Commit | Line | Data |
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d0b07b5d | 1 | /* Copyright (C) 1995,1996,1997,1998,1999,2000,2001,2002,2003 Free Software Foundation, Inc. |
0f2d19dd | 2 | * |
73be1d9e MV |
3 | * This library is free software; you can redistribute it and/or |
4 | * modify it under the terms of the GNU Lesser General Public | |
5 | * License as published by the Free Software Foundation; either | |
6 | * version 2.1 of the License, or (at your option) any later version. | |
0f2d19dd | 7 | * |
73be1d9e MV |
8 | * This library is distributed in the hope that it will be useful, |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * Lesser General Public License for more details. | |
0f2d19dd | 12 | * |
73be1d9e MV |
13 | * You should have received a copy of the GNU Lesser General Public |
14 | * License along with this library; if not, write to the Free Software | |
15 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
16 | */ | |
1bbd0b84 | 17 | |
0f2d19dd JB |
18 | \f |
19 | ||
6dbd0af5 MD |
20 | /* This file is read twice in order to produce debugging versions of |
21 | * scm_ceval and scm_apply. These functions, scm_deval and | |
22 | * scm_dapply, are produced when we define the preprocessor macro | |
23 | * DEVAL. The file is divided into sections which are treated | |
24 | * differently with respect to DEVAL. The heads of these sections are | |
25 | * marked with the string "SECTION:". | |
26 | */ | |
27 | ||
6dbd0af5 | 28 | /* SECTION: This code is compiled once. |
0f2d19dd JB |
29 | */ |
30 | ||
3d05f2e0 RB |
31 | #if HAVE_CONFIG_H |
32 | # include <config.h> | |
33 | #endif | |
0f2d19dd | 34 | |
3d05f2e0 RB |
35 | #include "libguile/__scm.h" |
36 | ||
37 | #ifndef DEVAL | |
d16332b3 | 38 | |
48b96f4b JB |
39 | /* AIX requires this to be the first thing in the file. The #pragma |
40 | directive is indented so pre-ANSI compilers will ignore it, rather | |
41 | than choke on it. */ | |
5862b540 | 42 | #ifndef __GNUC__ |
48b96f4b JB |
43 | # if HAVE_ALLOCA_H |
44 | # include <alloca.h> | |
45 | # else | |
46 | # ifdef _AIX | |
ac13d9d2 | 47 | # pragma alloca |
48b96f4b JB |
48 | # else |
49 | # ifndef alloca /* predefined by HP cc +Olibcalls */ | |
50 | char *alloca (); | |
51 | # endif | |
52 | # endif | |
53 | # endif | |
54 | #endif | |
55 | ||
a0599745 MD |
56 | #include "libguile/_scm.h" |
57 | #include "libguile/debug.h" | |
09074dbf | 58 | #include "libguile/dynwind.h" |
a0599745 MD |
59 | #include "libguile/alist.h" |
60 | #include "libguile/eq.h" | |
61 | #include "libguile/continuations.h" | |
756414cf | 62 | #include "libguile/futures.h" |
e6729603 | 63 | #include "libguile/strings.h" |
a0599745 MD |
64 | #include "libguile/throw.h" |
65 | #include "libguile/smob.h" | |
66 | #include "libguile/macros.h" | |
67 | #include "libguile/procprop.h" | |
68 | #include "libguile/hashtab.h" | |
69 | #include "libguile/hash.h" | |
70 | #include "libguile/srcprop.h" | |
71 | #include "libguile/stackchk.h" | |
72 | #include "libguile/objects.h" | |
73 | #include "libguile/async.h" | |
74 | #include "libguile/feature.h" | |
75 | #include "libguile/modules.h" | |
76 | #include "libguile/ports.h" | |
77 | #include "libguile/root.h" | |
78 | #include "libguile/vectors.h" | |
549e6ec6 | 79 | #include "libguile/fluids.h" |
f12745b6 | 80 | #include "libguile/goops.h" |
a513ead3 | 81 | #include "libguile/values.h" |
a0599745 MD |
82 | |
83 | #include "libguile/validate.h" | |
84 | #include "libguile/eval.h" | |
c96d76b8 | 85 | #include "libguile/lang.h" |
89efbff4 | 86 | |
0f2d19dd JB |
87 | \f |
88 | ||
e6729603 DH |
89 | /* {Syntax Errors} |
90 | * | |
91 | * This section defines the message strings for the syntax errors that can be | |
92 | * detected during memoization and the functions and macros that shall be | |
93 | * called by the memoizer code to signal syntax errors. */ | |
94 | ||
95 | ||
96 | /* Syntax errors that can be detected during memoization: */ | |
97 | ||
98 | /* Circular or improper lists do not form valid scheme expressions. If a | |
99 | * circular list or an improper list is detected in a place where a scheme | |
100 | * expression is expected, a 'Bad expression' error is signalled. */ | |
101 | static const char s_bad_expression[] = "Bad expression"; | |
102 | ||
2a6f7afe DH |
103 | /* Case or cond expressions must have at least one clause. If a case or cond |
104 | * expression without any clauses is detected, a 'Missing clauses' error is | |
105 | * signalled. */ | |
106 | static const char s_missing_clauses[] = "Missing clauses"; | |
107 | ||
108 | /* If a case clause is detected that is not in the format | |
109 | * (<label(s)> <expression1> <expression2> ...) | |
110 | * a 'Bad case clause' error is signalled. */ | |
111 | static const char s_bad_case_clause[] = "Bad case clause"; | |
112 | ||
113 | /* If there is an 'else' clause in a case statement, it must be the last | |
114 | * clause. If after the 'else' case clause further clauses are detected, an | |
115 | * 'Extra case clause' error is signalled. */ | |
116 | static const char s_extra_case_clause[] = "Extra case clause"; | |
117 | ||
118 | /* If a case clause is detected where the <label(s)> element is neither a | |
119 | * proper list nor (in case of the last clause) the syntactic keyword 'else', | |
120 | * a 'Bad case labels' error is signalled. Note: If you encounter this error | |
121 | * for an else-clause which seems to be syntactically correct, check if 'else' | |
122 | * is really a syntactic keyword in that context. If 'else' is bound in the | |
123 | * local or global environment, it is not considered a syntactic keyword, but | |
124 | * will be treated as any other variable. */ | |
125 | static const char s_bad_case_labels[] = "Bad case labels"; | |
126 | ||
127 | /* In a case statement all labels have to be distinct. If in a case statement | |
128 | * a label occurs more than once, a 'Duplicate case label' error is | |
129 | * signalled. */ | |
130 | static const char s_duplicate_case_label[] = "Duplicate case label"; | |
131 | ||
e6729603 DH |
132 | |
133 | /* Signal a syntax error. We distinguish between the form that caused the | |
134 | * error and the enclosing expression. The error message will print out as | |
135 | * shown in the following pattern. The file name and line number are only | |
136 | * given when they can be determined from the erroneous form or from the | |
137 | * enclosing expression. | |
138 | * | |
139 | * <filename>: In procedure memoization: | |
140 | * <filename>: In file <name>, line <nr>: <error-message> in <expression>. */ | |
141 | ||
142 | SCM_SYMBOL (syntax_error_key, "syntax-error"); | |
143 | ||
144 | /* The prototype is needed to indicate that the function does not return. */ | |
145 | static void | |
146 | syntax_error (const char* const, const SCM, const SCM) SCM_NORETURN; | |
147 | ||
148 | static void | |
149 | syntax_error (const char* const msg, const SCM form, const SCM expr) | |
150 | { | |
151 | const SCM msg_string = scm_makfrom0str (msg); | |
152 | SCM filename = SCM_BOOL_F; | |
153 | SCM linenr = SCM_BOOL_F; | |
154 | const char *format; | |
155 | SCM args; | |
156 | ||
157 | if (SCM_CONSP (form)) | |
158 | { | |
159 | filename = scm_source_property (form, scm_sym_filename); | |
160 | linenr = scm_source_property (form, scm_sym_line); | |
161 | } | |
162 | ||
163 | if (SCM_FALSEP (filename) && SCM_FALSEP (linenr) && SCM_CONSP (expr)) | |
164 | { | |
165 | filename = scm_source_property (expr, scm_sym_filename); | |
166 | linenr = scm_source_property (expr, scm_sym_line); | |
167 | } | |
168 | ||
169 | if (!SCM_UNBNDP (expr)) | |
170 | { | |
171 | if (!SCM_FALSEP (filename)) | |
172 | { | |
173 | format = "In file ~S, line ~S: ~A ~S in expression ~S."; | |
174 | args = scm_list_5 (filename, linenr, msg_string, form, expr); | |
175 | } | |
176 | else if (!SCM_FALSEP (linenr)) | |
177 | { | |
178 | format = "In line ~S: ~A ~S in expression ~S."; | |
179 | args = scm_list_4 (linenr, msg_string, form, expr); | |
180 | } | |
181 | else | |
182 | { | |
183 | format = "~A ~S in expression ~S."; | |
184 | args = scm_list_3 (msg_string, form, expr); | |
185 | } | |
186 | } | |
187 | else | |
188 | { | |
189 | if (!SCM_FALSEP (filename)) | |
190 | { | |
191 | format = "In file ~S, line ~S: ~A ~S."; | |
192 | args = scm_list_4 (filename, linenr, msg_string, form); | |
193 | } | |
194 | else if (!SCM_FALSEP (linenr)) | |
195 | { | |
196 | format = "In line ~S: ~A ~S."; | |
197 | args = scm_list_3 (linenr, msg_string, form); | |
198 | } | |
199 | else | |
200 | { | |
201 | format = "~A ~S."; | |
202 | args = scm_list_2 (msg_string, form); | |
203 | } | |
204 | } | |
205 | ||
206 | scm_error (syntax_error_key, "memoization", format, args, SCM_BOOL_F); | |
207 | } | |
208 | ||
209 | ||
210 | /* Shortcut macros to simplify syntax error handling. */ | |
211 | #define ASSERT_SYNTAX(cond, message, form) \ | |
212 | { if (!(cond)) syntax_error (message, form, SCM_UNDEFINED); } | |
213 | #define ASSERT_SYNTAX_2(cond, message, form, expr) \ | |
214 | { if (!(cond)) syntax_error (message, form, expr); } | |
215 | ||
216 | \f | |
217 | ||
d0624e39 DH |
218 | /* {Ilocs} |
219 | * | |
220 | * Ilocs are memoized references to variables in local environment frames. | |
221 | * They are represented as three values: The relative offset of the | |
222 | * environment frame, the number of the binding within that frame, and a | |
223 | * boolean value indicating whether the binding is the last binding in the | |
224 | * frame. | |
225 | */ | |
226 | #define SCM_ILOC00 SCM_MAKE_ITAG8(0L, scm_tc8_iloc) | |
227 | #define SCM_IDINC (0x00100000L) | |
228 | #define SCM_IDSTMSK (-SCM_IDINC) | |
229 | #define SCM_MAKE_ILOC(frame_nr, binding_nr, last_p) \ | |
230 | SCM_PACK ( \ | |
231 | ((frame_nr) << 8) \ | |
232 | + ((binding_nr) << 20) \ | |
233 | + ((last_p) ? SCM_ICDR : 0) \ | |
234 | + scm_tc8_iloc ) | |
235 | ||
236 | #if (SCM_DEBUG_DEBUGGING_SUPPORT == 1) | |
237 | ||
238 | SCM scm_dbg_make_iloc (SCM frame, SCM binding, SCM cdrp); | |
239 | SCM_DEFINE (scm_dbg_make_iloc, "dbg-make-iloc", 3, 0, 0, | |
240 | (SCM frame, SCM binding, SCM cdrp), | |
241 | "Return a new iloc with frame offset @var{frame}, binding\n" | |
242 | "offset @var{binding} and the cdr flag @var{cdrp}.") | |
243 | #define FUNC_NAME s_scm_dbg_make_iloc | |
244 | { | |
245 | SCM_VALIDATE_INUM (1, frame); | |
246 | SCM_VALIDATE_INUM (2, binding); | |
247 | return SCM_MAKE_ILOC (SCM_INUM (frame), | |
248 | SCM_INUM (binding), | |
249 | !SCM_FALSEP (cdrp)); | |
250 | } | |
251 | #undef FUNC_NAME | |
252 | ||
253 | SCM scm_dbg_iloc_p (SCM obj); | |
254 | SCM_DEFINE (scm_dbg_iloc_p, "dbg-iloc?", 1, 0, 0, | |
255 | (SCM obj), | |
256 | "Return @code{#t} if @var{obj} is an iloc.") | |
257 | #define FUNC_NAME s_scm_dbg_iloc_p | |
258 | { | |
259 | return SCM_BOOL (SCM_ILOCP (obj)); | |
260 | } | |
261 | #undef FUNC_NAME | |
262 | ||
263 | #endif | |
264 | ||
265 | \f | |
266 | ||
17fa3fcf DH |
267 | #define SCM_VALIDATE_NON_EMPTY_COMBINATION(x) \ |
268 | do { \ | |
269 | if (SCM_EQ_P ((x), SCM_EOL)) \ | |
e90c3a89 | 270 | scm_misc_error (NULL, s_expression, SCM_EOL); \ |
17fa3fcf DH |
271 | } while (0) |
272 | ||
273 | \f | |
274 | ||
6dbd0af5 MD |
275 | /* The evaluator contains a plethora of EVAL symbols. |
276 | * This is an attempt at explanation. | |
277 | * | |
278 | * The following macros should be used in code which is read twice | |
279 | * (where the choice of evaluator is hard soldered): | |
280 | * | |
281 | * SCM_CEVAL is the symbol used within one evaluator to call itself. | |
282 | * Originally, it is defined to scm_ceval, but is redefined to | |
283 | * scm_deval during the second pass. | |
284 | * | |
6cb702da | 285 | * SCM_EVALIM is used when it is known that the expression is an |
6dbd0af5 MD |
286 | * immediate. (This macro never calls an evaluator.) |
287 | * | |
288 | * EVALCAR evaluates the car of an expression. | |
289 | * | |
6dbd0af5 MD |
290 | * The following macros should be used in code which is read once |
291 | * (where the choice of evaluator is dynamic): | |
292 | * | |
6cb702da | 293 | * SCM_XEVAL takes care of immediates without calling an evaluator. It |
6dbd0af5 MD |
294 | * then calls scm_ceval *or* scm_deval, depending on the debugging |
295 | * mode. | |
296 | * | |
6cb702da | 297 | * SCM_XEVALCAR corresponds to EVALCAR, but uses scm_ceval *or* scm_deval |
6dbd0af5 MD |
298 | * depending on the debugging mode. |
299 | * | |
300 | * The main motivation for keeping this plethora is efficiency | |
301 | * together with maintainability (=> locality of code). | |
302 | */ | |
303 | ||
6cb702da | 304 | #define SCM_CEVAL scm_ceval |
0f2d19dd | 305 | |
e90c3a89 DH |
306 | #define SCM_EVALIM2(x) \ |
307 | ((SCM_EQ_P ((x), SCM_EOL) \ | |
308 | ? scm_misc_error (NULL, s_expression, SCM_EOL), 0 \ | |
309 | : 0), \ | |
310 | (x)) | |
311 | ||
312 | #define SCM_EVALIM(x, env) (SCM_ILOCP (x) \ | |
313 | ? *scm_ilookup ((x), env) \ | |
314 | : SCM_EVALIM2(x)) | |
315 | ||
316 | #define SCM_XEVAL(x, env) (SCM_IMP (x) \ | |
317 | ? SCM_EVALIM2(x) \ | |
318 | : (*scm_ceval_ptr) ((x), (env))) | |
319 | ||
320 | #define SCM_XEVALCAR(x, env) (SCM_IMP (SCM_CAR (x)) \ | |
321 | ? SCM_EVALIM (SCM_CAR (x), env) \ | |
322 | : (SCM_SYMBOLP (SCM_CAR (x)) \ | |
323 | ? *scm_lookupcar (x, env, 1) \ | |
324 | : (*scm_ceval_ptr) (SCM_CAR (x), env))) | |
325 | ||
8c494e99 | 326 | #define EVALCAR(x, env) (SCM_IMP (SCM_CAR (x)) \ |
904a077d | 327 | ? SCM_EVALIM (SCM_CAR (x), env) \ |
680516ba DH |
328 | : (SCM_SYMBOLP (SCM_CAR (x)) \ |
329 | ? *scm_lookupcar (x, env, 1) \ | |
330 | : SCM_CEVAL (SCM_CAR (x), env))) | |
0f2d19dd | 331 | |
28d52ebb | 332 | SCM_REC_MUTEX (source_mutex); |
9bc4701c | 333 | |
12841895 | 334 | |
e90c3a89 DH |
335 | static const char s_expression[] = "missing or extra expression"; |
336 | static const char s_test[] = "bad test"; | |
337 | static const char s_body[] = "bad body"; | |
338 | static const char s_bindings[] = "bad bindings"; | |
339 | static const char s_duplicate_bindings[] = "duplicate bindings"; | |
340 | static const char s_variable[] = "bad variable"; | |
341 | static const char s_clauses[] = "bad or missing clauses"; | |
342 | static const char s_formals[] = "bad formals"; | |
343 | static const char s_duplicate_formals[] = "duplicate formals"; | |
344 | static const char s_splicing[] = "bad (non-list) result for unquote-splicing"; | |
345 | ||
346 | ||
12841895 DH |
347 | /* Lookup a given local variable in an environment. The local variable is |
348 | * given as an iloc, that is a triple <frame, binding, last?>, where frame | |
349 | * indicates the relative number of the environment frame (counting upwards | |
350 | * from the innermost environment frame), binding indicates the number of the | |
351 | * binding within the frame, and last? (which is extracted from the iloc using | |
352 | * the macro SCM_ICDRP) indicates whether the binding forms the binding at the | |
353 | * very end of the improper list of bindings. */ | |
0f2d19dd | 354 | SCM * |
6e8d25a6 | 355 | scm_ilookup (SCM iloc, SCM env) |
0f2d19dd | 356 | { |
12841895 DH |
357 | unsigned int frame_nr = SCM_IFRAME (iloc); |
358 | unsigned int binding_nr = SCM_IDIST (iloc); | |
359 | SCM frames = env; | |
360 | SCM bindings; | |
361 | ||
362 | for (; 0 != frame_nr; --frame_nr) | |
363 | frames = SCM_CDR (frames); | |
364 | ||
365 | bindings = SCM_CAR (frames); | |
366 | for (; 0 != binding_nr; --binding_nr) | |
367 | bindings = SCM_CDR (bindings); | |
368 | ||
0f2d19dd | 369 | if (SCM_ICDRP (iloc)) |
12841895 DH |
370 | return SCM_CDRLOC (bindings); |
371 | return SCM_CARLOC (SCM_CDR (bindings)); | |
0f2d19dd | 372 | } |
0f2d19dd | 373 | |
12841895 | 374 | |
f8769b1d MV |
375 | /* The Lookup Car Race |
376 | - by Eva Luator | |
377 | ||
378 | Memoization of variables and special forms is done while executing | |
379 | the code for the first time. As long as there is only one thread | |
380 | everything is fine, but as soon as two threads execute the same | |
381 | code concurrently `for the first time' they can come into conflict. | |
382 | ||
383 | This memoization includes rewriting variable references into more | |
384 | efficient forms and expanding macros. Furthermore, macro expansion | |
385 | includes `compiling' special forms like `let', `cond', etc. into | |
386 | tree-code instructions. | |
387 | ||
388 | There shouldn't normally be a problem with memoizing local and | |
904a077d | 389 | global variable references (into ilocs and variables), because all |
f8769b1d MV |
390 | threads will mutate the code in *exactly* the same way and (if I |
391 | read the C code correctly) it is not possible to observe a half-way | |
392 | mutated cons cell. The lookup procedure can handle this | |
393 | transparently without any critical sections. | |
394 | ||
395 | It is different with macro expansion, because macro expansion | |
396 | happens outside of the lookup procedure and can't be | |
904a077d MV |
397 | undone. Therefore the lookup procedure can't cope with it. It has |
398 | to indicate failure when it detects a lost race and hope that the | |
399 | caller can handle it. Luckily, it turns out that this is the case. | |
f8769b1d | 400 | |
904a077d | 401 | An example to illustrate this: Suppose that the following form will |
f8769b1d MV |
402 | be memoized concurrently by two threads |
403 | ||
404 | (let ((x 12)) x) | |
405 | ||
406 | Let's first examine the lookup of X in the body. The first thread | |
407 | decides that it has to find the symbol "x" in the environment and | |
408 | starts to scan it. Then the other thread takes over and actually | |
409 | overtakes the first. It looks up "x" and substitutes an | |
410 | appropriate iloc for it. Now the first thread continues and | |
411 | completes its lookup. It comes to exactly the same conclusions as | |
412 | the second one and could - without much ado - just overwrite the | |
413 | iloc with the same iloc. | |
414 | ||
415 | But let's see what will happen when the race occurs while looking | |
416 | up the symbol "let" at the start of the form. It could happen that | |
417 | the second thread interrupts the lookup of the first thread and not | |
904a077d MV |
418 | only substitutes a variable for it but goes right ahead and |
419 | replaces it with the compiled form (#@let* (x 12) x). Now, when | |
420 | the first thread completes its lookup, it would replace the #@let* | |
421 | with a variable containing the "let" binding, effectively reverting | |
422 | the form to (let (x 12) x). This is wrong. It has to detect that | |
423 | it has lost the race and the evaluator has to reconsider the | |
424 | changed form completely. | |
f8769b1d MV |
425 | |
426 | This race condition could be resolved with some kind of traffic | |
427 | light (like mutexes) around scm_lookupcar, but I think that it is | |
428 | best to avoid them in this case. They would serialize memoization | |
429 | completely and because lookup involves calling arbitrary Scheme | |
430 | code (via the lookup-thunk), threads could be blocked for an | |
431 | arbitrary amount of time or even deadlock. But with the current | |
432 | solution a lot of unnecessary work is potentially done. */ | |
433 | ||
9aa82b39 | 434 | /* SCM_LOOKUPCAR1 is what SCM_LOOKUPCAR used to be but is allowed to |
f8769b1d MV |
435 | return NULL to indicate a failed lookup due to some race conditions |
436 | between threads. This only happens when VLOC is the first cell of | |
437 | a special form that will eventually be memoized (like `let', etc.) | |
438 | In that case the whole lookup is bogus and the caller has to | |
439 | reconsider the complete special form. | |
440 | ||
441 | SCM_LOOKUPCAR is still there, of course. It just calls | |
de513fa0 | 442 | SCM_LOOKUPCAR1 and aborts on receiving NULL. So SCM_LOOKUPCAR |
f8769b1d MV |
443 | should only be called when it is known that VLOC is not the first |
444 | pair of a special form. Otherwise, use SCM_LOOKUPCAR1 and check | |
26d5b9b4 MD |
445 | for NULL. I think I've found the only places where this |
446 | applies. */ | |
f8769b1d | 447 | |
f25f761d GH |
448 | SCM_SYMBOL (scm_unbound_variable_key, "unbound-variable"); |
449 | ||
8ecf1f13 | 450 | static SCM * |
26d5b9b4 | 451 | scm_lookupcar1 (SCM vloc, SCM genv, int check) |
0f2d19dd JB |
452 | { |
453 | SCM env = genv; | |
e3173f93 | 454 | register SCM *al, fl, var = SCM_CAR (vloc); |
0f2d19dd | 455 | register SCM iloc = SCM_ILOC00; |
0f2d19dd JB |
456 | for (; SCM_NIMP (env); env = SCM_CDR (env)) |
457 | { | |
790071cd | 458 | if (!SCM_CONSP (SCM_CAR (env))) |
0f2d19dd | 459 | break; |
a23afe53 | 460 | al = SCM_CARLOC (env); |
0f2d19dd JB |
461 | for (fl = SCM_CAR (*al); SCM_NIMP (fl); fl = SCM_CDR (fl)) |
462 | { | |
01f11e02 | 463 | if (!SCM_CONSP (fl)) |
33b97402 | 464 | { |
cf498326 | 465 | if (SCM_EQ_P (fl, var)) |
0f2d19dd | 466 | { |
cf498326 | 467 | if (! SCM_EQ_P (SCM_CAR (vloc), var)) |
f8769b1d | 468 | goto race; |
3201d763 | 469 | SCM_SET_CELL_WORD_0 (vloc, SCM_UNPACK (iloc) + SCM_ICDR); |
a23afe53 | 470 | return SCM_CDRLOC (*al); |
0f2d19dd | 471 | } |
33b97402 MD |
472 | else |
473 | break; | |
474 | } | |
a23afe53 | 475 | al = SCM_CDRLOC (*al); |
cf498326 | 476 | if (SCM_EQ_P (SCM_CAR (fl), var)) |
0f2d19dd | 477 | { |
0f2d19dd JB |
478 | if (SCM_UNBNDP (SCM_CAR (*al))) |
479 | { | |
480 | env = SCM_EOL; | |
481 | goto errout; | |
482 | } | |
c6772927 | 483 | if (!SCM_EQ_P (SCM_CAR (vloc), var)) |
f8769b1d | 484 | goto race; |
a23afe53 | 485 | SCM_SETCAR (vloc, iloc); |
a23afe53 | 486 | return SCM_CARLOC (*al); |
0f2d19dd | 487 | } |
3201d763 | 488 | iloc = SCM_PACK (SCM_UNPACK (iloc) + SCM_IDINC); |
0f2d19dd | 489 | } |
3201d763 | 490 | iloc = SCM_PACK ((~SCM_IDSTMSK) & (SCM_UNPACK(iloc) + SCM_IFRINC)); |
0f2d19dd JB |
491 | } |
492 | { | |
86d31dfe | 493 | SCM top_thunk, real_var; |
790071cd | 494 | if (SCM_NIMP (env)) |
0f2d19dd | 495 | { |
86d31dfe MV |
496 | top_thunk = SCM_CAR (env); /* env now refers to a |
497 | top level env thunk */ | |
0f2d19dd JB |
498 | env = SCM_CDR (env); |
499 | } | |
500 | else | |
501 | top_thunk = SCM_BOOL_F; | |
86d31dfe MV |
502 | real_var = scm_sym2var (var, top_thunk, SCM_BOOL_F); |
503 | if (SCM_FALSEP (real_var)) | |
0f2d19dd | 504 | goto errout; |
86d31dfe | 505 | |
01f11e02 | 506 | if (!SCM_NULLP (env) || SCM_UNBNDP (SCM_VARIABLE_REF (real_var))) |
86d31dfe MV |
507 | { |
508 | errout: | |
86d31dfe MV |
509 | if (check) |
510 | { | |
511 | if (SCM_NULLP (env)) | |
512 | scm_error (scm_unbound_variable_key, NULL, | |
513 | "Unbound variable: ~S", | |
8ea46249 | 514 | scm_list_1 (var), SCM_BOOL_F); |
86d31dfe MV |
515 | else |
516 | scm_misc_error (NULL, "Damaged environment: ~S", | |
8ea46249 | 517 | scm_list_1 (var)); |
86d31dfe MV |
518 | } |
519 | else | |
520 | { | |
521 | /* A variable could not be found, but we shall | |
522 | not throw an error. */ | |
523 | static SCM undef_object = SCM_UNDEFINED; | |
524 | return &undef_object; | |
525 | } | |
09e4d064 | 526 | } |
86d31dfe | 527 | |
c6772927 | 528 | if (!SCM_EQ_P (SCM_CAR (vloc), var)) |
86d31dfe MV |
529 | { |
530 | /* Some other thread has changed the very cell we are working | |
531 | on. In effect, it must have done our job or messed it up | |
532 | completely. */ | |
533 | race: | |
534 | var = SCM_CAR (vloc); | |
d22a0ea1 MV |
535 | if (SCM_VARIABLEP (var)) |
536 | return SCM_VARIABLE_LOC (var); | |
86d31dfe MV |
537 | if (SCM_ITAG7 (var) == SCM_ITAG7 (SCM_ILOC00)) |
538 | return scm_ilookup (var, genv); | |
904a077d | 539 | /* We can't cope with anything else than variables and ilocs. When |
86d31dfe MV |
540 | a special form has been memoized (i.e. `let' into `#@let') we |
541 | return NULL and expect the calling function to do the right | |
542 | thing. For the evaluator, this means going back and redoing | |
543 | the dispatch on the car of the form. */ | |
544 | return NULL; | |
545 | } | |
f8769b1d | 546 | |
d22a0ea1 | 547 | SCM_SETCAR (vloc, real_var); |
86d31dfe MV |
548 | return SCM_VARIABLE_LOC (real_var); |
549 | } | |
0f2d19dd JB |
550 | } |
551 | ||
f8769b1d | 552 | SCM * |
6e8d25a6 | 553 | scm_lookupcar (SCM vloc, SCM genv, int check) |
f8769b1d | 554 | { |
26d5b9b4 | 555 | SCM *loc = scm_lookupcar1 (vloc, genv, check); |
f8769b1d MV |
556 | if (loc == NULL) |
557 | abort (); | |
558 | return loc; | |
559 | } | |
f8769b1d | 560 | |
2a6f7afe DH |
561 | /* Return true if the symbol is - from the point of view of a macro |
562 | * transformer - a literal in the sense specified in chapter "pattern | |
563 | * language" of R5RS. In the code below, however, we don't match the | |
564 | * definition of R5RS exactly: It returns true if the identifier has no | |
565 | * binding or if it is a syntactic keyword. */ | |
566 | static int | |
567 | literal_p (const SCM symbol, const SCM env) | |
568 | { | |
569 | const SCM x = scm_cons (symbol, SCM_UNDEFINED); | |
570 | const SCM value = *scm_lookupcar (x, env, 0); | |
571 | if (SCM_UNBNDP (value) || SCM_MACROP (value)) | |
572 | return 1; | |
573 | else | |
574 | return 0; | |
575 | } | |
576 | ||
0f2d19dd | 577 | #define unmemocar scm_unmemocar |
1cc91f1b | 578 | |
86d31dfe MV |
579 | SCM_SYMBOL (sym_three_question_marks, "???"); |
580 | ||
0f2d19dd | 581 | SCM |
6e8d25a6 | 582 | scm_unmemocar (SCM form, SCM env) |
0f2d19dd | 583 | { |
302c12b4 | 584 | if (!SCM_CONSP (form)) |
0f2d19dd | 585 | return form; |
302c12b4 | 586 | else |
d22a0ea1 | 587 | { |
302c12b4 DH |
588 | SCM c = SCM_CAR (form); |
589 | if (SCM_VARIABLEP (c)) | |
590 | { | |
591 | SCM sym = scm_module_reverse_lookup (scm_env_module (env), c); | |
592 | if (SCM_FALSEP (sym)) | |
593 | sym = sym_three_question_marks; | |
594 | SCM_SETCAR (form, sym); | |
595 | } | |
302c12b4 DH |
596 | else if (SCM_ILOCP (c)) |
597 | { | |
598 | unsigned long int ir; | |
599 | ||
600 | for (ir = SCM_IFRAME (c); ir != 0; --ir) | |
601 | env = SCM_CDR (env); | |
602 | env = SCM_CAAR (env); | |
603 | for (ir = SCM_IDIST (c); ir != 0; --ir) | |
604 | env = SCM_CDR (env); | |
605 | SCM_SETCAR (form, SCM_ICDRP (c) ? env : SCM_CAR (env)); | |
606 | } | |
302c12b4 DH |
607 | return form; |
608 | } | |
0f2d19dd JB |
609 | } |
610 | ||
1cc91f1b | 611 | |
0f2d19dd | 612 | SCM |
6e8d25a6 | 613 | scm_eval_car (SCM pair, SCM env) |
0f2d19dd | 614 | { |
6cb702da | 615 | return SCM_XEVALCAR (pair, env); |
0f2d19dd JB |
616 | } |
617 | ||
618 | \f | |
619 | /* | |
620 | * The following rewrite expressions and | |
621 | * some memoized forms have different syntax | |
622 | */ | |
623 | ||
85db4a2c DH |
624 | SCM_GLOBAL_SYMBOL (scm_sym_arrow, "=>"); |
625 | SCM_GLOBAL_SYMBOL (scm_sym_else, "else"); | |
626 | SCM_GLOBAL_SYMBOL (scm_sym_unquote, "unquote"); | |
627 | SCM_GLOBAL_SYMBOL (scm_sym_uq_splicing, "unquote-splicing"); | |
81123e6d | 628 | |
85db4a2c DH |
629 | SCM_GLOBAL_SYMBOL (scm_sym_enter_frame, "enter-frame"); |
630 | SCM_GLOBAL_SYMBOL (scm_sym_apply_frame, "apply-frame"); | |
631 | SCM_GLOBAL_SYMBOL (scm_sym_exit_frame, "exit-frame"); | |
632 | SCM_GLOBAL_SYMBOL (scm_sym_trace, "trace"); | |
0f2d19dd | 633 | |
0f2d19dd | 634 | |
26d5b9b4 MD |
635 | /* Check that the body denoted by XORIG is valid and rewrite it into |
636 | its internal form. The internal form of a body is just the body | |
637 | itself, but prefixed with an ISYM that denotes to what kind of | |
638 | outer construct this body belongs. A lambda body starts with | |
639 | SCM_IM_LAMBDA, for example, a body of a let starts with SCM_IM_LET, | |
640 | etc. The one exception is a body that belongs to a letrec that has | |
641 | been formed by rewriting internal defines: it starts with | |
642 | SCM_IM_DEFINE. */ | |
643 | ||
644 | /* XXX - Besides controlling the rewriting of internal defines, the | |
645 | additional ISYM could be used for improved error messages. | |
646 | This is not done yet. */ | |
647 | ||
648 | static SCM | |
6e8d25a6 | 649 | scm_m_body (SCM op, SCM xorig, const char *what) |
26d5b9b4 | 650 | { |
e90c3a89 | 651 | SCM_ASSYNT (scm_ilength (xorig) >= 1, s_body, what); |
26d5b9b4 MD |
652 | |
653 | /* Don't add another ISYM if one is present already. */ | |
654 | if (SCM_ISYMP (SCM_CAR (xorig))) | |
655 | return xorig; | |
656 | ||
657 | /* Retain possible doc string. */ | |
44d3cb0d | 658 | if (!SCM_CONSP (SCM_CAR (xorig))) |
26d5b9b4 | 659 | { |
8ea46249 | 660 | if (!SCM_NULLP (SCM_CDR (xorig))) |
26d5b9b4 | 661 | return scm_cons (SCM_CAR (xorig), |
8ea46249 | 662 | scm_m_body (op, SCM_CDR (xorig), what)); |
26d5b9b4 MD |
663 | return xorig; |
664 | } | |
665 | ||
ab66ae47 | 666 | return scm_cons (op, xorig); |
26d5b9b4 MD |
667 | } |
668 | ||
1cc91f1b | 669 | |
9fbee57e | 670 | /* Start of the memoizers for the standard R5RS builtin macros. */ |
0f2d19dd JB |
671 | |
672 | ||
3b88ed2a | 673 | SCM_SYNTAX (s_and, "and", scm_i_makbimacro, scm_m_and); |
8ea46249 | 674 | SCM_GLOBAL_SYMBOL (scm_sym_and, s_and); |
1cc91f1b | 675 | |
8ea46249 | 676 | SCM |
e6729603 | 677 | scm_m_and (SCM expr, SCM env SCM_UNUSED) |
0f2d19dd | 678 | { |
e6729603 DH |
679 | const SCM cdr_expr = SCM_CDR (expr); |
680 | const long length = scm_ilength (cdr_expr); | |
681 | ||
682 | ASSERT_SYNTAX (length >= 0, s_bad_expression, expr); | |
683 | ||
684 | if (length == 0) | |
685 | { | |
686 | /* Special case: (and) is replaced by #t. */ | |
687 | return SCM_BOOL_T; | |
688 | } | |
0f2d19dd | 689 | else |
e6729603 DH |
690 | { |
691 | SCM_SETCAR (expr, SCM_IM_AND); | |
692 | return expr; | |
693 | } | |
0f2d19dd JB |
694 | } |
695 | ||
1cc91f1b | 696 | |
3b88ed2a | 697 | SCM_SYNTAX (s_begin, "begin", scm_i_makbimacro, scm_m_begin); |
9fbee57e | 698 | SCM_GLOBAL_SYMBOL (scm_sym_begin, s_begin); |
8ea46249 DH |
699 | |
700 | SCM | |
2a6f7afe | 701 | scm_m_begin (SCM expr, SCM env SCM_UNUSED) |
0f2d19dd | 702 | { |
2a6f7afe DH |
703 | const SCM cdr_expr = SCM_CDR (expr); |
704 | ||
705 | ASSERT_SYNTAX (scm_ilength (cdr_expr) >= 0, s_bad_expression, expr); | |
706 | ||
707 | SCM_SETCAR (expr, SCM_IM_BEGIN); | |
708 | return expr; | |
0f2d19dd JB |
709 | } |
710 | ||
711 | ||
3b88ed2a | 712 | SCM_SYNTAX (s_case, "case", scm_i_makbimacro, scm_m_case); |
8ea46249 | 713 | SCM_GLOBAL_SYMBOL (scm_sym_case, s_case); |
1cc91f1b | 714 | |
8ea46249 | 715 | SCM |
2a6f7afe | 716 | scm_m_case (SCM expr, SCM env) |
0f2d19dd | 717 | { |
8ea46249 | 718 | SCM clauses; |
2a6f7afe DH |
719 | SCM all_labels = SCM_EOL; |
720 | ||
721 | /* Check, whether 'else is a literal, i. e. not bound to a value. */ | |
722 | const int else_literal_p = literal_p (scm_sym_else, env); | |
723 | ||
724 | const SCM cdr_expr = SCM_CDR (expr); | |
725 | ASSERT_SYNTAX (scm_ilength (cdr_expr) >= 0, s_bad_expression, expr); | |
726 | ASSERT_SYNTAX (scm_ilength (cdr_expr) >= 2, s_missing_clauses, expr); | |
727 | ||
728 | clauses = SCM_CDR (cdr_expr); | |
8ea46249 | 729 | while (!SCM_NULLP (clauses)) |
0f2d19dd | 730 | { |
2a6f7afe DH |
731 | SCM labels; |
732 | ||
733 | const SCM clause = SCM_CAR (clauses); | |
734 | ASSERT_SYNTAX_2 (scm_ilength (clause) >= 2, | |
735 | s_bad_case_clause, clause, expr); | |
736 | ||
737 | labels = SCM_CAR (clause); | |
738 | if (SCM_CONSP (labels)) | |
739 | { | |
740 | ASSERT_SYNTAX_2 (scm_ilength (labels) >= 0, | |
741 | s_bad_case_labels, labels, expr); | |
742 | all_labels = scm_append_x (scm_list_2 (labels, all_labels)); | |
743 | } | |
58a2510b DH |
744 | else if (SCM_NULLP (labels)) |
745 | { | |
746 | /* The list of labels is empty. According to R5RS this is allowed. | |
747 | * It means that the sequence of expressions will never be executed. | |
748 | * Therefore, as an optimization, we could remove the whole | |
749 | * clause. */ | |
750 | } | |
2a6f7afe DH |
751 | else |
752 | { | |
753 | ASSERT_SYNTAX_2 (SCM_EQ_P (labels, scm_sym_else) && else_literal_p, | |
754 | s_bad_case_labels, labels, expr); | |
755 | ASSERT_SYNTAX_2 (SCM_NULLP (SCM_CDR (clauses)), | |
756 | s_extra_case_clause, SCM_CDR (clauses), expr); | |
757 | } | |
758 | ||
759 | /* build the new clause */ | |
760 | if (SCM_EQ_P (labels, scm_sym_else)) | |
761 | SCM_SETCAR (clause, SCM_IM_ELSE); | |
762 | ||
8ea46249 | 763 | clauses = SCM_CDR (clauses); |
0f2d19dd | 764 | } |
2a6f7afe DH |
765 | |
766 | /* Check whether all case labels are distinct. */ | |
767 | for (; !SCM_NULLP (all_labels); all_labels = SCM_CDR (all_labels)) | |
768 | { | |
769 | const SCM label = SCM_CAR (all_labels); | |
770 | SCM label_idx = SCM_CDR (all_labels); | |
771 | for (; !SCM_NULLP (label_idx); label_idx = SCM_CDR (label_idx)) | |
772 | { | |
773 | ASSERT_SYNTAX_2 (!SCM_EQ_P (SCM_CAR (label_idx), label), | |
774 | s_duplicate_case_label, label, expr); | |
775 | } | |
776 | } | |
777 | ||
778 | SCM_SETCAR (expr, SCM_IM_CASE); | |
779 | return expr; | |
0f2d19dd JB |
780 | } |
781 | ||
782 | ||
3b88ed2a | 783 | SCM_SYNTAX (s_cond, "cond", scm_i_makbimacro, scm_m_cond); |
8ea46249 | 784 | SCM_GLOBAL_SYMBOL (scm_sym_cond, s_cond); |
1cc91f1b | 785 | |
8ea46249 | 786 | SCM |
e81d98ec | 787 | scm_m_cond (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 788 | { |
8ea46249 DH |
789 | SCM cdrx = SCM_CDR (xorig); |
790 | SCM clauses = cdrx; | |
e90c3a89 | 791 | SCM_ASSYNT (scm_ilength (clauses) >= 1, s_clauses, s_cond); |
8ea46249 | 792 | while (!SCM_NULLP (clauses)) |
0f2d19dd | 793 | { |
8ea46249 DH |
794 | SCM clause = SCM_CAR (clauses); |
795 | long len = scm_ilength (clause); | |
e90c3a89 | 796 | SCM_ASSYNT (len >= 1, s_clauses, s_cond); |
8ea46249 | 797 | if (SCM_EQ_P (scm_sym_else, SCM_CAR (clause))) |
0f2d19dd | 798 | { |
8ea46249 DH |
799 | int last_clause_p = SCM_NULLP (SCM_CDR (clauses)); |
800 | SCM_ASSYNT (len >= 2 && last_clause_p, "bad ELSE clause", s_cond); | |
0f2d19dd | 801 | } |
8ea46249 DH |
802 | else if (len >= 2 && SCM_EQ_P (scm_sym_arrow, SCM_CADR (clause))) |
803 | { | |
804 | SCM_ASSYNT (len > 2, "missing recipient", s_cond); | |
805 | SCM_ASSYNT (len == 3, "bad recipient", s_cond); | |
806 | } | |
807 | clauses = SCM_CDR (clauses); | |
0f2d19dd | 808 | } |
3a3111a8 | 809 | return scm_cons (SCM_IM_COND, cdrx); |
0f2d19dd JB |
810 | } |
811 | ||
1cc91f1b | 812 | |
3b88ed2a | 813 | SCM_SYNTAX(s_define, "define", scm_i_makbimacro, scm_m_define); |
9fbee57e | 814 | SCM_GLOBAL_SYMBOL(scm_sym_define, s_define); |
5280aaca | 815 | |
9fbee57e DH |
816 | /* Guile provides an extension to R5RS' define syntax to represent function |
817 | * currying in a compact way. With this extension, it is allowed to write | |
818 | * (define <nested-variable> <body>), where <nested-variable> has of one of | |
819 | * the forms (<nested-variable> <formals>), (<nested-variable> . <formal>), | |
820 | * (<variable> <formals>) or (<variable> . <formal>). As in R5RS, <formals> | |
821 | * should be either a sequence of zero or more variables, or a sequence of one | |
822 | * or more variables followed by a space-delimited period and another | |
823 | * variable. Each level of argument nesting wraps the <body> within another | |
824 | * lambda expression. For example, the following forms are allowed, each one | |
825 | * followed by an equivalent, more explicit implementation. | |
826 | * Example 1: | |
827 | * (define ((a b . c) . d) <body>) is equivalent to | |
828 | * (define a (lambda (b . c) (lambda d <body>))) | |
829 | * Example 2: | |
830 | * (define (((a) b) c . d) <body>) is equivalent to | |
831 | * (define a (lambda () (lambda (b) (lambda (c . d) <body>)))) | |
832 | */ | |
833 | /* Dirk:FIXME:: We should provide an implementation for 'define' in the R5RS | |
834 | * module that does not implement this extension. */ | |
835 | SCM | |
836 | scm_m_define (SCM x, SCM env) | |
5280aaca | 837 | { |
9fbee57e DH |
838 | SCM name; |
839 | x = SCM_CDR (x); | |
e90c3a89 | 840 | SCM_ASSYNT (scm_ilength (x) >= 2, s_expression, s_define); |
9fbee57e DH |
841 | name = SCM_CAR (x); |
842 | x = SCM_CDR (x); | |
843 | while (SCM_CONSP (name)) | |
5280aaca | 844 | { |
9fbee57e DH |
845 | /* This while loop realizes function currying by variable nesting. */ |
846 | SCM formals = SCM_CDR (name); | |
847 | x = scm_list_1 (scm_cons2 (scm_sym_lambda, formals, x)); | |
848 | name = SCM_CAR (name); | |
5280aaca | 849 | } |
e90c3a89 DH |
850 | SCM_ASSYNT (SCM_SYMBOLP (name), s_variable, s_define); |
851 | SCM_ASSYNT (scm_ilength (x) == 1, s_expression, s_define); | |
9fbee57e | 852 | if (SCM_TOP_LEVEL (env)) |
0f2d19dd | 853 | { |
9fbee57e DH |
854 | SCM var; |
855 | x = scm_eval_car (x, env); | |
856 | if (SCM_REC_PROCNAMES_P) | |
857 | { | |
858 | SCM tmp = x; | |
859 | while (SCM_MACROP (tmp)) | |
860 | tmp = SCM_MACRO_CODE (tmp); | |
861 | if (SCM_CLOSUREP (tmp) | |
862 | /* Only the first definition determines the name. */ | |
863 | && SCM_FALSEP (scm_procedure_property (tmp, scm_sym_name))) | |
864 | scm_set_procedure_property_x (tmp, scm_sym_name, name); | |
865 | } | |
866 | var = scm_sym2var (name, scm_env_top_level (env), SCM_BOOL_T); | |
867 | SCM_VARIABLE_SET (var, x); | |
868 | return SCM_UNSPECIFIED; | |
26d5b9b4 | 869 | } |
9fbee57e DH |
870 | else |
871 | return scm_cons2 (SCM_IM_DEFINE, name, x); | |
0f2d19dd JB |
872 | } |
873 | ||
874 | ||
3b88ed2a | 875 | SCM_SYNTAX (s_delay, "delay", scm_i_makbimacro, scm_m_delay); |
9fbee57e | 876 | SCM_GLOBAL_SYMBOL (scm_sym_delay, s_delay); |
1cc91f1b | 877 | |
9fbee57e DH |
878 | /* Promises are implemented as closures with an empty parameter list. Thus, |
879 | * (delay <expression>) is transformed into (#@delay '() <expression>), where | |
880 | * the empty list represents the empty parameter list. This representation | |
881 | * allows for easy creation of the closure during evaluation. */ | |
8ea46249 | 882 | SCM |
9fbee57e | 883 | scm_m_delay (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 884 | { |
e90c3a89 | 885 | SCM_ASSYNT (scm_ilength (xorig) == 2, s_expression, s_delay); |
9fbee57e | 886 | return scm_cons2 (SCM_IM_DELAY, SCM_EOL, SCM_CDR (xorig)); |
0f2d19dd JB |
887 | } |
888 | ||
8ea46249 | 889 | |
302c12b4 DH |
890 | /* DO gets the most radically altered syntax. The order of the vars is |
891 | * reversed here. In contrast, the order of the inits and steps is reversed | |
892 | * during the evaluation: | |
893 | ||
0f2d19dd JB |
894 | (do ((<var1> <init1> <step1>) |
895 | (<var2> <init2>) | |
896 | ... ) | |
897 | (<test> <return>) | |
898 | <body>) | |
302c12b4 | 899 | |
0f2d19dd | 900 | ;; becomes |
302c12b4 | 901 | |
e681d187 DH |
902 | (#@do (<init1> <init2> ... <initn>) |
903 | (varn ... var2 var1) | |
0f2d19dd JB |
904 | (<test> <return>) |
905 | (<body>) | |
906 | <step1> <step2> ... <stepn>) ;; missing steps replaced by var | |
302c12b4 | 907 | */ |
0f2d19dd | 908 | |
3b88ed2a | 909 | SCM_SYNTAX(s_do, "do", scm_i_makbimacro, scm_m_do); |
2f0d1375 | 910 | SCM_GLOBAL_SYMBOL(scm_sym_do, s_do); |
1cc91f1b | 911 | |
0f2d19dd | 912 | SCM |
e81d98ec | 913 | scm_m_do (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 914 | { |
8ea46249 DH |
915 | SCM bindings; |
916 | SCM x = SCM_CDR (xorig); | |
917 | SCM vars = SCM_EOL; | |
918 | SCM inits = SCM_EOL; | |
919 | SCM *initloc = &inits; | |
920 | SCM steps = SCM_EOL; | |
921 | SCM *steploc = &steps; | |
e90c3a89 | 922 | SCM_ASSYNT (scm_ilength (x) >= 2, s_test, "do"); |
8ea46249 | 923 | bindings = SCM_CAR (x); |
e90c3a89 | 924 | SCM_ASSYNT (scm_ilength (bindings) >= 0, s_bindings, "do"); |
8ea46249 | 925 | while (!SCM_NULLP (bindings)) |
0f2d19dd | 926 | { |
302c12b4 DH |
927 | SCM binding = SCM_CAR (bindings); |
928 | long len = scm_ilength (binding); | |
e90c3a89 | 929 | SCM_ASSYNT (len == 2 || len == 3, s_bindings, "do"); |
302c12b4 DH |
930 | { |
931 | SCM name = SCM_CAR (binding); | |
932 | SCM init = SCM_CADR (binding); | |
933 | SCM step = (len == 2) ? name : SCM_CADDR (binding); | |
e90c3a89 | 934 | SCM_ASSYNT (SCM_SYMBOLP (name), s_variable, "do"); |
302c12b4 DH |
935 | vars = scm_cons (name, vars); |
936 | *initloc = scm_list_1 (init); | |
937 | initloc = SCM_CDRLOC (*initloc); | |
938 | *steploc = scm_list_1 (step); | |
939 | steploc = SCM_CDRLOC (*steploc); | |
940 | bindings = SCM_CDR (bindings); | |
941 | } | |
0f2d19dd JB |
942 | } |
943 | x = SCM_CDR (x); | |
e90c3a89 | 944 | SCM_ASSYNT (scm_ilength (SCM_CAR (x)) >= 1, s_test, "do"); |
0f2d19dd | 945 | x = scm_cons2 (SCM_CAR (x), SCM_CDR (x), steps); |
e681d187 | 946 | x = scm_cons2 (inits, vars, x); |
3a3111a8 | 947 | return scm_cons (SCM_IM_DO, x); |
0f2d19dd JB |
948 | } |
949 | ||
b8229a3b | 950 | |
3b88ed2a | 951 | SCM_SYNTAX (s_if, "if", scm_i_makbimacro, scm_m_if); |
9fbee57e | 952 | SCM_GLOBAL_SYMBOL (scm_sym_if, s_if); |
b8229a3b | 953 | |
9fbee57e DH |
954 | SCM |
955 | scm_m_if (SCM xorig, SCM env SCM_UNUSED) | |
0f2d19dd | 956 | { |
9fbee57e | 957 | long len = scm_ilength (SCM_CDR (xorig)); |
e90c3a89 | 958 | SCM_ASSYNT (len >= 2 && len <= 3, s_expression, s_if); |
9fbee57e | 959 | return scm_cons (SCM_IM_IF, SCM_CDR (xorig)); |
0f2d19dd JB |
960 | } |
961 | ||
302c12b4 | 962 | |
3b88ed2a | 963 | SCM_SYNTAX (s_lambda, "lambda", scm_i_makbimacro, scm_m_lambda); |
9fbee57e | 964 | SCM_GLOBAL_SYMBOL (scm_sym_lambda, s_lambda); |
0f2d19dd | 965 | |
9fbee57e DH |
966 | /* Return true if OBJ is `eq?' to one of the elements of LIST or to the |
967 | * cdr of the last cons. (Thus, LIST is not required to be a proper | |
968 | * list and OBJ can also be found in the improper ending.) */ | |
969 | static int | |
970 | scm_c_improper_memq (SCM obj, SCM list) | |
5cb22e96 | 971 | { |
9fbee57e DH |
972 | for (; SCM_CONSP (list); list = SCM_CDR (list)) |
973 | { | |
974 | if (SCM_EQ_P (SCM_CAR (list), obj)) | |
975 | return 1; | |
976 | } | |
977 | return SCM_EQ_P (list, obj); | |
5cb22e96 DH |
978 | } |
979 | ||
28d52ebb | 980 | SCM |
9fbee57e | 981 | scm_m_lambda (SCM xorig, SCM env SCM_UNUSED) |
28d52ebb | 982 | { |
9fbee57e DH |
983 | SCM formals; |
984 | SCM x = SCM_CDR (xorig); | |
28d52ebb | 985 | |
e90c3a89 | 986 | SCM_ASSYNT (SCM_CONSP (x), s_formals, s_lambda); |
1cc91f1b | 987 | |
9fbee57e DH |
988 | formals = SCM_CAR (x); |
989 | while (SCM_CONSP (formals)) | |
0f2d19dd | 990 | { |
9fbee57e | 991 | SCM formal = SCM_CAR (formals); |
e90c3a89 | 992 | SCM_ASSYNT (SCM_SYMBOLP (formal), s_formals, s_lambda); |
9fbee57e | 993 | if (scm_c_improper_memq (formal, SCM_CDR (formals))) |
e90c3a89 | 994 | scm_misc_error (s_lambda, s_duplicate_formals, SCM_EOL); |
9fbee57e | 995 | formals = SCM_CDR (formals); |
0f2d19dd | 996 | } |
9fbee57e | 997 | if (!SCM_NULLP (formals) && !SCM_SYMBOLP (formals)) |
e90c3a89 | 998 | scm_misc_error (s_lambda, s_formals, SCM_EOL); |
9fbee57e DH |
999 | |
1000 | return scm_cons2 (SCM_IM_LAMBDA, SCM_CAR (x), | |
1001 | scm_m_body (SCM_IM_LAMBDA, SCM_CDR (x), s_lambda)); | |
0f2d19dd | 1002 | } |
6dbd0af5 | 1003 | |
0f2d19dd | 1004 | |
302c12b4 DH |
1005 | /* The bindings ((v1 i1) (v2 i2) ... (vn in)) are transformed to the lists |
1006 | * (vn ... v2 v1) and (i1 i2 ... in). That is, the list of variables is | |
1007 | * reversed here, the list of inits gets reversed during evaluation. */ | |
1008 | static void | |
1009 | transform_bindings (SCM bindings, SCM *rvarloc, SCM *initloc, const char *what) | |
0f2d19dd | 1010 | { |
302c12b4 DH |
1011 | SCM rvars = SCM_EOL; |
1012 | *rvarloc = SCM_EOL; | |
1013 | *initloc = SCM_EOL; | |
1014 | ||
e90c3a89 | 1015 | SCM_ASSYNT (scm_ilength (bindings) >= 1, s_bindings, what); |
0f2d19dd | 1016 | |
0f2d19dd JB |
1017 | do |
1018 | { | |
302c12b4 | 1019 | SCM binding = SCM_CAR (bindings); |
e90c3a89 DH |
1020 | SCM_ASSYNT (scm_ilength (binding) == 2, s_bindings, what); |
1021 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (binding)), s_variable, what); | |
302c12b4 | 1022 | if (scm_c_improper_memq (SCM_CAR (binding), rvars)) |
e90c3a89 | 1023 | scm_misc_error (what, s_duplicate_bindings, SCM_EOL); |
302c12b4 DH |
1024 | rvars = scm_cons (SCM_CAR (binding), rvars); |
1025 | *initloc = scm_list_1 (SCM_CADR (binding)); | |
a23afe53 | 1026 | initloc = SCM_CDRLOC (*initloc); |
302c12b4 | 1027 | bindings = SCM_CDR (bindings); |
0f2d19dd | 1028 | } |
302c12b4 | 1029 | while (!SCM_NULLP (bindings)); |
26d5b9b4 | 1030 | |
302c12b4 | 1031 | *rvarloc = rvars; |
0f2d19dd JB |
1032 | } |
1033 | ||
302c12b4 | 1034 | |
3b88ed2a | 1035 | SCM_SYNTAX(s_let, "let", scm_i_makbimacro, scm_m_let); |
2f0d1375 | 1036 | SCM_GLOBAL_SYMBOL(scm_sym_let, s_let); |
b8229a3b | 1037 | |
302c12b4 | 1038 | SCM |
6e8d25a6 | 1039 | scm_m_let (SCM xorig, SCM env) |
0f2d19dd | 1040 | { |
302c12b4 DH |
1041 | SCM x = SCM_CDR (xorig); |
1042 | SCM temp; | |
1043 | ||
e90c3a89 | 1044 | SCM_ASSYNT (SCM_CONSP (x), s_bindings, s_let); |
302c12b4 DH |
1045 | temp = SCM_CAR (x); |
1046 | if (SCM_NULLP (temp) | |
1047 | || (scm_ilength (temp) == 1 && SCM_CONSP (SCM_CAR (temp)))) | |
26d5b9b4 MD |
1048 | { |
1049 | /* null or single binding, let* is faster */ | |
3096b33f | 1050 | SCM bindings = temp; |
302c12b4 | 1051 | SCM body = scm_m_body (SCM_IM_LET, SCM_CDR (x), s_let); |
3096b33f | 1052 | return scm_m_letstar (scm_cons2 (SCM_CAR (xorig), bindings, body), env); |
26d5b9b4 | 1053 | } |
302c12b4 | 1054 | else if (SCM_CONSP (temp)) |
26d5b9b4 | 1055 | { |
3096b33f DH |
1056 | /* plain let */ |
1057 | SCM bindings = temp; | |
302c12b4 | 1058 | SCM rvars, inits, body; |
3096b33f | 1059 | transform_bindings (bindings, &rvars, &inits, "let"); |
302c12b4 DH |
1060 | body = scm_m_body (SCM_IM_LET, SCM_CDR (x), "let"); |
1061 | return scm_cons2 (SCM_IM_LET, rvars, scm_cons (inits, body)); | |
26d5b9b4 | 1062 | } |
302c12b4 DH |
1063 | else |
1064 | { | |
1065 | /* named let: Transform (let name ((var init) ...) body ...) into | |
1066 | * ((letrec ((name (lambda (var ...) body ...))) name) init ...) */ | |
26d5b9b4 | 1067 | |
302c12b4 DH |
1068 | SCM name = temp; |
1069 | SCM vars = SCM_EOL; | |
1070 | SCM *varloc = &vars; | |
1071 | SCM inits = SCM_EOL; | |
1072 | SCM *initloc = &inits; | |
1073 | SCM bindings; | |
1074 | ||
e90c3a89 | 1075 | SCM_ASSYNT (SCM_SYMBOLP (name), s_bindings, s_let); |
302c12b4 | 1076 | x = SCM_CDR (x); |
e90c3a89 | 1077 | SCM_ASSYNT (SCM_CONSP (x), s_bindings, s_let); |
302c12b4 | 1078 | bindings = SCM_CAR (x); |
e90c3a89 | 1079 | SCM_ASSYNT (scm_ilength (bindings) >= 0, s_bindings, s_let); |
302c12b4 DH |
1080 | while (!SCM_NULLP (bindings)) |
1081 | { /* vars and inits both in order */ | |
1082 | SCM binding = SCM_CAR (bindings); | |
e90c3a89 DH |
1083 | SCM_ASSYNT (scm_ilength (binding) == 2, s_bindings, s_let); |
1084 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (binding)), s_variable, s_let); | |
302c12b4 DH |
1085 | *varloc = scm_list_1 (SCM_CAR (binding)); |
1086 | varloc = SCM_CDRLOC (*varloc); | |
1087 | *initloc = scm_list_1 (SCM_CADR (binding)); | |
1088 | initloc = SCM_CDRLOC (*initloc); | |
1089 | bindings = SCM_CDR (bindings); | |
1090 | } | |
26d5b9b4 | 1091 | |
302c12b4 DH |
1092 | { |
1093 | SCM lambda_body = scm_m_body (SCM_IM_LET, SCM_CDR (x), "let"); | |
1094 | SCM lambda_form = scm_cons2 (scm_sym_lambda, vars, lambda_body); | |
1095 | SCM rvar = scm_list_1 (name); | |
1096 | SCM init = scm_list_1 (lambda_form); | |
1097 | SCM body = scm_m_body (SCM_IM_LET, scm_list_1 (name), "let"); | |
1098 | SCM letrec = scm_cons2 (SCM_IM_LETREC, rvar, scm_cons (init, body)); | |
1099 | return scm_cons (letrec, inits); | |
1100 | } | |
1101 | } | |
0f2d19dd JB |
1102 | } |
1103 | ||
1104 | ||
3b88ed2a | 1105 | SCM_SYNTAX (s_letstar, "let*", scm_i_makbimacro, scm_m_letstar); |
9fbee57e | 1106 | SCM_GLOBAL_SYMBOL (scm_sym_letstar, s_letstar); |
1cc91f1b | 1107 | |
9fbee57e DH |
1108 | /* (let* ((v1 i1) (v2 i2) ...) body) with variables v1 .. vk and initializers |
1109 | * i1 .. ik is transformed into the form (#@let* (v1 i1 v2 i2 ...) body*). */ | |
1110 | SCM | |
1111 | scm_m_letstar (SCM xorig, SCM env SCM_UNUSED) | |
0f2d19dd | 1112 | { |
9fbee57e DH |
1113 | SCM bindings; |
1114 | SCM x = SCM_CDR (xorig); | |
1115 | SCM vars = SCM_EOL; | |
1116 | SCM *varloc = &vars; | |
0f2d19dd | 1117 | |
e90c3a89 | 1118 | SCM_ASSYNT (SCM_CONSP (x), s_bindings, s_letstar); |
9fbee57e DH |
1119 | |
1120 | bindings = SCM_CAR (x); | |
e90c3a89 | 1121 | SCM_ASSYNT (scm_ilength (bindings) >= 0, s_bindings, s_letstar); |
9fbee57e DH |
1122 | while (!SCM_NULLP (bindings)) |
1123 | { | |
1124 | SCM binding = SCM_CAR (bindings); | |
e90c3a89 DH |
1125 | SCM_ASSYNT (scm_ilength (binding) == 2, s_bindings, s_letstar); |
1126 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (binding)), s_variable, s_letstar); | |
9fbee57e DH |
1127 | *varloc = scm_list_2 (SCM_CAR (binding), SCM_CADR (binding)); |
1128 | varloc = SCM_CDRLOC (SCM_CDR (*varloc)); | |
1129 | bindings = SCM_CDR (bindings); | |
1130 | } | |
1131 | ||
1132 | return scm_cons2 (SCM_IM_LETSTAR, vars, | |
1133 | scm_m_body (SCM_IM_LETSTAR, SCM_CDR (x), s_letstar)); | |
1134 | } | |
b8229a3b | 1135 | |
0f2d19dd | 1136 | |
3b88ed2a | 1137 | SCM_SYNTAX(s_letrec, "letrec", scm_i_makbimacro, scm_m_letrec); |
9fbee57e | 1138 | SCM_GLOBAL_SYMBOL(scm_sym_letrec, s_letrec); |
1cc91f1b | 1139 | |
0f2d19dd | 1140 | SCM |
9fbee57e | 1141 | scm_m_letrec (SCM xorig, SCM env) |
0f2d19dd | 1142 | { |
9fbee57e | 1143 | SCM x = SCM_CDR (xorig); |
e90c3a89 | 1144 | SCM_ASSYNT (SCM_CONSP (x), s_bindings, s_letrec); |
9fbee57e DH |
1145 | |
1146 | if (SCM_NULLP (SCM_CAR (x))) | |
1147 | { | |
1148 | /* null binding, let* faster */ | |
1149 | SCM body = scm_m_body (SCM_IM_LETREC, SCM_CDR (x), s_letrec); | |
1150 | return scm_m_letstar (scm_cons2 (SCM_CAR (xorig), SCM_EOL, body), env); | |
1151 | } | |
1152 | else | |
1153 | { | |
1154 | SCM rvars, inits, body; | |
1155 | transform_bindings (SCM_CAR (x), &rvars, &inits, "letrec"); | |
1156 | body = scm_m_body (SCM_IM_LETREC, SCM_CDR (x), "letrec"); | |
1157 | return scm_cons2 (SCM_IM_LETREC, rvars, scm_cons (inits, body)); | |
1158 | } | |
0f2d19dd JB |
1159 | } |
1160 | ||
73b64342 | 1161 | |
3b88ed2a | 1162 | SCM_SYNTAX (s_or, "or", scm_i_makbimacro, scm_m_or); |
9fbee57e | 1163 | SCM_GLOBAL_SYMBOL (scm_sym_or, s_or); |
73b64342 MD |
1164 | |
1165 | SCM | |
9fbee57e | 1166 | scm_m_or (SCM xorig, SCM env SCM_UNUSED) |
73b64342 | 1167 | { |
c014a02e | 1168 | long len = scm_ilength (SCM_CDR (xorig)); |
e90c3a89 | 1169 | SCM_ASSYNT (len >= 0, s_test, s_or); |
9fbee57e DH |
1170 | if (len >= 1) |
1171 | return scm_cons (SCM_IM_OR, SCM_CDR (xorig)); | |
1172 | else | |
1173 | return SCM_BOOL_F; | |
73b64342 MD |
1174 | } |
1175 | ||
73b64342 | 1176 | |
9fbee57e DH |
1177 | SCM_SYNTAX (s_quasiquote, "quasiquote", scm_makacro, scm_m_quasiquote); |
1178 | SCM_GLOBAL_SYMBOL (scm_sym_quasiquote, s_quasiquote); | |
1179 | ||
1180 | /* Internal function to handle a quasiquotation: 'form' is the parameter in | |
1181 | * the call (quasiquotation form), 'env' is the environment where unquoted | |
1182 | * expressions will be evaluated, and 'depth' is the current quasiquotation | |
1183 | * nesting level and is known to be greater than zero. */ | |
1184 | static SCM | |
1185 | iqq (SCM form, SCM env, unsigned long int depth) | |
73b64342 | 1186 | { |
9fbee57e | 1187 | if (SCM_CONSP (form)) |
c96d76b8 | 1188 | { |
9fbee57e DH |
1189 | SCM tmp = SCM_CAR (form); |
1190 | if (SCM_EQ_P (tmp, scm_sym_quasiquote)) | |
1191 | { | |
1192 | SCM args = SCM_CDR (form); | |
e90c3a89 | 1193 | SCM_ASSYNT (scm_ilength (args) == 1, s_expression, s_quasiquote); |
9fbee57e DH |
1194 | return scm_list_2 (tmp, iqq (SCM_CAR (args), env, depth + 1)); |
1195 | } | |
1196 | else if (SCM_EQ_P (tmp, scm_sym_unquote)) | |
1197 | { | |
1198 | SCM args = SCM_CDR (form); | |
e90c3a89 | 1199 | SCM_ASSYNT (scm_ilength (args) == 1, s_expression, s_quasiquote); |
9fbee57e DH |
1200 | if (depth - 1 == 0) |
1201 | return scm_eval_car (args, env); | |
1202 | else | |
1203 | return scm_list_2 (tmp, iqq (SCM_CAR (args), env, depth - 1)); | |
1204 | } | |
1205 | else if (SCM_CONSP (tmp) | |
1206 | && SCM_EQ_P (SCM_CAR (tmp), scm_sym_uq_splicing)) | |
1207 | { | |
1208 | SCM args = SCM_CDR (tmp); | |
e90c3a89 | 1209 | SCM_ASSYNT (scm_ilength (args) == 1, s_expression, s_quasiquote); |
9fbee57e DH |
1210 | if (depth - 1 == 0) |
1211 | { | |
1212 | SCM list = scm_eval_car (args, env); | |
1213 | SCM rest = SCM_CDR (form); | |
1214 | SCM_ASSYNT (scm_ilength (list) >= 0, s_splicing, s_quasiquote); | |
1215 | return scm_append (scm_list_2 (list, iqq (rest, env, depth))); | |
1216 | } | |
1217 | else | |
1218 | return scm_cons (iqq (SCM_CAR (form), env, depth - 1), | |
1219 | iqq (SCM_CDR (form), env, depth)); | |
1220 | } | |
1221 | else | |
1222 | return scm_cons (iqq (SCM_CAR (form), env, depth), | |
1223 | iqq (SCM_CDR (form), env, depth)); | |
1224 | } | |
1225 | else if (SCM_VECTORP (form)) | |
c96d76b8 | 1226 | { |
9fbee57e DH |
1227 | size_t i = SCM_VECTOR_LENGTH (form); |
1228 | SCM const *const data = SCM_VELTS (form); | |
1229 | SCM tmp = SCM_EOL; | |
1230 | while (i != 0) | |
1231 | tmp = scm_cons (data[--i], tmp); | |
1232 | scm_remember_upto_here_1 (form); | |
1233 | return scm_vector (iqq (tmp, env, depth)); | |
c96d76b8 | 1234 | } |
9fbee57e DH |
1235 | else |
1236 | return form; | |
1237 | } | |
1238 | ||
1239 | SCM | |
1240 | scm_m_quasiquote (SCM xorig, SCM env) | |
1241 | { | |
1242 | SCM x = SCM_CDR (xorig); | |
e90c3a89 | 1243 | SCM_ASSYNT (scm_ilength (x) == 1, s_expression, s_quasiquote); |
9fbee57e DH |
1244 | return iqq (SCM_CAR (x), env, 1); |
1245 | } | |
1246 | ||
1247 | ||
3b88ed2a | 1248 | SCM_SYNTAX (s_quote, "quote", scm_i_makbimacro, scm_m_quote); |
9fbee57e DH |
1249 | SCM_GLOBAL_SYMBOL (scm_sym_quote, s_quote); |
1250 | ||
1251 | SCM | |
1252 | scm_m_quote (SCM xorig, SCM env SCM_UNUSED) | |
1253 | { | |
e90c3a89 | 1254 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, s_expression, s_quote); |
9fbee57e DH |
1255 | return scm_cons (SCM_IM_QUOTE, SCM_CDR (xorig)); |
1256 | } | |
1257 | ||
1258 | ||
1259 | /* Will go into the RnRS module when Guile is factorized. | |
3b88ed2a | 1260 | SCM_SYNTAX (s_set_x, "set!", scm_i_makbimacro, scm_m_set_x); */ |
9fbee57e DH |
1261 | static const char s_set_x[] = "set!"; |
1262 | SCM_GLOBAL_SYMBOL (scm_sym_set_x, s_set_x); | |
1263 | ||
1264 | SCM | |
1265 | scm_m_set_x (SCM xorig, SCM env SCM_UNUSED) | |
1266 | { | |
1267 | SCM x = SCM_CDR (xorig); | |
e90c3a89 DH |
1268 | SCM_ASSYNT (scm_ilength (x) == 2, s_expression, s_set_x); |
1269 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (x)), s_variable, s_set_x); | |
9fbee57e DH |
1270 | return scm_cons (SCM_IM_SET_X, x); |
1271 | } | |
1272 | ||
1273 | ||
1274 | /* Start of the memoizers for non-R5RS builtin macros. */ | |
1275 | ||
1276 | ||
3b88ed2a | 1277 | SCM_SYNTAX (s_atapply, "@apply", scm_i_makbimacro, scm_m_apply); |
9fbee57e DH |
1278 | SCM_GLOBAL_SYMBOL (scm_sym_atapply, s_atapply); |
1279 | SCM_GLOBAL_SYMBOL (scm_sym_apply, s_atapply + 1); | |
1280 | ||
1281 | SCM | |
1282 | scm_m_apply (SCM xorig, SCM env SCM_UNUSED) | |
1283 | { | |
e90c3a89 | 1284 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 2, s_expression, s_atapply); |
9fbee57e | 1285 | return scm_cons (SCM_IM_APPLY, SCM_CDR (xorig)); |
73b64342 MD |
1286 | } |
1287 | ||
c96d76b8 | 1288 | |
2e171178 MV |
1289 | /* (@bind ((var exp) ...) body ...) |
1290 | ||
1291 | This will assign the values of the `exp's to the global variables | |
1292 | named by `var's (symbols, not evaluated), creating them if they | |
1293 | don't exist, executes body, and then restores the previous values of | |
1294 | the `var's. Additionally, whenever control leaves body, the values | |
1295 | of the `var's are saved and restored when control returns. It is an | |
1296 | error when a symbol appears more than once among the `var's. | |
1297 | All `exp's are evaluated before any `var' is set. | |
1298 | ||
c96d76b8 | 1299 | Think of this as `let' for dynamic scope. |
2e171178 MV |
1300 | |
1301 | It is memoized into (#@bind ((var ...) . (reversed-val ...)) body ...). | |
1302 | ||
1303 | XXX - also implement `@bind*'. | |
1304 | */ | |
1305 | ||
3b88ed2a | 1306 | SCM_SYNTAX (s_atbind, "@bind", scm_i_makbimacro, scm_m_atbind); |
73b64342 MD |
1307 | |
1308 | SCM | |
1309 | scm_m_atbind (SCM xorig, SCM env) | |
1310 | { | |
1311 | SCM x = SCM_CDR (xorig); | |
2e171178 | 1312 | SCM top_level = scm_env_top_level (env); |
311f6782 | 1313 | SCM vars = SCM_EOL, var; |
2e171178 MV |
1314 | SCM exps = SCM_EOL; |
1315 | ||
e90c3a89 | 1316 | SCM_ASSYNT (scm_ilength (x) > 1, s_expression, s_atbind); |
73b64342 | 1317 | |
73b64342 MD |
1318 | x = SCM_CAR (x); |
1319 | while (SCM_NIMP (x)) | |
1320 | { | |
2e171178 MV |
1321 | SCM rest; |
1322 | SCM sym_exp = SCM_CAR (x); | |
e90c3a89 DH |
1323 | SCM_ASSYNT (scm_ilength (sym_exp) == 2, s_bindings, s_atbind); |
1324 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (sym_exp)), s_bindings, s_atbind); | |
73b64342 | 1325 | x = SCM_CDR (x); |
2e171178 | 1326 | for (rest = x; SCM_NIMP (rest); rest = SCM_CDR (rest)) |
8ea46249 | 1327 | if (SCM_EQ_P (SCM_CAR (sym_exp), SCM_CAAR (rest))) |
e90c3a89 | 1328 | scm_misc_error (s_atbind, s_duplicate_bindings, SCM_EOL); |
311f6782 MV |
1329 | /* The first call to scm_sym2var will look beyond the current |
1330 | module, while the second call wont. */ | |
1331 | var = scm_sym2var (SCM_CAR (sym_exp), top_level, SCM_BOOL_F); | |
1332 | if (SCM_FALSEP (var)) | |
1333 | var = scm_sym2var (SCM_CAR (sym_exp), top_level, SCM_BOOL_T); | |
1334 | vars = scm_cons (var, vars); | |
2e171178 | 1335 | exps = scm_cons (SCM_CADR (sym_exp), exps); |
73b64342 | 1336 | } |
2e171178 MV |
1337 | return scm_cons (SCM_IM_BIND, |
1338 | scm_cons (scm_cons (scm_reverse_x (vars, SCM_EOL), exps), | |
1339 | SCM_CDDR (xorig))); | |
73b64342 | 1340 | } |
73b64342 | 1341 | |
b0c5d67b | 1342 | |
3b88ed2a | 1343 | SCM_SYNTAX(s_atcall_cc, "@call-with-current-continuation", scm_i_makbimacro, scm_m_cont); |
9fbee57e DH |
1344 | SCM_GLOBAL_SYMBOL(scm_sym_atcall_cc, s_atcall_cc); |
1345 | ||
1346 | ||
1347 | SCM | |
1348 | scm_m_cont (SCM xorig, SCM env SCM_UNUSED) | |
b0c5d67b | 1349 | { |
9fbee57e | 1350 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, |
e90c3a89 | 1351 | s_expression, s_atcall_cc); |
9fbee57e | 1352 | return scm_cons (SCM_IM_CONT, SCM_CDR (xorig)); |
b0c5d67b | 1353 | } |
b0c5d67b DH |
1354 | |
1355 | ||
3b88ed2a | 1356 | SCM_SYNTAX (s_at_call_with_values, "@call-with-values", scm_i_makbimacro, scm_m_at_call_with_values); |
9fbee57e | 1357 | SCM_GLOBAL_SYMBOL(scm_sym_at_call_with_values, s_at_call_with_values); |
b0c5d67b DH |
1358 | |
1359 | SCM | |
9fbee57e | 1360 | scm_m_at_call_with_values (SCM xorig, SCM env SCM_UNUSED) |
b0c5d67b | 1361 | { |
9fbee57e | 1362 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 2, |
e90c3a89 | 1363 | s_expression, s_at_call_with_values); |
9fbee57e | 1364 | return scm_cons (SCM_IM_CALL_WITH_VALUES, SCM_CDR (xorig)); |
b0c5d67b | 1365 | } |
b0c5d67b DH |
1366 | |
1367 | ||
3b88ed2a | 1368 | SCM_SYNTAX (s_future, "future", scm_i_makbimacro, scm_m_future); |
9fbee57e | 1369 | SCM_GLOBAL_SYMBOL (scm_sym_future, s_future); |
a513ead3 | 1370 | |
9fbee57e DH |
1371 | /* Like promises, futures are implemented as closures with an empty |
1372 | * parameter list. Thus, (future <expression>) is transformed into | |
1373 | * (#@future '() <expression>), where the empty list represents the | |
1374 | * empty parameter list. This representation allows for easy creation | |
1375 | * of the closure during evaluation. */ | |
a513ead3 | 1376 | SCM |
9fbee57e | 1377 | scm_m_future (SCM xorig, SCM env SCM_UNUSED) |
a513ead3 | 1378 | { |
e90c3a89 | 1379 | SCM_ASSYNT (scm_ilength (xorig) == 2, s_expression, s_future); |
9fbee57e | 1380 | return scm_cons2 (SCM_IM_FUTURE, SCM_EOL, SCM_CDR (xorig)); |
a513ead3 MV |
1381 | } |
1382 | ||
9fbee57e | 1383 | |
3b88ed2a | 1384 | SCM_SYNTAX (s_gset_x, "set!", scm_i_makbimacro, scm_m_generalized_set_x); |
9fbee57e DH |
1385 | SCM_SYMBOL (scm_sym_setter, "setter"); |
1386 | ||
1387 | SCM | |
1388 | scm_m_generalized_set_x (SCM xorig, SCM env SCM_UNUSED) | |
1389 | { | |
1390 | SCM x = SCM_CDR (xorig); | |
e90c3a89 | 1391 | SCM_ASSYNT (2 == scm_ilength (x), s_expression, s_set_x); |
9fbee57e DH |
1392 | if (SCM_SYMBOLP (SCM_CAR (x))) |
1393 | return scm_cons (SCM_IM_SET_X, x); | |
1394 | else if (SCM_CONSP (SCM_CAR (x))) | |
1395 | return scm_cons (scm_list_2 (scm_sym_setter, SCM_CAAR (x)), | |
1396 | scm_append (scm_list_2 (SCM_CDAR (x), SCM_CDR (x)))); | |
1397 | else | |
e90c3a89 | 1398 | scm_misc_error (s_set_x, s_variable, SCM_EOL); |
9fbee57e DH |
1399 | } |
1400 | ||
1401 | ||
a4aa2134 | 1402 | static const char* s_atslot_ref = "@slot-ref"; |
9fbee57e | 1403 | |
a4aa2134 DH |
1404 | /* @slot-ref is bound privately in the (oop goops) module from goops.c. As |
1405 | * soon as the module system allows us to more freely create bindings in | |
1406 | * arbitrary modules during the startup phase, the code from goops.c should be | |
1407 | * moved here. */ | |
9fbee57e DH |
1408 | SCM |
1409 | scm_m_atslot_ref (SCM xorig, SCM env SCM_UNUSED) | |
1410 | #define FUNC_NAME s_atslot_ref | |
1411 | { | |
1412 | SCM x = SCM_CDR (xorig); | |
e90c3a89 | 1413 | SCM_ASSYNT (scm_ilength (x) == 2, s_expression, FUNC_NAME); |
9fbee57e DH |
1414 | SCM_VALIDATE_INUM (SCM_ARG2, SCM_CADR (x)); |
1415 | return scm_cons (SCM_IM_SLOT_REF, x); | |
1416 | } | |
1417 | #undef FUNC_NAME | |
1418 | ||
1419 | ||
a4aa2134 | 1420 | static const char* s_atslot_set_x = "@slot-set!"; |
9fbee57e | 1421 | |
a4aa2134 DH |
1422 | /* @slot-set! is bound privately in the (oop goops) module from goops.c. As |
1423 | * soon as the module system allows us to more freely create bindings in | |
1424 | * arbitrary modules during the startup phase, the code from goops.c should be | |
1425 | * moved here. */ | |
9fbee57e DH |
1426 | SCM |
1427 | scm_m_atslot_set_x (SCM xorig, SCM env SCM_UNUSED) | |
1428 | #define FUNC_NAME s_atslot_set_x | |
1429 | { | |
1430 | SCM x = SCM_CDR (xorig); | |
e90c3a89 | 1431 | SCM_ASSYNT (scm_ilength (x) == 3, s_expression, FUNC_NAME); |
9fbee57e DH |
1432 | SCM_VALIDATE_INUM (SCM_ARG2, SCM_CADR (x)); |
1433 | return scm_cons (SCM_IM_SLOT_SET_X, x); | |
1434 | } | |
1435 | #undef FUNC_NAME | |
1436 | ||
1437 | ||
1438 | #if SCM_ENABLE_ELISP | |
1439 | ||
3b88ed2a | 1440 | SCM_SYNTAX (s_nil_cond, "nil-cond", scm_i_makbimacro, scm_m_nil_cond); |
9fbee57e DH |
1441 | |
1442 | SCM | |
1443 | scm_m_nil_cond (SCM xorig, SCM env SCM_UNUSED) | |
1444 | { | |
1445 | long len = scm_ilength (SCM_CDR (xorig)); | |
e90c3a89 | 1446 | SCM_ASSYNT (len >= 1 && (len & 1) == 1, s_expression, "nil-cond"); |
9fbee57e DH |
1447 | return scm_cons (SCM_IM_NIL_COND, SCM_CDR (xorig)); |
1448 | } | |
1449 | ||
1450 | ||
3b88ed2a | 1451 | SCM_SYNTAX (s_atfop, "@fop", scm_i_makbimacro, scm_m_atfop); |
9fbee57e DH |
1452 | |
1453 | SCM | |
1454 | scm_m_atfop (SCM xorig, SCM env SCM_UNUSED) | |
1455 | { | |
1456 | SCM x = SCM_CDR (xorig), var; | |
e90c3a89 | 1457 | SCM_ASSYNT (scm_ilength (x) >= 1, s_expression, "@fop"); |
9fbee57e DH |
1458 | var = scm_symbol_fref (SCM_CAR (x)); |
1459 | /* Passing the symbol name as the `subr' arg here isn't really | |
1460 | right, but without it it can be very difficult to work out from | |
1461 | the error message which function definition was missing. In any | |
1462 | case, we shouldn't really use SCM_ASSYNT here at all, but instead | |
1463 | something equivalent to (signal void-function (list SYM)) in | |
1464 | Elisp. */ | |
1465 | SCM_ASSYNT (SCM_VARIABLEP (var), | |
1466 | "Symbol's function definition is void", | |
1467 | SCM_SYMBOL_CHARS (SCM_CAR (x))); | |
1468 | /* Support `defalias'. */ | |
1469 | while (SCM_SYMBOLP (SCM_VARIABLE_REF (var))) | |
1470 | { | |
1471 | var = scm_symbol_fref (SCM_VARIABLE_REF (var)); | |
1472 | SCM_ASSYNT (SCM_VARIABLEP (var), | |
1473 | "Symbol's function definition is void", | |
1474 | SCM_SYMBOL_CHARS (SCM_CAR (x))); | |
1475 | } | |
1476 | /* Use `var' here rather than `SCM_VARIABLE_REF (var)' because the | |
1477 | former allows for automatically picking up redefinitions of the | |
1478 | corresponding symbol. */ | |
1479 | SCM_SETCAR (x, var); | |
1480 | /* If the variable contains a procedure, leave the | |
1481 | `transformer-macro' in place so that the procedure's arguments | |
1482 | get properly transformed, and change the initial @fop to | |
1483 | SCM_IM_APPLY. */ | |
1484 | if (!SCM_MACROP (SCM_VARIABLE_REF (var))) | |
1485 | { | |
1486 | SCM_SETCAR (xorig, SCM_IM_APPLY); | |
1487 | return xorig; | |
1488 | } | |
1489 | /* Otherwise (the variable contains a macro), the arguments should | |
1490 | not be transformed, so cut the `transformer-macro' out and return | |
1491 | the resulting expression starting with the variable. */ | |
1492 | SCM_SETCDR (x, SCM_CDADR (x)); | |
1493 | return x; | |
1494 | } | |
1495 | ||
1496 | #endif /* SCM_ENABLE_ELISP */ | |
1497 | ||
1498 | ||
f58c472a DH |
1499 | /* Start of the memoizers for deprecated macros. */ |
1500 | ||
1501 | ||
1502 | #if (SCM_ENABLE_DEPRECATED == 1) | |
1503 | ||
1504 | SCM_SYNTAX (s_undefine, "undefine", scm_makacro, scm_m_undefine); | |
1505 | ||
1506 | SCM | |
1507 | scm_m_undefine (SCM x, SCM env) | |
1508 | { | |
1509 | SCM arg1 = x; | |
1510 | x = SCM_CDR (x); | |
1511 | SCM_ASSYNT (SCM_TOP_LEVEL (env), "bad placement ", s_undefine); | |
1512 | SCM_ASSYNT (SCM_CONSP (x) && SCM_NULLP (SCM_CDR (x)), | |
e90c3a89 | 1513 | s_expression, s_undefine); |
f58c472a | 1514 | x = SCM_CAR (x); |
e90c3a89 | 1515 | SCM_ASSYNT (SCM_SYMBOLP (x), s_variable, s_undefine); |
f58c472a DH |
1516 | arg1 = scm_sym2var (x, scm_env_top_level (env), SCM_BOOL_F); |
1517 | SCM_ASSYNT (!SCM_FALSEP (arg1) && !SCM_UNBNDP (SCM_VARIABLE_REF (arg1)), | |
1518 | "variable already unbound ", s_undefine); | |
1519 | SCM_VARIABLE_SET (arg1, SCM_UNDEFINED); | |
1520 | #ifdef SICP | |
1521 | return x; | |
1522 | #else | |
1523 | return SCM_UNSPECIFIED; | |
1524 | #endif | |
1525 | } | |
1526 | ||
1527 | #endif | |
1528 | ||
1529 | ||
26d5b9b4 MD |
1530 | SCM |
1531 | scm_m_expand_body (SCM xorig, SCM env) | |
1532 | { | |
22a52da1 | 1533 | SCM x = SCM_CDR (xorig), defs = SCM_EOL; |
26d5b9b4 MD |
1534 | char *what = SCM_ISYMCHARS (SCM_CAR (xorig)) + 2; |
1535 | ||
1536 | while (SCM_NIMP (x)) | |
1537 | { | |
22a52da1 DH |
1538 | SCM form = SCM_CAR (x); |
1539 | if (!SCM_CONSP (form)) | |
26d5b9b4 MD |
1540 | break; |
1541 | if (!SCM_SYMBOLP (SCM_CAR (form))) | |
1542 | break; | |
22a52da1 | 1543 | |
3a3111a8 MD |
1544 | form = scm_macroexp (scm_cons_source (form, |
1545 | SCM_CAR (form), | |
1546 | SCM_CDR (form)), | |
1547 | env); | |
26d5b9b4 | 1548 | |
cf498326 | 1549 | if (SCM_EQ_P (SCM_IM_DEFINE, SCM_CAR (form))) |
26d5b9b4 MD |
1550 | { |
1551 | defs = scm_cons (SCM_CDR (form), defs); | |
22a52da1 | 1552 | x = SCM_CDR (x); |
26d5b9b4 | 1553 | } |
22a52da1 | 1554 | else if (!SCM_IMP (defs)) |
26d5b9b4 MD |
1555 | { |
1556 | break; | |
1557 | } | |
cf498326 | 1558 | else if (SCM_EQ_P (SCM_IM_BEGIN, SCM_CAR (form))) |
26d5b9b4 | 1559 | { |
8ea46249 | 1560 | x = scm_append (scm_list_2 (SCM_CDR (form), SCM_CDR (x))); |
26d5b9b4 MD |
1561 | } |
1562 | else | |
1563 | { | |
22a52da1 | 1564 | x = scm_cons (form, SCM_CDR (x)); |
26d5b9b4 MD |
1565 | break; |
1566 | } | |
1567 | } | |
1568 | ||
302c12b4 | 1569 | if (!SCM_NULLP (defs)) |
26d5b9b4 | 1570 | { |
302c12b4 DH |
1571 | SCM rvars, inits, body, letrec; |
1572 | transform_bindings (defs, &rvars, &inits, what); | |
1573 | body = scm_m_body (SCM_IM_DEFINE, x, what); | |
1574 | letrec = scm_cons2 (SCM_IM_LETREC, rvars, scm_cons (inits, body)); | |
1575 | SCM_SETCAR (xorig, letrec); | |
1576 | SCM_SETCDR (xorig, SCM_EOL); | |
1577 | } | |
1578 | else | |
1579 | { | |
e90c3a89 | 1580 | SCM_ASSYNT (SCM_CONSP (x), s_body, what); |
302c12b4 DH |
1581 | SCM_SETCAR (xorig, SCM_CAR (x)); |
1582 | SCM_SETCDR (xorig, SCM_CDR (x)); | |
26d5b9b4 | 1583 | } |
26d5b9b4 MD |
1584 | |
1585 | return xorig; | |
1586 | } | |
1587 | ||
1588 | SCM | |
1589 | scm_macroexp (SCM x, SCM env) | |
1590 | { | |
86d31dfe | 1591 | SCM res, proc, orig_sym; |
26d5b9b4 MD |
1592 | |
1593 | /* Don't bother to produce error messages here. We get them when we | |
1594 | eventually execute the code for real. */ | |
1595 | ||
1596 | macro_tail: | |
86d31dfe MV |
1597 | orig_sym = SCM_CAR (x); |
1598 | if (!SCM_SYMBOLP (orig_sym)) | |
26d5b9b4 MD |
1599 | return x; |
1600 | ||
26d5b9b4 MD |
1601 | { |
1602 | SCM *proc_ptr = scm_lookupcar1 (x, env, 0); | |
1603 | if (proc_ptr == NULL) | |
1604 | { | |
1605 | /* We have lost the race. */ | |
1606 | goto macro_tail; | |
1607 | } | |
1608 | proc = *proc_ptr; | |
1609 | } | |
26d5b9b4 MD |
1610 | |
1611 | /* Only handle memoizing macros. `Acros' and `macros' are really | |
1612 | special forms and should not be evaluated here. */ | |
1613 | ||
3b88ed2a DH |
1614 | if (!SCM_MACROP (proc) |
1615 | || (SCM_MACRO_TYPE (proc) != 2 && !SCM_BUILTIN_MACRO_P (proc))) | |
26d5b9b4 MD |
1616 | return x; |
1617 | ||
86d31dfe | 1618 | SCM_SETCAR (x, orig_sym); /* Undo memoizing effect of lookupcar */ |
fdc28395 | 1619 | res = scm_call_2 (SCM_MACRO_CODE (proc), x, env); |
26d5b9b4 MD |
1620 | |
1621 | if (scm_ilength (res) <= 0) | |
8ea46249 | 1622 | res = scm_list_2 (SCM_IM_BEGIN, res); |
26d5b9b4 | 1623 | |
26d5b9b4 MD |
1624 | SCM_DEFER_INTS; |
1625 | SCM_SETCAR (x, SCM_CAR (res)); | |
1626 | SCM_SETCDR (x, SCM_CDR (res)); | |
1627 | SCM_ALLOW_INTS; | |
1628 | ||
1629 | goto macro_tail; | |
1630 | } | |
73b64342 | 1631 | |
a44a9715 DH |
1632 | #define SCM_BIT7(x) (127 & SCM_UNPACK (x)) |
1633 | ||
1634 | /* A function object to implement "apply" for non-closure functions. */ | |
1635 | static SCM f_apply; | |
1636 | /* An endless list consisting of #<undefined> objects: */ | |
1637 | static SCM undefineds; | |
1638 | ||
6dbd0af5 MD |
1639 | /* scm_unmemocopy takes a memoized expression together with its |
1640 | * environment and rewrites it to its original form. Thus, it is the | |
1641 | * inversion of the rewrite rules above. The procedure is not | |
1642 | * optimized for speed. It's used in scm_iprin1 when printing the | |
220ff1eb MD |
1643 | * code of a closure, in scm_procedure_source, in display_frame when |
1644 | * generating the source for a stackframe in a backtrace, and in | |
1645 | * display_expression. | |
86d31dfe | 1646 | * |
c96d76b8 | 1647 | * Unmemoizing is not a reliable process. You cannot in general |
86d31dfe MV |
1648 | * expect to get the original source back. |
1649 | * | |
1650 | * However, GOOPS currently relies on this for method compilation. | |
1651 | * This ought to change. | |
26d5b9b4 MD |
1652 | */ |
1653 | ||
8ea46249 DH |
1654 | static SCM |
1655 | build_binding_list (SCM names, SCM inits) | |
1656 | { | |
1657 | SCM bindings = SCM_EOL; | |
1658 | while (!SCM_NULLP (names)) | |
1659 | { | |
1660 | SCM binding = scm_list_2 (SCM_CAR (names), SCM_CAR (inits)); | |
1661 | bindings = scm_cons (binding, bindings); | |
1662 | names = SCM_CDR (names); | |
1663 | inits = SCM_CDR (inits); | |
1664 | } | |
1665 | return bindings; | |
1666 | } | |
1667 | ||
6dbd0af5 | 1668 | static SCM |
1bbd0b84 | 1669 | unmemocopy (SCM x, SCM env) |
6dbd0af5 MD |
1670 | { |
1671 | SCM ls, z; | |
6dbd0af5 | 1672 | SCM p; |
8c494e99 | 1673 | if (!SCM_CONSP (x)) |
6dbd0af5 | 1674 | return x; |
6dbd0af5 | 1675 | p = scm_whash_lookup (scm_source_whash, x); |
8ea46249 | 1676 | switch (SCM_ITAG7 (SCM_CAR (x))) |
6dbd0af5 | 1677 | { |
1b43d24c | 1678 | case SCM_BIT7 (SCM_IM_AND): |
2f0d1375 | 1679 | ls = z = scm_cons (scm_sym_and, SCM_UNSPECIFIED); |
6dbd0af5 | 1680 | break; |
1b43d24c | 1681 | case SCM_BIT7 (SCM_IM_BEGIN): |
2f0d1375 | 1682 | ls = z = scm_cons (scm_sym_begin, SCM_UNSPECIFIED); |
6dbd0af5 | 1683 | break; |
1b43d24c | 1684 | case SCM_BIT7 (SCM_IM_CASE): |
2f0d1375 | 1685 | ls = z = scm_cons (scm_sym_case, SCM_UNSPECIFIED); |
6dbd0af5 | 1686 | break; |
1b43d24c | 1687 | case SCM_BIT7 (SCM_IM_COND): |
2f0d1375 | 1688 | ls = z = scm_cons (scm_sym_cond, SCM_UNSPECIFIED); |
6dbd0af5 | 1689 | break; |
1b43d24c | 1690 | case SCM_BIT7 (SCM_IM_DO): |
6dbd0af5 | 1691 | { |
e681d187 DH |
1692 | /* format: (#@do (i1 ... ik) (nk nk-1 ...) (test) (body) s1 ... sk), |
1693 | * where ix is an initializer for a local variable, nx is the name of | |
8ea46249 DH |
1694 | * the local variable, test is the test clause of the do loop, body is |
1695 | * the body of the do loop and sx are the step clauses for the local | |
1696 | * variables. */ | |
1697 | SCM names, inits, test, memoized_body, steps, bindings; | |
1698 | ||
6dbd0af5 | 1699 | x = SCM_CDR (x); |
8ea46249 | 1700 | inits = scm_reverse (unmemocopy (SCM_CAR (x), env)); |
e681d187 DH |
1701 | x = SCM_CDR (x); |
1702 | names = SCM_CAR (x); | |
821f18a4 | 1703 | env = SCM_EXTEND_ENV (names, SCM_EOL, env); |
6dbd0af5 | 1704 | x = SCM_CDR (x); |
8ea46249 DH |
1705 | test = unmemocopy (SCM_CAR (x), env); |
1706 | x = SCM_CDR (x); | |
1707 | memoized_body = SCM_CAR (x); | |
1708 | x = SCM_CDR (x); | |
1709 | steps = scm_reverse (unmemocopy (x, env)); | |
1710 | ||
26d5b9b4 | 1711 | /* build transformed binding list */ |
8ea46249 DH |
1712 | bindings = SCM_EOL; |
1713 | while (!SCM_NULLP (names)) | |
6dbd0af5 | 1714 | { |
8ea46249 DH |
1715 | SCM name = SCM_CAR (names); |
1716 | SCM init = SCM_CAR (inits); | |
1717 | SCM step = SCM_CAR (steps); | |
1718 | step = SCM_EQ_P (step, name) ? SCM_EOL : scm_list_1 (step); | |
1719 | ||
1720 | bindings = scm_cons (scm_cons2 (name, init, step), bindings); | |
1721 | ||
1722 | names = SCM_CDR (names); | |
1723 | inits = SCM_CDR (inits); | |
1724 | steps = SCM_CDR (steps); | |
6dbd0af5 | 1725 | } |
8ea46249 DH |
1726 | z = scm_cons (test, SCM_UNSPECIFIED); |
1727 | ls = scm_cons2 (scm_sym_do, bindings, z); | |
1728 | ||
1729 | x = scm_cons (SCM_BOOL_F, memoized_body); | |
1730 | break; | |
1731 | } | |
1b43d24c | 1732 | case SCM_BIT7 (SCM_IM_IF): |
8ea46249 DH |
1733 | ls = z = scm_cons (scm_sym_if, SCM_UNSPECIFIED); |
1734 | break; | |
1b43d24c | 1735 | case SCM_BIT7 (SCM_IM_LET): |
8ea46249 DH |
1736 | { |
1737 | /* format: (#@let (nk nk-1 ...) (i1 ... ik) b1 ...), | |
1738 | * where nx is the name of a local variable, ix is an initializer for | |
1739 | * the local variable and by are the body clauses. */ | |
1740 | SCM names, inits, bindings; | |
1741 | ||
1742 | x = SCM_CDR (x); | |
1743 | names = SCM_CAR (x); | |
1744 | x = SCM_CDR (x); | |
1745 | inits = scm_reverse (unmemocopy (SCM_CAR (x), env)); | |
821f18a4 | 1746 | env = SCM_EXTEND_ENV (names, SCM_EOL, env); |
8ea46249 DH |
1747 | |
1748 | bindings = build_binding_list (names, inits); | |
1749 | z = scm_cons (bindings, SCM_UNSPECIFIED); | |
1750 | ls = scm_cons (scm_sym_let, z); | |
1751 | break; | |
1752 | } | |
1b43d24c | 1753 | case SCM_BIT7 (SCM_IM_LETREC): |
8ea46249 DH |
1754 | { |
1755 | /* format: (#@letrec (nk nk-1 ...) (i1 ... ik) b1 ...), | |
1756 | * where nx is the name of a local variable, ix is an initializer for | |
1757 | * the local variable and by are the body clauses. */ | |
1758 | SCM names, inits, bindings; | |
1759 | ||
1760 | x = SCM_CDR (x); | |
1761 | names = SCM_CAR (x); | |
821f18a4 | 1762 | env = SCM_EXTEND_ENV (names, SCM_EOL, env); |
8ea46249 DH |
1763 | x = SCM_CDR (x); |
1764 | inits = scm_reverse (unmemocopy (SCM_CAR (x), env)); | |
1765 | ||
1766 | bindings = build_binding_list (names, inits); | |
1767 | z = scm_cons (bindings, SCM_UNSPECIFIED); | |
1768 | ls = scm_cons (scm_sym_letrec, z); | |
6dbd0af5 MD |
1769 | break; |
1770 | } | |
1b43d24c | 1771 | case SCM_BIT7 (SCM_IM_LETSTAR): |
6dbd0af5 MD |
1772 | { |
1773 | SCM b, y; | |
1774 | x = SCM_CDR (x); | |
1775 | b = SCM_CAR (x); | |
1776 | y = SCM_EOL; | |
1777 | if SCM_IMP (b) | |
1778 | { | |
821f18a4 | 1779 | env = SCM_EXTEND_ENV (SCM_EOL, SCM_EOL, env); |
6dbd0af5 MD |
1780 | goto letstar; |
1781 | } | |
1782 | y = z = scm_acons (SCM_CAR (b), | |
1783 | unmemocar ( | |
8ea46249 | 1784 | scm_cons (unmemocopy (SCM_CADR (b), env), SCM_EOL), env), |
6dbd0af5 | 1785 | SCM_UNSPECIFIED); |
821f18a4 | 1786 | env = SCM_EXTEND_ENV (SCM_CAR (b), SCM_BOOL_F, env); |
8ea46249 | 1787 | b = SCM_CDDR (b); |
6dbd0af5 MD |
1788 | if (SCM_IMP (b)) |
1789 | { | |
1790 | SCM_SETCDR (y, SCM_EOL); | |
05b15362 DH |
1791 | z = scm_cons (y, SCM_UNSPECIFIED); |
1792 | ls = scm_cons (scm_sym_let, z); | |
6dbd0af5 MD |
1793 | break; |
1794 | } | |
1795 | do | |
1796 | { | |
a23afe53 MD |
1797 | SCM_SETCDR (z, scm_acons (SCM_CAR (b), |
1798 | unmemocar ( | |
8ea46249 | 1799 | scm_list_1 (unmemocopy (SCM_CADR (b), env)), env), |
a23afe53 MD |
1800 | SCM_UNSPECIFIED)); |
1801 | z = SCM_CDR (z); | |
821f18a4 | 1802 | env = SCM_EXTEND_ENV (SCM_CAR (b), SCM_BOOL_F, env); |
8ea46249 | 1803 | b = SCM_CDDR (b); |
6dbd0af5 | 1804 | } |
ff467021 | 1805 | while (SCM_NIMP (b)); |
a23afe53 | 1806 | SCM_SETCDR (z, SCM_EOL); |
6dbd0af5 | 1807 | letstar: |
05b15362 DH |
1808 | z = scm_cons (y, SCM_UNSPECIFIED); |
1809 | ls = scm_cons (scm_sym_letstar, z); | |
6dbd0af5 MD |
1810 | break; |
1811 | } | |
1b43d24c | 1812 | case SCM_BIT7 (SCM_IM_OR): |
2f0d1375 | 1813 | ls = z = scm_cons (scm_sym_or, SCM_UNSPECIFIED); |
6dbd0af5 | 1814 | break; |
1b43d24c | 1815 | case SCM_BIT7 (SCM_IM_LAMBDA): |
6dbd0af5 | 1816 | x = SCM_CDR (x); |
8ea46249 DH |
1817 | z = scm_cons (SCM_CAR (x), SCM_UNSPECIFIED); |
1818 | ls = scm_cons (scm_sym_lambda, z); | |
821f18a4 | 1819 | env = SCM_EXTEND_ENV (SCM_CAR (x), SCM_EOL, env); |
6dbd0af5 | 1820 | break; |
1b43d24c | 1821 | case SCM_BIT7 (SCM_IM_QUOTE): |
2f0d1375 | 1822 | ls = z = scm_cons (scm_sym_quote, SCM_UNSPECIFIED); |
6dbd0af5 | 1823 | break; |
1b43d24c | 1824 | case SCM_BIT7 (SCM_IM_SET_X): |
89efbff4 | 1825 | ls = z = scm_cons (scm_sym_set_x, SCM_UNSPECIFIED); |
6dbd0af5 | 1826 | break; |
1b43d24c | 1827 | case SCM_BIT7 (SCM_MAKISYM (0)): |
6dbd0af5 | 1828 | z = SCM_CAR (x); |
ff467021 | 1829 | switch (SCM_ISYMNUM (z)) |
6dbd0af5 | 1830 | { |
22f2cf2d DH |
1831 | case (SCM_ISYMNUM (SCM_IM_DEFINE)): |
1832 | { | |
1833 | SCM n; | |
1834 | x = SCM_CDR (x); | |
1835 | n = SCM_CAR (x); | |
1836 | z = scm_cons (n, SCM_UNSPECIFIED); | |
1837 | ls = scm_cons (scm_sym_define, z); | |
1838 | if (!SCM_NULLP (env)) | |
1839 | env = scm_cons (scm_cons (scm_cons (n, SCM_CAAR (env)), | |
1840 | SCM_CDAR (env)), | |
1841 | SCM_CDR (env)); | |
1842 | break; | |
1843 | } | |
6dbd0af5 | 1844 | case (SCM_ISYMNUM (SCM_IM_APPLY)): |
2f0d1375 | 1845 | ls = z = scm_cons (scm_sym_atapply, SCM_UNSPECIFIED); |
6dbd0af5 MD |
1846 | goto loop; |
1847 | case (SCM_ISYMNUM (SCM_IM_CONT)): | |
2f0d1375 | 1848 | ls = z = scm_cons (scm_sym_atcall_cc, SCM_UNSPECIFIED); |
6dbd0af5 | 1849 | goto loop; |
a570e93a MD |
1850 | case (SCM_ISYMNUM (SCM_IM_DELAY)): |
1851 | ls = z = scm_cons (scm_sym_delay, SCM_UNSPECIFIED); | |
1852 | x = SCM_CDR (x); | |
1853 | goto loop; | |
28d52ebb | 1854 | case (SCM_ISYMNUM (SCM_IM_FUTURE)): |
ebf9b47c | 1855 | ls = z = scm_cons (scm_sym_future, SCM_UNSPECIFIED); |
28d52ebb MD |
1856 | x = SCM_CDR (x); |
1857 | goto loop; | |
a513ead3 MV |
1858 | case (SCM_ISYMNUM (SCM_IM_CALL_WITH_VALUES)): |
1859 | ls = z = scm_cons (scm_sym_at_call_with_values, SCM_UNSPECIFIED); | |
1860 | goto loop; | |
2a6f7afe DH |
1861 | case (SCM_ISYMNUM (SCM_IM_ELSE)): |
1862 | ls = z = scm_cons (scm_sym_else, SCM_UNSPECIFIED); | |
1863 | goto loop; | |
6dbd0af5 | 1864 | default: |
fa888178 | 1865 | /* appease the Sun compiler god: */ ; |
6dbd0af5 | 1866 | } |
6dbd0af5 MD |
1867 | default: |
1868 | ls = z = unmemocar (scm_cons (unmemocopy (SCM_CAR (x), env), | |
1869 | SCM_UNSPECIFIED), | |
1870 | env); | |
1871 | } | |
1872 | loop: | |
8c494e99 DH |
1873 | x = SCM_CDR (x); |
1874 | while (SCM_CONSP (x)) | |
a23afe53 | 1875 | { |
8c494e99 DH |
1876 | SCM form = SCM_CAR (x); |
1877 | if (!SCM_ISYMP (form)) | |
1878 | { | |
1879 | SCM copy = scm_cons (unmemocopy (form, env), SCM_UNSPECIFIED); | |
1880 | SCM_SETCDR (z, unmemocar (copy, env)); | |
1881 | z = SCM_CDR (z); | |
1882 | } | |
1883 | x = SCM_CDR (x); | |
a23afe53 MD |
1884 | } |
1885 | SCM_SETCDR (z, x); | |
01f11e02 | 1886 | if (!SCM_FALSEP (p)) |
6dbd0af5 | 1887 | scm_whash_insert (scm_source_whash, ls, p); |
6dbd0af5 MD |
1888 | return ls; |
1889 | } | |
1890 | ||
1cc91f1b | 1891 | |
6dbd0af5 | 1892 | SCM |
6e8d25a6 | 1893 | scm_unmemocopy (SCM x, SCM env) |
6dbd0af5 | 1894 | { |
01f11e02 | 1895 | if (!SCM_NULLP (env)) |
6dbd0af5 MD |
1896 | /* Make a copy of the lowest frame to protect it from |
1897 | modifications by SCM_IM_DEFINE */ | |
1898 | return unmemocopy (x, scm_cons (SCM_CAR (env), SCM_CDR (env))); | |
1899 | else | |
1900 | return unmemocopy (x, env); | |
1901 | } | |
1902 | ||
1cc91f1b | 1903 | |
0f2d19dd | 1904 | int |
6e8d25a6 | 1905 | scm_badargsp (SCM formals, SCM args) |
0f2d19dd | 1906 | { |
6a0f6ff3 | 1907 | while (!SCM_NULLP (formals)) |
0f2d19dd | 1908 | { |
01f11e02 | 1909 | if (!SCM_CONSP (formals)) |
ff467021 | 1910 | return 0; |
6a0f6ff3 | 1911 | if (SCM_NULLP (args)) |
ff467021 | 1912 | return 1; |
0f2d19dd JB |
1913 | formals = SCM_CDR (formals); |
1914 | args = SCM_CDR (args); | |
1915 | } | |
01f11e02 | 1916 | return !SCM_NULLP (args) ? 1 : 0; |
0f2d19dd | 1917 | } |
a392ee15 | 1918 | |
0f2d19dd | 1919 | \f |
6dbd0af5 | 1920 | SCM |
6e8d25a6 | 1921 | scm_eval_args (SCM l, SCM env, SCM proc) |
6dbd0af5 | 1922 | { |
680ed4a8 | 1923 | SCM results = SCM_EOL, *lloc = &results, res; |
904a077d | 1924 | while (SCM_CONSP (l)) |
6dbd0af5 | 1925 | { |
680ed4a8 | 1926 | res = EVALCAR (l, env); |
904a077d | 1927 | |
8ea46249 | 1928 | *lloc = scm_list_1 (res); |
a23afe53 | 1929 | lloc = SCM_CDRLOC (*lloc); |
6dbd0af5 MD |
1930 | l = SCM_CDR (l); |
1931 | } | |
22a52da1 | 1932 | if (!SCM_NULLP (l)) |
904a077d | 1933 | scm_wrong_num_args (proc); |
680ed4a8 | 1934 | return results; |
6dbd0af5 | 1935 | } |
c4ac4d88 | 1936 | |
d0b07b5d | 1937 | |
9de33deb MD |
1938 | SCM |
1939 | scm_eval_body (SCM code, SCM env) | |
1940 | { | |
1941 | SCM next; | |
1942 | again: | |
01f11e02 DH |
1943 | next = SCM_CDR (code); |
1944 | while (!SCM_NULLP (next)) | |
9de33deb MD |
1945 | { |
1946 | if (SCM_IMP (SCM_CAR (code))) | |
1947 | { | |
1948 | if (SCM_ISYMP (SCM_CAR (code))) | |
1949 | { | |
28d52ebb | 1950 | scm_rec_mutex_lock (&source_mutex); |
9bc4701c MD |
1951 | /* check for race condition */ |
1952 | if (SCM_ISYMP (SCM_CAR (code))) | |
1953 | code = scm_m_expand_body (code, env); | |
28d52ebb | 1954 | scm_rec_mutex_unlock (&source_mutex); |
9de33deb MD |
1955 | goto again; |
1956 | } | |
1957 | } | |
1958 | else | |
1959 | SCM_XEVAL (SCM_CAR (code), env); | |
1960 | code = next; | |
01f11e02 | 1961 | next = SCM_CDR (code); |
9de33deb MD |
1962 | } |
1963 | return SCM_XEVALCAR (code, env); | |
1964 | } | |
1965 | ||
0f2d19dd JB |
1966 | #endif /* !DEVAL */ |
1967 | ||
6dbd0af5 MD |
1968 | |
1969 | /* SECTION: This code is specific for the debugging support. One | |
1970 | * branch is read when DEVAL isn't defined, the other when DEVAL is | |
1971 | * defined. | |
1972 | */ | |
1973 | ||
1974 | #ifndef DEVAL | |
1975 | ||
1976 | #define SCM_APPLY scm_apply | |
1977 | #define PREP_APPLY(proc, args) | |
1978 | #define ENTER_APPLY | |
ddea3325 | 1979 | #define RETURN(x) do { return x; } while (0) |
b7ff98dd MD |
1980 | #ifdef STACK_CHECKING |
1981 | #ifndef NO_CEVAL_STACK_CHECKING | |
1982 | #define EVAL_STACK_CHECKING | |
1983 | #endif | |
6dbd0af5 MD |
1984 | #endif |
1985 | ||
1986 | #else /* !DEVAL */ | |
1987 | ||
0f2d19dd JB |
1988 | #undef SCM_CEVAL |
1989 | #define SCM_CEVAL scm_deval /* Substitute all uses of scm_ceval */ | |
1990 | #undef SCM_APPLY | |
1991 | #define SCM_APPLY scm_dapply | |
6dbd0af5 MD |
1992 | #undef PREP_APPLY |
1993 | #define PREP_APPLY(p, l) \ | |
1994 | { ++debug.info; debug.info->a.proc = p; debug.info->a.args = l; } | |
1995 | #undef ENTER_APPLY | |
1996 | #define ENTER_APPLY \ | |
d3a6bc94 | 1997 | do { \ |
b7ff98dd | 1998 | SCM_SET_ARGSREADY (debug);\ |
5132eef0 | 1999 | if (scm_check_apply_p && SCM_TRAPS_P)\ |
b7ff98dd | 2000 | if (SCM_APPLY_FRAME_P || (SCM_TRACE_P && PROCTRACEP (proc)))\ |
6dbd0af5 | 2001 | {\ |
156dcb09 | 2002 | SCM tmp, tail = SCM_BOOL(SCM_TRACED_FRAME_P (debug)); \ |
c6a4fbce | 2003 | SCM_SET_TRACED_FRAME (debug); \ |
d95c0b76 | 2004 | SCM_TRAPS_P = 0;\ |
b7ff98dd | 2005 | if (SCM_CHEAPTRAPS_P)\ |
6dbd0af5 | 2006 | {\ |
c0ab1b8d | 2007 | tmp = scm_make_debugobj (&debug);\ |
d95c0b76 | 2008 | scm_call_3 (SCM_APPLY_FRAME_HDLR, scm_sym_apply_frame, tmp, tail);\ |
b6d75948 | 2009 | }\ |
6dbd0af5 MD |
2010 | else\ |
2011 | {\ | |
5f144b10 GH |
2012 | int first;\ |
2013 | tmp = scm_make_continuation (&first);\ | |
2014 | if (first)\ | |
d95c0b76 | 2015 | scm_call_3 (SCM_APPLY_FRAME_HDLR, scm_sym_apply_frame, tmp, tail);\ |
6dbd0af5 | 2016 | }\ |
d95c0b76 | 2017 | SCM_TRAPS_P = 1;\ |
6dbd0af5 | 2018 | }\ |
d3a6bc94 | 2019 | } while (0) |
0f2d19dd | 2020 | #undef RETURN |
ddea3325 | 2021 | #define RETURN(e) do { proc = (e); goto exit; } while (0) |
b7ff98dd MD |
2022 | #ifdef STACK_CHECKING |
2023 | #ifndef EVAL_STACK_CHECKING | |
2024 | #define EVAL_STACK_CHECKING | |
2025 | #endif | |
6dbd0af5 MD |
2026 | #endif |
2027 | ||
2028 | /* scm_ceval_ptr points to the currently selected evaluator. | |
2029 | * *fixme*: Although efficiency is important here, this state variable | |
2030 | * should probably not be a global. It should be related to the | |
2031 | * current repl. | |
2032 | */ | |
2033 | ||
1cc91f1b | 2034 | |
1bbd0b84 | 2035 | SCM (*scm_ceval_ptr) (SCM x, SCM env); |
0f2d19dd | 2036 | |
1646d37b | 2037 | /* scm_last_debug_frame contains a pointer to the last debugging |
6dbd0af5 MD |
2038 | * information stack frame. It is accessed very often from the |
2039 | * debugging evaluator, so it should probably not be indirectly | |
2040 | * addressed. Better to save and restore it from the current root at | |
2041 | * any stack swaps. | |
2042 | */ | |
2043 | ||
6dbd0af5 MD |
2044 | /* scm_debug_eframe_size is the number of slots available for pseudo |
2045 | * stack frames at each real stack frame. | |
2046 | */ | |
2047 | ||
c014a02e | 2048 | long scm_debug_eframe_size; |
6dbd0af5 | 2049 | |
b7ff98dd | 2050 | int scm_debug_mode, scm_check_entry_p, scm_check_apply_p, scm_check_exit_p; |
6dbd0af5 | 2051 | |
c014a02e | 2052 | long scm_eval_stack; |
a74145b8 | 2053 | |
92c2555f | 2054 | scm_t_option scm_eval_opts[] = { |
a74145b8 | 2055 | { SCM_OPTION_INTEGER, "stack", 22000, "Size of thread stacks (in machine words)." } |
33b97402 MD |
2056 | }; |
2057 | ||
92c2555f | 2058 | scm_t_option scm_debug_opts[] = { |
b7ff98dd MD |
2059 | { SCM_OPTION_BOOLEAN, "cheap", 1, |
2060 | "*Flyweight representation of the stack at traps." }, | |
2061 | { SCM_OPTION_BOOLEAN, "breakpoints", 0, "*Check for breakpoints." }, | |
2062 | { SCM_OPTION_BOOLEAN, "trace", 0, "*Trace mode." }, | |
2063 | { SCM_OPTION_BOOLEAN, "procnames", 1, | |
2064 | "Record procedure names at definition." }, | |
2065 | { SCM_OPTION_BOOLEAN, "backwards", 0, | |
2066 | "Display backtrace in anti-chronological order." }, | |
274dc5fd | 2067 | { SCM_OPTION_INTEGER, "width", 79, "Maximal width of backtrace." }, |
4e646a03 MD |
2068 | { SCM_OPTION_INTEGER, "indent", 10, "Maximal indentation in backtrace." }, |
2069 | { SCM_OPTION_INTEGER, "frames", 3, | |
b7ff98dd | 2070 | "Maximum number of tail-recursive frames in backtrace." }, |
4e646a03 MD |
2071 | { SCM_OPTION_INTEGER, "maxdepth", 1000, |
2072 | "Maximal number of stored backtrace frames." }, | |
2073 | { SCM_OPTION_INTEGER, "depth", 20, "Maximal length of printed backtrace." }, | |
11f77bfc MD |
2074 | { SCM_OPTION_BOOLEAN, "backtrace", 0, "Show backtrace on error." }, |
2075 | { SCM_OPTION_BOOLEAN, "debug", 0, "Use the debugging evaluator." }, | |
863e833b | 2076 | { SCM_OPTION_INTEGER, "stack", 20000, "Stack size limit (measured in words; 0 = no check)." }, |
d95c0b76 | 2077 | { SCM_OPTION_SCM, "show-file-name", (unsigned long)SCM_BOOL_T, "Show file names and line numbers in backtraces when not `#f'. A value of `base' displays only base names, while `#t' displays full names."} |
6dbd0af5 MD |
2078 | }; |
2079 | ||
92c2555f | 2080 | scm_t_option scm_evaluator_trap_table[] = { |
b6d75948 | 2081 | { SCM_OPTION_BOOLEAN, "traps", 0, "Enable evaluator traps." }, |
b7ff98dd MD |
2082 | { SCM_OPTION_BOOLEAN, "enter-frame", 0, "Trap when eval enters new frame." }, |
2083 | { SCM_OPTION_BOOLEAN, "apply-frame", 0, "Trap when entering apply." }, | |
d95c0b76 NJ |
2084 | { SCM_OPTION_BOOLEAN, "exit-frame", 0, "Trap when exiting eval or apply." }, |
2085 | { SCM_OPTION_SCM, "enter-frame-handler", (unsigned long)SCM_BOOL_F, "Handler for enter-frame traps." }, | |
2086 | { SCM_OPTION_SCM, "apply-frame-handler", (unsigned long)SCM_BOOL_F, "Handler for apply-frame traps." }, | |
2087 | { SCM_OPTION_SCM, "exit-frame-handler", (unsigned long)SCM_BOOL_F, "Handler for exit-frame traps." } | |
6dbd0af5 MD |
2088 | }; |
2089 | ||
a1ec6916 | 2090 | SCM_DEFINE (scm_eval_options_interface, "eval-options-interface", 0, 1, 0, |
1bbd0b84 | 2091 | (SCM setting), |
b3f26b14 MG |
2092 | "Option interface for the evaluation options. Instead of using\n" |
2093 | "this procedure directly, use the procedures @code{eval-enable},\n" | |
3939e9df | 2094 | "@code{eval-disable}, @code{eval-set!} and @code{eval-options}.") |
1bbd0b84 | 2095 | #define FUNC_NAME s_scm_eval_options_interface |
33b97402 MD |
2096 | { |
2097 | SCM ans; | |
2098 | SCM_DEFER_INTS; | |
2099 | ans = scm_options (setting, | |
2100 | scm_eval_opts, | |
2101 | SCM_N_EVAL_OPTIONS, | |
1bbd0b84 | 2102 | FUNC_NAME); |
a74145b8 | 2103 | scm_eval_stack = SCM_EVAL_STACK * sizeof (void *); |
33b97402 MD |
2104 | SCM_ALLOW_INTS; |
2105 | return ans; | |
2106 | } | |
1bbd0b84 | 2107 | #undef FUNC_NAME |
33b97402 | 2108 | |
d0b07b5d | 2109 | |
a1ec6916 | 2110 | SCM_DEFINE (scm_evaluator_traps, "evaluator-traps-interface", 0, 1, 0, |
1bbd0b84 | 2111 | (SCM setting), |
b3f26b14 | 2112 | "Option interface for the evaluator trap options.") |
1bbd0b84 | 2113 | #define FUNC_NAME s_scm_evaluator_traps |
33b97402 MD |
2114 | { |
2115 | SCM ans; | |
2116 | SCM_DEFER_INTS; | |
2117 | ans = scm_options (setting, | |
2118 | scm_evaluator_trap_table, | |
2119 | SCM_N_EVALUATOR_TRAPS, | |
1bbd0b84 | 2120 | FUNC_NAME); |
33b97402 | 2121 | SCM_RESET_DEBUG_MODE; |
bfc69694 | 2122 | SCM_ALLOW_INTS; |
33b97402 MD |
2123 | return ans; |
2124 | } | |
1bbd0b84 | 2125 | #undef FUNC_NAME |
33b97402 | 2126 | |
d0b07b5d | 2127 | |
24933780 | 2128 | static SCM |
a392ee15 | 2129 | deval_args (SCM l, SCM env, SCM proc, SCM *lloc) |
0f2d19dd | 2130 | { |
680ed4a8 | 2131 | SCM *results = lloc, res; |
904a077d | 2132 | while (SCM_CONSP (l)) |
0f2d19dd | 2133 | { |
680ed4a8 | 2134 | res = EVALCAR (l, env); |
904a077d | 2135 | |
8ea46249 | 2136 | *lloc = scm_list_1 (res); |
a23afe53 | 2137 | lloc = SCM_CDRLOC (*lloc); |
0f2d19dd JB |
2138 | l = SCM_CDR (l); |
2139 | } | |
22a52da1 | 2140 | if (!SCM_NULLP (l)) |
904a077d | 2141 | scm_wrong_num_args (proc); |
680ed4a8 | 2142 | return *results; |
0f2d19dd JB |
2143 | } |
2144 | ||
6dbd0af5 MD |
2145 | #endif /* !DEVAL */ |
2146 | ||
2147 | ||
a392ee15 | 2148 | /* SECTION: This code is compiled twice. |
6dbd0af5 MD |
2149 | */ |
2150 | ||
a392ee15 | 2151 | |
d9d39d76 | 2152 | /* Update the toplevel environment frame ENV so that it refers to the |
a392ee15 | 2153 | * current module. */ |
d9d39d76 MV |
2154 | #define UPDATE_TOPLEVEL_ENV(env) \ |
2155 | do { \ | |
2156 | SCM p = scm_current_module_lookup_closure (); \ | |
d0b07b5d | 2157 | if (p != SCM_CAR (env)) \ |
d9d39d76 MV |
2158 | env = scm_top_level_env (p); \ |
2159 | } while (0) | |
2160 | ||
6dbd0af5 | 2161 | |
a392ee15 DH |
2162 | /* This is the evaluator. Like any real monster, it has three heads: |
2163 | * | |
2164 | * scm_ceval is the non-debugging evaluator, scm_deval is the debugging | |
2165 | * version. Both are implemented using a common code base, using the | |
2166 | * following mechanism: SCM_CEVAL is a macro, which is either defined to | |
2167 | * scm_ceval or scm_deval. Thus, there is no function SCM_CEVAL, but the code | |
2168 | * for SCM_CEVAL actually compiles to either scm_ceval or scm_deval. When | |
2169 | * SCM_CEVAL is defined to scm_ceval, it is known that the macro DEVAL is not | |
2170 | * defined. When SCM_CEVAL is defined to scm_deval, then the macro DEVAL is | |
2171 | * known to be defined. Thus, in SCM_CEVAL parts for the debugging evaluator | |
2172 | * are enclosed within #ifdef DEVAL ... #endif. | |
2173 | * | |
2174 | * All three (scm_ceval, scm_deval and their common implementation SCM_CEVAL) | |
2175 | * take two input parameters, x and env: x is a single expression to be | |
2176 | * evalutated. env is the environment in which bindings are searched. | |
2177 | * | |
2178 | * x is known to be a cell (i. e. a pair or any other non-immediate). Since x | |
2179 | * is a single expression, it is necessarily in a tail position. If x is just | |
2180 | * a call to another function like in the expression (foo exp1 exp2 ...), the | |
2181 | * realization of that call therefore _must_not_ increase stack usage (the | |
2182 | * evaluation of exp1, exp2 etc., however, may do so). This is realized by | |
2183 | * making extensive use of 'goto' statements within the evaluator: The gotos | |
2184 | * replace recursive calls to SCM_CEVAL, thus re-using the same stack frame | |
2185 | * that SCM_CEVAL was already using. If, however, x represents some form that | |
2186 | * requires to evaluate a sequence of expressions like (begin exp1 exp2 ...), | |
2187 | * then recursive calls to SCM_CEVAL are performed for all but the last | |
2188 | * expression of that sequence. */ | |
6dbd0af5 | 2189 | |
0f2d19dd | 2190 | #if 0 |
0f2d19dd | 2191 | SCM |
1bbd0b84 | 2192 | scm_ceval (SCM x, SCM env) |
0f2d19dd JB |
2193 | {} |
2194 | #endif | |
1cc91f1b | 2195 | |
a392ee15 | 2196 | #if 0 |
0f2d19dd | 2197 | SCM |
1bbd0b84 | 2198 | scm_deval (SCM x, SCM env) |
0f2d19dd JB |
2199 | {} |
2200 | #endif | |
2201 | ||
6dbd0af5 | 2202 | SCM |
1bbd0b84 | 2203 | SCM_CEVAL (SCM x, SCM env) |
0f2d19dd | 2204 | { |
42030fb2 | 2205 | SCM proc, arg1; |
6dbd0af5 | 2206 | #ifdef DEVAL |
92c2555f MV |
2207 | scm_t_debug_frame debug; |
2208 | scm_t_debug_info *debug_info_end; | |
1646d37b | 2209 | debug.prev = scm_last_debug_frame; |
020c890c | 2210 | debug.status = 0; |
04b6c081 | 2211 | /* |
92c2555f | 2212 | * The debug.vect contains twice as much scm_t_debug_info frames as the |
04b6c081 MD |
2213 | * user has specified with (debug-set! frames <n>). |
2214 | * | |
2215 | * Even frames are eval frames, odd frames are apply frames. | |
2216 | */ | |
92c2555f | 2217 | debug.vect = (scm_t_debug_info *) alloca (scm_debug_eframe_size |
a392ee15 | 2218 | * sizeof (scm_t_debug_info)); |
c0ab1b8d JB |
2219 | debug.info = debug.vect; |
2220 | debug_info_end = debug.vect + scm_debug_eframe_size; | |
2221 | scm_last_debug_frame = &debug; | |
6dbd0af5 | 2222 | #endif |
b7ff98dd | 2223 | #ifdef EVAL_STACK_CHECKING |
79f55b7c | 2224 | if (scm_stack_checking_enabled_p && SCM_STACK_OVERFLOW_P (&proc)) |
6dbd0af5 | 2225 | { |
b7ff98dd | 2226 | #ifdef DEVAL |
6dbd0af5 MD |
2227 | debug.info->e.exp = x; |
2228 | debug.info->e.env = env; | |
b7ff98dd | 2229 | #endif |
6dbd0af5 MD |
2230 | scm_report_stack_overflow (); |
2231 | } | |
2232 | #endif | |
6a0f6ff3 | 2233 | |
6dbd0af5 MD |
2234 | #ifdef DEVAL |
2235 | goto start; | |
2236 | #endif | |
6a0f6ff3 | 2237 | |
6dbd0af5 MD |
2238 | loop: |
2239 | #ifdef DEVAL | |
b7ff98dd MD |
2240 | SCM_CLEAR_ARGSREADY (debug); |
2241 | if (SCM_OVERFLOWP (debug)) | |
6dbd0af5 | 2242 | --debug.info; |
04b6c081 MD |
2243 | /* |
2244 | * In theory, this should be the only place where it is necessary to | |
2245 | * check for space in debug.vect since both eval frames and | |
2246 | * available space are even. | |
2247 | * | |
2248 | * For this to be the case, however, it is necessary that primitive | |
2249 | * special forms which jump back to `loop', `begin' or some similar | |
680516ba | 2250 | * label call PREP_APPLY. |
04b6c081 | 2251 | */ |
c0ab1b8d | 2252 | else if (++debug.info >= debug_info_end) |
6dbd0af5 | 2253 | { |
b7ff98dd | 2254 | SCM_SET_OVERFLOW (debug); |
6dbd0af5 MD |
2255 | debug.info -= 2; |
2256 | } | |
6a0f6ff3 | 2257 | |
6dbd0af5 MD |
2258 | start: |
2259 | debug.info->e.exp = x; | |
2260 | debug.info->e.env = env; | |
5132eef0 DH |
2261 | if (scm_check_entry_p && SCM_TRAPS_P) |
2262 | { | |
bc76d628 DH |
2263 | if (SCM_ENTER_FRAME_P |
2264 | || (SCM_BREAKPOINTS_P && scm_c_source_property_breakpoint_p (x))) | |
5132eef0 | 2265 | { |
bc76d628 DH |
2266 | SCM stackrep; |
2267 | SCM tail = SCM_BOOL (SCM_TAILRECP (debug)); | |
5132eef0 DH |
2268 | SCM_SET_TAILREC (debug); |
2269 | if (SCM_CHEAPTRAPS_P) | |
bc76d628 | 2270 | stackrep = scm_make_debugobj (&debug); |
5132eef0 DH |
2271 | else |
2272 | { | |
2273 | int first; | |
2274 | SCM val = scm_make_continuation (&first); | |
2275 | ||
2276 | if (first) | |
bc76d628 | 2277 | stackrep = val; |
5132eef0 DH |
2278 | else |
2279 | { | |
2280 | x = val; | |
2281 | if (SCM_IMP (x)) | |
2282 | RETURN (x); | |
2283 | else | |
2284 | /* This gives the possibility for the debugger to | |
2285 | modify the source expression before evaluation. */ | |
2286 | goto dispatch; | |
2287 | } | |
2288 | } | |
2289 | SCM_TRAPS_P = 0; | |
2290 | scm_call_4 (SCM_ENTER_FRAME_HDLR, | |
2291 | scm_sym_enter_frame, | |
bc76d628 | 2292 | stackrep, |
5132eef0 DH |
2293 | tail, |
2294 | scm_unmemocopy (x, env)); | |
2295 | SCM_TRAPS_P = 1; | |
2296 | } | |
2297 | } | |
6dbd0af5 | 2298 | #endif |
f8769b1d | 2299 | dispatch: |
9cb5124f | 2300 | SCM_TICK; |
0f2d19dd JB |
2301 | switch (SCM_TYP7 (x)) |
2302 | { | |
28b06554 | 2303 | case scm_tc7_symbol: |
a392ee15 | 2304 | /* Only happens when called at top level. */ |
0f2d19dd | 2305 | x = scm_cons (x, SCM_UNDEFINED); |
ddea3325 | 2306 | RETURN (*scm_lookupcar (x, env, 1)); |
0f2d19dd | 2307 | |
1b43d24c | 2308 | case SCM_BIT7 (SCM_IM_AND): |
0f2d19dd | 2309 | x = SCM_CDR (x); |
302c12b4 DH |
2310 | while (!SCM_NULLP (SCM_CDR (x))) |
2311 | { | |
38ace99e DH |
2312 | SCM test_result = EVALCAR (x, env); |
2313 | if (SCM_FALSEP (test_result) || SCM_NILP (test_result)) | |
0f2d19dd | 2314 | RETURN (SCM_BOOL_F); |
302c12b4 DH |
2315 | else |
2316 | x = SCM_CDR (x); | |
2317 | } | |
6dbd0af5 | 2318 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
2319 | goto carloop; |
2320 | ||
1b43d24c | 2321 | case SCM_BIT7 (SCM_IM_BEGIN): |
e050d4f8 DH |
2322 | x = SCM_CDR (x); |
2323 | if (SCM_NULLP (x)) | |
b8113bc8 MV |
2324 | RETURN (SCM_UNSPECIFIED); |
2325 | ||
6dbd0af5 | 2326 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
2327 | |
2328 | begin: | |
4163eb72 MV |
2329 | /* If we are on toplevel with a lookup closure, we need to sync |
2330 | with the current module. */ | |
22a52da1 | 2331 | if (SCM_CONSP (env) && !SCM_CONSP (SCM_CAR (env))) |
4163eb72 | 2332 | { |
d9d39d76 | 2333 | UPDATE_TOPLEVEL_ENV (env); |
302c12b4 | 2334 | while (!SCM_NULLP (SCM_CDR (x))) |
4163eb72 | 2335 | { |
5280aaca | 2336 | EVALCAR (x, env); |
d9d39d76 | 2337 | UPDATE_TOPLEVEL_ENV (env); |
302c12b4 | 2338 | x = SCM_CDR (x); |
4163eb72 | 2339 | } |
5280aaca | 2340 | goto carloop; |
4163eb72 MV |
2341 | } |
2342 | else | |
5280aaca MV |
2343 | goto nontoplevel_begin; |
2344 | ||
5280aaca | 2345 | nontoplevel_begin: |
302c12b4 | 2346 | while (!SCM_NULLP (SCM_CDR (x))) |
0f2d19dd | 2347 | { |
6a0f6ff3 DH |
2348 | SCM form = SCM_CAR (x); |
2349 | if (SCM_IMP (form)) | |
26d5b9b4 | 2350 | { |
6a0f6ff3 | 2351 | if (SCM_ISYMP (form)) |
26d5b9b4 | 2352 | { |
28d52ebb | 2353 | scm_rec_mutex_lock (&source_mutex); |
9bc4701c MD |
2354 | /* check for race condition */ |
2355 | if (SCM_ISYMP (SCM_CAR (x))) | |
2356 | x = scm_m_expand_body (x, env); | |
28d52ebb | 2357 | scm_rec_mutex_unlock (&source_mutex); |
5280aaca | 2358 | goto nontoplevel_begin; |
26d5b9b4 | 2359 | } |
4163eb72 | 2360 | else |
6a0f6ff3 | 2361 | SCM_VALIDATE_NON_EMPTY_COMBINATION (form); |
26d5b9b4 | 2362 | } |
5280aaca | 2363 | else |
6a0f6ff3 | 2364 | SCM_CEVAL (form, env); |
302c12b4 | 2365 | x = SCM_CDR (x); |
0f2d19dd | 2366 | } |
5280aaca | 2367 | |
6a0f6ff3 DH |
2368 | carloop: |
2369 | { | |
2370 | /* scm_eval last form in list */ | |
2371 | SCM last_form = SCM_CAR (x); | |
0f2d19dd | 2372 | |
6a0f6ff3 DH |
2373 | if (SCM_CONSP (last_form)) |
2374 | { | |
2375 | /* This is by far the most frequent case. */ | |
2376 | x = last_form; | |
2377 | goto loop; /* tail recurse */ | |
2378 | } | |
2379 | else if (SCM_IMP (last_form)) | |
2380 | RETURN (SCM_EVALIM (last_form, env)); | |
2381 | else if (SCM_VARIABLEP (last_form)) | |
2382 | RETURN (SCM_VARIABLE_REF (last_form)); | |
2383 | else if (SCM_SYMBOLP (last_form)) | |
2384 | RETURN (*scm_lookupcar (x, env, 1)); | |
2385 | else | |
2386 | RETURN (last_form); | |
2387 | } | |
0f2d19dd JB |
2388 | |
2389 | ||
1b43d24c | 2390 | case SCM_BIT7 (SCM_IM_CASE): |
0f2d19dd | 2391 | x = SCM_CDR (x); |
6a0f6ff3 DH |
2392 | { |
2393 | SCM key = EVALCAR (x, env); | |
2394 | x = SCM_CDR (x); | |
2395 | while (!SCM_NULLP (x)) | |
2396 | { | |
2397 | SCM clause = SCM_CAR (x); | |
2398 | SCM labels = SCM_CAR (clause); | |
2a6f7afe | 2399 | if (SCM_EQ_P (labels, SCM_IM_ELSE)) |
6a0f6ff3 DH |
2400 | { |
2401 | x = SCM_CDR (clause); | |
2402 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2403 | goto begin; | |
2404 | } | |
2405 | while (!SCM_NULLP (labels)) | |
2406 | { | |
2407 | SCM label = SCM_CAR (labels); | |
2408 | if (SCM_EQ_P (label, key) || !SCM_FALSEP (scm_eqv_p (label, key))) | |
2409 | { | |
2410 | x = SCM_CDR (clause); | |
2411 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2412 | goto begin; | |
2413 | } | |
2414 | labels = SCM_CDR (labels); | |
2415 | } | |
2416 | x = SCM_CDR (x); | |
2417 | } | |
2418 | } | |
ddea3325 | 2419 | RETURN (SCM_UNSPECIFIED); |
0f2d19dd JB |
2420 | |
2421 | ||
1b43d24c | 2422 | case SCM_BIT7 (SCM_IM_COND): |
8ea46249 DH |
2423 | x = SCM_CDR (x); |
2424 | while (!SCM_NULLP (x)) | |
0f2d19dd | 2425 | { |
e5cb71a0 DH |
2426 | SCM clause = SCM_CAR (x); |
2427 | if (SCM_EQ_P (SCM_CAR (clause), scm_sym_else)) | |
8ea46249 | 2428 | { |
e5cb71a0 | 2429 | x = SCM_CDR (clause); |
8ea46249 DH |
2430 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
2431 | goto begin; | |
2432 | } | |
e5cb71a0 | 2433 | else |
0f2d19dd | 2434 | { |
dff98306 DH |
2435 | arg1 = EVALCAR (clause, env); |
2436 | if (!SCM_FALSEP (arg1) && !SCM_NILP (arg1)) | |
6dbd0af5 | 2437 | { |
e5cb71a0 DH |
2438 | x = SCM_CDR (clause); |
2439 | if (SCM_NULLP (x)) | |
dff98306 | 2440 | RETURN (arg1); |
e5cb71a0 DH |
2441 | else if (!SCM_EQ_P (SCM_CAR (x), scm_sym_arrow)) |
2442 | { | |
2443 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2444 | goto begin; | |
2445 | } | |
2446 | else | |
2447 | { | |
2448 | proc = SCM_CDR (x); | |
2449 | proc = EVALCAR (proc, env); | |
dff98306 | 2450 | PREP_APPLY (proc, scm_list_1 (arg1)); |
e5cb71a0 | 2451 | ENTER_APPLY; |
ddd8f927 | 2452 | goto evap1; |
e5cb71a0 | 2453 | } |
6dbd0af5 | 2454 | } |
e5cb71a0 | 2455 | x = SCM_CDR (x); |
0f2d19dd JB |
2456 | } |
2457 | } | |
ddea3325 | 2458 | RETURN (SCM_UNSPECIFIED); |
0f2d19dd JB |
2459 | |
2460 | ||
1b43d24c | 2461 | case SCM_BIT7 (SCM_IM_DO): |
0f2d19dd | 2462 | x = SCM_CDR (x); |
e5cb71a0 DH |
2463 | { |
2464 | /* Compute the initialization values and the initial environment. */ | |
e681d187 | 2465 | SCM init_forms = SCM_CAR (x); |
e5cb71a0 DH |
2466 | SCM init_values = SCM_EOL; |
2467 | while (!SCM_NULLP (init_forms)) | |
2468 | { | |
2469 | init_values = scm_cons (EVALCAR (init_forms, env), init_values); | |
2470 | init_forms = SCM_CDR (init_forms); | |
2471 | } | |
e681d187 | 2472 | x = SCM_CDR (x); |
821f18a4 | 2473 | env = SCM_EXTEND_ENV (SCM_CAR (x), init_values, env); |
e5cb71a0 | 2474 | } |
e681d187 | 2475 | x = SCM_CDR (x); |
e5cb71a0 DH |
2476 | { |
2477 | SCM test_form = SCM_CAR (x); | |
2478 | SCM body_forms = SCM_CADR (x); | |
2479 | SCM step_forms = SCM_CDDR (x); | |
2480 | ||
2481 | SCM test_result = EVALCAR (test_form, env); | |
2482 | ||
2483 | while (SCM_FALSEP (test_result) || SCM_NILP (test_result)) | |
2484 | { | |
0f2d19dd | 2485 | { |
e5cb71a0 DH |
2486 | /* Evaluate body forms. */ |
2487 | SCM temp_forms; | |
2488 | for (temp_forms = body_forms; | |
2489 | !SCM_NULLP (temp_forms); | |
2490 | temp_forms = SCM_CDR (temp_forms)) | |
2491 | { | |
2492 | SCM form = SCM_CAR (temp_forms); | |
2493 | /* Dirk:FIXME: We only need to eval forms, that may have a | |
2494 | * side effect here. This is only true for forms that start | |
2495 | * with a pair. All others are just constants. However, | |
2496 | * since in the common case there is no constant expression | |
2497 | * in a body of a do form, we just check for immediates here | |
2498 | * and have SCM_CEVAL take care of other cases. In the long | |
2499 | * run it would make sense to get rid of this test and have | |
2500 | * the macro transformer of 'do' eliminate all forms that | |
2501 | * have no sideeffect. */ | |
2502 | if (!SCM_IMP (form)) | |
2503 | SCM_CEVAL (form, env); | |
2504 | } | |
0f2d19dd | 2505 | } |
e5cb71a0 DH |
2506 | |
2507 | { | |
2508 | /* Evaluate the step expressions. */ | |
2509 | SCM temp_forms; | |
2510 | SCM step_values = SCM_EOL; | |
2511 | for (temp_forms = step_forms; | |
2512 | !SCM_NULLP (temp_forms); | |
2513 | temp_forms = SCM_CDR (temp_forms)) | |
2514 | { | |
2515 | SCM value = EVALCAR (temp_forms, env); | |
2516 | step_values = scm_cons (value, step_values); | |
2517 | } | |
821f18a4 DH |
2518 | env = SCM_EXTEND_ENV (SCM_CAAR (env), |
2519 | step_values, | |
2520 | SCM_CDR (env)); | |
e5cb71a0 DH |
2521 | } |
2522 | ||
2523 | test_result = EVALCAR (test_form, env); | |
2524 | } | |
2525 | } | |
2526 | x = SCM_CDAR (x); | |
0f2d19dd | 2527 | if (SCM_NULLP (x)) |
6dbd0af5 MD |
2528 | RETURN (SCM_UNSPECIFIED); |
2529 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
5280aaca | 2530 | goto nontoplevel_begin; |
0f2d19dd JB |
2531 | |
2532 | ||
1b43d24c | 2533 | case SCM_BIT7 (SCM_IM_IF): |
0f2d19dd | 2534 | x = SCM_CDR (x); |
38ace99e DH |
2535 | { |
2536 | SCM test_result = EVALCAR (x, env); | |
2537 | if (!SCM_FALSEP (test_result) && !SCM_NILP (test_result)) | |
2538 | x = SCM_CDR (x); | |
2539 | else | |
2540 | { | |
2541 | x = SCM_CDDR (x); | |
2542 | if (SCM_NULLP (x)) | |
2543 | RETURN (SCM_UNSPECIFIED); | |
2544 | } | |
2545 | } | |
6dbd0af5 | 2546 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
2547 | goto carloop; |
2548 | ||
2549 | ||
1b43d24c | 2550 | case SCM_BIT7 (SCM_IM_LET): |
0f2d19dd | 2551 | x = SCM_CDR (x); |
38ace99e DH |
2552 | { |
2553 | SCM init_forms = SCM_CADR (x); | |
2554 | SCM init_values = SCM_EOL; | |
2555 | do | |
2556 | { | |
2557 | init_values = scm_cons (EVALCAR (init_forms, env), init_values); | |
2558 | init_forms = SCM_CDR (init_forms); | |
2559 | } | |
2560 | while (!SCM_NULLP (init_forms)); | |
821f18a4 | 2561 | env = SCM_EXTEND_ENV (SCM_CAR (x), init_values, env); |
38ace99e | 2562 | } |
e050d4f8 DH |
2563 | x = SCM_CDDR (x); |
2564 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2565 | goto nontoplevel_begin; | |
0f2d19dd JB |
2566 | |
2567 | ||
1b43d24c | 2568 | case SCM_BIT7 (SCM_IM_LETREC): |
0f2d19dd | 2569 | x = SCM_CDR (x); |
821f18a4 | 2570 | env = SCM_EXTEND_ENV (SCM_CAR (x), undefineds, env); |
0f2d19dd | 2571 | x = SCM_CDR (x); |
38ace99e DH |
2572 | { |
2573 | SCM init_forms = SCM_CAR (x); | |
2574 | SCM init_values = SCM_EOL; | |
2575 | do | |
2576 | { | |
2577 | init_values = scm_cons (EVALCAR (init_forms, env), init_values); | |
2578 | init_forms = SCM_CDR (init_forms); | |
2579 | } | |
2580 | while (!SCM_NULLP (init_forms)); | |
2581 | SCM_SETCDR (SCM_CAR (env), init_values); | |
2582 | } | |
e050d4f8 DH |
2583 | x = SCM_CDR (x); |
2584 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2585 | goto nontoplevel_begin; | |
0f2d19dd JB |
2586 | |
2587 | ||
1b43d24c | 2588 | case SCM_BIT7 (SCM_IM_LETSTAR): |
0f2d19dd | 2589 | x = SCM_CDR (x); |
302c12b4 DH |
2590 | { |
2591 | SCM bindings = SCM_CAR (x); | |
2592 | if (SCM_NULLP (bindings)) | |
821f18a4 | 2593 | env = SCM_EXTEND_ENV (SCM_EOL, SCM_EOL, env); |
302c12b4 DH |
2594 | else |
2595 | { | |
2596 | do | |
2597 | { | |
2598 | SCM name = SCM_CAR (bindings); | |
2599 | SCM init = SCM_CDR (bindings); | |
821f18a4 | 2600 | env = SCM_EXTEND_ENV (name, EVALCAR (init, env), env); |
302c12b4 DH |
2601 | bindings = SCM_CDR (init); |
2602 | } | |
2603 | while (!SCM_NULLP (bindings)); | |
2604 | } | |
2605 | } | |
e050d4f8 DH |
2606 | x = SCM_CDR (x); |
2607 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2608 | goto nontoplevel_begin; | |
0f2d19dd | 2609 | |
302c12b4 | 2610 | |
1b43d24c | 2611 | case SCM_BIT7 (SCM_IM_OR): |
0f2d19dd | 2612 | x = SCM_CDR (x); |
302c12b4 | 2613 | while (!SCM_NULLP (SCM_CDR (x))) |
0f2d19dd | 2614 | { |
302c12b4 | 2615 | SCM val = EVALCAR (x, env); |
c96d76b8 | 2616 | if (!SCM_FALSEP (val) && !SCM_NILP (val)) |
302c12b4 DH |
2617 | RETURN (val); |
2618 | else | |
2619 | x = SCM_CDR (x); | |
0f2d19dd | 2620 | } |
6dbd0af5 | 2621 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
2622 | goto carloop; |
2623 | ||
2624 | ||
1b43d24c | 2625 | case SCM_BIT7 (SCM_IM_LAMBDA): |
0f2d19dd JB |
2626 | RETURN (scm_closure (SCM_CDR (x), env)); |
2627 | ||
2628 | ||
1b43d24c | 2629 | case SCM_BIT7 (SCM_IM_QUOTE): |
8ea46249 | 2630 | RETURN (SCM_CADR (x)); |
0f2d19dd JB |
2631 | |
2632 | ||
1b43d24c | 2633 | case SCM_BIT7 (SCM_IM_SET_X): |
0f2d19dd | 2634 | x = SCM_CDR (x); |
38ace99e DH |
2635 | { |
2636 | SCM *location; | |
2637 | SCM variable = SCM_CAR (x); | |
e050d4f8 | 2638 | if (SCM_ILOCP (variable)) |
38ace99e | 2639 | location = scm_ilookup (variable, env); |
3063e30a | 2640 | else if (SCM_VARIABLEP (variable)) |
e050d4f8 | 2641 | location = SCM_VARIABLE_LOC (variable); |
38ace99e DH |
2642 | else /* (SCM_SYMBOLP (variable)) is known to be true */ |
2643 | location = scm_lookupcar (x, env, 1); | |
2644 | x = SCM_CDR (x); | |
2645 | *location = EVALCAR (x, env); | |
2646 | } | |
0f2d19dd | 2647 | RETURN (SCM_UNSPECIFIED); |
0f2d19dd JB |
2648 | |
2649 | ||
0f2d19dd | 2650 | /* new syntactic forms go here. */ |
1b43d24c | 2651 | case SCM_BIT7 (SCM_MAKISYM (0)): |
0f2d19dd | 2652 | proc = SCM_CAR (x); |
a392ee15 | 2653 | switch (SCM_ISYMNUM (proc)) |
0f2d19dd | 2654 | { |
3f04400d DH |
2655 | |
2656 | ||
22f2cf2d DH |
2657 | case (SCM_ISYMNUM (SCM_IM_DEFINE)): |
2658 | /* Top level defines are handled directly by the memoizer and thus | |
2659 | * will never generate memoized code with SCM_IM_DEFINE. Internal | |
2660 | * defines which occur at valid positions will be transformed into | |
2661 | * letrec expressions. Thus, whenever the executor detects | |
2662 | * SCM_IM_DEFINE, this must come from an internal definition at an | |
2663 | * illegal position. */ | |
2664 | scm_misc_error (NULL, "Bad define placement", SCM_EOL); | |
2665 | ||
2666 | ||
0f2d19dd | 2667 | case (SCM_ISYMNUM (SCM_IM_APPLY)): |
e910e9d2 DH |
2668 | x = SCM_CDR (x); |
2669 | proc = EVALCAR (x, env); | |
2670 | PREP_APPLY (proc, SCM_EOL); | |
2671 | x = SCM_CDR (x); | |
2672 | arg1 = EVALCAR (x, env); | |
9a069bdd DH |
2673 | |
2674 | apply_proc: | |
2675 | /* Go here to tail-apply a procedure. PROC is the procedure and | |
2676 | * ARG1 is the list of arguments. PREP_APPLY must have been called | |
2677 | * before jumping to apply_proc. */ | |
0f2d19dd JB |
2678 | if (SCM_CLOSUREP (proc)) |
2679 | { | |
9a069bdd | 2680 | SCM formals = SCM_CLOSURE_FORMALS (proc); |
6dbd0af5 | 2681 | #ifdef DEVAL |
9a069bdd | 2682 | debug.info->a.args = arg1; |
6dbd0af5 | 2683 | #endif |
9a069bdd DH |
2684 | if (scm_badargsp (formals, arg1)) |
2685 | scm_wrong_num_args (proc); | |
2686 | ENTER_APPLY; | |
2687 | /* Copy argument list */ | |
2688 | if (SCM_NULL_OR_NIL_P (arg1)) | |
2689 | env = SCM_EXTEND_ENV (formals, SCM_EOL, SCM_ENV (proc)); | |
2690 | else | |
2691 | { | |
2692 | SCM args = scm_list_1 (SCM_CAR (arg1)); | |
2693 | SCM tail = args; | |
2694 | arg1 = SCM_CDR (arg1); | |
2695 | while (!SCM_NULL_OR_NIL_P (arg1)) | |
2696 | { | |
2697 | SCM new_tail = scm_list_1 (SCM_CAR (arg1)); | |
2698 | SCM_SETCDR (tail, new_tail); | |
2699 | tail = new_tail; | |
2700 | arg1 = SCM_CDR (arg1); | |
2701 | } | |
2702 | env = SCM_EXTEND_ENV (formals, args, SCM_ENV (proc)); | |
2703 | } | |
2704 | ||
2705 | x = SCM_CLOSURE_BODY (proc); | |
2706 | goto nontoplevel_begin; | |
0f2d19dd | 2707 | } |
3f04400d DH |
2708 | else |
2709 | { | |
e910e9d2 DH |
2710 | ENTER_APPLY; |
2711 | RETURN (SCM_APPLY (proc, arg1, SCM_EOL)); | |
3f04400d DH |
2712 | } |
2713 | ||
0f2d19dd JB |
2714 | |
2715 | case (SCM_ISYMNUM (SCM_IM_CONT)): | |
5f144b10 GH |
2716 | { |
2717 | int first; | |
2718 | SCM val = scm_make_continuation (&first); | |
2719 | ||
e050d4f8 | 2720 | if (!first) |
5f144b10 | 2721 | RETURN (val); |
e050d4f8 DH |
2722 | else |
2723 | { | |
2724 | arg1 = val; | |
2725 | proc = SCM_CDR (x); | |
2726 | proc = scm_eval_car (proc, env); | |
e050d4f8 DH |
2727 | PREP_APPLY (proc, scm_list_1 (arg1)); |
2728 | ENTER_APPLY; | |
e050d4f8 DH |
2729 | goto evap1; |
2730 | } | |
5f144b10 | 2731 | } |
e050d4f8 | 2732 | |
0f2d19dd | 2733 | |
a570e93a | 2734 | case (SCM_ISYMNUM (SCM_IM_DELAY)): |
ddea3325 | 2735 | RETURN (scm_makprom (scm_closure (SCM_CDR (x), env))); |
a570e93a | 2736 | |
e050d4f8 | 2737 | |
28d52ebb MD |
2738 | case (SCM_ISYMNUM (SCM_IM_FUTURE)): |
2739 | RETURN (scm_i_make_future (scm_closure (SCM_CDR (x), env))); | |
2740 | ||
2741 | ||
c8e1d354 MD |
2742 | /* PLACEHOLDER for case (SCM_ISYMNUM (SCM_IM_DISPATCH)): The |
2743 | following code (type_dispatch) is intended to be the tail | |
2744 | of the case clause for the internal macro | |
2745 | SCM_IM_DISPATCH. Please don't remove it from this | |
2746 | location without discussing it with Mikael | |
2747 | <djurfeldt@nada.kth.se> */ | |
2748 | ||
f12745b6 DH |
2749 | /* The type dispatch code is duplicated below |
2750 | * (c.f. objects.c:scm_mcache_compute_cmethod) since that | |
2751 | * cuts down execution time for type dispatch to 50%. */ | |
dff98306 | 2752 | type_dispatch: /* inputs: x, arg1 */ |
f12745b6 DH |
2753 | /* Type dispatch means to determine from the types of the function |
2754 | * arguments (i. e. the 'signature' of the call), which method from | |
2755 | * a generic function is to be called. This process of selecting | |
2756 | * the right method takes some time. To speed it up, guile uses | |
2757 | * caching: Together with the macro call to dispatch the signatures | |
2758 | * of some previous calls to that generic function from the same | |
2759 | * place are stored (in the code!) in a cache that we call the | |
2760 | * 'method cache'. This is done since it is likely, that | |
2761 | * consecutive calls to dispatch from that position in the code will | |
2762 | * have the same signature. Thus, the type dispatch works as | |
2763 | * follows: First, determine a hash value from the signature of the | |
2764 | * actual arguments. Second, use this hash value as an index to | |
2765 | * find that same signature in the method cache stored at this | |
2766 | * position in the code. If found, you have also found the | |
2767 | * corresponding method that belongs to that signature. If the | |
2768 | * signature is not found in the method cache, you have to perform a | |
2769 | * full search over all signatures stored with the generic | |
2770 | * function. */ | |
2771 | { | |
2772 | unsigned long int specializers; | |
2773 | unsigned long int hash_value; | |
2774 | unsigned long int cache_end_pos; | |
2775 | unsigned long int mask; | |
2776 | SCM method_cache; | |
2777 | ||
2778 | { | |
2779 | SCM z = SCM_CDDR (x); | |
2780 | SCM tmp = SCM_CADR (z); | |
2781 | specializers = SCM_INUM (SCM_CAR (z)); | |
2782 | ||
2783 | /* Compute a hash value for searching the method cache. There | |
2784 | * are two variants for computing the hash value, a (rather) | |
2785 | * complicated one, and a simple one. For the complicated one | |
2786 | * explained below, tmp holds a number that is used in the | |
2787 | * computation. */ | |
2788 | if (SCM_INUMP (tmp)) | |
2789 | { | |
2790 | /* Use the signature of the actual arguments to determine | |
2791 | * the hash value. This is done as follows: Each class has | |
2792 | * an array of random numbers, that are determined when the | |
2793 | * class is created. The integer 'hashset' is an index into | |
2794 | * that array of random numbers. Now, from all classes that | |
2795 | * are part of the signature of the actual arguments, the | |
2796 | * random numbers at index 'hashset' are taken and summed | |
2797 | * up, giving the hash value. The value of 'hashset' is | |
2798 | * stored at the call to dispatch. This allows to have | |
2799 | * different 'formulas' for calculating the hash value at | |
2800 | * different places where dispatch is called. This allows | |
2801 | * to optimize the hash formula at every individual place | |
2802 | * where dispatch is called, such that hopefully the hash | |
2803 | * value that is computed will directly point to the right | |
2804 | * method in the method cache. */ | |
2805 | unsigned long int hashset = SCM_INUM (tmp); | |
2806 | unsigned long int counter = specializers + 1; | |
dff98306 | 2807 | SCM tmp_arg = arg1; |
f12745b6 DH |
2808 | hash_value = 0; |
2809 | while (!SCM_NULLP (tmp_arg) && counter != 0) | |
61364ba6 | 2810 | { |
f12745b6 DH |
2811 | SCM class = scm_class_of (SCM_CAR (tmp_arg)); |
2812 | hash_value += SCM_INSTANCE_HASH (class, hashset); | |
2813 | tmp_arg = SCM_CDR (tmp_arg); | |
2814 | counter--; | |
61364ba6 | 2815 | } |
f12745b6 DH |
2816 | z = SCM_CDDR (z); |
2817 | method_cache = SCM_CADR (z); | |
2818 | mask = SCM_INUM (SCM_CAR (z)); | |
2819 | hash_value &= mask; | |
2820 | cache_end_pos = hash_value; | |
2821 | } | |
2822 | else | |
2823 | { | |
2824 | /* This method of determining the hash value is much | |
2825 | * simpler: Set the hash value to zero and just perform a | |
2826 | * linear search through the method cache. */ | |
2827 | method_cache = tmp; | |
2828 | mask = (unsigned long int) ((long) -1); | |
2829 | hash_value = 0; | |
2830 | cache_end_pos = SCM_VECTOR_LENGTH (method_cache); | |
2831 | } | |
2832 | } | |
61364ba6 | 2833 | |
f12745b6 DH |
2834 | { |
2835 | /* Search the method cache for a method with a matching | |
2836 | * signature. Start the search at position 'hash_value'. The | |
2837 | * hashing implementation uses linear probing for conflict | |
2838 | * resolution, that is, if the signature in question is not | |
2839 | * found at the starting index in the hash table, the next table | |
2840 | * entry is tried, and so on, until in the worst case the whole | |
2841 | * cache has been searched, but still the signature has not been | |
2842 | * found. */ | |
2843 | SCM z; | |
2844 | do | |
2845 | { | |
dff98306 | 2846 | SCM args = arg1; /* list of arguments */ |
f12745b6 DH |
2847 | z = SCM_VELTS (method_cache)[hash_value]; |
2848 | while (!SCM_NULLP (args)) | |
61364ba6 MD |
2849 | { |
2850 | /* More arguments than specifiers => CLASS != ENV */ | |
f12745b6 DH |
2851 | SCM class_of_arg = scm_class_of (SCM_CAR (args)); |
2852 | if (!SCM_EQ_P (class_of_arg, SCM_CAR (z))) | |
61364ba6 | 2853 | goto next_method; |
f12745b6 | 2854 | args = SCM_CDR (args); |
61364ba6 MD |
2855 | z = SCM_CDR (z); |
2856 | } | |
f12745b6 DH |
2857 | /* Fewer arguments than specifiers => CAR != ENV */ |
2858 | if (SCM_NULLP (SCM_CAR (z)) || SCM_CONSP (SCM_CAR (z))) | |
2859 | goto apply_cmethod; | |
2860 | next_method: | |
2861 | hash_value = (hash_value + 1) & mask; | |
2862 | } while (hash_value != cache_end_pos); | |
2863 | ||
2864 | /* No appropriate method was found in the cache. */ | |
dff98306 | 2865 | z = scm_memoize_method (x, arg1); |
f12745b6 | 2866 | |
dff98306 | 2867 | apply_cmethod: /* inputs: z, arg1 */ |
f12745b6 DH |
2868 | { |
2869 | SCM formals = SCM_CMETHOD_FORMALS (z); | |
821f18a4 | 2870 | env = SCM_EXTEND_ENV (formals, arg1, SCM_CMETHOD_ENV (z)); |
f12745b6 DH |
2871 | x = SCM_CMETHOD_BODY (z); |
2872 | goto nontoplevel_begin; | |
2873 | } | |
2874 | } | |
61364ba6 | 2875 | } |
73b64342 | 2876 | |
1d15ecd3 | 2877 | |
ca4be6ea MD |
2878 | case (SCM_ISYMNUM (SCM_IM_SLOT_REF)): |
2879 | x = SCM_CDR (x); | |
1d15ecd3 DH |
2880 | { |
2881 | SCM instance = EVALCAR (x, env); | |
2882 | unsigned long int slot = SCM_INUM (SCM_CADR (x)); | |
2883 | RETURN (SCM_PACK (SCM_STRUCT_DATA (instance) [slot])); | |
2884 | } | |
2885 | ||
2886 | ||
ca4be6ea MD |
2887 | case (SCM_ISYMNUM (SCM_IM_SLOT_SET_X)): |
2888 | x = SCM_CDR (x); | |
1d15ecd3 DH |
2889 | { |
2890 | SCM instance = EVALCAR (x, env); | |
2891 | unsigned long int slot = SCM_INUM (SCM_CADR (x)); | |
2892 | SCM value = EVALCAR (SCM_CDDR (x), env); | |
2893 | SCM_STRUCT_DATA (instance) [slot] = SCM_UNPACK (value); | |
2894 | RETURN (SCM_UNSPECIFIED); | |
2895 | } | |
2896 | ||
c96d76b8 | 2897 | |
22721140 | 2898 | #if SCM_ENABLE_ELISP |
ca4be6ea | 2899 | |
73b64342 | 2900 | case (SCM_ISYMNUM (SCM_IM_NIL_COND)): |
1d15ecd3 DH |
2901 | { |
2902 | SCM test_form = SCM_CDR (x); | |
2903 | x = SCM_CDR (test_form); | |
2904 | while (!SCM_NULL_OR_NIL_P (x)) | |
2905 | { | |
2906 | SCM test_result = EVALCAR (test_form, env); | |
2907 | if (!(SCM_FALSEP (test_result) | |
2908 | || SCM_NULL_OR_NIL_P (test_result))) | |
2909 | { | |
2910 | if (SCM_EQ_P (SCM_CAR (x), SCM_UNSPECIFIED)) | |
2911 | RETURN (test_result); | |
2912 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2913 | goto carloop; | |
2914 | } | |
2915 | else | |
2916 | { | |
2917 | test_form = SCM_CDR (x); | |
2918 | x = SCM_CDR (test_form); | |
2919 | } | |
2920 | } | |
2921 | x = test_form; | |
2922 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2923 | goto carloop; | |
2924 | } | |
73b64342 | 2925 | |
c96d76b8 | 2926 | #endif /* SCM_ENABLE_ELISP */ |
73b64342 MD |
2927 | |
2928 | case (SCM_ISYMNUM (SCM_IM_BIND)): | |
2e171178 MV |
2929 | { |
2930 | SCM vars, exps, vals; | |
73b64342 | 2931 | |
2e171178 MV |
2932 | x = SCM_CDR (x); |
2933 | vars = SCM_CAAR (x); | |
2934 | exps = SCM_CDAR (x); | |
2935 | ||
2936 | vals = SCM_EOL; | |
2937 | ||
2938 | while (SCM_NIMP (exps)) | |
2939 | { | |
2940 | vals = scm_cons (EVALCAR (exps, env), vals); | |
2941 | exps = SCM_CDR (exps); | |
2942 | } | |
2943 | ||
2944 | scm_swap_bindings (vars, vals); | |
2945 | scm_dynwinds = scm_acons (vars, vals, scm_dynwinds); | |
1d15ecd3 DH |
2946 | |
2947 | /* Ignore all but the last evaluation result. */ | |
2948 | for (x = SCM_CDR (x); !SCM_NULLP (SCM_CDR (x)); x = SCM_CDR (x)) | |
2e171178 | 2949 | { |
1d15ecd3 DH |
2950 | if (SCM_CONSP (SCM_CAR (x))) |
2951 | SCM_CEVAL (SCM_CAR (x), env); | |
2e171178 MV |
2952 | } |
2953 | proc = EVALCAR (x, env); | |
73b64342 | 2954 | |
2e171178 MV |
2955 | scm_dynwinds = SCM_CDR (scm_dynwinds); |
2956 | scm_swap_bindings (vars, vals); | |
73b64342 | 2957 | |
ddea3325 | 2958 | RETURN (proc); |
2e171178 | 2959 | } |
c96d76b8 | 2960 | |
1d15ecd3 | 2961 | |
a513ead3 MV |
2962 | case (SCM_ISYMNUM (SCM_IM_CALL_WITH_VALUES)): |
2963 | { | |
9a069bdd DH |
2964 | SCM producer; |
2965 | ||
2966 | x = SCM_CDR (x); | |
2967 | producer = EVALCAR (x, env); | |
2968 | x = SCM_CDR (x); | |
2969 | proc = EVALCAR (x, env); /* proc is the consumer. */ | |
2970 | arg1 = SCM_APPLY (producer, SCM_EOL, SCM_EOL); | |
dff98306 DH |
2971 | if (SCM_VALUESP (arg1)) |
2972 | arg1 = scm_struct_ref (arg1, SCM_INUM0); | |
a513ead3 | 2973 | else |
dff98306 | 2974 | arg1 = scm_list_1 (arg1); |
9a069bdd DH |
2975 | PREP_APPLY (proc, arg1); |
2976 | goto apply_proc; | |
a513ead3 MV |
2977 | } |
2978 | ||
b7798e10 | 2979 | |
0f2d19dd | 2980 | default: |
ddd8f927 | 2981 | goto evapply; |
0f2d19dd JB |
2982 | } |
2983 | ||
2984 | default: | |
2985 | proc = x; | |
ddd8f927 | 2986 | goto evapply; |
0f2d19dd JB |
2987 | case scm_tc7_vector: |
2988 | case scm_tc7_wvect: | |
22721140 | 2989 | #if SCM_HAVE_ARRAYS |
0f2d19dd JB |
2990 | case scm_tc7_bvect: |
2991 | case scm_tc7_byvect: | |
2992 | case scm_tc7_svect: | |
2993 | case scm_tc7_ivect: | |
2994 | case scm_tc7_uvect: | |
2995 | case scm_tc7_fvect: | |
2996 | case scm_tc7_dvect: | |
2997 | case scm_tc7_cvect: | |
3d05f2e0 | 2998 | #if SCM_SIZEOF_LONG_LONG != 0 |
0f2d19dd | 2999 | case scm_tc7_llvect: |
afe5177e | 3000 | #endif |
0f2d19dd | 3001 | #endif |
534c55a9 | 3002 | case scm_tc7_number: |
0f2d19dd | 3003 | case scm_tc7_string: |
0f2d19dd JB |
3004 | case scm_tc7_smob: |
3005 | case scm_tcs_closures: | |
224822be | 3006 | case scm_tc7_cclo: |
89efbff4 | 3007 | case scm_tc7_pws: |
0f2d19dd | 3008 | case scm_tcs_subrs: |
904a077d | 3009 | case scm_tcs_struct: |
0f2d19dd JB |
3010 | RETURN (x); |
3011 | ||
d22a0ea1 | 3012 | case scm_tc7_variable: |
a130e982 | 3013 | RETURN (SCM_VARIABLE_REF(x)); |
d22a0ea1 | 3014 | |
1b43d24c | 3015 | case SCM_BIT7 (SCM_ILOC00): |
0f2d19dd | 3016 | proc = *scm_ilookup (SCM_CAR (x), env); |
ddd8f927 | 3017 | goto checkmacro; |
b7798e10 | 3018 | |
0f2d19dd | 3019 | case scm_tcs_cons_nimcar: |
e050d4f8 | 3020 | if (SCM_SYMBOLP (SCM_CAR (x))) |
0f2d19dd | 3021 | { |
e050d4f8 | 3022 | SCM orig_sym = SCM_CAR (x); |
b7798e10 DH |
3023 | { |
3024 | SCM *location = scm_lookupcar1 (x, env, 1); | |
3025 | if (location == NULL) | |
3026 | { | |
3027 | /* we have lost the race, start again. */ | |
3028 | goto dispatch; | |
3029 | } | |
3030 | proc = *location; | |
3031 | } | |
f8769b1d | 3032 | |
22a52da1 | 3033 | if (SCM_MACROP (proc)) |
0f2d19dd | 3034 | { |
86d31dfe MV |
3035 | SCM_SETCAR (x, orig_sym); /* Undo memoizing effect of |
3036 | lookupcar */ | |
e050d4f8 | 3037 | handle_a_macro: /* inputs: x, env, proc */ |
368bf056 | 3038 | #ifdef DEVAL |
7c354052 MD |
3039 | /* Set a flag during macro expansion so that macro |
3040 | application frames can be deleted from the backtrace. */ | |
3041 | SCM_SET_MACROEXP (debug); | |
368bf056 | 3042 | #endif |
dff98306 | 3043 | arg1 = SCM_APPLY (SCM_MACRO_CODE (proc), x, |
f8769b1d MV |
3044 | scm_cons (env, scm_listofnull)); |
3045 | ||
7c354052 MD |
3046 | #ifdef DEVAL |
3047 | SCM_CLEAR_MACROEXP (debug); | |
3048 | #endif | |
22a52da1 | 3049 | switch (SCM_MACRO_TYPE (proc)) |
0f2d19dd | 3050 | { |
3b88ed2a | 3051 | case 3: |
0f2d19dd | 3052 | case 2: |
dff98306 DH |
3053 | if (scm_ilength (arg1) <= 0) |
3054 | arg1 = scm_list_2 (SCM_IM_BEGIN, arg1); | |
6dbd0af5 | 3055 | #ifdef DEVAL |
22a52da1 | 3056 | if (!SCM_CLOSUREP (SCM_MACRO_CODE (proc))) |
6dbd0af5 | 3057 | { |
6dbd0af5 | 3058 | SCM_DEFER_INTS; |
dff98306 DH |
3059 | SCM_SETCAR (x, SCM_CAR (arg1)); |
3060 | SCM_SETCDR (x, SCM_CDR (arg1)); | |
6dbd0af5 MD |
3061 | SCM_ALLOW_INTS; |
3062 | goto dispatch; | |
3063 | } | |
3064 | /* Prevent memoizing of debug info expression. */ | |
6203706f MD |
3065 | debug.info->e.exp = scm_cons_source (debug.info->e.exp, |
3066 | SCM_CAR (x), | |
3067 | SCM_CDR (x)); | |
6dbd0af5 | 3068 | #endif |
0f2d19dd | 3069 | SCM_DEFER_INTS; |
dff98306 DH |
3070 | SCM_SETCAR (x, SCM_CAR (arg1)); |
3071 | SCM_SETCDR (x, SCM_CDR (arg1)); | |
0f2d19dd | 3072 | SCM_ALLOW_INTS; |
680516ba DH |
3073 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
3074 | goto loop; | |
3063e30a | 3075 | #if SCM_ENABLE_DEPRECATED == 1 |
0f2d19dd | 3076 | case 1: |
680516ba DH |
3077 | x = arg1; |
3078 | if (SCM_NIMP (x)) | |
3079 | { | |
3080 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
3081 | goto loop; | |
3082 | } | |
3083 | else | |
3084 | RETURN (arg1); | |
3063e30a | 3085 | #endif |
0f2d19dd | 3086 | case 0: |
dff98306 | 3087 | RETURN (arg1); |
0f2d19dd JB |
3088 | } |
3089 | } | |
3090 | } | |
3091 | else | |
3092 | proc = SCM_CEVAL (SCM_CAR (x), env); | |
bd987b8e | 3093 | |
ddd8f927 DH |
3094 | checkmacro: |
3095 | if (SCM_MACROP (proc)) | |
0f2d19dd | 3096 | goto handle_a_macro; |
0f2d19dd JB |
3097 | } |
3098 | ||
3099 | ||
e050d4f8 | 3100 | evapply: /* inputs: x, proc */ |
6dbd0af5 MD |
3101 | PREP_APPLY (proc, SCM_EOL); |
3102 | if (SCM_NULLP (SCM_CDR (x))) { | |
3103 | ENTER_APPLY; | |
89efbff4 | 3104 | evap0: |
ddd8f927 | 3105 | SCM_ASRTGO (!SCM_IMP (proc), badfun); |
0f2d19dd JB |
3106 | switch (SCM_TYP7 (proc)) |
3107 | { /* no arguments given */ | |
3108 | case scm_tc7_subr_0: | |
3109 | RETURN (SCM_SUBRF (proc) ()); | |
3110 | case scm_tc7_subr_1o: | |
3111 | RETURN (SCM_SUBRF (proc) (SCM_UNDEFINED)); | |
3112 | case scm_tc7_lsubr: | |
3113 | RETURN (SCM_SUBRF (proc) (SCM_EOL)); | |
3114 | case scm_tc7_rpsubr: | |
3115 | RETURN (SCM_BOOL_T); | |
3116 | case scm_tc7_asubr: | |
3117 | RETURN (SCM_SUBRF (proc) (SCM_UNDEFINED, SCM_UNDEFINED)); | |
0717dfd8 | 3118 | case scm_tc7_smob: |
68b06924 | 3119 | if (!SCM_SMOB_APPLICABLE_P (proc)) |
0717dfd8 | 3120 | goto badfun; |
68b06924 | 3121 | RETURN (SCM_SMOB_APPLY_0 (proc)); |
0f2d19dd | 3122 | case scm_tc7_cclo: |
dff98306 | 3123 | arg1 = proc; |
0f2d19dd | 3124 | proc = SCM_CCLO_SUBR (proc); |
6dbd0af5 MD |
3125 | #ifdef DEVAL |
3126 | debug.info->a.proc = proc; | |
dff98306 | 3127 | debug.info->a.args = scm_list_1 (arg1); |
6dbd0af5 | 3128 | #endif |
0f2d19dd | 3129 | goto evap1; |
89efbff4 MD |
3130 | case scm_tc7_pws: |
3131 | proc = SCM_PROCEDURE (proc); | |
3132 | #ifdef DEVAL | |
3133 | debug.info->a.proc = proc; | |
3134 | #endif | |
002f1a5d MD |
3135 | if (!SCM_CLOSUREP (proc)) |
3136 | goto evap0; | |
ddd8f927 | 3137 | /* fallthrough */ |
0f2d19dd | 3138 | case scm_tcs_closures: |
ddd8f927 DH |
3139 | { |
3140 | const SCM formals = SCM_CLOSURE_FORMALS (proc); | |
3141 | if (SCM_CONSP (formals)) | |
3142 | goto umwrongnumargs; | |
3143 | x = SCM_CLOSURE_BODY (proc); | |
3144 | env = SCM_EXTEND_ENV (formals, SCM_EOL, SCM_ENV (proc)); | |
3145 | goto nontoplevel_begin; | |
3146 | } | |
904a077d | 3147 | case scm_tcs_struct: |
195847fa MD |
3148 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) |
3149 | { | |
3150 | x = SCM_ENTITY_PROCEDURE (proc); | |
dff98306 | 3151 | arg1 = SCM_EOL; |
195847fa MD |
3152 | goto type_dispatch; |
3153 | } | |
2ca0d207 | 3154 | else if (SCM_I_OPERATORP (proc)) |
da7f71d7 | 3155 | { |
dff98306 | 3156 | arg1 = proc; |
195847fa MD |
3157 | proc = (SCM_I_ENTITYP (proc) |
3158 | ? SCM_ENTITY_PROCEDURE (proc) | |
3159 | : SCM_OPERATOR_PROCEDURE (proc)); | |
da7f71d7 | 3160 | #ifdef DEVAL |
195847fa | 3161 | debug.info->a.proc = proc; |
dff98306 | 3162 | debug.info->a.args = scm_list_1 (arg1); |
da7f71d7 | 3163 | #endif |
ddd8f927 | 3164 | goto evap1; |
da7f71d7 | 3165 | } |
2ca0d207 DH |
3166 | else |
3167 | goto badfun; | |
0f2d19dd JB |
3168 | case scm_tc7_subr_1: |
3169 | case scm_tc7_subr_2: | |
3170 | case scm_tc7_subr_2o: | |
14b18ed6 | 3171 | case scm_tc7_dsubr: |
0f2d19dd JB |
3172 | case scm_tc7_cxr: |
3173 | case scm_tc7_subr_3: | |
3174 | case scm_tc7_lsubr_2: | |
3175 | umwrongnumargs: | |
3176 | unmemocar (x, env); | |
f5bf2977 | 3177 | scm_wrong_num_args (proc); |
0f2d19dd | 3178 | default: |
ddd8f927 DH |
3179 | badfun: |
3180 | scm_misc_error (NULL, "Wrong type to apply: ~S", scm_list_1 (proc)); | |
0f2d19dd | 3181 | } |
6dbd0af5 | 3182 | } |
0f2d19dd JB |
3183 | |
3184 | /* must handle macros by here */ | |
3185 | x = SCM_CDR (x); | |
dff98306 DH |
3186 | if (SCM_CONSP (x)) |
3187 | arg1 = EVALCAR (x, env); | |
680ed4a8 | 3188 | else |
ab1f1094 | 3189 | scm_wrong_num_args (proc); |
6dbd0af5 | 3190 | #ifdef DEVAL |
dff98306 | 3191 | debug.info->a.args = scm_list_1 (arg1); |
6dbd0af5 | 3192 | #endif |
0f2d19dd | 3193 | x = SCM_CDR (x); |
42030fb2 DH |
3194 | { |
3195 | SCM arg2; | |
3196 | if (SCM_NULLP (x)) | |
3197 | { | |
3198 | ENTER_APPLY; | |
3199 | evap1: /* inputs: proc, arg1 */ | |
ddd8f927 | 3200 | SCM_ASRTGO (!SCM_IMP (proc), badfun); |
42030fb2 DH |
3201 | switch (SCM_TYP7 (proc)) |
3202 | { /* have one argument in arg1 */ | |
3203 | case scm_tc7_subr_2o: | |
3204 | RETURN (SCM_SUBRF (proc) (arg1, SCM_UNDEFINED)); | |
3205 | case scm_tc7_subr_1: | |
3206 | case scm_tc7_subr_1o: | |
3207 | RETURN (SCM_SUBRF (proc) (arg1)); | |
14b18ed6 DH |
3208 | case scm_tc7_dsubr: |
3209 | if (SCM_INUMP (arg1)) | |
3210 | { | |
3211 | RETURN (scm_make_real (SCM_DSUBRF (proc) ((double) SCM_INUM (arg1)))); | |
3212 | } | |
3213 | else if (SCM_REALP (arg1)) | |
3214 | { | |
3215 | RETURN (scm_make_real (SCM_DSUBRF (proc) (SCM_REAL_VALUE (arg1)))); | |
3216 | } | |
3217 | else if (SCM_BIGP (arg1)) | |
3218 | { | |
3219 | RETURN (scm_make_real (SCM_DSUBRF (proc) (scm_i_big2dbl (arg1)))); | |
3220 | } | |
3221 | SCM_WTA_DISPATCH_1 (*SCM_SUBR_GENERIC (proc), arg1, | |
3222 | SCM_ARG1, SCM_SYMBOL_CHARS (SCM_SNAME (proc))); | |
42030fb2 | 3223 | case scm_tc7_cxr: |
42030fb2 | 3224 | { |
14b18ed6 DH |
3225 | unsigned char pattern = (scm_t_bits) SCM_SUBRF (proc); |
3226 | do | |
3227 | { | |
3228 | SCM_ASSERT (SCM_CONSP (arg1), arg1, SCM_ARG1, | |
3229 | SCM_SYMBOL_CHARS (SCM_SNAME (proc))); | |
3230 | arg1 = (pattern & 1) ? SCM_CAR (arg1) : SCM_CDR (arg1); | |
3231 | pattern >>= 2; | |
3232 | } while (pattern); | |
42030fb2 | 3233 | RETURN (arg1); |
0f2d19dd | 3234 | } |
42030fb2 DH |
3235 | case scm_tc7_rpsubr: |
3236 | RETURN (SCM_BOOL_T); | |
3237 | case scm_tc7_asubr: | |
3238 | RETURN (SCM_SUBRF (proc) (arg1, SCM_UNDEFINED)); | |
3239 | case scm_tc7_lsubr: | |
0f2d19dd | 3240 | #ifdef DEVAL |
42030fb2 | 3241 | RETURN (SCM_SUBRF (proc) (debug.info->a.args)); |
0f2d19dd | 3242 | #else |
42030fb2 | 3243 | RETURN (SCM_SUBRF (proc) (scm_list_1 (arg1))); |
0f2d19dd | 3244 | #endif |
42030fb2 DH |
3245 | case scm_tc7_smob: |
3246 | if (!SCM_SMOB_APPLICABLE_P (proc)) | |
3247 | goto badfun; | |
3248 | RETURN (SCM_SMOB_APPLY_1 (proc, arg1)); | |
3249 | case scm_tc7_cclo: | |
3250 | arg2 = arg1; | |
3251 | arg1 = proc; | |
3252 | proc = SCM_CCLO_SUBR (proc); | |
6dbd0af5 | 3253 | #ifdef DEVAL |
42030fb2 DH |
3254 | debug.info->a.args = scm_cons (arg1, debug.info->a.args); |
3255 | debug.info->a.proc = proc; | |
6dbd0af5 | 3256 | #endif |
42030fb2 DH |
3257 | goto evap2; |
3258 | case scm_tc7_pws: | |
3259 | proc = SCM_PROCEDURE (proc); | |
89efbff4 | 3260 | #ifdef DEVAL |
42030fb2 | 3261 | debug.info->a.proc = proc; |
89efbff4 | 3262 | #endif |
42030fb2 DH |
3263 | if (!SCM_CLOSUREP (proc)) |
3264 | goto evap1; | |
ddd8f927 | 3265 | /* fallthrough */ |
42030fb2 | 3266 | case scm_tcs_closures: |
ddd8f927 DH |
3267 | { |
3268 | /* clos1: */ | |
3269 | const SCM formals = SCM_CLOSURE_FORMALS (proc); | |
3270 | if (SCM_NULLP (formals) | |
3271 | || (SCM_CONSP (formals) && SCM_CONSP (SCM_CDR (formals)))) | |
3272 | goto umwrongnumargs; | |
3273 | x = SCM_CLOSURE_BODY (proc); | |
0f2d19dd | 3274 | #ifdef DEVAL |
ddd8f927 DH |
3275 | env = SCM_EXTEND_ENV (formals, |
3276 | debug.info->a.args, | |
3277 | SCM_ENV (proc)); | |
0f2d19dd | 3278 | #else |
ddd8f927 DH |
3279 | env = SCM_EXTEND_ENV (formals, |
3280 | scm_list_1 (arg1), | |
3281 | SCM_ENV (proc)); | |
0f2d19dd | 3282 | #endif |
ddd8f927 DH |
3283 | goto nontoplevel_begin; |
3284 | } | |
42030fb2 DH |
3285 | case scm_tcs_struct: |
3286 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) | |
3287 | { | |
3288 | x = SCM_ENTITY_PROCEDURE (proc); | |
f3d2630a | 3289 | #ifdef DEVAL |
42030fb2 | 3290 | arg1 = debug.info->a.args; |
f3d2630a | 3291 | #else |
42030fb2 | 3292 | arg1 = scm_list_1 (arg1); |
f3d2630a | 3293 | #endif |
42030fb2 DH |
3294 | goto type_dispatch; |
3295 | } | |
2ca0d207 | 3296 | else if (SCM_I_OPERATORP (proc)) |
42030fb2 DH |
3297 | { |
3298 | arg2 = arg1; | |
3299 | arg1 = proc; | |
3300 | proc = (SCM_I_ENTITYP (proc) | |
3301 | ? SCM_ENTITY_PROCEDURE (proc) | |
3302 | : SCM_OPERATOR_PROCEDURE (proc)); | |
0c32d76c | 3303 | #ifdef DEVAL |
42030fb2 DH |
3304 | debug.info->a.args = scm_cons (arg1, debug.info->a.args); |
3305 | debug.info->a.proc = proc; | |
0c32d76c | 3306 | #endif |
ddd8f927 | 3307 | goto evap2; |
42030fb2 | 3308 | } |
2ca0d207 DH |
3309 | else |
3310 | goto badfun; | |
42030fb2 DH |
3311 | case scm_tc7_subr_2: |
3312 | case scm_tc7_subr_0: | |
3313 | case scm_tc7_subr_3: | |
3314 | case scm_tc7_lsubr_2: | |
ab1f1094 | 3315 | scm_wrong_num_args (proc); |
42030fb2 DH |
3316 | default: |
3317 | goto badfun; | |
3318 | } | |
3319 | } | |
42030fb2 DH |
3320 | if (SCM_CONSP (x)) |
3321 | arg2 = EVALCAR (x, env); | |
3322 | else | |
ab1f1094 | 3323 | scm_wrong_num_args (proc); |
bd987b8e | 3324 | |
42030fb2 | 3325 | { /* have two or more arguments */ |
6dbd0af5 | 3326 | #ifdef DEVAL |
42030fb2 | 3327 | debug.info->a.args = scm_list_2 (arg1, arg2); |
6dbd0af5 | 3328 | #endif |
42030fb2 DH |
3329 | x = SCM_CDR (x); |
3330 | if (SCM_NULLP (x)) { | |
3331 | ENTER_APPLY; | |
3332 | evap2: | |
ddd8f927 | 3333 | SCM_ASRTGO (!SCM_IMP (proc), badfun); |
42030fb2 DH |
3334 | switch (SCM_TYP7 (proc)) |
3335 | { /* have two arguments */ | |
3336 | case scm_tc7_subr_2: | |
3337 | case scm_tc7_subr_2o: | |
3338 | RETURN (SCM_SUBRF (proc) (arg1, arg2)); | |
3339 | case scm_tc7_lsubr: | |
0f2d19dd | 3340 | #ifdef DEVAL |
42030fb2 | 3341 | RETURN (SCM_SUBRF (proc) (debug.info->a.args)); |
6dbd0af5 | 3342 | #else |
42030fb2 DH |
3343 | RETURN (SCM_SUBRF (proc) (scm_list_2 (arg1, arg2))); |
3344 | #endif | |
3345 | case scm_tc7_lsubr_2: | |
3346 | RETURN (SCM_SUBRF (proc) (arg1, arg2, SCM_EOL)); | |
3347 | case scm_tc7_rpsubr: | |
3348 | case scm_tc7_asubr: | |
3349 | RETURN (SCM_SUBRF (proc) (arg1, arg2)); | |
3350 | case scm_tc7_smob: | |
3351 | if (!SCM_SMOB_APPLICABLE_P (proc)) | |
3352 | goto badfun; | |
3353 | RETURN (SCM_SMOB_APPLY_2 (proc, arg1, arg2)); | |
3354 | cclon: | |
3355 | case scm_tc7_cclo: | |
0f2d19dd | 3356 | #ifdef DEVAL |
42030fb2 DH |
3357 | RETURN (SCM_APPLY (SCM_CCLO_SUBR (proc), |
3358 | scm_cons (proc, debug.info->a.args), | |
3359 | SCM_EOL)); | |
0f2d19dd | 3360 | #else |
42030fb2 DH |
3361 | RETURN (SCM_APPLY (SCM_CCLO_SUBR (proc), |
3362 | scm_cons2 (proc, arg1, | |
3363 | scm_cons (arg2, | |
3364 | scm_eval_args (x, | |
3365 | env, | |
3366 | proc))), | |
3367 | SCM_EOL)); | |
3368 | #endif | |
3369 | case scm_tcs_struct: | |
3370 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) | |
3371 | { | |
3372 | x = SCM_ENTITY_PROCEDURE (proc); | |
3373 | #ifdef DEVAL | |
3374 | arg1 = debug.info->a.args; | |
3375 | #else | |
3376 | arg1 = scm_list_2 (arg1, arg2); | |
6dbd0af5 | 3377 | #endif |
42030fb2 DH |
3378 | goto type_dispatch; |
3379 | } | |
2ca0d207 | 3380 | else if (SCM_I_OPERATORP (proc)) |
42030fb2 DH |
3381 | { |
3382 | operatorn: | |
f3d2630a | 3383 | #ifdef DEVAL |
42030fb2 DH |
3384 | RETURN (SCM_APPLY (SCM_I_ENTITYP (proc) |
3385 | ? SCM_ENTITY_PROCEDURE (proc) | |
3386 | : SCM_OPERATOR_PROCEDURE (proc), | |
3387 | scm_cons (proc, debug.info->a.args), | |
3388 | SCM_EOL)); | |
f3d2630a | 3389 | #else |
42030fb2 DH |
3390 | RETURN (SCM_APPLY (SCM_I_ENTITYP (proc) |
3391 | ? SCM_ENTITY_PROCEDURE (proc) | |
3392 | : SCM_OPERATOR_PROCEDURE (proc), | |
3393 | scm_cons2 (proc, arg1, | |
3394 | scm_cons (arg2, | |
3395 | scm_eval_args (x, | |
3396 | env, | |
3397 | proc))), | |
3398 | SCM_EOL)); | |
f3d2630a | 3399 | #endif |
42030fb2 | 3400 | } |
2ca0d207 DH |
3401 | else |
3402 | goto badfun; | |
42030fb2 | 3403 | case scm_tc7_subr_0: |
14b18ed6 | 3404 | case scm_tc7_dsubr: |
42030fb2 DH |
3405 | case scm_tc7_cxr: |
3406 | case scm_tc7_subr_1o: | |
3407 | case scm_tc7_subr_1: | |
3408 | case scm_tc7_subr_3: | |
ab1f1094 | 3409 | scm_wrong_num_args (proc); |
42030fb2 | 3410 | default: |
9b07e212 | 3411 | goto badfun; |
42030fb2 DH |
3412 | case scm_tc7_pws: |
3413 | proc = SCM_PROCEDURE (proc); | |
3414 | #ifdef DEVAL | |
3415 | debug.info->a.proc = proc; | |
3416 | #endif | |
3417 | if (!SCM_CLOSUREP (proc)) | |
3418 | goto evap2; | |
ddd8f927 | 3419 | /* fallthrough */ |
42030fb2 | 3420 | case scm_tcs_closures: |
ddd8f927 DH |
3421 | { |
3422 | /* clos2: */ | |
3423 | const SCM formals = SCM_CLOSURE_FORMALS (proc); | |
3424 | if (SCM_NULLP (formals) | |
3425 | || (SCM_CONSP (formals) | |
3426 | && (SCM_NULLP (SCM_CDR (formals)) | |
3427 | || (SCM_CONSP (SCM_CDR (formals)) | |
3428 | && SCM_CONSP (SCM_CDDR (formals)))))) | |
3429 | goto umwrongnumargs; | |
0c32d76c | 3430 | #ifdef DEVAL |
ddd8f927 DH |
3431 | env = SCM_EXTEND_ENV (formals, |
3432 | debug.info->a.args, | |
3433 | SCM_ENV (proc)); | |
195847fa | 3434 | #else |
ddd8f927 DH |
3435 | env = SCM_EXTEND_ENV (formals, |
3436 | scm_list_2 (arg1, arg2), | |
3437 | SCM_ENV (proc)); | |
195847fa | 3438 | #endif |
ddd8f927 DH |
3439 | x = SCM_CLOSURE_BODY (proc); |
3440 | goto nontoplevel_begin; | |
3441 | } | |
42030fb2 DH |
3442 | } |
3443 | } | |
42030fb2 | 3444 | if (!SCM_CONSP (x)) |
ab1f1094 | 3445 | scm_wrong_num_args (proc); |
42030fb2 DH |
3446 | #ifdef DEVAL |
3447 | debug.info->a.args = scm_cons2 (arg1, arg2, | |
3448 | deval_args (x, env, proc, | |
3449 | SCM_CDRLOC (SCM_CDR (debug.info->a.args)))); | |
3450 | #endif | |
3451 | ENTER_APPLY; | |
3452 | evap3: | |
ddd8f927 | 3453 | SCM_ASRTGO (!SCM_IMP (proc), badfun); |
42030fb2 DH |
3454 | switch (SCM_TYP7 (proc)) |
3455 | { /* have 3 or more arguments */ | |
3456 | #ifdef DEVAL | |
6dbd0af5 | 3457 | case scm_tc7_subr_3: |
ab1f1094 DH |
3458 | if (!SCM_NULLP (SCM_CDR (x))) |
3459 | scm_wrong_num_args (proc); | |
3460 | else | |
3461 | RETURN (SCM_SUBRF (proc) (arg1, arg2, | |
3462 | SCM_CADDR (debug.info->a.args))); | |
42030fb2 DH |
3463 | case scm_tc7_asubr: |
3464 | arg1 = SCM_SUBRF(proc)(arg1, arg2); | |
3465 | arg2 = SCM_CDDR (debug.info->a.args); | |
3466 | do | |
3467 | { | |
3468 | arg1 = SCM_SUBRF(proc)(arg1, SCM_CAR (arg2)); | |
3469 | arg2 = SCM_CDR (arg2); | |
3470 | } | |
3471 | while (SCM_NIMP (arg2)); | |
3472 | RETURN (arg1); | |
3473 | case scm_tc7_rpsubr: | |
3474 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg1, arg2))) | |
3475 | RETURN (SCM_BOOL_F); | |
3476 | arg1 = SCM_CDDR (debug.info->a.args); | |
3477 | do | |
3478 | { | |
3479 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg2, SCM_CAR (arg1)))) | |
3480 | RETURN (SCM_BOOL_F); | |
3481 | arg2 = SCM_CAR (arg1); | |
3482 | arg1 = SCM_CDR (arg1); | |
3483 | } | |
3484 | while (SCM_NIMP (arg1)); | |
3485 | RETURN (SCM_BOOL_T); | |
3486 | case scm_tc7_lsubr_2: | |
3487 | RETURN (SCM_SUBRF (proc) (arg1, arg2, | |
3488 | SCM_CDDR (debug.info->a.args))); | |
3489 | case scm_tc7_lsubr: | |
3490 | RETURN (SCM_SUBRF (proc) (debug.info->a.args)); | |
3491 | case scm_tc7_smob: | |
3492 | if (!SCM_SMOB_APPLICABLE_P (proc)) | |
3493 | goto badfun; | |
3494 | RETURN (SCM_SMOB_APPLY_3 (proc, arg1, arg2, | |
3495 | SCM_CDDR (debug.info->a.args))); | |
3496 | case scm_tc7_cclo: | |
3497 | goto cclon; | |
002f1a5d MD |
3498 | case scm_tc7_pws: |
3499 | proc = SCM_PROCEDURE (proc); | |
002f1a5d | 3500 | debug.info->a.proc = proc; |
002f1a5d | 3501 | if (!SCM_CLOSUREP (proc)) |
42030fb2 | 3502 | goto evap3; |
ddd8f927 | 3503 | /* fallthrough */ |
6dbd0af5 | 3504 | case scm_tcs_closures: |
ddd8f927 DH |
3505 | { |
3506 | const SCM formals = SCM_CLOSURE_FORMALS (proc); | |
3507 | if (SCM_NULLP (formals) | |
3508 | || (SCM_CONSP (formals) | |
3509 | && (SCM_NULLP (SCM_CDR (formals)) | |
3510 | || (SCM_CONSP (SCM_CDR (formals)) | |
3511 | && scm_badargsp (SCM_CDDR (formals), x))))) | |
3512 | goto umwrongnumargs; | |
3513 | SCM_SET_ARGSREADY (debug); | |
3514 | env = SCM_EXTEND_ENV (formals, | |
3515 | debug.info->a.args, | |
3516 | SCM_ENV (proc)); | |
3517 | x = SCM_CLOSURE_BODY (proc); | |
3518 | goto nontoplevel_begin; | |
3519 | } | |
6dbd0af5 | 3520 | #else /* DEVAL */ |
42030fb2 | 3521 | case scm_tc7_subr_3: |
ab1f1094 DH |
3522 | if (!SCM_NULLP (SCM_CDR (x))) |
3523 | scm_wrong_num_args (proc); | |
3524 | else | |
3525 | RETURN (SCM_SUBRF (proc) (arg1, arg2, EVALCAR (x, env))); | |
42030fb2 DH |
3526 | case scm_tc7_asubr: |
3527 | arg1 = SCM_SUBRF (proc) (arg1, arg2); | |
3528 | do | |
3529 | { | |
3530 | arg1 = SCM_SUBRF(proc)(arg1, EVALCAR(x, env)); | |
3531 | x = SCM_CDR(x); | |
3532 | } | |
3533 | while (SCM_NIMP (x)); | |
3534 | RETURN (arg1); | |
3535 | case scm_tc7_rpsubr: | |
3536 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg1, arg2))) | |
3537 | RETURN (SCM_BOOL_F); | |
3538 | do | |
3539 | { | |
3540 | arg1 = EVALCAR (x, env); | |
3541 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg2, arg1))) | |
3542 | RETURN (SCM_BOOL_F); | |
3543 | arg2 = arg1; | |
3544 | x = SCM_CDR (x); | |
3545 | } | |
3546 | while (SCM_NIMP (x)); | |
3547 | RETURN (SCM_BOOL_T); | |
3548 | case scm_tc7_lsubr_2: | |
3549 | RETURN (SCM_SUBRF (proc) (arg1, arg2, scm_eval_args (x, env, proc))); | |
3550 | case scm_tc7_lsubr: | |
3551 | RETURN (SCM_SUBRF (proc) (scm_cons2 (arg1, | |
3552 | arg2, | |
3553 | scm_eval_args (x, env, proc)))); | |
3554 | case scm_tc7_smob: | |
3555 | if (!SCM_SMOB_APPLICABLE_P (proc)) | |
3556 | goto badfun; | |
3557 | RETURN (SCM_SMOB_APPLY_3 (proc, arg1, arg2, | |
3558 | scm_eval_args (x, env, proc))); | |
3559 | case scm_tc7_cclo: | |
3560 | goto cclon; | |
3561 | case scm_tc7_pws: | |
3562 | proc = SCM_PROCEDURE (proc); | |
3563 | if (!SCM_CLOSUREP (proc)) | |
3564 | goto evap3; | |
ddd8f927 DH |
3565 | /* fallthrough */ |
3566 | case scm_tcs_closures: | |
da7f71d7 | 3567 | { |
ddd8f927 | 3568 | const SCM formals = SCM_CLOSURE_FORMALS (proc); |
42030fb2 DH |
3569 | if (SCM_NULLP (formals) |
3570 | || (SCM_CONSP (formals) | |
3571 | && (SCM_NULLP (SCM_CDR (formals)) | |
3572 | || (SCM_CONSP (SCM_CDR (formals)) | |
3573 | && scm_badargsp (SCM_CDDR (formals), x))))) | |
3574 | goto umwrongnumargs; | |
ddd8f927 DH |
3575 | env = SCM_EXTEND_ENV (formals, |
3576 | scm_cons2 (arg1, | |
3577 | arg2, | |
3578 | scm_eval_args (x, env, proc)), | |
3579 | SCM_ENV (proc)); | |
3580 | x = SCM_CLOSURE_BODY (proc); | |
3581 | goto nontoplevel_begin; | |
da7f71d7 | 3582 | } |
0f2d19dd | 3583 | #endif /* DEVAL */ |
42030fb2 DH |
3584 | case scm_tcs_struct: |
3585 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) | |
3586 | { | |
f3d2630a | 3587 | #ifdef DEVAL |
42030fb2 | 3588 | arg1 = debug.info->a.args; |
f3d2630a | 3589 | #else |
42030fb2 | 3590 | arg1 = scm_cons2 (arg1, arg2, scm_eval_args (x, env, proc)); |
f3d2630a | 3591 | #endif |
42030fb2 DH |
3592 | x = SCM_ENTITY_PROCEDURE (proc); |
3593 | goto type_dispatch; | |
3594 | } | |
2ca0d207 | 3595 | else if (SCM_I_OPERATORP (proc)) |
42030fb2 | 3596 | goto operatorn; |
2ca0d207 DH |
3597 | else |
3598 | goto badfun; | |
42030fb2 DH |
3599 | case scm_tc7_subr_2: |
3600 | case scm_tc7_subr_1o: | |
3601 | case scm_tc7_subr_2o: | |
3602 | case scm_tc7_subr_0: | |
14b18ed6 | 3603 | case scm_tc7_dsubr: |
42030fb2 DH |
3604 | case scm_tc7_cxr: |
3605 | case scm_tc7_subr_1: | |
ab1f1094 | 3606 | scm_wrong_num_args (proc); |
42030fb2 | 3607 | default: |
9b07e212 | 3608 | goto badfun; |
42030fb2 DH |
3609 | } |
3610 | } | |
0f2d19dd JB |
3611 | } |
3612 | #ifdef DEVAL | |
6dbd0af5 | 3613 | exit: |
5132eef0 | 3614 | if (scm_check_exit_p && SCM_TRAPS_P) |
b7ff98dd | 3615 | if (SCM_EXIT_FRAME_P || (SCM_TRACE_P && SCM_TRACED_FRAME_P (debug))) |
6dbd0af5 | 3616 | { |
b7ff98dd MD |
3617 | SCM_CLEAR_TRACED_FRAME (debug); |
3618 | if (SCM_CHEAPTRAPS_P) | |
dff98306 | 3619 | arg1 = scm_make_debugobj (&debug); |
6dbd0af5 MD |
3620 | else |
3621 | { | |
5f144b10 GH |
3622 | int first; |
3623 | SCM val = scm_make_continuation (&first); | |
e050d4f8 | 3624 | |
5f144b10 | 3625 | if (first) |
dff98306 | 3626 | arg1 = val; |
5f144b10 | 3627 | else |
6dbd0af5 | 3628 | { |
5f144b10 | 3629 | proc = val; |
6dbd0af5 MD |
3630 | goto ret; |
3631 | } | |
3632 | } | |
d95c0b76 | 3633 | SCM_TRAPS_P = 0; |
dff98306 | 3634 | scm_call_3 (SCM_EXIT_FRAME_HDLR, scm_sym_exit_frame, arg1, proc); |
d95c0b76 | 3635 | SCM_TRAPS_P = 1; |
6dbd0af5 MD |
3636 | } |
3637 | ret: | |
1646d37b | 3638 | scm_last_debug_frame = debug.prev; |
0f2d19dd JB |
3639 | return proc; |
3640 | #endif | |
3641 | } | |
3642 | ||
6dbd0af5 MD |
3643 | |
3644 | /* SECTION: This code is compiled once. | |
3645 | */ | |
3646 | ||
0f2d19dd JB |
3647 | #ifndef DEVAL |
3648 | ||
fdc28395 | 3649 | \f |
d0b07b5d | 3650 | |
fdc28395 KN |
3651 | /* Simple procedure calls |
3652 | */ | |
3653 | ||
3654 | SCM | |
3655 | scm_call_0 (SCM proc) | |
3656 | { | |
3657 | return scm_apply (proc, SCM_EOL, SCM_EOL); | |
3658 | } | |
3659 | ||
3660 | SCM | |
3661 | scm_call_1 (SCM proc, SCM arg1) | |
3662 | { | |
3663 | return scm_apply (proc, arg1, scm_listofnull); | |
3664 | } | |
3665 | ||
3666 | SCM | |
3667 | scm_call_2 (SCM proc, SCM arg1, SCM arg2) | |
3668 | { | |
3669 | return scm_apply (proc, arg1, scm_cons (arg2, scm_listofnull)); | |
3670 | } | |
3671 | ||
3672 | SCM | |
3673 | scm_call_3 (SCM proc, SCM arg1, SCM arg2, SCM arg3) | |
3674 | { | |
3675 | return scm_apply (proc, arg1, scm_cons2 (arg2, arg3, scm_listofnull)); | |
3676 | } | |
3677 | ||
d95c0b76 NJ |
3678 | SCM |
3679 | scm_call_4 (SCM proc, SCM arg1, SCM arg2, SCM arg3, SCM arg4) | |
3680 | { | |
3681 | return scm_apply (proc, arg1, scm_cons2 (arg2, arg3, | |
3682 | scm_cons (arg4, scm_listofnull))); | |
3683 | } | |
3684 | ||
fdc28395 KN |
3685 | /* Simple procedure applies |
3686 | */ | |
3687 | ||
3688 | SCM | |
3689 | scm_apply_0 (SCM proc, SCM args) | |
3690 | { | |
3691 | return scm_apply (proc, args, SCM_EOL); | |
3692 | } | |
3693 | ||
3694 | SCM | |
3695 | scm_apply_1 (SCM proc, SCM arg1, SCM args) | |
3696 | { | |
3697 | return scm_apply (proc, scm_cons (arg1, args), SCM_EOL); | |
3698 | } | |
3699 | ||
3700 | SCM | |
3701 | scm_apply_2 (SCM proc, SCM arg1, SCM arg2, SCM args) | |
3702 | { | |
3703 | return scm_apply (proc, scm_cons2 (arg1, arg2, args), SCM_EOL); | |
3704 | } | |
3705 | ||
3706 | SCM | |
3707 | scm_apply_3 (SCM proc, SCM arg1, SCM arg2, SCM arg3, SCM args) | |
3708 | { | |
3709 | return scm_apply (proc, scm_cons (arg1, scm_cons2 (arg2, arg3, args)), | |
3710 | SCM_EOL); | |
3711 | } | |
3712 | ||
82a2622a | 3713 | /* This code processes the arguments to apply: |
b145c172 JB |
3714 | |
3715 | (apply PROC ARG1 ... ARGS) | |
3716 | ||
82a2622a JB |
3717 | Given a list (ARG1 ... ARGS), this function conses the ARG1 |
3718 | ... arguments onto the front of ARGS, and returns the resulting | |
3719 | list. Note that ARGS is a list; thus, the argument to this | |
3720 | function is a list whose last element is a list. | |
3721 | ||
3722 | Apply calls this function, and applies PROC to the elements of the | |
b145c172 JB |
3723 | result. apply:nconc2last takes care of building the list of |
3724 | arguments, given (ARG1 ... ARGS). | |
3725 | ||
82a2622a JB |
3726 | Rather than do new consing, apply:nconc2last destroys its argument. |
3727 | On that topic, this code came into my care with the following | |
3728 | beautifully cryptic comment on that topic: "This will only screw | |
3729 | you if you do (scm_apply scm_apply '( ... ))" If you know what | |
3730 | they're referring to, send me a patch to this comment. */ | |
b145c172 | 3731 | |
3b3b36dd | 3732 | SCM_DEFINE (scm_nconc2last, "apply:nconc2last", 1, 0, 0, |
b3f26b14 MG |
3733 | (SCM lst), |
3734 | "Given a list (@var{arg1} @dots{} @var{args}), this function\n" | |
3735 | "conses the @var{arg1} @dots{} arguments onto the front of\n" | |
3736 | "@var{args}, and returns the resulting list. Note that\n" | |
3737 | "@var{args} is a list; thus, the argument to this function is\n" | |
3738 | "a list whose last element is a list.\n" | |
3739 | "Note: Rather than do new consing, @code{apply:nconc2last}\n" | |
3740 | "destroys its argument, so use with care.") | |
1bbd0b84 | 3741 | #define FUNC_NAME s_scm_nconc2last |
0f2d19dd JB |
3742 | { |
3743 | SCM *lloc; | |
34d19ef6 | 3744 | SCM_VALIDATE_NONEMPTYLIST (1, lst); |
0f2d19dd | 3745 | lloc = &lst; |
c96d76b8 NJ |
3746 | while (!SCM_NULLP (SCM_CDR (*lloc))) /* Perhaps should be |
3747 | SCM_NULL_OR_NIL_P, but not | |
3748 | needed in 99.99% of cases, | |
3749 | and it could seriously hurt | |
3750 | performance. - Neil */ | |
a23afe53 | 3751 | lloc = SCM_CDRLOC (*lloc); |
1bbd0b84 | 3752 | SCM_ASSERT (scm_ilength (SCM_CAR (*lloc)) >= 0, lst, SCM_ARG1, FUNC_NAME); |
0f2d19dd JB |
3753 | *lloc = SCM_CAR (*lloc); |
3754 | return lst; | |
3755 | } | |
1bbd0b84 | 3756 | #undef FUNC_NAME |
0f2d19dd JB |
3757 | |
3758 | #endif /* !DEVAL */ | |
3759 | ||
6dbd0af5 MD |
3760 | |
3761 | /* SECTION: When DEVAL is defined this code yields scm_dapply. | |
3762 | * It is compiled twice. | |
3763 | */ | |
3764 | ||
0f2d19dd | 3765 | #if 0 |
0f2d19dd | 3766 | SCM |
6e8d25a6 | 3767 | scm_apply (SCM proc, SCM arg1, SCM args) |
0f2d19dd JB |
3768 | {} |
3769 | #endif | |
3770 | ||
3771 | #if 0 | |
0f2d19dd | 3772 | SCM |
6e8d25a6 | 3773 | scm_dapply (SCM proc, SCM arg1, SCM args) |
d0b07b5d | 3774 | {} |
0f2d19dd JB |
3775 | #endif |
3776 | ||
1cc91f1b | 3777 | |
82a2622a JB |
3778 | /* Apply a function to a list of arguments. |
3779 | ||
3780 | This function is exported to the Scheme level as taking two | |
3781 | required arguments and a tail argument, as if it were: | |
3782 | (lambda (proc arg1 . args) ...) | |
3783 | Thus, if you just have a list of arguments to pass to a procedure, | |
3784 | pass the list as ARG1, and '() for ARGS. If you have some fixed | |
3785 | args, pass the first as ARG1, then cons any remaining fixed args | |
3786 | onto the front of your argument list, and pass that as ARGS. */ | |
3787 | ||
0f2d19dd | 3788 | SCM |
1bbd0b84 | 3789 | SCM_APPLY (SCM proc, SCM arg1, SCM args) |
0f2d19dd | 3790 | { |
0f2d19dd | 3791 | #ifdef DEVAL |
92c2555f MV |
3792 | scm_t_debug_frame debug; |
3793 | scm_t_debug_info debug_vect_body; | |
1646d37b | 3794 | debug.prev = scm_last_debug_frame; |
b7ff98dd | 3795 | debug.status = SCM_APPLYFRAME; |
c0ab1b8d | 3796 | debug.vect = &debug_vect_body; |
6dbd0af5 MD |
3797 | debug.vect[0].a.proc = proc; |
3798 | debug.vect[0].a.args = SCM_EOL; | |
1646d37b | 3799 | scm_last_debug_frame = &debug; |
0f2d19dd | 3800 | #else |
b7ff98dd | 3801 | if (SCM_DEBUGGINGP) |
0f2d19dd | 3802 | return scm_dapply (proc, arg1, args); |
0f2d19dd JB |
3803 | #endif |
3804 | ||
3805 | SCM_ASRTGO (SCM_NIMP (proc), badproc); | |
82a2622a JB |
3806 | |
3807 | /* If ARGS is the empty list, then we're calling apply with only two | |
3808 | arguments --- ARG1 is the list of arguments for PROC. Whatever | |
3809 | the case, futz with things so that ARG1 is the first argument to | |
3810 | give to PROC (or SCM_UNDEFINED if no args), and ARGS contains the | |
30000774 JB |
3811 | rest. |
3812 | ||
3813 | Setting the debug apply frame args this way is pretty messy. | |
3814 | Perhaps we should store arg1 and args directly in the frame as | |
3815 | received, and let scm_frame_arguments unpack them, because that's | |
3816 | a relatively rare operation. This works for now; if the Guile | |
3817 | developer archives are still around, see Mikael's post of | |
3818 | 11-Apr-97. */ | |
0f2d19dd JB |
3819 | if (SCM_NULLP (args)) |
3820 | { | |
3821 | if (SCM_NULLP (arg1)) | |
30000774 JB |
3822 | { |
3823 | arg1 = SCM_UNDEFINED; | |
3824 | #ifdef DEVAL | |
3825 | debug.vect[0].a.args = SCM_EOL; | |
3826 | #endif | |
3827 | } | |
0f2d19dd JB |
3828 | else |
3829 | { | |
30000774 JB |
3830 | #ifdef DEVAL |
3831 | debug.vect[0].a.args = arg1; | |
3832 | #endif | |
0f2d19dd JB |
3833 | args = SCM_CDR (arg1); |
3834 | arg1 = SCM_CAR (arg1); | |
3835 | } | |
3836 | } | |
3837 | else | |
3838 | { | |
0f2d19dd | 3839 | args = scm_nconc2last (args); |
30000774 JB |
3840 | #ifdef DEVAL |
3841 | debug.vect[0].a.args = scm_cons (arg1, args); | |
3842 | #endif | |
0f2d19dd | 3843 | } |
0f2d19dd | 3844 | #ifdef DEVAL |
b6d75948 | 3845 | if (SCM_ENTER_FRAME_P && SCM_TRAPS_P) |
6dbd0af5 MD |
3846 | { |
3847 | SCM tmp; | |
b7ff98dd | 3848 | if (SCM_CHEAPTRAPS_P) |
c0ab1b8d | 3849 | tmp = scm_make_debugobj (&debug); |
6dbd0af5 MD |
3850 | else |
3851 | { | |
5f144b10 GH |
3852 | int first; |
3853 | ||
3854 | tmp = scm_make_continuation (&first); | |
3855 | if (!first) | |
6dbd0af5 MD |
3856 | goto entap; |
3857 | } | |
d95c0b76 NJ |
3858 | SCM_TRAPS_P = 0; |
3859 | scm_call_2 (SCM_ENTER_FRAME_HDLR, scm_sym_enter_frame, tmp); | |
3860 | SCM_TRAPS_P = 1; | |
6dbd0af5 MD |
3861 | } |
3862 | entap: | |
3863 | ENTER_APPLY; | |
3864 | #endif | |
6dbd0af5 | 3865 | tail: |
0f2d19dd JB |
3866 | switch (SCM_TYP7 (proc)) |
3867 | { | |
3868 | case scm_tc7_subr_2o: | |
3869 | args = SCM_NULLP (args) ? SCM_UNDEFINED : SCM_CAR (args); | |
ddea3325 | 3870 | RETURN (SCM_SUBRF (proc) (arg1, args)); |
0f2d19dd | 3871 | case scm_tc7_subr_2: |
ab1f1094 DH |
3872 | if (SCM_NULLP (args) || !SCM_NULLP (SCM_CDR (args))) |
3873 | scm_wrong_num_args (proc); | |
0f2d19dd | 3874 | args = SCM_CAR (args); |
ddea3325 | 3875 | RETURN (SCM_SUBRF (proc) (arg1, args)); |
0f2d19dd | 3876 | case scm_tc7_subr_0: |
ab1f1094 DH |
3877 | if (!SCM_UNBNDP (arg1)) |
3878 | scm_wrong_num_args (proc); | |
3879 | else | |
3880 | RETURN (SCM_SUBRF (proc) ()); | |
0f2d19dd | 3881 | case scm_tc7_subr_1: |
ab1f1094 DH |
3882 | if (SCM_UNBNDP (arg1)) |
3883 | scm_wrong_num_args (proc); | |
0f2d19dd | 3884 | case scm_tc7_subr_1o: |
ab1f1094 DH |
3885 | if (!SCM_NULLP (args)) |
3886 | scm_wrong_num_args (proc); | |
3887 | else | |
3888 | RETURN (SCM_SUBRF (proc) (arg1)); | |
14b18ed6 DH |
3889 | case scm_tc7_dsubr: |
3890 | if (SCM_UNBNDP (arg1) || !SCM_NULLP (args)) | |
3891 | scm_wrong_num_args (proc); | |
3892 | if (SCM_INUMP (arg1)) | |
3893 | { | |
3894 | RETURN (scm_make_real (SCM_DSUBRF (proc) ((double) SCM_INUM (arg1)))); | |
3895 | } | |
3896 | else if (SCM_REALP (arg1)) | |
3897 | { | |
3898 | RETURN (scm_make_real (SCM_DSUBRF (proc) (SCM_REAL_VALUE (arg1)))); | |
3899 | } | |
3900 | else if (SCM_BIGP (arg1)) | |
3901 | RETURN (scm_make_real (SCM_DSUBRF (proc) (scm_i_big2dbl (arg1)))); | |
3902 | SCM_WTA_DISPATCH_1 (*SCM_SUBR_GENERIC (proc), arg1, | |
3903 | SCM_ARG1, SCM_SYMBOL_CHARS (SCM_SNAME (proc))); | |
0f2d19dd | 3904 | case scm_tc7_cxr: |
ab1f1094 DH |
3905 | if (SCM_UNBNDP (arg1) || !SCM_NULLP (args)) |
3906 | scm_wrong_num_args (proc); | |
0f2d19dd | 3907 | { |
14b18ed6 DH |
3908 | unsigned char pattern = (scm_t_bits) SCM_SUBRF (proc); |
3909 | do | |
3910 | { | |
3911 | SCM_ASSERT (SCM_CONSP (arg1), arg1, SCM_ARG1, | |
3912 | SCM_SYMBOL_CHARS (SCM_SNAME (proc))); | |
3913 | arg1 = (pattern & 1) ? SCM_CAR (arg1) : SCM_CDR (arg1); | |
3914 | pattern >>= 2; | |
3915 | } while (pattern); | |
3916 | RETURN (arg1); | |
0f2d19dd JB |
3917 | } |
3918 | case scm_tc7_subr_3: | |
ab1f1094 DH |
3919 | if (SCM_NULLP (args) |
3920 | || SCM_NULLP (SCM_CDR (args)) | |
3921 | || !SCM_NULLP (SCM_CDDR (args))) | |
3922 | scm_wrong_num_args (proc); | |
3923 | else | |
3924 | RETURN (SCM_SUBRF (proc) (arg1, SCM_CAR (args), SCM_CADR (args))); | |
0f2d19dd JB |
3925 | case scm_tc7_lsubr: |
3926 | #ifdef DEVAL | |
ddea3325 | 3927 | RETURN (SCM_SUBRF (proc) (SCM_UNBNDP (arg1) ? SCM_EOL : debug.vect[0].a.args)); |
0f2d19dd | 3928 | #else |
ddea3325 | 3929 | RETURN (SCM_SUBRF (proc) (SCM_UNBNDP (arg1) ? SCM_EOL : scm_cons (arg1, args))); |
0f2d19dd JB |
3930 | #endif |
3931 | case scm_tc7_lsubr_2: | |
ab1f1094 DH |
3932 | if (!SCM_CONSP (args)) |
3933 | scm_wrong_num_args (proc); | |
3934 | else | |
3935 | RETURN (SCM_SUBRF (proc) (arg1, SCM_CAR (args), SCM_CDR (args))); | |
0f2d19dd JB |
3936 | case scm_tc7_asubr: |
3937 | if (SCM_NULLP (args)) | |
ddea3325 | 3938 | RETURN (SCM_SUBRF (proc) (arg1, SCM_UNDEFINED)); |
0f2d19dd JB |
3939 | while (SCM_NIMP (args)) |
3940 | { | |
3941 | SCM_ASSERT (SCM_CONSP (args), args, SCM_ARG2, "apply"); | |
3942 | arg1 = SCM_SUBRF (proc) (arg1, SCM_CAR (args)); | |
3943 | args = SCM_CDR (args); | |
3944 | } | |
3945 | RETURN (arg1); | |
3946 | case scm_tc7_rpsubr: | |
3947 | if (SCM_NULLP (args)) | |
3948 | RETURN (SCM_BOOL_T); | |
3949 | while (SCM_NIMP (args)) | |
3950 | { | |
3951 | SCM_ASSERT (SCM_CONSP (args), args, SCM_ARG2, "apply"); | |
3952 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg1, SCM_CAR (args)))) | |
3953 | RETURN (SCM_BOOL_F); | |
3954 | arg1 = SCM_CAR (args); | |
3955 | args = SCM_CDR (args); | |
3956 | } | |
3957 | RETURN (SCM_BOOL_T); | |
3958 | case scm_tcs_closures: | |
3959 | #ifdef DEVAL | |
6dbd0af5 | 3960 | arg1 = (SCM_UNBNDP (arg1) ? SCM_EOL : debug.vect[0].a.args); |
0f2d19dd JB |
3961 | #else |
3962 | arg1 = (SCM_UNBNDP (arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
3963 | #endif | |
726d810a | 3964 | if (scm_badargsp (SCM_CLOSURE_FORMALS (proc), arg1)) |
ab1f1094 | 3965 | scm_wrong_num_args (proc); |
1609038c MD |
3966 | |
3967 | /* Copy argument list */ | |
3968 | if (SCM_IMP (arg1)) | |
3969 | args = arg1; | |
3970 | else | |
3971 | { | |
3972 | SCM tl = args = scm_cons (SCM_CAR (arg1), SCM_UNSPECIFIED); | |
05b15362 | 3973 | for (arg1 = SCM_CDR (arg1); SCM_CONSP (arg1); arg1 = SCM_CDR (arg1)) |
1609038c | 3974 | { |
05b15362 | 3975 | SCM_SETCDR (tl, scm_cons (SCM_CAR (arg1), SCM_UNSPECIFIED)); |
1609038c MD |
3976 | tl = SCM_CDR (tl); |
3977 | } | |
3978 | SCM_SETCDR (tl, arg1); | |
3979 | } | |
3980 | ||
821f18a4 DH |
3981 | args = SCM_EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), |
3982 | args, | |
3983 | SCM_ENV (proc)); | |
f9450cdb | 3984 | proc = SCM_CLOSURE_BODY (proc); |
e791c18f | 3985 | again: |
05b15362 DH |
3986 | arg1 = SCM_CDR (proc); |
3987 | while (!SCM_NULLP (arg1)) | |
2ddb0920 MD |
3988 | { |
3989 | if (SCM_IMP (SCM_CAR (proc))) | |
3990 | { | |
3991 | if (SCM_ISYMP (SCM_CAR (proc))) | |
3992 | { | |
28d52ebb | 3993 | scm_rec_mutex_lock (&source_mutex); |
9bc4701c MD |
3994 | /* check for race condition */ |
3995 | if (SCM_ISYMP (SCM_CAR (proc))) | |
3996 | proc = scm_m_expand_body (proc, args); | |
28d52ebb | 3997 | scm_rec_mutex_unlock (&source_mutex); |
e791c18f | 3998 | goto again; |
2ddb0920 | 3999 | } |
5280aaca | 4000 | else |
17fa3fcf | 4001 | SCM_VALIDATE_NON_EMPTY_COMBINATION (SCM_CAR (proc)); |
2ddb0920 MD |
4002 | } |
4003 | else | |
e791c18f MD |
4004 | SCM_CEVAL (SCM_CAR (proc), args); |
4005 | proc = arg1; | |
05b15362 | 4006 | arg1 = SCM_CDR (proc); |
2ddb0920 | 4007 | } |
e791c18f | 4008 | RETURN (EVALCAR (proc, args)); |
0717dfd8 | 4009 | case scm_tc7_smob: |
68b06924 | 4010 | if (!SCM_SMOB_APPLICABLE_P (proc)) |
0717dfd8 | 4011 | goto badproc; |
afa38f6e | 4012 | if (SCM_UNBNDP (arg1)) |
ddea3325 | 4013 | RETURN (SCM_SMOB_APPLY_0 (proc)); |
afa38f6e | 4014 | else if (SCM_NULLP (args)) |
ddea3325 | 4015 | RETURN (SCM_SMOB_APPLY_1 (proc, arg1)); |
0717dfd8 | 4016 | else if (SCM_NULLP (SCM_CDR (args))) |
ddea3325 | 4017 | RETURN (SCM_SMOB_APPLY_2 (proc, arg1, SCM_CAR (args))); |
0717dfd8 | 4018 | else |
68b06924 | 4019 | RETURN (SCM_SMOB_APPLY_3 (proc, arg1, SCM_CAR (args), SCM_CDR (args))); |
0f2d19dd JB |
4020 | case scm_tc7_cclo: |
4021 | #ifdef DEVAL | |
6dbd0af5 MD |
4022 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : debug.vect[0].a.args); |
4023 | arg1 = proc; | |
4024 | proc = SCM_CCLO_SUBR (proc); | |
4025 | debug.vect[0].a.proc = proc; | |
4026 | debug.vect[0].a.args = scm_cons (arg1, args); | |
0f2d19dd JB |
4027 | #else |
4028 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
0f2d19dd JB |
4029 | arg1 = proc; |
4030 | proc = SCM_CCLO_SUBR (proc); | |
6dbd0af5 | 4031 | #endif |
0f2d19dd | 4032 | goto tail; |
89efbff4 MD |
4033 | case scm_tc7_pws: |
4034 | proc = SCM_PROCEDURE (proc); | |
4035 | #ifdef DEVAL | |
4036 | debug.vect[0].a.proc = proc; | |
4037 | #endif | |
4038 | goto tail; | |
904a077d | 4039 | case scm_tcs_struct: |
f3d2630a MD |
4040 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) |
4041 | { | |
4042 | #ifdef DEVAL | |
4043 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : debug.vect[0].a.args); | |
4044 | #else | |
4045 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
4046 | #endif | |
195847fa | 4047 | RETURN (scm_apply_generic (proc, args)); |
f3d2630a | 4048 | } |
2ca0d207 | 4049 | else if (SCM_I_OPERATORP (proc)) |
da7f71d7 | 4050 | { |
504d99c5 | 4051 | /* operator */ |
da7f71d7 MD |
4052 | #ifdef DEVAL |
4053 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : debug.vect[0].a.args); | |
4054 | #else | |
4055 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
4056 | #endif | |
4057 | arg1 = proc; | |
195847fa MD |
4058 | proc = (SCM_I_ENTITYP (proc) |
4059 | ? SCM_ENTITY_PROCEDURE (proc) | |
4060 | : SCM_OPERATOR_PROCEDURE (proc)); | |
da7f71d7 MD |
4061 | #ifdef DEVAL |
4062 | debug.vect[0].a.proc = proc; | |
4063 | debug.vect[0].a.args = scm_cons (arg1, args); | |
4064 | #endif | |
195847fa MD |
4065 | if (SCM_NIMP (proc)) |
4066 | goto tail; | |
4067 | else | |
4068 | goto badproc; | |
da7f71d7 | 4069 | } |
2ca0d207 DH |
4070 | else |
4071 | goto badproc; | |
0f2d19dd JB |
4072 | default: |
4073 | badproc: | |
db4b4ca6 | 4074 | scm_wrong_type_arg ("apply", SCM_ARG1, proc); |
0f2d19dd JB |
4075 | } |
4076 | #ifdef DEVAL | |
6dbd0af5 | 4077 | exit: |
5132eef0 | 4078 | if (scm_check_exit_p && SCM_TRAPS_P) |
b7ff98dd | 4079 | if (SCM_EXIT_FRAME_P || (SCM_TRACE_P && SCM_TRACED_FRAME_P (debug))) |
6dbd0af5 | 4080 | { |
b7ff98dd MD |
4081 | SCM_CLEAR_TRACED_FRAME (debug); |
4082 | if (SCM_CHEAPTRAPS_P) | |
c0ab1b8d | 4083 | arg1 = scm_make_debugobj (&debug); |
6dbd0af5 MD |
4084 | else |
4085 | { | |
5f144b10 GH |
4086 | int first; |
4087 | SCM val = scm_make_continuation (&first); | |
4088 | ||
4089 | if (first) | |
4090 | arg1 = val; | |
4091 | else | |
6dbd0af5 | 4092 | { |
5f144b10 | 4093 | proc = val; |
6dbd0af5 MD |
4094 | goto ret; |
4095 | } | |
4096 | } | |
d95c0b76 NJ |
4097 | SCM_TRAPS_P = 0; |
4098 | scm_call_3 (SCM_EXIT_FRAME_HDLR, scm_sym_exit_frame, arg1, proc); | |
4099 | SCM_TRAPS_P = 1; | |
6dbd0af5 MD |
4100 | } |
4101 | ret: | |
1646d37b | 4102 | scm_last_debug_frame = debug.prev; |
0f2d19dd JB |
4103 | return proc; |
4104 | #endif | |
4105 | } | |
4106 | ||
6dbd0af5 MD |
4107 | |
4108 | /* SECTION: The rest of this file is only read once. | |
4109 | */ | |
4110 | ||
0f2d19dd JB |
4111 | #ifndef DEVAL |
4112 | ||
504d99c5 MD |
4113 | /* Trampolines |
4114 | * | |
4115 | * Trampolines make it possible to move procedure application dispatch | |
4116 | * outside inner loops. The motivation was clean implementation of | |
4117 | * efficient replacements of R5RS primitives in SRFI-1. | |
4118 | * | |
4119 | * The semantics is clear: scm_trampoline_N returns an optimized | |
4120 | * version of scm_call_N (or NULL if the procedure isn't applicable | |
4121 | * on N args). | |
4122 | * | |
4123 | * Applying the optimization to map and for-each increased efficiency | |
4124 | * noticeably. For example, (map abs ls) is now 8 times faster than | |
4125 | * before. | |
4126 | */ | |
4127 | ||
756414cf MD |
4128 | static SCM |
4129 | call_subr0_0 (SCM proc) | |
4130 | { | |
4131 | return SCM_SUBRF (proc) (); | |
4132 | } | |
4133 | ||
4134 | static SCM | |
4135 | call_subr1o_0 (SCM proc) | |
4136 | { | |
4137 | return SCM_SUBRF (proc) (SCM_UNDEFINED); | |
4138 | } | |
4139 | ||
4140 | static SCM | |
4141 | call_lsubr_0 (SCM proc) | |
4142 | { | |
4143 | return SCM_SUBRF (proc) (SCM_EOL); | |
4144 | } | |
4145 | ||
4146 | SCM | |
4147 | scm_i_call_closure_0 (SCM proc) | |
4148 | { | |
6a3f13f0 DH |
4149 | const SCM env = SCM_EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), |
4150 | SCM_EOL, | |
4151 | SCM_ENV (proc)); | |
4152 | const SCM result = scm_eval_body (SCM_CLOSURE_BODY (proc), env); | |
d0b07b5d | 4153 | return result; |
756414cf MD |
4154 | } |
4155 | ||
4156 | scm_t_trampoline_0 | |
4157 | scm_trampoline_0 (SCM proc) | |
4158 | { | |
4159 | if (SCM_IMP (proc)) | |
d0b07b5d | 4160 | return NULL; |
756414cf MD |
4161 | if (SCM_DEBUGGINGP) |
4162 | return scm_call_0; | |
4163 | switch (SCM_TYP7 (proc)) | |
4164 | { | |
4165 | case scm_tc7_subr_0: | |
4166 | return call_subr0_0; | |
4167 | case scm_tc7_subr_1o: | |
4168 | return call_subr1o_0; | |
4169 | case scm_tc7_lsubr: | |
4170 | return call_lsubr_0; | |
4171 | case scm_tcs_closures: | |
4172 | { | |
4173 | SCM formals = SCM_CLOSURE_FORMALS (proc); | |
4b612c5b | 4174 | if (SCM_NULLP (formals) || !SCM_CONSP (formals)) |
756414cf MD |
4175 | return scm_i_call_closure_0; |
4176 | else | |
d0b07b5d | 4177 | return NULL; |
756414cf MD |
4178 | } |
4179 | case scm_tcs_struct: | |
4180 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) | |
4181 | return scm_call_generic_0; | |
2ca0d207 DH |
4182 | else if (SCM_I_OPERATORP (proc)) |
4183 | return scm_call_0; | |
4184 | return NULL; | |
756414cf MD |
4185 | case scm_tc7_smob: |
4186 | if (SCM_SMOB_APPLICABLE_P (proc)) | |
4187 | return SCM_SMOB_DESCRIPTOR (proc).apply_0; | |
4188 | else | |
d0b07b5d | 4189 | return NULL; |
756414cf MD |
4190 | case scm_tc7_asubr: |
4191 | case scm_tc7_rpsubr: | |
4192 | case scm_tc7_cclo: | |
4193 | case scm_tc7_pws: | |
4194 | return scm_call_0; | |
4195 | default: | |
d0b07b5d | 4196 | return NULL; /* not applicable on one arg */ |
756414cf MD |
4197 | } |
4198 | } | |
4199 | ||
504d99c5 MD |
4200 | static SCM |
4201 | call_subr1_1 (SCM proc, SCM arg1) | |
4202 | { | |
4203 | return SCM_SUBRF (proc) (arg1); | |
4204 | } | |
4205 | ||
9ed24633 MD |
4206 | static SCM |
4207 | call_subr2o_1 (SCM proc, SCM arg1) | |
4208 | { | |
4209 | return SCM_SUBRF (proc) (arg1, SCM_UNDEFINED); | |
4210 | } | |
4211 | ||
504d99c5 MD |
4212 | static SCM |
4213 | call_lsubr_1 (SCM proc, SCM arg1) | |
4214 | { | |
4215 | return SCM_SUBRF (proc) (scm_list_1 (arg1)); | |
4216 | } | |
4217 | ||
4218 | static SCM | |
4219 | call_dsubr_1 (SCM proc, SCM arg1) | |
4220 | { | |
4221 | if (SCM_INUMP (arg1)) | |
4222 | { | |
4223 | RETURN (scm_make_real (SCM_DSUBRF (proc) ((double) SCM_INUM (arg1)))); | |
4224 | } | |
4225 | else if (SCM_REALP (arg1)) | |
4226 | { | |
4227 | RETURN (scm_make_real (SCM_DSUBRF (proc) (SCM_REAL_VALUE (arg1)))); | |
4228 | } | |
504d99c5 MD |
4229 | else if (SCM_BIGP (arg1)) |
4230 | RETURN (scm_make_real (SCM_DSUBRF (proc) (scm_i_big2dbl (arg1)))); | |
504d99c5 MD |
4231 | SCM_WTA_DISPATCH_1 (*SCM_SUBR_GENERIC (proc), arg1, |
4232 | SCM_ARG1, SCM_SYMBOL_CHARS (SCM_SNAME (proc))); | |
4233 | } | |
4234 | ||
4235 | static SCM | |
4236 | call_cxr_1 (SCM proc, SCM arg1) | |
4237 | { | |
14b18ed6 DH |
4238 | unsigned char pattern = (scm_t_bits) SCM_SUBRF (proc); |
4239 | do | |
4240 | { | |
4241 | SCM_ASSERT (SCM_CONSP (arg1), arg1, SCM_ARG1, | |
4242 | SCM_SYMBOL_CHARS (SCM_SNAME (proc))); | |
4243 | arg1 = (pattern & 1) ? SCM_CAR (arg1) : SCM_CDR (arg1); | |
4244 | pattern >>= 2; | |
4245 | } while (pattern); | |
4246 | return arg1; | |
504d99c5 MD |
4247 | } |
4248 | ||
4249 | static SCM | |
4250 | call_closure_1 (SCM proc, SCM arg1) | |
4251 | { | |
6a3f13f0 DH |
4252 | const SCM env = SCM_EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), |
4253 | scm_list_1 (arg1), | |
4254 | SCM_ENV (proc)); | |
4255 | const SCM result = scm_eval_body (SCM_CLOSURE_BODY (proc), env); | |
d0b07b5d | 4256 | return result; |
504d99c5 MD |
4257 | } |
4258 | ||
4259 | scm_t_trampoline_1 | |
4260 | scm_trampoline_1 (SCM proc) | |
4261 | { | |
4262 | if (SCM_IMP (proc)) | |
d0b07b5d | 4263 | return NULL; |
504d99c5 MD |
4264 | if (SCM_DEBUGGINGP) |
4265 | return scm_call_1; | |
4266 | switch (SCM_TYP7 (proc)) | |
4267 | { | |
4268 | case scm_tc7_subr_1: | |
4269 | case scm_tc7_subr_1o: | |
4270 | return call_subr1_1; | |
9ed24633 MD |
4271 | case scm_tc7_subr_2o: |
4272 | return call_subr2o_1; | |
504d99c5 MD |
4273 | case scm_tc7_lsubr: |
4274 | return call_lsubr_1; | |
14b18ed6 DH |
4275 | case scm_tc7_dsubr: |
4276 | return call_dsubr_1; | |
504d99c5 | 4277 | case scm_tc7_cxr: |
14b18ed6 | 4278 | return call_cxr_1; |
504d99c5 MD |
4279 | case scm_tcs_closures: |
4280 | { | |
4281 | SCM formals = SCM_CLOSURE_FORMALS (proc); | |
4b612c5b MD |
4282 | if (!SCM_NULLP (formals) |
4283 | && (!SCM_CONSP (formals) || !SCM_CONSP (SCM_CDR (formals)))) | |
504d99c5 MD |
4284 | return call_closure_1; |
4285 | else | |
d0b07b5d | 4286 | return NULL; |
504d99c5 MD |
4287 | } |
4288 | case scm_tcs_struct: | |
4289 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) | |
4290 | return scm_call_generic_1; | |
2ca0d207 DH |
4291 | else if (SCM_I_OPERATORP (proc)) |
4292 | return scm_call_1; | |
4293 | return NULL; | |
504d99c5 MD |
4294 | case scm_tc7_smob: |
4295 | if (SCM_SMOB_APPLICABLE_P (proc)) | |
4296 | return SCM_SMOB_DESCRIPTOR (proc).apply_1; | |
4297 | else | |
d0b07b5d | 4298 | return NULL; |
504d99c5 MD |
4299 | case scm_tc7_asubr: |
4300 | case scm_tc7_rpsubr: | |
4301 | case scm_tc7_cclo: | |
4302 | case scm_tc7_pws: | |
4303 | return scm_call_1; | |
4304 | default: | |
d0b07b5d | 4305 | return NULL; /* not applicable on one arg */ |
504d99c5 MD |
4306 | } |
4307 | } | |
4308 | ||
4309 | static SCM | |
4310 | call_subr2_2 (SCM proc, SCM arg1, SCM arg2) | |
4311 | { | |
4312 | return SCM_SUBRF (proc) (arg1, arg2); | |
4313 | } | |
4314 | ||
9ed24633 MD |
4315 | static SCM |
4316 | call_lsubr2_2 (SCM proc, SCM arg1, SCM arg2) | |
4317 | { | |
4318 | return SCM_SUBRF (proc) (arg1, arg2, SCM_EOL); | |
4319 | } | |
4320 | ||
504d99c5 MD |
4321 | static SCM |
4322 | call_lsubr_2 (SCM proc, SCM arg1, SCM arg2) | |
4323 | { | |
4324 | return SCM_SUBRF (proc) (scm_list_2 (arg1, arg2)); | |
4325 | } | |
4326 | ||
4327 | static SCM | |
4328 | call_closure_2 (SCM proc, SCM arg1, SCM arg2) | |
4329 | { | |
6a3f13f0 DH |
4330 | const SCM env = SCM_EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), |
4331 | scm_list_2 (arg1, arg2), | |
4332 | SCM_ENV (proc)); | |
4333 | const SCM result = scm_eval_body (SCM_CLOSURE_BODY (proc), env); | |
d0b07b5d | 4334 | return result; |
504d99c5 MD |
4335 | } |
4336 | ||
4337 | scm_t_trampoline_2 | |
4338 | scm_trampoline_2 (SCM proc) | |
4339 | { | |
4340 | if (SCM_IMP (proc)) | |
d0b07b5d | 4341 | return NULL; |
504d99c5 MD |
4342 | if (SCM_DEBUGGINGP) |
4343 | return scm_call_2; | |
4344 | switch (SCM_TYP7 (proc)) | |
4345 | { | |
4346 | case scm_tc7_subr_2: | |
4347 | case scm_tc7_subr_2o: | |
4348 | case scm_tc7_rpsubr: | |
4349 | case scm_tc7_asubr: | |
4350 | return call_subr2_2; | |
9ed24633 MD |
4351 | case scm_tc7_lsubr_2: |
4352 | return call_lsubr2_2; | |
504d99c5 MD |
4353 | case scm_tc7_lsubr: |
4354 | return call_lsubr_2; | |
4355 | case scm_tcs_closures: | |
4356 | { | |
4357 | SCM formals = SCM_CLOSURE_FORMALS (proc); | |
4b612c5b MD |
4358 | if (!SCM_NULLP (formals) |
4359 | && (!SCM_CONSP (formals) | |
4360 | || (!SCM_NULLP (SCM_CDR (formals)) | |
4361 | && (!SCM_CONSP (SCM_CDR (formals)) | |
4362 | || !SCM_CONSP (SCM_CDDR (formals)))))) | |
504d99c5 MD |
4363 | return call_closure_2; |
4364 | else | |
d0b07b5d | 4365 | return NULL; |
504d99c5 MD |
4366 | } |
4367 | case scm_tcs_struct: | |
4368 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) | |
4369 | return scm_call_generic_2; | |
2ca0d207 DH |
4370 | else if (SCM_I_OPERATORP (proc)) |
4371 | return scm_call_2; | |
4372 | return NULL; | |
504d99c5 MD |
4373 | case scm_tc7_smob: |
4374 | if (SCM_SMOB_APPLICABLE_P (proc)) | |
4375 | return SCM_SMOB_DESCRIPTOR (proc).apply_2; | |
4376 | else | |
d0b07b5d | 4377 | return NULL; |
504d99c5 MD |
4378 | case scm_tc7_cclo: |
4379 | case scm_tc7_pws: | |
4380 | return scm_call_2; | |
4381 | default: | |
d0b07b5d | 4382 | return NULL; /* not applicable on two args */ |
504d99c5 MD |
4383 | } |
4384 | } | |
4385 | ||
d9c393f5 JB |
4386 | /* Typechecking for multi-argument MAP and FOR-EACH. |
4387 | ||
47c3f06d | 4388 | Verify that each element of the vector ARGV, except for the first, |
d9c393f5 | 4389 | is a proper list whose length is LEN. Attribute errors to WHO, |
47c3f06d | 4390 | and claim that the i'th element of ARGV is WHO's i+2'th argument. */ |
d9c393f5 | 4391 | static inline void |
47c3f06d | 4392 | check_map_args (SCM argv, |
c014a02e | 4393 | long len, |
47c3f06d MD |
4394 | SCM gf, |
4395 | SCM proc, | |
4396 | SCM args, | |
4397 | const char *who) | |
d9c393f5 | 4398 | { |
34d19ef6 | 4399 | SCM const *ve = SCM_VELTS (argv); |
c014a02e | 4400 | long i; |
d9c393f5 | 4401 | |
b5c2579a | 4402 | for (i = SCM_VECTOR_LENGTH (argv) - 1; i >= 1; i--) |
d9c393f5 | 4403 | { |
c014a02e | 4404 | long elt_len = scm_ilength (ve[i]); |
d9c393f5 JB |
4405 | |
4406 | if (elt_len < 0) | |
47c3f06d MD |
4407 | { |
4408 | if (gf) | |
4409 | scm_apply_generic (gf, scm_cons (proc, args)); | |
4410 | else | |
4411 | scm_wrong_type_arg (who, i + 2, ve[i]); | |
4412 | } | |
d9c393f5 JB |
4413 | |
4414 | if (elt_len != len) | |
504d99c5 | 4415 | scm_out_of_range_pos (who, ve[i], SCM_MAKINUM (i + 2)); |
d9c393f5 JB |
4416 | } |
4417 | ||
5d2b97cd | 4418 | scm_remember_upto_here_1 (argv); |
d9c393f5 JB |
4419 | } |
4420 | ||
4421 | ||
47c3f06d | 4422 | SCM_GPROC (s_map, "map", 2, 0, 1, scm_map, g_map); |
1cc91f1b | 4423 | |
368bf056 MD |
4424 | /* Note: Currently, scm_map applies PROC to the argument list(s) |
4425 | sequentially, starting with the first element(s). This is used in | |
8878f040 | 4426 | evalext.c where the Scheme procedure `map-in-order', which guarantees |
368bf056 | 4427 | sequential behaviour, is implemented using scm_map. If the |
8878f040 | 4428 | behaviour changes, we need to update `map-in-order'. |
368bf056 MD |
4429 | */ |
4430 | ||
0f2d19dd | 4431 | SCM |
1bbd0b84 | 4432 | scm_map (SCM proc, SCM arg1, SCM args) |
af45e3b0 | 4433 | #define FUNC_NAME s_map |
0f2d19dd | 4434 | { |
c014a02e | 4435 | long i, len; |
0f2d19dd JB |
4436 | SCM res = SCM_EOL; |
4437 | SCM *pres = &res; | |
34d19ef6 | 4438 | SCM const *ve = &args; /* Keep args from being optimized away. */ |
0f2d19dd | 4439 | |
d9c393f5 | 4440 | len = scm_ilength (arg1); |
47c3f06d MD |
4441 | SCM_GASSERTn (len >= 0, |
4442 | g_map, scm_cons2 (proc, arg1, args), SCM_ARG2, s_map); | |
af45e3b0 | 4443 | SCM_VALIDATE_REST_ARGUMENT (args); |
0f2d19dd JB |
4444 | if (SCM_NULLP (args)) |
4445 | { | |
504d99c5 MD |
4446 | scm_t_trampoline_1 call = scm_trampoline_1 (proc); |
4447 | SCM_GASSERT2 (call, g_map, proc, arg1, SCM_ARG1, s_map); | |
4448 | while (SCM_NIMP (arg1)) | |
4449 | { | |
4450 | *pres = scm_list_1 (call (proc, SCM_CAR (arg1))); | |
4451 | pres = SCM_CDRLOC (*pres); | |
4452 | arg1 = SCM_CDR (arg1); | |
4453 | } | |
4454 | return res; | |
4455 | } | |
4456 | if (SCM_NULLP (SCM_CDR (args))) | |
4457 | { | |
4458 | SCM arg2 = SCM_CAR (args); | |
4459 | int len2 = scm_ilength (arg2); | |
4460 | scm_t_trampoline_2 call = scm_trampoline_2 (proc); | |
4461 | SCM_GASSERTn (call, | |
4462 | g_map, scm_cons2 (proc, arg1, args), SCM_ARG1, s_map); | |
4463 | SCM_GASSERTn (len2 >= 0, | |
4464 | g_map, scm_cons2 (proc, arg1, args), SCM_ARG3, s_map); | |
4465 | if (len2 != len) | |
4466 | SCM_OUT_OF_RANGE (3, arg2); | |
0f2d19dd JB |
4467 | while (SCM_NIMP (arg1)) |
4468 | { | |
504d99c5 | 4469 | *pres = scm_list_1 (call (proc, SCM_CAR (arg1), SCM_CAR (arg2))); |
a23afe53 | 4470 | pres = SCM_CDRLOC (*pres); |
0f2d19dd | 4471 | arg1 = SCM_CDR (arg1); |
504d99c5 | 4472 | arg2 = SCM_CDR (arg2); |
0f2d19dd JB |
4473 | } |
4474 | return res; | |
4475 | } | |
05b15362 DH |
4476 | arg1 = scm_cons (arg1, args); |
4477 | args = scm_vector (arg1); | |
0f2d19dd | 4478 | ve = SCM_VELTS (args); |
47c3f06d | 4479 | check_map_args (args, len, g_map, proc, arg1, s_map); |
0f2d19dd JB |
4480 | while (1) |
4481 | { | |
4482 | arg1 = SCM_EOL; | |
b5c2579a | 4483 | for (i = SCM_VECTOR_LENGTH (args) - 1; i >= 0; i--) |
0f2d19dd | 4484 | { |
d9c393f5 JB |
4485 | if (SCM_IMP (ve[i])) |
4486 | return res; | |
0f2d19dd | 4487 | arg1 = scm_cons (SCM_CAR (ve[i]), arg1); |
34d19ef6 | 4488 | SCM_VECTOR_SET (args, i, SCM_CDR (ve[i])); |
0f2d19dd | 4489 | } |
8ea46249 | 4490 | *pres = scm_list_1 (scm_apply (proc, arg1, SCM_EOL)); |
a23afe53 | 4491 | pres = SCM_CDRLOC (*pres); |
0f2d19dd JB |
4492 | } |
4493 | } | |
af45e3b0 | 4494 | #undef FUNC_NAME |
0f2d19dd JB |
4495 | |
4496 | ||
47c3f06d | 4497 | SCM_GPROC (s_for_each, "for-each", 2, 0, 1, scm_for_each, g_for_each); |
1cc91f1b | 4498 | |
0f2d19dd | 4499 | SCM |
1bbd0b84 | 4500 | scm_for_each (SCM proc, SCM arg1, SCM args) |
af45e3b0 | 4501 | #define FUNC_NAME s_for_each |
0f2d19dd | 4502 | { |
34d19ef6 | 4503 | SCM const *ve = &args; /* Keep args from being optimized away. */ |
c014a02e | 4504 | long i, len; |
d9c393f5 | 4505 | len = scm_ilength (arg1); |
47c3f06d MD |
4506 | SCM_GASSERTn (len >= 0, g_for_each, scm_cons2 (proc, arg1, args), |
4507 | SCM_ARG2, s_for_each); | |
af45e3b0 | 4508 | SCM_VALIDATE_REST_ARGUMENT (args); |
c96d76b8 | 4509 | if (SCM_NULLP (args)) |
0f2d19dd | 4510 | { |
504d99c5 MD |
4511 | scm_t_trampoline_1 call = scm_trampoline_1 (proc); |
4512 | SCM_GASSERT2 (call, g_for_each, proc, arg1, SCM_ARG1, s_for_each); | |
4513 | while (SCM_NIMP (arg1)) | |
4514 | { | |
4515 | call (proc, SCM_CAR (arg1)); | |
4516 | arg1 = SCM_CDR (arg1); | |
4517 | } | |
4518 | return SCM_UNSPECIFIED; | |
4519 | } | |
4520 | if (SCM_NULLP (SCM_CDR (args))) | |
4521 | { | |
4522 | SCM arg2 = SCM_CAR (args); | |
4523 | int len2 = scm_ilength (arg2); | |
4524 | scm_t_trampoline_2 call = scm_trampoline_2 (proc); | |
4525 | SCM_GASSERTn (call, g_for_each, | |
4526 | scm_cons2 (proc, arg1, args), SCM_ARG1, s_for_each); | |
4527 | SCM_GASSERTn (len2 >= 0, g_for_each, | |
4528 | scm_cons2 (proc, arg1, args), SCM_ARG3, s_for_each); | |
4529 | if (len2 != len) | |
4530 | SCM_OUT_OF_RANGE (3, arg2); | |
c96d76b8 | 4531 | while (SCM_NIMP (arg1)) |
0f2d19dd | 4532 | { |
504d99c5 | 4533 | call (proc, SCM_CAR (arg1), SCM_CAR (arg2)); |
0f2d19dd | 4534 | arg1 = SCM_CDR (arg1); |
504d99c5 | 4535 | arg2 = SCM_CDR (arg2); |
0f2d19dd JB |
4536 | } |
4537 | return SCM_UNSPECIFIED; | |
4538 | } | |
05b15362 DH |
4539 | arg1 = scm_cons (arg1, args); |
4540 | args = scm_vector (arg1); | |
0f2d19dd | 4541 | ve = SCM_VELTS (args); |
47c3f06d | 4542 | check_map_args (args, len, g_for_each, proc, arg1, s_for_each); |
0f2d19dd JB |
4543 | while (1) |
4544 | { | |
4545 | arg1 = SCM_EOL; | |
b5c2579a | 4546 | for (i = SCM_VECTOR_LENGTH (args) - 1; i >= 0; i--) |
0f2d19dd | 4547 | { |
c96d76b8 NJ |
4548 | if (SCM_IMP (ve[i])) |
4549 | return SCM_UNSPECIFIED; | |
0f2d19dd | 4550 | arg1 = scm_cons (SCM_CAR (ve[i]), arg1); |
34d19ef6 | 4551 | SCM_VECTOR_SET (args, i, SCM_CDR (ve[i])); |
0f2d19dd JB |
4552 | } |
4553 | scm_apply (proc, arg1, SCM_EOL); | |
4554 | } | |
4555 | } | |
af45e3b0 | 4556 | #undef FUNC_NAME |
0f2d19dd | 4557 | |
1cc91f1b | 4558 | |
0f2d19dd | 4559 | SCM |
6e8d25a6 | 4560 | scm_closure (SCM code, SCM env) |
0f2d19dd | 4561 | { |
16d4699b MV |
4562 | SCM z; |
4563 | SCM closcar = scm_cons (code, SCM_EOL); | |
228a24ef | 4564 | z = scm_cell (SCM_UNPACK (closcar) + scm_tc3_closure, (scm_t_bits) env); |
16d4699b | 4565 | scm_remember_upto_here (closcar); |
0f2d19dd JB |
4566 | return z; |
4567 | } | |
4568 | ||
4569 | ||
92c2555f | 4570 | scm_t_bits scm_tc16_promise; |
1cc91f1b | 4571 | |
0f2d19dd | 4572 | SCM |
6e8d25a6 | 4573 | scm_makprom (SCM code) |
0f2d19dd | 4574 | { |
28d52ebb MD |
4575 | SCM_RETURN_NEWSMOB2 (scm_tc16_promise, |
4576 | SCM_UNPACK (code), | |
4577 | scm_make_rec_mutex ()); | |
0f2d19dd JB |
4578 | } |
4579 | ||
28d52ebb MD |
4580 | static size_t |
4581 | promise_free (SCM promise) | |
4582 | { | |
4583 | scm_rec_mutex_free (SCM_PROMISE_MUTEX (promise)); | |
4584 | return 0; | |
4585 | } | |
1cc91f1b | 4586 | |
0f2d19dd | 4587 | static int |
e841c3e0 | 4588 | promise_print (SCM exp, SCM port, scm_print_state *pstate) |
0f2d19dd | 4589 | { |
19402679 | 4590 | int writingp = SCM_WRITINGP (pstate); |
b7f3516f | 4591 | scm_puts ("#<promise ", port); |
19402679 | 4592 | SCM_SET_WRITINGP (pstate, 1); |
28d52ebb | 4593 | scm_iprin1 (SCM_PROMISE_DATA (exp), port, pstate); |
19402679 | 4594 | SCM_SET_WRITINGP (pstate, writingp); |
b7f3516f | 4595 | scm_putc ('>', port); |
0f2d19dd JB |
4596 | return !0; |
4597 | } | |
4598 | ||
3b3b36dd | 4599 | SCM_DEFINE (scm_force, "force", 1, 0, 0, |
28d52ebb | 4600 | (SCM promise), |
67e8151b MG |
4601 | "If the promise @var{x} has not been computed yet, compute and\n" |
4602 | "return @var{x}, otherwise just return the previously computed\n" | |
4603 | "value.") | |
1bbd0b84 | 4604 | #define FUNC_NAME s_scm_force |
0f2d19dd | 4605 | { |
28d52ebb MD |
4606 | SCM_VALIDATE_SMOB (1, promise, promise); |
4607 | scm_rec_mutex_lock (SCM_PROMISE_MUTEX (promise)); | |
4608 | if (!SCM_PROMISE_COMPUTED_P (promise)) | |
0f2d19dd | 4609 | { |
28d52ebb MD |
4610 | SCM ans = scm_call_0 (SCM_PROMISE_DATA (promise)); |
4611 | if (!SCM_PROMISE_COMPUTED_P (promise)) | |
0f2d19dd | 4612 | { |
28d52ebb MD |
4613 | SCM_SET_PROMISE_DATA (promise, ans); |
4614 | SCM_SET_PROMISE_COMPUTED (promise); | |
0f2d19dd JB |
4615 | } |
4616 | } | |
28d52ebb MD |
4617 | scm_rec_mutex_unlock (SCM_PROMISE_MUTEX (promise)); |
4618 | return SCM_PROMISE_DATA (promise); | |
0f2d19dd | 4619 | } |
1bbd0b84 | 4620 | #undef FUNC_NAME |
0f2d19dd | 4621 | |
445f675c | 4622 | |
a1ec6916 | 4623 | SCM_DEFINE (scm_promise_p, "promise?", 1, 0, 0, |
67e8151b | 4624 | (SCM obj), |
b380b885 | 4625 | "Return true if @var{obj} is a promise, i.e. a delayed computation\n" |
7a095584 | 4626 | "(@pxref{Delayed evaluation,,,r5rs.info,The Revised^5 Report on Scheme}).") |
1bbd0b84 | 4627 | #define FUNC_NAME s_scm_promise_p |
0f2d19dd | 4628 | { |
67e8151b | 4629 | return SCM_BOOL (SCM_TYP16_PREDICATE (scm_tc16_promise, obj)); |
0f2d19dd | 4630 | } |
1bbd0b84 | 4631 | #undef FUNC_NAME |
0f2d19dd | 4632 | |
445f675c | 4633 | |
a1ec6916 | 4634 | SCM_DEFINE (scm_cons_source, "cons-source", 3, 0, 0, |
1bbd0b84 | 4635 | (SCM xorig, SCM x, SCM y), |
11768c04 NJ |
4636 | "Create and return a new pair whose car and cdr are @var{x} and @var{y}.\n" |
4637 | "Any source properties associated with @var{xorig} are also associated\n" | |
4638 | "with the new pair.") | |
1bbd0b84 | 4639 | #define FUNC_NAME s_scm_cons_source |
26d5b9b4 MD |
4640 | { |
4641 | SCM p, z; | |
16d4699b | 4642 | z = scm_cons (x, y); |
26d5b9b4 MD |
4643 | /* Copy source properties possibly associated with xorig. */ |
4644 | p = scm_whash_lookup (scm_source_whash, xorig); | |
445f675c | 4645 | if (!SCM_IMP (p)) |
26d5b9b4 MD |
4646 | scm_whash_insert (scm_source_whash, z, p); |
4647 | return z; | |
4648 | } | |
1bbd0b84 | 4649 | #undef FUNC_NAME |
26d5b9b4 | 4650 | |
445f675c | 4651 | |
a1ec6916 | 4652 | SCM_DEFINE (scm_copy_tree, "copy-tree", 1, 0, 0, |
1bbd0b84 | 4653 | (SCM obj), |
b380b885 MD |
4654 | "Recursively copy the data tree that is bound to @var{obj}, and return a\n" |
4655 | "pointer to the new data structure. @code{copy-tree} recurses down the\n" | |
4656 | "contents of both pairs and vectors (since both cons cells and vector\n" | |
4657 | "cells may point to arbitrary objects), and stops recursing when it hits\n" | |
4658 | "any other object.") | |
1bbd0b84 | 4659 | #define FUNC_NAME s_scm_copy_tree |
0f2d19dd JB |
4660 | { |
4661 | SCM ans, tl; | |
26d5b9b4 | 4662 | if (SCM_IMP (obj)) |
ff467021 | 4663 | return obj; |
3910272e MD |
4664 | if (SCM_VECTORP (obj)) |
4665 | { | |
c014a02e | 4666 | unsigned long i = SCM_VECTOR_LENGTH (obj); |
00ffa0e7 | 4667 | ans = scm_c_make_vector (i, SCM_UNSPECIFIED); |
3910272e | 4668 | while (i--) |
34d19ef6 | 4669 | SCM_VECTOR_SET (ans, i, scm_copy_tree (SCM_VELTS (obj)[i])); |
3910272e MD |
4670 | return ans; |
4671 | } | |
01f11e02 | 4672 | if (!SCM_CONSP (obj)) |
0f2d19dd | 4673 | return obj; |
26d5b9b4 MD |
4674 | ans = tl = scm_cons_source (obj, |
4675 | scm_copy_tree (SCM_CAR (obj)), | |
4676 | SCM_UNSPECIFIED); | |
05b15362 | 4677 | for (obj = SCM_CDR (obj); SCM_CONSP (obj); obj = SCM_CDR (obj)) |
a23afe53 MD |
4678 | { |
4679 | SCM_SETCDR (tl, scm_cons (scm_copy_tree (SCM_CAR (obj)), | |
4680 | SCM_UNSPECIFIED)); | |
4681 | tl = SCM_CDR (tl); | |
4682 | } | |
4683 | SCM_SETCDR (tl, obj); | |
0f2d19dd JB |
4684 | return ans; |
4685 | } | |
1bbd0b84 | 4686 | #undef FUNC_NAME |
0f2d19dd | 4687 | |
1cc91f1b | 4688 | |
4163eb72 MV |
4689 | /* We have three levels of EVAL here: |
4690 | ||
4691 | - scm_i_eval (exp, env) | |
4692 | ||
4693 | evaluates EXP in environment ENV. ENV is a lexical environment | |
4694 | structure as used by the actual tree code evaluator. When ENV is | |
4695 | a top-level environment, then changes to the current module are | |
a513ead3 | 4696 | tracked by updating ENV so that it continues to be in sync with |
4163eb72 MV |
4697 | the current module. |
4698 | ||
4699 | - scm_primitive_eval (exp) | |
4700 | ||
4701 | evaluates EXP in the top-level environment as determined by the | |
4702 | current module. This is done by constructing a suitable | |
4703 | environment and calling scm_i_eval. Thus, changes to the | |
4704 | top-level module are tracked normally. | |
4705 | ||
4706 | - scm_eval (exp, mod) | |
4707 | ||
a513ead3 | 4708 | evaluates EXP while MOD is the current module. This is done by |
4163eb72 MV |
4709 | setting the current module to MOD, invoking scm_primitive_eval on |
4710 | EXP, and then restoring the current module to the value it had | |
4711 | previously. That is, while EXP is evaluated, changes to the | |
4712 | current module are tracked, but these changes do not persist when | |
4713 | scm_eval returns. | |
4714 | ||
4715 | For each level of evals, there are two variants, distinguished by a | |
4716 | _x suffix: the ordinary variant does not modify EXP while the _x | |
4717 | variant can destructively modify EXP into something completely | |
4718 | unintelligible. A Scheme data structure passed as EXP to one of the | |
4719 | _x variants should not ever be used again for anything. So when in | |
4720 | doubt, use the ordinary variant. | |
4721 | ||
4722 | */ | |
4723 | ||
0f2d19dd | 4724 | SCM |
68d8be66 | 4725 | scm_i_eval_x (SCM exp, SCM env) |
0f2d19dd | 4726 | { |
68d8be66 | 4727 | return SCM_XEVAL (exp, env); |
0f2d19dd JB |
4728 | } |
4729 | ||
68d8be66 MD |
4730 | SCM |
4731 | scm_i_eval (SCM exp, SCM env) | |
4732 | { | |
26fb6390 | 4733 | exp = scm_copy_tree (exp); |
e37a4fba | 4734 | return SCM_XEVAL (exp, env); |
68d8be66 MD |
4735 | } |
4736 | ||
4737 | SCM | |
4163eb72 | 4738 | scm_primitive_eval_x (SCM exp) |
0f2d19dd | 4739 | { |
a513ead3 | 4740 | SCM env; |
bcdab802 | 4741 | SCM transformer = scm_current_module_transformer (); |
a513ead3 | 4742 | if (SCM_NIMP (transformer)) |
fdc28395 | 4743 | exp = scm_call_1 (transformer, exp); |
a513ead3 | 4744 | env = scm_top_level_env (scm_current_module_lookup_closure ()); |
4163eb72 | 4745 | return scm_i_eval_x (exp, env); |
0f2d19dd JB |
4746 | } |
4747 | ||
4163eb72 MV |
4748 | SCM_DEFINE (scm_primitive_eval, "primitive-eval", 1, 0, 0, |
4749 | (SCM exp), | |
2069af38 | 4750 | "Evaluate @var{exp} in the top-level environment specified by\n" |
4163eb72 MV |
4751 | "the current module.") |
4752 | #define FUNC_NAME s_scm_primitive_eval | |
4753 | { | |
a513ead3 | 4754 | SCM env; |
bcdab802 | 4755 | SCM transformer = scm_current_module_transformer (); |
a513ead3 | 4756 | if (SCM_NIMP (transformer)) |
fdc28395 | 4757 | exp = scm_call_1 (transformer, exp); |
a513ead3 | 4758 | env = scm_top_level_env (scm_current_module_lookup_closure ()); |
4163eb72 MV |
4759 | return scm_i_eval (exp, env); |
4760 | } | |
4761 | #undef FUNC_NAME | |
4762 | ||
68d8be66 MD |
4763 | /* Eval does not take the second arg optionally. This is intentional |
4764 | * in order to be R5RS compatible, and to prepare for the new module | |
4765 | * system, where we would like to make the choice of evaluation | |
4163eb72 | 4766 | * environment explicit. */ |
549e6ec6 | 4767 | |
09074dbf DH |
4768 | static void |
4769 | change_environment (void *data) | |
4770 | { | |
4771 | SCM pair = SCM_PACK (data); | |
4772 | SCM new_module = SCM_CAR (pair); | |
aa767bc5 | 4773 | SCM old_module = scm_current_module (); |
09074dbf | 4774 | SCM_SETCDR (pair, old_module); |
aa767bc5 | 4775 | scm_set_current_module (new_module); |
09074dbf DH |
4776 | } |
4777 | ||
4778 | ||
09074dbf DH |
4779 | static void |
4780 | restore_environment (void *data) | |
4781 | { | |
4782 | SCM pair = SCM_PACK (data); | |
4783 | SCM old_module = SCM_CDR (pair); | |
aa767bc5 | 4784 | SCM new_module = scm_current_module (); |
2e9c835d | 4785 | SCM_SETCAR (pair, new_module); |
aa767bc5 | 4786 | scm_set_current_module (old_module); |
09074dbf DH |
4787 | } |
4788 | ||
4163eb72 MV |
4789 | static SCM |
4790 | inner_eval_x (void *data) | |
4791 | { | |
4792 | return scm_primitive_eval_x (SCM_PACK(data)); | |
4793 | } | |
4794 | ||
4795 | SCM | |
4796 | scm_eval_x (SCM exp, SCM module) | |
4797 | #define FUNC_NAME "eval!" | |
4798 | { | |
4799 | SCM_VALIDATE_MODULE (2, module); | |
4800 | ||
4801 | return scm_internal_dynamic_wind | |
4802 | (change_environment, inner_eval_x, restore_environment, | |
4803 | (void *) SCM_UNPACK (exp), | |
4804 | (void *) SCM_UNPACK (scm_cons (module, SCM_BOOL_F))); | |
4805 | } | |
4806 | #undef FUNC_NAME | |
4807 | ||
4808 | static SCM | |
4809 | inner_eval (void *data) | |
4810 | { | |
4811 | return scm_primitive_eval (SCM_PACK(data)); | |
4812 | } | |
09074dbf | 4813 | |
68d8be66 | 4814 | SCM_DEFINE (scm_eval, "eval", 2, 0, 0, |
4163eb72 MV |
4815 | (SCM exp, SCM module), |
4816 | "Evaluate @var{exp}, a list representing a Scheme expression,\n" | |
4817 | "in the top-level environment specified by @var{module}.\n" | |
8f85c0c6 | 4818 | "While @var{exp} is evaluated (using @code{primitive-eval}),\n" |
4163eb72 MV |
4819 | "@var{module} is made the current module. The current module\n" |
4820 | "is reset to its previous value when @var{eval} returns.") | |
1bbd0b84 | 4821 | #define FUNC_NAME s_scm_eval |
0f2d19dd | 4822 | { |
4163eb72 | 4823 | SCM_VALIDATE_MODULE (2, module); |
09074dbf DH |
4824 | |
4825 | return scm_internal_dynamic_wind | |
4826 | (change_environment, inner_eval, restore_environment, | |
4163eb72 MV |
4827 | (void *) SCM_UNPACK (exp), |
4828 | (void *) SCM_UNPACK (scm_cons (module, SCM_BOOL_F))); | |
0f2d19dd | 4829 | } |
1bbd0b84 | 4830 | #undef FUNC_NAME |
0f2d19dd | 4831 | |
6dbd0af5 MD |
4832 | |
4833 | /* At this point, scm_deval and scm_dapply are generated. | |
4834 | */ | |
4835 | ||
a44a9715 DH |
4836 | #define DEVAL |
4837 | #include "eval.c" | |
0f2d19dd | 4838 | |
1cc91f1b | 4839 | |
0f2d19dd JB |
4840 | void |
4841 | scm_init_eval () | |
0f2d19dd | 4842 | { |
33b97402 MD |
4843 | scm_init_opts (scm_evaluator_traps, |
4844 | scm_evaluator_trap_table, | |
4845 | SCM_N_EVALUATOR_TRAPS); | |
4846 | scm_init_opts (scm_eval_options_interface, | |
4847 | scm_eval_opts, | |
4848 | SCM_N_EVAL_OPTIONS); | |
4849 | ||
f99c9c28 MD |
4850 | scm_tc16_promise = scm_make_smob_type ("promise", 0); |
4851 | scm_set_smob_mark (scm_tc16_promise, scm_markcdr); | |
28d52ebb | 4852 | scm_set_smob_free (scm_tc16_promise, promise_free); |
e841c3e0 | 4853 | scm_set_smob_print (scm_tc16_promise, promise_print); |
b8229a3b | 4854 | |
a44a9715 DH |
4855 | undefineds = scm_list_1 (SCM_UNDEFINED); |
4856 | SCM_SETCDR (undefineds, undefineds); | |
4857 | scm_permanent_object (undefineds); | |
7c33806a | 4858 | |
a44a9715 | 4859 | scm_listofnull = scm_list_1 (SCM_EOL); |
0f2d19dd | 4860 | |
a44a9715 DH |
4861 | f_apply = scm_c_define_subr ("apply", scm_tc7_lsubr_2, scm_apply); |
4862 | scm_permanent_object (f_apply); | |
86d31dfe | 4863 | |
a0599745 | 4864 | #include "libguile/eval.x" |
86d31dfe | 4865 | |
25eaf21a | 4866 | scm_add_feature ("delay"); |
0f2d19dd | 4867 | } |
0f2d19dd | 4868 | |
6dbd0af5 | 4869 | #endif /* !DEVAL */ |
89e00824 ML |
4870 | |
4871 | /* | |
4872 | Local Variables: | |
4873 | c-file-style: "gnu" | |
4874 | End: | |
4875 | */ |