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22a52da1 | 1 | /* Copyright (C) 1995,1996,1997,1998,1999,2000,2001 Free Software Foundation, Inc. |
0f2d19dd JB |
2 | * |
3 | * This program is free software; you can redistribute it and/or modify | |
4 | * it under the terms of the GNU General Public License as published by | |
5 | * the Free Software Foundation; either version 2, or (at your option) | |
6 | * any later version. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this software; see the file COPYING. If not, write to | |
82892bed JB |
15 | * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, |
16 | * Boston, MA 02111-1307 USA | |
0f2d19dd JB |
17 | * |
18 | * As a special exception, the Free Software Foundation gives permission | |
19 | * for additional uses of the text contained in its release of GUILE. | |
20 | * | |
21 | * The exception is that, if you link the GUILE library with other files | |
22 | * to produce an executable, this does not by itself cause the | |
23 | * resulting executable to be covered by the GNU General Public License. | |
24 | * Your use of that executable is in no way restricted on account of | |
25 | * linking the GUILE library code into it. | |
26 | * | |
27 | * This exception does not however invalidate any other reasons why | |
28 | * the executable file might be covered by the GNU General Public License. | |
29 | * | |
30 | * This exception applies only to the code released by the | |
31 | * Free Software Foundation under the name GUILE. If you copy | |
32 | * code from other Free Software Foundation releases into a copy of | |
33 | * GUILE, as the General Public License permits, the exception does | |
34 | * not apply to the code that you add in this way. To avoid misleading | |
35 | * anyone as to the status of such modified files, you must delete | |
36 | * this exception notice from them. | |
37 | * | |
38 | * If you write modifications of your own for GUILE, it is your choice | |
39 | * whether to permit this exception to apply to your modifications. | |
82892bed | 40 | * If you do not wish that, delete this exception notice. */ |
1bbd0b84 GB |
41 | |
42 | /* Software engineering face-lift by Greg J. Badros, 11-Dec-1999, | |
43 | gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */ | |
44 | ||
0f2d19dd JB |
45 | \f |
46 | ||
6dbd0af5 MD |
47 | /* This file is read twice in order to produce debugging versions of |
48 | * scm_ceval and scm_apply. These functions, scm_deval and | |
49 | * scm_dapply, are produced when we define the preprocessor macro | |
50 | * DEVAL. The file is divided into sections which are treated | |
51 | * differently with respect to DEVAL. The heads of these sections are | |
52 | * marked with the string "SECTION:". | |
53 | */ | |
54 | ||
6dbd0af5 | 55 | /* SECTION: This code is compiled once. |
0f2d19dd JB |
56 | */ |
57 | ||
58 | #ifndef DEVAL | |
59 | ||
d16332b3 | 60 | /* We need this to get the definitions for HAVE_ALLOCA_H, etc. */ |
a0599745 | 61 | #include "libguile/scmconfig.h" |
d16332b3 | 62 | |
48b96f4b JB |
63 | /* AIX requires this to be the first thing in the file. The #pragma |
64 | directive is indented so pre-ANSI compilers will ignore it, rather | |
65 | than choke on it. */ | |
5862b540 | 66 | #ifndef __GNUC__ |
48b96f4b JB |
67 | # if HAVE_ALLOCA_H |
68 | # include <alloca.h> | |
69 | # else | |
70 | # ifdef _AIX | |
71 | #pragma alloca | |
72 | # else | |
73 | # ifndef alloca /* predefined by HP cc +Olibcalls */ | |
74 | char *alloca (); | |
75 | # endif | |
76 | # endif | |
77 | # endif | |
78 | #endif | |
79 | ||
a0599745 MD |
80 | #include "libguile/_scm.h" |
81 | #include "libguile/debug.h" | |
09074dbf | 82 | #include "libguile/dynwind.h" |
a0599745 MD |
83 | #include "libguile/alist.h" |
84 | #include "libguile/eq.h" | |
85 | #include "libguile/continuations.h" | |
86 | #include "libguile/throw.h" | |
87 | #include "libguile/smob.h" | |
88 | #include "libguile/macros.h" | |
89 | #include "libguile/procprop.h" | |
90 | #include "libguile/hashtab.h" | |
91 | #include "libguile/hash.h" | |
92 | #include "libguile/srcprop.h" | |
93 | #include "libguile/stackchk.h" | |
94 | #include "libguile/objects.h" | |
95 | #include "libguile/async.h" | |
96 | #include "libguile/feature.h" | |
97 | #include "libguile/modules.h" | |
98 | #include "libguile/ports.h" | |
99 | #include "libguile/root.h" | |
100 | #include "libguile/vectors.h" | |
549e6ec6 | 101 | #include "libguile/fluids.h" |
a513ead3 | 102 | #include "libguile/values.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 | |
22a52da1 | 152 | #define EVALCAR(x, env) (!SCM_CELLP (SCM_CAR (x)) \ |
7d2b68a8 MD |
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 | 266 | register SCM *al, fl, var = SCM_CAR (vloc); |
0f2d19dd JB |
267 | #ifdef MEMOIZE_LOCALS |
268 | register SCM iloc = SCM_ILOC00; | |
269 | #endif | |
270 | for (; SCM_NIMP (env); env = SCM_CDR (env)) | |
271 | { | |
790071cd | 272 | if (!SCM_CONSP (SCM_CAR (env))) |
0f2d19dd | 273 | break; |
a23afe53 | 274 | al = SCM_CARLOC (env); |
0f2d19dd JB |
275 | for (fl = SCM_CAR (*al); SCM_NIMP (fl); fl = SCM_CDR (fl)) |
276 | { | |
277 | if (SCM_NCONSP (fl)) | |
33b97402 | 278 | { |
cf498326 | 279 | if (SCM_EQ_P (fl, var)) |
0f2d19dd JB |
280 | { |
281 | #ifdef MEMOIZE_LOCALS | |
f8769b1d | 282 | #ifdef USE_THREADS |
cf498326 | 283 | if (! SCM_EQ_P (SCM_CAR (vloc), var)) |
f8769b1d MV |
284 | goto race; |
285 | #endif | |
3201d763 | 286 | SCM_SET_CELL_WORD_0 (vloc, SCM_UNPACK (iloc) + SCM_ICDR); |
0f2d19dd | 287 | #endif |
a23afe53 | 288 | return SCM_CDRLOC (*al); |
0f2d19dd | 289 | } |
33b97402 MD |
290 | else |
291 | break; | |
292 | } | |
a23afe53 | 293 | al = SCM_CDRLOC (*al); |
cf498326 | 294 | if (SCM_EQ_P (SCM_CAR (fl), var)) |
0f2d19dd JB |
295 | { |
296 | #ifdef MEMOIZE_LOCALS | |
cf7c17e9 | 297 | #ifndef SCM_RECKLESS /* letrec inits to SCM_UNDEFINED */ |
0f2d19dd JB |
298 | if (SCM_UNBNDP (SCM_CAR (*al))) |
299 | { | |
300 | env = SCM_EOL; | |
301 | goto errout; | |
302 | } | |
f8769b1d MV |
303 | #endif |
304 | #ifdef USE_THREADS | |
305 | if (SCM_CAR (vloc) != var) | |
306 | goto race; | |
0f2d19dd | 307 | #endif |
a23afe53 | 308 | SCM_SETCAR (vloc, iloc); |
0f2d19dd | 309 | #endif |
a23afe53 | 310 | return SCM_CARLOC (*al); |
0f2d19dd JB |
311 | } |
312 | #ifdef MEMOIZE_LOCALS | |
3201d763 | 313 | iloc = SCM_PACK (SCM_UNPACK (iloc) + SCM_IDINC); |
0f2d19dd JB |
314 | #endif |
315 | } | |
316 | #ifdef MEMOIZE_LOCALS | |
3201d763 | 317 | iloc = SCM_PACK ((~SCM_IDSTMSK) & (SCM_UNPACK(iloc) + SCM_IFRINC)); |
0f2d19dd JB |
318 | #endif |
319 | } | |
320 | { | |
86d31dfe | 321 | SCM top_thunk, real_var; |
790071cd | 322 | if (SCM_NIMP (env)) |
0f2d19dd | 323 | { |
86d31dfe MV |
324 | top_thunk = SCM_CAR (env); /* env now refers to a |
325 | top level env thunk */ | |
0f2d19dd JB |
326 | env = SCM_CDR (env); |
327 | } | |
328 | else | |
329 | top_thunk = SCM_BOOL_F; | |
86d31dfe MV |
330 | real_var = scm_sym2var (var, top_thunk, SCM_BOOL_F); |
331 | if (SCM_FALSEP (real_var)) | |
0f2d19dd | 332 | goto errout; |
86d31dfe | 333 | |
cf7c17e9 | 334 | #ifndef SCM_RECKLESS |
86d31dfe MV |
335 | if (SCM_NNULLP (env) || SCM_UNBNDP (SCM_VARIABLE_REF (real_var))) |
336 | { | |
337 | errout: | |
338 | /* scm_everr (vloc, genv,...) */ | |
339 | if (check) | |
340 | { | |
341 | if (SCM_NULLP (env)) | |
342 | scm_error (scm_unbound_variable_key, NULL, | |
343 | "Unbound variable: ~S", | |
344 | scm_cons (var, SCM_EOL), SCM_BOOL_F); | |
345 | else | |
346 | scm_misc_error (NULL, "Damaged environment: ~S", | |
347 | scm_cons (var, SCM_EOL)); | |
348 | } | |
349 | else | |
350 | { | |
351 | /* A variable could not be found, but we shall | |
352 | not throw an error. */ | |
353 | static SCM undef_object = SCM_UNDEFINED; | |
354 | return &undef_object; | |
355 | } | |
09e4d064 | 356 | } |
0f2d19dd | 357 | #endif |
86d31dfe | 358 | |
f8769b1d | 359 | #ifdef USE_THREADS |
86d31dfe MV |
360 | if (SCM_CAR (vloc) != var) |
361 | { | |
362 | /* Some other thread has changed the very cell we are working | |
363 | on. In effect, it must have done our job or messed it up | |
364 | completely. */ | |
365 | race: | |
366 | var = SCM_CAR (vloc); | |
367 | if (SCM_ITAG3 (var) == scm_tc3_cons_gloc) | |
368 | return SCM_GLOC_VAL_LOC (var); | |
f8769b1d | 369 | #ifdef MEMOIZE_LOCALS |
86d31dfe MV |
370 | if (SCM_ITAG7 (var) == SCM_ITAG7 (SCM_ILOC00)) |
371 | return scm_ilookup (var, genv); | |
f8769b1d | 372 | #endif |
86d31dfe MV |
373 | /* We can't cope with anything else than glocs and ilocs. When |
374 | a special form has been memoized (i.e. `let' into `#@let') we | |
375 | return NULL and expect the calling function to do the right | |
376 | thing. For the evaluator, this means going back and redoing | |
377 | the dispatch on the car of the form. */ | |
378 | return NULL; | |
379 | } | |
f8769b1d MV |
380 | #endif /* USE_THREADS */ |
381 | ||
86d31dfe MV |
382 | SCM_SET_CELL_WORD_0 (vloc, SCM_UNPACK (real_var) + scm_tc3_cons_gloc); |
383 | return SCM_VARIABLE_LOC (real_var); | |
384 | } | |
0f2d19dd JB |
385 | } |
386 | ||
f8769b1d MV |
387 | #ifdef USE_THREADS |
388 | SCM * | |
6e8d25a6 | 389 | scm_lookupcar (SCM vloc, SCM genv, int check) |
f8769b1d | 390 | { |
26d5b9b4 | 391 | SCM *loc = scm_lookupcar1 (vloc, genv, check); |
f8769b1d MV |
392 | if (loc == NULL) |
393 | abort (); | |
394 | return loc; | |
395 | } | |
f8769b1d MV |
396 | #endif |
397 | ||
0f2d19dd | 398 | #define unmemocar scm_unmemocar |
1cc91f1b | 399 | |
86d31dfe MV |
400 | SCM_SYMBOL (sym_three_question_marks, "???"); |
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) |
86d31dfe MV |
411 | { |
412 | SCM sym = | |
413 | scm_module_reverse_lookup (scm_env_module (env), SCM_GLOC_VAR (c)); | |
414 | if (sym == SCM_BOOL_F) | |
415 | sym = sym_three_question_marks; | |
416 | SCM_SETCAR (form, sym); | |
417 | } | |
0f2d19dd | 418 | #ifdef MEMOIZE_LOCALS |
6dbd0af5 | 419 | #ifdef DEBUG_EXTENSIONS |
0f2d19dd JB |
420 | else if (SCM_ILOCP (c)) |
421 | { | |
b0c54567 DH |
422 | int ir; |
423 | ||
0f2d19dd JB |
424 | for (ir = SCM_IFRAME (c); ir != 0; --ir) |
425 | env = SCM_CDR (env); | |
426 | env = SCM_CAR (SCM_CAR (env)); | |
427 | for (ir = SCM_IDIST (c); ir != 0; --ir) | |
428 | env = SCM_CDR (env); | |
a23afe53 | 429 | SCM_SETCAR (form, SCM_ICDRP (c) ? env : SCM_CAR (env)); |
0f2d19dd | 430 | } |
6dbd0af5 | 431 | #endif |
0f2d19dd JB |
432 | #endif |
433 | return form; | |
434 | } | |
435 | ||
1cc91f1b | 436 | |
0f2d19dd | 437 | SCM |
6e8d25a6 | 438 | scm_eval_car (SCM pair, SCM env) |
0f2d19dd | 439 | { |
6cb702da | 440 | return SCM_XEVALCAR (pair, env); |
0f2d19dd JB |
441 | } |
442 | ||
443 | \f | |
444 | /* | |
445 | * The following rewrite expressions and | |
446 | * some memoized forms have different syntax | |
447 | */ | |
448 | ||
3eeba8d4 JB |
449 | const char scm_s_expression[] = "missing or extra expression"; |
450 | const char scm_s_test[] = "bad test"; | |
451 | const char scm_s_body[] = "bad body"; | |
452 | const char scm_s_bindings[] = "bad bindings"; | |
185ab0ef | 453 | const char scm_s_duplicate_bindings[] = "duplicate bindings"; |
3eeba8d4 JB |
454 | const char scm_s_variable[] = "bad variable"; |
455 | const char scm_s_clauses[] = "bad or missing clauses"; | |
456 | const char scm_s_formals[] = "bad formals"; | |
5280aaca | 457 | const char scm_s_duplicate_formals[] = "duplicate formals"; |
0f2d19dd | 458 | |
85db4a2c DH |
459 | SCM_GLOBAL_SYMBOL (scm_sym_dot, "."); |
460 | SCM_GLOBAL_SYMBOL (scm_sym_arrow, "=>"); | |
461 | SCM_GLOBAL_SYMBOL (scm_sym_else, "else"); | |
462 | SCM_GLOBAL_SYMBOL (scm_sym_unquote, "unquote"); | |
463 | SCM_GLOBAL_SYMBOL (scm_sym_uq_splicing, "unquote-splicing"); | |
81123e6d MD |
464 | |
465 | SCM scm_f_apply; | |
b8229a3b | 466 | |
6dbd0af5 | 467 | #ifdef DEBUG_EXTENSIONS |
85db4a2c DH |
468 | SCM_GLOBAL_SYMBOL (scm_sym_enter_frame, "enter-frame"); |
469 | SCM_GLOBAL_SYMBOL (scm_sym_apply_frame, "apply-frame"); | |
470 | SCM_GLOBAL_SYMBOL (scm_sym_exit_frame, "exit-frame"); | |
471 | SCM_GLOBAL_SYMBOL (scm_sym_trace, "trace"); | |
6dbd0af5 | 472 | #endif |
0f2d19dd | 473 | |
0f2d19dd | 474 | |
26d5b9b4 MD |
475 | /* Check that the body denoted by XORIG is valid and rewrite it into |
476 | its internal form. The internal form of a body is just the body | |
477 | itself, but prefixed with an ISYM that denotes to what kind of | |
478 | outer construct this body belongs. A lambda body starts with | |
479 | SCM_IM_LAMBDA, for example, a body of a let starts with SCM_IM_LET, | |
480 | etc. The one exception is a body that belongs to a letrec that has | |
481 | been formed by rewriting internal defines: it starts with | |
482 | SCM_IM_DEFINE. */ | |
483 | ||
484 | /* XXX - Besides controlling the rewriting of internal defines, the | |
485 | additional ISYM could be used for improved error messages. | |
486 | This is not done yet. */ | |
487 | ||
488 | static SCM | |
6e8d25a6 | 489 | scm_m_body (SCM op, SCM xorig, const char *what) |
26d5b9b4 | 490 | { |
160bb34a | 491 | SCM_ASSYNT (scm_ilength (xorig) >= 1, scm_s_expression, what); |
26d5b9b4 MD |
492 | |
493 | /* Don't add another ISYM if one is present already. */ | |
494 | if (SCM_ISYMP (SCM_CAR (xorig))) | |
495 | return xorig; | |
496 | ||
497 | /* Retain possible doc string. */ | |
44d3cb0d | 498 | if (!SCM_CONSP (SCM_CAR (xorig))) |
26d5b9b4 MD |
499 | { |
500 | if (SCM_NNULLP (SCM_CDR(xorig))) | |
501 | return scm_cons (SCM_CAR (xorig), | |
502 | scm_m_body (op, SCM_CDR(xorig), what)); | |
503 | return xorig; | |
504 | } | |
505 | ||
ab66ae47 | 506 | return scm_cons (op, xorig); |
26d5b9b4 MD |
507 | } |
508 | ||
b8229a3b | 509 | SCM_SYNTAX(s_quote,"quote", scm_makmmacro, scm_m_quote); |
2f0d1375 | 510 | SCM_GLOBAL_SYMBOL(scm_sym_quote, s_quote); |
1cc91f1b | 511 | |
0f2d19dd | 512 | SCM |
6e8d25a6 | 513 | scm_m_quote (SCM xorig, SCM env) |
0f2d19dd | 514 | { |
26d5b9b4 MD |
515 | SCM x = scm_copy_tree (SCM_CDR (xorig)); |
516 | ||
160bb34a | 517 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, scm_s_expression, s_quote); |
3a3111a8 | 518 | return scm_cons (SCM_IM_QUOTE, x); |
0f2d19dd JB |
519 | } |
520 | ||
521 | ||
1cc91f1b | 522 | |
b8229a3b | 523 | SCM_SYNTAX(s_begin, "begin", scm_makmmacro, scm_m_begin); |
2f0d1375 | 524 | SCM_GLOBAL_SYMBOL(scm_sym_begin, s_begin); |
b8229a3b | 525 | |
0f2d19dd | 526 | SCM |
6e8d25a6 | 527 | scm_m_begin (SCM xorig, SCM env) |
0f2d19dd | 528 | { |
160bb34a | 529 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) >= 1, scm_s_expression, s_begin); |
3a3111a8 | 530 | return scm_cons (SCM_IM_BEGIN, SCM_CDR (xorig)); |
0f2d19dd JB |
531 | } |
532 | ||
b8229a3b | 533 | SCM_SYNTAX(s_if, "if", scm_makmmacro, scm_m_if); |
2f0d1375 | 534 | SCM_GLOBAL_SYMBOL(scm_sym_if, s_if); |
1cc91f1b | 535 | |
0f2d19dd | 536 | SCM |
6e8d25a6 | 537 | scm_m_if (SCM xorig, SCM env) |
0f2d19dd JB |
538 | { |
539 | int len = scm_ilength (SCM_CDR (xorig)); | |
160bb34a | 540 | SCM_ASSYNT (len >= 2 && len <= 3, scm_s_expression, "if"); |
3a3111a8 | 541 | return scm_cons (SCM_IM_IF, SCM_CDR (xorig)); |
0f2d19dd JB |
542 | } |
543 | ||
544 | ||
89efbff4 MD |
545 | /* Will go into the RnRS module when Guile is factorized. |
546 | SCM_SYNTAX(scm_s_set_x,"set!", scm_makmmacro, scm_m_set_x); */ | |
547 | const char scm_s_set_x[] = "set!"; | |
548 | SCM_GLOBAL_SYMBOL(scm_sym_set_x, scm_s_set_x); | |
1cc91f1b | 549 | |
0f2d19dd | 550 | SCM |
6e8d25a6 | 551 | scm_m_set_x (SCM xorig, SCM env) |
0f2d19dd | 552 | { |
6dbd0af5 | 553 | SCM x = SCM_CDR (xorig); |
160bb34a DH |
554 | SCM_ASSYNT (2 == scm_ilength (x), scm_s_expression, scm_s_set_x); |
555 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (x)), scm_s_variable, scm_s_set_x); | |
3a3111a8 | 556 | return scm_cons (SCM_IM_SET_X, x); |
0f2d19dd JB |
557 | } |
558 | ||
559 | ||
b8229a3b | 560 | SCM_SYNTAX(s_and, "and", scm_makmmacro, scm_m_and); |
2f0d1375 | 561 | SCM_GLOBAL_SYMBOL(scm_sym_and, s_and); |
1cc91f1b | 562 | |
0f2d19dd | 563 | SCM |
6e8d25a6 | 564 | scm_m_and (SCM xorig, SCM env) |
0f2d19dd JB |
565 | { |
566 | int len = scm_ilength (SCM_CDR (xorig)); | |
160bb34a | 567 | SCM_ASSYNT (len >= 0, scm_s_test, s_and); |
0f2d19dd | 568 | if (len >= 1) |
3a3111a8 | 569 | return scm_cons (SCM_IM_AND, SCM_CDR (xorig)); |
0f2d19dd JB |
570 | else |
571 | return SCM_BOOL_T; | |
572 | } | |
573 | ||
b8229a3b | 574 | SCM_SYNTAX(s_or,"or", scm_makmmacro, scm_m_or); |
2f0d1375 | 575 | SCM_GLOBAL_SYMBOL(scm_sym_or,s_or); |
1cc91f1b | 576 | |
0f2d19dd | 577 | SCM |
6e8d25a6 | 578 | scm_m_or (SCM xorig, SCM env) |
0f2d19dd JB |
579 | { |
580 | int len = scm_ilength (SCM_CDR (xorig)); | |
160bb34a | 581 | SCM_ASSYNT (len >= 0, scm_s_test, s_or); |
0f2d19dd | 582 | if (len >= 1) |
3a3111a8 | 583 | return scm_cons (SCM_IM_OR, SCM_CDR (xorig)); |
0f2d19dd JB |
584 | else |
585 | return SCM_BOOL_F; | |
586 | } | |
587 | ||
588 | ||
b8229a3b | 589 | SCM_SYNTAX(s_case, "case", scm_makmmacro, scm_m_case); |
2f0d1375 | 590 | SCM_GLOBAL_SYMBOL(scm_sym_case, s_case); |
1cc91f1b | 591 | |
0f2d19dd | 592 | SCM |
6e8d25a6 | 593 | scm_m_case (SCM xorig, SCM env) |
0f2d19dd | 594 | { |
26d5b9b4 | 595 | SCM proc, cdrx = scm_list_copy (SCM_CDR (xorig)), x = cdrx; |
160bb34a | 596 | SCM_ASSYNT (scm_ilength (x) >= 2, scm_s_clauses, s_case); |
0f2d19dd JB |
597 | while (SCM_NIMP (x = SCM_CDR (x))) |
598 | { | |
599 | proc = SCM_CAR (x); | |
160bb34a | 600 | SCM_ASSYNT (scm_ilength (proc) >= 2, scm_s_clauses, s_case); |
6cb702da | 601 | SCM_ASSYNT (scm_ilength (SCM_CAR (proc)) >= 0 |
4567ed78 DH |
602 | || (SCM_EQ_P (scm_sym_else, SCM_CAR (proc)) |
603 | && SCM_NULLP (SCM_CDR (x))), | |
160bb34a | 604 | scm_s_clauses, s_case); |
0f2d19dd | 605 | } |
3a3111a8 | 606 | return scm_cons (SCM_IM_CASE, cdrx); |
0f2d19dd JB |
607 | } |
608 | ||
609 | ||
b8229a3b | 610 | SCM_SYNTAX(s_cond, "cond", scm_makmmacro, scm_m_cond); |
2f0d1375 | 611 | SCM_GLOBAL_SYMBOL(scm_sym_cond, s_cond); |
b8229a3b | 612 | |
1cc91f1b | 613 | |
0f2d19dd | 614 | SCM |
6e8d25a6 | 615 | scm_m_cond (SCM xorig, SCM env) |
0f2d19dd | 616 | { |
26d5b9b4 | 617 | SCM arg1, cdrx = scm_list_copy (SCM_CDR (xorig)), x = cdrx; |
0f2d19dd | 618 | int len = scm_ilength (x); |
160bb34a | 619 | SCM_ASSYNT (len >= 1, scm_s_clauses, s_cond); |
0f2d19dd JB |
620 | while (SCM_NIMP (x)) |
621 | { | |
622 | arg1 = SCM_CAR (x); | |
623 | len = scm_ilength (arg1); | |
160bb34a | 624 | SCM_ASSYNT (len >= 1, scm_s_clauses, s_cond); |
cf498326 | 625 | if (SCM_EQ_P (scm_sym_else, SCM_CAR (arg1))) |
0f2d19dd | 626 | { |
6cb702da | 627 | SCM_ASSYNT (SCM_NULLP (SCM_CDR (x)) && len >= 2, |
160bb34a | 628 | "bad ELSE clause", s_cond); |
a23afe53 | 629 | SCM_SETCAR (arg1, SCM_BOOL_T); |
0f2d19dd | 630 | } |
cf498326 | 631 | if (len >= 2 && SCM_EQ_P (scm_sym_arrow, SCM_CAR (SCM_CDR (arg1)))) |
6cb702da | 632 | SCM_ASSYNT (3 == len && SCM_NIMP (SCM_CAR (SCM_CDR (SCM_CDR (arg1)))), |
160bb34a | 633 | "bad recipient", s_cond); |
0f2d19dd JB |
634 | x = SCM_CDR (x); |
635 | } | |
3a3111a8 | 636 | return scm_cons (SCM_IM_COND, cdrx); |
0f2d19dd JB |
637 | } |
638 | ||
b8229a3b | 639 | SCM_SYNTAX(s_lambda, "lambda", scm_makmmacro, scm_m_lambda); |
2f0d1375 | 640 | SCM_GLOBAL_SYMBOL(scm_sym_lambda, s_lambda); |
1cc91f1b | 641 | |
5280aaca MV |
642 | /* Return #t if OBJ is `eq?' to one of the elements of LIST or to the |
643 | cdr of the last cons. (Thus, LIST is not required to be a proper | |
644 | list and when OBJ also found in the improper ending.) */ | |
645 | ||
646 | static int | |
647 | scm_c_improper_memq (SCM obj, SCM list) | |
648 | { | |
649 | for (; SCM_CONSP (list); list = SCM_CDR (list)) | |
650 | { | |
651 | if (SCM_EQ_P (SCM_CAR (list), obj)) | |
652 | return SCM_BOOL_T; | |
653 | } | |
654 | return SCM_EQ_P (list, obj); | |
655 | } | |
656 | ||
0f2d19dd | 657 | SCM |
6e8d25a6 | 658 | scm_m_lambda (SCM xorig, SCM env) |
0f2d19dd JB |
659 | { |
660 | SCM proc, x = SCM_CDR (xorig); | |
26d5b9b4 | 661 | if (scm_ilength (x) < 2) |
0f2d19dd JB |
662 | goto badforms; |
663 | proc = SCM_CAR (x); | |
33b97402 MD |
664 | if (SCM_NULLP (proc)) |
665 | goto memlambda; | |
cf498326 | 666 | if (SCM_EQ_P (SCM_IM_LET, proc)) /* named let */ |
26d5b9b4 | 667 | goto memlambda; |
33b97402 MD |
668 | if (SCM_IMP (proc)) |
669 | goto badforms; | |
670 | if (SCM_SYMBOLP (proc)) | |
671 | goto memlambda; | |
672 | if (SCM_NCONSP (proc)) | |
673 | goto badforms; | |
674 | while (SCM_NIMP (proc)) | |
0f2d19dd | 675 | { |
33b97402 MD |
676 | if (SCM_NCONSP (proc)) |
677 | { | |
0f2d19dd | 678 | if (!SCM_SYMBOLP (proc)) |
33b97402 MD |
679 | goto badforms; |
680 | else | |
681 | goto memlambda; | |
682 | } | |
0c95b57d | 683 | if (!SCM_SYMBOLP (SCM_CAR (proc))) |
0f2d19dd | 684 | goto badforms; |
5280aaca | 685 | else if (scm_c_improper_memq (SCM_CAR(proc), SCM_CDR(proc))) |
db4b4ca6 | 686 | scm_misc_error (s_lambda, scm_s_duplicate_formals, SCM_EOL); |
0f2d19dd JB |
687 | proc = SCM_CDR (proc); |
688 | } | |
ff467021 | 689 | if (SCM_NNULLP (proc)) |
26d5b9b4 MD |
690 | { |
691 | badforms: | |
db4b4ca6 | 692 | scm_misc_error (s_lambda, scm_s_formals, SCM_EOL); |
26d5b9b4 MD |
693 | } |
694 | ||
695 | memlambda: | |
3a3111a8 MD |
696 | return scm_cons2 (SCM_IM_LAMBDA, SCM_CAR (x), |
697 | scm_m_body (SCM_IM_LAMBDA, SCM_CDR (x), s_lambda)); | |
0f2d19dd JB |
698 | } |
699 | ||
b8229a3b | 700 | SCM_SYNTAX(s_letstar,"let*", scm_makmmacro, scm_m_letstar); |
2f0d1375 | 701 | SCM_GLOBAL_SYMBOL(scm_sym_letstar,s_letstar); |
0f2d19dd | 702 | |
1cc91f1b | 703 | |
0f2d19dd | 704 | SCM |
6e8d25a6 | 705 | scm_m_letstar (SCM xorig, SCM env) |
0f2d19dd JB |
706 | { |
707 | SCM x = SCM_CDR (xorig), arg1, proc, vars = SCM_EOL, *varloc = &vars; | |
708 | int len = scm_ilength (x); | |
160bb34a | 709 | SCM_ASSYNT (len >= 2, scm_s_body, s_letstar); |
0f2d19dd | 710 | proc = SCM_CAR (x); |
160bb34a | 711 | SCM_ASSYNT (scm_ilength (proc) >= 0, scm_s_bindings, s_letstar); |
ff467021 | 712 | while (SCM_NIMP (proc)) |
0f2d19dd JB |
713 | { |
714 | arg1 = SCM_CAR (proc); | |
160bb34a DH |
715 | SCM_ASSYNT (2 == scm_ilength (arg1), scm_s_bindings, s_letstar); |
716 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (arg1)), scm_s_variable, s_letstar); | |
0f2d19dd | 717 | *varloc = scm_cons2 (SCM_CAR (arg1), SCM_CAR (SCM_CDR (arg1)), SCM_EOL); |
a23afe53 | 718 | varloc = SCM_CDRLOC (SCM_CDR (*varloc)); |
0f2d19dd JB |
719 | proc = SCM_CDR (proc); |
720 | } | |
721 | x = scm_cons (vars, SCM_CDR (x)); | |
26d5b9b4 | 722 | |
3a3111a8 MD |
723 | return scm_cons2 (SCM_IM_LETSTAR, SCM_CAR (x), |
724 | scm_m_body (SCM_IM_LETSTAR, SCM_CDR (x), s_letstar)); | |
0f2d19dd JB |
725 | } |
726 | ||
727 | /* DO gets the most radically altered syntax | |
728 | (do ((<var1> <init1> <step1>) | |
729 | (<var2> <init2>) | |
730 | ... ) | |
731 | (<test> <return>) | |
732 | <body>) | |
733 | ;; becomes | |
734 | (do_mem (varn ... var2 var1) | |
735 | (<init1> <init2> ... <initn>) | |
736 | (<test> <return>) | |
737 | (<body>) | |
738 | <step1> <step2> ... <stepn>) ;; missing steps replaced by var | |
739 | */ | |
740 | ||
b8229a3b | 741 | SCM_SYNTAX(s_do, "do", scm_makmmacro, scm_m_do); |
2f0d1375 | 742 | SCM_GLOBAL_SYMBOL(scm_sym_do, s_do); |
1cc91f1b | 743 | |
0f2d19dd | 744 | SCM |
6e8d25a6 | 745 | scm_m_do (SCM xorig, SCM env) |
0f2d19dd JB |
746 | { |
747 | SCM x = SCM_CDR (xorig), arg1, proc; | |
748 | SCM vars = SCM_EOL, inits = SCM_EOL, steps = SCM_EOL; | |
749 | SCM *initloc = &inits, *steploc = &steps; | |
750 | int len = scm_ilength (x); | |
160bb34a | 751 | SCM_ASSYNT (len >= 2, scm_s_test, "do"); |
0f2d19dd | 752 | proc = SCM_CAR (x); |
160bb34a | 753 | SCM_ASSYNT (scm_ilength (proc) >= 0, scm_s_bindings, "do"); |
ff467021 | 754 | while (SCM_NIMP(proc)) |
0f2d19dd JB |
755 | { |
756 | arg1 = SCM_CAR (proc); | |
757 | len = scm_ilength (arg1); | |
160bb34a DH |
758 | SCM_ASSYNT (2 == len || 3 == len, scm_s_bindings, "do"); |
759 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (arg1)), scm_s_variable, "do"); | |
0f2d19dd JB |
760 | /* vars reversed here, inits and steps reversed at evaluation */ |
761 | vars = scm_cons (SCM_CAR (arg1), vars); /* variable */ | |
762 | arg1 = SCM_CDR (arg1); | |
763 | *initloc = scm_cons (SCM_CAR (arg1), SCM_EOL); /* init */ | |
a23afe53 | 764 | initloc = SCM_CDRLOC (*initloc); |
0f2d19dd JB |
765 | arg1 = SCM_CDR (arg1); |
766 | *steploc = scm_cons (SCM_IMP (arg1) ? SCM_CAR (vars) : SCM_CAR (arg1), SCM_EOL); /* step */ | |
a23afe53 | 767 | steploc = SCM_CDRLOC (*steploc); |
0f2d19dd JB |
768 | proc = SCM_CDR (proc); |
769 | } | |
770 | x = SCM_CDR (x); | |
160bb34a | 771 | SCM_ASSYNT (scm_ilength (SCM_CAR (x)) >= 1, scm_s_test, "do"); |
0f2d19dd JB |
772 | x = scm_cons2 (SCM_CAR (x), SCM_CDR (x), steps); |
773 | x = scm_cons2 (vars, inits, x); | |
3a3111a8 | 774 | return scm_cons (SCM_IM_DO, x); |
0f2d19dd JB |
775 | } |
776 | ||
6dbd0af5 MD |
777 | /* evalcar is small version of inline EVALCAR when we don't care about |
778 | * speed | |
779 | */ | |
780 | #define evalcar scm_eval_car | |
0f2d19dd | 781 | |
1cc91f1b | 782 | |
1bbd0b84 | 783 | static SCM iqq (SCM form, SCM env, int depth); |
1cc91f1b | 784 | |
b8229a3b | 785 | SCM_SYNTAX(s_quasiquote, "quasiquote", scm_makacro, scm_m_quasiquote); |
2f0d1375 | 786 | SCM_GLOBAL_SYMBOL(scm_sym_quasiquote, s_quasiquote); |
b8229a3b MS |
787 | |
788 | SCM | |
6e8d25a6 | 789 | scm_m_quasiquote (SCM xorig, SCM env) |
b8229a3b MS |
790 | { |
791 | SCM x = SCM_CDR (xorig); | |
160bb34a | 792 | SCM_ASSYNT (scm_ilength (x) == 1, scm_s_expression, s_quasiquote); |
b8229a3b MS |
793 | return iqq (SCM_CAR (x), env, 1); |
794 | } | |
795 | ||
796 | ||
0f2d19dd | 797 | static SCM |
22a52da1 | 798 | iqq (SCM form, SCM env, int depth) |
0f2d19dd JB |
799 | { |
800 | SCM tmp; | |
801 | int edepth = depth; | |
22a52da1 | 802 | if (SCM_IMP (form)) |
ff467021 | 803 | return form; |
0f2d19dd JB |
804 | if (SCM_VECTORP (form)) |
805 | { | |
b5c2579a | 806 | long i = SCM_VECTOR_LENGTH (form); |
0f2d19dd JB |
807 | SCM *data = SCM_VELTS (form); |
808 | tmp = SCM_EOL; | |
809 | for (; --i >= 0;) | |
810 | tmp = scm_cons (data[i], tmp); | |
811 | return scm_vector (iqq (tmp, env, depth)); | |
812 | } | |
22a52da1 | 813 | if (!SCM_CONSP (form)) |
ff467021 | 814 | return form; |
0f2d19dd | 815 | tmp = SCM_CAR (form); |
cf498326 | 816 | if (SCM_EQ_P (scm_sym_quasiquote, tmp)) |
0f2d19dd JB |
817 | { |
818 | depth++; | |
819 | goto label; | |
820 | } | |
cf498326 | 821 | if (SCM_EQ_P (scm_sym_unquote, tmp)) |
0f2d19dd JB |
822 | { |
823 | --depth; | |
824 | label: | |
825 | form = SCM_CDR (form); | |
0c95b57d GB |
826 | SCM_ASSERT (SCM_ECONSP (form) && SCM_NULLP (SCM_CDR (form)), |
827 | form, SCM_ARG1, s_quasiquote); | |
0f2d19dd JB |
828 | if (0 == depth) |
829 | return evalcar (form, env); | |
830 | return scm_cons2 (tmp, iqq (SCM_CAR (form), env, depth), SCM_EOL); | |
831 | } | |
22a52da1 | 832 | if (SCM_CONSP (tmp) && (SCM_EQ_P (scm_sym_uq_splicing, SCM_CAR (tmp)))) |
0f2d19dd JB |
833 | { |
834 | tmp = SCM_CDR (tmp); | |
835 | if (0 == --edepth) | |
836 | return scm_append (scm_cons2 (evalcar (tmp, env), iqq (SCM_CDR (form), env, depth), SCM_EOL)); | |
837 | } | |
838 | return scm_cons (iqq (SCM_CAR (form), env, edepth), iqq (SCM_CDR (form), env, depth)); | |
839 | } | |
840 | ||
841 | /* Here are acros which return values rather than code. */ | |
842 | ||
a570e93a MD |
843 | SCM_SYNTAX (s_delay, "delay", scm_makmmacro, scm_m_delay); |
844 | SCM_GLOBAL_SYMBOL (scm_sym_delay, s_delay); | |
1cc91f1b | 845 | |
0f2d19dd | 846 | SCM |
6e8d25a6 | 847 | scm_m_delay (SCM xorig, SCM env) |
0f2d19dd | 848 | { |
160bb34a | 849 | SCM_ASSYNT (scm_ilength (xorig) == 2, scm_s_expression, s_delay); |
a570e93a | 850 | return scm_cons2 (SCM_IM_DELAY, SCM_EOL, SCM_CDR (xorig)); |
0f2d19dd JB |
851 | } |
852 | ||
1cc91f1b | 853 | |
b8229a3b | 854 | SCM_SYNTAX(s_define, "define", scm_makmmacro, scm_m_define); |
2f0d1375 | 855 | SCM_GLOBAL_SYMBOL(scm_sym_define, s_define); |
1cc91f1b | 856 | |
0f2d19dd | 857 | SCM |
6e8d25a6 | 858 | scm_m_define (SCM x, SCM env) |
0f2d19dd JB |
859 | { |
860 | SCM proc, arg1 = x; | |
861 | x = SCM_CDR (x); | |
160bb34a | 862 | SCM_ASSYNT (scm_ilength (x) >= 2, scm_s_expression, s_define); |
0f2d19dd JB |
863 | proc = SCM_CAR (x); |
864 | x = SCM_CDR (x); | |
0c95b57d | 865 | while (SCM_CONSP (proc)) |
0f2d19dd | 866 | { /* nested define syntax */ |
2f0d1375 | 867 | x = scm_cons (scm_cons2 (scm_sym_lambda, SCM_CDR (proc), x), SCM_EOL); |
0f2d19dd JB |
868 | proc = SCM_CAR (proc); |
869 | } | |
160bb34a DH |
870 | SCM_ASSYNT (SCM_SYMBOLP (proc), scm_s_variable, s_define); |
871 | SCM_ASSYNT (1 == scm_ilength (x), scm_s_expression, s_define); | |
0f2d19dd JB |
872 | if (SCM_TOP_LEVEL (env)) |
873 | { | |
874 | x = evalcar (x, env); | |
6dbd0af5 | 875 | #ifdef DEBUG_EXTENSIONS |
80ea260c MD |
876 | if (SCM_REC_PROCNAMES_P && SCM_NIMP (x)) |
877 | { | |
878 | arg1 = x; | |
879 | proc: | |
880 | if (SCM_CLOSUREP (arg1) | |
881 | /* Only the first definition determines the name. */ | |
cf498326 | 882 | && SCM_FALSEP (scm_procedure_property (arg1, scm_sym_name))) |
2f0d1375 | 883 | scm_set_procedure_property_x (arg1, scm_sym_name, proc); |
22a52da1 DH |
884 | else if (SCM_MACROP (arg1) |
885 | /* Dirk::FIXME: Does the following test make sense? */ | |
886 | && !SCM_EQ_P (SCM_MACRO_CODE (arg1), arg1)) | |
80ea260c | 887 | { |
22a52da1 | 888 | arg1 = SCM_MACRO_CODE (arg1); |
80ea260c MD |
889 | goto proc; |
890 | } | |
891 | } | |
6dbd0af5 | 892 | #endif |
86d31dfe MV |
893 | arg1 = scm_sym2var (proc, scm_env_top_level (env), SCM_BOOL_T); |
894 | SCM_VARIABLE_SET (arg1, x); | |
0f2d19dd | 895 | #ifdef SICP |
86d31dfe | 896 | return scm_cons2 (scm_sym_quote, proc, SCM_EOL); |
0f2d19dd JB |
897 | #else |
898 | return SCM_UNSPECIFIED; | |
899 | #endif | |
900 | } | |
901 | return scm_cons2 (SCM_IM_DEFINE, proc, x); | |
902 | } | |
6dbd0af5 | 903 | |
0f2d19dd JB |
904 | /* end of acros */ |
905 | ||
26d5b9b4 | 906 | static SCM |
6e8d25a6 | 907 | scm_m_letrec1 (SCM op, SCM imm, SCM xorig, SCM env) |
0f2d19dd JB |
908 | { |
909 | SCM cdrx = SCM_CDR (xorig); /* locally mutable version of form */ | |
3db4adfc | 910 | char *what = SCM_SYMBOL_CHARS (SCM_CAR (xorig)); |
0f2d19dd JB |
911 | SCM x = cdrx, proc, arg1; /* structure traversers */ |
912 | SCM vars = SCM_EOL, inits = SCM_EOL, *initloc = &inits; | |
913 | ||
0f2d19dd | 914 | proc = SCM_CAR (x); |
160bb34a | 915 | SCM_ASSYNT (scm_ilength (proc) >= 1, scm_s_bindings, what); |
0f2d19dd JB |
916 | do |
917 | { | |
918 | /* vars scm_list reversed here, inits reversed at evaluation */ | |
919 | arg1 = SCM_CAR (proc); | |
160bb34a DH |
920 | SCM_ASSYNT (2 == scm_ilength (arg1), scm_s_bindings, what); |
921 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (arg1)), scm_s_variable, what); | |
185ab0ef | 922 | if (scm_c_improper_memq (SCM_CAR (arg1), vars)) |
db4b4ca6 | 923 | scm_misc_error (what, scm_s_duplicate_bindings, SCM_EOL); |
0f2d19dd JB |
924 | vars = scm_cons (SCM_CAR (arg1), vars); |
925 | *initloc = scm_cons (SCM_CAR (SCM_CDR (arg1)), SCM_EOL); | |
a23afe53 | 926 | initloc = SCM_CDRLOC (*initloc); |
0f2d19dd | 927 | } |
ff467021 | 928 | while (SCM_NIMP (proc = SCM_CDR (proc))); |
26d5b9b4 | 929 | |
3a3111a8 MD |
930 | return scm_cons2 (op, vars, |
931 | scm_cons (inits, scm_m_body (imm, SCM_CDR (x), what))); | |
0f2d19dd JB |
932 | } |
933 | ||
26d5b9b4 | 934 | SCM_SYNTAX(s_letrec, "letrec", scm_makmmacro, scm_m_letrec); |
2f0d1375 | 935 | SCM_GLOBAL_SYMBOL(scm_sym_letrec, s_letrec); |
26d5b9b4 MD |
936 | |
937 | SCM | |
6e8d25a6 | 938 | scm_m_letrec (SCM xorig, SCM env) |
26d5b9b4 MD |
939 | { |
940 | SCM x = SCM_CDR (xorig); | |
160bb34a | 941 | SCM_ASSYNT (scm_ilength (x) >= 2, scm_s_body, s_letrec); |
26d5b9b4 MD |
942 | |
943 | if (SCM_NULLP (SCM_CAR (x))) /* null binding, let* faster */ | |
3a3111a8 MD |
944 | return scm_m_letstar (scm_cons2 (SCM_CAR (xorig), SCM_EOL, |
945 | scm_m_body (SCM_IM_LETREC, | |
946 | SCM_CDR (x), | |
947 | s_letrec)), | |
26d5b9b4 MD |
948 | env); |
949 | else | |
950 | return scm_m_letrec1 (SCM_IM_LETREC, SCM_IM_LETREC, xorig, env); | |
951 | } | |
1cc91f1b | 952 | |
b8229a3b | 953 | SCM_SYNTAX(s_let, "let", scm_makmmacro, scm_m_let); |
2f0d1375 | 954 | SCM_GLOBAL_SYMBOL(scm_sym_let, s_let); |
b8229a3b | 955 | |
0f2d19dd | 956 | SCM |
6e8d25a6 | 957 | scm_m_let (SCM xorig, SCM env) |
0f2d19dd JB |
958 | { |
959 | SCM cdrx = SCM_CDR (xorig); /* locally mutable version of form */ | |
960 | SCM x = cdrx, proc, arg1, name; /* structure traversers */ | |
961 | SCM vars = SCM_EOL, inits = SCM_EOL, *varloc = &vars, *initloc = &inits; | |
962 | ||
160bb34a | 963 | SCM_ASSYNT (scm_ilength (x) >= 2, scm_s_body, s_let); |
0f2d19dd JB |
964 | proc = SCM_CAR (x); |
965 | if (SCM_NULLP (proc) | |
0c95b57d | 966 | || (SCM_CONSP (proc) |
26d5b9b4 MD |
967 | && SCM_CONSP (SCM_CAR (proc)) && SCM_NULLP (SCM_CDR (proc)))) |
968 | { | |
969 | /* null or single binding, let* is faster */ | |
3a3111a8 MD |
970 | return scm_m_letstar (scm_cons2 (SCM_CAR (xorig), proc, |
971 | scm_m_body (SCM_IM_LET, | |
972 | SCM_CDR (x), | |
973 | s_let)), | |
26d5b9b4 MD |
974 | env); |
975 | } | |
976 | ||
160bb34a | 977 | SCM_ASSYNT (SCM_NIMP (proc), scm_s_bindings, s_let); |
185ab0ef | 978 | if (SCM_CONSP (proc)) |
26d5b9b4 MD |
979 | { |
980 | /* plain let, proc is <bindings> */ | |
981 | return scm_m_letrec1 (SCM_IM_LET, SCM_IM_LET, xorig, env); | |
982 | } | |
983 | ||
0f2d19dd | 984 | if (!SCM_SYMBOLP (proc)) |
db4b4ca6 | 985 | scm_misc_error (s_let, scm_s_bindings, SCM_EOL); /* bad let */ |
0f2d19dd JB |
986 | name = proc; /* named let, build equiv letrec */ |
987 | x = SCM_CDR (x); | |
160bb34a | 988 | SCM_ASSYNT (scm_ilength (x) >= 2, scm_s_body, s_let); |
26d5b9b4 | 989 | proc = SCM_CAR (x); /* bindings list */ |
160bb34a | 990 | SCM_ASSYNT (scm_ilength (proc) >= 0, scm_s_bindings, s_let); |
ff467021 | 991 | while (SCM_NIMP (proc)) |
0f2d19dd JB |
992 | { /* vars and inits both in order */ |
993 | arg1 = SCM_CAR (proc); | |
160bb34a DH |
994 | SCM_ASSYNT (2 == scm_ilength (arg1), scm_s_bindings, s_let); |
995 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (arg1)), scm_s_variable, s_let); | |
0f2d19dd | 996 | *varloc = scm_cons (SCM_CAR (arg1), SCM_EOL); |
a23afe53 | 997 | varloc = SCM_CDRLOC (*varloc); |
0f2d19dd | 998 | *initloc = scm_cons (SCM_CAR (SCM_CDR (arg1)), SCM_EOL); |
a23afe53 | 999 | initloc = SCM_CDRLOC (*initloc); |
0f2d19dd JB |
1000 | proc = SCM_CDR (proc); |
1001 | } | |
26d5b9b4 | 1002 | |
2f0d1375 | 1003 | proc = scm_cons2 (scm_sym_lambda, vars, |
26d5b9b4 | 1004 | scm_m_body (SCM_IM_LET, SCM_CDR (x), "let")); |
2f0d1375 | 1005 | proc = scm_cons2 (scm_sym_let, scm_cons (scm_cons2 (name, proc, SCM_EOL), |
26d5b9b4 MD |
1006 | SCM_EOL), |
1007 | scm_acons (name, inits, SCM_EOL)); | |
1008 | return scm_m_letrec1 (SCM_IM_LETREC, SCM_IM_LET, proc, env); | |
0f2d19dd JB |
1009 | } |
1010 | ||
1011 | ||
81123e6d MD |
1012 | SCM_SYNTAX (s_atapply,"@apply", scm_makmmacro, scm_m_apply); |
1013 | SCM_GLOBAL_SYMBOL (scm_sym_atapply, s_atapply); | |
1014 | SCM_GLOBAL_SYMBOL (scm_sym_apply, s_atapply + 1); | |
1cc91f1b | 1015 | |
0f2d19dd | 1016 | SCM |
6e8d25a6 | 1017 | scm_m_apply (SCM xorig, SCM env) |
0f2d19dd | 1018 | { |
160bb34a | 1019 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 2, scm_s_expression, s_atapply); |
0f2d19dd JB |
1020 | return scm_cons (SCM_IM_APPLY, SCM_CDR (xorig)); |
1021 | } | |
1022 | ||
b8229a3b MS |
1023 | |
1024 | SCM_SYNTAX(s_atcall_cc,"@call-with-current-continuation", scm_makmmacro, scm_m_cont); | |
2f0d1375 | 1025 | SCM_GLOBAL_SYMBOL(scm_sym_atcall_cc,s_atcall_cc); |
0f2d19dd | 1026 | |
1cc91f1b | 1027 | |
0f2d19dd | 1028 | SCM |
6e8d25a6 | 1029 | scm_m_cont (SCM xorig, SCM env) |
0f2d19dd | 1030 | { |
6cb702da | 1031 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, |
160bb34a | 1032 | scm_s_expression, s_atcall_cc); |
3a3111a8 | 1033 | return scm_cons (SCM_IM_CONT, SCM_CDR (xorig)); |
0f2d19dd JB |
1034 | } |
1035 | ||
73b64342 MD |
1036 | /* Multi-language support */ |
1037 | ||
86d31dfe MV |
1038 | SCM_GLOBAL_SYMBOL (scm_lisp_nil, "nil"); |
1039 | SCM_GLOBAL_SYMBOL (scm_lisp_t, "t"); | |
73b64342 MD |
1040 | |
1041 | SCM_SYNTAX (s_nil_cond, "nil-cond", scm_makmmacro, scm_m_nil_cond); | |
1042 | ||
1043 | SCM | |
1044 | scm_m_nil_cond (SCM xorig, SCM env) | |
1045 | { | |
1046 | int len = scm_ilength (SCM_CDR (xorig)); | |
160bb34a | 1047 | SCM_ASSYNT (len >= 1 && (len & 1) == 1, scm_s_expression, "nil-cond"); |
73b64342 MD |
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 | { | |
160bb34a | 1056 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, scm_s_expression, "nil-ify"); |
73b64342 MD |
1057 | return scm_cons (SCM_IM_NIL_IFY, SCM_CDR (xorig)); |
1058 | } | |
1059 | ||
1060 | SCM_SYNTAX (s_t_ify, "t-ify", scm_makmmacro, scm_m_t_ify); | |
1061 | ||
1062 | SCM | |
1063 | scm_m_t_ify (SCM xorig, SCM env) | |
1064 | { | |
160bb34a | 1065 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, scm_s_expression, "t-ify"); |
73b64342 MD |
1066 | return scm_cons (SCM_IM_T_IFY, SCM_CDR (xorig)); |
1067 | } | |
1068 | ||
1069 | SCM_SYNTAX (s_0_cond, "0-cond", scm_makmmacro, scm_m_0_cond); | |
1070 | ||
1071 | SCM | |
1072 | scm_m_0_cond (SCM xorig, SCM env) | |
1073 | { | |
1074 | int len = scm_ilength (SCM_CDR (xorig)); | |
160bb34a | 1075 | SCM_ASSYNT (len >= 1 && (len & 1) == 1, scm_s_expression, "0-cond"); |
73b64342 MD |
1076 | return scm_cons (SCM_IM_0_COND, SCM_CDR (xorig)); |
1077 | } | |
1078 | ||
1079 | SCM_SYNTAX (s_0_ify, "0-ify", scm_makmmacro, scm_m_0_ify); | |
1080 | ||
1081 | SCM | |
1082 | scm_m_0_ify (SCM xorig, SCM env) | |
1083 | { | |
160bb34a | 1084 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, scm_s_expression, "0-ify"); |
73b64342 MD |
1085 | return scm_cons (SCM_IM_0_IFY, SCM_CDR (xorig)); |
1086 | } | |
1087 | ||
1088 | SCM_SYNTAX (s_1_ify, "1-ify", scm_makmmacro, scm_m_1_ify); | |
1089 | ||
1090 | SCM | |
1091 | scm_m_1_ify (SCM xorig, SCM env) | |
1092 | { | |
160bb34a | 1093 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, scm_s_expression, "1-ify"); |
73b64342 MD |
1094 | return scm_cons (SCM_IM_1_IFY, SCM_CDR (xorig)); |
1095 | } | |
1096 | ||
1097 | SCM_SYNTAX (s_atfop, "@fop", scm_makmmacro, scm_m_atfop); | |
1098 | ||
1099 | SCM | |
1100 | scm_m_atfop (SCM xorig, SCM env) | |
1101 | { | |
86d31dfe | 1102 | SCM x = SCM_CDR (xorig), var; |
160bb34a | 1103 | SCM_ASSYNT (scm_ilength (x) >= 1, scm_s_expression, "@fop"); |
86d31dfe MV |
1104 | var = scm_symbol_fref (SCM_CAR (x)); |
1105 | SCM_ASSYNT (SCM_VARIABLEP (var), | |
73b64342 | 1106 | "Symbol's function definition is void", NULL); |
86d31dfe | 1107 | SCM_SET_CELL_WORD_0 (x, SCM_UNPACK (var) + scm_tc3_cons_gloc); |
73b64342 MD |
1108 | return x; |
1109 | } | |
1110 | ||
1111 | SCM_SYNTAX (s_atbind, "@bind", scm_makmmacro, scm_m_atbind); | |
1112 | ||
1113 | SCM | |
1114 | scm_m_atbind (SCM xorig, SCM env) | |
1115 | { | |
1116 | SCM x = SCM_CDR (xorig); | |
160bb34a | 1117 | SCM_ASSYNT (scm_ilength (x) > 1, scm_s_expression, "@bind"); |
73b64342 MD |
1118 | |
1119 | if (SCM_IMP (env)) | |
1120 | env = SCM_BOOL_F; | |
1121 | else | |
1122 | { | |
1123 | while (SCM_NIMP (SCM_CDR (env))) | |
1124 | env = SCM_CDR (env); | |
1125 | env = SCM_CAR (env); | |
1126 | if (SCM_CONSP (env)) | |
1127 | env = SCM_BOOL_F; | |
1128 | } | |
1129 | ||
1130 | x = SCM_CAR (x); | |
1131 | while (SCM_NIMP (x)) | |
1132 | { | |
86d31dfe | 1133 | SCM_SET_CELL_WORD_0 (x, SCM_UNPACK (scm_sym2var (SCM_CAR (x), env, SCM_BOOL_T)) + scm_tc3_cons_gloc); |
73b64342 MD |
1134 | x = SCM_CDR (x); |
1135 | } | |
1136 | return scm_cons (SCM_IM_BIND, SCM_CDR (xorig)); | |
1137 | } | |
73b64342 | 1138 | |
a513ead3 MV |
1139 | SCM_SYNTAX (s_at_call_with_values, "@call-with-values", scm_makmmacro, scm_m_at_call_with_values); |
1140 | SCM_GLOBAL_SYMBOL(scm_sym_at_call_with_values, s_at_call_with_values); | |
1141 | ||
1142 | SCM | |
1143 | scm_m_at_call_with_values (SCM xorig, SCM env) | |
1144 | { | |
1145 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 2, | |
1146 | scm_s_expression, s_at_call_with_values); | |
1147 | return scm_cons (SCM_IM_CALL_WITH_VALUES, SCM_CDR (xorig)); | |
1148 | } | |
1149 | ||
26d5b9b4 MD |
1150 | SCM |
1151 | scm_m_expand_body (SCM xorig, SCM env) | |
1152 | { | |
22a52da1 | 1153 | SCM x = SCM_CDR (xorig), defs = SCM_EOL; |
26d5b9b4 MD |
1154 | char *what = SCM_ISYMCHARS (SCM_CAR (xorig)) + 2; |
1155 | ||
1156 | while (SCM_NIMP (x)) | |
1157 | { | |
22a52da1 DH |
1158 | SCM form = SCM_CAR (x); |
1159 | if (!SCM_CONSP (form)) | |
26d5b9b4 MD |
1160 | break; |
1161 | if (!SCM_SYMBOLP (SCM_CAR (form))) | |
1162 | break; | |
22a52da1 | 1163 | |
3a3111a8 MD |
1164 | form = scm_macroexp (scm_cons_source (form, |
1165 | SCM_CAR (form), | |
1166 | SCM_CDR (form)), | |
1167 | env); | |
26d5b9b4 | 1168 | |
cf498326 | 1169 | if (SCM_EQ_P (SCM_IM_DEFINE, SCM_CAR (form))) |
26d5b9b4 MD |
1170 | { |
1171 | defs = scm_cons (SCM_CDR (form), defs); | |
22a52da1 | 1172 | x = SCM_CDR (x); |
26d5b9b4 | 1173 | } |
22a52da1 | 1174 | else if (!SCM_IMP (defs)) |
26d5b9b4 MD |
1175 | { |
1176 | break; | |
1177 | } | |
cf498326 | 1178 | else if (SCM_EQ_P (SCM_IM_BEGIN, SCM_CAR (form))) |
26d5b9b4 MD |
1179 | { |
1180 | x = scm_append (scm_cons2 (SCM_CDR (form), SCM_CDR (x), SCM_EOL)); | |
1181 | } | |
1182 | else | |
1183 | { | |
22a52da1 | 1184 | x = scm_cons (form, SCM_CDR (x)); |
26d5b9b4 MD |
1185 | break; |
1186 | } | |
1187 | } | |
1188 | ||
160bb34a | 1189 | SCM_ASSYNT (SCM_NIMP (x), scm_s_body, what); |
26d5b9b4 MD |
1190 | if (SCM_NIMP (defs)) |
1191 | { | |
1192 | x = scm_cons (scm_m_letrec1 (SCM_IM_LETREC, | |
1193 | SCM_IM_DEFINE, | |
2f0d1375 | 1194 | scm_cons2 (scm_sym_define, defs, x), |
26d5b9b4 MD |
1195 | env), |
1196 | SCM_EOL); | |
1197 | } | |
1198 | ||
1199 | SCM_DEFER_INTS; | |
1200 | SCM_SETCAR (xorig, SCM_CAR (x)); | |
1201 | SCM_SETCDR (xorig, SCM_CDR (x)); | |
1202 | SCM_ALLOW_INTS; | |
1203 | ||
1204 | return xorig; | |
1205 | } | |
1206 | ||
1207 | SCM | |
1208 | scm_macroexp (SCM x, SCM env) | |
1209 | { | |
86d31dfe | 1210 | SCM res, proc, orig_sym; |
26d5b9b4 MD |
1211 | |
1212 | /* Don't bother to produce error messages here. We get them when we | |
1213 | eventually execute the code for real. */ | |
1214 | ||
1215 | macro_tail: | |
86d31dfe MV |
1216 | orig_sym = SCM_CAR (x); |
1217 | if (!SCM_SYMBOLP (orig_sym)) | |
26d5b9b4 MD |
1218 | return x; |
1219 | ||
1220 | #ifdef USE_THREADS | |
1221 | { | |
1222 | SCM *proc_ptr = scm_lookupcar1 (x, env, 0); | |
1223 | if (proc_ptr == NULL) | |
1224 | { | |
1225 | /* We have lost the race. */ | |
1226 | goto macro_tail; | |
1227 | } | |
1228 | proc = *proc_ptr; | |
1229 | } | |
1230 | #else | |
1231 | proc = *scm_lookupcar (x, env, 0); | |
1232 | #endif | |
1233 | ||
1234 | /* Only handle memoizing macros. `Acros' and `macros' are really | |
1235 | special forms and should not be evaluated here. */ | |
1236 | ||
22a52da1 | 1237 | if (!SCM_MACROP (proc) || SCM_MACRO_TYPE (proc) != 2) |
26d5b9b4 MD |
1238 | return x; |
1239 | ||
86d31dfe | 1240 | SCM_SETCAR (x, orig_sym); /* Undo memoizing effect of lookupcar */ |
22a52da1 | 1241 | res = scm_apply (SCM_MACRO_CODE (proc), x, scm_cons (env, scm_listofnull)); |
26d5b9b4 MD |
1242 | |
1243 | if (scm_ilength (res) <= 0) | |
1244 | res = scm_cons2 (SCM_IM_BEGIN, res, SCM_EOL); | |
1245 | ||
26d5b9b4 MD |
1246 | SCM_DEFER_INTS; |
1247 | SCM_SETCAR (x, SCM_CAR (res)); | |
1248 | SCM_SETCDR (x, SCM_CDR (res)); | |
1249 | SCM_ALLOW_INTS; | |
1250 | ||
1251 | goto macro_tail; | |
1252 | } | |
73b64342 | 1253 | |
6dbd0af5 MD |
1254 | /* scm_unmemocopy takes a memoized expression together with its |
1255 | * environment and rewrites it to its original form. Thus, it is the | |
1256 | * inversion of the rewrite rules above. The procedure is not | |
1257 | * optimized for speed. It's used in scm_iprin1 when printing the | |
220ff1eb MD |
1258 | * code of a closure, in scm_procedure_source, in display_frame when |
1259 | * generating the source for a stackframe in a backtrace, and in | |
1260 | * display_expression. | |
86d31dfe MV |
1261 | * |
1262 | * Unmemoizing is not a realiable process. You can not in general | |
1263 | * expect to get the original source back. | |
1264 | * | |
1265 | * However, GOOPS currently relies on this for method compilation. | |
1266 | * This ought to change. | |
26d5b9b4 MD |
1267 | */ |
1268 | ||
f1267706 | 1269 | #define SCM_BIT8(x) (127 & SCM_UNPACK (x)) |
c209c88e | 1270 | |
6dbd0af5 | 1271 | static SCM |
1bbd0b84 | 1272 | unmemocopy (SCM x, SCM env) |
6dbd0af5 MD |
1273 | { |
1274 | SCM ls, z; | |
1275 | #ifdef DEBUG_EXTENSIONS | |
1276 | SCM p; | |
1277 | #endif | |
1278 | if (SCM_NCELLP (x) || SCM_NECONSP (x)) | |
1279 | return x; | |
1280 | #ifdef DEBUG_EXTENSIONS | |
1281 | p = scm_whash_lookup (scm_source_whash, x); | |
1282 | #endif | |
1283 | switch (SCM_TYP7 (x)) | |
1284 | { | |
c209c88e | 1285 | case SCM_BIT8(SCM_IM_AND): |
2f0d1375 | 1286 | ls = z = scm_cons (scm_sym_and, SCM_UNSPECIFIED); |
6dbd0af5 | 1287 | break; |
c209c88e | 1288 | case SCM_BIT8(SCM_IM_BEGIN): |
2f0d1375 | 1289 | ls = z = scm_cons (scm_sym_begin, SCM_UNSPECIFIED); |
6dbd0af5 | 1290 | break; |
c209c88e | 1291 | case SCM_BIT8(SCM_IM_CASE): |
2f0d1375 | 1292 | ls = z = scm_cons (scm_sym_case, SCM_UNSPECIFIED); |
6dbd0af5 | 1293 | break; |
c209c88e | 1294 | case SCM_BIT8(SCM_IM_COND): |
2f0d1375 | 1295 | ls = z = scm_cons (scm_sym_cond, SCM_UNSPECIFIED); |
6dbd0af5 | 1296 | break; |
c209c88e | 1297 | case SCM_BIT8(SCM_IM_DO): |
2f0d1375 | 1298 | ls = scm_cons (scm_sym_do, SCM_UNSPECIFIED); |
6dbd0af5 | 1299 | goto transform; |
c209c88e | 1300 | case SCM_BIT8(SCM_IM_IF): |
2f0d1375 | 1301 | ls = z = scm_cons (scm_sym_if, SCM_UNSPECIFIED); |
6dbd0af5 | 1302 | break; |
c209c88e | 1303 | case SCM_BIT8(SCM_IM_LET): |
2f0d1375 | 1304 | ls = scm_cons (scm_sym_let, SCM_UNSPECIFIED); |
6dbd0af5 | 1305 | goto transform; |
c209c88e | 1306 | case SCM_BIT8(SCM_IM_LETREC): |
6dbd0af5 MD |
1307 | { |
1308 | SCM f, v, e, s; | |
2f0d1375 | 1309 | ls = scm_cons (scm_sym_letrec, SCM_UNSPECIFIED); |
6dbd0af5 MD |
1310 | transform: |
1311 | x = SCM_CDR (x); | |
26d5b9b4 | 1312 | /* binding names */ |
6dbd0af5 MD |
1313 | f = v = SCM_CAR (x); |
1314 | x = SCM_CDR (x); | |
e2806c10 | 1315 | z = EXTEND_ENV (f, SCM_EOL, env); |
26d5b9b4 | 1316 | /* inits */ |
6dbd0af5 | 1317 | e = scm_reverse (unmemocopy (SCM_CAR (x), |
cf498326 | 1318 | SCM_EQ_P (SCM_CAR (ls), scm_sym_letrec) ? z : env)); |
6dbd0af5 | 1319 | env = z; |
26d5b9b4 | 1320 | /* increments */ |
cf498326 | 1321 | s = SCM_EQ_P (SCM_CAR (ls), scm_sym_do) |
6dbd0af5 MD |
1322 | ? scm_reverse (unmemocopy (SCM_CDR (SCM_CDR (SCM_CDR (x))), env)) |
1323 | : f; | |
26d5b9b4 | 1324 | /* build transformed binding list */ |
6dbd0af5 | 1325 | z = SCM_EOL; |
1bd07992 | 1326 | while (SCM_NIMP (v)) |
6dbd0af5 MD |
1327 | { |
1328 | z = scm_acons (SCM_CAR (v), | |
1329 | scm_cons (SCM_CAR (e), | |
cf498326 | 1330 | SCM_EQ_P (SCM_CAR (s), SCM_CAR (v)) |
6dbd0af5 MD |
1331 | ? SCM_EOL |
1332 | : scm_cons (SCM_CAR (s), SCM_EOL)), | |
1333 | z); | |
1334 | v = SCM_CDR (v); | |
1335 | e = SCM_CDR (e); | |
1336 | s = SCM_CDR (s); | |
1337 | } | |
a23afe53 MD |
1338 | z = scm_cons (z, SCM_UNSPECIFIED); |
1339 | SCM_SETCDR (ls, z); | |
cf498326 | 1340 | if (SCM_EQ_P (SCM_CAR (ls), scm_sym_do)) |
6dbd0af5 MD |
1341 | { |
1342 | x = SCM_CDR (x); | |
26d5b9b4 | 1343 | /* test clause */ |
a23afe53 | 1344 | SCM_SETCDR (z, scm_cons (unmemocopy (SCM_CAR (x), env), |
6dbd0af5 | 1345 | SCM_UNSPECIFIED)); |
a23afe53 MD |
1346 | z = SCM_CDR (z); |
1347 | x = (SCM) (SCM_CARLOC (SCM_CDR (x)) - 1); | |
26d5b9b4 MD |
1348 | /* body forms are now to be found in SCM_CDR (x) |
1349 | (this is how *real* code look like! :) */ | |
6dbd0af5 MD |
1350 | } |
1351 | break; | |
1352 | } | |
c209c88e | 1353 | case SCM_BIT8(SCM_IM_LETSTAR): |
6dbd0af5 MD |
1354 | { |
1355 | SCM b, y; | |
1356 | x = SCM_CDR (x); | |
1357 | b = SCM_CAR (x); | |
1358 | y = SCM_EOL; | |
1359 | if SCM_IMP (b) | |
1360 | { | |
e2806c10 | 1361 | env = EXTEND_ENV (SCM_EOL, SCM_EOL, env); |
6dbd0af5 MD |
1362 | goto letstar; |
1363 | } | |
1364 | y = z = scm_acons (SCM_CAR (b), | |
1365 | unmemocar ( | |
1366 | scm_cons (unmemocopy (SCM_CAR (SCM_CDR (b)), env), SCM_EOL), env), | |
1367 | SCM_UNSPECIFIED); | |
e2806c10 | 1368 | env = EXTEND_ENV (SCM_CAR (b), SCM_BOOL_F, env); |
6dbd0af5 MD |
1369 | b = SCM_CDR (SCM_CDR (b)); |
1370 | if (SCM_IMP (b)) | |
1371 | { | |
1372 | SCM_SETCDR (y, SCM_EOL); | |
2f0d1375 | 1373 | ls = scm_cons (scm_sym_let, z = scm_cons (y, SCM_UNSPECIFIED)); |
6dbd0af5 MD |
1374 | break; |
1375 | } | |
1376 | do | |
1377 | { | |
a23afe53 MD |
1378 | SCM_SETCDR (z, scm_acons (SCM_CAR (b), |
1379 | unmemocar ( | |
6dbd0af5 | 1380 | scm_cons (unmemocopy (SCM_CAR (SCM_CDR (b)), env), SCM_EOL), env), |
a23afe53 MD |
1381 | SCM_UNSPECIFIED)); |
1382 | z = SCM_CDR (z); | |
e2806c10 | 1383 | env = EXTEND_ENV (SCM_CAR (b), SCM_BOOL_F, env); |
6dbd0af5 MD |
1384 | b = SCM_CDR (SCM_CDR (b)); |
1385 | } | |
ff467021 | 1386 | while (SCM_NIMP (b)); |
a23afe53 | 1387 | SCM_SETCDR (z, SCM_EOL); |
6dbd0af5 | 1388 | letstar: |
2f0d1375 | 1389 | ls = scm_cons (scm_sym_letstar, z = scm_cons (y, SCM_UNSPECIFIED)); |
6dbd0af5 MD |
1390 | break; |
1391 | } | |
c209c88e | 1392 | case SCM_BIT8(SCM_IM_OR): |
2f0d1375 | 1393 | ls = z = scm_cons (scm_sym_or, SCM_UNSPECIFIED); |
6dbd0af5 | 1394 | break; |
c209c88e | 1395 | case SCM_BIT8(SCM_IM_LAMBDA): |
6dbd0af5 | 1396 | x = SCM_CDR (x); |
2f0d1375 | 1397 | ls = scm_cons (scm_sym_lambda, |
6dbd0af5 | 1398 | z = scm_cons (SCM_CAR (x), SCM_UNSPECIFIED)); |
e2806c10 | 1399 | env = EXTEND_ENV (SCM_CAR (x), SCM_EOL, env); |
6dbd0af5 | 1400 | break; |
c209c88e | 1401 | case SCM_BIT8(SCM_IM_QUOTE): |
2f0d1375 | 1402 | ls = z = scm_cons (scm_sym_quote, SCM_UNSPECIFIED); |
6dbd0af5 | 1403 | break; |
c209c88e | 1404 | case SCM_BIT8(SCM_IM_SET_X): |
89efbff4 | 1405 | ls = z = scm_cons (scm_sym_set_x, SCM_UNSPECIFIED); |
6dbd0af5 | 1406 | break; |
c209c88e | 1407 | case SCM_BIT8(SCM_IM_DEFINE): |
6dbd0af5 MD |
1408 | { |
1409 | SCM n; | |
1410 | x = SCM_CDR (x); | |
2f0d1375 | 1411 | ls = scm_cons (scm_sym_define, |
6dbd0af5 MD |
1412 | z = scm_cons (n = SCM_CAR (x), SCM_UNSPECIFIED)); |
1413 | if (SCM_NNULLP (env)) | |
a23afe53 | 1414 | SCM_SETCAR (SCM_CAR (env), scm_cons (n, SCM_CAR (SCM_CAR (env)))); |
6dbd0af5 MD |
1415 | break; |
1416 | } | |
c209c88e | 1417 | case SCM_BIT8(SCM_MAKISYM (0)): |
6dbd0af5 MD |
1418 | z = SCM_CAR (x); |
1419 | if (!SCM_ISYMP (z)) | |
1420 | goto unmemo; | |
ff467021 | 1421 | switch (SCM_ISYMNUM (z)) |
6dbd0af5 MD |
1422 | { |
1423 | case (SCM_ISYMNUM (SCM_IM_APPLY)): | |
2f0d1375 | 1424 | ls = z = scm_cons (scm_sym_atapply, SCM_UNSPECIFIED); |
6dbd0af5 MD |
1425 | goto loop; |
1426 | case (SCM_ISYMNUM (SCM_IM_CONT)): | |
2f0d1375 | 1427 | ls = z = scm_cons (scm_sym_atcall_cc, SCM_UNSPECIFIED); |
6dbd0af5 | 1428 | goto loop; |
a570e93a MD |
1429 | case (SCM_ISYMNUM (SCM_IM_DELAY)): |
1430 | ls = z = scm_cons (scm_sym_delay, SCM_UNSPECIFIED); | |
1431 | x = SCM_CDR (x); | |
1432 | goto loop; | |
a513ead3 MV |
1433 | case (SCM_ISYMNUM (SCM_IM_CALL_WITH_VALUES)): |
1434 | ls = z = scm_cons (scm_sym_at_call_with_values, SCM_UNSPECIFIED); | |
1435 | goto loop; | |
6dbd0af5 | 1436 | default: |
fa888178 | 1437 | /* appease the Sun compiler god: */ ; |
6dbd0af5 MD |
1438 | } |
1439 | unmemo: | |
1440 | default: | |
1441 | ls = z = unmemocar (scm_cons (unmemocopy (SCM_CAR (x), env), | |
1442 | SCM_UNSPECIFIED), | |
1443 | env); | |
1444 | } | |
1445 | loop: | |
1446 | while (SCM_CELLP (x = SCM_CDR (x)) && SCM_ECONSP (x)) | |
a23afe53 | 1447 | { |
44d3cb0d | 1448 | if (SCM_ISYMP (SCM_CAR (x))) |
26d5b9b4 MD |
1449 | /* skip body markers */ |
1450 | continue; | |
a23afe53 MD |
1451 | SCM_SETCDR (z, unmemocar (scm_cons (unmemocopy (SCM_CAR (x), env), |
1452 | SCM_UNSPECIFIED), | |
1453 | env)); | |
1454 | z = SCM_CDR (z); | |
1455 | } | |
1456 | SCM_SETCDR (z, x); | |
6dbd0af5 MD |
1457 | #ifdef DEBUG_EXTENSIONS |
1458 | if (SCM_NFALSEP (p)) | |
1459 | scm_whash_insert (scm_source_whash, ls, p); | |
1460 | #endif | |
1461 | return ls; | |
1462 | } | |
1463 | ||
1cc91f1b | 1464 | |
6dbd0af5 | 1465 | SCM |
6e8d25a6 | 1466 | scm_unmemocopy (SCM x, SCM env) |
6dbd0af5 MD |
1467 | { |
1468 | if (SCM_NNULLP (env)) | |
1469 | /* Make a copy of the lowest frame to protect it from | |
1470 | modifications by SCM_IM_DEFINE */ | |
1471 | return unmemocopy (x, scm_cons (SCM_CAR (env), SCM_CDR (env))); | |
1472 | else | |
1473 | return unmemocopy (x, env); | |
1474 | } | |
1475 | ||
cf7c17e9 | 1476 | #ifndef SCM_RECKLESS |
1cc91f1b | 1477 | |
0f2d19dd | 1478 | int |
6e8d25a6 | 1479 | scm_badargsp (SCM formals, SCM args) |
0f2d19dd | 1480 | { |
ff467021 | 1481 | while (SCM_NIMP (formals)) |
0f2d19dd | 1482 | { |
ff467021 JB |
1483 | if (SCM_NCONSP (formals)) |
1484 | return 0; | |
1485 | if (SCM_IMP(args)) | |
1486 | return 1; | |
0f2d19dd JB |
1487 | formals = SCM_CDR (formals); |
1488 | args = SCM_CDR (args); | |
1489 | } | |
1490 | return SCM_NNULLP (args) ? 1 : 0; | |
1491 | } | |
1492 | #endif | |
1493 | ||
002f1a5d MD |
1494 | static int |
1495 | scm_badformalsp (SCM closure, int n) | |
1496 | { | |
726d810a DH |
1497 | SCM formals = SCM_CLOSURE_FORMALS (closure); |
1498 | while (!SCM_NULLP (formals)) | |
002f1a5d | 1499 | { |
726d810a | 1500 | if (!SCM_CONSP (formals)) |
002f1a5d MD |
1501 | return 0; |
1502 | if (n == 0) | |
1503 | return 1; | |
1504 | --n; | |
1505 | formals = SCM_CDR (formals); | |
1506 | } | |
1507 | return n; | |
1508 | } | |
0f2d19dd JB |
1509 | |
1510 | \f | |
6dbd0af5 | 1511 | SCM |
6e8d25a6 | 1512 | scm_eval_args (SCM l, SCM env, SCM proc) |
6dbd0af5 | 1513 | { |
680ed4a8 | 1514 | SCM results = SCM_EOL, *lloc = &results, res; |
22a52da1 | 1515 | while (!SCM_IMP (l)) |
6dbd0af5 | 1516 | { |
cf7c17e9 | 1517 | #ifdef SCM_CAUTIOUS |
44d3cb0d | 1518 | if (SCM_CONSP (l)) |
680ed4a8 MD |
1519 | { |
1520 | if (SCM_IMP (SCM_CAR (l))) | |
6cb702da | 1521 | res = SCM_EVALIM (SCM_CAR (l), env); |
680ed4a8 MD |
1522 | else |
1523 | res = EVALCELLCAR (l, env); | |
1524 | } | |
3201d763 | 1525 | else if (SCM_TYP3 (l) == scm_tc3_cons_gloc) |
680ed4a8 | 1526 | { |
86d31dfe MV |
1527 | scm_bits_t vcell = |
1528 | SCM_STRUCT_VTABLE_DATA (l) [scm_vtable_index_vcell]; | |
3201d763 | 1529 | if (vcell == 0) |
680ed4a8 | 1530 | res = SCM_CAR (l); /* struct planted in code */ |
3201d763 | 1531 | else |
86d31dfe | 1532 | res = SCM_GLOC_VAL (SCM_CAR (l)); |
680ed4a8 MD |
1533 | } |
1534 | else | |
1535 | goto wrongnumargs; | |
1536 | #else | |
1537 | res = EVALCAR (l, env); | |
1538 | #endif | |
1539 | *lloc = scm_cons (res, SCM_EOL); | |
a23afe53 | 1540 | lloc = SCM_CDRLOC (*lloc); |
6dbd0af5 MD |
1541 | l = SCM_CDR (l); |
1542 | } | |
cf7c17e9 | 1543 | #ifdef SCM_CAUTIOUS |
22a52da1 | 1544 | if (!SCM_NULLP (l)) |
680ed4a8 MD |
1545 | { |
1546 | wrongnumargs: | |
1547 | scm_wrong_num_args (proc); | |
1548 | } | |
1549 | #endif | |
1550 | return results; | |
6dbd0af5 | 1551 | } |
c4ac4d88 | 1552 | |
9de33deb MD |
1553 | SCM |
1554 | scm_eval_body (SCM code, SCM env) | |
1555 | { | |
1556 | SCM next; | |
1557 | again: | |
1558 | next = code; | |
1559 | while (SCM_NNULLP (next = SCM_CDR (next))) | |
1560 | { | |
1561 | if (SCM_IMP (SCM_CAR (code))) | |
1562 | { | |
1563 | if (SCM_ISYMP (SCM_CAR (code))) | |
1564 | { | |
1565 | code = scm_m_expand_body (code, env); | |
1566 | goto again; | |
1567 | } | |
1568 | } | |
1569 | else | |
1570 | SCM_XEVAL (SCM_CAR (code), env); | |
1571 | code = next; | |
1572 | } | |
1573 | return SCM_XEVALCAR (code, env); | |
1574 | } | |
1575 | ||
c4ac4d88 | 1576 | |
0f2d19dd JB |
1577 | #endif /* !DEVAL */ |
1578 | ||
6dbd0af5 MD |
1579 | |
1580 | /* SECTION: This code is specific for the debugging support. One | |
1581 | * branch is read when DEVAL isn't defined, the other when DEVAL is | |
1582 | * defined. | |
1583 | */ | |
1584 | ||
1585 | #ifndef DEVAL | |
1586 | ||
1587 | #define SCM_APPLY scm_apply | |
1588 | #define PREP_APPLY(proc, args) | |
1589 | #define ENTER_APPLY | |
1590 | #define RETURN(x) return x; | |
b7ff98dd MD |
1591 | #ifdef STACK_CHECKING |
1592 | #ifndef NO_CEVAL_STACK_CHECKING | |
1593 | #define EVAL_STACK_CHECKING | |
1594 | #endif | |
6dbd0af5 MD |
1595 | #endif |
1596 | ||
1597 | #else /* !DEVAL */ | |
1598 | ||
0f2d19dd JB |
1599 | #undef SCM_CEVAL |
1600 | #define SCM_CEVAL scm_deval /* Substitute all uses of scm_ceval */ | |
1601 | #undef SCM_APPLY | |
1602 | #define SCM_APPLY scm_dapply | |
6dbd0af5 MD |
1603 | #undef PREP_APPLY |
1604 | #define PREP_APPLY(p, l) \ | |
1605 | { ++debug.info; debug.info->a.proc = p; debug.info->a.args = l; } | |
1606 | #undef ENTER_APPLY | |
1607 | #define ENTER_APPLY \ | |
d3a6bc94 | 1608 | do { \ |
b7ff98dd | 1609 | SCM_SET_ARGSREADY (debug);\ |
b6d75948 | 1610 | if (CHECK_APPLY && SCM_TRAPS_P)\ |
b7ff98dd | 1611 | if (SCM_APPLY_FRAME_P || (SCM_TRACE_P && PROCTRACEP (proc)))\ |
6dbd0af5 | 1612 | {\ |
156dcb09 | 1613 | SCM tmp, tail = SCM_BOOL(SCM_TRACED_FRAME_P (debug)); \ |
c6a4fbce | 1614 | SCM_SET_TRACED_FRAME (debug); \ |
b7ff98dd | 1615 | if (SCM_CHEAPTRAPS_P)\ |
6dbd0af5 | 1616 | {\ |
c0ab1b8d | 1617 | tmp = scm_make_debugobj (&debug);\ |
2f0d1375 | 1618 | scm_ithrow (scm_sym_apply_frame, scm_cons2 (tmp, tail, SCM_EOL), 0);\ |
b6d75948 | 1619 | }\ |
6dbd0af5 MD |
1620 | else\ |
1621 | {\ | |
5f144b10 GH |
1622 | int first;\ |
1623 | tmp = scm_make_continuation (&first);\ | |
1624 | if (first)\ | |
2f0d1375 | 1625 | scm_ithrow (scm_sym_apply_frame, scm_cons2 (tmp, tail, SCM_EOL), 0);\ |
6dbd0af5 MD |
1626 | }\ |
1627 | }\ | |
d3a6bc94 | 1628 | } while (0) |
0f2d19dd JB |
1629 | #undef RETURN |
1630 | #define RETURN(e) {proc = (e); goto exit;} | |
b7ff98dd MD |
1631 | #ifdef STACK_CHECKING |
1632 | #ifndef EVAL_STACK_CHECKING | |
1633 | #define EVAL_STACK_CHECKING | |
1634 | #endif | |
6dbd0af5 MD |
1635 | #endif |
1636 | ||
1637 | /* scm_ceval_ptr points to the currently selected evaluator. | |
1638 | * *fixme*: Although efficiency is important here, this state variable | |
1639 | * should probably not be a global. It should be related to the | |
1640 | * current repl. | |
1641 | */ | |
1642 | ||
1cc91f1b | 1643 | |
1bbd0b84 | 1644 | SCM (*scm_ceval_ptr) (SCM x, SCM env); |
0f2d19dd | 1645 | |
1646d37b | 1646 | /* scm_last_debug_frame contains a pointer to the last debugging |
6dbd0af5 MD |
1647 | * information stack frame. It is accessed very often from the |
1648 | * debugging evaluator, so it should probably not be indirectly | |
1649 | * addressed. Better to save and restore it from the current root at | |
1650 | * any stack swaps. | |
1651 | */ | |
1652 | ||
1646d37b MD |
1653 | #ifndef USE_THREADS |
1654 | scm_debug_frame *scm_last_debug_frame; | |
1655 | #endif | |
6dbd0af5 MD |
1656 | |
1657 | /* scm_debug_eframe_size is the number of slots available for pseudo | |
1658 | * stack frames at each real stack frame. | |
1659 | */ | |
1660 | ||
1661 | int scm_debug_eframe_size; | |
1662 | ||
b7ff98dd | 1663 | int scm_debug_mode, scm_check_entry_p, scm_check_apply_p, scm_check_exit_p; |
6dbd0af5 | 1664 | |
a74145b8 MD |
1665 | int scm_eval_stack; |
1666 | ||
33b97402 | 1667 | scm_option scm_eval_opts[] = { |
a74145b8 | 1668 | { SCM_OPTION_INTEGER, "stack", 22000, "Size of thread stacks (in machine words)." } |
33b97402 MD |
1669 | }; |
1670 | ||
6dbd0af5 | 1671 | scm_option scm_debug_opts[] = { |
b7ff98dd MD |
1672 | { SCM_OPTION_BOOLEAN, "cheap", 1, |
1673 | "*Flyweight representation of the stack at traps." }, | |
1674 | { SCM_OPTION_BOOLEAN, "breakpoints", 0, "*Check for breakpoints." }, | |
1675 | { SCM_OPTION_BOOLEAN, "trace", 0, "*Trace mode." }, | |
1676 | { SCM_OPTION_BOOLEAN, "procnames", 1, | |
1677 | "Record procedure names at definition." }, | |
1678 | { SCM_OPTION_BOOLEAN, "backwards", 0, | |
1679 | "Display backtrace in anti-chronological order." }, | |
274dc5fd | 1680 | { SCM_OPTION_INTEGER, "width", 79, "Maximal width of backtrace." }, |
4e646a03 MD |
1681 | { SCM_OPTION_INTEGER, "indent", 10, "Maximal indentation in backtrace." }, |
1682 | { SCM_OPTION_INTEGER, "frames", 3, | |
b7ff98dd | 1683 | "Maximum number of tail-recursive frames in backtrace." }, |
4e646a03 MD |
1684 | { SCM_OPTION_INTEGER, "maxdepth", 1000, |
1685 | "Maximal number of stored backtrace frames." }, | |
1686 | { SCM_OPTION_INTEGER, "depth", 20, "Maximal length of printed backtrace." }, | |
11f77bfc MD |
1687 | { SCM_OPTION_BOOLEAN, "backtrace", 0, "Show backtrace on error." }, |
1688 | { SCM_OPTION_BOOLEAN, "debug", 0, "Use the debugging evaluator." }, | |
a74145b8 | 1689 | { SCM_OPTION_INTEGER, "stack", 20000, "Stack size limit (measured in words; 0 = no check)." } |
6dbd0af5 MD |
1690 | }; |
1691 | ||
1692 | scm_option scm_evaluator_trap_table[] = { | |
b6d75948 | 1693 | { SCM_OPTION_BOOLEAN, "traps", 0, "Enable evaluator traps." }, |
b7ff98dd MD |
1694 | { SCM_OPTION_BOOLEAN, "enter-frame", 0, "Trap when eval enters new frame." }, |
1695 | { SCM_OPTION_BOOLEAN, "apply-frame", 0, "Trap when entering apply." }, | |
1696 | { SCM_OPTION_BOOLEAN, "exit-frame", 0, "Trap when exiting eval or apply." } | |
6dbd0af5 MD |
1697 | }; |
1698 | ||
a1ec6916 | 1699 | SCM_DEFINE (scm_eval_options_interface, "eval-options-interface", 0, 1, 0, |
1bbd0b84 | 1700 | (SCM setting), |
b3f26b14 MG |
1701 | "Option interface for the evaluation options. Instead of using\n" |
1702 | "this procedure directly, use the procedures @code{eval-enable},\n" | |
1703 | "@code{eval-disable}, @code{eval-set!} and @var{eval-options}.") | |
1bbd0b84 | 1704 | #define FUNC_NAME s_scm_eval_options_interface |
33b97402 MD |
1705 | { |
1706 | SCM ans; | |
1707 | SCM_DEFER_INTS; | |
1708 | ans = scm_options (setting, | |
1709 | scm_eval_opts, | |
1710 | SCM_N_EVAL_OPTIONS, | |
1bbd0b84 | 1711 | FUNC_NAME); |
a74145b8 | 1712 | scm_eval_stack = SCM_EVAL_STACK * sizeof (void *); |
33b97402 MD |
1713 | SCM_ALLOW_INTS; |
1714 | return ans; | |
1715 | } | |
1bbd0b84 | 1716 | #undef FUNC_NAME |
33b97402 | 1717 | |
a1ec6916 | 1718 | SCM_DEFINE (scm_evaluator_traps, "evaluator-traps-interface", 0, 1, 0, |
1bbd0b84 | 1719 | (SCM setting), |
b3f26b14 | 1720 | "Option interface for the evaluator trap options.") |
1bbd0b84 | 1721 | #define FUNC_NAME s_scm_evaluator_traps |
33b97402 MD |
1722 | { |
1723 | SCM ans; | |
1724 | SCM_DEFER_INTS; | |
1725 | ans = scm_options (setting, | |
1726 | scm_evaluator_trap_table, | |
1727 | SCM_N_EVALUATOR_TRAPS, | |
1bbd0b84 | 1728 | FUNC_NAME); |
33b97402 | 1729 | SCM_RESET_DEBUG_MODE; |
bfc69694 | 1730 | SCM_ALLOW_INTS; |
33b97402 MD |
1731 | return ans; |
1732 | } | |
1bbd0b84 | 1733 | #undef FUNC_NAME |
33b97402 | 1734 | |
6dbd0af5 | 1735 | SCM |
6e8d25a6 | 1736 | scm_deval_args (SCM l, SCM env, SCM proc, SCM *lloc) |
0f2d19dd | 1737 | { |
680ed4a8 | 1738 | SCM *results = lloc, res; |
22a52da1 | 1739 | while (!SCM_IMP (l)) |
0f2d19dd | 1740 | { |
cf7c17e9 | 1741 | #ifdef SCM_CAUTIOUS |
44d3cb0d | 1742 | if (SCM_CONSP (l)) |
680ed4a8 MD |
1743 | { |
1744 | if (SCM_IMP (SCM_CAR (l))) | |
6cb702da | 1745 | res = SCM_EVALIM (SCM_CAR (l), env); |
680ed4a8 MD |
1746 | else |
1747 | res = EVALCELLCAR (l, env); | |
1748 | } | |
3201d763 | 1749 | else if (SCM_TYP3 (l) == scm_tc3_cons_gloc) |
680ed4a8 | 1750 | { |
86d31dfe MV |
1751 | scm_bits_t vcell = |
1752 | SCM_STRUCT_VTABLE_DATA (l) [scm_vtable_index_vcell]; | |
3201d763 | 1753 | if (vcell == 0) |
680ed4a8 | 1754 | res = SCM_CAR (l); /* struct planted in code */ |
3201d763 | 1755 | else |
86d31dfe | 1756 | res = SCM_GLOC_VAL (SCM_CAR (l)); |
680ed4a8 MD |
1757 | } |
1758 | else | |
1759 | goto wrongnumargs; | |
1760 | #else | |
1761 | res = EVALCAR (l, env); | |
1762 | #endif | |
1763 | *lloc = scm_cons (res, SCM_EOL); | |
a23afe53 | 1764 | lloc = SCM_CDRLOC (*lloc); |
0f2d19dd JB |
1765 | l = SCM_CDR (l); |
1766 | } | |
cf7c17e9 | 1767 | #ifdef SCM_CAUTIOUS |
22a52da1 | 1768 | if (!SCM_NULLP (l)) |
680ed4a8 MD |
1769 | { |
1770 | wrongnumargs: | |
1771 | scm_wrong_num_args (proc); | |
1772 | } | |
1773 | #endif | |
1774 | return *results; | |
0f2d19dd JB |
1775 | } |
1776 | ||
6dbd0af5 MD |
1777 | #endif /* !DEVAL */ |
1778 | ||
1779 | ||
1780 | /* SECTION: Some local definitions for the evaluator. | |
1781 | */ | |
1782 | ||
d9d39d76 MV |
1783 | /* Update the toplevel environment frame ENV so that it refers to the |
1784 | current module. | |
1785 | */ | |
1786 | #define UPDATE_TOPLEVEL_ENV(env) \ | |
1787 | do { \ | |
1788 | SCM p = scm_current_module_lookup_closure (); \ | |
1789 | if (p != SCM_CAR(env)) \ | |
1790 | env = scm_top_level_env (p); \ | |
1791 | } while (0) | |
1792 | ||
6dbd0af5 | 1793 | #ifndef DEVAL |
3201d763 | 1794 | #define CHECK_EQVISH(A,B) (SCM_EQ_P ((A), (B)) || (SCM_NFALSEP (scm_eqv_p ((A), (B))))) |
6dbd0af5 MD |
1795 | #endif /* DEVAL */ |
1796 | ||
399dedcc | 1797 | #define BUILTIN_RPASUBR /* Handle rpsubrs and asubrs without calling apply */ |
6dbd0af5 MD |
1798 | |
1799 | /* SECTION: This is the evaluator. Like any real monster, it has | |
1800 | * three heads. This code is compiled twice. | |
1801 | */ | |
1802 | ||
0f2d19dd | 1803 | #if 0 |
1cc91f1b | 1804 | |
0f2d19dd | 1805 | SCM |
1bbd0b84 | 1806 | scm_ceval (SCM x, SCM env) |
0f2d19dd JB |
1807 | {} |
1808 | #endif | |
1809 | #if 0 | |
1cc91f1b | 1810 | |
0f2d19dd | 1811 | SCM |
1bbd0b84 | 1812 | scm_deval (SCM x, SCM env) |
0f2d19dd JB |
1813 | {} |
1814 | #endif | |
1815 | ||
6dbd0af5 | 1816 | SCM |
1bbd0b84 | 1817 | SCM_CEVAL (SCM x, SCM env) |
0f2d19dd JB |
1818 | { |
1819 | union | |
1820 | { | |
1821 | SCM *lloc; | |
1822 | SCM arg1; | |
f8769b1d | 1823 | } t; |
86d31dfe | 1824 | SCM proc, arg2, orig_sym; |
6dbd0af5 | 1825 | #ifdef DEVAL |
c0ab1b8d JB |
1826 | scm_debug_frame debug; |
1827 | scm_debug_info *debug_info_end; | |
1646d37b | 1828 | debug.prev = scm_last_debug_frame; |
6dbd0af5 | 1829 | debug.status = scm_debug_eframe_size; |
04b6c081 MD |
1830 | /* |
1831 | * The debug.vect contains twice as much scm_debug_info frames as the | |
1832 | * user has specified with (debug-set! frames <n>). | |
1833 | * | |
1834 | * Even frames are eval frames, odd frames are apply frames. | |
1835 | */ | |
c0ab1b8d JB |
1836 | debug.vect = (scm_debug_info *) alloca (scm_debug_eframe_size |
1837 | * sizeof (debug.vect[0])); | |
1838 | debug.info = debug.vect; | |
1839 | debug_info_end = debug.vect + scm_debug_eframe_size; | |
1840 | scm_last_debug_frame = &debug; | |
6dbd0af5 | 1841 | #endif |
b7ff98dd | 1842 | #ifdef EVAL_STACK_CHECKING |
6f13f9cb MD |
1843 | if (scm_stack_checking_enabled_p |
1844 | && SCM_STACK_OVERFLOW_P ((SCM_STACKITEM *) &proc)) | |
6dbd0af5 | 1845 | { |
b7ff98dd | 1846 | #ifdef DEVAL |
6dbd0af5 MD |
1847 | debug.info->e.exp = x; |
1848 | debug.info->e.env = env; | |
b7ff98dd | 1849 | #endif |
6dbd0af5 MD |
1850 | scm_report_stack_overflow (); |
1851 | } | |
1852 | #endif | |
1853 | #ifdef DEVAL | |
1854 | goto start; | |
1855 | #endif | |
1856 | loopnoap: | |
1857 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
1858 | loop: | |
1859 | #ifdef DEVAL | |
b7ff98dd MD |
1860 | SCM_CLEAR_ARGSREADY (debug); |
1861 | if (SCM_OVERFLOWP (debug)) | |
6dbd0af5 | 1862 | --debug.info; |
04b6c081 MD |
1863 | /* |
1864 | * In theory, this should be the only place where it is necessary to | |
1865 | * check for space in debug.vect since both eval frames and | |
1866 | * available space are even. | |
1867 | * | |
1868 | * For this to be the case, however, it is necessary that primitive | |
1869 | * special forms which jump back to `loop', `begin' or some similar | |
1870 | * label call PREP_APPLY. A convenient way to do this is to jump to | |
1871 | * `loopnoap' or `cdrxnoap'. | |
1872 | */ | |
c0ab1b8d | 1873 | else if (++debug.info >= debug_info_end) |
6dbd0af5 | 1874 | { |
b7ff98dd | 1875 | SCM_SET_OVERFLOW (debug); |
6dbd0af5 MD |
1876 | debug.info -= 2; |
1877 | } | |
1878 | start: | |
1879 | debug.info->e.exp = x; | |
1880 | debug.info->e.env = env; | |
b6d75948 | 1881 | if (CHECK_ENTRY && SCM_TRAPS_P) |
b7ff98dd | 1882 | if (SCM_ENTER_FRAME_P || (SCM_BREAKPOINTS_P && SRCBRKP (x))) |
6dbd0af5 | 1883 | { |
156dcb09 | 1884 | SCM tail = SCM_BOOL(SCM_TAILRECP (debug)); |
b7ff98dd | 1885 | SCM_SET_TAILREC (debug); |
b7ff98dd | 1886 | if (SCM_CHEAPTRAPS_P) |
c0ab1b8d | 1887 | t.arg1 = scm_make_debugobj (&debug); |
6dbd0af5 MD |
1888 | else |
1889 | { | |
5f144b10 GH |
1890 | int first; |
1891 | SCM val = scm_make_continuation (&first); | |
1892 | ||
1893 | if (first) | |
1894 | t.arg1 = val; | |
1895 | else | |
6dbd0af5 | 1896 | { |
5f144b10 | 1897 | x = val; |
6dbd0af5 MD |
1898 | if (SCM_IMP (x)) |
1899 | { | |
1900 | RETURN (x); | |
1901 | } | |
1902 | else | |
1903 | /* This gives the possibility for the debugger to | |
1904 | modify the source expression before evaluation. */ | |
1905 | goto dispatch; | |
1906 | } | |
1907 | } | |
2f0d1375 | 1908 | scm_ithrow (scm_sym_enter_frame, |
6dbd0af5 MD |
1909 | scm_cons2 (t.arg1, tail, |
1910 | scm_cons (scm_unmemocopy (x, env), SCM_EOL)), | |
1911 | 0); | |
1912 | } | |
6dbd0af5 | 1913 | #endif |
e3173f93 | 1914 | #if defined (USE_THREADS) || defined (DEVAL) |
f8769b1d | 1915 | dispatch: |
e3173f93 | 1916 | #endif |
9cb5124f | 1917 | SCM_TICK; |
0f2d19dd JB |
1918 | switch (SCM_TYP7 (x)) |
1919 | { | |
28b06554 | 1920 | case scm_tc7_symbol: |
0f2d19dd JB |
1921 | /* Only happens when called at top level. |
1922 | */ | |
1923 | x = scm_cons (x, SCM_UNDEFINED); | |
1924 | goto retval; | |
1925 | ||
c209c88e | 1926 | case SCM_BIT8(SCM_IM_AND): |
0f2d19dd JB |
1927 | x = SCM_CDR (x); |
1928 | t.arg1 = x; | |
1929 | while (SCM_NNULLP (t.arg1 = SCM_CDR (t.arg1))) | |
1930 | if (SCM_FALSEP (EVALCAR (x, env))) | |
1931 | { | |
1932 | RETURN (SCM_BOOL_F); | |
1933 | } | |
1934 | else | |
1935 | x = t.arg1; | |
6dbd0af5 | 1936 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
1937 | goto carloop; |
1938 | ||
c209c88e | 1939 | case SCM_BIT8(SCM_IM_BEGIN): |
d9d39d76 MV |
1940 | /* (currently unused) |
1941 | cdrxnoap: */ | |
6dbd0af5 | 1942 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
d9d39d76 MV |
1943 | /* (currently unused) |
1944 | cdrxbegin: */ | |
0f2d19dd JB |
1945 | x = SCM_CDR (x); |
1946 | ||
1947 | begin: | |
4163eb72 MV |
1948 | /* If we are on toplevel with a lookup closure, we need to sync |
1949 | with the current module. */ | |
22a52da1 | 1950 | if (SCM_CONSP (env) && !SCM_CONSP (SCM_CAR (env))) |
4163eb72 MV |
1951 | { |
1952 | t.arg1 = x; | |
d9d39d76 | 1953 | UPDATE_TOPLEVEL_ENV (env); |
22a52da1 | 1954 | while (!SCM_NULLP (t.arg1 = SCM_CDR (t.arg1))) |
4163eb72 | 1955 | { |
5280aaca | 1956 | EVALCAR (x, env); |
4163eb72 | 1957 | x = t.arg1; |
d9d39d76 | 1958 | UPDATE_TOPLEVEL_ENV (env); |
4163eb72 | 1959 | } |
5280aaca | 1960 | goto carloop; |
4163eb72 MV |
1961 | } |
1962 | else | |
5280aaca MV |
1963 | goto nontoplevel_begin; |
1964 | ||
1965 | nontoplevel_cdrxnoap: | |
1966 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
1967 | nontoplevel_cdrxbegin: | |
1968 | x = SCM_CDR (x); | |
1969 | nontoplevel_begin: | |
1970 | t.arg1 = x; | |
22a52da1 | 1971 | while (!SCM_NULLP (t.arg1 = SCM_CDR (t.arg1))) |
0f2d19dd | 1972 | { |
5280aaca | 1973 | if (SCM_IMP (SCM_CAR (x))) |
26d5b9b4 | 1974 | { |
5280aaca | 1975 | if (SCM_ISYMP (SCM_CAR (x))) |
26d5b9b4 | 1976 | { |
5280aaca MV |
1977 | x = scm_m_expand_body (x, env); |
1978 | goto nontoplevel_begin; | |
26d5b9b4 | 1979 | } |
4163eb72 | 1980 | else |
22a52da1 | 1981 | SCM_EVALIM2 (SCM_CAR (x)); |
26d5b9b4 | 1982 | } |
5280aaca MV |
1983 | else |
1984 | SCM_CEVAL (SCM_CAR (x), env); | |
1985 | x = t.arg1; | |
0f2d19dd | 1986 | } |
5280aaca | 1987 | |
0f2d19dd | 1988 | carloop: /* scm_eval car of last form in list */ |
22a52da1 | 1989 | if (!SCM_CELLP (SCM_CAR (x))) |
0f2d19dd JB |
1990 | { |
1991 | x = SCM_CAR (x); | |
6cb702da | 1992 | RETURN (SCM_IMP (x) ? SCM_EVALIM (x, env) : SCM_GLOC_VAL (x)) |
0f2d19dd JB |
1993 | } |
1994 | ||
1995 | if (SCM_SYMBOLP (SCM_CAR (x))) | |
1996 | { | |
1997 | retval: | |
26d5b9b4 | 1998 | RETURN (*scm_lookupcar (x, env, 1)) |
0f2d19dd JB |
1999 | } |
2000 | ||
2001 | x = SCM_CAR (x); | |
2002 | goto loop; /* tail recurse */ | |
2003 | ||
2004 | ||
c209c88e | 2005 | case SCM_BIT8(SCM_IM_CASE): |
0f2d19dd JB |
2006 | x = SCM_CDR (x); |
2007 | t.arg1 = EVALCAR (x, env); | |
2008 | while (SCM_NIMP (x = SCM_CDR (x))) | |
2009 | { | |
2010 | proc = SCM_CAR (x); | |
cf498326 | 2011 | if (SCM_EQ_P (scm_sym_else, SCM_CAR (proc))) |
0f2d19dd JB |
2012 | { |
2013 | x = SCM_CDR (proc); | |
6dbd0af5 | 2014 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
2015 | goto begin; |
2016 | } | |
2017 | proc = SCM_CAR (proc); | |
2018 | while (SCM_NIMP (proc)) | |
2019 | { | |
2020 | if (CHECK_EQVISH (SCM_CAR (proc), t.arg1)) | |
2021 | { | |
2022 | x = SCM_CDR (SCM_CAR (x)); | |
6dbd0af5 | 2023 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
2024 | goto begin; |
2025 | } | |
2026 | proc = SCM_CDR (proc); | |
2027 | } | |
2028 | } | |
6dbd0af5 | 2029 | RETURN (SCM_UNSPECIFIED) |
0f2d19dd JB |
2030 | |
2031 | ||
c209c88e | 2032 | case SCM_BIT8(SCM_IM_COND): |
22a52da1 | 2033 | while (!SCM_IMP (x = SCM_CDR (x))) |
0f2d19dd JB |
2034 | { |
2035 | proc = SCM_CAR (x); | |
2036 | t.arg1 = EVALCAR (proc, env); | |
2037 | if (SCM_NFALSEP (t.arg1)) | |
2038 | { | |
2039 | x = SCM_CDR (proc); | |
22a52da1 | 2040 | if (SCM_NULLP (x)) |
0f2d19dd | 2041 | { |
6dbd0af5 | 2042 | RETURN (t.arg1) |
0f2d19dd | 2043 | } |
22a52da1 | 2044 | if (!SCM_EQ_P (scm_sym_arrow, SCM_CAR (x))) |
6dbd0af5 MD |
2045 | { |
2046 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2047 | goto begin; | |
2048 | } | |
0f2d19dd JB |
2049 | proc = SCM_CDR (x); |
2050 | proc = EVALCAR (proc, env); | |
2051 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
6dbd0af5 MD |
2052 | PREP_APPLY (proc, scm_cons (t.arg1, SCM_EOL)); |
2053 | ENTER_APPLY; | |
a820af98 | 2054 | if (SCM_CLOSUREP(proc) && scm_badformalsp (proc, 1)) |
e37a4fba | 2055 | goto umwrongnumargs; |
0f2d19dd JB |
2056 | goto evap1; |
2057 | } | |
2058 | } | |
6dbd0af5 | 2059 | RETURN (SCM_UNSPECIFIED) |
0f2d19dd JB |
2060 | |
2061 | ||
c209c88e | 2062 | case SCM_BIT8(SCM_IM_DO): |
0f2d19dd JB |
2063 | x = SCM_CDR (x); |
2064 | proc = SCM_CAR (SCM_CDR (x)); /* inits */ | |
2065 | t.arg1 = SCM_EOL; /* values */ | |
2066 | while (SCM_NIMP (proc)) | |
2067 | { | |
2068 | t.arg1 = scm_cons (EVALCAR (proc, env), t.arg1); | |
2069 | proc = SCM_CDR (proc); | |
2070 | } | |
e2806c10 | 2071 | env = EXTEND_ENV (SCM_CAR (x), t.arg1, env); |
0f2d19dd JB |
2072 | x = SCM_CDR (SCM_CDR (x)); |
2073 | while (proc = SCM_CAR (x), SCM_FALSEP (EVALCAR (proc, env))) | |
2074 | { | |
f3d2630a | 2075 | for (proc = SCM_CADR (x); SCM_NIMP (proc); proc = SCM_CDR (proc)) |
0f2d19dd JB |
2076 | { |
2077 | t.arg1 = SCM_CAR (proc); /* body */ | |
2078 | SIDEVAL (t.arg1, env); | |
2079 | } | |
f3d2630a MD |
2080 | for (t.arg1 = SCM_EOL, proc = SCM_CDDR (x); |
2081 | SCM_NIMP (proc); | |
2082 | proc = SCM_CDR (proc)) | |
0f2d19dd | 2083 | t.arg1 = scm_cons (EVALCAR (proc, env), t.arg1); /* steps */ |
e2806c10 | 2084 | env = EXTEND_ENV (SCM_CAR (SCM_CAR (env)), t.arg1, SCM_CDR (env)); |
0f2d19dd JB |
2085 | } |
2086 | x = SCM_CDR (proc); | |
2087 | if (SCM_NULLP (x)) | |
6dbd0af5 MD |
2088 | RETURN (SCM_UNSPECIFIED); |
2089 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
5280aaca | 2090 | goto nontoplevel_begin; |
0f2d19dd JB |
2091 | |
2092 | ||
c209c88e | 2093 | case SCM_BIT8(SCM_IM_IF): |
0f2d19dd JB |
2094 | x = SCM_CDR (x); |
2095 | if (SCM_NFALSEP (EVALCAR (x, env))) | |
2096 | x = SCM_CDR (x); | |
2097 | else if (SCM_IMP (x = SCM_CDR (SCM_CDR (x)))) | |
2098 | { | |
2099 | RETURN (SCM_UNSPECIFIED); | |
2100 | } | |
6dbd0af5 | 2101 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
2102 | goto carloop; |
2103 | ||
2104 | ||
c209c88e | 2105 | case SCM_BIT8(SCM_IM_LET): |
0f2d19dd JB |
2106 | x = SCM_CDR (x); |
2107 | proc = SCM_CAR (SCM_CDR (x)); | |
2108 | t.arg1 = SCM_EOL; | |
2109 | do | |
2110 | { | |
2111 | t.arg1 = scm_cons (EVALCAR (proc, env), t.arg1); | |
2112 | } | |
2113 | while (SCM_NIMP (proc = SCM_CDR (proc))); | |
e2806c10 | 2114 | env = EXTEND_ENV (SCM_CAR (x), t.arg1, env); |
0f2d19dd | 2115 | x = SCM_CDR (x); |
5280aaca | 2116 | goto nontoplevel_cdrxnoap; |
0f2d19dd JB |
2117 | |
2118 | ||
c209c88e | 2119 | case SCM_BIT8(SCM_IM_LETREC): |
0f2d19dd | 2120 | x = SCM_CDR (x); |
e2806c10 | 2121 | env = EXTEND_ENV (SCM_CAR (x), scm_undefineds, env); |
0f2d19dd JB |
2122 | x = SCM_CDR (x); |
2123 | proc = SCM_CAR (x); | |
2124 | t.arg1 = SCM_EOL; | |
2125 | do | |
2126 | { | |
2127 | t.arg1 = scm_cons (EVALCAR (proc, env), t.arg1); | |
2128 | } | |
2129 | while (SCM_NIMP (proc = SCM_CDR (proc))); | |
a23afe53 | 2130 | SCM_SETCDR (SCM_CAR (env), t.arg1); |
5280aaca | 2131 | goto nontoplevel_cdrxnoap; |
0f2d19dd JB |
2132 | |
2133 | ||
c209c88e | 2134 | case SCM_BIT8(SCM_IM_LETSTAR): |
0f2d19dd JB |
2135 | x = SCM_CDR (x); |
2136 | proc = SCM_CAR (x); | |
2137 | if (SCM_IMP (proc)) | |
2138 | { | |
e2806c10 | 2139 | env = EXTEND_ENV (SCM_EOL, SCM_EOL, env); |
5280aaca | 2140 | goto nontoplevel_cdrxnoap; |
0f2d19dd JB |
2141 | } |
2142 | do | |
2143 | { | |
2144 | t.arg1 = SCM_CAR (proc); | |
2145 | proc = SCM_CDR (proc); | |
e2806c10 | 2146 | env = EXTEND_ENV (t.arg1, EVALCAR (proc, env), env); |
0f2d19dd JB |
2147 | } |
2148 | while (SCM_NIMP (proc = SCM_CDR (proc))); | |
5280aaca | 2149 | goto nontoplevel_cdrxnoap; |
0f2d19dd | 2150 | |
c209c88e | 2151 | case SCM_BIT8(SCM_IM_OR): |
0f2d19dd JB |
2152 | x = SCM_CDR (x); |
2153 | t.arg1 = x; | |
22a52da1 | 2154 | while (!SCM_NULLP (t.arg1 = SCM_CDR (t.arg1))) |
0f2d19dd JB |
2155 | { |
2156 | x = EVALCAR (x, env); | |
22a52da1 | 2157 | if (!SCM_FALSEP (x)) |
0f2d19dd JB |
2158 | { |
2159 | RETURN (x); | |
2160 | } | |
2161 | x = t.arg1; | |
2162 | } | |
6dbd0af5 | 2163 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
2164 | goto carloop; |
2165 | ||
2166 | ||
c209c88e | 2167 | case SCM_BIT8(SCM_IM_LAMBDA): |
0f2d19dd JB |
2168 | RETURN (scm_closure (SCM_CDR (x), env)); |
2169 | ||
2170 | ||
c209c88e | 2171 | case SCM_BIT8(SCM_IM_QUOTE): |
0f2d19dd JB |
2172 | RETURN (SCM_CAR (SCM_CDR (x))); |
2173 | ||
2174 | ||
c209c88e | 2175 | case SCM_BIT8(SCM_IM_SET_X): |
0f2d19dd JB |
2176 | x = SCM_CDR (x); |
2177 | proc = SCM_CAR (x); | |
3201d763 | 2178 | switch (SCM_ITAG3 (proc)) |
0f2d19dd | 2179 | { |
3201d763 | 2180 | case scm_tc3_cons: |
26d5b9b4 | 2181 | t.lloc = scm_lookupcar (x, env, 1); |
0f2d19dd | 2182 | break; |
3201d763 | 2183 | case scm_tc3_cons_gloc: |
a23afe53 | 2184 | t.lloc = SCM_GLOC_VAL_LOC (proc); |
0f2d19dd JB |
2185 | break; |
2186 | #ifdef MEMOIZE_LOCALS | |
3201d763 | 2187 | case scm_tc3_imm24: |
0f2d19dd JB |
2188 | t.lloc = scm_ilookup (proc, env); |
2189 | break; | |
2190 | #endif | |
2191 | } | |
2192 | x = SCM_CDR (x); | |
2193 | *t.lloc = EVALCAR (x, env); | |
0f2d19dd JB |
2194 | #ifdef SICP |
2195 | RETURN (*t.lloc); | |
2196 | #else | |
2197 | RETURN (SCM_UNSPECIFIED); | |
2198 | #endif | |
2199 | ||
2200 | ||
c209c88e | 2201 | case SCM_BIT8(SCM_IM_DEFINE): /* only for internal defines */ |
26d5b9b4 MD |
2202 | scm_misc_error (NULL, "Bad define placement", SCM_EOL); |
2203 | ||
0f2d19dd | 2204 | /* new syntactic forms go here. */ |
c209c88e | 2205 | case SCM_BIT8(SCM_MAKISYM (0)): |
0f2d19dd JB |
2206 | proc = SCM_CAR (x); |
2207 | SCM_ASRTGO (SCM_ISYMP (proc), badfun); | |
2208 | switch SCM_ISYMNUM (proc) | |
2209 | { | |
0f2d19dd JB |
2210 | case (SCM_ISYMNUM (SCM_IM_APPLY)): |
2211 | proc = SCM_CDR (x); | |
2212 | proc = EVALCAR (proc, env); | |
2213 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
2214 | if (SCM_CLOSUREP (proc)) | |
2215 | { | |
1609038c | 2216 | SCM argl, tl; |
6dbd0af5 | 2217 | PREP_APPLY (proc, SCM_EOL); |
0f2d19dd JB |
2218 | t.arg1 = SCM_CDR (SCM_CDR (x)); |
2219 | t.arg1 = EVALCAR (t.arg1, env); | |
a513ead3 MV |
2220 | apply_closure: |
2221 | /* Go here to tail-call a closure. PROC is the closure | |
2222 | and T.ARG1 is the list of arguments. Do not forget to | |
2223 | call PREP_APPLY. */ | |
6dbd0af5 MD |
2224 | #ifdef DEVAL |
2225 | debug.info->a.args = t.arg1; | |
2226 | #endif | |
cf7c17e9 | 2227 | #ifndef SCM_RECKLESS |
726d810a | 2228 | if (scm_badargsp (SCM_CLOSURE_FORMALS (proc), t.arg1)) |
0f2d19dd JB |
2229 | goto wrongnumargs; |
2230 | #endif | |
c79450dd | 2231 | ENTER_APPLY; |
1609038c MD |
2232 | /* Copy argument list */ |
2233 | if (SCM_IMP (t.arg1)) | |
2234 | argl = t.arg1; | |
2235 | else | |
2236 | { | |
2237 | argl = tl = scm_cons (SCM_CAR (t.arg1), SCM_UNSPECIFIED); | |
2238 | while (SCM_NIMP (t.arg1 = SCM_CDR (t.arg1)) | |
2239 | && SCM_CONSP (t.arg1)) | |
2240 | { | |
2241 | SCM_SETCDR (tl, scm_cons (SCM_CAR (t.arg1), | |
2242 | SCM_UNSPECIFIED)); | |
2243 | tl = SCM_CDR (tl); | |
2244 | } | |
2245 | SCM_SETCDR (tl, t.arg1); | |
2246 | } | |
2247 | ||
726d810a | 2248 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), argl, SCM_ENV (proc)); |
0f2d19dd | 2249 | x = SCM_CODE (proc); |
5280aaca | 2250 | goto nontoplevel_cdrxbegin; |
0f2d19dd | 2251 | } |
81123e6d | 2252 | proc = scm_f_apply; |
0f2d19dd JB |
2253 | goto evapply; |
2254 | ||
2255 | case (SCM_ISYMNUM (SCM_IM_CONT)): | |
5f144b10 GH |
2256 | { |
2257 | int first; | |
2258 | SCM val = scm_make_continuation (&first); | |
2259 | ||
2260 | if (first) | |
2261 | t.arg1 = val; | |
2262 | else | |
2263 | RETURN (val); | |
2264 | } | |
0f2d19dd JB |
2265 | proc = SCM_CDR (x); |
2266 | proc = evalcar (proc, env); | |
2267 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
6dbd0af5 MD |
2268 | PREP_APPLY (proc, scm_cons (t.arg1, SCM_EOL)); |
2269 | ENTER_APPLY; | |
a820af98 | 2270 | if (SCM_CLOSUREP(proc) && scm_badformalsp (proc, 1)) |
e37a4fba | 2271 | goto umwrongnumargs; |
0f2d19dd JB |
2272 | goto evap1; |
2273 | ||
a570e93a MD |
2274 | case (SCM_ISYMNUM (SCM_IM_DELAY)): |
2275 | RETURN (scm_makprom (scm_closure (SCM_CDR (x), env))) | |
2276 | ||
89efbff4 | 2277 | case (SCM_ISYMNUM (SCM_IM_DISPATCH)): |
195847fa MD |
2278 | proc = SCM_CADR (x); /* unevaluated operands */ |
2279 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2280 | if (SCM_IMP (proc)) | |
2281 | arg2 = *scm_ilookup (proc, env); | |
2282 | else if (SCM_NCONSP (proc)) | |
2283 | { | |
2284 | if (SCM_NCELLP (proc)) | |
2285 | arg2 = SCM_GLOC_VAL (proc); | |
2286 | else | |
2287 | arg2 = *scm_lookupcar (SCM_CDR (x), env, 1); | |
2288 | } | |
2289 | else | |
2290 | { | |
2291 | arg2 = scm_cons (EVALCAR (proc, env), SCM_EOL); | |
2292 | t.lloc = SCM_CDRLOC (arg2); | |
2293 | while (SCM_NIMP (proc = SCM_CDR (proc))) | |
2294 | { | |
2295 | *t.lloc = scm_cons (EVALCAR (proc, env), SCM_EOL); | |
2296 | t.lloc = SCM_CDRLOC (*t.lloc); | |
2297 | } | |
2298 | } | |
2299 | ||
2300 | type_dispatch: | |
61364ba6 MD |
2301 | /* The type dispatch code is duplicated here |
2302 | * (c.f. objects.c:scm_mcache_compute_cmethod) since that | |
2303 | * cuts down execution time for type dispatch to 50%. | |
2304 | */ | |
2305 | { | |
2306 | int i, n, end, mask; | |
2307 | SCM z = SCM_CDDR (x); | |
2308 | n = SCM_INUM (SCM_CAR (z)); /* maximum number of specializers */ | |
2309 | proc = SCM_CADR (z); | |
2310 | ||
2311 | if (SCM_NIMP (proc)) | |
2312 | { | |
2313 | /* Prepare for linear search */ | |
2314 | mask = -1; | |
2315 | i = 0; | |
b5c2579a | 2316 | end = SCM_VECTOR_LENGTH (proc); |
61364ba6 MD |
2317 | } |
2318 | else | |
2319 | { | |
2320 | /* Compute a hash value */ | |
2321 | int hashset = SCM_INUM (proc); | |
2322 | int j = n; | |
2323 | mask = SCM_INUM (SCM_CAR (z = SCM_CDDR (z))); | |
2324 | proc = SCM_CADR (z); | |
2325 | i = 0; | |
2326 | t.arg1 = arg2; | |
2327 | if (SCM_NIMP (t.arg1)) | |
2328 | do | |
2329 | { | |
d8c40b9f DH |
2330 | i += SCM_STRUCT_DATA (scm_class_of (SCM_CAR (t.arg1))) |
2331 | [scm_si_hashsets + hashset]; | |
61364ba6 MD |
2332 | t.arg1 = SCM_CDR (t.arg1); |
2333 | } | |
4ea6a431 | 2334 | while (j-- && SCM_NIMP (t.arg1)); |
61364ba6 MD |
2335 | i &= mask; |
2336 | end = i; | |
2337 | } | |
2338 | ||
2339 | /* Search for match */ | |
2340 | do | |
2341 | { | |
2342 | int j = n; | |
2343 | z = SCM_VELTS (proc)[i]; | |
2344 | t.arg1 = arg2; /* list of arguments */ | |
2345 | if (SCM_NIMP (t.arg1)) | |
2346 | do | |
2347 | { | |
2348 | /* More arguments than specifiers => CLASS != ENV */ | |
cf498326 | 2349 | if (! SCM_EQ_P (scm_class_of (SCM_CAR (t.arg1)), SCM_CAR (z))) |
61364ba6 MD |
2350 | goto next_method; |
2351 | t.arg1 = SCM_CDR (t.arg1); | |
2352 | z = SCM_CDR (z); | |
2353 | } | |
4ea6a431 | 2354 | while (j-- && SCM_NIMP (t.arg1)); |
61364ba6 MD |
2355 | /* Fewer arguments than specifiers => CAR != ENV */ |
2356 | if (!(SCM_IMP (SCM_CAR (z)) || SCM_CONSP (SCM_CAR (z)))) | |
2357 | goto next_method; | |
2358 | apply_cmethod: | |
2359 | env = EXTEND_ENV (SCM_CAR (SCM_CMETHOD_CODE (z)), | |
2360 | arg2, | |
2361 | SCM_CMETHOD_ENV (z)); | |
2362 | x = SCM_CMETHOD_CODE (z); | |
5280aaca | 2363 | goto nontoplevel_cdrxbegin; |
61364ba6 MD |
2364 | next_method: |
2365 | i = (i + 1) & mask; | |
2366 | } while (i != end); | |
2367 | ||
2368 | z = scm_memoize_method (x, arg2); | |
2369 | goto apply_cmethod; | |
2370 | } | |
73b64342 | 2371 | |
ca4be6ea MD |
2372 | case (SCM_ISYMNUM (SCM_IM_SLOT_REF)): |
2373 | x = SCM_CDR (x); | |
2374 | t.arg1 = EVALCAR (x, env); | |
d8c40b9f | 2375 | RETURN (SCM_PACK (SCM_STRUCT_DATA (t.arg1) [SCM_INUM (SCM_CADR (x))])) |
ca4be6ea MD |
2376 | |
2377 | case (SCM_ISYMNUM (SCM_IM_SLOT_SET_X)): | |
2378 | x = SCM_CDR (x); | |
2379 | t.arg1 = EVALCAR (x, env); | |
2380 | x = SCM_CDR (x); | |
2381 | proc = SCM_CDR (x); | |
d8c40b9f DH |
2382 | SCM_STRUCT_DATA (t.arg1) [SCM_INUM (SCM_CAR (x))] |
2383 | = SCM_UNPACK (EVALCAR (proc, env)); | |
5623a9b4 | 2384 | RETURN (SCM_UNSPECIFIED) |
ca4be6ea | 2385 | |
73b64342 MD |
2386 | case (SCM_ISYMNUM (SCM_IM_NIL_COND)): |
2387 | proc = SCM_CDR (x); | |
2388 | while (SCM_NIMP (x = SCM_CDR (proc))) | |
2389 | { | |
2390 | if (!(SCM_FALSEP (t.arg1 = EVALCAR (proc, env)) | |
3201d763 | 2391 | || SCM_EQ_P (t.arg1, scm_lisp_nil))) |
73b64342 | 2392 | { |
cf498326 | 2393 | if (SCM_EQ_P (SCM_CAR (x), SCM_UNSPECIFIED)) |
73b64342 MD |
2394 | RETURN (t.arg1); |
2395 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2396 | goto carloop; | |
2397 | } | |
2398 | proc = SCM_CDR (x); | |
2399 | } | |
2400 | x = proc; | |
2401 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2402 | goto carloop; | |
2403 | ||
2404 | case (SCM_ISYMNUM (SCM_IM_NIL_IFY)): | |
2405 | x = SCM_CDR (x); | |
2406 | RETURN ((SCM_FALSEP (proc = EVALCAR (x, env)) || SCM_NULLP (proc)) | |
43a912cf | 2407 | ? scm_lisp_nil |
73b64342 MD |
2408 | : proc) |
2409 | ||
2410 | case (SCM_ISYMNUM (SCM_IM_T_IFY)): | |
2411 | x = SCM_CDR (x); | |
43a912cf | 2412 | RETURN (SCM_NFALSEP (EVALCAR (x, env)) ? scm_lisp_t : scm_lisp_nil) |
73b64342 MD |
2413 | |
2414 | case (SCM_ISYMNUM (SCM_IM_0_COND)): | |
2415 | proc = SCM_CDR (x); | |
2416 | while (SCM_NIMP (x = SCM_CDR (proc))) | |
2417 | { | |
2418 | if (!(SCM_FALSEP (t.arg1 = EVALCAR (proc, env)) | |
3201d763 | 2419 | || SCM_EQ_P (t.arg1, SCM_INUM0))) |
73b64342 | 2420 | { |
cf498326 | 2421 | if (SCM_EQ_P (SCM_CAR (x), SCM_UNSPECIFIED)) |
73b64342 MD |
2422 | RETURN (t.arg1); |
2423 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2424 | goto carloop; | |
2425 | } | |
2426 | proc = SCM_CDR (x); | |
2427 | } | |
2428 | x = proc; | |
2429 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2430 | goto carloop; | |
2431 | ||
2432 | case (SCM_ISYMNUM (SCM_IM_0_IFY)): | |
2433 | x = SCM_CDR (x); | |
2434 | RETURN (SCM_FALSEP (proc = EVALCAR (x, env)) | |
2435 | ? SCM_INUM0 | |
2436 | : proc) | |
2437 | ||
2438 | case (SCM_ISYMNUM (SCM_IM_1_IFY)): | |
2439 | x = SCM_CDR (x); | |
2440 | RETURN (SCM_NFALSEP (EVALCAR (x, env)) | |
2441 | ? SCM_MAKINUM (1) | |
2442 | : SCM_INUM0) | |
2443 | ||
2444 | case (SCM_ISYMNUM (SCM_IM_BIND)): | |
2445 | x = SCM_CDR (x); | |
2446 | ||
2447 | t.arg1 = SCM_CAR (x); | |
2448 | arg2 = SCM_CDAR (env); | |
2449 | while (SCM_NIMP (arg2)) | |
2450 | { | |
2451 | proc = SCM_GLOC_VAL (SCM_CAR (t.arg1)); | |
a963f787 MD |
2452 | SCM_SETCDR (SCM_PACK (SCM_UNPACK (SCM_CAR (t.arg1)) - 1L), |
2453 | SCM_CAR (arg2)); | |
73b64342 MD |
2454 | SCM_SETCAR (arg2, proc); |
2455 | t.arg1 = SCM_CDR (t.arg1); | |
2456 | arg2 = SCM_CDR (arg2); | |
2457 | } | |
2458 | t.arg1 = SCM_CAR (x); | |
2459 | scm_dynwinds = scm_acons (t.arg1, SCM_CDAR (env), scm_dynwinds); | |
89efbff4 | 2460 | |
73b64342 MD |
2461 | arg2 = x = SCM_CDR (x); |
2462 | while (SCM_NNULLP (arg2 = SCM_CDR (arg2))) | |
2463 | { | |
2464 | SIDEVAL (SCM_CAR (x), env); | |
2465 | x = arg2; | |
2466 | } | |
2467 | proc = EVALCAR (x, env); | |
2468 | ||
2469 | scm_dynwinds = SCM_CDR (scm_dynwinds); | |
2470 | arg2 = SCM_CDAR (env); | |
2471 | while (SCM_NIMP (arg2)) | |
2472 | { | |
a963f787 MD |
2473 | SCM_SETCDR (SCM_PACK (SCM_UNPACK (SCM_CAR (t.arg1)) - 1L), |
2474 | SCM_CAR (arg2)); | |
73b64342 MD |
2475 | t.arg1 = SCM_CDR (t.arg1); |
2476 | arg2 = SCM_CDR (arg2); | |
2477 | } | |
2478 | ||
a513ead3 | 2479 | RETURN (proc); |
73b64342 | 2480 | |
a513ead3 MV |
2481 | case (SCM_ISYMNUM (SCM_IM_CALL_WITH_VALUES)): |
2482 | { | |
2483 | proc = SCM_CDR (x); | |
2484 | x = EVALCAR (proc, env); | |
2485 | proc = SCM_CDR (proc); | |
2486 | proc = EVALCAR (proc, env); | |
2487 | t.arg1 = SCM_APPLY (x, SCM_EOL, SCM_EOL); | |
2488 | if (SCM_VALUESP (t.arg1)) | |
2489 | t.arg1 = scm_struct_ref (t.arg1, SCM_INUM0); | |
2490 | else | |
2491 | t.arg1 = scm_cons (t.arg1, SCM_EOL); | |
2492 | if (SCM_CLOSUREP (proc)) | |
2493 | { | |
2494 | PREP_APPLY (proc, t.arg1); | |
2495 | goto apply_closure; | |
2496 | } | |
2497 | return SCM_APPLY (proc, t.arg1, SCM_EOL); | |
2498 | } | |
2499 | ||
0f2d19dd JB |
2500 | default: |
2501 | goto badfun; | |
2502 | } | |
2503 | ||
2504 | default: | |
2505 | proc = x; | |
2506 | badfun: | |
f5bf2977 | 2507 | /* scm_everr (x, env,...) */ |
e0c08f17 | 2508 | scm_misc_error (NULL, "Wrong type to apply: ~S", SCM_LIST1 (proc)); |
0f2d19dd JB |
2509 | case scm_tc7_vector: |
2510 | case scm_tc7_wvect: | |
afe5177e | 2511 | #ifdef HAVE_ARRAYS |
0f2d19dd JB |
2512 | case scm_tc7_bvect: |
2513 | case scm_tc7_byvect: | |
2514 | case scm_tc7_svect: | |
2515 | case scm_tc7_ivect: | |
2516 | case scm_tc7_uvect: | |
2517 | case scm_tc7_fvect: | |
2518 | case scm_tc7_dvect: | |
2519 | case scm_tc7_cvect: | |
5c11cc9d | 2520 | #ifdef HAVE_LONG_LONGS |
0f2d19dd | 2521 | case scm_tc7_llvect: |
afe5177e | 2522 | #endif |
0f2d19dd JB |
2523 | #endif |
2524 | case scm_tc7_string: | |
0f2d19dd | 2525 | case scm_tc7_substring: |
0f2d19dd JB |
2526 | case scm_tc7_smob: |
2527 | case scm_tcs_closures: | |
224822be | 2528 | case scm_tc7_cclo: |
89efbff4 | 2529 | case scm_tc7_pws: |
0f2d19dd JB |
2530 | case scm_tcs_subrs: |
2531 | RETURN (x); | |
2532 | ||
2533 | #ifdef MEMOIZE_LOCALS | |
c209c88e | 2534 | case SCM_BIT8(SCM_ILOC00): |
0f2d19dd JB |
2535 | proc = *scm_ilookup (SCM_CAR (x), env); |
2536 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
cf7c17e9 JB |
2537 | #ifndef SCM_RECKLESS |
2538 | #ifdef SCM_CAUTIOUS | |
0f2d19dd JB |
2539 | goto checkargs; |
2540 | #endif | |
2541 | #endif | |
2542 | break; | |
2543 | #endif /* ifdef MEMOIZE_LOCALS */ | |
2544 | ||
2545 | ||
3201d763 DH |
2546 | case scm_tcs_cons_gloc: { |
2547 | scm_bits_t vcell = SCM_STRUCT_VTABLE_DATA (x) [scm_vtable_index_vcell]; | |
2548 | if (vcell == 0) { | |
aa00bd1e MD |
2549 | /* This is a struct implanted in the code, not a gloc. */ |
2550 | RETURN (x); | |
3201d763 | 2551 | } else { |
86d31dfe | 2552 | proc = SCM_GLOC_VAL (SCM_CAR (x)); |
3201d763 | 2553 | SCM_ASRTGO (SCM_NIMP (proc), badfun); |
cf7c17e9 JB |
2554 | #ifndef SCM_RECKLESS |
2555 | #ifdef SCM_CAUTIOUS | |
3201d763 | 2556 | goto checkargs; |
0f2d19dd JB |
2557 | #endif |
2558 | #endif | |
3201d763 | 2559 | } |
0f2d19dd | 2560 | break; |
3201d763 | 2561 | } |
0f2d19dd JB |
2562 | |
2563 | case scm_tcs_cons_nimcar: | |
86d31dfe MV |
2564 | orig_sym = SCM_CAR (x); |
2565 | if (SCM_SYMBOLP (orig_sym)) | |
0f2d19dd | 2566 | { |
f8769b1d | 2567 | #ifdef USE_THREADS |
26d5b9b4 | 2568 | t.lloc = scm_lookupcar1 (x, env, 1); |
f8769b1d MV |
2569 | if (t.lloc == NULL) |
2570 | { | |
2571 | /* we have lost the race, start again. */ | |
2572 | goto dispatch; | |
2573 | } | |
2574 | proc = *t.lloc; | |
2575 | #else | |
26d5b9b4 | 2576 | proc = *scm_lookupcar (x, env, 1); |
f8769b1d MV |
2577 | #endif |
2578 | ||
0f2d19dd JB |
2579 | if (SCM_IMP (proc)) |
2580 | { | |
86d31dfe MV |
2581 | SCM_SETCAR (x, orig_sym); /* Undo memoizing effect of |
2582 | lookupcar */ | |
0f2d19dd JB |
2583 | goto badfun; |
2584 | } | |
22a52da1 | 2585 | if (SCM_MACROP (proc)) |
0f2d19dd | 2586 | { |
86d31dfe MV |
2587 | SCM_SETCAR (x, orig_sym); /* Undo memoizing effect of |
2588 | lookupcar */ | |
0f2d19dd | 2589 | handle_a_macro: |
368bf056 | 2590 | #ifdef DEVAL |
7c354052 MD |
2591 | /* Set a flag during macro expansion so that macro |
2592 | application frames can be deleted from the backtrace. */ | |
2593 | SCM_SET_MACROEXP (debug); | |
368bf056 | 2594 | #endif |
22a52da1 | 2595 | t.arg1 = SCM_APPLY (SCM_MACRO_CODE (proc), x, |
f8769b1d MV |
2596 | scm_cons (env, scm_listofnull)); |
2597 | ||
7c354052 MD |
2598 | #ifdef DEVAL |
2599 | SCM_CLEAR_MACROEXP (debug); | |
2600 | #endif | |
22a52da1 | 2601 | switch (SCM_MACRO_TYPE (proc)) |
0f2d19dd JB |
2602 | { |
2603 | case 2: | |
2604 | if (scm_ilength (t.arg1) <= 0) | |
2605 | t.arg1 = scm_cons2 (SCM_IM_BEGIN, t.arg1, SCM_EOL); | |
6dbd0af5 | 2606 | #ifdef DEVAL |
22a52da1 | 2607 | if (!SCM_CLOSUREP (SCM_MACRO_CODE (proc))) |
6dbd0af5 | 2608 | { |
6dbd0af5 | 2609 | SCM_DEFER_INTS; |
a23afe53 MD |
2610 | SCM_SETCAR (x, SCM_CAR (t.arg1)); |
2611 | SCM_SETCDR (x, SCM_CDR (t.arg1)); | |
6dbd0af5 MD |
2612 | SCM_ALLOW_INTS; |
2613 | goto dispatch; | |
2614 | } | |
2615 | /* Prevent memoizing of debug info expression. */ | |
6203706f MD |
2616 | debug.info->e.exp = scm_cons_source (debug.info->e.exp, |
2617 | SCM_CAR (x), | |
2618 | SCM_CDR (x)); | |
6dbd0af5 | 2619 | #endif |
0f2d19dd | 2620 | SCM_DEFER_INTS; |
a23afe53 MD |
2621 | SCM_SETCAR (x, SCM_CAR (t.arg1)); |
2622 | SCM_SETCDR (x, SCM_CDR (t.arg1)); | |
0f2d19dd | 2623 | SCM_ALLOW_INTS; |
6dbd0af5 | 2624 | goto loopnoap; |
0f2d19dd JB |
2625 | case 1: |
2626 | if (SCM_NIMP (x = t.arg1)) | |
6dbd0af5 | 2627 | goto loopnoap; |
0f2d19dd JB |
2628 | case 0: |
2629 | RETURN (t.arg1); | |
2630 | } | |
2631 | } | |
2632 | } | |
2633 | else | |
2634 | proc = SCM_CEVAL (SCM_CAR (x), env); | |
22a52da1 | 2635 | SCM_ASRTGO (!SCM_IMP (proc), badfun); |
cf7c17e9 JB |
2636 | #ifndef SCM_RECKLESS |
2637 | #ifdef SCM_CAUTIOUS | |
0f2d19dd JB |
2638 | checkargs: |
2639 | #endif | |
2640 | if (SCM_CLOSUREP (proc)) | |
2641 | { | |
726d810a | 2642 | arg2 = SCM_CLOSURE_FORMALS (proc); |
0f2d19dd | 2643 | t.arg1 = SCM_CDR (x); |
726d810a | 2644 | while (!SCM_NULLP (arg2)) |
0f2d19dd | 2645 | { |
22a52da1 | 2646 | if (!SCM_CONSP (arg2)) |
0f2d19dd JB |
2647 | goto evapply; |
2648 | if (SCM_IMP (t.arg1)) | |
2649 | goto umwrongnumargs; | |
2650 | arg2 = SCM_CDR (arg2); | |
2651 | t.arg1 = SCM_CDR (t.arg1); | |
2652 | } | |
22a52da1 | 2653 | if (!SCM_NULLP (t.arg1)) |
0f2d19dd JB |
2654 | goto umwrongnumargs; |
2655 | } | |
22a52da1 | 2656 | else if (SCM_MACROP (proc)) |
0f2d19dd JB |
2657 | goto handle_a_macro; |
2658 | #endif | |
2659 | } | |
2660 | ||
2661 | ||
6dbd0af5 MD |
2662 | evapply: |
2663 | PREP_APPLY (proc, SCM_EOL); | |
2664 | if (SCM_NULLP (SCM_CDR (x))) { | |
2665 | ENTER_APPLY; | |
89efbff4 | 2666 | evap0: |
0f2d19dd JB |
2667 | switch (SCM_TYP7 (proc)) |
2668 | { /* no arguments given */ | |
2669 | case scm_tc7_subr_0: | |
2670 | RETURN (SCM_SUBRF (proc) ()); | |
2671 | case scm_tc7_subr_1o: | |
2672 | RETURN (SCM_SUBRF (proc) (SCM_UNDEFINED)); | |
2673 | case scm_tc7_lsubr: | |
2674 | RETURN (SCM_SUBRF (proc) (SCM_EOL)); | |
2675 | case scm_tc7_rpsubr: | |
2676 | RETURN (SCM_BOOL_T); | |
2677 | case scm_tc7_asubr: | |
2678 | RETURN (SCM_SUBRF (proc) (SCM_UNDEFINED, SCM_UNDEFINED)); | |
0717dfd8 | 2679 | case scm_tc7_smob: |
68b06924 | 2680 | if (!SCM_SMOB_APPLICABLE_P (proc)) |
0717dfd8 | 2681 | goto badfun; |
68b06924 | 2682 | RETURN (SCM_SMOB_APPLY_0 (proc)); |
0f2d19dd JB |
2683 | case scm_tc7_cclo: |
2684 | t.arg1 = proc; | |
2685 | proc = SCM_CCLO_SUBR (proc); | |
6dbd0af5 MD |
2686 | #ifdef DEVAL |
2687 | debug.info->a.proc = proc; | |
2688 | debug.info->a.args = scm_cons (t.arg1, SCM_EOL); | |
2689 | #endif | |
0f2d19dd | 2690 | goto evap1; |
89efbff4 MD |
2691 | case scm_tc7_pws: |
2692 | proc = SCM_PROCEDURE (proc); | |
2693 | #ifdef DEVAL | |
2694 | debug.info->a.proc = proc; | |
2695 | #endif | |
002f1a5d MD |
2696 | if (!SCM_CLOSUREP (proc)) |
2697 | goto evap0; | |
2698 | if (scm_badformalsp (proc, 0)) | |
2699 | goto umwrongnumargs; | |
0f2d19dd JB |
2700 | case scm_tcs_closures: |
2701 | x = SCM_CODE (proc); | |
726d810a | 2702 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), SCM_EOL, SCM_ENV (proc)); |
5280aaca | 2703 | goto nontoplevel_cdrxbegin; |
86d31dfe | 2704 | case scm_tcs_cons_gloc: /* really structs, not glocs */ |
195847fa MD |
2705 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) |
2706 | { | |
2707 | x = SCM_ENTITY_PROCEDURE (proc); | |
2708 | arg2 = SCM_EOL; | |
2709 | goto type_dispatch; | |
2710 | } | |
2711 | else if (!SCM_I_OPERATORP (proc)) | |
9b07e212 MD |
2712 | goto badfun; |
2713 | else | |
da7f71d7 | 2714 | { |
195847fa MD |
2715 | t.arg1 = proc; |
2716 | proc = (SCM_I_ENTITYP (proc) | |
2717 | ? SCM_ENTITY_PROCEDURE (proc) | |
2718 | : SCM_OPERATOR_PROCEDURE (proc)); | |
da7f71d7 | 2719 | #ifdef DEVAL |
195847fa MD |
2720 | debug.info->a.proc = proc; |
2721 | debug.info->a.args = scm_cons (t.arg1, SCM_EOL); | |
da7f71d7 | 2722 | #endif |
195847fa MD |
2723 | if (SCM_NIMP (proc)) |
2724 | goto evap1; | |
2725 | else | |
2726 | goto badfun; | |
da7f71d7 | 2727 | } |
0f2d19dd JB |
2728 | case scm_tc7_subr_1: |
2729 | case scm_tc7_subr_2: | |
2730 | case scm_tc7_subr_2o: | |
2731 | case scm_tc7_cxr: | |
2732 | case scm_tc7_subr_3: | |
2733 | case scm_tc7_lsubr_2: | |
2734 | umwrongnumargs: | |
2735 | unmemocar (x, env); | |
2736 | wrongnumargs: | |
f5bf2977 GH |
2737 | /* scm_everr (x, env,...) */ |
2738 | scm_wrong_num_args (proc); | |
0f2d19dd JB |
2739 | default: |
2740 | /* handle macros here */ | |
2741 | goto badfun; | |
2742 | } | |
6dbd0af5 | 2743 | } |
0f2d19dd JB |
2744 | |
2745 | /* must handle macros by here */ | |
2746 | x = SCM_CDR (x); | |
cf7c17e9 | 2747 | #ifdef SCM_CAUTIOUS |
0f2d19dd JB |
2748 | if (SCM_IMP (x)) |
2749 | goto wrongnumargs; | |
680ed4a8 MD |
2750 | else if (SCM_CONSP (x)) |
2751 | { | |
2752 | if (SCM_IMP (SCM_CAR (x))) | |
6cb702da | 2753 | t.arg1 = SCM_EVALIM (SCM_CAR (x), env); |
680ed4a8 MD |
2754 | else |
2755 | t.arg1 = EVALCELLCAR (x, env); | |
2756 | } | |
3201d763 | 2757 | else if (SCM_TYP3 (x) == scm_tc3_cons_gloc) |
680ed4a8 | 2758 | { |
3201d763 DH |
2759 | scm_bits_t vcell = SCM_STRUCT_VTABLE_DATA (x) [scm_vtable_index_vcell]; |
2760 | if (vcell == 0) | |
680ed4a8 | 2761 | t.arg1 = SCM_CAR (x); /* struct planted in code */ |
3201d763 | 2762 | else |
86d31dfe | 2763 | t.arg1 = SCM_GLOC_VAL (SCM_CAR (x)); |
680ed4a8 MD |
2764 | } |
2765 | else | |
2766 | goto wrongnumargs; | |
2767 | #else | |
0f2d19dd | 2768 | t.arg1 = EVALCAR (x, env); |
680ed4a8 | 2769 | #endif |
6dbd0af5 MD |
2770 | #ifdef DEVAL |
2771 | debug.info->a.args = scm_cons (t.arg1, SCM_EOL); | |
2772 | #endif | |
0f2d19dd JB |
2773 | x = SCM_CDR (x); |
2774 | if (SCM_NULLP (x)) | |
2775 | { | |
6dbd0af5 | 2776 | ENTER_APPLY; |
0f2d19dd JB |
2777 | evap1: |
2778 | switch (SCM_TYP7 (proc)) | |
6dbd0af5 | 2779 | { /* have one argument in t.arg1 */ |
0f2d19dd JB |
2780 | case scm_tc7_subr_2o: |
2781 | RETURN (SCM_SUBRF (proc) (t.arg1, SCM_UNDEFINED)); | |
2782 | case scm_tc7_subr_1: | |
2783 | case scm_tc7_subr_1o: | |
2784 | RETURN (SCM_SUBRF (proc) (t.arg1)); | |
2785 | case scm_tc7_cxr: | |
0f2d19dd JB |
2786 | if (SCM_SUBRF (proc)) |
2787 | { | |
2788 | if (SCM_INUMP (t.arg1)) | |
2789 | { | |
f8de44c1 | 2790 | RETURN (scm_make_real (SCM_DSUBRF (proc) ((double) SCM_INUM (t.arg1)))); |
0f2d19dd JB |
2791 | } |
2792 | SCM_ASRTGO (SCM_NIMP (t.arg1), floerr); | |
2793 | if (SCM_REALP (t.arg1)) | |
2794 | { | |
eb42e2f0 | 2795 | RETURN (scm_make_real (SCM_DSUBRF (proc) (SCM_REAL_VALUE (t.arg1)))); |
0f2d19dd JB |
2796 | } |
2797 | #ifdef SCM_BIGDIG | |
2798 | if (SCM_BIGP (t.arg1)) | |
2799 | { | |
f8de44c1 | 2800 | RETURN (scm_make_real (SCM_DSUBRF (proc) (scm_big2dbl (t.arg1)))); |
0f2d19dd JB |
2801 | } |
2802 | #endif | |
2803 | floerr: | |
9de33deb | 2804 | SCM_WTA_DISPATCH_1 (*SCM_SUBR_GENERIC (proc), t.arg1, |
3db4adfc | 2805 | SCM_ARG1, SCM_SYMBOL_CHARS (SCM_SNAME (proc))); |
0f2d19dd | 2806 | } |
3201d763 | 2807 | proc = SCM_SNAME (proc); |
0f2d19dd | 2808 | { |
b5c2579a | 2809 | char *chrs = SCM_SYMBOL_CHARS (proc) + SCM_SYMBOL_LENGTH (proc) - 1; |
0f2d19dd JB |
2810 | while ('c' != *--chrs) |
2811 | { | |
0c95b57d | 2812 | SCM_ASSERT (SCM_CONSP (t.arg1), |
3db4adfc | 2813 | t.arg1, SCM_ARG1, SCM_SYMBOL_CHARS (proc)); |
0f2d19dd JB |
2814 | t.arg1 = ('a' == *chrs) ? SCM_CAR (t.arg1) : SCM_CDR (t.arg1); |
2815 | } | |
2816 | RETURN (t.arg1); | |
2817 | } | |
2818 | case scm_tc7_rpsubr: | |
2819 | RETURN (SCM_BOOL_T); | |
2820 | case scm_tc7_asubr: | |
2821 | RETURN (SCM_SUBRF (proc) (t.arg1, SCM_UNDEFINED)); | |
2822 | case scm_tc7_lsubr: | |
2823 | #ifdef DEVAL | |
6dbd0af5 | 2824 | RETURN (SCM_SUBRF (proc) (debug.info->a.args)) |
0f2d19dd JB |
2825 | #else |
2826 | RETURN (SCM_SUBRF (proc) (scm_cons (t.arg1, SCM_EOL))); | |
2827 | #endif | |
0717dfd8 | 2828 | case scm_tc7_smob: |
68b06924 | 2829 | if (!SCM_SMOB_APPLICABLE_P (proc)) |
0717dfd8 | 2830 | goto badfun; |
68b06924 | 2831 | RETURN (SCM_SMOB_APPLY_1 (proc, t.arg1)); |
0f2d19dd JB |
2832 | case scm_tc7_cclo: |
2833 | arg2 = t.arg1; | |
2834 | t.arg1 = proc; | |
2835 | proc = SCM_CCLO_SUBR (proc); | |
6dbd0af5 MD |
2836 | #ifdef DEVAL |
2837 | debug.info->a.args = scm_cons (t.arg1, debug.info->a.args); | |
2838 | debug.info->a.proc = proc; | |
2839 | #endif | |
0f2d19dd | 2840 | goto evap2; |
89efbff4 MD |
2841 | case scm_tc7_pws: |
2842 | proc = SCM_PROCEDURE (proc); | |
2843 | #ifdef DEVAL | |
2844 | debug.info->a.proc = proc; | |
2845 | #endif | |
002f1a5d MD |
2846 | if (!SCM_CLOSUREP (proc)) |
2847 | goto evap1; | |
2848 | if (scm_badformalsp (proc, 1)) | |
2849 | goto umwrongnumargs; | |
0f2d19dd | 2850 | case scm_tcs_closures: |
195847fa | 2851 | /* clos1: */ |
0f2d19dd JB |
2852 | x = SCM_CODE (proc); |
2853 | #ifdef DEVAL | |
726d810a | 2854 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), debug.info->a.args, SCM_ENV (proc)); |
0f2d19dd | 2855 | #else |
726d810a | 2856 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), scm_cons (t.arg1, SCM_EOL), SCM_ENV (proc)); |
0f2d19dd | 2857 | #endif |
5280aaca | 2858 | goto nontoplevel_cdrxbegin; |
86d31dfe | 2859 | case scm_tcs_cons_gloc: /* really structs, not glocs */ |
f3d2630a MD |
2860 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) |
2861 | { | |
195847fa | 2862 | x = SCM_ENTITY_PROCEDURE (proc); |
f3d2630a MD |
2863 | #ifdef DEVAL |
2864 | arg2 = debug.info->a.args; | |
2865 | #else | |
2866 | arg2 = scm_cons (t.arg1, SCM_EOL); | |
2867 | #endif | |
f3d2630a MD |
2868 | goto type_dispatch; |
2869 | } | |
2870 | else if (!SCM_I_OPERATORP (proc)) | |
9b07e212 MD |
2871 | goto badfun; |
2872 | else | |
0c32d76c | 2873 | { |
195847fa MD |
2874 | arg2 = t.arg1; |
2875 | t.arg1 = proc; | |
2876 | proc = (SCM_I_ENTITYP (proc) | |
2877 | ? SCM_ENTITY_PROCEDURE (proc) | |
2878 | : SCM_OPERATOR_PROCEDURE (proc)); | |
0c32d76c | 2879 | #ifdef DEVAL |
195847fa MD |
2880 | debug.info->a.args = scm_cons (t.arg1, debug.info->a.args); |
2881 | debug.info->a.proc = proc; | |
0c32d76c | 2882 | #endif |
195847fa MD |
2883 | if (SCM_NIMP (proc)) |
2884 | goto evap2; | |
2885 | else | |
2886 | goto badfun; | |
0c32d76c | 2887 | } |
0f2d19dd JB |
2888 | case scm_tc7_subr_2: |
2889 | case scm_tc7_subr_0: | |
2890 | case scm_tc7_subr_3: | |
2891 | case scm_tc7_lsubr_2: | |
2892 | goto wrongnumargs; | |
2893 | default: | |
2894 | goto badfun; | |
2895 | } | |
2896 | } | |
cf7c17e9 | 2897 | #ifdef SCM_CAUTIOUS |
0f2d19dd JB |
2898 | if (SCM_IMP (x)) |
2899 | goto wrongnumargs; | |
680ed4a8 MD |
2900 | else if (SCM_CONSP (x)) |
2901 | { | |
2902 | if (SCM_IMP (SCM_CAR (x))) | |
6cb702da | 2903 | arg2 = SCM_EVALIM (SCM_CAR (x), env); |
680ed4a8 MD |
2904 | else |
2905 | arg2 = EVALCELLCAR (x, env); | |
2906 | } | |
3201d763 | 2907 | else if (SCM_TYP3 (x) == scm_tc3_cons_gloc) |
680ed4a8 | 2908 | { |
3201d763 DH |
2909 | scm_bits_t vcell = SCM_STRUCT_VTABLE_DATA (x) [scm_vtable_index_vcell]; |
2910 | if (vcell == 0) | |
680ed4a8 | 2911 | arg2 = SCM_CAR (x); /* struct planted in code */ |
3201d763 | 2912 | else |
86d31dfe | 2913 | arg2 = SCM_GLOC_VAL (SCM_CAR (x)); |
680ed4a8 MD |
2914 | } |
2915 | else | |
2916 | goto wrongnumargs; | |
2917 | #else | |
2918 | arg2 = EVALCAR (x, env); | |
0f2d19dd JB |
2919 | #endif |
2920 | { /* have two or more arguments */ | |
6dbd0af5 MD |
2921 | #ifdef DEVAL |
2922 | debug.info->a.args = scm_cons2 (t.arg1, arg2, SCM_EOL); | |
2923 | #endif | |
0f2d19dd JB |
2924 | x = SCM_CDR (x); |
2925 | if (SCM_NULLP (x)) { | |
6dbd0af5 | 2926 | ENTER_APPLY; |
0f2d19dd | 2927 | evap2: |
6dbd0af5 MD |
2928 | switch (SCM_TYP7 (proc)) |
2929 | { /* have two arguments */ | |
2930 | case scm_tc7_subr_2: | |
2931 | case scm_tc7_subr_2o: | |
2932 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2)); | |
2933 | case scm_tc7_lsubr: | |
0f2d19dd | 2934 | #ifdef DEVAL |
6dbd0af5 MD |
2935 | RETURN (SCM_SUBRF (proc) (debug.info->a.args)) |
2936 | #else | |
2937 | RETURN (SCM_SUBRF (proc) (scm_cons2 (t.arg1, arg2, SCM_EOL))); | |
0f2d19dd | 2938 | #endif |
6dbd0af5 MD |
2939 | case scm_tc7_lsubr_2: |
2940 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, SCM_EOL)); | |
2941 | case scm_tc7_rpsubr: | |
2942 | case scm_tc7_asubr: | |
2943 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2)); | |
0717dfd8 | 2944 | case scm_tc7_smob: |
68b06924 | 2945 | if (!SCM_SMOB_APPLICABLE_P (proc)) |
0717dfd8 | 2946 | goto badfun; |
68b06924 | 2947 | RETURN (SCM_SMOB_APPLY_2 (proc, t.arg1, arg2)); |
6dbd0af5 MD |
2948 | cclon: |
2949 | case scm_tc7_cclo: | |
0f2d19dd | 2950 | #ifdef DEVAL |
195847fa MD |
2951 | RETURN (SCM_APPLY (SCM_CCLO_SUBR (proc), |
2952 | scm_cons (proc, debug.info->a.args), | |
2953 | SCM_EOL)); | |
0f2d19dd | 2954 | #else |
195847fa MD |
2955 | RETURN (SCM_APPLY (SCM_CCLO_SUBR (proc), |
2956 | scm_cons2 (proc, t.arg1, | |
2957 | scm_cons (arg2, | |
2958 | scm_eval_args (x, | |
2959 | env, | |
2960 | proc))), | |
2961 | SCM_EOL)); | |
6dbd0af5 | 2962 | #endif |
86d31dfe | 2963 | case scm_tcs_cons_gloc: /* really structs, not glocs */ |
f3d2630a MD |
2964 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) |
2965 | { | |
195847fa | 2966 | x = SCM_ENTITY_PROCEDURE (proc); |
f3d2630a MD |
2967 | #ifdef DEVAL |
2968 | arg2 = debug.info->a.args; | |
2969 | #else | |
2970 | arg2 = scm_cons2 (t.arg1, arg2, SCM_EOL); | |
2971 | #endif | |
f3d2630a MD |
2972 | goto type_dispatch; |
2973 | } | |
2974 | else if (!SCM_I_OPERATORP (proc)) | |
9b07e212 MD |
2975 | goto badfun; |
2976 | else | |
0c32d76c | 2977 | { |
195847fa | 2978 | operatorn: |
0c32d76c | 2979 | #ifdef DEVAL |
195847fa MD |
2980 | RETURN (SCM_APPLY (SCM_I_ENTITYP (proc) |
2981 | ? SCM_ENTITY_PROCEDURE (proc) | |
2982 | : SCM_OPERATOR_PROCEDURE (proc), | |
2983 | scm_cons (proc, debug.info->a.args), | |
2984 | SCM_EOL)); | |
2985 | #else | |
2986 | RETURN (SCM_APPLY (SCM_I_ENTITYP (proc) | |
2987 | ? SCM_ENTITY_PROCEDURE (proc) | |
2988 | : SCM_OPERATOR_PROCEDURE (proc), | |
2989 | scm_cons2 (proc, t.arg1, | |
2990 | scm_cons (arg2, | |
2991 | scm_eval_args (x, | |
2992 | env, | |
2993 | proc))), | |
2994 | SCM_EOL)); | |
2995 | #endif | |
0c32d76c | 2996 | } |
6dbd0af5 MD |
2997 | case scm_tc7_subr_0: |
2998 | case scm_tc7_cxr: | |
2999 | case scm_tc7_subr_1o: | |
3000 | case scm_tc7_subr_1: | |
3001 | case scm_tc7_subr_3: | |
6dbd0af5 MD |
3002 | goto wrongnumargs; |
3003 | default: | |
3004 | goto badfun; | |
002f1a5d MD |
3005 | case scm_tc7_pws: |
3006 | proc = SCM_PROCEDURE (proc); | |
3007 | #ifdef DEVAL | |
3008 | debug.info->a.proc = proc; | |
3009 | #endif | |
3010 | if (!SCM_CLOSUREP (proc)) | |
3011 | goto evap2; | |
3012 | if (scm_badformalsp (proc, 2)) | |
3013 | goto umwrongnumargs; | |
6dbd0af5 | 3014 | case scm_tcs_closures: |
195847fa | 3015 | /* clos2: */ |
0f2d19dd | 3016 | #ifdef DEVAL |
726d810a | 3017 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), |
da7f71d7 MD |
3018 | debug.info->a.args, |
3019 | SCM_ENV (proc)); | |
0f2d19dd | 3020 | #else |
726d810a | 3021 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), |
da7f71d7 | 3022 | scm_cons2 (t.arg1, arg2, SCM_EOL), SCM_ENV (proc)); |
0f2d19dd | 3023 | #endif |
6dbd0af5 | 3024 | x = SCM_CODE (proc); |
5280aaca | 3025 | goto nontoplevel_cdrxbegin; |
6dbd0af5 | 3026 | } |
0f2d19dd | 3027 | } |
cf7c17e9 | 3028 | #ifdef SCM_CAUTIOUS |
680ed4a8 MD |
3029 | if (SCM_IMP (x) || SCM_NECONSP (x)) |
3030 | goto wrongnumargs; | |
3031 | #endif | |
0f2d19dd | 3032 | #ifdef DEVAL |
6dbd0af5 | 3033 | debug.info->a.args = scm_cons2 (t.arg1, arg2, |
680ed4a8 MD |
3034 | scm_deval_args (x, env, proc, |
3035 | SCM_CDRLOC (SCM_CDR (debug.info->a.args)))); | |
0f2d19dd | 3036 | #endif |
6dbd0af5 | 3037 | ENTER_APPLY; |
89efbff4 | 3038 | evap3: |
6dbd0af5 MD |
3039 | switch (SCM_TYP7 (proc)) |
3040 | { /* have 3 or more arguments */ | |
0f2d19dd | 3041 | #ifdef DEVAL |
6dbd0af5 MD |
3042 | case scm_tc7_subr_3: |
3043 | SCM_ASRTGO (SCM_NULLP (SCM_CDR (x)), wrongnumargs); | |
da7f71d7 MD |
3044 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, |
3045 | SCM_CADDR (debug.info->a.args))); | |
6dbd0af5 | 3046 | case scm_tc7_asubr: |
399dedcc MD |
3047 | #ifdef BUILTIN_RPASUBR |
3048 | t.arg1 = SCM_SUBRF(proc)(t.arg1, arg2); | |
3049 | arg2 = SCM_CDR (SCM_CDR (debug.info->a.args)); | |
da7f71d7 MD |
3050 | do |
3051 | { | |
3052 | t.arg1 = SCM_SUBRF(proc)(t.arg1, SCM_CAR (arg2)); | |
3053 | arg2 = SCM_CDR (arg2); | |
3054 | } | |
3055 | while (SCM_NIMP (arg2)); | |
399dedcc MD |
3056 | RETURN (t.arg1) |
3057 | #endif /* BUILTIN_RPASUBR */ | |
6dbd0af5 | 3058 | case scm_tc7_rpsubr: |
71d3aa6d MD |
3059 | #ifdef BUILTIN_RPASUBR |
3060 | if (SCM_FALSEP (SCM_SUBRF (proc) (t.arg1, arg2))) | |
3061 | RETURN (SCM_BOOL_F) | |
3062 | t.arg1 = SCM_CDR (SCM_CDR (debug.info->a.args)); | |
da7f71d7 MD |
3063 | do |
3064 | { | |
3065 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg2, SCM_CAR (t.arg1)))) | |
3066 | RETURN (SCM_BOOL_F) | |
3067 | arg2 = SCM_CAR (t.arg1); | |
3068 | t.arg1 = SCM_CDR (t.arg1); | |
3069 | } | |
3070 | while (SCM_NIMP (t.arg1)); | |
71d3aa6d MD |
3071 | RETURN (SCM_BOOL_T) |
3072 | #else /* BUILTIN_RPASUBR */ | |
da7f71d7 MD |
3073 | RETURN (SCM_APPLY (proc, t.arg1, |
3074 | scm_acons (arg2, | |
3075 | SCM_CDR (SCM_CDR (debug.info->a.args)), | |
3076 | SCM_EOL))) | |
71d3aa6d | 3077 | #endif /* BUILTIN_RPASUBR */ |
399dedcc | 3078 | case scm_tc7_lsubr_2: |
da7f71d7 MD |
3079 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, |
3080 | SCM_CDR (SCM_CDR (debug.info->a.args)))) | |
399dedcc MD |
3081 | case scm_tc7_lsubr: |
3082 | RETURN (SCM_SUBRF (proc) (debug.info->a.args)) | |
0717dfd8 | 3083 | case scm_tc7_smob: |
68b06924 | 3084 | if (!SCM_SMOB_APPLICABLE_P (proc)) |
0717dfd8 | 3085 | goto badfun; |
68b06924 KN |
3086 | RETURN (SCM_SMOB_APPLY_3 (proc, t.arg1, arg2, |
3087 | SCM_CDDR (debug.info->a.args))); | |
6dbd0af5 MD |
3088 | case scm_tc7_cclo: |
3089 | goto cclon; | |
89efbff4 MD |
3090 | case scm_tc7_pws: |
3091 | proc = SCM_PROCEDURE (proc); | |
3092 | debug.info->a.proc = proc; | |
002f1a5d MD |
3093 | if (!SCM_CLOSUREP (proc)) |
3094 | goto evap3; | |
726d810a | 3095 | if (scm_badargsp (SCM_CLOSURE_FORMALS (proc), debug.info->a.args)) |
002f1a5d | 3096 | goto umwrongnumargs; |
6dbd0af5 | 3097 | case scm_tcs_closures: |
b7ff98dd | 3098 | SCM_SET_ARGSREADY (debug); |
726d810a | 3099 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), |
6dbd0af5 MD |
3100 | debug.info->a.args, |
3101 | SCM_ENV (proc)); | |
3102 | x = SCM_CODE (proc); | |
5280aaca | 3103 | goto nontoplevel_cdrxbegin; |
6dbd0af5 MD |
3104 | #else /* DEVAL */ |
3105 | case scm_tc7_subr_3: | |
3106 | SCM_ASRTGO (SCM_NULLP (SCM_CDR (x)), wrongnumargs); | |
3107 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, EVALCAR (x, env))); | |
3108 | case scm_tc7_asubr: | |
399dedcc | 3109 | #ifdef BUILTIN_RPASUBR |
da7f71d7 MD |
3110 | t.arg1 = SCM_SUBRF (proc) (t.arg1, arg2); |
3111 | do | |
3112 | { | |
3113 | t.arg1 = SCM_SUBRF(proc)(t.arg1, EVALCAR(x, env)); | |
3114 | x = SCM_CDR(x); | |
3115 | } | |
3116 | while (SCM_NIMP (x)); | |
399dedcc MD |
3117 | RETURN (t.arg1) |
3118 | #endif /* BUILTIN_RPASUBR */ | |
6dbd0af5 | 3119 | case scm_tc7_rpsubr: |
71d3aa6d MD |
3120 | #ifdef BUILTIN_RPASUBR |
3121 | if (SCM_FALSEP (SCM_SUBRF (proc) (t.arg1, arg2))) | |
3122 | RETURN (SCM_BOOL_F) | |
da7f71d7 MD |
3123 | do |
3124 | { | |
3125 | t.arg1 = EVALCAR (x, env); | |
3126 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg2, t.arg1))) | |
3127 | RETURN (SCM_BOOL_F) | |
3128 | arg2 = t.arg1; | |
3129 | x = SCM_CDR (x); | |
3130 | } | |
3131 | while (SCM_NIMP (x)); | |
71d3aa6d MD |
3132 | RETURN (SCM_BOOL_T) |
3133 | #else /* BUILTIN_RPASUBR */ | |
da7f71d7 | 3134 | RETURN (SCM_APPLY (proc, t.arg1, |
680ed4a8 MD |
3135 | scm_acons (arg2, |
3136 | scm_eval_args (x, env, proc), | |
3137 | SCM_EOL))); | |
71d3aa6d | 3138 | #endif /* BUILTIN_RPASUBR */ |
6dbd0af5 | 3139 | case scm_tc7_lsubr_2: |
680ed4a8 | 3140 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, scm_eval_args (x, env, proc))); |
6dbd0af5 | 3141 | case scm_tc7_lsubr: |
680ed4a8 MD |
3142 | RETURN (SCM_SUBRF (proc) (scm_cons2 (t.arg1, |
3143 | arg2, | |
3144 | scm_eval_args (x, env, proc)))); | |
0717dfd8 | 3145 | case scm_tc7_smob: |
68b06924 | 3146 | if (!SCM_SMOB_APPLICABLE_P (proc)) |
0717dfd8 | 3147 | goto badfun; |
68b06924 KN |
3148 | RETURN (SCM_SMOB_APPLY_3 (proc, t.arg1, arg2, |
3149 | scm_eval_args (x, env, proc))); | |
6dbd0af5 MD |
3150 | case scm_tc7_cclo: |
3151 | goto cclon; | |
89efbff4 MD |
3152 | case scm_tc7_pws: |
3153 | proc = SCM_PROCEDURE (proc); | |
002f1a5d MD |
3154 | if (!SCM_CLOSUREP (proc)) |
3155 | goto evap3; | |
3156 | { | |
726d810a | 3157 | SCM formals = SCM_CLOSURE_FORMALS (proc); |
002f1a5d MD |
3158 | if (SCM_NULLP (formals) |
3159 | || (SCM_CONSP (formals) | |
3160 | && (SCM_NULLP (SCM_CDR (formals)) | |
3161 | || (SCM_CONSP (SCM_CDR (formals)) | |
3162 | && scm_badargsp (SCM_CDDR (formals), x))))) | |
3163 | goto umwrongnumargs; | |
3164 | } | |
6dbd0af5 MD |
3165 | case scm_tcs_closures: |
3166 | #ifdef DEVAL | |
b7ff98dd | 3167 | SCM_SET_ARGSREADY (debug); |
6dbd0af5 | 3168 | #endif |
726d810a | 3169 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), |
680ed4a8 MD |
3170 | scm_cons2 (t.arg1, |
3171 | arg2, | |
3172 | scm_eval_args (x, env, proc)), | |
6dbd0af5 MD |
3173 | SCM_ENV (proc)); |
3174 | x = SCM_CODE (proc); | |
5280aaca | 3175 | goto nontoplevel_cdrxbegin; |
0f2d19dd | 3176 | #endif /* DEVAL */ |
86d31dfe | 3177 | case scm_tcs_cons_gloc: /* really structs, not glocs */ |
f3d2630a MD |
3178 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) |
3179 | { | |
3180 | #ifdef DEVAL | |
3181 | arg2 = debug.info->a.args; | |
3182 | #else | |
3183 | arg2 = scm_cons2 (t.arg1, arg2, scm_eval_args (x, env, proc)); | |
3184 | #endif | |
195847fa | 3185 | x = SCM_ENTITY_PROCEDURE (proc); |
f3d2630a MD |
3186 | goto type_dispatch; |
3187 | } | |
3188 | else if (!SCM_I_OPERATORP (proc)) | |
9b07e212 MD |
3189 | goto badfun; |
3190 | else | |
195847fa | 3191 | goto operatorn; |
6dbd0af5 MD |
3192 | case scm_tc7_subr_2: |
3193 | case scm_tc7_subr_1o: | |
3194 | case scm_tc7_subr_2o: | |
3195 | case scm_tc7_subr_0: | |
3196 | case scm_tc7_cxr: | |
3197 | case scm_tc7_subr_1: | |
6dbd0af5 MD |
3198 | goto wrongnumargs; |
3199 | default: | |
3200 | goto badfun; | |
3201 | } | |
0f2d19dd JB |
3202 | } |
3203 | #ifdef DEVAL | |
6dbd0af5 | 3204 | exit: |
b6d75948 | 3205 | if (CHECK_EXIT && SCM_TRAPS_P) |
b7ff98dd | 3206 | if (SCM_EXIT_FRAME_P || (SCM_TRACE_P && SCM_TRACED_FRAME_P (debug))) |
6dbd0af5 | 3207 | { |
b7ff98dd MD |
3208 | SCM_CLEAR_TRACED_FRAME (debug); |
3209 | if (SCM_CHEAPTRAPS_P) | |
c0ab1b8d | 3210 | t.arg1 = scm_make_debugobj (&debug); |
6dbd0af5 MD |
3211 | else |
3212 | { | |
5f144b10 GH |
3213 | int first; |
3214 | SCM val = scm_make_continuation (&first); | |
3215 | ||
3216 | if (first) | |
3217 | t.arg1 = val; | |
3218 | else | |
6dbd0af5 | 3219 | { |
5f144b10 | 3220 | proc = val; |
6dbd0af5 MD |
3221 | goto ret; |
3222 | } | |
3223 | } | |
2f0d1375 | 3224 | scm_ithrow (scm_sym_exit_frame, scm_cons2 (t.arg1, proc, SCM_EOL), 0); |
6dbd0af5 MD |
3225 | } |
3226 | ret: | |
1646d37b | 3227 | scm_last_debug_frame = debug.prev; |
0f2d19dd JB |
3228 | return proc; |
3229 | #endif | |
3230 | } | |
3231 | ||
6dbd0af5 MD |
3232 | |
3233 | /* SECTION: This code is compiled once. | |
3234 | */ | |
3235 | ||
0f2d19dd JB |
3236 | #ifndef DEVAL |
3237 | ||
82a2622a | 3238 | /* This code processes the arguments to apply: |
b145c172 JB |
3239 | |
3240 | (apply PROC ARG1 ... ARGS) | |
3241 | ||
82a2622a JB |
3242 | Given a list (ARG1 ... ARGS), this function conses the ARG1 |
3243 | ... arguments onto the front of ARGS, and returns the resulting | |
3244 | list. Note that ARGS is a list; thus, the argument to this | |
3245 | function is a list whose last element is a list. | |
3246 | ||
3247 | Apply calls this function, and applies PROC to the elements of the | |
b145c172 JB |
3248 | result. apply:nconc2last takes care of building the list of |
3249 | arguments, given (ARG1 ... ARGS). | |
3250 | ||
82a2622a JB |
3251 | Rather than do new consing, apply:nconc2last destroys its argument. |
3252 | On that topic, this code came into my care with the following | |
3253 | beautifully cryptic comment on that topic: "This will only screw | |
3254 | you if you do (scm_apply scm_apply '( ... ))" If you know what | |
3255 | they're referring to, send me a patch to this comment. */ | |
b145c172 | 3256 | |
3b3b36dd | 3257 | SCM_DEFINE (scm_nconc2last, "apply:nconc2last", 1, 0, 0, |
b3f26b14 MG |
3258 | (SCM lst), |
3259 | "Given a list (@var{arg1} @dots{} @var{args}), this function\n" | |
3260 | "conses the @var{arg1} @dots{} arguments onto the front of\n" | |
3261 | "@var{args}, and returns the resulting list. Note that\n" | |
3262 | "@var{args} is a list; thus, the argument to this function is\n" | |
3263 | "a list whose last element is a list.\n" | |
3264 | "Note: Rather than do new consing, @code{apply:nconc2last}\n" | |
3265 | "destroys its argument, so use with care.") | |
1bbd0b84 | 3266 | #define FUNC_NAME s_scm_nconc2last |
0f2d19dd JB |
3267 | { |
3268 | SCM *lloc; | |
c1bfcf60 | 3269 | SCM_VALIDATE_NONEMPTYLIST (1,lst); |
0f2d19dd JB |
3270 | lloc = &lst; |
3271 | while (SCM_NNULLP (SCM_CDR (*lloc))) | |
a23afe53 | 3272 | lloc = SCM_CDRLOC (*lloc); |
1bbd0b84 | 3273 | SCM_ASSERT (scm_ilength (SCM_CAR (*lloc)) >= 0, lst, SCM_ARG1, FUNC_NAME); |
0f2d19dd JB |
3274 | *lloc = SCM_CAR (*lloc); |
3275 | return lst; | |
3276 | } | |
1bbd0b84 | 3277 | #undef FUNC_NAME |
0f2d19dd JB |
3278 | |
3279 | #endif /* !DEVAL */ | |
3280 | ||
6dbd0af5 MD |
3281 | |
3282 | /* SECTION: When DEVAL is defined this code yields scm_dapply. | |
3283 | * It is compiled twice. | |
3284 | */ | |
3285 | ||
0f2d19dd | 3286 | #if 0 |
1cc91f1b | 3287 | |
0f2d19dd | 3288 | SCM |
6e8d25a6 | 3289 | scm_apply (SCM proc, SCM arg1, SCM args) |
0f2d19dd JB |
3290 | {} |
3291 | #endif | |
3292 | ||
3293 | #if 0 | |
1cc91f1b | 3294 | |
0f2d19dd | 3295 | SCM |
6e8d25a6 GB |
3296 | scm_dapply (SCM proc, SCM arg1, SCM args) |
3297 | { /* empty */ } | |
0f2d19dd JB |
3298 | #endif |
3299 | ||
1cc91f1b | 3300 | |
82a2622a JB |
3301 | /* Apply a function to a list of arguments. |
3302 | ||
3303 | This function is exported to the Scheme level as taking two | |
3304 | required arguments and a tail argument, as if it were: | |
3305 | (lambda (proc arg1 . args) ...) | |
3306 | Thus, if you just have a list of arguments to pass to a procedure, | |
3307 | pass the list as ARG1, and '() for ARGS. If you have some fixed | |
3308 | args, pass the first as ARG1, then cons any remaining fixed args | |
3309 | onto the front of your argument list, and pass that as ARGS. */ | |
3310 | ||
0f2d19dd | 3311 | SCM |
1bbd0b84 | 3312 | SCM_APPLY (SCM proc, SCM arg1, SCM args) |
0f2d19dd JB |
3313 | { |
3314 | #ifdef DEBUG_EXTENSIONS | |
3315 | #ifdef DEVAL | |
6dbd0af5 | 3316 | scm_debug_frame debug; |
c0ab1b8d | 3317 | scm_debug_info debug_vect_body; |
1646d37b | 3318 | debug.prev = scm_last_debug_frame; |
b7ff98dd | 3319 | debug.status = SCM_APPLYFRAME; |
c0ab1b8d | 3320 | debug.vect = &debug_vect_body; |
6dbd0af5 MD |
3321 | debug.vect[0].a.proc = proc; |
3322 | debug.vect[0].a.args = SCM_EOL; | |
1646d37b | 3323 | scm_last_debug_frame = &debug; |
0f2d19dd | 3324 | #else |
b7ff98dd | 3325 | if (SCM_DEBUGGINGP) |
0f2d19dd JB |
3326 | return scm_dapply (proc, arg1, args); |
3327 | #endif | |
3328 | #endif | |
3329 | ||
3330 | SCM_ASRTGO (SCM_NIMP (proc), badproc); | |
82a2622a JB |
3331 | |
3332 | /* If ARGS is the empty list, then we're calling apply with only two | |
3333 | arguments --- ARG1 is the list of arguments for PROC. Whatever | |
3334 | the case, futz with things so that ARG1 is the first argument to | |
3335 | give to PROC (or SCM_UNDEFINED if no args), and ARGS contains the | |
30000774 JB |
3336 | rest. |
3337 | ||
3338 | Setting the debug apply frame args this way is pretty messy. | |
3339 | Perhaps we should store arg1 and args directly in the frame as | |
3340 | received, and let scm_frame_arguments unpack them, because that's | |
3341 | a relatively rare operation. This works for now; if the Guile | |
3342 | developer archives are still around, see Mikael's post of | |
3343 | 11-Apr-97. */ | |
0f2d19dd JB |
3344 | if (SCM_NULLP (args)) |
3345 | { | |
3346 | if (SCM_NULLP (arg1)) | |
30000774 JB |
3347 | { |
3348 | arg1 = SCM_UNDEFINED; | |
3349 | #ifdef DEVAL | |
3350 | debug.vect[0].a.args = SCM_EOL; | |
3351 | #endif | |
3352 | } | |
0f2d19dd JB |
3353 | else |
3354 | { | |
30000774 JB |
3355 | #ifdef DEVAL |
3356 | debug.vect[0].a.args = arg1; | |
3357 | #endif | |
0f2d19dd JB |
3358 | args = SCM_CDR (arg1); |
3359 | arg1 = SCM_CAR (arg1); | |
3360 | } | |
3361 | } | |
3362 | else | |
3363 | { | |
0f2d19dd | 3364 | args = scm_nconc2last (args); |
30000774 JB |
3365 | #ifdef DEVAL |
3366 | debug.vect[0].a.args = scm_cons (arg1, args); | |
3367 | #endif | |
0f2d19dd | 3368 | } |
0f2d19dd | 3369 | #ifdef DEVAL |
b6d75948 | 3370 | if (SCM_ENTER_FRAME_P && SCM_TRAPS_P) |
6dbd0af5 MD |
3371 | { |
3372 | SCM tmp; | |
b7ff98dd | 3373 | if (SCM_CHEAPTRAPS_P) |
c0ab1b8d | 3374 | tmp = scm_make_debugobj (&debug); |
6dbd0af5 MD |
3375 | else |
3376 | { | |
5f144b10 GH |
3377 | int first; |
3378 | ||
3379 | tmp = scm_make_continuation (&first); | |
3380 | if (!first) | |
6dbd0af5 MD |
3381 | goto entap; |
3382 | } | |
2f0d1375 | 3383 | scm_ithrow (scm_sym_enter_frame, scm_cons (tmp, SCM_EOL), 0); |
6dbd0af5 MD |
3384 | } |
3385 | entap: | |
3386 | ENTER_APPLY; | |
3387 | #endif | |
6dbd0af5 | 3388 | tail: |
0f2d19dd JB |
3389 | switch (SCM_TYP7 (proc)) |
3390 | { | |
3391 | case scm_tc7_subr_2o: | |
3392 | args = SCM_NULLP (args) ? SCM_UNDEFINED : SCM_CAR (args); | |
3393 | RETURN (SCM_SUBRF (proc) (arg1, args)) | |
3394 | case scm_tc7_subr_2: | |
269861c7 MD |
3395 | SCM_ASRTGO (SCM_NNULLP (args) && SCM_NULLP (SCM_CDR (args)), |
3396 | wrongnumargs); | |
0f2d19dd JB |
3397 | args = SCM_CAR (args); |
3398 | RETURN (SCM_SUBRF (proc) (arg1, args)) | |
3399 | case scm_tc7_subr_0: | |
3400 | SCM_ASRTGO (SCM_UNBNDP (arg1), wrongnumargs); | |
3401 | RETURN (SCM_SUBRF (proc) ()) | |
3402 | case scm_tc7_subr_1: | |
41ee56dd | 3403 | SCM_ASRTGO (!SCM_UNBNDP (arg1), wrongnumargs); |
0f2d19dd JB |
3404 | case scm_tc7_subr_1o: |
3405 | SCM_ASRTGO (SCM_NULLP (args), wrongnumargs); | |
3406 | RETURN (SCM_SUBRF (proc) (arg1)) | |
3407 | case scm_tc7_cxr: | |
90cd76d9 | 3408 | SCM_ASRTGO (!SCM_UNBNDP (arg1) && SCM_NULLP (args), wrongnumargs); |
0f2d19dd JB |
3409 | if (SCM_SUBRF (proc)) |
3410 | { | |
6dbd0af5 MD |
3411 | if (SCM_INUMP (arg1)) |
3412 | { | |
f8de44c1 | 3413 | RETURN (scm_make_real (SCM_DSUBRF (proc) ((double) SCM_INUM (arg1)))); |
6dbd0af5 | 3414 | } |
0f2d19dd | 3415 | SCM_ASRTGO (SCM_NIMP (arg1), floerr); |
6dbd0af5 MD |
3416 | if (SCM_REALP (arg1)) |
3417 | { | |
eb42e2f0 | 3418 | RETURN (scm_make_real (SCM_DSUBRF (proc) (SCM_REAL_VALUE (arg1)))); |
6dbd0af5 | 3419 | } |
0f2d19dd | 3420 | #ifdef SCM_BIGDIG |
26d5b9b4 | 3421 | if (SCM_BIGP (arg1)) |
f8de44c1 | 3422 | RETURN (scm_make_real (SCM_DSUBRF (proc) (scm_big2dbl (arg1)))) |
0f2d19dd JB |
3423 | #endif |
3424 | floerr: | |
9de33deb | 3425 | SCM_WTA_DISPATCH_1 (*SCM_SUBR_GENERIC (proc), arg1, |
3db4adfc | 3426 | SCM_ARG1, SCM_SYMBOL_CHARS (SCM_SNAME (proc))); |
0f2d19dd | 3427 | } |
3201d763 | 3428 | proc = SCM_SNAME (proc); |
0f2d19dd | 3429 | { |
b5c2579a | 3430 | char *chrs = SCM_SYMBOL_CHARS (proc) + SCM_SYMBOL_LENGTH (proc) - 1; |
0f2d19dd JB |
3431 | while ('c' != *--chrs) |
3432 | { | |
0c95b57d | 3433 | SCM_ASSERT (SCM_CONSP (arg1), |
3db4adfc | 3434 | arg1, SCM_ARG1, SCM_SYMBOL_CHARS (proc)); |
0f2d19dd JB |
3435 | arg1 = ('a' == *chrs) ? SCM_CAR (arg1) : SCM_CDR (arg1); |
3436 | } | |
3437 | RETURN (arg1) | |
3438 | } | |
3439 | case scm_tc7_subr_3: | |
f1e06a96 MD |
3440 | SCM_ASRTGO (SCM_NNULLP (args) |
3441 | && SCM_NNULLP (SCM_CDR (args)) | |
3442 | && SCM_NULLP (SCM_CDDR (args)), | |
3443 | wrongnumargs); | |
0f2d19dd JB |
3444 | RETURN (SCM_SUBRF (proc) (arg1, SCM_CAR (args), SCM_CAR (SCM_CDR (args)))) |
3445 | case scm_tc7_lsubr: | |
3446 | #ifdef DEVAL | |
6dbd0af5 | 3447 | RETURN (SCM_SUBRF (proc) (SCM_UNBNDP (arg1) ? SCM_EOL : debug.vect[0].a.args)) |
0f2d19dd JB |
3448 | #else |
3449 | RETURN (SCM_SUBRF (proc) (SCM_UNBNDP (arg1) ? SCM_EOL : scm_cons (arg1, args))) | |
3450 | #endif | |
3451 | case scm_tc7_lsubr_2: | |
0c95b57d | 3452 | SCM_ASRTGO (SCM_CONSP (args), wrongnumargs); |
0f2d19dd JB |
3453 | RETURN (SCM_SUBRF (proc) (arg1, SCM_CAR (args), SCM_CDR (args))) |
3454 | case scm_tc7_asubr: | |
3455 | if (SCM_NULLP (args)) | |
3456 | RETURN (SCM_SUBRF (proc) (arg1, SCM_UNDEFINED)) | |
3457 | while (SCM_NIMP (args)) | |
3458 | { | |
3459 | SCM_ASSERT (SCM_CONSP (args), args, SCM_ARG2, "apply"); | |
3460 | arg1 = SCM_SUBRF (proc) (arg1, SCM_CAR (args)); | |
3461 | args = SCM_CDR (args); | |
3462 | } | |
3463 | RETURN (arg1); | |
3464 | case scm_tc7_rpsubr: | |
3465 | if (SCM_NULLP (args)) | |
3466 | RETURN (SCM_BOOL_T); | |
3467 | while (SCM_NIMP (args)) | |
3468 | { | |
3469 | SCM_ASSERT (SCM_CONSP (args), args, SCM_ARG2, "apply"); | |
3470 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg1, SCM_CAR (args)))) | |
3471 | RETURN (SCM_BOOL_F); | |
3472 | arg1 = SCM_CAR (args); | |
3473 | args = SCM_CDR (args); | |
3474 | } | |
3475 | RETURN (SCM_BOOL_T); | |
3476 | case scm_tcs_closures: | |
3477 | #ifdef DEVAL | |
6dbd0af5 | 3478 | arg1 = (SCM_UNBNDP (arg1) ? SCM_EOL : debug.vect[0].a.args); |
0f2d19dd JB |
3479 | #else |
3480 | arg1 = (SCM_UNBNDP (arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
3481 | #endif | |
cf7c17e9 | 3482 | #ifndef SCM_RECKLESS |
726d810a | 3483 | if (scm_badargsp (SCM_CLOSURE_FORMALS (proc), arg1)) |
0f2d19dd JB |
3484 | goto wrongnumargs; |
3485 | #endif | |
1609038c MD |
3486 | |
3487 | /* Copy argument list */ | |
3488 | if (SCM_IMP (arg1)) | |
3489 | args = arg1; | |
3490 | else | |
3491 | { | |
3492 | SCM tl = args = scm_cons (SCM_CAR (arg1), SCM_UNSPECIFIED); | |
cabe682c | 3493 | while (arg1 = SCM_CDR (arg1), SCM_CONSP (arg1)) |
1609038c MD |
3494 | { |
3495 | SCM_SETCDR (tl, scm_cons (SCM_CAR (arg1), | |
3496 | SCM_UNSPECIFIED)); | |
3497 | tl = SCM_CDR (tl); | |
3498 | } | |
3499 | SCM_SETCDR (tl, arg1); | |
3500 | } | |
3501 | ||
726d810a | 3502 | args = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), args, SCM_ENV (proc)); |
2ddb0920 | 3503 | proc = SCM_CDR (SCM_CODE (proc)); |
e791c18f MD |
3504 | again: |
3505 | arg1 = proc; | |
3506 | while (SCM_NNULLP (arg1 = SCM_CDR (arg1))) | |
2ddb0920 MD |
3507 | { |
3508 | if (SCM_IMP (SCM_CAR (proc))) | |
3509 | { | |
3510 | if (SCM_ISYMP (SCM_CAR (proc))) | |
3511 | { | |
3512 | proc = scm_m_expand_body (proc, args); | |
e791c18f | 3513 | goto again; |
2ddb0920 | 3514 | } |
5280aaca MV |
3515 | else |
3516 | SCM_EVALIM2 (SCM_CAR (proc)); | |
2ddb0920 MD |
3517 | } |
3518 | else | |
e791c18f MD |
3519 | SCM_CEVAL (SCM_CAR (proc), args); |
3520 | proc = arg1; | |
2ddb0920 | 3521 | } |
e791c18f | 3522 | RETURN (EVALCAR (proc, args)); |
0717dfd8 | 3523 | case scm_tc7_smob: |
68b06924 | 3524 | if (!SCM_SMOB_APPLICABLE_P (proc)) |
0717dfd8 | 3525 | goto badproc; |
afa38f6e | 3526 | if (SCM_UNBNDP (arg1)) |
68b06924 | 3527 | RETURN (SCM_SMOB_APPLY_0 (proc)) |
afa38f6e | 3528 | else if (SCM_NULLP (args)) |
68b06924 | 3529 | RETURN (SCM_SMOB_APPLY_1 (proc, arg1)) |
0717dfd8 | 3530 | else if (SCM_NULLP (SCM_CDR (args))) |
68b06924 | 3531 | RETURN (SCM_SMOB_APPLY_2 (proc, arg1, SCM_CAR (args))) |
0717dfd8 | 3532 | else |
68b06924 | 3533 | RETURN (SCM_SMOB_APPLY_3 (proc, arg1, SCM_CAR (args), SCM_CDR (args))); |
0f2d19dd JB |
3534 | case scm_tc7_cclo: |
3535 | #ifdef DEVAL | |
6dbd0af5 MD |
3536 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : debug.vect[0].a.args); |
3537 | arg1 = proc; | |
3538 | proc = SCM_CCLO_SUBR (proc); | |
3539 | debug.vect[0].a.proc = proc; | |
3540 | debug.vect[0].a.args = scm_cons (arg1, args); | |
0f2d19dd JB |
3541 | #else |
3542 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
0f2d19dd JB |
3543 | arg1 = proc; |
3544 | proc = SCM_CCLO_SUBR (proc); | |
6dbd0af5 | 3545 | #endif |
0f2d19dd | 3546 | goto tail; |
89efbff4 MD |
3547 | case scm_tc7_pws: |
3548 | proc = SCM_PROCEDURE (proc); | |
3549 | #ifdef DEVAL | |
3550 | debug.vect[0].a.proc = proc; | |
3551 | #endif | |
3552 | goto tail; | |
86d31dfe | 3553 | case scm_tcs_cons_gloc: /* really structs, not glocs */ |
f3d2630a MD |
3554 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) |
3555 | { | |
3556 | #ifdef DEVAL | |
3557 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : debug.vect[0].a.args); | |
3558 | #else | |
3559 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
3560 | #endif | |
195847fa | 3561 | RETURN (scm_apply_generic (proc, args)); |
f3d2630a MD |
3562 | } |
3563 | else if (!SCM_I_OPERATORP (proc)) | |
9b07e212 MD |
3564 | goto badproc; |
3565 | else | |
da7f71d7 MD |
3566 | { |
3567 | #ifdef DEVAL | |
3568 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : debug.vect[0].a.args); | |
3569 | #else | |
3570 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
3571 | #endif | |
3572 | arg1 = proc; | |
195847fa MD |
3573 | proc = (SCM_I_ENTITYP (proc) |
3574 | ? SCM_ENTITY_PROCEDURE (proc) | |
3575 | : SCM_OPERATOR_PROCEDURE (proc)); | |
da7f71d7 MD |
3576 | #ifdef DEVAL |
3577 | debug.vect[0].a.proc = proc; | |
3578 | debug.vect[0].a.args = scm_cons (arg1, args); | |
3579 | #endif | |
195847fa MD |
3580 | if (SCM_NIMP (proc)) |
3581 | goto tail; | |
3582 | else | |
3583 | goto badproc; | |
da7f71d7 | 3584 | } |
0f2d19dd | 3585 | wrongnumargs: |
f5bf2977 | 3586 | scm_wrong_num_args (proc); |
0f2d19dd JB |
3587 | default: |
3588 | badproc: | |
db4b4ca6 | 3589 | scm_wrong_type_arg ("apply", SCM_ARG1, proc); |
0f2d19dd JB |
3590 | RETURN (arg1); |
3591 | } | |
3592 | #ifdef DEVAL | |
6dbd0af5 | 3593 | exit: |
b6d75948 | 3594 | if (CHECK_EXIT && SCM_TRAPS_P) |
b7ff98dd | 3595 | if (SCM_EXIT_FRAME_P || (SCM_TRACE_P && SCM_TRACED_FRAME_P (debug))) |
6dbd0af5 | 3596 | { |
b7ff98dd MD |
3597 | SCM_CLEAR_TRACED_FRAME (debug); |
3598 | if (SCM_CHEAPTRAPS_P) | |
c0ab1b8d | 3599 | arg1 = scm_make_debugobj (&debug); |
6dbd0af5 MD |
3600 | else |
3601 | { | |
5f144b10 GH |
3602 | int first; |
3603 | SCM val = scm_make_continuation (&first); | |
3604 | ||
3605 | if (first) | |
3606 | arg1 = val; | |
3607 | else | |
6dbd0af5 | 3608 | { |
5f144b10 | 3609 | proc = val; |
6dbd0af5 MD |
3610 | goto ret; |
3611 | } | |
3612 | } | |
2f0d1375 | 3613 | scm_ithrow (scm_sym_exit_frame, scm_cons2 (arg1, proc, SCM_EOL), 0); |
6dbd0af5 MD |
3614 | } |
3615 | ret: | |
1646d37b | 3616 | scm_last_debug_frame = debug.prev; |
0f2d19dd JB |
3617 | return proc; |
3618 | #endif | |
3619 | } | |
3620 | ||
6dbd0af5 MD |
3621 | |
3622 | /* SECTION: The rest of this file is only read once. | |
3623 | */ | |
3624 | ||
0f2d19dd JB |
3625 | #ifndef DEVAL |
3626 | ||
d9c393f5 JB |
3627 | /* Typechecking for multi-argument MAP and FOR-EACH. |
3628 | ||
47c3f06d | 3629 | Verify that each element of the vector ARGV, except for the first, |
d9c393f5 | 3630 | is a proper list whose length is LEN. Attribute errors to WHO, |
47c3f06d | 3631 | and claim that the i'th element of ARGV is WHO's i+2'th argument. */ |
d9c393f5 | 3632 | static inline void |
47c3f06d MD |
3633 | check_map_args (SCM argv, |
3634 | long len, | |
3635 | SCM gf, | |
3636 | SCM proc, | |
3637 | SCM args, | |
3638 | const char *who) | |
d9c393f5 | 3639 | { |
47c3f06d | 3640 | SCM *ve = SCM_VELTS (argv); |
d9c393f5 JB |
3641 | int i; |
3642 | ||
b5c2579a | 3643 | for (i = SCM_VECTOR_LENGTH (argv) - 1; i >= 1; i--) |
d9c393f5 JB |
3644 | { |
3645 | int elt_len = scm_ilength (ve[i]); | |
3646 | ||
3647 | if (elt_len < 0) | |
47c3f06d MD |
3648 | { |
3649 | if (gf) | |
3650 | scm_apply_generic (gf, scm_cons (proc, args)); | |
3651 | else | |
3652 | scm_wrong_type_arg (who, i + 2, ve[i]); | |
3653 | } | |
d9c393f5 JB |
3654 | |
3655 | if (elt_len != len) | |
3656 | scm_out_of_range (who, ve[i]); | |
3657 | } | |
3658 | ||
5d2b97cd | 3659 | scm_remember_upto_here_1 (argv); |
d9c393f5 JB |
3660 | } |
3661 | ||
3662 | ||
47c3f06d | 3663 | SCM_GPROC (s_map, "map", 2, 0, 1, scm_map, g_map); |
1cc91f1b | 3664 | |
368bf056 MD |
3665 | /* Note: Currently, scm_map applies PROC to the argument list(s) |
3666 | sequentially, starting with the first element(s). This is used in | |
8878f040 | 3667 | evalext.c where the Scheme procedure `map-in-order', which guarantees |
368bf056 | 3668 | sequential behaviour, is implemented using scm_map. If the |
8878f040 | 3669 | behaviour changes, we need to update `map-in-order'. |
368bf056 MD |
3670 | */ |
3671 | ||
0f2d19dd | 3672 | SCM |
1bbd0b84 | 3673 | scm_map (SCM proc, SCM arg1, SCM args) |
af45e3b0 | 3674 | #define FUNC_NAME s_map |
0f2d19dd | 3675 | { |
d9c393f5 | 3676 | long i, len; |
0f2d19dd JB |
3677 | SCM res = SCM_EOL; |
3678 | SCM *pres = &res; | |
3679 | SCM *ve = &args; /* Keep args from being optimized away. */ | |
3680 | ||
d9c393f5 | 3681 | len = scm_ilength (arg1); |
47c3f06d MD |
3682 | SCM_GASSERTn (len >= 0, |
3683 | g_map, scm_cons2 (proc, arg1, args), SCM_ARG2, s_map); | |
af45e3b0 | 3684 | SCM_VALIDATE_REST_ARGUMENT (args); |
0f2d19dd JB |
3685 | if (SCM_NULLP (args)) |
3686 | { | |
3687 | while (SCM_NIMP (arg1)) | |
3688 | { | |
47c3f06d MD |
3689 | *pres = scm_cons (scm_apply (proc, SCM_CAR (arg1), scm_listofnull), |
3690 | SCM_EOL); | |
a23afe53 | 3691 | pres = SCM_CDRLOC (*pres); |
0f2d19dd JB |
3692 | arg1 = SCM_CDR (arg1); |
3693 | } | |
3694 | return res; | |
3695 | } | |
47c3f06d | 3696 | args = scm_vector (arg1 = scm_cons (arg1, args)); |
0f2d19dd | 3697 | ve = SCM_VELTS (args); |
cf7c17e9 | 3698 | #ifndef SCM_RECKLESS |
47c3f06d | 3699 | check_map_args (args, len, g_map, proc, arg1, s_map); |
0f2d19dd JB |
3700 | #endif |
3701 | while (1) | |
3702 | { | |
3703 | arg1 = SCM_EOL; | |
b5c2579a | 3704 | for (i = SCM_VECTOR_LENGTH (args) - 1; i >= 0; i--) |
0f2d19dd | 3705 | { |
d9c393f5 JB |
3706 | if (SCM_IMP (ve[i])) |
3707 | return res; | |
0f2d19dd JB |
3708 | arg1 = scm_cons (SCM_CAR (ve[i]), arg1); |
3709 | ve[i] = SCM_CDR (ve[i]); | |
3710 | } | |
3711 | *pres = scm_cons (scm_apply (proc, arg1, SCM_EOL), SCM_EOL); | |
a23afe53 | 3712 | pres = SCM_CDRLOC (*pres); |
0f2d19dd JB |
3713 | } |
3714 | } | |
af45e3b0 | 3715 | #undef FUNC_NAME |
0f2d19dd JB |
3716 | |
3717 | ||
47c3f06d | 3718 | SCM_GPROC (s_for_each, "for-each", 2, 0, 1, scm_for_each, g_for_each); |
1cc91f1b | 3719 | |
0f2d19dd | 3720 | SCM |
1bbd0b84 | 3721 | scm_for_each (SCM proc, SCM arg1, SCM args) |
af45e3b0 | 3722 | #define FUNC_NAME s_for_each |
0f2d19dd JB |
3723 | { |
3724 | SCM *ve = &args; /* Keep args from being optimized away. */ | |
d9c393f5 | 3725 | long i, len; |
d9c393f5 | 3726 | len = scm_ilength (arg1); |
47c3f06d MD |
3727 | SCM_GASSERTn (len >= 0, g_for_each, scm_cons2 (proc, arg1, args), |
3728 | SCM_ARG2, s_for_each); | |
af45e3b0 | 3729 | SCM_VALIDATE_REST_ARGUMENT (args); |
0f2d19dd JB |
3730 | if SCM_NULLP (args) |
3731 | { | |
3732 | while SCM_NIMP (arg1) | |
3733 | { | |
0f2d19dd JB |
3734 | scm_apply (proc, SCM_CAR (arg1), scm_listofnull); |
3735 | arg1 = SCM_CDR (arg1); | |
3736 | } | |
3737 | return SCM_UNSPECIFIED; | |
3738 | } | |
47c3f06d | 3739 | args = scm_vector (arg1 = scm_cons (arg1, args)); |
0f2d19dd | 3740 | ve = SCM_VELTS (args); |
cf7c17e9 | 3741 | #ifndef SCM_RECKLESS |
47c3f06d | 3742 | check_map_args (args, len, g_for_each, proc, arg1, s_for_each); |
0f2d19dd JB |
3743 | #endif |
3744 | while (1) | |
3745 | { | |
3746 | arg1 = SCM_EOL; | |
b5c2579a | 3747 | for (i = SCM_VECTOR_LENGTH (args) - 1; i >= 0; i--) |
0f2d19dd JB |
3748 | { |
3749 | if SCM_IMP | |
3750 | (ve[i]) return SCM_UNSPECIFIED; | |
3751 | arg1 = scm_cons (SCM_CAR (ve[i]), arg1); | |
3752 | ve[i] = SCM_CDR (ve[i]); | |
3753 | } | |
3754 | scm_apply (proc, arg1, SCM_EOL); | |
3755 | } | |
3756 | } | |
af45e3b0 | 3757 | #undef FUNC_NAME |
0f2d19dd | 3758 | |
1cc91f1b | 3759 | |
0f2d19dd | 3760 | SCM |
6e8d25a6 | 3761 | scm_closure (SCM code, SCM env) |
0f2d19dd JB |
3762 | { |
3763 | register SCM z; | |
86d31dfe | 3764 | |
0f2d19dd JB |
3765 | SCM_NEWCELL (z); |
3766 | SCM_SETCODE (z, code); | |
a23afe53 | 3767 | SCM_SETENV (z, env); |
0f2d19dd JB |
3768 | return z; |
3769 | } | |
3770 | ||
3771 | ||
e841c3e0 | 3772 | scm_bits_t scm_tc16_promise; |
1cc91f1b | 3773 | |
0f2d19dd | 3774 | SCM |
6e8d25a6 | 3775 | scm_makprom (SCM code) |
0f2d19dd | 3776 | { |
cf498326 | 3777 | SCM_RETURN_NEWSMOB (scm_tc16_promise, SCM_UNPACK (code)); |
0f2d19dd JB |
3778 | } |
3779 | ||
3780 | ||
1cc91f1b | 3781 | |
0f2d19dd | 3782 | static int |
e841c3e0 | 3783 | promise_print (SCM exp, SCM port, scm_print_state *pstate) |
0f2d19dd | 3784 | { |
19402679 | 3785 | int writingp = SCM_WRITINGP (pstate); |
b7f3516f | 3786 | scm_puts ("#<promise ", port); |
19402679 | 3787 | SCM_SET_WRITINGP (pstate, 1); |
22a52da1 | 3788 | scm_iprin1 (SCM_CELL_WORD_1 (exp), port, pstate); |
19402679 | 3789 | SCM_SET_WRITINGP (pstate, writingp); |
b7f3516f | 3790 | scm_putc ('>', port); |
0f2d19dd JB |
3791 | return !0; |
3792 | } | |
3793 | ||
3794 | ||
3b3b36dd | 3795 | SCM_DEFINE (scm_force, "force", 1, 0, 0, |
67e8151b MG |
3796 | (SCM x), |
3797 | "If the promise @var{x} has not been computed yet, compute and\n" | |
3798 | "return @var{x}, otherwise just return the previously computed\n" | |
3799 | "value.") | |
1bbd0b84 | 3800 | #define FUNC_NAME s_scm_force |
0f2d19dd | 3801 | { |
445f675c DH |
3802 | SCM_VALIDATE_SMOB (1, x, promise); |
3803 | if (!((1L << 16) & SCM_CELL_WORD_0 (x))) | |
0f2d19dd | 3804 | { |
445f675c DH |
3805 | SCM ans = scm_apply (SCM_CELL_OBJECT_1 (x), SCM_EOL, SCM_EOL); |
3806 | if (!((1L << 16) & SCM_CELL_WORD_0 (x))) | |
0f2d19dd JB |
3807 | { |
3808 | SCM_DEFER_INTS; | |
445f675c DH |
3809 | SCM_SET_CELL_OBJECT_1 (x, ans); |
3810 | SCM_SET_CELL_WORD_0 (x, SCM_CELL_WORD_0 (x) | (1L << 16)); | |
0f2d19dd JB |
3811 | SCM_ALLOW_INTS; |
3812 | } | |
3813 | } | |
445f675c | 3814 | return SCM_CELL_OBJECT_1 (x); |
0f2d19dd | 3815 | } |
1bbd0b84 | 3816 | #undef FUNC_NAME |
0f2d19dd | 3817 | |
445f675c | 3818 | |
a1ec6916 | 3819 | SCM_DEFINE (scm_promise_p, "promise?", 1, 0, 0, |
67e8151b | 3820 | (SCM obj), |
b380b885 | 3821 | "Return true if @var{obj} is a promise, i.e. a delayed computation\n" |
7a095584 | 3822 | "(@pxref{Delayed evaluation,,,r5rs.info,The Revised^5 Report on Scheme}).") |
1bbd0b84 | 3823 | #define FUNC_NAME s_scm_promise_p |
0f2d19dd | 3824 | { |
67e8151b | 3825 | return SCM_BOOL (SCM_TYP16_PREDICATE (scm_tc16_promise, obj)); |
0f2d19dd | 3826 | } |
1bbd0b84 | 3827 | #undef FUNC_NAME |
0f2d19dd | 3828 | |
445f675c | 3829 | |
a1ec6916 | 3830 | SCM_DEFINE (scm_cons_source, "cons-source", 3, 0, 0, |
1bbd0b84 | 3831 | (SCM xorig, SCM x, SCM y), |
11768c04 NJ |
3832 | "Create and return a new pair whose car and cdr are @var{x} and @var{y}.\n" |
3833 | "Any source properties associated with @var{xorig} are also associated\n" | |
3834 | "with the new pair.") | |
1bbd0b84 | 3835 | #define FUNC_NAME s_scm_cons_source |
26d5b9b4 MD |
3836 | { |
3837 | SCM p, z; | |
3838 | SCM_NEWCELL (z); | |
445f675c DH |
3839 | SCM_SET_CELL_OBJECT_0 (z, x); |
3840 | SCM_SET_CELL_OBJECT_1 (z, y); | |
26d5b9b4 MD |
3841 | /* Copy source properties possibly associated with xorig. */ |
3842 | p = scm_whash_lookup (scm_source_whash, xorig); | |
445f675c | 3843 | if (!SCM_IMP (p)) |
26d5b9b4 MD |
3844 | scm_whash_insert (scm_source_whash, z, p); |
3845 | return z; | |
3846 | } | |
1bbd0b84 | 3847 | #undef FUNC_NAME |
26d5b9b4 | 3848 | |
445f675c | 3849 | |
a1ec6916 | 3850 | SCM_DEFINE (scm_copy_tree, "copy-tree", 1, 0, 0, |
1bbd0b84 | 3851 | (SCM obj), |
b380b885 MD |
3852 | "Recursively copy the data tree that is bound to @var{obj}, and return a\n" |
3853 | "pointer to the new data structure. @code{copy-tree} recurses down the\n" | |
3854 | "contents of both pairs and vectors (since both cons cells and vector\n" | |
3855 | "cells may point to arbitrary objects), and stops recursing when it hits\n" | |
3856 | "any other object.") | |
1bbd0b84 | 3857 | #define FUNC_NAME s_scm_copy_tree |
0f2d19dd JB |
3858 | { |
3859 | SCM ans, tl; | |
26d5b9b4 | 3860 | if (SCM_IMP (obj)) |
ff467021 | 3861 | return obj; |
3910272e MD |
3862 | if (SCM_VECTORP (obj)) |
3863 | { | |
b5c2579a | 3864 | scm_sizet i = SCM_VECTOR_LENGTH (obj); |
00ffa0e7 | 3865 | ans = scm_c_make_vector (i, SCM_UNSPECIFIED); |
3910272e MD |
3866 | while (i--) |
3867 | SCM_VELTS (ans)[i] = scm_copy_tree (SCM_VELTS (obj)[i]); | |
3868 | return ans; | |
3869 | } | |
ff467021 | 3870 | if (SCM_NCONSP (obj)) |
0f2d19dd | 3871 | return obj; |
26d5b9b4 MD |
3872 | ans = tl = scm_cons_source (obj, |
3873 | scm_copy_tree (SCM_CAR (obj)), | |
3874 | SCM_UNSPECIFIED); | |
cabe682c | 3875 | while (obj = SCM_CDR (obj), SCM_CONSP (obj)) |
a23afe53 MD |
3876 | { |
3877 | SCM_SETCDR (tl, scm_cons (scm_copy_tree (SCM_CAR (obj)), | |
3878 | SCM_UNSPECIFIED)); | |
3879 | tl = SCM_CDR (tl); | |
3880 | } | |
3881 | SCM_SETCDR (tl, obj); | |
0f2d19dd JB |
3882 | return ans; |
3883 | } | |
1bbd0b84 | 3884 | #undef FUNC_NAME |
0f2d19dd | 3885 | |
1cc91f1b | 3886 | |
4163eb72 MV |
3887 | /* We have three levels of EVAL here: |
3888 | ||
3889 | - scm_i_eval (exp, env) | |
3890 | ||
3891 | evaluates EXP in environment ENV. ENV is a lexical environment | |
3892 | structure as used by the actual tree code evaluator. When ENV is | |
3893 | a top-level environment, then changes to the current module are | |
a513ead3 | 3894 | tracked by updating ENV so that it continues to be in sync with |
4163eb72 MV |
3895 | the current module. |
3896 | ||
3897 | - scm_primitive_eval (exp) | |
3898 | ||
3899 | evaluates EXP in the top-level environment as determined by the | |
3900 | current module. This is done by constructing a suitable | |
3901 | environment and calling scm_i_eval. Thus, changes to the | |
3902 | top-level module are tracked normally. | |
3903 | ||
3904 | - scm_eval (exp, mod) | |
3905 | ||
a513ead3 | 3906 | evaluates EXP while MOD is the current module. This is done by |
4163eb72 MV |
3907 | setting the current module to MOD, invoking scm_primitive_eval on |
3908 | EXP, and then restoring the current module to the value it had | |
3909 | previously. That is, while EXP is evaluated, changes to the | |
3910 | current module are tracked, but these changes do not persist when | |
3911 | scm_eval returns. | |
3912 | ||
3913 | For each level of evals, there are two variants, distinguished by a | |
3914 | _x suffix: the ordinary variant does not modify EXP while the _x | |
3915 | variant can destructively modify EXP into something completely | |
3916 | unintelligible. A Scheme data structure passed as EXP to one of the | |
3917 | _x variants should not ever be used again for anything. So when in | |
3918 | doubt, use the ordinary variant. | |
3919 | ||
3920 | */ | |
3921 | ||
0f2d19dd | 3922 | SCM |
68d8be66 | 3923 | scm_i_eval_x (SCM exp, SCM env) |
0f2d19dd | 3924 | { |
68d8be66 | 3925 | return SCM_XEVAL (exp, env); |
0f2d19dd JB |
3926 | } |
3927 | ||
68d8be66 MD |
3928 | SCM |
3929 | scm_i_eval (SCM exp, SCM env) | |
3930 | { | |
26fb6390 | 3931 | exp = scm_copy_tree (exp); |
e37a4fba | 3932 | return SCM_XEVAL (exp, env); |
68d8be66 MD |
3933 | } |
3934 | ||
3935 | SCM | |
4163eb72 | 3936 | scm_primitive_eval_x (SCM exp) |
0f2d19dd | 3937 | { |
a513ead3 | 3938 | SCM env; |
bcdab802 | 3939 | SCM transformer = scm_current_module_transformer (); |
a513ead3 MV |
3940 | if (SCM_NIMP (transformer)) |
3941 | exp = scm_apply (transformer, exp, scm_listofnull); | |
3942 | env = scm_top_level_env (scm_current_module_lookup_closure ()); | |
4163eb72 | 3943 | return scm_i_eval_x (exp, env); |
0f2d19dd JB |
3944 | } |
3945 | ||
4163eb72 MV |
3946 | SCM_DEFINE (scm_primitive_eval, "primitive-eval", 1, 0, 0, |
3947 | (SCM exp), | |
2069af38 | 3948 | "Evaluate @var{exp} in the top-level environment specified by\n" |
4163eb72 MV |
3949 | "the current module.") |
3950 | #define FUNC_NAME s_scm_primitive_eval | |
3951 | { | |
a513ead3 | 3952 | SCM env; |
bcdab802 | 3953 | SCM transformer = scm_current_module_transformer (); |
a513ead3 MV |
3954 | if (SCM_NIMP (transformer)) |
3955 | exp = scm_apply (transformer, exp, scm_listofnull); | |
3956 | env = scm_top_level_env (scm_current_module_lookup_closure ()); | |
4163eb72 MV |
3957 | return scm_i_eval (exp, env); |
3958 | } | |
3959 | #undef FUNC_NAME | |
3960 | ||
68d8be66 MD |
3961 | /* Eval does not take the second arg optionally. This is intentional |
3962 | * in order to be R5RS compatible, and to prepare for the new module | |
3963 | * system, where we would like to make the choice of evaluation | |
4163eb72 | 3964 | * environment explicit. */ |
549e6ec6 | 3965 | |
09074dbf DH |
3966 | static void |
3967 | change_environment (void *data) | |
3968 | { | |
3969 | SCM pair = SCM_PACK (data); | |
3970 | SCM new_module = SCM_CAR (pair); | |
aa767bc5 | 3971 | SCM old_module = scm_current_module (); |
09074dbf | 3972 | SCM_SETCDR (pair, old_module); |
aa767bc5 | 3973 | scm_set_current_module (new_module); |
09074dbf DH |
3974 | } |
3975 | ||
3976 | ||
09074dbf DH |
3977 | static void |
3978 | restore_environment (void *data) | |
3979 | { | |
3980 | SCM pair = SCM_PACK (data); | |
3981 | SCM old_module = SCM_CDR (pair); | |
aa767bc5 | 3982 | SCM new_module = scm_current_module (); |
2e9c835d | 3983 | SCM_SETCAR (pair, new_module); |
aa767bc5 | 3984 | scm_set_current_module (old_module); |
09074dbf DH |
3985 | } |
3986 | ||
4163eb72 MV |
3987 | static SCM |
3988 | inner_eval_x (void *data) | |
3989 | { | |
3990 | return scm_primitive_eval_x (SCM_PACK(data)); | |
3991 | } | |
3992 | ||
3993 | SCM | |
3994 | scm_eval_x (SCM exp, SCM module) | |
3995 | #define FUNC_NAME "eval!" | |
3996 | { | |
3997 | SCM_VALIDATE_MODULE (2, module); | |
3998 | ||
3999 | return scm_internal_dynamic_wind | |
4000 | (change_environment, inner_eval_x, restore_environment, | |
4001 | (void *) SCM_UNPACK (exp), | |
4002 | (void *) SCM_UNPACK (scm_cons (module, SCM_BOOL_F))); | |
4003 | } | |
4004 | #undef FUNC_NAME | |
4005 | ||
4006 | static SCM | |
4007 | inner_eval (void *data) | |
4008 | { | |
4009 | return scm_primitive_eval (SCM_PACK(data)); | |
4010 | } | |
09074dbf | 4011 | |
68d8be66 | 4012 | SCM_DEFINE (scm_eval, "eval", 2, 0, 0, |
4163eb72 MV |
4013 | (SCM exp, SCM module), |
4014 | "Evaluate @var{exp}, a list representing a Scheme expression,\n" | |
4015 | "in the top-level environment specified by @var{module}.\n" | |
4016 | "While @var{exp} is evaluated (using @var{primitive-eval}),\n" | |
4017 | "@var{module} is made the current module. The current module\n" | |
4018 | "is reset to its previous value when @var{eval} returns.") | |
1bbd0b84 | 4019 | #define FUNC_NAME s_scm_eval |
0f2d19dd | 4020 | { |
4163eb72 | 4021 | SCM_VALIDATE_MODULE (2, module); |
09074dbf DH |
4022 | |
4023 | return scm_internal_dynamic_wind | |
4024 | (change_environment, inner_eval, restore_environment, | |
4163eb72 MV |
4025 | (void *) SCM_UNPACK (exp), |
4026 | (void *) SCM_UNPACK (scm_cons (module, SCM_BOOL_F))); | |
0f2d19dd | 4027 | } |
1bbd0b84 | 4028 | #undef FUNC_NAME |
0f2d19dd | 4029 | |
68d8be66 | 4030 | #if (SCM_DEBUG_DEPRECATED == 0) |
1cc91f1b | 4031 | |
aa767bc5 | 4032 | /* Use scm_current_module () or scm_interaction_environment () |
68d8be66 MD |
4033 | * instead. The former is the module selected during loading of code. |
4034 | * The latter is the module in which the user of this thread currently | |
4035 | * types expressions. | |
4036 | */ | |
4037 | ||
4038 | SCM scm_top_level_lookup_closure_var; | |
bcdab802 | 4039 | SCM scm_system_transformer; |
68d8be66 MD |
4040 | |
4041 | /* Avoid using this functionality altogether (except for implementing | |
4042 | * libguile, where you can use scm_i_eval or scm_i_eval_x). | |
4043 | * | |
4163eb72 MV |
4044 | * Applications should use either C level scm_eval_x or Scheme |
4045 | * scm_eval; or scm_primitive_eval_x or scm_primitive_eval. */ | |
68d8be66 MD |
4046 | |
4047 | SCM | |
4048 | scm_eval_3 (SCM obj, int copyp, SCM env) | |
4049 | { | |
4050 | if (copyp) | |
4051 | return scm_i_eval (obj, env); | |
4052 | else | |
4053 | return scm_i_eval_x (obj, env); | |
4054 | } | |
4055 | ||
4056 | SCM_DEFINE (scm_eval2, "eval2", 2, 0, 0, | |
4057 | (SCM obj, SCM env_thunk), | |
4163eb72 MV |
4058 | "Evaluate @var{exp}, a Scheme expression, in the environment\n" |
4059 | "designated by @var{lookup}, a symbol-lookup function." | |
4060 | "Do not use this version of eval, it does not play well\n" | |
4061 | "with the module system. Use @code{eval} or\n" | |
4062 | "@code{primitive-eval} instead.") | |
68d8be66 | 4063 | #define FUNC_NAME s_scm_eval2 |
0f2d19dd | 4064 | { |
68d8be66 | 4065 | return scm_i_eval (obj, scm_top_level_env (env_thunk)); |
0f2d19dd | 4066 | } |
68d8be66 MD |
4067 | #undef FUNC_NAME |
4068 | ||
4069 | #endif /* DEPRECATED */ | |
0f2d19dd | 4070 | |
6dbd0af5 MD |
4071 | |
4072 | /* At this point, scm_deval and scm_dapply are generated. | |
4073 | */ | |
4074 | ||
0f2d19dd | 4075 | #ifdef DEBUG_EXTENSIONS |
6dbd0af5 MD |
4076 | # define DEVAL |
4077 | # include "eval.c" | |
0f2d19dd JB |
4078 | #endif |
4079 | ||
4080 | ||
1cc91f1b | 4081 | |
0f2d19dd JB |
4082 | void |
4083 | scm_init_eval () | |
0f2d19dd | 4084 | { |
33b97402 MD |
4085 | scm_init_opts (scm_evaluator_traps, |
4086 | scm_evaluator_trap_table, | |
4087 | SCM_N_EVALUATOR_TRAPS); | |
4088 | scm_init_opts (scm_eval_options_interface, | |
4089 | scm_eval_opts, | |
4090 | SCM_N_EVAL_OPTIONS); | |
4091 | ||
f99c9c28 MD |
4092 | scm_tc16_promise = scm_make_smob_type ("promise", 0); |
4093 | scm_set_smob_mark (scm_tc16_promise, scm_markcdr); | |
e841c3e0 | 4094 | scm_set_smob_print (scm_tc16_promise, promise_print); |
b8229a3b | 4095 | |
7c33806a DH |
4096 | /* Dirk:Fixme:: make scm_undefineds local to eval.c: it's only used here. */ |
4097 | scm_undefineds = scm_cons (SCM_UNDEFINED, SCM_EOL); | |
4098 | SCM_SETCDR (scm_undefineds, scm_undefineds); | |
4099 | scm_listofnull = scm_cons (SCM_EOL, SCM_EOL); | |
4100 | ||
81123e6d | 4101 | scm_f_apply = scm_make_subr ("apply", scm_tc7_lsubr_2, scm_apply); |
0f2d19dd | 4102 | |
86d31dfe MV |
4103 | /* acros */ |
4104 | /* end of acros */ | |
4105 | ||
68d8be66 | 4106 | #if SCM_DEBUG_DEPRECATED == 0 |
dc19d1d2 | 4107 | scm_top_level_lookup_closure_var = |
86d31dfe | 4108 | scm_c_define ("*top-level-lookup-closure*", scm_make_fluid ()); |
bcdab802 | 4109 | scm_system_transformer = |
86d31dfe | 4110 | scm_c_define ("scm:eval-transformer", scm_make_fluid ()); |
68d8be66 | 4111 | #endif |
0f2d19dd | 4112 | |
8dc9439f | 4113 | #ifndef SCM_MAGIC_SNARFER |
a0599745 | 4114 | #include "libguile/eval.x" |
8dc9439f | 4115 | #endif |
25eaf21a | 4116 | |
86d31dfe MV |
4117 | scm_c_define ("nil", scm_lisp_nil); |
4118 | scm_c_define ("t", scm_lisp_t); | |
4119 | ||
25eaf21a | 4120 | scm_add_feature ("delay"); |
0f2d19dd | 4121 | } |
0f2d19dd | 4122 | |
6dbd0af5 | 4123 | #endif /* !DEVAL */ |
89e00824 ML |
4124 | |
4125 | /* | |
4126 | Local Variables: | |
4127 | c-file-style: "gnu" | |
4128 | End: | |
4129 | */ |