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 | ||
cc56ba80 | 103 | /* If a form is detected that holds less expressions than are required in that |
8ae95199 | 104 | * context, a 'Missing expression' error is signalled. */ |
cc56ba80 DH |
105 | static const char s_missing_expression[] = "Missing expression in"; |
106 | ||
609a8b86 | 107 | /* If a form is detected that holds more expressions than are allowed in that |
8ae95199 | 108 | * context, an 'Extra expression' error is signalled. */ |
609a8b86 DH |
109 | static const char s_extra_expression[] = "Extra expression in"; |
110 | ||
2a6f7afe DH |
111 | /* Case or cond expressions must have at least one clause. If a case or cond |
112 | * expression without any clauses is detected, a 'Missing clauses' error is | |
113 | * signalled. */ | |
114 | static const char s_missing_clauses[] = "Missing clauses"; | |
115 | ||
609a8b86 DH |
116 | /* If there is an 'else' clause in a case or a cond statement, it must be the |
117 | * last clause. If after the 'else' case clause further clauses are detected, | |
118 | * a 'Misplaced else clause' error is signalled. */ | |
119 | static const char s_misplaced_else_clause[] = "Misplaced else clause"; | |
120 | ||
2a6f7afe DH |
121 | /* If a case clause is detected that is not in the format |
122 | * (<label(s)> <expression1> <expression2> ...) | |
123 | * a 'Bad case clause' error is signalled. */ | |
124 | static const char s_bad_case_clause[] = "Bad case clause"; | |
125 | ||
2a6f7afe DH |
126 | /* If a case clause is detected where the <label(s)> element is neither a |
127 | * proper list nor (in case of the last clause) the syntactic keyword 'else', | |
128 | * a 'Bad case labels' error is signalled. Note: If you encounter this error | |
129 | * for an else-clause which seems to be syntactically correct, check if 'else' | |
130 | * is really a syntactic keyword in that context. If 'else' is bound in the | |
131 | * local or global environment, it is not considered a syntactic keyword, but | |
132 | * will be treated as any other variable. */ | |
133 | static const char s_bad_case_labels[] = "Bad case labels"; | |
134 | ||
135 | /* In a case statement all labels have to be distinct. If in a case statement | |
136 | * a label occurs more than once, a 'Duplicate case label' error is | |
137 | * signalled. */ | |
138 | static const char s_duplicate_case_label[] = "Duplicate case label"; | |
139 | ||
609a8b86 DH |
140 | /* If a cond clause is detected that is not in one of the formats |
141 | * (<test> <expression1> ...) or (else <expression1> <expression2> ...) | |
142 | * a 'Bad cond clause' error is signalled. */ | |
143 | static const char s_bad_cond_clause[] = "Bad cond clause"; | |
144 | ||
145 | /* If a cond clause is detected that uses the alternate '=>' form, but does | |
146 | * not hold a recipient element for the test result, a 'Missing recipient' | |
147 | * error is signalled. */ | |
148 | static const char s_missing_recipient[] = "Missing recipient in"; | |
149 | ||
cc56ba80 DH |
150 | /* If in a position where a variable name is required some other object is |
151 | * detected, a 'Bad variable' error is signalled. */ | |
152 | static const char s_bad_variable[] = "Bad variable"; | |
153 | ||
e6729603 DH |
154 | |
155 | /* Signal a syntax error. We distinguish between the form that caused the | |
156 | * error and the enclosing expression. The error message will print out as | |
157 | * shown in the following pattern. The file name and line number are only | |
158 | * given when they can be determined from the erroneous form or from the | |
159 | * enclosing expression. | |
160 | * | |
161 | * <filename>: In procedure memoization: | |
162 | * <filename>: In file <name>, line <nr>: <error-message> in <expression>. */ | |
163 | ||
164 | SCM_SYMBOL (syntax_error_key, "syntax-error"); | |
165 | ||
166 | /* The prototype is needed to indicate that the function does not return. */ | |
167 | static void | |
168 | syntax_error (const char* const, const SCM, const SCM) SCM_NORETURN; | |
169 | ||
170 | static void | |
171 | syntax_error (const char* const msg, const SCM form, const SCM expr) | |
172 | { | |
173 | const SCM msg_string = scm_makfrom0str (msg); | |
174 | SCM filename = SCM_BOOL_F; | |
175 | SCM linenr = SCM_BOOL_F; | |
176 | const char *format; | |
177 | SCM args; | |
178 | ||
179 | if (SCM_CONSP (form)) | |
180 | { | |
181 | filename = scm_source_property (form, scm_sym_filename); | |
182 | linenr = scm_source_property (form, scm_sym_line); | |
183 | } | |
184 | ||
185 | if (SCM_FALSEP (filename) && SCM_FALSEP (linenr) && SCM_CONSP (expr)) | |
186 | { | |
187 | filename = scm_source_property (expr, scm_sym_filename); | |
188 | linenr = scm_source_property (expr, scm_sym_line); | |
189 | } | |
190 | ||
191 | if (!SCM_UNBNDP (expr)) | |
192 | { | |
193 | if (!SCM_FALSEP (filename)) | |
194 | { | |
195 | format = "In file ~S, line ~S: ~A ~S in expression ~S."; | |
196 | args = scm_list_5 (filename, linenr, msg_string, form, expr); | |
197 | } | |
198 | else if (!SCM_FALSEP (linenr)) | |
199 | { | |
200 | format = "In line ~S: ~A ~S in expression ~S."; | |
201 | args = scm_list_4 (linenr, msg_string, form, expr); | |
202 | } | |
203 | else | |
204 | { | |
205 | format = "~A ~S in expression ~S."; | |
206 | args = scm_list_3 (msg_string, form, expr); | |
207 | } | |
208 | } | |
209 | else | |
210 | { | |
211 | if (!SCM_FALSEP (filename)) | |
212 | { | |
213 | format = "In file ~S, line ~S: ~A ~S."; | |
214 | args = scm_list_4 (filename, linenr, msg_string, form); | |
215 | } | |
216 | else if (!SCM_FALSEP (linenr)) | |
217 | { | |
218 | format = "In line ~S: ~A ~S."; | |
219 | args = scm_list_3 (linenr, msg_string, form); | |
220 | } | |
221 | else | |
222 | { | |
223 | format = "~A ~S."; | |
224 | args = scm_list_2 (msg_string, form); | |
225 | } | |
226 | } | |
227 | ||
228 | scm_error (syntax_error_key, "memoization", format, args, SCM_BOOL_F); | |
229 | } | |
230 | ||
231 | ||
232 | /* Shortcut macros to simplify syntax error handling. */ | |
233 | #define ASSERT_SYNTAX(cond, message, form) \ | |
234 | { if (!(cond)) syntax_error (message, form, SCM_UNDEFINED); } | |
235 | #define ASSERT_SYNTAX_2(cond, message, form, expr) \ | |
236 | { if (!(cond)) syntax_error (message, form, expr); } | |
237 | ||
238 | \f | |
239 | ||
d0624e39 DH |
240 | /* {Ilocs} |
241 | * | |
242 | * Ilocs are memoized references to variables in local environment frames. | |
243 | * They are represented as three values: The relative offset of the | |
244 | * environment frame, the number of the binding within that frame, and a | |
245 | * boolean value indicating whether the binding is the last binding in the | |
246 | * frame. | |
247 | */ | |
248 | #define SCM_ILOC00 SCM_MAKE_ITAG8(0L, scm_tc8_iloc) | |
249 | #define SCM_IDINC (0x00100000L) | |
250 | #define SCM_IDSTMSK (-SCM_IDINC) | |
251 | #define SCM_MAKE_ILOC(frame_nr, binding_nr, last_p) \ | |
252 | SCM_PACK ( \ | |
253 | ((frame_nr) << 8) \ | |
254 | + ((binding_nr) << 20) \ | |
255 | + ((last_p) ? SCM_ICDR : 0) \ | |
256 | + scm_tc8_iloc ) | |
257 | ||
258 | #if (SCM_DEBUG_DEBUGGING_SUPPORT == 1) | |
259 | ||
260 | SCM scm_dbg_make_iloc (SCM frame, SCM binding, SCM cdrp); | |
261 | SCM_DEFINE (scm_dbg_make_iloc, "dbg-make-iloc", 3, 0, 0, | |
262 | (SCM frame, SCM binding, SCM cdrp), | |
263 | "Return a new iloc with frame offset @var{frame}, binding\n" | |
264 | "offset @var{binding} and the cdr flag @var{cdrp}.") | |
265 | #define FUNC_NAME s_scm_dbg_make_iloc | |
266 | { | |
267 | SCM_VALIDATE_INUM (1, frame); | |
268 | SCM_VALIDATE_INUM (2, binding); | |
269 | return SCM_MAKE_ILOC (SCM_INUM (frame), | |
270 | SCM_INUM (binding), | |
271 | !SCM_FALSEP (cdrp)); | |
272 | } | |
273 | #undef FUNC_NAME | |
274 | ||
275 | SCM scm_dbg_iloc_p (SCM obj); | |
276 | SCM_DEFINE (scm_dbg_iloc_p, "dbg-iloc?", 1, 0, 0, | |
277 | (SCM obj), | |
278 | "Return @code{#t} if @var{obj} is an iloc.") | |
279 | #define FUNC_NAME s_scm_dbg_iloc_p | |
280 | { | |
281 | return SCM_BOOL (SCM_ILOCP (obj)); | |
282 | } | |
283 | #undef FUNC_NAME | |
284 | ||
285 | #endif | |
286 | ||
287 | \f | |
288 | ||
17fa3fcf DH |
289 | #define SCM_VALIDATE_NON_EMPTY_COMBINATION(x) \ |
290 | do { \ | |
291 | if (SCM_EQ_P ((x), SCM_EOL)) \ | |
e90c3a89 | 292 | scm_misc_error (NULL, s_expression, SCM_EOL); \ |
17fa3fcf DH |
293 | } while (0) |
294 | ||
295 | \f | |
296 | ||
6dbd0af5 MD |
297 | /* The evaluator contains a plethora of EVAL symbols. |
298 | * This is an attempt at explanation. | |
299 | * | |
300 | * The following macros should be used in code which is read twice | |
301 | * (where the choice of evaluator is hard soldered): | |
302 | * | |
303 | * SCM_CEVAL is the symbol used within one evaluator to call itself. | |
304 | * Originally, it is defined to scm_ceval, but is redefined to | |
305 | * scm_deval during the second pass. | |
306 | * | |
6cb702da | 307 | * SCM_EVALIM is used when it is known that the expression is an |
6dbd0af5 MD |
308 | * immediate. (This macro never calls an evaluator.) |
309 | * | |
310 | * EVALCAR evaluates the car of an expression. | |
311 | * | |
6dbd0af5 MD |
312 | * The following macros should be used in code which is read once |
313 | * (where the choice of evaluator is dynamic): | |
314 | * | |
6cb702da | 315 | * SCM_XEVAL takes care of immediates without calling an evaluator. It |
6dbd0af5 MD |
316 | * then calls scm_ceval *or* scm_deval, depending on the debugging |
317 | * mode. | |
318 | * | |
6cb702da | 319 | * SCM_XEVALCAR corresponds to EVALCAR, but uses scm_ceval *or* scm_deval |
6dbd0af5 MD |
320 | * depending on the debugging mode. |
321 | * | |
322 | * The main motivation for keeping this plethora is efficiency | |
323 | * together with maintainability (=> locality of code). | |
324 | */ | |
325 | ||
6cb702da | 326 | #define SCM_CEVAL scm_ceval |
0f2d19dd | 327 | |
e90c3a89 DH |
328 | #define SCM_EVALIM2(x) \ |
329 | ((SCM_EQ_P ((x), SCM_EOL) \ | |
330 | ? scm_misc_error (NULL, s_expression, SCM_EOL), 0 \ | |
331 | : 0), \ | |
332 | (x)) | |
333 | ||
334 | #define SCM_EVALIM(x, env) (SCM_ILOCP (x) \ | |
335 | ? *scm_ilookup ((x), env) \ | |
336 | : SCM_EVALIM2(x)) | |
337 | ||
338 | #define SCM_XEVAL(x, env) (SCM_IMP (x) \ | |
339 | ? SCM_EVALIM2(x) \ | |
340 | : (*scm_ceval_ptr) ((x), (env))) | |
341 | ||
342 | #define SCM_XEVALCAR(x, env) (SCM_IMP (SCM_CAR (x)) \ | |
343 | ? SCM_EVALIM (SCM_CAR (x), env) \ | |
344 | : (SCM_SYMBOLP (SCM_CAR (x)) \ | |
345 | ? *scm_lookupcar (x, env, 1) \ | |
346 | : (*scm_ceval_ptr) (SCM_CAR (x), env))) | |
347 | ||
8c494e99 | 348 | #define EVALCAR(x, env) (SCM_IMP (SCM_CAR (x)) \ |
904a077d | 349 | ? SCM_EVALIM (SCM_CAR (x), env) \ |
680516ba DH |
350 | : (SCM_SYMBOLP (SCM_CAR (x)) \ |
351 | ? *scm_lookupcar (x, env, 1) \ | |
352 | : SCM_CEVAL (SCM_CAR (x), env))) | |
0f2d19dd | 353 | |
28d52ebb | 354 | SCM_REC_MUTEX (source_mutex); |
9bc4701c | 355 | |
12841895 | 356 | |
e90c3a89 DH |
357 | static const char s_expression[] = "missing or extra expression"; |
358 | static const char s_test[] = "bad test"; | |
359 | static const char s_body[] = "bad body"; | |
360 | static const char s_bindings[] = "bad bindings"; | |
361 | static const char s_duplicate_bindings[] = "duplicate bindings"; | |
362 | static const char s_variable[] = "bad variable"; | |
363 | static const char s_clauses[] = "bad or missing clauses"; | |
364 | static const char s_formals[] = "bad formals"; | |
365 | static const char s_duplicate_formals[] = "duplicate formals"; | |
366 | static const char s_splicing[] = "bad (non-list) result for unquote-splicing"; | |
367 | ||
368 | ||
12841895 DH |
369 | /* Lookup a given local variable in an environment. The local variable is |
370 | * given as an iloc, that is a triple <frame, binding, last?>, where frame | |
371 | * indicates the relative number of the environment frame (counting upwards | |
372 | * from the innermost environment frame), binding indicates the number of the | |
373 | * binding within the frame, and last? (which is extracted from the iloc using | |
374 | * the macro SCM_ICDRP) indicates whether the binding forms the binding at the | |
375 | * very end of the improper list of bindings. */ | |
0f2d19dd | 376 | SCM * |
6e8d25a6 | 377 | scm_ilookup (SCM iloc, SCM env) |
0f2d19dd | 378 | { |
12841895 DH |
379 | unsigned int frame_nr = SCM_IFRAME (iloc); |
380 | unsigned int binding_nr = SCM_IDIST (iloc); | |
381 | SCM frames = env; | |
382 | SCM bindings; | |
383 | ||
384 | for (; 0 != frame_nr; --frame_nr) | |
385 | frames = SCM_CDR (frames); | |
386 | ||
387 | bindings = SCM_CAR (frames); | |
388 | for (; 0 != binding_nr; --binding_nr) | |
389 | bindings = SCM_CDR (bindings); | |
390 | ||
0f2d19dd | 391 | if (SCM_ICDRP (iloc)) |
12841895 DH |
392 | return SCM_CDRLOC (bindings); |
393 | return SCM_CARLOC (SCM_CDR (bindings)); | |
0f2d19dd | 394 | } |
0f2d19dd | 395 | |
12841895 | 396 | |
f8769b1d MV |
397 | /* The Lookup Car Race |
398 | - by Eva Luator | |
399 | ||
400 | Memoization of variables and special forms is done while executing | |
401 | the code for the first time. As long as there is only one thread | |
402 | everything is fine, but as soon as two threads execute the same | |
403 | code concurrently `for the first time' they can come into conflict. | |
404 | ||
405 | This memoization includes rewriting variable references into more | |
406 | efficient forms and expanding macros. Furthermore, macro expansion | |
407 | includes `compiling' special forms like `let', `cond', etc. into | |
408 | tree-code instructions. | |
409 | ||
410 | There shouldn't normally be a problem with memoizing local and | |
904a077d | 411 | global variable references (into ilocs and variables), because all |
f8769b1d MV |
412 | threads will mutate the code in *exactly* the same way and (if I |
413 | read the C code correctly) it is not possible to observe a half-way | |
414 | mutated cons cell. The lookup procedure can handle this | |
415 | transparently without any critical sections. | |
416 | ||
417 | It is different with macro expansion, because macro expansion | |
418 | happens outside of the lookup procedure and can't be | |
904a077d MV |
419 | undone. Therefore the lookup procedure can't cope with it. It has |
420 | to indicate failure when it detects a lost race and hope that the | |
421 | caller can handle it. Luckily, it turns out that this is the case. | |
f8769b1d | 422 | |
904a077d | 423 | An example to illustrate this: Suppose that the following form will |
f8769b1d MV |
424 | be memoized concurrently by two threads |
425 | ||
426 | (let ((x 12)) x) | |
427 | ||
428 | Let's first examine the lookup of X in the body. The first thread | |
429 | decides that it has to find the symbol "x" in the environment and | |
430 | starts to scan it. Then the other thread takes over and actually | |
431 | overtakes the first. It looks up "x" and substitutes an | |
432 | appropriate iloc for it. Now the first thread continues and | |
433 | completes its lookup. It comes to exactly the same conclusions as | |
434 | the second one and could - without much ado - just overwrite the | |
435 | iloc with the same iloc. | |
436 | ||
437 | But let's see what will happen when the race occurs while looking | |
438 | up the symbol "let" at the start of the form. It could happen that | |
439 | the second thread interrupts the lookup of the first thread and not | |
904a077d MV |
440 | only substitutes a variable for it but goes right ahead and |
441 | replaces it with the compiled form (#@let* (x 12) x). Now, when | |
442 | the first thread completes its lookup, it would replace the #@let* | |
443 | with a variable containing the "let" binding, effectively reverting | |
444 | the form to (let (x 12) x). This is wrong. It has to detect that | |
445 | it has lost the race and the evaluator has to reconsider the | |
446 | changed form completely. | |
f8769b1d MV |
447 | |
448 | This race condition could be resolved with some kind of traffic | |
449 | light (like mutexes) around scm_lookupcar, but I think that it is | |
450 | best to avoid them in this case. They would serialize memoization | |
451 | completely and because lookup involves calling arbitrary Scheme | |
452 | code (via the lookup-thunk), threads could be blocked for an | |
453 | arbitrary amount of time or even deadlock. But with the current | |
454 | solution a lot of unnecessary work is potentially done. */ | |
455 | ||
9aa82b39 | 456 | /* SCM_LOOKUPCAR1 is what SCM_LOOKUPCAR used to be but is allowed to |
f8769b1d MV |
457 | return NULL to indicate a failed lookup due to some race conditions |
458 | between threads. This only happens when VLOC is the first cell of | |
459 | a special form that will eventually be memoized (like `let', etc.) | |
460 | In that case the whole lookup is bogus and the caller has to | |
461 | reconsider the complete special form. | |
462 | ||
463 | SCM_LOOKUPCAR is still there, of course. It just calls | |
de513fa0 | 464 | SCM_LOOKUPCAR1 and aborts on receiving NULL. So SCM_LOOKUPCAR |
f8769b1d MV |
465 | should only be called when it is known that VLOC is not the first |
466 | pair of a special form. Otherwise, use SCM_LOOKUPCAR1 and check | |
26d5b9b4 MD |
467 | for NULL. I think I've found the only places where this |
468 | applies. */ | |
f8769b1d | 469 | |
f25f761d GH |
470 | SCM_SYMBOL (scm_unbound_variable_key, "unbound-variable"); |
471 | ||
8ecf1f13 | 472 | static SCM * |
26d5b9b4 | 473 | scm_lookupcar1 (SCM vloc, SCM genv, int check) |
0f2d19dd JB |
474 | { |
475 | SCM env = genv; | |
e3173f93 | 476 | register SCM *al, fl, var = SCM_CAR (vloc); |
0f2d19dd | 477 | register SCM iloc = SCM_ILOC00; |
0f2d19dd JB |
478 | for (; SCM_NIMP (env); env = SCM_CDR (env)) |
479 | { | |
790071cd | 480 | if (!SCM_CONSP (SCM_CAR (env))) |
0f2d19dd | 481 | break; |
a23afe53 | 482 | al = SCM_CARLOC (env); |
0f2d19dd JB |
483 | for (fl = SCM_CAR (*al); SCM_NIMP (fl); fl = SCM_CDR (fl)) |
484 | { | |
01f11e02 | 485 | if (!SCM_CONSP (fl)) |
33b97402 | 486 | { |
cf498326 | 487 | if (SCM_EQ_P (fl, var)) |
0f2d19dd | 488 | { |
cf498326 | 489 | if (! SCM_EQ_P (SCM_CAR (vloc), var)) |
f8769b1d | 490 | goto race; |
3201d763 | 491 | SCM_SET_CELL_WORD_0 (vloc, SCM_UNPACK (iloc) + SCM_ICDR); |
a23afe53 | 492 | return SCM_CDRLOC (*al); |
0f2d19dd | 493 | } |
33b97402 MD |
494 | else |
495 | break; | |
496 | } | |
a23afe53 | 497 | al = SCM_CDRLOC (*al); |
cf498326 | 498 | if (SCM_EQ_P (SCM_CAR (fl), var)) |
0f2d19dd | 499 | { |
0f2d19dd JB |
500 | if (SCM_UNBNDP (SCM_CAR (*al))) |
501 | { | |
502 | env = SCM_EOL; | |
503 | goto errout; | |
504 | } | |
c6772927 | 505 | if (!SCM_EQ_P (SCM_CAR (vloc), var)) |
f8769b1d | 506 | goto race; |
a23afe53 | 507 | SCM_SETCAR (vloc, iloc); |
a23afe53 | 508 | return SCM_CARLOC (*al); |
0f2d19dd | 509 | } |
3201d763 | 510 | iloc = SCM_PACK (SCM_UNPACK (iloc) + SCM_IDINC); |
0f2d19dd | 511 | } |
3201d763 | 512 | iloc = SCM_PACK ((~SCM_IDSTMSK) & (SCM_UNPACK(iloc) + SCM_IFRINC)); |
0f2d19dd JB |
513 | } |
514 | { | |
86d31dfe | 515 | SCM top_thunk, real_var; |
790071cd | 516 | if (SCM_NIMP (env)) |
0f2d19dd | 517 | { |
86d31dfe MV |
518 | top_thunk = SCM_CAR (env); /* env now refers to a |
519 | top level env thunk */ | |
0f2d19dd JB |
520 | env = SCM_CDR (env); |
521 | } | |
522 | else | |
523 | top_thunk = SCM_BOOL_F; | |
86d31dfe MV |
524 | real_var = scm_sym2var (var, top_thunk, SCM_BOOL_F); |
525 | if (SCM_FALSEP (real_var)) | |
0f2d19dd | 526 | goto errout; |
86d31dfe | 527 | |
01f11e02 | 528 | if (!SCM_NULLP (env) || SCM_UNBNDP (SCM_VARIABLE_REF (real_var))) |
86d31dfe MV |
529 | { |
530 | errout: | |
86d31dfe MV |
531 | if (check) |
532 | { | |
533 | if (SCM_NULLP (env)) | |
534 | scm_error (scm_unbound_variable_key, NULL, | |
535 | "Unbound variable: ~S", | |
8ea46249 | 536 | scm_list_1 (var), SCM_BOOL_F); |
86d31dfe MV |
537 | else |
538 | scm_misc_error (NULL, "Damaged environment: ~S", | |
8ea46249 | 539 | scm_list_1 (var)); |
86d31dfe MV |
540 | } |
541 | else | |
542 | { | |
543 | /* A variable could not be found, but we shall | |
544 | not throw an error. */ | |
545 | static SCM undef_object = SCM_UNDEFINED; | |
546 | return &undef_object; | |
547 | } | |
09e4d064 | 548 | } |
86d31dfe | 549 | |
c6772927 | 550 | if (!SCM_EQ_P (SCM_CAR (vloc), var)) |
86d31dfe MV |
551 | { |
552 | /* Some other thread has changed the very cell we are working | |
553 | on. In effect, it must have done our job or messed it up | |
554 | completely. */ | |
555 | race: | |
556 | var = SCM_CAR (vloc); | |
d22a0ea1 MV |
557 | if (SCM_VARIABLEP (var)) |
558 | return SCM_VARIABLE_LOC (var); | |
86d31dfe MV |
559 | if (SCM_ITAG7 (var) == SCM_ITAG7 (SCM_ILOC00)) |
560 | return scm_ilookup (var, genv); | |
904a077d | 561 | /* We can't cope with anything else than variables and ilocs. When |
86d31dfe MV |
562 | a special form has been memoized (i.e. `let' into `#@let') we |
563 | return NULL and expect the calling function to do the right | |
564 | thing. For the evaluator, this means going back and redoing | |
565 | the dispatch on the car of the form. */ | |
566 | return NULL; | |
567 | } | |
f8769b1d | 568 | |
d22a0ea1 | 569 | SCM_SETCAR (vloc, real_var); |
86d31dfe MV |
570 | return SCM_VARIABLE_LOC (real_var); |
571 | } | |
0f2d19dd JB |
572 | } |
573 | ||
f8769b1d | 574 | SCM * |
6e8d25a6 | 575 | scm_lookupcar (SCM vloc, SCM genv, int check) |
f8769b1d | 576 | { |
26d5b9b4 | 577 | SCM *loc = scm_lookupcar1 (vloc, genv, check); |
f8769b1d MV |
578 | if (loc == NULL) |
579 | abort (); | |
580 | return loc; | |
581 | } | |
f8769b1d | 582 | |
2a6f7afe DH |
583 | /* Return true if the symbol is - from the point of view of a macro |
584 | * transformer - a literal in the sense specified in chapter "pattern | |
585 | * language" of R5RS. In the code below, however, we don't match the | |
586 | * definition of R5RS exactly: It returns true if the identifier has no | |
587 | * binding or if it is a syntactic keyword. */ | |
588 | static int | |
589 | literal_p (const SCM symbol, const SCM env) | |
590 | { | |
591 | const SCM x = scm_cons (symbol, SCM_UNDEFINED); | |
592 | const SCM value = *scm_lookupcar (x, env, 0); | |
593 | if (SCM_UNBNDP (value) || SCM_MACROP (value)) | |
594 | return 1; | |
595 | else | |
596 | return 0; | |
597 | } | |
598 | ||
0f2d19dd | 599 | #define unmemocar scm_unmemocar |
1cc91f1b | 600 | |
86d31dfe MV |
601 | SCM_SYMBOL (sym_three_question_marks, "???"); |
602 | ||
0f2d19dd | 603 | SCM |
6e8d25a6 | 604 | scm_unmemocar (SCM form, SCM env) |
0f2d19dd | 605 | { |
302c12b4 | 606 | if (!SCM_CONSP (form)) |
0f2d19dd | 607 | return form; |
302c12b4 | 608 | else |
d22a0ea1 | 609 | { |
302c12b4 DH |
610 | SCM c = SCM_CAR (form); |
611 | if (SCM_VARIABLEP (c)) | |
612 | { | |
613 | SCM sym = scm_module_reverse_lookup (scm_env_module (env), c); | |
614 | if (SCM_FALSEP (sym)) | |
615 | sym = sym_three_question_marks; | |
616 | SCM_SETCAR (form, sym); | |
617 | } | |
302c12b4 DH |
618 | else if (SCM_ILOCP (c)) |
619 | { | |
620 | unsigned long int ir; | |
621 | ||
622 | for (ir = SCM_IFRAME (c); ir != 0; --ir) | |
623 | env = SCM_CDR (env); | |
624 | env = SCM_CAAR (env); | |
625 | for (ir = SCM_IDIST (c); ir != 0; --ir) | |
626 | env = SCM_CDR (env); | |
627 | SCM_SETCAR (form, SCM_ICDRP (c) ? env : SCM_CAR (env)); | |
628 | } | |
302c12b4 DH |
629 | return form; |
630 | } | |
0f2d19dd JB |
631 | } |
632 | ||
1cc91f1b | 633 | |
0f2d19dd | 634 | SCM |
6e8d25a6 | 635 | scm_eval_car (SCM pair, SCM env) |
0f2d19dd | 636 | { |
6cb702da | 637 | return SCM_XEVALCAR (pair, env); |
0f2d19dd JB |
638 | } |
639 | ||
640 | \f | |
641 | /* | |
642 | * The following rewrite expressions and | |
643 | * some memoized forms have different syntax | |
644 | */ | |
645 | ||
85db4a2c DH |
646 | SCM_GLOBAL_SYMBOL (scm_sym_else, "else"); |
647 | SCM_GLOBAL_SYMBOL (scm_sym_unquote, "unquote"); | |
648 | SCM_GLOBAL_SYMBOL (scm_sym_uq_splicing, "unquote-splicing"); | |
81123e6d | 649 | |
85db4a2c DH |
650 | SCM_GLOBAL_SYMBOL (scm_sym_enter_frame, "enter-frame"); |
651 | SCM_GLOBAL_SYMBOL (scm_sym_apply_frame, "apply-frame"); | |
652 | SCM_GLOBAL_SYMBOL (scm_sym_exit_frame, "exit-frame"); | |
653 | SCM_GLOBAL_SYMBOL (scm_sym_trace, "trace"); | |
0f2d19dd | 654 | |
0f2d19dd | 655 | |
26d5b9b4 MD |
656 | /* Check that the body denoted by XORIG is valid and rewrite it into |
657 | its internal form. The internal form of a body is just the body | |
658 | itself, but prefixed with an ISYM that denotes to what kind of | |
659 | outer construct this body belongs. A lambda body starts with | |
660 | SCM_IM_LAMBDA, for example, a body of a let starts with SCM_IM_LET, | |
661 | etc. The one exception is a body that belongs to a letrec that has | |
662 | been formed by rewriting internal defines: it starts with | |
663 | SCM_IM_DEFINE. */ | |
664 | ||
665 | /* XXX - Besides controlling the rewriting of internal defines, the | |
666 | additional ISYM could be used for improved error messages. | |
667 | This is not done yet. */ | |
668 | ||
669 | static SCM | |
6e8d25a6 | 670 | scm_m_body (SCM op, SCM xorig, const char *what) |
26d5b9b4 | 671 | { |
e90c3a89 | 672 | SCM_ASSYNT (scm_ilength (xorig) >= 1, s_body, what); |
26d5b9b4 MD |
673 | |
674 | /* Don't add another ISYM if one is present already. */ | |
675 | if (SCM_ISYMP (SCM_CAR (xorig))) | |
676 | return xorig; | |
677 | ||
678 | /* Retain possible doc string. */ | |
44d3cb0d | 679 | if (!SCM_CONSP (SCM_CAR (xorig))) |
26d5b9b4 | 680 | { |
8ea46249 | 681 | if (!SCM_NULLP (SCM_CDR (xorig))) |
26d5b9b4 | 682 | return scm_cons (SCM_CAR (xorig), |
8ea46249 | 683 | scm_m_body (op, SCM_CDR (xorig), what)); |
26d5b9b4 MD |
684 | return xorig; |
685 | } | |
686 | ||
ab66ae47 | 687 | return scm_cons (op, xorig); |
26d5b9b4 MD |
688 | } |
689 | ||
1cc91f1b | 690 | |
9fbee57e | 691 | /* Start of the memoizers for the standard R5RS builtin macros. */ |
0f2d19dd JB |
692 | |
693 | ||
3b88ed2a | 694 | SCM_SYNTAX (s_and, "and", scm_i_makbimacro, scm_m_and); |
8ea46249 | 695 | SCM_GLOBAL_SYMBOL (scm_sym_and, s_and); |
1cc91f1b | 696 | |
8ea46249 | 697 | SCM |
e6729603 | 698 | scm_m_and (SCM expr, SCM env SCM_UNUSED) |
0f2d19dd | 699 | { |
e6729603 DH |
700 | const SCM cdr_expr = SCM_CDR (expr); |
701 | const long length = scm_ilength (cdr_expr); | |
702 | ||
703 | ASSERT_SYNTAX (length >= 0, s_bad_expression, expr); | |
704 | ||
705 | if (length == 0) | |
706 | { | |
707 | /* Special case: (and) is replaced by #t. */ | |
708 | return SCM_BOOL_T; | |
709 | } | |
0f2d19dd | 710 | else |
e6729603 DH |
711 | { |
712 | SCM_SETCAR (expr, SCM_IM_AND); | |
713 | return expr; | |
714 | } | |
0f2d19dd JB |
715 | } |
716 | ||
1cc91f1b | 717 | |
3b88ed2a | 718 | SCM_SYNTAX (s_begin, "begin", scm_i_makbimacro, scm_m_begin); |
9fbee57e | 719 | SCM_GLOBAL_SYMBOL (scm_sym_begin, s_begin); |
8ea46249 DH |
720 | |
721 | SCM | |
2a6f7afe | 722 | scm_m_begin (SCM expr, SCM env SCM_UNUSED) |
0f2d19dd | 723 | { |
2a6f7afe DH |
724 | const SCM cdr_expr = SCM_CDR (expr); |
725 | ||
726 | ASSERT_SYNTAX (scm_ilength (cdr_expr) >= 0, s_bad_expression, expr); | |
727 | ||
728 | SCM_SETCAR (expr, SCM_IM_BEGIN); | |
729 | return expr; | |
0f2d19dd JB |
730 | } |
731 | ||
732 | ||
3b88ed2a | 733 | SCM_SYNTAX (s_case, "case", scm_i_makbimacro, scm_m_case); |
8ea46249 | 734 | SCM_GLOBAL_SYMBOL (scm_sym_case, s_case); |
1cc91f1b | 735 | |
8ea46249 | 736 | SCM |
2a6f7afe | 737 | scm_m_case (SCM expr, SCM env) |
0f2d19dd | 738 | { |
8ea46249 | 739 | SCM clauses; |
2a6f7afe DH |
740 | SCM all_labels = SCM_EOL; |
741 | ||
742 | /* Check, whether 'else is a literal, i. e. not bound to a value. */ | |
743 | const int else_literal_p = literal_p (scm_sym_else, env); | |
744 | ||
745 | const SCM cdr_expr = SCM_CDR (expr); | |
746 | ASSERT_SYNTAX (scm_ilength (cdr_expr) >= 0, s_bad_expression, expr); | |
747 | ASSERT_SYNTAX (scm_ilength (cdr_expr) >= 2, s_missing_clauses, expr); | |
748 | ||
749 | clauses = SCM_CDR (cdr_expr); | |
8ea46249 | 750 | while (!SCM_NULLP (clauses)) |
0f2d19dd | 751 | { |
2a6f7afe DH |
752 | SCM labels; |
753 | ||
754 | const SCM clause = SCM_CAR (clauses); | |
755 | ASSERT_SYNTAX_2 (scm_ilength (clause) >= 2, | |
756 | s_bad_case_clause, clause, expr); | |
757 | ||
758 | labels = SCM_CAR (clause); | |
759 | if (SCM_CONSP (labels)) | |
760 | { | |
761 | ASSERT_SYNTAX_2 (scm_ilength (labels) >= 0, | |
762 | s_bad_case_labels, labels, expr); | |
763 | all_labels = scm_append_x (scm_list_2 (labels, all_labels)); | |
764 | } | |
58a2510b DH |
765 | else if (SCM_NULLP (labels)) |
766 | { | |
767 | /* The list of labels is empty. According to R5RS this is allowed. | |
768 | * It means that the sequence of expressions will never be executed. | |
769 | * Therefore, as an optimization, we could remove the whole | |
770 | * clause. */ | |
771 | } | |
2a6f7afe DH |
772 | else |
773 | { | |
774 | ASSERT_SYNTAX_2 (SCM_EQ_P (labels, scm_sym_else) && else_literal_p, | |
775 | s_bad_case_labels, labels, expr); | |
776 | ASSERT_SYNTAX_2 (SCM_NULLP (SCM_CDR (clauses)), | |
609a8b86 | 777 | s_misplaced_else_clause, clause, expr); |
2a6f7afe DH |
778 | } |
779 | ||
780 | /* build the new clause */ | |
781 | if (SCM_EQ_P (labels, scm_sym_else)) | |
782 | SCM_SETCAR (clause, SCM_IM_ELSE); | |
783 | ||
8ea46249 | 784 | clauses = SCM_CDR (clauses); |
0f2d19dd | 785 | } |
2a6f7afe DH |
786 | |
787 | /* Check whether all case labels are distinct. */ | |
788 | for (; !SCM_NULLP (all_labels); all_labels = SCM_CDR (all_labels)) | |
789 | { | |
790 | const SCM label = SCM_CAR (all_labels); | |
791 | SCM label_idx = SCM_CDR (all_labels); | |
792 | for (; !SCM_NULLP (label_idx); label_idx = SCM_CDR (label_idx)) | |
793 | { | |
794 | ASSERT_SYNTAX_2 (!SCM_EQ_P (SCM_CAR (label_idx), label), | |
795 | s_duplicate_case_label, label, expr); | |
796 | } | |
797 | } | |
798 | ||
799 | SCM_SETCAR (expr, SCM_IM_CASE); | |
800 | return expr; | |
0f2d19dd JB |
801 | } |
802 | ||
803 | ||
3b88ed2a | 804 | SCM_SYNTAX (s_cond, "cond", scm_i_makbimacro, scm_m_cond); |
8ea46249 | 805 | SCM_GLOBAL_SYMBOL (scm_sym_cond, s_cond); |
609a8b86 | 806 | SCM_GLOBAL_SYMBOL (scm_sym_arrow, "=>"); |
1cc91f1b | 807 | |
8ea46249 | 808 | SCM |
609a8b86 | 809 | scm_m_cond (SCM expr, SCM env) |
0f2d19dd | 810 | { |
609a8b86 DH |
811 | /* Check, whether 'else or '=> is a literal, i. e. not bound to a value. */ |
812 | const int else_literal_p = literal_p (scm_sym_else, env); | |
813 | const int arrow_literal_p = literal_p (scm_sym_arrow, env); | |
814 | ||
815 | const SCM clauses = SCM_CDR (expr); | |
816 | SCM clause_idx; | |
817 | ||
818 | ASSERT_SYNTAX (scm_ilength (clauses) >= 0, s_bad_expression, expr); | |
819 | ASSERT_SYNTAX (scm_ilength (clauses) >= 1, s_missing_clauses, expr); | |
820 | ||
821 | for (clause_idx = clauses; | |
822 | !SCM_NULLP (clause_idx); | |
823 | clause_idx = SCM_CDR (clause_idx)) | |
0f2d19dd | 824 | { |
609a8b86 DH |
825 | SCM test; |
826 | ||
827 | const SCM clause = SCM_CAR (clause_idx); | |
828 | const long length = scm_ilength (clause); | |
829 | ASSERT_SYNTAX_2 (length >= 1, s_bad_cond_clause, clause, expr); | |
830 | ||
831 | test = SCM_CAR (clause); | |
832 | if (SCM_EQ_P (test, scm_sym_else) && else_literal_p) | |
0f2d19dd | 833 | { |
609a8b86 DH |
834 | const int last_clause_p = SCM_NULLP (SCM_CDR (clause_idx)); |
835 | ASSERT_SYNTAX_2 (length >= 2, | |
836 | s_bad_cond_clause, clause, expr); | |
837 | ASSERT_SYNTAX_2 (last_clause_p, | |
838 | s_misplaced_else_clause, clause, expr); | |
839 | SCM_SETCAR (clause, SCM_IM_ELSE); | |
0f2d19dd | 840 | } |
609a8b86 DH |
841 | else if (length >= 2 |
842 | && SCM_EQ_P (SCM_CADR (clause), scm_sym_arrow) | |
843 | && arrow_literal_p) | |
844 | { | |
845 | ASSERT_SYNTAX_2 (length > 2, s_missing_recipient, clause, expr); | |
846 | ASSERT_SYNTAX_2 (length == 3, s_extra_expression, clause, expr); | |
847 | SCM_SETCAR (SCM_CDR (clause), SCM_IM_ARROW); | |
8ea46249 | 848 | } |
0f2d19dd | 849 | } |
609a8b86 DH |
850 | |
851 | SCM_SETCAR (expr, SCM_IM_COND); | |
852 | return expr; | |
0f2d19dd JB |
853 | } |
854 | ||
1cc91f1b | 855 | |
3b88ed2a | 856 | SCM_SYNTAX(s_define, "define", scm_i_makbimacro, scm_m_define); |
9fbee57e | 857 | SCM_GLOBAL_SYMBOL(scm_sym_define, s_define); |
5280aaca | 858 | |
9fbee57e DH |
859 | /* Guile provides an extension to R5RS' define syntax to represent function |
860 | * currying in a compact way. With this extension, it is allowed to write | |
861 | * (define <nested-variable> <body>), where <nested-variable> has of one of | |
862 | * the forms (<nested-variable> <formals>), (<nested-variable> . <formal>), | |
863 | * (<variable> <formals>) or (<variable> . <formal>). As in R5RS, <formals> | |
864 | * should be either a sequence of zero or more variables, or a sequence of one | |
865 | * or more variables followed by a space-delimited period and another | |
866 | * variable. Each level of argument nesting wraps the <body> within another | |
867 | * lambda expression. For example, the following forms are allowed, each one | |
868 | * followed by an equivalent, more explicit implementation. | |
869 | * Example 1: | |
870 | * (define ((a b . c) . d) <body>) is equivalent to | |
871 | * (define a (lambda (b . c) (lambda d <body>))) | |
872 | * Example 2: | |
873 | * (define (((a) b) c . d) <body>) is equivalent to | |
874 | * (define a (lambda () (lambda (b) (lambda (c . d) <body>)))) | |
875 | */ | |
876 | /* Dirk:FIXME:: We should provide an implementation for 'define' in the R5RS | |
877 | * module that does not implement this extension. */ | |
878 | SCM | |
cc56ba80 | 879 | scm_m_define (SCM expr, SCM env) |
5280aaca | 880 | { |
cc56ba80 DH |
881 | SCM body; |
882 | SCM variable; | |
883 | ||
884 | const SCM cdr_expr = SCM_CDR (expr); | |
885 | ASSERT_SYNTAX (scm_ilength (cdr_expr) >= 0, s_bad_expression, expr); | |
886 | ASSERT_SYNTAX (scm_ilength (cdr_expr) >= 2, s_missing_expression, expr); | |
887 | ||
888 | body = SCM_CDR (cdr_expr); | |
889 | variable = SCM_CAR (cdr_expr); | |
890 | while (SCM_CONSP (variable)) | |
5280aaca | 891 | { |
cc56ba80 DH |
892 | /* This while loop realizes function currying by variable nesting. |
893 | * Variable is known to be a nested-variable. In every iteration of the | |
894 | * loop another level of lambda expression is created, starting with the | |
895 | * innermost one. */ | |
896 | const SCM formals = SCM_CDR (variable); | |
897 | const SCM tail = scm_cons (formals, body); | |
898 | ||
899 | /* Add source properties to each new lambda expression: */ | |
900 | const SCM lambda = scm_cons_source (variable, scm_sym_lambda, tail); | |
901 | ||
902 | body = scm_list_1 (lambda); | |
903 | variable = SCM_CAR (variable); | |
5280aaca | 904 | } |
cc56ba80 DH |
905 | ASSERT_SYNTAX_2 (SCM_SYMBOLP (variable), s_bad_variable, variable, expr); |
906 | ASSERT_SYNTAX (scm_ilength (body) == 1, s_expression, expr); | |
907 | ||
9fbee57e | 908 | if (SCM_TOP_LEVEL (env)) |
0f2d19dd | 909 | { |
9fbee57e | 910 | SCM var; |
cc56ba80 | 911 | const SCM value = scm_eval_car (body, env); |
9fbee57e DH |
912 | if (SCM_REC_PROCNAMES_P) |
913 | { | |
cc56ba80 | 914 | SCM tmp = value; |
9fbee57e DH |
915 | while (SCM_MACROP (tmp)) |
916 | tmp = SCM_MACRO_CODE (tmp); | |
917 | if (SCM_CLOSUREP (tmp) | |
918 | /* Only the first definition determines the name. */ | |
919 | && SCM_FALSEP (scm_procedure_property (tmp, scm_sym_name))) | |
cc56ba80 | 920 | scm_set_procedure_property_x (tmp, scm_sym_name, variable); |
9fbee57e | 921 | } |
cc56ba80 DH |
922 | var = scm_sym2var (variable, scm_env_top_level (env), SCM_BOOL_T); |
923 | SCM_VARIABLE_SET (var, value); | |
9fbee57e | 924 | return SCM_UNSPECIFIED; |
26d5b9b4 | 925 | } |
9fbee57e | 926 | else |
cc56ba80 DH |
927 | { |
928 | SCM_SETCAR (expr, SCM_IM_DEFINE); | |
929 | SCM_SETCAR (cdr_expr, variable); | |
930 | SCM_SETCDR (cdr_expr, body); | |
931 | return expr; | |
932 | } | |
0f2d19dd JB |
933 | } |
934 | ||
935 | ||
8ae95199 DH |
936 | /* This is a helper function for forms (<keyword> <expression>) that are |
937 | * transformed into (#@<keyword> '() <memoized_expression>) in order to allow | |
938 | * for easy creation of a thunk (i. e. a closure without arguments) using the | |
939 | * ('() <memoized_expression>) tail of the memoized form. */ | |
940 | static SCM | |
941 | memoize_as_thunk_prototype (const SCM expr, const SCM env SCM_UNUSED) | |
942 | { | |
943 | const SCM cdr_expr = SCM_CDR (expr); | |
944 | ASSERT_SYNTAX (scm_ilength (cdr_expr) >= 0, s_bad_expression, expr); | |
945 | ASSERT_SYNTAX (scm_ilength (cdr_expr) == 1, s_expression, expr); | |
946 | ||
947 | SCM_SETCDR (expr, scm_cons (SCM_EOL, cdr_expr)); | |
948 | ||
949 | return expr; | |
950 | } | |
951 | ||
952 | ||
3b88ed2a | 953 | SCM_SYNTAX (s_delay, "delay", scm_i_makbimacro, scm_m_delay); |
9fbee57e | 954 | SCM_GLOBAL_SYMBOL (scm_sym_delay, s_delay); |
1cc91f1b | 955 | |
9fbee57e DH |
956 | /* Promises are implemented as closures with an empty parameter list. Thus, |
957 | * (delay <expression>) is transformed into (#@delay '() <expression>), where | |
958 | * the empty list represents the empty parameter list. This representation | |
959 | * allows for easy creation of the closure during evaluation. */ | |
8ea46249 | 960 | SCM |
8ae95199 | 961 | scm_m_delay (SCM expr, SCM env) |
0f2d19dd | 962 | { |
8ae95199 DH |
963 | const SCM new_expr = memoize_as_thunk_prototype (expr, env); |
964 | SCM_SETCAR (new_expr, SCM_IM_DELAY); | |
965 | return new_expr; | |
0f2d19dd JB |
966 | } |
967 | ||
8ea46249 | 968 | |
302c12b4 DH |
969 | /* DO gets the most radically altered syntax. The order of the vars is |
970 | * reversed here. In contrast, the order of the inits and steps is reversed | |
971 | * during the evaluation: | |
972 | ||
0f2d19dd JB |
973 | (do ((<var1> <init1> <step1>) |
974 | (<var2> <init2>) | |
975 | ... ) | |
976 | (<test> <return>) | |
977 | <body>) | |
302c12b4 | 978 | |
0f2d19dd | 979 | ;; becomes |
302c12b4 | 980 | |
e681d187 DH |
981 | (#@do (<init1> <init2> ... <initn>) |
982 | (varn ... var2 var1) | |
0f2d19dd JB |
983 | (<test> <return>) |
984 | (<body>) | |
985 | <step1> <step2> ... <stepn>) ;; missing steps replaced by var | |
302c12b4 | 986 | */ |
0f2d19dd | 987 | |
3b88ed2a | 988 | SCM_SYNTAX(s_do, "do", scm_i_makbimacro, scm_m_do); |
2f0d1375 | 989 | SCM_GLOBAL_SYMBOL(scm_sym_do, s_do); |
1cc91f1b | 990 | |
0f2d19dd | 991 | SCM |
e81d98ec | 992 | scm_m_do (SCM xorig, SCM env SCM_UNUSED) |
0f2d19dd | 993 | { |
8ea46249 DH |
994 | SCM bindings; |
995 | SCM x = SCM_CDR (xorig); | |
996 | SCM vars = SCM_EOL; | |
997 | SCM inits = SCM_EOL; | |
998 | SCM *initloc = &inits; | |
999 | SCM steps = SCM_EOL; | |
1000 | SCM *steploc = &steps; | |
e90c3a89 | 1001 | SCM_ASSYNT (scm_ilength (x) >= 2, s_test, "do"); |
8ea46249 | 1002 | bindings = SCM_CAR (x); |
e90c3a89 | 1003 | SCM_ASSYNT (scm_ilength (bindings) >= 0, s_bindings, "do"); |
8ea46249 | 1004 | while (!SCM_NULLP (bindings)) |
0f2d19dd | 1005 | { |
302c12b4 DH |
1006 | SCM binding = SCM_CAR (bindings); |
1007 | long len = scm_ilength (binding); | |
e90c3a89 | 1008 | SCM_ASSYNT (len == 2 || len == 3, s_bindings, "do"); |
302c12b4 DH |
1009 | { |
1010 | SCM name = SCM_CAR (binding); | |
1011 | SCM init = SCM_CADR (binding); | |
1012 | SCM step = (len == 2) ? name : SCM_CADDR (binding); | |
e90c3a89 | 1013 | SCM_ASSYNT (SCM_SYMBOLP (name), s_variable, "do"); |
302c12b4 DH |
1014 | vars = scm_cons (name, vars); |
1015 | *initloc = scm_list_1 (init); | |
1016 | initloc = SCM_CDRLOC (*initloc); | |
1017 | *steploc = scm_list_1 (step); | |
1018 | steploc = SCM_CDRLOC (*steploc); | |
1019 | bindings = SCM_CDR (bindings); | |
1020 | } | |
0f2d19dd JB |
1021 | } |
1022 | x = SCM_CDR (x); | |
e90c3a89 | 1023 | SCM_ASSYNT (scm_ilength (SCM_CAR (x)) >= 1, s_test, "do"); |
0f2d19dd | 1024 | x = scm_cons2 (SCM_CAR (x), SCM_CDR (x), steps); |
e681d187 | 1025 | x = scm_cons2 (inits, vars, x); |
3a3111a8 | 1026 | return scm_cons (SCM_IM_DO, x); |
0f2d19dd JB |
1027 | } |
1028 | ||
b8229a3b | 1029 | |
3b88ed2a | 1030 | SCM_SYNTAX (s_if, "if", scm_i_makbimacro, scm_m_if); |
9fbee57e | 1031 | SCM_GLOBAL_SYMBOL (scm_sym_if, s_if); |
b8229a3b | 1032 | |
9fbee57e DH |
1033 | SCM |
1034 | scm_m_if (SCM xorig, SCM env SCM_UNUSED) | |
0f2d19dd | 1035 | { |
9fbee57e | 1036 | long len = scm_ilength (SCM_CDR (xorig)); |
e90c3a89 | 1037 | SCM_ASSYNT (len >= 2 && len <= 3, s_expression, s_if); |
9fbee57e | 1038 | return scm_cons (SCM_IM_IF, SCM_CDR (xorig)); |
0f2d19dd JB |
1039 | } |
1040 | ||
302c12b4 | 1041 | |
3b88ed2a | 1042 | SCM_SYNTAX (s_lambda, "lambda", scm_i_makbimacro, scm_m_lambda); |
9fbee57e | 1043 | SCM_GLOBAL_SYMBOL (scm_sym_lambda, s_lambda); |
0f2d19dd | 1044 | |
9fbee57e DH |
1045 | /* Return true if OBJ is `eq?' to one of the elements of LIST or to the |
1046 | * cdr of the last cons. (Thus, LIST is not required to be a proper | |
1047 | * list and OBJ can also be found in the improper ending.) */ | |
1048 | static int | |
1049 | scm_c_improper_memq (SCM obj, SCM list) | |
5cb22e96 | 1050 | { |
9fbee57e DH |
1051 | for (; SCM_CONSP (list); list = SCM_CDR (list)) |
1052 | { | |
1053 | if (SCM_EQ_P (SCM_CAR (list), obj)) | |
1054 | return 1; | |
1055 | } | |
1056 | return SCM_EQ_P (list, obj); | |
5cb22e96 DH |
1057 | } |
1058 | ||
28d52ebb | 1059 | SCM |
9fbee57e | 1060 | scm_m_lambda (SCM xorig, SCM env SCM_UNUSED) |
28d52ebb | 1061 | { |
9fbee57e DH |
1062 | SCM formals; |
1063 | SCM x = SCM_CDR (xorig); | |
28d52ebb | 1064 | |
e90c3a89 | 1065 | SCM_ASSYNT (SCM_CONSP (x), s_formals, s_lambda); |
1cc91f1b | 1066 | |
9fbee57e DH |
1067 | formals = SCM_CAR (x); |
1068 | while (SCM_CONSP (formals)) | |
0f2d19dd | 1069 | { |
9fbee57e | 1070 | SCM formal = SCM_CAR (formals); |
e90c3a89 | 1071 | SCM_ASSYNT (SCM_SYMBOLP (formal), s_formals, s_lambda); |
9fbee57e | 1072 | if (scm_c_improper_memq (formal, SCM_CDR (formals))) |
e90c3a89 | 1073 | scm_misc_error (s_lambda, s_duplicate_formals, SCM_EOL); |
9fbee57e | 1074 | formals = SCM_CDR (formals); |
0f2d19dd | 1075 | } |
9fbee57e | 1076 | if (!SCM_NULLP (formals) && !SCM_SYMBOLP (formals)) |
e90c3a89 | 1077 | scm_misc_error (s_lambda, s_formals, SCM_EOL); |
9fbee57e DH |
1078 | |
1079 | return scm_cons2 (SCM_IM_LAMBDA, SCM_CAR (x), | |
1080 | scm_m_body (SCM_IM_LAMBDA, SCM_CDR (x), s_lambda)); | |
0f2d19dd | 1081 | } |
6dbd0af5 | 1082 | |
0f2d19dd | 1083 | |
302c12b4 DH |
1084 | /* The bindings ((v1 i1) (v2 i2) ... (vn in)) are transformed to the lists |
1085 | * (vn ... v2 v1) and (i1 i2 ... in). That is, the list of variables is | |
1086 | * reversed here, the list of inits gets reversed during evaluation. */ | |
1087 | static void | |
1088 | transform_bindings (SCM bindings, SCM *rvarloc, SCM *initloc, const char *what) | |
0f2d19dd | 1089 | { |
302c12b4 DH |
1090 | SCM rvars = SCM_EOL; |
1091 | *rvarloc = SCM_EOL; | |
1092 | *initloc = SCM_EOL; | |
1093 | ||
e90c3a89 | 1094 | SCM_ASSYNT (scm_ilength (bindings) >= 1, s_bindings, what); |
0f2d19dd | 1095 | |
0f2d19dd JB |
1096 | do |
1097 | { | |
302c12b4 | 1098 | SCM binding = SCM_CAR (bindings); |
e90c3a89 DH |
1099 | SCM_ASSYNT (scm_ilength (binding) == 2, s_bindings, what); |
1100 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (binding)), s_variable, what); | |
302c12b4 | 1101 | if (scm_c_improper_memq (SCM_CAR (binding), rvars)) |
e90c3a89 | 1102 | scm_misc_error (what, s_duplicate_bindings, SCM_EOL); |
302c12b4 DH |
1103 | rvars = scm_cons (SCM_CAR (binding), rvars); |
1104 | *initloc = scm_list_1 (SCM_CADR (binding)); | |
a23afe53 | 1105 | initloc = SCM_CDRLOC (*initloc); |
302c12b4 | 1106 | bindings = SCM_CDR (bindings); |
0f2d19dd | 1107 | } |
302c12b4 | 1108 | while (!SCM_NULLP (bindings)); |
26d5b9b4 | 1109 | |
302c12b4 | 1110 | *rvarloc = rvars; |
0f2d19dd JB |
1111 | } |
1112 | ||
302c12b4 | 1113 | |
3b88ed2a | 1114 | SCM_SYNTAX(s_let, "let", scm_i_makbimacro, scm_m_let); |
2f0d1375 | 1115 | SCM_GLOBAL_SYMBOL(scm_sym_let, s_let); |
b8229a3b | 1116 | |
302c12b4 | 1117 | SCM |
6e8d25a6 | 1118 | scm_m_let (SCM xorig, SCM env) |
0f2d19dd | 1119 | { |
302c12b4 DH |
1120 | SCM x = SCM_CDR (xorig); |
1121 | SCM temp; | |
1122 | ||
e90c3a89 | 1123 | SCM_ASSYNT (SCM_CONSP (x), s_bindings, s_let); |
302c12b4 DH |
1124 | temp = SCM_CAR (x); |
1125 | if (SCM_NULLP (temp) | |
1126 | || (scm_ilength (temp) == 1 && SCM_CONSP (SCM_CAR (temp)))) | |
26d5b9b4 MD |
1127 | { |
1128 | /* null or single binding, let* is faster */ | |
3096b33f | 1129 | SCM bindings = temp; |
302c12b4 | 1130 | SCM body = scm_m_body (SCM_IM_LET, SCM_CDR (x), s_let); |
3096b33f | 1131 | return scm_m_letstar (scm_cons2 (SCM_CAR (xorig), bindings, body), env); |
26d5b9b4 | 1132 | } |
302c12b4 | 1133 | else if (SCM_CONSP (temp)) |
26d5b9b4 | 1134 | { |
3096b33f DH |
1135 | /* plain let */ |
1136 | SCM bindings = temp; | |
302c12b4 | 1137 | SCM rvars, inits, body; |
3096b33f | 1138 | transform_bindings (bindings, &rvars, &inits, "let"); |
302c12b4 DH |
1139 | body = scm_m_body (SCM_IM_LET, SCM_CDR (x), "let"); |
1140 | return scm_cons2 (SCM_IM_LET, rvars, scm_cons (inits, body)); | |
26d5b9b4 | 1141 | } |
302c12b4 DH |
1142 | else |
1143 | { | |
1144 | /* named let: Transform (let name ((var init) ...) body ...) into | |
1145 | * ((letrec ((name (lambda (var ...) body ...))) name) init ...) */ | |
26d5b9b4 | 1146 | |
302c12b4 DH |
1147 | SCM name = temp; |
1148 | SCM vars = SCM_EOL; | |
1149 | SCM *varloc = &vars; | |
1150 | SCM inits = SCM_EOL; | |
1151 | SCM *initloc = &inits; | |
1152 | SCM bindings; | |
1153 | ||
e90c3a89 | 1154 | SCM_ASSYNT (SCM_SYMBOLP (name), s_bindings, s_let); |
302c12b4 | 1155 | x = SCM_CDR (x); |
e90c3a89 | 1156 | SCM_ASSYNT (SCM_CONSP (x), s_bindings, s_let); |
302c12b4 | 1157 | bindings = SCM_CAR (x); |
e90c3a89 | 1158 | SCM_ASSYNT (scm_ilength (bindings) >= 0, s_bindings, s_let); |
302c12b4 DH |
1159 | while (!SCM_NULLP (bindings)) |
1160 | { /* vars and inits both in order */ | |
1161 | SCM binding = SCM_CAR (bindings); | |
e90c3a89 DH |
1162 | SCM_ASSYNT (scm_ilength (binding) == 2, s_bindings, s_let); |
1163 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (binding)), s_variable, s_let); | |
302c12b4 DH |
1164 | *varloc = scm_list_1 (SCM_CAR (binding)); |
1165 | varloc = SCM_CDRLOC (*varloc); | |
1166 | *initloc = scm_list_1 (SCM_CADR (binding)); | |
1167 | initloc = SCM_CDRLOC (*initloc); | |
1168 | bindings = SCM_CDR (bindings); | |
1169 | } | |
26d5b9b4 | 1170 | |
302c12b4 DH |
1171 | { |
1172 | SCM lambda_body = scm_m_body (SCM_IM_LET, SCM_CDR (x), "let"); | |
1173 | SCM lambda_form = scm_cons2 (scm_sym_lambda, vars, lambda_body); | |
1174 | SCM rvar = scm_list_1 (name); | |
1175 | SCM init = scm_list_1 (lambda_form); | |
1176 | SCM body = scm_m_body (SCM_IM_LET, scm_list_1 (name), "let"); | |
1177 | SCM letrec = scm_cons2 (SCM_IM_LETREC, rvar, scm_cons (init, body)); | |
1178 | return scm_cons (letrec, inits); | |
1179 | } | |
1180 | } | |
0f2d19dd JB |
1181 | } |
1182 | ||
1183 | ||
3b88ed2a | 1184 | SCM_SYNTAX (s_letstar, "let*", scm_i_makbimacro, scm_m_letstar); |
9fbee57e | 1185 | SCM_GLOBAL_SYMBOL (scm_sym_letstar, s_letstar); |
1cc91f1b | 1186 | |
9fbee57e DH |
1187 | /* (let* ((v1 i1) (v2 i2) ...) body) with variables v1 .. vk and initializers |
1188 | * i1 .. ik is transformed into the form (#@let* (v1 i1 v2 i2 ...) body*). */ | |
1189 | SCM | |
1190 | scm_m_letstar (SCM xorig, SCM env SCM_UNUSED) | |
0f2d19dd | 1191 | { |
9fbee57e DH |
1192 | SCM bindings; |
1193 | SCM x = SCM_CDR (xorig); | |
1194 | SCM vars = SCM_EOL; | |
1195 | SCM *varloc = &vars; | |
0f2d19dd | 1196 | |
e90c3a89 | 1197 | SCM_ASSYNT (SCM_CONSP (x), s_bindings, s_letstar); |
9fbee57e DH |
1198 | |
1199 | bindings = SCM_CAR (x); | |
e90c3a89 | 1200 | SCM_ASSYNT (scm_ilength (bindings) >= 0, s_bindings, s_letstar); |
9fbee57e DH |
1201 | while (!SCM_NULLP (bindings)) |
1202 | { | |
1203 | SCM binding = SCM_CAR (bindings); | |
e90c3a89 DH |
1204 | SCM_ASSYNT (scm_ilength (binding) == 2, s_bindings, s_letstar); |
1205 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (binding)), s_variable, s_letstar); | |
9fbee57e DH |
1206 | *varloc = scm_list_2 (SCM_CAR (binding), SCM_CADR (binding)); |
1207 | varloc = SCM_CDRLOC (SCM_CDR (*varloc)); | |
1208 | bindings = SCM_CDR (bindings); | |
1209 | } | |
1210 | ||
1211 | return scm_cons2 (SCM_IM_LETSTAR, vars, | |
1212 | scm_m_body (SCM_IM_LETSTAR, SCM_CDR (x), s_letstar)); | |
1213 | } | |
b8229a3b | 1214 | |
0f2d19dd | 1215 | |
3b88ed2a | 1216 | SCM_SYNTAX(s_letrec, "letrec", scm_i_makbimacro, scm_m_letrec); |
9fbee57e | 1217 | SCM_GLOBAL_SYMBOL(scm_sym_letrec, s_letrec); |
1cc91f1b | 1218 | |
0f2d19dd | 1219 | SCM |
9fbee57e | 1220 | scm_m_letrec (SCM xorig, SCM env) |
0f2d19dd | 1221 | { |
9fbee57e | 1222 | SCM x = SCM_CDR (xorig); |
e90c3a89 | 1223 | SCM_ASSYNT (SCM_CONSP (x), s_bindings, s_letrec); |
9fbee57e DH |
1224 | |
1225 | if (SCM_NULLP (SCM_CAR (x))) | |
1226 | { | |
1227 | /* null binding, let* faster */ | |
1228 | SCM body = scm_m_body (SCM_IM_LETREC, SCM_CDR (x), s_letrec); | |
1229 | return scm_m_letstar (scm_cons2 (SCM_CAR (xorig), SCM_EOL, body), env); | |
1230 | } | |
1231 | else | |
1232 | { | |
1233 | SCM rvars, inits, body; | |
1234 | transform_bindings (SCM_CAR (x), &rvars, &inits, "letrec"); | |
1235 | body = scm_m_body (SCM_IM_LETREC, SCM_CDR (x), "letrec"); | |
1236 | return scm_cons2 (SCM_IM_LETREC, rvars, scm_cons (inits, body)); | |
1237 | } | |
0f2d19dd JB |
1238 | } |
1239 | ||
73b64342 | 1240 | |
3b88ed2a | 1241 | SCM_SYNTAX (s_or, "or", scm_i_makbimacro, scm_m_or); |
9fbee57e | 1242 | SCM_GLOBAL_SYMBOL (scm_sym_or, s_or); |
73b64342 MD |
1243 | |
1244 | SCM | |
9fbee57e | 1245 | scm_m_or (SCM xorig, SCM env SCM_UNUSED) |
73b64342 | 1246 | { |
c014a02e | 1247 | long len = scm_ilength (SCM_CDR (xorig)); |
e90c3a89 | 1248 | SCM_ASSYNT (len >= 0, s_test, s_or); |
9fbee57e DH |
1249 | if (len >= 1) |
1250 | return scm_cons (SCM_IM_OR, SCM_CDR (xorig)); | |
1251 | else | |
1252 | return SCM_BOOL_F; | |
73b64342 MD |
1253 | } |
1254 | ||
73b64342 | 1255 | |
9fbee57e DH |
1256 | SCM_SYNTAX (s_quasiquote, "quasiquote", scm_makacro, scm_m_quasiquote); |
1257 | SCM_GLOBAL_SYMBOL (scm_sym_quasiquote, s_quasiquote); | |
1258 | ||
1259 | /* Internal function to handle a quasiquotation: 'form' is the parameter in | |
1260 | * the call (quasiquotation form), 'env' is the environment where unquoted | |
1261 | * expressions will be evaluated, and 'depth' is the current quasiquotation | |
1262 | * nesting level and is known to be greater than zero. */ | |
1263 | static SCM | |
1264 | iqq (SCM form, SCM env, unsigned long int depth) | |
73b64342 | 1265 | { |
9fbee57e | 1266 | if (SCM_CONSP (form)) |
c96d76b8 | 1267 | { |
9fbee57e DH |
1268 | SCM tmp = SCM_CAR (form); |
1269 | if (SCM_EQ_P (tmp, scm_sym_quasiquote)) | |
1270 | { | |
1271 | SCM args = SCM_CDR (form); | |
e90c3a89 | 1272 | SCM_ASSYNT (scm_ilength (args) == 1, s_expression, s_quasiquote); |
9fbee57e DH |
1273 | return scm_list_2 (tmp, iqq (SCM_CAR (args), env, depth + 1)); |
1274 | } | |
1275 | else if (SCM_EQ_P (tmp, scm_sym_unquote)) | |
1276 | { | |
1277 | SCM args = SCM_CDR (form); | |
e90c3a89 | 1278 | SCM_ASSYNT (scm_ilength (args) == 1, s_expression, s_quasiquote); |
9fbee57e DH |
1279 | if (depth - 1 == 0) |
1280 | return scm_eval_car (args, env); | |
1281 | else | |
1282 | return scm_list_2 (tmp, iqq (SCM_CAR (args), env, depth - 1)); | |
1283 | } | |
1284 | else if (SCM_CONSP (tmp) | |
1285 | && SCM_EQ_P (SCM_CAR (tmp), scm_sym_uq_splicing)) | |
1286 | { | |
1287 | SCM args = SCM_CDR (tmp); | |
e90c3a89 | 1288 | SCM_ASSYNT (scm_ilength (args) == 1, s_expression, s_quasiquote); |
9fbee57e DH |
1289 | if (depth - 1 == 0) |
1290 | { | |
1291 | SCM list = scm_eval_car (args, env); | |
1292 | SCM rest = SCM_CDR (form); | |
1293 | SCM_ASSYNT (scm_ilength (list) >= 0, s_splicing, s_quasiquote); | |
1294 | return scm_append (scm_list_2 (list, iqq (rest, env, depth))); | |
1295 | } | |
1296 | else | |
1297 | return scm_cons (iqq (SCM_CAR (form), env, depth - 1), | |
1298 | iqq (SCM_CDR (form), env, depth)); | |
1299 | } | |
1300 | else | |
1301 | return scm_cons (iqq (SCM_CAR (form), env, depth), | |
1302 | iqq (SCM_CDR (form), env, depth)); | |
1303 | } | |
1304 | else if (SCM_VECTORP (form)) | |
c96d76b8 | 1305 | { |
9fbee57e DH |
1306 | size_t i = SCM_VECTOR_LENGTH (form); |
1307 | SCM const *const data = SCM_VELTS (form); | |
1308 | SCM tmp = SCM_EOL; | |
1309 | while (i != 0) | |
1310 | tmp = scm_cons (data[--i], tmp); | |
1311 | scm_remember_upto_here_1 (form); | |
1312 | return scm_vector (iqq (tmp, env, depth)); | |
c96d76b8 | 1313 | } |
9fbee57e DH |
1314 | else |
1315 | return form; | |
1316 | } | |
1317 | ||
1318 | SCM | |
1319 | scm_m_quasiquote (SCM xorig, SCM env) | |
1320 | { | |
1321 | SCM x = SCM_CDR (xorig); | |
e90c3a89 | 1322 | SCM_ASSYNT (scm_ilength (x) == 1, s_expression, s_quasiquote); |
9fbee57e DH |
1323 | return iqq (SCM_CAR (x), env, 1); |
1324 | } | |
1325 | ||
1326 | ||
3b88ed2a | 1327 | SCM_SYNTAX (s_quote, "quote", scm_i_makbimacro, scm_m_quote); |
9fbee57e DH |
1328 | SCM_GLOBAL_SYMBOL (scm_sym_quote, s_quote); |
1329 | ||
1330 | SCM | |
1331 | scm_m_quote (SCM xorig, SCM env SCM_UNUSED) | |
1332 | { | |
e90c3a89 | 1333 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, s_expression, s_quote); |
9fbee57e DH |
1334 | return scm_cons (SCM_IM_QUOTE, SCM_CDR (xorig)); |
1335 | } | |
1336 | ||
1337 | ||
1338 | /* Will go into the RnRS module when Guile is factorized. | |
3b88ed2a | 1339 | SCM_SYNTAX (s_set_x, "set!", scm_i_makbimacro, scm_m_set_x); */ |
9fbee57e DH |
1340 | static const char s_set_x[] = "set!"; |
1341 | SCM_GLOBAL_SYMBOL (scm_sym_set_x, s_set_x); | |
1342 | ||
1343 | SCM | |
1344 | scm_m_set_x (SCM xorig, SCM env SCM_UNUSED) | |
1345 | { | |
1346 | SCM x = SCM_CDR (xorig); | |
e90c3a89 DH |
1347 | SCM_ASSYNT (scm_ilength (x) == 2, s_expression, s_set_x); |
1348 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (x)), s_variable, s_set_x); | |
9fbee57e DH |
1349 | return scm_cons (SCM_IM_SET_X, x); |
1350 | } | |
1351 | ||
1352 | ||
1353 | /* Start of the memoizers for non-R5RS builtin macros. */ | |
1354 | ||
1355 | ||
3b88ed2a | 1356 | SCM_SYNTAX (s_atapply, "@apply", scm_i_makbimacro, scm_m_apply); |
9fbee57e DH |
1357 | SCM_GLOBAL_SYMBOL (scm_sym_atapply, s_atapply); |
1358 | SCM_GLOBAL_SYMBOL (scm_sym_apply, s_atapply + 1); | |
1359 | ||
1360 | SCM | |
1361 | scm_m_apply (SCM xorig, SCM env SCM_UNUSED) | |
1362 | { | |
e90c3a89 | 1363 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 2, s_expression, s_atapply); |
9fbee57e | 1364 | return scm_cons (SCM_IM_APPLY, SCM_CDR (xorig)); |
73b64342 MD |
1365 | } |
1366 | ||
c96d76b8 | 1367 | |
2e171178 MV |
1368 | /* (@bind ((var exp) ...) body ...) |
1369 | ||
1370 | This will assign the values of the `exp's to the global variables | |
1371 | named by `var's (symbols, not evaluated), creating them if they | |
1372 | don't exist, executes body, and then restores the previous values of | |
1373 | the `var's. Additionally, whenever control leaves body, the values | |
1374 | of the `var's are saved and restored when control returns. It is an | |
1375 | error when a symbol appears more than once among the `var's. | |
1376 | All `exp's are evaluated before any `var' is set. | |
1377 | ||
c96d76b8 | 1378 | Think of this as `let' for dynamic scope. |
2e171178 MV |
1379 | |
1380 | It is memoized into (#@bind ((var ...) . (reversed-val ...)) body ...). | |
1381 | ||
1382 | XXX - also implement `@bind*'. | |
1383 | */ | |
1384 | ||
3b88ed2a | 1385 | SCM_SYNTAX (s_atbind, "@bind", scm_i_makbimacro, scm_m_atbind); |
73b64342 MD |
1386 | |
1387 | SCM | |
1388 | scm_m_atbind (SCM xorig, SCM env) | |
1389 | { | |
1390 | SCM x = SCM_CDR (xorig); | |
2e171178 | 1391 | SCM top_level = scm_env_top_level (env); |
311f6782 | 1392 | SCM vars = SCM_EOL, var; |
2e171178 MV |
1393 | SCM exps = SCM_EOL; |
1394 | ||
e90c3a89 | 1395 | SCM_ASSYNT (scm_ilength (x) > 1, s_expression, s_atbind); |
73b64342 | 1396 | |
73b64342 MD |
1397 | x = SCM_CAR (x); |
1398 | while (SCM_NIMP (x)) | |
1399 | { | |
2e171178 MV |
1400 | SCM rest; |
1401 | SCM sym_exp = SCM_CAR (x); | |
e90c3a89 DH |
1402 | SCM_ASSYNT (scm_ilength (sym_exp) == 2, s_bindings, s_atbind); |
1403 | SCM_ASSYNT (SCM_SYMBOLP (SCM_CAR (sym_exp)), s_bindings, s_atbind); | |
73b64342 | 1404 | x = SCM_CDR (x); |
2e171178 | 1405 | for (rest = x; SCM_NIMP (rest); rest = SCM_CDR (rest)) |
8ea46249 | 1406 | if (SCM_EQ_P (SCM_CAR (sym_exp), SCM_CAAR (rest))) |
e90c3a89 | 1407 | scm_misc_error (s_atbind, s_duplicate_bindings, SCM_EOL); |
311f6782 MV |
1408 | /* The first call to scm_sym2var will look beyond the current |
1409 | module, while the second call wont. */ | |
1410 | var = scm_sym2var (SCM_CAR (sym_exp), top_level, SCM_BOOL_F); | |
1411 | if (SCM_FALSEP (var)) | |
1412 | var = scm_sym2var (SCM_CAR (sym_exp), top_level, SCM_BOOL_T); | |
1413 | vars = scm_cons (var, vars); | |
2e171178 | 1414 | exps = scm_cons (SCM_CADR (sym_exp), exps); |
73b64342 | 1415 | } |
2e171178 MV |
1416 | return scm_cons (SCM_IM_BIND, |
1417 | scm_cons (scm_cons (scm_reverse_x (vars, SCM_EOL), exps), | |
1418 | SCM_CDDR (xorig))); | |
73b64342 | 1419 | } |
73b64342 | 1420 | |
b0c5d67b | 1421 | |
3b88ed2a | 1422 | SCM_SYNTAX(s_atcall_cc, "@call-with-current-continuation", scm_i_makbimacro, scm_m_cont); |
9fbee57e DH |
1423 | SCM_GLOBAL_SYMBOL(scm_sym_atcall_cc, s_atcall_cc); |
1424 | ||
1425 | ||
1426 | SCM | |
1427 | scm_m_cont (SCM xorig, SCM env SCM_UNUSED) | |
b0c5d67b | 1428 | { |
9fbee57e | 1429 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 1, |
e90c3a89 | 1430 | s_expression, s_atcall_cc); |
9fbee57e | 1431 | return scm_cons (SCM_IM_CONT, SCM_CDR (xorig)); |
b0c5d67b | 1432 | } |
b0c5d67b DH |
1433 | |
1434 | ||
3b88ed2a | 1435 | SCM_SYNTAX (s_at_call_with_values, "@call-with-values", scm_i_makbimacro, scm_m_at_call_with_values); |
9fbee57e | 1436 | SCM_GLOBAL_SYMBOL(scm_sym_at_call_with_values, s_at_call_with_values); |
b0c5d67b DH |
1437 | |
1438 | SCM | |
9fbee57e | 1439 | scm_m_at_call_with_values (SCM xorig, SCM env SCM_UNUSED) |
b0c5d67b | 1440 | { |
9fbee57e | 1441 | SCM_ASSYNT (scm_ilength (SCM_CDR (xorig)) == 2, |
e90c3a89 | 1442 | s_expression, s_at_call_with_values); |
9fbee57e | 1443 | return scm_cons (SCM_IM_CALL_WITH_VALUES, SCM_CDR (xorig)); |
b0c5d67b | 1444 | } |
b0c5d67b DH |
1445 | |
1446 | ||
3b88ed2a | 1447 | SCM_SYNTAX (s_future, "future", scm_i_makbimacro, scm_m_future); |
9fbee57e | 1448 | SCM_GLOBAL_SYMBOL (scm_sym_future, s_future); |
a513ead3 | 1449 | |
9fbee57e DH |
1450 | /* Like promises, futures are implemented as closures with an empty |
1451 | * parameter list. Thus, (future <expression>) is transformed into | |
1452 | * (#@future '() <expression>), where the empty list represents the | |
1453 | * empty parameter list. This representation allows for easy creation | |
1454 | * of the closure during evaluation. */ | |
a513ead3 | 1455 | SCM |
8ae95199 | 1456 | scm_m_future (SCM expr, SCM env) |
a513ead3 | 1457 | { |
8ae95199 DH |
1458 | const SCM new_expr = memoize_as_thunk_prototype (expr, env); |
1459 | SCM_SETCAR (new_expr, SCM_IM_FUTURE); | |
1460 | return new_expr; | |
a513ead3 MV |
1461 | } |
1462 | ||
9fbee57e | 1463 | |
3b88ed2a | 1464 | SCM_SYNTAX (s_gset_x, "set!", scm_i_makbimacro, scm_m_generalized_set_x); |
9fbee57e DH |
1465 | SCM_SYMBOL (scm_sym_setter, "setter"); |
1466 | ||
1467 | SCM | |
1468 | scm_m_generalized_set_x (SCM xorig, SCM env SCM_UNUSED) | |
1469 | { | |
1470 | SCM x = SCM_CDR (xorig); | |
e90c3a89 | 1471 | SCM_ASSYNT (2 == scm_ilength (x), s_expression, s_set_x); |
9fbee57e DH |
1472 | if (SCM_SYMBOLP (SCM_CAR (x))) |
1473 | return scm_cons (SCM_IM_SET_X, x); | |
1474 | else if (SCM_CONSP (SCM_CAR (x))) | |
1475 | return scm_cons (scm_list_2 (scm_sym_setter, SCM_CAAR (x)), | |
1476 | scm_append (scm_list_2 (SCM_CDAR (x), SCM_CDR (x)))); | |
1477 | else | |
e90c3a89 | 1478 | scm_misc_error (s_set_x, s_variable, SCM_EOL); |
9fbee57e DH |
1479 | } |
1480 | ||
1481 | ||
a4aa2134 | 1482 | static const char* s_atslot_ref = "@slot-ref"; |
9fbee57e | 1483 | |
a4aa2134 DH |
1484 | /* @slot-ref is bound privately in the (oop goops) module from goops.c. As |
1485 | * soon as the module system allows us to more freely create bindings in | |
1486 | * arbitrary modules during the startup phase, the code from goops.c should be | |
1487 | * moved here. */ | |
9fbee57e DH |
1488 | SCM |
1489 | scm_m_atslot_ref (SCM xorig, SCM env SCM_UNUSED) | |
1490 | #define FUNC_NAME s_atslot_ref | |
1491 | { | |
1492 | SCM x = SCM_CDR (xorig); | |
e90c3a89 | 1493 | SCM_ASSYNT (scm_ilength (x) == 2, s_expression, FUNC_NAME); |
9fbee57e DH |
1494 | SCM_VALIDATE_INUM (SCM_ARG2, SCM_CADR (x)); |
1495 | return scm_cons (SCM_IM_SLOT_REF, x); | |
1496 | } | |
1497 | #undef FUNC_NAME | |
1498 | ||
1499 | ||
a4aa2134 | 1500 | static const char* s_atslot_set_x = "@slot-set!"; |
9fbee57e | 1501 | |
a4aa2134 DH |
1502 | /* @slot-set! is bound privately in the (oop goops) module from goops.c. As |
1503 | * soon as the module system allows us to more freely create bindings in | |
1504 | * arbitrary modules during the startup phase, the code from goops.c should be | |
1505 | * moved here. */ | |
9fbee57e DH |
1506 | SCM |
1507 | scm_m_atslot_set_x (SCM xorig, SCM env SCM_UNUSED) | |
1508 | #define FUNC_NAME s_atslot_set_x | |
1509 | { | |
1510 | SCM x = SCM_CDR (xorig); | |
e90c3a89 | 1511 | SCM_ASSYNT (scm_ilength (x) == 3, s_expression, FUNC_NAME); |
9fbee57e DH |
1512 | SCM_VALIDATE_INUM (SCM_ARG2, SCM_CADR (x)); |
1513 | return scm_cons (SCM_IM_SLOT_SET_X, x); | |
1514 | } | |
1515 | #undef FUNC_NAME | |
1516 | ||
1517 | ||
1518 | #if SCM_ENABLE_ELISP | |
1519 | ||
3b88ed2a | 1520 | SCM_SYNTAX (s_nil_cond, "nil-cond", scm_i_makbimacro, scm_m_nil_cond); |
9fbee57e DH |
1521 | |
1522 | SCM | |
1523 | scm_m_nil_cond (SCM xorig, SCM env SCM_UNUSED) | |
1524 | { | |
1525 | long len = scm_ilength (SCM_CDR (xorig)); | |
e90c3a89 | 1526 | SCM_ASSYNT (len >= 1 && (len & 1) == 1, s_expression, "nil-cond"); |
9fbee57e DH |
1527 | return scm_cons (SCM_IM_NIL_COND, SCM_CDR (xorig)); |
1528 | } | |
1529 | ||
1530 | ||
3b88ed2a | 1531 | SCM_SYNTAX (s_atfop, "@fop", scm_i_makbimacro, scm_m_atfop); |
9fbee57e DH |
1532 | |
1533 | SCM | |
1534 | scm_m_atfop (SCM xorig, SCM env SCM_UNUSED) | |
1535 | { | |
1536 | SCM x = SCM_CDR (xorig), var; | |
e90c3a89 | 1537 | SCM_ASSYNT (scm_ilength (x) >= 1, s_expression, "@fop"); |
9fbee57e DH |
1538 | var = scm_symbol_fref (SCM_CAR (x)); |
1539 | /* Passing the symbol name as the `subr' arg here isn't really | |
1540 | right, but without it it can be very difficult to work out from | |
1541 | the error message which function definition was missing. In any | |
1542 | case, we shouldn't really use SCM_ASSYNT here at all, but instead | |
1543 | something equivalent to (signal void-function (list SYM)) in | |
1544 | Elisp. */ | |
1545 | SCM_ASSYNT (SCM_VARIABLEP (var), | |
1546 | "Symbol's function definition is void", | |
1547 | SCM_SYMBOL_CHARS (SCM_CAR (x))); | |
1548 | /* Support `defalias'. */ | |
1549 | while (SCM_SYMBOLP (SCM_VARIABLE_REF (var))) | |
1550 | { | |
1551 | var = scm_symbol_fref (SCM_VARIABLE_REF (var)); | |
1552 | SCM_ASSYNT (SCM_VARIABLEP (var), | |
1553 | "Symbol's function definition is void", | |
1554 | SCM_SYMBOL_CHARS (SCM_CAR (x))); | |
1555 | } | |
1556 | /* Use `var' here rather than `SCM_VARIABLE_REF (var)' because the | |
1557 | former allows for automatically picking up redefinitions of the | |
1558 | corresponding symbol. */ | |
1559 | SCM_SETCAR (x, var); | |
1560 | /* If the variable contains a procedure, leave the | |
1561 | `transformer-macro' in place so that the procedure's arguments | |
1562 | get properly transformed, and change the initial @fop to | |
1563 | SCM_IM_APPLY. */ | |
1564 | if (!SCM_MACROP (SCM_VARIABLE_REF (var))) | |
1565 | { | |
1566 | SCM_SETCAR (xorig, SCM_IM_APPLY); | |
1567 | return xorig; | |
1568 | } | |
1569 | /* Otherwise (the variable contains a macro), the arguments should | |
1570 | not be transformed, so cut the `transformer-macro' out and return | |
1571 | the resulting expression starting with the variable. */ | |
1572 | SCM_SETCDR (x, SCM_CDADR (x)); | |
1573 | return x; | |
1574 | } | |
1575 | ||
1576 | #endif /* SCM_ENABLE_ELISP */ | |
1577 | ||
1578 | ||
f58c472a DH |
1579 | /* Start of the memoizers for deprecated macros. */ |
1580 | ||
1581 | ||
1582 | #if (SCM_ENABLE_DEPRECATED == 1) | |
1583 | ||
1584 | SCM_SYNTAX (s_undefine, "undefine", scm_makacro, scm_m_undefine); | |
1585 | ||
1586 | SCM | |
1587 | scm_m_undefine (SCM x, SCM env) | |
1588 | { | |
1589 | SCM arg1 = x; | |
1590 | x = SCM_CDR (x); | |
1591 | SCM_ASSYNT (SCM_TOP_LEVEL (env), "bad placement ", s_undefine); | |
1592 | SCM_ASSYNT (SCM_CONSP (x) && SCM_NULLP (SCM_CDR (x)), | |
e90c3a89 | 1593 | s_expression, s_undefine); |
f58c472a | 1594 | x = SCM_CAR (x); |
e90c3a89 | 1595 | SCM_ASSYNT (SCM_SYMBOLP (x), s_variable, s_undefine); |
f58c472a DH |
1596 | arg1 = scm_sym2var (x, scm_env_top_level (env), SCM_BOOL_F); |
1597 | SCM_ASSYNT (!SCM_FALSEP (arg1) && !SCM_UNBNDP (SCM_VARIABLE_REF (arg1)), | |
1598 | "variable already unbound ", s_undefine); | |
1599 | SCM_VARIABLE_SET (arg1, SCM_UNDEFINED); | |
1600 | #ifdef SICP | |
1601 | return x; | |
1602 | #else | |
1603 | return SCM_UNSPECIFIED; | |
1604 | #endif | |
1605 | } | |
1606 | ||
1607 | #endif | |
1608 | ||
1609 | ||
26d5b9b4 MD |
1610 | SCM |
1611 | scm_m_expand_body (SCM xorig, SCM env) | |
1612 | { | |
22a52da1 | 1613 | SCM x = SCM_CDR (xorig), defs = SCM_EOL; |
26d5b9b4 MD |
1614 | char *what = SCM_ISYMCHARS (SCM_CAR (xorig)) + 2; |
1615 | ||
1616 | while (SCM_NIMP (x)) | |
1617 | { | |
22a52da1 DH |
1618 | SCM form = SCM_CAR (x); |
1619 | if (!SCM_CONSP (form)) | |
26d5b9b4 MD |
1620 | break; |
1621 | if (!SCM_SYMBOLP (SCM_CAR (form))) | |
1622 | break; | |
22a52da1 | 1623 | |
3a3111a8 MD |
1624 | form = scm_macroexp (scm_cons_source (form, |
1625 | SCM_CAR (form), | |
1626 | SCM_CDR (form)), | |
1627 | env); | |
26d5b9b4 | 1628 | |
cf498326 | 1629 | if (SCM_EQ_P (SCM_IM_DEFINE, SCM_CAR (form))) |
26d5b9b4 MD |
1630 | { |
1631 | defs = scm_cons (SCM_CDR (form), defs); | |
22a52da1 | 1632 | x = SCM_CDR (x); |
26d5b9b4 | 1633 | } |
22a52da1 | 1634 | else if (!SCM_IMP (defs)) |
26d5b9b4 MD |
1635 | { |
1636 | break; | |
1637 | } | |
cf498326 | 1638 | else if (SCM_EQ_P (SCM_IM_BEGIN, SCM_CAR (form))) |
26d5b9b4 | 1639 | { |
8ea46249 | 1640 | x = scm_append (scm_list_2 (SCM_CDR (form), SCM_CDR (x))); |
26d5b9b4 MD |
1641 | } |
1642 | else | |
1643 | { | |
22a52da1 | 1644 | x = scm_cons (form, SCM_CDR (x)); |
26d5b9b4 MD |
1645 | break; |
1646 | } | |
1647 | } | |
1648 | ||
302c12b4 | 1649 | if (!SCM_NULLP (defs)) |
26d5b9b4 | 1650 | { |
302c12b4 DH |
1651 | SCM rvars, inits, body, letrec; |
1652 | transform_bindings (defs, &rvars, &inits, what); | |
1653 | body = scm_m_body (SCM_IM_DEFINE, x, what); | |
1654 | letrec = scm_cons2 (SCM_IM_LETREC, rvars, scm_cons (inits, body)); | |
1655 | SCM_SETCAR (xorig, letrec); | |
1656 | SCM_SETCDR (xorig, SCM_EOL); | |
1657 | } | |
1658 | else | |
1659 | { | |
e90c3a89 | 1660 | SCM_ASSYNT (SCM_CONSP (x), s_body, what); |
302c12b4 DH |
1661 | SCM_SETCAR (xorig, SCM_CAR (x)); |
1662 | SCM_SETCDR (xorig, SCM_CDR (x)); | |
26d5b9b4 | 1663 | } |
26d5b9b4 MD |
1664 | |
1665 | return xorig; | |
1666 | } | |
1667 | ||
1668 | SCM | |
1669 | scm_macroexp (SCM x, SCM env) | |
1670 | { | |
86d31dfe | 1671 | SCM res, proc, orig_sym; |
26d5b9b4 MD |
1672 | |
1673 | /* Don't bother to produce error messages here. We get them when we | |
1674 | eventually execute the code for real. */ | |
1675 | ||
1676 | macro_tail: | |
86d31dfe MV |
1677 | orig_sym = SCM_CAR (x); |
1678 | if (!SCM_SYMBOLP (orig_sym)) | |
26d5b9b4 MD |
1679 | return x; |
1680 | ||
26d5b9b4 MD |
1681 | { |
1682 | SCM *proc_ptr = scm_lookupcar1 (x, env, 0); | |
1683 | if (proc_ptr == NULL) | |
1684 | { | |
1685 | /* We have lost the race. */ | |
1686 | goto macro_tail; | |
1687 | } | |
1688 | proc = *proc_ptr; | |
1689 | } | |
26d5b9b4 MD |
1690 | |
1691 | /* Only handle memoizing macros. `Acros' and `macros' are really | |
1692 | special forms and should not be evaluated here. */ | |
1693 | ||
3b88ed2a DH |
1694 | if (!SCM_MACROP (proc) |
1695 | || (SCM_MACRO_TYPE (proc) != 2 && !SCM_BUILTIN_MACRO_P (proc))) | |
26d5b9b4 MD |
1696 | return x; |
1697 | ||
86d31dfe | 1698 | SCM_SETCAR (x, orig_sym); /* Undo memoizing effect of lookupcar */ |
fdc28395 | 1699 | res = scm_call_2 (SCM_MACRO_CODE (proc), x, env); |
26d5b9b4 MD |
1700 | |
1701 | if (scm_ilength (res) <= 0) | |
8ea46249 | 1702 | res = scm_list_2 (SCM_IM_BEGIN, res); |
26d5b9b4 | 1703 | |
26d5b9b4 MD |
1704 | SCM_DEFER_INTS; |
1705 | SCM_SETCAR (x, SCM_CAR (res)); | |
1706 | SCM_SETCDR (x, SCM_CDR (res)); | |
1707 | SCM_ALLOW_INTS; | |
1708 | ||
1709 | goto macro_tail; | |
1710 | } | |
73b64342 | 1711 | |
a44a9715 DH |
1712 | #define SCM_BIT7(x) (127 & SCM_UNPACK (x)) |
1713 | ||
1714 | /* A function object to implement "apply" for non-closure functions. */ | |
1715 | static SCM f_apply; | |
1716 | /* An endless list consisting of #<undefined> objects: */ | |
1717 | static SCM undefineds; | |
1718 | ||
6dbd0af5 MD |
1719 | /* scm_unmemocopy takes a memoized expression together with its |
1720 | * environment and rewrites it to its original form. Thus, it is the | |
1721 | * inversion of the rewrite rules above. The procedure is not | |
1722 | * optimized for speed. It's used in scm_iprin1 when printing the | |
220ff1eb MD |
1723 | * code of a closure, in scm_procedure_source, in display_frame when |
1724 | * generating the source for a stackframe in a backtrace, and in | |
1725 | * display_expression. | |
86d31dfe | 1726 | * |
c96d76b8 | 1727 | * Unmemoizing is not a reliable process. You cannot in general |
86d31dfe MV |
1728 | * expect to get the original source back. |
1729 | * | |
1730 | * However, GOOPS currently relies on this for method compilation. | |
1731 | * This ought to change. | |
26d5b9b4 MD |
1732 | */ |
1733 | ||
8ea46249 DH |
1734 | static SCM |
1735 | build_binding_list (SCM names, SCM inits) | |
1736 | { | |
1737 | SCM bindings = SCM_EOL; | |
1738 | while (!SCM_NULLP (names)) | |
1739 | { | |
1740 | SCM binding = scm_list_2 (SCM_CAR (names), SCM_CAR (inits)); | |
1741 | bindings = scm_cons (binding, bindings); | |
1742 | names = SCM_CDR (names); | |
1743 | inits = SCM_CDR (inits); | |
1744 | } | |
1745 | return bindings; | |
1746 | } | |
1747 | ||
6dbd0af5 | 1748 | static SCM |
1bbd0b84 | 1749 | unmemocopy (SCM x, SCM env) |
6dbd0af5 MD |
1750 | { |
1751 | SCM ls, z; | |
6dbd0af5 | 1752 | SCM p; |
8c494e99 | 1753 | if (!SCM_CONSP (x)) |
6dbd0af5 | 1754 | return x; |
6dbd0af5 | 1755 | p = scm_whash_lookup (scm_source_whash, x); |
8ea46249 | 1756 | switch (SCM_ITAG7 (SCM_CAR (x))) |
6dbd0af5 | 1757 | { |
1b43d24c | 1758 | case SCM_BIT7 (SCM_IM_AND): |
2f0d1375 | 1759 | ls = z = scm_cons (scm_sym_and, SCM_UNSPECIFIED); |
6dbd0af5 | 1760 | break; |
1b43d24c | 1761 | case SCM_BIT7 (SCM_IM_BEGIN): |
2f0d1375 | 1762 | ls = z = scm_cons (scm_sym_begin, SCM_UNSPECIFIED); |
6dbd0af5 | 1763 | break; |
1b43d24c | 1764 | case SCM_BIT7 (SCM_IM_CASE): |
2f0d1375 | 1765 | ls = z = scm_cons (scm_sym_case, SCM_UNSPECIFIED); |
6dbd0af5 | 1766 | break; |
1b43d24c | 1767 | case SCM_BIT7 (SCM_IM_COND): |
2f0d1375 | 1768 | ls = z = scm_cons (scm_sym_cond, SCM_UNSPECIFIED); |
6dbd0af5 | 1769 | break; |
1b43d24c | 1770 | case SCM_BIT7 (SCM_IM_DO): |
6dbd0af5 | 1771 | { |
e681d187 DH |
1772 | /* format: (#@do (i1 ... ik) (nk nk-1 ...) (test) (body) s1 ... sk), |
1773 | * where ix is an initializer for a local variable, nx is the name of | |
8ea46249 DH |
1774 | * the local variable, test is the test clause of the do loop, body is |
1775 | * the body of the do loop and sx are the step clauses for the local | |
1776 | * variables. */ | |
1777 | SCM names, inits, test, memoized_body, steps, bindings; | |
1778 | ||
6dbd0af5 | 1779 | x = SCM_CDR (x); |
8ea46249 | 1780 | inits = scm_reverse (unmemocopy (SCM_CAR (x), env)); |
e681d187 DH |
1781 | x = SCM_CDR (x); |
1782 | names = SCM_CAR (x); | |
821f18a4 | 1783 | env = SCM_EXTEND_ENV (names, SCM_EOL, env); |
6dbd0af5 | 1784 | x = SCM_CDR (x); |
8ea46249 DH |
1785 | test = unmemocopy (SCM_CAR (x), env); |
1786 | x = SCM_CDR (x); | |
1787 | memoized_body = SCM_CAR (x); | |
1788 | x = SCM_CDR (x); | |
1789 | steps = scm_reverse (unmemocopy (x, env)); | |
1790 | ||
26d5b9b4 | 1791 | /* build transformed binding list */ |
8ea46249 DH |
1792 | bindings = SCM_EOL; |
1793 | while (!SCM_NULLP (names)) | |
6dbd0af5 | 1794 | { |
8ea46249 DH |
1795 | SCM name = SCM_CAR (names); |
1796 | SCM init = SCM_CAR (inits); | |
1797 | SCM step = SCM_CAR (steps); | |
1798 | step = SCM_EQ_P (step, name) ? SCM_EOL : scm_list_1 (step); | |
1799 | ||
1800 | bindings = scm_cons (scm_cons2 (name, init, step), bindings); | |
1801 | ||
1802 | names = SCM_CDR (names); | |
1803 | inits = SCM_CDR (inits); | |
1804 | steps = SCM_CDR (steps); | |
6dbd0af5 | 1805 | } |
8ea46249 DH |
1806 | z = scm_cons (test, SCM_UNSPECIFIED); |
1807 | ls = scm_cons2 (scm_sym_do, bindings, z); | |
1808 | ||
1809 | x = scm_cons (SCM_BOOL_F, memoized_body); | |
1810 | break; | |
1811 | } | |
1b43d24c | 1812 | case SCM_BIT7 (SCM_IM_IF): |
8ea46249 DH |
1813 | ls = z = scm_cons (scm_sym_if, SCM_UNSPECIFIED); |
1814 | break; | |
1b43d24c | 1815 | case SCM_BIT7 (SCM_IM_LET): |
8ea46249 DH |
1816 | { |
1817 | /* format: (#@let (nk nk-1 ...) (i1 ... ik) b1 ...), | |
1818 | * where nx is the name of a local variable, ix is an initializer for | |
1819 | * the local variable and by are the body clauses. */ | |
1820 | SCM names, inits, bindings; | |
1821 | ||
1822 | x = SCM_CDR (x); | |
1823 | names = SCM_CAR (x); | |
1824 | x = SCM_CDR (x); | |
1825 | inits = scm_reverse (unmemocopy (SCM_CAR (x), env)); | |
821f18a4 | 1826 | env = SCM_EXTEND_ENV (names, SCM_EOL, env); |
8ea46249 DH |
1827 | |
1828 | bindings = build_binding_list (names, inits); | |
1829 | z = scm_cons (bindings, SCM_UNSPECIFIED); | |
1830 | ls = scm_cons (scm_sym_let, z); | |
1831 | break; | |
1832 | } | |
1b43d24c | 1833 | case SCM_BIT7 (SCM_IM_LETREC): |
8ea46249 DH |
1834 | { |
1835 | /* format: (#@letrec (nk nk-1 ...) (i1 ... ik) b1 ...), | |
1836 | * where nx is the name of a local variable, ix is an initializer for | |
1837 | * the local variable and by are the body clauses. */ | |
1838 | SCM names, inits, bindings; | |
1839 | ||
1840 | x = SCM_CDR (x); | |
1841 | names = SCM_CAR (x); | |
821f18a4 | 1842 | env = SCM_EXTEND_ENV (names, SCM_EOL, env); |
8ea46249 DH |
1843 | x = SCM_CDR (x); |
1844 | inits = scm_reverse (unmemocopy (SCM_CAR (x), env)); | |
1845 | ||
1846 | bindings = build_binding_list (names, inits); | |
1847 | z = scm_cons (bindings, SCM_UNSPECIFIED); | |
1848 | ls = scm_cons (scm_sym_letrec, z); | |
6dbd0af5 MD |
1849 | break; |
1850 | } | |
1b43d24c | 1851 | case SCM_BIT7 (SCM_IM_LETSTAR): |
6dbd0af5 MD |
1852 | { |
1853 | SCM b, y; | |
1854 | x = SCM_CDR (x); | |
1855 | b = SCM_CAR (x); | |
1856 | y = SCM_EOL; | |
1857 | if SCM_IMP (b) | |
1858 | { | |
821f18a4 | 1859 | env = SCM_EXTEND_ENV (SCM_EOL, SCM_EOL, env); |
6dbd0af5 MD |
1860 | goto letstar; |
1861 | } | |
1862 | y = z = scm_acons (SCM_CAR (b), | |
1863 | unmemocar ( | |
8ea46249 | 1864 | scm_cons (unmemocopy (SCM_CADR (b), env), SCM_EOL), env), |
6dbd0af5 | 1865 | SCM_UNSPECIFIED); |
821f18a4 | 1866 | env = SCM_EXTEND_ENV (SCM_CAR (b), SCM_BOOL_F, env); |
8ea46249 | 1867 | b = SCM_CDDR (b); |
6dbd0af5 MD |
1868 | if (SCM_IMP (b)) |
1869 | { | |
1870 | SCM_SETCDR (y, SCM_EOL); | |
05b15362 DH |
1871 | z = scm_cons (y, SCM_UNSPECIFIED); |
1872 | ls = scm_cons (scm_sym_let, z); | |
6dbd0af5 MD |
1873 | break; |
1874 | } | |
1875 | do | |
1876 | { | |
a23afe53 MD |
1877 | SCM_SETCDR (z, scm_acons (SCM_CAR (b), |
1878 | unmemocar ( | |
8ea46249 | 1879 | scm_list_1 (unmemocopy (SCM_CADR (b), env)), env), |
a23afe53 MD |
1880 | SCM_UNSPECIFIED)); |
1881 | z = SCM_CDR (z); | |
821f18a4 | 1882 | env = SCM_EXTEND_ENV (SCM_CAR (b), SCM_BOOL_F, env); |
8ea46249 | 1883 | b = SCM_CDDR (b); |
6dbd0af5 | 1884 | } |
ff467021 | 1885 | while (SCM_NIMP (b)); |
a23afe53 | 1886 | SCM_SETCDR (z, SCM_EOL); |
6dbd0af5 | 1887 | letstar: |
05b15362 DH |
1888 | z = scm_cons (y, SCM_UNSPECIFIED); |
1889 | ls = scm_cons (scm_sym_letstar, z); | |
6dbd0af5 MD |
1890 | break; |
1891 | } | |
1b43d24c | 1892 | case SCM_BIT7 (SCM_IM_OR): |
2f0d1375 | 1893 | ls = z = scm_cons (scm_sym_or, SCM_UNSPECIFIED); |
6dbd0af5 | 1894 | break; |
1b43d24c | 1895 | case SCM_BIT7 (SCM_IM_LAMBDA): |
6dbd0af5 | 1896 | x = SCM_CDR (x); |
8ea46249 DH |
1897 | z = scm_cons (SCM_CAR (x), SCM_UNSPECIFIED); |
1898 | ls = scm_cons (scm_sym_lambda, z); | |
821f18a4 | 1899 | env = SCM_EXTEND_ENV (SCM_CAR (x), SCM_EOL, env); |
6dbd0af5 | 1900 | break; |
1b43d24c | 1901 | case SCM_BIT7 (SCM_IM_QUOTE): |
2f0d1375 | 1902 | ls = z = scm_cons (scm_sym_quote, SCM_UNSPECIFIED); |
6dbd0af5 | 1903 | break; |
1b43d24c | 1904 | case SCM_BIT7 (SCM_IM_SET_X): |
89efbff4 | 1905 | ls = z = scm_cons (scm_sym_set_x, SCM_UNSPECIFIED); |
6dbd0af5 | 1906 | break; |
1b43d24c | 1907 | case SCM_BIT7 (SCM_MAKISYM (0)): |
6dbd0af5 | 1908 | z = SCM_CAR (x); |
ff467021 | 1909 | switch (SCM_ISYMNUM (z)) |
6dbd0af5 | 1910 | { |
22f2cf2d DH |
1911 | case (SCM_ISYMNUM (SCM_IM_DEFINE)): |
1912 | { | |
1913 | SCM n; | |
1914 | x = SCM_CDR (x); | |
1915 | n = SCM_CAR (x); | |
1916 | z = scm_cons (n, SCM_UNSPECIFIED); | |
1917 | ls = scm_cons (scm_sym_define, z); | |
1918 | if (!SCM_NULLP (env)) | |
1919 | env = scm_cons (scm_cons (scm_cons (n, SCM_CAAR (env)), | |
1920 | SCM_CDAR (env)), | |
1921 | SCM_CDR (env)); | |
1922 | break; | |
1923 | } | |
6dbd0af5 | 1924 | case (SCM_ISYMNUM (SCM_IM_APPLY)): |
2f0d1375 | 1925 | ls = z = scm_cons (scm_sym_atapply, SCM_UNSPECIFIED); |
6dbd0af5 MD |
1926 | goto loop; |
1927 | case (SCM_ISYMNUM (SCM_IM_CONT)): | |
2f0d1375 | 1928 | ls = z = scm_cons (scm_sym_atcall_cc, SCM_UNSPECIFIED); |
6dbd0af5 | 1929 | goto loop; |
a570e93a MD |
1930 | case (SCM_ISYMNUM (SCM_IM_DELAY)): |
1931 | ls = z = scm_cons (scm_sym_delay, SCM_UNSPECIFIED); | |
1932 | x = SCM_CDR (x); | |
1933 | goto loop; | |
28d52ebb | 1934 | case (SCM_ISYMNUM (SCM_IM_FUTURE)): |
ebf9b47c | 1935 | ls = z = scm_cons (scm_sym_future, SCM_UNSPECIFIED); |
28d52ebb MD |
1936 | x = SCM_CDR (x); |
1937 | goto loop; | |
a513ead3 MV |
1938 | case (SCM_ISYMNUM (SCM_IM_CALL_WITH_VALUES)): |
1939 | ls = z = scm_cons (scm_sym_at_call_with_values, SCM_UNSPECIFIED); | |
1940 | goto loop; | |
2a6f7afe DH |
1941 | case (SCM_ISYMNUM (SCM_IM_ELSE)): |
1942 | ls = z = scm_cons (scm_sym_else, SCM_UNSPECIFIED); | |
1943 | goto loop; | |
6dbd0af5 | 1944 | default: |
fa888178 | 1945 | /* appease the Sun compiler god: */ ; |
6dbd0af5 | 1946 | } |
6dbd0af5 MD |
1947 | default: |
1948 | ls = z = unmemocar (scm_cons (unmemocopy (SCM_CAR (x), env), | |
1949 | SCM_UNSPECIFIED), | |
1950 | env); | |
1951 | } | |
1952 | loop: | |
8c494e99 DH |
1953 | x = SCM_CDR (x); |
1954 | while (SCM_CONSP (x)) | |
a23afe53 | 1955 | { |
8c494e99 DH |
1956 | SCM form = SCM_CAR (x); |
1957 | if (!SCM_ISYMP (form)) | |
1958 | { | |
1959 | SCM copy = scm_cons (unmemocopy (form, env), SCM_UNSPECIFIED); | |
1960 | SCM_SETCDR (z, unmemocar (copy, env)); | |
1961 | z = SCM_CDR (z); | |
1962 | } | |
609a8b86 DH |
1963 | else if (SCM_EQ_P (form, SCM_IM_ARROW)) |
1964 | { | |
1965 | SCM_SETCDR (z, scm_cons (scm_sym_arrow, SCM_UNSPECIFIED)); | |
1966 | z = SCM_CDR (z); | |
1967 | } | |
8c494e99 | 1968 | x = SCM_CDR (x); |
a23afe53 MD |
1969 | } |
1970 | SCM_SETCDR (z, x); | |
01f11e02 | 1971 | if (!SCM_FALSEP (p)) |
6dbd0af5 | 1972 | scm_whash_insert (scm_source_whash, ls, p); |
6dbd0af5 MD |
1973 | return ls; |
1974 | } | |
1975 | ||
1cc91f1b | 1976 | |
6dbd0af5 | 1977 | SCM |
6e8d25a6 | 1978 | scm_unmemocopy (SCM x, SCM env) |
6dbd0af5 | 1979 | { |
01f11e02 | 1980 | if (!SCM_NULLP (env)) |
6dbd0af5 MD |
1981 | /* Make a copy of the lowest frame to protect it from |
1982 | modifications by SCM_IM_DEFINE */ | |
1983 | return unmemocopy (x, scm_cons (SCM_CAR (env), SCM_CDR (env))); | |
1984 | else | |
1985 | return unmemocopy (x, env); | |
1986 | } | |
1987 | ||
1cc91f1b | 1988 | |
0f2d19dd | 1989 | int |
6e8d25a6 | 1990 | scm_badargsp (SCM formals, SCM args) |
0f2d19dd | 1991 | { |
6a0f6ff3 | 1992 | while (!SCM_NULLP (formals)) |
0f2d19dd | 1993 | { |
01f11e02 | 1994 | if (!SCM_CONSP (formals)) |
ff467021 | 1995 | return 0; |
6a0f6ff3 | 1996 | if (SCM_NULLP (args)) |
ff467021 | 1997 | return 1; |
0f2d19dd JB |
1998 | formals = SCM_CDR (formals); |
1999 | args = SCM_CDR (args); | |
2000 | } | |
01f11e02 | 2001 | return !SCM_NULLP (args) ? 1 : 0; |
0f2d19dd | 2002 | } |
a392ee15 | 2003 | |
0f2d19dd | 2004 | \f |
6dbd0af5 | 2005 | SCM |
6e8d25a6 | 2006 | scm_eval_args (SCM l, SCM env, SCM proc) |
6dbd0af5 | 2007 | { |
680ed4a8 | 2008 | SCM results = SCM_EOL, *lloc = &results, res; |
904a077d | 2009 | while (SCM_CONSP (l)) |
6dbd0af5 | 2010 | { |
680ed4a8 | 2011 | res = EVALCAR (l, env); |
904a077d | 2012 | |
8ea46249 | 2013 | *lloc = scm_list_1 (res); |
a23afe53 | 2014 | lloc = SCM_CDRLOC (*lloc); |
6dbd0af5 MD |
2015 | l = SCM_CDR (l); |
2016 | } | |
22a52da1 | 2017 | if (!SCM_NULLP (l)) |
904a077d | 2018 | scm_wrong_num_args (proc); |
680ed4a8 | 2019 | return results; |
6dbd0af5 | 2020 | } |
c4ac4d88 | 2021 | |
d0b07b5d | 2022 | |
9de33deb MD |
2023 | SCM |
2024 | scm_eval_body (SCM code, SCM env) | |
2025 | { | |
2026 | SCM next; | |
2027 | again: | |
01f11e02 DH |
2028 | next = SCM_CDR (code); |
2029 | while (!SCM_NULLP (next)) | |
9de33deb MD |
2030 | { |
2031 | if (SCM_IMP (SCM_CAR (code))) | |
2032 | { | |
2033 | if (SCM_ISYMP (SCM_CAR (code))) | |
2034 | { | |
28d52ebb | 2035 | scm_rec_mutex_lock (&source_mutex); |
9bc4701c MD |
2036 | /* check for race condition */ |
2037 | if (SCM_ISYMP (SCM_CAR (code))) | |
2038 | code = scm_m_expand_body (code, env); | |
28d52ebb | 2039 | scm_rec_mutex_unlock (&source_mutex); |
9de33deb MD |
2040 | goto again; |
2041 | } | |
2042 | } | |
2043 | else | |
2044 | SCM_XEVAL (SCM_CAR (code), env); | |
2045 | code = next; | |
01f11e02 | 2046 | next = SCM_CDR (code); |
9de33deb MD |
2047 | } |
2048 | return SCM_XEVALCAR (code, env); | |
2049 | } | |
2050 | ||
0f2d19dd JB |
2051 | #endif /* !DEVAL */ |
2052 | ||
6dbd0af5 MD |
2053 | |
2054 | /* SECTION: This code is specific for the debugging support. One | |
2055 | * branch is read when DEVAL isn't defined, the other when DEVAL is | |
2056 | * defined. | |
2057 | */ | |
2058 | ||
2059 | #ifndef DEVAL | |
2060 | ||
2061 | #define SCM_APPLY scm_apply | |
2062 | #define PREP_APPLY(proc, args) | |
2063 | #define ENTER_APPLY | |
ddea3325 | 2064 | #define RETURN(x) do { return x; } while (0) |
b7ff98dd MD |
2065 | #ifdef STACK_CHECKING |
2066 | #ifndef NO_CEVAL_STACK_CHECKING | |
2067 | #define EVAL_STACK_CHECKING | |
2068 | #endif | |
6dbd0af5 MD |
2069 | #endif |
2070 | ||
2071 | #else /* !DEVAL */ | |
2072 | ||
0f2d19dd JB |
2073 | #undef SCM_CEVAL |
2074 | #define SCM_CEVAL scm_deval /* Substitute all uses of scm_ceval */ | |
2075 | #undef SCM_APPLY | |
2076 | #define SCM_APPLY scm_dapply | |
6dbd0af5 MD |
2077 | #undef PREP_APPLY |
2078 | #define PREP_APPLY(p, l) \ | |
2079 | { ++debug.info; debug.info->a.proc = p; debug.info->a.args = l; } | |
2080 | #undef ENTER_APPLY | |
2081 | #define ENTER_APPLY \ | |
d3a6bc94 | 2082 | do { \ |
b7ff98dd | 2083 | SCM_SET_ARGSREADY (debug);\ |
5132eef0 | 2084 | if (scm_check_apply_p && SCM_TRAPS_P)\ |
b7ff98dd | 2085 | if (SCM_APPLY_FRAME_P || (SCM_TRACE_P && PROCTRACEP (proc)))\ |
6dbd0af5 | 2086 | {\ |
156dcb09 | 2087 | SCM tmp, tail = SCM_BOOL(SCM_TRACED_FRAME_P (debug)); \ |
c6a4fbce | 2088 | SCM_SET_TRACED_FRAME (debug); \ |
d95c0b76 | 2089 | SCM_TRAPS_P = 0;\ |
b7ff98dd | 2090 | if (SCM_CHEAPTRAPS_P)\ |
6dbd0af5 | 2091 | {\ |
c0ab1b8d | 2092 | tmp = scm_make_debugobj (&debug);\ |
d95c0b76 | 2093 | scm_call_3 (SCM_APPLY_FRAME_HDLR, scm_sym_apply_frame, tmp, tail);\ |
b6d75948 | 2094 | }\ |
6dbd0af5 MD |
2095 | else\ |
2096 | {\ | |
5f144b10 GH |
2097 | int first;\ |
2098 | tmp = scm_make_continuation (&first);\ | |
2099 | if (first)\ | |
d95c0b76 | 2100 | scm_call_3 (SCM_APPLY_FRAME_HDLR, scm_sym_apply_frame, tmp, tail);\ |
6dbd0af5 | 2101 | }\ |
d95c0b76 | 2102 | SCM_TRAPS_P = 1;\ |
6dbd0af5 | 2103 | }\ |
d3a6bc94 | 2104 | } while (0) |
0f2d19dd | 2105 | #undef RETURN |
ddea3325 | 2106 | #define RETURN(e) do { proc = (e); goto exit; } while (0) |
b7ff98dd MD |
2107 | #ifdef STACK_CHECKING |
2108 | #ifndef EVAL_STACK_CHECKING | |
2109 | #define EVAL_STACK_CHECKING | |
2110 | #endif | |
6dbd0af5 MD |
2111 | #endif |
2112 | ||
2113 | /* scm_ceval_ptr points to the currently selected evaluator. | |
2114 | * *fixme*: Although efficiency is important here, this state variable | |
2115 | * should probably not be a global. It should be related to the | |
2116 | * current repl. | |
2117 | */ | |
2118 | ||
1cc91f1b | 2119 | |
1bbd0b84 | 2120 | SCM (*scm_ceval_ptr) (SCM x, SCM env); |
0f2d19dd | 2121 | |
1646d37b | 2122 | /* scm_last_debug_frame contains a pointer to the last debugging |
6dbd0af5 MD |
2123 | * information stack frame. It is accessed very often from the |
2124 | * debugging evaluator, so it should probably not be indirectly | |
2125 | * addressed. Better to save and restore it from the current root at | |
2126 | * any stack swaps. | |
2127 | */ | |
2128 | ||
6dbd0af5 MD |
2129 | /* scm_debug_eframe_size is the number of slots available for pseudo |
2130 | * stack frames at each real stack frame. | |
2131 | */ | |
2132 | ||
c014a02e | 2133 | long scm_debug_eframe_size; |
6dbd0af5 | 2134 | |
b7ff98dd | 2135 | int scm_debug_mode, scm_check_entry_p, scm_check_apply_p, scm_check_exit_p; |
6dbd0af5 | 2136 | |
c014a02e | 2137 | long scm_eval_stack; |
a74145b8 | 2138 | |
92c2555f | 2139 | scm_t_option scm_eval_opts[] = { |
a74145b8 | 2140 | { SCM_OPTION_INTEGER, "stack", 22000, "Size of thread stacks (in machine words)." } |
33b97402 MD |
2141 | }; |
2142 | ||
92c2555f | 2143 | scm_t_option scm_debug_opts[] = { |
b7ff98dd MD |
2144 | { SCM_OPTION_BOOLEAN, "cheap", 1, |
2145 | "*Flyweight representation of the stack at traps." }, | |
2146 | { SCM_OPTION_BOOLEAN, "breakpoints", 0, "*Check for breakpoints." }, | |
2147 | { SCM_OPTION_BOOLEAN, "trace", 0, "*Trace mode." }, | |
2148 | { SCM_OPTION_BOOLEAN, "procnames", 1, | |
2149 | "Record procedure names at definition." }, | |
2150 | { SCM_OPTION_BOOLEAN, "backwards", 0, | |
2151 | "Display backtrace in anti-chronological order." }, | |
274dc5fd | 2152 | { SCM_OPTION_INTEGER, "width", 79, "Maximal width of backtrace." }, |
4e646a03 MD |
2153 | { SCM_OPTION_INTEGER, "indent", 10, "Maximal indentation in backtrace." }, |
2154 | { SCM_OPTION_INTEGER, "frames", 3, | |
b7ff98dd | 2155 | "Maximum number of tail-recursive frames in backtrace." }, |
4e646a03 MD |
2156 | { SCM_OPTION_INTEGER, "maxdepth", 1000, |
2157 | "Maximal number of stored backtrace frames." }, | |
2158 | { SCM_OPTION_INTEGER, "depth", 20, "Maximal length of printed backtrace." }, | |
11f77bfc MD |
2159 | { SCM_OPTION_BOOLEAN, "backtrace", 0, "Show backtrace on error." }, |
2160 | { SCM_OPTION_BOOLEAN, "debug", 0, "Use the debugging evaluator." }, | |
863e833b | 2161 | { SCM_OPTION_INTEGER, "stack", 20000, "Stack size limit (measured in words; 0 = no check)." }, |
d95c0b76 | 2162 | { 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 |
2163 | }; |
2164 | ||
92c2555f | 2165 | scm_t_option scm_evaluator_trap_table[] = { |
b6d75948 | 2166 | { SCM_OPTION_BOOLEAN, "traps", 0, "Enable evaluator traps." }, |
b7ff98dd MD |
2167 | { SCM_OPTION_BOOLEAN, "enter-frame", 0, "Trap when eval enters new frame." }, |
2168 | { SCM_OPTION_BOOLEAN, "apply-frame", 0, "Trap when entering apply." }, | |
d95c0b76 NJ |
2169 | { SCM_OPTION_BOOLEAN, "exit-frame", 0, "Trap when exiting eval or apply." }, |
2170 | { SCM_OPTION_SCM, "enter-frame-handler", (unsigned long)SCM_BOOL_F, "Handler for enter-frame traps." }, | |
2171 | { SCM_OPTION_SCM, "apply-frame-handler", (unsigned long)SCM_BOOL_F, "Handler for apply-frame traps." }, | |
2172 | { SCM_OPTION_SCM, "exit-frame-handler", (unsigned long)SCM_BOOL_F, "Handler for exit-frame traps." } | |
6dbd0af5 MD |
2173 | }; |
2174 | ||
a1ec6916 | 2175 | SCM_DEFINE (scm_eval_options_interface, "eval-options-interface", 0, 1, 0, |
1bbd0b84 | 2176 | (SCM setting), |
b3f26b14 MG |
2177 | "Option interface for the evaluation options. Instead of using\n" |
2178 | "this procedure directly, use the procedures @code{eval-enable},\n" | |
3939e9df | 2179 | "@code{eval-disable}, @code{eval-set!} and @code{eval-options}.") |
1bbd0b84 | 2180 | #define FUNC_NAME s_scm_eval_options_interface |
33b97402 MD |
2181 | { |
2182 | SCM ans; | |
2183 | SCM_DEFER_INTS; | |
2184 | ans = scm_options (setting, | |
2185 | scm_eval_opts, | |
2186 | SCM_N_EVAL_OPTIONS, | |
1bbd0b84 | 2187 | FUNC_NAME); |
a74145b8 | 2188 | scm_eval_stack = SCM_EVAL_STACK * sizeof (void *); |
33b97402 MD |
2189 | SCM_ALLOW_INTS; |
2190 | return ans; | |
2191 | } | |
1bbd0b84 | 2192 | #undef FUNC_NAME |
33b97402 | 2193 | |
d0b07b5d | 2194 | |
a1ec6916 | 2195 | SCM_DEFINE (scm_evaluator_traps, "evaluator-traps-interface", 0, 1, 0, |
1bbd0b84 | 2196 | (SCM setting), |
b3f26b14 | 2197 | "Option interface for the evaluator trap options.") |
1bbd0b84 | 2198 | #define FUNC_NAME s_scm_evaluator_traps |
33b97402 MD |
2199 | { |
2200 | SCM ans; | |
2201 | SCM_DEFER_INTS; | |
2202 | ans = scm_options (setting, | |
2203 | scm_evaluator_trap_table, | |
2204 | SCM_N_EVALUATOR_TRAPS, | |
1bbd0b84 | 2205 | FUNC_NAME); |
33b97402 | 2206 | SCM_RESET_DEBUG_MODE; |
bfc69694 | 2207 | SCM_ALLOW_INTS; |
33b97402 MD |
2208 | return ans; |
2209 | } | |
1bbd0b84 | 2210 | #undef FUNC_NAME |
33b97402 | 2211 | |
d0b07b5d | 2212 | |
24933780 | 2213 | static SCM |
a392ee15 | 2214 | deval_args (SCM l, SCM env, SCM proc, SCM *lloc) |
0f2d19dd | 2215 | { |
680ed4a8 | 2216 | SCM *results = lloc, res; |
904a077d | 2217 | while (SCM_CONSP (l)) |
0f2d19dd | 2218 | { |
680ed4a8 | 2219 | res = EVALCAR (l, env); |
904a077d | 2220 | |
8ea46249 | 2221 | *lloc = scm_list_1 (res); |
a23afe53 | 2222 | lloc = SCM_CDRLOC (*lloc); |
0f2d19dd JB |
2223 | l = SCM_CDR (l); |
2224 | } | |
22a52da1 | 2225 | if (!SCM_NULLP (l)) |
904a077d | 2226 | scm_wrong_num_args (proc); |
680ed4a8 | 2227 | return *results; |
0f2d19dd JB |
2228 | } |
2229 | ||
6dbd0af5 MD |
2230 | #endif /* !DEVAL */ |
2231 | ||
2232 | ||
a392ee15 | 2233 | /* SECTION: This code is compiled twice. |
6dbd0af5 MD |
2234 | */ |
2235 | ||
a392ee15 | 2236 | |
d9d39d76 | 2237 | /* Update the toplevel environment frame ENV so that it refers to the |
a392ee15 | 2238 | * current module. */ |
d9d39d76 MV |
2239 | #define UPDATE_TOPLEVEL_ENV(env) \ |
2240 | do { \ | |
2241 | SCM p = scm_current_module_lookup_closure (); \ | |
d0b07b5d | 2242 | if (p != SCM_CAR (env)) \ |
d9d39d76 MV |
2243 | env = scm_top_level_env (p); \ |
2244 | } while (0) | |
2245 | ||
6dbd0af5 | 2246 | |
a392ee15 DH |
2247 | /* This is the evaluator. Like any real monster, it has three heads: |
2248 | * | |
2249 | * scm_ceval is the non-debugging evaluator, scm_deval is the debugging | |
2250 | * version. Both are implemented using a common code base, using the | |
2251 | * following mechanism: SCM_CEVAL is a macro, which is either defined to | |
2252 | * scm_ceval or scm_deval. Thus, there is no function SCM_CEVAL, but the code | |
2253 | * for SCM_CEVAL actually compiles to either scm_ceval or scm_deval. When | |
2254 | * SCM_CEVAL is defined to scm_ceval, it is known that the macro DEVAL is not | |
2255 | * defined. When SCM_CEVAL is defined to scm_deval, then the macro DEVAL is | |
2256 | * known to be defined. Thus, in SCM_CEVAL parts for the debugging evaluator | |
2257 | * are enclosed within #ifdef DEVAL ... #endif. | |
2258 | * | |
2259 | * All three (scm_ceval, scm_deval and their common implementation SCM_CEVAL) | |
2260 | * take two input parameters, x and env: x is a single expression to be | |
2261 | * evalutated. env is the environment in which bindings are searched. | |
2262 | * | |
2263 | * x is known to be a cell (i. e. a pair or any other non-immediate). Since x | |
2264 | * is a single expression, it is necessarily in a tail position. If x is just | |
2265 | * a call to another function like in the expression (foo exp1 exp2 ...), the | |
2266 | * realization of that call therefore _must_not_ increase stack usage (the | |
2267 | * evaluation of exp1, exp2 etc., however, may do so). This is realized by | |
2268 | * making extensive use of 'goto' statements within the evaluator: The gotos | |
2269 | * replace recursive calls to SCM_CEVAL, thus re-using the same stack frame | |
2270 | * that SCM_CEVAL was already using. If, however, x represents some form that | |
2271 | * requires to evaluate a sequence of expressions like (begin exp1 exp2 ...), | |
2272 | * then recursive calls to SCM_CEVAL are performed for all but the last | |
2273 | * expression of that sequence. */ | |
6dbd0af5 | 2274 | |
0f2d19dd | 2275 | #if 0 |
0f2d19dd | 2276 | SCM |
1bbd0b84 | 2277 | scm_ceval (SCM x, SCM env) |
0f2d19dd JB |
2278 | {} |
2279 | #endif | |
1cc91f1b | 2280 | |
a392ee15 | 2281 | #if 0 |
0f2d19dd | 2282 | SCM |
1bbd0b84 | 2283 | scm_deval (SCM x, SCM env) |
0f2d19dd JB |
2284 | {} |
2285 | #endif | |
2286 | ||
6dbd0af5 | 2287 | SCM |
1bbd0b84 | 2288 | SCM_CEVAL (SCM x, SCM env) |
0f2d19dd | 2289 | { |
42030fb2 | 2290 | SCM proc, arg1; |
6dbd0af5 | 2291 | #ifdef DEVAL |
92c2555f MV |
2292 | scm_t_debug_frame debug; |
2293 | scm_t_debug_info *debug_info_end; | |
1646d37b | 2294 | debug.prev = scm_last_debug_frame; |
020c890c | 2295 | debug.status = 0; |
04b6c081 | 2296 | /* |
92c2555f | 2297 | * The debug.vect contains twice as much scm_t_debug_info frames as the |
04b6c081 MD |
2298 | * user has specified with (debug-set! frames <n>). |
2299 | * | |
2300 | * Even frames are eval frames, odd frames are apply frames. | |
2301 | */ | |
92c2555f | 2302 | debug.vect = (scm_t_debug_info *) alloca (scm_debug_eframe_size |
a392ee15 | 2303 | * sizeof (scm_t_debug_info)); |
c0ab1b8d JB |
2304 | debug.info = debug.vect; |
2305 | debug_info_end = debug.vect + scm_debug_eframe_size; | |
2306 | scm_last_debug_frame = &debug; | |
6dbd0af5 | 2307 | #endif |
b7ff98dd | 2308 | #ifdef EVAL_STACK_CHECKING |
79f55b7c | 2309 | if (scm_stack_checking_enabled_p && SCM_STACK_OVERFLOW_P (&proc)) |
6dbd0af5 | 2310 | { |
b7ff98dd | 2311 | #ifdef DEVAL |
6dbd0af5 MD |
2312 | debug.info->e.exp = x; |
2313 | debug.info->e.env = env; | |
b7ff98dd | 2314 | #endif |
6dbd0af5 MD |
2315 | scm_report_stack_overflow (); |
2316 | } | |
2317 | #endif | |
6a0f6ff3 | 2318 | |
6dbd0af5 MD |
2319 | #ifdef DEVAL |
2320 | goto start; | |
2321 | #endif | |
6a0f6ff3 | 2322 | |
6dbd0af5 MD |
2323 | loop: |
2324 | #ifdef DEVAL | |
b7ff98dd MD |
2325 | SCM_CLEAR_ARGSREADY (debug); |
2326 | if (SCM_OVERFLOWP (debug)) | |
6dbd0af5 | 2327 | --debug.info; |
04b6c081 MD |
2328 | /* |
2329 | * In theory, this should be the only place where it is necessary to | |
2330 | * check for space in debug.vect since both eval frames and | |
2331 | * available space are even. | |
2332 | * | |
2333 | * For this to be the case, however, it is necessary that primitive | |
2334 | * special forms which jump back to `loop', `begin' or some similar | |
680516ba | 2335 | * label call PREP_APPLY. |
04b6c081 | 2336 | */ |
c0ab1b8d | 2337 | else if (++debug.info >= debug_info_end) |
6dbd0af5 | 2338 | { |
b7ff98dd | 2339 | SCM_SET_OVERFLOW (debug); |
6dbd0af5 MD |
2340 | debug.info -= 2; |
2341 | } | |
6a0f6ff3 | 2342 | |
6dbd0af5 MD |
2343 | start: |
2344 | debug.info->e.exp = x; | |
2345 | debug.info->e.env = env; | |
5132eef0 DH |
2346 | if (scm_check_entry_p && SCM_TRAPS_P) |
2347 | { | |
bc76d628 DH |
2348 | if (SCM_ENTER_FRAME_P |
2349 | || (SCM_BREAKPOINTS_P && scm_c_source_property_breakpoint_p (x))) | |
5132eef0 | 2350 | { |
bc76d628 DH |
2351 | SCM stackrep; |
2352 | SCM tail = SCM_BOOL (SCM_TAILRECP (debug)); | |
5132eef0 DH |
2353 | SCM_SET_TAILREC (debug); |
2354 | if (SCM_CHEAPTRAPS_P) | |
bc76d628 | 2355 | stackrep = scm_make_debugobj (&debug); |
5132eef0 DH |
2356 | else |
2357 | { | |
2358 | int first; | |
2359 | SCM val = scm_make_continuation (&first); | |
2360 | ||
2361 | if (first) | |
bc76d628 | 2362 | stackrep = val; |
5132eef0 DH |
2363 | else |
2364 | { | |
2365 | x = val; | |
2366 | if (SCM_IMP (x)) | |
2367 | RETURN (x); | |
2368 | else | |
2369 | /* This gives the possibility for the debugger to | |
2370 | modify the source expression before evaluation. */ | |
2371 | goto dispatch; | |
2372 | } | |
2373 | } | |
2374 | SCM_TRAPS_P = 0; | |
2375 | scm_call_4 (SCM_ENTER_FRAME_HDLR, | |
2376 | scm_sym_enter_frame, | |
bc76d628 | 2377 | stackrep, |
5132eef0 DH |
2378 | tail, |
2379 | scm_unmemocopy (x, env)); | |
2380 | SCM_TRAPS_P = 1; | |
2381 | } | |
2382 | } | |
6dbd0af5 | 2383 | #endif |
f8769b1d | 2384 | dispatch: |
9cb5124f | 2385 | SCM_TICK; |
0f2d19dd JB |
2386 | switch (SCM_TYP7 (x)) |
2387 | { | |
28b06554 | 2388 | case scm_tc7_symbol: |
a392ee15 | 2389 | /* Only happens when called at top level. */ |
0f2d19dd | 2390 | x = scm_cons (x, SCM_UNDEFINED); |
ddea3325 | 2391 | RETURN (*scm_lookupcar (x, env, 1)); |
0f2d19dd | 2392 | |
1b43d24c | 2393 | case SCM_BIT7 (SCM_IM_AND): |
0f2d19dd | 2394 | x = SCM_CDR (x); |
302c12b4 DH |
2395 | while (!SCM_NULLP (SCM_CDR (x))) |
2396 | { | |
38ace99e DH |
2397 | SCM test_result = EVALCAR (x, env); |
2398 | if (SCM_FALSEP (test_result) || SCM_NILP (test_result)) | |
0f2d19dd | 2399 | RETURN (SCM_BOOL_F); |
302c12b4 DH |
2400 | else |
2401 | x = SCM_CDR (x); | |
2402 | } | |
6dbd0af5 | 2403 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
2404 | goto carloop; |
2405 | ||
1b43d24c | 2406 | case SCM_BIT7 (SCM_IM_BEGIN): |
e050d4f8 DH |
2407 | x = SCM_CDR (x); |
2408 | if (SCM_NULLP (x)) | |
b8113bc8 MV |
2409 | RETURN (SCM_UNSPECIFIED); |
2410 | ||
6dbd0af5 | 2411 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
2412 | |
2413 | begin: | |
4163eb72 MV |
2414 | /* If we are on toplevel with a lookup closure, we need to sync |
2415 | with the current module. */ | |
22a52da1 | 2416 | if (SCM_CONSP (env) && !SCM_CONSP (SCM_CAR (env))) |
4163eb72 | 2417 | { |
d9d39d76 | 2418 | UPDATE_TOPLEVEL_ENV (env); |
302c12b4 | 2419 | while (!SCM_NULLP (SCM_CDR (x))) |
4163eb72 | 2420 | { |
5280aaca | 2421 | EVALCAR (x, env); |
d9d39d76 | 2422 | UPDATE_TOPLEVEL_ENV (env); |
302c12b4 | 2423 | x = SCM_CDR (x); |
4163eb72 | 2424 | } |
5280aaca | 2425 | goto carloop; |
4163eb72 MV |
2426 | } |
2427 | else | |
5280aaca MV |
2428 | goto nontoplevel_begin; |
2429 | ||
5280aaca | 2430 | nontoplevel_begin: |
302c12b4 | 2431 | while (!SCM_NULLP (SCM_CDR (x))) |
0f2d19dd | 2432 | { |
6a0f6ff3 DH |
2433 | SCM form = SCM_CAR (x); |
2434 | if (SCM_IMP (form)) | |
26d5b9b4 | 2435 | { |
6a0f6ff3 | 2436 | if (SCM_ISYMP (form)) |
26d5b9b4 | 2437 | { |
28d52ebb | 2438 | scm_rec_mutex_lock (&source_mutex); |
9bc4701c MD |
2439 | /* check for race condition */ |
2440 | if (SCM_ISYMP (SCM_CAR (x))) | |
2441 | x = scm_m_expand_body (x, env); | |
28d52ebb | 2442 | scm_rec_mutex_unlock (&source_mutex); |
5280aaca | 2443 | goto nontoplevel_begin; |
26d5b9b4 | 2444 | } |
4163eb72 | 2445 | else |
6a0f6ff3 | 2446 | SCM_VALIDATE_NON_EMPTY_COMBINATION (form); |
26d5b9b4 | 2447 | } |
5280aaca | 2448 | else |
6a0f6ff3 | 2449 | SCM_CEVAL (form, env); |
302c12b4 | 2450 | x = SCM_CDR (x); |
0f2d19dd | 2451 | } |
5280aaca | 2452 | |
6a0f6ff3 DH |
2453 | carloop: |
2454 | { | |
2455 | /* scm_eval last form in list */ | |
2456 | SCM last_form = SCM_CAR (x); | |
0f2d19dd | 2457 | |
6a0f6ff3 DH |
2458 | if (SCM_CONSP (last_form)) |
2459 | { | |
2460 | /* This is by far the most frequent case. */ | |
2461 | x = last_form; | |
2462 | goto loop; /* tail recurse */ | |
2463 | } | |
2464 | else if (SCM_IMP (last_form)) | |
2465 | RETURN (SCM_EVALIM (last_form, env)); | |
2466 | else if (SCM_VARIABLEP (last_form)) | |
2467 | RETURN (SCM_VARIABLE_REF (last_form)); | |
2468 | else if (SCM_SYMBOLP (last_form)) | |
2469 | RETURN (*scm_lookupcar (x, env, 1)); | |
2470 | else | |
2471 | RETURN (last_form); | |
2472 | } | |
0f2d19dd JB |
2473 | |
2474 | ||
1b43d24c | 2475 | case SCM_BIT7 (SCM_IM_CASE): |
0f2d19dd | 2476 | x = SCM_CDR (x); |
6a0f6ff3 DH |
2477 | { |
2478 | SCM key = EVALCAR (x, env); | |
2479 | x = SCM_CDR (x); | |
2480 | while (!SCM_NULLP (x)) | |
2481 | { | |
2482 | SCM clause = SCM_CAR (x); | |
2483 | SCM labels = SCM_CAR (clause); | |
2a6f7afe | 2484 | if (SCM_EQ_P (labels, SCM_IM_ELSE)) |
6a0f6ff3 DH |
2485 | { |
2486 | x = SCM_CDR (clause); | |
2487 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2488 | goto begin; | |
2489 | } | |
2490 | while (!SCM_NULLP (labels)) | |
2491 | { | |
2492 | SCM label = SCM_CAR (labels); | |
2493 | if (SCM_EQ_P (label, key) || !SCM_FALSEP (scm_eqv_p (label, key))) | |
2494 | { | |
2495 | x = SCM_CDR (clause); | |
2496 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2497 | goto begin; | |
2498 | } | |
2499 | labels = SCM_CDR (labels); | |
2500 | } | |
2501 | x = SCM_CDR (x); | |
2502 | } | |
2503 | } | |
ddea3325 | 2504 | RETURN (SCM_UNSPECIFIED); |
0f2d19dd JB |
2505 | |
2506 | ||
1b43d24c | 2507 | case SCM_BIT7 (SCM_IM_COND): |
8ea46249 DH |
2508 | x = SCM_CDR (x); |
2509 | while (!SCM_NULLP (x)) | |
0f2d19dd | 2510 | { |
e5cb71a0 | 2511 | SCM clause = SCM_CAR (x); |
609a8b86 | 2512 | if (SCM_EQ_P (SCM_CAR (clause), SCM_IM_ELSE)) |
8ea46249 | 2513 | { |
e5cb71a0 | 2514 | x = SCM_CDR (clause); |
8ea46249 DH |
2515 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
2516 | goto begin; | |
2517 | } | |
e5cb71a0 | 2518 | else |
0f2d19dd | 2519 | { |
dff98306 DH |
2520 | arg1 = EVALCAR (clause, env); |
2521 | if (!SCM_FALSEP (arg1) && !SCM_NILP (arg1)) | |
6dbd0af5 | 2522 | { |
e5cb71a0 DH |
2523 | x = SCM_CDR (clause); |
2524 | if (SCM_NULLP (x)) | |
dff98306 | 2525 | RETURN (arg1); |
609a8b86 | 2526 | else if (!SCM_EQ_P (SCM_CAR (x), SCM_IM_ARROW)) |
e5cb71a0 DH |
2527 | { |
2528 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2529 | goto begin; | |
2530 | } | |
2531 | else | |
2532 | { | |
2533 | proc = SCM_CDR (x); | |
2534 | proc = EVALCAR (proc, env); | |
dff98306 | 2535 | PREP_APPLY (proc, scm_list_1 (arg1)); |
e5cb71a0 | 2536 | ENTER_APPLY; |
ddd8f927 | 2537 | goto evap1; |
e5cb71a0 | 2538 | } |
6dbd0af5 | 2539 | } |
e5cb71a0 | 2540 | x = SCM_CDR (x); |
0f2d19dd JB |
2541 | } |
2542 | } | |
ddea3325 | 2543 | RETURN (SCM_UNSPECIFIED); |
0f2d19dd JB |
2544 | |
2545 | ||
1b43d24c | 2546 | case SCM_BIT7 (SCM_IM_DO): |
0f2d19dd | 2547 | x = SCM_CDR (x); |
e5cb71a0 DH |
2548 | { |
2549 | /* Compute the initialization values and the initial environment. */ | |
e681d187 | 2550 | SCM init_forms = SCM_CAR (x); |
e5cb71a0 DH |
2551 | SCM init_values = SCM_EOL; |
2552 | while (!SCM_NULLP (init_forms)) | |
2553 | { | |
2554 | init_values = scm_cons (EVALCAR (init_forms, env), init_values); | |
2555 | init_forms = SCM_CDR (init_forms); | |
2556 | } | |
e681d187 | 2557 | x = SCM_CDR (x); |
821f18a4 | 2558 | env = SCM_EXTEND_ENV (SCM_CAR (x), init_values, env); |
e5cb71a0 | 2559 | } |
e681d187 | 2560 | x = SCM_CDR (x); |
e5cb71a0 DH |
2561 | { |
2562 | SCM test_form = SCM_CAR (x); | |
2563 | SCM body_forms = SCM_CADR (x); | |
2564 | SCM step_forms = SCM_CDDR (x); | |
2565 | ||
2566 | SCM test_result = EVALCAR (test_form, env); | |
2567 | ||
2568 | while (SCM_FALSEP (test_result) || SCM_NILP (test_result)) | |
2569 | { | |
0f2d19dd | 2570 | { |
e5cb71a0 DH |
2571 | /* Evaluate body forms. */ |
2572 | SCM temp_forms; | |
2573 | for (temp_forms = body_forms; | |
2574 | !SCM_NULLP (temp_forms); | |
2575 | temp_forms = SCM_CDR (temp_forms)) | |
2576 | { | |
2577 | SCM form = SCM_CAR (temp_forms); | |
2578 | /* Dirk:FIXME: We only need to eval forms, that may have a | |
2579 | * side effect here. This is only true for forms that start | |
2580 | * with a pair. All others are just constants. However, | |
2581 | * since in the common case there is no constant expression | |
2582 | * in a body of a do form, we just check for immediates here | |
2583 | * and have SCM_CEVAL take care of other cases. In the long | |
2584 | * run it would make sense to get rid of this test and have | |
2585 | * the macro transformer of 'do' eliminate all forms that | |
2586 | * have no sideeffect. */ | |
2587 | if (!SCM_IMP (form)) | |
2588 | SCM_CEVAL (form, env); | |
2589 | } | |
0f2d19dd | 2590 | } |
e5cb71a0 DH |
2591 | |
2592 | { | |
2593 | /* Evaluate the step expressions. */ | |
2594 | SCM temp_forms; | |
2595 | SCM step_values = SCM_EOL; | |
2596 | for (temp_forms = step_forms; | |
2597 | !SCM_NULLP (temp_forms); | |
2598 | temp_forms = SCM_CDR (temp_forms)) | |
2599 | { | |
2600 | SCM value = EVALCAR (temp_forms, env); | |
2601 | step_values = scm_cons (value, step_values); | |
2602 | } | |
821f18a4 DH |
2603 | env = SCM_EXTEND_ENV (SCM_CAAR (env), |
2604 | step_values, | |
2605 | SCM_CDR (env)); | |
e5cb71a0 DH |
2606 | } |
2607 | ||
2608 | test_result = EVALCAR (test_form, env); | |
2609 | } | |
2610 | } | |
2611 | x = SCM_CDAR (x); | |
0f2d19dd | 2612 | if (SCM_NULLP (x)) |
6dbd0af5 MD |
2613 | RETURN (SCM_UNSPECIFIED); |
2614 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
5280aaca | 2615 | goto nontoplevel_begin; |
0f2d19dd JB |
2616 | |
2617 | ||
1b43d24c | 2618 | case SCM_BIT7 (SCM_IM_IF): |
0f2d19dd | 2619 | x = SCM_CDR (x); |
38ace99e DH |
2620 | { |
2621 | SCM test_result = EVALCAR (x, env); | |
2622 | if (!SCM_FALSEP (test_result) && !SCM_NILP (test_result)) | |
2623 | x = SCM_CDR (x); | |
2624 | else | |
2625 | { | |
2626 | x = SCM_CDDR (x); | |
2627 | if (SCM_NULLP (x)) | |
2628 | RETURN (SCM_UNSPECIFIED); | |
2629 | } | |
2630 | } | |
6dbd0af5 | 2631 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
2632 | goto carloop; |
2633 | ||
2634 | ||
1b43d24c | 2635 | case SCM_BIT7 (SCM_IM_LET): |
0f2d19dd | 2636 | x = SCM_CDR (x); |
38ace99e DH |
2637 | { |
2638 | SCM init_forms = SCM_CADR (x); | |
2639 | SCM init_values = SCM_EOL; | |
2640 | do | |
2641 | { | |
2642 | init_values = scm_cons (EVALCAR (init_forms, env), init_values); | |
2643 | init_forms = SCM_CDR (init_forms); | |
2644 | } | |
2645 | while (!SCM_NULLP (init_forms)); | |
821f18a4 | 2646 | env = SCM_EXTEND_ENV (SCM_CAR (x), init_values, env); |
38ace99e | 2647 | } |
e050d4f8 DH |
2648 | x = SCM_CDDR (x); |
2649 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2650 | goto nontoplevel_begin; | |
0f2d19dd JB |
2651 | |
2652 | ||
1b43d24c | 2653 | case SCM_BIT7 (SCM_IM_LETREC): |
0f2d19dd | 2654 | x = SCM_CDR (x); |
821f18a4 | 2655 | env = SCM_EXTEND_ENV (SCM_CAR (x), undefineds, env); |
0f2d19dd | 2656 | x = SCM_CDR (x); |
38ace99e DH |
2657 | { |
2658 | SCM init_forms = SCM_CAR (x); | |
2659 | SCM init_values = SCM_EOL; | |
2660 | do | |
2661 | { | |
2662 | init_values = scm_cons (EVALCAR (init_forms, env), init_values); | |
2663 | init_forms = SCM_CDR (init_forms); | |
2664 | } | |
2665 | while (!SCM_NULLP (init_forms)); | |
2666 | SCM_SETCDR (SCM_CAR (env), init_values); | |
2667 | } | |
e050d4f8 DH |
2668 | x = SCM_CDR (x); |
2669 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2670 | goto nontoplevel_begin; | |
0f2d19dd JB |
2671 | |
2672 | ||
1b43d24c | 2673 | case SCM_BIT7 (SCM_IM_LETSTAR): |
0f2d19dd | 2674 | x = SCM_CDR (x); |
302c12b4 DH |
2675 | { |
2676 | SCM bindings = SCM_CAR (x); | |
2677 | if (SCM_NULLP (bindings)) | |
821f18a4 | 2678 | env = SCM_EXTEND_ENV (SCM_EOL, SCM_EOL, env); |
302c12b4 DH |
2679 | else |
2680 | { | |
2681 | do | |
2682 | { | |
2683 | SCM name = SCM_CAR (bindings); | |
2684 | SCM init = SCM_CDR (bindings); | |
821f18a4 | 2685 | env = SCM_EXTEND_ENV (name, EVALCAR (init, env), env); |
302c12b4 DH |
2686 | bindings = SCM_CDR (init); |
2687 | } | |
2688 | while (!SCM_NULLP (bindings)); | |
2689 | } | |
2690 | } | |
e050d4f8 DH |
2691 | x = SCM_CDR (x); |
2692 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2693 | goto nontoplevel_begin; | |
0f2d19dd | 2694 | |
302c12b4 | 2695 | |
1b43d24c | 2696 | case SCM_BIT7 (SCM_IM_OR): |
0f2d19dd | 2697 | x = SCM_CDR (x); |
302c12b4 | 2698 | while (!SCM_NULLP (SCM_CDR (x))) |
0f2d19dd | 2699 | { |
302c12b4 | 2700 | SCM val = EVALCAR (x, env); |
c96d76b8 | 2701 | if (!SCM_FALSEP (val) && !SCM_NILP (val)) |
302c12b4 DH |
2702 | RETURN (val); |
2703 | else | |
2704 | x = SCM_CDR (x); | |
0f2d19dd | 2705 | } |
6dbd0af5 | 2706 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
2707 | goto carloop; |
2708 | ||
2709 | ||
1b43d24c | 2710 | case SCM_BIT7 (SCM_IM_LAMBDA): |
0f2d19dd JB |
2711 | RETURN (scm_closure (SCM_CDR (x), env)); |
2712 | ||
2713 | ||
1b43d24c | 2714 | case SCM_BIT7 (SCM_IM_QUOTE): |
8ea46249 | 2715 | RETURN (SCM_CADR (x)); |
0f2d19dd JB |
2716 | |
2717 | ||
1b43d24c | 2718 | case SCM_BIT7 (SCM_IM_SET_X): |
0f2d19dd | 2719 | x = SCM_CDR (x); |
38ace99e DH |
2720 | { |
2721 | SCM *location; | |
2722 | SCM variable = SCM_CAR (x); | |
e050d4f8 | 2723 | if (SCM_ILOCP (variable)) |
38ace99e | 2724 | location = scm_ilookup (variable, env); |
3063e30a | 2725 | else if (SCM_VARIABLEP (variable)) |
e050d4f8 | 2726 | location = SCM_VARIABLE_LOC (variable); |
38ace99e DH |
2727 | else /* (SCM_SYMBOLP (variable)) is known to be true */ |
2728 | location = scm_lookupcar (x, env, 1); | |
2729 | x = SCM_CDR (x); | |
2730 | *location = EVALCAR (x, env); | |
2731 | } | |
0f2d19dd | 2732 | RETURN (SCM_UNSPECIFIED); |
0f2d19dd JB |
2733 | |
2734 | ||
0f2d19dd | 2735 | /* new syntactic forms go here. */ |
1b43d24c | 2736 | case SCM_BIT7 (SCM_MAKISYM (0)): |
0f2d19dd | 2737 | proc = SCM_CAR (x); |
a392ee15 | 2738 | switch (SCM_ISYMNUM (proc)) |
0f2d19dd | 2739 | { |
3f04400d DH |
2740 | |
2741 | ||
22f2cf2d DH |
2742 | case (SCM_ISYMNUM (SCM_IM_DEFINE)): |
2743 | /* Top level defines are handled directly by the memoizer and thus | |
2744 | * will never generate memoized code with SCM_IM_DEFINE. Internal | |
2745 | * defines which occur at valid positions will be transformed into | |
2746 | * letrec expressions. Thus, whenever the executor detects | |
2747 | * SCM_IM_DEFINE, this must come from an internal definition at an | |
2748 | * illegal position. */ | |
2749 | scm_misc_error (NULL, "Bad define placement", SCM_EOL); | |
2750 | ||
2751 | ||
0f2d19dd | 2752 | case (SCM_ISYMNUM (SCM_IM_APPLY)): |
e910e9d2 DH |
2753 | x = SCM_CDR (x); |
2754 | proc = EVALCAR (x, env); | |
2755 | PREP_APPLY (proc, SCM_EOL); | |
2756 | x = SCM_CDR (x); | |
2757 | arg1 = EVALCAR (x, env); | |
9a069bdd DH |
2758 | |
2759 | apply_proc: | |
2760 | /* Go here to tail-apply a procedure. PROC is the procedure and | |
2761 | * ARG1 is the list of arguments. PREP_APPLY must have been called | |
2762 | * before jumping to apply_proc. */ | |
0f2d19dd JB |
2763 | if (SCM_CLOSUREP (proc)) |
2764 | { | |
9a069bdd | 2765 | SCM formals = SCM_CLOSURE_FORMALS (proc); |
6dbd0af5 | 2766 | #ifdef DEVAL |
9a069bdd | 2767 | debug.info->a.args = arg1; |
6dbd0af5 | 2768 | #endif |
9a069bdd DH |
2769 | if (scm_badargsp (formals, arg1)) |
2770 | scm_wrong_num_args (proc); | |
2771 | ENTER_APPLY; | |
2772 | /* Copy argument list */ | |
2773 | if (SCM_NULL_OR_NIL_P (arg1)) | |
2774 | env = SCM_EXTEND_ENV (formals, SCM_EOL, SCM_ENV (proc)); | |
2775 | else | |
2776 | { | |
2777 | SCM args = scm_list_1 (SCM_CAR (arg1)); | |
2778 | SCM tail = args; | |
2779 | arg1 = SCM_CDR (arg1); | |
2780 | while (!SCM_NULL_OR_NIL_P (arg1)) | |
2781 | { | |
2782 | SCM new_tail = scm_list_1 (SCM_CAR (arg1)); | |
2783 | SCM_SETCDR (tail, new_tail); | |
2784 | tail = new_tail; | |
2785 | arg1 = SCM_CDR (arg1); | |
2786 | } | |
2787 | env = SCM_EXTEND_ENV (formals, args, SCM_ENV (proc)); | |
2788 | } | |
2789 | ||
2790 | x = SCM_CLOSURE_BODY (proc); | |
2791 | goto nontoplevel_begin; | |
0f2d19dd | 2792 | } |
3f04400d DH |
2793 | else |
2794 | { | |
e910e9d2 DH |
2795 | ENTER_APPLY; |
2796 | RETURN (SCM_APPLY (proc, arg1, SCM_EOL)); | |
3f04400d DH |
2797 | } |
2798 | ||
0f2d19dd JB |
2799 | |
2800 | case (SCM_ISYMNUM (SCM_IM_CONT)): | |
5f144b10 GH |
2801 | { |
2802 | int first; | |
2803 | SCM val = scm_make_continuation (&first); | |
2804 | ||
e050d4f8 | 2805 | if (!first) |
5f144b10 | 2806 | RETURN (val); |
e050d4f8 DH |
2807 | else |
2808 | { | |
2809 | arg1 = val; | |
2810 | proc = SCM_CDR (x); | |
2811 | proc = scm_eval_car (proc, env); | |
e050d4f8 DH |
2812 | PREP_APPLY (proc, scm_list_1 (arg1)); |
2813 | ENTER_APPLY; | |
e050d4f8 DH |
2814 | goto evap1; |
2815 | } | |
5f144b10 | 2816 | } |
e050d4f8 | 2817 | |
0f2d19dd | 2818 | |
a570e93a | 2819 | case (SCM_ISYMNUM (SCM_IM_DELAY)): |
ddea3325 | 2820 | RETURN (scm_makprom (scm_closure (SCM_CDR (x), env))); |
a570e93a | 2821 | |
e050d4f8 | 2822 | |
28d52ebb MD |
2823 | case (SCM_ISYMNUM (SCM_IM_FUTURE)): |
2824 | RETURN (scm_i_make_future (scm_closure (SCM_CDR (x), env))); | |
2825 | ||
2826 | ||
c8e1d354 MD |
2827 | /* PLACEHOLDER for case (SCM_ISYMNUM (SCM_IM_DISPATCH)): The |
2828 | following code (type_dispatch) is intended to be the tail | |
2829 | of the case clause for the internal macro | |
2830 | SCM_IM_DISPATCH. Please don't remove it from this | |
2831 | location without discussing it with Mikael | |
2832 | <djurfeldt@nada.kth.se> */ | |
2833 | ||
f12745b6 DH |
2834 | /* The type dispatch code is duplicated below |
2835 | * (c.f. objects.c:scm_mcache_compute_cmethod) since that | |
2836 | * cuts down execution time for type dispatch to 50%. */ | |
dff98306 | 2837 | type_dispatch: /* inputs: x, arg1 */ |
f12745b6 DH |
2838 | /* Type dispatch means to determine from the types of the function |
2839 | * arguments (i. e. the 'signature' of the call), which method from | |
2840 | * a generic function is to be called. This process of selecting | |
2841 | * the right method takes some time. To speed it up, guile uses | |
2842 | * caching: Together with the macro call to dispatch the signatures | |
2843 | * of some previous calls to that generic function from the same | |
2844 | * place are stored (in the code!) in a cache that we call the | |
2845 | * 'method cache'. This is done since it is likely, that | |
2846 | * consecutive calls to dispatch from that position in the code will | |
2847 | * have the same signature. Thus, the type dispatch works as | |
2848 | * follows: First, determine a hash value from the signature of the | |
2849 | * actual arguments. Second, use this hash value as an index to | |
2850 | * find that same signature in the method cache stored at this | |
2851 | * position in the code. If found, you have also found the | |
2852 | * corresponding method that belongs to that signature. If the | |
2853 | * signature is not found in the method cache, you have to perform a | |
2854 | * full search over all signatures stored with the generic | |
2855 | * function. */ | |
2856 | { | |
2857 | unsigned long int specializers; | |
2858 | unsigned long int hash_value; | |
2859 | unsigned long int cache_end_pos; | |
2860 | unsigned long int mask; | |
2861 | SCM method_cache; | |
2862 | ||
2863 | { | |
2864 | SCM z = SCM_CDDR (x); | |
2865 | SCM tmp = SCM_CADR (z); | |
2866 | specializers = SCM_INUM (SCM_CAR (z)); | |
2867 | ||
2868 | /* Compute a hash value for searching the method cache. There | |
2869 | * are two variants for computing the hash value, a (rather) | |
2870 | * complicated one, and a simple one. For the complicated one | |
2871 | * explained below, tmp holds a number that is used in the | |
2872 | * computation. */ | |
2873 | if (SCM_INUMP (tmp)) | |
2874 | { | |
2875 | /* Use the signature of the actual arguments to determine | |
2876 | * the hash value. This is done as follows: Each class has | |
2877 | * an array of random numbers, that are determined when the | |
2878 | * class is created. The integer 'hashset' is an index into | |
2879 | * that array of random numbers. Now, from all classes that | |
2880 | * are part of the signature of the actual arguments, the | |
2881 | * random numbers at index 'hashset' are taken and summed | |
2882 | * up, giving the hash value. The value of 'hashset' is | |
2883 | * stored at the call to dispatch. This allows to have | |
2884 | * different 'formulas' for calculating the hash value at | |
2885 | * different places where dispatch is called. This allows | |
2886 | * to optimize the hash formula at every individual place | |
2887 | * where dispatch is called, such that hopefully the hash | |
2888 | * value that is computed will directly point to the right | |
2889 | * method in the method cache. */ | |
2890 | unsigned long int hashset = SCM_INUM (tmp); | |
2891 | unsigned long int counter = specializers + 1; | |
dff98306 | 2892 | SCM tmp_arg = arg1; |
f12745b6 DH |
2893 | hash_value = 0; |
2894 | while (!SCM_NULLP (tmp_arg) && counter != 0) | |
61364ba6 | 2895 | { |
f12745b6 DH |
2896 | SCM class = scm_class_of (SCM_CAR (tmp_arg)); |
2897 | hash_value += SCM_INSTANCE_HASH (class, hashset); | |
2898 | tmp_arg = SCM_CDR (tmp_arg); | |
2899 | counter--; | |
61364ba6 | 2900 | } |
f12745b6 DH |
2901 | z = SCM_CDDR (z); |
2902 | method_cache = SCM_CADR (z); | |
2903 | mask = SCM_INUM (SCM_CAR (z)); | |
2904 | hash_value &= mask; | |
2905 | cache_end_pos = hash_value; | |
2906 | } | |
2907 | else | |
2908 | { | |
2909 | /* This method of determining the hash value is much | |
2910 | * simpler: Set the hash value to zero and just perform a | |
2911 | * linear search through the method cache. */ | |
2912 | method_cache = tmp; | |
2913 | mask = (unsigned long int) ((long) -1); | |
2914 | hash_value = 0; | |
2915 | cache_end_pos = SCM_VECTOR_LENGTH (method_cache); | |
2916 | } | |
2917 | } | |
61364ba6 | 2918 | |
f12745b6 DH |
2919 | { |
2920 | /* Search the method cache for a method with a matching | |
2921 | * signature. Start the search at position 'hash_value'. The | |
2922 | * hashing implementation uses linear probing for conflict | |
2923 | * resolution, that is, if the signature in question is not | |
2924 | * found at the starting index in the hash table, the next table | |
2925 | * entry is tried, and so on, until in the worst case the whole | |
2926 | * cache has been searched, but still the signature has not been | |
2927 | * found. */ | |
2928 | SCM z; | |
2929 | do | |
2930 | { | |
dff98306 | 2931 | SCM args = arg1; /* list of arguments */ |
f12745b6 DH |
2932 | z = SCM_VELTS (method_cache)[hash_value]; |
2933 | while (!SCM_NULLP (args)) | |
61364ba6 MD |
2934 | { |
2935 | /* More arguments than specifiers => CLASS != ENV */ | |
f12745b6 DH |
2936 | SCM class_of_arg = scm_class_of (SCM_CAR (args)); |
2937 | if (!SCM_EQ_P (class_of_arg, SCM_CAR (z))) | |
61364ba6 | 2938 | goto next_method; |
f12745b6 | 2939 | args = SCM_CDR (args); |
61364ba6 MD |
2940 | z = SCM_CDR (z); |
2941 | } | |
f12745b6 DH |
2942 | /* Fewer arguments than specifiers => CAR != ENV */ |
2943 | if (SCM_NULLP (SCM_CAR (z)) || SCM_CONSP (SCM_CAR (z))) | |
2944 | goto apply_cmethod; | |
2945 | next_method: | |
2946 | hash_value = (hash_value + 1) & mask; | |
2947 | } while (hash_value != cache_end_pos); | |
2948 | ||
2949 | /* No appropriate method was found in the cache. */ | |
dff98306 | 2950 | z = scm_memoize_method (x, arg1); |
f12745b6 | 2951 | |
dff98306 | 2952 | apply_cmethod: /* inputs: z, arg1 */ |
f12745b6 DH |
2953 | { |
2954 | SCM formals = SCM_CMETHOD_FORMALS (z); | |
821f18a4 | 2955 | env = SCM_EXTEND_ENV (formals, arg1, SCM_CMETHOD_ENV (z)); |
f12745b6 DH |
2956 | x = SCM_CMETHOD_BODY (z); |
2957 | goto nontoplevel_begin; | |
2958 | } | |
2959 | } | |
61364ba6 | 2960 | } |
73b64342 | 2961 | |
1d15ecd3 | 2962 | |
ca4be6ea MD |
2963 | case (SCM_ISYMNUM (SCM_IM_SLOT_REF)): |
2964 | x = SCM_CDR (x); | |
1d15ecd3 DH |
2965 | { |
2966 | SCM instance = EVALCAR (x, env); | |
2967 | unsigned long int slot = SCM_INUM (SCM_CADR (x)); | |
2968 | RETURN (SCM_PACK (SCM_STRUCT_DATA (instance) [slot])); | |
2969 | } | |
2970 | ||
2971 | ||
ca4be6ea MD |
2972 | case (SCM_ISYMNUM (SCM_IM_SLOT_SET_X)): |
2973 | x = SCM_CDR (x); | |
1d15ecd3 DH |
2974 | { |
2975 | SCM instance = EVALCAR (x, env); | |
2976 | unsigned long int slot = SCM_INUM (SCM_CADR (x)); | |
2977 | SCM value = EVALCAR (SCM_CDDR (x), env); | |
2978 | SCM_STRUCT_DATA (instance) [slot] = SCM_UNPACK (value); | |
2979 | RETURN (SCM_UNSPECIFIED); | |
2980 | } | |
2981 | ||
c96d76b8 | 2982 | |
22721140 | 2983 | #if SCM_ENABLE_ELISP |
ca4be6ea | 2984 | |
73b64342 | 2985 | case (SCM_ISYMNUM (SCM_IM_NIL_COND)): |
1d15ecd3 DH |
2986 | { |
2987 | SCM test_form = SCM_CDR (x); | |
2988 | x = SCM_CDR (test_form); | |
2989 | while (!SCM_NULL_OR_NIL_P (x)) | |
2990 | { | |
2991 | SCM test_result = EVALCAR (test_form, env); | |
2992 | if (!(SCM_FALSEP (test_result) | |
2993 | || SCM_NULL_OR_NIL_P (test_result))) | |
2994 | { | |
2995 | if (SCM_EQ_P (SCM_CAR (x), SCM_UNSPECIFIED)) | |
2996 | RETURN (test_result); | |
2997 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2998 | goto carloop; | |
2999 | } | |
3000 | else | |
3001 | { | |
3002 | test_form = SCM_CDR (x); | |
3003 | x = SCM_CDR (test_form); | |
3004 | } | |
3005 | } | |
3006 | x = test_form; | |
3007 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
3008 | goto carloop; | |
3009 | } | |
73b64342 | 3010 | |
c96d76b8 | 3011 | #endif /* SCM_ENABLE_ELISP */ |
73b64342 MD |
3012 | |
3013 | case (SCM_ISYMNUM (SCM_IM_BIND)): | |
2e171178 MV |
3014 | { |
3015 | SCM vars, exps, vals; | |
73b64342 | 3016 | |
2e171178 MV |
3017 | x = SCM_CDR (x); |
3018 | vars = SCM_CAAR (x); | |
3019 | exps = SCM_CDAR (x); | |
3020 | ||
3021 | vals = SCM_EOL; | |
3022 | ||
3023 | while (SCM_NIMP (exps)) | |
3024 | { | |
3025 | vals = scm_cons (EVALCAR (exps, env), vals); | |
3026 | exps = SCM_CDR (exps); | |
3027 | } | |
3028 | ||
3029 | scm_swap_bindings (vars, vals); | |
3030 | scm_dynwinds = scm_acons (vars, vals, scm_dynwinds); | |
1d15ecd3 DH |
3031 | |
3032 | /* Ignore all but the last evaluation result. */ | |
3033 | for (x = SCM_CDR (x); !SCM_NULLP (SCM_CDR (x)); x = SCM_CDR (x)) | |
2e171178 | 3034 | { |
1d15ecd3 DH |
3035 | if (SCM_CONSP (SCM_CAR (x))) |
3036 | SCM_CEVAL (SCM_CAR (x), env); | |
2e171178 MV |
3037 | } |
3038 | proc = EVALCAR (x, env); | |
73b64342 | 3039 | |
2e171178 MV |
3040 | scm_dynwinds = SCM_CDR (scm_dynwinds); |
3041 | scm_swap_bindings (vars, vals); | |
73b64342 | 3042 | |
ddea3325 | 3043 | RETURN (proc); |
2e171178 | 3044 | } |
c96d76b8 | 3045 | |
1d15ecd3 | 3046 | |
a513ead3 MV |
3047 | case (SCM_ISYMNUM (SCM_IM_CALL_WITH_VALUES)): |
3048 | { | |
9a069bdd DH |
3049 | SCM producer; |
3050 | ||
3051 | x = SCM_CDR (x); | |
3052 | producer = EVALCAR (x, env); | |
3053 | x = SCM_CDR (x); | |
3054 | proc = EVALCAR (x, env); /* proc is the consumer. */ | |
3055 | arg1 = SCM_APPLY (producer, SCM_EOL, SCM_EOL); | |
dff98306 DH |
3056 | if (SCM_VALUESP (arg1)) |
3057 | arg1 = scm_struct_ref (arg1, SCM_INUM0); | |
a513ead3 | 3058 | else |
dff98306 | 3059 | arg1 = scm_list_1 (arg1); |
9a069bdd DH |
3060 | PREP_APPLY (proc, arg1); |
3061 | goto apply_proc; | |
a513ead3 MV |
3062 | } |
3063 | ||
b7798e10 | 3064 | |
0f2d19dd | 3065 | default: |
ddd8f927 | 3066 | goto evapply; |
0f2d19dd JB |
3067 | } |
3068 | ||
3069 | default: | |
3070 | proc = x; | |
ddd8f927 | 3071 | goto evapply; |
0f2d19dd JB |
3072 | case scm_tc7_vector: |
3073 | case scm_tc7_wvect: | |
22721140 | 3074 | #if SCM_HAVE_ARRAYS |
0f2d19dd JB |
3075 | case scm_tc7_bvect: |
3076 | case scm_tc7_byvect: | |
3077 | case scm_tc7_svect: | |
3078 | case scm_tc7_ivect: | |
3079 | case scm_tc7_uvect: | |
3080 | case scm_tc7_fvect: | |
3081 | case scm_tc7_dvect: | |
3082 | case scm_tc7_cvect: | |
3d05f2e0 | 3083 | #if SCM_SIZEOF_LONG_LONG != 0 |
0f2d19dd | 3084 | case scm_tc7_llvect: |
afe5177e | 3085 | #endif |
0f2d19dd | 3086 | #endif |
534c55a9 | 3087 | case scm_tc7_number: |
0f2d19dd | 3088 | case scm_tc7_string: |
0f2d19dd JB |
3089 | case scm_tc7_smob: |
3090 | case scm_tcs_closures: | |
224822be | 3091 | case scm_tc7_cclo: |
89efbff4 | 3092 | case scm_tc7_pws: |
0f2d19dd | 3093 | case scm_tcs_subrs: |
904a077d | 3094 | case scm_tcs_struct: |
0f2d19dd JB |
3095 | RETURN (x); |
3096 | ||
d22a0ea1 | 3097 | case scm_tc7_variable: |
a130e982 | 3098 | RETURN (SCM_VARIABLE_REF(x)); |
d22a0ea1 | 3099 | |
1b43d24c | 3100 | case SCM_BIT7 (SCM_ILOC00): |
0f2d19dd | 3101 | proc = *scm_ilookup (SCM_CAR (x), env); |
ddd8f927 | 3102 | goto checkmacro; |
b7798e10 | 3103 | |
0f2d19dd | 3104 | case scm_tcs_cons_nimcar: |
e050d4f8 | 3105 | if (SCM_SYMBOLP (SCM_CAR (x))) |
0f2d19dd | 3106 | { |
e050d4f8 | 3107 | SCM orig_sym = SCM_CAR (x); |
b7798e10 DH |
3108 | { |
3109 | SCM *location = scm_lookupcar1 (x, env, 1); | |
3110 | if (location == NULL) | |
3111 | { | |
3112 | /* we have lost the race, start again. */ | |
3113 | goto dispatch; | |
3114 | } | |
3115 | proc = *location; | |
3116 | } | |
f8769b1d | 3117 | |
22a52da1 | 3118 | if (SCM_MACROP (proc)) |
0f2d19dd | 3119 | { |
86d31dfe MV |
3120 | SCM_SETCAR (x, orig_sym); /* Undo memoizing effect of |
3121 | lookupcar */ | |
e050d4f8 | 3122 | handle_a_macro: /* inputs: x, env, proc */ |
368bf056 | 3123 | #ifdef DEVAL |
7c354052 MD |
3124 | /* Set a flag during macro expansion so that macro |
3125 | application frames can be deleted from the backtrace. */ | |
3126 | SCM_SET_MACROEXP (debug); | |
368bf056 | 3127 | #endif |
dff98306 | 3128 | arg1 = SCM_APPLY (SCM_MACRO_CODE (proc), x, |
f8769b1d MV |
3129 | scm_cons (env, scm_listofnull)); |
3130 | ||
7c354052 MD |
3131 | #ifdef DEVAL |
3132 | SCM_CLEAR_MACROEXP (debug); | |
3133 | #endif | |
22a52da1 | 3134 | switch (SCM_MACRO_TYPE (proc)) |
0f2d19dd | 3135 | { |
3b88ed2a | 3136 | case 3: |
0f2d19dd | 3137 | case 2: |
dff98306 DH |
3138 | if (scm_ilength (arg1) <= 0) |
3139 | arg1 = scm_list_2 (SCM_IM_BEGIN, arg1); | |
6dbd0af5 | 3140 | #ifdef DEVAL |
22a52da1 | 3141 | if (!SCM_CLOSUREP (SCM_MACRO_CODE (proc))) |
6dbd0af5 | 3142 | { |
6dbd0af5 | 3143 | SCM_DEFER_INTS; |
dff98306 DH |
3144 | SCM_SETCAR (x, SCM_CAR (arg1)); |
3145 | SCM_SETCDR (x, SCM_CDR (arg1)); | |
6dbd0af5 MD |
3146 | SCM_ALLOW_INTS; |
3147 | goto dispatch; | |
3148 | } | |
3149 | /* Prevent memoizing of debug info expression. */ | |
6203706f MD |
3150 | debug.info->e.exp = scm_cons_source (debug.info->e.exp, |
3151 | SCM_CAR (x), | |
3152 | SCM_CDR (x)); | |
6dbd0af5 | 3153 | #endif |
0f2d19dd | 3154 | SCM_DEFER_INTS; |
dff98306 DH |
3155 | SCM_SETCAR (x, SCM_CAR (arg1)); |
3156 | SCM_SETCDR (x, SCM_CDR (arg1)); | |
0f2d19dd | 3157 | SCM_ALLOW_INTS; |
680516ba DH |
3158 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
3159 | goto loop; | |
3063e30a | 3160 | #if SCM_ENABLE_DEPRECATED == 1 |
0f2d19dd | 3161 | case 1: |
680516ba DH |
3162 | x = arg1; |
3163 | if (SCM_NIMP (x)) | |
3164 | { | |
3165 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
3166 | goto loop; | |
3167 | } | |
3168 | else | |
3169 | RETURN (arg1); | |
3063e30a | 3170 | #endif |
0f2d19dd | 3171 | case 0: |
dff98306 | 3172 | RETURN (arg1); |
0f2d19dd JB |
3173 | } |
3174 | } | |
3175 | } | |
3176 | else | |
3177 | proc = SCM_CEVAL (SCM_CAR (x), env); | |
bd987b8e | 3178 | |
ddd8f927 DH |
3179 | checkmacro: |
3180 | if (SCM_MACROP (proc)) | |
0f2d19dd | 3181 | goto handle_a_macro; |
0f2d19dd JB |
3182 | } |
3183 | ||
3184 | ||
e050d4f8 | 3185 | evapply: /* inputs: x, proc */ |
6dbd0af5 MD |
3186 | PREP_APPLY (proc, SCM_EOL); |
3187 | if (SCM_NULLP (SCM_CDR (x))) { | |
3188 | ENTER_APPLY; | |
89efbff4 | 3189 | evap0: |
ddd8f927 | 3190 | SCM_ASRTGO (!SCM_IMP (proc), badfun); |
0f2d19dd JB |
3191 | switch (SCM_TYP7 (proc)) |
3192 | { /* no arguments given */ | |
3193 | case scm_tc7_subr_0: | |
3194 | RETURN (SCM_SUBRF (proc) ()); | |
3195 | case scm_tc7_subr_1o: | |
3196 | RETURN (SCM_SUBRF (proc) (SCM_UNDEFINED)); | |
3197 | case scm_tc7_lsubr: | |
3198 | RETURN (SCM_SUBRF (proc) (SCM_EOL)); | |
3199 | case scm_tc7_rpsubr: | |
3200 | RETURN (SCM_BOOL_T); | |
3201 | case scm_tc7_asubr: | |
3202 | RETURN (SCM_SUBRF (proc) (SCM_UNDEFINED, SCM_UNDEFINED)); | |
0717dfd8 | 3203 | case scm_tc7_smob: |
68b06924 | 3204 | if (!SCM_SMOB_APPLICABLE_P (proc)) |
0717dfd8 | 3205 | goto badfun; |
68b06924 | 3206 | RETURN (SCM_SMOB_APPLY_0 (proc)); |
0f2d19dd | 3207 | case scm_tc7_cclo: |
dff98306 | 3208 | arg1 = proc; |
0f2d19dd | 3209 | proc = SCM_CCLO_SUBR (proc); |
6dbd0af5 MD |
3210 | #ifdef DEVAL |
3211 | debug.info->a.proc = proc; | |
dff98306 | 3212 | debug.info->a.args = scm_list_1 (arg1); |
6dbd0af5 | 3213 | #endif |
0f2d19dd | 3214 | goto evap1; |
89efbff4 MD |
3215 | case scm_tc7_pws: |
3216 | proc = SCM_PROCEDURE (proc); | |
3217 | #ifdef DEVAL | |
3218 | debug.info->a.proc = proc; | |
3219 | #endif | |
002f1a5d MD |
3220 | if (!SCM_CLOSUREP (proc)) |
3221 | goto evap0; | |
ddd8f927 | 3222 | /* fallthrough */ |
0f2d19dd | 3223 | case scm_tcs_closures: |
ddd8f927 DH |
3224 | { |
3225 | const SCM formals = SCM_CLOSURE_FORMALS (proc); | |
3226 | if (SCM_CONSP (formals)) | |
3227 | goto umwrongnumargs; | |
3228 | x = SCM_CLOSURE_BODY (proc); | |
3229 | env = SCM_EXTEND_ENV (formals, SCM_EOL, SCM_ENV (proc)); | |
3230 | goto nontoplevel_begin; | |
3231 | } | |
904a077d | 3232 | case scm_tcs_struct: |
195847fa MD |
3233 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) |
3234 | { | |
3235 | x = SCM_ENTITY_PROCEDURE (proc); | |
dff98306 | 3236 | arg1 = SCM_EOL; |
195847fa MD |
3237 | goto type_dispatch; |
3238 | } | |
2ca0d207 | 3239 | else if (SCM_I_OPERATORP (proc)) |
da7f71d7 | 3240 | { |
dff98306 | 3241 | arg1 = proc; |
195847fa MD |
3242 | proc = (SCM_I_ENTITYP (proc) |
3243 | ? SCM_ENTITY_PROCEDURE (proc) | |
3244 | : SCM_OPERATOR_PROCEDURE (proc)); | |
da7f71d7 | 3245 | #ifdef DEVAL |
195847fa | 3246 | debug.info->a.proc = proc; |
dff98306 | 3247 | debug.info->a.args = scm_list_1 (arg1); |
da7f71d7 | 3248 | #endif |
ddd8f927 | 3249 | goto evap1; |
da7f71d7 | 3250 | } |
2ca0d207 DH |
3251 | else |
3252 | goto badfun; | |
0f2d19dd JB |
3253 | case scm_tc7_subr_1: |
3254 | case scm_tc7_subr_2: | |
3255 | case scm_tc7_subr_2o: | |
14b18ed6 | 3256 | case scm_tc7_dsubr: |
0f2d19dd JB |
3257 | case scm_tc7_cxr: |
3258 | case scm_tc7_subr_3: | |
3259 | case scm_tc7_lsubr_2: | |
3260 | umwrongnumargs: | |
3261 | unmemocar (x, env); | |
f5bf2977 | 3262 | scm_wrong_num_args (proc); |
0f2d19dd | 3263 | default: |
ddd8f927 DH |
3264 | badfun: |
3265 | scm_misc_error (NULL, "Wrong type to apply: ~S", scm_list_1 (proc)); | |
0f2d19dd | 3266 | } |
6dbd0af5 | 3267 | } |
0f2d19dd JB |
3268 | |
3269 | /* must handle macros by here */ | |
3270 | x = SCM_CDR (x); | |
dff98306 DH |
3271 | if (SCM_CONSP (x)) |
3272 | arg1 = EVALCAR (x, env); | |
680ed4a8 | 3273 | else |
ab1f1094 | 3274 | scm_wrong_num_args (proc); |
6dbd0af5 | 3275 | #ifdef DEVAL |
dff98306 | 3276 | debug.info->a.args = scm_list_1 (arg1); |
6dbd0af5 | 3277 | #endif |
0f2d19dd | 3278 | x = SCM_CDR (x); |
42030fb2 DH |
3279 | { |
3280 | SCM arg2; | |
3281 | if (SCM_NULLP (x)) | |
3282 | { | |
3283 | ENTER_APPLY; | |
3284 | evap1: /* inputs: proc, arg1 */ | |
ddd8f927 | 3285 | SCM_ASRTGO (!SCM_IMP (proc), badfun); |
42030fb2 DH |
3286 | switch (SCM_TYP7 (proc)) |
3287 | { /* have one argument in arg1 */ | |
3288 | case scm_tc7_subr_2o: | |
3289 | RETURN (SCM_SUBRF (proc) (arg1, SCM_UNDEFINED)); | |
3290 | case scm_tc7_subr_1: | |
3291 | case scm_tc7_subr_1o: | |
3292 | RETURN (SCM_SUBRF (proc) (arg1)); | |
14b18ed6 DH |
3293 | case scm_tc7_dsubr: |
3294 | if (SCM_INUMP (arg1)) | |
3295 | { | |
3296 | RETURN (scm_make_real (SCM_DSUBRF (proc) ((double) SCM_INUM (arg1)))); | |
3297 | } | |
3298 | else if (SCM_REALP (arg1)) | |
3299 | { | |
3300 | RETURN (scm_make_real (SCM_DSUBRF (proc) (SCM_REAL_VALUE (arg1)))); | |
3301 | } | |
3302 | else if (SCM_BIGP (arg1)) | |
3303 | { | |
3304 | RETURN (scm_make_real (SCM_DSUBRF (proc) (scm_i_big2dbl (arg1)))); | |
3305 | } | |
3306 | SCM_WTA_DISPATCH_1 (*SCM_SUBR_GENERIC (proc), arg1, | |
3307 | SCM_ARG1, SCM_SYMBOL_CHARS (SCM_SNAME (proc))); | |
42030fb2 | 3308 | case scm_tc7_cxr: |
42030fb2 | 3309 | { |
14b18ed6 DH |
3310 | unsigned char pattern = (scm_t_bits) SCM_SUBRF (proc); |
3311 | do | |
3312 | { | |
3313 | SCM_ASSERT (SCM_CONSP (arg1), arg1, SCM_ARG1, | |
3314 | SCM_SYMBOL_CHARS (SCM_SNAME (proc))); | |
3315 | arg1 = (pattern & 1) ? SCM_CAR (arg1) : SCM_CDR (arg1); | |
3316 | pattern >>= 2; | |
3317 | } while (pattern); | |
42030fb2 | 3318 | RETURN (arg1); |
0f2d19dd | 3319 | } |
42030fb2 DH |
3320 | case scm_tc7_rpsubr: |
3321 | RETURN (SCM_BOOL_T); | |
3322 | case scm_tc7_asubr: | |
3323 | RETURN (SCM_SUBRF (proc) (arg1, SCM_UNDEFINED)); | |
3324 | case scm_tc7_lsubr: | |
0f2d19dd | 3325 | #ifdef DEVAL |
42030fb2 | 3326 | RETURN (SCM_SUBRF (proc) (debug.info->a.args)); |
0f2d19dd | 3327 | #else |
42030fb2 | 3328 | RETURN (SCM_SUBRF (proc) (scm_list_1 (arg1))); |
0f2d19dd | 3329 | #endif |
42030fb2 DH |
3330 | case scm_tc7_smob: |
3331 | if (!SCM_SMOB_APPLICABLE_P (proc)) | |
3332 | goto badfun; | |
3333 | RETURN (SCM_SMOB_APPLY_1 (proc, arg1)); | |
3334 | case scm_tc7_cclo: | |
3335 | arg2 = arg1; | |
3336 | arg1 = proc; | |
3337 | proc = SCM_CCLO_SUBR (proc); | |
6dbd0af5 | 3338 | #ifdef DEVAL |
42030fb2 DH |
3339 | debug.info->a.args = scm_cons (arg1, debug.info->a.args); |
3340 | debug.info->a.proc = proc; | |
6dbd0af5 | 3341 | #endif |
42030fb2 DH |
3342 | goto evap2; |
3343 | case scm_tc7_pws: | |
3344 | proc = SCM_PROCEDURE (proc); | |
89efbff4 | 3345 | #ifdef DEVAL |
42030fb2 | 3346 | debug.info->a.proc = proc; |
89efbff4 | 3347 | #endif |
42030fb2 DH |
3348 | if (!SCM_CLOSUREP (proc)) |
3349 | goto evap1; | |
ddd8f927 | 3350 | /* fallthrough */ |
42030fb2 | 3351 | case scm_tcs_closures: |
ddd8f927 DH |
3352 | { |
3353 | /* clos1: */ | |
3354 | const SCM formals = SCM_CLOSURE_FORMALS (proc); | |
3355 | if (SCM_NULLP (formals) | |
3356 | || (SCM_CONSP (formals) && SCM_CONSP (SCM_CDR (formals)))) | |
3357 | goto umwrongnumargs; | |
3358 | x = SCM_CLOSURE_BODY (proc); | |
0f2d19dd | 3359 | #ifdef DEVAL |
ddd8f927 DH |
3360 | env = SCM_EXTEND_ENV (formals, |
3361 | debug.info->a.args, | |
3362 | SCM_ENV (proc)); | |
0f2d19dd | 3363 | #else |
ddd8f927 DH |
3364 | env = SCM_EXTEND_ENV (formals, |
3365 | scm_list_1 (arg1), | |
3366 | SCM_ENV (proc)); | |
0f2d19dd | 3367 | #endif |
ddd8f927 DH |
3368 | goto nontoplevel_begin; |
3369 | } | |
42030fb2 DH |
3370 | case scm_tcs_struct: |
3371 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) | |
3372 | { | |
3373 | x = SCM_ENTITY_PROCEDURE (proc); | |
f3d2630a | 3374 | #ifdef DEVAL |
42030fb2 | 3375 | arg1 = debug.info->a.args; |
f3d2630a | 3376 | #else |
42030fb2 | 3377 | arg1 = scm_list_1 (arg1); |
f3d2630a | 3378 | #endif |
42030fb2 DH |
3379 | goto type_dispatch; |
3380 | } | |
2ca0d207 | 3381 | else if (SCM_I_OPERATORP (proc)) |
42030fb2 DH |
3382 | { |
3383 | arg2 = arg1; | |
3384 | arg1 = proc; | |
3385 | proc = (SCM_I_ENTITYP (proc) | |
3386 | ? SCM_ENTITY_PROCEDURE (proc) | |
3387 | : SCM_OPERATOR_PROCEDURE (proc)); | |
0c32d76c | 3388 | #ifdef DEVAL |
42030fb2 DH |
3389 | debug.info->a.args = scm_cons (arg1, debug.info->a.args); |
3390 | debug.info->a.proc = proc; | |
0c32d76c | 3391 | #endif |
ddd8f927 | 3392 | goto evap2; |
42030fb2 | 3393 | } |
2ca0d207 DH |
3394 | else |
3395 | goto badfun; | |
42030fb2 DH |
3396 | case scm_tc7_subr_2: |
3397 | case scm_tc7_subr_0: | |
3398 | case scm_tc7_subr_3: | |
3399 | case scm_tc7_lsubr_2: | |
ab1f1094 | 3400 | scm_wrong_num_args (proc); |
42030fb2 DH |
3401 | default: |
3402 | goto badfun; | |
3403 | } | |
3404 | } | |
42030fb2 DH |
3405 | if (SCM_CONSP (x)) |
3406 | arg2 = EVALCAR (x, env); | |
3407 | else | |
ab1f1094 | 3408 | scm_wrong_num_args (proc); |
bd987b8e | 3409 | |
42030fb2 | 3410 | { /* have two or more arguments */ |
6dbd0af5 | 3411 | #ifdef DEVAL |
42030fb2 | 3412 | debug.info->a.args = scm_list_2 (arg1, arg2); |
6dbd0af5 | 3413 | #endif |
42030fb2 DH |
3414 | x = SCM_CDR (x); |
3415 | if (SCM_NULLP (x)) { | |
3416 | ENTER_APPLY; | |
3417 | evap2: | |
ddd8f927 | 3418 | SCM_ASRTGO (!SCM_IMP (proc), badfun); |
42030fb2 DH |
3419 | switch (SCM_TYP7 (proc)) |
3420 | { /* have two arguments */ | |
3421 | case scm_tc7_subr_2: | |
3422 | case scm_tc7_subr_2o: | |
3423 | RETURN (SCM_SUBRF (proc) (arg1, arg2)); | |
3424 | case scm_tc7_lsubr: | |
0f2d19dd | 3425 | #ifdef DEVAL |
42030fb2 | 3426 | RETURN (SCM_SUBRF (proc) (debug.info->a.args)); |
6dbd0af5 | 3427 | #else |
42030fb2 DH |
3428 | RETURN (SCM_SUBRF (proc) (scm_list_2 (arg1, arg2))); |
3429 | #endif | |
3430 | case scm_tc7_lsubr_2: | |
3431 | RETURN (SCM_SUBRF (proc) (arg1, arg2, SCM_EOL)); | |
3432 | case scm_tc7_rpsubr: | |
3433 | case scm_tc7_asubr: | |
3434 | RETURN (SCM_SUBRF (proc) (arg1, arg2)); | |
3435 | case scm_tc7_smob: | |
3436 | if (!SCM_SMOB_APPLICABLE_P (proc)) | |
3437 | goto badfun; | |
3438 | RETURN (SCM_SMOB_APPLY_2 (proc, arg1, arg2)); | |
3439 | cclon: | |
3440 | case scm_tc7_cclo: | |
0f2d19dd | 3441 | #ifdef DEVAL |
42030fb2 DH |
3442 | RETURN (SCM_APPLY (SCM_CCLO_SUBR (proc), |
3443 | scm_cons (proc, debug.info->a.args), | |
3444 | SCM_EOL)); | |
0f2d19dd | 3445 | #else |
42030fb2 DH |
3446 | RETURN (SCM_APPLY (SCM_CCLO_SUBR (proc), |
3447 | scm_cons2 (proc, arg1, | |
3448 | scm_cons (arg2, | |
3449 | scm_eval_args (x, | |
3450 | env, | |
3451 | proc))), | |
3452 | SCM_EOL)); | |
3453 | #endif | |
3454 | case scm_tcs_struct: | |
3455 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) | |
3456 | { | |
3457 | x = SCM_ENTITY_PROCEDURE (proc); | |
3458 | #ifdef DEVAL | |
3459 | arg1 = debug.info->a.args; | |
3460 | #else | |
3461 | arg1 = scm_list_2 (arg1, arg2); | |
6dbd0af5 | 3462 | #endif |
42030fb2 DH |
3463 | goto type_dispatch; |
3464 | } | |
2ca0d207 | 3465 | else if (SCM_I_OPERATORP (proc)) |
42030fb2 DH |
3466 | { |
3467 | operatorn: | |
f3d2630a | 3468 | #ifdef DEVAL |
42030fb2 DH |
3469 | RETURN (SCM_APPLY (SCM_I_ENTITYP (proc) |
3470 | ? SCM_ENTITY_PROCEDURE (proc) | |
3471 | : SCM_OPERATOR_PROCEDURE (proc), | |
3472 | scm_cons (proc, debug.info->a.args), | |
3473 | SCM_EOL)); | |
f3d2630a | 3474 | #else |
42030fb2 DH |
3475 | RETURN (SCM_APPLY (SCM_I_ENTITYP (proc) |
3476 | ? SCM_ENTITY_PROCEDURE (proc) | |
3477 | : SCM_OPERATOR_PROCEDURE (proc), | |
3478 | scm_cons2 (proc, arg1, | |
3479 | scm_cons (arg2, | |
3480 | scm_eval_args (x, | |
3481 | env, | |
3482 | proc))), | |
3483 | SCM_EOL)); | |
f3d2630a | 3484 | #endif |
42030fb2 | 3485 | } |
2ca0d207 DH |
3486 | else |
3487 | goto badfun; | |
42030fb2 | 3488 | case scm_tc7_subr_0: |
14b18ed6 | 3489 | case scm_tc7_dsubr: |
42030fb2 DH |
3490 | case scm_tc7_cxr: |
3491 | case scm_tc7_subr_1o: | |
3492 | case scm_tc7_subr_1: | |
3493 | case scm_tc7_subr_3: | |
ab1f1094 | 3494 | scm_wrong_num_args (proc); |
42030fb2 | 3495 | default: |
9b07e212 | 3496 | goto badfun; |
42030fb2 DH |
3497 | case scm_tc7_pws: |
3498 | proc = SCM_PROCEDURE (proc); | |
3499 | #ifdef DEVAL | |
3500 | debug.info->a.proc = proc; | |
3501 | #endif | |
3502 | if (!SCM_CLOSUREP (proc)) | |
3503 | goto evap2; | |
ddd8f927 | 3504 | /* fallthrough */ |
42030fb2 | 3505 | case scm_tcs_closures: |
ddd8f927 DH |
3506 | { |
3507 | /* clos2: */ | |
3508 | const SCM formals = SCM_CLOSURE_FORMALS (proc); | |
3509 | if (SCM_NULLP (formals) | |
3510 | || (SCM_CONSP (formals) | |
3511 | && (SCM_NULLP (SCM_CDR (formals)) | |
3512 | || (SCM_CONSP (SCM_CDR (formals)) | |
3513 | && SCM_CONSP (SCM_CDDR (formals)))))) | |
3514 | goto umwrongnumargs; | |
0c32d76c | 3515 | #ifdef DEVAL |
ddd8f927 DH |
3516 | env = SCM_EXTEND_ENV (formals, |
3517 | debug.info->a.args, | |
3518 | SCM_ENV (proc)); | |
195847fa | 3519 | #else |
ddd8f927 DH |
3520 | env = SCM_EXTEND_ENV (formals, |
3521 | scm_list_2 (arg1, arg2), | |
3522 | SCM_ENV (proc)); | |
195847fa | 3523 | #endif |
ddd8f927 DH |
3524 | x = SCM_CLOSURE_BODY (proc); |
3525 | goto nontoplevel_begin; | |
3526 | } | |
42030fb2 DH |
3527 | } |
3528 | } | |
42030fb2 | 3529 | if (!SCM_CONSP (x)) |
ab1f1094 | 3530 | scm_wrong_num_args (proc); |
42030fb2 DH |
3531 | #ifdef DEVAL |
3532 | debug.info->a.args = scm_cons2 (arg1, arg2, | |
3533 | deval_args (x, env, proc, | |
3534 | SCM_CDRLOC (SCM_CDR (debug.info->a.args)))); | |
3535 | #endif | |
3536 | ENTER_APPLY; | |
3537 | evap3: | |
ddd8f927 | 3538 | SCM_ASRTGO (!SCM_IMP (proc), badfun); |
42030fb2 DH |
3539 | switch (SCM_TYP7 (proc)) |
3540 | { /* have 3 or more arguments */ | |
3541 | #ifdef DEVAL | |
6dbd0af5 | 3542 | case scm_tc7_subr_3: |
ab1f1094 DH |
3543 | if (!SCM_NULLP (SCM_CDR (x))) |
3544 | scm_wrong_num_args (proc); | |
3545 | else | |
3546 | RETURN (SCM_SUBRF (proc) (arg1, arg2, | |
3547 | SCM_CADDR (debug.info->a.args))); | |
42030fb2 DH |
3548 | case scm_tc7_asubr: |
3549 | arg1 = SCM_SUBRF(proc)(arg1, arg2); | |
3550 | arg2 = SCM_CDDR (debug.info->a.args); | |
3551 | do | |
3552 | { | |
3553 | arg1 = SCM_SUBRF(proc)(arg1, SCM_CAR (arg2)); | |
3554 | arg2 = SCM_CDR (arg2); | |
3555 | } | |
3556 | while (SCM_NIMP (arg2)); | |
3557 | RETURN (arg1); | |
3558 | case scm_tc7_rpsubr: | |
3559 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg1, arg2))) | |
3560 | RETURN (SCM_BOOL_F); | |
3561 | arg1 = SCM_CDDR (debug.info->a.args); | |
3562 | do | |
3563 | { | |
3564 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg2, SCM_CAR (arg1)))) | |
3565 | RETURN (SCM_BOOL_F); | |
3566 | arg2 = SCM_CAR (arg1); | |
3567 | arg1 = SCM_CDR (arg1); | |
3568 | } | |
3569 | while (SCM_NIMP (arg1)); | |
3570 | RETURN (SCM_BOOL_T); | |
3571 | case scm_tc7_lsubr_2: | |
3572 | RETURN (SCM_SUBRF (proc) (arg1, arg2, | |
3573 | SCM_CDDR (debug.info->a.args))); | |
3574 | case scm_tc7_lsubr: | |
3575 | RETURN (SCM_SUBRF (proc) (debug.info->a.args)); | |
3576 | case scm_tc7_smob: | |
3577 | if (!SCM_SMOB_APPLICABLE_P (proc)) | |
3578 | goto badfun; | |
3579 | RETURN (SCM_SMOB_APPLY_3 (proc, arg1, arg2, | |
3580 | SCM_CDDR (debug.info->a.args))); | |
3581 | case scm_tc7_cclo: | |
3582 | goto cclon; | |
002f1a5d MD |
3583 | case scm_tc7_pws: |
3584 | proc = SCM_PROCEDURE (proc); | |
002f1a5d | 3585 | debug.info->a.proc = proc; |
002f1a5d | 3586 | if (!SCM_CLOSUREP (proc)) |
42030fb2 | 3587 | goto evap3; |
ddd8f927 | 3588 | /* fallthrough */ |
6dbd0af5 | 3589 | case scm_tcs_closures: |
ddd8f927 DH |
3590 | { |
3591 | const SCM formals = SCM_CLOSURE_FORMALS (proc); | |
3592 | if (SCM_NULLP (formals) | |
3593 | || (SCM_CONSP (formals) | |
3594 | && (SCM_NULLP (SCM_CDR (formals)) | |
3595 | || (SCM_CONSP (SCM_CDR (formals)) | |
3596 | && scm_badargsp (SCM_CDDR (formals), x))))) | |
3597 | goto umwrongnumargs; | |
3598 | SCM_SET_ARGSREADY (debug); | |
3599 | env = SCM_EXTEND_ENV (formals, | |
3600 | debug.info->a.args, | |
3601 | SCM_ENV (proc)); | |
3602 | x = SCM_CLOSURE_BODY (proc); | |
3603 | goto nontoplevel_begin; | |
3604 | } | |
6dbd0af5 | 3605 | #else /* DEVAL */ |
42030fb2 | 3606 | case scm_tc7_subr_3: |
ab1f1094 DH |
3607 | if (!SCM_NULLP (SCM_CDR (x))) |
3608 | scm_wrong_num_args (proc); | |
3609 | else | |
3610 | RETURN (SCM_SUBRF (proc) (arg1, arg2, EVALCAR (x, env))); | |
42030fb2 DH |
3611 | case scm_tc7_asubr: |
3612 | arg1 = SCM_SUBRF (proc) (arg1, arg2); | |
3613 | do | |
3614 | { | |
3615 | arg1 = SCM_SUBRF(proc)(arg1, EVALCAR(x, env)); | |
3616 | x = SCM_CDR(x); | |
3617 | } | |
3618 | while (SCM_NIMP (x)); | |
3619 | RETURN (arg1); | |
3620 | case scm_tc7_rpsubr: | |
3621 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg1, arg2))) | |
3622 | RETURN (SCM_BOOL_F); | |
3623 | do | |
3624 | { | |
3625 | arg1 = EVALCAR (x, env); | |
3626 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg2, arg1))) | |
3627 | RETURN (SCM_BOOL_F); | |
3628 | arg2 = arg1; | |
3629 | x = SCM_CDR (x); | |
3630 | } | |
3631 | while (SCM_NIMP (x)); | |
3632 | RETURN (SCM_BOOL_T); | |
3633 | case scm_tc7_lsubr_2: | |
3634 | RETURN (SCM_SUBRF (proc) (arg1, arg2, scm_eval_args (x, env, proc))); | |
3635 | case scm_tc7_lsubr: | |
3636 | RETURN (SCM_SUBRF (proc) (scm_cons2 (arg1, | |
3637 | arg2, | |
3638 | scm_eval_args (x, env, proc)))); | |
3639 | case scm_tc7_smob: | |
3640 | if (!SCM_SMOB_APPLICABLE_P (proc)) | |
3641 | goto badfun; | |
3642 | RETURN (SCM_SMOB_APPLY_3 (proc, arg1, arg2, | |
3643 | scm_eval_args (x, env, proc))); | |
3644 | case scm_tc7_cclo: | |
3645 | goto cclon; | |
3646 | case scm_tc7_pws: | |
3647 | proc = SCM_PROCEDURE (proc); | |
3648 | if (!SCM_CLOSUREP (proc)) | |
3649 | goto evap3; | |
ddd8f927 DH |
3650 | /* fallthrough */ |
3651 | case scm_tcs_closures: | |
da7f71d7 | 3652 | { |
ddd8f927 | 3653 | const SCM formals = SCM_CLOSURE_FORMALS (proc); |
42030fb2 DH |
3654 | if (SCM_NULLP (formals) |
3655 | || (SCM_CONSP (formals) | |
3656 | && (SCM_NULLP (SCM_CDR (formals)) | |
3657 | || (SCM_CONSP (SCM_CDR (formals)) | |
3658 | && scm_badargsp (SCM_CDDR (formals), x))))) | |
3659 | goto umwrongnumargs; | |
ddd8f927 DH |
3660 | env = SCM_EXTEND_ENV (formals, |
3661 | scm_cons2 (arg1, | |
3662 | arg2, | |
3663 | scm_eval_args (x, env, proc)), | |
3664 | SCM_ENV (proc)); | |
3665 | x = SCM_CLOSURE_BODY (proc); | |
3666 | goto nontoplevel_begin; | |
da7f71d7 | 3667 | } |
0f2d19dd | 3668 | #endif /* DEVAL */ |
42030fb2 DH |
3669 | case scm_tcs_struct: |
3670 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) | |
3671 | { | |
f3d2630a | 3672 | #ifdef DEVAL |
42030fb2 | 3673 | arg1 = debug.info->a.args; |
f3d2630a | 3674 | #else |
42030fb2 | 3675 | arg1 = scm_cons2 (arg1, arg2, scm_eval_args (x, env, proc)); |
f3d2630a | 3676 | #endif |
42030fb2 DH |
3677 | x = SCM_ENTITY_PROCEDURE (proc); |
3678 | goto type_dispatch; | |
3679 | } | |
2ca0d207 | 3680 | else if (SCM_I_OPERATORP (proc)) |
42030fb2 | 3681 | goto operatorn; |
2ca0d207 DH |
3682 | else |
3683 | goto badfun; | |
42030fb2 DH |
3684 | case scm_tc7_subr_2: |
3685 | case scm_tc7_subr_1o: | |
3686 | case scm_tc7_subr_2o: | |
3687 | case scm_tc7_subr_0: | |
14b18ed6 | 3688 | case scm_tc7_dsubr: |
42030fb2 DH |
3689 | case scm_tc7_cxr: |
3690 | case scm_tc7_subr_1: | |
ab1f1094 | 3691 | scm_wrong_num_args (proc); |
42030fb2 | 3692 | default: |
9b07e212 | 3693 | goto badfun; |
42030fb2 DH |
3694 | } |
3695 | } | |
0f2d19dd JB |
3696 | } |
3697 | #ifdef DEVAL | |
6dbd0af5 | 3698 | exit: |
5132eef0 | 3699 | if (scm_check_exit_p && SCM_TRAPS_P) |
b7ff98dd | 3700 | if (SCM_EXIT_FRAME_P || (SCM_TRACE_P && SCM_TRACED_FRAME_P (debug))) |
6dbd0af5 | 3701 | { |
b7ff98dd MD |
3702 | SCM_CLEAR_TRACED_FRAME (debug); |
3703 | if (SCM_CHEAPTRAPS_P) | |
dff98306 | 3704 | arg1 = scm_make_debugobj (&debug); |
6dbd0af5 MD |
3705 | else |
3706 | { | |
5f144b10 GH |
3707 | int first; |
3708 | SCM val = scm_make_continuation (&first); | |
e050d4f8 | 3709 | |
5f144b10 | 3710 | if (first) |
dff98306 | 3711 | arg1 = val; |
5f144b10 | 3712 | else |
6dbd0af5 | 3713 | { |
5f144b10 | 3714 | proc = val; |
6dbd0af5 MD |
3715 | goto ret; |
3716 | } | |
3717 | } | |
d95c0b76 | 3718 | SCM_TRAPS_P = 0; |
dff98306 | 3719 | scm_call_3 (SCM_EXIT_FRAME_HDLR, scm_sym_exit_frame, arg1, proc); |
d95c0b76 | 3720 | SCM_TRAPS_P = 1; |
6dbd0af5 MD |
3721 | } |
3722 | ret: | |
1646d37b | 3723 | scm_last_debug_frame = debug.prev; |
0f2d19dd JB |
3724 | return proc; |
3725 | #endif | |
3726 | } | |
3727 | ||
6dbd0af5 MD |
3728 | |
3729 | /* SECTION: This code is compiled once. | |
3730 | */ | |
3731 | ||
0f2d19dd JB |
3732 | #ifndef DEVAL |
3733 | ||
fdc28395 | 3734 | \f |
d0b07b5d | 3735 | |
fdc28395 KN |
3736 | /* Simple procedure calls |
3737 | */ | |
3738 | ||
3739 | SCM | |
3740 | scm_call_0 (SCM proc) | |
3741 | { | |
3742 | return scm_apply (proc, SCM_EOL, SCM_EOL); | |
3743 | } | |
3744 | ||
3745 | SCM | |
3746 | scm_call_1 (SCM proc, SCM arg1) | |
3747 | { | |
3748 | return scm_apply (proc, arg1, scm_listofnull); | |
3749 | } | |
3750 | ||
3751 | SCM | |
3752 | scm_call_2 (SCM proc, SCM arg1, SCM arg2) | |
3753 | { | |
3754 | return scm_apply (proc, arg1, scm_cons (arg2, scm_listofnull)); | |
3755 | } | |
3756 | ||
3757 | SCM | |
3758 | scm_call_3 (SCM proc, SCM arg1, SCM arg2, SCM arg3) | |
3759 | { | |
3760 | return scm_apply (proc, arg1, scm_cons2 (arg2, arg3, scm_listofnull)); | |
3761 | } | |
3762 | ||
d95c0b76 NJ |
3763 | SCM |
3764 | scm_call_4 (SCM proc, SCM arg1, SCM arg2, SCM arg3, SCM arg4) | |
3765 | { | |
3766 | return scm_apply (proc, arg1, scm_cons2 (arg2, arg3, | |
3767 | scm_cons (arg4, scm_listofnull))); | |
3768 | } | |
3769 | ||
fdc28395 KN |
3770 | /* Simple procedure applies |
3771 | */ | |
3772 | ||
3773 | SCM | |
3774 | scm_apply_0 (SCM proc, SCM args) | |
3775 | { | |
3776 | return scm_apply (proc, args, SCM_EOL); | |
3777 | } | |
3778 | ||
3779 | SCM | |
3780 | scm_apply_1 (SCM proc, SCM arg1, SCM args) | |
3781 | { | |
3782 | return scm_apply (proc, scm_cons (arg1, args), SCM_EOL); | |
3783 | } | |
3784 | ||
3785 | SCM | |
3786 | scm_apply_2 (SCM proc, SCM arg1, SCM arg2, SCM args) | |
3787 | { | |
3788 | return scm_apply (proc, scm_cons2 (arg1, arg2, args), SCM_EOL); | |
3789 | } | |
3790 | ||
3791 | SCM | |
3792 | scm_apply_3 (SCM proc, SCM arg1, SCM arg2, SCM arg3, SCM args) | |
3793 | { | |
3794 | return scm_apply (proc, scm_cons (arg1, scm_cons2 (arg2, arg3, args)), | |
3795 | SCM_EOL); | |
3796 | } | |
3797 | ||
82a2622a | 3798 | /* This code processes the arguments to apply: |
b145c172 JB |
3799 | |
3800 | (apply PROC ARG1 ... ARGS) | |
3801 | ||
82a2622a JB |
3802 | Given a list (ARG1 ... ARGS), this function conses the ARG1 |
3803 | ... arguments onto the front of ARGS, and returns the resulting | |
3804 | list. Note that ARGS is a list; thus, the argument to this | |
3805 | function is a list whose last element is a list. | |
3806 | ||
3807 | Apply calls this function, and applies PROC to the elements of the | |
b145c172 JB |
3808 | result. apply:nconc2last takes care of building the list of |
3809 | arguments, given (ARG1 ... ARGS). | |
3810 | ||
82a2622a JB |
3811 | Rather than do new consing, apply:nconc2last destroys its argument. |
3812 | On that topic, this code came into my care with the following | |
3813 | beautifully cryptic comment on that topic: "This will only screw | |
3814 | you if you do (scm_apply scm_apply '( ... ))" If you know what | |
3815 | they're referring to, send me a patch to this comment. */ | |
b145c172 | 3816 | |
3b3b36dd | 3817 | SCM_DEFINE (scm_nconc2last, "apply:nconc2last", 1, 0, 0, |
b3f26b14 MG |
3818 | (SCM lst), |
3819 | "Given a list (@var{arg1} @dots{} @var{args}), this function\n" | |
3820 | "conses the @var{arg1} @dots{} arguments onto the front of\n" | |
3821 | "@var{args}, and returns the resulting list. Note that\n" | |
3822 | "@var{args} is a list; thus, the argument to this function is\n" | |
3823 | "a list whose last element is a list.\n" | |
3824 | "Note: Rather than do new consing, @code{apply:nconc2last}\n" | |
3825 | "destroys its argument, so use with care.") | |
1bbd0b84 | 3826 | #define FUNC_NAME s_scm_nconc2last |
0f2d19dd JB |
3827 | { |
3828 | SCM *lloc; | |
34d19ef6 | 3829 | SCM_VALIDATE_NONEMPTYLIST (1, lst); |
0f2d19dd | 3830 | lloc = &lst; |
c96d76b8 NJ |
3831 | while (!SCM_NULLP (SCM_CDR (*lloc))) /* Perhaps should be |
3832 | SCM_NULL_OR_NIL_P, but not | |
3833 | needed in 99.99% of cases, | |
3834 | and it could seriously hurt | |
3835 | performance. - Neil */ | |
a23afe53 | 3836 | lloc = SCM_CDRLOC (*lloc); |
1bbd0b84 | 3837 | SCM_ASSERT (scm_ilength (SCM_CAR (*lloc)) >= 0, lst, SCM_ARG1, FUNC_NAME); |
0f2d19dd JB |
3838 | *lloc = SCM_CAR (*lloc); |
3839 | return lst; | |
3840 | } | |
1bbd0b84 | 3841 | #undef FUNC_NAME |
0f2d19dd JB |
3842 | |
3843 | #endif /* !DEVAL */ | |
3844 | ||
6dbd0af5 MD |
3845 | |
3846 | /* SECTION: When DEVAL is defined this code yields scm_dapply. | |
3847 | * It is compiled twice. | |
3848 | */ | |
3849 | ||
0f2d19dd | 3850 | #if 0 |
0f2d19dd | 3851 | SCM |
6e8d25a6 | 3852 | scm_apply (SCM proc, SCM arg1, SCM args) |
0f2d19dd JB |
3853 | {} |
3854 | #endif | |
3855 | ||
3856 | #if 0 | |
0f2d19dd | 3857 | SCM |
6e8d25a6 | 3858 | scm_dapply (SCM proc, SCM arg1, SCM args) |
d0b07b5d | 3859 | {} |
0f2d19dd JB |
3860 | #endif |
3861 | ||
1cc91f1b | 3862 | |
82a2622a JB |
3863 | /* Apply a function to a list of arguments. |
3864 | ||
3865 | This function is exported to the Scheme level as taking two | |
3866 | required arguments and a tail argument, as if it were: | |
3867 | (lambda (proc arg1 . args) ...) | |
3868 | Thus, if you just have a list of arguments to pass to a procedure, | |
3869 | pass the list as ARG1, and '() for ARGS. If you have some fixed | |
3870 | args, pass the first as ARG1, then cons any remaining fixed args | |
3871 | onto the front of your argument list, and pass that as ARGS. */ | |
3872 | ||
0f2d19dd | 3873 | SCM |
1bbd0b84 | 3874 | SCM_APPLY (SCM proc, SCM arg1, SCM args) |
0f2d19dd | 3875 | { |
0f2d19dd | 3876 | #ifdef DEVAL |
92c2555f MV |
3877 | scm_t_debug_frame debug; |
3878 | scm_t_debug_info debug_vect_body; | |
1646d37b | 3879 | debug.prev = scm_last_debug_frame; |
b7ff98dd | 3880 | debug.status = SCM_APPLYFRAME; |
c0ab1b8d | 3881 | debug.vect = &debug_vect_body; |
6dbd0af5 MD |
3882 | debug.vect[0].a.proc = proc; |
3883 | debug.vect[0].a.args = SCM_EOL; | |
1646d37b | 3884 | scm_last_debug_frame = &debug; |
0f2d19dd | 3885 | #else |
b7ff98dd | 3886 | if (SCM_DEBUGGINGP) |
0f2d19dd | 3887 | return scm_dapply (proc, arg1, args); |
0f2d19dd JB |
3888 | #endif |
3889 | ||
3890 | SCM_ASRTGO (SCM_NIMP (proc), badproc); | |
82a2622a JB |
3891 | |
3892 | /* If ARGS is the empty list, then we're calling apply with only two | |
3893 | arguments --- ARG1 is the list of arguments for PROC. Whatever | |
3894 | the case, futz with things so that ARG1 is the first argument to | |
3895 | give to PROC (or SCM_UNDEFINED if no args), and ARGS contains the | |
30000774 JB |
3896 | rest. |
3897 | ||
3898 | Setting the debug apply frame args this way is pretty messy. | |
3899 | Perhaps we should store arg1 and args directly in the frame as | |
3900 | received, and let scm_frame_arguments unpack them, because that's | |
3901 | a relatively rare operation. This works for now; if the Guile | |
3902 | developer archives are still around, see Mikael's post of | |
3903 | 11-Apr-97. */ | |
0f2d19dd JB |
3904 | if (SCM_NULLP (args)) |
3905 | { | |
3906 | if (SCM_NULLP (arg1)) | |
30000774 JB |
3907 | { |
3908 | arg1 = SCM_UNDEFINED; | |
3909 | #ifdef DEVAL | |
3910 | debug.vect[0].a.args = SCM_EOL; | |
3911 | #endif | |
3912 | } | |
0f2d19dd JB |
3913 | else |
3914 | { | |
30000774 JB |
3915 | #ifdef DEVAL |
3916 | debug.vect[0].a.args = arg1; | |
3917 | #endif | |
0f2d19dd JB |
3918 | args = SCM_CDR (arg1); |
3919 | arg1 = SCM_CAR (arg1); | |
3920 | } | |
3921 | } | |
3922 | else | |
3923 | { | |
0f2d19dd | 3924 | args = scm_nconc2last (args); |
30000774 JB |
3925 | #ifdef DEVAL |
3926 | debug.vect[0].a.args = scm_cons (arg1, args); | |
3927 | #endif | |
0f2d19dd | 3928 | } |
0f2d19dd | 3929 | #ifdef DEVAL |
b6d75948 | 3930 | if (SCM_ENTER_FRAME_P && SCM_TRAPS_P) |
6dbd0af5 MD |
3931 | { |
3932 | SCM tmp; | |
b7ff98dd | 3933 | if (SCM_CHEAPTRAPS_P) |
c0ab1b8d | 3934 | tmp = scm_make_debugobj (&debug); |
6dbd0af5 MD |
3935 | else |
3936 | { | |
5f144b10 GH |
3937 | int first; |
3938 | ||
3939 | tmp = scm_make_continuation (&first); | |
3940 | if (!first) | |
6dbd0af5 MD |
3941 | goto entap; |
3942 | } | |
d95c0b76 NJ |
3943 | SCM_TRAPS_P = 0; |
3944 | scm_call_2 (SCM_ENTER_FRAME_HDLR, scm_sym_enter_frame, tmp); | |
3945 | SCM_TRAPS_P = 1; | |
6dbd0af5 MD |
3946 | } |
3947 | entap: | |
3948 | ENTER_APPLY; | |
3949 | #endif | |
6dbd0af5 | 3950 | tail: |
0f2d19dd JB |
3951 | switch (SCM_TYP7 (proc)) |
3952 | { | |
3953 | case scm_tc7_subr_2o: | |
3954 | args = SCM_NULLP (args) ? SCM_UNDEFINED : SCM_CAR (args); | |
ddea3325 | 3955 | RETURN (SCM_SUBRF (proc) (arg1, args)); |
0f2d19dd | 3956 | case scm_tc7_subr_2: |
ab1f1094 DH |
3957 | if (SCM_NULLP (args) || !SCM_NULLP (SCM_CDR (args))) |
3958 | scm_wrong_num_args (proc); | |
0f2d19dd | 3959 | args = SCM_CAR (args); |
ddea3325 | 3960 | RETURN (SCM_SUBRF (proc) (arg1, args)); |
0f2d19dd | 3961 | case scm_tc7_subr_0: |
ab1f1094 DH |
3962 | if (!SCM_UNBNDP (arg1)) |
3963 | scm_wrong_num_args (proc); | |
3964 | else | |
3965 | RETURN (SCM_SUBRF (proc) ()); | |
0f2d19dd | 3966 | case scm_tc7_subr_1: |
ab1f1094 DH |
3967 | if (SCM_UNBNDP (arg1)) |
3968 | scm_wrong_num_args (proc); | |
0f2d19dd | 3969 | case scm_tc7_subr_1o: |
ab1f1094 DH |
3970 | if (!SCM_NULLP (args)) |
3971 | scm_wrong_num_args (proc); | |
3972 | else | |
3973 | RETURN (SCM_SUBRF (proc) (arg1)); | |
14b18ed6 DH |
3974 | case scm_tc7_dsubr: |
3975 | if (SCM_UNBNDP (arg1) || !SCM_NULLP (args)) | |
3976 | scm_wrong_num_args (proc); | |
3977 | if (SCM_INUMP (arg1)) | |
3978 | { | |
3979 | RETURN (scm_make_real (SCM_DSUBRF (proc) ((double) SCM_INUM (arg1)))); | |
3980 | } | |
3981 | else if (SCM_REALP (arg1)) | |
3982 | { | |
3983 | RETURN (scm_make_real (SCM_DSUBRF (proc) (SCM_REAL_VALUE (arg1)))); | |
3984 | } | |
3985 | else if (SCM_BIGP (arg1)) | |
3986 | RETURN (scm_make_real (SCM_DSUBRF (proc) (scm_i_big2dbl (arg1)))); | |
3987 | SCM_WTA_DISPATCH_1 (*SCM_SUBR_GENERIC (proc), arg1, | |
3988 | SCM_ARG1, SCM_SYMBOL_CHARS (SCM_SNAME (proc))); | |
0f2d19dd | 3989 | case scm_tc7_cxr: |
ab1f1094 DH |
3990 | if (SCM_UNBNDP (arg1) || !SCM_NULLP (args)) |
3991 | scm_wrong_num_args (proc); | |
0f2d19dd | 3992 | { |
14b18ed6 DH |
3993 | unsigned char pattern = (scm_t_bits) SCM_SUBRF (proc); |
3994 | do | |
3995 | { | |
3996 | SCM_ASSERT (SCM_CONSP (arg1), arg1, SCM_ARG1, | |
3997 | SCM_SYMBOL_CHARS (SCM_SNAME (proc))); | |
3998 | arg1 = (pattern & 1) ? SCM_CAR (arg1) : SCM_CDR (arg1); | |
3999 | pattern >>= 2; | |
4000 | } while (pattern); | |
4001 | RETURN (arg1); | |
0f2d19dd JB |
4002 | } |
4003 | case scm_tc7_subr_3: | |
ab1f1094 DH |
4004 | if (SCM_NULLP (args) |
4005 | || SCM_NULLP (SCM_CDR (args)) | |
4006 | || !SCM_NULLP (SCM_CDDR (args))) | |
4007 | scm_wrong_num_args (proc); | |
4008 | else | |
4009 | RETURN (SCM_SUBRF (proc) (arg1, SCM_CAR (args), SCM_CADR (args))); | |
0f2d19dd JB |
4010 | case scm_tc7_lsubr: |
4011 | #ifdef DEVAL | |
ddea3325 | 4012 | RETURN (SCM_SUBRF (proc) (SCM_UNBNDP (arg1) ? SCM_EOL : debug.vect[0].a.args)); |
0f2d19dd | 4013 | #else |
ddea3325 | 4014 | RETURN (SCM_SUBRF (proc) (SCM_UNBNDP (arg1) ? SCM_EOL : scm_cons (arg1, args))); |
0f2d19dd JB |
4015 | #endif |
4016 | case scm_tc7_lsubr_2: | |
ab1f1094 DH |
4017 | if (!SCM_CONSP (args)) |
4018 | scm_wrong_num_args (proc); | |
4019 | else | |
4020 | RETURN (SCM_SUBRF (proc) (arg1, SCM_CAR (args), SCM_CDR (args))); | |
0f2d19dd JB |
4021 | case scm_tc7_asubr: |
4022 | if (SCM_NULLP (args)) | |
ddea3325 | 4023 | RETURN (SCM_SUBRF (proc) (arg1, SCM_UNDEFINED)); |
0f2d19dd JB |
4024 | while (SCM_NIMP (args)) |
4025 | { | |
4026 | SCM_ASSERT (SCM_CONSP (args), args, SCM_ARG2, "apply"); | |
4027 | arg1 = SCM_SUBRF (proc) (arg1, SCM_CAR (args)); | |
4028 | args = SCM_CDR (args); | |
4029 | } | |
4030 | RETURN (arg1); | |
4031 | case scm_tc7_rpsubr: | |
4032 | if (SCM_NULLP (args)) | |
4033 | RETURN (SCM_BOOL_T); | |
4034 | while (SCM_NIMP (args)) | |
4035 | { | |
4036 | SCM_ASSERT (SCM_CONSP (args), args, SCM_ARG2, "apply"); | |
4037 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg1, SCM_CAR (args)))) | |
4038 | RETURN (SCM_BOOL_F); | |
4039 | arg1 = SCM_CAR (args); | |
4040 | args = SCM_CDR (args); | |
4041 | } | |
4042 | RETURN (SCM_BOOL_T); | |
4043 | case scm_tcs_closures: | |
4044 | #ifdef DEVAL | |
6dbd0af5 | 4045 | arg1 = (SCM_UNBNDP (arg1) ? SCM_EOL : debug.vect[0].a.args); |
0f2d19dd JB |
4046 | #else |
4047 | arg1 = (SCM_UNBNDP (arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
4048 | #endif | |
726d810a | 4049 | if (scm_badargsp (SCM_CLOSURE_FORMALS (proc), arg1)) |
ab1f1094 | 4050 | scm_wrong_num_args (proc); |
1609038c MD |
4051 | |
4052 | /* Copy argument list */ | |
4053 | if (SCM_IMP (arg1)) | |
4054 | args = arg1; | |
4055 | else | |
4056 | { | |
4057 | SCM tl = args = scm_cons (SCM_CAR (arg1), SCM_UNSPECIFIED); | |
05b15362 | 4058 | for (arg1 = SCM_CDR (arg1); SCM_CONSP (arg1); arg1 = SCM_CDR (arg1)) |
1609038c | 4059 | { |
05b15362 | 4060 | SCM_SETCDR (tl, scm_cons (SCM_CAR (arg1), SCM_UNSPECIFIED)); |
1609038c MD |
4061 | tl = SCM_CDR (tl); |
4062 | } | |
4063 | SCM_SETCDR (tl, arg1); | |
4064 | } | |
4065 | ||
821f18a4 DH |
4066 | args = SCM_EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), |
4067 | args, | |
4068 | SCM_ENV (proc)); | |
f9450cdb | 4069 | proc = SCM_CLOSURE_BODY (proc); |
e791c18f | 4070 | again: |
05b15362 DH |
4071 | arg1 = SCM_CDR (proc); |
4072 | while (!SCM_NULLP (arg1)) | |
2ddb0920 MD |
4073 | { |
4074 | if (SCM_IMP (SCM_CAR (proc))) | |
4075 | { | |
4076 | if (SCM_ISYMP (SCM_CAR (proc))) | |
4077 | { | |
28d52ebb | 4078 | scm_rec_mutex_lock (&source_mutex); |
9bc4701c MD |
4079 | /* check for race condition */ |
4080 | if (SCM_ISYMP (SCM_CAR (proc))) | |
4081 | proc = scm_m_expand_body (proc, args); | |
28d52ebb | 4082 | scm_rec_mutex_unlock (&source_mutex); |
e791c18f | 4083 | goto again; |
2ddb0920 | 4084 | } |
5280aaca | 4085 | else |
17fa3fcf | 4086 | SCM_VALIDATE_NON_EMPTY_COMBINATION (SCM_CAR (proc)); |
2ddb0920 MD |
4087 | } |
4088 | else | |
e791c18f MD |
4089 | SCM_CEVAL (SCM_CAR (proc), args); |
4090 | proc = arg1; | |
05b15362 | 4091 | arg1 = SCM_CDR (proc); |
2ddb0920 | 4092 | } |
e791c18f | 4093 | RETURN (EVALCAR (proc, args)); |
0717dfd8 | 4094 | case scm_tc7_smob: |
68b06924 | 4095 | if (!SCM_SMOB_APPLICABLE_P (proc)) |
0717dfd8 | 4096 | goto badproc; |
afa38f6e | 4097 | if (SCM_UNBNDP (arg1)) |
ddea3325 | 4098 | RETURN (SCM_SMOB_APPLY_0 (proc)); |
afa38f6e | 4099 | else if (SCM_NULLP (args)) |
ddea3325 | 4100 | RETURN (SCM_SMOB_APPLY_1 (proc, arg1)); |
0717dfd8 | 4101 | else if (SCM_NULLP (SCM_CDR (args))) |
ddea3325 | 4102 | RETURN (SCM_SMOB_APPLY_2 (proc, arg1, SCM_CAR (args))); |
0717dfd8 | 4103 | else |
68b06924 | 4104 | RETURN (SCM_SMOB_APPLY_3 (proc, arg1, SCM_CAR (args), SCM_CDR (args))); |
0f2d19dd JB |
4105 | case scm_tc7_cclo: |
4106 | #ifdef DEVAL | |
6dbd0af5 MD |
4107 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : debug.vect[0].a.args); |
4108 | arg1 = proc; | |
4109 | proc = SCM_CCLO_SUBR (proc); | |
4110 | debug.vect[0].a.proc = proc; | |
4111 | debug.vect[0].a.args = scm_cons (arg1, args); | |
0f2d19dd JB |
4112 | #else |
4113 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
0f2d19dd JB |
4114 | arg1 = proc; |
4115 | proc = SCM_CCLO_SUBR (proc); | |
6dbd0af5 | 4116 | #endif |
0f2d19dd | 4117 | goto tail; |
89efbff4 MD |
4118 | case scm_tc7_pws: |
4119 | proc = SCM_PROCEDURE (proc); | |
4120 | #ifdef DEVAL | |
4121 | debug.vect[0].a.proc = proc; | |
4122 | #endif | |
4123 | goto tail; | |
904a077d | 4124 | case scm_tcs_struct: |
f3d2630a MD |
4125 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) |
4126 | { | |
4127 | #ifdef DEVAL | |
4128 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : debug.vect[0].a.args); | |
4129 | #else | |
4130 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
4131 | #endif | |
195847fa | 4132 | RETURN (scm_apply_generic (proc, args)); |
f3d2630a | 4133 | } |
2ca0d207 | 4134 | else if (SCM_I_OPERATORP (proc)) |
da7f71d7 | 4135 | { |
504d99c5 | 4136 | /* operator */ |
da7f71d7 MD |
4137 | #ifdef DEVAL |
4138 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : debug.vect[0].a.args); | |
4139 | #else | |
4140 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
4141 | #endif | |
4142 | arg1 = proc; | |
195847fa MD |
4143 | proc = (SCM_I_ENTITYP (proc) |
4144 | ? SCM_ENTITY_PROCEDURE (proc) | |
4145 | : SCM_OPERATOR_PROCEDURE (proc)); | |
da7f71d7 MD |
4146 | #ifdef DEVAL |
4147 | debug.vect[0].a.proc = proc; | |
4148 | debug.vect[0].a.args = scm_cons (arg1, args); | |
4149 | #endif | |
195847fa MD |
4150 | if (SCM_NIMP (proc)) |
4151 | goto tail; | |
4152 | else | |
4153 | goto badproc; | |
da7f71d7 | 4154 | } |
2ca0d207 DH |
4155 | else |
4156 | goto badproc; | |
0f2d19dd JB |
4157 | default: |
4158 | badproc: | |
db4b4ca6 | 4159 | scm_wrong_type_arg ("apply", SCM_ARG1, proc); |
0f2d19dd JB |
4160 | } |
4161 | #ifdef DEVAL | |
6dbd0af5 | 4162 | exit: |
5132eef0 | 4163 | if (scm_check_exit_p && SCM_TRAPS_P) |
b7ff98dd | 4164 | if (SCM_EXIT_FRAME_P || (SCM_TRACE_P && SCM_TRACED_FRAME_P (debug))) |
6dbd0af5 | 4165 | { |
b7ff98dd MD |
4166 | SCM_CLEAR_TRACED_FRAME (debug); |
4167 | if (SCM_CHEAPTRAPS_P) | |
c0ab1b8d | 4168 | arg1 = scm_make_debugobj (&debug); |
6dbd0af5 MD |
4169 | else |
4170 | { | |
5f144b10 GH |
4171 | int first; |
4172 | SCM val = scm_make_continuation (&first); | |
4173 | ||
4174 | if (first) | |
4175 | arg1 = val; | |
4176 | else | |
6dbd0af5 | 4177 | { |
5f144b10 | 4178 | proc = val; |
6dbd0af5 MD |
4179 | goto ret; |
4180 | } | |
4181 | } | |
d95c0b76 NJ |
4182 | SCM_TRAPS_P = 0; |
4183 | scm_call_3 (SCM_EXIT_FRAME_HDLR, scm_sym_exit_frame, arg1, proc); | |
4184 | SCM_TRAPS_P = 1; | |
6dbd0af5 MD |
4185 | } |
4186 | ret: | |
1646d37b | 4187 | scm_last_debug_frame = debug.prev; |
0f2d19dd JB |
4188 | return proc; |
4189 | #endif | |
4190 | } | |
4191 | ||
6dbd0af5 MD |
4192 | |
4193 | /* SECTION: The rest of this file is only read once. | |
4194 | */ | |
4195 | ||
0f2d19dd JB |
4196 | #ifndef DEVAL |
4197 | ||
504d99c5 MD |
4198 | /* Trampolines |
4199 | * | |
4200 | * Trampolines make it possible to move procedure application dispatch | |
4201 | * outside inner loops. The motivation was clean implementation of | |
4202 | * efficient replacements of R5RS primitives in SRFI-1. | |
4203 | * | |
4204 | * The semantics is clear: scm_trampoline_N returns an optimized | |
4205 | * version of scm_call_N (or NULL if the procedure isn't applicable | |
4206 | * on N args). | |
4207 | * | |
4208 | * Applying the optimization to map and for-each increased efficiency | |
4209 | * noticeably. For example, (map abs ls) is now 8 times faster than | |
4210 | * before. | |
4211 | */ | |
4212 | ||
756414cf MD |
4213 | static SCM |
4214 | call_subr0_0 (SCM proc) | |
4215 | { | |
4216 | return SCM_SUBRF (proc) (); | |
4217 | } | |
4218 | ||
4219 | static SCM | |
4220 | call_subr1o_0 (SCM proc) | |
4221 | { | |
4222 | return SCM_SUBRF (proc) (SCM_UNDEFINED); | |
4223 | } | |
4224 | ||
4225 | static SCM | |
4226 | call_lsubr_0 (SCM proc) | |
4227 | { | |
4228 | return SCM_SUBRF (proc) (SCM_EOL); | |
4229 | } | |
4230 | ||
4231 | SCM | |
4232 | scm_i_call_closure_0 (SCM proc) | |
4233 | { | |
6a3f13f0 DH |
4234 | const SCM env = SCM_EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), |
4235 | SCM_EOL, | |
4236 | SCM_ENV (proc)); | |
4237 | const SCM result = scm_eval_body (SCM_CLOSURE_BODY (proc), env); | |
d0b07b5d | 4238 | return result; |
756414cf MD |
4239 | } |
4240 | ||
4241 | scm_t_trampoline_0 | |
4242 | scm_trampoline_0 (SCM proc) | |
4243 | { | |
4244 | if (SCM_IMP (proc)) | |
d0b07b5d | 4245 | return NULL; |
756414cf MD |
4246 | if (SCM_DEBUGGINGP) |
4247 | return scm_call_0; | |
4248 | switch (SCM_TYP7 (proc)) | |
4249 | { | |
4250 | case scm_tc7_subr_0: | |
4251 | return call_subr0_0; | |
4252 | case scm_tc7_subr_1o: | |
4253 | return call_subr1o_0; | |
4254 | case scm_tc7_lsubr: | |
4255 | return call_lsubr_0; | |
4256 | case scm_tcs_closures: | |
4257 | { | |
4258 | SCM formals = SCM_CLOSURE_FORMALS (proc); | |
4b612c5b | 4259 | if (SCM_NULLP (formals) || !SCM_CONSP (formals)) |
756414cf MD |
4260 | return scm_i_call_closure_0; |
4261 | else | |
d0b07b5d | 4262 | return NULL; |
756414cf MD |
4263 | } |
4264 | case scm_tcs_struct: | |
4265 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) | |
4266 | return scm_call_generic_0; | |
2ca0d207 DH |
4267 | else if (SCM_I_OPERATORP (proc)) |
4268 | return scm_call_0; | |
4269 | return NULL; | |
756414cf MD |
4270 | case scm_tc7_smob: |
4271 | if (SCM_SMOB_APPLICABLE_P (proc)) | |
4272 | return SCM_SMOB_DESCRIPTOR (proc).apply_0; | |
4273 | else | |
d0b07b5d | 4274 | return NULL; |
756414cf MD |
4275 | case scm_tc7_asubr: |
4276 | case scm_tc7_rpsubr: | |
4277 | case scm_tc7_cclo: | |
4278 | case scm_tc7_pws: | |
4279 | return scm_call_0; | |
4280 | default: | |
d0b07b5d | 4281 | return NULL; /* not applicable on one arg */ |
756414cf MD |
4282 | } |
4283 | } | |
4284 | ||
504d99c5 MD |
4285 | static SCM |
4286 | call_subr1_1 (SCM proc, SCM arg1) | |
4287 | { | |
4288 | return SCM_SUBRF (proc) (arg1); | |
4289 | } | |
4290 | ||
9ed24633 MD |
4291 | static SCM |
4292 | call_subr2o_1 (SCM proc, SCM arg1) | |
4293 | { | |
4294 | return SCM_SUBRF (proc) (arg1, SCM_UNDEFINED); | |
4295 | } | |
4296 | ||
504d99c5 MD |
4297 | static SCM |
4298 | call_lsubr_1 (SCM proc, SCM arg1) | |
4299 | { | |
4300 | return SCM_SUBRF (proc) (scm_list_1 (arg1)); | |
4301 | } | |
4302 | ||
4303 | static SCM | |
4304 | call_dsubr_1 (SCM proc, SCM arg1) | |
4305 | { | |
4306 | if (SCM_INUMP (arg1)) | |
4307 | { | |
4308 | RETURN (scm_make_real (SCM_DSUBRF (proc) ((double) SCM_INUM (arg1)))); | |
4309 | } | |
4310 | else if (SCM_REALP (arg1)) | |
4311 | { | |
4312 | RETURN (scm_make_real (SCM_DSUBRF (proc) (SCM_REAL_VALUE (arg1)))); | |
4313 | } | |
504d99c5 MD |
4314 | else if (SCM_BIGP (arg1)) |
4315 | RETURN (scm_make_real (SCM_DSUBRF (proc) (scm_i_big2dbl (arg1)))); | |
504d99c5 MD |
4316 | SCM_WTA_DISPATCH_1 (*SCM_SUBR_GENERIC (proc), arg1, |
4317 | SCM_ARG1, SCM_SYMBOL_CHARS (SCM_SNAME (proc))); | |
4318 | } | |
4319 | ||
4320 | static SCM | |
4321 | call_cxr_1 (SCM proc, SCM arg1) | |
4322 | { | |
14b18ed6 DH |
4323 | unsigned char pattern = (scm_t_bits) SCM_SUBRF (proc); |
4324 | do | |
4325 | { | |
4326 | SCM_ASSERT (SCM_CONSP (arg1), arg1, SCM_ARG1, | |
4327 | SCM_SYMBOL_CHARS (SCM_SNAME (proc))); | |
4328 | arg1 = (pattern & 1) ? SCM_CAR (arg1) : SCM_CDR (arg1); | |
4329 | pattern >>= 2; | |
4330 | } while (pattern); | |
4331 | return arg1; | |
504d99c5 MD |
4332 | } |
4333 | ||
4334 | static SCM | |
4335 | call_closure_1 (SCM proc, SCM arg1) | |
4336 | { | |
6a3f13f0 DH |
4337 | const SCM env = SCM_EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), |
4338 | scm_list_1 (arg1), | |
4339 | SCM_ENV (proc)); | |
4340 | const SCM result = scm_eval_body (SCM_CLOSURE_BODY (proc), env); | |
d0b07b5d | 4341 | return result; |
504d99c5 MD |
4342 | } |
4343 | ||
4344 | scm_t_trampoline_1 | |
4345 | scm_trampoline_1 (SCM proc) | |
4346 | { | |
4347 | if (SCM_IMP (proc)) | |
d0b07b5d | 4348 | return NULL; |
504d99c5 MD |
4349 | if (SCM_DEBUGGINGP) |
4350 | return scm_call_1; | |
4351 | switch (SCM_TYP7 (proc)) | |
4352 | { | |
4353 | case scm_tc7_subr_1: | |
4354 | case scm_tc7_subr_1o: | |
4355 | return call_subr1_1; | |
9ed24633 MD |
4356 | case scm_tc7_subr_2o: |
4357 | return call_subr2o_1; | |
504d99c5 MD |
4358 | case scm_tc7_lsubr: |
4359 | return call_lsubr_1; | |
14b18ed6 DH |
4360 | case scm_tc7_dsubr: |
4361 | return call_dsubr_1; | |
504d99c5 | 4362 | case scm_tc7_cxr: |
14b18ed6 | 4363 | return call_cxr_1; |
504d99c5 MD |
4364 | case scm_tcs_closures: |
4365 | { | |
4366 | SCM formals = SCM_CLOSURE_FORMALS (proc); | |
4b612c5b MD |
4367 | if (!SCM_NULLP (formals) |
4368 | && (!SCM_CONSP (formals) || !SCM_CONSP (SCM_CDR (formals)))) | |
504d99c5 MD |
4369 | return call_closure_1; |
4370 | else | |
d0b07b5d | 4371 | return NULL; |
504d99c5 MD |
4372 | } |
4373 | case scm_tcs_struct: | |
4374 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) | |
4375 | return scm_call_generic_1; | |
2ca0d207 DH |
4376 | else if (SCM_I_OPERATORP (proc)) |
4377 | return scm_call_1; | |
4378 | return NULL; | |
504d99c5 MD |
4379 | case scm_tc7_smob: |
4380 | if (SCM_SMOB_APPLICABLE_P (proc)) | |
4381 | return SCM_SMOB_DESCRIPTOR (proc).apply_1; | |
4382 | else | |
d0b07b5d | 4383 | return NULL; |
504d99c5 MD |
4384 | case scm_tc7_asubr: |
4385 | case scm_tc7_rpsubr: | |
4386 | case scm_tc7_cclo: | |
4387 | case scm_tc7_pws: | |
4388 | return scm_call_1; | |
4389 | default: | |
d0b07b5d | 4390 | return NULL; /* not applicable on one arg */ |
504d99c5 MD |
4391 | } |
4392 | } | |
4393 | ||
4394 | static SCM | |
4395 | call_subr2_2 (SCM proc, SCM arg1, SCM arg2) | |
4396 | { | |
4397 | return SCM_SUBRF (proc) (arg1, arg2); | |
4398 | } | |
4399 | ||
9ed24633 MD |
4400 | static SCM |
4401 | call_lsubr2_2 (SCM proc, SCM arg1, SCM arg2) | |
4402 | { | |
4403 | return SCM_SUBRF (proc) (arg1, arg2, SCM_EOL); | |
4404 | } | |
4405 | ||
504d99c5 MD |
4406 | static SCM |
4407 | call_lsubr_2 (SCM proc, SCM arg1, SCM arg2) | |
4408 | { | |
4409 | return SCM_SUBRF (proc) (scm_list_2 (arg1, arg2)); | |
4410 | } | |
4411 | ||
4412 | static SCM | |
4413 | call_closure_2 (SCM proc, SCM arg1, SCM arg2) | |
4414 | { | |
6a3f13f0 DH |
4415 | const SCM env = SCM_EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), |
4416 | scm_list_2 (arg1, arg2), | |
4417 | SCM_ENV (proc)); | |
4418 | const SCM result = scm_eval_body (SCM_CLOSURE_BODY (proc), env); | |
d0b07b5d | 4419 | return result; |
504d99c5 MD |
4420 | } |
4421 | ||
4422 | scm_t_trampoline_2 | |
4423 | scm_trampoline_2 (SCM proc) | |
4424 | { | |
4425 | if (SCM_IMP (proc)) | |
d0b07b5d | 4426 | return NULL; |
504d99c5 MD |
4427 | if (SCM_DEBUGGINGP) |
4428 | return scm_call_2; | |
4429 | switch (SCM_TYP7 (proc)) | |
4430 | { | |
4431 | case scm_tc7_subr_2: | |
4432 | case scm_tc7_subr_2o: | |
4433 | case scm_tc7_rpsubr: | |
4434 | case scm_tc7_asubr: | |
4435 | return call_subr2_2; | |
9ed24633 MD |
4436 | case scm_tc7_lsubr_2: |
4437 | return call_lsubr2_2; | |
504d99c5 MD |
4438 | case scm_tc7_lsubr: |
4439 | return call_lsubr_2; | |
4440 | case scm_tcs_closures: | |
4441 | { | |
4442 | SCM formals = SCM_CLOSURE_FORMALS (proc); | |
4b612c5b MD |
4443 | if (!SCM_NULLP (formals) |
4444 | && (!SCM_CONSP (formals) | |
4445 | || (!SCM_NULLP (SCM_CDR (formals)) | |
4446 | && (!SCM_CONSP (SCM_CDR (formals)) | |
4447 | || !SCM_CONSP (SCM_CDDR (formals)))))) | |
504d99c5 MD |
4448 | return call_closure_2; |
4449 | else | |
d0b07b5d | 4450 | return NULL; |
504d99c5 MD |
4451 | } |
4452 | case scm_tcs_struct: | |
4453 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) | |
4454 | return scm_call_generic_2; | |
2ca0d207 DH |
4455 | else if (SCM_I_OPERATORP (proc)) |
4456 | return scm_call_2; | |
4457 | return NULL; | |
504d99c5 MD |
4458 | case scm_tc7_smob: |
4459 | if (SCM_SMOB_APPLICABLE_P (proc)) | |
4460 | return SCM_SMOB_DESCRIPTOR (proc).apply_2; | |
4461 | else | |
d0b07b5d | 4462 | return NULL; |
504d99c5 MD |
4463 | case scm_tc7_cclo: |
4464 | case scm_tc7_pws: | |
4465 | return scm_call_2; | |
4466 | default: | |
d0b07b5d | 4467 | return NULL; /* not applicable on two args */ |
504d99c5 MD |
4468 | } |
4469 | } | |
4470 | ||
d9c393f5 JB |
4471 | /* Typechecking for multi-argument MAP and FOR-EACH. |
4472 | ||
47c3f06d | 4473 | Verify that each element of the vector ARGV, except for the first, |
d9c393f5 | 4474 | is a proper list whose length is LEN. Attribute errors to WHO, |
47c3f06d | 4475 | and claim that the i'th element of ARGV is WHO's i+2'th argument. */ |
d9c393f5 | 4476 | static inline void |
47c3f06d | 4477 | check_map_args (SCM argv, |
c014a02e | 4478 | long len, |
47c3f06d MD |
4479 | SCM gf, |
4480 | SCM proc, | |
4481 | SCM args, | |
4482 | const char *who) | |
d9c393f5 | 4483 | { |
34d19ef6 | 4484 | SCM const *ve = SCM_VELTS (argv); |
c014a02e | 4485 | long i; |
d9c393f5 | 4486 | |
b5c2579a | 4487 | for (i = SCM_VECTOR_LENGTH (argv) - 1; i >= 1; i--) |
d9c393f5 | 4488 | { |
c014a02e | 4489 | long elt_len = scm_ilength (ve[i]); |
d9c393f5 JB |
4490 | |
4491 | if (elt_len < 0) | |
47c3f06d MD |
4492 | { |
4493 | if (gf) | |
4494 | scm_apply_generic (gf, scm_cons (proc, args)); | |
4495 | else | |
4496 | scm_wrong_type_arg (who, i + 2, ve[i]); | |
4497 | } | |
d9c393f5 JB |
4498 | |
4499 | if (elt_len != len) | |
504d99c5 | 4500 | scm_out_of_range_pos (who, ve[i], SCM_MAKINUM (i + 2)); |
d9c393f5 JB |
4501 | } |
4502 | ||
5d2b97cd | 4503 | scm_remember_upto_here_1 (argv); |
d9c393f5 JB |
4504 | } |
4505 | ||
4506 | ||
47c3f06d | 4507 | SCM_GPROC (s_map, "map", 2, 0, 1, scm_map, g_map); |
1cc91f1b | 4508 | |
368bf056 MD |
4509 | /* Note: Currently, scm_map applies PROC to the argument list(s) |
4510 | sequentially, starting with the first element(s). This is used in | |
8878f040 | 4511 | evalext.c where the Scheme procedure `map-in-order', which guarantees |
368bf056 | 4512 | sequential behaviour, is implemented using scm_map. If the |
8878f040 | 4513 | behaviour changes, we need to update `map-in-order'. |
368bf056 MD |
4514 | */ |
4515 | ||
0f2d19dd | 4516 | SCM |
1bbd0b84 | 4517 | scm_map (SCM proc, SCM arg1, SCM args) |
af45e3b0 | 4518 | #define FUNC_NAME s_map |
0f2d19dd | 4519 | { |
c014a02e | 4520 | long i, len; |
0f2d19dd JB |
4521 | SCM res = SCM_EOL; |
4522 | SCM *pres = &res; | |
34d19ef6 | 4523 | SCM const *ve = &args; /* Keep args from being optimized away. */ |
0f2d19dd | 4524 | |
d9c393f5 | 4525 | len = scm_ilength (arg1); |
47c3f06d MD |
4526 | SCM_GASSERTn (len >= 0, |
4527 | g_map, scm_cons2 (proc, arg1, args), SCM_ARG2, s_map); | |
af45e3b0 | 4528 | SCM_VALIDATE_REST_ARGUMENT (args); |
0f2d19dd JB |
4529 | if (SCM_NULLP (args)) |
4530 | { | |
504d99c5 MD |
4531 | scm_t_trampoline_1 call = scm_trampoline_1 (proc); |
4532 | SCM_GASSERT2 (call, g_map, proc, arg1, SCM_ARG1, s_map); | |
4533 | while (SCM_NIMP (arg1)) | |
4534 | { | |
4535 | *pres = scm_list_1 (call (proc, SCM_CAR (arg1))); | |
4536 | pres = SCM_CDRLOC (*pres); | |
4537 | arg1 = SCM_CDR (arg1); | |
4538 | } | |
4539 | return res; | |
4540 | } | |
4541 | if (SCM_NULLP (SCM_CDR (args))) | |
4542 | { | |
4543 | SCM arg2 = SCM_CAR (args); | |
4544 | int len2 = scm_ilength (arg2); | |
4545 | scm_t_trampoline_2 call = scm_trampoline_2 (proc); | |
4546 | SCM_GASSERTn (call, | |
4547 | g_map, scm_cons2 (proc, arg1, args), SCM_ARG1, s_map); | |
4548 | SCM_GASSERTn (len2 >= 0, | |
4549 | g_map, scm_cons2 (proc, arg1, args), SCM_ARG3, s_map); | |
4550 | if (len2 != len) | |
4551 | SCM_OUT_OF_RANGE (3, arg2); | |
0f2d19dd JB |
4552 | while (SCM_NIMP (arg1)) |
4553 | { | |
504d99c5 | 4554 | *pres = scm_list_1 (call (proc, SCM_CAR (arg1), SCM_CAR (arg2))); |
a23afe53 | 4555 | pres = SCM_CDRLOC (*pres); |
0f2d19dd | 4556 | arg1 = SCM_CDR (arg1); |
504d99c5 | 4557 | arg2 = SCM_CDR (arg2); |
0f2d19dd JB |
4558 | } |
4559 | return res; | |
4560 | } | |
05b15362 DH |
4561 | arg1 = scm_cons (arg1, args); |
4562 | args = scm_vector (arg1); | |
0f2d19dd | 4563 | ve = SCM_VELTS (args); |
47c3f06d | 4564 | check_map_args (args, len, g_map, proc, arg1, s_map); |
0f2d19dd JB |
4565 | while (1) |
4566 | { | |
4567 | arg1 = SCM_EOL; | |
b5c2579a | 4568 | for (i = SCM_VECTOR_LENGTH (args) - 1; i >= 0; i--) |
0f2d19dd | 4569 | { |
d9c393f5 JB |
4570 | if (SCM_IMP (ve[i])) |
4571 | return res; | |
0f2d19dd | 4572 | arg1 = scm_cons (SCM_CAR (ve[i]), arg1); |
34d19ef6 | 4573 | SCM_VECTOR_SET (args, i, SCM_CDR (ve[i])); |
0f2d19dd | 4574 | } |
8ea46249 | 4575 | *pres = scm_list_1 (scm_apply (proc, arg1, SCM_EOL)); |
a23afe53 | 4576 | pres = SCM_CDRLOC (*pres); |
0f2d19dd JB |
4577 | } |
4578 | } | |
af45e3b0 | 4579 | #undef FUNC_NAME |
0f2d19dd JB |
4580 | |
4581 | ||
47c3f06d | 4582 | SCM_GPROC (s_for_each, "for-each", 2, 0, 1, scm_for_each, g_for_each); |
1cc91f1b | 4583 | |
0f2d19dd | 4584 | SCM |
1bbd0b84 | 4585 | scm_for_each (SCM proc, SCM arg1, SCM args) |
af45e3b0 | 4586 | #define FUNC_NAME s_for_each |
0f2d19dd | 4587 | { |
34d19ef6 | 4588 | SCM const *ve = &args; /* Keep args from being optimized away. */ |
c014a02e | 4589 | long i, len; |
d9c393f5 | 4590 | len = scm_ilength (arg1); |
47c3f06d MD |
4591 | SCM_GASSERTn (len >= 0, g_for_each, scm_cons2 (proc, arg1, args), |
4592 | SCM_ARG2, s_for_each); | |
af45e3b0 | 4593 | SCM_VALIDATE_REST_ARGUMENT (args); |
c96d76b8 | 4594 | if (SCM_NULLP (args)) |
0f2d19dd | 4595 | { |
504d99c5 MD |
4596 | scm_t_trampoline_1 call = scm_trampoline_1 (proc); |
4597 | SCM_GASSERT2 (call, g_for_each, proc, arg1, SCM_ARG1, s_for_each); | |
4598 | while (SCM_NIMP (arg1)) | |
4599 | { | |
4600 | call (proc, SCM_CAR (arg1)); | |
4601 | arg1 = SCM_CDR (arg1); | |
4602 | } | |
4603 | return SCM_UNSPECIFIED; | |
4604 | } | |
4605 | if (SCM_NULLP (SCM_CDR (args))) | |
4606 | { | |
4607 | SCM arg2 = SCM_CAR (args); | |
4608 | int len2 = scm_ilength (arg2); | |
4609 | scm_t_trampoline_2 call = scm_trampoline_2 (proc); | |
4610 | SCM_GASSERTn (call, g_for_each, | |
4611 | scm_cons2 (proc, arg1, args), SCM_ARG1, s_for_each); | |
4612 | SCM_GASSERTn (len2 >= 0, g_for_each, | |
4613 | scm_cons2 (proc, arg1, args), SCM_ARG3, s_for_each); | |
4614 | if (len2 != len) | |
4615 | SCM_OUT_OF_RANGE (3, arg2); | |
c96d76b8 | 4616 | while (SCM_NIMP (arg1)) |
0f2d19dd | 4617 | { |
504d99c5 | 4618 | call (proc, SCM_CAR (arg1), SCM_CAR (arg2)); |
0f2d19dd | 4619 | arg1 = SCM_CDR (arg1); |
504d99c5 | 4620 | arg2 = SCM_CDR (arg2); |
0f2d19dd JB |
4621 | } |
4622 | return SCM_UNSPECIFIED; | |
4623 | } | |
05b15362 DH |
4624 | arg1 = scm_cons (arg1, args); |
4625 | args = scm_vector (arg1); | |
0f2d19dd | 4626 | ve = SCM_VELTS (args); |
47c3f06d | 4627 | check_map_args (args, len, g_for_each, proc, arg1, s_for_each); |
0f2d19dd JB |
4628 | while (1) |
4629 | { | |
4630 | arg1 = SCM_EOL; | |
b5c2579a | 4631 | for (i = SCM_VECTOR_LENGTH (args) - 1; i >= 0; i--) |
0f2d19dd | 4632 | { |
c96d76b8 NJ |
4633 | if (SCM_IMP (ve[i])) |
4634 | return SCM_UNSPECIFIED; | |
0f2d19dd | 4635 | arg1 = scm_cons (SCM_CAR (ve[i]), arg1); |
34d19ef6 | 4636 | SCM_VECTOR_SET (args, i, SCM_CDR (ve[i])); |
0f2d19dd JB |
4637 | } |
4638 | scm_apply (proc, arg1, SCM_EOL); | |
4639 | } | |
4640 | } | |
af45e3b0 | 4641 | #undef FUNC_NAME |
0f2d19dd | 4642 | |
1cc91f1b | 4643 | |
0f2d19dd | 4644 | SCM |
6e8d25a6 | 4645 | scm_closure (SCM code, SCM env) |
0f2d19dd | 4646 | { |
16d4699b MV |
4647 | SCM z; |
4648 | SCM closcar = scm_cons (code, SCM_EOL); | |
228a24ef | 4649 | z = scm_cell (SCM_UNPACK (closcar) + scm_tc3_closure, (scm_t_bits) env); |
16d4699b | 4650 | scm_remember_upto_here (closcar); |
0f2d19dd JB |
4651 | return z; |
4652 | } | |
4653 | ||
4654 | ||
92c2555f | 4655 | scm_t_bits scm_tc16_promise; |
1cc91f1b | 4656 | |
0f2d19dd | 4657 | SCM |
6e8d25a6 | 4658 | scm_makprom (SCM code) |
0f2d19dd | 4659 | { |
28d52ebb MD |
4660 | SCM_RETURN_NEWSMOB2 (scm_tc16_promise, |
4661 | SCM_UNPACK (code), | |
4662 | scm_make_rec_mutex ()); | |
0f2d19dd JB |
4663 | } |
4664 | ||
28d52ebb MD |
4665 | static size_t |
4666 | promise_free (SCM promise) | |
4667 | { | |
4668 | scm_rec_mutex_free (SCM_PROMISE_MUTEX (promise)); | |
4669 | return 0; | |
4670 | } | |
1cc91f1b | 4671 | |
0f2d19dd | 4672 | static int |
e841c3e0 | 4673 | promise_print (SCM exp, SCM port, scm_print_state *pstate) |
0f2d19dd | 4674 | { |
19402679 | 4675 | int writingp = SCM_WRITINGP (pstate); |
b7f3516f | 4676 | scm_puts ("#<promise ", port); |
19402679 | 4677 | SCM_SET_WRITINGP (pstate, 1); |
28d52ebb | 4678 | scm_iprin1 (SCM_PROMISE_DATA (exp), port, pstate); |
19402679 | 4679 | SCM_SET_WRITINGP (pstate, writingp); |
b7f3516f | 4680 | scm_putc ('>', port); |
0f2d19dd JB |
4681 | return !0; |
4682 | } | |
4683 | ||
3b3b36dd | 4684 | SCM_DEFINE (scm_force, "force", 1, 0, 0, |
28d52ebb | 4685 | (SCM promise), |
67e8151b MG |
4686 | "If the promise @var{x} has not been computed yet, compute and\n" |
4687 | "return @var{x}, otherwise just return the previously computed\n" | |
4688 | "value.") | |
1bbd0b84 | 4689 | #define FUNC_NAME s_scm_force |
0f2d19dd | 4690 | { |
28d52ebb MD |
4691 | SCM_VALIDATE_SMOB (1, promise, promise); |
4692 | scm_rec_mutex_lock (SCM_PROMISE_MUTEX (promise)); | |
4693 | if (!SCM_PROMISE_COMPUTED_P (promise)) | |
0f2d19dd | 4694 | { |
28d52ebb MD |
4695 | SCM ans = scm_call_0 (SCM_PROMISE_DATA (promise)); |
4696 | if (!SCM_PROMISE_COMPUTED_P (promise)) | |
0f2d19dd | 4697 | { |
28d52ebb MD |
4698 | SCM_SET_PROMISE_DATA (promise, ans); |
4699 | SCM_SET_PROMISE_COMPUTED (promise); | |
0f2d19dd JB |
4700 | } |
4701 | } | |
28d52ebb MD |
4702 | scm_rec_mutex_unlock (SCM_PROMISE_MUTEX (promise)); |
4703 | return SCM_PROMISE_DATA (promise); | |
0f2d19dd | 4704 | } |
1bbd0b84 | 4705 | #undef FUNC_NAME |
0f2d19dd | 4706 | |
445f675c | 4707 | |
a1ec6916 | 4708 | SCM_DEFINE (scm_promise_p, "promise?", 1, 0, 0, |
67e8151b | 4709 | (SCM obj), |
b380b885 | 4710 | "Return true if @var{obj} is a promise, i.e. a delayed computation\n" |
7a095584 | 4711 | "(@pxref{Delayed evaluation,,,r5rs.info,The Revised^5 Report on Scheme}).") |
1bbd0b84 | 4712 | #define FUNC_NAME s_scm_promise_p |
0f2d19dd | 4713 | { |
67e8151b | 4714 | return SCM_BOOL (SCM_TYP16_PREDICATE (scm_tc16_promise, obj)); |
0f2d19dd | 4715 | } |
1bbd0b84 | 4716 | #undef FUNC_NAME |
0f2d19dd | 4717 | |
445f675c | 4718 | |
a1ec6916 | 4719 | SCM_DEFINE (scm_cons_source, "cons-source", 3, 0, 0, |
1bbd0b84 | 4720 | (SCM xorig, SCM x, SCM y), |
11768c04 NJ |
4721 | "Create and return a new pair whose car and cdr are @var{x} and @var{y}.\n" |
4722 | "Any source properties associated with @var{xorig} are also associated\n" | |
4723 | "with the new pair.") | |
1bbd0b84 | 4724 | #define FUNC_NAME s_scm_cons_source |
26d5b9b4 MD |
4725 | { |
4726 | SCM p, z; | |
16d4699b | 4727 | z = scm_cons (x, y); |
26d5b9b4 MD |
4728 | /* Copy source properties possibly associated with xorig. */ |
4729 | p = scm_whash_lookup (scm_source_whash, xorig); | |
445f675c | 4730 | if (!SCM_IMP (p)) |
26d5b9b4 MD |
4731 | scm_whash_insert (scm_source_whash, z, p); |
4732 | return z; | |
4733 | } | |
1bbd0b84 | 4734 | #undef FUNC_NAME |
26d5b9b4 | 4735 | |
445f675c | 4736 | |
a1ec6916 | 4737 | SCM_DEFINE (scm_copy_tree, "copy-tree", 1, 0, 0, |
1bbd0b84 | 4738 | (SCM obj), |
b380b885 MD |
4739 | "Recursively copy the data tree that is bound to @var{obj}, and return a\n" |
4740 | "pointer to the new data structure. @code{copy-tree} recurses down the\n" | |
4741 | "contents of both pairs and vectors (since both cons cells and vector\n" | |
4742 | "cells may point to arbitrary objects), and stops recursing when it hits\n" | |
4743 | "any other object.") | |
1bbd0b84 | 4744 | #define FUNC_NAME s_scm_copy_tree |
0f2d19dd JB |
4745 | { |
4746 | SCM ans, tl; | |
26d5b9b4 | 4747 | if (SCM_IMP (obj)) |
ff467021 | 4748 | return obj; |
3910272e MD |
4749 | if (SCM_VECTORP (obj)) |
4750 | { | |
c014a02e | 4751 | unsigned long i = SCM_VECTOR_LENGTH (obj); |
00ffa0e7 | 4752 | ans = scm_c_make_vector (i, SCM_UNSPECIFIED); |
3910272e | 4753 | while (i--) |
34d19ef6 | 4754 | SCM_VECTOR_SET (ans, i, scm_copy_tree (SCM_VELTS (obj)[i])); |
3910272e MD |
4755 | return ans; |
4756 | } | |
01f11e02 | 4757 | if (!SCM_CONSP (obj)) |
0f2d19dd | 4758 | return obj; |
26d5b9b4 MD |
4759 | ans = tl = scm_cons_source (obj, |
4760 | scm_copy_tree (SCM_CAR (obj)), | |
4761 | SCM_UNSPECIFIED); | |
05b15362 | 4762 | for (obj = SCM_CDR (obj); SCM_CONSP (obj); obj = SCM_CDR (obj)) |
a23afe53 MD |
4763 | { |
4764 | SCM_SETCDR (tl, scm_cons (scm_copy_tree (SCM_CAR (obj)), | |
4765 | SCM_UNSPECIFIED)); | |
4766 | tl = SCM_CDR (tl); | |
4767 | } | |
4768 | SCM_SETCDR (tl, obj); | |
0f2d19dd JB |
4769 | return ans; |
4770 | } | |
1bbd0b84 | 4771 | #undef FUNC_NAME |
0f2d19dd | 4772 | |
1cc91f1b | 4773 | |
4163eb72 MV |
4774 | /* We have three levels of EVAL here: |
4775 | ||
4776 | - scm_i_eval (exp, env) | |
4777 | ||
4778 | evaluates EXP in environment ENV. ENV is a lexical environment | |
4779 | structure as used by the actual tree code evaluator. When ENV is | |
4780 | a top-level environment, then changes to the current module are | |
a513ead3 | 4781 | tracked by updating ENV so that it continues to be in sync with |
4163eb72 MV |
4782 | the current module. |
4783 | ||
4784 | - scm_primitive_eval (exp) | |
4785 | ||
4786 | evaluates EXP in the top-level environment as determined by the | |
4787 | current module. This is done by constructing a suitable | |
4788 | environment and calling scm_i_eval. Thus, changes to the | |
4789 | top-level module are tracked normally. | |
4790 | ||
4791 | - scm_eval (exp, mod) | |
4792 | ||
a513ead3 | 4793 | evaluates EXP while MOD is the current module. This is done by |
4163eb72 MV |
4794 | setting the current module to MOD, invoking scm_primitive_eval on |
4795 | EXP, and then restoring the current module to the value it had | |
4796 | previously. That is, while EXP is evaluated, changes to the | |
4797 | current module are tracked, but these changes do not persist when | |
4798 | scm_eval returns. | |
4799 | ||
4800 | For each level of evals, there are two variants, distinguished by a | |
4801 | _x suffix: the ordinary variant does not modify EXP while the _x | |
4802 | variant can destructively modify EXP into something completely | |
4803 | unintelligible. A Scheme data structure passed as EXP to one of the | |
4804 | _x variants should not ever be used again for anything. So when in | |
4805 | doubt, use the ordinary variant. | |
4806 | ||
4807 | */ | |
4808 | ||
0f2d19dd | 4809 | SCM |
68d8be66 | 4810 | scm_i_eval_x (SCM exp, SCM env) |
0f2d19dd | 4811 | { |
68d8be66 | 4812 | return SCM_XEVAL (exp, env); |
0f2d19dd JB |
4813 | } |
4814 | ||
68d8be66 MD |
4815 | SCM |
4816 | scm_i_eval (SCM exp, SCM env) | |
4817 | { | |
26fb6390 | 4818 | exp = scm_copy_tree (exp); |
e37a4fba | 4819 | return SCM_XEVAL (exp, env); |
68d8be66 MD |
4820 | } |
4821 | ||
4822 | SCM | |
4163eb72 | 4823 | scm_primitive_eval_x (SCM exp) |
0f2d19dd | 4824 | { |
a513ead3 | 4825 | SCM env; |
bcdab802 | 4826 | SCM transformer = scm_current_module_transformer (); |
a513ead3 | 4827 | if (SCM_NIMP (transformer)) |
fdc28395 | 4828 | exp = scm_call_1 (transformer, exp); |
a513ead3 | 4829 | env = scm_top_level_env (scm_current_module_lookup_closure ()); |
4163eb72 | 4830 | return scm_i_eval_x (exp, env); |
0f2d19dd JB |
4831 | } |
4832 | ||
4163eb72 MV |
4833 | SCM_DEFINE (scm_primitive_eval, "primitive-eval", 1, 0, 0, |
4834 | (SCM exp), | |
2069af38 | 4835 | "Evaluate @var{exp} in the top-level environment specified by\n" |
4163eb72 MV |
4836 | "the current module.") |
4837 | #define FUNC_NAME s_scm_primitive_eval | |
4838 | { | |
a513ead3 | 4839 | SCM env; |
bcdab802 | 4840 | SCM transformer = scm_current_module_transformer (); |
a513ead3 | 4841 | if (SCM_NIMP (transformer)) |
fdc28395 | 4842 | exp = scm_call_1 (transformer, exp); |
a513ead3 | 4843 | env = scm_top_level_env (scm_current_module_lookup_closure ()); |
4163eb72 MV |
4844 | return scm_i_eval (exp, env); |
4845 | } | |
4846 | #undef FUNC_NAME | |
4847 | ||
68d8be66 MD |
4848 | /* Eval does not take the second arg optionally. This is intentional |
4849 | * in order to be R5RS compatible, and to prepare for the new module | |
4850 | * system, where we would like to make the choice of evaluation | |
4163eb72 | 4851 | * environment explicit. */ |
549e6ec6 | 4852 | |
09074dbf DH |
4853 | static void |
4854 | change_environment (void *data) | |
4855 | { | |
4856 | SCM pair = SCM_PACK (data); | |
4857 | SCM new_module = SCM_CAR (pair); | |
aa767bc5 | 4858 | SCM old_module = scm_current_module (); |
09074dbf | 4859 | SCM_SETCDR (pair, old_module); |
aa767bc5 | 4860 | scm_set_current_module (new_module); |
09074dbf DH |
4861 | } |
4862 | ||
4863 | ||
09074dbf DH |
4864 | static void |
4865 | restore_environment (void *data) | |
4866 | { | |
4867 | SCM pair = SCM_PACK (data); | |
4868 | SCM old_module = SCM_CDR (pair); | |
aa767bc5 | 4869 | SCM new_module = scm_current_module (); |
2e9c835d | 4870 | SCM_SETCAR (pair, new_module); |
aa767bc5 | 4871 | scm_set_current_module (old_module); |
09074dbf DH |
4872 | } |
4873 | ||
4163eb72 MV |
4874 | static SCM |
4875 | inner_eval_x (void *data) | |
4876 | { | |
4877 | return scm_primitive_eval_x (SCM_PACK(data)); | |
4878 | } | |
4879 | ||
4880 | SCM | |
4881 | scm_eval_x (SCM exp, SCM module) | |
4882 | #define FUNC_NAME "eval!" | |
4883 | { | |
4884 | SCM_VALIDATE_MODULE (2, module); | |
4885 | ||
4886 | return scm_internal_dynamic_wind | |
4887 | (change_environment, inner_eval_x, restore_environment, | |
4888 | (void *) SCM_UNPACK (exp), | |
4889 | (void *) SCM_UNPACK (scm_cons (module, SCM_BOOL_F))); | |
4890 | } | |
4891 | #undef FUNC_NAME | |
4892 | ||
4893 | static SCM | |
4894 | inner_eval (void *data) | |
4895 | { | |
4896 | return scm_primitive_eval (SCM_PACK(data)); | |
4897 | } | |
09074dbf | 4898 | |
68d8be66 | 4899 | SCM_DEFINE (scm_eval, "eval", 2, 0, 0, |
4163eb72 MV |
4900 | (SCM exp, SCM module), |
4901 | "Evaluate @var{exp}, a list representing a Scheme expression,\n" | |
4902 | "in the top-level environment specified by @var{module}.\n" | |
8f85c0c6 | 4903 | "While @var{exp} is evaluated (using @code{primitive-eval}),\n" |
4163eb72 MV |
4904 | "@var{module} is made the current module. The current module\n" |
4905 | "is reset to its previous value when @var{eval} returns.") | |
1bbd0b84 | 4906 | #define FUNC_NAME s_scm_eval |
0f2d19dd | 4907 | { |
4163eb72 | 4908 | SCM_VALIDATE_MODULE (2, module); |
09074dbf DH |
4909 | |
4910 | return scm_internal_dynamic_wind | |
4911 | (change_environment, inner_eval, restore_environment, | |
4163eb72 MV |
4912 | (void *) SCM_UNPACK (exp), |
4913 | (void *) SCM_UNPACK (scm_cons (module, SCM_BOOL_F))); | |
0f2d19dd | 4914 | } |
1bbd0b84 | 4915 | #undef FUNC_NAME |
0f2d19dd | 4916 | |
6dbd0af5 MD |
4917 | |
4918 | /* At this point, scm_deval and scm_dapply are generated. | |
4919 | */ | |
4920 | ||
a44a9715 DH |
4921 | #define DEVAL |
4922 | #include "eval.c" | |
0f2d19dd | 4923 | |
1cc91f1b | 4924 | |
0f2d19dd JB |
4925 | void |
4926 | scm_init_eval () | |
0f2d19dd | 4927 | { |
33b97402 MD |
4928 | scm_init_opts (scm_evaluator_traps, |
4929 | scm_evaluator_trap_table, | |
4930 | SCM_N_EVALUATOR_TRAPS); | |
4931 | scm_init_opts (scm_eval_options_interface, | |
4932 | scm_eval_opts, | |
4933 | SCM_N_EVAL_OPTIONS); | |
4934 | ||
f99c9c28 MD |
4935 | scm_tc16_promise = scm_make_smob_type ("promise", 0); |
4936 | scm_set_smob_mark (scm_tc16_promise, scm_markcdr); | |
28d52ebb | 4937 | scm_set_smob_free (scm_tc16_promise, promise_free); |
e841c3e0 | 4938 | scm_set_smob_print (scm_tc16_promise, promise_print); |
b8229a3b | 4939 | |
a44a9715 DH |
4940 | undefineds = scm_list_1 (SCM_UNDEFINED); |
4941 | SCM_SETCDR (undefineds, undefineds); | |
4942 | scm_permanent_object (undefineds); | |
7c33806a | 4943 | |
a44a9715 | 4944 | scm_listofnull = scm_list_1 (SCM_EOL); |
0f2d19dd | 4945 | |
a44a9715 DH |
4946 | f_apply = scm_c_define_subr ("apply", scm_tc7_lsubr_2, scm_apply); |
4947 | scm_permanent_object (f_apply); | |
86d31dfe | 4948 | |
a0599745 | 4949 | #include "libguile/eval.x" |
86d31dfe | 4950 | |
25eaf21a | 4951 | scm_add_feature ("delay"); |
0f2d19dd | 4952 | } |
0f2d19dd | 4953 | |
6dbd0af5 | 4954 | #endif /* !DEVAL */ |
89e00824 ML |
4955 | |
4956 | /* | |
4957 | Local Variables: | |
4958 | c-file-style: "gnu" | |
4959 | End: | |
4960 | */ |