Commit | Line | Data |
---|---|---|
db9f0278 | 1 | /* Evaluator for GNU Emacs Lisp interpreter. |
ab422c4d PE |
2 | Copyright (C) 1985-1987, 1993-1995, 1999-2013 Free Software |
3 | Foundation, Inc. | |
db9f0278 JB |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
9ec0b715 | 7 | GNU Emacs is free software: you can redistribute it and/or modify |
db9f0278 | 8 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
9 | the Free Software Foundation, either version 3 of the License, or |
10 | (at your option) any later version. | |
db9f0278 JB |
11 | |
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
9ec0b715 | 18 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
db9f0278 JB |
19 | |
20 | ||
18160b98 | 21 | #include <config.h> |
eb3f1cc8 | 22 | #include <limits.h> |
4e2fe2e6 | 23 | #include <stdio.h> |
db9f0278 | 24 | #include "lisp.h" |
9ac0d9e0 | 25 | #include "blockinput.h" |
db9f0278 | 26 | #include "commands.h" |
1f98fa48 | 27 | #include "keyboard.h" |
3648c842 | 28 | #include "dispextern.h" |
94b612ad | 29 | #include "frame.h" /* For XFRAME. */ |
db9f0278 | 30 | |
b70e1a2b SM |
31 | #if HAVE_X_WINDOWS |
32 | #include "xterm.h" | |
33 | #endif | |
34 | ||
244ed907 PE |
35 | #if !BYTE_MARK_STACK |
36 | static | |
37 | #endif | |
db9f0278 JB |
38 | struct catchtag *catchlist; |
39 | ||
244ed907 PE |
40 | /* Chain of condition handlers currently in effect. |
41 | The elements of this chain are contained in the stack frames | |
42 | of Fcondition_case and internal_condition_case. | |
43 | When an error is signaled (by calling Fsignal, below), | |
44 | this chain is searched for an element that applies. */ | |
45 | ||
46 | #if !BYTE_MARK_STACK | |
47 | static | |
48 | #endif | |
49 | struct handler *handlerlist; | |
50 | ||
15934ffa RS |
51 | #ifdef DEBUG_GCPRO |
52 | /* Count levels of GCPRO to detect failure to UNGCPRO. */ | |
53 | int gcpro_level; | |
54 | #endif | |
55 | ||
61b108cc | 56 | Lisp_Object Qautoload, Qmacro, Qexit, Qinteractive, Qcommandp; |
29208e82 | 57 | Lisp_Object Qinhibit_quit; |
955cbe7b PE |
58 | Lisp_Object Qand_rest; |
59 | static Lisp_Object Qand_optional; | |
45b82ad0 | 60 | static Lisp_Object Qinhibit_debugger; |
955cbe7b | 61 | static Lisp_Object Qdeclare; |
b9598260 SM |
62 | Lisp_Object Qinternal_interpreter_environment, Qclosure; |
63 | ||
ed008a6d | 64 | static Lisp_Object Qdebug; |
db9f0278 | 65 | |
6e6e9f08 RS |
66 | /* This holds either the symbol `run-hooks' or nil. |
67 | It is nil at an early stage of startup, and when Emacs | |
68 | is shutting down. */ | |
4c576a83 | 69 | |
db9f0278 JB |
70 | Lisp_Object Vrun_hooks; |
71 | ||
72 | /* Non-nil means record all fset's and provide's, to be undone | |
73 | if the file being autoloaded is not fully loaded. | |
74 | They are recorded by being consed onto the front of Vautoload_queue: | |
47b82df9 | 75 | (FUN . ODEF) for a defun, (0 . OFEATURES) for a provide. */ |
db9f0278 JB |
76 | |
77 | Lisp_Object Vautoload_queue; | |
78 | ||
9349e5f7 PE |
79 | /* Current number of specbindings allocated in specpdl, not counting |
80 | the dummy entry specpdl[-1]. */ | |
4c576a83 | 81 | |
d311d28c | 82 | ptrdiff_t specpdl_size; |
db9f0278 | 83 | |
9349e5f7 PE |
84 | /* Pointer to beginning of specpdl. A dummy entry specpdl[-1] exists |
85 | only so that its address can be taken. */ | |
4c576a83 | 86 | |
9349e5f7 | 87 | union specbinding *specpdl; |
db9f0278 JB |
88 | |
89 | /* Pointer to first unused element in specpdl. */ | |
4c576a83 | 90 | |
9349e5f7 | 91 | union specbinding *specpdl_ptr; |
db9f0278 | 92 | |
db9f0278 | 93 | /* Depth in Lisp evaluations and function calls. */ |
4c576a83 | 94 | |
57a96f5c | 95 | static EMACS_INT lisp_eval_depth; |
db9f0278 | 96 | |
be857679 | 97 | /* The value of num_nonmacro_input_events as of the last time we |
82da7701 | 98 | started to enter the debugger. If we decide to enter the debugger |
be857679 | 99 | again when this is still equal to num_nonmacro_input_events, then we |
82da7701 JB |
100 | know that the debugger itself has an error, and we should just |
101 | signal the error instead of entering an infinite loop of debugger | |
102 | invocations. */ | |
4c576a83 | 103 | |
d311d28c | 104 | static EMACS_INT when_entered_debugger; |
db9f0278 | 105 | |
a2ff3819 GM |
106 | /* The function from which the last `signal' was called. Set in |
107 | Fsignal. */ | |
2f592f95 | 108 | /* FIXME: We should probably get rid of this! */ |
a2ff3819 GM |
109 | Lisp_Object Vsignaling_function; |
110 | ||
d1f55f16 CY |
111 | /* If non-nil, Lisp code must not be run since some part of Emacs is |
112 | in an inconsistent state. Currently, x-create-frame uses this to | |
113 | avoid triggering window-configuration-change-hook while the new | |
114 | frame is half-initialized. */ | |
115 | Lisp_Object inhibit_lisp_code; | |
116 | ||
f66c7cf8 | 117 | static Lisp_Object funcall_lambda (Lisp_Object, ptrdiff_t, Lisp_Object *); |
7200d79c | 118 | static Lisp_Object apply_lambda (Lisp_Object fun, Lisp_Object args); |
e46f2325 | 119 | |
84575e67 | 120 | static Lisp_Object |
9349e5f7 | 121 | specpdl_symbol (union specbinding *pdl) |
84575e67 PE |
122 | { |
123 | eassert (pdl->kind >= SPECPDL_LET); | |
9349e5f7 | 124 | return pdl->let.symbol; |
84575e67 PE |
125 | } |
126 | ||
127 | static Lisp_Object | |
9349e5f7 | 128 | specpdl_old_value (union specbinding *pdl) |
84575e67 PE |
129 | { |
130 | eassert (pdl->kind >= SPECPDL_LET); | |
9349e5f7 | 131 | return pdl->let.old_value; |
84575e67 PE |
132 | } |
133 | ||
134 | static Lisp_Object | |
9349e5f7 | 135 | specpdl_where (union specbinding *pdl) |
84575e67 PE |
136 | { |
137 | eassert (pdl->kind > SPECPDL_LET); | |
9349e5f7 | 138 | return pdl->let.where; |
84575e67 PE |
139 | } |
140 | ||
141 | static Lisp_Object | |
9349e5f7 | 142 | specpdl_arg (union specbinding *pdl) |
84575e67 PE |
143 | { |
144 | eassert (pdl->kind == SPECPDL_UNWIND); | |
9349e5f7 | 145 | return pdl->unwind.arg; |
84575e67 PE |
146 | } |
147 | ||
148 | static specbinding_func | |
9349e5f7 | 149 | specpdl_func (union specbinding *pdl) |
84575e67 PE |
150 | { |
151 | eassert (pdl->kind == SPECPDL_UNWIND); | |
9349e5f7 | 152 | return pdl->unwind.func; |
84575e67 PE |
153 | } |
154 | ||
155 | static Lisp_Object | |
9349e5f7 | 156 | backtrace_function (union specbinding *pdl) |
84575e67 PE |
157 | { |
158 | eassert (pdl->kind == SPECPDL_BACKTRACE); | |
9349e5f7 | 159 | return pdl->bt.function; |
84575e67 PE |
160 | } |
161 | ||
162 | static ptrdiff_t | |
9349e5f7 | 163 | backtrace_nargs (union specbinding *pdl) |
84575e67 PE |
164 | { |
165 | eassert (pdl->kind == SPECPDL_BACKTRACE); | |
9349e5f7 | 166 | return pdl->bt.nargs; |
84575e67 PE |
167 | } |
168 | ||
169 | static Lisp_Object * | |
9349e5f7 | 170 | backtrace_args (union specbinding *pdl) |
84575e67 PE |
171 | { |
172 | eassert (pdl->kind == SPECPDL_BACKTRACE); | |
9349e5f7 | 173 | return pdl->bt.args; |
84575e67 PE |
174 | } |
175 | ||
176 | static bool | |
9349e5f7 | 177 | backtrace_debug_on_exit (union specbinding *pdl) |
84575e67 PE |
178 | { |
179 | eassert (pdl->kind == SPECPDL_BACKTRACE); | |
9349e5f7 | 180 | return pdl->bt.debug_on_exit; |
84575e67 PE |
181 | } |
182 | ||
2f592f95 | 183 | /* Functions to modify slots of backtrace records. */ |
e46f2325 | 184 | |
3d5ee10a | 185 | static void |
9349e5f7 PE |
186 | set_backtrace_args (union specbinding *pdl, Lisp_Object *args) |
187 | { | |
188 | eassert (pdl->kind == SPECPDL_BACKTRACE); | |
189 | pdl->bt.args = args; | |
190 | } | |
2f592f95 | 191 | |
3d5ee10a | 192 | static void |
9349e5f7 PE |
193 | set_backtrace_nargs (union specbinding *pdl, ptrdiff_t n) |
194 | { | |
195 | eassert (pdl->kind == SPECPDL_BACKTRACE); | |
196 | pdl->bt.nargs = n; | |
197 | } | |
2f592f95 | 198 | |
3d5ee10a | 199 | static void |
9349e5f7 PE |
200 | set_backtrace_debug_on_exit (union specbinding *pdl, bool doe) |
201 | { | |
202 | eassert (pdl->kind == SPECPDL_BACKTRACE); | |
203 | pdl->bt.debug_on_exit = doe; | |
204 | } | |
2f592f95 SM |
205 | |
206 | /* Helper functions to scan the backtrace. */ | |
207 | ||
9349e5f7 PE |
208 | bool backtrace_p (union specbinding *) EXTERNALLY_VISIBLE; |
209 | union specbinding *backtrace_top (void) EXTERNALLY_VISIBLE; | |
210 | union specbinding *backtrace_next (union specbinding *pdl) EXTERNALLY_VISIBLE; | |
3d5ee10a | 211 | |
9349e5f7 PE |
212 | bool |
213 | backtrace_p (union specbinding *pdl) | |
2f592f95 | 214 | { return pdl >= specpdl; } |
a8a7c5f6 | 215 | |
9349e5f7 | 216 | union specbinding * |
3d5ee10a | 217 | backtrace_top (void) |
e46f2325 | 218 | { |
9349e5f7 | 219 | union specbinding *pdl = specpdl_ptr - 1; |
a8a7c5f6 | 220 | while (backtrace_p (pdl) && pdl->kind != SPECPDL_BACKTRACE) |
2f592f95 SM |
221 | pdl--; |
222 | return pdl; | |
e46f2325 | 223 | } |
a8a7c5f6 | 224 | |
9349e5f7 PE |
225 | union specbinding * |
226 | backtrace_next (union specbinding *pdl) | |
e46f2325 | 227 | { |
2f592f95 SM |
228 | pdl--; |
229 | while (backtrace_p (pdl) && pdl->kind != SPECPDL_BACKTRACE) | |
230 | pdl--; | |
231 | return pdl; | |
e46f2325 DA |
232 | } |
233 | ||
2f592f95 | 234 | |
dfcf069d | 235 | void |
d3da34e0 | 236 | init_eval_once (void) |
db9f0278 | 237 | { |
98e8eae1 | 238 | enum { size = 50 }; |
9349e5f7 | 239 | union specbinding *pdlvec = xmalloc ((size + 1) * sizeof *specpdl); |
98e8eae1 | 240 | specpdl_size = size; |
9349e5f7 | 241 | specpdl = specpdl_ptr = pdlvec + 1; |
6588243d | 242 | /* Don't forget to update docs (lispref node "Local Variables"). */ |
c530e1c2 | 243 | max_specpdl_size = 1300; /* 1000 is not enough for CEDET's c-by.el. */ |
d46f6bbb | 244 | max_lisp_eval_depth = 600; |
34d470ba RS |
245 | |
246 | Vrun_hooks = Qnil; | |
db9f0278 JB |
247 | } |
248 | ||
dfcf069d | 249 | void |
d3da34e0 | 250 | init_eval (void) |
db9f0278 JB |
251 | { |
252 | specpdl_ptr = specpdl; | |
253 | catchlist = 0; | |
254 | handlerlist = 0; | |
db9f0278 JB |
255 | Vquit_flag = Qnil; |
256 | debug_on_next_call = 0; | |
257 | lisp_eval_depth = 0; | |
87e21fbd | 258 | #ifdef DEBUG_GCPRO |
15934ffa | 259 | gcpro_level = 0; |
87e21fbd | 260 | #endif |
be857679 | 261 | /* This is less than the initial value of num_nonmacro_input_events. */ |
b5b911f9 | 262 | when_entered_debugger = -1; |
db9f0278 JB |
263 | } |
264 | ||
f6d62986 | 265 | /* Unwind-protect function used by call_debugger. */ |
9f5903bb RS |
266 | |
267 | static Lisp_Object | |
d3da34e0 | 268 | restore_stack_limits (Lisp_Object data) |
9f5903bb RS |
269 | { |
270 | max_specpdl_size = XINT (XCAR (data)); | |
271 | max_lisp_eval_depth = XINT (XCDR (data)); | |
538f78c3 | 272 | return Qnil; |
9f5903bb RS |
273 | } |
274 | ||
275 | /* Call the Lisp debugger, giving it argument ARG. */ | |
276 | ||
7f7e0167 | 277 | Lisp_Object |
d3da34e0 | 278 | call_debugger (Lisp_Object arg) |
db9f0278 | 279 | { |
1882aa38 | 280 | bool debug_while_redisplaying; |
d311d28c | 281 | ptrdiff_t count = SPECPDL_INDEX (); |
3648c842 | 282 | Lisp_Object val; |
5816888b | 283 | EMACS_INT old_max = max_specpdl_size; |
177c0ea7 | 284 | |
9f5903bb RS |
285 | /* Temporarily bump up the stack limits, |
286 | so the debugger won't run out of stack. */ | |
177c0ea7 | 287 | |
9f5903bb RS |
288 | max_specpdl_size += 1; |
289 | record_unwind_protect (restore_stack_limits, | |
290 | Fcons (make_number (old_max), | |
291 | make_number (max_lisp_eval_depth))); | |
292 | max_specpdl_size = old_max; | |
293 | ||
294 | if (lisp_eval_depth + 40 > max_lisp_eval_depth) | |
295 | max_lisp_eval_depth = lisp_eval_depth + 40; | |
296 | ||
98e8eae1 | 297 | if (max_specpdl_size - 100 < SPECPDL_INDEX ()) |
9f5903bb | 298 | max_specpdl_size = SPECPDL_INDEX () + 100; |
177c0ea7 | 299 | |
d148e14d | 300 | #ifdef HAVE_WINDOW_SYSTEM |
df6c90d8 GM |
301 | if (display_hourglass_p) |
302 | cancel_hourglass (); | |
237c23b0 GM |
303 | #endif |
304 | ||
db9f0278 | 305 | debug_on_next_call = 0; |
be857679 | 306 | when_entered_debugger = num_nonmacro_input_events; |
3648c842 GM |
307 | |
308 | /* Resetting redisplaying_p to 0 makes sure that debug output is | |
309 | displayed if the debugger is invoked during redisplay. */ | |
310 | debug_while_redisplaying = redisplaying_p; | |
311 | redisplaying_p = 0; | |
556d7314 GM |
312 | specbind (intern ("debugger-may-continue"), |
313 | debug_while_redisplaying ? Qnil : Qt); | |
8efb6cc7 | 314 | specbind (Qinhibit_redisplay, Qnil); |
45b82ad0 | 315 | specbind (Qinhibit_debugger, Qt); |
9db6f6b4 GM |
316 | |
317 | #if 0 /* Binding this prevents execution of Lisp code during | |
318 | redisplay, which necessarily leads to display problems. */ | |
8efb6cc7 | 319 | specbind (Qinhibit_eval_during_redisplay, Qt); |
9db6f6b4 | 320 | #endif |
177c0ea7 | 321 | |
3648c842 GM |
322 | val = apply1 (Vdebugger, arg); |
323 | ||
324 | /* Interrupting redisplay and resuming it later is not safe under | |
325 | all circumstances. So, when the debugger returns, abort the | |
1b1acc13 | 326 | interrupted redisplay by going back to the top-level. */ |
3648c842 GM |
327 | if (debug_while_redisplaying) |
328 | Ftop_level (); | |
329 | ||
556d7314 | 330 | return unbind_to (count, val); |
db9f0278 JB |
331 | } |
332 | ||
475545b5 | 333 | static void |
d3da34e0 | 334 | do_debug_on_call (Lisp_Object code) |
db9f0278 JB |
335 | { |
336 | debug_on_next_call = 0; | |
2f592f95 | 337 | set_backtrace_debug_on_exit (specpdl_ptr - 1, true); |
db9f0278 JB |
338 | call_debugger (Fcons (code, Qnil)); |
339 | } | |
340 | \f | |
341 | /* NOTE!!! Every function that can call EVAL must protect its args | |
342 | and temporaries from garbage collection while it needs them. | |
343 | The definition of `For' shows what you have to do. */ | |
344 | ||
345 | DEFUN ("or", For, Sor, 0, UNEVALLED, 0, | |
9dbc9081 PJ |
346 | doc: /* Eval args until one of them yields non-nil, then return that value. |
347 | The remaining args are not evalled at all. | |
348 | If all args return nil, return nil. | |
533eb34b | 349 | usage: (or CONDITIONS...) */) |
5842a27b | 350 | (Lisp_Object args) |
db9f0278 | 351 | { |
e509f168 | 352 | register Lisp_Object val = Qnil; |
db9f0278 JB |
353 | struct gcpro gcpro1; |
354 | ||
e509f168 | 355 | GCPRO1 (args); |
db9f0278 | 356 | |
e509f168 | 357 | while (CONSP (args)) |
db9f0278 | 358 | { |
defb1411 | 359 | val = eval_sub (XCAR (args)); |
265a9e55 | 360 | if (!NILP (val)) |
db9f0278 | 361 | break; |
e509f168 | 362 | args = XCDR (args); |
db9f0278 | 363 | } |
db9f0278 JB |
364 | |
365 | UNGCPRO; | |
366 | return val; | |
367 | } | |
368 | ||
369 | DEFUN ("and", Fand, Sand, 0, UNEVALLED, 0, | |
b8de5714 | 370 | doc: /* Eval args until one of them yields nil, then return nil. |
9dbc9081 PJ |
371 | The remaining args are not evalled at all. |
372 | If no arg yields nil, return the last arg's value. | |
533eb34b | 373 | usage: (and CONDITIONS...) */) |
5842a27b | 374 | (Lisp_Object args) |
db9f0278 | 375 | { |
e509f168 | 376 | register Lisp_Object val = Qt; |
db9f0278 JB |
377 | struct gcpro gcpro1; |
378 | ||
e509f168 | 379 | GCPRO1 (args); |
db9f0278 | 380 | |
e509f168 | 381 | while (CONSP (args)) |
db9f0278 | 382 | { |
defb1411 | 383 | val = eval_sub (XCAR (args)); |
265a9e55 | 384 | if (NILP (val)) |
db9f0278 | 385 | break; |
e509f168 | 386 | args = XCDR (args); |
db9f0278 | 387 | } |
db9f0278 JB |
388 | |
389 | UNGCPRO; | |
390 | return val; | |
391 | } | |
392 | ||
393 | DEFUN ("if", Fif, Sif, 2, UNEVALLED, 0, | |
b8de5714 | 394 | doc: /* If COND yields non-nil, do THEN, else do ELSE... |
9dbc9081 PJ |
395 | Returns the value of THEN or the value of the last of the ELSE's. |
396 | THEN must be one expression, but ELSE... can be zero or more expressions. | |
397 | If COND yields nil, and there are no ELSE's, the value is nil. | |
7a25dc6d | 398 | usage: (if COND THEN ELSE...) */) |
5842a27b | 399 | (Lisp_Object args) |
db9f0278 JB |
400 | { |
401 | register Lisp_Object cond; | |
402 | struct gcpro gcpro1; | |
403 | ||
404 | GCPRO1 (args); | |
defb1411 | 405 | cond = eval_sub (Fcar (args)); |
db9f0278 JB |
406 | UNGCPRO; |
407 | ||
265a9e55 | 408 | if (!NILP (cond)) |
defb1411 | 409 | return eval_sub (Fcar (Fcdr (args))); |
db9f0278 JB |
410 | return Fprogn (Fcdr (Fcdr (args))); |
411 | } | |
412 | ||
413 | DEFUN ("cond", Fcond, Scond, 0, UNEVALLED, 0, | |
9dbc9081 PJ |
414 | doc: /* Try each clause until one succeeds. |
415 | Each clause looks like (CONDITION BODY...). CONDITION is evaluated | |
416 | and, if the value is non-nil, this clause succeeds: | |
417 | then the expressions in BODY are evaluated and the last one's | |
418 | value is the value of the cond-form. | |
419 | If no clause succeeds, cond returns nil. | |
420 | If a clause has one element, as in (CONDITION), | |
421 | CONDITION's value if non-nil is returned from the cond-form. | |
7a25dc6d | 422 | usage: (cond CLAUSES...) */) |
5842a27b | 423 | (Lisp_Object args) |
db9f0278 JB |
424 | { |
425 | register Lisp_Object clause, val; | |
426 | struct gcpro gcpro1; | |
427 | ||
428 | val = Qnil; | |
429 | GCPRO1 (args); | |
265a9e55 | 430 | while (!NILP (args)) |
db9f0278 JB |
431 | { |
432 | clause = Fcar (args); | |
defb1411 | 433 | val = eval_sub (Fcar (clause)); |
265a9e55 | 434 | if (!NILP (val)) |
db9f0278 | 435 | { |
03699b14 KR |
436 | if (!EQ (XCDR (clause), Qnil)) |
437 | val = Fprogn (XCDR (clause)); | |
db9f0278 JB |
438 | break; |
439 | } | |
03699b14 | 440 | args = XCDR (args); |
db9f0278 JB |
441 | } |
442 | UNGCPRO; | |
443 | ||
444 | return val; | |
445 | } | |
446 | ||
a7ca3326 | 447 | DEFUN ("progn", Fprogn, Sprogn, 0, UNEVALLED, 0, |
9dbc9081 | 448 | doc: /* Eval BODY forms sequentially and return value of last one. |
5b4a1f50 | 449 | usage: (progn BODY...) */) |
5842a27b | 450 | (Lisp_Object args) |
db9f0278 | 451 | { |
e509f168 | 452 | register Lisp_Object val = Qnil; |
db9f0278 JB |
453 | struct gcpro gcpro1; |
454 | ||
e509f168 | 455 | GCPRO1 (args); |
db9f0278 | 456 | |
e509f168 | 457 | while (CONSP (args)) |
db9f0278 | 458 | { |
defb1411 | 459 | val = eval_sub (XCAR (args)); |
e509f168 | 460 | args = XCDR (args); |
db9f0278 | 461 | } |
db9f0278 JB |
462 | |
463 | UNGCPRO; | |
464 | return val; | |
465 | } | |
466 | ||
467 | DEFUN ("prog1", Fprog1, Sprog1, 1, UNEVALLED, 0, | |
bdee2ef3 | 468 | doc: /* Eval FIRST and BODY sequentially; return value from FIRST. |
9dbc9081 PJ |
469 | The value of FIRST is saved during the evaluation of the remaining args, |
470 | whose values are discarded. | |
7a25dc6d | 471 | usage: (prog1 FIRST BODY...) */) |
5842a27b | 472 | (Lisp_Object args) |
db9f0278 JB |
473 | { |
474 | Lisp_Object val; | |
475 | register Lisp_Object args_left; | |
476 | struct gcpro gcpro1, gcpro2; | |
db9f0278 JB |
477 | |
478 | args_left = args; | |
479 | val = Qnil; | |
480 | GCPRO2 (args, val); | |
481 | ||
856bbc81 PE |
482 | val = eval_sub (XCAR (args_left)); |
483 | while (CONSP (args_left = XCDR (args_left))) | |
484 | eval_sub (XCAR (args_left)); | |
db9f0278 JB |
485 | |
486 | UNGCPRO; | |
487 | return val; | |
488 | } | |
489 | ||
490 | DEFUN ("prog2", Fprog2, Sprog2, 2, UNEVALLED, 0, | |
bdee2ef3 | 491 | doc: /* Eval FORM1, FORM2 and BODY sequentially; return value from FORM2. |
82fc29a1 JB |
492 | The value of FORM2 is saved during the evaluation of the |
493 | remaining args, whose values are discarded. | |
494 | usage: (prog2 FORM1 FORM2 BODY...) */) | |
5842a27b | 495 | (Lisp_Object args) |
db9f0278 | 496 | { |
856bbc81 | 497 | struct gcpro gcpro1; |
db9f0278 | 498 | |
856bbc81 | 499 | GCPRO1 (args); |
856bbc81 | 500 | eval_sub (XCAR (args)); |
a63df926 PE |
501 | UNGCPRO; |
502 | return Fprog1 (XCDR (args)); | |
db9f0278 JB |
503 | } |
504 | ||
505 | DEFUN ("setq", Fsetq, Ssetq, 0, UNEVALLED, 0, | |
9dbc9081 PJ |
506 | doc: /* Set each SYM to the value of its VAL. |
507 | The symbols SYM are variables; they are literal (not evaluated). | |
508 | The values VAL are expressions; they are evaluated. | |
509 | Thus, (setq x (1+ y)) sets `x' to the value of `(1+ y)'. | |
510 | The second VAL is not computed until after the first SYM is set, and so on; | |
511 | each VAL can use the new value of variables set earlier in the `setq'. | |
512 | The return value of the `setq' form is the value of the last VAL. | |
819586b2 | 513 | usage: (setq [SYM VAL]...) */) |
5842a27b | 514 | (Lisp_Object args) |
db9f0278 JB |
515 | { |
516 | register Lisp_Object args_left; | |
b9598260 | 517 | register Lisp_Object val, sym, lex_binding; |
db9f0278 JB |
518 | struct gcpro gcpro1; |
519 | ||
1283140e | 520 | if (NILP (args)) |
db9f0278 JB |
521 | return Qnil; |
522 | ||
523 | args_left = args; | |
524 | GCPRO1 (args); | |
525 | ||
526 | do | |
527 | { | |
defb1411 | 528 | val = eval_sub (Fcar (Fcdr (args_left))); |
db9f0278 | 529 | sym = Fcar (args_left); |
b9598260 | 530 | |
defb1411 | 531 | /* Like for eval_sub, we do not check declared_special here since |
f07a954e SM |
532 | it's been done when let-binding. */ |
533 | if (!NILP (Vinternal_interpreter_environment) /* Mere optimization! */ | |
b9598260 | 534 | && SYMBOLP (sym) |
f07a954e SM |
535 | && !NILP (lex_binding |
536 | = Fassq (sym, Vinternal_interpreter_environment))) | |
b9598260 SM |
537 | XSETCDR (lex_binding, val); /* SYM is lexically bound. */ |
538 | else | |
539 | Fset (sym, val); /* SYM is dynamically bound. */ | |
540 | ||
db9f0278 JB |
541 | args_left = Fcdr (Fcdr (args_left)); |
542 | } | |
5e617bc2 | 543 | while (!NILP (args_left)); |
db9f0278 JB |
544 | |
545 | UNGCPRO; | |
546 | return val; | |
547 | } | |
177c0ea7 | 548 | |
db9f0278 | 549 | DEFUN ("quote", Fquote, Squote, 1, UNEVALLED, 0, |
9dbc9081 | 550 | doc: /* Return the argument, without evaluating it. `(quote x)' yields `x'. |
91a15bc6 SM |
551 | Warning: `quote' does not construct its return value, but just returns |
552 | the value that was pre-constructed by the Lisp reader (see info node | |
553 | `(elisp)Printed Representation'). | |
554 | This means that '(a . b) is not identical to (cons 'a 'b): the former | |
555 | does not cons. Quoting should be reserved for constants that will | |
556 | never be modified by side-effects, unless you like self-modifying code. | |
557 | See the common pitfall in info node `(elisp)Rearrangement' for an example | |
558 | of unexpected results when a quoted object is modified. | |
9dbc9081 | 559 | usage: (quote ARG) */) |
5842a27b | 560 | (Lisp_Object args) |
db9f0278 | 561 | { |
1283140e RS |
562 | if (!NILP (Fcdr (args))) |
563 | xsignal2 (Qwrong_number_of_arguments, Qquote, Flength (args)); | |
db9f0278 JB |
564 | return Fcar (args); |
565 | } | |
177c0ea7 | 566 | |
db9f0278 | 567 | DEFUN ("function", Ffunction, Sfunction, 1, UNEVALLED, 0, |
9dbc9081 PJ |
568 | doc: /* Like `quote', but preferred for objects which are functions. |
569 | In byte compilation, `function' causes its argument to be compiled. | |
570 | `quote' cannot do that. | |
571 | usage: (function ARG) */) | |
5842a27b | 572 | (Lisp_Object args) |
db9f0278 | 573 | { |
b9598260 SM |
574 | Lisp_Object quoted = XCAR (args); |
575 | ||
1283140e RS |
576 | if (!NILP (Fcdr (args))) |
577 | xsignal2 (Qwrong_number_of_arguments, Qfunction, Flength (args)); | |
b9598260 SM |
578 | |
579 | if (!NILP (Vinternal_interpreter_environment) | |
580 | && CONSP (quoted) | |
581 | && EQ (XCAR (quoted), Qlambda)) | |
582 | /* This is a lambda expression within a lexical environment; | |
583 | return an interpreted closure instead of a simple lambda. */ | |
23aba0ea SM |
584 | return Fcons (Qclosure, Fcons (Vinternal_interpreter_environment, |
585 | XCDR (quoted))); | |
b9598260 SM |
586 | else |
587 | /* Simply quote the argument. */ | |
588 | return quoted; | |
db9f0278 JB |
589 | } |
590 | ||
e0f331ab | 591 | |
1848d15d | 592 | DEFUN ("defvaralias", Fdefvaralias, Sdefvaralias, 2, 3, 0, |
4a9308b8 | 593 | doc: /* Make NEW-ALIAS a variable alias for symbol BASE-VARIABLE. |
e102f0d8 | 594 | Aliased variables always have the same value; setting one sets the other. |
4a9308b8 | 595 | Third arg DOCSTRING, if non-nil, is documentation for NEW-ALIAS. If it is |
dd60787c GM |
596 | omitted or nil, NEW-ALIAS gets the documentation string of BASE-VARIABLE, |
597 | or of the variable at the end of the chain of aliases, if BASE-VARIABLE is | |
598 | itself an alias. If NEW-ALIAS is bound, and BASE-VARIABLE is not, | |
599 | then the value of BASE-VARIABLE is set to that of NEW-ALIAS. | |
4a9308b8 | 600 | The return value is BASE-VARIABLE. */) |
5842a27b | 601 | (Lisp_Object new_alias, Lisp_Object base_variable, Lisp_Object docstring) |
19cebf5a GM |
602 | { |
603 | struct Lisp_Symbol *sym; | |
1848d15d | 604 | |
4a9308b8 JB |
605 | CHECK_SYMBOL (new_alias); |
606 | CHECK_SYMBOL (base_variable); | |
19cebf5a | 607 | |
4a9308b8 | 608 | sym = XSYMBOL (new_alias); |
ce5b453a SM |
609 | |
610 | if (sym->constant) | |
178f2507 SM |
611 | /* Not sure why, but why not? */ |
612 | error ("Cannot make a constant an alias"); | |
ce5b453a SM |
613 | |
614 | switch (sym->redirect) | |
615 | { | |
616 | case SYMBOL_FORWARDED: | |
617 | error ("Cannot make an internal variable an alias"); | |
618 | case SYMBOL_LOCALIZED: | |
619 | error ("Don't know how to make a localized variable an alias"); | |
620 | } | |
621 | ||
dd60787c | 622 | /* http://lists.gnu.org/archive/html/emacs-devel/2008-04/msg00834.html |
ce5b453a SM |
623 | If n_a is bound, but b_v is not, set the value of b_v to n_a, |
624 | so that old-code that affects n_a before the aliasing is setup | |
625 | still works. */ | |
626 | if (NILP (Fboundp (base_variable))) | |
94b612ad | 627 | set_internal (base_variable, find_symbol_value (new_alias), Qnil, 1); |
ce5b453a SM |
628 | |
629 | { | |
9349e5f7 | 630 | union specbinding *p; |
ce5b453a | 631 | |
bc985141 | 632 | for (p = specpdl_ptr; p > specpdl; ) |
2f592f95 SM |
633 | if ((--p)->kind >= SPECPDL_LET |
634 | && (EQ (new_alias, specpdl_symbol (p)))) | |
ce5b453a SM |
635 | error ("Don't know how to make a let-bound variable an alias"); |
636 | } | |
637 | ||
b9598260 | 638 | sym->declared_special = 1; |
0ac30604 | 639 | XSYMBOL (base_variable)->declared_special = 1; |
ce5b453a SM |
640 | sym->redirect = SYMBOL_VARALIAS; |
641 | SET_SYMBOL_ALIAS (sym, XSYMBOL (base_variable)); | |
4a9308b8 JB |
642 | sym->constant = SYMBOL_CONSTANT_P (base_variable); |
643 | LOADHIST_ATTACH (new_alias); | |
ce5b453a SM |
644 | /* Even if docstring is nil: remove old docstring. */ |
645 | Fput (new_alias, Qvariable_documentation, docstring); | |
1848d15d | 646 | |
4a9308b8 | 647 | return base_variable; |
19cebf5a GM |
648 | } |
649 | ||
650 | ||
db9f0278 | 651 | DEFUN ("defvar", Fdefvar, Sdefvar, 1, UNEVALLED, 0, |
29357847 | 652 | doc: /* Define SYMBOL as a variable, and return SYMBOL. |
c3a70e2b CY |
653 | You are not required to define a variable in order to use it, but |
654 | defining it lets you supply an initial value and documentation, which | |
655 | can be referred to by the Emacs help facilities and other programming | |
656 | tools. The `defvar' form also declares the variable as \"special\", | |
657 | so that it is always dynamically bound even if `lexical-binding' is t. | |
658 | ||
659 | The optional argument INITVALUE is evaluated, and used to set SYMBOL, | |
660 | only if SYMBOL's value is void. If SYMBOL is buffer-local, its | |
661 | default value is what is set; buffer-local values are not affected. | |
9dbc9081 | 662 | If INITVALUE is missing, SYMBOL's value is not set. |
733f68b6 LT |
663 | |
664 | If SYMBOL has a local binding, then this form affects the local | |
665 | binding. This is usually not what you want. Thus, if you need to | |
666 | load a file defining variables, with this form or with `defconst' or | |
667 | `defcustom', you should always load that file _outside_ any bindings | |
668 | for these variables. \(`defconst' and `defcustom' behave similarly in | |
669 | this respect.) | |
c3a70e2b CY |
670 | |
671 | The optional argument DOCSTRING is a documentation string for the | |
672 | variable. | |
673 | ||
674 | To define a user option, use `defcustom' instead of `defvar'. | |
2df5238c | 675 | usage: (defvar SYMBOL &optional INITVALUE DOCSTRING) */) |
5842a27b | 676 | (Lisp_Object args) |
db9f0278 | 677 | { |
a42ba017 | 678 | register Lisp_Object sym, tem, tail; |
db9f0278 JB |
679 | |
680 | sym = Fcar (args); | |
a42ba017 RS |
681 | tail = Fcdr (args); |
682 | if (!NILP (Fcdr (Fcdr (tail)))) | |
921baa95 | 683 | error ("Too many arguments"); |
a42ba017 | 684 | |
33568849 | 685 | tem = Fdefault_boundp (sym); |
a42ba017 | 686 | if (!NILP (tail)) |
db9f0278 | 687 | { |
ba83908c SM |
688 | /* Do it before evaluating the initial value, for self-references. */ |
689 | XSYMBOL (sym)->declared_special = 1; | |
590130fb | 690 | |
265a9e55 | 691 | if (NILP (tem)) |
defb1411 | 692 | Fset_default (sym, eval_sub (Fcar (tail))); |
d0bce91e SM |
693 | else |
694 | { /* Check if there is really a global binding rather than just a let | |
695 | binding that shadows the global unboundness of the var. */ | |
9349e5f7 | 696 | union specbinding *pdl = specpdl_ptr; |
d311d28c | 697 | while (pdl > specpdl) |
d0bce91e | 698 | { |
2f592f95 SM |
699 | if ((--pdl)->kind >= SPECPDL_LET |
700 | && EQ (specpdl_symbol (pdl), sym) | |
701 | && EQ (specpdl_old_value (pdl), Qunbound)) | |
d0bce91e | 702 | { |
23ba2705 SM |
703 | message_with_string |
704 | ("Warning: defvar ignored because %s is let-bound", | |
705 | SYMBOL_NAME (sym), 1); | |
d0bce91e SM |
706 | break; |
707 | } | |
708 | } | |
709 | } | |
33568849 | 710 | tail = Fcdr (tail); |
e509f168 SM |
711 | tem = Fcar (tail); |
712 | if (!NILP (tem)) | |
33568849 | 713 | { |
33568849 SM |
714 | if (!NILP (Vpurify_flag)) |
715 | tem = Fpurecopy (tem); | |
716 | Fput (sym, Qvariable_documentation, tem); | |
717 | } | |
6fd797f5 | 718 | LOADHIST_ATTACH (sym); |
db9f0278 | 719 | } |
f07a954e SM |
720 | else if (!NILP (Vinternal_interpreter_environment) |
721 | && !XSYMBOL (sym)->declared_special) | |
722 | /* A simple (defvar foo) with lexical scoping does "nothing" except | |
723 | declare that var to be dynamically scoped *locally* (i.e. within | |
724 | the current file or let-block). */ | |
23ba2705 SM |
725 | Vinternal_interpreter_environment |
726 | = Fcons (sym, Vinternal_interpreter_environment); | |
33568849 | 727 | else |
d28a2170 PE |
728 | { |
729 | /* Simple (defvar <var>) should not count as a definition at all. | |
730 | It could get in the way of other definitions, and unloading this | |
731 | package could try to make the variable unbound. */ | |
732 | } | |
addf35fd | 733 | |
db9f0278 JB |
734 | return sym; |
735 | } | |
736 | ||
737 | DEFUN ("defconst", Fdefconst, Sdefconst, 2, UNEVALLED, 0, | |
9dbc9081 | 738 | doc: /* Define SYMBOL as a constant variable. |
c3a70e2b CY |
739 | This declares that neither programs nor users should ever change the |
740 | value. This constancy is not actually enforced by Emacs Lisp, but | |
741 | SYMBOL is marked as a special variable so that it is never lexically | |
742 | bound. | |
743 | ||
744 | The `defconst' form always sets the value of SYMBOL to the result of | |
745 | evalling INITVALUE. If SYMBOL is buffer-local, its default value is | |
746 | what is set; buffer-local values are not affected. If SYMBOL has a | |
747 | local binding, then this form sets the local binding's value. | |
748 | However, you should normally not make local bindings for variables | |
749 | defined with this form. | |
750 | ||
751 | The optional DOCSTRING specifies the variable's documentation string. | |
7a25dc6d | 752 | usage: (defconst SYMBOL INITVALUE [DOCSTRING]) */) |
5842a27b | 753 | (Lisp_Object args) |
db9f0278 JB |
754 | { |
755 | register Lisp_Object sym, tem; | |
756 | ||
757 | sym = Fcar (args); | |
a42ba017 | 758 | if (!NILP (Fcdr (Fcdr (Fcdr (args))))) |
921baa95 | 759 | error ("Too many arguments"); |
a42ba017 | 760 | |
defb1411 | 761 | tem = eval_sub (Fcar (Fcdr (args))); |
1182a7cb DL |
762 | if (!NILP (Vpurify_flag)) |
763 | tem = Fpurecopy (tem); | |
764 | Fset_default (sym, tem); | |
b9598260 | 765 | XSYMBOL (sym)->declared_special = 1; |
db9f0278 | 766 | tem = Fcar (Fcdr (Fcdr (args))); |
265a9e55 | 767 | if (!NILP (tem)) |
db9f0278 | 768 | { |
265a9e55 | 769 | if (!NILP (Vpurify_flag)) |
db9f0278 JB |
770 | tem = Fpurecopy (tem); |
771 | Fput (sym, Qvariable_documentation, tem); | |
772 | } | |
873759d5 | 773 | Fput (sym, Qrisky_local_variable, Qt); |
6fd797f5 | 774 | LOADHIST_ATTACH (sym); |
db9f0278 JB |
775 | return sym; |
776 | } | |
777 | ||
513749ee SM |
778 | /* Make SYMBOL lexically scoped. */ |
779 | DEFUN ("internal-make-var-non-special", Fmake_var_non_special, | |
780 | Smake_var_non_special, 1, 1, 0, | |
781 | doc: /* Internal function. */) | |
782 | (Lisp_Object symbol) | |
783 | { | |
784 | CHECK_SYMBOL (symbol); | |
785 | XSYMBOL (symbol)->declared_special = 0; | |
786 | return Qnil; | |
787 | } | |
788 | ||
db9f0278 JB |
789 | \f |
790 | DEFUN ("let*", FletX, SletX, 1, UNEVALLED, 0, | |
9dbc9081 PJ |
791 | doc: /* Bind variables according to VARLIST then eval BODY. |
792 | The value of the last form in BODY is returned. | |
793 | Each element of VARLIST is a symbol (which is bound to nil) | |
794 | or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM). | |
795 | Each VALUEFORM can refer to the symbols already bound by this VARLIST. | |
7a25dc6d | 796 | usage: (let* VARLIST BODY...) */) |
5842a27b | 797 | (Lisp_Object args) |
db9f0278 | 798 | { |
b9598260 | 799 | Lisp_Object varlist, var, val, elt, lexenv; |
d311d28c | 800 | ptrdiff_t count = SPECPDL_INDEX (); |
db9f0278 JB |
801 | struct gcpro gcpro1, gcpro2, gcpro3; |
802 | ||
803 | GCPRO3 (args, elt, varlist); | |
804 | ||
b9598260 SM |
805 | lexenv = Vinternal_interpreter_environment; |
806 | ||
db9f0278 | 807 | varlist = Fcar (args); |
b9598260 | 808 | while (CONSP (varlist)) |
db9f0278 JB |
809 | { |
810 | QUIT; | |
b9598260 SM |
811 | |
812 | elt = XCAR (varlist); | |
90165123 | 813 | if (SYMBOLP (elt)) |
b9598260 SM |
814 | { |
815 | var = elt; | |
816 | val = Qnil; | |
817 | } | |
08564963 | 818 | else if (! NILP (Fcdr (Fcdr (elt)))) |
734d55a2 | 819 | signal_error ("`let' bindings can have only one value-form", elt); |
db9f0278 JB |
820 | else |
821 | { | |
b9598260 | 822 | var = Fcar (elt); |
defb1411 | 823 | val = eval_sub (Fcar (Fcdr (elt))); |
db9f0278 | 824 | } |
b9598260 | 825 | |
f07a954e SM |
826 | if (!NILP (lexenv) && SYMBOLP (var) |
827 | && !XSYMBOL (var)->declared_special | |
828 | && NILP (Fmemq (var, Vinternal_interpreter_environment))) | |
b9598260 SM |
829 | /* Lexically bind VAR by adding it to the interpreter's binding |
830 | alist. */ | |
831 | { | |
f07a954e SM |
832 | Lisp_Object newenv |
833 | = Fcons (Fcons (var, val), Vinternal_interpreter_environment); | |
834 | if (EQ (Vinternal_interpreter_environment, lexenv)) | |
835 | /* Save the old lexical environment on the specpdl stack, | |
836 | but only for the first lexical binding, since we'll never | |
837 | need to revert to one of the intermediate ones. */ | |
838 | specbind (Qinternal_interpreter_environment, newenv); | |
839 | else | |
840 | Vinternal_interpreter_environment = newenv; | |
db9f0278 | 841 | } |
b9598260 SM |
842 | else |
843 | specbind (var, val); | |
844 | ||
845 | varlist = XCDR (varlist); | |
db9f0278 JB |
846 | } |
847 | UNGCPRO; | |
848 | val = Fprogn (Fcdr (args)); | |
849 | return unbind_to (count, val); | |
850 | } | |
851 | ||
852 | DEFUN ("let", Flet, Slet, 1, UNEVALLED, 0, | |
9dbc9081 PJ |
853 | doc: /* Bind variables according to VARLIST then eval BODY. |
854 | The value of the last form in BODY is returned. | |
855 | Each element of VARLIST is a symbol (which is bound to nil) | |
856 | or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM). | |
857 | All the VALUEFORMs are evalled before any symbols are bound. | |
7a25dc6d | 858 | usage: (let VARLIST BODY...) */) |
5842a27b | 859 | (Lisp_Object args) |
db9f0278 | 860 | { |
b9598260 | 861 | Lisp_Object *temps, tem, lexenv; |
db9f0278 | 862 | register Lisp_Object elt, varlist; |
d311d28c | 863 | ptrdiff_t count = SPECPDL_INDEX (); |
f66c7cf8 | 864 | ptrdiff_t argnum; |
db9f0278 | 865 | struct gcpro gcpro1, gcpro2; |
3a7a9129 | 866 | USE_SAFE_ALLOCA; |
db9f0278 JB |
867 | |
868 | varlist = Fcar (args); | |
869 | ||
f6d62986 | 870 | /* Make space to hold the values to give the bound variables. */ |
db9f0278 | 871 | elt = Flength (varlist); |
b72e0717 | 872 | SAFE_ALLOCA_LISP (temps, XFASTINT (elt)); |
db9f0278 | 873 | |
f6d62986 | 874 | /* Compute the values and store them in `temps'. */ |
db9f0278 JB |
875 | |
876 | GCPRO2 (args, *temps); | |
877 | gcpro2.nvars = 0; | |
878 | ||
67ee9f6e | 879 | for (argnum = 0; CONSP (varlist); varlist = XCDR (varlist)) |
db9f0278 JB |
880 | { |
881 | QUIT; | |
67ee9f6e | 882 | elt = XCAR (varlist); |
90165123 | 883 | if (SYMBOLP (elt)) |
db9f0278 | 884 | temps [argnum++] = Qnil; |
08564963 | 885 | else if (! NILP (Fcdr (Fcdr (elt)))) |
734d55a2 | 886 | signal_error ("`let' bindings can have only one value-form", elt); |
db9f0278 | 887 | else |
defb1411 | 888 | temps [argnum++] = eval_sub (Fcar (Fcdr (elt))); |
db9f0278 JB |
889 | gcpro2.nvars = argnum; |
890 | } | |
891 | UNGCPRO; | |
892 | ||
b9598260 SM |
893 | lexenv = Vinternal_interpreter_environment; |
894 | ||
db9f0278 | 895 | varlist = Fcar (args); |
67ee9f6e | 896 | for (argnum = 0; CONSP (varlist); varlist = XCDR (varlist)) |
db9f0278 | 897 | { |
b9598260 SM |
898 | Lisp_Object var; |
899 | ||
67ee9f6e | 900 | elt = XCAR (varlist); |
b9598260 | 901 | var = SYMBOLP (elt) ? elt : Fcar (elt); |
db9f0278 | 902 | tem = temps[argnum++]; |
b9598260 | 903 | |
f07a954e SM |
904 | if (!NILP (lexenv) && SYMBOLP (var) |
905 | && !XSYMBOL (var)->declared_special | |
906 | && NILP (Fmemq (var, Vinternal_interpreter_environment))) | |
b9598260 SM |
907 | /* Lexically bind VAR by adding it to the lexenv alist. */ |
908 | lexenv = Fcons (Fcons (var, tem), lexenv); | |
db9f0278 | 909 | else |
b9598260 SM |
910 | /* Dynamically bind VAR. */ |
911 | specbind (var, tem); | |
db9f0278 JB |
912 | } |
913 | ||
b9598260 SM |
914 | if (!EQ (lexenv, Vinternal_interpreter_environment)) |
915 | /* Instantiate a new lexical environment. */ | |
916 | specbind (Qinternal_interpreter_environment, lexenv); | |
917 | ||
db9f0278 | 918 | elt = Fprogn (Fcdr (args)); |
3a7a9129 | 919 | SAFE_FREE (); |
db9f0278 JB |
920 | return unbind_to (count, elt); |
921 | } | |
922 | ||
923 | DEFUN ("while", Fwhile, Swhile, 1, UNEVALLED, 0, | |
9dbc9081 PJ |
924 | doc: /* If TEST yields non-nil, eval BODY... and repeat. |
925 | The order of execution is thus TEST, BODY, TEST, BODY and so on | |
926 | until TEST returns nil. | |
7a25dc6d | 927 | usage: (while TEST BODY...) */) |
5842a27b | 928 | (Lisp_Object args) |
db9f0278 | 929 | { |
2b9bde76 | 930 | Lisp_Object test, body; |
db9f0278 JB |
931 | struct gcpro gcpro1, gcpro2; |
932 | ||
933 | GCPRO2 (test, body); | |
934 | ||
935 | test = Fcar (args); | |
936 | body = Fcdr (args); | |
defb1411 | 937 | while (!NILP (eval_sub (test))) |
db9f0278 JB |
938 | { |
939 | QUIT; | |
940 | Fprogn (body); | |
941 | } | |
942 | ||
943 | UNGCPRO; | |
944 | return Qnil; | |
945 | } | |
946 | ||
947 | DEFUN ("macroexpand", Fmacroexpand, Smacroexpand, 1, 2, 0, | |
9dbc9081 PJ |
948 | doc: /* Return result of expanding macros at top level of FORM. |
949 | If FORM is not a macro call, it is returned unchanged. | |
950 | Otherwise, the macro is expanded and the expansion is considered | |
951 | in place of FORM. When a non-macro-call results, it is returned. | |
952 | ||
953 | The second optional arg ENVIRONMENT specifies an environment of macro | |
954 | definitions to shadow the loaded ones for use in file byte-compilation. */) | |
5842a27b | 955 | (Lisp_Object form, Lisp_Object environment) |
db9f0278 | 956 | { |
23d6b5a6 | 957 | /* With cleanups from Hallvard Furuseth. */ |
db9f0278 JB |
958 | register Lisp_Object expander, sym, def, tem; |
959 | ||
960 | while (1) | |
961 | { | |
962 | /* Come back here each time we expand a macro call, | |
963 | in case it expands into another macro call. */ | |
90165123 | 964 | if (!CONSP (form)) |
db9f0278 | 965 | break; |
23d6b5a6 | 966 | /* Set SYM, give DEF and TEM right values in case SYM is not a symbol. */ |
03699b14 | 967 | def = sym = XCAR (form); |
23d6b5a6 | 968 | tem = Qnil; |
db9f0278 JB |
969 | /* Trace symbols aliases to other symbols |
970 | until we get a symbol that is not an alias. */ | |
90165123 | 971 | while (SYMBOLP (def)) |
db9f0278 JB |
972 | { |
973 | QUIT; | |
23d6b5a6 | 974 | sym = def; |
79e8bfbf | 975 | tem = Fassq (sym, environment); |
265a9e55 | 976 | if (NILP (tem)) |
db9f0278 | 977 | { |
c644523b | 978 | def = XSYMBOL (sym)->function; |
eadf1faa | 979 | if (!NILP (def)) |
23d6b5a6 | 980 | continue; |
db9f0278 | 981 | } |
23d6b5a6 | 982 | break; |
db9f0278 | 983 | } |
79e8bfbf | 984 | /* Right now TEM is the result from SYM in ENVIRONMENT, |
db9f0278 | 985 | and if TEM is nil then DEF is SYM's function definition. */ |
265a9e55 | 986 | if (NILP (tem)) |
db9f0278 | 987 | { |
79e8bfbf | 988 | /* SYM is not mentioned in ENVIRONMENT. |
db9f0278 | 989 | Look at its function definition. */ |
7abaf5cc SM |
990 | struct gcpro gcpro1; |
991 | GCPRO1 (form); | |
992 | def = Fautoload_do_load (def, sym, Qmacro); | |
993 | UNGCPRO; | |
eadf1faa | 994 | if (!CONSP (def)) |
f6d62986 | 995 | /* Not defined or definition not suitable. */ |
db9f0278 | 996 | break; |
7abaf5cc | 997 | if (!EQ (XCAR (def), Qmacro)) |
db9f0278 | 998 | break; |
03699b14 | 999 | else expander = XCDR (def); |
db9f0278 JB |
1000 | } |
1001 | else | |
1002 | { | |
03699b14 | 1003 | expander = XCDR (tem); |
265a9e55 | 1004 | if (NILP (expander)) |
db9f0278 JB |
1005 | break; |
1006 | } | |
4f18a4ed SM |
1007 | { |
1008 | Lisp_Object newform = apply1 (expander, XCDR (form)); | |
1009 | if (EQ (form, newform)) | |
1010 | break; | |
1011 | else | |
1012 | form = newform; | |
1013 | } | |
db9f0278 JB |
1014 | } |
1015 | return form; | |
1016 | } | |
1017 | \f | |
1018 | DEFUN ("catch", Fcatch, Scatch, 1, UNEVALLED, 0, | |
9dbc9081 PJ |
1019 | doc: /* Eval BODY allowing nonlocal exits using `throw'. |
1020 | TAG is evalled to get the tag to use; it must not be nil. | |
1021 | ||
1022 | Then the BODY is executed. | |
1d632ccf | 1023 | Within BODY, a call to `throw' with the same TAG exits BODY and this `catch'. |
9dbc9081 PJ |
1024 | If no throw happens, `catch' returns the value of the last BODY form. |
1025 | If a throw happens, it specifies the value to return from `catch'. | |
7a25dc6d | 1026 | usage: (catch TAG BODY...) */) |
5842a27b | 1027 | (Lisp_Object args) |
db9f0278 JB |
1028 | { |
1029 | register Lisp_Object tag; | |
1030 | struct gcpro gcpro1; | |
1031 | ||
1032 | GCPRO1 (args); | |
defb1411 | 1033 | tag = eval_sub (Fcar (args)); |
db9f0278 JB |
1034 | UNGCPRO; |
1035 | return internal_catch (tag, Fprogn, Fcdr (args)); | |
1036 | } | |
1037 | ||
1038 | /* Set up a catch, then call C function FUNC on argument ARG. | |
1039 | FUNC should return a Lisp_Object. | |
2f592f95 | 1040 | This is how catches are done from within C code. */ |
db9f0278 JB |
1041 | |
1042 | Lisp_Object | |
d3da34e0 | 1043 | internal_catch (Lisp_Object tag, Lisp_Object (*func) (Lisp_Object), Lisp_Object arg) |
db9f0278 JB |
1044 | { |
1045 | /* This structure is made part of the chain `catchlist'. */ | |
1046 | struct catchtag c; | |
1047 | ||
1048 | /* Fill in the components of c, and put it on the list. */ | |
1049 | c.next = catchlist; | |
1050 | c.tag = tag; | |
1051 | c.val = Qnil; | |
db9f0278 JB |
1052 | c.handlerlist = handlerlist; |
1053 | c.lisp_eval_depth = lisp_eval_depth; | |
aed13378 | 1054 | c.pdlcount = SPECPDL_INDEX (); |
db9f0278 | 1055 | c.poll_suppress_count = poll_suppress_count; |
2659a09f | 1056 | c.interrupt_input_blocked = interrupt_input_blocked; |
db9f0278 | 1057 | c.gcpro = gcprolist; |
bcf28080 | 1058 | c.byte_stack = byte_stack_list; |
db9f0278 JB |
1059 | catchlist = &c; |
1060 | ||
1061 | /* Call FUNC. */ | |
0328b6de | 1062 | if (! sys_setjmp (c.jmp)) |
db9f0278 JB |
1063 | c.val = (*func) (arg); |
1064 | ||
1065 | /* Throw works by a longjmp that comes right here. */ | |
1066 | catchlist = c.next; | |
1067 | return c.val; | |
1068 | } | |
1069 | ||
ba410f40 JB |
1070 | /* Unwind the specbind, catch, and handler stacks back to CATCH, and |
1071 | jump to that CATCH, returning VALUE as the value of that catch. | |
db9f0278 | 1072 | |
4d7e6e51 | 1073 | This is the guts of Fthrow and Fsignal; they differ only in the way |
ba410f40 JB |
1074 | they choose the catch tag to throw to. A catch tag for a |
1075 | condition-case form has a TAG of Qnil. | |
db9f0278 | 1076 | |
ba410f40 JB |
1077 | Before each catch is discarded, unbind all special bindings and |
1078 | execute all unwind-protect clauses made above that catch. Unwind | |
1079 | the handler stack as we go, so that the proper handlers are in | |
1080 | effect for each unwind-protect clause we run. At the end, restore | |
1081 | some static info saved in CATCH, and longjmp to the location | |
4d7e6e51 | 1082 | specified there. |
ba410f40 JB |
1083 | |
1084 | This is used for correct unwinding in Fthrow and Fsignal. */ | |
db9f0278 | 1085 | |
845ca893 | 1086 | static _Noreturn void |
d3da34e0 | 1087 | unwind_to_catch (struct catchtag *catch, Lisp_Object value) |
db9f0278 | 1088 | { |
1882aa38 | 1089 | bool last_time; |
db9f0278 | 1090 | |
ba410f40 JB |
1091 | /* Save the value in the tag. */ |
1092 | catch->val = value; | |
1093 | ||
0b31741c | 1094 | /* Restore certain special C variables. */ |
1cdc3155 | 1095 | set_poll_suppress_count (catch->poll_suppress_count); |
4d7e6e51 | 1096 | unblock_input_to (catch->interrupt_input_blocked); |
69bbd6bd | 1097 | immediate_quit = 0; |
82da7701 | 1098 | |
db9f0278 JB |
1099 | do |
1100 | { | |
1101 | last_time = catchlist == catch; | |
82da7701 JB |
1102 | |
1103 | /* Unwind the specpdl stack, and then restore the proper set of | |
bb8e180f | 1104 | handlers. */ |
db9f0278 JB |
1105 | unbind_to (catchlist->pdlcount, Qnil); |
1106 | handlerlist = catchlist->handlerlist; | |
1107 | catchlist = catchlist->next; | |
1108 | } | |
1109 | while (! last_time); | |
1110 | ||
bcf28080 | 1111 | byte_stack_list = catch->byte_stack; |
db9f0278 | 1112 | gcprolist = catch->gcpro; |
15934ffa | 1113 | #ifdef DEBUG_GCPRO |
d8e2b5ba | 1114 | gcpro_level = gcprolist ? gcprolist->level + 1 : 0; |
15934ffa | 1115 | #endif |
db9f0278 | 1116 | lisp_eval_depth = catch->lisp_eval_depth; |
177c0ea7 | 1117 | |
0328b6de | 1118 | sys_longjmp (catch->jmp, 1); |
db9f0278 JB |
1119 | } |
1120 | ||
a7ca3326 | 1121 | DEFUN ("throw", Fthrow, Sthrow, 2, 2, 0, |
9dbc9081 PJ |
1122 | doc: /* Throw to the catch for TAG and return VALUE from it. |
1123 | Both TAG and VALUE are evalled. */) | |
5842a27b | 1124 | (register Lisp_Object tag, Lisp_Object value) |
db9f0278 JB |
1125 | { |
1126 | register struct catchtag *c; | |
1127 | ||
8788120f KS |
1128 | if (!NILP (tag)) |
1129 | for (c = catchlist; c; c = c->next) | |
1130 | { | |
1131 | if (EQ (c->tag, tag)) | |
1132 | unwind_to_catch (c, value); | |
1133 | } | |
734d55a2 | 1134 | xsignal2 (Qno_catch, tag, value); |
db9f0278 JB |
1135 | } |
1136 | ||
1137 | ||
1138 | DEFUN ("unwind-protect", Funwind_protect, Sunwind_protect, 1, UNEVALLED, 0, | |
9dbc9081 PJ |
1139 | doc: /* Do BODYFORM, protecting with UNWINDFORMS. |
1140 | If BODYFORM completes normally, its value is returned | |
1141 | after executing the UNWINDFORMS. | |
1142 | If BODYFORM exits nonlocally, the UNWINDFORMS are executed anyway. | |
7a25dc6d | 1143 | usage: (unwind-protect BODYFORM UNWINDFORMS...) */) |
5842a27b | 1144 | (Lisp_Object args) |
db9f0278 JB |
1145 | { |
1146 | Lisp_Object val; | |
d311d28c | 1147 | ptrdiff_t count = SPECPDL_INDEX (); |
db9f0278 | 1148 | |
04b28167 | 1149 | record_unwind_protect (Fprogn, Fcdr (args)); |
defb1411 | 1150 | val = eval_sub (Fcar (args)); |
177c0ea7 | 1151 | return unbind_to (count, val); |
db9f0278 JB |
1152 | } |
1153 | \f | |
db9f0278 | 1154 | DEFUN ("condition-case", Fcondition_case, Scondition_case, 2, UNEVALLED, 0, |
9dbc9081 | 1155 | doc: /* Regain control when an error is signaled. |
1b1acc13 | 1156 | Executes BODYFORM and returns its value if no error happens. |
9dbc9081 PJ |
1157 | Each element of HANDLERS looks like (CONDITION-NAME BODY...) |
1158 | where the BODY is made of Lisp expressions. | |
1159 | ||
1160 | A handler is applicable to an error | |
1161 | if CONDITION-NAME is one of the error's condition names. | |
1162 | If an error happens, the first applicable handler is run. | |
1163 | ||
024a2d76 CY |
1164 | The car of a handler may be a list of condition names instead of a |
1165 | single condition name; then it handles all of them. If the special | |
1166 | condition name `debug' is present in this list, it allows another | |
1167 | condition in the list to run the debugger if `debug-on-error' and the | |
1168 | other usual mechanisms says it should (otherwise, `condition-case' | |
1169 | suppresses the debugger). | |
9dbc9081 | 1170 | |
c997bb25 RS |
1171 | When a handler handles an error, control returns to the `condition-case' |
1172 | and it executes the handler's BODY... | |
d0acbbaf | 1173 | with VAR bound to (ERROR-SYMBOL . SIGNAL-DATA) from the error. |
bb8e180f | 1174 | \(If VAR is nil, the handler can't access that information.) |
c997bb25 RS |
1175 | Then the value of the last BODY form is returned from the `condition-case' |
1176 | expression. | |
9dbc9081 | 1177 | |
9dbc9081 | 1178 | See also the function `signal' for more info. |
2b47b74d | 1179 | usage: (condition-case VAR BODYFORM &rest HANDLERS) */) |
bb8e180f | 1180 | (Lisp_Object args) |
db9f0278 | 1181 | { |
40bce90b PE |
1182 | Lisp_Object var = Fcar (args); |
1183 | Lisp_Object bodyform = Fcar (Fcdr (args)); | |
1184 | Lisp_Object handlers = Fcdr (Fcdr (args)); | |
ee830945 RS |
1185 | |
1186 | return internal_lisp_condition_case (var, bodyform, handlers); | |
1187 | } | |
1188 | ||
1189 | /* Like Fcondition_case, but the args are separate | |
1190 | rather than passed in a list. Used by Fbyte_code. */ | |
1191 | ||
1192 | Lisp_Object | |
d3da34e0 JB |
1193 | internal_lisp_condition_case (volatile Lisp_Object var, Lisp_Object bodyform, |
1194 | Lisp_Object handlers) | |
ee830945 RS |
1195 | { |
1196 | Lisp_Object val; | |
1197 | struct catchtag c; | |
1198 | struct handler h; | |
1199 | ||
b7826503 | 1200 | CHECK_SYMBOL (var); |
82da7701 | 1201 | |
2b47b74d | 1202 | for (val = handlers; CONSP (val); val = XCDR (val)) |
82da7701 JB |
1203 | { |
1204 | Lisp_Object tem; | |
2b47b74d | 1205 | tem = XCAR (val); |
5f96776a RS |
1206 | if (! (NILP (tem) |
1207 | || (CONSP (tem) | |
03699b14 KR |
1208 | && (SYMBOLP (XCAR (tem)) |
1209 | || CONSP (XCAR (tem)))))) | |
e6c3da20 EZ |
1210 | error ("Invalid condition handler: %s", |
1211 | SDATA (Fprin1_to_string (tem, Qt))); | |
82da7701 | 1212 | } |
db9f0278 JB |
1213 | |
1214 | c.tag = Qnil; | |
1215 | c.val = Qnil; | |
db9f0278 JB |
1216 | c.handlerlist = handlerlist; |
1217 | c.lisp_eval_depth = lisp_eval_depth; | |
aed13378 | 1218 | c.pdlcount = SPECPDL_INDEX (); |
db9f0278 | 1219 | c.poll_suppress_count = poll_suppress_count; |
2659a09f | 1220 | c.interrupt_input_blocked = interrupt_input_blocked; |
db9f0278 | 1221 | c.gcpro = gcprolist; |
bcf28080 | 1222 | c.byte_stack = byte_stack_list; |
0328b6de | 1223 | if (sys_setjmp (c.jmp)) |
db9f0278 | 1224 | { |
265a9e55 | 1225 | if (!NILP (h.var)) |
bb8e180f | 1226 | specbind (h.var, c.val); |
9d58218c | 1227 | val = Fprogn (Fcdr (h.chosen_clause)); |
82da7701 JB |
1228 | |
1229 | /* Note that this just undoes the binding of h.var; whoever | |
1230 | longjumped to us unwound the stack to c.pdlcount before | |
2f592f95 | 1231 | throwing. */ |
db9f0278 JB |
1232 | unbind_to (c.pdlcount, Qnil); |
1233 | return val; | |
1234 | } | |
1235 | c.next = catchlist; | |
1236 | catchlist = &c; | |
177c0ea7 | 1237 | |
82da7701 JB |
1238 | h.var = var; |
1239 | h.handler = handlers; | |
db9f0278 | 1240 | h.next = handlerlist; |
db9f0278 JB |
1241 | h.tag = &c; |
1242 | handlerlist = &h; | |
1243 | ||
defb1411 | 1244 | val = eval_sub (bodyform); |
db9f0278 JB |
1245 | catchlist = c.next; |
1246 | handlerlist = h.next; | |
1247 | return val; | |
1248 | } | |
1249 | ||
f029ca5f RS |
1250 | /* Call the function BFUN with no arguments, catching errors within it |
1251 | according to HANDLERS. If there is an error, call HFUN with | |
1252 | one argument which is the data that describes the error: | |
1253 | (SIGNALNAME . DATA) | |
1254 | ||
1255 | HANDLERS can be a list of conditions to catch. | |
1256 | If HANDLERS is Qt, catch all errors. | |
1257 | If HANDLERS is Qerror, catch all errors | |
1258 | but allow the debugger to run if that is enabled. */ | |
1259 | ||
db9f0278 | 1260 | Lisp_Object |
d3da34e0 JB |
1261 | internal_condition_case (Lisp_Object (*bfun) (void), Lisp_Object handlers, |
1262 | Lisp_Object (*hfun) (Lisp_Object)) | |
db9f0278 JB |
1263 | { |
1264 | Lisp_Object val; | |
1265 | struct catchtag c; | |
1266 | struct handler h; | |
1267 | ||
1268 | c.tag = Qnil; | |
1269 | c.val = Qnil; | |
db9f0278 JB |
1270 | c.handlerlist = handlerlist; |
1271 | c.lisp_eval_depth = lisp_eval_depth; | |
aed13378 | 1272 | c.pdlcount = SPECPDL_INDEX (); |
db9f0278 | 1273 | c.poll_suppress_count = poll_suppress_count; |
2659a09f | 1274 | c.interrupt_input_blocked = interrupt_input_blocked; |
db9f0278 | 1275 | c.gcpro = gcprolist; |
bcf28080 | 1276 | c.byte_stack = byte_stack_list; |
0328b6de | 1277 | if (sys_setjmp (c.jmp)) |
db9f0278 | 1278 | { |
9d58218c | 1279 | return (*hfun) (c.val); |
db9f0278 JB |
1280 | } |
1281 | c.next = catchlist; | |
1282 | catchlist = &c; | |
1283 | h.handler = handlers; | |
1284 | h.var = Qnil; | |
db9f0278 JB |
1285 | h.next = handlerlist; |
1286 | h.tag = &c; | |
1287 | handlerlist = &h; | |
1288 | ||
1289 | val = (*bfun) (); | |
1290 | catchlist = c.next; | |
1291 | handlerlist = h.next; | |
1292 | return val; | |
1293 | } | |
1294 | ||
2659a09f | 1295 | /* Like internal_condition_case but call BFUN with ARG as its argument. */ |
f029ca5f | 1296 | |
d227775c | 1297 | Lisp_Object |
d3da34e0 JB |
1298 | internal_condition_case_1 (Lisp_Object (*bfun) (Lisp_Object), Lisp_Object arg, |
1299 | Lisp_Object handlers, Lisp_Object (*hfun) (Lisp_Object)) | |
d227775c RS |
1300 | { |
1301 | Lisp_Object val; | |
1302 | struct catchtag c; | |
1303 | struct handler h; | |
1304 | ||
1305 | c.tag = Qnil; | |
1306 | c.val = Qnil; | |
d227775c RS |
1307 | c.handlerlist = handlerlist; |
1308 | c.lisp_eval_depth = lisp_eval_depth; | |
aed13378 | 1309 | c.pdlcount = SPECPDL_INDEX (); |
d227775c | 1310 | c.poll_suppress_count = poll_suppress_count; |
2659a09f | 1311 | c.interrupt_input_blocked = interrupt_input_blocked; |
d227775c | 1312 | c.gcpro = gcprolist; |
bcf28080 | 1313 | c.byte_stack = byte_stack_list; |
0328b6de | 1314 | if (sys_setjmp (c.jmp)) |
d227775c | 1315 | { |
9d58218c | 1316 | return (*hfun) (c.val); |
d227775c RS |
1317 | } |
1318 | c.next = catchlist; | |
1319 | catchlist = &c; | |
1320 | h.handler = handlers; | |
1321 | h.var = Qnil; | |
1322 | h.next = handlerlist; | |
1323 | h.tag = &c; | |
1324 | handlerlist = &h; | |
1325 | ||
1326 | val = (*bfun) (arg); | |
1327 | catchlist = c.next; | |
1328 | handlerlist = h.next; | |
1329 | return val; | |
1330 | } | |
10b29d41 | 1331 | |
53967e09 CY |
1332 | /* Like internal_condition_case_1 but call BFUN with ARG1 and ARG2 as |
1333 | its arguments. */ | |
1334 | ||
1335 | Lisp_Object | |
178f2507 SM |
1336 | internal_condition_case_2 (Lisp_Object (*bfun) (Lisp_Object, Lisp_Object), |
1337 | Lisp_Object arg1, | |
1338 | Lisp_Object arg2, | |
1339 | Lisp_Object handlers, | |
1340 | Lisp_Object (*hfun) (Lisp_Object)) | |
53967e09 CY |
1341 | { |
1342 | Lisp_Object val; | |
1343 | struct catchtag c; | |
1344 | struct handler h; | |
1345 | ||
53967e09 CY |
1346 | c.tag = Qnil; |
1347 | c.val = Qnil; | |
53967e09 CY |
1348 | c.handlerlist = handlerlist; |
1349 | c.lisp_eval_depth = lisp_eval_depth; | |
1350 | c.pdlcount = SPECPDL_INDEX (); | |
1351 | c.poll_suppress_count = poll_suppress_count; | |
1352 | c.interrupt_input_blocked = interrupt_input_blocked; | |
1353 | c.gcpro = gcprolist; | |
1354 | c.byte_stack = byte_stack_list; | |
0328b6de | 1355 | if (sys_setjmp (c.jmp)) |
53967e09 CY |
1356 | { |
1357 | return (*hfun) (c.val); | |
1358 | } | |
1359 | c.next = catchlist; | |
1360 | catchlist = &c; | |
1361 | h.handler = handlers; | |
1362 | h.var = Qnil; | |
1363 | h.next = handlerlist; | |
1364 | h.tag = &c; | |
1365 | handlerlist = &h; | |
1366 | ||
1367 | val = (*bfun) (arg1, arg2); | |
1368 | catchlist = c.next; | |
1369 | handlerlist = h.next; | |
1370 | return val; | |
1371 | } | |
10b29d41 | 1372 | |
2659a09f | 1373 | /* Like internal_condition_case but call BFUN with NARGS as first, |
10b29d41 GM |
1374 | and ARGS as second argument. */ |
1375 | ||
1376 | Lisp_Object | |
f66c7cf8 PE |
1377 | internal_condition_case_n (Lisp_Object (*bfun) (ptrdiff_t, Lisp_Object *), |
1378 | ptrdiff_t nargs, | |
178f2507 SM |
1379 | Lisp_Object *args, |
1380 | Lisp_Object handlers, | |
cc92c454 SM |
1381 | Lisp_Object (*hfun) (Lisp_Object err, |
1382 | ptrdiff_t nargs, | |
1383 | Lisp_Object *args)) | |
10b29d41 GM |
1384 | { |
1385 | Lisp_Object val; | |
1386 | struct catchtag c; | |
1387 | struct handler h; | |
1388 | ||
1389 | c.tag = Qnil; | |
1390 | c.val = Qnil; | |
10b29d41 GM |
1391 | c.handlerlist = handlerlist; |
1392 | c.lisp_eval_depth = lisp_eval_depth; | |
aed13378 | 1393 | c.pdlcount = SPECPDL_INDEX (); |
10b29d41 | 1394 | c.poll_suppress_count = poll_suppress_count; |
2659a09f | 1395 | c.interrupt_input_blocked = interrupt_input_blocked; |
10b29d41 GM |
1396 | c.gcpro = gcprolist; |
1397 | c.byte_stack = byte_stack_list; | |
0328b6de | 1398 | if (sys_setjmp (c.jmp)) |
10b29d41 | 1399 | { |
cc92c454 | 1400 | return (*hfun) (c.val, nargs, args); |
10b29d41 GM |
1401 | } |
1402 | c.next = catchlist; | |
1403 | catchlist = &c; | |
1404 | h.handler = handlers; | |
1405 | h.var = Qnil; | |
1406 | h.next = handlerlist; | |
1407 | h.tag = &c; | |
1408 | handlerlist = &h; | |
1409 | ||
1410 | val = (*bfun) (nargs, args); | |
1411 | catchlist = c.next; | |
1412 | handlerlist = h.next; | |
1413 | return val; | |
1414 | } | |
1415 | ||
d227775c | 1416 | \f |
7d47b580 | 1417 | static Lisp_Object find_handler_clause (Lisp_Object, Lisp_Object); |
1882aa38 PE |
1418 | static bool maybe_call_debugger (Lisp_Object conditions, Lisp_Object sig, |
1419 | Lisp_Object data); | |
db9f0278 | 1420 | |
6d5eb5b0 SM |
1421 | void |
1422 | process_quit_flag (void) | |
1423 | { | |
1424 | Lisp_Object flag = Vquit_flag; | |
1425 | Vquit_flag = Qnil; | |
1426 | if (EQ (flag, Qkill_emacs)) | |
1427 | Fkill_emacs (Qnil); | |
1428 | if (EQ (Vthrow_on_input, flag)) | |
1429 | Fthrow (Vthrow_on_input, Qt); | |
1430 | Fsignal (Qquit, Qnil); | |
1431 | } | |
1432 | ||
a7ca3326 | 1433 | DEFUN ("signal", Fsignal, Ssignal, 2, 2, 0, |
9dbc9081 PJ |
1434 | doc: /* Signal an error. Args are ERROR-SYMBOL and associated DATA. |
1435 | This function does not return. | |
1436 | ||
1437 | An error symbol is a symbol with an `error-conditions' property | |
1438 | that is a list of condition names. | |
1439 | A handler for any of those names will get to handle this signal. | |
1440 | The symbol `error' should normally be one of them. | |
1441 | ||
1442 | DATA should be a list. Its elements are printed as part of the error message. | |
3297ec22 LT |
1443 | See Info anchor `(elisp)Definition of signal' for some details on how this |
1444 | error message is constructed. | |
9dbc9081 PJ |
1445 | If the signal is handled, DATA is made available to the handler. |
1446 | See also the function `condition-case'. */) | |
5842a27b | 1447 | (Lisp_Object error_symbol, Lisp_Object data) |
db9f0278 | 1448 | { |
bfa8ca43 | 1449 | /* When memory is full, ERROR-SYMBOL is nil, |
26631f2b RS |
1450 | and DATA is (REAL-ERROR-SYMBOL . REAL-DATA). |
1451 | That is a special case--don't do this in other situations. */ | |
db9f0278 | 1452 | Lisp_Object conditions; |
c11d3d17 | 1453 | Lisp_Object string; |
e7f7fbaa SM |
1454 | Lisp_Object real_error_symbol |
1455 | = (NILP (error_symbol) ? Fcar (data) : error_symbol); | |
1456 | register Lisp_Object clause = Qnil; | |
1457 | struct handler *h; | |
db9f0278 | 1458 | |
0caaedb1 | 1459 | immediate_quit = 0; |
d063129f | 1460 | abort_on_gc = 0; |
db9f0278 | 1461 | if (gc_in_progress || waiting_for_input) |
1088b922 | 1462 | emacs_abort (); |
db9f0278 | 1463 | |
26631f2b RS |
1464 | #if 0 /* rms: I don't know why this was here, |
1465 | but it is surely wrong for an error that is handled. */ | |
d148e14d | 1466 | #ifdef HAVE_WINDOW_SYSTEM |
df6c90d8 GM |
1467 | if (display_hourglass_p) |
1468 | cancel_hourglass (); | |
48f8dfa3 | 1469 | #endif |
177c0ea7 | 1470 | #endif |
48f8dfa3 | 1471 | |
61ede770 | 1472 | /* This hook is used by edebug. */ |
26631f2b RS |
1473 | if (! NILP (Vsignal_hook_function) |
1474 | && ! NILP (error_symbol)) | |
9f5903bb RS |
1475 | { |
1476 | /* Edebug takes care of restoring these variables when it exits. */ | |
1477 | if (lisp_eval_depth + 20 > max_lisp_eval_depth) | |
1478 | max_lisp_eval_depth = lisp_eval_depth + 20; | |
1479 | ||
1480 | if (SPECPDL_INDEX () + 40 > max_specpdl_size) | |
1481 | max_specpdl_size = SPECPDL_INDEX () + 40; | |
1482 | ||
1483 | call2 (Vsignal_hook_function, error_symbol, data); | |
1484 | } | |
61ede770 | 1485 | |
1ea9dec4 | 1486 | conditions = Fget (real_error_symbol, Qerror_conditions); |
db9f0278 | 1487 | |
a2ff3819 GM |
1488 | /* Remember from where signal was called. Skip over the frame for |
1489 | `signal' itself. If a frame for `error' follows, skip that, | |
26631f2b RS |
1490 | too. Don't do this when ERROR_SYMBOL is nil, because that |
1491 | is a memory-full error. */ | |
090a072f | 1492 | Vsignaling_function = Qnil; |
2f592f95 | 1493 | if (!NILP (error_symbol)) |
090a072f | 1494 | { |
9349e5f7 | 1495 | union specbinding *pdl = backtrace_next (backtrace_top ()); |
2f592f95 SM |
1496 | if (backtrace_p (pdl) && EQ (backtrace_function (pdl), Qerror)) |
1497 | pdl = backtrace_next (pdl); | |
1498 | if (backtrace_p (pdl)) | |
1499 | Vsignaling_function = backtrace_function (pdl); | |
090a072f | 1500 | } |
a2ff3819 | 1501 | |
e7f7fbaa | 1502 | for (h = handlerlist; h; h = h->next) |
db9f0278 | 1503 | { |
7d47b580 | 1504 | clause = find_handler_clause (h->handler, conditions); |
265a9e55 | 1505 | if (!NILP (clause)) |
e7f7fbaa | 1506 | break; |
db9f0278 | 1507 | } |
475545b5 | 1508 | |
e7f7fbaa | 1509 | if (/* Don't run the debugger for a memory-full error. |
e7c1b6ef | 1510 | (There is no room in memory to do that!) */ |
e7f7fbaa SM |
1511 | !NILP (error_symbol) |
1512 | && (!NILP (Vdebug_on_signal) | |
1513 | /* If no handler is present now, try to run the debugger. */ | |
1514 | || NILP (clause) | |
bd1ba3e8 CY |
1515 | /* A `debug' symbol in the handler list disables the normal |
1516 | suppression of the debugger. */ | |
1517 | || (CONSP (clause) && CONSP (XCAR (clause)) | |
1518 | && !NILP (Fmemq (Qdebug, XCAR (clause)))) | |
e7f7fbaa SM |
1519 | /* Special handler that means "print a message and run debugger |
1520 | if requested". */ | |
1521 | || EQ (h->handler, Qerror))) | |
1522 | { | |
1882aa38 | 1523 | bool debugger_called |
e7f7fbaa SM |
1524 | = maybe_call_debugger (conditions, error_symbol, data); |
1525 | /* We can't return values to code which signaled an error, but we | |
1526 | can continue code which has signaled a quit. */ | |
1527 | if (debugger_called && EQ (real_error_symbol, Qquit)) | |
1528 | return Qnil; | |
475545b5 | 1529 | } |
db9f0278 | 1530 | |
e7f7fbaa SM |
1531 | if (!NILP (clause)) |
1532 | { | |
1533 | Lisp_Object unwind_data | |
1534 | = (NILP (error_symbol) ? data : Fcons (error_symbol, data)); | |
475545b5 | 1535 | |
e7f7fbaa SM |
1536 | h->chosen_clause = clause; |
1537 | unwind_to_catch (h->tag, unwind_data); | |
1538 | } | |
1539 | else | |
1540 | { | |
1541 | if (catchlist != 0) | |
1542 | Fthrow (Qtop_level, Qt); | |
1543 | } | |
c11d3d17 | 1544 | |
1ea9dec4 | 1545 | if (! NILP (error_symbol)) |
c11d3d17 | 1546 | data = Fcons (error_symbol, data); |
475545b5 | 1547 | |
c11d3d17 | 1548 | string = Ferror_message_string (data); |
583f48b9 | 1549 | fatal ("%s", SDATA (string)); |
db9f0278 JB |
1550 | } |
1551 | ||
734d55a2 KS |
1552 | /* Internal version of Fsignal that never returns. |
1553 | Used for anything but Qquit (which can return from Fsignal). */ | |
1554 | ||
1555 | void | |
d3da34e0 | 1556 | xsignal (Lisp_Object error_symbol, Lisp_Object data) |
734d55a2 KS |
1557 | { |
1558 | Fsignal (error_symbol, data); | |
1088b922 | 1559 | emacs_abort (); |
734d55a2 KS |
1560 | } |
1561 | ||
1562 | /* Like xsignal, but takes 0, 1, 2, or 3 args instead of a list. */ | |
1563 | ||
1564 | void | |
d3da34e0 | 1565 | xsignal0 (Lisp_Object error_symbol) |
734d55a2 KS |
1566 | { |
1567 | xsignal (error_symbol, Qnil); | |
1568 | } | |
1569 | ||
1570 | void | |
d3da34e0 | 1571 | xsignal1 (Lisp_Object error_symbol, Lisp_Object arg) |
734d55a2 KS |
1572 | { |
1573 | xsignal (error_symbol, list1 (arg)); | |
1574 | } | |
1575 | ||
1576 | void | |
d3da34e0 | 1577 | xsignal2 (Lisp_Object error_symbol, Lisp_Object arg1, Lisp_Object arg2) |
734d55a2 KS |
1578 | { |
1579 | xsignal (error_symbol, list2 (arg1, arg2)); | |
1580 | } | |
1581 | ||
1582 | void | |
d3da34e0 | 1583 | xsignal3 (Lisp_Object error_symbol, Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3) |
734d55a2 KS |
1584 | { |
1585 | xsignal (error_symbol, list3 (arg1, arg2, arg3)); | |
1586 | } | |
1587 | ||
1588 | /* Signal `error' with message S, and additional arg ARG. | |
1589 | If ARG is not a genuine list, make it a one-element list. */ | |
1590 | ||
1591 | void | |
a8fe7202 | 1592 | signal_error (const char *s, Lisp_Object arg) |
734d55a2 KS |
1593 | { |
1594 | Lisp_Object tortoise, hare; | |
1595 | ||
1596 | hare = tortoise = arg; | |
1597 | while (CONSP (hare)) | |
1598 | { | |
1599 | hare = XCDR (hare); | |
1600 | if (!CONSP (hare)) | |
1601 | break; | |
1602 | ||
1603 | hare = XCDR (hare); | |
1604 | tortoise = XCDR (tortoise); | |
1605 | ||
1606 | if (EQ (hare, tortoise)) | |
1607 | break; | |
1608 | } | |
1609 | ||
1610 | if (!NILP (hare)) | |
1611 | arg = Fcons (arg, Qnil); /* Make it a list. */ | |
1612 | ||
1613 | xsignal (Qerror, Fcons (build_string (s), arg)); | |
1614 | } | |
1615 | ||
1616 | ||
1882aa38 | 1617 | /* Return true if LIST is a non-nil atom or |
128c0f66 RM |
1618 | a list containing one of CONDITIONS. */ |
1619 | ||
1882aa38 | 1620 | static bool |
d3da34e0 | 1621 | wants_debugger (Lisp_Object list, Lisp_Object conditions) |
128c0f66 | 1622 | { |
4de86b16 | 1623 | if (NILP (list)) |
128c0f66 RM |
1624 | return 0; |
1625 | if (! CONSP (list)) | |
1626 | return 1; | |
1627 | ||
ab67260b | 1628 | while (CONSP (conditions)) |
128c0f66 | 1629 | { |
ab67260b | 1630 | Lisp_Object this, tail; |
03699b14 KR |
1631 | this = XCAR (conditions); |
1632 | for (tail = list; CONSP (tail); tail = XCDR (tail)) | |
1633 | if (EQ (XCAR (tail), this)) | |
128c0f66 | 1634 | return 1; |
03699b14 | 1635 | conditions = XCDR (conditions); |
128c0f66 | 1636 | } |
ab67260b | 1637 | return 0; |
128c0f66 RM |
1638 | } |
1639 | ||
1882aa38 | 1640 | /* Return true if an error with condition-symbols CONDITIONS, |
fc950e09 | 1641 | and described by SIGNAL-DATA, should skip the debugger |
1b1acc13 | 1642 | according to debugger-ignored-errors. */ |
fc950e09 | 1643 | |
1882aa38 | 1644 | static bool |
d3da34e0 | 1645 | skip_debugger (Lisp_Object conditions, Lisp_Object data) |
fc950e09 KH |
1646 | { |
1647 | Lisp_Object tail; | |
1882aa38 | 1648 | bool first_string = 1; |
fc950e09 KH |
1649 | Lisp_Object error_message; |
1650 | ||
17401c97 GM |
1651 | error_message = Qnil; |
1652 | for (tail = Vdebug_ignored_errors; CONSP (tail); tail = XCDR (tail)) | |
fc950e09 | 1653 | { |
03699b14 | 1654 | if (STRINGP (XCAR (tail))) |
fc950e09 KH |
1655 | { |
1656 | if (first_string) | |
1657 | { | |
1658 | error_message = Ferror_message_string (data); | |
1659 | first_string = 0; | |
1660 | } | |
177c0ea7 | 1661 | |
03699b14 | 1662 | if (fast_string_match (XCAR (tail), error_message) >= 0) |
fc950e09 KH |
1663 | return 1; |
1664 | } | |
1665 | else | |
1666 | { | |
1667 | Lisp_Object contail; | |
1668 | ||
17401c97 | 1669 | for (contail = conditions; CONSP (contail); contail = XCDR (contail)) |
03699b14 | 1670 | if (EQ (XCAR (tail), XCAR (contail))) |
fc950e09 KH |
1671 | return 1; |
1672 | } | |
1673 | } | |
1674 | ||
1675 | return 0; | |
1676 | } | |
1677 | ||
ddaa36e1 | 1678 | /* Call the debugger if calling it is currently enabled for CONDITIONS. |
7d47b580 JB |
1679 | SIG and DATA describe the signal. There are two ways to pass them: |
1680 | = SIG is the error symbol, and DATA is the rest of the data. | |
1681 | = SIG is nil, and DATA is (SYMBOL . REST-OF-DATA). | |
1682 | This is for memory-full errors only. */ | |
1882aa38 | 1683 | static bool |
d3da34e0 | 1684 | maybe_call_debugger (Lisp_Object conditions, Lisp_Object sig, Lisp_Object data) |
ddaa36e1 AS |
1685 | { |
1686 | Lisp_Object combined_data; | |
1687 | ||
1688 | combined_data = Fcons (sig, data); | |
1689 | ||
1690 | if ( | |
1691 | /* Don't try to run the debugger with interrupts blocked. | |
1692 | The editing loop would return anyway. */ | |
4d7e6e51 | 1693 | ! input_blocked_p () |
45b82ad0 | 1694 | && NILP (Vinhibit_debugger) |
ddaa36e1 AS |
1695 | /* Does user want to enter debugger for this kind of error? */ |
1696 | && (EQ (sig, Qquit) | |
1697 | ? debug_on_quit | |
1698 | : wants_debugger (Vdebug_on_error, conditions)) | |
1699 | && ! skip_debugger (conditions, combined_data) | |
f6d62986 | 1700 | /* RMS: What's this for? */ |
ddaa36e1 AS |
1701 | && when_entered_debugger < num_nonmacro_input_events) |
1702 | { | |
1703 | call_debugger (Fcons (Qerror, Fcons (combined_data, Qnil))); | |
1704 | return 1; | |
1705 | } | |
1706 | ||
1707 | return 0; | |
1708 | } | |
1709 | ||
db9f0278 | 1710 | static Lisp_Object |
7d47b580 | 1711 | find_handler_clause (Lisp_Object handlers, Lisp_Object conditions) |
db9f0278 JB |
1712 | { |
1713 | register Lisp_Object h; | |
db9f0278 | 1714 | |
f01cbfdd RS |
1715 | /* t is used by handlers for all conditions, set up by C code. */ |
1716 | if (EQ (handlers, Qt)) | |
db9f0278 | 1717 | return Qt; |
f01cbfdd | 1718 | |
61ede770 RS |
1719 | /* error is used similarly, but means print an error message |
1720 | and run the debugger if that is enabled. */ | |
e7f7fbaa SM |
1721 | if (EQ (handlers, Qerror)) |
1722 | return Qt; | |
f01cbfdd | 1723 | |
e7f7fbaa | 1724 | for (h = handlers; CONSP (h); h = XCDR (h)) |
db9f0278 | 1725 | { |
e7f7fbaa SM |
1726 | Lisp_Object handler = XCAR (h); |
1727 | Lisp_Object condit, tem; | |
5f96776a | 1728 | |
5f96776a | 1729 | if (!CONSP (handler)) |
db9f0278 | 1730 | continue; |
e7f7fbaa | 1731 | condit = XCAR (handler); |
5f96776a RS |
1732 | /* Handle a single condition name in handler HANDLER. */ |
1733 | if (SYMBOLP (condit)) | |
1734 | { | |
1735 | tem = Fmemq (Fcar (handler), conditions); | |
1736 | if (!NILP (tem)) | |
1737 | return handler; | |
1738 | } | |
1739 | /* Handle a list of condition names in handler HANDLER. */ | |
1740 | else if (CONSP (condit)) | |
1741 | { | |
f01cbfdd RS |
1742 | Lisp_Object tail; |
1743 | for (tail = condit; CONSP (tail); tail = XCDR (tail)) | |
5f96776a | 1744 | { |
e7f7fbaa | 1745 | tem = Fmemq (XCAR (tail), conditions); |
5f96776a | 1746 | if (!NILP (tem)) |
e7f7fbaa | 1747 | return handler; |
5f96776a RS |
1748 | } |
1749 | } | |
db9f0278 | 1750 | } |
f01cbfdd | 1751 | |
db9f0278 JB |
1752 | return Qnil; |
1753 | } | |
1754 | ||
db9f0278 | 1755 | |
f6d62986 | 1756 | /* Dump an error message; called like vprintf. */ |
db9f0278 | 1757 | void |
b3ffc17c | 1758 | verror (const char *m, va_list ap) |
db9f0278 | 1759 | { |
70476b54 | 1760 | char buf[4000]; |
c2d1e36d PE |
1761 | ptrdiff_t size = sizeof buf; |
1762 | ptrdiff_t size_max = STRING_BYTES_BOUND + 1; | |
9125da08 | 1763 | char *buffer = buf; |
c2d1e36d | 1764 | ptrdiff_t used; |
9125da08 RS |
1765 | Lisp_Object string; |
1766 | ||
d749b01b | 1767 | used = evxprintf (&buffer, &size, buf, size_max, m, ap); |
5fdb398c | 1768 | string = make_string (buffer, used); |
eb3f1cc8 | 1769 | if (buffer != buf) |
9ae6734f | 1770 | xfree (buffer); |
9125da08 | 1771 | |
734d55a2 | 1772 | xsignal1 (Qerror, string); |
db9f0278 | 1773 | } |
b3ffc17c DN |
1774 | |
1775 | ||
f6d62986 | 1776 | /* Dump an error message; called like printf. */ |
b3ffc17c DN |
1777 | |
1778 | /* VARARGS 1 */ | |
1779 | void | |
1780 | error (const char *m, ...) | |
1781 | { | |
1782 | va_list ap; | |
1783 | va_start (ap, m); | |
1784 | verror (m, ap); | |
b3ffc17c | 1785 | } |
db9f0278 | 1786 | \f |
a7ca3326 | 1787 | DEFUN ("commandp", Fcommandp, Scommandp, 1, 2, 0, |
9dbc9081 PJ |
1788 | doc: /* Non-nil if FUNCTION makes provisions for interactive calling. |
1789 | This means it contains a description for how to read arguments to give it. | |
1790 | The value is nil for an invalid function or a symbol with no function | |
1791 | definition. | |
1792 | ||
1793 | Interactively callable functions include strings and vectors (treated | |
1794 | as keyboard macros), lambda-expressions that contain a top-level call | |
1795 | to `interactive', autoload definitions made by `autoload' with non-nil | |
1796 | fourth argument, and some of the built-in functions of Lisp. | |
1797 | ||
e72706be RS |
1798 | Also, a symbol satisfies `commandp' if its function definition does so. |
1799 | ||
1800 | If the optional argument FOR-CALL-INTERACTIVELY is non-nil, | |
769b4fb2 | 1801 | then strings and vectors are not accepted. */) |
5842a27b | 1802 | (Lisp_Object function, Lisp_Object for_call_interactively) |
db9f0278 JB |
1803 | { |
1804 | register Lisp_Object fun; | |
1805 | register Lisp_Object funcar; | |
52b71f49 | 1806 | Lisp_Object if_prop = Qnil; |
db9f0278 JB |
1807 | |
1808 | fun = function; | |
1809 | ||
eadf1faa SM |
1810 | fun = indirect_function (fun); /* Check cycles. */ |
1811 | if (NILP (fun)) | |
ffd56f97 | 1812 | return Qnil; |
db9f0278 | 1813 | |
52b71f49 | 1814 | /* Check an `interactive-form' property if present, analogous to the |
eadf1faa | 1815 | function-documentation property. */ |
52b71f49 SM |
1816 | fun = function; |
1817 | while (SYMBOLP (fun)) | |
1818 | { | |
2b9aa051 | 1819 | Lisp_Object tmp = Fget (fun, Qinteractive_form); |
52b71f49 SM |
1820 | if (!NILP (tmp)) |
1821 | if_prop = Qt; | |
1822 | fun = Fsymbol_function (fun); | |
1823 | } | |
1824 | ||
db9f0278 JB |
1825 | /* Emacs primitives are interactive if their DEFUN specifies an |
1826 | interactive spec. */ | |
90165123 | 1827 | if (SUBRP (fun)) |
04724b69 | 1828 | return XSUBR (fun)->intspec ? Qt : if_prop; |
db9f0278 JB |
1829 | |
1830 | /* Bytecode objects are interactive if they are long enough to | |
1831 | have an element whose index is COMPILED_INTERACTIVE, which is | |
1832 | where the interactive spec is stored. */ | |
90165123 | 1833 | else if (COMPILEDP (fun)) |
845975f5 | 1834 | return ((ASIZE (fun) & PSEUDOVECTOR_SIZE_MASK) > COMPILED_INTERACTIVE |
52b71f49 | 1835 | ? Qt : if_prop); |
db9f0278 JB |
1836 | |
1837 | /* Strings and vectors are keyboard macros. */ | |
52b71f49 | 1838 | if (STRINGP (fun) || VECTORP (fun)) |
6e33efc4 | 1839 | return (NILP (for_call_interactively) ? Qt : Qnil); |
db9f0278 JB |
1840 | |
1841 | /* Lists may represent commands. */ | |
1842 | if (!CONSP (fun)) | |
1843 | return Qnil; | |
ed16fb98 | 1844 | funcar = XCAR (fun); |
b38b1ec0 | 1845 | if (EQ (funcar, Qclosure)) |
7200d79c SM |
1846 | return (!NILP (Fassq (Qinteractive, Fcdr (Fcdr (XCDR (fun))))) |
1847 | ? Qt : if_prop); | |
23aba0ea | 1848 | else if (EQ (funcar, Qlambda)) |
52b71f49 | 1849 | return !NILP (Fassq (Qinteractive, Fcdr (XCDR (fun)))) ? Qt : if_prop; |
b38b1ec0 | 1850 | else if (EQ (funcar, Qautoload)) |
52b71f49 | 1851 | return !NILP (Fcar (Fcdr (Fcdr (XCDR (fun))))) ? Qt : if_prop; |
db9f0278 JB |
1852 | else |
1853 | return Qnil; | |
1854 | } | |
1855 | ||
db9f0278 | 1856 | DEFUN ("autoload", Fautoload, Sautoload, 2, 5, 0, |
9dbc9081 PJ |
1857 | doc: /* Define FUNCTION to autoload from FILE. |
1858 | FUNCTION is a symbol; FILE is a file name string to pass to `load'. | |
1859 | Third arg DOCSTRING is documentation for the function. | |
1860 | Fourth arg INTERACTIVE if non-nil says function can be called interactively. | |
1861 | Fifth arg TYPE indicates the type of the object: | |
1862 | nil or omitted says FUNCTION is a function, | |
1863 | `keymap' says FUNCTION is really a keymap, and | |
1864 | `macro' or t says FUNCTION is really a macro. | |
1865 | Third through fifth args give info about the real definition. | |
1866 | They default to nil. | |
1867 | If FUNCTION is already defined other than as an autoload, | |
1868 | this does nothing and returns nil. */) | |
5842a27b | 1869 | (Lisp_Object function, Lisp_Object file, Lisp_Object docstring, Lisp_Object interactive, Lisp_Object type) |
db9f0278 | 1870 | { |
b7826503 PJ |
1871 | CHECK_SYMBOL (function); |
1872 | CHECK_STRING (file); | |
db9f0278 | 1873 | |
f6d62986 | 1874 | /* If function is defined and not as an autoload, don't override. */ |
eadf1faa | 1875 | if (!NILP (XSYMBOL (function)->function) |
32e5c58c | 1876 | && !AUTOLOADP (XSYMBOL (function)->function)) |
db9f0278 JB |
1877 | return Qnil; |
1878 | ||
32e5c58c | 1879 | if (!NILP (Vpurify_flag) && EQ (docstring, make_number (0))) |
61b108cc SM |
1880 | /* `read1' in lread.c has found the docstring starting with "\ |
1881 | and assumed the docstring will be provided by Snarf-documentation, so it | |
1882 | passed us 0 instead. But that leads to accidental sharing in purecopy's | |
1883 | hash-consing, so we use a (hopefully) unique integer instead. */ | |
32e5c58c SM |
1884 | docstring = make_number (XHASH (function)); |
1885 | return Fdefalias (function, | |
1886 | list5 (Qautoload, file, docstring, interactive, type), | |
1887 | Qnil); | |
db9f0278 JB |
1888 | } |
1889 | ||
1890 | Lisp_Object | |
d3da34e0 | 1891 | un_autoload (Lisp_Object oldqueue) |
db9f0278 JB |
1892 | { |
1893 | register Lisp_Object queue, first, second; | |
1894 | ||
1895 | /* Queue to unwind is current value of Vautoload_queue. | |
1896 | oldqueue is the shadowed value to leave in Vautoload_queue. */ | |
1897 | queue = Vautoload_queue; | |
1898 | Vautoload_queue = oldqueue; | |
1899 | while (CONSP (queue)) | |
1900 | { | |
e509f168 | 1901 | first = XCAR (queue); |
db9f0278 JB |
1902 | second = Fcdr (first); |
1903 | first = Fcar (first); | |
47b82df9 RS |
1904 | if (EQ (first, make_number (0))) |
1905 | Vfeatures = second; | |
db9f0278 JB |
1906 | else |
1907 | Ffset (first, second); | |
e509f168 | 1908 | queue = XCDR (queue); |
db9f0278 JB |
1909 | } |
1910 | return Qnil; | |
1911 | } | |
1912 | ||
ca20916b RS |
1913 | /* Load an autoloaded function. |
1914 | FUNNAME is the symbol which is the function's name. | |
1915 | FUNDEF is the autoload definition (a list). */ | |
1916 | ||
7abaf5cc SM |
1917 | DEFUN ("autoload-do-load", Fautoload_do_load, Sautoload_do_load, 1, 3, 0, |
1918 | doc: /* Load FUNDEF which should be an autoload. | |
1919 | If non-nil, FUNNAME should be the symbol whose function value is FUNDEF, | |
1920 | in which case the function returns the new autoloaded function value. | |
1921 | If equal to `macro', MACRO-ONLY specifies that FUNDEF should only be loaded if | |
1922 | it is defines a macro. */) | |
1923 | (Lisp_Object fundef, Lisp_Object funname, Lisp_Object macro_only) | |
db9f0278 | 1924 | { |
d311d28c | 1925 | ptrdiff_t count = SPECPDL_INDEX (); |
ca20916b | 1926 | struct gcpro gcpro1, gcpro2, gcpro3; |
db9f0278 | 1927 | |
7abaf5cc SM |
1928 | if (!CONSP (fundef) || !EQ (Qautoload, XCAR (fundef))) |
1929 | return fundef; | |
1930 | ||
1931 | if (EQ (macro_only, Qmacro)) | |
1932 | { | |
1933 | Lisp_Object kind = Fnth (make_number (4), fundef); | |
1934 | if (! (EQ (kind, Qt) || EQ (kind, Qmacro))) | |
1935 | return fundef; | |
1936 | } | |
1937 | ||
aea6173f RS |
1938 | /* This is to make sure that loadup.el gives a clear picture |
1939 | of what files are preloaded and when. */ | |
ab4db096 RS |
1940 | if (! NILP (Vpurify_flag)) |
1941 | error ("Attempt to autoload %s while preparing to dump", | |
d5db4077 | 1942 | SDATA (SYMBOL_NAME (funname))); |
ab4db096 | 1943 | |
b7826503 | 1944 | CHECK_SYMBOL (funname); |
7abaf5cc | 1945 | GCPRO3 (funname, fundef, macro_only); |
db9f0278 | 1946 | |
f87740dc | 1947 | /* Preserve the match data. */ |
89f2614d | 1948 | record_unwind_save_match_data (); |
177c0ea7 | 1949 | |
a04ee161 RS |
1950 | /* If autoloading gets an error (which includes the error of failing |
1951 | to define the function being called), we use Vautoload_queue | |
1952 | to undo function definitions and `provide' calls made by | |
1953 | the function. We do this in the specific case of autoloading | |
1954 | because autoloading is not an explicit request "load this file", | |
1955 | but rather a request to "call this function". | |
d3da34e0 | 1956 | |
a04ee161 | 1957 | The value saved here is to be restored into Vautoload_queue. */ |
db9f0278 JB |
1958 | record_unwind_protect (un_autoload, Vautoload_queue); |
1959 | Vautoload_queue = Qt; | |
7abaf5cc SM |
1960 | /* If `macro_only', assume this autoload to be a "best-effort", |
1961 | so don't signal an error if autoloading fails. */ | |
1962 | Fload (Fcar (Fcdr (fundef)), macro_only, Qt, Qnil, Qt); | |
2a49b6e5 | 1963 | |
db9f0278 JB |
1964 | /* Once loading finishes, don't undo it. */ |
1965 | Vautoload_queue = Qt; | |
1966 | unbind_to (count, Qnil); | |
1967 | ||
ca20916b | 1968 | UNGCPRO; |
7abaf5cc SM |
1969 | |
1970 | if (NILP (funname)) | |
1971 | return Qnil; | |
1972 | else | |
1973 | { | |
1974 | Lisp_Object fun = Findirect_function (funname, Qnil); | |
1975 | ||
1976 | if (!NILP (Fequal (fun, fundef))) | |
1977 | error ("Autoloading failed to define function %s", | |
1978 | SDATA (SYMBOL_NAME (funname))); | |
1979 | else | |
1980 | return fun; | |
1981 | } | |
db9f0278 | 1982 | } |
4c576a83 | 1983 | |
db9f0278 | 1984 | \f |
a7ca3326 | 1985 | DEFUN ("eval", Feval, Seval, 1, 2, 0, |
a0ee6f27 SM |
1986 | doc: /* Evaluate FORM and return its value. |
1987 | If LEXICAL is t, evaluate using lexical scoping. */) | |
1988 | (Lisp_Object form, Lisp_Object lexical) | |
defb1411 | 1989 | { |
d311d28c | 1990 | ptrdiff_t count = SPECPDL_INDEX (); |
a0ee6f27 | 1991 | specbind (Qinternal_interpreter_environment, |
b5071fc7 | 1992 | CONSP (lexical) || NILP (lexical) ? lexical : Fcons (Qt, Qnil)); |
defb1411 SM |
1993 | return unbind_to (count, eval_sub (form)); |
1994 | } | |
1995 | ||
2f592f95 SM |
1996 | static void |
1997 | grow_specpdl (void) | |
1998 | { | |
9349e5f7 PE |
1999 | ptrdiff_t count = SPECPDL_INDEX (); |
2000 | ptrdiff_t max_size = min (max_specpdl_size, PTRDIFF_MAX - 1000); | |
2001 | union specbinding *pdlvec = specpdl - 1; | |
2002 | ptrdiff_t pdlvecsize = specpdl_size + 1; | |
2f592f95 SM |
2003 | if (max_size <= specpdl_size) |
2004 | { | |
2005 | if (max_specpdl_size < 400) | |
2006 | max_size = max_specpdl_size = 400; | |
2007 | if (max_size <= specpdl_size) | |
2008 | signal_error ("Variable binding depth exceeds max-specpdl-size", Qnil); | |
2009 | } | |
9349e5f7 PE |
2010 | pdlvec = xpalloc (pdlvec, &pdlvecsize, 1, max_size + 1, sizeof *specpdl); |
2011 | specpdl = pdlvec + 1; | |
2012 | specpdl_size = pdlvecsize - 1; | |
2f592f95 SM |
2013 | specpdl_ptr = specpdl + count; |
2014 | } | |
2015 | ||
3d5ee10a | 2016 | void |
2f592f95 SM |
2017 | record_in_backtrace (Lisp_Object function, Lisp_Object *args, ptrdiff_t nargs) |
2018 | { | |
2019 | eassert (nargs >= UNEVALLED); | |
2020 | if (specpdl_ptr == specpdl + specpdl_size) | |
2021 | grow_specpdl (); | |
9349e5f7 PE |
2022 | specpdl_ptr->bt.kind = SPECPDL_BACKTRACE; |
2023 | specpdl_ptr->bt.debug_on_exit = false; | |
2024 | specpdl_ptr->bt.function = function; | |
2025 | specpdl_ptr->bt.args = args; | |
2026 | specpdl_ptr->bt.nargs = nargs; | |
2f592f95 SM |
2027 | specpdl_ptr++; |
2028 | } | |
2029 | ||
defb1411 SM |
2030 | /* Eval a sub-expression of the current expression (i.e. in the same |
2031 | lexical scope). */ | |
2032 | Lisp_Object | |
2033 | eval_sub (Lisp_Object form) | |
db9f0278 JB |
2034 | { |
2035 | Lisp_Object fun, val, original_fun, original_args; | |
2036 | Lisp_Object funcar; | |
db9f0278 JB |
2037 | struct gcpro gcpro1, gcpro2, gcpro3; |
2038 | ||
90165123 | 2039 | if (SYMBOLP (form)) |
b9598260 | 2040 | { |
f07a954e SM |
2041 | /* Look up its binding in the lexical environment. |
2042 | We do not pay attention to the declared_special flag here, since we | |
2043 | already did that when let-binding the variable. */ | |
2044 | Lisp_Object lex_binding | |
2045 | = !NILP (Vinternal_interpreter_environment) /* Mere optimization! */ | |
2046 | ? Fassq (form, Vinternal_interpreter_environment) | |
2047 | : Qnil; | |
2048 | if (CONSP (lex_binding)) | |
2049 | return XCDR (lex_binding); | |
2050 | else | |
2051 | return Fsymbol_value (form); | |
b9598260 SM |
2052 | } |
2053 | ||
db9f0278 JB |
2054 | if (!CONSP (form)) |
2055 | return form; | |
2056 | ||
2057 | QUIT; | |
9d5a1260 DA |
2058 | |
2059 | GCPRO1 (form); | |
765e61e3 | 2060 | maybe_gc (); |
9d5a1260 | 2061 | UNGCPRO; |
db9f0278 JB |
2062 | |
2063 | if (++lisp_eval_depth > max_lisp_eval_depth) | |
2064 | { | |
2065 | if (max_lisp_eval_depth < 100) | |
2066 | max_lisp_eval_depth = 100; | |
2067 | if (lisp_eval_depth > max_lisp_eval_depth) | |
921baa95 | 2068 | error ("Lisp nesting exceeds `max-lisp-eval-depth'"); |
db9f0278 JB |
2069 | } |
2070 | ||
7d7bbefd DA |
2071 | original_fun = XCAR (form); |
2072 | original_args = XCDR (form); | |
db9f0278 | 2073 | |
2f592f95 SM |
2074 | /* This also protects them from gc. */ |
2075 | record_in_backtrace (original_fun, &original_args, UNEVALLED); | |
db9f0278 JB |
2076 | |
2077 | if (debug_on_next_call) | |
2078 | do_debug_on_call (Qt); | |
2079 | ||
2080 | /* At this point, only original_fun and original_args | |
f6d62986 | 2081 | have values that will be used below. */ |
db9f0278 | 2082 | retry: |
8788120f KS |
2083 | |
2084 | /* Optimize for no indirection. */ | |
2085 | fun = original_fun; | |
eadf1faa | 2086 | if (SYMBOLP (fun) && !NILP (fun) |
c644523b | 2087 | && (fun = XSYMBOL (fun)->function, SYMBOLP (fun))) |
8788120f | 2088 | fun = indirect_function (fun); |
db9f0278 | 2089 | |
90165123 | 2090 | if (SUBRP (fun)) |
db9f0278 JB |
2091 | { |
2092 | Lisp_Object numargs; | |
166c822d | 2093 | Lisp_Object argvals[8]; |
db9f0278 JB |
2094 | Lisp_Object args_left; |
2095 | register int i, maxargs; | |
2096 | ||
2097 | args_left = original_args; | |
2098 | numargs = Flength (args_left); | |
2099 | ||
7e63e0c3 | 2100 | check_cons_list (); |
c1788fbc | 2101 | |
f6d62986 SM |
2102 | if (XINT (numargs) < XSUBR (fun)->min_args |
2103 | || (XSUBR (fun)->max_args >= 0 | |
2104 | && XSUBR (fun)->max_args < XINT (numargs))) | |
734d55a2 | 2105 | xsignal2 (Qwrong_number_of_arguments, original_fun, numargs); |
db9f0278 | 2106 | |
ef1b0ba7 | 2107 | else if (XSUBR (fun)->max_args == UNEVALLED) |
bbc6b304 | 2108 | val = (XSUBR (fun)->function.aUNEVALLED) (args_left); |
ef1b0ba7 | 2109 | else if (XSUBR (fun)->max_args == MANY) |
db9f0278 | 2110 | { |
f6d62986 | 2111 | /* Pass a vector of evaluated arguments. */ |
db9f0278 | 2112 | Lisp_Object *vals; |
f66c7cf8 | 2113 | ptrdiff_t argnum = 0; |
3a7a9129 | 2114 | USE_SAFE_ALLOCA; |
db9f0278 | 2115 | |
b72e0717 | 2116 | SAFE_ALLOCA_LISP (vals, XINT (numargs)); |
db9f0278 JB |
2117 | |
2118 | GCPRO3 (args_left, fun, fun); | |
2119 | gcpro3.var = vals; | |
2120 | gcpro3.nvars = 0; | |
2121 | ||
265a9e55 | 2122 | while (!NILP (args_left)) |
db9f0278 | 2123 | { |
defb1411 | 2124 | vals[argnum++] = eval_sub (Fcar (args_left)); |
db9f0278 JB |
2125 | args_left = Fcdr (args_left); |
2126 | gcpro3.nvars = argnum; | |
2127 | } | |
db9f0278 | 2128 | |
2f592f95 SM |
2129 | set_backtrace_args (specpdl_ptr - 1, vals); |
2130 | set_backtrace_nargs (specpdl_ptr - 1, XINT (numargs)); | |
db9f0278 | 2131 | |
d5273788 | 2132 | val = (XSUBR (fun)->function.aMANY) (XINT (numargs), vals); |
a6e3fa71 | 2133 | UNGCPRO; |
3a7a9129 | 2134 | SAFE_FREE (); |
db9f0278 | 2135 | } |
ef1b0ba7 | 2136 | else |
db9f0278 | 2137 | { |
ef1b0ba7 SM |
2138 | GCPRO3 (args_left, fun, fun); |
2139 | gcpro3.var = argvals; | |
2140 | gcpro3.nvars = 0; | |
db9f0278 | 2141 | |
ef1b0ba7 SM |
2142 | maxargs = XSUBR (fun)->max_args; |
2143 | for (i = 0; i < maxargs; args_left = Fcdr (args_left)) | |
2144 | { | |
a0ee6f27 | 2145 | argvals[i] = eval_sub (Fcar (args_left)); |
ef1b0ba7 SM |
2146 | gcpro3.nvars = ++i; |
2147 | } | |
db9f0278 | 2148 | |
ef1b0ba7 | 2149 | UNGCPRO; |
db9f0278 | 2150 | |
2f592f95 SM |
2151 | set_backtrace_args (specpdl_ptr - 1, argvals); |
2152 | set_backtrace_nargs (specpdl_ptr - 1, XINT (numargs)); | |
ef1b0ba7 SM |
2153 | |
2154 | switch (i) | |
2155 | { | |
2156 | case 0: | |
2157 | val = (XSUBR (fun)->function.a0 ()); | |
2158 | break; | |
2159 | case 1: | |
2160 | val = (XSUBR (fun)->function.a1 (argvals[0])); | |
2161 | break; | |
2162 | case 2: | |
2163 | val = (XSUBR (fun)->function.a2 (argvals[0], argvals[1])); | |
2164 | break; | |
2165 | case 3: | |
2166 | val = (XSUBR (fun)->function.a3 | |
2167 | (argvals[0], argvals[1], argvals[2])); | |
2168 | break; | |
2169 | case 4: | |
2170 | val = (XSUBR (fun)->function.a4 | |
2171 | (argvals[0], argvals[1], argvals[2], argvals[3])); | |
2172 | break; | |
2173 | case 5: | |
2174 | val = (XSUBR (fun)->function.a5 | |
2175 | (argvals[0], argvals[1], argvals[2], argvals[3], | |
2176 | argvals[4])); | |
2177 | break; | |
2178 | case 6: | |
2179 | val = (XSUBR (fun)->function.a6 | |
2180 | (argvals[0], argvals[1], argvals[2], argvals[3], | |
2181 | argvals[4], argvals[5])); | |
2182 | break; | |
2183 | case 7: | |
2184 | val = (XSUBR (fun)->function.a7 | |
2185 | (argvals[0], argvals[1], argvals[2], argvals[3], | |
2186 | argvals[4], argvals[5], argvals[6])); | |
2187 | break; | |
2188 | ||
2189 | case 8: | |
2190 | val = (XSUBR (fun)->function.a8 | |
2191 | (argvals[0], argvals[1], argvals[2], argvals[3], | |
2192 | argvals[4], argvals[5], argvals[6], argvals[7])); | |
2193 | break; | |
2194 | ||
2195 | default: | |
2196 | /* Someone has created a subr that takes more arguments than | |
2197 | is supported by this code. We need to either rewrite the | |
2198 | subr to use a different argument protocol, or add more | |
2199 | cases to this switch. */ | |
1088b922 | 2200 | emacs_abort (); |
ef1b0ba7 | 2201 | } |
db9f0278 JB |
2202 | } |
2203 | } | |
ef1b0ba7 | 2204 | else if (COMPILEDP (fun)) |
defb1411 | 2205 | val = apply_lambda (fun, original_args); |
db9f0278 JB |
2206 | else |
2207 | { | |
eadf1faa | 2208 | if (NILP (fun)) |
734d55a2 | 2209 | xsignal1 (Qvoid_function, original_fun); |
db9f0278 | 2210 | if (!CONSP (fun)) |
734d55a2 KS |
2211 | xsignal1 (Qinvalid_function, original_fun); |
2212 | funcar = XCAR (fun); | |
90165123 | 2213 | if (!SYMBOLP (funcar)) |
734d55a2 | 2214 | xsignal1 (Qinvalid_function, original_fun); |
db9f0278 JB |
2215 | if (EQ (funcar, Qautoload)) |
2216 | { | |
7abaf5cc | 2217 | Fautoload_do_load (fun, original_fun, Qnil); |
db9f0278 JB |
2218 | goto retry; |
2219 | } | |
2220 | if (EQ (funcar, Qmacro)) | |
8be3a09c SM |
2221 | { |
2222 | ptrdiff_t count = SPECPDL_INDEX (); | |
8be3a09c SM |
2223 | Lisp_Object exp; |
2224 | /* Bind lexical-binding during expansion of the macro, so the | |
2225 | macro can know reliably if the code it outputs will be | |
2226 | interpreted using lexical-binding or not. */ | |
2227 | specbind (Qlexical_binding, | |
2228 | NILP (Vinternal_interpreter_environment) ? Qnil : Qt); | |
2229 | exp = apply1 (Fcdr (fun), original_args); | |
2230 | unbind_to (count, Qnil); | |
2231 | val = eval_sub (exp); | |
2232 | } | |
defb1411 SM |
2233 | else if (EQ (funcar, Qlambda) |
2234 | || EQ (funcar, Qclosure)) | |
2235 | val = apply_lambda (fun, original_args); | |
db9f0278 | 2236 | else |
734d55a2 | 2237 | xsignal1 (Qinvalid_function, original_fun); |
db9f0278 | 2238 | } |
7e63e0c3 | 2239 | check_cons_list (); |
c1788fbc | 2240 | |
db9f0278 | 2241 | lisp_eval_depth--; |
2f592f95 | 2242 | if (backtrace_debug_on_exit (specpdl_ptr - 1)) |
db9f0278 | 2243 | val = call_debugger (Fcons (Qexit, Fcons (val, Qnil))); |
2f592f95 | 2244 | specpdl_ptr--; |
824eb35e | 2245 | |
db9f0278 JB |
2246 | return val; |
2247 | } | |
2248 | \f | |
8edd4a2b | 2249 | DEFUN ("apply", Fapply, Sapply, 1, MANY, 0, |
9dbc9081 PJ |
2250 | doc: /* Call FUNCTION with our remaining args, using our last arg as list of args. |
2251 | Then return the value FUNCTION returns. | |
2252 | Thus, (apply '+ 1 2 '(3 4)) returns 10. | |
2253 | usage: (apply FUNCTION &rest ARGUMENTS) */) | |
f66c7cf8 | 2254 | (ptrdiff_t nargs, Lisp_Object *args) |
db9f0278 | 2255 | { |
d311d28c PE |
2256 | ptrdiff_t i; |
2257 | EMACS_INT numargs; | |
db9f0278 JB |
2258 | register Lisp_Object spread_arg; |
2259 | register Lisp_Object *funcall_args; | |
3a7a9129 | 2260 | Lisp_Object fun, retval; |
96d44c64 | 2261 | struct gcpro gcpro1; |
3a7a9129 | 2262 | USE_SAFE_ALLOCA; |
db9f0278 JB |
2263 | |
2264 | fun = args [0]; | |
2265 | funcall_args = 0; | |
2266 | spread_arg = args [nargs - 1]; | |
b7826503 | 2267 | CHECK_LIST (spread_arg); |
177c0ea7 | 2268 | |
db9f0278 JB |
2269 | numargs = XINT (Flength (spread_arg)); |
2270 | ||
2271 | if (numargs == 0) | |
2272 | return Ffuncall (nargs - 1, args); | |
2273 | else if (numargs == 1) | |
2274 | { | |
03699b14 | 2275 | args [nargs - 1] = XCAR (spread_arg); |
db9f0278 JB |
2276 | return Ffuncall (nargs, args); |
2277 | } | |
2278 | ||
a6e3fa71 | 2279 | numargs += nargs - 2; |
db9f0278 | 2280 | |
8788120f | 2281 | /* Optimize for no indirection. */ |
eadf1faa | 2282 | if (SYMBOLP (fun) && !NILP (fun) |
c644523b | 2283 | && (fun = XSYMBOL (fun)->function, SYMBOLP (fun))) |
8788120f | 2284 | fun = indirect_function (fun); |
eadf1faa | 2285 | if (NILP (fun)) |
db9f0278 | 2286 | { |
f6d62986 | 2287 | /* Let funcall get the error. */ |
ffd56f97 JB |
2288 | fun = args[0]; |
2289 | goto funcall; | |
db9f0278 JB |
2290 | } |
2291 | ||
90165123 | 2292 | if (SUBRP (fun)) |
db9f0278 JB |
2293 | { |
2294 | if (numargs < XSUBR (fun)->min_args | |
2295 | || (XSUBR (fun)->max_args >= 0 && XSUBR (fun)->max_args < numargs)) | |
f6d62986 | 2296 | goto funcall; /* Let funcall get the error. */ |
c5101a77 | 2297 | else if (XSUBR (fun)->max_args >= 0 && XSUBR (fun)->max_args > numargs) |
db9f0278 JB |
2298 | { |
2299 | /* Avoid making funcall cons up a yet another new vector of arguments | |
f6d62986 | 2300 | by explicitly supplying nil's for optional values. */ |
b72e0717 | 2301 | SAFE_ALLOCA_LISP (funcall_args, 1 + XSUBR (fun)->max_args); |
db9f0278 JB |
2302 | for (i = numargs; i < XSUBR (fun)->max_args;) |
2303 | funcall_args[++i] = Qnil; | |
96d44c64 SM |
2304 | GCPRO1 (*funcall_args); |
2305 | gcpro1.nvars = 1 + XSUBR (fun)->max_args; | |
db9f0278 JB |
2306 | } |
2307 | } | |
2308 | funcall: | |
2309 | /* We add 1 to numargs because funcall_args includes the | |
2310 | function itself as well as its arguments. */ | |
2311 | if (!funcall_args) | |
a6e3fa71 | 2312 | { |
b72e0717 | 2313 | SAFE_ALLOCA_LISP (funcall_args, 1 + numargs); |
96d44c64 SM |
2314 | GCPRO1 (*funcall_args); |
2315 | gcpro1.nvars = 1 + numargs; | |
a6e3fa71 JB |
2316 | } |
2317 | ||
663e2b3f | 2318 | memcpy (funcall_args, args, nargs * word_size); |
db9f0278 JB |
2319 | /* Spread the last arg we got. Its first element goes in |
2320 | the slot that it used to occupy, hence this value of I. */ | |
2321 | i = nargs - 1; | |
265a9e55 | 2322 | while (!NILP (spread_arg)) |
db9f0278 | 2323 | { |
03699b14 KR |
2324 | funcall_args [i++] = XCAR (spread_arg); |
2325 | spread_arg = XCDR (spread_arg); | |
db9f0278 | 2326 | } |
a6e3fa71 | 2327 | |
96d44c64 | 2328 | /* By convention, the caller needs to gcpro Ffuncall's args. */ |
3a7a9129 CY |
2329 | retval = Ffuncall (gcpro1.nvars, funcall_args); |
2330 | UNGCPRO; | |
2331 | SAFE_FREE (); | |
2332 | ||
2333 | return retval; | |
db9f0278 JB |
2334 | } |
2335 | \f | |
ff936e53 SM |
2336 | /* Run hook variables in various ways. */ |
2337 | ||
f6d62986 | 2338 | static Lisp_Object |
f66c7cf8 | 2339 | funcall_nil (ptrdiff_t nargs, Lisp_Object *args) |
f6d62986 SM |
2340 | { |
2341 | Ffuncall (nargs, args); | |
2342 | return Qnil; | |
2343 | } | |
ff936e53 | 2344 | |
a7ca3326 | 2345 | DEFUN ("run-hooks", Frun_hooks, Srun_hooks, 0, MANY, 0, |
9f685258 | 2346 | doc: /* Run each hook in HOOKS. |
9dbc9081 PJ |
2347 | Each argument should be a symbol, a hook variable. |
2348 | These symbols are processed in the order specified. | |
2349 | If a hook symbol has a non-nil value, that value may be a function | |
2350 | or a list of functions to be called to run the hook. | |
2351 | If the value is a function, it is called with no arguments. | |
2352 | If it is a list, the elements are called, in order, with no arguments. | |
2353 | ||
9f685258 LK |
2354 | Major modes should not use this function directly to run their mode |
2355 | hook; they should use `run-mode-hooks' instead. | |
2356 | ||
72e85d5d RS |
2357 | Do not use `make-local-variable' to make a hook variable buffer-local. |
2358 | Instead, use `add-hook' and specify t for the LOCAL argument. | |
9dbc9081 | 2359 | usage: (run-hooks &rest HOOKS) */) |
f66c7cf8 | 2360 | (ptrdiff_t nargs, Lisp_Object *args) |
ff936e53 SM |
2361 | { |
2362 | Lisp_Object hook[1]; | |
f66c7cf8 | 2363 | ptrdiff_t i; |
ff936e53 SM |
2364 | |
2365 | for (i = 0; i < nargs; i++) | |
2366 | { | |
2367 | hook[0] = args[i]; | |
f6d62986 | 2368 | run_hook_with_args (1, hook, funcall_nil); |
ff936e53 SM |
2369 | } |
2370 | ||
2371 | return Qnil; | |
2372 | } | |
177c0ea7 | 2373 | |
a7ca3326 | 2374 | DEFUN ("run-hook-with-args", Frun_hook_with_args, |
9dbc9081 PJ |
2375 | Srun_hook_with_args, 1, MANY, 0, |
2376 | doc: /* Run HOOK with the specified arguments ARGS. | |
d393cefb GM |
2377 | HOOK should be a symbol, a hook variable. The value of HOOK |
2378 | may be nil, a function, or a list of functions. Call each | |
2379 | function in order with arguments ARGS. The final return value | |
2380 | is unspecified. | |
9dbc9081 | 2381 | |
72e85d5d RS |
2382 | Do not use `make-local-variable' to make a hook variable buffer-local. |
2383 | Instead, use `add-hook' and specify t for the LOCAL argument. | |
9dbc9081 | 2384 | usage: (run-hook-with-args HOOK &rest ARGS) */) |
f66c7cf8 | 2385 | (ptrdiff_t nargs, Lisp_Object *args) |
ff936e53 | 2386 | { |
f6d62986 | 2387 | return run_hook_with_args (nargs, args, funcall_nil); |
ff936e53 SM |
2388 | } |
2389 | ||
d393cefb GM |
2390 | /* NB this one still documents a specific non-nil return value. |
2391 | (As did run-hook-with-args and run-hook-with-args-until-failure | |
2392 | until they were changed in 24.1.) */ | |
a0d76c27 | 2393 | DEFUN ("run-hook-with-args-until-success", Frun_hook_with_args_until_success, |
9dbc9081 PJ |
2394 | Srun_hook_with_args_until_success, 1, MANY, 0, |
2395 | doc: /* Run HOOK with the specified arguments ARGS. | |
d393cefb GM |
2396 | HOOK should be a symbol, a hook variable. The value of HOOK |
2397 | may be nil, a function, or a list of functions. Call each | |
2398 | function in order with arguments ARGS, stopping at the first | |
2399 | one that returns non-nil, and return that value. Otherwise (if | |
2400 | all functions return nil, or if there are no functions to call), | |
2401 | return nil. | |
9dbc9081 | 2402 | |
72e85d5d RS |
2403 | Do not use `make-local-variable' to make a hook variable buffer-local. |
2404 | Instead, use `add-hook' and specify t for the LOCAL argument. | |
9dbc9081 | 2405 | usage: (run-hook-with-args-until-success HOOK &rest ARGS) */) |
f66c7cf8 | 2406 | (ptrdiff_t nargs, Lisp_Object *args) |
b0b667cb | 2407 | { |
f6d62986 SM |
2408 | return run_hook_with_args (nargs, args, Ffuncall); |
2409 | } | |
2410 | ||
2411 | static Lisp_Object | |
f66c7cf8 | 2412 | funcall_not (ptrdiff_t nargs, Lisp_Object *args) |
f6d62986 SM |
2413 | { |
2414 | return NILP (Ffuncall (nargs, args)) ? Qt : Qnil; | |
ff936e53 SM |
2415 | } |
2416 | ||
a7ca3326 | 2417 | DEFUN ("run-hook-with-args-until-failure", Frun_hook_with_args_until_failure, |
9dbc9081 PJ |
2418 | Srun_hook_with_args_until_failure, 1, MANY, 0, |
2419 | doc: /* Run HOOK with the specified arguments ARGS. | |
d393cefb GM |
2420 | HOOK should be a symbol, a hook variable. The value of HOOK |
2421 | may be nil, a function, or a list of functions. Call each | |
2422 | function in order with arguments ARGS, stopping at the first | |
2423 | one that returns nil, and return nil. Otherwise (if all functions | |
2424 | return non-nil, or if there are no functions to call), return non-nil | |
2425 | \(do not rely on the precise return value in this case). | |
9dbc9081 | 2426 | |
72e85d5d RS |
2427 | Do not use `make-local-variable' to make a hook variable buffer-local. |
2428 | Instead, use `add-hook' and specify t for the LOCAL argument. | |
9dbc9081 | 2429 | usage: (run-hook-with-args-until-failure HOOK &rest ARGS) */) |
f66c7cf8 | 2430 | (ptrdiff_t nargs, Lisp_Object *args) |
ff936e53 | 2431 | { |
f6d62986 | 2432 | return NILP (run_hook_with_args (nargs, args, funcall_not)) ? Qt : Qnil; |
ff936e53 SM |
2433 | } |
2434 | ||
f6d62986 | 2435 | static Lisp_Object |
f66c7cf8 | 2436 | run_hook_wrapped_funcall (ptrdiff_t nargs, Lisp_Object *args) |
f6d62986 SM |
2437 | { |
2438 | Lisp_Object tmp = args[0], ret; | |
2439 | args[0] = args[1]; | |
2440 | args[1] = tmp; | |
2441 | ret = Ffuncall (nargs, args); | |
2442 | args[1] = args[0]; | |
2443 | args[0] = tmp; | |
2444 | return ret; | |
2445 | } | |
2446 | ||
2447 | DEFUN ("run-hook-wrapped", Frun_hook_wrapped, Srun_hook_wrapped, 2, MANY, 0, | |
2448 | doc: /* Run HOOK, passing each function through WRAP-FUNCTION. | |
2449 | I.e. instead of calling each function FUN directly with arguments ARGS, | |
2450 | it calls WRAP-FUNCTION with arguments FUN and ARGS. | |
2451 | As soon as a call to WRAP-FUNCTION returns non-nil, `run-hook-wrapped' | |
2452 | aborts and returns that value. | |
2453 | usage: (run-hook-wrapped HOOK WRAP-FUNCTION &rest ARGS) */) | |
f66c7cf8 | 2454 | (ptrdiff_t nargs, Lisp_Object *args) |
f6d62986 SM |
2455 | { |
2456 | return run_hook_with_args (nargs, args, run_hook_wrapped_funcall); | |
2457 | } | |
ff936e53 | 2458 | |
c933ea05 RS |
2459 | /* ARGS[0] should be a hook symbol. |
2460 | Call each of the functions in the hook value, passing each of them | |
2461 | as arguments all the rest of ARGS (all NARGS - 1 elements). | |
f6d62986 | 2462 | FUNCALL specifies how to call each function on the hook. |
c933ea05 RS |
2463 | The caller (or its caller, etc) must gcpro all of ARGS, |
2464 | except that it isn't necessary to gcpro ARGS[0]. */ | |
2465 | ||
f6d62986 | 2466 | Lisp_Object |
f66c7cf8 PE |
2467 | run_hook_with_args (ptrdiff_t nargs, Lisp_Object *args, |
2468 | Lisp_Object (*funcall) (ptrdiff_t nargs, Lisp_Object *args)) | |
ff936e53 | 2469 | { |
f6d62986 | 2470 | Lisp_Object sym, val, ret = Qnil; |
fada05d6 | 2471 | struct gcpro gcpro1, gcpro2, gcpro3; |
b0b667cb | 2472 | |
f029ca5f RS |
2473 | /* If we are dying or still initializing, |
2474 | don't do anything--it would probably crash if we tried. */ | |
2475 | if (NILP (Vrun_hooks)) | |
caff32a7 | 2476 | return Qnil; |
f029ca5f | 2477 | |
b0b667cb | 2478 | sym = args[0]; |
aa681b51 | 2479 | val = find_symbol_value (sym); |
ff936e53 | 2480 | |
b0b667cb | 2481 | if (EQ (val, Qunbound) || NILP (val)) |
ff936e53 | 2482 | return ret; |
03699b14 | 2483 | else if (!CONSP (val) || EQ (XCAR (val), Qlambda)) |
b0b667cb KH |
2484 | { |
2485 | args[0] = val; | |
f6d62986 | 2486 | return funcall (nargs, args); |
b0b667cb KH |
2487 | } |
2488 | else | |
2489 | { | |
1faed8ae PE |
2490 | Lisp_Object global_vals = Qnil; |
2491 | GCPRO3 (sym, val, global_vals); | |
cb9d21f8 | 2492 | |
ff936e53 | 2493 | for (; |
f6d62986 | 2494 | CONSP (val) && NILP (ret); |
03699b14 | 2495 | val = XCDR (val)) |
b0b667cb | 2496 | { |
03699b14 | 2497 | if (EQ (XCAR (val), Qt)) |
b0b667cb KH |
2498 | { |
2499 | /* t indicates this hook has a local binding; | |
2500 | it means to run the global binding too. */ | |
1faed8ae PE |
2501 | global_vals = Fdefault_value (sym); |
2502 | if (NILP (global_vals)) continue; | |
b0b667cb | 2503 | |
1faed8ae | 2504 | if (!CONSP (global_vals) || EQ (XCAR (global_vals), Qlambda)) |
b0b667cb | 2505 | { |
1faed8ae | 2506 | args[0] = global_vals; |
f6d62986 | 2507 | ret = funcall (nargs, args); |
8932b1c2 CY |
2508 | } |
2509 | else | |
2510 | { | |
2511 | for (; | |
f6d62986 | 2512 | CONSP (global_vals) && NILP (ret); |
1faed8ae | 2513 | global_vals = XCDR (global_vals)) |
8932b1c2 | 2514 | { |
1faed8ae | 2515 | args[0] = XCAR (global_vals); |
8932b1c2 CY |
2516 | /* In a global value, t should not occur. If it does, we |
2517 | must ignore it to avoid an endless loop. */ | |
2518 | if (!EQ (args[0], Qt)) | |
f6d62986 | 2519 | ret = funcall (nargs, args); |
8932b1c2 | 2520 | } |
b0b667cb KH |
2521 | } |
2522 | } | |
2523 | else | |
2524 | { | |
03699b14 | 2525 | args[0] = XCAR (val); |
f6d62986 | 2526 | ret = funcall (nargs, args); |
b0b667cb KH |
2527 | } |
2528 | } | |
cb9d21f8 RS |
2529 | |
2530 | UNGCPRO; | |
ff936e53 | 2531 | return ret; |
b0b667cb KH |
2532 | } |
2533 | } | |
c933ea05 | 2534 | |
7d48558f RS |
2535 | /* Run the hook HOOK, giving each function the two args ARG1 and ARG2. */ |
2536 | ||
2537 | void | |
d3da34e0 | 2538 | run_hook_with_args_2 (Lisp_Object hook, Lisp_Object arg1, Lisp_Object arg2) |
7d48558f RS |
2539 | { |
2540 | Lisp_Object temp[3]; | |
2541 | temp[0] = hook; | |
2542 | temp[1] = arg1; | |
2543 | temp[2] = arg2; | |
2544 | ||
2545 | Frun_hook_with_args (3, temp); | |
2546 | } | |
ff936e53 | 2547 | \f |
f6d62986 | 2548 | /* Apply fn to arg. */ |
db9f0278 | 2549 | Lisp_Object |
d3da34e0 | 2550 | apply1 (Lisp_Object fn, Lisp_Object arg) |
db9f0278 | 2551 | { |
a6e3fa71 JB |
2552 | struct gcpro gcpro1; |
2553 | ||
2554 | GCPRO1 (fn); | |
265a9e55 | 2555 | if (NILP (arg)) |
a6e3fa71 JB |
2556 | RETURN_UNGCPRO (Ffuncall (1, &fn)); |
2557 | gcpro1.nvars = 2; | |
db9f0278 JB |
2558 | { |
2559 | Lisp_Object args[2]; | |
2560 | args[0] = fn; | |
2561 | args[1] = arg; | |
a6e3fa71 JB |
2562 | gcpro1.var = args; |
2563 | RETURN_UNGCPRO (Fapply (2, args)); | |
db9f0278 | 2564 | } |
db9f0278 JB |
2565 | } |
2566 | ||
f6d62986 | 2567 | /* Call function fn on no arguments. */ |
db9f0278 | 2568 | Lisp_Object |
d3da34e0 | 2569 | call0 (Lisp_Object fn) |
db9f0278 | 2570 | { |
a6e3fa71 JB |
2571 | struct gcpro gcpro1; |
2572 | ||
2573 | GCPRO1 (fn); | |
2574 | RETURN_UNGCPRO (Ffuncall (1, &fn)); | |
db9f0278 JB |
2575 | } |
2576 | ||
f6d62986 | 2577 | /* Call function fn with 1 argument arg1. */ |
db9f0278 JB |
2578 | /* ARGSUSED */ |
2579 | Lisp_Object | |
d3da34e0 | 2580 | call1 (Lisp_Object fn, Lisp_Object arg1) |
db9f0278 | 2581 | { |
a6e3fa71 | 2582 | struct gcpro gcpro1; |
177c0ea7 | 2583 | Lisp_Object args[2]; |
a6e3fa71 | 2584 | |
db9f0278 | 2585 | args[0] = fn; |
15285f9f | 2586 | args[1] = arg1; |
a6e3fa71 JB |
2587 | GCPRO1 (args[0]); |
2588 | gcpro1.nvars = 2; | |
2589 | RETURN_UNGCPRO (Ffuncall (2, args)); | |
db9f0278 JB |
2590 | } |
2591 | ||
f6d62986 | 2592 | /* Call function fn with 2 arguments arg1, arg2. */ |
db9f0278 JB |
2593 | /* ARGSUSED */ |
2594 | Lisp_Object | |
d3da34e0 | 2595 | call2 (Lisp_Object fn, Lisp_Object arg1, Lisp_Object arg2) |
db9f0278 | 2596 | { |
a6e3fa71 | 2597 | struct gcpro gcpro1; |
db9f0278 JB |
2598 | Lisp_Object args[3]; |
2599 | args[0] = fn; | |
15285f9f RS |
2600 | args[1] = arg1; |
2601 | args[2] = arg2; | |
a6e3fa71 JB |
2602 | GCPRO1 (args[0]); |
2603 | gcpro1.nvars = 3; | |
2604 | RETURN_UNGCPRO (Ffuncall (3, args)); | |
db9f0278 JB |
2605 | } |
2606 | ||
f6d62986 | 2607 | /* Call function fn with 3 arguments arg1, arg2, arg3. */ |
db9f0278 JB |
2608 | /* ARGSUSED */ |
2609 | Lisp_Object | |
d3da34e0 | 2610 | call3 (Lisp_Object fn, Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3) |
db9f0278 | 2611 | { |
a6e3fa71 | 2612 | struct gcpro gcpro1; |
db9f0278 JB |
2613 | Lisp_Object args[4]; |
2614 | args[0] = fn; | |
15285f9f RS |
2615 | args[1] = arg1; |
2616 | args[2] = arg2; | |
2617 | args[3] = arg3; | |
a6e3fa71 JB |
2618 | GCPRO1 (args[0]); |
2619 | gcpro1.nvars = 4; | |
2620 | RETURN_UNGCPRO (Ffuncall (4, args)); | |
db9f0278 JB |
2621 | } |
2622 | ||
f6d62986 | 2623 | /* Call function fn with 4 arguments arg1, arg2, arg3, arg4. */ |
a5a44b91 JB |
2624 | /* ARGSUSED */ |
2625 | Lisp_Object | |
d3da34e0 JB |
2626 | call4 (Lisp_Object fn, Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3, |
2627 | Lisp_Object arg4) | |
a5a44b91 JB |
2628 | { |
2629 | struct gcpro gcpro1; | |
a5a44b91 JB |
2630 | Lisp_Object args[5]; |
2631 | args[0] = fn; | |
15285f9f RS |
2632 | args[1] = arg1; |
2633 | args[2] = arg2; | |
2634 | args[3] = arg3; | |
2635 | args[4] = arg4; | |
a5a44b91 JB |
2636 | GCPRO1 (args[0]); |
2637 | gcpro1.nvars = 5; | |
2638 | RETURN_UNGCPRO (Ffuncall (5, args)); | |
a5a44b91 JB |
2639 | } |
2640 | ||
f6d62986 | 2641 | /* Call function fn with 5 arguments arg1, arg2, arg3, arg4, arg5. */ |
15285f9f RS |
2642 | /* ARGSUSED */ |
2643 | Lisp_Object | |
d3da34e0 JB |
2644 | call5 (Lisp_Object fn, Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3, |
2645 | Lisp_Object arg4, Lisp_Object arg5) | |
15285f9f RS |
2646 | { |
2647 | struct gcpro gcpro1; | |
15285f9f RS |
2648 | Lisp_Object args[6]; |
2649 | args[0] = fn; | |
2650 | args[1] = arg1; | |
2651 | args[2] = arg2; | |
2652 | args[3] = arg3; | |
2653 | args[4] = arg4; | |
2654 | args[5] = arg5; | |
2655 | GCPRO1 (args[0]); | |
2656 | gcpro1.nvars = 6; | |
2657 | RETURN_UNGCPRO (Ffuncall (6, args)); | |
15285f9f RS |
2658 | } |
2659 | ||
f6d62986 | 2660 | /* Call function fn with 6 arguments arg1, arg2, arg3, arg4, arg5, arg6. */ |
15285f9f RS |
2661 | /* ARGSUSED */ |
2662 | Lisp_Object | |
d3da34e0 JB |
2663 | call6 (Lisp_Object fn, Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3, |
2664 | Lisp_Object arg4, Lisp_Object arg5, Lisp_Object arg6) | |
15285f9f RS |
2665 | { |
2666 | struct gcpro gcpro1; | |
15285f9f RS |
2667 | Lisp_Object args[7]; |
2668 | args[0] = fn; | |
2669 | args[1] = arg1; | |
2670 | args[2] = arg2; | |
2671 | args[3] = arg3; | |
2672 | args[4] = arg4; | |
2673 | args[5] = arg5; | |
2674 | args[6] = arg6; | |
2675 | GCPRO1 (args[0]); | |
2676 | gcpro1.nvars = 7; | |
2677 | RETURN_UNGCPRO (Ffuncall (7, args)); | |
15285f9f RS |
2678 | } |
2679 | ||
f6d62986 | 2680 | /* Call function fn with 7 arguments arg1, arg2, arg3, arg4, arg5, arg6, arg7. */ |
574c05e2 KK |
2681 | /* ARGSUSED */ |
2682 | Lisp_Object | |
d3da34e0 JB |
2683 | call7 (Lisp_Object fn, Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3, |
2684 | Lisp_Object arg4, Lisp_Object arg5, Lisp_Object arg6, Lisp_Object arg7) | |
574c05e2 KK |
2685 | { |
2686 | struct gcpro gcpro1; | |
574c05e2 KK |
2687 | Lisp_Object args[8]; |
2688 | args[0] = fn; | |
2689 | args[1] = arg1; | |
2690 | args[2] = arg2; | |
2691 | args[3] = arg3; | |
2692 | args[4] = arg4; | |
2693 | args[5] = arg5; | |
2694 | args[6] = arg6; | |
2695 | args[7] = arg7; | |
2696 | GCPRO1 (args[0]); | |
2697 | gcpro1.nvars = 8; | |
2698 | RETURN_UNGCPRO (Ffuncall (8, args)); | |
574c05e2 KK |
2699 | } |
2700 | ||
6c2ef893 RS |
2701 | /* The caller should GCPRO all the elements of ARGS. */ |
2702 | ||
a7ca3326 | 2703 | DEFUN ("functionp", Ffunctionp, Sfunctionp, 1, 1, 0, |
7200d79c | 2704 | doc: /* Non-nil if OBJECT is a function. */) |
c566235d | 2705 | (Lisp_Object object) |
b9598260 | 2706 | { |
e1f29348 | 2707 | if (FUNCTIONP (object)) |
b9598260 | 2708 | return Qt; |
e1f29348 | 2709 | return Qnil; |
b9598260 SM |
2710 | } |
2711 | ||
a7ca3326 | 2712 | DEFUN ("funcall", Ffuncall, Sfuncall, 1, MANY, 0, |
9dbc9081 PJ |
2713 | doc: /* Call first argument as a function, passing remaining arguments to it. |
2714 | Return the value that function returns. | |
2715 | Thus, (funcall 'cons 'x 'y) returns (x . y). | |
2716 | usage: (funcall FUNCTION &rest ARGUMENTS) */) | |
f66c7cf8 | 2717 | (ptrdiff_t nargs, Lisp_Object *args) |
db9f0278 | 2718 | { |
8788120f | 2719 | Lisp_Object fun, original_fun; |
db9f0278 | 2720 | Lisp_Object funcar; |
f66c7cf8 | 2721 | ptrdiff_t numargs = nargs - 1; |
db9f0278 JB |
2722 | Lisp_Object lisp_numargs; |
2723 | Lisp_Object val; | |
db9f0278 | 2724 | register Lisp_Object *internal_args; |
f66c7cf8 | 2725 | ptrdiff_t i; |
db9f0278 JB |
2726 | |
2727 | QUIT; | |
db9f0278 JB |
2728 | |
2729 | if (++lisp_eval_depth > max_lisp_eval_depth) | |
2730 | { | |
2731 | if (max_lisp_eval_depth < 100) | |
2732 | max_lisp_eval_depth = 100; | |
2733 | if (lisp_eval_depth > max_lisp_eval_depth) | |
921baa95 | 2734 | error ("Lisp nesting exceeds `max-lisp-eval-depth'"); |
db9f0278 JB |
2735 | } |
2736 | ||
2f592f95 SM |
2737 | /* This also GCPROs them. */ |
2738 | record_in_backtrace (args[0], &args[1], nargs - 1); | |
db9f0278 | 2739 | |
7abaf5cc SM |
2740 | /* Call GC after setting up the backtrace, so the latter GCPROs the args. */ |
2741 | maybe_gc (); | |
2742 | ||
db9f0278 JB |
2743 | if (debug_on_next_call) |
2744 | do_debug_on_call (Qlambda); | |
2745 | ||
7e63e0c3 | 2746 | check_cons_list (); |
fff3ff9c | 2747 | |
8788120f KS |
2748 | original_fun = args[0]; |
2749 | ||
db9f0278 JB |
2750 | retry: |
2751 | ||
8788120f KS |
2752 | /* Optimize for no indirection. */ |
2753 | fun = original_fun; | |
eadf1faa | 2754 | if (SYMBOLP (fun) && !NILP (fun) |
c644523b | 2755 | && (fun = XSYMBOL (fun)->function, SYMBOLP (fun))) |
8788120f | 2756 | fun = indirect_function (fun); |
db9f0278 | 2757 | |
90165123 | 2758 | if (SUBRP (fun)) |
db9f0278 | 2759 | { |
ef1b0ba7 | 2760 | if (numargs < XSUBR (fun)->min_args |
db9f0278 JB |
2761 | || (XSUBR (fun)->max_args >= 0 && XSUBR (fun)->max_args < numargs)) |
2762 | { | |
a631e24c | 2763 | XSETFASTINT (lisp_numargs, numargs); |
734d55a2 | 2764 | xsignal2 (Qwrong_number_of_arguments, original_fun, lisp_numargs); |
db9f0278 JB |
2765 | } |
2766 | ||
ef1b0ba7 | 2767 | else if (XSUBR (fun)->max_args == UNEVALLED) |
734d55a2 | 2768 | xsignal1 (Qinvalid_function, original_fun); |
db9f0278 | 2769 | |
ef1b0ba7 SM |
2770 | else if (XSUBR (fun)->max_args == MANY) |
2771 | val = (XSUBR (fun)->function.aMANY) (numargs, args + 1); | |
db9f0278 | 2772 | else |
db9f0278 | 2773 | { |
ef1b0ba7 SM |
2774 | if (XSUBR (fun)->max_args > numargs) |
2775 | { | |
38182d90 PE |
2776 | internal_args = alloca (XSUBR (fun)->max_args |
2777 | * sizeof *internal_args); | |
663e2b3f | 2778 | memcpy (internal_args, args + 1, numargs * word_size); |
ef1b0ba7 SM |
2779 | for (i = numargs; i < XSUBR (fun)->max_args; i++) |
2780 | internal_args[i] = Qnil; | |
2781 | } | |
2782 | else | |
2783 | internal_args = args + 1; | |
2784 | switch (XSUBR (fun)->max_args) | |
2785 | { | |
2786 | case 0: | |
2787 | val = (XSUBR (fun)->function.a0 ()); | |
2788 | break; | |
2789 | case 1: | |
2790 | val = (XSUBR (fun)->function.a1 (internal_args[0])); | |
2791 | break; | |
2792 | case 2: | |
2793 | val = (XSUBR (fun)->function.a2 | |
2794 | (internal_args[0], internal_args[1])); | |
2795 | break; | |
2796 | case 3: | |
2797 | val = (XSUBR (fun)->function.a3 | |
2798 | (internal_args[0], internal_args[1], internal_args[2])); | |
2799 | break; | |
2800 | case 4: | |
2801 | val = (XSUBR (fun)->function.a4 | |
2802 | (internal_args[0], internal_args[1], internal_args[2], | |
2803 | internal_args[3])); | |
2804 | break; | |
2805 | case 5: | |
2806 | val = (XSUBR (fun)->function.a5 | |
2807 | (internal_args[0], internal_args[1], internal_args[2], | |
2808 | internal_args[3], internal_args[4])); | |
2809 | break; | |
2810 | case 6: | |
2811 | val = (XSUBR (fun)->function.a6 | |
2812 | (internal_args[0], internal_args[1], internal_args[2], | |
2813 | internal_args[3], internal_args[4], internal_args[5])); | |
2814 | break; | |
2815 | case 7: | |
2816 | val = (XSUBR (fun)->function.a7 | |
2817 | (internal_args[0], internal_args[1], internal_args[2], | |
2818 | internal_args[3], internal_args[4], internal_args[5], | |
2819 | internal_args[6])); | |
2820 | break; | |
2821 | ||
2822 | case 8: | |
2823 | val = (XSUBR (fun)->function.a8 | |
2824 | (internal_args[0], internal_args[1], internal_args[2], | |
2825 | internal_args[3], internal_args[4], internal_args[5], | |
2826 | internal_args[6], internal_args[7])); | |
2827 | break; | |
2828 | ||
2829 | default: | |
2830 | ||
2831 | /* If a subr takes more than 8 arguments without using MANY | |
2832 | or UNEVALLED, we need to extend this function to support it. | |
2833 | Until this is done, there is no way to call the function. */ | |
1088b922 | 2834 | emacs_abort (); |
ef1b0ba7 | 2835 | } |
db9f0278 JB |
2836 | } |
2837 | } | |
ef1b0ba7 | 2838 | else if (COMPILEDP (fun)) |
db9f0278 JB |
2839 | val = funcall_lambda (fun, numargs, args + 1); |
2840 | else | |
2841 | { | |
eadf1faa | 2842 | if (NILP (fun)) |
734d55a2 | 2843 | xsignal1 (Qvoid_function, original_fun); |
db9f0278 | 2844 | if (!CONSP (fun)) |
734d55a2 KS |
2845 | xsignal1 (Qinvalid_function, original_fun); |
2846 | funcar = XCAR (fun); | |
90165123 | 2847 | if (!SYMBOLP (funcar)) |
734d55a2 | 2848 | xsignal1 (Qinvalid_function, original_fun); |
defb1411 SM |
2849 | if (EQ (funcar, Qlambda) |
2850 | || EQ (funcar, Qclosure)) | |
db9f0278 | 2851 | val = funcall_lambda (fun, numargs, args + 1); |
db9f0278 JB |
2852 | else if (EQ (funcar, Qautoload)) |
2853 | { | |
7abaf5cc | 2854 | Fautoload_do_load (fun, original_fun, Qnil); |
7e63e0c3 | 2855 | check_cons_list (); |
db9f0278 JB |
2856 | goto retry; |
2857 | } | |
2858 | else | |
734d55a2 | 2859 | xsignal1 (Qinvalid_function, original_fun); |
db9f0278 | 2860 | } |
7e63e0c3 | 2861 | check_cons_list (); |
db9f0278 | 2862 | lisp_eval_depth--; |
2f592f95 | 2863 | if (backtrace_debug_on_exit (specpdl_ptr - 1)) |
db9f0278 | 2864 | val = call_debugger (Fcons (Qexit, Fcons (val, Qnil))); |
2f592f95 | 2865 | specpdl_ptr--; |
db9f0278 JB |
2866 | return val; |
2867 | } | |
2868 | \f | |
2f7c71a1 | 2869 | static Lisp_Object |
defb1411 | 2870 | apply_lambda (Lisp_Object fun, Lisp_Object args) |
db9f0278 JB |
2871 | { |
2872 | Lisp_Object args_left; | |
d311d28c PE |
2873 | ptrdiff_t i; |
2874 | EMACS_INT numargs; | |
db9f0278 JB |
2875 | register Lisp_Object *arg_vector; |
2876 | struct gcpro gcpro1, gcpro2, gcpro3; | |
db9f0278 | 2877 | register Lisp_Object tem; |
3a7a9129 | 2878 | USE_SAFE_ALLOCA; |
db9f0278 | 2879 | |
f66c7cf8 | 2880 | numargs = XFASTINT (Flength (args)); |
c5101a77 | 2881 | SAFE_ALLOCA_LISP (arg_vector, numargs); |
db9f0278 JB |
2882 | args_left = args; |
2883 | ||
2884 | GCPRO3 (*arg_vector, args_left, fun); | |
2885 | gcpro1.nvars = 0; | |
2886 | ||
c5101a77 | 2887 | for (i = 0; i < numargs; ) |
db9f0278 JB |
2888 | { |
2889 | tem = Fcar (args_left), args_left = Fcdr (args_left); | |
defb1411 | 2890 | tem = eval_sub (tem); |
db9f0278 JB |
2891 | arg_vector[i++] = tem; |
2892 | gcpro1.nvars = i; | |
2893 | } | |
2894 | ||
2895 | UNGCPRO; | |
2896 | ||
2f592f95 SM |
2897 | set_backtrace_args (specpdl_ptr - 1, arg_vector); |
2898 | set_backtrace_nargs (specpdl_ptr - 1, i); | |
c5101a77 | 2899 | tem = funcall_lambda (fun, numargs, arg_vector); |
db9f0278 JB |
2900 | |
2901 | /* Do the debug-on-exit now, while arg_vector still exists. */ | |
2f592f95 SM |
2902 | if (backtrace_debug_on_exit (specpdl_ptr - 1)) |
2903 | { | |
2904 | /* Don't do it again when we return to eval. */ | |
2905 | set_backtrace_debug_on_exit (specpdl_ptr - 1, false); | |
2906 | tem = call_debugger (Fcons (Qexit, Fcons (tem, Qnil))); | |
2907 | } | |
3a7a9129 | 2908 | SAFE_FREE (); |
db9f0278 JB |
2909 | return tem; |
2910 | } | |
2911 | ||
2912 | /* Apply a Lisp function FUN to the NARGS evaluated arguments in ARG_VECTOR | |
2913 | and return the result of evaluation. | |
2914 | FUN must be either a lambda-expression or a compiled-code object. */ | |
2915 | ||
2901f1d1 | 2916 | static Lisp_Object |
f66c7cf8 | 2917 | funcall_lambda (Lisp_Object fun, ptrdiff_t nargs, |
c5101a77 | 2918 | register Lisp_Object *arg_vector) |
db9f0278 | 2919 | { |
defb1411 | 2920 | Lisp_Object val, syms_left, next, lexenv; |
d311d28c | 2921 | ptrdiff_t count = SPECPDL_INDEX (); |
f66c7cf8 | 2922 | ptrdiff_t i; |
1882aa38 | 2923 | bool optional, rest; |
db9f0278 | 2924 | |
90165123 | 2925 | if (CONSP (fun)) |
9ab90667 | 2926 | { |
defb1411 SM |
2927 | if (EQ (XCAR (fun), Qclosure)) |
2928 | { | |
2929 | fun = XCDR (fun); /* Drop `closure'. */ | |
2930 | lexenv = XCAR (fun); | |
23aba0ea | 2931 | CHECK_LIST_CONS (fun, fun); |
defb1411 SM |
2932 | } |
2933 | else | |
2934 | lexenv = Qnil; | |
9ab90667 GM |
2935 | syms_left = XCDR (fun); |
2936 | if (CONSP (syms_left)) | |
2937 | syms_left = XCAR (syms_left); | |
2938 | else | |
734d55a2 | 2939 | xsignal1 (Qinvalid_function, fun); |
9ab90667 | 2940 | } |
90165123 | 2941 | else if (COMPILEDP (fun)) |
defb1411 | 2942 | { |
798cb644 SM |
2943 | syms_left = AREF (fun, COMPILED_ARGLIST); |
2944 | if (INTEGERP (syms_left)) | |
876c194c SM |
2945 | /* A byte-code object with a non-nil `push args' slot means we |
2946 | shouldn't bind any arguments, instead just call the byte-code | |
2947 | interpreter directly; it will push arguments as necessary. | |
2948 | ||
9173deec | 2949 | Byte-code objects with either a non-existent, or a nil value for |
876c194c SM |
2950 | the `push args' slot (the default), have dynamically-bound |
2951 | arguments, and use the argument-binding code below instead (as do | |
2952 | all interpreted functions, even lexically bound ones). */ | |
2953 | { | |
2954 | /* If we have not actually read the bytecode string | |
2955 | and constants vector yet, fetch them from the file. */ | |
2956 | if (CONSP (AREF (fun, COMPILED_BYTECODE))) | |
2957 | Ffetch_bytecode (fun); | |
2958 | return exec_byte_code (AREF (fun, COMPILED_BYTECODE), | |
2959 | AREF (fun, COMPILED_CONSTANTS), | |
2960 | AREF (fun, COMPILED_STACK_DEPTH), | |
798cb644 | 2961 | syms_left, |
876c194c SM |
2962 | nargs, arg_vector); |
2963 | } | |
defb1411 SM |
2964 | lexenv = Qnil; |
2965 | } | |
9ab90667 | 2966 | else |
1088b922 | 2967 | emacs_abort (); |
db9f0278 | 2968 | |
9ab90667 GM |
2969 | i = optional = rest = 0; |
2970 | for (; CONSP (syms_left); syms_left = XCDR (syms_left)) | |
db9f0278 JB |
2971 | { |
2972 | QUIT; | |
177c0ea7 | 2973 | |
9ab90667 | 2974 | next = XCAR (syms_left); |
8788120f | 2975 | if (!SYMBOLP (next)) |
734d55a2 | 2976 | xsignal1 (Qinvalid_function, fun); |
177c0ea7 | 2977 | |
db9f0278 JB |
2978 | if (EQ (next, Qand_rest)) |
2979 | rest = 1; | |
2980 | else if (EQ (next, Qand_optional)) | |
2981 | optional = 1; | |
db9f0278 | 2982 | else |
db9f0278 | 2983 | { |
e610eaca | 2984 | Lisp_Object arg; |
defb1411 SM |
2985 | if (rest) |
2986 | { | |
e610eaca | 2987 | arg = Flist (nargs - i, &arg_vector[i]); |
defb1411 SM |
2988 | i = nargs; |
2989 | } | |
2990 | else if (i < nargs) | |
e610eaca | 2991 | arg = arg_vector[i++]; |
b9598260 SM |
2992 | else if (!optional) |
2993 | xsignal2 (Qwrong_number_of_arguments, fun, make_number (nargs)); | |
2994 | else | |
e610eaca | 2995 | arg = Qnil; |
7200d79c | 2996 | |
b9598260 | 2997 | /* Bind the argument. */ |
876c194c | 2998 | if (!NILP (lexenv) && SYMBOLP (next)) |
b9598260 | 2999 | /* Lexically bind NEXT by adding it to the lexenv alist. */ |
e610eaca | 3000 | lexenv = Fcons (Fcons (next, arg), lexenv); |
b9598260 SM |
3001 | else |
3002 | /* Dynamically bind NEXT. */ | |
e610eaca | 3003 | specbind (next, arg); |
db9f0278 | 3004 | } |
db9f0278 JB |
3005 | } |
3006 | ||
9ab90667 | 3007 | if (!NILP (syms_left)) |
734d55a2 | 3008 | xsignal1 (Qinvalid_function, fun); |
9ab90667 | 3009 | else if (i < nargs) |
734d55a2 | 3010 | xsignal2 (Qwrong_number_of_arguments, fun, make_number (nargs)); |
db9f0278 | 3011 | |
b9598260 SM |
3012 | if (!EQ (lexenv, Vinternal_interpreter_environment)) |
3013 | /* Instantiate a new lexical environment. */ | |
3014 | specbind (Qinternal_interpreter_environment, lexenv); | |
3015 | ||
90165123 | 3016 | if (CONSP (fun)) |
9ab90667 | 3017 | val = Fprogn (XCDR (XCDR (fun))); |
db9f0278 | 3018 | else |
ca248607 RS |
3019 | { |
3020 | /* If we have not actually read the bytecode string | |
3021 | and constants vector yet, fetch them from the file. */ | |
845975f5 | 3022 | if (CONSP (AREF (fun, COMPILED_BYTECODE))) |
661c7d6e | 3023 | Ffetch_bytecode (fun); |
b9598260 SM |
3024 | val = exec_byte_code (AREF (fun, COMPILED_BYTECODE), |
3025 | AREF (fun, COMPILED_CONSTANTS), | |
3026 | AREF (fun, COMPILED_STACK_DEPTH), | |
3027 | Qnil, 0, 0); | |
ca248607 | 3028 | } |
177c0ea7 | 3029 | |
db9f0278 JB |
3030 | return unbind_to (count, val); |
3031 | } | |
661c7d6e KH |
3032 | |
3033 | DEFUN ("fetch-bytecode", Ffetch_bytecode, Sfetch_bytecode, | |
9dbc9081 PJ |
3034 | 1, 1, 0, |
3035 | doc: /* If byte-compiled OBJECT is lazy-loaded, fetch it now. */) | |
5842a27b | 3036 | (Lisp_Object object) |
661c7d6e KH |
3037 | { |
3038 | Lisp_Object tem; | |
3039 | ||
845975f5 | 3040 | if (COMPILEDP (object) && CONSP (AREF (object, COMPILED_BYTECODE))) |
661c7d6e | 3041 | { |
845975f5 | 3042 | tem = read_doc_string (AREF (object, COMPILED_BYTECODE)); |
5bbdb090 | 3043 | if (!CONSP (tem)) |
845975f5 SM |
3044 | { |
3045 | tem = AREF (object, COMPILED_BYTECODE); | |
3046 | if (CONSP (tem) && STRINGP (XCAR (tem))) | |
d5db4077 | 3047 | error ("Invalid byte code in %s", SDATA (XCAR (tem))); |
845975f5 SM |
3048 | else |
3049 | error ("Invalid byte code"); | |
3050 | } | |
3ae565b3 SM |
3051 | ASET (object, COMPILED_BYTECODE, XCAR (tem)); |
3052 | ASET (object, COMPILED_CONSTANTS, XCDR (tem)); | |
661c7d6e KH |
3053 | } |
3054 | return object; | |
3055 | } | |
db9f0278 | 3056 | \f |
2f592f95 SM |
3057 | /* Return true if SYMBOL currently has a let-binding |
3058 | which was made in the buffer that is now current. */ | |
3059 | ||
3060 | bool | |
3061 | let_shadows_buffer_binding_p (struct Lisp_Symbol *symbol) | |
db9f0278 | 3062 | { |
9349e5f7 | 3063 | union specbinding *p; |
2f592f95 SM |
3064 | Lisp_Object buf = Fcurrent_buffer (); |
3065 | ||
3066 | for (p = specpdl_ptr; p > specpdl; ) | |
3067 | if ((--p)->kind > SPECPDL_LET) | |
3068 | { | |
3069 | struct Lisp_Symbol *let_bound_symbol = XSYMBOL (specpdl_symbol (p)); | |
3070 | eassert (let_bound_symbol->redirect != SYMBOL_VARALIAS); | |
3071 | if (symbol == let_bound_symbol | |
3072 | && EQ (specpdl_where (p), buf)) | |
3073 | return 1; | |
3074 | } | |
3075 | ||
3076 | return 0; | |
3077 | } | |
3078 | ||
3079 | bool | |
3080 | let_shadows_global_binding_p (Lisp_Object symbol) | |
3081 | { | |
9349e5f7 | 3082 | union specbinding *p; |
2f592f95 SM |
3083 | |
3084 | for (p = specpdl_ptr; p > specpdl; ) | |
3085 | if ((--p)->kind >= SPECPDL_LET && EQ (specpdl_symbol (p), symbol)) | |
3086 | return 1; | |
3087 | ||
3088 | return 0; | |
db9f0278 JB |
3089 | } |
3090 | ||
f6d62986 | 3091 | /* `specpdl_ptr->symbol' is a field which describes which variable is |
4e2db1fe SM |
3092 | let-bound, so it can be properly undone when we unbind_to. |
3093 | It can have the following two shapes: | |
3094 | - SYMBOL : if it's a plain symbol, it means that we have let-bound | |
3095 | a symbol that is not buffer-local (at least at the time | |
3096 | the let binding started). Note also that it should not be | |
3097 | aliased (i.e. when let-binding V1 that's aliased to V2, we want | |
3098 | to record V2 here). | |
3099 | - (SYMBOL WHERE . BUFFER) : this means that it is a let-binding for | |
3100 | variable SYMBOL which can be buffer-local. WHERE tells us | |
3101 | which buffer is affected (or nil if the let-binding affects the | |
3102 | global value of the variable) and BUFFER tells us which buffer was | |
3103 | current (i.e. if WHERE is non-nil, then BUFFER==WHERE, otherwise | |
3104 | BUFFER did not yet have a buffer-local value). */ | |
3105 | ||
db9f0278 | 3106 | void |
d3da34e0 | 3107 | specbind (Lisp_Object symbol, Lisp_Object value) |
db9f0278 | 3108 | { |
ce5b453a SM |
3109 | struct Lisp_Symbol *sym; |
3110 | ||
b7826503 | 3111 | CHECK_SYMBOL (symbol); |
ce5b453a | 3112 | sym = XSYMBOL (symbol); |
db9f0278 JB |
3113 | if (specpdl_ptr == specpdl + specpdl_size) |
3114 | grow_specpdl (); | |
719177b3 | 3115 | |
ce5b453a SM |
3116 | start: |
3117 | switch (sym->redirect) | |
719177b3 | 3118 | { |
ce5b453a SM |
3119 | case SYMBOL_VARALIAS: |
3120 | sym = indirect_variable (sym); XSETSYMBOL (symbol, sym); goto start; | |
3121 | case SYMBOL_PLAINVAL: | |
bb8e180f AS |
3122 | /* The most common case is that of a non-constant symbol with a |
3123 | trivial value. Make that as fast as we can. */ | |
9349e5f7 PE |
3124 | specpdl_ptr->let.kind = SPECPDL_LET; |
3125 | specpdl_ptr->let.symbol = symbol; | |
3126 | specpdl_ptr->let.old_value = SYMBOL_VAL (sym); | |
bb8e180f AS |
3127 | ++specpdl_ptr; |
3128 | if (!sym->constant) | |
3129 | SET_SYMBOL_VAL (sym, value); | |
3130 | else | |
3131 | set_internal (symbol, value, Qnil, 1); | |
3132 | break; | |
4e2db1fe SM |
3133 | case SYMBOL_LOCALIZED: |
3134 | if (SYMBOL_BLV (sym)->frame_local) | |
3135 | error ("Frame-local vars cannot be let-bound"); | |
3136 | case SYMBOL_FORWARDED: | |
ce5b453a SM |
3137 | { |
3138 | Lisp_Object ovalue = find_symbol_value (symbol); | |
9349e5f7 PE |
3139 | specpdl_ptr->let.kind = SPECPDL_LET_LOCAL; |
3140 | specpdl_ptr->let.symbol = symbol; | |
3141 | specpdl_ptr->let.old_value = ovalue; | |
3142 | specpdl_ptr->let.where = Fcurrent_buffer (); | |
ce5b453a SM |
3143 | |
3144 | eassert (sym->redirect != SYMBOL_LOCALIZED | |
2f592f95 | 3145 | || (EQ (SYMBOL_BLV (sym)->where, Fcurrent_buffer ()))); |
ce5b453a | 3146 | |
2f592f95 SM |
3147 | if (sym->redirect == SYMBOL_LOCALIZED) |
3148 | { | |
3149 | if (!blv_found (SYMBOL_BLV (sym))) | |
9349e5f7 | 3150 | specpdl_ptr->let.kind = SPECPDL_LET_DEFAULT; |
2f592f95 SM |
3151 | } |
3152 | else if (BUFFER_OBJFWDP (SYMBOL_FWD (sym))) | |
ce5b453a | 3153 | { |
ce5b453a SM |
3154 | /* If SYMBOL is a per-buffer variable which doesn't have a |
3155 | buffer-local value here, make the `let' change the global | |
3156 | value by changing the value of SYMBOL in all buffers not | |
3157 | having their own value. This is consistent with what | |
3158 | happens with other buffer-local variables. */ | |
2f592f95 | 3159 | if (NILP (Flocal_variable_p (symbol, Qnil))) |
ce5b453a | 3160 | { |
9349e5f7 | 3161 | specpdl_ptr->let.kind = SPECPDL_LET_DEFAULT; |
ce5b453a SM |
3162 | ++specpdl_ptr; |
3163 | Fset_default (symbol, value); | |
3164 | return; | |
3165 | } | |
3166 | } | |
3167 | else | |
9349e5f7 | 3168 | specpdl_ptr->let.kind = SPECPDL_LET; |
ce5b453a SM |
3169 | |
3170 | specpdl_ptr++; | |
94b612ad | 3171 | set_internal (symbol, value, Qnil, 1); |
ce5b453a SM |
3172 | break; |
3173 | } | |
1088b922 | 3174 | default: emacs_abort (); |
9ab90667 | 3175 | } |
db9f0278 JB |
3176 | } |
3177 | ||
3178 | void | |
d3da34e0 | 3179 | record_unwind_protect (Lisp_Object (*function) (Lisp_Object), Lisp_Object arg) |
db9f0278 JB |
3180 | { |
3181 | if (specpdl_ptr == specpdl + specpdl_size) | |
3182 | grow_specpdl (); | |
9349e5f7 PE |
3183 | specpdl_ptr->unwind.kind = SPECPDL_UNWIND; |
3184 | specpdl_ptr->unwind.func = function; | |
3185 | specpdl_ptr->unwind.arg = arg; | |
db9f0278 JB |
3186 | specpdl_ptr++; |
3187 | } | |
3188 | ||
3189 | Lisp_Object | |
d311d28c | 3190 | unbind_to (ptrdiff_t count, Lisp_Object value) |
db9f0278 | 3191 | { |
5a073f50 KS |
3192 | Lisp_Object quitf = Vquit_flag; |
3193 | struct gcpro gcpro1, gcpro2; | |
db9f0278 | 3194 | |
5a073f50 | 3195 | GCPRO2 (value, quitf); |
db9f0278 JB |
3196 | Vquit_flag = Qnil; |
3197 | ||
3198 | while (specpdl_ptr != specpdl + count) | |
3199 | { | |
9349e5f7 PE |
3200 | /* Decrement specpdl_ptr before we do the work to unbind it, so |
3201 | that an error in unbinding won't try to unbind the same entry | |
3202 | again. Take care to copy any parts of the binding needed | |
3203 | before invoking any code that can make more bindings. */ | |
eb700b82 | 3204 | |
9349e5f7 | 3205 | specpdl_ptr--; |
611a8f8c | 3206 | |
9349e5f7 | 3207 | switch (specpdl_ptr->kind) |
719177b3 | 3208 | { |
2f592f95 | 3209 | case SPECPDL_UNWIND: |
9349e5f7 | 3210 | specpdl_func (specpdl_ptr) (specpdl_arg (specpdl_ptr)); |
2f592f95 SM |
3211 | break; |
3212 | case SPECPDL_LET: | |
3213 | /* If variable has a trivial value (no forwarding), we can | |
3214 | just set it. No need to check for constant symbols here, | |
3215 | since that was already done by specbind. */ | |
9349e5f7 | 3216 | if (XSYMBOL (specpdl_symbol (specpdl_ptr))->redirect |
2f592f95 | 3217 | == SYMBOL_PLAINVAL) |
9349e5f7 PE |
3218 | SET_SYMBOL_VAL (XSYMBOL (specpdl_symbol (specpdl_ptr)), |
3219 | specpdl_old_value (specpdl_ptr)); | |
2f592f95 SM |
3220 | else |
3221 | /* NOTE: we only ever come here if make_local_foo was used for | |
3222 | the first time on this var within this let. */ | |
9349e5f7 PE |
3223 | Fset_default (specpdl_symbol (specpdl_ptr), |
3224 | specpdl_old_value (specpdl_ptr)); | |
2f592f95 SM |
3225 | break; |
3226 | case SPECPDL_BACKTRACE: | |
3227 | break; | |
3228 | case SPECPDL_LET_LOCAL: | |
3229 | case SPECPDL_LET_DEFAULT: | |
3230 | { /* If the symbol is a list, it is really (SYMBOL WHERE | |
3231 | . CURRENT-BUFFER) where WHERE is either nil, a buffer, or a | |
3232 | frame. If WHERE is a buffer or frame, this indicates we | |
3233 | bound a variable that had a buffer-local or frame-local | |
3234 | binding. WHERE nil means that the variable had the default | |
3235 | value when it was bound. CURRENT-BUFFER is the buffer that | |
3236 | was current when the variable was bound. */ | |
9349e5f7 PE |
3237 | Lisp_Object symbol = specpdl_symbol (specpdl_ptr); |
3238 | Lisp_Object where = specpdl_where (specpdl_ptr); | |
3239 | Lisp_Object old_value = specpdl_old_value (specpdl_ptr); | |
2f592f95 SM |
3240 | eassert (BUFFERP (where)); |
3241 | ||
9349e5f7 PE |
3242 | if (specpdl_ptr->kind == SPECPDL_LET_DEFAULT) |
3243 | Fset_default (symbol, old_value); | |
2f592f95 SM |
3244 | /* If this was a local binding, reset the value in the appropriate |
3245 | buffer, but only if that buffer's binding still exists. */ | |
3246 | else if (!NILP (Flocal_variable_p (symbol, where))) | |
9349e5f7 | 3247 | set_internal (symbol, old_value, where, 1); |
2f592f95 SM |
3248 | } |
3249 | break; | |
719177b3 | 3250 | } |
db9f0278 | 3251 | } |
177c0ea7 | 3252 | |
5a073f50 KS |
3253 | if (NILP (Vquit_flag) && !NILP (quitf)) |
3254 | Vquit_flag = quitf; | |
db9f0278 JB |
3255 | |
3256 | UNGCPRO; | |
db9f0278 JB |
3257 | return value; |
3258 | } | |
b9598260 | 3259 | |
4a330052 | 3260 | DEFUN ("special-variable-p", Fspecial_variable_p, Sspecial_variable_p, 1, 1, 0, |
b9598260 SM |
3261 | doc: /* Return non-nil if SYMBOL's global binding has been declared special. |
3262 | A special variable is one that will be bound dynamically, even in a | |
3263 | context where binding is lexical by default. */) | |
c566235d | 3264 | (Lisp_Object symbol) |
b9598260 SM |
3265 | { |
3266 | CHECK_SYMBOL (symbol); | |
3267 | return XSYMBOL (symbol)->declared_special ? Qt : Qnil; | |
3268 | } | |
3269 | ||
db9f0278 | 3270 | \f |
db9f0278 | 3271 | DEFUN ("backtrace-debug", Fbacktrace_debug, Sbacktrace_debug, 2, 2, 0, |
9dbc9081 PJ |
3272 | doc: /* Set the debug-on-exit flag of eval frame LEVEL levels down to FLAG. |
3273 | The debugger is entered when that frame exits, if the flag is non-nil. */) | |
5842a27b | 3274 | (Lisp_Object level, Lisp_Object flag) |
db9f0278 | 3275 | { |
9349e5f7 | 3276 | union specbinding *pdl = backtrace_top (); |
d311d28c | 3277 | register EMACS_INT i; |
db9f0278 | 3278 | |
b7826503 | 3279 | CHECK_NUMBER (level); |
db9f0278 | 3280 | |
2f592f95 SM |
3281 | for (i = 0; backtrace_p (pdl) && i < XINT (level); i++) |
3282 | pdl = backtrace_next (pdl); | |
db9f0278 | 3283 | |
2f592f95 SM |
3284 | if (backtrace_p (pdl)) |
3285 | set_backtrace_debug_on_exit (pdl, !NILP (flag)); | |
db9f0278 JB |
3286 | |
3287 | return flag; | |
3288 | } | |
3289 | ||
3290 | DEFUN ("backtrace", Fbacktrace, Sbacktrace, 0, 0, "", | |
9dbc9081 PJ |
3291 | doc: /* Print a trace of Lisp function calls currently active. |
3292 | Output stream used is value of `standard-output'. */) | |
5842a27b | 3293 | (void) |
db9f0278 | 3294 | { |
9349e5f7 | 3295 | union specbinding *pdl = backtrace_top (); |
db9f0278 | 3296 | Lisp_Object tem; |
d4b6d95d | 3297 | Lisp_Object old_print_level = Vprint_level; |
db9f0278 | 3298 | |
d4b6d95d LMI |
3299 | if (NILP (Vprint_level)) |
3300 | XSETFASTINT (Vprint_level, 8); | |
db9f0278 | 3301 | |
2f592f95 | 3302 | while (backtrace_p (pdl)) |
db9f0278 | 3303 | { |
2f592f95 SM |
3304 | write_string (backtrace_debug_on_exit (pdl) ? "* " : " ", 2); |
3305 | if (backtrace_nargs (pdl) == UNEVALLED) | |
db9f0278 | 3306 | { |
2f592f95 SM |
3307 | Fprin1 (Fcons (backtrace_function (pdl), *backtrace_args (pdl)), |
3308 | Qnil); | |
b6703b02 | 3309 | write_string ("\n", -1); |
db9f0278 JB |
3310 | } |
3311 | else | |
3312 | { | |
2f592f95 | 3313 | tem = backtrace_function (pdl); |
f6d62986 | 3314 | Fprin1 (tem, Qnil); /* This can QUIT. */ |
db9f0278 | 3315 | write_string ("(", -1); |
2f592f95 SM |
3316 | { |
3317 | ptrdiff_t i; | |
3318 | for (i = 0; i < backtrace_nargs (pdl); i++) | |
3319 | { | |
3320 | if (i) write_string (" ", -1); | |
3321 | Fprin1 (backtrace_args (pdl)[i], Qnil); | |
3322 | } | |
3323 | } | |
b6703b02 | 3324 | write_string (")\n", -1); |
db9f0278 | 3325 | } |
2f592f95 | 3326 | pdl = backtrace_next (pdl); |
db9f0278 JB |
3327 | } |
3328 | ||
d4b6d95d | 3329 | Vprint_level = old_print_level; |
db9f0278 JB |
3330 | return Qnil; |
3331 | } | |
3332 | ||
17401c97 | 3333 | DEFUN ("backtrace-frame", Fbacktrace_frame, Sbacktrace_frame, 1, 1, NULL, |
9dbc9081 PJ |
3334 | doc: /* Return the function and arguments NFRAMES up from current execution point. |
3335 | If that frame has not evaluated the arguments yet (or is a special form), | |
3336 | the value is (nil FUNCTION ARG-FORMS...). | |
3337 | If that frame has evaluated its arguments and called its function already, | |
3338 | the value is (t FUNCTION ARG-VALUES...). | |
3339 | A &rest arg is represented as the tail of the list ARG-VALUES. | |
3340 | FUNCTION is whatever was supplied as car of evaluated list, | |
3341 | or a lambda expression for macro calls. | |
3342 | If NFRAMES is more than the number of frames, the value is nil. */) | |
5842a27b | 3343 | (Lisp_Object nframes) |
db9f0278 | 3344 | { |
9349e5f7 | 3345 | union specbinding *pdl = backtrace_top (); |
5d5d959d | 3346 | register EMACS_INT i; |
db9f0278 | 3347 | |
b7826503 | 3348 | CHECK_NATNUM (nframes); |
db9f0278 JB |
3349 | |
3350 | /* Find the frame requested. */ | |
2f592f95 SM |
3351 | for (i = 0; backtrace_p (pdl) && i < XFASTINT (nframes); i++) |
3352 | pdl = backtrace_next (pdl); | |
db9f0278 | 3353 | |
2f592f95 | 3354 | if (!backtrace_p (pdl)) |
db9f0278 | 3355 | return Qnil; |
2f592f95 SM |
3356 | if (backtrace_nargs (pdl) == UNEVALLED) |
3357 | return Fcons (Qnil, | |
3358 | Fcons (backtrace_function (pdl), *backtrace_args (pdl))); | |
db9f0278 JB |
3359 | else |
3360 | { | |
2f592f95 | 3361 | Lisp_Object tem = Flist (backtrace_nargs (pdl), backtrace_args (pdl)); |
db9f0278 | 3362 | |
2f592f95 | 3363 | return Fcons (Qt, Fcons (backtrace_function (pdl), tem)); |
db9f0278 JB |
3364 | } |
3365 | } | |
a2ff3819 | 3366 | |
db9f0278 | 3367 | \f |
4ce0541e | 3368 | void |
2f592f95 | 3369 | mark_specpdl (void) |
4ce0541e | 3370 | { |
9349e5f7 | 3371 | union specbinding *pdl; |
2f592f95 | 3372 | for (pdl = specpdl; pdl != specpdl_ptr; pdl++) |
4ce0541e | 3373 | { |
2f592f95 SM |
3374 | switch (pdl->kind) |
3375 | { | |
3376 | case SPECPDL_UNWIND: | |
3377 | mark_object (specpdl_arg (pdl)); | |
3378 | break; | |
9349e5f7 | 3379 | |
2f592f95 SM |
3380 | case SPECPDL_BACKTRACE: |
3381 | { | |
3382 | ptrdiff_t nargs = backtrace_nargs (pdl); | |
3383 | mark_object (backtrace_function (pdl)); | |
3384 | if (nargs == UNEVALLED) | |
3385 | nargs = 1; | |
3386 | while (nargs--) | |
3387 | mark_object (backtrace_args (pdl)[nargs]); | |
3388 | } | |
3389 | break; | |
9349e5f7 | 3390 | |
2f592f95 SM |
3391 | case SPECPDL_LET_DEFAULT: |
3392 | case SPECPDL_LET_LOCAL: | |
3393 | mark_object (specpdl_where (pdl)); | |
9349e5f7 | 3394 | /* Fall through. */ |
2f592f95 SM |
3395 | case SPECPDL_LET: |
3396 | mark_object (specpdl_symbol (pdl)); | |
3397 | mark_object (specpdl_old_value (pdl)); | |
9349e5f7 | 3398 | break; |
2f592f95 SM |
3399 | } |
3400 | } | |
3401 | } | |
3402 | ||
3403 | void | |
3404 | get_backtrace (Lisp_Object array) | |
3405 | { | |
9349e5f7 | 3406 | union specbinding *pdl = backtrace_next (backtrace_top ()); |
2f592f95 | 3407 | ptrdiff_t i = 0, asize = ASIZE (array); |
4ce0541e | 3408 | |
2f592f95 SM |
3409 | /* Copy the backtrace contents into working memory. */ |
3410 | for (; i < asize; i++) | |
3411 | { | |
3412 | if (backtrace_p (pdl)) | |
3413 | { | |
3414 | ASET (array, i, backtrace_function (pdl)); | |
3415 | pdl = backtrace_next (pdl); | |
3416 | } | |
4ce0541e | 3417 | else |
2f592f95 | 3418 | ASET (array, i, Qnil); |
4ce0541e SM |
3419 | } |
3420 | } | |
2f592f95 SM |
3421 | |
3422 | Lisp_Object backtrace_top_function (void) | |
3423 | { | |
9349e5f7 | 3424 | union specbinding *pdl = backtrace_top (); |
2f592f95 SM |
3425 | return (backtrace_p (pdl) ? backtrace_function (pdl) : Qnil); |
3426 | } | |
4ce0541e | 3427 | |
dfcf069d | 3428 | void |
d3da34e0 | 3429 | syms_of_eval (void) |
db9f0278 | 3430 | { |
29208e82 | 3431 | DEFVAR_INT ("max-specpdl-size", max_specpdl_size, |
fb7ada5f | 3432 | doc: /* Limit on number of Lisp variable bindings and `unwind-protect's. |
9f5903bb | 3433 | If Lisp code tries to increase the total number past this amount, |
2520dc0c RS |
3434 | an error is signaled. |
3435 | You can safely use a value considerably larger than the default value, | |
3436 | if that proves inconveniently small. However, if you increase it too far, | |
3437 | Emacs could run out of memory trying to make the stack bigger. */); | |
db9f0278 | 3438 | |
29208e82 | 3439 | DEFVAR_INT ("max-lisp-eval-depth", max_lisp_eval_depth, |
fb7ada5f | 3440 | doc: /* Limit on depth in `eval', `apply' and `funcall' before error. |
2520dc0c RS |
3441 | |
3442 | This limit serves to catch infinite recursions for you before they cause | |
9dbc9081 PJ |
3443 | actual stack overflow in C, which would be fatal for Emacs. |
3444 | You can safely make it considerably larger than its default value, | |
2520dc0c RS |
3445 | if that proves inconveniently small. However, if you increase it too far, |
3446 | Emacs could overflow the real C stack, and crash. */); | |
db9f0278 | 3447 | |
29208e82 | 3448 | DEFVAR_LISP ("quit-flag", Vquit_flag, |
9dbc9081 | 3449 | doc: /* Non-nil causes `eval' to abort, unless `inhibit-quit' is non-nil. |
42ed718e RS |
3450 | If the value is t, that means do an ordinary quit. |
3451 | If the value equals `throw-on-input', that means quit by throwing | |
3452 | to the tag specified in `throw-on-input'; it's for handling `while-no-input'. | |
3453 | Typing C-g sets `quit-flag' to t, regardless of `inhibit-quit', | |
3454 | but `inhibit-quit' non-nil prevents anything from taking notice of that. */); | |
db9f0278 JB |
3455 | Vquit_flag = Qnil; |
3456 | ||
29208e82 | 3457 | DEFVAR_LISP ("inhibit-quit", Vinhibit_quit, |
9dbc9081 PJ |
3458 | doc: /* Non-nil inhibits C-g quitting from happening immediately. |
3459 | Note that `quit-flag' will still be set by typing C-g, | |
3460 | so a quit will be signaled as soon as `inhibit-quit' is nil. | |
3461 | To prevent this happening, set `quit-flag' to nil | |
3462 | before making `inhibit-quit' nil. */); | |
db9f0278 JB |
3463 | Vinhibit_quit = Qnil; |
3464 | ||
cd3520a4 JB |
3465 | DEFSYM (Qinhibit_quit, "inhibit-quit"); |
3466 | DEFSYM (Qautoload, "autoload"); | |
45b82ad0 | 3467 | DEFSYM (Qinhibit_debugger, "inhibit-debugger"); |
cd3520a4 JB |
3468 | DEFSYM (Qmacro, "macro"); |
3469 | DEFSYM (Qdeclare, "declare"); | |
177c0ea7 | 3470 | |
db9f0278 JB |
3471 | /* Note that the process handling also uses Qexit, but we don't want |
3472 | to staticpro it twice, so we just do it here. */ | |
cd3520a4 | 3473 | DEFSYM (Qexit, "exit"); |
b9598260 | 3474 | |
cd3520a4 JB |
3475 | DEFSYM (Qinteractive, "interactive"); |
3476 | DEFSYM (Qcommandp, "commandp"); | |
cd3520a4 JB |
3477 | DEFSYM (Qand_rest, "&rest"); |
3478 | DEFSYM (Qand_optional, "&optional"); | |
3479 | DEFSYM (Qclosure, "closure"); | |
3480 | DEFSYM (Qdebug, "debug"); | |
f01cbfdd | 3481 | |
45b82ad0 SM |
3482 | DEFVAR_LISP ("inhibit-debugger", Vinhibit_debugger, |
3483 | doc: /* Non-nil means never enter the debugger. | |
3484 | Normally set while the debugger is already active, to avoid recursive | |
3485 | invocations. */); | |
3486 | Vinhibit_debugger = Qnil; | |
3487 | ||
29208e82 | 3488 | DEFVAR_LISP ("debug-on-error", Vdebug_on_error, |
fb7ada5f | 3489 | doc: /* Non-nil means enter debugger if an error is signaled. |
9dbc9081 PJ |
3490 | Does not apply to errors handled by `condition-case' or those |
3491 | matched by `debug-ignored-errors'. | |
3492 | If the value is a list, an error only means to enter the debugger | |
3493 | if one of its condition symbols appears in the list. | |
3494 | When you evaluate an expression interactively, this variable | |
3495 | is temporarily non-nil if `eval-expression-debug-on-error' is non-nil. | |
fbbdcf2f | 3496 | The command `toggle-debug-on-error' toggles this. |
45b82ad0 | 3497 | See also the variable `debug-on-quit' and `inhibit-debugger'. */); |
128c0f66 | 3498 | Vdebug_on_error = Qnil; |
db9f0278 | 3499 | |
29208e82 | 3500 | DEFVAR_LISP ("debug-ignored-errors", Vdebug_ignored_errors, |
fb7ada5f | 3501 | doc: /* List of errors for which the debugger should not be called. |
9dbc9081 PJ |
3502 | Each element may be a condition-name or a regexp that matches error messages. |
3503 | If any element applies to a given error, that error skips the debugger | |
3504 | and just returns to top level. | |
3505 | This overrides the variable `debug-on-error'. | |
3506 | It does not apply to errors handled by `condition-case'. */); | |
fc950e09 KH |
3507 | Vdebug_ignored_errors = Qnil; |
3508 | ||
29208e82 | 3509 | DEFVAR_BOOL ("debug-on-quit", debug_on_quit, |
fb7ada5f | 3510 | doc: /* Non-nil means enter debugger if quit is signaled (C-g, for example). |
82fc29a1 | 3511 | Does not apply if quit is handled by a `condition-case'. */); |
db9f0278 JB |
3512 | debug_on_quit = 0; |
3513 | ||
29208e82 | 3514 | DEFVAR_BOOL ("debug-on-next-call", debug_on_next_call, |
9dbc9081 | 3515 | doc: /* Non-nil means enter debugger before next `eval', `apply' or `funcall'. */); |
db9f0278 | 3516 | |
29208e82 | 3517 | DEFVAR_BOOL ("debugger-may-continue", debugger_may_continue, |
9dbc9081 PJ |
3518 | doc: /* Non-nil means debugger may continue execution. |
3519 | This is nil when the debugger is called under circumstances where it | |
3520 | might not be safe to continue. */); | |
dac204bc | 3521 | debugger_may_continue = 1; |
556d7314 | 3522 | |
29208e82 | 3523 | DEFVAR_LISP ("debugger", Vdebugger, |
9dbc9081 PJ |
3524 | doc: /* Function to call to invoke debugger. |
3525 | If due to frame exit, args are `exit' and the value being returned; | |
3526 | this function's value will be returned instead of that. | |
3527 | If due to error, args are `error' and a list of the args to `signal'. | |
3528 | If due to `apply' or `funcall' entry, one arg, `lambda'. | |
3529 | If due to `eval' entry, one arg, t. */); | |
db9f0278 JB |
3530 | Vdebugger = Qnil; |
3531 | ||
29208e82 | 3532 | DEFVAR_LISP ("signal-hook-function", Vsignal_hook_function, |
9dbc9081 PJ |
3533 | doc: /* If non-nil, this is a function for `signal' to call. |
3534 | It receives the same arguments that `signal' was given. | |
3535 | The Edebug package uses this to regain control. */); | |
61ede770 RS |
3536 | Vsignal_hook_function = Qnil; |
3537 | ||
29208e82 | 3538 | DEFVAR_LISP ("debug-on-signal", Vdebug_on_signal, |
fb7ada5f | 3539 | doc: /* Non-nil means call the debugger regardless of condition handlers. |
9dbc9081 PJ |
3540 | Note that `debug-on-error', `debug-on-quit' and friends |
3541 | still determine whether to handle the particular condition. */); | |
57a6e758 | 3542 | Vdebug_on_signal = Qnil; |
61ede770 | 3543 | |
b38b1ec0 | 3544 | /* When lexical binding is being used, |
61b108cc | 3545 | Vinternal_interpreter_environment is non-nil, and contains an alist |
b38b1ec0 SM |
3546 | of lexically-bound variable, or (t), indicating an empty |
3547 | environment. The lisp name of this variable would be | |
3548 | `internal-interpreter-environment' if it weren't hidden. | |
3549 | Every element of this list can be either a cons (VAR . VAL) | |
3550 | specifying a lexical binding, or a single symbol VAR indicating | |
3551 | that this variable should use dynamic scoping. */ | |
61b108cc SM |
3552 | DEFSYM (Qinternal_interpreter_environment, |
3553 | "internal-interpreter-environment"); | |
b38b1ec0 SM |
3554 | DEFVAR_LISP ("internal-interpreter-environment", |
3555 | Vinternal_interpreter_environment, | |
b9598260 SM |
3556 | doc: /* If non-nil, the current lexical environment of the lisp interpreter. |
3557 | When lexical binding is not being used, this variable is nil. | |
3558 | A value of `(t)' indicates an empty environment, otherwise it is an | |
3559 | alist of active lexical bindings. */); | |
3560 | Vinternal_interpreter_environment = Qnil; | |
c80e3b4a | 3561 | /* Don't export this variable to Elisp, so no one can mess with it |
b38b1ec0 SM |
3562 | (Just imagine if someone makes it buffer-local). */ |
3563 | Funintern (Qinternal_interpreter_environment, Qnil); | |
b9598260 | 3564 | |
cd3520a4 | 3565 | DEFSYM (Vrun_hooks, "run-hooks"); |
db9f0278 JB |
3566 | |
3567 | staticpro (&Vautoload_queue); | |
3568 | Vautoload_queue = Qnil; | |
a2ff3819 GM |
3569 | staticpro (&Vsignaling_function); |
3570 | Vsignaling_function = Qnil; | |
db9f0278 | 3571 | |
d1f55f16 CY |
3572 | inhibit_lisp_code = Qnil; |
3573 | ||
db9f0278 JB |
3574 | defsubr (&Sor); |
3575 | defsubr (&Sand); | |
3576 | defsubr (&Sif); | |
3577 | defsubr (&Scond); | |
3578 | defsubr (&Sprogn); | |
3579 | defsubr (&Sprog1); | |
3580 | defsubr (&Sprog2); | |
3581 | defsubr (&Ssetq); | |
3582 | defsubr (&Squote); | |
3583 | defsubr (&Sfunction); | |
db9f0278 | 3584 | defsubr (&Sdefvar); |
19cebf5a | 3585 | defsubr (&Sdefvaralias); |
db9f0278 | 3586 | defsubr (&Sdefconst); |
513749ee | 3587 | defsubr (&Smake_var_non_special); |
db9f0278 JB |
3588 | defsubr (&Slet); |
3589 | defsubr (&SletX); | |
3590 | defsubr (&Swhile); | |
3591 | defsubr (&Smacroexpand); | |
3592 | defsubr (&Scatch); | |
3593 | defsubr (&Sthrow); | |
3594 | defsubr (&Sunwind_protect); | |
3595 | defsubr (&Scondition_case); | |
3596 | defsubr (&Ssignal); | |
db9f0278 JB |
3597 | defsubr (&Scommandp); |
3598 | defsubr (&Sautoload); | |
7abaf5cc | 3599 | defsubr (&Sautoload_do_load); |
db9f0278 JB |
3600 | defsubr (&Seval); |
3601 | defsubr (&Sapply); | |
3602 | defsubr (&Sfuncall); | |
ff936e53 SM |
3603 | defsubr (&Srun_hooks); |
3604 | defsubr (&Srun_hook_with_args); | |
3605 | defsubr (&Srun_hook_with_args_until_success); | |
3606 | defsubr (&Srun_hook_with_args_until_failure); | |
f6d62986 | 3607 | defsubr (&Srun_hook_wrapped); |
661c7d6e | 3608 | defsubr (&Sfetch_bytecode); |
db9f0278 JB |
3609 | defsubr (&Sbacktrace_debug); |
3610 | defsubr (&Sbacktrace); | |
3611 | defsubr (&Sbacktrace_frame); | |
4a330052 | 3612 | defsubr (&Sspecial_variable_p); |
b9598260 | 3613 | defsubr (&Sfunctionp); |
db9f0278 | 3614 | } |