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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 | |
9bc4701c MD |
155 | SCM_REC_CRITICAL_SECTION (source); |
156 | #define SOURCE_SECTION_START SCM_REC_CRITICAL_SECTION_START (source); | |
157 | #define SOURCE_SECTION_END SCM_REC_CRITICAL_SECTION_END (source); | |
158 | ||
0f2d19dd | 159 | SCM * |
6e8d25a6 | 160 | scm_ilookup (SCM iloc, SCM env) |
0f2d19dd | 161 | { |
c014a02e | 162 | register long ir = SCM_IFRAME (iloc); |
0f2d19dd JB |
163 | register SCM er = env; |
164 | for (; 0 != ir; --ir) | |
165 | er = SCM_CDR (er); | |
166 | er = SCM_CAR (er); | |
167 | for (ir = SCM_IDIST (iloc); 0 != ir; --ir) | |
168 | er = SCM_CDR (er); | |
169 | if (SCM_ICDRP (iloc)) | |
a23afe53 MD |
170 | return SCM_CDRLOC (er); |
171 | return SCM_CARLOC (SCM_CDR (er)); | |
0f2d19dd | 172 | } |
0f2d19dd | 173 | |
f8769b1d MV |
174 | /* The Lookup Car Race |
175 | - by Eva Luator | |
176 | ||
177 | Memoization of variables and special forms is done while executing | |
178 | the code for the first time. As long as there is only one thread | |
179 | everything is fine, but as soon as two threads execute the same | |
180 | code concurrently `for the first time' they can come into conflict. | |
181 | ||
182 | This memoization includes rewriting variable references into more | |
183 | efficient forms and expanding macros. Furthermore, macro expansion | |
184 | includes `compiling' special forms like `let', `cond', etc. into | |
185 | tree-code instructions. | |
186 | ||
187 | There shouldn't normally be a problem with memoizing local and | |
904a077d | 188 | global variable references (into ilocs and variables), because all |
f8769b1d MV |
189 | threads will mutate the code in *exactly* the same way and (if I |
190 | read the C code correctly) it is not possible to observe a half-way | |
191 | mutated cons cell. The lookup procedure can handle this | |
192 | transparently without any critical sections. | |
193 | ||
194 | It is different with macro expansion, because macro expansion | |
195 | happens outside of the lookup procedure and can't be | |
904a077d MV |
196 | undone. Therefore the lookup procedure can't cope with it. It has |
197 | to indicate failure when it detects a lost race and hope that the | |
198 | caller can handle it. Luckily, it turns out that this is the case. | |
f8769b1d | 199 | |
904a077d | 200 | An example to illustrate this: Suppose that the following form will |
f8769b1d MV |
201 | be memoized concurrently by two threads |
202 | ||
203 | (let ((x 12)) x) | |
204 | ||
205 | Let's first examine the lookup of X in the body. The first thread | |
206 | decides that it has to find the symbol "x" in the environment and | |
207 | starts to scan it. Then the other thread takes over and actually | |
208 | overtakes the first. It looks up "x" and substitutes an | |
209 | appropriate iloc for it. Now the first thread continues and | |
210 | completes its lookup. It comes to exactly the same conclusions as | |
211 | the second one and could - without much ado - just overwrite the | |
212 | iloc with the same iloc. | |
213 | ||
214 | But let's see what will happen when the race occurs while looking | |
215 | up the symbol "let" at the start of the form. It could happen that | |
216 | the second thread interrupts the lookup of the first thread and not | |
904a077d MV |
217 | only substitutes a variable for it but goes right ahead and |
218 | replaces it with the compiled form (#@let* (x 12) x). Now, when | |
219 | the first thread completes its lookup, it would replace the #@let* | |
220 | with a variable containing the "let" binding, effectively reverting | |
221 | the form to (let (x 12) x). This is wrong. It has to detect that | |
222 | it has lost the race and the evaluator has to reconsider the | |
223 | changed form completely. | |
f8769b1d MV |
224 | |
225 | This race condition could be resolved with some kind of traffic | |
226 | light (like mutexes) around scm_lookupcar, but I think that it is | |
227 | best to avoid them in this case. They would serialize memoization | |
228 | completely and because lookup involves calling arbitrary Scheme | |
229 | code (via the lookup-thunk), threads could be blocked for an | |
230 | arbitrary amount of time or even deadlock. But with the current | |
231 | solution a lot of unnecessary work is potentially done. */ | |
232 | ||
233 | /* SCM_LOOKUPCAR1 is was SCM_LOOKUPCAR used to be but is allowed to | |
234 | return NULL to indicate a failed lookup due to some race conditions | |
235 | between threads. This only happens when VLOC is the first cell of | |
236 | a special form that will eventually be memoized (like `let', etc.) | |
237 | In that case the whole lookup is bogus and the caller has to | |
238 | reconsider the complete special form. | |
239 | ||
240 | SCM_LOOKUPCAR is still there, of course. It just calls | |
de513fa0 | 241 | SCM_LOOKUPCAR1 and aborts on receiving NULL. So SCM_LOOKUPCAR |
f8769b1d MV |
242 | should only be called when it is known that VLOC is not the first |
243 | pair of a special form. Otherwise, use SCM_LOOKUPCAR1 and check | |
26d5b9b4 MD |
244 | for NULL. I think I've found the only places where this |
245 | applies. */ | |
f8769b1d | 246 | |
f25f761d GH |
247 | SCM_SYMBOL (scm_unbound_variable_key, "unbound-variable"); |
248 | ||
8ecf1f13 | 249 | static SCM * |
26d5b9b4 | 250 | scm_lookupcar1 (SCM vloc, SCM genv, int check) |
0f2d19dd JB |
251 | { |
252 | SCM env = genv; | |
e3173f93 | 253 | register SCM *al, fl, var = SCM_CAR (vloc); |
0f2d19dd | 254 | register SCM iloc = SCM_ILOC00; |
0f2d19dd JB |
255 | for (; SCM_NIMP (env); env = SCM_CDR (env)) |
256 | { | |
790071cd | 257 | if (!SCM_CONSP (SCM_CAR (env))) |
0f2d19dd | 258 | break; |
a23afe53 | 259 | al = SCM_CARLOC (env); |
0f2d19dd JB |
260 | for (fl = SCM_CAR (*al); SCM_NIMP (fl); fl = SCM_CDR (fl)) |
261 | { | |
01f11e02 | 262 | if (!SCM_CONSP (fl)) |
33b97402 | 263 | { |
cf498326 | 264 | if (SCM_EQ_P (fl, var)) |
0f2d19dd | 265 | { |
cf498326 | 266 | if (! SCM_EQ_P (SCM_CAR (vloc), var)) |
f8769b1d | 267 | goto race; |
3201d763 | 268 | SCM_SET_CELL_WORD_0 (vloc, SCM_UNPACK (iloc) + SCM_ICDR); |
a23afe53 | 269 | return SCM_CDRLOC (*al); |
0f2d19dd | 270 | } |
33b97402 MD |
271 | else |
272 | break; | |
273 | } | |
a23afe53 | 274 | al = SCM_CDRLOC (*al); |
cf498326 | 275 | if (SCM_EQ_P (SCM_CAR (fl), var)) |
0f2d19dd | 276 | { |
0f2d19dd JB |
277 | if (SCM_UNBNDP (SCM_CAR (*al))) |
278 | { | |
279 | env = SCM_EOL; | |
280 | goto errout; | |
281 | } | |
c6772927 | 282 | if (!SCM_EQ_P (SCM_CAR (vloc), var)) |
f8769b1d | 283 | goto race; |
a23afe53 | 284 | SCM_SETCAR (vloc, iloc); |
a23afe53 | 285 | return SCM_CARLOC (*al); |
0f2d19dd | 286 | } |
3201d763 | 287 | iloc = SCM_PACK (SCM_UNPACK (iloc) + SCM_IDINC); |
0f2d19dd | 288 | } |
3201d763 | 289 | iloc = SCM_PACK ((~SCM_IDSTMSK) & (SCM_UNPACK(iloc) + SCM_IFRINC)); |
0f2d19dd JB |
290 | } |
291 | { | |
86d31dfe | 292 | SCM top_thunk, real_var; |
790071cd | 293 | if (SCM_NIMP (env)) |
0f2d19dd | 294 | { |
86d31dfe MV |
295 | top_thunk = SCM_CAR (env); /* env now refers to a |
296 | top level env thunk */ | |
0f2d19dd JB |
297 | env = SCM_CDR (env); |
298 | } | |
299 | else | |
300 | top_thunk = SCM_BOOL_F; | |
86d31dfe MV |
301 | real_var = scm_sym2var (var, top_thunk, SCM_BOOL_F); |
302 | if (SCM_FALSEP (real_var)) | |
0f2d19dd | 303 | goto errout; |
86d31dfe | 304 | |
01f11e02 | 305 | if (!SCM_NULLP (env) || SCM_UNBNDP (SCM_VARIABLE_REF (real_var))) |
86d31dfe MV |
306 | { |
307 | errout: | |
86d31dfe MV |
308 | if (check) |
309 | { | |
310 | if (SCM_NULLP (env)) | |
311 | scm_error (scm_unbound_variable_key, NULL, | |
312 | "Unbound variable: ~S", | |
8ea46249 | 313 | scm_list_1 (var), SCM_BOOL_F); |
86d31dfe MV |
314 | else |
315 | scm_misc_error (NULL, "Damaged environment: ~S", | |
8ea46249 | 316 | scm_list_1 (var)); |
86d31dfe MV |
317 | } |
318 | else | |
319 | { | |
320 | /* A variable could not be found, but we shall | |
321 | not throw an error. */ | |
322 | static SCM undef_object = SCM_UNDEFINED; | |
323 | return &undef_object; | |
324 | } | |
09e4d064 | 325 | } |
86d31dfe | 326 | |
c6772927 | 327 | if (!SCM_EQ_P (SCM_CAR (vloc), var)) |
86d31dfe MV |
328 | { |
329 | /* Some other thread has changed the very cell we are working | |
330 | on. In effect, it must have done our job or messed it up | |
331 | completely. */ | |
332 | race: | |
333 | var = SCM_CAR (vloc); | |
d22a0ea1 MV |
334 | if (SCM_VARIABLEP (var)) |
335 | return SCM_VARIABLE_LOC (var); | |
86d31dfe MV |
336 | if (SCM_ITAG7 (var) == SCM_ITAG7 (SCM_ILOC00)) |
337 | return scm_ilookup (var, genv); | |
904a077d | 338 | /* We can't cope with anything else than variables and ilocs. When |
86d31dfe MV |
339 | a special form has been memoized (i.e. `let' into `#@let') we |
340 | return NULL and expect the calling function to do the right | |
341 | thing. For the evaluator, this means going back and redoing | |
342 | the dispatch on the car of the form. */ | |
343 | return NULL; | |
344 | } | |
f8769b1d | 345 | |
d22a0ea1 | 346 | SCM_SETCAR (vloc, real_var); |
86d31dfe MV |
347 | return SCM_VARIABLE_LOC (real_var); |
348 | } | |
0f2d19dd JB |
349 | } |
350 | ||
f8769b1d | 351 | SCM * |
6e8d25a6 | 352 | scm_lookupcar (SCM vloc, SCM genv, int check) |
f8769b1d | 353 | { |
26d5b9b4 | 354 | SCM *loc = scm_lookupcar1 (vloc, genv, check); |
f8769b1d MV |
355 | if (loc == NULL) |
356 | abort (); | |
357 | return loc; | |
358 | } | |
f8769b1d | 359 | |
0f2d19dd | 360 | #define unmemocar scm_unmemocar |
1cc91f1b | 361 | |
86d31dfe MV |
362 | SCM_SYMBOL (sym_three_question_marks, "???"); |
363 | ||
0f2d19dd | 364 | SCM |
6e8d25a6 | 365 | scm_unmemocar (SCM form, SCM env) |
0f2d19dd | 366 | { |
302c12b4 | 367 | if (!SCM_CONSP (form)) |
0f2d19dd | 368 | return form; |
302c12b4 | 369 | else |
d22a0ea1 | 370 | { |
302c12b4 DH |
371 | SCM c = SCM_CAR (form); |
372 | if (SCM_VARIABLEP (c)) | |
373 | { | |
374 | SCM sym = scm_module_reverse_lookup (scm_env_module (env), c); | |
375 | if (SCM_FALSEP (sym)) | |
376 | sym = sym_three_question_marks; | |
377 | SCM_SETCAR (form, sym); | |
378 | } | |
302c12b4 DH |
379 | else if (SCM_ILOCP (c)) |
380 | { | |
381 | unsigned long int ir; | |
382 | ||
383 | for (ir = SCM_IFRAME (c); ir != 0; --ir) | |
384 | env = SCM_CDR (env); | |
385 | env = SCM_CAAR (env); | |
386 | for (ir = SCM_IDIST (c); ir != 0; --ir) | |
387 | env = SCM_CDR (env); | |
388 | SCM_SETCAR (form, SCM_ICDRP (c) ? env : SCM_CAR (env)); | |
389 | } | |
302c12b4 DH |
390 | return form; |
391 | } | |
0f2d19dd JB |
392 | } |
393 | ||
1cc91f1b | 394 | |
0f2d19dd | 395 | SCM |
6e8d25a6 | 396 | scm_eval_car (SCM pair, SCM env) |
0f2d19dd | 397 | { |
6cb702da | 398 | return SCM_XEVALCAR (pair, env); |
0f2d19dd JB |
399 | } |
400 | ||
401 | \f | |
402 | /* | |
403 | * The following rewrite expressions and | |
404 | * some memoized forms have different syntax | |
405 | */ | |
406 | ||
3eeba8d4 JB |
407 | const char scm_s_expression[] = "missing or extra expression"; |
408 | const char scm_s_test[] = "bad test"; | |
409 | const char scm_s_body[] = "bad body"; | |
410 | const char scm_s_bindings[] = "bad bindings"; | |
185ab0ef | 411 | const char scm_s_duplicate_bindings[] = "duplicate bindings"; |
3eeba8d4 JB |
412 | const char scm_s_variable[] = "bad variable"; |
413 | const char scm_s_clauses[] = "bad or missing clauses"; | |
414 | const char scm_s_formals[] = "bad formals"; | |
5280aaca | 415 | const char scm_s_duplicate_formals[] = "duplicate formals"; |
302c12b4 | 416 | static const char s_splicing[] = "bad (non-list) result for unquote-splicing"; |
0f2d19dd | 417 | |
85db4a2c DH |
418 | SCM_GLOBAL_SYMBOL (scm_sym_dot, "."); |
419 | SCM_GLOBAL_SYMBOL (scm_sym_arrow, "=>"); | |
420 | SCM_GLOBAL_SYMBOL (scm_sym_else, "else"); | |
421 | SCM_GLOBAL_SYMBOL (scm_sym_unquote, "unquote"); | |
422 | SCM_GLOBAL_SYMBOL (scm_sym_uq_splicing, "unquote-splicing"); | |
81123e6d MD |
423 | |
424 | SCM scm_f_apply; | |
b8229a3b | 425 | |
6dbd0af5 | 426 | #ifdef DEBUG_EXTENSIONS |
85db4a2c DH |
427 | SCM_GLOBAL_SYMBOL (scm_sym_enter_frame, "enter-frame"); |
428 | SCM_GLOBAL_SYMBOL (scm_sym_apply_frame, "apply-frame"); | |
429 | SCM_GLOBAL_SYMBOL (scm_sym_exit_frame, "exit-frame"); | |
430 | SCM_GLOBAL_SYMBOL (scm_sym_trace, "trace"); | |
6dbd0af5 | 431 | #endif |
0f2d19dd | 432 | |
0f2d19dd | 433 | |
26d5b9b4 MD |
434 | /* Check that the body denoted by XORIG is valid and rewrite it into |
435 | its internal form. The internal form of a body is just the body | |
436 | itself, but prefixed with an ISYM that denotes to what kind of | |
437 | outer construct this body belongs. A lambda body starts with | |
438 | SCM_IM_LAMBDA, for example, a body of a let starts with SCM_IM_LET, | |
439 | etc. The one exception is a body that belongs to a letrec that has | |
440 | been formed by rewriting internal defines: it starts with | |
441 | SCM_IM_DEFINE. */ | |
442 | ||
443 | /* XXX - Besides controlling the rewriting of internal defines, the | |
444 | additional ISYM could be used for improved error messages. | |
445 | This is not done yet. */ | |
446 | ||
447 | static SCM | |
6e8d25a6 | 448 | scm_m_body (SCM op, SCM xorig, const char *what) |
26d5b9b4 | 449 | { |
302c12b4 | 450 | SCM_ASSYNT (scm_ilength (xorig) >= 1, scm_s_body, what); |
26d5b9b4 MD |
451 | |
452 | /* Don't add another ISYM if one is present already. */ | |
453 | if (SCM_ISYMP (SCM_CAR (xorig))) | |
454 | return xorig; | |
455 | ||
456 | /* Retain possible doc string. */ | |
44d3cb0d | 457 | if (!SCM_CONSP (SCM_CAR (xorig))) |
26d5b9b4 | 458 | { |
8ea46249 | 459 | if (!SCM_NULLP (SCM_CDR (xorig))) |
26d5b9b4 | 460 | return scm_cons (SCM_CAR (xorig), |
8ea46249 | 461 | scm_m_body (op, SCM_CDR (xorig), what)); |
26d5b9b4 MD |
462 | return xorig; |
463 | } | |
464 | ||
ab66ae47 | 465 | return scm_cons (op, xorig); |
26d5b9b4 MD |
466 | } |
467 | ||
1cc91f1b | 468 | |
8ea46249 DH |
469 | SCM_SYNTAX (s_quote, "quote", scm_makmmacro, scm_m_quote); |
470 | SCM_GLOBAL_SYMBOL (scm_sym_quote, s_quote); | |
471 | ||
472 | SCM | |
e81d98ec | 473 | scm_m_quote (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 474 | { |
160bb34a | 475 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, scm_s_expression, s_quote); |
302c12b4 | 476 | return scm_cons (SCM_IM_QUOTE, SCM_CDR (xorig)); |
0f2d19dd JB |
477 | } |
478 | ||
479 | ||
8ea46249 DH |
480 | SCM_SYNTAX (s_begin, "begin", scm_makmmacro, scm_m_begin); |
481 | SCM_GLOBAL_SYMBOL (scm_sym_begin, s_begin); | |
1cc91f1b | 482 | |
8ea46249 | 483 | SCM |
e81d98ec | 484 | scm_m_begin (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 485 | { |
b8113bc8 | 486 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) >= 0, scm_s_expression, s_begin); |
3a3111a8 | 487 | return scm_cons (SCM_IM_BEGIN, SCM_CDR (xorig)); |
0f2d19dd JB |
488 | } |
489 | ||
1cc91f1b | 490 | |
8ea46249 DH |
491 | SCM_SYNTAX (s_if, "if", scm_makmmacro, scm_m_if); |
492 | SCM_GLOBAL_SYMBOL (scm_sym_if, s_if); | |
493 | ||
494 | SCM | |
e81d98ec | 495 | scm_m_if (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 496 | { |
c014a02e | 497 | long len = scm_ilength (SCM_CDR (xorig)); |
c96d76b8 | 498 | SCM_ASSYNT (len >= 2 && len <= 3, scm_s_expression, s_if); |
3a3111a8 | 499 | return scm_cons (SCM_IM_IF, SCM_CDR (xorig)); |
0f2d19dd JB |
500 | } |
501 | ||
502 | ||
89efbff4 | 503 | /* Will go into the RnRS module when Guile is factorized. |
8ea46249 | 504 | SCM_SYNTAX (scm_s_set_x,"set!", scm_makmmacro, scm_m_set_x); */ |
89efbff4 | 505 | const char scm_s_set_x[] = "set!"; |
8ea46249 | 506 | SCM_GLOBAL_SYMBOL (scm_sym_set_x, scm_s_set_x); |
1cc91f1b | 507 | |
8ea46249 | 508 | SCM |
e81d98ec | 509 | scm_m_set_x (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 510 | { |
6dbd0af5 | 511 | SCM x = SCM_CDR (xorig); |
8ea46249 | 512 | SCM_ASSYNT (scm_ilength (x) == 2, scm_s_expression, scm_s_set_x); |
160bb34a | 513 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (x)), scm_s_variable, scm_s_set_x); |
3a3111a8 | 514 | return scm_cons (SCM_IM_SET_X, x); |
0f2d19dd JB |
515 | } |
516 | ||
517 | ||
8ea46249 DH |
518 | SCM_SYNTAX (s_and, "and", scm_makmmacro, scm_m_and); |
519 | SCM_GLOBAL_SYMBOL (scm_sym_and, s_and); | |
1cc91f1b | 520 | |
8ea46249 | 521 | SCM |
e81d98ec | 522 | scm_m_and (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 523 | { |
c014a02e | 524 | long len = scm_ilength (SCM_CDR (xorig)); |
160bb34a | 525 | SCM_ASSYNT (len >= 0, scm_s_test, s_and); |
0f2d19dd | 526 | if (len >= 1) |
3a3111a8 | 527 | return scm_cons (SCM_IM_AND, SCM_CDR (xorig)); |
0f2d19dd JB |
528 | else |
529 | return SCM_BOOL_T; | |
530 | } | |
531 | ||
1cc91f1b | 532 | |
8ea46249 DH |
533 | SCM_SYNTAX (s_or, "or", scm_makmmacro, scm_m_or); |
534 | SCM_GLOBAL_SYMBOL (scm_sym_or, s_or); | |
535 | ||
536 | SCM | |
e81d98ec | 537 | scm_m_or (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 538 | { |
c014a02e | 539 | long len = scm_ilength (SCM_CDR (xorig)); |
160bb34a | 540 | SCM_ASSYNT (len >= 0, scm_s_test, s_or); |
0f2d19dd | 541 | if (len >= 1) |
3a3111a8 | 542 | return scm_cons (SCM_IM_OR, SCM_CDR (xorig)); |
0f2d19dd JB |
543 | else |
544 | return SCM_BOOL_F; | |
545 | } | |
546 | ||
547 | ||
8ea46249 DH |
548 | SCM_SYNTAX (s_case, "case", scm_makmmacro, scm_m_case); |
549 | SCM_GLOBAL_SYMBOL (scm_sym_case, s_case); | |
1cc91f1b | 550 | |
8ea46249 | 551 | SCM |
e81d98ec | 552 | scm_m_case (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 553 | { |
8ea46249 DH |
554 | SCM clauses; |
555 | SCM cdrx = SCM_CDR (xorig); | |
556 | SCM_ASSYNT (scm_ilength (cdrx) >= 2, scm_s_clauses, s_case); | |
557 | clauses = SCM_CDR (cdrx); | |
558 | while (!SCM_NULLP (clauses)) | |
0f2d19dd | 559 | { |
8ea46249 DH |
560 | SCM clause = SCM_CAR (clauses); |
561 | SCM_ASSYNT (scm_ilength (clause) >= 2, scm_s_clauses, s_case); | |
562 | SCM_ASSYNT (scm_ilength (SCM_CAR (clause)) >= 0 | |
563 | || (SCM_EQ_P (scm_sym_else, SCM_CAR (clause)) | |
564 | && SCM_NULLP (SCM_CDR (clauses))), | |
160bb34a | 565 | scm_s_clauses, s_case); |
8ea46249 | 566 | clauses = SCM_CDR (clauses); |
0f2d19dd | 567 | } |
3a3111a8 | 568 | return scm_cons (SCM_IM_CASE, cdrx); |
0f2d19dd JB |
569 | } |
570 | ||
571 | ||
8ea46249 DH |
572 | SCM_SYNTAX (s_cond, "cond", scm_makmmacro, scm_m_cond); |
573 | SCM_GLOBAL_SYMBOL (scm_sym_cond, s_cond); | |
1cc91f1b | 574 | |
8ea46249 | 575 | SCM |
e81d98ec | 576 | scm_m_cond (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 577 | { |
8ea46249 DH |
578 | SCM cdrx = SCM_CDR (xorig); |
579 | SCM clauses = cdrx; | |
580 | SCM_ASSYNT (scm_ilength (clauses) >= 1, scm_s_clauses, s_cond); | |
581 | while (!SCM_NULLP (clauses)) | |
0f2d19dd | 582 | { |
8ea46249 DH |
583 | SCM clause = SCM_CAR (clauses); |
584 | long len = scm_ilength (clause); | |
160bb34a | 585 | SCM_ASSYNT (len >= 1, scm_s_clauses, s_cond); |
8ea46249 | 586 | if (SCM_EQ_P (scm_sym_else, SCM_CAR (clause))) |
0f2d19dd | 587 | { |
8ea46249 DH |
588 | int last_clause_p = SCM_NULLP (SCM_CDR (clauses)); |
589 | SCM_ASSYNT (len >= 2 && last_clause_p, "bad ELSE clause", s_cond); | |
0f2d19dd | 590 | } |
8ea46249 DH |
591 | else if (len >= 2 && SCM_EQ_P (scm_sym_arrow, SCM_CADR (clause))) |
592 | { | |
593 | SCM_ASSYNT (len > 2, "missing recipient", s_cond); | |
594 | SCM_ASSYNT (len == 3, "bad recipient", s_cond); | |
595 | } | |
596 | clauses = SCM_CDR (clauses); | |
0f2d19dd | 597 | } |
3a3111a8 | 598 | return scm_cons (SCM_IM_COND, cdrx); |
0f2d19dd JB |
599 | } |
600 | ||
1cc91f1b | 601 | |
8ea46249 DH |
602 | SCM_SYNTAX (s_lambda, "lambda", scm_makmmacro, scm_m_lambda); |
603 | SCM_GLOBAL_SYMBOL (scm_sym_lambda, s_lambda); | |
5280aaca | 604 | |
8ea46249 DH |
605 | /* Return true if OBJ is `eq?' to one of the elements of LIST or to the |
606 | * cdr of the last cons. (Thus, LIST is not required to be a proper | |
607 | * list and OBJ can also be found in the improper ending.) */ | |
5280aaca MV |
608 | static int |
609 | scm_c_improper_memq (SCM obj, SCM list) | |
610 | { | |
611 | for (; SCM_CONSP (list); list = SCM_CDR (list)) | |
612 | { | |
613 | if (SCM_EQ_P (SCM_CAR (list), obj)) | |
c6772927 | 614 | return 1; |
5280aaca MV |
615 | } |
616 | return SCM_EQ_P (list, obj); | |
617 | } | |
618 | ||
8ea46249 | 619 | SCM |
e81d98ec | 620 | scm_m_lambda (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 621 | { |
8ea46249 DH |
622 | SCM formals; |
623 | SCM x = SCM_CDR (xorig); | |
302c12b4 DH |
624 | |
625 | SCM_ASSYNT (SCM_CONSP (x), scm_s_formals, s_lambda); | |
8ea46249 DH |
626 | |
627 | formals = SCM_CAR (x); | |
628 | while (SCM_CONSP (formals)) | |
0f2d19dd | 629 | { |
8ea46249 DH |
630 | SCM formal = SCM_CAR (formals); |
631 | SCM_ASSYNT (SCM_SYMBOLP (formal), scm_s_formals, s_lambda); | |
632 | if (scm_c_improper_memq (formal, SCM_CDR (formals))) | |
db4b4ca6 | 633 | scm_misc_error (s_lambda, scm_s_duplicate_formals, SCM_EOL); |
8ea46249 | 634 | formals = SCM_CDR (formals); |
26d5b9b4 | 635 | } |
8ea46249 DH |
636 | if (!SCM_NULLP (formals) && !SCM_SYMBOLP (formals)) |
637 | scm_misc_error (s_lambda, scm_s_formals, SCM_EOL); | |
26d5b9b4 | 638 | |
3a3111a8 MD |
639 | return scm_cons2 (SCM_IM_LAMBDA, SCM_CAR (x), |
640 | scm_m_body (SCM_IM_LAMBDA, SCM_CDR (x), s_lambda)); | |
0f2d19dd JB |
641 | } |
642 | ||
643 | ||
8ea46249 DH |
644 | SCM_SYNTAX (s_letstar, "let*", scm_makmmacro, scm_m_letstar); |
645 | SCM_GLOBAL_SYMBOL (scm_sym_letstar, s_letstar); | |
1cc91f1b | 646 | |
8ea46249 DH |
647 | /* (let* ((v1 i1) (v2 i2) ...) body) with variables v1 .. vk and initializers |
648 | * i1 .. ik is transformed into the form (#@let* (v1 i1 v2 i2 ...) body*). */ | |
649 | SCM | |
e81d98ec | 650 | scm_m_letstar (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 651 | { |
8ea46249 DH |
652 | SCM bindings; |
653 | SCM x = SCM_CDR (xorig); | |
654 | SCM vars = SCM_EOL; | |
655 | SCM *varloc = &vars; | |
302c12b4 DH |
656 | |
657 | SCM_ASSYNT (SCM_CONSP (x), scm_s_bindings, s_letstar); | |
658 | ||
8ea46249 DH |
659 | bindings = SCM_CAR (x); |
660 | SCM_ASSYNT (scm_ilength (bindings) >= 0, scm_s_bindings, s_letstar); | |
661 | while (!SCM_NULLP (bindings)) | |
0f2d19dd | 662 | { |
8ea46249 DH |
663 | SCM binding = SCM_CAR (bindings); |
664 | SCM_ASSYNT (scm_ilength (binding) == 2, scm_s_bindings, s_letstar); | |
665 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (binding)), scm_s_variable, s_letstar); | |
666 | *varloc = scm_list_2 (SCM_CAR (binding), SCM_CADR (binding)); | |
a23afe53 | 667 | varloc = SCM_CDRLOC (SCM_CDR (*varloc)); |
8ea46249 | 668 | bindings = SCM_CDR (bindings); |
0f2d19dd | 669 | } |
302c12b4 | 670 | |
8ea46249 | 671 | return scm_cons2 (SCM_IM_LETSTAR, vars, |
3a3111a8 | 672 | scm_m_body (SCM_IM_LETSTAR, SCM_CDR (x), s_letstar)); |
0f2d19dd JB |
673 | } |
674 | ||
8ea46249 | 675 | |
302c12b4 DH |
676 | /* DO gets the most radically altered syntax. The order of the vars is |
677 | * reversed here. In contrast, the order of the inits and steps is reversed | |
678 | * during the evaluation: | |
679 | ||
0f2d19dd JB |
680 | (do ((<var1> <init1> <step1>) |
681 | (<var2> <init2>) | |
682 | ... ) | |
683 | (<test> <return>) | |
684 | <body>) | |
302c12b4 | 685 | |
0f2d19dd | 686 | ;; becomes |
302c12b4 DH |
687 | |
688 | (#@do (varn ... var2 var1) | |
0f2d19dd JB |
689 | (<init1> <init2> ... <initn>) |
690 | (<test> <return>) | |
691 | (<body>) | |
692 | <step1> <step2> ... <stepn>) ;; missing steps replaced by var | |
302c12b4 | 693 | */ |
0f2d19dd | 694 | |
b8229a3b | 695 | SCM_SYNTAX(s_do, "do", scm_makmmacro, scm_m_do); |
2f0d1375 | 696 | SCM_GLOBAL_SYMBOL(scm_sym_do, s_do); |
1cc91f1b | 697 | |
0f2d19dd | 698 | SCM |
e81d98ec | 699 | scm_m_do (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 700 | { |
8ea46249 DH |
701 | SCM bindings; |
702 | SCM x = SCM_CDR (xorig); | |
703 | SCM vars = SCM_EOL; | |
704 | SCM inits = SCM_EOL; | |
705 | SCM *initloc = &inits; | |
706 | SCM steps = SCM_EOL; | |
707 | SCM *steploc = &steps; | |
708 | SCM_ASSYNT (scm_ilength (x) >= 2, scm_s_test, "do"); | |
709 | bindings = SCM_CAR (x); | |
710 | SCM_ASSYNT (scm_ilength (bindings) >= 0, scm_s_bindings, "do"); | |
711 | while (!SCM_NULLP (bindings)) | |
0f2d19dd | 712 | { |
302c12b4 DH |
713 | SCM binding = SCM_CAR (bindings); |
714 | long len = scm_ilength (binding); | |
8ea46249 | 715 | SCM_ASSYNT (len == 2 || len == 3, scm_s_bindings, "do"); |
302c12b4 DH |
716 | { |
717 | SCM name = SCM_CAR (binding); | |
718 | SCM init = SCM_CADR (binding); | |
719 | SCM step = (len == 2) ? name : SCM_CADDR (binding); | |
720 | SCM_ASSYNT (SCM_SYMBOLP (name), scm_s_variable, "do"); | |
721 | vars = scm_cons (name, vars); | |
722 | *initloc = scm_list_1 (init); | |
723 | initloc = SCM_CDRLOC (*initloc); | |
724 | *steploc = scm_list_1 (step); | |
725 | steploc = SCM_CDRLOC (*steploc); | |
726 | bindings = SCM_CDR (bindings); | |
727 | } | |
0f2d19dd JB |
728 | } |
729 | x = SCM_CDR (x); | |
160bb34a | 730 | SCM_ASSYNT (scm_ilength (SCM_CAR (x)) >= 1, scm_s_test, "do"); |
0f2d19dd JB |
731 | x = scm_cons2 (SCM_CAR (x), SCM_CDR (x), steps); |
732 | x = scm_cons2 (vars, inits, x); | |
3a3111a8 | 733 | return scm_cons (SCM_IM_DO, x); |
0f2d19dd JB |
734 | } |
735 | ||
b8229a3b | 736 | |
302c12b4 DH |
737 | SCM_SYNTAX (s_quasiquote, "quasiquote", scm_makacro, scm_m_quasiquote); |
738 | SCM_GLOBAL_SYMBOL (scm_sym_quasiquote, s_quasiquote); | |
b8229a3b | 739 | |
302c12b4 DH |
740 | /* Internal function to handle a quasiquotation: 'form' is the parameter in |
741 | * the call (quasiquotation form), 'env' is the environment where unquoted | |
742 | * expressions will be evaluated, and 'depth' is the current quasiquotation | |
743 | * nesting level and is known to be greater than zero. */ | |
0f2d19dd | 744 | static SCM |
302c12b4 | 745 | iqq (SCM form, SCM env, unsigned long int depth) |
0f2d19dd | 746 | { |
302c12b4 DH |
747 | if (SCM_CONSP (form)) |
748 | { | |
749 | SCM tmp = SCM_CAR (form); | |
750 | if (SCM_EQ_P (tmp, scm_sym_quasiquote)) | |
751 | { | |
752 | SCM args = SCM_CDR (form); | |
753 | SCM_ASSYNT (scm_ilength (args) == 1, scm_s_expression, s_quasiquote); | |
754 | return scm_list_2 (tmp, iqq (SCM_CAR (args), env, depth + 1)); | |
755 | } | |
756 | else if (SCM_EQ_P (tmp, scm_sym_unquote)) | |
757 | { | |
758 | SCM args = SCM_CDR (form); | |
759 | SCM_ASSYNT (scm_ilength (args) == 1, scm_s_expression, s_quasiquote); | |
760 | if (depth - 1 == 0) | |
761 | return scm_eval_car (args, env); | |
762 | else | |
763 | return scm_list_2 (tmp, iqq (SCM_CAR (args), env, depth - 1)); | |
764 | } | |
765 | else if (SCM_CONSP (tmp) | |
766 | && SCM_EQ_P (SCM_CAR (tmp), scm_sym_uq_splicing)) | |
767 | { | |
768 | SCM args = SCM_CDR (tmp); | |
769 | SCM_ASSYNT (scm_ilength (args) == 1, scm_s_expression, s_quasiquote); | |
770 | if (depth - 1 == 0) | |
771 | { | |
772 | SCM list = scm_eval_car (args, env); | |
773 | SCM rest = SCM_CDR (form); | |
774 | SCM_ASSYNT (scm_ilength (list) >= 0, s_splicing, s_quasiquote); | |
775 | return scm_append (scm_list_2 (list, iqq (rest, env, depth))); | |
776 | } | |
777 | else | |
778 | return scm_cons (iqq (SCM_CAR (form), env, depth - 1), | |
779 | iqq (SCM_CDR (form), env, depth)); | |
780 | } | |
781 | else | |
782 | return scm_cons (iqq (SCM_CAR (form), env, depth), | |
783 | iqq (SCM_CDR (form), env, depth)); | |
784 | } | |
785 | else if (SCM_VECTORP (form)) | |
0f2d19dd | 786 | { |
302c12b4 | 787 | size_t i = SCM_VECTOR_LENGTH (form); |
34d19ef6 | 788 | SCM const *data = SCM_VELTS (form); |
302c12b4 DH |
789 | SCM tmp = SCM_EOL; |
790 | while (i != 0) | |
791 | tmp = scm_cons (data[--i], tmp); | |
792 | scm_remember_upto_here_1 (form); | |
0f2d19dd JB |
793 | return scm_vector (iqq (tmp, env, depth)); |
794 | } | |
302c12b4 | 795 | else |
ff467021 | 796 | return form; |
0f2d19dd JB |
797 | } |
798 | ||
302c12b4 DH |
799 | SCM |
800 | scm_m_quasiquote (SCM xorig, SCM env) | |
801 | { | |
802 | SCM x = SCM_CDR (xorig); | |
803 | SCM_ASSYNT (scm_ilength (x) == 1, scm_s_expression, s_quasiquote); | |
804 | return iqq (SCM_CAR (x), env, 1); | |
805 | } | |
806 | ||
0f2d19dd | 807 | |
a570e93a MD |
808 | SCM_SYNTAX (s_delay, "delay", scm_makmmacro, scm_m_delay); |
809 | SCM_GLOBAL_SYMBOL (scm_sym_delay, s_delay); | |
1cc91f1b | 810 | |
302c12b4 DH |
811 | /* Promises are implemented as closures with an empty parameter list. Thus, |
812 | * (delay <expression>) is transformed into (#@delay '() <expression>), where | |
813 | * the empty list represents the empty parameter list. This representation | |
814 | * allows for easy creation of the closure during evaluation. */ | |
815 | SCM | |
e81d98ec | 816 | scm_m_delay (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 817 | { |
160bb34a | 818 | SCM_ASSYNT (scm_ilength (xorig) == 2, scm_s_expression, s_delay); |
a570e93a | 819 | return scm_cons2 (SCM_IM_DELAY, SCM_EOL, SCM_CDR (xorig)); |
0f2d19dd JB |
820 | } |
821 | ||
1cc91f1b | 822 | |
b8229a3b | 823 | SCM_SYNTAX(s_define, "define", scm_makmmacro, scm_m_define); |
2f0d1375 | 824 | SCM_GLOBAL_SYMBOL(scm_sym_define, s_define); |
1cc91f1b | 825 | |
302c12b4 DH |
826 | /* Guile provides an extension to R5RS' define syntax to represent function |
827 | * currying in a compact way. With this extension, it is allowed to write | |
828 | * (define <nested-variable> <body>), where <nested-variable> has of one of | |
829 | * the forms (<nested-variable> <formals>), (<nested-variable> . <formal>), | |
830 | * (<variable> <formals>) or (<variable> . <formal>). As in R5RS, <formals> | |
831 | * should be either a sequence of zero or more variables, or a sequence of one | |
832 | * or more variables followed by a space-delimited period and another | |
833 | * variable. Each level of argument nesting wraps the <body> within another | |
834 | * lambda expression. For example, the following forms are allowed, each one | |
835 | * followed by an equivalent, more explicit implementation. | |
836 | * Example 1: | |
837 | * (define ((a b . c) . d) <body>) is equivalent to | |
838 | * (define a (lambda (b . c) (lambda d <body>))) | |
839 | * Example 2: | |
840 | * (define (((a) b) c . d) <body>) is equivalent to | |
841 | * (define a (lambda () (lambda (b) (lambda (c . d) <body>)))) | |
842 | */ | |
843 | /* Dirk:FIXME:: We should provide an implementation for 'define' in the R5RS | |
844 | * module that does not implement this extension. */ | |
845 | SCM | |
6e8d25a6 | 846 | scm_m_define (SCM x, SCM env) |
0f2d19dd | 847 | { |
302c12b4 | 848 | SCM name; |
0f2d19dd | 849 | x = SCM_CDR (x); |
160bb34a | 850 | SCM_ASSYNT (scm_ilength (x) >= 2, scm_s_expression, s_define); |
302c12b4 | 851 | name = SCM_CAR (x); |
0f2d19dd | 852 | x = SCM_CDR (x); |
302c12b4 DH |
853 | while (SCM_CONSP (name)) |
854 | { | |
855 | /* This while loop realizes function currying by variable nesting. */ | |
856 | SCM formals = SCM_CDR (name); | |
857 | x = scm_list_1 (scm_cons2 (scm_sym_lambda, formals, x)); | |
858 | name = SCM_CAR (name); | |
0f2d19dd | 859 | } |
302c12b4 DH |
860 | SCM_ASSYNT (SCM_SYMBOLP (name), scm_s_variable, s_define); |
861 | SCM_ASSYNT (scm_ilength (x) == 1, scm_s_expression, s_define); | |
0f2d19dd JB |
862 | if (SCM_TOP_LEVEL (env)) |
863 | { | |
302c12b4 DH |
864 | SCM var; |
865 | x = scm_eval_car (x, env); | |
866 | if (SCM_REC_PROCNAMES_P) | |
80ea260c | 867 | { |
302c12b4 DH |
868 | SCM tmp = x; |
869 | while (SCM_MACROP (tmp)) | |
870 | tmp = SCM_MACRO_CODE (tmp); | |
871 | if (SCM_CLOSUREP (tmp) | |
80ea260c | 872 | /* Only the first definition determines the name. */ |
302c12b4 DH |
873 | && SCM_FALSEP (scm_procedure_property (tmp, scm_sym_name))) |
874 | scm_set_procedure_property_x (tmp, scm_sym_name, name); | |
80ea260c | 875 | } |
302c12b4 DH |
876 | var = scm_sym2var (name, scm_env_top_level (env), SCM_BOOL_T); |
877 | SCM_VARIABLE_SET (var, x); | |
0f2d19dd | 878 | return SCM_UNSPECIFIED; |
0f2d19dd | 879 | } |
302c12b4 DH |
880 | else |
881 | return scm_cons2 (SCM_IM_DEFINE, name, x); | |
0f2d19dd | 882 | } |
6dbd0af5 | 883 | |
0f2d19dd | 884 | |
302c12b4 DH |
885 | /* The bindings ((v1 i1) (v2 i2) ... (vn in)) are transformed to the lists |
886 | * (vn ... v2 v1) and (i1 i2 ... in). That is, the list of variables is | |
887 | * reversed here, the list of inits gets reversed during evaluation. */ | |
888 | static void | |
889 | transform_bindings (SCM bindings, SCM *rvarloc, SCM *initloc, const char *what) | |
0f2d19dd | 890 | { |
302c12b4 DH |
891 | SCM rvars = SCM_EOL; |
892 | *rvarloc = SCM_EOL; | |
893 | *initloc = SCM_EOL; | |
894 | ||
895 | SCM_ASSYNT (scm_ilength (bindings) >= 1, scm_s_bindings, what); | |
0f2d19dd | 896 | |
0f2d19dd JB |
897 | do |
898 | { | |
302c12b4 DH |
899 | SCM binding = SCM_CAR (bindings); |
900 | SCM_ASSYNT (scm_ilength (binding) == 2, scm_s_bindings, what); | |
901 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (binding)), scm_s_variable, what); | |
902 | if (scm_c_improper_memq (SCM_CAR (binding), rvars)) | |
db4b4ca6 | 903 | scm_misc_error (what, scm_s_duplicate_bindings, SCM_EOL); |
302c12b4 DH |
904 | rvars = scm_cons (SCM_CAR (binding), rvars); |
905 | *initloc = scm_list_1 (SCM_CADR (binding)); | |
a23afe53 | 906 | initloc = SCM_CDRLOC (*initloc); |
302c12b4 | 907 | bindings = SCM_CDR (bindings); |
0f2d19dd | 908 | } |
302c12b4 | 909 | while (!SCM_NULLP (bindings)); |
26d5b9b4 | 910 | |
302c12b4 | 911 | *rvarloc = rvars; |
0f2d19dd JB |
912 | } |
913 | ||
302c12b4 | 914 | |
26d5b9b4 | 915 | SCM_SYNTAX(s_letrec, "letrec", scm_makmmacro, scm_m_letrec); |
2f0d1375 | 916 | SCM_GLOBAL_SYMBOL(scm_sym_letrec, s_letrec); |
26d5b9b4 MD |
917 | |
918 | SCM | |
6e8d25a6 | 919 | scm_m_letrec (SCM xorig, SCM env) |
26d5b9b4 MD |
920 | { |
921 | SCM x = SCM_CDR (xorig); | |
302c12b4 | 922 | SCM_ASSYNT (SCM_CONSP (x), scm_s_bindings, s_letrec); |
26d5b9b4 | 923 | |
302c12b4 DH |
924 | if (SCM_NULLP (SCM_CAR (x))) |
925 | { | |
926 | /* null binding, let* faster */ | |
927 | SCM body = scm_m_body (SCM_IM_LETREC, SCM_CDR (x), s_letrec); | |
928 | return scm_m_letstar (scm_cons2 (SCM_CAR (xorig), SCM_EOL, body), env); | |
929 | } | |
26d5b9b4 | 930 | else |
302c12b4 DH |
931 | { |
932 | SCM rvars, inits, body; | |
933 | transform_bindings (SCM_CAR (x), &rvars, &inits, "letrec"); | |
934 | body = scm_m_body (SCM_IM_LETREC, SCM_CDR (x), "letrec"); | |
935 | return scm_cons2 (SCM_IM_LETREC, rvars, scm_cons (inits, body)); | |
936 | } | |
26d5b9b4 | 937 | } |
1cc91f1b | 938 | |
302c12b4 | 939 | |
b8229a3b | 940 | SCM_SYNTAX(s_let, "let", scm_makmmacro, scm_m_let); |
2f0d1375 | 941 | SCM_GLOBAL_SYMBOL(scm_sym_let, s_let); |
b8229a3b | 942 | |
302c12b4 | 943 | SCM |
6e8d25a6 | 944 | scm_m_let (SCM xorig, SCM env) |
0f2d19dd | 945 | { |
302c12b4 DH |
946 | SCM x = SCM_CDR (xorig); |
947 | SCM temp; | |
948 | ||
949 | SCM_ASSYNT (SCM_CONSP (x), scm_s_bindings, s_let); | |
950 | temp = SCM_CAR (x); | |
951 | if (SCM_NULLP (temp) | |
952 | || (scm_ilength (temp) == 1 && SCM_CONSP (SCM_CAR (temp)))) | |
26d5b9b4 MD |
953 | { |
954 | /* null or single binding, let* is faster */ | |
3096b33f | 955 | SCM bindings = temp; |
302c12b4 | 956 | SCM body = scm_m_body (SCM_IM_LET, SCM_CDR (x), s_let); |
3096b33f | 957 | return scm_m_letstar (scm_cons2 (SCM_CAR (xorig), bindings, body), env); |
26d5b9b4 | 958 | } |
302c12b4 | 959 | else if (SCM_CONSP (temp)) |
26d5b9b4 | 960 | { |
3096b33f DH |
961 | /* plain let */ |
962 | SCM bindings = temp; | |
302c12b4 | 963 | SCM rvars, inits, body; |
3096b33f | 964 | transform_bindings (bindings, &rvars, &inits, "let"); |
302c12b4 DH |
965 | body = scm_m_body (SCM_IM_LET, SCM_CDR (x), "let"); |
966 | return scm_cons2 (SCM_IM_LET, rvars, scm_cons (inits, body)); | |
26d5b9b4 | 967 | } |
302c12b4 DH |
968 | else |
969 | { | |
970 | /* named let: Transform (let name ((var init) ...) body ...) into | |
971 | * ((letrec ((name (lambda (var ...) body ...))) name) init ...) */ | |
26d5b9b4 | 972 | |
302c12b4 DH |
973 | SCM name = temp; |
974 | SCM vars = SCM_EOL; | |
975 | SCM *varloc = &vars; | |
976 | SCM inits = SCM_EOL; | |
977 | SCM *initloc = &inits; | |
978 | SCM bindings; | |
979 | ||
980 | SCM_ASSYNT (SCM_SYMBOLP (name), scm_s_bindings, s_let); | |
981 | x = SCM_CDR (x); | |
982 | SCM_ASSYNT (SCM_CONSP (x), scm_s_bindings, s_let); | |
983 | bindings = SCM_CAR (x); | |
984 | SCM_ASSYNT (scm_ilength (bindings) >= 0, scm_s_bindings, s_let); | |
985 | while (!SCM_NULLP (bindings)) | |
986 | { /* vars and inits both in order */ | |
987 | SCM binding = SCM_CAR (bindings); | |
988 | SCM_ASSYNT (scm_ilength (binding) == 2, scm_s_bindings, s_let); | |
989 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (binding)), scm_s_variable, s_let); | |
990 | *varloc = scm_list_1 (SCM_CAR (binding)); | |
991 | varloc = SCM_CDRLOC (*varloc); | |
992 | *initloc = scm_list_1 (SCM_CADR (binding)); | |
993 | initloc = SCM_CDRLOC (*initloc); | |
994 | bindings = SCM_CDR (bindings); | |
995 | } | |
26d5b9b4 | 996 | |
302c12b4 DH |
997 | { |
998 | SCM lambda_body = scm_m_body (SCM_IM_LET, SCM_CDR (x), "let"); | |
999 | SCM lambda_form = scm_cons2 (scm_sym_lambda, vars, lambda_body); | |
1000 | SCM rvar = scm_list_1 (name); | |
1001 | SCM init = scm_list_1 (lambda_form); | |
1002 | SCM body = scm_m_body (SCM_IM_LET, scm_list_1 (name), "let"); | |
1003 | SCM letrec = scm_cons2 (SCM_IM_LETREC, rvar, scm_cons (init, body)); | |
1004 | return scm_cons (letrec, inits); | |
1005 | } | |
1006 | } | |
0f2d19dd JB |
1007 | } |
1008 | ||
1009 | ||
34d19ef6 | 1010 | SCM_SYNTAX (s_atapply, "@apply", scm_makmmacro, scm_m_apply); |
81123e6d MD |
1011 | SCM_GLOBAL_SYMBOL (scm_sym_atapply, s_atapply); |
1012 | SCM_GLOBAL_SYMBOL (scm_sym_apply, s_atapply + 1); | |
1cc91f1b | 1013 | |
0f2d19dd | 1014 | SCM |
e81d98ec | 1015 | scm_m_apply (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 1016 | { |
160bb34a | 1017 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 2, scm_s_expression, s_atapply); |
0f2d19dd JB |
1018 | return scm_cons (SCM_IM_APPLY, SCM_CDR (xorig)); |
1019 | } | |
1020 | ||
b8229a3b | 1021 | |
34d19ef6 HWN |
1022 | SCM_SYNTAX(s_atcall_cc, "@call-with-current-continuation", scm_makmmacro, scm_m_cont); |
1023 | SCM_GLOBAL_SYMBOL(scm_sym_atcall_cc, s_atcall_cc); | |
0f2d19dd | 1024 | |
1cc91f1b | 1025 | |
0f2d19dd | 1026 | SCM |
e81d98ec | 1027 | scm_m_cont (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 1028 | { |
6cb702da | 1029 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, |
160bb34a | 1030 | scm_s_expression, s_atcall_cc); |
3a3111a8 | 1031 | return scm_cons (SCM_IM_CONT, SCM_CDR (xorig)); |
0f2d19dd JB |
1032 | } |
1033 | ||
c96d76b8 | 1034 | #ifdef SCM_ENABLE_ELISP |
73b64342 MD |
1035 | |
1036 | SCM_SYNTAX (s_nil_cond, "nil-cond", scm_makmmacro, scm_m_nil_cond); | |
1037 | ||
1038 | SCM | |
e81d98ec | 1039 | scm_m_nil_cond (SCM xorig, SCM env SCM_UNUSED) |
73b64342 | 1040 | { |
c014a02e | 1041 | long len = scm_ilength (SCM_CDR (xorig)); |
160bb34a | 1042 | SCM_ASSYNT (len >= 1 && (len & 1) == 1, scm_s_expression, "nil-cond"); |
73b64342 MD |
1043 | return scm_cons (SCM_IM_NIL_COND, SCM_CDR (xorig)); |
1044 | } | |
1045 | ||
73b64342 MD |
1046 | SCM_SYNTAX (s_atfop, "@fop", scm_makmmacro, scm_m_atfop); |
1047 | ||
1048 | SCM | |
e81d98ec | 1049 | scm_m_atfop (SCM xorig, SCM env SCM_UNUSED) |
73b64342 | 1050 | { |
86d31dfe | 1051 | SCM x = SCM_CDR (xorig), var; |
160bb34a | 1052 | SCM_ASSYNT (scm_ilength (x) >= 1, scm_s_expression, "@fop"); |
86d31dfe | 1053 | var = scm_symbol_fref (SCM_CAR (x)); |
c96d76b8 NJ |
1054 | /* Passing the symbol name as the `subr' arg here isn't really |
1055 | right, but without it it can be very difficult to work out from | |
1056 | the error message which function definition was missing. In any | |
1057 | case, we shouldn't really use SCM_ASSYNT here at all, but instead | |
1058 | something equivalent to (signal void-function (list SYM)) in | |
1059 | Elisp. */ | |
86d31dfe | 1060 | SCM_ASSYNT (SCM_VARIABLEP (var), |
c96d76b8 NJ |
1061 | "Symbol's function definition is void", |
1062 | SCM_SYMBOL_CHARS (SCM_CAR (x))); | |
1063 | /* Support `defalias'. */ | |
1064 | while (SCM_SYMBOLP (SCM_VARIABLE_REF (var))) | |
1065 | { | |
1066 | var = scm_symbol_fref (SCM_VARIABLE_REF (var)); | |
1067 | SCM_ASSYNT (SCM_VARIABLEP (var), | |
1068 | "Symbol's function definition is void", | |
1069 | SCM_SYMBOL_CHARS (SCM_CAR (x))); | |
1070 | } | |
1071 | /* Use `var' here rather than `SCM_VARIABLE_REF (var)' because the | |
1072 | former allows for automatically picking up redefinitions of the | |
1073 | corresponding symbol. */ | |
904a077d | 1074 | SCM_SETCAR (x, var); |
c96d76b8 NJ |
1075 | /* If the variable contains a procedure, leave the |
1076 | `transformer-macro' in place so that the procedure's arguments | |
1077 | get properly transformed, and change the initial @fop to | |
1078 | SCM_IM_APPLY. */ | |
1079 | if (!SCM_MACROP (SCM_VARIABLE_REF (var))) | |
1080 | { | |
1081 | SCM_SETCAR (xorig, SCM_IM_APPLY); | |
1082 | return xorig; | |
1083 | } | |
1084 | /* Otherwise (the variable contains a macro), the arguments should | |
1085 | not be transformed, so cut the `transformer-macro' out and return | |
1086 | the resulting expression starting with the variable. */ | |
1087 | SCM_SETCDR (x, SCM_CDADR (x)); | |
73b64342 MD |
1088 | return x; |
1089 | } | |
1090 | ||
c96d76b8 NJ |
1091 | #endif /* SCM_ENABLE_ELISP */ |
1092 | ||
2e171178 MV |
1093 | /* (@bind ((var exp) ...) body ...) |
1094 | ||
1095 | This will assign the values of the `exp's to the global variables | |
1096 | named by `var's (symbols, not evaluated), creating them if they | |
1097 | don't exist, executes body, and then restores the previous values of | |
1098 | the `var's. Additionally, whenever control leaves body, the values | |
1099 | of the `var's are saved and restored when control returns. It is an | |
1100 | error when a symbol appears more than once among the `var's. | |
1101 | All `exp's are evaluated before any `var' is set. | |
1102 | ||
c96d76b8 | 1103 | Think of this as `let' for dynamic scope. |
2e171178 MV |
1104 | |
1105 | It is memoized into (#@bind ((var ...) . (reversed-val ...)) body ...). | |
1106 | ||
1107 | XXX - also implement `@bind*'. | |
1108 | */ | |
1109 | ||
73b64342 MD |
1110 | SCM_SYNTAX (s_atbind, "@bind", scm_makmmacro, scm_m_atbind); |
1111 | ||
1112 | SCM | |
1113 | scm_m_atbind (SCM xorig, SCM env) | |
1114 | { | |
1115 | SCM x = SCM_CDR (xorig); | |
2e171178 | 1116 | SCM top_level = scm_env_top_level (env); |
311f6782 | 1117 | SCM vars = SCM_EOL, var; |
2e171178 MV |
1118 | SCM exps = SCM_EOL; |
1119 | ||
1120 | SCM_ASSYNT (scm_ilength (x) > 1, scm_s_expression, s_atbind); | |
73b64342 | 1121 | |
73b64342 MD |
1122 | x = SCM_CAR (x); |
1123 | while (SCM_NIMP (x)) | |
1124 | { | |
2e171178 MV |
1125 | SCM rest; |
1126 | SCM sym_exp = SCM_CAR (x); | |
1127 | SCM_ASSYNT (scm_ilength (sym_exp) == 2, scm_s_bindings, s_atbind); | |
1128 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (sym_exp)), scm_s_bindings, s_atbind); | |
73b64342 | 1129 | x = SCM_CDR (x); |
2e171178 | 1130 | for (rest = x; SCM_NIMP (rest); rest = SCM_CDR (rest)) |
8ea46249 | 1131 | if (SCM_EQ_P (SCM_CAR (sym_exp), SCM_CAAR (rest))) |
2e171178 | 1132 | scm_misc_error (s_atbind, scm_s_duplicate_bindings, SCM_EOL); |
311f6782 MV |
1133 | /* The first call to scm_sym2var will look beyond the current |
1134 | module, while the second call wont. */ | |
1135 | var = scm_sym2var (SCM_CAR (sym_exp), top_level, SCM_BOOL_F); | |
1136 | if (SCM_FALSEP (var)) | |
1137 | var = scm_sym2var (SCM_CAR (sym_exp), top_level, SCM_BOOL_T); | |
1138 | vars = scm_cons (var, vars); | |
2e171178 | 1139 | exps = scm_cons (SCM_CADR (sym_exp), exps); |
73b64342 | 1140 | } |
2e171178 MV |
1141 | return scm_cons (SCM_IM_BIND, |
1142 | scm_cons (scm_cons (scm_reverse_x (vars, SCM_EOL), exps), | |
1143 | SCM_CDDR (xorig))); | |
73b64342 | 1144 | } |
73b64342 | 1145 | |
a513ead3 MV |
1146 | SCM_SYNTAX (s_at_call_with_values, "@call-with-values", scm_makmmacro, scm_m_at_call_with_values); |
1147 | SCM_GLOBAL_SYMBOL(scm_sym_at_call_with_values, s_at_call_with_values); | |
1148 | ||
1149 | SCM | |
e81d98ec | 1150 | scm_m_at_call_with_values (SCM xorig, SCM env SCM_UNUSED) |
a513ead3 MV |
1151 | { |
1152 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 2, | |
1153 | scm_s_expression, s_at_call_with_values); | |
1154 | return scm_cons (SCM_IM_CALL_WITH_VALUES, SCM_CDR (xorig)); | |
1155 | } | |
1156 | ||
26d5b9b4 MD |
1157 | SCM |
1158 | scm_m_expand_body (SCM xorig, SCM env) | |
1159 | { | |
22a52da1 | 1160 | SCM x = SCM_CDR (xorig), defs = SCM_EOL; |
26d5b9b4 MD |
1161 | char *what = SCM_ISYMCHARS (SCM_CAR (xorig)) + 2; |
1162 | ||
1163 | while (SCM_NIMP (x)) | |
1164 | { | |
22a52da1 DH |
1165 | SCM form = SCM_CAR (x); |
1166 | if (!SCM_CONSP (form)) | |
26d5b9b4 MD |
1167 | break; |
1168 | if (!SCM_SYMBOLP (SCM_CAR (form))) | |
1169 | break; | |
22a52da1 | 1170 | |
3a3111a8 MD |
1171 | form = scm_macroexp (scm_cons_source (form, |
1172 | SCM_CAR (form), | |
1173 | SCM_CDR (form)), | |
1174 | env); | |
26d5b9b4 | 1175 | |
cf498326 | 1176 | if (SCM_EQ_P (SCM_IM_DEFINE, SCM_CAR (form))) |
26d5b9b4 MD |
1177 | { |
1178 | defs = scm_cons (SCM_CDR (form), defs); | |
22a52da1 | 1179 | x = SCM_CDR (x); |
26d5b9b4 | 1180 | } |
22a52da1 | 1181 | else if (!SCM_IMP (defs)) |
26d5b9b4 MD |
1182 | { |
1183 | break; | |
1184 | } | |
cf498326 | 1185 | else if (SCM_EQ_P (SCM_IM_BEGIN, SCM_CAR (form))) |
26d5b9b4 | 1186 | { |
8ea46249 | 1187 | x = scm_append (scm_list_2 (SCM_CDR (form), SCM_CDR (x))); |
26d5b9b4 MD |
1188 | } |
1189 | else | |
1190 | { | |
22a52da1 | 1191 | x = scm_cons (form, SCM_CDR (x)); |
26d5b9b4 MD |
1192 | break; |
1193 | } | |
1194 | } | |
1195 | ||
302c12b4 | 1196 | if (!SCM_NULLP (defs)) |
26d5b9b4 | 1197 | { |
302c12b4 DH |
1198 | SCM rvars, inits, body, letrec; |
1199 | transform_bindings (defs, &rvars, &inits, what); | |
1200 | body = scm_m_body (SCM_IM_DEFINE, x, what); | |
1201 | letrec = scm_cons2 (SCM_IM_LETREC, rvars, scm_cons (inits, body)); | |
1202 | SCM_SETCAR (xorig, letrec); | |
1203 | SCM_SETCDR (xorig, SCM_EOL); | |
1204 | } | |
1205 | else | |
1206 | { | |
1207 | SCM_ASSYNT (SCM_CONSP (x), scm_s_body, what); | |
1208 | SCM_SETCAR (xorig, SCM_CAR (x)); | |
1209 | SCM_SETCDR (xorig, SCM_CDR (x)); | |
26d5b9b4 | 1210 | } |
26d5b9b4 MD |
1211 | |
1212 | return xorig; | |
1213 | } | |
1214 | ||
1215 | SCM | |
1216 | scm_macroexp (SCM x, SCM env) | |
1217 | { | |
86d31dfe | 1218 | SCM res, proc, orig_sym; |
26d5b9b4 MD |
1219 | |
1220 | /* Don't bother to produce error messages here. We get them when we | |
1221 | eventually execute the code for real. */ | |
1222 | ||
1223 | macro_tail: | |
86d31dfe MV |
1224 | orig_sym = SCM_CAR (x); |
1225 | if (!SCM_SYMBOLP (orig_sym)) | |
26d5b9b4 MD |
1226 | return x; |
1227 | ||
26d5b9b4 MD |
1228 | { |
1229 | SCM *proc_ptr = scm_lookupcar1 (x, env, 0); | |
1230 | if (proc_ptr == NULL) | |
1231 | { | |
1232 | /* We have lost the race. */ | |
1233 | goto macro_tail; | |
1234 | } | |
1235 | proc = *proc_ptr; | |
1236 | } | |
26d5b9b4 MD |
1237 | |
1238 | /* Only handle memoizing macros. `Acros' and `macros' are really | |
1239 | special forms and should not be evaluated here. */ | |
1240 | ||
22a52da1 | 1241 | if (!SCM_MACROP (proc) || SCM_MACRO_TYPE (proc) != 2) |
26d5b9b4 MD |
1242 | return x; |
1243 | ||
86d31dfe | 1244 | SCM_SETCAR (x, orig_sym); /* Undo memoizing effect of lookupcar */ |
fdc28395 | 1245 | res = scm_call_2 (SCM_MACRO_CODE (proc), x, env); |
26d5b9b4 MD |
1246 | |
1247 | if (scm_ilength (res) <= 0) | |
8ea46249 | 1248 | res = scm_list_2 (SCM_IM_BEGIN, res); |
26d5b9b4 | 1249 | |
26d5b9b4 MD |
1250 | SCM_DEFER_INTS; |
1251 | SCM_SETCAR (x, SCM_CAR (res)); | |
1252 | SCM_SETCDR (x, SCM_CDR (res)); | |
1253 | SCM_ALLOW_INTS; | |
1254 | ||
1255 | goto macro_tail; | |
1256 | } | |
73b64342 | 1257 | |
6dbd0af5 MD |
1258 | /* scm_unmemocopy takes a memoized expression together with its |
1259 | * environment and rewrites it to its original form. Thus, it is the | |
1260 | * inversion of the rewrite rules above. The procedure is not | |
1261 | * optimized for speed. It's used in scm_iprin1 when printing the | |
220ff1eb MD |
1262 | * code of a closure, in scm_procedure_source, in display_frame when |
1263 | * generating the source for a stackframe in a backtrace, and in | |
1264 | * display_expression. | |
86d31dfe | 1265 | * |
c96d76b8 | 1266 | * Unmemoizing is not a reliable process. You cannot in general |
86d31dfe MV |
1267 | * expect to get the original source back. |
1268 | * | |
1269 | * However, GOOPS currently relies on this for method compilation. | |
1270 | * This ought to change. | |
26d5b9b4 MD |
1271 | */ |
1272 | ||
f1267706 | 1273 | #define SCM_BIT8(x) (127 & SCM_UNPACK (x)) |
c209c88e | 1274 | |
8ea46249 DH |
1275 | static SCM |
1276 | build_binding_list (SCM names, SCM inits) | |
1277 | { | |
1278 | SCM bindings = SCM_EOL; | |
1279 | while (!SCM_NULLP (names)) | |
1280 | { | |
1281 | SCM binding = scm_list_2 (SCM_CAR (names), SCM_CAR (inits)); | |
1282 | bindings = scm_cons (binding, bindings); | |
1283 | names = SCM_CDR (names); | |
1284 | inits = SCM_CDR (inits); | |
1285 | } | |
1286 | return bindings; | |
1287 | } | |
1288 | ||
6dbd0af5 | 1289 | static SCM |
1bbd0b84 | 1290 | unmemocopy (SCM x, SCM env) |
6dbd0af5 MD |
1291 | { |
1292 | SCM ls, z; | |
1293 | #ifdef DEBUG_EXTENSIONS | |
1294 | SCM p; | |
1295 | #endif | |
8c494e99 | 1296 | if (!SCM_CONSP (x)) |
6dbd0af5 MD |
1297 | return x; |
1298 | #ifdef DEBUG_EXTENSIONS | |
1299 | p = scm_whash_lookup (scm_source_whash, x); | |
1300 | #endif | |
8ea46249 | 1301 | switch (SCM_ITAG7 (SCM_CAR (x))) |
6dbd0af5 | 1302 | { |
c209c88e | 1303 | case SCM_BIT8(SCM_IM_AND): |
2f0d1375 | 1304 | ls = z = scm_cons (scm_sym_and, SCM_UNSPECIFIED); |
6dbd0af5 | 1305 | break; |
c209c88e | 1306 | case SCM_BIT8(SCM_IM_BEGIN): |
2f0d1375 | 1307 | ls = z = scm_cons (scm_sym_begin, SCM_UNSPECIFIED); |
6dbd0af5 | 1308 | break; |
c209c88e | 1309 | case SCM_BIT8(SCM_IM_CASE): |
2f0d1375 | 1310 | ls = z = scm_cons (scm_sym_case, SCM_UNSPECIFIED); |
6dbd0af5 | 1311 | break; |
c209c88e | 1312 | case SCM_BIT8(SCM_IM_COND): |
2f0d1375 | 1313 | ls = z = scm_cons (scm_sym_cond, SCM_UNSPECIFIED); |
6dbd0af5 | 1314 | break; |
8ea46249 | 1315 | case SCM_BIT8 (SCM_IM_DO): |
6dbd0af5 | 1316 | { |
8ea46249 DH |
1317 | /* format: (#@do (nk nk-1 ...) (i1 ... ik) (test) (body) s1 ... sk), |
1318 | * where nx is the name of a local variable, ix is an initializer for | |
1319 | * the local variable, test is the test clause of the do loop, body is | |
1320 | * the body of the do loop and sx are the step clauses for the local | |
1321 | * variables. */ | |
1322 | SCM names, inits, test, memoized_body, steps, bindings; | |
1323 | ||
1324 | x = SCM_CDR (x); | |
1325 | names = SCM_CAR (x); | |
6dbd0af5 | 1326 | x = SCM_CDR (x); |
8ea46249 DH |
1327 | inits = scm_reverse (unmemocopy (SCM_CAR (x), env)); |
1328 | env = EXTEND_ENV (names, SCM_EOL, env); | |
6dbd0af5 | 1329 | x = SCM_CDR (x); |
8ea46249 DH |
1330 | test = unmemocopy (SCM_CAR (x), env); |
1331 | x = SCM_CDR (x); | |
1332 | memoized_body = SCM_CAR (x); | |
1333 | x = SCM_CDR (x); | |
1334 | steps = scm_reverse (unmemocopy (x, env)); | |
1335 | ||
26d5b9b4 | 1336 | /* build transformed binding list */ |
8ea46249 DH |
1337 | bindings = SCM_EOL; |
1338 | while (!SCM_NULLP (names)) | |
6dbd0af5 | 1339 | { |
8ea46249 DH |
1340 | SCM name = SCM_CAR (names); |
1341 | SCM init = SCM_CAR (inits); | |
1342 | SCM step = SCM_CAR (steps); | |
1343 | step = SCM_EQ_P (step, name) ? SCM_EOL : scm_list_1 (step); | |
1344 | ||
1345 | bindings = scm_cons (scm_cons2 (name, init, step), bindings); | |
1346 | ||
1347 | names = SCM_CDR (names); | |
1348 | inits = SCM_CDR (inits); | |
1349 | steps = SCM_CDR (steps); | |
6dbd0af5 | 1350 | } |
8ea46249 DH |
1351 | z = scm_cons (test, SCM_UNSPECIFIED); |
1352 | ls = scm_cons2 (scm_sym_do, bindings, z); | |
1353 | ||
1354 | x = scm_cons (SCM_BOOL_F, memoized_body); | |
1355 | break; | |
1356 | } | |
1357 | case SCM_BIT8(SCM_IM_IF): | |
1358 | ls = z = scm_cons (scm_sym_if, SCM_UNSPECIFIED); | |
1359 | break; | |
1360 | case SCM_BIT8 (SCM_IM_LET): | |
1361 | { | |
1362 | /* format: (#@let (nk nk-1 ...) (i1 ... ik) b1 ...), | |
1363 | * where nx is the name of a local variable, ix is an initializer for | |
1364 | * the local variable and by are the body clauses. */ | |
1365 | SCM names, inits, bindings; | |
1366 | ||
1367 | x = SCM_CDR (x); | |
1368 | names = SCM_CAR (x); | |
1369 | x = SCM_CDR (x); | |
1370 | inits = scm_reverse (unmemocopy (SCM_CAR (x), env)); | |
1371 | env = EXTEND_ENV (names, SCM_EOL, env); | |
1372 | ||
1373 | bindings = build_binding_list (names, inits); | |
1374 | z = scm_cons (bindings, SCM_UNSPECIFIED); | |
1375 | ls = scm_cons (scm_sym_let, z); | |
1376 | break; | |
1377 | } | |
1378 | case SCM_BIT8 (SCM_IM_LETREC): | |
1379 | { | |
1380 | /* format: (#@letrec (nk nk-1 ...) (i1 ... ik) b1 ...), | |
1381 | * where nx is the name of a local variable, ix is an initializer for | |
1382 | * the local variable and by are the body clauses. */ | |
1383 | SCM names, inits, bindings; | |
1384 | ||
1385 | x = SCM_CDR (x); | |
1386 | names = SCM_CAR (x); | |
1387 | env = EXTEND_ENV (names, SCM_EOL, env); | |
1388 | x = SCM_CDR (x); | |
1389 | inits = scm_reverse (unmemocopy (SCM_CAR (x), env)); | |
1390 | ||
1391 | bindings = build_binding_list (names, inits); | |
1392 | z = scm_cons (bindings, SCM_UNSPECIFIED); | |
1393 | ls = scm_cons (scm_sym_letrec, z); | |
6dbd0af5 MD |
1394 | break; |
1395 | } | |
c209c88e | 1396 | case SCM_BIT8(SCM_IM_LETSTAR): |
6dbd0af5 MD |
1397 | { |
1398 | SCM b, y; | |
1399 | x = SCM_CDR (x); | |
1400 | b = SCM_CAR (x); | |
1401 | y = SCM_EOL; | |
1402 | if SCM_IMP (b) | |
1403 | { | |
e2806c10 | 1404 | env = EXTEND_ENV (SCM_EOL, SCM_EOL, env); |
6dbd0af5 MD |
1405 | goto letstar; |
1406 | } | |
1407 | y = z = scm_acons (SCM_CAR (b), | |
1408 | unmemocar ( | |
8ea46249 | 1409 | scm_cons (unmemocopy (SCM_CADR (b), env), SCM_EOL), env), |
6dbd0af5 | 1410 | SCM_UNSPECIFIED); |
e2806c10 | 1411 | env = EXTEND_ENV (SCM_CAR (b), SCM_BOOL_F, env); |
8ea46249 | 1412 | b = SCM_CDDR (b); |
6dbd0af5 MD |
1413 | if (SCM_IMP (b)) |
1414 | { | |
1415 | SCM_SETCDR (y, SCM_EOL); | |
2f0d1375 | 1416 | ls = scm_cons (scm_sym_let, z = scm_cons (y, SCM_UNSPECIFIED)); |
6dbd0af5 MD |
1417 | break; |
1418 | } | |
1419 | do | |
1420 | { | |
a23afe53 MD |
1421 | SCM_SETCDR (z, scm_acons (SCM_CAR (b), |
1422 | unmemocar ( | |
8ea46249 | 1423 | scm_list_1 (unmemocopy (SCM_CADR (b), env)), env), |
a23afe53 MD |
1424 | SCM_UNSPECIFIED)); |
1425 | z = SCM_CDR (z); | |
e2806c10 | 1426 | env = EXTEND_ENV (SCM_CAR (b), SCM_BOOL_F, env); |
8ea46249 | 1427 | b = SCM_CDDR (b); |
6dbd0af5 | 1428 | } |
ff467021 | 1429 | while (SCM_NIMP (b)); |
a23afe53 | 1430 | SCM_SETCDR (z, SCM_EOL); |
6dbd0af5 | 1431 | letstar: |
2f0d1375 | 1432 | ls = scm_cons (scm_sym_letstar, z = scm_cons (y, SCM_UNSPECIFIED)); |
6dbd0af5 MD |
1433 | break; |
1434 | } | |
c209c88e | 1435 | case SCM_BIT8(SCM_IM_OR): |
2f0d1375 | 1436 | ls = z = scm_cons (scm_sym_or, SCM_UNSPECIFIED); |
6dbd0af5 | 1437 | break; |
c209c88e | 1438 | case SCM_BIT8(SCM_IM_LAMBDA): |
6dbd0af5 | 1439 | x = SCM_CDR (x); |
8ea46249 DH |
1440 | z = scm_cons (SCM_CAR (x), SCM_UNSPECIFIED); |
1441 | ls = scm_cons (scm_sym_lambda, z); | |
e2806c10 | 1442 | env = EXTEND_ENV (SCM_CAR (x), SCM_EOL, env); |
6dbd0af5 | 1443 | break; |
c209c88e | 1444 | case SCM_BIT8(SCM_IM_QUOTE): |
2f0d1375 | 1445 | ls = z = scm_cons (scm_sym_quote, SCM_UNSPECIFIED); |
6dbd0af5 | 1446 | break; |
c209c88e | 1447 | case SCM_BIT8(SCM_IM_SET_X): |
89efbff4 | 1448 | ls = z = scm_cons (scm_sym_set_x, SCM_UNSPECIFIED); |
6dbd0af5 | 1449 | break; |
c209c88e | 1450 | case SCM_BIT8(SCM_IM_DEFINE): |
6dbd0af5 MD |
1451 | { |
1452 | SCM n; | |
1453 | x = SCM_CDR (x); | |
8ea46249 DH |
1454 | n = SCM_CAR (x); |
1455 | z = scm_cons (n, SCM_UNSPECIFIED); | |
1456 | ls = scm_cons (scm_sym_define, z); | |
01f11e02 | 1457 | if (!SCM_NULLP (env)) |
4c5f8e8f NJ |
1458 | env = scm_cons (scm_cons (scm_cons (n, SCM_CAAR (env)), |
1459 | SCM_CDAR (env)), | |
1460 | SCM_CDR (env)); | |
6dbd0af5 MD |
1461 | break; |
1462 | } | |
c209c88e | 1463 | case SCM_BIT8(SCM_MAKISYM (0)): |
6dbd0af5 MD |
1464 | z = SCM_CAR (x); |
1465 | if (!SCM_ISYMP (z)) | |
1466 | goto unmemo; | |
ff467021 | 1467 | switch (SCM_ISYMNUM (z)) |
6dbd0af5 MD |
1468 | { |
1469 | case (SCM_ISYMNUM (SCM_IM_APPLY)): | |
2f0d1375 | 1470 | ls = z = scm_cons (scm_sym_atapply, SCM_UNSPECIFIED); |
6dbd0af5 MD |
1471 | goto loop; |
1472 | case (SCM_ISYMNUM (SCM_IM_CONT)): | |
2f0d1375 | 1473 | ls = z = scm_cons (scm_sym_atcall_cc, SCM_UNSPECIFIED); |
6dbd0af5 | 1474 | goto loop; |
a570e93a MD |
1475 | case (SCM_ISYMNUM (SCM_IM_DELAY)): |
1476 | ls = z = scm_cons (scm_sym_delay, SCM_UNSPECIFIED); | |
1477 | x = SCM_CDR (x); | |
1478 | goto loop; | |
a513ead3 MV |
1479 | case (SCM_ISYMNUM (SCM_IM_CALL_WITH_VALUES)): |
1480 | ls = z = scm_cons (scm_sym_at_call_with_values, SCM_UNSPECIFIED); | |
1481 | goto loop; | |
6dbd0af5 | 1482 | default: |
fa888178 | 1483 | /* appease the Sun compiler god: */ ; |
6dbd0af5 MD |
1484 | } |
1485 | unmemo: | |
1486 | default: | |
1487 | ls = z = unmemocar (scm_cons (unmemocopy (SCM_CAR (x), env), | |
1488 | SCM_UNSPECIFIED), | |
1489 | env); | |
1490 | } | |
1491 | loop: | |
8c494e99 DH |
1492 | x = SCM_CDR (x); |
1493 | while (SCM_CONSP (x)) | |
a23afe53 | 1494 | { |
8c494e99 DH |
1495 | SCM form = SCM_CAR (x); |
1496 | if (!SCM_ISYMP (form)) | |
1497 | { | |
1498 | SCM copy = scm_cons (unmemocopy (form, env), SCM_UNSPECIFIED); | |
1499 | SCM_SETCDR (z, unmemocar (copy, env)); | |
1500 | z = SCM_CDR (z); | |
1501 | } | |
1502 | x = SCM_CDR (x); | |
a23afe53 MD |
1503 | } |
1504 | SCM_SETCDR (z, x); | |
6dbd0af5 | 1505 | #ifdef DEBUG_EXTENSIONS |
01f11e02 | 1506 | if (!SCM_FALSEP (p)) |
6dbd0af5 MD |
1507 | scm_whash_insert (scm_source_whash, ls, p); |
1508 | #endif | |
1509 | return ls; | |
1510 | } | |
1511 | ||
1cc91f1b | 1512 | |
6dbd0af5 | 1513 | SCM |
6e8d25a6 | 1514 | scm_unmemocopy (SCM x, SCM env) |
6dbd0af5 | 1515 | { |
01f11e02 | 1516 | if (!SCM_NULLP (env)) |
6dbd0af5 MD |
1517 | /* Make a copy of the lowest frame to protect it from |
1518 | modifications by SCM_IM_DEFINE */ | |
1519 | return unmemocopy (x, scm_cons (SCM_CAR (env), SCM_CDR (env))); | |
1520 | else | |
1521 | return unmemocopy (x, env); | |
1522 | } | |
1523 | ||
1cc91f1b | 1524 | |
0f2d19dd | 1525 | int |
6e8d25a6 | 1526 | scm_badargsp (SCM formals, SCM args) |
0f2d19dd | 1527 | { |
6a0f6ff3 | 1528 | while (!SCM_NULLP (formals)) |
0f2d19dd | 1529 | { |
01f11e02 | 1530 | if (!SCM_CONSP (formals)) |
ff467021 | 1531 | return 0; |
6a0f6ff3 | 1532 | if (SCM_NULLP (args)) |
ff467021 | 1533 | return 1; |
0f2d19dd JB |
1534 | formals = SCM_CDR (formals); |
1535 | args = SCM_CDR (args); | |
1536 | } | |
01f11e02 | 1537 | return !SCM_NULLP (args) ? 1 : 0; |
0f2d19dd | 1538 | } |
a392ee15 | 1539 | |
0f2d19dd | 1540 | |
002f1a5d MD |
1541 | static int |
1542 | scm_badformalsp (SCM closure, int n) | |
1543 | { | |
726d810a DH |
1544 | SCM formals = SCM_CLOSURE_FORMALS (closure); |
1545 | while (!SCM_NULLP (formals)) | |
002f1a5d | 1546 | { |
726d810a | 1547 | if (!SCM_CONSP (formals)) |
002f1a5d MD |
1548 | return 0; |
1549 | if (n == 0) | |
1550 | return 1; | |
1551 | --n; | |
1552 | formals = SCM_CDR (formals); | |
1553 | } | |
1554 | return n; | |
1555 | } | |
0f2d19dd JB |
1556 | |
1557 | \f | |
6dbd0af5 | 1558 | SCM |
6e8d25a6 | 1559 | scm_eval_args (SCM l, SCM env, SCM proc) |
6dbd0af5 | 1560 | { |
680ed4a8 | 1561 | SCM results = SCM_EOL, *lloc = &results, res; |
904a077d | 1562 | while (SCM_CONSP (l)) |
6dbd0af5 | 1563 | { |
680ed4a8 | 1564 | res = EVALCAR (l, env); |
904a077d | 1565 | |
8ea46249 | 1566 | *lloc = scm_list_1 (res); |
a23afe53 | 1567 | lloc = SCM_CDRLOC (*lloc); |
6dbd0af5 MD |
1568 | l = SCM_CDR (l); |
1569 | } | |
22a52da1 | 1570 | if (!SCM_NULLP (l)) |
904a077d | 1571 | scm_wrong_num_args (proc); |
680ed4a8 | 1572 | return results; |
6dbd0af5 | 1573 | } |
c4ac4d88 | 1574 | |
9de33deb MD |
1575 | SCM |
1576 | scm_eval_body (SCM code, SCM env) | |
1577 | { | |
1578 | SCM next; | |
1579 | again: | |
01f11e02 DH |
1580 | next = SCM_CDR (code); |
1581 | while (!SCM_NULLP (next)) | |
9de33deb MD |
1582 | { |
1583 | if (SCM_IMP (SCM_CAR (code))) | |
1584 | { | |
1585 | if (SCM_ISYMP (SCM_CAR (code))) | |
1586 | { | |
9bc4701c MD |
1587 | SOURCE_SECTION_START; |
1588 | /* check for race condition */ | |
1589 | if (SCM_ISYMP (SCM_CAR (code))) | |
1590 | code = scm_m_expand_body (code, env); | |
1591 | SOURCE_SECTION_END; | |
9de33deb MD |
1592 | goto again; |
1593 | } | |
1594 | } | |
1595 | else | |
1596 | SCM_XEVAL (SCM_CAR (code), env); | |
1597 | code = next; | |
01f11e02 | 1598 | next = SCM_CDR (code); |
9de33deb MD |
1599 | } |
1600 | return SCM_XEVALCAR (code, env); | |
1601 | } | |
1602 | ||
c4ac4d88 | 1603 | |
0f2d19dd JB |
1604 | #endif /* !DEVAL */ |
1605 | ||
6dbd0af5 MD |
1606 | |
1607 | /* SECTION: This code is specific for the debugging support. One | |
1608 | * branch is read when DEVAL isn't defined, the other when DEVAL is | |
1609 | * defined. | |
1610 | */ | |
1611 | ||
1612 | #ifndef DEVAL | |
1613 | ||
1614 | #define SCM_APPLY scm_apply | |
1615 | #define PREP_APPLY(proc, args) | |
1616 | #define ENTER_APPLY | |
ddea3325 | 1617 | #define RETURN(x) do { return x; } while (0) |
b7ff98dd MD |
1618 | #ifdef STACK_CHECKING |
1619 | #ifndef NO_CEVAL_STACK_CHECKING | |
1620 | #define EVAL_STACK_CHECKING | |
1621 | #endif | |
6dbd0af5 MD |
1622 | #endif |
1623 | ||
1624 | #else /* !DEVAL */ | |
1625 | ||
0f2d19dd JB |
1626 | #undef SCM_CEVAL |
1627 | #define SCM_CEVAL scm_deval /* Substitute all uses of scm_ceval */ | |
1628 | #undef SCM_APPLY | |
1629 | #define SCM_APPLY scm_dapply | |
6dbd0af5 MD |
1630 | #undef PREP_APPLY |
1631 | #define PREP_APPLY(p, l) \ | |
1632 | { ++debug.info; debug.info->a.proc = p; debug.info->a.args = l; } | |
1633 | #undef ENTER_APPLY | |
1634 | #define ENTER_APPLY \ | |
d3a6bc94 | 1635 | do { \ |
b7ff98dd | 1636 | SCM_SET_ARGSREADY (debug);\ |
5132eef0 | 1637 | if (scm_check_apply_p && SCM_TRAPS_P)\ |
b7ff98dd | 1638 | if (SCM_APPLY_FRAME_P || (SCM_TRACE_P && PROCTRACEP (proc)))\ |
6dbd0af5 | 1639 | {\ |
156dcb09 | 1640 | SCM tmp, tail = SCM_BOOL(SCM_TRACED_FRAME_P (debug)); \ |
c6a4fbce | 1641 | SCM_SET_TRACED_FRAME (debug); \ |
d95c0b76 | 1642 | SCM_TRAPS_P = 0;\ |
b7ff98dd | 1643 | if (SCM_CHEAPTRAPS_P)\ |
6dbd0af5 | 1644 | {\ |
c0ab1b8d | 1645 | tmp = scm_make_debugobj (&debug);\ |
d95c0b76 | 1646 | scm_call_3 (SCM_APPLY_FRAME_HDLR, scm_sym_apply_frame, tmp, tail);\ |
b6d75948 | 1647 | }\ |
6dbd0af5 MD |
1648 | else\ |
1649 | {\ | |
5f144b10 GH |
1650 | int first;\ |
1651 | tmp = scm_make_continuation (&first);\ | |
1652 | if (first)\ | |
d95c0b76 | 1653 | scm_call_3 (SCM_APPLY_FRAME_HDLR, scm_sym_apply_frame, tmp, tail);\ |
6dbd0af5 | 1654 | }\ |
d95c0b76 | 1655 | SCM_TRAPS_P = 1;\ |
6dbd0af5 | 1656 | }\ |
d3a6bc94 | 1657 | } while (0) |
0f2d19dd | 1658 | #undef RETURN |
ddea3325 | 1659 | #define RETURN(e) do { proc = (e); goto exit; } while (0) |
b7ff98dd MD |
1660 | #ifdef STACK_CHECKING |
1661 | #ifndef EVAL_STACK_CHECKING | |
1662 | #define EVAL_STACK_CHECKING | |
1663 | #endif | |
6dbd0af5 MD |
1664 | #endif |
1665 | ||
1666 | /* scm_ceval_ptr points to the currently selected evaluator. | |
1667 | * *fixme*: Although efficiency is important here, this state variable | |
1668 | * should probably not be a global. It should be related to the | |
1669 | * current repl. | |
1670 | */ | |
1671 | ||
1cc91f1b | 1672 | |
1bbd0b84 | 1673 | SCM (*scm_ceval_ptr) (SCM x, SCM env); |
0f2d19dd | 1674 | |
1646d37b | 1675 | /* scm_last_debug_frame contains a pointer to the last debugging |
6dbd0af5 MD |
1676 | * information stack frame. It is accessed very often from the |
1677 | * debugging evaluator, so it should probably not be indirectly | |
1678 | * addressed. Better to save and restore it from the current root at | |
1679 | * any stack swaps. | |
1680 | */ | |
1681 | ||
6dbd0af5 MD |
1682 | /* scm_debug_eframe_size is the number of slots available for pseudo |
1683 | * stack frames at each real stack frame. | |
1684 | */ | |
1685 | ||
c014a02e | 1686 | long scm_debug_eframe_size; |
6dbd0af5 | 1687 | |
b7ff98dd | 1688 | int scm_debug_mode, scm_check_entry_p, scm_check_apply_p, scm_check_exit_p; |
6dbd0af5 | 1689 | |
c014a02e | 1690 | long scm_eval_stack; |
a74145b8 | 1691 | |
92c2555f | 1692 | scm_t_option scm_eval_opts[] = { |
a74145b8 | 1693 | { SCM_OPTION_INTEGER, "stack", 22000, "Size of thread stacks (in machine words)." } |
33b97402 MD |
1694 | }; |
1695 | ||
92c2555f | 1696 | scm_t_option scm_debug_opts[] = { |
b7ff98dd MD |
1697 | { SCM_OPTION_BOOLEAN, "cheap", 1, |
1698 | "*Flyweight representation of the stack at traps." }, | |
1699 | { SCM_OPTION_BOOLEAN, "breakpoints", 0, "*Check for breakpoints." }, | |
1700 | { SCM_OPTION_BOOLEAN, "trace", 0, "*Trace mode." }, | |
1701 | { SCM_OPTION_BOOLEAN, "procnames", 1, | |
1702 | "Record procedure names at definition." }, | |
1703 | { SCM_OPTION_BOOLEAN, "backwards", 0, | |
1704 | "Display backtrace in anti-chronological order." }, | |
274dc5fd | 1705 | { SCM_OPTION_INTEGER, "width", 79, "Maximal width of backtrace." }, |
4e646a03 MD |
1706 | { SCM_OPTION_INTEGER, "indent", 10, "Maximal indentation in backtrace." }, |
1707 | { SCM_OPTION_INTEGER, "frames", 3, | |
b7ff98dd | 1708 | "Maximum number of tail-recursive frames in backtrace." }, |
4e646a03 MD |
1709 | { SCM_OPTION_INTEGER, "maxdepth", 1000, |
1710 | "Maximal number of stored backtrace frames." }, | |
1711 | { SCM_OPTION_INTEGER, "depth", 20, "Maximal length of printed backtrace." }, | |
11f77bfc MD |
1712 | { SCM_OPTION_BOOLEAN, "backtrace", 0, "Show backtrace on error." }, |
1713 | { SCM_OPTION_BOOLEAN, "debug", 0, "Use the debugging evaluator." }, | |
863e833b | 1714 | { SCM_OPTION_INTEGER, "stack", 20000, "Stack size limit (measured in words; 0 = no check)." }, |
d95c0b76 | 1715 | { 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 |
1716 | }; |
1717 | ||
92c2555f | 1718 | scm_t_option scm_evaluator_trap_table[] = { |
b6d75948 | 1719 | { SCM_OPTION_BOOLEAN, "traps", 0, "Enable evaluator traps." }, |
b7ff98dd MD |
1720 | { SCM_OPTION_BOOLEAN, "enter-frame", 0, "Trap when eval enters new frame." }, |
1721 | { SCM_OPTION_BOOLEAN, "apply-frame", 0, "Trap when entering apply." }, | |
d95c0b76 NJ |
1722 | { SCM_OPTION_BOOLEAN, "exit-frame", 0, "Trap when exiting eval or apply." }, |
1723 | { SCM_OPTION_SCM, "enter-frame-handler", (unsigned long)SCM_BOOL_F, "Handler for enter-frame traps." }, | |
1724 | { SCM_OPTION_SCM, "apply-frame-handler", (unsigned long)SCM_BOOL_F, "Handler for apply-frame traps." }, | |
1725 | { SCM_OPTION_SCM, "exit-frame-handler", (unsigned long)SCM_BOOL_F, "Handler for exit-frame traps." } | |
6dbd0af5 MD |
1726 | }; |
1727 | ||
a1ec6916 | 1728 | SCM_DEFINE (scm_eval_options_interface, "eval-options-interface", 0, 1, 0, |
1bbd0b84 | 1729 | (SCM setting), |
b3f26b14 MG |
1730 | "Option interface for the evaluation options. Instead of using\n" |
1731 | "this procedure directly, use the procedures @code{eval-enable},\n" | |
3939e9df | 1732 | "@code{eval-disable}, @code{eval-set!} and @code{eval-options}.") |
1bbd0b84 | 1733 | #define FUNC_NAME s_scm_eval_options_interface |
33b97402 MD |
1734 | { |
1735 | SCM ans; | |
1736 | SCM_DEFER_INTS; | |
1737 | ans = scm_options (setting, | |
1738 | scm_eval_opts, | |
1739 | SCM_N_EVAL_OPTIONS, | |
1bbd0b84 | 1740 | FUNC_NAME); |
a74145b8 | 1741 | scm_eval_stack = SCM_EVAL_STACK * sizeof (void *); |
33b97402 MD |
1742 | SCM_ALLOW_INTS; |
1743 | return ans; | |
1744 | } | |
1bbd0b84 | 1745 | #undef FUNC_NAME |
33b97402 | 1746 | |
a1ec6916 | 1747 | SCM_DEFINE (scm_evaluator_traps, "evaluator-traps-interface", 0, 1, 0, |
1bbd0b84 | 1748 | (SCM setting), |
b3f26b14 | 1749 | "Option interface for the evaluator trap options.") |
1bbd0b84 | 1750 | #define FUNC_NAME s_scm_evaluator_traps |
33b97402 MD |
1751 | { |
1752 | SCM ans; | |
1753 | SCM_DEFER_INTS; | |
1754 | ans = scm_options (setting, | |
1755 | scm_evaluator_trap_table, | |
1756 | SCM_N_EVALUATOR_TRAPS, | |
1bbd0b84 | 1757 | FUNC_NAME); |
33b97402 | 1758 | SCM_RESET_DEBUG_MODE; |
bfc69694 | 1759 | SCM_ALLOW_INTS; |
33b97402 MD |
1760 | return ans; |
1761 | } | |
1bbd0b84 | 1762 | #undef FUNC_NAME |
33b97402 | 1763 | |
24933780 | 1764 | static SCM |
a392ee15 | 1765 | deval_args (SCM l, SCM env, SCM proc, SCM *lloc) |
0f2d19dd | 1766 | { |
680ed4a8 | 1767 | SCM *results = lloc, res; |
904a077d | 1768 | while (SCM_CONSP (l)) |
0f2d19dd | 1769 | { |
680ed4a8 | 1770 | res = EVALCAR (l, env); |
904a077d | 1771 | |
8ea46249 | 1772 | *lloc = scm_list_1 (res); |
a23afe53 | 1773 | lloc = SCM_CDRLOC (*lloc); |
0f2d19dd JB |
1774 | l = SCM_CDR (l); |
1775 | } | |
22a52da1 | 1776 | if (!SCM_NULLP (l)) |
904a077d | 1777 | scm_wrong_num_args (proc); |
680ed4a8 | 1778 | return *results; |
0f2d19dd JB |
1779 | } |
1780 | ||
6dbd0af5 MD |
1781 | #endif /* !DEVAL */ |
1782 | ||
1783 | ||
a392ee15 | 1784 | /* SECTION: This code is compiled twice. |
6dbd0af5 MD |
1785 | */ |
1786 | ||
a392ee15 | 1787 | |
d9d39d76 | 1788 | /* Update the toplevel environment frame ENV so that it refers to the |
a392ee15 | 1789 | * current module. */ |
d9d39d76 MV |
1790 | #define UPDATE_TOPLEVEL_ENV(env) \ |
1791 | do { \ | |
1792 | SCM p = scm_current_module_lookup_closure (); \ | |
1793 | if (p != SCM_CAR(env)) \ | |
1794 | env = scm_top_level_env (p); \ | |
1795 | } while (0) | |
1796 | ||
6dbd0af5 | 1797 | |
a392ee15 DH |
1798 | /* This is the evaluator. Like any real monster, it has three heads: |
1799 | * | |
1800 | * scm_ceval is the non-debugging evaluator, scm_deval is the debugging | |
1801 | * version. Both are implemented using a common code base, using the | |
1802 | * following mechanism: SCM_CEVAL is a macro, which is either defined to | |
1803 | * scm_ceval or scm_deval. Thus, there is no function SCM_CEVAL, but the code | |
1804 | * for SCM_CEVAL actually compiles to either scm_ceval or scm_deval. When | |
1805 | * SCM_CEVAL is defined to scm_ceval, it is known that the macro DEVAL is not | |
1806 | * defined. When SCM_CEVAL is defined to scm_deval, then the macro DEVAL is | |
1807 | * known to be defined. Thus, in SCM_CEVAL parts for the debugging evaluator | |
1808 | * are enclosed within #ifdef DEVAL ... #endif. | |
1809 | * | |
1810 | * All three (scm_ceval, scm_deval and their common implementation SCM_CEVAL) | |
1811 | * take two input parameters, x and env: x is a single expression to be | |
1812 | * evalutated. env is the environment in which bindings are searched. | |
1813 | * | |
1814 | * x is known to be a cell (i. e. a pair or any other non-immediate). Since x | |
1815 | * is a single expression, it is necessarily in a tail position. If x is just | |
1816 | * a call to another function like in the expression (foo exp1 exp2 ...), the | |
1817 | * realization of that call therefore _must_not_ increase stack usage (the | |
1818 | * evaluation of exp1, exp2 etc., however, may do so). This is realized by | |
1819 | * making extensive use of 'goto' statements within the evaluator: The gotos | |
1820 | * replace recursive calls to SCM_CEVAL, thus re-using the same stack frame | |
1821 | * that SCM_CEVAL was already using. If, however, x represents some form that | |
1822 | * requires to evaluate a sequence of expressions like (begin exp1 exp2 ...), | |
1823 | * then recursive calls to SCM_CEVAL are performed for all but the last | |
1824 | * expression of that sequence. */ | |
6dbd0af5 | 1825 | |
0f2d19dd | 1826 | #if 0 |
0f2d19dd | 1827 | SCM |
1bbd0b84 | 1828 | scm_ceval (SCM x, SCM env) |
0f2d19dd JB |
1829 | {} |
1830 | #endif | |
1cc91f1b | 1831 | |
a392ee15 | 1832 | #if 0 |
0f2d19dd | 1833 | SCM |
1bbd0b84 | 1834 | scm_deval (SCM x, SCM env) |
0f2d19dd JB |
1835 | {} |
1836 | #endif | |
1837 | ||
6dbd0af5 | 1838 | SCM |
1bbd0b84 | 1839 | SCM_CEVAL (SCM x, SCM env) |
0f2d19dd | 1840 | { |
42030fb2 | 1841 | SCM proc, arg1; |
6dbd0af5 | 1842 | #ifdef DEVAL |
92c2555f MV |
1843 | scm_t_debug_frame debug; |
1844 | scm_t_debug_info *debug_info_end; | |
1646d37b | 1845 | debug.prev = scm_last_debug_frame; |
020c890c | 1846 | debug.status = 0; |
04b6c081 | 1847 | /* |
92c2555f | 1848 | * The debug.vect contains twice as much scm_t_debug_info frames as the |
04b6c081 MD |
1849 | * user has specified with (debug-set! frames <n>). |
1850 | * | |
1851 | * Even frames are eval frames, odd frames are apply frames. | |
1852 | */ | |
92c2555f | 1853 | debug.vect = (scm_t_debug_info *) alloca (scm_debug_eframe_size |
a392ee15 | 1854 | * sizeof (scm_t_debug_info)); |
c0ab1b8d JB |
1855 | debug.info = debug.vect; |
1856 | debug_info_end = debug.vect + scm_debug_eframe_size; | |
1857 | scm_last_debug_frame = &debug; | |
6dbd0af5 | 1858 | #endif |
b7ff98dd | 1859 | #ifdef EVAL_STACK_CHECKING |
6f13f9cb MD |
1860 | if (scm_stack_checking_enabled_p |
1861 | && SCM_STACK_OVERFLOW_P ((SCM_STACKITEM *) &proc)) | |
6dbd0af5 | 1862 | { |
b7ff98dd | 1863 | #ifdef DEVAL |
6dbd0af5 MD |
1864 | debug.info->e.exp = x; |
1865 | debug.info->e.env = env; | |
b7ff98dd | 1866 | #endif |
6dbd0af5 MD |
1867 | scm_report_stack_overflow (); |
1868 | } | |
1869 | #endif | |
6a0f6ff3 | 1870 | |
6dbd0af5 MD |
1871 | #ifdef DEVAL |
1872 | goto start; | |
1873 | #endif | |
6a0f6ff3 | 1874 | |
6dbd0af5 MD |
1875 | loop: |
1876 | #ifdef DEVAL | |
b7ff98dd MD |
1877 | SCM_CLEAR_ARGSREADY (debug); |
1878 | if (SCM_OVERFLOWP (debug)) | |
6dbd0af5 | 1879 | --debug.info; |
04b6c081 MD |
1880 | /* |
1881 | * In theory, this should be the only place where it is necessary to | |
1882 | * check for space in debug.vect since both eval frames and | |
1883 | * available space are even. | |
1884 | * | |
1885 | * For this to be the case, however, it is necessary that primitive | |
1886 | * special forms which jump back to `loop', `begin' or some similar | |
680516ba | 1887 | * label call PREP_APPLY. |
04b6c081 | 1888 | */ |
c0ab1b8d | 1889 | else if (++debug.info >= debug_info_end) |
6dbd0af5 | 1890 | { |
b7ff98dd | 1891 | SCM_SET_OVERFLOW (debug); |
6dbd0af5 MD |
1892 | debug.info -= 2; |
1893 | } | |
6a0f6ff3 | 1894 | |
6dbd0af5 MD |
1895 | start: |
1896 | debug.info->e.exp = x; | |
1897 | debug.info->e.env = env; | |
5132eef0 DH |
1898 | if (scm_check_entry_p && SCM_TRAPS_P) |
1899 | { | |
bc76d628 DH |
1900 | if (SCM_ENTER_FRAME_P |
1901 | || (SCM_BREAKPOINTS_P && scm_c_source_property_breakpoint_p (x))) | |
5132eef0 | 1902 | { |
bc76d628 DH |
1903 | SCM stackrep; |
1904 | SCM tail = SCM_BOOL (SCM_TAILRECP (debug)); | |
5132eef0 DH |
1905 | SCM_SET_TAILREC (debug); |
1906 | if (SCM_CHEAPTRAPS_P) | |
bc76d628 | 1907 | stackrep = scm_make_debugobj (&debug); |
5132eef0 DH |
1908 | else |
1909 | { | |
1910 | int first; | |
1911 | SCM val = scm_make_continuation (&first); | |
1912 | ||
1913 | if (first) | |
bc76d628 | 1914 | stackrep = val; |
5132eef0 DH |
1915 | else |
1916 | { | |
1917 | x = val; | |
1918 | if (SCM_IMP (x)) | |
1919 | RETURN (x); | |
1920 | else | |
1921 | /* This gives the possibility for the debugger to | |
1922 | modify the source expression before evaluation. */ | |
1923 | goto dispatch; | |
1924 | } | |
1925 | } | |
1926 | SCM_TRAPS_P = 0; | |
1927 | scm_call_4 (SCM_ENTER_FRAME_HDLR, | |
1928 | scm_sym_enter_frame, | |
bc76d628 | 1929 | stackrep, |
5132eef0 DH |
1930 | tail, |
1931 | scm_unmemocopy (x, env)); | |
1932 | SCM_TRAPS_P = 1; | |
1933 | } | |
1934 | } | |
6dbd0af5 | 1935 | #endif |
f8769b1d | 1936 | dispatch: |
9cb5124f | 1937 | SCM_TICK; |
0f2d19dd JB |
1938 | switch (SCM_TYP7 (x)) |
1939 | { | |
28b06554 | 1940 | case scm_tc7_symbol: |
a392ee15 | 1941 | /* Only happens when called at top level. */ |
0f2d19dd | 1942 | x = scm_cons (x, SCM_UNDEFINED); |
ddea3325 | 1943 | RETURN (*scm_lookupcar (x, env, 1)); |
0f2d19dd | 1944 | |
6a0f6ff3 | 1945 | case SCM_BIT8 (SCM_IM_AND): |
0f2d19dd | 1946 | x = SCM_CDR (x); |
302c12b4 DH |
1947 | while (!SCM_NULLP (SCM_CDR (x))) |
1948 | { | |
38ace99e DH |
1949 | SCM test_result = EVALCAR (x, env); |
1950 | if (SCM_FALSEP (test_result) || SCM_NILP (test_result)) | |
0f2d19dd | 1951 | RETURN (SCM_BOOL_F); |
302c12b4 DH |
1952 | else |
1953 | x = SCM_CDR (x); | |
1954 | } | |
6dbd0af5 | 1955 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
1956 | goto carloop; |
1957 | ||
6a0f6ff3 | 1958 | case SCM_BIT8 (SCM_IM_BEGIN): |
e050d4f8 DH |
1959 | x = SCM_CDR (x); |
1960 | if (SCM_NULLP (x)) | |
b8113bc8 MV |
1961 | RETURN (SCM_UNSPECIFIED); |
1962 | ||
6dbd0af5 | 1963 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
1964 | |
1965 | begin: | |
4163eb72 MV |
1966 | /* If we are on toplevel with a lookup closure, we need to sync |
1967 | with the current module. */ | |
22a52da1 | 1968 | if (SCM_CONSP (env) && !SCM_CONSP (SCM_CAR (env))) |
4163eb72 | 1969 | { |
d9d39d76 | 1970 | UPDATE_TOPLEVEL_ENV (env); |
302c12b4 | 1971 | while (!SCM_NULLP (SCM_CDR (x))) |
4163eb72 | 1972 | { |
5280aaca | 1973 | EVALCAR (x, env); |
d9d39d76 | 1974 | UPDATE_TOPLEVEL_ENV (env); |
302c12b4 | 1975 | x = SCM_CDR (x); |
4163eb72 | 1976 | } |
5280aaca | 1977 | goto carloop; |
4163eb72 MV |
1978 | } |
1979 | else | |
5280aaca MV |
1980 | goto nontoplevel_begin; |
1981 | ||
5280aaca | 1982 | nontoplevel_begin: |
302c12b4 | 1983 | while (!SCM_NULLP (SCM_CDR (x))) |
0f2d19dd | 1984 | { |
6a0f6ff3 DH |
1985 | SCM form = SCM_CAR (x); |
1986 | if (SCM_IMP (form)) | |
26d5b9b4 | 1987 | { |
6a0f6ff3 | 1988 | if (SCM_ISYMP (form)) |
26d5b9b4 | 1989 | { |
9bc4701c MD |
1990 | SOURCE_SECTION_START; |
1991 | /* check for race condition */ | |
1992 | if (SCM_ISYMP (SCM_CAR (x))) | |
1993 | x = scm_m_expand_body (x, env); | |
1994 | SOURCE_SECTION_END; | |
5280aaca | 1995 | goto nontoplevel_begin; |
26d5b9b4 | 1996 | } |
4163eb72 | 1997 | else |
6a0f6ff3 | 1998 | SCM_VALIDATE_NON_EMPTY_COMBINATION (form); |
26d5b9b4 | 1999 | } |
5280aaca | 2000 | else |
6a0f6ff3 | 2001 | SCM_CEVAL (form, env); |
302c12b4 | 2002 | x = SCM_CDR (x); |
0f2d19dd | 2003 | } |
5280aaca | 2004 | |
6a0f6ff3 DH |
2005 | carloop: |
2006 | { | |
2007 | /* scm_eval last form in list */ | |
2008 | SCM last_form = SCM_CAR (x); | |
0f2d19dd | 2009 | |
6a0f6ff3 DH |
2010 | if (SCM_CONSP (last_form)) |
2011 | { | |
2012 | /* This is by far the most frequent case. */ | |
2013 | x = last_form; | |
2014 | goto loop; /* tail recurse */ | |
2015 | } | |
2016 | else if (SCM_IMP (last_form)) | |
2017 | RETURN (SCM_EVALIM (last_form, env)); | |
2018 | else if (SCM_VARIABLEP (last_form)) | |
2019 | RETURN (SCM_VARIABLE_REF (last_form)); | |
2020 | else if (SCM_SYMBOLP (last_form)) | |
2021 | RETURN (*scm_lookupcar (x, env, 1)); | |
2022 | else | |
2023 | RETURN (last_form); | |
2024 | } | |
0f2d19dd JB |
2025 | |
2026 | ||
38ace99e | 2027 | case SCM_BIT8 (SCM_IM_CASE): |
0f2d19dd | 2028 | x = SCM_CDR (x); |
6a0f6ff3 DH |
2029 | { |
2030 | SCM key = EVALCAR (x, env); | |
2031 | x = SCM_CDR (x); | |
2032 | while (!SCM_NULLP (x)) | |
2033 | { | |
2034 | SCM clause = SCM_CAR (x); | |
2035 | SCM labels = SCM_CAR (clause); | |
2036 | if (SCM_EQ_P (labels, scm_sym_else)) | |
2037 | { | |
2038 | x = SCM_CDR (clause); | |
2039 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2040 | goto begin; | |
2041 | } | |
2042 | while (!SCM_NULLP (labels)) | |
2043 | { | |
2044 | SCM label = SCM_CAR (labels); | |
2045 | if (SCM_EQ_P (label, key) || !SCM_FALSEP (scm_eqv_p (label, key))) | |
2046 | { | |
2047 | x = SCM_CDR (clause); | |
2048 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2049 | goto begin; | |
2050 | } | |
2051 | labels = SCM_CDR (labels); | |
2052 | } | |
2053 | x = SCM_CDR (x); | |
2054 | } | |
2055 | } | |
ddea3325 | 2056 | RETURN (SCM_UNSPECIFIED); |
0f2d19dd JB |
2057 | |
2058 | ||
8ea46249 DH |
2059 | case SCM_BIT8 (SCM_IM_COND): |
2060 | x = SCM_CDR (x); | |
2061 | while (!SCM_NULLP (x)) | |
0f2d19dd | 2062 | { |
e5cb71a0 DH |
2063 | SCM clause = SCM_CAR (x); |
2064 | if (SCM_EQ_P (SCM_CAR (clause), scm_sym_else)) | |
8ea46249 | 2065 | { |
e5cb71a0 | 2066 | x = SCM_CDR (clause); |
8ea46249 DH |
2067 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
2068 | goto begin; | |
2069 | } | |
e5cb71a0 | 2070 | else |
0f2d19dd | 2071 | { |
dff98306 DH |
2072 | arg1 = EVALCAR (clause, env); |
2073 | if (!SCM_FALSEP (arg1) && !SCM_NILP (arg1)) | |
6dbd0af5 | 2074 | { |
e5cb71a0 DH |
2075 | x = SCM_CDR (clause); |
2076 | if (SCM_NULLP (x)) | |
dff98306 | 2077 | RETURN (arg1); |
e5cb71a0 DH |
2078 | else if (!SCM_EQ_P (SCM_CAR (x), scm_sym_arrow)) |
2079 | { | |
2080 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2081 | goto begin; | |
2082 | } | |
2083 | else | |
2084 | { | |
2085 | proc = SCM_CDR (x); | |
2086 | proc = EVALCAR (proc, env); | |
2087 | SCM_ASRTGO (!SCM_IMP (proc), badfun); | |
dff98306 | 2088 | PREP_APPLY (proc, scm_list_1 (arg1)); |
e5cb71a0 DH |
2089 | ENTER_APPLY; |
2090 | if (SCM_CLOSUREP(proc) && scm_badformalsp (proc, 1)) | |
2091 | goto umwrongnumargs; | |
2092 | else | |
2093 | goto evap1; | |
2094 | } | |
6dbd0af5 | 2095 | } |
e5cb71a0 | 2096 | x = SCM_CDR (x); |
0f2d19dd JB |
2097 | } |
2098 | } | |
ddea3325 | 2099 | RETURN (SCM_UNSPECIFIED); |
0f2d19dd JB |
2100 | |
2101 | ||
e5cb71a0 | 2102 | case SCM_BIT8 (SCM_IM_DO): |
0f2d19dd | 2103 | x = SCM_CDR (x); |
e5cb71a0 DH |
2104 | { |
2105 | /* Compute the initialization values and the initial environment. */ | |
2106 | SCM init_forms = SCM_CADR (x); | |
2107 | SCM init_values = SCM_EOL; | |
2108 | while (!SCM_NULLP (init_forms)) | |
2109 | { | |
2110 | init_values = scm_cons (EVALCAR (init_forms, env), init_values); | |
2111 | init_forms = SCM_CDR (init_forms); | |
2112 | } | |
2113 | env = EXTEND_ENV (SCM_CAR (x), init_values, env); | |
2114 | } | |
8ea46249 | 2115 | x = SCM_CDDR (x); |
e5cb71a0 DH |
2116 | { |
2117 | SCM test_form = SCM_CAR (x); | |
2118 | SCM body_forms = SCM_CADR (x); | |
2119 | SCM step_forms = SCM_CDDR (x); | |
2120 | ||
2121 | SCM test_result = EVALCAR (test_form, env); | |
2122 | ||
2123 | while (SCM_FALSEP (test_result) || SCM_NILP (test_result)) | |
2124 | { | |
0f2d19dd | 2125 | { |
e5cb71a0 DH |
2126 | /* Evaluate body forms. */ |
2127 | SCM temp_forms; | |
2128 | for (temp_forms = body_forms; | |
2129 | !SCM_NULLP (temp_forms); | |
2130 | temp_forms = SCM_CDR (temp_forms)) | |
2131 | { | |
2132 | SCM form = SCM_CAR (temp_forms); | |
2133 | /* Dirk:FIXME: We only need to eval forms, that may have a | |
2134 | * side effect here. This is only true for forms that start | |
2135 | * with a pair. All others are just constants. However, | |
2136 | * since in the common case there is no constant expression | |
2137 | * in a body of a do form, we just check for immediates here | |
2138 | * and have SCM_CEVAL take care of other cases. In the long | |
2139 | * run it would make sense to get rid of this test and have | |
2140 | * the macro transformer of 'do' eliminate all forms that | |
2141 | * have no sideeffect. */ | |
2142 | if (!SCM_IMP (form)) | |
2143 | SCM_CEVAL (form, env); | |
2144 | } | |
0f2d19dd | 2145 | } |
e5cb71a0 DH |
2146 | |
2147 | { | |
2148 | /* Evaluate the step expressions. */ | |
2149 | SCM temp_forms; | |
2150 | SCM step_values = SCM_EOL; | |
2151 | for (temp_forms = step_forms; | |
2152 | !SCM_NULLP (temp_forms); | |
2153 | temp_forms = SCM_CDR (temp_forms)) | |
2154 | { | |
2155 | SCM value = EVALCAR (temp_forms, env); | |
2156 | step_values = scm_cons (value, step_values); | |
2157 | } | |
2158 | env = EXTEND_ENV (SCM_CAAR (env), step_values, SCM_CDR (env)); | |
2159 | } | |
2160 | ||
2161 | test_result = EVALCAR (test_form, env); | |
2162 | } | |
2163 | } | |
2164 | x = SCM_CDAR (x); | |
0f2d19dd | 2165 | if (SCM_NULLP (x)) |
6dbd0af5 MD |
2166 | RETURN (SCM_UNSPECIFIED); |
2167 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
5280aaca | 2168 | goto nontoplevel_begin; |
0f2d19dd JB |
2169 | |
2170 | ||
38ace99e | 2171 | case SCM_BIT8 (SCM_IM_IF): |
0f2d19dd | 2172 | x = SCM_CDR (x); |
38ace99e DH |
2173 | { |
2174 | SCM test_result = EVALCAR (x, env); | |
2175 | if (!SCM_FALSEP (test_result) && !SCM_NILP (test_result)) | |
2176 | x = SCM_CDR (x); | |
2177 | else | |
2178 | { | |
2179 | x = SCM_CDDR (x); | |
2180 | if (SCM_NULLP (x)) | |
2181 | RETURN (SCM_UNSPECIFIED); | |
2182 | } | |
2183 | } | |
6dbd0af5 | 2184 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
2185 | goto carloop; |
2186 | ||
2187 | ||
38ace99e | 2188 | case SCM_BIT8 (SCM_IM_LET): |
0f2d19dd | 2189 | x = SCM_CDR (x); |
38ace99e DH |
2190 | { |
2191 | SCM init_forms = SCM_CADR (x); | |
2192 | SCM init_values = SCM_EOL; | |
2193 | do | |
2194 | { | |
2195 | init_values = scm_cons (EVALCAR (init_forms, env), init_values); | |
2196 | init_forms = SCM_CDR (init_forms); | |
2197 | } | |
2198 | while (!SCM_NULLP (init_forms)); | |
2199 | env = EXTEND_ENV (SCM_CAR (x), init_values, env); | |
2200 | } | |
e050d4f8 DH |
2201 | x = SCM_CDDR (x); |
2202 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2203 | goto nontoplevel_begin; | |
0f2d19dd JB |
2204 | |
2205 | ||
38ace99e | 2206 | case SCM_BIT8 (SCM_IM_LETREC): |
0f2d19dd | 2207 | x = SCM_CDR (x); |
e2806c10 | 2208 | env = EXTEND_ENV (SCM_CAR (x), scm_undefineds, env); |
0f2d19dd | 2209 | x = SCM_CDR (x); |
38ace99e DH |
2210 | { |
2211 | SCM init_forms = SCM_CAR (x); | |
2212 | SCM init_values = SCM_EOL; | |
2213 | do | |
2214 | { | |
2215 | init_values = scm_cons (EVALCAR (init_forms, env), init_values); | |
2216 | init_forms = SCM_CDR (init_forms); | |
2217 | } | |
2218 | while (!SCM_NULLP (init_forms)); | |
2219 | SCM_SETCDR (SCM_CAR (env), init_values); | |
2220 | } | |
e050d4f8 DH |
2221 | x = SCM_CDR (x); |
2222 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2223 | goto nontoplevel_begin; | |
0f2d19dd JB |
2224 | |
2225 | ||
38ace99e | 2226 | case SCM_BIT8 (SCM_IM_LETSTAR): |
0f2d19dd | 2227 | x = SCM_CDR (x); |
302c12b4 DH |
2228 | { |
2229 | SCM bindings = SCM_CAR (x); | |
2230 | if (SCM_NULLP (bindings)) | |
e2806c10 | 2231 | env = EXTEND_ENV (SCM_EOL, SCM_EOL, env); |
302c12b4 DH |
2232 | else |
2233 | { | |
2234 | do | |
2235 | { | |
2236 | SCM name = SCM_CAR (bindings); | |
2237 | SCM init = SCM_CDR (bindings); | |
2238 | env = EXTEND_ENV (name, EVALCAR (init, env), env); | |
2239 | bindings = SCM_CDR (init); | |
2240 | } | |
2241 | while (!SCM_NULLP (bindings)); | |
2242 | } | |
2243 | } | |
e050d4f8 DH |
2244 | x = SCM_CDR (x); |
2245 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2246 | goto nontoplevel_begin; | |
0f2d19dd | 2247 | |
302c12b4 | 2248 | |
38ace99e | 2249 | case SCM_BIT8 (SCM_IM_OR): |
0f2d19dd | 2250 | x = SCM_CDR (x); |
302c12b4 | 2251 | while (!SCM_NULLP (SCM_CDR (x))) |
0f2d19dd | 2252 | { |
302c12b4 | 2253 | SCM val = EVALCAR (x, env); |
c96d76b8 | 2254 | if (!SCM_FALSEP (val) && !SCM_NILP (val)) |
302c12b4 DH |
2255 | RETURN (val); |
2256 | else | |
2257 | x = SCM_CDR (x); | |
0f2d19dd | 2258 | } |
6dbd0af5 | 2259 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
2260 | goto carloop; |
2261 | ||
2262 | ||
38ace99e | 2263 | case SCM_BIT8 (SCM_IM_LAMBDA): |
0f2d19dd JB |
2264 | RETURN (scm_closure (SCM_CDR (x), env)); |
2265 | ||
2266 | ||
38ace99e | 2267 | case SCM_BIT8 (SCM_IM_QUOTE): |
8ea46249 | 2268 | RETURN (SCM_CADR (x)); |
0f2d19dd JB |
2269 | |
2270 | ||
38ace99e | 2271 | case SCM_BIT8 (SCM_IM_SET_X): |
0f2d19dd | 2272 | x = SCM_CDR (x); |
38ace99e DH |
2273 | { |
2274 | SCM *location; | |
2275 | SCM variable = SCM_CAR (x); | |
e050d4f8 | 2276 | if (SCM_ILOCP (variable)) |
38ace99e | 2277 | location = scm_ilookup (variable, env); |
3063e30a | 2278 | else if (SCM_VARIABLEP (variable)) |
e050d4f8 | 2279 | location = SCM_VARIABLE_LOC (variable); |
38ace99e DH |
2280 | else /* (SCM_SYMBOLP (variable)) is known to be true */ |
2281 | location = scm_lookupcar (x, env, 1); | |
2282 | x = SCM_CDR (x); | |
2283 | *location = EVALCAR (x, env); | |
2284 | } | |
0f2d19dd | 2285 | RETURN (SCM_UNSPECIFIED); |
0f2d19dd JB |
2286 | |
2287 | ||
c209c88e | 2288 | case SCM_BIT8(SCM_IM_DEFINE): /* only for internal defines */ |
26d5b9b4 MD |
2289 | scm_misc_error (NULL, "Bad define placement", SCM_EOL); |
2290 | ||
38ace99e | 2291 | |
0f2d19dd | 2292 | /* new syntactic forms go here. */ |
3f04400d | 2293 | case SCM_BIT8 (SCM_MAKISYM (0)): |
0f2d19dd JB |
2294 | proc = SCM_CAR (x); |
2295 | SCM_ASRTGO (SCM_ISYMP (proc), badfun); | |
a392ee15 | 2296 | switch (SCM_ISYMNUM (proc)) |
0f2d19dd | 2297 | { |
3f04400d DH |
2298 | |
2299 | ||
0f2d19dd JB |
2300 | case (SCM_ISYMNUM (SCM_IM_APPLY)): |
2301 | proc = SCM_CDR (x); | |
2302 | proc = EVALCAR (proc, env); | |
3f04400d | 2303 | SCM_ASRTGO (!SCM_IMP (proc), badfun); |
0f2d19dd JB |
2304 | if (SCM_CLOSUREP (proc)) |
2305 | { | |
6dbd0af5 | 2306 | PREP_APPLY (proc, SCM_EOL); |
dff98306 DH |
2307 | arg1 = SCM_CDDR (x); |
2308 | arg1 = EVALCAR (arg1, env); | |
a513ead3 MV |
2309 | apply_closure: |
2310 | /* Go here to tail-call a closure. PROC is the closure | |
dff98306 DH |
2311 | and ARG1 is the list of arguments. Do not forget to |
2312 | call PREP_APPLY. */ | |
3f04400d DH |
2313 | { |
2314 | SCM formals = SCM_CLOSURE_FORMALS (proc); | |
6dbd0af5 | 2315 | #ifdef DEVAL |
dff98306 | 2316 | debug.info->a.args = arg1; |
6dbd0af5 | 2317 | #endif |
dff98306 | 2318 | if (scm_badargsp (formals, arg1)) |
ab1f1094 | 2319 | scm_wrong_num_args (proc); |
3f04400d DH |
2320 | ENTER_APPLY; |
2321 | /* Copy argument list */ | |
dff98306 | 2322 | if (SCM_NULL_OR_NIL_P (arg1)) |
3f04400d DH |
2323 | env = EXTEND_ENV (formals, SCM_EOL, SCM_ENV (proc)); |
2324 | else | |
2325 | { | |
dff98306 | 2326 | SCM args = scm_list_1 (SCM_CAR (arg1)); |
3f04400d | 2327 | SCM tail = args; |
dff98306 DH |
2328 | arg1 = SCM_CDR (arg1); |
2329 | while (!SCM_NULL_OR_NIL_P (arg1)) | |
3f04400d | 2330 | { |
dff98306 | 2331 | SCM new_tail = scm_list_1 (SCM_CAR (arg1)); |
3f04400d DH |
2332 | SCM_SETCDR (tail, new_tail); |
2333 | tail = new_tail; | |
dff98306 | 2334 | arg1 = SCM_CDR (arg1); |
3f04400d DH |
2335 | } |
2336 | env = EXTEND_ENV (formals, args, SCM_ENV (proc)); | |
2337 | } | |
1609038c | 2338 | |
3f04400d DH |
2339 | x = SCM_CLOSURE_BODY (proc); |
2340 | goto nontoplevel_begin; | |
2341 | } | |
0f2d19dd | 2342 | } |
3f04400d DH |
2343 | else |
2344 | { | |
2345 | proc = scm_f_apply; | |
2346 | goto evapply; | |
2347 | } | |
2348 | ||
0f2d19dd JB |
2349 | |
2350 | case (SCM_ISYMNUM (SCM_IM_CONT)): | |
5f144b10 GH |
2351 | { |
2352 | int first; | |
2353 | SCM val = scm_make_continuation (&first); | |
2354 | ||
e050d4f8 | 2355 | if (!first) |
5f144b10 | 2356 | RETURN (val); |
e050d4f8 DH |
2357 | else |
2358 | { | |
2359 | arg1 = val; | |
2360 | proc = SCM_CDR (x); | |
2361 | proc = scm_eval_car (proc, env); | |
2362 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
2363 | PREP_APPLY (proc, scm_list_1 (arg1)); | |
2364 | ENTER_APPLY; | |
2365 | if (SCM_CLOSUREP(proc) && scm_badformalsp (proc, 1)) | |
2366 | goto umwrongnumargs; | |
2367 | goto evap1; | |
2368 | } | |
5f144b10 | 2369 | } |
e050d4f8 | 2370 | |
0f2d19dd | 2371 | |
a570e93a | 2372 | case (SCM_ISYMNUM (SCM_IM_DELAY)): |
ddea3325 | 2373 | RETURN (scm_makprom (scm_closure (SCM_CDR (x), env))); |
a570e93a | 2374 | |
e050d4f8 | 2375 | |
89efbff4 | 2376 | case (SCM_ISYMNUM (SCM_IM_DISPATCH)): |
61364ba6 | 2377 | { |
f12745b6 | 2378 | /* If not done yet, evaluate the operand forms. The result is a |
dff98306 | 2379 | * list of arguments stored in arg1, which is used to perform the |
f12745b6 DH |
2380 | * function dispatch. */ |
2381 | SCM operand_forms = SCM_CADR (x); | |
2382 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2383 | if (SCM_ILOCP (operand_forms)) | |
dff98306 | 2384 | arg1 = *scm_ilookup (operand_forms, env); |
f12745b6 | 2385 | else if (SCM_VARIABLEP (operand_forms)) |
dff98306 | 2386 | arg1 = SCM_VARIABLE_REF (operand_forms); |
f12745b6 | 2387 | else if (!SCM_CONSP (operand_forms)) |
dff98306 | 2388 | arg1 = *scm_lookupcar (SCM_CDR (x), env, 1); |
61364ba6 MD |
2389 | else |
2390 | { | |
dff98306 | 2391 | SCM tail = arg1 = scm_list_1 (EVALCAR (operand_forms, env)); |
f12745b6 DH |
2392 | operand_forms = SCM_CDR (operand_forms); |
2393 | while (!SCM_NULLP (operand_forms)) | |
2394 | { | |
2395 | SCM new_tail = scm_list_1 (EVALCAR (operand_forms, env)); | |
2396 | SCM_SETCDR (tail, new_tail); | |
2397 | tail = new_tail; | |
2398 | operand_forms = SCM_CDR (operand_forms); | |
2399 | } | |
2400 | } | |
2401 | } | |
2402 | ||
2403 | /* The type dispatch code is duplicated below | |
2404 | * (c.f. objects.c:scm_mcache_compute_cmethod) since that | |
2405 | * cuts down execution time for type dispatch to 50%. */ | |
dff98306 | 2406 | type_dispatch: /* inputs: x, arg1 */ |
f12745b6 DH |
2407 | /* Type dispatch means to determine from the types of the function |
2408 | * arguments (i. e. the 'signature' of the call), which method from | |
2409 | * a generic function is to be called. This process of selecting | |
2410 | * the right method takes some time. To speed it up, guile uses | |
2411 | * caching: Together with the macro call to dispatch the signatures | |
2412 | * of some previous calls to that generic function from the same | |
2413 | * place are stored (in the code!) in a cache that we call the | |
2414 | * 'method cache'. This is done since it is likely, that | |
2415 | * consecutive calls to dispatch from that position in the code will | |
2416 | * have the same signature. Thus, the type dispatch works as | |
2417 | * follows: First, determine a hash value from the signature of the | |
2418 | * actual arguments. Second, use this hash value as an index to | |
2419 | * find that same signature in the method cache stored at this | |
2420 | * position in the code. If found, you have also found the | |
2421 | * corresponding method that belongs to that signature. If the | |
2422 | * signature is not found in the method cache, you have to perform a | |
2423 | * full search over all signatures stored with the generic | |
2424 | * function. */ | |
2425 | { | |
2426 | unsigned long int specializers; | |
2427 | unsigned long int hash_value; | |
2428 | unsigned long int cache_end_pos; | |
2429 | unsigned long int mask; | |
2430 | SCM method_cache; | |
2431 | ||
2432 | { | |
2433 | SCM z = SCM_CDDR (x); | |
2434 | SCM tmp = SCM_CADR (z); | |
2435 | specializers = SCM_INUM (SCM_CAR (z)); | |
2436 | ||
2437 | /* Compute a hash value for searching the method cache. There | |
2438 | * are two variants for computing the hash value, a (rather) | |
2439 | * complicated one, and a simple one. For the complicated one | |
2440 | * explained below, tmp holds a number that is used in the | |
2441 | * computation. */ | |
2442 | if (SCM_INUMP (tmp)) | |
2443 | { | |
2444 | /* Use the signature of the actual arguments to determine | |
2445 | * the hash value. This is done as follows: Each class has | |
2446 | * an array of random numbers, that are determined when the | |
2447 | * class is created. The integer 'hashset' is an index into | |
2448 | * that array of random numbers. Now, from all classes that | |
2449 | * are part of the signature of the actual arguments, the | |
2450 | * random numbers at index 'hashset' are taken and summed | |
2451 | * up, giving the hash value. The value of 'hashset' is | |
2452 | * stored at the call to dispatch. This allows to have | |
2453 | * different 'formulas' for calculating the hash value at | |
2454 | * different places where dispatch is called. This allows | |
2455 | * to optimize the hash formula at every individual place | |
2456 | * where dispatch is called, such that hopefully the hash | |
2457 | * value that is computed will directly point to the right | |
2458 | * method in the method cache. */ | |
2459 | unsigned long int hashset = SCM_INUM (tmp); | |
2460 | unsigned long int counter = specializers + 1; | |
dff98306 | 2461 | SCM tmp_arg = arg1; |
f12745b6 DH |
2462 | hash_value = 0; |
2463 | while (!SCM_NULLP (tmp_arg) && counter != 0) | |
61364ba6 | 2464 | { |
f12745b6 DH |
2465 | SCM class = scm_class_of (SCM_CAR (tmp_arg)); |
2466 | hash_value += SCM_INSTANCE_HASH (class, hashset); | |
2467 | tmp_arg = SCM_CDR (tmp_arg); | |
2468 | counter--; | |
61364ba6 | 2469 | } |
f12745b6 DH |
2470 | z = SCM_CDDR (z); |
2471 | method_cache = SCM_CADR (z); | |
2472 | mask = SCM_INUM (SCM_CAR (z)); | |
2473 | hash_value &= mask; | |
2474 | cache_end_pos = hash_value; | |
2475 | } | |
2476 | else | |
2477 | { | |
2478 | /* This method of determining the hash value is much | |
2479 | * simpler: Set the hash value to zero and just perform a | |
2480 | * linear search through the method cache. */ | |
2481 | method_cache = tmp; | |
2482 | mask = (unsigned long int) ((long) -1); | |
2483 | hash_value = 0; | |
2484 | cache_end_pos = SCM_VECTOR_LENGTH (method_cache); | |
2485 | } | |
2486 | } | |
61364ba6 | 2487 | |
f12745b6 DH |
2488 | { |
2489 | /* Search the method cache for a method with a matching | |
2490 | * signature. Start the search at position 'hash_value'. The | |
2491 | * hashing implementation uses linear probing for conflict | |
2492 | * resolution, that is, if the signature in question is not | |
2493 | * found at the starting index in the hash table, the next table | |
2494 | * entry is tried, and so on, until in the worst case the whole | |
2495 | * cache has been searched, but still the signature has not been | |
2496 | * found. */ | |
2497 | SCM z; | |
2498 | do | |
2499 | { | |
dff98306 | 2500 | SCM args = arg1; /* list of arguments */ |
f12745b6 DH |
2501 | z = SCM_VELTS (method_cache)[hash_value]; |
2502 | while (!SCM_NULLP (args)) | |
61364ba6 MD |
2503 | { |
2504 | /* More arguments than specifiers => CLASS != ENV */ | |
f12745b6 DH |
2505 | SCM class_of_arg = scm_class_of (SCM_CAR (args)); |
2506 | if (!SCM_EQ_P (class_of_arg, SCM_CAR (z))) | |
61364ba6 | 2507 | goto next_method; |
f12745b6 | 2508 | args = SCM_CDR (args); |
61364ba6 MD |
2509 | z = SCM_CDR (z); |
2510 | } | |
f12745b6 DH |
2511 | /* Fewer arguments than specifiers => CAR != ENV */ |
2512 | if (SCM_NULLP (SCM_CAR (z)) || SCM_CONSP (SCM_CAR (z))) | |
2513 | goto apply_cmethod; | |
2514 | next_method: | |
2515 | hash_value = (hash_value + 1) & mask; | |
2516 | } while (hash_value != cache_end_pos); | |
2517 | ||
2518 | /* No appropriate method was found in the cache. */ | |
dff98306 | 2519 | z = scm_memoize_method (x, arg1); |
f12745b6 | 2520 | |
dff98306 | 2521 | apply_cmethod: /* inputs: z, arg1 */ |
f12745b6 DH |
2522 | { |
2523 | SCM formals = SCM_CMETHOD_FORMALS (z); | |
dff98306 | 2524 | env = EXTEND_ENV (formals, arg1, SCM_CMETHOD_ENV (z)); |
f12745b6 DH |
2525 | x = SCM_CMETHOD_BODY (z); |
2526 | goto nontoplevel_begin; | |
2527 | } | |
2528 | } | |
61364ba6 | 2529 | } |
73b64342 | 2530 | |
1d15ecd3 | 2531 | |
ca4be6ea MD |
2532 | case (SCM_ISYMNUM (SCM_IM_SLOT_REF)): |
2533 | x = SCM_CDR (x); | |
1d15ecd3 DH |
2534 | { |
2535 | SCM instance = EVALCAR (x, env); | |
2536 | unsigned long int slot = SCM_INUM (SCM_CADR (x)); | |
2537 | RETURN (SCM_PACK (SCM_STRUCT_DATA (instance) [slot])); | |
2538 | } | |
2539 | ||
2540 | ||
ca4be6ea MD |
2541 | case (SCM_ISYMNUM (SCM_IM_SLOT_SET_X)): |
2542 | x = SCM_CDR (x); | |
1d15ecd3 DH |
2543 | { |
2544 | SCM instance = EVALCAR (x, env); | |
2545 | unsigned long int slot = SCM_INUM (SCM_CADR (x)); | |
2546 | SCM value = EVALCAR (SCM_CDDR (x), env); | |
2547 | SCM_STRUCT_DATA (instance) [slot] = SCM_UNPACK (value); | |
2548 | RETURN (SCM_UNSPECIFIED); | |
2549 | } | |
2550 | ||
c96d76b8 NJ |
2551 | |
2552 | #ifdef SCM_ENABLE_ELISP | |
ca4be6ea | 2553 | |
73b64342 | 2554 | case (SCM_ISYMNUM (SCM_IM_NIL_COND)): |
1d15ecd3 DH |
2555 | { |
2556 | SCM test_form = SCM_CDR (x); | |
2557 | x = SCM_CDR (test_form); | |
2558 | while (!SCM_NULL_OR_NIL_P (x)) | |
2559 | { | |
2560 | SCM test_result = EVALCAR (test_form, env); | |
2561 | if (!(SCM_FALSEP (test_result) | |
2562 | || SCM_NULL_OR_NIL_P (test_result))) | |
2563 | { | |
2564 | if (SCM_EQ_P (SCM_CAR (x), SCM_UNSPECIFIED)) | |
2565 | RETURN (test_result); | |
2566 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2567 | goto carloop; | |
2568 | } | |
2569 | else | |
2570 | { | |
2571 | test_form = SCM_CDR (x); | |
2572 | x = SCM_CDR (test_form); | |
2573 | } | |
2574 | } | |
2575 | x = test_form; | |
2576 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2577 | goto carloop; | |
2578 | } | |
73b64342 | 2579 | |
c96d76b8 | 2580 | #endif /* SCM_ENABLE_ELISP */ |
73b64342 MD |
2581 | |
2582 | case (SCM_ISYMNUM (SCM_IM_BIND)): | |
2e171178 MV |
2583 | { |
2584 | SCM vars, exps, vals; | |
73b64342 | 2585 | |
2e171178 MV |
2586 | x = SCM_CDR (x); |
2587 | vars = SCM_CAAR (x); | |
2588 | exps = SCM_CDAR (x); | |
2589 | ||
2590 | vals = SCM_EOL; | |
2591 | ||
2592 | while (SCM_NIMP (exps)) | |
2593 | { | |
2594 | vals = scm_cons (EVALCAR (exps, env), vals); | |
2595 | exps = SCM_CDR (exps); | |
2596 | } | |
2597 | ||
2598 | scm_swap_bindings (vars, vals); | |
2599 | scm_dynwinds = scm_acons (vars, vals, scm_dynwinds); | |
1d15ecd3 DH |
2600 | |
2601 | /* Ignore all but the last evaluation result. */ | |
2602 | for (x = SCM_CDR (x); !SCM_NULLP (SCM_CDR (x)); x = SCM_CDR (x)) | |
2e171178 | 2603 | { |
1d15ecd3 DH |
2604 | if (SCM_CONSP (SCM_CAR (x))) |
2605 | SCM_CEVAL (SCM_CAR (x), env); | |
2e171178 MV |
2606 | } |
2607 | proc = EVALCAR (x, env); | |
73b64342 | 2608 | |
2e171178 MV |
2609 | scm_dynwinds = SCM_CDR (scm_dynwinds); |
2610 | scm_swap_bindings (vars, vals); | |
73b64342 | 2611 | |
ddea3325 | 2612 | RETURN (proc); |
2e171178 | 2613 | } |
c96d76b8 | 2614 | |
1d15ecd3 | 2615 | |
a513ead3 MV |
2616 | case (SCM_ISYMNUM (SCM_IM_CALL_WITH_VALUES)): |
2617 | { | |
2618 | proc = SCM_CDR (x); | |
2619 | x = EVALCAR (proc, env); | |
2620 | proc = SCM_CDR (proc); | |
2621 | proc = EVALCAR (proc, env); | |
dff98306 DH |
2622 | arg1 = SCM_APPLY (x, SCM_EOL, SCM_EOL); |
2623 | if (SCM_VALUESP (arg1)) | |
2624 | arg1 = scm_struct_ref (arg1, SCM_INUM0); | |
a513ead3 | 2625 | else |
dff98306 | 2626 | arg1 = scm_list_1 (arg1); |
a513ead3 MV |
2627 | if (SCM_CLOSUREP (proc)) |
2628 | { | |
dff98306 | 2629 | PREP_APPLY (proc, arg1); |
a513ead3 MV |
2630 | goto apply_closure; |
2631 | } | |
dff98306 | 2632 | return SCM_APPLY (proc, arg1, SCM_EOL); |
a513ead3 MV |
2633 | } |
2634 | ||
b7798e10 | 2635 | |
0f2d19dd JB |
2636 | default: |
2637 | goto badfun; | |
2638 | } | |
2639 | ||
2640 | default: | |
2641 | proc = x; | |
2642 | badfun: | |
1afff620 | 2643 | scm_misc_error (NULL, "Wrong type to apply: ~S", scm_list_1 (proc)); |
0f2d19dd JB |
2644 | case scm_tc7_vector: |
2645 | case scm_tc7_wvect: | |
afe5177e | 2646 | #ifdef HAVE_ARRAYS |
0f2d19dd JB |
2647 | case scm_tc7_bvect: |
2648 | case scm_tc7_byvect: | |
2649 | case scm_tc7_svect: | |
2650 | case scm_tc7_ivect: | |
2651 | case scm_tc7_uvect: | |
2652 | case scm_tc7_fvect: | |
2653 | case scm_tc7_dvect: | |
2654 | case scm_tc7_cvect: | |
5c11cc9d | 2655 | #ifdef HAVE_LONG_LONGS |
0f2d19dd | 2656 | case scm_tc7_llvect: |
afe5177e | 2657 | #endif |
0f2d19dd JB |
2658 | #endif |
2659 | case scm_tc7_string: | |
0f2d19dd JB |
2660 | case scm_tc7_smob: |
2661 | case scm_tcs_closures: | |
224822be | 2662 | case scm_tc7_cclo: |
89efbff4 | 2663 | case scm_tc7_pws: |
0f2d19dd | 2664 | case scm_tcs_subrs: |
904a077d | 2665 | case scm_tcs_struct: |
0f2d19dd JB |
2666 | RETURN (x); |
2667 | ||
d22a0ea1 | 2668 | case scm_tc7_variable: |
a130e982 | 2669 | RETURN (SCM_VARIABLE_REF(x)); |
d22a0ea1 | 2670 | |
c209c88e | 2671 | case SCM_BIT8(SCM_ILOC00): |
0f2d19dd JB |
2672 | proc = *scm_ilookup (SCM_CAR (x), env); |
2673 | SCM_ASRTGO (SCM_NIMP (proc), badfun); | |
0f2d19dd | 2674 | goto checkargs; |
b7798e10 | 2675 | |
0f2d19dd | 2676 | case scm_tcs_cons_nimcar: |
e050d4f8 | 2677 | if (SCM_SYMBOLP (SCM_CAR (x))) |
0f2d19dd | 2678 | { |
e050d4f8 | 2679 | SCM orig_sym = SCM_CAR (x); |
b7798e10 DH |
2680 | { |
2681 | SCM *location = scm_lookupcar1 (x, env, 1); | |
2682 | if (location == NULL) | |
2683 | { | |
2684 | /* we have lost the race, start again. */ | |
2685 | goto dispatch; | |
2686 | } | |
2687 | proc = *location; | |
2688 | } | |
f8769b1d | 2689 | |
0f2d19dd JB |
2690 | if (SCM_IMP (proc)) |
2691 | { | |
86d31dfe MV |
2692 | SCM_SETCAR (x, orig_sym); /* Undo memoizing effect of |
2693 | lookupcar */ | |
0f2d19dd JB |
2694 | goto badfun; |
2695 | } | |
22a52da1 | 2696 | if (SCM_MACROP (proc)) |
0f2d19dd | 2697 | { |
86d31dfe MV |
2698 | SCM_SETCAR (x, orig_sym); /* Undo memoizing effect of |
2699 | lookupcar */ | |
e050d4f8 | 2700 | handle_a_macro: /* inputs: x, env, proc */ |
368bf056 | 2701 | #ifdef DEVAL |
7c354052 MD |
2702 | /* Set a flag during macro expansion so that macro |
2703 | application frames can be deleted from the backtrace. */ | |
2704 | SCM_SET_MACROEXP (debug); | |
368bf056 | 2705 | #endif |
dff98306 | 2706 | arg1 = SCM_APPLY (SCM_MACRO_CODE (proc), x, |
f8769b1d MV |
2707 | scm_cons (env, scm_listofnull)); |
2708 | ||
7c354052 MD |
2709 | #ifdef DEVAL |
2710 | SCM_CLEAR_MACROEXP (debug); | |
2711 | #endif | |
22a52da1 | 2712 | switch (SCM_MACRO_TYPE (proc)) |
0f2d19dd JB |
2713 | { |
2714 | case 2: | |
dff98306 DH |
2715 | if (scm_ilength (arg1) <= 0) |
2716 | arg1 = scm_list_2 (SCM_IM_BEGIN, arg1); | |
6dbd0af5 | 2717 | #ifdef DEVAL |
22a52da1 | 2718 | if (!SCM_CLOSUREP (SCM_MACRO_CODE (proc))) |
6dbd0af5 | 2719 | { |
6dbd0af5 | 2720 | SCM_DEFER_INTS; |
dff98306 DH |
2721 | SCM_SETCAR (x, SCM_CAR (arg1)); |
2722 | SCM_SETCDR (x, SCM_CDR (arg1)); | |
6dbd0af5 MD |
2723 | SCM_ALLOW_INTS; |
2724 | goto dispatch; | |
2725 | } | |
2726 | /* Prevent memoizing of debug info expression. */ | |
6203706f MD |
2727 | debug.info->e.exp = scm_cons_source (debug.info->e.exp, |
2728 | SCM_CAR (x), | |
2729 | SCM_CDR (x)); | |
6dbd0af5 | 2730 | #endif |
0f2d19dd | 2731 | SCM_DEFER_INTS; |
dff98306 DH |
2732 | SCM_SETCAR (x, SCM_CAR (arg1)); |
2733 | SCM_SETCDR (x, SCM_CDR (arg1)); | |
0f2d19dd | 2734 | SCM_ALLOW_INTS; |
680516ba DH |
2735 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
2736 | goto loop; | |
3063e30a | 2737 | #if SCM_ENABLE_DEPRECATED == 1 |
0f2d19dd | 2738 | case 1: |
680516ba DH |
2739 | x = arg1; |
2740 | if (SCM_NIMP (x)) | |
2741 | { | |
2742 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2743 | goto loop; | |
2744 | } | |
2745 | else | |
2746 | RETURN (arg1); | |
3063e30a | 2747 | #endif |
0f2d19dd | 2748 | case 0: |
dff98306 | 2749 | RETURN (arg1); |
0f2d19dd JB |
2750 | } |
2751 | } | |
2752 | } | |
2753 | else | |
2754 | proc = SCM_CEVAL (SCM_CAR (x), env); | |
22a52da1 | 2755 | SCM_ASRTGO (!SCM_IMP (proc), badfun); |
bd987b8e | 2756 | |
0f2d19dd | 2757 | checkargs: |
0f2d19dd JB |
2758 | if (SCM_CLOSUREP (proc)) |
2759 | { | |
e050d4f8 DH |
2760 | SCM formals = SCM_CLOSURE_FORMALS (proc); |
2761 | SCM args = SCM_CDR (x); | |
2762 | while (!SCM_NULLP (formals)) | |
0f2d19dd | 2763 | { |
e050d4f8 | 2764 | if (!SCM_CONSP (formals)) |
0f2d19dd | 2765 | goto evapply; |
e050d4f8 | 2766 | if (SCM_IMP (args)) |
0f2d19dd | 2767 | goto umwrongnumargs; |
e050d4f8 DH |
2768 | formals = SCM_CDR (formals); |
2769 | args = SCM_CDR (args); | |
0f2d19dd | 2770 | } |
e050d4f8 | 2771 | if (!SCM_NULLP (args)) |
0f2d19dd JB |
2772 | goto umwrongnumargs; |
2773 | } | |
22a52da1 | 2774 | else if (SCM_MACROP (proc)) |
0f2d19dd | 2775 | goto handle_a_macro; |
0f2d19dd JB |
2776 | } |
2777 | ||
2778 | ||
e050d4f8 | 2779 | evapply: /* inputs: x, proc */ |
6dbd0af5 MD |
2780 | PREP_APPLY (proc, SCM_EOL); |
2781 | if (SCM_NULLP (SCM_CDR (x))) { | |
2782 | ENTER_APPLY; | |
89efbff4 | 2783 | evap0: |
0f2d19dd JB |
2784 | switch (SCM_TYP7 (proc)) |
2785 | { /* no arguments given */ | |
2786 | case scm_tc7_subr_0: | |
2787 | RETURN (SCM_SUBRF (proc) ()); | |
2788 | case scm_tc7_subr_1o: | |
2789 | RETURN (SCM_SUBRF (proc) (SCM_UNDEFINED)); | |
2790 | case scm_tc7_lsubr: | |
2791 | RETURN (SCM_SUBRF (proc) (SCM_EOL)); | |
2792 | case scm_tc7_rpsubr: | |
2793 | RETURN (SCM_BOOL_T); | |
2794 | case scm_tc7_asubr: | |
2795 | RETURN (SCM_SUBRF (proc) (SCM_UNDEFINED, SCM_UNDEFINED)); | |
0717dfd8 | 2796 | case scm_tc7_smob: |
68b06924 | 2797 | if (!SCM_SMOB_APPLICABLE_P (proc)) |
0717dfd8 | 2798 | goto badfun; |
68b06924 | 2799 | RETURN (SCM_SMOB_APPLY_0 (proc)); |
0f2d19dd | 2800 | case scm_tc7_cclo: |
dff98306 | 2801 | arg1 = proc; |
0f2d19dd | 2802 | proc = SCM_CCLO_SUBR (proc); |
6dbd0af5 MD |
2803 | #ifdef DEVAL |
2804 | debug.info->a.proc = proc; | |
dff98306 | 2805 | debug.info->a.args = scm_list_1 (arg1); |
6dbd0af5 | 2806 | #endif |
0f2d19dd | 2807 | goto evap1; |
89efbff4 MD |
2808 | case scm_tc7_pws: |
2809 | proc = SCM_PROCEDURE (proc); | |
2810 | #ifdef DEVAL | |
2811 | debug.info->a.proc = proc; | |
2812 | #endif | |
002f1a5d MD |
2813 | if (!SCM_CLOSUREP (proc)) |
2814 | goto evap0; | |
2815 | if (scm_badformalsp (proc, 0)) | |
2816 | goto umwrongnumargs; | |
0f2d19dd | 2817 | case scm_tcs_closures: |
f9450cdb | 2818 | x = SCM_CLOSURE_BODY (proc); |
726d810a | 2819 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), SCM_EOL, SCM_ENV (proc)); |
f9450cdb | 2820 | goto nontoplevel_begin; |
904a077d | 2821 | case scm_tcs_struct: |
195847fa MD |
2822 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) |
2823 | { | |
2824 | x = SCM_ENTITY_PROCEDURE (proc); | |
dff98306 | 2825 | arg1 = SCM_EOL; |
195847fa MD |
2826 | goto type_dispatch; |
2827 | } | |
2828 | else if (!SCM_I_OPERATORP (proc)) | |
9b07e212 MD |
2829 | goto badfun; |
2830 | else | |
da7f71d7 | 2831 | { |
dff98306 | 2832 | arg1 = proc; |
195847fa MD |
2833 | proc = (SCM_I_ENTITYP (proc) |
2834 | ? SCM_ENTITY_PROCEDURE (proc) | |
2835 | : SCM_OPERATOR_PROCEDURE (proc)); | |
da7f71d7 | 2836 | #ifdef DEVAL |
195847fa | 2837 | debug.info->a.proc = proc; |
dff98306 | 2838 | debug.info->a.args = scm_list_1 (arg1); |
da7f71d7 | 2839 | #endif |
195847fa MD |
2840 | if (SCM_NIMP (proc)) |
2841 | goto evap1; | |
2842 | else | |
2843 | goto badfun; | |
da7f71d7 | 2844 | } |
0f2d19dd JB |
2845 | case scm_tc7_subr_1: |
2846 | case scm_tc7_subr_2: | |
2847 | case scm_tc7_subr_2o: | |
2848 | case scm_tc7_cxr: | |
2849 | case scm_tc7_subr_3: | |
2850 | case scm_tc7_lsubr_2: | |
2851 | umwrongnumargs: | |
2852 | unmemocar (x, env); | |
f5bf2977 | 2853 | scm_wrong_num_args (proc); |
0f2d19dd JB |
2854 | default: |
2855 | /* handle macros here */ | |
2856 | goto badfun; | |
2857 | } | |
6dbd0af5 | 2858 | } |
0f2d19dd JB |
2859 | |
2860 | /* must handle macros by here */ | |
2861 | x = SCM_CDR (x); | |
dff98306 DH |
2862 | if (SCM_CONSP (x)) |
2863 | arg1 = EVALCAR (x, env); | |
680ed4a8 | 2864 | else |
ab1f1094 | 2865 | scm_wrong_num_args (proc); |
6dbd0af5 | 2866 | #ifdef DEVAL |
dff98306 | 2867 | debug.info->a.args = scm_list_1 (arg1); |
6dbd0af5 | 2868 | #endif |
0f2d19dd | 2869 | x = SCM_CDR (x); |
42030fb2 DH |
2870 | { |
2871 | SCM arg2; | |
2872 | if (SCM_NULLP (x)) | |
2873 | { | |
2874 | ENTER_APPLY; | |
2875 | evap1: /* inputs: proc, arg1 */ | |
2876 | switch (SCM_TYP7 (proc)) | |
2877 | { /* have one argument in arg1 */ | |
2878 | case scm_tc7_subr_2o: | |
2879 | RETURN (SCM_SUBRF (proc) (arg1, SCM_UNDEFINED)); | |
2880 | case scm_tc7_subr_1: | |
2881 | case scm_tc7_subr_1o: | |
2882 | RETURN (SCM_SUBRF (proc) (arg1)); | |
2883 | case scm_tc7_cxr: | |
2884 | if (SCM_SUBRF (proc)) | |
2885 | { | |
2886 | if (SCM_INUMP (arg1)) | |
2887 | { | |
2888 | RETURN (scm_make_real (SCM_DSUBRF (proc) ((double) SCM_INUM (arg1)))); | |
2889 | } | |
2890 | else if (SCM_REALP (arg1)) | |
2891 | { | |
2892 | RETURN (scm_make_real (SCM_DSUBRF (proc) (SCM_REAL_VALUE (arg1)))); | |
2893 | } | |
0f2d19dd | 2894 | #ifdef SCM_BIGDIG |
42030fb2 DH |
2895 | else if (SCM_BIGP (arg1)) |
2896 | { | |
2897 | RETURN (scm_make_real (SCM_DSUBRF (proc) (scm_i_big2dbl (arg1)))); | |
2898 | } | |
2899 | #endif | |
2900 | SCM_WTA_DISPATCH_1 (*SCM_SUBR_GENERIC (proc), arg1, | |
2901 | SCM_ARG1, SCM_SYMBOL_CHARS (SCM_SNAME (proc))); | |
2902 | } | |
2903 | proc = SCM_SNAME (proc); | |
2904 | { | |
2905 | char *chrs = SCM_SYMBOL_CHARS (proc) + SCM_SYMBOL_LENGTH (proc) - 1; | |
2906 | while ('c' != *--chrs) | |
0f2d19dd | 2907 | { |
42030fb2 DH |
2908 | SCM_ASSERT (SCM_CONSP (arg1), |
2909 | arg1, SCM_ARG1, SCM_SYMBOL_CHARS (proc)); | |
2910 | arg1 = ('a' == *chrs) ? SCM_CAR (arg1) : SCM_CDR (arg1); | |
0f2d19dd | 2911 | } |
42030fb2 | 2912 | RETURN (arg1); |
0f2d19dd | 2913 | } |
42030fb2 DH |
2914 | case scm_tc7_rpsubr: |
2915 | RETURN (SCM_BOOL_T); | |
2916 | case scm_tc7_asubr: | |
2917 | RETURN (SCM_SUBRF (proc) (arg1, SCM_UNDEFINED)); | |
2918 | case scm_tc7_lsubr: | |
0f2d19dd | 2919 | #ifdef DEVAL |
42030fb2 | 2920 | RETURN (SCM_SUBRF (proc) (debug.info->a.args)); |
0f2d19dd | 2921 | #else |
42030fb2 | 2922 | RETURN (SCM_SUBRF (proc) (scm_list_1 (arg1))); |
0f2d19dd | 2923 | #endif |
42030fb2 DH |
2924 | case scm_tc7_smob: |
2925 | if (!SCM_SMOB_APPLICABLE_P (proc)) | |
2926 | goto badfun; | |
2927 | RETURN (SCM_SMOB_APPLY_1 (proc, arg1)); | |
2928 | case scm_tc7_cclo: | |
2929 | arg2 = arg1; | |
2930 | arg1 = proc; | |
2931 | proc = SCM_CCLO_SUBR (proc); | |
6dbd0af5 | 2932 | #ifdef DEVAL |
42030fb2 DH |
2933 | debug.info->a.args = scm_cons (arg1, debug.info->a.args); |
2934 | debug.info->a.proc = proc; | |
6dbd0af5 | 2935 | #endif |
42030fb2 DH |
2936 | goto evap2; |
2937 | case scm_tc7_pws: | |
2938 | proc = SCM_PROCEDURE (proc); | |
89efbff4 | 2939 | #ifdef DEVAL |
42030fb2 | 2940 | debug.info->a.proc = proc; |
89efbff4 | 2941 | #endif |
42030fb2 DH |
2942 | if (!SCM_CLOSUREP (proc)) |
2943 | goto evap1; | |
2944 | if (scm_badformalsp (proc, 1)) | |
2945 | goto umwrongnumargs; | |
2946 | case scm_tcs_closures: | |
2947 | /* clos1: */ | |
2948 | x = SCM_CLOSURE_BODY (proc); | |
0f2d19dd | 2949 | #ifdef DEVAL |
42030fb2 | 2950 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), debug.info->a.args, SCM_ENV (proc)); |
0f2d19dd | 2951 | #else |
42030fb2 | 2952 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), scm_list_1 (arg1), SCM_ENV (proc)); |
0f2d19dd | 2953 | #endif |
42030fb2 DH |
2954 | goto nontoplevel_begin; |
2955 | case scm_tcs_struct: | |
2956 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) | |
2957 | { | |
2958 | x = SCM_ENTITY_PROCEDURE (proc); | |
f3d2630a | 2959 | #ifdef DEVAL |
42030fb2 | 2960 | arg1 = debug.info->a.args; |
f3d2630a | 2961 | #else |
42030fb2 | 2962 | arg1 = scm_list_1 (arg1); |
f3d2630a | 2963 | #endif |
42030fb2 DH |
2964 | goto type_dispatch; |
2965 | } | |
2966 | else if (!SCM_I_OPERATORP (proc)) | |
2967 | goto badfun; | |
2968 | else | |
2969 | { | |
2970 | arg2 = arg1; | |
2971 | arg1 = proc; | |
2972 | proc = (SCM_I_ENTITYP (proc) | |
2973 | ? SCM_ENTITY_PROCEDURE (proc) | |
2974 | : SCM_OPERATOR_PROCEDURE (proc)); | |
0c32d76c | 2975 | #ifdef DEVAL |
42030fb2 DH |
2976 | debug.info->a.args = scm_cons (arg1, debug.info->a.args); |
2977 | debug.info->a.proc = proc; | |
0c32d76c | 2978 | #endif |
42030fb2 DH |
2979 | if (SCM_NIMP (proc)) |
2980 | goto evap2; | |
2981 | else | |
2982 | goto badfun; | |
2983 | } | |
2984 | case scm_tc7_subr_2: | |
2985 | case scm_tc7_subr_0: | |
2986 | case scm_tc7_subr_3: | |
2987 | case scm_tc7_lsubr_2: | |
ab1f1094 | 2988 | scm_wrong_num_args (proc); |
42030fb2 DH |
2989 | default: |
2990 | goto badfun; | |
2991 | } | |
2992 | } | |
42030fb2 DH |
2993 | if (SCM_CONSP (x)) |
2994 | arg2 = EVALCAR (x, env); | |
2995 | else | |
ab1f1094 | 2996 | scm_wrong_num_args (proc); |
bd987b8e | 2997 | |
42030fb2 | 2998 | { /* have two or more arguments */ |
6dbd0af5 | 2999 | #ifdef DEVAL |
42030fb2 | 3000 | debug.info->a.args = scm_list_2 (arg1, arg2); |
6dbd0af5 | 3001 | #endif |
42030fb2 DH |
3002 | x = SCM_CDR (x); |
3003 | if (SCM_NULLP (x)) { | |
3004 | ENTER_APPLY; | |
3005 | evap2: | |
3006 | switch (SCM_TYP7 (proc)) | |
3007 | { /* have two arguments */ | |
3008 | case scm_tc7_subr_2: | |
3009 | case scm_tc7_subr_2o: | |
3010 | RETURN (SCM_SUBRF (proc) (arg1, arg2)); | |
3011 | case scm_tc7_lsubr: | |
0f2d19dd | 3012 | #ifdef DEVAL |
42030fb2 | 3013 | RETURN (SCM_SUBRF (proc) (debug.info->a.args)); |
6dbd0af5 | 3014 | #else |
42030fb2 DH |
3015 | RETURN (SCM_SUBRF (proc) (scm_list_2 (arg1, arg2))); |
3016 | #endif | |
3017 | case scm_tc7_lsubr_2: | |
3018 | RETURN (SCM_SUBRF (proc) (arg1, arg2, SCM_EOL)); | |
3019 | case scm_tc7_rpsubr: | |
3020 | case scm_tc7_asubr: | |
3021 | RETURN (SCM_SUBRF (proc) (arg1, arg2)); | |
3022 | case scm_tc7_smob: | |
3023 | if (!SCM_SMOB_APPLICABLE_P (proc)) | |
3024 | goto badfun; | |
3025 | RETURN (SCM_SMOB_APPLY_2 (proc, arg1, arg2)); | |
3026 | cclon: | |
3027 | case scm_tc7_cclo: | |
0f2d19dd | 3028 | #ifdef DEVAL |
42030fb2 DH |
3029 | RETURN (SCM_APPLY (SCM_CCLO_SUBR (proc), |
3030 | scm_cons (proc, debug.info->a.args), | |
3031 | SCM_EOL)); | |
0f2d19dd | 3032 | #else |
42030fb2 DH |
3033 | RETURN (SCM_APPLY (SCM_CCLO_SUBR (proc), |
3034 | scm_cons2 (proc, arg1, | |
3035 | scm_cons (arg2, | |
3036 | scm_eval_args (x, | |
3037 | env, | |
3038 | proc))), | |
3039 | SCM_EOL)); | |
3040 | #endif | |
3041 | case scm_tcs_struct: | |
3042 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) | |
3043 | { | |
3044 | x = SCM_ENTITY_PROCEDURE (proc); | |
3045 | #ifdef DEVAL | |
3046 | arg1 = debug.info->a.args; | |
3047 | #else | |
3048 | arg1 = scm_list_2 (arg1, arg2); | |
6dbd0af5 | 3049 | #endif |
42030fb2 DH |
3050 | goto type_dispatch; |
3051 | } | |
3052 | else if (!SCM_I_OPERATORP (proc)) | |
3053 | goto badfun; | |
3054 | else | |
3055 | { | |
3056 | operatorn: | |
f3d2630a | 3057 | #ifdef DEVAL |
42030fb2 DH |
3058 | RETURN (SCM_APPLY (SCM_I_ENTITYP (proc) |
3059 | ? SCM_ENTITY_PROCEDURE (proc) | |
3060 | : SCM_OPERATOR_PROCEDURE (proc), | |
3061 | scm_cons (proc, debug.info->a.args), | |
3062 | SCM_EOL)); | |
f3d2630a | 3063 | #else |
42030fb2 DH |
3064 | RETURN (SCM_APPLY (SCM_I_ENTITYP (proc) |
3065 | ? SCM_ENTITY_PROCEDURE (proc) | |
3066 | : SCM_OPERATOR_PROCEDURE (proc), | |
3067 | scm_cons2 (proc, arg1, | |
3068 | scm_cons (arg2, | |
3069 | scm_eval_args (x, | |
3070 | env, | |
3071 | proc))), | |
3072 | SCM_EOL)); | |
f3d2630a | 3073 | #endif |
42030fb2 DH |
3074 | } |
3075 | case scm_tc7_subr_0: | |
3076 | case scm_tc7_cxr: | |
3077 | case scm_tc7_subr_1o: | |
3078 | case scm_tc7_subr_1: | |
3079 | case scm_tc7_subr_3: | |
ab1f1094 | 3080 | scm_wrong_num_args (proc); |
42030fb2 | 3081 | default: |
9b07e212 | 3082 | goto badfun; |
42030fb2 DH |
3083 | case scm_tc7_pws: |
3084 | proc = SCM_PROCEDURE (proc); | |
3085 | #ifdef DEVAL | |
3086 | debug.info->a.proc = proc; | |
3087 | #endif | |
3088 | if (!SCM_CLOSUREP (proc)) | |
3089 | goto evap2; | |
3090 | if (scm_badformalsp (proc, 2)) | |
3091 | goto umwrongnumargs; | |
3092 | case scm_tcs_closures: | |
3093 | /* clos2: */ | |
0c32d76c | 3094 | #ifdef DEVAL |
42030fb2 DH |
3095 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), |
3096 | debug.info->a.args, | |
3097 | SCM_ENV (proc)); | |
195847fa | 3098 | #else |
42030fb2 DH |
3099 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), |
3100 | scm_list_2 (arg1, arg2), SCM_ENV (proc)); | |
195847fa | 3101 | #endif |
42030fb2 DH |
3102 | x = SCM_CLOSURE_BODY (proc); |
3103 | goto nontoplevel_begin; | |
3104 | } | |
3105 | } | |
42030fb2 | 3106 | if (!SCM_CONSP (x)) |
ab1f1094 | 3107 | scm_wrong_num_args (proc); |
42030fb2 DH |
3108 | #ifdef DEVAL |
3109 | debug.info->a.args = scm_cons2 (arg1, arg2, | |
3110 | deval_args (x, env, proc, | |
3111 | SCM_CDRLOC (SCM_CDR (debug.info->a.args)))); | |
3112 | #endif | |
3113 | ENTER_APPLY; | |
3114 | evap3: | |
3115 | switch (SCM_TYP7 (proc)) | |
3116 | { /* have 3 or more arguments */ | |
3117 | #ifdef DEVAL | |
6dbd0af5 | 3118 | case scm_tc7_subr_3: |
ab1f1094 DH |
3119 | if (!SCM_NULLP (SCM_CDR (x))) |
3120 | scm_wrong_num_args (proc); | |
3121 | else | |
3122 | RETURN (SCM_SUBRF (proc) (arg1, arg2, | |
3123 | SCM_CADDR (debug.info->a.args))); | |
42030fb2 DH |
3124 | case scm_tc7_asubr: |
3125 | arg1 = SCM_SUBRF(proc)(arg1, arg2); | |
3126 | arg2 = SCM_CDDR (debug.info->a.args); | |
3127 | do | |
3128 | { | |
3129 | arg1 = SCM_SUBRF(proc)(arg1, SCM_CAR (arg2)); | |
3130 | arg2 = SCM_CDR (arg2); | |
3131 | } | |
3132 | while (SCM_NIMP (arg2)); | |
3133 | RETURN (arg1); | |
3134 | case scm_tc7_rpsubr: | |
3135 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg1, arg2))) | |
3136 | RETURN (SCM_BOOL_F); | |
3137 | arg1 = SCM_CDDR (debug.info->a.args); | |
3138 | do | |
3139 | { | |
3140 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg2, SCM_CAR (arg1)))) | |
3141 | RETURN (SCM_BOOL_F); | |
3142 | arg2 = SCM_CAR (arg1); | |
3143 | arg1 = SCM_CDR (arg1); | |
3144 | } | |
3145 | while (SCM_NIMP (arg1)); | |
3146 | RETURN (SCM_BOOL_T); | |
3147 | case scm_tc7_lsubr_2: | |
3148 | RETURN (SCM_SUBRF (proc) (arg1, arg2, | |
3149 | SCM_CDDR (debug.info->a.args))); | |
3150 | case scm_tc7_lsubr: | |
3151 | RETURN (SCM_SUBRF (proc) (debug.info->a.args)); | |
3152 | case scm_tc7_smob: | |
3153 | if (!SCM_SMOB_APPLICABLE_P (proc)) | |
3154 | goto badfun; | |
3155 | RETURN (SCM_SMOB_APPLY_3 (proc, arg1, arg2, | |
3156 | SCM_CDDR (debug.info->a.args))); | |
3157 | case scm_tc7_cclo: | |
3158 | goto cclon; | |
002f1a5d MD |
3159 | case scm_tc7_pws: |
3160 | proc = SCM_PROCEDURE (proc); | |
002f1a5d | 3161 | debug.info->a.proc = proc; |
002f1a5d | 3162 | if (!SCM_CLOSUREP (proc)) |
42030fb2 DH |
3163 | goto evap3; |
3164 | if (scm_badargsp (SCM_CLOSURE_FORMALS (proc), debug.info->a.args)) | |
002f1a5d | 3165 | goto umwrongnumargs; |
6dbd0af5 | 3166 | case scm_tcs_closures: |
42030fb2 | 3167 | SCM_SET_ARGSREADY (debug); |
726d810a | 3168 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), |
da7f71d7 MD |
3169 | debug.info->a.args, |
3170 | SCM_ENV (proc)); | |
f9450cdb DH |
3171 | x = SCM_CLOSURE_BODY (proc); |
3172 | goto nontoplevel_begin; | |
6dbd0af5 | 3173 | #else /* DEVAL */ |
42030fb2 | 3174 | case scm_tc7_subr_3: |
ab1f1094 DH |
3175 | if (!SCM_NULLP (SCM_CDR (x))) |
3176 | scm_wrong_num_args (proc); | |
3177 | else | |
3178 | RETURN (SCM_SUBRF (proc) (arg1, arg2, EVALCAR (x, env))); | |
42030fb2 DH |
3179 | case scm_tc7_asubr: |
3180 | arg1 = SCM_SUBRF (proc) (arg1, arg2); | |
3181 | do | |
3182 | { | |
3183 | arg1 = SCM_SUBRF(proc)(arg1, EVALCAR(x, env)); | |
3184 | x = SCM_CDR(x); | |
3185 | } | |
3186 | while (SCM_NIMP (x)); | |
3187 | RETURN (arg1); | |
3188 | case scm_tc7_rpsubr: | |
3189 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg1, arg2))) | |
3190 | RETURN (SCM_BOOL_F); | |
3191 | do | |
3192 | { | |
3193 | arg1 = EVALCAR (x, env); | |
3194 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg2, arg1))) | |
3195 | RETURN (SCM_BOOL_F); | |
3196 | arg2 = arg1; | |
3197 | x = SCM_CDR (x); | |
3198 | } | |
3199 | while (SCM_NIMP (x)); | |
3200 | RETURN (SCM_BOOL_T); | |
3201 | case scm_tc7_lsubr_2: | |
3202 | RETURN (SCM_SUBRF (proc) (arg1, arg2, scm_eval_args (x, env, proc))); | |
3203 | case scm_tc7_lsubr: | |
3204 | RETURN (SCM_SUBRF (proc) (scm_cons2 (arg1, | |
3205 | arg2, | |
3206 | scm_eval_args (x, env, proc)))); | |
3207 | case scm_tc7_smob: | |
3208 | if (!SCM_SMOB_APPLICABLE_P (proc)) | |
3209 | goto badfun; | |
3210 | RETURN (SCM_SMOB_APPLY_3 (proc, arg1, arg2, | |
3211 | scm_eval_args (x, env, proc))); | |
3212 | case scm_tc7_cclo: | |
3213 | goto cclon; | |
3214 | case scm_tc7_pws: | |
3215 | proc = SCM_PROCEDURE (proc); | |
3216 | if (!SCM_CLOSUREP (proc)) | |
3217 | goto evap3; | |
da7f71d7 | 3218 | { |
42030fb2 DH |
3219 | SCM formals = SCM_CLOSURE_FORMALS (proc); |
3220 | if (SCM_NULLP (formals) | |
3221 | || (SCM_CONSP (formals) | |
3222 | && (SCM_NULLP (SCM_CDR (formals)) | |
3223 | || (SCM_CONSP (SCM_CDR (formals)) | |
3224 | && scm_badargsp (SCM_CDDR (formals), x))))) | |
3225 | goto umwrongnumargs; | |
da7f71d7 | 3226 | } |
42030fb2 | 3227 | case scm_tcs_closures: |
6dbd0af5 | 3228 | #ifdef DEVAL |
42030fb2 | 3229 | SCM_SET_ARGSREADY (debug); |
6dbd0af5 | 3230 | #endif |
42030fb2 DH |
3231 | env = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), |
3232 | scm_cons2 (arg1, | |
3233 | arg2, | |
3234 | scm_eval_args (x, env, proc)), | |
3235 | SCM_ENV (proc)); | |
3236 | x = SCM_CLOSURE_BODY (proc); | |
3237 | goto nontoplevel_begin; | |
0f2d19dd | 3238 | #endif /* DEVAL */ |
42030fb2 DH |
3239 | case scm_tcs_struct: |
3240 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) | |
3241 | { | |
f3d2630a | 3242 | #ifdef DEVAL |
42030fb2 | 3243 | arg1 = debug.info->a.args; |
f3d2630a | 3244 | #else |
42030fb2 | 3245 | arg1 = scm_cons2 (arg1, arg2, scm_eval_args (x, env, proc)); |
f3d2630a | 3246 | #endif |
42030fb2 DH |
3247 | x = SCM_ENTITY_PROCEDURE (proc); |
3248 | goto type_dispatch; | |
3249 | } | |
3250 | else if (!SCM_I_OPERATORP (proc)) | |
3251 | goto badfun; | |
3252 | else | |
3253 | goto operatorn; | |
3254 | case scm_tc7_subr_2: | |
3255 | case scm_tc7_subr_1o: | |
3256 | case scm_tc7_subr_2o: | |
3257 | case scm_tc7_subr_0: | |
3258 | case scm_tc7_cxr: | |
3259 | case scm_tc7_subr_1: | |
ab1f1094 | 3260 | scm_wrong_num_args (proc); |
42030fb2 | 3261 | default: |
9b07e212 | 3262 | goto badfun; |
42030fb2 DH |
3263 | } |
3264 | } | |
0f2d19dd JB |
3265 | } |
3266 | #ifdef DEVAL | |
6dbd0af5 | 3267 | exit: |
5132eef0 | 3268 | if (scm_check_exit_p && SCM_TRAPS_P) |
b7ff98dd | 3269 | if (SCM_EXIT_FRAME_P || (SCM_TRACE_P && SCM_TRACED_FRAME_P (debug))) |
6dbd0af5 | 3270 | { |
b7ff98dd MD |
3271 | SCM_CLEAR_TRACED_FRAME (debug); |
3272 | if (SCM_CHEAPTRAPS_P) | |
dff98306 | 3273 | arg1 = scm_make_debugobj (&debug); |
6dbd0af5 MD |
3274 | else |
3275 | { | |
5f144b10 GH |
3276 | int first; |
3277 | SCM val = scm_make_continuation (&first); | |
e050d4f8 | 3278 | |
5f144b10 | 3279 | if (first) |
dff98306 | 3280 | arg1 = val; |
5f144b10 | 3281 | else |
6dbd0af5 | 3282 | { |
5f144b10 | 3283 | proc = val; |
6dbd0af5 MD |
3284 | goto ret; |
3285 | } | |
3286 | } | |
d95c0b76 | 3287 | SCM_TRAPS_P = 0; |
dff98306 | 3288 | scm_call_3 (SCM_EXIT_FRAME_HDLR, scm_sym_exit_frame, arg1, proc); |
d95c0b76 | 3289 | SCM_TRAPS_P = 1; |
6dbd0af5 MD |
3290 | } |
3291 | ret: | |
1646d37b | 3292 | scm_last_debug_frame = debug.prev; |
0f2d19dd JB |
3293 | return proc; |
3294 | #endif | |
3295 | } | |
3296 | ||
6dbd0af5 MD |
3297 | |
3298 | /* SECTION: This code is compiled once. | |
3299 | */ | |
3300 | ||
0f2d19dd JB |
3301 | #ifndef DEVAL |
3302 | ||
fdc28395 KN |
3303 | \f |
3304 | /* Simple procedure calls | |
3305 | */ | |
3306 | ||
3307 | SCM | |
3308 | scm_call_0 (SCM proc) | |
3309 | { | |
3310 | return scm_apply (proc, SCM_EOL, SCM_EOL); | |
3311 | } | |
3312 | ||
3313 | SCM | |
3314 | scm_call_1 (SCM proc, SCM arg1) | |
3315 | { | |
3316 | return scm_apply (proc, arg1, scm_listofnull); | |
3317 | } | |
3318 | ||
3319 | SCM | |
3320 | scm_call_2 (SCM proc, SCM arg1, SCM arg2) | |
3321 | { | |
3322 | return scm_apply (proc, arg1, scm_cons (arg2, scm_listofnull)); | |
3323 | } | |
3324 | ||
3325 | SCM | |
3326 | scm_call_3 (SCM proc, SCM arg1, SCM arg2, SCM arg3) | |
3327 | { | |
3328 | return scm_apply (proc, arg1, scm_cons2 (arg2, arg3, scm_listofnull)); | |
3329 | } | |
3330 | ||
d95c0b76 NJ |
3331 | SCM |
3332 | scm_call_4 (SCM proc, SCM arg1, SCM arg2, SCM arg3, SCM arg4) | |
3333 | { | |
3334 | return scm_apply (proc, arg1, scm_cons2 (arg2, arg3, | |
3335 | scm_cons (arg4, scm_listofnull))); | |
3336 | } | |
3337 | ||
fdc28395 KN |
3338 | /* Simple procedure applies |
3339 | */ | |
3340 | ||
3341 | SCM | |
3342 | scm_apply_0 (SCM proc, SCM args) | |
3343 | { | |
3344 | return scm_apply (proc, args, SCM_EOL); | |
3345 | } | |
3346 | ||
3347 | SCM | |
3348 | scm_apply_1 (SCM proc, SCM arg1, SCM args) | |
3349 | { | |
3350 | return scm_apply (proc, scm_cons (arg1, args), SCM_EOL); | |
3351 | } | |
3352 | ||
3353 | SCM | |
3354 | scm_apply_2 (SCM proc, SCM arg1, SCM arg2, SCM args) | |
3355 | { | |
3356 | return scm_apply (proc, scm_cons2 (arg1, arg2, args), SCM_EOL); | |
3357 | } | |
3358 | ||
3359 | SCM | |
3360 | scm_apply_3 (SCM proc, SCM arg1, SCM arg2, SCM arg3, SCM args) | |
3361 | { | |
3362 | return scm_apply (proc, scm_cons (arg1, scm_cons2 (arg2, arg3, args)), | |
3363 | SCM_EOL); | |
3364 | } | |
3365 | ||
82a2622a | 3366 | /* This code processes the arguments to apply: |
b145c172 JB |
3367 | |
3368 | (apply PROC ARG1 ... ARGS) | |
3369 | ||
82a2622a JB |
3370 | Given a list (ARG1 ... ARGS), this function conses the ARG1 |
3371 | ... arguments onto the front of ARGS, and returns the resulting | |
3372 | list. Note that ARGS is a list; thus, the argument to this | |
3373 | function is a list whose last element is a list. | |
3374 | ||
3375 | Apply calls this function, and applies PROC to the elements of the | |
b145c172 JB |
3376 | result. apply:nconc2last takes care of building the list of |
3377 | arguments, given (ARG1 ... ARGS). | |
3378 | ||
82a2622a JB |
3379 | Rather than do new consing, apply:nconc2last destroys its argument. |
3380 | On that topic, this code came into my care with the following | |
3381 | beautifully cryptic comment on that topic: "This will only screw | |
3382 | you if you do (scm_apply scm_apply '( ... ))" If you know what | |
3383 | they're referring to, send me a patch to this comment. */ | |
b145c172 | 3384 | |
3b3b36dd | 3385 | SCM_DEFINE (scm_nconc2last, "apply:nconc2last", 1, 0, 0, |
b3f26b14 MG |
3386 | (SCM lst), |
3387 | "Given a list (@var{arg1} @dots{} @var{args}), this function\n" | |
3388 | "conses the @var{arg1} @dots{} arguments onto the front of\n" | |
3389 | "@var{args}, and returns the resulting list. Note that\n" | |
3390 | "@var{args} is a list; thus, the argument to this function is\n" | |
3391 | "a list whose last element is a list.\n" | |
3392 | "Note: Rather than do new consing, @code{apply:nconc2last}\n" | |
3393 | "destroys its argument, so use with care.") | |
1bbd0b84 | 3394 | #define FUNC_NAME s_scm_nconc2last |
0f2d19dd JB |
3395 | { |
3396 | SCM *lloc; | |
34d19ef6 | 3397 | SCM_VALIDATE_NONEMPTYLIST (1, lst); |
0f2d19dd | 3398 | lloc = &lst; |
c96d76b8 NJ |
3399 | while (!SCM_NULLP (SCM_CDR (*lloc))) /* Perhaps should be |
3400 | SCM_NULL_OR_NIL_P, but not | |
3401 | needed in 99.99% of cases, | |
3402 | and it could seriously hurt | |
3403 | performance. - Neil */ | |
a23afe53 | 3404 | lloc = SCM_CDRLOC (*lloc); |
1bbd0b84 | 3405 | SCM_ASSERT (scm_ilength (SCM_CAR (*lloc)) >= 0, lst, SCM_ARG1, FUNC_NAME); |
0f2d19dd JB |
3406 | *lloc = SCM_CAR (*lloc); |
3407 | return lst; | |
3408 | } | |
1bbd0b84 | 3409 | #undef FUNC_NAME |
0f2d19dd JB |
3410 | |
3411 | #endif /* !DEVAL */ | |
3412 | ||
6dbd0af5 MD |
3413 | |
3414 | /* SECTION: When DEVAL is defined this code yields scm_dapply. | |
3415 | * It is compiled twice. | |
3416 | */ | |
3417 | ||
0f2d19dd | 3418 | #if 0 |
0f2d19dd | 3419 | SCM |
6e8d25a6 | 3420 | scm_apply (SCM proc, SCM arg1, SCM args) |
0f2d19dd JB |
3421 | {} |
3422 | #endif | |
3423 | ||
3424 | #if 0 | |
0f2d19dd | 3425 | SCM |
6e8d25a6 GB |
3426 | scm_dapply (SCM proc, SCM arg1, SCM args) |
3427 | { /* empty */ } | |
0f2d19dd JB |
3428 | #endif |
3429 | ||
1cc91f1b | 3430 | |
82a2622a JB |
3431 | /* Apply a function to a list of arguments. |
3432 | ||
3433 | This function is exported to the Scheme level as taking two | |
3434 | required arguments and a tail argument, as if it were: | |
3435 | (lambda (proc arg1 . args) ...) | |
3436 | Thus, if you just have a list of arguments to pass to a procedure, | |
3437 | pass the list as ARG1, and '() for ARGS. If you have some fixed | |
3438 | args, pass the first as ARG1, then cons any remaining fixed args | |
3439 | onto the front of your argument list, and pass that as ARGS. */ | |
3440 | ||
0f2d19dd | 3441 | SCM |
1bbd0b84 | 3442 | SCM_APPLY (SCM proc, SCM arg1, SCM args) |
0f2d19dd JB |
3443 | { |
3444 | #ifdef DEBUG_EXTENSIONS | |
3445 | #ifdef DEVAL | |
92c2555f MV |
3446 | scm_t_debug_frame debug; |
3447 | scm_t_debug_info debug_vect_body; | |
1646d37b | 3448 | debug.prev = scm_last_debug_frame; |
b7ff98dd | 3449 | debug.status = SCM_APPLYFRAME; |
c0ab1b8d | 3450 | debug.vect = &debug_vect_body; |
6dbd0af5 MD |
3451 | debug.vect[0].a.proc = proc; |
3452 | debug.vect[0].a.args = SCM_EOL; | |
1646d37b | 3453 | scm_last_debug_frame = &debug; |
0f2d19dd | 3454 | #else |
b7ff98dd | 3455 | if (SCM_DEBUGGINGP) |
0f2d19dd JB |
3456 | return scm_dapply (proc, arg1, args); |
3457 | #endif | |
3458 | #endif | |
3459 | ||
3460 | SCM_ASRTGO (SCM_NIMP (proc), badproc); | |
82a2622a JB |
3461 | |
3462 | /* If ARGS is the empty list, then we're calling apply with only two | |
3463 | arguments --- ARG1 is the list of arguments for PROC. Whatever | |
3464 | the case, futz with things so that ARG1 is the first argument to | |
3465 | give to PROC (or SCM_UNDEFINED if no args), and ARGS contains the | |
30000774 JB |
3466 | rest. |
3467 | ||
3468 | Setting the debug apply frame args this way is pretty messy. | |
3469 | Perhaps we should store arg1 and args directly in the frame as | |
3470 | received, and let scm_frame_arguments unpack them, because that's | |
3471 | a relatively rare operation. This works for now; if the Guile | |
3472 | developer archives are still around, see Mikael's post of | |
3473 | 11-Apr-97. */ | |
0f2d19dd JB |
3474 | if (SCM_NULLP (args)) |
3475 | { | |
3476 | if (SCM_NULLP (arg1)) | |
30000774 JB |
3477 | { |
3478 | arg1 = SCM_UNDEFINED; | |
3479 | #ifdef DEVAL | |
3480 | debug.vect[0].a.args = SCM_EOL; | |
3481 | #endif | |
3482 | } | |
0f2d19dd JB |
3483 | else |
3484 | { | |
30000774 JB |
3485 | #ifdef DEVAL |
3486 | debug.vect[0].a.args = arg1; | |
3487 | #endif | |
0f2d19dd JB |
3488 | args = SCM_CDR (arg1); |
3489 | arg1 = SCM_CAR (arg1); | |
3490 | } | |
3491 | } | |
3492 | else | |
3493 | { | |
0f2d19dd | 3494 | args = scm_nconc2last (args); |
30000774 JB |
3495 | #ifdef DEVAL |
3496 | debug.vect[0].a.args = scm_cons (arg1, args); | |
3497 | #endif | |
0f2d19dd | 3498 | } |
0f2d19dd | 3499 | #ifdef DEVAL |
b6d75948 | 3500 | if (SCM_ENTER_FRAME_P && SCM_TRAPS_P) |
6dbd0af5 MD |
3501 | { |
3502 | SCM tmp; | |
b7ff98dd | 3503 | if (SCM_CHEAPTRAPS_P) |
c0ab1b8d | 3504 | tmp = scm_make_debugobj (&debug); |
6dbd0af5 MD |
3505 | else |
3506 | { | |
5f144b10 GH |
3507 | int first; |
3508 | ||
3509 | tmp = scm_make_continuation (&first); | |
3510 | if (!first) | |
6dbd0af5 MD |
3511 | goto entap; |
3512 | } | |
d95c0b76 NJ |
3513 | SCM_TRAPS_P = 0; |
3514 | scm_call_2 (SCM_ENTER_FRAME_HDLR, scm_sym_enter_frame, tmp); | |
3515 | SCM_TRAPS_P = 1; | |
6dbd0af5 MD |
3516 | } |
3517 | entap: | |
3518 | ENTER_APPLY; | |
3519 | #endif | |
6dbd0af5 | 3520 | tail: |
0f2d19dd JB |
3521 | switch (SCM_TYP7 (proc)) |
3522 | { | |
3523 | case scm_tc7_subr_2o: | |
3524 | args = SCM_NULLP (args) ? SCM_UNDEFINED : SCM_CAR (args); | |
ddea3325 | 3525 | RETURN (SCM_SUBRF (proc) (arg1, args)); |
0f2d19dd | 3526 | case scm_tc7_subr_2: |
ab1f1094 DH |
3527 | if (SCM_NULLP (args) || !SCM_NULLP (SCM_CDR (args))) |
3528 | scm_wrong_num_args (proc); | |
0f2d19dd | 3529 | args = SCM_CAR (args); |
ddea3325 | 3530 | RETURN (SCM_SUBRF (proc) (arg1, args)); |
0f2d19dd | 3531 | case scm_tc7_subr_0: |
ab1f1094 DH |
3532 | if (!SCM_UNBNDP (arg1)) |
3533 | scm_wrong_num_args (proc); | |
3534 | else | |
3535 | RETURN (SCM_SUBRF (proc) ()); | |
0f2d19dd | 3536 | case scm_tc7_subr_1: |
ab1f1094 DH |
3537 | if (SCM_UNBNDP (arg1)) |
3538 | scm_wrong_num_args (proc); | |
0f2d19dd | 3539 | case scm_tc7_subr_1o: |
ab1f1094 DH |
3540 | if (!SCM_NULLP (args)) |
3541 | scm_wrong_num_args (proc); | |
3542 | else | |
3543 | RETURN (SCM_SUBRF (proc) (arg1)); | |
0f2d19dd | 3544 | case scm_tc7_cxr: |
ab1f1094 DH |
3545 | if (SCM_UNBNDP (arg1) || !SCM_NULLP (args)) |
3546 | scm_wrong_num_args (proc); | |
0f2d19dd JB |
3547 | if (SCM_SUBRF (proc)) |
3548 | { | |
6dbd0af5 MD |
3549 | if (SCM_INUMP (arg1)) |
3550 | { | |
f8de44c1 | 3551 | RETURN (scm_make_real (SCM_DSUBRF (proc) ((double) SCM_INUM (arg1)))); |
6dbd0af5 | 3552 | } |
01f11e02 | 3553 | else if (SCM_REALP (arg1)) |
6dbd0af5 | 3554 | { |
eb42e2f0 | 3555 | RETURN (scm_make_real (SCM_DSUBRF (proc) (SCM_REAL_VALUE (arg1)))); |
6dbd0af5 | 3556 | } |
0f2d19dd | 3557 | #ifdef SCM_BIGDIG |
01f11e02 | 3558 | else if (SCM_BIGP (arg1)) |
ddea3325 | 3559 | RETURN (scm_make_real (SCM_DSUBRF (proc) (scm_i_big2dbl (arg1)))); |
0f2d19dd | 3560 | #endif |
9de33deb | 3561 | SCM_WTA_DISPATCH_1 (*SCM_SUBR_GENERIC (proc), arg1, |
3db4adfc | 3562 | SCM_ARG1, SCM_SYMBOL_CHARS (SCM_SNAME (proc))); |
0f2d19dd | 3563 | } |
3201d763 | 3564 | proc = SCM_SNAME (proc); |
0f2d19dd | 3565 | { |
b5c2579a | 3566 | char *chrs = SCM_SYMBOL_CHARS (proc) + SCM_SYMBOL_LENGTH (proc) - 1; |
0f2d19dd JB |
3567 | while ('c' != *--chrs) |
3568 | { | |
0c95b57d | 3569 | SCM_ASSERT (SCM_CONSP (arg1), |
3db4adfc | 3570 | arg1, SCM_ARG1, SCM_SYMBOL_CHARS (proc)); |
0f2d19dd JB |
3571 | arg1 = ('a' == *chrs) ? SCM_CAR (arg1) : SCM_CDR (arg1); |
3572 | } | |
ddea3325 | 3573 | RETURN (arg1); |
0f2d19dd JB |
3574 | } |
3575 | case scm_tc7_subr_3: | |
ab1f1094 DH |
3576 | if (SCM_NULLP (args) |
3577 | || SCM_NULLP (SCM_CDR (args)) | |
3578 | || !SCM_NULLP (SCM_CDDR (args))) | |
3579 | scm_wrong_num_args (proc); | |
3580 | else | |
3581 | RETURN (SCM_SUBRF (proc) (arg1, SCM_CAR (args), SCM_CADR (args))); | |
0f2d19dd JB |
3582 | case scm_tc7_lsubr: |
3583 | #ifdef DEVAL | |
ddea3325 | 3584 | RETURN (SCM_SUBRF (proc) (SCM_UNBNDP (arg1) ? SCM_EOL : debug.vect[0].a.args)); |
0f2d19dd | 3585 | #else |
ddea3325 | 3586 | RETURN (SCM_SUBRF (proc) (SCM_UNBNDP (arg1) ? SCM_EOL : scm_cons (arg1, args))); |
0f2d19dd JB |
3587 | #endif |
3588 | case scm_tc7_lsubr_2: | |
ab1f1094 DH |
3589 | if (!SCM_CONSP (args)) |
3590 | scm_wrong_num_args (proc); | |
3591 | else | |
3592 | RETURN (SCM_SUBRF (proc) (arg1, SCM_CAR (args), SCM_CDR (args))); | |
0f2d19dd JB |
3593 | case scm_tc7_asubr: |
3594 | if (SCM_NULLP (args)) | |
ddea3325 | 3595 | RETURN (SCM_SUBRF (proc) (arg1, SCM_UNDEFINED)); |
0f2d19dd JB |
3596 | while (SCM_NIMP (args)) |
3597 | { | |
3598 | SCM_ASSERT (SCM_CONSP (args), args, SCM_ARG2, "apply"); | |
3599 | arg1 = SCM_SUBRF (proc) (arg1, SCM_CAR (args)); | |
3600 | args = SCM_CDR (args); | |
3601 | } | |
3602 | RETURN (arg1); | |
3603 | case scm_tc7_rpsubr: | |
3604 | if (SCM_NULLP (args)) | |
3605 | RETURN (SCM_BOOL_T); | |
3606 | while (SCM_NIMP (args)) | |
3607 | { | |
3608 | SCM_ASSERT (SCM_CONSP (args), args, SCM_ARG2, "apply"); | |
3609 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg1, SCM_CAR (args)))) | |
3610 | RETURN (SCM_BOOL_F); | |
3611 | arg1 = SCM_CAR (args); | |
3612 | args = SCM_CDR (args); | |
3613 | } | |
3614 | RETURN (SCM_BOOL_T); | |
3615 | case scm_tcs_closures: | |
3616 | #ifdef DEVAL | |
6dbd0af5 | 3617 | arg1 = (SCM_UNBNDP (arg1) ? SCM_EOL : debug.vect[0].a.args); |
0f2d19dd JB |
3618 | #else |
3619 | arg1 = (SCM_UNBNDP (arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
3620 | #endif | |
726d810a | 3621 | if (scm_badargsp (SCM_CLOSURE_FORMALS (proc), arg1)) |
ab1f1094 | 3622 | scm_wrong_num_args (proc); |
1609038c MD |
3623 | |
3624 | /* Copy argument list */ | |
3625 | if (SCM_IMP (arg1)) | |
3626 | args = arg1; | |
3627 | else | |
3628 | { | |
3629 | SCM tl = args = scm_cons (SCM_CAR (arg1), SCM_UNSPECIFIED); | |
cabe682c | 3630 | while (arg1 = SCM_CDR (arg1), SCM_CONSP (arg1)) |
1609038c MD |
3631 | { |
3632 | SCM_SETCDR (tl, scm_cons (SCM_CAR (arg1), | |
3633 | SCM_UNSPECIFIED)); | |
3634 | tl = SCM_CDR (tl); | |
3635 | } | |
3636 | SCM_SETCDR (tl, arg1); | |
3637 | } | |
3638 | ||
726d810a | 3639 | args = EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), args, SCM_ENV (proc)); |
f9450cdb | 3640 | proc = SCM_CLOSURE_BODY (proc); |
e791c18f MD |
3641 | again: |
3642 | arg1 = proc; | |
01f11e02 | 3643 | while (!SCM_NULLP (arg1 = SCM_CDR (arg1))) |
2ddb0920 MD |
3644 | { |
3645 | if (SCM_IMP (SCM_CAR (proc))) | |
3646 | { | |
3647 | if (SCM_ISYMP (SCM_CAR (proc))) | |
3648 | { | |
9bc4701c MD |
3649 | SOURCE_SECTION_START; |
3650 | /* check for race condition */ | |
3651 | if (SCM_ISYMP (SCM_CAR (proc))) | |
3652 | proc = scm_m_expand_body (proc, args); | |
3653 | SOURCE_SECTION_END; | |
e791c18f | 3654 | goto again; |
2ddb0920 | 3655 | } |
5280aaca | 3656 | else |
17fa3fcf | 3657 | SCM_VALIDATE_NON_EMPTY_COMBINATION (SCM_CAR (proc)); |
2ddb0920 MD |
3658 | } |
3659 | else | |
e791c18f MD |
3660 | SCM_CEVAL (SCM_CAR (proc), args); |
3661 | proc = arg1; | |
2ddb0920 | 3662 | } |
e791c18f | 3663 | RETURN (EVALCAR (proc, args)); |
0717dfd8 | 3664 | case scm_tc7_smob: |
68b06924 | 3665 | if (!SCM_SMOB_APPLICABLE_P (proc)) |
0717dfd8 | 3666 | goto badproc; |
afa38f6e | 3667 | if (SCM_UNBNDP (arg1)) |
ddea3325 | 3668 | RETURN (SCM_SMOB_APPLY_0 (proc)); |
afa38f6e | 3669 | else if (SCM_NULLP (args)) |
ddea3325 | 3670 | RETURN (SCM_SMOB_APPLY_1 (proc, arg1)); |
0717dfd8 | 3671 | else if (SCM_NULLP (SCM_CDR (args))) |
ddea3325 | 3672 | RETURN (SCM_SMOB_APPLY_2 (proc, arg1, SCM_CAR (args))); |
0717dfd8 | 3673 | else |
68b06924 | 3674 | RETURN (SCM_SMOB_APPLY_3 (proc, arg1, SCM_CAR (args), SCM_CDR (args))); |
0f2d19dd JB |
3675 | case scm_tc7_cclo: |
3676 | #ifdef DEVAL | |
6dbd0af5 MD |
3677 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : debug.vect[0].a.args); |
3678 | arg1 = proc; | |
3679 | proc = SCM_CCLO_SUBR (proc); | |
3680 | debug.vect[0].a.proc = proc; | |
3681 | debug.vect[0].a.args = scm_cons (arg1, args); | |
0f2d19dd JB |
3682 | #else |
3683 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
0f2d19dd JB |
3684 | arg1 = proc; |
3685 | proc = SCM_CCLO_SUBR (proc); | |
6dbd0af5 | 3686 | #endif |
0f2d19dd | 3687 | goto tail; |
89efbff4 MD |
3688 | case scm_tc7_pws: |
3689 | proc = SCM_PROCEDURE (proc); | |
3690 | #ifdef DEVAL | |
3691 | debug.vect[0].a.proc = proc; | |
3692 | #endif | |
3693 | goto tail; | |
904a077d | 3694 | case scm_tcs_struct: |
f3d2630a MD |
3695 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) |
3696 | { | |
3697 | #ifdef DEVAL | |
3698 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : debug.vect[0].a.args); | |
3699 | #else | |
3700 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
3701 | #endif | |
195847fa | 3702 | RETURN (scm_apply_generic (proc, args)); |
f3d2630a MD |
3703 | } |
3704 | else if (!SCM_I_OPERATORP (proc)) | |
9b07e212 MD |
3705 | goto badproc; |
3706 | else | |
da7f71d7 | 3707 | { |
504d99c5 | 3708 | /* operator */ |
da7f71d7 MD |
3709 | #ifdef DEVAL |
3710 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : debug.vect[0].a.args); | |
3711 | #else | |
3712 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
3713 | #endif | |
3714 | arg1 = proc; | |
195847fa MD |
3715 | proc = (SCM_I_ENTITYP (proc) |
3716 | ? SCM_ENTITY_PROCEDURE (proc) | |
3717 | : SCM_OPERATOR_PROCEDURE (proc)); | |
da7f71d7 MD |
3718 | #ifdef DEVAL |
3719 | debug.vect[0].a.proc = proc; | |
3720 | debug.vect[0].a.args = scm_cons (arg1, args); | |
3721 | #endif | |
195847fa MD |
3722 | if (SCM_NIMP (proc)) |
3723 | goto tail; | |
3724 | else | |
3725 | goto badproc; | |
da7f71d7 | 3726 | } |
0f2d19dd JB |
3727 | default: |
3728 | badproc: | |
db4b4ca6 | 3729 | scm_wrong_type_arg ("apply", SCM_ARG1, proc); |
0f2d19dd JB |
3730 | } |
3731 | #ifdef DEVAL | |
6dbd0af5 | 3732 | exit: |
5132eef0 | 3733 | if (scm_check_exit_p && SCM_TRAPS_P) |
b7ff98dd | 3734 | if (SCM_EXIT_FRAME_P || (SCM_TRACE_P && SCM_TRACED_FRAME_P (debug))) |
6dbd0af5 | 3735 | { |
b7ff98dd MD |
3736 | SCM_CLEAR_TRACED_FRAME (debug); |
3737 | if (SCM_CHEAPTRAPS_P) | |
c0ab1b8d | 3738 | arg1 = scm_make_debugobj (&debug); |
6dbd0af5 MD |
3739 | else |
3740 | { | |
5f144b10 GH |
3741 | int first; |
3742 | SCM val = scm_make_continuation (&first); | |
3743 | ||
3744 | if (first) | |
3745 | arg1 = val; | |
3746 | else | |
6dbd0af5 | 3747 | { |
5f144b10 | 3748 | proc = val; |
6dbd0af5 MD |
3749 | goto ret; |
3750 | } | |
3751 | } | |
d95c0b76 NJ |
3752 | SCM_TRAPS_P = 0; |
3753 | scm_call_3 (SCM_EXIT_FRAME_HDLR, scm_sym_exit_frame, arg1, proc); | |
3754 | SCM_TRAPS_P = 1; | |
6dbd0af5 MD |
3755 | } |
3756 | ret: | |
1646d37b | 3757 | scm_last_debug_frame = debug.prev; |
0f2d19dd JB |
3758 | return proc; |
3759 | #endif | |
3760 | } | |
3761 | ||
6dbd0af5 MD |
3762 | |
3763 | /* SECTION: The rest of this file is only read once. | |
3764 | */ | |
3765 | ||
0f2d19dd JB |
3766 | #ifndef DEVAL |
3767 | ||
504d99c5 MD |
3768 | /* Trampolines |
3769 | * | |
3770 | * Trampolines make it possible to move procedure application dispatch | |
3771 | * outside inner loops. The motivation was clean implementation of | |
3772 | * efficient replacements of R5RS primitives in SRFI-1. | |
3773 | * | |
3774 | * The semantics is clear: scm_trampoline_N returns an optimized | |
3775 | * version of scm_call_N (or NULL if the procedure isn't applicable | |
3776 | * on N args). | |
3777 | * | |
3778 | * Applying the optimization to map and for-each increased efficiency | |
3779 | * noticeably. For example, (map abs ls) is now 8 times faster than | |
3780 | * before. | |
3781 | */ | |
3782 | ||
3783 | static SCM | |
3784 | call_subr1_1 (SCM proc, SCM arg1) | |
3785 | { | |
3786 | return SCM_SUBRF (proc) (arg1); | |
3787 | } | |
3788 | ||
3789 | static SCM | |
3790 | call_lsubr_1 (SCM proc, SCM arg1) | |
3791 | { | |
3792 | return SCM_SUBRF (proc) (scm_list_1 (arg1)); | |
3793 | } | |
3794 | ||
3795 | static SCM | |
3796 | call_dsubr_1 (SCM proc, SCM arg1) | |
3797 | { | |
3798 | if (SCM_INUMP (arg1)) | |
3799 | { | |
3800 | RETURN (scm_make_real (SCM_DSUBRF (proc) ((double) SCM_INUM (arg1)))); | |
3801 | } | |
3802 | else if (SCM_REALP (arg1)) | |
3803 | { | |
3804 | RETURN (scm_make_real (SCM_DSUBRF (proc) (SCM_REAL_VALUE (arg1)))); | |
3805 | } | |
3806 | #ifdef SCM_BIGDIG | |
3807 | else if (SCM_BIGP (arg1)) | |
3808 | RETURN (scm_make_real (SCM_DSUBRF (proc) (scm_i_big2dbl (arg1)))); | |
3809 | #endif | |
3810 | SCM_WTA_DISPATCH_1 (*SCM_SUBR_GENERIC (proc), arg1, | |
3811 | SCM_ARG1, SCM_SYMBOL_CHARS (SCM_SNAME (proc))); | |
3812 | } | |
3813 | ||
3814 | static SCM | |
3815 | call_cxr_1 (SCM proc, SCM arg1) | |
3816 | { | |
3817 | proc = SCM_SNAME (proc); | |
3818 | { | |
3819 | char *chrs = SCM_SYMBOL_CHARS (proc) + SCM_SYMBOL_LENGTH (proc) - 1; | |
3820 | while ('c' != *--chrs) | |
3821 | { | |
3822 | SCM_ASSERT (SCM_CONSP (arg1), | |
3823 | arg1, SCM_ARG1, SCM_SYMBOL_CHARS (proc)); | |
3824 | arg1 = ('a' == *chrs) ? SCM_CAR (arg1) : SCM_CDR (arg1); | |
3825 | } | |
3826 | return (arg1); | |
3827 | } | |
3828 | } | |
3829 | ||
3830 | static SCM | |
3831 | call_closure_1 (SCM proc, SCM arg1) | |
3832 | { | |
3833 | return scm_eval_body (SCM_CLOSURE_BODY (proc), | |
3834 | SCM_EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), | |
3835 | scm_list_1 (arg1), | |
3836 | SCM_ENV (proc))); | |
3837 | } | |
3838 | ||
3839 | scm_t_trampoline_1 | |
3840 | scm_trampoline_1 (SCM proc) | |
3841 | { | |
3842 | if (SCM_IMP (proc)) | |
3843 | return 0; | |
3844 | if (SCM_DEBUGGINGP) | |
3845 | return scm_call_1; | |
3846 | switch (SCM_TYP7 (proc)) | |
3847 | { | |
3848 | case scm_tc7_subr_1: | |
3849 | case scm_tc7_subr_1o: | |
3850 | return call_subr1_1; | |
3851 | case scm_tc7_lsubr: | |
3852 | return call_lsubr_1; | |
3853 | case scm_tc7_cxr: | |
3854 | if (SCM_SUBRF (proc)) | |
3855 | return call_dsubr_1; | |
3856 | else | |
3857 | return call_cxr_1; | |
3858 | case scm_tcs_closures: | |
3859 | { | |
3860 | SCM formals = SCM_CLOSURE_FORMALS (proc); | |
3861 | if (!SCM_CONSP (formals) || SCM_NULLP (SCM_CDR (formals))) | |
3862 | return call_closure_1; | |
3863 | else | |
3864 | return 0; | |
3865 | } | |
3866 | case scm_tcs_struct: | |
3867 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) | |
3868 | return scm_call_generic_1; | |
3869 | else if (!SCM_I_OPERATORP (proc)) | |
3870 | return 0; | |
3871 | return scm_call_1; | |
3872 | case scm_tc7_smob: | |
3873 | if (SCM_SMOB_APPLICABLE_P (proc)) | |
3874 | return SCM_SMOB_DESCRIPTOR (proc).apply_1; | |
3875 | else | |
3876 | return 0; | |
3877 | /* fall through */ | |
3878 | case scm_tc7_asubr: | |
3879 | case scm_tc7_rpsubr: | |
3880 | case scm_tc7_cclo: | |
3881 | case scm_tc7_pws: | |
3882 | return scm_call_1; | |
3883 | default: | |
3884 | return 0; /* not applicable on one arg */ | |
3885 | } | |
3886 | } | |
3887 | ||
3888 | static SCM | |
3889 | call_subr2_2 (SCM proc, SCM arg1, SCM arg2) | |
3890 | { | |
3891 | return SCM_SUBRF (proc) (arg1, arg2); | |
3892 | } | |
3893 | ||
3894 | static SCM | |
3895 | call_lsubr_2 (SCM proc, SCM arg1, SCM arg2) | |
3896 | { | |
3897 | return SCM_SUBRF (proc) (scm_list_2 (arg1, arg2)); | |
3898 | } | |
3899 | ||
3900 | static SCM | |
3901 | call_closure_2 (SCM proc, SCM arg1, SCM arg2) | |
3902 | { | |
3903 | return scm_eval_body (SCM_CLOSURE_BODY (proc), | |
3904 | SCM_EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), | |
3905 | scm_list_2 (arg1, arg2), | |
3906 | SCM_ENV (proc))); | |
3907 | } | |
3908 | ||
3909 | scm_t_trampoline_2 | |
3910 | scm_trampoline_2 (SCM proc) | |
3911 | { | |
3912 | if (SCM_IMP (proc)) | |
3913 | return 0; | |
3914 | if (SCM_DEBUGGINGP) | |
3915 | return scm_call_2; | |
3916 | switch (SCM_TYP7 (proc)) | |
3917 | { | |
3918 | case scm_tc7_subr_2: | |
3919 | case scm_tc7_subr_2o: | |
3920 | case scm_tc7_rpsubr: | |
3921 | case scm_tc7_asubr: | |
3922 | return call_subr2_2; | |
3923 | case scm_tc7_lsubr: | |
3924 | return call_lsubr_2; | |
3925 | case scm_tcs_closures: | |
3926 | { | |
3927 | SCM formals = SCM_CLOSURE_FORMALS (proc); | |
3928 | if (!SCM_CONSP (formals) | |
3929 | || (SCM_CONSP (SCM_CDR (formals)) | |
3930 | && SCM_NULLP (SCM_CDDR (formals)))) | |
3931 | return call_closure_2; | |
3932 | else | |
3933 | return 0; | |
3934 | } | |
3935 | case scm_tcs_struct: | |
3936 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) | |
3937 | return scm_call_generic_2; | |
3938 | else if (!SCM_I_OPERATORP (proc)) | |
3939 | return 0; | |
3940 | return scm_call_2; | |
3941 | case scm_tc7_smob: | |
3942 | if (SCM_SMOB_APPLICABLE_P (proc)) | |
3943 | return SCM_SMOB_DESCRIPTOR (proc).apply_2; | |
3944 | else | |
3945 | return 0; | |
3946 | /* fall through */ | |
3947 | case scm_tc7_cclo: | |
3948 | case scm_tc7_pws: | |
3949 | return scm_call_2; | |
3950 | default: | |
3951 | return 0; /* not applicable on two args */ | |
3952 | } | |
3953 | } | |
3954 | ||
d9c393f5 JB |
3955 | /* Typechecking for multi-argument MAP and FOR-EACH. |
3956 | ||
47c3f06d | 3957 | Verify that each element of the vector ARGV, except for the first, |
d9c393f5 | 3958 | is a proper list whose length is LEN. Attribute errors to WHO, |
47c3f06d | 3959 | and claim that the i'th element of ARGV is WHO's i+2'th argument. */ |
d9c393f5 | 3960 | static inline void |
47c3f06d | 3961 | check_map_args (SCM argv, |
c014a02e | 3962 | long len, |
47c3f06d MD |
3963 | SCM gf, |
3964 | SCM proc, | |
3965 | SCM args, | |
3966 | const char *who) | |
d9c393f5 | 3967 | { |
34d19ef6 | 3968 | SCM const *ve = SCM_VELTS (argv); |
c014a02e | 3969 | long i; |
d9c393f5 | 3970 | |
b5c2579a | 3971 | for (i = SCM_VECTOR_LENGTH (argv) - 1; i >= 1; i--) |
d9c393f5 | 3972 | { |
c014a02e | 3973 | long elt_len = scm_ilength (ve[i]); |
d9c393f5 JB |
3974 | |
3975 | if (elt_len < 0) | |
47c3f06d MD |
3976 | { |
3977 | if (gf) | |
3978 | scm_apply_generic (gf, scm_cons (proc, args)); | |
3979 | else | |
3980 | scm_wrong_type_arg (who, i + 2, ve[i]); | |
3981 | } | |
d9c393f5 JB |
3982 | |
3983 | if (elt_len != len) | |
504d99c5 | 3984 | scm_out_of_range_pos (who, ve[i], SCM_MAKINUM (i + 2)); |
d9c393f5 JB |
3985 | } |
3986 | ||
5d2b97cd | 3987 | scm_remember_upto_here_1 (argv); |
d9c393f5 JB |
3988 | } |
3989 | ||
3990 | ||
47c3f06d | 3991 | SCM_GPROC (s_map, "map", 2, 0, 1, scm_map, g_map); |
1cc91f1b | 3992 | |
368bf056 MD |
3993 | /* Note: Currently, scm_map applies PROC to the argument list(s) |
3994 | sequentially, starting with the first element(s). This is used in | |
8878f040 | 3995 | evalext.c where the Scheme procedure `map-in-order', which guarantees |
368bf056 | 3996 | sequential behaviour, is implemented using scm_map. If the |
8878f040 | 3997 | behaviour changes, we need to update `map-in-order'. |
368bf056 MD |
3998 | */ |
3999 | ||
0f2d19dd | 4000 | SCM |
1bbd0b84 | 4001 | scm_map (SCM proc, SCM arg1, SCM args) |
af45e3b0 | 4002 | #define FUNC_NAME s_map |
0f2d19dd | 4003 | { |
c014a02e | 4004 | long i, len; |
0f2d19dd JB |
4005 | SCM res = SCM_EOL; |
4006 | SCM *pres = &res; | |
34d19ef6 | 4007 | SCM const *ve = &args; /* Keep args from being optimized away. */ |
0f2d19dd | 4008 | |
d9c393f5 | 4009 | len = scm_ilength (arg1); |
47c3f06d MD |
4010 | SCM_GASSERTn (len >= 0, |
4011 | g_map, scm_cons2 (proc, arg1, args), SCM_ARG2, s_map); | |
af45e3b0 | 4012 | SCM_VALIDATE_REST_ARGUMENT (args); |
0f2d19dd JB |
4013 | if (SCM_NULLP (args)) |
4014 | { | |
504d99c5 MD |
4015 | scm_t_trampoline_1 call = scm_trampoline_1 (proc); |
4016 | SCM_GASSERT2 (call, g_map, proc, arg1, SCM_ARG1, s_map); | |
4017 | while (SCM_NIMP (arg1)) | |
4018 | { | |
4019 | *pres = scm_list_1 (call (proc, SCM_CAR (arg1))); | |
4020 | pres = SCM_CDRLOC (*pres); | |
4021 | arg1 = SCM_CDR (arg1); | |
4022 | } | |
4023 | return res; | |
4024 | } | |
4025 | if (SCM_NULLP (SCM_CDR (args))) | |
4026 | { | |
4027 | SCM arg2 = SCM_CAR (args); | |
4028 | int len2 = scm_ilength (arg2); | |
4029 | scm_t_trampoline_2 call = scm_trampoline_2 (proc); | |
4030 | SCM_GASSERTn (call, | |
4031 | g_map, scm_cons2 (proc, arg1, args), SCM_ARG1, s_map); | |
4032 | SCM_GASSERTn (len2 >= 0, | |
4033 | g_map, scm_cons2 (proc, arg1, args), SCM_ARG3, s_map); | |
4034 | if (len2 != len) | |
4035 | SCM_OUT_OF_RANGE (3, arg2); | |
0f2d19dd JB |
4036 | while (SCM_NIMP (arg1)) |
4037 | { | |
504d99c5 | 4038 | *pres = scm_list_1 (call (proc, SCM_CAR (arg1), SCM_CAR (arg2))); |
a23afe53 | 4039 | pres = SCM_CDRLOC (*pres); |
0f2d19dd | 4040 | arg1 = SCM_CDR (arg1); |
504d99c5 | 4041 | arg2 = SCM_CDR (arg2); |
0f2d19dd JB |
4042 | } |
4043 | return res; | |
4044 | } | |
47c3f06d | 4045 | args = scm_vector (arg1 = scm_cons (arg1, args)); |
0f2d19dd | 4046 | ve = SCM_VELTS (args); |
47c3f06d | 4047 | check_map_args (args, len, g_map, proc, arg1, s_map); |
0f2d19dd JB |
4048 | while (1) |
4049 | { | |
4050 | arg1 = SCM_EOL; | |
b5c2579a | 4051 | for (i = SCM_VECTOR_LENGTH (args) - 1; i >= 0; i--) |
0f2d19dd | 4052 | { |
d9c393f5 JB |
4053 | if (SCM_IMP (ve[i])) |
4054 | return res; | |
0f2d19dd | 4055 | arg1 = scm_cons (SCM_CAR (ve[i]), arg1); |
34d19ef6 | 4056 | SCM_VECTOR_SET (args, i, SCM_CDR (ve[i])); |
0f2d19dd | 4057 | } |
8ea46249 | 4058 | *pres = scm_list_1 (scm_apply (proc, arg1, SCM_EOL)); |
a23afe53 | 4059 | pres = SCM_CDRLOC (*pres); |
0f2d19dd JB |
4060 | } |
4061 | } | |
af45e3b0 | 4062 | #undef FUNC_NAME |
0f2d19dd JB |
4063 | |
4064 | ||
47c3f06d | 4065 | SCM_GPROC (s_for_each, "for-each", 2, 0, 1, scm_for_each, g_for_each); |
1cc91f1b | 4066 | |
0f2d19dd | 4067 | SCM |
1bbd0b84 | 4068 | scm_for_each (SCM proc, SCM arg1, SCM args) |
af45e3b0 | 4069 | #define FUNC_NAME s_for_each |
0f2d19dd | 4070 | { |
34d19ef6 | 4071 | SCM const *ve = &args; /* Keep args from being optimized away. */ |
c014a02e | 4072 | long i, len; |
d9c393f5 | 4073 | len = scm_ilength (arg1); |
47c3f06d MD |
4074 | SCM_GASSERTn (len >= 0, g_for_each, scm_cons2 (proc, arg1, args), |
4075 | SCM_ARG2, s_for_each); | |
af45e3b0 | 4076 | SCM_VALIDATE_REST_ARGUMENT (args); |
c96d76b8 | 4077 | if (SCM_NULLP (args)) |
0f2d19dd | 4078 | { |
504d99c5 MD |
4079 | scm_t_trampoline_1 call = scm_trampoline_1 (proc); |
4080 | SCM_GASSERT2 (call, g_for_each, proc, arg1, SCM_ARG1, s_for_each); | |
4081 | while (SCM_NIMP (arg1)) | |
4082 | { | |
4083 | call (proc, SCM_CAR (arg1)); | |
4084 | arg1 = SCM_CDR (arg1); | |
4085 | } | |
4086 | return SCM_UNSPECIFIED; | |
4087 | } | |
4088 | if (SCM_NULLP (SCM_CDR (args))) | |
4089 | { | |
4090 | SCM arg2 = SCM_CAR (args); | |
4091 | int len2 = scm_ilength (arg2); | |
4092 | scm_t_trampoline_2 call = scm_trampoline_2 (proc); | |
4093 | SCM_GASSERTn (call, g_for_each, | |
4094 | scm_cons2 (proc, arg1, args), SCM_ARG1, s_for_each); | |
4095 | SCM_GASSERTn (len2 >= 0, g_for_each, | |
4096 | scm_cons2 (proc, arg1, args), SCM_ARG3, s_for_each); | |
4097 | if (len2 != len) | |
4098 | SCM_OUT_OF_RANGE (3, arg2); | |
c96d76b8 | 4099 | while (SCM_NIMP (arg1)) |
0f2d19dd | 4100 | { |
504d99c5 | 4101 | call (proc, SCM_CAR (arg1), SCM_CAR (arg2)); |
0f2d19dd | 4102 | arg1 = SCM_CDR (arg1); |
504d99c5 | 4103 | arg2 = SCM_CDR (arg2); |
0f2d19dd JB |
4104 | } |
4105 | return SCM_UNSPECIFIED; | |
4106 | } | |
47c3f06d | 4107 | args = scm_vector (arg1 = scm_cons (arg1, args)); |
0f2d19dd | 4108 | ve = SCM_VELTS (args); |
47c3f06d | 4109 | check_map_args (args, len, g_for_each, proc, arg1, s_for_each); |
0f2d19dd JB |
4110 | while (1) |
4111 | { | |
4112 | arg1 = SCM_EOL; | |
b5c2579a | 4113 | for (i = SCM_VECTOR_LENGTH (args) - 1; i >= 0; i--) |
0f2d19dd | 4114 | { |
c96d76b8 NJ |
4115 | if (SCM_IMP (ve[i])) |
4116 | return SCM_UNSPECIFIED; | |
0f2d19dd | 4117 | arg1 = scm_cons (SCM_CAR (ve[i]), arg1); |
34d19ef6 | 4118 | SCM_VECTOR_SET (args, i, SCM_CDR (ve[i])); |
0f2d19dd JB |
4119 | } |
4120 | scm_apply (proc, arg1, SCM_EOL); | |
4121 | } | |
4122 | } | |
af45e3b0 | 4123 | #undef FUNC_NAME |
0f2d19dd | 4124 | |
1cc91f1b | 4125 | |
0f2d19dd | 4126 | SCM |
6e8d25a6 | 4127 | scm_closure (SCM code, SCM env) |
0f2d19dd | 4128 | { |
16d4699b MV |
4129 | SCM z; |
4130 | SCM closcar = scm_cons (code, SCM_EOL); | |
228a24ef | 4131 | z = scm_cell (SCM_UNPACK (closcar) + scm_tc3_closure, (scm_t_bits) env); |
16d4699b | 4132 | scm_remember_upto_here (closcar); |
0f2d19dd JB |
4133 | return z; |
4134 | } | |
4135 | ||
4136 | ||
92c2555f | 4137 | scm_t_bits scm_tc16_promise; |
1cc91f1b | 4138 | |
0f2d19dd | 4139 | SCM |
6e8d25a6 | 4140 | scm_makprom (SCM code) |
0f2d19dd | 4141 | { |
cf498326 | 4142 | SCM_RETURN_NEWSMOB (scm_tc16_promise, SCM_UNPACK (code)); |
0f2d19dd JB |
4143 | } |
4144 | ||
4145 | ||
1cc91f1b | 4146 | |
0f2d19dd | 4147 | static int |
e841c3e0 | 4148 | promise_print (SCM exp, SCM port, scm_print_state *pstate) |
0f2d19dd | 4149 | { |
19402679 | 4150 | int writingp = SCM_WRITINGP (pstate); |
b7f3516f | 4151 | scm_puts ("#<promise ", port); |
19402679 | 4152 | SCM_SET_WRITINGP (pstate, 1); |
729dbac3 | 4153 | scm_iprin1 (SCM_CELL_OBJECT_1 (exp), port, pstate); |
19402679 | 4154 | SCM_SET_WRITINGP (pstate, writingp); |
b7f3516f | 4155 | scm_putc ('>', port); |
0f2d19dd JB |
4156 | return !0; |
4157 | } | |
4158 | ||
4159 | ||
3b3b36dd | 4160 | SCM_DEFINE (scm_force, "force", 1, 0, 0, |
67e8151b MG |
4161 | (SCM x), |
4162 | "If the promise @var{x} has not been computed yet, compute and\n" | |
4163 | "return @var{x}, otherwise just return the previously computed\n" | |
4164 | "value.") | |
1bbd0b84 | 4165 | #define FUNC_NAME s_scm_force |
0f2d19dd | 4166 | { |
445f675c DH |
4167 | SCM_VALIDATE_SMOB (1, x, promise); |
4168 | if (!((1L << 16) & SCM_CELL_WORD_0 (x))) | |
0f2d19dd | 4169 | { |
fdc28395 | 4170 | SCM ans = scm_call_0 (SCM_CELL_OBJECT_1 (x)); |
445f675c | 4171 | if (!((1L << 16) & SCM_CELL_WORD_0 (x))) |
0f2d19dd JB |
4172 | { |
4173 | SCM_DEFER_INTS; | |
445f675c DH |
4174 | SCM_SET_CELL_OBJECT_1 (x, ans); |
4175 | SCM_SET_CELL_WORD_0 (x, SCM_CELL_WORD_0 (x) | (1L << 16)); | |
0f2d19dd JB |
4176 | SCM_ALLOW_INTS; |
4177 | } | |
4178 | } | |
445f675c | 4179 | return SCM_CELL_OBJECT_1 (x); |
0f2d19dd | 4180 | } |
1bbd0b84 | 4181 | #undef FUNC_NAME |
0f2d19dd | 4182 | |
445f675c | 4183 | |
a1ec6916 | 4184 | SCM_DEFINE (scm_promise_p, "promise?", 1, 0, 0, |
67e8151b | 4185 | (SCM obj), |
b380b885 | 4186 | "Return true if @var{obj} is a promise, i.e. a delayed computation\n" |
7a095584 | 4187 | "(@pxref{Delayed evaluation,,,r5rs.info,The Revised^5 Report on Scheme}).") |
1bbd0b84 | 4188 | #define FUNC_NAME s_scm_promise_p |
0f2d19dd | 4189 | { |
67e8151b | 4190 | return SCM_BOOL (SCM_TYP16_PREDICATE (scm_tc16_promise, obj)); |
0f2d19dd | 4191 | } |
1bbd0b84 | 4192 | #undef FUNC_NAME |
0f2d19dd | 4193 | |
445f675c | 4194 | |
a1ec6916 | 4195 | SCM_DEFINE (scm_cons_source, "cons-source", 3, 0, 0, |
1bbd0b84 | 4196 | (SCM xorig, SCM x, SCM y), |
11768c04 NJ |
4197 | "Create and return a new pair whose car and cdr are @var{x} and @var{y}.\n" |
4198 | "Any source properties associated with @var{xorig} are also associated\n" | |
4199 | "with the new pair.") | |
1bbd0b84 | 4200 | #define FUNC_NAME s_scm_cons_source |
26d5b9b4 MD |
4201 | { |
4202 | SCM p, z; | |
16d4699b | 4203 | z = scm_cons (x, y); |
26d5b9b4 MD |
4204 | /* Copy source properties possibly associated with xorig. */ |
4205 | p = scm_whash_lookup (scm_source_whash, xorig); | |
445f675c | 4206 | if (!SCM_IMP (p)) |
26d5b9b4 MD |
4207 | scm_whash_insert (scm_source_whash, z, p); |
4208 | return z; | |
4209 | } | |
1bbd0b84 | 4210 | #undef FUNC_NAME |
26d5b9b4 | 4211 | |
445f675c | 4212 | |
a1ec6916 | 4213 | SCM_DEFINE (scm_copy_tree, "copy-tree", 1, 0, 0, |
1bbd0b84 | 4214 | (SCM obj), |
b380b885 MD |
4215 | "Recursively copy the data tree that is bound to @var{obj}, and return a\n" |
4216 | "pointer to the new data structure. @code{copy-tree} recurses down the\n" | |
4217 | "contents of both pairs and vectors (since both cons cells and vector\n" | |
4218 | "cells may point to arbitrary objects), and stops recursing when it hits\n" | |
4219 | "any other object.") | |
1bbd0b84 | 4220 | #define FUNC_NAME s_scm_copy_tree |
0f2d19dd JB |
4221 | { |
4222 | SCM ans, tl; | |
26d5b9b4 | 4223 | if (SCM_IMP (obj)) |
ff467021 | 4224 | return obj; |
3910272e MD |
4225 | if (SCM_VECTORP (obj)) |
4226 | { | |
c014a02e | 4227 | unsigned long i = SCM_VECTOR_LENGTH (obj); |
00ffa0e7 | 4228 | ans = scm_c_make_vector (i, SCM_UNSPECIFIED); |
3910272e | 4229 | while (i--) |
34d19ef6 | 4230 | SCM_VECTOR_SET (ans, i, scm_copy_tree (SCM_VELTS (obj)[i])); |
3910272e MD |
4231 | return ans; |
4232 | } | |
01f11e02 | 4233 | if (!SCM_CONSP (obj)) |
0f2d19dd | 4234 | return obj; |
26d5b9b4 MD |
4235 | ans = tl = scm_cons_source (obj, |
4236 | scm_copy_tree (SCM_CAR (obj)), | |
4237 | SCM_UNSPECIFIED); | |
cabe682c | 4238 | while (obj = SCM_CDR (obj), SCM_CONSP (obj)) |
a23afe53 MD |
4239 | { |
4240 | SCM_SETCDR (tl, scm_cons (scm_copy_tree (SCM_CAR (obj)), | |
4241 | SCM_UNSPECIFIED)); | |
4242 | tl = SCM_CDR (tl); | |
4243 | } | |
4244 | SCM_SETCDR (tl, obj); | |
0f2d19dd JB |
4245 | return ans; |
4246 | } | |
1bbd0b84 | 4247 | #undef FUNC_NAME |
0f2d19dd | 4248 | |
1cc91f1b | 4249 | |
4163eb72 MV |
4250 | /* We have three levels of EVAL here: |
4251 | ||
4252 | - scm_i_eval (exp, env) | |
4253 | ||
4254 | evaluates EXP in environment ENV. ENV is a lexical environment | |
4255 | structure as used by the actual tree code evaluator. When ENV is | |
4256 | a top-level environment, then changes to the current module are | |
a513ead3 | 4257 | tracked by updating ENV so that it continues to be in sync with |
4163eb72 MV |
4258 | the current module. |
4259 | ||
4260 | - scm_primitive_eval (exp) | |
4261 | ||
4262 | evaluates EXP in the top-level environment as determined by the | |
4263 | current module. This is done by constructing a suitable | |
4264 | environment and calling scm_i_eval. Thus, changes to the | |
4265 | top-level module are tracked normally. | |
4266 | ||
4267 | - scm_eval (exp, mod) | |
4268 | ||
a513ead3 | 4269 | evaluates EXP while MOD is the current module. This is done by |
4163eb72 MV |
4270 | setting the current module to MOD, invoking scm_primitive_eval on |
4271 | EXP, and then restoring the current module to the value it had | |
4272 | previously. That is, while EXP is evaluated, changes to the | |
4273 | current module are tracked, but these changes do not persist when | |
4274 | scm_eval returns. | |
4275 | ||
4276 | For each level of evals, there are two variants, distinguished by a | |
4277 | _x suffix: the ordinary variant does not modify EXP while the _x | |
4278 | variant can destructively modify EXP into something completely | |
4279 | unintelligible. A Scheme data structure passed as EXP to one of the | |
4280 | _x variants should not ever be used again for anything. So when in | |
4281 | doubt, use the ordinary variant. | |
4282 | ||
4283 | */ | |
4284 | ||
0f2d19dd | 4285 | SCM |
68d8be66 | 4286 | scm_i_eval_x (SCM exp, SCM env) |
0f2d19dd | 4287 | { |
68d8be66 | 4288 | return SCM_XEVAL (exp, env); |
0f2d19dd JB |
4289 | } |
4290 | ||
68d8be66 MD |
4291 | SCM |
4292 | scm_i_eval (SCM exp, SCM env) | |
4293 | { | |
26fb6390 | 4294 | exp = scm_copy_tree (exp); |
e37a4fba | 4295 | return SCM_XEVAL (exp, env); |
68d8be66 MD |
4296 | } |
4297 | ||
4298 | SCM | |
4163eb72 | 4299 | scm_primitive_eval_x (SCM exp) |
0f2d19dd | 4300 | { |
a513ead3 | 4301 | SCM env; |
bcdab802 | 4302 | SCM transformer = scm_current_module_transformer (); |
a513ead3 | 4303 | if (SCM_NIMP (transformer)) |
fdc28395 | 4304 | exp = scm_call_1 (transformer, exp); |
a513ead3 | 4305 | env = scm_top_level_env (scm_current_module_lookup_closure ()); |
4163eb72 | 4306 | return scm_i_eval_x (exp, env); |
0f2d19dd JB |
4307 | } |
4308 | ||
4163eb72 MV |
4309 | SCM_DEFINE (scm_primitive_eval, "primitive-eval", 1, 0, 0, |
4310 | (SCM exp), | |
2069af38 | 4311 | "Evaluate @var{exp} in the top-level environment specified by\n" |
4163eb72 MV |
4312 | "the current module.") |
4313 | #define FUNC_NAME s_scm_primitive_eval | |
4314 | { | |
a513ead3 | 4315 | SCM env; |
bcdab802 | 4316 | SCM transformer = scm_current_module_transformer (); |
a513ead3 | 4317 | if (SCM_NIMP (transformer)) |
fdc28395 | 4318 | exp = scm_call_1 (transformer, exp); |
a513ead3 | 4319 | env = scm_top_level_env (scm_current_module_lookup_closure ()); |
4163eb72 MV |
4320 | return scm_i_eval (exp, env); |
4321 | } | |
4322 | #undef FUNC_NAME | |
4323 | ||
68d8be66 MD |
4324 | /* Eval does not take the second arg optionally. This is intentional |
4325 | * in order to be R5RS compatible, and to prepare for the new module | |
4326 | * system, where we would like to make the choice of evaluation | |
4163eb72 | 4327 | * environment explicit. */ |
549e6ec6 | 4328 | |
09074dbf DH |
4329 | static void |
4330 | change_environment (void *data) | |
4331 | { | |
4332 | SCM pair = SCM_PACK (data); | |
4333 | SCM new_module = SCM_CAR (pair); | |
aa767bc5 | 4334 | SCM old_module = scm_current_module (); |
09074dbf | 4335 | SCM_SETCDR (pair, old_module); |
aa767bc5 | 4336 | scm_set_current_module (new_module); |
09074dbf DH |
4337 | } |
4338 | ||
4339 | ||
09074dbf DH |
4340 | static void |
4341 | restore_environment (void *data) | |
4342 | { | |
4343 | SCM pair = SCM_PACK (data); | |
4344 | SCM old_module = SCM_CDR (pair); | |
aa767bc5 | 4345 | SCM new_module = scm_current_module (); |
2e9c835d | 4346 | SCM_SETCAR (pair, new_module); |
aa767bc5 | 4347 | scm_set_current_module (old_module); |
09074dbf DH |
4348 | } |
4349 | ||
4163eb72 MV |
4350 | static SCM |
4351 | inner_eval_x (void *data) | |
4352 | { | |
4353 | return scm_primitive_eval_x (SCM_PACK(data)); | |
4354 | } | |
4355 | ||
4356 | SCM | |
4357 | scm_eval_x (SCM exp, SCM module) | |
4358 | #define FUNC_NAME "eval!" | |
4359 | { | |
4360 | SCM_VALIDATE_MODULE (2, module); | |
4361 | ||
4362 | return scm_internal_dynamic_wind | |
4363 | (change_environment, inner_eval_x, restore_environment, | |
4364 | (void *) SCM_UNPACK (exp), | |
4365 | (void *) SCM_UNPACK (scm_cons (module, SCM_BOOL_F))); | |
4366 | } | |
4367 | #undef FUNC_NAME | |
4368 | ||
4369 | static SCM | |
4370 | inner_eval (void *data) | |
4371 | { | |
4372 | return scm_primitive_eval (SCM_PACK(data)); | |
4373 | } | |
09074dbf | 4374 | |
68d8be66 | 4375 | SCM_DEFINE (scm_eval, "eval", 2, 0, 0, |
4163eb72 MV |
4376 | (SCM exp, SCM module), |
4377 | "Evaluate @var{exp}, a list representing a Scheme expression,\n" | |
4378 | "in the top-level environment specified by @var{module}.\n" | |
8f85c0c6 | 4379 | "While @var{exp} is evaluated (using @code{primitive-eval}),\n" |
4163eb72 MV |
4380 | "@var{module} is made the current module. The current module\n" |
4381 | "is reset to its previous value when @var{eval} returns.") | |
1bbd0b84 | 4382 | #define FUNC_NAME s_scm_eval |
0f2d19dd | 4383 | { |
4163eb72 | 4384 | SCM_VALIDATE_MODULE (2, module); |
09074dbf DH |
4385 | |
4386 | return scm_internal_dynamic_wind | |
4387 | (change_environment, inner_eval, restore_environment, | |
4163eb72 MV |
4388 | (void *) SCM_UNPACK (exp), |
4389 | (void *) SCM_UNPACK (scm_cons (module, SCM_BOOL_F))); | |
0f2d19dd | 4390 | } |
1bbd0b84 | 4391 | #undef FUNC_NAME |
0f2d19dd | 4392 | |
6dbd0af5 MD |
4393 | |
4394 | /* At this point, scm_deval and scm_dapply are generated. | |
4395 | */ | |
4396 | ||
0f2d19dd | 4397 | #ifdef DEBUG_EXTENSIONS |
6dbd0af5 MD |
4398 | # define DEVAL |
4399 | # include "eval.c" | |
0f2d19dd JB |
4400 | #endif |
4401 | ||
4402 | ||
1cc91f1b | 4403 | |
0f2d19dd JB |
4404 | void |
4405 | scm_init_eval () | |
0f2d19dd | 4406 | { |
33b97402 MD |
4407 | scm_init_opts (scm_evaluator_traps, |
4408 | scm_evaluator_trap_table, | |
4409 | SCM_N_EVALUATOR_TRAPS); | |
4410 | scm_init_opts (scm_eval_options_interface, | |
4411 | scm_eval_opts, | |
4412 | SCM_N_EVAL_OPTIONS); | |
4413 | ||
f99c9c28 MD |
4414 | scm_tc16_promise = scm_make_smob_type ("promise", 0); |
4415 | scm_set_smob_mark (scm_tc16_promise, scm_markcdr); | |
e841c3e0 | 4416 | scm_set_smob_print (scm_tc16_promise, promise_print); |
b8229a3b | 4417 | |
7c33806a | 4418 | /* Dirk:Fixme:: make scm_undefineds local to eval.c: it's only used here. */ |
8ea46249 | 4419 | scm_undefineds = scm_list_1 (SCM_UNDEFINED); |
7c33806a | 4420 | SCM_SETCDR (scm_undefineds, scm_undefineds); |
8ea46249 | 4421 | scm_listofnull = scm_list_1 (SCM_EOL); |
7c33806a | 4422 | |
9a441ddb | 4423 | scm_f_apply = scm_c_define_subr ("apply", scm_tc7_lsubr_2, scm_apply); |
0f2d19dd | 4424 | |
86d31dfe MV |
4425 | /* acros */ |
4426 | /* end of acros */ | |
4427 | ||
a0599745 | 4428 | #include "libguile/eval.x" |
86d31dfe | 4429 | |
25eaf21a | 4430 | scm_add_feature ("delay"); |
0f2d19dd | 4431 | } |
0f2d19dd | 4432 | |
6dbd0af5 | 4433 | #endif /* !DEVAL */ |
89e00824 ML |
4434 | |
4435 | /* | |
4436 | Local Variables: | |
4437 | c-file-style: "gnu" | |
4438 | End: | |
4439 | */ |