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 | 56 | #include "libguile/_scm.h" |
21628685 DH |
57 | #include "libguile/alist.h" |
58 | #include "libguile/async.h" | |
59 | #include "libguile/continuations.h" | |
a0599745 | 60 | #include "libguile/debug.h" |
328dc9a3 | 61 | #include "libguile/deprecation.h" |
09074dbf | 62 | #include "libguile/dynwind.h" |
a0599745 | 63 | #include "libguile/eq.h" |
21628685 DH |
64 | #include "libguile/feature.h" |
65 | #include "libguile/fluids.h" | |
756414cf | 66 | #include "libguile/futures.h" |
21628685 DH |
67 | #include "libguile/goops.h" |
68 | #include "libguile/hash.h" | |
69 | #include "libguile/hashtab.h" | |
70 | #include "libguile/lang.h" | |
4610b011 | 71 | #include "libguile/list.h" |
a0599745 | 72 | #include "libguile/macros.h" |
a0599745 | 73 | #include "libguile/modules.h" |
21628685 | 74 | #include "libguile/objects.h" |
a0599745 | 75 | #include "libguile/ports.h" |
21628685 | 76 | #include "libguile/procprop.h" |
a0599745 | 77 | #include "libguile/root.h" |
21628685 DH |
78 | #include "libguile/smob.h" |
79 | #include "libguile/srcprop.h" | |
80 | #include "libguile/stackchk.h" | |
81 | #include "libguile/strings.h" | |
82 | #include "libguile/throw.h" | |
83 | #include "libguile/validate.h" | |
a513ead3 | 84 | #include "libguile/values.h" |
21628685 | 85 | #include "libguile/vectors.h" |
a0599745 | 86 | |
a0599745 | 87 | #include "libguile/eval.h" |
89efbff4 | 88 | |
0f2d19dd JB |
89 | \f |
90 | ||
0f572ba7 DH |
91 | static SCM canonicalize_define (SCM expr); |
92 | ||
93 | \f | |
94 | ||
e6729603 DH |
95 | /* {Syntax Errors} |
96 | * | |
97 | * This section defines the message strings for the syntax errors that can be | |
98 | * detected during memoization and the functions and macros that shall be | |
99 | * called by the memoizer code to signal syntax errors. */ | |
100 | ||
101 | ||
102 | /* Syntax errors that can be detected during memoization: */ | |
103 | ||
104 | /* Circular or improper lists do not form valid scheme expressions. If a | |
105 | * circular list or an improper list is detected in a place where a scheme | |
106 | * expression is expected, a 'Bad expression' error is signalled. */ | |
107 | static const char s_bad_expression[] = "Bad expression"; | |
108 | ||
89bff2fc DH |
109 | /* If a form is detected that holds a different number of expressions than are |
110 | * required in that context, a 'Missing or extra expression' error is | |
111 | * signalled. */ | |
112 | static const char s_expression[] = "Missing or extra expression in"; | |
113 | ||
cc56ba80 | 114 | /* If a form is detected that holds less expressions than are required in that |
8ae95199 | 115 | * context, a 'Missing expression' error is signalled. */ |
cc56ba80 DH |
116 | static const char s_missing_expression[] = "Missing expression in"; |
117 | ||
ced8edb0 DH |
118 | /* A body may hold an arbitrary number of internal defines, followed by a |
119 | * non-empty sequence of expressions. If a body with an empty sequence of | |
120 | * expressions is detected, a 'Missing body expression' error is signalled. | |
121 | */ | |
122 | static const char s_missing_body_expression[] = "Missing body expression in"; | |
123 | ||
609a8b86 | 124 | /* If a form is detected that holds more expressions than are allowed in that |
8ae95199 | 125 | * context, an 'Extra expression' error is signalled. */ |
609a8b86 DH |
126 | static const char s_extra_expression[] = "Extra expression in"; |
127 | ||
89bff2fc DH |
128 | /* The empty combination '()' is not allowed as an expression in scheme. If |
129 | * it is detected in a place where an expression is expected, an 'Illegal | |
130 | * empty combination' error is signalled. Note: If you encounter this error | |
131 | * message, it is very likely that you intended to denote the empty list. To | |
132 | * do so, you need to quote the empty list like (quote ()) or '(). */ | |
133 | static const char s_empty_combination[] = "Illegal empty combination"; | |
134 | ||
2a6f7afe DH |
135 | /* Case or cond expressions must have at least one clause. If a case or cond |
136 | * expression without any clauses is detected, a 'Missing clauses' error is | |
137 | * signalled. */ | |
138 | static const char s_missing_clauses[] = "Missing clauses"; | |
139 | ||
609a8b86 DH |
140 | /* If there is an 'else' clause in a case or a cond statement, it must be the |
141 | * last clause. If after the 'else' case clause further clauses are detected, | |
142 | * a 'Misplaced else clause' error is signalled. */ | |
143 | static const char s_misplaced_else_clause[] = "Misplaced else clause"; | |
144 | ||
2a6f7afe DH |
145 | /* If a case clause is detected that is not in the format |
146 | * (<label(s)> <expression1> <expression2> ...) | |
147 | * a 'Bad case clause' error is signalled. */ | |
148 | static const char s_bad_case_clause[] = "Bad case clause"; | |
149 | ||
2a6f7afe DH |
150 | /* If a case clause is detected where the <label(s)> element is neither a |
151 | * proper list nor (in case of the last clause) the syntactic keyword 'else', | |
152 | * a 'Bad case labels' error is signalled. Note: If you encounter this error | |
153 | * for an else-clause which seems to be syntactically correct, check if 'else' | |
154 | * is really a syntactic keyword in that context. If 'else' is bound in the | |
155 | * local or global environment, it is not considered a syntactic keyword, but | |
156 | * will be treated as any other variable. */ | |
157 | static const char s_bad_case_labels[] = "Bad case labels"; | |
158 | ||
159 | /* In a case statement all labels have to be distinct. If in a case statement | |
160 | * a label occurs more than once, a 'Duplicate case label' error is | |
161 | * signalled. */ | |
162 | static const char s_duplicate_case_label[] = "Duplicate case label"; | |
163 | ||
609a8b86 DH |
164 | /* If a cond clause is detected that is not in one of the formats |
165 | * (<test> <expression1> ...) or (else <expression1> <expression2> ...) | |
166 | * a 'Bad cond clause' error is signalled. */ | |
167 | static const char s_bad_cond_clause[] = "Bad cond clause"; | |
168 | ||
169 | /* If a cond clause is detected that uses the alternate '=>' form, but does | |
170 | * not hold a recipient element for the test result, a 'Missing recipient' | |
171 | * error is signalled. */ | |
172 | static const char s_missing_recipient[] = "Missing recipient in"; | |
173 | ||
cc56ba80 DH |
174 | /* If in a position where a variable name is required some other object is |
175 | * detected, a 'Bad variable' error is signalled. */ | |
176 | static const char s_bad_variable[] = "Bad variable"; | |
177 | ||
a954ce1d DH |
178 | /* Bindings for forms like 'let' and 'do' have to be given in a proper, |
179 | * possibly empty list. If any other object is detected in a place where a | |
180 | * list of bindings was required, a 'Bad bindings' error is signalled. */ | |
181 | static const char s_bad_bindings[] = "Bad bindings"; | |
182 | ||
183 | /* Depending on the syntactic context, a binding has to be in the format | |
184 | * (<variable> <expression>) or (<variable> <expression1> <expression2>). | |
185 | * If anything else is detected in a place where a binding was expected, a | |
186 | * 'Bad binding' error is signalled. */ | |
187 | static const char s_bad_binding[] = "Bad binding"; | |
188 | ||
4610b011 DH |
189 | /* Some syntactic forms don't allow variable names to appear more than once in |
190 | * a list of bindings. If such a situation is nevertheless detected, a | |
191 | * 'Duplicate binding' error is signalled. */ | |
192 | static const char s_duplicate_binding[] = "Duplicate binding"; | |
193 | ||
a954ce1d DH |
194 | /* If the exit form of a 'do' expression is not in the format |
195 | * (<test> <expression> ...) | |
196 | * a 'Bad exit clause' error is signalled. */ | |
197 | static const char s_bad_exit_clause[] = "Bad exit clause"; | |
198 | ||
03a3e941 DH |
199 | /* The formal function arguments of a lambda expression have to be either a |
200 | * single symbol or a non-cyclic list. For anything else a 'Bad formals' | |
201 | * error is signalled. */ | |
202 | static const char s_bad_formals[] = "Bad formals"; | |
203 | ||
204 | /* If in a lambda expression something else than a symbol is detected at a | |
205 | * place where a formal function argument is required, a 'Bad formal' error is | |
206 | * signalled. */ | |
207 | static const char s_bad_formal[] = "Bad formal"; | |
208 | ||
209 | /* If in the arguments list of a lambda expression an argument name occurs | |
210 | * more than once, a 'Duplicate formal' error is signalled. */ | |
211 | static const char s_duplicate_formal[] = "Duplicate formal"; | |
212 | ||
9a848baf DH |
213 | /* If something else than an exact integer is detected as the argument for |
214 | * @slot-ref and @slot-set!, a 'Bad slot number' error is signalled. */ | |
215 | static const char s_bad_slot_number[] = "Bad slot number"; | |
216 | ||
e6729603 DH |
217 | |
218 | /* Signal a syntax error. We distinguish between the form that caused the | |
219 | * error and the enclosing expression. The error message will print out as | |
220 | * shown in the following pattern. The file name and line number are only | |
221 | * given when they can be determined from the erroneous form or from the | |
222 | * enclosing expression. | |
223 | * | |
224 | * <filename>: In procedure memoization: | |
225 | * <filename>: In file <name>, line <nr>: <error-message> in <expression>. */ | |
226 | ||
227 | SCM_SYMBOL (syntax_error_key, "syntax-error"); | |
228 | ||
229 | /* The prototype is needed to indicate that the function does not return. */ | |
230 | static void | |
231 | syntax_error (const char* const, const SCM, const SCM) SCM_NORETURN; | |
232 | ||
233 | static void | |
234 | syntax_error (const char* const msg, const SCM form, const SCM expr) | |
235 | { | |
236 | const SCM msg_string = scm_makfrom0str (msg); | |
237 | SCM filename = SCM_BOOL_F; | |
238 | SCM linenr = SCM_BOOL_F; | |
239 | const char *format; | |
240 | SCM args; | |
241 | ||
242 | if (SCM_CONSP (form)) | |
243 | { | |
244 | filename = scm_source_property (form, scm_sym_filename); | |
245 | linenr = scm_source_property (form, scm_sym_line); | |
246 | } | |
247 | ||
248 | if (SCM_FALSEP (filename) && SCM_FALSEP (linenr) && SCM_CONSP (expr)) | |
249 | { | |
250 | filename = scm_source_property (expr, scm_sym_filename); | |
251 | linenr = scm_source_property (expr, scm_sym_line); | |
252 | } | |
253 | ||
254 | if (!SCM_UNBNDP (expr)) | |
255 | { | |
256 | if (!SCM_FALSEP (filename)) | |
257 | { | |
258 | format = "In file ~S, line ~S: ~A ~S in expression ~S."; | |
259 | args = scm_list_5 (filename, linenr, msg_string, form, expr); | |
260 | } | |
261 | else if (!SCM_FALSEP (linenr)) | |
262 | { | |
263 | format = "In line ~S: ~A ~S in expression ~S."; | |
264 | args = scm_list_4 (linenr, msg_string, form, expr); | |
265 | } | |
266 | else | |
267 | { | |
268 | format = "~A ~S in expression ~S."; | |
269 | args = scm_list_3 (msg_string, form, expr); | |
270 | } | |
271 | } | |
272 | else | |
273 | { | |
274 | if (!SCM_FALSEP (filename)) | |
275 | { | |
276 | format = "In file ~S, line ~S: ~A ~S."; | |
277 | args = scm_list_4 (filename, linenr, msg_string, form); | |
278 | } | |
279 | else if (!SCM_FALSEP (linenr)) | |
280 | { | |
281 | format = "In line ~S: ~A ~S."; | |
282 | args = scm_list_3 (linenr, msg_string, form); | |
283 | } | |
284 | else | |
285 | { | |
286 | format = "~A ~S."; | |
287 | args = scm_list_2 (msg_string, form); | |
288 | } | |
289 | } | |
290 | ||
291 | scm_error (syntax_error_key, "memoization", format, args, SCM_BOOL_F); | |
292 | } | |
293 | ||
294 | ||
295 | /* Shortcut macros to simplify syntax error handling. */ | |
296 | #define ASSERT_SYNTAX(cond, message, form) \ | |
297 | { if (!(cond)) syntax_error (message, form, SCM_UNDEFINED); } | |
298 | #define ASSERT_SYNTAX_2(cond, message, form, expr) \ | |
299 | { if (!(cond)) syntax_error (message, form, expr); } | |
300 | ||
301 | \f | |
302 | ||
d0624e39 DH |
303 | /* {Ilocs} |
304 | * | |
305 | * Ilocs are memoized references to variables in local environment frames. | |
306 | * They are represented as three values: The relative offset of the | |
307 | * environment frame, the number of the binding within that frame, and a | |
308 | * boolean value indicating whether the binding is the last binding in the | |
309 | * frame. | |
310 | */ | |
311 | #define SCM_ILOC00 SCM_MAKE_ITAG8(0L, scm_tc8_iloc) | |
312 | #define SCM_IDINC (0x00100000L) | |
313 | #define SCM_IDSTMSK (-SCM_IDINC) | |
314 | #define SCM_MAKE_ILOC(frame_nr, binding_nr, last_p) \ | |
315 | SCM_PACK ( \ | |
316 | ((frame_nr) << 8) \ | |
317 | + ((binding_nr) << 20) \ | |
318 | + ((last_p) ? SCM_ICDR : 0) \ | |
319 | + scm_tc8_iloc ) | |
320 | ||
321 | #if (SCM_DEBUG_DEBUGGING_SUPPORT == 1) | |
322 | ||
323 | SCM scm_dbg_make_iloc (SCM frame, SCM binding, SCM cdrp); | |
324 | SCM_DEFINE (scm_dbg_make_iloc, "dbg-make-iloc", 3, 0, 0, | |
325 | (SCM frame, SCM binding, SCM cdrp), | |
326 | "Return a new iloc with frame offset @var{frame}, binding\n" | |
327 | "offset @var{binding} and the cdr flag @var{cdrp}.") | |
328 | #define FUNC_NAME s_scm_dbg_make_iloc | |
329 | { | |
330 | SCM_VALIDATE_INUM (1, frame); | |
331 | SCM_VALIDATE_INUM (2, binding); | |
332 | return SCM_MAKE_ILOC (SCM_INUM (frame), | |
333 | SCM_INUM (binding), | |
334 | !SCM_FALSEP (cdrp)); | |
335 | } | |
336 | #undef FUNC_NAME | |
337 | ||
338 | SCM scm_dbg_iloc_p (SCM obj); | |
339 | SCM_DEFINE (scm_dbg_iloc_p, "dbg-iloc?", 1, 0, 0, | |
340 | (SCM obj), | |
341 | "Return @code{#t} if @var{obj} is an iloc.") | |
342 | #define FUNC_NAME s_scm_dbg_iloc_p | |
343 | { | |
344 | return SCM_BOOL (SCM_ILOCP (obj)); | |
345 | } | |
346 | #undef FUNC_NAME | |
347 | ||
348 | #endif | |
349 | ||
350 | \f | |
351 | ||
17fa3fcf | 352 | #define SCM_VALIDATE_NON_EMPTY_COMBINATION(x) \ |
89bff2fc | 353 | ASSERT_SYNTAX (!SCM_EQ_P ((x), SCM_EOL), s_empty_combination, x) |
17fa3fcf DH |
354 | |
355 | \f | |
356 | ||
6dbd0af5 MD |
357 | /* The evaluator contains a plethora of EVAL symbols. |
358 | * This is an attempt at explanation. | |
359 | * | |
360 | * The following macros should be used in code which is read twice | |
361 | * (where the choice of evaluator is hard soldered): | |
362 | * | |
363 | * SCM_CEVAL is the symbol used within one evaluator to call itself. | |
364 | * Originally, it is defined to scm_ceval, but is redefined to | |
365 | * scm_deval during the second pass. | |
366 | * | |
6cb702da | 367 | * SCM_EVALIM is used when it is known that the expression is an |
6dbd0af5 MD |
368 | * immediate. (This macro never calls an evaluator.) |
369 | * | |
370 | * EVALCAR evaluates the car of an expression. | |
371 | * | |
6dbd0af5 MD |
372 | * The following macros should be used in code which is read once |
373 | * (where the choice of evaluator is dynamic): | |
374 | * | |
6cb702da | 375 | * SCM_XEVAL takes care of immediates without calling an evaluator. It |
6dbd0af5 MD |
376 | * then calls scm_ceval *or* scm_deval, depending on the debugging |
377 | * mode. | |
378 | * | |
6cb702da | 379 | * SCM_XEVALCAR corresponds to EVALCAR, but uses scm_ceval *or* scm_deval |
6dbd0af5 MD |
380 | * depending on the debugging mode. |
381 | * | |
382 | * The main motivation for keeping this plethora is efficiency | |
383 | * together with maintainability (=> locality of code). | |
384 | */ | |
385 | ||
6cb702da | 386 | #define SCM_CEVAL scm_ceval |
0f2d19dd | 387 | |
e90c3a89 DH |
388 | #define SCM_EVALIM2(x) \ |
389 | ((SCM_EQ_P ((x), SCM_EOL) \ | |
89bff2fc | 390 | ? syntax_error (s_empty_combination, (x), SCM_UNDEFINED), 0 \ |
e90c3a89 DH |
391 | : 0), \ |
392 | (x)) | |
393 | ||
394 | #define SCM_EVALIM(x, env) (SCM_ILOCP (x) \ | |
395 | ? *scm_ilookup ((x), env) \ | |
396 | : SCM_EVALIM2(x)) | |
397 | ||
398 | #define SCM_XEVAL(x, env) (SCM_IMP (x) \ | |
399 | ? SCM_EVALIM2(x) \ | |
400 | : (*scm_ceval_ptr) ((x), (env))) | |
401 | ||
402 | #define SCM_XEVALCAR(x, env) (SCM_IMP (SCM_CAR (x)) \ | |
403 | ? SCM_EVALIM (SCM_CAR (x), env) \ | |
404 | : (SCM_SYMBOLP (SCM_CAR (x)) \ | |
405 | ? *scm_lookupcar (x, env, 1) \ | |
406 | : (*scm_ceval_ptr) (SCM_CAR (x), env))) | |
407 | ||
8c494e99 | 408 | #define EVALCAR(x, env) (SCM_IMP (SCM_CAR (x)) \ |
904a077d | 409 | ? SCM_EVALIM (SCM_CAR (x), env) \ |
680516ba DH |
410 | : (SCM_SYMBOLP (SCM_CAR (x)) \ |
411 | ? *scm_lookupcar (x, env, 1) \ | |
412 | : SCM_CEVAL (SCM_CAR (x), env))) | |
0f2d19dd | 413 | |
28d52ebb | 414 | SCM_REC_MUTEX (source_mutex); |
9bc4701c | 415 | |
12841895 | 416 | |
e90c3a89 | 417 | static const char s_test[] = "bad test"; |
e90c3a89 DH |
418 | static const char s_bindings[] = "bad bindings"; |
419 | static const char s_duplicate_bindings[] = "duplicate bindings"; | |
420 | static const char s_variable[] = "bad variable"; | |
e90c3a89 DH |
421 | static const char s_splicing[] = "bad (non-list) result for unquote-splicing"; |
422 | ||
423 | ||
12841895 DH |
424 | /* Lookup a given local variable in an environment. The local variable is |
425 | * given as an iloc, that is a triple <frame, binding, last?>, where frame | |
426 | * indicates the relative number of the environment frame (counting upwards | |
427 | * from the innermost environment frame), binding indicates the number of the | |
428 | * binding within the frame, and last? (which is extracted from the iloc using | |
429 | * the macro SCM_ICDRP) indicates whether the binding forms the binding at the | |
430 | * very end of the improper list of bindings. */ | |
0f2d19dd | 431 | SCM * |
6e8d25a6 | 432 | scm_ilookup (SCM iloc, SCM env) |
0f2d19dd | 433 | { |
12841895 DH |
434 | unsigned int frame_nr = SCM_IFRAME (iloc); |
435 | unsigned int binding_nr = SCM_IDIST (iloc); | |
436 | SCM frames = env; | |
437 | SCM bindings; | |
438 | ||
439 | for (; 0 != frame_nr; --frame_nr) | |
440 | frames = SCM_CDR (frames); | |
441 | ||
442 | bindings = SCM_CAR (frames); | |
443 | for (; 0 != binding_nr; --binding_nr) | |
444 | bindings = SCM_CDR (bindings); | |
445 | ||
0f2d19dd | 446 | if (SCM_ICDRP (iloc)) |
12841895 DH |
447 | return SCM_CDRLOC (bindings); |
448 | return SCM_CARLOC (SCM_CDR (bindings)); | |
0f2d19dd | 449 | } |
0f2d19dd | 450 | |
12841895 | 451 | |
89bff2fc DH |
452 | SCM_SYMBOL (scm_unbound_variable_key, "unbound-variable"); |
453 | ||
454 | static void error_unbound_variable (SCM symbol) SCM_NORETURN; | |
455 | static void | |
456 | error_unbound_variable (SCM symbol) | |
457 | { | |
458 | scm_error (scm_unbound_variable_key, NULL, | |
459 | "Unbound variable: ~S", | |
460 | scm_list_1 (symbol), SCM_BOOL_F); | |
461 | } | |
462 | ||
463 | ||
f8769b1d MV |
464 | /* The Lookup Car Race |
465 | - by Eva Luator | |
466 | ||
467 | Memoization of variables and special forms is done while executing | |
468 | the code for the first time. As long as there is only one thread | |
469 | everything is fine, but as soon as two threads execute the same | |
470 | code concurrently `for the first time' they can come into conflict. | |
471 | ||
472 | This memoization includes rewriting variable references into more | |
473 | efficient forms and expanding macros. Furthermore, macro expansion | |
474 | includes `compiling' special forms like `let', `cond', etc. into | |
475 | tree-code instructions. | |
476 | ||
477 | There shouldn't normally be a problem with memoizing local and | |
904a077d | 478 | global variable references (into ilocs and variables), because all |
f8769b1d MV |
479 | threads will mutate the code in *exactly* the same way and (if I |
480 | read the C code correctly) it is not possible to observe a half-way | |
481 | mutated cons cell. The lookup procedure can handle this | |
482 | transparently without any critical sections. | |
483 | ||
484 | It is different with macro expansion, because macro expansion | |
485 | happens outside of the lookup procedure and can't be | |
904a077d MV |
486 | undone. Therefore the lookup procedure can't cope with it. It has |
487 | to indicate failure when it detects a lost race and hope that the | |
488 | caller can handle it. Luckily, it turns out that this is the case. | |
f8769b1d | 489 | |
904a077d | 490 | An example to illustrate this: Suppose that the following form will |
f8769b1d MV |
491 | be memoized concurrently by two threads |
492 | ||
493 | (let ((x 12)) x) | |
494 | ||
495 | Let's first examine the lookup of X in the body. The first thread | |
496 | decides that it has to find the symbol "x" in the environment and | |
497 | starts to scan it. Then the other thread takes over and actually | |
498 | overtakes the first. It looks up "x" and substitutes an | |
499 | appropriate iloc for it. Now the first thread continues and | |
500 | completes its lookup. It comes to exactly the same conclusions as | |
501 | the second one and could - without much ado - just overwrite the | |
502 | iloc with the same iloc. | |
503 | ||
504 | But let's see what will happen when the race occurs while looking | |
505 | up the symbol "let" at the start of the form. It could happen that | |
506 | the second thread interrupts the lookup of the first thread and not | |
904a077d MV |
507 | only substitutes a variable for it but goes right ahead and |
508 | replaces it with the compiled form (#@let* (x 12) x). Now, when | |
509 | the first thread completes its lookup, it would replace the #@let* | |
510 | with a variable containing the "let" binding, effectively reverting | |
511 | the form to (let (x 12) x). This is wrong. It has to detect that | |
512 | it has lost the race and the evaluator has to reconsider the | |
513 | changed form completely. | |
f8769b1d MV |
514 | |
515 | This race condition could be resolved with some kind of traffic | |
516 | light (like mutexes) around scm_lookupcar, but I think that it is | |
517 | best to avoid them in this case. They would serialize memoization | |
518 | completely and because lookup involves calling arbitrary Scheme | |
519 | code (via the lookup-thunk), threads could be blocked for an | |
520 | arbitrary amount of time or even deadlock. But with the current | |
521 | solution a lot of unnecessary work is potentially done. */ | |
522 | ||
9aa82b39 | 523 | /* SCM_LOOKUPCAR1 is what SCM_LOOKUPCAR used to be but is allowed to |
f8769b1d MV |
524 | return NULL to indicate a failed lookup due to some race conditions |
525 | between threads. This only happens when VLOC is the first cell of | |
526 | a special form that will eventually be memoized (like `let', etc.) | |
527 | In that case the whole lookup is bogus and the caller has to | |
528 | reconsider the complete special form. | |
529 | ||
530 | SCM_LOOKUPCAR is still there, of course. It just calls | |
de513fa0 | 531 | SCM_LOOKUPCAR1 and aborts on receiving NULL. So SCM_LOOKUPCAR |
f8769b1d MV |
532 | should only be called when it is known that VLOC is not the first |
533 | pair of a special form. Otherwise, use SCM_LOOKUPCAR1 and check | |
26d5b9b4 MD |
534 | for NULL. I think I've found the only places where this |
535 | applies. */ | |
f8769b1d | 536 | |
8ecf1f13 | 537 | static SCM * |
26d5b9b4 | 538 | scm_lookupcar1 (SCM vloc, SCM genv, int check) |
0f2d19dd JB |
539 | { |
540 | SCM env = genv; | |
e3173f93 | 541 | register SCM *al, fl, var = SCM_CAR (vloc); |
0f2d19dd | 542 | register SCM iloc = SCM_ILOC00; |
0f2d19dd JB |
543 | for (; SCM_NIMP (env); env = SCM_CDR (env)) |
544 | { | |
790071cd | 545 | if (!SCM_CONSP (SCM_CAR (env))) |
0f2d19dd | 546 | break; |
a23afe53 | 547 | al = SCM_CARLOC (env); |
0f2d19dd JB |
548 | for (fl = SCM_CAR (*al); SCM_NIMP (fl); fl = SCM_CDR (fl)) |
549 | { | |
01f11e02 | 550 | if (!SCM_CONSP (fl)) |
33b97402 | 551 | { |
cf498326 | 552 | if (SCM_EQ_P (fl, var)) |
0f2d19dd | 553 | { |
cf498326 | 554 | if (! SCM_EQ_P (SCM_CAR (vloc), var)) |
f8769b1d | 555 | goto race; |
3201d763 | 556 | SCM_SET_CELL_WORD_0 (vloc, SCM_UNPACK (iloc) + SCM_ICDR); |
a23afe53 | 557 | return SCM_CDRLOC (*al); |
0f2d19dd | 558 | } |
33b97402 MD |
559 | else |
560 | break; | |
561 | } | |
a23afe53 | 562 | al = SCM_CDRLOC (*al); |
cf498326 | 563 | if (SCM_EQ_P (SCM_CAR (fl), var)) |
0f2d19dd | 564 | { |
0f2d19dd JB |
565 | if (SCM_UNBNDP (SCM_CAR (*al))) |
566 | { | |
567 | env = SCM_EOL; | |
568 | goto errout; | |
569 | } | |
c6772927 | 570 | if (!SCM_EQ_P (SCM_CAR (vloc), var)) |
f8769b1d | 571 | goto race; |
a23afe53 | 572 | SCM_SETCAR (vloc, iloc); |
a23afe53 | 573 | return SCM_CARLOC (*al); |
0f2d19dd | 574 | } |
3201d763 | 575 | iloc = SCM_PACK (SCM_UNPACK (iloc) + SCM_IDINC); |
0f2d19dd | 576 | } |
3201d763 | 577 | iloc = SCM_PACK ((~SCM_IDSTMSK) & (SCM_UNPACK(iloc) + SCM_IFRINC)); |
0f2d19dd JB |
578 | } |
579 | { | |
86d31dfe | 580 | SCM top_thunk, real_var; |
790071cd | 581 | if (SCM_NIMP (env)) |
0f2d19dd | 582 | { |
86d31dfe MV |
583 | top_thunk = SCM_CAR (env); /* env now refers to a |
584 | top level env thunk */ | |
0f2d19dd JB |
585 | env = SCM_CDR (env); |
586 | } | |
587 | else | |
588 | top_thunk = SCM_BOOL_F; | |
86d31dfe MV |
589 | real_var = scm_sym2var (var, top_thunk, SCM_BOOL_F); |
590 | if (SCM_FALSEP (real_var)) | |
0f2d19dd | 591 | goto errout; |
86d31dfe | 592 | |
01f11e02 | 593 | if (!SCM_NULLP (env) || SCM_UNBNDP (SCM_VARIABLE_REF (real_var))) |
86d31dfe MV |
594 | { |
595 | errout: | |
86d31dfe MV |
596 | if (check) |
597 | { | |
598 | if (SCM_NULLP (env)) | |
89bff2fc | 599 | error_unbound_variable (var); |
86d31dfe MV |
600 | else |
601 | scm_misc_error (NULL, "Damaged environment: ~S", | |
8ea46249 | 602 | scm_list_1 (var)); |
86d31dfe MV |
603 | } |
604 | else | |
605 | { | |
606 | /* A variable could not be found, but we shall | |
607 | not throw an error. */ | |
608 | static SCM undef_object = SCM_UNDEFINED; | |
609 | return &undef_object; | |
610 | } | |
09e4d064 | 611 | } |
86d31dfe | 612 | |
c6772927 | 613 | if (!SCM_EQ_P (SCM_CAR (vloc), var)) |
86d31dfe MV |
614 | { |
615 | /* Some other thread has changed the very cell we are working | |
616 | on. In effect, it must have done our job or messed it up | |
617 | completely. */ | |
618 | race: | |
619 | var = SCM_CAR (vloc); | |
d22a0ea1 MV |
620 | if (SCM_VARIABLEP (var)) |
621 | return SCM_VARIABLE_LOC (var); | |
86d31dfe MV |
622 | if (SCM_ITAG7 (var) == SCM_ITAG7 (SCM_ILOC00)) |
623 | return scm_ilookup (var, genv); | |
904a077d | 624 | /* We can't cope with anything else than variables and ilocs. When |
86d31dfe MV |
625 | a special form has been memoized (i.e. `let' into `#@let') we |
626 | return NULL and expect the calling function to do the right | |
627 | thing. For the evaluator, this means going back and redoing | |
628 | the dispatch on the car of the form. */ | |
629 | return NULL; | |
630 | } | |
f8769b1d | 631 | |
d22a0ea1 | 632 | SCM_SETCAR (vloc, real_var); |
86d31dfe MV |
633 | return SCM_VARIABLE_LOC (real_var); |
634 | } | |
0f2d19dd JB |
635 | } |
636 | ||
f8769b1d | 637 | SCM * |
6e8d25a6 | 638 | scm_lookupcar (SCM vloc, SCM genv, int check) |
f8769b1d | 639 | { |
26d5b9b4 | 640 | SCM *loc = scm_lookupcar1 (vloc, genv, check); |
f8769b1d MV |
641 | if (loc == NULL) |
642 | abort (); | |
643 | return loc; | |
644 | } | |
f8769b1d | 645 | |
2a6f7afe DH |
646 | /* Return true if the symbol is - from the point of view of a macro |
647 | * transformer - a literal in the sense specified in chapter "pattern | |
648 | * language" of R5RS. In the code below, however, we don't match the | |
649 | * definition of R5RS exactly: It returns true if the identifier has no | |
650 | * binding or if it is a syntactic keyword. */ | |
651 | static int | |
652 | literal_p (const SCM symbol, const SCM env) | |
653 | { | |
654 | const SCM x = scm_cons (symbol, SCM_UNDEFINED); | |
655 | const SCM value = *scm_lookupcar (x, env, 0); | |
656 | if (SCM_UNBNDP (value) || SCM_MACROP (value)) | |
657 | return 1; | |
658 | else | |
659 | return 0; | |
660 | } | |
661 | ||
1cc91f1b | 662 | |
0f2d19dd | 663 | SCM |
6e8d25a6 | 664 | scm_eval_car (SCM pair, SCM env) |
0f2d19dd | 665 | { |
6cb702da | 666 | return SCM_XEVALCAR (pair, env); |
0f2d19dd JB |
667 | } |
668 | ||
669 | \f | |
670 | /* | |
671 | * The following rewrite expressions and | |
672 | * some memoized forms have different syntax | |
673 | */ | |
674 | ||
85db4a2c DH |
675 | SCM_GLOBAL_SYMBOL (scm_sym_else, "else"); |
676 | SCM_GLOBAL_SYMBOL (scm_sym_unquote, "unquote"); | |
677 | SCM_GLOBAL_SYMBOL (scm_sym_uq_splicing, "unquote-splicing"); | |
81123e6d | 678 | |
85db4a2c DH |
679 | SCM_GLOBAL_SYMBOL (scm_sym_enter_frame, "enter-frame"); |
680 | SCM_GLOBAL_SYMBOL (scm_sym_apply_frame, "apply-frame"); | |
681 | SCM_GLOBAL_SYMBOL (scm_sym_exit_frame, "exit-frame"); | |
682 | SCM_GLOBAL_SYMBOL (scm_sym_trace, "trace"); | |
0f2d19dd | 683 | |
0f2d19dd | 684 | |
34adf7ea DH |
685 | /* Rewrite the body (which is given as the list of expressions forming the |
686 | * body) into its internal form. The internal form of a body (<expr> ...) is | |
687 | * just the body itself, but prefixed with an ISYM that denotes to what kind | |
688 | * of outer construct this body belongs: (<ISYM> <expr> ...). A lambda body | |
689 | * starts with SCM_IM_LAMBDA, for example, a body of a let starts with | |
690 | * SCM_IM_LET, etc. The one exception is a body that belongs to a letrec that | |
691 | * has been formed by rewriting internal defines: It starts with SCM_IM_DEFINE | |
692 | * (instead of SCM_IM_LETREC). | |
693 | * | |
694 | * It is assumed that the calling expression has already made sure that the | |
695 | * body is a proper list. */ | |
26d5b9b4 | 696 | static SCM |
34adf7ea | 697 | scm_m_body (SCM op, SCM exprs) |
26d5b9b4 | 698 | { |
26d5b9b4 | 699 | /* Don't add another ISYM if one is present already. */ |
34adf7ea DH |
700 | if (SCM_ISYMP (SCM_CAR (exprs))) |
701 | return exprs; | |
702 | else | |
703 | return scm_cons (op, exprs); | |
26d5b9b4 MD |
704 | } |
705 | ||
1cc91f1b | 706 | |
9fbee57e | 707 | /* Start of the memoizers for the standard R5RS builtin macros. */ |
0f2d19dd JB |
708 | |
709 | ||
3b88ed2a | 710 | SCM_SYNTAX (s_and, "and", scm_i_makbimacro, scm_m_and); |
8ea46249 | 711 | SCM_GLOBAL_SYMBOL (scm_sym_and, s_and); |
1cc91f1b | 712 | |
8ea46249 | 713 | SCM |
e6729603 | 714 | scm_m_and (SCM expr, SCM env SCM_UNUSED) |
0f2d19dd | 715 | { |
e6729603 DH |
716 | const SCM cdr_expr = SCM_CDR (expr); |
717 | const long length = scm_ilength (cdr_expr); | |
718 | ||
719 | ASSERT_SYNTAX (length >= 0, s_bad_expression, expr); | |
720 | ||
721 | if (length == 0) | |
722 | { | |
723 | /* Special case: (and) is replaced by #t. */ | |
724 | return SCM_BOOL_T; | |
725 | } | |
0f2d19dd | 726 | else |
e6729603 DH |
727 | { |
728 | SCM_SETCAR (expr, SCM_IM_AND); | |
729 | return expr; | |
730 | } | |
0f2d19dd JB |
731 | } |
732 | ||
1cc91f1b | 733 | |
3b88ed2a | 734 | SCM_SYNTAX (s_begin, "begin", scm_i_makbimacro, scm_m_begin); |
9fbee57e | 735 | SCM_GLOBAL_SYMBOL (scm_sym_begin, s_begin); |
8ea46249 DH |
736 | |
737 | SCM | |
2a6f7afe | 738 | scm_m_begin (SCM expr, SCM env SCM_UNUSED) |
0f2d19dd | 739 | { |
2a6f7afe | 740 | const SCM cdr_expr = SCM_CDR (expr); |
21628685 DH |
741 | /* Dirk:FIXME:: An empty begin clause is not generally allowed by R5RS. |
742 | * That means, there should be a distinction between uses of begin where an | |
743 | * empty clause is OK and where it is not. */ | |
2a6f7afe DH |
744 | ASSERT_SYNTAX (scm_ilength (cdr_expr) >= 0, s_bad_expression, expr); |
745 | ||
746 | SCM_SETCAR (expr, SCM_IM_BEGIN); | |
747 | return expr; | |
0f2d19dd JB |
748 | } |
749 | ||
750 | ||
3b88ed2a | 751 | SCM_SYNTAX (s_case, "case", scm_i_makbimacro, scm_m_case); |
8ea46249 | 752 | SCM_GLOBAL_SYMBOL (scm_sym_case, s_case); |
1cc91f1b | 753 | |
8ea46249 | 754 | SCM |
2a6f7afe | 755 | scm_m_case (SCM expr, SCM env) |
0f2d19dd | 756 | { |
8ea46249 | 757 | SCM clauses; |
2a6f7afe DH |
758 | SCM all_labels = SCM_EOL; |
759 | ||
760 | /* Check, whether 'else is a literal, i. e. not bound to a value. */ | |
761 | const int else_literal_p = literal_p (scm_sym_else, env); | |
762 | ||
763 | const SCM cdr_expr = SCM_CDR (expr); | |
764 | ASSERT_SYNTAX (scm_ilength (cdr_expr) >= 0, s_bad_expression, expr); | |
765 | ASSERT_SYNTAX (scm_ilength (cdr_expr) >= 2, s_missing_clauses, expr); | |
766 | ||
767 | clauses = SCM_CDR (cdr_expr); | |
8ea46249 | 768 | while (!SCM_NULLP (clauses)) |
0f2d19dd | 769 | { |
2a6f7afe DH |
770 | SCM labels; |
771 | ||
772 | const SCM clause = SCM_CAR (clauses); | |
773 | ASSERT_SYNTAX_2 (scm_ilength (clause) >= 2, | |
774 | s_bad_case_clause, clause, expr); | |
775 | ||
776 | labels = SCM_CAR (clause); | |
777 | if (SCM_CONSP (labels)) | |
778 | { | |
779 | ASSERT_SYNTAX_2 (scm_ilength (labels) >= 0, | |
780 | s_bad_case_labels, labels, expr); | |
781 | all_labels = scm_append_x (scm_list_2 (labels, all_labels)); | |
782 | } | |
58a2510b DH |
783 | else if (SCM_NULLP (labels)) |
784 | { | |
785 | /* The list of labels is empty. According to R5RS this is allowed. | |
786 | * It means that the sequence of expressions will never be executed. | |
787 | * Therefore, as an optimization, we could remove the whole | |
788 | * clause. */ | |
789 | } | |
2a6f7afe DH |
790 | else |
791 | { | |
792 | ASSERT_SYNTAX_2 (SCM_EQ_P (labels, scm_sym_else) && else_literal_p, | |
793 | s_bad_case_labels, labels, expr); | |
794 | ASSERT_SYNTAX_2 (SCM_NULLP (SCM_CDR (clauses)), | |
609a8b86 | 795 | s_misplaced_else_clause, clause, expr); |
2a6f7afe DH |
796 | } |
797 | ||
798 | /* build the new clause */ | |
799 | if (SCM_EQ_P (labels, scm_sym_else)) | |
800 | SCM_SETCAR (clause, SCM_IM_ELSE); | |
801 | ||
8ea46249 | 802 | clauses = SCM_CDR (clauses); |
0f2d19dd | 803 | } |
2a6f7afe DH |
804 | |
805 | /* Check whether all case labels are distinct. */ | |
806 | for (; !SCM_NULLP (all_labels); all_labels = SCM_CDR (all_labels)) | |
807 | { | |
808 | const SCM label = SCM_CAR (all_labels); | |
4610b011 DH |
809 | ASSERT_SYNTAX_2 (SCM_FALSEP (scm_c_memq (label, SCM_CDR (all_labels))), |
810 | s_duplicate_case_label, label, expr); | |
2a6f7afe DH |
811 | } |
812 | ||
813 | SCM_SETCAR (expr, SCM_IM_CASE); | |
814 | return expr; | |
0f2d19dd JB |
815 | } |
816 | ||
817 | ||
3b88ed2a | 818 | SCM_SYNTAX (s_cond, "cond", scm_i_makbimacro, scm_m_cond); |
8ea46249 | 819 | SCM_GLOBAL_SYMBOL (scm_sym_cond, s_cond); |
609a8b86 | 820 | SCM_GLOBAL_SYMBOL (scm_sym_arrow, "=>"); |
1cc91f1b | 821 | |
8ea46249 | 822 | SCM |
609a8b86 | 823 | scm_m_cond (SCM expr, SCM env) |
0f2d19dd | 824 | { |
609a8b86 DH |
825 | /* Check, whether 'else or '=> is a literal, i. e. not bound to a value. */ |
826 | const int else_literal_p = literal_p (scm_sym_else, env); | |
827 | const int arrow_literal_p = literal_p (scm_sym_arrow, env); | |
828 | ||
829 | const SCM clauses = SCM_CDR (expr); | |
830 | SCM clause_idx; | |
831 | ||
832 | ASSERT_SYNTAX (scm_ilength (clauses) >= 0, s_bad_expression, expr); | |
833 | ASSERT_SYNTAX (scm_ilength (clauses) >= 1, s_missing_clauses, expr); | |
834 | ||
835 | for (clause_idx = clauses; | |
836 | !SCM_NULLP (clause_idx); | |
837 | clause_idx = SCM_CDR (clause_idx)) | |
0f2d19dd | 838 | { |
609a8b86 DH |
839 | SCM test; |
840 | ||
841 | const SCM clause = SCM_CAR (clause_idx); | |
842 | const long length = scm_ilength (clause); | |
843 | ASSERT_SYNTAX_2 (length >= 1, s_bad_cond_clause, clause, expr); | |
844 | ||
845 | test = SCM_CAR (clause); | |
846 | if (SCM_EQ_P (test, scm_sym_else) && else_literal_p) | |
0f2d19dd | 847 | { |
609a8b86 DH |
848 | const int last_clause_p = SCM_NULLP (SCM_CDR (clause_idx)); |
849 | ASSERT_SYNTAX_2 (length >= 2, | |
850 | s_bad_cond_clause, clause, expr); | |
851 | ASSERT_SYNTAX_2 (last_clause_p, | |
852 | s_misplaced_else_clause, clause, expr); | |
853 | SCM_SETCAR (clause, SCM_IM_ELSE); | |
0f2d19dd | 854 | } |
609a8b86 DH |
855 | else if (length >= 2 |
856 | && SCM_EQ_P (SCM_CADR (clause), scm_sym_arrow) | |
857 | && arrow_literal_p) | |
858 | { | |
859 | ASSERT_SYNTAX_2 (length > 2, s_missing_recipient, clause, expr); | |
860 | ASSERT_SYNTAX_2 (length == 3, s_extra_expression, clause, expr); | |
861 | SCM_SETCAR (SCM_CDR (clause), SCM_IM_ARROW); | |
8ea46249 | 862 | } |
0f2d19dd | 863 | } |
609a8b86 DH |
864 | |
865 | SCM_SETCAR (expr, SCM_IM_COND); | |
866 | return expr; | |
0f2d19dd JB |
867 | } |
868 | ||
1cc91f1b | 869 | |
0f572ba7 DH |
870 | SCM_SYNTAX (s_define, "define", scm_i_makbimacro, scm_m_define); |
871 | SCM_GLOBAL_SYMBOL (scm_sym_define, s_define); | |
5280aaca | 872 | |
9fbee57e DH |
873 | /* Guile provides an extension to R5RS' define syntax to represent function |
874 | * currying in a compact way. With this extension, it is allowed to write | |
875 | * (define <nested-variable> <body>), where <nested-variable> has of one of | |
876 | * the forms (<nested-variable> <formals>), (<nested-variable> . <formal>), | |
877 | * (<variable> <formals>) or (<variable> . <formal>). As in R5RS, <formals> | |
878 | * should be either a sequence of zero or more variables, or a sequence of one | |
879 | * or more variables followed by a space-delimited period and another | |
880 | * variable. Each level of argument nesting wraps the <body> within another | |
881 | * lambda expression. For example, the following forms are allowed, each one | |
882 | * followed by an equivalent, more explicit implementation. | |
883 | * Example 1: | |
884 | * (define ((a b . c) . d) <body>) is equivalent to | |
885 | * (define a (lambda (b . c) (lambda d <body>))) | |
886 | * Example 2: | |
887 | * (define (((a) b) c . d) <body>) is equivalent to | |
888 | * (define a (lambda () (lambda (b) (lambda (c . d) <body>)))) | |
889 | */ | |
890 | /* Dirk:FIXME:: We should provide an implementation for 'define' in the R5RS | |
891 | * module that does not implement this extension. */ | |
0f572ba7 DH |
892 | static SCM |
893 | canonicalize_define (const SCM expr) | |
5280aaca | 894 | { |
cc56ba80 DH |
895 | SCM body; |
896 | SCM variable; | |
897 | ||
898 | const SCM cdr_expr = SCM_CDR (expr); | |
cc56ba80 DH |
899 | ASSERT_SYNTAX (scm_ilength (cdr_expr) >= 2, s_missing_expression, expr); |
900 | ||
901 | body = SCM_CDR (cdr_expr); | |
902 | variable = SCM_CAR (cdr_expr); | |
903 | while (SCM_CONSP (variable)) | |
5280aaca | 904 | { |
cc56ba80 DH |
905 | /* This while loop realizes function currying by variable nesting. |
906 | * Variable is known to be a nested-variable. In every iteration of the | |
907 | * loop another level of lambda expression is created, starting with the | |
4610b011 DH |
908 | * innermost one. Note that we don't check for duplicate formals here: |
909 | * This will be done by the memoizer of the lambda expression. */ | |
cc56ba80 DH |
910 | const SCM formals = SCM_CDR (variable); |
911 | const SCM tail = scm_cons (formals, body); | |
912 | ||
913 | /* Add source properties to each new lambda expression: */ | |
914 | const SCM lambda = scm_cons_source (variable, scm_sym_lambda, tail); | |
915 | ||
916 | body = scm_list_1 (lambda); | |
917 | variable = SCM_CAR (variable); | |
5280aaca | 918 | } |
cc56ba80 DH |
919 | ASSERT_SYNTAX_2 (SCM_SYMBOLP (variable), s_bad_variable, variable, expr); |
920 | ASSERT_SYNTAX (scm_ilength (body) == 1, s_expression, expr); | |
921 | ||
0f572ba7 DH |
922 | SCM_SETCAR (cdr_expr, variable); |
923 | SCM_SETCDR (cdr_expr, body); | |
924 | return expr; | |
925 | } | |
926 | ||
927 | SCM | |
928 | scm_m_define (SCM expr, SCM env) | |
929 | { | |
930 | SCM canonical_definition; | |
931 | SCM cdr_canonical_definition; | |
932 | SCM body; | |
933 | ||
934 | ASSERT_SYNTAX (scm_ilength (expr) >= 0, s_bad_expression, expr); | |
935 | ||
936 | canonical_definition = canonicalize_define (expr); | |
937 | cdr_canonical_definition = SCM_CDR (canonical_definition); | |
938 | body = SCM_CDR (cdr_canonical_definition); | |
939 | ||
9fbee57e | 940 | if (SCM_TOP_LEVEL (env)) |
0f2d19dd | 941 | { |
9fbee57e | 942 | SCM var; |
0f572ba7 | 943 | const SCM variable = SCM_CAR (cdr_canonical_definition); |
cc56ba80 | 944 | const SCM value = scm_eval_car (body, env); |
9fbee57e DH |
945 | if (SCM_REC_PROCNAMES_P) |
946 | { | |
cc56ba80 | 947 | SCM tmp = value; |
9fbee57e DH |
948 | while (SCM_MACROP (tmp)) |
949 | tmp = SCM_MACRO_CODE (tmp); | |
950 | if (SCM_CLOSUREP (tmp) | |
951 | /* Only the first definition determines the name. */ | |
952 | && SCM_FALSEP (scm_procedure_property (tmp, scm_sym_name))) | |
cc56ba80 | 953 | scm_set_procedure_property_x (tmp, scm_sym_name, variable); |
9fbee57e | 954 | } |
cc56ba80 DH |
955 | var = scm_sym2var (variable, scm_env_top_level (env), SCM_BOOL_T); |
956 | SCM_VARIABLE_SET (var, value); | |
9fbee57e | 957 | return SCM_UNSPECIFIED; |
26d5b9b4 | 958 | } |
9fbee57e | 959 | else |
cc56ba80 | 960 | { |
0f572ba7 DH |
961 | SCM_SETCAR (canonical_definition, SCM_IM_DEFINE); |
962 | return canonical_definition; | |
cc56ba80 | 963 | } |
0f2d19dd JB |
964 | } |
965 | ||
966 | ||
8ae95199 DH |
967 | /* This is a helper function for forms (<keyword> <expression>) that are |
968 | * transformed into (#@<keyword> '() <memoized_expression>) in order to allow | |
969 | * for easy creation of a thunk (i. e. a closure without arguments) using the | |
970 | * ('() <memoized_expression>) tail of the memoized form. */ | |
971 | static SCM | |
972 | memoize_as_thunk_prototype (const SCM expr, const SCM env SCM_UNUSED) | |
973 | { | |
974 | const SCM cdr_expr = SCM_CDR (expr); | |
975 | ASSERT_SYNTAX (scm_ilength (cdr_expr) >= 0, s_bad_expression, expr); | |
976 | ASSERT_SYNTAX (scm_ilength (cdr_expr) == 1, s_expression, expr); | |
977 | ||
978 | SCM_SETCDR (expr, scm_cons (SCM_EOL, cdr_expr)); | |
979 | ||
980 | return expr; | |
981 | } | |
982 | ||
983 | ||
3b88ed2a | 984 | SCM_SYNTAX (s_delay, "delay", scm_i_makbimacro, scm_m_delay); |
9fbee57e | 985 | SCM_GLOBAL_SYMBOL (scm_sym_delay, s_delay); |
1cc91f1b | 986 | |
9fbee57e DH |
987 | /* Promises are implemented as closures with an empty parameter list. Thus, |
988 | * (delay <expression>) is transformed into (#@delay '() <expression>), where | |
989 | * the empty list represents the empty parameter list. This representation | |
990 | * allows for easy creation of the closure during evaluation. */ | |
8ea46249 | 991 | SCM |
8ae95199 | 992 | scm_m_delay (SCM expr, SCM env) |
0f2d19dd | 993 | { |
8ae95199 DH |
994 | const SCM new_expr = memoize_as_thunk_prototype (expr, env); |
995 | SCM_SETCAR (new_expr, SCM_IM_DELAY); | |
996 | return new_expr; | |
0f2d19dd JB |
997 | } |
998 | ||
8ea46249 | 999 | |
a954ce1d DH |
1000 | SCM_SYNTAX(s_do, "do", scm_i_makbimacro, scm_m_do); |
1001 | SCM_GLOBAL_SYMBOL(scm_sym_do, s_do); | |
1002 | ||
302c12b4 | 1003 | /* DO gets the most radically altered syntax. The order of the vars is |
4610b011 DH |
1004 | * reversed here. During the evaluation this allows for simple consing of the |
1005 | * results of the inits and steps: | |
302c12b4 | 1006 | |
0f2d19dd | 1007 | (do ((<var1> <init1> <step1>) |
a954ce1d DH |
1008 | (<var2> <init2>) |
1009 | ... ) | |
1010 | (<test> <return>) | |
1011 | <body>) | |
302c12b4 | 1012 | |
0f2d19dd | 1013 | ;; becomes |
302c12b4 | 1014 | |
e681d187 | 1015 | (#@do (<init1> <init2> ... <initn>) |
a954ce1d DH |
1016 | (varn ... var2 var1) |
1017 | (<test> <return>) | |
1018 | (<body>) | |
1019 | <step1> <step2> ... <stepn>) ;; missing steps replaced by var | |
302c12b4 | 1020 | */ |
0f2d19dd | 1021 | SCM |
a954ce1d | 1022 | scm_m_do (SCM expr, SCM env SCM_UNUSED) |
0f2d19dd | 1023 | { |
a954ce1d DH |
1024 | SCM variables = SCM_EOL; |
1025 | SCM init_forms = SCM_EOL; | |
1026 | SCM step_forms = SCM_EOL; | |
1027 | SCM binding_idx; | |
1028 | SCM cddr_expr; | |
1029 | SCM exit_clause; | |
1030 | SCM commands; | |
1031 | SCM tail; | |
1032 | ||
1033 | const SCM cdr_expr = SCM_CDR (expr); | |
1034 | ASSERT_SYNTAX (scm_ilength (cdr_expr) >= 0, s_bad_expression, expr); | |
1035 | ASSERT_SYNTAX (scm_ilength (cdr_expr) >= 2, s_missing_expression, expr); | |
1036 | ||
1037 | /* Collect variables, init and step forms. */ | |
1038 | binding_idx = SCM_CAR (cdr_expr); | |
1039 | ASSERT_SYNTAX_2 (scm_ilength (binding_idx) >= 0, | |
1040 | s_bad_bindings, binding_idx, expr); | |
1041 | for (; !SCM_NULLP (binding_idx); binding_idx = SCM_CDR (binding_idx)) | |
0f2d19dd | 1042 | { |
a954ce1d DH |
1043 | const SCM binding = SCM_CAR (binding_idx); |
1044 | const long length = scm_ilength (binding); | |
1045 | ASSERT_SYNTAX_2 (length == 2 || length == 3, | |
1046 | s_bad_binding, binding, expr); | |
1047 | ||
302c12b4 | 1048 | { |
a954ce1d DH |
1049 | const SCM name = SCM_CAR (binding); |
1050 | const SCM init = SCM_CADR (binding); | |
1051 | const SCM step = (length == 2) ? name : SCM_CADDR (binding); | |
1052 | ASSERT_SYNTAX_2 (SCM_SYMBOLP (name), s_bad_variable, name, expr); | |
4610b011 DH |
1053 | ASSERT_SYNTAX_2 (SCM_FALSEP (scm_c_memq (name, variables)), |
1054 | s_duplicate_binding, name, expr); | |
1055 | ||
a954ce1d DH |
1056 | variables = scm_cons (name, variables); |
1057 | init_forms = scm_cons (init, init_forms); | |
1058 | step_forms = scm_cons (step, step_forms); | |
302c12b4 | 1059 | } |
0f2d19dd | 1060 | } |
a954ce1d DH |
1061 | init_forms = scm_reverse_x (init_forms, SCM_UNDEFINED); |
1062 | step_forms = scm_reverse_x (step_forms, SCM_UNDEFINED); | |
1063 | ||
1064 | /* Memoize the test form and the exit sequence. */ | |
1065 | cddr_expr = SCM_CDR (cdr_expr); | |
1066 | exit_clause = SCM_CAR (cddr_expr); | |
1067 | ASSERT_SYNTAX_2 (scm_ilength (exit_clause) >= 1, | |
1068 | s_bad_exit_clause, exit_clause, expr); | |
1069 | ||
1070 | commands = SCM_CDR (cddr_expr); | |
1071 | tail = scm_cons2 (exit_clause, commands, step_forms); | |
1072 | tail = scm_cons2 (init_forms, variables, tail); | |
1073 | SCM_SETCAR (expr, SCM_IM_DO); | |
1074 | SCM_SETCDR (expr, tail); | |
1075 | return expr; | |
0f2d19dd JB |
1076 | } |
1077 | ||
b8229a3b | 1078 | |
3b88ed2a | 1079 | SCM_SYNTAX (s_if, "if", scm_i_makbimacro, scm_m_if); |
9fbee57e | 1080 | SCM_GLOBAL_SYMBOL (scm_sym_if, s_if); |
b8229a3b | 1081 | |
9fbee57e | 1082 | SCM |
4610b011 | 1083 | scm_m_if (SCM expr, SCM env SCM_UNUSED) |
0f2d19dd | 1084 | { |
4610b011 DH |
1085 | const SCM cdr_expr = SCM_CDR (expr); |
1086 | const long length = scm_ilength (cdr_expr); | |
1087 | ASSERT_SYNTAX (length == 2 || length == 3, s_expression, expr); | |
1088 | SCM_SETCAR (expr, SCM_IM_IF); | |
1089 | return expr; | |
0f2d19dd JB |
1090 | } |
1091 | ||
302c12b4 | 1092 | |
3b88ed2a | 1093 | SCM_SYNTAX (s_lambda, "lambda", scm_i_makbimacro, scm_m_lambda); |
9fbee57e | 1094 | SCM_GLOBAL_SYMBOL (scm_sym_lambda, s_lambda); |
0f2d19dd | 1095 | |
4610b011 DH |
1096 | /* A helper function for memoize_lambda to support checking for duplicate |
1097 | * formal arguments: Return true if OBJ is `eq?' to one of the elements of | |
1098 | * LIST or to the cdr of the last cons. Therefore, LIST may have any of the | |
1099 | * forms that a formal argument can have: | |
1100 | * <rest>, (<arg1> ...), (<arg1> ... . <rest>) */ | |
9fbee57e | 1101 | static int |
4610b011 | 1102 | c_improper_memq (SCM obj, SCM list) |
5cb22e96 | 1103 | { |
9fbee57e DH |
1104 | for (; SCM_CONSP (list); list = SCM_CDR (list)) |
1105 | { | |
1106 | if (SCM_EQ_P (SCM_CAR (list), obj)) | |
4610b011 | 1107 | return 1; |
9fbee57e DH |
1108 | } |
1109 | return SCM_EQ_P (list, obj); | |
5cb22e96 DH |
1110 | } |
1111 | ||
28d52ebb | 1112 | SCM |
03a3e941 | 1113 | scm_m_lambda (SCM expr, SCM env SCM_UNUSED) |
28d52ebb | 1114 | { |
9fbee57e | 1115 | SCM formals; |
03a3e941 | 1116 | SCM formals_idx; |
34adf7ea DH |
1117 | SCM cddr_expr; |
1118 | int documentation; | |
1119 | SCM body; | |
1120 | SCM new_body; | |
03a3e941 DH |
1121 | |
1122 | const SCM cdr_expr = SCM_CDR (expr); | |
1123 | const long length = scm_ilength (cdr_expr); | |
1124 | ASSERT_SYNTAX (length >= 0, s_bad_expression, expr); | |
1125 | ASSERT_SYNTAX (length >= 2, s_missing_expression, expr); | |
28d52ebb | 1126 | |
03a3e941 DH |
1127 | /* Before iterating the list of formal arguments, make sure the formals |
1128 | * actually are given as either a symbol or a non-cyclic list. */ | |
1129 | formals = SCM_CAR (cdr_expr); | |
1130 | if (SCM_CONSP (formals)) | |
1131 | { | |
1132 | /* Dirk:FIXME:: We should check for a cyclic list of formals, and if | |
1133 | * detected, report a 'Bad formals' error. */ | |
1134 | } | |
1135 | else | |
1136 | { | |
1137 | ASSERT_SYNTAX_2 (SCM_SYMBOLP (formals) || SCM_NULLP (formals), | |
1138 | s_bad_formals, formals, expr); | |
1139 | } | |
1cc91f1b | 1140 | |
03a3e941 DH |
1141 | /* Now iterate the list of formal arguments to check if all formals are |
1142 | * symbols, and that there are no duplicates. */ | |
1143 | formals_idx = formals; | |
1144 | while (SCM_CONSP (formals_idx)) | |
0f2d19dd | 1145 | { |
03a3e941 DH |
1146 | const SCM formal = SCM_CAR (formals_idx); |
1147 | const SCM next_idx = SCM_CDR (formals_idx); | |
1148 | ASSERT_SYNTAX_2 (SCM_SYMBOLP (formal), s_bad_formal, formal, expr); | |
1149 | ASSERT_SYNTAX_2 (!c_improper_memq (formal, next_idx), | |
1150 | s_duplicate_formal, formal, expr); | |
1151 | formals_idx = next_idx; | |
0f2d19dd | 1152 | } |
03a3e941 DH |
1153 | ASSERT_SYNTAX_2 (SCM_NULLP (formals_idx) || SCM_SYMBOLP (formals_idx), |
1154 | s_bad_formal, formals_idx, expr); | |
9fbee57e | 1155 | |
34adf7ea DH |
1156 | /* Memoize the body. Keep a potential documentation string. */ |
1157 | /* Dirk:FIXME:: We should probably extract the documentation string to | |
1158 | * some external database. Otherwise it will slow down execution, since | |
1159 | * the documentation string will have to be skipped with every execution | |
1160 | * of the closure. */ | |
1161 | cddr_expr = SCM_CDR (cdr_expr); | |
1162 | documentation = (length >= 3 && SCM_STRINGP (SCM_CAR (cddr_expr))); | |
1163 | body = documentation ? SCM_CDR (cddr_expr) : cddr_expr; | |
1164 | new_body = scm_m_body (SCM_IM_LAMBDA, body); | |
1165 | ||
1166 | SCM_SETCAR (expr, SCM_IM_LAMBDA); | |
1167 | if (documentation) | |
1168 | SCM_SETCDR (cddr_expr, new_body); | |
1169 | else | |
1170 | SCM_SETCDR (cdr_expr, new_body); | |
1171 | return expr; | |
0f2d19dd | 1172 | } |
6dbd0af5 | 1173 | |
0f2d19dd | 1174 | |
d6754c23 | 1175 | /* Check if the format of the bindings is ((<symbol> <init-form>) ...). */ |
302c12b4 | 1176 | static void |
d6754c23 | 1177 | check_bindings (const SCM bindings, const SCM expr) |
0f2d19dd | 1178 | { |
d6754c23 | 1179 | SCM binding_idx; |
302c12b4 | 1180 | |
d6754c23 DH |
1181 | ASSERT_SYNTAX_2 (scm_ilength (bindings) >= 0, |
1182 | s_bad_bindings, bindings, expr); | |
0f2d19dd | 1183 | |
d6754c23 DH |
1184 | binding_idx = bindings; |
1185 | for (; !SCM_NULLP (binding_idx); binding_idx = SCM_CDR (binding_idx)) | |
0f2d19dd | 1186 | { |
d6754c23 DH |
1187 | SCM name; /* const */ |
1188 | ||
1189 | const SCM binding = SCM_CAR (binding_idx); | |
1190 | ASSERT_SYNTAX_2 (scm_ilength (binding) == 2, | |
1191 | s_bad_binding, binding, expr); | |
1192 | ||
1193 | name = SCM_CAR (binding); | |
1194 | ASSERT_SYNTAX_2 (SCM_SYMBOLP (name), s_bad_variable, name, expr); | |
0f2d19dd | 1195 | } |
d6754c23 | 1196 | } |
26d5b9b4 | 1197 | |
d6754c23 DH |
1198 | |
1199 | /* The bindings, which must have the format ((v1 i1) (v2 i2) ... (vn in)), are | |
1200 | * transformed to the lists (vn ... v2 v1) and (i1 i2 ... in). That is, the | |
1201 | * variables are returned in a list with their order reversed, and the init | |
1202 | * forms are returned in a list in the same order as they are given in the | |
1203 | * bindings. If a duplicate variable name is detected, an error is | |
1204 | * signalled. */ | |
1205 | static void | |
1206 | transform_bindings ( | |
1207 | const SCM bindings, const SCM expr, | |
1208 | SCM *const rvarptr, SCM *const initptr ) | |
1209 | { | |
1210 | SCM rvariables = SCM_EOL; | |
1211 | SCM rinits = SCM_EOL; | |
1212 | SCM binding_idx = bindings; | |
1213 | for (; !SCM_NULLP (binding_idx); binding_idx = SCM_CDR (binding_idx)) | |
1214 | { | |
1215 | const SCM binding = SCM_CAR (binding_idx); | |
1216 | const SCM cdr_binding = SCM_CDR (binding); | |
1217 | const SCM name = SCM_CAR (binding); | |
1218 | ASSERT_SYNTAX_2 (SCM_FALSEP (scm_c_memq (name, rvariables)), | |
1219 | s_duplicate_binding, name, expr); | |
1220 | rvariables = scm_cons (name, rvariables); | |
1221 | rinits = scm_cons (SCM_CAR (cdr_binding), rinits); | |
1222 | } | |
1223 | *rvarptr = rvariables; | |
1224 | *initptr = scm_reverse_x (rinits, SCM_UNDEFINED); | |
0f2d19dd JB |
1225 | } |
1226 | ||
302c12b4 | 1227 | |
3b88ed2a | 1228 | SCM_SYNTAX(s_let, "let", scm_i_makbimacro, scm_m_let); |
2f0d1375 | 1229 | SCM_GLOBAL_SYMBOL(scm_sym_let, s_let); |
b8229a3b | 1230 | |
d6754c23 DH |
1231 | /* This function is a helper function for memoize_let. It transforms |
1232 | * (let name ((var init) ...) body ...) into | |
1233 | * ((letrec ((name (lambda (var ...) body ...))) name) init ...) | |
1234 | * and memoizes the expression. It is assumed that the caller has checked | |
1235 | * that name is a symbol and that there are bindings and a body. */ | |
1236 | static SCM | |
1237 | memoize_named_let (const SCM expr, const SCM env SCM_UNUSED) | |
1238 | { | |
1239 | SCM rvariables; | |
1240 | SCM variables; | |
1241 | SCM inits; | |
1242 | ||
1243 | const SCM cdr_expr = SCM_CDR (expr); | |
1244 | const SCM name = SCM_CAR (cdr_expr); | |
1245 | const SCM cddr_expr = SCM_CDR (cdr_expr); | |
1246 | const SCM bindings = SCM_CAR (cddr_expr); | |
1247 | check_bindings (bindings, expr); | |
1248 | ||
1249 | transform_bindings (bindings, expr, &rvariables, &inits); | |
1250 | variables = scm_reverse_x (rvariables, SCM_UNDEFINED); | |
1251 | ||
1252 | { | |
1253 | const SCM let_body = SCM_CDR (cddr_expr); | |
34adf7ea | 1254 | const SCM lambda_body = scm_m_body (SCM_IM_LET, let_body); |
d6754c23 DH |
1255 | const SCM lambda_tail = scm_cons (variables, lambda_body); |
1256 | const SCM lambda_form = scm_cons_source (expr, scm_sym_lambda, lambda_tail); | |
1257 | ||
1258 | const SCM rvar = scm_list_1 (name); | |
1259 | const SCM init = scm_list_1 (lambda_form); | |
34adf7ea | 1260 | const SCM body = scm_m_body (SCM_IM_LET, scm_list_1 (name)); |
d6754c23 DH |
1261 | const SCM letrec_tail = scm_cons (rvar, scm_cons (init, body)); |
1262 | const SCM letrec_form = scm_cons_source (expr, SCM_IM_LETREC, letrec_tail); | |
1263 | return scm_cons_source (expr, letrec_form, inits); | |
1264 | } | |
1265 | } | |
1266 | ||
1267 | /* (let ((v1 i1) (v2 i2) ...) body) with variables v1 .. vn and initializers | |
1268 | * i1 .. in is transformed to (#@let (vn ... v2 v1) (i1 i2 ...) body). */ | |
302c12b4 | 1269 | SCM |
d6754c23 | 1270 | scm_m_let (SCM expr, SCM env) |
0f2d19dd | 1271 | { |
d6754c23 DH |
1272 | SCM bindings; |
1273 | ||
1274 | const SCM cdr_expr = SCM_CDR (expr); | |
1275 | const long length = scm_ilength (cdr_expr); | |
1276 | ASSERT_SYNTAX (length >= 0, s_bad_expression, expr); | |
1277 | ASSERT_SYNTAX (length >= 2, s_missing_expression, expr); | |
302c12b4 | 1278 | |
d6754c23 DH |
1279 | bindings = SCM_CAR (cdr_expr); |
1280 | if (SCM_SYMBOLP (bindings)) | |
26d5b9b4 | 1281 | { |
d6754c23 DH |
1282 | ASSERT_SYNTAX (length >= 3, s_missing_expression, expr); |
1283 | return memoize_named_let (expr, env); | |
26d5b9b4 | 1284 | } |
d6754c23 DH |
1285 | |
1286 | check_bindings (bindings, expr); | |
1287 | if (SCM_NULLP (bindings) || SCM_NULLP (SCM_CDR (bindings))) | |
26d5b9b4 | 1288 | { |
d6754c23 | 1289 | /* Special case: no bindings or single binding => let* is faster. */ |
34adf7ea | 1290 | const SCM body = scm_m_body (SCM_IM_LET, SCM_CDR (cdr_expr)); |
d6754c23 | 1291 | return scm_m_letstar (scm_cons2 (SCM_CAR (expr), bindings, body), env); |
26d5b9b4 | 1292 | } |
302c12b4 DH |
1293 | else |
1294 | { | |
d6754c23 DH |
1295 | /* plain let */ |
1296 | SCM rvariables; | |
1297 | SCM inits; | |
1298 | transform_bindings (bindings, expr, &rvariables, &inits); | |
26d5b9b4 | 1299 | |
302c12b4 | 1300 | { |
34adf7ea | 1301 | const SCM new_body = scm_m_body (SCM_IM_LET, SCM_CDR (cdr_expr)); |
d6754c23 DH |
1302 | const SCM new_tail = scm_cons2 (rvariables, inits, new_body); |
1303 | SCM_SETCAR (expr, SCM_IM_LET); | |
1304 | SCM_SETCDR (expr, new_tail); | |
1305 | return expr; | |
302c12b4 DH |
1306 | } |
1307 | } | |
0f2d19dd JB |
1308 | } |
1309 | ||
1310 | ||
3b88ed2a | 1311 | SCM_SYNTAX (s_letstar, "let*", scm_i_makbimacro, scm_m_letstar); |
9fbee57e | 1312 | SCM_GLOBAL_SYMBOL (scm_sym_letstar, s_letstar); |
1cc91f1b | 1313 | |
d6754c23 DH |
1314 | /* (let* ((v1 i1) (v2 i2) ...) body) with variables v1 .. vn and initializers |
1315 | * i1 .. in is transformed into the form (#@let* (v1 i1 v2 i2 ...) body). */ | |
9fbee57e | 1316 | SCM |
d6754c23 | 1317 | scm_m_letstar (SCM expr, SCM env SCM_UNUSED) |
0f2d19dd | 1318 | { |
d6754c23 DH |
1319 | SCM binding_idx; |
1320 | SCM new_bindings = SCM_EOL; | |
1321 | SCM new_body; | |
0f2d19dd | 1322 | |
d6754c23 DH |
1323 | const SCM cdr_expr = SCM_CDR (expr); |
1324 | ASSERT_SYNTAX (scm_ilength (cdr_expr) >= 0, s_bad_expression, expr); | |
1325 | ASSERT_SYNTAX (scm_ilength (cdr_expr) >= 2, s_missing_expression, expr); | |
9fbee57e | 1326 | |
d6754c23 DH |
1327 | binding_idx = SCM_CAR (cdr_expr); |
1328 | check_bindings (binding_idx, expr); | |
1329 | ||
1330 | for (; !SCM_NULLP (binding_idx); binding_idx = SCM_CDR (binding_idx)) | |
9fbee57e | 1331 | { |
d6754c23 DH |
1332 | const SCM binding = SCM_CAR (binding_idx); |
1333 | const SCM name = SCM_CAR (binding); | |
1334 | const SCM init = SCM_CADR (binding); | |
1335 | new_bindings = scm_cons2 (init, name, new_bindings); | |
9fbee57e | 1336 | } |
d6754c23 | 1337 | new_bindings = scm_reverse_x (new_bindings, SCM_UNDEFINED); |
9fbee57e | 1338 | |
34adf7ea | 1339 | new_body = scm_m_body (SCM_IM_LETSTAR, SCM_CDR (cdr_expr)); |
d6754c23 | 1340 | return scm_cons2 (SCM_IM_LETSTAR, new_bindings, new_body); |
9fbee57e | 1341 | } |
b8229a3b | 1342 | |
0f2d19dd | 1343 | |
3b88ed2a | 1344 | SCM_SYNTAX(s_letrec, "letrec", scm_i_makbimacro, scm_m_letrec); |
9fbee57e | 1345 | SCM_GLOBAL_SYMBOL(scm_sym_letrec, s_letrec); |
1cc91f1b | 1346 | |
0f2d19dd | 1347 | SCM |
d6754c23 | 1348 | scm_m_letrec (SCM expr, SCM env) |
0f2d19dd | 1349 | { |
d6754c23 DH |
1350 | SCM bindings; |
1351 | ||
1352 | const SCM cdr_expr = SCM_CDR (expr); | |
1353 | ASSERT_SYNTAX (scm_ilength (cdr_expr) >= 0, s_bad_expression, expr); | |
1354 | ASSERT_SYNTAX (scm_ilength (cdr_expr) >= 2, s_missing_expression, expr); | |
1355 | ||
1356 | bindings = SCM_CAR (cdr_expr); | |
1357 | if (SCM_NULLP (bindings)) | |
9fbee57e | 1358 | { |
d6754c23 | 1359 | /* no bindings, let* is executed faster */ |
34adf7ea | 1360 | SCM body = scm_m_body (SCM_IM_LETREC, SCM_CDR (cdr_expr)); |
d6754c23 | 1361 | return scm_m_letstar (scm_cons2 (SCM_CAR (expr), SCM_EOL, body), env); |
9fbee57e DH |
1362 | } |
1363 | else | |
1364 | { | |
d6754c23 DH |
1365 | SCM rvariables; |
1366 | SCM inits; | |
1367 | SCM new_body; | |
1368 | ||
1369 | check_bindings (bindings, expr); | |
1370 | transform_bindings (bindings, expr, &rvariables, &inits); | |
34adf7ea | 1371 | new_body = scm_m_body (SCM_IM_LETREC, SCM_CDR (cdr_expr)); |
d6754c23 | 1372 | return scm_cons2 (SCM_IM_LETREC, rvariables, scm_cons (inits, new_body)); |
9fbee57e | 1373 | } |
0f2d19dd JB |
1374 | } |
1375 | ||
73b64342 | 1376 | |
3b88ed2a | 1377 | SCM_SYNTAX (s_or, "or", scm_i_makbimacro, scm_m_or); |
9fbee57e | 1378 | SCM_GLOBAL_SYMBOL (scm_sym_or, s_or); |
73b64342 MD |
1379 | |
1380 | SCM | |
21628685 | 1381 | scm_m_or (SCM expr, SCM env SCM_UNUSED) |
73b64342 | 1382 | { |
21628685 DH |
1383 | const SCM cdr_expr = SCM_CDR (expr); |
1384 | const long length = scm_ilength (cdr_expr); | |
1385 | ||
1386 | ASSERT_SYNTAX (length >= 0, s_bad_expression, expr); | |
1387 | ||
1388 | if (length == 0) | |
1389 | { | |
1390 | /* Special case: (or) is replaced by #f. */ | |
1391 | return SCM_BOOL_F; | |
1392 | } | |
9fbee57e | 1393 | else |
21628685 DH |
1394 | { |
1395 | SCM_SETCAR (expr, SCM_IM_OR); | |
1396 | return expr; | |
1397 | } | |
73b64342 MD |
1398 | } |
1399 | ||
73b64342 | 1400 | |
9fbee57e DH |
1401 | SCM_SYNTAX (s_quasiquote, "quasiquote", scm_makacro, scm_m_quasiquote); |
1402 | SCM_GLOBAL_SYMBOL (scm_sym_quasiquote, s_quasiquote); | |
1403 | ||
1404 | /* Internal function to handle a quasiquotation: 'form' is the parameter in | |
1405 | * the call (quasiquotation form), 'env' is the environment where unquoted | |
1406 | * expressions will be evaluated, and 'depth' is the current quasiquotation | |
1407 | * nesting level and is known to be greater than zero. */ | |
1408 | static SCM | |
1409 | iqq (SCM form, SCM env, unsigned long int depth) | |
73b64342 | 1410 | { |
9fbee57e | 1411 | if (SCM_CONSP (form)) |
c96d76b8 | 1412 | { |
21628685 | 1413 | const SCM tmp = SCM_CAR (form); |
9fbee57e DH |
1414 | if (SCM_EQ_P (tmp, scm_sym_quasiquote)) |
1415 | { | |
21628685 DH |
1416 | const SCM args = SCM_CDR (form); |
1417 | ASSERT_SYNTAX (scm_ilength (args) == 1, s_expression, form); | |
9fbee57e DH |
1418 | return scm_list_2 (tmp, iqq (SCM_CAR (args), env, depth + 1)); |
1419 | } | |
1420 | else if (SCM_EQ_P (tmp, scm_sym_unquote)) | |
1421 | { | |
21628685 DH |
1422 | const SCM args = SCM_CDR (form); |
1423 | ASSERT_SYNTAX (scm_ilength (args) == 1, s_expression, form); | |
9fbee57e DH |
1424 | if (depth - 1 == 0) |
1425 | return scm_eval_car (args, env); | |
1426 | else | |
1427 | return scm_list_2 (tmp, iqq (SCM_CAR (args), env, depth - 1)); | |
1428 | } | |
1429 | else if (SCM_CONSP (tmp) | |
1430 | && SCM_EQ_P (SCM_CAR (tmp), scm_sym_uq_splicing)) | |
1431 | { | |
21628685 DH |
1432 | const SCM args = SCM_CDR (tmp); |
1433 | ASSERT_SYNTAX (scm_ilength (args) == 1, s_expression, form); | |
9fbee57e DH |
1434 | if (depth - 1 == 0) |
1435 | { | |
21628685 DH |
1436 | const SCM list = scm_eval_car (args, env); |
1437 | const SCM rest = SCM_CDR (form); | |
1438 | ASSERT_SYNTAX_2 (scm_ilength (list) >= 0, | |
1439 | s_splicing, list, form); | |
9fbee57e DH |
1440 | return scm_append (scm_list_2 (list, iqq (rest, env, depth))); |
1441 | } | |
1442 | else | |
1443 | return scm_cons (iqq (SCM_CAR (form), env, depth - 1), | |
1444 | iqq (SCM_CDR (form), env, depth)); | |
1445 | } | |
1446 | else | |
1447 | return scm_cons (iqq (SCM_CAR (form), env, depth), | |
1448 | iqq (SCM_CDR (form), env, depth)); | |
1449 | } | |
1450 | else if (SCM_VECTORP (form)) | |
c96d76b8 | 1451 | { |
9fbee57e DH |
1452 | size_t i = SCM_VECTOR_LENGTH (form); |
1453 | SCM const *const data = SCM_VELTS (form); | |
1454 | SCM tmp = SCM_EOL; | |
1455 | while (i != 0) | |
1456 | tmp = scm_cons (data[--i], tmp); | |
1457 | scm_remember_upto_here_1 (form); | |
1458 | return scm_vector (iqq (tmp, env, depth)); | |
c96d76b8 | 1459 | } |
9fbee57e DH |
1460 | else |
1461 | return form; | |
1462 | } | |
1463 | ||
1464 | SCM | |
21628685 | 1465 | scm_m_quasiquote (SCM expr, SCM env) |
9fbee57e | 1466 | { |
21628685 DH |
1467 | const SCM cdr_expr = SCM_CDR (expr); |
1468 | ASSERT_SYNTAX (scm_ilength (cdr_expr) >= 0, s_bad_expression, expr); | |
1469 | ASSERT_SYNTAX (scm_ilength (cdr_expr) == 1, s_expression, expr); | |
1470 | return iqq (SCM_CAR (cdr_expr), env, 1); | |
9fbee57e DH |
1471 | } |
1472 | ||
1473 | ||
3b88ed2a | 1474 | SCM_SYNTAX (s_quote, "quote", scm_i_makbimacro, scm_m_quote); |
9fbee57e DH |
1475 | SCM_GLOBAL_SYMBOL (scm_sym_quote, s_quote); |
1476 | ||
1477 | SCM | |
21628685 | 1478 | scm_m_quote (SCM expr, SCM env SCM_UNUSED) |
9fbee57e | 1479 | { |
21628685 DH |
1480 | SCM quotee; |
1481 | ||
1482 | const SCM cdr_expr = SCM_CDR (expr); | |
1483 | ASSERT_SYNTAX (scm_ilength (cdr_expr) >= 0, s_bad_expression, expr); | |
1484 | ASSERT_SYNTAX (scm_ilength (cdr_expr) == 1, s_expression, expr); | |
1485 | quotee = SCM_CAR (cdr_expr); | |
1486 | if (SCM_IMP (quotee) && !SCM_NULLP (quotee)) | |
1487 | return quotee; | |
1488 | else if (SCM_VECTORP (quotee)) | |
1489 | return quotee; | |
1490 | #if 0 | |
1491 | /* The following optimization would be possible if all variable references | |
1492 | * were resolved during memoization: */ | |
1493 | else if (SCM_SYMBOLP (quotee)) | |
1494 | return quotee; | |
1495 | #endif | |
1496 | SCM_SETCAR (expr, SCM_IM_QUOTE); | |
1497 | return expr; | |
9fbee57e DH |
1498 | } |
1499 | ||
1500 | ||
1501 | /* Will go into the RnRS module when Guile is factorized. | |
3b88ed2a | 1502 | SCM_SYNTAX (s_set_x, "set!", scm_i_makbimacro, scm_m_set_x); */ |
9fbee57e DH |
1503 | static const char s_set_x[] = "set!"; |
1504 | SCM_GLOBAL_SYMBOL (scm_sym_set_x, s_set_x); | |
1505 | ||
1506 | SCM | |
82b3e2c6 | 1507 | scm_m_set_x (SCM expr, SCM env SCM_UNUSED) |
9fbee57e | 1508 | { |
82b3e2c6 DH |
1509 | SCM variable; |
1510 | ||
1511 | const SCM cdr_expr = SCM_CDR (expr); | |
1512 | ASSERT_SYNTAX (scm_ilength (cdr_expr) >= 0, s_bad_expression, expr); | |
1513 | ASSERT_SYNTAX (scm_ilength (cdr_expr) == 2, s_expression, expr); | |
1514 | variable = SCM_CAR (cdr_expr); | |
1515 | ASSERT_SYNTAX_2 (SCM_SYMBOLP (variable), s_bad_variable, variable, expr); | |
1516 | ||
1517 | SCM_SETCAR (expr, SCM_IM_SET_X); | |
1518 | return expr; | |
9fbee57e DH |
1519 | } |
1520 | ||
1521 | ||
1522 | /* Start of the memoizers for non-R5RS builtin macros. */ | |
1523 | ||
1524 | ||
3b88ed2a | 1525 | SCM_SYNTAX (s_atapply, "@apply", scm_i_makbimacro, scm_m_apply); |
9fbee57e DH |
1526 | SCM_GLOBAL_SYMBOL (scm_sym_atapply, s_atapply); |
1527 | SCM_GLOBAL_SYMBOL (scm_sym_apply, s_atapply + 1); | |
1528 | ||
1529 | SCM | |
82b3e2c6 | 1530 | scm_m_apply (SCM expr, SCM env SCM_UNUSED) |
9fbee57e | 1531 | { |
82b3e2c6 DH |
1532 | const SCM cdr_expr = SCM_CDR (expr); |
1533 | ASSERT_SYNTAX (scm_ilength (cdr_expr) >= 0, s_bad_expression, expr); | |
1534 | ASSERT_SYNTAX (scm_ilength (cdr_expr) == 2, s_missing_expression, expr); | |
2e171178 | 1535 | |
82b3e2c6 DH |
1536 | SCM_SETCAR (expr, SCM_IM_APPLY); |
1537 | return expr; | |
1538 | } | |
2e171178 | 1539 | |
2e171178 | 1540 | |
3b88ed2a | 1541 | SCM_SYNTAX (s_atbind, "@bind", scm_i_makbimacro, scm_m_atbind); |
73b64342 | 1542 | |
82b3e2c6 DH |
1543 | /* FIXME: The following explanation should go into the documentation: */ |
1544 | /* (@bind ((var init) ...) body ...) will assign the values of the `init's to | |
1545 | * the global variables named by `var's (symbols, not evaluated), creating | |
1546 | * them if they don't exist, executes body, and then restores the previous | |
1547 | * values of the `var's. Additionally, whenever control leaves body, the | |
1548 | * values of the `var's are saved and restored when control returns. It is an | |
1549 | * error when a symbol appears more than once among the `var's. All `init's | |
1550 | * are evaluated before any `var' is set. | |
1551 | * | |
1552 | * Think of this as `let' for dynamic scope. | |
1553 | */ | |
1554 | ||
1555 | /* (@bind ((var1 exp1) ... (varn expn)) body ...) is memoized into | |
1556 | * (#@bind ((varn ... var1) . (exp1 ... expn)) body ...). | |
1557 | * | |
1558 | * FIXME - also implement `@bind*'. | |
1559 | */ | |
73b64342 | 1560 | SCM |
82b3e2c6 | 1561 | scm_m_atbind (SCM expr, SCM env) |
73b64342 | 1562 | { |
82b3e2c6 DH |
1563 | SCM bindings; |
1564 | SCM rvariables; | |
1565 | SCM inits; | |
1566 | SCM variable_idx; | |
2e171178 | 1567 | |
82b3e2c6 | 1568 | const SCM top_level = scm_env_top_level (env); |
73b64342 | 1569 | |
82b3e2c6 DH |
1570 | const SCM cdr_expr = SCM_CDR (expr); |
1571 | ASSERT_SYNTAX (scm_ilength (cdr_expr) >= 0, s_bad_expression, expr); | |
1572 | ASSERT_SYNTAX (scm_ilength (cdr_expr) >= 2, s_missing_expression, expr); | |
1573 | bindings = SCM_CAR (cdr_expr); | |
1574 | check_bindings (bindings, expr); | |
1575 | transform_bindings (bindings, expr, &rvariables, &inits); | |
1576 | ||
1577 | for (variable_idx = rvariables; | |
1578 | !SCM_NULLP (variable_idx); | |
1579 | variable_idx = SCM_CDR (variable_idx)) | |
73b64342 | 1580 | { |
82b3e2c6 DH |
1581 | /* The first call to scm_sym2var will look beyond the current module, |
1582 | * while the second call wont. */ | |
1583 | const SCM variable = SCM_CAR (variable_idx); | |
1584 | SCM new_variable = scm_sym2var (variable, top_level, SCM_BOOL_F); | |
1585 | if (SCM_FALSEP (new_variable)) | |
1586 | new_variable = scm_sym2var (variable, top_level, SCM_BOOL_T); | |
1587 | SCM_SETCAR (variable_idx, new_variable); | |
73b64342 | 1588 | } |
82b3e2c6 DH |
1589 | |
1590 | SCM_SETCAR (expr, SCM_IM_BIND); | |
1591 | SCM_SETCAR (cdr_expr, scm_cons (rvariables, inits)); | |
1592 | return expr; | |
73b64342 | 1593 | } |
73b64342 | 1594 | |
b0c5d67b | 1595 | |
3b88ed2a | 1596 | SCM_SYNTAX(s_atcall_cc, "@call-with-current-continuation", scm_i_makbimacro, scm_m_cont); |
9fbee57e DH |
1597 | SCM_GLOBAL_SYMBOL(scm_sym_atcall_cc, s_atcall_cc); |
1598 | ||
9fbee57e | 1599 | SCM |
da48db62 | 1600 | scm_m_cont (SCM expr, SCM env SCM_UNUSED) |
b0c5d67b | 1601 | { |
da48db62 DH |
1602 | const SCM cdr_expr = SCM_CDR (expr); |
1603 | ASSERT_SYNTAX (scm_ilength (cdr_expr) >= 0, s_bad_expression, expr); | |
1604 | ASSERT_SYNTAX (scm_ilength (cdr_expr) == 1, s_expression, expr); | |
1605 | ||
1606 | SCM_SETCAR (expr, SCM_IM_CONT); | |
1607 | return expr; | |
b0c5d67b | 1608 | } |
b0c5d67b DH |
1609 | |
1610 | ||
3b88ed2a | 1611 | SCM_SYNTAX (s_at_call_with_values, "@call-with-values", scm_i_makbimacro, scm_m_at_call_with_values); |
9fbee57e | 1612 | SCM_GLOBAL_SYMBOL(scm_sym_at_call_with_values, s_at_call_with_values); |
b0c5d67b DH |
1613 | |
1614 | SCM | |
da48db62 | 1615 | scm_m_at_call_with_values (SCM expr, SCM env SCM_UNUSED) |
b0c5d67b | 1616 | { |
da48db62 DH |
1617 | const SCM cdr_expr = SCM_CDR (expr); |
1618 | ASSERT_SYNTAX (scm_ilength (cdr_expr) >= 0, s_bad_expression, expr); | |
1619 | ASSERT_SYNTAX (scm_ilength (cdr_expr) == 2, s_expression, expr); | |
1620 | ||
1621 | SCM_SETCAR (expr, SCM_IM_CALL_WITH_VALUES); | |
1622 | return expr; | |
b0c5d67b | 1623 | } |
b0c5d67b DH |
1624 | |
1625 | ||
3b88ed2a | 1626 | SCM_SYNTAX (s_future, "future", scm_i_makbimacro, scm_m_future); |
9fbee57e | 1627 | SCM_GLOBAL_SYMBOL (scm_sym_future, s_future); |
a513ead3 | 1628 | |
9fbee57e DH |
1629 | /* Like promises, futures are implemented as closures with an empty |
1630 | * parameter list. Thus, (future <expression>) is transformed into | |
1631 | * (#@future '() <expression>), where the empty list represents the | |
1632 | * empty parameter list. This representation allows for easy creation | |
1633 | * of the closure during evaluation. */ | |
a513ead3 | 1634 | SCM |
8ae95199 | 1635 | scm_m_future (SCM expr, SCM env) |
a513ead3 | 1636 | { |
8ae95199 DH |
1637 | const SCM new_expr = memoize_as_thunk_prototype (expr, env); |
1638 | SCM_SETCAR (new_expr, SCM_IM_FUTURE); | |
1639 | return new_expr; | |
a513ead3 MV |
1640 | } |
1641 | ||
9fbee57e | 1642 | |
3b88ed2a | 1643 | SCM_SYNTAX (s_gset_x, "set!", scm_i_makbimacro, scm_m_generalized_set_x); |
9fbee57e DH |
1644 | SCM_SYMBOL (scm_sym_setter, "setter"); |
1645 | ||
1646 | SCM | |
da48db62 | 1647 | scm_m_generalized_set_x (SCM expr, SCM env SCM_UNUSED) |
9fbee57e | 1648 | { |
da48db62 DH |
1649 | SCM target; |
1650 | ||
1651 | const SCM cdr_expr = SCM_CDR (expr); | |
1652 | ASSERT_SYNTAX (scm_ilength (cdr_expr) >= 0, s_bad_expression, expr); | |
1653 | ASSERT_SYNTAX (scm_ilength (cdr_expr) == 2, s_expression, expr); | |
1654 | ||
1655 | target = SCM_CAR (cdr_expr); | |
1656 | if (!SCM_CONSP (target)) | |
1657 | { | |
1658 | /* R5RS usage */ | |
1659 | return scm_m_set_x (expr, env); | |
1660 | } | |
9fbee57e | 1661 | else |
da48db62 DH |
1662 | { |
1663 | /* (set! (foo bar ...) baz) becomes ((setter foo) bar ... baz) */ | |
1664 | ||
1665 | const SCM setter_proc_tail = scm_list_1 (SCM_CAR (target)); | |
1666 | const SCM setter_proc = scm_cons_source (expr, scm_sym_setter, setter_proc_tail); | |
1667 | ||
1668 | const SCM cddr_expr = SCM_CDR (cdr_expr); | |
1669 | const SCM setter_args = scm_append_x (scm_list_2 (SCM_CDR (target), cddr_expr)); | |
1670 | ||
1671 | SCM_SETCAR (expr, setter_proc); | |
1672 | SCM_SETCDR (expr, setter_args); | |
1673 | return expr; | |
1674 | } | |
9fbee57e DH |
1675 | } |
1676 | ||
1677 | ||
a4aa2134 DH |
1678 | /* @slot-ref is bound privately in the (oop goops) module from goops.c. As |
1679 | * soon as the module system allows us to more freely create bindings in | |
1680 | * arbitrary modules during the startup phase, the code from goops.c should be | |
1681 | * moved here. */ | |
9fbee57e | 1682 | SCM |
9a848baf | 1683 | scm_m_atslot_ref (SCM expr, SCM env SCM_UNUSED) |
9fbee57e | 1684 | { |
9a848baf DH |
1685 | SCM slot_nr; |
1686 | ||
1687 | const SCM cdr_expr = SCM_CDR (expr); | |
1688 | ASSERT_SYNTAX (scm_ilength (cdr_expr) >= 0, s_bad_expression, expr); | |
1689 | ASSERT_SYNTAX (scm_ilength (cdr_expr) == 2, s_expression, expr); | |
1690 | slot_nr = SCM_CADR (cdr_expr); | |
1691 | ASSERT_SYNTAX_2 (SCM_INUMP (slot_nr), s_bad_slot_number, slot_nr, expr); | |
9fbee57e | 1692 | |
9a848baf DH |
1693 | SCM_SETCAR (expr, SCM_IM_SLOT_REF); |
1694 | return expr; | |
1695 | } | |
9fbee57e | 1696 | |
9fbee57e | 1697 | |
a4aa2134 DH |
1698 | /* @slot-set! is bound privately in the (oop goops) module from goops.c. As |
1699 | * soon as the module system allows us to more freely create bindings in | |
1700 | * arbitrary modules during the startup phase, the code from goops.c should be | |
1701 | * moved here. */ | |
9fbee57e | 1702 | SCM |
9a848baf | 1703 | scm_m_atslot_set_x (SCM expr, SCM env SCM_UNUSED) |
9fbee57e | 1704 | { |
9a848baf DH |
1705 | SCM slot_nr; |
1706 | ||
1707 | const SCM cdr_expr = SCM_CDR (expr); | |
1708 | ASSERT_SYNTAX (scm_ilength (cdr_expr) >= 0, s_bad_expression, expr); | |
1709 | ASSERT_SYNTAX (scm_ilength (cdr_expr) == 3, s_expression, expr); | |
1710 | slot_nr = SCM_CADR (cdr_expr); | |
1711 | ASSERT_SYNTAX_2 (SCM_INUMP (slot_nr), s_bad_slot_number, slot_nr, expr); | |
1712 | ||
1713 | SCM_SETCAR (expr, SCM_IM_SLOT_SET_X); | |
1714 | return expr; | |
9fbee57e | 1715 | } |
9fbee57e DH |
1716 | |
1717 | ||
1718 | #if SCM_ENABLE_ELISP | |
1719 | ||
70c1c108 DH |
1720 | static const char s_defun[] = "Symbol's function definition is void"; |
1721 | ||
3b88ed2a | 1722 | SCM_SYNTAX (s_nil_cond, "nil-cond", scm_i_makbimacro, scm_m_nil_cond); |
9fbee57e | 1723 | |
70c1c108 DH |
1724 | /* nil-cond expressions have the form |
1725 | * (nil-cond COND VAL COND VAL ... ELSEVAL) */ | |
9fbee57e | 1726 | SCM |
70c1c108 | 1727 | scm_m_nil_cond (SCM expr, SCM env SCM_UNUSED) |
9fbee57e | 1728 | { |
70c1c108 DH |
1729 | const long length = scm_ilength (SCM_CDR (expr)); |
1730 | ASSERT_SYNTAX (length >= 0, s_bad_expression, expr); | |
1731 | ASSERT_SYNTAX (length >= 1 && (length % 2) == 1, s_expression, expr); | |
1732 | ||
1733 | SCM_SETCAR (expr, SCM_IM_NIL_COND); | |
1734 | return expr; | |
9fbee57e DH |
1735 | } |
1736 | ||
1737 | ||
3b88ed2a | 1738 | SCM_SYNTAX (s_atfop, "@fop", scm_i_makbimacro, scm_m_atfop); |
9fbee57e | 1739 | |
70c1c108 DH |
1740 | /* The @fop-macro handles procedure and macro applications for elisp. The |
1741 | * input expression must have the form | |
1742 | * (@fop <var> (transformer-macro <expr> ...)) | |
1743 | * where <var> must be a symbol. The expression is transformed into the | |
1744 | * memoized form of either | |
1745 | * (apply <un-aliased var> (transformer-macro <expr> ...)) | |
1746 | * if the value of var (across all aliasing) is not a macro, or | |
1747 | * (<un-aliased var> <expr> ...) | |
1748 | * if var is a macro. */ | |
9fbee57e | 1749 | SCM |
70c1c108 | 1750 | scm_m_atfop (SCM expr, SCM env SCM_UNUSED) |
9fbee57e | 1751 | { |
70c1c108 DH |
1752 | SCM location; |
1753 | SCM symbol; | |
1754 | ||
1755 | const SCM cdr_expr = SCM_CDR (expr); | |
1756 | ASSERT_SYNTAX (scm_ilength (cdr_expr) >= 0, s_bad_expression, expr); | |
1757 | ASSERT_SYNTAX (scm_ilength (cdr_expr) >= 1, s_missing_expression, expr); | |
1758 | ||
1759 | symbol = SCM_CAR (cdr_expr); | |
1760 | ASSERT_SYNTAX_2 (SCM_SYMBOLP (symbol), s_bad_variable, symbol, expr); | |
1761 | ||
1762 | location = scm_symbol_fref (symbol); | |
1763 | ASSERT_SYNTAX_2 (SCM_VARIABLEP (location), s_defun, symbol, expr); | |
1764 | ||
1765 | /* The elisp function `defalias' allows to define aliases for symbols. To | |
1766 | * look up such definitions, the chain of symbol definitions has to be | |
1767 | * followed up to the terminal symbol. */ | |
1768 | while (SCM_SYMBOLP (SCM_VARIABLE_REF (location))) | |
9fbee57e | 1769 | { |
70c1c108 DH |
1770 | const SCM alias = SCM_VARIABLE_REF (location); |
1771 | location = scm_symbol_fref (alias); | |
1772 | ASSERT_SYNTAX_2 (SCM_VARIABLEP (location), s_defun, symbol, expr); | |
9fbee57e | 1773 | } |
70c1c108 DH |
1774 | |
1775 | /* Memoize the value location belonging to the terminal symbol. */ | |
1776 | SCM_SETCAR (cdr_expr, location); | |
1777 | ||
1778 | if (!SCM_MACROP (SCM_VARIABLE_REF (location))) | |
9fbee57e | 1779 | { |
70c1c108 DH |
1780 | /* Since the location does not contain a macro, the form is a procedure |
1781 | * application. Replace `@fop' by `@apply' and transform the expression | |
1782 | * including the `transformer-macro'. */ | |
1783 | SCM_SETCAR (expr, SCM_IM_APPLY); | |
1784 | return expr; | |
1785 | } | |
1786 | else | |
1787 | { | |
1788 | /* Since the location contains a macro, the arguments should not be | |
1789 | * transformed, so the `transformer-macro' is cut out. The resulting | |
1790 | * expression starts with the memoized variable, that is at the cdr of | |
1791 | * the input expression. */ | |
1792 | SCM_SETCDR (cdr_expr, SCM_CDADR (cdr_expr)); | |
1793 | return cdr_expr; | |
9fbee57e | 1794 | } |
9fbee57e DH |
1795 | } |
1796 | ||
1797 | #endif /* SCM_ENABLE_ELISP */ | |
1798 | ||
1799 | ||
f58c472a DH |
1800 | /* Start of the memoizers for deprecated macros. */ |
1801 | ||
1802 | ||
1803 | #if (SCM_ENABLE_DEPRECATED == 1) | |
1804 | ||
1805 | SCM_SYNTAX (s_undefine, "undefine", scm_makacro, scm_m_undefine); | |
1806 | ||
1807 | SCM | |
70c1c108 | 1808 | scm_m_undefine (SCM expr, SCM env) |
f58c472a | 1809 | { |
70c1c108 DH |
1810 | SCM variable; |
1811 | SCM location; | |
1812 | ||
1813 | const SCM cdr_expr = SCM_CDR (expr); | |
1814 | ASSERT_SYNTAX (SCM_TOP_LEVEL (env), "Bad undefine placement in", expr); | |
1815 | ASSERT_SYNTAX (scm_ilength (cdr_expr) >= 0, s_bad_expression, expr); | |
1816 | ASSERT_SYNTAX (scm_ilength (cdr_expr) == 1, s_expression, expr); | |
1817 | ||
1818 | variable = SCM_CAR (cdr_expr); | |
1819 | ASSERT_SYNTAX_2 (SCM_SYMBOLP (variable), s_bad_variable, variable, expr); | |
1820 | location = scm_sym2var (variable, scm_env_top_level (env), SCM_BOOL_F); | |
1821 | ASSERT_SYNTAX_2 (!SCM_FALSEP (location) | |
1822 | && !SCM_UNBNDP (SCM_VARIABLE_REF (location)), | |
1823 | "variable already unbound ", variable, expr); | |
1824 | SCM_VARIABLE_SET (location, SCM_UNDEFINED); | |
f58c472a | 1825 | return SCM_UNSPECIFIED; |
f58c472a DH |
1826 | } |
1827 | ||
1828 | #endif | |
1829 | ||
1830 | ||
328dc9a3 DH |
1831 | static SCM |
1832 | m_expand_body (const SCM xorig, const SCM env) | |
26d5b9b4 | 1833 | { |
22a52da1 | 1834 | SCM x = SCM_CDR (xorig), defs = SCM_EOL; |
26d5b9b4 MD |
1835 | |
1836 | while (SCM_NIMP (x)) | |
1837 | { | |
22a52da1 DH |
1838 | SCM form = SCM_CAR (x); |
1839 | if (!SCM_CONSP (form)) | |
26d5b9b4 MD |
1840 | break; |
1841 | if (!SCM_SYMBOLP (SCM_CAR (form))) | |
1842 | break; | |
22a52da1 | 1843 | |
3a3111a8 MD |
1844 | form = scm_macroexp (scm_cons_source (form, |
1845 | SCM_CAR (form), | |
1846 | SCM_CDR (form)), | |
1847 | env); | |
26d5b9b4 | 1848 | |
cf498326 | 1849 | if (SCM_EQ_P (SCM_IM_DEFINE, SCM_CAR (form))) |
26d5b9b4 MD |
1850 | { |
1851 | defs = scm_cons (SCM_CDR (form), defs); | |
22a52da1 | 1852 | x = SCM_CDR (x); |
26d5b9b4 | 1853 | } |
22a52da1 | 1854 | else if (!SCM_IMP (defs)) |
26d5b9b4 MD |
1855 | { |
1856 | break; | |
1857 | } | |
cf498326 | 1858 | else if (SCM_EQ_P (SCM_IM_BEGIN, SCM_CAR (form))) |
26d5b9b4 | 1859 | { |
8ea46249 | 1860 | x = scm_append (scm_list_2 (SCM_CDR (form), SCM_CDR (x))); |
26d5b9b4 MD |
1861 | } |
1862 | else | |
1863 | { | |
22a52da1 | 1864 | x = scm_cons (form, SCM_CDR (x)); |
26d5b9b4 MD |
1865 | break; |
1866 | } | |
1867 | } | |
1868 | ||
ced8edb0 DH |
1869 | /* FIXME: xorig is already partially memoized and does not hold information |
1870 | * about the file location. */ | |
1871 | ASSERT_SYNTAX (SCM_CONSP (x), s_missing_body_expression, xorig); | |
1872 | ||
302c12b4 | 1873 | if (!SCM_NULLP (defs)) |
26d5b9b4 | 1874 | { |
302c12b4 | 1875 | SCM rvars, inits, body, letrec; |
d6754c23 DH |
1876 | check_bindings (defs, xorig); |
1877 | transform_bindings (defs, xorig, &rvars, &inits); | |
34adf7ea | 1878 | body = scm_m_body (SCM_IM_DEFINE, x); |
302c12b4 DH |
1879 | letrec = scm_cons2 (SCM_IM_LETREC, rvars, scm_cons (inits, body)); |
1880 | SCM_SETCAR (xorig, letrec); | |
1881 | SCM_SETCDR (xorig, SCM_EOL); | |
1882 | } | |
1883 | else | |
1884 | { | |
302c12b4 DH |
1885 | SCM_SETCAR (xorig, SCM_CAR (x)); |
1886 | SCM_SETCDR (xorig, SCM_CDR (x)); | |
26d5b9b4 | 1887 | } |
26d5b9b4 MD |
1888 | |
1889 | return xorig; | |
1890 | } | |
1891 | ||
328dc9a3 DH |
1892 | #if (SCM_ENABLE_DEPRECATED == 1) |
1893 | ||
1894 | /* Deprecated in guile 1.7.0 on 2003-11-09. */ | |
1895 | SCM | |
1896 | scm_m_expand_body (SCM exprs, SCM env) | |
1897 | { | |
1898 | scm_c_issue_deprecation_warning | |
1899 | ("`scm_m_expand_body' is deprecated."); | |
1900 | return m_expand_body (exprs, env); | |
1901 | } | |
1902 | ||
1903 | #endif | |
1904 | ||
89bff2fc | 1905 | |
26d5b9b4 MD |
1906 | SCM |
1907 | scm_macroexp (SCM x, SCM env) | |
1908 | { | |
86d31dfe | 1909 | SCM res, proc, orig_sym; |
26d5b9b4 MD |
1910 | |
1911 | /* Don't bother to produce error messages here. We get them when we | |
1912 | eventually execute the code for real. */ | |
1913 | ||
1914 | macro_tail: | |
86d31dfe MV |
1915 | orig_sym = SCM_CAR (x); |
1916 | if (!SCM_SYMBOLP (orig_sym)) | |
26d5b9b4 MD |
1917 | return x; |
1918 | ||
26d5b9b4 MD |
1919 | { |
1920 | SCM *proc_ptr = scm_lookupcar1 (x, env, 0); | |
1921 | if (proc_ptr == NULL) | |
1922 | { | |
1923 | /* We have lost the race. */ | |
1924 | goto macro_tail; | |
1925 | } | |
1926 | proc = *proc_ptr; | |
1927 | } | |
26d5b9b4 MD |
1928 | |
1929 | /* Only handle memoizing macros. `Acros' and `macros' are really | |
1930 | special forms and should not be evaluated here. */ | |
1931 | ||
3b88ed2a DH |
1932 | if (!SCM_MACROP (proc) |
1933 | || (SCM_MACRO_TYPE (proc) != 2 && !SCM_BUILTIN_MACRO_P (proc))) | |
26d5b9b4 MD |
1934 | return x; |
1935 | ||
86d31dfe | 1936 | SCM_SETCAR (x, orig_sym); /* Undo memoizing effect of lookupcar */ |
fdc28395 | 1937 | res = scm_call_2 (SCM_MACRO_CODE (proc), x, env); |
26d5b9b4 MD |
1938 | |
1939 | if (scm_ilength (res) <= 0) | |
8ea46249 | 1940 | res = scm_list_2 (SCM_IM_BEGIN, res); |
26d5b9b4 | 1941 | |
26d5b9b4 MD |
1942 | SCM_DEFER_INTS; |
1943 | SCM_SETCAR (x, SCM_CAR (res)); | |
1944 | SCM_SETCDR (x, SCM_CDR (res)); | |
1945 | SCM_ALLOW_INTS; | |
1946 | ||
1947 | goto macro_tail; | |
1948 | } | |
73b64342 | 1949 | |
a44a9715 DH |
1950 | #define SCM_BIT7(x) (127 & SCM_UNPACK (x)) |
1951 | ||
1952 | /* A function object to implement "apply" for non-closure functions. */ | |
1953 | static SCM f_apply; | |
1954 | /* An endless list consisting of #<undefined> objects: */ | |
1955 | static SCM undefineds; | |
1956 | ||
60a49842 | 1957 | |
6dbd0af5 MD |
1958 | /* scm_unmemocopy takes a memoized expression together with its |
1959 | * environment and rewrites it to its original form. Thus, it is the | |
1960 | * inversion of the rewrite rules above. The procedure is not | |
1961 | * optimized for speed. It's used in scm_iprin1 when printing the | |
220ff1eb MD |
1962 | * code of a closure, in scm_procedure_source, in display_frame when |
1963 | * generating the source for a stackframe in a backtrace, and in | |
1964 | * display_expression. | |
86d31dfe | 1965 | * |
c96d76b8 | 1966 | * Unmemoizing is not a reliable process. You cannot in general |
86d31dfe MV |
1967 | * expect to get the original source back. |
1968 | * | |
1969 | * However, GOOPS currently relies on this for method compilation. | |
1970 | * This ought to change. | |
26d5b9b4 MD |
1971 | */ |
1972 | ||
8ea46249 | 1973 | static SCM |
60a49842 | 1974 | build_binding_list (SCM rnames, SCM rinits) |
8ea46249 DH |
1975 | { |
1976 | SCM bindings = SCM_EOL; | |
60a49842 | 1977 | while (!SCM_NULLP (rnames)) |
8ea46249 | 1978 | { |
60a49842 | 1979 | SCM binding = scm_list_2 (SCM_CAR (rnames), SCM_CAR (rinits)); |
8ea46249 | 1980 | bindings = scm_cons (binding, bindings); |
60a49842 DH |
1981 | rnames = SCM_CDR (rnames); |
1982 | rinits = SCM_CDR (rinits); | |
8ea46249 DH |
1983 | } |
1984 | return bindings; | |
1985 | } | |
1986 | ||
60a49842 DH |
1987 | |
1988 | SCM_SYMBOL (sym_three_question_marks, "???"); | |
1989 | ||
1990 | #define unmemocar scm_unmemocar | |
1991 | ||
1992 | SCM | |
1993 | scm_unmemocar (SCM form, SCM env) | |
1994 | { | |
1995 | if (!SCM_CONSP (form)) | |
1996 | return form; | |
1997 | else | |
1998 | { | |
1999 | SCM c = SCM_CAR (form); | |
2000 | if (SCM_VARIABLEP (c)) | |
2001 | { | |
2002 | SCM sym = scm_module_reverse_lookup (scm_env_module (env), c); | |
2003 | if (SCM_FALSEP (sym)) | |
2004 | sym = sym_three_question_marks; | |
2005 | SCM_SETCAR (form, sym); | |
2006 | } | |
2007 | else if (SCM_ILOCP (c)) | |
2008 | { | |
2009 | unsigned long int ir; | |
2010 | ||
2011 | for (ir = SCM_IFRAME (c); ir != 0; --ir) | |
2012 | env = SCM_CDR (env); | |
2013 | env = SCM_CAAR (env); | |
2014 | for (ir = SCM_IDIST (c); ir != 0; --ir) | |
2015 | env = SCM_CDR (env); | |
2016 | SCM_SETCAR (form, SCM_ICDRP (c) ? env : SCM_CAR (env)); | |
2017 | } | |
2018 | return form; | |
2019 | } | |
2020 | } | |
2021 | ||
6dbd0af5 | 2022 | static SCM |
1bbd0b84 | 2023 | unmemocopy (SCM x, SCM env) |
6dbd0af5 MD |
2024 | { |
2025 | SCM ls, z; | |
6dbd0af5 | 2026 | SCM p; |
21628685 DH |
2027 | |
2028 | if (SCM_VECTORP (x)) | |
2029 | { | |
2030 | return scm_list_2 (scm_sym_quote, x); | |
2031 | } | |
2032 | else if (!SCM_CONSP (x)) | |
6dbd0af5 | 2033 | return x; |
21628685 | 2034 | |
6dbd0af5 | 2035 | p = scm_whash_lookup (scm_source_whash, x); |
8ea46249 | 2036 | switch (SCM_ITAG7 (SCM_CAR (x))) |
6dbd0af5 | 2037 | { |
1b43d24c | 2038 | case SCM_BIT7 (SCM_IM_AND): |
2f0d1375 | 2039 | ls = z = scm_cons (scm_sym_and, SCM_UNSPECIFIED); |
6dbd0af5 | 2040 | break; |
1b43d24c | 2041 | case SCM_BIT7 (SCM_IM_BEGIN): |
2f0d1375 | 2042 | ls = z = scm_cons (scm_sym_begin, SCM_UNSPECIFIED); |
6dbd0af5 | 2043 | break; |
1b43d24c | 2044 | case SCM_BIT7 (SCM_IM_CASE): |
2f0d1375 | 2045 | ls = z = scm_cons (scm_sym_case, SCM_UNSPECIFIED); |
6dbd0af5 | 2046 | break; |
1b43d24c | 2047 | case SCM_BIT7 (SCM_IM_COND): |
2f0d1375 | 2048 | ls = z = scm_cons (scm_sym_cond, SCM_UNSPECIFIED); |
6dbd0af5 | 2049 | break; |
1b43d24c | 2050 | case SCM_BIT7 (SCM_IM_DO): |
6dbd0af5 | 2051 | { |
e681d187 DH |
2052 | /* format: (#@do (i1 ... ik) (nk nk-1 ...) (test) (body) s1 ... sk), |
2053 | * where ix is an initializer for a local variable, nx is the name of | |
8ea46249 DH |
2054 | * the local variable, test is the test clause of the do loop, body is |
2055 | * the body of the do loop and sx are the step clauses for the local | |
2056 | * variables. */ | |
2057 | SCM names, inits, test, memoized_body, steps, bindings; | |
2058 | ||
6dbd0af5 | 2059 | x = SCM_CDR (x); |
8ea46249 | 2060 | inits = scm_reverse (unmemocopy (SCM_CAR (x), env)); |
e681d187 DH |
2061 | x = SCM_CDR (x); |
2062 | names = SCM_CAR (x); | |
821f18a4 | 2063 | env = SCM_EXTEND_ENV (names, SCM_EOL, env); |
6dbd0af5 | 2064 | x = SCM_CDR (x); |
8ea46249 DH |
2065 | test = unmemocopy (SCM_CAR (x), env); |
2066 | x = SCM_CDR (x); | |
2067 | memoized_body = SCM_CAR (x); | |
2068 | x = SCM_CDR (x); | |
2069 | steps = scm_reverse (unmemocopy (x, env)); | |
2070 | ||
26d5b9b4 | 2071 | /* build transformed binding list */ |
8ea46249 DH |
2072 | bindings = SCM_EOL; |
2073 | while (!SCM_NULLP (names)) | |
6dbd0af5 | 2074 | { |
8ea46249 DH |
2075 | SCM name = SCM_CAR (names); |
2076 | SCM init = SCM_CAR (inits); | |
2077 | SCM step = SCM_CAR (steps); | |
2078 | step = SCM_EQ_P (step, name) ? SCM_EOL : scm_list_1 (step); | |
2079 | ||
2080 | bindings = scm_cons (scm_cons2 (name, init, step), bindings); | |
2081 | ||
2082 | names = SCM_CDR (names); | |
2083 | inits = SCM_CDR (inits); | |
2084 | steps = SCM_CDR (steps); | |
6dbd0af5 | 2085 | } |
8ea46249 DH |
2086 | z = scm_cons (test, SCM_UNSPECIFIED); |
2087 | ls = scm_cons2 (scm_sym_do, bindings, z); | |
2088 | ||
2089 | x = scm_cons (SCM_BOOL_F, memoized_body); | |
2090 | break; | |
2091 | } | |
1b43d24c | 2092 | case SCM_BIT7 (SCM_IM_IF): |
8ea46249 DH |
2093 | ls = z = scm_cons (scm_sym_if, SCM_UNSPECIFIED); |
2094 | break; | |
1b43d24c | 2095 | case SCM_BIT7 (SCM_IM_LET): |
8ea46249 DH |
2096 | { |
2097 | /* format: (#@let (nk nk-1 ...) (i1 ... ik) b1 ...), | |
2098 | * where nx is the name of a local variable, ix is an initializer for | |
2099 | * the local variable and by are the body clauses. */ | |
60a49842 | 2100 | SCM rnames, rinits, bindings; |
8ea46249 DH |
2101 | |
2102 | x = SCM_CDR (x); | |
60a49842 | 2103 | rnames = SCM_CAR (x); |
8ea46249 | 2104 | x = SCM_CDR (x); |
60a49842 DH |
2105 | rinits = scm_reverse (unmemocopy (SCM_CAR (x), env)); |
2106 | env = SCM_EXTEND_ENV (rnames, SCM_EOL, env); | |
8ea46249 | 2107 | |
60a49842 | 2108 | bindings = build_binding_list (rnames, rinits); |
8ea46249 DH |
2109 | z = scm_cons (bindings, SCM_UNSPECIFIED); |
2110 | ls = scm_cons (scm_sym_let, z); | |
2111 | break; | |
2112 | } | |
1b43d24c | 2113 | case SCM_BIT7 (SCM_IM_LETREC): |
8ea46249 | 2114 | { |
60a49842 DH |
2115 | /* format: (#@letrec (vn ... v2 v1) (i1 i2 ... in) b1 ...), |
2116 | * where vx is the name of a local variable, ix is an initializer for | |
8ea46249 | 2117 | * the local variable and by are the body clauses. */ |
60a49842 | 2118 | SCM rnames, rinits, bindings; |
8ea46249 DH |
2119 | |
2120 | x = SCM_CDR (x); | |
60a49842 DH |
2121 | rnames = SCM_CAR (x); |
2122 | env = SCM_EXTEND_ENV (rnames, SCM_EOL, env); | |
8ea46249 | 2123 | x = SCM_CDR (x); |
60a49842 | 2124 | rinits = scm_reverse (unmemocopy (SCM_CAR (x), env)); |
8ea46249 | 2125 | |
60a49842 | 2126 | bindings = build_binding_list (rnames, rinits); |
8ea46249 DH |
2127 | z = scm_cons (bindings, SCM_UNSPECIFIED); |
2128 | ls = scm_cons (scm_sym_letrec, z); | |
6dbd0af5 MD |
2129 | break; |
2130 | } | |
1b43d24c | 2131 | case SCM_BIT7 (SCM_IM_LETSTAR): |
6dbd0af5 MD |
2132 | { |
2133 | SCM b, y; | |
2134 | x = SCM_CDR (x); | |
2135 | b = SCM_CAR (x); | |
2136 | y = SCM_EOL; | |
2137 | if SCM_IMP (b) | |
2138 | { | |
821f18a4 | 2139 | env = SCM_EXTEND_ENV (SCM_EOL, SCM_EOL, env); |
6dbd0af5 MD |
2140 | goto letstar; |
2141 | } | |
2142 | y = z = scm_acons (SCM_CAR (b), | |
2143 | unmemocar ( | |
8ea46249 | 2144 | scm_cons (unmemocopy (SCM_CADR (b), env), SCM_EOL), env), |
6dbd0af5 | 2145 | SCM_UNSPECIFIED); |
821f18a4 | 2146 | env = SCM_EXTEND_ENV (SCM_CAR (b), SCM_BOOL_F, env); |
8ea46249 | 2147 | b = SCM_CDDR (b); |
6dbd0af5 MD |
2148 | if (SCM_IMP (b)) |
2149 | { | |
2150 | SCM_SETCDR (y, SCM_EOL); | |
05b15362 DH |
2151 | z = scm_cons (y, SCM_UNSPECIFIED); |
2152 | ls = scm_cons (scm_sym_let, z); | |
6dbd0af5 MD |
2153 | break; |
2154 | } | |
2155 | do | |
2156 | { | |
a23afe53 MD |
2157 | SCM_SETCDR (z, scm_acons (SCM_CAR (b), |
2158 | unmemocar ( | |
8ea46249 | 2159 | scm_list_1 (unmemocopy (SCM_CADR (b), env)), env), |
a23afe53 MD |
2160 | SCM_UNSPECIFIED)); |
2161 | z = SCM_CDR (z); | |
821f18a4 | 2162 | env = SCM_EXTEND_ENV (SCM_CAR (b), SCM_BOOL_F, env); |
8ea46249 | 2163 | b = SCM_CDDR (b); |
6dbd0af5 | 2164 | } |
ff467021 | 2165 | while (SCM_NIMP (b)); |
a23afe53 | 2166 | SCM_SETCDR (z, SCM_EOL); |
6dbd0af5 | 2167 | letstar: |
05b15362 DH |
2168 | z = scm_cons (y, SCM_UNSPECIFIED); |
2169 | ls = scm_cons (scm_sym_letstar, z); | |
6dbd0af5 MD |
2170 | break; |
2171 | } | |
1b43d24c | 2172 | case SCM_BIT7 (SCM_IM_OR): |
2f0d1375 | 2173 | ls = z = scm_cons (scm_sym_or, SCM_UNSPECIFIED); |
6dbd0af5 | 2174 | break; |
1b43d24c | 2175 | case SCM_BIT7 (SCM_IM_LAMBDA): |
6dbd0af5 | 2176 | x = SCM_CDR (x); |
8ea46249 DH |
2177 | z = scm_cons (SCM_CAR (x), SCM_UNSPECIFIED); |
2178 | ls = scm_cons (scm_sym_lambda, z); | |
821f18a4 | 2179 | env = SCM_EXTEND_ENV (SCM_CAR (x), SCM_EOL, env); |
6dbd0af5 | 2180 | break; |
1b43d24c | 2181 | case SCM_BIT7 (SCM_IM_QUOTE): |
2f0d1375 | 2182 | ls = z = scm_cons (scm_sym_quote, SCM_UNSPECIFIED); |
6dbd0af5 | 2183 | break; |
1b43d24c | 2184 | case SCM_BIT7 (SCM_IM_SET_X): |
89efbff4 | 2185 | ls = z = scm_cons (scm_sym_set_x, SCM_UNSPECIFIED); |
6dbd0af5 | 2186 | break; |
1b43d24c | 2187 | case SCM_BIT7 (SCM_MAKISYM (0)): |
6dbd0af5 | 2188 | z = SCM_CAR (x); |
ff467021 | 2189 | switch (SCM_ISYMNUM (z)) |
6dbd0af5 | 2190 | { |
22f2cf2d DH |
2191 | case (SCM_ISYMNUM (SCM_IM_DEFINE)): |
2192 | { | |
2193 | SCM n; | |
2194 | x = SCM_CDR (x); | |
2195 | n = SCM_CAR (x); | |
2196 | z = scm_cons (n, SCM_UNSPECIFIED); | |
2197 | ls = scm_cons (scm_sym_define, z); | |
2198 | if (!SCM_NULLP (env)) | |
2199 | env = scm_cons (scm_cons (scm_cons (n, SCM_CAAR (env)), | |
2200 | SCM_CDAR (env)), | |
2201 | SCM_CDR (env)); | |
2202 | break; | |
2203 | } | |
6dbd0af5 | 2204 | case (SCM_ISYMNUM (SCM_IM_APPLY)): |
2f0d1375 | 2205 | ls = z = scm_cons (scm_sym_atapply, SCM_UNSPECIFIED); |
6dbd0af5 MD |
2206 | goto loop; |
2207 | case (SCM_ISYMNUM (SCM_IM_CONT)): | |
2f0d1375 | 2208 | ls = z = scm_cons (scm_sym_atcall_cc, SCM_UNSPECIFIED); |
6dbd0af5 | 2209 | goto loop; |
a570e93a MD |
2210 | case (SCM_ISYMNUM (SCM_IM_DELAY)): |
2211 | ls = z = scm_cons (scm_sym_delay, SCM_UNSPECIFIED); | |
2212 | x = SCM_CDR (x); | |
2213 | goto loop; | |
28d52ebb | 2214 | case (SCM_ISYMNUM (SCM_IM_FUTURE)): |
ebf9b47c | 2215 | ls = z = scm_cons (scm_sym_future, SCM_UNSPECIFIED); |
28d52ebb MD |
2216 | x = SCM_CDR (x); |
2217 | goto loop; | |
a513ead3 MV |
2218 | case (SCM_ISYMNUM (SCM_IM_CALL_WITH_VALUES)): |
2219 | ls = z = scm_cons (scm_sym_at_call_with_values, SCM_UNSPECIFIED); | |
2220 | goto loop; | |
2a6f7afe DH |
2221 | case (SCM_ISYMNUM (SCM_IM_ELSE)): |
2222 | ls = z = scm_cons (scm_sym_else, SCM_UNSPECIFIED); | |
2223 | goto loop; | |
6dbd0af5 | 2224 | default: |
fa888178 | 2225 | /* appease the Sun compiler god: */ ; |
6dbd0af5 | 2226 | } |
6dbd0af5 MD |
2227 | default: |
2228 | ls = z = unmemocar (scm_cons (unmemocopy (SCM_CAR (x), env), | |
2229 | SCM_UNSPECIFIED), | |
2230 | env); | |
2231 | } | |
2232 | loop: | |
8c494e99 DH |
2233 | x = SCM_CDR (x); |
2234 | while (SCM_CONSP (x)) | |
a23afe53 | 2235 | { |
8c494e99 DH |
2236 | SCM form = SCM_CAR (x); |
2237 | if (!SCM_ISYMP (form)) | |
2238 | { | |
2239 | SCM copy = scm_cons (unmemocopy (form, env), SCM_UNSPECIFIED); | |
2240 | SCM_SETCDR (z, unmemocar (copy, env)); | |
2241 | z = SCM_CDR (z); | |
2242 | } | |
609a8b86 DH |
2243 | else if (SCM_EQ_P (form, SCM_IM_ARROW)) |
2244 | { | |
2245 | SCM_SETCDR (z, scm_cons (scm_sym_arrow, SCM_UNSPECIFIED)); | |
2246 | z = SCM_CDR (z); | |
2247 | } | |
8c494e99 | 2248 | x = SCM_CDR (x); |
a23afe53 MD |
2249 | } |
2250 | SCM_SETCDR (z, x); | |
01f11e02 | 2251 | if (!SCM_FALSEP (p)) |
6dbd0af5 | 2252 | scm_whash_insert (scm_source_whash, ls, p); |
6dbd0af5 MD |
2253 | return ls; |
2254 | } | |
2255 | ||
1cc91f1b | 2256 | |
6dbd0af5 | 2257 | SCM |
6e8d25a6 | 2258 | scm_unmemocopy (SCM x, SCM env) |
6dbd0af5 | 2259 | { |
01f11e02 | 2260 | if (!SCM_NULLP (env)) |
6dbd0af5 MD |
2261 | /* Make a copy of the lowest frame to protect it from |
2262 | modifications by SCM_IM_DEFINE */ | |
2263 | return unmemocopy (x, scm_cons (SCM_CAR (env), SCM_CDR (env))); | |
2264 | else | |
2265 | return unmemocopy (x, env); | |
2266 | } | |
2267 | ||
1cc91f1b | 2268 | |
0f2d19dd | 2269 | int |
6e8d25a6 | 2270 | scm_badargsp (SCM formals, SCM args) |
0f2d19dd | 2271 | { |
6a0f6ff3 | 2272 | while (!SCM_NULLP (formals)) |
0f2d19dd | 2273 | { |
01f11e02 | 2274 | if (!SCM_CONSP (formals)) |
ff467021 | 2275 | return 0; |
6a0f6ff3 | 2276 | if (SCM_NULLP (args)) |
ff467021 | 2277 | return 1; |
0f2d19dd JB |
2278 | formals = SCM_CDR (formals); |
2279 | args = SCM_CDR (args); | |
2280 | } | |
01f11e02 | 2281 | return !SCM_NULLP (args) ? 1 : 0; |
0f2d19dd | 2282 | } |
a392ee15 | 2283 | |
0f2d19dd | 2284 | \f |
6dbd0af5 | 2285 | SCM |
6e8d25a6 | 2286 | scm_eval_args (SCM l, SCM env, SCM proc) |
6dbd0af5 | 2287 | { |
680ed4a8 | 2288 | SCM results = SCM_EOL, *lloc = &results, res; |
904a077d | 2289 | while (SCM_CONSP (l)) |
6dbd0af5 | 2290 | { |
680ed4a8 | 2291 | res = EVALCAR (l, env); |
904a077d | 2292 | |
8ea46249 | 2293 | *lloc = scm_list_1 (res); |
a23afe53 | 2294 | lloc = SCM_CDRLOC (*lloc); |
6dbd0af5 MD |
2295 | l = SCM_CDR (l); |
2296 | } | |
22a52da1 | 2297 | if (!SCM_NULLP (l)) |
904a077d | 2298 | scm_wrong_num_args (proc); |
680ed4a8 | 2299 | return results; |
6dbd0af5 | 2300 | } |
c4ac4d88 | 2301 | |
d0b07b5d | 2302 | |
9de33deb MD |
2303 | SCM |
2304 | scm_eval_body (SCM code, SCM env) | |
2305 | { | |
2306 | SCM next; | |
2307 | again: | |
01f11e02 DH |
2308 | next = SCM_CDR (code); |
2309 | while (!SCM_NULLP (next)) | |
9de33deb MD |
2310 | { |
2311 | if (SCM_IMP (SCM_CAR (code))) | |
2312 | { | |
2313 | if (SCM_ISYMP (SCM_CAR (code))) | |
2314 | { | |
28d52ebb | 2315 | scm_rec_mutex_lock (&source_mutex); |
9bc4701c MD |
2316 | /* check for race condition */ |
2317 | if (SCM_ISYMP (SCM_CAR (code))) | |
328dc9a3 | 2318 | code = m_expand_body (code, env); |
28d52ebb | 2319 | scm_rec_mutex_unlock (&source_mutex); |
9de33deb MD |
2320 | goto again; |
2321 | } | |
2322 | } | |
2323 | else | |
2324 | SCM_XEVAL (SCM_CAR (code), env); | |
2325 | code = next; | |
01f11e02 | 2326 | next = SCM_CDR (code); |
9de33deb MD |
2327 | } |
2328 | return SCM_XEVALCAR (code, env); | |
2329 | } | |
2330 | ||
0f2d19dd JB |
2331 | #endif /* !DEVAL */ |
2332 | ||
6dbd0af5 MD |
2333 | |
2334 | /* SECTION: This code is specific for the debugging support. One | |
2335 | * branch is read when DEVAL isn't defined, the other when DEVAL is | |
2336 | * defined. | |
2337 | */ | |
2338 | ||
2339 | #ifndef DEVAL | |
2340 | ||
2341 | #define SCM_APPLY scm_apply | |
2342 | #define PREP_APPLY(proc, args) | |
2343 | #define ENTER_APPLY | |
ddea3325 | 2344 | #define RETURN(x) do { return x; } while (0) |
b7ff98dd MD |
2345 | #ifdef STACK_CHECKING |
2346 | #ifndef NO_CEVAL_STACK_CHECKING | |
2347 | #define EVAL_STACK_CHECKING | |
2348 | #endif | |
6dbd0af5 MD |
2349 | #endif |
2350 | ||
2351 | #else /* !DEVAL */ | |
2352 | ||
0f2d19dd JB |
2353 | #undef SCM_CEVAL |
2354 | #define SCM_CEVAL scm_deval /* Substitute all uses of scm_ceval */ | |
2355 | #undef SCM_APPLY | |
2356 | #define SCM_APPLY scm_dapply | |
6dbd0af5 MD |
2357 | #undef PREP_APPLY |
2358 | #define PREP_APPLY(p, l) \ | |
2359 | { ++debug.info; debug.info->a.proc = p; debug.info->a.args = l; } | |
2360 | #undef ENTER_APPLY | |
2361 | #define ENTER_APPLY \ | |
d3a6bc94 | 2362 | do { \ |
b7ff98dd | 2363 | SCM_SET_ARGSREADY (debug);\ |
5132eef0 | 2364 | if (scm_check_apply_p && SCM_TRAPS_P)\ |
b7ff98dd | 2365 | if (SCM_APPLY_FRAME_P || (SCM_TRACE_P && PROCTRACEP (proc)))\ |
6dbd0af5 | 2366 | {\ |
156dcb09 | 2367 | SCM tmp, tail = SCM_BOOL(SCM_TRACED_FRAME_P (debug)); \ |
c6a4fbce | 2368 | SCM_SET_TRACED_FRAME (debug); \ |
d95c0b76 | 2369 | SCM_TRAPS_P = 0;\ |
b7ff98dd | 2370 | if (SCM_CHEAPTRAPS_P)\ |
6dbd0af5 | 2371 | {\ |
c0ab1b8d | 2372 | tmp = scm_make_debugobj (&debug);\ |
d95c0b76 | 2373 | scm_call_3 (SCM_APPLY_FRAME_HDLR, scm_sym_apply_frame, tmp, tail);\ |
b6d75948 | 2374 | }\ |
6dbd0af5 MD |
2375 | else\ |
2376 | {\ | |
5f144b10 GH |
2377 | int first;\ |
2378 | tmp = scm_make_continuation (&first);\ | |
2379 | if (first)\ | |
d95c0b76 | 2380 | scm_call_3 (SCM_APPLY_FRAME_HDLR, scm_sym_apply_frame, tmp, tail);\ |
6dbd0af5 | 2381 | }\ |
d95c0b76 | 2382 | SCM_TRAPS_P = 1;\ |
6dbd0af5 | 2383 | }\ |
d3a6bc94 | 2384 | } while (0) |
0f2d19dd | 2385 | #undef RETURN |
ddea3325 | 2386 | #define RETURN(e) do { proc = (e); goto exit; } while (0) |
b7ff98dd MD |
2387 | #ifdef STACK_CHECKING |
2388 | #ifndef EVAL_STACK_CHECKING | |
2389 | #define EVAL_STACK_CHECKING | |
2390 | #endif | |
6dbd0af5 MD |
2391 | #endif |
2392 | ||
2393 | /* scm_ceval_ptr points to the currently selected evaluator. | |
2394 | * *fixme*: Although efficiency is important here, this state variable | |
2395 | * should probably not be a global. It should be related to the | |
2396 | * current repl. | |
2397 | */ | |
2398 | ||
1cc91f1b | 2399 | |
1bbd0b84 | 2400 | SCM (*scm_ceval_ptr) (SCM x, SCM env); |
0f2d19dd | 2401 | |
1646d37b | 2402 | /* scm_last_debug_frame contains a pointer to the last debugging |
6dbd0af5 MD |
2403 | * information stack frame. It is accessed very often from the |
2404 | * debugging evaluator, so it should probably not be indirectly | |
2405 | * addressed. Better to save and restore it from the current root at | |
2406 | * any stack swaps. | |
2407 | */ | |
2408 | ||
6dbd0af5 MD |
2409 | /* scm_debug_eframe_size is the number of slots available for pseudo |
2410 | * stack frames at each real stack frame. | |
2411 | */ | |
2412 | ||
c014a02e | 2413 | long scm_debug_eframe_size; |
6dbd0af5 | 2414 | |
b7ff98dd | 2415 | int scm_debug_mode, scm_check_entry_p, scm_check_apply_p, scm_check_exit_p; |
6dbd0af5 | 2416 | |
c014a02e | 2417 | long scm_eval_stack; |
a74145b8 | 2418 | |
92c2555f | 2419 | scm_t_option scm_eval_opts[] = { |
a74145b8 | 2420 | { SCM_OPTION_INTEGER, "stack", 22000, "Size of thread stacks (in machine words)." } |
33b97402 MD |
2421 | }; |
2422 | ||
92c2555f | 2423 | scm_t_option scm_debug_opts[] = { |
b7ff98dd MD |
2424 | { SCM_OPTION_BOOLEAN, "cheap", 1, |
2425 | "*Flyweight representation of the stack at traps." }, | |
2426 | { SCM_OPTION_BOOLEAN, "breakpoints", 0, "*Check for breakpoints." }, | |
2427 | { SCM_OPTION_BOOLEAN, "trace", 0, "*Trace mode." }, | |
2428 | { SCM_OPTION_BOOLEAN, "procnames", 1, | |
2429 | "Record procedure names at definition." }, | |
2430 | { SCM_OPTION_BOOLEAN, "backwards", 0, | |
2431 | "Display backtrace in anti-chronological order." }, | |
274dc5fd | 2432 | { SCM_OPTION_INTEGER, "width", 79, "Maximal width of backtrace." }, |
4e646a03 MD |
2433 | { SCM_OPTION_INTEGER, "indent", 10, "Maximal indentation in backtrace." }, |
2434 | { SCM_OPTION_INTEGER, "frames", 3, | |
b7ff98dd | 2435 | "Maximum number of tail-recursive frames in backtrace." }, |
4e646a03 MD |
2436 | { SCM_OPTION_INTEGER, "maxdepth", 1000, |
2437 | "Maximal number of stored backtrace frames." }, | |
2438 | { SCM_OPTION_INTEGER, "depth", 20, "Maximal length of printed backtrace." }, | |
11f77bfc MD |
2439 | { SCM_OPTION_BOOLEAN, "backtrace", 0, "Show backtrace on error." }, |
2440 | { SCM_OPTION_BOOLEAN, "debug", 0, "Use the debugging evaluator." }, | |
863e833b | 2441 | { SCM_OPTION_INTEGER, "stack", 20000, "Stack size limit (measured in words; 0 = no check)." }, |
d95c0b76 | 2442 | { 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 |
2443 | }; |
2444 | ||
92c2555f | 2445 | scm_t_option scm_evaluator_trap_table[] = { |
b6d75948 | 2446 | { SCM_OPTION_BOOLEAN, "traps", 0, "Enable evaluator traps." }, |
b7ff98dd MD |
2447 | { SCM_OPTION_BOOLEAN, "enter-frame", 0, "Trap when eval enters new frame." }, |
2448 | { SCM_OPTION_BOOLEAN, "apply-frame", 0, "Trap when entering apply." }, | |
d95c0b76 NJ |
2449 | { SCM_OPTION_BOOLEAN, "exit-frame", 0, "Trap when exiting eval or apply." }, |
2450 | { SCM_OPTION_SCM, "enter-frame-handler", (unsigned long)SCM_BOOL_F, "Handler for enter-frame traps." }, | |
2451 | { SCM_OPTION_SCM, "apply-frame-handler", (unsigned long)SCM_BOOL_F, "Handler for apply-frame traps." }, | |
2452 | { SCM_OPTION_SCM, "exit-frame-handler", (unsigned long)SCM_BOOL_F, "Handler for exit-frame traps." } | |
6dbd0af5 MD |
2453 | }; |
2454 | ||
a1ec6916 | 2455 | SCM_DEFINE (scm_eval_options_interface, "eval-options-interface", 0, 1, 0, |
1bbd0b84 | 2456 | (SCM setting), |
b3f26b14 MG |
2457 | "Option interface for the evaluation options. Instead of using\n" |
2458 | "this procedure directly, use the procedures @code{eval-enable},\n" | |
3939e9df | 2459 | "@code{eval-disable}, @code{eval-set!} and @code{eval-options}.") |
1bbd0b84 | 2460 | #define FUNC_NAME s_scm_eval_options_interface |
33b97402 MD |
2461 | { |
2462 | SCM ans; | |
2463 | SCM_DEFER_INTS; | |
2464 | ans = scm_options (setting, | |
2465 | scm_eval_opts, | |
2466 | SCM_N_EVAL_OPTIONS, | |
1bbd0b84 | 2467 | FUNC_NAME); |
a74145b8 | 2468 | scm_eval_stack = SCM_EVAL_STACK * sizeof (void *); |
33b97402 MD |
2469 | SCM_ALLOW_INTS; |
2470 | return ans; | |
2471 | } | |
1bbd0b84 | 2472 | #undef FUNC_NAME |
33b97402 | 2473 | |
d0b07b5d | 2474 | |
a1ec6916 | 2475 | SCM_DEFINE (scm_evaluator_traps, "evaluator-traps-interface", 0, 1, 0, |
1bbd0b84 | 2476 | (SCM setting), |
b3f26b14 | 2477 | "Option interface for the evaluator trap options.") |
1bbd0b84 | 2478 | #define FUNC_NAME s_scm_evaluator_traps |
33b97402 MD |
2479 | { |
2480 | SCM ans; | |
2481 | SCM_DEFER_INTS; | |
2482 | ans = scm_options (setting, | |
2483 | scm_evaluator_trap_table, | |
2484 | SCM_N_EVALUATOR_TRAPS, | |
1bbd0b84 | 2485 | FUNC_NAME); |
33b97402 | 2486 | SCM_RESET_DEBUG_MODE; |
bfc69694 | 2487 | SCM_ALLOW_INTS; |
33b97402 MD |
2488 | return ans; |
2489 | } | |
1bbd0b84 | 2490 | #undef FUNC_NAME |
33b97402 | 2491 | |
d0b07b5d | 2492 | |
24933780 | 2493 | static SCM |
a392ee15 | 2494 | deval_args (SCM l, SCM env, SCM proc, SCM *lloc) |
0f2d19dd | 2495 | { |
680ed4a8 | 2496 | SCM *results = lloc, res; |
904a077d | 2497 | while (SCM_CONSP (l)) |
0f2d19dd | 2498 | { |
680ed4a8 | 2499 | res = EVALCAR (l, env); |
904a077d | 2500 | |
8ea46249 | 2501 | *lloc = scm_list_1 (res); |
a23afe53 | 2502 | lloc = SCM_CDRLOC (*lloc); |
0f2d19dd JB |
2503 | l = SCM_CDR (l); |
2504 | } | |
22a52da1 | 2505 | if (!SCM_NULLP (l)) |
904a077d | 2506 | scm_wrong_num_args (proc); |
680ed4a8 | 2507 | return *results; |
0f2d19dd JB |
2508 | } |
2509 | ||
6dbd0af5 MD |
2510 | #endif /* !DEVAL */ |
2511 | ||
2512 | ||
a392ee15 | 2513 | /* SECTION: This code is compiled twice. |
6dbd0af5 MD |
2514 | */ |
2515 | ||
a392ee15 | 2516 | |
d9d39d76 | 2517 | /* Update the toplevel environment frame ENV so that it refers to the |
a392ee15 | 2518 | * current module. */ |
d9d39d76 MV |
2519 | #define UPDATE_TOPLEVEL_ENV(env) \ |
2520 | do { \ | |
2521 | SCM p = scm_current_module_lookup_closure (); \ | |
d0b07b5d | 2522 | if (p != SCM_CAR (env)) \ |
d9d39d76 MV |
2523 | env = scm_top_level_env (p); \ |
2524 | } while (0) | |
2525 | ||
6dbd0af5 | 2526 | |
a392ee15 DH |
2527 | /* This is the evaluator. Like any real monster, it has three heads: |
2528 | * | |
2529 | * scm_ceval is the non-debugging evaluator, scm_deval is the debugging | |
2530 | * version. Both are implemented using a common code base, using the | |
2531 | * following mechanism: SCM_CEVAL is a macro, which is either defined to | |
2532 | * scm_ceval or scm_deval. Thus, there is no function SCM_CEVAL, but the code | |
2533 | * for SCM_CEVAL actually compiles to either scm_ceval or scm_deval. When | |
2534 | * SCM_CEVAL is defined to scm_ceval, it is known that the macro DEVAL is not | |
2535 | * defined. When SCM_CEVAL is defined to scm_deval, then the macro DEVAL is | |
2536 | * known to be defined. Thus, in SCM_CEVAL parts for the debugging evaluator | |
2537 | * are enclosed within #ifdef DEVAL ... #endif. | |
2538 | * | |
2539 | * All three (scm_ceval, scm_deval and their common implementation SCM_CEVAL) | |
2540 | * take two input parameters, x and env: x is a single expression to be | |
2541 | * evalutated. env is the environment in which bindings are searched. | |
2542 | * | |
2543 | * x is known to be a cell (i. e. a pair or any other non-immediate). Since x | |
2544 | * is a single expression, it is necessarily in a tail position. If x is just | |
2545 | * a call to another function like in the expression (foo exp1 exp2 ...), the | |
2546 | * realization of that call therefore _must_not_ increase stack usage (the | |
2547 | * evaluation of exp1, exp2 etc., however, may do so). This is realized by | |
2548 | * making extensive use of 'goto' statements within the evaluator: The gotos | |
2549 | * replace recursive calls to SCM_CEVAL, thus re-using the same stack frame | |
2550 | * that SCM_CEVAL was already using. If, however, x represents some form that | |
2551 | * requires to evaluate a sequence of expressions like (begin exp1 exp2 ...), | |
2552 | * then recursive calls to SCM_CEVAL are performed for all but the last | |
2553 | * expression of that sequence. */ | |
6dbd0af5 | 2554 | |
0f2d19dd | 2555 | #if 0 |
0f2d19dd | 2556 | SCM |
1bbd0b84 | 2557 | scm_ceval (SCM x, SCM env) |
0f2d19dd JB |
2558 | {} |
2559 | #endif | |
1cc91f1b | 2560 | |
a392ee15 | 2561 | #if 0 |
0f2d19dd | 2562 | SCM |
1bbd0b84 | 2563 | scm_deval (SCM x, SCM env) |
0f2d19dd JB |
2564 | {} |
2565 | #endif | |
2566 | ||
6dbd0af5 | 2567 | SCM |
1bbd0b84 | 2568 | SCM_CEVAL (SCM x, SCM env) |
0f2d19dd | 2569 | { |
42030fb2 | 2570 | SCM proc, arg1; |
6dbd0af5 | 2571 | #ifdef DEVAL |
92c2555f MV |
2572 | scm_t_debug_frame debug; |
2573 | scm_t_debug_info *debug_info_end; | |
1646d37b | 2574 | debug.prev = scm_last_debug_frame; |
020c890c | 2575 | debug.status = 0; |
04b6c081 | 2576 | /* |
92c2555f | 2577 | * The debug.vect contains twice as much scm_t_debug_info frames as the |
04b6c081 MD |
2578 | * user has specified with (debug-set! frames <n>). |
2579 | * | |
2580 | * Even frames are eval frames, odd frames are apply frames. | |
2581 | */ | |
92c2555f | 2582 | debug.vect = (scm_t_debug_info *) alloca (scm_debug_eframe_size |
a392ee15 | 2583 | * sizeof (scm_t_debug_info)); |
c0ab1b8d JB |
2584 | debug.info = debug.vect; |
2585 | debug_info_end = debug.vect + scm_debug_eframe_size; | |
2586 | scm_last_debug_frame = &debug; | |
6dbd0af5 | 2587 | #endif |
b7ff98dd | 2588 | #ifdef EVAL_STACK_CHECKING |
79f55b7c | 2589 | if (scm_stack_checking_enabled_p && SCM_STACK_OVERFLOW_P (&proc)) |
6dbd0af5 | 2590 | { |
b7ff98dd | 2591 | #ifdef DEVAL |
6dbd0af5 MD |
2592 | debug.info->e.exp = x; |
2593 | debug.info->e.env = env; | |
b7ff98dd | 2594 | #endif |
6dbd0af5 MD |
2595 | scm_report_stack_overflow (); |
2596 | } | |
2597 | #endif | |
6a0f6ff3 | 2598 | |
6dbd0af5 MD |
2599 | #ifdef DEVAL |
2600 | goto start; | |
2601 | #endif | |
6a0f6ff3 | 2602 | |
6dbd0af5 MD |
2603 | loop: |
2604 | #ifdef DEVAL | |
b7ff98dd MD |
2605 | SCM_CLEAR_ARGSREADY (debug); |
2606 | if (SCM_OVERFLOWP (debug)) | |
6dbd0af5 | 2607 | --debug.info; |
04b6c081 MD |
2608 | /* |
2609 | * In theory, this should be the only place where it is necessary to | |
2610 | * check for space in debug.vect since both eval frames and | |
2611 | * available space are even. | |
2612 | * | |
2613 | * For this to be the case, however, it is necessary that primitive | |
2614 | * special forms which jump back to `loop', `begin' or some similar | |
680516ba | 2615 | * label call PREP_APPLY. |
04b6c081 | 2616 | */ |
c0ab1b8d | 2617 | else if (++debug.info >= debug_info_end) |
6dbd0af5 | 2618 | { |
b7ff98dd | 2619 | SCM_SET_OVERFLOW (debug); |
6dbd0af5 MD |
2620 | debug.info -= 2; |
2621 | } | |
6a0f6ff3 | 2622 | |
6dbd0af5 MD |
2623 | start: |
2624 | debug.info->e.exp = x; | |
2625 | debug.info->e.env = env; | |
5132eef0 DH |
2626 | if (scm_check_entry_p && SCM_TRAPS_P) |
2627 | { | |
bc76d628 DH |
2628 | if (SCM_ENTER_FRAME_P |
2629 | || (SCM_BREAKPOINTS_P && scm_c_source_property_breakpoint_p (x))) | |
5132eef0 | 2630 | { |
bc76d628 DH |
2631 | SCM stackrep; |
2632 | SCM tail = SCM_BOOL (SCM_TAILRECP (debug)); | |
5132eef0 DH |
2633 | SCM_SET_TAILREC (debug); |
2634 | if (SCM_CHEAPTRAPS_P) | |
bc76d628 | 2635 | stackrep = scm_make_debugobj (&debug); |
5132eef0 DH |
2636 | else |
2637 | { | |
2638 | int first; | |
2639 | SCM val = scm_make_continuation (&first); | |
2640 | ||
2641 | if (first) | |
bc76d628 | 2642 | stackrep = val; |
5132eef0 DH |
2643 | else |
2644 | { | |
2645 | x = val; | |
2646 | if (SCM_IMP (x)) | |
2647 | RETURN (x); | |
2648 | else | |
2649 | /* This gives the possibility for the debugger to | |
2650 | modify the source expression before evaluation. */ | |
2651 | goto dispatch; | |
2652 | } | |
2653 | } | |
2654 | SCM_TRAPS_P = 0; | |
2655 | scm_call_4 (SCM_ENTER_FRAME_HDLR, | |
2656 | scm_sym_enter_frame, | |
bc76d628 | 2657 | stackrep, |
5132eef0 DH |
2658 | tail, |
2659 | scm_unmemocopy (x, env)); | |
2660 | SCM_TRAPS_P = 1; | |
2661 | } | |
2662 | } | |
6dbd0af5 | 2663 | #endif |
f8769b1d | 2664 | dispatch: |
9cb5124f | 2665 | SCM_TICK; |
0f2d19dd JB |
2666 | switch (SCM_TYP7 (x)) |
2667 | { | |
1b43d24c | 2668 | case SCM_BIT7 (SCM_IM_AND): |
0f2d19dd | 2669 | x = SCM_CDR (x); |
302c12b4 DH |
2670 | while (!SCM_NULLP (SCM_CDR (x))) |
2671 | { | |
38ace99e DH |
2672 | SCM test_result = EVALCAR (x, env); |
2673 | if (SCM_FALSEP (test_result) || SCM_NILP (test_result)) | |
0f2d19dd | 2674 | RETURN (SCM_BOOL_F); |
302c12b4 DH |
2675 | else |
2676 | x = SCM_CDR (x); | |
2677 | } | |
6dbd0af5 | 2678 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
2679 | goto carloop; |
2680 | ||
1b43d24c | 2681 | case SCM_BIT7 (SCM_IM_BEGIN): |
e050d4f8 DH |
2682 | x = SCM_CDR (x); |
2683 | if (SCM_NULLP (x)) | |
b8113bc8 MV |
2684 | RETURN (SCM_UNSPECIFIED); |
2685 | ||
6dbd0af5 | 2686 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
2687 | |
2688 | begin: | |
4163eb72 MV |
2689 | /* If we are on toplevel with a lookup closure, we need to sync |
2690 | with the current module. */ | |
22a52da1 | 2691 | if (SCM_CONSP (env) && !SCM_CONSP (SCM_CAR (env))) |
4163eb72 | 2692 | { |
d9d39d76 | 2693 | UPDATE_TOPLEVEL_ENV (env); |
302c12b4 | 2694 | while (!SCM_NULLP (SCM_CDR (x))) |
4163eb72 | 2695 | { |
5280aaca | 2696 | EVALCAR (x, env); |
d9d39d76 | 2697 | UPDATE_TOPLEVEL_ENV (env); |
302c12b4 | 2698 | x = SCM_CDR (x); |
4163eb72 | 2699 | } |
5280aaca | 2700 | goto carloop; |
4163eb72 MV |
2701 | } |
2702 | else | |
5280aaca MV |
2703 | goto nontoplevel_begin; |
2704 | ||
5280aaca | 2705 | nontoplevel_begin: |
302c12b4 | 2706 | while (!SCM_NULLP (SCM_CDR (x))) |
0f2d19dd | 2707 | { |
6a0f6ff3 DH |
2708 | SCM form = SCM_CAR (x); |
2709 | if (SCM_IMP (form)) | |
26d5b9b4 | 2710 | { |
6a0f6ff3 | 2711 | if (SCM_ISYMP (form)) |
26d5b9b4 | 2712 | { |
28d52ebb | 2713 | scm_rec_mutex_lock (&source_mutex); |
9bc4701c MD |
2714 | /* check for race condition */ |
2715 | if (SCM_ISYMP (SCM_CAR (x))) | |
328dc9a3 | 2716 | x = m_expand_body (x, env); |
28d52ebb | 2717 | scm_rec_mutex_unlock (&source_mutex); |
5280aaca | 2718 | goto nontoplevel_begin; |
26d5b9b4 | 2719 | } |
4163eb72 | 2720 | else |
6a0f6ff3 | 2721 | SCM_VALIDATE_NON_EMPTY_COMBINATION (form); |
26d5b9b4 | 2722 | } |
5280aaca | 2723 | else |
6a0f6ff3 | 2724 | SCM_CEVAL (form, env); |
302c12b4 | 2725 | x = SCM_CDR (x); |
0f2d19dd | 2726 | } |
5280aaca | 2727 | |
6a0f6ff3 DH |
2728 | carloop: |
2729 | { | |
2730 | /* scm_eval last form in list */ | |
2731 | SCM last_form = SCM_CAR (x); | |
0f2d19dd | 2732 | |
6a0f6ff3 DH |
2733 | if (SCM_CONSP (last_form)) |
2734 | { | |
2735 | /* This is by far the most frequent case. */ | |
2736 | x = last_form; | |
2737 | goto loop; /* tail recurse */ | |
2738 | } | |
2739 | else if (SCM_IMP (last_form)) | |
2740 | RETURN (SCM_EVALIM (last_form, env)); | |
2741 | else if (SCM_VARIABLEP (last_form)) | |
2742 | RETURN (SCM_VARIABLE_REF (last_form)); | |
2743 | else if (SCM_SYMBOLP (last_form)) | |
2744 | RETURN (*scm_lookupcar (x, env, 1)); | |
2745 | else | |
2746 | RETURN (last_form); | |
2747 | } | |
0f2d19dd JB |
2748 | |
2749 | ||
1b43d24c | 2750 | case SCM_BIT7 (SCM_IM_CASE): |
0f2d19dd | 2751 | x = SCM_CDR (x); |
6a0f6ff3 DH |
2752 | { |
2753 | SCM key = EVALCAR (x, env); | |
2754 | x = SCM_CDR (x); | |
2755 | while (!SCM_NULLP (x)) | |
2756 | { | |
2757 | SCM clause = SCM_CAR (x); | |
2758 | SCM labels = SCM_CAR (clause); | |
2a6f7afe | 2759 | if (SCM_EQ_P (labels, SCM_IM_ELSE)) |
6a0f6ff3 DH |
2760 | { |
2761 | x = SCM_CDR (clause); | |
2762 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2763 | goto begin; | |
2764 | } | |
2765 | while (!SCM_NULLP (labels)) | |
2766 | { | |
2767 | SCM label = SCM_CAR (labels); | |
2768 | if (SCM_EQ_P (label, key) || !SCM_FALSEP (scm_eqv_p (label, key))) | |
2769 | { | |
2770 | x = SCM_CDR (clause); | |
2771 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2772 | goto begin; | |
2773 | } | |
2774 | labels = SCM_CDR (labels); | |
2775 | } | |
2776 | x = SCM_CDR (x); | |
2777 | } | |
2778 | } | |
ddea3325 | 2779 | RETURN (SCM_UNSPECIFIED); |
0f2d19dd JB |
2780 | |
2781 | ||
1b43d24c | 2782 | case SCM_BIT7 (SCM_IM_COND): |
8ea46249 DH |
2783 | x = SCM_CDR (x); |
2784 | while (!SCM_NULLP (x)) | |
0f2d19dd | 2785 | { |
e5cb71a0 | 2786 | SCM clause = SCM_CAR (x); |
609a8b86 | 2787 | if (SCM_EQ_P (SCM_CAR (clause), SCM_IM_ELSE)) |
8ea46249 | 2788 | { |
e5cb71a0 | 2789 | x = SCM_CDR (clause); |
8ea46249 DH |
2790 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
2791 | goto begin; | |
2792 | } | |
e5cb71a0 | 2793 | else |
0f2d19dd | 2794 | { |
dff98306 DH |
2795 | arg1 = EVALCAR (clause, env); |
2796 | if (!SCM_FALSEP (arg1) && !SCM_NILP (arg1)) | |
6dbd0af5 | 2797 | { |
e5cb71a0 DH |
2798 | x = SCM_CDR (clause); |
2799 | if (SCM_NULLP (x)) | |
dff98306 | 2800 | RETURN (arg1); |
609a8b86 | 2801 | else if (!SCM_EQ_P (SCM_CAR (x), SCM_IM_ARROW)) |
e5cb71a0 DH |
2802 | { |
2803 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2804 | goto begin; | |
2805 | } | |
2806 | else | |
2807 | { | |
2808 | proc = SCM_CDR (x); | |
2809 | proc = EVALCAR (proc, env); | |
dff98306 | 2810 | PREP_APPLY (proc, scm_list_1 (arg1)); |
e5cb71a0 | 2811 | ENTER_APPLY; |
ddd8f927 | 2812 | goto evap1; |
e5cb71a0 | 2813 | } |
6dbd0af5 | 2814 | } |
e5cb71a0 | 2815 | x = SCM_CDR (x); |
0f2d19dd JB |
2816 | } |
2817 | } | |
ddea3325 | 2818 | RETURN (SCM_UNSPECIFIED); |
0f2d19dd JB |
2819 | |
2820 | ||
1b43d24c | 2821 | case SCM_BIT7 (SCM_IM_DO): |
0f2d19dd | 2822 | x = SCM_CDR (x); |
e5cb71a0 DH |
2823 | { |
2824 | /* Compute the initialization values and the initial environment. */ | |
e681d187 | 2825 | SCM init_forms = SCM_CAR (x); |
e5cb71a0 DH |
2826 | SCM init_values = SCM_EOL; |
2827 | while (!SCM_NULLP (init_forms)) | |
2828 | { | |
2829 | init_values = scm_cons (EVALCAR (init_forms, env), init_values); | |
2830 | init_forms = SCM_CDR (init_forms); | |
2831 | } | |
e681d187 | 2832 | x = SCM_CDR (x); |
821f18a4 | 2833 | env = SCM_EXTEND_ENV (SCM_CAR (x), init_values, env); |
e5cb71a0 | 2834 | } |
e681d187 | 2835 | x = SCM_CDR (x); |
e5cb71a0 DH |
2836 | { |
2837 | SCM test_form = SCM_CAR (x); | |
2838 | SCM body_forms = SCM_CADR (x); | |
2839 | SCM step_forms = SCM_CDDR (x); | |
2840 | ||
2841 | SCM test_result = EVALCAR (test_form, env); | |
2842 | ||
2843 | while (SCM_FALSEP (test_result) || SCM_NILP (test_result)) | |
2844 | { | |
0f2d19dd | 2845 | { |
e5cb71a0 DH |
2846 | /* Evaluate body forms. */ |
2847 | SCM temp_forms; | |
2848 | for (temp_forms = body_forms; | |
2849 | !SCM_NULLP (temp_forms); | |
2850 | temp_forms = SCM_CDR (temp_forms)) | |
2851 | { | |
2852 | SCM form = SCM_CAR (temp_forms); | |
2853 | /* Dirk:FIXME: We only need to eval forms, that may have a | |
2854 | * side effect here. This is only true for forms that start | |
2855 | * with a pair. All others are just constants. However, | |
2856 | * since in the common case there is no constant expression | |
2857 | * in a body of a do form, we just check for immediates here | |
2858 | * and have SCM_CEVAL take care of other cases. In the long | |
2859 | * run it would make sense to get rid of this test and have | |
2860 | * the macro transformer of 'do' eliminate all forms that | |
2861 | * have no sideeffect. */ | |
2862 | if (!SCM_IMP (form)) | |
2863 | SCM_CEVAL (form, env); | |
2864 | } | |
0f2d19dd | 2865 | } |
e5cb71a0 DH |
2866 | |
2867 | { | |
2868 | /* Evaluate the step expressions. */ | |
2869 | SCM temp_forms; | |
2870 | SCM step_values = SCM_EOL; | |
2871 | for (temp_forms = step_forms; | |
2872 | !SCM_NULLP (temp_forms); | |
2873 | temp_forms = SCM_CDR (temp_forms)) | |
2874 | { | |
2875 | SCM value = EVALCAR (temp_forms, env); | |
2876 | step_values = scm_cons (value, step_values); | |
2877 | } | |
821f18a4 DH |
2878 | env = SCM_EXTEND_ENV (SCM_CAAR (env), |
2879 | step_values, | |
2880 | SCM_CDR (env)); | |
e5cb71a0 DH |
2881 | } |
2882 | ||
2883 | test_result = EVALCAR (test_form, env); | |
2884 | } | |
2885 | } | |
2886 | x = SCM_CDAR (x); | |
0f2d19dd | 2887 | if (SCM_NULLP (x)) |
6dbd0af5 MD |
2888 | RETURN (SCM_UNSPECIFIED); |
2889 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
5280aaca | 2890 | goto nontoplevel_begin; |
0f2d19dd JB |
2891 | |
2892 | ||
1b43d24c | 2893 | case SCM_BIT7 (SCM_IM_IF): |
0f2d19dd | 2894 | x = SCM_CDR (x); |
38ace99e DH |
2895 | { |
2896 | SCM test_result = EVALCAR (x, env); | |
4610b011 DH |
2897 | x = SCM_CDR (x); /* then expression */ |
2898 | if (SCM_FALSEP (test_result) || SCM_NILP (test_result)) | |
38ace99e | 2899 | { |
4610b011 | 2900 | x = SCM_CDR (x); /* else expression */ |
38ace99e DH |
2901 | if (SCM_NULLP (x)) |
2902 | RETURN (SCM_UNSPECIFIED); | |
2903 | } | |
2904 | } | |
6dbd0af5 | 2905 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
2906 | goto carloop; |
2907 | ||
2908 | ||
1b43d24c | 2909 | case SCM_BIT7 (SCM_IM_LET): |
0f2d19dd | 2910 | x = SCM_CDR (x); |
38ace99e DH |
2911 | { |
2912 | SCM init_forms = SCM_CADR (x); | |
2913 | SCM init_values = SCM_EOL; | |
2914 | do | |
2915 | { | |
2916 | init_values = scm_cons (EVALCAR (init_forms, env), init_values); | |
2917 | init_forms = SCM_CDR (init_forms); | |
2918 | } | |
2919 | while (!SCM_NULLP (init_forms)); | |
821f18a4 | 2920 | env = SCM_EXTEND_ENV (SCM_CAR (x), init_values, env); |
38ace99e | 2921 | } |
e050d4f8 DH |
2922 | x = SCM_CDDR (x); |
2923 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2924 | goto nontoplevel_begin; | |
0f2d19dd JB |
2925 | |
2926 | ||
1b43d24c | 2927 | case SCM_BIT7 (SCM_IM_LETREC): |
0f2d19dd | 2928 | x = SCM_CDR (x); |
821f18a4 | 2929 | env = SCM_EXTEND_ENV (SCM_CAR (x), undefineds, env); |
0f2d19dd | 2930 | x = SCM_CDR (x); |
38ace99e DH |
2931 | { |
2932 | SCM init_forms = SCM_CAR (x); | |
2933 | SCM init_values = SCM_EOL; | |
2934 | do | |
2935 | { | |
2936 | init_values = scm_cons (EVALCAR (init_forms, env), init_values); | |
2937 | init_forms = SCM_CDR (init_forms); | |
2938 | } | |
2939 | while (!SCM_NULLP (init_forms)); | |
2940 | SCM_SETCDR (SCM_CAR (env), init_values); | |
2941 | } | |
e050d4f8 DH |
2942 | x = SCM_CDR (x); |
2943 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2944 | goto nontoplevel_begin; | |
0f2d19dd JB |
2945 | |
2946 | ||
1b43d24c | 2947 | case SCM_BIT7 (SCM_IM_LETSTAR): |
0f2d19dd | 2948 | x = SCM_CDR (x); |
302c12b4 DH |
2949 | { |
2950 | SCM bindings = SCM_CAR (x); | |
2951 | if (SCM_NULLP (bindings)) | |
821f18a4 | 2952 | env = SCM_EXTEND_ENV (SCM_EOL, SCM_EOL, env); |
302c12b4 DH |
2953 | else |
2954 | { | |
2955 | do | |
2956 | { | |
2957 | SCM name = SCM_CAR (bindings); | |
2958 | SCM init = SCM_CDR (bindings); | |
821f18a4 | 2959 | env = SCM_EXTEND_ENV (name, EVALCAR (init, env), env); |
302c12b4 DH |
2960 | bindings = SCM_CDR (init); |
2961 | } | |
2962 | while (!SCM_NULLP (bindings)); | |
2963 | } | |
2964 | } | |
e050d4f8 DH |
2965 | x = SCM_CDR (x); |
2966 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
2967 | goto nontoplevel_begin; | |
0f2d19dd | 2968 | |
302c12b4 | 2969 | |
1b43d24c | 2970 | case SCM_BIT7 (SCM_IM_OR): |
0f2d19dd | 2971 | x = SCM_CDR (x); |
302c12b4 | 2972 | while (!SCM_NULLP (SCM_CDR (x))) |
0f2d19dd | 2973 | { |
302c12b4 | 2974 | SCM val = EVALCAR (x, env); |
c96d76b8 | 2975 | if (!SCM_FALSEP (val) && !SCM_NILP (val)) |
302c12b4 DH |
2976 | RETURN (val); |
2977 | else | |
2978 | x = SCM_CDR (x); | |
0f2d19dd | 2979 | } |
6dbd0af5 | 2980 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
0f2d19dd JB |
2981 | goto carloop; |
2982 | ||
2983 | ||
1b43d24c | 2984 | case SCM_BIT7 (SCM_IM_LAMBDA): |
0f2d19dd JB |
2985 | RETURN (scm_closure (SCM_CDR (x), env)); |
2986 | ||
2987 | ||
1b43d24c | 2988 | case SCM_BIT7 (SCM_IM_QUOTE): |
8ea46249 | 2989 | RETURN (SCM_CADR (x)); |
0f2d19dd JB |
2990 | |
2991 | ||
1b43d24c | 2992 | case SCM_BIT7 (SCM_IM_SET_X): |
0f2d19dd | 2993 | x = SCM_CDR (x); |
38ace99e DH |
2994 | { |
2995 | SCM *location; | |
2996 | SCM variable = SCM_CAR (x); | |
e050d4f8 | 2997 | if (SCM_ILOCP (variable)) |
38ace99e | 2998 | location = scm_ilookup (variable, env); |
3063e30a | 2999 | else if (SCM_VARIABLEP (variable)) |
e050d4f8 | 3000 | location = SCM_VARIABLE_LOC (variable); |
38ace99e DH |
3001 | else /* (SCM_SYMBOLP (variable)) is known to be true */ |
3002 | location = scm_lookupcar (x, env, 1); | |
3003 | x = SCM_CDR (x); | |
3004 | *location = EVALCAR (x, env); | |
3005 | } | |
0f2d19dd | 3006 | RETURN (SCM_UNSPECIFIED); |
0f2d19dd JB |
3007 | |
3008 | ||
0f2d19dd | 3009 | /* new syntactic forms go here. */ |
1b43d24c | 3010 | case SCM_BIT7 (SCM_MAKISYM (0)): |
0f2d19dd | 3011 | proc = SCM_CAR (x); |
a392ee15 | 3012 | switch (SCM_ISYMNUM (proc)) |
0f2d19dd | 3013 | { |
3f04400d DH |
3014 | |
3015 | ||
22f2cf2d DH |
3016 | case (SCM_ISYMNUM (SCM_IM_DEFINE)): |
3017 | /* Top level defines are handled directly by the memoizer and thus | |
3018 | * will never generate memoized code with SCM_IM_DEFINE. Internal | |
3019 | * defines which occur at valid positions will be transformed into | |
3020 | * letrec expressions. Thus, whenever the executor detects | |
3021 | * SCM_IM_DEFINE, this must come from an internal definition at an | |
3022 | * illegal position. */ | |
3023 | scm_misc_error (NULL, "Bad define placement", SCM_EOL); | |
3024 | ||
3025 | ||
0f2d19dd | 3026 | case (SCM_ISYMNUM (SCM_IM_APPLY)): |
e910e9d2 DH |
3027 | x = SCM_CDR (x); |
3028 | proc = EVALCAR (x, env); | |
3029 | PREP_APPLY (proc, SCM_EOL); | |
3030 | x = SCM_CDR (x); | |
3031 | arg1 = EVALCAR (x, env); | |
9a069bdd DH |
3032 | |
3033 | apply_proc: | |
3034 | /* Go here to tail-apply a procedure. PROC is the procedure and | |
3035 | * ARG1 is the list of arguments. PREP_APPLY must have been called | |
3036 | * before jumping to apply_proc. */ | |
0f2d19dd JB |
3037 | if (SCM_CLOSUREP (proc)) |
3038 | { | |
9a069bdd | 3039 | SCM formals = SCM_CLOSURE_FORMALS (proc); |
6dbd0af5 | 3040 | #ifdef DEVAL |
9a069bdd | 3041 | debug.info->a.args = arg1; |
6dbd0af5 | 3042 | #endif |
9a069bdd DH |
3043 | if (scm_badargsp (formals, arg1)) |
3044 | scm_wrong_num_args (proc); | |
3045 | ENTER_APPLY; | |
3046 | /* Copy argument list */ | |
3047 | if (SCM_NULL_OR_NIL_P (arg1)) | |
3048 | env = SCM_EXTEND_ENV (formals, SCM_EOL, SCM_ENV (proc)); | |
3049 | else | |
3050 | { | |
3051 | SCM args = scm_list_1 (SCM_CAR (arg1)); | |
3052 | SCM tail = args; | |
3053 | arg1 = SCM_CDR (arg1); | |
3054 | while (!SCM_NULL_OR_NIL_P (arg1)) | |
3055 | { | |
3056 | SCM new_tail = scm_list_1 (SCM_CAR (arg1)); | |
3057 | SCM_SETCDR (tail, new_tail); | |
3058 | tail = new_tail; | |
3059 | arg1 = SCM_CDR (arg1); | |
3060 | } | |
3061 | env = SCM_EXTEND_ENV (formals, args, SCM_ENV (proc)); | |
3062 | } | |
3063 | ||
3064 | x = SCM_CLOSURE_BODY (proc); | |
3065 | goto nontoplevel_begin; | |
0f2d19dd | 3066 | } |
3f04400d DH |
3067 | else |
3068 | { | |
e910e9d2 DH |
3069 | ENTER_APPLY; |
3070 | RETURN (SCM_APPLY (proc, arg1, SCM_EOL)); | |
3f04400d DH |
3071 | } |
3072 | ||
0f2d19dd JB |
3073 | |
3074 | case (SCM_ISYMNUM (SCM_IM_CONT)): | |
5f144b10 GH |
3075 | { |
3076 | int first; | |
3077 | SCM val = scm_make_continuation (&first); | |
3078 | ||
e050d4f8 | 3079 | if (!first) |
5f144b10 | 3080 | RETURN (val); |
e050d4f8 DH |
3081 | else |
3082 | { | |
3083 | arg1 = val; | |
3084 | proc = SCM_CDR (x); | |
3085 | proc = scm_eval_car (proc, env); | |
e050d4f8 DH |
3086 | PREP_APPLY (proc, scm_list_1 (arg1)); |
3087 | ENTER_APPLY; | |
e050d4f8 DH |
3088 | goto evap1; |
3089 | } | |
5f144b10 | 3090 | } |
e050d4f8 | 3091 | |
0f2d19dd | 3092 | |
a570e93a | 3093 | case (SCM_ISYMNUM (SCM_IM_DELAY)): |
ddea3325 | 3094 | RETURN (scm_makprom (scm_closure (SCM_CDR (x), env))); |
a570e93a | 3095 | |
e050d4f8 | 3096 | |
28d52ebb MD |
3097 | case (SCM_ISYMNUM (SCM_IM_FUTURE)): |
3098 | RETURN (scm_i_make_future (scm_closure (SCM_CDR (x), env))); | |
3099 | ||
3100 | ||
c8e1d354 MD |
3101 | /* PLACEHOLDER for case (SCM_ISYMNUM (SCM_IM_DISPATCH)): The |
3102 | following code (type_dispatch) is intended to be the tail | |
3103 | of the case clause for the internal macro | |
3104 | SCM_IM_DISPATCH. Please don't remove it from this | |
3105 | location without discussing it with Mikael | |
3106 | <djurfeldt@nada.kth.se> */ | |
3107 | ||
f12745b6 DH |
3108 | /* The type dispatch code is duplicated below |
3109 | * (c.f. objects.c:scm_mcache_compute_cmethod) since that | |
3110 | * cuts down execution time for type dispatch to 50%. */ | |
dff98306 | 3111 | type_dispatch: /* inputs: x, arg1 */ |
f12745b6 DH |
3112 | /* Type dispatch means to determine from the types of the function |
3113 | * arguments (i. e. the 'signature' of the call), which method from | |
3114 | * a generic function is to be called. This process of selecting | |
3115 | * the right method takes some time. To speed it up, guile uses | |
3116 | * caching: Together with the macro call to dispatch the signatures | |
3117 | * of some previous calls to that generic function from the same | |
3118 | * place are stored (in the code!) in a cache that we call the | |
3119 | * 'method cache'. This is done since it is likely, that | |
3120 | * consecutive calls to dispatch from that position in the code will | |
3121 | * have the same signature. Thus, the type dispatch works as | |
3122 | * follows: First, determine a hash value from the signature of the | |
3123 | * actual arguments. Second, use this hash value as an index to | |
3124 | * find that same signature in the method cache stored at this | |
3125 | * position in the code. If found, you have also found the | |
3126 | * corresponding method that belongs to that signature. If the | |
3127 | * signature is not found in the method cache, you have to perform a | |
3128 | * full search over all signatures stored with the generic | |
3129 | * function. */ | |
3130 | { | |
3131 | unsigned long int specializers; | |
3132 | unsigned long int hash_value; | |
3133 | unsigned long int cache_end_pos; | |
3134 | unsigned long int mask; | |
3135 | SCM method_cache; | |
3136 | ||
3137 | { | |
3138 | SCM z = SCM_CDDR (x); | |
3139 | SCM tmp = SCM_CADR (z); | |
3140 | specializers = SCM_INUM (SCM_CAR (z)); | |
3141 | ||
3142 | /* Compute a hash value for searching the method cache. There | |
3143 | * are two variants for computing the hash value, a (rather) | |
3144 | * complicated one, and a simple one. For the complicated one | |
3145 | * explained below, tmp holds a number that is used in the | |
3146 | * computation. */ | |
3147 | if (SCM_INUMP (tmp)) | |
3148 | { | |
3149 | /* Use the signature of the actual arguments to determine | |
3150 | * the hash value. This is done as follows: Each class has | |
3151 | * an array of random numbers, that are determined when the | |
3152 | * class is created. The integer 'hashset' is an index into | |
3153 | * that array of random numbers. Now, from all classes that | |
3154 | * are part of the signature of the actual arguments, the | |
3155 | * random numbers at index 'hashset' are taken and summed | |
3156 | * up, giving the hash value. The value of 'hashset' is | |
3157 | * stored at the call to dispatch. This allows to have | |
3158 | * different 'formulas' for calculating the hash value at | |
3159 | * different places where dispatch is called. This allows | |
3160 | * to optimize the hash formula at every individual place | |
3161 | * where dispatch is called, such that hopefully the hash | |
3162 | * value that is computed will directly point to the right | |
3163 | * method in the method cache. */ | |
3164 | unsigned long int hashset = SCM_INUM (tmp); | |
3165 | unsigned long int counter = specializers + 1; | |
dff98306 | 3166 | SCM tmp_arg = arg1; |
f12745b6 DH |
3167 | hash_value = 0; |
3168 | while (!SCM_NULLP (tmp_arg) && counter != 0) | |
61364ba6 | 3169 | { |
f12745b6 DH |
3170 | SCM class = scm_class_of (SCM_CAR (tmp_arg)); |
3171 | hash_value += SCM_INSTANCE_HASH (class, hashset); | |
3172 | tmp_arg = SCM_CDR (tmp_arg); | |
3173 | counter--; | |
61364ba6 | 3174 | } |
f12745b6 DH |
3175 | z = SCM_CDDR (z); |
3176 | method_cache = SCM_CADR (z); | |
3177 | mask = SCM_INUM (SCM_CAR (z)); | |
3178 | hash_value &= mask; | |
3179 | cache_end_pos = hash_value; | |
3180 | } | |
3181 | else | |
3182 | { | |
3183 | /* This method of determining the hash value is much | |
3184 | * simpler: Set the hash value to zero and just perform a | |
3185 | * linear search through the method cache. */ | |
3186 | method_cache = tmp; | |
3187 | mask = (unsigned long int) ((long) -1); | |
3188 | hash_value = 0; | |
3189 | cache_end_pos = SCM_VECTOR_LENGTH (method_cache); | |
3190 | } | |
3191 | } | |
61364ba6 | 3192 | |
f12745b6 DH |
3193 | { |
3194 | /* Search the method cache for a method with a matching | |
3195 | * signature. Start the search at position 'hash_value'. The | |
3196 | * hashing implementation uses linear probing for conflict | |
3197 | * resolution, that is, if the signature in question is not | |
3198 | * found at the starting index in the hash table, the next table | |
3199 | * entry is tried, and so on, until in the worst case the whole | |
3200 | * cache has been searched, but still the signature has not been | |
3201 | * found. */ | |
3202 | SCM z; | |
3203 | do | |
3204 | { | |
dff98306 | 3205 | SCM args = arg1; /* list of arguments */ |
f12745b6 DH |
3206 | z = SCM_VELTS (method_cache)[hash_value]; |
3207 | while (!SCM_NULLP (args)) | |
61364ba6 MD |
3208 | { |
3209 | /* More arguments than specifiers => CLASS != ENV */ | |
f12745b6 DH |
3210 | SCM class_of_arg = scm_class_of (SCM_CAR (args)); |
3211 | if (!SCM_EQ_P (class_of_arg, SCM_CAR (z))) | |
61364ba6 | 3212 | goto next_method; |
f12745b6 | 3213 | args = SCM_CDR (args); |
61364ba6 MD |
3214 | z = SCM_CDR (z); |
3215 | } | |
f12745b6 DH |
3216 | /* Fewer arguments than specifiers => CAR != ENV */ |
3217 | if (SCM_NULLP (SCM_CAR (z)) || SCM_CONSP (SCM_CAR (z))) | |
3218 | goto apply_cmethod; | |
3219 | next_method: | |
3220 | hash_value = (hash_value + 1) & mask; | |
3221 | } while (hash_value != cache_end_pos); | |
3222 | ||
3223 | /* No appropriate method was found in the cache. */ | |
dff98306 | 3224 | z = scm_memoize_method (x, arg1); |
f12745b6 | 3225 | |
dff98306 | 3226 | apply_cmethod: /* inputs: z, arg1 */ |
f12745b6 DH |
3227 | { |
3228 | SCM formals = SCM_CMETHOD_FORMALS (z); | |
821f18a4 | 3229 | env = SCM_EXTEND_ENV (formals, arg1, SCM_CMETHOD_ENV (z)); |
f12745b6 DH |
3230 | x = SCM_CMETHOD_BODY (z); |
3231 | goto nontoplevel_begin; | |
3232 | } | |
3233 | } | |
61364ba6 | 3234 | } |
73b64342 | 3235 | |
1d15ecd3 | 3236 | |
ca4be6ea MD |
3237 | case (SCM_ISYMNUM (SCM_IM_SLOT_REF)): |
3238 | x = SCM_CDR (x); | |
1d15ecd3 DH |
3239 | { |
3240 | SCM instance = EVALCAR (x, env); | |
3241 | unsigned long int slot = SCM_INUM (SCM_CADR (x)); | |
3242 | RETURN (SCM_PACK (SCM_STRUCT_DATA (instance) [slot])); | |
3243 | } | |
3244 | ||
3245 | ||
ca4be6ea MD |
3246 | case (SCM_ISYMNUM (SCM_IM_SLOT_SET_X)): |
3247 | x = SCM_CDR (x); | |
1d15ecd3 DH |
3248 | { |
3249 | SCM instance = EVALCAR (x, env); | |
3250 | unsigned long int slot = SCM_INUM (SCM_CADR (x)); | |
3251 | SCM value = EVALCAR (SCM_CDDR (x), env); | |
3252 | SCM_STRUCT_DATA (instance) [slot] = SCM_UNPACK (value); | |
3253 | RETURN (SCM_UNSPECIFIED); | |
3254 | } | |
3255 | ||
c96d76b8 | 3256 | |
22721140 | 3257 | #if SCM_ENABLE_ELISP |
ca4be6ea | 3258 | |
73b64342 | 3259 | case (SCM_ISYMNUM (SCM_IM_NIL_COND)): |
1d15ecd3 DH |
3260 | { |
3261 | SCM test_form = SCM_CDR (x); | |
3262 | x = SCM_CDR (test_form); | |
3263 | while (!SCM_NULL_OR_NIL_P (x)) | |
3264 | { | |
3265 | SCM test_result = EVALCAR (test_form, env); | |
3266 | if (!(SCM_FALSEP (test_result) | |
3267 | || SCM_NULL_OR_NIL_P (test_result))) | |
3268 | { | |
3269 | if (SCM_EQ_P (SCM_CAR (x), SCM_UNSPECIFIED)) | |
3270 | RETURN (test_result); | |
3271 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
3272 | goto carloop; | |
3273 | } | |
3274 | else | |
3275 | { | |
3276 | test_form = SCM_CDR (x); | |
3277 | x = SCM_CDR (test_form); | |
3278 | } | |
3279 | } | |
3280 | x = test_form; | |
3281 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
3282 | goto carloop; | |
3283 | } | |
73b64342 | 3284 | |
c96d76b8 | 3285 | #endif /* SCM_ENABLE_ELISP */ |
73b64342 MD |
3286 | |
3287 | case (SCM_ISYMNUM (SCM_IM_BIND)): | |
2e171178 MV |
3288 | { |
3289 | SCM vars, exps, vals; | |
73b64342 | 3290 | |
2e171178 MV |
3291 | x = SCM_CDR (x); |
3292 | vars = SCM_CAAR (x); | |
3293 | exps = SCM_CDAR (x); | |
2e171178 | 3294 | vals = SCM_EOL; |
82b3e2c6 | 3295 | while (!SCM_NULLP (exps)) |
2e171178 MV |
3296 | { |
3297 | vals = scm_cons (EVALCAR (exps, env), vals); | |
3298 | exps = SCM_CDR (exps); | |
3299 | } | |
3300 | ||
3301 | scm_swap_bindings (vars, vals); | |
3302 | scm_dynwinds = scm_acons (vars, vals, scm_dynwinds); | |
1d15ecd3 DH |
3303 | |
3304 | /* Ignore all but the last evaluation result. */ | |
3305 | for (x = SCM_CDR (x); !SCM_NULLP (SCM_CDR (x)); x = SCM_CDR (x)) | |
2e171178 | 3306 | { |
1d15ecd3 DH |
3307 | if (SCM_CONSP (SCM_CAR (x))) |
3308 | SCM_CEVAL (SCM_CAR (x), env); | |
2e171178 MV |
3309 | } |
3310 | proc = EVALCAR (x, env); | |
73b64342 | 3311 | |
2e171178 MV |
3312 | scm_dynwinds = SCM_CDR (scm_dynwinds); |
3313 | scm_swap_bindings (vars, vals); | |
73b64342 | 3314 | |
ddea3325 | 3315 | RETURN (proc); |
2e171178 | 3316 | } |
c96d76b8 | 3317 | |
1d15ecd3 | 3318 | |
a513ead3 MV |
3319 | case (SCM_ISYMNUM (SCM_IM_CALL_WITH_VALUES)): |
3320 | { | |
9a069bdd DH |
3321 | SCM producer; |
3322 | ||
3323 | x = SCM_CDR (x); | |
3324 | producer = EVALCAR (x, env); | |
3325 | x = SCM_CDR (x); | |
3326 | proc = EVALCAR (x, env); /* proc is the consumer. */ | |
3327 | arg1 = SCM_APPLY (producer, SCM_EOL, SCM_EOL); | |
dff98306 | 3328 | if (SCM_VALUESP (arg1)) |
82b3e2c6 DH |
3329 | { |
3330 | /* The list of arguments is not copied. Rather, it is assumed | |
3331 | * that this has been done by the 'values' procedure. */ | |
3332 | arg1 = scm_struct_ref (arg1, SCM_INUM0); | |
3333 | } | |
a513ead3 | 3334 | else |
82b3e2c6 DH |
3335 | { |
3336 | arg1 = scm_list_1 (arg1); | |
3337 | } | |
9a069bdd DH |
3338 | PREP_APPLY (proc, arg1); |
3339 | goto apply_proc; | |
a513ead3 MV |
3340 | } |
3341 | ||
b7798e10 | 3342 | |
0f2d19dd | 3343 | default: |
ddd8f927 | 3344 | goto evapply; |
0f2d19dd JB |
3345 | } |
3346 | ||
89bff2fc | 3347 | |
0f2d19dd JB |
3348 | default: |
3349 | proc = x; | |
ddd8f927 | 3350 | goto evapply; |
82b3e2c6 | 3351 | |
89bff2fc | 3352 | |
0f2d19dd JB |
3353 | case scm_tc7_vector: |
3354 | case scm_tc7_wvect: | |
22721140 | 3355 | #if SCM_HAVE_ARRAYS |
0f2d19dd JB |
3356 | case scm_tc7_bvect: |
3357 | case scm_tc7_byvect: | |
3358 | case scm_tc7_svect: | |
3359 | case scm_tc7_ivect: | |
3360 | case scm_tc7_uvect: | |
3361 | case scm_tc7_fvect: | |
3362 | case scm_tc7_dvect: | |
3363 | case scm_tc7_cvect: | |
3d05f2e0 | 3364 | #if SCM_SIZEOF_LONG_LONG != 0 |
0f2d19dd | 3365 | case scm_tc7_llvect: |
afe5177e | 3366 | #endif |
0f2d19dd | 3367 | #endif |
534c55a9 | 3368 | case scm_tc7_number: |
0f2d19dd | 3369 | case scm_tc7_string: |
0f2d19dd JB |
3370 | case scm_tc7_smob: |
3371 | case scm_tcs_closures: | |
224822be | 3372 | case scm_tc7_cclo: |
89efbff4 | 3373 | case scm_tc7_pws: |
0f2d19dd | 3374 | case scm_tcs_subrs: |
904a077d | 3375 | case scm_tcs_struct: |
0f2d19dd JB |
3376 | RETURN (x); |
3377 | ||
89bff2fc DH |
3378 | case scm_tc7_symbol: |
3379 | /* Only happens when called at top level. */ | |
3380 | x = scm_cons (x, SCM_UNDEFINED); | |
3381 | RETURN (*scm_lookupcar (x, env, 1)); | |
3382 | ||
d22a0ea1 | 3383 | case scm_tc7_variable: |
a130e982 | 3384 | RETURN (SCM_VARIABLE_REF(x)); |
d22a0ea1 | 3385 | |
1b43d24c | 3386 | case SCM_BIT7 (SCM_ILOC00): |
0f2d19dd | 3387 | proc = *scm_ilookup (SCM_CAR (x), env); |
ddd8f927 | 3388 | goto checkmacro; |
b7798e10 | 3389 | |
0f2d19dd | 3390 | case scm_tcs_cons_nimcar: |
e050d4f8 | 3391 | if (SCM_SYMBOLP (SCM_CAR (x))) |
0f2d19dd | 3392 | { |
e050d4f8 | 3393 | SCM orig_sym = SCM_CAR (x); |
b7798e10 DH |
3394 | { |
3395 | SCM *location = scm_lookupcar1 (x, env, 1); | |
3396 | if (location == NULL) | |
3397 | { | |
3398 | /* we have lost the race, start again. */ | |
3399 | goto dispatch; | |
3400 | } | |
3401 | proc = *location; | |
3402 | } | |
f8769b1d | 3403 | |
22a52da1 | 3404 | if (SCM_MACROP (proc)) |
0f2d19dd | 3405 | { |
86d31dfe MV |
3406 | SCM_SETCAR (x, orig_sym); /* Undo memoizing effect of |
3407 | lookupcar */ | |
e050d4f8 | 3408 | handle_a_macro: /* inputs: x, env, proc */ |
368bf056 | 3409 | #ifdef DEVAL |
7c354052 MD |
3410 | /* Set a flag during macro expansion so that macro |
3411 | application frames can be deleted from the backtrace. */ | |
3412 | SCM_SET_MACROEXP (debug); | |
368bf056 | 3413 | #endif |
dff98306 | 3414 | arg1 = SCM_APPLY (SCM_MACRO_CODE (proc), x, |
f8769b1d MV |
3415 | scm_cons (env, scm_listofnull)); |
3416 | ||
7c354052 MD |
3417 | #ifdef DEVAL |
3418 | SCM_CLEAR_MACROEXP (debug); | |
3419 | #endif | |
22a52da1 | 3420 | switch (SCM_MACRO_TYPE (proc)) |
0f2d19dd | 3421 | { |
3b88ed2a | 3422 | case 3: |
0f2d19dd | 3423 | case 2: |
dff98306 DH |
3424 | if (scm_ilength (arg1) <= 0) |
3425 | arg1 = scm_list_2 (SCM_IM_BEGIN, arg1); | |
6dbd0af5 | 3426 | #ifdef DEVAL |
22a52da1 | 3427 | if (!SCM_CLOSUREP (SCM_MACRO_CODE (proc))) |
6dbd0af5 | 3428 | { |
6dbd0af5 | 3429 | SCM_DEFER_INTS; |
dff98306 DH |
3430 | SCM_SETCAR (x, SCM_CAR (arg1)); |
3431 | SCM_SETCDR (x, SCM_CDR (arg1)); | |
6dbd0af5 MD |
3432 | SCM_ALLOW_INTS; |
3433 | goto dispatch; | |
3434 | } | |
3435 | /* Prevent memoizing of debug info expression. */ | |
6203706f MD |
3436 | debug.info->e.exp = scm_cons_source (debug.info->e.exp, |
3437 | SCM_CAR (x), | |
3438 | SCM_CDR (x)); | |
6dbd0af5 | 3439 | #endif |
0f2d19dd | 3440 | SCM_DEFER_INTS; |
dff98306 DH |
3441 | SCM_SETCAR (x, SCM_CAR (arg1)); |
3442 | SCM_SETCDR (x, SCM_CDR (arg1)); | |
0f2d19dd | 3443 | SCM_ALLOW_INTS; |
680516ba DH |
3444 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); |
3445 | goto loop; | |
3063e30a | 3446 | #if SCM_ENABLE_DEPRECATED == 1 |
0f2d19dd | 3447 | case 1: |
680516ba DH |
3448 | x = arg1; |
3449 | if (SCM_NIMP (x)) | |
3450 | { | |
3451 | PREP_APPLY (SCM_UNDEFINED, SCM_EOL); | |
3452 | goto loop; | |
3453 | } | |
3454 | else | |
3455 | RETURN (arg1); | |
3063e30a | 3456 | #endif |
0f2d19dd | 3457 | case 0: |
dff98306 | 3458 | RETURN (arg1); |
0f2d19dd JB |
3459 | } |
3460 | } | |
3461 | } | |
3462 | else | |
3463 | proc = SCM_CEVAL (SCM_CAR (x), env); | |
bd987b8e | 3464 | |
ddd8f927 DH |
3465 | checkmacro: |
3466 | if (SCM_MACROP (proc)) | |
0f2d19dd | 3467 | goto handle_a_macro; |
0f2d19dd JB |
3468 | } |
3469 | ||
3470 | ||
e050d4f8 | 3471 | evapply: /* inputs: x, proc */ |
6dbd0af5 MD |
3472 | PREP_APPLY (proc, SCM_EOL); |
3473 | if (SCM_NULLP (SCM_CDR (x))) { | |
3474 | ENTER_APPLY; | |
89efbff4 | 3475 | evap0: |
ddd8f927 | 3476 | SCM_ASRTGO (!SCM_IMP (proc), badfun); |
0f2d19dd JB |
3477 | switch (SCM_TYP7 (proc)) |
3478 | { /* no arguments given */ | |
3479 | case scm_tc7_subr_0: | |
3480 | RETURN (SCM_SUBRF (proc) ()); | |
3481 | case scm_tc7_subr_1o: | |
3482 | RETURN (SCM_SUBRF (proc) (SCM_UNDEFINED)); | |
3483 | case scm_tc7_lsubr: | |
3484 | RETURN (SCM_SUBRF (proc) (SCM_EOL)); | |
3485 | case scm_tc7_rpsubr: | |
3486 | RETURN (SCM_BOOL_T); | |
3487 | case scm_tc7_asubr: | |
3488 | RETURN (SCM_SUBRF (proc) (SCM_UNDEFINED, SCM_UNDEFINED)); | |
0717dfd8 | 3489 | case scm_tc7_smob: |
68b06924 | 3490 | if (!SCM_SMOB_APPLICABLE_P (proc)) |
0717dfd8 | 3491 | goto badfun; |
68b06924 | 3492 | RETURN (SCM_SMOB_APPLY_0 (proc)); |
0f2d19dd | 3493 | case scm_tc7_cclo: |
dff98306 | 3494 | arg1 = proc; |
0f2d19dd | 3495 | proc = SCM_CCLO_SUBR (proc); |
6dbd0af5 MD |
3496 | #ifdef DEVAL |
3497 | debug.info->a.proc = proc; | |
dff98306 | 3498 | debug.info->a.args = scm_list_1 (arg1); |
6dbd0af5 | 3499 | #endif |
0f2d19dd | 3500 | goto evap1; |
89efbff4 MD |
3501 | case scm_tc7_pws: |
3502 | proc = SCM_PROCEDURE (proc); | |
3503 | #ifdef DEVAL | |
3504 | debug.info->a.proc = proc; | |
3505 | #endif | |
002f1a5d MD |
3506 | if (!SCM_CLOSUREP (proc)) |
3507 | goto evap0; | |
ddd8f927 | 3508 | /* fallthrough */ |
0f2d19dd | 3509 | case scm_tcs_closures: |
ddd8f927 DH |
3510 | { |
3511 | const SCM formals = SCM_CLOSURE_FORMALS (proc); | |
3512 | if (SCM_CONSP (formals)) | |
3513 | goto umwrongnumargs; | |
3514 | x = SCM_CLOSURE_BODY (proc); | |
3515 | env = SCM_EXTEND_ENV (formals, SCM_EOL, SCM_ENV (proc)); | |
3516 | goto nontoplevel_begin; | |
3517 | } | |
904a077d | 3518 | case scm_tcs_struct: |
195847fa MD |
3519 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) |
3520 | { | |
3521 | x = SCM_ENTITY_PROCEDURE (proc); | |
dff98306 | 3522 | arg1 = SCM_EOL; |
195847fa MD |
3523 | goto type_dispatch; |
3524 | } | |
2ca0d207 | 3525 | else if (SCM_I_OPERATORP (proc)) |
da7f71d7 | 3526 | { |
dff98306 | 3527 | arg1 = proc; |
195847fa MD |
3528 | proc = (SCM_I_ENTITYP (proc) |
3529 | ? SCM_ENTITY_PROCEDURE (proc) | |
3530 | : SCM_OPERATOR_PROCEDURE (proc)); | |
da7f71d7 | 3531 | #ifdef DEVAL |
195847fa | 3532 | debug.info->a.proc = proc; |
dff98306 | 3533 | debug.info->a.args = scm_list_1 (arg1); |
da7f71d7 | 3534 | #endif |
ddd8f927 | 3535 | goto evap1; |
da7f71d7 | 3536 | } |
2ca0d207 DH |
3537 | else |
3538 | goto badfun; | |
0f2d19dd JB |
3539 | case scm_tc7_subr_1: |
3540 | case scm_tc7_subr_2: | |
3541 | case scm_tc7_subr_2o: | |
14b18ed6 | 3542 | case scm_tc7_dsubr: |
0f2d19dd JB |
3543 | case scm_tc7_cxr: |
3544 | case scm_tc7_subr_3: | |
3545 | case scm_tc7_lsubr_2: | |
3546 | umwrongnumargs: | |
3547 | unmemocar (x, env); | |
f5bf2977 | 3548 | scm_wrong_num_args (proc); |
0f2d19dd | 3549 | default: |
ddd8f927 DH |
3550 | badfun: |
3551 | scm_misc_error (NULL, "Wrong type to apply: ~S", scm_list_1 (proc)); | |
0f2d19dd | 3552 | } |
6dbd0af5 | 3553 | } |
0f2d19dd JB |
3554 | |
3555 | /* must handle macros by here */ | |
3556 | x = SCM_CDR (x); | |
dff98306 DH |
3557 | if (SCM_CONSP (x)) |
3558 | arg1 = EVALCAR (x, env); | |
680ed4a8 | 3559 | else |
ab1f1094 | 3560 | scm_wrong_num_args (proc); |
6dbd0af5 | 3561 | #ifdef DEVAL |
dff98306 | 3562 | debug.info->a.args = scm_list_1 (arg1); |
6dbd0af5 | 3563 | #endif |
0f2d19dd | 3564 | x = SCM_CDR (x); |
42030fb2 DH |
3565 | { |
3566 | SCM arg2; | |
3567 | if (SCM_NULLP (x)) | |
3568 | { | |
3569 | ENTER_APPLY; | |
3570 | evap1: /* inputs: proc, arg1 */ | |
ddd8f927 | 3571 | SCM_ASRTGO (!SCM_IMP (proc), badfun); |
42030fb2 DH |
3572 | switch (SCM_TYP7 (proc)) |
3573 | { /* have one argument in arg1 */ | |
3574 | case scm_tc7_subr_2o: | |
3575 | RETURN (SCM_SUBRF (proc) (arg1, SCM_UNDEFINED)); | |
3576 | case scm_tc7_subr_1: | |
3577 | case scm_tc7_subr_1o: | |
3578 | RETURN (SCM_SUBRF (proc) (arg1)); | |
14b18ed6 DH |
3579 | case scm_tc7_dsubr: |
3580 | if (SCM_INUMP (arg1)) | |
3581 | { | |
3582 | RETURN (scm_make_real (SCM_DSUBRF (proc) ((double) SCM_INUM (arg1)))); | |
3583 | } | |
3584 | else if (SCM_REALP (arg1)) | |
3585 | { | |
3586 | RETURN (scm_make_real (SCM_DSUBRF (proc) (SCM_REAL_VALUE (arg1)))); | |
3587 | } | |
3588 | else if (SCM_BIGP (arg1)) | |
3589 | { | |
3590 | RETURN (scm_make_real (SCM_DSUBRF (proc) (scm_i_big2dbl (arg1)))); | |
3591 | } | |
3592 | SCM_WTA_DISPATCH_1 (*SCM_SUBR_GENERIC (proc), arg1, | |
3593 | SCM_ARG1, SCM_SYMBOL_CHARS (SCM_SNAME (proc))); | |
42030fb2 | 3594 | case scm_tc7_cxr: |
42030fb2 | 3595 | { |
14b18ed6 DH |
3596 | unsigned char pattern = (scm_t_bits) SCM_SUBRF (proc); |
3597 | do | |
3598 | { | |
3599 | SCM_ASSERT (SCM_CONSP (arg1), arg1, SCM_ARG1, | |
3600 | SCM_SYMBOL_CHARS (SCM_SNAME (proc))); | |
3601 | arg1 = (pattern & 1) ? SCM_CAR (arg1) : SCM_CDR (arg1); | |
3602 | pattern >>= 2; | |
3603 | } while (pattern); | |
42030fb2 | 3604 | RETURN (arg1); |
0f2d19dd | 3605 | } |
42030fb2 DH |
3606 | case scm_tc7_rpsubr: |
3607 | RETURN (SCM_BOOL_T); | |
3608 | case scm_tc7_asubr: | |
3609 | RETURN (SCM_SUBRF (proc) (arg1, SCM_UNDEFINED)); | |
3610 | case scm_tc7_lsubr: | |
0f2d19dd | 3611 | #ifdef DEVAL |
42030fb2 | 3612 | RETURN (SCM_SUBRF (proc) (debug.info->a.args)); |
0f2d19dd | 3613 | #else |
42030fb2 | 3614 | RETURN (SCM_SUBRF (proc) (scm_list_1 (arg1))); |
0f2d19dd | 3615 | #endif |
42030fb2 DH |
3616 | case scm_tc7_smob: |
3617 | if (!SCM_SMOB_APPLICABLE_P (proc)) | |
3618 | goto badfun; | |
3619 | RETURN (SCM_SMOB_APPLY_1 (proc, arg1)); | |
3620 | case scm_tc7_cclo: | |
3621 | arg2 = arg1; | |
3622 | arg1 = proc; | |
3623 | proc = SCM_CCLO_SUBR (proc); | |
6dbd0af5 | 3624 | #ifdef DEVAL |
42030fb2 DH |
3625 | debug.info->a.args = scm_cons (arg1, debug.info->a.args); |
3626 | debug.info->a.proc = proc; | |
6dbd0af5 | 3627 | #endif |
42030fb2 DH |
3628 | goto evap2; |
3629 | case scm_tc7_pws: | |
3630 | proc = SCM_PROCEDURE (proc); | |
89efbff4 | 3631 | #ifdef DEVAL |
42030fb2 | 3632 | debug.info->a.proc = proc; |
89efbff4 | 3633 | #endif |
42030fb2 DH |
3634 | if (!SCM_CLOSUREP (proc)) |
3635 | goto evap1; | |
ddd8f927 | 3636 | /* fallthrough */ |
42030fb2 | 3637 | case scm_tcs_closures: |
ddd8f927 DH |
3638 | { |
3639 | /* clos1: */ | |
3640 | const SCM formals = SCM_CLOSURE_FORMALS (proc); | |
3641 | if (SCM_NULLP (formals) | |
3642 | || (SCM_CONSP (formals) && SCM_CONSP (SCM_CDR (formals)))) | |
3643 | goto umwrongnumargs; | |
3644 | x = SCM_CLOSURE_BODY (proc); | |
0f2d19dd | 3645 | #ifdef DEVAL |
ddd8f927 DH |
3646 | env = SCM_EXTEND_ENV (formals, |
3647 | debug.info->a.args, | |
3648 | SCM_ENV (proc)); | |
0f2d19dd | 3649 | #else |
ddd8f927 DH |
3650 | env = SCM_EXTEND_ENV (formals, |
3651 | scm_list_1 (arg1), | |
3652 | SCM_ENV (proc)); | |
0f2d19dd | 3653 | #endif |
ddd8f927 DH |
3654 | goto nontoplevel_begin; |
3655 | } | |
42030fb2 DH |
3656 | case scm_tcs_struct: |
3657 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) | |
3658 | { | |
3659 | x = SCM_ENTITY_PROCEDURE (proc); | |
f3d2630a | 3660 | #ifdef DEVAL |
42030fb2 | 3661 | arg1 = debug.info->a.args; |
f3d2630a | 3662 | #else |
42030fb2 | 3663 | arg1 = scm_list_1 (arg1); |
f3d2630a | 3664 | #endif |
42030fb2 DH |
3665 | goto type_dispatch; |
3666 | } | |
2ca0d207 | 3667 | else if (SCM_I_OPERATORP (proc)) |
42030fb2 DH |
3668 | { |
3669 | arg2 = arg1; | |
3670 | arg1 = proc; | |
3671 | proc = (SCM_I_ENTITYP (proc) | |
3672 | ? SCM_ENTITY_PROCEDURE (proc) | |
3673 | : SCM_OPERATOR_PROCEDURE (proc)); | |
0c32d76c | 3674 | #ifdef DEVAL |
42030fb2 DH |
3675 | debug.info->a.args = scm_cons (arg1, debug.info->a.args); |
3676 | debug.info->a.proc = proc; | |
0c32d76c | 3677 | #endif |
ddd8f927 | 3678 | goto evap2; |
42030fb2 | 3679 | } |
2ca0d207 DH |
3680 | else |
3681 | goto badfun; | |
42030fb2 DH |
3682 | case scm_tc7_subr_2: |
3683 | case scm_tc7_subr_0: | |
3684 | case scm_tc7_subr_3: | |
3685 | case scm_tc7_lsubr_2: | |
ab1f1094 | 3686 | scm_wrong_num_args (proc); |
42030fb2 DH |
3687 | default: |
3688 | goto badfun; | |
3689 | } | |
3690 | } | |
42030fb2 DH |
3691 | if (SCM_CONSP (x)) |
3692 | arg2 = EVALCAR (x, env); | |
3693 | else | |
ab1f1094 | 3694 | scm_wrong_num_args (proc); |
bd987b8e | 3695 | |
42030fb2 | 3696 | { /* have two or more arguments */ |
6dbd0af5 | 3697 | #ifdef DEVAL |
42030fb2 | 3698 | debug.info->a.args = scm_list_2 (arg1, arg2); |
6dbd0af5 | 3699 | #endif |
42030fb2 DH |
3700 | x = SCM_CDR (x); |
3701 | if (SCM_NULLP (x)) { | |
3702 | ENTER_APPLY; | |
3703 | evap2: | |
ddd8f927 | 3704 | SCM_ASRTGO (!SCM_IMP (proc), badfun); |
42030fb2 DH |
3705 | switch (SCM_TYP7 (proc)) |
3706 | { /* have two arguments */ | |
3707 | case scm_tc7_subr_2: | |
3708 | case scm_tc7_subr_2o: | |
3709 | RETURN (SCM_SUBRF (proc) (arg1, arg2)); | |
3710 | case scm_tc7_lsubr: | |
0f2d19dd | 3711 | #ifdef DEVAL |
42030fb2 | 3712 | RETURN (SCM_SUBRF (proc) (debug.info->a.args)); |
6dbd0af5 | 3713 | #else |
42030fb2 DH |
3714 | RETURN (SCM_SUBRF (proc) (scm_list_2 (arg1, arg2))); |
3715 | #endif | |
3716 | case scm_tc7_lsubr_2: | |
3717 | RETURN (SCM_SUBRF (proc) (arg1, arg2, SCM_EOL)); | |
3718 | case scm_tc7_rpsubr: | |
3719 | case scm_tc7_asubr: | |
3720 | RETURN (SCM_SUBRF (proc) (arg1, arg2)); | |
3721 | case scm_tc7_smob: | |
3722 | if (!SCM_SMOB_APPLICABLE_P (proc)) | |
3723 | goto badfun; | |
3724 | RETURN (SCM_SMOB_APPLY_2 (proc, arg1, arg2)); | |
3725 | cclon: | |
3726 | case scm_tc7_cclo: | |
0f2d19dd | 3727 | #ifdef DEVAL |
42030fb2 DH |
3728 | RETURN (SCM_APPLY (SCM_CCLO_SUBR (proc), |
3729 | scm_cons (proc, debug.info->a.args), | |
3730 | SCM_EOL)); | |
0f2d19dd | 3731 | #else |
42030fb2 DH |
3732 | RETURN (SCM_APPLY (SCM_CCLO_SUBR (proc), |
3733 | scm_cons2 (proc, arg1, | |
3734 | scm_cons (arg2, | |
3735 | scm_eval_args (x, | |
3736 | env, | |
3737 | proc))), | |
3738 | SCM_EOL)); | |
3739 | #endif | |
3740 | case scm_tcs_struct: | |
3741 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) | |
3742 | { | |
3743 | x = SCM_ENTITY_PROCEDURE (proc); | |
3744 | #ifdef DEVAL | |
3745 | arg1 = debug.info->a.args; | |
3746 | #else | |
3747 | arg1 = scm_list_2 (arg1, arg2); | |
6dbd0af5 | 3748 | #endif |
42030fb2 DH |
3749 | goto type_dispatch; |
3750 | } | |
2ca0d207 | 3751 | else if (SCM_I_OPERATORP (proc)) |
42030fb2 DH |
3752 | { |
3753 | operatorn: | |
f3d2630a | 3754 | #ifdef DEVAL |
42030fb2 DH |
3755 | RETURN (SCM_APPLY (SCM_I_ENTITYP (proc) |
3756 | ? SCM_ENTITY_PROCEDURE (proc) | |
3757 | : SCM_OPERATOR_PROCEDURE (proc), | |
3758 | scm_cons (proc, debug.info->a.args), | |
3759 | SCM_EOL)); | |
f3d2630a | 3760 | #else |
42030fb2 DH |
3761 | RETURN (SCM_APPLY (SCM_I_ENTITYP (proc) |
3762 | ? SCM_ENTITY_PROCEDURE (proc) | |
3763 | : SCM_OPERATOR_PROCEDURE (proc), | |
3764 | scm_cons2 (proc, arg1, | |
3765 | scm_cons (arg2, | |
3766 | scm_eval_args (x, | |
3767 | env, | |
3768 | proc))), | |
3769 | SCM_EOL)); | |
f3d2630a | 3770 | #endif |
42030fb2 | 3771 | } |
2ca0d207 DH |
3772 | else |
3773 | goto badfun; | |
42030fb2 | 3774 | case scm_tc7_subr_0: |
14b18ed6 | 3775 | case scm_tc7_dsubr: |
42030fb2 DH |
3776 | case scm_tc7_cxr: |
3777 | case scm_tc7_subr_1o: | |
3778 | case scm_tc7_subr_1: | |
3779 | case scm_tc7_subr_3: | |
ab1f1094 | 3780 | scm_wrong_num_args (proc); |
42030fb2 | 3781 | default: |
9b07e212 | 3782 | goto badfun; |
42030fb2 DH |
3783 | case scm_tc7_pws: |
3784 | proc = SCM_PROCEDURE (proc); | |
3785 | #ifdef DEVAL | |
3786 | debug.info->a.proc = proc; | |
3787 | #endif | |
3788 | if (!SCM_CLOSUREP (proc)) | |
3789 | goto evap2; | |
ddd8f927 | 3790 | /* fallthrough */ |
42030fb2 | 3791 | case scm_tcs_closures: |
ddd8f927 DH |
3792 | { |
3793 | /* clos2: */ | |
3794 | const SCM formals = SCM_CLOSURE_FORMALS (proc); | |
3795 | if (SCM_NULLP (formals) | |
3796 | || (SCM_CONSP (formals) | |
3797 | && (SCM_NULLP (SCM_CDR (formals)) | |
3798 | || (SCM_CONSP (SCM_CDR (formals)) | |
3799 | && SCM_CONSP (SCM_CDDR (formals)))))) | |
3800 | goto umwrongnumargs; | |
0c32d76c | 3801 | #ifdef DEVAL |
ddd8f927 DH |
3802 | env = SCM_EXTEND_ENV (formals, |
3803 | debug.info->a.args, | |
3804 | SCM_ENV (proc)); | |
195847fa | 3805 | #else |
ddd8f927 DH |
3806 | env = SCM_EXTEND_ENV (formals, |
3807 | scm_list_2 (arg1, arg2), | |
3808 | SCM_ENV (proc)); | |
195847fa | 3809 | #endif |
ddd8f927 DH |
3810 | x = SCM_CLOSURE_BODY (proc); |
3811 | goto nontoplevel_begin; | |
3812 | } | |
42030fb2 DH |
3813 | } |
3814 | } | |
42030fb2 | 3815 | if (!SCM_CONSP (x)) |
ab1f1094 | 3816 | scm_wrong_num_args (proc); |
42030fb2 DH |
3817 | #ifdef DEVAL |
3818 | debug.info->a.args = scm_cons2 (arg1, arg2, | |
3819 | deval_args (x, env, proc, | |
3820 | SCM_CDRLOC (SCM_CDR (debug.info->a.args)))); | |
3821 | #endif | |
3822 | ENTER_APPLY; | |
3823 | evap3: | |
ddd8f927 | 3824 | SCM_ASRTGO (!SCM_IMP (proc), badfun); |
42030fb2 DH |
3825 | switch (SCM_TYP7 (proc)) |
3826 | { /* have 3 or more arguments */ | |
3827 | #ifdef DEVAL | |
6dbd0af5 | 3828 | case scm_tc7_subr_3: |
ab1f1094 DH |
3829 | if (!SCM_NULLP (SCM_CDR (x))) |
3830 | scm_wrong_num_args (proc); | |
3831 | else | |
3832 | RETURN (SCM_SUBRF (proc) (arg1, arg2, | |
3833 | SCM_CADDR (debug.info->a.args))); | |
42030fb2 DH |
3834 | case scm_tc7_asubr: |
3835 | arg1 = SCM_SUBRF(proc)(arg1, arg2); | |
3836 | arg2 = SCM_CDDR (debug.info->a.args); | |
3837 | do | |
3838 | { | |
3839 | arg1 = SCM_SUBRF(proc)(arg1, SCM_CAR (arg2)); | |
3840 | arg2 = SCM_CDR (arg2); | |
3841 | } | |
3842 | while (SCM_NIMP (arg2)); | |
3843 | RETURN (arg1); | |
3844 | case scm_tc7_rpsubr: | |
3845 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg1, arg2))) | |
3846 | RETURN (SCM_BOOL_F); | |
3847 | arg1 = SCM_CDDR (debug.info->a.args); | |
3848 | do | |
3849 | { | |
3850 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg2, SCM_CAR (arg1)))) | |
3851 | RETURN (SCM_BOOL_F); | |
3852 | arg2 = SCM_CAR (arg1); | |
3853 | arg1 = SCM_CDR (arg1); | |
3854 | } | |
3855 | while (SCM_NIMP (arg1)); | |
3856 | RETURN (SCM_BOOL_T); | |
3857 | case scm_tc7_lsubr_2: | |
3858 | RETURN (SCM_SUBRF (proc) (arg1, arg2, | |
3859 | SCM_CDDR (debug.info->a.args))); | |
3860 | case scm_tc7_lsubr: | |
3861 | RETURN (SCM_SUBRF (proc) (debug.info->a.args)); | |
3862 | case scm_tc7_smob: | |
3863 | if (!SCM_SMOB_APPLICABLE_P (proc)) | |
3864 | goto badfun; | |
3865 | RETURN (SCM_SMOB_APPLY_3 (proc, arg1, arg2, | |
3866 | SCM_CDDR (debug.info->a.args))); | |
3867 | case scm_tc7_cclo: | |
3868 | goto cclon; | |
002f1a5d MD |
3869 | case scm_tc7_pws: |
3870 | proc = SCM_PROCEDURE (proc); | |
002f1a5d | 3871 | debug.info->a.proc = proc; |
002f1a5d | 3872 | if (!SCM_CLOSUREP (proc)) |
42030fb2 | 3873 | goto evap3; |
ddd8f927 | 3874 | /* fallthrough */ |
6dbd0af5 | 3875 | case scm_tcs_closures: |
ddd8f927 DH |
3876 | { |
3877 | const SCM formals = SCM_CLOSURE_FORMALS (proc); | |
3878 | if (SCM_NULLP (formals) | |
3879 | || (SCM_CONSP (formals) | |
3880 | && (SCM_NULLP (SCM_CDR (formals)) | |
3881 | || (SCM_CONSP (SCM_CDR (formals)) | |
3882 | && scm_badargsp (SCM_CDDR (formals), x))))) | |
3883 | goto umwrongnumargs; | |
3884 | SCM_SET_ARGSREADY (debug); | |
3885 | env = SCM_EXTEND_ENV (formals, | |
3886 | debug.info->a.args, | |
3887 | SCM_ENV (proc)); | |
3888 | x = SCM_CLOSURE_BODY (proc); | |
3889 | goto nontoplevel_begin; | |
3890 | } | |
6dbd0af5 | 3891 | #else /* DEVAL */ |
42030fb2 | 3892 | case scm_tc7_subr_3: |
ab1f1094 DH |
3893 | if (!SCM_NULLP (SCM_CDR (x))) |
3894 | scm_wrong_num_args (proc); | |
3895 | else | |
3896 | RETURN (SCM_SUBRF (proc) (arg1, arg2, EVALCAR (x, env))); | |
42030fb2 DH |
3897 | case scm_tc7_asubr: |
3898 | arg1 = SCM_SUBRF (proc) (arg1, arg2); | |
3899 | do | |
3900 | { | |
3901 | arg1 = SCM_SUBRF(proc)(arg1, EVALCAR(x, env)); | |
3902 | x = SCM_CDR(x); | |
3903 | } | |
3904 | while (SCM_NIMP (x)); | |
3905 | RETURN (arg1); | |
3906 | case scm_tc7_rpsubr: | |
3907 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg1, arg2))) | |
3908 | RETURN (SCM_BOOL_F); | |
3909 | do | |
3910 | { | |
3911 | arg1 = EVALCAR (x, env); | |
3912 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg2, arg1))) | |
3913 | RETURN (SCM_BOOL_F); | |
3914 | arg2 = arg1; | |
3915 | x = SCM_CDR (x); | |
3916 | } | |
3917 | while (SCM_NIMP (x)); | |
3918 | RETURN (SCM_BOOL_T); | |
3919 | case scm_tc7_lsubr_2: | |
3920 | RETURN (SCM_SUBRF (proc) (arg1, arg2, scm_eval_args (x, env, proc))); | |
3921 | case scm_tc7_lsubr: | |
3922 | RETURN (SCM_SUBRF (proc) (scm_cons2 (arg1, | |
3923 | arg2, | |
3924 | scm_eval_args (x, env, proc)))); | |
3925 | case scm_tc7_smob: | |
3926 | if (!SCM_SMOB_APPLICABLE_P (proc)) | |
3927 | goto badfun; | |
3928 | RETURN (SCM_SMOB_APPLY_3 (proc, arg1, arg2, | |
3929 | scm_eval_args (x, env, proc))); | |
3930 | case scm_tc7_cclo: | |
3931 | goto cclon; | |
3932 | case scm_tc7_pws: | |
3933 | proc = SCM_PROCEDURE (proc); | |
3934 | if (!SCM_CLOSUREP (proc)) | |
3935 | goto evap3; | |
ddd8f927 DH |
3936 | /* fallthrough */ |
3937 | case scm_tcs_closures: | |
da7f71d7 | 3938 | { |
ddd8f927 | 3939 | const SCM formals = SCM_CLOSURE_FORMALS (proc); |
42030fb2 DH |
3940 | if (SCM_NULLP (formals) |
3941 | || (SCM_CONSP (formals) | |
3942 | && (SCM_NULLP (SCM_CDR (formals)) | |
3943 | || (SCM_CONSP (SCM_CDR (formals)) | |
3944 | && scm_badargsp (SCM_CDDR (formals), x))))) | |
3945 | goto umwrongnumargs; | |
ddd8f927 DH |
3946 | env = SCM_EXTEND_ENV (formals, |
3947 | scm_cons2 (arg1, | |
3948 | arg2, | |
3949 | scm_eval_args (x, env, proc)), | |
3950 | SCM_ENV (proc)); | |
3951 | x = SCM_CLOSURE_BODY (proc); | |
3952 | goto nontoplevel_begin; | |
da7f71d7 | 3953 | } |
0f2d19dd | 3954 | #endif /* DEVAL */ |
42030fb2 DH |
3955 | case scm_tcs_struct: |
3956 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) | |
3957 | { | |
f3d2630a | 3958 | #ifdef DEVAL |
42030fb2 | 3959 | arg1 = debug.info->a.args; |
f3d2630a | 3960 | #else |
42030fb2 | 3961 | arg1 = scm_cons2 (arg1, arg2, scm_eval_args (x, env, proc)); |
f3d2630a | 3962 | #endif |
42030fb2 DH |
3963 | x = SCM_ENTITY_PROCEDURE (proc); |
3964 | goto type_dispatch; | |
3965 | } | |
2ca0d207 | 3966 | else if (SCM_I_OPERATORP (proc)) |
42030fb2 | 3967 | goto operatorn; |
2ca0d207 DH |
3968 | else |
3969 | goto badfun; | |
42030fb2 DH |
3970 | case scm_tc7_subr_2: |
3971 | case scm_tc7_subr_1o: | |
3972 | case scm_tc7_subr_2o: | |
3973 | case scm_tc7_subr_0: | |
14b18ed6 | 3974 | case scm_tc7_dsubr: |
42030fb2 DH |
3975 | case scm_tc7_cxr: |
3976 | case scm_tc7_subr_1: | |
ab1f1094 | 3977 | scm_wrong_num_args (proc); |
42030fb2 | 3978 | default: |
9b07e212 | 3979 | goto badfun; |
42030fb2 DH |
3980 | } |
3981 | } | |
0f2d19dd JB |
3982 | } |
3983 | #ifdef DEVAL | |
6dbd0af5 | 3984 | exit: |
5132eef0 | 3985 | if (scm_check_exit_p && SCM_TRAPS_P) |
b7ff98dd | 3986 | if (SCM_EXIT_FRAME_P || (SCM_TRACE_P && SCM_TRACED_FRAME_P (debug))) |
6dbd0af5 | 3987 | { |
b7ff98dd MD |
3988 | SCM_CLEAR_TRACED_FRAME (debug); |
3989 | if (SCM_CHEAPTRAPS_P) | |
dff98306 | 3990 | arg1 = scm_make_debugobj (&debug); |
6dbd0af5 MD |
3991 | else |
3992 | { | |
5f144b10 GH |
3993 | int first; |
3994 | SCM val = scm_make_continuation (&first); | |
e050d4f8 | 3995 | |
5f144b10 | 3996 | if (first) |
dff98306 | 3997 | arg1 = val; |
5f144b10 | 3998 | else |
6dbd0af5 | 3999 | { |
5f144b10 | 4000 | proc = val; |
6dbd0af5 MD |
4001 | goto ret; |
4002 | } | |
4003 | } | |
d95c0b76 | 4004 | SCM_TRAPS_P = 0; |
dff98306 | 4005 | scm_call_3 (SCM_EXIT_FRAME_HDLR, scm_sym_exit_frame, arg1, proc); |
d95c0b76 | 4006 | SCM_TRAPS_P = 1; |
6dbd0af5 MD |
4007 | } |
4008 | ret: | |
1646d37b | 4009 | scm_last_debug_frame = debug.prev; |
0f2d19dd JB |
4010 | return proc; |
4011 | #endif | |
4012 | } | |
4013 | ||
6dbd0af5 MD |
4014 | |
4015 | /* SECTION: This code is compiled once. | |
4016 | */ | |
4017 | ||
0f2d19dd JB |
4018 | #ifndef DEVAL |
4019 | ||
fdc28395 | 4020 | \f |
d0b07b5d | 4021 | |
fdc28395 KN |
4022 | /* Simple procedure calls |
4023 | */ | |
4024 | ||
4025 | SCM | |
4026 | scm_call_0 (SCM proc) | |
4027 | { | |
4028 | return scm_apply (proc, SCM_EOL, SCM_EOL); | |
4029 | } | |
4030 | ||
4031 | SCM | |
4032 | scm_call_1 (SCM proc, SCM arg1) | |
4033 | { | |
4034 | return scm_apply (proc, arg1, scm_listofnull); | |
4035 | } | |
4036 | ||
4037 | SCM | |
4038 | scm_call_2 (SCM proc, SCM arg1, SCM arg2) | |
4039 | { | |
4040 | return scm_apply (proc, arg1, scm_cons (arg2, scm_listofnull)); | |
4041 | } | |
4042 | ||
4043 | SCM | |
4044 | scm_call_3 (SCM proc, SCM arg1, SCM arg2, SCM arg3) | |
4045 | { | |
4046 | return scm_apply (proc, arg1, scm_cons2 (arg2, arg3, scm_listofnull)); | |
4047 | } | |
4048 | ||
d95c0b76 NJ |
4049 | SCM |
4050 | scm_call_4 (SCM proc, SCM arg1, SCM arg2, SCM arg3, SCM arg4) | |
4051 | { | |
4052 | return scm_apply (proc, arg1, scm_cons2 (arg2, arg3, | |
4053 | scm_cons (arg4, scm_listofnull))); | |
4054 | } | |
4055 | ||
fdc28395 KN |
4056 | /* Simple procedure applies |
4057 | */ | |
4058 | ||
4059 | SCM | |
4060 | scm_apply_0 (SCM proc, SCM args) | |
4061 | { | |
4062 | return scm_apply (proc, args, SCM_EOL); | |
4063 | } | |
4064 | ||
4065 | SCM | |
4066 | scm_apply_1 (SCM proc, SCM arg1, SCM args) | |
4067 | { | |
4068 | return scm_apply (proc, scm_cons (arg1, args), SCM_EOL); | |
4069 | } | |
4070 | ||
4071 | SCM | |
4072 | scm_apply_2 (SCM proc, SCM arg1, SCM arg2, SCM args) | |
4073 | { | |
4074 | return scm_apply (proc, scm_cons2 (arg1, arg2, args), SCM_EOL); | |
4075 | } | |
4076 | ||
4077 | SCM | |
4078 | scm_apply_3 (SCM proc, SCM arg1, SCM arg2, SCM arg3, SCM args) | |
4079 | { | |
4080 | return scm_apply (proc, scm_cons (arg1, scm_cons2 (arg2, arg3, args)), | |
4081 | SCM_EOL); | |
4082 | } | |
4083 | ||
82a2622a | 4084 | /* This code processes the arguments to apply: |
b145c172 JB |
4085 | |
4086 | (apply PROC ARG1 ... ARGS) | |
4087 | ||
82a2622a JB |
4088 | Given a list (ARG1 ... ARGS), this function conses the ARG1 |
4089 | ... arguments onto the front of ARGS, and returns the resulting | |
4090 | list. Note that ARGS is a list; thus, the argument to this | |
4091 | function is a list whose last element is a list. | |
4092 | ||
4093 | Apply calls this function, and applies PROC to the elements of the | |
b145c172 JB |
4094 | result. apply:nconc2last takes care of building the list of |
4095 | arguments, given (ARG1 ... ARGS). | |
4096 | ||
82a2622a JB |
4097 | Rather than do new consing, apply:nconc2last destroys its argument. |
4098 | On that topic, this code came into my care with the following | |
4099 | beautifully cryptic comment on that topic: "This will only screw | |
4100 | you if you do (scm_apply scm_apply '( ... ))" If you know what | |
4101 | they're referring to, send me a patch to this comment. */ | |
b145c172 | 4102 | |
3b3b36dd | 4103 | SCM_DEFINE (scm_nconc2last, "apply:nconc2last", 1, 0, 0, |
b3f26b14 MG |
4104 | (SCM lst), |
4105 | "Given a list (@var{arg1} @dots{} @var{args}), this function\n" | |
4106 | "conses the @var{arg1} @dots{} arguments onto the front of\n" | |
4107 | "@var{args}, and returns the resulting list. Note that\n" | |
4108 | "@var{args} is a list; thus, the argument to this function is\n" | |
4109 | "a list whose last element is a list.\n" | |
4110 | "Note: Rather than do new consing, @code{apply:nconc2last}\n" | |
4111 | "destroys its argument, so use with care.") | |
1bbd0b84 | 4112 | #define FUNC_NAME s_scm_nconc2last |
0f2d19dd JB |
4113 | { |
4114 | SCM *lloc; | |
34d19ef6 | 4115 | SCM_VALIDATE_NONEMPTYLIST (1, lst); |
0f2d19dd | 4116 | lloc = &lst; |
c96d76b8 NJ |
4117 | while (!SCM_NULLP (SCM_CDR (*lloc))) /* Perhaps should be |
4118 | SCM_NULL_OR_NIL_P, but not | |
4119 | needed in 99.99% of cases, | |
4120 | and it could seriously hurt | |
4121 | performance. - Neil */ | |
a23afe53 | 4122 | lloc = SCM_CDRLOC (*lloc); |
1bbd0b84 | 4123 | SCM_ASSERT (scm_ilength (SCM_CAR (*lloc)) >= 0, lst, SCM_ARG1, FUNC_NAME); |
0f2d19dd JB |
4124 | *lloc = SCM_CAR (*lloc); |
4125 | return lst; | |
4126 | } | |
1bbd0b84 | 4127 | #undef FUNC_NAME |
0f2d19dd JB |
4128 | |
4129 | #endif /* !DEVAL */ | |
4130 | ||
6dbd0af5 MD |
4131 | |
4132 | /* SECTION: When DEVAL is defined this code yields scm_dapply. | |
4133 | * It is compiled twice. | |
4134 | */ | |
4135 | ||
0f2d19dd | 4136 | #if 0 |
0f2d19dd | 4137 | SCM |
6e8d25a6 | 4138 | scm_apply (SCM proc, SCM arg1, SCM args) |
0f2d19dd JB |
4139 | {} |
4140 | #endif | |
4141 | ||
4142 | #if 0 | |
0f2d19dd | 4143 | SCM |
6e8d25a6 | 4144 | scm_dapply (SCM proc, SCM arg1, SCM args) |
d0b07b5d | 4145 | {} |
0f2d19dd JB |
4146 | #endif |
4147 | ||
1cc91f1b | 4148 | |
82a2622a JB |
4149 | /* Apply a function to a list of arguments. |
4150 | ||
4151 | This function is exported to the Scheme level as taking two | |
4152 | required arguments and a tail argument, as if it were: | |
4153 | (lambda (proc arg1 . args) ...) | |
4154 | Thus, if you just have a list of arguments to pass to a procedure, | |
4155 | pass the list as ARG1, and '() for ARGS. If you have some fixed | |
4156 | args, pass the first as ARG1, then cons any remaining fixed args | |
4157 | onto the front of your argument list, and pass that as ARGS. */ | |
4158 | ||
0f2d19dd | 4159 | SCM |
1bbd0b84 | 4160 | SCM_APPLY (SCM proc, SCM arg1, SCM args) |
0f2d19dd | 4161 | { |
0f2d19dd | 4162 | #ifdef DEVAL |
92c2555f MV |
4163 | scm_t_debug_frame debug; |
4164 | scm_t_debug_info debug_vect_body; | |
1646d37b | 4165 | debug.prev = scm_last_debug_frame; |
b7ff98dd | 4166 | debug.status = SCM_APPLYFRAME; |
c0ab1b8d | 4167 | debug.vect = &debug_vect_body; |
6dbd0af5 MD |
4168 | debug.vect[0].a.proc = proc; |
4169 | debug.vect[0].a.args = SCM_EOL; | |
1646d37b | 4170 | scm_last_debug_frame = &debug; |
0f2d19dd | 4171 | #else |
b7ff98dd | 4172 | if (SCM_DEBUGGINGP) |
0f2d19dd | 4173 | return scm_dapply (proc, arg1, args); |
0f2d19dd JB |
4174 | #endif |
4175 | ||
4176 | SCM_ASRTGO (SCM_NIMP (proc), badproc); | |
82a2622a JB |
4177 | |
4178 | /* If ARGS is the empty list, then we're calling apply with only two | |
4179 | arguments --- ARG1 is the list of arguments for PROC. Whatever | |
4180 | the case, futz with things so that ARG1 is the first argument to | |
4181 | give to PROC (or SCM_UNDEFINED if no args), and ARGS contains the | |
30000774 JB |
4182 | rest. |
4183 | ||
4184 | Setting the debug apply frame args this way is pretty messy. | |
4185 | Perhaps we should store arg1 and args directly in the frame as | |
4186 | received, and let scm_frame_arguments unpack them, because that's | |
4187 | a relatively rare operation. This works for now; if the Guile | |
4188 | developer archives are still around, see Mikael's post of | |
4189 | 11-Apr-97. */ | |
0f2d19dd JB |
4190 | if (SCM_NULLP (args)) |
4191 | { | |
4192 | if (SCM_NULLP (arg1)) | |
30000774 JB |
4193 | { |
4194 | arg1 = SCM_UNDEFINED; | |
4195 | #ifdef DEVAL | |
4196 | debug.vect[0].a.args = SCM_EOL; | |
4197 | #endif | |
4198 | } | |
0f2d19dd JB |
4199 | else |
4200 | { | |
30000774 JB |
4201 | #ifdef DEVAL |
4202 | debug.vect[0].a.args = arg1; | |
4203 | #endif | |
0f2d19dd JB |
4204 | args = SCM_CDR (arg1); |
4205 | arg1 = SCM_CAR (arg1); | |
4206 | } | |
4207 | } | |
4208 | else | |
4209 | { | |
0f2d19dd | 4210 | args = scm_nconc2last (args); |
30000774 JB |
4211 | #ifdef DEVAL |
4212 | debug.vect[0].a.args = scm_cons (arg1, args); | |
4213 | #endif | |
0f2d19dd | 4214 | } |
0f2d19dd | 4215 | #ifdef DEVAL |
b6d75948 | 4216 | if (SCM_ENTER_FRAME_P && SCM_TRAPS_P) |
6dbd0af5 MD |
4217 | { |
4218 | SCM tmp; | |
b7ff98dd | 4219 | if (SCM_CHEAPTRAPS_P) |
c0ab1b8d | 4220 | tmp = scm_make_debugobj (&debug); |
6dbd0af5 MD |
4221 | else |
4222 | { | |
5f144b10 GH |
4223 | int first; |
4224 | ||
4225 | tmp = scm_make_continuation (&first); | |
4226 | if (!first) | |
6dbd0af5 MD |
4227 | goto entap; |
4228 | } | |
d95c0b76 NJ |
4229 | SCM_TRAPS_P = 0; |
4230 | scm_call_2 (SCM_ENTER_FRAME_HDLR, scm_sym_enter_frame, tmp); | |
4231 | SCM_TRAPS_P = 1; | |
6dbd0af5 MD |
4232 | } |
4233 | entap: | |
4234 | ENTER_APPLY; | |
4235 | #endif | |
6dbd0af5 | 4236 | tail: |
0f2d19dd JB |
4237 | switch (SCM_TYP7 (proc)) |
4238 | { | |
4239 | case scm_tc7_subr_2o: | |
4240 | args = SCM_NULLP (args) ? SCM_UNDEFINED : SCM_CAR (args); | |
ddea3325 | 4241 | RETURN (SCM_SUBRF (proc) (arg1, args)); |
0f2d19dd | 4242 | case scm_tc7_subr_2: |
ab1f1094 DH |
4243 | if (SCM_NULLP (args) || !SCM_NULLP (SCM_CDR (args))) |
4244 | scm_wrong_num_args (proc); | |
0f2d19dd | 4245 | args = SCM_CAR (args); |
ddea3325 | 4246 | RETURN (SCM_SUBRF (proc) (arg1, args)); |
0f2d19dd | 4247 | case scm_tc7_subr_0: |
ab1f1094 DH |
4248 | if (!SCM_UNBNDP (arg1)) |
4249 | scm_wrong_num_args (proc); | |
4250 | else | |
4251 | RETURN (SCM_SUBRF (proc) ()); | |
0f2d19dd | 4252 | case scm_tc7_subr_1: |
ab1f1094 DH |
4253 | if (SCM_UNBNDP (arg1)) |
4254 | scm_wrong_num_args (proc); | |
0f2d19dd | 4255 | case scm_tc7_subr_1o: |
ab1f1094 DH |
4256 | if (!SCM_NULLP (args)) |
4257 | scm_wrong_num_args (proc); | |
4258 | else | |
4259 | RETURN (SCM_SUBRF (proc) (arg1)); | |
14b18ed6 DH |
4260 | case scm_tc7_dsubr: |
4261 | if (SCM_UNBNDP (arg1) || !SCM_NULLP (args)) | |
4262 | scm_wrong_num_args (proc); | |
4263 | if (SCM_INUMP (arg1)) | |
4264 | { | |
4265 | RETURN (scm_make_real (SCM_DSUBRF (proc) ((double) SCM_INUM (arg1)))); | |
4266 | } | |
4267 | else if (SCM_REALP (arg1)) | |
4268 | { | |
4269 | RETURN (scm_make_real (SCM_DSUBRF (proc) (SCM_REAL_VALUE (arg1)))); | |
4270 | } | |
4271 | else if (SCM_BIGP (arg1)) | |
4272 | RETURN (scm_make_real (SCM_DSUBRF (proc) (scm_i_big2dbl (arg1)))); | |
4273 | SCM_WTA_DISPATCH_1 (*SCM_SUBR_GENERIC (proc), arg1, | |
4274 | SCM_ARG1, SCM_SYMBOL_CHARS (SCM_SNAME (proc))); | |
0f2d19dd | 4275 | case scm_tc7_cxr: |
ab1f1094 DH |
4276 | if (SCM_UNBNDP (arg1) || !SCM_NULLP (args)) |
4277 | scm_wrong_num_args (proc); | |
0f2d19dd | 4278 | { |
14b18ed6 DH |
4279 | unsigned char pattern = (scm_t_bits) SCM_SUBRF (proc); |
4280 | do | |
4281 | { | |
4282 | SCM_ASSERT (SCM_CONSP (arg1), arg1, SCM_ARG1, | |
4283 | SCM_SYMBOL_CHARS (SCM_SNAME (proc))); | |
4284 | arg1 = (pattern & 1) ? SCM_CAR (arg1) : SCM_CDR (arg1); | |
4285 | pattern >>= 2; | |
4286 | } while (pattern); | |
4287 | RETURN (arg1); | |
0f2d19dd JB |
4288 | } |
4289 | case scm_tc7_subr_3: | |
ab1f1094 DH |
4290 | if (SCM_NULLP (args) |
4291 | || SCM_NULLP (SCM_CDR (args)) | |
4292 | || !SCM_NULLP (SCM_CDDR (args))) | |
4293 | scm_wrong_num_args (proc); | |
4294 | else | |
4295 | RETURN (SCM_SUBRF (proc) (arg1, SCM_CAR (args), SCM_CADR (args))); | |
0f2d19dd JB |
4296 | case scm_tc7_lsubr: |
4297 | #ifdef DEVAL | |
ddea3325 | 4298 | RETURN (SCM_SUBRF (proc) (SCM_UNBNDP (arg1) ? SCM_EOL : debug.vect[0].a.args)); |
0f2d19dd | 4299 | #else |
ddea3325 | 4300 | RETURN (SCM_SUBRF (proc) (SCM_UNBNDP (arg1) ? SCM_EOL : scm_cons (arg1, args))); |
0f2d19dd JB |
4301 | #endif |
4302 | case scm_tc7_lsubr_2: | |
ab1f1094 DH |
4303 | if (!SCM_CONSP (args)) |
4304 | scm_wrong_num_args (proc); | |
4305 | else | |
4306 | RETURN (SCM_SUBRF (proc) (arg1, SCM_CAR (args), SCM_CDR (args))); | |
0f2d19dd JB |
4307 | case scm_tc7_asubr: |
4308 | if (SCM_NULLP (args)) | |
ddea3325 | 4309 | RETURN (SCM_SUBRF (proc) (arg1, SCM_UNDEFINED)); |
0f2d19dd JB |
4310 | while (SCM_NIMP (args)) |
4311 | { | |
4312 | SCM_ASSERT (SCM_CONSP (args), args, SCM_ARG2, "apply"); | |
4313 | arg1 = SCM_SUBRF (proc) (arg1, SCM_CAR (args)); | |
4314 | args = SCM_CDR (args); | |
4315 | } | |
4316 | RETURN (arg1); | |
4317 | case scm_tc7_rpsubr: | |
4318 | if (SCM_NULLP (args)) | |
4319 | RETURN (SCM_BOOL_T); | |
4320 | while (SCM_NIMP (args)) | |
4321 | { | |
4322 | SCM_ASSERT (SCM_CONSP (args), args, SCM_ARG2, "apply"); | |
4323 | if (SCM_FALSEP (SCM_SUBRF (proc) (arg1, SCM_CAR (args)))) | |
4324 | RETURN (SCM_BOOL_F); | |
4325 | arg1 = SCM_CAR (args); | |
4326 | args = SCM_CDR (args); | |
4327 | } | |
4328 | RETURN (SCM_BOOL_T); | |
4329 | case scm_tcs_closures: | |
4330 | #ifdef DEVAL | |
6dbd0af5 | 4331 | arg1 = (SCM_UNBNDP (arg1) ? SCM_EOL : debug.vect[0].a.args); |
0f2d19dd JB |
4332 | #else |
4333 | arg1 = (SCM_UNBNDP (arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
4334 | #endif | |
726d810a | 4335 | if (scm_badargsp (SCM_CLOSURE_FORMALS (proc), arg1)) |
ab1f1094 | 4336 | scm_wrong_num_args (proc); |
1609038c MD |
4337 | |
4338 | /* Copy argument list */ | |
4339 | if (SCM_IMP (arg1)) | |
4340 | args = arg1; | |
4341 | else | |
4342 | { | |
4343 | SCM tl = args = scm_cons (SCM_CAR (arg1), SCM_UNSPECIFIED); | |
05b15362 | 4344 | for (arg1 = SCM_CDR (arg1); SCM_CONSP (arg1); arg1 = SCM_CDR (arg1)) |
1609038c | 4345 | { |
05b15362 | 4346 | SCM_SETCDR (tl, scm_cons (SCM_CAR (arg1), SCM_UNSPECIFIED)); |
1609038c MD |
4347 | tl = SCM_CDR (tl); |
4348 | } | |
4349 | SCM_SETCDR (tl, arg1); | |
4350 | } | |
4351 | ||
821f18a4 DH |
4352 | args = SCM_EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), |
4353 | args, | |
4354 | SCM_ENV (proc)); | |
f9450cdb | 4355 | proc = SCM_CLOSURE_BODY (proc); |
e791c18f | 4356 | again: |
05b15362 DH |
4357 | arg1 = SCM_CDR (proc); |
4358 | while (!SCM_NULLP (arg1)) | |
2ddb0920 MD |
4359 | { |
4360 | if (SCM_IMP (SCM_CAR (proc))) | |
4361 | { | |
4362 | if (SCM_ISYMP (SCM_CAR (proc))) | |
4363 | { | |
28d52ebb | 4364 | scm_rec_mutex_lock (&source_mutex); |
9bc4701c MD |
4365 | /* check for race condition */ |
4366 | if (SCM_ISYMP (SCM_CAR (proc))) | |
328dc9a3 | 4367 | proc = m_expand_body (proc, args); |
28d52ebb | 4368 | scm_rec_mutex_unlock (&source_mutex); |
e791c18f | 4369 | goto again; |
2ddb0920 | 4370 | } |
5280aaca | 4371 | else |
17fa3fcf | 4372 | SCM_VALIDATE_NON_EMPTY_COMBINATION (SCM_CAR (proc)); |
2ddb0920 MD |
4373 | } |
4374 | else | |
e791c18f MD |
4375 | SCM_CEVAL (SCM_CAR (proc), args); |
4376 | proc = arg1; | |
05b15362 | 4377 | arg1 = SCM_CDR (proc); |
2ddb0920 | 4378 | } |
e791c18f | 4379 | RETURN (EVALCAR (proc, args)); |
0717dfd8 | 4380 | case scm_tc7_smob: |
68b06924 | 4381 | if (!SCM_SMOB_APPLICABLE_P (proc)) |
0717dfd8 | 4382 | goto badproc; |
afa38f6e | 4383 | if (SCM_UNBNDP (arg1)) |
ddea3325 | 4384 | RETURN (SCM_SMOB_APPLY_0 (proc)); |
afa38f6e | 4385 | else if (SCM_NULLP (args)) |
ddea3325 | 4386 | RETURN (SCM_SMOB_APPLY_1 (proc, arg1)); |
0717dfd8 | 4387 | else if (SCM_NULLP (SCM_CDR (args))) |
ddea3325 | 4388 | RETURN (SCM_SMOB_APPLY_2 (proc, arg1, SCM_CAR (args))); |
0717dfd8 | 4389 | else |
68b06924 | 4390 | RETURN (SCM_SMOB_APPLY_3 (proc, arg1, SCM_CAR (args), SCM_CDR (args))); |
0f2d19dd JB |
4391 | case scm_tc7_cclo: |
4392 | #ifdef DEVAL | |
6dbd0af5 MD |
4393 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : debug.vect[0].a.args); |
4394 | arg1 = proc; | |
4395 | proc = SCM_CCLO_SUBR (proc); | |
4396 | debug.vect[0].a.proc = proc; | |
4397 | debug.vect[0].a.args = scm_cons (arg1, args); | |
0f2d19dd JB |
4398 | #else |
4399 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
0f2d19dd JB |
4400 | arg1 = proc; |
4401 | proc = SCM_CCLO_SUBR (proc); | |
6dbd0af5 | 4402 | #endif |
0f2d19dd | 4403 | goto tail; |
89efbff4 MD |
4404 | case scm_tc7_pws: |
4405 | proc = SCM_PROCEDURE (proc); | |
4406 | #ifdef DEVAL | |
4407 | debug.vect[0].a.proc = proc; | |
4408 | #endif | |
4409 | goto tail; | |
904a077d | 4410 | case scm_tcs_struct: |
f3d2630a MD |
4411 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) |
4412 | { | |
4413 | #ifdef DEVAL | |
4414 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : debug.vect[0].a.args); | |
4415 | #else | |
4416 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
4417 | #endif | |
195847fa | 4418 | RETURN (scm_apply_generic (proc, args)); |
f3d2630a | 4419 | } |
2ca0d207 | 4420 | else if (SCM_I_OPERATORP (proc)) |
da7f71d7 | 4421 | { |
504d99c5 | 4422 | /* operator */ |
da7f71d7 MD |
4423 | #ifdef DEVAL |
4424 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : debug.vect[0].a.args); | |
4425 | #else | |
4426 | args = (SCM_UNBNDP(arg1) ? SCM_EOL : scm_cons (arg1, args)); | |
4427 | #endif | |
4428 | arg1 = proc; | |
195847fa MD |
4429 | proc = (SCM_I_ENTITYP (proc) |
4430 | ? SCM_ENTITY_PROCEDURE (proc) | |
4431 | : SCM_OPERATOR_PROCEDURE (proc)); | |
da7f71d7 MD |
4432 | #ifdef DEVAL |
4433 | debug.vect[0].a.proc = proc; | |
4434 | debug.vect[0].a.args = scm_cons (arg1, args); | |
4435 | #endif | |
195847fa MD |
4436 | if (SCM_NIMP (proc)) |
4437 | goto tail; | |
4438 | else | |
4439 | goto badproc; | |
da7f71d7 | 4440 | } |
2ca0d207 DH |
4441 | else |
4442 | goto badproc; | |
0f2d19dd JB |
4443 | default: |
4444 | badproc: | |
db4b4ca6 | 4445 | scm_wrong_type_arg ("apply", SCM_ARG1, proc); |
0f2d19dd JB |
4446 | } |
4447 | #ifdef DEVAL | |
6dbd0af5 | 4448 | exit: |
5132eef0 | 4449 | if (scm_check_exit_p && SCM_TRAPS_P) |
b7ff98dd | 4450 | if (SCM_EXIT_FRAME_P || (SCM_TRACE_P && SCM_TRACED_FRAME_P (debug))) |
6dbd0af5 | 4451 | { |
b7ff98dd MD |
4452 | SCM_CLEAR_TRACED_FRAME (debug); |
4453 | if (SCM_CHEAPTRAPS_P) | |
c0ab1b8d | 4454 | arg1 = scm_make_debugobj (&debug); |
6dbd0af5 MD |
4455 | else |
4456 | { | |
5f144b10 GH |
4457 | int first; |
4458 | SCM val = scm_make_continuation (&first); | |
4459 | ||
4460 | if (first) | |
4461 | arg1 = val; | |
4462 | else | |
6dbd0af5 | 4463 | { |
5f144b10 | 4464 | proc = val; |
6dbd0af5 MD |
4465 | goto ret; |
4466 | } | |
4467 | } | |
d95c0b76 NJ |
4468 | SCM_TRAPS_P = 0; |
4469 | scm_call_3 (SCM_EXIT_FRAME_HDLR, scm_sym_exit_frame, arg1, proc); | |
4470 | SCM_TRAPS_P = 1; | |
6dbd0af5 MD |
4471 | } |
4472 | ret: | |
1646d37b | 4473 | scm_last_debug_frame = debug.prev; |
0f2d19dd JB |
4474 | return proc; |
4475 | #endif | |
4476 | } | |
4477 | ||
6dbd0af5 MD |
4478 | |
4479 | /* SECTION: The rest of this file is only read once. | |
4480 | */ | |
4481 | ||
0f2d19dd JB |
4482 | #ifndef DEVAL |
4483 | ||
504d99c5 MD |
4484 | /* Trampolines |
4485 | * | |
4486 | * Trampolines make it possible to move procedure application dispatch | |
4487 | * outside inner loops. The motivation was clean implementation of | |
4488 | * efficient replacements of R5RS primitives in SRFI-1. | |
4489 | * | |
4490 | * The semantics is clear: scm_trampoline_N returns an optimized | |
4491 | * version of scm_call_N (or NULL if the procedure isn't applicable | |
4492 | * on N args). | |
4493 | * | |
4494 | * Applying the optimization to map and for-each increased efficiency | |
4495 | * noticeably. For example, (map abs ls) is now 8 times faster than | |
4496 | * before. | |
4497 | */ | |
4498 | ||
756414cf MD |
4499 | static SCM |
4500 | call_subr0_0 (SCM proc) | |
4501 | { | |
4502 | return SCM_SUBRF (proc) (); | |
4503 | } | |
4504 | ||
4505 | static SCM | |
4506 | call_subr1o_0 (SCM proc) | |
4507 | { | |
4508 | return SCM_SUBRF (proc) (SCM_UNDEFINED); | |
4509 | } | |
4510 | ||
4511 | static SCM | |
4512 | call_lsubr_0 (SCM proc) | |
4513 | { | |
4514 | return SCM_SUBRF (proc) (SCM_EOL); | |
4515 | } | |
4516 | ||
4517 | SCM | |
4518 | scm_i_call_closure_0 (SCM proc) | |
4519 | { | |
6a3f13f0 DH |
4520 | const SCM env = SCM_EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), |
4521 | SCM_EOL, | |
4522 | SCM_ENV (proc)); | |
4523 | const SCM result = scm_eval_body (SCM_CLOSURE_BODY (proc), env); | |
d0b07b5d | 4524 | return result; |
756414cf MD |
4525 | } |
4526 | ||
4527 | scm_t_trampoline_0 | |
4528 | scm_trampoline_0 (SCM proc) | |
4529 | { | |
2510c810 DH |
4530 | scm_t_trampoline_0 trampoline; |
4531 | ||
756414cf | 4532 | if (SCM_IMP (proc)) |
d0b07b5d | 4533 | return NULL; |
2510c810 | 4534 | |
756414cf MD |
4535 | switch (SCM_TYP7 (proc)) |
4536 | { | |
4537 | case scm_tc7_subr_0: | |
2510c810 DH |
4538 | trampoline = call_subr0_0; |
4539 | break; | |
756414cf | 4540 | case scm_tc7_subr_1o: |
2510c810 DH |
4541 | trampoline = call_subr1o_0; |
4542 | break; | |
756414cf | 4543 | case scm_tc7_lsubr: |
2510c810 DH |
4544 | trampoline = call_lsubr_0; |
4545 | break; | |
756414cf MD |
4546 | case scm_tcs_closures: |
4547 | { | |
4548 | SCM formals = SCM_CLOSURE_FORMALS (proc); | |
4b612c5b | 4549 | if (SCM_NULLP (formals) || !SCM_CONSP (formals)) |
2510c810 | 4550 | trampoline = scm_i_call_closure_0; |
756414cf | 4551 | else |
d0b07b5d | 4552 | return NULL; |
2510c810 | 4553 | break; |
756414cf MD |
4554 | } |
4555 | case scm_tcs_struct: | |
4556 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) | |
2510c810 | 4557 | trampoline = scm_call_generic_0; |
2ca0d207 | 4558 | else if (SCM_I_OPERATORP (proc)) |
2510c810 DH |
4559 | trampoline = scm_call_0; |
4560 | else | |
4561 | return NULL; | |
4562 | break; | |
756414cf MD |
4563 | case scm_tc7_smob: |
4564 | if (SCM_SMOB_APPLICABLE_P (proc)) | |
2510c810 | 4565 | trampoline = SCM_SMOB_DESCRIPTOR (proc).apply_0; |
756414cf | 4566 | else |
d0b07b5d | 4567 | return NULL; |
2510c810 | 4568 | break; |
756414cf MD |
4569 | case scm_tc7_asubr: |
4570 | case scm_tc7_rpsubr: | |
4571 | case scm_tc7_cclo: | |
4572 | case scm_tc7_pws: | |
2510c810 DH |
4573 | trampoline = scm_call_0; |
4574 | break; | |
756414cf | 4575 | default: |
2510c810 | 4576 | return NULL; /* not applicable on zero arguments */ |
756414cf | 4577 | } |
2510c810 DH |
4578 | /* We only reach this point if a valid trampoline was determined. */ |
4579 | ||
4580 | /* If debugging is enabled, we want to see all calls to proc on the stack. | |
4581 | * Thus, we replace the trampoline shortcut with scm_call_0. */ | |
4582 | if (SCM_DEBUGGINGP) | |
4583 | return scm_call_0; | |
4584 | else | |
4585 | return trampoline; | |
756414cf MD |
4586 | } |
4587 | ||
504d99c5 MD |
4588 | static SCM |
4589 | call_subr1_1 (SCM proc, SCM arg1) | |
4590 | { | |
4591 | return SCM_SUBRF (proc) (arg1); | |
4592 | } | |
4593 | ||
9ed24633 MD |
4594 | static SCM |
4595 | call_subr2o_1 (SCM proc, SCM arg1) | |
4596 | { | |
4597 | return SCM_SUBRF (proc) (arg1, SCM_UNDEFINED); | |
4598 | } | |
4599 | ||
504d99c5 MD |
4600 | static SCM |
4601 | call_lsubr_1 (SCM proc, SCM arg1) | |
4602 | { | |
4603 | return SCM_SUBRF (proc) (scm_list_1 (arg1)); | |
4604 | } | |
4605 | ||
4606 | static SCM | |
4607 | call_dsubr_1 (SCM proc, SCM arg1) | |
4608 | { | |
4609 | if (SCM_INUMP (arg1)) | |
4610 | { | |
4611 | RETURN (scm_make_real (SCM_DSUBRF (proc) ((double) SCM_INUM (arg1)))); | |
4612 | } | |
4613 | else if (SCM_REALP (arg1)) | |
4614 | { | |
4615 | RETURN (scm_make_real (SCM_DSUBRF (proc) (SCM_REAL_VALUE (arg1)))); | |
4616 | } | |
504d99c5 MD |
4617 | else if (SCM_BIGP (arg1)) |
4618 | RETURN (scm_make_real (SCM_DSUBRF (proc) (scm_i_big2dbl (arg1)))); | |
504d99c5 MD |
4619 | SCM_WTA_DISPATCH_1 (*SCM_SUBR_GENERIC (proc), arg1, |
4620 | SCM_ARG1, SCM_SYMBOL_CHARS (SCM_SNAME (proc))); | |
4621 | } | |
4622 | ||
4623 | static SCM | |
4624 | call_cxr_1 (SCM proc, SCM arg1) | |
4625 | { | |
14b18ed6 DH |
4626 | unsigned char pattern = (scm_t_bits) SCM_SUBRF (proc); |
4627 | do | |
4628 | { | |
4629 | SCM_ASSERT (SCM_CONSP (arg1), arg1, SCM_ARG1, | |
4630 | SCM_SYMBOL_CHARS (SCM_SNAME (proc))); | |
4631 | arg1 = (pattern & 1) ? SCM_CAR (arg1) : SCM_CDR (arg1); | |
4632 | pattern >>= 2; | |
4633 | } while (pattern); | |
4634 | return arg1; | |
504d99c5 MD |
4635 | } |
4636 | ||
4637 | static SCM | |
4638 | call_closure_1 (SCM proc, SCM arg1) | |
4639 | { | |
6a3f13f0 DH |
4640 | const SCM env = SCM_EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), |
4641 | scm_list_1 (arg1), | |
4642 | SCM_ENV (proc)); | |
4643 | const SCM result = scm_eval_body (SCM_CLOSURE_BODY (proc), env); | |
d0b07b5d | 4644 | return result; |
504d99c5 MD |
4645 | } |
4646 | ||
4647 | scm_t_trampoline_1 | |
4648 | scm_trampoline_1 (SCM proc) | |
4649 | { | |
2510c810 DH |
4650 | scm_t_trampoline_1 trampoline; |
4651 | ||
504d99c5 | 4652 | if (SCM_IMP (proc)) |
d0b07b5d | 4653 | return NULL; |
2510c810 | 4654 | |
504d99c5 MD |
4655 | switch (SCM_TYP7 (proc)) |
4656 | { | |
4657 | case scm_tc7_subr_1: | |
4658 | case scm_tc7_subr_1o: | |
2510c810 DH |
4659 | trampoline = call_subr1_1; |
4660 | break; | |
9ed24633 | 4661 | case scm_tc7_subr_2o: |
2510c810 DH |
4662 | trampoline = call_subr2o_1; |
4663 | break; | |
504d99c5 | 4664 | case scm_tc7_lsubr: |
2510c810 DH |
4665 | trampoline = call_lsubr_1; |
4666 | break; | |
14b18ed6 | 4667 | case scm_tc7_dsubr: |
2510c810 DH |
4668 | trampoline = call_dsubr_1; |
4669 | break; | |
504d99c5 | 4670 | case scm_tc7_cxr: |
2510c810 DH |
4671 | trampoline = call_cxr_1; |
4672 | break; | |
504d99c5 MD |
4673 | case scm_tcs_closures: |
4674 | { | |
4675 | SCM formals = SCM_CLOSURE_FORMALS (proc); | |
4b612c5b MD |
4676 | if (!SCM_NULLP (formals) |
4677 | && (!SCM_CONSP (formals) || !SCM_CONSP (SCM_CDR (formals)))) | |
2510c810 | 4678 | trampoline = call_closure_1; |
504d99c5 | 4679 | else |
d0b07b5d | 4680 | return NULL; |
2510c810 | 4681 | break; |
504d99c5 MD |
4682 | } |
4683 | case scm_tcs_struct: | |
4684 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) | |
2510c810 | 4685 | trampoline = scm_call_generic_1; |
2ca0d207 | 4686 | else if (SCM_I_OPERATORP (proc)) |
2510c810 DH |
4687 | trampoline = scm_call_1; |
4688 | else | |
4689 | return NULL; | |
4690 | break; | |
504d99c5 MD |
4691 | case scm_tc7_smob: |
4692 | if (SCM_SMOB_APPLICABLE_P (proc)) | |
2510c810 | 4693 | trampoline = SCM_SMOB_DESCRIPTOR (proc).apply_1; |
504d99c5 | 4694 | else |
d0b07b5d | 4695 | return NULL; |
2510c810 | 4696 | break; |
504d99c5 MD |
4697 | case scm_tc7_asubr: |
4698 | case scm_tc7_rpsubr: | |
4699 | case scm_tc7_cclo: | |
4700 | case scm_tc7_pws: | |
2510c810 DH |
4701 | trampoline = scm_call_1; |
4702 | break; | |
504d99c5 | 4703 | default: |
d0b07b5d | 4704 | return NULL; /* not applicable on one arg */ |
504d99c5 | 4705 | } |
2510c810 DH |
4706 | /* We only reach this point if a valid trampoline was determined. */ |
4707 | ||
4708 | /* If debugging is enabled, we want to see all calls to proc on the stack. | |
4709 | * Thus, we replace the trampoline shortcut with scm_call_1. */ | |
4710 | if (SCM_DEBUGGINGP) | |
4711 | return scm_call_1; | |
4712 | else | |
4713 | return trampoline; | |
504d99c5 MD |
4714 | } |
4715 | ||
4716 | static SCM | |
4717 | call_subr2_2 (SCM proc, SCM arg1, SCM arg2) | |
4718 | { | |
4719 | return SCM_SUBRF (proc) (arg1, arg2); | |
4720 | } | |
4721 | ||
9ed24633 MD |
4722 | static SCM |
4723 | call_lsubr2_2 (SCM proc, SCM arg1, SCM arg2) | |
4724 | { | |
4725 | return SCM_SUBRF (proc) (arg1, arg2, SCM_EOL); | |
4726 | } | |
4727 | ||
504d99c5 MD |
4728 | static SCM |
4729 | call_lsubr_2 (SCM proc, SCM arg1, SCM arg2) | |
4730 | { | |
4731 | return SCM_SUBRF (proc) (scm_list_2 (arg1, arg2)); | |
4732 | } | |
4733 | ||
4734 | static SCM | |
4735 | call_closure_2 (SCM proc, SCM arg1, SCM arg2) | |
4736 | { | |
6a3f13f0 DH |
4737 | const SCM env = SCM_EXTEND_ENV (SCM_CLOSURE_FORMALS (proc), |
4738 | scm_list_2 (arg1, arg2), | |
4739 | SCM_ENV (proc)); | |
4740 | const SCM result = scm_eval_body (SCM_CLOSURE_BODY (proc), env); | |
d0b07b5d | 4741 | return result; |
504d99c5 MD |
4742 | } |
4743 | ||
4744 | scm_t_trampoline_2 | |
4745 | scm_trampoline_2 (SCM proc) | |
4746 | { | |
2510c810 DH |
4747 | scm_t_trampoline_2 trampoline; |
4748 | ||
504d99c5 | 4749 | if (SCM_IMP (proc)) |
d0b07b5d | 4750 | return NULL; |
2510c810 | 4751 | |
504d99c5 MD |
4752 | switch (SCM_TYP7 (proc)) |
4753 | { | |
4754 | case scm_tc7_subr_2: | |
4755 | case scm_tc7_subr_2o: | |
4756 | case scm_tc7_rpsubr: | |
4757 | case scm_tc7_asubr: | |
2510c810 DH |
4758 | trampoline = call_subr2_2; |
4759 | break; | |
9ed24633 | 4760 | case scm_tc7_lsubr_2: |
2510c810 DH |
4761 | trampoline = call_lsubr2_2; |
4762 | break; | |
504d99c5 | 4763 | case scm_tc7_lsubr: |
2510c810 DH |
4764 | trampoline = call_lsubr_2; |
4765 | break; | |
504d99c5 MD |
4766 | case scm_tcs_closures: |
4767 | { | |
4768 | SCM formals = SCM_CLOSURE_FORMALS (proc); | |
4b612c5b MD |
4769 | if (!SCM_NULLP (formals) |
4770 | && (!SCM_CONSP (formals) | |
4771 | || (!SCM_NULLP (SCM_CDR (formals)) | |
4772 | && (!SCM_CONSP (SCM_CDR (formals)) | |
4773 | || !SCM_CONSP (SCM_CDDR (formals)))))) | |
2510c810 | 4774 | trampoline = call_closure_2; |
504d99c5 | 4775 | else |
d0b07b5d | 4776 | return NULL; |
2510c810 | 4777 | break; |
504d99c5 MD |
4778 | } |
4779 | case scm_tcs_struct: | |
4780 | if (SCM_OBJ_CLASS_FLAGS (proc) & SCM_CLASSF_PURE_GENERIC) | |
2510c810 | 4781 | trampoline = scm_call_generic_2; |
2ca0d207 | 4782 | else if (SCM_I_OPERATORP (proc)) |
2510c810 DH |
4783 | trampoline = scm_call_2; |
4784 | else | |
4785 | return NULL; | |
4786 | break; | |
504d99c5 MD |
4787 | case scm_tc7_smob: |
4788 | if (SCM_SMOB_APPLICABLE_P (proc)) | |
2510c810 | 4789 | trampoline = SCM_SMOB_DESCRIPTOR (proc).apply_2; |
504d99c5 | 4790 | else |
d0b07b5d | 4791 | return NULL; |
2510c810 | 4792 | break; |
504d99c5 MD |
4793 | case scm_tc7_cclo: |
4794 | case scm_tc7_pws: | |
2510c810 DH |
4795 | trampoline = scm_call_2; |
4796 | break; | |
504d99c5 | 4797 | default: |
d0b07b5d | 4798 | return NULL; /* not applicable on two args */ |
504d99c5 | 4799 | } |
2510c810 DH |
4800 | /* We only reach this point if a valid trampoline was determined. */ |
4801 | ||
4802 | /* If debugging is enabled, we want to see all calls to proc on the stack. | |
4803 | * Thus, we replace the trampoline shortcut with scm_call_2. */ | |
4804 | if (SCM_DEBUGGINGP) | |
4805 | return scm_call_2; | |
4806 | else | |
4807 | return trampoline; | |
504d99c5 MD |
4808 | } |
4809 | ||
d9c393f5 JB |
4810 | /* Typechecking for multi-argument MAP and FOR-EACH. |
4811 | ||
47c3f06d | 4812 | Verify that each element of the vector ARGV, except for the first, |
d9c393f5 | 4813 | is a proper list whose length is LEN. Attribute errors to WHO, |
47c3f06d | 4814 | and claim that the i'th element of ARGV is WHO's i+2'th argument. */ |
d9c393f5 | 4815 | static inline void |
47c3f06d | 4816 | check_map_args (SCM argv, |
c014a02e | 4817 | long len, |
47c3f06d MD |
4818 | SCM gf, |
4819 | SCM proc, | |
4820 | SCM args, | |
4821 | const char *who) | |
d9c393f5 | 4822 | { |
34d19ef6 | 4823 | SCM const *ve = SCM_VELTS (argv); |
c014a02e | 4824 | long i; |
d9c393f5 | 4825 | |
b5c2579a | 4826 | for (i = SCM_VECTOR_LENGTH (argv) - 1; i >= 1; i--) |
d9c393f5 | 4827 | { |
c014a02e | 4828 | long elt_len = scm_ilength (ve[i]); |
d9c393f5 JB |
4829 | |
4830 | if (elt_len < 0) | |
47c3f06d MD |
4831 | { |
4832 | if (gf) | |
4833 | scm_apply_generic (gf, scm_cons (proc, args)); | |
4834 | else | |
4835 | scm_wrong_type_arg (who, i + 2, ve[i]); | |
4836 | } | |
d9c393f5 JB |
4837 | |
4838 | if (elt_len != len) | |
504d99c5 | 4839 | scm_out_of_range_pos (who, ve[i], SCM_MAKINUM (i + 2)); |
d9c393f5 JB |
4840 | } |
4841 | ||
5d2b97cd | 4842 | scm_remember_upto_here_1 (argv); |
d9c393f5 JB |
4843 | } |
4844 | ||
4845 | ||
47c3f06d | 4846 | SCM_GPROC (s_map, "map", 2, 0, 1, scm_map, g_map); |
1cc91f1b | 4847 | |
368bf056 MD |
4848 | /* Note: Currently, scm_map applies PROC to the argument list(s) |
4849 | sequentially, starting with the first element(s). This is used in | |
8878f040 | 4850 | evalext.c where the Scheme procedure `map-in-order', which guarantees |
368bf056 | 4851 | sequential behaviour, is implemented using scm_map. If the |
8878f040 | 4852 | behaviour changes, we need to update `map-in-order'. |
368bf056 MD |
4853 | */ |
4854 | ||
0f2d19dd | 4855 | SCM |
1bbd0b84 | 4856 | scm_map (SCM proc, SCM arg1, SCM args) |
af45e3b0 | 4857 | #define FUNC_NAME s_map |
0f2d19dd | 4858 | { |
c014a02e | 4859 | long i, len; |
0f2d19dd JB |
4860 | SCM res = SCM_EOL; |
4861 | SCM *pres = &res; | |
34d19ef6 | 4862 | SCM const *ve = &args; /* Keep args from being optimized away. */ |
0f2d19dd | 4863 | |
d9c393f5 | 4864 | len = scm_ilength (arg1); |
47c3f06d MD |
4865 | SCM_GASSERTn (len >= 0, |
4866 | g_map, scm_cons2 (proc, arg1, args), SCM_ARG2, s_map); | |
af45e3b0 | 4867 | SCM_VALIDATE_REST_ARGUMENT (args); |
0f2d19dd JB |
4868 | if (SCM_NULLP (args)) |
4869 | { | |
504d99c5 MD |
4870 | scm_t_trampoline_1 call = scm_trampoline_1 (proc); |
4871 | SCM_GASSERT2 (call, g_map, proc, arg1, SCM_ARG1, s_map); | |
4872 | while (SCM_NIMP (arg1)) | |
4873 | { | |
4874 | *pres = scm_list_1 (call (proc, SCM_CAR (arg1))); | |
4875 | pres = SCM_CDRLOC (*pres); | |
4876 | arg1 = SCM_CDR (arg1); | |
4877 | } | |
4878 | return res; | |
4879 | } | |
4880 | if (SCM_NULLP (SCM_CDR (args))) | |
4881 | { | |
4882 | SCM arg2 = SCM_CAR (args); | |
4883 | int len2 = scm_ilength (arg2); | |
4884 | scm_t_trampoline_2 call = scm_trampoline_2 (proc); | |
4885 | SCM_GASSERTn (call, | |
4886 | g_map, scm_cons2 (proc, arg1, args), SCM_ARG1, s_map); | |
4887 | SCM_GASSERTn (len2 >= 0, | |
4888 | g_map, scm_cons2 (proc, arg1, args), SCM_ARG3, s_map); | |
4889 | if (len2 != len) | |
4890 | SCM_OUT_OF_RANGE (3, arg2); | |
0f2d19dd JB |
4891 | while (SCM_NIMP (arg1)) |
4892 | { | |
504d99c5 | 4893 | *pres = scm_list_1 (call (proc, SCM_CAR (arg1), SCM_CAR (arg2))); |
a23afe53 | 4894 | pres = SCM_CDRLOC (*pres); |
0f2d19dd | 4895 | arg1 = SCM_CDR (arg1); |
504d99c5 | 4896 | arg2 = SCM_CDR (arg2); |
0f2d19dd JB |
4897 | } |
4898 | return res; | |
4899 | } | |
05b15362 DH |
4900 | arg1 = scm_cons (arg1, args); |
4901 | args = scm_vector (arg1); | |
0f2d19dd | 4902 | ve = SCM_VELTS (args); |
47c3f06d | 4903 | check_map_args (args, len, g_map, proc, arg1, s_map); |
0f2d19dd JB |
4904 | while (1) |
4905 | { | |
4906 | arg1 = SCM_EOL; | |
b5c2579a | 4907 | for (i = SCM_VECTOR_LENGTH (args) - 1; i >= 0; i--) |
0f2d19dd | 4908 | { |
d9c393f5 JB |
4909 | if (SCM_IMP (ve[i])) |
4910 | return res; | |
0f2d19dd | 4911 | arg1 = scm_cons (SCM_CAR (ve[i]), arg1); |
34d19ef6 | 4912 | SCM_VECTOR_SET (args, i, SCM_CDR (ve[i])); |
0f2d19dd | 4913 | } |
8ea46249 | 4914 | *pres = scm_list_1 (scm_apply (proc, arg1, SCM_EOL)); |
a23afe53 | 4915 | pres = SCM_CDRLOC (*pres); |
0f2d19dd JB |
4916 | } |
4917 | } | |
af45e3b0 | 4918 | #undef FUNC_NAME |
0f2d19dd JB |
4919 | |
4920 | ||
47c3f06d | 4921 | SCM_GPROC (s_for_each, "for-each", 2, 0, 1, scm_for_each, g_for_each); |
1cc91f1b | 4922 | |
0f2d19dd | 4923 | SCM |
1bbd0b84 | 4924 | scm_for_each (SCM proc, SCM arg1, SCM args) |
af45e3b0 | 4925 | #define FUNC_NAME s_for_each |
0f2d19dd | 4926 | { |
34d19ef6 | 4927 | SCM const *ve = &args; /* Keep args from being optimized away. */ |
c014a02e | 4928 | long i, len; |
d9c393f5 | 4929 | len = scm_ilength (arg1); |
47c3f06d MD |
4930 | SCM_GASSERTn (len >= 0, g_for_each, scm_cons2 (proc, arg1, args), |
4931 | SCM_ARG2, s_for_each); | |
af45e3b0 | 4932 | SCM_VALIDATE_REST_ARGUMENT (args); |
c96d76b8 | 4933 | if (SCM_NULLP (args)) |
0f2d19dd | 4934 | { |
504d99c5 MD |
4935 | scm_t_trampoline_1 call = scm_trampoline_1 (proc); |
4936 | SCM_GASSERT2 (call, g_for_each, proc, arg1, SCM_ARG1, s_for_each); | |
4937 | while (SCM_NIMP (arg1)) | |
4938 | { | |
4939 | call (proc, SCM_CAR (arg1)); | |
4940 | arg1 = SCM_CDR (arg1); | |
4941 | } | |
4942 | return SCM_UNSPECIFIED; | |
4943 | } | |
4944 | if (SCM_NULLP (SCM_CDR (args))) | |
4945 | { | |
4946 | SCM arg2 = SCM_CAR (args); | |
4947 | int len2 = scm_ilength (arg2); | |
4948 | scm_t_trampoline_2 call = scm_trampoline_2 (proc); | |
4949 | SCM_GASSERTn (call, g_for_each, | |
4950 | scm_cons2 (proc, arg1, args), SCM_ARG1, s_for_each); | |
4951 | SCM_GASSERTn (len2 >= 0, g_for_each, | |
4952 | scm_cons2 (proc, arg1, args), SCM_ARG3, s_for_each); | |
4953 | if (len2 != len) | |
4954 | SCM_OUT_OF_RANGE (3, arg2); | |
c96d76b8 | 4955 | while (SCM_NIMP (arg1)) |
0f2d19dd | 4956 | { |
504d99c5 | 4957 | call (proc, SCM_CAR (arg1), SCM_CAR (arg2)); |
0f2d19dd | 4958 | arg1 = SCM_CDR (arg1); |
504d99c5 | 4959 | arg2 = SCM_CDR (arg2); |
0f2d19dd JB |
4960 | } |
4961 | return SCM_UNSPECIFIED; | |
4962 | } | |
05b15362 DH |
4963 | arg1 = scm_cons (arg1, args); |
4964 | args = scm_vector (arg1); | |
0f2d19dd | 4965 | ve = SCM_VELTS (args); |
47c3f06d | 4966 | check_map_args (args, len, g_for_each, proc, arg1, s_for_each); |
0f2d19dd JB |
4967 | while (1) |
4968 | { | |
4969 | arg1 = SCM_EOL; | |
b5c2579a | 4970 | for (i = SCM_VECTOR_LENGTH (args) - 1; i >= 0; i--) |
0f2d19dd | 4971 | { |
c96d76b8 NJ |
4972 | if (SCM_IMP (ve[i])) |
4973 | return SCM_UNSPECIFIED; | |
0f2d19dd | 4974 | arg1 = scm_cons (SCM_CAR (ve[i]), arg1); |
34d19ef6 | 4975 | SCM_VECTOR_SET (args, i, SCM_CDR (ve[i])); |
0f2d19dd JB |
4976 | } |
4977 | scm_apply (proc, arg1, SCM_EOL); | |
4978 | } | |
4979 | } | |
af45e3b0 | 4980 | #undef FUNC_NAME |
0f2d19dd | 4981 | |
1cc91f1b | 4982 | |
0f2d19dd | 4983 | SCM |
6e8d25a6 | 4984 | scm_closure (SCM code, SCM env) |
0f2d19dd | 4985 | { |
16d4699b MV |
4986 | SCM z; |
4987 | SCM closcar = scm_cons (code, SCM_EOL); | |
228a24ef | 4988 | z = scm_cell (SCM_UNPACK (closcar) + scm_tc3_closure, (scm_t_bits) env); |
16d4699b | 4989 | scm_remember_upto_here (closcar); |
0f2d19dd JB |
4990 | return z; |
4991 | } | |
4992 | ||
4993 | ||
92c2555f | 4994 | scm_t_bits scm_tc16_promise; |
1cc91f1b | 4995 | |
0f2d19dd | 4996 | SCM |
6e8d25a6 | 4997 | scm_makprom (SCM code) |
0f2d19dd | 4998 | { |
28d52ebb MD |
4999 | SCM_RETURN_NEWSMOB2 (scm_tc16_promise, |
5000 | SCM_UNPACK (code), | |
5001 | scm_make_rec_mutex ()); | |
0f2d19dd JB |
5002 | } |
5003 | ||
28d52ebb MD |
5004 | static size_t |
5005 | promise_free (SCM promise) | |
5006 | { | |
5007 | scm_rec_mutex_free (SCM_PROMISE_MUTEX (promise)); | |
5008 | return 0; | |
5009 | } | |
1cc91f1b | 5010 | |
0f2d19dd | 5011 | static int |
e841c3e0 | 5012 | promise_print (SCM exp, SCM port, scm_print_state *pstate) |
0f2d19dd | 5013 | { |
19402679 | 5014 | int writingp = SCM_WRITINGP (pstate); |
b7f3516f | 5015 | scm_puts ("#<promise ", port); |
19402679 | 5016 | SCM_SET_WRITINGP (pstate, 1); |
28d52ebb | 5017 | scm_iprin1 (SCM_PROMISE_DATA (exp), port, pstate); |
19402679 | 5018 | SCM_SET_WRITINGP (pstate, writingp); |
b7f3516f | 5019 | scm_putc ('>', port); |
0f2d19dd JB |
5020 | return !0; |
5021 | } | |
5022 | ||
3b3b36dd | 5023 | SCM_DEFINE (scm_force, "force", 1, 0, 0, |
28d52ebb | 5024 | (SCM promise), |
67e8151b MG |
5025 | "If the promise @var{x} has not been computed yet, compute and\n" |
5026 | "return @var{x}, otherwise just return the previously computed\n" | |
5027 | "value.") | |
1bbd0b84 | 5028 | #define FUNC_NAME s_scm_force |
0f2d19dd | 5029 | { |
28d52ebb MD |
5030 | SCM_VALIDATE_SMOB (1, promise, promise); |
5031 | scm_rec_mutex_lock (SCM_PROMISE_MUTEX (promise)); | |
5032 | if (!SCM_PROMISE_COMPUTED_P (promise)) | |
0f2d19dd | 5033 | { |
28d52ebb MD |
5034 | SCM ans = scm_call_0 (SCM_PROMISE_DATA (promise)); |
5035 | if (!SCM_PROMISE_COMPUTED_P (promise)) | |
0f2d19dd | 5036 | { |
28d52ebb MD |
5037 | SCM_SET_PROMISE_DATA (promise, ans); |
5038 | SCM_SET_PROMISE_COMPUTED (promise); | |
0f2d19dd JB |
5039 | } |
5040 | } | |
28d52ebb MD |
5041 | scm_rec_mutex_unlock (SCM_PROMISE_MUTEX (promise)); |
5042 | return SCM_PROMISE_DATA (promise); | |
0f2d19dd | 5043 | } |
1bbd0b84 | 5044 | #undef FUNC_NAME |
0f2d19dd | 5045 | |
445f675c | 5046 | |
a1ec6916 | 5047 | SCM_DEFINE (scm_promise_p, "promise?", 1, 0, 0, |
67e8151b | 5048 | (SCM obj), |
b380b885 | 5049 | "Return true if @var{obj} is a promise, i.e. a delayed computation\n" |
7a095584 | 5050 | "(@pxref{Delayed evaluation,,,r5rs.info,The Revised^5 Report on Scheme}).") |
1bbd0b84 | 5051 | #define FUNC_NAME s_scm_promise_p |
0f2d19dd | 5052 | { |
67e8151b | 5053 | return SCM_BOOL (SCM_TYP16_PREDICATE (scm_tc16_promise, obj)); |
0f2d19dd | 5054 | } |
1bbd0b84 | 5055 | #undef FUNC_NAME |
0f2d19dd | 5056 | |
445f675c | 5057 | |
a1ec6916 | 5058 | SCM_DEFINE (scm_cons_source, "cons-source", 3, 0, 0, |
1bbd0b84 | 5059 | (SCM xorig, SCM x, SCM y), |
11768c04 NJ |
5060 | "Create and return a new pair whose car and cdr are @var{x} and @var{y}.\n" |
5061 | "Any source properties associated with @var{xorig} are also associated\n" | |
5062 | "with the new pair.") | |
1bbd0b84 | 5063 | #define FUNC_NAME s_scm_cons_source |
26d5b9b4 MD |
5064 | { |
5065 | SCM p, z; | |
16d4699b | 5066 | z = scm_cons (x, y); |
26d5b9b4 MD |
5067 | /* Copy source properties possibly associated with xorig. */ |
5068 | p = scm_whash_lookup (scm_source_whash, xorig); | |
445f675c | 5069 | if (!SCM_IMP (p)) |
26d5b9b4 MD |
5070 | scm_whash_insert (scm_source_whash, z, p); |
5071 | return z; | |
5072 | } | |
1bbd0b84 | 5073 | #undef FUNC_NAME |
26d5b9b4 | 5074 | |
445f675c | 5075 | |
a1ec6916 | 5076 | SCM_DEFINE (scm_copy_tree, "copy-tree", 1, 0, 0, |
1bbd0b84 | 5077 | (SCM obj), |
b380b885 MD |
5078 | "Recursively copy the data tree that is bound to @var{obj}, and return a\n" |
5079 | "pointer to the new data structure. @code{copy-tree} recurses down the\n" | |
5080 | "contents of both pairs and vectors (since both cons cells and vector\n" | |
5081 | "cells may point to arbitrary objects), and stops recursing when it hits\n" | |
5082 | "any other object.") | |
1bbd0b84 | 5083 | #define FUNC_NAME s_scm_copy_tree |
0f2d19dd JB |
5084 | { |
5085 | SCM ans, tl; | |
26d5b9b4 | 5086 | if (SCM_IMP (obj)) |
ff467021 | 5087 | return obj; |
3910272e MD |
5088 | if (SCM_VECTORP (obj)) |
5089 | { | |
c014a02e | 5090 | unsigned long i = SCM_VECTOR_LENGTH (obj); |
00ffa0e7 | 5091 | ans = scm_c_make_vector (i, SCM_UNSPECIFIED); |
3910272e | 5092 | while (i--) |
34d19ef6 | 5093 | SCM_VECTOR_SET (ans, i, scm_copy_tree (SCM_VELTS (obj)[i])); |
3910272e MD |
5094 | return ans; |
5095 | } | |
01f11e02 | 5096 | if (!SCM_CONSP (obj)) |
0f2d19dd | 5097 | return obj; |
26d5b9b4 MD |
5098 | ans = tl = scm_cons_source (obj, |
5099 | scm_copy_tree (SCM_CAR (obj)), | |
5100 | SCM_UNSPECIFIED); | |
05b15362 | 5101 | for (obj = SCM_CDR (obj); SCM_CONSP (obj); obj = SCM_CDR (obj)) |
a23afe53 MD |
5102 | { |
5103 | SCM_SETCDR (tl, scm_cons (scm_copy_tree (SCM_CAR (obj)), | |
5104 | SCM_UNSPECIFIED)); | |
5105 | tl = SCM_CDR (tl); | |
5106 | } | |
5107 | SCM_SETCDR (tl, obj); | |
0f2d19dd JB |
5108 | return ans; |
5109 | } | |
1bbd0b84 | 5110 | #undef FUNC_NAME |
0f2d19dd | 5111 | |
1cc91f1b | 5112 | |
4163eb72 MV |
5113 | /* We have three levels of EVAL here: |
5114 | ||
5115 | - scm_i_eval (exp, env) | |
5116 | ||
5117 | evaluates EXP in environment ENV. ENV is a lexical environment | |
5118 | structure as used by the actual tree code evaluator. When ENV is | |
5119 | a top-level environment, then changes to the current module are | |
a513ead3 | 5120 | tracked by updating ENV so that it continues to be in sync with |
4163eb72 MV |
5121 | the current module. |
5122 | ||
5123 | - scm_primitive_eval (exp) | |
5124 | ||
5125 | evaluates EXP in the top-level environment as determined by the | |
5126 | current module. This is done by constructing a suitable | |
5127 | environment and calling scm_i_eval. Thus, changes to the | |
5128 | top-level module are tracked normally. | |
5129 | ||
5130 | - scm_eval (exp, mod) | |
5131 | ||
a513ead3 | 5132 | evaluates EXP while MOD is the current module. This is done by |
4163eb72 MV |
5133 | setting the current module to MOD, invoking scm_primitive_eval on |
5134 | EXP, and then restoring the current module to the value it had | |
5135 | previously. That is, while EXP is evaluated, changes to the | |
5136 | current module are tracked, but these changes do not persist when | |
5137 | scm_eval returns. | |
5138 | ||
5139 | For each level of evals, there are two variants, distinguished by a | |
5140 | _x suffix: the ordinary variant does not modify EXP while the _x | |
5141 | variant can destructively modify EXP into something completely | |
5142 | unintelligible. A Scheme data structure passed as EXP to one of the | |
5143 | _x variants should not ever be used again for anything. So when in | |
5144 | doubt, use the ordinary variant. | |
5145 | ||
5146 | */ | |
5147 | ||
0f2d19dd | 5148 | SCM |
68d8be66 | 5149 | scm_i_eval_x (SCM exp, SCM env) |
0f2d19dd | 5150 | { |
68d8be66 | 5151 | return SCM_XEVAL (exp, env); |
0f2d19dd JB |
5152 | } |
5153 | ||
68d8be66 MD |
5154 | SCM |
5155 | scm_i_eval (SCM exp, SCM env) | |
5156 | { | |
26fb6390 | 5157 | exp = scm_copy_tree (exp); |
e37a4fba | 5158 | return SCM_XEVAL (exp, env); |
68d8be66 MD |
5159 | } |
5160 | ||
5161 | SCM | |
4163eb72 | 5162 | scm_primitive_eval_x (SCM exp) |
0f2d19dd | 5163 | { |
a513ead3 | 5164 | SCM env; |
bcdab802 | 5165 | SCM transformer = scm_current_module_transformer (); |
a513ead3 | 5166 | if (SCM_NIMP (transformer)) |
fdc28395 | 5167 | exp = scm_call_1 (transformer, exp); |
a513ead3 | 5168 | env = scm_top_level_env (scm_current_module_lookup_closure ()); |
4163eb72 | 5169 | return scm_i_eval_x (exp, env); |
0f2d19dd JB |
5170 | } |
5171 | ||
4163eb72 MV |
5172 | SCM_DEFINE (scm_primitive_eval, "primitive-eval", 1, 0, 0, |
5173 | (SCM exp), | |
2069af38 | 5174 | "Evaluate @var{exp} in the top-level environment specified by\n" |
4163eb72 MV |
5175 | "the current module.") |
5176 | #define FUNC_NAME s_scm_primitive_eval | |
5177 | { | |
a513ead3 | 5178 | SCM env; |
bcdab802 | 5179 | SCM transformer = scm_current_module_transformer (); |
a513ead3 | 5180 | if (SCM_NIMP (transformer)) |
fdc28395 | 5181 | exp = scm_call_1 (transformer, exp); |
a513ead3 | 5182 | env = scm_top_level_env (scm_current_module_lookup_closure ()); |
4163eb72 MV |
5183 | return scm_i_eval (exp, env); |
5184 | } | |
5185 | #undef FUNC_NAME | |
5186 | ||
68d8be66 MD |
5187 | /* Eval does not take the second arg optionally. This is intentional |
5188 | * in order to be R5RS compatible, and to prepare for the new module | |
5189 | * system, where we would like to make the choice of evaluation | |
4163eb72 | 5190 | * environment explicit. */ |
549e6ec6 | 5191 | |
09074dbf DH |
5192 | static void |
5193 | change_environment (void *data) | |
5194 | { | |
5195 | SCM pair = SCM_PACK (data); | |
5196 | SCM new_module = SCM_CAR (pair); | |
aa767bc5 | 5197 | SCM old_module = scm_current_module (); |
09074dbf | 5198 | SCM_SETCDR (pair, old_module); |
aa767bc5 | 5199 | scm_set_current_module (new_module); |
09074dbf DH |
5200 | } |
5201 | ||
5202 | ||
09074dbf DH |
5203 | static void |
5204 | restore_environment (void *data) | |
5205 | { | |
5206 | SCM pair = SCM_PACK (data); | |
5207 | SCM old_module = SCM_CDR (pair); | |
aa767bc5 | 5208 | SCM new_module = scm_current_module (); |
2e9c835d | 5209 | SCM_SETCAR (pair, new_module); |
aa767bc5 | 5210 | scm_set_current_module (old_module); |
09074dbf DH |
5211 | } |
5212 | ||
4163eb72 MV |
5213 | static SCM |
5214 | inner_eval_x (void *data) | |
5215 | { | |
5216 | return scm_primitive_eval_x (SCM_PACK(data)); | |
5217 | } | |
5218 | ||
5219 | SCM | |
5220 | scm_eval_x (SCM exp, SCM module) | |
5221 | #define FUNC_NAME "eval!" | |
5222 | { | |
5223 | SCM_VALIDATE_MODULE (2, module); | |
5224 | ||
5225 | return scm_internal_dynamic_wind | |
5226 | (change_environment, inner_eval_x, restore_environment, | |
5227 | (void *) SCM_UNPACK (exp), | |
5228 | (void *) SCM_UNPACK (scm_cons (module, SCM_BOOL_F))); | |
5229 | } | |
5230 | #undef FUNC_NAME | |
5231 | ||
5232 | static SCM | |
5233 | inner_eval (void *data) | |
5234 | { | |
5235 | return scm_primitive_eval (SCM_PACK(data)); | |
5236 | } | |
09074dbf | 5237 | |
68d8be66 | 5238 | SCM_DEFINE (scm_eval, "eval", 2, 0, 0, |
4163eb72 MV |
5239 | (SCM exp, SCM module), |
5240 | "Evaluate @var{exp}, a list representing a Scheme expression,\n" | |
5241 | "in the top-level environment specified by @var{module}.\n" | |
8f85c0c6 | 5242 | "While @var{exp} is evaluated (using @code{primitive-eval}),\n" |
4163eb72 MV |
5243 | "@var{module} is made the current module. The current module\n" |
5244 | "is reset to its previous value when @var{eval} returns.") | |
1bbd0b84 | 5245 | #define FUNC_NAME s_scm_eval |
0f2d19dd | 5246 | { |
4163eb72 | 5247 | SCM_VALIDATE_MODULE (2, module); |
09074dbf DH |
5248 | |
5249 | return scm_internal_dynamic_wind | |
5250 | (change_environment, inner_eval, restore_environment, | |
4163eb72 MV |
5251 | (void *) SCM_UNPACK (exp), |
5252 | (void *) SCM_UNPACK (scm_cons (module, SCM_BOOL_F))); | |
0f2d19dd | 5253 | } |
1bbd0b84 | 5254 | #undef FUNC_NAME |
0f2d19dd | 5255 | |
6dbd0af5 MD |
5256 | |
5257 | /* At this point, scm_deval and scm_dapply are generated. | |
5258 | */ | |
5259 | ||
a44a9715 DH |
5260 | #define DEVAL |
5261 | #include "eval.c" | |
0f2d19dd | 5262 | |
1cc91f1b | 5263 | |
0f2d19dd JB |
5264 | void |
5265 | scm_init_eval () | |
0f2d19dd | 5266 | { |
33b97402 MD |
5267 | scm_init_opts (scm_evaluator_traps, |
5268 | scm_evaluator_trap_table, | |
5269 | SCM_N_EVALUATOR_TRAPS); | |
5270 | scm_init_opts (scm_eval_options_interface, | |
5271 | scm_eval_opts, | |
5272 | SCM_N_EVAL_OPTIONS); | |
5273 | ||
f99c9c28 MD |
5274 | scm_tc16_promise = scm_make_smob_type ("promise", 0); |
5275 | scm_set_smob_mark (scm_tc16_promise, scm_markcdr); | |
28d52ebb | 5276 | scm_set_smob_free (scm_tc16_promise, promise_free); |
e841c3e0 | 5277 | scm_set_smob_print (scm_tc16_promise, promise_print); |
b8229a3b | 5278 | |
a44a9715 DH |
5279 | undefineds = scm_list_1 (SCM_UNDEFINED); |
5280 | SCM_SETCDR (undefineds, undefineds); | |
5281 | scm_permanent_object (undefineds); | |
7c33806a | 5282 | |
a44a9715 | 5283 | scm_listofnull = scm_list_1 (SCM_EOL); |
0f2d19dd | 5284 | |
a44a9715 DH |
5285 | f_apply = scm_c_define_subr ("apply", scm_tc7_lsubr_2, scm_apply); |
5286 | scm_permanent_object (f_apply); | |
86d31dfe | 5287 | |
a0599745 | 5288 | #include "libguile/eval.x" |
60a49842 | 5289 | |
25eaf21a | 5290 | scm_add_feature ("delay"); |
0f2d19dd | 5291 | } |
0f2d19dd | 5292 | |
6dbd0af5 | 5293 | #endif /* !DEVAL */ |
89e00824 ML |
5294 | |
5295 | /* | |
5296 | Local Variables: | |
5297 | c-file-style: "gnu" | |
5298 | End: | |
5299 | */ |