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" |
21628685 DH |
39 | #include "libguile/feature.h" |
40 | #include "libguile/fluids.h" | |
21628685 DH |
41 | #include "libguile/goops.h" |
42 | #include "libguile/hash.h" | |
43 | #include "libguile/hashtab.h" | |
44 | #include "libguile/lang.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) | |
109 | #define BOOT_CLOSURE_NUM_REQUIRED_ARGS(x) SCM_I_INUM (CAR (BOOT_CLOSURE_CODE (x))) | |
110 | #define BOOT_CLOSURE_HAS_REST_ARGS(x) scm_is_true (CADR (BOOT_CLOSURE_CODE (x))) | |
111 | #define BOOT_CLOSURE_BODY(x) CDDR (BOOT_CLOSURE_CODE (x)) | |
112 | ||
113 | ||
114 | ||
b7742c6b AW |
115 | #if 0 |
116 | #define CAR(x) SCM_CAR(x) | |
117 | #define CDR(x) SCM_CDR(x) | |
118 | #define CAAR(x) SCM_CAAR(x) | |
119 | #define CADR(x) SCM_CADR(x) | |
120 | #define CDAR(x) SCM_CDAR(x) | |
121 | #define CDDR(x) SCM_CDDR(x) | |
122 | #define CADDR(x) SCM_CADDR(x) | |
123 | #define CDDDR(x) SCM_CDDDR(x) | |
124 | #else | |
125 | #define CAR(x) scm_car(x) | |
126 | #define CDR(x) scm_cdr(x) | |
127 | #define CAAR(x) scm_caar(x) | |
128 | #define CADR(x) scm_cadr(x) | |
129 | #define CDAR(x) scm_cdar(x) | |
130 | #define CDDR(x) scm_cddr(x) | |
131 | #define CADDR(x) scm_caddr(x) | |
132 | #define CDDDR(x) scm_cdddr(x) | |
133 | #endif | |
e6729603 DH |
134 | |
135 | ||
b7742c6b | 136 | SCM_SYMBOL (scm_unbound_variable_key, "unbound-variable"); |
e6729603 | 137 | |
b7742c6b | 138 | static void error_used_before_defined (void) |
d0624e39 | 139 | { |
b7742c6b AW |
140 | scm_error (scm_unbound_variable_key, NULL, |
141 | "Variable used before given a value", SCM_EOL, SCM_BOOL_F); | |
d0624e39 | 142 | } |
d0624e39 | 143 | |
b7742c6b AW |
144 | int |
145 | scm_badargsp (SCM formals, SCM args) | |
7e6e6b37 | 146 | { |
b7742c6b AW |
147 | while (!scm_is_null (formals)) |
148 | { | |
149 | if (!scm_is_pair (formals)) | |
150 | return 0; | |
151 | if (scm_is_null (args)) | |
152 | return 1; | |
153 | formals = CDR (formals); | |
154 | args = CDR (args); | |
155 | } | |
156 | return !scm_is_null (args) ? 1 : 0; | |
7e6e6b37 DH |
157 | } |
158 | ||
b7742c6b | 159 | /* the environment: |
3149a5b6 | 160 | (VAL ... . MOD) |
b7742c6b AW |
161 | If MOD is #f, it means the environment was captured before modules were |
162 | booted. | |
163 | If MOD is the literal value '(), we are evaluating at the top level, and so | |
164 | should track changes to the current module. You have to be careful in this | |
165 | case, because further lexical contours should capture the current module. | |
166 | */ | |
167 | #define CAPTURE_ENV(env) \ | |
168 | ((env == SCM_EOL) ? scm_current_module () : \ | |
169 | ((env == SCM_BOOL_F) ? scm_the_root_module () : env)) | |
6f81708a DH |
170 | |
171 | static SCM | |
b7742c6b | 172 | eval (SCM x, SCM env) |
6f81708a | 173 | { |
b7742c6b AW |
174 | SCM mx; |
175 | SCM proc = SCM_UNDEFINED, args = SCM_EOL; | |
6f81708a | 176 | |
b7742c6b AW |
177 | loop: |
178 | SCM_TICK; | |
179 | if (!SCM_MEMOIZED_P (x)) | |
180 | abort (); | |
181 | ||
182 | mx = SCM_MEMOIZED_ARGS (x); | |
183 | switch (SCM_MEMOIZED_TAG (x)) | |
184 | { | |
185 | case SCM_M_BEGIN: | |
186 | for (; !scm_is_null (CDR (mx)); mx = CDR (mx)) | |
187 | eval (CAR (mx), env); | |
188 | x = CAR (mx); | |
189 | goto loop; | |
190 | ||
191 | case SCM_M_IF: | |
192 | if (scm_is_true (eval (CAR (mx), env))) | |
193 | x = CADR (mx); | |
6f81708a | 194 | else |
b7742c6b AW |
195 | x = CDDR (mx); |
196 | goto loop; | |
5fb64383 | 197 | |
b7742c6b AW |
198 | case SCM_M_LET: |
199 | { | |
200 | SCM inits = CAR (mx); | |
201 | SCM new_env = CAPTURE_ENV (env); | |
202 | for (; scm_is_pair (inits); inits = CDR (inits)) | |
203 | new_env = scm_cons (eval (CAR (inits), env), new_env); | |
204 | env = new_env; | |
205 | x = CDR (mx); | |
206 | goto loop; | |
207 | } | |
208 | ||
209 | case SCM_M_LAMBDA: | |
314b8716 | 210 | RETURN_BOOT_CLOSURE (mx, CAPTURE_ENV (env)); |
5fb64383 | 211 | |
b7742c6b AW |
212 | case SCM_M_QUOTE: |
213 | return mx; | |
0f2d19dd | 214 | |
b7742c6b AW |
215 | case SCM_M_DEFINE: |
216 | scm_define (CAR (mx), eval (CDR (mx), env)); | |
217 | return SCM_UNSPECIFIED; | |
212e58ed | 218 | |
d69531e2 AW |
219 | case SCM_M_DYNWIND: |
220 | { | |
221 | SCM in, out, res, old_winds; | |
222 | in = eval (CAR (mx), env); | |
223 | out = eval (CDDR (mx), env); | |
224 | scm_call_0 (in); | |
225 | old_winds = scm_i_dynwinds (); | |
226 | scm_i_set_dynwinds (scm_acons (in, out, old_winds)); | |
227 | res = eval (CADR (mx), env); | |
228 | scm_i_set_dynwinds (old_winds); | |
229 | scm_call_0 (out); | |
230 | return res; | |
231 | } | |
232 | ||
bb0229b5 AW |
233 | case SCM_M_WITH_FLUIDS: |
234 | { | |
235 | long i, len; | |
236 | SCM *fluidv, *valuesv, walk, wf, res; | |
237 | len = scm_ilength (CAR (mx)); | |
238 | fluidv = alloca (sizeof (SCM)*len); | |
239 | for (i = 0, walk = CAR (mx); i < len; i++, walk = CDR (walk)) | |
240 | fluidv[i] = eval (CAR (walk), env); | |
241 | valuesv = alloca (sizeof (SCM)*len); | |
242 | for (i = 0, walk = CADR (mx); i < len; i++, walk = CDR (walk)) | |
243 | valuesv[i] = eval (CAR (walk), env); | |
244 | ||
245 | wf = scm_i_make_with_fluids (len, fluidv, valuesv); | |
246 | scm_i_swap_with_fluids (wf, SCM_I_CURRENT_THREAD->dynamic_state); | |
247 | scm_i_set_dynwinds (scm_cons (wf, scm_i_dynwinds ())); | |
248 | res = eval (CDDR (mx), env); | |
249 | scm_i_swap_with_fluids (wf, SCM_I_CURRENT_THREAD->dynamic_state); | |
250 | scm_i_set_dynwinds (CDR (scm_i_dynwinds ())); | |
251 | ||
252 | return res; | |
253 | } | |
254 | ||
b7742c6b AW |
255 | case SCM_M_APPLY: |
256 | /* Evaluate the procedure to be applied. */ | |
257 | proc = eval (CAR (mx), env); | |
258 | /* Evaluate the argument holding the list of arguments */ | |
259 | args = eval (CADR (mx), env); | |
260 | ||
261 | apply_proc: | |
262 | /* Go here to tail-apply a procedure. PROC is the procedure and | |
263 | * ARGS is the list of arguments. */ | |
314b8716 | 264 | if (BOOT_CLOSURE_P (proc)) |
b7742c6b | 265 | { |
314b8716 AW |
266 | int nreq = BOOT_CLOSURE_NUM_REQUIRED_ARGS (proc); |
267 | SCM new_env = BOOT_CLOSURE_ENV (proc); | |
268 | if (BOOT_CLOSURE_HAS_REST_ARGS (proc)) | |
b7742c6b AW |
269 | { |
270 | if (SCM_UNLIKELY (scm_ilength (args) < nreq)) | |
271 | scm_wrong_num_args (proc); | |
272 | for (; nreq; nreq--, args = CDR (args)) | |
273 | new_env = scm_cons (CAR (args), new_env); | |
274 | new_env = scm_cons (args, new_env); | |
275 | } | |
276 | else | |
277 | { | |
278 | if (SCM_UNLIKELY (scm_ilength (args) != nreq)) | |
279 | scm_wrong_num_args (proc); | |
280 | for (; scm_is_pair (args); args = CDR (args)) | |
281 | new_env = scm_cons (CAR (args), new_env); | |
282 | } | |
314b8716 | 283 | x = BOOT_CLOSURE_BODY (proc); |
b7742c6b AW |
284 | env = new_env; |
285 | goto loop; | |
286 | } | |
287 | else | |
67e2d80a | 288 | return scm_vm_apply (scm_the_vm (), proc, args); |
212e58ed | 289 | |
b7742c6b AW |
290 | case SCM_M_CALL: |
291 | /* Evaluate the procedure to be applied. */ | |
292 | proc = eval (CAR (mx), env); | |
9331f91c AW |
293 | /* int nargs = CADR (mx); */ |
294 | mx = CDDR (mx); | |
212e58ed | 295 | |
314b8716 | 296 | if (BOOT_CLOSURE_P (proc)) |
5fa0939c | 297 | { |
314b8716 AW |
298 | int nreq = BOOT_CLOSURE_NUM_REQUIRED_ARGS (proc); |
299 | SCM new_env = BOOT_CLOSURE_ENV (proc); | |
300 | if (BOOT_CLOSURE_HAS_REST_ARGS (proc)) | |
b7742c6b AW |
301 | { |
302 | if (SCM_UNLIKELY (scm_ilength (mx) < nreq)) | |
303 | scm_wrong_num_args (proc); | |
304 | for (; nreq; nreq--, mx = CDR (mx)) | |
305 | new_env = scm_cons (eval (CAR (mx), env), new_env); | |
306 | { | |
307 | SCM rest = SCM_EOL; | |
308 | for (; scm_is_pair (mx); mx = CDR (mx)) | |
309 | rest = scm_cons (eval (CAR (mx), env), rest); | |
310 | new_env = scm_cons (scm_reverse (rest), | |
311 | new_env); | |
312 | } | |
313 | } | |
314 | else | |
315 | { | |
316 | for (; scm_is_pair (mx); mx = CDR (mx), nreq--) | |
317 | new_env = scm_cons (eval (CAR (mx), env), new_env); | |
318 | if (SCM_UNLIKELY (nreq != 0)) | |
319 | scm_wrong_num_args (proc); | |
320 | } | |
314b8716 | 321 | x = BOOT_CLOSURE_BODY (proc); |
b7742c6b AW |
322 | env = new_env; |
323 | goto loop; | |
5fa0939c | 324 | } |
b7742c6b AW |
325 | else |
326 | { | |
327 | SCM rest = SCM_EOL; | |
9331f91c | 328 | /* FIXME: use alloca */ |
b7742c6b AW |
329 | for (; scm_is_pair (mx); mx = CDR (mx)) |
330 | rest = scm_cons (eval (CAR (mx), env), rest); | |
67e2d80a | 331 | return scm_vm_apply (scm_the_vm (), proc, scm_reverse (rest)); |
b7742c6b AW |
332 | } |
333 | ||
334 | case SCM_M_CONT: | |
babfc7b2 | 335 | return scm_i_call_with_current_continuation (eval (mx, env)); |
212e58ed | 336 | |
b7742c6b AW |
337 | case SCM_M_CALL_WITH_VALUES: |
338 | { | |
339 | SCM producer; | |
340 | SCM v; | |
341 | ||
342 | producer = eval (CAR (mx), env); | |
343 | proc = eval (CDR (mx), env); /* proc is the consumer. */ | |
67e2d80a | 344 | v = scm_vm_apply (scm_the_vm (), producer, SCM_EOL); |
b7742c6b AW |
345 | if (SCM_VALUESP (v)) |
346 | args = scm_struct_ref (v, SCM_INUM0); | |
347 | else | |
348 | args = scm_list_1 (v); | |
349 | goto apply_proc; | |
350 | } | |
26d5b9b4 | 351 | |
b7742c6b AW |
352 | case SCM_M_LEXICAL_REF: |
353 | { | |
354 | int n; | |
355 | SCM ret; | |
356 | for (n = SCM_I_INUM (mx); n; n--) | |
357 | env = CDR (env); | |
358 | ret = CAR (env); | |
359 | if (SCM_UNLIKELY (SCM_UNBNDP (ret))) | |
360 | /* we don't know what variable, though, because we don't have its | |
361 | name */ | |
362 | error_used_before_defined (); | |
363 | return ret; | |
364 | } | |
1cc91f1b | 365 | |
b7742c6b AW |
366 | case SCM_M_LEXICAL_SET: |
367 | { | |
368 | int n; | |
369 | SCM val = eval (CDR (mx), env); | |
370 | for (n = SCM_I_INUM (CAR (mx)); n; n--) | |
371 | env = CDR (env); | |
372 | SCM_SETCAR (env, val); | |
373 | return SCM_UNSPECIFIED; | |
374 | } | |
910b5125 | 375 | |
b7742c6b AW |
376 | case SCM_M_TOPLEVEL_REF: |
377 | if (SCM_VARIABLEP (mx)) | |
378 | return SCM_VARIABLE_REF (mx); | |
379 | else | |
57d23e25 | 380 | { |
b7742c6b | 381 | while (scm_is_pair (env)) |
f3a8d1b7 | 382 | env = CDR (env); |
3149a5b6 AW |
383 | return SCM_VARIABLE_REF |
384 | (scm_memoize_variable_access_x (x, CAPTURE_ENV (env))); | |
57d23e25 | 385 | } |
57d23e25 | 386 | |
b7742c6b AW |
387 | case SCM_M_TOPLEVEL_SET: |
388 | { | |
389 | SCM var = CAR (mx); | |
390 | SCM val = eval (CDR (mx), env); | |
391 | if (SCM_VARIABLEP (var)) | |
392 | { | |
393 | SCM_VARIABLE_SET (var, val); | |
394 | return SCM_UNSPECIFIED; | |
395 | } | |
396 | else | |
397 | { | |
398 | while (scm_is_pair (env)) | |
f3a8d1b7 | 399 | env = CDR (env); |
3149a5b6 AW |
400 | SCM_VARIABLE_SET |
401 | (scm_memoize_variable_access_x (x, CAPTURE_ENV (env)), | |
402 | val); | |
b7742c6b AW |
403 | return SCM_UNSPECIFIED; |
404 | } | |
405 | } | |
910b5125 | 406 | |
b7742c6b AW |
407 | case SCM_M_MODULE_REF: |
408 | if (SCM_VARIABLEP (mx)) | |
409 | return SCM_VARIABLE_REF (mx); | |
910b5125 | 410 | else |
3149a5b6 AW |
411 | return SCM_VARIABLE_REF |
412 | (scm_memoize_variable_access_x (x, SCM_BOOL_F)); | |
910b5125 | 413 | |
b7742c6b AW |
414 | case SCM_M_MODULE_SET: |
415 | if (SCM_VARIABLEP (CDR (mx))) | |
910b5125 | 416 | { |
b7742c6b AW |
417 | SCM_VARIABLE_SET (CDR (mx), eval (CAR (mx), env)); |
418 | return SCM_UNSPECIFIED; | |
419 | } | |
420 | else | |
421 | { | |
3149a5b6 AW |
422 | SCM_VARIABLE_SET |
423 | (scm_memoize_variable_access_x (x, SCM_BOOL_F), | |
424 | eval (CAR (mx), env)); | |
b7742c6b | 425 | return SCM_UNSPECIFIED; |
910b5125 | 426 | } |
910b5125 | 427 | |
747022e4 AW |
428 | case SCM_M_PROMPT: |
429 | { | |
430 | SCM prompt, handler, res; | |
431 | ||
432 | prompt = scm_c_make_prompt (scm_the_vm (), eval (CAR (mx), env), 0); | |
433 | handler = eval (CDDR (mx), env); | |
434 | scm_i_set_dynwinds (scm_cons (prompt, scm_i_dynwinds ())); | |
435 | ||
436 | if (SCM_PROMPT_SETJMP (prompt)) | |
437 | { | |
438 | /* The prompt exited nonlocally. The args are on the VM stack. */ | |
439 | size_t i, n; | |
440 | SCM vals = SCM_EOL; | |
441 | n = scm_to_size_t (SCM_PROMPT_REGISTERS (prompt)->sp[0]); | |
442 | for (i = 0; i < n; i++) | |
443 | vals = scm_cons (SCM_PROMPT_REGISTERS (prompt)->sp[-(i + 1)], vals); | |
444 | /* The abort did reset the VM's registers, but then these values | |
445 | were pushed on; so we need to pop them ourselves. */ | |
446 | SCM_VM_DATA (scm_the_vm ())->sp -= n + 1; | |
447 | /* FIXME NULLSTACK */ | |
448 | ||
449 | /* FIXME mark cont as non-reentrant */ | |
450 | proc = handler; | |
451 | args = vals; | |
452 | goto apply_proc; | |
453 | } | |
454 | ||
455 | res = eval (CADR (mx), env); | |
456 | scm_i_set_dynwinds (CDR (scm_i_dynwinds ())); | |
457 | return res; | |
458 | } | |
459 | ||
b7742c6b AW |
460 | default: |
461 | abort (); | |
462 | } | |
910b5125 DH |
463 | } |
464 | ||
b7742c6b AW |
465 | scm_t_option scm_eval_opts[] = { |
466 | { SCM_OPTION_INTEGER, "stack", 22000, "Size of thread stacks (in machine words)." }, | |
467 | { 0 } | |
468 | }; | |
e6729603 | 469 | |
b7742c6b AW |
470 | scm_t_option scm_debug_opts[] = { |
471 | { SCM_OPTION_BOOLEAN, "cheap", 1, | |
472 | "*This option is now obsolete. Setting it has no effect." }, | |
473 | { SCM_OPTION_BOOLEAN, "breakpoints", 0, "*Check for breakpoints." }, | |
474 | { SCM_OPTION_BOOLEAN, "trace", 0, "*Trace mode." }, | |
475 | { SCM_OPTION_BOOLEAN, "procnames", 1, | |
476 | "Record procedure names at definition." }, | |
477 | { SCM_OPTION_BOOLEAN, "backwards", 0, | |
478 | "Display backtrace in anti-chronological order." }, | |
479 | { SCM_OPTION_INTEGER, "width", 79, "Maximal width of backtrace." }, | |
480 | { SCM_OPTION_INTEGER, "indent", 10, "Maximal indentation in backtrace." }, | |
481 | { SCM_OPTION_INTEGER, "frames", 3, | |
482 | "Maximum number of tail-recursive frames in backtrace." }, | |
483 | { SCM_OPTION_INTEGER, "maxdepth", 1000, | |
484 | "Maximal number of stored backtrace frames." }, | |
485 | { SCM_OPTION_INTEGER, "depth", 20, "Maximal length of printed backtrace." }, | |
486 | { SCM_OPTION_BOOLEAN, "backtrace", 0, "Show backtrace on error." }, | |
487 | { SCM_OPTION_BOOLEAN, "debug", 0, "Use the debugging evaluator." }, | |
488 | /* This default stack limit will be overridden by debug.c:init_stack_limit(), | |
489 | if we have getrlimit() and the stack limit is not INFINITY. But it is still | |
490 | important, as some systems have both the soft and the hard limits set to | |
491 | INFINITY; in that case we fall back to this value. | |
e6729603 | 492 | |
b7742c6b AW |
493 | The situation is aggravated by certain compilers, which can consume |
494 | "beaucoup de stack", as they say in France. | |
0f2d19dd | 495 | |
b7742c6b AW |
496 | See http://thread.gmane.org/gmane.lisp.guile.devel/8599/focus=8662 for |
497 | more discussion. This setting is 640 KB on 32-bit arches (should be enough | |
498 | for anyone!) or a whoppin' 1280 KB on 64-bit arches. | |
499 | */ | |
500 | { SCM_OPTION_INTEGER, "stack", 160000, "Stack size limit (measured in words; 0 = no check)." }, | |
501 | { SCM_OPTION_SCM, "show-file-name", (unsigned long)SCM_BOOL_T, | |
502 | "Show file names and line numbers " | |
503 | "in backtraces when not `#f'. A value of `base' " | |
504 | "displays only base names, while `#t' displays full names."}, | |
505 | { SCM_OPTION_BOOLEAN, "warn-deprecated", 0, | |
506 | "Warn when deprecated features are used." }, | |
507 | { 0 }, | |
508 | }; | |
212e58ed | 509 | |
1cc91f1b | 510 | |
b7742c6b AW |
511 | /* |
512 | * this ordering is awkward and illogical, but we maintain it for | |
513 | * compatibility. --hwn | |
514 | */ | |
515 | scm_t_option scm_evaluator_trap_table[] = { | |
516 | { SCM_OPTION_BOOLEAN, "traps", 0, "Enable evaluator traps." }, | |
517 | { SCM_OPTION_BOOLEAN, "enter-frame", 0, "Trap when eval enters new frame." }, | |
518 | { SCM_OPTION_BOOLEAN, "apply-frame", 0, "Trap when entering apply." }, | |
519 | { SCM_OPTION_BOOLEAN, "exit-frame", 0, "Trap when exiting eval or apply." }, | |
520 | { SCM_OPTION_SCM, "enter-frame-handler", (unsigned long)SCM_BOOL_F, "Handler for enter-frame traps." }, | |
521 | { SCM_OPTION_SCM, "apply-frame-handler", (unsigned long)SCM_BOOL_F, "Handler for apply-frame traps." }, | |
522 | { SCM_OPTION_SCM, "exit-frame-handler", (unsigned long)SCM_BOOL_F, "Handler for exit-frame traps." }, | |
523 | { SCM_OPTION_BOOLEAN, "memoize-symbol", 0, "Trap when memoizing a symbol." }, | |
524 | { SCM_OPTION_SCM, "memoize-symbol-handler", (unsigned long)SCM_BOOL_F, "The handler for memoization." }, | |
525 | { 0 } | |
526 | }; | |
8ea46249 | 527 | |
0f2d19dd | 528 | |
b7742c6b AW |
529 | SCM_DEFINE (scm_eval_options_interface, "eval-options-interface", 0, 1, 0, |
530 | (SCM setting), | |
531 | "Option interface for the evaluation options. Instead of using\n" | |
532 | "this procedure directly, use the procedures @code{eval-enable},\n" | |
533 | "@code{eval-disable}, @code{eval-set!} and @code{eval-options}.") | |
534 | #define FUNC_NAME s_scm_eval_options_interface | |
212e58ed | 535 | { |
b7742c6b AW |
536 | SCM ans; |
537 | ||
538 | scm_dynwind_begin (0); | |
539 | scm_dynwind_critical_section (SCM_BOOL_F); | |
540 | ans = scm_options (setting, | |
541 | scm_eval_opts, | |
542 | FUNC_NAME); | |
543 | scm_dynwind_end (); | |
212e58ed | 544 | |
b7742c6b AW |
545 | return ans; |
546 | } | |
547 | #undef FUNC_NAME | |
0f2d19dd | 548 | |
1cc91f1b | 549 | |
b7742c6b AW |
550 | SCM_DEFINE (scm_evaluator_traps, "evaluator-traps-interface", 0, 1, 0, |
551 | (SCM setting), | |
552 | "Option interface for the evaluator trap options.") | |
553 | #define FUNC_NAME s_scm_evaluator_traps | |
0f2d19dd | 554 | { |
b7742c6b | 555 | SCM ans; |
2a6f7afe | 556 | |
b7742c6b AW |
557 | |
558 | scm_options_try (setting, | |
559 | scm_evaluator_trap_table, | |
560 | FUNC_NAME, 1); | |
561 | SCM_CRITICAL_SECTION_START; | |
562 | ans = scm_options (setting, | |
563 | scm_evaluator_trap_table, | |
564 | FUNC_NAME); | |
2a6f7afe | 565 | |
b7742c6b AW |
566 | /* njrev: same again. */ |
567 | SCM_CRITICAL_SECTION_END; | |
568 | return ans; | |
569 | } | |
570 | #undef FUNC_NAME | |
2a6f7afe | 571 | |
2a6f7afe | 572 | |
2a6f7afe | 573 | |
b7742c6b | 574 | \f |
2a6f7afe | 575 | |
b7742c6b AW |
576 | /* Simple procedure calls |
577 | */ | |
2a6f7afe | 578 | |
b7742c6b AW |
579 | SCM |
580 | scm_call_0 (SCM proc) | |
581 | { | |
bf5a05f2 | 582 | return scm_c_vm_run (scm_the_vm (), proc, NULL, 0); |
0f2d19dd JB |
583 | } |
584 | ||
b7742c6b AW |
585 | SCM |
586 | scm_call_1 (SCM proc, SCM arg1) | |
212e58ed | 587 | { |
bf5a05f2 | 588 | return scm_c_vm_run (scm_the_vm (), proc, &arg1, 1); |
b7742c6b | 589 | } |
212e58ed | 590 | |
b7742c6b AW |
591 | SCM |
592 | scm_call_2 (SCM proc, SCM arg1, SCM arg2) | |
593 | { | |
bf5a05f2 AW |
594 | SCM args[] = { arg1, arg2 }; |
595 | return scm_c_vm_run (scm_the_vm (), proc, args, 2); | |
212e58ed DH |
596 | } |
597 | ||
b7742c6b AW |
598 | SCM |
599 | scm_call_3 (SCM proc, SCM arg1, SCM arg2, SCM arg3) | |
0f2d19dd | 600 | { |
bf5a05f2 AW |
601 | SCM args[] = { arg1, arg2, arg3 }; |
602 | return scm_c_vm_run (scm_the_vm (), proc, args, 3); | |
0f2d19dd JB |
603 | } |
604 | ||
b7742c6b AW |
605 | SCM |
606 | scm_call_4 (SCM proc, SCM arg1, SCM arg2, SCM arg3, SCM arg4) | |
212e58ed | 607 | { |
bf5a05f2 AW |
608 | SCM args[] = { arg1, arg2, arg3, arg4 }; |
609 | return scm_c_vm_run (scm_the_vm (), proc, args, 4); | |
212e58ed DH |
610 | } |
611 | ||
86fd6dff AW |
612 | SCM |
613 | scm_call_n (SCM proc, SCM *argv, size_t nargs) | |
614 | { | |
615 | return scm_c_vm_run (scm_the_vm (), proc, argv, nargs); | |
616 | } | |
617 | ||
b7742c6b | 618 | /* Simple procedure applies |
9fbee57e | 619 | */ |
cc56ba80 | 620 | |
b7742c6b AW |
621 | SCM |
622 | scm_apply_0 (SCM proc, SCM args) | |
623 | { | |
624 | return scm_apply (proc, args, SCM_EOL); | |
0f572ba7 DH |
625 | } |
626 | ||
b7742c6b AW |
627 | SCM |
628 | scm_apply_1 (SCM proc, SCM arg1, SCM args) | |
0f572ba7 | 629 | { |
b7742c6b | 630 | return scm_apply (proc, scm_cons (arg1, args), SCM_EOL); |
8ae95199 DH |
631 | } |
632 | ||
b7742c6b AW |
633 | SCM |
634 | scm_apply_2 (SCM proc, SCM arg1, SCM arg2, SCM args) | |
0f2d19dd | 635 | { |
b7742c6b | 636 | return scm_apply (proc, scm_cons2 (arg1, arg2, args), SCM_EOL); |
0f2d19dd JB |
637 | } |
638 | ||
b7742c6b AW |
639 | SCM |
640 | scm_apply_3 (SCM proc, SCM arg1, SCM arg2, SCM arg3, SCM args) | |
212e58ed | 641 | { |
b7742c6b AW |
642 | return scm_apply (proc, scm_cons (arg1, scm_cons2 (arg2, arg3, args)), |
643 | SCM_EOL); | |
212e58ed DH |
644 | } |
645 | ||
b7742c6b | 646 | /* This code processes the arguments to apply: |
8ea46249 | 647 | |
b7742c6b | 648 | (apply PROC ARG1 ... ARGS) |
302c12b4 | 649 | |
b7742c6b AW |
650 | Given a list (ARG1 ... ARGS), this function conses the ARG1 |
651 | ... arguments onto the front of ARGS, and returns the resulting | |
652 | list. Note that ARGS is a list; thus, the argument to this | |
653 | function is a list whose last element is a list. | |
302c12b4 | 654 | |
b7742c6b AW |
655 | Apply calls this function, and applies PROC to the elements of the |
656 | result. apply:nconc2last takes care of building the list of | |
657 | arguments, given (ARG1 ... ARGS). | |
a954ce1d | 658 | |
b7742c6b AW |
659 | Rather than do new consing, apply:nconc2last destroys its argument. |
660 | On that topic, this code came into my care with the following | |
661 | beautifully cryptic comment on that topic: "This will only screw | |
662 | you if you do (scm_apply scm_apply '( ... ))" If you know what | |
663 | they're referring to, send me a patch to this comment. */ | |
0f2d19dd | 664 | |
b7742c6b AW |
665 | SCM_DEFINE (scm_nconc2last, "apply:nconc2last", 1, 0, 0, |
666 | (SCM lst), | |
667 | "Given a list (@var{arg1} @dots{} @var{args}), this function\n" | |
668 | "conses the @var{arg1} @dots{} arguments onto the front of\n" | |
669 | "@var{args}, and returns the resulting list. Note that\n" | |
670 | "@var{args} is a list; thus, the argument to this function is\n" | |
671 | "a list whose last element is a list.\n" | |
672 | "Note: Rather than do new consing, @code{apply:nconc2last}\n" | |
673 | "destroys its argument, so use with care.") | |
674 | #define FUNC_NAME s_scm_nconc2last | |
212e58ed | 675 | { |
b7742c6b AW |
676 | SCM *lloc; |
677 | SCM_VALIDATE_NONEMPTYLIST (1, lst); | |
678 | lloc = &lst; | |
679 | while (!scm_is_null (SCM_CDR (*lloc))) /* Perhaps should be | |
680 | SCM_NULL_OR_NIL_P, but not | |
681 | needed in 99.99% of cases, | |
682 | and it could seriously hurt | |
683 | performance. - Neil */ | |
684 | lloc = SCM_CDRLOC (*lloc); | |
685 | SCM_ASSERT (scm_ilength (SCM_CAR (*lloc)) >= 0, lst, SCM_ARG1, FUNC_NAME); | |
686 | *lloc = SCM_CAR (*lloc); | |
687 | return lst; | |
212e58ed | 688 | } |
b7742c6b | 689 | #undef FUNC_NAME |
212e58ed | 690 | |
b8229a3b MS |
691 | |
692 | ||
b7742c6b | 693 | /* Typechecking for multi-argument MAP and FOR-EACH. |
0f2d19dd | 694 | |
b7742c6b AW |
695 | Verify that each element of the vector ARGV, except for the first, |
696 | is a proper list whose length is LEN. Attribute errors to WHO, | |
697 | and claim that the i'th element of ARGV is WHO's i+2'th argument. */ | |
698 | static inline void | |
699 | check_map_args (SCM argv, | |
700 | long len, | |
701 | SCM gf, | |
702 | SCM proc, | |
703 | SCM args, | |
704 | const char *who) | |
212e58ed | 705 | { |
b7742c6b | 706 | long i; |
0f2d19dd | 707 | |
b7742c6b | 708 | for (i = SCM_SIMPLE_VECTOR_LENGTH (argv) - 1; i >= 1; i--) |
9fbee57e | 709 | { |
b7742c6b AW |
710 | SCM elt = SCM_SIMPLE_VECTOR_REF (argv, i); |
711 | long elt_len = scm_ilength (elt); | |
5cb22e96 | 712 | |
b7742c6b AW |
713 | if (elt_len < 0) |
714 | { | |
715 | if (gf) | |
716 | scm_apply_generic (gf, scm_cons (proc, args)); | |
717 | else | |
718 | scm_wrong_type_arg (who, i + 2, elt); | |
719 | } | |
1cc91f1b | 720 | |
b7742c6b AW |
721 | if (elt_len != len) |
722 | scm_out_of_range_pos (who, elt, scm_from_long (i + 2)); | |
0f2d19dd | 723 | } |
0f2d19dd | 724 | } |
6dbd0af5 | 725 | |
212e58ed | 726 | |
b7742c6b | 727 | SCM_GPROC (s_map, "map", 2, 0, 1, scm_map, g_map); |
212e58ed | 728 | |
b7742c6b AW |
729 | /* Note: Currently, scm_map applies PROC to the argument list(s) |
730 | sequentially, starting with the first element(s). This is used in | |
731 | evalext.c where the Scheme procedure `map-in-order', which guarantees | |
732 | sequential behaviour, is implemented using scm_map. If the | |
733 | behaviour changes, we need to update `map-in-order'. | |
734 | */ | |
0f2d19dd | 735 | |
b7742c6b AW |
736 | SCM |
737 | scm_map (SCM proc, SCM arg1, SCM args) | |
738 | #define FUNC_NAME s_map | |
0f2d19dd | 739 | { |
b7742c6b AW |
740 | long i, len; |
741 | SCM res = SCM_EOL; | |
742 | SCM *pres = &res; | |
0f2d19dd | 743 | |
b7742c6b AW |
744 | len = scm_ilength (arg1); |
745 | SCM_GASSERTn (len >= 0, | |
746 | g_map, scm_cons2 (proc, arg1, args), SCM_ARG2, s_map); | |
747 | SCM_VALIDATE_REST_ARGUMENT (args); | |
748 | if (scm_is_null (args)) | |
0f2d19dd | 749 | { |
b7742c6b AW |
750 | SCM_GASSERT2 (scm_is_true (scm_procedure_p (proc)), g_map, proc, arg1, SCM_ARG1, s_map); |
751 | while (SCM_NIMP (arg1)) | |
752 | { | |
753 | *pres = scm_list_1 (scm_call_1 (proc, SCM_CAR (arg1))); | |
754 | pres = SCM_CDRLOC (*pres); | |
755 | arg1 = SCM_CDR (arg1); | |
756 | } | |
757 | return res; | |
0f2d19dd | 758 | } |
b7742c6b AW |
759 | if (scm_is_null (SCM_CDR (args))) |
760 | { | |
761 | SCM arg2 = SCM_CAR (args); | |
762 | int len2 = scm_ilength (arg2); | |
763 | SCM_GASSERTn (scm_is_true (scm_procedure_p (proc)), g_map, | |
764 | scm_cons2 (proc, arg1, args), SCM_ARG1, s_map); | |
765 | SCM_GASSERTn (len2 >= 0, | |
766 | g_map, scm_cons2 (proc, arg1, args), SCM_ARG3, s_map); | |
767 | if (len2 != len) | |
768 | SCM_OUT_OF_RANGE (3, arg2); | |
769 | while (SCM_NIMP (arg1)) | |
770 | { | |
771 | *pres = scm_list_1 (scm_call_2 (proc, SCM_CAR (arg1), SCM_CAR (arg2))); | |
772 | pres = SCM_CDRLOC (*pres); | |
773 | arg1 = SCM_CDR (arg1); | |
774 | arg2 = SCM_CDR (arg2); | |
775 | } | |
776 | return res; | |
777 | } | |
778 | arg1 = scm_cons (arg1, args); | |
779 | args = scm_vector (arg1); | |
780 | check_map_args (args, len, g_map, proc, arg1, s_map); | |
781 | while (1) | |
d6754c23 | 782 | { |
b7742c6b AW |
783 | arg1 = SCM_EOL; |
784 | for (i = SCM_SIMPLE_VECTOR_LENGTH (args) - 1; i >= 0; i--) | |
785 | { | |
786 | SCM elt = SCM_SIMPLE_VECTOR_REF (args, i); | |
787 | if (SCM_IMP (elt)) | |
788 | return res; | |
789 | arg1 = scm_cons (SCM_CAR (elt), arg1); | |
790 | SCM_SIMPLE_VECTOR_SET (args, i, SCM_CDR (elt)); | |
791 | } | |
792 | *pres = scm_list_1 (scm_apply (proc, arg1, SCM_EOL)); | |
793 | pres = SCM_CDRLOC (*pres); | |
d6754c23 | 794 | } |
0f2d19dd | 795 | } |
b7742c6b | 796 | #undef FUNC_NAME |
0f2d19dd | 797 | |
302c12b4 | 798 | |
b7742c6b | 799 | SCM_GPROC (s_for_each, "for-each", 2, 0, 1, scm_for_each, g_for_each); |
d6754c23 | 800 | |
b7742c6b AW |
801 | SCM |
802 | scm_for_each (SCM proc, SCM arg1, SCM args) | |
803 | #define FUNC_NAME s_for_each | |
0f2d19dd | 804 | { |
b7742c6b AW |
805 | long i, len; |
806 | len = scm_ilength (arg1); | |
807 | SCM_GASSERTn (len >= 0, g_for_each, scm_cons2 (proc, arg1, args), | |
808 | SCM_ARG2, s_for_each); | |
809 | SCM_VALIDATE_REST_ARGUMENT (args); | |
810 | if (scm_is_null (args)) | |
26d5b9b4 | 811 | { |
b7742c6b AW |
812 | SCM_GASSERT2 (scm_is_true (scm_procedure_p (proc)), g_for_each, |
813 | proc, arg1, SCM_ARG1, s_for_each); | |
814 | while (SCM_NIMP (arg1)) | |
815 | { | |
816 | scm_call_1 (proc, SCM_CAR (arg1)); | |
817 | arg1 = SCM_CDR (arg1); | |
818 | } | |
819 | return SCM_UNSPECIFIED; | |
26d5b9b4 | 820 | } |
b7742c6b | 821 | if (scm_is_null (SCM_CDR (args))) |
26d5b9b4 | 822 | { |
b7742c6b AW |
823 | SCM arg2 = SCM_CAR (args); |
824 | int len2 = scm_ilength (arg2); | |
825 | SCM_GASSERTn (scm_is_true (scm_procedure_p (proc)), g_for_each, | |
826 | scm_cons2 (proc, arg1, args), SCM_ARG1, s_for_each); | |
827 | SCM_GASSERTn (len2 >= 0, g_for_each, | |
828 | scm_cons2 (proc, arg1, args), SCM_ARG3, s_for_each); | |
829 | if (len2 != len) | |
830 | SCM_OUT_OF_RANGE (3, arg2); | |
831 | while (SCM_NIMP (arg1)) | |
832 | { | |
833 | scm_call_2 (proc, SCM_CAR (arg1), SCM_CAR (arg2)); | |
834 | arg1 = SCM_CDR (arg1); | |
835 | arg2 = SCM_CDR (arg2); | |
836 | } | |
837 | return SCM_UNSPECIFIED; | |
26d5b9b4 | 838 | } |
b7742c6b AW |
839 | arg1 = scm_cons (arg1, args); |
840 | args = scm_vector (arg1); | |
841 | check_map_args (args, len, g_for_each, proc, arg1, s_for_each); | |
842 | while (1) | |
302c12b4 | 843 | { |
b7742c6b AW |
844 | arg1 = SCM_EOL; |
845 | for (i = SCM_SIMPLE_VECTOR_LENGTH (args) - 1; i >= 0; i--) | |
71560395 | 846 | { |
b7742c6b AW |
847 | SCM elt = SCM_SIMPLE_VECTOR_REF (args, i); |
848 | if (SCM_IMP (elt)) | |
849 | return SCM_UNSPECIFIED; | |
850 | arg1 = scm_cons (SCM_CAR (elt), arg1); | |
851 | SCM_SIMPLE_VECTOR_SET (args, i, SCM_CDR (elt)); | |
852 | } | |
853 | scm_apply (proc, arg1, SCM_EOL); | |
854 | } | |
855 | } | |
856 | #undef FUNC_NAME | |
71560395 | 857 | |
71560395 | 858 | |
5f161164 AW |
859 | static SCM |
860 | scm_c_primitive_eval (SCM exp) | |
b7742c6b AW |
861 | { |
862 | SCM transformer = scm_current_module_transformer (); | |
863 | if (scm_is_true (transformer)) | |
864 | exp = scm_call_1 (transformer, exp); | |
865 | exp = scm_memoize_expression (exp); | |
866 | return eval (exp, SCM_EOL); | |
867 | } | |
5f161164 AW |
868 | |
869 | static SCM var_primitive_eval; | |
870 | SCM | |
871 | scm_primitive_eval (SCM exp) | |
872 | { | |
873 | return scm_c_vm_run (scm_the_vm (), scm_variable_ref (var_primitive_eval), | |
874 | &exp, 1); | |
875 | } | |
71560395 | 876 | |
b7742c6b AW |
877 | |
878 | /* Eval does not take the second arg optionally. This is intentional | |
879 | * in order to be R5RS compatible, and to prepare for the new module | |
880 | * system, where we would like to make the choice of evaluation | |
881 | * environment explicit. */ | |
882 | ||
883 | SCM_DEFINE (scm_eval, "eval", 2, 0, 0, | |
884 | (SCM exp, SCM module_or_state), | |
885 | "Evaluate @var{exp}, a list representing a Scheme expression,\n" | |
886 | "in the top-level environment specified by\n" | |
887 | "@var{module_or_state}.\n" | |
888 | "While @var{exp} is evaluated (using @code{primitive-eval}),\n" | |
889 | "@var{module_or_state} is made the current module when\n" | |
890 | "it is a module, or the current dynamic state when it is\n" | |
891 | "a dynamic state." | |
892 | "Example: (eval '(+ 1 2) (interaction-environment))") | |
893 | #define FUNC_NAME s_scm_eval | |
894 | { | |
895 | SCM res; | |
896 | ||
897 | scm_dynwind_begin (SCM_F_DYNWIND_REWINDABLE); | |
898 | if (scm_is_dynamic_state (module_or_state)) | |
899 | scm_dynwind_current_dynamic_state (module_or_state); | |
900 | else if (scm_module_system_booted_p) | |
901 | { | |
902 | SCM_VALIDATE_MODULE (2, module_or_state); | |
903 | scm_dynwind_current_module (module_or_state); | |
71560395 | 904 | } |
b7742c6b | 905 | /* otherwise if the module system isn't booted, ignore the module arg */ |
71560395 | 906 | |
b7742c6b AW |
907 | res = scm_primitive_eval (exp); |
908 | ||
909 | scm_dynwind_end (); | |
910 | return res; | |
911 | } | |
912 | #undef FUNC_NAME | |
71560395 AW |
913 | |
914 | ||
b7742c6b | 915 | static SCM f_apply; |
71560395 AW |
916 | |
917 | /* Apply a function to a list of arguments. | |
918 | ||
919 | This function is exported to the Scheme level as taking two | |
920 | required arguments and a tail argument, as if it were: | |
921 | (lambda (proc arg1 . args) ...) | |
922 | Thus, if you just have a list of arguments to pass to a procedure, | |
923 | pass the list as ARG1, and '() for ARGS. If you have some fixed | |
924 | args, pass the first as ARG1, then cons any remaining fixed args | |
925 | onto the front of your argument list, and pass that as ARGS. */ | |
926 | ||
927 | SCM | |
928 | scm_apply (SCM proc, SCM arg1, SCM args) | |
929 | { | |
b7742c6b | 930 | /* Fix things up so that args contains all args. */ |
71560395 | 931 | if (scm_is_null (args)) |
b7742c6b | 932 | args = arg1; |
71560395 | 933 | else |
b7742c6b | 934 | args = scm_cons_star (arg1, args); |
71560395 | 935 | |
67e2d80a | 936 | return scm_vm_apply (scm_the_vm (), proc, args); |
b7742c6b | 937 | } |
434f2f7a DH |
938 | |
939 | ||
314b8716 AW |
940 | static SCM |
941 | boot_closure_apply (SCM closure, SCM args) | |
942 | { | |
943 | int nreq = BOOT_CLOSURE_NUM_REQUIRED_ARGS (closure); | |
944 | SCM new_env = BOOT_CLOSURE_ENV (closure); | |
945 | if (BOOT_CLOSURE_HAS_REST_ARGS (closure)) | |
946 | { | |
947 | if (SCM_UNLIKELY (scm_ilength (args) < nreq)) | |
948 | scm_wrong_num_args (closure); | |
949 | for (; nreq; nreq--, args = CDR (args)) | |
950 | new_env = scm_cons (CAR (args), new_env); | |
951 | new_env = scm_cons (args, new_env); | |
952 | } | |
953 | else | |
954 | { | |
955 | if (SCM_UNLIKELY (scm_ilength (args) != nreq)) | |
956 | scm_wrong_num_args (closure); | |
957 | for (; scm_is_pair (args); args = CDR (args)) | |
958 | new_env = scm_cons (CAR (args), new_env); | |
959 | } | |
960 | return eval (BOOT_CLOSURE_BODY (closure), new_env); | |
961 | } | |
962 | ||
963 | static int | |
964 | boot_closure_print (SCM closure, SCM port, scm_print_state *pstate) | |
965 | { | |
966 | SCM args; | |
967 | scm_puts ("#<boot-closure ", port); | |
968 | scm_uintprint ((unsigned long)SCM2PTR (closure), 16, port); | |
969 | scm_putc (' ', port); | |
970 | args = scm_make_list (scm_from_int (BOOT_CLOSURE_NUM_REQUIRED_ARGS (closure)), | |
971 | scm_from_locale_symbol ("_")); | |
972 | if (BOOT_CLOSURE_HAS_REST_ARGS (closure)) | |
973 | args = scm_cons_star (scm_from_locale_symbol ("_"), args); | |
974 | scm_display (args, port); | |
975 | scm_putc ('>', port); | |
976 | return 1; | |
977 | } | |
978 | ||
0f2d19dd JB |
979 | void |
980 | scm_init_eval () | |
0f2d19dd | 981 | { |
5f161164 AW |
982 | SCM primitive_eval; |
983 | ||
33b97402 | 984 | scm_init_opts (scm_evaluator_traps, |
62560650 | 985 | scm_evaluator_trap_table); |
33b97402 | 986 | scm_init_opts (scm_eval_options_interface, |
62560650 | 987 | scm_eval_opts); |
33b97402 | 988 | |
df9ca8d8 | 989 | f_apply = scm_c_define_gsubr ("apply", 2, 0, 1, scm_apply); |
86d31dfe | 990 | |
314b8716 AW |
991 | scm_tc16_boot_closure = scm_make_smob_type ("boot-closure", 0); |
992 | scm_set_smob_apply (scm_tc16_boot_closure, boot_closure_apply, 0, 0, 1); | |
993 | scm_set_smob_print (scm_tc16_boot_closure, boot_closure_print); | |
994 | ||
5f161164 AW |
995 | primitive_eval = scm_c_make_gsubr ("primitive-eval", 1, 0, 0, |
996 | scm_c_primitive_eval); | |
997 | var_primitive_eval = scm_define (SCM_SUBR_NAME (primitive_eval), | |
998 | primitive_eval); | |
999 | ||
a0599745 | 1000 | #include "libguile/eval.x" |
0f2d19dd | 1001 | } |
0f2d19dd | 1002 | |
89e00824 ML |
1003 | /* |
1004 | Local Variables: | |
1005 | c-file-style: "gnu" | |
1006 | End: | |
1007 | */ | |
62560650 | 1008 |