1 /* Evaluator for GNU Emacs Lisp interpreter.
2 Copyright (C) 1985, 86, 87, 93, 94, 95, 99, 2000, 2001
3 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
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.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
25 #include "blockinput.h"
28 #include "dispextern.h"
31 /* This definition is duplicated in alloc.c and keyboard.c */
32 /* Putting it in lisp.h makes cc bomb out! */
36 struct backtrace
*next
;
37 Lisp_Object
*function
;
38 Lisp_Object
*args
; /* Points to vector of args. */
39 int nargs
; /* Length of vector.
40 If nargs is UNEVALLED, args points to slot holding
41 list of unevalled args */
43 /* Nonzero means call value of debugger when done with this operation. */
47 struct backtrace
*backtrace_list
;
49 /* This structure helps implement the `catch' and `throw' control
50 structure. A struct catchtag contains all the information needed
51 to restore the state of the interpreter after a non-local jump.
53 Handlers for error conditions (represented by `struct handler'
54 structures) just point to a catch tag to do the cleanup required
57 catchtag structures are chained together in the C calling stack;
58 the `next' member points to the next outer catchtag.
60 A call like (throw TAG VAL) searches for a catchtag whose `tag'
61 member is TAG, and then unbinds to it. The `val' member is used to
62 hold VAL while the stack is unwound; `val' is returned as the value
65 All the other members are concerned with restoring the interpreter
72 struct catchtag
*next
;
75 struct backtrace
*backlist
;
76 struct handler
*handlerlist
;
79 int poll_suppress_count
;
80 struct byte_stack
*byte_stack
;
83 struct catchtag
*catchlist
;
86 /* Count levels of GCPRO to detect failure to UNGCPRO. */
90 Lisp_Object Qautoload
, Qmacro
, Qexit
, Qinteractive
, Qcommandp
, Qdefun
;
91 Lisp_Object Qinhibit_quit
, Vinhibit_quit
, Vquit_flag
;
92 Lisp_Object Qand_rest
, Qand_optional
;
93 Lisp_Object Qdebug_on_error
;
96 /* This holds either the symbol `run-hooks' or nil.
97 It is nil at an early stage of startup, and when Emacs
100 Lisp_Object Vrun_hooks
;
102 /* Non-nil means record all fset's and provide's, to be undone
103 if the file being autoloaded is not fully loaded.
104 They are recorded by being consed onto the front of Vautoload_queue:
105 (FUN . ODEF) for a defun, (OFEATURES . nil) for a provide. */
107 Lisp_Object Vautoload_queue
;
109 /* Current number of specbindings allocated in specpdl. */
113 /* Pointer to beginning of specpdl. */
115 struct specbinding
*specpdl
;
117 /* Pointer to first unused element in specpdl. */
119 struct specbinding
*specpdl_ptr
;
121 /* Maximum size allowed for specpdl allocation */
123 EMACS_INT max_specpdl_size
;
125 /* Depth in Lisp evaluations and function calls. */
129 /* Maximum allowed depth in Lisp evaluations and function calls. */
131 EMACS_INT max_lisp_eval_depth
;
133 /* Nonzero means enter debugger before next function call */
135 int debug_on_next_call
;
137 /* Non-zero means debugger may continue. This is zero when the
138 debugger is called during redisplay, where it might not be safe to
139 continue the interrupted redisplay. */
141 int debugger_may_continue
;
143 /* List of conditions (non-nil atom means all) which cause a backtrace
144 if an error is handled by the command loop's error handler. */
146 Lisp_Object Vstack_trace_on_error
;
148 /* List of conditions (non-nil atom means all) which enter the debugger
149 if an error is handled by the command loop's error handler. */
151 Lisp_Object Vdebug_on_error
;
153 /* List of conditions and regexps specifying error messages which
154 do not enter the debugger even if Vdebug_on_error says they should. */
156 Lisp_Object Vdebug_ignored_errors
;
158 /* Non-nil means call the debugger even if the error will be handled. */
160 Lisp_Object Vdebug_on_signal
;
162 /* Hook for edebug to use. */
164 Lisp_Object Vsignal_hook_function
;
166 /* Nonzero means enter debugger if a quit signal
167 is handled by the command loop's error handler. */
171 /* The value of num_nonmacro_input_events as of the last time we
172 started to enter the debugger. If we decide to enter the debugger
173 again when this is still equal to num_nonmacro_input_events, then we
174 know that the debugger itself has an error, and we should just
175 signal the error instead of entering an infinite loop of debugger
178 int when_entered_debugger
;
180 Lisp_Object Vdebugger
;
182 /* The function from which the last `signal' was called. Set in
185 Lisp_Object Vsignaling_function
;
187 /* Set to non-zero while processing X events. Checked in Feval to
188 make sure the Lisp interpreter isn't called from a signal handler,
189 which is unsafe because the interpreter isn't reentrant. */
193 /* Function to process declarations in defmacro forms. */
195 Lisp_Object Vmacro_declaration_function
;
198 static Lisp_Object funcall_lambda
P_ ((Lisp_Object
, int, Lisp_Object
*));
204 specpdl
= (struct specbinding
*) xmalloc (specpdl_size
* sizeof (struct specbinding
));
205 specpdl_ptr
= specpdl
;
206 max_specpdl_size
= 600;
207 max_lisp_eval_depth
= 300;
215 specpdl_ptr
= specpdl
;
220 debug_on_next_call
= 0;
225 /* This is less than the initial value of num_nonmacro_input_events. */
226 when_entered_debugger
= -1;
233 int debug_while_redisplaying
;
234 int count
= specpdl_ptr
- specpdl
;
237 if (lisp_eval_depth
+ 20 > max_lisp_eval_depth
)
238 max_lisp_eval_depth
= lisp_eval_depth
+ 20;
240 if (specpdl_size
+ 40 > max_specpdl_size
)
241 max_specpdl_size
= specpdl_size
+ 40;
243 #ifdef HAVE_X_WINDOWS
244 if (display_hourglass_p
)
248 debug_on_next_call
= 0;
249 when_entered_debugger
= num_nonmacro_input_events
;
251 /* Resetting redisplaying_p to 0 makes sure that debug output is
252 displayed if the debugger is invoked during redisplay. */
253 debug_while_redisplaying
= redisplaying_p
;
255 specbind (intern ("debugger-may-continue"),
256 debug_while_redisplaying
? Qnil
: Qt
);
257 specbind (Qinhibit_redisplay
, Qnil
);
259 #if 0 /* Binding this prevents execution of Lisp code during
260 redisplay, which necessarily leads to display problems. */
261 specbind (Qinhibit_eval_during_redisplay
, Qt
);
264 val
= apply1 (Vdebugger
, arg
);
266 /* Interrupting redisplay and resuming it later is not safe under
267 all circumstances. So, when the debugger returns, abort the
268 interrupted redisplay by going back to the top-level. */
269 if (debug_while_redisplaying
)
272 return unbind_to (count
, val
);
276 do_debug_on_call (code
)
279 debug_on_next_call
= 0;
280 backtrace_list
->debug_on_exit
= 1;
281 call_debugger (Fcons (code
, Qnil
));
284 /* NOTE!!! Every function that can call EVAL must protect its args
285 and temporaries from garbage collection while it needs them.
286 The definition of `For' shows what you have to do. */
288 DEFUN ("or", For
, Sor
, 0, UNEVALLED
, 0,
289 doc
: /* Eval args until one of them yields non-nil, then return that value.
290 The remaining args are not evalled at all.
291 If all args return nil, return nil.
292 usage: (or CONDITIONS ...) */)
296 register Lisp_Object val
;
297 Lisp_Object args_left
;
308 val
= Feval (Fcar (args_left
));
311 args_left
= Fcdr (args_left
);
313 while (!NILP(args_left
));
319 DEFUN ("and", Fand
, Sand
, 0, UNEVALLED
, 0,
320 doc
: /* Eval args until one of them yields nil, then return nil.
321 The remaining args are not evalled at all.
322 If no arg yields nil, return the last arg's value.
323 usage: (and CONDITIONS ...) */)
327 register Lisp_Object val
;
328 Lisp_Object args_left
;
339 val
= Feval (Fcar (args_left
));
342 args_left
= Fcdr (args_left
);
344 while (!NILP(args_left
));
350 DEFUN ("if", Fif
, Sif
, 2, UNEVALLED
, 0,
351 doc
: /* If COND yields non-nil, do THEN, else do ELSE...
352 Returns the value of THEN or the value of the last of the ELSE's.
353 THEN must be one expression, but ELSE... can be zero or more expressions.
354 If COND yields nil, and there are no ELSE's, the value is nil.
355 usage: (if COND THEN ELSE...) */)
359 register Lisp_Object cond
;
363 cond
= Feval (Fcar (args
));
367 return Feval (Fcar (Fcdr (args
)));
368 return Fprogn (Fcdr (Fcdr (args
)));
371 DEFUN ("cond", Fcond
, Scond
, 0, UNEVALLED
, 0,
372 doc
: /* Try each clause until one succeeds.
373 Each clause looks like (CONDITION BODY...). CONDITION is evaluated
374 and, if the value is non-nil, this clause succeeds:
375 then the expressions in BODY are evaluated and the last one's
376 value is the value of the cond-form.
377 If no clause succeeds, cond returns nil.
378 If a clause has one element, as in (CONDITION),
379 CONDITION's value if non-nil is returned from the cond-form.
380 usage: (cond CLAUSES...) */)
384 register Lisp_Object clause
, val
;
391 clause
= Fcar (args
);
392 val
= Feval (Fcar (clause
));
395 if (!EQ (XCDR (clause
), Qnil
))
396 val
= Fprogn (XCDR (clause
));
406 DEFUN ("progn", Fprogn
, Sprogn
, 0, UNEVALLED
, 0,
407 doc
: /* Eval BODY forms sequentially and return value of last one.
408 usage: (progn BODY ...) */)
412 register Lisp_Object val
;
413 Lisp_Object args_left
;
424 val
= Feval (Fcar (args_left
));
425 args_left
= Fcdr (args_left
);
427 while (!NILP(args_left
));
433 DEFUN ("prog1", Fprog1
, Sprog1
, 1, UNEVALLED
, 0,
434 doc
: /* Eval FIRST and BODY sequentially; value from FIRST.
435 The value of FIRST is saved during the evaluation of the remaining args,
436 whose values are discarded.
437 usage: (prog1 FIRST BODY...) */)
442 register Lisp_Object args_left
;
443 struct gcpro gcpro1
, gcpro2
;
444 register int argnum
= 0;
456 val
= Feval (Fcar (args_left
));
458 Feval (Fcar (args_left
));
459 args_left
= Fcdr (args_left
);
461 while (!NILP(args_left
));
467 DEFUN ("prog2", Fprog2
, Sprog2
, 2, UNEVALLED
, 0,
468 doc
: /* Eval X, Y and BODY sequentially; value from Y.
469 The value of Y is saved during the evaluation of the remaining args,
470 whose values are discarded.
471 usage: (prog2 X Y BODY...) */)
476 register Lisp_Object args_left
;
477 struct gcpro gcpro1
, gcpro2
;
478 register int argnum
= -1;
492 val
= Feval (Fcar (args_left
));
494 Feval (Fcar (args_left
));
495 args_left
= Fcdr (args_left
);
497 while (!NILP (args_left
));
503 DEFUN ("setq", Fsetq
, Ssetq
, 0, UNEVALLED
, 0,
504 doc
: /* Set each SYM to the value of its VAL.
505 The symbols SYM are variables; they are literal (not evaluated).
506 The values VAL are expressions; they are evaluated.
507 Thus, (setq x (1+ y)) sets `x' to the value of `(1+ y)'.
508 The second VAL is not computed until after the first SYM is set, and so on;
509 each VAL can use the new value of variables set earlier in the `setq'.
510 The return value of the `setq' form is the value of the last VAL.
511 usage: (setq SYM VAL SYM VAL ...) */)
515 register Lisp_Object args_left
;
516 register Lisp_Object val
, sym
;
527 val
= Feval (Fcar (Fcdr (args_left
)));
528 sym
= Fcar (args_left
);
530 args_left
= Fcdr (Fcdr (args_left
));
532 while (!NILP(args_left
));
538 DEFUN ("quote", Fquote
, Squote
, 1, UNEVALLED
, 0,
539 doc
: /* Return the argument, without evaluating it. `(quote x)' yields `x'.
540 usage: (quote ARG) */)
547 DEFUN ("function", Ffunction
, Sfunction
, 1, UNEVALLED
, 0,
548 doc
: /* Like `quote', but preferred for objects which are functions.
549 In byte compilation, `function' causes its argument to be compiled.
550 `quote' cannot do that.
551 usage: (function ARG) */)
559 DEFUN ("interactive-p", Finteractive_p
, Sinteractive_p
, 0, 0, 0,
560 doc
: /* Return t if function in which this appears was called interactively.
561 This means that the function was called with call-interactively (which
562 includes being called as the binding of a key)
563 and input is currently coming from the keyboard (not in keyboard macro). */)
566 return interactive_p (1) ? Qt
: Qnil
;
570 /* Return 1 if function in which this appears was called
571 interactively. This means that the function was called with
572 call-interactively (which includes being called as the binding of
573 a key) and input is currently coming from the keyboard (not in
576 EXCLUDE_SUBRS_P non-zero means always return 0 if the function
577 called is a built-in. */
580 interactive_p (exclude_subrs_p
)
583 struct backtrace
*btp
;
589 btp
= backtrace_list
;
591 /* If this isn't a byte-compiled function, there may be a frame at
592 the top for Finteractive_p. If so, skip it. */
593 fun
= Findirect_function (*btp
->function
);
594 if (SUBRP (fun
) && XSUBR (fun
) == &Sinteractive_p
)
597 /* If we're running an Emacs 18-style byte-compiled function, there
598 may be a frame for Fbytecode. Now, given the strictest
599 definition, this function isn't really being called
600 interactively, but because that's the way Emacs 18 always builds
601 byte-compiled functions, we'll accept it for now. */
602 if (EQ (*btp
->function
, Qbytecode
))
605 /* If this isn't a byte-compiled function, then we may now be
606 looking at several frames for special forms. Skip past them. */
608 btp
->nargs
== UNEVALLED
)
611 /* btp now points at the frame of the innermost function that isn't
612 a special form, ignoring frames for Finteractive_p and/or
613 Fbytecode at the top. If this frame is for a built-in function
614 (such as load or eval-region) return nil. */
615 fun
= Findirect_function (*btp
->function
);
616 if (exclude_subrs_p
&& SUBRP (fun
))
619 /* btp points to the frame of a Lisp function that called interactive-p.
620 Return t if that function was called interactively. */
621 if (btp
&& btp
->next
&& EQ (*btp
->next
->function
, Qcall_interactively
))
627 DEFUN ("defun", Fdefun
, Sdefun
, 2, UNEVALLED
, 0,
628 doc
: /* Define NAME as a function.
629 The definition is (lambda ARGLIST [DOCSTRING] BODY...).
630 See also the function `interactive'.
631 usage: (defun NAME ARGLIST [DOCSTRING] BODY...) */)
635 register Lisp_Object fn_name
;
636 register Lisp_Object defn
;
638 fn_name
= Fcar (args
);
639 defn
= Fcons (Qlambda
, Fcdr (args
));
640 if (!NILP (Vpurify_flag
))
641 defn
= Fpurecopy (defn
);
642 Ffset (fn_name
, defn
);
643 LOADHIST_ATTACH (fn_name
);
647 DEFUN ("defmacro", Fdefmacro
, Sdefmacro
, 2, UNEVALLED
, 0,
648 doc
: /* Define NAME as a macro.
649 The definition is (macro lambda ARGLIST [DOCSTRING] BODY...).
650 When the macro is called, as in (NAME ARGS...),
651 the function (lambda ARGLIST BODY...) is applied to
652 the list ARGS... as it appears in the expression,
653 and the result should be a form to be evaluated instead of the original.
654 usage: (defmacro NAME ARGLIST [DOCSTRING] BODY...) */)
658 register Lisp_Object fn_name
;
659 register Lisp_Object defn
;
660 Lisp_Object lambda_list
, doc
, tail
;
662 fn_name
= Fcar (args
);
663 lambda_list
= Fcar (Fcdr (args
));
664 tail
= Fcdr (Fcdr (args
));
667 if (STRINGP (Fcar (tail
)))
673 while (CONSP (Fcar (tail
))
674 && EQ (Fcar (Fcar (tail
)), Qdeclare
))
676 if (!NILP (Vmacro_declaration_function
))
680 call2 (Vmacro_declaration_function
, fn_name
, Fcar (tail
));
688 tail
= Fcons (lambda_list
, tail
);
690 tail
= Fcons (lambda_list
, Fcons (doc
, tail
));
691 defn
= Fcons (Qmacro
, Fcons (Qlambda
, tail
));
693 if (!NILP (Vpurify_flag
))
694 defn
= Fpurecopy (defn
);
695 Ffset (fn_name
, defn
);
696 LOADHIST_ATTACH (fn_name
);
701 DEFUN ("defvaralias", Fdefvaralias
, Sdefvaralias
, 2, 2, 0,
702 doc
: /* Make SYMBOL a variable alias for symbol ALIASED.
703 Setting the value of SYMBOL will subsequently set the value of ALIASED,
704 and getting the value of SYMBOL will return the value ALIASED has.
705 ALIASED nil means remove the alias; SYMBOL is unbound after that. */)
707 Lisp_Object symbol
, aliased
;
709 struct Lisp_Symbol
*sym
;
711 CHECK_SYMBOL (symbol
);
712 CHECK_SYMBOL (aliased
);
714 if (SYMBOL_CONSTANT_P (symbol
))
715 error ("Cannot make a constant an alias");
717 sym
= XSYMBOL (symbol
);
718 sym
->indirect_variable
= 1;
719 sym
->value
= aliased
;
720 sym
->constant
= SYMBOL_CONSTANT_P (aliased
);
721 LOADHIST_ATTACH (symbol
);
727 DEFUN ("defvar", Fdefvar
, Sdefvar
, 1, UNEVALLED
, 0,
728 doc
: /* Define SYMBOL as a variable.
729 You are not required to define a variable in order to use it,
730 but the definition can supply documentation and an initial value
731 in a way that tags can recognize.
733 INITVALUE is evaluated, and used to set SYMBOL, only if SYMBOL's value is void.
734 If SYMBOL is buffer-local, its default value is what is set;
735 buffer-local values are not affected.
736 INITVALUE and DOCSTRING are optional.
737 If DOCSTRING starts with *, this variable is identified as a user option.
738 This means that M-x set-variable recognizes it.
739 See also `user-variable-p'.
740 If INITVALUE is missing, SYMBOL's value is not set.
741 usage: (defvar SYMBOL &optional INITVALUE DOCSTRING) */)
745 register Lisp_Object sym
, tem
, tail
;
749 if (!NILP (Fcdr (Fcdr (tail
))))
750 error ("too many arguments");
752 tem
= Fdefault_boundp (sym
);
756 Fset_default (sym
, Feval (Fcar (tail
)));
758 if (!NILP (Fcar (tail
)))
761 if (!NILP (Vpurify_flag
))
762 tem
= Fpurecopy (tem
);
763 Fput (sym
, Qvariable_documentation
, tem
);
765 LOADHIST_ATTACH (sym
);
768 /* A (defvar <var>) should not take precedence in the load-history over
769 an earlier (defvar <var> <val>), so only add to history if the default
770 value is still unbound. */
772 LOADHIST_ATTACH (sym
);
777 DEFUN ("defconst", Fdefconst
, Sdefconst
, 2, UNEVALLED
, 0,
778 doc
: /* Define SYMBOL as a constant variable.
779 The intent is that neither programs nor users should ever change this value.
780 Always sets the value of SYMBOL to the result of evalling INITVALUE.
781 If SYMBOL is buffer-local, its default value is what is set;
782 buffer-local values are not affected.
783 DOCSTRING is optional.
784 usage: (defconst SYMBOL INITVALUE [DOCSTRING]) */)
788 register Lisp_Object sym
, tem
;
791 if (!NILP (Fcdr (Fcdr (Fcdr (args
)))))
792 error ("too many arguments");
794 tem
= Feval (Fcar (Fcdr (args
)));
795 if (!NILP (Vpurify_flag
))
796 tem
= Fpurecopy (tem
);
797 Fset_default (sym
, tem
);
798 tem
= Fcar (Fcdr (Fcdr (args
)));
801 if (!NILP (Vpurify_flag
))
802 tem
= Fpurecopy (tem
);
803 Fput (sym
, Qvariable_documentation
, tem
);
805 LOADHIST_ATTACH (sym
);
809 DEFUN ("user-variable-p", Fuser_variable_p
, Suser_variable_p
, 1, 1, 0,
810 doc
: /* Returns t if VARIABLE is intended to be set and modified by users.
811 \(The alternative is a variable used internally in a Lisp program.)
812 Determined by whether the first character of the documentation
813 for the variable is `*' or if the variable is customizable (has a non-nil
814 value of any of `custom-type', `custom-loads' or `standard-value'
815 on its property list). */)
817 Lisp_Object variable
;
819 Lisp_Object documentation
;
821 if (!SYMBOLP (variable
))
824 documentation
= Fget (variable
, Qvariable_documentation
);
825 if (INTEGERP (documentation
) && XINT (documentation
) < 0)
827 if (STRINGP (documentation
)
828 && ((unsigned char) XSTRING (documentation
)->data
[0] == '*'))
830 /* If it is (STRING . INTEGER), a negative integer means a user variable. */
831 if (CONSP (documentation
)
832 && STRINGP (XCAR (documentation
))
833 && INTEGERP (XCDR (documentation
))
834 && XINT (XCDR (documentation
)) < 0)
837 if ((!NILP (Fget (variable
, intern ("custom-type"))))
838 || (!NILP (Fget (variable
, intern ("custom-loads"))))
839 || (!NILP (Fget (variable
, intern ("standard-value")))))
844 DEFUN ("let*", FletX
, SletX
, 1, UNEVALLED
, 0,
845 doc
: /* Bind variables according to VARLIST then eval BODY.
846 The value of the last form in BODY is returned.
847 Each element of VARLIST is a symbol (which is bound to nil)
848 or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM).
849 Each VALUEFORM can refer to the symbols already bound by this VARLIST.
850 usage: (let* VARLIST BODY...) */)
854 Lisp_Object varlist
, val
, elt
;
855 int count
= specpdl_ptr
- specpdl
;
856 struct gcpro gcpro1
, gcpro2
, gcpro3
;
858 GCPRO3 (args
, elt
, varlist
);
860 varlist
= Fcar (args
);
861 while (!NILP (varlist
))
864 elt
= Fcar (varlist
);
866 specbind (elt
, Qnil
);
867 else if (! NILP (Fcdr (Fcdr (elt
))))
869 Fcons (build_string ("`let' bindings can have only one value-form"),
873 val
= Feval (Fcar (Fcdr (elt
)));
874 specbind (Fcar (elt
), val
);
876 varlist
= Fcdr (varlist
);
879 val
= Fprogn (Fcdr (args
));
880 return unbind_to (count
, val
);
883 DEFUN ("let", Flet
, Slet
, 1, UNEVALLED
, 0,
884 doc
: /* Bind variables according to VARLIST then eval BODY.
885 The value of the last form in BODY is returned.
886 Each element of VARLIST is a symbol (which is bound to nil)
887 or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM).
888 All the VALUEFORMs are evalled before any symbols are bound.
889 usage: (let VARLIST BODY...) */)
893 Lisp_Object
*temps
, tem
;
894 register Lisp_Object elt
, varlist
;
895 int count
= specpdl_ptr
- specpdl
;
897 struct gcpro gcpro1
, gcpro2
;
899 varlist
= Fcar (args
);
901 /* Make space to hold the values to give the bound variables */
902 elt
= Flength (varlist
);
903 temps
= (Lisp_Object
*) alloca (XFASTINT (elt
) * sizeof (Lisp_Object
));
905 /* Compute the values and store them in `temps' */
907 GCPRO2 (args
, *temps
);
910 for (argnum
= 0; !NILP (varlist
); varlist
= Fcdr (varlist
))
913 elt
= Fcar (varlist
);
915 temps
[argnum
++] = Qnil
;
916 else if (! NILP (Fcdr (Fcdr (elt
))))
918 Fcons (build_string ("`let' bindings can have only one value-form"),
921 temps
[argnum
++] = Feval (Fcar (Fcdr (elt
)));
922 gcpro2
.nvars
= argnum
;
926 varlist
= Fcar (args
);
927 for (argnum
= 0; !NILP (varlist
); varlist
= Fcdr (varlist
))
929 elt
= Fcar (varlist
);
930 tem
= temps
[argnum
++];
934 specbind (Fcar (elt
), tem
);
937 elt
= Fprogn (Fcdr (args
));
938 return unbind_to (count
, elt
);
941 DEFUN ("while", Fwhile
, Swhile
, 1, UNEVALLED
, 0,
942 doc
: /* If TEST yields non-nil, eval BODY... and repeat.
943 The order of execution is thus TEST, BODY, TEST, BODY and so on
944 until TEST returns nil.
945 usage: (while TEST BODY...) */)
949 Lisp_Object test
, body
;
950 struct gcpro gcpro1
, gcpro2
;
956 while (!NILP (Feval (test
)))
966 DEFUN ("macroexpand", Fmacroexpand
, Smacroexpand
, 1, 2, 0,
967 doc
: /* Return result of expanding macros at top level of FORM.
968 If FORM is not a macro call, it is returned unchanged.
969 Otherwise, the macro is expanded and the expansion is considered
970 in place of FORM. When a non-macro-call results, it is returned.
972 The second optional arg ENVIRONMENT specifies an environment of macro
973 definitions to shadow the loaded ones for use in file byte-compilation. */)
976 Lisp_Object environment
;
978 /* With cleanups from Hallvard Furuseth. */
979 register Lisp_Object expander
, sym
, def
, tem
;
983 /* Come back here each time we expand a macro call,
984 in case it expands into another macro call. */
987 /* Set SYM, give DEF and TEM right values in case SYM is not a symbol. */
988 def
= sym
= XCAR (form
);
990 /* Trace symbols aliases to other symbols
991 until we get a symbol that is not an alias. */
992 while (SYMBOLP (def
))
996 tem
= Fassq (sym
, environment
);
999 def
= XSYMBOL (sym
)->function
;
1000 if (!EQ (def
, Qunbound
))
1005 /* Right now TEM is the result from SYM in ENVIRONMENT,
1006 and if TEM is nil then DEF is SYM's function definition. */
1009 /* SYM is not mentioned in ENVIRONMENT.
1010 Look at its function definition. */
1011 if (EQ (def
, Qunbound
) || !CONSP (def
))
1012 /* Not defined or definition not suitable */
1014 if (EQ (XCAR (def
), Qautoload
))
1016 /* Autoloading function: will it be a macro when loaded? */
1017 tem
= Fnth (make_number (4), def
);
1018 if (EQ (tem
, Qt
) || EQ (tem
, Qmacro
))
1019 /* Yes, load it and try again. */
1021 struct gcpro gcpro1
;
1023 do_autoload (def
, sym
);
1030 else if (!EQ (XCAR (def
), Qmacro
))
1032 else expander
= XCDR (def
);
1036 expander
= XCDR (tem
);
1037 if (NILP (expander
))
1040 form
= apply1 (expander
, XCDR (form
));
1045 DEFUN ("catch", Fcatch
, Scatch
, 1, UNEVALLED
, 0,
1046 doc
: /* Eval BODY allowing nonlocal exits using `throw'.
1047 TAG is evalled to get the tag to use; it must not be nil.
1049 Then the BODY is executed.
1050 Within BODY, (throw TAG) with same tag exits BODY and exits this `catch'.
1051 If no throw happens, `catch' returns the value of the last BODY form.
1052 If a throw happens, it specifies the value to return from `catch'.
1053 usage: (catch TAG BODY...) */)
1057 register Lisp_Object tag
;
1058 struct gcpro gcpro1
;
1061 tag
= Feval (Fcar (args
));
1063 return internal_catch (tag
, Fprogn
, Fcdr (args
));
1066 /* Set up a catch, then call C function FUNC on argument ARG.
1067 FUNC should return a Lisp_Object.
1068 This is how catches are done from within C code. */
1071 internal_catch (tag
, func
, arg
)
1073 Lisp_Object (*func
) ();
1076 /* This structure is made part of the chain `catchlist'. */
1079 /* Fill in the components of c, and put it on the list. */
1083 c
.backlist
= backtrace_list
;
1084 c
.handlerlist
= handlerlist
;
1085 c
.lisp_eval_depth
= lisp_eval_depth
;
1086 c
.pdlcount
= specpdl_ptr
- specpdl
;
1087 c
.poll_suppress_count
= poll_suppress_count
;
1088 c
.gcpro
= gcprolist
;
1089 c
.byte_stack
= byte_stack_list
;
1093 if (! _setjmp (c
.jmp
))
1094 c
.val
= (*func
) (arg
);
1096 /* Throw works by a longjmp that comes right here. */
1101 /* Unwind the specbind, catch, and handler stacks back to CATCH, and
1102 jump to that CATCH, returning VALUE as the value of that catch.
1104 This is the guts Fthrow and Fsignal; they differ only in the way
1105 they choose the catch tag to throw to. A catch tag for a
1106 condition-case form has a TAG of Qnil.
1108 Before each catch is discarded, unbind all special bindings and
1109 execute all unwind-protect clauses made above that catch. Unwind
1110 the handler stack as we go, so that the proper handlers are in
1111 effect for each unwind-protect clause we run. At the end, restore
1112 some static info saved in CATCH, and longjmp to the location
1115 This is used for correct unwinding in Fthrow and Fsignal. */
1118 unwind_to_catch (catch, value
)
1119 struct catchtag
*catch;
1122 register int last_time
;
1124 /* Save the value in the tag. */
1127 /* Restore the polling-suppression count. */
1128 set_poll_suppress_count (catch->poll_suppress_count
);
1132 last_time
= catchlist
== catch;
1134 /* Unwind the specpdl stack, and then restore the proper set of
1136 unbind_to (catchlist
->pdlcount
, Qnil
);
1137 handlerlist
= catchlist
->handlerlist
;
1138 catchlist
= catchlist
->next
;
1140 while (! last_time
);
1142 byte_stack_list
= catch->byte_stack
;
1143 gcprolist
= catch->gcpro
;
1146 gcpro_level
= gcprolist
->level
+ 1;
1150 backtrace_list
= catch->backlist
;
1151 lisp_eval_depth
= catch->lisp_eval_depth
;
1153 _longjmp (catch->jmp
, 1);
1156 DEFUN ("throw", Fthrow
, Sthrow
, 2, 2, 0,
1157 doc
: /* Throw to the catch for TAG and return VALUE from it.
1158 Both TAG and VALUE are evalled. */)
1160 register Lisp_Object tag
, value
;
1162 register struct catchtag
*c
;
1167 for (c
= catchlist
; c
; c
= c
->next
)
1169 if (EQ (c
->tag
, tag
))
1170 unwind_to_catch (c
, value
);
1172 tag
= Fsignal (Qno_catch
, Fcons (tag
, Fcons (value
, Qnil
)));
1177 DEFUN ("unwind-protect", Funwind_protect
, Sunwind_protect
, 1, UNEVALLED
, 0,
1178 doc
: /* Do BODYFORM, protecting with UNWINDFORMS.
1179 If BODYFORM completes normally, its value is returned
1180 after executing the UNWINDFORMS.
1181 If BODYFORM exits nonlocally, the UNWINDFORMS are executed anyway.
1182 usage: (unwind-protect BODYFORM UNWINDFORMS...) */)
1187 int count
= specpdl_ptr
- specpdl
;
1189 record_unwind_protect (0, Fcdr (args
));
1190 val
= Feval (Fcar (args
));
1191 return unbind_to (count
, val
);
1194 /* Chain of condition handlers currently in effect.
1195 The elements of this chain are contained in the stack frames
1196 of Fcondition_case and internal_condition_case.
1197 When an error is signaled (by calling Fsignal, below),
1198 this chain is searched for an element that applies. */
1200 struct handler
*handlerlist
;
1202 DEFUN ("condition-case", Fcondition_case
, Scondition_case
, 2, UNEVALLED
, 0,
1203 doc
: /* Regain control when an error is signaled.
1204 Executes BODYFORM and returns its value if no error happens.
1205 Each element of HANDLERS looks like (CONDITION-NAME BODY...)
1206 where the BODY is made of Lisp expressions.
1208 A handler is applicable to an error
1209 if CONDITION-NAME is one of the error's condition names.
1210 If an error happens, the first applicable handler is run.
1212 The car of a handler may be a list of condition names
1213 instead of a single condition name.
1215 When a handler handles an error,
1216 control returns to the condition-case and the handler BODY... is executed
1217 with VAR bound to (SIGNALED-CONDITIONS . SIGNAL-DATA).
1218 VAR may be nil; then you do not get access to the signal information.
1220 The value of the last BODY form is returned from the condition-case.
1221 See also the function `signal' for more info.
1222 usage: (condition-case VAR BODYFORM HANDLERS...) */)
1229 register Lisp_Object bodyform
, handlers
;
1230 volatile Lisp_Object var
;
1233 bodyform
= Fcar (Fcdr (args
));
1234 handlers
= Fcdr (Fcdr (args
));
1237 for (val
= handlers
; ! NILP (val
); val
= Fcdr (val
))
1243 && (SYMBOLP (XCAR (tem
))
1244 || CONSP (XCAR (tem
))))))
1245 error ("Invalid condition handler", tem
);
1250 c
.backlist
= backtrace_list
;
1251 c
.handlerlist
= handlerlist
;
1252 c
.lisp_eval_depth
= lisp_eval_depth
;
1253 c
.pdlcount
= specpdl_ptr
- specpdl
;
1254 c
.poll_suppress_count
= poll_suppress_count
;
1255 c
.gcpro
= gcprolist
;
1256 c
.byte_stack
= byte_stack_list
;
1257 if (_setjmp (c
.jmp
))
1260 specbind (h
.var
, c
.val
);
1261 val
= Fprogn (Fcdr (h
.chosen_clause
));
1263 /* Note that this just undoes the binding of h.var; whoever
1264 longjumped to us unwound the stack to c.pdlcount before
1266 unbind_to (c
.pdlcount
, Qnil
);
1273 h
.handler
= handlers
;
1274 h
.next
= handlerlist
;
1278 val
= Feval (bodyform
);
1280 handlerlist
= h
.next
;
1284 /* Call the function BFUN with no arguments, catching errors within it
1285 according to HANDLERS. If there is an error, call HFUN with
1286 one argument which is the data that describes the error:
1289 HANDLERS can be a list of conditions to catch.
1290 If HANDLERS is Qt, catch all errors.
1291 If HANDLERS is Qerror, catch all errors
1292 but allow the debugger to run if that is enabled. */
1295 internal_condition_case (bfun
, handlers
, hfun
)
1296 Lisp_Object (*bfun
) ();
1297 Lisp_Object handlers
;
1298 Lisp_Object (*hfun
) ();
1304 #if 0 /* Can't do this check anymore because realize_basic_faces has
1305 to BLOCK_INPUT, and can call Lisp. What's really needed is a
1306 flag indicating that we're currently handling a signal. */
1307 /* Since Fsignal resets this to 0, it had better be 0 now
1308 or else we have a potential bug. */
1309 if (interrupt_input_blocked
!= 0)
1315 c
.backlist
= backtrace_list
;
1316 c
.handlerlist
= handlerlist
;
1317 c
.lisp_eval_depth
= lisp_eval_depth
;
1318 c
.pdlcount
= specpdl_ptr
- specpdl
;
1319 c
.poll_suppress_count
= poll_suppress_count
;
1320 c
.gcpro
= gcprolist
;
1321 c
.byte_stack
= byte_stack_list
;
1322 if (_setjmp (c
.jmp
))
1324 return (*hfun
) (c
.val
);
1328 h
.handler
= handlers
;
1330 h
.next
= handlerlist
;
1336 handlerlist
= h
.next
;
1340 /* Like internal_condition_case but call HFUN with ARG as its argument. */
1343 internal_condition_case_1 (bfun
, arg
, handlers
, hfun
)
1344 Lisp_Object (*bfun
) ();
1346 Lisp_Object handlers
;
1347 Lisp_Object (*hfun
) ();
1355 c
.backlist
= backtrace_list
;
1356 c
.handlerlist
= handlerlist
;
1357 c
.lisp_eval_depth
= lisp_eval_depth
;
1358 c
.pdlcount
= specpdl_ptr
- specpdl
;
1359 c
.poll_suppress_count
= poll_suppress_count
;
1360 c
.gcpro
= gcprolist
;
1361 c
.byte_stack
= byte_stack_list
;
1362 if (_setjmp (c
.jmp
))
1364 return (*hfun
) (c
.val
);
1368 h
.handler
= handlers
;
1370 h
.next
= handlerlist
;
1374 val
= (*bfun
) (arg
);
1376 handlerlist
= h
.next
;
1381 /* Like internal_condition_case but call HFUN with NARGS as first,
1382 and ARGS as second argument. */
1385 internal_condition_case_2 (bfun
, nargs
, args
, handlers
, hfun
)
1386 Lisp_Object (*bfun
) ();
1389 Lisp_Object handlers
;
1390 Lisp_Object (*hfun
) ();
1398 c
.backlist
= backtrace_list
;
1399 c
.handlerlist
= handlerlist
;
1400 c
.lisp_eval_depth
= lisp_eval_depth
;
1401 c
.pdlcount
= specpdl_ptr
- specpdl
;
1402 c
.poll_suppress_count
= poll_suppress_count
;
1403 c
.gcpro
= gcprolist
;
1404 c
.byte_stack
= byte_stack_list
;
1405 if (_setjmp (c
.jmp
))
1407 return (*hfun
) (c
.val
);
1411 h
.handler
= handlers
;
1413 h
.next
= handlerlist
;
1417 val
= (*bfun
) (nargs
, args
);
1419 handlerlist
= h
.next
;
1424 static Lisp_Object find_handler_clause
P_ ((Lisp_Object
, Lisp_Object
,
1425 Lisp_Object
, Lisp_Object
,
1428 DEFUN ("signal", Fsignal
, Ssignal
, 2, 2, 0,
1429 doc
: /* Signal an error. Args are ERROR-SYMBOL and associated DATA.
1430 This function does not return.
1432 An error symbol is a symbol with an `error-conditions' property
1433 that is a list of condition names.
1434 A handler for any of those names will get to handle this signal.
1435 The symbol `error' should normally be one of them.
1437 DATA should be a list. Its elements are printed as part of the error message.
1438 If the signal is handled, DATA is made available to the handler.
1439 See also the function `condition-case'. */)
1440 (error_symbol
, data
)
1441 Lisp_Object error_symbol
, data
;
1443 /* When memory is full, ERROR-SYMBOL is nil,
1444 and DATA is (REAL-ERROR-SYMBOL . REAL-DATA). */
1445 register struct handler
*allhandlers
= handlerlist
;
1446 Lisp_Object conditions
;
1447 extern int gc_in_progress
;
1448 extern int waiting_for_input
;
1449 Lisp_Object debugger_value
;
1451 Lisp_Object real_error_symbol
;
1452 struct backtrace
*bp
;
1454 immediate_quit
= handling_signal
= 0;
1455 if (gc_in_progress
|| waiting_for_input
)
1458 TOTALLY_UNBLOCK_INPUT
;
1460 if (NILP (error_symbol
))
1461 real_error_symbol
= Fcar (data
);
1463 real_error_symbol
= error_symbol
;
1465 #ifdef HAVE_X_WINDOWS
1466 if (display_hourglass_p
)
1467 cancel_hourglass ();
1470 /* This hook is used by edebug. */
1471 if (! NILP (Vsignal_hook_function
))
1472 call2 (Vsignal_hook_function
, error_symbol
, data
);
1474 conditions
= Fget (real_error_symbol
, Qerror_conditions
);
1476 /* Remember from where signal was called. Skip over the frame for
1477 `signal' itself. If a frame for `error' follows, skip that,
1479 Vsignaling_function
= Qnil
;
1482 bp
= backtrace_list
->next
;
1483 if (bp
&& bp
->function
&& EQ (*bp
->function
, Qerror
))
1485 if (bp
&& bp
->function
)
1486 Vsignaling_function
= *bp
->function
;
1489 for (; handlerlist
; handlerlist
= handlerlist
->next
)
1491 register Lisp_Object clause
;
1493 if (lisp_eval_depth
+ 20 > max_lisp_eval_depth
)
1494 max_lisp_eval_depth
= lisp_eval_depth
+ 20;
1496 if (specpdl_size
+ 40 > max_specpdl_size
)
1497 max_specpdl_size
= specpdl_size
+ 40;
1499 clause
= find_handler_clause (handlerlist
->handler
, conditions
,
1500 error_symbol
, data
, &debugger_value
);
1502 #if 0 /* Most callers are not prepared to handle gc if this returns.
1503 So, since this feature is not very useful, take it out. */
1504 /* If have called debugger and user wants to continue,
1506 if (EQ (clause
, Qlambda
))
1507 return debugger_value
;
1509 if (EQ (clause
, Qlambda
))
1511 /* We can't return values to code which signaled an error, but we
1512 can continue code which has signaled a quit. */
1513 if (EQ (real_error_symbol
, Qquit
))
1516 error ("Cannot return from the debugger in an error");
1522 Lisp_Object unwind_data
;
1523 struct handler
*h
= handlerlist
;
1525 handlerlist
= allhandlers
;
1527 if (NILP (error_symbol
))
1530 unwind_data
= Fcons (error_symbol
, data
);
1531 h
->chosen_clause
= clause
;
1532 unwind_to_catch (h
->tag
, unwind_data
);
1536 handlerlist
= allhandlers
;
1537 /* If no handler is present now, try to run the debugger,
1538 and if that fails, throw to top level. */
1539 find_handler_clause (Qerror
, conditions
, error_symbol
, data
, &debugger_value
);
1541 Fthrow (Qtop_level
, Qt
);
1543 if (! NILP (error_symbol
))
1544 data
= Fcons (error_symbol
, data
);
1546 string
= Ferror_message_string (data
);
1547 fatal ("%s", XSTRING (string
)->data
, 0);
1550 /* Return nonzero iff LIST is a non-nil atom or
1551 a list containing one of CONDITIONS. */
1554 wants_debugger (list
, conditions
)
1555 Lisp_Object list
, conditions
;
1562 while (CONSP (conditions
))
1564 Lisp_Object
this, tail
;
1565 this = XCAR (conditions
);
1566 for (tail
= list
; CONSP (tail
); tail
= XCDR (tail
))
1567 if (EQ (XCAR (tail
), this))
1569 conditions
= XCDR (conditions
);
1574 /* Return 1 if an error with condition-symbols CONDITIONS,
1575 and described by SIGNAL-DATA, should skip the debugger
1576 according to debugger-ignored-errors. */
1579 skip_debugger (conditions
, data
)
1580 Lisp_Object conditions
, data
;
1583 int first_string
= 1;
1584 Lisp_Object error_message
;
1586 error_message
= Qnil
;
1587 for (tail
= Vdebug_ignored_errors
; CONSP (tail
); tail
= XCDR (tail
))
1589 if (STRINGP (XCAR (tail
)))
1593 error_message
= Ferror_message_string (data
);
1597 if (fast_string_match (XCAR (tail
), error_message
) >= 0)
1602 Lisp_Object contail
;
1604 for (contail
= conditions
; CONSP (contail
); contail
= XCDR (contail
))
1605 if (EQ (XCAR (tail
), XCAR (contail
)))
1613 /* Value of Qlambda means we have called debugger and user has continued.
1614 There are two ways to pass SIG and DATA:
1615 = SIG is the error symbol, and DATA is the rest of the data.
1616 = SIG is nil, and DATA is (SYMBOL . REST-OF-DATA).
1617 This is for memory-full errors only.
1619 Store value returned from debugger into *DEBUGGER_VALUE_PTR. */
1622 find_handler_clause (handlers
, conditions
, sig
, data
, debugger_value_ptr
)
1623 Lisp_Object handlers
, conditions
, sig
, data
;
1624 Lisp_Object
*debugger_value_ptr
;
1626 register Lisp_Object h
;
1627 register Lisp_Object tem
;
1629 if (EQ (handlers
, Qt
)) /* t is used by handlers for all conditions, set up by C code. */
1631 /* error is used similarly, but means print an error message
1632 and run the debugger if that is enabled. */
1633 if (EQ (handlers
, Qerror
)
1634 || !NILP (Vdebug_on_signal
)) /* This says call debugger even if
1635 there is a handler. */
1637 int count
= specpdl_ptr
- specpdl
;
1638 int debugger_called
= 0;
1639 Lisp_Object sig_symbol
, combined_data
;
1640 /* This is set to 1 if we are handling a memory-full error,
1641 because these must not run the debugger.
1642 (There is no room in memory to do that!) */
1643 int no_debugger
= 0;
1647 combined_data
= data
;
1648 sig_symbol
= Fcar (data
);
1653 combined_data
= Fcons (sig
, data
);
1657 if (wants_debugger (Vstack_trace_on_error
, conditions
))
1660 internal_with_output_to_temp_buffer ("*Backtrace*",
1661 (Lisp_Object (*) (Lisp_Object
)) Fbacktrace
,
1664 internal_with_output_to_temp_buffer ("*Backtrace*",
1669 && (EQ (sig_symbol
, Qquit
)
1671 : wants_debugger (Vdebug_on_error
, conditions
))
1672 && ! skip_debugger (conditions
, combined_data
)
1673 && when_entered_debugger
< num_nonmacro_input_events
)
1675 specbind (Qdebug_on_error
, Qnil
);
1677 = call_debugger (Fcons (Qerror
,
1678 Fcons (combined_data
, Qnil
)));
1679 debugger_called
= 1;
1681 /* If there is no handler, return saying whether we ran the debugger. */
1682 if (EQ (handlers
, Qerror
))
1684 if (debugger_called
)
1685 return unbind_to (count
, Qlambda
);
1689 for (h
= handlers
; CONSP (h
); h
= Fcdr (h
))
1691 Lisp_Object handler
, condit
;
1694 if (!CONSP (handler
))
1696 condit
= Fcar (handler
);
1697 /* Handle a single condition name in handler HANDLER. */
1698 if (SYMBOLP (condit
))
1700 tem
= Fmemq (Fcar (handler
), conditions
);
1704 /* Handle a list of condition names in handler HANDLER. */
1705 else if (CONSP (condit
))
1707 while (CONSP (condit
))
1709 tem
= Fmemq (Fcar (condit
), conditions
);
1712 condit
= XCDR (condit
);
1719 /* dump an error message; called like printf */
1723 error (m
, a1
, a2
, a3
)
1743 int used
= doprnt (buffer
, size
, m
, m
+ mlen
, 3, args
);
1748 buffer
= (char *) xrealloc (buffer
, size
);
1751 buffer
= (char *) xmalloc (size
);
1756 string
= build_string (buffer
);
1760 Fsignal (Qerror
, Fcons (string
, Qnil
));
1764 DEFUN ("commandp", Fcommandp
, Scommandp
, 1, 2, 0,
1765 doc
: /* Non-nil if FUNCTION makes provisions for interactive calling.
1766 This means it contains a description for how to read arguments to give it.
1767 The value is nil for an invalid function or a symbol with no function
1770 Interactively callable functions include strings and vectors (treated
1771 as keyboard macros), lambda-expressions that contain a top-level call
1772 to `interactive', autoload definitions made by `autoload' with non-nil
1773 fourth argument, and some of the built-in functions of Lisp.
1775 Also, a symbol satisfies `commandp' if its function definition does so.
1777 If the optional argument FOR-CALL-INTERACTIVELY is non-nil,
1778 then strins and vectors are not accepted. */)
1779 (function
, for_call_interactively
)
1780 Lisp_Object function
, for_call_interactively
;
1782 register Lisp_Object fun
;
1783 register Lisp_Object funcar
;
1787 fun
= indirect_function (fun
);
1788 if (EQ (fun
, Qunbound
))
1791 /* Emacs primitives are interactive if their DEFUN specifies an
1792 interactive spec. */
1795 if (XSUBR (fun
)->prompt
)
1801 /* Bytecode objects are interactive if they are long enough to
1802 have an element whose index is COMPILED_INTERACTIVE, which is
1803 where the interactive spec is stored. */
1804 else if (COMPILEDP (fun
))
1805 return ((ASIZE (fun
) & PSEUDOVECTOR_SIZE_MASK
) > COMPILED_INTERACTIVE
1808 /* Strings and vectors are keyboard macros. */
1809 if (NILP (for_call_interactively
) && (STRINGP (fun
) || VECTORP (fun
)))
1812 /* Lists may represent commands. */
1815 funcar
= Fcar (fun
);
1816 if (!SYMBOLP (funcar
))
1817 return Fsignal (Qinvalid_function
, Fcons (fun
, Qnil
));
1818 if (EQ (funcar
, Qlambda
))
1819 return Fassq (Qinteractive
, Fcdr (Fcdr (fun
)));
1820 if (EQ (funcar
, Qautoload
))
1821 return Fcar (Fcdr (Fcdr (Fcdr (fun
))));
1827 DEFUN ("autoload", Fautoload
, Sautoload
, 2, 5, 0,
1828 doc
: /* Define FUNCTION to autoload from FILE.
1829 FUNCTION is a symbol; FILE is a file name string to pass to `load'.
1830 Third arg DOCSTRING is documentation for the function.
1831 Fourth arg INTERACTIVE if non-nil says function can be called interactively.
1832 Fifth arg TYPE indicates the type of the object:
1833 nil or omitted says FUNCTION is a function,
1834 `keymap' says FUNCTION is really a keymap, and
1835 `macro' or t says FUNCTION is really a macro.
1836 Third through fifth args give info about the real definition.
1837 They default to nil.
1838 If FUNCTION is already defined other than as an autoload,
1839 this does nothing and returns nil. */)
1840 (function
, file
, docstring
, interactive
, type
)
1841 Lisp_Object function
, file
, docstring
, interactive
, type
;
1844 Lisp_Object args
[4];
1847 CHECK_SYMBOL (function
);
1848 CHECK_STRING (file
);
1850 /* If function is defined and not as an autoload, don't override */
1851 if (!EQ (XSYMBOL (function
)->function
, Qunbound
)
1852 && !(CONSP (XSYMBOL (function
)->function
)
1853 && EQ (XCAR (XSYMBOL (function
)->function
), Qautoload
)))
1856 if (NILP (Vpurify_flag
))
1857 /* Only add entries after dumping, because the ones before are
1858 not useful and else we get loads of them from the loaddefs.el. */
1859 LOADHIST_ATTACH (Fcons (Qautoload
, function
));
1863 args
[1] = docstring
;
1864 args
[2] = interactive
;
1867 return Ffset (function
, Fcons (Qautoload
, Flist (4, &args
[0])));
1868 #else /* NO_ARG_ARRAY */
1869 return Ffset (function
, Fcons (Qautoload
, Flist (4, &file
)));
1870 #endif /* not NO_ARG_ARRAY */
1874 un_autoload (oldqueue
)
1875 Lisp_Object oldqueue
;
1877 register Lisp_Object queue
, first
, second
;
1879 /* Queue to unwind is current value of Vautoload_queue.
1880 oldqueue is the shadowed value to leave in Vautoload_queue. */
1881 queue
= Vautoload_queue
;
1882 Vautoload_queue
= oldqueue
;
1883 while (CONSP (queue
))
1885 first
= Fcar (queue
);
1886 second
= Fcdr (first
);
1887 first
= Fcar (first
);
1888 if (EQ (second
, Qnil
))
1891 Ffset (first
, second
);
1892 queue
= Fcdr (queue
);
1897 /* Load an autoloaded function.
1898 FUNNAME is the symbol which is the function's name.
1899 FUNDEF is the autoload definition (a list). */
1902 do_autoload (fundef
, funname
)
1903 Lisp_Object fundef
, funname
;
1905 int count
= specpdl_ptr
- specpdl
;
1906 Lisp_Object fun
, queue
, first
, second
;
1907 struct gcpro gcpro1
, gcpro2
, gcpro3
;
1909 if (! NILP (Vpurify_flag
))
1910 error ("Attempt to autoload %s while preparing to dump",
1911 XSYMBOL (funname
)->name
->data
);
1914 CHECK_SYMBOL (funname
);
1915 GCPRO3 (fun
, funname
, fundef
);
1917 /* Preserve the match data. */
1918 record_unwind_protect (Fset_match_data
, Fmatch_data (Qnil
, Qnil
));
1920 /* Value saved here is to be restored into Vautoload_queue. */
1921 record_unwind_protect (un_autoload
, Vautoload_queue
);
1922 Vautoload_queue
= Qt
;
1923 Fload (Fcar (Fcdr (fundef
)), Qnil
, noninteractive
? Qt
: Qnil
, Qnil
, Qt
);
1925 /* Save the old autoloads, in case we ever do an unload. */
1926 queue
= Vautoload_queue
;
1927 while (CONSP (queue
))
1929 first
= Fcar (queue
);
1930 second
= Fcdr (first
);
1931 first
= Fcar (first
);
1933 /* Note: This test is subtle. The cdr of an autoload-queue entry
1934 may be an atom if the autoload entry was generated by a defalias
1937 Fput (first
, Qautoload
, (Fcdr (second
)));
1939 queue
= Fcdr (queue
);
1942 /* Once loading finishes, don't undo it. */
1943 Vautoload_queue
= Qt
;
1944 unbind_to (count
, Qnil
);
1946 fun
= Findirect_function (fun
);
1948 if (!NILP (Fequal (fun
, fundef
)))
1949 error ("Autoloading failed to define function %s",
1950 XSYMBOL (funname
)->name
->data
);
1955 DEFUN ("eval", Feval
, Seval
, 1, 1, 0,
1956 doc
: /* Evaluate FORM and return its value. */)
1960 Lisp_Object fun
, val
, original_fun
, original_args
;
1962 struct backtrace backtrace
;
1963 struct gcpro gcpro1
, gcpro2
, gcpro3
;
1965 if (handling_signal
)
1969 return Fsymbol_value (form
);
1974 if (consing_since_gc
> gc_cons_threshold
)
1977 Fgarbage_collect ();
1981 if (++lisp_eval_depth
> max_lisp_eval_depth
)
1983 if (max_lisp_eval_depth
< 100)
1984 max_lisp_eval_depth
= 100;
1985 if (lisp_eval_depth
> max_lisp_eval_depth
)
1986 error ("Lisp nesting exceeds max-lisp-eval-depth");
1989 original_fun
= Fcar (form
);
1990 original_args
= Fcdr (form
);
1992 backtrace
.next
= backtrace_list
;
1993 backtrace_list
= &backtrace
;
1994 backtrace
.function
= &original_fun
; /* This also protects them from gc */
1995 backtrace
.args
= &original_args
;
1996 backtrace
.nargs
= UNEVALLED
;
1997 backtrace
.evalargs
= 1;
1998 backtrace
.debug_on_exit
= 0;
2000 if (debug_on_next_call
)
2001 do_debug_on_call (Qt
);
2003 /* At this point, only original_fun and original_args
2004 have values that will be used below */
2006 fun
= Findirect_function (original_fun
);
2010 Lisp_Object numargs
;
2011 Lisp_Object argvals
[8];
2012 Lisp_Object args_left
;
2013 register int i
, maxargs
;
2015 args_left
= original_args
;
2016 numargs
= Flength (args_left
);
2018 if (XINT (numargs
) < XSUBR (fun
)->min_args
||
2019 (XSUBR (fun
)->max_args
>= 0 && XSUBR (fun
)->max_args
< XINT (numargs
)))
2020 return Fsignal (Qwrong_number_of_arguments
, Fcons (fun
, Fcons (numargs
, Qnil
)));
2022 if (XSUBR (fun
)->max_args
== UNEVALLED
)
2024 backtrace
.evalargs
= 0;
2025 val
= (*XSUBR (fun
)->function
) (args_left
);
2029 if (XSUBR (fun
)->max_args
== MANY
)
2031 /* Pass a vector of evaluated arguments */
2033 register int argnum
= 0;
2035 vals
= (Lisp_Object
*) alloca (XINT (numargs
) * sizeof (Lisp_Object
));
2037 GCPRO3 (args_left
, fun
, fun
);
2041 while (!NILP (args_left
))
2043 vals
[argnum
++] = Feval (Fcar (args_left
));
2044 args_left
= Fcdr (args_left
);
2045 gcpro3
.nvars
= argnum
;
2048 backtrace
.args
= vals
;
2049 backtrace
.nargs
= XINT (numargs
);
2051 val
= (*XSUBR (fun
)->function
) (XINT (numargs
), vals
);
2056 GCPRO3 (args_left
, fun
, fun
);
2057 gcpro3
.var
= argvals
;
2060 maxargs
= XSUBR (fun
)->max_args
;
2061 for (i
= 0; i
< maxargs
; args_left
= Fcdr (args_left
))
2063 argvals
[i
] = Feval (Fcar (args_left
));
2069 backtrace
.args
= argvals
;
2070 backtrace
.nargs
= XINT (numargs
);
2075 val
= (*XSUBR (fun
)->function
) ();
2078 val
= (*XSUBR (fun
)->function
) (argvals
[0]);
2081 val
= (*XSUBR (fun
)->function
) (argvals
[0], argvals
[1]);
2084 val
= (*XSUBR (fun
)->function
) (argvals
[0], argvals
[1],
2088 val
= (*XSUBR (fun
)->function
) (argvals
[0], argvals
[1],
2089 argvals
[2], argvals
[3]);
2092 val
= (*XSUBR (fun
)->function
) (argvals
[0], argvals
[1], argvals
[2],
2093 argvals
[3], argvals
[4]);
2096 val
= (*XSUBR (fun
)->function
) (argvals
[0], argvals
[1], argvals
[2],
2097 argvals
[3], argvals
[4], argvals
[5]);
2100 val
= (*XSUBR (fun
)->function
) (argvals
[0], argvals
[1], argvals
[2],
2101 argvals
[3], argvals
[4], argvals
[5],
2106 val
= (*XSUBR (fun
)->function
) (argvals
[0], argvals
[1], argvals
[2],
2107 argvals
[3], argvals
[4], argvals
[5],
2108 argvals
[6], argvals
[7]);
2112 /* Someone has created a subr that takes more arguments than
2113 is supported by this code. We need to either rewrite the
2114 subr to use a different argument protocol, or add more
2115 cases to this switch. */
2119 if (COMPILEDP (fun
))
2120 val
= apply_lambda (fun
, original_args
, 1);
2124 return Fsignal (Qinvalid_function
, Fcons (fun
, Qnil
));
2125 funcar
= Fcar (fun
);
2126 if (!SYMBOLP (funcar
))
2127 return Fsignal (Qinvalid_function
, Fcons (fun
, Qnil
));
2128 if (EQ (funcar
, Qautoload
))
2130 do_autoload (fun
, original_fun
);
2133 if (EQ (funcar
, Qmacro
))
2134 val
= Feval (apply1 (Fcdr (fun
), original_args
));
2135 else if (EQ (funcar
, Qlambda
))
2136 val
= apply_lambda (fun
, original_args
, 1);
2138 return Fsignal (Qinvalid_function
, Fcons (fun
, Qnil
));
2142 if (backtrace
.debug_on_exit
)
2143 val
= call_debugger (Fcons (Qexit
, Fcons (val
, Qnil
)));
2144 backtrace_list
= backtrace
.next
;
2148 DEFUN ("apply", Fapply
, Sapply
, 2, MANY
, 0,
2149 doc
: /* Call FUNCTION with our remaining args, using our last arg as list of args.
2150 Then return the value FUNCTION returns.
2151 Thus, (apply '+ 1 2 '(3 4)) returns 10.
2152 usage: (apply FUNCTION &rest ARGUMENTS) */)
2157 register int i
, numargs
;
2158 register Lisp_Object spread_arg
;
2159 register Lisp_Object
*funcall_args
;
2161 struct gcpro gcpro1
;
2165 spread_arg
= args
[nargs
- 1];
2166 CHECK_LIST (spread_arg
);
2168 numargs
= XINT (Flength (spread_arg
));
2171 return Ffuncall (nargs
- 1, args
);
2172 else if (numargs
== 1)
2174 args
[nargs
- 1] = XCAR (spread_arg
);
2175 return Ffuncall (nargs
, args
);
2178 numargs
+= nargs
- 2;
2180 fun
= indirect_function (fun
);
2181 if (EQ (fun
, Qunbound
))
2183 /* Let funcall get the error */
2190 if (numargs
< XSUBR (fun
)->min_args
2191 || (XSUBR (fun
)->max_args
>= 0 && XSUBR (fun
)->max_args
< numargs
))
2192 goto funcall
; /* Let funcall get the error */
2193 else if (XSUBR (fun
)->max_args
> numargs
)
2195 /* Avoid making funcall cons up a yet another new vector of arguments
2196 by explicitly supplying nil's for optional values */
2197 funcall_args
= (Lisp_Object
*) alloca ((1 + XSUBR (fun
)->max_args
)
2198 * sizeof (Lisp_Object
));
2199 for (i
= numargs
; i
< XSUBR (fun
)->max_args
;)
2200 funcall_args
[++i
] = Qnil
;
2201 GCPRO1 (*funcall_args
);
2202 gcpro1
.nvars
= 1 + XSUBR (fun
)->max_args
;
2206 /* We add 1 to numargs because funcall_args includes the
2207 function itself as well as its arguments. */
2210 funcall_args
= (Lisp_Object
*) alloca ((1 + numargs
)
2211 * sizeof (Lisp_Object
));
2212 GCPRO1 (*funcall_args
);
2213 gcpro1
.nvars
= 1 + numargs
;
2216 bcopy (args
, funcall_args
, nargs
* sizeof (Lisp_Object
));
2217 /* Spread the last arg we got. Its first element goes in
2218 the slot that it used to occupy, hence this value of I. */
2220 while (!NILP (spread_arg
))
2222 funcall_args
[i
++] = XCAR (spread_arg
);
2223 spread_arg
= XCDR (spread_arg
);
2226 RETURN_UNGCPRO (Ffuncall (gcpro1
.nvars
, funcall_args
));
2229 /* Run hook variables in various ways. */
2231 enum run_hooks_condition
{to_completion
, until_success
, until_failure
};
2232 static Lisp_Object run_hook_with_args
P_ ((int, Lisp_Object
*,
2233 enum run_hooks_condition
));
2235 DEFUN ("run-hooks", Frun_hooks
, Srun_hooks
, 0, MANY
, 0,
2236 doc
: /* Run each hook in HOOKS. Major mode functions use this.
2237 Each argument should be a symbol, a hook variable.
2238 These symbols are processed in the order specified.
2239 If a hook symbol has a non-nil value, that value may be a function
2240 or a list of functions to be called to run the hook.
2241 If the value is a function, it is called with no arguments.
2242 If it is a list, the elements are called, in order, with no arguments.
2244 Do not use `make-local-variable' to make a hook variable buffer-local.
2245 Instead, use `add-hook' and specify t for the LOCAL argument.
2246 usage: (run-hooks &rest HOOKS) */)
2251 Lisp_Object hook
[1];
2254 for (i
= 0; i
< nargs
; i
++)
2257 run_hook_with_args (1, hook
, to_completion
);
2263 DEFUN ("run-hook-with-args", Frun_hook_with_args
,
2264 Srun_hook_with_args
, 1, MANY
, 0,
2265 doc
: /* Run HOOK with the specified arguments ARGS.
2266 HOOK should be a symbol, a hook variable. If HOOK has a non-nil
2267 value, that value may be a function or a list of functions to be
2268 called to run the hook. If the value is a function, it is called with
2269 the given arguments and its return value is returned. If it is a list
2270 of functions, those functions are called, in order,
2271 with the given arguments ARGS.
2272 It is best not to depend on the value return by `run-hook-with-args',
2275 Do not use `make-local-variable' to make a hook variable buffer-local.
2276 Instead, use `add-hook' and specify t for the LOCAL argument.
2277 usage: (run-hook-with-args HOOK &rest ARGS) */)
2282 return run_hook_with_args (nargs
, args
, to_completion
);
2285 DEFUN ("run-hook-with-args-until-success", Frun_hook_with_args_until_success
,
2286 Srun_hook_with_args_until_success
, 1, MANY
, 0,
2287 doc
: /* Run HOOK with the specified arguments ARGS.
2288 HOOK should be a symbol, a hook variable. Its value should
2289 be a list of functions. We call those functions, one by one,
2290 passing arguments ARGS to each of them, until one of them
2291 returns a non-nil value. Then we return that value.
2292 If all the functions return nil, we return nil.
2294 Do not use `make-local-variable' to make a hook variable buffer-local.
2295 Instead, use `add-hook' and specify t for the LOCAL argument.
2296 usage: (run-hook-with-args-until-success HOOK &rest ARGS) */)
2301 return run_hook_with_args (nargs
, args
, until_success
);
2304 DEFUN ("run-hook-with-args-until-failure", Frun_hook_with_args_until_failure
,
2305 Srun_hook_with_args_until_failure
, 1, MANY
, 0,
2306 doc
: /* Run HOOK with the specified arguments ARGS.
2307 HOOK should be a symbol, a hook variable. Its value should
2308 be a list of functions. We call those functions, one by one,
2309 passing arguments ARGS to each of them, until one of them
2310 returns nil. Then we return nil.
2311 If all the functions return non-nil, we return non-nil.
2313 Do not use `make-local-variable' to make a hook variable buffer-local.
2314 Instead, use `add-hook' and specify t for the LOCAL argument.
2315 usage: (run-hook-with-args-until-failure HOOK &rest ARGS) */)
2320 return run_hook_with_args (nargs
, args
, until_failure
);
2323 /* ARGS[0] should be a hook symbol.
2324 Call each of the functions in the hook value, passing each of them
2325 as arguments all the rest of ARGS (all NARGS - 1 elements).
2326 COND specifies a condition to test after each call
2327 to decide whether to stop.
2328 The caller (or its caller, etc) must gcpro all of ARGS,
2329 except that it isn't necessary to gcpro ARGS[0]. */
2332 run_hook_with_args (nargs
, args
, cond
)
2335 enum run_hooks_condition cond
;
2337 Lisp_Object sym
, val
, ret
;
2338 Lisp_Object globals
;
2339 struct gcpro gcpro1
, gcpro2
, gcpro3
;
2341 /* If we are dying or still initializing,
2342 don't do anything--it would probably crash if we tried. */
2343 if (NILP (Vrun_hooks
))
2347 val
= find_symbol_value (sym
);
2348 ret
= (cond
== until_failure
? Qt
: Qnil
);
2350 if (EQ (val
, Qunbound
) || NILP (val
))
2352 else if (!CONSP (val
) || EQ (XCAR (val
), Qlambda
))
2355 return Ffuncall (nargs
, args
);
2360 GCPRO3 (sym
, val
, globals
);
2363 CONSP (val
) && ((cond
== to_completion
)
2364 || (cond
== until_success
? NILP (ret
)
2368 if (EQ (XCAR (val
), Qt
))
2370 /* t indicates this hook has a local binding;
2371 it means to run the global binding too. */
2373 for (globals
= Fdefault_value (sym
);
2374 CONSP (globals
) && ((cond
== to_completion
)
2375 || (cond
== until_success
? NILP (ret
)
2377 globals
= XCDR (globals
))
2379 args
[0] = XCAR (globals
);
2380 /* In a global value, t should not occur. If it does, we
2381 must ignore it to avoid an endless loop. */
2382 if (!EQ (args
[0], Qt
))
2383 ret
= Ffuncall (nargs
, args
);
2388 args
[0] = XCAR (val
);
2389 ret
= Ffuncall (nargs
, args
);
2398 /* Run a hook symbol ARGS[0], but use FUNLIST instead of the actual
2399 present value of that symbol.
2400 Call each element of FUNLIST,
2401 passing each of them the rest of ARGS.
2402 The caller (or its caller, etc) must gcpro all of ARGS,
2403 except that it isn't necessary to gcpro ARGS[0]. */
2406 run_hook_list_with_args (funlist
, nargs
, args
)
2407 Lisp_Object funlist
;
2413 Lisp_Object globals
;
2414 struct gcpro gcpro1
, gcpro2
, gcpro3
;
2418 GCPRO3 (sym
, val
, globals
);
2420 for (val
= funlist
; CONSP (val
); val
= XCDR (val
))
2422 if (EQ (XCAR (val
), Qt
))
2424 /* t indicates this hook has a local binding;
2425 it means to run the global binding too. */
2427 for (globals
= Fdefault_value (sym
);
2429 globals
= XCDR (globals
))
2431 args
[0] = XCAR (globals
);
2432 /* In a global value, t should not occur. If it does, we
2433 must ignore it to avoid an endless loop. */
2434 if (!EQ (args
[0], Qt
))
2435 Ffuncall (nargs
, args
);
2440 args
[0] = XCAR (val
);
2441 Ffuncall (nargs
, args
);
2448 /* Run the hook HOOK, giving each function the two args ARG1 and ARG2. */
2451 run_hook_with_args_2 (hook
, arg1
, arg2
)
2452 Lisp_Object hook
, arg1
, arg2
;
2454 Lisp_Object temp
[3];
2459 Frun_hook_with_args (3, temp
);
2462 /* Apply fn to arg */
2465 Lisp_Object fn
, arg
;
2467 struct gcpro gcpro1
;
2471 RETURN_UNGCPRO (Ffuncall (1, &fn
));
2475 Lisp_Object args
[2];
2479 RETURN_UNGCPRO (Fapply (2, args
));
2481 #else /* not NO_ARG_ARRAY */
2482 RETURN_UNGCPRO (Fapply (2, &fn
));
2483 #endif /* not NO_ARG_ARRAY */
2486 /* Call function fn on no arguments */
2491 struct gcpro gcpro1
;
2494 RETURN_UNGCPRO (Ffuncall (1, &fn
));
2497 /* Call function fn with 1 argument arg1 */
2501 Lisp_Object fn
, arg1
;
2503 struct gcpro gcpro1
;
2505 Lisp_Object args
[2];
2511 RETURN_UNGCPRO (Ffuncall (2, args
));
2512 #else /* not NO_ARG_ARRAY */
2515 RETURN_UNGCPRO (Ffuncall (2, &fn
));
2516 #endif /* not NO_ARG_ARRAY */
2519 /* Call function fn with 2 arguments arg1, arg2 */
2522 call2 (fn
, arg1
, arg2
)
2523 Lisp_Object fn
, arg1
, arg2
;
2525 struct gcpro gcpro1
;
2527 Lisp_Object args
[3];
2533 RETURN_UNGCPRO (Ffuncall (3, args
));
2534 #else /* not NO_ARG_ARRAY */
2537 RETURN_UNGCPRO (Ffuncall (3, &fn
));
2538 #endif /* not NO_ARG_ARRAY */
2541 /* Call function fn with 3 arguments arg1, arg2, arg3 */
2544 call3 (fn
, arg1
, arg2
, arg3
)
2545 Lisp_Object fn
, arg1
, arg2
, arg3
;
2547 struct gcpro gcpro1
;
2549 Lisp_Object args
[4];
2556 RETURN_UNGCPRO (Ffuncall (4, args
));
2557 #else /* not NO_ARG_ARRAY */
2560 RETURN_UNGCPRO (Ffuncall (4, &fn
));
2561 #endif /* not NO_ARG_ARRAY */
2564 /* Call function fn with 4 arguments arg1, arg2, arg3, arg4 */
2567 call4 (fn
, arg1
, arg2
, arg3
, arg4
)
2568 Lisp_Object fn
, arg1
, arg2
, arg3
, arg4
;
2570 struct gcpro gcpro1
;
2572 Lisp_Object args
[5];
2580 RETURN_UNGCPRO (Ffuncall (5, args
));
2581 #else /* not NO_ARG_ARRAY */
2584 RETURN_UNGCPRO (Ffuncall (5, &fn
));
2585 #endif /* not NO_ARG_ARRAY */
2588 /* Call function fn with 5 arguments arg1, arg2, arg3, arg4, arg5 */
2591 call5 (fn
, arg1
, arg2
, arg3
, arg4
, arg5
)
2592 Lisp_Object fn
, arg1
, arg2
, arg3
, arg4
, arg5
;
2594 struct gcpro gcpro1
;
2596 Lisp_Object args
[6];
2605 RETURN_UNGCPRO (Ffuncall (6, args
));
2606 #else /* not NO_ARG_ARRAY */
2609 RETURN_UNGCPRO (Ffuncall (6, &fn
));
2610 #endif /* not NO_ARG_ARRAY */
2613 /* Call function fn with 6 arguments arg1, arg2, arg3, arg4, arg5, arg6 */
2616 call6 (fn
, arg1
, arg2
, arg3
, arg4
, arg5
, arg6
)
2617 Lisp_Object fn
, arg1
, arg2
, arg3
, arg4
, arg5
, arg6
;
2619 struct gcpro gcpro1
;
2621 Lisp_Object args
[7];
2631 RETURN_UNGCPRO (Ffuncall (7, args
));
2632 #else /* not NO_ARG_ARRAY */
2635 RETURN_UNGCPRO (Ffuncall (7, &fn
));
2636 #endif /* not NO_ARG_ARRAY */
2639 DEFUN ("funcall", Ffuncall
, Sfuncall
, 1, MANY
, 0,
2640 doc
: /* Call first argument as a function, passing remaining arguments to it.
2641 Return the value that function returns.
2642 Thus, (funcall 'cons 'x 'y) returns (x . y).
2643 usage: (funcall FUNCTION &rest ARGUMENTS) */)
2650 int numargs
= nargs
- 1;
2651 Lisp_Object lisp_numargs
;
2653 struct backtrace backtrace
;
2654 register Lisp_Object
*internal_args
;
2658 if (consing_since_gc
> gc_cons_threshold
)
2659 Fgarbage_collect ();
2661 if (++lisp_eval_depth
> max_lisp_eval_depth
)
2663 if (max_lisp_eval_depth
< 100)
2664 max_lisp_eval_depth
= 100;
2665 if (lisp_eval_depth
> max_lisp_eval_depth
)
2666 error ("Lisp nesting exceeds max-lisp-eval-depth");
2669 backtrace
.next
= backtrace_list
;
2670 backtrace_list
= &backtrace
;
2671 backtrace
.function
= &args
[0];
2672 backtrace
.args
= &args
[1];
2673 backtrace
.nargs
= nargs
- 1;
2674 backtrace
.evalargs
= 0;
2675 backtrace
.debug_on_exit
= 0;
2677 if (debug_on_next_call
)
2678 do_debug_on_call (Qlambda
);
2684 fun
= Findirect_function (fun
);
2688 if (numargs
< XSUBR (fun
)->min_args
2689 || (XSUBR (fun
)->max_args
>= 0 && XSUBR (fun
)->max_args
< numargs
))
2691 XSETFASTINT (lisp_numargs
, numargs
);
2692 return Fsignal (Qwrong_number_of_arguments
, Fcons (fun
, Fcons (lisp_numargs
, Qnil
)));
2695 if (XSUBR (fun
)->max_args
== UNEVALLED
)
2696 return Fsignal (Qinvalid_function
, Fcons (fun
, Qnil
));
2698 if (XSUBR (fun
)->max_args
== MANY
)
2700 val
= (*XSUBR (fun
)->function
) (numargs
, args
+ 1);
2704 if (XSUBR (fun
)->max_args
> numargs
)
2706 internal_args
= (Lisp_Object
*) alloca (XSUBR (fun
)->max_args
* sizeof (Lisp_Object
));
2707 bcopy (args
+ 1, internal_args
, numargs
* sizeof (Lisp_Object
));
2708 for (i
= numargs
; i
< XSUBR (fun
)->max_args
; i
++)
2709 internal_args
[i
] = Qnil
;
2712 internal_args
= args
+ 1;
2713 switch (XSUBR (fun
)->max_args
)
2716 val
= (*XSUBR (fun
)->function
) ();
2719 val
= (*XSUBR (fun
)->function
) (internal_args
[0]);
2722 val
= (*XSUBR (fun
)->function
) (internal_args
[0],
2726 val
= (*XSUBR (fun
)->function
) (internal_args
[0], internal_args
[1],
2730 val
= (*XSUBR (fun
)->function
) (internal_args
[0], internal_args
[1],
2735 val
= (*XSUBR (fun
)->function
) (internal_args
[0], internal_args
[1],
2736 internal_args
[2], internal_args
[3],
2740 val
= (*XSUBR (fun
)->function
) (internal_args
[0], internal_args
[1],
2741 internal_args
[2], internal_args
[3],
2742 internal_args
[4], internal_args
[5]);
2745 val
= (*XSUBR (fun
)->function
) (internal_args
[0], internal_args
[1],
2746 internal_args
[2], internal_args
[3],
2747 internal_args
[4], internal_args
[5],
2752 val
= (*XSUBR (fun
)->function
) (internal_args
[0], internal_args
[1],
2753 internal_args
[2], internal_args
[3],
2754 internal_args
[4], internal_args
[5],
2755 internal_args
[6], internal_args
[7]);
2760 /* If a subr takes more than 8 arguments without using MANY
2761 or UNEVALLED, we need to extend this function to support it.
2762 Until this is done, there is no way to call the function. */
2766 if (COMPILEDP (fun
))
2767 val
= funcall_lambda (fun
, numargs
, args
+ 1);
2771 return Fsignal (Qinvalid_function
, Fcons (fun
, Qnil
));
2772 funcar
= Fcar (fun
);
2773 if (!SYMBOLP (funcar
))
2774 return Fsignal (Qinvalid_function
, Fcons (fun
, Qnil
));
2775 if (EQ (funcar
, Qlambda
))
2776 val
= funcall_lambda (fun
, numargs
, args
+ 1);
2777 else if (EQ (funcar
, Qautoload
))
2779 do_autoload (fun
, args
[0]);
2783 return Fsignal (Qinvalid_function
, Fcons (fun
, Qnil
));
2787 if (backtrace
.debug_on_exit
)
2788 val
= call_debugger (Fcons (Qexit
, Fcons (val
, Qnil
)));
2789 backtrace_list
= backtrace
.next
;
2794 apply_lambda (fun
, args
, eval_flag
)
2795 Lisp_Object fun
, args
;
2798 Lisp_Object args_left
;
2799 Lisp_Object numargs
;
2800 register Lisp_Object
*arg_vector
;
2801 struct gcpro gcpro1
, gcpro2
, gcpro3
;
2803 register Lisp_Object tem
;
2805 numargs
= Flength (args
);
2806 arg_vector
= (Lisp_Object
*) alloca (XINT (numargs
) * sizeof (Lisp_Object
));
2809 GCPRO3 (*arg_vector
, args_left
, fun
);
2812 for (i
= 0; i
< XINT (numargs
);)
2814 tem
= Fcar (args_left
), args_left
= Fcdr (args_left
);
2815 if (eval_flag
) tem
= Feval (tem
);
2816 arg_vector
[i
++] = tem
;
2824 backtrace_list
->args
= arg_vector
;
2825 backtrace_list
->nargs
= i
;
2827 backtrace_list
->evalargs
= 0;
2828 tem
= funcall_lambda (fun
, XINT (numargs
), arg_vector
);
2830 /* Do the debug-on-exit now, while arg_vector still exists. */
2831 if (backtrace_list
->debug_on_exit
)
2832 tem
= call_debugger (Fcons (Qexit
, Fcons (tem
, Qnil
)));
2833 /* Don't do it again when we return to eval. */
2834 backtrace_list
->debug_on_exit
= 0;
2838 /* Apply a Lisp function FUN to the NARGS evaluated arguments in ARG_VECTOR
2839 and return the result of evaluation.
2840 FUN must be either a lambda-expression or a compiled-code object. */
2843 funcall_lambda (fun
, nargs
, arg_vector
)
2846 register Lisp_Object
*arg_vector
;
2848 Lisp_Object val
, syms_left
, next
;
2849 int count
= specpdl_ptr
- specpdl
;
2850 int i
, optional
, rest
;
2854 syms_left
= XCDR (fun
);
2855 if (CONSP (syms_left
))
2856 syms_left
= XCAR (syms_left
);
2858 return Fsignal (Qinvalid_function
, Fcons (fun
, Qnil
));
2860 else if (COMPILEDP (fun
))
2861 syms_left
= AREF (fun
, COMPILED_ARGLIST
);
2865 i
= optional
= rest
= 0;
2866 for (; CONSP (syms_left
); syms_left
= XCDR (syms_left
))
2870 next
= XCAR (syms_left
);
2871 while (!SYMBOLP (next
))
2872 next
= Fsignal (Qinvalid_function
, Fcons (fun
, Qnil
));
2874 if (EQ (next
, Qand_rest
))
2876 else if (EQ (next
, Qand_optional
))
2880 specbind (next
, Flist (nargs
- i
, &arg_vector
[i
]));
2884 specbind (next
, arg_vector
[i
++]);
2886 return Fsignal (Qwrong_number_of_arguments
,
2887 Fcons (fun
, Fcons (make_number (nargs
), Qnil
)));
2889 specbind (next
, Qnil
);
2892 if (!NILP (syms_left
))
2893 return Fsignal (Qinvalid_function
, Fcons (fun
, Qnil
));
2895 return Fsignal (Qwrong_number_of_arguments
,
2896 Fcons (fun
, Fcons (make_number (nargs
), Qnil
)));
2899 val
= Fprogn (XCDR (XCDR (fun
)));
2902 /* If we have not actually read the bytecode string
2903 and constants vector yet, fetch them from the file. */
2904 if (CONSP (AREF (fun
, COMPILED_BYTECODE
)))
2905 Ffetch_bytecode (fun
);
2906 val
= Fbyte_code (AREF (fun
, COMPILED_BYTECODE
),
2907 AREF (fun
, COMPILED_CONSTANTS
),
2908 AREF (fun
, COMPILED_STACK_DEPTH
));
2911 return unbind_to (count
, val
);
2914 DEFUN ("fetch-bytecode", Ffetch_bytecode
, Sfetch_bytecode
,
2916 doc
: /* If byte-compiled OBJECT is lazy-loaded, fetch it now. */)
2922 if (COMPILEDP (object
) && CONSP (AREF (object
, COMPILED_BYTECODE
)))
2924 tem
= read_doc_string (AREF (object
, COMPILED_BYTECODE
));
2927 tem
= AREF (object
, COMPILED_BYTECODE
);
2928 if (CONSP (tem
) && STRINGP (XCAR (tem
)))
2929 error ("Invalid byte code in %s", XSTRING (XCAR (tem
))->data
);
2931 error ("Invalid byte code");
2933 AREF (object
, COMPILED_BYTECODE
) = XCAR (tem
);
2934 AREF (object
, COMPILED_CONSTANTS
) = XCDR (tem
);
2942 register int count
= specpdl_ptr
- specpdl
;
2943 if (specpdl_size
>= max_specpdl_size
)
2945 if (max_specpdl_size
< 400)
2946 max_specpdl_size
= 400;
2947 if (specpdl_size
>= max_specpdl_size
)
2949 if (!NILP (Vdebug_on_error
))
2950 /* Leave room for some specpdl in the debugger. */
2951 max_specpdl_size
= specpdl_size
+ 100;
2953 Fcons (build_string ("Variable binding depth exceeds max-specpdl-size"), Qnil
));
2957 if (specpdl_size
> max_specpdl_size
)
2958 specpdl_size
= max_specpdl_size
;
2959 specpdl
= (struct specbinding
*) xrealloc (specpdl
, specpdl_size
* sizeof (struct specbinding
));
2960 specpdl_ptr
= specpdl
+ count
;
2964 specbind (symbol
, value
)
2965 Lisp_Object symbol
, value
;
2968 Lisp_Object valcontents
;
2970 CHECK_SYMBOL (symbol
);
2971 if (specpdl_ptr
== specpdl
+ specpdl_size
)
2974 /* The most common case is that of a non-constant symbol with a
2975 trivial value. Make that as fast as we can. */
2976 valcontents
= SYMBOL_VALUE (symbol
);
2977 if (!MISCP (valcontents
) && !SYMBOL_CONSTANT_P (symbol
))
2979 specpdl_ptr
->symbol
= symbol
;
2980 specpdl_ptr
->old_value
= valcontents
;
2981 specpdl_ptr
->func
= NULL
;
2983 SET_SYMBOL_VALUE (symbol
, value
);
2987 Lisp_Object valcontents
;
2989 ovalue
= find_symbol_value (symbol
);
2990 specpdl_ptr
->func
= 0;
2991 specpdl_ptr
->old_value
= ovalue
;
2993 valcontents
= XSYMBOL (symbol
)->value
;
2995 if (BUFFER_LOCAL_VALUEP (valcontents
)
2996 || SOME_BUFFER_LOCAL_VALUEP (valcontents
)
2997 || BUFFER_OBJFWDP (valcontents
))
2999 Lisp_Object where
, current_buffer
;
3001 current_buffer
= Fcurrent_buffer ();
3003 /* For a local variable, record both the symbol and which
3004 buffer's or frame's value we are saving. */
3005 if (!NILP (Flocal_variable_p (symbol
, Qnil
)))
3006 where
= current_buffer
;
3007 else if (!BUFFER_OBJFWDP (valcontents
)
3008 && XBUFFER_LOCAL_VALUE (valcontents
)->found_for_frame
)
3009 where
= XBUFFER_LOCAL_VALUE (valcontents
)->frame
;
3013 /* We're not using the `unused' slot in the specbinding
3014 structure because this would mean we have to do more
3015 work for simple variables. */
3016 specpdl_ptr
->symbol
= Fcons (symbol
, Fcons (where
, current_buffer
));
3018 /* If SYMBOL is a per-buffer variable which doesn't have a
3019 buffer-local value here, make the `let' change the global
3020 value by changing the value of SYMBOL in all buffers not
3021 having their own value. This is consistent with what
3022 happens with other buffer-local variables. */
3024 && BUFFER_OBJFWDP (valcontents
))
3027 Fset_default (symbol
, value
);
3032 specpdl_ptr
->symbol
= symbol
;
3035 if (BUFFER_OBJFWDP (ovalue
) || KBOARD_OBJFWDP (ovalue
))
3036 store_symval_forwarding (symbol
, ovalue
, value
, NULL
);
3038 set_internal (symbol
, value
, 0, 1);
3043 record_unwind_protect (function
, arg
)
3044 Lisp_Object (*function
) P_ ((Lisp_Object
));
3047 if (specpdl_ptr
== specpdl
+ specpdl_size
)
3049 specpdl_ptr
->func
= function
;
3050 specpdl_ptr
->symbol
= Qnil
;
3051 specpdl_ptr
->old_value
= arg
;
3056 unbind_to (count
, value
)
3060 int quitf
= !NILP (Vquit_flag
);
3061 struct gcpro gcpro1
;
3066 while (specpdl_ptr
!= specpdl
+ count
)
3070 if (specpdl_ptr
->func
!= 0)
3071 (*specpdl_ptr
->func
) (specpdl_ptr
->old_value
);
3072 /* Note that a "binding" of nil is really an unwind protect,
3073 so in that case the "old value" is a list of forms to evaluate. */
3074 else if (NILP (specpdl_ptr
->symbol
))
3075 Fprogn (specpdl_ptr
->old_value
);
3076 /* If the symbol is a list, it is really (SYMBOL WHERE
3077 . CURRENT-BUFFER) where WHERE is either nil, a buffer, or a
3078 frame. If WHERE is a buffer or frame, this indicates we
3079 bound a variable that had a buffer-local or frame-local
3080 binding. WHERE nil means that the variable had the default
3081 value when it was bound. CURRENT-BUFFER is the buffer that
3082 was current when the variable was bound. */
3083 else if (CONSP (specpdl_ptr
->symbol
))
3085 Lisp_Object symbol
, where
;
3087 symbol
= XCAR (specpdl_ptr
->symbol
);
3088 where
= XCAR (XCDR (specpdl_ptr
->symbol
));
3091 Fset_default (symbol
, specpdl_ptr
->old_value
);
3092 else if (BUFFERP (where
))
3093 set_internal (symbol
, specpdl_ptr
->old_value
, XBUFFER (where
), 1);
3095 set_internal (symbol
, specpdl_ptr
->old_value
, NULL
, 1);
3099 /* If variable has a trivial value (no forwarding), we can
3100 just set it. No need to check for constant symbols here,
3101 since that was already done by specbind. */
3102 if (!MISCP (SYMBOL_VALUE (specpdl_ptr
->symbol
)))
3103 SET_SYMBOL_VALUE (specpdl_ptr
->symbol
, specpdl_ptr
->old_value
);
3105 set_internal (specpdl_ptr
->symbol
, specpdl_ptr
->old_value
, 0, 1);
3109 if (NILP (Vquit_flag
) && quitf
)
3116 DEFUN ("backtrace-debug", Fbacktrace_debug
, Sbacktrace_debug
, 2, 2, 0,
3117 doc
: /* Set the debug-on-exit flag of eval frame LEVEL levels down to FLAG.
3118 The debugger is entered when that frame exits, if the flag is non-nil. */)
3120 Lisp_Object level
, flag
;
3122 register struct backtrace
*backlist
= backtrace_list
;
3125 CHECK_NUMBER (level
);
3127 for (i
= 0; backlist
&& i
< XINT (level
); i
++)
3129 backlist
= backlist
->next
;
3133 backlist
->debug_on_exit
= !NILP (flag
);
3138 DEFUN ("backtrace", Fbacktrace
, Sbacktrace
, 0, 0, "",
3139 doc
: /* Print a trace of Lisp function calls currently active.
3140 Output stream used is value of `standard-output'. */)
3143 register struct backtrace
*backlist
= backtrace_list
;
3147 extern Lisp_Object Vprint_level
;
3148 struct gcpro gcpro1
;
3150 XSETFASTINT (Vprint_level
, 3);
3157 write_string (backlist
->debug_on_exit
? "* " : " ", 2);
3158 if (backlist
->nargs
== UNEVALLED
)
3160 Fprin1 (Fcons (*backlist
->function
, *backlist
->args
), Qnil
);
3161 write_string ("\n", -1);
3165 tem
= *backlist
->function
;
3166 Fprin1 (tem
, Qnil
); /* This can QUIT */
3167 write_string ("(", -1);
3168 if (backlist
->nargs
== MANY
)
3170 for (tail
= *backlist
->args
, i
= 0;
3172 tail
= Fcdr (tail
), i
++)
3174 if (i
) write_string (" ", -1);
3175 Fprin1 (Fcar (tail
), Qnil
);
3180 for (i
= 0; i
< backlist
->nargs
; i
++)
3182 if (i
) write_string (" ", -1);
3183 Fprin1 (backlist
->args
[i
], Qnil
);
3186 write_string (")\n", -1);
3188 backlist
= backlist
->next
;
3191 Vprint_level
= Qnil
;
3196 DEFUN ("backtrace-frame", Fbacktrace_frame
, Sbacktrace_frame
, 1, 1, NULL
,
3197 doc
: /* Return the function and arguments NFRAMES up from current execution point.
3198 If that frame has not evaluated the arguments yet (or is a special form),
3199 the value is (nil FUNCTION ARG-FORMS...).
3200 If that frame has evaluated its arguments and called its function already,
3201 the value is (t FUNCTION ARG-VALUES...).
3202 A &rest arg is represented as the tail of the list ARG-VALUES.
3203 FUNCTION is whatever was supplied as car of evaluated list,
3204 or a lambda expression for macro calls.
3205 If NFRAMES is more than the number of frames, the value is nil. */)
3207 Lisp_Object nframes
;
3209 register struct backtrace
*backlist
= backtrace_list
;
3213 CHECK_NATNUM (nframes
);
3215 /* Find the frame requested. */
3216 for (i
= 0; backlist
&& i
< XFASTINT (nframes
); i
++)
3217 backlist
= backlist
->next
;
3221 if (backlist
->nargs
== UNEVALLED
)
3222 return Fcons (Qnil
, Fcons (*backlist
->function
, *backlist
->args
));
3225 if (backlist
->nargs
== MANY
)
3226 tem
= *backlist
->args
;
3228 tem
= Flist (backlist
->nargs
, backlist
->args
);
3230 return Fcons (Qt
, Fcons (*backlist
->function
, tem
));
3238 DEFVAR_INT ("max-specpdl-size", &max_specpdl_size
,
3239 doc
: /* *Limit on number of Lisp variable bindings & unwind-protects.
3240 If Lisp code tries to make more than this many at once,
3241 an error is signaled. */);
3243 DEFVAR_INT ("max-lisp-eval-depth", &max_lisp_eval_depth
,
3244 doc
: /* *Limit on depth in `eval', `apply' and `funcall' before error.
3245 This limit is to catch infinite recursions for you before they cause
3246 actual stack overflow in C, which would be fatal for Emacs.
3247 You can safely make it considerably larger than its default value,
3248 if that proves inconveniently small. */);
3250 DEFVAR_LISP ("quit-flag", &Vquit_flag
,
3251 doc
: /* Non-nil causes `eval' to abort, unless `inhibit-quit' is non-nil.
3252 Typing C-g sets `quit-flag' non-nil, regardless of `inhibit-quit'. */);
3255 DEFVAR_LISP ("inhibit-quit", &Vinhibit_quit
,
3256 doc
: /* Non-nil inhibits C-g quitting from happening immediately.
3257 Note that `quit-flag' will still be set by typing C-g,
3258 so a quit will be signaled as soon as `inhibit-quit' is nil.
3259 To prevent this happening, set `quit-flag' to nil
3260 before making `inhibit-quit' nil. */);
3261 Vinhibit_quit
= Qnil
;
3263 Qinhibit_quit
= intern ("inhibit-quit");
3264 staticpro (&Qinhibit_quit
);
3266 Qautoload
= intern ("autoload");
3267 staticpro (&Qautoload
);
3269 Qdebug_on_error
= intern ("debug-on-error");
3270 staticpro (&Qdebug_on_error
);
3272 Qmacro
= intern ("macro");
3273 staticpro (&Qmacro
);
3275 Qdeclare
= intern ("declare");
3276 staticpro (&Qdeclare
);
3278 /* Note that the process handling also uses Qexit, but we don't want
3279 to staticpro it twice, so we just do it here. */
3280 Qexit
= intern ("exit");
3283 Qinteractive
= intern ("interactive");
3284 staticpro (&Qinteractive
);
3286 Qcommandp
= intern ("commandp");
3287 staticpro (&Qcommandp
);
3289 Qdefun
= intern ("defun");
3290 staticpro (&Qdefun
);
3292 Qand_rest
= intern ("&rest");
3293 staticpro (&Qand_rest
);
3295 Qand_optional
= intern ("&optional");
3296 staticpro (&Qand_optional
);
3298 DEFVAR_LISP ("stack-trace-on-error", &Vstack_trace_on_error
,
3299 doc
: /* *Non-nil means errors display a backtrace buffer.
3300 More precisely, this happens for any error that is handled
3301 by the editor command loop.
3302 If the value is a list, an error only means to display a backtrace
3303 if one of its condition symbols appears in the list. */);
3304 Vstack_trace_on_error
= Qnil
;
3306 DEFVAR_LISP ("debug-on-error", &Vdebug_on_error
,
3307 doc
: /* *Non-nil means enter debugger if an error is signaled.
3308 Does not apply to errors handled by `condition-case' or those
3309 matched by `debug-ignored-errors'.
3310 If the value is a list, an error only means to enter the debugger
3311 if one of its condition symbols appears in the list.
3312 When you evaluate an expression interactively, this variable
3313 is temporarily non-nil if `eval-expression-debug-on-error' is non-nil.
3314 See also variable `debug-on-quit'. */);
3315 Vdebug_on_error
= Qnil
;
3317 DEFVAR_LISP ("debug-ignored-errors", &Vdebug_ignored_errors
,
3318 doc
: /* *List of errors for which the debugger should not be called.
3319 Each element may be a condition-name or a regexp that matches error messages.
3320 If any element applies to a given error, that error skips the debugger
3321 and just returns to top level.
3322 This overrides the variable `debug-on-error'.
3323 It does not apply to errors handled by `condition-case'. */);
3324 Vdebug_ignored_errors
= Qnil
;
3326 DEFVAR_BOOL ("debug-on-quit", &debug_on_quit
,
3327 doc
: /* *Non-nil means enter debugger if quit is signaled (C-g, for example).
3328 Does not apply if quit is handled by a `condition-case'.
3329 When you evaluate an expression interactively, this variable
3330 is temporarily non-nil if `eval-expression-debug-on-quit' is non-nil. */);
3333 DEFVAR_BOOL ("debug-on-next-call", &debug_on_next_call
,
3334 doc
: /* Non-nil means enter debugger before next `eval', `apply' or `funcall'. */);
3336 DEFVAR_BOOL ("debugger-may-continue", &debugger_may_continue
,
3337 doc
: /* Non-nil means debugger may continue execution.
3338 This is nil when the debugger is called under circumstances where it
3339 might not be safe to continue. */);
3340 debugger_may_continue
= 1;
3342 DEFVAR_LISP ("debugger", &Vdebugger
,
3343 doc
: /* Function to call to invoke debugger.
3344 If due to frame exit, args are `exit' and the value being returned;
3345 this function's value will be returned instead of that.
3346 If due to error, args are `error' and a list of the args to `signal'.
3347 If due to `apply' or `funcall' entry, one arg, `lambda'.
3348 If due to `eval' entry, one arg, t. */);
3351 DEFVAR_LISP ("signal-hook-function", &Vsignal_hook_function
,
3352 doc
: /* If non-nil, this is a function for `signal' to call.
3353 It receives the same arguments that `signal' was given.
3354 The Edebug package uses this to regain control. */);
3355 Vsignal_hook_function
= Qnil
;
3357 DEFVAR_LISP ("debug-on-signal", &Vdebug_on_signal
,
3358 doc
: /* *Non-nil means call the debugger regardless of condition handlers.
3359 Note that `debug-on-error', `debug-on-quit' and friends
3360 still determine whether to handle the particular condition. */);
3361 Vdebug_on_signal
= Qnil
;
3363 DEFVAR_LISP ("macro-declaration-function", &Vmacro_declaration_function
,
3364 doc
: /* Function to process declarations in a macro definition.
3365 The function will be called with two args MACRO and DECL.
3366 MACRO is the name of the macro being defined.
3367 DECL is a list `(declare ...)' containing the declarations.
3368 The value the function returns is not used. */);
3369 Vmacro_declaration_function
= Qnil
;
3371 Vrun_hooks
= intern ("run-hooks");
3372 staticpro (&Vrun_hooks
);
3374 staticpro (&Vautoload_queue
);
3375 Vautoload_queue
= Qnil
;
3376 staticpro (&Vsignaling_function
);
3377 Vsignaling_function
= Qnil
;
3388 defsubr (&Sfunction
);
3390 defsubr (&Sdefmacro
);
3392 defsubr (&Sdefvaralias
);
3393 defsubr (&Sdefconst
);
3394 defsubr (&Suser_variable_p
);
3398 defsubr (&Smacroexpand
);
3401 defsubr (&Sunwind_protect
);
3402 defsubr (&Scondition_case
);
3404 defsubr (&Sinteractive_p
);
3405 defsubr (&Scommandp
);
3406 defsubr (&Sautoload
);
3409 defsubr (&Sfuncall
);
3410 defsubr (&Srun_hooks
);
3411 defsubr (&Srun_hook_with_args
);
3412 defsubr (&Srun_hook_with_args_until_success
);
3413 defsubr (&Srun_hook_with_args_until_failure
);
3414 defsubr (&Sfetch_bytecode
);
3415 defsubr (&Sbacktrace_debug
);
3416 defsubr (&Sbacktrace
);
3417 defsubr (&Sbacktrace_frame
);