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f1e06a96 | 1 | /* Copyright (C) 1995, 96, 97, 98, 99, 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" |
a0599745 MD |
103 | |
104 | #include "libguile/validate.h" | |
105 | #include "libguile/eval.h" | |
89efbff4 | 106 | |
0f2d19dd JB |
107 | \f |
108 | ||
6dbd0af5 MD |
109 | /* The evaluator contains a plethora of EVAL symbols. |
110 | * This is an attempt at explanation. | |
111 | * | |
112 | * The following macros should be used in code which is read twice | |
113 | * (where the choice of evaluator is hard soldered): | |
114 | * | |
115 | * SCM_CEVAL is the symbol used within one evaluator to call itself. | |
116 | * Originally, it is defined to scm_ceval, but is redefined to | |
117 | * scm_deval during the second pass. | |
118 | * | |
119 | * SIDEVAL corresponds to SCM_CEVAL, but is used in situations where | |
120 | * only side effects of expressions matter. All immediates are | |
121 | * ignored. | |
122 | * | |
6cb702da | 123 | * SCM_EVALIM is used when it is known that the expression is an |
6dbd0af5 MD |
124 | * immediate. (This macro never calls an evaluator.) |
125 | * | |
126 | * EVALCAR evaluates the car of an expression. | |
127 | * | |
128 | * EVALCELLCAR is like EVALCAR, but is used when it is known that the | |
129 | * car is a lisp cell. | |
130 | * | |
131 | * The following macros should be used in code which is read once | |
132 | * (where the choice of evaluator is dynamic): | |
133 | * | |
6cb702da | 134 | * SCM_XEVAL takes care of immediates without calling an evaluator. It |
6dbd0af5 MD |
135 | * then calls scm_ceval *or* scm_deval, depending on the debugging |
136 | * mode. | |
137 | * | |
6cb702da | 138 | * SCM_XEVALCAR corresponds to EVALCAR, but uses scm_ceval *or* scm_deval |
6dbd0af5 MD |
139 | * depending on the debugging mode. |
140 | * | |
141 | * The main motivation for keeping this plethora is efficiency | |
142 | * together with maintainability (=> locality of code). | |
143 | */ | |
144 | ||
6cb702da | 145 | #define SCM_CEVAL scm_ceval |
7d2b68a8 | 146 | #define SIDEVAL(x, env) if (SCM_NIMP (x)) SCM_CEVAL((x), (env)) |
6cb702da | 147 | |
7d2b68a8 MD |
148 | #define EVALCELLCAR(x, env) (SCM_SYMBOLP (SCM_CAR (x)) \ |
149 | ? *scm_lookupcar (x, env, 1) \ | |
150 | : SCM_CEVAL (SCM_CAR (x), env)) | |
0f2d19dd | 151 | |
7d2b68a8 MD |
152 | #define EVALCAR(x, env) (SCM_NCELLP (SCM_CAR (x)) \ |
153 | ? (SCM_IMP (SCM_CAR (x)) \ | |
154 | ? SCM_EVALIM (SCM_CAR (x), env) \ | |
155 | : SCM_GLOC_VAL (SCM_CAR (x))) \ | |
156 | : EVALCELLCAR (x, env)) | |
0f2d19dd | 157 | |
e2806c10 | 158 | #define EXTEND_ENV SCM_EXTEND_ENV |
0f2d19dd JB |
159 | |
160 | #ifdef MEMOIZE_LOCALS | |
1cc91f1b | 161 | |
0f2d19dd | 162 | SCM * |
6e8d25a6 | 163 | scm_ilookup (SCM iloc, SCM env) |
0f2d19dd JB |
164 | { |
165 | register int ir = SCM_IFRAME (iloc); | |
166 | register SCM er = env; | |
167 | for (; 0 != ir; --ir) | |
168 | er = SCM_CDR (er); | |
169 | er = SCM_CAR (er); | |
170 | for (ir = SCM_IDIST (iloc); 0 != ir; --ir) | |
171 | er = SCM_CDR (er); | |
172 | if (SCM_ICDRP (iloc)) | |
a23afe53 MD |
173 | return SCM_CDRLOC (er); |
174 | return SCM_CARLOC (SCM_CDR (er)); | |
0f2d19dd JB |
175 | } |
176 | #endif | |
177 | ||
f8769b1d MV |
178 | #ifdef USE_THREADS |
179 | ||
180 | /* The Lookup Car Race | |
181 | - by Eva Luator | |
182 | ||
183 | Memoization of variables and special forms is done while executing | |
184 | the code for the first time. As long as there is only one thread | |
185 | everything is fine, but as soon as two threads execute the same | |
186 | code concurrently `for the first time' they can come into conflict. | |
187 | ||
188 | This memoization includes rewriting variable references into more | |
189 | efficient forms and expanding macros. Furthermore, macro expansion | |
190 | includes `compiling' special forms like `let', `cond', etc. into | |
191 | tree-code instructions. | |
192 | ||
193 | There shouldn't normally be a problem with memoizing local and | |
194 | global variable references (into ilocs and glocs), because all | |
195 | threads will mutate the code in *exactly* the same way and (if I | |
196 | read the C code correctly) it is not possible to observe a half-way | |
197 | mutated cons cell. The lookup procedure can handle this | |
198 | transparently without any critical sections. | |
199 | ||
200 | It is different with macro expansion, because macro expansion | |
201 | happens outside of the lookup procedure and can't be | |
202 | undone. Therefore it can't cope with it. It has to indicate | |
203 | failure when it detects a lost race and hope that the caller can | |
204 | handle it. Luckily, it turns out that this is the case. | |
205 | ||
206 | An example to illustrate this: Suppose that the follwing form will | |
207 | be memoized concurrently by two threads | |
208 | ||
209 | (let ((x 12)) x) | |
210 | ||
211 | Let's first examine the lookup of X in the body. The first thread | |
212 | decides that it has to find the symbol "x" in the environment and | |
213 | starts to scan it. Then the other thread takes over and actually | |
214 | overtakes the first. It looks up "x" and substitutes an | |
215 | appropriate iloc for it. Now the first thread continues and | |
216 | completes its lookup. It comes to exactly the same conclusions as | |
217 | the second one and could - without much ado - just overwrite the | |
218 | iloc with the same iloc. | |
219 | ||
220 | But let's see what will happen when the race occurs while looking | |
221 | up the symbol "let" at the start of the form. It could happen that | |
222 | the second thread interrupts the lookup of the first thread and not | |
223 | only substitutes a gloc for it but goes right ahead and replaces it | |
224 | with the compiled form (#@let* (x 12) x). Now, when the first | |
225 | thread completes its lookup, it would replace the #@let* with a | |
226 | gloc pointing to the "let" binding, effectively reverting the form | |
227 | to (let (x 12) x). This is wrong. It has to detect that it has | |
228 | lost the race and the evaluator has to reconsider the changed form | |
229 | completely. | |
230 | ||
231 | This race condition could be resolved with some kind of traffic | |
232 | light (like mutexes) around scm_lookupcar, but I think that it is | |
233 | best to avoid them in this case. They would serialize memoization | |
234 | completely and because lookup involves calling arbitrary Scheme | |
235 | code (via the lookup-thunk), threads could be blocked for an | |
236 | arbitrary amount of time or even deadlock. But with the current | |
237 | solution a lot of unnecessary work is potentially done. */ | |
238 | ||
239 | /* SCM_LOOKUPCAR1 is was SCM_LOOKUPCAR used to be but is allowed to | |
240 | return NULL to indicate a failed lookup due to some race conditions | |
241 | between threads. This only happens when VLOC is the first cell of | |
242 | a special form that will eventually be memoized (like `let', etc.) | |
243 | In that case the whole lookup is bogus and the caller has to | |
244 | reconsider the complete special form. | |
245 | ||
246 | SCM_LOOKUPCAR is still there, of course. It just calls | |
247 | SCM_LOOKUPCAR1 and aborts on recieving NULL. So SCM_LOOKUPCAR | |
248 | should only be called when it is known that VLOC is not the first | |
249 | pair of a special form. Otherwise, use SCM_LOOKUPCAR1 and check | |
26d5b9b4 MD |
250 | for NULL. I think I've found the only places where this |
251 | applies. */ | |
f8769b1d MV |
252 | |
253 | #endif /* USE_THREADS */ | |
1cc91f1b | 254 | |
f25f761d GH |
255 | SCM_SYMBOL (scm_unbound_variable_key, "unbound-variable"); |
256 | ||
d0b7bad7 | 257 | #ifdef USE_THREADS |
8ecf1f13 | 258 | static SCM * |
26d5b9b4 | 259 | scm_lookupcar1 (SCM vloc, SCM genv, int check) |
d0b7bad7 MD |
260 | #else |
261 | SCM * | |
26d5b9b4 | 262 | scm_lookupcar (SCM vloc, SCM genv, int check) |
d0b7bad7 | 263 | #endif |
0f2d19dd JB |
264 | { |
265 | SCM env = genv; | |
e3173f93 JB |
266 | register SCM *al, fl, var = SCM_CAR (vloc); |
267 | #ifdef USE_THREADS | |
268 | register SCM var2 = var; | |
269 | #endif | |
0f2d19dd JB |
270 | #ifdef MEMOIZE_LOCALS |
271 | register SCM iloc = SCM_ILOC00; | |
272 | #endif | |
273 | for (; SCM_NIMP (env); env = SCM_CDR (env)) | |
274 | { | |
790071cd | 275 | if (!SCM_CONSP (SCM_CAR (env))) |
0f2d19dd | 276 | break; |
a23afe53 | 277 | al = SCM_CARLOC (env); |
0f2d19dd JB |
278 | for (fl = SCM_CAR (*al); SCM_NIMP (fl); fl = SCM_CDR (fl)) |
279 | { | |
280 | if (SCM_NCONSP (fl)) | |
33b97402 | 281 | { |
cf498326 | 282 | if (SCM_EQ_P (fl, var)) |
0f2d19dd JB |
283 | { |
284 | #ifdef MEMOIZE_LOCALS | |
f8769b1d | 285 | #ifdef USE_THREADS |
cf498326 | 286 | if (! SCM_EQ_P (SCM_CAR (vloc), var)) |
f8769b1d MV |
287 | goto race; |
288 | #endif | |
3201d763 | 289 | SCM_SET_CELL_WORD_0 (vloc, SCM_UNPACK (iloc) + SCM_ICDR); |
0f2d19dd | 290 | #endif |
a23afe53 | 291 | return SCM_CDRLOC (*al); |
0f2d19dd | 292 | } |
33b97402 MD |
293 | else |
294 | break; | |
295 | } | |
a23afe53 | 296 | al = SCM_CDRLOC (*al); |
cf498326 | 297 | if (SCM_EQ_P (SCM_CAR (fl), var)) |
0f2d19dd JB |
298 | { |
299 | #ifdef MEMOIZE_LOCALS | |
cf7c17e9 | 300 | #ifndef SCM_RECKLESS /* letrec inits to SCM_UNDEFINED */ |
0f2d19dd JB |
301 | if (SCM_UNBNDP (SCM_CAR (*al))) |
302 | { | |
303 | env = SCM_EOL; | |
304 | goto errout; | |
305 | } | |
f8769b1d MV |
306 | #endif |
307 | #ifdef USE_THREADS | |
308 | if (SCM_CAR (vloc) != var) | |
309 | goto race; | |
0f2d19dd | 310 | #endif |
a23afe53 | 311 | SCM_SETCAR (vloc, iloc); |
0f2d19dd | 312 | #endif |
a23afe53 | 313 | return SCM_CARLOC (*al); |
0f2d19dd JB |
314 | } |
315 | #ifdef MEMOIZE_LOCALS | |
3201d763 | 316 | iloc = SCM_PACK (SCM_UNPACK (iloc) + SCM_IDINC); |
0f2d19dd JB |
317 | #endif |
318 | } | |
319 | #ifdef MEMOIZE_LOCALS | |
3201d763 | 320 | iloc = SCM_PACK ((~SCM_IDSTMSK) & (SCM_UNPACK(iloc) + SCM_IFRINC)); |
0f2d19dd JB |
321 | #endif |
322 | } | |
323 | { | |
324 | SCM top_thunk, vcell; | |
790071cd | 325 | if (SCM_NIMP (env)) |
0f2d19dd | 326 | { |
790071cd | 327 | top_thunk = SCM_CAR (env); /* env now refers to a top level env thunk */ |
0f2d19dd JB |
328 | env = SCM_CDR (env); |
329 | } | |
330 | else | |
331 | top_thunk = SCM_BOOL_F; | |
332 | vcell = scm_sym2vcell (var, top_thunk, SCM_BOOL_F); | |
cf498326 | 333 | if (SCM_FALSEP (vcell)) |
0f2d19dd JB |
334 | goto errout; |
335 | else | |
336 | var = vcell; | |
337 | } | |
cf7c17e9 | 338 | #ifndef SCM_RECKLESS |
0f2d19dd JB |
339 | if (SCM_NNULLP (env) || SCM_UNBNDP (SCM_CDR (var))) |
340 | { | |
341 | var = SCM_CAR (var); | |
342 | errout: | |
f5bf2977 | 343 | /* scm_everr (vloc, genv,...) */ |
26d5b9b4 | 344 | if (check) |
f25f761d GH |
345 | { |
346 | if (SCM_NULLP (env)) | |
70d63753 | 347 | scm_error (scm_unbound_variable_key, NULL, "Unbound variable: ~S", |
f25f761d GH |
348 | scm_cons (var, SCM_EOL), SCM_BOOL_F); |
349 | else | |
70d63753 | 350 | scm_misc_error (NULL, "Damaged environment: ~S", |
f25f761d GH |
351 | scm_cons (var, SCM_EOL)); |
352 | } | |
09e4d064 DH |
353 | else { |
354 | /* A variable could not be found, but we shall not throw an error. */ | |
355 | static SCM undef_object = SCM_UNDEFINED; | |
3201d763 | 356 | return &undef_object; |
09e4d064 | 357 | } |
0f2d19dd JB |
358 | } |
359 | #endif | |
f8769b1d MV |
360 | #ifdef USE_THREADS |
361 | if (SCM_CAR (vloc) != var2) | |
362 | { | |
363 | /* Some other thread has changed the very cell we are working | |
364 | on. In effect, it must have done our job or messed it up | |
365 | completely. */ | |
366 | race: | |
367 | var = SCM_CAR (vloc); | |
3201d763 | 368 | if (SCM_ITAG3 (var) == scm_tc3_cons_gloc) |
f8769b1d MV |
369 | return SCM_GLOC_VAL_LOC (var); |
370 | #ifdef MEMOIZE_LOCALS | |
d1ca2c64 | 371 | if (SCM_ITAG7 (var) == SCM_ITAG7 (SCM_ILOC00)) |
f8769b1d MV |
372 | return scm_ilookup (var, genv); |
373 | #endif | |
374 | /* We can't cope with anything else than glocs and ilocs. When | |
375 | a special form has been memoized (i.e. `let' into `#@let') we | |
376 | return NULL and expect the calling function to do the right | |
377 | thing. For the evaluator, this means going back and redoing | |
378 | the dispatch on the car of the form. */ | |
379 | return NULL; | |
380 | } | |
381 | #endif /* USE_THREADS */ | |
382 | ||
3201d763 | 383 | SCM_SET_CELL_WORD_0 (vloc, SCM_UNPACK (var) + scm_tc3_cons_gloc); |
0f2d19dd | 384 | /* Except wait...what if the var is not a vcell, |
f8769b1d | 385 | * but syntax or something.... */ |
a23afe53 | 386 | return SCM_CDRLOC (var); |
0f2d19dd JB |
387 | } |
388 | ||
f8769b1d MV |
389 | #ifdef USE_THREADS |
390 | SCM * | |
6e8d25a6 | 391 | scm_lookupcar (SCM vloc, SCM genv, int check) |
f8769b1d | 392 | { |
26d5b9b4 | 393 | SCM *loc = scm_lookupcar1 (vloc, genv, check); |
f8769b1d MV |
394 | if (loc == NULL) |
395 | abort (); | |
396 | return loc; | |
397 | } | |
f8769b1d MV |
398 | #endif |
399 | ||
0f2d19dd | 400 | #define unmemocar scm_unmemocar |
1cc91f1b | 401 | |
0f2d19dd | 402 | SCM |
6e8d25a6 | 403 | scm_unmemocar (SCM form, SCM env) |
0f2d19dd | 404 | { |
0f2d19dd JB |
405 | SCM c; |
406 | ||
407 | if (SCM_IMP (form)) | |
408 | return form; | |
409 | c = SCM_CAR (form); | |
b0c54567 | 410 | if (SCM_ITAG3 (c) == scm_tc3_cons_gloc) |
a963f787 | 411 | SCM_SETCAR (form, SCM_GLOC_SYM (c)); |
0f2d19dd | 412 | #ifdef MEMOIZE_LOCALS |
6dbd0af5 | 413 | #ifdef DEBUG_EXTENSIONS |
0f2d19dd JB |
414 | else if (SCM_ILOCP (c)) |
415 | { | |
b0c54567 DH |
416 | int ir; |
417 | ||
0f2d19dd JB |
418 | for (ir = SCM_IFRAME (c); ir != 0; --ir) |
419 | env = SCM_CDR (env); | |
420 | env = SCM_CAR (SCM_CAR (env)); | |
421 | for (ir = SCM_IDIST (c); ir != 0; --ir) | |
422 | env = SCM_CDR (env); | |
a23afe53 | 423 | SCM_SETCAR (form, SCM_ICDRP (c) ? env : SCM_CAR (env)); |
0f2d19dd | 424 | } |
6dbd0af5 | 425 | #endif |
0f2d19dd JB |
426 | #endif |
427 | return form; | |
428 | } | |
429 | ||
1cc91f1b | 430 | |
0f2d19dd | 431 | SCM |
6e8d25a6 | 432 | scm_eval_car (SCM pair, SCM env) |
0f2d19dd | 433 | { |
6cb702da | 434 | return SCM_XEVALCAR (pair, env); |
0f2d19dd JB |
435 | } |
436 | ||
437 | \f | |
438 | /* | |
439 | * The following rewrite expressions and | |
440 | * some memoized forms have different syntax | |
441 | */ | |
442 | ||
3eeba8d4 JB |
443 | const char scm_s_expression[] = "missing or extra expression"; |
444 | const char scm_s_test[] = "bad test"; | |
445 | const char scm_s_body[] = "bad body"; | |
446 | const char scm_s_bindings[] = "bad bindings"; | |
185ab0ef | 447 | const char scm_s_duplicate_bindings[] = "duplicate bindings"; |
3eeba8d4 JB |
448 | const char scm_s_variable[] = "bad variable"; |
449 | const char scm_s_clauses[] = "bad or missing clauses"; | |
450 | const char scm_s_formals[] = "bad formals"; | |
5280aaca | 451 | const char scm_s_duplicate_formals[] = "duplicate formals"; |
0f2d19dd | 452 | |
85db4a2c DH |
453 | SCM_GLOBAL_SYMBOL (scm_sym_dot, "."); |
454 | SCM_GLOBAL_SYMBOL (scm_sym_arrow, "=>"); | |
455 | SCM_GLOBAL_SYMBOL (scm_sym_else, "else"); | |
456 | SCM_GLOBAL_SYMBOL (scm_sym_unquote, "unquote"); | |
457 | SCM_GLOBAL_SYMBOL (scm_sym_uq_splicing, "unquote-splicing"); | |
81123e6d MD |
458 | |
459 | SCM scm_f_apply; | |
b8229a3b | 460 | |
6dbd0af5 | 461 | #ifdef DEBUG_EXTENSIONS |
85db4a2c DH |
462 | SCM_GLOBAL_SYMBOL (scm_sym_enter_frame, "enter-frame"); |
463 | SCM_GLOBAL_SYMBOL (scm_sym_apply_frame, "apply-frame"); | |
464 | SCM_GLOBAL_SYMBOL (scm_sym_exit_frame, "exit-frame"); | |
465 | SCM_GLOBAL_SYMBOL (scm_sym_trace, "trace"); | |
6dbd0af5 | 466 | #endif |
0f2d19dd | 467 | |
0f2d19dd | 468 | |
26d5b9b4 MD |
469 | /* Check that the body denoted by XORIG is valid and rewrite it into |
470 | its internal form. The internal form of a body is just the body | |
471 | itself, but prefixed with an ISYM that denotes to what kind of | |
472 | outer construct this body belongs. A lambda body starts with | |
473 | SCM_IM_LAMBDA, for example, a body of a let starts with SCM_IM_LET, | |
474 | etc. The one exception is a body that belongs to a letrec that has | |
475 | been formed by rewriting internal defines: it starts with | |
476 | SCM_IM_DEFINE. */ | |
477 | ||
478 | /* XXX - Besides controlling the rewriting of internal defines, the | |
479 | additional ISYM could be used for improved error messages. | |
480 | This is not done yet. */ | |
481 | ||
482 | static SCM | |
6e8d25a6 | 483 | scm_m_body (SCM op, SCM xorig, const char *what) |
26d5b9b4 | 484 | { |
ab66ae47 | 485 | SCM_ASSYNT (scm_ilength (xorig) >= 1, xorig, scm_s_expression, what); |
26d5b9b4 MD |
486 | |
487 | /* Don't add another ISYM if one is present already. */ | |
488 | if (SCM_ISYMP (SCM_CAR (xorig))) | |
489 | return xorig; | |
490 | ||
491 | /* Retain possible doc string. */ | |
44d3cb0d | 492 | if (!SCM_CONSP (SCM_CAR (xorig))) |
26d5b9b4 MD |
493 | { |
494 | if (SCM_NNULLP (SCM_CDR(xorig))) | |
495 | return scm_cons (SCM_CAR (xorig), | |
496 | scm_m_body (op, SCM_CDR(xorig), what)); | |
497 | return xorig; | |
498 | } | |
499 | ||
ab66ae47 | 500 | return scm_cons (op, xorig); |
26d5b9b4 MD |
501 | } |
502 | ||
b8229a3b | 503 | SCM_SYNTAX(s_quote,"quote", scm_makmmacro, scm_m_quote); |
2f0d1375 | 504 | SCM_GLOBAL_SYMBOL(scm_sym_quote, s_quote); |
1cc91f1b | 505 | |
0f2d19dd | 506 | SCM |
6e8d25a6 | 507 | scm_m_quote (SCM xorig, SCM env) |
0f2d19dd | 508 | { |
26d5b9b4 MD |
509 | SCM x = scm_copy_tree (SCM_CDR (xorig)); |
510 | ||
6cb702da | 511 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, |
b8229a3b | 512 | xorig, 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 | { |
6cb702da | 524 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) >= 1, |
b8229a3b | 525 | xorig, scm_s_expression, s_begin); |
3a3111a8 | 526 | return scm_cons (SCM_IM_BEGIN, SCM_CDR (xorig)); |
0f2d19dd JB |
527 | } |
528 | ||
b8229a3b | 529 | SCM_SYNTAX(s_if, "if", scm_makmmacro, scm_m_if); |
2f0d1375 | 530 | SCM_GLOBAL_SYMBOL(scm_sym_if, s_if); |
1cc91f1b | 531 | |
0f2d19dd | 532 | SCM |
6e8d25a6 | 533 | scm_m_if (SCM xorig, SCM env) |
0f2d19dd JB |
534 | { |
535 | int len = scm_ilength (SCM_CDR (xorig)); | |
6cb702da | 536 | SCM_ASSYNT (len >= 2 && len <= 3, xorig, scm_s_expression, "if"); |
3a3111a8 | 537 | return scm_cons (SCM_IM_IF, SCM_CDR (xorig)); |
0f2d19dd JB |
538 | } |
539 | ||
540 | ||
89efbff4 MD |
541 | /* Will go into the RnRS module when Guile is factorized. |
542 | SCM_SYNTAX(scm_s_set_x,"set!", scm_makmmacro, scm_m_set_x); */ | |
543 | const char scm_s_set_x[] = "set!"; | |
544 | SCM_GLOBAL_SYMBOL(scm_sym_set_x, scm_s_set_x); | |
1cc91f1b | 545 | |
0f2d19dd | 546 | SCM |
6e8d25a6 | 547 | scm_m_set_x (SCM xorig, SCM env) |
0f2d19dd | 548 | { |
6dbd0af5 | 549 | SCM x = SCM_CDR (xorig); |
89efbff4 | 550 | SCM_ASSYNT (2 == scm_ilength (x), xorig, scm_s_expression, scm_s_set_x); |
cabe682c | 551 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (x)), |
89efbff4 | 552 | xorig, scm_s_variable, scm_s_set_x); |
3a3111a8 | 553 | return scm_cons (SCM_IM_SET_X, x); |
0f2d19dd JB |
554 | } |
555 | ||
556 | ||
b8229a3b | 557 | SCM_SYNTAX(s_and, "and", scm_makmmacro, scm_m_and); |
2f0d1375 | 558 | SCM_GLOBAL_SYMBOL(scm_sym_and, s_and); |
1cc91f1b | 559 | |
0f2d19dd | 560 | SCM |
6e8d25a6 | 561 | scm_m_and (SCM xorig, SCM env) |
0f2d19dd JB |
562 | { |
563 | int len = scm_ilength (SCM_CDR (xorig)); | |
b8229a3b | 564 | SCM_ASSYNT (len >= 0, xorig, scm_s_test, s_and); |
0f2d19dd | 565 | if (len >= 1) |
3a3111a8 | 566 | return scm_cons (SCM_IM_AND, SCM_CDR (xorig)); |
0f2d19dd JB |
567 | else |
568 | return SCM_BOOL_T; | |
569 | } | |
570 | ||
b8229a3b | 571 | SCM_SYNTAX(s_or,"or", scm_makmmacro, scm_m_or); |
2f0d1375 | 572 | SCM_GLOBAL_SYMBOL(scm_sym_or,s_or); |
1cc91f1b | 573 | |
0f2d19dd | 574 | SCM |
6e8d25a6 | 575 | scm_m_or (SCM xorig, SCM env) |
0f2d19dd JB |
576 | { |
577 | int len = scm_ilength (SCM_CDR (xorig)); | |
b8229a3b | 578 | SCM_ASSYNT (len >= 0, xorig, scm_s_test, s_or); |
0f2d19dd | 579 | if (len >= 1) |
3a3111a8 | 580 | return scm_cons (SCM_IM_OR, SCM_CDR (xorig)); |
0f2d19dd JB |
581 | else |
582 | return SCM_BOOL_F; | |
583 | } | |
584 | ||
585 | ||
b8229a3b | 586 | SCM_SYNTAX(s_case, "case", scm_makmmacro, scm_m_case); |
2f0d1375 | 587 | SCM_GLOBAL_SYMBOL(scm_sym_case, s_case); |
1cc91f1b | 588 | |
0f2d19dd | 589 | SCM |
6e8d25a6 | 590 | scm_m_case (SCM xorig, SCM env) |
0f2d19dd | 591 | { |
26d5b9b4 | 592 | SCM proc, cdrx = scm_list_copy (SCM_CDR (xorig)), x = cdrx; |
b8229a3b | 593 | SCM_ASSYNT (scm_ilength (x) >= 2, xorig, scm_s_clauses, s_case); |
0f2d19dd JB |
594 | while (SCM_NIMP (x = SCM_CDR (x))) |
595 | { | |
596 | proc = SCM_CAR (x); | |
b8229a3b | 597 | SCM_ASSYNT (scm_ilength (proc) >= 2, xorig, scm_s_clauses, s_case); |
6cb702da | 598 | SCM_ASSYNT (scm_ilength (SCM_CAR (proc)) >= 0 |
4567ed78 DH |
599 | || (SCM_EQ_P (scm_sym_else, SCM_CAR (proc)) |
600 | && SCM_NULLP (SCM_CDR (x))), | |
b8229a3b | 601 | xorig, scm_s_clauses, s_case); |
0f2d19dd | 602 | } |
3a3111a8 | 603 | return scm_cons (SCM_IM_CASE, cdrx); |
0f2d19dd JB |
604 | } |
605 | ||
606 | ||
b8229a3b | 607 | SCM_SYNTAX(s_cond, "cond", scm_makmmacro, scm_m_cond); |
2f0d1375 | 608 | SCM_GLOBAL_SYMBOL(scm_sym_cond, s_cond); |
b8229a3b | 609 | |
1cc91f1b | 610 | |
0f2d19dd | 611 | SCM |
6e8d25a6 | 612 | scm_m_cond (SCM xorig, SCM env) |
0f2d19dd | 613 | { |
26d5b9b4 | 614 | SCM arg1, cdrx = scm_list_copy (SCM_CDR (xorig)), x = cdrx; |
0f2d19dd | 615 | int len = scm_ilength (x); |
b8229a3b | 616 | SCM_ASSYNT (len >= 1, xorig, scm_s_clauses, s_cond); |
0f2d19dd JB |
617 | while (SCM_NIMP (x)) |
618 | { | |
619 | arg1 = SCM_CAR (x); | |
620 | len = scm_ilength (arg1); | |
b8229a3b | 621 | SCM_ASSYNT (len >= 1, xorig, scm_s_clauses, s_cond); |
cf498326 | 622 | if (SCM_EQ_P (scm_sym_else, SCM_CAR (arg1))) |
0f2d19dd | 623 | { |
6cb702da | 624 | SCM_ASSYNT (SCM_NULLP (SCM_CDR (x)) && len >= 2, |
b8229a3b | 625 | xorig, "bad ELSE clause", s_cond); |
a23afe53 | 626 | SCM_SETCAR (arg1, SCM_BOOL_T); |
0f2d19dd | 627 | } |
cf498326 | 628 | if (len >= 2 && SCM_EQ_P (scm_sym_arrow, SCM_CAR (SCM_CDR (arg1)))) |
6cb702da | 629 | SCM_ASSYNT (3 == len && SCM_NIMP (SCM_CAR (SCM_CDR (SCM_CDR (arg1)))), |
b8229a3b | 630 | xorig, "bad recipient", s_cond); |
0f2d19dd JB |
631 | x = SCM_CDR (x); |
632 | } | |
3a3111a8 | 633 | return scm_cons (SCM_IM_COND, cdrx); |
0f2d19dd JB |
634 | } |
635 | ||
b8229a3b | 636 | SCM_SYNTAX(s_lambda, "lambda", scm_makmmacro, scm_m_lambda); |
2f0d1375 | 637 | SCM_GLOBAL_SYMBOL(scm_sym_lambda, s_lambda); |
1cc91f1b | 638 | |
5280aaca MV |
639 | /* Return #t if OBJ is `eq?' to one of the elements of LIST or to the |
640 | cdr of the last cons. (Thus, LIST is not required to be a proper | |
641 | list and when OBJ also found in the improper ending.) */ | |
642 | ||
643 | static int | |
644 | scm_c_improper_memq (SCM obj, SCM list) | |
645 | { | |
646 | for (; SCM_CONSP (list); list = SCM_CDR (list)) | |
647 | { | |
648 | if (SCM_EQ_P (SCM_CAR (list), obj)) | |
649 | return SCM_BOOL_T; | |
650 | } | |
651 | return SCM_EQ_P (list, obj); | |
652 | } | |
653 | ||
0f2d19dd | 654 | SCM |
6e8d25a6 | 655 | scm_m_lambda (SCM xorig, SCM env) |
0f2d19dd JB |
656 | { |
657 | SCM proc, x = SCM_CDR (xorig); | |
26d5b9b4 | 658 | if (scm_ilength (x) < 2) |
0f2d19dd JB |
659 | goto badforms; |
660 | proc = SCM_CAR (x); | |
33b97402 MD |
661 | if (SCM_NULLP (proc)) |
662 | goto memlambda; | |
cf498326 | 663 | if (SCM_EQ_P (SCM_IM_LET, proc)) /* named let */ |
26d5b9b4 | 664 | goto memlambda; |
33b97402 MD |
665 | if (SCM_IMP (proc)) |
666 | goto badforms; | |
667 | if (SCM_SYMBOLP (proc)) | |
668 | goto memlambda; | |
669 | if (SCM_NCONSP (proc)) | |
670 | goto badforms; | |
671 | while (SCM_NIMP (proc)) | |
0f2d19dd | 672 | { |
33b97402 MD |
673 | if (SCM_NCONSP (proc)) |
674 | { | |
0f2d19dd | 675 | if (!SCM_SYMBOLP (proc)) |
33b97402 MD |
676 | goto badforms; |
677 | else | |
678 | goto memlambda; | |
679 | } | |
0c95b57d | 680 | if (!SCM_SYMBOLP (SCM_CAR (proc))) |
0f2d19dd | 681 | goto badforms; |
5280aaca | 682 | else if (scm_c_improper_memq (SCM_CAR(proc), SCM_CDR(proc))) |
db4b4ca6 | 683 | scm_misc_error (s_lambda, scm_s_duplicate_formals, SCM_EOL); |
0f2d19dd JB |
684 | proc = SCM_CDR (proc); |
685 | } | |
ff467021 | 686 | if (SCM_NNULLP (proc)) |
26d5b9b4 MD |
687 | { |
688 | badforms: | |
db4b4ca6 | 689 | scm_misc_error (s_lambda, scm_s_formals, SCM_EOL); |
26d5b9b4 MD |
690 | } |
691 | ||
692 | memlambda: | |
3a3111a8 MD |
693 | return scm_cons2 (SCM_IM_LAMBDA, SCM_CAR (x), |
694 | scm_m_body (SCM_IM_LAMBDA, SCM_CDR (x), s_lambda)); | |
0f2d19dd JB |
695 | } |
696 | ||
b8229a3b | 697 | SCM_SYNTAX(s_letstar,"let*", scm_makmmacro, scm_m_letstar); |
2f0d1375 | 698 | SCM_GLOBAL_SYMBOL(scm_sym_letstar,s_letstar); |
0f2d19dd | 699 | |
1cc91f1b | 700 | |
0f2d19dd | 701 | SCM |
6e8d25a6 | 702 | scm_m_letstar (SCM xorig, SCM env) |
0f2d19dd JB |
703 | { |
704 | SCM x = SCM_CDR (xorig), arg1, proc, vars = SCM_EOL, *varloc = &vars; | |
705 | int len = scm_ilength (x); | |
b8229a3b | 706 | SCM_ASSYNT (len >= 2, xorig, scm_s_body, s_letstar); |
0f2d19dd | 707 | proc = SCM_CAR (x); |
b8229a3b | 708 | SCM_ASSYNT (scm_ilength (proc) >= 0, xorig, scm_s_bindings, s_letstar); |
ff467021 | 709 | while (SCM_NIMP (proc)) |
0f2d19dd JB |
710 | { |
711 | arg1 = SCM_CAR (proc); | |
b8229a3b | 712 | SCM_ASSYNT (2 == scm_ilength (arg1), xorig, scm_s_bindings, s_letstar); |
0c95b57d | 713 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (arg1)), xorig, scm_s_variable, s_letstar); |
0f2d19dd | 714 | *varloc = scm_cons2 (SCM_CAR (arg1), SCM_CAR (SCM_CDR (arg1)), SCM_EOL); |
a23afe53 | 715 | varloc = SCM_CDRLOC (SCM_CDR (*varloc)); |
0f2d19dd JB |
716 | proc = SCM_CDR (proc); |
717 | } | |
718 | x = scm_cons (vars, SCM_CDR (x)); | |
26d5b9b4 | 719 | |
3a3111a8 MD |
720 | return scm_cons2 (SCM_IM_LETSTAR, SCM_CAR (x), |
721 | scm_m_body (SCM_IM_LETSTAR, SCM_CDR (x), s_letstar)); | |
0f2d19dd JB |
722 | } |
723 | ||
724 | /* DO gets the most radically altered syntax | |
725 | (do ((<var1> <init1> <step1>) | |
726 | (<var2> <init2>) | |
727 | ... ) | |
728 | (<test> <return>) | |
729 | <body>) | |
730 | ;; becomes | |
731 | (do_mem (varn ... var2 var1) | |
732 | (<init1> <init2> ... <initn>) | |
733 | (<test> <return>) | |
734 | (<body>) | |
735 | <step1> <step2> ... <stepn>) ;; missing steps replaced by var | |
736 | */ | |
737 | ||
b8229a3b | 738 | SCM_SYNTAX(s_do, "do", scm_makmmacro, scm_m_do); |
2f0d1375 | 739 | SCM_GLOBAL_SYMBOL(scm_sym_do, s_do); |
1cc91f1b | 740 | |
0f2d19dd | 741 | SCM |
6e8d25a6 | 742 | scm_m_do (SCM xorig, SCM env) |
0f2d19dd JB |
743 | { |
744 | SCM x = SCM_CDR (xorig), arg1, proc; | |
745 | SCM vars = SCM_EOL, inits = SCM_EOL, steps = SCM_EOL; | |
746 | SCM *initloc = &inits, *steploc = &steps; | |
747 | int len = scm_ilength (x); | |
6cb702da | 748 | SCM_ASSYNT (len >= 2, xorig, scm_s_test, "do"); |
0f2d19dd | 749 | proc = SCM_CAR (x); |
6cb702da | 750 | SCM_ASSYNT (scm_ilength (proc) >= 0, xorig, scm_s_bindings, "do"); |
ff467021 | 751 | while (SCM_NIMP(proc)) |
0f2d19dd JB |
752 | { |
753 | arg1 = SCM_CAR (proc); | |
754 | len = scm_ilength (arg1); | |
6cb702da | 755 | SCM_ASSYNT (2 == len || 3 == len, xorig, scm_s_bindings, "do"); |
0c95b57d | 756 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (arg1)), xorig, scm_s_variable, "do"); |
0f2d19dd JB |
757 | /* vars reversed here, inits and steps reversed at evaluation */ |
758 | vars = scm_cons (SCM_CAR (arg1), vars); /* variable */ | |
759 | arg1 = SCM_CDR (arg1); | |
760 | *initloc = scm_cons (SCM_CAR (arg1), SCM_EOL); /* init */ | |
a23afe53 | 761 | initloc = SCM_CDRLOC (*initloc); |
0f2d19dd JB |
762 | arg1 = SCM_CDR (arg1); |
763 | *steploc = scm_cons (SCM_IMP (arg1) ? SCM_CAR (vars) : SCM_CAR (arg1), SCM_EOL); /* step */ | |
a23afe53 | 764 | steploc = SCM_CDRLOC (*steploc); |
0f2d19dd JB |
765 | proc = SCM_CDR (proc); |
766 | } | |
767 | x = SCM_CDR (x); | |
6cb702da | 768 | SCM_ASSYNT (scm_ilength (SCM_CAR (x)) >= 1, xorig, scm_s_test, "do"); |
0f2d19dd JB |
769 | x = scm_cons2 (SCM_CAR (x), SCM_CDR (x), steps); |
770 | x = scm_cons2 (vars, inits, x); | |
3a3111a8 | 771 | return scm_cons (SCM_IM_DO, x); |
0f2d19dd JB |
772 | } |
773 | ||
6dbd0af5 MD |
774 | /* evalcar is small version of inline EVALCAR when we don't care about |
775 | * speed | |
776 | */ | |
777 | #define evalcar scm_eval_car | |
0f2d19dd | 778 | |
1cc91f1b | 779 | |
1bbd0b84 | 780 | static SCM iqq (SCM form, SCM env, int depth); |
1cc91f1b | 781 | |
b8229a3b | 782 | SCM_SYNTAX(s_quasiquote, "quasiquote", scm_makacro, scm_m_quasiquote); |
2f0d1375 | 783 | SCM_GLOBAL_SYMBOL(scm_sym_quasiquote, s_quasiquote); |
b8229a3b MS |
784 | |
785 | SCM | |
6e8d25a6 | 786 | scm_m_quasiquote (SCM xorig, SCM env) |
b8229a3b MS |
787 | { |
788 | SCM x = SCM_CDR (xorig); | |
789 | SCM_ASSYNT (scm_ilength (x) == 1, xorig, scm_s_expression, s_quasiquote); | |
790 | return iqq (SCM_CAR (x), env, 1); | |
791 | } | |
792 | ||
793 | ||
0f2d19dd | 794 | static SCM |
1bbd0b84 | 795 | iqq (SCM form,SCM env,int depth) |
0f2d19dd JB |
796 | { |
797 | SCM tmp; | |
798 | int edepth = depth; | |
ff467021 JB |
799 | if (SCM_IMP(form)) |
800 | return form; | |
0f2d19dd JB |
801 | if (SCM_VECTORP (form)) |
802 | { | |
b5c2579a | 803 | long i = SCM_VECTOR_LENGTH (form); |
0f2d19dd JB |
804 | SCM *data = SCM_VELTS (form); |
805 | tmp = SCM_EOL; | |
806 | for (; --i >= 0;) | |
807 | tmp = scm_cons (data[i], tmp); | |
808 | return scm_vector (iqq (tmp, env, depth)); | |
809 | } | |
ff467021 JB |
810 | if (SCM_NCONSP(form)) |
811 | return form; | |
0f2d19dd | 812 | tmp = SCM_CAR (form); |
cf498326 | 813 | if (SCM_EQ_P (scm_sym_quasiquote, tmp)) |
0f2d19dd JB |
814 | { |
815 | depth++; | |
816 | goto label; | |
817 | } | |
cf498326 | 818 | if (SCM_EQ_P (scm_sym_unquote, tmp)) |
0f2d19dd JB |
819 | { |
820 | --depth; | |
821 | label: | |
822 | form = SCM_CDR (form); | |
0c95b57d GB |
823 | SCM_ASSERT (SCM_ECONSP (form) && SCM_NULLP (SCM_CDR (form)), |
824 | form, SCM_ARG1, s_quasiquote); | |
0f2d19dd JB |
825 | if (0 == depth) |
826 | return evalcar (form, env); | |
827 | return scm_cons2 (tmp, iqq (SCM_CAR (form), env, depth), SCM_EOL); | |
828 | } | |
cf498326 | 829 | if (SCM_NIMP (tmp) && (SCM_EQ_P (scm_sym_uq_splicing, SCM_CAR (tmp)))) |
0f2d19dd JB |
830 | { |
831 | tmp = SCM_CDR (tmp); | |
832 | if (0 == --edepth) | |
833 | return scm_append (scm_cons2 (evalcar (tmp, env), iqq (SCM_CDR (form), env, depth), SCM_EOL)); | |
834 | } | |
835 | return scm_cons (iqq (SCM_CAR (form), env, edepth), iqq (SCM_CDR (form), env, depth)); | |
836 | } | |
837 | ||
838 | /* Here are acros which return values rather than code. */ | |
839 | ||
a570e93a MD |
840 | SCM_SYNTAX (s_delay, "delay", scm_makmmacro, scm_m_delay); |
841 | SCM_GLOBAL_SYMBOL (scm_sym_delay, s_delay); | |
1cc91f1b | 842 | |
0f2d19dd | 843 | SCM |
6e8d25a6 | 844 | scm_m_delay (SCM xorig, SCM env) |
0f2d19dd | 845 | { |
6cb702da | 846 | SCM_ASSYNT (scm_ilength (xorig) == 2, xorig, scm_s_expression, s_delay); |
a570e93a | 847 | return scm_cons2 (SCM_IM_DELAY, SCM_EOL, SCM_CDR (xorig)); |
0f2d19dd JB |
848 | } |
849 | ||
1cc91f1b | 850 | |
b8229a3b | 851 | SCM_SYNTAX(s_define, "define", scm_makmmacro, scm_m_define); |
2f0d1375 | 852 | SCM_GLOBAL_SYMBOL(scm_sym_define, s_define); |
1cc91f1b | 853 | |
0f2d19dd | 854 | SCM |
6e8d25a6 | 855 | scm_m_define (SCM x, SCM env) |
0f2d19dd JB |
856 | { |
857 | SCM proc, arg1 = x; | |
858 | x = SCM_CDR (x); | |
b8229a3b | 859 | SCM_ASSYNT (scm_ilength (x) >= 2, arg1, scm_s_expression, s_define); |
0f2d19dd JB |
860 | proc = SCM_CAR (x); |
861 | x = SCM_CDR (x); | |
0c95b57d | 862 | while (SCM_CONSP (proc)) |
0f2d19dd | 863 | { /* nested define syntax */ |
2f0d1375 | 864 | x = scm_cons (scm_cons2 (scm_sym_lambda, SCM_CDR (proc), x), SCM_EOL); |
0f2d19dd JB |
865 | proc = SCM_CAR (proc); |
866 | } | |
0c95b57d | 867 | SCM_ASSYNT (SCM_SYMBOLP (proc), |
b8229a3b MS |
868 | arg1, scm_s_variable, s_define); |
869 | SCM_ASSYNT (1 == scm_ilength (x), arg1, scm_s_expression, s_define); | |
0f2d19dd JB |
870 | if (SCM_TOP_LEVEL (env)) |
871 | { | |
872 | x = evalcar (x, env); | |
6dbd0af5 | 873 | #ifdef DEBUG_EXTENSIONS |
80ea260c MD |
874 | if (SCM_REC_PROCNAMES_P && SCM_NIMP (x)) |
875 | { | |
876 | arg1 = x; | |
877 | proc: | |
878 | if (SCM_CLOSUREP (arg1) | |
879 | /* Only the first definition determines the name. */ | |
cf498326 | 880 | && SCM_FALSEP (scm_procedure_property (arg1, scm_sym_name))) |
2f0d1375 | 881 | scm_set_procedure_property_x (arg1, scm_sym_name, proc); |
80ea260c | 882 | else if (SCM_TYP16 (arg1) == scm_tc16_macro |
cf498326 | 883 | && !SCM_EQ_P (SCM_CDR (arg1), arg1)) |
80ea260c MD |
884 | { |
885 | arg1 = SCM_CDR (arg1); | |
886 | goto proc; | |
887 | } | |
888 | } | |
6dbd0af5 | 889 | #endif |
6cb702da | 890 | arg1 = scm_sym2vcell (proc, scm_env_top_level (env), SCM_BOOL_T); |
a23afe53 | 891 | SCM_SETCDR (arg1, x); |
0f2d19dd | 892 | #ifdef SICP |
2f0d1375 | 893 | return scm_cons2 (scm_sym_quote, SCM_CAR (arg1), SCM_EOL); |
0f2d19dd JB |
894 | #else |
895 | return SCM_UNSPECIFIED; | |
896 | #endif | |
897 | } | |
898 | return scm_cons2 (SCM_IM_DEFINE, proc, x); | |
899 | } | |
6dbd0af5 | 900 | |
0f2d19dd JB |
901 | /* end of acros */ |
902 | ||
26d5b9b4 | 903 | static SCM |
6e8d25a6 | 904 | scm_m_letrec1 (SCM op, SCM imm, SCM xorig, SCM env) |
0f2d19dd JB |
905 | { |
906 | SCM cdrx = SCM_CDR (xorig); /* locally mutable version of form */ | |
3db4adfc | 907 | char *what = SCM_SYMBOL_CHARS (SCM_CAR (xorig)); |
0f2d19dd JB |
908 | SCM x = cdrx, proc, arg1; /* structure traversers */ |
909 | SCM vars = SCM_EOL, inits = SCM_EOL, *initloc = &inits; | |
910 | ||
0f2d19dd | 911 | proc = SCM_CAR (x); |
ab66ae47 | 912 | SCM_ASSYNT (scm_ilength (proc) >= 1, xorig, scm_s_bindings, what); |
0f2d19dd JB |
913 | do |
914 | { | |
915 | /* vars scm_list reversed here, inits reversed at evaluation */ | |
916 | arg1 = SCM_CAR (proc); | |
ab66ae47 DH |
917 | SCM_ASSYNT (2 == scm_ilength (arg1), xorig, scm_s_bindings, what); |
918 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (arg1)), xorig, scm_s_variable, what); | |
185ab0ef | 919 | if (scm_c_improper_memq (SCM_CAR (arg1), vars)) |
db4b4ca6 | 920 | scm_misc_error (what, scm_s_duplicate_bindings, SCM_EOL); |
0f2d19dd JB |
921 | vars = scm_cons (SCM_CAR (arg1), vars); |
922 | *initloc = scm_cons (SCM_CAR (SCM_CDR (arg1)), SCM_EOL); | |
a23afe53 | 923 | initloc = SCM_CDRLOC (*initloc); |
0f2d19dd | 924 | } |
ff467021 | 925 | while (SCM_NIMP (proc = SCM_CDR (proc))); |
26d5b9b4 | 926 | |
3a3111a8 MD |
927 | return scm_cons2 (op, vars, |
928 | scm_cons (inits, scm_m_body (imm, SCM_CDR (x), what))); | |
0f2d19dd JB |
929 | } |
930 | ||
26d5b9b4 | 931 | SCM_SYNTAX(s_letrec, "letrec", scm_makmmacro, scm_m_letrec); |
2f0d1375 | 932 | SCM_GLOBAL_SYMBOL(scm_sym_letrec, s_letrec); |
26d5b9b4 MD |
933 | |
934 | SCM | |
6e8d25a6 | 935 | scm_m_letrec (SCM xorig, SCM env) |
26d5b9b4 MD |
936 | { |
937 | SCM x = SCM_CDR (xorig); | |
938 | SCM_ASSYNT (scm_ilength (x) >= 2, xorig, scm_s_body, s_letrec); | |
939 | ||
940 | if (SCM_NULLP (SCM_CAR (x))) /* null binding, let* faster */ | |
3a3111a8 MD |
941 | return scm_m_letstar (scm_cons2 (SCM_CAR (xorig), SCM_EOL, |
942 | scm_m_body (SCM_IM_LETREC, | |
943 | SCM_CDR (x), | |
944 | s_letrec)), | |
26d5b9b4 MD |
945 | env); |
946 | else | |
947 | return scm_m_letrec1 (SCM_IM_LETREC, SCM_IM_LETREC, xorig, env); | |
948 | } | |
1cc91f1b | 949 | |
b8229a3b | 950 | SCM_SYNTAX(s_let, "let", scm_makmmacro, scm_m_let); |
2f0d1375 | 951 | SCM_GLOBAL_SYMBOL(scm_sym_let, s_let); |
b8229a3b | 952 | |
0f2d19dd | 953 | SCM |
6e8d25a6 | 954 | scm_m_let (SCM xorig, SCM env) |
0f2d19dd JB |
955 | { |
956 | SCM cdrx = SCM_CDR (xorig); /* locally mutable version of form */ | |
957 | SCM x = cdrx, proc, arg1, name; /* structure traversers */ | |
958 | SCM vars = SCM_EOL, inits = SCM_EOL, *varloc = &vars, *initloc = &inits; | |
959 | ||
b8229a3b | 960 | SCM_ASSYNT (scm_ilength (x) >= 2, xorig, scm_s_body, s_let); |
0f2d19dd JB |
961 | proc = SCM_CAR (x); |
962 | if (SCM_NULLP (proc) | |
0c95b57d | 963 | || (SCM_CONSP (proc) |
26d5b9b4 MD |
964 | && SCM_CONSP (SCM_CAR (proc)) && SCM_NULLP (SCM_CDR (proc)))) |
965 | { | |
966 | /* null or single binding, let* is faster */ | |
3a3111a8 MD |
967 | return scm_m_letstar (scm_cons2 (SCM_CAR (xorig), proc, |
968 | scm_m_body (SCM_IM_LET, | |
969 | SCM_CDR (x), | |
970 | s_let)), | |
26d5b9b4 MD |
971 | env); |
972 | } | |
973 | ||
b8229a3b | 974 | SCM_ASSYNT (SCM_NIMP (proc), xorig, scm_s_bindings, s_let); |
185ab0ef | 975 | if (SCM_CONSP (proc)) |
26d5b9b4 MD |
976 | { |
977 | /* plain let, proc is <bindings> */ | |
978 | return scm_m_letrec1 (SCM_IM_LET, SCM_IM_LET, xorig, env); | |
979 | } | |
980 | ||
0f2d19dd | 981 | if (!SCM_SYMBOLP (proc)) |
db4b4ca6 | 982 | scm_misc_error (s_let, scm_s_bindings, SCM_EOL); /* bad let */ |
0f2d19dd JB |
983 | name = proc; /* named let, build equiv letrec */ |
984 | x = SCM_CDR (x); | |
b8229a3b | 985 | SCM_ASSYNT (scm_ilength (x) >= 2, xorig, scm_s_body, s_let); |
26d5b9b4 | 986 | proc = SCM_CAR (x); /* bindings list */ |
b8229a3b | 987 | SCM_ASSYNT (scm_ilength (proc) >= 0, xorig, scm_s_bindings, s_let); |
ff467021 | 988 | while (SCM_NIMP (proc)) |
0f2d19dd JB |
989 | { /* vars and inits both in order */ |
990 | arg1 = SCM_CAR (proc); | |
b8229a3b | 991 | SCM_ASSYNT (2 == scm_ilength (arg1), xorig, scm_s_bindings, s_let); |
0c95b57d | 992 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (arg1)), |
b8229a3b | 993 | xorig, scm_s_variable, s_let); |
0f2d19dd | 994 | *varloc = scm_cons (SCM_CAR (arg1), SCM_EOL); |
a23afe53 | 995 | varloc = SCM_CDRLOC (*varloc); |
0f2d19dd | 996 | *initloc = scm_cons (SCM_CAR (SCM_CDR (arg1)), SCM_EOL); |
a23afe53 | 997 | initloc = SCM_CDRLOC (*initloc); |
0f2d19dd JB |
998 | proc = SCM_CDR (proc); |
999 | } | |
26d5b9b4 | 1000 | |
2f0d1375 | 1001 | proc = scm_cons2 (scm_sym_lambda, vars, |
26d5b9b4 | 1002 | scm_m_body (SCM_IM_LET, SCM_CDR (x), "let")); |
2f0d1375 | 1003 | proc = scm_cons2 (scm_sym_let, scm_cons (scm_cons2 (name, proc, SCM_EOL), |
26d5b9b4 MD |
1004 | SCM_EOL), |
1005 | scm_acons (name, inits, SCM_EOL)); | |
1006 | return scm_m_letrec1 (SCM_IM_LETREC, SCM_IM_LET, proc, env); | |
0f2d19dd JB |
1007 | } |
1008 | ||
1009 | ||
81123e6d MD |
1010 | SCM_SYNTAX (s_atapply,"@apply", scm_makmmacro, scm_m_apply); |
1011 | SCM_GLOBAL_SYMBOL (scm_sym_atapply, s_atapply); | |
1012 | SCM_GLOBAL_SYMBOL (scm_sym_apply, s_atapply + 1); | |
1cc91f1b | 1013 | |
0f2d19dd | 1014 | SCM |
6e8d25a6 | 1015 | scm_m_apply (SCM xorig, SCM env) |
0f2d19dd | 1016 | { |
6cb702da | 1017 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 2, |
b8229a3b | 1018 | xorig, scm_s_expression, s_atapply); |
0f2d19dd JB |
1019 | return scm_cons (SCM_IM_APPLY, SCM_CDR (xorig)); |
1020 | } | |
1021 | ||
b8229a3b MS |
1022 | |
1023 | SCM_SYNTAX(s_atcall_cc,"@call-with-current-continuation", scm_makmmacro, scm_m_cont); | |
2f0d1375 | 1024 | SCM_GLOBAL_SYMBOL(scm_sym_atcall_cc,s_atcall_cc); |
0f2d19dd | 1025 | |
1cc91f1b | 1026 | |
0f2d19dd | 1027 | SCM |
6e8d25a6 | 1028 | scm_m_cont (SCM xorig, SCM env) |
0f2d19dd | 1029 | { |
6cb702da | 1030 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, |
b8229a3b | 1031 | xorig, scm_s_expression, s_atcall_cc); |
3a3111a8 | 1032 | return scm_cons (SCM_IM_CONT, SCM_CDR (xorig)); |
0f2d19dd JB |
1033 | } |
1034 | ||
73b64342 MD |
1035 | /* Multi-language support */ |
1036 | ||
43a912cf MD |
1037 | SCM scm_lisp_nil; |
1038 | SCM scm_lisp_t; | |
73b64342 MD |
1039 | |
1040 | SCM_SYNTAX (s_nil_cond, "nil-cond", scm_makmmacro, scm_m_nil_cond); | |
1041 | ||
1042 | SCM | |
1043 | scm_m_nil_cond (SCM xorig, SCM env) | |
1044 | { | |
1045 | int len = scm_ilength (SCM_CDR (xorig)); | |
1046 | SCM_ASSYNT (len >= 1 && (len & 1) == 1, xorig, | |
1047 | scm_s_expression, "nil-cond"); | |
1048 | return scm_cons (SCM_IM_NIL_COND, SCM_CDR (xorig)); | |
1049 | } | |
1050 | ||
1051 | SCM_SYNTAX (s_nil_ify, "nil-ify", scm_makmmacro, scm_m_nil_ify); | |
1052 | ||
1053 | SCM | |
1054 | scm_m_nil_ify (SCM xorig, SCM env) | |
1055 | { | |
1056 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, | |
1057 | xorig, scm_s_expression, "nil-ify"); | |
1058 | return scm_cons (SCM_IM_NIL_IFY, SCM_CDR (xorig)); | |
1059 | } | |
1060 | ||
1061 | SCM_SYNTAX (s_t_ify, "t-ify", scm_makmmacro, scm_m_t_ify); | |
1062 | ||
1063 | SCM | |
1064 | scm_m_t_ify (SCM xorig, SCM env) | |
1065 | { | |
1066 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, | |
1067 | xorig, scm_s_expression, "t-ify"); | |
1068 | return scm_cons (SCM_IM_T_IFY, SCM_CDR (xorig)); | |
1069 | } | |
1070 | ||
1071 | SCM_SYNTAX (s_0_cond, "0-cond", scm_makmmacro, scm_m_0_cond); | |
1072 | ||
1073 | SCM | |
1074 | scm_m_0_cond (SCM xorig, SCM env) | |
1075 | { | |
1076 | int len = scm_ilength (SCM_CDR (xorig)); | |
1077 | SCM_ASSYNT (len >= 1 && (len & 1) == 1, xorig, | |
1078 | scm_s_expression, "0-cond"); | |
1079 | return scm_cons (SCM_IM_0_COND, SCM_CDR (xorig)); | |
1080 | } | |
1081 | ||
1082 | SCM_SYNTAX (s_0_ify, "0-ify", scm_makmmacro, scm_m_0_ify); | |
1083 | ||
1084 | SCM | |
1085 | scm_m_0_ify (SCM xorig, SCM env) | |
1086 | { | |
1087 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, | |
1088 | xorig, scm_s_expression, "0-ify"); | |
1089 | return scm_cons (SCM_IM_0_IFY, SCM_CDR (xorig)); | |
1090 | } | |
1091 | ||
1092 | SCM_SYNTAX (s_1_ify, "1-ify", scm_makmmacro, scm_m_1_ify); | |
1093 | ||
1094 | SCM | |
1095 | scm_m_1_ify (SCM xorig, SCM env) | |
1096 | { | |
1097 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, | |
1098 | xorig, scm_s_expression, "1-ify"); | |
1099 | return scm_cons (SCM_IM_1_IFY, SCM_CDR (xorig)); | |
1100 | } | |
1101 | ||
1102 | SCM_SYNTAX (s_atfop, "@fop", scm_makmmacro, scm_m_atfop); | |
1103 | ||
1104 | SCM | |
1105 | scm_m_atfop (SCM xorig, SCM env) | |
1106 | { | |
1107 | SCM x = SCM_CDR (xorig), vcell; | |
1108 | SCM_ASSYNT (scm_ilength (x) >= 1, xorig, scm_s_expression, "@fop"); | |
1109 | vcell = scm_symbol_fref (SCM_CAR (x)); | |
0c95b57d | 1110 | SCM_ASSYNT (SCM_CONSP (vcell), x, |
73b64342 | 1111 | "Symbol's function definition is void", NULL); |
3201d763 | 1112 | SCM_SET_CELL_WORD_0 (x, SCM_UNPACK (vcell) + scm_tc3_cons_gloc); |
73b64342 MD |
1113 | return x; |
1114 | } | |
1115 | ||
1116 | SCM_SYNTAX (s_atbind, "@bind", scm_makmmacro, scm_m_atbind); | |
1117 | ||
1118 | SCM | |
1119 | scm_m_atbind (SCM xorig, SCM env) | |
1120 | { | |
1121 | SCM x = SCM_CDR (xorig); | |
1122 | SCM_ASSYNT (scm_ilength (x) > 1, xorig, scm_s_expression, "@bind"); | |
1123 | ||
1124 | if (SCM_IMP (env)) | |
1125 | env = SCM_BOOL_F; | |
1126 | else | |
1127 | { | |
1128 | while (SCM_NIMP (SCM_CDR (env))) | |
1129 | env = SCM_CDR (env); | |
1130 | env = SCM_CAR (env); | |
1131 | if (SCM_CONSP (env)) | |
1132 | env = SCM_BOOL_F; | |
1133 | } | |
1134 | ||
1135 | x = SCM_CAR (x); | |
1136 | while (SCM_NIMP (x)) | |
1137 | { | |
3201d763 | 1138 | SCM_SET_CELL_WORD_0 (x, SCM_UNPACK (scm_sym2vcell (SCM_CAR (x), env, SCM_BOOL_T)) + scm_tc3_cons_gloc); |
73b64342 MD |
1139 | x = SCM_CDR (x); |
1140 | } | |
1141 | return scm_cons (SCM_IM_BIND, SCM_CDR (xorig)); | |
1142 | } | |
73b64342 | 1143 | |
26d5b9b4 MD |
1144 | SCM |
1145 | scm_m_expand_body (SCM xorig, SCM env) | |
1146 | { | |
1147 | SCM form, x = SCM_CDR (xorig), defs = SCM_EOL; | |
1148 | char *what = SCM_ISYMCHARS (SCM_CAR (xorig)) + 2; | |
1149 | ||
1150 | while (SCM_NIMP (x)) | |
1151 | { | |
1152 | form = SCM_CAR (x); | |
1153 | if (SCM_IMP (form) || SCM_NCONSP (form)) | |
1154 | break; | |
1155 | if (SCM_IMP (SCM_CAR (form))) | |
1156 | break; | |
1157 | if (!SCM_SYMBOLP (SCM_CAR (form))) | |
1158 | break; | |
1159 | ||
3a3111a8 MD |
1160 | form = scm_macroexp (scm_cons_source (form, |
1161 | SCM_CAR (form), | |
1162 | SCM_CDR (form)), | |
1163 | env); | |
26d5b9b4 | 1164 | |
cf498326 | 1165 | if (SCM_EQ_P (SCM_IM_DEFINE, SCM_CAR (form))) |
26d5b9b4 MD |
1166 | { |
1167 | defs = scm_cons (SCM_CDR (form), defs); | |
1168 | x = SCM_CDR(x); | |
1169 | } | |
1170 | else if (SCM_NIMP(defs)) | |
1171 | { | |
1172 | break; | |
1173 | } | |
cf498326 | 1174 | else if (SCM_EQ_P (SCM_IM_BEGIN, SCM_CAR (form))) |
26d5b9b4 MD |
1175 | { |
1176 | x = scm_append (scm_cons2 (SCM_CDR (form), SCM_CDR (x), SCM_EOL)); | |
1177 | } | |
1178 | else | |
1179 | { | |
1180 | x = scm_cons (form, SCM_CDR(x)); | |
1181 | break; | |
1182 | } | |
1183 | } | |
1184 | ||
1185 | SCM_ASSYNT (SCM_NIMP (x), SCM_CDR (xorig), scm_s_body, what); | |
1186 | if (SCM_NIMP (defs)) | |
1187 | { | |
1188 | x = scm_cons (scm_m_letrec1 (SCM_IM_LETREC, | |
1189 | SCM_IM_DEFINE, | |
2f0d1375 | 1190 | scm_cons2 (scm_sym_define, defs, x), |
26d5b9b4 MD |
1191 | env), |
1192 | SCM_EOL); | |
1193 | } | |
1194 | ||
1195 | SCM_DEFER_INTS; | |
1196 | SCM_SETCAR (xorig, SCM_CAR (x)); | |
1197 | SCM_SETCDR (xorig, SCM_CDR (x)); | |
1198 | SCM_ALLOW_INTS; | |
1199 | ||
1200 | return xorig; | |
1201 | } | |
1202 | ||
1203 | SCM | |
1204 | scm_macroexp (SCM x, SCM env) | |
1205 | { | |
1206 | SCM res, proc; | |
1207 | ||
1208 | /* Don't bother to produce error messages here. We get them when we | |
1209 | eventually execute the code for real. */ | |
1210 | ||
1211 | macro_tail: | |
44d3cb0d | 1212 | if (!SCM_SYMBOLP (SCM_CAR (x))) |
26d5b9b4 MD |
1213 | return x; |
1214 | ||
1215 | #ifdef USE_THREADS | |
1216 | { | |
1217 | SCM *proc_ptr = scm_lookupcar1 (x, env, 0); | |
1218 | if (proc_ptr == NULL) | |
1219 | { | |
1220 | /* We have lost the race. */ | |
1221 | goto macro_tail; | |
1222 | } | |
1223 | proc = *proc_ptr; | |
1224 | } | |
1225 | #else | |
1226 | proc = *scm_lookupcar (x, env, 0); | |
1227 | #endif | |
1228 | ||
1229 | /* Only handle memoizing macros. `Acros' and `macros' are really | |
1230 | special forms and should not be evaluated here. */ | |
1231 | ||
1232 | if (SCM_IMP (proc) | |
1233 | || scm_tc16_macro != SCM_TYP16 (proc) | |
445f675c | 1234 | || (SCM_CELL_WORD_0 (proc) >> 16) != 2) |
26d5b9b4 MD |
1235 | return x; |
1236 | ||
1237 | unmemocar (x, env); | |
1238 | res = scm_apply (SCM_CDR (proc), x, scm_cons (env, scm_listofnull)); | |
1239 | ||
1240 | if (scm_ilength (res) <= 0) | |
1241 | res = scm_cons2 (SCM_IM_BEGIN, res, SCM_EOL); | |
1242 | ||
26d5b9b4 MD |
1243 | SCM_DEFER_INTS; |
1244 | SCM_SETCAR (x, SCM_CAR (res)); | |
1245 | SCM_SETCDR (x, SCM_CDR (res)); | |
1246 | SCM_ALLOW_INTS; | |
1247 | ||
1248 | goto macro_tail; | |
1249 | } | |
73b64342 | 1250 | |
6dbd0af5 MD |
1251 | /* scm_unmemocopy takes a memoized expression together with its |
1252 | * environment and rewrites it to its original form. Thus, it is the | |
1253 | * inversion of the rewrite rules above. The procedure is not | |
1254 | * optimized for speed. It's used in scm_iprin1 when printing the | |
220ff1eb MD |
1255 | * code of a closure, in scm_procedure_source, in display_frame when |
1256 | * generating the source for a stackframe in a backtrace, and in | |
1257 | * display_expression. | |
6dbd0af5 MD |
1258 | */ |
1259 | ||
26d5b9b4 MD |
1260 | /* We should introduce an anti-macro interface so that it is possible |
1261 | * to plug in transformers in both directions from other compilation | |
1262 | * units. unmemocopy could then dispatch to anti-macro transformers. | |
1263 | * (Those transformers could perhaps be written in slightly more | |
1264 | * readable style... :) | |
1265 | */ | |
1266 | ||
f1267706 | 1267 | #define SCM_BIT8(x) (127 & SCM_UNPACK (x)) |
c209c88e | 1268 | |
6dbd0af5 | 1269 | static SCM |
1bbd0b84 | 1270 | unmemocopy (SCM x, SCM env) |
6dbd0af5 MD |
1271 | { |
1272 | SCM ls, z; | |
1273 | #ifdef DEBUG_EXTENSIONS | |
1274 | SCM p; | |
1275 | #endif | |
1276 | if (SCM_NCELLP (x) || SCM_NECONSP (x)) | |
1277 | return x; | |
1278 | #ifdef DEBUG_EXTENSIONS | |
1279 | p = scm_whash_lookup (scm_source_whash, x); | |
1280 | #endif | |
1281 | switch (SCM_TYP7 (x)) | |
1282 | { | |
c209c88e | 1283 | case SCM_BIT8(SCM_IM_AND): |
2f0d1375 | 1284 | ls = z = scm_cons (scm_sym_and, SCM_UNSPECIFIED); |
6dbd0af5 | 1285 | break; |
c209c88e | 1286 | case SCM_BIT8(SCM_IM_BEGIN): |
2f0d1375 | 1287 | ls = z = scm_cons (scm_sym_begin, SCM_UNSPECIFIED); |
6dbd0af5 | 1288 | break; |
c209c88e | 1289 | case SCM_BIT8(SCM_IM_CASE): |
2f0d1375 | 1290 | ls = z = scm_cons (scm_sym_case, SCM_UNSPECIFIED); |
6dbd0af5 | 1291 | break; |
c209c88e | 1292 | case SCM_BIT8(SCM_IM_COND): |
2f0d1375 | 1293 | ls = z = scm_cons (scm_sym_cond, SCM_UNSPECIFIED); |
6dbd0af5 | 1294 | break; |
c209c88e | 1295 | case SCM_BIT8(SCM_IM_DO): |
2f0d1375 | 1296 | ls = scm_cons (scm_sym_do, SCM_UNSPECIFIED); |
6dbd0af5 | 1297 | goto transform; |
c209c88e | 1298 | case SCM_BIT8(SCM_IM_IF): |
2f0d1375 | 1299 | ls = z = scm_cons (scm_sym_if, SCM_UNSPECIFIED); |
6dbd0af5 | 1300 | break; |
c209c88e | 1301 | case SCM_BIT8(SCM_IM_LET): |
2f0d1375 | 1302 | ls = scm_cons (scm_sym_let, SCM_UNSPECIFIED); |
6dbd0af5 | 1303 | goto transform; |
c209c88e | 1304 | case SCM_BIT8(SCM_IM_LETREC): |
6dbd0af5 MD |
1305 | { |
1306 | SCM f, v, e, s; | |
2f0d1375 | 1307 | ls = scm_cons (scm_sym_letrec, SCM_UNSPECIFIED); |
6dbd0af5 MD |
1308 | transform: |
1309 | x = SCM_CDR (x); | |
26d5b9b4 | 1310 | /* binding names */ |
6dbd0af5 MD |
1311 | f = v = SCM_CAR (x); |
1312 | x = SCM_CDR (x); | |
e2806c10 | 1313 | z = EXTEND_ENV (f, SCM_EOL, env); |
26d5b9b4 | 1314 | /* inits */ |
6dbd0af5 | 1315 | e = scm_reverse (unmemocopy (SCM_CAR (x), |
cf498326 | 1316 | SCM_EQ_P (SCM_CAR (ls), scm_sym_letrec) ? z : env)); |
6dbd0af5 | 1317 | env = z; |
26d5b9b4 | 1318 | /* increments */ |
cf498326 | 1319 | s = SCM_EQ_P (SCM_CAR (ls), scm_sym_do) |
6dbd0af5 MD |
1320 | ? scm_reverse (unmemocopy (SCM_CDR (SCM_CDR (SCM_CDR (x))), env)) |
1321 | : f; | |
26d5b9b4 | 1322 | /* build transformed binding list */ |
6dbd0af5 | 1323 | z = SCM_EOL; |
1bd07992 | 1324 | while (SCM_NIMP (v)) |
6dbd0af5 MD |
1325 | { |
1326 | z = scm_acons (SCM_CAR (v), | |
1327 | scm_cons (SCM_CAR (e), | |
cf498326 | 1328 | SCM_EQ_P (SCM_CAR (s), SCM_CAR (v)) |
6dbd0af5 MD |
1329 | ? SCM_EOL |
1330 | : scm_cons (SCM_CAR (s), SCM_EOL)), | |
1331 | z); | |
1332 | v = SCM_CDR (v); | |
1333 | e = SCM_CDR (e); | |
1334 | s = SCM_CDR (s); | |
1335 | } | |
a23afe53 MD |
1336 | z = scm_cons (z, SCM_UNSPECIFIED); |
1337 | SCM_SETCDR (ls, z); | |
cf498326 | 1338 | if (SCM_EQ_P (SCM_CAR (ls), scm_sym_do)) |
6dbd0af5 MD |
1339 | { |
1340 | x = SCM_CDR (x); | |
26d5b9b4 | 1341 | /* test clause */ |
a23afe53 | 1342 | SCM_SETCDR (z, scm_cons (unmemocopy (SCM_CAR (x), env), |
6dbd0af5 | 1343 | SCM_UNSPECIFIED)); |
a23afe53 MD |
1344 | z = SCM_CDR (z); |
1345 | x = (SCM) (SCM_CARLOC (SCM_CDR (x)) - 1); | |
26d5b9b4 MD |
1346 | /* body forms are now to be found in SCM_CDR (x) |
1347 | (this is how *real* code look like! :) */ | |
6dbd0af5 MD |
1348 | } |
1349 | break; | |
1350 | } | |
c209c88e | 1351 | case SCM_BIT8(SCM_IM_LETSTAR): |
6dbd0af5 MD |
1352 | { |
1353 | SCM b, y; | |
1354 | x = SCM_CDR (x); | |
1355 | b = SCM_CAR (x); | |
1356 | y = SCM_EOL; | |
1357 | if SCM_IMP (b) | |
1358 | { | |
e2806c10 | 1359 | env = EXTEND_ENV (SCM_EOL, SCM_EOL, env); |
6dbd0af5 MD |
1360 | goto letstar; |
1361 | } | |
1362 | y = z = scm_acons (SCM_CAR (b), | |
1363 | unmemocar ( | |
1364 | scm_cons (unmemocopy (SCM_CAR (SCM_CDR (b)), env), SCM_EOL), env), | |
1365 | SCM_UNSPECIFIED); | |
e2806c10 | 1366 | env = EXTEND_ENV (SCM_CAR (b), SCM_BOOL_F, env); |
6dbd0af5 MD |
1367 | b = SCM_CDR (SCM_CDR (b)); |
1368 | if (SCM_IMP (b)) | |
1369 | { | |
1370 | SCM_SETCDR (y, SCM_EOL); | |
2f0d1375 | 1371 | ls = scm_cons (scm_sym_let, z = scm_cons (y, SCM_UNSPECIFIED)); |
6dbd0af5 MD |
1372 | break; |
1373 | } | |
1374 | do | |
1375 | { | |
a23afe53 MD |
1376 | SCM_SETCDR (z, scm_acons (SCM_CAR (b), |
1377 | unmemocar ( | |
6dbd0af5 | 1378 | scm_cons (unmemocopy (SCM_CAR (SCM_CDR (b)), env), SCM_EOL), env), |
a23afe53 MD |
1379 | SCM_UNSPECIFIED)); |
1380 | z = SCM_CDR (z); | |
e2806c10 | 1381 | env = EXTEND_ENV (SCM_CAR (b), SCM_BOOL_F, env); |
6dbd0af5 MD |
1382 | b = SCM_CDR (SCM_CDR (b)); |
1383 | } | |
ff467021 | 1384 | while (SCM_NIMP (b)); |
a23afe53 | 1385 | SCM_SETCDR (z, SCM_EOL); |
6dbd0af5 | 1386 | letstar: |
2f0d1375 | 1387 | ls = scm_cons (scm_sym_letstar, z = scm_cons (y, SCM_UNSPECIFIED)); |
6dbd0af5 MD |
1388 | break; |
1389 | } | |
c209c88e | 1390 | case SCM_BIT8(SCM_IM_OR): |
2f0d1375 | 1391 | ls = z = scm_cons (scm_sym_or, SCM_UNSPECIFIED); |
6dbd0af5 | 1392 | break; |
c209c88e | 1393 | case SCM_BIT8(SCM_IM_LAMBDA): |
6dbd0af5 | 1394 | x = SCM_CDR (x); |
2f0d1375 | 1395 | ls = scm_cons (scm_sym_lambda, |
6dbd0af5 | 1396 | z = scm_cons (SCM_CAR (x), SCM_UNSPECIFIED)); |
e2806c10 | 1397 | env = EXTEND_ENV (SCM_CAR (x), SCM_EOL, env); |
6dbd0af5 | 1398 | break; |
c209c88e | 1399 | case SCM_BIT8(SCM_IM_QUOTE): |
2f0d1375 | 1400 | ls = z = scm_cons (scm_sym_quote, SCM_UNSPECIFIED); |
6dbd0af5 | 1401 | break; |
c209c88e | 1402 | case SCM_BIT8(SCM_IM_SET_X): |
89efbff4 | 1403 | ls = z = scm_cons (scm_sym_set_x, SCM_UNSPECIFIED); |
6dbd0af5 | 1404 | break; |
c209c88e | 1405 | case SCM_BIT8(SCM_IM_DEFINE): |
6dbd0af5 MD |
1406 | { |
1407 | SCM n; | |
1408 | x = SCM_CDR (x); | |
2f0d1375 | 1409 | ls = scm_cons (scm_sym_define, |
6dbd0af5 MD |
1410 | z = scm_cons (n = SCM_CAR (x), SCM_UNSPECIFIED)); |
1411 | if (SCM_NNULLP (env)) | |
a23afe53 | 1412 | SCM_SETCAR (SCM_CAR (env), scm_cons (n, SCM_CAR (SCM_CAR (env)))); |
6dbd0af5 MD |
1413 | break; |
1414 | } | |
c209c88e | 1415 | case SCM_BIT8(SCM_MAKISYM (0)): |
6dbd0af5 MD |
1416 | z = SCM_CAR (x); |
1417 | if (!SCM_ISYMP (z)) | |
1418 | goto unmemo; | |
ff467021 | 1419 | switch (SCM_ISYMNUM (z)) |
6dbd0af5 MD |
1420 | { |
1421 | case (SCM_ISYMNUM (SCM_IM_APPLY)): | |
2f0d1375 | 1422 | ls = z = scm_cons (scm_sym_atapply, SCM_UNSPECIFIED); |
6dbd0af5 MD |
1423 | goto loop; |
1424 | case (SCM_ISYMNUM (SCM_IM_CONT)): | |
2f0d1375 | 1425 | ls = z = scm_cons (scm_sym_atcall_cc, SCM_UNSPECIFIED); |
6dbd0af5 | 1426 | goto loop; |
a570e93a MD |
1427 | case (SCM_ISYMNUM (SCM_IM_DELAY)): |
1428 | ls = z = scm_cons (scm_sym_delay, SCM_UNSPECIFIED); | |
1429 | x = SCM_CDR (x); | |
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 | { | |
1492 | SCM formals = SCM_CAR (SCM_CODE (closure)); | |
1493 | while (SCM_NIMP (formals)) | |
1494 | { | |
1495 | if (SCM_NCONSP (formals)) | |
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; |
6dbd0af5 MD |
1510 | while (SCM_NIMP (l)) |
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 |
680ed4a8 MD |
1538 | if (SCM_NNULLP (l)) |
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; |
0f2d19dd JB |
1733 | while (SCM_NIMP (l)) |
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 |
680ed4a8 MD |
1761 | if (SCM_NNULLP (l)) |
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. */ | |
1943 | if (SCM_CONSP(env) && !SCM_CONSP(SCM_CAR(env))) | |
1944 | { | |
1945 | t.arg1 = x; | |
d9d39d76 | 1946 | UPDATE_TOPLEVEL_ENV (env); |
4163eb72 MV |
1947 | while (SCM_NNULLP (t.arg1 = SCM_CDR (t.arg1))) |
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; | |
1964 | while (SCM_NNULLP (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 |
5280aaca | 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 JB |
1981 | carloop: /* scm_eval car of last form in list */ |
1982 | if (SCM_NCELLP (SCM_CAR (x))) | |
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): |
0f2d19dd JB |
2026 | while (SCM_NIMP (x = SCM_CDR (x))) |
2027 | { | |
2028 | proc = SCM_CAR (x); | |
2029 | t.arg1 = EVALCAR (proc, env); | |
2030 | if (SCM_NFALSEP (t.arg1)) | |
2031 | { | |
2032 | x = SCM_CDR (proc); | |
6dbd0af5 | 2033 | if SCM_NULLP (x) |
0f2d19dd | 2034 | { |
6dbd0af5 | 2035 | RETURN (t.arg1) |
0f2d19dd | 2036 | } |
cf498326 | 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; | |
2147 | while (SCM_NNULLP (t.arg1 = SCM_CDR (t.arg1))) | |
2148 | { | |
2149 | x = EVALCAR (x, env); | |
2150 | if (SCM_NFALSEP (x)) | |
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); | |
6dbd0af5 MD |
2213 | #ifdef DEVAL |
2214 | debug.info->a.args = t.arg1; | |
2215 | #endif | |
cf7c17e9 | 2216 | #ifndef SCM_RECKLESS |
0f2d19dd JB |
2217 | if (scm_badargsp (SCM_CAR (SCM_CODE (proc)), t.arg1)) |
2218 | goto wrongnumargs; | |
2219 | #endif | |
c79450dd | 2220 | ENTER_APPLY; |
1609038c MD |
2221 | /* Copy argument list */ |
2222 | if (SCM_IMP (t.arg1)) | |
2223 | argl = t.arg1; | |
2224 | else | |
2225 | { | |
2226 | argl = tl = scm_cons (SCM_CAR (t.arg1), SCM_UNSPECIFIED); | |
2227 | while (SCM_NIMP (t.arg1 = SCM_CDR (t.arg1)) | |
2228 | && SCM_CONSP (t.arg1)) | |
2229 | { | |
2230 | SCM_SETCDR (tl, scm_cons (SCM_CAR (t.arg1), | |
2231 | SCM_UNSPECIFIED)); | |
2232 | tl = SCM_CDR (tl); | |
2233 | } | |
2234 | SCM_SETCDR (tl, t.arg1); | |
2235 | } | |
2236 | ||
2237 | env = EXTEND_ENV (SCM_CAR (SCM_CODE (proc)), argl, SCM_ENV (proc)); | |
0f2d19dd | 2238 | x = SCM_CODE (proc); |
5280aaca | 2239 | goto nontoplevel_cdrxbegin; |
0f2d19dd | 2240 | } |
81123e6d | 2241 | proc = scm_f_apply; |
0f2d19dd JB |
2242 | goto evapply; |
2243 | ||
2244 | case (SCM_ISYMNUM (SCM_IM_CONT)): | |
5f144b10 GH |
2245 | { |
2246 | int first; | |
2247 | SCM val = scm_make_continuation (&first); | |
2248 | ||
2249 | if (first) | |
2250 | t.arg1 = val; | |
2251 | else | |
2252 | RETURN (val); | |
2253 | } | |
0f2d19dd JB |
2254 | proc = SCM_CDR (x); |
2255 | proc = evalcar (proc, env); | |
2256 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
6dbd0af5 MD |
2257 | PREP_APPLY (proc, scm_cons (t.arg1, SCM_EOL)); |
2258 | ENTER_APPLY; | |
a820af98 | 2259 | if (SCM_CLOSUREP(proc) && scm_badformalsp (proc, 1)) |
e37a4fba | 2260 | goto umwrongnumargs; |
0f2d19dd JB |
2261 | goto evap1; |
2262 | ||
a570e93a MD |
2263 | case (SCM_ISYMNUM (SCM_IM_DELAY)): |
2264 | RETURN (scm_makprom (scm_closure (SCM_CDR (x), env))) | |
2265 | ||
89efbff4 | 2266 | case (SCM_ISYMNUM (SCM_IM_DISPATCH)): |
195847fa MD |
2267 | proc = SCM_CADR (x); /* unevaluated operands */ |
2268 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2269 | if (SCM_IMP (proc)) | |
2270 | arg2 = *scm_ilookup (proc, env); | |
2271 | else if (SCM_NCONSP (proc)) | |
2272 | { | |
2273 | if (SCM_NCELLP (proc)) | |
2274 | arg2 = SCM_GLOC_VAL (proc); | |
2275 | else | |
2276 | arg2 = *scm_lookupcar (SCM_CDR (x), env, 1); | |
2277 | } | |
2278 | else | |
2279 | { | |
2280 | arg2 = scm_cons (EVALCAR (proc, env), SCM_EOL); | |
2281 | t.lloc = SCM_CDRLOC (arg2); | |
2282 | while (SCM_NIMP (proc = SCM_CDR (proc))) | |
2283 | { | |
2284 | *t.lloc = scm_cons (EVALCAR (proc, env), SCM_EOL); | |
2285 | t.lloc = SCM_CDRLOC (*t.lloc); | |
2286 | } | |
2287 | } | |
2288 | ||
2289 | type_dispatch: | |
61364ba6 MD |
2290 | /* The type dispatch code is duplicated here |
2291 | * (c.f. objects.c:scm_mcache_compute_cmethod) since that | |
2292 | * cuts down execution time for type dispatch to 50%. | |
2293 | */ | |
2294 | { | |
2295 | int i, n, end, mask; | |
2296 | SCM z = SCM_CDDR (x); | |
2297 | n = SCM_INUM (SCM_CAR (z)); /* maximum number of specializers */ | |
2298 | proc = SCM_CADR (z); | |
2299 | ||
2300 | if (SCM_NIMP (proc)) | |
2301 | { | |
2302 | /* Prepare for linear search */ | |
2303 | mask = -1; | |
2304 | i = 0; | |
b5c2579a | 2305 | end = SCM_VECTOR_LENGTH (proc); |
61364ba6 MD |
2306 | } |
2307 | else | |
2308 | { | |
2309 | /* Compute a hash value */ | |
2310 | int hashset = SCM_INUM (proc); | |
2311 | int j = n; | |
2312 | mask = SCM_INUM (SCM_CAR (z = SCM_CDDR (z))); | |
2313 | proc = SCM_CADR (z); | |
2314 | i = 0; | |
2315 | t.arg1 = arg2; | |
2316 | if (SCM_NIMP (t.arg1)) | |
2317 | do | |
2318 | { | |
d8c40b9f DH |
2319 | i += SCM_STRUCT_DATA (scm_class_of (SCM_CAR (t.arg1))) |
2320 | [scm_si_hashsets + hashset]; | |
61364ba6 MD |
2321 | t.arg1 = SCM_CDR (t.arg1); |
2322 | } | |
4ea6a431 | 2323 | while (j-- && SCM_NIMP (t.arg1)); |
61364ba6 MD |
2324 | i &= mask; |
2325 | end = i; | |
2326 | } | |
2327 | ||
2328 | /* Search for match */ | |
2329 | do | |
2330 | { | |
2331 | int j = n; | |
2332 | z = SCM_VELTS (proc)[i]; | |
2333 | t.arg1 = arg2; /* list of arguments */ | |
2334 | if (SCM_NIMP (t.arg1)) | |
2335 | do | |
2336 | { | |
2337 | /* More arguments than specifiers => CLASS != ENV */ | |
cf498326 | 2338 | if (! SCM_EQ_P (scm_class_of (SCM_CAR (t.arg1)), SCM_CAR (z))) |
61364ba6 MD |
2339 | goto next_method; |
2340 | t.arg1 = SCM_CDR (t.arg1); | |
2341 | z = SCM_CDR (z); | |
2342 | } | |
4ea6a431 | 2343 | while (j-- && SCM_NIMP (t.arg1)); |
61364ba6 MD |
2344 | /* Fewer arguments than specifiers => CAR != ENV */ |
2345 | if (!(SCM_IMP (SCM_CAR (z)) || SCM_CONSP (SCM_CAR (z)))) | |
2346 | goto next_method; | |
2347 | apply_cmethod: | |
2348 | env = EXTEND_ENV (SCM_CAR (SCM_CMETHOD_CODE (z)), | |
2349 | arg2, | |
2350 | SCM_CMETHOD_ENV (z)); | |
2351 | x = SCM_CMETHOD_CODE (z); | |
5280aaca | 2352 | goto nontoplevel_cdrxbegin; |
61364ba6 MD |
2353 | next_method: |
2354 | i = (i + 1) & mask; | |
2355 | } while (i != end); | |
2356 | ||
2357 | z = scm_memoize_method (x, arg2); | |
2358 | goto apply_cmethod; | |
2359 | } | |
73b64342 | 2360 | |
ca4be6ea MD |
2361 | case (SCM_ISYMNUM (SCM_IM_SLOT_REF)): |
2362 | x = SCM_CDR (x); | |
2363 | t.arg1 = EVALCAR (x, env); | |
d8c40b9f | 2364 | RETURN (SCM_PACK (SCM_STRUCT_DATA (t.arg1) [SCM_INUM (SCM_CADR (x))])) |
ca4be6ea MD |
2365 | |
2366 | case (SCM_ISYMNUM (SCM_IM_SLOT_SET_X)): | |
2367 | x = SCM_CDR (x); | |
2368 | t.arg1 = EVALCAR (x, env); | |
2369 | x = SCM_CDR (x); | |
2370 | proc = SCM_CDR (x); | |
d8c40b9f DH |
2371 | SCM_STRUCT_DATA (t.arg1) [SCM_INUM (SCM_CAR (x))] |
2372 | = SCM_UNPACK (EVALCAR (proc, env)); | |
5623a9b4 | 2373 | RETURN (SCM_UNSPECIFIED) |
ca4be6ea | 2374 | |
73b64342 MD |
2375 | case (SCM_ISYMNUM (SCM_IM_NIL_COND)): |
2376 | proc = SCM_CDR (x); | |
2377 | while (SCM_NIMP (x = SCM_CDR (proc))) | |
2378 | { | |
2379 | if (!(SCM_FALSEP (t.arg1 = EVALCAR (proc, env)) | |
3201d763 | 2380 | || SCM_EQ_P (t.arg1, scm_lisp_nil))) |
73b64342 | 2381 | { |
cf498326 | 2382 | if (SCM_EQ_P (SCM_CAR (x), SCM_UNSPECIFIED)) |
73b64342 MD |
2383 | RETURN (t.arg1); |
2384 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2385 | goto carloop; | |
2386 | } | |
2387 | proc = SCM_CDR (x); | |
2388 | } | |
2389 | x = proc; | |
2390 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2391 | goto carloop; | |
2392 | ||
2393 | case (SCM_ISYMNUM (SCM_IM_NIL_IFY)): | |
2394 | x = SCM_CDR (x); | |
2395 | RETURN ((SCM_FALSEP (proc = EVALCAR (x, env)) || SCM_NULLP (proc)) | |
43a912cf | 2396 | ? scm_lisp_nil |
73b64342 MD |
2397 | : proc) |
2398 | ||
2399 | case (SCM_ISYMNUM (SCM_IM_T_IFY)): | |
2400 | x = SCM_CDR (x); | |
43a912cf | 2401 | RETURN (SCM_NFALSEP (EVALCAR (x, env)) ? scm_lisp_t : scm_lisp_nil) |
73b64342 MD |
2402 | |
2403 | case (SCM_ISYMNUM (SCM_IM_0_COND)): | |
2404 | proc = SCM_CDR (x); | |
2405 | while (SCM_NIMP (x = SCM_CDR (proc))) | |
2406 | { | |
2407 | if (!(SCM_FALSEP (t.arg1 = EVALCAR (proc, env)) | |
3201d763 | 2408 | || SCM_EQ_P (t.arg1, SCM_INUM0))) |
73b64342 | 2409 | { |
cf498326 | 2410 | if (SCM_EQ_P (SCM_CAR (x), SCM_UNSPECIFIED)) |
73b64342 MD |
2411 | RETURN (t.arg1); |
2412 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2413 | goto carloop; | |
2414 | } | |
2415 | proc = SCM_CDR (x); | |
2416 | } | |
2417 | x = proc; | |
2418 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2419 | goto carloop; | |
2420 | ||
2421 | case (SCM_ISYMNUM (SCM_IM_0_IFY)): | |
2422 | x = SCM_CDR (x); | |
2423 | RETURN (SCM_FALSEP (proc = EVALCAR (x, env)) | |
2424 | ? SCM_INUM0 | |
2425 | : proc) | |
2426 | ||
2427 | case (SCM_ISYMNUM (SCM_IM_1_IFY)): | |
2428 | x = SCM_CDR (x); | |
2429 | RETURN (SCM_NFALSEP (EVALCAR (x, env)) | |
2430 | ? SCM_MAKINUM (1) | |
2431 | : SCM_INUM0) | |
2432 | ||
2433 | case (SCM_ISYMNUM (SCM_IM_BIND)): | |
2434 | x = SCM_CDR (x); | |
2435 | ||
2436 | t.arg1 = SCM_CAR (x); | |
2437 | arg2 = SCM_CDAR (env); | |
2438 | while (SCM_NIMP (arg2)) | |
2439 | { | |
2440 | proc = SCM_GLOC_VAL (SCM_CAR (t.arg1)); | |
a963f787 MD |
2441 | SCM_SETCDR (SCM_PACK (SCM_UNPACK (SCM_CAR (t.arg1)) - 1L), |
2442 | SCM_CAR (arg2)); | |
73b64342 MD |
2443 | SCM_SETCAR (arg2, proc); |
2444 | t.arg1 = SCM_CDR (t.arg1); | |
2445 | arg2 = SCM_CDR (arg2); | |
2446 | } | |
2447 | t.arg1 = SCM_CAR (x); | |
2448 | scm_dynwinds = scm_acons (t.arg1, SCM_CDAR (env), scm_dynwinds); | |
89efbff4 | 2449 | |
73b64342 MD |
2450 | arg2 = x = SCM_CDR (x); |
2451 | while (SCM_NNULLP (arg2 = SCM_CDR (arg2))) | |
2452 | { | |
2453 | SIDEVAL (SCM_CAR (x), env); | |
2454 | x = arg2; | |
2455 | } | |
2456 | proc = EVALCAR (x, env); | |
2457 | ||
2458 | scm_dynwinds = SCM_CDR (scm_dynwinds); | |
2459 | arg2 = SCM_CDAR (env); | |
2460 | while (SCM_NIMP (arg2)) | |
2461 | { | |
a963f787 MD |
2462 | SCM_SETCDR (SCM_PACK (SCM_UNPACK (SCM_CAR (t.arg1)) - 1L), |
2463 | SCM_CAR (arg2)); | |
73b64342 MD |
2464 | t.arg1 = SCM_CDR (t.arg1); |
2465 | arg2 = SCM_CDR (arg2); | |
2466 | } | |
2467 | ||
2468 | RETURN (proc) | |
2469 | ||
0f2d19dd JB |
2470 | default: |
2471 | goto badfun; | |
2472 | } | |
2473 | ||
2474 | default: | |
2475 | proc = x; | |
2476 | badfun: | |
f5bf2977 | 2477 | /* scm_everr (x, env,...) */ |
e0c08f17 | 2478 | scm_misc_error (NULL, "Wrong type to apply: ~S", SCM_LIST1 (proc)); |
0f2d19dd JB |
2479 | case scm_tc7_vector: |
2480 | case scm_tc7_wvect: | |
afe5177e | 2481 | #ifdef HAVE_ARRAYS |
0f2d19dd JB |
2482 | case scm_tc7_bvect: |
2483 | case scm_tc7_byvect: | |
2484 | case scm_tc7_svect: | |
2485 | case scm_tc7_ivect: | |
2486 | case scm_tc7_uvect: | |
2487 | case scm_tc7_fvect: | |
2488 | case scm_tc7_dvect: | |
2489 | case scm_tc7_cvect: | |
5c11cc9d | 2490 | #ifdef HAVE_LONG_LONGS |
0f2d19dd | 2491 | case scm_tc7_llvect: |
afe5177e | 2492 | #endif |
0f2d19dd JB |
2493 | #endif |
2494 | case scm_tc7_string: | |
0f2d19dd | 2495 | case scm_tc7_substring: |
0f2d19dd JB |
2496 | case scm_tc7_smob: |
2497 | case scm_tcs_closures: | |
224822be | 2498 | case scm_tc7_cclo: |
89efbff4 | 2499 | case scm_tc7_pws: |
0f2d19dd JB |
2500 | case scm_tcs_subrs: |
2501 | RETURN (x); | |
2502 | ||
2503 | #ifdef MEMOIZE_LOCALS | |
c209c88e | 2504 | case SCM_BIT8(SCM_ILOC00): |
0f2d19dd JB |
2505 | proc = *scm_ilookup (SCM_CAR (x), env); |
2506 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
cf7c17e9 JB |
2507 | #ifndef SCM_RECKLESS |
2508 | #ifdef SCM_CAUTIOUS | |
0f2d19dd JB |
2509 | goto checkargs; |
2510 | #endif | |
2511 | #endif | |
2512 | break; | |
2513 | #endif /* ifdef MEMOIZE_LOCALS */ | |
2514 | ||
2515 | ||
3201d763 DH |
2516 | case scm_tcs_cons_gloc: { |
2517 | scm_bits_t vcell = SCM_STRUCT_VTABLE_DATA (x) [scm_vtable_index_vcell]; | |
2518 | if (vcell == 0) { | |
aa00bd1e MD |
2519 | /* This is a struct implanted in the code, not a gloc. */ |
2520 | RETURN (x); | |
3201d763 DH |
2521 | } else { |
2522 | proc = SCM_PACK (vcell); | |
2523 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
cf7c17e9 JB |
2524 | #ifndef SCM_RECKLESS |
2525 | #ifdef SCM_CAUTIOUS | |
3201d763 | 2526 | goto checkargs; |
0f2d19dd JB |
2527 | #endif |
2528 | #endif | |
3201d763 | 2529 | } |
0f2d19dd | 2530 | break; |
3201d763 | 2531 | } |
0f2d19dd JB |
2532 | |
2533 | case scm_tcs_cons_nimcar: | |
2534 | if (SCM_SYMBOLP (SCM_CAR (x))) | |
2535 | { | |
f8769b1d | 2536 | #ifdef USE_THREADS |
26d5b9b4 | 2537 | t.lloc = scm_lookupcar1 (x, env, 1); |
f8769b1d MV |
2538 | if (t.lloc == NULL) |
2539 | { | |
2540 | /* we have lost the race, start again. */ | |
2541 | goto dispatch; | |
2542 | } | |
2543 | proc = *t.lloc; | |
2544 | #else | |
26d5b9b4 | 2545 | proc = *scm_lookupcar (x, env, 1); |
f8769b1d MV |
2546 | #endif |
2547 | ||
0f2d19dd JB |
2548 | if (SCM_IMP (proc)) |
2549 | { | |
2550 | unmemocar (x, env); | |
2551 | goto badfun; | |
2552 | } | |
2553 | if (scm_tc16_macro == SCM_TYP16 (proc)) | |
2554 | { | |
2555 | unmemocar (x, env); | |
2556 | ||
2557 | handle_a_macro: | |
368bf056 | 2558 | #ifdef DEVAL |
7c354052 MD |
2559 | /* Set a flag during macro expansion so that macro |
2560 | application frames can be deleted from the backtrace. */ | |
2561 | SCM_SET_MACROEXP (debug); | |
368bf056 | 2562 | #endif |
f8769b1d MV |
2563 | t.arg1 = SCM_APPLY (SCM_CDR (proc), x, |
2564 | scm_cons (env, scm_listofnull)); | |
2565 | ||
7c354052 MD |
2566 | #ifdef DEVAL |
2567 | SCM_CLEAR_MACROEXP (debug); | |
2568 | #endif | |
445f675c | 2569 | switch (SCM_CELL_WORD_0 (proc) >> 16) |
0f2d19dd JB |
2570 | { |
2571 | case 2: | |
2572 | if (scm_ilength (t.arg1) <= 0) | |
2573 | t.arg1 = scm_cons2 (SCM_IM_BEGIN, t.arg1, SCM_EOL); | |
6dbd0af5 MD |
2574 | #ifdef DEVAL |
2575 | if (!SCM_CLOSUREP (SCM_CDR (proc))) | |
2576 | { | |
6dbd0af5 | 2577 | SCM_DEFER_INTS; |
a23afe53 MD |
2578 | SCM_SETCAR (x, SCM_CAR (t.arg1)); |
2579 | SCM_SETCDR (x, SCM_CDR (t.arg1)); | |
6dbd0af5 MD |
2580 | SCM_ALLOW_INTS; |
2581 | goto dispatch; | |
2582 | } | |
2583 | /* Prevent memoizing of debug info expression. */ | |
6203706f MD |
2584 | debug.info->e.exp = scm_cons_source (debug.info->e.exp, |
2585 | SCM_CAR (x), | |
2586 | SCM_CDR (x)); | |
6dbd0af5 | 2587 | #endif |
0f2d19dd | 2588 | SCM_DEFER_INTS; |
a23afe53 MD |
2589 | SCM_SETCAR (x, SCM_CAR (t.arg1)); |
2590 | SCM_SETCDR (x, SCM_CDR (t.arg1)); | |
0f2d19dd | 2591 | SCM_ALLOW_INTS; |
6dbd0af5 | 2592 | goto loopnoap; |
0f2d19dd JB |
2593 | case 1: |
2594 | if (SCM_NIMP (x = t.arg1)) | |
6dbd0af5 | 2595 | goto loopnoap; |
0f2d19dd JB |
2596 | case 0: |
2597 | RETURN (t.arg1); | |
2598 | } | |
2599 | } | |
2600 | } | |
2601 | else | |
2602 | proc = SCM_CEVAL (SCM_CAR (x), env); | |
2603 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
cf7c17e9 JB |
2604 | #ifndef SCM_RECKLESS |
2605 | #ifdef SCM_CAUTIOUS | |
0f2d19dd JB |
2606 | checkargs: |
2607 | #endif | |
2608 | if (SCM_CLOSUREP (proc)) | |
2609 | { | |
2610 | arg2 = SCM_CAR (SCM_CODE (proc)); | |
2611 | t.arg1 = SCM_CDR (x); | |
2612 | while (SCM_NIMP (arg2)) | |
2613 | { | |
2614 | if (SCM_NCONSP (arg2)) | |
2615 | goto evapply; | |
2616 | if (SCM_IMP (t.arg1)) | |
2617 | goto umwrongnumargs; | |
2618 | arg2 = SCM_CDR (arg2); | |
2619 | t.arg1 = SCM_CDR (t.arg1); | |
2620 | } | |
2621 | if (SCM_NNULLP (t.arg1)) | |
2622 | goto umwrongnumargs; | |
2623 | } | |
2624 | else if (scm_tc16_macro == SCM_TYP16 (proc)) | |
2625 | goto handle_a_macro; | |
2626 | #endif | |
2627 | } | |
2628 | ||
2629 | ||
6dbd0af5 MD |
2630 | evapply: |
2631 | PREP_APPLY (proc, SCM_EOL); | |
2632 | if (SCM_NULLP (SCM_CDR (x))) { | |
2633 | ENTER_APPLY; | |
89efbff4 | 2634 | evap0: |
0f2d19dd JB |
2635 | switch (SCM_TYP7 (proc)) |
2636 | { /* no arguments given */ | |
2637 | case scm_tc7_subr_0: | |
2638 | RETURN (SCM_SUBRF (proc) ()); | |
2639 | case scm_tc7_subr_1o: | |
2640 | RETURN (SCM_SUBRF (proc) (SCM_UNDEFINED)); | |
2641 | case scm_tc7_lsubr: | |
2642 | RETURN (SCM_SUBRF (proc) (SCM_EOL)); | |
2643 | case scm_tc7_rpsubr: | |
2644 | RETURN (SCM_BOOL_T); | |
2645 | case scm_tc7_asubr: | |
2646 | RETURN (SCM_SUBRF (proc) (SCM_UNDEFINED, SCM_UNDEFINED)); | |
0717dfd8 | 2647 | case scm_tc7_smob: |
68b06924 | 2648 | if (!SCM_SMOB_APPLICABLE_P (proc)) |
0717dfd8 | 2649 | goto badfun; |
68b06924 | 2650 | RETURN (SCM_SMOB_APPLY_0 (proc)); |
0f2d19dd JB |
2651 | case scm_tc7_cclo: |
2652 | t.arg1 = proc; | |
2653 | proc = SCM_CCLO_SUBR (proc); | |
6dbd0af5 MD |
2654 | #ifdef DEVAL |
2655 | debug.info->a.proc = proc; | |
2656 | debug.info->a.args = scm_cons (t.arg1, SCM_EOL); | |
2657 | #endif | |
0f2d19dd | 2658 | goto evap1; |
89efbff4 MD |
2659 | case scm_tc7_pws: |
2660 | proc = SCM_PROCEDURE (proc); | |
2661 | #ifdef DEVAL | |
2662 | debug.info->a.proc = proc; | |
2663 | #endif | |
002f1a5d MD |
2664 | if (!SCM_CLOSUREP (proc)) |
2665 | goto evap0; | |
2666 | if (scm_badformalsp (proc, 0)) | |
2667 | goto umwrongnumargs; | |
0f2d19dd JB |
2668 | case scm_tcs_closures: |
2669 | x = SCM_CODE (proc); | |
e2806c10 | 2670 | env = EXTEND_ENV (SCM_CAR (x), SCM_EOL, SCM_ENV (proc)); |
5280aaca | 2671 | goto nontoplevel_cdrxbegin; |
da7f71d7 | 2672 | case scm_tcs_cons_gloc: |
195847fa MD |
2673 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) |
2674 | { | |
2675 | x = SCM_ENTITY_PROCEDURE (proc); | |
2676 | arg2 = SCM_EOL; | |
2677 | goto type_dispatch; | |
2678 | } | |
2679 | else if (!SCM_I_OPERATORP (proc)) | |
9b07e212 MD |
2680 | goto badfun; |
2681 | else | |
da7f71d7 | 2682 | { |
195847fa MD |
2683 | t.arg1 = proc; |
2684 | proc = (SCM_I_ENTITYP (proc) | |
2685 | ? SCM_ENTITY_PROCEDURE (proc) | |
2686 | : SCM_OPERATOR_PROCEDURE (proc)); | |
da7f71d7 | 2687 | #ifdef DEVAL |
195847fa MD |
2688 | debug.info->a.proc = proc; |
2689 | debug.info->a.args = scm_cons (t.arg1, SCM_EOL); | |
da7f71d7 | 2690 | #endif |
195847fa MD |
2691 | if (SCM_NIMP (proc)) |
2692 | goto evap1; | |
2693 | else | |
2694 | goto badfun; | |
da7f71d7 | 2695 | } |
0f2d19dd JB |
2696 | case scm_tc7_subr_1: |
2697 | case scm_tc7_subr_2: | |
2698 | case scm_tc7_subr_2o: | |
2699 | case scm_tc7_cxr: | |
2700 | case scm_tc7_subr_3: | |
2701 | case scm_tc7_lsubr_2: | |
2702 | umwrongnumargs: | |
2703 | unmemocar (x, env); | |
2704 | wrongnumargs: | |
f5bf2977 GH |
2705 | /* scm_everr (x, env,...) */ |
2706 | scm_wrong_num_args (proc); | |
0f2d19dd JB |
2707 | default: |
2708 | /* handle macros here */ | |
2709 | goto badfun; | |
2710 | } | |
6dbd0af5 | 2711 | } |
0f2d19dd JB |
2712 | |
2713 | /* must handle macros by here */ | |
2714 | x = SCM_CDR (x); | |
cf7c17e9 | 2715 | #ifdef SCM_CAUTIOUS |
0f2d19dd JB |
2716 | if (SCM_IMP (x)) |
2717 | goto wrongnumargs; | |
680ed4a8 MD |
2718 | else if (SCM_CONSP (x)) |
2719 | { | |
2720 | if (SCM_IMP (SCM_CAR (x))) | |
6cb702da | 2721 | t.arg1 = SCM_EVALIM (SCM_CAR (x), env); |
680ed4a8 MD |
2722 | else |
2723 | t.arg1 = EVALCELLCAR (x, env); | |
2724 | } | |
3201d763 | 2725 | else if (SCM_TYP3 (x) == scm_tc3_cons_gloc) |
680ed4a8 | 2726 | { |
3201d763 DH |
2727 | scm_bits_t vcell = SCM_STRUCT_VTABLE_DATA (x) [scm_vtable_index_vcell]; |
2728 | if (vcell == 0) | |
680ed4a8 | 2729 | t.arg1 = SCM_CAR (x); /* struct planted in code */ |
3201d763 DH |
2730 | else |
2731 | t.arg1 = SCM_PACK (vcell); | |
680ed4a8 MD |
2732 | } |
2733 | else | |
2734 | goto wrongnumargs; | |
2735 | #else | |
0f2d19dd | 2736 | t.arg1 = EVALCAR (x, env); |
680ed4a8 | 2737 | #endif |
6dbd0af5 MD |
2738 | #ifdef DEVAL |
2739 | debug.info->a.args = scm_cons (t.arg1, SCM_EOL); | |
2740 | #endif | |
0f2d19dd JB |
2741 | x = SCM_CDR (x); |
2742 | if (SCM_NULLP (x)) | |
2743 | { | |
6dbd0af5 | 2744 | ENTER_APPLY; |
0f2d19dd JB |
2745 | evap1: |
2746 | switch (SCM_TYP7 (proc)) | |
6dbd0af5 | 2747 | { /* have one argument in t.arg1 */ |
0f2d19dd JB |
2748 | case scm_tc7_subr_2o: |
2749 | RETURN (SCM_SUBRF (proc) (t.arg1, SCM_UNDEFINED)); | |
2750 | case scm_tc7_subr_1: | |
2751 | case scm_tc7_subr_1o: | |
2752 | RETURN (SCM_SUBRF (proc) (t.arg1)); | |
2753 | case scm_tc7_cxr: | |
0f2d19dd JB |
2754 | if (SCM_SUBRF (proc)) |
2755 | { | |
2756 | if (SCM_INUMP (t.arg1)) | |
2757 | { | |
f8de44c1 | 2758 | RETURN (scm_make_real (SCM_DSUBRF (proc) ((double) SCM_INUM (t.arg1)))); |
0f2d19dd JB |
2759 | } |
2760 | SCM_ASRTGO (SCM_NIMP (t.arg1), floerr); | |
2761 | if (SCM_REALP (t.arg1)) | |
2762 | { | |
eb42e2f0 | 2763 | RETURN (scm_make_real (SCM_DSUBRF (proc) (SCM_REAL_VALUE (t.arg1)))); |
0f2d19dd JB |
2764 | } |
2765 | #ifdef SCM_BIGDIG | |
2766 | if (SCM_BIGP (t.arg1)) | |
2767 | { | |
f8de44c1 | 2768 | RETURN (scm_make_real (SCM_DSUBRF (proc) (scm_big2dbl (t.arg1)))); |
0f2d19dd JB |
2769 | } |
2770 | #endif | |
2771 | floerr: | |
9de33deb | 2772 | SCM_WTA_DISPATCH_1 (*SCM_SUBR_GENERIC (proc), t.arg1, |
3db4adfc | 2773 | SCM_ARG1, SCM_SYMBOL_CHARS (SCM_SNAME (proc))); |
0f2d19dd | 2774 | } |
3201d763 | 2775 | proc = SCM_SNAME (proc); |
0f2d19dd | 2776 | { |
b5c2579a | 2777 | char *chrs = SCM_SYMBOL_CHARS (proc) + SCM_SYMBOL_LENGTH (proc) - 1; |
0f2d19dd JB |
2778 | while ('c' != *--chrs) |
2779 | { | |
0c95b57d | 2780 | SCM_ASSERT (SCM_CONSP (t.arg1), |
3db4adfc | 2781 | t.arg1, SCM_ARG1, SCM_SYMBOL_CHARS (proc)); |
0f2d19dd JB |
2782 | t.arg1 = ('a' == *chrs) ? SCM_CAR (t.arg1) : SCM_CDR (t.arg1); |
2783 | } | |
2784 | RETURN (t.arg1); | |
2785 | } | |
2786 | case scm_tc7_rpsubr: | |
2787 | RETURN (SCM_BOOL_T); | |
2788 | case scm_tc7_asubr: | |
2789 | RETURN (SCM_SUBRF (proc) (t.arg1, SCM_UNDEFINED)); | |
2790 | case scm_tc7_lsubr: | |
2791 | #ifdef DEVAL | |
6dbd0af5 | 2792 | RETURN (SCM_SUBRF (proc) (debug.info->a.args)) |
0f2d19dd JB |
2793 | #else |
2794 | RETURN (SCM_SUBRF (proc) (scm_cons (t.arg1, SCM_EOL))); | |
2795 | #endif | |
0717dfd8 | 2796 | case scm_tc7_smob: |
68b06924 | 2797 | if (!SCM_SMOB_APPLICABLE_P (proc)) |
0717dfd8 | 2798 | goto badfun; |
68b06924 | 2799 | RETURN (SCM_SMOB_APPLY_1 (proc, t.arg1)); |
0f2d19dd JB |
2800 | case scm_tc7_cclo: |
2801 | arg2 = t.arg1; | |
2802 | t.arg1 = proc; | |
2803 | proc = SCM_CCLO_SUBR (proc); | |
6dbd0af5 MD |
2804 | #ifdef DEVAL |
2805 | debug.info->a.args = scm_cons (t.arg1, debug.info->a.args); | |
2806 | debug.info->a.proc = proc; | |
2807 | #endif | |
0f2d19dd | 2808 | goto evap2; |
89efbff4 MD |
2809 | case scm_tc7_pws: |
2810 | proc = SCM_PROCEDURE (proc); | |
2811 | #ifdef DEVAL | |
2812 | debug.info->a.proc = proc; | |
2813 | #endif | |
002f1a5d MD |
2814 | if (!SCM_CLOSUREP (proc)) |
2815 | goto evap1; | |
2816 | if (scm_badformalsp (proc, 1)) | |
2817 | goto umwrongnumargs; | |
0f2d19dd | 2818 | case scm_tcs_closures: |
195847fa | 2819 | /* clos1: */ |
0f2d19dd JB |
2820 | x = SCM_CODE (proc); |
2821 | #ifdef DEVAL | |
e2806c10 | 2822 | env = EXTEND_ENV (SCM_CAR (x), debug.info->a.args, SCM_ENV (proc)); |
0f2d19dd | 2823 | #else |
e2806c10 | 2824 | env = EXTEND_ENV (SCM_CAR (x), scm_cons (t.arg1, SCM_EOL), SCM_ENV (proc)); |
0f2d19dd | 2825 | #endif |
5280aaca | 2826 | goto nontoplevel_cdrxbegin; |
0c32d76c | 2827 | case scm_tcs_cons_gloc: |
f3d2630a MD |
2828 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) |
2829 | { | |
195847fa | 2830 | x = SCM_ENTITY_PROCEDURE (proc); |
f3d2630a MD |
2831 | #ifdef DEVAL |
2832 | arg2 = debug.info->a.args; | |
2833 | #else | |
2834 | arg2 = scm_cons (t.arg1, SCM_EOL); | |
2835 | #endif | |
f3d2630a MD |
2836 | goto type_dispatch; |
2837 | } | |
2838 | else if (!SCM_I_OPERATORP (proc)) | |
9b07e212 MD |
2839 | goto badfun; |
2840 | else | |
0c32d76c | 2841 | { |
195847fa MD |
2842 | arg2 = t.arg1; |
2843 | t.arg1 = proc; | |
2844 | proc = (SCM_I_ENTITYP (proc) | |
2845 | ? SCM_ENTITY_PROCEDURE (proc) | |
2846 | : SCM_OPERATOR_PROCEDURE (proc)); | |
0c32d76c | 2847 | #ifdef DEVAL |
195847fa MD |
2848 | debug.info->a.args = scm_cons (t.arg1, debug.info->a.args); |
2849 | debug.info->a.proc = proc; | |
0c32d76c | 2850 | #endif |
195847fa MD |
2851 | if (SCM_NIMP (proc)) |
2852 | goto evap2; | |
2853 | else | |
2854 | goto badfun; | |
0c32d76c | 2855 | } |
0f2d19dd JB |
2856 | case scm_tc7_subr_2: |
2857 | case scm_tc7_subr_0: | |
2858 | case scm_tc7_subr_3: | |
2859 | case scm_tc7_lsubr_2: | |
2860 | goto wrongnumargs; | |
2861 | default: | |
2862 | goto badfun; | |
2863 | } | |
2864 | } | |
cf7c17e9 | 2865 | #ifdef SCM_CAUTIOUS |
0f2d19dd JB |
2866 | if (SCM_IMP (x)) |
2867 | goto wrongnumargs; | |
680ed4a8 MD |
2868 | else if (SCM_CONSP (x)) |
2869 | { | |
2870 | if (SCM_IMP (SCM_CAR (x))) | |
6cb702da | 2871 | arg2 = SCM_EVALIM (SCM_CAR (x), env); |
680ed4a8 MD |
2872 | else |
2873 | arg2 = EVALCELLCAR (x, env); | |
2874 | } | |
3201d763 | 2875 | else if (SCM_TYP3 (x) == scm_tc3_cons_gloc) |
680ed4a8 | 2876 | { |
3201d763 DH |
2877 | scm_bits_t vcell = SCM_STRUCT_VTABLE_DATA (x) [scm_vtable_index_vcell]; |
2878 | if (vcell == 0) | |
680ed4a8 | 2879 | arg2 = SCM_CAR (x); /* struct planted in code */ |
3201d763 DH |
2880 | else |
2881 | arg2 = SCM_PACK (vcell); | |
680ed4a8 MD |
2882 | } |
2883 | else | |
2884 | goto wrongnumargs; | |
2885 | #else | |
2886 | arg2 = EVALCAR (x, env); | |
0f2d19dd JB |
2887 | #endif |
2888 | { /* have two or more arguments */ | |
6dbd0af5 MD |
2889 | #ifdef DEVAL |
2890 | debug.info->a.args = scm_cons2 (t.arg1, arg2, SCM_EOL); | |
2891 | #endif | |
0f2d19dd JB |
2892 | x = SCM_CDR (x); |
2893 | if (SCM_NULLP (x)) { | |
6dbd0af5 | 2894 | ENTER_APPLY; |
0f2d19dd | 2895 | evap2: |
6dbd0af5 MD |
2896 | switch (SCM_TYP7 (proc)) |
2897 | { /* have two arguments */ | |
2898 | case scm_tc7_subr_2: | |
2899 | case scm_tc7_subr_2o: | |
2900 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2)); | |
2901 | case scm_tc7_lsubr: | |
0f2d19dd | 2902 | #ifdef DEVAL |
6dbd0af5 MD |
2903 | RETURN (SCM_SUBRF (proc) (debug.info->a.args)) |
2904 | #else | |
2905 | RETURN (SCM_SUBRF (proc) (scm_cons2 (t.arg1, arg2, SCM_EOL))); | |
0f2d19dd | 2906 | #endif |
6dbd0af5 MD |
2907 | case scm_tc7_lsubr_2: |
2908 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, SCM_EOL)); | |
2909 | case scm_tc7_rpsubr: | |
2910 | case scm_tc7_asubr: | |
2911 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2)); | |
0717dfd8 | 2912 | case scm_tc7_smob: |
68b06924 | 2913 | if (!SCM_SMOB_APPLICABLE_P (proc)) |
0717dfd8 | 2914 | goto badfun; |
68b06924 | 2915 | RETURN (SCM_SMOB_APPLY_2 (proc, t.arg1, arg2)); |
6dbd0af5 MD |
2916 | cclon: |
2917 | case scm_tc7_cclo: | |
0f2d19dd | 2918 | #ifdef DEVAL |
195847fa MD |
2919 | RETURN (SCM_APPLY (SCM_CCLO_SUBR (proc), |
2920 | scm_cons (proc, debug.info->a.args), | |
2921 | SCM_EOL)); | |
0f2d19dd | 2922 | #else |
195847fa MD |
2923 | RETURN (SCM_APPLY (SCM_CCLO_SUBR (proc), |
2924 | scm_cons2 (proc, t.arg1, | |
2925 | scm_cons (arg2, | |
2926 | scm_eval_args (x, | |
2927 | env, | |
2928 | proc))), | |
2929 | SCM_EOL)); | |
6dbd0af5 | 2930 | #endif |
0c32d76c | 2931 | case scm_tcs_cons_gloc: |
f3d2630a MD |
2932 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) |
2933 | { | |
195847fa | 2934 | x = SCM_ENTITY_PROCEDURE (proc); |
f3d2630a MD |
2935 | #ifdef DEVAL |
2936 | arg2 = debug.info->a.args; | |
2937 | #else | |
2938 | arg2 = scm_cons2 (t.arg1, arg2, SCM_EOL); | |
2939 | #endif | |
f3d2630a MD |
2940 | goto type_dispatch; |
2941 | } | |
2942 | else if (!SCM_I_OPERATORP (proc)) | |
9b07e212 MD |
2943 | goto badfun; |
2944 | else | |
0c32d76c | 2945 | { |
195847fa | 2946 | operatorn: |
0c32d76c | 2947 | #ifdef DEVAL |
195847fa MD |
2948 | RETURN (SCM_APPLY (SCM_I_ENTITYP (proc) |
2949 | ? SCM_ENTITY_PROCEDURE (proc) | |
2950 | : SCM_OPERATOR_PROCEDURE (proc), | |
2951 | scm_cons (proc, debug.info->a.args), | |
2952 | SCM_EOL)); | |
2953 | #else | |
2954 | RETURN (SCM_APPLY (SCM_I_ENTITYP (proc) | |
2955 | ? SCM_ENTITY_PROCEDURE (proc) | |
2956 | : SCM_OPERATOR_PROCEDURE (proc), | |
2957 | scm_cons2 (proc, t.arg1, | |
2958 | scm_cons (arg2, | |
2959 | scm_eval_args (x, | |
2960 | env, | |
2961 | proc))), | |
2962 | SCM_EOL)); | |
2963 | #endif | |
0c32d76c | 2964 | } |
6dbd0af5 MD |
2965 | case scm_tc7_subr_0: |
2966 | case scm_tc7_cxr: | |
2967 | case scm_tc7_subr_1o: | |
2968 | case scm_tc7_subr_1: | |
2969 | case scm_tc7_subr_3: | |
6dbd0af5 MD |
2970 | goto wrongnumargs; |
2971 | default: | |
2972 | goto badfun; | |
002f1a5d MD |
2973 | case scm_tc7_pws: |
2974 | proc = SCM_PROCEDURE (proc); | |
2975 | #ifdef DEVAL | |
2976 | debug.info->a.proc = proc; | |
2977 | #endif | |
2978 | if (!SCM_CLOSUREP (proc)) | |
2979 | goto evap2; | |
2980 | if (scm_badformalsp (proc, 2)) | |
2981 | goto umwrongnumargs; | |
6dbd0af5 | 2982 | case scm_tcs_closures: |
195847fa | 2983 | /* clos2: */ |
0f2d19dd | 2984 | #ifdef DEVAL |
da7f71d7 MD |
2985 | env = EXTEND_ENV (SCM_CAR (SCM_CODE (proc)), |
2986 | debug.info->a.args, | |
2987 | SCM_ENV (proc)); | |
0f2d19dd | 2988 | #else |
da7f71d7 MD |
2989 | env = EXTEND_ENV (SCM_CAR (SCM_CODE (proc)), |
2990 | scm_cons2 (t.arg1, arg2, SCM_EOL), SCM_ENV (proc)); | |
0f2d19dd | 2991 | #endif |
6dbd0af5 | 2992 | x = SCM_CODE (proc); |
5280aaca | 2993 | goto nontoplevel_cdrxbegin; |
6dbd0af5 | 2994 | } |
0f2d19dd | 2995 | } |
cf7c17e9 | 2996 | #ifdef SCM_CAUTIOUS |
680ed4a8 MD |
2997 | if (SCM_IMP (x) || SCM_NECONSP (x)) |
2998 | goto wrongnumargs; | |
2999 | #endif | |
0f2d19dd | 3000 | #ifdef DEVAL |
6dbd0af5 | 3001 | debug.info->a.args = scm_cons2 (t.arg1, arg2, |
680ed4a8 MD |
3002 | scm_deval_args (x, env, proc, |
3003 | SCM_CDRLOC (SCM_CDR (debug.info->a.args)))); | |
0f2d19dd | 3004 | #endif |
6dbd0af5 | 3005 | ENTER_APPLY; |
89efbff4 | 3006 | evap3: |
6dbd0af5 MD |
3007 | switch (SCM_TYP7 (proc)) |
3008 | { /* have 3 or more arguments */ | |
0f2d19dd | 3009 | #ifdef DEVAL |
6dbd0af5 MD |
3010 | case scm_tc7_subr_3: |
3011 | SCM_ASRTGO (SCM_NULLP (SCM_CDR (x)), wrongnumargs); | |
da7f71d7 MD |
3012 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, |
3013 | SCM_CADDR (debug.info->a.args))); | |
6dbd0af5 | 3014 | case scm_tc7_asubr: |
399dedcc MD |
3015 | #ifdef BUILTIN_RPASUBR |
3016 | t.arg1 = SCM_SUBRF(proc)(t.arg1, arg2); | |
3017 | arg2 = SCM_CDR (SCM_CDR (debug.info->a.args)); | |
da7f71d7 MD |
3018 | do |
3019 | { | |
3020 | t.arg1 = SCM_SUBRF(proc)(t.arg1, SCM_CAR (arg2)); | |
3021 | arg2 = SCM_CDR (arg2); | |
3022 | } | |
3023 | while (SCM_NIMP (arg2)); | |
399dedcc MD |
3024 | RETURN (t.arg1) |
3025 | #endif /* BUILTIN_RPASUBR */ | |
6dbd0af5 | 3026 | case scm_tc7_rpsubr: |
71d3aa6d MD |
3027 | #ifdef BUILTIN_RPASUBR |
3028 | if (SCM_FALSEP (SCM_SUBRF (proc) (t.arg1, arg2))) | |
3029 | RETURN (SCM_BOOL_F) | |
3030 | t.arg1 = SCM_CDR (SCM_CDR (debug.info->a.args)); | |
da7f71d7 MD |
3031 | do |
3032 | { | |
3033 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg2, SCM_CAR (t.arg1)))) | |
3034 | RETURN (SCM_BOOL_F) | |
3035 | arg2 = SCM_CAR (t.arg1); | |
3036 | t.arg1 = SCM_CDR (t.arg1); | |
3037 | } | |
3038 | while (SCM_NIMP (t.arg1)); | |
71d3aa6d MD |
3039 | RETURN (SCM_BOOL_T) |
3040 | #else /* BUILTIN_RPASUBR */ | |
da7f71d7 MD |
3041 | RETURN (SCM_APPLY (proc, t.arg1, |
3042 | scm_acons (arg2, | |
3043 | SCM_CDR (SCM_CDR (debug.info->a.args)), | |
3044 | SCM_EOL))) | |
71d3aa6d | 3045 | #endif /* BUILTIN_RPASUBR */ |
399dedcc | 3046 | case scm_tc7_lsubr_2: |
da7f71d7 MD |
3047 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, |
3048 | SCM_CDR (SCM_CDR (debug.info->a.args)))) | |
399dedcc MD |
3049 | case scm_tc7_lsubr: |
3050 | RETURN (SCM_SUBRF (proc) (debug.info->a.args)) | |
0717dfd8 | 3051 | case scm_tc7_smob: |
68b06924 | 3052 | if (!SCM_SMOB_APPLICABLE_P (proc)) |
0717dfd8 | 3053 | goto badfun; |
68b06924 KN |
3054 | RETURN (SCM_SMOB_APPLY_3 (proc, t.arg1, arg2, |
3055 | SCM_CDDR (debug.info->a.args))); | |
6dbd0af5 MD |
3056 | case scm_tc7_cclo: |
3057 | goto cclon; | |
89efbff4 MD |
3058 | case scm_tc7_pws: |
3059 | proc = SCM_PROCEDURE (proc); | |
3060 | debug.info->a.proc = proc; | |
002f1a5d MD |
3061 | if (!SCM_CLOSUREP (proc)) |
3062 | goto evap3; | |
3063 | if (scm_badargsp (SCM_CAR (SCM_CODE (proc)), debug.info->a.args)) | |
3064 | goto umwrongnumargs; | |
6dbd0af5 | 3065 | case scm_tcs_closures: |
b7ff98dd | 3066 | SCM_SET_ARGSREADY (debug); |
e2806c10 | 3067 | env = EXTEND_ENV (SCM_CAR (SCM_CODE (proc)), |
6dbd0af5 MD |
3068 | debug.info->a.args, |
3069 | SCM_ENV (proc)); | |
3070 | x = SCM_CODE (proc); | |
5280aaca | 3071 | goto nontoplevel_cdrxbegin; |
6dbd0af5 MD |
3072 | #else /* DEVAL */ |
3073 | case scm_tc7_subr_3: | |
3074 | SCM_ASRTGO (SCM_NULLP (SCM_CDR (x)), wrongnumargs); | |
3075 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, EVALCAR (x, env))); | |
3076 | case scm_tc7_asubr: | |
399dedcc | 3077 | #ifdef BUILTIN_RPASUBR |
da7f71d7 MD |
3078 | t.arg1 = SCM_SUBRF (proc) (t.arg1, arg2); |
3079 | do | |
3080 | { | |
3081 | t.arg1 = SCM_SUBRF(proc)(t.arg1, EVALCAR(x, env)); | |
3082 | x = SCM_CDR(x); | |
3083 | } | |
3084 | while (SCM_NIMP (x)); | |
399dedcc MD |
3085 | RETURN (t.arg1) |
3086 | #endif /* BUILTIN_RPASUBR */ | |
6dbd0af5 | 3087 | case scm_tc7_rpsubr: |
71d3aa6d MD |
3088 | #ifdef BUILTIN_RPASUBR |
3089 | if (SCM_FALSEP (SCM_SUBRF (proc) (t.arg1, arg2))) | |
3090 | RETURN (SCM_BOOL_F) | |
da7f71d7 MD |
3091 | do |
3092 | { | |
3093 | t.arg1 = EVALCAR (x, env); | |
3094 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg2, t.arg1))) | |
3095 | RETURN (SCM_BOOL_F) | |
3096 | arg2 = t.arg1; | |
3097 | x = SCM_CDR (x); | |
3098 | } | |
3099 | while (SCM_NIMP (x)); | |
71d3aa6d MD |
3100 | RETURN (SCM_BOOL_T) |
3101 | #else /* BUILTIN_RPASUBR */ | |
da7f71d7 | 3102 | RETURN (SCM_APPLY (proc, t.arg1, |
680ed4a8 MD |
3103 | scm_acons (arg2, |
3104 | scm_eval_args (x, env, proc), | |
3105 | SCM_EOL))); | |
71d3aa6d | 3106 | #endif /* BUILTIN_RPASUBR */ |
6dbd0af5 | 3107 | case scm_tc7_lsubr_2: |
680ed4a8 | 3108 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, scm_eval_args (x, env, proc))); |
6dbd0af5 | 3109 | case scm_tc7_lsubr: |
680ed4a8 MD |
3110 | RETURN (SCM_SUBRF (proc) (scm_cons2 (t.arg1, |
3111 | arg2, | |
3112 | scm_eval_args (x, env, proc)))); | |
0717dfd8 | 3113 | case scm_tc7_smob: |
68b06924 | 3114 | if (!SCM_SMOB_APPLICABLE_P (proc)) |
0717dfd8 | 3115 | goto badfun; |
68b06924 KN |
3116 | RETURN (SCM_SMOB_APPLY_3 (proc, t.arg1, arg2, |
3117 | scm_eval_args (x, env, proc))); | |
6dbd0af5 MD |
3118 | case scm_tc7_cclo: |
3119 | goto cclon; | |
89efbff4 MD |
3120 | case scm_tc7_pws: |
3121 | proc = SCM_PROCEDURE (proc); | |
002f1a5d MD |
3122 | if (!SCM_CLOSUREP (proc)) |
3123 | goto evap3; | |
3124 | { | |
3125 | SCM formals = SCM_CAR (SCM_CODE (proc)); | |
3126 | if (SCM_NULLP (formals) | |
3127 | || (SCM_CONSP (formals) | |
3128 | && (SCM_NULLP (SCM_CDR (formals)) | |
3129 | || (SCM_CONSP (SCM_CDR (formals)) | |
3130 | && scm_badargsp (SCM_CDDR (formals), x))))) | |
3131 | goto umwrongnumargs; | |
3132 | } | |
6dbd0af5 MD |
3133 | case scm_tcs_closures: |
3134 | #ifdef DEVAL | |
b7ff98dd | 3135 | SCM_SET_ARGSREADY (debug); |
6dbd0af5 | 3136 | #endif |
e2806c10 | 3137 | env = EXTEND_ENV (SCM_CAR (SCM_CODE (proc)), |
680ed4a8 MD |
3138 | scm_cons2 (t.arg1, |
3139 | arg2, | |
3140 | scm_eval_args (x, env, proc)), | |
6dbd0af5 MD |
3141 | SCM_ENV (proc)); |
3142 | x = SCM_CODE (proc); | |
5280aaca | 3143 | goto nontoplevel_cdrxbegin; |
0f2d19dd | 3144 | #endif /* DEVAL */ |
0c32d76c | 3145 | case scm_tcs_cons_gloc: |
f3d2630a MD |
3146 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) |
3147 | { | |
3148 | #ifdef DEVAL | |
3149 | arg2 = debug.info->a.args; | |
3150 | #else | |
3151 | arg2 = scm_cons2 (t.arg1, arg2, scm_eval_args (x, env, proc)); | |
3152 | #endif | |
195847fa | 3153 | x = SCM_ENTITY_PROCEDURE (proc); |
f3d2630a MD |
3154 | goto type_dispatch; |
3155 | } | |
3156 | else if (!SCM_I_OPERATORP (proc)) | |
9b07e212 MD |
3157 | goto badfun; |
3158 | else | |
195847fa | 3159 | goto operatorn; |
6dbd0af5 MD |
3160 | case scm_tc7_subr_2: |
3161 | case scm_tc7_subr_1o: | |
3162 | case scm_tc7_subr_2o: | |
3163 | case scm_tc7_subr_0: | |
3164 | case scm_tc7_cxr: | |
3165 | case scm_tc7_subr_1: | |
6dbd0af5 MD |
3166 | goto wrongnumargs; |
3167 | default: | |
3168 | goto badfun; | |
3169 | } | |
0f2d19dd JB |
3170 | } |
3171 | #ifdef DEVAL | |
6dbd0af5 | 3172 | exit: |
b6d75948 | 3173 | if (CHECK_EXIT && SCM_TRAPS_P) |
b7ff98dd | 3174 | if (SCM_EXIT_FRAME_P || (SCM_TRACE_P && SCM_TRACED_FRAME_P (debug))) |
6dbd0af5 | 3175 | { |
b7ff98dd MD |
3176 | SCM_CLEAR_TRACED_FRAME (debug); |
3177 | if (SCM_CHEAPTRAPS_P) | |
c0ab1b8d | 3178 | t.arg1 = scm_make_debugobj (&debug); |
6dbd0af5 MD |
3179 | else |
3180 | { | |
5f144b10 GH |
3181 | int first; |
3182 | SCM val = scm_make_continuation (&first); | |
3183 | ||
3184 | if (first) | |
3185 | t.arg1 = val; | |
3186 | else | |
6dbd0af5 | 3187 | { |
5f144b10 | 3188 | proc = val; |
6dbd0af5 MD |
3189 | goto ret; |
3190 | } | |
3191 | } | |
2f0d1375 | 3192 | scm_ithrow (scm_sym_exit_frame, scm_cons2 (t.arg1, proc, SCM_EOL), 0); |
6dbd0af5 MD |
3193 | } |
3194 | ret: | |
1646d37b | 3195 | scm_last_debug_frame = debug.prev; |
0f2d19dd JB |
3196 | return proc; |
3197 | #endif | |
3198 | } | |
3199 | ||
6dbd0af5 MD |
3200 | |
3201 | /* SECTION: This code is compiled once. | |
3202 | */ | |
3203 | ||
0f2d19dd JB |
3204 | #ifndef DEVAL |
3205 | ||
82a2622a | 3206 | /* This code processes the arguments to apply: |
b145c172 JB |
3207 | |
3208 | (apply PROC ARG1 ... ARGS) | |
3209 | ||
82a2622a JB |
3210 | Given a list (ARG1 ... ARGS), this function conses the ARG1 |
3211 | ... arguments onto the front of ARGS, and returns the resulting | |
3212 | list. Note that ARGS is a list; thus, the argument to this | |
3213 | function is a list whose last element is a list. | |
3214 | ||
3215 | Apply calls this function, and applies PROC to the elements of the | |
b145c172 JB |
3216 | result. apply:nconc2last takes care of building the list of |
3217 | arguments, given (ARG1 ... ARGS). | |
3218 | ||
82a2622a JB |
3219 | Rather than do new consing, apply:nconc2last destroys its argument. |
3220 | On that topic, this code came into my care with the following | |
3221 | beautifully cryptic comment on that topic: "This will only screw | |
3222 | you if you do (scm_apply scm_apply '( ... ))" If you know what | |
3223 | they're referring to, send me a patch to this comment. */ | |
b145c172 | 3224 | |
3b3b36dd | 3225 | SCM_DEFINE (scm_nconc2last, "apply:nconc2last", 1, 0, 0, |
b3f26b14 MG |
3226 | (SCM lst), |
3227 | "Given a list (@var{arg1} @dots{} @var{args}), this function\n" | |
3228 | "conses the @var{arg1} @dots{} arguments onto the front of\n" | |
3229 | "@var{args}, and returns the resulting list. Note that\n" | |
3230 | "@var{args} is a list; thus, the argument to this function is\n" | |
3231 | "a list whose last element is a list.\n" | |
3232 | "Note: Rather than do new consing, @code{apply:nconc2last}\n" | |
3233 | "destroys its argument, so use with care.") | |
1bbd0b84 | 3234 | #define FUNC_NAME s_scm_nconc2last |
0f2d19dd JB |
3235 | { |
3236 | SCM *lloc; | |
c1bfcf60 | 3237 | SCM_VALIDATE_NONEMPTYLIST (1,lst); |
0f2d19dd JB |
3238 | lloc = &lst; |
3239 | while (SCM_NNULLP (SCM_CDR (*lloc))) | |
a23afe53 | 3240 | lloc = SCM_CDRLOC (*lloc); |
1bbd0b84 | 3241 | SCM_ASSERT (scm_ilength (SCM_CAR (*lloc)) >= 0, lst, SCM_ARG1, FUNC_NAME); |
0f2d19dd JB |
3242 | *lloc = SCM_CAR (*lloc); |
3243 | return lst; | |
3244 | } | |
1bbd0b84 | 3245 | #undef FUNC_NAME |
0f2d19dd JB |
3246 | |
3247 | #endif /* !DEVAL */ | |
3248 | ||
6dbd0af5 MD |
3249 | |
3250 | /* SECTION: When DEVAL is defined this code yields scm_dapply. | |
3251 | * It is compiled twice. | |
3252 | */ | |
3253 | ||
0f2d19dd | 3254 | #if 0 |
1cc91f1b | 3255 | |
0f2d19dd | 3256 | SCM |
6e8d25a6 | 3257 | scm_apply (SCM proc, SCM arg1, SCM args) |
0f2d19dd JB |
3258 | {} |
3259 | #endif | |
3260 | ||
3261 | #if 0 | |
1cc91f1b | 3262 | |
0f2d19dd | 3263 | SCM |
6e8d25a6 GB |
3264 | scm_dapply (SCM proc, SCM arg1, SCM args) |
3265 | { /* empty */ } | |
0f2d19dd JB |
3266 | #endif |
3267 | ||
1cc91f1b | 3268 | |
82a2622a JB |
3269 | /* Apply a function to a list of arguments. |
3270 | ||
3271 | This function is exported to the Scheme level as taking two | |
3272 | required arguments and a tail argument, as if it were: | |
3273 | (lambda (proc arg1 . args) ...) | |
3274 | Thus, if you just have a list of arguments to pass to a procedure, | |
3275 | pass the list as ARG1, and '() for ARGS. If you have some fixed | |
3276 | args, pass the first as ARG1, then cons any remaining fixed args | |
3277 | onto the front of your argument list, and pass that as ARGS. */ | |
3278 | ||
0f2d19dd | 3279 | SCM |
1bbd0b84 | 3280 | SCM_APPLY (SCM proc, SCM arg1, SCM args) |
0f2d19dd JB |
3281 | { |
3282 | #ifdef DEBUG_EXTENSIONS | |
3283 | #ifdef DEVAL | |
6dbd0af5 | 3284 | scm_debug_frame debug; |
c0ab1b8d | 3285 | scm_debug_info debug_vect_body; |
1646d37b | 3286 | debug.prev = scm_last_debug_frame; |
b7ff98dd | 3287 | debug.status = SCM_APPLYFRAME; |
c0ab1b8d | 3288 | debug.vect = &debug_vect_body; |
6dbd0af5 MD |
3289 | debug.vect[0].a.proc = proc; |
3290 | debug.vect[0].a.args = SCM_EOL; | |
1646d37b | 3291 | scm_last_debug_frame = &debug; |
0f2d19dd | 3292 | #else |
b7ff98dd | 3293 | if (SCM_DEBUGGINGP) |
0f2d19dd JB |
3294 | return scm_dapply (proc, arg1, args); |
3295 | #endif | |
3296 | #endif | |
3297 | ||
3298 | SCM_ASRTGO (SCM_NIMP (proc), badproc); | |
82a2622a JB |
3299 | |
3300 | /* If ARGS is the empty list, then we're calling apply with only two | |
3301 | arguments --- ARG1 is the list of arguments for PROC. Whatever | |
3302 | the case, futz with things so that ARG1 is the first argument to | |
3303 | give to PROC (or SCM_UNDEFINED if no args), and ARGS contains the | |
30000774 JB |
3304 | rest. |
3305 | ||
3306 | Setting the debug apply frame args this way is pretty messy. | |
3307 | Perhaps we should store arg1 and args directly in the frame as | |
3308 | received, and let scm_frame_arguments unpack them, because that's | |
3309 | a relatively rare operation. This works for now; if the Guile | |
3310 | developer archives are still around, see Mikael's post of | |
3311 | 11-Apr-97. */ | |
0f2d19dd JB |
3312 | if (SCM_NULLP (args)) |
3313 | { | |
3314 | if (SCM_NULLP (arg1)) | |
30000774 JB |
3315 | { |
3316 | arg1 = SCM_UNDEFINED; | |
3317 | #ifdef DEVAL | |
3318 | debug.vect[0].a.args = SCM_EOL; | |
3319 | #endif | |
3320 | } | |
0f2d19dd JB |
3321 | else |
3322 | { | |
30000774 JB |
3323 | #ifdef DEVAL |
3324 | debug.vect[0].a.args = arg1; | |
3325 | #endif | |
0f2d19dd JB |
3326 | args = SCM_CDR (arg1); |
3327 | arg1 = SCM_CAR (arg1); | |
3328 | } | |
3329 | } | |
3330 | else | |
3331 | { | |
0f2d19dd | 3332 | args = scm_nconc2last (args); |
30000774 JB |
3333 | #ifdef DEVAL |
3334 | debug.vect[0].a.args = scm_cons (arg1, args); | |
3335 | #endif | |
0f2d19dd | 3336 | } |
0f2d19dd | 3337 | #ifdef DEVAL |
b6d75948 | 3338 | if (SCM_ENTER_FRAME_P && SCM_TRAPS_P) |
6dbd0af5 MD |
3339 | { |
3340 | SCM tmp; | |
b7ff98dd | 3341 | if (SCM_CHEAPTRAPS_P) |
c0ab1b8d | 3342 | tmp = scm_make_debugobj (&debug); |
6dbd0af5 MD |
3343 | else |
3344 | { | |
5f144b10 GH |
3345 | int first; |
3346 | ||
3347 | tmp = scm_make_continuation (&first); | |
3348 | if (!first) | |
6dbd0af5 MD |
3349 | goto entap; |
3350 | } | |
2f0d1375 | 3351 | scm_ithrow (scm_sym_enter_frame, scm_cons (tmp, SCM_EOL), 0); |
6dbd0af5 MD |
3352 | } |
3353 | entap: | |
3354 | ENTER_APPLY; | |
3355 | #endif | |
6dbd0af5 | 3356 | tail: |
0f2d19dd JB |
3357 | switch (SCM_TYP7 (proc)) |
3358 | { | |
3359 | case scm_tc7_subr_2o: | |
3360 | args = SCM_NULLP (args) ? SCM_UNDEFINED : SCM_CAR (args); | |
3361 | RETURN (SCM_SUBRF (proc) (arg1, args)) | |
3362 | case scm_tc7_subr_2: | |
269861c7 MD |
3363 | SCM_ASRTGO (SCM_NNULLP (args) && SCM_NULLP (SCM_CDR (args)), |
3364 | wrongnumargs); | |
0f2d19dd JB |
3365 | args = SCM_CAR (args); |
3366 | RETURN (SCM_SUBRF (proc) (arg1, args)) | |
3367 | case scm_tc7_subr_0: | |
3368 | SCM_ASRTGO (SCM_UNBNDP (arg1), wrongnumargs); | |
3369 | RETURN (SCM_SUBRF (proc) ()) | |
3370 | case scm_tc7_subr_1: | |
41ee56dd | 3371 | SCM_ASRTGO (!SCM_UNBNDP (arg1), wrongnumargs); |
0f2d19dd JB |
3372 | case scm_tc7_subr_1o: |
3373 | SCM_ASRTGO (SCM_NULLP (args), wrongnumargs); | |
3374 | RETURN (SCM_SUBRF (proc) (arg1)) | |
3375 | case scm_tc7_cxr: | |
3376 | SCM_ASRTGO (SCM_NULLP (args), wrongnumargs); | |
0f2d19dd JB |
3377 | if (SCM_SUBRF (proc)) |
3378 | { | |
6dbd0af5 MD |
3379 | if (SCM_INUMP (arg1)) |
3380 | { | |
f8de44c1 | 3381 | RETURN (scm_make_real (SCM_DSUBRF (proc) ((double) SCM_INUM (arg1)))); |
6dbd0af5 | 3382 | } |
0f2d19dd | 3383 | SCM_ASRTGO (SCM_NIMP (arg1), floerr); |
6dbd0af5 MD |
3384 | if (SCM_REALP (arg1)) |
3385 | { | |
eb42e2f0 | 3386 | RETURN (scm_make_real (SCM_DSUBRF (proc) (SCM_REAL_VALUE (arg1)))); |
6dbd0af5 | 3387 | } |
0f2d19dd | 3388 | #ifdef SCM_BIGDIG |
26d5b9b4 | 3389 | if (SCM_BIGP (arg1)) |
f8de44c1 | 3390 | RETURN (scm_make_real (SCM_DSUBRF (proc) (scm_big2dbl (arg1)))) |
0f2d19dd JB |
3391 | #endif |
3392 | floerr: | |
9de33deb | 3393 | SCM_WTA_DISPATCH_1 (*SCM_SUBR_GENERIC (proc), arg1, |
3db4adfc | 3394 | SCM_ARG1, SCM_SYMBOL_CHARS (SCM_SNAME (proc))); |
0f2d19dd | 3395 | } |
3201d763 | 3396 | proc = SCM_SNAME (proc); |
0f2d19dd | 3397 | { |
b5c2579a | 3398 | char *chrs = SCM_SYMBOL_CHARS (proc) + SCM_SYMBOL_LENGTH (proc) - 1; |
0f2d19dd JB |
3399 | while ('c' != *--chrs) |
3400 | { | |
0c95b57d | 3401 | SCM_ASSERT (SCM_CONSP (arg1), |
3db4adfc | 3402 | arg1, SCM_ARG1, SCM_SYMBOL_CHARS (proc)); |
0f2d19dd JB |
3403 | arg1 = ('a' == *chrs) ? SCM_CAR (arg1) : SCM_CDR (arg1); |
3404 | } | |
3405 | RETURN (arg1) | |
3406 | } | |
3407 | case scm_tc7_subr_3: | |
f1e06a96 MD |
3408 | SCM_ASRTGO (SCM_NNULLP (args) |
3409 | && SCM_NNULLP (SCM_CDR (args)) | |
3410 | && SCM_NULLP (SCM_CDDR (args)), | |
3411 | wrongnumargs); | |
0f2d19dd JB |
3412 | RETURN (SCM_SUBRF (proc) (arg1, SCM_CAR (args), SCM_CAR (SCM_CDR (args)))) |
3413 | case scm_tc7_lsubr: | |
3414 | #ifdef DEVAL | |
6dbd0af5 | 3415 | RETURN (SCM_SUBRF (proc) (SCM_UNBNDP (arg1) ? SCM_EOL : debug.vect[0].a.args)) |
0f2d19dd JB |
3416 | #else |
3417 | RETURN (SCM_SUBRF (proc) (SCM_UNBNDP (arg1) ? SCM_EOL : scm_cons (arg1, args))) | |
3418 | #endif | |
3419 | case scm_tc7_lsubr_2: | |
0c95b57d | 3420 | SCM_ASRTGO (SCM_CONSP (args), wrongnumargs); |
0f2d19dd JB |
3421 | RETURN (SCM_SUBRF (proc) (arg1, SCM_CAR (args), SCM_CDR (args))) |
3422 | case scm_tc7_asubr: | |
3423 | if (SCM_NULLP (args)) | |
3424 | RETURN (SCM_SUBRF (proc) (arg1, SCM_UNDEFINED)) | |
3425 | while (SCM_NIMP (args)) | |
3426 | { | |
3427 | SCM_ASSERT (SCM_CONSP (args), args, SCM_ARG2, "apply"); | |
3428 | arg1 = SCM_SUBRF (proc) (arg1, SCM_CAR (args)); | |
3429 | args = SCM_CDR (args); | |
3430 | } | |
3431 | RETURN (arg1); | |
3432 | case scm_tc7_rpsubr: | |
3433 | if (SCM_NULLP (args)) | |
3434 | RETURN (SCM_BOOL_T); | |
3435 | while (SCM_NIMP (args)) | |
3436 | { | |
3437 | SCM_ASSERT (SCM_CONSP (args), args, SCM_ARG2, "apply"); | |
3438 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg1, SCM_CAR (args)))) | |
3439 | RETURN (SCM_BOOL_F); | |
3440 | arg1 = SCM_CAR (args); | |
3441 | args = SCM_CDR (args); | |
3442 | } | |
3443 | RETURN (SCM_BOOL_T); | |
3444 | case scm_tcs_closures: | |
3445 | #ifdef DEVAL | |
6dbd0af5 | 3446 | arg1 = (SCM_UNBNDP (arg1) ? SCM_EOL : debug.vect[0].a.args); |
0f2d19dd JB |
3447 | #else |
3448 | arg1 = (SCM_UNBNDP (arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
3449 | #endif | |
cf7c17e9 | 3450 | #ifndef SCM_RECKLESS |
0f2d19dd JB |
3451 | if (scm_badargsp (SCM_CAR (SCM_CODE (proc)), arg1)) |
3452 | goto wrongnumargs; | |
3453 | #endif | |
1609038c MD |
3454 | |
3455 | /* Copy argument list */ | |
3456 | if (SCM_IMP (arg1)) | |
3457 | args = arg1; | |
3458 | else | |
3459 | { | |
3460 | SCM tl = args = scm_cons (SCM_CAR (arg1), SCM_UNSPECIFIED); | |
cabe682c | 3461 | while (arg1 = SCM_CDR (arg1), SCM_CONSP (arg1)) |
1609038c MD |
3462 | { |
3463 | SCM_SETCDR (tl, scm_cons (SCM_CAR (arg1), | |
3464 | SCM_UNSPECIFIED)); | |
3465 | tl = SCM_CDR (tl); | |
3466 | } | |
3467 | SCM_SETCDR (tl, arg1); | |
3468 | } | |
3469 | ||
3470 | args = EXTEND_ENV (SCM_CAR (SCM_CODE (proc)), args, SCM_ENV (proc)); | |
2ddb0920 | 3471 | proc = SCM_CDR (SCM_CODE (proc)); |
e791c18f MD |
3472 | again: |
3473 | arg1 = proc; | |
3474 | while (SCM_NNULLP (arg1 = SCM_CDR (arg1))) | |
2ddb0920 MD |
3475 | { |
3476 | if (SCM_IMP (SCM_CAR (proc))) | |
3477 | { | |
3478 | if (SCM_ISYMP (SCM_CAR (proc))) | |
3479 | { | |
3480 | proc = scm_m_expand_body (proc, args); | |
e791c18f | 3481 | goto again; |
2ddb0920 | 3482 | } |
5280aaca MV |
3483 | else |
3484 | SCM_EVALIM2 (SCM_CAR (proc)); | |
2ddb0920 MD |
3485 | } |
3486 | else | |
e791c18f MD |
3487 | SCM_CEVAL (SCM_CAR (proc), args); |
3488 | proc = arg1; | |
2ddb0920 | 3489 | } |
e791c18f | 3490 | RETURN (EVALCAR (proc, args)); |
0717dfd8 | 3491 | case scm_tc7_smob: |
68b06924 | 3492 | if (!SCM_SMOB_APPLICABLE_P (proc)) |
0717dfd8 | 3493 | goto badproc; |
afa38f6e | 3494 | if (SCM_UNBNDP (arg1)) |
68b06924 | 3495 | RETURN (SCM_SMOB_APPLY_0 (proc)) |
afa38f6e | 3496 | else if (SCM_NULLP (args)) |
68b06924 | 3497 | RETURN (SCM_SMOB_APPLY_1 (proc, arg1)) |
0717dfd8 | 3498 | else if (SCM_NULLP (SCM_CDR (args))) |
68b06924 | 3499 | RETURN (SCM_SMOB_APPLY_2 (proc, arg1, SCM_CAR (args))) |
0717dfd8 | 3500 | else |
68b06924 | 3501 | RETURN (SCM_SMOB_APPLY_3 (proc, arg1, SCM_CAR (args), SCM_CDR (args))); |
0f2d19dd JB |
3502 | case scm_tc7_cclo: |
3503 | #ifdef DEVAL | |
6dbd0af5 MD |
3504 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : debug.vect[0].a.args); |
3505 | arg1 = proc; | |
3506 | proc = SCM_CCLO_SUBR (proc); | |
3507 | debug.vect[0].a.proc = proc; | |
3508 | debug.vect[0].a.args = scm_cons (arg1, args); | |
0f2d19dd JB |
3509 | #else |
3510 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
0f2d19dd JB |
3511 | arg1 = proc; |
3512 | proc = SCM_CCLO_SUBR (proc); | |
6dbd0af5 | 3513 | #endif |
0f2d19dd | 3514 | goto tail; |
89efbff4 MD |
3515 | case scm_tc7_pws: |
3516 | proc = SCM_PROCEDURE (proc); | |
3517 | #ifdef DEVAL | |
3518 | debug.vect[0].a.proc = proc; | |
3519 | #endif | |
3520 | goto tail; | |
0c32d76c | 3521 | case scm_tcs_cons_gloc: |
f3d2630a MD |
3522 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) |
3523 | { | |
3524 | #ifdef DEVAL | |
3525 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : debug.vect[0].a.args); | |
3526 | #else | |
3527 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
3528 | #endif | |
195847fa | 3529 | RETURN (scm_apply_generic (proc, args)); |
f3d2630a MD |
3530 | } |
3531 | else if (!SCM_I_OPERATORP (proc)) | |
9b07e212 MD |
3532 | goto badproc; |
3533 | else | |
da7f71d7 MD |
3534 | { |
3535 | #ifdef DEVAL | |
3536 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : debug.vect[0].a.args); | |
3537 | #else | |
3538 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
3539 | #endif | |
3540 | arg1 = proc; | |
195847fa MD |
3541 | proc = (SCM_I_ENTITYP (proc) |
3542 | ? SCM_ENTITY_PROCEDURE (proc) | |
3543 | : SCM_OPERATOR_PROCEDURE (proc)); | |
da7f71d7 MD |
3544 | #ifdef DEVAL |
3545 | debug.vect[0].a.proc = proc; | |
3546 | debug.vect[0].a.args = scm_cons (arg1, args); | |
3547 | #endif | |
195847fa MD |
3548 | if (SCM_NIMP (proc)) |
3549 | goto tail; | |
3550 | else | |
3551 | goto badproc; | |
da7f71d7 | 3552 | } |
0f2d19dd | 3553 | wrongnumargs: |
f5bf2977 | 3554 | scm_wrong_num_args (proc); |
0f2d19dd JB |
3555 | default: |
3556 | badproc: | |
db4b4ca6 | 3557 | scm_wrong_type_arg ("apply", SCM_ARG1, proc); |
0f2d19dd JB |
3558 | RETURN (arg1); |
3559 | } | |
3560 | #ifdef DEVAL | |
6dbd0af5 | 3561 | exit: |
b6d75948 | 3562 | if (CHECK_EXIT && SCM_TRAPS_P) |
b7ff98dd | 3563 | if (SCM_EXIT_FRAME_P || (SCM_TRACE_P && SCM_TRACED_FRAME_P (debug))) |
6dbd0af5 | 3564 | { |
b7ff98dd MD |
3565 | SCM_CLEAR_TRACED_FRAME (debug); |
3566 | if (SCM_CHEAPTRAPS_P) | |
c0ab1b8d | 3567 | arg1 = scm_make_debugobj (&debug); |
6dbd0af5 MD |
3568 | else |
3569 | { | |
5f144b10 GH |
3570 | int first; |
3571 | SCM val = scm_make_continuation (&first); | |
3572 | ||
3573 | if (first) | |
3574 | arg1 = val; | |
3575 | else | |
6dbd0af5 | 3576 | { |
5f144b10 | 3577 | proc = val; |
6dbd0af5 MD |
3578 | goto ret; |
3579 | } | |
3580 | } | |
2f0d1375 | 3581 | scm_ithrow (scm_sym_exit_frame, scm_cons2 (arg1, proc, SCM_EOL), 0); |
6dbd0af5 MD |
3582 | } |
3583 | ret: | |
1646d37b | 3584 | scm_last_debug_frame = debug.prev; |
0f2d19dd JB |
3585 | return proc; |
3586 | #endif | |
3587 | } | |
3588 | ||
6dbd0af5 MD |
3589 | |
3590 | /* SECTION: The rest of this file is only read once. | |
3591 | */ | |
3592 | ||
0f2d19dd JB |
3593 | #ifndef DEVAL |
3594 | ||
d9c393f5 JB |
3595 | /* Typechecking for multi-argument MAP and FOR-EACH. |
3596 | ||
47c3f06d | 3597 | Verify that each element of the vector ARGV, except for the first, |
d9c393f5 | 3598 | is a proper list whose length is LEN. Attribute errors to WHO, |
47c3f06d | 3599 | and claim that the i'th element of ARGV is WHO's i+2'th argument. */ |
d9c393f5 | 3600 | static inline void |
47c3f06d MD |
3601 | check_map_args (SCM argv, |
3602 | long len, | |
3603 | SCM gf, | |
3604 | SCM proc, | |
3605 | SCM args, | |
3606 | const char *who) | |
d9c393f5 | 3607 | { |
47c3f06d | 3608 | SCM *ve = SCM_VELTS (argv); |
d9c393f5 JB |
3609 | int i; |
3610 | ||
b5c2579a | 3611 | for (i = SCM_VECTOR_LENGTH (argv) - 1; i >= 1; i--) |
d9c393f5 JB |
3612 | { |
3613 | int elt_len = scm_ilength (ve[i]); | |
3614 | ||
3615 | if (elt_len < 0) | |
47c3f06d MD |
3616 | { |
3617 | if (gf) | |
3618 | scm_apply_generic (gf, scm_cons (proc, args)); | |
3619 | else | |
3620 | scm_wrong_type_arg (who, i + 2, ve[i]); | |
3621 | } | |
d9c393f5 JB |
3622 | |
3623 | if (elt_len != len) | |
3624 | scm_out_of_range (who, ve[i]); | |
3625 | } | |
3626 | ||
5d2b97cd | 3627 | scm_remember_upto_here_1 (argv); |
d9c393f5 JB |
3628 | } |
3629 | ||
3630 | ||
47c3f06d | 3631 | SCM_GPROC (s_map, "map", 2, 0, 1, scm_map, g_map); |
1cc91f1b | 3632 | |
368bf056 MD |
3633 | /* Note: Currently, scm_map applies PROC to the argument list(s) |
3634 | sequentially, starting with the first element(s). This is used in | |
8878f040 | 3635 | evalext.c where the Scheme procedure `map-in-order', which guarantees |
368bf056 | 3636 | sequential behaviour, is implemented using scm_map. If the |
8878f040 | 3637 | behaviour changes, we need to update `map-in-order'. |
368bf056 MD |
3638 | */ |
3639 | ||
0f2d19dd | 3640 | SCM |
1bbd0b84 | 3641 | scm_map (SCM proc, SCM arg1, SCM args) |
af45e3b0 | 3642 | #define FUNC_NAME s_map |
0f2d19dd | 3643 | { |
d9c393f5 | 3644 | long i, len; |
0f2d19dd JB |
3645 | SCM res = SCM_EOL; |
3646 | SCM *pres = &res; | |
3647 | SCM *ve = &args; /* Keep args from being optimized away. */ | |
3648 | ||
d9c393f5 | 3649 | len = scm_ilength (arg1); |
47c3f06d MD |
3650 | SCM_GASSERTn (len >= 0, |
3651 | g_map, scm_cons2 (proc, arg1, args), SCM_ARG2, s_map); | |
af45e3b0 | 3652 | SCM_VALIDATE_REST_ARGUMENT (args); |
0f2d19dd JB |
3653 | if (SCM_NULLP (args)) |
3654 | { | |
3655 | while (SCM_NIMP (arg1)) | |
3656 | { | |
47c3f06d MD |
3657 | *pres = scm_cons (scm_apply (proc, SCM_CAR (arg1), scm_listofnull), |
3658 | SCM_EOL); | |
a23afe53 | 3659 | pres = SCM_CDRLOC (*pres); |
0f2d19dd JB |
3660 | arg1 = SCM_CDR (arg1); |
3661 | } | |
3662 | return res; | |
3663 | } | |
47c3f06d | 3664 | args = scm_vector (arg1 = scm_cons (arg1, args)); |
0f2d19dd | 3665 | ve = SCM_VELTS (args); |
cf7c17e9 | 3666 | #ifndef SCM_RECKLESS |
47c3f06d | 3667 | check_map_args (args, len, g_map, proc, arg1, s_map); |
0f2d19dd JB |
3668 | #endif |
3669 | while (1) | |
3670 | { | |
3671 | arg1 = SCM_EOL; | |
b5c2579a | 3672 | for (i = SCM_VECTOR_LENGTH (args) - 1; i >= 0; i--) |
0f2d19dd | 3673 | { |
d9c393f5 JB |
3674 | if (SCM_IMP (ve[i])) |
3675 | return res; | |
0f2d19dd JB |
3676 | arg1 = scm_cons (SCM_CAR (ve[i]), arg1); |
3677 | ve[i] = SCM_CDR (ve[i]); | |
3678 | } | |
3679 | *pres = scm_cons (scm_apply (proc, arg1, SCM_EOL), SCM_EOL); | |
a23afe53 | 3680 | pres = SCM_CDRLOC (*pres); |
0f2d19dd JB |
3681 | } |
3682 | } | |
af45e3b0 | 3683 | #undef FUNC_NAME |
0f2d19dd JB |
3684 | |
3685 | ||
47c3f06d | 3686 | SCM_GPROC (s_for_each, "for-each", 2, 0, 1, scm_for_each, g_for_each); |
1cc91f1b | 3687 | |
0f2d19dd | 3688 | SCM |
1bbd0b84 | 3689 | scm_for_each (SCM proc, SCM arg1, SCM args) |
af45e3b0 | 3690 | #define FUNC_NAME s_for_each |
0f2d19dd JB |
3691 | { |
3692 | SCM *ve = &args; /* Keep args from being optimized away. */ | |
d9c393f5 | 3693 | long i, len; |
d9c393f5 | 3694 | len = scm_ilength (arg1); |
47c3f06d MD |
3695 | SCM_GASSERTn (len >= 0, g_for_each, scm_cons2 (proc, arg1, args), |
3696 | SCM_ARG2, s_for_each); | |
af45e3b0 | 3697 | SCM_VALIDATE_REST_ARGUMENT (args); |
0f2d19dd JB |
3698 | if SCM_NULLP (args) |
3699 | { | |
3700 | while SCM_NIMP (arg1) | |
3701 | { | |
0f2d19dd JB |
3702 | scm_apply (proc, SCM_CAR (arg1), scm_listofnull); |
3703 | arg1 = SCM_CDR (arg1); | |
3704 | } | |
3705 | return SCM_UNSPECIFIED; | |
3706 | } | |
47c3f06d | 3707 | args = scm_vector (arg1 = scm_cons (arg1, args)); |
0f2d19dd | 3708 | ve = SCM_VELTS (args); |
cf7c17e9 | 3709 | #ifndef SCM_RECKLESS |
47c3f06d | 3710 | check_map_args (args, len, g_for_each, proc, arg1, s_for_each); |
0f2d19dd JB |
3711 | #endif |
3712 | while (1) | |
3713 | { | |
3714 | arg1 = SCM_EOL; | |
b5c2579a | 3715 | for (i = SCM_VECTOR_LENGTH (args) - 1; i >= 0; i--) |
0f2d19dd JB |
3716 | { |
3717 | if SCM_IMP | |
3718 | (ve[i]) return SCM_UNSPECIFIED; | |
3719 | arg1 = scm_cons (SCM_CAR (ve[i]), arg1); | |
3720 | ve[i] = SCM_CDR (ve[i]); | |
3721 | } | |
3722 | scm_apply (proc, arg1, SCM_EOL); | |
3723 | } | |
3724 | } | |
af45e3b0 | 3725 | #undef FUNC_NAME |
0f2d19dd | 3726 | |
1cc91f1b | 3727 | |
0f2d19dd | 3728 | SCM |
6e8d25a6 | 3729 | scm_closure (SCM code, SCM env) |
0f2d19dd JB |
3730 | { |
3731 | register SCM z; | |
3732 | SCM_NEWCELL (z); | |
3733 | SCM_SETCODE (z, code); | |
a23afe53 | 3734 | SCM_SETENV (z, env); |
0f2d19dd JB |
3735 | return z; |
3736 | } | |
3737 | ||
3738 | ||
e841c3e0 | 3739 | scm_bits_t scm_tc16_promise; |
1cc91f1b | 3740 | |
0f2d19dd | 3741 | SCM |
6e8d25a6 | 3742 | scm_makprom (SCM code) |
0f2d19dd | 3743 | { |
cf498326 | 3744 | SCM_RETURN_NEWSMOB (scm_tc16_promise, SCM_UNPACK (code)); |
0f2d19dd JB |
3745 | } |
3746 | ||
3747 | ||
1cc91f1b | 3748 | |
0f2d19dd | 3749 | static int |
e841c3e0 | 3750 | promise_print (SCM exp, SCM port, scm_print_state *pstate) |
0f2d19dd | 3751 | { |
19402679 | 3752 | int writingp = SCM_WRITINGP (pstate); |
b7f3516f | 3753 | scm_puts ("#<promise ", port); |
19402679 MD |
3754 | SCM_SET_WRITINGP (pstate, 1); |
3755 | scm_iprin1 (SCM_CDR (exp), port, pstate); | |
3756 | SCM_SET_WRITINGP (pstate, writingp); | |
b7f3516f | 3757 | scm_putc ('>', port); |
0f2d19dd JB |
3758 | return !0; |
3759 | } | |
3760 | ||
3761 | ||
3b3b36dd | 3762 | SCM_DEFINE (scm_force, "force", 1, 0, 0, |
1bbd0b84 | 3763 | (SCM x), |
445f675c DH |
3764 | "If the promise X has not been computed yet, compute and return\n" |
3765 | "X, otherwise just return the previously computed value.") | |
1bbd0b84 | 3766 | #define FUNC_NAME s_scm_force |
0f2d19dd | 3767 | { |
445f675c DH |
3768 | SCM_VALIDATE_SMOB (1, x, promise); |
3769 | if (!((1L << 16) & SCM_CELL_WORD_0 (x))) | |
0f2d19dd | 3770 | { |
445f675c DH |
3771 | SCM ans = scm_apply (SCM_CELL_OBJECT_1 (x), SCM_EOL, SCM_EOL); |
3772 | if (!((1L << 16) & SCM_CELL_WORD_0 (x))) | |
0f2d19dd JB |
3773 | { |
3774 | SCM_DEFER_INTS; | |
445f675c DH |
3775 | SCM_SET_CELL_OBJECT_1 (x, ans); |
3776 | SCM_SET_CELL_WORD_0 (x, SCM_CELL_WORD_0 (x) | (1L << 16)); | |
0f2d19dd JB |
3777 | SCM_ALLOW_INTS; |
3778 | } | |
3779 | } | |
445f675c | 3780 | return SCM_CELL_OBJECT_1 (x); |
0f2d19dd | 3781 | } |
1bbd0b84 | 3782 | #undef FUNC_NAME |
0f2d19dd | 3783 | |
445f675c | 3784 | |
a1ec6916 | 3785 | SCM_DEFINE (scm_promise_p, "promise?", 1, 0, 0, |
1bbd0b84 | 3786 | (SCM x), |
b380b885 MD |
3787 | "Return true if @var{obj} is a promise, i.e. a delayed computation\n" |
3788 | "(@pxref{Delayed evaluation,,,r4rs.info,The Revised^4 Report on Scheme}).") | |
1bbd0b84 | 3789 | #define FUNC_NAME s_scm_promise_p |
0f2d19dd | 3790 | { |
e841c3e0 | 3791 | return SCM_BOOL (SCM_TYP16_PREDICATE (scm_tc16_promise, x)); |
0f2d19dd | 3792 | } |
1bbd0b84 | 3793 | #undef FUNC_NAME |
0f2d19dd | 3794 | |
445f675c | 3795 | |
a1ec6916 | 3796 | SCM_DEFINE (scm_cons_source, "cons-source", 3, 0, 0, |
1bbd0b84 | 3797 | (SCM xorig, SCM x, SCM y), |
11768c04 NJ |
3798 | "Create and return a new pair whose car and cdr are @var{x} and @var{y}.\n" |
3799 | "Any source properties associated with @var{xorig} are also associated\n" | |
3800 | "with the new pair.") | |
1bbd0b84 | 3801 | #define FUNC_NAME s_scm_cons_source |
26d5b9b4 MD |
3802 | { |
3803 | SCM p, z; | |
3804 | SCM_NEWCELL (z); | |
445f675c DH |
3805 | SCM_SET_CELL_OBJECT_0 (z, x); |
3806 | SCM_SET_CELL_OBJECT_1 (z, y); | |
26d5b9b4 MD |
3807 | /* Copy source properties possibly associated with xorig. */ |
3808 | p = scm_whash_lookup (scm_source_whash, xorig); | |
445f675c | 3809 | if (!SCM_IMP (p)) |
26d5b9b4 MD |
3810 | scm_whash_insert (scm_source_whash, z, p); |
3811 | return z; | |
3812 | } | |
1bbd0b84 | 3813 | #undef FUNC_NAME |
26d5b9b4 | 3814 | |
445f675c | 3815 | |
a1ec6916 | 3816 | SCM_DEFINE (scm_copy_tree, "copy-tree", 1, 0, 0, |
1bbd0b84 | 3817 | (SCM obj), |
b380b885 MD |
3818 | "Recursively copy the data tree that is bound to @var{obj}, and return a\n" |
3819 | "pointer to the new data structure. @code{copy-tree} recurses down the\n" | |
3820 | "contents of both pairs and vectors (since both cons cells and vector\n" | |
3821 | "cells may point to arbitrary objects), and stops recursing when it hits\n" | |
3822 | "any other object.") | |
1bbd0b84 | 3823 | #define FUNC_NAME s_scm_copy_tree |
0f2d19dd JB |
3824 | { |
3825 | SCM ans, tl; | |
26d5b9b4 | 3826 | if (SCM_IMP (obj)) |
ff467021 | 3827 | return obj; |
3910272e MD |
3828 | if (SCM_VECTORP (obj)) |
3829 | { | |
b5c2579a | 3830 | scm_sizet i = SCM_VECTOR_LENGTH (obj); |
00ffa0e7 | 3831 | ans = scm_c_make_vector (i, SCM_UNSPECIFIED); |
3910272e MD |
3832 | while (i--) |
3833 | SCM_VELTS (ans)[i] = scm_copy_tree (SCM_VELTS (obj)[i]); | |
3834 | return ans; | |
3835 | } | |
ff467021 | 3836 | if (SCM_NCONSP (obj)) |
0f2d19dd | 3837 | return obj; |
26d5b9b4 MD |
3838 | ans = tl = scm_cons_source (obj, |
3839 | scm_copy_tree (SCM_CAR (obj)), | |
3840 | SCM_UNSPECIFIED); | |
cabe682c | 3841 | while (obj = SCM_CDR (obj), SCM_CONSP (obj)) |
a23afe53 MD |
3842 | { |
3843 | SCM_SETCDR (tl, scm_cons (scm_copy_tree (SCM_CAR (obj)), | |
3844 | SCM_UNSPECIFIED)); | |
3845 | tl = SCM_CDR (tl); | |
3846 | } | |
3847 | SCM_SETCDR (tl, obj); | |
0f2d19dd JB |
3848 | return ans; |
3849 | } | |
1bbd0b84 | 3850 | #undef FUNC_NAME |
0f2d19dd | 3851 | |
1cc91f1b | 3852 | |
4163eb72 MV |
3853 | /* We have three levels of EVAL here: |
3854 | ||
3855 | - scm_i_eval (exp, env) | |
3856 | ||
3857 | evaluates EXP in environment ENV. ENV is a lexical environment | |
3858 | structure as used by the actual tree code evaluator. When ENV is | |
3859 | a top-level environment, then changes to the current module are | |
3860 | tracked by modifying ENV so that it continues to be in sync with | |
3861 | the current module. | |
3862 | ||
3863 | - scm_primitive_eval (exp) | |
3864 | ||
3865 | evaluates EXP in the top-level environment as determined by the | |
3866 | current module. This is done by constructing a suitable | |
3867 | environment and calling scm_i_eval. Thus, changes to the | |
3868 | top-level module are tracked normally. | |
3869 | ||
3870 | - scm_eval (exp, mod) | |
3871 | ||
3872 | evaluates EXP while MOD is the current module. Thius is done by | |
3873 | setting the current module to MOD, invoking scm_primitive_eval on | |
3874 | EXP, and then restoring the current module to the value it had | |
3875 | previously. That is, while EXP is evaluated, changes to the | |
3876 | current module are tracked, but these changes do not persist when | |
3877 | scm_eval returns. | |
3878 | ||
3879 | For each level of evals, there are two variants, distinguished by a | |
3880 | _x suffix: the ordinary variant does not modify EXP while the _x | |
3881 | variant can destructively modify EXP into something completely | |
3882 | unintelligible. A Scheme data structure passed as EXP to one of the | |
3883 | _x variants should not ever be used again for anything. So when in | |
3884 | doubt, use the ordinary variant. | |
3885 | ||
3886 | */ | |
3887 | ||
68d8be66 MD |
3888 | SCM scm_system_transformer; |
3889 | ||
018008c1 MV |
3890 | /* XXX - scm_i_eval is meant to be useable for evaluation in |
3891 | non-toplevel environments, for example when used by the debugger. | |
3892 | Can the system transform deal with this? */ | |
4163eb72 | 3893 | |
0f2d19dd | 3894 | SCM |
68d8be66 | 3895 | scm_i_eval_x (SCM exp, SCM env) |
0f2d19dd | 3896 | { |
549e6ec6 MD |
3897 | SCM transformer = scm_fluid_ref (SCM_CDR (scm_system_transformer)); |
3898 | if (SCM_NIMP (transformer)) | |
68d8be66 MD |
3899 | exp = scm_apply (transformer, exp, scm_listofnull); |
3900 | return SCM_XEVAL (exp, env); | |
0f2d19dd JB |
3901 | } |
3902 | ||
68d8be66 MD |
3903 | SCM |
3904 | scm_i_eval (SCM exp, SCM env) | |
3905 | { | |
3906 | SCM transformer = scm_fluid_ref (SCM_CDR (scm_system_transformer)); | |
3907 | if (SCM_NIMP (transformer)) | |
3908 | exp = scm_apply (transformer, exp, scm_listofnull); | |
e37a4fba MV |
3909 | exp = scm_copy_tree (exp); |
3910 | return SCM_XEVAL (exp, env); | |
68d8be66 MD |
3911 | } |
3912 | ||
3913 | SCM | |
4163eb72 | 3914 | scm_primitive_eval_x (SCM exp) |
0f2d19dd | 3915 | { |
4163eb72 MV |
3916 | SCM env = scm_top_level_env (scm_current_module_lookup_closure ()); |
3917 | return scm_i_eval_x (exp, env); | |
0f2d19dd JB |
3918 | } |
3919 | ||
4163eb72 MV |
3920 | SCM_DEFINE (scm_primitive_eval, "primitive-eval", 1, 0, 0, |
3921 | (SCM exp), | |
2069af38 | 3922 | "Evaluate @var{exp} in the top-level environment specified by\n" |
4163eb72 MV |
3923 | "the current module.") |
3924 | #define FUNC_NAME s_scm_primitive_eval | |
3925 | { | |
3926 | SCM env = scm_top_level_env (scm_current_module_lookup_closure ()); | |
3927 | return scm_i_eval (exp, env); | |
3928 | } | |
3929 | #undef FUNC_NAME | |
3930 | ||
68d8be66 MD |
3931 | /* Eval does not take the second arg optionally. This is intentional |
3932 | * in order to be R5RS compatible, and to prepare for the new module | |
3933 | * system, where we would like to make the choice of evaluation | |
4163eb72 | 3934 | * environment explicit. */ |
549e6ec6 | 3935 | |
09074dbf DH |
3936 | static void |
3937 | change_environment (void *data) | |
3938 | { | |
3939 | SCM pair = SCM_PACK (data); | |
3940 | SCM new_module = SCM_CAR (pair); | |
aa767bc5 | 3941 | SCM old_module = scm_current_module (); |
09074dbf | 3942 | SCM_SETCDR (pair, old_module); |
aa767bc5 | 3943 | scm_set_current_module (new_module); |
09074dbf DH |
3944 | } |
3945 | ||
3946 | ||
09074dbf DH |
3947 | static void |
3948 | restore_environment (void *data) | |
3949 | { | |
3950 | SCM pair = SCM_PACK (data); | |
3951 | SCM old_module = SCM_CDR (pair); | |
aa767bc5 | 3952 | SCM new_module = scm_current_module (); |
2e9c835d | 3953 | SCM_SETCAR (pair, new_module); |
aa767bc5 | 3954 | scm_set_current_module (old_module); |
09074dbf DH |
3955 | } |
3956 | ||
4163eb72 MV |
3957 | static SCM |
3958 | inner_eval_x (void *data) | |
3959 | { | |
3960 | return scm_primitive_eval_x (SCM_PACK(data)); | |
3961 | } | |
3962 | ||
3963 | SCM | |
3964 | scm_eval_x (SCM exp, SCM module) | |
3965 | #define FUNC_NAME "eval!" | |
3966 | { | |
3967 | SCM_VALIDATE_MODULE (2, module); | |
3968 | ||
3969 | return scm_internal_dynamic_wind | |
3970 | (change_environment, inner_eval_x, restore_environment, | |
3971 | (void *) SCM_UNPACK (exp), | |
3972 | (void *) SCM_UNPACK (scm_cons (module, SCM_BOOL_F))); | |
3973 | } | |
3974 | #undef FUNC_NAME | |
3975 | ||
3976 | static SCM | |
3977 | inner_eval (void *data) | |
3978 | { | |
3979 | return scm_primitive_eval (SCM_PACK(data)); | |
3980 | } | |
09074dbf | 3981 | |
68d8be66 | 3982 | SCM_DEFINE (scm_eval, "eval", 2, 0, 0, |
4163eb72 MV |
3983 | (SCM exp, SCM module), |
3984 | "Evaluate @var{exp}, a list representing a Scheme expression,\n" | |
3985 | "in the top-level environment specified by @var{module}.\n" | |
3986 | "While @var{exp} is evaluated (using @var{primitive-eval}),\n" | |
3987 | "@var{module} is made the current module. The current module\n" | |
3988 | "is reset to its previous value when @var{eval} returns.") | |
1bbd0b84 | 3989 | #define FUNC_NAME s_scm_eval |
0f2d19dd | 3990 | { |
4163eb72 | 3991 | SCM_VALIDATE_MODULE (2, module); |
09074dbf DH |
3992 | |
3993 | return scm_internal_dynamic_wind | |
3994 | (change_environment, inner_eval, restore_environment, | |
4163eb72 MV |
3995 | (void *) SCM_UNPACK (exp), |
3996 | (void *) SCM_UNPACK (scm_cons (module, SCM_BOOL_F))); | |
0f2d19dd | 3997 | } |
1bbd0b84 | 3998 | #undef FUNC_NAME |
0f2d19dd | 3999 | |
68d8be66 | 4000 | #if (SCM_DEBUG_DEPRECATED == 0) |
1cc91f1b | 4001 | |
aa767bc5 | 4002 | /* Use scm_current_module () or scm_interaction_environment () |
68d8be66 MD |
4003 | * instead. The former is the module selected during loading of code. |
4004 | * The latter is the module in which the user of this thread currently | |
4005 | * types expressions. | |
4006 | */ | |
4007 | ||
4008 | SCM scm_top_level_lookup_closure_var; | |
4009 | ||
4010 | /* Avoid using this functionality altogether (except for implementing | |
4011 | * libguile, where you can use scm_i_eval or scm_i_eval_x). | |
4012 | * | |
4163eb72 MV |
4013 | * Applications should use either C level scm_eval_x or Scheme |
4014 | * scm_eval; or scm_primitive_eval_x or scm_primitive_eval. */ | |
68d8be66 MD |
4015 | |
4016 | SCM | |
4017 | scm_eval_3 (SCM obj, int copyp, SCM env) | |
4018 | { | |
4019 | if (copyp) | |
4020 | return scm_i_eval (obj, env); | |
4021 | else | |
4022 | return scm_i_eval_x (obj, env); | |
4023 | } | |
4024 | ||
4025 | SCM_DEFINE (scm_eval2, "eval2", 2, 0, 0, | |
4026 | (SCM obj, SCM env_thunk), | |
4163eb72 MV |
4027 | "Evaluate @var{exp}, a Scheme expression, in the environment\n" |
4028 | "designated by @var{lookup}, a symbol-lookup function." | |
4029 | "Do not use this version of eval, it does not play well\n" | |
4030 | "with the module system. Use @code{eval} or\n" | |
4031 | "@code{primitive-eval} instead.") | |
68d8be66 | 4032 | #define FUNC_NAME s_scm_eval2 |
0f2d19dd | 4033 | { |
68d8be66 | 4034 | return scm_i_eval (obj, scm_top_level_env (env_thunk)); |
0f2d19dd | 4035 | } |
68d8be66 MD |
4036 | #undef FUNC_NAME |
4037 | ||
4038 | #endif /* DEPRECATED */ | |
0f2d19dd | 4039 | |
6dbd0af5 MD |
4040 | |
4041 | /* At this point, scm_deval and scm_dapply are generated. | |
4042 | */ | |
4043 | ||
0f2d19dd | 4044 | #ifdef DEBUG_EXTENSIONS |
6dbd0af5 MD |
4045 | # define DEVAL |
4046 | # include "eval.c" | |
0f2d19dd JB |
4047 | #endif |
4048 | ||
4049 | ||
1cc91f1b | 4050 | |
0f2d19dd JB |
4051 | void |
4052 | scm_init_eval () | |
0f2d19dd | 4053 | { |
33b97402 MD |
4054 | scm_init_opts (scm_evaluator_traps, |
4055 | scm_evaluator_trap_table, | |
4056 | SCM_N_EVALUATOR_TRAPS); | |
4057 | scm_init_opts (scm_eval_options_interface, | |
4058 | scm_eval_opts, | |
4059 | SCM_N_EVAL_OPTIONS); | |
4060 | ||
f99c9c28 MD |
4061 | scm_tc16_promise = scm_make_smob_type ("promise", 0); |
4062 | scm_set_smob_mark (scm_tc16_promise, scm_markcdr); | |
e841c3e0 | 4063 | scm_set_smob_print (scm_tc16_promise, promise_print); |
b8229a3b | 4064 | |
81123e6d | 4065 | scm_f_apply = scm_make_subr ("apply", scm_tc7_lsubr_2, scm_apply); |
549e6ec6 MD |
4066 | scm_system_transformer = scm_sysintern ("scm:eval-transformer", |
4067 | scm_make_fluid ()); | |
0f2d19dd | 4068 | |
43a912cf MD |
4069 | scm_lisp_nil = scm_sysintern ("nil", SCM_UNDEFINED); |
4070 | SCM_SETCDR (scm_lisp_nil, SCM_CAR (scm_lisp_nil)); | |
4071 | scm_lisp_nil = SCM_CAR (scm_lisp_nil); | |
4072 | scm_lisp_t = scm_sysintern ("t", SCM_UNDEFINED); | |
4073 | SCM_SETCDR (scm_lisp_t, SCM_CAR (scm_lisp_t)); | |
4074 | scm_lisp_t = SCM_CAR (scm_lisp_t); | |
73b64342 | 4075 | |
0f2d19dd | 4076 | /* acros */ |
0f2d19dd JB |
4077 | /* end of acros */ |
4078 | ||
68d8be66 | 4079 | #if SCM_DEBUG_DEPRECATED == 0 |
dc19d1d2 | 4080 | scm_top_level_lookup_closure_var = |
549e6ec6 | 4081 | scm_sysintern ("*top-level-lookup-closure*", scm_make_fluid ()); |
68d8be66 | 4082 | #endif |
0f2d19dd | 4083 | |
8dc9439f | 4084 | #ifndef SCM_MAGIC_SNARFER |
a0599745 | 4085 | #include "libguile/eval.x" |
8dc9439f | 4086 | #endif |
25eaf21a MD |
4087 | |
4088 | scm_add_feature ("delay"); | |
0f2d19dd | 4089 | } |
0f2d19dd | 4090 | |
6dbd0af5 | 4091 | #endif /* !DEVAL */ |
89e00824 ML |
4092 | |
4093 | /* | |
4094 | Local Variables: | |
4095 | c-file-style: "gnu" | |
4096 | End: | |
4097 | */ |