Commit | Line | Data |
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4a655e50 | 1 | /* Copyright (C) 1995,1996,1997,1998,1999,2000,2001,2002,2003,2004,2005,2006,2007,2008,2009,2010,2011 |
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 | { | |
4a655e50 | 165 | scm_error_scm (scm_from_latin1_symbol ("keyword-argument-error"), proc, |
d8a071fc AW |
166 | scm_from_locale_string ("Invalid keyword"), SCM_EOL, |
167 | SCM_BOOL_F); | |
168 | } | |
169 | ||
170 | static void error_unrecognized_keyword (SCM proc) | |
171 | { | |
4a655e50 | 172 | scm_error_scm (scm_from_latin1_symbol ("keyword-argument-error"), proc, |
d8a071fc AW |
173 | scm_from_locale_string ("Unrecognized keyword"), SCM_EOL, |
174 | SCM_BOOL_F); | |
175 | } | |
176 | ||
177 | ||
f3a9a51d AW |
178 | /* Multiple values truncation. */ |
179 | static SCM | |
180 | truncate_values (SCM x) | |
181 | { | |
182 | if (SCM_LIKELY (!SCM_VALUESP (x))) | |
183 | return x; | |
184 | else | |
185 | { | |
186 | SCM l = scm_struct_ref (x, SCM_INUM0); | |
187 | if (SCM_LIKELY (scm_is_pair (l))) | |
188 | return scm_car (l); | |
189 | else | |
190 | { | |
191 | scm_ithrow (scm_from_latin1_symbol ("vm-run"), | |
192 | scm_list_3 (scm_from_latin1_symbol ("vm-run"), | |
193 | scm_from_locale_string | |
194 | ("Too few values returned to continuation"), | |
195 | SCM_EOL), | |
196 | 1); | |
197 | /* Not reached. */ | |
198 | return SCM_BOOL_F; | |
199 | } | |
200 | } | |
201 | } | |
202 | #define EVAL1(x, env) (truncate_values (eval ((x), (env)))) | |
203 | ||
b7742c6b | 204 | /* the environment: |
3149a5b6 | 205 | (VAL ... . MOD) |
b7742c6b AW |
206 | If MOD is #f, it means the environment was captured before modules were |
207 | booted. | |
208 | If MOD is the literal value '(), we are evaluating at the top level, and so | |
209 | should track changes to the current module. You have to be careful in this | |
210 | case, because further lexical contours should capture the current module. | |
211 | */ | |
212 | #define CAPTURE_ENV(env) \ | |
213 | ((env == SCM_EOL) ? scm_current_module () : \ | |
214 | ((env == SCM_BOOL_F) ? scm_the_root_module () : env)) | |
6f81708a DH |
215 | |
216 | static SCM | |
b7742c6b | 217 | eval (SCM x, SCM env) |
6f81708a | 218 | { |
b7742c6b AW |
219 | SCM mx; |
220 | SCM proc = SCM_UNDEFINED, args = SCM_EOL; | |
b7ecadca | 221 | unsigned int argc; |
6f81708a | 222 | |
b7742c6b AW |
223 | loop: |
224 | SCM_TICK; | |
225 | if (!SCM_MEMOIZED_P (x)) | |
226 | abort (); | |
227 | ||
228 | mx = SCM_MEMOIZED_ARGS (x); | |
229 | switch (SCM_MEMOIZED_TAG (x)) | |
230 | { | |
231 | case SCM_M_BEGIN: | |
232 | for (; !scm_is_null (CDR (mx)); mx = CDR (mx)) | |
233 | eval (CAR (mx), env); | |
234 | x = CAR (mx); | |
235 | goto loop; | |
236 | ||
237 | case SCM_M_IF: | |
f3a9a51d | 238 | if (scm_is_true (EVAL1 (CAR (mx), env))) |
b7742c6b | 239 | x = CADR (mx); |
6f81708a | 240 | else |
b7742c6b AW |
241 | x = CDDR (mx); |
242 | goto loop; | |
5fb64383 | 243 | |
b7742c6b AW |
244 | case SCM_M_LET: |
245 | { | |
246 | SCM inits = CAR (mx); | |
247 | SCM new_env = CAPTURE_ENV (env); | |
248 | for (; scm_is_pair (inits); inits = CDR (inits)) | |
f3a9a51d AW |
249 | new_env = scm_cons (EVAL1 (CAR (inits), env), |
250 | new_env); | |
b7742c6b AW |
251 | env = new_env; |
252 | x = CDR (mx); | |
253 | goto loop; | |
254 | } | |
255 | ||
256 | case SCM_M_LAMBDA: | |
314b8716 | 257 | RETURN_BOOT_CLOSURE (mx, CAPTURE_ENV (env)); |
5fb64383 | 258 | |
b7742c6b AW |
259 | case SCM_M_QUOTE: |
260 | return mx; | |
0f2d19dd | 261 | |
b7742c6b | 262 | case SCM_M_DEFINE: |
f3a9a51d | 263 | scm_define (CAR (mx), EVAL1 (CDR (mx), env)); |
b7742c6b | 264 | return SCM_UNSPECIFIED; |
212e58ed | 265 | |
d69531e2 AW |
266 | case SCM_M_DYNWIND: |
267 | { | |
268 | SCM in, out, res, old_winds; | |
f3a9a51d AW |
269 | in = EVAL1 (CAR (mx), env); |
270 | out = EVAL1 (CDDR (mx), env); | |
d69531e2 AW |
271 | scm_call_0 (in); |
272 | old_winds = scm_i_dynwinds (); | |
273 | scm_i_set_dynwinds (scm_acons (in, out, old_winds)); | |
274 | res = eval (CADR (mx), env); | |
275 | scm_i_set_dynwinds (old_winds); | |
276 | scm_call_0 (out); | |
277 | return res; | |
278 | } | |
279 | ||
bb0229b5 AW |
280 | case SCM_M_WITH_FLUIDS: |
281 | { | |
282 | long i, len; | |
283 | SCM *fluidv, *valuesv, walk, wf, res; | |
284 | len = scm_ilength (CAR (mx)); | |
285 | fluidv = alloca (sizeof (SCM)*len); | |
286 | for (i = 0, walk = CAR (mx); i < len; i++, walk = CDR (walk)) | |
f3a9a51d | 287 | fluidv[i] = EVAL1 (CAR (walk), env); |
bb0229b5 AW |
288 | valuesv = alloca (sizeof (SCM)*len); |
289 | for (i = 0, walk = CADR (mx); i < len; i++, walk = CDR (walk)) | |
f3a9a51d | 290 | valuesv[i] = EVAL1 (CAR (walk), env); |
bb0229b5 AW |
291 | |
292 | wf = scm_i_make_with_fluids (len, fluidv, valuesv); | |
293 | scm_i_swap_with_fluids (wf, SCM_I_CURRENT_THREAD->dynamic_state); | |
294 | scm_i_set_dynwinds (scm_cons (wf, scm_i_dynwinds ())); | |
295 | res = eval (CDDR (mx), env); | |
296 | scm_i_swap_with_fluids (wf, SCM_I_CURRENT_THREAD->dynamic_state); | |
297 | scm_i_set_dynwinds (CDR (scm_i_dynwinds ())); | |
298 | ||
299 | return res; | |
300 | } | |
301 | ||
b7742c6b AW |
302 | case SCM_M_APPLY: |
303 | /* Evaluate the procedure to be applied. */ | |
f3a9a51d | 304 | proc = EVAL1 (CAR (mx), env); |
b7742c6b | 305 | /* Evaluate the argument holding the list of arguments */ |
f3a9a51d | 306 | args = EVAL1 (CADR (mx), env); |
b7742c6b AW |
307 | |
308 | apply_proc: | |
309 | /* Go here to tail-apply a procedure. PROC is the procedure and | |
310 | * ARGS is the list of arguments. */ | |
314b8716 | 311 | if (BOOT_CLOSURE_P (proc)) |
b7742c6b | 312 | { |
7572ee52 | 313 | prepare_boot_closure_env_for_apply (proc, args, &x, &env); |
b7742c6b AW |
314 | goto loop; |
315 | } | |
316 | else | |
ea9f4f4b | 317 | return scm_call_with_vm (scm_the_vm (), proc, args); |
212e58ed | 318 | |
b7742c6b AW |
319 | case SCM_M_CALL: |
320 | /* Evaluate the procedure to be applied. */ | |
f3a9a51d | 321 | proc = EVAL1 (CAR (mx), env); |
b7ecadca | 322 | argc = SCM_I_INUM (CADR (mx)); |
9331f91c | 323 | mx = CDDR (mx); |
212e58ed | 324 | |
314b8716 | 325 | if (BOOT_CLOSURE_P (proc)) |
5fa0939c | 326 | { |
7572ee52 | 327 | prepare_boot_closure_env_for_eval (proc, argc, mx, &x, &env); |
b7742c6b | 328 | goto loop; |
5fa0939c | 329 | } |
b7742c6b AW |
330 | else |
331 | { | |
e2cf8eb9 | 332 | SCM *argv; |
b7ecadca LC |
333 | unsigned int i; |
334 | ||
e2cf8eb9 | 335 | argv = alloca (argc * sizeof (SCM)); |
b7ecadca | 336 | for (i = 0; i < argc; i++, mx = CDR (mx)) |
f3a9a51d | 337 | argv[i] = EVAL1 (CAR (mx), env); |
b7ecadca LC |
338 | |
339 | return scm_c_vm_run (scm_the_vm (), proc, argv, argc); | |
b7742c6b | 340 | } |
b7ecadca | 341 | |
b7742c6b | 342 | case SCM_M_CONT: |
f3a9a51d | 343 | return scm_i_call_with_current_continuation (EVAL1 (mx, env)); |
212e58ed | 344 | |
b7742c6b AW |
345 | case SCM_M_CALL_WITH_VALUES: |
346 | { | |
347 | SCM producer; | |
348 | SCM v; | |
349 | ||
f3a9a51d AW |
350 | producer = EVAL1 (CAR (mx), env); |
351 | /* `proc' is the consumer. */ | |
352 | proc = EVAL1 (CDR (mx), env); | |
ea9f4f4b | 353 | v = scm_call_with_vm (scm_the_vm (), producer, SCM_EOL); |
b7742c6b AW |
354 | if (SCM_VALUESP (v)) |
355 | args = scm_struct_ref (v, SCM_INUM0); | |
356 | else | |
357 | args = scm_list_1 (v); | |
358 | goto apply_proc; | |
359 | } | |
26d5b9b4 | 360 | |
b7742c6b AW |
361 | case SCM_M_LEXICAL_REF: |
362 | { | |
363 | int n; | |
364 | SCM ret; | |
365 | for (n = SCM_I_INUM (mx); n; n--) | |
366 | env = CDR (env); | |
367 | ret = CAR (env); | |
368 | if (SCM_UNLIKELY (SCM_UNBNDP (ret))) | |
369 | /* we don't know what variable, though, because we don't have its | |
370 | name */ | |
371 | error_used_before_defined (); | |
372 | return ret; | |
373 | } | |
1cc91f1b | 374 | |
b7742c6b AW |
375 | case SCM_M_LEXICAL_SET: |
376 | { | |
377 | int n; | |
f3a9a51d | 378 | SCM val = EVAL1 (CDR (mx), env); |
b7742c6b AW |
379 | for (n = SCM_I_INUM (CAR (mx)); n; n--) |
380 | env = CDR (env); | |
381 | SCM_SETCAR (env, val); | |
382 | return SCM_UNSPECIFIED; | |
383 | } | |
910b5125 | 384 | |
b7742c6b AW |
385 | case SCM_M_TOPLEVEL_REF: |
386 | if (SCM_VARIABLEP (mx)) | |
387 | return SCM_VARIABLE_REF (mx); | |
388 | else | |
57d23e25 | 389 | { |
b7742c6b | 390 | while (scm_is_pair (env)) |
f3a8d1b7 | 391 | env = CDR (env); |
3149a5b6 AW |
392 | return SCM_VARIABLE_REF |
393 | (scm_memoize_variable_access_x (x, CAPTURE_ENV (env))); | |
57d23e25 | 394 | } |
57d23e25 | 395 | |
b7742c6b AW |
396 | case SCM_M_TOPLEVEL_SET: |
397 | { | |
398 | SCM var = CAR (mx); | |
f3a9a51d | 399 | SCM val = EVAL1 (CDR (mx), env); |
b7742c6b AW |
400 | if (SCM_VARIABLEP (var)) |
401 | { | |
402 | SCM_VARIABLE_SET (var, val); | |
403 | return SCM_UNSPECIFIED; | |
404 | } | |
405 | else | |
406 | { | |
407 | while (scm_is_pair (env)) | |
f3a8d1b7 | 408 | env = CDR (env); |
3149a5b6 AW |
409 | SCM_VARIABLE_SET |
410 | (scm_memoize_variable_access_x (x, CAPTURE_ENV (env)), | |
411 | val); | |
b7742c6b AW |
412 | return SCM_UNSPECIFIED; |
413 | } | |
414 | } | |
910b5125 | 415 | |
b7742c6b AW |
416 | case SCM_M_MODULE_REF: |
417 | if (SCM_VARIABLEP (mx)) | |
418 | return SCM_VARIABLE_REF (mx); | |
910b5125 | 419 | else |
3149a5b6 AW |
420 | return SCM_VARIABLE_REF |
421 | (scm_memoize_variable_access_x (x, SCM_BOOL_F)); | |
910b5125 | 422 | |
b7742c6b AW |
423 | case SCM_M_MODULE_SET: |
424 | if (SCM_VARIABLEP (CDR (mx))) | |
910b5125 | 425 | { |
f3a9a51d | 426 | SCM_VARIABLE_SET (CDR (mx), EVAL1 (CAR (mx), env)); |
b7742c6b AW |
427 | return SCM_UNSPECIFIED; |
428 | } | |
429 | else | |
430 | { | |
3149a5b6 AW |
431 | SCM_VARIABLE_SET |
432 | (scm_memoize_variable_access_x (x, SCM_BOOL_F), | |
f3a9a51d | 433 | EVAL1 (CAR (mx), env)); |
b7742c6b | 434 | return SCM_UNSPECIFIED; |
910b5125 | 435 | } |
910b5125 | 436 | |
747022e4 AW |
437 | case SCM_M_PROMPT: |
438 | { | |
7112a34d AW |
439 | SCM vm, res; |
440 | /* We need the prompt and handler values after a longjmp case, | |
441 | so make sure they are volatile. */ | |
442 | volatile SCM handler, prompt; | |
747022e4 | 443 | |
d2964315 | 444 | vm = scm_the_vm (); |
f3a9a51d AW |
445 | prompt = scm_c_make_prompt (EVAL1 (CAR (mx), env), |
446 | SCM_VM_DATA (vm)->fp, | |
d2964315 | 447 | SCM_VM_DATA (vm)->sp, SCM_VM_DATA (vm)->ip, |
adbdfd6d | 448 | 0, -1, scm_i_dynwinds ()); |
f3a9a51d | 449 | handler = EVAL1 (CDDR (mx), env); |
747022e4 AW |
450 | scm_i_set_dynwinds (scm_cons (prompt, scm_i_dynwinds ())); |
451 | ||
452 | if (SCM_PROMPT_SETJMP (prompt)) | |
453 | { | |
b8af64db | 454 | /* The prompt exited nonlocally. */ |
747022e4 | 455 | proc = handler; |
572eef50 | 456 | args = scm_i_prompt_pop_abort_args_x (scm_the_vm ()); |
747022e4 AW |
457 | goto apply_proc; |
458 | } | |
459 | ||
460 | res = eval (CADR (mx), env); | |
461 | scm_i_set_dynwinds (CDR (scm_i_dynwinds ())); | |
462 | return res; | |
463 | } | |
464 | ||
b7742c6b AW |
465 | default: |
466 | abort (); | |
467 | } | |
910b5125 DH |
468 | } |
469 | ||
b7742c6b | 470 | \f |
2a6f7afe | 471 | |
b7742c6b AW |
472 | /* Simple procedure calls |
473 | */ | |
2a6f7afe | 474 | |
b7742c6b AW |
475 | SCM |
476 | scm_call_0 (SCM proc) | |
477 | { | |
bf5a05f2 | 478 | return scm_c_vm_run (scm_the_vm (), proc, NULL, 0); |
0f2d19dd JB |
479 | } |
480 | ||
b7742c6b AW |
481 | SCM |
482 | scm_call_1 (SCM proc, SCM arg1) | |
212e58ed | 483 | { |
bf5a05f2 | 484 | return scm_c_vm_run (scm_the_vm (), proc, &arg1, 1); |
b7742c6b | 485 | } |
212e58ed | 486 | |
b7742c6b AW |
487 | SCM |
488 | scm_call_2 (SCM proc, SCM arg1, SCM arg2) | |
489 | { | |
bf5a05f2 AW |
490 | SCM args[] = { arg1, arg2 }; |
491 | return scm_c_vm_run (scm_the_vm (), proc, args, 2); | |
212e58ed DH |
492 | } |
493 | ||
b7742c6b AW |
494 | SCM |
495 | scm_call_3 (SCM proc, SCM arg1, SCM arg2, SCM arg3) | |
0f2d19dd | 496 | { |
bf5a05f2 AW |
497 | SCM args[] = { arg1, arg2, arg3 }; |
498 | return scm_c_vm_run (scm_the_vm (), proc, args, 3); | |
0f2d19dd JB |
499 | } |
500 | ||
b7742c6b AW |
501 | SCM |
502 | scm_call_4 (SCM proc, SCM arg1, SCM arg2, SCM arg3, SCM arg4) | |
212e58ed | 503 | { |
bf5a05f2 AW |
504 | SCM args[] = { arg1, arg2, arg3, arg4 }; |
505 | return scm_c_vm_run (scm_the_vm (), proc, args, 4); | |
212e58ed DH |
506 | } |
507 | ||
f32e67be AW |
508 | SCM |
509 | scm_call_5 (SCM proc, SCM arg1, SCM arg2, SCM arg3, SCM arg4, SCM arg5) | |
510 | { | |
511 | SCM args[] = { arg1, arg2, arg3, arg4, arg5 }; | |
512 | return scm_c_vm_run (scm_the_vm (), proc, args, 5); | |
513 | } | |
514 | ||
515 | SCM | |
516 | scm_call_6 (SCM proc, SCM arg1, SCM arg2, SCM arg3, SCM arg4, SCM arg5, | |
517 | SCM arg6) | |
518 | { | |
519 | SCM args[] = { arg1, arg2, arg3, arg4, arg5, arg6 }; | |
520 | return scm_c_vm_run (scm_the_vm (), proc, args, 6); | |
521 | } | |
522 | ||
86fd6dff AW |
523 | SCM |
524 | scm_call_n (SCM proc, SCM *argv, size_t nargs) | |
525 | { | |
526 | return scm_c_vm_run (scm_the_vm (), proc, argv, nargs); | |
527 | } | |
528 | ||
b7742c6b | 529 | /* Simple procedure applies |
9fbee57e | 530 | */ |
cc56ba80 | 531 | |
b7742c6b AW |
532 | SCM |
533 | scm_apply_0 (SCM proc, SCM args) | |
534 | { | |
535 | return scm_apply (proc, args, SCM_EOL); | |
0f572ba7 DH |
536 | } |
537 | ||
b7742c6b AW |
538 | SCM |
539 | scm_apply_1 (SCM proc, SCM arg1, SCM args) | |
0f572ba7 | 540 | { |
b7742c6b | 541 | return scm_apply (proc, scm_cons (arg1, args), SCM_EOL); |
8ae95199 DH |
542 | } |
543 | ||
b7742c6b AW |
544 | SCM |
545 | scm_apply_2 (SCM proc, SCM arg1, SCM arg2, SCM args) | |
0f2d19dd | 546 | { |
b7742c6b | 547 | return scm_apply (proc, scm_cons2 (arg1, arg2, args), SCM_EOL); |
0f2d19dd JB |
548 | } |
549 | ||
b7742c6b AW |
550 | SCM |
551 | scm_apply_3 (SCM proc, SCM arg1, SCM arg2, SCM arg3, SCM args) | |
212e58ed | 552 | { |
b7742c6b AW |
553 | return scm_apply (proc, scm_cons (arg1, scm_cons2 (arg2, arg3, args)), |
554 | SCM_EOL); | |
212e58ed DH |
555 | } |
556 | ||
b7742c6b | 557 | /* This code processes the arguments to apply: |
8ea46249 | 558 | |
b7742c6b | 559 | (apply PROC ARG1 ... ARGS) |
302c12b4 | 560 | |
b7742c6b AW |
561 | Given a list (ARG1 ... ARGS), this function conses the ARG1 |
562 | ... arguments onto the front of ARGS, and returns the resulting | |
563 | list. Note that ARGS is a list; thus, the argument to this | |
564 | function is a list whose last element is a list. | |
302c12b4 | 565 | |
b7742c6b AW |
566 | Apply calls this function, and applies PROC to the elements of the |
567 | result. apply:nconc2last takes care of building the list of | |
568 | arguments, given (ARG1 ... ARGS). | |
a954ce1d | 569 | |
b7742c6b AW |
570 | Rather than do new consing, apply:nconc2last destroys its argument. |
571 | On that topic, this code came into my care with the following | |
572 | beautifully cryptic comment on that topic: "This will only screw | |
573 | you if you do (scm_apply scm_apply '( ... ))" If you know what | |
574 | they're referring to, send me a patch to this comment. */ | |
0f2d19dd | 575 | |
b7742c6b AW |
576 | SCM_DEFINE (scm_nconc2last, "apply:nconc2last", 1, 0, 0, |
577 | (SCM lst), | |
578 | "Given a list (@var{arg1} @dots{} @var{args}), this function\n" | |
579 | "conses the @var{arg1} @dots{} arguments onto the front of\n" | |
580 | "@var{args}, and returns the resulting list. Note that\n" | |
581 | "@var{args} is a list; thus, the argument to this function is\n" | |
582 | "a list whose last element is a list.\n" | |
583 | "Note: Rather than do new consing, @code{apply:nconc2last}\n" | |
584 | "destroys its argument, so use with care.") | |
585 | #define FUNC_NAME s_scm_nconc2last | |
212e58ed | 586 | { |
b7742c6b AW |
587 | SCM *lloc; |
588 | SCM_VALIDATE_NONEMPTYLIST (1, lst); | |
589 | lloc = &lst; | |
b6b84131 | 590 | while (!scm_is_null (SCM_CDR (*lloc))) |
b7742c6b AW |
591 | lloc = SCM_CDRLOC (*lloc); |
592 | SCM_ASSERT (scm_ilength (SCM_CAR (*lloc)) >= 0, lst, SCM_ARG1, FUNC_NAME); | |
593 | *lloc = SCM_CAR (*lloc); | |
594 | return lst; | |
212e58ed | 595 | } |
b7742c6b | 596 | #undef FUNC_NAME |
212e58ed | 597 | |
b8229a3b MS |
598 | |
599 | ||
b7742c6b | 600 | /* Typechecking for multi-argument MAP and FOR-EACH. |
0f2d19dd | 601 | |
b7742c6b AW |
602 | Verify that each element of the vector ARGV, except for the first, |
603 | is a proper list whose length is LEN. Attribute errors to WHO, | |
604 | and claim that the i'th element of ARGV is WHO's i+2'th argument. */ | |
605 | static inline void | |
606 | check_map_args (SCM argv, | |
607 | long len, | |
608 | SCM gf, | |
609 | SCM proc, | |
610 | SCM args, | |
611 | const char *who) | |
212e58ed | 612 | { |
b7742c6b | 613 | long i; |
0f2d19dd | 614 | |
b7742c6b | 615 | for (i = SCM_SIMPLE_VECTOR_LENGTH (argv) - 1; i >= 1; i--) |
9fbee57e | 616 | { |
b7742c6b AW |
617 | SCM elt = SCM_SIMPLE_VECTOR_REF (argv, i); |
618 | long elt_len = scm_ilength (elt); | |
5cb22e96 | 619 | |
b7742c6b AW |
620 | if (elt_len < 0) |
621 | { | |
622 | if (gf) | |
623 | scm_apply_generic (gf, scm_cons (proc, args)); | |
624 | else | |
625 | scm_wrong_type_arg (who, i + 2, elt); | |
626 | } | |
1cc91f1b | 627 | |
b7742c6b AW |
628 | if (elt_len != len) |
629 | scm_out_of_range_pos (who, elt, scm_from_long (i + 2)); | |
0f2d19dd | 630 | } |
0f2d19dd | 631 | } |
6dbd0af5 | 632 | |
212e58ed | 633 | |
b7742c6b | 634 | SCM_GPROC (s_map, "map", 2, 0, 1, scm_map, g_map); |
212e58ed | 635 | |
b7742c6b AW |
636 | /* Note: Currently, scm_map applies PROC to the argument list(s) |
637 | sequentially, starting with the first element(s). This is used in | |
638 | evalext.c where the Scheme procedure `map-in-order', which guarantees | |
639 | sequential behaviour, is implemented using scm_map. If the | |
640 | behaviour changes, we need to update `map-in-order'. | |
641 | */ | |
0f2d19dd | 642 | |
b7742c6b AW |
643 | SCM |
644 | scm_map (SCM proc, SCM arg1, SCM args) | |
645 | #define FUNC_NAME s_map | |
0f2d19dd | 646 | { |
b7742c6b AW |
647 | long i, len; |
648 | SCM res = SCM_EOL; | |
649 | SCM *pres = &res; | |
0f2d19dd | 650 | |
b7742c6b AW |
651 | len = scm_ilength (arg1); |
652 | SCM_GASSERTn (len >= 0, | |
653 | g_map, scm_cons2 (proc, arg1, args), SCM_ARG2, s_map); | |
654 | SCM_VALIDATE_REST_ARGUMENT (args); | |
655 | if (scm_is_null (args)) | |
0f2d19dd | 656 | { |
b7742c6b AW |
657 | SCM_GASSERT2 (scm_is_true (scm_procedure_p (proc)), g_map, proc, arg1, SCM_ARG1, s_map); |
658 | while (SCM_NIMP (arg1)) | |
659 | { | |
660 | *pres = scm_list_1 (scm_call_1 (proc, SCM_CAR (arg1))); | |
661 | pres = SCM_CDRLOC (*pres); | |
662 | arg1 = SCM_CDR (arg1); | |
663 | } | |
664 | return res; | |
0f2d19dd | 665 | } |
b7742c6b AW |
666 | if (scm_is_null (SCM_CDR (args))) |
667 | { | |
668 | SCM arg2 = SCM_CAR (args); | |
669 | int len2 = scm_ilength (arg2); | |
670 | SCM_GASSERTn (scm_is_true (scm_procedure_p (proc)), g_map, | |
671 | scm_cons2 (proc, arg1, args), SCM_ARG1, s_map); | |
672 | SCM_GASSERTn (len2 >= 0, | |
673 | g_map, scm_cons2 (proc, arg1, args), SCM_ARG3, s_map); | |
674 | if (len2 != len) | |
675 | SCM_OUT_OF_RANGE (3, arg2); | |
676 | while (SCM_NIMP (arg1)) | |
677 | { | |
678 | *pres = scm_list_1 (scm_call_2 (proc, SCM_CAR (arg1), SCM_CAR (arg2))); | |
679 | pres = SCM_CDRLOC (*pres); | |
680 | arg1 = SCM_CDR (arg1); | |
681 | arg2 = SCM_CDR (arg2); | |
682 | } | |
683 | return res; | |
684 | } | |
685 | arg1 = scm_cons (arg1, args); | |
686 | args = scm_vector (arg1); | |
687 | check_map_args (args, len, g_map, proc, arg1, s_map); | |
688 | while (1) | |
d6754c23 | 689 | { |
b7742c6b AW |
690 | arg1 = SCM_EOL; |
691 | for (i = SCM_SIMPLE_VECTOR_LENGTH (args) - 1; i >= 0; i--) | |
692 | { | |
693 | SCM elt = SCM_SIMPLE_VECTOR_REF (args, i); | |
694 | if (SCM_IMP (elt)) | |
695 | return res; | |
696 | arg1 = scm_cons (SCM_CAR (elt), arg1); | |
697 | SCM_SIMPLE_VECTOR_SET (args, i, SCM_CDR (elt)); | |
698 | } | |
699 | *pres = scm_list_1 (scm_apply (proc, arg1, SCM_EOL)); | |
700 | pres = SCM_CDRLOC (*pres); | |
d6754c23 | 701 | } |
0f2d19dd | 702 | } |
b7742c6b | 703 | #undef FUNC_NAME |
0f2d19dd | 704 | |
302c12b4 | 705 | |
b7742c6b | 706 | SCM_GPROC (s_for_each, "for-each", 2, 0, 1, scm_for_each, g_for_each); |
d6754c23 | 707 | |
b7742c6b AW |
708 | SCM |
709 | scm_for_each (SCM proc, SCM arg1, SCM args) | |
710 | #define FUNC_NAME s_for_each | |
0f2d19dd | 711 | { |
b7742c6b AW |
712 | long i, len; |
713 | len = scm_ilength (arg1); | |
714 | SCM_GASSERTn (len >= 0, g_for_each, scm_cons2 (proc, arg1, args), | |
715 | SCM_ARG2, s_for_each); | |
716 | SCM_VALIDATE_REST_ARGUMENT (args); | |
717 | if (scm_is_null (args)) | |
26d5b9b4 | 718 | { |
b7742c6b AW |
719 | SCM_GASSERT2 (scm_is_true (scm_procedure_p (proc)), g_for_each, |
720 | proc, arg1, SCM_ARG1, s_for_each); | |
721 | while (SCM_NIMP (arg1)) | |
722 | { | |
723 | scm_call_1 (proc, SCM_CAR (arg1)); | |
724 | arg1 = SCM_CDR (arg1); | |
725 | } | |
726 | return SCM_UNSPECIFIED; | |
26d5b9b4 | 727 | } |
b7742c6b | 728 | if (scm_is_null (SCM_CDR (args))) |
26d5b9b4 | 729 | { |
b7742c6b AW |
730 | SCM arg2 = SCM_CAR (args); |
731 | int len2 = scm_ilength (arg2); | |
732 | SCM_GASSERTn (scm_is_true (scm_procedure_p (proc)), g_for_each, | |
733 | scm_cons2 (proc, arg1, args), SCM_ARG1, s_for_each); | |
734 | SCM_GASSERTn (len2 >= 0, g_for_each, | |
735 | scm_cons2 (proc, arg1, args), SCM_ARG3, s_for_each); | |
736 | if (len2 != len) | |
737 | SCM_OUT_OF_RANGE (3, arg2); | |
738 | while (SCM_NIMP (arg1)) | |
739 | { | |
740 | scm_call_2 (proc, SCM_CAR (arg1), SCM_CAR (arg2)); | |
741 | arg1 = SCM_CDR (arg1); | |
742 | arg2 = SCM_CDR (arg2); | |
743 | } | |
744 | return SCM_UNSPECIFIED; | |
26d5b9b4 | 745 | } |
b7742c6b AW |
746 | arg1 = scm_cons (arg1, args); |
747 | args = scm_vector (arg1); | |
748 | check_map_args (args, len, g_for_each, proc, arg1, s_for_each); | |
749 | while (1) | |
302c12b4 | 750 | { |
b7742c6b AW |
751 | arg1 = SCM_EOL; |
752 | for (i = SCM_SIMPLE_VECTOR_LENGTH (args) - 1; i >= 0; i--) | |
71560395 | 753 | { |
b7742c6b AW |
754 | SCM elt = SCM_SIMPLE_VECTOR_REF (args, i); |
755 | if (SCM_IMP (elt)) | |
756 | return SCM_UNSPECIFIED; | |
757 | arg1 = scm_cons (SCM_CAR (elt), arg1); | |
758 | SCM_SIMPLE_VECTOR_SET (args, i, SCM_CDR (elt)); | |
759 | } | |
760 | scm_apply (proc, arg1, SCM_EOL); | |
761 | } | |
762 | } | |
763 | #undef FUNC_NAME | |
71560395 | 764 | |
71560395 | 765 | |
5f161164 AW |
766 | static SCM |
767 | scm_c_primitive_eval (SCM exp) | |
b7742c6b | 768 | { |
a310a1d1 | 769 | if (!SCM_EXPANDED_P (exp)) |
4f692ace | 770 | exp = scm_call_1 (scm_current_module_transformer (), exp); |
a310a1d1 | 771 | return eval (scm_memoize_expression (exp), SCM_EOL); |
b7742c6b | 772 | } |
5f161164 AW |
773 | |
774 | static SCM var_primitive_eval; | |
775 | SCM | |
776 | scm_primitive_eval (SCM exp) | |
777 | { | |
778 | return scm_c_vm_run (scm_the_vm (), scm_variable_ref (var_primitive_eval), | |
779 | &exp, 1); | |
780 | } | |
71560395 | 781 | |
b7742c6b AW |
782 | |
783 | /* Eval does not take the second arg optionally. This is intentional | |
784 | * in order to be R5RS compatible, and to prepare for the new module | |
785 | * system, where we would like to make the choice of evaluation | |
786 | * environment explicit. */ | |
787 | ||
788 | SCM_DEFINE (scm_eval, "eval", 2, 0, 0, | |
789 | (SCM exp, SCM module_or_state), | |
790 | "Evaluate @var{exp}, a list representing a Scheme expression,\n" | |
791 | "in the top-level environment specified by\n" | |
792 | "@var{module_or_state}.\n" | |
793 | "While @var{exp} is evaluated (using @code{primitive-eval}),\n" | |
794 | "@var{module_or_state} is made the current module when\n" | |
795 | "it is a module, or the current dynamic state when it is\n" | |
796 | "a dynamic state." | |
797 | "Example: (eval '(+ 1 2) (interaction-environment))") | |
798 | #define FUNC_NAME s_scm_eval | |
799 | { | |
800 | SCM res; | |
801 | ||
802 | scm_dynwind_begin (SCM_F_DYNWIND_REWINDABLE); | |
803 | if (scm_is_dynamic_state (module_or_state)) | |
804 | scm_dynwind_current_dynamic_state (module_or_state); | |
805 | else if (scm_module_system_booted_p) | |
806 | { | |
807 | SCM_VALIDATE_MODULE (2, module_or_state); | |
808 | scm_dynwind_current_module (module_or_state); | |
71560395 | 809 | } |
b7742c6b | 810 | /* otherwise if the module system isn't booted, ignore the module arg */ |
71560395 | 811 | |
b7742c6b AW |
812 | res = scm_primitive_eval (exp); |
813 | ||
814 | scm_dynwind_end (); | |
815 | return res; | |
816 | } | |
817 | #undef FUNC_NAME | |
71560395 AW |
818 | |
819 | ||
b7742c6b | 820 | static SCM f_apply; |
71560395 AW |
821 | |
822 | /* Apply a function to a list of arguments. | |
823 | ||
824 | This function is exported to the Scheme level as taking two | |
825 | required arguments and a tail argument, as if it were: | |
826 | (lambda (proc arg1 . args) ...) | |
827 | Thus, if you just have a list of arguments to pass to a procedure, | |
828 | pass the list as ARG1, and '() for ARGS. If you have some fixed | |
829 | args, pass the first as ARG1, then cons any remaining fixed args | |
830 | onto the front of your argument list, and pass that as ARGS. */ | |
831 | ||
832 | SCM | |
833 | scm_apply (SCM proc, SCM arg1, SCM args) | |
834 | { | |
b7742c6b | 835 | /* Fix things up so that args contains all args. */ |
71560395 | 836 | if (scm_is_null (args)) |
b7742c6b | 837 | args = arg1; |
71560395 | 838 | else |
b7742c6b | 839 | args = scm_cons_star (arg1, args); |
71560395 | 840 | |
ea9f4f4b | 841 | return scm_call_with_vm (scm_the_vm (), proc, args); |
b7742c6b | 842 | } |
434f2f7a | 843 | |
7572ee52 AW |
844 | static void |
845 | prepare_boot_closure_env_for_apply (SCM proc, SCM args, | |
846 | SCM *out_body, SCM *out_env) | |
314b8716 | 847 | { |
8f9c5b58 AW |
848 | int nreq = BOOT_CLOSURE_NUM_REQUIRED_ARGS (proc); |
849 | SCM env = BOOT_CLOSURE_ENV (proc); | |
dc3e203e | 850 | |
8f9c5b58 AW |
851 | if (BOOT_CLOSURE_IS_FIXED (proc) |
852 | || (BOOT_CLOSURE_IS_REST (proc) | |
853 | && !BOOT_CLOSURE_HAS_REST_ARGS (proc))) | |
854 | { | |
855 | if (SCM_UNLIKELY (scm_ilength (args) != nreq)) | |
856 | scm_wrong_num_args (proc); | |
857 | for (; scm_is_pair (args); args = CDR (args)) | |
858 | env = scm_cons (CAR (args), env); | |
7572ee52 AW |
859 | *out_body = BOOT_CLOSURE_BODY (proc); |
860 | *out_env = env; | |
8f9c5b58 AW |
861 | } |
862 | else if (BOOT_CLOSURE_IS_REST (proc)) | |
314b8716 AW |
863 | { |
864 | if (SCM_UNLIKELY (scm_ilength (args) < nreq)) | |
8f9c5b58 | 865 | scm_wrong_num_args (proc); |
314b8716 | 866 | for (; nreq; nreq--, args = CDR (args)) |
8f9c5b58 AW |
867 | env = scm_cons (CAR (args), env); |
868 | env = scm_cons (args, env); | |
7572ee52 AW |
869 | *out_body = BOOT_CLOSURE_BODY (proc); |
870 | *out_env = env; | |
314b8716 AW |
871 | } |
872 | else | |
d8a071fc AW |
873 | { |
874 | int i, argc, nreq, nopt; | |
875 | SCM body, rest, kw, inits, alt; | |
dc3e203e | 876 | SCM mx = BOOT_CLOSURE_CODE (proc); |
d8a071fc | 877 | |
7572ee52 | 878 | loop: |
dc3e203e | 879 | BOOT_CLOSURE_PARSE_FULL (mx, body, nargs, rest, nopt, kw, inits, alt); |
d8a071fc AW |
880 | |
881 | argc = scm_ilength (args); | |
882 | if (argc < nreq) | |
883 | { | |
884 | if (scm_is_true (alt)) | |
7572ee52 | 885 | { |
dc3e203e | 886 | mx = alt; |
7572ee52 AW |
887 | goto loop; |
888 | } | |
d8a071fc AW |
889 | else |
890 | scm_wrong_num_args (proc); | |
891 | } | |
892 | if (scm_is_false (kw) && argc > nreq + nopt && scm_is_false (rest)) | |
893 | { | |
894 | if (scm_is_true (alt)) | |
7572ee52 | 895 | { |
dc3e203e | 896 | mx = alt; |
7572ee52 AW |
897 | goto loop; |
898 | } | |
d8a071fc AW |
899 | else |
900 | scm_wrong_num_args (proc); | |
901 | } | |
902 | ||
903 | for (i = 0; i < nreq; i++, args = CDR (args)) | |
904 | env = scm_cons (CAR (args), env); | |
905 | ||
906 | if (scm_is_false (kw)) | |
907 | { | |
908 | /* Optional args (possibly), but no keyword args. */ | |
909 | for (; i < argc && i < nreq + nopt; | |
910 | i++, args = CDR (args)) | |
911 | { | |
912 | env = scm_cons (CAR (args), env); | |
913 | inits = CDR (inits); | |
914 | } | |
915 | ||
916 | for (; i < nreq + nopt; i++, inits = CDR (inits)) | |
f3a9a51d | 917 | env = scm_cons (EVAL1 (CAR (inits), env), env); |
d8a071fc AW |
918 | |
919 | if (scm_is_true (rest)) | |
920 | env = scm_cons (args, env); | |
921 | } | |
922 | else | |
923 | { | |
924 | SCM aok; | |
925 | ||
926 | aok = CAR (kw); | |
927 | kw = CDR (kw); | |
928 | ||
929 | /* Keyword args. As before, but stop at the first keyword. */ | |
930 | for (; i < argc && i < nreq + nopt && !scm_is_keyword (CAR (args)); | |
931 | i++, args = CDR (args), inits = CDR (inits)) | |
932 | env = scm_cons (CAR (args), env); | |
933 | ||
934 | for (; i < nreq + nopt; i++, inits = CDR (inits)) | |
f3a9a51d | 935 | env = scm_cons (EVAL1 (CAR (inits), env), env); |
d8a071fc AW |
936 | |
937 | if (scm_is_true (rest)) | |
938 | { | |
939 | env = scm_cons (args, env); | |
940 | i++; | |
941 | } | |
942 | ||
943 | /* Now fill in env with unbound values, limn the rest of the args for | |
944 | keywords, and fill in unbound values with their inits. */ | |
945 | { | |
946 | int imax = i - 1; | |
947 | int kw_start_idx = i; | |
948 | SCM walk, k, v; | |
949 | for (walk = kw; scm_is_pair (walk); walk = CDR (walk)) | |
950 | if (SCM_I_INUM (CDAR (walk)) > imax) | |
951 | imax = SCM_I_INUM (CDAR (walk)); | |
952 | for (; i <= imax; i++) | |
953 | env = scm_cons (SCM_UNDEFINED, env); | |
954 | ||
955 | if (scm_is_pair (args) && scm_is_pair (CDR (args))) | |
956 | for (; scm_is_pair (args) && scm_is_pair (CDR (args)); | |
957 | args = CDR (args)) | |
958 | { | |
959 | k = CAR (args); v = CADR (args); | |
960 | if (!scm_is_keyword (k)) | |
961 | { | |
962 | if (scm_is_true (rest)) | |
963 | continue; | |
964 | else | |
965 | break; | |
966 | } | |
967 | for (walk = kw; scm_is_pair (walk); walk = CDR (walk)) | |
968 | if (scm_is_eq (k, CAAR (walk))) | |
969 | { | |
970 | /* Well... ok, list-set! isn't the nicest interface, but | |
971 | hey. */ | |
972 | int iset = imax - SCM_I_INUM (CDAR (walk)); | |
973 | scm_list_set_x (env, SCM_I_MAKINUM (iset), v); | |
974 | args = CDR (args); | |
975 | break; | |
976 | } | |
977 | if (scm_is_null (walk) && scm_is_false (aok)) | |
978 | error_unrecognized_keyword (proc); | |
979 | } | |
980 | if (scm_is_pair (args) && scm_is_false (rest)) | |
981 | error_invalid_keyword (proc); | |
982 | ||
983 | /* Now fill in unbound values, evaluating init expressions in their | |
984 | appropriate environment. */ | |
985 | for (i = imax - kw_start_idx; scm_is_pair (inits); i--, inits = CDR (inits)) | |
986 | { | |
987 | SCM tail = scm_list_tail (env, SCM_I_MAKINUM (i)); | |
988 | if (SCM_UNBNDP (CAR (tail))) | |
f3a9a51d | 989 | SCM_SETCAR (tail, EVAL1 (CAR (inits), CDR (tail))); |
d8a071fc AW |
990 | } |
991 | } | |
992 | } | |
8f9c5b58 | 993 | |
dc3e203e | 994 | *out_body = body; |
7572ee52 AW |
995 | *out_env = env; |
996 | } | |
8f9c5b58 AW |
997 | } |
998 | ||
7572ee52 | 999 | static void |
8f9c5b58 | 1000 | prepare_boot_closure_env_for_eval (SCM proc, unsigned int argc, |
7572ee52 | 1001 | SCM exps, SCM *out_body, SCM *inout_env) |
8f9c5b58 AW |
1002 | { |
1003 | int nreq = BOOT_CLOSURE_NUM_REQUIRED_ARGS (proc); | |
1004 | SCM new_env = BOOT_CLOSURE_ENV (proc); | |
1005 | if (BOOT_CLOSURE_IS_FIXED (proc) | |
1006 | || (BOOT_CLOSURE_IS_REST (proc) | |
1007 | && !BOOT_CLOSURE_HAS_REST_ARGS (proc))) | |
314b8716 | 1008 | { |
8f9c5b58 | 1009 | for (; scm_is_pair (exps); exps = CDR (exps), nreq--) |
f3a9a51d AW |
1010 | new_env = scm_cons (EVAL1 (CAR (exps), *inout_env), |
1011 | new_env); | |
8f9c5b58 AW |
1012 | if (SCM_UNLIKELY (nreq != 0)) |
1013 | scm_wrong_num_args (proc); | |
7572ee52 AW |
1014 | *out_body = BOOT_CLOSURE_BODY (proc); |
1015 | *inout_env = new_env; | |
314b8716 | 1016 | } |
8f9c5b58 AW |
1017 | else if (BOOT_CLOSURE_IS_REST (proc)) |
1018 | { | |
1019 | if (SCM_UNLIKELY (argc < nreq)) | |
1020 | scm_wrong_num_args (proc); | |
1021 | for (; nreq; nreq--, exps = CDR (exps)) | |
f3a9a51d AW |
1022 | new_env = scm_cons (EVAL1 (CAR (exps), *inout_env), |
1023 | new_env); | |
8f9c5b58 AW |
1024 | { |
1025 | SCM rest = SCM_EOL; | |
1026 | for (; scm_is_pair (exps); exps = CDR (exps)) | |
f3a9a51d | 1027 | rest = scm_cons (EVAL1 (CAR (exps), *inout_env), rest); |
8f9c5b58 AW |
1028 | new_env = scm_cons (scm_reverse (rest), |
1029 | new_env); | |
1030 | } | |
7572ee52 AW |
1031 | *out_body = BOOT_CLOSURE_BODY (proc); |
1032 | *inout_env = new_env; | |
8f9c5b58 AW |
1033 | } |
1034 | else | |
d8a071fc AW |
1035 | { |
1036 | SCM args = SCM_EOL; | |
1037 | for (; scm_is_pair (exps); exps = CDR (exps)) | |
f3a9a51d | 1038 | args = scm_cons (EVAL1 (CAR (exps), *inout_env), args); |
7572ee52 AW |
1039 | args = scm_reverse_x (args, SCM_UNDEFINED); |
1040 | prepare_boot_closure_env_for_apply (proc, args, out_body, inout_env); | |
d8a071fc | 1041 | } |
8f9c5b58 AW |
1042 | } |
1043 | ||
1044 | static SCM | |
1045 | boot_closure_apply (SCM closure, SCM args) | |
1046 | { | |
7572ee52 AW |
1047 | SCM body, env; |
1048 | prepare_boot_closure_env_for_apply (closure, args, &body, &env); | |
1049 | return eval (body, env); | |
314b8716 AW |
1050 | } |
1051 | ||
1052 | static int | |
1053 | boot_closure_print (SCM closure, SCM port, scm_print_state *pstate) | |
1054 | { | |
1055 | SCM args; | |
1056 | scm_puts ("#<boot-closure ", port); | |
3d27ef4b | 1057 | scm_uintprint ((scm_t_bits)SCM2PTR (closure), 16, port); |
314b8716 AW |
1058 | scm_putc (' ', port); |
1059 | args = scm_make_list (scm_from_int (BOOT_CLOSURE_NUM_REQUIRED_ARGS (closure)), | |
4a655e50 | 1060 | scm_from_latin1_symbol ("_")); |
8f9c5b58 | 1061 | if (!BOOT_CLOSURE_IS_FIXED (closure) && BOOT_CLOSURE_HAS_REST_ARGS (closure)) |
4a655e50 | 1062 | args = scm_cons_star (scm_from_latin1_symbol ("_"), args); |
7572ee52 | 1063 | /* FIXME: optionals and rests */ |
314b8716 AW |
1064 | scm_display (args, port); |
1065 | scm_putc ('>', port); | |
1066 | return 1; | |
1067 | } | |
1068 | ||
0f2d19dd JB |
1069 | void |
1070 | scm_init_eval () | |
0f2d19dd | 1071 | { |
5f161164 AW |
1072 | SCM primitive_eval; |
1073 | ||
df9ca8d8 | 1074 | f_apply = scm_c_define_gsubr ("apply", 2, 0, 1, scm_apply); |
86d31dfe | 1075 | |
314b8716 AW |
1076 | scm_tc16_boot_closure = scm_make_smob_type ("boot-closure", 0); |
1077 | scm_set_smob_apply (scm_tc16_boot_closure, boot_closure_apply, 0, 0, 1); | |
1078 | scm_set_smob_print (scm_tc16_boot_closure, boot_closure_print); | |
1079 | ||
5f161164 AW |
1080 | primitive_eval = scm_c_make_gsubr ("primitive-eval", 1, 0, 0, |
1081 | scm_c_primitive_eval); | |
1082 | var_primitive_eval = scm_define (SCM_SUBR_NAME (primitive_eval), | |
1083 | primitive_eval); | |
1084 | ||
a0599745 | 1085 | #include "libguile/eval.x" |
0f2d19dd | 1086 | } |
0f2d19dd | 1087 | |
89e00824 ML |
1088 | /* |
1089 | Local Variables: | |
1090 | c-file-style: "gnu" | |
1091 | End: | |
1092 | */ | |
62560650 | 1093 |