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1d15ecd3 | 1 | /* Copyright (C) 1995,1996,1997,1998,1999,2000,2001,2002 Free Software Foundation, Inc. |
0f2d19dd JB |
2 | * |
3 | * This program is free software; you can redistribute it and/or modify | |
4 | * it under the terms of the GNU General Public License as published by | |
5 | * the Free Software Foundation; either version 2, or (at your option) | |
6 | * any later version. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this software; see the file COPYING. If not, write to | |
82892bed JB |
15 | * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, |
16 | * Boston, MA 02111-1307 USA | |
0f2d19dd JB |
17 | * |
18 | * As a special exception, the Free Software Foundation gives permission | |
19 | * for additional uses of the text contained in its release of GUILE. | |
20 | * | |
21 | * The exception is that, if you link the GUILE library with other files | |
22 | * to produce an executable, this does not by itself cause the | |
23 | * resulting executable to be covered by the GNU General Public License. | |
24 | * Your use of that executable is in no way restricted on account of | |
25 | * linking the GUILE library code into it. | |
26 | * | |
27 | * This exception does not however invalidate any other reasons why | |
28 | * the executable file might be covered by the GNU General Public License. | |
29 | * | |
30 | * This exception applies only to the code released by the | |
31 | * Free Software Foundation under the name GUILE. If you copy | |
32 | * code from other Free Software Foundation releases into a copy of | |
33 | * GUILE, as the General Public License permits, the exception does | |
34 | * not apply to the code that you add in this way. To avoid misleading | |
35 | * anyone as to the status of such modified files, you must delete | |
36 | * this exception notice from them. | |
37 | * | |
38 | * If you write modifications of your own for GUILE, it is your choice | |
39 | * whether to permit this exception to apply to your modifications. | |
82892bed | 40 | * If you do not wish that, delete this exception notice. */ |
1bbd0b84 | 41 | |
0f2d19dd JB |
42 | \f |
43 | ||
6dbd0af5 MD |
44 | /* This file is read twice in order to produce debugging versions of |
45 | * scm_ceval and scm_apply. These functions, scm_deval and | |
46 | * scm_dapply, are produced when we define the preprocessor macro | |
47 | * DEVAL. The file is divided into sections which are treated | |
48 | * differently with respect to DEVAL. The heads of these sections are | |
49 | * marked with the string "SECTION:". | |
50 | */ | |
51 | ||
6dbd0af5 | 52 | /* SECTION: This code is compiled once. |
0f2d19dd JB |
53 | */ |
54 | ||
55 | #ifndef DEVAL | |
56 | ||
d16332b3 | 57 | /* We need this to get the definitions for HAVE_ALLOCA_H, etc. */ |
a0599745 | 58 | #include "libguile/scmconfig.h" |
d16332b3 | 59 | |
48b96f4b JB |
60 | /* AIX requires this to be the first thing in the file. The #pragma |
61 | directive is indented so pre-ANSI compilers will ignore it, rather | |
62 | than choke on it. */ | |
5862b540 | 63 | #ifndef __GNUC__ |
48b96f4b JB |
64 | # if HAVE_ALLOCA_H |
65 | # include <alloca.h> | |
66 | # else | |
67 | # ifdef _AIX | |
ac13d9d2 | 68 | # pragma alloca |
48b96f4b JB |
69 | # else |
70 | # ifndef alloca /* predefined by HP cc +Olibcalls */ | |
71 | char *alloca (); | |
72 | # endif | |
73 | # endif | |
74 | # endif | |
75 | #endif | |
76 | ||
a0599745 MD |
77 | #include "libguile/_scm.h" |
78 | #include "libguile/debug.h" | |
09074dbf | 79 | #include "libguile/dynwind.h" |
a0599745 MD |
80 | #include "libguile/alist.h" |
81 | #include "libguile/eq.h" | |
82 | #include "libguile/continuations.h" | |
83 | #include "libguile/throw.h" | |
84 | #include "libguile/smob.h" | |
85 | #include "libguile/macros.h" | |
86 | #include "libguile/procprop.h" | |
87 | #include "libguile/hashtab.h" | |
88 | #include "libguile/hash.h" | |
89 | #include "libguile/srcprop.h" | |
90 | #include "libguile/stackchk.h" | |
91 | #include "libguile/objects.h" | |
92 | #include "libguile/async.h" | |
93 | #include "libguile/feature.h" | |
94 | #include "libguile/modules.h" | |
95 | #include "libguile/ports.h" | |
96 | #include "libguile/root.h" | |
97 | #include "libguile/vectors.h" | |
549e6ec6 | 98 | #include "libguile/fluids.h" |
f12745b6 | 99 | #include "libguile/goops.h" |
a513ead3 | 100 | #include "libguile/values.h" |
a0599745 MD |
101 | |
102 | #include "libguile/validate.h" | |
103 | #include "libguile/eval.h" | |
c96d76b8 | 104 | #include "libguile/lang.h" |
89efbff4 | 105 | |
0f2d19dd JB |
106 | \f |
107 | ||
17fa3fcf DH |
108 | #define SCM_VALIDATE_NON_EMPTY_COMBINATION(x) \ |
109 | do { \ | |
110 | if (SCM_EQ_P ((x), SCM_EOL)) \ | |
111 | scm_misc_error (NULL, scm_s_expression, SCM_EOL); \ | |
112 | } while (0) | |
113 | ||
114 | \f | |
115 | ||
6dbd0af5 MD |
116 | /* The evaluator contains a plethora of EVAL symbols. |
117 | * This is an attempt at explanation. | |
118 | * | |
119 | * The following macros should be used in code which is read twice | |
120 | * (where the choice of evaluator is hard soldered): | |
121 | * | |
122 | * SCM_CEVAL is the symbol used within one evaluator to call itself. | |
123 | * Originally, it is defined to scm_ceval, but is redefined to | |
124 | * scm_deval during the second pass. | |
125 | * | |
6cb702da | 126 | * SCM_EVALIM is used when it is known that the expression is an |
6dbd0af5 MD |
127 | * immediate. (This macro never calls an evaluator.) |
128 | * | |
129 | * EVALCAR evaluates the car of an expression. | |
130 | * | |
6dbd0af5 MD |
131 | * The following macros should be used in code which is read once |
132 | * (where the choice of evaluator is dynamic): | |
133 | * | |
6cb702da | 134 | * SCM_XEVAL takes care of immediates without calling an evaluator. It |
6dbd0af5 MD |
135 | * then calls scm_ceval *or* scm_deval, depending on the debugging |
136 | * mode. | |
137 | * | |
6cb702da | 138 | * SCM_XEVALCAR corresponds to EVALCAR, but uses scm_ceval *or* scm_deval |
6dbd0af5 MD |
139 | * depending on the debugging mode. |
140 | * | |
141 | * The main motivation for keeping this plethora is efficiency | |
142 | * together with maintainability (=> locality of code). | |
143 | */ | |
144 | ||
6cb702da | 145 | #define SCM_CEVAL scm_ceval |
0f2d19dd | 146 | |
8c494e99 | 147 | #define EVALCAR(x, env) (SCM_IMP (SCM_CAR (x)) \ |
904a077d | 148 | ? SCM_EVALIM (SCM_CAR (x), env) \ |
680516ba DH |
149 | : (SCM_SYMBOLP (SCM_CAR (x)) \ |
150 | ? *scm_lookupcar (x, env, 1) \ | |
151 | : SCM_CEVAL (SCM_CAR (x), env))) | |
0f2d19dd | 152 | |
e2806c10 | 153 | #define EXTEND_ENV SCM_EXTEND_ENV |
0f2d19dd | 154 | |
0f2d19dd | 155 | SCM * |
6e8d25a6 | 156 | scm_ilookup (SCM iloc, SCM env) |
0f2d19dd | 157 | { |
c014a02e | 158 | register long ir = SCM_IFRAME (iloc); |
0f2d19dd JB |
159 | register SCM er = env; |
160 | for (; 0 != ir; --ir) | |
161 | er = SCM_CDR (er); | |
162 | er = SCM_CAR (er); | |
163 | for (ir = SCM_IDIST (iloc); 0 != ir; --ir) | |
164 | er = SCM_CDR (er); | |
165 | if (SCM_ICDRP (iloc)) | |
a23afe53 MD |
166 | return SCM_CDRLOC (er); |
167 | return SCM_CARLOC (SCM_CDR (er)); | |
0f2d19dd | 168 | } |
0f2d19dd | 169 | |
f8769b1d MV |
170 | #ifdef USE_THREADS |
171 | ||
172 | /* The Lookup Car Race | |
173 | - by Eva Luator | |
174 | ||
175 | Memoization of variables and special forms is done while executing | |
176 | the code for the first time. As long as there is only one thread | |
177 | everything is fine, but as soon as two threads execute the same | |
178 | code concurrently `for the first time' they can come into conflict. | |
179 | ||
180 | This memoization includes rewriting variable references into more | |
181 | efficient forms and expanding macros. Furthermore, macro expansion | |
182 | includes `compiling' special forms like `let', `cond', etc. into | |
183 | tree-code instructions. | |
184 | ||
185 | There shouldn't normally be a problem with memoizing local and | |
904a077d | 186 | global variable references (into ilocs and variables), because all |
f8769b1d MV |
187 | threads will mutate the code in *exactly* the same way and (if I |
188 | read the C code correctly) it is not possible to observe a half-way | |
189 | mutated cons cell. The lookup procedure can handle this | |
190 | transparently without any critical sections. | |
191 | ||
192 | It is different with macro expansion, because macro expansion | |
193 | happens outside of the lookup procedure and can't be | |
904a077d MV |
194 | undone. Therefore the lookup procedure can't cope with it. It has |
195 | to indicate failure when it detects a lost race and hope that the | |
196 | caller can handle it. Luckily, it turns out that this is the case. | |
f8769b1d | 197 | |
904a077d | 198 | An example to illustrate this: Suppose that the following form will |
f8769b1d MV |
199 | be memoized concurrently by two threads |
200 | ||
201 | (let ((x 12)) x) | |
202 | ||
203 | Let's first examine the lookup of X in the body. The first thread | |
204 | decides that it has to find the symbol "x" in the environment and | |
205 | starts to scan it. Then the other thread takes over and actually | |
206 | overtakes the first. It looks up "x" and substitutes an | |
207 | appropriate iloc for it. Now the first thread continues and | |
208 | completes its lookup. It comes to exactly the same conclusions as | |
209 | the second one and could - without much ado - just overwrite the | |
210 | iloc with the same iloc. | |
211 | ||
212 | But let's see what will happen when the race occurs while looking | |
213 | up the symbol "let" at the start of the form. It could happen that | |
214 | the second thread interrupts the lookup of the first thread and not | |
904a077d MV |
215 | only substitutes a variable for it but goes right ahead and |
216 | replaces it with the compiled form (#@let* (x 12) x). Now, when | |
217 | the first thread completes its lookup, it would replace the #@let* | |
218 | with a variable containing the "let" binding, effectively reverting | |
219 | the form to (let (x 12) x). This is wrong. It has to detect that | |
220 | it has lost the race and the evaluator has to reconsider the | |
221 | changed form completely. | |
f8769b1d MV |
222 | |
223 | This race condition could be resolved with some kind of traffic | |
224 | light (like mutexes) around scm_lookupcar, but I think that it is | |
225 | best to avoid them in this case. They would serialize memoization | |
226 | completely and because lookup involves calling arbitrary Scheme | |
227 | code (via the lookup-thunk), threads could be blocked for an | |
228 | arbitrary amount of time or even deadlock. But with the current | |
229 | solution a lot of unnecessary work is potentially done. */ | |
230 | ||
231 | /* SCM_LOOKUPCAR1 is was SCM_LOOKUPCAR used to be but is allowed to | |
232 | return NULL to indicate a failed lookup due to some race conditions | |
233 | between threads. This only happens when VLOC is the first cell of | |
234 | a special form that will eventually be memoized (like `let', etc.) | |
235 | In that case the whole lookup is bogus and the caller has to | |
236 | reconsider the complete special form. | |
237 | ||
238 | SCM_LOOKUPCAR is still there, of course. It just calls | |
de513fa0 | 239 | SCM_LOOKUPCAR1 and aborts on receiving NULL. So SCM_LOOKUPCAR |
f8769b1d MV |
240 | should only be called when it is known that VLOC is not the first |
241 | pair of a special form. Otherwise, use SCM_LOOKUPCAR1 and check | |
26d5b9b4 MD |
242 | for NULL. I think I've found the only places where this |
243 | applies. */ | |
f8769b1d MV |
244 | |
245 | #endif /* USE_THREADS */ | |
1cc91f1b | 246 | |
f25f761d GH |
247 | SCM_SYMBOL (scm_unbound_variable_key, "unbound-variable"); |
248 | ||
d0b7bad7 | 249 | #ifdef USE_THREADS |
8ecf1f13 | 250 | static SCM * |
26d5b9b4 | 251 | scm_lookupcar1 (SCM vloc, SCM genv, int check) |
d0b7bad7 MD |
252 | #else |
253 | SCM * | |
26d5b9b4 | 254 | scm_lookupcar (SCM vloc, SCM genv, int check) |
d0b7bad7 | 255 | #endif |
0f2d19dd JB |
256 | { |
257 | SCM env = genv; | |
e3173f93 | 258 | register SCM *al, fl, var = SCM_CAR (vloc); |
0f2d19dd | 259 | register SCM iloc = SCM_ILOC00; |
0f2d19dd JB |
260 | for (; SCM_NIMP (env); env = SCM_CDR (env)) |
261 | { | |
790071cd | 262 | if (!SCM_CONSP (SCM_CAR (env))) |
0f2d19dd | 263 | break; |
a23afe53 | 264 | al = SCM_CARLOC (env); |
0f2d19dd JB |
265 | for (fl = SCM_CAR (*al); SCM_NIMP (fl); fl = SCM_CDR (fl)) |
266 | { | |
01f11e02 | 267 | if (!SCM_CONSP (fl)) |
33b97402 | 268 | { |
cf498326 | 269 | if (SCM_EQ_P (fl, var)) |
0f2d19dd | 270 | { |
f8769b1d | 271 | #ifdef USE_THREADS |
cf498326 | 272 | if (! SCM_EQ_P (SCM_CAR (vloc), var)) |
f8769b1d MV |
273 | goto race; |
274 | #endif | |
3201d763 | 275 | SCM_SET_CELL_WORD_0 (vloc, SCM_UNPACK (iloc) + SCM_ICDR); |
a23afe53 | 276 | return SCM_CDRLOC (*al); |
0f2d19dd | 277 | } |
33b97402 MD |
278 | else |
279 | break; | |
280 | } | |
a23afe53 | 281 | al = SCM_CDRLOC (*al); |
cf498326 | 282 | if (SCM_EQ_P (SCM_CAR (fl), var)) |
0f2d19dd | 283 | { |
0f2d19dd JB |
284 | if (SCM_UNBNDP (SCM_CAR (*al))) |
285 | { | |
286 | env = SCM_EOL; | |
287 | goto errout; | |
288 | } | |
f8769b1d | 289 | #ifdef USE_THREADS |
c6772927 | 290 | if (!SCM_EQ_P (SCM_CAR (vloc), var)) |
f8769b1d | 291 | goto race; |
0f2d19dd | 292 | #endif |
a23afe53 | 293 | SCM_SETCAR (vloc, iloc); |
a23afe53 | 294 | return SCM_CARLOC (*al); |
0f2d19dd | 295 | } |
3201d763 | 296 | iloc = SCM_PACK (SCM_UNPACK (iloc) + SCM_IDINC); |
0f2d19dd | 297 | } |
3201d763 | 298 | iloc = SCM_PACK ((~SCM_IDSTMSK) & (SCM_UNPACK(iloc) + SCM_IFRINC)); |
0f2d19dd JB |
299 | } |
300 | { | |
86d31dfe | 301 | SCM top_thunk, real_var; |
790071cd | 302 | if (SCM_NIMP (env)) |
0f2d19dd | 303 | { |
86d31dfe MV |
304 | top_thunk = SCM_CAR (env); /* env now refers to a |
305 | top level env thunk */ | |
0f2d19dd JB |
306 | env = SCM_CDR (env); |
307 | } | |
308 | else | |
309 | top_thunk = SCM_BOOL_F; | |
86d31dfe MV |
310 | real_var = scm_sym2var (var, top_thunk, SCM_BOOL_F); |
311 | if (SCM_FALSEP (real_var)) | |
0f2d19dd | 312 | goto errout; |
86d31dfe | 313 | |
01f11e02 | 314 | if (!SCM_NULLP (env) || SCM_UNBNDP (SCM_VARIABLE_REF (real_var))) |
86d31dfe MV |
315 | { |
316 | errout: | |
86d31dfe MV |
317 | if (check) |
318 | { | |
319 | if (SCM_NULLP (env)) | |
320 | scm_error (scm_unbound_variable_key, NULL, | |
321 | "Unbound variable: ~S", | |
8ea46249 | 322 | scm_list_1 (var), SCM_BOOL_F); |
86d31dfe MV |
323 | else |
324 | scm_misc_error (NULL, "Damaged environment: ~S", | |
8ea46249 | 325 | scm_list_1 (var)); |
86d31dfe MV |
326 | } |
327 | else | |
328 | { | |
329 | /* A variable could not be found, but we shall | |
330 | not throw an error. */ | |
331 | static SCM undef_object = SCM_UNDEFINED; | |
332 | return &undef_object; | |
333 | } | |
09e4d064 | 334 | } |
86d31dfe | 335 | |
f8769b1d | 336 | #ifdef USE_THREADS |
c6772927 | 337 | if (!SCM_EQ_P (SCM_CAR (vloc), var)) |
86d31dfe MV |
338 | { |
339 | /* Some other thread has changed the very cell we are working | |
340 | on. In effect, it must have done our job or messed it up | |
341 | completely. */ | |
342 | race: | |
343 | var = SCM_CAR (vloc); | |
d22a0ea1 MV |
344 | if (SCM_VARIABLEP (var)) |
345 | return SCM_VARIABLE_LOC (var); | |
86d31dfe MV |
346 | if (SCM_ITAG7 (var) == SCM_ITAG7 (SCM_ILOC00)) |
347 | return scm_ilookup (var, genv); | |
904a077d | 348 | /* We can't cope with anything else than variables and ilocs. When |
86d31dfe MV |
349 | a special form has been memoized (i.e. `let' into `#@let') we |
350 | return NULL and expect the calling function to do the right | |
351 | thing. For the evaluator, this means going back and redoing | |
352 | the dispatch on the car of the form. */ | |
353 | return NULL; | |
354 | } | |
f8769b1d MV |
355 | #endif /* USE_THREADS */ |
356 | ||
d22a0ea1 | 357 | SCM_SETCAR (vloc, real_var); |
86d31dfe MV |
358 | return SCM_VARIABLE_LOC (real_var); |
359 | } | |
0f2d19dd JB |
360 | } |
361 | ||
f8769b1d MV |
362 | #ifdef USE_THREADS |
363 | SCM * | |
6e8d25a6 | 364 | scm_lookupcar (SCM vloc, SCM genv, int check) |
f8769b1d | 365 | { |
26d5b9b4 | 366 | SCM *loc = scm_lookupcar1 (vloc, genv, check); |
f8769b1d MV |
367 | if (loc == NULL) |
368 | abort (); | |
369 | return loc; | |
370 | } | |
f8769b1d MV |
371 | #endif |
372 | ||
0f2d19dd | 373 | #define unmemocar scm_unmemocar |
1cc91f1b | 374 | |
86d31dfe MV |
375 | SCM_SYMBOL (sym_three_question_marks, "???"); |
376 | ||
0f2d19dd | 377 | SCM |
6e8d25a6 | 378 | scm_unmemocar (SCM form, SCM env) |
0f2d19dd | 379 | { |
302c12b4 | 380 | if (!SCM_CONSP (form)) |
0f2d19dd | 381 | return form; |
302c12b4 | 382 | else |
d22a0ea1 | 383 | { |
302c12b4 DH |
384 | SCM c = SCM_CAR (form); |
385 | if (SCM_VARIABLEP (c)) | |
386 | { | |
387 | SCM sym = scm_module_reverse_lookup (scm_env_module (env), c); | |
388 | if (SCM_FALSEP (sym)) | |
389 | sym = sym_three_question_marks; | |
390 | SCM_SETCAR (form, sym); | |
391 | } | |
302c12b4 DH |
392 | else if (SCM_ILOCP (c)) |
393 | { | |
394 | unsigned long int ir; | |
395 | ||
396 | for (ir = SCM_IFRAME (c); ir != 0; --ir) | |
397 | env = SCM_CDR (env); | |
398 | env = SCM_CAAR (env); | |
399 | for (ir = SCM_IDIST (c); ir != 0; --ir) | |
400 | env = SCM_CDR (env); | |
401 | SCM_SETCAR (form, SCM_ICDRP (c) ? env : SCM_CAR (env)); | |
402 | } | |
302c12b4 DH |
403 | return form; |
404 | } | |
0f2d19dd JB |
405 | } |
406 | ||
1cc91f1b | 407 | |
0f2d19dd | 408 | SCM |
6e8d25a6 | 409 | scm_eval_car (SCM pair, SCM env) |
0f2d19dd | 410 | { |
6cb702da | 411 | return SCM_XEVALCAR (pair, env); |
0f2d19dd JB |
412 | } |
413 | ||
414 | \f | |
415 | /* | |
416 | * The following rewrite expressions and | |
417 | * some memoized forms have different syntax | |
418 | */ | |
419 | ||
3eeba8d4 JB |
420 | const char scm_s_expression[] = "missing or extra expression"; |
421 | const char scm_s_test[] = "bad test"; | |
422 | const char scm_s_body[] = "bad body"; | |
423 | const char scm_s_bindings[] = "bad bindings"; | |
185ab0ef | 424 | const char scm_s_duplicate_bindings[] = "duplicate bindings"; |
3eeba8d4 JB |
425 | const char scm_s_variable[] = "bad variable"; |
426 | const char scm_s_clauses[] = "bad or missing clauses"; | |
427 | const char scm_s_formals[] = "bad formals"; | |
5280aaca | 428 | const char scm_s_duplicate_formals[] = "duplicate formals"; |
302c12b4 | 429 | static const char s_splicing[] = "bad (non-list) result for unquote-splicing"; |
0f2d19dd | 430 | |
85db4a2c DH |
431 | SCM_GLOBAL_SYMBOL (scm_sym_dot, "."); |
432 | SCM_GLOBAL_SYMBOL (scm_sym_arrow, "=>"); | |
433 | SCM_GLOBAL_SYMBOL (scm_sym_else, "else"); | |
434 | SCM_GLOBAL_SYMBOL (scm_sym_unquote, "unquote"); | |
435 | SCM_GLOBAL_SYMBOL (scm_sym_uq_splicing, "unquote-splicing"); | |
81123e6d MD |
436 | |
437 | SCM scm_f_apply; | |
b8229a3b | 438 | |
6dbd0af5 | 439 | #ifdef DEBUG_EXTENSIONS |
85db4a2c DH |
440 | SCM_GLOBAL_SYMBOL (scm_sym_enter_frame, "enter-frame"); |
441 | SCM_GLOBAL_SYMBOL (scm_sym_apply_frame, "apply-frame"); | |
442 | SCM_GLOBAL_SYMBOL (scm_sym_exit_frame, "exit-frame"); | |
443 | SCM_GLOBAL_SYMBOL (scm_sym_trace, "trace"); | |
6dbd0af5 | 444 | #endif |
0f2d19dd | 445 | |
0f2d19dd | 446 | |
26d5b9b4 MD |
447 | /* Check that the body denoted by XORIG is valid and rewrite it into |
448 | its internal form. The internal form of a body is just the body | |
449 | itself, but prefixed with an ISYM that denotes to what kind of | |
450 | outer construct this body belongs. A lambda body starts with | |
451 | SCM_IM_LAMBDA, for example, a body of a let starts with SCM_IM_LET, | |
452 | etc. The one exception is a body that belongs to a letrec that has | |
453 | been formed by rewriting internal defines: it starts with | |
454 | SCM_IM_DEFINE. */ | |
455 | ||
456 | /* XXX - Besides controlling the rewriting of internal defines, the | |
457 | additional ISYM could be used for improved error messages. | |
458 | This is not done yet. */ | |
459 | ||
460 | static SCM | |
6e8d25a6 | 461 | scm_m_body (SCM op, SCM xorig, const char *what) |
26d5b9b4 | 462 | { |
302c12b4 | 463 | SCM_ASSYNT (scm_ilength (xorig) >= 1, scm_s_body, what); |
26d5b9b4 MD |
464 | |
465 | /* Don't add another ISYM if one is present already. */ | |
466 | if (SCM_ISYMP (SCM_CAR (xorig))) | |
467 | return xorig; | |
468 | ||
469 | /* Retain possible doc string. */ | |
44d3cb0d | 470 | if (!SCM_CONSP (SCM_CAR (xorig))) |
26d5b9b4 | 471 | { |
8ea46249 | 472 | if (!SCM_NULLP (SCM_CDR (xorig))) |
26d5b9b4 | 473 | return scm_cons (SCM_CAR (xorig), |
8ea46249 | 474 | scm_m_body (op, SCM_CDR (xorig), what)); |
26d5b9b4 MD |
475 | return xorig; |
476 | } | |
477 | ||
ab66ae47 | 478 | return scm_cons (op, xorig); |
26d5b9b4 MD |
479 | } |
480 | ||
1cc91f1b | 481 | |
8ea46249 DH |
482 | SCM_SYNTAX (s_quote, "quote", scm_makmmacro, scm_m_quote); |
483 | SCM_GLOBAL_SYMBOL (scm_sym_quote, s_quote); | |
484 | ||
485 | SCM | |
e81d98ec | 486 | scm_m_quote (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 487 | { |
160bb34a | 488 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, scm_s_expression, s_quote); |
302c12b4 | 489 | return scm_cons (SCM_IM_QUOTE, SCM_CDR (xorig)); |
0f2d19dd JB |
490 | } |
491 | ||
492 | ||
8ea46249 DH |
493 | SCM_SYNTAX (s_begin, "begin", scm_makmmacro, scm_m_begin); |
494 | SCM_GLOBAL_SYMBOL (scm_sym_begin, s_begin); | |
1cc91f1b | 495 | |
8ea46249 | 496 | SCM |
e81d98ec | 497 | scm_m_begin (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 498 | { |
b8113bc8 | 499 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) >= 0, scm_s_expression, s_begin); |
3a3111a8 | 500 | return scm_cons (SCM_IM_BEGIN, SCM_CDR (xorig)); |
0f2d19dd JB |
501 | } |
502 | ||
1cc91f1b | 503 | |
8ea46249 DH |
504 | SCM_SYNTAX (s_if, "if", scm_makmmacro, scm_m_if); |
505 | SCM_GLOBAL_SYMBOL (scm_sym_if, s_if); | |
506 | ||
507 | SCM | |
e81d98ec | 508 | scm_m_if (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 509 | { |
c014a02e | 510 | long len = scm_ilength (SCM_CDR (xorig)); |
c96d76b8 | 511 | SCM_ASSYNT (len >= 2 && len <= 3, scm_s_expression, s_if); |
3a3111a8 | 512 | return scm_cons (SCM_IM_IF, SCM_CDR (xorig)); |
0f2d19dd JB |
513 | } |
514 | ||
515 | ||
89efbff4 | 516 | /* Will go into the RnRS module when Guile is factorized. |
8ea46249 | 517 | SCM_SYNTAX (scm_s_set_x,"set!", scm_makmmacro, scm_m_set_x); */ |
89efbff4 | 518 | const char scm_s_set_x[] = "set!"; |
8ea46249 | 519 | SCM_GLOBAL_SYMBOL (scm_sym_set_x, scm_s_set_x); |
1cc91f1b | 520 | |
8ea46249 | 521 | SCM |
e81d98ec | 522 | scm_m_set_x (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 523 | { |
6dbd0af5 | 524 | SCM x = SCM_CDR (xorig); |
8ea46249 | 525 | SCM_ASSYNT (scm_ilength (x) == 2, scm_s_expression, scm_s_set_x); |
160bb34a | 526 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (x)), scm_s_variable, scm_s_set_x); |
3a3111a8 | 527 | return scm_cons (SCM_IM_SET_X, x); |
0f2d19dd JB |
528 | } |
529 | ||
530 | ||
8ea46249 DH |
531 | SCM_SYNTAX (s_and, "and", scm_makmmacro, scm_m_and); |
532 | SCM_GLOBAL_SYMBOL (scm_sym_and, s_and); | |
1cc91f1b | 533 | |
8ea46249 | 534 | SCM |
e81d98ec | 535 | scm_m_and (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 536 | { |
c014a02e | 537 | long len = scm_ilength (SCM_CDR (xorig)); |
160bb34a | 538 | SCM_ASSYNT (len >= 0, scm_s_test, s_and); |
0f2d19dd | 539 | if (len >= 1) |
3a3111a8 | 540 | return scm_cons (SCM_IM_AND, SCM_CDR (xorig)); |
0f2d19dd JB |
541 | else |
542 | return SCM_BOOL_T; | |
543 | } | |
544 | ||
1cc91f1b | 545 | |
8ea46249 DH |
546 | SCM_SYNTAX (s_or, "or", scm_makmmacro, scm_m_or); |
547 | SCM_GLOBAL_SYMBOL (scm_sym_or, s_or); | |
548 | ||
549 | SCM | |
e81d98ec | 550 | scm_m_or (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 551 | { |
c014a02e | 552 | long len = scm_ilength (SCM_CDR (xorig)); |
160bb34a | 553 | SCM_ASSYNT (len >= 0, scm_s_test, s_or); |
0f2d19dd | 554 | if (len >= 1) |
3a3111a8 | 555 | return scm_cons (SCM_IM_OR, SCM_CDR (xorig)); |
0f2d19dd JB |
556 | else |
557 | return SCM_BOOL_F; | |
558 | } | |
559 | ||
560 | ||
8ea46249 DH |
561 | SCM_SYNTAX (s_case, "case", scm_makmmacro, scm_m_case); |
562 | SCM_GLOBAL_SYMBOL (scm_sym_case, s_case); | |
1cc91f1b | 563 | |
8ea46249 | 564 | SCM |
e81d98ec | 565 | scm_m_case (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 566 | { |
8ea46249 DH |
567 | SCM clauses; |
568 | SCM cdrx = SCM_CDR (xorig); | |
569 | SCM_ASSYNT (scm_ilength (cdrx) >= 2, scm_s_clauses, s_case); | |
570 | clauses = SCM_CDR (cdrx); | |
571 | while (!SCM_NULLP (clauses)) | |
0f2d19dd | 572 | { |
8ea46249 DH |
573 | SCM clause = SCM_CAR (clauses); |
574 | SCM_ASSYNT (scm_ilength (clause) >= 2, scm_s_clauses, s_case); | |
575 | SCM_ASSYNT (scm_ilength (SCM_CAR (clause)) >= 0 | |
576 | || (SCM_EQ_P (scm_sym_else, SCM_CAR (clause)) | |
577 | && SCM_NULLP (SCM_CDR (clauses))), | |
160bb34a | 578 | scm_s_clauses, s_case); |
8ea46249 | 579 | clauses = SCM_CDR (clauses); |
0f2d19dd | 580 | } |
3a3111a8 | 581 | return scm_cons (SCM_IM_CASE, cdrx); |
0f2d19dd JB |
582 | } |
583 | ||
584 | ||
8ea46249 DH |
585 | SCM_SYNTAX (s_cond, "cond", scm_makmmacro, scm_m_cond); |
586 | SCM_GLOBAL_SYMBOL (scm_sym_cond, s_cond); | |
1cc91f1b | 587 | |
8ea46249 | 588 | SCM |
e81d98ec | 589 | scm_m_cond (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 590 | { |
8ea46249 DH |
591 | SCM cdrx = SCM_CDR (xorig); |
592 | SCM clauses = cdrx; | |
593 | SCM_ASSYNT (scm_ilength (clauses) >= 1, scm_s_clauses, s_cond); | |
594 | while (!SCM_NULLP (clauses)) | |
0f2d19dd | 595 | { |
8ea46249 DH |
596 | SCM clause = SCM_CAR (clauses); |
597 | long len = scm_ilength (clause); | |
160bb34a | 598 | SCM_ASSYNT (len >= 1, scm_s_clauses, s_cond); |
8ea46249 | 599 | if (SCM_EQ_P (scm_sym_else, SCM_CAR (clause))) |
0f2d19dd | 600 | { |
8ea46249 DH |
601 | int last_clause_p = SCM_NULLP (SCM_CDR (clauses)); |
602 | SCM_ASSYNT (len >= 2 && last_clause_p, "bad ELSE clause", s_cond); | |
0f2d19dd | 603 | } |
8ea46249 DH |
604 | else if (len >= 2 && SCM_EQ_P (scm_sym_arrow, SCM_CADR (clause))) |
605 | { | |
606 | SCM_ASSYNT (len > 2, "missing recipient", s_cond); | |
607 | SCM_ASSYNT (len == 3, "bad recipient", s_cond); | |
608 | } | |
609 | clauses = SCM_CDR (clauses); | |
0f2d19dd | 610 | } |
3a3111a8 | 611 | return scm_cons (SCM_IM_COND, cdrx); |
0f2d19dd JB |
612 | } |
613 | ||
1cc91f1b | 614 | |
8ea46249 DH |
615 | SCM_SYNTAX (s_lambda, "lambda", scm_makmmacro, scm_m_lambda); |
616 | SCM_GLOBAL_SYMBOL (scm_sym_lambda, s_lambda); | |
5280aaca | 617 | |
8ea46249 DH |
618 | /* Return true if OBJ is `eq?' to one of the elements of LIST or to the |
619 | * cdr of the last cons. (Thus, LIST is not required to be a proper | |
620 | * list and OBJ can also be found in the improper ending.) */ | |
5280aaca MV |
621 | static int |
622 | scm_c_improper_memq (SCM obj, SCM list) | |
623 | { | |
624 | for (; SCM_CONSP (list); list = SCM_CDR (list)) | |
625 | { | |
626 | if (SCM_EQ_P (SCM_CAR (list), obj)) | |
c6772927 | 627 | return 1; |
5280aaca MV |
628 | } |
629 | return SCM_EQ_P (list, obj); | |
630 | } | |
631 | ||
8ea46249 | 632 | SCM |
e81d98ec | 633 | scm_m_lambda (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 634 | { |
8ea46249 DH |
635 | SCM formals; |
636 | SCM x = SCM_CDR (xorig); | |
302c12b4 DH |
637 | |
638 | SCM_ASSYNT (SCM_CONSP (x), scm_s_formals, s_lambda); | |
8ea46249 DH |
639 | |
640 | formals = SCM_CAR (x); | |
641 | while (SCM_CONSP (formals)) | |
0f2d19dd | 642 | { |
8ea46249 DH |
643 | SCM formal = SCM_CAR (formals); |
644 | SCM_ASSYNT (SCM_SYMBOLP (formal), scm_s_formals, s_lambda); | |
645 | if (scm_c_improper_memq (formal, SCM_CDR (formals))) | |
db4b4ca6 | 646 | scm_misc_error (s_lambda, scm_s_duplicate_formals, SCM_EOL); |
8ea46249 | 647 | formals = SCM_CDR (formals); |
26d5b9b4 | 648 | } |
8ea46249 DH |
649 | if (!SCM_NULLP (formals) && !SCM_SYMBOLP (formals)) |
650 | scm_misc_error (s_lambda, scm_s_formals, SCM_EOL); | |
26d5b9b4 | 651 | |
3a3111a8 MD |
652 | return scm_cons2 (SCM_IM_LAMBDA, SCM_CAR (x), |
653 | scm_m_body (SCM_IM_LAMBDA, SCM_CDR (x), s_lambda)); | |
0f2d19dd JB |
654 | } |
655 | ||
656 | ||
8ea46249 DH |
657 | SCM_SYNTAX (s_letstar, "let*", scm_makmmacro, scm_m_letstar); |
658 | SCM_GLOBAL_SYMBOL (scm_sym_letstar, s_letstar); | |
1cc91f1b | 659 | |
8ea46249 DH |
660 | /* (let* ((v1 i1) (v2 i2) ...) body) with variables v1 .. vk and initializers |
661 | * i1 .. ik is transformed into the form (#@let* (v1 i1 v2 i2 ...) body*). */ | |
662 | SCM | |
e81d98ec | 663 | scm_m_letstar (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 664 | { |
8ea46249 DH |
665 | SCM bindings; |
666 | SCM x = SCM_CDR (xorig); | |
667 | SCM vars = SCM_EOL; | |
668 | SCM *varloc = &vars; | |
302c12b4 DH |
669 | |
670 | SCM_ASSYNT (SCM_CONSP (x), scm_s_bindings, s_letstar); | |
671 | ||
8ea46249 DH |
672 | bindings = SCM_CAR (x); |
673 | SCM_ASSYNT (scm_ilength (bindings) >= 0, scm_s_bindings, s_letstar); | |
674 | while (!SCM_NULLP (bindings)) | |
0f2d19dd | 675 | { |
8ea46249 DH |
676 | SCM binding = SCM_CAR (bindings); |
677 | SCM_ASSYNT (scm_ilength (binding) == 2, scm_s_bindings, s_letstar); | |
678 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (binding)), scm_s_variable, s_letstar); | |
679 | *varloc = scm_list_2 (SCM_CAR (binding), SCM_CADR (binding)); | |
a23afe53 | 680 | varloc = SCM_CDRLOC (SCM_CDR (*varloc)); |
8ea46249 | 681 | bindings = SCM_CDR (bindings); |
0f2d19dd | 682 | } |
302c12b4 | 683 | |
8ea46249 | 684 | return scm_cons2 (SCM_IM_LETSTAR, vars, |
3a3111a8 | 685 | scm_m_body (SCM_IM_LETSTAR, SCM_CDR (x), s_letstar)); |
0f2d19dd JB |
686 | } |
687 | ||
8ea46249 | 688 | |
302c12b4 DH |
689 | /* DO gets the most radically altered syntax. The order of the vars is |
690 | * reversed here. In contrast, the order of the inits and steps is reversed | |
691 | * during the evaluation: | |
692 | ||
0f2d19dd JB |
693 | (do ((<var1> <init1> <step1>) |
694 | (<var2> <init2>) | |
695 | ... ) | |
696 | (<test> <return>) | |
697 | <body>) | |
302c12b4 | 698 | |
0f2d19dd | 699 | ;; becomes |
302c12b4 DH |
700 | |
701 | (#@do (varn ... var2 var1) | |
0f2d19dd JB |
702 | (<init1> <init2> ... <initn>) |
703 | (<test> <return>) | |
704 | (<body>) | |
705 | <step1> <step2> ... <stepn>) ;; missing steps replaced by var | |
302c12b4 | 706 | */ |
0f2d19dd | 707 | |
b8229a3b | 708 | SCM_SYNTAX(s_do, "do", scm_makmmacro, scm_m_do); |
2f0d1375 | 709 | SCM_GLOBAL_SYMBOL(scm_sym_do, s_do); |
1cc91f1b | 710 | |
0f2d19dd | 711 | SCM |
e81d98ec | 712 | scm_m_do (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 713 | { |
8ea46249 DH |
714 | SCM bindings; |
715 | SCM x = SCM_CDR (xorig); | |
716 | SCM vars = SCM_EOL; | |
717 | SCM inits = SCM_EOL; | |
718 | SCM *initloc = &inits; | |
719 | SCM steps = SCM_EOL; | |
720 | SCM *steploc = &steps; | |
721 | SCM_ASSYNT (scm_ilength (x) >= 2, scm_s_test, "do"); | |
722 | bindings = SCM_CAR (x); | |
723 | SCM_ASSYNT (scm_ilength (bindings) >= 0, scm_s_bindings, "do"); | |
724 | while (!SCM_NULLP (bindings)) | |
0f2d19dd | 725 | { |
302c12b4 DH |
726 | SCM binding = SCM_CAR (bindings); |
727 | long len = scm_ilength (binding); | |
8ea46249 | 728 | SCM_ASSYNT (len == 2 || len == 3, scm_s_bindings, "do"); |
302c12b4 DH |
729 | { |
730 | SCM name = SCM_CAR (binding); | |
731 | SCM init = SCM_CADR (binding); | |
732 | SCM step = (len == 2) ? name : SCM_CADDR (binding); | |
733 | SCM_ASSYNT (SCM_SYMBOLP (name), scm_s_variable, "do"); | |
734 | vars = scm_cons (name, vars); | |
735 | *initloc = scm_list_1 (init); | |
736 | initloc = SCM_CDRLOC (*initloc); | |
737 | *steploc = scm_list_1 (step); | |
738 | steploc = SCM_CDRLOC (*steploc); | |
739 | bindings = SCM_CDR (bindings); | |
740 | } | |
0f2d19dd JB |
741 | } |
742 | x = SCM_CDR (x); | |
160bb34a | 743 | SCM_ASSYNT (scm_ilength (SCM_CAR (x)) >= 1, scm_s_test, "do"); |
0f2d19dd JB |
744 | x = scm_cons2 (SCM_CAR (x), SCM_CDR (x), steps); |
745 | x = scm_cons2 (vars, inits, x); | |
3a3111a8 | 746 | return scm_cons (SCM_IM_DO, x); |
0f2d19dd JB |
747 | } |
748 | ||
b8229a3b | 749 | |
302c12b4 DH |
750 | SCM_SYNTAX (s_quasiquote, "quasiquote", scm_makacro, scm_m_quasiquote); |
751 | SCM_GLOBAL_SYMBOL (scm_sym_quasiquote, s_quasiquote); | |
b8229a3b | 752 | |
302c12b4 DH |
753 | /* Internal function to handle a quasiquotation: 'form' is the parameter in |
754 | * the call (quasiquotation form), 'env' is the environment where unquoted | |
755 | * expressions will be evaluated, and 'depth' is the current quasiquotation | |
756 | * nesting level and is known to be greater than zero. */ | |
0f2d19dd | 757 | static SCM |
302c12b4 | 758 | iqq (SCM form, SCM env, unsigned long int depth) |
0f2d19dd | 759 | { |
302c12b4 DH |
760 | if (SCM_CONSP (form)) |
761 | { | |
762 | SCM tmp = SCM_CAR (form); | |
763 | if (SCM_EQ_P (tmp, scm_sym_quasiquote)) | |
764 | { | |
765 | SCM args = SCM_CDR (form); | |
766 | SCM_ASSYNT (scm_ilength (args) == 1, scm_s_expression, s_quasiquote); | |
767 | return scm_list_2 (tmp, iqq (SCM_CAR (args), env, depth + 1)); | |
768 | } | |
769 | else if (SCM_EQ_P (tmp, scm_sym_unquote)) | |
770 | { | |
771 | SCM args = SCM_CDR (form); | |
772 | SCM_ASSYNT (scm_ilength (args) == 1, scm_s_expression, s_quasiquote); | |
773 | if (depth - 1 == 0) | |
774 | return scm_eval_car (args, env); | |
775 | else | |
776 | return scm_list_2 (tmp, iqq (SCM_CAR (args), env, depth - 1)); | |
777 | } | |
778 | else if (SCM_CONSP (tmp) | |
779 | && SCM_EQ_P (SCM_CAR (tmp), scm_sym_uq_splicing)) | |
780 | { | |
781 | SCM args = SCM_CDR (tmp); | |
782 | SCM_ASSYNT (scm_ilength (args) == 1, scm_s_expression, s_quasiquote); | |
783 | if (depth - 1 == 0) | |
784 | { | |
785 | SCM list = scm_eval_car (args, env); | |
786 | SCM rest = SCM_CDR (form); | |
787 | SCM_ASSYNT (scm_ilength (list) >= 0, s_splicing, s_quasiquote); | |
788 | return scm_append (scm_list_2 (list, iqq (rest, env, depth))); | |
789 | } | |
790 | else | |
791 | return scm_cons (iqq (SCM_CAR (form), env, depth - 1), | |
792 | iqq (SCM_CDR (form), env, depth)); | |
793 | } | |
794 | else | |
795 | return scm_cons (iqq (SCM_CAR (form), env, depth), | |
796 | iqq (SCM_CDR (form), env, depth)); | |
797 | } | |
798 | else if (SCM_VECTORP (form)) | |
0f2d19dd | 799 | { |
302c12b4 | 800 | size_t i = SCM_VECTOR_LENGTH (form); |
34d19ef6 | 801 | SCM const *data = SCM_VELTS (form); |
302c12b4 DH |
802 | SCM tmp = SCM_EOL; |
803 | while (i != 0) | |
804 | tmp = scm_cons (data[--i], tmp); | |
805 | scm_remember_upto_here_1 (form); | |
0f2d19dd JB |
806 | return scm_vector (iqq (tmp, env, depth)); |
807 | } | |
302c12b4 | 808 | else |
ff467021 | 809 | return form; |
0f2d19dd JB |
810 | } |
811 | ||
302c12b4 DH |
812 | SCM |
813 | scm_m_quasiquote (SCM xorig, SCM env) | |
814 | { | |
815 | SCM x = SCM_CDR (xorig); | |
816 | SCM_ASSYNT (scm_ilength (x) == 1, scm_s_expression, s_quasiquote); | |
817 | return iqq (SCM_CAR (x), env, 1); | |
818 | } | |
819 | ||
0f2d19dd | 820 | |
a570e93a MD |
821 | SCM_SYNTAX (s_delay, "delay", scm_makmmacro, scm_m_delay); |
822 | SCM_GLOBAL_SYMBOL (scm_sym_delay, s_delay); | |
1cc91f1b | 823 | |
302c12b4 DH |
824 | /* Promises are implemented as closures with an empty parameter list. Thus, |
825 | * (delay <expression>) is transformed into (#@delay '() <expression>), where | |
826 | * the empty list represents the empty parameter list. This representation | |
827 | * allows for easy creation of the closure during evaluation. */ | |
828 | SCM | |
e81d98ec | 829 | scm_m_delay (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 830 | { |
160bb34a | 831 | SCM_ASSYNT (scm_ilength (xorig) == 2, scm_s_expression, s_delay); |
a570e93a | 832 | return scm_cons2 (SCM_IM_DELAY, SCM_EOL, SCM_CDR (xorig)); |
0f2d19dd JB |
833 | } |
834 | ||
1cc91f1b | 835 | |
b8229a3b | 836 | SCM_SYNTAX(s_define, "define", scm_makmmacro, scm_m_define); |
2f0d1375 | 837 | SCM_GLOBAL_SYMBOL(scm_sym_define, s_define); |
1cc91f1b | 838 | |
302c12b4 DH |
839 | /* Guile provides an extension to R5RS' define syntax to represent function |
840 | * currying in a compact way. With this extension, it is allowed to write | |
841 | * (define <nested-variable> <body>), where <nested-variable> has of one of | |
842 | * the forms (<nested-variable> <formals>), (<nested-variable> . <formal>), | |
843 | * (<variable> <formals>) or (<variable> . <formal>). As in R5RS, <formals> | |
844 | * should be either a sequence of zero or more variables, or a sequence of one | |
845 | * or more variables followed by a space-delimited period and another | |
846 | * variable. Each level of argument nesting wraps the <body> within another | |
847 | * lambda expression. For example, the following forms are allowed, each one | |
848 | * followed by an equivalent, more explicit implementation. | |
849 | * Example 1: | |
850 | * (define ((a b . c) . d) <body>) is equivalent to | |
851 | * (define a (lambda (b . c) (lambda d <body>))) | |
852 | * Example 2: | |
853 | * (define (((a) b) c . d) <body>) is equivalent to | |
854 | * (define a (lambda () (lambda (b) (lambda (c . d) <body>)))) | |
855 | */ | |
856 | /* Dirk:FIXME:: We should provide an implementation for 'define' in the R5RS | |
857 | * module that does not implement this extension. */ | |
858 | SCM | |
6e8d25a6 | 859 | scm_m_define (SCM x, SCM env) |
0f2d19dd | 860 | { |
302c12b4 | 861 | SCM name; |
0f2d19dd | 862 | x = SCM_CDR (x); |
160bb34a | 863 | SCM_ASSYNT (scm_ilength (x) >= 2, scm_s_expression, s_define); |
302c12b4 | 864 | name = SCM_CAR (x); |
0f2d19dd | 865 | x = SCM_CDR (x); |
302c12b4 DH |
866 | while (SCM_CONSP (name)) |
867 | { | |
868 | /* This while loop realizes function currying by variable nesting. */ | |
869 | SCM formals = SCM_CDR (name); | |
870 | x = scm_list_1 (scm_cons2 (scm_sym_lambda, formals, x)); | |
871 | name = SCM_CAR (name); | |
0f2d19dd | 872 | } |
302c12b4 DH |
873 | SCM_ASSYNT (SCM_SYMBOLP (name), scm_s_variable, s_define); |
874 | SCM_ASSYNT (scm_ilength (x) == 1, scm_s_expression, s_define); | |
0f2d19dd JB |
875 | if (SCM_TOP_LEVEL (env)) |
876 | { | |
302c12b4 DH |
877 | SCM var; |
878 | x = scm_eval_car (x, env); | |
879 | if (SCM_REC_PROCNAMES_P) | |
80ea260c | 880 | { |
302c12b4 DH |
881 | SCM tmp = x; |
882 | while (SCM_MACROP (tmp)) | |
883 | tmp = SCM_MACRO_CODE (tmp); | |
884 | if (SCM_CLOSUREP (tmp) | |
80ea260c | 885 | /* Only the first definition determines the name. */ |
302c12b4 DH |
886 | && SCM_FALSEP (scm_procedure_property (tmp, scm_sym_name))) |
887 | scm_set_procedure_property_x (tmp, scm_sym_name, name); | |
80ea260c | 888 | } |
302c12b4 DH |
889 | var = scm_sym2var (name, scm_env_top_level (env), SCM_BOOL_T); |
890 | SCM_VARIABLE_SET (var, x); | |
0f2d19dd | 891 | return SCM_UNSPECIFIED; |
0f2d19dd | 892 | } |
302c12b4 DH |
893 | else |
894 | return scm_cons2 (SCM_IM_DEFINE, name, x); | |
0f2d19dd | 895 | } |
6dbd0af5 | 896 | |
0f2d19dd | 897 | |
302c12b4 DH |
898 | /* The bindings ((v1 i1) (v2 i2) ... (vn in)) are transformed to the lists |
899 | * (vn ... v2 v1) and (i1 i2 ... in). That is, the list of variables is | |
900 | * reversed here, the list of inits gets reversed during evaluation. */ | |
901 | static void | |
902 | transform_bindings (SCM bindings, SCM *rvarloc, SCM *initloc, const char *what) | |
0f2d19dd | 903 | { |
302c12b4 DH |
904 | SCM rvars = SCM_EOL; |
905 | *rvarloc = SCM_EOL; | |
906 | *initloc = SCM_EOL; | |
907 | ||
908 | SCM_ASSYNT (scm_ilength (bindings) >= 1, scm_s_bindings, what); | |
0f2d19dd | 909 | |
0f2d19dd JB |
910 | do |
911 | { | |
302c12b4 DH |
912 | SCM binding = SCM_CAR (bindings); |
913 | SCM_ASSYNT (scm_ilength (binding) == 2, scm_s_bindings, what); | |
914 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (binding)), scm_s_variable, what); | |
915 | if (scm_c_improper_memq (SCM_CAR (binding), rvars)) | |
db4b4ca6 | 916 | scm_misc_error (what, scm_s_duplicate_bindings, SCM_EOL); |
302c12b4 DH |
917 | rvars = scm_cons (SCM_CAR (binding), rvars); |
918 | *initloc = scm_list_1 (SCM_CADR (binding)); | |
a23afe53 | 919 | initloc = SCM_CDRLOC (*initloc); |
302c12b4 | 920 | bindings = SCM_CDR (bindings); |
0f2d19dd | 921 | } |
302c12b4 | 922 | while (!SCM_NULLP (bindings)); |
26d5b9b4 | 923 | |
302c12b4 | 924 | *rvarloc = rvars; |
0f2d19dd JB |
925 | } |
926 | ||
302c12b4 | 927 | |
26d5b9b4 | 928 | SCM_SYNTAX(s_letrec, "letrec", scm_makmmacro, scm_m_letrec); |
2f0d1375 | 929 | SCM_GLOBAL_SYMBOL(scm_sym_letrec, s_letrec); |
26d5b9b4 MD |
930 | |
931 | SCM | |
6e8d25a6 | 932 | scm_m_letrec (SCM xorig, SCM env) |
26d5b9b4 MD |
933 | { |
934 | SCM x = SCM_CDR (xorig); | |
302c12b4 | 935 | SCM_ASSYNT (SCM_CONSP (x), scm_s_bindings, s_letrec); |
26d5b9b4 | 936 | |
302c12b4 DH |
937 | if (SCM_NULLP (SCM_CAR (x))) |
938 | { | |
939 | /* null binding, let* faster */ | |
940 | SCM body = scm_m_body (SCM_IM_LETREC, SCM_CDR (x), s_letrec); | |
941 | return scm_m_letstar (scm_cons2 (SCM_CAR (xorig), SCM_EOL, body), env); | |
942 | } | |
26d5b9b4 | 943 | else |
302c12b4 DH |
944 | { |
945 | SCM rvars, inits, body; | |
946 | transform_bindings (SCM_CAR (x), &rvars, &inits, "letrec"); | |
947 | body = scm_m_body (SCM_IM_LETREC, SCM_CDR (x), "letrec"); | |
948 | return scm_cons2 (SCM_IM_LETREC, rvars, scm_cons (inits, body)); | |
949 | } | |
26d5b9b4 | 950 | } |
1cc91f1b | 951 | |
302c12b4 | 952 | |
b8229a3b | 953 | SCM_SYNTAX(s_let, "let", scm_makmmacro, scm_m_let); |
2f0d1375 | 954 | SCM_GLOBAL_SYMBOL(scm_sym_let, s_let); |
b8229a3b | 955 | |
302c12b4 | 956 | SCM |
6e8d25a6 | 957 | scm_m_let (SCM xorig, SCM env) |
0f2d19dd | 958 | { |
302c12b4 DH |
959 | SCM x = SCM_CDR (xorig); |
960 | SCM temp; | |
961 | ||
962 | SCM_ASSYNT (SCM_CONSP (x), scm_s_bindings, s_let); | |
963 | temp = SCM_CAR (x); | |
964 | if (SCM_NULLP (temp) | |
965 | || (scm_ilength (temp) == 1 && SCM_CONSP (SCM_CAR (temp)))) | |
26d5b9b4 MD |
966 | { |
967 | /* null or single binding, let* is faster */ | |
3096b33f | 968 | SCM bindings = temp; |
302c12b4 | 969 | SCM body = scm_m_body (SCM_IM_LET, SCM_CDR (x), s_let); |
3096b33f | 970 | return scm_m_letstar (scm_cons2 (SCM_CAR (xorig), bindings, body), env); |
26d5b9b4 | 971 | } |
302c12b4 | 972 | else if (SCM_CONSP (temp)) |
26d5b9b4 | 973 | { |
3096b33f DH |
974 | /* plain let */ |
975 | SCM bindings = temp; | |
302c12b4 | 976 | SCM rvars, inits, body; |
3096b33f | 977 | transform_bindings (bindings, &rvars, &inits, "let"); |
302c12b4 DH |
978 | body = scm_m_body (SCM_IM_LET, SCM_CDR (x), "let"); |
979 | return scm_cons2 (SCM_IM_LET, rvars, scm_cons (inits, body)); | |
26d5b9b4 | 980 | } |
302c12b4 DH |
981 | else |
982 | { | |
983 | /* named let: Transform (let name ((var init) ...) body ...) into | |
984 | * ((letrec ((name (lambda (var ...) body ...))) name) init ...) */ | |
26d5b9b4 | 985 | |
302c12b4 DH |
986 | SCM name = temp; |
987 | SCM vars = SCM_EOL; | |
988 | SCM *varloc = &vars; | |
989 | SCM inits = SCM_EOL; | |
990 | SCM *initloc = &inits; | |
991 | SCM bindings; | |
992 | ||
993 | SCM_ASSYNT (SCM_SYMBOLP (name), scm_s_bindings, s_let); | |
994 | x = SCM_CDR (x); | |
995 | SCM_ASSYNT (SCM_CONSP (x), scm_s_bindings, s_let); | |
996 | bindings = SCM_CAR (x); | |
997 | SCM_ASSYNT (scm_ilength (bindings) >= 0, scm_s_bindings, s_let); | |
998 | while (!SCM_NULLP (bindings)) | |
999 | { /* vars and inits both in order */ | |
1000 | SCM binding = SCM_CAR (bindings); | |
1001 | SCM_ASSYNT (scm_ilength (binding) == 2, scm_s_bindings, s_let); | |
1002 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (binding)), scm_s_variable, s_let); | |
1003 | *varloc = scm_list_1 (SCM_CAR (binding)); | |
1004 | varloc = SCM_CDRLOC (*varloc); | |
1005 | *initloc = scm_list_1 (SCM_CADR (binding)); | |
1006 | initloc = SCM_CDRLOC (*initloc); | |
1007 | bindings = SCM_CDR (bindings); | |
1008 | } | |
26d5b9b4 | 1009 | |
302c12b4 DH |
1010 | { |
1011 | SCM lambda_body = scm_m_body (SCM_IM_LET, SCM_CDR (x), "let"); | |
1012 | SCM lambda_form = scm_cons2 (scm_sym_lambda, vars, lambda_body); | |
1013 | SCM rvar = scm_list_1 (name); | |
1014 | SCM init = scm_list_1 (lambda_form); | |
1015 | SCM body = scm_m_body (SCM_IM_LET, scm_list_1 (name), "let"); | |
1016 | SCM letrec = scm_cons2 (SCM_IM_LETREC, rvar, scm_cons (init, body)); | |
1017 | return scm_cons (letrec, inits); | |
1018 | } | |
1019 | } | |
0f2d19dd JB |
1020 | } |
1021 | ||
1022 | ||
34d19ef6 | 1023 | SCM_SYNTAX (s_atapply, "@apply", scm_makmmacro, scm_m_apply); |
81123e6d MD |
1024 | SCM_GLOBAL_SYMBOL (scm_sym_atapply, s_atapply); |
1025 | SCM_GLOBAL_SYMBOL (scm_sym_apply, s_atapply + 1); | |
1cc91f1b | 1026 | |
0f2d19dd | 1027 | SCM |
e81d98ec | 1028 | scm_m_apply (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 1029 | { |
160bb34a | 1030 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 2, scm_s_expression, s_atapply); |
0f2d19dd JB |
1031 | return scm_cons (SCM_IM_APPLY, SCM_CDR (xorig)); |
1032 | } | |
1033 | ||
b8229a3b | 1034 | |
34d19ef6 HWN |
1035 | SCM_SYNTAX(s_atcall_cc, "@call-with-current-continuation", scm_makmmacro, scm_m_cont); |
1036 | SCM_GLOBAL_SYMBOL(scm_sym_atcall_cc, s_atcall_cc); | |
0f2d19dd | 1037 | |
1cc91f1b | 1038 | |
0f2d19dd | 1039 | SCM |
e81d98ec | 1040 | scm_m_cont (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 1041 | { |
6cb702da | 1042 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, |
160bb34a | 1043 | scm_s_expression, s_atcall_cc); |
3a3111a8 | 1044 | return scm_cons (SCM_IM_CONT, SCM_CDR (xorig)); |
0f2d19dd JB |
1045 | } |
1046 | ||
c96d76b8 | 1047 | #ifdef SCM_ENABLE_ELISP |
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 | ||
73b64342 MD |
1059 | SCM_SYNTAX (s_atfop, "@fop", scm_makmmacro, scm_m_atfop); |
1060 | ||
1061 | SCM | |
e81d98ec | 1062 | scm_m_atfop (SCM xorig, SCM env SCM_UNUSED) |
73b64342 | 1063 | { |
86d31dfe | 1064 | SCM x = SCM_CDR (xorig), var; |
160bb34a | 1065 | SCM_ASSYNT (scm_ilength (x) >= 1, scm_s_expression, "@fop"); |
86d31dfe | 1066 | var = scm_symbol_fref (SCM_CAR (x)); |
c96d76b8 NJ |
1067 | /* Passing the symbol name as the `subr' arg here isn't really |
1068 | right, but without it it can be very difficult to work out from | |
1069 | the error message which function definition was missing. In any | |
1070 | case, we shouldn't really use SCM_ASSYNT here at all, but instead | |
1071 | something equivalent to (signal void-function (list SYM)) in | |
1072 | Elisp. */ | |
86d31dfe | 1073 | SCM_ASSYNT (SCM_VARIABLEP (var), |
c96d76b8 NJ |
1074 | "Symbol's function definition is void", |
1075 | SCM_SYMBOL_CHARS (SCM_CAR (x))); | |
1076 | /* Support `defalias'. */ | |
1077 | while (SCM_SYMBOLP (SCM_VARIABLE_REF (var))) | |
1078 | { | |
1079 | var = scm_symbol_fref (SCM_VARIABLE_REF (var)); | |
1080 | SCM_ASSYNT (SCM_VARIABLEP (var), | |
1081 | "Symbol's function definition is void", | |
1082 | SCM_SYMBOL_CHARS (SCM_CAR (x))); | |
1083 | } | |
1084 | /* Use `var' here rather than `SCM_VARIABLE_REF (var)' because the | |
1085 | former allows for automatically picking up redefinitions of the | |
1086 | corresponding symbol. */ | |
904a077d | 1087 | SCM_SETCAR (x, var); |
c96d76b8 NJ |
1088 | /* If the variable contains a procedure, leave the |
1089 | `transformer-macro' in place so that the procedure's arguments | |
1090 | get properly transformed, and change the initial @fop to | |
1091 | SCM_IM_APPLY. */ | |
1092 | if (!SCM_MACROP (SCM_VARIABLE_REF (var))) | |
1093 | { | |
1094 | SCM_SETCAR (xorig, SCM_IM_APPLY); | |
1095 | return xorig; | |
1096 | } | |
1097 | /* Otherwise (the variable contains a macro), the arguments should | |
1098 | not be transformed, so cut the `transformer-macro' out and return | |
1099 | the resulting expression starting with the variable. */ | |
1100 | SCM_SETCDR (x, SCM_CDADR (x)); | |
73b64342 MD |
1101 | return x; |
1102 | } | |
1103 | ||
c96d76b8 NJ |
1104 | #endif /* SCM_ENABLE_ELISP */ |
1105 | ||
2e171178 MV |
1106 | /* (@bind ((var exp) ...) body ...) |
1107 | ||
1108 | This will assign the values of the `exp's to the global variables | |
1109 | named by `var's (symbols, not evaluated), creating them if they | |
1110 | don't exist, executes body, and then restores the previous values of | |
1111 | the `var's. Additionally, whenever control leaves body, the values | |
1112 | of the `var's are saved and restored when control returns. It is an | |
1113 | error when a symbol appears more than once among the `var's. | |
1114 | All `exp's are evaluated before any `var' is set. | |
1115 | ||
c96d76b8 | 1116 | Think of this as `let' for dynamic scope. |
2e171178 MV |
1117 | |
1118 | It is memoized into (#@bind ((var ...) . (reversed-val ...)) body ...). | |
1119 | ||
1120 | XXX - also implement `@bind*'. | |
1121 | */ | |
1122 | ||
73b64342 MD |
1123 | SCM_SYNTAX (s_atbind, "@bind", scm_makmmacro, scm_m_atbind); |
1124 | ||
1125 | SCM | |
1126 | scm_m_atbind (SCM xorig, SCM env) | |
1127 | { | |
1128 | SCM x = SCM_CDR (xorig); | |
2e171178 | 1129 | SCM top_level = scm_env_top_level (env); |
311f6782 | 1130 | SCM vars = SCM_EOL, var; |
2e171178 MV |
1131 | SCM exps = SCM_EOL; |
1132 | ||
1133 | SCM_ASSYNT (scm_ilength (x) > 1, scm_s_expression, s_atbind); | |
73b64342 | 1134 | |
73b64342 MD |
1135 | x = SCM_CAR (x); |
1136 | while (SCM_NIMP (x)) | |
1137 | { | |
2e171178 MV |
1138 | SCM rest; |
1139 | SCM sym_exp = SCM_CAR (x); | |
1140 | SCM_ASSYNT (scm_ilength (sym_exp) == 2, scm_s_bindings, s_atbind); | |
1141 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (sym_exp)), scm_s_bindings, s_atbind); | |
73b64342 | 1142 | x = SCM_CDR (x); |
2e171178 | 1143 | for (rest = x; SCM_NIMP (rest); rest = SCM_CDR (rest)) |
8ea46249 | 1144 | if (SCM_EQ_P (SCM_CAR (sym_exp), SCM_CAAR (rest))) |
2e171178 | 1145 | scm_misc_error (s_atbind, scm_s_duplicate_bindings, SCM_EOL); |
311f6782 MV |
1146 | /* The first call to scm_sym2var will look beyond the current |
1147 | module, while the second call wont. */ | |
1148 | var = scm_sym2var (SCM_CAR (sym_exp), top_level, SCM_BOOL_F); | |
1149 | if (SCM_FALSEP (var)) | |
1150 | var = scm_sym2var (SCM_CAR (sym_exp), top_level, SCM_BOOL_T); | |
1151 | vars = scm_cons (var, vars); | |
2e171178 | 1152 | exps = scm_cons (SCM_CADR (sym_exp), exps); |
73b64342 | 1153 | } |
2e171178 MV |
1154 | return scm_cons (SCM_IM_BIND, |
1155 | scm_cons (scm_cons (scm_reverse_x (vars, SCM_EOL), exps), | |
1156 | SCM_CDDR (xorig))); | |
73b64342 | 1157 | } |
73b64342 | 1158 | |
a513ead3 MV |
1159 | SCM_SYNTAX (s_at_call_with_values, "@call-with-values", scm_makmmacro, scm_m_at_call_with_values); |
1160 | SCM_GLOBAL_SYMBOL(scm_sym_at_call_with_values, s_at_call_with_values); | |
1161 | ||
1162 | SCM | |
e81d98ec | 1163 | scm_m_at_call_with_values (SCM xorig, SCM env SCM_UNUSED) |
a513ead3 MV |
1164 | { |
1165 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 2, | |
1166 | scm_s_expression, s_at_call_with_values); | |
1167 | return scm_cons (SCM_IM_CALL_WITH_VALUES, SCM_CDR (xorig)); | |
1168 | } | |
1169 | ||
26d5b9b4 MD |
1170 | SCM |
1171 | scm_m_expand_body (SCM xorig, SCM env) | |
1172 | { | |
22a52da1 | 1173 | SCM x = SCM_CDR (xorig), defs = SCM_EOL; |
26d5b9b4 MD |
1174 | char *what = SCM_ISYMCHARS (SCM_CAR (xorig)) + 2; |
1175 | ||
1176 | while (SCM_NIMP (x)) | |
1177 | { | |
22a52da1 DH |
1178 | SCM form = SCM_CAR (x); |
1179 | if (!SCM_CONSP (form)) | |
26d5b9b4 MD |
1180 | break; |
1181 | if (!SCM_SYMBOLP (SCM_CAR (form))) | |
1182 | break; | |
22a52da1 | 1183 | |
3a3111a8 MD |
1184 | form = scm_macroexp (scm_cons_source (form, |
1185 | SCM_CAR (form), | |
1186 | SCM_CDR (form)), | |
1187 | env); | |
26d5b9b4 | 1188 | |
cf498326 | 1189 | if (SCM_EQ_P (SCM_IM_DEFINE, SCM_CAR (form))) |
26d5b9b4 MD |
1190 | { |
1191 | defs = scm_cons (SCM_CDR (form), defs); | |
22a52da1 | 1192 | x = SCM_CDR (x); |
26d5b9b4 | 1193 | } |
22a52da1 | 1194 | else if (!SCM_IMP (defs)) |
26d5b9b4 MD |
1195 | { |
1196 | break; | |
1197 | } | |
cf498326 | 1198 | else if (SCM_EQ_P (SCM_IM_BEGIN, SCM_CAR (form))) |
26d5b9b4 | 1199 | { |
8ea46249 | 1200 | x = scm_append (scm_list_2 (SCM_CDR (form), SCM_CDR (x))); |
26d5b9b4 MD |
1201 | } |
1202 | else | |
1203 | { | |
22a52da1 | 1204 | x = scm_cons (form, SCM_CDR (x)); |
26d5b9b4 MD |
1205 | break; |
1206 | } | |
1207 | } | |
1208 | ||
302c12b4 | 1209 | if (!SCM_NULLP (defs)) |
26d5b9b4 | 1210 | { |
302c12b4 DH |
1211 | SCM rvars, inits, body, letrec; |
1212 | transform_bindings (defs, &rvars, &inits, what); | |
1213 | body = scm_m_body (SCM_IM_DEFINE, x, what); | |
1214 | letrec = scm_cons2 (SCM_IM_LETREC, rvars, scm_cons (inits, body)); | |
1215 | SCM_SETCAR (xorig, letrec); | |
1216 | SCM_SETCDR (xorig, SCM_EOL); | |
1217 | } | |
1218 | else | |
1219 | { | |
1220 | SCM_ASSYNT (SCM_CONSP (x), scm_s_body, what); | |
1221 | SCM_SETCAR (xorig, SCM_CAR (x)); | |
1222 | SCM_SETCDR (xorig, SCM_CDR (x)); | |
26d5b9b4 | 1223 | } |
26d5b9b4 MD |
1224 | |
1225 | return xorig; | |
1226 | } | |
1227 | ||
1228 | SCM | |
1229 | scm_macroexp (SCM x, SCM env) | |
1230 | { | |
86d31dfe | 1231 | SCM res, proc, orig_sym; |
26d5b9b4 MD |
1232 | |
1233 | /* Don't bother to produce error messages here. We get them when we | |
1234 | eventually execute the code for real. */ | |
1235 | ||
1236 | macro_tail: | |
86d31dfe MV |
1237 | orig_sym = SCM_CAR (x); |
1238 | if (!SCM_SYMBOLP (orig_sym)) | |
26d5b9b4 MD |
1239 | return x; |
1240 | ||
1241 | #ifdef USE_THREADS | |
1242 | { | |
1243 | SCM *proc_ptr = scm_lookupcar1 (x, env, 0); | |
1244 | if (proc_ptr == NULL) | |
1245 | { | |
1246 | /* We have lost the race. */ | |
1247 | goto macro_tail; | |
1248 | } | |
1249 | proc = *proc_ptr; | |
1250 | } | |
1251 | #else | |
1252 | proc = *scm_lookupcar (x, env, 0); | |
1253 | #endif | |
1254 | ||
1255 | /* Only handle memoizing macros. `Acros' and `macros' are really | |
1256 | special forms and should not be evaluated here. */ | |
1257 | ||
22a52da1 | 1258 | if (!SCM_MACROP (proc) || SCM_MACRO_TYPE (proc) != 2) |
26d5b9b4 MD |
1259 | return x; |
1260 | ||
86d31dfe | 1261 | SCM_SETCAR (x, orig_sym); /* Undo memoizing effect of lookupcar */ |
fdc28395 | 1262 | res = scm_call_2 (SCM_MACRO_CODE (proc), x, env); |
26d5b9b4 MD |
1263 | |
1264 | if (scm_ilength (res) <= 0) | |
8ea46249 | 1265 | res = scm_list_2 (SCM_IM_BEGIN, res); |
26d5b9b4 | 1266 | |
26d5b9b4 MD |
1267 | SCM_DEFER_INTS; |
1268 | SCM_SETCAR (x, SCM_CAR (res)); | |
1269 | SCM_SETCDR (x, SCM_CDR (res)); | |
1270 | SCM_ALLOW_INTS; | |
1271 | ||
1272 | goto macro_tail; | |
1273 | } | |
73b64342 | 1274 | |
6dbd0af5 MD |
1275 | /* scm_unmemocopy takes a memoized expression together with its |
1276 | * environment and rewrites it to its original form. Thus, it is the | |
1277 | * inversion of the rewrite rules above. The procedure is not | |
1278 | * optimized for speed. It's used in scm_iprin1 when printing the | |
220ff1eb MD |
1279 | * code of a closure, in scm_procedure_source, in display_frame when |
1280 | * generating the source for a stackframe in a backtrace, and in | |
1281 | * display_expression. | |
86d31dfe | 1282 | * |
c96d76b8 | 1283 | * Unmemoizing is not a reliable process. You cannot in general |
86d31dfe MV |
1284 | * expect to get the original source back. |
1285 | * | |
1286 | * However, GOOPS currently relies on this for method compilation. | |
1287 | * This ought to change. | |
26d5b9b4 MD |
1288 | */ |
1289 | ||
f1267706 | 1290 | #define SCM_BIT8(x) (127 & SCM_UNPACK (x)) |
c209c88e | 1291 | |
8ea46249 DH |
1292 | static SCM |
1293 | build_binding_list (SCM names, SCM inits) | |
1294 | { | |
1295 | SCM bindings = SCM_EOL; | |
1296 | while (!SCM_NULLP (names)) | |
1297 | { | |
1298 | SCM binding = scm_list_2 (SCM_CAR (names), SCM_CAR (inits)); | |
1299 | bindings = scm_cons (binding, bindings); | |
1300 | names = SCM_CDR (names); | |
1301 | inits = SCM_CDR (inits); | |
1302 | } | |
1303 | return bindings; | |
1304 | } | |
1305 | ||
6dbd0af5 | 1306 | static SCM |
1bbd0b84 | 1307 | unmemocopy (SCM x, SCM env) |
6dbd0af5 MD |
1308 | { |
1309 | SCM ls, z; | |
1310 | #ifdef DEBUG_EXTENSIONS | |
1311 | SCM p; | |
1312 | #endif | |
8c494e99 | 1313 | if (!SCM_CONSP (x)) |
6dbd0af5 MD |
1314 | return x; |
1315 | #ifdef DEBUG_EXTENSIONS | |
1316 | p = scm_whash_lookup (scm_source_whash, x); | |
1317 | #endif | |
8ea46249 | 1318 | switch (SCM_ITAG7 (SCM_CAR (x))) |
6dbd0af5 | 1319 | { |
c209c88e | 1320 | case SCM_BIT8(SCM_IM_AND): |
2f0d1375 | 1321 | ls = z = scm_cons (scm_sym_and, SCM_UNSPECIFIED); |
6dbd0af5 | 1322 | break; |
c209c88e | 1323 | case SCM_BIT8(SCM_IM_BEGIN): |
2f0d1375 | 1324 | ls = z = scm_cons (scm_sym_begin, SCM_UNSPECIFIED); |
6dbd0af5 | 1325 | break; |
c209c88e | 1326 | case SCM_BIT8(SCM_IM_CASE): |
2f0d1375 | 1327 | ls = z = scm_cons (scm_sym_case, SCM_UNSPECIFIED); |
6dbd0af5 | 1328 | break; |
c209c88e | 1329 | case SCM_BIT8(SCM_IM_COND): |
2f0d1375 | 1330 | ls = z = scm_cons (scm_sym_cond, SCM_UNSPECIFIED); |
6dbd0af5 | 1331 | break; |
8ea46249 | 1332 | case SCM_BIT8 (SCM_IM_DO): |
6dbd0af5 | 1333 | { |
8ea46249 DH |
1334 | /* format: (#@do (nk nk-1 ...) (i1 ... ik) (test) (body) s1 ... sk), |
1335 | * where nx is the name of a local variable, ix is an initializer for | |
1336 | * the local variable, test is the test clause of the do loop, body is | |
1337 | * the body of the do loop and sx are the step clauses for the local | |
1338 | * variables. */ | |
1339 | SCM names, inits, test, memoized_body, steps, bindings; | |
1340 | ||
1341 | x = SCM_CDR (x); | |
1342 | names = SCM_CAR (x); | |
6dbd0af5 | 1343 | x = SCM_CDR (x); |
8ea46249 DH |
1344 | inits = scm_reverse (unmemocopy (SCM_CAR (x), env)); |
1345 | env = EXTEND_ENV (names, SCM_EOL, env); | |
6dbd0af5 | 1346 | x = SCM_CDR (x); |
8ea46249 DH |
1347 | test = unmemocopy (SCM_CAR (x), env); |
1348 | x = SCM_CDR (x); | |
1349 | memoized_body = SCM_CAR (x); | |
1350 | x = SCM_CDR (x); | |
1351 | steps = scm_reverse (unmemocopy (x, env)); | |
1352 | ||
26d5b9b4 | 1353 | /* build transformed binding list */ |
8ea46249 DH |
1354 | bindings = SCM_EOL; |
1355 | while (!SCM_NULLP (names)) | |
6dbd0af5 | 1356 | { |
8ea46249 DH |
1357 | SCM name = SCM_CAR (names); |
1358 | SCM init = SCM_CAR (inits); | |
1359 | SCM step = SCM_CAR (steps); | |
1360 | step = SCM_EQ_P (step, name) ? SCM_EOL : scm_list_1 (step); | |
1361 | ||
1362 | bindings = scm_cons (scm_cons2 (name, init, step), bindings); | |
1363 | ||
1364 | names = SCM_CDR (names); | |
1365 | inits = SCM_CDR (inits); | |
1366 | steps = SCM_CDR (steps); | |
6dbd0af5 | 1367 | } |
8ea46249 DH |
1368 | z = scm_cons (test, SCM_UNSPECIFIED); |
1369 | ls = scm_cons2 (scm_sym_do, bindings, z); | |
1370 | ||
1371 | x = scm_cons (SCM_BOOL_F, memoized_body); | |
1372 | break; | |
1373 | } | |
1374 | case SCM_BIT8(SCM_IM_IF): | |
1375 | ls = z = scm_cons (scm_sym_if, SCM_UNSPECIFIED); | |
1376 | break; | |
1377 | case SCM_BIT8 (SCM_IM_LET): | |
1378 | { | |
1379 | /* format: (#@let (nk nk-1 ...) (i1 ... ik) b1 ...), | |
1380 | * where nx is the name of a local variable, ix is an initializer for | |
1381 | * the local variable and by are the body clauses. */ | |
1382 | SCM names, inits, bindings; | |
1383 | ||
1384 | x = SCM_CDR (x); | |
1385 | names = SCM_CAR (x); | |
1386 | x = SCM_CDR (x); | |
1387 | inits = scm_reverse (unmemocopy (SCM_CAR (x), env)); | |
1388 | env = EXTEND_ENV (names, SCM_EOL, env); | |
1389 | ||
1390 | bindings = build_binding_list (names, inits); | |
1391 | z = scm_cons (bindings, SCM_UNSPECIFIED); | |
1392 | ls = scm_cons (scm_sym_let, z); | |
1393 | break; | |
1394 | } | |
1395 | case SCM_BIT8 (SCM_IM_LETREC): | |
1396 | { | |
1397 | /* format: (#@letrec (nk nk-1 ...) (i1 ... ik) b1 ...), | |
1398 | * where nx is the name of a local variable, ix is an initializer for | |
1399 | * the local variable and by are the body clauses. */ | |
1400 | SCM names, inits, bindings; | |
1401 | ||
1402 | x = SCM_CDR (x); | |
1403 | names = SCM_CAR (x); | |
1404 | env = EXTEND_ENV (names, SCM_EOL, env); | |
1405 | x = SCM_CDR (x); | |
1406 | inits = scm_reverse (unmemocopy (SCM_CAR (x), env)); | |
1407 | ||
1408 | bindings = build_binding_list (names, inits); | |
1409 | z = scm_cons (bindings, SCM_UNSPECIFIED); | |
1410 | ls = scm_cons (scm_sym_letrec, z); | |
6dbd0af5 MD |
1411 | break; |
1412 | } | |
c209c88e | 1413 | case SCM_BIT8(SCM_IM_LETSTAR): |
6dbd0af5 MD |
1414 | { |
1415 | SCM b, y; | |
1416 | x = SCM_CDR (x); | |
1417 | b = SCM_CAR (x); | |
1418 | y = SCM_EOL; | |
1419 | if SCM_IMP (b) | |
1420 | { | |
e2806c10 | 1421 | env = EXTEND_ENV (SCM_EOL, SCM_EOL, env); |
6dbd0af5 MD |
1422 | goto letstar; |
1423 | } | |
1424 | y = z = scm_acons (SCM_CAR (b), | |
1425 | unmemocar ( | |
8ea46249 | 1426 | scm_cons (unmemocopy (SCM_CADR (b), env), SCM_EOL), env), |
6dbd0af5 | 1427 | SCM_UNSPECIFIED); |
e2806c10 | 1428 | env = EXTEND_ENV (SCM_CAR (b), SCM_BOOL_F, env); |
8ea46249 | 1429 | b = SCM_CDDR (b); |
6dbd0af5 MD |
1430 | if (SCM_IMP (b)) |
1431 | { | |
1432 | SCM_SETCDR (y, SCM_EOL); | |
2f0d1375 | 1433 | ls = scm_cons (scm_sym_let, z = scm_cons (y, SCM_UNSPECIFIED)); |
6dbd0af5 MD |
1434 | break; |
1435 | } | |
1436 | do | |
1437 | { | |
a23afe53 MD |
1438 | SCM_SETCDR (z, scm_acons (SCM_CAR (b), |
1439 | unmemocar ( | |
8ea46249 | 1440 | scm_list_1 (unmemocopy (SCM_CADR (b), env)), env), |
a23afe53 MD |
1441 | SCM_UNSPECIFIED)); |
1442 | z = SCM_CDR (z); | |
e2806c10 | 1443 | env = EXTEND_ENV (SCM_CAR (b), SCM_BOOL_F, env); |
8ea46249 | 1444 | b = SCM_CDDR (b); |
6dbd0af5 | 1445 | } |
ff467021 | 1446 | while (SCM_NIMP (b)); |
a23afe53 | 1447 | SCM_SETCDR (z, SCM_EOL); |
6dbd0af5 | 1448 | letstar: |
2f0d1375 | 1449 | ls = scm_cons (scm_sym_letstar, z = scm_cons (y, SCM_UNSPECIFIED)); |
6dbd0af5 MD |
1450 | break; |
1451 | } | |
c209c88e | 1452 | case SCM_BIT8(SCM_IM_OR): |
2f0d1375 | 1453 | ls = z = scm_cons (scm_sym_or, SCM_UNSPECIFIED); |
6dbd0af5 | 1454 | break; |
c209c88e | 1455 | case SCM_BIT8(SCM_IM_LAMBDA): |
6dbd0af5 | 1456 | x = SCM_CDR (x); |
8ea46249 DH |
1457 | z = scm_cons (SCM_CAR (x), SCM_UNSPECIFIED); |
1458 | ls = scm_cons (scm_sym_lambda, z); | |
e2806c10 | 1459 | env = EXTEND_ENV (SCM_CAR (x), SCM_EOL, env); |
6dbd0af5 | 1460 | break; |
c209c88e | 1461 | case SCM_BIT8(SCM_IM_QUOTE): |
2f0d1375 | 1462 | ls = z = scm_cons (scm_sym_quote, SCM_UNSPECIFIED); |
6dbd0af5 | 1463 | break; |
c209c88e | 1464 | case SCM_BIT8(SCM_IM_SET_X): |
89efbff4 | 1465 | ls = z = scm_cons (scm_sym_set_x, SCM_UNSPECIFIED); |
6dbd0af5 | 1466 | break; |
c209c88e | 1467 | case SCM_BIT8(SCM_IM_DEFINE): |
6dbd0af5 MD |
1468 | { |
1469 | SCM n; | |
1470 | x = SCM_CDR (x); | |
8ea46249 DH |
1471 | n = SCM_CAR (x); |
1472 | z = scm_cons (n, SCM_UNSPECIFIED); | |
1473 | ls = scm_cons (scm_sym_define, z); | |
01f11e02 | 1474 | if (!SCM_NULLP (env)) |
4c5f8e8f NJ |
1475 | env = scm_cons (scm_cons (scm_cons (n, SCM_CAAR (env)), |
1476 | SCM_CDAR (env)), | |
1477 | SCM_CDR (env)); | |
6dbd0af5 MD |
1478 | break; |
1479 | } | |
c209c88e | 1480 | case SCM_BIT8(SCM_MAKISYM (0)): |
6dbd0af5 MD |
1481 | z = SCM_CAR (x); |
1482 | if (!SCM_ISYMP (z)) | |
1483 | goto unmemo; | |
ff467021 | 1484 | switch (SCM_ISYMNUM (z)) |
6dbd0af5 MD |
1485 | { |
1486 | case (SCM_ISYMNUM (SCM_IM_APPLY)): | |
2f0d1375 | 1487 | ls = z = scm_cons (scm_sym_atapply, SCM_UNSPECIFIED); |
6dbd0af5 MD |
1488 | goto loop; |
1489 | case (SCM_ISYMNUM (SCM_IM_CONT)): | |
2f0d1375 | 1490 | ls = z = scm_cons (scm_sym_atcall_cc, SCM_UNSPECIFIED); |
6dbd0af5 | 1491 | goto loop; |
a570e93a MD |
1492 | case (SCM_ISYMNUM (SCM_IM_DELAY)): |
1493 | ls = z = scm_cons (scm_sym_delay, SCM_UNSPECIFIED); | |
1494 | x = SCM_CDR (x); | |
1495 | goto loop; | |
a513ead3 MV |
1496 | case (SCM_ISYMNUM (SCM_IM_CALL_WITH_VALUES)): |
1497 | ls = z = scm_cons (scm_sym_at_call_with_values, SCM_UNSPECIFIED); | |
1498 | goto loop; | |
6dbd0af5 | 1499 | default: |
fa888178 | 1500 | /* appease the Sun compiler god: */ ; |
6dbd0af5 MD |
1501 | } |
1502 | unmemo: | |
1503 | default: | |
1504 | ls = z = unmemocar (scm_cons (unmemocopy (SCM_CAR (x), env), | |
1505 | SCM_UNSPECIFIED), | |
1506 | env); | |
1507 | } | |
1508 | loop: | |
8c494e99 DH |
1509 | x = SCM_CDR (x); |
1510 | while (SCM_CONSP (x)) | |
a23afe53 | 1511 | { |
8c494e99 DH |
1512 | SCM form = SCM_CAR (x); |
1513 | if (!SCM_ISYMP (form)) | |
1514 | { | |
1515 | SCM copy = scm_cons (unmemocopy (form, env), SCM_UNSPECIFIED); | |
1516 | SCM_SETCDR (z, unmemocar (copy, env)); | |
1517 | z = SCM_CDR (z); | |
1518 | } | |
1519 | x = SCM_CDR (x); | |
a23afe53 MD |
1520 | } |
1521 | SCM_SETCDR (z, x); | |
6dbd0af5 | 1522 | #ifdef DEBUG_EXTENSIONS |
01f11e02 | 1523 | if (!SCM_FALSEP (p)) |
6dbd0af5 MD |
1524 | scm_whash_insert (scm_source_whash, ls, p); |
1525 | #endif | |
1526 | return ls; | |
1527 | } | |
1528 | ||
1cc91f1b | 1529 | |
6dbd0af5 | 1530 | SCM |
6e8d25a6 | 1531 | scm_unmemocopy (SCM x, SCM env) |
6dbd0af5 | 1532 | { |
01f11e02 | 1533 | if (!SCM_NULLP (env)) |
6dbd0af5 MD |
1534 | /* Make a copy of the lowest frame to protect it from |
1535 | modifications by SCM_IM_DEFINE */ | |
1536 | return unmemocopy (x, scm_cons (SCM_CAR (env), SCM_CDR (env))); | |
1537 | else | |
1538 | return unmemocopy (x, env); | |
1539 | } | |
1540 | ||
1cc91f1b | 1541 | |
0f2d19dd | 1542 | int |
6e8d25a6 | 1543 | scm_badargsp (SCM formals, SCM args) |
0f2d19dd | 1544 | { |
6a0f6ff3 | 1545 | while (!SCM_NULLP (formals)) |
0f2d19dd | 1546 | { |
01f11e02 | 1547 | if (!SCM_CONSP (formals)) |
ff467021 | 1548 | return 0; |
6a0f6ff3 | 1549 | if (SCM_NULLP (args)) |
ff467021 | 1550 | return 1; |
0f2d19dd JB |
1551 | formals = SCM_CDR (formals); |
1552 | args = SCM_CDR (args); | |
1553 | } | |
01f11e02 | 1554 | return !SCM_NULLP (args) ? 1 : 0; |
0f2d19dd | 1555 | } |
a392ee15 | 1556 | |
0f2d19dd | 1557 | |
002f1a5d MD |
1558 | static int |
1559 | scm_badformalsp (SCM closure, int n) | |
1560 | { | |
726d810a DH |
1561 | SCM formals = SCM_CLOSURE_FORMALS (closure); |
1562 | while (!SCM_NULLP (formals)) | |
002f1a5d | 1563 | { |
726d810a | 1564 | if (!SCM_CONSP (formals)) |
002f1a5d MD |
1565 | return 0; |
1566 | if (n == 0) | |
1567 | return 1; | |
1568 | --n; | |
1569 | formals = SCM_CDR (formals); | |
1570 | } | |
1571 | return n; | |
1572 | } | |
0f2d19dd JB |
1573 | |
1574 | \f | |
6dbd0af5 | 1575 | SCM |
6e8d25a6 | 1576 | scm_eval_args (SCM l, SCM env, SCM proc) |
6dbd0af5 | 1577 | { |
680ed4a8 | 1578 | SCM results = SCM_EOL, *lloc = &results, res; |
904a077d | 1579 | while (SCM_CONSP (l)) |
6dbd0af5 | 1580 | { |
680ed4a8 | 1581 | res = EVALCAR (l, env); |
904a077d | 1582 | |
8ea46249 | 1583 | *lloc = scm_list_1 (res); |
a23afe53 | 1584 | lloc = SCM_CDRLOC (*lloc); |
6dbd0af5 MD |
1585 | l = SCM_CDR (l); |
1586 | } | |
22a52da1 | 1587 | if (!SCM_NULLP (l)) |
904a077d | 1588 | scm_wrong_num_args (proc); |
680ed4a8 | 1589 | return results; |
6dbd0af5 | 1590 | } |
c4ac4d88 | 1591 | |
9de33deb MD |
1592 | SCM |
1593 | scm_eval_body (SCM code, SCM env) | |
1594 | { | |
1595 | SCM next; | |
1596 | again: | |
01f11e02 DH |
1597 | next = SCM_CDR (code); |
1598 | while (!SCM_NULLP (next)) | |
9de33deb MD |
1599 | { |
1600 | if (SCM_IMP (SCM_CAR (code))) | |
1601 | { | |
1602 | if (SCM_ISYMP (SCM_CAR (code))) | |
1603 | { | |
1604 | code = scm_m_expand_body (code, env); | |
1605 | goto again; | |
1606 | } | |
1607 | } | |
1608 | else | |
1609 | SCM_XEVAL (SCM_CAR (code), env); | |
1610 | code = next; | |
01f11e02 | 1611 | next = SCM_CDR (code); |
9de33deb MD |
1612 | } |
1613 | return SCM_XEVALCAR (code, env); | |
1614 | } | |
1615 | ||
c4ac4d88 | 1616 | |
0f2d19dd JB |
1617 | #endif /* !DEVAL */ |
1618 | ||
6dbd0af5 MD |
1619 | |
1620 | /* SECTION: This code is specific for the debugging support. One | |
1621 | * branch is read when DEVAL isn't defined, the other when DEVAL is | |
1622 | * defined. | |
1623 | */ | |
1624 | ||
1625 | #ifndef DEVAL | |
1626 | ||
1627 | #define SCM_APPLY scm_apply | |
1628 | #define PREP_APPLY(proc, args) | |
1629 | #define ENTER_APPLY | |
ddea3325 | 1630 | #define RETURN(x) do { return x; } while (0) |
b7ff98dd MD |
1631 | #ifdef STACK_CHECKING |
1632 | #ifndef NO_CEVAL_STACK_CHECKING | |
1633 | #define EVAL_STACK_CHECKING | |
1634 | #endif | |
6dbd0af5 MD |
1635 | #endif |
1636 | ||
1637 | #else /* !DEVAL */ | |
1638 | ||
0f2d19dd JB |
1639 | #undef SCM_CEVAL |
1640 | #define SCM_CEVAL scm_deval /* Substitute all uses of scm_ceval */ | |
1641 | #undef SCM_APPLY | |
1642 | #define SCM_APPLY scm_dapply | |
6dbd0af5 MD |
1643 | #undef PREP_APPLY |
1644 | #define PREP_APPLY(p, l) \ | |
1645 | { ++debug.info; debug.info->a.proc = p; debug.info->a.args = l; } | |
1646 | #undef ENTER_APPLY | |
1647 | #define ENTER_APPLY \ | |
d3a6bc94 | 1648 | do { \ |
b7ff98dd | 1649 | SCM_SET_ARGSREADY (debug);\ |
5132eef0 | 1650 | if (scm_check_apply_p && SCM_TRAPS_P)\ |
b7ff98dd | 1651 | if (SCM_APPLY_FRAME_P || (SCM_TRACE_P && PROCTRACEP (proc)))\ |
6dbd0af5 | 1652 | {\ |
156dcb09 | 1653 | SCM tmp, tail = SCM_BOOL(SCM_TRACED_FRAME_P (debug)); \ |
c6a4fbce | 1654 | SCM_SET_TRACED_FRAME (debug); \ |
d95c0b76 | 1655 | SCM_TRAPS_P = 0;\ |
b7ff98dd | 1656 | if (SCM_CHEAPTRAPS_P)\ |
6dbd0af5 | 1657 | {\ |
c0ab1b8d | 1658 | tmp = scm_make_debugobj (&debug);\ |
d95c0b76 | 1659 | scm_call_3 (SCM_APPLY_FRAME_HDLR, scm_sym_apply_frame, tmp, tail);\ |
b6d75948 | 1660 | }\ |
6dbd0af5 MD |
1661 | else\ |
1662 | {\ | |
5f144b10 GH |
1663 | int first;\ |
1664 | tmp = scm_make_continuation (&first);\ | |
1665 | if (first)\ | |
d95c0b76 | 1666 | scm_call_3 (SCM_APPLY_FRAME_HDLR, scm_sym_apply_frame, tmp, tail);\ |
6dbd0af5 | 1667 | }\ |
d95c0b76 | 1668 | SCM_TRAPS_P = 1;\ |
6dbd0af5 | 1669 | }\ |
d3a6bc94 | 1670 | } while (0) |
0f2d19dd | 1671 | #undef RETURN |
ddea3325 | 1672 | #define RETURN(e) do { proc = (e); goto exit; } while (0) |
b7ff98dd MD |
1673 | #ifdef STACK_CHECKING |
1674 | #ifndef EVAL_STACK_CHECKING | |
1675 | #define EVAL_STACK_CHECKING | |
1676 | #endif | |
6dbd0af5 MD |
1677 | #endif |
1678 | ||
1679 | /* scm_ceval_ptr points to the currently selected evaluator. | |
1680 | * *fixme*: Although efficiency is important here, this state variable | |
1681 | * should probably not be a global. It should be related to the | |
1682 | * current repl. | |
1683 | */ | |
1684 | ||
1cc91f1b | 1685 | |
1bbd0b84 | 1686 | SCM (*scm_ceval_ptr) (SCM x, SCM env); |
0f2d19dd | 1687 | |
1646d37b | 1688 | /* scm_last_debug_frame contains a pointer to the last debugging |
6dbd0af5 MD |
1689 | * information stack frame. It is accessed very often from the |
1690 | * debugging evaluator, so it should probably not be indirectly | |
1691 | * addressed. Better to save and restore it from the current root at | |
1692 | * any stack swaps. | |
1693 | */ | |
1694 | ||
1646d37b | 1695 | #ifndef USE_THREADS |
92c2555f | 1696 | scm_t_debug_frame *scm_last_debug_frame; |
1646d37b | 1697 | #endif |
6dbd0af5 MD |
1698 | |
1699 | /* scm_debug_eframe_size is the number of slots available for pseudo | |
1700 | * stack frames at each real stack frame. | |
1701 | */ | |
1702 | ||
c014a02e | 1703 | long scm_debug_eframe_size; |
6dbd0af5 | 1704 | |
b7ff98dd | 1705 | int scm_debug_mode, scm_check_entry_p, scm_check_apply_p, scm_check_exit_p; |
6dbd0af5 | 1706 | |
c014a02e | 1707 | long scm_eval_stack; |
a74145b8 | 1708 | |
92c2555f | 1709 | scm_t_option scm_eval_opts[] = { |
a74145b8 | 1710 | { SCM_OPTION_INTEGER, "stack", 22000, "Size of thread stacks (in machine words)." } |
33b97402 MD |
1711 | }; |
1712 | ||
92c2555f | 1713 | scm_t_option scm_debug_opts[] = { |
b7ff98dd MD |
1714 | { SCM_OPTION_BOOLEAN, "cheap", 1, |
1715 | "*Flyweight representation of the stack at traps." }, | |
1716 | { SCM_OPTION_BOOLEAN, "breakpoints", 0, "*Check for breakpoints." }, | |
1717 | { SCM_OPTION_BOOLEAN, "trace", 0, "*Trace mode." }, | |
1718 | { SCM_OPTION_BOOLEAN, "procnames", 1, | |
1719 | "Record procedure names at definition." }, | |
1720 | { SCM_OPTION_BOOLEAN, "backwards", 0, | |
1721 | "Display backtrace in anti-chronological order." }, | |
274dc5fd | 1722 | { SCM_OPTION_INTEGER, "width", 79, "Maximal width of backtrace." }, |
4e646a03 MD |
1723 | { SCM_OPTION_INTEGER, "indent", 10, "Maximal indentation in backtrace." }, |
1724 | { SCM_OPTION_INTEGER, "frames", 3, | |
b7ff98dd | 1725 | "Maximum number of tail-recursive frames in backtrace." }, |
4e646a03 MD |
1726 | { SCM_OPTION_INTEGER, "maxdepth", 1000, |
1727 | "Maximal number of stored backtrace frames." }, | |
1728 | { SCM_OPTION_INTEGER, "depth", 20, "Maximal length of printed backtrace." }, | |
11f77bfc MD |
1729 | { SCM_OPTION_BOOLEAN, "backtrace", 0, "Show backtrace on error." }, |
1730 | { SCM_OPTION_BOOLEAN, "debug", 0, "Use the debugging evaluator." }, | |
863e833b | 1731 | { SCM_OPTION_INTEGER, "stack", 20000, "Stack size limit (measured in words; 0 = no check)." }, |
d95c0b76 | 1732 | { 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 |
1733 | }; |
1734 | ||
92c2555f | 1735 | scm_t_option scm_evaluator_trap_table[] = { |
b6d75948 | 1736 | { SCM_OPTION_BOOLEAN, "traps", 0, "Enable evaluator traps." }, |
b7ff98dd MD |
1737 | { SCM_OPTION_BOOLEAN, "enter-frame", 0, "Trap when eval enters new frame." }, |
1738 | { SCM_OPTION_BOOLEAN, "apply-frame", 0, "Trap when entering apply." }, | |
d95c0b76 NJ |
1739 | { SCM_OPTION_BOOLEAN, "exit-frame", 0, "Trap when exiting eval or apply." }, |
1740 | { SCM_OPTION_SCM, "enter-frame-handler", (unsigned long)SCM_BOOL_F, "Handler for enter-frame traps." }, | |
1741 | { SCM_OPTION_SCM, "apply-frame-handler", (unsigned long)SCM_BOOL_F, "Handler for apply-frame traps." }, | |
1742 | { SCM_OPTION_SCM, "exit-frame-handler", (unsigned long)SCM_BOOL_F, "Handler for exit-frame traps." } | |
6dbd0af5 MD |
1743 | }; |
1744 | ||
a1ec6916 | 1745 | SCM_DEFINE (scm_eval_options_interface, "eval-options-interface", 0, 1, 0, |
1bbd0b84 | 1746 | (SCM setting), |
b3f26b14 MG |
1747 | "Option interface for the evaluation options. Instead of using\n" |
1748 | "this procedure directly, use the procedures @code{eval-enable},\n" | |
3939e9df | 1749 | "@code{eval-disable}, @code{eval-set!} and @code{eval-options}.") |
1bbd0b84 | 1750 | #define FUNC_NAME s_scm_eval_options_interface |
33b97402 MD |
1751 | { |
1752 | SCM ans; | |
1753 | SCM_DEFER_INTS; | |
1754 | ans = scm_options (setting, | |
1755 | scm_eval_opts, | |
1756 | SCM_N_EVAL_OPTIONS, | |
1bbd0b84 | 1757 | FUNC_NAME); |
a74145b8 | 1758 | scm_eval_stack = SCM_EVAL_STACK * sizeof (void *); |
33b97402 MD |
1759 | SCM_ALLOW_INTS; |
1760 | return ans; | |
1761 | } | |
1bbd0b84 | 1762 | #undef FUNC_NAME |
33b97402 | 1763 | |
a1ec6916 | 1764 | SCM_DEFINE (scm_evaluator_traps, "evaluator-traps-interface", 0, 1, 0, |
1bbd0b84 | 1765 | (SCM setting), |
b3f26b14 | 1766 | "Option interface for the evaluator trap options.") |
1bbd0b84 | 1767 | #define FUNC_NAME s_scm_evaluator_traps |
33b97402 MD |
1768 | { |
1769 | SCM ans; | |
1770 | SCM_DEFER_INTS; | |
1771 | ans = scm_options (setting, | |
1772 | scm_evaluator_trap_table, | |
1773 | SCM_N_EVALUATOR_TRAPS, | |
1bbd0b84 | 1774 | FUNC_NAME); |
33b97402 | 1775 | SCM_RESET_DEBUG_MODE; |
bfc69694 | 1776 | SCM_ALLOW_INTS; |
33b97402 MD |
1777 | return ans; |
1778 | } | |
1bbd0b84 | 1779 | #undef FUNC_NAME |
33b97402 | 1780 | |
24933780 | 1781 | static SCM |
a392ee15 | 1782 | deval_args (SCM l, SCM env, SCM proc, SCM *lloc) |
0f2d19dd | 1783 | { |
680ed4a8 | 1784 | SCM *results = lloc, res; |
904a077d | 1785 | while (SCM_CONSP (l)) |
0f2d19dd | 1786 | { |
680ed4a8 | 1787 | res = EVALCAR (l, env); |
904a077d | 1788 | |
8ea46249 | 1789 | *lloc = scm_list_1 (res); |
a23afe53 | 1790 | lloc = SCM_CDRLOC (*lloc); |
0f2d19dd JB |
1791 | l = SCM_CDR (l); |
1792 | } | |
22a52da1 | 1793 | if (!SCM_NULLP (l)) |
904a077d | 1794 | scm_wrong_num_args (proc); |
680ed4a8 | 1795 | return *results; |
0f2d19dd JB |
1796 | } |
1797 | ||
6dbd0af5 MD |
1798 | #endif /* !DEVAL */ |
1799 | ||
1800 | ||
a392ee15 | 1801 | /* SECTION: This code is compiled twice. |
6dbd0af5 MD |
1802 | */ |
1803 | ||
a392ee15 | 1804 | |
d9d39d76 | 1805 | /* Update the toplevel environment frame ENV so that it refers to the |
a392ee15 | 1806 | * current module. */ |
d9d39d76 MV |
1807 | #define UPDATE_TOPLEVEL_ENV(env) \ |
1808 | do { \ | |
1809 | SCM p = scm_current_module_lookup_closure (); \ | |
1810 | if (p != SCM_CAR(env)) \ | |
1811 | env = scm_top_level_env (p); \ | |
1812 | } while (0) | |
1813 | ||
6dbd0af5 | 1814 | |
a392ee15 DH |
1815 | /* This is the evaluator. Like any real monster, it has three heads: |
1816 | * | |
1817 | * scm_ceval is the non-debugging evaluator, scm_deval is the debugging | |
1818 | * version. Both are implemented using a common code base, using the | |
1819 | * following mechanism: SCM_CEVAL is a macro, which is either defined to | |
1820 | * scm_ceval or scm_deval. Thus, there is no function SCM_CEVAL, but the code | |
1821 | * for SCM_CEVAL actually compiles to either scm_ceval or scm_deval. When | |
1822 | * SCM_CEVAL is defined to scm_ceval, it is known that the macro DEVAL is not | |
1823 | * defined. When SCM_CEVAL is defined to scm_deval, then the macro DEVAL is | |
1824 | * known to be defined. Thus, in SCM_CEVAL parts for the debugging evaluator | |
1825 | * are enclosed within #ifdef DEVAL ... #endif. | |
1826 | * | |
1827 | * All three (scm_ceval, scm_deval and their common implementation SCM_CEVAL) | |
1828 | * take two input parameters, x and env: x is a single expression to be | |
1829 | * evalutated. env is the environment in which bindings are searched. | |
1830 | * | |
1831 | * x is known to be a cell (i. e. a pair or any other non-immediate). Since x | |
1832 | * is a single expression, it is necessarily in a tail position. If x is just | |
1833 | * a call to another function like in the expression (foo exp1 exp2 ...), the | |
1834 | * realization of that call therefore _must_not_ increase stack usage (the | |
1835 | * evaluation of exp1, exp2 etc., however, may do so). This is realized by | |
1836 | * making extensive use of 'goto' statements within the evaluator: The gotos | |
1837 | * replace recursive calls to SCM_CEVAL, thus re-using the same stack frame | |
1838 | * that SCM_CEVAL was already using. If, however, x represents some form that | |
1839 | * requires to evaluate a sequence of expressions like (begin exp1 exp2 ...), | |
1840 | * then recursive calls to SCM_CEVAL are performed for all but the last | |
1841 | * expression of that sequence. */ | |
6dbd0af5 | 1842 | |
0f2d19dd | 1843 | #if 0 |
0f2d19dd | 1844 | SCM |
1bbd0b84 | 1845 | scm_ceval (SCM x, SCM env) |
0f2d19dd JB |
1846 | {} |
1847 | #endif | |
1cc91f1b | 1848 | |
a392ee15 | 1849 | #if 0 |
0f2d19dd | 1850 | SCM |
1bbd0b84 | 1851 | scm_deval (SCM x, SCM env) |
0f2d19dd JB |
1852 | {} |
1853 | #endif | |
1854 | ||
6dbd0af5 | 1855 | SCM |
1bbd0b84 | 1856 | SCM_CEVAL (SCM x, SCM env) |
0f2d19dd | 1857 | { |
42030fb2 | 1858 | SCM proc, arg1; |
6dbd0af5 | 1859 | #ifdef DEVAL |
92c2555f MV |
1860 | scm_t_debug_frame debug; |
1861 | scm_t_debug_info *debug_info_end; | |
1646d37b | 1862 | debug.prev = scm_last_debug_frame; |
020c890c | 1863 | debug.status = 0; |
04b6c081 | 1864 | /* |
92c2555f | 1865 | * The debug.vect contains twice as much scm_t_debug_info frames as the |
04b6c081 MD |
1866 | * user has specified with (debug-set! frames <n>). |
1867 | * | |
1868 | * Even frames are eval frames, odd frames are apply frames. | |
1869 | */ | |
92c2555f | 1870 | debug.vect = (scm_t_debug_info *) alloca (scm_debug_eframe_size |
a392ee15 | 1871 | * sizeof (scm_t_debug_info)); |
c0ab1b8d JB |
1872 | debug.info = debug.vect; |
1873 | debug_info_end = debug.vect + scm_debug_eframe_size; | |
1874 | scm_last_debug_frame = &debug; | |
6dbd0af5 | 1875 | #endif |
b7ff98dd | 1876 | #ifdef EVAL_STACK_CHECKING |
6f13f9cb MD |
1877 | if (scm_stack_checking_enabled_p |
1878 | && SCM_STACK_OVERFLOW_P ((SCM_STACKITEM *) &proc)) | |
6dbd0af5 | 1879 | { |
b7ff98dd | 1880 | #ifdef DEVAL |
6dbd0af5 MD |
1881 | debug.info->e.exp = x; |
1882 | debug.info->e.env = env; | |
b7ff98dd | 1883 | #endif |
6dbd0af5 MD |
1884 | scm_report_stack_overflow (); |
1885 | } | |
1886 | #endif | |
6a0f6ff3 | 1887 | |
6dbd0af5 MD |
1888 | #ifdef DEVAL |
1889 | goto start; | |
1890 | #endif | |
6a0f6ff3 | 1891 | |
6dbd0af5 MD |
1892 | loop: |
1893 | #ifdef DEVAL | |
b7ff98dd MD |
1894 | SCM_CLEAR_ARGSREADY (debug); |
1895 | if (SCM_OVERFLOWP (debug)) | |
6dbd0af5 | 1896 | --debug.info; |
04b6c081 MD |
1897 | /* |
1898 | * In theory, this should be the only place where it is necessary to | |
1899 | * check for space in debug.vect since both eval frames and | |
1900 | * available space are even. | |
1901 | * | |
1902 | * For this to be the case, however, it is necessary that primitive | |
1903 | * special forms which jump back to `loop', `begin' or some similar | |
680516ba | 1904 | * label call PREP_APPLY. |
04b6c081 | 1905 | */ |
c0ab1b8d | 1906 | else if (++debug.info >= debug_info_end) |
6dbd0af5 | 1907 | { |
b7ff98dd | 1908 | SCM_SET_OVERFLOW (debug); |
6dbd0af5 MD |
1909 | debug.info -= 2; |
1910 | } | |
6a0f6ff3 | 1911 | |
6dbd0af5 MD |
1912 | start: |
1913 | debug.info->e.exp = x; | |
1914 | debug.info->e.env = env; | |
5132eef0 DH |
1915 | if (scm_check_entry_p && SCM_TRAPS_P) |
1916 | { | |
bc76d628 DH |
1917 | if (SCM_ENTER_FRAME_P |
1918 | || (SCM_BREAKPOINTS_P && scm_c_source_property_breakpoint_p (x))) | |
5132eef0 | 1919 | { |
bc76d628 DH |
1920 | SCM stackrep; |
1921 | SCM tail = SCM_BOOL (SCM_TAILRECP (debug)); | |
5132eef0 DH |
1922 | SCM_SET_TAILREC (debug); |
1923 | if (SCM_CHEAPTRAPS_P) | |
bc76d628 | 1924 | stackrep = scm_make_debugobj (&debug); |
5132eef0 DH |
1925 | else |
1926 | { | |
1927 | int first; | |
1928 | SCM val = scm_make_continuation (&first); | |
1929 | ||
1930 | if (first) | |
bc76d628 | 1931 | stackrep = val; |
5132eef0 DH |
1932 | else |
1933 | { | |
1934 | x = val; | |
1935 | if (SCM_IMP (x)) | |
1936 | RETURN (x); | |
1937 | else | |
1938 | /* This gives the possibility for the debugger to | |
1939 | modify the source expression before evaluation. */ | |
1940 | goto dispatch; | |
1941 | } | |
1942 | } | |
1943 | SCM_TRAPS_P = 0; | |
1944 | scm_call_4 (SCM_ENTER_FRAME_HDLR, | |
1945 | scm_sym_enter_frame, | |
bc76d628 | 1946 | stackrep, |
5132eef0 DH |
1947 | tail, |
1948 | scm_unmemocopy (x, env)); | |
1949 | SCM_TRAPS_P = 1; | |
1950 | } | |
1951 | } | |
6dbd0af5 | 1952 | #endif |
e3173f93 | 1953 | #if defined (USE_THREADS) || defined (DEVAL) |
f8769b1d | 1954 | dispatch: |
e3173f93 | 1955 | #endif |
9cb5124f | 1956 | SCM_TICK; |
0f2d19dd JB |
1957 | switch (SCM_TYP7 (x)) |
1958 | { | |
28b06554 | 1959 | case scm_tc7_symbol: |
a392ee15 | 1960 | /* Only happens when called at top level. */ |
0f2d19dd | 1961 | x = scm_cons (x, SCM_UNDEFINED); |
ddea3325 | 1962 | RETURN (*scm_lookupcar (x, env, 1)); |
0f2d19dd | 1963 | |
6a0f6ff3 | 1964 | case SCM_BIT8 (SCM_IM_AND): |
0f2d19dd | 1965 | x = SCM_CDR (x); |
302c12b4 DH |
1966 | while (!SCM_NULLP (SCM_CDR (x))) |
1967 | { | |
38ace99e DH |
1968 | SCM test_result = EVALCAR (x, env); |
1969 | if (SCM_FALSEP (test_result) || SCM_NILP (test_result)) | |
0f2d19dd | 1970 | RETURN (SCM_BOOL_F); |
302c12b4 DH |
1971 | else |
1972 | x = SCM_CDR (x); | |
1973 | } | |
6dbd0af5 | 1974 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
1975 | goto carloop; |
1976 | ||
6a0f6ff3 | 1977 | case SCM_BIT8 (SCM_IM_BEGIN): |
e050d4f8 DH |
1978 | x = SCM_CDR (x); |
1979 | if (SCM_NULLP (x)) | |
b8113bc8 MV |
1980 | RETURN (SCM_UNSPECIFIED); |
1981 | ||
6dbd0af5 | 1982 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
1983 | |
1984 | begin: | |
4163eb72 MV |
1985 | /* If we are on toplevel with a lookup closure, we need to sync |
1986 | with the current module. */ | |
22a52da1 | 1987 | if (SCM_CONSP (env) && !SCM_CONSP (SCM_CAR (env))) |
4163eb72 | 1988 | { |
d9d39d76 | 1989 | UPDATE_TOPLEVEL_ENV (env); |
302c12b4 | 1990 | while (!SCM_NULLP (SCM_CDR (x))) |
4163eb72 | 1991 | { |
5280aaca | 1992 | EVALCAR (x, env); |
d9d39d76 | 1993 | UPDATE_TOPLEVEL_ENV (env); |
302c12b4 | 1994 | x = SCM_CDR (x); |
4163eb72 | 1995 | } |
5280aaca | 1996 | goto carloop; |
4163eb72 MV |
1997 | } |
1998 | else | |
5280aaca MV |
1999 | goto nontoplevel_begin; |
2000 | ||
5280aaca | 2001 | nontoplevel_begin: |
302c12b4 | 2002 | while (!SCM_NULLP (SCM_CDR (x))) |
0f2d19dd | 2003 | { |
6a0f6ff3 DH |
2004 | SCM form = SCM_CAR (x); |
2005 | if (SCM_IMP (form)) | |
26d5b9b4 | 2006 | { |
6a0f6ff3 | 2007 | if (SCM_ISYMP (form)) |
26d5b9b4 | 2008 | { |
5280aaca MV |
2009 | x = scm_m_expand_body (x, env); |
2010 | goto nontoplevel_begin; | |
26d5b9b4 | 2011 | } |
4163eb72 | 2012 | else |
6a0f6ff3 | 2013 | SCM_VALIDATE_NON_EMPTY_COMBINATION (form); |
26d5b9b4 | 2014 | } |
5280aaca | 2015 | else |
6a0f6ff3 | 2016 | SCM_CEVAL (form, env); |
302c12b4 | 2017 | x = SCM_CDR (x); |
0f2d19dd | 2018 | } |
5280aaca | 2019 | |
6a0f6ff3 DH |
2020 | carloop: |
2021 | { | |
2022 | /* scm_eval last form in list */ | |
2023 | SCM last_form = SCM_CAR (x); | |
0f2d19dd | 2024 | |
6a0f6ff3 DH |
2025 | if (SCM_CONSP (last_form)) |
2026 | { | |
2027 | /* This is by far the most frequent case. */ | |
2028 | x = last_form; | |
2029 | goto loop; /* tail recurse */ | |
2030 | } | |
2031 | else if (SCM_IMP (last_form)) | |
2032 | RETURN (SCM_EVALIM (last_form, env)); | |
2033 | else if (SCM_VARIABLEP (last_form)) | |
2034 | RETURN (SCM_VARIABLE_REF (last_form)); | |
2035 | else if (SCM_SYMBOLP (last_form)) | |
2036 | RETURN (*scm_lookupcar (x, env, 1)); | |
2037 | else | |
2038 | RETURN (last_form); | |
2039 | } | |
0f2d19dd JB |
2040 | |
2041 | ||
38ace99e | 2042 | case SCM_BIT8 (SCM_IM_CASE): |
0f2d19dd | 2043 | x = SCM_CDR (x); |
6a0f6ff3 DH |
2044 | { |
2045 | SCM key = EVALCAR (x, env); | |
2046 | x = SCM_CDR (x); | |
2047 | while (!SCM_NULLP (x)) | |
2048 | { | |
2049 | SCM clause = SCM_CAR (x); | |
2050 | SCM labels = SCM_CAR (clause); | |
2051 | if (SCM_EQ_P (labels, scm_sym_else)) | |
2052 | { | |
2053 | x = SCM_CDR (clause); | |
2054 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2055 | goto begin; | |
2056 | } | |
2057 | while (!SCM_NULLP (labels)) | |
2058 | { | |
2059 | SCM label = SCM_CAR (labels); | |
2060 | if (SCM_EQ_P (label, key) || !SCM_FALSEP (scm_eqv_p (label, key))) | |
2061 | { | |
2062 | x = SCM_CDR (clause); | |
2063 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2064 | goto begin; | |
2065 | } | |
2066 | labels = SCM_CDR (labels); | |
2067 | } | |
2068 | x = SCM_CDR (x); | |
2069 | } | |
2070 | } | |
ddea3325 | 2071 | RETURN (SCM_UNSPECIFIED); |
0f2d19dd JB |
2072 | |
2073 | ||
8ea46249 DH |
2074 | case SCM_BIT8 (SCM_IM_COND): |
2075 | x = SCM_CDR (x); | |
2076 | while (!SCM_NULLP (x)) | |
0f2d19dd | 2077 | { |
e5cb71a0 DH |
2078 | SCM clause = SCM_CAR (x); |
2079 | if (SCM_EQ_P (SCM_CAR (clause), scm_sym_else)) | |
8ea46249 | 2080 | { |
e5cb71a0 | 2081 | x = SCM_CDR (clause); |
8ea46249 DH |
2082 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
2083 | goto begin; | |
2084 | } | |
e5cb71a0 | 2085 | else |
0f2d19dd | 2086 | { |
dff98306 DH |
2087 | arg1 = EVALCAR (clause, env); |
2088 | if (!SCM_FALSEP (arg1) && !SCM_NILP (arg1)) | |
6dbd0af5 | 2089 | { |
e5cb71a0 DH |
2090 | x = SCM_CDR (clause); |
2091 | if (SCM_NULLP (x)) | |
dff98306 | 2092 | RETURN (arg1); |
e5cb71a0 DH |
2093 | else if (!SCM_EQ_P (SCM_CAR (x), scm_sym_arrow)) |
2094 | { | |
2095 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2096 | goto begin; | |
2097 | } | |
2098 | else | |
2099 | { | |
2100 | proc = SCM_CDR (x); | |
2101 | proc = EVALCAR (proc, env); | |
2102 | SCM_ASRTGO (!SCM_IMP (proc), badfun); | |
dff98306 | 2103 | PREP_APPLY (proc, scm_list_1 (arg1)); |
e5cb71a0 DH |
2104 | ENTER_APPLY; |
2105 | if (SCM_CLOSUREP(proc) && scm_badformalsp (proc, 1)) | |
2106 | goto umwrongnumargs; | |
2107 | else | |
2108 | goto evap1; | |
2109 | } | |
6dbd0af5 | 2110 | } |
e5cb71a0 | 2111 | x = SCM_CDR (x); |
0f2d19dd JB |
2112 | } |
2113 | } | |
ddea3325 | 2114 | RETURN (SCM_UNSPECIFIED); |
0f2d19dd JB |
2115 | |
2116 | ||
e5cb71a0 | 2117 | case SCM_BIT8 (SCM_IM_DO): |
0f2d19dd | 2118 | x = SCM_CDR (x); |
e5cb71a0 DH |
2119 | { |
2120 | /* Compute the initialization values and the initial environment. */ | |
2121 | SCM init_forms = SCM_CADR (x); | |
2122 | SCM init_values = SCM_EOL; | |
2123 | while (!SCM_NULLP (init_forms)) | |
2124 | { | |
2125 | init_values = scm_cons (EVALCAR (init_forms, env), init_values); | |
2126 | init_forms = SCM_CDR (init_forms); | |
2127 | } | |
2128 | env = EXTEND_ENV (SCM_CAR (x), init_values, env); | |
2129 | } | |
8ea46249 | 2130 | x = SCM_CDDR (x); |
e5cb71a0 DH |
2131 | { |
2132 | SCM test_form = SCM_CAR (x); | |
2133 | SCM body_forms = SCM_CADR (x); | |
2134 | SCM step_forms = SCM_CDDR (x); | |
2135 | ||
2136 | SCM test_result = EVALCAR (test_form, env); | |
2137 | ||
2138 | while (SCM_FALSEP (test_result) || SCM_NILP (test_result)) | |
2139 | { | |
0f2d19dd | 2140 | { |
e5cb71a0 DH |
2141 | /* Evaluate body forms. */ |
2142 | SCM temp_forms; | |
2143 | for (temp_forms = body_forms; | |
2144 | !SCM_NULLP (temp_forms); | |
2145 | temp_forms = SCM_CDR (temp_forms)) | |
2146 | { | |
2147 | SCM form = SCM_CAR (temp_forms); | |
2148 | /* Dirk:FIXME: We only need to eval forms, that may have a | |
2149 | * side effect here. This is only true for forms that start | |
2150 | * with a pair. All others are just constants. However, | |
2151 | * since in the common case there is no constant expression | |
2152 | * in a body of a do form, we just check for immediates here | |
2153 | * and have SCM_CEVAL take care of other cases. In the long | |
2154 | * run it would make sense to get rid of this test and have | |
2155 | * the macro transformer of 'do' eliminate all forms that | |
2156 | * have no sideeffect. */ | |
2157 | if (!SCM_IMP (form)) | |
2158 | SCM_CEVAL (form, env); | |
2159 | } | |
0f2d19dd | 2160 | } |
e5cb71a0 DH |
2161 | |
2162 | { | |
2163 | /* Evaluate the step expressions. */ | |
2164 | SCM temp_forms; | |
2165 | SCM step_values = SCM_EOL; | |
2166 | for (temp_forms = step_forms; | |
2167 | !SCM_NULLP (temp_forms); | |
2168 | temp_forms = SCM_CDR (temp_forms)) | |
2169 | { | |
2170 | SCM value = EVALCAR (temp_forms, env); | |
2171 | step_values = scm_cons (value, step_values); | |
2172 | } | |
2173 | env = EXTEND_ENV (SCM_CAAR (env), step_values, SCM_CDR (env)); | |
2174 | } | |
2175 | ||
2176 | test_result = EVALCAR (test_form, env); | |
2177 | } | |
2178 | } | |
2179 | x = SCM_CDAR (x); | |
0f2d19dd | 2180 | if (SCM_NULLP (x)) |
6dbd0af5 MD |
2181 | RETURN (SCM_UNSPECIFIED); |
2182 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
5280aaca | 2183 | goto nontoplevel_begin; |
0f2d19dd JB |
2184 | |
2185 | ||
38ace99e | 2186 | case SCM_BIT8 (SCM_IM_IF): |
0f2d19dd | 2187 | x = SCM_CDR (x); |
38ace99e DH |
2188 | { |
2189 | SCM test_result = EVALCAR (x, env); | |
2190 | if (!SCM_FALSEP (test_result) && !SCM_NILP (test_result)) | |
2191 | x = SCM_CDR (x); | |
2192 | else | |
2193 | { | |
2194 | x = SCM_CDDR (x); | |
2195 | if (SCM_NULLP (x)) | |
2196 | RETURN (SCM_UNSPECIFIED); | |
2197 | } | |
2198 | } | |
6dbd0af5 | 2199 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
2200 | goto carloop; |
2201 | ||
2202 | ||
38ace99e | 2203 | case SCM_BIT8 (SCM_IM_LET): |
0f2d19dd | 2204 | x = SCM_CDR (x); |
38ace99e DH |
2205 | { |
2206 | SCM init_forms = SCM_CADR (x); | |
2207 | SCM init_values = SCM_EOL; | |
2208 | do | |
2209 | { | |
2210 | init_values = scm_cons (EVALCAR (init_forms, env), init_values); | |
2211 | init_forms = SCM_CDR (init_forms); | |
2212 | } | |
2213 | while (!SCM_NULLP (init_forms)); | |
2214 | env = EXTEND_ENV (SCM_CAR (x), init_values, env); | |
2215 | } | |
e050d4f8 DH |
2216 | x = SCM_CDDR (x); |
2217 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2218 | goto nontoplevel_begin; | |
0f2d19dd JB |
2219 | |
2220 | ||
38ace99e | 2221 | case SCM_BIT8 (SCM_IM_LETREC): |
0f2d19dd | 2222 | x = SCM_CDR (x); |
e2806c10 | 2223 | env = EXTEND_ENV (SCM_CAR (x), scm_undefineds, env); |
0f2d19dd | 2224 | x = SCM_CDR (x); |
38ace99e DH |
2225 | { |
2226 | SCM init_forms = SCM_CAR (x); | |
2227 | SCM init_values = SCM_EOL; | |
2228 | do | |
2229 | { | |
2230 | init_values = scm_cons (EVALCAR (init_forms, env), init_values); | |
2231 | init_forms = SCM_CDR (init_forms); | |
2232 | } | |
2233 | while (!SCM_NULLP (init_forms)); | |
2234 | SCM_SETCDR (SCM_CAR (env), init_values); | |
2235 | } | |
e050d4f8 DH |
2236 | x = SCM_CDR (x); |
2237 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2238 | goto nontoplevel_begin; | |
0f2d19dd JB |
2239 | |
2240 | ||
38ace99e | 2241 | case SCM_BIT8 (SCM_IM_LETSTAR): |
0f2d19dd | 2242 | x = SCM_CDR (x); |
302c12b4 DH |
2243 | { |
2244 | SCM bindings = SCM_CAR (x); | |
2245 | if (SCM_NULLP (bindings)) | |
e2806c10 | 2246 | env = EXTEND_ENV (SCM_EOL, SCM_EOL, env); |
302c12b4 DH |
2247 | else |
2248 | { | |
2249 | do | |
2250 | { | |
2251 | SCM name = SCM_CAR (bindings); | |
2252 | SCM init = SCM_CDR (bindings); | |
2253 | env = EXTEND_ENV (name, EVALCAR (init, env), env); | |
2254 | bindings = SCM_CDR (init); | |
2255 | } | |
2256 | while (!SCM_NULLP (bindings)); | |
2257 | } | |
2258 | } | |
e050d4f8 DH |
2259 | x = SCM_CDR (x); |
2260 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2261 | goto nontoplevel_begin; | |
0f2d19dd | 2262 | |
302c12b4 | 2263 | |
38ace99e | 2264 | case SCM_BIT8 (SCM_IM_OR): |
0f2d19dd | 2265 | x = SCM_CDR (x); |
302c12b4 | 2266 | while (!SCM_NULLP (SCM_CDR (x))) |
0f2d19dd | 2267 | { |
302c12b4 | 2268 | SCM val = EVALCAR (x, env); |
c96d76b8 | 2269 | if (!SCM_FALSEP (val) && !SCM_NILP (val)) |
302c12b4 DH |
2270 | RETURN (val); |
2271 | else | |
2272 | x = SCM_CDR (x); | |
0f2d19dd | 2273 | } |
6dbd0af5 | 2274 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
2275 | goto carloop; |
2276 | ||
2277 | ||
38ace99e | 2278 | case SCM_BIT8 (SCM_IM_LAMBDA): |
0f2d19dd JB |
2279 | RETURN (scm_closure (SCM_CDR (x), env)); |
2280 | ||
2281 | ||
38ace99e | 2282 | case SCM_BIT8 (SCM_IM_QUOTE): |
8ea46249 | 2283 | RETURN (SCM_CADR (x)); |
0f2d19dd JB |
2284 | |
2285 | ||
38ace99e | 2286 | case SCM_BIT8 (SCM_IM_SET_X): |
0f2d19dd | 2287 | x = SCM_CDR (x); |
38ace99e DH |
2288 | { |
2289 | SCM *location; | |
2290 | SCM variable = SCM_CAR (x); | |
e050d4f8 | 2291 | if (SCM_ILOCP (variable)) |
38ace99e | 2292 | location = scm_ilookup (variable, env); |
3063e30a | 2293 | else if (SCM_VARIABLEP (variable)) |
e050d4f8 | 2294 | location = SCM_VARIABLE_LOC (variable); |
38ace99e DH |
2295 | else /* (SCM_SYMBOLP (variable)) is known to be true */ |
2296 | location = scm_lookupcar (x, env, 1); | |
2297 | x = SCM_CDR (x); | |
2298 | *location = EVALCAR (x, env); | |
2299 | } | |
0f2d19dd | 2300 | RETURN (SCM_UNSPECIFIED); |
0f2d19dd JB |
2301 | |
2302 | ||
c209c88e | 2303 | case SCM_BIT8(SCM_IM_DEFINE): /* only for internal defines */ |
26d5b9b4 MD |
2304 | scm_misc_error (NULL, "Bad define placement", SCM_EOL); |
2305 | ||
38ace99e | 2306 | |
0f2d19dd | 2307 | /* new syntactic forms go here. */ |
3f04400d | 2308 | case SCM_BIT8 (SCM_MAKISYM (0)): |
0f2d19dd JB |
2309 | proc = SCM_CAR (x); |
2310 | SCM_ASRTGO (SCM_ISYMP (proc), badfun); | |
a392ee15 | 2311 | switch (SCM_ISYMNUM (proc)) |
0f2d19dd | 2312 | { |
3f04400d DH |
2313 | |
2314 | ||
0f2d19dd JB |
2315 | case (SCM_ISYMNUM (SCM_IM_APPLY)): |
2316 | proc = SCM_CDR (x); | |
2317 | proc = EVALCAR (proc, env); | |
3f04400d | 2318 | SCM_ASRTGO (!SCM_IMP (proc), badfun); |
0f2d19dd JB |
2319 | if (SCM_CLOSUREP (proc)) |
2320 | { | |
6dbd0af5 | 2321 | PREP_APPLY (proc, SCM_EOL); |
dff98306 DH |
2322 | arg1 = SCM_CDDR (x); |
2323 | arg1 = EVALCAR (arg1, env); | |
a513ead3 MV |
2324 | apply_closure: |
2325 | /* Go here to tail-call a closure. PROC is the closure | |
dff98306 DH |
2326 | and ARG1 is the list of arguments. Do not forget to |
2327 | call PREP_APPLY. */ | |
3f04400d DH |
2328 | { |
2329 | SCM formals = SCM_CLOSURE_FORMALS (proc); | |
6dbd0af5 | 2330 | #ifdef DEVAL |
dff98306 | 2331 | debug.info->a.args = arg1; |
6dbd0af5 | 2332 | #endif |
dff98306 | 2333 | if (scm_badargsp (formals, arg1)) |
ab1f1094 | 2334 | scm_wrong_num_args (proc); |
3f04400d DH |
2335 | ENTER_APPLY; |
2336 | /* Copy argument list */ | |
dff98306 | 2337 | if (SCM_NULL_OR_NIL_P (arg1)) |
3f04400d DH |
2338 | env = EXTEND_ENV (formals, SCM_EOL, SCM_ENV (proc)); |
2339 | else | |
2340 | { | |
dff98306 | 2341 | SCM args = scm_list_1 (SCM_CAR (arg1)); |
3f04400d | 2342 | SCM tail = args; |
dff98306 DH |
2343 | arg1 = SCM_CDR (arg1); |
2344 | while (!SCM_NULL_OR_NIL_P (arg1)) | |
3f04400d | 2345 | { |
dff98306 | 2346 | SCM new_tail = scm_list_1 (SCM_CAR (arg1)); |
3f04400d DH |
2347 | SCM_SETCDR (tail, new_tail); |
2348 | tail = new_tail; | |
dff98306 | 2349 | arg1 = SCM_CDR (arg1); |
3f04400d DH |
2350 | } |
2351 | env = EXTEND_ENV (formals, args, SCM_ENV (proc)); | |
2352 | } | |
1609038c | 2353 | |
3f04400d DH |
2354 | x = SCM_CLOSURE_BODY (proc); |
2355 | goto nontoplevel_begin; | |
2356 | } | |
0f2d19dd | 2357 | } |
3f04400d DH |
2358 | else |
2359 | { | |
2360 | proc = scm_f_apply; | |
2361 | goto evapply; | |
2362 | } | |
2363 | ||
0f2d19dd JB |
2364 | |
2365 | case (SCM_ISYMNUM (SCM_IM_CONT)): | |
5f144b10 GH |
2366 | { |
2367 | int first; | |
2368 | SCM val = scm_make_continuation (&first); | |
2369 | ||
e050d4f8 | 2370 | if (!first) |
5f144b10 | 2371 | RETURN (val); |
e050d4f8 DH |
2372 | else |
2373 | { | |
2374 | arg1 = val; | |
2375 | proc = SCM_CDR (x); | |
2376 | proc = scm_eval_car (proc, env); | |
2377 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
2378 | PREP_APPLY (proc, scm_list_1 (arg1)); | |
2379 | ENTER_APPLY; | |
2380 | if (SCM_CLOSUREP(proc) && scm_badformalsp (proc, 1)) | |
2381 | goto umwrongnumargs; | |
2382 | goto evap1; | |
2383 | } | |
5f144b10 | 2384 | } |
e050d4f8 | 2385 | |
0f2d19dd | 2386 | |
a570e93a | 2387 | case (SCM_ISYMNUM (SCM_IM_DELAY)): |
ddea3325 | 2388 | RETURN (scm_makprom (scm_closure (SCM_CDR (x), env))); |
a570e93a | 2389 | |
e050d4f8 | 2390 | |
89efbff4 | 2391 | case (SCM_ISYMNUM (SCM_IM_DISPATCH)): |
61364ba6 | 2392 | { |
f12745b6 | 2393 | /* If not done yet, evaluate the operand forms. The result is a |
dff98306 | 2394 | * list of arguments stored in arg1, which is used to perform the |
f12745b6 DH |
2395 | * function dispatch. */ |
2396 | SCM operand_forms = SCM_CADR (x); | |
2397 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2398 | if (SCM_ILOCP (operand_forms)) | |
dff98306 | 2399 | arg1 = *scm_ilookup (operand_forms, env); |
f12745b6 | 2400 | else if (SCM_VARIABLEP (operand_forms)) |
dff98306 | 2401 | arg1 = SCM_VARIABLE_REF (operand_forms); |
f12745b6 | 2402 | else if (!SCM_CONSP (operand_forms)) |
dff98306 | 2403 | arg1 = *scm_lookupcar (SCM_CDR (x), env, 1); |
61364ba6 MD |
2404 | else |
2405 | { | |
dff98306 | 2406 | SCM tail = arg1 = scm_list_1 (EVALCAR (operand_forms, env)); |
f12745b6 DH |
2407 | operand_forms = SCM_CDR (operand_forms); |
2408 | while (!SCM_NULLP (operand_forms)) | |
2409 | { | |
2410 | SCM new_tail = scm_list_1 (EVALCAR (operand_forms, env)); | |
2411 | SCM_SETCDR (tail, new_tail); | |
2412 | tail = new_tail; | |
2413 | operand_forms = SCM_CDR (operand_forms); | |
2414 | } | |
2415 | } | |
2416 | } | |
2417 | ||
2418 | /* The type dispatch code is duplicated below | |
2419 | * (c.f. objects.c:scm_mcache_compute_cmethod) since that | |
2420 | * cuts down execution time for type dispatch to 50%. */ | |
dff98306 | 2421 | type_dispatch: /* inputs: x, arg1 */ |
f12745b6 DH |
2422 | /* Type dispatch means to determine from the types of the function |
2423 | * arguments (i. e. the 'signature' of the call), which method from | |
2424 | * a generic function is to be called. This process of selecting | |
2425 | * the right method takes some time. To speed it up, guile uses | |
2426 | * caching: Together with the macro call to dispatch the signatures | |
2427 | * of some previous calls to that generic function from the same | |
2428 | * place are stored (in the code!) in a cache that we call the | |
2429 | * 'method cache'. This is done since it is likely, that | |
2430 | * consecutive calls to dispatch from that position in the code will | |
2431 | * have the same signature. Thus, the type dispatch works as | |
2432 | * follows: First, determine a hash value from the signature of the | |
2433 | * actual arguments. Second, use this hash value as an index to | |
2434 | * find that same signature in the method cache stored at this | |
2435 | * position in the code. If found, you have also found the | |
2436 | * corresponding method that belongs to that signature. If the | |
2437 | * signature is not found in the method cache, you have to perform a | |
2438 | * full search over all signatures stored with the generic | |
2439 | * function. */ | |
2440 | { | |
2441 | unsigned long int specializers; | |
2442 | unsigned long int hash_value; | |
2443 | unsigned long int cache_end_pos; | |
2444 | unsigned long int mask; | |
2445 | SCM method_cache; | |
2446 | ||
2447 | { | |
2448 | SCM z = SCM_CDDR (x); | |
2449 | SCM tmp = SCM_CADR (z); | |
2450 | specializers = SCM_INUM (SCM_CAR (z)); | |
2451 | ||
2452 | /* Compute a hash value for searching the method cache. There | |
2453 | * are two variants for computing the hash value, a (rather) | |
2454 | * complicated one, and a simple one. For the complicated one | |
2455 | * explained below, tmp holds a number that is used in the | |
2456 | * computation. */ | |
2457 | if (SCM_INUMP (tmp)) | |
2458 | { | |
2459 | /* Use the signature of the actual arguments to determine | |
2460 | * the hash value. This is done as follows: Each class has | |
2461 | * an array of random numbers, that are determined when the | |
2462 | * class is created. The integer 'hashset' is an index into | |
2463 | * that array of random numbers. Now, from all classes that | |
2464 | * are part of the signature of the actual arguments, the | |
2465 | * random numbers at index 'hashset' are taken and summed | |
2466 | * up, giving the hash value. The value of 'hashset' is | |
2467 | * stored at the call to dispatch. This allows to have | |
2468 | * different 'formulas' for calculating the hash value at | |
2469 | * different places where dispatch is called. This allows | |
2470 | * to optimize the hash formula at every individual place | |
2471 | * where dispatch is called, such that hopefully the hash | |
2472 | * value that is computed will directly point to the right | |
2473 | * method in the method cache. */ | |
2474 | unsigned long int hashset = SCM_INUM (tmp); | |
2475 | unsigned long int counter = specializers + 1; | |
dff98306 | 2476 | SCM tmp_arg = arg1; |
f12745b6 DH |
2477 | hash_value = 0; |
2478 | while (!SCM_NULLP (tmp_arg) && counter != 0) | |
61364ba6 | 2479 | { |
f12745b6 DH |
2480 | SCM class = scm_class_of (SCM_CAR (tmp_arg)); |
2481 | hash_value += SCM_INSTANCE_HASH (class, hashset); | |
2482 | tmp_arg = SCM_CDR (tmp_arg); | |
2483 | counter--; | |
61364ba6 | 2484 | } |
f12745b6 DH |
2485 | z = SCM_CDDR (z); |
2486 | method_cache = SCM_CADR (z); | |
2487 | mask = SCM_INUM (SCM_CAR (z)); | |
2488 | hash_value &= mask; | |
2489 | cache_end_pos = hash_value; | |
2490 | } | |
2491 | else | |
2492 | { | |
2493 | /* This method of determining the hash value is much | |
2494 | * simpler: Set the hash value to zero and just perform a | |
2495 | * linear search through the method cache. */ | |
2496 | method_cache = tmp; | |
2497 | mask = (unsigned long int) ((long) -1); | |
2498 | hash_value = 0; | |
2499 | cache_end_pos = SCM_VECTOR_LENGTH (method_cache); | |
2500 | } | |
2501 | } | |
61364ba6 | 2502 | |
f12745b6 DH |
2503 | { |
2504 | /* Search the method cache for a method with a matching | |
2505 | * signature. Start the search at position 'hash_value'. The | |
2506 | * hashing implementation uses linear probing for conflict | |
2507 | * resolution, that is, if the signature in question is not | |
2508 | * found at the starting index in the hash table, the next table | |
2509 | * entry is tried, and so on, until in the worst case the whole | |
2510 | * cache has been searched, but still the signature has not been | |
2511 | * found. */ | |
2512 | SCM z; | |
2513 | do | |
2514 | { | |
dff98306 | 2515 | SCM args = arg1; /* list of arguments */ |
f12745b6 DH |
2516 | z = SCM_VELTS (method_cache)[hash_value]; |
2517 | while (!SCM_NULLP (args)) | |
61364ba6 MD |
2518 | { |
2519 | /* More arguments than specifiers => CLASS != ENV */ | |
f12745b6 DH |
2520 | SCM class_of_arg = scm_class_of (SCM_CAR (args)); |
2521 | if (!SCM_EQ_P (class_of_arg, SCM_CAR (z))) | |
61364ba6 | 2522 | goto next_method; |
f12745b6 | 2523 | args = SCM_CDR (args); |
61364ba6 MD |
2524 | z = SCM_CDR (z); |
2525 | } | |
f12745b6 DH |
2526 | /* Fewer arguments than specifiers => CAR != ENV */ |
2527 | if (SCM_NULLP (SCM_CAR (z)) || SCM_CONSP (SCM_CAR (z))) | |
2528 | goto apply_cmethod; | |
2529 | next_method: | |
2530 | hash_value = (hash_value + 1) & mask; | |
2531 | } while (hash_value != cache_end_pos); | |
2532 | ||
2533 | /* No appropriate method was found in the cache. */ | |
dff98306 | 2534 | z = scm_memoize_method (x, arg1); |
f12745b6 | 2535 | |
dff98306 | 2536 | apply_cmethod: /* inputs: z, arg1 */ |
f12745b6 DH |
2537 | { |
2538 | SCM formals = SCM_CMETHOD_FORMALS (z); | |
dff98306 | 2539 | env = EXTEND_ENV (formals, arg1, SCM_CMETHOD_ENV (z)); |
f12745b6 DH |
2540 | x = SCM_CMETHOD_BODY (z); |
2541 | goto nontoplevel_begin; | |
2542 | } | |
2543 | } | |
61364ba6 | 2544 | } |
73b64342 | 2545 | |
1d15ecd3 | 2546 | |
ca4be6ea MD |
2547 | case (SCM_ISYMNUM (SCM_IM_SLOT_REF)): |
2548 | x = SCM_CDR (x); | |
1d15ecd3 DH |
2549 | { |
2550 | SCM instance = EVALCAR (x, env); | |
2551 | unsigned long int slot = SCM_INUM (SCM_CADR (x)); | |
2552 | RETURN (SCM_PACK (SCM_STRUCT_DATA (instance) [slot])); | |
2553 | } | |
2554 | ||
2555 | ||
ca4be6ea MD |
2556 | case (SCM_ISYMNUM (SCM_IM_SLOT_SET_X)): |
2557 | x = SCM_CDR (x); | |
1d15ecd3 DH |
2558 | { |
2559 | SCM instance = EVALCAR (x, env); | |
2560 | unsigned long int slot = SCM_INUM (SCM_CADR (x)); | |
2561 | SCM value = EVALCAR (SCM_CDDR (x), env); | |
2562 | SCM_STRUCT_DATA (instance) [slot] = SCM_UNPACK (value); | |
2563 | RETURN (SCM_UNSPECIFIED); | |
2564 | } | |
2565 | ||
c96d76b8 NJ |
2566 | |
2567 | #ifdef SCM_ENABLE_ELISP | |
ca4be6ea | 2568 | |
73b64342 | 2569 | case (SCM_ISYMNUM (SCM_IM_NIL_COND)): |
1d15ecd3 DH |
2570 | { |
2571 | SCM test_form = SCM_CDR (x); | |
2572 | x = SCM_CDR (test_form); | |
2573 | while (!SCM_NULL_OR_NIL_P (x)) | |
2574 | { | |
2575 | SCM test_result = EVALCAR (test_form, env); | |
2576 | if (!(SCM_FALSEP (test_result) | |
2577 | || SCM_NULL_OR_NIL_P (test_result))) | |
2578 | { | |
2579 | if (SCM_EQ_P (SCM_CAR (x), SCM_UNSPECIFIED)) | |
2580 | RETURN (test_result); | |
2581 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2582 | goto carloop; | |
2583 | } | |
2584 | else | |
2585 | { | |
2586 | test_form = SCM_CDR (x); | |
2587 | x = SCM_CDR (test_form); | |
2588 | } | |
2589 | } | |
2590 | x = test_form; | |
2591 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2592 | goto carloop; | |
2593 | } | |
73b64342 | 2594 | |
c96d76b8 | 2595 | #endif /* SCM_ENABLE_ELISP */ |
73b64342 MD |
2596 | |
2597 | case (SCM_ISYMNUM (SCM_IM_BIND)): | |
2e171178 MV |
2598 | { |
2599 | SCM vars, exps, vals; | |
73b64342 | 2600 | |
2e171178 MV |
2601 | x = SCM_CDR (x); |
2602 | vars = SCM_CAAR (x); | |
2603 | exps = SCM_CDAR (x); | |
2604 | ||
2605 | vals = SCM_EOL; | |
2606 | ||
2607 | while (SCM_NIMP (exps)) | |
2608 | { | |
2609 | vals = scm_cons (EVALCAR (exps, env), vals); | |
2610 | exps = SCM_CDR (exps); | |
2611 | } | |
2612 | ||
2613 | scm_swap_bindings (vars, vals); | |
2614 | scm_dynwinds = scm_acons (vars, vals, scm_dynwinds); | |
1d15ecd3 DH |
2615 | |
2616 | /* Ignore all but the last evaluation result. */ | |
2617 | for (x = SCM_CDR (x); !SCM_NULLP (SCM_CDR (x)); x = SCM_CDR (x)) | |
2e171178 | 2618 | { |
1d15ecd3 DH |
2619 | if (SCM_CONSP (SCM_CAR (x))) |
2620 | SCM_CEVAL (SCM_CAR (x), env); | |
2e171178 MV |
2621 | } |
2622 | proc = EVALCAR (x, env); | |
73b64342 | 2623 | |
2e171178 MV |
2624 | scm_dynwinds = SCM_CDR (scm_dynwinds); |
2625 | scm_swap_bindings (vars, vals); | |
73b64342 | 2626 | |
ddea3325 | 2627 | RETURN (proc); |
2e171178 | 2628 | } |
c96d76b8 | 2629 | |
1d15ecd3 | 2630 | |
a513ead3 MV |
2631 | case (SCM_ISYMNUM (SCM_IM_CALL_WITH_VALUES)): |
2632 | { | |
2633 | proc = SCM_CDR (x); | |
2634 | x = EVALCAR (proc, env); | |
2635 | proc = SCM_CDR (proc); | |
2636 | proc = EVALCAR (proc, env); | |
dff98306 DH |
2637 | arg1 = SCM_APPLY (x, SCM_EOL, SCM_EOL); |
2638 | if (SCM_VALUESP (arg1)) | |
2639 | arg1 = scm_struct_ref (arg1, SCM_INUM0); | |
a513ead3 | 2640 | else |
dff98306 | 2641 | arg1 = scm_list_1 (arg1); |
a513ead3 MV |
2642 | if (SCM_CLOSUREP (proc)) |
2643 | { | |
dff98306 | 2644 | PREP_APPLY (proc, arg1); |
a513ead3 MV |
2645 | goto apply_closure; |
2646 | } | |
dff98306 | 2647 | return SCM_APPLY (proc, arg1, SCM_EOL); |
a513ead3 MV |
2648 | } |
2649 | ||
b7798e10 | 2650 | |
0f2d19dd JB |
2651 | default: |
2652 | goto badfun; | |
2653 | } | |
2654 | ||
2655 | default: | |
2656 | proc = x; | |
2657 | badfun: | |
1afff620 | 2658 | scm_misc_error (NULL, "Wrong type to apply: ~S", scm_list_1 (proc)); |
0f2d19dd JB |
2659 | case scm_tc7_vector: |
2660 | case scm_tc7_wvect: | |
afe5177e | 2661 | #ifdef HAVE_ARRAYS |
0f2d19dd JB |
2662 | case scm_tc7_bvect: |
2663 | case scm_tc7_byvect: | |
2664 | case scm_tc7_svect: | |
2665 | case scm_tc7_ivect: | |
2666 | case scm_tc7_uvect: | |
2667 | case scm_tc7_fvect: | |
2668 | case scm_tc7_dvect: | |
2669 | case scm_tc7_cvect: | |
5c11cc9d | 2670 | #ifdef HAVE_LONG_LONGS |
0f2d19dd | 2671 | case scm_tc7_llvect: |
afe5177e | 2672 | #endif |
0f2d19dd JB |
2673 | #endif |
2674 | case scm_tc7_string: | |
0f2d19dd JB |
2675 | case scm_tc7_smob: |
2676 | case scm_tcs_closures: | |
224822be | 2677 | case scm_tc7_cclo: |
89efbff4 | 2678 | case scm_tc7_pws: |
0f2d19dd | 2679 | case scm_tcs_subrs: |
904a077d | 2680 | case scm_tcs_struct: |
0f2d19dd JB |
2681 | RETURN (x); |
2682 | ||
d22a0ea1 | 2683 | case scm_tc7_variable: |
a130e982 | 2684 | RETURN (SCM_VARIABLE_REF(x)); |
d22a0ea1 | 2685 | |
c209c88e | 2686 | case SCM_BIT8(SCM_ILOC00): |
0f2d19dd JB |
2687 | proc = *scm_ilookup (SCM_CAR (x), env); |
2688 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
0f2d19dd | 2689 | goto checkargs; |
b7798e10 | 2690 | |
0f2d19dd | 2691 | case scm_tcs_cons_nimcar: |
e050d4f8 | 2692 | if (SCM_SYMBOLP (SCM_CAR (x))) |
0f2d19dd | 2693 | { |
e050d4f8 | 2694 | SCM orig_sym = SCM_CAR (x); |
f8769b1d | 2695 | #ifdef USE_THREADS |
b7798e10 DH |
2696 | { |
2697 | SCM *location = scm_lookupcar1 (x, env, 1); | |
2698 | if (location == NULL) | |
2699 | { | |
2700 | /* we have lost the race, start again. */ | |
2701 | goto dispatch; | |
2702 | } | |
2703 | proc = *location; | |
2704 | } | |
f8769b1d | 2705 | #else |
26d5b9b4 | 2706 | proc = *scm_lookupcar (x, env, 1); |
f8769b1d MV |
2707 | #endif |
2708 | ||
0f2d19dd JB |
2709 | if (SCM_IMP (proc)) |
2710 | { | |
86d31dfe MV |
2711 | SCM_SETCAR (x, orig_sym); /* Undo memoizing effect of |
2712 | lookupcar */ | |
0f2d19dd JB |
2713 | goto badfun; |
2714 | } | |
22a52da1 | 2715 | if (SCM_MACROP (proc)) |
0f2d19dd | 2716 | { |
86d31dfe MV |
2717 | SCM_SETCAR (x, orig_sym); /* Undo memoizing effect of |
2718 | lookupcar */ | |
e050d4f8 | 2719 | handle_a_macro: /* inputs: x, env, proc */ |
368bf056 | 2720 | #ifdef DEVAL |
7c354052 MD |
2721 | /* Set a flag during macro expansion so that macro |
2722 | application frames can be deleted from the backtrace. */ | |
2723 | SCM_SET_MACROEXP (debug); | |
368bf056 | 2724 | #endif |
dff98306 | 2725 | arg1 = SCM_APPLY (SCM_MACRO_CODE (proc), x, |
f8769b1d MV |
2726 | scm_cons (env, scm_listofnull)); |
2727 | ||
7c354052 MD |
2728 | #ifdef DEVAL |
2729 | SCM_CLEAR_MACROEXP (debug); | |
2730 | #endif | |
22a52da1 | 2731 | switch (SCM_MACRO_TYPE (proc)) |
0f2d19dd JB |
2732 | { |
2733 | case 2: | |
dff98306 DH |
2734 | if (scm_ilength (arg1) <= 0) |
2735 | arg1 = scm_list_2 (SCM_IM_BEGIN, arg1); | |
6dbd0af5 | 2736 | #ifdef DEVAL |
22a52da1 | 2737 | if (!SCM_CLOSUREP (SCM_MACRO_CODE (proc))) |
6dbd0af5 | 2738 | { |
6dbd0af5 | 2739 | SCM_DEFER_INTS; |
dff98306 DH |
2740 | SCM_SETCAR (x, SCM_CAR (arg1)); |
2741 | SCM_SETCDR (x, SCM_CDR (arg1)); | |
6dbd0af5 MD |
2742 | SCM_ALLOW_INTS; |
2743 | goto dispatch; | |
2744 | } | |
2745 | /* Prevent memoizing of debug info expression. */ | |
6203706f MD |
2746 | debug.info->e.exp = scm_cons_source (debug.info->e.exp, |
2747 | SCM_CAR (x), | |
2748 | SCM_CDR (x)); | |
6dbd0af5 | 2749 | #endif |
0f2d19dd | 2750 | SCM_DEFER_INTS; |
dff98306 DH |
2751 | SCM_SETCAR (x, SCM_CAR (arg1)); |
2752 | SCM_SETCDR (x, SCM_CDR (arg1)); | |
0f2d19dd | 2753 | SCM_ALLOW_INTS; |
680516ba DH |
2754 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
2755 | goto loop; | |
3063e30a | 2756 | #if SCM_ENABLE_DEPRECATED == 1 |
0f2d19dd | 2757 | case 1: |
680516ba DH |
2758 | x = arg1; |
2759 | if (SCM_NIMP (x)) | |
2760 | { | |
2761 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2762 | goto loop; | |
2763 | } | |
2764 | else | |
2765 | RETURN (arg1); | |
3063e30a | 2766 | #endif |
0f2d19dd | 2767 | case 0: |
dff98306 | 2768 | RETURN (arg1); |
0f2d19dd JB |
2769 | } |
2770 | } | |
2771 | } | |
2772 | else | |
2773 | proc = SCM_CEVAL (SCM_CAR (x), env); | |
22a52da1 | 2774 | SCM_ASRTGO (!SCM_IMP (proc), badfun); |
bd987b8e | 2775 | |
0f2d19dd | 2776 | checkargs: |
0f2d19dd JB |
2777 | if (SCM_CLOSUREP (proc)) |
2778 | { | |
e050d4f8 DH |
2779 | SCM formals = SCM_CLOSURE_FORMALS (proc); |
2780 | SCM args = SCM_CDR (x); | |
2781 | while (!SCM_NULLP (formals)) | |
0f2d19dd | 2782 | { |
e050d4f8 | 2783 | if (!SCM_CONSP (formals)) |
0f2d19dd | 2784 | goto evapply; |
e050d4f8 | 2785 | if (SCM_IMP (args)) |
0f2d19dd | 2786 | goto umwrongnumargs; |
e050d4f8 DH |
2787 | formals = SCM_CDR (formals); |
2788 | args = SCM_CDR (args); | |
0f2d19dd | 2789 | } |
e050d4f8 | 2790 | if (!SCM_NULLP (args)) |
0f2d19dd JB |
2791 | goto umwrongnumargs; |
2792 | } | |
22a52da1 | 2793 | else if (SCM_MACROP (proc)) |
0f2d19dd | 2794 | goto handle_a_macro; |
0f2d19dd JB |
2795 | } |
2796 | ||
2797 | ||
e050d4f8 | 2798 | evapply: /* inputs: x, proc */ |
6dbd0af5 MD |
2799 | PREP_APPLY (proc, SCM_EOL); |
2800 | if (SCM_NULLP (SCM_CDR (x))) { | |
2801 | ENTER_APPLY; | |
89efbff4 | 2802 | evap0: |
0f2d19dd JB |
2803 | switch (SCM_TYP7 (proc)) |
2804 | { /* no arguments given */ | |
2805 | case scm_tc7_subr_0: | |
2806 | RETURN (SCM_SUBRF (proc) ()); | |
2807 | case scm_tc7_subr_1o: | |
2808 | RETURN (SCM_SUBRF (proc) (SCM_UNDEFINED)); | |
2809 | case scm_tc7_lsubr: | |
2810 | RETURN (SCM_SUBRF (proc) (SCM_EOL)); | |
2811 | case scm_tc7_rpsubr: | |
2812 | RETURN (SCM_BOOL_T); | |
2813 | case scm_tc7_asubr: | |
2814 | RETURN (SCM_SUBRF (proc) (SCM_UNDEFINED, SCM_UNDEFINED)); | |
0717dfd8 | 2815 | case scm_tc7_smob: |
68b06924 | 2816 | if (!SCM_SMOB_APPLICABLE_P (proc)) |
0717dfd8 | 2817 | goto badfun; |
68b06924 | 2818 | RETURN (SCM_SMOB_APPLY_0 (proc)); |
0f2d19dd | 2819 | case scm_tc7_cclo: |
dff98306 | 2820 | arg1 = proc; |
0f2d19dd | 2821 | proc = SCM_CCLO_SUBR (proc); |
6dbd0af5 MD |
2822 | #ifdef DEVAL |
2823 | debug.info->a.proc = proc; | |
dff98306 | 2824 | debug.info->a.args = scm_list_1 (arg1); |
6dbd0af5 | 2825 | #endif |
0f2d19dd | 2826 | goto evap1; |
89efbff4 MD |
2827 | case scm_tc7_pws: |
2828 | proc = SCM_PROCEDURE (proc); | |
2829 | #ifdef DEVAL | |
2830 | debug.info->a.proc = proc; | |
2831 | #endif | |
002f1a5d MD |
2832 | if (!SCM_CLOSUREP (proc)) |
2833 | goto evap0; | |
2834 | if (scm_badformalsp (proc, 0)) | |
2835 | goto umwrongnumargs; | |
0f2d19dd | 2836 | case scm_tcs_closures: |
f9450cdb | 2837 | x = SCM_CLOSURE_BODY (proc); |
726d810a | 2838 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), SCM_EOL, SCM_ENV (proc)); |
f9450cdb | 2839 | goto nontoplevel_begin; |
904a077d | 2840 | case scm_tcs_struct: |
195847fa MD |
2841 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) |
2842 | { | |
2843 | x = SCM_ENTITY_PROCEDURE (proc); | |
dff98306 | 2844 | arg1 = SCM_EOL; |
195847fa MD |
2845 | goto type_dispatch; |
2846 | } | |
2847 | else if (!SCM_I_OPERATORP (proc)) | |
9b07e212 MD |
2848 | goto badfun; |
2849 | else | |
da7f71d7 | 2850 | { |
dff98306 | 2851 | arg1 = proc; |
195847fa MD |
2852 | proc = (SCM_I_ENTITYP (proc) |
2853 | ? SCM_ENTITY_PROCEDURE (proc) | |
2854 | : SCM_OPERATOR_PROCEDURE (proc)); | |
da7f71d7 | 2855 | #ifdef DEVAL |
195847fa | 2856 | debug.info->a.proc = proc; |
dff98306 | 2857 | debug.info->a.args = scm_list_1 (arg1); |
da7f71d7 | 2858 | #endif |
195847fa MD |
2859 | if (SCM_NIMP (proc)) |
2860 | goto evap1; | |
2861 | else | |
2862 | goto badfun; | |
da7f71d7 | 2863 | } |
0f2d19dd JB |
2864 | case scm_tc7_subr_1: |
2865 | case scm_tc7_subr_2: | |
2866 | case scm_tc7_subr_2o: | |
2867 | case scm_tc7_cxr: | |
2868 | case scm_tc7_subr_3: | |
2869 | case scm_tc7_lsubr_2: | |
2870 | umwrongnumargs: | |
2871 | unmemocar (x, env); | |
f5bf2977 | 2872 | scm_wrong_num_args (proc); |
0f2d19dd JB |
2873 | default: |
2874 | /* handle macros here */ | |
2875 | goto badfun; | |
2876 | } | |
6dbd0af5 | 2877 | } |
0f2d19dd JB |
2878 | |
2879 | /* must handle macros by here */ | |
2880 | x = SCM_CDR (x); | |
dff98306 DH |
2881 | if (SCM_CONSP (x)) |
2882 | arg1 = EVALCAR (x, env); | |
680ed4a8 | 2883 | else |
ab1f1094 | 2884 | scm_wrong_num_args (proc); |
6dbd0af5 | 2885 | #ifdef DEVAL |
dff98306 | 2886 | debug.info->a.args = scm_list_1 (arg1); |
6dbd0af5 | 2887 | #endif |
0f2d19dd | 2888 | x = SCM_CDR (x); |
42030fb2 DH |
2889 | { |
2890 | SCM arg2; | |
2891 | if (SCM_NULLP (x)) | |
2892 | { | |
2893 | ENTER_APPLY; | |
2894 | evap1: /* inputs: proc, arg1 */ | |
2895 | switch (SCM_TYP7 (proc)) | |
2896 | { /* have one argument in arg1 */ | |
2897 | case scm_tc7_subr_2o: | |
2898 | RETURN (SCM_SUBRF (proc) (arg1, SCM_UNDEFINED)); | |
2899 | case scm_tc7_subr_1: | |
2900 | case scm_tc7_subr_1o: | |
2901 | RETURN (SCM_SUBRF (proc) (arg1)); | |
2902 | case scm_tc7_cxr: | |
2903 | if (SCM_SUBRF (proc)) | |
2904 | { | |
2905 | if (SCM_INUMP (arg1)) | |
2906 | { | |
2907 | RETURN (scm_make_real (SCM_DSUBRF (proc) ((double) SCM_INUM (arg1)))); | |
2908 | } | |
2909 | else if (SCM_REALP (arg1)) | |
2910 | { | |
2911 | RETURN (scm_make_real (SCM_DSUBRF (proc) (SCM_REAL_VALUE (arg1)))); | |
2912 | } | |
0f2d19dd | 2913 | #ifdef SCM_BIGDIG |
42030fb2 DH |
2914 | else if (SCM_BIGP (arg1)) |
2915 | { | |
2916 | RETURN (scm_make_real (SCM_DSUBRF (proc) (scm_i_big2dbl (arg1)))); | |
2917 | } | |
2918 | #endif | |
2919 | SCM_WTA_DISPATCH_1 (*SCM_SUBR_GENERIC (proc), arg1, | |
2920 | SCM_ARG1, SCM_SYMBOL_CHARS (SCM_SNAME (proc))); | |
2921 | } | |
2922 | proc = SCM_SNAME (proc); | |
2923 | { | |
2924 | char *chrs = SCM_SYMBOL_CHARS (proc) + SCM_SYMBOL_LENGTH (proc) - 1; | |
2925 | while ('c' != *--chrs) | |
0f2d19dd | 2926 | { |
42030fb2 DH |
2927 | SCM_ASSERT (SCM_CONSP (arg1), |
2928 | arg1, SCM_ARG1, SCM_SYMBOL_CHARS (proc)); | |
2929 | arg1 = ('a' == *chrs) ? SCM_CAR (arg1) : SCM_CDR (arg1); | |
0f2d19dd | 2930 | } |
42030fb2 | 2931 | RETURN (arg1); |
0f2d19dd | 2932 | } |
42030fb2 DH |
2933 | case scm_tc7_rpsubr: |
2934 | RETURN (SCM_BOOL_T); | |
2935 | case scm_tc7_asubr: | |
2936 | RETURN (SCM_SUBRF (proc) (arg1, SCM_UNDEFINED)); | |
2937 | case scm_tc7_lsubr: | |
0f2d19dd | 2938 | #ifdef DEVAL |
42030fb2 | 2939 | RETURN (SCM_SUBRF (proc) (debug.info->a.args)); |
0f2d19dd | 2940 | #else |
42030fb2 | 2941 | RETURN (SCM_SUBRF (proc) (scm_list_1 (arg1))); |
0f2d19dd | 2942 | #endif |
42030fb2 DH |
2943 | case scm_tc7_smob: |
2944 | if (!SCM_SMOB_APPLICABLE_P (proc)) | |
2945 | goto badfun; | |
2946 | RETURN (SCM_SMOB_APPLY_1 (proc, arg1)); | |
2947 | case scm_tc7_cclo: | |
2948 | arg2 = arg1; | |
2949 | arg1 = proc; | |
2950 | proc = SCM_CCLO_SUBR (proc); | |
6dbd0af5 | 2951 | #ifdef DEVAL |
42030fb2 DH |
2952 | debug.info->a.args = scm_cons (arg1, debug.info->a.args); |
2953 | debug.info->a.proc = proc; | |
6dbd0af5 | 2954 | #endif |
42030fb2 DH |
2955 | goto evap2; |
2956 | case scm_tc7_pws: | |
2957 | proc = SCM_PROCEDURE (proc); | |
89efbff4 | 2958 | #ifdef DEVAL |
42030fb2 | 2959 | debug.info->a.proc = proc; |
89efbff4 | 2960 | #endif |
42030fb2 DH |
2961 | if (!SCM_CLOSUREP (proc)) |
2962 | goto evap1; | |
2963 | if (scm_badformalsp (proc, 1)) | |
2964 | goto umwrongnumargs; | |
2965 | case scm_tcs_closures: | |
2966 | /* clos1: */ | |
2967 | x = SCM_CLOSURE_BODY (proc); | |
0f2d19dd | 2968 | #ifdef DEVAL |
42030fb2 | 2969 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), debug.info->a.args, SCM_ENV (proc)); |
0f2d19dd | 2970 | #else |
42030fb2 | 2971 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), scm_list_1 (arg1), SCM_ENV (proc)); |
0f2d19dd | 2972 | #endif |
42030fb2 DH |
2973 | goto nontoplevel_begin; |
2974 | case scm_tcs_struct: | |
2975 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) | |
2976 | { | |
2977 | x = SCM_ENTITY_PROCEDURE (proc); | |
f3d2630a | 2978 | #ifdef DEVAL |
42030fb2 | 2979 | arg1 = debug.info->a.args; |
f3d2630a | 2980 | #else |
42030fb2 | 2981 | arg1 = scm_list_1 (arg1); |
f3d2630a | 2982 | #endif |
42030fb2 DH |
2983 | goto type_dispatch; |
2984 | } | |
2985 | else if (!SCM_I_OPERATORP (proc)) | |
2986 | goto badfun; | |
2987 | else | |
2988 | { | |
2989 | arg2 = arg1; | |
2990 | arg1 = proc; | |
2991 | proc = (SCM_I_ENTITYP (proc) | |
2992 | ? SCM_ENTITY_PROCEDURE (proc) | |
2993 | : SCM_OPERATOR_PROCEDURE (proc)); | |
0c32d76c | 2994 | #ifdef DEVAL |
42030fb2 DH |
2995 | debug.info->a.args = scm_cons (arg1, debug.info->a.args); |
2996 | debug.info->a.proc = proc; | |
0c32d76c | 2997 | #endif |
42030fb2 DH |
2998 | if (SCM_NIMP (proc)) |
2999 | goto evap2; | |
3000 | else | |
3001 | goto badfun; | |
3002 | } | |
3003 | case scm_tc7_subr_2: | |
3004 | case scm_tc7_subr_0: | |
3005 | case scm_tc7_subr_3: | |
3006 | case scm_tc7_lsubr_2: | |
ab1f1094 | 3007 | scm_wrong_num_args (proc); |
42030fb2 DH |
3008 | default: |
3009 | goto badfun; | |
3010 | } | |
3011 | } | |
42030fb2 DH |
3012 | if (SCM_CONSP (x)) |
3013 | arg2 = EVALCAR (x, env); | |
3014 | else | |
ab1f1094 | 3015 | scm_wrong_num_args (proc); |
bd987b8e | 3016 | |
42030fb2 | 3017 | { /* have two or more arguments */ |
6dbd0af5 | 3018 | #ifdef DEVAL |
42030fb2 | 3019 | debug.info->a.args = scm_list_2 (arg1, arg2); |
6dbd0af5 | 3020 | #endif |
42030fb2 DH |
3021 | x = SCM_CDR (x); |
3022 | if (SCM_NULLP (x)) { | |
3023 | ENTER_APPLY; | |
3024 | evap2: | |
3025 | switch (SCM_TYP7 (proc)) | |
3026 | { /* have two arguments */ | |
3027 | case scm_tc7_subr_2: | |
3028 | case scm_tc7_subr_2o: | |
3029 | RETURN (SCM_SUBRF (proc) (arg1, arg2)); | |
3030 | case scm_tc7_lsubr: | |
0f2d19dd | 3031 | #ifdef DEVAL |
42030fb2 | 3032 | RETURN (SCM_SUBRF (proc) (debug.info->a.args)); |
6dbd0af5 | 3033 | #else |
42030fb2 DH |
3034 | RETURN (SCM_SUBRF (proc) (scm_list_2 (arg1, arg2))); |
3035 | #endif | |
3036 | case scm_tc7_lsubr_2: | |
3037 | RETURN (SCM_SUBRF (proc) (arg1, arg2, SCM_EOL)); | |
3038 | case scm_tc7_rpsubr: | |
3039 | case scm_tc7_asubr: | |
3040 | RETURN (SCM_SUBRF (proc) (arg1, arg2)); | |
3041 | case scm_tc7_smob: | |
3042 | if (!SCM_SMOB_APPLICABLE_P (proc)) | |
3043 | goto badfun; | |
3044 | RETURN (SCM_SMOB_APPLY_2 (proc, arg1, arg2)); | |
3045 | cclon: | |
3046 | case scm_tc7_cclo: | |
0f2d19dd | 3047 | #ifdef DEVAL |
42030fb2 DH |
3048 | RETURN (SCM_APPLY (SCM_CCLO_SUBR (proc), |
3049 | scm_cons (proc, debug.info->a.args), | |
3050 | SCM_EOL)); | |
0f2d19dd | 3051 | #else |
42030fb2 DH |
3052 | RETURN (SCM_APPLY (SCM_CCLO_SUBR (proc), |
3053 | scm_cons2 (proc, arg1, | |
3054 | scm_cons (arg2, | |
3055 | scm_eval_args (x, | |
3056 | env, | |
3057 | proc))), | |
3058 | SCM_EOL)); | |
3059 | #endif | |
3060 | case scm_tcs_struct: | |
3061 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) | |
3062 | { | |
3063 | x = SCM_ENTITY_PROCEDURE (proc); | |
3064 | #ifdef DEVAL | |
3065 | arg1 = debug.info->a.args; | |
3066 | #else | |
3067 | arg1 = scm_list_2 (arg1, arg2); | |
6dbd0af5 | 3068 | #endif |
42030fb2 DH |
3069 | goto type_dispatch; |
3070 | } | |
3071 | else if (!SCM_I_OPERATORP (proc)) | |
3072 | goto badfun; | |
3073 | else | |
3074 | { | |
3075 | operatorn: | |
f3d2630a | 3076 | #ifdef DEVAL |
42030fb2 DH |
3077 | RETURN (SCM_APPLY (SCM_I_ENTITYP (proc) |
3078 | ? SCM_ENTITY_PROCEDURE (proc) | |
3079 | : SCM_OPERATOR_PROCEDURE (proc), | |
3080 | scm_cons (proc, debug.info->a.args), | |
3081 | SCM_EOL)); | |
f3d2630a | 3082 | #else |
42030fb2 DH |
3083 | RETURN (SCM_APPLY (SCM_I_ENTITYP (proc) |
3084 | ? SCM_ENTITY_PROCEDURE (proc) | |
3085 | : SCM_OPERATOR_PROCEDURE (proc), | |
3086 | scm_cons2 (proc, arg1, | |
3087 | scm_cons (arg2, | |
3088 | scm_eval_args (x, | |
3089 | env, | |
3090 | proc))), | |
3091 | SCM_EOL)); | |
f3d2630a | 3092 | #endif |
42030fb2 DH |
3093 | } |
3094 | case scm_tc7_subr_0: | |
3095 | case scm_tc7_cxr: | |
3096 | case scm_tc7_subr_1o: | |
3097 | case scm_tc7_subr_1: | |
3098 | case scm_tc7_subr_3: | |
ab1f1094 | 3099 | scm_wrong_num_args (proc); |
42030fb2 | 3100 | default: |
9b07e212 | 3101 | goto badfun; |
42030fb2 DH |
3102 | case scm_tc7_pws: |
3103 | proc = SCM_PROCEDURE (proc); | |
3104 | #ifdef DEVAL | |
3105 | debug.info->a.proc = proc; | |
3106 | #endif | |
3107 | if (!SCM_CLOSUREP (proc)) | |
3108 | goto evap2; | |
3109 | if (scm_badformalsp (proc, 2)) | |
3110 | goto umwrongnumargs; | |
3111 | case scm_tcs_closures: | |
3112 | /* clos2: */ | |
0c32d76c | 3113 | #ifdef DEVAL |
42030fb2 DH |
3114 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), |
3115 | debug.info->a.args, | |
3116 | SCM_ENV (proc)); | |
195847fa | 3117 | #else |
42030fb2 DH |
3118 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), |
3119 | scm_list_2 (arg1, arg2), SCM_ENV (proc)); | |
195847fa | 3120 | #endif |
42030fb2 DH |
3121 | x = SCM_CLOSURE_BODY (proc); |
3122 | goto nontoplevel_begin; | |
3123 | } | |
3124 | } | |
42030fb2 | 3125 | if (!SCM_CONSP (x)) |
ab1f1094 | 3126 | scm_wrong_num_args (proc); |
42030fb2 DH |
3127 | #ifdef DEVAL |
3128 | debug.info->a.args = scm_cons2 (arg1, arg2, | |
3129 | deval_args (x, env, proc, | |
3130 | SCM_CDRLOC (SCM_CDR (debug.info->a.args)))); | |
3131 | #endif | |
3132 | ENTER_APPLY; | |
3133 | evap3: | |
3134 | switch (SCM_TYP7 (proc)) | |
3135 | { /* have 3 or more arguments */ | |
3136 | #ifdef DEVAL | |
6dbd0af5 | 3137 | case scm_tc7_subr_3: |
ab1f1094 DH |
3138 | if (!SCM_NULLP (SCM_CDR (x))) |
3139 | scm_wrong_num_args (proc); | |
3140 | else | |
3141 | RETURN (SCM_SUBRF (proc) (arg1, arg2, | |
3142 | SCM_CADDR (debug.info->a.args))); | |
42030fb2 DH |
3143 | case scm_tc7_asubr: |
3144 | arg1 = SCM_SUBRF(proc)(arg1, arg2); | |
3145 | arg2 = SCM_CDDR (debug.info->a.args); | |
3146 | do | |
3147 | { | |
3148 | arg1 = SCM_SUBRF(proc)(arg1, SCM_CAR (arg2)); | |
3149 | arg2 = SCM_CDR (arg2); | |
3150 | } | |
3151 | while (SCM_NIMP (arg2)); | |
3152 | RETURN (arg1); | |
3153 | case scm_tc7_rpsubr: | |
3154 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg1, arg2))) | |
3155 | RETURN (SCM_BOOL_F); | |
3156 | arg1 = SCM_CDDR (debug.info->a.args); | |
3157 | do | |
3158 | { | |
3159 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg2, SCM_CAR (arg1)))) | |
3160 | RETURN (SCM_BOOL_F); | |
3161 | arg2 = SCM_CAR (arg1); | |
3162 | arg1 = SCM_CDR (arg1); | |
3163 | } | |
3164 | while (SCM_NIMP (arg1)); | |
3165 | RETURN (SCM_BOOL_T); | |
3166 | case scm_tc7_lsubr_2: | |
3167 | RETURN (SCM_SUBRF (proc) (arg1, arg2, | |
3168 | SCM_CDDR (debug.info->a.args))); | |
3169 | case scm_tc7_lsubr: | |
3170 | RETURN (SCM_SUBRF (proc) (debug.info->a.args)); | |
3171 | case scm_tc7_smob: | |
3172 | if (!SCM_SMOB_APPLICABLE_P (proc)) | |
3173 | goto badfun; | |
3174 | RETURN (SCM_SMOB_APPLY_3 (proc, arg1, arg2, | |
3175 | SCM_CDDR (debug.info->a.args))); | |
3176 | case scm_tc7_cclo: | |
3177 | goto cclon; | |
002f1a5d MD |
3178 | case scm_tc7_pws: |
3179 | proc = SCM_PROCEDURE (proc); | |
002f1a5d | 3180 | debug.info->a.proc = proc; |
002f1a5d | 3181 | if (!SCM_CLOSUREP (proc)) |
42030fb2 DH |
3182 | goto evap3; |
3183 | if (scm_badargsp (SCM_CLOSURE_FORMALS (proc), debug.info->a.args)) | |
002f1a5d | 3184 | goto umwrongnumargs; |
6dbd0af5 | 3185 | case scm_tcs_closures: |
42030fb2 | 3186 | SCM_SET_ARGSREADY (debug); |
726d810a | 3187 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), |
da7f71d7 MD |
3188 | debug.info->a.args, |
3189 | SCM_ENV (proc)); | |
f9450cdb DH |
3190 | x = SCM_CLOSURE_BODY (proc); |
3191 | goto nontoplevel_begin; | |
6dbd0af5 | 3192 | #else /* DEVAL */ |
42030fb2 | 3193 | case scm_tc7_subr_3: |
ab1f1094 DH |
3194 | if (!SCM_NULLP (SCM_CDR (x))) |
3195 | scm_wrong_num_args (proc); | |
3196 | else | |
3197 | RETURN (SCM_SUBRF (proc) (arg1, arg2, EVALCAR (x, env))); | |
42030fb2 DH |
3198 | case scm_tc7_asubr: |
3199 | arg1 = SCM_SUBRF (proc) (arg1, arg2); | |
3200 | do | |
3201 | { | |
3202 | arg1 = SCM_SUBRF(proc)(arg1, EVALCAR(x, env)); | |
3203 | x = SCM_CDR(x); | |
3204 | } | |
3205 | while (SCM_NIMP (x)); | |
3206 | RETURN (arg1); | |
3207 | case scm_tc7_rpsubr: | |
3208 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg1, arg2))) | |
3209 | RETURN (SCM_BOOL_F); | |
3210 | do | |
3211 | { | |
3212 | arg1 = EVALCAR (x, env); | |
3213 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg2, arg1))) | |
3214 | RETURN (SCM_BOOL_F); | |
3215 | arg2 = arg1; | |
3216 | x = SCM_CDR (x); | |
3217 | } | |
3218 | while (SCM_NIMP (x)); | |
3219 | RETURN (SCM_BOOL_T); | |
3220 | case scm_tc7_lsubr_2: | |
3221 | RETURN (SCM_SUBRF (proc) (arg1, arg2, scm_eval_args (x, env, proc))); | |
3222 | case scm_tc7_lsubr: | |
3223 | RETURN (SCM_SUBRF (proc) (scm_cons2 (arg1, | |
3224 | arg2, | |
3225 | scm_eval_args (x, env, proc)))); | |
3226 | case scm_tc7_smob: | |
3227 | if (!SCM_SMOB_APPLICABLE_P (proc)) | |
3228 | goto badfun; | |
3229 | RETURN (SCM_SMOB_APPLY_3 (proc, arg1, arg2, | |
3230 | scm_eval_args (x, env, proc))); | |
3231 | case scm_tc7_cclo: | |
3232 | goto cclon; | |
3233 | case scm_tc7_pws: | |
3234 | proc = SCM_PROCEDURE (proc); | |
3235 | if (!SCM_CLOSUREP (proc)) | |
3236 | goto evap3; | |
da7f71d7 | 3237 | { |
42030fb2 DH |
3238 | SCM formals = SCM_CLOSURE_FORMALS (proc); |
3239 | if (SCM_NULLP (formals) | |
3240 | || (SCM_CONSP (formals) | |
3241 | && (SCM_NULLP (SCM_CDR (formals)) | |
3242 | || (SCM_CONSP (SCM_CDR (formals)) | |
3243 | && scm_badargsp (SCM_CDDR (formals), x))))) | |
3244 | goto umwrongnumargs; | |
da7f71d7 | 3245 | } |
42030fb2 | 3246 | case scm_tcs_closures: |
6dbd0af5 | 3247 | #ifdef DEVAL |
42030fb2 | 3248 | SCM_SET_ARGSREADY (debug); |
6dbd0af5 | 3249 | #endif |
42030fb2 DH |
3250 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), |
3251 | scm_cons2 (arg1, | |
3252 | arg2, | |
3253 | scm_eval_args (x, env, proc)), | |
3254 | SCM_ENV (proc)); | |
3255 | x = SCM_CLOSURE_BODY (proc); | |
3256 | goto nontoplevel_begin; | |
0f2d19dd | 3257 | #endif /* DEVAL */ |
42030fb2 DH |
3258 | case scm_tcs_struct: |
3259 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) | |
3260 | { | |
f3d2630a | 3261 | #ifdef DEVAL |
42030fb2 | 3262 | arg1 = debug.info->a.args; |
f3d2630a | 3263 | #else |
42030fb2 | 3264 | arg1 = scm_cons2 (arg1, arg2, scm_eval_args (x, env, proc)); |
f3d2630a | 3265 | #endif |
42030fb2 DH |
3266 | x = SCM_ENTITY_PROCEDURE (proc); |
3267 | goto type_dispatch; | |
3268 | } | |
3269 | else if (!SCM_I_OPERATORP (proc)) | |
3270 | goto badfun; | |
3271 | else | |
3272 | goto operatorn; | |
3273 | case scm_tc7_subr_2: | |
3274 | case scm_tc7_subr_1o: | |
3275 | case scm_tc7_subr_2o: | |
3276 | case scm_tc7_subr_0: | |
3277 | case scm_tc7_cxr: | |
3278 | case scm_tc7_subr_1: | |
ab1f1094 | 3279 | scm_wrong_num_args (proc); |
42030fb2 | 3280 | default: |
9b07e212 | 3281 | goto badfun; |
42030fb2 DH |
3282 | } |
3283 | } | |
0f2d19dd JB |
3284 | } |
3285 | #ifdef DEVAL | |
6dbd0af5 | 3286 | exit: |
5132eef0 | 3287 | if (scm_check_exit_p && SCM_TRAPS_P) |
b7ff98dd | 3288 | if (SCM_EXIT_FRAME_P || (SCM_TRACE_P && SCM_TRACED_FRAME_P (debug))) |
6dbd0af5 | 3289 | { |
b7ff98dd MD |
3290 | SCM_CLEAR_TRACED_FRAME (debug); |
3291 | if (SCM_CHEAPTRAPS_P) | |
dff98306 | 3292 | arg1 = scm_make_debugobj (&debug); |
6dbd0af5 MD |
3293 | else |
3294 | { | |
5f144b10 GH |
3295 | int first; |
3296 | SCM val = scm_make_continuation (&first); | |
e050d4f8 | 3297 | |
5f144b10 | 3298 | if (first) |
dff98306 | 3299 | arg1 = val; |
5f144b10 | 3300 | else |
6dbd0af5 | 3301 | { |
5f144b10 | 3302 | proc = val; |
6dbd0af5 MD |
3303 | goto ret; |
3304 | } | |
3305 | } | |
d95c0b76 | 3306 | SCM_TRAPS_P = 0; |
dff98306 | 3307 | scm_call_3 (SCM_EXIT_FRAME_HDLR, scm_sym_exit_frame, arg1, proc); |
d95c0b76 | 3308 | SCM_TRAPS_P = 1; |
6dbd0af5 MD |
3309 | } |
3310 | ret: | |
1646d37b | 3311 | scm_last_debug_frame = debug.prev; |
0f2d19dd JB |
3312 | return proc; |
3313 | #endif | |
3314 | } | |
3315 | ||
6dbd0af5 MD |
3316 | |
3317 | /* SECTION: This code is compiled once. | |
3318 | */ | |
3319 | ||
0f2d19dd JB |
3320 | #ifndef DEVAL |
3321 | ||
fdc28395 KN |
3322 | \f |
3323 | /* Simple procedure calls | |
3324 | */ | |
3325 | ||
3326 | SCM | |
3327 | scm_call_0 (SCM proc) | |
3328 | { | |
3329 | return scm_apply (proc, SCM_EOL, SCM_EOL); | |
3330 | } | |
3331 | ||
3332 | SCM | |
3333 | scm_call_1 (SCM proc, SCM arg1) | |
3334 | { | |
3335 | return scm_apply (proc, arg1, scm_listofnull); | |
3336 | } | |
3337 | ||
3338 | SCM | |
3339 | scm_call_2 (SCM proc, SCM arg1, SCM arg2) | |
3340 | { | |
3341 | return scm_apply (proc, arg1, scm_cons (arg2, scm_listofnull)); | |
3342 | } | |
3343 | ||
3344 | SCM | |
3345 | scm_call_3 (SCM proc, SCM arg1, SCM arg2, SCM arg3) | |
3346 | { | |
3347 | return scm_apply (proc, arg1, scm_cons2 (arg2, arg3, scm_listofnull)); | |
3348 | } | |
3349 | ||
d95c0b76 NJ |
3350 | SCM |
3351 | scm_call_4 (SCM proc, SCM arg1, SCM arg2, SCM arg3, SCM arg4) | |
3352 | { | |
3353 | return scm_apply (proc, arg1, scm_cons2 (arg2, arg3, | |
3354 | scm_cons (arg4, scm_listofnull))); | |
3355 | } | |
3356 | ||
fdc28395 KN |
3357 | /* Simple procedure applies |
3358 | */ | |
3359 | ||
3360 | SCM | |
3361 | scm_apply_0 (SCM proc, SCM args) | |
3362 | { | |
3363 | return scm_apply (proc, args, SCM_EOL); | |
3364 | } | |
3365 | ||
3366 | SCM | |
3367 | scm_apply_1 (SCM proc, SCM arg1, SCM args) | |
3368 | { | |
3369 | return scm_apply (proc, scm_cons (arg1, args), SCM_EOL); | |
3370 | } | |
3371 | ||
3372 | SCM | |
3373 | scm_apply_2 (SCM proc, SCM arg1, SCM arg2, SCM args) | |
3374 | { | |
3375 | return scm_apply (proc, scm_cons2 (arg1, arg2, args), SCM_EOL); | |
3376 | } | |
3377 | ||
3378 | SCM | |
3379 | scm_apply_3 (SCM proc, SCM arg1, SCM arg2, SCM arg3, SCM args) | |
3380 | { | |
3381 | return scm_apply (proc, scm_cons (arg1, scm_cons2 (arg2, arg3, args)), | |
3382 | SCM_EOL); | |
3383 | } | |
3384 | ||
82a2622a | 3385 | /* This code processes the arguments to apply: |
b145c172 JB |
3386 | |
3387 | (apply PROC ARG1 ... ARGS) | |
3388 | ||
82a2622a JB |
3389 | Given a list (ARG1 ... ARGS), this function conses the ARG1 |
3390 | ... arguments onto the front of ARGS, and returns the resulting | |
3391 | list. Note that ARGS is a list; thus, the argument to this | |
3392 | function is a list whose last element is a list. | |
3393 | ||
3394 | Apply calls this function, and applies PROC to the elements of the | |
b145c172 JB |
3395 | result. apply:nconc2last takes care of building the list of |
3396 | arguments, given (ARG1 ... ARGS). | |
3397 | ||
82a2622a JB |
3398 | Rather than do new consing, apply:nconc2last destroys its argument. |
3399 | On that topic, this code came into my care with the following | |
3400 | beautifully cryptic comment on that topic: "This will only screw | |
3401 | you if you do (scm_apply scm_apply '( ... ))" If you know what | |
3402 | they're referring to, send me a patch to this comment. */ | |
b145c172 | 3403 | |
3b3b36dd | 3404 | SCM_DEFINE (scm_nconc2last, "apply:nconc2last", 1, 0, 0, |
b3f26b14 MG |
3405 | (SCM lst), |
3406 | "Given a list (@var{arg1} @dots{} @var{args}), this function\n" | |
3407 | "conses the @var{arg1} @dots{} arguments onto the front of\n" | |
3408 | "@var{args}, and returns the resulting list. Note that\n" | |
3409 | "@var{args} is a list; thus, the argument to this function is\n" | |
3410 | "a list whose last element is a list.\n" | |
3411 | "Note: Rather than do new consing, @code{apply:nconc2last}\n" | |
3412 | "destroys its argument, so use with care.") | |
1bbd0b84 | 3413 | #define FUNC_NAME s_scm_nconc2last |
0f2d19dd JB |
3414 | { |
3415 | SCM *lloc; | |
34d19ef6 | 3416 | SCM_VALIDATE_NONEMPTYLIST (1, lst); |
0f2d19dd | 3417 | lloc = &lst; |
c96d76b8 NJ |
3418 | while (!SCM_NULLP (SCM_CDR (*lloc))) /* Perhaps should be |
3419 | SCM_NULL_OR_NIL_P, but not | |
3420 | needed in 99.99% of cases, | |
3421 | and it could seriously hurt | |
3422 | performance. - Neil */ | |
a23afe53 | 3423 | lloc = SCM_CDRLOC (*lloc); |
1bbd0b84 | 3424 | SCM_ASSERT (scm_ilength (SCM_CAR (*lloc)) >= 0, lst, SCM_ARG1, FUNC_NAME); |
0f2d19dd JB |
3425 | *lloc = SCM_CAR (*lloc); |
3426 | return lst; | |
3427 | } | |
1bbd0b84 | 3428 | #undef FUNC_NAME |
0f2d19dd JB |
3429 | |
3430 | #endif /* !DEVAL */ | |
3431 | ||
6dbd0af5 MD |
3432 | |
3433 | /* SECTION: When DEVAL is defined this code yields scm_dapply. | |
3434 | * It is compiled twice. | |
3435 | */ | |
3436 | ||
0f2d19dd | 3437 | #if 0 |
0f2d19dd | 3438 | SCM |
6e8d25a6 | 3439 | scm_apply (SCM proc, SCM arg1, SCM args) |
0f2d19dd JB |
3440 | {} |
3441 | #endif | |
3442 | ||
3443 | #if 0 | |
0f2d19dd | 3444 | SCM |
6e8d25a6 GB |
3445 | scm_dapply (SCM proc, SCM arg1, SCM args) |
3446 | { /* empty */ } | |
0f2d19dd JB |
3447 | #endif |
3448 | ||
1cc91f1b | 3449 | |
82a2622a JB |
3450 | /* Apply a function to a list of arguments. |
3451 | ||
3452 | This function is exported to the Scheme level as taking two | |
3453 | required arguments and a tail argument, as if it were: | |
3454 | (lambda (proc arg1 . args) ...) | |
3455 | Thus, if you just have a list of arguments to pass to a procedure, | |
3456 | pass the list as ARG1, and '() for ARGS. If you have some fixed | |
3457 | args, pass the first as ARG1, then cons any remaining fixed args | |
3458 | onto the front of your argument list, and pass that as ARGS. */ | |
3459 | ||
0f2d19dd | 3460 | SCM |
1bbd0b84 | 3461 | SCM_APPLY (SCM proc, SCM arg1, SCM args) |
0f2d19dd JB |
3462 | { |
3463 | #ifdef DEBUG_EXTENSIONS | |
3464 | #ifdef DEVAL | |
92c2555f MV |
3465 | scm_t_debug_frame debug; |
3466 | scm_t_debug_info debug_vect_body; | |
1646d37b | 3467 | debug.prev = scm_last_debug_frame; |
b7ff98dd | 3468 | debug.status = SCM_APPLYFRAME; |
c0ab1b8d | 3469 | debug.vect = &debug_vect_body; |
6dbd0af5 MD |
3470 | debug.vect[0].a.proc = proc; |
3471 | debug.vect[0].a.args = SCM_EOL; | |
1646d37b | 3472 | scm_last_debug_frame = &debug; |
0f2d19dd | 3473 | #else |
b7ff98dd | 3474 | if (SCM_DEBUGGINGP) |
0f2d19dd JB |
3475 | return scm_dapply (proc, arg1, args); |
3476 | #endif | |
3477 | #endif | |
3478 | ||
3479 | SCM_ASRTGO (SCM_NIMP (proc), badproc); | |
82a2622a JB |
3480 | |
3481 | /* If ARGS is the empty list, then we're calling apply with only two | |
3482 | arguments --- ARG1 is the list of arguments for PROC. Whatever | |
3483 | the case, futz with things so that ARG1 is the first argument to | |
3484 | give to PROC (or SCM_UNDEFINED if no args), and ARGS contains the | |
30000774 JB |
3485 | rest. |
3486 | ||
3487 | Setting the debug apply frame args this way is pretty messy. | |
3488 | Perhaps we should store arg1 and args directly in the frame as | |
3489 | received, and let scm_frame_arguments unpack them, because that's | |
3490 | a relatively rare operation. This works for now; if the Guile | |
3491 | developer archives are still around, see Mikael's post of | |
3492 | 11-Apr-97. */ | |
0f2d19dd JB |
3493 | if (SCM_NULLP (args)) |
3494 | { | |
3495 | if (SCM_NULLP (arg1)) | |
30000774 JB |
3496 | { |
3497 | arg1 = SCM_UNDEFINED; | |
3498 | #ifdef DEVAL | |
3499 | debug.vect[0].a.args = SCM_EOL; | |
3500 | #endif | |
3501 | } | |
0f2d19dd JB |
3502 | else |
3503 | { | |
30000774 JB |
3504 | #ifdef DEVAL |
3505 | debug.vect[0].a.args = arg1; | |
3506 | #endif | |
0f2d19dd JB |
3507 | args = SCM_CDR (arg1); |
3508 | arg1 = SCM_CAR (arg1); | |
3509 | } | |
3510 | } | |
3511 | else | |
3512 | { | |
0f2d19dd | 3513 | args = scm_nconc2last (args); |
30000774 JB |
3514 | #ifdef DEVAL |
3515 | debug.vect[0].a.args = scm_cons (arg1, args); | |
3516 | #endif | |
0f2d19dd | 3517 | } |
0f2d19dd | 3518 | #ifdef DEVAL |
b6d75948 | 3519 | if (SCM_ENTER_FRAME_P && SCM_TRAPS_P) |
6dbd0af5 MD |
3520 | { |
3521 | SCM tmp; | |
b7ff98dd | 3522 | if (SCM_CHEAPTRAPS_P) |
c0ab1b8d | 3523 | tmp = scm_make_debugobj (&debug); |
6dbd0af5 MD |
3524 | else |
3525 | { | |
5f144b10 GH |
3526 | int first; |
3527 | ||
3528 | tmp = scm_make_continuation (&first); | |
3529 | if (!first) | |
6dbd0af5 MD |
3530 | goto entap; |
3531 | } | |
d95c0b76 NJ |
3532 | SCM_TRAPS_P = 0; |
3533 | scm_call_2 (SCM_ENTER_FRAME_HDLR, scm_sym_enter_frame, tmp); | |
3534 | SCM_TRAPS_P = 1; | |
6dbd0af5 MD |
3535 | } |
3536 | entap: | |
3537 | ENTER_APPLY; | |
3538 | #endif | |
6dbd0af5 | 3539 | tail: |
0f2d19dd JB |
3540 | switch (SCM_TYP7 (proc)) |
3541 | { | |
3542 | case scm_tc7_subr_2o: | |
3543 | args = SCM_NULLP (args) ? SCM_UNDEFINED : SCM_CAR (args); | |
ddea3325 | 3544 | RETURN (SCM_SUBRF (proc) (arg1, args)); |
0f2d19dd | 3545 | case scm_tc7_subr_2: |
ab1f1094 DH |
3546 | if (SCM_NULLP (args) || !SCM_NULLP (SCM_CDR (args))) |
3547 | scm_wrong_num_args (proc); | |
0f2d19dd | 3548 | args = SCM_CAR (args); |
ddea3325 | 3549 | RETURN (SCM_SUBRF (proc) (arg1, args)); |
0f2d19dd | 3550 | case scm_tc7_subr_0: |
ab1f1094 DH |
3551 | if (!SCM_UNBNDP (arg1)) |
3552 | scm_wrong_num_args (proc); | |
3553 | else | |
3554 | RETURN (SCM_SUBRF (proc) ()); | |
0f2d19dd | 3555 | case scm_tc7_subr_1: |
ab1f1094 DH |
3556 | if (SCM_UNBNDP (arg1)) |
3557 | scm_wrong_num_args (proc); | |
0f2d19dd | 3558 | case scm_tc7_subr_1o: |
ab1f1094 DH |
3559 | if (!SCM_NULLP (args)) |
3560 | scm_wrong_num_args (proc); | |
3561 | else | |
3562 | RETURN (SCM_SUBRF (proc) (arg1)); | |
0f2d19dd | 3563 | case scm_tc7_cxr: |
ab1f1094 DH |
3564 | if (SCM_UNBNDP (arg1) || !SCM_NULLP (args)) |
3565 | scm_wrong_num_args (proc); | |
0f2d19dd JB |
3566 | if (SCM_SUBRF (proc)) |
3567 | { | |
6dbd0af5 MD |
3568 | if (SCM_INUMP (arg1)) |
3569 | { | |
f8de44c1 | 3570 | RETURN (scm_make_real (SCM_DSUBRF (proc) ((double) SCM_INUM (arg1)))); |
6dbd0af5 | 3571 | } |
01f11e02 | 3572 | else if (SCM_REALP (arg1)) |
6dbd0af5 | 3573 | { |
eb42e2f0 | 3574 | RETURN (scm_make_real (SCM_DSUBRF (proc) (SCM_REAL_VALUE (arg1)))); |
6dbd0af5 | 3575 | } |
0f2d19dd | 3576 | #ifdef SCM_BIGDIG |
01f11e02 | 3577 | else if (SCM_BIGP (arg1)) |
ddea3325 | 3578 | RETURN (scm_make_real (SCM_DSUBRF (proc) (scm_i_big2dbl (arg1)))); |
0f2d19dd | 3579 | #endif |
9de33deb | 3580 | SCM_WTA_DISPATCH_1 (*SCM_SUBR_GENERIC (proc), arg1, |
3db4adfc | 3581 | SCM_ARG1, SCM_SYMBOL_CHARS (SCM_SNAME (proc))); |
0f2d19dd | 3582 | } |
3201d763 | 3583 | proc = SCM_SNAME (proc); |
0f2d19dd | 3584 | { |
b5c2579a | 3585 | char *chrs = SCM_SYMBOL_CHARS (proc) + SCM_SYMBOL_LENGTH (proc) - 1; |
0f2d19dd JB |
3586 | while ('c' != *--chrs) |
3587 | { | |
0c95b57d | 3588 | SCM_ASSERT (SCM_CONSP (arg1), |
3db4adfc | 3589 | arg1, SCM_ARG1, SCM_SYMBOL_CHARS (proc)); |
0f2d19dd JB |
3590 | arg1 = ('a' == *chrs) ? SCM_CAR (arg1) : SCM_CDR (arg1); |
3591 | } | |
ddea3325 | 3592 | RETURN (arg1); |
0f2d19dd JB |
3593 | } |
3594 | case scm_tc7_subr_3: | |
ab1f1094 DH |
3595 | if (SCM_NULLP (args) |
3596 | || SCM_NULLP (SCM_CDR (args)) | |
3597 | || !SCM_NULLP (SCM_CDDR (args))) | |
3598 | scm_wrong_num_args (proc); | |
3599 | else | |
3600 | RETURN (SCM_SUBRF (proc) (arg1, SCM_CAR (args), SCM_CADR (args))); | |
0f2d19dd JB |
3601 | case scm_tc7_lsubr: |
3602 | #ifdef DEVAL | |
ddea3325 | 3603 | RETURN (SCM_SUBRF (proc) (SCM_UNBNDP (arg1) ? SCM_EOL : debug.vect[0].a.args)); |
0f2d19dd | 3604 | #else |
ddea3325 | 3605 | RETURN (SCM_SUBRF (proc) (SCM_UNBNDP (arg1) ? SCM_EOL : scm_cons (arg1, args))); |
0f2d19dd JB |
3606 | #endif |
3607 | case scm_tc7_lsubr_2: | |
ab1f1094 DH |
3608 | if (!SCM_CONSP (args)) |
3609 | scm_wrong_num_args (proc); | |
3610 | else | |
3611 | RETURN (SCM_SUBRF (proc) (arg1, SCM_CAR (args), SCM_CDR (args))); | |
0f2d19dd JB |
3612 | case scm_tc7_asubr: |
3613 | if (SCM_NULLP (args)) | |
ddea3325 | 3614 | RETURN (SCM_SUBRF (proc) (arg1, SCM_UNDEFINED)); |
0f2d19dd JB |
3615 | while (SCM_NIMP (args)) |
3616 | { | |
3617 | SCM_ASSERT (SCM_CONSP (args), args, SCM_ARG2, "apply"); | |
3618 | arg1 = SCM_SUBRF (proc) (arg1, SCM_CAR (args)); | |
3619 | args = SCM_CDR (args); | |
3620 | } | |
3621 | RETURN (arg1); | |
3622 | case scm_tc7_rpsubr: | |
3623 | if (SCM_NULLP (args)) | |
3624 | RETURN (SCM_BOOL_T); | |
3625 | while (SCM_NIMP (args)) | |
3626 | { | |
3627 | SCM_ASSERT (SCM_CONSP (args), args, SCM_ARG2, "apply"); | |
3628 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg1, SCM_CAR (args)))) | |
3629 | RETURN (SCM_BOOL_F); | |
3630 | arg1 = SCM_CAR (args); | |
3631 | args = SCM_CDR (args); | |
3632 | } | |
3633 | RETURN (SCM_BOOL_T); | |
3634 | case scm_tcs_closures: | |
3635 | #ifdef DEVAL | |
6dbd0af5 | 3636 | arg1 = (SCM_UNBNDP (arg1) ? SCM_EOL : debug.vect[0].a.args); |
0f2d19dd JB |
3637 | #else |
3638 | arg1 = (SCM_UNBNDP (arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
3639 | #endif | |
726d810a | 3640 | if (scm_badargsp (SCM_CLOSURE_FORMALS (proc), arg1)) |
ab1f1094 | 3641 | scm_wrong_num_args (proc); |
1609038c MD |
3642 | |
3643 | /* Copy argument list */ | |
3644 | if (SCM_IMP (arg1)) | |
3645 | args = arg1; | |
3646 | else | |
3647 | { | |
3648 | SCM tl = args = scm_cons (SCM_CAR (arg1), SCM_UNSPECIFIED); | |
cabe682c | 3649 | while (arg1 = SCM_CDR (arg1), SCM_CONSP (arg1)) |
1609038c MD |
3650 | { |
3651 | SCM_SETCDR (tl, scm_cons (SCM_CAR (arg1), | |
3652 | SCM_UNSPECIFIED)); | |
3653 | tl = SCM_CDR (tl); | |
3654 | } | |
3655 | SCM_SETCDR (tl, arg1); | |
3656 | } | |
3657 | ||
726d810a | 3658 | args = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), args, SCM_ENV (proc)); |
f9450cdb | 3659 | proc = SCM_CLOSURE_BODY (proc); |
e791c18f MD |
3660 | again: |
3661 | arg1 = proc; | |
01f11e02 | 3662 | while (!SCM_NULLP (arg1 = SCM_CDR (arg1))) |
2ddb0920 MD |
3663 | { |
3664 | if (SCM_IMP (SCM_CAR (proc))) | |
3665 | { | |
3666 | if (SCM_ISYMP (SCM_CAR (proc))) | |
3667 | { | |
3668 | proc = scm_m_expand_body (proc, args); | |
e791c18f | 3669 | goto again; |
2ddb0920 | 3670 | } |
5280aaca | 3671 | else |
17fa3fcf | 3672 | SCM_VALIDATE_NON_EMPTY_COMBINATION (SCM_CAR (proc)); |
2ddb0920 MD |
3673 | } |
3674 | else | |
e791c18f MD |
3675 | SCM_CEVAL (SCM_CAR (proc), args); |
3676 | proc = arg1; | |
2ddb0920 | 3677 | } |
e791c18f | 3678 | RETURN (EVALCAR (proc, args)); |
0717dfd8 | 3679 | case scm_tc7_smob: |
68b06924 | 3680 | if (!SCM_SMOB_APPLICABLE_P (proc)) |
0717dfd8 | 3681 | goto badproc; |
afa38f6e | 3682 | if (SCM_UNBNDP (arg1)) |
ddea3325 | 3683 | RETURN (SCM_SMOB_APPLY_0 (proc)); |
afa38f6e | 3684 | else if (SCM_NULLP (args)) |
ddea3325 | 3685 | RETURN (SCM_SMOB_APPLY_1 (proc, arg1)); |
0717dfd8 | 3686 | else if (SCM_NULLP (SCM_CDR (args))) |
ddea3325 | 3687 | RETURN (SCM_SMOB_APPLY_2 (proc, arg1, SCM_CAR (args))); |
0717dfd8 | 3688 | else |
68b06924 | 3689 | RETURN (SCM_SMOB_APPLY_3 (proc, arg1, SCM_CAR (args), SCM_CDR (args))); |
0f2d19dd JB |
3690 | case scm_tc7_cclo: |
3691 | #ifdef DEVAL | |
6dbd0af5 MD |
3692 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : debug.vect[0].a.args); |
3693 | arg1 = proc; | |
3694 | proc = SCM_CCLO_SUBR (proc); | |
3695 | debug.vect[0].a.proc = proc; | |
3696 | debug.vect[0].a.args = scm_cons (arg1, args); | |
0f2d19dd JB |
3697 | #else |
3698 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
0f2d19dd JB |
3699 | arg1 = proc; |
3700 | proc = SCM_CCLO_SUBR (proc); | |
6dbd0af5 | 3701 | #endif |
0f2d19dd | 3702 | goto tail; |
89efbff4 MD |
3703 | case scm_tc7_pws: |
3704 | proc = SCM_PROCEDURE (proc); | |
3705 | #ifdef DEVAL | |
3706 | debug.vect[0].a.proc = proc; | |
3707 | #endif | |
3708 | goto tail; | |
904a077d | 3709 | case scm_tcs_struct: |
f3d2630a MD |
3710 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) |
3711 | { | |
3712 | #ifdef DEVAL | |
3713 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : debug.vect[0].a.args); | |
3714 | #else | |
3715 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
3716 | #endif | |
195847fa | 3717 | RETURN (scm_apply_generic (proc, args)); |
f3d2630a MD |
3718 | } |
3719 | else if (!SCM_I_OPERATORP (proc)) | |
9b07e212 MD |
3720 | goto badproc; |
3721 | else | |
da7f71d7 MD |
3722 | { |
3723 | #ifdef DEVAL | |
3724 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : debug.vect[0].a.args); | |
3725 | #else | |
3726 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
3727 | #endif | |
3728 | arg1 = proc; | |
195847fa MD |
3729 | proc = (SCM_I_ENTITYP (proc) |
3730 | ? SCM_ENTITY_PROCEDURE (proc) | |
3731 | : SCM_OPERATOR_PROCEDURE (proc)); | |
da7f71d7 MD |
3732 | #ifdef DEVAL |
3733 | debug.vect[0].a.proc = proc; | |
3734 | debug.vect[0].a.args = scm_cons (arg1, args); | |
3735 | #endif | |
195847fa MD |
3736 | if (SCM_NIMP (proc)) |
3737 | goto tail; | |
3738 | else | |
3739 | goto badproc; | |
da7f71d7 | 3740 | } |
0f2d19dd JB |
3741 | default: |
3742 | badproc: | |
db4b4ca6 | 3743 | scm_wrong_type_arg ("apply", SCM_ARG1, proc); |
0f2d19dd JB |
3744 | } |
3745 | #ifdef DEVAL | |
6dbd0af5 | 3746 | exit: |
5132eef0 | 3747 | if (scm_check_exit_p && SCM_TRAPS_P) |
b7ff98dd | 3748 | if (SCM_EXIT_FRAME_P || (SCM_TRACE_P && SCM_TRACED_FRAME_P (debug))) |
6dbd0af5 | 3749 | { |
b7ff98dd MD |
3750 | SCM_CLEAR_TRACED_FRAME (debug); |
3751 | if (SCM_CHEAPTRAPS_P) | |
c0ab1b8d | 3752 | arg1 = scm_make_debugobj (&debug); |
6dbd0af5 MD |
3753 | else |
3754 | { | |
5f144b10 GH |
3755 | int first; |
3756 | SCM val = scm_make_continuation (&first); | |
3757 | ||
3758 | if (first) | |
3759 | arg1 = val; | |
3760 | else | |
6dbd0af5 | 3761 | { |
5f144b10 | 3762 | proc = val; |
6dbd0af5 MD |
3763 | goto ret; |
3764 | } | |
3765 | } | |
d95c0b76 NJ |
3766 | SCM_TRAPS_P = 0; |
3767 | scm_call_3 (SCM_EXIT_FRAME_HDLR, scm_sym_exit_frame, arg1, proc); | |
3768 | SCM_TRAPS_P = 1; | |
6dbd0af5 MD |
3769 | } |
3770 | ret: | |
1646d37b | 3771 | scm_last_debug_frame = debug.prev; |
0f2d19dd JB |
3772 | return proc; |
3773 | #endif | |
3774 | } | |
3775 | ||
6dbd0af5 MD |
3776 | |
3777 | /* SECTION: The rest of this file is only read once. | |
3778 | */ | |
3779 | ||
0f2d19dd JB |
3780 | #ifndef DEVAL |
3781 | ||
d9c393f5 JB |
3782 | /* Typechecking for multi-argument MAP and FOR-EACH. |
3783 | ||
47c3f06d | 3784 | Verify that each element of the vector ARGV, except for the first, |
d9c393f5 | 3785 | is a proper list whose length is LEN. Attribute errors to WHO, |
47c3f06d | 3786 | and claim that the i'th element of ARGV is WHO's i+2'th argument. */ |
d9c393f5 | 3787 | static inline void |
47c3f06d | 3788 | check_map_args (SCM argv, |
c014a02e | 3789 | long len, |
47c3f06d MD |
3790 | SCM gf, |
3791 | SCM proc, | |
3792 | SCM args, | |
3793 | const char *who) | |
d9c393f5 | 3794 | { |
34d19ef6 | 3795 | SCM const *ve = SCM_VELTS (argv); |
c014a02e | 3796 | long i; |
d9c393f5 | 3797 | |
b5c2579a | 3798 | for (i = SCM_VECTOR_LENGTH (argv) - 1; i >= 1; i--) |
d9c393f5 | 3799 | { |
c014a02e | 3800 | long elt_len = scm_ilength (ve[i]); |
d9c393f5 JB |
3801 | |
3802 | if (elt_len < 0) | |
47c3f06d MD |
3803 | { |
3804 | if (gf) | |
3805 | scm_apply_generic (gf, scm_cons (proc, args)); | |
3806 | else | |
3807 | scm_wrong_type_arg (who, i + 2, ve[i]); | |
3808 | } | |
d9c393f5 JB |
3809 | |
3810 | if (elt_len != len) | |
3811 | scm_out_of_range (who, ve[i]); | |
3812 | } | |
3813 | ||
5d2b97cd | 3814 | scm_remember_upto_here_1 (argv); |
d9c393f5 JB |
3815 | } |
3816 | ||
3817 | ||
47c3f06d | 3818 | SCM_GPROC (s_map, "map", 2, 0, 1, scm_map, g_map); |
1cc91f1b | 3819 | |
368bf056 MD |
3820 | /* Note: Currently, scm_map applies PROC to the argument list(s) |
3821 | sequentially, starting with the first element(s). This is used in | |
8878f040 | 3822 | evalext.c where the Scheme procedure `map-in-order', which guarantees |
368bf056 | 3823 | sequential behaviour, is implemented using scm_map. If the |
8878f040 | 3824 | behaviour changes, we need to update `map-in-order'. |
368bf056 MD |
3825 | */ |
3826 | ||
0f2d19dd | 3827 | SCM |
1bbd0b84 | 3828 | scm_map (SCM proc, SCM arg1, SCM args) |
af45e3b0 | 3829 | #define FUNC_NAME s_map |
0f2d19dd | 3830 | { |
c014a02e | 3831 | long i, len; |
0f2d19dd JB |
3832 | SCM res = SCM_EOL; |
3833 | SCM *pres = &res; | |
34d19ef6 | 3834 | SCM const *ve = &args; /* Keep args from being optimized away. */ |
0f2d19dd | 3835 | |
d9c393f5 | 3836 | len = scm_ilength (arg1); |
47c3f06d MD |
3837 | SCM_GASSERTn (len >= 0, |
3838 | g_map, scm_cons2 (proc, arg1, args), SCM_ARG2, s_map); | |
af45e3b0 | 3839 | SCM_VALIDATE_REST_ARGUMENT (args); |
0f2d19dd JB |
3840 | if (SCM_NULLP (args)) |
3841 | { | |
3842 | while (SCM_NIMP (arg1)) | |
3843 | { | |
8ea46249 | 3844 | *pres = scm_list_1 (scm_apply (proc, SCM_CAR (arg1), scm_listofnull)); |
a23afe53 | 3845 | pres = SCM_CDRLOC (*pres); |
0f2d19dd JB |
3846 | arg1 = SCM_CDR (arg1); |
3847 | } | |
3848 | return res; | |
3849 | } | |
47c3f06d | 3850 | args = scm_vector (arg1 = scm_cons (arg1, args)); |
0f2d19dd | 3851 | ve = SCM_VELTS (args); |
47c3f06d | 3852 | check_map_args (args, len, g_map, proc, arg1, s_map); |
0f2d19dd JB |
3853 | while (1) |
3854 | { | |
3855 | arg1 = SCM_EOL; | |
b5c2579a | 3856 | for (i = SCM_VECTOR_LENGTH (args) - 1; i >= 0; i--) |
0f2d19dd | 3857 | { |
d9c393f5 JB |
3858 | if (SCM_IMP (ve[i])) |
3859 | return res; | |
0f2d19dd | 3860 | arg1 = scm_cons (SCM_CAR (ve[i]), arg1); |
34d19ef6 | 3861 | SCM_VECTOR_SET (args, i, SCM_CDR (ve[i])); |
0f2d19dd | 3862 | } |
8ea46249 | 3863 | *pres = scm_list_1 (scm_apply (proc, arg1, SCM_EOL)); |
a23afe53 | 3864 | pres = SCM_CDRLOC (*pres); |
0f2d19dd JB |
3865 | } |
3866 | } | |
af45e3b0 | 3867 | #undef FUNC_NAME |
0f2d19dd JB |
3868 | |
3869 | ||
47c3f06d | 3870 | SCM_GPROC (s_for_each, "for-each", 2, 0, 1, scm_for_each, g_for_each); |
1cc91f1b | 3871 | |
0f2d19dd | 3872 | SCM |
1bbd0b84 | 3873 | scm_for_each (SCM proc, SCM arg1, SCM args) |
af45e3b0 | 3874 | #define FUNC_NAME s_for_each |
0f2d19dd | 3875 | { |
34d19ef6 | 3876 | SCM const *ve = &args; /* Keep args from being optimized away. */ |
c014a02e | 3877 | long i, len; |
d9c393f5 | 3878 | len = scm_ilength (arg1); |
47c3f06d MD |
3879 | SCM_GASSERTn (len >= 0, g_for_each, scm_cons2 (proc, arg1, args), |
3880 | SCM_ARG2, s_for_each); | |
af45e3b0 | 3881 | SCM_VALIDATE_REST_ARGUMENT (args); |
c96d76b8 | 3882 | if (SCM_NULLP (args)) |
0f2d19dd | 3883 | { |
c96d76b8 | 3884 | while (SCM_NIMP (arg1)) |
0f2d19dd | 3885 | { |
0f2d19dd JB |
3886 | scm_apply (proc, SCM_CAR (arg1), scm_listofnull); |
3887 | arg1 = SCM_CDR (arg1); | |
3888 | } | |
3889 | return SCM_UNSPECIFIED; | |
3890 | } | |
47c3f06d | 3891 | args = scm_vector (arg1 = scm_cons (arg1, args)); |
0f2d19dd | 3892 | ve = SCM_VELTS (args); |
47c3f06d | 3893 | check_map_args (args, len, g_for_each, proc, arg1, s_for_each); |
0f2d19dd JB |
3894 | while (1) |
3895 | { | |
3896 | arg1 = SCM_EOL; | |
b5c2579a | 3897 | for (i = SCM_VECTOR_LENGTH (args) - 1; i >= 0; i--) |
0f2d19dd | 3898 | { |
c96d76b8 NJ |
3899 | if (SCM_IMP (ve[i])) |
3900 | return SCM_UNSPECIFIED; | |
0f2d19dd | 3901 | arg1 = scm_cons (SCM_CAR (ve[i]), arg1); |
34d19ef6 | 3902 | SCM_VECTOR_SET (args, i, SCM_CDR (ve[i])); |
0f2d19dd JB |
3903 | } |
3904 | scm_apply (proc, arg1, SCM_EOL); | |
3905 | } | |
3906 | } | |
af45e3b0 | 3907 | #undef FUNC_NAME |
0f2d19dd | 3908 | |
1cc91f1b | 3909 | |
0f2d19dd | 3910 | SCM |
6e8d25a6 | 3911 | scm_closure (SCM code, SCM env) |
0f2d19dd | 3912 | { |
16d4699b MV |
3913 | SCM z; |
3914 | SCM closcar = scm_cons (code, SCM_EOL); | |
228a24ef | 3915 | z = scm_cell (SCM_UNPACK (closcar) + scm_tc3_closure, (scm_t_bits) env); |
16d4699b | 3916 | scm_remember_upto_here (closcar); |
0f2d19dd JB |
3917 | return z; |
3918 | } | |
3919 | ||
3920 | ||
92c2555f | 3921 | scm_t_bits scm_tc16_promise; |
1cc91f1b | 3922 | |
0f2d19dd | 3923 | SCM |
6e8d25a6 | 3924 | scm_makprom (SCM code) |
0f2d19dd | 3925 | { |
cf498326 | 3926 | SCM_RETURN_NEWSMOB (scm_tc16_promise, SCM_UNPACK (code)); |
0f2d19dd JB |
3927 | } |
3928 | ||
3929 | ||
1cc91f1b | 3930 | |
0f2d19dd | 3931 | static int |
e841c3e0 | 3932 | promise_print (SCM exp, SCM port, scm_print_state *pstate) |
0f2d19dd | 3933 | { |
19402679 | 3934 | int writingp = SCM_WRITINGP (pstate); |
b7f3516f | 3935 | scm_puts ("#<promise ", port); |
19402679 | 3936 | SCM_SET_WRITINGP (pstate, 1); |
729dbac3 | 3937 | scm_iprin1 (SCM_CELL_OBJECT_1 (exp), port, pstate); |
19402679 | 3938 | SCM_SET_WRITINGP (pstate, writingp); |
b7f3516f | 3939 | scm_putc ('>', port); |
0f2d19dd JB |
3940 | return !0; |
3941 | } | |
3942 | ||
3943 | ||
3b3b36dd | 3944 | SCM_DEFINE (scm_force, "force", 1, 0, 0, |
67e8151b MG |
3945 | (SCM x), |
3946 | "If the promise @var{x} has not been computed yet, compute and\n" | |
3947 | "return @var{x}, otherwise just return the previously computed\n" | |
3948 | "value.") | |
1bbd0b84 | 3949 | #define FUNC_NAME s_scm_force |
0f2d19dd | 3950 | { |
445f675c DH |
3951 | SCM_VALIDATE_SMOB (1, x, promise); |
3952 | if (!((1L << 16) & SCM_CELL_WORD_0 (x))) | |
0f2d19dd | 3953 | { |
fdc28395 | 3954 | SCM ans = scm_call_0 (SCM_CELL_OBJECT_1 (x)); |
445f675c | 3955 | if (!((1L << 16) & SCM_CELL_WORD_0 (x))) |
0f2d19dd JB |
3956 | { |
3957 | SCM_DEFER_INTS; | |
445f675c DH |
3958 | SCM_SET_CELL_OBJECT_1 (x, ans); |
3959 | SCM_SET_CELL_WORD_0 (x, SCM_CELL_WORD_0 (x) | (1L << 16)); | |
0f2d19dd JB |
3960 | SCM_ALLOW_INTS; |
3961 | } | |
3962 | } | |
445f675c | 3963 | return SCM_CELL_OBJECT_1 (x); |
0f2d19dd | 3964 | } |
1bbd0b84 | 3965 | #undef FUNC_NAME |
0f2d19dd | 3966 | |
445f675c | 3967 | |
a1ec6916 | 3968 | SCM_DEFINE (scm_promise_p, "promise?", 1, 0, 0, |
67e8151b | 3969 | (SCM obj), |
b380b885 | 3970 | "Return true if @var{obj} is a promise, i.e. a delayed computation\n" |
7a095584 | 3971 | "(@pxref{Delayed evaluation,,,r5rs.info,The Revised^5 Report on Scheme}).") |
1bbd0b84 | 3972 | #define FUNC_NAME s_scm_promise_p |
0f2d19dd | 3973 | { |
67e8151b | 3974 | return SCM_BOOL (SCM_TYP16_PREDICATE (scm_tc16_promise, obj)); |
0f2d19dd | 3975 | } |
1bbd0b84 | 3976 | #undef FUNC_NAME |
0f2d19dd | 3977 | |
445f675c | 3978 | |
a1ec6916 | 3979 | SCM_DEFINE (scm_cons_source, "cons-source", 3, 0, 0, |
1bbd0b84 | 3980 | (SCM xorig, SCM x, SCM y), |
11768c04 NJ |
3981 | "Create and return a new pair whose car and cdr are @var{x} and @var{y}.\n" |
3982 | "Any source properties associated with @var{xorig} are also associated\n" | |
3983 | "with the new pair.") | |
1bbd0b84 | 3984 | #define FUNC_NAME s_scm_cons_source |
26d5b9b4 MD |
3985 | { |
3986 | SCM p, z; | |
16d4699b | 3987 | z = scm_cons (x, y); |
26d5b9b4 MD |
3988 | /* Copy source properties possibly associated with xorig. */ |
3989 | p = scm_whash_lookup (scm_source_whash, xorig); | |
445f675c | 3990 | if (!SCM_IMP (p)) |
26d5b9b4 MD |
3991 | scm_whash_insert (scm_source_whash, z, p); |
3992 | return z; | |
3993 | } | |
1bbd0b84 | 3994 | #undef FUNC_NAME |
26d5b9b4 | 3995 | |
445f675c | 3996 | |
a1ec6916 | 3997 | SCM_DEFINE (scm_copy_tree, "copy-tree", 1, 0, 0, |
1bbd0b84 | 3998 | (SCM obj), |
b380b885 MD |
3999 | "Recursively copy the data tree that is bound to @var{obj}, and return a\n" |
4000 | "pointer to the new data structure. @code{copy-tree} recurses down the\n" | |
4001 | "contents of both pairs and vectors (since both cons cells and vector\n" | |
4002 | "cells may point to arbitrary objects), and stops recursing when it hits\n" | |
4003 | "any other object.") | |
1bbd0b84 | 4004 | #define FUNC_NAME s_scm_copy_tree |
0f2d19dd JB |
4005 | { |
4006 | SCM ans, tl; | |
26d5b9b4 | 4007 | if (SCM_IMP (obj)) |
ff467021 | 4008 | return obj; |
3910272e MD |
4009 | if (SCM_VECTORP (obj)) |
4010 | { | |
c014a02e | 4011 | unsigned long i = SCM_VECTOR_LENGTH (obj); |
00ffa0e7 | 4012 | ans = scm_c_make_vector (i, SCM_UNSPECIFIED); |
3910272e | 4013 | while (i--) |
34d19ef6 | 4014 | SCM_VECTOR_SET (ans, i, scm_copy_tree (SCM_VELTS (obj)[i])); |
3910272e MD |
4015 | return ans; |
4016 | } | |
01f11e02 | 4017 | if (!SCM_CONSP (obj)) |
0f2d19dd | 4018 | return obj; |
26d5b9b4 MD |
4019 | ans = tl = scm_cons_source (obj, |
4020 | scm_copy_tree (SCM_CAR (obj)), | |
4021 | SCM_UNSPECIFIED); | |
cabe682c | 4022 | while (obj = SCM_CDR (obj), SCM_CONSP (obj)) |
a23afe53 MD |
4023 | { |
4024 | SCM_SETCDR (tl, scm_cons (scm_copy_tree (SCM_CAR (obj)), | |
4025 | SCM_UNSPECIFIED)); | |
4026 | tl = SCM_CDR (tl); | |
4027 | } | |
4028 | SCM_SETCDR (tl, obj); | |
0f2d19dd JB |
4029 | return ans; |
4030 | } | |
1bbd0b84 | 4031 | #undef FUNC_NAME |
0f2d19dd | 4032 | |
1cc91f1b | 4033 | |
4163eb72 MV |
4034 | /* We have three levels of EVAL here: |
4035 | ||
4036 | - scm_i_eval (exp, env) | |
4037 | ||
4038 | evaluates EXP in environment ENV. ENV is a lexical environment | |
4039 | structure as used by the actual tree code evaluator. When ENV is | |
4040 | a top-level environment, then changes to the current module are | |
a513ead3 | 4041 | tracked by updating ENV so that it continues to be in sync with |
4163eb72 MV |
4042 | the current module. |
4043 | ||
4044 | - scm_primitive_eval (exp) | |
4045 | ||
4046 | evaluates EXP in the top-level environment as determined by the | |
4047 | current module. This is done by constructing a suitable | |
4048 | environment and calling scm_i_eval. Thus, changes to the | |
4049 | top-level module are tracked normally. | |
4050 | ||
4051 | - scm_eval (exp, mod) | |
4052 | ||
a513ead3 | 4053 | evaluates EXP while MOD is the current module. This is done by |
4163eb72 MV |
4054 | setting the current module to MOD, invoking scm_primitive_eval on |
4055 | EXP, and then restoring the current module to the value it had | |
4056 | previously. That is, while EXP is evaluated, changes to the | |
4057 | current module are tracked, but these changes do not persist when | |
4058 | scm_eval returns. | |
4059 | ||
4060 | For each level of evals, there are two variants, distinguished by a | |
4061 | _x suffix: the ordinary variant does not modify EXP while the _x | |
4062 | variant can destructively modify EXP into something completely | |
4063 | unintelligible. A Scheme data structure passed as EXP to one of the | |
4064 | _x variants should not ever be used again for anything. So when in | |
4065 | doubt, use the ordinary variant. | |
4066 | ||
4067 | */ | |
4068 | ||
0f2d19dd | 4069 | SCM |
68d8be66 | 4070 | scm_i_eval_x (SCM exp, SCM env) |
0f2d19dd | 4071 | { |
68d8be66 | 4072 | return SCM_XEVAL (exp, env); |
0f2d19dd JB |
4073 | } |
4074 | ||
68d8be66 MD |
4075 | SCM |
4076 | scm_i_eval (SCM exp, SCM env) | |
4077 | { | |
26fb6390 | 4078 | exp = scm_copy_tree (exp); |
e37a4fba | 4079 | return SCM_XEVAL (exp, env); |
68d8be66 MD |
4080 | } |
4081 | ||
4082 | SCM | |
4163eb72 | 4083 | scm_primitive_eval_x (SCM exp) |
0f2d19dd | 4084 | { |
a513ead3 | 4085 | SCM env; |
bcdab802 | 4086 | SCM transformer = scm_current_module_transformer (); |
a513ead3 | 4087 | if (SCM_NIMP (transformer)) |
fdc28395 | 4088 | exp = scm_call_1 (transformer, exp); |
a513ead3 | 4089 | env = scm_top_level_env (scm_current_module_lookup_closure ()); |
4163eb72 | 4090 | return scm_i_eval_x (exp, env); |
0f2d19dd JB |
4091 | } |
4092 | ||
4163eb72 MV |
4093 | SCM_DEFINE (scm_primitive_eval, "primitive-eval", 1, 0, 0, |
4094 | (SCM exp), | |
2069af38 | 4095 | "Evaluate @var{exp} in the top-level environment specified by\n" |
4163eb72 MV |
4096 | "the current module.") |
4097 | #define FUNC_NAME s_scm_primitive_eval | |
4098 | { | |
a513ead3 | 4099 | SCM env; |
bcdab802 | 4100 | SCM transformer = scm_current_module_transformer (); |
a513ead3 | 4101 | if (SCM_NIMP (transformer)) |
fdc28395 | 4102 | exp = scm_call_1 (transformer, exp); |
a513ead3 | 4103 | env = scm_top_level_env (scm_current_module_lookup_closure ()); |
4163eb72 MV |
4104 | return scm_i_eval (exp, env); |
4105 | } | |
4106 | #undef FUNC_NAME | |
4107 | ||
68d8be66 MD |
4108 | /* Eval does not take the second arg optionally. This is intentional |
4109 | * in order to be R5RS compatible, and to prepare for the new module | |
4110 | * system, where we would like to make the choice of evaluation | |
4163eb72 | 4111 | * environment explicit. */ |
549e6ec6 | 4112 | |
09074dbf DH |
4113 | static void |
4114 | change_environment (void *data) | |
4115 | { | |
4116 | SCM pair = SCM_PACK (data); | |
4117 | SCM new_module = SCM_CAR (pair); | |
aa767bc5 | 4118 | SCM old_module = scm_current_module (); |
09074dbf | 4119 | SCM_SETCDR (pair, old_module); |
aa767bc5 | 4120 | scm_set_current_module (new_module); |
09074dbf DH |
4121 | } |
4122 | ||
4123 | ||
09074dbf DH |
4124 | static void |
4125 | restore_environment (void *data) | |
4126 | { | |
4127 | SCM pair = SCM_PACK (data); | |
4128 | SCM old_module = SCM_CDR (pair); | |
aa767bc5 | 4129 | SCM new_module = scm_current_module (); |
2e9c835d | 4130 | SCM_SETCAR (pair, new_module); |
aa767bc5 | 4131 | scm_set_current_module (old_module); |
09074dbf DH |
4132 | } |
4133 | ||
4163eb72 MV |
4134 | static SCM |
4135 | inner_eval_x (void *data) | |
4136 | { | |
4137 | return scm_primitive_eval_x (SCM_PACK(data)); | |
4138 | } | |
4139 | ||
4140 | SCM | |
4141 | scm_eval_x (SCM exp, SCM module) | |
4142 | #define FUNC_NAME "eval!" | |
4143 | { | |
4144 | SCM_VALIDATE_MODULE (2, module); | |
4145 | ||
4146 | return scm_internal_dynamic_wind | |
4147 | (change_environment, inner_eval_x, restore_environment, | |
4148 | (void *) SCM_UNPACK (exp), | |
4149 | (void *) SCM_UNPACK (scm_cons (module, SCM_BOOL_F))); | |
4150 | } | |
4151 | #undef FUNC_NAME | |
4152 | ||
4153 | static SCM | |
4154 | inner_eval (void *data) | |
4155 | { | |
4156 | return scm_primitive_eval (SCM_PACK(data)); | |
4157 | } | |
09074dbf | 4158 | |
68d8be66 | 4159 | SCM_DEFINE (scm_eval, "eval", 2, 0, 0, |
4163eb72 MV |
4160 | (SCM exp, SCM module), |
4161 | "Evaluate @var{exp}, a list representing a Scheme expression,\n" | |
4162 | "in the top-level environment specified by @var{module}.\n" | |
8f85c0c6 | 4163 | "While @var{exp} is evaluated (using @code{primitive-eval}),\n" |
4163eb72 MV |
4164 | "@var{module} is made the current module. The current module\n" |
4165 | "is reset to its previous value when @var{eval} returns.") | |
1bbd0b84 | 4166 | #define FUNC_NAME s_scm_eval |
0f2d19dd | 4167 | { |
4163eb72 | 4168 | SCM_VALIDATE_MODULE (2, module); |
09074dbf DH |
4169 | |
4170 | return scm_internal_dynamic_wind | |
4171 | (change_environment, inner_eval, restore_environment, | |
4163eb72 MV |
4172 | (void *) SCM_UNPACK (exp), |
4173 | (void *) SCM_UNPACK (scm_cons (module, SCM_BOOL_F))); | |
0f2d19dd | 4174 | } |
1bbd0b84 | 4175 | #undef FUNC_NAME |
0f2d19dd | 4176 | |
6dbd0af5 MD |
4177 | |
4178 | /* At this point, scm_deval and scm_dapply are generated. | |
4179 | */ | |
4180 | ||
0f2d19dd | 4181 | #ifdef DEBUG_EXTENSIONS |
6dbd0af5 MD |
4182 | # define DEVAL |
4183 | # include "eval.c" | |
0f2d19dd JB |
4184 | #endif |
4185 | ||
4186 | ||
1cc91f1b | 4187 | |
0f2d19dd JB |
4188 | void |
4189 | scm_init_eval () | |
0f2d19dd | 4190 | { |
33b97402 MD |
4191 | scm_init_opts (scm_evaluator_traps, |
4192 | scm_evaluator_trap_table, | |
4193 | SCM_N_EVALUATOR_TRAPS); | |
4194 | scm_init_opts (scm_eval_options_interface, | |
4195 | scm_eval_opts, | |
4196 | SCM_N_EVAL_OPTIONS); | |
4197 | ||
f99c9c28 MD |
4198 | scm_tc16_promise = scm_make_smob_type ("promise", 0); |
4199 | scm_set_smob_mark (scm_tc16_promise, scm_markcdr); | |
e841c3e0 | 4200 | scm_set_smob_print (scm_tc16_promise, promise_print); |
b8229a3b | 4201 | |
7c33806a | 4202 | /* Dirk:Fixme:: make scm_undefineds local to eval.c: it's only used here. */ |
8ea46249 | 4203 | scm_undefineds = scm_list_1 (SCM_UNDEFINED); |
7c33806a | 4204 | SCM_SETCDR (scm_undefineds, scm_undefineds); |
8ea46249 | 4205 | scm_listofnull = scm_list_1 (SCM_EOL); |
7c33806a | 4206 | |
9a441ddb | 4207 | scm_f_apply = scm_c_define_subr ("apply", scm_tc7_lsubr_2, scm_apply); |
0f2d19dd | 4208 | |
86d31dfe MV |
4209 | /* acros */ |
4210 | /* end of acros */ | |
4211 | ||
a0599745 | 4212 | #include "libguile/eval.x" |
86d31dfe | 4213 | |
25eaf21a | 4214 | scm_add_feature ("delay"); |
0f2d19dd | 4215 | } |
0f2d19dd | 4216 | |
6dbd0af5 | 4217 | #endif /* !DEVAL */ |
89e00824 ML |
4218 | |
4219 | /* | |
4220 | Local Variables: | |
4221 | c-file-style: "gnu" | |
4222 | End: | |
4223 | */ |