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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 | |
ac13d9d2 | 71 | # pragma alloca |
48b96f4b JB |
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 | ||
17fa3fcf DH |
109 | #define SCM_VALIDATE_NON_EMPTY_COMBINATION(x) \ |
110 | do { \ | |
111 | if (SCM_EQ_P ((x), SCM_EOL)) \ | |
112 | scm_misc_error (NULL, scm_s_expression, SCM_EOL); \ | |
113 | } while (0) | |
114 | ||
115 | \f | |
116 | ||
6dbd0af5 MD |
117 | /* The evaluator contains a plethora of EVAL symbols. |
118 | * This is an attempt at explanation. | |
119 | * | |
120 | * The following macros should be used in code which is read twice | |
121 | * (where the choice of evaluator is hard soldered): | |
122 | * | |
123 | * SCM_CEVAL is the symbol used within one evaluator to call itself. | |
124 | * Originally, it is defined to scm_ceval, but is redefined to | |
125 | * scm_deval during the second pass. | |
126 | * | |
127 | * SIDEVAL corresponds to SCM_CEVAL, but is used in situations where | |
128 | * only side effects of expressions matter. All immediates are | |
129 | * ignored. | |
130 | * | |
6cb702da | 131 | * SCM_EVALIM is used when it is known that the expression is an |
6dbd0af5 MD |
132 | * immediate. (This macro never calls an evaluator.) |
133 | * | |
134 | * EVALCAR evaluates the car of an expression. | |
135 | * | |
136 | * EVALCELLCAR is like EVALCAR, but is used when it is known that the | |
137 | * car is a lisp cell. | |
138 | * | |
139 | * The following macros should be used in code which is read once | |
140 | * (where the choice of evaluator is dynamic): | |
141 | * | |
6cb702da | 142 | * SCM_XEVAL takes care of immediates without calling an evaluator. It |
6dbd0af5 MD |
143 | * then calls scm_ceval *or* scm_deval, depending on the debugging |
144 | * mode. | |
145 | * | |
6cb702da | 146 | * SCM_XEVALCAR corresponds to EVALCAR, but uses scm_ceval *or* scm_deval |
6dbd0af5 MD |
147 | * depending on the debugging mode. |
148 | * | |
149 | * The main motivation for keeping this plethora is efficiency | |
150 | * together with maintainability (=> locality of code). | |
151 | */ | |
152 | ||
6cb702da | 153 | #define SCM_CEVAL scm_ceval |
7d2b68a8 | 154 | #define SIDEVAL(x, env) if (SCM_NIMP (x)) SCM_CEVAL((x), (env)) |
6cb702da | 155 | |
7d2b68a8 MD |
156 | #define EVALCELLCAR(x, env) (SCM_SYMBOLP (SCM_CAR (x)) \ |
157 | ? *scm_lookupcar (x, env, 1) \ | |
158 | : SCM_CEVAL (SCM_CAR (x), env)) | |
0f2d19dd | 159 | |
22a52da1 | 160 | #define EVALCAR(x, env) (!SCM_CELLP (SCM_CAR (x)) \ |
7d2b68a8 MD |
161 | ? (SCM_IMP (SCM_CAR (x)) \ |
162 | ? SCM_EVALIM (SCM_CAR (x), env) \ | |
163 | : SCM_GLOC_VAL (SCM_CAR (x))) \ | |
164 | : EVALCELLCAR (x, env)) | |
0f2d19dd | 165 | |
e2806c10 | 166 | #define EXTEND_ENV SCM_EXTEND_ENV |
0f2d19dd JB |
167 | |
168 | #ifdef MEMOIZE_LOCALS | |
1cc91f1b | 169 | |
0f2d19dd | 170 | SCM * |
6e8d25a6 | 171 | scm_ilookup (SCM iloc, SCM env) |
0f2d19dd | 172 | { |
c014a02e | 173 | register long ir = SCM_IFRAME (iloc); |
0f2d19dd JB |
174 | register SCM er = env; |
175 | for (; 0 != ir; --ir) | |
176 | er = SCM_CDR (er); | |
177 | er = SCM_CAR (er); | |
178 | for (ir = SCM_IDIST (iloc); 0 != ir; --ir) | |
179 | er = SCM_CDR (er); | |
180 | if (SCM_ICDRP (iloc)) | |
a23afe53 MD |
181 | return SCM_CDRLOC (er); |
182 | return SCM_CARLOC (SCM_CDR (er)); | |
0f2d19dd JB |
183 | } |
184 | #endif | |
185 | ||
f8769b1d MV |
186 | #ifdef USE_THREADS |
187 | ||
188 | /* The Lookup Car Race | |
189 | - by Eva Luator | |
190 | ||
191 | Memoization of variables and special forms is done while executing | |
192 | the code for the first time. As long as there is only one thread | |
193 | everything is fine, but as soon as two threads execute the same | |
194 | code concurrently `for the first time' they can come into conflict. | |
195 | ||
196 | This memoization includes rewriting variable references into more | |
197 | efficient forms and expanding macros. Furthermore, macro expansion | |
198 | includes `compiling' special forms like `let', `cond', etc. into | |
199 | tree-code instructions. | |
200 | ||
201 | There shouldn't normally be a problem with memoizing local and | |
202 | global variable references (into ilocs and glocs), because all | |
203 | threads will mutate the code in *exactly* the same way and (if I | |
204 | read the C code correctly) it is not possible to observe a half-way | |
205 | mutated cons cell. The lookup procedure can handle this | |
206 | transparently without any critical sections. | |
207 | ||
208 | It is different with macro expansion, because macro expansion | |
209 | happens outside of the lookup procedure and can't be | |
210 | undone. Therefore it can't cope with it. It has to indicate | |
211 | failure when it detects a lost race and hope that the caller can | |
212 | handle it. Luckily, it turns out that this is the case. | |
213 | ||
214 | An example to illustrate this: Suppose that the follwing form will | |
215 | be memoized concurrently by two threads | |
216 | ||
217 | (let ((x 12)) x) | |
218 | ||
219 | Let's first examine the lookup of X in the body. The first thread | |
220 | decides that it has to find the symbol "x" in the environment and | |
221 | starts to scan it. Then the other thread takes over and actually | |
222 | overtakes the first. It looks up "x" and substitutes an | |
223 | appropriate iloc for it. Now the first thread continues and | |
224 | completes its lookup. It comes to exactly the same conclusions as | |
225 | the second one and could - without much ado - just overwrite the | |
226 | iloc with the same iloc. | |
227 | ||
228 | But let's see what will happen when the race occurs while looking | |
229 | up the symbol "let" at the start of the form. It could happen that | |
230 | the second thread interrupts the lookup of the first thread and not | |
231 | only substitutes a gloc for it but goes right ahead and replaces it | |
232 | with the compiled form (#@let* (x 12) x). Now, when the first | |
233 | thread completes its lookup, it would replace the #@let* with a | |
234 | gloc pointing to the "let" binding, effectively reverting the form | |
235 | to (let (x 12) x). This is wrong. It has to detect that it has | |
236 | lost the race and the evaluator has to reconsider the changed form | |
237 | completely. | |
238 | ||
239 | This race condition could be resolved with some kind of traffic | |
240 | light (like mutexes) around scm_lookupcar, but I think that it is | |
241 | best to avoid them in this case. They would serialize memoization | |
242 | completely and because lookup involves calling arbitrary Scheme | |
243 | code (via the lookup-thunk), threads could be blocked for an | |
244 | arbitrary amount of time or even deadlock. But with the current | |
245 | solution a lot of unnecessary work is potentially done. */ | |
246 | ||
247 | /* SCM_LOOKUPCAR1 is was SCM_LOOKUPCAR used to be but is allowed to | |
248 | return NULL to indicate a failed lookup due to some race conditions | |
249 | between threads. This only happens when VLOC is the first cell of | |
250 | a special form that will eventually be memoized (like `let', etc.) | |
251 | In that case the whole lookup is bogus and the caller has to | |
252 | reconsider the complete special form. | |
253 | ||
254 | SCM_LOOKUPCAR is still there, of course. It just calls | |
255 | SCM_LOOKUPCAR1 and aborts on recieving NULL. So SCM_LOOKUPCAR | |
256 | should only be called when it is known that VLOC is not the first | |
257 | pair of a special form. Otherwise, use SCM_LOOKUPCAR1 and check | |
26d5b9b4 MD |
258 | for NULL. I think I've found the only places where this |
259 | applies. */ | |
f8769b1d MV |
260 | |
261 | #endif /* USE_THREADS */ | |
1cc91f1b | 262 | |
f25f761d GH |
263 | SCM_SYMBOL (scm_unbound_variable_key, "unbound-variable"); |
264 | ||
d0b7bad7 | 265 | #ifdef USE_THREADS |
8ecf1f13 | 266 | static SCM * |
26d5b9b4 | 267 | scm_lookupcar1 (SCM vloc, SCM genv, int check) |
d0b7bad7 MD |
268 | #else |
269 | SCM * | |
26d5b9b4 | 270 | scm_lookupcar (SCM vloc, SCM genv, int check) |
d0b7bad7 | 271 | #endif |
0f2d19dd JB |
272 | { |
273 | SCM env = genv; | |
e3173f93 | 274 | register SCM *al, fl, var = SCM_CAR (vloc); |
0f2d19dd JB |
275 | #ifdef MEMOIZE_LOCALS |
276 | register SCM iloc = SCM_ILOC00; | |
277 | #endif | |
278 | for (; SCM_NIMP (env); env = SCM_CDR (env)) | |
279 | { | |
790071cd | 280 | if (!SCM_CONSP (SCM_CAR (env))) |
0f2d19dd | 281 | break; |
a23afe53 | 282 | al = SCM_CARLOC (env); |
0f2d19dd JB |
283 | for (fl = SCM_CAR (*al); SCM_NIMP (fl); fl = SCM_CDR (fl)) |
284 | { | |
285 | if (SCM_NCONSP (fl)) | |
33b97402 | 286 | { |
cf498326 | 287 | if (SCM_EQ_P (fl, var)) |
0f2d19dd JB |
288 | { |
289 | #ifdef MEMOIZE_LOCALS | |
f8769b1d | 290 | #ifdef USE_THREADS |
cf498326 | 291 | if (! SCM_EQ_P (SCM_CAR (vloc), var)) |
f8769b1d MV |
292 | goto race; |
293 | #endif | |
3201d763 | 294 | SCM_SET_CELL_WORD_0 (vloc, SCM_UNPACK (iloc) + SCM_ICDR); |
0f2d19dd | 295 | #endif |
a23afe53 | 296 | return SCM_CDRLOC (*al); |
0f2d19dd | 297 | } |
33b97402 MD |
298 | else |
299 | break; | |
300 | } | |
a23afe53 | 301 | al = SCM_CDRLOC (*al); |
cf498326 | 302 | if (SCM_EQ_P (SCM_CAR (fl), var)) |
0f2d19dd JB |
303 | { |
304 | #ifdef MEMOIZE_LOCALS | |
cf7c17e9 | 305 | #ifndef SCM_RECKLESS /* letrec inits to SCM_UNDEFINED */ |
0f2d19dd JB |
306 | if (SCM_UNBNDP (SCM_CAR (*al))) |
307 | { | |
308 | env = SCM_EOL; | |
309 | goto errout; | |
310 | } | |
f8769b1d MV |
311 | #endif |
312 | #ifdef USE_THREADS | |
c6772927 | 313 | if (!SCM_EQ_P (SCM_CAR (vloc), var)) |
f8769b1d | 314 | goto race; |
0f2d19dd | 315 | #endif |
a23afe53 | 316 | SCM_SETCAR (vloc, iloc); |
0f2d19dd | 317 | #endif |
a23afe53 | 318 | return SCM_CARLOC (*al); |
0f2d19dd JB |
319 | } |
320 | #ifdef MEMOIZE_LOCALS | |
3201d763 | 321 | iloc = SCM_PACK (SCM_UNPACK (iloc) + SCM_IDINC); |
0f2d19dd JB |
322 | #endif |
323 | } | |
324 | #ifdef MEMOIZE_LOCALS | |
3201d763 | 325 | iloc = SCM_PACK ((~SCM_IDSTMSK) & (SCM_UNPACK(iloc) + SCM_IFRINC)); |
0f2d19dd JB |
326 | #endif |
327 | } | |
328 | { | |
86d31dfe | 329 | SCM top_thunk, real_var; |
790071cd | 330 | if (SCM_NIMP (env)) |
0f2d19dd | 331 | { |
86d31dfe MV |
332 | top_thunk = SCM_CAR (env); /* env now refers to a |
333 | top level env thunk */ | |
0f2d19dd JB |
334 | env = SCM_CDR (env); |
335 | } | |
336 | else | |
337 | top_thunk = SCM_BOOL_F; | |
86d31dfe MV |
338 | real_var = scm_sym2var (var, top_thunk, SCM_BOOL_F); |
339 | if (SCM_FALSEP (real_var)) | |
0f2d19dd | 340 | goto errout; |
86d31dfe | 341 | |
cf7c17e9 | 342 | #ifndef SCM_RECKLESS |
86d31dfe MV |
343 | if (SCM_NNULLP (env) || SCM_UNBNDP (SCM_VARIABLE_REF (real_var))) |
344 | { | |
345 | errout: | |
346 | /* scm_everr (vloc, genv,...) */ | |
347 | if (check) | |
348 | { | |
349 | if (SCM_NULLP (env)) | |
350 | scm_error (scm_unbound_variable_key, NULL, | |
351 | "Unbound variable: ~S", | |
352 | scm_cons (var, SCM_EOL), SCM_BOOL_F); | |
353 | else | |
354 | scm_misc_error (NULL, "Damaged environment: ~S", | |
355 | scm_cons (var, SCM_EOL)); | |
356 | } | |
357 | else | |
358 | { | |
359 | /* A variable could not be found, but we shall | |
360 | not throw an error. */ | |
361 | static SCM undef_object = SCM_UNDEFINED; | |
362 | return &undef_object; | |
363 | } | |
09e4d064 | 364 | } |
0f2d19dd | 365 | #endif |
86d31dfe | 366 | |
f8769b1d | 367 | #ifdef USE_THREADS |
c6772927 | 368 | if (!SCM_EQ_P (SCM_CAR (vloc), var)) |
86d31dfe MV |
369 | { |
370 | /* Some other thread has changed the very cell we are working | |
371 | on. In effect, it must have done our job or messed it up | |
372 | completely. */ | |
373 | race: | |
374 | var = SCM_CAR (vloc); | |
375 | if (SCM_ITAG3 (var) == scm_tc3_cons_gloc) | |
376 | return SCM_GLOC_VAL_LOC (var); | |
f8769b1d | 377 | #ifdef MEMOIZE_LOCALS |
86d31dfe MV |
378 | if (SCM_ITAG7 (var) == SCM_ITAG7 (SCM_ILOC00)) |
379 | return scm_ilookup (var, genv); | |
f8769b1d | 380 | #endif |
86d31dfe MV |
381 | /* We can't cope with anything else than glocs and ilocs. When |
382 | a special form has been memoized (i.e. `let' into `#@let') we | |
383 | return NULL and expect the calling function to do the right | |
384 | thing. For the evaluator, this means going back and redoing | |
385 | the dispatch on the car of the form. */ | |
386 | return NULL; | |
387 | } | |
f8769b1d MV |
388 | #endif /* USE_THREADS */ |
389 | ||
86d31dfe MV |
390 | SCM_SET_CELL_WORD_0 (vloc, SCM_UNPACK (real_var) + scm_tc3_cons_gloc); |
391 | return SCM_VARIABLE_LOC (real_var); | |
392 | } | |
0f2d19dd JB |
393 | } |
394 | ||
f8769b1d MV |
395 | #ifdef USE_THREADS |
396 | SCM * | |
6e8d25a6 | 397 | scm_lookupcar (SCM vloc, SCM genv, int check) |
f8769b1d | 398 | { |
26d5b9b4 | 399 | SCM *loc = scm_lookupcar1 (vloc, genv, check); |
f8769b1d MV |
400 | if (loc == NULL) |
401 | abort (); | |
402 | return loc; | |
403 | } | |
f8769b1d MV |
404 | #endif |
405 | ||
0f2d19dd | 406 | #define unmemocar scm_unmemocar |
1cc91f1b | 407 | |
86d31dfe MV |
408 | SCM_SYMBOL (sym_three_question_marks, "???"); |
409 | ||
0f2d19dd | 410 | SCM |
6e8d25a6 | 411 | scm_unmemocar (SCM form, SCM env) |
0f2d19dd | 412 | { |
0f2d19dd JB |
413 | SCM c; |
414 | ||
415 | if (SCM_IMP (form)) | |
416 | return form; | |
417 | c = SCM_CAR (form); | |
b0c54567 | 418 | if (SCM_ITAG3 (c) == scm_tc3_cons_gloc) |
86d31dfe MV |
419 | { |
420 | SCM sym = | |
421 | scm_module_reverse_lookup (scm_env_module (env), SCM_GLOC_VAR (c)); | |
c6772927 | 422 | if (SCM_EQ_P (sym, SCM_BOOL_F)) |
86d31dfe MV |
423 | sym = sym_three_question_marks; |
424 | SCM_SETCAR (form, sym); | |
425 | } | |
0f2d19dd | 426 | #ifdef MEMOIZE_LOCALS |
6dbd0af5 | 427 | #ifdef DEBUG_EXTENSIONS |
0f2d19dd JB |
428 | else if (SCM_ILOCP (c)) |
429 | { | |
c014a02e | 430 | long ir; |
b0c54567 | 431 | |
0f2d19dd JB |
432 | for (ir = SCM_IFRAME (c); ir != 0; --ir) |
433 | env = SCM_CDR (env); | |
434 | env = SCM_CAR (SCM_CAR (env)); | |
435 | for (ir = SCM_IDIST (c); ir != 0; --ir) | |
436 | env = SCM_CDR (env); | |
a23afe53 | 437 | SCM_SETCAR (form, SCM_ICDRP (c) ? env : SCM_CAR (env)); |
0f2d19dd | 438 | } |
6dbd0af5 | 439 | #endif |
0f2d19dd JB |
440 | #endif |
441 | return form; | |
442 | } | |
443 | ||
1cc91f1b | 444 | |
0f2d19dd | 445 | SCM |
6e8d25a6 | 446 | scm_eval_car (SCM pair, SCM env) |
0f2d19dd | 447 | { |
6cb702da | 448 | return SCM_XEVALCAR (pair, env); |
0f2d19dd JB |
449 | } |
450 | ||
451 | \f | |
452 | /* | |
453 | * The following rewrite expressions and | |
454 | * some memoized forms have different syntax | |
455 | */ | |
456 | ||
3eeba8d4 JB |
457 | const char scm_s_expression[] = "missing or extra expression"; |
458 | const char scm_s_test[] = "bad test"; | |
459 | const char scm_s_body[] = "bad body"; | |
460 | const char scm_s_bindings[] = "bad bindings"; | |
185ab0ef | 461 | const char scm_s_duplicate_bindings[] = "duplicate bindings"; |
3eeba8d4 JB |
462 | const char scm_s_variable[] = "bad variable"; |
463 | const char scm_s_clauses[] = "bad or missing clauses"; | |
464 | const char scm_s_formals[] = "bad formals"; | |
5280aaca | 465 | const char scm_s_duplicate_formals[] = "duplicate formals"; |
0f2d19dd | 466 | |
85db4a2c DH |
467 | SCM_GLOBAL_SYMBOL (scm_sym_dot, "."); |
468 | SCM_GLOBAL_SYMBOL (scm_sym_arrow, "=>"); | |
469 | SCM_GLOBAL_SYMBOL (scm_sym_else, "else"); | |
470 | SCM_GLOBAL_SYMBOL (scm_sym_unquote, "unquote"); | |
471 | SCM_GLOBAL_SYMBOL (scm_sym_uq_splicing, "unquote-splicing"); | |
81123e6d MD |
472 | |
473 | SCM scm_f_apply; | |
b8229a3b | 474 | |
6dbd0af5 | 475 | #ifdef DEBUG_EXTENSIONS |
85db4a2c DH |
476 | SCM_GLOBAL_SYMBOL (scm_sym_enter_frame, "enter-frame"); |
477 | SCM_GLOBAL_SYMBOL (scm_sym_apply_frame, "apply-frame"); | |
478 | SCM_GLOBAL_SYMBOL (scm_sym_exit_frame, "exit-frame"); | |
479 | SCM_GLOBAL_SYMBOL (scm_sym_trace, "trace"); | |
6dbd0af5 | 480 | #endif |
0f2d19dd | 481 | |
0f2d19dd | 482 | |
26d5b9b4 MD |
483 | /* Check that the body denoted by XORIG is valid and rewrite it into |
484 | its internal form. The internal form of a body is just the body | |
485 | itself, but prefixed with an ISYM that denotes to what kind of | |
486 | outer construct this body belongs. A lambda body starts with | |
487 | SCM_IM_LAMBDA, for example, a body of a let starts with SCM_IM_LET, | |
488 | etc. The one exception is a body that belongs to a letrec that has | |
489 | been formed by rewriting internal defines: it starts with | |
490 | SCM_IM_DEFINE. */ | |
491 | ||
492 | /* XXX - Besides controlling the rewriting of internal defines, the | |
493 | additional ISYM could be used for improved error messages. | |
494 | This is not done yet. */ | |
495 | ||
496 | static SCM | |
6e8d25a6 | 497 | scm_m_body (SCM op, SCM xorig, const char *what) |
26d5b9b4 | 498 | { |
160bb34a | 499 | SCM_ASSYNT (scm_ilength (xorig) >= 1, scm_s_expression, what); |
26d5b9b4 MD |
500 | |
501 | /* Don't add another ISYM if one is present already. */ | |
502 | if (SCM_ISYMP (SCM_CAR (xorig))) | |
503 | return xorig; | |
504 | ||
505 | /* Retain possible doc string. */ | |
44d3cb0d | 506 | if (!SCM_CONSP (SCM_CAR (xorig))) |
26d5b9b4 MD |
507 | { |
508 | if (SCM_NNULLP (SCM_CDR(xorig))) | |
509 | return scm_cons (SCM_CAR (xorig), | |
510 | scm_m_body (op, SCM_CDR(xorig), what)); | |
511 | return xorig; | |
512 | } | |
513 | ||
ab66ae47 | 514 | return scm_cons (op, xorig); |
26d5b9b4 MD |
515 | } |
516 | ||
b8229a3b | 517 | SCM_SYNTAX(s_quote,"quote", scm_makmmacro, scm_m_quote); |
2f0d1375 | 518 | SCM_GLOBAL_SYMBOL(scm_sym_quote, s_quote); |
1cc91f1b | 519 | |
0f2d19dd | 520 | SCM |
e81d98ec | 521 | scm_m_quote (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 522 | { |
26d5b9b4 MD |
523 | SCM x = scm_copy_tree (SCM_CDR (xorig)); |
524 | ||
160bb34a | 525 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, scm_s_expression, s_quote); |
3a3111a8 | 526 | return scm_cons (SCM_IM_QUOTE, x); |
0f2d19dd JB |
527 | } |
528 | ||
529 | ||
1cc91f1b | 530 | |
b8229a3b | 531 | SCM_SYNTAX(s_begin, "begin", scm_makmmacro, scm_m_begin); |
2f0d1375 | 532 | SCM_GLOBAL_SYMBOL(scm_sym_begin, s_begin); |
b8229a3b | 533 | |
0f2d19dd | 534 | SCM |
e81d98ec | 535 | scm_m_begin (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 536 | { |
160bb34a | 537 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) >= 1, scm_s_expression, s_begin); |
3a3111a8 | 538 | return scm_cons (SCM_IM_BEGIN, SCM_CDR (xorig)); |
0f2d19dd JB |
539 | } |
540 | ||
b8229a3b | 541 | SCM_SYNTAX(s_if, "if", scm_makmmacro, scm_m_if); |
2f0d1375 | 542 | SCM_GLOBAL_SYMBOL(scm_sym_if, s_if); |
1cc91f1b | 543 | |
0f2d19dd | 544 | SCM |
e81d98ec | 545 | scm_m_if (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 546 | { |
c014a02e | 547 | long len = scm_ilength (SCM_CDR (xorig)); |
160bb34a | 548 | SCM_ASSYNT (len >= 2 && len <= 3, scm_s_expression, "if"); |
3a3111a8 | 549 | return scm_cons (SCM_IM_IF, SCM_CDR (xorig)); |
0f2d19dd JB |
550 | } |
551 | ||
552 | ||
89efbff4 MD |
553 | /* Will go into the RnRS module when Guile is factorized. |
554 | SCM_SYNTAX(scm_s_set_x,"set!", scm_makmmacro, scm_m_set_x); */ | |
555 | const char scm_s_set_x[] = "set!"; | |
556 | SCM_GLOBAL_SYMBOL(scm_sym_set_x, scm_s_set_x); | |
1cc91f1b | 557 | |
0f2d19dd | 558 | SCM |
e81d98ec | 559 | scm_m_set_x (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 560 | { |
6dbd0af5 | 561 | SCM x = SCM_CDR (xorig); |
160bb34a DH |
562 | SCM_ASSYNT (2 == scm_ilength (x), scm_s_expression, scm_s_set_x); |
563 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (x)), scm_s_variable, scm_s_set_x); | |
3a3111a8 | 564 | return scm_cons (SCM_IM_SET_X, x); |
0f2d19dd JB |
565 | } |
566 | ||
567 | ||
b8229a3b | 568 | SCM_SYNTAX(s_and, "and", scm_makmmacro, scm_m_and); |
2f0d1375 | 569 | SCM_GLOBAL_SYMBOL(scm_sym_and, s_and); |
1cc91f1b | 570 | |
0f2d19dd | 571 | SCM |
e81d98ec | 572 | scm_m_and (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 573 | { |
c014a02e | 574 | long len = scm_ilength (SCM_CDR (xorig)); |
160bb34a | 575 | SCM_ASSYNT (len >= 0, scm_s_test, s_and); |
0f2d19dd | 576 | if (len >= 1) |
3a3111a8 | 577 | return scm_cons (SCM_IM_AND, SCM_CDR (xorig)); |
0f2d19dd JB |
578 | else |
579 | return SCM_BOOL_T; | |
580 | } | |
581 | ||
b8229a3b | 582 | SCM_SYNTAX(s_or,"or", scm_makmmacro, scm_m_or); |
2f0d1375 | 583 | SCM_GLOBAL_SYMBOL(scm_sym_or,s_or); |
1cc91f1b | 584 | |
0f2d19dd | 585 | SCM |
e81d98ec | 586 | scm_m_or (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 587 | { |
c014a02e | 588 | long len = scm_ilength (SCM_CDR (xorig)); |
160bb34a | 589 | SCM_ASSYNT (len >= 0, scm_s_test, s_or); |
0f2d19dd | 590 | if (len >= 1) |
3a3111a8 | 591 | return scm_cons (SCM_IM_OR, SCM_CDR (xorig)); |
0f2d19dd JB |
592 | else |
593 | return SCM_BOOL_F; | |
594 | } | |
595 | ||
596 | ||
b8229a3b | 597 | SCM_SYNTAX(s_case, "case", scm_makmmacro, scm_m_case); |
2f0d1375 | 598 | SCM_GLOBAL_SYMBOL(scm_sym_case, s_case); |
1cc91f1b | 599 | |
0f2d19dd | 600 | SCM |
e81d98ec | 601 | scm_m_case (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 602 | { |
26d5b9b4 | 603 | SCM proc, cdrx = scm_list_copy (SCM_CDR (xorig)), x = cdrx; |
160bb34a | 604 | SCM_ASSYNT (scm_ilength (x) >= 2, scm_s_clauses, s_case); |
0f2d19dd JB |
605 | while (SCM_NIMP (x = SCM_CDR (x))) |
606 | { | |
607 | proc = SCM_CAR (x); | |
160bb34a | 608 | SCM_ASSYNT (scm_ilength (proc) >= 2, scm_s_clauses, s_case); |
6cb702da | 609 | SCM_ASSYNT (scm_ilength (SCM_CAR (proc)) >= 0 |
4567ed78 DH |
610 | || (SCM_EQ_P (scm_sym_else, SCM_CAR (proc)) |
611 | && SCM_NULLP (SCM_CDR (x))), | |
160bb34a | 612 | scm_s_clauses, s_case); |
0f2d19dd | 613 | } |
3a3111a8 | 614 | return scm_cons (SCM_IM_CASE, cdrx); |
0f2d19dd JB |
615 | } |
616 | ||
617 | ||
b8229a3b | 618 | SCM_SYNTAX(s_cond, "cond", scm_makmmacro, scm_m_cond); |
2f0d1375 | 619 | SCM_GLOBAL_SYMBOL(scm_sym_cond, s_cond); |
b8229a3b | 620 | |
1cc91f1b | 621 | |
0f2d19dd | 622 | SCM |
e81d98ec | 623 | scm_m_cond (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 624 | { |
26d5b9b4 | 625 | SCM arg1, cdrx = scm_list_copy (SCM_CDR (xorig)), x = cdrx; |
c014a02e | 626 | long len = scm_ilength (x); |
160bb34a | 627 | SCM_ASSYNT (len >= 1, scm_s_clauses, s_cond); |
0f2d19dd JB |
628 | while (SCM_NIMP (x)) |
629 | { | |
630 | arg1 = SCM_CAR (x); | |
631 | len = scm_ilength (arg1); | |
160bb34a | 632 | SCM_ASSYNT (len >= 1, scm_s_clauses, s_cond); |
cf498326 | 633 | if (SCM_EQ_P (scm_sym_else, SCM_CAR (arg1))) |
0f2d19dd | 634 | { |
6cb702da | 635 | SCM_ASSYNT (SCM_NULLP (SCM_CDR (x)) && len >= 2, |
160bb34a | 636 | "bad ELSE clause", s_cond); |
a23afe53 | 637 | SCM_SETCAR (arg1, SCM_BOOL_T); |
0f2d19dd | 638 | } |
cf498326 | 639 | if (len >= 2 && SCM_EQ_P (scm_sym_arrow, SCM_CAR (SCM_CDR (arg1)))) |
6cb702da | 640 | SCM_ASSYNT (3 == len && SCM_NIMP (SCM_CAR (SCM_CDR (SCM_CDR (arg1)))), |
160bb34a | 641 | "bad recipient", s_cond); |
0f2d19dd JB |
642 | x = SCM_CDR (x); |
643 | } | |
3a3111a8 | 644 | return scm_cons (SCM_IM_COND, cdrx); |
0f2d19dd JB |
645 | } |
646 | ||
b8229a3b | 647 | SCM_SYNTAX(s_lambda, "lambda", scm_makmmacro, scm_m_lambda); |
2f0d1375 | 648 | SCM_GLOBAL_SYMBOL(scm_sym_lambda, s_lambda); |
1cc91f1b | 649 | |
c6772927 | 650 | /* Return true if OBJ is `eq?' to one of the elements of LIST or to the |
5280aaca MV |
651 | cdr of the last cons. (Thus, LIST is not required to be a proper |
652 | list and when OBJ also found in the improper ending.) */ | |
653 | ||
654 | static int | |
655 | scm_c_improper_memq (SCM obj, SCM list) | |
656 | { | |
657 | for (; SCM_CONSP (list); list = SCM_CDR (list)) | |
658 | { | |
659 | if (SCM_EQ_P (SCM_CAR (list), obj)) | |
c6772927 | 660 | return 1; |
5280aaca MV |
661 | } |
662 | return SCM_EQ_P (list, obj); | |
663 | } | |
664 | ||
0f2d19dd | 665 | SCM |
e81d98ec | 666 | scm_m_lambda (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd JB |
667 | { |
668 | SCM proc, x = SCM_CDR (xorig); | |
26d5b9b4 | 669 | if (scm_ilength (x) < 2) |
0f2d19dd JB |
670 | goto badforms; |
671 | proc = SCM_CAR (x); | |
33b97402 MD |
672 | if (SCM_NULLP (proc)) |
673 | goto memlambda; | |
cf498326 | 674 | if (SCM_EQ_P (SCM_IM_LET, proc)) /* named let */ |
26d5b9b4 | 675 | goto memlambda; |
33b97402 MD |
676 | if (SCM_IMP (proc)) |
677 | goto badforms; | |
678 | if (SCM_SYMBOLP (proc)) | |
679 | goto memlambda; | |
680 | if (SCM_NCONSP (proc)) | |
681 | goto badforms; | |
682 | while (SCM_NIMP (proc)) | |
0f2d19dd | 683 | { |
33b97402 MD |
684 | if (SCM_NCONSP (proc)) |
685 | { | |
0f2d19dd | 686 | if (!SCM_SYMBOLP (proc)) |
33b97402 MD |
687 | goto badforms; |
688 | else | |
689 | goto memlambda; | |
690 | } | |
0c95b57d | 691 | if (!SCM_SYMBOLP (SCM_CAR (proc))) |
0f2d19dd | 692 | goto badforms; |
5280aaca | 693 | else if (scm_c_improper_memq (SCM_CAR(proc), SCM_CDR(proc))) |
db4b4ca6 | 694 | scm_misc_error (s_lambda, scm_s_duplicate_formals, SCM_EOL); |
0f2d19dd JB |
695 | proc = SCM_CDR (proc); |
696 | } | |
ff467021 | 697 | if (SCM_NNULLP (proc)) |
26d5b9b4 MD |
698 | { |
699 | badforms: | |
db4b4ca6 | 700 | scm_misc_error (s_lambda, scm_s_formals, SCM_EOL); |
26d5b9b4 MD |
701 | } |
702 | ||
703 | memlambda: | |
3a3111a8 MD |
704 | return scm_cons2 (SCM_IM_LAMBDA, SCM_CAR (x), |
705 | scm_m_body (SCM_IM_LAMBDA, SCM_CDR (x), s_lambda)); | |
0f2d19dd JB |
706 | } |
707 | ||
b8229a3b | 708 | SCM_SYNTAX(s_letstar,"let*", scm_makmmacro, scm_m_letstar); |
2f0d1375 | 709 | SCM_GLOBAL_SYMBOL(scm_sym_letstar,s_letstar); |
0f2d19dd | 710 | |
1cc91f1b | 711 | |
0f2d19dd | 712 | SCM |
e81d98ec | 713 | scm_m_letstar (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd JB |
714 | { |
715 | SCM x = SCM_CDR (xorig), arg1, proc, vars = SCM_EOL, *varloc = &vars; | |
c014a02e | 716 | long len = scm_ilength (x); |
160bb34a | 717 | SCM_ASSYNT (len >= 2, scm_s_body, s_letstar); |
0f2d19dd | 718 | proc = SCM_CAR (x); |
160bb34a | 719 | SCM_ASSYNT (scm_ilength (proc) >= 0, scm_s_bindings, s_letstar); |
ff467021 | 720 | while (SCM_NIMP (proc)) |
0f2d19dd JB |
721 | { |
722 | arg1 = SCM_CAR (proc); | |
160bb34a DH |
723 | SCM_ASSYNT (2 == scm_ilength (arg1), scm_s_bindings, s_letstar); |
724 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (arg1)), scm_s_variable, s_letstar); | |
0f2d19dd | 725 | *varloc = scm_cons2 (SCM_CAR (arg1), SCM_CAR (SCM_CDR (arg1)), SCM_EOL); |
a23afe53 | 726 | varloc = SCM_CDRLOC (SCM_CDR (*varloc)); |
0f2d19dd JB |
727 | proc = SCM_CDR (proc); |
728 | } | |
729 | x = scm_cons (vars, SCM_CDR (x)); | |
26d5b9b4 | 730 | |
3a3111a8 MD |
731 | return scm_cons2 (SCM_IM_LETSTAR, SCM_CAR (x), |
732 | scm_m_body (SCM_IM_LETSTAR, SCM_CDR (x), s_letstar)); | |
0f2d19dd JB |
733 | } |
734 | ||
735 | /* DO gets the most radically altered syntax | |
736 | (do ((<var1> <init1> <step1>) | |
737 | (<var2> <init2>) | |
738 | ... ) | |
739 | (<test> <return>) | |
740 | <body>) | |
741 | ;; becomes | |
742 | (do_mem (varn ... var2 var1) | |
743 | (<init1> <init2> ... <initn>) | |
744 | (<test> <return>) | |
745 | (<body>) | |
746 | <step1> <step2> ... <stepn>) ;; missing steps replaced by var | |
747 | */ | |
748 | ||
b8229a3b | 749 | SCM_SYNTAX(s_do, "do", scm_makmmacro, scm_m_do); |
2f0d1375 | 750 | SCM_GLOBAL_SYMBOL(scm_sym_do, s_do); |
1cc91f1b | 751 | |
0f2d19dd | 752 | SCM |
e81d98ec | 753 | scm_m_do (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd JB |
754 | { |
755 | SCM x = SCM_CDR (xorig), arg1, proc; | |
756 | SCM vars = SCM_EOL, inits = SCM_EOL, steps = SCM_EOL; | |
757 | SCM *initloc = &inits, *steploc = &steps; | |
c014a02e | 758 | long len = scm_ilength (x); |
160bb34a | 759 | SCM_ASSYNT (len >= 2, scm_s_test, "do"); |
0f2d19dd | 760 | proc = SCM_CAR (x); |
160bb34a | 761 | SCM_ASSYNT (scm_ilength (proc) >= 0, scm_s_bindings, "do"); |
ff467021 | 762 | while (SCM_NIMP(proc)) |
0f2d19dd JB |
763 | { |
764 | arg1 = SCM_CAR (proc); | |
765 | len = scm_ilength (arg1); | |
160bb34a DH |
766 | SCM_ASSYNT (2 == len || 3 == len, scm_s_bindings, "do"); |
767 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (arg1)), scm_s_variable, "do"); | |
0f2d19dd JB |
768 | /* vars reversed here, inits and steps reversed at evaluation */ |
769 | vars = scm_cons (SCM_CAR (arg1), vars); /* variable */ | |
770 | arg1 = SCM_CDR (arg1); | |
771 | *initloc = scm_cons (SCM_CAR (arg1), SCM_EOL); /* init */ | |
a23afe53 | 772 | initloc = SCM_CDRLOC (*initloc); |
0f2d19dd JB |
773 | arg1 = SCM_CDR (arg1); |
774 | *steploc = scm_cons (SCM_IMP (arg1) ? SCM_CAR (vars) : SCM_CAR (arg1), SCM_EOL); /* step */ | |
a23afe53 | 775 | steploc = SCM_CDRLOC (*steploc); |
0f2d19dd JB |
776 | proc = SCM_CDR (proc); |
777 | } | |
778 | x = SCM_CDR (x); | |
160bb34a | 779 | SCM_ASSYNT (scm_ilength (SCM_CAR (x)) >= 1, scm_s_test, "do"); |
0f2d19dd JB |
780 | x = scm_cons2 (SCM_CAR (x), SCM_CDR (x), steps); |
781 | x = scm_cons2 (vars, inits, x); | |
3a3111a8 | 782 | return scm_cons (SCM_IM_DO, x); |
0f2d19dd JB |
783 | } |
784 | ||
6dbd0af5 MD |
785 | /* evalcar is small version of inline EVALCAR when we don't care about |
786 | * speed | |
787 | */ | |
788 | #define evalcar scm_eval_car | |
0f2d19dd | 789 | |
1cc91f1b | 790 | |
c014a02e | 791 | static SCM iqq (SCM form, SCM env, long depth); |
1cc91f1b | 792 | |
b8229a3b | 793 | SCM_SYNTAX(s_quasiquote, "quasiquote", scm_makacro, scm_m_quasiquote); |
2f0d1375 | 794 | SCM_GLOBAL_SYMBOL(scm_sym_quasiquote, s_quasiquote); |
b8229a3b MS |
795 | |
796 | SCM | |
6e8d25a6 | 797 | scm_m_quasiquote (SCM xorig, SCM env) |
b8229a3b MS |
798 | { |
799 | SCM x = SCM_CDR (xorig); | |
160bb34a | 800 | SCM_ASSYNT (scm_ilength (x) == 1, scm_s_expression, s_quasiquote); |
b8229a3b MS |
801 | return iqq (SCM_CAR (x), env, 1); |
802 | } | |
803 | ||
804 | ||
0f2d19dd | 805 | static SCM |
c014a02e | 806 | iqq (SCM form, SCM env, long depth) |
0f2d19dd JB |
807 | { |
808 | SCM tmp; | |
c014a02e | 809 | long edepth = depth; |
22a52da1 | 810 | if (SCM_IMP (form)) |
ff467021 | 811 | return form; |
0f2d19dd JB |
812 | if (SCM_VECTORP (form)) |
813 | { | |
c014a02e | 814 | long i = SCM_VECTOR_LENGTH (form); |
0f2d19dd JB |
815 | SCM *data = SCM_VELTS (form); |
816 | tmp = SCM_EOL; | |
817 | for (; --i >= 0;) | |
818 | tmp = scm_cons (data[i], tmp); | |
819 | return scm_vector (iqq (tmp, env, depth)); | |
820 | } | |
22a52da1 | 821 | if (!SCM_CONSP (form)) |
ff467021 | 822 | return form; |
0f2d19dd | 823 | tmp = SCM_CAR (form); |
cf498326 | 824 | if (SCM_EQ_P (scm_sym_quasiquote, tmp)) |
0f2d19dd JB |
825 | { |
826 | depth++; | |
827 | goto label; | |
828 | } | |
cf498326 | 829 | if (SCM_EQ_P (scm_sym_unquote, tmp)) |
0f2d19dd JB |
830 | { |
831 | --depth; | |
832 | label: | |
833 | form = SCM_CDR (form); | |
0c95b57d GB |
834 | SCM_ASSERT (SCM_ECONSP (form) && SCM_NULLP (SCM_CDR (form)), |
835 | form, SCM_ARG1, s_quasiquote); | |
0f2d19dd JB |
836 | if (0 == depth) |
837 | return evalcar (form, env); | |
838 | return scm_cons2 (tmp, iqq (SCM_CAR (form), env, depth), SCM_EOL); | |
839 | } | |
22a52da1 | 840 | if (SCM_CONSP (tmp) && (SCM_EQ_P (scm_sym_uq_splicing, SCM_CAR (tmp)))) |
0f2d19dd JB |
841 | { |
842 | tmp = SCM_CDR (tmp); | |
843 | if (0 == --edepth) | |
844 | return scm_append (scm_cons2 (evalcar (tmp, env), iqq (SCM_CDR (form), env, depth), SCM_EOL)); | |
845 | } | |
846 | return scm_cons (iqq (SCM_CAR (form), env, edepth), iqq (SCM_CDR (form), env, depth)); | |
847 | } | |
848 | ||
849 | /* Here are acros which return values rather than code. */ | |
850 | ||
a570e93a MD |
851 | SCM_SYNTAX (s_delay, "delay", scm_makmmacro, scm_m_delay); |
852 | SCM_GLOBAL_SYMBOL (scm_sym_delay, s_delay); | |
1cc91f1b | 853 | |
0f2d19dd | 854 | SCM |
e81d98ec | 855 | scm_m_delay (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 856 | { |
160bb34a | 857 | SCM_ASSYNT (scm_ilength (xorig) == 2, scm_s_expression, s_delay); |
a570e93a | 858 | return scm_cons2 (SCM_IM_DELAY, SCM_EOL, SCM_CDR (xorig)); |
0f2d19dd JB |
859 | } |
860 | ||
1cc91f1b | 861 | |
b8229a3b | 862 | SCM_SYNTAX(s_define, "define", scm_makmmacro, scm_m_define); |
2f0d1375 | 863 | SCM_GLOBAL_SYMBOL(scm_sym_define, s_define); |
1cc91f1b | 864 | |
0f2d19dd | 865 | SCM |
6e8d25a6 | 866 | scm_m_define (SCM x, SCM env) |
0f2d19dd JB |
867 | { |
868 | SCM proc, arg1 = x; | |
869 | x = SCM_CDR (x); | |
160bb34a | 870 | SCM_ASSYNT (scm_ilength (x) >= 2, scm_s_expression, s_define); |
0f2d19dd JB |
871 | proc = SCM_CAR (x); |
872 | x = SCM_CDR (x); | |
0c95b57d | 873 | while (SCM_CONSP (proc)) |
0f2d19dd | 874 | { /* nested define syntax */ |
2f0d1375 | 875 | x = scm_cons (scm_cons2 (scm_sym_lambda, SCM_CDR (proc), x), SCM_EOL); |
0f2d19dd JB |
876 | proc = SCM_CAR (proc); |
877 | } | |
160bb34a DH |
878 | SCM_ASSYNT (SCM_SYMBOLP (proc), scm_s_variable, s_define); |
879 | SCM_ASSYNT (1 == scm_ilength (x), scm_s_expression, s_define); | |
0f2d19dd JB |
880 | if (SCM_TOP_LEVEL (env)) |
881 | { | |
882 | x = evalcar (x, env); | |
6dbd0af5 | 883 | #ifdef DEBUG_EXTENSIONS |
80ea260c MD |
884 | if (SCM_REC_PROCNAMES_P && SCM_NIMP (x)) |
885 | { | |
886 | arg1 = x; | |
887 | proc: | |
888 | if (SCM_CLOSUREP (arg1) | |
889 | /* Only the first definition determines the name. */ | |
cf498326 | 890 | && SCM_FALSEP (scm_procedure_property (arg1, scm_sym_name))) |
2f0d1375 | 891 | scm_set_procedure_property_x (arg1, scm_sym_name, proc); |
22a52da1 DH |
892 | else if (SCM_MACROP (arg1) |
893 | /* Dirk::FIXME: Does the following test make sense? */ | |
894 | && !SCM_EQ_P (SCM_MACRO_CODE (arg1), arg1)) | |
80ea260c | 895 | { |
22a52da1 | 896 | arg1 = SCM_MACRO_CODE (arg1); |
80ea260c MD |
897 | goto proc; |
898 | } | |
899 | } | |
6dbd0af5 | 900 | #endif |
86d31dfe MV |
901 | arg1 = scm_sym2var (proc, scm_env_top_level (env), SCM_BOOL_T); |
902 | SCM_VARIABLE_SET (arg1, x); | |
0f2d19dd | 903 | #ifdef SICP |
86d31dfe | 904 | return scm_cons2 (scm_sym_quote, proc, SCM_EOL); |
0f2d19dd JB |
905 | #else |
906 | return SCM_UNSPECIFIED; | |
907 | #endif | |
908 | } | |
909 | return scm_cons2 (SCM_IM_DEFINE, proc, x); | |
910 | } | |
6dbd0af5 | 911 | |
0f2d19dd JB |
912 | /* end of acros */ |
913 | ||
26d5b9b4 | 914 | static SCM |
e81d98ec | 915 | scm_m_letrec1 (SCM op, SCM imm, SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd JB |
916 | { |
917 | SCM cdrx = SCM_CDR (xorig); /* locally mutable version of form */ | |
3db4adfc | 918 | char *what = SCM_SYMBOL_CHARS (SCM_CAR (xorig)); |
0f2d19dd JB |
919 | SCM x = cdrx, proc, arg1; /* structure traversers */ |
920 | SCM vars = SCM_EOL, inits = SCM_EOL, *initloc = &inits; | |
921 | ||
0f2d19dd | 922 | proc = SCM_CAR (x); |
160bb34a | 923 | SCM_ASSYNT (scm_ilength (proc) >= 1, scm_s_bindings, what); |
0f2d19dd JB |
924 | do |
925 | { | |
926 | /* vars scm_list reversed here, inits reversed at evaluation */ | |
927 | arg1 = SCM_CAR (proc); | |
160bb34a DH |
928 | SCM_ASSYNT (2 == scm_ilength (arg1), scm_s_bindings, what); |
929 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (arg1)), scm_s_variable, what); | |
185ab0ef | 930 | if (scm_c_improper_memq (SCM_CAR (arg1), vars)) |
db4b4ca6 | 931 | scm_misc_error (what, scm_s_duplicate_bindings, SCM_EOL); |
0f2d19dd JB |
932 | vars = scm_cons (SCM_CAR (arg1), vars); |
933 | *initloc = scm_cons (SCM_CAR (SCM_CDR (arg1)), SCM_EOL); | |
a23afe53 | 934 | initloc = SCM_CDRLOC (*initloc); |
0f2d19dd | 935 | } |
ff467021 | 936 | while (SCM_NIMP (proc = SCM_CDR (proc))); |
26d5b9b4 | 937 | |
3a3111a8 MD |
938 | return scm_cons2 (op, vars, |
939 | scm_cons (inits, scm_m_body (imm, SCM_CDR (x), what))); | |
0f2d19dd JB |
940 | } |
941 | ||
26d5b9b4 | 942 | SCM_SYNTAX(s_letrec, "letrec", scm_makmmacro, scm_m_letrec); |
2f0d1375 | 943 | SCM_GLOBAL_SYMBOL(scm_sym_letrec, s_letrec); |
26d5b9b4 MD |
944 | |
945 | SCM | |
6e8d25a6 | 946 | scm_m_letrec (SCM xorig, SCM env) |
26d5b9b4 MD |
947 | { |
948 | SCM x = SCM_CDR (xorig); | |
160bb34a | 949 | SCM_ASSYNT (scm_ilength (x) >= 2, scm_s_body, s_letrec); |
26d5b9b4 MD |
950 | |
951 | if (SCM_NULLP (SCM_CAR (x))) /* null binding, let* faster */ | |
3a3111a8 MD |
952 | return scm_m_letstar (scm_cons2 (SCM_CAR (xorig), SCM_EOL, |
953 | scm_m_body (SCM_IM_LETREC, | |
954 | SCM_CDR (x), | |
955 | s_letrec)), | |
26d5b9b4 MD |
956 | env); |
957 | else | |
958 | return scm_m_letrec1 (SCM_IM_LETREC, SCM_IM_LETREC, xorig, env); | |
959 | } | |
1cc91f1b | 960 | |
b8229a3b | 961 | SCM_SYNTAX(s_let, "let", scm_makmmacro, scm_m_let); |
2f0d1375 | 962 | SCM_GLOBAL_SYMBOL(scm_sym_let, s_let); |
b8229a3b | 963 | |
0f2d19dd | 964 | SCM |
6e8d25a6 | 965 | scm_m_let (SCM xorig, SCM env) |
0f2d19dd JB |
966 | { |
967 | SCM cdrx = SCM_CDR (xorig); /* locally mutable version of form */ | |
968 | SCM x = cdrx, proc, arg1, name; /* structure traversers */ | |
969 | SCM vars = SCM_EOL, inits = SCM_EOL, *varloc = &vars, *initloc = &inits; | |
970 | ||
160bb34a | 971 | SCM_ASSYNT (scm_ilength (x) >= 2, scm_s_body, s_let); |
0f2d19dd JB |
972 | proc = SCM_CAR (x); |
973 | if (SCM_NULLP (proc) | |
0c95b57d | 974 | || (SCM_CONSP (proc) |
26d5b9b4 MD |
975 | && SCM_CONSP (SCM_CAR (proc)) && SCM_NULLP (SCM_CDR (proc)))) |
976 | { | |
977 | /* null or single binding, let* is faster */ | |
3a3111a8 MD |
978 | return scm_m_letstar (scm_cons2 (SCM_CAR (xorig), proc, |
979 | scm_m_body (SCM_IM_LET, | |
980 | SCM_CDR (x), | |
981 | s_let)), | |
26d5b9b4 MD |
982 | env); |
983 | } | |
984 | ||
160bb34a | 985 | SCM_ASSYNT (SCM_NIMP (proc), scm_s_bindings, s_let); |
185ab0ef | 986 | if (SCM_CONSP (proc)) |
26d5b9b4 MD |
987 | { |
988 | /* plain let, proc is <bindings> */ | |
989 | return scm_m_letrec1 (SCM_IM_LET, SCM_IM_LET, xorig, env); | |
990 | } | |
991 | ||
0f2d19dd | 992 | if (!SCM_SYMBOLP (proc)) |
db4b4ca6 | 993 | scm_misc_error (s_let, scm_s_bindings, SCM_EOL); /* bad let */ |
0f2d19dd JB |
994 | name = proc; /* named let, build equiv letrec */ |
995 | x = SCM_CDR (x); | |
160bb34a | 996 | SCM_ASSYNT (scm_ilength (x) >= 2, scm_s_body, s_let); |
26d5b9b4 | 997 | proc = SCM_CAR (x); /* bindings list */ |
160bb34a | 998 | SCM_ASSYNT (scm_ilength (proc) >= 0, scm_s_bindings, s_let); |
ff467021 | 999 | while (SCM_NIMP (proc)) |
0f2d19dd JB |
1000 | { /* vars and inits both in order */ |
1001 | arg1 = SCM_CAR (proc); | |
160bb34a DH |
1002 | SCM_ASSYNT (2 == scm_ilength (arg1), scm_s_bindings, s_let); |
1003 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (arg1)), scm_s_variable, s_let); | |
0f2d19dd | 1004 | *varloc = scm_cons (SCM_CAR (arg1), SCM_EOL); |
a23afe53 | 1005 | varloc = SCM_CDRLOC (*varloc); |
0f2d19dd | 1006 | *initloc = scm_cons (SCM_CAR (SCM_CDR (arg1)), SCM_EOL); |
a23afe53 | 1007 | initloc = SCM_CDRLOC (*initloc); |
0f2d19dd JB |
1008 | proc = SCM_CDR (proc); |
1009 | } | |
26d5b9b4 | 1010 | |
2f0d1375 | 1011 | proc = scm_cons2 (scm_sym_lambda, vars, |
26d5b9b4 | 1012 | scm_m_body (SCM_IM_LET, SCM_CDR (x), "let")); |
2f0d1375 | 1013 | proc = scm_cons2 (scm_sym_let, scm_cons (scm_cons2 (name, proc, SCM_EOL), |
26d5b9b4 MD |
1014 | SCM_EOL), |
1015 | scm_acons (name, inits, SCM_EOL)); | |
1016 | return scm_m_letrec1 (SCM_IM_LETREC, SCM_IM_LET, proc, env); | |
0f2d19dd JB |
1017 | } |
1018 | ||
1019 | ||
81123e6d MD |
1020 | SCM_SYNTAX (s_atapply,"@apply", scm_makmmacro, scm_m_apply); |
1021 | SCM_GLOBAL_SYMBOL (scm_sym_atapply, s_atapply); | |
1022 | SCM_GLOBAL_SYMBOL (scm_sym_apply, s_atapply + 1); | |
1cc91f1b | 1023 | |
0f2d19dd | 1024 | SCM |
e81d98ec | 1025 | scm_m_apply (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 1026 | { |
160bb34a | 1027 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 2, scm_s_expression, s_atapply); |
0f2d19dd JB |
1028 | return scm_cons (SCM_IM_APPLY, SCM_CDR (xorig)); |
1029 | } | |
1030 | ||
b8229a3b MS |
1031 | |
1032 | SCM_SYNTAX(s_atcall_cc,"@call-with-current-continuation", scm_makmmacro, scm_m_cont); | |
2f0d1375 | 1033 | SCM_GLOBAL_SYMBOL(scm_sym_atcall_cc,s_atcall_cc); |
0f2d19dd | 1034 | |
1cc91f1b | 1035 | |
0f2d19dd | 1036 | SCM |
e81d98ec | 1037 | scm_m_cont (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 1038 | { |
6cb702da | 1039 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, |
160bb34a | 1040 | scm_s_expression, s_atcall_cc); |
3a3111a8 | 1041 | return scm_cons (SCM_IM_CONT, SCM_CDR (xorig)); |
0f2d19dd JB |
1042 | } |
1043 | ||
73b64342 MD |
1044 | /* Multi-language support */ |
1045 | ||
86d31dfe | 1046 | SCM_GLOBAL_SYMBOL (scm_lisp_nil, "nil"); |
1385d8ae | 1047 | SCM_GLOBAL_SYMBOL (scm_lisp_t, "t"); |
73b64342 MD |
1048 | |
1049 | SCM_SYNTAX (s_nil_cond, "nil-cond", scm_makmmacro, scm_m_nil_cond); | |
1050 | ||
1051 | SCM | |
e81d98ec | 1052 | scm_m_nil_cond (SCM xorig, SCM env SCM_UNUSED) |
73b64342 | 1053 | { |
c014a02e | 1054 | long len = scm_ilength (SCM_CDR (xorig)); |
160bb34a | 1055 | SCM_ASSYNT (len >= 1 && (len & 1) == 1, scm_s_expression, "nil-cond"); |
73b64342 MD |
1056 | return scm_cons (SCM_IM_NIL_COND, SCM_CDR (xorig)); |
1057 | } | |
1058 | ||
1059 | SCM_SYNTAX (s_nil_ify, "nil-ify", scm_makmmacro, scm_m_nil_ify); | |
1060 | ||
1061 | SCM | |
e81d98ec | 1062 | scm_m_nil_ify (SCM xorig, SCM env SCM_UNUSED) |
73b64342 | 1063 | { |
160bb34a | 1064 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, scm_s_expression, "nil-ify"); |
73b64342 MD |
1065 | return scm_cons (SCM_IM_NIL_IFY, SCM_CDR (xorig)); |
1066 | } | |
1067 | ||
1068 | SCM_SYNTAX (s_t_ify, "t-ify", scm_makmmacro, scm_m_t_ify); | |
1069 | ||
1070 | SCM | |
e81d98ec | 1071 | scm_m_t_ify (SCM xorig, SCM env SCM_UNUSED) |
73b64342 | 1072 | { |
160bb34a | 1073 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, scm_s_expression, "t-ify"); |
73b64342 MD |
1074 | return scm_cons (SCM_IM_T_IFY, SCM_CDR (xorig)); |
1075 | } | |
1076 | ||
1077 | SCM_SYNTAX (s_0_cond, "0-cond", scm_makmmacro, scm_m_0_cond); | |
1078 | ||
1079 | SCM | |
e81d98ec | 1080 | scm_m_0_cond (SCM xorig, SCM env SCM_UNUSED) |
73b64342 | 1081 | { |
c014a02e | 1082 | long len = scm_ilength (SCM_CDR (xorig)); |
160bb34a | 1083 | SCM_ASSYNT (len >= 1 && (len & 1) == 1, scm_s_expression, "0-cond"); |
73b64342 MD |
1084 | return scm_cons (SCM_IM_0_COND, SCM_CDR (xorig)); |
1085 | } | |
1086 | ||
1087 | SCM_SYNTAX (s_0_ify, "0-ify", scm_makmmacro, scm_m_0_ify); | |
1088 | ||
1089 | SCM | |
e81d98ec | 1090 | scm_m_0_ify (SCM xorig, SCM env SCM_UNUSED) |
73b64342 | 1091 | { |
160bb34a | 1092 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, scm_s_expression, "0-ify"); |
73b64342 MD |
1093 | return scm_cons (SCM_IM_0_IFY, SCM_CDR (xorig)); |
1094 | } | |
1095 | ||
1096 | SCM_SYNTAX (s_1_ify, "1-ify", scm_makmmacro, scm_m_1_ify); | |
1097 | ||
1098 | SCM | |
e81d98ec | 1099 | scm_m_1_ify (SCM xorig, SCM env SCM_UNUSED) |
73b64342 | 1100 | { |
160bb34a | 1101 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, scm_s_expression, "1-ify"); |
73b64342 MD |
1102 | return scm_cons (SCM_IM_1_IFY, SCM_CDR (xorig)); |
1103 | } | |
1104 | ||
1105 | SCM_SYNTAX (s_atfop, "@fop", scm_makmmacro, scm_m_atfop); | |
1106 | ||
1107 | SCM | |
e81d98ec | 1108 | scm_m_atfop (SCM xorig, SCM env SCM_UNUSED) |
73b64342 | 1109 | { |
86d31dfe | 1110 | SCM x = SCM_CDR (xorig), var; |
160bb34a | 1111 | SCM_ASSYNT (scm_ilength (x) >= 1, scm_s_expression, "@fop"); |
86d31dfe MV |
1112 | var = scm_symbol_fref (SCM_CAR (x)); |
1113 | SCM_ASSYNT (SCM_VARIABLEP (var), | |
73b64342 | 1114 | "Symbol's function definition is void", NULL); |
86d31dfe | 1115 | SCM_SET_CELL_WORD_0 (x, SCM_UNPACK (var) + scm_tc3_cons_gloc); |
73b64342 MD |
1116 | return x; |
1117 | } | |
1118 | ||
1119 | SCM_SYNTAX (s_atbind, "@bind", scm_makmmacro, scm_m_atbind); | |
1120 | ||
1121 | SCM | |
1122 | scm_m_atbind (SCM xorig, SCM env) | |
1123 | { | |
1124 | SCM x = SCM_CDR (xorig); | |
160bb34a | 1125 | SCM_ASSYNT (scm_ilength (x) > 1, scm_s_expression, "@bind"); |
73b64342 MD |
1126 | |
1127 | if (SCM_IMP (env)) | |
1128 | env = SCM_BOOL_F; | |
1129 | else | |
1130 | { | |
1131 | while (SCM_NIMP (SCM_CDR (env))) | |
1132 | env = SCM_CDR (env); | |
1133 | env = SCM_CAR (env); | |
1134 | if (SCM_CONSP (env)) | |
1135 | env = SCM_BOOL_F; | |
1136 | } | |
1137 | ||
1138 | x = SCM_CAR (x); | |
1139 | while (SCM_NIMP (x)) | |
1140 | { | |
86d31dfe | 1141 | SCM_SET_CELL_WORD_0 (x, SCM_UNPACK (scm_sym2var (SCM_CAR (x), env, SCM_BOOL_T)) + scm_tc3_cons_gloc); |
73b64342 MD |
1142 | x = SCM_CDR (x); |
1143 | } | |
1144 | return scm_cons (SCM_IM_BIND, SCM_CDR (xorig)); | |
1145 | } | |
73b64342 | 1146 | |
a513ead3 MV |
1147 | SCM_SYNTAX (s_at_call_with_values, "@call-with-values", scm_makmmacro, scm_m_at_call_with_values); |
1148 | SCM_GLOBAL_SYMBOL(scm_sym_at_call_with_values, s_at_call_with_values); | |
1149 | ||
1150 | SCM | |
e81d98ec | 1151 | scm_m_at_call_with_values (SCM xorig, SCM env SCM_UNUSED) |
a513ead3 MV |
1152 | { |
1153 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 2, | |
1154 | scm_s_expression, s_at_call_with_values); | |
1155 | return scm_cons (SCM_IM_CALL_WITH_VALUES, SCM_CDR (xorig)); | |
1156 | } | |
1157 | ||
26d5b9b4 MD |
1158 | SCM |
1159 | scm_m_expand_body (SCM xorig, SCM env) | |
1160 | { | |
22a52da1 | 1161 | SCM x = SCM_CDR (xorig), defs = SCM_EOL; |
26d5b9b4 MD |
1162 | char *what = SCM_ISYMCHARS (SCM_CAR (xorig)) + 2; |
1163 | ||
1164 | while (SCM_NIMP (x)) | |
1165 | { | |
22a52da1 DH |
1166 | SCM form = SCM_CAR (x); |
1167 | if (!SCM_CONSP (form)) | |
26d5b9b4 MD |
1168 | break; |
1169 | if (!SCM_SYMBOLP (SCM_CAR (form))) | |
1170 | break; | |
22a52da1 | 1171 | |
3a3111a8 MD |
1172 | form = scm_macroexp (scm_cons_source (form, |
1173 | SCM_CAR (form), | |
1174 | SCM_CDR (form)), | |
1175 | env); | |
26d5b9b4 | 1176 | |
cf498326 | 1177 | if (SCM_EQ_P (SCM_IM_DEFINE, SCM_CAR (form))) |
26d5b9b4 MD |
1178 | { |
1179 | defs = scm_cons (SCM_CDR (form), defs); | |
22a52da1 | 1180 | x = SCM_CDR (x); |
26d5b9b4 | 1181 | } |
22a52da1 | 1182 | else if (!SCM_IMP (defs)) |
26d5b9b4 MD |
1183 | { |
1184 | break; | |
1185 | } | |
cf498326 | 1186 | else if (SCM_EQ_P (SCM_IM_BEGIN, SCM_CAR (form))) |
26d5b9b4 MD |
1187 | { |
1188 | x = scm_append (scm_cons2 (SCM_CDR (form), SCM_CDR (x), SCM_EOL)); | |
1189 | } | |
1190 | else | |
1191 | { | |
22a52da1 | 1192 | x = scm_cons (form, SCM_CDR (x)); |
26d5b9b4 MD |
1193 | break; |
1194 | } | |
1195 | } | |
1196 | ||
160bb34a | 1197 | SCM_ASSYNT (SCM_NIMP (x), scm_s_body, what); |
26d5b9b4 MD |
1198 | if (SCM_NIMP (defs)) |
1199 | { | |
1200 | x = scm_cons (scm_m_letrec1 (SCM_IM_LETREC, | |
1201 | SCM_IM_DEFINE, | |
2f0d1375 | 1202 | scm_cons2 (scm_sym_define, defs, x), |
26d5b9b4 MD |
1203 | env), |
1204 | SCM_EOL); | |
1205 | } | |
1206 | ||
1207 | SCM_DEFER_INTS; | |
1208 | SCM_SETCAR (xorig, SCM_CAR (x)); | |
1209 | SCM_SETCDR (xorig, SCM_CDR (x)); | |
1210 | SCM_ALLOW_INTS; | |
1211 | ||
1212 | return xorig; | |
1213 | } | |
1214 | ||
1215 | SCM | |
1216 | scm_macroexp (SCM x, SCM env) | |
1217 | { | |
86d31dfe | 1218 | SCM res, proc, orig_sym; |
26d5b9b4 MD |
1219 | |
1220 | /* Don't bother to produce error messages here. We get them when we | |
1221 | eventually execute the code for real. */ | |
1222 | ||
1223 | macro_tail: | |
86d31dfe MV |
1224 | orig_sym = SCM_CAR (x); |
1225 | if (!SCM_SYMBOLP (orig_sym)) | |
26d5b9b4 MD |
1226 | return x; |
1227 | ||
1228 | #ifdef USE_THREADS | |
1229 | { | |
1230 | SCM *proc_ptr = scm_lookupcar1 (x, env, 0); | |
1231 | if (proc_ptr == NULL) | |
1232 | { | |
1233 | /* We have lost the race. */ | |
1234 | goto macro_tail; | |
1235 | } | |
1236 | proc = *proc_ptr; | |
1237 | } | |
1238 | #else | |
1239 | proc = *scm_lookupcar (x, env, 0); | |
1240 | #endif | |
1241 | ||
1242 | /* Only handle memoizing macros. `Acros' and `macros' are really | |
1243 | special forms and should not be evaluated here. */ | |
1244 | ||
22a52da1 | 1245 | if (!SCM_MACROP (proc) || SCM_MACRO_TYPE (proc) != 2) |
26d5b9b4 MD |
1246 | return x; |
1247 | ||
86d31dfe | 1248 | SCM_SETCAR (x, orig_sym); /* Undo memoizing effect of lookupcar */ |
fdc28395 | 1249 | res = scm_call_2 (SCM_MACRO_CODE (proc), x, env); |
26d5b9b4 MD |
1250 | |
1251 | if (scm_ilength (res) <= 0) | |
1252 | res = scm_cons2 (SCM_IM_BEGIN, res, SCM_EOL); | |
1253 | ||
26d5b9b4 MD |
1254 | SCM_DEFER_INTS; |
1255 | SCM_SETCAR (x, SCM_CAR (res)); | |
1256 | SCM_SETCDR (x, SCM_CDR (res)); | |
1257 | SCM_ALLOW_INTS; | |
1258 | ||
1259 | goto macro_tail; | |
1260 | } | |
73b64342 | 1261 | |
6dbd0af5 MD |
1262 | /* scm_unmemocopy takes a memoized expression together with its |
1263 | * environment and rewrites it to its original form. Thus, it is the | |
1264 | * inversion of the rewrite rules above. The procedure is not | |
1265 | * optimized for speed. It's used in scm_iprin1 when printing the | |
220ff1eb MD |
1266 | * code of a closure, in scm_procedure_source, in display_frame when |
1267 | * generating the source for a stackframe in a backtrace, and in | |
1268 | * display_expression. | |
86d31dfe MV |
1269 | * |
1270 | * Unmemoizing is not a realiable process. You can not in general | |
1271 | * expect to get the original source back. | |
1272 | * | |
1273 | * However, GOOPS currently relies on this for method compilation. | |
1274 | * This ought to change. | |
26d5b9b4 MD |
1275 | */ |
1276 | ||
f1267706 | 1277 | #define SCM_BIT8(x) (127 & SCM_UNPACK (x)) |
c209c88e | 1278 | |
6dbd0af5 | 1279 | static SCM |
1bbd0b84 | 1280 | unmemocopy (SCM x, SCM env) |
6dbd0af5 MD |
1281 | { |
1282 | SCM ls, z; | |
1283 | #ifdef DEBUG_EXTENSIONS | |
1284 | SCM p; | |
1285 | #endif | |
1286 | if (SCM_NCELLP (x) || SCM_NECONSP (x)) | |
1287 | return x; | |
1288 | #ifdef DEBUG_EXTENSIONS | |
1289 | p = scm_whash_lookup (scm_source_whash, x); | |
1290 | #endif | |
1291 | switch (SCM_TYP7 (x)) | |
1292 | { | |
c209c88e | 1293 | case SCM_BIT8(SCM_IM_AND): |
2f0d1375 | 1294 | ls = z = scm_cons (scm_sym_and, SCM_UNSPECIFIED); |
6dbd0af5 | 1295 | break; |
c209c88e | 1296 | case SCM_BIT8(SCM_IM_BEGIN): |
2f0d1375 | 1297 | ls = z = scm_cons (scm_sym_begin, SCM_UNSPECIFIED); |
6dbd0af5 | 1298 | break; |
c209c88e | 1299 | case SCM_BIT8(SCM_IM_CASE): |
2f0d1375 | 1300 | ls = z = scm_cons (scm_sym_case, SCM_UNSPECIFIED); |
6dbd0af5 | 1301 | break; |
c209c88e | 1302 | case SCM_BIT8(SCM_IM_COND): |
2f0d1375 | 1303 | ls = z = scm_cons (scm_sym_cond, SCM_UNSPECIFIED); |
6dbd0af5 | 1304 | break; |
c209c88e | 1305 | case SCM_BIT8(SCM_IM_DO): |
2f0d1375 | 1306 | ls = scm_cons (scm_sym_do, SCM_UNSPECIFIED); |
6dbd0af5 | 1307 | goto transform; |
c209c88e | 1308 | case SCM_BIT8(SCM_IM_IF): |
2f0d1375 | 1309 | ls = z = scm_cons (scm_sym_if, SCM_UNSPECIFIED); |
6dbd0af5 | 1310 | break; |
c209c88e | 1311 | case SCM_BIT8(SCM_IM_LET): |
2f0d1375 | 1312 | ls = scm_cons (scm_sym_let, SCM_UNSPECIFIED); |
6dbd0af5 | 1313 | goto transform; |
c209c88e | 1314 | case SCM_BIT8(SCM_IM_LETREC): |
6dbd0af5 MD |
1315 | { |
1316 | SCM f, v, e, s; | |
2f0d1375 | 1317 | ls = scm_cons (scm_sym_letrec, SCM_UNSPECIFIED); |
6dbd0af5 MD |
1318 | transform: |
1319 | x = SCM_CDR (x); | |
26d5b9b4 | 1320 | /* binding names */ |
6dbd0af5 MD |
1321 | f = v = SCM_CAR (x); |
1322 | x = SCM_CDR (x); | |
e2806c10 | 1323 | z = EXTEND_ENV (f, SCM_EOL, env); |
26d5b9b4 | 1324 | /* inits */ |
6dbd0af5 | 1325 | e = scm_reverse (unmemocopy (SCM_CAR (x), |
cf498326 | 1326 | SCM_EQ_P (SCM_CAR (ls), scm_sym_letrec) ? z : env)); |
6dbd0af5 | 1327 | env = z; |
26d5b9b4 | 1328 | /* increments */ |
cf498326 | 1329 | s = SCM_EQ_P (SCM_CAR (ls), scm_sym_do) |
6dbd0af5 MD |
1330 | ? scm_reverse (unmemocopy (SCM_CDR (SCM_CDR (SCM_CDR (x))), env)) |
1331 | : f; | |
26d5b9b4 | 1332 | /* build transformed binding list */ |
6dbd0af5 | 1333 | z = SCM_EOL; |
1bd07992 | 1334 | while (SCM_NIMP (v)) |
6dbd0af5 MD |
1335 | { |
1336 | z = scm_acons (SCM_CAR (v), | |
1337 | scm_cons (SCM_CAR (e), | |
cf498326 | 1338 | SCM_EQ_P (SCM_CAR (s), SCM_CAR (v)) |
6dbd0af5 MD |
1339 | ? SCM_EOL |
1340 | : scm_cons (SCM_CAR (s), SCM_EOL)), | |
1341 | z); | |
1342 | v = SCM_CDR (v); | |
1343 | e = SCM_CDR (e); | |
1344 | s = SCM_CDR (s); | |
1345 | } | |
a23afe53 MD |
1346 | z = scm_cons (z, SCM_UNSPECIFIED); |
1347 | SCM_SETCDR (ls, z); | |
cf498326 | 1348 | if (SCM_EQ_P (SCM_CAR (ls), scm_sym_do)) |
6dbd0af5 MD |
1349 | { |
1350 | x = SCM_CDR (x); | |
26d5b9b4 | 1351 | /* test clause */ |
a23afe53 | 1352 | SCM_SETCDR (z, scm_cons (unmemocopy (SCM_CAR (x), env), |
6dbd0af5 | 1353 | SCM_UNSPECIFIED)); |
a23afe53 MD |
1354 | z = SCM_CDR (z); |
1355 | x = (SCM) (SCM_CARLOC (SCM_CDR (x)) - 1); | |
26d5b9b4 MD |
1356 | /* body forms are now to be found in SCM_CDR (x) |
1357 | (this is how *real* code look like! :) */ | |
6dbd0af5 MD |
1358 | } |
1359 | break; | |
1360 | } | |
c209c88e | 1361 | case SCM_BIT8(SCM_IM_LETSTAR): |
6dbd0af5 MD |
1362 | { |
1363 | SCM b, y; | |
1364 | x = SCM_CDR (x); | |
1365 | b = SCM_CAR (x); | |
1366 | y = SCM_EOL; | |
1367 | if SCM_IMP (b) | |
1368 | { | |
e2806c10 | 1369 | env = EXTEND_ENV (SCM_EOL, SCM_EOL, env); |
6dbd0af5 MD |
1370 | goto letstar; |
1371 | } | |
1372 | y = z = scm_acons (SCM_CAR (b), | |
1373 | unmemocar ( | |
1374 | scm_cons (unmemocopy (SCM_CAR (SCM_CDR (b)), env), SCM_EOL), env), | |
1375 | SCM_UNSPECIFIED); | |
e2806c10 | 1376 | env = EXTEND_ENV (SCM_CAR (b), SCM_BOOL_F, env); |
6dbd0af5 MD |
1377 | b = SCM_CDR (SCM_CDR (b)); |
1378 | if (SCM_IMP (b)) | |
1379 | { | |
1380 | SCM_SETCDR (y, SCM_EOL); | |
2f0d1375 | 1381 | ls = scm_cons (scm_sym_let, z = scm_cons (y, SCM_UNSPECIFIED)); |
6dbd0af5 MD |
1382 | break; |
1383 | } | |
1384 | do | |
1385 | { | |
a23afe53 MD |
1386 | SCM_SETCDR (z, scm_acons (SCM_CAR (b), |
1387 | unmemocar ( | |
6dbd0af5 | 1388 | scm_cons (unmemocopy (SCM_CAR (SCM_CDR (b)), env), SCM_EOL), env), |
a23afe53 MD |
1389 | SCM_UNSPECIFIED)); |
1390 | z = SCM_CDR (z); | |
e2806c10 | 1391 | env = EXTEND_ENV (SCM_CAR (b), SCM_BOOL_F, env); |
6dbd0af5 MD |
1392 | b = SCM_CDR (SCM_CDR (b)); |
1393 | } | |
ff467021 | 1394 | while (SCM_NIMP (b)); |
a23afe53 | 1395 | SCM_SETCDR (z, SCM_EOL); |
6dbd0af5 | 1396 | letstar: |
2f0d1375 | 1397 | ls = scm_cons (scm_sym_letstar, z = scm_cons (y, SCM_UNSPECIFIED)); |
6dbd0af5 MD |
1398 | break; |
1399 | } | |
c209c88e | 1400 | case SCM_BIT8(SCM_IM_OR): |
2f0d1375 | 1401 | ls = z = scm_cons (scm_sym_or, SCM_UNSPECIFIED); |
6dbd0af5 | 1402 | break; |
c209c88e | 1403 | case SCM_BIT8(SCM_IM_LAMBDA): |
6dbd0af5 | 1404 | x = SCM_CDR (x); |
2f0d1375 | 1405 | ls = scm_cons (scm_sym_lambda, |
6dbd0af5 | 1406 | z = scm_cons (SCM_CAR (x), SCM_UNSPECIFIED)); |
e2806c10 | 1407 | env = EXTEND_ENV (SCM_CAR (x), SCM_EOL, env); |
6dbd0af5 | 1408 | break; |
c209c88e | 1409 | case SCM_BIT8(SCM_IM_QUOTE): |
2f0d1375 | 1410 | ls = z = scm_cons (scm_sym_quote, SCM_UNSPECIFIED); |
6dbd0af5 | 1411 | break; |
c209c88e | 1412 | case SCM_BIT8(SCM_IM_SET_X): |
89efbff4 | 1413 | ls = z = scm_cons (scm_sym_set_x, SCM_UNSPECIFIED); |
6dbd0af5 | 1414 | break; |
c209c88e | 1415 | case SCM_BIT8(SCM_IM_DEFINE): |
6dbd0af5 MD |
1416 | { |
1417 | SCM n; | |
1418 | x = SCM_CDR (x); | |
2f0d1375 | 1419 | ls = scm_cons (scm_sym_define, |
6dbd0af5 MD |
1420 | z = scm_cons (n = SCM_CAR (x), SCM_UNSPECIFIED)); |
1421 | if (SCM_NNULLP (env)) | |
a23afe53 | 1422 | SCM_SETCAR (SCM_CAR (env), scm_cons (n, SCM_CAR (SCM_CAR (env)))); |
6dbd0af5 MD |
1423 | break; |
1424 | } | |
c209c88e | 1425 | case SCM_BIT8(SCM_MAKISYM (0)): |
6dbd0af5 MD |
1426 | z = SCM_CAR (x); |
1427 | if (!SCM_ISYMP (z)) | |
1428 | goto unmemo; | |
ff467021 | 1429 | switch (SCM_ISYMNUM (z)) |
6dbd0af5 MD |
1430 | { |
1431 | case (SCM_ISYMNUM (SCM_IM_APPLY)): | |
2f0d1375 | 1432 | ls = z = scm_cons (scm_sym_atapply, SCM_UNSPECIFIED); |
6dbd0af5 MD |
1433 | goto loop; |
1434 | case (SCM_ISYMNUM (SCM_IM_CONT)): | |
2f0d1375 | 1435 | ls = z = scm_cons (scm_sym_atcall_cc, SCM_UNSPECIFIED); |
6dbd0af5 | 1436 | goto loop; |
a570e93a MD |
1437 | case (SCM_ISYMNUM (SCM_IM_DELAY)): |
1438 | ls = z = scm_cons (scm_sym_delay, SCM_UNSPECIFIED); | |
1439 | x = SCM_CDR (x); | |
1440 | goto loop; | |
a513ead3 MV |
1441 | case (SCM_ISYMNUM (SCM_IM_CALL_WITH_VALUES)): |
1442 | ls = z = scm_cons (scm_sym_at_call_with_values, SCM_UNSPECIFIED); | |
1443 | goto loop; | |
6dbd0af5 | 1444 | default: |
fa888178 | 1445 | /* appease the Sun compiler god: */ ; |
6dbd0af5 MD |
1446 | } |
1447 | unmemo: | |
1448 | default: | |
1449 | ls = z = unmemocar (scm_cons (unmemocopy (SCM_CAR (x), env), | |
1450 | SCM_UNSPECIFIED), | |
1451 | env); | |
1452 | } | |
1453 | loop: | |
1454 | while (SCM_CELLP (x = SCM_CDR (x)) && SCM_ECONSP (x)) | |
a23afe53 | 1455 | { |
44d3cb0d | 1456 | if (SCM_ISYMP (SCM_CAR (x))) |
26d5b9b4 MD |
1457 | /* skip body markers */ |
1458 | continue; | |
a23afe53 MD |
1459 | SCM_SETCDR (z, unmemocar (scm_cons (unmemocopy (SCM_CAR (x), env), |
1460 | SCM_UNSPECIFIED), | |
1461 | env)); | |
1462 | z = SCM_CDR (z); | |
1463 | } | |
1464 | SCM_SETCDR (z, x); | |
6dbd0af5 MD |
1465 | #ifdef DEBUG_EXTENSIONS |
1466 | if (SCM_NFALSEP (p)) | |
1467 | scm_whash_insert (scm_source_whash, ls, p); | |
1468 | #endif | |
1469 | return ls; | |
1470 | } | |
1471 | ||
1cc91f1b | 1472 | |
6dbd0af5 | 1473 | SCM |
6e8d25a6 | 1474 | scm_unmemocopy (SCM x, SCM env) |
6dbd0af5 MD |
1475 | { |
1476 | if (SCM_NNULLP (env)) | |
1477 | /* Make a copy of the lowest frame to protect it from | |
1478 | modifications by SCM_IM_DEFINE */ | |
1479 | return unmemocopy (x, scm_cons (SCM_CAR (env), SCM_CDR (env))); | |
1480 | else | |
1481 | return unmemocopy (x, env); | |
1482 | } | |
1483 | ||
cf7c17e9 | 1484 | #ifndef SCM_RECKLESS |
1cc91f1b | 1485 | |
0f2d19dd | 1486 | int |
6e8d25a6 | 1487 | scm_badargsp (SCM formals, SCM args) |
0f2d19dd | 1488 | { |
ff467021 | 1489 | while (SCM_NIMP (formals)) |
0f2d19dd | 1490 | { |
ff467021 JB |
1491 | if (SCM_NCONSP (formals)) |
1492 | return 0; | |
1493 | if (SCM_IMP(args)) | |
1494 | return 1; | |
0f2d19dd JB |
1495 | formals = SCM_CDR (formals); |
1496 | args = SCM_CDR (args); | |
1497 | } | |
1498 | return SCM_NNULLP (args) ? 1 : 0; | |
1499 | } | |
1500 | #endif | |
1501 | ||
002f1a5d MD |
1502 | static int |
1503 | scm_badformalsp (SCM closure, int n) | |
1504 | { | |
726d810a DH |
1505 | SCM formals = SCM_CLOSURE_FORMALS (closure); |
1506 | while (!SCM_NULLP (formals)) | |
002f1a5d | 1507 | { |
726d810a | 1508 | if (!SCM_CONSP (formals)) |
002f1a5d MD |
1509 | return 0; |
1510 | if (n == 0) | |
1511 | return 1; | |
1512 | --n; | |
1513 | formals = SCM_CDR (formals); | |
1514 | } | |
1515 | return n; | |
1516 | } | |
0f2d19dd JB |
1517 | |
1518 | \f | |
6dbd0af5 | 1519 | SCM |
6e8d25a6 | 1520 | scm_eval_args (SCM l, SCM env, SCM proc) |
6dbd0af5 | 1521 | { |
680ed4a8 | 1522 | SCM results = SCM_EOL, *lloc = &results, res; |
22a52da1 | 1523 | while (!SCM_IMP (l)) |
6dbd0af5 | 1524 | { |
cf7c17e9 | 1525 | #ifdef SCM_CAUTIOUS |
44d3cb0d | 1526 | if (SCM_CONSP (l)) |
680ed4a8 MD |
1527 | { |
1528 | if (SCM_IMP (SCM_CAR (l))) | |
6cb702da | 1529 | res = SCM_EVALIM (SCM_CAR (l), env); |
680ed4a8 MD |
1530 | else |
1531 | res = EVALCELLCAR (l, env); | |
1532 | } | |
3201d763 | 1533 | else if (SCM_TYP3 (l) == scm_tc3_cons_gloc) |
680ed4a8 | 1534 | { |
92c2555f | 1535 | scm_t_bits vcell = |
86d31dfe | 1536 | SCM_STRUCT_VTABLE_DATA (l) [scm_vtable_index_vcell]; |
3201d763 | 1537 | if (vcell == 0) |
680ed4a8 | 1538 | res = SCM_CAR (l); /* struct planted in code */ |
3201d763 | 1539 | else |
86d31dfe | 1540 | res = SCM_GLOC_VAL (SCM_CAR (l)); |
680ed4a8 MD |
1541 | } |
1542 | else | |
1543 | goto wrongnumargs; | |
1544 | #else | |
1545 | res = EVALCAR (l, env); | |
1546 | #endif | |
1547 | *lloc = scm_cons (res, SCM_EOL); | |
a23afe53 | 1548 | lloc = SCM_CDRLOC (*lloc); |
6dbd0af5 MD |
1549 | l = SCM_CDR (l); |
1550 | } | |
cf7c17e9 | 1551 | #ifdef SCM_CAUTIOUS |
22a52da1 | 1552 | if (!SCM_NULLP (l)) |
680ed4a8 MD |
1553 | { |
1554 | wrongnumargs: | |
1555 | scm_wrong_num_args (proc); | |
1556 | } | |
1557 | #endif | |
1558 | return results; | |
6dbd0af5 | 1559 | } |
c4ac4d88 | 1560 | |
9de33deb MD |
1561 | SCM |
1562 | scm_eval_body (SCM code, SCM env) | |
1563 | { | |
1564 | SCM next; | |
1565 | again: | |
1566 | next = code; | |
1567 | while (SCM_NNULLP (next = SCM_CDR (next))) | |
1568 | { | |
1569 | if (SCM_IMP (SCM_CAR (code))) | |
1570 | { | |
1571 | if (SCM_ISYMP (SCM_CAR (code))) | |
1572 | { | |
1573 | code = scm_m_expand_body (code, env); | |
1574 | goto again; | |
1575 | } | |
1576 | } | |
1577 | else | |
1578 | SCM_XEVAL (SCM_CAR (code), env); | |
1579 | code = next; | |
1580 | } | |
1581 | return SCM_XEVALCAR (code, env); | |
1582 | } | |
1583 | ||
c4ac4d88 | 1584 | |
0f2d19dd JB |
1585 | #endif /* !DEVAL */ |
1586 | ||
6dbd0af5 MD |
1587 | |
1588 | /* SECTION: This code is specific for the debugging support. One | |
1589 | * branch is read when DEVAL isn't defined, the other when DEVAL is | |
1590 | * defined. | |
1591 | */ | |
1592 | ||
1593 | #ifndef DEVAL | |
1594 | ||
1595 | #define SCM_APPLY scm_apply | |
1596 | #define PREP_APPLY(proc, args) | |
1597 | #define ENTER_APPLY | |
1598 | #define RETURN(x) return x; | |
b7ff98dd MD |
1599 | #ifdef STACK_CHECKING |
1600 | #ifndef NO_CEVAL_STACK_CHECKING | |
1601 | #define EVAL_STACK_CHECKING | |
1602 | #endif | |
6dbd0af5 MD |
1603 | #endif |
1604 | ||
1605 | #else /* !DEVAL */ | |
1606 | ||
0f2d19dd JB |
1607 | #undef SCM_CEVAL |
1608 | #define SCM_CEVAL scm_deval /* Substitute all uses of scm_ceval */ | |
1609 | #undef SCM_APPLY | |
1610 | #define SCM_APPLY scm_dapply | |
6dbd0af5 MD |
1611 | #undef PREP_APPLY |
1612 | #define PREP_APPLY(p, l) \ | |
1613 | { ++debug.info; debug.info->a.proc = p; debug.info->a.args = l; } | |
1614 | #undef ENTER_APPLY | |
1615 | #define ENTER_APPLY \ | |
d3a6bc94 | 1616 | do { \ |
b7ff98dd | 1617 | SCM_SET_ARGSREADY (debug);\ |
b6d75948 | 1618 | if (CHECK_APPLY && SCM_TRAPS_P)\ |
b7ff98dd | 1619 | if (SCM_APPLY_FRAME_P || (SCM_TRACE_P && PROCTRACEP (proc)))\ |
6dbd0af5 | 1620 | {\ |
156dcb09 | 1621 | SCM tmp, tail = SCM_BOOL(SCM_TRACED_FRAME_P (debug)); \ |
c6a4fbce | 1622 | SCM_SET_TRACED_FRAME (debug); \ |
d95c0b76 | 1623 | SCM_TRAPS_P = 0;\ |
b7ff98dd | 1624 | if (SCM_CHEAPTRAPS_P)\ |
6dbd0af5 | 1625 | {\ |
c0ab1b8d | 1626 | tmp = scm_make_debugobj (&debug);\ |
d95c0b76 | 1627 | scm_call_3 (SCM_APPLY_FRAME_HDLR, scm_sym_apply_frame, tmp, tail);\ |
b6d75948 | 1628 | }\ |
6dbd0af5 MD |
1629 | else\ |
1630 | {\ | |
5f144b10 GH |
1631 | int first;\ |
1632 | tmp = scm_make_continuation (&first);\ | |
1633 | if (first)\ | |
d95c0b76 | 1634 | scm_call_3 (SCM_APPLY_FRAME_HDLR, scm_sym_apply_frame, tmp, tail);\ |
6dbd0af5 | 1635 | }\ |
d95c0b76 | 1636 | SCM_TRAPS_P = 1;\ |
6dbd0af5 | 1637 | }\ |
d3a6bc94 | 1638 | } while (0) |
0f2d19dd JB |
1639 | #undef RETURN |
1640 | #define RETURN(e) {proc = (e); goto exit;} | |
b7ff98dd MD |
1641 | #ifdef STACK_CHECKING |
1642 | #ifndef EVAL_STACK_CHECKING | |
1643 | #define EVAL_STACK_CHECKING | |
1644 | #endif | |
6dbd0af5 MD |
1645 | #endif |
1646 | ||
1647 | /* scm_ceval_ptr points to the currently selected evaluator. | |
1648 | * *fixme*: Although efficiency is important here, this state variable | |
1649 | * should probably not be a global. It should be related to the | |
1650 | * current repl. | |
1651 | */ | |
1652 | ||
1cc91f1b | 1653 | |
1bbd0b84 | 1654 | SCM (*scm_ceval_ptr) (SCM x, SCM env); |
0f2d19dd | 1655 | |
1646d37b | 1656 | /* scm_last_debug_frame contains a pointer to the last debugging |
6dbd0af5 MD |
1657 | * information stack frame. It is accessed very often from the |
1658 | * debugging evaluator, so it should probably not be indirectly | |
1659 | * addressed. Better to save and restore it from the current root at | |
1660 | * any stack swaps. | |
1661 | */ | |
1662 | ||
1646d37b | 1663 | #ifndef USE_THREADS |
92c2555f | 1664 | scm_t_debug_frame *scm_last_debug_frame; |
1646d37b | 1665 | #endif |
6dbd0af5 MD |
1666 | |
1667 | /* scm_debug_eframe_size is the number of slots available for pseudo | |
1668 | * stack frames at each real stack frame. | |
1669 | */ | |
1670 | ||
c014a02e | 1671 | long scm_debug_eframe_size; |
6dbd0af5 | 1672 | |
b7ff98dd | 1673 | int scm_debug_mode, scm_check_entry_p, scm_check_apply_p, scm_check_exit_p; |
6dbd0af5 | 1674 | |
c014a02e | 1675 | long scm_eval_stack; |
a74145b8 | 1676 | |
92c2555f | 1677 | scm_t_option scm_eval_opts[] = { |
a74145b8 | 1678 | { SCM_OPTION_INTEGER, "stack", 22000, "Size of thread stacks (in machine words)." } |
33b97402 MD |
1679 | }; |
1680 | ||
92c2555f | 1681 | scm_t_option scm_debug_opts[] = { |
b7ff98dd MD |
1682 | { SCM_OPTION_BOOLEAN, "cheap", 1, |
1683 | "*Flyweight representation of the stack at traps." }, | |
1684 | { SCM_OPTION_BOOLEAN, "breakpoints", 0, "*Check for breakpoints." }, | |
1685 | { SCM_OPTION_BOOLEAN, "trace", 0, "*Trace mode." }, | |
1686 | { SCM_OPTION_BOOLEAN, "procnames", 1, | |
1687 | "Record procedure names at definition." }, | |
1688 | { SCM_OPTION_BOOLEAN, "backwards", 0, | |
1689 | "Display backtrace in anti-chronological order." }, | |
274dc5fd | 1690 | { SCM_OPTION_INTEGER, "width", 79, "Maximal width of backtrace." }, |
4e646a03 MD |
1691 | { SCM_OPTION_INTEGER, "indent", 10, "Maximal indentation in backtrace." }, |
1692 | { SCM_OPTION_INTEGER, "frames", 3, | |
b7ff98dd | 1693 | "Maximum number of tail-recursive frames in backtrace." }, |
4e646a03 MD |
1694 | { SCM_OPTION_INTEGER, "maxdepth", 1000, |
1695 | "Maximal number of stored backtrace frames." }, | |
1696 | { SCM_OPTION_INTEGER, "depth", 20, "Maximal length of printed backtrace." }, | |
11f77bfc MD |
1697 | { SCM_OPTION_BOOLEAN, "backtrace", 0, "Show backtrace on error." }, |
1698 | { SCM_OPTION_BOOLEAN, "debug", 0, "Use the debugging evaluator." }, | |
863e833b | 1699 | { SCM_OPTION_INTEGER, "stack", 20000, "Stack size limit (measured in words; 0 = no check)." }, |
d95c0b76 | 1700 | { SCM_OPTION_SCM, "show-file-name", (unsigned long)SCM_BOOL_T, "Show file names and line numbers in backtraces when not `#f'. A value of `base' displays only base names, while `#t' displays full names."} |
6dbd0af5 MD |
1701 | }; |
1702 | ||
92c2555f | 1703 | scm_t_option scm_evaluator_trap_table[] = { |
b6d75948 | 1704 | { SCM_OPTION_BOOLEAN, "traps", 0, "Enable evaluator traps." }, |
b7ff98dd MD |
1705 | { SCM_OPTION_BOOLEAN, "enter-frame", 0, "Trap when eval enters new frame." }, |
1706 | { SCM_OPTION_BOOLEAN, "apply-frame", 0, "Trap when entering apply." }, | |
d95c0b76 NJ |
1707 | { SCM_OPTION_BOOLEAN, "exit-frame", 0, "Trap when exiting eval or apply." }, |
1708 | { SCM_OPTION_SCM, "enter-frame-handler", (unsigned long)SCM_BOOL_F, "Handler for enter-frame traps." }, | |
1709 | { SCM_OPTION_SCM, "apply-frame-handler", (unsigned long)SCM_BOOL_F, "Handler for apply-frame traps." }, | |
1710 | { SCM_OPTION_SCM, "exit-frame-handler", (unsigned long)SCM_BOOL_F, "Handler for exit-frame traps." } | |
6dbd0af5 MD |
1711 | }; |
1712 | ||
a1ec6916 | 1713 | SCM_DEFINE (scm_eval_options_interface, "eval-options-interface", 0, 1, 0, |
1bbd0b84 | 1714 | (SCM setting), |
b3f26b14 MG |
1715 | "Option interface for the evaluation options. Instead of using\n" |
1716 | "this procedure directly, use the procedures @code{eval-enable},\n" | |
1717 | "@code{eval-disable}, @code{eval-set!} and @var{eval-options}.") | |
1bbd0b84 | 1718 | #define FUNC_NAME s_scm_eval_options_interface |
33b97402 MD |
1719 | { |
1720 | SCM ans; | |
1721 | SCM_DEFER_INTS; | |
1722 | ans = scm_options (setting, | |
1723 | scm_eval_opts, | |
1724 | SCM_N_EVAL_OPTIONS, | |
1bbd0b84 | 1725 | FUNC_NAME); |
a74145b8 | 1726 | scm_eval_stack = SCM_EVAL_STACK * sizeof (void *); |
33b97402 MD |
1727 | SCM_ALLOW_INTS; |
1728 | return ans; | |
1729 | } | |
1bbd0b84 | 1730 | #undef FUNC_NAME |
33b97402 | 1731 | |
a1ec6916 | 1732 | SCM_DEFINE (scm_evaluator_traps, "evaluator-traps-interface", 0, 1, 0, |
1bbd0b84 | 1733 | (SCM setting), |
b3f26b14 | 1734 | "Option interface for the evaluator trap options.") |
1bbd0b84 | 1735 | #define FUNC_NAME s_scm_evaluator_traps |
33b97402 MD |
1736 | { |
1737 | SCM ans; | |
1738 | SCM_DEFER_INTS; | |
1739 | ans = scm_options (setting, | |
1740 | scm_evaluator_trap_table, | |
1741 | SCM_N_EVALUATOR_TRAPS, | |
1bbd0b84 | 1742 | FUNC_NAME); |
33b97402 | 1743 | SCM_RESET_DEBUG_MODE; |
bfc69694 | 1744 | SCM_ALLOW_INTS; |
33b97402 MD |
1745 | return ans; |
1746 | } | |
1bbd0b84 | 1747 | #undef FUNC_NAME |
33b97402 | 1748 | |
6dbd0af5 | 1749 | SCM |
6e8d25a6 | 1750 | scm_deval_args (SCM l, SCM env, SCM proc, SCM *lloc) |
0f2d19dd | 1751 | { |
680ed4a8 | 1752 | SCM *results = lloc, res; |
22a52da1 | 1753 | while (!SCM_IMP (l)) |
0f2d19dd | 1754 | { |
cf7c17e9 | 1755 | #ifdef SCM_CAUTIOUS |
44d3cb0d | 1756 | if (SCM_CONSP (l)) |
680ed4a8 MD |
1757 | { |
1758 | if (SCM_IMP (SCM_CAR (l))) | |
6cb702da | 1759 | res = SCM_EVALIM (SCM_CAR (l), env); |
680ed4a8 MD |
1760 | else |
1761 | res = EVALCELLCAR (l, env); | |
1762 | } | |
3201d763 | 1763 | else if (SCM_TYP3 (l) == scm_tc3_cons_gloc) |
680ed4a8 | 1764 | { |
92c2555f | 1765 | scm_t_bits vcell = |
86d31dfe | 1766 | SCM_STRUCT_VTABLE_DATA (l) [scm_vtable_index_vcell]; |
3201d763 | 1767 | if (vcell == 0) |
680ed4a8 | 1768 | res = SCM_CAR (l); /* struct planted in code */ |
3201d763 | 1769 | else |
86d31dfe | 1770 | res = SCM_GLOC_VAL (SCM_CAR (l)); |
680ed4a8 MD |
1771 | } |
1772 | else | |
1773 | goto wrongnumargs; | |
1774 | #else | |
1775 | res = EVALCAR (l, env); | |
1776 | #endif | |
1777 | *lloc = scm_cons (res, SCM_EOL); | |
a23afe53 | 1778 | lloc = SCM_CDRLOC (*lloc); |
0f2d19dd JB |
1779 | l = SCM_CDR (l); |
1780 | } | |
cf7c17e9 | 1781 | #ifdef SCM_CAUTIOUS |
22a52da1 | 1782 | if (!SCM_NULLP (l)) |
680ed4a8 MD |
1783 | { |
1784 | wrongnumargs: | |
1785 | scm_wrong_num_args (proc); | |
1786 | } | |
1787 | #endif | |
1788 | return *results; | |
0f2d19dd JB |
1789 | } |
1790 | ||
6dbd0af5 MD |
1791 | #endif /* !DEVAL */ |
1792 | ||
1793 | ||
1794 | /* SECTION: Some local definitions for the evaluator. | |
1795 | */ | |
1796 | ||
d9d39d76 MV |
1797 | /* Update the toplevel environment frame ENV so that it refers to the |
1798 | current module. | |
1799 | */ | |
1800 | #define UPDATE_TOPLEVEL_ENV(env) \ | |
1801 | do { \ | |
1802 | SCM p = scm_current_module_lookup_closure (); \ | |
1803 | if (p != SCM_CAR(env)) \ | |
1804 | env = scm_top_level_env (p); \ | |
1805 | } while (0) | |
1806 | ||
6dbd0af5 | 1807 | #ifndef DEVAL |
3201d763 | 1808 | #define CHECK_EQVISH(A,B) (SCM_EQ_P ((A), (B)) || (SCM_NFALSEP (scm_eqv_p ((A), (B))))) |
6dbd0af5 MD |
1809 | #endif /* DEVAL */ |
1810 | ||
399dedcc | 1811 | #define BUILTIN_RPASUBR /* Handle rpsubrs and asubrs without calling apply */ |
6dbd0af5 MD |
1812 | |
1813 | /* SECTION: This is the evaluator. Like any real monster, it has | |
1814 | * three heads. This code is compiled twice. | |
1815 | */ | |
1816 | ||
0f2d19dd | 1817 | #if 0 |
1cc91f1b | 1818 | |
0f2d19dd | 1819 | SCM |
1bbd0b84 | 1820 | scm_ceval (SCM x, SCM env) |
0f2d19dd JB |
1821 | {} |
1822 | #endif | |
1823 | #if 0 | |
1cc91f1b | 1824 | |
0f2d19dd | 1825 | SCM |
1bbd0b84 | 1826 | scm_deval (SCM x, SCM env) |
0f2d19dd JB |
1827 | {} |
1828 | #endif | |
1829 | ||
6dbd0af5 | 1830 | SCM |
1bbd0b84 | 1831 | SCM_CEVAL (SCM x, SCM env) |
0f2d19dd JB |
1832 | { |
1833 | union | |
1834 | { | |
1835 | SCM *lloc; | |
1836 | SCM arg1; | |
f8769b1d | 1837 | } t; |
86d31dfe | 1838 | SCM proc, arg2, orig_sym; |
6dbd0af5 | 1839 | #ifdef DEVAL |
92c2555f MV |
1840 | scm_t_debug_frame debug; |
1841 | scm_t_debug_info *debug_info_end; | |
1646d37b | 1842 | debug.prev = scm_last_debug_frame; |
6dbd0af5 | 1843 | debug.status = scm_debug_eframe_size; |
04b6c081 | 1844 | /* |
92c2555f | 1845 | * The debug.vect contains twice as much scm_t_debug_info frames as the |
04b6c081 MD |
1846 | * user has specified with (debug-set! frames <n>). |
1847 | * | |
1848 | * Even frames are eval frames, odd frames are apply frames. | |
1849 | */ | |
92c2555f | 1850 | debug.vect = (scm_t_debug_info *) alloca (scm_debug_eframe_size |
c0ab1b8d JB |
1851 | * sizeof (debug.vect[0])); |
1852 | debug.info = debug.vect; | |
1853 | debug_info_end = debug.vect + scm_debug_eframe_size; | |
1854 | scm_last_debug_frame = &debug; | |
6dbd0af5 | 1855 | #endif |
b7ff98dd | 1856 | #ifdef EVAL_STACK_CHECKING |
6f13f9cb MD |
1857 | if (scm_stack_checking_enabled_p |
1858 | && SCM_STACK_OVERFLOW_P ((SCM_STACKITEM *) &proc)) | |
6dbd0af5 | 1859 | { |
b7ff98dd | 1860 | #ifdef DEVAL |
6dbd0af5 MD |
1861 | debug.info->e.exp = x; |
1862 | debug.info->e.env = env; | |
b7ff98dd | 1863 | #endif |
6dbd0af5 MD |
1864 | scm_report_stack_overflow (); |
1865 | } | |
1866 | #endif | |
1867 | #ifdef DEVAL | |
1868 | goto start; | |
1869 | #endif | |
1870 | loopnoap: | |
1871 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
1872 | loop: | |
1873 | #ifdef DEVAL | |
b7ff98dd MD |
1874 | SCM_CLEAR_ARGSREADY (debug); |
1875 | if (SCM_OVERFLOWP (debug)) | |
6dbd0af5 | 1876 | --debug.info; |
04b6c081 MD |
1877 | /* |
1878 | * In theory, this should be the only place where it is necessary to | |
1879 | * check for space in debug.vect since both eval frames and | |
1880 | * available space are even. | |
1881 | * | |
1882 | * For this to be the case, however, it is necessary that primitive | |
1883 | * special forms which jump back to `loop', `begin' or some similar | |
1884 | * label call PREP_APPLY. A convenient way to do this is to jump to | |
1885 | * `loopnoap' or `cdrxnoap'. | |
1886 | */ | |
c0ab1b8d | 1887 | else if (++debug.info >= debug_info_end) |
6dbd0af5 | 1888 | { |
b7ff98dd | 1889 | SCM_SET_OVERFLOW (debug); |
6dbd0af5 MD |
1890 | debug.info -= 2; |
1891 | } | |
1892 | start: | |
1893 | debug.info->e.exp = x; | |
1894 | debug.info->e.env = env; | |
b6d75948 | 1895 | if (CHECK_ENTRY && SCM_TRAPS_P) |
b7ff98dd | 1896 | if (SCM_ENTER_FRAME_P || (SCM_BREAKPOINTS_P && SRCBRKP (x))) |
6dbd0af5 | 1897 | { |
156dcb09 | 1898 | SCM tail = SCM_BOOL(SCM_TAILRECP (debug)); |
b7ff98dd | 1899 | SCM_SET_TAILREC (debug); |
b7ff98dd | 1900 | if (SCM_CHEAPTRAPS_P) |
c0ab1b8d | 1901 | t.arg1 = scm_make_debugobj (&debug); |
6dbd0af5 MD |
1902 | else |
1903 | { | |
5f144b10 GH |
1904 | int first; |
1905 | SCM val = scm_make_continuation (&first); | |
1906 | ||
1907 | if (first) | |
1908 | t.arg1 = val; | |
1909 | else | |
6dbd0af5 | 1910 | { |
5f144b10 | 1911 | x = val; |
6dbd0af5 MD |
1912 | if (SCM_IMP (x)) |
1913 | { | |
1914 | RETURN (x); | |
1915 | } | |
1916 | else | |
1917 | /* This gives the possibility for the debugger to | |
1918 | modify the source expression before evaluation. */ | |
1919 | goto dispatch; | |
1920 | } | |
1921 | } | |
d95c0b76 NJ |
1922 | SCM_TRAPS_P = 0; |
1923 | scm_call_4 (SCM_ENTER_FRAME_HDLR, | |
1924 | scm_sym_enter_frame, | |
1925 | t.arg1, | |
1926 | tail, | |
1927 | scm_unmemocopy (x, env)); | |
1928 | SCM_TRAPS_P = 1; | |
6dbd0af5 | 1929 | } |
6dbd0af5 | 1930 | #endif |
e3173f93 | 1931 | #if defined (USE_THREADS) || defined (DEVAL) |
f8769b1d | 1932 | dispatch: |
e3173f93 | 1933 | #endif |
9cb5124f | 1934 | SCM_TICK; |
0f2d19dd JB |
1935 | switch (SCM_TYP7 (x)) |
1936 | { | |
28b06554 | 1937 | case scm_tc7_symbol: |
0f2d19dd JB |
1938 | /* Only happens when called at top level. |
1939 | */ | |
1940 | x = scm_cons (x, SCM_UNDEFINED); | |
1941 | goto retval; | |
1942 | ||
c209c88e | 1943 | case SCM_BIT8(SCM_IM_AND): |
0f2d19dd JB |
1944 | x = SCM_CDR (x); |
1945 | t.arg1 = x; | |
1946 | while (SCM_NNULLP (t.arg1 = SCM_CDR (t.arg1))) | |
1947 | if (SCM_FALSEP (EVALCAR (x, env))) | |
1948 | { | |
1949 | RETURN (SCM_BOOL_F); | |
1950 | } | |
1951 | else | |
1952 | x = t.arg1; | |
6dbd0af5 | 1953 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
1954 | goto carloop; |
1955 | ||
c209c88e | 1956 | case SCM_BIT8(SCM_IM_BEGIN): |
d9d39d76 MV |
1957 | /* (currently unused) |
1958 | cdrxnoap: */ | |
6dbd0af5 | 1959 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
d9d39d76 MV |
1960 | /* (currently unused) |
1961 | cdrxbegin: */ | |
0f2d19dd JB |
1962 | x = SCM_CDR (x); |
1963 | ||
1964 | begin: | |
4163eb72 MV |
1965 | /* If we are on toplevel with a lookup closure, we need to sync |
1966 | with the current module. */ | |
22a52da1 | 1967 | if (SCM_CONSP (env) && !SCM_CONSP (SCM_CAR (env))) |
4163eb72 MV |
1968 | { |
1969 | t.arg1 = x; | |
d9d39d76 | 1970 | UPDATE_TOPLEVEL_ENV (env); |
22a52da1 | 1971 | while (!SCM_NULLP (t.arg1 = SCM_CDR (t.arg1))) |
4163eb72 | 1972 | { |
5280aaca | 1973 | EVALCAR (x, env); |
4163eb72 | 1974 | x = t.arg1; |
d9d39d76 | 1975 | UPDATE_TOPLEVEL_ENV (env); |
4163eb72 | 1976 | } |
5280aaca | 1977 | goto carloop; |
4163eb72 MV |
1978 | } |
1979 | else | |
5280aaca MV |
1980 | goto nontoplevel_begin; |
1981 | ||
1982 | nontoplevel_cdrxnoap: | |
1983 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
1984 | nontoplevel_cdrxbegin: | |
1985 | x = SCM_CDR (x); | |
1986 | nontoplevel_begin: | |
1987 | t.arg1 = x; | |
22a52da1 | 1988 | while (!SCM_NULLP (t.arg1 = SCM_CDR (t.arg1))) |
0f2d19dd | 1989 | { |
5280aaca | 1990 | if (SCM_IMP (SCM_CAR (x))) |
26d5b9b4 | 1991 | { |
5280aaca | 1992 | if (SCM_ISYMP (SCM_CAR (x))) |
26d5b9b4 | 1993 | { |
5280aaca MV |
1994 | x = scm_m_expand_body (x, env); |
1995 | goto nontoplevel_begin; | |
26d5b9b4 | 1996 | } |
4163eb72 | 1997 | else |
17fa3fcf | 1998 | SCM_VALIDATE_NON_EMPTY_COMBINATION (SCM_CAR (x)); |
26d5b9b4 | 1999 | } |
5280aaca MV |
2000 | else |
2001 | SCM_CEVAL (SCM_CAR (x), env); | |
2002 | x = t.arg1; | |
0f2d19dd | 2003 | } |
5280aaca | 2004 | |
0f2d19dd | 2005 | carloop: /* scm_eval car of last form in list */ |
22a52da1 | 2006 | if (!SCM_CELLP (SCM_CAR (x))) |
0f2d19dd JB |
2007 | { |
2008 | x = SCM_CAR (x); | |
6cb702da | 2009 | RETURN (SCM_IMP (x) ? SCM_EVALIM (x, env) : SCM_GLOC_VAL (x)) |
0f2d19dd JB |
2010 | } |
2011 | ||
2012 | if (SCM_SYMBOLP (SCM_CAR (x))) | |
2013 | { | |
2014 | retval: | |
26d5b9b4 | 2015 | RETURN (*scm_lookupcar (x, env, 1)) |
0f2d19dd JB |
2016 | } |
2017 | ||
2018 | x = SCM_CAR (x); | |
2019 | goto loop; /* tail recurse */ | |
2020 | ||
2021 | ||
c209c88e | 2022 | case SCM_BIT8(SCM_IM_CASE): |
0f2d19dd JB |
2023 | x = SCM_CDR (x); |
2024 | t.arg1 = EVALCAR (x, env); | |
2025 | while (SCM_NIMP (x = SCM_CDR (x))) | |
2026 | { | |
2027 | proc = SCM_CAR (x); | |
cf498326 | 2028 | if (SCM_EQ_P (scm_sym_else, SCM_CAR (proc))) |
0f2d19dd JB |
2029 | { |
2030 | x = SCM_CDR (proc); | |
6dbd0af5 | 2031 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
2032 | goto begin; |
2033 | } | |
2034 | proc = SCM_CAR (proc); | |
2035 | while (SCM_NIMP (proc)) | |
2036 | { | |
2037 | if (CHECK_EQVISH (SCM_CAR (proc), t.arg1)) | |
2038 | { | |
2039 | x = SCM_CDR (SCM_CAR (x)); | |
6dbd0af5 | 2040 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
2041 | goto begin; |
2042 | } | |
2043 | proc = SCM_CDR (proc); | |
2044 | } | |
2045 | } | |
6dbd0af5 | 2046 | RETURN (SCM_UNSPECIFIED) |
0f2d19dd JB |
2047 | |
2048 | ||
c209c88e | 2049 | case SCM_BIT8(SCM_IM_COND): |
22a52da1 | 2050 | while (!SCM_IMP (x = SCM_CDR (x))) |
0f2d19dd JB |
2051 | { |
2052 | proc = SCM_CAR (x); | |
2053 | t.arg1 = EVALCAR (proc, env); | |
2054 | if (SCM_NFALSEP (t.arg1)) | |
2055 | { | |
2056 | x = SCM_CDR (proc); | |
22a52da1 | 2057 | if (SCM_NULLP (x)) |
0f2d19dd | 2058 | { |
6dbd0af5 | 2059 | RETURN (t.arg1) |
0f2d19dd | 2060 | } |
22a52da1 | 2061 | if (!SCM_EQ_P (scm_sym_arrow, SCM_CAR (x))) |
6dbd0af5 MD |
2062 | { |
2063 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2064 | goto begin; | |
2065 | } | |
0f2d19dd JB |
2066 | proc = SCM_CDR (x); |
2067 | proc = EVALCAR (proc, env); | |
2068 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
6dbd0af5 MD |
2069 | PREP_APPLY (proc, scm_cons (t.arg1, SCM_EOL)); |
2070 | ENTER_APPLY; | |
a820af98 | 2071 | if (SCM_CLOSUREP(proc) && scm_badformalsp (proc, 1)) |
e37a4fba | 2072 | goto umwrongnumargs; |
0f2d19dd JB |
2073 | goto evap1; |
2074 | } | |
2075 | } | |
6dbd0af5 | 2076 | RETURN (SCM_UNSPECIFIED) |
0f2d19dd JB |
2077 | |
2078 | ||
c209c88e | 2079 | case SCM_BIT8(SCM_IM_DO): |
0f2d19dd JB |
2080 | x = SCM_CDR (x); |
2081 | proc = SCM_CAR (SCM_CDR (x)); /* inits */ | |
2082 | t.arg1 = SCM_EOL; /* values */ | |
2083 | while (SCM_NIMP (proc)) | |
2084 | { | |
2085 | t.arg1 = scm_cons (EVALCAR (proc, env), t.arg1); | |
2086 | proc = SCM_CDR (proc); | |
2087 | } | |
e2806c10 | 2088 | env = EXTEND_ENV (SCM_CAR (x), t.arg1, env); |
0f2d19dd JB |
2089 | x = SCM_CDR (SCM_CDR (x)); |
2090 | while (proc = SCM_CAR (x), SCM_FALSEP (EVALCAR (proc, env))) | |
2091 | { | |
f3d2630a | 2092 | for (proc = SCM_CADR (x); SCM_NIMP (proc); proc = SCM_CDR (proc)) |
0f2d19dd JB |
2093 | { |
2094 | t.arg1 = SCM_CAR (proc); /* body */ | |
2095 | SIDEVAL (t.arg1, env); | |
2096 | } | |
f3d2630a MD |
2097 | for (t.arg1 = SCM_EOL, proc = SCM_CDDR (x); |
2098 | SCM_NIMP (proc); | |
2099 | proc = SCM_CDR (proc)) | |
0f2d19dd | 2100 | t.arg1 = scm_cons (EVALCAR (proc, env), t.arg1); /* steps */ |
e2806c10 | 2101 | env = EXTEND_ENV (SCM_CAR (SCM_CAR (env)), t.arg1, SCM_CDR (env)); |
0f2d19dd JB |
2102 | } |
2103 | x = SCM_CDR (proc); | |
2104 | if (SCM_NULLP (x)) | |
6dbd0af5 MD |
2105 | RETURN (SCM_UNSPECIFIED); |
2106 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
5280aaca | 2107 | goto nontoplevel_begin; |
0f2d19dd JB |
2108 | |
2109 | ||
c209c88e | 2110 | case SCM_BIT8(SCM_IM_IF): |
0f2d19dd JB |
2111 | x = SCM_CDR (x); |
2112 | if (SCM_NFALSEP (EVALCAR (x, env))) | |
2113 | x = SCM_CDR (x); | |
2114 | else if (SCM_IMP (x = SCM_CDR (SCM_CDR (x)))) | |
2115 | { | |
2116 | RETURN (SCM_UNSPECIFIED); | |
2117 | } | |
6dbd0af5 | 2118 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
2119 | goto carloop; |
2120 | ||
2121 | ||
c209c88e | 2122 | case SCM_BIT8(SCM_IM_LET): |
0f2d19dd JB |
2123 | x = SCM_CDR (x); |
2124 | proc = SCM_CAR (SCM_CDR (x)); | |
2125 | t.arg1 = SCM_EOL; | |
2126 | do | |
2127 | { | |
2128 | t.arg1 = scm_cons (EVALCAR (proc, env), t.arg1); | |
2129 | } | |
2130 | while (SCM_NIMP (proc = SCM_CDR (proc))); | |
e2806c10 | 2131 | env = EXTEND_ENV (SCM_CAR (x), t.arg1, env); |
0f2d19dd | 2132 | x = SCM_CDR (x); |
5280aaca | 2133 | goto nontoplevel_cdrxnoap; |
0f2d19dd JB |
2134 | |
2135 | ||
c209c88e | 2136 | case SCM_BIT8(SCM_IM_LETREC): |
0f2d19dd | 2137 | x = SCM_CDR (x); |
e2806c10 | 2138 | env = EXTEND_ENV (SCM_CAR (x), scm_undefineds, env); |
0f2d19dd JB |
2139 | x = SCM_CDR (x); |
2140 | proc = SCM_CAR (x); | |
2141 | t.arg1 = SCM_EOL; | |
2142 | do | |
2143 | { | |
2144 | t.arg1 = scm_cons (EVALCAR (proc, env), t.arg1); | |
2145 | } | |
2146 | while (SCM_NIMP (proc = SCM_CDR (proc))); | |
a23afe53 | 2147 | SCM_SETCDR (SCM_CAR (env), t.arg1); |
5280aaca | 2148 | goto nontoplevel_cdrxnoap; |
0f2d19dd JB |
2149 | |
2150 | ||
c209c88e | 2151 | case SCM_BIT8(SCM_IM_LETSTAR): |
0f2d19dd JB |
2152 | x = SCM_CDR (x); |
2153 | proc = SCM_CAR (x); | |
2154 | if (SCM_IMP (proc)) | |
2155 | { | |
e2806c10 | 2156 | env = EXTEND_ENV (SCM_EOL, SCM_EOL, env); |
5280aaca | 2157 | goto nontoplevel_cdrxnoap; |
0f2d19dd JB |
2158 | } |
2159 | do | |
2160 | { | |
2161 | t.arg1 = SCM_CAR (proc); | |
2162 | proc = SCM_CDR (proc); | |
e2806c10 | 2163 | env = EXTEND_ENV (t.arg1, EVALCAR (proc, env), env); |
0f2d19dd JB |
2164 | } |
2165 | while (SCM_NIMP (proc = SCM_CDR (proc))); | |
5280aaca | 2166 | goto nontoplevel_cdrxnoap; |
0f2d19dd | 2167 | |
c209c88e | 2168 | case SCM_BIT8(SCM_IM_OR): |
0f2d19dd JB |
2169 | x = SCM_CDR (x); |
2170 | t.arg1 = x; | |
22a52da1 | 2171 | while (!SCM_NULLP (t.arg1 = SCM_CDR (t.arg1))) |
0f2d19dd JB |
2172 | { |
2173 | x = EVALCAR (x, env); | |
22a52da1 | 2174 | if (!SCM_FALSEP (x)) |
0f2d19dd JB |
2175 | { |
2176 | RETURN (x); | |
2177 | } | |
2178 | x = t.arg1; | |
2179 | } | |
6dbd0af5 | 2180 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
2181 | goto carloop; |
2182 | ||
2183 | ||
c209c88e | 2184 | case SCM_BIT8(SCM_IM_LAMBDA): |
0f2d19dd JB |
2185 | RETURN (scm_closure (SCM_CDR (x), env)); |
2186 | ||
2187 | ||
c209c88e | 2188 | case SCM_BIT8(SCM_IM_QUOTE): |
0f2d19dd JB |
2189 | RETURN (SCM_CAR (SCM_CDR (x))); |
2190 | ||
2191 | ||
c209c88e | 2192 | case SCM_BIT8(SCM_IM_SET_X): |
0f2d19dd JB |
2193 | x = SCM_CDR (x); |
2194 | proc = SCM_CAR (x); | |
3201d763 | 2195 | switch (SCM_ITAG3 (proc)) |
0f2d19dd | 2196 | { |
3201d763 | 2197 | case scm_tc3_cons: |
26d5b9b4 | 2198 | t.lloc = scm_lookupcar (x, env, 1); |
0f2d19dd | 2199 | break; |
3201d763 | 2200 | case scm_tc3_cons_gloc: |
a23afe53 | 2201 | t.lloc = SCM_GLOC_VAL_LOC (proc); |
0f2d19dd JB |
2202 | break; |
2203 | #ifdef MEMOIZE_LOCALS | |
3201d763 | 2204 | case scm_tc3_imm24: |
0f2d19dd JB |
2205 | t.lloc = scm_ilookup (proc, env); |
2206 | break; | |
2207 | #endif | |
2208 | } | |
2209 | x = SCM_CDR (x); | |
2210 | *t.lloc = EVALCAR (x, env); | |
0f2d19dd JB |
2211 | #ifdef SICP |
2212 | RETURN (*t.lloc); | |
2213 | #else | |
2214 | RETURN (SCM_UNSPECIFIED); | |
2215 | #endif | |
2216 | ||
2217 | ||
c209c88e | 2218 | case SCM_BIT8(SCM_IM_DEFINE): /* only for internal defines */ |
26d5b9b4 MD |
2219 | scm_misc_error (NULL, "Bad define placement", SCM_EOL); |
2220 | ||
0f2d19dd | 2221 | /* new syntactic forms go here. */ |
c209c88e | 2222 | case SCM_BIT8(SCM_MAKISYM (0)): |
0f2d19dd JB |
2223 | proc = SCM_CAR (x); |
2224 | SCM_ASRTGO (SCM_ISYMP (proc), badfun); | |
2225 | switch SCM_ISYMNUM (proc) | |
2226 | { | |
0f2d19dd JB |
2227 | case (SCM_ISYMNUM (SCM_IM_APPLY)): |
2228 | proc = SCM_CDR (x); | |
2229 | proc = EVALCAR (proc, env); | |
2230 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
2231 | if (SCM_CLOSUREP (proc)) | |
2232 | { | |
1609038c | 2233 | SCM argl, tl; |
6dbd0af5 | 2234 | PREP_APPLY (proc, SCM_EOL); |
0f2d19dd JB |
2235 | t.arg1 = SCM_CDR (SCM_CDR (x)); |
2236 | t.arg1 = EVALCAR (t.arg1, env); | |
a513ead3 MV |
2237 | apply_closure: |
2238 | /* Go here to tail-call a closure. PROC is the closure | |
2239 | and T.ARG1 is the list of arguments. Do not forget to | |
2240 | call PREP_APPLY. */ | |
6dbd0af5 MD |
2241 | #ifdef DEVAL |
2242 | debug.info->a.args = t.arg1; | |
2243 | #endif | |
cf7c17e9 | 2244 | #ifndef SCM_RECKLESS |
726d810a | 2245 | if (scm_badargsp (SCM_CLOSURE_FORMALS (proc), t.arg1)) |
0f2d19dd JB |
2246 | goto wrongnumargs; |
2247 | #endif | |
c79450dd | 2248 | ENTER_APPLY; |
1609038c MD |
2249 | /* Copy argument list */ |
2250 | if (SCM_IMP (t.arg1)) | |
2251 | argl = t.arg1; | |
2252 | else | |
2253 | { | |
2254 | argl = tl = scm_cons (SCM_CAR (t.arg1), SCM_UNSPECIFIED); | |
2255 | while (SCM_NIMP (t.arg1 = SCM_CDR (t.arg1)) | |
2256 | && SCM_CONSP (t.arg1)) | |
2257 | { | |
2258 | SCM_SETCDR (tl, scm_cons (SCM_CAR (t.arg1), | |
2259 | SCM_UNSPECIFIED)); | |
2260 | tl = SCM_CDR (tl); | |
2261 | } | |
2262 | SCM_SETCDR (tl, t.arg1); | |
2263 | } | |
2264 | ||
726d810a | 2265 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), argl, SCM_ENV (proc)); |
0f2d19dd | 2266 | x = SCM_CODE (proc); |
5280aaca | 2267 | goto nontoplevel_cdrxbegin; |
0f2d19dd | 2268 | } |
81123e6d | 2269 | proc = scm_f_apply; |
0f2d19dd JB |
2270 | goto evapply; |
2271 | ||
2272 | case (SCM_ISYMNUM (SCM_IM_CONT)): | |
5f144b10 GH |
2273 | { |
2274 | int first; | |
2275 | SCM val = scm_make_continuation (&first); | |
2276 | ||
2277 | if (first) | |
2278 | t.arg1 = val; | |
2279 | else | |
2280 | RETURN (val); | |
2281 | } | |
0f2d19dd JB |
2282 | proc = SCM_CDR (x); |
2283 | proc = evalcar (proc, env); | |
2284 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
6dbd0af5 MD |
2285 | PREP_APPLY (proc, scm_cons (t.arg1, SCM_EOL)); |
2286 | ENTER_APPLY; | |
a820af98 | 2287 | if (SCM_CLOSUREP(proc) && scm_badformalsp (proc, 1)) |
e37a4fba | 2288 | goto umwrongnumargs; |
0f2d19dd JB |
2289 | goto evap1; |
2290 | ||
a570e93a MD |
2291 | case (SCM_ISYMNUM (SCM_IM_DELAY)): |
2292 | RETURN (scm_makprom (scm_closure (SCM_CDR (x), env))) | |
2293 | ||
89efbff4 | 2294 | case (SCM_ISYMNUM (SCM_IM_DISPATCH)): |
195847fa MD |
2295 | proc = SCM_CADR (x); /* unevaluated operands */ |
2296 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2297 | if (SCM_IMP (proc)) | |
2298 | arg2 = *scm_ilookup (proc, env); | |
2299 | else if (SCM_NCONSP (proc)) | |
2300 | { | |
2301 | if (SCM_NCELLP (proc)) | |
2302 | arg2 = SCM_GLOC_VAL (proc); | |
2303 | else | |
2304 | arg2 = *scm_lookupcar (SCM_CDR (x), env, 1); | |
2305 | } | |
2306 | else | |
2307 | { | |
2308 | arg2 = scm_cons (EVALCAR (proc, env), SCM_EOL); | |
2309 | t.lloc = SCM_CDRLOC (arg2); | |
2310 | while (SCM_NIMP (proc = SCM_CDR (proc))) | |
2311 | { | |
2312 | *t.lloc = scm_cons (EVALCAR (proc, env), SCM_EOL); | |
2313 | t.lloc = SCM_CDRLOC (*t.lloc); | |
2314 | } | |
2315 | } | |
2316 | ||
2317 | type_dispatch: | |
61364ba6 MD |
2318 | /* The type dispatch code is duplicated here |
2319 | * (c.f. objects.c:scm_mcache_compute_cmethod) since that | |
2320 | * cuts down execution time for type dispatch to 50%. | |
2321 | */ | |
2322 | { | |
c014a02e | 2323 | long i, n, end, mask; |
61364ba6 MD |
2324 | SCM z = SCM_CDDR (x); |
2325 | n = SCM_INUM (SCM_CAR (z)); /* maximum number of specializers */ | |
2326 | proc = SCM_CADR (z); | |
2327 | ||
2328 | if (SCM_NIMP (proc)) | |
2329 | { | |
2330 | /* Prepare for linear search */ | |
2331 | mask = -1; | |
2332 | i = 0; | |
b5c2579a | 2333 | end = SCM_VECTOR_LENGTH (proc); |
61364ba6 MD |
2334 | } |
2335 | else | |
2336 | { | |
2337 | /* Compute a hash value */ | |
c014a02e ML |
2338 | long hashset = SCM_INUM (proc); |
2339 | long j = n; | |
729dbac3 DH |
2340 | z = SCM_CDDR (z); |
2341 | mask = SCM_INUM (SCM_CAR (z)); | |
61364ba6 MD |
2342 | proc = SCM_CADR (z); |
2343 | i = 0; | |
2344 | t.arg1 = arg2; | |
2345 | if (SCM_NIMP (t.arg1)) | |
2346 | do | |
2347 | { | |
d8c40b9f DH |
2348 | i += SCM_STRUCT_DATA (scm_class_of (SCM_CAR (t.arg1))) |
2349 | [scm_si_hashsets + hashset]; | |
61364ba6 MD |
2350 | t.arg1 = SCM_CDR (t.arg1); |
2351 | } | |
4ea6a431 | 2352 | while (j-- && SCM_NIMP (t.arg1)); |
61364ba6 MD |
2353 | i &= mask; |
2354 | end = i; | |
2355 | } | |
2356 | ||
2357 | /* Search for match */ | |
2358 | do | |
2359 | { | |
c014a02e | 2360 | long j = n; |
61364ba6 MD |
2361 | z = SCM_VELTS (proc)[i]; |
2362 | t.arg1 = arg2; /* list of arguments */ | |
2363 | if (SCM_NIMP (t.arg1)) | |
2364 | do | |
2365 | { | |
2366 | /* More arguments than specifiers => CLASS != ENV */ | |
cf498326 | 2367 | if (! SCM_EQ_P (scm_class_of (SCM_CAR (t.arg1)), SCM_CAR (z))) |
61364ba6 MD |
2368 | goto next_method; |
2369 | t.arg1 = SCM_CDR (t.arg1); | |
2370 | z = SCM_CDR (z); | |
2371 | } | |
4ea6a431 | 2372 | while (j-- && SCM_NIMP (t.arg1)); |
61364ba6 MD |
2373 | /* Fewer arguments than specifiers => CAR != ENV */ |
2374 | if (!(SCM_IMP (SCM_CAR (z)) || SCM_CONSP (SCM_CAR (z)))) | |
2375 | goto next_method; | |
2376 | apply_cmethod: | |
2377 | env = EXTEND_ENV (SCM_CAR (SCM_CMETHOD_CODE (z)), | |
2378 | arg2, | |
2379 | SCM_CMETHOD_ENV (z)); | |
2380 | x = SCM_CMETHOD_CODE (z); | |
5280aaca | 2381 | goto nontoplevel_cdrxbegin; |
61364ba6 MD |
2382 | next_method: |
2383 | i = (i + 1) & mask; | |
2384 | } while (i != end); | |
2385 | ||
2386 | z = scm_memoize_method (x, arg2); | |
2387 | goto apply_cmethod; | |
2388 | } | |
73b64342 | 2389 | |
ca4be6ea MD |
2390 | case (SCM_ISYMNUM (SCM_IM_SLOT_REF)): |
2391 | x = SCM_CDR (x); | |
2392 | t.arg1 = EVALCAR (x, env); | |
d8c40b9f | 2393 | RETURN (SCM_PACK (SCM_STRUCT_DATA (t.arg1) [SCM_INUM (SCM_CADR (x))])) |
ca4be6ea MD |
2394 | |
2395 | case (SCM_ISYMNUM (SCM_IM_SLOT_SET_X)): | |
2396 | x = SCM_CDR (x); | |
2397 | t.arg1 = EVALCAR (x, env); | |
2398 | x = SCM_CDR (x); | |
2399 | proc = SCM_CDR (x); | |
d8c40b9f DH |
2400 | SCM_STRUCT_DATA (t.arg1) [SCM_INUM (SCM_CAR (x))] |
2401 | = SCM_UNPACK (EVALCAR (proc, env)); | |
5623a9b4 | 2402 | RETURN (SCM_UNSPECIFIED) |
ca4be6ea | 2403 | |
73b64342 MD |
2404 | case (SCM_ISYMNUM (SCM_IM_NIL_COND)): |
2405 | proc = SCM_CDR (x); | |
2406 | while (SCM_NIMP (x = SCM_CDR (proc))) | |
2407 | { | |
2408 | if (!(SCM_FALSEP (t.arg1 = EVALCAR (proc, env)) | |
3201d763 | 2409 | || SCM_EQ_P (t.arg1, scm_lisp_nil))) |
73b64342 | 2410 | { |
cf498326 | 2411 | if (SCM_EQ_P (SCM_CAR (x), SCM_UNSPECIFIED)) |
73b64342 MD |
2412 | RETURN (t.arg1); |
2413 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2414 | goto carloop; | |
2415 | } | |
2416 | proc = SCM_CDR (x); | |
2417 | } | |
2418 | x = proc; | |
2419 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2420 | goto carloop; | |
2421 | ||
2422 | case (SCM_ISYMNUM (SCM_IM_NIL_IFY)): | |
2423 | x = SCM_CDR (x); | |
2424 | RETURN ((SCM_FALSEP (proc = EVALCAR (x, env)) || SCM_NULLP (proc)) | |
43a912cf | 2425 | ? scm_lisp_nil |
73b64342 MD |
2426 | : proc) |
2427 | ||
2428 | case (SCM_ISYMNUM (SCM_IM_T_IFY)): | |
2429 | x = SCM_CDR (x); | |
1385d8ae | 2430 | RETURN (SCM_NFALSEP (EVALCAR (x, env)) ? scm_lisp_t : scm_lisp_nil) |
73b64342 MD |
2431 | |
2432 | case (SCM_ISYMNUM (SCM_IM_0_COND)): | |
2433 | proc = SCM_CDR (x); | |
2434 | while (SCM_NIMP (x = SCM_CDR (proc))) | |
2435 | { | |
2436 | if (!(SCM_FALSEP (t.arg1 = EVALCAR (proc, env)) | |
3201d763 | 2437 | || SCM_EQ_P (t.arg1, SCM_INUM0))) |
73b64342 | 2438 | { |
cf498326 | 2439 | if (SCM_EQ_P (SCM_CAR (x), SCM_UNSPECIFIED)) |
73b64342 MD |
2440 | RETURN (t.arg1); |
2441 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2442 | goto carloop; | |
2443 | } | |
2444 | proc = SCM_CDR (x); | |
2445 | } | |
2446 | x = proc; | |
2447 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2448 | goto carloop; | |
2449 | ||
2450 | case (SCM_ISYMNUM (SCM_IM_0_IFY)): | |
2451 | x = SCM_CDR (x); | |
2452 | RETURN (SCM_FALSEP (proc = EVALCAR (x, env)) | |
2453 | ? SCM_INUM0 | |
2454 | : proc) | |
2455 | ||
2456 | case (SCM_ISYMNUM (SCM_IM_1_IFY)): | |
2457 | x = SCM_CDR (x); | |
2458 | RETURN (SCM_NFALSEP (EVALCAR (x, env)) | |
2459 | ? SCM_MAKINUM (1) | |
2460 | : SCM_INUM0) | |
2461 | ||
2462 | case (SCM_ISYMNUM (SCM_IM_BIND)): | |
2463 | x = SCM_CDR (x); | |
2464 | ||
2465 | t.arg1 = SCM_CAR (x); | |
2466 | arg2 = SCM_CDAR (env); | |
2467 | while (SCM_NIMP (arg2)) | |
2468 | { | |
2469 | proc = SCM_GLOC_VAL (SCM_CAR (t.arg1)); | |
a963f787 MD |
2470 | SCM_SETCDR (SCM_PACK (SCM_UNPACK (SCM_CAR (t.arg1)) - 1L), |
2471 | SCM_CAR (arg2)); | |
73b64342 MD |
2472 | SCM_SETCAR (arg2, proc); |
2473 | t.arg1 = SCM_CDR (t.arg1); | |
2474 | arg2 = SCM_CDR (arg2); | |
2475 | } | |
2476 | t.arg1 = SCM_CAR (x); | |
2477 | scm_dynwinds = scm_acons (t.arg1, SCM_CDAR (env), scm_dynwinds); | |
89efbff4 | 2478 | |
73b64342 MD |
2479 | arg2 = x = SCM_CDR (x); |
2480 | while (SCM_NNULLP (arg2 = SCM_CDR (arg2))) | |
2481 | { | |
2482 | SIDEVAL (SCM_CAR (x), env); | |
2483 | x = arg2; | |
2484 | } | |
2485 | proc = EVALCAR (x, env); | |
2486 | ||
2487 | scm_dynwinds = SCM_CDR (scm_dynwinds); | |
2488 | arg2 = SCM_CDAR (env); | |
2489 | while (SCM_NIMP (arg2)) | |
2490 | { | |
a963f787 MD |
2491 | SCM_SETCDR (SCM_PACK (SCM_UNPACK (SCM_CAR (t.arg1)) - 1L), |
2492 | SCM_CAR (arg2)); | |
73b64342 MD |
2493 | t.arg1 = SCM_CDR (t.arg1); |
2494 | arg2 = SCM_CDR (arg2); | |
2495 | } | |
2496 | ||
a513ead3 | 2497 | RETURN (proc); |
73b64342 | 2498 | |
a513ead3 MV |
2499 | case (SCM_ISYMNUM (SCM_IM_CALL_WITH_VALUES)): |
2500 | { | |
2501 | proc = SCM_CDR (x); | |
2502 | x = EVALCAR (proc, env); | |
2503 | proc = SCM_CDR (proc); | |
2504 | proc = EVALCAR (proc, env); | |
2505 | t.arg1 = SCM_APPLY (x, SCM_EOL, SCM_EOL); | |
2506 | if (SCM_VALUESP (t.arg1)) | |
2507 | t.arg1 = scm_struct_ref (t.arg1, SCM_INUM0); | |
2508 | else | |
2509 | t.arg1 = scm_cons (t.arg1, SCM_EOL); | |
2510 | if (SCM_CLOSUREP (proc)) | |
2511 | { | |
2512 | PREP_APPLY (proc, t.arg1); | |
2513 | goto apply_closure; | |
2514 | } | |
2515 | return SCM_APPLY (proc, t.arg1, SCM_EOL); | |
2516 | } | |
2517 | ||
0f2d19dd JB |
2518 | default: |
2519 | goto badfun; | |
2520 | } | |
2521 | ||
2522 | default: | |
2523 | proc = x; | |
2524 | badfun: | |
f5bf2977 | 2525 | /* scm_everr (x, env,...) */ |
1afff620 | 2526 | scm_misc_error (NULL, "Wrong type to apply: ~S", scm_list_1 (proc)); |
0f2d19dd JB |
2527 | case scm_tc7_vector: |
2528 | case scm_tc7_wvect: | |
afe5177e | 2529 | #ifdef HAVE_ARRAYS |
0f2d19dd JB |
2530 | case scm_tc7_bvect: |
2531 | case scm_tc7_byvect: | |
2532 | case scm_tc7_svect: | |
2533 | case scm_tc7_ivect: | |
2534 | case scm_tc7_uvect: | |
2535 | case scm_tc7_fvect: | |
2536 | case scm_tc7_dvect: | |
2537 | case scm_tc7_cvect: | |
5c11cc9d | 2538 | #ifdef HAVE_LONG_LONGS |
0f2d19dd | 2539 | case scm_tc7_llvect: |
afe5177e | 2540 | #endif |
0f2d19dd JB |
2541 | #endif |
2542 | case scm_tc7_string: | |
0f2d19dd | 2543 | case scm_tc7_substring: |
0f2d19dd JB |
2544 | case scm_tc7_smob: |
2545 | case scm_tcs_closures: | |
224822be | 2546 | case scm_tc7_cclo: |
89efbff4 | 2547 | case scm_tc7_pws: |
0f2d19dd JB |
2548 | case scm_tcs_subrs: |
2549 | RETURN (x); | |
2550 | ||
2551 | #ifdef MEMOIZE_LOCALS | |
c209c88e | 2552 | case SCM_BIT8(SCM_ILOC00): |
0f2d19dd JB |
2553 | proc = *scm_ilookup (SCM_CAR (x), env); |
2554 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
cf7c17e9 JB |
2555 | #ifndef SCM_RECKLESS |
2556 | #ifdef SCM_CAUTIOUS | |
0f2d19dd JB |
2557 | goto checkargs; |
2558 | #endif | |
2559 | #endif | |
2560 | break; | |
2561 | #endif /* ifdef MEMOIZE_LOCALS */ | |
2562 | ||
2563 | ||
3201d763 | 2564 | case scm_tcs_cons_gloc: { |
92c2555f | 2565 | scm_t_bits vcell = SCM_STRUCT_VTABLE_DATA (x) [scm_vtable_index_vcell]; |
3201d763 | 2566 | if (vcell == 0) { |
aa00bd1e MD |
2567 | /* This is a struct implanted in the code, not a gloc. */ |
2568 | RETURN (x); | |
3201d763 | 2569 | } else { |
86d31dfe | 2570 | proc = SCM_GLOC_VAL (SCM_CAR (x)); |
3201d763 | 2571 | SCM_ASRTGO (SCM_NIMP (proc), badfun); |
cf7c17e9 JB |
2572 | #ifndef SCM_RECKLESS |
2573 | #ifdef SCM_CAUTIOUS | |
3201d763 | 2574 | goto checkargs; |
0f2d19dd JB |
2575 | #endif |
2576 | #endif | |
3201d763 | 2577 | } |
0f2d19dd | 2578 | break; |
3201d763 | 2579 | } |
0f2d19dd JB |
2580 | |
2581 | case scm_tcs_cons_nimcar: | |
86d31dfe MV |
2582 | orig_sym = SCM_CAR (x); |
2583 | if (SCM_SYMBOLP (orig_sym)) | |
0f2d19dd | 2584 | { |
f8769b1d | 2585 | #ifdef USE_THREADS |
26d5b9b4 | 2586 | t.lloc = scm_lookupcar1 (x, env, 1); |
f8769b1d MV |
2587 | if (t.lloc == NULL) |
2588 | { | |
2589 | /* we have lost the race, start again. */ | |
2590 | goto dispatch; | |
2591 | } | |
2592 | proc = *t.lloc; | |
2593 | #else | |
26d5b9b4 | 2594 | proc = *scm_lookupcar (x, env, 1); |
f8769b1d MV |
2595 | #endif |
2596 | ||
0f2d19dd JB |
2597 | if (SCM_IMP (proc)) |
2598 | { | |
86d31dfe MV |
2599 | SCM_SETCAR (x, orig_sym); /* Undo memoizing effect of |
2600 | lookupcar */ | |
0f2d19dd JB |
2601 | goto badfun; |
2602 | } | |
22a52da1 | 2603 | if (SCM_MACROP (proc)) |
0f2d19dd | 2604 | { |
86d31dfe MV |
2605 | SCM_SETCAR (x, orig_sym); /* Undo memoizing effect of |
2606 | lookupcar */ | |
0f2d19dd | 2607 | handle_a_macro: |
368bf056 | 2608 | #ifdef DEVAL |
7c354052 MD |
2609 | /* Set a flag during macro expansion so that macro |
2610 | application frames can be deleted from the backtrace. */ | |
2611 | SCM_SET_MACROEXP (debug); | |
368bf056 | 2612 | #endif |
22a52da1 | 2613 | t.arg1 = SCM_APPLY (SCM_MACRO_CODE (proc), x, |
f8769b1d MV |
2614 | scm_cons (env, scm_listofnull)); |
2615 | ||
7c354052 MD |
2616 | #ifdef DEVAL |
2617 | SCM_CLEAR_MACROEXP (debug); | |
2618 | #endif | |
22a52da1 | 2619 | switch (SCM_MACRO_TYPE (proc)) |
0f2d19dd JB |
2620 | { |
2621 | case 2: | |
2622 | if (scm_ilength (t.arg1) <= 0) | |
2623 | t.arg1 = scm_cons2 (SCM_IM_BEGIN, t.arg1, SCM_EOL); | |
6dbd0af5 | 2624 | #ifdef DEVAL |
22a52da1 | 2625 | if (!SCM_CLOSUREP (SCM_MACRO_CODE (proc))) |
6dbd0af5 | 2626 | { |
6dbd0af5 | 2627 | SCM_DEFER_INTS; |
a23afe53 MD |
2628 | SCM_SETCAR (x, SCM_CAR (t.arg1)); |
2629 | SCM_SETCDR (x, SCM_CDR (t.arg1)); | |
6dbd0af5 MD |
2630 | SCM_ALLOW_INTS; |
2631 | goto dispatch; | |
2632 | } | |
2633 | /* Prevent memoizing of debug info expression. */ | |
6203706f MD |
2634 | debug.info->e.exp = scm_cons_source (debug.info->e.exp, |
2635 | SCM_CAR (x), | |
2636 | SCM_CDR (x)); | |
6dbd0af5 | 2637 | #endif |
0f2d19dd | 2638 | SCM_DEFER_INTS; |
a23afe53 MD |
2639 | SCM_SETCAR (x, SCM_CAR (t.arg1)); |
2640 | SCM_SETCDR (x, SCM_CDR (t.arg1)); | |
0f2d19dd | 2641 | SCM_ALLOW_INTS; |
6dbd0af5 | 2642 | goto loopnoap; |
0f2d19dd JB |
2643 | case 1: |
2644 | if (SCM_NIMP (x = t.arg1)) | |
6dbd0af5 | 2645 | goto loopnoap; |
0f2d19dd JB |
2646 | case 0: |
2647 | RETURN (t.arg1); | |
2648 | } | |
2649 | } | |
2650 | } | |
2651 | else | |
2652 | proc = SCM_CEVAL (SCM_CAR (x), env); | |
22a52da1 | 2653 | SCM_ASRTGO (!SCM_IMP (proc), badfun); |
cf7c17e9 JB |
2654 | #ifndef SCM_RECKLESS |
2655 | #ifdef SCM_CAUTIOUS | |
0f2d19dd JB |
2656 | checkargs: |
2657 | #endif | |
2658 | if (SCM_CLOSUREP (proc)) | |
2659 | { | |
726d810a | 2660 | arg2 = SCM_CLOSURE_FORMALS (proc); |
0f2d19dd | 2661 | t.arg1 = SCM_CDR (x); |
726d810a | 2662 | while (!SCM_NULLP (arg2)) |
0f2d19dd | 2663 | { |
22a52da1 | 2664 | if (!SCM_CONSP (arg2)) |
0f2d19dd JB |
2665 | goto evapply; |
2666 | if (SCM_IMP (t.arg1)) | |
2667 | goto umwrongnumargs; | |
2668 | arg2 = SCM_CDR (arg2); | |
2669 | t.arg1 = SCM_CDR (t.arg1); | |
2670 | } | |
22a52da1 | 2671 | if (!SCM_NULLP (t.arg1)) |
0f2d19dd JB |
2672 | goto umwrongnumargs; |
2673 | } | |
22a52da1 | 2674 | else if (SCM_MACROP (proc)) |
0f2d19dd JB |
2675 | goto handle_a_macro; |
2676 | #endif | |
2677 | } | |
2678 | ||
2679 | ||
6dbd0af5 MD |
2680 | evapply: |
2681 | PREP_APPLY (proc, SCM_EOL); | |
2682 | if (SCM_NULLP (SCM_CDR (x))) { | |
2683 | ENTER_APPLY; | |
89efbff4 | 2684 | evap0: |
0f2d19dd JB |
2685 | switch (SCM_TYP7 (proc)) |
2686 | { /* no arguments given */ | |
2687 | case scm_tc7_subr_0: | |
2688 | RETURN (SCM_SUBRF (proc) ()); | |
2689 | case scm_tc7_subr_1o: | |
2690 | RETURN (SCM_SUBRF (proc) (SCM_UNDEFINED)); | |
2691 | case scm_tc7_lsubr: | |
2692 | RETURN (SCM_SUBRF (proc) (SCM_EOL)); | |
2693 | case scm_tc7_rpsubr: | |
2694 | RETURN (SCM_BOOL_T); | |
2695 | case scm_tc7_asubr: | |
2696 | RETURN (SCM_SUBRF (proc) (SCM_UNDEFINED, SCM_UNDEFINED)); | |
0717dfd8 | 2697 | case scm_tc7_smob: |
68b06924 | 2698 | if (!SCM_SMOB_APPLICABLE_P (proc)) |
0717dfd8 | 2699 | goto badfun; |
68b06924 | 2700 | RETURN (SCM_SMOB_APPLY_0 (proc)); |
0f2d19dd JB |
2701 | case scm_tc7_cclo: |
2702 | t.arg1 = proc; | |
2703 | proc = SCM_CCLO_SUBR (proc); | |
6dbd0af5 MD |
2704 | #ifdef DEVAL |
2705 | debug.info->a.proc = proc; | |
2706 | debug.info->a.args = scm_cons (t.arg1, SCM_EOL); | |
2707 | #endif | |
0f2d19dd | 2708 | goto evap1; |
89efbff4 MD |
2709 | case scm_tc7_pws: |
2710 | proc = SCM_PROCEDURE (proc); | |
2711 | #ifdef DEVAL | |
2712 | debug.info->a.proc = proc; | |
2713 | #endif | |
002f1a5d MD |
2714 | if (!SCM_CLOSUREP (proc)) |
2715 | goto evap0; | |
2716 | if (scm_badformalsp (proc, 0)) | |
2717 | goto umwrongnumargs; | |
0f2d19dd JB |
2718 | case scm_tcs_closures: |
2719 | x = SCM_CODE (proc); | |
726d810a | 2720 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), SCM_EOL, SCM_ENV (proc)); |
5280aaca | 2721 | goto nontoplevel_cdrxbegin; |
86d31dfe | 2722 | case scm_tcs_cons_gloc: /* really structs, not glocs */ |
195847fa MD |
2723 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) |
2724 | { | |
2725 | x = SCM_ENTITY_PROCEDURE (proc); | |
2726 | arg2 = SCM_EOL; | |
2727 | goto type_dispatch; | |
2728 | } | |
2729 | else if (!SCM_I_OPERATORP (proc)) | |
9b07e212 MD |
2730 | goto badfun; |
2731 | else | |
da7f71d7 | 2732 | { |
195847fa MD |
2733 | t.arg1 = proc; |
2734 | proc = (SCM_I_ENTITYP (proc) | |
2735 | ? SCM_ENTITY_PROCEDURE (proc) | |
2736 | : SCM_OPERATOR_PROCEDURE (proc)); | |
da7f71d7 | 2737 | #ifdef DEVAL |
195847fa MD |
2738 | debug.info->a.proc = proc; |
2739 | debug.info->a.args = scm_cons (t.arg1, SCM_EOL); | |
da7f71d7 | 2740 | #endif |
195847fa MD |
2741 | if (SCM_NIMP (proc)) |
2742 | goto evap1; | |
2743 | else | |
2744 | goto badfun; | |
da7f71d7 | 2745 | } |
0f2d19dd JB |
2746 | case scm_tc7_subr_1: |
2747 | case scm_tc7_subr_2: | |
2748 | case scm_tc7_subr_2o: | |
2749 | case scm_tc7_cxr: | |
2750 | case scm_tc7_subr_3: | |
2751 | case scm_tc7_lsubr_2: | |
2752 | umwrongnumargs: | |
2753 | unmemocar (x, env); | |
2754 | wrongnumargs: | |
f5bf2977 GH |
2755 | /* scm_everr (x, env,...) */ |
2756 | scm_wrong_num_args (proc); | |
0f2d19dd JB |
2757 | default: |
2758 | /* handle macros here */ | |
2759 | goto badfun; | |
2760 | } | |
6dbd0af5 | 2761 | } |
0f2d19dd JB |
2762 | |
2763 | /* must handle macros by here */ | |
2764 | x = SCM_CDR (x); | |
cf7c17e9 | 2765 | #ifdef SCM_CAUTIOUS |
0f2d19dd JB |
2766 | if (SCM_IMP (x)) |
2767 | goto wrongnumargs; | |
680ed4a8 MD |
2768 | else if (SCM_CONSP (x)) |
2769 | { | |
2770 | if (SCM_IMP (SCM_CAR (x))) | |
6cb702da | 2771 | t.arg1 = SCM_EVALIM (SCM_CAR (x), env); |
680ed4a8 MD |
2772 | else |
2773 | t.arg1 = EVALCELLCAR (x, env); | |
2774 | } | |
3201d763 | 2775 | else if (SCM_TYP3 (x) == scm_tc3_cons_gloc) |
680ed4a8 | 2776 | { |
92c2555f | 2777 | scm_t_bits vcell = SCM_STRUCT_VTABLE_DATA (x) [scm_vtable_index_vcell]; |
3201d763 | 2778 | if (vcell == 0) |
680ed4a8 | 2779 | t.arg1 = SCM_CAR (x); /* struct planted in code */ |
3201d763 | 2780 | else |
86d31dfe | 2781 | t.arg1 = SCM_GLOC_VAL (SCM_CAR (x)); |
680ed4a8 MD |
2782 | } |
2783 | else | |
2784 | goto wrongnumargs; | |
2785 | #else | |
0f2d19dd | 2786 | t.arg1 = EVALCAR (x, env); |
680ed4a8 | 2787 | #endif |
6dbd0af5 MD |
2788 | #ifdef DEVAL |
2789 | debug.info->a.args = scm_cons (t.arg1, SCM_EOL); | |
2790 | #endif | |
0f2d19dd JB |
2791 | x = SCM_CDR (x); |
2792 | if (SCM_NULLP (x)) | |
2793 | { | |
6dbd0af5 | 2794 | ENTER_APPLY; |
0f2d19dd JB |
2795 | evap1: |
2796 | switch (SCM_TYP7 (proc)) | |
6dbd0af5 | 2797 | { /* have one argument in t.arg1 */ |
0f2d19dd JB |
2798 | case scm_tc7_subr_2o: |
2799 | RETURN (SCM_SUBRF (proc) (t.arg1, SCM_UNDEFINED)); | |
2800 | case scm_tc7_subr_1: | |
2801 | case scm_tc7_subr_1o: | |
2802 | RETURN (SCM_SUBRF (proc) (t.arg1)); | |
2803 | case scm_tc7_cxr: | |
0f2d19dd JB |
2804 | if (SCM_SUBRF (proc)) |
2805 | { | |
2806 | if (SCM_INUMP (t.arg1)) | |
2807 | { | |
f8de44c1 | 2808 | RETURN (scm_make_real (SCM_DSUBRF (proc) ((double) SCM_INUM (t.arg1)))); |
0f2d19dd JB |
2809 | } |
2810 | SCM_ASRTGO (SCM_NIMP (t.arg1), floerr); | |
2811 | if (SCM_REALP (t.arg1)) | |
2812 | { | |
eb42e2f0 | 2813 | RETURN (scm_make_real (SCM_DSUBRF (proc) (SCM_REAL_VALUE (t.arg1)))); |
0f2d19dd JB |
2814 | } |
2815 | #ifdef SCM_BIGDIG | |
2816 | if (SCM_BIGP (t.arg1)) | |
2817 | { | |
1be6b49c | 2818 | RETURN (scm_make_real (SCM_DSUBRF (proc) (scm_i_big2dbl (t.arg1)))); |
0f2d19dd JB |
2819 | } |
2820 | #endif | |
2821 | floerr: | |
9de33deb | 2822 | SCM_WTA_DISPATCH_1 (*SCM_SUBR_GENERIC (proc), t.arg1, |
3db4adfc | 2823 | SCM_ARG1, SCM_SYMBOL_CHARS (SCM_SNAME (proc))); |
0f2d19dd | 2824 | } |
3201d763 | 2825 | proc = SCM_SNAME (proc); |
0f2d19dd | 2826 | { |
b5c2579a | 2827 | char *chrs = SCM_SYMBOL_CHARS (proc) + SCM_SYMBOL_LENGTH (proc) - 1; |
0f2d19dd JB |
2828 | while ('c' != *--chrs) |
2829 | { | |
0c95b57d | 2830 | SCM_ASSERT (SCM_CONSP (t.arg1), |
3db4adfc | 2831 | t.arg1, SCM_ARG1, SCM_SYMBOL_CHARS (proc)); |
0f2d19dd JB |
2832 | t.arg1 = ('a' == *chrs) ? SCM_CAR (t.arg1) : SCM_CDR (t.arg1); |
2833 | } | |
2834 | RETURN (t.arg1); | |
2835 | } | |
2836 | case scm_tc7_rpsubr: | |
2837 | RETURN (SCM_BOOL_T); | |
2838 | case scm_tc7_asubr: | |
2839 | RETURN (SCM_SUBRF (proc) (t.arg1, SCM_UNDEFINED)); | |
2840 | case scm_tc7_lsubr: | |
2841 | #ifdef DEVAL | |
6dbd0af5 | 2842 | RETURN (SCM_SUBRF (proc) (debug.info->a.args)) |
0f2d19dd JB |
2843 | #else |
2844 | RETURN (SCM_SUBRF (proc) (scm_cons (t.arg1, SCM_EOL))); | |
2845 | #endif | |
0717dfd8 | 2846 | case scm_tc7_smob: |
68b06924 | 2847 | if (!SCM_SMOB_APPLICABLE_P (proc)) |
0717dfd8 | 2848 | goto badfun; |
68b06924 | 2849 | RETURN (SCM_SMOB_APPLY_1 (proc, t.arg1)); |
0f2d19dd JB |
2850 | case scm_tc7_cclo: |
2851 | arg2 = t.arg1; | |
2852 | t.arg1 = proc; | |
2853 | proc = SCM_CCLO_SUBR (proc); | |
6dbd0af5 MD |
2854 | #ifdef DEVAL |
2855 | debug.info->a.args = scm_cons (t.arg1, debug.info->a.args); | |
2856 | debug.info->a.proc = proc; | |
2857 | #endif | |
0f2d19dd | 2858 | goto evap2; |
89efbff4 MD |
2859 | case scm_tc7_pws: |
2860 | proc = SCM_PROCEDURE (proc); | |
2861 | #ifdef DEVAL | |
2862 | debug.info->a.proc = proc; | |
2863 | #endif | |
002f1a5d MD |
2864 | if (!SCM_CLOSUREP (proc)) |
2865 | goto evap1; | |
2866 | if (scm_badformalsp (proc, 1)) | |
2867 | goto umwrongnumargs; | |
0f2d19dd | 2868 | case scm_tcs_closures: |
195847fa | 2869 | /* clos1: */ |
0f2d19dd JB |
2870 | x = SCM_CODE (proc); |
2871 | #ifdef DEVAL | |
726d810a | 2872 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), debug.info->a.args, SCM_ENV (proc)); |
0f2d19dd | 2873 | #else |
726d810a | 2874 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), scm_cons (t.arg1, SCM_EOL), SCM_ENV (proc)); |
0f2d19dd | 2875 | #endif |
5280aaca | 2876 | goto nontoplevel_cdrxbegin; |
86d31dfe | 2877 | case scm_tcs_cons_gloc: /* really structs, not glocs */ |
f3d2630a MD |
2878 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) |
2879 | { | |
195847fa | 2880 | x = SCM_ENTITY_PROCEDURE (proc); |
f3d2630a MD |
2881 | #ifdef DEVAL |
2882 | arg2 = debug.info->a.args; | |
2883 | #else | |
2884 | arg2 = scm_cons (t.arg1, SCM_EOL); | |
2885 | #endif | |
f3d2630a MD |
2886 | goto type_dispatch; |
2887 | } | |
2888 | else if (!SCM_I_OPERATORP (proc)) | |
9b07e212 MD |
2889 | goto badfun; |
2890 | else | |
0c32d76c | 2891 | { |
195847fa MD |
2892 | arg2 = t.arg1; |
2893 | t.arg1 = proc; | |
2894 | proc = (SCM_I_ENTITYP (proc) | |
2895 | ? SCM_ENTITY_PROCEDURE (proc) | |
2896 | : SCM_OPERATOR_PROCEDURE (proc)); | |
0c32d76c | 2897 | #ifdef DEVAL |
195847fa MD |
2898 | debug.info->a.args = scm_cons (t.arg1, debug.info->a.args); |
2899 | debug.info->a.proc = proc; | |
0c32d76c | 2900 | #endif |
195847fa MD |
2901 | if (SCM_NIMP (proc)) |
2902 | goto evap2; | |
2903 | else | |
2904 | goto badfun; | |
0c32d76c | 2905 | } |
0f2d19dd JB |
2906 | case scm_tc7_subr_2: |
2907 | case scm_tc7_subr_0: | |
2908 | case scm_tc7_subr_3: | |
2909 | case scm_tc7_lsubr_2: | |
2910 | goto wrongnumargs; | |
2911 | default: | |
2912 | goto badfun; | |
2913 | } | |
2914 | } | |
cf7c17e9 | 2915 | #ifdef SCM_CAUTIOUS |
0f2d19dd JB |
2916 | if (SCM_IMP (x)) |
2917 | goto wrongnumargs; | |
680ed4a8 MD |
2918 | else if (SCM_CONSP (x)) |
2919 | { | |
2920 | if (SCM_IMP (SCM_CAR (x))) | |
6cb702da | 2921 | arg2 = SCM_EVALIM (SCM_CAR (x), env); |
680ed4a8 MD |
2922 | else |
2923 | arg2 = EVALCELLCAR (x, env); | |
2924 | } | |
3201d763 | 2925 | else if (SCM_TYP3 (x) == scm_tc3_cons_gloc) |
680ed4a8 | 2926 | { |
92c2555f | 2927 | scm_t_bits vcell = SCM_STRUCT_VTABLE_DATA (x) [scm_vtable_index_vcell]; |
3201d763 | 2928 | if (vcell == 0) |
680ed4a8 | 2929 | arg2 = SCM_CAR (x); /* struct planted in code */ |
3201d763 | 2930 | else |
86d31dfe | 2931 | arg2 = SCM_GLOC_VAL (SCM_CAR (x)); |
680ed4a8 MD |
2932 | } |
2933 | else | |
2934 | goto wrongnumargs; | |
2935 | #else | |
2936 | arg2 = EVALCAR (x, env); | |
0f2d19dd JB |
2937 | #endif |
2938 | { /* have two or more arguments */ | |
6dbd0af5 MD |
2939 | #ifdef DEVAL |
2940 | debug.info->a.args = scm_cons2 (t.arg1, arg2, SCM_EOL); | |
2941 | #endif | |
0f2d19dd JB |
2942 | x = SCM_CDR (x); |
2943 | if (SCM_NULLP (x)) { | |
6dbd0af5 | 2944 | ENTER_APPLY; |
0f2d19dd | 2945 | evap2: |
6dbd0af5 MD |
2946 | switch (SCM_TYP7 (proc)) |
2947 | { /* have two arguments */ | |
2948 | case scm_tc7_subr_2: | |
2949 | case scm_tc7_subr_2o: | |
2950 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2)); | |
2951 | case scm_tc7_lsubr: | |
0f2d19dd | 2952 | #ifdef DEVAL |
6dbd0af5 MD |
2953 | RETURN (SCM_SUBRF (proc) (debug.info->a.args)) |
2954 | #else | |
2955 | RETURN (SCM_SUBRF (proc) (scm_cons2 (t.arg1, arg2, SCM_EOL))); | |
0f2d19dd | 2956 | #endif |
6dbd0af5 MD |
2957 | case scm_tc7_lsubr_2: |
2958 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, SCM_EOL)); | |
2959 | case scm_tc7_rpsubr: | |
2960 | case scm_tc7_asubr: | |
2961 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2)); | |
0717dfd8 | 2962 | case scm_tc7_smob: |
68b06924 | 2963 | if (!SCM_SMOB_APPLICABLE_P (proc)) |
0717dfd8 | 2964 | goto badfun; |
68b06924 | 2965 | RETURN (SCM_SMOB_APPLY_2 (proc, t.arg1, arg2)); |
6dbd0af5 MD |
2966 | cclon: |
2967 | case scm_tc7_cclo: | |
0f2d19dd | 2968 | #ifdef DEVAL |
195847fa MD |
2969 | RETURN (SCM_APPLY (SCM_CCLO_SUBR (proc), |
2970 | scm_cons (proc, debug.info->a.args), | |
2971 | SCM_EOL)); | |
0f2d19dd | 2972 | #else |
195847fa MD |
2973 | RETURN (SCM_APPLY (SCM_CCLO_SUBR (proc), |
2974 | scm_cons2 (proc, t.arg1, | |
2975 | scm_cons (arg2, | |
2976 | scm_eval_args (x, | |
2977 | env, | |
2978 | proc))), | |
2979 | SCM_EOL)); | |
6dbd0af5 | 2980 | #endif |
86d31dfe | 2981 | case scm_tcs_cons_gloc: /* really structs, not glocs */ |
f3d2630a MD |
2982 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) |
2983 | { | |
195847fa | 2984 | x = SCM_ENTITY_PROCEDURE (proc); |
f3d2630a MD |
2985 | #ifdef DEVAL |
2986 | arg2 = debug.info->a.args; | |
2987 | #else | |
2988 | arg2 = scm_cons2 (t.arg1, arg2, SCM_EOL); | |
2989 | #endif | |
f3d2630a MD |
2990 | goto type_dispatch; |
2991 | } | |
2992 | else if (!SCM_I_OPERATORP (proc)) | |
9b07e212 MD |
2993 | goto badfun; |
2994 | else | |
0c32d76c | 2995 | { |
195847fa | 2996 | operatorn: |
0c32d76c | 2997 | #ifdef DEVAL |
195847fa MD |
2998 | RETURN (SCM_APPLY (SCM_I_ENTITYP (proc) |
2999 | ? SCM_ENTITY_PROCEDURE (proc) | |
3000 | : SCM_OPERATOR_PROCEDURE (proc), | |
3001 | scm_cons (proc, debug.info->a.args), | |
3002 | SCM_EOL)); | |
3003 | #else | |
3004 | RETURN (SCM_APPLY (SCM_I_ENTITYP (proc) | |
3005 | ? SCM_ENTITY_PROCEDURE (proc) | |
3006 | : SCM_OPERATOR_PROCEDURE (proc), | |
3007 | scm_cons2 (proc, t.arg1, | |
3008 | scm_cons (arg2, | |
3009 | scm_eval_args (x, | |
3010 | env, | |
3011 | proc))), | |
3012 | SCM_EOL)); | |
3013 | #endif | |
0c32d76c | 3014 | } |
6dbd0af5 MD |
3015 | case scm_tc7_subr_0: |
3016 | case scm_tc7_cxr: | |
3017 | case scm_tc7_subr_1o: | |
3018 | case scm_tc7_subr_1: | |
3019 | case scm_tc7_subr_3: | |
6dbd0af5 MD |
3020 | goto wrongnumargs; |
3021 | default: | |
3022 | goto badfun; | |
002f1a5d MD |
3023 | case scm_tc7_pws: |
3024 | proc = SCM_PROCEDURE (proc); | |
3025 | #ifdef DEVAL | |
3026 | debug.info->a.proc = proc; | |
3027 | #endif | |
3028 | if (!SCM_CLOSUREP (proc)) | |
3029 | goto evap2; | |
3030 | if (scm_badformalsp (proc, 2)) | |
3031 | goto umwrongnumargs; | |
6dbd0af5 | 3032 | case scm_tcs_closures: |
195847fa | 3033 | /* clos2: */ |
0f2d19dd | 3034 | #ifdef DEVAL |
726d810a | 3035 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), |
da7f71d7 MD |
3036 | debug.info->a.args, |
3037 | SCM_ENV (proc)); | |
0f2d19dd | 3038 | #else |
726d810a | 3039 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), |
da7f71d7 | 3040 | scm_cons2 (t.arg1, arg2, SCM_EOL), SCM_ENV (proc)); |
0f2d19dd | 3041 | #endif |
6dbd0af5 | 3042 | x = SCM_CODE (proc); |
5280aaca | 3043 | goto nontoplevel_cdrxbegin; |
6dbd0af5 | 3044 | } |
0f2d19dd | 3045 | } |
cf7c17e9 | 3046 | #ifdef SCM_CAUTIOUS |
680ed4a8 MD |
3047 | if (SCM_IMP (x) || SCM_NECONSP (x)) |
3048 | goto wrongnumargs; | |
3049 | #endif | |
0f2d19dd | 3050 | #ifdef DEVAL |
6dbd0af5 | 3051 | debug.info->a.args = scm_cons2 (t.arg1, arg2, |
680ed4a8 MD |
3052 | scm_deval_args (x, env, proc, |
3053 | SCM_CDRLOC (SCM_CDR (debug.info->a.args)))); | |
0f2d19dd | 3054 | #endif |
6dbd0af5 | 3055 | ENTER_APPLY; |
89efbff4 | 3056 | evap3: |
6dbd0af5 MD |
3057 | switch (SCM_TYP7 (proc)) |
3058 | { /* have 3 or more arguments */ | |
0f2d19dd | 3059 | #ifdef DEVAL |
6dbd0af5 MD |
3060 | case scm_tc7_subr_3: |
3061 | SCM_ASRTGO (SCM_NULLP (SCM_CDR (x)), wrongnumargs); | |
da7f71d7 MD |
3062 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, |
3063 | SCM_CADDR (debug.info->a.args))); | |
6dbd0af5 | 3064 | case scm_tc7_asubr: |
399dedcc MD |
3065 | #ifdef BUILTIN_RPASUBR |
3066 | t.arg1 = SCM_SUBRF(proc)(t.arg1, arg2); | |
3067 | arg2 = SCM_CDR (SCM_CDR (debug.info->a.args)); | |
da7f71d7 MD |
3068 | do |
3069 | { | |
3070 | t.arg1 = SCM_SUBRF(proc)(t.arg1, SCM_CAR (arg2)); | |
3071 | arg2 = SCM_CDR (arg2); | |
3072 | } | |
3073 | while (SCM_NIMP (arg2)); | |
399dedcc MD |
3074 | RETURN (t.arg1) |
3075 | #endif /* BUILTIN_RPASUBR */ | |
6dbd0af5 | 3076 | case scm_tc7_rpsubr: |
71d3aa6d MD |
3077 | #ifdef BUILTIN_RPASUBR |
3078 | if (SCM_FALSEP (SCM_SUBRF (proc) (t.arg1, arg2))) | |
3079 | RETURN (SCM_BOOL_F) | |
3080 | t.arg1 = SCM_CDR (SCM_CDR (debug.info->a.args)); | |
da7f71d7 MD |
3081 | do |
3082 | { | |
3083 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg2, SCM_CAR (t.arg1)))) | |
3084 | RETURN (SCM_BOOL_F) | |
3085 | arg2 = SCM_CAR (t.arg1); | |
3086 | t.arg1 = SCM_CDR (t.arg1); | |
3087 | } | |
3088 | while (SCM_NIMP (t.arg1)); | |
71d3aa6d MD |
3089 | RETURN (SCM_BOOL_T) |
3090 | #else /* BUILTIN_RPASUBR */ | |
da7f71d7 MD |
3091 | RETURN (SCM_APPLY (proc, t.arg1, |
3092 | scm_acons (arg2, | |
3093 | SCM_CDR (SCM_CDR (debug.info->a.args)), | |
3094 | SCM_EOL))) | |
71d3aa6d | 3095 | #endif /* BUILTIN_RPASUBR */ |
399dedcc | 3096 | case scm_tc7_lsubr_2: |
da7f71d7 MD |
3097 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, |
3098 | SCM_CDR (SCM_CDR (debug.info->a.args)))) | |
399dedcc MD |
3099 | case scm_tc7_lsubr: |
3100 | RETURN (SCM_SUBRF (proc) (debug.info->a.args)) | |
0717dfd8 | 3101 | case scm_tc7_smob: |
68b06924 | 3102 | if (!SCM_SMOB_APPLICABLE_P (proc)) |
0717dfd8 | 3103 | goto badfun; |
68b06924 KN |
3104 | RETURN (SCM_SMOB_APPLY_3 (proc, t.arg1, arg2, |
3105 | SCM_CDDR (debug.info->a.args))); | |
6dbd0af5 MD |
3106 | case scm_tc7_cclo: |
3107 | goto cclon; | |
89efbff4 MD |
3108 | case scm_tc7_pws: |
3109 | proc = SCM_PROCEDURE (proc); | |
3110 | debug.info->a.proc = proc; | |
002f1a5d MD |
3111 | if (!SCM_CLOSUREP (proc)) |
3112 | goto evap3; | |
726d810a | 3113 | if (scm_badargsp (SCM_CLOSURE_FORMALS (proc), debug.info->a.args)) |
002f1a5d | 3114 | goto umwrongnumargs; |
6dbd0af5 | 3115 | case scm_tcs_closures: |
b7ff98dd | 3116 | SCM_SET_ARGSREADY (debug); |
726d810a | 3117 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), |
6dbd0af5 MD |
3118 | debug.info->a.args, |
3119 | SCM_ENV (proc)); | |
3120 | x = SCM_CODE (proc); | |
5280aaca | 3121 | goto nontoplevel_cdrxbegin; |
6dbd0af5 MD |
3122 | #else /* DEVAL */ |
3123 | case scm_tc7_subr_3: | |
3124 | SCM_ASRTGO (SCM_NULLP (SCM_CDR (x)), wrongnumargs); | |
3125 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, EVALCAR (x, env))); | |
3126 | case scm_tc7_asubr: | |
399dedcc | 3127 | #ifdef BUILTIN_RPASUBR |
da7f71d7 MD |
3128 | t.arg1 = SCM_SUBRF (proc) (t.arg1, arg2); |
3129 | do | |
3130 | { | |
3131 | t.arg1 = SCM_SUBRF(proc)(t.arg1, EVALCAR(x, env)); | |
3132 | x = SCM_CDR(x); | |
3133 | } | |
3134 | while (SCM_NIMP (x)); | |
399dedcc MD |
3135 | RETURN (t.arg1) |
3136 | #endif /* BUILTIN_RPASUBR */ | |
6dbd0af5 | 3137 | case scm_tc7_rpsubr: |
71d3aa6d MD |
3138 | #ifdef BUILTIN_RPASUBR |
3139 | if (SCM_FALSEP (SCM_SUBRF (proc) (t.arg1, arg2))) | |
3140 | RETURN (SCM_BOOL_F) | |
da7f71d7 MD |
3141 | do |
3142 | { | |
3143 | t.arg1 = EVALCAR (x, env); | |
3144 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg2, t.arg1))) | |
3145 | RETURN (SCM_BOOL_F) | |
3146 | arg2 = t.arg1; | |
3147 | x = SCM_CDR (x); | |
3148 | } | |
3149 | while (SCM_NIMP (x)); | |
71d3aa6d MD |
3150 | RETURN (SCM_BOOL_T) |
3151 | #else /* BUILTIN_RPASUBR */ | |
da7f71d7 | 3152 | RETURN (SCM_APPLY (proc, t.arg1, |
680ed4a8 MD |
3153 | scm_acons (arg2, |
3154 | scm_eval_args (x, env, proc), | |
3155 | SCM_EOL))); | |
71d3aa6d | 3156 | #endif /* BUILTIN_RPASUBR */ |
6dbd0af5 | 3157 | case scm_tc7_lsubr_2: |
680ed4a8 | 3158 | RETURN (SCM_SUBRF (proc) (t.arg1, arg2, scm_eval_args (x, env, proc))); |
6dbd0af5 | 3159 | case scm_tc7_lsubr: |
680ed4a8 MD |
3160 | RETURN (SCM_SUBRF (proc) (scm_cons2 (t.arg1, |
3161 | arg2, | |
3162 | scm_eval_args (x, env, proc)))); | |
0717dfd8 | 3163 | case scm_tc7_smob: |
68b06924 | 3164 | if (!SCM_SMOB_APPLICABLE_P (proc)) |
0717dfd8 | 3165 | goto badfun; |
68b06924 KN |
3166 | RETURN (SCM_SMOB_APPLY_3 (proc, t.arg1, arg2, |
3167 | scm_eval_args (x, env, proc))); | |
6dbd0af5 MD |
3168 | case scm_tc7_cclo: |
3169 | goto cclon; | |
89efbff4 MD |
3170 | case scm_tc7_pws: |
3171 | proc = SCM_PROCEDURE (proc); | |
002f1a5d MD |
3172 | if (!SCM_CLOSUREP (proc)) |
3173 | goto evap3; | |
3174 | { | |
726d810a | 3175 | SCM formals = SCM_CLOSURE_FORMALS (proc); |
002f1a5d MD |
3176 | if (SCM_NULLP (formals) |
3177 | || (SCM_CONSP (formals) | |
3178 | && (SCM_NULLP (SCM_CDR (formals)) | |
3179 | || (SCM_CONSP (SCM_CDR (formals)) | |
3180 | && scm_badargsp (SCM_CDDR (formals), x))))) | |
3181 | goto umwrongnumargs; | |
3182 | } | |
6dbd0af5 MD |
3183 | case scm_tcs_closures: |
3184 | #ifdef DEVAL | |
b7ff98dd | 3185 | SCM_SET_ARGSREADY (debug); |
6dbd0af5 | 3186 | #endif |
726d810a | 3187 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), |
680ed4a8 MD |
3188 | scm_cons2 (t.arg1, |
3189 | arg2, | |
3190 | scm_eval_args (x, env, proc)), | |
6dbd0af5 MD |
3191 | SCM_ENV (proc)); |
3192 | x = SCM_CODE (proc); | |
5280aaca | 3193 | goto nontoplevel_cdrxbegin; |
0f2d19dd | 3194 | #endif /* DEVAL */ |
86d31dfe | 3195 | case scm_tcs_cons_gloc: /* really structs, not glocs */ |
f3d2630a MD |
3196 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) |
3197 | { | |
3198 | #ifdef DEVAL | |
3199 | arg2 = debug.info->a.args; | |
3200 | #else | |
3201 | arg2 = scm_cons2 (t.arg1, arg2, scm_eval_args (x, env, proc)); | |
3202 | #endif | |
195847fa | 3203 | x = SCM_ENTITY_PROCEDURE (proc); |
f3d2630a MD |
3204 | goto type_dispatch; |
3205 | } | |
3206 | else if (!SCM_I_OPERATORP (proc)) | |
9b07e212 MD |
3207 | goto badfun; |
3208 | else | |
195847fa | 3209 | goto operatorn; |
6dbd0af5 MD |
3210 | case scm_tc7_subr_2: |
3211 | case scm_tc7_subr_1o: | |
3212 | case scm_tc7_subr_2o: | |
3213 | case scm_tc7_subr_0: | |
3214 | case scm_tc7_cxr: | |
3215 | case scm_tc7_subr_1: | |
6dbd0af5 MD |
3216 | goto wrongnumargs; |
3217 | default: | |
3218 | goto badfun; | |
3219 | } | |
0f2d19dd JB |
3220 | } |
3221 | #ifdef DEVAL | |
6dbd0af5 | 3222 | exit: |
b6d75948 | 3223 | if (CHECK_EXIT && SCM_TRAPS_P) |
b7ff98dd | 3224 | if (SCM_EXIT_FRAME_P || (SCM_TRACE_P && SCM_TRACED_FRAME_P (debug))) |
6dbd0af5 | 3225 | { |
b7ff98dd MD |
3226 | SCM_CLEAR_TRACED_FRAME (debug); |
3227 | if (SCM_CHEAPTRAPS_P) | |
c0ab1b8d | 3228 | t.arg1 = scm_make_debugobj (&debug); |
6dbd0af5 MD |
3229 | else |
3230 | { | |
5f144b10 GH |
3231 | int first; |
3232 | SCM val = scm_make_continuation (&first); | |
3233 | ||
3234 | if (first) | |
3235 | t.arg1 = val; | |
3236 | else | |
6dbd0af5 | 3237 | { |
5f144b10 | 3238 | proc = val; |
6dbd0af5 MD |
3239 | goto ret; |
3240 | } | |
3241 | } | |
d95c0b76 NJ |
3242 | SCM_TRAPS_P = 0; |
3243 | scm_call_3 (SCM_EXIT_FRAME_HDLR, scm_sym_exit_frame, t.arg1, proc); | |
3244 | SCM_TRAPS_P = 1; | |
6dbd0af5 MD |
3245 | } |
3246 | ret: | |
1646d37b | 3247 | scm_last_debug_frame = debug.prev; |
0f2d19dd JB |
3248 | return proc; |
3249 | #endif | |
3250 | } | |
3251 | ||
6dbd0af5 MD |
3252 | |
3253 | /* SECTION: This code is compiled once. | |
3254 | */ | |
3255 | ||
0f2d19dd JB |
3256 | #ifndef DEVAL |
3257 | ||
fdc28395 KN |
3258 | \f |
3259 | /* Simple procedure calls | |
3260 | */ | |
3261 | ||
3262 | SCM | |
3263 | scm_call_0 (SCM proc) | |
3264 | { | |
3265 | return scm_apply (proc, SCM_EOL, SCM_EOL); | |
3266 | } | |
3267 | ||
3268 | SCM | |
3269 | scm_call_1 (SCM proc, SCM arg1) | |
3270 | { | |
3271 | return scm_apply (proc, arg1, scm_listofnull); | |
3272 | } | |
3273 | ||
3274 | SCM | |
3275 | scm_call_2 (SCM proc, SCM arg1, SCM arg2) | |
3276 | { | |
3277 | return scm_apply (proc, arg1, scm_cons (arg2, scm_listofnull)); | |
3278 | } | |
3279 | ||
3280 | SCM | |
3281 | scm_call_3 (SCM proc, SCM arg1, SCM arg2, SCM arg3) | |
3282 | { | |
3283 | return scm_apply (proc, arg1, scm_cons2 (arg2, arg3, scm_listofnull)); | |
3284 | } | |
3285 | ||
d95c0b76 NJ |
3286 | SCM |
3287 | scm_call_4 (SCM proc, SCM arg1, SCM arg2, SCM arg3, SCM arg4) | |
3288 | { | |
3289 | return scm_apply (proc, arg1, scm_cons2 (arg2, arg3, | |
3290 | scm_cons (arg4, scm_listofnull))); | |
3291 | } | |
3292 | ||
fdc28395 KN |
3293 | /* Simple procedure applies |
3294 | */ | |
3295 | ||
3296 | SCM | |
3297 | scm_apply_0 (SCM proc, SCM args) | |
3298 | { | |
3299 | return scm_apply (proc, args, SCM_EOL); | |
3300 | } | |
3301 | ||
3302 | SCM | |
3303 | scm_apply_1 (SCM proc, SCM arg1, SCM args) | |
3304 | { | |
3305 | return scm_apply (proc, scm_cons (arg1, args), SCM_EOL); | |
3306 | } | |
3307 | ||
3308 | SCM | |
3309 | scm_apply_2 (SCM proc, SCM arg1, SCM arg2, SCM args) | |
3310 | { | |
3311 | return scm_apply (proc, scm_cons2 (arg1, arg2, args), SCM_EOL); | |
3312 | } | |
3313 | ||
3314 | SCM | |
3315 | scm_apply_3 (SCM proc, SCM arg1, SCM arg2, SCM arg3, SCM args) | |
3316 | { | |
3317 | return scm_apply (proc, scm_cons (arg1, scm_cons2 (arg2, arg3, args)), | |
3318 | SCM_EOL); | |
3319 | } | |
3320 | ||
82a2622a | 3321 | /* This code processes the arguments to apply: |
b145c172 JB |
3322 | |
3323 | (apply PROC ARG1 ... ARGS) | |
3324 | ||
82a2622a JB |
3325 | Given a list (ARG1 ... ARGS), this function conses the ARG1 |
3326 | ... arguments onto the front of ARGS, and returns the resulting | |
3327 | list. Note that ARGS is a list; thus, the argument to this | |
3328 | function is a list whose last element is a list. | |
3329 | ||
3330 | Apply calls this function, and applies PROC to the elements of the | |
b145c172 JB |
3331 | result. apply:nconc2last takes care of building the list of |
3332 | arguments, given (ARG1 ... ARGS). | |
3333 | ||
82a2622a JB |
3334 | Rather than do new consing, apply:nconc2last destroys its argument. |
3335 | On that topic, this code came into my care with the following | |
3336 | beautifully cryptic comment on that topic: "This will only screw | |
3337 | you if you do (scm_apply scm_apply '( ... ))" If you know what | |
3338 | they're referring to, send me a patch to this comment. */ | |
b145c172 | 3339 | |
3b3b36dd | 3340 | SCM_DEFINE (scm_nconc2last, "apply:nconc2last", 1, 0, 0, |
b3f26b14 MG |
3341 | (SCM lst), |
3342 | "Given a list (@var{arg1} @dots{} @var{args}), this function\n" | |
3343 | "conses the @var{arg1} @dots{} arguments onto the front of\n" | |
3344 | "@var{args}, and returns the resulting list. Note that\n" | |
3345 | "@var{args} is a list; thus, the argument to this function is\n" | |
3346 | "a list whose last element is a list.\n" | |
3347 | "Note: Rather than do new consing, @code{apply:nconc2last}\n" | |
3348 | "destroys its argument, so use with care.") | |
1bbd0b84 | 3349 | #define FUNC_NAME s_scm_nconc2last |
0f2d19dd JB |
3350 | { |
3351 | SCM *lloc; | |
c1bfcf60 | 3352 | SCM_VALIDATE_NONEMPTYLIST (1,lst); |
0f2d19dd JB |
3353 | lloc = &lst; |
3354 | while (SCM_NNULLP (SCM_CDR (*lloc))) | |
a23afe53 | 3355 | lloc = SCM_CDRLOC (*lloc); |
1bbd0b84 | 3356 | SCM_ASSERT (scm_ilength (SCM_CAR (*lloc)) >= 0, lst, SCM_ARG1, FUNC_NAME); |
0f2d19dd JB |
3357 | *lloc = SCM_CAR (*lloc); |
3358 | return lst; | |
3359 | } | |
1bbd0b84 | 3360 | #undef FUNC_NAME |
0f2d19dd JB |
3361 | |
3362 | #endif /* !DEVAL */ | |
3363 | ||
6dbd0af5 MD |
3364 | |
3365 | /* SECTION: When DEVAL is defined this code yields scm_dapply. | |
3366 | * It is compiled twice. | |
3367 | */ | |
3368 | ||
0f2d19dd | 3369 | #if 0 |
1cc91f1b | 3370 | |
0f2d19dd | 3371 | SCM |
6e8d25a6 | 3372 | scm_apply (SCM proc, SCM arg1, SCM args) |
0f2d19dd JB |
3373 | {} |
3374 | #endif | |
3375 | ||
3376 | #if 0 | |
1cc91f1b | 3377 | |
0f2d19dd | 3378 | SCM |
6e8d25a6 GB |
3379 | scm_dapply (SCM proc, SCM arg1, SCM args) |
3380 | { /* empty */ } | |
0f2d19dd JB |
3381 | #endif |
3382 | ||
1cc91f1b | 3383 | |
82a2622a JB |
3384 | /* Apply a function to a list of arguments. |
3385 | ||
3386 | This function is exported to the Scheme level as taking two | |
3387 | required arguments and a tail argument, as if it were: | |
3388 | (lambda (proc arg1 . args) ...) | |
3389 | Thus, if you just have a list of arguments to pass to a procedure, | |
3390 | pass the list as ARG1, and '() for ARGS. If you have some fixed | |
3391 | args, pass the first as ARG1, then cons any remaining fixed args | |
3392 | onto the front of your argument list, and pass that as ARGS. */ | |
3393 | ||
0f2d19dd | 3394 | SCM |
1bbd0b84 | 3395 | SCM_APPLY (SCM proc, SCM arg1, SCM args) |
0f2d19dd JB |
3396 | { |
3397 | #ifdef DEBUG_EXTENSIONS | |
3398 | #ifdef DEVAL | |
92c2555f MV |
3399 | scm_t_debug_frame debug; |
3400 | scm_t_debug_info debug_vect_body; | |
1646d37b | 3401 | debug.prev = scm_last_debug_frame; |
b7ff98dd | 3402 | debug.status = SCM_APPLYFRAME; |
c0ab1b8d | 3403 | debug.vect = &debug_vect_body; |
6dbd0af5 MD |
3404 | debug.vect[0].a.proc = proc; |
3405 | debug.vect[0].a.args = SCM_EOL; | |
1646d37b | 3406 | scm_last_debug_frame = &debug; |
0f2d19dd | 3407 | #else |
b7ff98dd | 3408 | if (SCM_DEBUGGINGP) |
0f2d19dd JB |
3409 | return scm_dapply (proc, arg1, args); |
3410 | #endif | |
3411 | #endif | |
3412 | ||
3413 | SCM_ASRTGO (SCM_NIMP (proc), badproc); | |
82a2622a JB |
3414 | |
3415 | /* If ARGS is the empty list, then we're calling apply with only two | |
3416 | arguments --- ARG1 is the list of arguments for PROC. Whatever | |
3417 | the case, futz with things so that ARG1 is the first argument to | |
3418 | give to PROC (or SCM_UNDEFINED if no args), and ARGS contains the | |
30000774 JB |
3419 | rest. |
3420 | ||
3421 | Setting the debug apply frame args this way is pretty messy. | |
3422 | Perhaps we should store arg1 and args directly in the frame as | |
3423 | received, and let scm_frame_arguments unpack them, because that's | |
3424 | a relatively rare operation. This works for now; if the Guile | |
3425 | developer archives are still around, see Mikael's post of | |
3426 | 11-Apr-97. */ | |
0f2d19dd JB |
3427 | if (SCM_NULLP (args)) |
3428 | { | |
3429 | if (SCM_NULLP (arg1)) | |
30000774 JB |
3430 | { |
3431 | arg1 = SCM_UNDEFINED; | |
3432 | #ifdef DEVAL | |
3433 | debug.vect[0].a.args = SCM_EOL; | |
3434 | #endif | |
3435 | } | |
0f2d19dd JB |
3436 | else |
3437 | { | |
30000774 JB |
3438 | #ifdef DEVAL |
3439 | debug.vect[0].a.args = arg1; | |
3440 | #endif | |
0f2d19dd JB |
3441 | args = SCM_CDR (arg1); |
3442 | arg1 = SCM_CAR (arg1); | |
3443 | } | |
3444 | } | |
3445 | else | |
3446 | { | |
0f2d19dd | 3447 | args = scm_nconc2last (args); |
30000774 JB |
3448 | #ifdef DEVAL |
3449 | debug.vect[0].a.args = scm_cons (arg1, args); | |
3450 | #endif | |
0f2d19dd | 3451 | } |
0f2d19dd | 3452 | #ifdef DEVAL |
b6d75948 | 3453 | if (SCM_ENTER_FRAME_P && SCM_TRAPS_P) |
6dbd0af5 MD |
3454 | { |
3455 | SCM tmp; | |
b7ff98dd | 3456 | if (SCM_CHEAPTRAPS_P) |
c0ab1b8d | 3457 | tmp = scm_make_debugobj (&debug); |
6dbd0af5 MD |
3458 | else |
3459 | { | |
5f144b10 GH |
3460 | int first; |
3461 | ||
3462 | tmp = scm_make_continuation (&first); | |
3463 | if (!first) | |
6dbd0af5 MD |
3464 | goto entap; |
3465 | } | |
d95c0b76 NJ |
3466 | SCM_TRAPS_P = 0; |
3467 | scm_call_2 (SCM_ENTER_FRAME_HDLR, scm_sym_enter_frame, tmp); | |
3468 | SCM_TRAPS_P = 1; | |
6dbd0af5 MD |
3469 | } |
3470 | entap: | |
3471 | ENTER_APPLY; | |
3472 | #endif | |
6dbd0af5 | 3473 | tail: |
0f2d19dd JB |
3474 | switch (SCM_TYP7 (proc)) |
3475 | { | |
3476 | case scm_tc7_subr_2o: | |
3477 | args = SCM_NULLP (args) ? SCM_UNDEFINED : SCM_CAR (args); | |
3478 | RETURN (SCM_SUBRF (proc) (arg1, args)) | |
3479 | case scm_tc7_subr_2: | |
269861c7 MD |
3480 | SCM_ASRTGO (SCM_NNULLP (args) && SCM_NULLP (SCM_CDR (args)), |
3481 | wrongnumargs); | |
0f2d19dd JB |
3482 | args = SCM_CAR (args); |
3483 | RETURN (SCM_SUBRF (proc) (arg1, args)) | |
3484 | case scm_tc7_subr_0: | |
3485 | SCM_ASRTGO (SCM_UNBNDP (arg1), wrongnumargs); | |
3486 | RETURN (SCM_SUBRF (proc) ()) | |
3487 | case scm_tc7_subr_1: | |
41ee56dd | 3488 | SCM_ASRTGO (!SCM_UNBNDP (arg1), wrongnumargs); |
0f2d19dd JB |
3489 | case scm_tc7_subr_1o: |
3490 | SCM_ASRTGO (SCM_NULLP (args), wrongnumargs); | |
3491 | RETURN (SCM_SUBRF (proc) (arg1)) | |
3492 | case scm_tc7_cxr: | |
90cd76d9 | 3493 | SCM_ASRTGO (!SCM_UNBNDP (arg1) && SCM_NULLP (args), wrongnumargs); |
0f2d19dd JB |
3494 | if (SCM_SUBRF (proc)) |
3495 | { | |
6dbd0af5 MD |
3496 | if (SCM_INUMP (arg1)) |
3497 | { | |
f8de44c1 | 3498 | RETURN (scm_make_real (SCM_DSUBRF (proc) ((double) SCM_INUM (arg1)))); |
6dbd0af5 | 3499 | } |
0f2d19dd | 3500 | SCM_ASRTGO (SCM_NIMP (arg1), floerr); |
6dbd0af5 MD |
3501 | if (SCM_REALP (arg1)) |
3502 | { | |
eb42e2f0 | 3503 | RETURN (scm_make_real (SCM_DSUBRF (proc) (SCM_REAL_VALUE (arg1)))); |
6dbd0af5 | 3504 | } |
0f2d19dd | 3505 | #ifdef SCM_BIGDIG |
26d5b9b4 | 3506 | if (SCM_BIGP (arg1)) |
1be6b49c | 3507 | RETURN (scm_make_real (SCM_DSUBRF (proc) (scm_i_big2dbl (arg1)))) |
0f2d19dd JB |
3508 | #endif |
3509 | floerr: | |
9de33deb | 3510 | SCM_WTA_DISPATCH_1 (*SCM_SUBR_GENERIC (proc), arg1, |
3db4adfc | 3511 | SCM_ARG1, SCM_SYMBOL_CHARS (SCM_SNAME (proc))); |
0f2d19dd | 3512 | } |
3201d763 | 3513 | proc = SCM_SNAME (proc); |
0f2d19dd | 3514 | { |
b5c2579a | 3515 | char *chrs = SCM_SYMBOL_CHARS (proc) + SCM_SYMBOL_LENGTH (proc) - 1; |
0f2d19dd JB |
3516 | while ('c' != *--chrs) |
3517 | { | |
0c95b57d | 3518 | SCM_ASSERT (SCM_CONSP (arg1), |
3db4adfc | 3519 | arg1, SCM_ARG1, SCM_SYMBOL_CHARS (proc)); |
0f2d19dd JB |
3520 | arg1 = ('a' == *chrs) ? SCM_CAR (arg1) : SCM_CDR (arg1); |
3521 | } | |
3522 | RETURN (arg1) | |
3523 | } | |
3524 | case scm_tc7_subr_3: | |
f1e06a96 MD |
3525 | SCM_ASRTGO (SCM_NNULLP (args) |
3526 | && SCM_NNULLP (SCM_CDR (args)) | |
3527 | && SCM_NULLP (SCM_CDDR (args)), | |
3528 | wrongnumargs); | |
0f2d19dd JB |
3529 | RETURN (SCM_SUBRF (proc) (arg1, SCM_CAR (args), SCM_CAR (SCM_CDR (args)))) |
3530 | case scm_tc7_lsubr: | |
3531 | #ifdef DEVAL | |
6dbd0af5 | 3532 | RETURN (SCM_SUBRF (proc) (SCM_UNBNDP (arg1) ? SCM_EOL : debug.vect[0].a.args)) |
0f2d19dd JB |
3533 | #else |
3534 | RETURN (SCM_SUBRF (proc) (SCM_UNBNDP (arg1) ? SCM_EOL : scm_cons (arg1, args))) | |
3535 | #endif | |
3536 | case scm_tc7_lsubr_2: | |
0c95b57d | 3537 | SCM_ASRTGO (SCM_CONSP (args), wrongnumargs); |
0f2d19dd JB |
3538 | RETURN (SCM_SUBRF (proc) (arg1, SCM_CAR (args), SCM_CDR (args))) |
3539 | case scm_tc7_asubr: | |
3540 | if (SCM_NULLP (args)) | |
3541 | RETURN (SCM_SUBRF (proc) (arg1, SCM_UNDEFINED)) | |
3542 | while (SCM_NIMP (args)) | |
3543 | { | |
3544 | SCM_ASSERT (SCM_CONSP (args), args, SCM_ARG2, "apply"); | |
3545 | arg1 = SCM_SUBRF (proc) (arg1, SCM_CAR (args)); | |
3546 | args = SCM_CDR (args); | |
3547 | } | |
3548 | RETURN (arg1); | |
3549 | case scm_tc7_rpsubr: | |
3550 | if (SCM_NULLP (args)) | |
3551 | RETURN (SCM_BOOL_T); | |
3552 | while (SCM_NIMP (args)) | |
3553 | { | |
3554 | SCM_ASSERT (SCM_CONSP (args), args, SCM_ARG2, "apply"); | |
3555 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg1, SCM_CAR (args)))) | |
3556 | RETURN (SCM_BOOL_F); | |
3557 | arg1 = SCM_CAR (args); | |
3558 | args = SCM_CDR (args); | |
3559 | } | |
3560 | RETURN (SCM_BOOL_T); | |
3561 | case scm_tcs_closures: | |
3562 | #ifdef DEVAL | |
6dbd0af5 | 3563 | arg1 = (SCM_UNBNDP (arg1) ? SCM_EOL : debug.vect[0].a.args); |
0f2d19dd JB |
3564 | #else |
3565 | arg1 = (SCM_UNBNDP (arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
3566 | #endif | |
cf7c17e9 | 3567 | #ifndef SCM_RECKLESS |
726d810a | 3568 | if (scm_badargsp (SCM_CLOSURE_FORMALS (proc), arg1)) |
0f2d19dd JB |
3569 | goto wrongnumargs; |
3570 | #endif | |
1609038c MD |
3571 | |
3572 | /* Copy argument list */ | |
3573 | if (SCM_IMP (arg1)) | |
3574 | args = arg1; | |
3575 | else | |
3576 | { | |
3577 | SCM tl = args = scm_cons (SCM_CAR (arg1), SCM_UNSPECIFIED); | |
cabe682c | 3578 | while (arg1 = SCM_CDR (arg1), SCM_CONSP (arg1)) |
1609038c MD |
3579 | { |
3580 | SCM_SETCDR (tl, scm_cons (SCM_CAR (arg1), | |
3581 | SCM_UNSPECIFIED)); | |
3582 | tl = SCM_CDR (tl); | |
3583 | } | |
3584 | SCM_SETCDR (tl, arg1); | |
3585 | } | |
3586 | ||
726d810a | 3587 | args = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), args, SCM_ENV (proc)); |
2ddb0920 | 3588 | proc = SCM_CDR (SCM_CODE (proc)); |
e791c18f MD |
3589 | again: |
3590 | arg1 = proc; | |
3591 | while (SCM_NNULLP (arg1 = SCM_CDR (arg1))) | |
2ddb0920 MD |
3592 | { |
3593 | if (SCM_IMP (SCM_CAR (proc))) | |
3594 | { | |
3595 | if (SCM_ISYMP (SCM_CAR (proc))) | |
3596 | { | |
3597 | proc = scm_m_expand_body (proc, args); | |
e791c18f | 3598 | goto again; |
2ddb0920 | 3599 | } |
5280aaca | 3600 | else |
17fa3fcf | 3601 | SCM_VALIDATE_NON_EMPTY_COMBINATION (SCM_CAR (proc)); |
2ddb0920 MD |
3602 | } |
3603 | else | |
e791c18f MD |
3604 | SCM_CEVAL (SCM_CAR (proc), args); |
3605 | proc = arg1; | |
2ddb0920 | 3606 | } |
e791c18f | 3607 | RETURN (EVALCAR (proc, args)); |
0717dfd8 | 3608 | case scm_tc7_smob: |
68b06924 | 3609 | if (!SCM_SMOB_APPLICABLE_P (proc)) |
0717dfd8 | 3610 | goto badproc; |
afa38f6e | 3611 | if (SCM_UNBNDP (arg1)) |
68b06924 | 3612 | RETURN (SCM_SMOB_APPLY_0 (proc)) |
afa38f6e | 3613 | else if (SCM_NULLP (args)) |
68b06924 | 3614 | RETURN (SCM_SMOB_APPLY_1 (proc, arg1)) |
0717dfd8 | 3615 | else if (SCM_NULLP (SCM_CDR (args))) |
68b06924 | 3616 | RETURN (SCM_SMOB_APPLY_2 (proc, arg1, SCM_CAR (args))) |
0717dfd8 | 3617 | else |
68b06924 | 3618 | RETURN (SCM_SMOB_APPLY_3 (proc, arg1, SCM_CAR (args), SCM_CDR (args))); |
0f2d19dd JB |
3619 | case scm_tc7_cclo: |
3620 | #ifdef DEVAL | |
6dbd0af5 MD |
3621 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : debug.vect[0].a.args); |
3622 | arg1 = proc; | |
3623 | proc = SCM_CCLO_SUBR (proc); | |
3624 | debug.vect[0].a.proc = proc; | |
3625 | debug.vect[0].a.args = scm_cons (arg1, args); | |
0f2d19dd JB |
3626 | #else |
3627 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
0f2d19dd JB |
3628 | arg1 = proc; |
3629 | proc = SCM_CCLO_SUBR (proc); | |
6dbd0af5 | 3630 | #endif |
0f2d19dd | 3631 | goto tail; |
89efbff4 MD |
3632 | case scm_tc7_pws: |
3633 | proc = SCM_PROCEDURE (proc); | |
3634 | #ifdef DEVAL | |
3635 | debug.vect[0].a.proc = proc; | |
3636 | #endif | |
3637 | goto tail; | |
86d31dfe | 3638 | case scm_tcs_cons_gloc: /* really structs, not glocs */ |
f3d2630a MD |
3639 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) |
3640 | { | |
3641 | #ifdef DEVAL | |
3642 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : debug.vect[0].a.args); | |
3643 | #else | |
3644 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
3645 | #endif | |
195847fa | 3646 | RETURN (scm_apply_generic (proc, args)); |
f3d2630a MD |
3647 | } |
3648 | else if (!SCM_I_OPERATORP (proc)) | |
9b07e212 MD |
3649 | goto badproc; |
3650 | else | |
da7f71d7 MD |
3651 | { |
3652 | #ifdef DEVAL | |
3653 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : debug.vect[0].a.args); | |
3654 | #else | |
3655 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
3656 | #endif | |
3657 | arg1 = proc; | |
195847fa MD |
3658 | proc = (SCM_I_ENTITYP (proc) |
3659 | ? SCM_ENTITY_PROCEDURE (proc) | |
3660 | : SCM_OPERATOR_PROCEDURE (proc)); | |
da7f71d7 MD |
3661 | #ifdef DEVAL |
3662 | debug.vect[0].a.proc = proc; | |
3663 | debug.vect[0].a.args = scm_cons (arg1, args); | |
3664 | #endif | |
195847fa MD |
3665 | if (SCM_NIMP (proc)) |
3666 | goto tail; | |
3667 | else | |
3668 | goto badproc; | |
da7f71d7 | 3669 | } |
0f2d19dd | 3670 | wrongnumargs: |
f5bf2977 | 3671 | scm_wrong_num_args (proc); |
0f2d19dd JB |
3672 | default: |
3673 | badproc: | |
db4b4ca6 | 3674 | scm_wrong_type_arg ("apply", SCM_ARG1, proc); |
0f2d19dd JB |
3675 | RETURN (arg1); |
3676 | } | |
3677 | #ifdef DEVAL | |
6dbd0af5 | 3678 | exit: |
b6d75948 | 3679 | if (CHECK_EXIT && SCM_TRAPS_P) |
b7ff98dd | 3680 | if (SCM_EXIT_FRAME_P || (SCM_TRACE_P && SCM_TRACED_FRAME_P (debug))) |
6dbd0af5 | 3681 | { |
b7ff98dd MD |
3682 | SCM_CLEAR_TRACED_FRAME (debug); |
3683 | if (SCM_CHEAPTRAPS_P) | |
c0ab1b8d | 3684 | arg1 = scm_make_debugobj (&debug); |
6dbd0af5 MD |
3685 | else |
3686 | { | |
5f144b10 GH |
3687 | int first; |
3688 | SCM val = scm_make_continuation (&first); | |
3689 | ||
3690 | if (first) | |
3691 | arg1 = val; | |
3692 | else | |
6dbd0af5 | 3693 | { |
5f144b10 | 3694 | proc = val; |
6dbd0af5 MD |
3695 | goto ret; |
3696 | } | |
3697 | } | |
d95c0b76 NJ |
3698 | SCM_TRAPS_P = 0; |
3699 | scm_call_3 (SCM_EXIT_FRAME_HDLR, scm_sym_exit_frame, arg1, proc); | |
3700 | SCM_TRAPS_P = 1; | |
6dbd0af5 MD |
3701 | } |
3702 | ret: | |
1646d37b | 3703 | scm_last_debug_frame = debug.prev; |
0f2d19dd JB |
3704 | return proc; |
3705 | #endif | |
3706 | } | |
3707 | ||
6dbd0af5 MD |
3708 | |
3709 | /* SECTION: The rest of this file is only read once. | |
3710 | */ | |
3711 | ||
0f2d19dd JB |
3712 | #ifndef DEVAL |
3713 | ||
d9c393f5 JB |
3714 | /* Typechecking for multi-argument MAP and FOR-EACH. |
3715 | ||
47c3f06d | 3716 | Verify that each element of the vector ARGV, except for the first, |
d9c393f5 | 3717 | is a proper list whose length is LEN. Attribute errors to WHO, |
47c3f06d | 3718 | and claim that the i'th element of ARGV is WHO's i+2'th argument. */ |
d9c393f5 | 3719 | static inline void |
47c3f06d | 3720 | check_map_args (SCM argv, |
c014a02e | 3721 | long len, |
47c3f06d MD |
3722 | SCM gf, |
3723 | SCM proc, | |
3724 | SCM args, | |
3725 | const char *who) | |
d9c393f5 | 3726 | { |
47c3f06d | 3727 | SCM *ve = SCM_VELTS (argv); |
c014a02e | 3728 | long i; |
d9c393f5 | 3729 | |
b5c2579a | 3730 | for (i = SCM_VECTOR_LENGTH (argv) - 1; i >= 1; i--) |
d9c393f5 | 3731 | { |
c014a02e | 3732 | long elt_len = scm_ilength (ve[i]); |
d9c393f5 JB |
3733 | |
3734 | if (elt_len < 0) | |
47c3f06d MD |
3735 | { |
3736 | if (gf) | |
3737 | scm_apply_generic (gf, scm_cons (proc, args)); | |
3738 | else | |
3739 | scm_wrong_type_arg (who, i + 2, ve[i]); | |
3740 | } | |
d9c393f5 JB |
3741 | |
3742 | if (elt_len != len) | |
3743 | scm_out_of_range (who, ve[i]); | |
3744 | } | |
3745 | ||
5d2b97cd | 3746 | scm_remember_upto_here_1 (argv); |
d9c393f5 JB |
3747 | } |
3748 | ||
3749 | ||
47c3f06d | 3750 | SCM_GPROC (s_map, "map", 2, 0, 1, scm_map, g_map); |
1cc91f1b | 3751 | |
368bf056 MD |
3752 | /* Note: Currently, scm_map applies PROC to the argument list(s) |
3753 | sequentially, starting with the first element(s). This is used in | |
8878f040 | 3754 | evalext.c where the Scheme procedure `map-in-order', which guarantees |
368bf056 | 3755 | sequential behaviour, is implemented using scm_map. If the |
8878f040 | 3756 | behaviour changes, we need to update `map-in-order'. |
368bf056 MD |
3757 | */ |
3758 | ||
0f2d19dd | 3759 | SCM |
1bbd0b84 | 3760 | scm_map (SCM proc, SCM arg1, SCM args) |
af45e3b0 | 3761 | #define FUNC_NAME s_map |
0f2d19dd | 3762 | { |
c014a02e | 3763 | long i, len; |
0f2d19dd JB |
3764 | SCM res = SCM_EOL; |
3765 | SCM *pres = &res; | |
3766 | SCM *ve = &args; /* Keep args from being optimized away. */ | |
3767 | ||
d9c393f5 | 3768 | len = scm_ilength (arg1); |
47c3f06d MD |
3769 | SCM_GASSERTn (len >= 0, |
3770 | g_map, scm_cons2 (proc, arg1, args), SCM_ARG2, s_map); | |
af45e3b0 | 3771 | SCM_VALIDATE_REST_ARGUMENT (args); |
0f2d19dd JB |
3772 | if (SCM_NULLP (args)) |
3773 | { | |
3774 | while (SCM_NIMP (arg1)) | |
3775 | { | |
47c3f06d MD |
3776 | *pres = scm_cons (scm_apply (proc, SCM_CAR (arg1), scm_listofnull), |
3777 | SCM_EOL); | |
a23afe53 | 3778 | pres = SCM_CDRLOC (*pres); |
0f2d19dd JB |
3779 | arg1 = SCM_CDR (arg1); |
3780 | } | |
3781 | return res; | |
3782 | } | |
47c3f06d | 3783 | args = scm_vector (arg1 = scm_cons (arg1, args)); |
0f2d19dd | 3784 | ve = SCM_VELTS (args); |
cf7c17e9 | 3785 | #ifndef SCM_RECKLESS |
47c3f06d | 3786 | check_map_args (args, len, g_map, proc, arg1, s_map); |
0f2d19dd JB |
3787 | #endif |
3788 | while (1) | |
3789 | { | |
3790 | arg1 = SCM_EOL; | |
b5c2579a | 3791 | for (i = SCM_VECTOR_LENGTH (args) - 1; i >= 0; i--) |
0f2d19dd | 3792 | { |
d9c393f5 JB |
3793 | if (SCM_IMP (ve[i])) |
3794 | return res; | |
0f2d19dd JB |
3795 | arg1 = scm_cons (SCM_CAR (ve[i]), arg1); |
3796 | ve[i] = SCM_CDR (ve[i]); | |
3797 | } | |
3798 | *pres = scm_cons (scm_apply (proc, arg1, SCM_EOL), SCM_EOL); | |
a23afe53 | 3799 | pres = SCM_CDRLOC (*pres); |
0f2d19dd JB |
3800 | } |
3801 | } | |
af45e3b0 | 3802 | #undef FUNC_NAME |
0f2d19dd JB |
3803 | |
3804 | ||
47c3f06d | 3805 | SCM_GPROC (s_for_each, "for-each", 2, 0, 1, scm_for_each, g_for_each); |
1cc91f1b | 3806 | |
0f2d19dd | 3807 | SCM |
1bbd0b84 | 3808 | scm_for_each (SCM proc, SCM arg1, SCM args) |
af45e3b0 | 3809 | #define FUNC_NAME s_for_each |
0f2d19dd JB |
3810 | { |
3811 | SCM *ve = &args; /* Keep args from being optimized away. */ | |
c014a02e | 3812 | long i, len; |
d9c393f5 | 3813 | len = scm_ilength (arg1); |
47c3f06d MD |
3814 | SCM_GASSERTn (len >= 0, g_for_each, scm_cons2 (proc, arg1, args), |
3815 | SCM_ARG2, s_for_each); | |
af45e3b0 | 3816 | SCM_VALIDATE_REST_ARGUMENT (args); |
0f2d19dd JB |
3817 | if SCM_NULLP (args) |
3818 | { | |
3819 | while SCM_NIMP (arg1) | |
3820 | { | |
0f2d19dd JB |
3821 | scm_apply (proc, SCM_CAR (arg1), scm_listofnull); |
3822 | arg1 = SCM_CDR (arg1); | |
3823 | } | |
3824 | return SCM_UNSPECIFIED; | |
3825 | } | |
47c3f06d | 3826 | args = scm_vector (arg1 = scm_cons (arg1, args)); |
0f2d19dd | 3827 | ve = SCM_VELTS (args); |
cf7c17e9 | 3828 | #ifndef SCM_RECKLESS |
47c3f06d | 3829 | check_map_args (args, len, g_for_each, proc, arg1, s_for_each); |
0f2d19dd JB |
3830 | #endif |
3831 | while (1) | |
3832 | { | |
3833 | arg1 = SCM_EOL; | |
b5c2579a | 3834 | for (i = SCM_VECTOR_LENGTH (args) - 1; i >= 0; i--) |
0f2d19dd JB |
3835 | { |
3836 | if SCM_IMP | |
3837 | (ve[i]) return SCM_UNSPECIFIED; | |
3838 | arg1 = scm_cons (SCM_CAR (ve[i]), arg1); | |
3839 | ve[i] = SCM_CDR (ve[i]); | |
3840 | } | |
3841 | scm_apply (proc, arg1, SCM_EOL); | |
3842 | } | |
3843 | } | |
af45e3b0 | 3844 | #undef FUNC_NAME |
0f2d19dd | 3845 | |
1cc91f1b | 3846 | |
0f2d19dd | 3847 | SCM |
6e8d25a6 | 3848 | scm_closure (SCM code, SCM env) |
0f2d19dd JB |
3849 | { |
3850 | register SCM z; | |
86d31dfe | 3851 | |
0f2d19dd JB |
3852 | SCM_NEWCELL (z); |
3853 | SCM_SETCODE (z, code); | |
a23afe53 | 3854 | SCM_SETENV (z, env); |
0f2d19dd JB |
3855 | return z; |
3856 | } | |
3857 | ||
3858 | ||
92c2555f | 3859 | scm_t_bits scm_tc16_promise; |
1cc91f1b | 3860 | |
0f2d19dd | 3861 | SCM |
6e8d25a6 | 3862 | scm_makprom (SCM code) |
0f2d19dd | 3863 | { |
cf498326 | 3864 | SCM_RETURN_NEWSMOB (scm_tc16_promise, SCM_UNPACK (code)); |
0f2d19dd JB |
3865 | } |
3866 | ||
3867 | ||
1cc91f1b | 3868 | |
0f2d19dd | 3869 | static int |
e841c3e0 | 3870 | promise_print (SCM exp, SCM port, scm_print_state *pstate) |
0f2d19dd | 3871 | { |
19402679 | 3872 | int writingp = SCM_WRITINGP (pstate); |
b7f3516f | 3873 | scm_puts ("#<promise ", port); |
19402679 | 3874 | SCM_SET_WRITINGP (pstate, 1); |
729dbac3 | 3875 | scm_iprin1 (SCM_CELL_OBJECT_1 (exp), port, pstate); |
19402679 | 3876 | SCM_SET_WRITINGP (pstate, writingp); |
b7f3516f | 3877 | scm_putc ('>', port); |
0f2d19dd JB |
3878 | return !0; |
3879 | } | |
3880 | ||
3881 | ||
3b3b36dd | 3882 | SCM_DEFINE (scm_force, "force", 1, 0, 0, |
67e8151b MG |
3883 | (SCM x), |
3884 | "If the promise @var{x} has not been computed yet, compute and\n" | |
3885 | "return @var{x}, otherwise just return the previously computed\n" | |
3886 | "value.") | |
1bbd0b84 | 3887 | #define FUNC_NAME s_scm_force |
0f2d19dd | 3888 | { |
445f675c DH |
3889 | SCM_VALIDATE_SMOB (1, x, promise); |
3890 | if (!((1L << 16) & SCM_CELL_WORD_0 (x))) | |
0f2d19dd | 3891 | { |
fdc28395 | 3892 | SCM ans = scm_call_0 (SCM_CELL_OBJECT_1 (x)); |
445f675c | 3893 | if (!((1L << 16) & SCM_CELL_WORD_0 (x))) |
0f2d19dd JB |
3894 | { |
3895 | SCM_DEFER_INTS; | |
445f675c DH |
3896 | SCM_SET_CELL_OBJECT_1 (x, ans); |
3897 | SCM_SET_CELL_WORD_0 (x, SCM_CELL_WORD_0 (x) | (1L << 16)); | |
0f2d19dd JB |
3898 | SCM_ALLOW_INTS; |
3899 | } | |
3900 | } | |
445f675c | 3901 | return SCM_CELL_OBJECT_1 (x); |
0f2d19dd | 3902 | } |
1bbd0b84 | 3903 | #undef FUNC_NAME |
0f2d19dd | 3904 | |
445f675c | 3905 | |
a1ec6916 | 3906 | SCM_DEFINE (scm_promise_p, "promise?", 1, 0, 0, |
67e8151b | 3907 | (SCM obj), |
b380b885 | 3908 | "Return true if @var{obj} is a promise, i.e. a delayed computation\n" |
7a095584 | 3909 | "(@pxref{Delayed evaluation,,,r5rs.info,The Revised^5 Report on Scheme}).") |
1bbd0b84 | 3910 | #define FUNC_NAME s_scm_promise_p |
0f2d19dd | 3911 | { |
67e8151b | 3912 | return SCM_BOOL (SCM_TYP16_PREDICATE (scm_tc16_promise, obj)); |
0f2d19dd | 3913 | } |
1bbd0b84 | 3914 | #undef FUNC_NAME |
0f2d19dd | 3915 | |
445f675c | 3916 | |
a1ec6916 | 3917 | SCM_DEFINE (scm_cons_source, "cons-source", 3, 0, 0, |
1bbd0b84 | 3918 | (SCM xorig, SCM x, SCM y), |
11768c04 NJ |
3919 | "Create and return a new pair whose car and cdr are @var{x} and @var{y}.\n" |
3920 | "Any source properties associated with @var{xorig} are also associated\n" | |
3921 | "with the new pair.") | |
1bbd0b84 | 3922 | #define FUNC_NAME s_scm_cons_source |
26d5b9b4 MD |
3923 | { |
3924 | SCM p, z; | |
3925 | SCM_NEWCELL (z); | |
445f675c DH |
3926 | SCM_SET_CELL_OBJECT_0 (z, x); |
3927 | SCM_SET_CELL_OBJECT_1 (z, y); | |
26d5b9b4 MD |
3928 | /* Copy source properties possibly associated with xorig. */ |
3929 | p = scm_whash_lookup (scm_source_whash, xorig); | |
445f675c | 3930 | if (!SCM_IMP (p)) |
26d5b9b4 MD |
3931 | scm_whash_insert (scm_source_whash, z, p); |
3932 | return z; | |
3933 | } | |
1bbd0b84 | 3934 | #undef FUNC_NAME |
26d5b9b4 | 3935 | |
445f675c | 3936 | |
a1ec6916 | 3937 | SCM_DEFINE (scm_copy_tree, "copy-tree", 1, 0, 0, |
1bbd0b84 | 3938 | (SCM obj), |
b380b885 MD |
3939 | "Recursively copy the data tree that is bound to @var{obj}, and return a\n" |
3940 | "pointer to the new data structure. @code{copy-tree} recurses down the\n" | |
3941 | "contents of both pairs and vectors (since both cons cells and vector\n" | |
3942 | "cells may point to arbitrary objects), and stops recursing when it hits\n" | |
3943 | "any other object.") | |
1bbd0b84 | 3944 | #define FUNC_NAME s_scm_copy_tree |
0f2d19dd JB |
3945 | { |
3946 | SCM ans, tl; | |
26d5b9b4 | 3947 | if (SCM_IMP (obj)) |
ff467021 | 3948 | return obj; |
3910272e MD |
3949 | if (SCM_VECTORP (obj)) |
3950 | { | |
c014a02e | 3951 | unsigned long i = SCM_VECTOR_LENGTH (obj); |
00ffa0e7 | 3952 | ans = scm_c_make_vector (i, SCM_UNSPECIFIED); |
3910272e MD |
3953 | while (i--) |
3954 | SCM_VELTS (ans)[i] = scm_copy_tree (SCM_VELTS (obj)[i]); | |
3955 | return ans; | |
3956 | } | |
ff467021 | 3957 | if (SCM_NCONSP (obj)) |
0f2d19dd | 3958 | return obj; |
26d5b9b4 MD |
3959 | ans = tl = scm_cons_source (obj, |
3960 | scm_copy_tree (SCM_CAR (obj)), | |
3961 | SCM_UNSPECIFIED); | |
cabe682c | 3962 | while (obj = SCM_CDR (obj), SCM_CONSP (obj)) |
a23afe53 MD |
3963 | { |
3964 | SCM_SETCDR (tl, scm_cons (scm_copy_tree (SCM_CAR (obj)), | |
3965 | SCM_UNSPECIFIED)); | |
3966 | tl = SCM_CDR (tl); | |
3967 | } | |
3968 | SCM_SETCDR (tl, obj); | |
0f2d19dd JB |
3969 | return ans; |
3970 | } | |
1bbd0b84 | 3971 | #undef FUNC_NAME |
0f2d19dd | 3972 | |
1cc91f1b | 3973 | |
4163eb72 MV |
3974 | /* We have three levels of EVAL here: |
3975 | ||
3976 | - scm_i_eval (exp, env) | |
3977 | ||
3978 | evaluates EXP in environment ENV. ENV is a lexical environment | |
3979 | structure as used by the actual tree code evaluator. When ENV is | |
3980 | a top-level environment, then changes to the current module are | |
a513ead3 | 3981 | tracked by updating ENV so that it continues to be in sync with |
4163eb72 MV |
3982 | the current module. |
3983 | ||
3984 | - scm_primitive_eval (exp) | |
3985 | ||
3986 | evaluates EXP in the top-level environment as determined by the | |
3987 | current module. This is done by constructing a suitable | |
3988 | environment and calling scm_i_eval. Thus, changes to the | |
3989 | top-level module are tracked normally. | |
3990 | ||
3991 | - scm_eval (exp, mod) | |
3992 | ||
a513ead3 | 3993 | evaluates EXP while MOD is the current module. This is done by |
4163eb72 MV |
3994 | setting the current module to MOD, invoking scm_primitive_eval on |
3995 | EXP, and then restoring the current module to the value it had | |
3996 | previously. That is, while EXP is evaluated, changes to the | |
3997 | current module are tracked, but these changes do not persist when | |
3998 | scm_eval returns. | |
3999 | ||
4000 | For each level of evals, there are two variants, distinguished by a | |
4001 | _x suffix: the ordinary variant does not modify EXP while the _x | |
4002 | variant can destructively modify EXP into something completely | |
4003 | unintelligible. A Scheme data structure passed as EXP to one of the | |
4004 | _x variants should not ever be used again for anything. So when in | |
4005 | doubt, use the ordinary variant. | |
4006 | ||
4007 | */ | |
4008 | ||
0f2d19dd | 4009 | SCM |
68d8be66 | 4010 | scm_i_eval_x (SCM exp, SCM env) |
0f2d19dd | 4011 | { |
68d8be66 | 4012 | return SCM_XEVAL (exp, env); |
0f2d19dd JB |
4013 | } |
4014 | ||
68d8be66 MD |
4015 | SCM |
4016 | scm_i_eval (SCM exp, SCM env) | |
4017 | { | |
26fb6390 | 4018 | exp = scm_copy_tree (exp); |
e37a4fba | 4019 | return SCM_XEVAL (exp, env); |
68d8be66 MD |
4020 | } |
4021 | ||
4022 | SCM | |
4163eb72 | 4023 | scm_primitive_eval_x (SCM exp) |
0f2d19dd | 4024 | { |
a513ead3 | 4025 | SCM env; |
bcdab802 | 4026 | SCM transformer = scm_current_module_transformer (); |
a513ead3 | 4027 | if (SCM_NIMP (transformer)) |
fdc28395 | 4028 | exp = scm_call_1 (transformer, exp); |
a513ead3 | 4029 | env = scm_top_level_env (scm_current_module_lookup_closure ()); |
4163eb72 | 4030 | return scm_i_eval_x (exp, env); |
0f2d19dd JB |
4031 | } |
4032 | ||
4163eb72 MV |
4033 | SCM_DEFINE (scm_primitive_eval, "primitive-eval", 1, 0, 0, |
4034 | (SCM exp), | |
2069af38 | 4035 | "Evaluate @var{exp} in the top-level environment specified by\n" |
4163eb72 MV |
4036 | "the current module.") |
4037 | #define FUNC_NAME s_scm_primitive_eval | |
4038 | { | |
a513ead3 | 4039 | SCM env; |
bcdab802 | 4040 | SCM transformer = scm_current_module_transformer (); |
a513ead3 | 4041 | if (SCM_NIMP (transformer)) |
fdc28395 | 4042 | exp = scm_call_1 (transformer, exp); |
a513ead3 | 4043 | env = scm_top_level_env (scm_current_module_lookup_closure ()); |
4163eb72 MV |
4044 | return scm_i_eval (exp, env); |
4045 | } | |
4046 | #undef FUNC_NAME | |
4047 | ||
68d8be66 MD |
4048 | /* Eval does not take the second arg optionally. This is intentional |
4049 | * in order to be R5RS compatible, and to prepare for the new module | |
4050 | * system, where we would like to make the choice of evaluation | |
4163eb72 | 4051 | * environment explicit. */ |
549e6ec6 | 4052 | |
09074dbf DH |
4053 | static void |
4054 | change_environment (void *data) | |
4055 | { | |
4056 | SCM pair = SCM_PACK (data); | |
4057 | SCM new_module = SCM_CAR (pair); | |
aa767bc5 | 4058 | SCM old_module = scm_current_module (); |
09074dbf | 4059 | SCM_SETCDR (pair, old_module); |
aa767bc5 | 4060 | scm_set_current_module (new_module); |
09074dbf DH |
4061 | } |
4062 | ||
4063 | ||
09074dbf DH |
4064 | static void |
4065 | restore_environment (void *data) | |
4066 | { | |
4067 | SCM pair = SCM_PACK (data); | |
4068 | SCM old_module = SCM_CDR (pair); | |
aa767bc5 | 4069 | SCM new_module = scm_current_module (); |
2e9c835d | 4070 | SCM_SETCAR (pair, new_module); |
aa767bc5 | 4071 | scm_set_current_module (old_module); |
09074dbf DH |
4072 | } |
4073 | ||
4163eb72 MV |
4074 | static SCM |
4075 | inner_eval_x (void *data) | |
4076 | { | |
4077 | return scm_primitive_eval_x (SCM_PACK(data)); | |
4078 | } | |
4079 | ||
4080 | SCM | |
4081 | scm_eval_x (SCM exp, SCM module) | |
4082 | #define FUNC_NAME "eval!" | |
4083 | { | |
4084 | SCM_VALIDATE_MODULE (2, module); | |
4085 | ||
4086 | return scm_internal_dynamic_wind | |
4087 | (change_environment, inner_eval_x, restore_environment, | |
4088 | (void *) SCM_UNPACK (exp), | |
4089 | (void *) SCM_UNPACK (scm_cons (module, SCM_BOOL_F))); | |
4090 | } | |
4091 | #undef FUNC_NAME | |
4092 | ||
4093 | static SCM | |
4094 | inner_eval (void *data) | |
4095 | { | |
4096 | return scm_primitive_eval (SCM_PACK(data)); | |
4097 | } | |
09074dbf | 4098 | |
68d8be66 | 4099 | SCM_DEFINE (scm_eval, "eval", 2, 0, 0, |
4163eb72 MV |
4100 | (SCM exp, SCM module), |
4101 | "Evaluate @var{exp}, a list representing a Scheme expression,\n" | |
4102 | "in the top-level environment specified by @var{module}.\n" | |
4103 | "While @var{exp} is evaluated (using @var{primitive-eval}),\n" | |
4104 | "@var{module} is made the current module. The current module\n" | |
4105 | "is reset to its previous value when @var{eval} returns.") | |
1bbd0b84 | 4106 | #define FUNC_NAME s_scm_eval |
0f2d19dd | 4107 | { |
4163eb72 | 4108 | SCM_VALIDATE_MODULE (2, module); |
09074dbf DH |
4109 | |
4110 | return scm_internal_dynamic_wind | |
4111 | (change_environment, inner_eval, restore_environment, | |
4163eb72 MV |
4112 | (void *) SCM_UNPACK (exp), |
4113 | (void *) SCM_UNPACK (scm_cons (module, SCM_BOOL_F))); | |
0f2d19dd | 4114 | } |
1bbd0b84 | 4115 | #undef FUNC_NAME |
0f2d19dd | 4116 | |
68d8be66 | 4117 | #if (SCM_DEBUG_DEPRECATED == 0) |
1cc91f1b | 4118 | |
aa767bc5 | 4119 | /* Use scm_current_module () or scm_interaction_environment () |
68d8be66 MD |
4120 | * instead. The former is the module selected during loading of code. |
4121 | * The latter is the module in which the user of this thread currently | |
4122 | * types expressions. | |
4123 | */ | |
4124 | ||
4125 | SCM scm_top_level_lookup_closure_var; | |
bcdab802 | 4126 | SCM scm_system_transformer; |
68d8be66 MD |
4127 | |
4128 | /* Avoid using this functionality altogether (except for implementing | |
4129 | * libguile, where you can use scm_i_eval or scm_i_eval_x). | |
4130 | * | |
4163eb72 MV |
4131 | * Applications should use either C level scm_eval_x or Scheme |
4132 | * scm_eval; or scm_primitive_eval_x or scm_primitive_eval. */ | |
68d8be66 MD |
4133 | |
4134 | SCM | |
4135 | scm_eval_3 (SCM obj, int copyp, SCM env) | |
4136 | { | |
4137 | if (copyp) | |
4138 | return scm_i_eval (obj, env); | |
4139 | else | |
4140 | return scm_i_eval_x (obj, env); | |
4141 | } | |
4142 | ||
4143 | SCM_DEFINE (scm_eval2, "eval2", 2, 0, 0, | |
4144 | (SCM obj, SCM env_thunk), | |
4163eb72 MV |
4145 | "Evaluate @var{exp}, a Scheme expression, in the environment\n" |
4146 | "designated by @var{lookup}, a symbol-lookup function." | |
4147 | "Do not use this version of eval, it does not play well\n" | |
4148 | "with the module system. Use @code{eval} or\n" | |
4149 | "@code{primitive-eval} instead.") | |
68d8be66 | 4150 | #define FUNC_NAME s_scm_eval2 |
0f2d19dd | 4151 | { |
68d8be66 | 4152 | return scm_i_eval (obj, scm_top_level_env (env_thunk)); |
0f2d19dd | 4153 | } |
68d8be66 MD |
4154 | #undef FUNC_NAME |
4155 | ||
4156 | #endif /* DEPRECATED */ | |
0f2d19dd | 4157 | |
6dbd0af5 MD |
4158 | |
4159 | /* At this point, scm_deval and scm_dapply are generated. | |
4160 | */ | |
4161 | ||
0f2d19dd | 4162 | #ifdef DEBUG_EXTENSIONS |
6dbd0af5 MD |
4163 | # define DEVAL |
4164 | # include "eval.c" | |
0f2d19dd JB |
4165 | #endif |
4166 | ||
4167 | ||
1cc91f1b | 4168 | |
0f2d19dd JB |
4169 | void |
4170 | scm_init_eval () | |
0f2d19dd | 4171 | { |
33b97402 MD |
4172 | scm_init_opts (scm_evaluator_traps, |
4173 | scm_evaluator_trap_table, | |
4174 | SCM_N_EVALUATOR_TRAPS); | |
4175 | scm_init_opts (scm_eval_options_interface, | |
4176 | scm_eval_opts, | |
4177 | SCM_N_EVAL_OPTIONS); | |
4178 | ||
f99c9c28 MD |
4179 | scm_tc16_promise = scm_make_smob_type ("promise", 0); |
4180 | scm_set_smob_mark (scm_tc16_promise, scm_markcdr); | |
e841c3e0 | 4181 | scm_set_smob_print (scm_tc16_promise, promise_print); |
b8229a3b | 4182 | |
7c33806a DH |
4183 | /* Dirk:Fixme:: make scm_undefineds local to eval.c: it's only used here. */ |
4184 | scm_undefineds = scm_cons (SCM_UNDEFINED, SCM_EOL); | |
4185 | SCM_SETCDR (scm_undefineds, scm_undefineds); | |
4186 | scm_listofnull = scm_cons (SCM_EOL, SCM_EOL); | |
4187 | ||
9a441ddb | 4188 | scm_f_apply = scm_c_define_subr ("apply", scm_tc7_lsubr_2, scm_apply); |
0f2d19dd | 4189 | |
86d31dfe MV |
4190 | /* acros */ |
4191 | /* end of acros */ | |
4192 | ||
68d8be66 | 4193 | #if SCM_DEBUG_DEPRECATED == 0 |
dc19d1d2 | 4194 | scm_top_level_lookup_closure_var = |
86d31dfe | 4195 | scm_c_define ("*top-level-lookup-closure*", scm_make_fluid ()); |
bcdab802 | 4196 | scm_system_transformer = |
86d31dfe | 4197 | scm_c_define ("scm:eval-transformer", scm_make_fluid ()); |
68d8be66 | 4198 | #endif |
0f2d19dd | 4199 | |
8dc9439f | 4200 | #ifndef SCM_MAGIC_SNARFER |
a0599745 | 4201 | #include "libguile/eval.x" |
8dc9439f | 4202 | #endif |
25eaf21a | 4203 | |
86d31dfe | 4204 | scm_c_define ("nil", scm_lisp_nil); |
1385d8ae | 4205 | scm_c_define ("t", scm_lisp_t); |
86d31dfe | 4206 | |
25eaf21a | 4207 | scm_add_feature ("delay"); |
0f2d19dd | 4208 | } |
0f2d19dd | 4209 | |
6dbd0af5 | 4210 | #endif /* !DEVAL */ |
89e00824 ML |
4211 | |
4212 | /* | |
4213 | Local Variables: | |
4214 | c-file-style: "gnu" | |
4215 | End: | |
4216 | */ |