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22a52da1 | 1 | /* Copyright (C) 1995,1996,1997,1998,1999,2000,2001 Free Software Foundation, Inc. |
0f2d19dd JB |
2 | * |
3 | * This program is free software; you can redistribute it and/or modify | |
4 | * it under the terms of the GNU General Public License as published by | |
5 | * the Free Software Foundation; either version 2, or (at your option) | |
6 | * any later version. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this software; see the file COPYING. If not, write to | |
82892bed JB |
15 | * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, |
16 | * Boston, MA 02111-1307 USA | |
0f2d19dd JB |
17 | * |
18 | * As a special exception, the Free Software Foundation gives permission | |
19 | * for additional uses of the text contained in its release of GUILE. | |
20 | * | |
21 | * The exception is that, if you link the GUILE library with other files | |
22 | * to produce an executable, this does not by itself cause the | |
23 | * resulting executable to be covered by the GNU General Public License. | |
24 | * Your use of that executable is in no way restricted on account of | |
25 | * linking the GUILE library code into it. | |
26 | * | |
27 | * This exception does not however invalidate any other reasons why | |
28 | * the executable file might be covered by the GNU General Public License. | |
29 | * | |
30 | * This exception applies only to the code released by the | |
31 | * Free Software Foundation under the name GUILE. If you copy | |
32 | * code from other Free Software Foundation releases into a copy of | |
33 | * GUILE, as the General Public License permits, the exception does | |
34 | * not apply to the code that you add in this way. To avoid misleading | |
35 | * anyone as to the status of such modified files, you must delete | |
36 | * this exception notice from them. | |
37 | * | |
38 | * If you write modifications of your own for GUILE, it is your choice | |
39 | * whether to permit this exception to apply to your modifications. | |
82892bed | 40 | * If you do not wish that, delete this exception notice. */ |
1bbd0b84 GB |
41 | |
42 | /* Software engineering face-lift by Greg J. Badros, 11-Dec-1999, | |
43 | gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */ | |
44 | ||
0f2d19dd JB |
45 | \f |
46 | ||
6dbd0af5 MD |
47 | /* This file is read twice in order to produce debugging versions of |
48 | * scm_ceval and scm_apply. These functions, scm_deval and | |
49 | * scm_dapply, are produced when we define the preprocessor macro | |
50 | * DEVAL. The file is divided into sections which are treated | |
51 | * differently with respect to DEVAL. The heads of these sections are | |
52 | * marked with the string "SECTION:". | |
53 | */ | |
54 | ||
55 | ||
56 | /* SECTION: This code is compiled once. | |
0f2d19dd JB |
57 | */ |
58 | ||
59 | #ifndef DEVAL | |
60 | ||
d16332b3 | 61 | /* We need this to get the definitions for HAVE_ALLOCA_H, etc. */ |
a0599745 | 62 | #include "libguile/scmconfig.h" |
d16332b3 | 63 | |
48b96f4b JB |
64 | /* AIX requires this to be the first thing in the file. The #pragma |
65 | directive is indented so pre-ANSI compilers will ignore it, rather | |
66 | than choke on it. */ | |
5862b540 | 67 | #ifndef __GNUC__ |
48b96f4b JB |
68 | # if HAVE_ALLOCA_H |
69 | # include <alloca.h> | |
70 | # else | |
71 | # ifdef _AIX | |
72 | #pragma alloca | |
73 | # else | |
74 | # ifndef alloca /* predefined by HP cc +Olibcalls */ | |
75 | char *alloca (); | |
76 | # endif | |
77 | # endif | |
78 | # endif | |
79 | #endif | |
80 | ||
a0599745 MD |
81 | #include "libguile/_scm.h" |
82 | #include "libguile/debug.h" | |
09074dbf | 83 | #include "libguile/dynwind.h" |
a0599745 MD |
84 | #include "libguile/alist.h" |
85 | #include "libguile/eq.h" | |
86 | #include "libguile/continuations.h" | |
87 | #include "libguile/throw.h" | |
88 | #include "libguile/smob.h" | |
89 | #include "libguile/macros.h" | |
90 | #include "libguile/procprop.h" | |
91 | #include "libguile/hashtab.h" | |
92 | #include "libguile/hash.h" | |
93 | #include "libguile/srcprop.h" | |
94 | #include "libguile/stackchk.h" | |
95 | #include "libguile/objects.h" | |
96 | #include "libguile/async.h" | |
97 | #include "libguile/feature.h" | |
98 | #include "libguile/modules.h" | |
99 | #include "libguile/ports.h" | |
100 | #include "libguile/root.h" | |
101 | #include "libguile/vectors.h" | |
549e6ec6 | 102 | #include "libguile/fluids.h" |
a513ead3 | 103 | #include "libguile/values.h" |
a0599745 MD |
104 | |
105 | #include "libguile/validate.h" | |
106 | #include "libguile/eval.h" | |
89efbff4 | 107 | |
0f2d19dd JB |
108 | \f |
109 | ||
6dbd0af5 MD |
110 | /* The evaluator contains a plethora of EVAL symbols. |
111 | * This is an attempt at explanation. | |
112 | * | |
113 | * The following macros should be used in code which is read twice | |
114 | * (where the choice of evaluator is hard soldered): | |
115 | * | |
116 | * SCM_CEVAL is the symbol used within one evaluator to call itself. | |
117 | * Originally, it is defined to scm_ceval, but is redefined to | |
118 | * scm_deval during the second pass. | |
119 | * | |
120 | * SIDEVAL corresponds to SCM_CEVAL, but is used in situations where | |
121 | * only side effects of expressions matter. All immediates are | |
122 | * ignored. | |
123 | * | |
6cb702da | 124 | * SCM_EVALIM is used when it is known that the expression is an |
6dbd0af5 MD |
125 | * immediate. (This macro never calls an evaluator.) |
126 | * | |
127 | * EVALCAR evaluates the car of an expression. | |
128 | * | |
129 | * EVALCELLCAR is like EVALCAR, but is used when it is known that the | |
130 | * car is a lisp cell. | |
131 | * | |
132 | * The following macros should be used in code which is read once | |
133 | * (where the choice of evaluator is dynamic): | |
134 | * | |
6cb702da | 135 | * SCM_XEVAL takes care of immediates without calling an evaluator. It |
6dbd0af5 MD |
136 | * then calls scm_ceval *or* scm_deval, depending on the debugging |
137 | * mode. | |
138 | * | |
6cb702da | 139 | * SCM_XEVALCAR corresponds to EVALCAR, but uses scm_ceval *or* scm_deval |
6dbd0af5 MD |
140 | * depending on the debugging mode. |
141 | * | |
142 | * The main motivation for keeping this plethora is efficiency | |
143 | * together with maintainability (=> locality of code). | |
144 | */ | |
145 | ||
6cb702da | 146 | #define SCM_CEVAL scm_ceval |
7d2b68a8 | 147 | #define SIDEVAL(x, env) if (SCM_NIMP (x)) SCM_CEVAL((x), (env)) |
6cb702da | 148 | |
7d2b68a8 MD |
149 | #define EVALCELLCAR(x, env) (SCM_SYMBOLP (SCM_CAR (x)) \ |
150 | ? *scm_lookupcar (x, env, 1) \ | |
151 | : SCM_CEVAL (SCM_CAR (x), env)) | |
0f2d19dd | 152 | |
22a52da1 | 153 | #define EVALCAR(x, env) (!SCM_CELLP (SCM_CAR (x)) \ |
7d2b68a8 MD |
154 | ? (SCM_IMP (SCM_CAR (x)) \ |
155 | ? SCM_EVALIM (SCM_CAR (x), env) \ | |
156 | : SCM_GLOC_VAL (SCM_CAR (x))) \ | |
157 | : EVALCELLCAR (x, env)) | |
0f2d19dd | 158 | |
e2806c10 | 159 | #define EXTEND_ENV SCM_EXTEND_ENV |
0f2d19dd JB |
160 | |
161 | #ifdef MEMOIZE_LOCALS | |
1cc91f1b | 162 | |
0f2d19dd | 163 | SCM * |
6e8d25a6 | 164 | scm_ilookup (SCM iloc, SCM env) |
0f2d19dd JB |
165 | { |
166 | register int ir = SCM_IFRAME (iloc); | |
167 | register SCM er = env; | |
168 | for (; 0 != ir; --ir) | |
169 | er = SCM_CDR (er); | |
170 | er = SCM_CAR (er); | |
171 | for (ir = SCM_IDIST (iloc); 0 != ir; --ir) | |
172 | er = SCM_CDR (er); | |
173 | if (SCM_ICDRP (iloc)) | |
a23afe53 MD |
174 | return SCM_CDRLOC (er); |
175 | return SCM_CARLOC (SCM_CDR (er)); | |
0f2d19dd JB |
176 | } |
177 | #endif | |
178 | ||
f8769b1d MV |
179 | #ifdef USE_THREADS |
180 | ||
181 | /* The Lookup Car Race | |
182 | - by Eva Luator | |
183 | ||
184 | Memoization of variables and special forms is done while executing | |
185 | the code for the first time. As long as there is only one thread | |
186 | everything is fine, but as soon as two threads execute the same | |
187 | code concurrently `for the first time' they can come into conflict. | |
188 | ||
189 | This memoization includes rewriting variable references into more | |
190 | efficient forms and expanding macros. Furthermore, macro expansion | |
191 | includes `compiling' special forms like `let', `cond', etc. into | |
192 | tree-code instructions. | |
193 | ||
194 | There shouldn't normally be a problem with memoizing local and | |
195 | global variable references (into ilocs and glocs), because all | |
196 | threads will mutate the code in *exactly* the same way and (if I | |
197 | read the C code correctly) it is not possible to observe a half-way | |
198 | mutated cons cell. The lookup procedure can handle this | |
199 | transparently without any critical sections. | |
200 | ||
201 | It is different with macro expansion, because macro expansion | |
202 | happens outside of the lookup procedure and can't be | |
203 | undone. Therefore it can't cope with it. It has to indicate | |
204 | failure when it detects a lost race and hope that the caller can | |
205 | handle it. Luckily, it turns out that this is the case. | |
206 | ||
207 | An example to illustrate this: Suppose that the follwing form will | |
208 | be memoized concurrently by two threads | |
209 | ||
210 | (let ((x 12)) x) | |
211 | ||
212 | Let's first examine the lookup of X in the body. The first thread | |
213 | decides that it has to find the symbol "x" in the environment and | |
214 | starts to scan it. Then the other thread takes over and actually | |
215 | overtakes the first. It looks up "x" and substitutes an | |
216 | appropriate iloc for it. Now the first thread continues and | |
217 | completes its lookup. It comes to exactly the same conclusions as | |
218 | the second one and could - without much ado - just overwrite the | |
219 | iloc with the same iloc. | |
220 | ||
221 | But let's see what will happen when the race occurs while looking | |
222 | up the symbol "let" at the start of the form. It could happen that | |
223 | the second thread interrupts the lookup of the first thread and not | |
224 | only substitutes a gloc for it but goes right ahead and replaces it | |
225 | with the compiled form (#@let* (x 12) x). Now, when the first | |
226 | thread completes its lookup, it would replace the #@let* with a | |
227 | gloc pointing to the "let" binding, effectively reverting the form | |
228 | to (let (x 12) x). This is wrong. It has to detect that it has | |
229 | lost the race and the evaluator has to reconsider the changed form | |
230 | completely. | |
231 | ||
232 | This race condition could be resolved with some kind of traffic | |
233 | light (like mutexes) around scm_lookupcar, but I think that it is | |
234 | best to avoid them in this case. They would serialize memoization | |
235 | completely and because lookup involves calling arbitrary Scheme | |
236 | code (via the lookup-thunk), threads could be blocked for an | |
237 | arbitrary amount of time or even deadlock. But with the current | |
238 | solution a lot of unnecessary work is potentially done. */ | |
239 | ||
240 | /* SCM_LOOKUPCAR1 is was SCM_LOOKUPCAR used to be but is allowed to | |
241 | return NULL to indicate a failed lookup due to some race conditions | |
242 | between threads. This only happens when VLOC is the first cell of | |
243 | a special form that will eventually be memoized (like `let', etc.) | |
244 | In that case the whole lookup is bogus and the caller has to | |
245 | reconsider the complete special form. | |
246 | ||
247 | SCM_LOOKUPCAR is still there, of course. It just calls | |
248 | SCM_LOOKUPCAR1 and aborts on recieving NULL. So SCM_LOOKUPCAR | |
249 | should only be called when it is known that VLOC is not the first | |
250 | pair of a special form. Otherwise, use SCM_LOOKUPCAR1 and check | |
26d5b9b4 MD |
251 | for NULL. I think I've found the only places where this |
252 | applies. */ | |
f8769b1d MV |
253 | |
254 | #endif /* USE_THREADS */ | |
1cc91f1b | 255 | |
f25f761d GH |
256 | SCM_SYMBOL (scm_unbound_variable_key, "unbound-variable"); |
257 | ||
d0b7bad7 | 258 | #ifdef USE_THREADS |
8ecf1f13 | 259 | static SCM * |
26d5b9b4 | 260 | scm_lookupcar1 (SCM vloc, SCM genv, int check) |
d0b7bad7 MD |
261 | #else |
262 | SCM * | |
26d5b9b4 | 263 | scm_lookupcar (SCM vloc, SCM genv, int check) |
d0b7bad7 | 264 | #endif |
0f2d19dd JB |
265 | { |
266 | SCM env = genv; | |
e3173f93 JB |
267 | register SCM *al, fl, var = SCM_CAR (vloc); |
268 | #ifdef USE_THREADS | |
269 | register SCM var2 = var; | |
270 | #endif | |
0f2d19dd JB |
271 | #ifdef MEMOIZE_LOCALS |
272 | register SCM iloc = SCM_ILOC00; | |
273 | #endif | |
274 | for (; SCM_NIMP (env); env = SCM_CDR (env)) | |
275 | { | |
790071cd | 276 | if (!SCM_CONSP (SCM_CAR (env))) |
0f2d19dd | 277 | break; |
a23afe53 | 278 | al = SCM_CARLOC (env); |
0f2d19dd JB |
279 | for (fl = SCM_CAR (*al); SCM_NIMP (fl); fl = SCM_CDR (fl)) |
280 | { | |
281 | if (SCM_NCONSP (fl)) | |
33b97402 | 282 | { |
cf498326 | 283 | if (SCM_EQ_P (fl, var)) |
0f2d19dd JB |
284 | { |
285 | #ifdef MEMOIZE_LOCALS | |
f8769b1d | 286 | #ifdef USE_THREADS |
cf498326 | 287 | if (! SCM_EQ_P (SCM_CAR (vloc), var)) |
f8769b1d MV |
288 | goto race; |
289 | #endif | |
3201d763 | 290 | SCM_SET_CELL_WORD_0 (vloc, SCM_UNPACK (iloc) + SCM_ICDR); |
0f2d19dd | 291 | #endif |
a23afe53 | 292 | return SCM_CDRLOC (*al); |
0f2d19dd | 293 | } |
33b97402 MD |
294 | else |
295 | break; | |
296 | } | |
a23afe53 | 297 | al = SCM_CDRLOC (*al); |
cf498326 | 298 | if (SCM_EQ_P (SCM_CAR (fl), var)) |
0f2d19dd JB |
299 | { |
300 | #ifdef MEMOIZE_LOCALS | |
cf7c17e9 | 301 | #ifndef SCM_RECKLESS /* letrec inits to SCM_UNDEFINED */ |
0f2d19dd JB |
302 | if (SCM_UNBNDP (SCM_CAR (*al))) |
303 | { | |
304 | env = SCM_EOL; | |
305 | goto errout; | |
306 | } | |
f8769b1d MV |
307 | #endif |
308 | #ifdef USE_THREADS | |
309 | if (SCM_CAR (vloc) != var) | |
310 | goto race; | |
0f2d19dd | 311 | #endif |
a23afe53 | 312 | SCM_SETCAR (vloc, iloc); |
0f2d19dd | 313 | #endif |
a23afe53 | 314 | return SCM_CARLOC (*al); |
0f2d19dd JB |
315 | } |
316 | #ifdef MEMOIZE_LOCALS | |
3201d763 | 317 | iloc = SCM_PACK (SCM_UNPACK (iloc) + SCM_IDINC); |
0f2d19dd JB |
318 | #endif |
319 | } | |
320 | #ifdef MEMOIZE_LOCALS | |
3201d763 | 321 | iloc = SCM_PACK ((~SCM_IDSTMSK) & (SCM_UNPACK(iloc) + SCM_IFRINC)); |
0f2d19dd JB |
322 | #endif |
323 | } | |
324 | { | |
325 | SCM top_thunk, vcell; | |
790071cd | 326 | if (SCM_NIMP (env)) |
0f2d19dd | 327 | { |
790071cd | 328 | top_thunk = SCM_CAR (env); /* env now refers to a top level env thunk */ |
0f2d19dd JB |
329 | env = SCM_CDR (env); |
330 | } | |
331 | else | |
332 | top_thunk = SCM_BOOL_F; | |
333 | vcell = scm_sym2vcell (var, top_thunk, SCM_BOOL_F); | |
cf498326 | 334 | if (SCM_FALSEP (vcell)) |
0f2d19dd JB |
335 | goto errout; |
336 | else | |
337 | var = vcell; | |
338 | } | |
cf7c17e9 | 339 | #ifndef SCM_RECKLESS |
0f2d19dd JB |
340 | if (SCM_NNULLP (env) || SCM_UNBNDP (SCM_CDR (var))) |
341 | { | |
342 | var = SCM_CAR (var); | |
343 | errout: | |
f5bf2977 | 344 | /* scm_everr (vloc, genv,...) */ |
26d5b9b4 | 345 | if (check) |
f25f761d GH |
346 | { |
347 | if (SCM_NULLP (env)) | |
70d63753 | 348 | scm_error (scm_unbound_variable_key, NULL, "Unbound variable: ~S", |
f25f761d GH |
349 | scm_cons (var, SCM_EOL), SCM_BOOL_F); |
350 | else | |
70d63753 | 351 | scm_misc_error (NULL, "Damaged environment: ~S", |
f25f761d GH |
352 | scm_cons (var, SCM_EOL)); |
353 | } | |
09e4d064 DH |
354 | else { |
355 | /* A variable could not be found, but we shall not throw an error. */ | |
356 | static SCM undef_object = SCM_UNDEFINED; | |
3201d763 | 357 | return &undef_object; |
09e4d064 | 358 | } |
0f2d19dd JB |
359 | } |
360 | #endif | |
f8769b1d MV |
361 | #ifdef USE_THREADS |
362 | if (SCM_CAR (vloc) != var2) | |
363 | { | |
364 | /* Some other thread has changed the very cell we are working | |
365 | on. In effect, it must have done our job or messed it up | |
366 | completely. */ | |
367 | race: | |
368 | var = SCM_CAR (vloc); | |
3201d763 | 369 | if (SCM_ITAG3 (var) == scm_tc3_cons_gloc) |
f8769b1d MV |
370 | return SCM_GLOC_VAL_LOC (var); |
371 | #ifdef MEMOIZE_LOCALS | |
d1ca2c64 | 372 | if (SCM_ITAG7 (var) == SCM_ITAG7 (SCM_ILOC00)) |
f8769b1d MV |
373 | return scm_ilookup (var, genv); |
374 | #endif | |
375 | /* We can't cope with anything else than glocs and ilocs. When | |
376 | a special form has been memoized (i.e. `let' into `#@let') we | |
377 | return NULL and expect the calling function to do the right | |
378 | thing. For the evaluator, this means going back and redoing | |
379 | the dispatch on the car of the form. */ | |
380 | return NULL; | |
381 | } | |
382 | #endif /* USE_THREADS */ | |
383 | ||
3201d763 | 384 | SCM_SET_CELL_WORD_0 (vloc, SCM_UNPACK (var) + scm_tc3_cons_gloc); |
0f2d19dd | 385 | /* Except wait...what if the var is not a vcell, |
f8769b1d | 386 | * but syntax or something.... */ |
a23afe53 | 387 | return SCM_CDRLOC (var); |
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 | |
0f2d19dd | 403 | SCM |
6e8d25a6 | 404 | scm_unmemocar (SCM form, SCM env) |
0f2d19dd | 405 | { |
0f2d19dd JB |
406 | SCM c; |
407 | ||
408 | if (SCM_IMP (form)) | |
409 | return form; | |
410 | c = SCM_CAR (form); | |
b0c54567 | 411 | if (SCM_ITAG3 (c) == scm_tc3_cons_gloc) |
a963f787 | 412 | SCM_SETCAR (form, SCM_GLOC_SYM (c)); |
0f2d19dd | 413 | #ifdef MEMOIZE_LOCALS |
6dbd0af5 | 414 | #ifdef DEBUG_EXTENSIONS |
0f2d19dd JB |
415 | else if (SCM_ILOCP (c)) |
416 | { | |
b0c54567 DH |
417 | int ir; |
418 | ||
0f2d19dd JB |
419 | for (ir = SCM_IFRAME (c); ir != 0; --ir) |
420 | env = SCM_CDR (env); | |
421 | env = SCM_CAR (SCM_CAR (env)); | |
422 | for (ir = SCM_IDIST (c); ir != 0; --ir) | |
423 | env = SCM_CDR (env); | |
a23afe53 | 424 | SCM_SETCAR (form, SCM_ICDRP (c) ? env : SCM_CAR (env)); |
0f2d19dd | 425 | } |
6dbd0af5 | 426 | #endif |
0f2d19dd JB |
427 | #endif |
428 | return form; | |
429 | } | |
430 | ||
1cc91f1b | 431 | |
0f2d19dd | 432 | SCM |
6e8d25a6 | 433 | scm_eval_car (SCM pair, SCM env) |
0f2d19dd | 434 | { |
6cb702da | 435 | return SCM_XEVALCAR (pair, env); |
0f2d19dd JB |
436 | } |
437 | ||
438 | \f | |
439 | /* | |
440 | * The following rewrite expressions and | |
441 | * some memoized forms have different syntax | |
442 | */ | |
443 | ||
3eeba8d4 JB |
444 | const char scm_s_expression[] = "missing or extra expression"; |
445 | const char scm_s_test[] = "bad test"; | |
446 | const char scm_s_body[] = "bad body"; | |
447 | const char scm_s_bindings[] = "bad bindings"; | |
185ab0ef | 448 | const char scm_s_duplicate_bindings[] = "duplicate bindings"; |
3eeba8d4 JB |
449 | const char scm_s_variable[] = "bad variable"; |
450 | const char scm_s_clauses[] = "bad or missing clauses"; | |
451 | const char scm_s_formals[] = "bad formals"; | |
5280aaca | 452 | const char scm_s_duplicate_formals[] = "duplicate formals"; |
0f2d19dd | 453 | |
85db4a2c DH |
454 | SCM_GLOBAL_SYMBOL (scm_sym_dot, "."); |
455 | SCM_GLOBAL_SYMBOL (scm_sym_arrow, "=>"); | |
456 | SCM_GLOBAL_SYMBOL (scm_sym_else, "else"); | |
457 | SCM_GLOBAL_SYMBOL (scm_sym_unquote, "unquote"); | |
458 | SCM_GLOBAL_SYMBOL (scm_sym_uq_splicing, "unquote-splicing"); | |
81123e6d MD |
459 | |
460 | SCM scm_f_apply; | |
b8229a3b | 461 | |
6dbd0af5 | 462 | #ifdef DEBUG_EXTENSIONS |
85db4a2c DH |
463 | SCM_GLOBAL_SYMBOL (scm_sym_enter_frame, "enter-frame"); |
464 | SCM_GLOBAL_SYMBOL (scm_sym_apply_frame, "apply-frame"); | |
465 | SCM_GLOBAL_SYMBOL (scm_sym_exit_frame, "exit-frame"); | |
466 | SCM_GLOBAL_SYMBOL (scm_sym_trace, "trace"); | |
6dbd0af5 | 467 | #endif |
0f2d19dd | 468 | |
0f2d19dd | 469 | |
26d5b9b4 MD |
470 | /* Check that the body denoted by XORIG is valid and rewrite it into |
471 | its internal form. The internal form of a body is just the body | |
472 | itself, but prefixed with an ISYM that denotes to what kind of | |
473 | outer construct this body belongs. A lambda body starts with | |
474 | SCM_IM_LAMBDA, for example, a body of a let starts with SCM_IM_LET, | |
475 | etc. The one exception is a body that belongs to a letrec that has | |
476 | been formed by rewriting internal defines: it starts with | |
477 | SCM_IM_DEFINE. */ | |
478 | ||
479 | /* XXX - Besides controlling the rewriting of internal defines, the | |
480 | additional ISYM could be used for improved error messages. | |
481 | This is not done yet. */ | |
482 | ||
483 | static SCM | |
6e8d25a6 | 484 | scm_m_body (SCM op, SCM xorig, const char *what) |
26d5b9b4 | 485 | { |
160bb34a | 486 | SCM_ASSYNT (scm_ilength (xorig) >= 1, scm_s_expression, what); |
26d5b9b4 MD |
487 | |
488 | /* Don't add another ISYM if one is present already. */ | |
489 | if (SCM_ISYMP (SCM_CAR (xorig))) | |
490 | return xorig; | |
491 | ||
492 | /* Retain possible doc string. */ | |
44d3cb0d | 493 | if (!SCM_CONSP (SCM_CAR (xorig))) |
26d5b9b4 MD |
494 | { |
495 | if (SCM_NNULLP (SCM_CDR(xorig))) | |
496 | return scm_cons (SCM_CAR (xorig), | |
497 | scm_m_body (op, SCM_CDR(xorig), what)); | |
498 | return xorig; | |
499 | } | |
500 | ||
ab66ae47 | 501 | return scm_cons (op, xorig); |
26d5b9b4 MD |
502 | } |
503 | ||
b8229a3b | 504 | SCM_SYNTAX(s_quote,"quote", scm_makmmacro, scm_m_quote); |
2f0d1375 | 505 | SCM_GLOBAL_SYMBOL(scm_sym_quote, s_quote); |
1cc91f1b | 506 | |
0f2d19dd | 507 | SCM |
6e8d25a6 | 508 | scm_m_quote (SCM xorig, SCM env) |
0f2d19dd | 509 | { |
26d5b9b4 MD |
510 | SCM x = scm_copy_tree (SCM_CDR (xorig)); |
511 | ||
160bb34a | 512 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, scm_s_expression, s_quote); |
3a3111a8 | 513 | return scm_cons (SCM_IM_QUOTE, x); |
0f2d19dd JB |
514 | } |
515 | ||
516 | ||
1cc91f1b | 517 | |
b8229a3b | 518 | SCM_SYNTAX(s_begin, "begin", scm_makmmacro, scm_m_begin); |
2f0d1375 | 519 | SCM_GLOBAL_SYMBOL(scm_sym_begin, s_begin); |
b8229a3b | 520 | |
0f2d19dd | 521 | SCM |
6e8d25a6 | 522 | scm_m_begin (SCM xorig, SCM env) |
0f2d19dd | 523 | { |
160bb34a | 524 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) >= 1, scm_s_expression, s_begin); |
3a3111a8 | 525 | return scm_cons (SCM_IM_BEGIN, SCM_CDR (xorig)); |
0f2d19dd JB |
526 | } |
527 | ||
b8229a3b | 528 | SCM_SYNTAX(s_if, "if", scm_makmmacro, scm_m_if); |
2f0d1375 | 529 | SCM_GLOBAL_SYMBOL(scm_sym_if, s_if); |
1cc91f1b | 530 | |
0f2d19dd | 531 | SCM |
6e8d25a6 | 532 | scm_m_if (SCM xorig, SCM env) |
0f2d19dd JB |
533 | { |
534 | int len = scm_ilength (SCM_CDR (xorig)); | |
160bb34a | 535 | SCM_ASSYNT (len >= 2 && len <= 3, scm_s_expression, "if"); |
3a3111a8 | 536 | return scm_cons (SCM_IM_IF, SCM_CDR (xorig)); |
0f2d19dd JB |
537 | } |
538 | ||
539 | ||
89efbff4 MD |
540 | /* Will go into the RnRS module when Guile is factorized. |
541 | SCM_SYNTAX(scm_s_set_x,"set!", scm_makmmacro, scm_m_set_x); */ | |
542 | const char scm_s_set_x[] = "set!"; | |
543 | SCM_GLOBAL_SYMBOL(scm_sym_set_x, scm_s_set_x); | |
1cc91f1b | 544 | |
0f2d19dd | 545 | SCM |
6e8d25a6 | 546 | scm_m_set_x (SCM xorig, SCM env) |
0f2d19dd | 547 | { |
6dbd0af5 | 548 | SCM x = SCM_CDR (xorig); |
160bb34a DH |
549 | SCM_ASSYNT (2 == scm_ilength (x), scm_s_expression, scm_s_set_x); |
550 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (x)), scm_s_variable, scm_s_set_x); | |
3a3111a8 | 551 | return scm_cons (SCM_IM_SET_X, x); |
0f2d19dd JB |
552 | } |
553 | ||
554 | ||
b8229a3b | 555 | SCM_SYNTAX(s_and, "and", scm_makmmacro, scm_m_and); |
2f0d1375 | 556 | SCM_GLOBAL_SYMBOL(scm_sym_and, s_and); |
1cc91f1b | 557 | |
0f2d19dd | 558 | SCM |
6e8d25a6 | 559 | scm_m_and (SCM xorig, SCM env) |
0f2d19dd JB |
560 | { |
561 | int len = scm_ilength (SCM_CDR (xorig)); | |
160bb34a | 562 | SCM_ASSYNT (len >= 0, scm_s_test, s_and); |
0f2d19dd | 563 | if (len >= 1) |
3a3111a8 | 564 | return scm_cons (SCM_IM_AND, SCM_CDR (xorig)); |
0f2d19dd JB |
565 | else |
566 | return SCM_BOOL_T; | |
567 | } | |
568 | ||
b8229a3b | 569 | SCM_SYNTAX(s_or,"or", scm_makmmacro, scm_m_or); |
2f0d1375 | 570 | SCM_GLOBAL_SYMBOL(scm_sym_or,s_or); |
1cc91f1b | 571 | |
0f2d19dd | 572 | SCM |
6e8d25a6 | 573 | scm_m_or (SCM xorig, SCM env) |
0f2d19dd JB |
574 | { |
575 | int len = scm_ilength (SCM_CDR (xorig)); | |
160bb34a | 576 | SCM_ASSYNT (len >= 0, scm_s_test, s_or); |
0f2d19dd | 577 | if (len >= 1) |
3a3111a8 | 578 | return scm_cons (SCM_IM_OR, SCM_CDR (xorig)); |
0f2d19dd JB |
579 | else |
580 | return SCM_BOOL_F; | |
581 | } | |
582 | ||
583 | ||
b8229a3b | 584 | SCM_SYNTAX(s_case, "case", scm_makmmacro, scm_m_case); |
2f0d1375 | 585 | SCM_GLOBAL_SYMBOL(scm_sym_case, s_case); |
1cc91f1b | 586 | |
0f2d19dd | 587 | SCM |
6e8d25a6 | 588 | scm_m_case (SCM xorig, SCM env) |
0f2d19dd | 589 | { |
26d5b9b4 | 590 | SCM proc, cdrx = scm_list_copy (SCM_CDR (xorig)), x = cdrx; |
160bb34a | 591 | SCM_ASSYNT (scm_ilength (x) >= 2, scm_s_clauses, s_case); |
0f2d19dd JB |
592 | while (SCM_NIMP (x = SCM_CDR (x))) |
593 | { | |
594 | proc = SCM_CAR (x); | |
160bb34a | 595 | SCM_ASSYNT (scm_ilength (proc) >= 2, scm_s_clauses, s_case); |
6cb702da | 596 | SCM_ASSYNT (scm_ilength (SCM_CAR (proc)) >= 0 |
4567ed78 DH |
597 | || (SCM_EQ_P (scm_sym_else, SCM_CAR (proc)) |
598 | && SCM_NULLP (SCM_CDR (x))), | |
160bb34a | 599 | scm_s_clauses, s_case); |
0f2d19dd | 600 | } |
3a3111a8 | 601 | return scm_cons (SCM_IM_CASE, cdrx); |
0f2d19dd JB |
602 | } |
603 | ||
604 | ||
b8229a3b | 605 | SCM_SYNTAX(s_cond, "cond", scm_makmmacro, scm_m_cond); |
2f0d1375 | 606 | SCM_GLOBAL_SYMBOL(scm_sym_cond, s_cond); |
b8229a3b | 607 | |
1cc91f1b | 608 | |
0f2d19dd | 609 | SCM |
6e8d25a6 | 610 | scm_m_cond (SCM xorig, SCM env) |
0f2d19dd | 611 | { |
26d5b9b4 | 612 | SCM arg1, cdrx = scm_list_copy (SCM_CDR (xorig)), x = cdrx; |
0f2d19dd | 613 | int len = scm_ilength (x); |
160bb34a | 614 | SCM_ASSYNT (len >= 1, scm_s_clauses, s_cond); |
0f2d19dd JB |
615 | while (SCM_NIMP (x)) |
616 | { | |
617 | arg1 = SCM_CAR (x); | |
618 | len = scm_ilength (arg1); | |
160bb34a | 619 | SCM_ASSYNT (len >= 1, scm_s_clauses, s_cond); |
cf498326 | 620 | if (SCM_EQ_P (scm_sym_else, SCM_CAR (arg1))) |
0f2d19dd | 621 | { |
6cb702da | 622 | SCM_ASSYNT (SCM_NULLP (SCM_CDR (x)) && len >= 2, |
160bb34a | 623 | "bad ELSE clause", s_cond); |
a23afe53 | 624 | SCM_SETCAR (arg1, SCM_BOOL_T); |
0f2d19dd | 625 | } |
cf498326 | 626 | if (len >= 2 && SCM_EQ_P (scm_sym_arrow, SCM_CAR (SCM_CDR (arg1)))) |
6cb702da | 627 | SCM_ASSYNT (3 == len && SCM_NIMP (SCM_CAR (SCM_CDR (SCM_CDR (arg1)))), |
160bb34a | 628 | "bad recipient", s_cond); |
0f2d19dd JB |
629 | x = SCM_CDR (x); |
630 | } | |
3a3111a8 | 631 | return scm_cons (SCM_IM_COND, cdrx); |
0f2d19dd JB |
632 | } |
633 | ||
b8229a3b | 634 | SCM_SYNTAX(s_lambda, "lambda", scm_makmmacro, scm_m_lambda); |
2f0d1375 | 635 | SCM_GLOBAL_SYMBOL(scm_sym_lambda, s_lambda); |
1cc91f1b | 636 | |
5280aaca MV |
637 | /* Return #t if OBJ is `eq?' to one of the elements of LIST or to the |
638 | cdr of the last cons. (Thus, LIST is not required to be a proper | |
639 | list and when OBJ also found in the improper ending.) */ | |
640 | ||
641 | static int | |
642 | scm_c_improper_memq (SCM obj, SCM list) | |
643 | { | |
644 | for (; SCM_CONSP (list); list = SCM_CDR (list)) | |
645 | { | |
646 | if (SCM_EQ_P (SCM_CAR (list), obj)) | |
647 | return SCM_BOOL_T; | |
648 | } | |
649 | return SCM_EQ_P (list, obj); | |
650 | } | |
651 | ||
0f2d19dd | 652 | SCM |
6e8d25a6 | 653 | scm_m_lambda (SCM xorig, SCM env) |
0f2d19dd JB |
654 | { |
655 | SCM proc, x = SCM_CDR (xorig); | |
26d5b9b4 | 656 | if (scm_ilength (x) < 2) |
0f2d19dd JB |
657 | goto badforms; |
658 | proc = SCM_CAR (x); | |
33b97402 MD |
659 | if (SCM_NULLP (proc)) |
660 | goto memlambda; | |
cf498326 | 661 | if (SCM_EQ_P (SCM_IM_LET, proc)) /* named let */ |
26d5b9b4 | 662 | goto memlambda; |
33b97402 MD |
663 | if (SCM_IMP (proc)) |
664 | goto badforms; | |
665 | if (SCM_SYMBOLP (proc)) | |
666 | goto memlambda; | |
667 | if (SCM_NCONSP (proc)) | |
668 | goto badforms; | |
669 | while (SCM_NIMP (proc)) | |
0f2d19dd | 670 | { |
33b97402 MD |
671 | if (SCM_NCONSP (proc)) |
672 | { | |
0f2d19dd | 673 | if (!SCM_SYMBOLP (proc)) |
33b97402 MD |
674 | goto badforms; |
675 | else | |
676 | goto memlambda; | |
677 | } | |
0c95b57d | 678 | if (!SCM_SYMBOLP (SCM_CAR (proc))) |
0f2d19dd | 679 | goto badforms; |
5280aaca | 680 | else if (scm_c_improper_memq (SCM_CAR(proc), SCM_CDR(proc))) |
db4b4ca6 | 681 | scm_misc_error (s_lambda, scm_s_duplicate_formals, SCM_EOL); |
0f2d19dd JB |
682 | proc = SCM_CDR (proc); |
683 | } | |
ff467021 | 684 | if (SCM_NNULLP (proc)) |
26d5b9b4 MD |
685 | { |
686 | badforms: | |
db4b4ca6 | 687 | scm_misc_error (s_lambda, scm_s_formals, SCM_EOL); |
26d5b9b4 MD |
688 | } |
689 | ||
690 | memlambda: | |
3a3111a8 MD |
691 | return scm_cons2 (SCM_IM_LAMBDA, SCM_CAR (x), |
692 | scm_m_body (SCM_IM_LAMBDA, SCM_CDR (x), s_lambda)); | |
0f2d19dd JB |
693 | } |
694 | ||
b8229a3b | 695 | SCM_SYNTAX(s_letstar,"let*", scm_makmmacro, scm_m_letstar); |
2f0d1375 | 696 | SCM_GLOBAL_SYMBOL(scm_sym_letstar,s_letstar); |
0f2d19dd | 697 | |
1cc91f1b | 698 | |
0f2d19dd | 699 | SCM |
6e8d25a6 | 700 | scm_m_letstar (SCM xorig, SCM env) |
0f2d19dd JB |
701 | { |
702 | SCM x = SCM_CDR (xorig), arg1, proc, vars = SCM_EOL, *varloc = &vars; | |
703 | int len = scm_ilength (x); | |
160bb34a | 704 | SCM_ASSYNT (len >= 2, scm_s_body, s_letstar); |
0f2d19dd | 705 | proc = SCM_CAR (x); |
160bb34a | 706 | SCM_ASSYNT (scm_ilength (proc) >= 0, scm_s_bindings, s_letstar); |
ff467021 | 707 | while (SCM_NIMP (proc)) |
0f2d19dd JB |
708 | { |
709 | arg1 = SCM_CAR (proc); | |
160bb34a DH |
710 | SCM_ASSYNT (2 == scm_ilength (arg1), scm_s_bindings, s_letstar); |
711 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (arg1)), scm_s_variable, s_letstar); | |
0f2d19dd | 712 | *varloc = scm_cons2 (SCM_CAR (arg1), SCM_CAR (SCM_CDR (arg1)), SCM_EOL); |
a23afe53 | 713 | varloc = SCM_CDRLOC (SCM_CDR (*varloc)); |
0f2d19dd JB |
714 | proc = SCM_CDR (proc); |
715 | } | |
716 | x = scm_cons (vars, SCM_CDR (x)); | |
26d5b9b4 | 717 | |
3a3111a8 MD |
718 | return scm_cons2 (SCM_IM_LETSTAR, SCM_CAR (x), |
719 | scm_m_body (SCM_IM_LETSTAR, SCM_CDR (x), s_letstar)); | |
0f2d19dd JB |
720 | } |
721 | ||
722 | /* DO gets the most radically altered syntax | |
723 | (do ((<var1> <init1> <step1>) | |
724 | (<var2> <init2>) | |
725 | ... ) | |
726 | (<test> <return>) | |
727 | <body>) | |
728 | ;; becomes | |
729 | (do_mem (varn ... var2 var1) | |
730 | (<init1> <init2> ... <initn>) | |
731 | (<test> <return>) | |
732 | (<body>) | |
733 | <step1> <step2> ... <stepn>) ;; missing steps replaced by var | |
734 | */ | |
735 | ||
b8229a3b | 736 | SCM_SYNTAX(s_do, "do", scm_makmmacro, scm_m_do); |
2f0d1375 | 737 | SCM_GLOBAL_SYMBOL(scm_sym_do, s_do); |
1cc91f1b | 738 | |
0f2d19dd | 739 | SCM |
6e8d25a6 | 740 | scm_m_do (SCM xorig, SCM env) |
0f2d19dd JB |
741 | { |
742 | SCM x = SCM_CDR (xorig), arg1, proc; | |
743 | SCM vars = SCM_EOL, inits = SCM_EOL, steps = SCM_EOL; | |
744 | SCM *initloc = &inits, *steploc = &steps; | |
745 | int len = scm_ilength (x); | |
160bb34a | 746 | SCM_ASSYNT (len >= 2, scm_s_test, "do"); |
0f2d19dd | 747 | proc = SCM_CAR (x); |
160bb34a | 748 | SCM_ASSYNT (scm_ilength (proc) >= 0, scm_s_bindings, "do"); |
ff467021 | 749 | while (SCM_NIMP(proc)) |
0f2d19dd JB |
750 | { |
751 | arg1 = SCM_CAR (proc); | |
752 | len = scm_ilength (arg1); | |
160bb34a DH |
753 | SCM_ASSYNT (2 == len || 3 == len, scm_s_bindings, "do"); |
754 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (arg1)), scm_s_variable, "do"); | |
0f2d19dd JB |
755 | /* vars reversed here, inits and steps reversed at evaluation */ |
756 | vars = scm_cons (SCM_CAR (arg1), vars); /* variable */ | |
757 | arg1 = SCM_CDR (arg1); | |
758 | *initloc = scm_cons (SCM_CAR (arg1), SCM_EOL); /* init */ | |
a23afe53 | 759 | initloc = SCM_CDRLOC (*initloc); |
0f2d19dd JB |
760 | arg1 = SCM_CDR (arg1); |
761 | *steploc = scm_cons (SCM_IMP (arg1) ? SCM_CAR (vars) : SCM_CAR (arg1), SCM_EOL); /* step */ | |
a23afe53 | 762 | steploc = SCM_CDRLOC (*steploc); |
0f2d19dd JB |
763 | proc = SCM_CDR (proc); |
764 | } | |
765 | x = SCM_CDR (x); | |
160bb34a | 766 | SCM_ASSYNT (scm_ilength (SCM_CAR (x)) >= 1, scm_s_test, "do"); |
0f2d19dd JB |
767 | x = scm_cons2 (SCM_CAR (x), SCM_CDR (x), steps); |
768 | x = scm_cons2 (vars, inits, x); | |
3a3111a8 | 769 | return scm_cons (SCM_IM_DO, x); |
0f2d19dd JB |
770 | } |
771 | ||
6dbd0af5 MD |
772 | /* evalcar is small version of inline EVALCAR when we don't care about |
773 | * speed | |
774 | */ | |
775 | #define evalcar scm_eval_car | |
0f2d19dd | 776 | |
1cc91f1b | 777 | |
1bbd0b84 | 778 | static SCM iqq (SCM form, SCM env, int depth); |
1cc91f1b | 779 | |
b8229a3b | 780 | SCM_SYNTAX(s_quasiquote, "quasiquote", scm_makacro, scm_m_quasiquote); |
2f0d1375 | 781 | SCM_GLOBAL_SYMBOL(scm_sym_quasiquote, s_quasiquote); |
b8229a3b MS |
782 | |
783 | SCM | |
6e8d25a6 | 784 | scm_m_quasiquote (SCM xorig, SCM env) |
b8229a3b MS |
785 | { |
786 | SCM x = SCM_CDR (xorig); | |
160bb34a | 787 | SCM_ASSYNT (scm_ilength (x) == 1, scm_s_expression, s_quasiquote); |
b8229a3b MS |
788 | return iqq (SCM_CAR (x), env, 1); |
789 | } | |
790 | ||
791 | ||
0f2d19dd | 792 | static SCM |
22a52da1 | 793 | iqq (SCM form, SCM env, int depth) |
0f2d19dd JB |
794 | { |
795 | SCM tmp; | |
796 | int edepth = depth; | |
22a52da1 | 797 | if (SCM_IMP (form)) |
ff467021 | 798 | return form; |
0f2d19dd JB |
799 | if (SCM_VECTORP (form)) |
800 | { | |
b5c2579a | 801 | long i = SCM_VECTOR_LENGTH (form); |
0f2d19dd JB |
802 | SCM *data = SCM_VELTS (form); |
803 | tmp = SCM_EOL; | |
804 | for (; --i >= 0;) | |
805 | tmp = scm_cons (data[i], tmp); | |
806 | return scm_vector (iqq (tmp, env, depth)); | |
807 | } | |
22a52da1 | 808 | if (!SCM_CONSP (form)) |
ff467021 | 809 | return form; |
0f2d19dd | 810 | tmp = SCM_CAR (form); |
cf498326 | 811 | if (SCM_EQ_P (scm_sym_quasiquote, tmp)) |
0f2d19dd JB |
812 | { |
813 | depth++; | |
814 | goto label; | |
815 | } | |
cf498326 | 816 | if (SCM_EQ_P (scm_sym_unquote, tmp)) |
0f2d19dd JB |
817 | { |
818 | --depth; | |
819 | label: | |
820 | form = SCM_CDR (form); | |
0c95b57d GB |
821 | SCM_ASSERT (SCM_ECONSP (form) && SCM_NULLP (SCM_CDR (form)), |
822 | form, SCM_ARG1, s_quasiquote); | |
0f2d19dd JB |
823 | if (0 == depth) |
824 | return evalcar (form, env); | |
825 | return scm_cons2 (tmp, iqq (SCM_CAR (form), env, depth), SCM_EOL); | |
826 | } | |
22a52da1 | 827 | if (SCM_CONSP (tmp) && (SCM_EQ_P (scm_sym_uq_splicing, SCM_CAR (tmp)))) |
0f2d19dd JB |
828 | { |
829 | tmp = SCM_CDR (tmp); | |
830 | if (0 == --edepth) | |
831 | return scm_append (scm_cons2 (evalcar (tmp, env), iqq (SCM_CDR (form), env, depth), SCM_EOL)); | |
832 | } | |
833 | return scm_cons (iqq (SCM_CAR (form), env, edepth), iqq (SCM_CDR (form), env, depth)); | |
834 | } | |
835 | ||
836 | /* Here are acros which return values rather than code. */ | |
837 | ||
a570e93a MD |
838 | SCM_SYNTAX (s_delay, "delay", scm_makmmacro, scm_m_delay); |
839 | SCM_GLOBAL_SYMBOL (scm_sym_delay, s_delay); | |
1cc91f1b | 840 | |
0f2d19dd | 841 | SCM |
6e8d25a6 | 842 | scm_m_delay (SCM xorig, SCM env) |
0f2d19dd | 843 | { |
160bb34a | 844 | SCM_ASSYNT (scm_ilength (xorig) == 2, scm_s_expression, s_delay); |
a570e93a | 845 | return scm_cons2 (SCM_IM_DELAY, SCM_EOL, SCM_CDR (xorig)); |
0f2d19dd JB |
846 | } |
847 | ||
1cc91f1b | 848 | |
b8229a3b | 849 | SCM_SYNTAX(s_define, "define", scm_makmmacro, scm_m_define); |
2f0d1375 | 850 | SCM_GLOBAL_SYMBOL(scm_sym_define, s_define); |
1cc91f1b | 851 | |
0f2d19dd | 852 | SCM |
6e8d25a6 | 853 | scm_m_define (SCM x, SCM env) |
0f2d19dd JB |
854 | { |
855 | SCM proc, arg1 = x; | |
856 | x = SCM_CDR (x); | |
160bb34a | 857 | SCM_ASSYNT (scm_ilength (x) >= 2, scm_s_expression, s_define); |
0f2d19dd JB |
858 | proc = SCM_CAR (x); |
859 | x = SCM_CDR (x); | |
0c95b57d | 860 | while (SCM_CONSP (proc)) |
0f2d19dd | 861 | { /* nested define syntax */ |
2f0d1375 | 862 | x = scm_cons (scm_cons2 (scm_sym_lambda, SCM_CDR (proc), x), SCM_EOL); |
0f2d19dd JB |
863 | proc = SCM_CAR (proc); |
864 | } | |
160bb34a DH |
865 | SCM_ASSYNT (SCM_SYMBOLP (proc), scm_s_variable, s_define); |
866 | SCM_ASSYNT (1 == scm_ilength (x), scm_s_expression, s_define); | |
0f2d19dd JB |
867 | if (SCM_TOP_LEVEL (env)) |
868 | { | |
869 | x = evalcar (x, env); | |
6dbd0af5 | 870 | #ifdef DEBUG_EXTENSIONS |
80ea260c MD |
871 | if (SCM_REC_PROCNAMES_P && SCM_NIMP (x)) |
872 | { | |
873 | arg1 = x; | |
874 | proc: | |
875 | if (SCM_CLOSUREP (arg1) | |
876 | /* Only the first definition determines the name. */ | |
cf498326 | 877 | && SCM_FALSEP (scm_procedure_property (arg1, scm_sym_name))) |
2f0d1375 | 878 | scm_set_procedure_property_x (arg1, scm_sym_name, proc); |
22a52da1 DH |
879 | else if (SCM_MACROP (arg1) |
880 | /* Dirk::FIXME: Does the following test make sense? */ | |
881 | && !SCM_EQ_P (SCM_MACRO_CODE (arg1), arg1)) | |
80ea260c | 882 | { |
22a52da1 | 883 | arg1 = SCM_MACRO_CODE (arg1); |
80ea260c MD |
884 | goto proc; |
885 | } | |
886 | } | |
6dbd0af5 | 887 | #endif |
6cb702da | 888 | arg1 = scm_sym2vcell (proc, scm_env_top_level (env), SCM_BOOL_T); |
a23afe53 | 889 | SCM_SETCDR (arg1, x); |
0f2d19dd | 890 | #ifdef SICP |
2f0d1375 | 891 | return scm_cons2 (scm_sym_quote, SCM_CAR (arg1), SCM_EOL); |
0f2d19dd JB |
892 | #else |
893 | return SCM_UNSPECIFIED; | |
894 | #endif | |
895 | } | |
896 | return scm_cons2 (SCM_IM_DEFINE, proc, x); | |
897 | } | |
6dbd0af5 | 898 | |
0f2d19dd JB |
899 | /* end of acros */ |
900 | ||
26d5b9b4 | 901 | static SCM |
6e8d25a6 | 902 | scm_m_letrec1 (SCM op, SCM imm, SCM xorig, SCM env) |
0f2d19dd JB |
903 | { |
904 | SCM cdrx = SCM_CDR (xorig); /* locally mutable version of form */ | |
3db4adfc | 905 | char *what = SCM_SYMBOL_CHARS (SCM_CAR (xorig)); |
0f2d19dd JB |
906 | SCM x = cdrx, proc, arg1; /* structure traversers */ |
907 | SCM vars = SCM_EOL, inits = SCM_EOL, *initloc = &inits; | |
908 | ||
0f2d19dd | 909 | proc = SCM_CAR (x); |
160bb34a | 910 | SCM_ASSYNT (scm_ilength (proc) >= 1, scm_s_bindings, what); |
0f2d19dd JB |
911 | do |
912 | { | |
913 | /* vars scm_list reversed here, inits reversed at evaluation */ | |
914 | arg1 = SCM_CAR (proc); | |
160bb34a DH |
915 | SCM_ASSYNT (2 == scm_ilength (arg1), scm_s_bindings, what); |
916 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (arg1)), scm_s_variable, what); | |
185ab0ef | 917 | if (scm_c_improper_memq (SCM_CAR (arg1), vars)) |
db4b4ca6 | 918 | scm_misc_error (what, scm_s_duplicate_bindings, SCM_EOL); |
0f2d19dd JB |
919 | vars = scm_cons (SCM_CAR (arg1), vars); |
920 | *initloc = scm_cons (SCM_CAR (SCM_CDR (arg1)), SCM_EOL); | |
a23afe53 | 921 | initloc = SCM_CDRLOC (*initloc); |
0f2d19dd | 922 | } |
ff467021 | 923 | while (SCM_NIMP (proc = SCM_CDR (proc))); |
26d5b9b4 | 924 | |
3a3111a8 MD |
925 | return scm_cons2 (op, vars, |
926 | scm_cons (inits, scm_m_body (imm, SCM_CDR (x), what))); | |
0f2d19dd JB |
927 | } |
928 | ||
26d5b9b4 | 929 | SCM_SYNTAX(s_letrec, "letrec", scm_makmmacro, scm_m_letrec); |
2f0d1375 | 930 | SCM_GLOBAL_SYMBOL(scm_sym_letrec, s_letrec); |
26d5b9b4 MD |
931 | |
932 | SCM | |
6e8d25a6 | 933 | scm_m_letrec (SCM xorig, SCM env) |
26d5b9b4 MD |
934 | { |
935 | SCM x = SCM_CDR (xorig); | |
160bb34a | 936 | SCM_ASSYNT (scm_ilength (x) >= 2, scm_s_body, s_letrec); |
26d5b9b4 MD |
937 | |
938 | if (SCM_NULLP (SCM_CAR (x))) /* null binding, let* faster */ | |
3a3111a8 MD |
939 | return scm_m_letstar (scm_cons2 (SCM_CAR (xorig), SCM_EOL, |
940 | scm_m_body (SCM_IM_LETREC, | |
941 | SCM_CDR (x), | |
942 | s_letrec)), | |
26d5b9b4 MD |
943 | env); |
944 | else | |
945 | return scm_m_letrec1 (SCM_IM_LETREC, SCM_IM_LETREC, xorig, env); | |
946 | } | |
1cc91f1b | 947 | |
b8229a3b | 948 | SCM_SYNTAX(s_let, "let", scm_makmmacro, scm_m_let); |
2f0d1375 | 949 | SCM_GLOBAL_SYMBOL(scm_sym_let, s_let); |
b8229a3b | 950 | |
0f2d19dd | 951 | SCM |
6e8d25a6 | 952 | scm_m_let (SCM xorig, SCM env) |
0f2d19dd JB |
953 | { |
954 | SCM cdrx = SCM_CDR (xorig); /* locally mutable version of form */ | |
955 | SCM x = cdrx, proc, arg1, name; /* structure traversers */ | |
956 | SCM vars = SCM_EOL, inits = SCM_EOL, *varloc = &vars, *initloc = &inits; | |
957 | ||
160bb34a | 958 | SCM_ASSYNT (scm_ilength (x) >= 2, scm_s_body, s_let); |
0f2d19dd JB |
959 | proc = SCM_CAR (x); |
960 | if (SCM_NULLP (proc) | |
0c95b57d | 961 | || (SCM_CONSP (proc) |
26d5b9b4 MD |
962 | && SCM_CONSP (SCM_CAR (proc)) && SCM_NULLP (SCM_CDR (proc)))) |
963 | { | |
964 | /* null or single binding, let* is faster */ | |
3a3111a8 MD |
965 | return scm_m_letstar (scm_cons2 (SCM_CAR (xorig), proc, |
966 | scm_m_body (SCM_IM_LET, | |
967 | SCM_CDR (x), | |
968 | s_let)), | |
26d5b9b4 MD |
969 | env); |
970 | } | |
971 | ||
160bb34a | 972 | SCM_ASSYNT (SCM_NIMP (proc), scm_s_bindings, s_let); |
185ab0ef | 973 | if (SCM_CONSP (proc)) |
26d5b9b4 MD |
974 | { |
975 | /* plain let, proc is <bindings> */ | |
976 | return scm_m_letrec1 (SCM_IM_LET, SCM_IM_LET, xorig, env); | |
977 | } | |
978 | ||
0f2d19dd | 979 | if (!SCM_SYMBOLP (proc)) |
db4b4ca6 | 980 | scm_misc_error (s_let, scm_s_bindings, SCM_EOL); /* bad let */ |
0f2d19dd JB |
981 | name = proc; /* named let, build equiv letrec */ |
982 | x = SCM_CDR (x); | |
160bb34a | 983 | SCM_ASSYNT (scm_ilength (x) >= 2, scm_s_body, s_let); |
26d5b9b4 | 984 | proc = SCM_CAR (x); /* bindings list */ |
160bb34a | 985 | SCM_ASSYNT (scm_ilength (proc) >= 0, scm_s_bindings, s_let); |
ff467021 | 986 | while (SCM_NIMP (proc)) |
0f2d19dd JB |
987 | { /* vars and inits both in order */ |
988 | arg1 = SCM_CAR (proc); | |
160bb34a DH |
989 | SCM_ASSYNT (2 == scm_ilength (arg1), scm_s_bindings, s_let); |
990 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (arg1)), scm_s_variable, s_let); | |
0f2d19dd | 991 | *varloc = scm_cons (SCM_CAR (arg1), SCM_EOL); |
a23afe53 | 992 | varloc = SCM_CDRLOC (*varloc); |
0f2d19dd | 993 | *initloc = scm_cons (SCM_CAR (SCM_CDR (arg1)), SCM_EOL); |
a23afe53 | 994 | initloc = SCM_CDRLOC (*initloc); |
0f2d19dd JB |
995 | proc = SCM_CDR (proc); |
996 | } | |
26d5b9b4 | 997 | |
2f0d1375 | 998 | proc = scm_cons2 (scm_sym_lambda, vars, |
26d5b9b4 | 999 | scm_m_body (SCM_IM_LET, SCM_CDR (x), "let")); |
2f0d1375 | 1000 | proc = scm_cons2 (scm_sym_let, scm_cons (scm_cons2 (name, proc, SCM_EOL), |
26d5b9b4 MD |
1001 | SCM_EOL), |
1002 | scm_acons (name, inits, SCM_EOL)); | |
1003 | return scm_m_letrec1 (SCM_IM_LETREC, SCM_IM_LET, proc, env); | |
0f2d19dd JB |
1004 | } |
1005 | ||
1006 | ||
81123e6d MD |
1007 | SCM_SYNTAX (s_atapply,"@apply", scm_makmmacro, scm_m_apply); |
1008 | SCM_GLOBAL_SYMBOL (scm_sym_atapply, s_atapply); | |
1009 | SCM_GLOBAL_SYMBOL (scm_sym_apply, s_atapply + 1); | |
1cc91f1b | 1010 | |
0f2d19dd | 1011 | SCM |
6e8d25a6 | 1012 | scm_m_apply (SCM xorig, SCM env) |
0f2d19dd | 1013 | { |
160bb34a | 1014 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 2, scm_s_expression, s_atapply); |
0f2d19dd JB |
1015 | return scm_cons (SCM_IM_APPLY, SCM_CDR (xorig)); |
1016 | } | |
1017 | ||
b8229a3b MS |
1018 | |
1019 | SCM_SYNTAX(s_atcall_cc,"@call-with-current-continuation", scm_makmmacro, scm_m_cont); | |
2f0d1375 | 1020 | SCM_GLOBAL_SYMBOL(scm_sym_atcall_cc,s_atcall_cc); |
0f2d19dd | 1021 | |
1cc91f1b | 1022 | |
0f2d19dd | 1023 | SCM |
6e8d25a6 | 1024 | scm_m_cont (SCM xorig, SCM env) |
0f2d19dd | 1025 | { |
6cb702da | 1026 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, |
160bb34a | 1027 | scm_s_expression, s_atcall_cc); |
3a3111a8 | 1028 | return scm_cons (SCM_IM_CONT, SCM_CDR (xorig)); |
0f2d19dd JB |
1029 | } |
1030 | ||
73b64342 MD |
1031 | /* Multi-language support */ |
1032 | ||
43a912cf MD |
1033 | SCM scm_lisp_nil; |
1034 | SCM scm_lisp_t; | |
73b64342 MD |
1035 | |
1036 | SCM_SYNTAX (s_nil_cond, "nil-cond", scm_makmmacro, scm_m_nil_cond); | |
1037 | ||
1038 | SCM | |
1039 | scm_m_nil_cond (SCM xorig, SCM env) | |
1040 | { | |
1041 | int len = scm_ilength (SCM_CDR (xorig)); | |
160bb34a | 1042 | SCM_ASSYNT (len >= 1 && (len & 1) == 1, scm_s_expression, "nil-cond"); |
73b64342 MD |
1043 | return scm_cons (SCM_IM_NIL_COND, SCM_CDR (xorig)); |
1044 | } | |
1045 | ||
1046 | SCM_SYNTAX (s_nil_ify, "nil-ify", scm_makmmacro, scm_m_nil_ify); | |
1047 | ||
1048 | SCM | |
1049 | scm_m_nil_ify (SCM xorig, SCM env) | |
1050 | { | |
160bb34a | 1051 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, scm_s_expression, "nil-ify"); |
73b64342 MD |
1052 | return scm_cons (SCM_IM_NIL_IFY, SCM_CDR (xorig)); |
1053 | } | |
1054 | ||
1055 | SCM_SYNTAX (s_t_ify, "t-ify", scm_makmmacro, scm_m_t_ify); | |
1056 | ||
1057 | SCM | |
1058 | scm_m_t_ify (SCM xorig, SCM env) | |
1059 | { | |
160bb34a | 1060 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, scm_s_expression, "t-ify"); |
73b64342 MD |
1061 | return scm_cons (SCM_IM_T_IFY, SCM_CDR (xorig)); |
1062 | } | |
1063 | ||
1064 | SCM_SYNTAX (s_0_cond, "0-cond", scm_makmmacro, scm_m_0_cond); | |
1065 | ||
1066 | SCM | |
1067 | scm_m_0_cond (SCM xorig, SCM env) | |
1068 | { | |
1069 | int len = scm_ilength (SCM_CDR (xorig)); | |
160bb34a | 1070 | SCM_ASSYNT (len >= 1 && (len & 1) == 1, scm_s_expression, "0-cond"); |
73b64342 MD |
1071 | return scm_cons (SCM_IM_0_COND, SCM_CDR (xorig)); |
1072 | } | |
1073 | ||
1074 | SCM_SYNTAX (s_0_ify, "0-ify", scm_makmmacro, scm_m_0_ify); | |
1075 | ||
1076 | SCM | |
1077 | scm_m_0_ify (SCM xorig, SCM env) | |
1078 | { | |
160bb34a | 1079 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, scm_s_expression, "0-ify"); |
73b64342 MD |
1080 | return scm_cons (SCM_IM_0_IFY, SCM_CDR (xorig)); |
1081 | } | |
1082 | ||
1083 | SCM_SYNTAX (s_1_ify, "1-ify", scm_makmmacro, scm_m_1_ify); | |
1084 | ||
1085 | SCM | |
1086 | scm_m_1_ify (SCM xorig, SCM env) | |
1087 | { | |
160bb34a | 1088 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, scm_s_expression, "1-ify"); |
73b64342 MD |
1089 | return scm_cons (SCM_IM_1_IFY, SCM_CDR (xorig)); |
1090 | } | |
1091 | ||
1092 | SCM_SYNTAX (s_atfop, "@fop", scm_makmmacro, scm_m_atfop); | |
1093 | ||
1094 | SCM | |
1095 | scm_m_atfop (SCM xorig, SCM env) | |
1096 | { | |
1097 | SCM x = SCM_CDR (xorig), vcell; | |
160bb34a | 1098 | SCM_ASSYNT (scm_ilength (x) >= 1, scm_s_expression, "@fop"); |
73b64342 | 1099 | vcell = scm_symbol_fref (SCM_CAR (x)); |
160bb34a | 1100 | SCM_ASSYNT (SCM_CONSP (vcell), |
73b64342 | 1101 | "Symbol's function definition is void", NULL); |
3201d763 | 1102 | SCM_SET_CELL_WORD_0 (x, SCM_UNPACK (vcell) + scm_tc3_cons_gloc); |
73b64342 MD |
1103 | return x; |
1104 | } | |
1105 | ||
1106 | SCM_SYNTAX (s_atbind, "@bind", scm_makmmacro, scm_m_atbind); | |
1107 | ||
1108 | SCM | |
1109 | scm_m_atbind (SCM xorig, SCM env) | |
1110 | { | |
1111 | SCM x = SCM_CDR (xorig); | |
160bb34a | 1112 | SCM_ASSYNT (scm_ilength (x) > 1, scm_s_expression, "@bind"); |
73b64342 MD |
1113 | |
1114 | if (SCM_IMP (env)) | |
1115 | env = SCM_BOOL_F; | |
1116 | else | |
1117 | { | |
1118 | while (SCM_NIMP (SCM_CDR (env))) | |
1119 | env = SCM_CDR (env); | |
1120 | env = SCM_CAR (env); | |
1121 | if (SCM_CONSP (env)) | |
1122 | env = SCM_BOOL_F; | |
1123 | } | |
1124 | ||
1125 | x = SCM_CAR (x); | |
1126 | while (SCM_NIMP (x)) | |
1127 | { | |
3201d763 | 1128 | SCM_SET_CELL_WORD_0 (x, SCM_UNPACK (scm_sym2vcell (SCM_CAR (x), env, SCM_BOOL_T)) + scm_tc3_cons_gloc); |
73b64342 MD |
1129 | x = SCM_CDR (x); |
1130 | } | |
1131 | return scm_cons (SCM_IM_BIND, SCM_CDR (xorig)); | |
1132 | } | |
73b64342 | 1133 | |
a513ead3 MV |
1134 | SCM_SYNTAX (s_at_call_with_values, "@call-with-values", scm_makmmacro, scm_m_at_call_with_values); |
1135 | SCM_GLOBAL_SYMBOL(scm_sym_at_call_with_values, s_at_call_with_values); | |
1136 | ||
1137 | SCM | |
1138 | scm_m_at_call_with_values (SCM xorig, SCM env) | |
1139 | { | |
1140 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 2, | |
1141 | scm_s_expression, s_at_call_with_values); | |
1142 | return scm_cons (SCM_IM_CALL_WITH_VALUES, SCM_CDR (xorig)); | |
1143 | } | |
1144 | ||
26d5b9b4 MD |
1145 | SCM |
1146 | scm_m_expand_body (SCM xorig, SCM env) | |
1147 | { | |
22a52da1 | 1148 | SCM x = SCM_CDR (xorig), defs = SCM_EOL; |
26d5b9b4 MD |
1149 | char *what = SCM_ISYMCHARS (SCM_CAR (xorig)) + 2; |
1150 | ||
1151 | while (SCM_NIMP (x)) | |
1152 | { | |
22a52da1 DH |
1153 | SCM form = SCM_CAR (x); |
1154 | if (!SCM_CONSP (form)) | |
26d5b9b4 MD |
1155 | break; |
1156 | if (!SCM_SYMBOLP (SCM_CAR (form))) | |
1157 | break; | |
22a52da1 | 1158 | |
3a3111a8 MD |
1159 | form = scm_macroexp (scm_cons_source (form, |
1160 | SCM_CAR (form), | |
1161 | SCM_CDR (form)), | |
1162 | env); | |
26d5b9b4 | 1163 | |
cf498326 | 1164 | if (SCM_EQ_P (SCM_IM_DEFINE, SCM_CAR (form))) |
26d5b9b4 MD |
1165 | { |
1166 | defs = scm_cons (SCM_CDR (form), defs); | |
22a52da1 | 1167 | x = SCM_CDR (x); |
26d5b9b4 | 1168 | } |
22a52da1 | 1169 | else if (!SCM_IMP (defs)) |
26d5b9b4 MD |
1170 | { |
1171 | break; | |
1172 | } | |
cf498326 | 1173 | else if (SCM_EQ_P (SCM_IM_BEGIN, SCM_CAR (form))) |
26d5b9b4 MD |
1174 | { |
1175 | x = scm_append (scm_cons2 (SCM_CDR (form), SCM_CDR (x), SCM_EOL)); | |
1176 | } | |
1177 | else | |
1178 | { | |
22a52da1 | 1179 | x = scm_cons (form, SCM_CDR (x)); |
26d5b9b4 MD |
1180 | break; |
1181 | } | |
1182 | } | |
1183 | ||
160bb34a | 1184 | SCM_ASSYNT (SCM_NIMP (x), scm_s_body, what); |
26d5b9b4 MD |
1185 | if (SCM_NIMP (defs)) |
1186 | { | |
1187 | x = scm_cons (scm_m_letrec1 (SCM_IM_LETREC, | |
1188 | SCM_IM_DEFINE, | |
2f0d1375 | 1189 | scm_cons2 (scm_sym_define, defs, x), |
26d5b9b4 MD |
1190 | env), |
1191 | SCM_EOL); | |
1192 | } | |
1193 | ||
1194 | SCM_DEFER_INTS; | |
1195 | SCM_SETCAR (xorig, SCM_CAR (x)); | |
1196 | SCM_SETCDR (xorig, SCM_CDR (x)); | |
1197 | SCM_ALLOW_INTS; | |
1198 | ||
1199 | return xorig; | |
1200 | } | |
1201 | ||
1202 | SCM | |
1203 | scm_macroexp (SCM x, SCM env) | |
1204 | { | |
1205 | SCM res, proc; | |
1206 | ||
1207 | /* Don't bother to produce error messages here. We get them when we | |
1208 | eventually execute the code for real. */ | |
1209 | ||
1210 | macro_tail: | |
44d3cb0d | 1211 | if (!SCM_SYMBOLP (SCM_CAR (x))) |
26d5b9b4 MD |
1212 | return x; |
1213 | ||
1214 | #ifdef USE_THREADS | |
1215 | { | |
1216 | SCM *proc_ptr = scm_lookupcar1 (x, env, 0); | |
1217 | if (proc_ptr == NULL) | |
1218 | { | |
1219 | /* We have lost the race. */ | |
1220 | goto macro_tail; | |
1221 | } | |
1222 | proc = *proc_ptr; | |
1223 | } | |
1224 | #else | |
1225 | proc = *scm_lookupcar (x, env, 0); | |
1226 | #endif | |
1227 | ||
1228 | /* Only handle memoizing macros. `Acros' and `macros' are really | |
1229 | special forms and should not be evaluated here. */ | |
1230 | ||
22a52da1 | 1231 | if (!SCM_MACROP (proc) || SCM_MACRO_TYPE (proc) != 2) |
26d5b9b4 MD |
1232 | return x; |
1233 | ||
1234 | unmemocar (x, env); | |
22a52da1 | 1235 | res = scm_apply (SCM_MACRO_CODE (proc), x, scm_cons (env, scm_listofnull)); |
26d5b9b4 MD |
1236 | |
1237 | if (scm_ilength (res) <= 0) | |
1238 | res = scm_cons2 (SCM_IM_BEGIN, res, SCM_EOL); | |
1239 | ||
26d5b9b4 MD |
1240 | SCM_DEFER_INTS; |
1241 | SCM_SETCAR (x, SCM_CAR (res)); | |
1242 | SCM_SETCDR (x, SCM_CDR (res)); | |
1243 | SCM_ALLOW_INTS; | |
1244 | ||
1245 | goto macro_tail; | |
1246 | } | |
73b64342 | 1247 | |
6dbd0af5 MD |
1248 | /* scm_unmemocopy takes a memoized expression together with its |
1249 | * environment and rewrites it to its original form. Thus, it is the | |
1250 | * inversion of the rewrite rules above. The procedure is not | |
1251 | * optimized for speed. It's used in scm_iprin1 when printing the | |
220ff1eb MD |
1252 | * code of a closure, in scm_procedure_source, in display_frame when |
1253 | * generating the source for a stackframe in a backtrace, and in | |
1254 | * display_expression. | |
6dbd0af5 MD |
1255 | */ |
1256 | ||
26d5b9b4 MD |
1257 | /* We should introduce an anti-macro interface so that it is possible |
1258 | * to plug in transformers in both directions from other compilation | |
1259 | * units. unmemocopy could then dispatch to anti-macro transformers. | |
1260 | * (Those transformers could perhaps be written in slightly more | |
1261 | * readable style... :) | |
1262 | */ | |
1263 | ||
f1267706 | 1264 | #define SCM_BIT8(x) (127 & SCM_UNPACK (x)) |
c209c88e | 1265 | |
6dbd0af5 | 1266 | static SCM |
1bbd0b84 | 1267 | unmemocopy (SCM x, SCM env) |
6dbd0af5 MD |
1268 | { |
1269 | SCM ls, z; | |
1270 | #ifdef DEBUG_EXTENSIONS | |
1271 | SCM p; | |
1272 | #endif | |
1273 | if (SCM_NCELLP (x) || SCM_NECONSP (x)) | |
1274 | return x; | |
1275 | #ifdef DEBUG_EXTENSIONS | |
1276 | p = scm_whash_lookup (scm_source_whash, x); | |
1277 | #endif | |
1278 | switch (SCM_TYP7 (x)) | |
1279 | { | |
c209c88e | 1280 | case SCM_BIT8(SCM_IM_AND): |
2f0d1375 | 1281 | ls = z = scm_cons (scm_sym_and, SCM_UNSPECIFIED); |
6dbd0af5 | 1282 | break; |
c209c88e | 1283 | case SCM_BIT8(SCM_IM_BEGIN): |
2f0d1375 | 1284 | ls = z = scm_cons (scm_sym_begin, SCM_UNSPECIFIED); |
6dbd0af5 | 1285 | break; |
c209c88e | 1286 | case SCM_BIT8(SCM_IM_CASE): |
2f0d1375 | 1287 | ls = z = scm_cons (scm_sym_case, SCM_UNSPECIFIED); |
6dbd0af5 | 1288 | break; |
c209c88e | 1289 | case SCM_BIT8(SCM_IM_COND): |
2f0d1375 | 1290 | ls = z = scm_cons (scm_sym_cond, SCM_UNSPECIFIED); |
6dbd0af5 | 1291 | break; |
c209c88e | 1292 | case SCM_BIT8(SCM_IM_DO): |
2f0d1375 | 1293 | ls = scm_cons (scm_sym_do, SCM_UNSPECIFIED); |
6dbd0af5 | 1294 | goto transform; |
c209c88e | 1295 | case SCM_BIT8(SCM_IM_IF): |
2f0d1375 | 1296 | ls = z = scm_cons (scm_sym_if, SCM_UNSPECIFIED); |
6dbd0af5 | 1297 | break; |
c209c88e | 1298 | case SCM_BIT8(SCM_IM_LET): |
2f0d1375 | 1299 | ls = scm_cons (scm_sym_let, SCM_UNSPECIFIED); |
6dbd0af5 | 1300 | goto transform; |
c209c88e | 1301 | case SCM_BIT8(SCM_IM_LETREC): |
6dbd0af5 MD |
1302 | { |
1303 | SCM f, v, e, s; | |
2f0d1375 | 1304 | ls = scm_cons (scm_sym_letrec, SCM_UNSPECIFIED); |
6dbd0af5 MD |
1305 | transform: |
1306 | x = SCM_CDR (x); | |
26d5b9b4 | 1307 | /* binding names */ |
6dbd0af5 MD |
1308 | f = v = SCM_CAR (x); |
1309 | x = SCM_CDR (x); | |
e2806c10 | 1310 | z = EXTEND_ENV (f, SCM_EOL, env); |
26d5b9b4 | 1311 | /* inits */ |
6dbd0af5 | 1312 | e = scm_reverse (unmemocopy (SCM_CAR (x), |
cf498326 | 1313 | SCM_EQ_P (SCM_CAR (ls), scm_sym_letrec) ? z : env)); |
6dbd0af5 | 1314 | env = z; |
26d5b9b4 | 1315 | /* increments */ |
cf498326 | 1316 | s = SCM_EQ_P (SCM_CAR (ls), scm_sym_do) |
6dbd0af5 MD |
1317 | ? scm_reverse (unmemocopy (SCM_CDR (SCM_CDR (SCM_CDR (x))), env)) |
1318 | : f; | |
26d5b9b4 | 1319 | /* build transformed binding list */ |
6dbd0af5 | 1320 | z = SCM_EOL; |
1bd07992 | 1321 | while (SCM_NIMP (v)) |
6dbd0af5 MD |
1322 | { |
1323 | z = scm_acons (SCM_CAR (v), | |
1324 | scm_cons (SCM_CAR (e), | |
cf498326 | 1325 | SCM_EQ_P (SCM_CAR (s), SCM_CAR (v)) |
6dbd0af5 MD |
1326 | ? SCM_EOL |
1327 | : scm_cons (SCM_CAR (s), SCM_EOL)), | |
1328 | z); | |
1329 | v = SCM_CDR (v); | |
1330 | e = SCM_CDR (e); | |
1331 | s = SCM_CDR (s); | |
1332 | } | |
a23afe53 MD |
1333 | z = scm_cons (z, SCM_UNSPECIFIED); |
1334 | SCM_SETCDR (ls, z); | |
cf498326 | 1335 | if (SCM_EQ_P (SCM_CAR (ls), scm_sym_do)) |
6dbd0af5 MD |
1336 | { |
1337 | x = SCM_CDR (x); | |
26d5b9b4 | 1338 | /* test clause */ |
a23afe53 | 1339 | SCM_SETCDR (z, scm_cons (unmemocopy (SCM_CAR (x), env), |
6dbd0af5 | 1340 | SCM_UNSPECIFIED)); |
a23afe53 MD |
1341 | z = SCM_CDR (z); |
1342 | x = (SCM) (SCM_CARLOC (SCM_CDR (x)) - 1); | |
26d5b9b4 MD |
1343 | /* body forms are now to be found in SCM_CDR (x) |
1344 | (this is how *real* code look like! :) */ | |
6dbd0af5 MD |
1345 | } |
1346 | break; | |
1347 | } | |
c209c88e | 1348 | case SCM_BIT8(SCM_IM_LETSTAR): |
6dbd0af5 MD |
1349 | { |
1350 | SCM b, y; | |
1351 | x = SCM_CDR (x); | |
1352 | b = SCM_CAR (x); | |
1353 | y = SCM_EOL; | |
1354 | if SCM_IMP (b) | |
1355 | { | |
e2806c10 | 1356 | env = EXTEND_ENV (SCM_EOL, SCM_EOL, env); |
6dbd0af5 MD |
1357 | goto letstar; |
1358 | } | |
1359 | y = z = scm_acons (SCM_CAR (b), | |
1360 | unmemocar ( | |
1361 | scm_cons (unmemocopy (SCM_CAR (SCM_CDR (b)), env), SCM_EOL), env), | |
1362 | SCM_UNSPECIFIED); | |
e2806c10 | 1363 | env = EXTEND_ENV (SCM_CAR (b), SCM_BOOL_F, env); |
6dbd0af5 MD |
1364 | b = SCM_CDR (SCM_CDR (b)); |
1365 | if (SCM_IMP (b)) | |
1366 | { | |
1367 | SCM_SETCDR (y, SCM_EOL); | |
2f0d1375 | 1368 | ls = scm_cons (scm_sym_let, z = scm_cons (y, SCM_UNSPECIFIED)); |
6dbd0af5 MD |
1369 | break; |
1370 | } | |
1371 | do | |
1372 | { | |
a23afe53 MD |
1373 | SCM_SETCDR (z, scm_acons (SCM_CAR (b), |
1374 | unmemocar ( | |
6dbd0af5 | 1375 | scm_cons (unmemocopy (SCM_CAR (SCM_CDR (b)), env), SCM_EOL), env), |
a23afe53 MD |
1376 | SCM_UNSPECIFIED)); |
1377 | z = SCM_CDR (z); | |
e2806c10 | 1378 | env = EXTEND_ENV (SCM_CAR (b), SCM_BOOL_F, env); |
6dbd0af5 MD |
1379 | b = SCM_CDR (SCM_CDR (b)); |
1380 | } | |
ff467021 | 1381 | while (SCM_NIMP (b)); |
a23afe53 | 1382 | SCM_SETCDR (z, SCM_EOL); |
6dbd0af5 | 1383 | letstar: |
2f0d1375 | 1384 | ls = scm_cons (scm_sym_letstar, z = scm_cons (y, SCM_UNSPECIFIED)); |
6dbd0af5 MD |
1385 | break; |
1386 | } | |
c209c88e | 1387 | case SCM_BIT8(SCM_IM_OR): |
2f0d1375 | 1388 | ls = z = scm_cons (scm_sym_or, SCM_UNSPECIFIED); |
6dbd0af5 | 1389 | break; |
c209c88e | 1390 | case SCM_BIT8(SCM_IM_LAMBDA): |
6dbd0af5 | 1391 | x = SCM_CDR (x); |
2f0d1375 | 1392 | ls = scm_cons (scm_sym_lambda, |
6dbd0af5 | 1393 | z = scm_cons (SCM_CAR (x), SCM_UNSPECIFIED)); |
e2806c10 | 1394 | env = EXTEND_ENV (SCM_CAR (x), SCM_EOL, env); |
6dbd0af5 | 1395 | break; |
c209c88e | 1396 | case SCM_BIT8(SCM_IM_QUOTE): |
2f0d1375 | 1397 | ls = z = scm_cons (scm_sym_quote, SCM_UNSPECIFIED); |
6dbd0af5 | 1398 | break; |
c209c88e | 1399 | case SCM_BIT8(SCM_IM_SET_X): |
89efbff4 | 1400 | ls = z = scm_cons (scm_sym_set_x, SCM_UNSPECIFIED); |
6dbd0af5 | 1401 | break; |
c209c88e | 1402 | case SCM_BIT8(SCM_IM_DEFINE): |
6dbd0af5 MD |
1403 | { |
1404 | SCM n; | |
1405 | x = SCM_CDR (x); | |
2f0d1375 | 1406 | ls = scm_cons (scm_sym_define, |
6dbd0af5 MD |
1407 | z = scm_cons (n = SCM_CAR (x), SCM_UNSPECIFIED)); |
1408 | if (SCM_NNULLP (env)) | |
a23afe53 | 1409 | SCM_SETCAR (SCM_CAR (env), scm_cons (n, SCM_CAR (SCM_CAR (env)))); |
6dbd0af5 MD |
1410 | break; |
1411 | } | |
c209c88e | 1412 | case SCM_BIT8(SCM_MAKISYM (0)): |
6dbd0af5 MD |
1413 | z = SCM_CAR (x); |
1414 | if (!SCM_ISYMP (z)) | |
1415 | goto unmemo; | |
ff467021 | 1416 | switch (SCM_ISYMNUM (z)) |
6dbd0af5 MD |
1417 | { |
1418 | case (SCM_ISYMNUM (SCM_IM_APPLY)): | |
2f0d1375 | 1419 | ls = z = scm_cons (scm_sym_atapply, SCM_UNSPECIFIED); |
6dbd0af5 MD |
1420 | goto loop; |
1421 | case (SCM_ISYMNUM (SCM_IM_CONT)): | |
2f0d1375 | 1422 | ls = z = scm_cons (scm_sym_atcall_cc, SCM_UNSPECIFIED); |
6dbd0af5 | 1423 | goto loop; |
a570e93a MD |
1424 | case (SCM_ISYMNUM (SCM_IM_DELAY)): |
1425 | ls = z = scm_cons (scm_sym_delay, SCM_UNSPECIFIED); | |
1426 | x = SCM_CDR (x); | |
1427 | goto loop; | |
a513ead3 MV |
1428 | case (SCM_ISYMNUM (SCM_IM_CALL_WITH_VALUES)): |
1429 | ls = z = scm_cons (scm_sym_at_call_with_values, SCM_UNSPECIFIED); | |
1430 | goto loop; | |
6dbd0af5 | 1431 | default: |
fa888178 | 1432 | /* appease the Sun compiler god: */ ; |
6dbd0af5 MD |
1433 | } |
1434 | unmemo: | |
1435 | default: | |
1436 | ls = z = unmemocar (scm_cons (unmemocopy (SCM_CAR (x), env), | |
1437 | SCM_UNSPECIFIED), | |
1438 | env); | |
1439 | } | |
1440 | loop: | |
1441 | while (SCM_CELLP (x = SCM_CDR (x)) && SCM_ECONSP (x)) | |
a23afe53 | 1442 | { |
44d3cb0d | 1443 | if (SCM_ISYMP (SCM_CAR (x))) |
26d5b9b4 MD |
1444 | /* skip body markers */ |
1445 | continue; | |
a23afe53 MD |
1446 | SCM_SETCDR (z, unmemocar (scm_cons (unmemocopy (SCM_CAR (x), env), |
1447 | SCM_UNSPECIFIED), | |
1448 | env)); | |
1449 | z = SCM_CDR (z); | |
1450 | } | |
1451 | SCM_SETCDR (z, x); | |
6dbd0af5 MD |
1452 | #ifdef DEBUG_EXTENSIONS |
1453 | if (SCM_NFALSEP (p)) | |
1454 | scm_whash_insert (scm_source_whash, ls, p); | |
1455 | #endif | |
1456 | return ls; | |
1457 | } | |
1458 | ||
1cc91f1b | 1459 | |
6dbd0af5 | 1460 | SCM |
6e8d25a6 | 1461 | scm_unmemocopy (SCM x, SCM env) |
6dbd0af5 MD |
1462 | { |
1463 | if (SCM_NNULLP (env)) | |
1464 | /* Make a copy of the lowest frame to protect it from | |
1465 | modifications by SCM_IM_DEFINE */ | |
1466 | return unmemocopy (x, scm_cons (SCM_CAR (env), SCM_CDR (env))); | |
1467 | else | |
1468 | return unmemocopy (x, env); | |
1469 | } | |
1470 | ||
cf7c17e9 | 1471 | #ifndef SCM_RECKLESS |
1cc91f1b | 1472 | |
0f2d19dd | 1473 | int |
6e8d25a6 | 1474 | scm_badargsp (SCM formals, SCM args) |
0f2d19dd | 1475 | { |
ff467021 | 1476 | while (SCM_NIMP (formals)) |
0f2d19dd | 1477 | { |
ff467021 JB |
1478 | if (SCM_NCONSP (formals)) |
1479 | return 0; | |
1480 | if (SCM_IMP(args)) | |
1481 | return 1; | |
0f2d19dd JB |
1482 | formals = SCM_CDR (formals); |
1483 | args = SCM_CDR (args); | |
1484 | } | |
1485 | return SCM_NNULLP (args) ? 1 : 0; | |
1486 | } | |
1487 | #endif | |
1488 | ||
002f1a5d MD |
1489 | static int |
1490 | scm_badformalsp (SCM closure, int n) | |
1491 | { | |
726d810a DH |
1492 | SCM formals = SCM_CLOSURE_FORMALS (closure); |
1493 | while (!SCM_NULLP (formals)) | |
002f1a5d | 1494 | { |
726d810a | 1495 | if (!SCM_CONSP (formals)) |
002f1a5d MD |
1496 | return 0; |
1497 | if (n == 0) | |
1498 | return 1; | |
1499 | --n; | |
1500 | formals = SCM_CDR (formals); | |
1501 | } | |
1502 | return n; | |
1503 | } | |
0f2d19dd JB |
1504 | |
1505 | \f | |
6dbd0af5 | 1506 | SCM |
6e8d25a6 | 1507 | scm_eval_args (SCM l, SCM env, SCM proc) |
6dbd0af5 | 1508 | { |
680ed4a8 | 1509 | SCM results = SCM_EOL, *lloc = &results, res; |
22a52da1 | 1510 | while (!SCM_IMP (l)) |
6dbd0af5 | 1511 | { |
cf7c17e9 | 1512 | #ifdef SCM_CAUTIOUS |
44d3cb0d | 1513 | if (SCM_CONSP (l)) |
680ed4a8 MD |
1514 | { |
1515 | if (SCM_IMP (SCM_CAR (l))) | |
6cb702da | 1516 | res = SCM_EVALIM (SCM_CAR (l), env); |
680ed4a8 MD |
1517 | else |
1518 | res = EVALCELLCAR (l, env); | |
1519 | } | |
3201d763 | 1520 | else if (SCM_TYP3 (l) == scm_tc3_cons_gloc) |
680ed4a8 | 1521 | { |
3201d763 DH |
1522 | scm_bits_t vcell = SCM_STRUCT_VTABLE_DATA (l) [scm_vtable_index_vcell]; |
1523 | if (vcell == 0) | |
680ed4a8 | 1524 | res = SCM_CAR (l); /* struct planted in code */ |
3201d763 DH |
1525 | else |
1526 | res = SCM_PACK (vcell); | |
680ed4a8 MD |
1527 | } |
1528 | else | |
1529 | goto wrongnumargs; | |
1530 | #else | |
1531 | res = EVALCAR (l, env); | |
1532 | #endif | |
1533 | *lloc = scm_cons (res, SCM_EOL); | |
a23afe53 | 1534 | lloc = SCM_CDRLOC (*lloc); |
6dbd0af5 MD |
1535 | l = SCM_CDR (l); |
1536 | } | |
cf7c17e9 | 1537 | #ifdef SCM_CAUTIOUS |
22a52da1 | 1538 | if (!SCM_NULLP (l)) |
680ed4a8 MD |
1539 | { |
1540 | wrongnumargs: | |
1541 | scm_wrong_num_args (proc); | |
1542 | } | |
1543 | #endif | |
1544 | return results; | |
6dbd0af5 | 1545 | } |
c4ac4d88 | 1546 | |
9de33deb MD |
1547 | SCM |
1548 | scm_eval_body (SCM code, SCM env) | |
1549 | { | |
1550 | SCM next; | |
1551 | again: | |
1552 | next = code; | |
1553 | while (SCM_NNULLP (next = SCM_CDR (next))) | |
1554 | { | |
1555 | if (SCM_IMP (SCM_CAR (code))) | |
1556 | { | |
1557 | if (SCM_ISYMP (SCM_CAR (code))) | |
1558 | { | |
1559 | code = scm_m_expand_body (code, env); | |
1560 | goto again; | |
1561 | } | |
1562 | } | |
1563 | else | |
1564 | SCM_XEVAL (SCM_CAR (code), env); | |
1565 | code = next; | |
1566 | } | |
1567 | return SCM_XEVALCAR (code, env); | |
1568 | } | |
1569 | ||
c4ac4d88 | 1570 | |
0f2d19dd JB |
1571 | #endif /* !DEVAL */ |
1572 | ||
6dbd0af5 MD |
1573 | |
1574 | /* SECTION: This code is specific for the debugging support. One | |
1575 | * branch is read when DEVAL isn't defined, the other when DEVAL is | |
1576 | * defined. | |
1577 | */ | |
1578 | ||
1579 | #ifndef DEVAL | |
1580 | ||
1581 | #define SCM_APPLY scm_apply | |
1582 | #define PREP_APPLY(proc, args) | |
1583 | #define ENTER_APPLY | |
1584 | #define RETURN(x) return x; | |
b7ff98dd MD |
1585 | #ifdef STACK_CHECKING |
1586 | #ifndef NO_CEVAL_STACK_CHECKING | |
1587 | #define EVAL_STACK_CHECKING | |
1588 | #endif | |
6dbd0af5 MD |
1589 | #endif |
1590 | ||
1591 | #else /* !DEVAL */ | |
1592 | ||
0f2d19dd JB |
1593 | #undef SCM_CEVAL |
1594 | #define SCM_CEVAL scm_deval /* Substitute all uses of scm_ceval */ | |
1595 | #undef SCM_APPLY | |
1596 | #define SCM_APPLY scm_dapply | |
6dbd0af5 MD |
1597 | #undef PREP_APPLY |
1598 | #define PREP_APPLY(p, l) \ | |
1599 | { ++debug.info; debug.info->a.proc = p; debug.info->a.args = l; } | |
1600 | #undef ENTER_APPLY | |
1601 | #define ENTER_APPLY \ | |
d3a6bc94 | 1602 | do { \ |
b7ff98dd | 1603 | SCM_SET_ARGSREADY (debug);\ |
b6d75948 | 1604 | if (CHECK_APPLY && SCM_TRAPS_P)\ |
b7ff98dd | 1605 | if (SCM_APPLY_FRAME_P || (SCM_TRACE_P && PROCTRACEP (proc)))\ |
6dbd0af5 | 1606 | {\ |
156dcb09 | 1607 | SCM tmp, tail = SCM_BOOL(SCM_TRACED_FRAME_P (debug)); \ |
c6a4fbce | 1608 | SCM_SET_TRACED_FRAME (debug); \ |
b7ff98dd | 1609 | if (SCM_CHEAPTRAPS_P)\ |
6dbd0af5 | 1610 | {\ |
c0ab1b8d | 1611 | tmp = scm_make_debugobj (&debug);\ |
2f0d1375 | 1612 | scm_ithrow (scm_sym_apply_frame, scm_cons2 (tmp, tail, SCM_EOL), 0);\ |
b6d75948 | 1613 | }\ |
6dbd0af5 MD |
1614 | else\ |
1615 | {\ | |
5f144b10 GH |
1616 | int first;\ |
1617 | tmp = scm_make_continuation (&first);\ | |
1618 | if (first)\ | |
2f0d1375 | 1619 | scm_ithrow (scm_sym_apply_frame, scm_cons2 (tmp, tail, SCM_EOL), 0);\ |
6dbd0af5 MD |
1620 | }\ |
1621 | }\ | |
d3a6bc94 | 1622 | } while (0) |
0f2d19dd JB |
1623 | #undef RETURN |
1624 | #define RETURN(e) {proc = (e); goto exit;} | |
b7ff98dd MD |
1625 | #ifdef STACK_CHECKING |
1626 | #ifndef EVAL_STACK_CHECKING | |
1627 | #define EVAL_STACK_CHECKING | |
1628 | #endif | |
6dbd0af5 MD |
1629 | #endif |
1630 | ||
1631 | /* scm_ceval_ptr points to the currently selected evaluator. | |
1632 | * *fixme*: Although efficiency is important here, this state variable | |
1633 | * should probably not be a global. It should be related to the | |
1634 | * current repl. | |
1635 | */ | |
1636 | ||
1cc91f1b | 1637 | |
1bbd0b84 | 1638 | SCM (*scm_ceval_ptr) (SCM x, SCM env); |
0f2d19dd | 1639 | |
1646d37b | 1640 | /* scm_last_debug_frame contains a pointer to the last debugging |
6dbd0af5 MD |
1641 | * information stack frame. It is accessed very often from the |
1642 | * debugging evaluator, so it should probably not be indirectly | |
1643 | * addressed. Better to save and restore it from the current root at | |
1644 | * any stack swaps. | |
1645 | */ | |
1646 | ||
1646d37b MD |
1647 | #ifndef USE_THREADS |
1648 | scm_debug_frame *scm_last_debug_frame; | |
1649 | #endif | |
6dbd0af5 MD |
1650 | |
1651 | /* scm_debug_eframe_size is the number of slots available for pseudo | |
1652 | * stack frames at each real stack frame. | |
1653 | */ | |
1654 | ||
1655 | int scm_debug_eframe_size; | |
1656 | ||
b7ff98dd | 1657 | int scm_debug_mode, scm_check_entry_p, scm_check_apply_p, scm_check_exit_p; |
6dbd0af5 | 1658 | |
a74145b8 MD |
1659 | int scm_eval_stack; |
1660 | ||
33b97402 | 1661 | scm_option scm_eval_opts[] = { |
a74145b8 | 1662 | { SCM_OPTION_INTEGER, "stack", 22000, "Size of thread stacks (in machine words)." } |
33b97402 MD |
1663 | }; |
1664 | ||
6dbd0af5 | 1665 | scm_option scm_debug_opts[] = { |
b7ff98dd MD |
1666 | { SCM_OPTION_BOOLEAN, "cheap", 1, |
1667 | "*Flyweight representation of the stack at traps." }, | |
1668 | { SCM_OPTION_BOOLEAN, "breakpoints", 0, "*Check for breakpoints." }, | |
1669 | { SCM_OPTION_BOOLEAN, "trace", 0, "*Trace mode." }, | |
1670 | { SCM_OPTION_BOOLEAN, "procnames", 1, | |
1671 | "Record procedure names at definition." }, | |
1672 | { SCM_OPTION_BOOLEAN, "backwards", 0, | |
1673 | "Display backtrace in anti-chronological order." }, | |
274dc5fd | 1674 | { SCM_OPTION_INTEGER, "width", 79, "Maximal width of backtrace." }, |
4e646a03 MD |
1675 | { SCM_OPTION_INTEGER, "indent", 10, "Maximal indentation in backtrace." }, |
1676 | { SCM_OPTION_INTEGER, "frames", 3, | |
b7ff98dd | 1677 | "Maximum number of tail-recursive frames in backtrace." }, |
4e646a03 MD |
1678 | { SCM_OPTION_INTEGER, "maxdepth", 1000, |
1679 | "Maximal number of stored backtrace frames." }, | |
1680 | { SCM_OPTION_INTEGER, "depth", 20, "Maximal length of printed backtrace." }, | |
11f77bfc MD |
1681 | { SCM_OPTION_BOOLEAN, "backtrace", 0, "Show backtrace on error." }, |
1682 | { SCM_OPTION_BOOLEAN, "debug", 0, "Use the debugging evaluator." }, | |
a74145b8 | 1683 | { SCM_OPTION_INTEGER, "stack", 20000, "Stack size limit (measured in words; 0 = no check)." } |
6dbd0af5 MD |
1684 | }; |
1685 | ||
1686 | scm_option scm_evaluator_trap_table[] = { | |
b6d75948 | 1687 | { SCM_OPTION_BOOLEAN, "traps", 0, "Enable evaluator traps." }, |
b7ff98dd MD |
1688 | { SCM_OPTION_BOOLEAN, "enter-frame", 0, "Trap when eval enters new frame." }, |
1689 | { SCM_OPTION_BOOLEAN, "apply-frame", 0, "Trap when entering apply." }, | |
1690 | { SCM_OPTION_BOOLEAN, "exit-frame", 0, "Trap when exiting eval or apply." } | |
6dbd0af5 MD |
1691 | }; |
1692 | ||
a1ec6916 | 1693 | SCM_DEFINE (scm_eval_options_interface, "eval-options-interface", 0, 1, 0, |
1bbd0b84 | 1694 | (SCM setting), |
b3f26b14 MG |
1695 | "Option interface for the evaluation options. Instead of using\n" |
1696 | "this procedure directly, use the procedures @code{eval-enable},\n" | |
1697 | "@code{eval-disable}, @code{eval-set!} and @var{eval-options}.") | |
1bbd0b84 | 1698 | #define FUNC_NAME s_scm_eval_options_interface |
33b97402 MD |
1699 | { |
1700 | SCM ans; | |
1701 | SCM_DEFER_INTS; | |
1702 | ans = scm_options (setting, | |
1703 | scm_eval_opts, | |
1704 | SCM_N_EVAL_OPTIONS, | |
1bbd0b84 | 1705 | FUNC_NAME); |
a74145b8 | 1706 | scm_eval_stack = SCM_EVAL_STACK * sizeof (void *); |
33b97402 MD |
1707 | SCM_ALLOW_INTS; |
1708 | return ans; | |
1709 | } | |
1bbd0b84 | 1710 | #undef FUNC_NAME |
33b97402 | 1711 | |
a1ec6916 | 1712 | SCM_DEFINE (scm_evaluator_traps, "evaluator-traps-interface", 0, 1, 0, |
1bbd0b84 | 1713 | (SCM setting), |
b3f26b14 | 1714 | "Option interface for the evaluator trap options.") |
1bbd0b84 | 1715 | #define FUNC_NAME s_scm_evaluator_traps |
33b97402 MD |
1716 | { |
1717 | SCM ans; | |
1718 | SCM_DEFER_INTS; | |
1719 | ans = scm_options (setting, | |
1720 | scm_evaluator_trap_table, | |
1721 | SCM_N_EVALUATOR_TRAPS, | |
1bbd0b84 | 1722 | FUNC_NAME); |
33b97402 | 1723 | SCM_RESET_DEBUG_MODE; |
bfc69694 | 1724 | SCM_ALLOW_INTS; |
33b97402 MD |
1725 | return ans; |
1726 | } | |
1bbd0b84 | 1727 | #undef FUNC_NAME |
33b97402 | 1728 | |
6dbd0af5 | 1729 | SCM |
6e8d25a6 | 1730 | scm_deval_args (SCM l, SCM env, SCM proc, SCM *lloc) |
0f2d19dd | 1731 | { |
680ed4a8 | 1732 | SCM *results = lloc, res; |
22a52da1 | 1733 | while (!SCM_IMP (l)) |
0f2d19dd | 1734 | { |
cf7c17e9 | 1735 | #ifdef SCM_CAUTIOUS |
44d3cb0d | 1736 | if (SCM_CONSP (l)) |
680ed4a8 MD |
1737 | { |
1738 | if (SCM_IMP (SCM_CAR (l))) | |
6cb702da | 1739 | res = SCM_EVALIM (SCM_CAR (l), env); |
680ed4a8 MD |
1740 | else |
1741 | res = EVALCELLCAR (l, env); | |
1742 | } | |
3201d763 | 1743 | else if (SCM_TYP3 (l) == scm_tc3_cons_gloc) |
680ed4a8 | 1744 | { |
3201d763 DH |
1745 | scm_bits_t vcell = SCM_STRUCT_VTABLE_DATA (l) [scm_vtable_index_vcell]; |
1746 | if (vcell == 0) | |
680ed4a8 | 1747 | res = SCM_CAR (l); /* struct planted in code */ |
3201d763 DH |
1748 | else |
1749 | res = SCM_PACK (vcell); | |
680ed4a8 MD |
1750 | } |
1751 | else | |
1752 | goto wrongnumargs; | |
1753 | #else | |
1754 | res = EVALCAR (l, env); | |
1755 | #endif | |
1756 | *lloc = scm_cons (res, SCM_EOL); | |
a23afe53 | 1757 | lloc = SCM_CDRLOC (*lloc); |
0f2d19dd JB |
1758 | l = SCM_CDR (l); |
1759 | } | |
cf7c17e9 | 1760 | #ifdef SCM_CAUTIOUS |
22a52da1 | 1761 | if (!SCM_NULLP (l)) |
680ed4a8 MD |
1762 | { |
1763 | wrongnumargs: | |
1764 | scm_wrong_num_args (proc); | |
1765 | } | |
1766 | #endif | |
1767 | return *results; | |
0f2d19dd JB |
1768 | } |
1769 | ||
6dbd0af5 MD |
1770 | #endif /* !DEVAL */ |
1771 | ||
1772 | ||
1773 | /* SECTION: Some local definitions for the evaluator. | |
1774 | */ | |
1775 | ||
d9d39d76 MV |
1776 | /* Update the toplevel environment frame ENV so that it refers to the |
1777 | current module. | |
1778 | */ | |
1779 | #define UPDATE_TOPLEVEL_ENV(env) \ | |
1780 | do { \ | |
1781 | SCM p = scm_current_module_lookup_closure (); \ | |
1782 | if (p != SCM_CAR(env)) \ | |
1783 | env = scm_top_level_env (p); \ | |
1784 | } while (0) | |
1785 | ||
6dbd0af5 | 1786 | #ifndef DEVAL |
3201d763 | 1787 | #define CHECK_EQVISH(A,B) (SCM_EQ_P ((A), (B)) || (SCM_NFALSEP (scm_eqv_p ((A), (B))))) |
6dbd0af5 MD |
1788 | #endif /* DEVAL */ |
1789 | ||
399dedcc | 1790 | #define BUILTIN_RPASUBR /* Handle rpsubrs and asubrs without calling apply */ |
6dbd0af5 MD |
1791 | |
1792 | /* SECTION: This is the evaluator. Like any real monster, it has | |
1793 | * three heads. This code is compiled twice. | |
1794 | */ | |
1795 | ||
0f2d19dd | 1796 | #if 0 |
1cc91f1b | 1797 | |
0f2d19dd | 1798 | SCM |
1bbd0b84 | 1799 | scm_ceval (SCM x, SCM env) |
0f2d19dd JB |
1800 | {} |
1801 | #endif | |
1802 | #if 0 | |
1cc91f1b | 1803 | |
0f2d19dd | 1804 | SCM |
1bbd0b84 | 1805 | scm_deval (SCM x, SCM env) |
0f2d19dd JB |
1806 | {} |
1807 | #endif | |
1808 | ||
6dbd0af5 | 1809 | SCM |
1bbd0b84 | 1810 | SCM_CEVAL (SCM x, SCM env) |
0f2d19dd JB |
1811 | { |
1812 | union | |
1813 | { | |
1814 | SCM *lloc; | |
1815 | SCM arg1; | |
f8769b1d | 1816 | } t; |
6dbd0af5 MD |
1817 | SCM proc, arg2; |
1818 | #ifdef DEVAL | |
c0ab1b8d JB |
1819 | scm_debug_frame debug; |
1820 | scm_debug_info *debug_info_end; | |
1646d37b | 1821 | debug.prev = scm_last_debug_frame; |
6dbd0af5 | 1822 | debug.status = scm_debug_eframe_size; |
04b6c081 MD |
1823 | /* |
1824 | * The debug.vect contains twice as much scm_debug_info frames as the | |
1825 | * user has specified with (debug-set! frames <n>). | |
1826 | * | |
1827 | * Even frames are eval frames, odd frames are apply frames. | |
1828 | */ | |
c0ab1b8d JB |
1829 | debug.vect = (scm_debug_info *) alloca (scm_debug_eframe_size |
1830 | * sizeof (debug.vect[0])); | |
1831 | debug.info = debug.vect; | |
1832 | debug_info_end = debug.vect + scm_debug_eframe_size; | |
1833 | scm_last_debug_frame = &debug; | |
6dbd0af5 | 1834 | #endif |
b7ff98dd | 1835 | #ifdef EVAL_STACK_CHECKING |
6f13f9cb MD |
1836 | if (scm_stack_checking_enabled_p |
1837 | && SCM_STACK_OVERFLOW_P ((SCM_STACKITEM *) &proc)) | |
6dbd0af5 | 1838 | { |
b7ff98dd | 1839 | #ifdef DEVAL |
6dbd0af5 MD |
1840 | debug.info->e.exp = x; |
1841 | debug.info->e.env = env; | |
b7ff98dd | 1842 | #endif |
6dbd0af5 MD |
1843 | scm_report_stack_overflow (); |
1844 | } | |
1845 | #endif | |
1846 | #ifdef DEVAL | |
1847 | goto start; | |
1848 | #endif | |
1849 | loopnoap: | |
1850 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
1851 | loop: | |
1852 | #ifdef DEVAL | |
b7ff98dd MD |
1853 | SCM_CLEAR_ARGSREADY (debug); |
1854 | if (SCM_OVERFLOWP (debug)) | |
6dbd0af5 | 1855 | --debug.info; |
04b6c081 MD |
1856 | /* |
1857 | * In theory, this should be the only place where it is necessary to | |
1858 | * check for space in debug.vect since both eval frames and | |
1859 | * available space are even. | |
1860 | * | |
1861 | * For this to be the case, however, it is necessary that primitive | |
1862 | * special forms which jump back to `loop', `begin' or some similar | |
1863 | * label call PREP_APPLY. A convenient way to do this is to jump to | |
1864 | * `loopnoap' or `cdrxnoap'. | |
1865 | */ | |
c0ab1b8d | 1866 | else if (++debug.info >= debug_info_end) |
6dbd0af5 | 1867 | { |
b7ff98dd | 1868 | SCM_SET_OVERFLOW (debug); |
6dbd0af5 MD |
1869 | debug.info -= 2; |
1870 | } | |
1871 | start: | |
1872 | debug.info->e.exp = x; | |
1873 | debug.info->e.env = env; | |
b6d75948 | 1874 | if (CHECK_ENTRY && SCM_TRAPS_P) |
b7ff98dd | 1875 | if (SCM_ENTER_FRAME_P || (SCM_BREAKPOINTS_P && SRCBRKP (x))) |
6dbd0af5 | 1876 | { |
156dcb09 | 1877 | SCM tail = SCM_BOOL(SCM_TAILRECP (debug)); |
b7ff98dd | 1878 | SCM_SET_TAILREC (debug); |
b7ff98dd | 1879 | if (SCM_CHEAPTRAPS_P) |
c0ab1b8d | 1880 | t.arg1 = scm_make_debugobj (&debug); |
6dbd0af5 MD |
1881 | else |
1882 | { | |
5f144b10 GH |
1883 | int first; |
1884 | SCM val = scm_make_continuation (&first); | |
1885 | ||
1886 | if (first) | |
1887 | t.arg1 = val; | |
1888 | else | |
6dbd0af5 | 1889 | { |
5f144b10 | 1890 | x = val; |
6dbd0af5 MD |
1891 | if (SCM_IMP (x)) |
1892 | { | |
1893 | RETURN (x); | |
1894 | } | |
1895 | else | |
1896 | /* This gives the possibility for the debugger to | |
1897 | modify the source expression before evaluation. */ | |
1898 | goto dispatch; | |
1899 | } | |
1900 | } | |
2f0d1375 | 1901 | scm_ithrow (scm_sym_enter_frame, |
6dbd0af5 MD |
1902 | scm_cons2 (t.arg1, tail, |
1903 | scm_cons (scm_unmemocopy (x, env), SCM_EOL)), | |
1904 | 0); | |
1905 | } | |
6dbd0af5 | 1906 | #endif |
e3173f93 | 1907 | #if defined (USE_THREADS) || defined (DEVAL) |
f8769b1d | 1908 | dispatch: |
e3173f93 | 1909 | #endif |
9cb5124f | 1910 | SCM_TICK; |
0f2d19dd JB |
1911 | switch (SCM_TYP7 (x)) |
1912 | { | |
28b06554 | 1913 | case scm_tc7_symbol: |
0f2d19dd JB |
1914 | /* Only happens when called at top level. |
1915 | */ | |
1916 | x = scm_cons (x, SCM_UNDEFINED); | |
1917 | goto retval; | |
1918 | ||
c209c88e | 1919 | case SCM_BIT8(SCM_IM_AND): |
0f2d19dd JB |
1920 | x = SCM_CDR (x); |
1921 | t.arg1 = x; | |
1922 | while (SCM_NNULLP (t.arg1 = SCM_CDR (t.arg1))) | |
1923 | if (SCM_FALSEP (EVALCAR (x, env))) | |
1924 | { | |
1925 | RETURN (SCM_BOOL_F); | |
1926 | } | |
1927 | else | |
1928 | x = t.arg1; | |
6dbd0af5 | 1929 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
1930 | goto carloop; |
1931 | ||
c209c88e | 1932 | case SCM_BIT8(SCM_IM_BEGIN): |
d9d39d76 MV |
1933 | /* (currently unused) |
1934 | cdrxnoap: */ | |
6dbd0af5 | 1935 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
d9d39d76 MV |
1936 | /* (currently unused) |
1937 | cdrxbegin: */ | |
0f2d19dd JB |
1938 | x = SCM_CDR (x); |
1939 | ||
1940 | begin: | |
4163eb72 MV |
1941 | /* If we are on toplevel with a lookup closure, we need to sync |
1942 | with the current module. */ | |
22a52da1 | 1943 | if (SCM_CONSP (env) && !SCM_CONSP (SCM_CAR (env))) |
4163eb72 MV |
1944 | { |
1945 | t.arg1 = x; | |
d9d39d76 | 1946 | UPDATE_TOPLEVEL_ENV (env); |
22a52da1 | 1947 | while (!SCM_NULLP (t.arg1 = SCM_CDR (t.arg1))) |
4163eb72 | 1948 | { |
5280aaca | 1949 | EVALCAR (x, env); |
4163eb72 | 1950 | x = t.arg1; |
d9d39d76 | 1951 | UPDATE_TOPLEVEL_ENV (env); |
4163eb72 | 1952 | } |
5280aaca | 1953 | goto carloop; |
4163eb72 MV |
1954 | } |
1955 | else | |
5280aaca MV |
1956 | goto nontoplevel_begin; |
1957 | ||
1958 | nontoplevel_cdrxnoap: | |
1959 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
1960 | nontoplevel_cdrxbegin: | |
1961 | x = SCM_CDR (x); | |
1962 | nontoplevel_begin: | |
1963 | t.arg1 = x; | |
22a52da1 | 1964 | while (!SCM_NULLP (t.arg1 = SCM_CDR (t.arg1))) |
0f2d19dd | 1965 | { |
5280aaca | 1966 | if (SCM_IMP (SCM_CAR (x))) |
26d5b9b4 | 1967 | { |
5280aaca | 1968 | if (SCM_ISYMP (SCM_CAR (x))) |
26d5b9b4 | 1969 | { |
5280aaca MV |
1970 | x = scm_m_expand_body (x, env); |
1971 | goto nontoplevel_begin; | |
26d5b9b4 | 1972 | } |
4163eb72 | 1973 | else |
22a52da1 | 1974 | SCM_EVALIM2 (SCM_CAR (x)); |
26d5b9b4 | 1975 | } |
5280aaca MV |
1976 | else |
1977 | SCM_CEVAL (SCM_CAR (x), env); | |
1978 | x = t.arg1; | |
0f2d19dd | 1979 | } |
5280aaca | 1980 | |
0f2d19dd | 1981 | carloop: /* scm_eval car of last form in list */ |
22a52da1 | 1982 | if (!SCM_CELLP (SCM_CAR (x))) |
0f2d19dd JB |
1983 | { |
1984 | x = SCM_CAR (x); | |
6cb702da | 1985 | RETURN (SCM_IMP (x) ? SCM_EVALIM (x, env) : SCM_GLOC_VAL (x)) |
0f2d19dd JB |
1986 | } |
1987 | ||
1988 | if (SCM_SYMBOLP (SCM_CAR (x))) | |
1989 | { | |
1990 | retval: | |
26d5b9b4 | 1991 | RETURN (*scm_lookupcar (x, env, 1)) |
0f2d19dd JB |
1992 | } |
1993 | ||
1994 | x = SCM_CAR (x); | |
1995 | goto loop; /* tail recurse */ | |
1996 | ||
1997 | ||
c209c88e | 1998 | case SCM_BIT8(SCM_IM_CASE): |
0f2d19dd JB |
1999 | x = SCM_CDR (x); |
2000 | t.arg1 = EVALCAR (x, env); | |
2001 | while (SCM_NIMP (x = SCM_CDR (x))) | |
2002 | { | |
2003 | proc = SCM_CAR (x); | |
cf498326 | 2004 | if (SCM_EQ_P (scm_sym_else, SCM_CAR (proc))) |
0f2d19dd JB |
2005 | { |
2006 | x = SCM_CDR (proc); | |
6dbd0af5 | 2007 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
2008 | goto begin; |
2009 | } | |
2010 | proc = SCM_CAR (proc); | |
2011 | while (SCM_NIMP (proc)) | |
2012 | { | |
2013 | if (CHECK_EQVISH (SCM_CAR (proc), t.arg1)) | |
2014 | { | |
2015 | x = SCM_CDR (SCM_CAR (x)); | |
6dbd0af5 | 2016 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
2017 | goto begin; |
2018 | } | |
2019 | proc = SCM_CDR (proc); | |
2020 | } | |
2021 | } | |
6dbd0af5 | 2022 | RETURN (SCM_UNSPECIFIED) |
0f2d19dd JB |
2023 | |
2024 | ||
c209c88e | 2025 | case SCM_BIT8(SCM_IM_COND): |
22a52da1 | 2026 | while (!SCM_IMP (x = SCM_CDR (x))) |
0f2d19dd JB |
2027 | { |
2028 | proc = SCM_CAR (x); | |
2029 | t.arg1 = EVALCAR (proc, env); | |
2030 | if (SCM_NFALSEP (t.arg1)) | |
2031 | { | |
2032 | x = SCM_CDR (proc); | |
22a52da1 | 2033 | if (SCM_NULLP (x)) |
0f2d19dd | 2034 | { |
6dbd0af5 | 2035 | RETURN (t.arg1) |
0f2d19dd | 2036 | } |
22a52da1 | 2037 | if (!SCM_EQ_P (scm_sym_arrow, SCM_CAR (x))) |
6dbd0af5 MD |
2038 | { |
2039 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2040 | goto begin; | |
2041 | } | |
0f2d19dd JB |
2042 | proc = SCM_CDR (x); |
2043 | proc = EVALCAR (proc, env); | |
2044 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
6dbd0af5 MD |
2045 | PREP_APPLY (proc, scm_cons (t.arg1, SCM_EOL)); |
2046 | ENTER_APPLY; | |
a820af98 | 2047 | if (SCM_CLOSUREP(proc) && scm_badformalsp (proc, 1)) |
e37a4fba | 2048 | goto umwrongnumargs; |
0f2d19dd JB |
2049 | goto evap1; |
2050 | } | |
2051 | } | |
6dbd0af5 | 2052 | RETURN (SCM_UNSPECIFIED) |
0f2d19dd JB |
2053 | |
2054 | ||
c209c88e | 2055 | case SCM_BIT8(SCM_IM_DO): |
0f2d19dd JB |
2056 | x = SCM_CDR (x); |
2057 | proc = SCM_CAR (SCM_CDR (x)); /* inits */ | |
2058 | t.arg1 = SCM_EOL; /* values */ | |
2059 | while (SCM_NIMP (proc)) | |
2060 | { | |
2061 | t.arg1 = scm_cons (EVALCAR (proc, env), t.arg1); | |
2062 | proc = SCM_CDR (proc); | |
2063 | } | |
e2806c10 | 2064 | env = EXTEND_ENV (SCM_CAR (x), t.arg1, env); |
0f2d19dd JB |
2065 | x = SCM_CDR (SCM_CDR (x)); |
2066 | while (proc = SCM_CAR (x), SCM_FALSEP (EVALCAR (proc, env))) | |
2067 | { | |
f3d2630a | 2068 | for (proc = SCM_CADR (x); SCM_NIMP (proc); proc = SCM_CDR (proc)) |
0f2d19dd JB |
2069 | { |
2070 | t.arg1 = SCM_CAR (proc); /* body */ | |
2071 | SIDEVAL (t.arg1, env); | |
2072 | } | |
f3d2630a MD |
2073 | for (t.arg1 = SCM_EOL, proc = SCM_CDDR (x); |
2074 | SCM_NIMP (proc); | |
2075 | proc = SCM_CDR (proc)) | |
0f2d19dd | 2076 | t.arg1 = scm_cons (EVALCAR (proc, env), t.arg1); /* steps */ |
e2806c10 | 2077 | env = EXTEND_ENV (SCM_CAR (SCM_CAR (env)), t.arg1, SCM_CDR (env)); |
0f2d19dd JB |
2078 | } |
2079 | x = SCM_CDR (proc); | |
2080 | if (SCM_NULLP (x)) | |
6dbd0af5 MD |
2081 | RETURN (SCM_UNSPECIFIED); |
2082 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
5280aaca | 2083 | goto nontoplevel_begin; |
0f2d19dd JB |
2084 | |
2085 | ||
c209c88e | 2086 | case SCM_BIT8(SCM_IM_IF): |
0f2d19dd JB |
2087 | x = SCM_CDR (x); |
2088 | if (SCM_NFALSEP (EVALCAR (x, env))) | |
2089 | x = SCM_CDR (x); | |
2090 | else if (SCM_IMP (x = SCM_CDR (SCM_CDR (x)))) | |
2091 | { | |
2092 | RETURN (SCM_UNSPECIFIED); | |
2093 | } | |
6dbd0af5 | 2094 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
2095 | goto carloop; |
2096 | ||
2097 | ||
c209c88e | 2098 | case SCM_BIT8(SCM_IM_LET): |
0f2d19dd JB |
2099 | x = SCM_CDR (x); |
2100 | proc = SCM_CAR (SCM_CDR (x)); | |
2101 | t.arg1 = SCM_EOL; | |
2102 | do | |
2103 | { | |
2104 | t.arg1 = scm_cons (EVALCAR (proc, env), t.arg1); | |
2105 | } | |
2106 | while (SCM_NIMP (proc = SCM_CDR (proc))); | |
e2806c10 | 2107 | env = EXTEND_ENV (SCM_CAR (x), t.arg1, env); |
0f2d19dd | 2108 | x = SCM_CDR (x); |
5280aaca | 2109 | goto nontoplevel_cdrxnoap; |
0f2d19dd JB |
2110 | |
2111 | ||
c209c88e | 2112 | case SCM_BIT8(SCM_IM_LETREC): |
0f2d19dd | 2113 | x = SCM_CDR (x); |
e2806c10 | 2114 | env = EXTEND_ENV (SCM_CAR (x), scm_undefineds, env); |
0f2d19dd JB |
2115 | x = SCM_CDR (x); |
2116 | proc = SCM_CAR (x); | |
2117 | t.arg1 = SCM_EOL; | |
2118 | do | |
2119 | { | |
2120 | t.arg1 = scm_cons (EVALCAR (proc, env), t.arg1); | |
2121 | } | |
2122 | while (SCM_NIMP (proc = SCM_CDR (proc))); | |
a23afe53 | 2123 | SCM_SETCDR (SCM_CAR (env), t.arg1); |
5280aaca | 2124 | goto nontoplevel_cdrxnoap; |
0f2d19dd JB |
2125 | |
2126 | ||
c209c88e | 2127 | case SCM_BIT8(SCM_IM_LETSTAR): |
0f2d19dd JB |
2128 | x = SCM_CDR (x); |
2129 | proc = SCM_CAR (x); | |
2130 | if (SCM_IMP (proc)) | |
2131 | { | |
e2806c10 | 2132 | env = EXTEND_ENV (SCM_EOL, SCM_EOL, env); |
5280aaca | 2133 | goto nontoplevel_cdrxnoap; |
0f2d19dd JB |
2134 | } |
2135 | do | |
2136 | { | |
2137 | t.arg1 = SCM_CAR (proc); | |
2138 | proc = SCM_CDR (proc); | |
e2806c10 | 2139 | env = EXTEND_ENV (t.arg1, EVALCAR (proc, env), env); |
0f2d19dd JB |
2140 | } |
2141 | while (SCM_NIMP (proc = SCM_CDR (proc))); | |
5280aaca | 2142 | goto nontoplevel_cdrxnoap; |
0f2d19dd | 2143 | |
c209c88e | 2144 | case SCM_BIT8(SCM_IM_OR): |
0f2d19dd JB |
2145 | x = SCM_CDR (x); |
2146 | t.arg1 = x; | |
22a52da1 | 2147 | while (!SCM_NULLP (t.arg1 = SCM_CDR (t.arg1))) |
0f2d19dd JB |
2148 | { |
2149 | x = EVALCAR (x, env); | |
22a52da1 | 2150 | if (!SCM_FALSEP (x)) |
0f2d19dd JB |
2151 | { |
2152 | RETURN (x); | |
2153 | } | |
2154 | x = t.arg1; | |
2155 | } | |
6dbd0af5 | 2156 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
2157 | goto carloop; |
2158 | ||
2159 | ||
c209c88e | 2160 | case SCM_BIT8(SCM_IM_LAMBDA): |
0f2d19dd JB |
2161 | RETURN (scm_closure (SCM_CDR (x), env)); |
2162 | ||
2163 | ||
c209c88e | 2164 | case SCM_BIT8(SCM_IM_QUOTE): |
0f2d19dd JB |
2165 | RETURN (SCM_CAR (SCM_CDR (x))); |
2166 | ||
2167 | ||
c209c88e | 2168 | case SCM_BIT8(SCM_IM_SET_X): |
0f2d19dd JB |
2169 | x = SCM_CDR (x); |
2170 | proc = SCM_CAR (x); | |
3201d763 | 2171 | switch (SCM_ITAG3 (proc)) |
0f2d19dd | 2172 | { |
3201d763 | 2173 | case scm_tc3_cons: |
26d5b9b4 | 2174 | t.lloc = scm_lookupcar (x, env, 1); |
0f2d19dd | 2175 | break; |
3201d763 | 2176 | case scm_tc3_cons_gloc: |
a23afe53 | 2177 | t.lloc = SCM_GLOC_VAL_LOC (proc); |
0f2d19dd JB |
2178 | break; |
2179 | #ifdef MEMOIZE_LOCALS | |
3201d763 | 2180 | case scm_tc3_imm24: |
0f2d19dd JB |
2181 | t.lloc = scm_ilookup (proc, env); |
2182 | break; | |
2183 | #endif | |
2184 | } | |
2185 | x = SCM_CDR (x); | |
2186 | *t.lloc = EVALCAR (x, env); | |
0f2d19dd JB |
2187 | #ifdef SICP |
2188 | RETURN (*t.lloc); | |
2189 | #else | |
2190 | RETURN (SCM_UNSPECIFIED); | |
2191 | #endif | |
2192 | ||
2193 | ||
c209c88e | 2194 | case SCM_BIT8(SCM_IM_DEFINE): /* only for internal defines */ |
26d5b9b4 MD |
2195 | scm_misc_error (NULL, "Bad define placement", SCM_EOL); |
2196 | ||
0f2d19dd | 2197 | /* new syntactic forms go here. */ |
c209c88e | 2198 | case SCM_BIT8(SCM_MAKISYM (0)): |
0f2d19dd JB |
2199 | proc = SCM_CAR (x); |
2200 | SCM_ASRTGO (SCM_ISYMP (proc), badfun); | |
2201 | switch SCM_ISYMNUM (proc) | |
2202 | { | |
0f2d19dd JB |
2203 | case (SCM_ISYMNUM (SCM_IM_APPLY)): |
2204 | proc = SCM_CDR (x); | |
2205 | proc = EVALCAR (proc, env); | |
2206 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
2207 | if (SCM_CLOSUREP (proc)) | |
2208 | { | |
1609038c | 2209 | SCM argl, tl; |
6dbd0af5 | 2210 | PREP_APPLY (proc, SCM_EOL); |
0f2d19dd JB |
2211 | t.arg1 = SCM_CDR (SCM_CDR (x)); |
2212 | t.arg1 = EVALCAR (t.arg1, env); | |
a513ead3 MV |
2213 | apply_closure: |
2214 | /* Go here to tail-call a closure. PROC is the closure | |
2215 | and T.ARG1 is the list of arguments. Do not forget to | |
2216 | call PREP_APPLY. */ | |
6dbd0af5 MD |
2217 | #ifdef DEVAL |
2218 | debug.info->a.args = t.arg1; | |
2219 | #endif | |
cf7c17e9 | 2220 | #ifndef SCM_RECKLESS |
726d810a | 2221 | if (scm_badargsp (SCM_CLOSURE_FORMALS (proc), t.arg1)) |
0f2d19dd JB |
2222 | goto wrongnumargs; |
2223 | #endif | |
c79450dd | 2224 | ENTER_APPLY; |
1609038c MD |
2225 | /* Copy argument list */ |
2226 | if (SCM_IMP (t.arg1)) | |
2227 | argl = t.arg1; | |
2228 | else | |
2229 | { | |
2230 | argl = tl = scm_cons (SCM_CAR (t.arg1), SCM_UNSPECIFIED); | |
2231 | while (SCM_NIMP (t.arg1 = SCM_CDR (t.arg1)) | |
2232 | && SCM_CONSP (t.arg1)) | |
2233 | { | |
2234 | SCM_SETCDR (tl, scm_cons (SCM_CAR (t.arg1), | |
2235 | SCM_UNSPECIFIED)); | |
2236 | tl = SCM_CDR (tl); | |
2237 | } | |
2238 | SCM_SETCDR (tl, t.arg1); | |
2239 | } | |
2240 | ||
726d810a | 2241 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), argl, SCM_ENV (proc)); |
0f2d19dd | 2242 | x = SCM_CODE (proc); |
5280aaca | 2243 | goto nontoplevel_cdrxbegin; |
0f2d19dd | 2244 | } |
81123e6d | 2245 | proc = scm_f_apply; |
0f2d19dd JB |
2246 | goto evapply; |
2247 | ||
2248 | case (SCM_ISYMNUM (SCM_IM_CONT)): | |
5f144b10 GH |
2249 | { |
2250 | int first; | |
2251 | SCM val = scm_make_continuation (&first); | |
2252 | ||
2253 | if (first) | |
2254 | t.arg1 = val; | |
2255 | else | |
2256 | RETURN (val); | |
2257 | } | |
0f2d19dd JB |
2258 | proc = SCM_CDR (x); |
2259 | proc = evalcar (proc, env); | |
2260 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
6dbd0af5 MD |
2261 | PREP_APPLY (proc, scm_cons (t.arg1, SCM_EOL)); |
2262 | ENTER_APPLY; | |
a820af98 | 2263 | if (SCM_CLOSUREP(proc) && scm_badformalsp (proc, 1)) |
e37a4fba | 2264 | goto umwrongnumargs; |
0f2d19dd JB |
2265 | goto evap1; |
2266 | ||
a570e93a MD |
2267 | case (SCM_ISYMNUM (SCM_IM_DELAY)): |
2268 | RETURN (scm_makprom (scm_closure (SCM_CDR (x), env))) | |
2269 | ||
89efbff4 | 2270 | case (SCM_ISYMNUM (SCM_IM_DISPATCH)): |
195847fa MD |
2271 | proc = SCM_CADR (x); /* unevaluated operands */ |
2272 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2273 | if (SCM_IMP (proc)) | |
2274 | arg2 = *scm_ilookup (proc, env); | |
2275 | else if (SCM_NCONSP (proc)) | |
2276 | { | |
2277 | if (SCM_NCELLP (proc)) | |
2278 | arg2 = SCM_GLOC_VAL (proc); | |
2279 | else | |
2280 | arg2 = *scm_lookupcar (SCM_CDR (x), env, 1); | |
2281 | } | |
2282 | else | |
2283 | { | |
2284 | arg2 = scm_cons (EVALCAR (proc, env), SCM_EOL); | |
2285 | t.lloc = SCM_CDRLOC (arg2); | |
2286 | while (SCM_NIMP (proc = SCM_CDR (proc))) | |
2287 | { | |
2288 | *t.lloc = scm_cons (EVALCAR (proc, env), SCM_EOL); | |
2289 | t.lloc = SCM_CDRLOC (*t.lloc); | |
2290 | } | |
2291 | } | |
2292 | ||
2293 | type_dispatch: | |
61364ba6 MD |
2294 | /* The type dispatch code is duplicated here |
2295 | * (c.f. objects.c:scm_mcache_compute_cmethod) since that | |
2296 | * cuts down execution time for type dispatch to 50%. | |
2297 | */ | |
2298 | { | |
2299 | int i, n, end, mask; | |
2300 | SCM z = SCM_CDDR (x); | |
2301 | n = SCM_INUM (SCM_CAR (z)); /* maximum number of specializers */ | |
2302 | proc = SCM_CADR (z); | |
2303 | ||
2304 | if (SCM_NIMP (proc)) | |
2305 | { | |
2306 | /* Prepare for linear search */ | |
2307 | mask = -1; | |
2308 | i = 0; | |
b5c2579a | 2309 | end = SCM_VECTOR_LENGTH (proc); |
61364ba6 MD |
2310 | } |
2311 | else | |
2312 | { | |
2313 | /* Compute a hash value */ | |
2314 | int hashset = SCM_INUM (proc); | |
2315 | int j = n; | |
2316 | mask = SCM_INUM (SCM_CAR (z = SCM_CDDR (z))); | |
2317 | proc = SCM_CADR (z); | |
2318 | i = 0; | |
2319 | t.arg1 = arg2; | |
2320 | if (SCM_NIMP (t.arg1)) | |
2321 | do | |
2322 | { | |
d8c40b9f DH |
2323 | i += SCM_STRUCT_DATA (scm_class_of (SCM_CAR (t.arg1))) |
2324 | [scm_si_hashsets + hashset]; | |
61364ba6 MD |
2325 | t.arg1 = SCM_CDR (t.arg1); |
2326 | } | |
4ea6a431 | 2327 | while (j-- && SCM_NIMP (t.arg1)); |
61364ba6 MD |
2328 | i &= mask; |
2329 | end = i; | |
2330 | } | |
2331 | ||
2332 | /* Search for match */ | |
2333 | do | |
2334 | { | |
2335 | int j = n; | |
2336 | z = SCM_VELTS (proc)[i]; | |
2337 | t.arg1 = arg2; /* list of arguments */ | |
2338 | if (SCM_NIMP (t.arg1)) | |
2339 | do | |
2340 | { | |
2341 | /* More arguments than specifiers => CLASS != ENV */ | |
cf498326 | 2342 | if (! SCM_EQ_P (scm_class_of (SCM_CAR (t.arg1)), SCM_CAR (z))) |
61364ba6 MD |
2343 | goto next_method; |
2344 | t.arg1 = SCM_CDR (t.arg1); | |
2345 | z = SCM_CDR (z); | |
2346 | } | |
4ea6a431 | 2347 | while (j-- && SCM_NIMP (t.arg1)); |
61364ba6 MD |
2348 | /* Fewer arguments than specifiers => CAR != ENV */ |
2349 | if (!(SCM_IMP (SCM_CAR (z)) || SCM_CONSP (SCM_CAR (z)))) | |
2350 | goto next_method; | |
2351 | apply_cmethod: | |
2352 | env = EXTEND_ENV (SCM_CAR (SCM_CMETHOD_CODE (z)), | |
2353 | arg2, | |
2354 | SCM_CMETHOD_ENV (z)); | |
2355 | x = SCM_CMETHOD_CODE (z); | |
5280aaca | 2356 | goto nontoplevel_cdrxbegin; |
61364ba6 MD |
2357 | next_method: |
2358 | i = (i + 1) & mask; | |
2359 | } while (i != end); | |
2360 | ||
2361 | z = scm_memoize_method (x, arg2); | |
2362 | goto apply_cmethod; | |
2363 | } | |
73b64342 | 2364 | |
ca4be6ea MD |
2365 | case (SCM_ISYMNUM (SCM_IM_SLOT_REF)): |
2366 | x = SCM_CDR (x); | |
2367 | t.arg1 = EVALCAR (x, env); | |
d8c40b9f | 2368 | RETURN (SCM_PACK (SCM_STRUCT_DATA (t.arg1) [SCM_INUM (SCM_CADR (x))])) |
ca4be6ea MD |
2369 | |
2370 | case (SCM_ISYMNUM (SCM_IM_SLOT_SET_X)): | |
2371 | x = SCM_CDR (x); | |
2372 | t.arg1 = EVALCAR (x, env); | |
2373 | x = SCM_CDR (x); | |
2374 | proc = SCM_CDR (x); | |
d8c40b9f DH |
2375 | SCM_STRUCT_DATA (t.arg1) [SCM_INUM (SCM_CAR (x))] |
2376 | = SCM_UNPACK (EVALCAR (proc, env)); | |
5623a9b4 | 2377 | RETURN (SCM_UNSPECIFIED) |
ca4be6ea | 2378 | |
73b64342 MD |
2379 | case (SCM_ISYMNUM (SCM_IM_NIL_COND)): |
2380 | proc = SCM_CDR (x); | |
2381 | while (SCM_NIMP (x = SCM_CDR (proc))) | |
2382 | { | |
2383 | if (!(SCM_FALSEP (t.arg1 = EVALCAR (proc, env)) | |
3201d763 | 2384 | || SCM_EQ_P (t.arg1, scm_lisp_nil))) |
73b64342 | 2385 | { |
cf498326 | 2386 | if (SCM_EQ_P (SCM_CAR (x), SCM_UNSPECIFIED)) |
73b64342 MD |
2387 | RETURN (t.arg1); |
2388 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2389 | goto carloop; | |
2390 | } | |
2391 | proc = SCM_CDR (x); | |
2392 | } | |
2393 | x = proc; | |
2394 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2395 | goto carloop; | |
2396 | ||
2397 | case (SCM_ISYMNUM (SCM_IM_NIL_IFY)): | |
2398 | x = SCM_CDR (x); | |
2399 | RETURN ((SCM_FALSEP (proc = EVALCAR (x, env)) || SCM_NULLP (proc)) | |
43a912cf | 2400 | ? scm_lisp_nil |
73b64342 MD |
2401 | : proc) |
2402 | ||
2403 | case (SCM_ISYMNUM (SCM_IM_T_IFY)): | |
2404 | x = SCM_CDR (x); | |
43a912cf | 2405 | RETURN (SCM_NFALSEP (EVALCAR (x, env)) ? scm_lisp_t : scm_lisp_nil) |
73b64342 MD |
2406 | |
2407 | case (SCM_ISYMNUM (SCM_IM_0_COND)): | |
2408 | proc = SCM_CDR (x); | |
2409 | while (SCM_NIMP (x = SCM_CDR (proc))) | |
2410 | { | |
2411 | if (!(SCM_FALSEP (t.arg1 = EVALCAR (proc, env)) | |
3201d763 | 2412 | || SCM_EQ_P (t.arg1, SCM_INUM0))) |
73b64342 | 2413 | { |
cf498326 | 2414 | if (SCM_EQ_P (SCM_CAR (x), SCM_UNSPECIFIED)) |
73b64342 MD |
2415 | RETURN (t.arg1); |
2416 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2417 | goto carloop; | |
2418 | } | |
2419 | proc = SCM_CDR (x); | |
2420 | } | |
2421 | x = proc; | |
2422 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2423 | goto carloop; | |
2424 | ||
2425 | case (SCM_ISYMNUM (SCM_IM_0_IFY)): | |
2426 | x = SCM_CDR (x); | |
2427 | RETURN (SCM_FALSEP (proc = EVALCAR (x, env)) | |
2428 | ? SCM_INUM0 | |
2429 | : proc) | |
2430 | ||
2431 | case (SCM_ISYMNUM (SCM_IM_1_IFY)): | |
2432 | x = SCM_CDR (x); | |
2433 | RETURN (SCM_NFALSEP (EVALCAR (x, env)) | |
2434 | ? SCM_MAKINUM (1) | |
2435 | : SCM_INUM0) | |
2436 | ||
2437 | case (SCM_ISYMNUM (SCM_IM_BIND)): | |
2438 | x = SCM_CDR (x); | |
2439 | ||
2440 | t.arg1 = SCM_CAR (x); | |
2441 | arg2 = SCM_CDAR (env); | |
2442 | while (SCM_NIMP (arg2)) | |
2443 | { | |
2444 | proc = SCM_GLOC_VAL (SCM_CAR (t.arg1)); | |
a963f787 MD |
2445 | SCM_SETCDR (SCM_PACK (SCM_UNPACK (SCM_CAR (t.arg1)) - 1L), |
2446 | SCM_CAR (arg2)); | |
73b64342 MD |
2447 | SCM_SETCAR (arg2, proc); |
2448 | t.arg1 = SCM_CDR (t.arg1); | |
2449 | arg2 = SCM_CDR (arg2); | |
2450 | } | |
2451 | t.arg1 = SCM_CAR (x); | |
2452 | scm_dynwinds = scm_acons (t.arg1, SCM_CDAR (env), scm_dynwinds); | |
89efbff4 | 2453 | |
73b64342 MD |
2454 | arg2 = x = SCM_CDR (x); |
2455 | while (SCM_NNULLP (arg2 = SCM_CDR (arg2))) | |
2456 | { | |
2457 | SIDEVAL (SCM_CAR (x), env); | |
2458 | x = arg2; | |
2459 | } | |
2460 | proc = EVALCAR (x, env); | |
2461 | ||
2462 | scm_dynwinds = SCM_CDR (scm_dynwinds); | |
2463 | arg2 = SCM_CDAR (env); | |
2464 | while (SCM_NIMP (arg2)) | |
2465 | { | |
a963f787 MD |
2466 | SCM_SETCDR (SCM_PACK (SCM_UNPACK (SCM_CAR (t.arg1)) - 1L), |
2467 | SCM_CAR (arg2)); | |
73b64342 MD |
2468 | t.arg1 = SCM_CDR (t.arg1); |
2469 | arg2 = SCM_CDR (arg2); | |
2470 | } | |
2471 | ||
a513ead3 | 2472 | RETURN (proc); |
73b64342 | 2473 | |
a513ead3 MV |
2474 | case (SCM_ISYMNUM (SCM_IM_CALL_WITH_VALUES)): |
2475 | { | |
2476 | proc = SCM_CDR (x); | |
2477 | x = EVALCAR (proc, env); | |
2478 | proc = SCM_CDR (proc); | |
2479 | proc = EVALCAR (proc, env); | |
2480 | t.arg1 = SCM_APPLY (x, SCM_EOL, SCM_EOL); | |
2481 | if (SCM_VALUESP (t.arg1)) | |
2482 | t.arg1 = scm_struct_ref (t.arg1, SCM_INUM0); | |
2483 | else | |
2484 | t.arg1 = scm_cons (t.arg1, SCM_EOL); | |
2485 | if (SCM_CLOSUREP (proc)) | |
2486 | { | |
2487 | PREP_APPLY (proc, t.arg1); | |
2488 | goto apply_closure; | |
2489 | } | |
2490 | return SCM_APPLY (proc, t.arg1, SCM_EOL); | |
2491 | } | |
2492 | ||
0f2d19dd JB |
2493 | default: |
2494 | goto badfun; | |
2495 | } | |
2496 | ||
2497 | default: | |
2498 | proc = x; | |
2499 | badfun: | |
f5bf2977 | 2500 | /* scm_everr (x, env,...) */ |
e0c08f17 | 2501 | scm_misc_error (NULL, "Wrong type to apply: ~S", SCM_LIST1 (proc)); |
0f2d19dd JB |
2502 | case scm_tc7_vector: |
2503 | case scm_tc7_wvect: | |
afe5177e | 2504 | #ifdef HAVE_ARRAYS |
0f2d19dd JB |
2505 | case scm_tc7_bvect: |
2506 | case scm_tc7_byvect: | |
2507 | case scm_tc7_svect: | |
2508 | case scm_tc7_ivect: | |
2509 | case scm_tc7_uvect: | |
2510 | case scm_tc7_fvect: | |
2511 | case scm_tc7_dvect: | |
2512 | case scm_tc7_cvect: | |
5c11cc9d | 2513 | #ifdef HAVE_LONG_LONGS |
0f2d19dd | 2514 | case scm_tc7_llvect: |
afe5177e | 2515 | #endif |
0f2d19dd JB |
2516 | #endif |
2517 | case scm_tc7_string: | |
0f2d19dd | 2518 | case scm_tc7_substring: |
0f2d19dd JB |
2519 | case scm_tc7_smob: |
2520 | case scm_tcs_closures: | |
224822be | 2521 | case scm_tc7_cclo: |
89efbff4 | 2522 | case scm_tc7_pws: |
0f2d19dd JB |
2523 | case scm_tcs_subrs: |
2524 | RETURN (x); | |
2525 | ||
2526 | #ifdef MEMOIZE_LOCALS | |
c209c88e | 2527 | case SCM_BIT8(SCM_ILOC00): |
0f2d19dd JB |
2528 | proc = *scm_ilookup (SCM_CAR (x), env); |
2529 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
cf7c17e9 JB |
2530 | #ifndef SCM_RECKLESS |
2531 | #ifdef SCM_CAUTIOUS | |
0f2d19dd JB |
2532 | goto checkargs; |
2533 | #endif | |
2534 | #endif | |
2535 | break; | |
2536 | #endif /* ifdef MEMOIZE_LOCALS */ | |
2537 | ||
2538 | ||
3201d763 DH |
2539 | case scm_tcs_cons_gloc: { |
2540 | scm_bits_t vcell = SCM_STRUCT_VTABLE_DATA (x) [scm_vtable_index_vcell]; | |
2541 | if (vcell == 0) { | |
aa00bd1e MD |
2542 | /* This is a struct implanted in the code, not a gloc. */ |
2543 | RETURN (x); | |
3201d763 DH |
2544 | } else { |
2545 | proc = SCM_PACK (vcell); | |
2546 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
cf7c17e9 JB |
2547 | #ifndef SCM_RECKLESS |
2548 | #ifdef SCM_CAUTIOUS | |
3201d763 | 2549 | goto checkargs; |
0f2d19dd JB |
2550 | #endif |
2551 | #endif | |
3201d763 | 2552 | } |
0f2d19dd | 2553 | break; |
3201d763 | 2554 | } |
0f2d19dd JB |
2555 | |
2556 | case scm_tcs_cons_nimcar: | |
2557 | if (SCM_SYMBOLP (SCM_CAR (x))) | |
2558 | { | |
f8769b1d | 2559 | #ifdef USE_THREADS |
26d5b9b4 | 2560 | t.lloc = scm_lookupcar1 (x, env, 1); |
f8769b1d MV |
2561 | if (t.lloc == NULL) |
2562 | { | |
2563 | /* we have lost the race, start again. */ | |
2564 | goto dispatch; | |
2565 | } | |
2566 | proc = *t.lloc; | |
2567 | #else | |
26d5b9b4 | 2568 | proc = *scm_lookupcar (x, env, 1); |
f8769b1d MV |
2569 | #endif |
2570 | ||
0f2d19dd JB |
2571 | if (SCM_IMP (proc)) |
2572 | { | |
2573 | unmemocar (x, env); | |
2574 | goto badfun; | |
2575 | } | |
22a52da1 | 2576 | if (SCM_MACROP (proc)) |
0f2d19dd JB |
2577 | { |
2578 | unmemocar (x, env); | |
2579 | ||
2580 | handle_a_macro: | |
368bf056 | 2581 | #ifdef DEVAL |
7c354052 MD |
2582 | /* Set a flag during macro expansion so that macro |
2583 | application frames can be deleted from the backtrace. */ | |
2584 | SCM_SET_MACROEXP (debug); | |
368bf056 | 2585 | #endif |
22a52da1 | 2586 | t.arg1 = SCM_APPLY (SCM_MACRO_CODE (proc), x, |
f8769b1d MV |
2587 | scm_cons (env, scm_listofnull)); |
2588 | ||
7c354052 MD |
2589 | #ifdef DEVAL |
2590 | SCM_CLEAR_MACROEXP (debug); | |
2591 | #endif | |
22a52da1 | 2592 | switch (SCM_MACRO_TYPE (proc)) |
0f2d19dd JB |
2593 | { |
2594 | case 2: | |
2595 | if (scm_ilength (t.arg1) <= 0) | |
2596 | t.arg1 = scm_cons2 (SCM_IM_BEGIN, t.arg1, SCM_EOL); | |
6dbd0af5 | 2597 | #ifdef DEVAL |
22a52da1 | 2598 | if (!SCM_CLOSUREP (SCM_MACRO_CODE (proc))) |
6dbd0af5 | 2599 | { |
6dbd0af5 | 2600 | SCM_DEFER_INTS; |
a23afe53 MD |
2601 | SCM_SETCAR (x, SCM_CAR (t.arg1)); |
2602 | SCM_SETCDR (x, SCM_CDR (t.arg1)); | |
6dbd0af5 MD |
2603 | SCM_ALLOW_INTS; |
2604 | goto dispatch; | |
2605 | } | |
2606 | /* Prevent memoizing of debug info expression. */ | |
6203706f MD |
2607 | debug.info->e.exp = scm_cons_source (debug.info->e.exp, |
2608 | SCM_CAR (x), | |
2609 | SCM_CDR (x)); | |
6dbd0af5 | 2610 | #endif |
0f2d19dd | 2611 | SCM_DEFER_INTS; |
a23afe53 MD |
2612 | SCM_SETCAR (x, SCM_CAR (t.arg1)); |
2613 | SCM_SETCDR (x, SCM_CDR (t.arg1)); | |
0f2d19dd | 2614 | SCM_ALLOW_INTS; |
6dbd0af5 | 2615 | goto loopnoap; |
0f2d19dd JB |
2616 | case 1: |
2617 | if (SCM_NIMP (x = t.arg1)) | |
6dbd0af5 | 2618 | goto loopnoap; |
0f2d19dd JB |
2619 | case 0: |
2620 | RETURN (t.arg1); | |
2621 | } | |
2622 | } | |
2623 | } | |
2624 | else | |
2625 | proc = SCM_CEVAL (SCM_CAR (x), env); | |
22a52da1 | 2626 | SCM_ASRTGO (!SCM_IMP (proc), badfun); |
cf7c17e9 JB |
2627 | #ifndef SCM_RECKLESS |
2628 | #ifdef SCM_CAUTIOUS | |
0f2d19dd JB |
2629 | checkargs: |
2630 | #endif | |
2631 | if (SCM_CLOSUREP (proc)) | |
2632 | { | |
726d810a | 2633 | arg2 = SCM_CLOSURE_FORMALS (proc); |
0f2d19dd | 2634 | t.arg1 = SCM_CDR (x); |
726d810a | 2635 | while (!SCM_NULLP (arg2)) |
0f2d19dd | 2636 | { |
22a52da1 | 2637 | if (!SCM_CONSP (arg2)) |
0f2d19dd JB |
2638 | goto evapply; |
2639 | if (SCM_IMP (t.arg1)) | |
2640 | goto umwrongnumargs; | |
2641 | arg2 = SCM_CDR (arg2); | |
2642 | t.arg1 = SCM_CDR (t.arg1); | |
2643 | } | |
22a52da1 | 2644 | if (!SCM_NULLP (t.arg1)) |
0f2d19dd JB |
2645 | goto umwrongnumargs; |
2646 | } | |
22a52da1 | 2647 | else if (SCM_MACROP (proc)) |
0f2d19dd JB |
2648 | goto handle_a_macro; |
2649 | #endif | |
2650 | } | |
2651 | ||
2652 | ||
6dbd0af5 MD |
2653 | evapply: |
2654 | PREP_APPLY (proc, SCM_EOL); | |
2655 | if (SCM_NULLP (SCM_CDR (x))) { | |
2656 | ENTER_APPLY; | |
89efbff4 | 2657 | evap0: |
0f2d19dd JB |
2658 | switch (SCM_TYP7 (proc)) |
2659 | { /* no arguments given */ | |
2660 | case scm_tc7_subr_0: | |
2661 | RETURN (SCM_SUBRF (proc) ()); | |
2662 | case scm_tc7_subr_1o: | |
2663 | RETURN (SCM_SUBRF (proc) (SCM_UNDEFINED)); | |
2664 | case scm_tc7_lsubr: | |
2665 | RETURN (SCM_SUBRF (proc) (SCM_EOL)); | |
2666 | case scm_tc7_rpsubr: | |
2667 | RETURN (SCM_BOOL_T); | |
2668 | case scm_tc7_asubr: | |
2669 | RETURN (SCM_SUBRF (proc) (SCM_UNDEFINED, SCM_UNDEFINED)); | |
0717dfd8 | 2670 | case scm_tc7_smob: |
68b06924 | 2671 | if (!SCM_SMOB_APPLICABLE_P (proc)) |
0717dfd8 | 2672 | goto badfun; |
68b06924 | 2673 | RETURN (SCM_SMOB_APPLY_0 (proc)); |
0f2d19dd JB |
2674 | case scm_tc7_cclo: |
2675 | t.arg1 = proc; | |
2676 | proc = SCM_CCLO_SUBR (proc); | |
6dbd0af5 MD |
2677 | #ifdef DEVAL |
2678 | debug.info->a.proc = proc; | |
2679 | debug.info->a.args = scm_cons (t.arg1, SCM_EOL); | |
2680 | #endif | |
0f2d19dd | 2681 | goto evap1; |
89efbff4 MD |
2682 | case scm_tc7_pws: |
2683 | proc = SCM_PROCEDURE (proc); | |
2684 | #ifdef DEVAL | |
2685 | debug.info->a.proc = proc; | |
2686 | #endif | |
002f1a5d MD |
2687 | if (!SCM_CLOSUREP (proc)) |
2688 | goto evap0; | |
2689 | if (scm_badformalsp (proc, 0)) | |
2690 | goto umwrongnumargs; | |
0f2d19dd JB |
2691 | case scm_tcs_closures: |
2692 | x = SCM_CODE (proc); | |
726d810a | 2693 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), SCM_EOL, SCM_ENV (proc)); |
5280aaca | 2694 | goto nontoplevel_cdrxbegin; |
da7f71d7 | 2695 | case scm_tcs_cons_gloc: |
195847fa MD |
2696 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) |
2697 | { | |
2698 | x = SCM_ENTITY_PROCEDURE (proc); | |
2699 | arg2 = SCM_EOL; | |
2700 | goto type_dispatch; | |
2701 | } | |
2702 | else if (!SCM_I_OPERATORP (proc)) | |
9b07e212 MD |
2703 | goto badfun; |
2704 | else | |
da7f71d7 | 2705 | { |
195847fa MD |
2706 | t.arg1 = proc; |
2707 | proc = (SCM_I_ENTITYP (proc) | |
2708 | ? SCM_ENTITY_PROCEDURE (proc) | |
2709 | : SCM_OPERATOR_PROCEDURE (proc)); | |
da7f71d7 | 2710 | #ifdef DEVAL |
195847fa MD |
2711 | debug.info->a.proc = proc; |
2712 | debug.info->a.args = scm_cons (t.arg1, SCM_EOL); | |
da7f71d7 | 2713 | #endif |
195847fa MD |
2714 | if (SCM_NIMP (proc)) |
2715 | goto evap1; | |
2716 | else | |
2717 | goto badfun; | |
da7f71d7 | 2718 | } |
0f2d19dd JB |
2719 | case scm_tc7_subr_1: |
2720 | case scm_tc7_subr_2: | |
2721 | case scm_tc7_subr_2o: | |
2722 | case scm_tc7_cxr: | |
2723 | case scm_tc7_subr_3: | |
2724 | case scm_tc7_lsubr_2: | |
2725 | umwrongnumargs: | |
2726 | unmemocar (x, env); | |
2727 | wrongnumargs: | |
f5bf2977 GH |
2728 | /* scm_everr (x, env,...) */ |
2729 | scm_wrong_num_args (proc); | |
0f2d19dd JB |
2730 | default: |
2731 | /* handle macros here */ | |
2732 | goto badfun; | |
2733 | } | |
6dbd0af5 | 2734 | } |
0f2d19dd JB |
2735 | |
2736 | /* must handle macros by here */ | |
2737 | x = SCM_CDR (x); | |
cf7c17e9 | 2738 | #ifdef SCM_CAUTIOUS |
0f2d19dd JB |
2739 | if (SCM_IMP (x)) |
2740 | goto wrongnumargs; | |
680ed4a8 MD |
2741 | else if (SCM_CONSP (x)) |
2742 | { | |
2743 | if (SCM_IMP (SCM_CAR (x))) | |
6cb702da | 2744 | t.arg1 = SCM_EVALIM (SCM_CAR (x), env); |
680ed4a8 MD |
2745 | else |
2746 | t.arg1 = EVALCELLCAR (x, env); | |
2747 | } | |
3201d763 | 2748 | else if (SCM_TYP3 (x) == scm_tc3_cons_gloc) |
680ed4a8 | 2749 | { |
3201d763 DH |
2750 | scm_bits_t vcell = SCM_STRUCT_VTABLE_DATA (x) [scm_vtable_index_vcell]; |
2751 | if (vcell == 0) | |
680ed4a8 | 2752 | t.arg1 = SCM_CAR (x); /* struct planted in code */ |
3201d763 DH |
2753 | else |
2754 | t.arg1 = SCM_PACK (vcell); | |
680ed4a8 MD |
2755 | } |
2756 | else | |
2757 | goto wrongnumargs; | |
2758 | #else | |
0f2d19dd | 2759 | t.arg1 = EVALCAR (x, env); |
680ed4a8 | 2760 | #endif |
6dbd0af5 MD |
2761 | #ifdef DEVAL |
2762 | debug.info->a.args = scm_cons (t.arg1, SCM_EOL); | |
2763 | #endif | |
0f2d19dd JB |
2764 | x = SCM_CDR (x); |
2765 | if (SCM_NULLP (x)) | |
2766 | { | |
6dbd0af5 | 2767 | ENTER_APPLY; |
0f2d19dd JB |
2768 | evap1: |
2769 | switch (SCM_TYP7 (proc)) | |
6dbd0af5 | 2770 | { /* have one argument in t.arg1 */ |
0f2d19dd JB |
2771 | case scm_tc7_subr_2o: |
2772 | RETURN (SCM_SUBRF (proc) (t.arg1, SCM_UNDEFINED)); | |
2773 | case scm_tc7_subr_1: | |
2774 | case scm_tc7_subr_1o: | |
2775 | RETURN (SCM_SUBRF (proc) (t.arg1)); | |
2776 | case scm_tc7_cxr: | |
0f2d19dd JB |
2777 | if (SCM_SUBRF (proc)) |
2778 | { | |
2779 | if (SCM_INUMP (t.arg1)) | |
2780 | { | |
f8de44c1 | 2781 | RETURN (scm_make_real (SCM_DSUBRF (proc) ((double) SCM_INUM (t.arg1)))); |
0f2d19dd JB |
2782 | } |
2783 | SCM_ASRTGO (SCM_NIMP (t.arg1), floerr); | |
2784 | if (SCM_REALP (t.arg1)) | |
2785 | { | |
eb42e2f0 | 2786 | RETURN (scm_make_real (SCM_DSUBRF (proc) (SCM_REAL_VALUE (t.arg1)))); |
0f2d19dd JB |
2787 | } |
2788 | #ifdef SCM_BIGDIG | |
2789 | if (SCM_BIGP (t.arg1)) | |
2790 | { | |
f8de44c1 | 2791 | RETURN (scm_make_real (SCM_DSUBRF (proc) (scm_big2dbl (t.arg1)))); |
0f2d19dd JB |
2792 | } |
2793 | #endif | |
2794 | floerr: | |
9de33deb | 2795 | SCM_WTA_DISPATCH_1 (*SCM_SUBR_GENERIC (proc), t.arg1, |
3db4adfc | 2796 | SCM_ARG1, SCM_SYMBOL_CHARS (SCM_SNAME (proc))); |
0f2d19dd | 2797 | } |
3201d763 | 2798 | proc = SCM_SNAME (proc); |
0f2d19dd | 2799 | { |
b5c2579a | 2800 | char *chrs = SCM_SYMBOL_CHARS (proc) + SCM_SYMBOL_LENGTH (proc) - 1; |
0f2d19dd JB |
2801 | while ('c' != *--chrs) |
2802 | { | |
0c95b57d | 2803 | SCM_ASSERT (SCM_CONSP (t.arg1), |
3db4adfc | 2804 | t.arg1, SCM_ARG1, SCM_SYMBOL_CHARS (proc)); |
0f2d19dd JB |
2805 | t.arg1 = ('a' == *chrs) ? SCM_CAR (t.arg1) : SCM_CDR (t.arg1); |
2806 | } | |
2807 | RETURN (t.arg1); | |
2808 | } | |
2809 | case scm_tc7_rpsubr: | |
2810 | RETURN (SCM_BOOL_T); | |
2811 | case scm_tc7_asubr: | |
2812 | RETURN (SCM_SUBRF (proc) (t.arg1, SCM_UNDEFINED)); | |
2813 | case scm_tc7_lsubr: | |
2814 | #ifdef DEVAL | |
6dbd0af5 | 2815 | RETURN (SCM_SUBRF (proc) (debug.info->a.args)) |
0f2d19dd JB |
2816 | #else |
2817 | RETURN (SCM_SUBRF (proc) (scm_cons (t.arg1, SCM_EOL))); | |
2818 | #endif | |
0717dfd8 | 2819 | case scm_tc7_smob: |
68b06924 | 2820 | if (!SCM_SMOB_APPLICABLE_P (proc)) |
0717dfd8 | 2821 | goto badfun; |
68b06924 | 2822 | RETURN (SCM_SMOB_APPLY_1 (proc, t.arg1)); |
0f2d19dd JB |
2823 | case scm_tc7_cclo: |
2824 | arg2 = t.arg1; | |
2825 | t.arg1 = proc; | |
2826 | proc = SCM_CCLO_SUBR (proc); | |
6dbd0af5 MD |
2827 | #ifdef DEVAL |
2828 | debug.info->a.args = scm_cons (t.arg1, debug.info->a.args); | |
2829 | debug.info->a.proc = proc; | |
2830 | #endif | |
0f2d19dd | 2831 | goto evap2; |
89efbff4 MD |
2832 | case scm_tc7_pws: |
2833 | proc = SCM_PROCEDURE (proc); | |
2834 | #ifdef DEVAL | |
2835 | debug.info->a.proc = proc; | |
2836 | #endif | |
002f1a5d MD |
2837 | if (!SCM_CLOSUREP (proc)) |
2838 | goto evap1; | |
2839 | if (scm_badformalsp (proc, 1)) | |
2840 | goto umwrongnumargs; | |
0f2d19dd | 2841 | case scm_tcs_closures: |
195847fa | 2842 | /* clos1: */ |
0f2d19dd JB |
2843 | x = SCM_CODE (proc); |
2844 | #ifdef DEVAL | |
726d810a | 2845 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), debug.info->a.args, SCM_ENV (proc)); |
0f2d19dd | 2846 | #else |
726d810a | 2847 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), scm_cons (t.arg1, SCM_EOL), SCM_ENV (proc)); |
0f2d19dd | 2848 | #endif |
5280aaca | 2849 | goto nontoplevel_cdrxbegin; |
0c32d76c | 2850 | case scm_tcs_cons_gloc: |
f3d2630a MD |
2851 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) |
2852 | { | |
195847fa | 2853 | x = SCM_ENTITY_PROCEDURE (proc); |
f3d2630a MD |
2854 | #ifdef DEVAL |
2855 | arg2 = debug.info->a.args; | |
2856 | #else | |
2857 | arg2 = scm_cons (t.arg1, SCM_EOL); | |
2858 | #endif | |
f3d2630a MD |
2859 | goto type_dispatch; |
2860 | } | |
2861 | else if (!SCM_I_OPERATORP (proc)) | |
9b07e212 MD |
2862 | goto badfun; |
2863 | else | |
0c32d76c | 2864 | { |
195847fa MD |
2865 | arg2 = t.arg1; |
2866 | t.arg1 = proc; | |
2867 | proc = (SCM_I_ENTITYP (proc) | |
2868 | ? SCM_ENTITY_PROCEDURE (proc) | |
2869 | : SCM_OPERATOR_PROCEDURE (proc)); | |
0c32d76c | 2870 | #ifdef DEVAL |
195847fa MD |
2871 | debug.info->a.args = scm_cons (t.arg1, debug.info->a.args); |
2872 | debug.info->a.proc = proc; | |
0c32d76c | 2873 | #endif |
195847fa MD |
2874 | if (SCM_NIMP (proc)) |
2875 | goto evap2; | |
2876 | else | |
2877 | goto badfun; | |
0c32d76c | 2878 | } |
0f2d19dd JB |
2879 | case scm_tc7_subr_2: |
2880 | case scm_tc7_subr_0: | |
2881 | case scm_tc7_subr_3: | |
2882 | case scm_tc7_lsubr_2: | |
2883 | goto wrongnumargs; | |
2884 | default: | |
2885 | goto badfun; | |
2886 | } | |
2887 | } | |
cf7c17e9 | 2888 | #ifdef SCM_CAUTIOUS |
0f2d19dd JB |
2889 | if (SCM_IMP (x)) |
2890 | goto wrongnumargs; | |
680ed4a8 MD |
2891 | else if (SCM_CONSP (x)) |
2892 | { | |
2893 | if (SCM_IMP (SCM_CAR (x))) | |
6cb702da | 2894 | arg2 = SCM_EVALIM (SCM_CAR (x), env); |
680ed4a8 MD |
2895 | else |
2896 | arg2 = EVALCELLCAR (x, env); | |
2897 | } | |
3201d763 | 2898 | else if (SCM_TYP3 (x) == scm_tc3_cons_gloc) |
680ed4a8 | 2899 | { |
3201d763 DH |
2900 | scm_bits_t vcell = SCM_STRUCT_VTABLE_DATA (x) [scm_vtable_index_vcell]; |
2901 | if (vcell == 0) | |
680ed4a8 | 2902 | arg2 = SCM_CAR (x); /* struct planted in code */ |
3201d763 DH |
2903 | else |
2904 | arg2 = SCM_PACK (vcell); | |
680ed4a8 MD |
2905 | } |
2906 | else | |
2907 | goto wrongnumargs; | |
2908 | #else | |
2909 | arg2 = EVALCAR (x, env); | |
0f2d19dd JB |
2910 | #endif |
2911 | { /* have two or more arguments */ | |
6dbd0af5 MD |
2912 | #ifdef DEVAL |
2913 | debug.info->a.args = scm_cons2 (t.arg1, arg2, SCM_EOL); | |
2914 | #endif | |
0f2d19dd JB |
2915 | x = SCM_CDR (x); |
2916 | if (SCM_NULLP (x)) { | |
6dbd0af5 | 2917 | ENTER_APPLY; |
0f2d19dd | 2918 | evap2: |
6dbd0af5 MD |
2919 | switch (SCM_TYP7 (proc)) |
2920 | { /* have two arguments */ | |
2921 | case scm_tc7_subr_2: | |
2922 | case scm_tc7_subr_2o: | |
2923 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2)); | |
2924 | case scm_tc7_lsubr: | |
0f2d19dd | 2925 | #ifdef DEVAL |
6dbd0af5 MD |
2926 | RETURN (SCM_SUBRF (proc) (debug.info->a.args)) |
2927 | #else | |
2928 | RETURN (SCM_SUBRF (proc) (scm_cons2 (t.arg1, arg2, SCM_EOL))); | |
0f2d19dd | 2929 | #endif |
6dbd0af5 MD |
2930 | case scm_tc7_lsubr_2: |
2931 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, SCM_EOL)); | |
2932 | case scm_tc7_rpsubr: | |
2933 | case scm_tc7_asubr: | |
2934 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2)); | |
0717dfd8 | 2935 | case scm_tc7_smob: |
68b06924 | 2936 | if (!SCM_SMOB_APPLICABLE_P (proc)) |
0717dfd8 | 2937 | goto badfun; |
68b06924 | 2938 | RETURN (SCM_SMOB_APPLY_2 (proc, t.arg1, arg2)); |
6dbd0af5 MD |
2939 | cclon: |
2940 | case scm_tc7_cclo: | |
0f2d19dd | 2941 | #ifdef DEVAL |
195847fa MD |
2942 | RETURN (SCM_APPLY (SCM_CCLO_SUBR (proc), |
2943 | scm_cons (proc, debug.info->a.args), | |
2944 | SCM_EOL)); | |
0f2d19dd | 2945 | #else |
195847fa MD |
2946 | RETURN (SCM_APPLY (SCM_CCLO_SUBR (proc), |
2947 | scm_cons2 (proc, t.arg1, | |
2948 | scm_cons (arg2, | |
2949 | scm_eval_args (x, | |
2950 | env, | |
2951 | proc))), | |
2952 | SCM_EOL)); | |
6dbd0af5 | 2953 | #endif |
0c32d76c | 2954 | case scm_tcs_cons_gloc: |
f3d2630a MD |
2955 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) |
2956 | { | |
195847fa | 2957 | x = SCM_ENTITY_PROCEDURE (proc); |
f3d2630a MD |
2958 | #ifdef DEVAL |
2959 | arg2 = debug.info->a.args; | |
2960 | #else | |
2961 | arg2 = scm_cons2 (t.arg1, arg2, SCM_EOL); | |
2962 | #endif | |
f3d2630a MD |
2963 | goto type_dispatch; |
2964 | } | |
2965 | else if (!SCM_I_OPERATORP (proc)) | |
9b07e212 MD |
2966 | goto badfun; |
2967 | else | |
0c32d76c | 2968 | { |
195847fa | 2969 | operatorn: |
0c32d76c | 2970 | #ifdef DEVAL |
195847fa MD |
2971 | RETURN (SCM_APPLY (SCM_I_ENTITYP (proc) |
2972 | ? SCM_ENTITY_PROCEDURE (proc) | |
2973 | : SCM_OPERATOR_PROCEDURE (proc), | |
2974 | scm_cons (proc, debug.info->a.args), | |
2975 | SCM_EOL)); | |
2976 | #else | |
2977 | RETURN (SCM_APPLY (SCM_I_ENTITYP (proc) | |
2978 | ? SCM_ENTITY_PROCEDURE (proc) | |
2979 | : SCM_OPERATOR_PROCEDURE (proc), | |
2980 | scm_cons2 (proc, t.arg1, | |
2981 | scm_cons (arg2, | |
2982 | scm_eval_args (x, | |
2983 | env, | |
2984 | proc))), | |
2985 | SCM_EOL)); | |
2986 | #endif | |
0c32d76c | 2987 | } |
6dbd0af5 MD |
2988 | case scm_tc7_subr_0: |
2989 | case scm_tc7_cxr: | |
2990 | case scm_tc7_subr_1o: | |
2991 | case scm_tc7_subr_1: | |
2992 | case scm_tc7_subr_3: | |
6dbd0af5 MD |
2993 | goto wrongnumargs; |
2994 | default: | |
2995 | goto badfun; | |
002f1a5d MD |
2996 | case scm_tc7_pws: |
2997 | proc = SCM_PROCEDURE (proc); | |
2998 | #ifdef DEVAL | |
2999 | debug.info->a.proc = proc; | |
3000 | #endif | |
3001 | if (!SCM_CLOSUREP (proc)) | |
3002 | goto evap2; | |
3003 | if (scm_badformalsp (proc, 2)) | |
3004 | goto umwrongnumargs; | |
6dbd0af5 | 3005 | case scm_tcs_closures: |
195847fa | 3006 | /* clos2: */ |
0f2d19dd | 3007 | #ifdef DEVAL |
726d810a | 3008 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), |
da7f71d7 MD |
3009 | debug.info->a.args, |
3010 | SCM_ENV (proc)); | |
0f2d19dd | 3011 | #else |
726d810a | 3012 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), |
da7f71d7 | 3013 | scm_cons2 (t.arg1, arg2, SCM_EOL), SCM_ENV (proc)); |
0f2d19dd | 3014 | #endif |
6dbd0af5 | 3015 | x = SCM_CODE (proc); |
5280aaca | 3016 | goto nontoplevel_cdrxbegin; |
6dbd0af5 | 3017 | } |
0f2d19dd | 3018 | } |
cf7c17e9 | 3019 | #ifdef SCM_CAUTIOUS |
680ed4a8 MD |
3020 | if (SCM_IMP (x) || SCM_NECONSP (x)) |
3021 | goto wrongnumargs; | |
3022 | #endif | |
0f2d19dd | 3023 | #ifdef DEVAL |
6dbd0af5 | 3024 | debug.info->a.args = scm_cons2 (t.arg1, arg2, |
680ed4a8 MD |
3025 | scm_deval_args (x, env, proc, |
3026 | SCM_CDRLOC (SCM_CDR (debug.info->a.args)))); | |
0f2d19dd | 3027 | #endif |
6dbd0af5 | 3028 | ENTER_APPLY; |
89efbff4 | 3029 | evap3: |
6dbd0af5 MD |
3030 | switch (SCM_TYP7 (proc)) |
3031 | { /* have 3 or more arguments */ | |
0f2d19dd | 3032 | #ifdef DEVAL |
6dbd0af5 MD |
3033 | case scm_tc7_subr_3: |
3034 | SCM_ASRTGO (SCM_NULLP (SCM_CDR (x)), wrongnumargs); | |
da7f71d7 MD |
3035 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, |
3036 | SCM_CADDR (debug.info->a.args))); | |
6dbd0af5 | 3037 | case scm_tc7_asubr: |
399dedcc MD |
3038 | #ifdef BUILTIN_RPASUBR |
3039 | t.arg1 = SCM_SUBRF(proc)(t.arg1, arg2); | |
3040 | arg2 = SCM_CDR (SCM_CDR (debug.info->a.args)); | |
da7f71d7 MD |
3041 | do |
3042 | { | |
3043 | t.arg1 = SCM_SUBRF(proc)(t.arg1, SCM_CAR (arg2)); | |
3044 | arg2 = SCM_CDR (arg2); | |
3045 | } | |
3046 | while (SCM_NIMP (arg2)); | |
399dedcc MD |
3047 | RETURN (t.arg1) |
3048 | #endif /* BUILTIN_RPASUBR */ | |
6dbd0af5 | 3049 | case scm_tc7_rpsubr: |
71d3aa6d MD |
3050 | #ifdef BUILTIN_RPASUBR |
3051 | if (SCM_FALSEP (SCM_SUBRF (proc) (t.arg1, arg2))) | |
3052 | RETURN (SCM_BOOL_F) | |
3053 | t.arg1 = SCM_CDR (SCM_CDR (debug.info->a.args)); | |
da7f71d7 MD |
3054 | do |
3055 | { | |
3056 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg2, SCM_CAR (t.arg1)))) | |
3057 | RETURN (SCM_BOOL_F) | |
3058 | arg2 = SCM_CAR (t.arg1); | |
3059 | t.arg1 = SCM_CDR (t.arg1); | |
3060 | } | |
3061 | while (SCM_NIMP (t.arg1)); | |
71d3aa6d MD |
3062 | RETURN (SCM_BOOL_T) |
3063 | #else /* BUILTIN_RPASUBR */ | |
da7f71d7 MD |
3064 | RETURN (SCM_APPLY (proc, t.arg1, |
3065 | scm_acons (arg2, | |
3066 | SCM_CDR (SCM_CDR (debug.info->a.args)), | |
3067 | SCM_EOL))) | |
71d3aa6d | 3068 | #endif /* BUILTIN_RPASUBR */ |
399dedcc | 3069 | case scm_tc7_lsubr_2: |
da7f71d7 MD |
3070 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, |
3071 | SCM_CDR (SCM_CDR (debug.info->a.args)))) | |
399dedcc MD |
3072 | case scm_tc7_lsubr: |
3073 | RETURN (SCM_SUBRF (proc) (debug.info->a.args)) | |
0717dfd8 | 3074 | case scm_tc7_smob: |
68b06924 | 3075 | if (!SCM_SMOB_APPLICABLE_P (proc)) |
0717dfd8 | 3076 | goto badfun; |
68b06924 KN |
3077 | RETURN (SCM_SMOB_APPLY_3 (proc, t.arg1, arg2, |
3078 | SCM_CDDR (debug.info->a.args))); | |
6dbd0af5 MD |
3079 | case scm_tc7_cclo: |
3080 | goto cclon; | |
89efbff4 MD |
3081 | case scm_tc7_pws: |
3082 | proc = SCM_PROCEDURE (proc); | |
3083 | debug.info->a.proc = proc; | |
002f1a5d MD |
3084 | if (!SCM_CLOSUREP (proc)) |
3085 | goto evap3; | |
726d810a | 3086 | if (scm_badargsp (SCM_CLOSURE_FORMALS (proc), debug.info->a.args)) |
002f1a5d | 3087 | goto umwrongnumargs; |
6dbd0af5 | 3088 | case scm_tcs_closures: |
b7ff98dd | 3089 | SCM_SET_ARGSREADY (debug); |
726d810a | 3090 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), |
6dbd0af5 MD |
3091 | debug.info->a.args, |
3092 | SCM_ENV (proc)); | |
3093 | x = SCM_CODE (proc); | |
5280aaca | 3094 | goto nontoplevel_cdrxbegin; |
6dbd0af5 MD |
3095 | #else /* DEVAL */ |
3096 | case scm_tc7_subr_3: | |
3097 | SCM_ASRTGO (SCM_NULLP (SCM_CDR (x)), wrongnumargs); | |
3098 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, EVALCAR (x, env))); | |
3099 | case scm_tc7_asubr: | |
399dedcc | 3100 | #ifdef BUILTIN_RPASUBR |
da7f71d7 MD |
3101 | t.arg1 = SCM_SUBRF (proc) (t.arg1, arg2); |
3102 | do | |
3103 | { | |
3104 | t.arg1 = SCM_SUBRF(proc)(t.arg1, EVALCAR(x, env)); | |
3105 | x = SCM_CDR(x); | |
3106 | } | |
3107 | while (SCM_NIMP (x)); | |
399dedcc MD |
3108 | RETURN (t.arg1) |
3109 | #endif /* BUILTIN_RPASUBR */ | |
6dbd0af5 | 3110 | case scm_tc7_rpsubr: |
71d3aa6d MD |
3111 | #ifdef BUILTIN_RPASUBR |
3112 | if (SCM_FALSEP (SCM_SUBRF (proc) (t.arg1, arg2))) | |
3113 | RETURN (SCM_BOOL_F) | |
da7f71d7 MD |
3114 | do |
3115 | { | |
3116 | t.arg1 = EVALCAR (x, env); | |
3117 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg2, t.arg1))) | |
3118 | RETURN (SCM_BOOL_F) | |
3119 | arg2 = t.arg1; | |
3120 | x = SCM_CDR (x); | |
3121 | } | |
3122 | while (SCM_NIMP (x)); | |
71d3aa6d MD |
3123 | RETURN (SCM_BOOL_T) |
3124 | #else /* BUILTIN_RPASUBR */ | |
da7f71d7 | 3125 | RETURN (SCM_APPLY (proc, t.arg1, |
680ed4a8 MD |
3126 | scm_acons (arg2, |
3127 | scm_eval_args (x, env, proc), | |
3128 | SCM_EOL))); | |
71d3aa6d | 3129 | #endif /* BUILTIN_RPASUBR */ |
6dbd0af5 | 3130 | case scm_tc7_lsubr_2: |
680ed4a8 | 3131 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, scm_eval_args (x, env, proc))); |
6dbd0af5 | 3132 | case scm_tc7_lsubr: |
680ed4a8 MD |
3133 | RETURN (SCM_SUBRF (proc) (scm_cons2 (t.arg1, |
3134 | arg2, | |
3135 | scm_eval_args (x, env, proc)))); | |
0717dfd8 | 3136 | case scm_tc7_smob: |
68b06924 | 3137 | if (!SCM_SMOB_APPLICABLE_P (proc)) |
0717dfd8 | 3138 | goto badfun; |
68b06924 KN |
3139 | RETURN (SCM_SMOB_APPLY_3 (proc, t.arg1, arg2, |
3140 | scm_eval_args (x, env, proc))); | |
6dbd0af5 MD |
3141 | case scm_tc7_cclo: |
3142 | goto cclon; | |
89efbff4 MD |
3143 | case scm_tc7_pws: |
3144 | proc = SCM_PROCEDURE (proc); | |
002f1a5d MD |
3145 | if (!SCM_CLOSUREP (proc)) |
3146 | goto evap3; | |
3147 | { | |
726d810a | 3148 | SCM formals = SCM_CLOSURE_FORMALS (proc); |
002f1a5d MD |
3149 | if (SCM_NULLP (formals) |
3150 | || (SCM_CONSP (formals) | |
3151 | && (SCM_NULLP (SCM_CDR (formals)) | |
3152 | || (SCM_CONSP (SCM_CDR (formals)) | |
3153 | && scm_badargsp (SCM_CDDR (formals), x))))) | |
3154 | goto umwrongnumargs; | |
3155 | } | |
6dbd0af5 MD |
3156 | case scm_tcs_closures: |
3157 | #ifdef DEVAL | |
b7ff98dd | 3158 | SCM_SET_ARGSREADY (debug); |
6dbd0af5 | 3159 | #endif |
726d810a | 3160 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), |
680ed4a8 MD |
3161 | scm_cons2 (t.arg1, |
3162 | arg2, | |
3163 | scm_eval_args (x, env, proc)), | |
6dbd0af5 MD |
3164 | SCM_ENV (proc)); |
3165 | x = SCM_CODE (proc); | |
5280aaca | 3166 | goto nontoplevel_cdrxbegin; |
0f2d19dd | 3167 | #endif /* DEVAL */ |
0c32d76c | 3168 | case scm_tcs_cons_gloc: |
f3d2630a MD |
3169 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) |
3170 | { | |
3171 | #ifdef DEVAL | |
3172 | arg2 = debug.info->a.args; | |
3173 | #else | |
3174 | arg2 = scm_cons2 (t.arg1, arg2, scm_eval_args (x, env, proc)); | |
3175 | #endif | |
195847fa | 3176 | x = SCM_ENTITY_PROCEDURE (proc); |
f3d2630a MD |
3177 | goto type_dispatch; |
3178 | } | |
3179 | else if (!SCM_I_OPERATORP (proc)) | |
9b07e212 MD |
3180 | goto badfun; |
3181 | else | |
195847fa | 3182 | goto operatorn; |
6dbd0af5 MD |
3183 | case scm_tc7_subr_2: |
3184 | case scm_tc7_subr_1o: | |
3185 | case scm_tc7_subr_2o: | |
3186 | case scm_tc7_subr_0: | |
3187 | case scm_tc7_cxr: | |
3188 | case scm_tc7_subr_1: | |
6dbd0af5 MD |
3189 | goto wrongnumargs; |
3190 | default: | |
3191 | goto badfun; | |
3192 | } | |
0f2d19dd JB |
3193 | } |
3194 | #ifdef DEVAL | |
6dbd0af5 | 3195 | exit: |
b6d75948 | 3196 | if (CHECK_EXIT && SCM_TRAPS_P) |
b7ff98dd | 3197 | if (SCM_EXIT_FRAME_P || (SCM_TRACE_P && SCM_TRACED_FRAME_P (debug))) |
6dbd0af5 | 3198 | { |
b7ff98dd MD |
3199 | SCM_CLEAR_TRACED_FRAME (debug); |
3200 | if (SCM_CHEAPTRAPS_P) | |
c0ab1b8d | 3201 | t.arg1 = scm_make_debugobj (&debug); |
6dbd0af5 MD |
3202 | else |
3203 | { | |
5f144b10 GH |
3204 | int first; |
3205 | SCM val = scm_make_continuation (&first); | |
3206 | ||
3207 | if (first) | |
3208 | t.arg1 = val; | |
3209 | else | |
6dbd0af5 | 3210 | { |
5f144b10 | 3211 | proc = val; |
6dbd0af5 MD |
3212 | goto ret; |
3213 | } | |
3214 | } | |
2f0d1375 | 3215 | scm_ithrow (scm_sym_exit_frame, scm_cons2 (t.arg1, proc, SCM_EOL), 0); |
6dbd0af5 MD |
3216 | } |
3217 | ret: | |
1646d37b | 3218 | scm_last_debug_frame = debug.prev; |
0f2d19dd JB |
3219 | return proc; |
3220 | #endif | |
3221 | } | |
3222 | ||
6dbd0af5 MD |
3223 | |
3224 | /* SECTION: This code is compiled once. | |
3225 | */ | |
3226 | ||
0f2d19dd JB |
3227 | #ifndef DEVAL |
3228 | ||
82a2622a | 3229 | /* This code processes the arguments to apply: |
b145c172 JB |
3230 | |
3231 | (apply PROC ARG1 ... ARGS) | |
3232 | ||
82a2622a JB |
3233 | Given a list (ARG1 ... ARGS), this function conses the ARG1 |
3234 | ... arguments onto the front of ARGS, and returns the resulting | |
3235 | list. Note that ARGS is a list; thus, the argument to this | |
3236 | function is a list whose last element is a list. | |
3237 | ||
3238 | Apply calls this function, and applies PROC to the elements of the | |
b145c172 JB |
3239 | result. apply:nconc2last takes care of building the list of |
3240 | arguments, given (ARG1 ... ARGS). | |
3241 | ||
82a2622a JB |
3242 | Rather than do new consing, apply:nconc2last destroys its argument. |
3243 | On that topic, this code came into my care with the following | |
3244 | beautifully cryptic comment on that topic: "This will only screw | |
3245 | you if you do (scm_apply scm_apply '( ... ))" If you know what | |
3246 | they're referring to, send me a patch to this comment. */ | |
b145c172 | 3247 | |
3b3b36dd | 3248 | SCM_DEFINE (scm_nconc2last, "apply:nconc2last", 1, 0, 0, |
b3f26b14 MG |
3249 | (SCM lst), |
3250 | "Given a list (@var{arg1} @dots{} @var{args}), this function\n" | |
3251 | "conses the @var{arg1} @dots{} arguments onto the front of\n" | |
3252 | "@var{args}, and returns the resulting list. Note that\n" | |
3253 | "@var{args} is a list; thus, the argument to this function is\n" | |
3254 | "a list whose last element is a list.\n" | |
3255 | "Note: Rather than do new consing, @code{apply:nconc2last}\n" | |
3256 | "destroys its argument, so use with care.") | |
1bbd0b84 | 3257 | #define FUNC_NAME s_scm_nconc2last |
0f2d19dd JB |
3258 | { |
3259 | SCM *lloc; | |
c1bfcf60 | 3260 | SCM_VALIDATE_NONEMPTYLIST (1,lst); |
0f2d19dd JB |
3261 | lloc = &lst; |
3262 | while (SCM_NNULLP (SCM_CDR (*lloc))) | |
a23afe53 | 3263 | lloc = SCM_CDRLOC (*lloc); |
1bbd0b84 | 3264 | SCM_ASSERT (scm_ilength (SCM_CAR (*lloc)) >= 0, lst, SCM_ARG1, FUNC_NAME); |
0f2d19dd JB |
3265 | *lloc = SCM_CAR (*lloc); |
3266 | return lst; | |
3267 | } | |
1bbd0b84 | 3268 | #undef FUNC_NAME |
0f2d19dd JB |
3269 | |
3270 | #endif /* !DEVAL */ | |
3271 | ||
6dbd0af5 MD |
3272 | |
3273 | /* SECTION: When DEVAL is defined this code yields scm_dapply. | |
3274 | * It is compiled twice. | |
3275 | */ | |
3276 | ||
0f2d19dd | 3277 | #if 0 |
1cc91f1b | 3278 | |
0f2d19dd | 3279 | SCM |
6e8d25a6 | 3280 | scm_apply (SCM proc, SCM arg1, SCM args) |
0f2d19dd JB |
3281 | {} |
3282 | #endif | |
3283 | ||
3284 | #if 0 | |
1cc91f1b | 3285 | |
0f2d19dd | 3286 | SCM |
6e8d25a6 GB |
3287 | scm_dapply (SCM proc, SCM arg1, SCM args) |
3288 | { /* empty */ } | |
0f2d19dd JB |
3289 | #endif |
3290 | ||
1cc91f1b | 3291 | |
82a2622a JB |
3292 | /* Apply a function to a list of arguments. |
3293 | ||
3294 | This function is exported to the Scheme level as taking two | |
3295 | required arguments and a tail argument, as if it were: | |
3296 | (lambda (proc arg1 . args) ...) | |
3297 | Thus, if you just have a list of arguments to pass to a procedure, | |
3298 | pass the list as ARG1, and '() for ARGS. If you have some fixed | |
3299 | args, pass the first as ARG1, then cons any remaining fixed args | |
3300 | onto the front of your argument list, and pass that as ARGS. */ | |
3301 | ||
0f2d19dd | 3302 | SCM |
1bbd0b84 | 3303 | SCM_APPLY (SCM proc, SCM arg1, SCM args) |
0f2d19dd JB |
3304 | { |
3305 | #ifdef DEBUG_EXTENSIONS | |
3306 | #ifdef DEVAL | |
6dbd0af5 | 3307 | scm_debug_frame debug; |
c0ab1b8d | 3308 | scm_debug_info debug_vect_body; |
1646d37b | 3309 | debug.prev = scm_last_debug_frame; |
b7ff98dd | 3310 | debug.status = SCM_APPLYFRAME; |
c0ab1b8d | 3311 | debug.vect = &debug_vect_body; |
6dbd0af5 MD |
3312 | debug.vect[0].a.proc = proc; |
3313 | debug.vect[0].a.args = SCM_EOL; | |
1646d37b | 3314 | scm_last_debug_frame = &debug; |
0f2d19dd | 3315 | #else |
b7ff98dd | 3316 | if (SCM_DEBUGGINGP) |
0f2d19dd JB |
3317 | return scm_dapply (proc, arg1, args); |
3318 | #endif | |
3319 | #endif | |
3320 | ||
3321 | SCM_ASRTGO (SCM_NIMP (proc), badproc); | |
82a2622a JB |
3322 | |
3323 | /* If ARGS is the empty list, then we're calling apply with only two | |
3324 | arguments --- ARG1 is the list of arguments for PROC. Whatever | |
3325 | the case, futz with things so that ARG1 is the first argument to | |
3326 | give to PROC (or SCM_UNDEFINED if no args), and ARGS contains the | |
30000774 JB |
3327 | rest. |
3328 | ||
3329 | Setting the debug apply frame args this way is pretty messy. | |
3330 | Perhaps we should store arg1 and args directly in the frame as | |
3331 | received, and let scm_frame_arguments unpack them, because that's | |
3332 | a relatively rare operation. This works for now; if the Guile | |
3333 | developer archives are still around, see Mikael's post of | |
3334 | 11-Apr-97. */ | |
0f2d19dd JB |
3335 | if (SCM_NULLP (args)) |
3336 | { | |
3337 | if (SCM_NULLP (arg1)) | |
30000774 JB |
3338 | { |
3339 | arg1 = SCM_UNDEFINED; | |
3340 | #ifdef DEVAL | |
3341 | debug.vect[0].a.args = SCM_EOL; | |
3342 | #endif | |
3343 | } | |
0f2d19dd JB |
3344 | else |
3345 | { | |
30000774 JB |
3346 | #ifdef DEVAL |
3347 | debug.vect[0].a.args = arg1; | |
3348 | #endif | |
0f2d19dd JB |
3349 | args = SCM_CDR (arg1); |
3350 | arg1 = SCM_CAR (arg1); | |
3351 | } | |
3352 | } | |
3353 | else | |
3354 | { | |
0f2d19dd | 3355 | args = scm_nconc2last (args); |
30000774 JB |
3356 | #ifdef DEVAL |
3357 | debug.vect[0].a.args = scm_cons (arg1, args); | |
3358 | #endif | |
0f2d19dd | 3359 | } |
0f2d19dd | 3360 | #ifdef DEVAL |
b6d75948 | 3361 | if (SCM_ENTER_FRAME_P && SCM_TRAPS_P) |
6dbd0af5 MD |
3362 | { |
3363 | SCM tmp; | |
b7ff98dd | 3364 | if (SCM_CHEAPTRAPS_P) |
c0ab1b8d | 3365 | tmp = scm_make_debugobj (&debug); |
6dbd0af5 MD |
3366 | else |
3367 | { | |
5f144b10 GH |
3368 | int first; |
3369 | ||
3370 | tmp = scm_make_continuation (&first); | |
3371 | if (!first) | |
6dbd0af5 MD |
3372 | goto entap; |
3373 | } | |
2f0d1375 | 3374 | scm_ithrow (scm_sym_enter_frame, scm_cons (tmp, SCM_EOL), 0); |
6dbd0af5 MD |
3375 | } |
3376 | entap: | |
3377 | ENTER_APPLY; | |
3378 | #endif | |
6dbd0af5 | 3379 | tail: |
0f2d19dd JB |
3380 | switch (SCM_TYP7 (proc)) |
3381 | { | |
3382 | case scm_tc7_subr_2o: | |
3383 | args = SCM_NULLP (args) ? SCM_UNDEFINED : SCM_CAR (args); | |
3384 | RETURN (SCM_SUBRF (proc) (arg1, args)) | |
3385 | case scm_tc7_subr_2: | |
269861c7 MD |
3386 | SCM_ASRTGO (SCM_NNULLP (args) && SCM_NULLP (SCM_CDR (args)), |
3387 | wrongnumargs); | |
0f2d19dd JB |
3388 | args = SCM_CAR (args); |
3389 | RETURN (SCM_SUBRF (proc) (arg1, args)) | |
3390 | case scm_tc7_subr_0: | |
3391 | SCM_ASRTGO (SCM_UNBNDP (arg1), wrongnumargs); | |
3392 | RETURN (SCM_SUBRF (proc) ()) | |
3393 | case scm_tc7_subr_1: | |
41ee56dd | 3394 | SCM_ASRTGO (!SCM_UNBNDP (arg1), wrongnumargs); |
0f2d19dd JB |
3395 | case scm_tc7_subr_1o: |
3396 | SCM_ASRTGO (SCM_NULLP (args), wrongnumargs); | |
3397 | RETURN (SCM_SUBRF (proc) (arg1)) | |
3398 | case scm_tc7_cxr: | |
90cd76d9 | 3399 | SCM_ASRTGO (!SCM_UNBNDP (arg1) && SCM_NULLP (args), wrongnumargs); |
0f2d19dd JB |
3400 | if (SCM_SUBRF (proc)) |
3401 | { | |
6dbd0af5 MD |
3402 | if (SCM_INUMP (arg1)) |
3403 | { | |
f8de44c1 | 3404 | RETURN (scm_make_real (SCM_DSUBRF (proc) ((double) SCM_INUM (arg1)))); |
6dbd0af5 | 3405 | } |
0f2d19dd | 3406 | SCM_ASRTGO (SCM_NIMP (arg1), floerr); |
6dbd0af5 MD |
3407 | if (SCM_REALP (arg1)) |
3408 | { | |
eb42e2f0 | 3409 | RETURN (scm_make_real (SCM_DSUBRF (proc) (SCM_REAL_VALUE (arg1)))); |
6dbd0af5 | 3410 | } |
0f2d19dd | 3411 | #ifdef SCM_BIGDIG |
26d5b9b4 | 3412 | if (SCM_BIGP (arg1)) |
f8de44c1 | 3413 | RETURN (scm_make_real (SCM_DSUBRF (proc) (scm_big2dbl (arg1)))) |
0f2d19dd JB |
3414 | #endif |
3415 | floerr: | |
9de33deb | 3416 | SCM_WTA_DISPATCH_1 (*SCM_SUBR_GENERIC (proc), arg1, |
3db4adfc | 3417 | SCM_ARG1, SCM_SYMBOL_CHARS (SCM_SNAME (proc))); |
0f2d19dd | 3418 | } |
3201d763 | 3419 | proc = SCM_SNAME (proc); |
0f2d19dd | 3420 | { |
b5c2579a | 3421 | char *chrs = SCM_SYMBOL_CHARS (proc) + SCM_SYMBOL_LENGTH (proc) - 1; |
0f2d19dd JB |
3422 | while ('c' != *--chrs) |
3423 | { | |
0c95b57d | 3424 | SCM_ASSERT (SCM_CONSP (arg1), |
3db4adfc | 3425 | arg1, SCM_ARG1, SCM_SYMBOL_CHARS (proc)); |
0f2d19dd JB |
3426 | arg1 = ('a' == *chrs) ? SCM_CAR (arg1) : SCM_CDR (arg1); |
3427 | } | |
3428 | RETURN (arg1) | |
3429 | } | |
3430 | case scm_tc7_subr_3: | |
f1e06a96 MD |
3431 | SCM_ASRTGO (SCM_NNULLP (args) |
3432 | && SCM_NNULLP (SCM_CDR (args)) | |
3433 | && SCM_NULLP (SCM_CDDR (args)), | |
3434 | wrongnumargs); | |
0f2d19dd JB |
3435 | RETURN (SCM_SUBRF (proc) (arg1, SCM_CAR (args), SCM_CAR (SCM_CDR (args)))) |
3436 | case scm_tc7_lsubr: | |
3437 | #ifdef DEVAL | |
6dbd0af5 | 3438 | RETURN (SCM_SUBRF (proc) (SCM_UNBNDP (arg1) ? SCM_EOL : debug.vect[0].a.args)) |
0f2d19dd JB |
3439 | #else |
3440 | RETURN (SCM_SUBRF (proc) (SCM_UNBNDP (arg1) ? SCM_EOL : scm_cons (arg1, args))) | |
3441 | #endif | |
3442 | case scm_tc7_lsubr_2: | |
0c95b57d | 3443 | SCM_ASRTGO (SCM_CONSP (args), wrongnumargs); |
0f2d19dd JB |
3444 | RETURN (SCM_SUBRF (proc) (arg1, SCM_CAR (args), SCM_CDR (args))) |
3445 | case scm_tc7_asubr: | |
3446 | if (SCM_NULLP (args)) | |
3447 | RETURN (SCM_SUBRF (proc) (arg1, SCM_UNDEFINED)) | |
3448 | while (SCM_NIMP (args)) | |
3449 | { | |
3450 | SCM_ASSERT (SCM_CONSP (args), args, SCM_ARG2, "apply"); | |
3451 | arg1 = SCM_SUBRF (proc) (arg1, SCM_CAR (args)); | |
3452 | args = SCM_CDR (args); | |
3453 | } | |
3454 | RETURN (arg1); | |
3455 | case scm_tc7_rpsubr: | |
3456 | if (SCM_NULLP (args)) | |
3457 | RETURN (SCM_BOOL_T); | |
3458 | while (SCM_NIMP (args)) | |
3459 | { | |
3460 | SCM_ASSERT (SCM_CONSP (args), args, SCM_ARG2, "apply"); | |
3461 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg1, SCM_CAR (args)))) | |
3462 | RETURN (SCM_BOOL_F); | |
3463 | arg1 = SCM_CAR (args); | |
3464 | args = SCM_CDR (args); | |
3465 | } | |
3466 | RETURN (SCM_BOOL_T); | |
3467 | case scm_tcs_closures: | |
3468 | #ifdef DEVAL | |
6dbd0af5 | 3469 | arg1 = (SCM_UNBNDP (arg1) ? SCM_EOL : debug.vect[0].a.args); |
0f2d19dd JB |
3470 | #else |
3471 | arg1 = (SCM_UNBNDP (arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
3472 | #endif | |
cf7c17e9 | 3473 | #ifndef SCM_RECKLESS |
726d810a | 3474 | if (scm_badargsp (SCM_CLOSURE_FORMALS (proc), arg1)) |
0f2d19dd JB |
3475 | goto wrongnumargs; |
3476 | #endif | |
1609038c MD |
3477 | |
3478 | /* Copy argument list */ | |
3479 | if (SCM_IMP (arg1)) | |
3480 | args = arg1; | |
3481 | else | |
3482 | { | |
3483 | SCM tl = args = scm_cons (SCM_CAR (arg1), SCM_UNSPECIFIED); | |
cabe682c | 3484 | while (arg1 = SCM_CDR (arg1), SCM_CONSP (arg1)) |
1609038c MD |
3485 | { |
3486 | SCM_SETCDR (tl, scm_cons (SCM_CAR (arg1), | |
3487 | SCM_UNSPECIFIED)); | |
3488 | tl = SCM_CDR (tl); | |
3489 | } | |
3490 | SCM_SETCDR (tl, arg1); | |
3491 | } | |
3492 | ||
726d810a | 3493 | args = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), args, SCM_ENV (proc)); |
2ddb0920 | 3494 | proc = SCM_CDR (SCM_CODE (proc)); |
e791c18f MD |
3495 | again: |
3496 | arg1 = proc; | |
3497 | while (SCM_NNULLP (arg1 = SCM_CDR (arg1))) | |
2ddb0920 MD |
3498 | { |
3499 | if (SCM_IMP (SCM_CAR (proc))) | |
3500 | { | |
3501 | if (SCM_ISYMP (SCM_CAR (proc))) | |
3502 | { | |
3503 | proc = scm_m_expand_body (proc, args); | |
e791c18f | 3504 | goto again; |
2ddb0920 | 3505 | } |
5280aaca MV |
3506 | else |
3507 | SCM_EVALIM2 (SCM_CAR (proc)); | |
2ddb0920 MD |
3508 | } |
3509 | else | |
e791c18f MD |
3510 | SCM_CEVAL (SCM_CAR (proc), args); |
3511 | proc = arg1; | |
2ddb0920 | 3512 | } |
e791c18f | 3513 | RETURN (EVALCAR (proc, args)); |
0717dfd8 | 3514 | case scm_tc7_smob: |
68b06924 | 3515 | if (!SCM_SMOB_APPLICABLE_P (proc)) |
0717dfd8 | 3516 | goto badproc; |
afa38f6e | 3517 | if (SCM_UNBNDP (arg1)) |
68b06924 | 3518 | RETURN (SCM_SMOB_APPLY_0 (proc)) |
afa38f6e | 3519 | else if (SCM_NULLP (args)) |
68b06924 | 3520 | RETURN (SCM_SMOB_APPLY_1 (proc, arg1)) |
0717dfd8 | 3521 | else if (SCM_NULLP (SCM_CDR (args))) |
68b06924 | 3522 | RETURN (SCM_SMOB_APPLY_2 (proc, arg1, SCM_CAR (args))) |
0717dfd8 | 3523 | else |
68b06924 | 3524 | RETURN (SCM_SMOB_APPLY_3 (proc, arg1, SCM_CAR (args), SCM_CDR (args))); |
0f2d19dd JB |
3525 | case scm_tc7_cclo: |
3526 | #ifdef DEVAL | |
6dbd0af5 MD |
3527 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : debug.vect[0].a.args); |
3528 | arg1 = proc; | |
3529 | proc = SCM_CCLO_SUBR (proc); | |
3530 | debug.vect[0].a.proc = proc; | |
3531 | debug.vect[0].a.args = scm_cons (arg1, args); | |
0f2d19dd JB |
3532 | #else |
3533 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
0f2d19dd JB |
3534 | arg1 = proc; |
3535 | proc = SCM_CCLO_SUBR (proc); | |
6dbd0af5 | 3536 | #endif |
0f2d19dd | 3537 | goto tail; |
89efbff4 MD |
3538 | case scm_tc7_pws: |
3539 | proc = SCM_PROCEDURE (proc); | |
3540 | #ifdef DEVAL | |
3541 | debug.vect[0].a.proc = proc; | |
3542 | #endif | |
3543 | goto tail; | |
0c32d76c | 3544 | case scm_tcs_cons_gloc: |
f3d2630a MD |
3545 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) |
3546 | { | |
3547 | #ifdef DEVAL | |
3548 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : debug.vect[0].a.args); | |
3549 | #else | |
3550 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
3551 | #endif | |
195847fa | 3552 | RETURN (scm_apply_generic (proc, args)); |
f3d2630a MD |
3553 | } |
3554 | else if (!SCM_I_OPERATORP (proc)) | |
9b07e212 MD |
3555 | goto badproc; |
3556 | else | |
da7f71d7 MD |
3557 | { |
3558 | #ifdef DEVAL | |
3559 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : debug.vect[0].a.args); | |
3560 | #else | |
3561 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
3562 | #endif | |
3563 | arg1 = proc; | |
195847fa MD |
3564 | proc = (SCM_I_ENTITYP (proc) |
3565 | ? SCM_ENTITY_PROCEDURE (proc) | |
3566 | : SCM_OPERATOR_PROCEDURE (proc)); | |
da7f71d7 MD |
3567 | #ifdef DEVAL |
3568 | debug.vect[0].a.proc = proc; | |
3569 | debug.vect[0].a.args = scm_cons (arg1, args); | |
3570 | #endif | |
195847fa MD |
3571 | if (SCM_NIMP (proc)) |
3572 | goto tail; | |
3573 | else | |
3574 | goto badproc; | |
da7f71d7 | 3575 | } |
0f2d19dd | 3576 | wrongnumargs: |
f5bf2977 | 3577 | scm_wrong_num_args (proc); |
0f2d19dd JB |
3578 | default: |
3579 | badproc: | |
db4b4ca6 | 3580 | scm_wrong_type_arg ("apply", SCM_ARG1, proc); |
0f2d19dd JB |
3581 | RETURN (arg1); |
3582 | } | |
3583 | #ifdef DEVAL | |
6dbd0af5 | 3584 | exit: |
b6d75948 | 3585 | if (CHECK_EXIT && SCM_TRAPS_P) |
b7ff98dd | 3586 | if (SCM_EXIT_FRAME_P || (SCM_TRACE_P && SCM_TRACED_FRAME_P (debug))) |
6dbd0af5 | 3587 | { |
b7ff98dd MD |
3588 | SCM_CLEAR_TRACED_FRAME (debug); |
3589 | if (SCM_CHEAPTRAPS_P) | |
c0ab1b8d | 3590 | arg1 = scm_make_debugobj (&debug); |
6dbd0af5 MD |
3591 | else |
3592 | { | |
5f144b10 GH |
3593 | int first; |
3594 | SCM val = scm_make_continuation (&first); | |
3595 | ||
3596 | if (first) | |
3597 | arg1 = val; | |
3598 | else | |
6dbd0af5 | 3599 | { |
5f144b10 | 3600 | proc = val; |
6dbd0af5 MD |
3601 | goto ret; |
3602 | } | |
3603 | } | |
2f0d1375 | 3604 | scm_ithrow (scm_sym_exit_frame, scm_cons2 (arg1, proc, SCM_EOL), 0); |
6dbd0af5 MD |
3605 | } |
3606 | ret: | |
1646d37b | 3607 | scm_last_debug_frame = debug.prev; |
0f2d19dd JB |
3608 | return proc; |
3609 | #endif | |
3610 | } | |
3611 | ||
6dbd0af5 MD |
3612 | |
3613 | /* SECTION: The rest of this file is only read once. | |
3614 | */ | |
3615 | ||
0f2d19dd JB |
3616 | #ifndef DEVAL |
3617 | ||
d9c393f5 JB |
3618 | /* Typechecking for multi-argument MAP and FOR-EACH. |
3619 | ||
47c3f06d | 3620 | Verify that each element of the vector ARGV, except for the first, |
d9c393f5 | 3621 | is a proper list whose length is LEN. Attribute errors to WHO, |
47c3f06d | 3622 | and claim that the i'th element of ARGV is WHO's i+2'th argument. */ |
d9c393f5 | 3623 | static inline void |
47c3f06d MD |
3624 | check_map_args (SCM argv, |
3625 | long len, | |
3626 | SCM gf, | |
3627 | SCM proc, | |
3628 | SCM args, | |
3629 | const char *who) | |
d9c393f5 | 3630 | { |
47c3f06d | 3631 | SCM *ve = SCM_VELTS (argv); |
d9c393f5 JB |
3632 | int i; |
3633 | ||
b5c2579a | 3634 | for (i = SCM_VECTOR_LENGTH (argv) - 1; i >= 1; i--) |
d9c393f5 JB |
3635 | { |
3636 | int elt_len = scm_ilength (ve[i]); | |
3637 | ||
3638 | if (elt_len < 0) | |
47c3f06d MD |
3639 | { |
3640 | if (gf) | |
3641 | scm_apply_generic (gf, scm_cons (proc, args)); | |
3642 | else | |
3643 | scm_wrong_type_arg (who, i + 2, ve[i]); | |
3644 | } | |
d9c393f5 JB |
3645 | |
3646 | if (elt_len != len) | |
3647 | scm_out_of_range (who, ve[i]); | |
3648 | } | |
3649 | ||
5d2b97cd | 3650 | scm_remember_upto_here_1 (argv); |
d9c393f5 JB |
3651 | } |
3652 | ||
3653 | ||
47c3f06d | 3654 | SCM_GPROC (s_map, "map", 2, 0, 1, scm_map, g_map); |
1cc91f1b | 3655 | |
368bf056 MD |
3656 | /* Note: Currently, scm_map applies PROC to the argument list(s) |
3657 | sequentially, starting with the first element(s). This is used in | |
8878f040 | 3658 | evalext.c where the Scheme procedure `map-in-order', which guarantees |
368bf056 | 3659 | sequential behaviour, is implemented using scm_map. If the |
8878f040 | 3660 | behaviour changes, we need to update `map-in-order'. |
368bf056 MD |
3661 | */ |
3662 | ||
0f2d19dd | 3663 | SCM |
1bbd0b84 | 3664 | scm_map (SCM proc, SCM arg1, SCM args) |
af45e3b0 | 3665 | #define FUNC_NAME s_map |
0f2d19dd | 3666 | { |
d9c393f5 | 3667 | long i, len; |
0f2d19dd JB |
3668 | SCM res = SCM_EOL; |
3669 | SCM *pres = &res; | |
3670 | SCM *ve = &args; /* Keep args from being optimized away. */ | |
3671 | ||
d9c393f5 | 3672 | len = scm_ilength (arg1); |
47c3f06d MD |
3673 | SCM_GASSERTn (len >= 0, |
3674 | g_map, scm_cons2 (proc, arg1, args), SCM_ARG2, s_map); | |
af45e3b0 | 3675 | SCM_VALIDATE_REST_ARGUMENT (args); |
0f2d19dd JB |
3676 | if (SCM_NULLP (args)) |
3677 | { | |
3678 | while (SCM_NIMP (arg1)) | |
3679 | { | |
47c3f06d MD |
3680 | *pres = scm_cons (scm_apply (proc, SCM_CAR (arg1), scm_listofnull), |
3681 | SCM_EOL); | |
a23afe53 | 3682 | pres = SCM_CDRLOC (*pres); |
0f2d19dd JB |
3683 | arg1 = SCM_CDR (arg1); |
3684 | } | |
3685 | return res; | |
3686 | } | |
47c3f06d | 3687 | args = scm_vector (arg1 = scm_cons (arg1, args)); |
0f2d19dd | 3688 | ve = SCM_VELTS (args); |
cf7c17e9 | 3689 | #ifndef SCM_RECKLESS |
47c3f06d | 3690 | check_map_args (args, len, g_map, proc, arg1, s_map); |
0f2d19dd JB |
3691 | #endif |
3692 | while (1) | |
3693 | { | |
3694 | arg1 = SCM_EOL; | |
b5c2579a | 3695 | for (i = SCM_VECTOR_LENGTH (args) - 1; i >= 0; i--) |
0f2d19dd | 3696 | { |
d9c393f5 JB |
3697 | if (SCM_IMP (ve[i])) |
3698 | return res; | |
0f2d19dd JB |
3699 | arg1 = scm_cons (SCM_CAR (ve[i]), arg1); |
3700 | ve[i] = SCM_CDR (ve[i]); | |
3701 | } | |
3702 | *pres = scm_cons (scm_apply (proc, arg1, SCM_EOL), SCM_EOL); | |
a23afe53 | 3703 | pres = SCM_CDRLOC (*pres); |
0f2d19dd JB |
3704 | } |
3705 | } | |
af45e3b0 | 3706 | #undef FUNC_NAME |
0f2d19dd JB |
3707 | |
3708 | ||
47c3f06d | 3709 | SCM_GPROC (s_for_each, "for-each", 2, 0, 1, scm_for_each, g_for_each); |
1cc91f1b | 3710 | |
0f2d19dd | 3711 | SCM |
1bbd0b84 | 3712 | scm_for_each (SCM proc, SCM arg1, SCM args) |
af45e3b0 | 3713 | #define FUNC_NAME s_for_each |
0f2d19dd JB |
3714 | { |
3715 | SCM *ve = &args; /* Keep args from being optimized away. */ | |
d9c393f5 | 3716 | long i, len; |
d9c393f5 | 3717 | len = scm_ilength (arg1); |
47c3f06d MD |
3718 | SCM_GASSERTn (len >= 0, g_for_each, scm_cons2 (proc, arg1, args), |
3719 | SCM_ARG2, s_for_each); | |
af45e3b0 | 3720 | SCM_VALIDATE_REST_ARGUMENT (args); |
0f2d19dd JB |
3721 | if SCM_NULLP (args) |
3722 | { | |
3723 | while SCM_NIMP (arg1) | |
3724 | { | |
0f2d19dd JB |
3725 | scm_apply (proc, SCM_CAR (arg1), scm_listofnull); |
3726 | arg1 = SCM_CDR (arg1); | |
3727 | } | |
3728 | return SCM_UNSPECIFIED; | |
3729 | } | |
47c3f06d | 3730 | args = scm_vector (arg1 = scm_cons (arg1, args)); |
0f2d19dd | 3731 | ve = SCM_VELTS (args); |
cf7c17e9 | 3732 | #ifndef SCM_RECKLESS |
47c3f06d | 3733 | check_map_args (args, len, g_for_each, proc, arg1, s_for_each); |
0f2d19dd JB |
3734 | #endif |
3735 | while (1) | |
3736 | { | |
3737 | arg1 = SCM_EOL; | |
b5c2579a | 3738 | for (i = SCM_VECTOR_LENGTH (args) - 1; i >= 0; i--) |
0f2d19dd JB |
3739 | { |
3740 | if SCM_IMP | |
3741 | (ve[i]) return SCM_UNSPECIFIED; | |
3742 | arg1 = scm_cons (SCM_CAR (ve[i]), arg1); | |
3743 | ve[i] = SCM_CDR (ve[i]); | |
3744 | } | |
3745 | scm_apply (proc, arg1, SCM_EOL); | |
3746 | } | |
3747 | } | |
af45e3b0 | 3748 | #undef FUNC_NAME |
0f2d19dd | 3749 | |
1cc91f1b | 3750 | |
0f2d19dd | 3751 | SCM |
6e8d25a6 | 3752 | scm_closure (SCM code, SCM env) |
0f2d19dd JB |
3753 | { |
3754 | register SCM z; | |
3755 | SCM_NEWCELL (z); | |
3756 | SCM_SETCODE (z, code); | |
a23afe53 | 3757 | SCM_SETENV (z, env); |
0f2d19dd JB |
3758 | return z; |
3759 | } | |
3760 | ||
3761 | ||
e841c3e0 | 3762 | scm_bits_t scm_tc16_promise; |
1cc91f1b | 3763 | |
0f2d19dd | 3764 | SCM |
6e8d25a6 | 3765 | scm_makprom (SCM code) |
0f2d19dd | 3766 | { |
cf498326 | 3767 | SCM_RETURN_NEWSMOB (scm_tc16_promise, SCM_UNPACK (code)); |
0f2d19dd JB |
3768 | } |
3769 | ||
3770 | ||
1cc91f1b | 3771 | |
0f2d19dd | 3772 | static int |
e841c3e0 | 3773 | promise_print (SCM exp, SCM port, scm_print_state *pstate) |
0f2d19dd | 3774 | { |
19402679 | 3775 | int writingp = SCM_WRITINGP (pstate); |
b7f3516f | 3776 | scm_puts ("#<promise ", port); |
19402679 | 3777 | SCM_SET_WRITINGP (pstate, 1); |
22a52da1 | 3778 | scm_iprin1 (SCM_CELL_WORD_1 (exp), port, pstate); |
19402679 | 3779 | SCM_SET_WRITINGP (pstate, writingp); |
b7f3516f | 3780 | scm_putc ('>', port); |
0f2d19dd JB |
3781 | return !0; |
3782 | } | |
3783 | ||
3784 | ||
3b3b36dd | 3785 | SCM_DEFINE (scm_force, "force", 1, 0, 0, |
67e8151b MG |
3786 | (SCM x), |
3787 | "If the promise @var{x} has not been computed yet, compute and\n" | |
3788 | "return @var{x}, otherwise just return the previously computed\n" | |
3789 | "value.") | |
1bbd0b84 | 3790 | #define FUNC_NAME s_scm_force |
0f2d19dd | 3791 | { |
445f675c DH |
3792 | SCM_VALIDATE_SMOB (1, x, promise); |
3793 | if (!((1L << 16) & SCM_CELL_WORD_0 (x))) | |
0f2d19dd | 3794 | { |
445f675c DH |
3795 | SCM ans = scm_apply (SCM_CELL_OBJECT_1 (x), SCM_EOL, SCM_EOL); |
3796 | if (!((1L << 16) & SCM_CELL_WORD_0 (x))) | |
0f2d19dd JB |
3797 | { |
3798 | SCM_DEFER_INTS; | |
445f675c DH |
3799 | SCM_SET_CELL_OBJECT_1 (x, ans); |
3800 | SCM_SET_CELL_WORD_0 (x, SCM_CELL_WORD_0 (x) | (1L << 16)); | |
0f2d19dd JB |
3801 | SCM_ALLOW_INTS; |
3802 | } | |
3803 | } | |
445f675c | 3804 | return SCM_CELL_OBJECT_1 (x); |
0f2d19dd | 3805 | } |
1bbd0b84 | 3806 | #undef FUNC_NAME |
0f2d19dd | 3807 | |
445f675c | 3808 | |
a1ec6916 | 3809 | SCM_DEFINE (scm_promise_p, "promise?", 1, 0, 0, |
67e8151b | 3810 | (SCM obj), |
b380b885 MD |
3811 | "Return true if @var{obj} is a promise, i.e. a delayed computation\n" |
3812 | "(@pxref{Delayed evaluation,,,r4rs.info,The Revised^4 Report on Scheme}).") | |
1bbd0b84 | 3813 | #define FUNC_NAME s_scm_promise_p |
0f2d19dd | 3814 | { |
67e8151b | 3815 | return SCM_BOOL (SCM_TYP16_PREDICATE (scm_tc16_promise, obj)); |
0f2d19dd | 3816 | } |
1bbd0b84 | 3817 | #undef FUNC_NAME |
0f2d19dd | 3818 | |
445f675c | 3819 | |
a1ec6916 | 3820 | SCM_DEFINE (scm_cons_source, "cons-source", 3, 0, 0, |
1bbd0b84 | 3821 | (SCM xorig, SCM x, SCM y), |
11768c04 NJ |
3822 | "Create and return a new pair whose car and cdr are @var{x} and @var{y}.\n" |
3823 | "Any source properties associated with @var{xorig} are also associated\n" | |
3824 | "with the new pair.") | |
1bbd0b84 | 3825 | #define FUNC_NAME s_scm_cons_source |
26d5b9b4 MD |
3826 | { |
3827 | SCM p, z; | |
3828 | SCM_NEWCELL (z); | |
445f675c DH |
3829 | SCM_SET_CELL_OBJECT_0 (z, x); |
3830 | SCM_SET_CELL_OBJECT_1 (z, y); | |
26d5b9b4 MD |
3831 | /* Copy source properties possibly associated with xorig. */ |
3832 | p = scm_whash_lookup (scm_source_whash, xorig); | |
445f675c | 3833 | if (!SCM_IMP (p)) |
26d5b9b4 MD |
3834 | scm_whash_insert (scm_source_whash, z, p); |
3835 | return z; | |
3836 | } | |
1bbd0b84 | 3837 | #undef FUNC_NAME |
26d5b9b4 | 3838 | |
445f675c | 3839 | |
a1ec6916 | 3840 | SCM_DEFINE (scm_copy_tree, "copy-tree", 1, 0, 0, |
1bbd0b84 | 3841 | (SCM obj), |
b380b885 MD |
3842 | "Recursively copy the data tree that is bound to @var{obj}, and return a\n" |
3843 | "pointer to the new data structure. @code{copy-tree} recurses down the\n" | |
3844 | "contents of both pairs and vectors (since both cons cells and vector\n" | |
3845 | "cells may point to arbitrary objects), and stops recursing when it hits\n" | |
3846 | "any other object.") | |
1bbd0b84 | 3847 | #define FUNC_NAME s_scm_copy_tree |
0f2d19dd JB |
3848 | { |
3849 | SCM ans, tl; | |
26d5b9b4 | 3850 | if (SCM_IMP (obj)) |
ff467021 | 3851 | return obj; |
3910272e MD |
3852 | if (SCM_VECTORP (obj)) |
3853 | { | |
b5c2579a | 3854 | scm_sizet i = SCM_VECTOR_LENGTH (obj); |
00ffa0e7 | 3855 | ans = scm_c_make_vector (i, SCM_UNSPECIFIED); |
3910272e MD |
3856 | while (i--) |
3857 | SCM_VELTS (ans)[i] = scm_copy_tree (SCM_VELTS (obj)[i]); | |
3858 | return ans; | |
3859 | } | |
ff467021 | 3860 | if (SCM_NCONSP (obj)) |
0f2d19dd | 3861 | return obj; |
26d5b9b4 MD |
3862 | ans = tl = scm_cons_source (obj, |
3863 | scm_copy_tree (SCM_CAR (obj)), | |
3864 | SCM_UNSPECIFIED); | |
cabe682c | 3865 | while (obj = SCM_CDR (obj), SCM_CONSP (obj)) |
a23afe53 MD |
3866 | { |
3867 | SCM_SETCDR (tl, scm_cons (scm_copy_tree (SCM_CAR (obj)), | |
3868 | SCM_UNSPECIFIED)); | |
3869 | tl = SCM_CDR (tl); | |
3870 | } | |
3871 | SCM_SETCDR (tl, obj); | |
0f2d19dd JB |
3872 | return ans; |
3873 | } | |
1bbd0b84 | 3874 | #undef FUNC_NAME |
0f2d19dd | 3875 | |
1cc91f1b | 3876 | |
4163eb72 MV |
3877 | /* We have three levels of EVAL here: |
3878 | ||
3879 | - scm_i_eval (exp, env) | |
3880 | ||
3881 | evaluates EXP in environment ENV. ENV is a lexical environment | |
3882 | structure as used by the actual tree code evaluator. When ENV is | |
3883 | a top-level environment, then changes to the current module are | |
a513ead3 | 3884 | tracked by updating ENV so that it continues to be in sync with |
4163eb72 MV |
3885 | the current module. |
3886 | ||
3887 | - scm_primitive_eval (exp) | |
3888 | ||
3889 | evaluates EXP in the top-level environment as determined by the | |
3890 | current module. This is done by constructing a suitable | |
3891 | environment and calling scm_i_eval. Thus, changes to the | |
3892 | top-level module are tracked normally. | |
3893 | ||
3894 | - scm_eval (exp, mod) | |
3895 | ||
a513ead3 | 3896 | evaluates EXP while MOD is the current module. This is done by |
4163eb72 MV |
3897 | setting the current module to MOD, invoking scm_primitive_eval on |
3898 | EXP, and then restoring the current module to the value it had | |
3899 | previously. That is, while EXP is evaluated, changes to the | |
3900 | current module are tracked, but these changes do not persist when | |
3901 | scm_eval returns. | |
3902 | ||
3903 | For each level of evals, there are two variants, distinguished by a | |
3904 | _x suffix: the ordinary variant does not modify EXP while the _x | |
3905 | variant can destructively modify EXP into something completely | |
3906 | unintelligible. A Scheme data structure passed as EXP to one of the | |
3907 | _x variants should not ever be used again for anything. So when in | |
3908 | doubt, use the ordinary variant. | |
3909 | ||
3910 | */ | |
3911 | ||
68d8be66 MD |
3912 | SCM scm_system_transformer; |
3913 | ||
0f2d19dd | 3914 | SCM |
68d8be66 | 3915 | scm_i_eval_x (SCM exp, SCM env) |
0f2d19dd | 3916 | { |
68d8be66 | 3917 | return SCM_XEVAL (exp, env); |
0f2d19dd JB |
3918 | } |
3919 | ||
68d8be66 MD |
3920 | SCM |
3921 | scm_i_eval (SCM exp, SCM env) | |
3922 | { | |
e37a4fba | 3923 | return SCM_XEVAL (exp, env); |
68d8be66 MD |
3924 | } |
3925 | ||
3926 | SCM | |
4163eb72 | 3927 | scm_primitive_eval_x (SCM exp) |
0f2d19dd | 3928 | { |
a513ead3 MV |
3929 | SCM env; |
3930 | SCM transformer = scm_fluid_ref (SCM_CDR (scm_system_transformer)); | |
3931 | if (SCM_NIMP (transformer)) | |
3932 | exp = scm_apply (transformer, exp, scm_listofnull); | |
3933 | env = scm_top_level_env (scm_current_module_lookup_closure ()); | |
4163eb72 | 3934 | return scm_i_eval_x (exp, env); |
0f2d19dd JB |
3935 | } |
3936 | ||
4163eb72 MV |
3937 | SCM_DEFINE (scm_primitive_eval, "primitive-eval", 1, 0, 0, |
3938 | (SCM exp), | |
2069af38 | 3939 | "Evaluate @var{exp} in the top-level environment specified by\n" |
4163eb72 MV |
3940 | "the current module.") |
3941 | #define FUNC_NAME s_scm_primitive_eval | |
3942 | { | |
a513ead3 MV |
3943 | SCM env; |
3944 | SCM transformer = scm_fluid_ref (SCM_CDR (scm_system_transformer)); | |
3945 | if (SCM_NIMP (transformer)) | |
3946 | exp = scm_apply (transformer, exp, scm_listofnull); | |
3947 | env = scm_top_level_env (scm_current_module_lookup_closure ()); | |
4163eb72 MV |
3948 | return scm_i_eval (exp, env); |
3949 | } | |
3950 | #undef FUNC_NAME | |
3951 | ||
68d8be66 MD |
3952 | /* Eval does not take the second arg optionally. This is intentional |
3953 | * in order to be R5RS compatible, and to prepare for the new module | |
3954 | * system, where we would like to make the choice of evaluation | |
4163eb72 | 3955 | * environment explicit. */ |
549e6ec6 | 3956 | |
09074dbf DH |
3957 | static void |
3958 | change_environment (void *data) | |
3959 | { | |
3960 | SCM pair = SCM_PACK (data); | |
3961 | SCM new_module = SCM_CAR (pair); | |
aa767bc5 | 3962 | SCM old_module = scm_current_module (); |
09074dbf | 3963 | SCM_SETCDR (pair, old_module); |
aa767bc5 | 3964 | scm_set_current_module (new_module); |
09074dbf DH |
3965 | } |
3966 | ||
3967 | ||
09074dbf DH |
3968 | static void |
3969 | restore_environment (void *data) | |
3970 | { | |
3971 | SCM pair = SCM_PACK (data); | |
3972 | SCM old_module = SCM_CDR (pair); | |
aa767bc5 | 3973 | SCM new_module = scm_current_module (); |
2e9c835d | 3974 | SCM_SETCAR (pair, new_module); |
aa767bc5 | 3975 | scm_set_current_module (old_module); |
09074dbf DH |
3976 | } |
3977 | ||
4163eb72 MV |
3978 | static SCM |
3979 | inner_eval_x (void *data) | |
3980 | { | |
3981 | return scm_primitive_eval_x (SCM_PACK(data)); | |
3982 | } | |
3983 | ||
3984 | SCM | |
3985 | scm_eval_x (SCM exp, SCM module) | |
3986 | #define FUNC_NAME "eval!" | |
3987 | { | |
3988 | SCM_VALIDATE_MODULE (2, module); | |
3989 | ||
3990 | return scm_internal_dynamic_wind | |
3991 | (change_environment, inner_eval_x, restore_environment, | |
3992 | (void *) SCM_UNPACK (exp), | |
3993 | (void *) SCM_UNPACK (scm_cons (module, SCM_BOOL_F))); | |
3994 | } | |
3995 | #undef FUNC_NAME | |
3996 | ||
3997 | static SCM | |
3998 | inner_eval (void *data) | |
3999 | { | |
4000 | return scm_primitive_eval (SCM_PACK(data)); | |
4001 | } | |
09074dbf | 4002 | |
68d8be66 | 4003 | SCM_DEFINE (scm_eval, "eval", 2, 0, 0, |
4163eb72 MV |
4004 | (SCM exp, SCM module), |
4005 | "Evaluate @var{exp}, a list representing a Scheme expression,\n" | |
4006 | "in the top-level environment specified by @var{module}.\n" | |
4007 | "While @var{exp} is evaluated (using @var{primitive-eval}),\n" | |
4008 | "@var{module} is made the current module. The current module\n" | |
4009 | "is reset to its previous value when @var{eval} returns.") | |
1bbd0b84 | 4010 | #define FUNC_NAME s_scm_eval |
0f2d19dd | 4011 | { |
4163eb72 | 4012 | SCM_VALIDATE_MODULE (2, module); |
09074dbf DH |
4013 | |
4014 | return scm_internal_dynamic_wind | |
4015 | (change_environment, inner_eval, restore_environment, | |
4163eb72 MV |
4016 | (void *) SCM_UNPACK (exp), |
4017 | (void *) SCM_UNPACK (scm_cons (module, SCM_BOOL_F))); | |
0f2d19dd | 4018 | } |
1bbd0b84 | 4019 | #undef FUNC_NAME |
0f2d19dd | 4020 | |
68d8be66 | 4021 | #if (SCM_DEBUG_DEPRECATED == 0) |
1cc91f1b | 4022 | |
aa767bc5 | 4023 | /* Use scm_current_module () or scm_interaction_environment () |
68d8be66 MD |
4024 | * instead. The former is the module selected during loading of code. |
4025 | * The latter is the module in which the user of this thread currently | |
4026 | * types expressions. | |
4027 | */ | |
4028 | ||
4029 | SCM scm_top_level_lookup_closure_var; | |
4030 | ||
4031 | /* Avoid using this functionality altogether (except for implementing | |
4032 | * libguile, where you can use scm_i_eval or scm_i_eval_x). | |
4033 | * | |
4163eb72 MV |
4034 | * Applications should use either C level scm_eval_x or Scheme |
4035 | * scm_eval; or scm_primitive_eval_x or scm_primitive_eval. */ | |
68d8be66 MD |
4036 | |
4037 | SCM | |
4038 | scm_eval_3 (SCM obj, int copyp, SCM env) | |
4039 | { | |
4040 | if (copyp) | |
4041 | return scm_i_eval (obj, env); | |
4042 | else | |
4043 | return scm_i_eval_x (obj, env); | |
4044 | } | |
4045 | ||
4046 | SCM_DEFINE (scm_eval2, "eval2", 2, 0, 0, | |
4047 | (SCM obj, SCM env_thunk), | |
4163eb72 MV |
4048 | "Evaluate @var{exp}, a Scheme expression, in the environment\n" |
4049 | "designated by @var{lookup}, a symbol-lookup function." | |
4050 | "Do not use this version of eval, it does not play well\n" | |
4051 | "with the module system. Use @code{eval} or\n" | |
4052 | "@code{primitive-eval} instead.") | |
68d8be66 | 4053 | #define FUNC_NAME s_scm_eval2 |
0f2d19dd | 4054 | { |
68d8be66 | 4055 | return scm_i_eval (obj, scm_top_level_env (env_thunk)); |
0f2d19dd | 4056 | } |
68d8be66 MD |
4057 | #undef FUNC_NAME |
4058 | ||
4059 | #endif /* DEPRECATED */ | |
0f2d19dd | 4060 | |
6dbd0af5 MD |
4061 | |
4062 | /* At this point, scm_deval and scm_dapply are generated. | |
4063 | */ | |
4064 | ||
0f2d19dd | 4065 | #ifdef DEBUG_EXTENSIONS |
6dbd0af5 MD |
4066 | # define DEVAL |
4067 | # include "eval.c" | |
0f2d19dd JB |
4068 | #endif |
4069 | ||
4070 | ||
1cc91f1b | 4071 | |
0f2d19dd JB |
4072 | void |
4073 | scm_init_eval () | |
0f2d19dd | 4074 | { |
33b97402 MD |
4075 | scm_init_opts (scm_evaluator_traps, |
4076 | scm_evaluator_trap_table, | |
4077 | SCM_N_EVALUATOR_TRAPS); | |
4078 | scm_init_opts (scm_eval_options_interface, | |
4079 | scm_eval_opts, | |
4080 | SCM_N_EVAL_OPTIONS); | |
4081 | ||
f99c9c28 MD |
4082 | scm_tc16_promise = scm_make_smob_type ("promise", 0); |
4083 | scm_set_smob_mark (scm_tc16_promise, scm_markcdr); | |
e841c3e0 | 4084 | scm_set_smob_print (scm_tc16_promise, promise_print); |
b8229a3b | 4085 | |
81123e6d | 4086 | scm_f_apply = scm_make_subr ("apply", scm_tc7_lsubr_2, scm_apply); |
549e6ec6 MD |
4087 | scm_system_transformer = scm_sysintern ("scm:eval-transformer", |
4088 | scm_make_fluid ()); | |
0f2d19dd | 4089 | |
43a912cf MD |
4090 | scm_lisp_nil = scm_sysintern ("nil", SCM_UNDEFINED); |
4091 | SCM_SETCDR (scm_lisp_nil, SCM_CAR (scm_lisp_nil)); | |
4092 | scm_lisp_nil = SCM_CAR (scm_lisp_nil); | |
4093 | scm_lisp_t = scm_sysintern ("t", SCM_UNDEFINED); | |
4094 | SCM_SETCDR (scm_lisp_t, SCM_CAR (scm_lisp_t)); | |
4095 | scm_lisp_t = SCM_CAR (scm_lisp_t); | |
73b64342 | 4096 | |
0f2d19dd | 4097 | /* acros */ |
0f2d19dd JB |
4098 | /* end of acros */ |
4099 | ||
68d8be66 | 4100 | #if SCM_DEBUG_DEPRECATED == 0 |
dc19d1d2 | 4101 | scm_top_level_lookup_closure_var = |
549e6ec6 | 4102 | scm_sysintern ("*top-level-lookup-closure*", scm_make_fluid ()); |
68d8be66 | 4103 | #endif |
0f2d19dd | 4104 | |
8dc9439f | 4105 | #ifndef SCM_MAGIC_SNARFER |
a0599745 | 4106 | #include "libguile/eval.x" |
8dc9439f | 4107 | #endif |
25eaf21a MD |
4108 | |
4109 | scm_add_feature ("delay"); | |
0f2d19dd | 4110 | } |
0f2d19dd | 4111 | |
6dbd0af5 | 4112 | #endif /* !DEVAL */ |
89e00824 ML |
4113 | |
4114 | /* | |
4115 | Local Variables: | |
4116 | c-file-style: "gnu" | |
4117 | End: | |
4118 | */ |