Commit | Line | Data |
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997659f8 | 1 | /* Copyright (C) 1995,1996,1997,1998,1999,2000,2001,2002,2003,2004,2005,2006,2007,2008,2009,2010 |
434f2f7a | 2 | * Free Software Foundation, Inc. |
0f2d19dd | 3 | * |
73be1d9e | 4 | * This library is free software; you can redistribute it and/or |
53befeb7 NJ |
5 | * modify it under the terms of the GNU Lesser General Public License |
6 | * as published by the Free Software Foundation; either version 3 of | |
7 | * the License, or (at your option) any later version. | |
0f2d19dd | 8 | * |
53befeb7 NJ |
9 | * This library is distributed in the hope that it will be useful, but |
10 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
73be1d9e MV |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
12 | * Lesser General Public License for more details. | |
0f2d19dd | 13 | * |
73be1d9e MV |
14 | * You should have received a copy of the GNU Lesser General Public |
15 | * License along with this library; if not, write to the Free Software | |
53befeb7 NJ |
16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
17 | * 02110-1301 USA | |
73be1d9e | 18 | */ |
1bbd0b84 | 19 | |
0f2d19dd JB |
20 | \f |
21 | ||
dbb605f5 | 22 | #ifdef HAVE_CONFIG_H |
3d05f2e0 RB |
23 | # include <config.h> |
24 | #endif | |
0f2d19dd | 25 | |
f7439099 | 26 | #include <alloca.h> |
3d05f2e0 | 27 | |
f7439099 | 28 | #include "libguile/__scm.h" |
48b96f4b | 29 | |
a0599745 | 30 | #include "libguile/_scm.h" |
21628685 DH |
31 | #include "libguile/alist.h" |
32 | #include "libguile/async.h" | |
33 | #include "libguile/continuations.h" | |
747022e4 | 34 | #include "libguile/control.h" |
a0599745 | 35 | #include "libguile/debug.h" |
328dc9a3 | 36 | #include "libguile/deprecation.h" |
09074dbf | 37 | #include "libguile/dynwind.h" |
a0599745 | 38 | #include "libguile/eq.h" |
a310a1d1 | 39 | #include "libguile/expand.h" |
21628685 DH |
40 | #include "libguile/feature.h" |
41 | #include "libguile/fluids.h" | |
21628685 DH |
42 | #include "libguile/goops.h" |
43 | #include "libguile/hash.h" | |
44 | #include "libguile/hashtab.h" | |
4610b011 | 45 | #include "libguile/list.h" |
a0599745 | 46 | #include "libguile/macros.h" |
b7742c6b | 47 | #include "libguile/memoize.h" |
a0599745 MD |
48 | #include "libguile/modules.h" |
49 | #include "libguile/ports.h" | |
7e6e6b37 | 50 | #include "libguile/print.h" |
21628685 | 51 | #include "libguile/procprop.h" |
4abef68f | 52 | #include "libguile/programs.h" |
a0599745 | 53 | #include "libguile/root.h" |
21628685 DH |
54 | #include "libguile/smob.h" |
55 | #include "libguile/srcprop.h" | |
56 | #include "libguile/stackchk.h" | |
57 | #include "libguile/strings.h" | |
9de87eea | 58 | #include "libguile/threads.h" |
21628685 DH |
59 | #include "libguile/throw.h" |
60 | #include "libguile/validate.h" | |
a513ead3 | 61 | #include "libguile/values.h" |
21628685 | 62 | #include "libguile/vectors.h" |
4abef68f | 63 | #include "libguile/vm.h" |
a0599745 | 64 | |
a0599745 | 65 | #include "libguile/eval.h" |
0ee05b85 | 66 | #include "libguile/private-options.h" |
89efbff4 | 67 | |
0f2d19dd JB |
68 | \f |
69 | ||
0ee05b85 | 70 | |
b7742c6b | 71 | /* We have three levels of EVAL here: |
609a8b86 | 72 | |
b7742c6b | 73 | - eval (exp, env) |
89bff2fc | 74 | |
b7742c6b AW |
75 | evaluates EXP in environment ENV. ENV is a lexical environment |
76 | structure as used by the actual tree code evaluator. When ENV is | |
77 | a top-level environment, then changes to the current module are | |
78 | tracked by updating ENV so that it continues to be in sync with | |
79 | the current module. | |
e6729603 | 80 | |
b7742c6b | 81 | - scm_primitive_eval (exp) |
e6729603 | 82 | |
b7742c6b AW |
83 | evaluates EXP in the top-level environment as determined by the |
84 | current module. This is done by constructing a suitable | |
85 | environment and calling eval. Thus, changes to the | |
86 | top-level module are tracked normally. | |
e6729603 | 87 | |
b7742c6b | 88 | - scm_eval (exp, mod) |
e6729603 | 89 | |
b7742c6b AW |
90 | evaluates EXP while MOD is the current module. This is done |
91 | by setting the current module to MOD_OR_STATE, invoking | |
92 | scm_primitive_eval on EXP, and then restoring the current module | |
93 | to the value it had previously. That is, while EXP is evaluated, | |
94 | changes to the current module (or dynamic state) are tracked, | |
95 | but these changes do not persist when scm_eval returns. | |
e6729603 | 96 | |
b7742c6b | 97 | */ |
e6729603 | 98 | |
e6729603 | 99 | |
314b8716 AW |
100 | /* Boot closures. We only see these when compiling eval.scm, because once |
101 | eval.scm is in the house, closures are standard VM closures. | |
102 | */ | |
103 | ||
104 | static scm_t_bits scm_tc16_boot_closure; | |
105 | #define RETURN_BOOT_CLOSURE(code, env) SCM_RETURN_NEWSMOB2 (scm_tc16_boot_closure, (code), (env)) | |
106 | #define BOOT_CLOSURE_P(obj) SCM_TYP16_PREDICATE (scm_tc16_boot_closure, (obj)) | |
107 | #define BOOT_CLOSURE_CODE(x) SCM_SMOB_OBJECT (x) | |
108 | #define BOOT_CLOSURE_ENV(x) SCM_SMOB_OBJECT_2 (x) | |
8f9c5b58 AW |
109 | #define BOOT_CLOSURE_BODY(x) CAR (BOOT_CLOSURE_CODE (x)) |
110 | #define BOOT_CLOSURE_NUM_REQUIRED_ARGS(x) SCM_I_INUM (CADR (BOOT_CLOSURE_CODE (x))) | |
111 | #define BOOT_CLOSURE_IS_FIXED(x) scm_is_null (CDDR (BOOT_CLOSURE_CODE (x))) | |
112 | /* NB: One may only call the following accessors if the closure is not FIXED. */ | |
113 | #define BOOT_CLOSURE_HAS_REST_ARGS(x) scm_is_true (CADDR (BOOT_CLOSURE_CODE (x))) | |
114 | #define BOOT_CLOSURE_IS_REST(x) scm_is_null (CDDDR (BOOT_CLOSURE_CODE (x))) | |
115 | /* NB: One may only call the following accessors if the closure is not REST. */ | |
116 | #define BOOT_CLOSURE_IS_FULL(x) (1) | |
dc3e203e AW |
117 | #define BOOT_CLOSURE_PARSE_FULL(fu_,body,nargs,rest,nopt,kw,inits,alt) \ |
118 | do { SCM fu = fu_; \ | |
119 | body = CAR (fu); fu = CDR (fu); \ | |
120 | \ | |
121 | rest = kw = alt = SCM_BOOL_F; \ | |
122 | inits = SCM_EOL; \ | |
123 | nopt = 0; \ | |
124 | \ | |
125 | nreq = SCM_I_INUM (CAR (fu)); fu = CDR (fu); \ | |
126 | if (scm_is_pair (fu)) \ | |
127 | { \ | |
128 | rest = CAR (fu); fu = CDR (fu); \ | |
129 | if (scm_is_pair (fu)) \ | |
130 | { \ | |
131 | nopt = SCM_I_INUM (CAR (fu)); fu = CDR (fu); \ | |
132 | kw = CAR (fu); fu = CDR (fu); \ | |
133 | inits = CAR (fu); fu = CDR (fu); \ | |
134 | alt = CAR (fu); \ | |
135 | } \ | |
136 | } \ | |
d8a071fc | 137 | } while (0) |
7572ee52 AW |
138 | static void prepare_boot_closure_env_for_apply (SCM proc, SCM args, |
139 | SCM *out_body, SCM *out_env); | |
140 | static void prepare_boot_closure_env_for_eval (SCM proc, unsigned int argc, | |
141 | SCM exps, SCM *out_body, | |
142 | SCM *inout_env); | |
314b8716 AW |
143 | |
144 | ||
b7742c6b AW |
145 | #define CAR(x) SCM_CAR(x) |
146 | #define CDR(x) SCM_CDR(x) | |
147 | #define CAAR(x) SCM_CAAR(x) | |
148 | #define CADR(x) SCM_CADR(x) | |
149 | #define CDAR(x) SCM_CDAR(x) | |
150 | #define CDDR(x) SCM_CDDR(x) | |
151 | #define CADDR(x) SCM_CADDR(x) | |
152 | #define CDDDR(x) SCM_CDDDR(x) | |
e6729603 DH |
153 | |
154 | ||
b7742c6b | 155 | SCM_SYMBOL (scm_unbound_variable_key, "unbound-variable"); |
e6729603 | 156 | |
b7742c6b | 157 | static void error_used_before_defined (void) |
d0624e39 | 158 | { |
b7742c6b AW |
159 | scm_error (scm_unbound_variable_key, NULL, |
160 | "Variable used before given a value", SCM_EOL, SCM_BOOL_F); | |
d0624e39 | 161 | } |
d0624e39 | 162 | |
d8a071fc AW |
163 | static void error_invalid_keyword (SCM proc) |
164 | { | |
165 | scm_error_scm (scm_from_locale_symbol ("keyword-argument-error"), proc, | |
166 | scm_from_locale_string ("Invalid keyword"), SCM_EOL, | |
167 | SCM_BOOL_F); | |
168 | } | |
169 | ||
170 | static void error_unrecognized_keyword (SCM proc) | |
171 | { | |
172 | scm_error_scm (scm_from_locale_symbol ("keyword-argument-error"), proc, | |
173 | scm_from_locale_string ("Unrecognized keyword"), SCM_EOL, | |
174 | SCM_BOOL_F); | |
175 | } | |
176 | ||
177 | ||
b7742c6b | 178 | /* the environment: |
3149a5b6 | 179 | (VAL ... . MOD) |
b7742c6b AW |
180 | If MOD is #f, it means the environment was captured before modules were |
181 | booted. | |
182 | If MOD is the literal value '(), we are evaluating at the top level, and so | |
183 | should track changes to the current module. You have to be careful in this | |
184 | case, because further lexical contours should capture the current module. | |
185 | */ | |
186 | #define CAPTURE_ENV(env) \ | |
187 | ((env == SCM_EOL) ? scm_current_module () : \ | |
188 | ((env == SCM_BOOL_F) ? scm_the_root_module () : env)) | |
6f81708a DH |
189 | |
190 | static SCM | |
b7742c6b | 191 | eval (SCM x, SCM env) |
6f81708a | 192 | { |
b7742c6b AW |
193 | SCM mx; |
194 | SCM proc = SCM_UNDEFINED, args = SCM_EOL; | |
b7ecadca | 195 | unsigned int argc; |
6f81708a | 196 | |
b7742c6b AW |
197 | loop: |
198 | SCM_TICK; | |
199 | if (!SCM_MEMOIZED_P (x)) | |
200 | abort (); | |
201 | ||
202 | mx = SCM_MEMOIZED_ARGS (x); | |
203 | switch (SCM_MEMOIZED_TAG (x)) | |
204 | { | |
205 | case SCM_M_BEGIN: | |
206 | for (; !scm_is_null (CDR (mx)); mx = CDR (mx)) | |
207 | eval (CAR (mx), env); | |
208 | x = CAR (mx); | |
209 | goto loop; | |
210 | ||
211 | case SCM_M_IF: | |
212 | if (scm_is_true (eval (CAR (mx), env))) | |
213 | x = CADR (mx); | |
6f81708a | 214 | else |
b7742c6b AW |
215 | x = CDDR (mx); |
216 | goto loop; | |
5fb64383 | 217 | |
b7742c6b AW |
218 | case SCM_M_LET: |
219 | { | |
220 | SCM inits = CAR (mx); | |
221 | SCM new_env = CAPTURE_ENV (env); | |
222 | for (; scm_is_pair (inits); inits = CDR (inits)) | |
223 | new_env = scm_cons (eval (CAR (inits), env), new_env); | |
224 | env = new_env; | |
225 | x = CDR (mx); | |
226 | goto loop; | |
227 | } | |
228 | ||
229 | case SCM_M_LAMBDA: | |
314b8716 | 230 | RETURN_BOOT_CLOSURE (mx, CAPTURE_ENV (env)); |
5fb64383 | 231 | |
b7742c6b AW |
232 | case SCM_M_QUOTE: |
233 | return mx; | |
0f2d19dd | 234 | |
b7742c6b AW |
235 | case SCM_M_DEFINE: |
236 | scm_define (CAR (mx), eval (CDR (mx), env)); | |
237 | return SCM_UNSPECIFIED; | |
212e58ed | 238 | |
d69531e2 AW |
239 | case SCM_M_DYNWIND: |
240 | { | |
241 | SCM in, out, res, old_winds; | |
242 | in = eval (CAR (mx), env); | |
243 | out = eval (CDDR (mx), env); | |
244 | scm_call_0 (in); | |
245 | old_winds = scm_i_dynwinds (); | |
246 | scm_i_set_dynwinds (scm_acons (in, out, old_winds)); | |
247 | res = eval (CADR (mx), env); | |
248 | scm_i_set_dynwinds (old_winds); | |
249 | scm_call_0 (out); | |
250 | return res; | |
251 | } | |
252 | ||
bb0229b5 AW |
253 | case SCM_M_WITH_FLUIDS: |
254 | { | |
255 | long i, len; | |
256 | SCM *fluidv, *valuesv, walk, wf, res; | |
257 | len = scm_ilength (CAR (mx)); | |
258 | fluidv = alloca (sizeof (SCM)*len); | |
259 | for (i = 0, walk = CAR (mx); i < len; i++, walk = CDR (walk)) | |
260 | fluidv[i] = eval (CAR (walk), env); | |
261 | valuesv = alloca (sizeof (SCM)*len); | |
262 | for (i = 0, walk = CADR (mx); i < len; i++, walk = CDR (walk)) | |
263 | valuesv[i] = eval (CAR (walk), env); | |
264 | ||
265 | wf = scm_i_make_with_fluids (len, fluidv, valuesv); | |
266 | scm_i_swap_with_fluids (wf, SCM_I_CURRENT_THREAD->dynamic_state); | |
267 | scm_i_set_dynwinds (scm_cons (wf, scm_i_dynwinds ())); | |
268 | res = eval (CDDR (mx), env); | |
269 | scm_i_swap_with_fluids (wf, SCM_I_CURRENT_THREAD->dynamic_state); | |
270 | scm_i_set_dynwinds (CDR (scm_i_dynwinds ())); | |
271 | ||
272 | return res; | |
273 | } | |
274 | ||
b7742c6b AW |
275 | case SCM_M_APPLY: |
276 | /* Evaluate the procedure to be applied. */ | |
277 | proc = eval (CAR (mx), env); | |
278 | /* Evaluate the argument holding the list of arguments */ | |
279 | args = eval (CADR (mx), env); | |
280 | ||
281 | apply_proc: | |
282 | /* Go here to tail-apply a procedure. PROC is the procedure and | |
283 | * ARGS is the list of arguments. */ | |
314b8716 | 284 | if (BOOT_CLOSURE_P (proc)) |
b7742c6b | 285 | { |
7572ee52 | 286 | prepare_boot_closure_env_for_apply (proc, args, &x, &env); |
b7742c6b AW |
287 | goto loop; |
288 | } | |
289 | else | |
ea9f4f4b | 290 | return scm_call_with_vm (scm_the_vm (), proc, args); |
212e58ed | 291 | |
b7742c6b AW |
292 | case SCM_M_CALL: |
293 | /* Evaluate the procedure to be applied. */ | |
294 | proc = eval (CAR (mx), env); | |
b7ecadca | 295 | argc = SCM_I_INUM (CADR (mx)); |
9331f91c | 296 | mx = CDDR (mx); |
212e58ed | 297 | |
314b8716 | 298 | if (BOOT_CLOSURE_P (proc)) |
5fa0939c | 299 | { |
7572ee52 | 300 | prepare_boot_closure_env_for_eval (proc, argc, mx, &x, &env); |
b7742c6b | 301 | goto loop; |
5fa0939c | 302 | } |
b7742c6b AW |
303 | else |
304 | { | |
e2cf8eb9 | 305 | SCM *argv; |
b7ecadca LC |
306 | unsigned int i; |
307 | ||
e2cf8eb9 | 308 | argv = alloca (argc * sizeof (SCM)); |
b7ecadca LC |
309 | for (i = 0; i < argc; i++, mx = CDR (mx)) |
310 | argv[i] = eval (CAR (mx), env); | |
311 | ||
312 | return scm_c_vm_run (scm_the_vm (), proc, argv, argc); | |
b7742c6b | 313 | } |
b7ecadca | 314 | |
b7742c6b | 315 | case SCM_M_CONT: |
babfc7b2 | 316 | return scm_i_call_with_current_continuation (eval (mx, env)); |
212e58ed | 317 | |
b7742c6b AW |
318 | case SCM_M_CALL_WITH_VALUES: |
319 | { | |
320 | SCM producer; | |
321 | SCM v; | |
322 | ||
323 | producer = eval (CAR (mx), env); | |
324 | proc = eval (CDR (mx), env); /* proc is the consumer. */ | |
ea9f4f4b | 325 | v = scm_call_with_vm (scm_the_vm (), producer, SCM_EOL); |
b7742c6b AW |
326 | if (SCM_VALUESP (v)) |
327 | args = scm_struct_ref (v, SCM_INUM0); | |
328 | else | |
329 | args = scm_list_1 (v); | |
330 | goto apply_proc; | |
331 | } | |
26d5b9b4 | 332 | |
b7742c6b AW |
333 | case SCM_M_LEXICAL_REF: |
334 | { | |
335 | int n; | |
336 | SCM ret; | |
337 | for (n = SCM_I_INUM (mx); n; n--) | |
338 | env = CDR (env); | |
339 | ret = CAR (env); | |
340 | if (SCM_UNLIKELY (SCM_UNBNDP (ret))) | |
341 | /* we don't know what variable, though, because we don't have its | |
342 | name */ | |
343 | error_used_before_defined (); | |
344 | return ret; | |
345 | } | |
1cc91f1b | 346 | |
b7742c6b AW |
347 | case SCM_M_LEXICAL_SET: |
348 | { | |
349 | int n; | |
350 | SCM val = eval (CDR (mx), env); | |
351 | for (n = SCM_I_INUM (CAR (mx)); n; n--) | |
352 | env = CDR (env); | |
353 | SCM_SETCAR (env, val); | |
354 | return SCM_UNSPECIFIED; | |
355 | } | |
910b5125 | 356 | |
b7742c6b AW |
357 | case SCM_M_TOPLEVEL_REF: |
358 | if (SCM_VARIABLEP (mx)) | |
359 | return SCM_VARIABLE_REF (mx); | |
360 | else | |
57d23e25 | 361 | { |
b7742c6b | 362 | while (scm_is_pair (env)) |
f3a8d1b7 | 363 | env = CDR (env); |
3149a5b6 AW |
364 | return SCM_VARIABLE_REF |
365 | (scm_memoize_variable_access_x (x, CAPTURE_ENV (env))); | |
57d23e25 | 366 | } |
57d23e25 | 367 | |
b7742c6b AW |
368 | case SCM_M_TOPLEVEL_SET: |
369 | { | |
370 | SCM var = CAR (mx); | |
371 | SCM val = eval (CDR (mx), env); | |
372 | if (SCM_VARIABLEP (var)) | |
373 | { | |
374 | SCM_VARIABLE_SET (var, val); | |
375 | return SCM_UNSPECIFIED; | |
376 | } | |
377 | else | |
378 | { | |
379 | while (scm_is_pair (env)) | |
f3a8d1b7 | 380 | env = CDR (env); |
3149a5b6 AW |
381 | SCM_VARIABLE_SET |
382 | (scm_memoize_variable_access_x (x, CAPTURE_ENV (env)), | |
383 | val); | |
b7742c6b AW |
384 | return SCM_UNSPECIFIED; |
385 | } | |
386 | } | |
910b5125 | 387 | |
b7742c6b AW |
388 | case SCM_M_MODULE_REF: |
389 | if (SCM_VARIABLEP (mx)) | |
390 | return SCM_VARIABLE_REF (mx); | |
910b5125 | 391 | else |
3149a5b6 AW |
392 | return SCM_VARIABLE_REF |
393 | (scm_memoize_variable_access_x (x, SCM_BOOL_F)); | |
910b5125 | 394 | |
b7742c6b AW |
395 | case SCM_M_MODULE_SET: |
396 | if (SCM_VARIABLEP (CDR (mx))) | |
910b5125 | 397 | { |
b7742c6b AW |
398 | SCM_VARIABLE_SET (CDR (mx), eval (CAR (mx), env)); |
399 | return SCM_UNSPECIFIED; | |
400 | } | |
401 | else | |
402 | { | |
3149a5b6 AW |
403 | SCM_VARIABLE_SET |
404 | (scm_memoize_variable_access_x (x, SCM_BOOL_F), | |
405 | eval (CAR (mx), env)); | |
b7742c6b | 406 | return SCM_UNSPECIFIED; |
910b5125 | 407 | } |
910b5125 | 408 | |
747022e4 AW |
409 | case SCM_M_PROMPT: |
410 | { | |
d2964315 | 411 | SCM vm, prompt, handler, res; |
747022e4 | 412 | |
d2964315 AW |
413 | vm = scm_the_vm (); |
414 | prompt = scm_c_make_prompt (eval (CAR (mx), env), SCM_VM_DATA (vm)->fp, | |
415 | SCM_VM_DATA (vm)->sp, SCM_VM_DATA (vm)->ip, | |
adbdfd6d | 416 | 0, -1, scm_i_dynwinds ()); |
747022e4 AW |
417 | handler = eval (CDDR (mx), env); |
418 | scm_i_set_dynwinds (scm_cons (prompt, scm_i_dynwinds ())); | |
419 | ||
420 | if (SCM_PROMPT_SETJMP (prompt)) | |
421 | { | |
b8af64db | 422 | /* The prompt exited nonlocally. */ |
747022e4 | 423 | proc = handler; |
b8af64db | 424 | args = scm_i_prompt_pop_abort_args_x (prompt); |
747022e4 AW |
425 | goto apply_proc; |
426 | } | |
427 | ||
428 | res = eval (CADR (mx), env); | |
429 | scm_i_set_dynwinds (CDR (scm_i_dynwinds ())); | |
430 | return res; | |
431 | } | |
432 | ||
b7742c6b AW |
433 | default: |
434 | abort (); | |
435 | } | |
910b5125 DH |
436 | } |
437 | ||
b7742c6b | 438 | \f |
2a6f7afe | 439 | |
b7742c6b AW |
440 | /* Simple procedure calls |
441 | */ | |
2a6f7afe | 442 | |
b7742c6b AW |
443 | SCM |
444 | scm_call_0 (SCM proc) | |
445 | { | |
bf5a05f2 | 446 | return scm_c_vm_run (scm_the_vm (), proc, NULL, 0); |
0f2d19dd JB |
447 | } |
448 | ||
b7742c6b AW |
449 | SCM |
450 | scm_call_1 (SCM proc, SCM arg1) | |
212e58ed | 451 | { |
bf5a05f2 | 452 | return scm_c_vm_run (scm_the_vm (), proc, &arg1, 1); |
b7742c6b | 453 | } |
212e58ed | 454 | |
b7742c6b AW |
455 | SCM |
456 | scm_call_2 (SCM proc, SCM arg1, SCM arg2) | |
457 | { | |
bf5a05f2 AW |
458 | SCM args[] = { arg1, arg2 }; |
459 | return scm_c_vm_run (scm_the_vm (), proc, args, 2); | |
212e58ed DH |
460 | } |
461 | ||
b7742c6b AW |
462 | SCM |
463 | scm_call_3 (SCM proc, SCM arg1, SCM arg2, SCM arg3) | |
0f2d19dd | 464 | { |
bf5a05f2 AW |
465 | SCM args[] = { arg1, arg2, arg3 }; |
466 | return scm_c_vm_run (scm_the_vm (), proc, args, 3); | |
0f2d19dd JB |
467 | } |
468 | ||
b7742c6b AW |
469 | SCM |
470 | scm_call_4 (SCM proc, SCM arg1, SCM arg2, SCM arg3, SCM arg4) | |
212e58ed | 471 | { |
bf5a05f2 AW |
472 | SCM args[] = { arg1, arg2, arg3, arg4 }; |
473 | return scm_c_vm_run (scm_the_vm (), proc, args, 4); | |
212e58ed DH |
474 | } |
475 | ||
86fd6dff AW |
476 | SCM |
477 | scm_call_n (SCM proc, SCM *argv, size_t nargs) | |
478 | { | |
479 | return scm_c_vm_run (scm_the_vm (), proc, argv, nargs); | |
480 | } | |
481 | ||
b7742c6b | 482 | /* Simple procedure applies |
9fbee57e | 483 | */ |
cc56ba80 | 484 | |
b7742c6b AW |
485 | SCM |
486 | scm_apply_0 (SCM proc, SCM args) | |
487 | { | |
488 | return scm_apply (proc, args, SCM_EOL); | |
0f572ba7 DH |
489 | } |
490 | ||
b7742c6b AW |
491 | SCM |
492 | scm_apply_1 (SCM proc, SCM arg1, SCM args) | |
0f572ba7 | 493 | { |
b7742c6b | 494 | return scm_apply (proc, scm_cons (arg1, args), SCM_EOL); |
8ae95199 DH |
495 | } |
496 | ||
b7742c6b AW |
497 | SCM |
498 | scm_apply_2 (SCM proc, SCM arg1, SCM arg2, SCM args) | |
0f2d19dd | 499 | { |
b7742c6b | 500 | return scm_apply (proc, scm_cons2 (arg1, arg2, args), SCM_EOL); |
0f2d19dd JB |
501 | } |
502 | ||
b7742c6b AW |
503 | SCM |
504 | scm_apply_3 (SCM proc, SCM arg1, SCM arg2, SCM arg3, SCM args) | |
212e58ed | 505 | { |
b7742c6b AW |
506 | return scm_apply (proc, scm_cons (arg1, scm_cons2 (arg2, arg3, args)), |
507 | SCM_EOL); | |
212e58ed DH |
508 | } |
509 | ||
b7742c6b | 510 | /* This code processes the arguments to apply: |
8ea46249 | 511 | |
b7742c6b | 512 | (apply PROC ARG1 ... ARGS) |
302c12b4 | 513 | |
b7742c6b AW |
514 | Given a list (ARG1 ... ARGS), this function conses the ARG1 |
515 | ... arguments onto the front of ARGS, and returns the resulting | |
516 | list. Note that ARGS is a list; thus, the argument to this | |
517 | function is a list whose last element is a list. | |
302c12b4 | 518 | |
b7742c6b AW |
519 | Apply calls this function, and applies PROC to the elements of the |
520 | result. apply:nconc2last takes care of building the list of | |
521 | arguments, given (ARG1 ... ARGS). | |
a954ce1d | 522 | |
b7742c6b AW |
523 | Rather than do new consing, apply:nconc2last destroys its argument. |
524 | On that topic, this code came into my care with the following | |
525 | beautifully cryptic comment on that topic: "This will only screw | |
526 | you if you do (scm_apply scm_apply '( ... ))" If you know what | |
527 | they're referring to, send me a patch to this comment. */ | |
0f2d19dd | 528 | |
b7742c6b AW |
529 | SCM_DEFINE (scm_nconc2last, "apply:nconc2last", 1, 0, 0, |
530 | (SCM lst), | |
531 | "Given a list (@var{arg1} @dots{} @var{args}), this function\n" | |
532 | "conses the @var{arg1} @dots{} arguments onto the front of\n" | |
533 | "@var{args}, and returns the resulting list. Note that\n" | |
534 | "@var{args} is a list; thus, the argument to this function is\n" | |
535 | "a list whose last element is a list.\n" | |
536 | "Note: Rather than do new consing, @code{apply:nconc2last}\n" | |
537 | "destroys its argument, so use with care.") | |
538 | #define FUNC_NAME s_scm_nconc2last | |
212e58ed | 539 | { |
b7742c6b AW |
540 | SCM *lloc; |
541 | SCM_VALIDATE_NONEMPTYLIST (1, lst); | |
542 | lloc = &lst; | |
543 | while (!scm_is_null (SCM_CDR (*lloc))) /* Perhaps should be | |
544 | SCM_NULL_OR_NIL_P, but not | |
545 | needed in 99.99% of cases, | |
546 | and it could seriously hurt | |
547 | performance. - Neil */ | |
548 | lloc = SCM_CDRLOC (*lloc); | |
549 | SCM_ASSERT (scm_ilength (SCM_CAR (*lloc)) >= 0, lst, SCM_ARG1, FUNC_NAME); | |
550 | *lloc = SCM_CAR (*lloc); | |
551 | return lst; | |
212e58ed | 552 | } |
b7742c6b | 553 | #undef FUNC_NAME |
212e58ed | 554 | |
b8229a3b MS |
555 | |
556 | ||
b7742c6b | 557 | /* Typechecking for multi-argument MAP and FOR-EACH. |
0f2d19dd | 558 | |
b7742c6b AW |
559 | Verify that each element of the vector ARGV, except for the first, |
560 | is a proper list whose length is LEN. Attribute errors to WHO, | |
561 | and claim that the i'th element of ARGV is WHO's i+2'th argument. */ | |
562 | static inline void | |
563 | check_map_args (SCM argv, | |
564 | long len, | |
565 | SCM gf, | |
566 | SCM proc, | |
567 | SCM args, | |
568 | const char *who) | |
212e58ed | 569 | { |
b7742c6b | 570 | long i; |
0f2d19dd | 571 | |
b7742c6b | 572 | for (i = SCM_SIMPLE_VECTOR_LENGTH (argv) - 1; i >= 1; i--) |
9fbee57e | 573 | { |
b7742c6b AW |
574 | SCM elt = SCM_SIMPLE_VECTOR_REF (argv, i); |
575 | long elt_len = scm_ilength (elt); | |
5cb22e96 | 576 | |
b7742c6b AW |
577 | if (elt_len < 0) |
578 | { | |
579 | if (gf) | |
580 | scm_apply_generic (gf, scm_cons (proc, args)); | |
581 | else | |
582 | scm_wrong_type_arg (who, i + 2, elt); | |
583 | } | |
1cc91f1b | 584 | |
b7742c6b AW |
585 | if (elt_len != len) |
586 | scm_out_of_range_pos (who, elt, scm_from_long (i + 2)); | |
0f2d19dd | 587 | } |
0f2d19dd | 588 | } |
6dbd0af5 | 589 | |
212e58ed | 590 | |
b7742c6b | 591 | SCM_GPROC (s_map, "map", 2, 0, 1, scm_map, g_map); |
212e58ed | 592 | |
b7742c6b AW |
593 | /* Note: Currently, scm_map applies PROC to the argument list(s) |
594 | sequentially, starting with the first element(s). This is used in | |
595 | evalext.c where the Scheme procedure `map-in-order', which guarantees | |
596 | sequential behaviour, is implemented using scm_map. If the | |
597 | behaviour changes, we need to update `map-in-order'. | |
598 | */ | |
0f2d19dd | 599 | |
b7742c6b AW |
600 | SCM |
601 | scm_map (SCM proc, SCM arg1, SCM args) | |
602 | #define FUNC_NAME s_map | |
0f2d19dd | 603 | { |
b7742c6b AW |
604 | long i, len; |
605 | SCM res = SCM_EOL; | |
606 | SCM *pres = &res; | |
0f2d19dd | 607 | |
b7742c6b AW |
608 | len = scm_ilength (arg1); |
609 | SCM_GASSERTn (len >= 0, | |
610 | g_map, scm_cons2 (proc, arg1, args), SCM_ARG2, s_map); | |
611 | SCM_VALIDATE_REST_ARGUMENT (args); | |
612 | if (scm_is_null (args)) | |
0f2d19dd | 613 | { |
b7742c6b AW |
614 | SCM_GASSERT2 (scm_is_true (scm_procedure_p (proc)), g_map, proc, arg1, SCM_ARG1, s_map); |
615 | while (SCM_NIMP (arg1)) | |
616 | { | |
617 | *pres = scm_list_1 (scm_call_1 (proc, SCM_CAR (arg1))); | |
618 | pres = SCM_CDRLOC (*pres); | |
619 | arg1 = SCM_CDR (arg1); | |
620 | } | |
621 | return res; | |
0f2d19dd | 622 | } |
b7742c6b AW |
623 | if (scm_is_null (SCM_CDR (args))) |
624 | { | |
625 | SCM arg2 = SCM_CAR (args); | |
626 | int len2 = scm_ilength (arg2); | |
627 | SCM_GASSERTn (scm_is_true (scm_procedure_p (proc)), g_map, | |
628 | scm_cons2 (proc, arg1, args), SCM_ARG1, s_map); | |
629 | SCM_GASSERTn (len2 >= 0, | |
630 | g_map, scm_cons2 (proc, arg1, args), SCM_ARG3, s_map); | |
631 | if (len2 != len) | |
632 | SCM_OUT_OF_RANGE (3, arg2); | |
633 | while (SCM_NIMP (arg1)) | |
634 | { | |
635 | *pres = scm_list_1 (scm_call_2 (proc, SCM_CAR (arg1), SCM_CAR (arg2))); | |
636 | pres = SCM_CDRLOC (*pres); | |
637 | arg1 = SCM_CDR (arg1); | |
638 | arg2 = SCM_CDR (arg2); | |
639 | } | |
640 | return res; | |
641 | } | |
642 | arg1 = scm_cons (arg1, args); | |
643 | args = scm_vector (arg1); | |
644 | check_map_args (args, len, g_map, proc, arg1, s_map); | |
645 | while (1) | |
d6754c23 | 646 | { |
b7742c6b AW |
647 | arg1 = SCM_EOL; |
648 | for (i = SCM_SIMPLE_VECTOR_LENGTH (args) - 1; i >= 0; i--) | |
649 | { | |
650 | SCM elt = SCM_SIMPLE_VECTOR_REF (args, i); | |
651 | if (SCM_IMP (elt)) | |
652 | return res; | |
653 | arg1 = scm_cons (SCM_CAR (elt), arg1); | |
654 | SCM_SIMPLE_VECTOR_SET (args, i, SCM_CDR (elt)); | |
655 | } | |
656 | *pres = scm_list_1 (scm_apply (proc, arg1, SCM_EOL)); | |
657 | pres = SCM_CDRLOC (*pres); | |
d6754c23 | 658 | } |
0f2d19dd | 659 | } |
b7742c6b | 660 | #undef FUNC_NAME |
0f2d19dd | 661 | |
302c12b4 | 662 | |
b7742c6b | 663 | SCM_GPROC (s_for_each, "for-each", 2, 0, 1, scm_for_each, g_for_each); |
d6754c23 | 664 | |
b7742c6b AW |
665 | SCM |
666 | scm_for_each (SCM proc, SCM arg1, SCM args) | |
667 | #define FUNC_NAME s_for_each | |
0f2d19dd | 668 | { |
b7742c6b AW |
669 | long i, len; |
670 | len = scm_ilength (arg1); | |
671 | SCM_GASSERTn (len >= 0, g_for_each, scm_cons2 (proc, arg1, args), | |
672 | SCM_ARG2, s_for_each); | |
673 | SCM_VALIDATE_REST_ARGUMENT (args); | |
674 | if (scm_is_null (args)) | |
26d5b9b4 | 675 | { |
b7742c6b AW |
676 | SCM_GASSERT2 (scm_is_true (scm_procedure_p (proc)), g_for_each, |
677 | proc, arg1, SCM_ARG1, s_for_each); | |
678 | while (SCM_NIMP (arg1)) | |
679 | { | |
680 | scm_call_1 (proc, SCM_CAR (arg1)); | |
681 | arg1 = SCM_CDR (arg1); | |
682 | } | |
683 | return SCM_UNSPECIFIED; | |
26d5b9b4 | 684 | } |
b7742c6b | 685 | if (scm_is_null (SCM_CDR (args))) |
26d5b9b4 | 686 | { |
b7742c6b AW |
687 | SCM arg2 = SCM_CAR (args); |
688 | int len2 = scm_ilength (arg2); | |
689 | SCM_GASSERTn (scm_is_true (scm_procedure_p (proc)), g_for_each, | |
690 | scm_cons2 (proc, arg1, args), SCM_ARG1, s_for_each); | |
691 | SCM_GASSERTn (len2 >= 0, g_for_each, | |
692 | scm_cons2 (proc, arg1, args), SCM_ARG3, s_for_each); | |
693 | if (len2 != len) | |
694 | SCM_OUT_OF_RANGE (3, arg2); | |
695 | while (SCM_NIMP (arg1)) | |
696 | { | |
697 | scm_call_2 (proc, SCM_CAR (arg1), SCM_CAR (arg2)); | |
698 | arg1 = SCM_CDR (arg1); | |
699 | arg2 = SCM_CDR (arg2); | |
700 | } | |
701 | return SCM_UNSPECIFIED; | |
26d5b9b4 | 702 | } |
b7742c6b AW |
703 | arg1 = scm_cons (arg1, args); |
704 | args = scm_vector (arg1); | |
705 | check_map_args (args, len, g_for_each, proc, arg1, s_for_each); | |
706 | while (1) | |
302c12b4 | 707 | { |
b7742c6b AW |
708 | arg1 = SCM_EOL; |
709 | for (i = SCM_SIMPLE_VECTOR_LENGTH (args) - 1; i >= 0; i--) | |
71560395 | 710 | { |
b7742c6b AW |
711 | SCM elt = SCM_SIMPLE_VECTOR_REF (args, i); |
712 | if (SCM_IMP (elt)) | |
713 | return SCM_UNSPECIFIED; | |
714 | arg1 = scm_cons (SCM_CAR (elt), arg1); | |
715 | SCM_SIMPLE_VECTOR_SET (args, i, SCM_CDR (elt)); | |
716 | } | |
717 | scm_apply (proc, arg1, SCM_EOL); | |
718 | } | |
719 | } | |
720 | #undef FUNC_NAME | |
71560395 | 721 | |
71560395 | 722 | |
5f161164 AW |
723 | static SCM |
724 | scm_c_primitive_eval (SCM exp) | |
b7742c6b | 725 | { |
a310a1d1 | 726 | if (!SCM_EXPANDED_P (exp)) |
4f692ace | 727 | exp = scm_call_1 (scm_current_module_transformer (), exp); |
a310a1d1 | 728 | return eval (scm_memoize_expression (exp), SCM_EOL); |
b7742c6b | 729 | } |
5f161164 AW |
730 | |
731 | static SCM var_primitive_eval; | |
732 | SCM | |
733 | scm_primitive_eval (SCM exp) | |
734 | { | |
735 | return scm_c_vm_run (scm_the_vm (), scm_variable_ref (var_primitive_eval), | |
736 | &exp, 1); | |
737 | } | |
71560395 | 738 | |
b7742c6b AW |
739 | |
740 | /* Eval does not take the second arg optionally. This is intentional | |
741 | * in order to be R5RS compatible, and to prepare for the new module | |
742 | * system, where we would like to make the choice of evaluation | |
743 | * environment explicit. */ | |
744 | ||
745 | SCM_DEFINE (scm_eval, "eval", 2, 0, 0, | |
746 | (SCM exp, SCM module_or_state), | |
747 | "Evaluate @var{exp}, a list representing a Scheme expression,\n" | |
748 | "in the top-level environment specified by\n" | |
749 | "@var{module_or_state}.\n" | |
750 | "While @var{exp} is evaluated (using @code{primitive-eval}),\n" | |
751 | "@var{module_or_state} is made the current module when\n" | |
752 | "it is a module, or the current dynamic state when it is\n" | |
753 | "a dynamic state." | |
754 | "Example: (eval '(+ 1 2) (interaction-environment))") | |
755 | #define FUNC_NAME s_scm_eval | |
756 | { | |
757 | SCM res; | |
758 | ||
759 | scm_dynwind_begin (SCM_F_DYNWIND_REWINDABLE); | |
760 | if (scm_is_dynamic_state (module_or_state)) | |
761 | scm_dynwind_current_dynamic_state (module_or_state); | |
762 | else if (scm_module_system_booted_p) | |
763 | { | |
764 | SCM_VALIDATE_MODULE (2, module_or_state); | |
765 | scm_dynwind_current_module (module_or_state); | |
71560395 | 766 | } |
b7742c6b | 767 | /* otherwise if the module system isn't booted, ignore the module arg */ |
71560395 | 768 | |
b7742c6b AW |
769 | res = scm_primitive_eval (exp); |
770 | ||
771 | scm_dynwind_end (); | |
772 | return res; | |
773 | } | |
774 | #undef FUNC_NAME | |
71560395 AW |
775 | |
776 | ||
b7742c6b | 777 | static SCM f_apply; |
71560395 AW |
778 | |
779 | /* Apply a function to a list of arguments. | |
780 | ||
781 | This function is exported to the Scheme level as taking two | |
782 | required arguments and a tail argument, as if it were: | |
783 | (lambda (proc arg1 . args) ...) | |
784 | Thus, if you just have a list of arguments to pass to a procedure, | |
785 | pass the list as ARG1, and '() for ARGS. If you have some fixed | |
786 | args, pass the first as ARG1, then cons any remaining fixed args | |
787 | onto the front of your argument list, and pass that as ARGS. */ | |
788 | ||
789 | SCM | |
790 | scm_apply (SCM proc, SCM arg1, SCM args) | |
791 | { | |
b7742c6b | 792 | /* Fix things up so that args contains all args. */ |
71560395 | 793 | if (scm_is_null (args)) |
b7742c6b | 794 | args = arg1; |
71560395 | 795 | else |
b7742c6b | 796 | args = scm_cons_star (arg1, args); |
71560395 | 797 | |
ea9f4f4b | 798 | return scm_call_with_vm (scm_the_vm (), proc, args); |
b7742c6b | 799 | } |
434f2f7a | 800 | |
7572ee52 AW |
801 | static void |
802 | prepare_boot_closure_env_for_apply (SCM proc, SCM args, | |
803 | SCM *out_body, SCM *out_env) | |
314b8716 | 804 | { |
8f9c5b58 AW |
805 | int nreq = BOOT_CLOSURE_NUM_REQUIRED_ARGS (proc); |
806 | SCM env = BOOT_CLOSURE_ENV (proc); | |
dc3e203e | 807 | |
8f9c5b58 AW |
808 | if (BOOT_CLOSURE_IS_FIXED (proc) |
809 | || (BOOT_CLOSURE_IS_REST (proc) | |
810 | && !BOOT_CLOSURE_HAS_REST_ARGS (proc))) | |
811 | { | |
812 | if (SCM_UNLIKELY (scm_ilength (args) != nreq)) | |
813 | scm_wrong_num_args (proc); | |
814 | for (; scm_is_pair (args); args = CDR (args)) | |
815 | env = scm_cons (CAR (args), env); | |
7572ee52 AW |
816 | *out_body = BOOT_CLOSURE_BODY (proc); |
817 | *out_env = env; | |
8f9c5b58 AW |
818 | } |
819 | else if (BOOT_CLOSURE_IS_REST (proc)) | |
314b8716 AW |
820 | { |
821 | if (SCM_UNLIKELY (scm_ilength (args) < nreq)) | |
8f9c5b58 | 822 | scm_wrong_num_args (proc); |
314b8716 | 823 | for (; nreq; nreq--, args = CDR (args)) |
8f9c5b58 AW |
824 | env = scm_cons (CAR (args), env); |
825 | env = scm_cons (args, env); | |
7572ee52 AW |
826 | *out_body = BOOT_CLOSURE_BODY (proc); |
827 | *out_env = env; | |
314b8716 AW |
828 | } |
829 | else | |
d8a071fc AW |
830 | { |
831 | int i, argc, nreq, nopt; | |
832 | SCM body, rest, kw, inits, alt; | |
dc3e203e | 833 | SCM mx = BOOT_CLOSURE_CODE (proc); |
d8a071fc | 834 | |
7572ee52 | 835 | loop: |
dc3e203e | 836 | BOOT_CLOSURE_PARSE_FULL (mx, body, nargs, rest, nopt, kw, inits, alt); |
d8a071fc AW |
837 | |
838 | argc = scm_ilength (args); | |
839 | if (argc < nreq) | |
840 | { | |
841 | if (scm_is_true (alt)) | |
7572ee52 | 842 | { |
dc3e203e | 843 | mx = alt; |
7572ee52 AW |
844 | goto loop; |
845 | } | |
d8a071fc AW |
846 | else |
847 | scm_wrong_num_args (proc); | |
848 | } | |
849 | if (scm_is_false (kw) && argc > nreq + nopt && scm_is_false (rest)) | |
850 | { | |
851 | if (scm_is_true (alt)) | |
7572ee52 | 852 | { |
dc3e203e | 853 | mx = alt; |
7572ee52 AW |
854 | goto loop; |
855 | } | |
d8a071fc AW |
856 | else |
857 | scm_wrong_num_args (proc); | |
858 | } | |
859 | ||
860 | for (i = 0; i < nreq; i++, args = CDR (args)) | |
861 | env = scm_cons (CAR (args), env); | |
862 | ||
863 | if (scm_is_false (kw)) | |
864 | { | |
865 | /* Optional args (possibly), but no keyword args. */ | |
866 | for (; i < argc && i < nreq + nopt; | |
867 | i++, args = CDR (args)) | |
868 | { | |
869 | env = scm_cons (CAR (args), env); | |
870 | inits = CDR (inits); | |
871 | } | |
872 | ||
873 | for (; i < nreq + nopt; i++, inits = CDR (inits)) | |
874 | env = scm_cons (eval (CAR (inits), env), env); | |
875 | ||
876 | if (scm_is_true (rest)) | |
877 | env = scm_cons (args, env); | |
878 | } | |
879 | else | |
880 | { | |
881 | SCM aok; | |
882 | ||
883 | aok = CAR (kw); | |
884 | kw = CDR (kw); | |
885 | ||
886 | /* Keyword args. As before, but stop at the first keyword. */ | |
887 | for (; i < argc && i < nreq + nopt && !scm_is_keyword (CAR (args)); | |
888 | i++, args = CDR (args), inits = CDR (inits)) | |
889 | env = scm_cons (CAR (args), env); | |
890 | ||
891 | for (; i < nreq + nopt; i++, inits = CDR (inits)) | |
892 | env = scm_cons (eval (CAR (inits), env), env); | |
893 | ||
894 | if (scm_is_true (rest)) | |
895 | { | |
896 | env = scm_cons (args, env); | |
897 | i++; | |
898 | } | |
899 | ||
900 | /* Now fill in env with unbound values, limn the rest of the args for | |
901 | keywords, and fill in unbound values with their inits. */ | |
902 | { | |
903 | int imax = i - 1; | |
904 | int kw_start_idx = i; | |
905 | SCM walk, k, v; | |
906 | for (walk = kw; scm_is_pair (walk); walk = CDR (walk)) | |
907 | if (SCM_I_INUM (CDAR (walk)) > imax) | |
908 | imax = SCM_I_INUM (CDAR (walk)); | |
909 | for (; i <= imax; i++) | |
910 | env = scm_cons (SCM_UNDEFINED, env); | |
911 | ||
912 | if (scm_is_pair (args) && scm_is_pair (CDR (args))) | |
913 | for (; scm_is_pair (args) && scm_is_pair (CDR (args)); | |
914 | args = CDR (args)) | |
915 | { | |
916 | k = CAR (args); v = CADR (args); | |
917 | if (!scm_is_keyword (k)) | |
918 | { | |
919 | if (scm_is_true (rest)) | |
920 | continue; | |
921 | else | |
922 | break; | |
923 | } | |
924 | for (walk = kw; scm_is_pair (walk); walk = CDR (walk)) | |
925 | if (scm_is_eq (k, CAAR (walk))) | |
926 | { | |
927 | /* Well... ok, list-set! isn't the nicest interface, but | |
928 | hey. */ | |
929 | int iset = imax - SCM_I_INUM (CDAR (walk)); | |
930 | scm_list_set_x (env, SCM_I_MAKINUM (iset), v); | |
931 | args = CDR (args); | |
932 | break; | |
933 | } | |
934 | if (scm_is_null (walk) && scm_is_false (aok)) | |
935 | error_unrecognized_keyword (proc); | |
936 | } | |
937 | if (scm_is_pair (args) && scm_is_false (rest)) | |
938 | error_invalid_keyword (proc); | |
939 | ||
940 | /* Now fill in unbound values, evaluating init expressions in their | |
941 | appropriate environment. */ | |
942 | for (i = imax - kw_start_idx; scm_is_pair (inits); i--, inits = CDR (inits)) | |
943 | { | |
944 | SCM tail = scm_list_tail (env, SCM_I_MAKINUM (i)); | |
945 | if (SCM_UNBNDP (CAR (tail))) | |
946 | SCM_SETCAR (tail, eval (CAR (inits), CDR (tail))); | |
947 | } | |
948 | } | |
949 | } | |
8f9c5b58 | 950 | |
dc3e203e | 951 | *out_body = body; |
7572ee52 AW |
952 | *out_env = env; |
953 | } | |
8f9c5b58 AW |
954 | } |
955 | ||
7572ee52 | 956 | static void |
8f9c5b58 | 957 | prepare_boot_closure_env_for_eval (SCM proc, unsigned int argc, |
7572ee52 | 958 | SCM exps, SCM *out_body, SCM *inout_env) |
8f9c5b58 AW |
959 | { |
960 | int nreq = BOOT_CLOSURE_NUM_REQUIRED_ARGS (proc); | |
961 | SCM new_env = BOOT_CLOSURE_ENV (proc); | |
962 | if (BOOT_CLOSURE_IS_FIXED (proc) | |
963 | || (BOOT_CLOSURE_IS_REST (proc) | |
964 | && !BOOT_CLOSURE_HAS_REST_ARGS (proc))) | |
314b8716 | 965 | { |
8f9c5b58 | 966 | for (; scm_is_pair (exps); exps = CDR (exps), nreq--) |
7572ee52 | 967 | new_env = scm_cons (eval (CAR (exps), *inout_env), new_env); |
8f9c5b58 AW |
968 | if (SCM_UNLIKELY (nreq != 0)) |
969 | scm_wrong_num_args (proc); | |
7572ee52 AW |
970 | *out_body = BOOT_CLOSURE_BODY (proc); |
971 | *inout_env = new_env; | |
314b8716 | 972 | } |
8f9c5b58 AW |
973 | else if (BOOT_CLOSURE_IS_REST (proc)) |
974 | { | |
975 | if (SCM_UNLIKELY (argc < nreq)) | |
976 | scm_wrong_num_args (proc); | |
977 | for (; nreq; nreq--, exps = CDR (exps)) | |
7572ee52 | 978 | new_env = scm_cons (eval (CAR (exps), *inout_env), new_env); |
8f9c5b58 AW |
979 | { |
980 | SCM rest = SCM_EOL; | |
981 | for (; scm_is_pair (exps); exps = CDR (exps)) | |
7572ee52 | 982 | rest = scm_cons (eval (CAR (exps), *inout_env), rest); |
8f9c5b58 AW |
983 | new_env = scm_cons (scm_reverse (rest), |
984 | new_env); | |
985 | } | |
7572ee52 AW |
986 | *out_body = BOOT_CLOSURE_BODY (proc); |
987 | *inout_env = new_env; | |
8f9c5b58 AW |
988 | } |
989 | else | |
d8a071fc AW |
990 | { |
991 | SCM args = SCM_EOL; | |
992 | for (; scm_is_pair (exps); exps = CDR (exps)) | |
7572ee52 AW |
993 | args = scm_cons (eval (CAR (exps), *inout_env), args); |
994 | args = scm_reverse_x (args, SCM_UNDEFINED); | |
995 | prepare_boot_closure_env_for_apply (proc, args, out_body, inout_env); | |
d8a071fc | 996 | } |
8f9c5b58 AW |
997 | } |
998 | ||
999 | static SCM | |
1000 | boot_closure_apply (SCM closure, SCM args) | |
1001 | { | |
7572ee52 AW |
1002 | SCM body, env; |
1003 | prepare_boot_closure_env_for_apply (closure, args, &body, &env); | |
1004 | return eval (body, env); | |
314b8716 AW |
1005 | } |
1006 | ||
1007 | static int | |
1008 | boot_closure_print (SCM closure, SCM port, scm_print_state *pstate) | |
1009 | { | |
1010 | SCM args; | |
1011 | scm_puts ("#<boot-closure ", port); | |
3d27ef4b | 1012 | scm_uintprint ((scm_t_bits)SCM2PTR (closure), 16, port); |
314b8716 AW |
1013 | scm_putc (' ', port); |
1014 | args = scm_make_list (scm_from_int (BOOT_CLOSURE_NUM_REQUIRED_ARGS (closure)), | |
1015 | scm_from_locale_symbol ("_")); | |
8f9c5b58 | 1016 | if (!BOOT_CLOSURE_IS_FIXED (closure) && BOOT_CLOSURE_HAS_REST_ARGS (closure)) |
314b8716 | 1017 | args = scm_cons_star (scm_from_locale_symbol ("_"), args); |
7572ee52 | 1018 | /* FIXME: optionals and rests */ |
314b8716 AW |
1019 | scm_display (args, port); |
1020 | scm_putc ('>', port); | |
1021 | return 1; | |
1022 | } | |
1023 | ||
0f2d19dd JB |
1024 | void |
1025 | scm_init_eval () | |
0f2d19dd | 1026 | { |
5f161164 AW |
1027 | SCM primitive_eval; |
1028 | ||
df9ca8d8 | 1029 | f_apply = scm_c_define_gsubr ("apply", 2, 0, 1, scm_apply); |
86d31dfe | 1030 | |
314b8716 AW |
1031 | scm_tc16_boot_closure = scm_make_smob_type ("boot-closure", 0); |
1032 | scm_set_smob_apply (scm_tc16_boot_closure, boot_closure_apply, 0, 0, 1); | |
1033 | scm_set_smob_print (scm_tc16_boot_closure, boot_closure_print); | |
1034 | ||
5f161164 AW |
1035 | primitive_eval = scm_c_make_gsubr ("primitive-eval", 1, 0, 0, |
1036 | scm_c_primitive_eval); | |
1037 | var_primitive_eval = scm_define (SCM_SUBR_NAME (primitive_eval), | |
1038 | primitive_eval); | |
1039 | ||
a0599745 | 1040 | #include "libguile/eval.x" |
0f2d19dd | 1041 | } |
0f2d19dd | 1042 | |
89e00824 ML |
1043 | /* |
1044 | Local Variables: | |
1045 | c-file-style: "gnu" | |
1046 | End: | |
1047 | */ | |
62560650 | 1048 |