898 | p = scm_whash_lookup (scm_source_whash, xorig); | |
445f675c | 3899 | if (!SCM_IMP (p)) |
26d5b9b4 MD |
3900 | scm_whash_insert (scm_source_whash, z, p); |
3901 | return z; | |
3902 | } | |
1bbd0b84 | 3903 | #undef FUNC_NAME |
26d5b9b4 | 3904 | |
445f675c | 3905 | |
a1ec6916 | 3906 | SCM_DEFINE (scm_copy_tree, "copy-tree", 1, 0, 0, |
1bbd0b84 | 3907 | (SCM obj), |
b380b885 MD |
3908 | "Recursively copy the data tree that is bound to @var{obj}, and return a\n" |
3909 | "pointer to the new data structure. @code{copy-tree} recurses down the\n" | |
3910 | "contents of both pairs and vectors (since both cons cells and vector\n" | |
3911 | "cells may point to arbitrary objects), and stops recursing when it hits\n" | |
3912 | "any other object.") | |
1bbd0b84 | 3913 | #define FUNC_NAME s_scm_copy_tree |
0f2d19dd JB |
3914 | { |
3915 | SCM ans, tl; | |
26d5b9b4 | 3916 | if (SCM_IMP (obj)) |
ff467021 | 3917 | return obj; |
3910272e MD |
3918 | if (SCM_VECTORP (obj)) |
3919 | { | |
c014a02e | 3920 | unsigned long i = SCM_VECTOR_LENGTH (obj); |
00ffa0e7 | 3921 | ans = scm_c_make_vector (i, SCM_UNSPECIFIED); |
3910272e MD |
3922 | while (i--) |
3923 | SCM_VELTS (ans)[i] = scm_copy_tree (SCM_VELTS (obj)[i]); | |
3924 | return ans; | |
3925 | } | |
01f11e02 | 3926 | if (!SCM_CONSP (obj)) |
0f2d19dd | 3927 | return obj; |
26d5b9b4 MD |
3928 | ans = tl = scm_cons_source (obj, |
3929 | scm_copy_tree (SCM_CAR (obj)), | |
3930 | SCM_UNSPECIFIED); | |
cabe682c | 3931 | while (obj = SCM_CDR (obj), SCM_CONSP (obj)) |
a23afe53 MD |
3932 | { |
3933 | SCM_SETCDR (tl, scm_cons (scm_copy_tree (SCM_CAR (obj)), | |
3934 | SCM_UNSPECIFIED)); | |
3935 | tl = SCM_CDR (tl); | |
3936 | } | |
3937 | SCM_SETCDR (tl, obj); | |
0f2d19dd JB |
3938 | return ans; |
3939 | } | |
1bbd0b84 | 3940 | #undef FUNC_NAME |
0f2d19dd | 3941 | |
1cc91f1b | 3942 | |
4163eb72 MV |
3943 | /* We have three levels of EVAL here: |
3944 | ||
3945 | - scm_i_eval (exp, env) | |
3946 | ||
3947 | evaluates EXP in environment ENV. ENV is a lexical environment | |
3948 | structure as used by the actual tree code evaluator. When ENV is | |
3949 | a top-level environment, then changes to the current module are | |
a513ead3 | 3950 | tracked by updating ENV so that it continues to be in sync with |
4163eb72 MV |
3951 | the current module. |
3952 | ||
3953 | - scm_primitive_eval (exp) | |
3954 | ||
3955 | evaluates EXP in the top-level environment as determined by the | |
3956 | current module. This is done by constructing a suitable | |
3957 | environment and calling scm_i_eval. Thus, changes to the | |
3958 | top-level module are tracked normally. | |
3959 | ||
3960 | - scm_eval (exp, mod) | |
3961 | ||
a513ead3 | 3962 | evaluates EXP while MOD is the current module. This is done by |
4163eb72 MV |
3963 | setting the current module to MOD, invoking scm_primitive_eval on |
3964 | EXP, and then restoring the current module to the value it had | |
3965 | previously. That is, while EXP is evaluated, changes to the | |
3966 | current module are tracked, but these changes do not persist when | |
3967 | scm_eval returns. | |
3968 | ||
3969 | For each level of evals, there are two variants, distinguished by a | |
3970 | _x suffix: the ordinary variant does not modify EXP while the _x | |
3971 | variant can destructively modify EXP into something completely | |
3972 | unintelligible. A Scheme data structure passed as EXP to one of the | |
3973 | _x variants should not ever be used again for anything. So when in | |
3974 | doubt, use the ordinary variant. | |
3975 | ||
3976 | */ | |
3977 | ||
0f2d19dd | 3978 | SCM |
68d8be66 | 3979 | scm_i_eval_x (SCM exp, SCM env) |
0f2d19dd | 3980 | { |
68d8be66 | 3981 | return SCM_XEVAL (exp, env); |
0f2d19dd JB |
3982 | } |
3983 | ||
68d8be66 MD |
3984 | SCM |
3985 | scm_i_eval (SCM exp, SCM env) | |
3986 | { | |
26fb6390 | 3987 | exp = scm_copy_tree (exp); |
e37a4fba | 3988 | return SCM_XEVAL (exp, env); |
68d8be66 MD |
3989 | } |
3990 | ||
3991 | SCM | |
4163eb72 | 3992 | scm_primitive_eval_x (SCM exp) |
0f2d19dd | 3993 | { |
a513ead3 | 3994 | SCM env; |
bcdab802 | 3995 | SCM transformer = scm_current_module_transformer (); |
a513ead3 | 3996 | if (SCM_NIMP (transformer)) |
fdc28395 | 3997 | exp = scm_call_1 (transformer, exp); |
a513ead3 | 3998 | env = scm_top_level_env (scm_current_module_lookup_closure ()); |
4163eb72 | 3999 | return scm_i_eval_x (exp, env); |
0f2d19dd JB |
4000 | } |
4001 | ||
4163eb72 MV |
4002 | SCM_DEFINE (scm_primitive_eval, "primitive-eval", 1, 0, 0, |
4003 | (SCM exp), | |
2069af38 | 4004 | "Evaluate @var{exp} in the top-level environment specified by\n" |
4163eb72 MV |
4005 | "the current module.") |
4006 | #define FUNC_NAME s_scm_primitive_eval | |
4007 | { | |
a513ead3 | 4008 | SCM env; |
bcdab802 | 4009 | SCM transformer = scm_current_module_transformer (); |
a513ead3 | 4010 | if (SCM_NIMP (transformer)) |
fdc28395 | 4011 | exp = scm_call_1 (transformer, exp); |
a513ead3 | 4012 | env = scm_top_level_env (scm_current_module_lookup_closure ()); |
4163eb72 MV |
4013 | return scm_i_eval (exp, env); |
4014 | } | |
4015 | #undef FUNC_NAME | |
4016 | ||
68d8be66 MD |
4017 | /* Eval does not take the second arg optionally. This is intentional |
4018 | * in order to be R5RS compatible, and to prepare for the new module | |
4019 | * system, where we would like to make the choice of evaluation | |
4163eb72 | 4020 | * environment explicit. */ |
549e6ec6 | 4021 | |
09074dbf DH |
4022 | static void |
4023 | change_environment (void *data) | |
4024 | { | |
4025 | SCM pair = SCM_PACK (data); | |
4026 | SCM new_module = SCM_CAR (pair); | |
aa767bc5 | 4027 | SCM old_module = scm_current_module (); |
09074dbf | 4028 | SCM_SETCDR (pair, old_module); |
aa767bc5 | 4029 | scm_set_current_module (new_module); |
09074dbf DH |
4030 | } |
4031 | ||
4032 | ||
09074dbf DH |
4033 | static void |
4034 | restore_environment (void *data) | |
4035 | { | |
4036 | SCM pair = SCM_PACK (data); | |
4037 | SCM old_module = SCM_CDR (pair); | |
aa767bc5 | 4038 | SCM new_module = scm_current_module (); |
2e9c835d | 4039 | SCM_SETCAR (pair, new_module); |
aa767bc5 | 4040 | scm_set_current_module (old_module); |
09074dbf DH |
4041 | } |
4042 | ||
4163eb72 MV |
4043 | static SCM |
4044 | inner_eval_x (void *data) | |
4045 | { | |
4046 | return scm_primitive_eval_x (SCM_PACK(data)); | |
4047 | } | |
4048 | ||
4049 | SCM | |
4050 | scm_eval_x (SCM exp, SCM module) | |
4051 | #define FUNC_NAME "eval!" | |
4052 | { | |
4053 | SCM_VALIDATE_MODULE (2, module); | |
4054 | ||
4055 | return scm_internal_dynamic_wind | |
4056 | (change_environment, inner_eval_x, restore_environment, | |
4057 | (void *) SCM_UNPACK (exp), | |
4058 | (void *) SCM_UNPACK (scm_cons (module, SCM_BOOL_F))); | |
4059 | } | |
4060 | #undef FUNC_NAME | |
4061 | ||
4062 | static SCM | |
4063 | inner_eval (void *data) | |
4064 | { | |
4065 | return scm_primitive_eval (SCM_PACK(data)); | |
4066 | } | |
09074dbf | 4067 | |
68d8be66 | 4068 | SCM_DEFINE (scm_eval, "eval", 2, 0, 0, |
4163eb72 MV |
4069 | (SCM exp, SCM module), |
4070 | "Evaluate @var{exp}, a list representing a Scheme expression,\n" | |
4071 | "in the top-level environment specified by @var{module}.\n" | |
4072 | "While @var{exp} is evaluated (using @var{primitive-eval}),\n" | |
4073 | "@var{module} is made the current module. The current module\n" | |
4074 | "is reset to its previous value when @var{eval} returns.") | |
1bbd0b84 | 4075 | #define FUNC_NAME s_scm_eval |
0f2d19dd | 4076 | { |
4163eb72 | 4077 | SCM_VALIDATE_MODULE (2, module); |
09074dbf DH |
4078 | |
4079 | return scm_internal_dynamic_wind | |
4080 | (change_environment, inner_eval, restore_environment, | |
4163eb72 MV |
4081 | (void *) SCM_UNPACK (exp), |
4082 | (void *) SCM_UNPACK (scm_cons (module, SCM_BOOL_F))); | |
0f2d19dd | 4083 | } |
1bbd0b84 | 4084 | #undef FUNC_NAME |
0f2d19dd | 4085 | |
6dbd0af5 MD |
4086 | |
4087 | /* At this point, scm_deval and scm_dapply are generated. | |
4088 | */ | |
4089 | ||
0f2d19dd | 4090 | #ifdef DEBUG_EXTENSIONS |
6dbd0af5 MD |
4091 | # define DEVAL |
4092 | # include "eval.c" | |
0f2d19dd JB |
4093 | #endif |
4094 | ||
4095 | ||
1cc91f1b | 4096 | |
0f2d19dd JB |
4097 | void |
4098 | scm_init_eval () | |
0f2d19dd | 4099 | { |
33b97402 MD |
4100 | scm_init_opts (scm_evaluator_traps, |
4101 | scm_evaluator_trap_table, | |
4102 | SCM_N_EVALUATOR_TRAPS); | |
4103 | scm_init_opts (scm_eval_options_interface, | |
4104 | scm_eval_opts, | |
4105 | SCM_N_EVAL_OPTIONS); | |
4106 | ||
f99c9c28 MD |
4107 | scm_tc16_promise = scm_make_smob_type ("promise", 0); |
4108 | scm_set_smob_mark (scm_tc16_promise, scm_markcdr); | |
e841c3e0 | 4109 | scm_set_smob_print (scm_tc16_promise, promise_print); |
b8229a3b | 4110 | |
7c33806a | 4111 | /* Dirk:Fixme:: make scm_undefineds local to eval.c: it's only used here. */ |
8ea46249 | 4112 | scm_undefineds = scm_list_1 (SCM_UNDEFINED); |
7c33806a | 4113 | SCM_SETCDR (scm_undefineds, scm_undefineds); |
8ea46249 | 4114 | scm_listofnull = scm_list_1 (SCM_EOL); |
7c33806a | 4115 | |
9a441ddb | 4116 | scm_f_apply = scm_c_define_subr ("apply", scm_tc7_lsubr_2, scm_apply); |
0f2d19dd | 4117 | |
86d31dfe MV |
4118 | /* acros */ |
4119 | /* end of acros */ | |
4120 | ||
8dc9439f | 4121 | #ifndef SCM_MAGIC_SNARFER |
a0599745 | 4122 | #include "libguile/eval.x" |
8dc9439f | 4123 | #endif |
25eaf21a | 4124 | |
86d31dfe | 4125 | scm_c_define ("nil", scm_lisp_nil); |
1385d8ae | 4126 | scm_c_define ("t", scm_lisp_t); |
86d31dfe | 4127 | |
25eaf21a | 4128 | scm_add_feature ("delay"); |
0f2d19dd | 4129 | } |
0f2d19dd | 4130 | |
6dbd0af5 | 4131 | #endif /* !DEVAL */ |
89e00824 ML |
4132 | |
4133 | /* | |
4134 | Local Variables: | |
4135 | c-file-style: "gnu" | |
4136 | End: | |
4137 | */ |