1 /* Evaluator for GNU Emacs Lisp interpreter.
2 Copyright (C) 1985-1987, 1993-1995, 1999-2011 Free Software Foundation, Inc.
4 This file is part of GNU Emacs.
6 GNU Emacs is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
11 GNU Emacs is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
24 #include "blockinput.h"
27 #include "dispextern.h"
28 #include "frame.h" /* For XFRAME. */
35 # define SIZE_MAX ((size_t) -1)
38 /* This definition is duplicated in alloc.c and keyboard.c. */
39 /* Putting it in lisp.h makes cc bomb out! */
43 struct backtrace
*next
;
44 Lisp_Object
*function
;
45 Lisp_Object
*args
; /* Points to vector of args. */
46 #define NARGS_BITS (BITS_PER_INT - 2)
47 /* Let's not use size_t because we want to allow negative values (for
48 UNEVALLED). Also let's steal 2 bits so we save a word (or more for
49 alignment). In any case I doubt Emacs would survive a function call with
50 more than 500M arguments. */
51 int nargs
: NARGS_BITS
; /* Length of vector.
52 If nargs is UNEVALLED, args points
53 to slot holding list of unevalled args. */
55 /* Nonzero means call value of debugger when done with this operation. */
56 char debug_on_exit
: 1;
59 static struct backtrace
*backtrace_list
;
64 struct catchtag
*catchlist
;
66 /* Chain of condition handlers currently in effect.
67 The elements of this chain are contained in the stack frames
68 of Fcondition_case and internal_condition_case.
69 When an error is signaled (by calling Fsignal, below),
70 this chain is searched for an element that applies. */
75 struct handler
*handlerlist
;
78 /* Count levels of GCPRO to detect failure to UNGCPRO. */
82 Lisp_Object Qautoload
, Qmacro
, Qexit
, Qinteractive
, Qcommandp
, Qdefun
;
83 Lisp_Object Qinhibit_quit
;
84 Lisp_Object Qand_rest
;
85 static Lisp_Object Qand_optional
;
86 static Lisp_Object Qdebug_on_error
;
87 static Lisp_Object Qdeclare
;
88 Lisp_Object Qinternal_interpreter_environment
, Qclosure
;
90 static Lisp_Object Qdebug
;
92 /* This holds either the symbol `run-hooks' or nil.
93 It is nil at an early stage of startup, and when Emacs
96 Lisp_Object Vrun_hooks
;
98 /* Non-nil means record all fset's and provide's, to be undone
99 if the file being autoloaded is not fully loaded.
100 They are recorded by being consed onto the front of Vautoload_queue:
101 (FUN . ODEF) for a defun, (0 . OFEATURES) for a provide. */
103 Lisp_Object Vautoload_queue
;
105 /* Current number of specbindings allocated in specpdl. */
107 EMACS_INT specpdl_size
;
109 /* Pointer to beginning of specpdl. */
111 struct specbinding
*specpdl
;
113 /* Pointer to first unused element in specpdl. */
115 struct specbinding
*specpdl_ptr
;
117 /* Depth in Lisp evaluations and function calls. */
119 static EMACS_INT lisp_eval_depth
;
121 /* The value of num_nonmacro_input_events as of the last time we
122 started to enter the debugger. If we decide to enter the debugger
123 again when this is still equal to num_nonmacro_input_events, then we
124 know that the debugger itself has an error, and we should just
125 signal the error instead of entering an infinite loop of debugger
128 static int when_entered_debugger
;
130 /* The function from which the last `signal' was called. Set in
133 Lisp_Object Vsignaling_function
;
135 /* Set to non-zero while processing X events. Checked in Feval to
136 make sure the Lisp interpreter isn't called from a signal handler,
137 which is unsafe because the interpreter isn't reentrant. */
141 static Lisp_Object
funcall_lambda (Lisp_Object
, size_t, Lisp_Object
*);
142 static void unwind_to_catch (struct catchtag
*, Lisp_Object
) NO_RETURN
;
143 static int interactive_p (int);
144 static Lisp_Object
apply_lambda (Lisp_Object fun
, Lisp_Object args
);
145 INFUN (Ffetch_bytecode
, 1);
148 init_eval_once (void)
151 specpdl
= (struct specbinding
*) xmalloc (specpdl_size
* sizeof (struct specbinding
));
152 specpdl_ptr
= specpdl
;
153 /* Don't forget to update docs (lispref node "Local Variables"). */
154 max_specpdl_size
= 1300; /* 1000 is not enough for CEDET's c-by.el. */
155 max_lisp_eval_depth
= 600;
163 specpdl_ptr
= specpdl
;
168 debug_on_next_call
= 0;
173 /* This is less than the initial value of num_nonmacro_input_events. */
174 when_entered_debugger
= -1;
177 /* Unwind-protect function used by call_debugger. */
180 restore_stack_limits (Lisp_Object data
)
182 max_specpdl_size
= XINT (XCAR (data
));
183 max_lisp_eval_depth
= XINT (XCDR (data
));
187 /* Call the Lisp debugger, giving it argument ARG. */
190 call_debugger (Lisp_Object arg
)
192 int debug_while_redisplaying
;
193 int count
= SPECPDL_INDEX ();
195 EMACS_INT old_max
= max_specpdl_size
;
197 /* Temporarily bump up the stack limits,
198 so the debugger won't run out of stack. */
200 max_specpdl_size
+= 1;
201 record_unwind_protect (restore_stack_limits
,
202 Fcons (make_number (old_max
),
203 make_number (max_lisp_eval_depth
)));
204 max_specpdl_size
= old_max
;
206 if (lisp_eval_depth
+ 40 > max_lisp_eval_depth
)
207 max_lisp_eval_depth
= lisp_eval_depth
+ 40;
209 if (SPECPDL_INDEX () + 100 > max_specpdl_size
)
210 max_specpdl_size
= SPECPDL_INDEX () + 100;
212 #ifdef HAVE_WINDOW_SYSTEM
213 if (display_hourglass_p
)
217 debug_on_next_call
= 0;
218 when_entered_debugger
= num_nonmacro_input_events
;
220 /* Resetting redisplaying_p to 0 makes sure that debug output is
221 displayed if the debugger is invoked during redisplay. */
222 debug_while_redisplaying
= redisplaying_p
;
224 specbind (intern ("debugger-may-continue"),
225 debug_while_redisplaying
? Qnil
: Qt
);
226 specbind (Qinhibit_redisplay
, Qnil
);
227 specbind (Qdebug_on_error
, Qnil
);
229 #if 0 /* Binding this prevents execution of Lisp code during
230 redisplay, which necessarily leads to display problems. */
231 specbind (Qinhibit_eval_during_redisplay
, Qt
);
234 val
= apply1 (Vdebugger
, arg
);
236 /* Interrupting redisplay and resuming it later is not safe under
237 all circumstances. So, when the debugger returns, abort the
238 interrupted redisplay by going back to the top-level. */
239 if (debug_while_redisplaying
)
242 return unbind_to (count
, val
);
246 do_debug_on_call (Lisp_Object code
)
248 debug_on_next_call
= 0;
249 backtrace_list
->debug_on_exit
= 1;
250 call_debugger (Fcons (code
, Qnil
));
253 /* NOTE!!! Every function that can call EVAL must protect its args
254 and temporaries from garbage collection while it needs them.
255 The definition of `For' shows what you have to do. */
257 DEFUN ("or", For
, Sor
, 0, UNEVALLED
, 0,
258 doc
: /* Eval args until one of them yields non-nil, then return that value.
259 The remaining args are not evalled at all.
260 If all args return nil, return nil.
261 usage: (or CONDITIONS...) */)
264 register Lisp_Object val
= Qnil
;
271 val
= eval_sub (XCAR (args
));
281 DEFUN ("and", Fand
, Sand
, 0, UNEVALLED
, 0,
282 doc
: /* Eval args until one of them yields nil, then return nil.
283 The remaining args are not evalled at all.
284 If no arg yields nil, return the last arg's value.
285 usage: (and CONDITIONS...) */)
288 register Lisp_Object val
= Qt
;
295 val
= eval_sub (XCAR (args
));
305 DEFUN ("if", Fif
, Sif
, 2, UNEVALLED
, 0,
306 doc
: /* If COND yields non-nil, do THEN, else do ELSE...
307 Returns the value of THEN or the value of the last of the ELSE's.
308 THEN must be one expression, but ELSE... can be zero or more expressions.
309 If COND yields nil, and there are no ELSE's, the value is nil.
310 usage: (if COND THEN ELSE...) */)
313 register Lisp_Object cond
;
317 cond
= eval_sub (Fcar (args
));
321 return eval_sub (Fcar (Fcdr (args
)));
322 return Fprogn (Fcdr (Fcdr (args
)));
325 DEFUN ("cond", Fcond
, Scond
, 0, UNEVALLED
, 0,
326 doc
: /* Try each clause until one succeeds.
327 Each clause looks like (CONDITION BODY...). CONDITION is evaluated
328 and, if the value is non-nil, this clause succeeds:
329 then the expressions in BODY are evaluated and the last one's
330 value is the value of the cond-form.
331 If no clause succeeds, cond returns nil.
332 If a clause has one element, as in (CONDITION),
333 CONDITION's value if non-nil is returned from the cond-form.
334 usage: (cond CLAUSES...) */)
337 register Lisp_Object clause
, val
;
344 clause
= Fcar (args
);
345 val
= eval_sub (Fcar (clause
));
348 if (!EQ (XCDR (clause
), Qnil
))
349 val
= Fprogn (XCDR (clause
));
359 DEFUN ("progn", Fprogn
, Sprogn
, 0, UNEVALLED
, 0,
360 doc
: /* Eval BODY forms sequentially and return value of last one.
361 usage: (progn BODY...) */)
364 register Lisp_Object val
= Qnil
;
371 val
= eval_sub (XCAR (args
));
379 DEFUN ("prog1", Fprog1
, Sprog1
, 1, UNEVALLED
, 0,
380 doc
: /* Eval FIRST and BODY sequentially; return value from FIRST.
381 The value of FIRST is saved during the evaluation of the remaining args,
382 whose values are discarded.
383 usage: (prog1 FIRST BODY...) */)
387 register Lisp_Object args_left
;
388 struct gcpro gcpro1
, gcpro2
;
389 register int argnum
= 0;
400 Lisp_Object tem
= eval_sub (XCAR (args_left
));
403 args_left
= XCDR (args_left
);
405 while (CONSP (args_left
));
411 DEFUN ("prog2", Fprog2
, Sprog2
, 2, UNEVALLED
, 0,
412 doc
: /* Eval FORM1, FORM2 and BODY sequentially; return value from FORM2.
413 The value of FORM2 is saved during the evaluation of the
414 remaining args, whose values are discarded.
415 usage: (prog2 FORM1 FORM2 BODY...) */)
419 register Lisp_Object args_left
;
420 struct gcpro gcpro1
, gcpro2
;
421 register int argnum
= -1;
434 Lisp_Object tem
= eval_sub (XCAR (args_left
));
437 args_left
= XCDR (args_left
);
439 while (CONSP (args_left
));
445 DEFUN ("setq", Fsetq
, Ssetq
, 0, UNEVALLED
, 0,
446 doc
: /* Set each SYM to the value of its VAL.
447 The symbols SYM are variables; they are literal (not evaluated).
448 The values VAL are expressions; they are evaluated.
449 Thus, (setq x (1+ y)) sets `x' to the value of `(1+ y)'.
450 The second VAL is not computed until after the first SYM is set, and so on;
451 each VAL can use the new value of variables set earlier in the `setq'.
452 The return value of the `setq' form is the value of the last VAL.
453 usage: (setq [SYM VAL]...) */)
456 register Lisp_Object args_left
;
457 register Lisp_Object val
, sym
, lex_binding
;
468 val
= eval_sub (Fcar (Fcdr (args_left
)));
469 sym
= Fcar (args_left
);
471 /* Like for eval_sub, we do not check declared_special here since
472 it's been done when let-binding. */
473 if (!NILP (Vinternal_interpreter_environment
) /* Mere optimization! */
475 && !NILP (lex_binding
476 = Fassq (sym
, Vinternal_interpreter_environment
)))
477 XSETCDR (lex_binding
, val
); /* SYM is lexically bound. */
479 Fset (sym
, val
); /* SYM is dynamically bound. */
481 args_left
= Fcdr (Fcdr (args_left
));
483 while (!NILP(args_left
));
489 DEFUN ("quote", Fquote
, Squote
, 1, UNEVALLED
, 0,
490 doc
: /* Return the argument, without evaluating it. `(quote x)' yields `x'.
491 usage: (quote ARG) */)
494 if (!NILP (Fcdr (args
)))
495 xsignal2 (Qwrong_number_of_arguments
, Qquote
, Flength (args
));
499 DEFUN ("function", Ffunction
, Sfunction
, 1, UNEVALLED
, 0,
500 doc
: /* Like `quote', but preferred for objects which are functions.
501 In byte compilation, `function' causes its argument to be compiled.
502 `quote' cannot do that.
503 usage: (function ARG) */)
506 Lisp_Object quoted
= XCAR (args
);
508 if (!NILP (Fcdr (args
)))
509 xsignal2 (Qwrong_number_of_arguments
, Qfunction
, Flength (args
));
511 if (!NILP (Vinternal_interpreter_environment
)
513 && EQ (XCAR (quoted
), Qlambda
))
514 /* This is a lambda expression within a lexical environment;
515 return an interpreted closure instead of a simple lambda. */
516 return Fcons (Qclosure
, Fcons (Vinternal_interpreter_environment
,
519 /* Simply quote the argument. */
524 DEFUN ("interactive-p", Finteractive_p
, Sinteractive_p
, 0, 0, 0,
525 doc
: /* Return t if the containing function was run directly by user input.
526 This means that the function was called with `call-interactively'
527 \(which includes being called as the binding of a key)
528 and input is currently coming from the keyboard (not a keyboard macro),
529 and Emacs is not running in batch mode (`noninteractive' is nil).
531 The only known proper use of `interactive-p' is in deciding whether to
532 display a helpful message, or how to display it. If you're thinking
533 of using it for any other purpose, it is quite likely that you're
534 making a mistake. Think: what do you want to do when the command is
535 called from a keyboard macro?
537 To test whether your function was called with `call-interactively',
538 either (i) add an extra optional argument and give it an `interactive'
539 spec that specifies non-nil unconditionally (such as \"p\"); or (ii)
540 use `called-interactively-p'. */)
543 return interactive_p (1) ? Qt
: Qnil
;
547 DEFUN ("called-interactively-p", Fcalled_interactively_p
, Scalled_interactively_p
, 0, 1, 0,
548 doc
: /* Return t if the containing function was called by `call-interactively'.
549 If KIND is `interactive', then only return t if the call was made
550 interactively by the user, i.e. not in `noninteractive' mode nor
551 when `executing-kbd-macro'.
552 If KIND is `any', on the other hand, it will return t for any kind of
553 interactive call, including being called as the binding of a key, or
554 from a keyboard macro, or in `noninteractive' mode.
556 The only known proper use of `interactive' for KIND is in deciding
557 whether to display a helpful message, or how to display it. If you're
558 thinking of using it for any other purpose, it is quite likely that
559 you're making a mistake. Think: what do you want to do when the
560 command is called from a keyboard macro?
562 This function is meant for implementing advice and other
563 function-modifying features. Instead of using this, it is sometimes
564 cleaner to give your function an extra optional argument whose
565 `interactive' spec specifies non-nil unconditionally (\"p\" is a good
566 way to do this), or via (not (or executing-kbd-macro noninteractive)). */)
569 return ((INTERACTIVE
|| !EQ (kind
, intern ("interactive")))
570 && interactive_p (1)) ? Qt
: Qnil
;
574 /* Return 1 if function in which this appears was called using
577 EXCLUDE_SUBRS_P non-zero means always return 0 if the function
578 called is a built-in. */
581 interactive_p (int exclude_subrs_p
)
583 struct backtrace
*btp
;
586 btp
= backtrace_list
;
588 /* If this isn't a byte-compiled function, there may be a frame at
589 the top for Finteractive_p. If so, skip it. */
590 fun
= Findirect_function (*btp
->function
, Qnil
);
591 if (SUBRP (fun
) && (XSUBR (fun
) == &Sinteractive_p
592 || XSUBR (fun
) == &Scalled_interactively_p
))
595 /* If we're running an Emacs 18-style byte-compiled function, there
596 may be a frame for Fbytecode at the top level. In any version of
597 Emacs there can be Fbytecode frames for subexpressions evaluated
598 inside catch and condition-case. Skip past them.
600 If this isn't a byte-compiled function, then we may now be
601 looking at several frames for special forms. Skip past them. */
603 && (EQ (*btp
->function
, Qbytecode
)
604 || btp
->nargs
== UNEVALLED
))
607 /* `btp' now points at the frame of the innermost function that isn't
608 a special form, ignoring frames for Finteractive_p and/or
609 Fbytecode at the top. If this frame is for a built-in function
610 (such as load or eval-region) return nil. */
611 fun
= Findirect_function (*btp
->function
, Qnil
);
612 if (exclude_subrs_p
&& SUBRP (fun
))
615 /* `btp' points to the frame of a Lisp function that called interactive-p.
616 Return t if that function was called interactively. */
617 if (btp
&& btp
->next
&& EQ (*btp
->next
->function
, Qcall_interactively
))
623 DEFUN ("defun", Fdefun
, Sdefun
, 2, UNEVALLED
, 0,
624 doc
: /* Define NAME as a function.
625 The definition is (lambda ARGLIST [DOCSTRING] BODY...).
626 See also the function `interactive'.
627 usage: (defun NAME ARGLIST [DOCSTRING] BODY...) */)
630 register Lisp_Object fn_name
;
631 register Lisp_Object defn
;
633 fn_name
= Fcar (args
);
634 CHECK_SYMBOL (fn_name
);
635 defn
= Fcons (Qlambda
, Fcdr (args
));
636 if (!NILP (Vinternal_interpreter_environment
)) /* Mere optimization! */
637 defn
= Ffunction (Fcons (defn
, Qnil
));
638 if (!NILP (Vpurify_flag
))
639 defn
= Fpurecopy (defn
);
640 if (CONSP (XSYMBOL (fn_name
)->function
)
641 && EQ (XCAR (XSYMBOL (fn_name
)->function
), Qautoload
))
642 LOADHIST_ATTACH (Fcons (Qt
, fn_name
));
643 Ffset (fn_name
, defn
);
644 LOADHIST_ATTACH (Fcons (Qdefun
, fn_name
));
648 DEFUN ("defmacro", Fdefmacro
, Sdefmacro
, 2, UNEVALLED
, 0,
649 doc
: /* Define NAME as a macro.
650 The actual definition looks like
651 (macro lambda ARGLIST [DOCSTRING] [DECL] BODY...).
652 When the macro is called, as in (NAME ARGS...),
653 the function (lambda ARGLIST BODY...) is applied to
654 the list ARGS... as it appears in the expression,
655 and the result should be a form to be evaluated instead of the original.
657 DECL is a declaration, optional, which can specify how to indent
658 calls to this macro, how Edebug should handle it, and which argument
659 should be treated as documentation. It looks like this:
661 The elements can look like this:
663 Set NAME's `lisp-indent-function' property to INDENT.
666 Set NAME's `edebug-form-spec' property to DEBUG. (This is
667 equivalent to writing a `def-edebug-spec' for the macro.)
670 Set NAME's `doc-string-elt' property to ELT.
672 usage: (defmacro NAME ARGLIST [DOCSTRING] [DECL] BODY...) */)
675 register Lisp_Object fn_name
;
676 register Lisp_Object defn
;
677 Lisp_Object lambda_list
, doc
, tail
;
679 fn_name
= Fcar (args
);
680 CHECK_SYMBOL (fn_name
);
681 lambda_list
= Fcar (Fcdr (args
));
682 tail
= Fcdr (Fcdr (args
));
685 if (STRINGP (Fcar (tail
)))
691 if (CONSP (Fcar (tail
))
692 && EQ (Fcar (Fcar (tail
)), Qdeclare
))
694 if (!NILP (Vmacro_declaration_function
))
698 call2 (Vmacro_declaration_function
, fn_name
, Fcar (tail
));
706 tail
= Fcons (lambda_list
, tail
);
708 tail
= Fcons (lambda_list
, Fcons (doc
, tail
));
710 defn
= Fcons (Qlambda
, tail
);
711 if (!NILP (Vinternal_interpreter_environment
)) /* Mere optimization! */
712 defn
= Ffunction (Fcons (defn
, Qnil
));
713 defn
= Fcons (Qmacro
, defn
);
715 if (!NILP (Vpurify_flag
))
716 defn
= Fpurecopy (defn
);
717 if (CONSP (XSYMBOL (fn_name
)->function
)
718 && EQ (XCAR (XSYMBOL (fn_name
)->function
), Qautoload
))
719 LOADHIST_ATTACH (Fcons (Qt
, fn_name
));
720 Ffset (fn_name
, defn
);
721 LOADHIST_ATTACH (Fcons (Qdefun
, fn_name
));
726 DEFUN ("defvaralias", Fdefvaralias
, Sdefvaralias
, 2, 3, 0,
727 doc
: /* Make NEW-ALIAS a variable alias for symbol BASE-VARIABLE.
728 Aliased variables always have the same value; setting one sets the other.
729 Third arg DOCSTRING, if non-nil, is documentation for NEW-ALIAS. If it is
730 omitted or nil, NEW-ALIAS gets the documentation string of BASE-VARIABLE,
731 or of the variable at the end of the chain of aliases, if BASE-VARIABLE is
732 itself an alias. If NEW-ALIAS is bound, and BASE-VARIABLE is not,
733 then the value of BASE-VARIABLE is set to that of NEW-ALIAS.
734 The return value is BASE-VARIABLE. */)
735 (Lisp_Object new_alias
, Lisp_Object base_variable
, Lisp_Object docstring
)
737 struct Lisp_Symbol
*sym
;
739 CHECK_SYMBOL (new_alias
);
740 CHECK_SYMBOL (base_variable
);
742 sym
= XSYMBOL (new_alias
);
745 /* Not sure why, but why not? */
746 error ("Cannot make a constant an alias");
748 switch (sym
->redirect
)
750 case SYMBOL_FORWARDED
:
751 error ("Cannot make an internal variable an alias");
752 case SYMBOL_LOCALIZED
:
753 error ("Don't know how to make a localized variable an alias");
756 /* http://lists.gnu.org/archive/html/emacs-devel/2008-04/msg00834.html
757 If n_a is bound, but b_v is not, set the value of b_v to n_a,
758 so that old-code that affects n_a before the aliasing is setup
760 if (NILP (Fboundp (base_variable
)))
761 set_internal (base_variable
, find_symbol_value (new_alias
), Qnil
, 1);
764 struct specbinding
*p
;
766 for (p
= specpdl_ptr
- 1; p
>= specpdl
; p
--)
769 CONSP (p
->symbol
) ? XCAR (p
->symbol
) : p
->symbol
)))
770 error ("Don't know how to make a let-bound variable an alias");
773 sym
->declared_special
= 1;
774 sym
->redirect
= SYMBOL_VARALIAS
;
775 SET_SYMBOL_ALIAS (sym
, XSYMBOL (base_variable
));
776 sym
->constant
= SYMBOL_CONSTANT_P (base_variable
);
777 LOADHIST_ATTACH (new_alias
);
778 /* Even if docstring is nil: remove old docstring. */
779 Fput (new_alias
, Qvariable_documentation
, docstring
);
781 return base_variable
;
785 DEFUN ("defvar", Fdefvar
, Sdefvar
, 1, UNEVALLED
, 0,
786 doc
: /* Define SYMBOL as a variable, and return SYMBOL.
787 You are not required to define a variable in order to use it,
788 but the definition can supply documentation and an initial value
789 in a way that tags can recognize.
791 INITVALUE is evaluated, and used to set SYMBOL, only if SYMBOL's value is void.
792 If SYMBOL is buffer-local, its default value is what is set;
793 buffer-local values are not affected.
794 INITVALUE and DOCSTRING are optional.
795 If DOCSTRING starts with *, this variable is identified as a user option.
796 This means that M-x set-variable recognizes it.
797 See also `user-variable-p'.
798 If INITVALUE is missing, SYMBOL's value is not set.
800 If SYMBOL has a local binding, then this form affects the local
801 binding. This is usually not what you want. Thus, if you need to
802 load a file defining variables, with this form or with `defconst' or
803 `defcustom', you should always load that file _outside_ any bindings
804 for these variables. \(`defconst' and `defcustom' behave similarly in
806 usage: (defvar SYMBOL &optional INITVALUE DOCSTRING) */)
809 register Lisp_Object sym
, tem
, tail
;
813 if (!NILP (Fcdr (Fcdr (tail
))))
814 error ("Too many arguments");
816 tem
= Fdefault_boundp (sym
);
819 /* Do it before evaluating the initial value, for self-references. */
820 XSYMBOL (sym
)->declared_special
= 1;
822 if (SYMBOL_CONSTANT_P (sym
))
824 /* For upward compatibility, allow (defvar :foo (quote :foo)). */
825 Lisp_Object tem1
= Fcar (tail
);
827 && EQ (XCAR (tem1
), Qquote
)
828 && CONSP (XCDR (tem1
))
829 && EQ (XCAR (XCDR (tem1
)), sym
)))
830 error ("Constant symbol `%s' specified in defvar",
831 SDATA (SYMBOL_NAME (sym
)));
835 Fset_default (sym
, eval_sub (Fcar (tail
)));
837 { /* Check if there is really a global binding rather than just a let
838 binding that shadows the global unboundness of the var. */
839 volatile struct specbinding
*pdl
= specpdl_ptr
;
840 while (--pdl
>= specpdl
)
842 if (EQ (pdl
->symbol
, sym
) && !pdl
->func
843 && EQ (pdl
->old_value
, Qunbound
))
845 message_with_string ("Warning: defvar ignored because %s is let-bound",
846 SYMBOL_NAME (sym
), 1);
855 if (!NILP (Vpurify_flag
))
856 tem
= Fpurecopy (tem
);
857 Fput (sym
, Qvariable_documentation
, tem
);
859 LOADHIST_ATTACH (sym
);
861 else if (!NILP (Vinternal_interpreter_environment
)
862 && !XSYMBOL (sym
)->declared_special
)
863 /* A simple (defvar foo) with lexical scoping does "nothing" except
864 declare that var to be dynamically scoped *locally* (i.e. within
865 the current file or let-block). */
866 Vinternal_interpreter_environment
=
867 Fcons (sym
, Vinternal_interpreter_environment
);
870 /* Simple (defvar <var>) should not count as a definition at all.
871 It could get in the way of other definitions, and unloading this
872 package could try to make the variable unbound. */
878 DEFUN ("defconst", Fdefconst
, Sdefconst
, 2, UNEVALLED
, 0,
879 doc
: /* Define SYMBOL as a constant variable.
880 The intent is that neither programs nor users should ever change this value.
881 Always sets the value of SYMBOL to the result of evalling INITVALUE.
882 If SYMBOL is buffer-local, its default value is what is set;
883 buffer-local values are not affected.
884 DOCSTRING is optional.
886 If SYMBOL has a local binding, then this form sets the local binding's
887 value. However, you should normally not make local bindings for
888 variables defined with this form.
889 usage: (defconst SYMBOL INITVALUE [DOCSTRING]) */)
892 register Lisp_Object sym
, tem
;
895 if (!NILP (Fcdr (Fcdr (Fcdr (args
)))))
896 error ("Too many arguments");
898 tem
= eval_sub (Fcar (Fcdr (args
)));
899 if (!NILP (Vpurify_flag
))
900 tem
= Fpurecopy (tem
);
901 Fset_default (sym
, tem
);
902 XSYMBOL (sym
)->declared_special
= 1;
903 tem
= Fcar (Fcdr (Fcdr (args
)));
906 if (!NILP (Vpurify_flag
))
907 tem
= Fpurecopy (tem
);
908 Fput (sym
, Qvariable_documentation
, tem
);
910 Fput (sym
, Qrisky_local_variable
, Qt
);
911 LOADHIST_ATTACH (sym
);
915 /* Error handler used in Fuser_variable_p. */
917 user_variable_p_eh (Lisp_Object ignore
)
923 lisp_indirect_variable (Lisp_Object sym
)
925 struct Lisp_Symbol
*s
= indirect_variable (XSYMBOL (sym
));
930 DEFUN ("user-variable-p", Fuser_variable_p
, Suser_variable_p
, 1, 1, 0,
931 doc
: /* Return t if VARIABLE is intended to be set and modified by users.
932 \(The alternative is a variable used internally in a Lisp program.)
933 A variable is a user variable if
934 \(1) the first character of its documentation is `*', or
935 \(2) it is customizable (its property list contains a non-nil value
936 of `standard-value' or `custom-autoload'), or
937 \(3) it is an alias for another user variable.
938 Return nil if VARIABLE is an alias and there is a loop in the
939 chain of symbols. */)
940 (Lisp_Object variable
)
942 Lisp_Object documentation
;
944 if (!SYMBOLP (variable
))
947 /* If indirect and there's an alias loop, don't check anything else. */
948 if (XSYMBOL (variable
)->redirect
== SYMBOL_VARALIAS
949 && NILP (internal_condition_case_1 (lisp_indirect_variable
, variable
,
950 Qt
, user_variable_p_eh
)))
955 documentation
= Fget (variable
, Qvariable_documentation
);
956 if (INTEGERP (documentation
) && XINT (documentation
) < 0)
958 if (STRINGP (documentation
)
959 && ((unsigned char) SREF (documentation
, 0) == '*'))
961 /* If it is (STRING . INTEGER), a negative integer means a user variable. */
962 if (CONSP (documentation
)
963 && STRINGP (XCAR (documentation
))
964 && INTEGERP (XCDR (documentation
))
965 && XINT (XCDR (documentation
)) < 0)
967 /* Customizable? See `custom-variable-p'. */
968 if ((!NILP (Fget (variable
, intern ("standard-value"))))
969 || (!NILP (Fget (variable
, intern ("custom-autoload")))))
972 if (!(XSYMBOL (variable
)->redirect
== SYMBOL_VARALIAS
))
975 /* An indirect variable? Let's follow the chain. */
976 XSETSYMBOL (variable
, SYMBOL_ALIAS (XSYMBOL (variable
)));
980 DEFUN ("let*", FletX
, SletX
, 1, UNEVALLED
, 0,
981 doc
: /* Bind variables according to VARLIST then eval BODY.
982 The value of the last form in BODY is returned.
983 Each element of VARLIST is a symbol (which is bound to nil)
984 or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM).
985 Each VALUEFORM can refer to the symbols already bound by this VARLIST.
986 usage: (let* VARLIST BODY...) */)
989 Lisp_Object varlist
, var
, val
, elt
, lexenv
;
990 int count
= SPECPDL_INDEX ();
991 struct gcpro gcpro1
, gcpro2
, gcpro3
;
993 GCPRO3 (args
, elt
, varlist
);
995 lexenv
= Vinternal_interpreter_environment
;
997 varlist
= Fcar (args
);
998 while (CONSP (varlist
))
1002 elt
= XCAR (varlist
);
1008 else if (! NILP (Fcdr (Fcdr (elt
))))
1009 signal_error ("`let' bindings can have only one value-form", elt
);
1013 val
= eval_sub (Fcar (Fcdr (elt
)));
1016 if (!NILP (lexenv
) && SYMBOLP (var
)
1017 && !XSYMBOL (var
)->declared_special
1018 && NILP (Fmemq (var
, Vinternal_interpreter_environment
)))
1019 /* Lexically bind VAR by adding it to the interpreter's binding
1023 = Fcons (Fcons (var
, val
), Vinternal_interpreter_environment
);
1024 if (EQ (Vinternal_interpreter_environment
, lexenv
))
1025 /* Save the old lexical environment on the specpdl stack,
1026 but only for the first lexical binding, since we'll never
1027 need to revert to one of the intermediate ones. */
1028 specbind (Qinternal_interpreter_environment
, newenv
);
1030 Vinternal_interpreter_environment
= newenv
;
1033 specbind (var
, val
);
1035 varlist
= XCDR (varlist
);
1038 val
= Fprogn (Fcdr (args
));
1039 return unbind_to (count
, val
);
1042 DEFUN ("let", Flet
, Slet
, 1, UNEVALLED
, 0,
1043 doc
: /* Bind variables according to VARLIST then eval BODY.
1044 The value of the last form in BODY is returned.
1045 Each element of VARLIST is a symbol (which is bound to nil)
1046 or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM).
1047 All the VALUEFORMs are evalled before any symbols are bound.
1048 usage: (let VARLIST BODY...) */)
1051 Lisp_Object
*temps
, tem
, lexenv
;
1052 register Lisp_Object elt
, varlist
;
1053 int count
= SPECPDL_INDEX ();
1054 register size_t argnum
;
1055 struct gcpro gcpro1
, gcpro2
;
1058 varlist
= Fcar (args
);
1060 /* Make space to hold the values to give the bound variables. */
1061 elt
= Flength (varlist
);
1062 SAFE_ALLOCA_LISP (temps
, XFASTINT (elt
));
1064 /* Compute the values and store them in `temps'. */
1066 GCPRO2 (args
, *temps
);
1069 for (argnum
= 0; CONSP (varlist
); varlist
= XCDR (varlist
))
1072 elt
= XCAR (varlist
);
1074 temps
[argnum
++] = Qnil
;
1075 else if (! NILP (Fcdr (Fcdr (elt
))))
1076 signal_error ("`let' bindings can have only one value-form", elt
);
1078 temps
[argnum
++] = eval_sub (Fcar (Fcdr (elt
)));
1079 gcpro2
.nvars
= argnum
;
1083 lexenv
= Vinternal_interpreter_environment
;
1085 varlist
= Fcar (args
);
1086 for (argnum
= 0; CONSP (varlist
); varlist
= XCDR (varlist
))
1090 elt
= XCAR (varlist
);
1091 var
= SYMBOLP (elt
) ? elt
: Fcar (elt
);
1092 tem
= temps
[argnum
++];
1094 if (!NILP (lexenv
) && SYMBOLP (var
)
1095 && !XSYMBOL (var
)->declared_special
1096 && NILP (Fmemq (var
, Vinternal_interpreter_environment
)))
1097 /* Lexically bind VAR by adding it to the lexenv alist. */
1098 lexenv
= Fcons (Fcons (var
, tem
), lexenv
);
1100 /* Dynamically bind VAR. */
1101 specbind (var
, tem
);
1104 if (!EQ (lexenv
, Vinternal_interpreter_environment
))
1105 /* Instantiate a new lexical environment. */
1106 specbind (Qinternal_interpreter_environment
, lexenv
);
1108 elt
= Fprogn (Fcdr (args
));
1110 return unbind_to (count
, elt
);
1113 DEFUN ("while", Fwhile
, Swhile
, 1, UNEVALLED
, 0,
1114 doc
: /* If TEST yields non-nil, eval BODY... and repeat.
1115 The order of execution is thus TEST, BODY, TEST, BODY and so on
1116 until TEST returns nil.
1117 usage: (while TEST BODY...) */)
1120 Lisp_Object test
, body
;
1121 struct gcpro gcpro1
, gcpro2
;
1123 GCPRO2 (test
, body
);
1127 while (!NILP (eval_sub (test
)))
1137 DEFUN ("macroexpand", Fmacroexpand
, Smacroexpand
, 1, 2, 0,
1138 doc
: /* Return result of expanding macros at top level of FORM.
1139 If FORM is not a macro call, it is returned unchanged.
1140 Otherwise, the macro is expanded and the expansion is considered
1141 in place of FORM. When a non-macro-call results, it is returned.
1143 The second optional arg ENVIRONMENT specifies an environment of macro
1144 definitions to shadow the loaded ones for use in file byte-compilation. */)
1145 (Lisp_Object form
, Lisp_Object environment
)
1147 /* With cleanups from Hallvard Furuseth. */
1148 register Lisp_Object expander
, sym
, def
, tem
;
1152 /* Come back here each time we expand a macro call,
1153 in case it expands into another macro call. */
1156 /* Set SYM, give DEF and TEM right values in case SYM is not a symbol. */
1157 def
= sym
= XCAR (form
);
1159 /* Trace symbols aliases to other symbols
1160 until we get a symbol that is not an alias. */
1161 while (SYMBOLP (def
))
1165 tem
= Fassq (sym
, environment
);
1168 def
= XSYMBOL (sym
)->function
;
1169 if (!EQ (def
, Qunbound
))
1174 /* Right now TEM is the result from SYM in ENVIRONMENT,
1175 and if TEM is nil then DEF is SYM's function definition. */
1178 /* SYM is not mentioned in ENVIRONMENT.
1179 Look at its function definition. */
1180 if (EQ (def
, Qunbound
) || !CONSP (def
))
1181 /* Not defined or definition not suitable. */
1183 if (EQ (XCAR (def
), Qautoload
))
1185 /* Autoloading function: will it be a macro when loaded? */
1186 tem
= Fnth (make_number (4), def
);
1187 if (EQ (tem
, Qt
) || EQ (tem
, Qmacro
))
1188 /* Yes, load it and try again. */
1190 struct gcpro gcpro1
;
1192 do_autoload (def
, sym
);
1199 else if (!EQ (XCAR (def
), Qmacro
))
1201 else expander
= XCDR (def
);
1205 expander
= XCDR (tem
);
1206 if (NILP (expander
))
1209 form
= apply1 (expander
, XCDR (form
));
1214 DEFUN ("catch", Fcatch
, Scatch
, 1, UNEVALLED
, 0,
1215 doc
: /* Eval BODY allowing nonlocal exits using `throw'.
1216 TAG is evalled to get the tag to use; it must not be nil.
1218 Then the BODY is executed.
1219 Within BODY, a call to `throw' with the same TAG exits BODY and this `catch'.
1220 If no throw happens, `catch' returns the value of the last BODY form.
1221 If a throw happens, it specifies the value to return from `catch'.
1222 usage: (catch TAG BODY...) */)
1225 register Lisp_Object tag
;
1226 struct gcpro gcpro1
;
1229 tag
= eval_sub (Fcar (args
));
1231 return internal_catch (tag
, Fprogn
, Fcdr (args
));
1234 /* Set up a catch, then call C function FUNC on argument ARG.
1235 FUNC should return a Lisp_Object.
1236 This is how catches are done from within C code. */
1239 internal_catch (Lisp_Object tag
, Lisp_Object (*func
) (Lisp_Object
), Lisp_Object arg
)
1241 /* This structure is made part of the chain `catchlist'. */
1244 /* Fill in the components of c, and put it on the list. */
1248 c
.backlist
= backtrace_list
;
1249 c
.handlerlist
= handlerlist
;
1250 c
.lisp_eval_depth
= lisp_eval_depth
;
1251 c
.pdlcount
= SPECPDL_INDEX ();
1252 c
.poll_suppress_count
= poll_suppress_count
;
1253 c
.interrupt_input_blocked
= interrupt_input_blocked
;
1254 c
.gcpro
= gcprolist
;
1255 c
.byte_stack
= byte_stack_list
;
1259 if (! _setjmp (c
.jmp
))
1260 c
.val
= (*func
) (arg
);
1262 /* Throw works by a longjmp that comes right here. */
1267 /* Unwind the specbind, catch, and handler stacks back to CATCH, and
1268 jump to that CATCH, returning VALUE as the value of that catch.
1270 This is the guts Fthrow and Fsignal; they differ only in the way
1271 they choose the catch tag to throw to. A catch tag for a
1272 condition-case form has a TAG of Qnil.
1274 Before each catch is discarded, unbind all special bindings and
1275 execute all unwind-protect clauses made above that catch. Unwind
1276 the handler stack as we go, so that the proper handlers are in
1277 effect for each unwind-protect clause we run. At the end, restore
1278 some static info saved in CATCH, and longjmp to the location
1281 This is used for correct unwinding in Fthrow and Fsignal. */
1284 unwind_to_catch (struct catchtag
*catch, Lisp_Object value
)
1286 register int last_time
;
1288 /* Save the value in the tag. */
1291 /* Restore certain special C variables. */
1292 set_poll_suppress_count (catch->poll_suppress_count
);
1293 UNBLOCK_INPUT_TO (catch->interrupt_input_blocked
);
1294 handling_signal
= 0;
1299 last_time
= catchlist
== catch;
1301 /* Unwind the specpdl stack, and then restore the proper set of
1303 unbind_to (catchlist
->pdlcount
, Qnil
);
1304 handlerlist
= catchlist
->handlerlist
;
1305 catchlist
= catchlist
->next
;
1307 while (! last_time
);
1310 /* If x_catch_errors was done, turn it off now.
1311 (First we give unbind_to a chance to do that.) */
1312 #if 0 /* This would disable x_catch_errors after x_connection_closed.
1313 The catch must remain in effect during that delicate
1314 state. --lorentey */
1315 x_fully_uncatch_errors ();
1319 byte_stack_list
= catch->byte_stack
;
1320 gcprolist
= catch->gcpro
;
1322 gcpro_level
= gcprolist
? gcprolist
->level
+ 1 : 0;
1324 backtrace_list
= catch->backlist
;
1325 lisp_eval_depth
= catch->lisp_eval_depth
;
1327 _longjmp (catch->jmp
, 1);
1330 DEFUN ("throw", Fthrow
, Sthrow
, 2, 2, 0,
1331 doc
: /* Throw to the catch for TAG and return VALUE from it.
1332 Both TAG and VALUE are evalled. */)
1333 (register Lisp_Object tag
, Lisp_Object value
)
1335 register struct catchtag
*c
;
1338 for (c
= catchlist
; c
; c
= c
->next
)
1340 if (EQ (c
->tag
, tag
))
1341 unwind_to_catch (c
, value
);
1343 xsignal2 (Qno_catch
, tag
, value
);
1347 DEFUN ("unwind-protect", Funwind_protect
, Sunwind_protect
, 1, UNEVALLED
, 0,
1348 doc
: /* Do BODYFORM, protecting with UNWINDFORMS.
1349 If BODYFORM completes normally, its value is returned
1350 after executing the UNWINDFORMS.
1351 If BODYFORM exits nonlocally, the UNWINDFORMS are executed anyway.
1352 usage: (unwind-protect BODYFORM UNWINDFORMS...) */)
1356 int count
= SPECPDL_INDEX ();
1358 record_unwind_protect (Fprogn
, Fcdr (args
));
1359 val
= eval_sub (Fcar (args
));
1360 return unbind_to (count
, val
);
1363 DEFUN ("condition-case", Fcondition_case
, Scondition_case
, 2, UNEVALLED
, 0,
1364 doc
: /* Regain control when an error is signaled.
1365 Executes BODYFORM and returns its value if no error happens.
1366 Each element of HANDLERS looks like (CONDITION-NAME BODY...)
1367 where the BODY is made of Lisp expressions.
1369 A handler is applicable to an error
1370 if CONDITION-NAME is one of the error's condition names.
1371 If an error happens, the first applicable handler is run.
1373 The car of a handler may be a list of condition names
1374 instead of a single condition name. Then it handles all of them.
1376 When a handler handles an error, control returns to the `condition-case'
1377 and it executes the handler's BODY...
1378 with VAR bound to (ERROR-SYMBOL . SIGNAL-DATA) from the error.
1379 \(If VAR is nil, the handler can't access that information.)
1380 Then the value of the last BODY form is returned from the `condition-case'
1383 See also the function `signal' for more info.
1384 usage: (condition-case VAR BODYFORM &rest HANDLERS) */)
1387 register Lisp_Object bodyform
, handlers
;
1388 volatile Lisp_Object var
;
1391 bodyform
= Fcar (Fcdr (args
));
1392 handlers
= Fcdr (Fcdr (args
));
1394 return internal_lisp_condition_case (var
, bodyform
, handlers
);
1397 /* Like Fcondition_case, but the args are separate
1398 rather than passed in a list. Used by Fbyte_code. */
1401 internal_lisp_condition_case (volatile Lisp_Object var
, Lisp_Object bodyform
,
1402 Lisp_Object handlers
)
1410 for (val
= handlers
; CONSP (val
); val
= XCDR (val
))
1416 && (SYMBOLP (XCAR (tem
))
1417 || CONSP (XCAR (tem
))))))
1418 error ("Invalid condition handler");
1423 c
.backlist
= backtrace_list
;
1424 c
.handlerlist
= handlerlist
;
1425 c
.lisp_eval_depth
= lisp_eval_depth
;
1426 c
.pdlcount
= SPECPDL_INDEX ();
1427 c
.poll_suppress_count
= poll_suppress_count
;
1428 c
.interrupt_input_blocked
= interrupt_input_blocked
;
1429 c
.gcpro
= gcprolist
;
1430 c
.byte_stack
= byte_stack_list
;
1431 if (_setjmp (c
.jmp
))
1434 specbind (h
.var
, c
.val
);
1435 val
= Fprogn (Fcdr (h
.chosen_clause
));
1437 /* Note that this just undoes the binding of h.var; whoever
1438 longjumped to us unwound the stack to c.pdlcount before
1440 unbind_to (c
.pdlcount
, Qnil
);
1447 h
.handler
= handlers
;
1448 h
.next
= handlerlist
;
1452 val
= eval_sub (bodyform
);
1454 handlerlist
= h
.next
;
1458 /* Call the function BFUN with no arguments, catching errors within it
1459 according to HANDLERS. If there is an error, call HFUN with
1460 one argument which is the data that describes the error:
1463 HANDLERS can be a list of conditions to catch.
1464 If HANDLERS is Qt, catch all errors.
1465 If HANDLERS is Qerror, catch all errors
1466 but allow the debugger to run if that is enabled. */
1469 internal_condition_case (Lisp_Object (*bfun
) (void), Lisp_Object handlers
,
1470 Lisp_Object (*hfun
) (Lisp_Object
))
1476 /* Since Fsignal will close off all calls to x_catch_errors,
1477 we will get the wrong results if some are not closed now. */
1479 if (x_catching_errors ())
1485 c
.backlist
= backtrace_list
;
1486 c
.handlerlist
= handlerlist
;
1487 c
.lisp_eval_depth
= lisp_eval_depth
;
1488 c
.pdlcount
= SPECPDL_INDEX ();
1489 c
.poll_suppress_count
= poll_suppress_count
;
1490 c
.interrupt_input_blocked
= interrupt_input_blocked
;
1491 c
.gcpro
= gcprolist
;
1492 c
.byte_stack
= byte_stack_list
;
1493 if (_setjmp (c
.jmp
))
1495 return (*hfun
) (c
.val
);
1499 h
.handler
= handlers
;
1501 h
.next
= handlerlist
;
1507 handlerlist
= h
.next
;
1511 /* Like internal_condition_case but call BFUN with ARG as its argument. */
1514 internal_condition_case_1 (Lisp_Object (*bfun
) (Lisp_Object
), Lisp_Object arg
,
1515 Lisp_Object handlers
, Lisp_Object (*hfun
) (Lisp_Object
))
1521 /* Since Fsignal will close off all calls to x_catch_errors,
1522 we will get the wrong results if some are not closed now. */
1524 if (x_catching_errors ())
1530 c
.backlist
= backtrace_list
;
1531 c
.handlerlist
= handlerlist
;
1532 c
.lisp_eval_depth
= lisp_eval_depth
;
1533 c
.pdlcount
= SPECPDL_INDEX ();
1534 c
.poll_suppress_count
= poll_suppress_count
;
1535 c
.interrupt_input_blocked
= interrupt_input_blocked
;
1536 c
.gcpro
= gcprolist
;
1537 c
.byte_stack
= byte_stack_list
;
1538 if (_setjmp (c
.jmp
))
1540 return (*hfun
) (c
.val
);
1544 h
.handler
= handlers
;
1546 h
.next
= handlerlist
;
1550 val
= (*bfun
) (arg
);
1552 handlerlist
= h
.next
;
1556 /* Like internal_condition_case_1 but call BFUN with ARG1 and ARG2 as
1560 internal_condition_case_2 (Lisp_Object (*bfun
) (Lisp_Object
, Lisp_Object
),
1563 Lisp_Object handlers
,
1564 Lisp_Object (*hfun
) (Lisp_Object
))
1570 /* Since Fsignal will close off all calls to x_catch_errors,
1571 we will get the wrong results if some are not closed now. */
1573 if (x_catching_errors ())
1579 c
.backlist
= backtrace_list
;
1580 c
.handlerlist
= handlerlist
;
1581 c
.lisp_eval_depth
= lisp_eval_depth
;
1582 c
.pdlcount
= SPECPDL_INDEX ();
1583 c
.poll_suppress_count
= poll_suppress_count
;
1584 c
.interrupt_input_blocked
= interrupt_input_blocked
;
1585 c
.gcpro
= gcprolist
;
1586 c
.byte_stack
= byte_stack_list
;
1587 if (_setjmp (c
.jmp
))
1589 return (*hfun
) (c
.val
);
1593 h
.handler
= handlers
;
1595 h
.next
= handlerlist
;
1599 val
= (*bfun
) (arg1
, arg2
);
1601 handlerlist
= h
.next
;
1605 /* Like internal_condition_case but call BFUN with NARGS as first,
1606 and ARGS as second argument. */
1609 internal_condition_case_n (Lisp_Object (*bfun
) (size_t, Lisp_Object
*),
1612 Lisp_Object handlers
,
1613 Lisp_Object (*hfun
) (Lisp_Object
))
1619 /* Since Fsignal will close off all calls to x_catch_errors,
1620 we will get the wrong results if some are not closed now. */
1622 if (x_catching_errors ())
1628 c
.backlist
= backtrace_list
;
1629 c
.handlerlist
= handlerlist
;
1630 c
.lisp_eval_depth
= lisp_eval_depth
;
1631 c
.pdlcount
= SPECPDL_INDEX ();
1632 c
.poll_suppress_count
= poll_suppress_count
;
1633 c
.interrupt_input_blocked
= interrupt_input_blocked
;
1634 c
.gcpro
= gcprolist
;
1635 c
.byte_stack
= byte_stack_list
;
1636 if (_setjmp (c
.jmp
))
1638 return (*hfun
) (c
.val
);
1642 h
.handler
= handlers
;
1644 h
.next
= handlerlist
;
1648 val
= (*bfun
) (nargs
, args
);
1650 handlerlist
= h
.next
;
1655 static Lisp_Object
find_handler_clause (Lisp_Object
, Lisp_Object
,
1656 Lisp_Object
, Lisp_Object
);
1657 static int maybe_call_debugger (Lisp_Object conditions
, Lisp_Object sig
,
1660 DEFUN ("signal", Fsignal
, Ssignal
, 2, 2, 0,
1661 doc
: /* Signal an error. Args are ERROR-SYMBOL and associated DATA.
1662 This function does not return.
1664 An error symbol is a symbol with an `error-conditions' property
1665 that is a list of condition names.
1666 A handler for any of those names will get to handle this signal.
1667 The symbol `error' should normally be one of them.
1669 DATA should be a list. Its elements are printed as part of the error message.
1670 See Info anchor `(elisp)Definition of signal' for some details on how this
1671 error message is constructed.
1672 If the signal is handled, DATA is made available to the handler.
1673 See also the function `condition-case'. */)
1674 (Lisp_Object error_symbol
, Lisp_Object data
)
1676 /* When memory is full, ERROR-SYMBOL is nil,
1677 and DATA is (REAL-ERROR-SYMBOL . REAL-DATA).
1678 That is a special case--don't do this in other situations. */
1679 Lisp_Object conditions
;
1681 Lisp_Object real_error_symbol
1682 = (NILP (error_symbol
) ? Fcar (data
) : error_symbol
);
1683 register Lisp_Object clause
= Qnil
;
1685 struct backtrace
*bp
;
1687 immediate_quit
= handling_signal
= 0;
1689 if (gc_in_progress
|| waiting_for_input
)
1692 #if 0 /* rms: I don't know why this was here,
1693 but it is surely wrong for an error that is handled. */
1694 #ifdef HAVE_WINDOW_SYSTEM
1695 if (display_hourglass_p
)
1696 cancel_hourglass ();
1700 /* This hook is used by edebug. */
1701 if (! NILP (Vsignal_hook_function
)
1702 && ! NILP (error_symbol
))
1704 /* Edebug takes care of restoring these variables when it exits. */
1705 if (lisp_eval_depth
+ 20 > max_lisp_eval_depth
)
1706 max_lisp_eval_depth
= lisp_eval_depth
+ 20;
1708 if (SPECPDL_INDEX () + 40 > max_specpdl_size
)
1709 max_specpdl_size
= SPECPDL_INDEX () + 40;
1711 call2 (Vsignal_hook_function
, error_symbol
, data
);
1714 conditions
= Fget (real_error_symbol
, Qerror_conditions
);
1716 /* Remember from where signal was called. Skip over the frame for
1717 `signal' itself. If a frame for `error' follows, skip that,
1718 too. Don't do this when ERROR_SYMBOL is nil, because that
1719 is a memory-full error. */
1720 Vsignaling_function
= Qnil
;
1721 if (backtrace_list
&& !NILP (error_symbol
))
1723 bp
= backtrace_list
->next
;
1724 if (bp
&& bp
->function
&& EQ (*bp
->function
, Qerror
))
1726 if (bp
&& bp
->function
)
1727 Vsignaling_function
= *bp
->function
;
1730 for (h
= handlerlist
; h
; h
= h
->next
)
1732 clause
= find_handler_clause (h
->handler
, conditions
,
1733 error_symbol
, data
);
1738 if (/* Don't run the debugger for a memory-full error.
1739 (There is no room in memory to do that!) */
1740 !NILP (error_symbol
)
1741 && (!NILP (Vdebug_on_signal
)
1742 /* If no handler is present now, try to run the debugger. */
1744 /* Special handler that means "print a message and run debugger
1746 || EQ (h
->handler
, Qerror
)))
1749 = maybe_call_debugger (conditions
, error_symbol
, data
);
1750 /* We can't return values to code which signaled an error, but we
1751 can continue code which has signaled a quit. */
1752 if (debugger_called
&& EQ (real_error_symbol
, Qquit
))
1758 Lisp_Object unwind_data
1759 = (NILP (error_symbol
) ? data
: Fcons (error_symbol
, data
));
1761 h
->chosen_clause
= clause
;
1762 unwind_to_catch (h
->tag
, unwind_data
);
1767 Fthrow (Qtop_level
, Qt
);
1770 if (! NILP (error_symbol
))
1771 data
= Fcons (error_symbol
, data
);
1773 string
= Ferror_message_string (data
);
1774 fatal ("%s", SDATA (string
));
1777 /* Internal version of Fsignal that never returns.
1778 Used for anything but Qquit (which can return from Fsignal). */
1781 xsignal (Lisp_Object error_symbol
, Lisp_Object data
)
1783 Fsignal (error_symbol
, data
);
1787 /* Like xsignal, but takes 0, 1, 2, or 3 args instead of a list. */
1790 xsignal0 (Lisp_Object error_symbol
)
1792 xsignal (error_symbol
, Qnil
);
1796 xsignal1 (Lisp_Object error_symbol
, Lisp_Object arg
)
1798 xsignal (error_symbol
, list1 (arg
));
1802 xsignal2 (Lisp_Object error_symbol
, Lisp_Object arg1
, Lisp_Object arg2
)
1804 xsignal (error_symbol
, list2 (arg1
, arg2
));
1808 xsignal3 (Lisp_Object error_symbol
, Lisp_Object arg1
, Lisp_Object arg2
, Lisp_Object arg3
)
1810 xsignal (error_symbol
, list3 (arg1
, arg2
, arg3
));
1813 /* Signal `error' with message S, and additional arg ARG.
1814 If ARG is not a genuine list, make it a one-element list. */
1817 signal_error (const char *s
, Lisp_Object arg
)
1819 Lisp_Object tortoise
, hare
;
1821 hare
= tortoise
= arg
;
1822 while (CONSP (hare
))
1829 tortoise
= XCDR (tortoise
);
1831 if (EQ (hare
, tortoise
))
1836 arg
= Fcons (arg
, Qnil
); /* Make it a list. */
1838 xsignal (Qerror
, Fcons (build_string (s
), arg
));
1842 /* Return nonzero if LIST is a non-nil atom or
1843 a list containing one of CONDITIONS. */
1846 wants_debugger (Lisp_Object list
, Lisp_Object conditions
)
1853 while (CONSP (conditions
))
1855 Lisp_Object
this, tail
;
1856 this = XCAR (conditions
);
1857 for (tail
= list
; CONSP (tail
); tail
= XCDR (tail
))
1858 if (EQ (XCAR (tail
), this))
1860 conditions
= XCDR (conditions
);
1865 /* Return 1 if an error with condition-symbols CONDITIONS,
1866 and described by SIGNAL-DATA, should skip the debugger
1867 according to debugger-ignored-errors. */
1870 skip_debugger (Lisp_Object conditions
, Lisp_Object data
)
1873 int first_string
= 1;
1874 Lisp_Object error_message
;
1876 error_message
= Qnil
;
1877 for (tail
= Vdebug_ignored_errors
; CONSP (tail
); tail
= XCDR (tail
))
1879 if (STRINGP (XCAR (tail
)))
1883 error_message
= Ferror_message_string (data
);
1887 if (fast_string_match (XCAR (tail
), error_message
) >= 0)
1892 Lisp_Object contail
;
1894 for (contail
= conditions
; CONSP (contail
); contail
= XCDR (contail
))
1895 if (EQ (XCAR (tail
), XCAR (contail
)))
1903 /* Call the debugger if calling it is currently enabled for CONDITIONS.
1904 SIG and DATA describe the signal, as in find_handler_clause. */
1907 maybe_call_debugger (Lisp_Object conditions
, Lisp_Object sig
, Lisp_Object data
)
1909 Lisp_Object combined_data
;
1911 combined_data
= Fcons (sig
, data
);
1914 /* Don't try to run the debugger with interrupts blocked.
1915 The editing loop would return anyway. */
1917 /* Does user want to enter debugger for this kind of error? */
1920 : wants_debugger (Vdebug_on_error
, conditions
))
1921 && ! skip_debugger (conditions
, combined_data
)
1922 /* RMS: What's this for? */
1923 && when_entered_debugger
< num_nonmacro_input_events
)
1925 call_debugger (Fcons (Qerror
, Fcons (combined_data
, Qnil
)));
1932 /* Value of Qlambda means we have called debugger and user has continued.
1933 There are two ways to pass SIG and DATA:
1934 = SIG is the error symbol, and DATA is the rest of the data.
1935 = SIG is nil, and DATA is (SYMBOL . REST-OF-DATA).
1936 This is for memory-full errors only.
1938 We need to increase max_specpdl_size temporarily around
1939 anything we do that can push on the specpdl, so as not to get
1940 a second error here in case we're handling specpdl overflow. */
1943 find_handler_clause (Lisp_Object handlers
, Lisp_Object conditions
,
1944 Lisp_Object sig
, Lisp_Object data
)
1946 register Lisp_Object h
;
1948 /* t is used by handlers for all conditions, set up by C code. */
1949 if (EQ (handlers
, Qt
))
1952 /* error is used similarly, but means print an error message
1953 and run the debugger if that is enabled. */
1954 if (EQ (handlers
, Qerror
))
1957 for (h
= handlers
; CONSP (h
); h
= XCDR (h
))
1959 Lisp_Object handler
= XCAR (h
);
1960 Lisp_Object condit
, tem
;
1962 if (!CONSP (handler
))
1964 condit
= XCAR (handler
);
1965 /* Handle a single condition name in handler HANDLER. */
1966 if (SYMBOLP (condit
))
1968 tem
= Fmemq (Fcar (handler
), conditions
);
1972 /* Handle a list of condition names in handler HANDLER. */
1973 else if (CONSP (condit
))
1976 for (tail
= condit
; CONSP (tail
); tail
= XCDR (tail
))
1978 tem
= Fmemq (XCAR (tail
), conditions
);
1989 /* Dump an error message; called like vprintf. */
1991 verror (const char *m
, va_list ap
)
1994 size_t size
= sizeof buf
;
1996 min (MOST_POSITIVE_FIXNUM
, min (INT_MAX
, SIZE_MAX
- 1)) + 1;
2003 used
= vsnprintf (buffer
, size
, m
, ap
);
2007 /* Non-C99 vsnprintf, such as w32, returns -1 when SIZE is too small.
2008 Guess a larger USED to work around the incompatibility. */
2009 used
= (size
<= size_max
/ 2 ? 2 * size
2010 : size
< size_max
? size_max
- 1
2013 else if (used
< size
)
2015 if (size_max
<= used
)
2021 buffer
= (char *) xmalloc (size
);
2024 string
= make_string (buffer
, used
);
2028 xsignal1 (Qerror
, string
);
2032 /* Dump an error message; called like printf. */
2036 error (const char *m
, ...)
2044 DEFUN ("commandp", Fcommandp
, Scommandp
, 1, 2, 0,
2045 doc
: /* Non-nil if FUNCTION makes provisions for interactive calling.
2046 This means it contains a description for how to read arguments to give it.
2047 The value is nil for an invalid function or a symbol with no function
2050 Interactively callable functions include strings and vectors (treated
2051 as keyboard macros), lambda-expressions that contain a top-level call
2052 to `interactive', autoload definitions made by `autoload' with non-nil
2053 fourth argument, and some of the built-in functions of Lisp.
2055 Also, a symbol satisfies `commandp' if its function definition does so.
2057 If the optional argument FOR-CALL-INTERACTIVELY is non-nil,
2058 then strings and vectors are not accepted. */)
2059 (Lisp_Object function
, Lisp_Object for_call_interactively
)
2061 register Lisp_Object fun
;
2062 register Lisp_Object funcar
;
2063 Lisp_Object if_prop
= Qnil
;
2067 fun
= indirect_function (fun
); /* Check cycles. */
2068 if (NILP (fun
) || EQ (fun
, Qunbound
))
2071 /* Check an `interactive-form' property if present, analogous to the
2072 function-documentation property. */
2074 while (SYMBOLP (fun
))
2076 Lisp_Object tmp
= Fget (fun
, Qinteractive_form
);
2079 fun
= Fsymbol_function (fun
);
2082 /* Emacs primitives are interactive if their DEFUN specifies an
2083 interactive spec. */
2085 return XSUBR (fun
)->intspec
? Qt
: if_prop
;
2087 /* Bytecode objects are interactive if they are long enough to
2088 have an element whose index is COMPILED_INTERACTIVE, which is
2089 where the interactive spec is stored. */
2090 else if (COMPILEDP (fun
))
2091 return ((ASIZE (fun
) & PSEUDOVECTOR_SIZE_MASK
) > COMPILED_INTERACTIVE
2094 /* Strings and vectors are keyboard macros. */
2095 if (STRINGP (fun
) || VECTORP (fun
))
2096 return (NILP (for_call_interactively
) ? Qt
: Qnil
);
2098 /* Lists may represent commands. */
2101 funcar
= XCAR (fun
);
2102 if (EQ (funcar
, Qclosure
))
2103 return (!NILP (Fassq (Qinteractive
, Fcdr (Fcdr (XCDR (fun
)))))
2105 else if (EQ (funcar
, Qlambda
))
2106 return !NILP (Fassq (Qinteractive
, Fcdr (XCDR (fun
)))) ? Qt
: if_prop
;
2107 else if (EQ (funcar
, Qautoload
))
2108 return !NILP (Fcar (Fcdr (Fcdr (XCDR (fun
))))) ? Qt
: if_prop
;
2113 DEFUN ("autoload", Fautoload
, Sautoload
, 2, 5, 0,
2114 doc
: /* Define FUNCTION to autoload from FILE.
2115 FUNCTION is a symbol; FILE is a file name string to pass to `load'.
2116 Third arg DOCSTRING is documentation for the function.
2117 Fourth arg INTERACTIVE if non-nil says function can be called interactively.
2118 Fifth arg TYPE indicates the type of the object:
2119 nil or omitted says FUNCTION is a function,
2120 `keymap' says FUNCTION is really a keymap, and
2121 `macro' or t says FUNCTION is really a macro.
2122 Third through fifth args give info about the real definition.
2123 They default to nil.
2124 If FUNCTION is already defined other than as an autoload,
2125 this does nothing and returns nil. */)
2126 (Lisp_Object function
, Lisp_Object file
, Lisp_Object docstring
, Lisp_Object interactive
, Lisp_Object type
)
2128 CHECK_SYMBOL (function
);
2129 CHECK_STRING (file
);
2131 /* If function is defined and not as an autoload, don't override. */
2132 if (!EQ (XSYMBOL (function
)->function
, Qunbound
)
2133 && !(CONSP (XSYMBOL (function
)->function
)
2134 && EQ (XCAR (XSYMBOL (function
)->function
), Qautoload
)))
2137 if (NILP (Vpurify_flag
))
2138 /* Only add entries after dumping, because the ones before are
2139 not useful and else we get loads of them from the loaddefs.el. */
2140 LOADHIST_ATTACH (Fcons (Qautoload
, function
));
2142 /* We don't want the docstring in purespace (instead,
2143 Snarf-documentation should (hopefully) overwrite it).
2144 We used to use 0 here, but that leads to accidental sharing in
2145 purecopy's hash-consing, so we use a (hopefully) unique integer
2147 docstring
= make_number (XHASH (function
));
2148 return Ffset (function
,
2149 Fpurecopy (list5 (Qautoload
, file
, docstring
,
2150 interactive
, type
)));
2154 un_autoload (Lisp_Object oldqueue
)
2156 register Lisp_Object queue
, first
, second
;
2158 /* Queue to unwind is current value of Vautoload_queue.
2159 oldqueue is the shadowed value to leave in Vautoload_queue. */
2160 queue
= Vautoload_queue
;
2161 Vautoload_queue
= oldqueue
;
2162 while (CONSP (queue
))
2164 first
= XCAR (queue
);
2165 second
= Fcdr (first
);
2166 first
= Fcar (first
);
2167 if (EQ (first
, make_number (0)))
2170 Ffset (first
, second
);
2171 queue
= XCDR (queue
);
2176 /* Load an autoloaded function.
2177 FUNNAME is the symbol which is the function's name.
2178 FUNDEF is the autoload definition (a list). */
2181 do_autoload (Lisp_Object fundef
, Lisp_Object funname
)
2183 int count
= SPECPDL_INDEX ();
2185 struct gcpro gcpro1
, gcpro2
, gcpro3
;
2187 /* This is to make sure that loadup.el gives a clear picture
2188 of what files are preloaded and when. */
2189 if (! NILP (Vpurify_flag
))
2190 error ("Attempt to autoload %s while preparing to dump",
2191 SDATA (SYMBOL_NAME (funname
)));
2194 CHECK_SYMBOL (funname
);
2195 GCPRO3 (fun
, funname
, fundef
);
2197 /* Preserve the match data. */
2198 record_unwind_save_match_data ();
2200 /* If autoloading gets an error (which includes the error of failing
2201 to define the function being called), we use Vautoload_queue
2202 to undo function definitions and `provide' calls made by
2203 the function. We do this in the specific case of autoloading
2204 because autoloading is not an explicit request "load this file",
2205 but rather a request to "call this function".
2207 The value saved here is to be restored into Vautoload_queue. */
2208 record_unwind_protect (un_autoload
, Vautoload_queue
);
2209 Vautoload_queue
= Qt
;
2210 Fload (Fcar (Fcdr (fundef
)), Qnil
, Qt
, Qnil
, Qt
);
2212 /* Once loading finishes, don't undo it. */
2213 Vautoload_queue
= Qt
;
2214 unbind_to (count
, Qnil
);
2216 fun
= Findirect_function (fun
, Qnil
);
2218 if (!NILP (Fequal (fun
, fundef
)))
2219 error ("Autoloading failed to define function %s",
2220 SDATA (SYMBOL_NAME (funname
)));
2225 DEFUN ("eval", Feval
, Seval
, 1, 2, 0,
2226 doc
: /* Evaluate FORM and return its value.
2227 If LEXICAL is t, evaluate using lexical scoping. */)
2228 (Lisp_Object form
, Lisp_Object lexical
)
2230 int count
= SPECPDL_INDEX ();
2231 specbind (Qinternal_interpreter_environment
,
2232 NILP (lexical
) ? Qnil
: Fcons (Qt
, Qnil
));
2233 return unbind_to (count
, eval_sub (form
));
2236 /* Eval a sub-expression of the current expression (i.e. in the same
2239 eval_sub (Lisp_Object form
)
2241 Lisp_Object fun
, val
, original_fun
, original_args
;
2243 struct backtrace backtrace
;
2244 struct gcpro gcpro1
, gcpro2
, gcpro3
;
2246 if (handling_signal
)
2251 /* Look up its binding in the lexical environment.
2252 We do not pay attention to the declared_special flag here, since we
2253 already did that when let-binding the variable. */
2254 Lisp_Object lex_binding
2255 = !NILP (Vinternal_interpreter_environment
) /* Mere optimization! */
2256 ? Fassq (form
, Vinternal_interpreter_environment
)
2258 if (CONSP (lex_binding
))
2259 return XCDR (lex_binding
);
2261 return Fsymbol_value (form
);
2268 if ((consing_since_gc
> gc_cons_threshold
2269 && consing_since_gc
> gc_relative_threshold
)
2271 (!NILP (Vmemory_full
) && consing_since_gc
> memory_full_cons_threshold
))
2274 Fgarbage_collect ();
2278 if (++lisp_eval_depth
> max_lisp_eval_depth
)
2280 if (max_lisp_eval_depth
< 100)
2281 max_lisp_eval_depth
= 100;
2282 if (lisp_eval_depth
> max_lisp_eval_depth
)
2283 error ("Lisp nesting exceeds `max-lisp-eval-depth'");
2286 original_fun
= Fcar (form
);
2287 original_args
= Fcdr (form
);
2289 backtrace
.next
= backtrace_list
;
2290 backtrace_list
= &backtrace
;
2291 backtrace
.function
= &original_fun
; /* This also protects them from gc. */
2292 backtrace
.args
= &original_args
;
2293 backtrace
.nargs
= UNEVALLED
;
2294 backtrace
.evalargs
= 1;
2295 backtrace
.debug_on_exit
= 0;
2297 if (debug_on_next_call
)
2298 do_debug_on_call (Qt
);
2300 /* At this point, only original_fun and original_args
2301 have values that will be used below. */
2304 /* Optimize for no indirection. */
2306 if (SYMBOLP (fun
) && !EQ (fun
, Qunbound
)
2307 && (fun
= XSYMBOL (fun
)->function
, SYMBOLP (fun
)))
2308 fun
= indirect_function (fun
);
2312 Lisp_Object numargs
;
2313 Lisp_Object argvals
[8];
2314 Lisp_Object args_left
;
2315 register int i
, maxargs
;
2317 args_left
= original_args
;
2318 numargs
= Flength (args_left
);
2322 if (XINT (numargs
) < XSUBR (fun
)->min_args
2323 || (XSUBR (fun
)->max_args
>= 0
2324 && XSUBR (fun
)->max_args
< XINT (numargs
)))
2325 xsignal2 (Qwrong_number_of_arguments
, original_fun
, numargs
);
2327 else if (XSUBR (fun
)->max_args
== UNEVALLED
)
2329 backtrace
.evalargs
= 0;
2330 val
= (XSUBR (fun
)->function
.aUNEVALLED
) (args_left
);
2332 else if (XSUBR (fun
)->max_args
== MANY
)
2334 /* Pass a vector of evaluated arguments. */
2336 register size_t argnum
= 0;
2339 SAFE_ALLOCA_LISP (vals
, XINT (numargs
));
2341 GCPRO3 (args_left
, fun
, fun
);
2345 while (!NILP (args_left
))
2347 vals
[argnum
++] = eval_sub (Fcar (args_left
));
2348 args_left
= Fcdr (args_left
);
2349 gcpro3
.nvars
= argnum
;
2352 backtrace
.args
= vals
;
2353 backtrace
.nargs
= XINT (numargs
);
2355 val
= (XSUBR (fun
)->function
.aMANY
) (XINT (numargs
), vals
);
2361 GCPRO3 (args_left
, fun
, fun
);
2362 gcpro3
.var
= argvals
;
2365 maxargs
= XSUBR (fun
)->max_args
;
2366 for (i
= 0; i
< maxargs
; args_left
= Fcdr (args_left
))
2368 argvals
[i
] = eval_sub (Fcar (args_left
));
2374 backtrace
.args
= argvals
;
2375 backtrace
.nargs
= XINT (numargs
);
2380 val
= (XSUBR (fun
)->function
.a0 ());
2383 val
= (XSUBR (fun
)->function
.a1 (argvals
[0]));
2386 val
= (XSUBR (fun
)->function
.a2 (argvals
[0], argvals
[1]));
2389 val
= (XSUBR (fun
)->function
.a3
2390 (argvals
[0], argvals
[1], argvals
[2]));
2393 val
= (XSUBR (fun
)->function
.a4
2394 (argvals
[0], argvals
[1], argvals
[2], argvals
[3]));
2397 val
= (XSUBR (fun
)->function
.a5
2398 (argvals
[0], argvals
[1], argvals
[2], argvals
[3],
2402 val
= (XSUBR (fun
)->function
.a6
2403 (argvals
[0], argvals
[1], argvals
[2], argvals
[3],
2404 argvals
[4], argvals
[5]));
2407 val
= (XSUBR (fun
)->function
.a7
2408 (argvals
[0], argvals
[1], argvals
[2], argvals
[3],
2409 argvals
[4], argvals
[5], argvals
[6]));
2413 val
= (XSUBR (fun
)->function
.a8
2414 (argvals
[0], argvals
[1], argvals
[2], argvals
[3],
2415 argvals
[4], argvals
[5], argvals
[6], argvals
[7]));
2419 /* Someone has created a subr that takes more arguments than
2420 is supported by this code. We need to either rewrite the
2421 subr to use a different argument protocol, or add more
2422 cases to this switch. */
2427 else if (COMPILEDP (fun
))
2428 val
= apply_lambda (fun
, original_args
);
2431 if (EQ (fun
, Qunbound
))
2432 xsignal1 (Qvoid_function
, original_fun
);
2434 xsignal1 (Qinvalid_function
, original_fun
);
2435 funcar
= XCAR (fun
);
2436 if (!SYMBOLP (funcar
))
2437 xsignal1 (Qinvalid_function
, original_fun
);
2438 if (EQ (funcar
, Qautoload
))
2440 do_autoload (fun
, original_fun
);
2443 if (EQ (funcar
, Qmacro
))
2444 val
= eval_sub (apply1 (Fcdr (fun
), original_args
));
2445 else if (EQ (funcar
, Qlambda
)
2446 || EQ (funcar
, Qclosure
))
2447 val
= apply_lambda (fun
, original_args
);
2449 xsignal1 (Qinvalid_function
, original_fun
);
2454 if (backtrace
.debug_on_exit
)
2455 val
= call_debugger (Fcons (Qexit
, Fcons (val
, Qnil
)));
2456 backtrace_list
= backtrace
.next
;
2461 DEFUN ("apply", Fapply
, Sapply
, 2, MANY
, 0,
2462 doc
: /* Call FUNCTION with our remaining args, using our last arg as list of args.
2463 Then return the value FUNCTION returns.
2464 Thus, (apply '+ 1 2 '(3 4)) returns 10.
2465 usage: (apply FUNCTION &rest ARGUMENTS) */)
2466 (size_t nargs
, Lisp_Object
*args
)
2468 register size_t i
, numargs
;
2469 register Lisp_Object spread_arg
;
2470 register Lisp_Object
*funcall_args
;
2471 Lisp_Object fun
, retval
;
2472 struct gcpro gcpro1
;
2477 spread_arg
= args
[nargs
- 1];
2478 CHECK_LIST (spread_arg
);
2480 numargs
= XINT (Flength (spread_arg
));
2483 return Ffuncall (nargs
- 1, args
);
2484 else if (numargs
== 1)
2486 args
[nargs
- 1] = XCAR (spread_arg
);
2487 return Ffuncall (nargs
, args
);
2490 numargs
+= nargs
- 2;
2492 /* Optimize for no indirection. */
2493 if (SYMBOLP (fun
) && !EQ (fun
, Qunbound
)
2494 && (fun
= XSYMBOL (fun
)->function
, SYMBOLP (fun
)))
2495 fun
= indirect_function (fun
);
2496 if (EQ (fun
, Qunbound
))
2498 /* Let funcall get the error. */
2505 if (numargs
< XSUBR (fun
)->min_args
2506 || (XSUBR (fun
)->max_args
>= 0 && XSUBR (fun
)->max_args
< numargs
))
2507 goto funcall
; /* Let funcall get the error. */
2508 else if (XSUBR (fun
)->max_args
>= 0 && XSUBR (fun
)->max_args
> numargs
)
2510 /* Avoid making funcall cons up a yet another new vector of arguments
2511 by explicitly supplying nil's for optional values. */
2512 SAFE_ALLOCA_LISP (funcall_args
, 1 + XSUBR (fun
)->max_args
);
2513 for (i
= numargs
; i
< XSUBR (fun
)->max_args
;)
2514 funcall_args
[++i
] = Qnil
;
2515 GCPRO1 (*funcall_args
);
2516 gcpro1
.nvars
= 1 + XSUBR (fun
)->max_args
;
2520 /* We add 1 to numargs because funcall_args includes the
2521 function itself as well as its arguments. */
2524 SAFE_ALLOCA_LISP (funcall_args
, 1 + numargs
);
2525 GCPRO1 (*funcall_args
);
2526 gcpro1
.nvars
= 1 + numargs
;
2529 memcpy (funcall_args
, args
, nargs
* sizeof (Lisp_Object
));
2530 /* Spread the last arg we got. Its first element goes in
2531 the slot that it used to occupy, hence this value of I. */
2533 while (!NILP (spread_arg
))
2535 funcall_args
[i
++] = XCAR (spread_arg
);
2536 spread_arg
= XCDR (spread_arg
);
2539 /* By convention, the caller needs to gcpro Ffuncall's args. */
2540 retval
= Ffuncall (gcpro1
.nvars
, funcall_args
);
2547 /* Run hook variables in various ways. */
2550 funcall_nil (size_t nargs
, Lisp_Object
*args
)
2552 Ffuncall (nargs
, args
);
2556 DEFUN ("run-hooks", Frun_hooks
, Srun_hooks
, 0, MANY
, 0,
2557 doc
: /* Run each hook in HOOKS.
2558 Each argument should be a symbol, a hook variable.
2559 These symbols are processed in the order specified.
2560 If a hook symbol has a non-nil value, that value may be a function
2561 or a list of functions to be called to run the hook.
2562 If the value is a function, it is called with no arguments.
2563 If it is a list, the elements are called, in order, with no arguments.
2565 Major modes should not use this function directly to run their mode
2566 hook; they should use `run-mode-hooks' instead.
2568 Do not use `make-local-variable' to make a hook variable buffer-local.
2569 Instead, use `add-hook' and specify t for the LOCAL argument.
2570 usage: (run-hooks &rest HOOKS) */)
2571 (size_t nargs
, Lisp_Object
*args
)
2573 Lisp_Object hook
[1];
2576 for (i
= 0; i
< nargs
; i
++)
2579 run_hook_with_args (1, hook
, funcall_nil
);
2585 DEFUN ("run-hook-with-args", Frun_hook_with_args
,
2586 Srun_hook_with_args
, 1, MANY
, 0,
2587 doc
: /* Run HOOK with the specified arguments ARGS.
2588 HOOK should be a symbol, a hook variable. If HOOK has a non-nil
2589 value, that value may be a function or a list of functions to be
2590 called to run the hook. If the value is a function, it is called with
2591 the given arguments and its return value is returned. If it is a list
2592 of functions, those functions are called, in order,
2593 with the given arguments ARGS.
2594 It is best not to depend on the value returned by `run-hook-with-args',
2597 Do not use `make-local-variable' to make a hook variable buffer-local.
2598 Instead, use `add-hook' and specify t for the LOCAL argument.
2599 usage: (run-hook-with-args HOOK &rest ARGS) */)
2600 (size_t nargs
, Lisp_Object
*args
)
2602 return run_hook_with_args (nargs
, args
, funcall_nil
);
2605 DEFUN ("run-hook-with-args-until-success", Frun_hook_with_args_until_success
,
2606 Srun_hook_with_args_until_success
, 1, MANY
, 0,
2607 doc
: /* Run HOOK with the specified arguments ARGS.
2608 HOOK should be a symbol, a hook variable. If HOOK has a non-nil
2609 value, that value may be a function or a list of functions to be
2610 called to run the hook. If the value is a function, it is called with
2611 the given arguments and its return value is returned.
2612 If it is a list of functions, those functions are called, in order,
2613 with the given arguments ARGS, until one of them
2614 returns a non-nil value. Then we return that value.
2615 However, if they all return nil, we return nil.
2617 Do not use `make-local-variable' to make a hook variable buffer-local.
2618 Instead, use `add-hook' and specify t for the LOCAL argument.
2619 usage: (run-hook-with-args-until-success HOOK &rest ARGS) */)
2620 (size_t nargs
, Lisp_Object
*args
)
2622 return run_hook_with_args (nargs
, args
, Ffuncall
);
2626 funcall_not (size_t nargs
, Lisp_Object
*args
)
2628 return NILP (Ffuncall (nargs
, args
)) ? Qt
: Qnil
;
2631 DEFUN ("run-hook-with-args-until-failure", Frun_hook_with_args_until_failure
,
2632 Srun_hook_with_args_until_failure
, 1, MANY
, 0,
2633 doc
: /* Run HOOK with the specified arguments ARGS.
2634 HOOK should be a symbol, a hook variable. If HOOK has a non-nil
2635 value, that value may be a function or a list of functions to be
2636 called to run the hook. If the value is a function, it is called with
2637 the given arguments and its return value is returned.
2638 If it is a list of functions, those functions are called, in order,
2639 with the given arguments ARGS, until one of them returns nil.
2640 Then we return nil. However, if they all return non-nil, we return non-nil.
2642 Do not use `make-local-variable' to make a hook variable buffer-local.
2643 Instead, use `add-hook' and specify t for the LOCAL argument.
2644 usage: (run-hook-with-args-until-failure HOOK &rest ARGS) */)
2645 (size_t nargs
, Lisp_Object
*args
)
2647 return NILP (run_hook_with_args (nargs
, args
, funcall_not
)) ? Qt
: Qnil
;
2651 run_hook_wrapped_funcall (size_t nargs
, Lisp_Object
*args
)
2653 Lisp_Object tmp
= args
[0], ret
;
2656 ret
= Ffuncall (nargs
, args
);
2662 DEFUN ("run-hook-wrapped", Frun_hook_wrapped
, Srun_hook_wrapped
, 2, MANY
, 0,
2663 doc
: /* Run HOOK, passing each function through WRAP-FUNCTION.
2664 I.e. instead of calling each function FUN directly with arguments ARGS,
2665 it calls WRAP-FUNCTION with arguments FUN and ARGS.
2666 As soon as a call to WRAP-FUNCTION returns non-nil, `run-hook-wrapped'
2667 aborts and returns that value.
2668 usage: (run-hook-wrapped HOOK WRAP-FUNCTION &rest ARGS) */)
2669 (size_t nargs
, Lisp_Object
*args
)
2671 return run_hook_with_args (nargs
, args
, run_hook_wrapped_funcall
);
2674 /* ARGS[0] should be a hook symbol.
2675 Call each of the functions in the hook value, passing each of them
2676 as arguments all the rest of ARGS (all NARGS - 1 elements).
2677 FUNCALL specifies how to call each function on the hook.
2678 The caller (or its caller, etc) must gcpro all of ARGS,
2679 except that it isn't necessary to gcpro ARGS[0]. */
2682 run_hook_with_args (size_t nargs
, Lisp_Object
*args
,
2683 Lisp_Object (*funcall
) (size_t nargs
, Lisp_Object
*args
))
2685 Lisp_Object sym
, val
, ret
= Qnil
;
2686 struct gcpro gcpro1
, gcpro2
, gcpro3
;
2688 /* If we are dying or still initializing,
2689 don't do anything--it would probably crash if we tried. */
2690 if (NILP (Vrun_hooks
))
2694 val
= find_symbol_value (sym
);
2696 if (EQ (val
, Qunbound
) || NILP (val
))
2698 else if (!CONSP (val
) || EQ (XCAR (val
), Qlambda
))
2701 return funcall (nargs
, args
);
2705 Lisp_Object global_vals
= Qnil
;
2706 GCPRO3 (sym
, val
, global_vals
);
2709 CONSP (val
) && NILP (ret
);
2712 if (EQ (XCAR (val
), Qt
))
2714 /* t indicates this hook has a local binding;
2715 it means to run the global binding too. */
2716 global_vals
= Fdefault_value (sym
);
2717 if (NILP (global_vals
)) continue;
2719 if (!CONSP (global_vals
) || EQ (XCAR (global_vals
), Qlambda
))
2721 args
[0] = global_vals
;
2722 ret
= funcall (nargs
, args
);
2727 CONSP (global_vals
) && NILP (ret
);
2728 global_vals
= XCDR (global_vals
))
2730 args
[0] = XCAR (global_vals
);
2731 /* In a global value, t should not occur. If it does, we
2732 must ignore it to avoid an endless loop. */
2733 if (!EQ (args
[0], Qt
))
2734 ret
= funcall (nargs
, args
);
2740 args
[0] = XCAR (val
);
2741 ret
= funcall (nargs
, args
);
2750 /* Run the hook HOOK, giving each function the two args ARG1 and ARG2. */
2753 run_hook_with_args_2 (Lisp_Object hook
, Lisp_Object arg1
, Lisp_Object arg2
)
2755 Lisp_Object temp
[3];
2760 Frun_hook_with_args (3, temp
);
2763 /* Apply fn to arg. */
2765 apply1 (Lisp_Object fn
, Lisp_Object arg
)
2767 struct gcpro gcpro1
;
2771 RETURN_UNGCPRO (Ffuncall (1, &fn
));
2774 Lisp_Object args
[2];
2778 RETURN_UNGCPRO (Fapply (2, args
));
2782 /* Call function fn on no arguments. */
2784 call0 (Lisp_Object fn
)
2786 struct gcpro gcpro1
;
2789 RETURN_UNGCPRO (Ffuncall (1, &fn
));
2792 /* Call function fn with 1 argument arg1. */
2795 call1 (Lisp_Object fn
, Lisp_Object arg1
)
2797 struct gcpro gcpro1
;
2798 Lisp_Object args
[2];
2804 RETURN_UNGCPRO (Ffuncall (2, args
));
2807 /* Call function fn with 2 arguments arg1, arg2. */
2810 call2 (Lisp_Object fn
, Lisp_Object arg1
, Lisp_Object arg2
)
2812 struct gcpro gcpro1
;
2813 Lisp_Object args
[3];
2819 RETURN_UNGCPRO (Ffuncall (3, args
));
2822 /* Call function fn with 3 arguments arg1, arg2, arg3. */
2825 call3 (Lisp_Object fn
, Lisp_Object arg1
, Lisp_Object arg2
, Lisp_Object arg3
)
2827 struct gcpro gcpro1
;
2828 Lisp_Object args
[4];
2835 RETURN_UNGCPRO (Ffuncall (4, args
));
2838 /* Call function fn with 4 arguments arg1, arg2, arg3, arg4. */
2841 call4 (Lisp_Object fn
, Lisp_Object arg1
, Lisp_Object arg2
, Lisp_Object arg3
,
2844 struct gcpro gcpro1
;
2845 Lisp_Object args
[5];
2853 RETURN_UNGCPRO (Ffuncall (5, args
));
2856 /* Call function fn with 5 arguments arg1, arg2, arg3, arg4, arg5. */
2859 call5 (Lisp_Object fn
, Lisp_Object arg1
, Lisp_Object arg2
, Lisp_Object arg3
,
2860 Lisp_Object arg4
, Lisp_Object arg5
)
2862 struct gcpro gcpro1
;
2863 Lisp_Object args
[6];
2872 RETURN_UNGCPRO (Ffuncall (6, args
));
2875 /* Call function fn with 6 arguments arg1, arg2, arg3, arg4, arg5, arg6. */
2878 call6 (Lisp_Object fn
, Lisp_Object arg1
, Lisp_Object arg2
, Lisp_Object arg3
,
2879 Lisp_Object arg4
, Lisp_Object arg5
, Lisp_Object arg6
)
2881 struct gcpro gcpro1
;
2882 Lisp_Object args
[7];
2892 RETURN_UNGCPRO (Ffuncall (7, args
));
2895 /* Call function fn with 7 arguments arg1, arg2, arg3, arg4, arg5, arg6, arg7. */
2898 call7 (Lisp_Object fn
, Lisp_Object arg1
, Lisp_Object arg2
, Lisp_Object arg3
,
2899 Lisp_Object arg4
, Lisp_Object arg5
, Lisp_Object arg6
, Lisp_Object arg7
)
2901 struct gcpro gcpro1
;
2902 Lisp_Object args
[8];
2913 RETURN_UNGCPRO (Ffuncall (8, args
));
2916 /* The caller should GCPRO all the elements of ARGS. */
2918 DEFUN ("functionp", Ffunctionp
, Sfunctionp
, 1, 1, 0,
2919 doc
: /* Non-nil if OBJECT is a function. */)
2920 (Lisp_Object object
)
2922 if (SYMBOLP (object
) && !NILP (Ffboundp (object
)))
2924 object
= Findirect_function (object
, Qt
);
2926 if (CONSP (object
) && EQ (XCAR (object
), Qautoload
))
2928 /* Autoloaded symbols are functions, except if they load
2929 macros or keymaps. */
2931 for (i
= 0; i
< 4 && CONSP (object
); i
++)
2932 object
= XCDR (object
);
2934 return (CONSP (object
) && !NILP (XCAR (object
))) ? Qnil
: Qt
;
2939 return (XSUBR (object
)->max_args
!= UNEVALLED
) ? Qt
: Qnil
;
2940 else if (COMPILEDP (object
))
2942 else if (CONSP (object
))
2944 Lisp_Object car
= XCAR (object
);
2945 return (EQ (car
, Qlambda
) || EQ (car
, Qclosure
)) ? Qt
: Qnil
;
2951 DEFUN ("funcall", Ffuncall
, Sfuncall
, 1, MANY
, 0,
2952 doc
: /* Call first argument as a function, passing remaining arguments to it.
2953 Return the value that function returns.
2954 Thus, (funcall 'cons 'x 'y) returns (x . y).
2955 usage: (funcall FUNCTION &rest ARGUMENTS) */)
2956 (size_t nargs
, Lisp_Object
*args
)
2958 Lisp_Object fun
, original_fun
;
2960 size_t numargs
= nargs
- 1;
2961 Lisp_Object lisp_numargs
;
2963 struct backtrace backtrace
;
2964 register Lisp_Object
*internal_args
;
2968 if ((consing_since_gc
> gc_cons_threshold
2969 && consing_since_gc
> gc_relative_threshold
)
2971 (!NILP (Vmemory_full
) && consing_since_gc
> memory_full_cons_threshold
))
2972 Fgarbage_collect ();
2974 if (++lisp_eval_depth
> max_lisp_eval_depth
)
2976 if (max_lisp_eval_depth
< 100)
2977 max_lisp_eval_depth
= 100;
2978 if (lisp_eval_depth
> max_lisp_eval_depth
)
2979 error ("Lisp nesting exceeds `max-lisp-eval-depth'");
2982 backtrace
.next
= backtrace_list
;
2983 backtrace_list
= &backtrace
;
2984 backtrace
.function
= &args
[0];
2985 backtrace
.args
= &args
[1];
2986 backtrace
.nargs
= nargs
- 1;
2987 backtrace
.evalargs
= 0;
2988 backtrace
.debug_on_exit
= 0;
2990 if (debug_on_next_call
)
2991 do_debug_on_call (Qlambda
);
2995 original_fun
= args
[0];
2999 /* Optimize for no indirection. */
3001 if (SYMBOLP (fun
) && !EQ (fun
, Qunbound
)
3002 && (fun
= XSYMBOL (fun
)->function
, SYMBOLP (fun
)))
3003 fun
= indirect_function (fun
);
3007 if (numargs
< XSUBR (fun
)->min_args
3008 || (XSUBR (fun
)->max_args
>= 0 && XSUBR (fun
)->max_args
< numargs
))
3010 XSETFASTINT (lisp_numargs
, numargs
);
3011 xsignal2 (Qwrong_number_of_arguments
, original_fun
, lisp_numargs
);
3014 else if (XSUBR (fun
)->max_args
== UNEVALLED
)
3015 xsignal1 (Qinvalid_function
, original_fun
);
3017 else if (XSUBR (fun
)->max_args
== MANY
)
3018 val
= (XSUBR (fun
)->function
.aMANY
) (numargs
, args
+ 1);
3021 if (XSUBR (fun
)->max_args
> numargs
)
3023 internal_args
= (Lisp_Object
*) alloca (XSUBR (fun
)->max_args
* sizeof (Lisp_Object
));
3024 memcpy (internal_args
, args
+ 1, numargs
* sizeof (Lisp_Object
));
3025 for (i
= numargs
; i
< XSUBR (fun
)->max_args
; i
++)
3026 internal_args
[i
] = Qnil
;
3029 internal_args
= args
+ 1;
3030 switch (XSUBR (fun
)->max_args
)
3033 val
= (XSUBR (fun
)->function
.a0 ());
3036 val
= (XSUBR (fun
)->function
.a1 (internal_args
[0]));
3039 val
= (XSUBR (fun
)->function
.a2
3040 (internal_args
[0], internal_args
[1]));
3043 val
= (XSUBR (fun
)->function
.a3
3044 (internal_args
[0], internal_args
[1], internal_args
[2]));
3047 val
= (XSUBR (fun
)->function
.a4
3048 (internal_args
[0], internal_args
[1], internal_args
[2],
3052 val
= (XSUBR (fun
)->function
.a5
3053 (internal_args
[0], internal_args
[1], internal_args
[2],
3054 internal_args
[3], internal_args
[4]));
3057 val
= (XSUBR (fun
)->function
.a6
3058 (internal_args
[0], internal_args
[1], internal_args
[2],
3059 internal_args
[3], internal_args
[4], internal_args
[5]));
3062 val
= (XSUBR (fun
)->function
.a7
3063 (internal_args
[0], internal_args
[1], internal_args
[2],
3064 internal_args
[3], internal_args
[4], internal_args
[5],
3069 val
= (XSUBR (fun
)->function
.a8
3070 (internal_args
[0], internal_args
[1], internal_args
[2],
3071 internal_args
[3], internal_args
[4], internal_args
[5],
3072 internal_args
[6], internal_args
[7]));
3077 /* If a subr takes more than 8 arguments without using MANY
3078 or UNEVALLED, we need to extend this function to support it.
3079 Until this is done, there is no way to call the function. */
3084 else if (COMPILEDP (fun
))
3085 val
= funcall_lambda (fun
, numargs
, args
+ 1);
3088 if (EQ (fun
, Qunbound
))
3089 xsignal1 (Qvoid_function
, original_fun
);
3091 xsignal1 (Qinvalid_function
, original_fun
);
3092 funcar
= XCAR (fun
);
3093 if (!SYMBOLP (funcar
))
3094 xsignal1 (Qinvalid_function
, original_fun
);
3095 if (EQ (funcar
, Qlambda
)
3096 || EQ (funcar
, Qclosure
))
3097 val
= funcall_lambda (fun
, numargs
, args
+ 1);
3098 else if (EQ (funcar
, Qautoload
))
3100 do_autoload (fun
, original_fun
);
3105 xsignal1 (Qinvalid_function
, original_fun
);
3109 if (backtrace
.debug_on_exit
)
3110 val
= call_debugger (Fcons (Qexit
, Fcons (val
, Qnil
)));
3111 backtrace_list
= backtrace
.next
;
3116 apply_lambda (Lisp_Object fun
, Lisp_Object args
)
3118 Lisp_Object args_left
;
3120 register Lisp_Object
*arg_vector
;
3121 struct gcpro gcpro1
, gcpro2
, gcpro3
;
3123 register Lisp_Object tem
;
3126 numargs
= XINT (Flength (args
));
3127 SAFE_ALLOCA_LISP (arg_vector
, numargs
);
3130 GCPRO3 (*arg_vector
, args_left
, fun
);
3133 for (i
= 0; i
< numargs
; )
3135 tem
= Fcar (args_left
), args_left
= Fcdr (args_left
);
3136 tem
= eval_sub (tem
);
3137 arg_vector
[i
++] = tem
;
3143 backtrace_list
->args
= arg_vector
;
3144 backtrace_list
->nargs
= i
;
3145 backtrace_list
->evalargs
= 0;
3146 tem
= funcall_lambda (fun
, numargs
, arg_vector
);
3148 /* Do the debug-on-exit now, while arg_vector still exists. */
3149 if (backtrace_list
->debug_on_exit
)
3150 tem
= call_debugger (Fcons (Qexit
, Fcons (tem
, Qnil
)));
3151 /* Don't do it again when we return to eval. */
3152 backtrace_list
->debug_on_exit
= 0;
3157 /* Apply a Lisp function FUN to the NARGS evaluated arguments in ARG_VECTOR
3158 and return the result of evaluation.
3159 FUN must be either a lambda-expression or a compiled-code object. */
3162 funcall_lambda (Lisp_Object fun
, size_t nargs
,
3163 register Lisp_Object
*arg_vector
)
3165 Lisp_Object val
, syms_left
, next
, lexenv
;
3166 int count
= SPECPDL_INDEX ();
3172 if (EQ (XCAR (fun
), Qclosure
))
3174 fun
= XCDR (fun
); /* Drop `closure'. */
3175 lexenv
= XCAR (fun
);
3176 CHECK_LIST_CONS (fun
, fun
);
3180 syms_left
= XCDR (fun
);
3181 if (CONSP (syms_left
))
3182 syms_left
= XCAR (syms_left
);
3184 xsignal1 (Qinvalid_function
, fun
);
3186 else if (COMPILEDP (fun
))
3188 syms_left
= AREF (fun
, COMPILED_ARGLIST
);
3189 if (INTEGERP (syms_left
))
3190 /* A byte-code object with a non-nil `push args' slot means we
3191 shouldn't bind any arguments, instead just call the byte-code
3192 interpreter directly; it will push arguments as necessary.
3194 Byte-code objects with either a non-existant, or a nil value for
3195 the `push args' slot (the default), have dynamically-bound
3196 arguments, and use the argument-binding code below instead (as do
3197 all interpreted functions, even lexically bound ones). */
3199 /* If we have not actually read the bytecode string
3200 and constants vector yet, fetch them from the file. */
3201 if (CONSP (AREF (fun
, COMPILED_BYTECODE
)))
3202 Ffetch_bytecode (fun
);
3203 return exec_byte_code (AREF (fun
, COMPILED_BYTECODE
),
3204 AREF (fun
, COMPILED_CONSTANTS
),
3205 AREF (fun
, COMPILED_STACK_DEPTH
),
3214 i
= optional
= rest
= 0;
3215 for (; CONSP (syms_left
); syms_left
= XCDR (syms_left
))
3219 next
= XCAR (syms_left
);
3220 if (!SYMBOLP (next
))
3221 xsignal1 (Qinvalid_function
, fun
);
3223 if (EQ (next
, Qand_rest
))
3225 else if (EQ (next
, Qand_optional
))
3232 arg
= Flist (nargs
- i
, &arg_vector
[i
]);
3236 arg
= arg_vector
[i
++];
3238 xsignal2 (Qwrong_number_of_arguments
, fun
, make_number (nargs
));
3242 /* Bind the argument. */
3243 if (!NILP (lexenv
) && SYMBOLP (next
))
3244 /* Lexically bind NEXT by adding it to the lexenv alist. */
3245 lexenv
= Fcons (Fcons (next
, arg
), lexenv
);
3247 /* Dynamically bind NEXT. */
3248 specbind (next
, arg
);
3252 if (!NILP (syms_left
))
3253 xsignal1 (Qinvalid_function
, fun
);
3255 xsignal2 (Qwrong_number_of_arguments
, fun
, make_number (nargs
));
3257 if (!EQ (lexenv
, Vinternal_interpreter_environment
))
3258 /* Instantiate a new lexical environment. */
3259 specbind (Qinternal_interpreter_environment
, lexenv
);
3262 val
= Fprogn (XCDR (XCDR (fun
)));
3265 /* If we have not actually read the bytecode string
3266 and constants vector yet, fetch them from the file. */
3267 if (CONSP (AREF (fun
, COMPILED_BYTECODE
)))
3268 Ffetch_bytecode (fun
);
3269 val
= exec_byte_code (AREF (fun
, COMPILED_BYTECODE
),
3270 AREF (fun
, COMPILED_CONSTANTS
),
3271 AREF (fun
, COMPILED_STACK_DEPTH
),
3275 return unbind_to (count
, val
);
3278 DEFUN ("fetch-bytecode", Ffetch_bytecode
, Sfetch_bytecode
,
3280 doc
: /* If byte-compiled OBJECT is lazy-loaded, fetch it now. */)
3281 (Lisp_Object object
)
3285 if (COMPILEDP (object
) && CONSP (AREF (object
, COMPILED_BYTECODE
)))
3287 tem
= read_doc_string (AREF (object
, COMPILED_BYTECODE
));
3290 tem
= AREF (object
, COMPILED_BYTECODE
);
3291 if (CONSP (tem
) && STRINGP (XCAR (tem
)))
3292 error ("Invalid byte code in %s", SDATA (XCAR (tem
)));
3294 error ("Invalid byte code");
3296 ASET (object
, COMPILED_BYTECODE
, XCAR (tem
));
3297 ASET (object
, COMPILED_CONSTANTS
, XCDR (tem
));
3305 register int count
= SPECPDL_INDEX ();
3306 if (specpdl_size
>= max_specpdl_size
)
3308 if (max_specpdl_size
< 400)
3309 max_specpdl_size
= 400;
3310 if (specpdl_size
>= max_specpdl_size
)
3311 signal_error ("Variable binding depth exceeds max-specpdl-size", Qnil
);
3314 if (specpdl_size
> max_specpdl_size
)
3315 specpdl_size
= max_specpdl_size
;
3316 specpdl
= (struct specbinding
*) xrealloc (specpdl
, specpdl_size
* sizeof (struct specbinding
));
3317 specpdl_ptr
= specpdl
+ count
;
3320 /* `specpdl_ptr->symbol' is a field which describes which variable is
3321 let-bound, so it can be properly undone when we unbind_to.
3322 It can have the following two shapes:
3323 - SYMBOL : if it's a plain symbol, it means that we have let-bound
3324 a symbol that is not buffer-local (at least at the time
3325 the let binding started). Note also that it should not be
3326 aliased (i.e. when let-binding V1 that's aliased to V2, we want
3328 - (SYMBOL WHERE . BUFFER) : this means that it is a let-binding for
3329 variable SYMBOL which can be buffer-local. WHERE tells us
3330 which buffer is affected (or nil if the let-binding affects the
3331 global value of the variable) and BUFFER tells us which buffer was
3332 current (i.e. if WHERE is non-nil, then BUFFER==WHERE, otherwise
3333 BUFFER did not yet have a buffer-local value). */
3336 specbind (Lisp_Object symbol
, Lisp_Object value
)
3338 struct Lisp_Symbol
*sym
;
3340 eassert (!handling_signal
);
3342 CHECK_SYMBOL (symbol
);
3343 sym
= XSYMBOL (symbol
);
3344 if (specpdl_ptr
== specpdl
+ specpdl_size
)
3348 switch (sym
->redirect
)
3350 case SYMBOL_VARALIAS
:
3351 sym
= indirect_variable (sym
); XSETSYMBOL (symbol
, sym
); goto start
;
3352 case SYMBOL_PLAINVAL
:
3353 /* The most common case is that of a non-constant symbol with a
3354 trivial value. Make that as fast as we can. */
3355 specpdl_ptr
->symbol
= symbol
;
3356 specpdl_ptr
->old_value
= SYMBOL_VAL (sym
);
3357 specpdl_ptr
->func
= NULL
;
3360 SET_SYMBOL_VAL (sym
, value
);
3362 set_internal (symbol
, value
, Qnil
, 1);
3364 case SYMBOL_LOCALIZED
:
3365 if (SYMBOL_BLV (sym
)->frame_local
)
3366 error ("Frame-local vars cannot be let-bound");
3367 case SYMBOL_FORWARDED
:
3369 Lisp_Object ovalue
= find_symbol_value (symbol
);
3370 specpdl_ptr
->func
= 0;
3371 specpdl_ptr
->old_value
= ovalue
;
3373 eassert (sym
->redirect
!= SYMBOL_LOCALIZED
3374 || (EQ (SYMBOL_BLV (sym
)->where
,
3375 SYMBOL_BLV (sym
)->frame_local
?
3376 Fselected_frame () : Fcurrent_buffer ())));
3378 if (sym
->redirect
== SYMBOL_LOCALIZED
3379 || BUFFER_OBJFWDP (SYMBOL_FWD (sym
)))
3381 Lisp_Object where
, cur_buf
= Fcurrent_buffer ();
3383 /* For a local variable, record both the symbol and which
3384 buffer's or frame's value we are saving. */
3385 if (!NILP (Flocal_variable_p (symbol
, Qnil
)))
3387 eassert (sym
->redirect
!= SYMBOL_LOCALIZED
3388 || (BLV_FOUND (SYMBOL_BLV (sym
))
3389 && EQ (cur_buf
, SYMBOL_BLV (sym
)->where
)));
3392 else if (sym
->redirect
== SYMBOL_LOCALIZED
3393 && BLV_FOUND (SYMBOL_BLV (sym
)))
3394 where
= SYMBOL_BLV (sym
)->where
;
3398 /* We're not using the `unused' slot in the specbinding
3399 structure because this would mean we have to do more
3400 work for simple variables. */
3401 /* FIXME: The third value `current_buffer' is only used in
3402 let_shadows_buffer_binding_p which is itself only used
3403 in set_internal for local_if_set. */
3404 eassert (NILP (where
) || EQ (where
, cur_buf
));
3405 specpdl_ptr
->symbol
= Fcons (symbol
, Fcons (where
, cur_buf
));
3407 /* If SYMBOL is a per-buffer variable which doesn't have a
3408 buffer-local value here, make the `let' change the global
3409 value by changing the value of SYMBOL in all buffers not
3410 having their own value. This is consistent with what
3411 happens with other buffer-local variables. */
3413 && sym
->redirect
== SYMBOL_FORWARDED
)
3415 eassert (BUFFER_OBJFWDP (SYMBOL_FWD (sym
)));
3417 Fset_default (symbol
, value
);
3422 specpdl_ptr
->symbol
= symbol
;
3425 set_internal (symbol
, value
, Qnil
, 1);
3433 record_unwind_protect (Lisp_Object (*function
) (Lisp_Object
), Lisp_Object arg
)
3435 eassert (!handling_signal
);
3437 if (specpdl_ptr
== specpdl
+ specpdl_size
)
3439 specpdl_ptr
->func
= function
;
3440 specpdl_ptr
->symbol
= Qnil
;
3441 specpdl_ptr
->old_value
= arg
;
3446 unbind_to (int count
, Lisp_Object value
)
3448 Lisp_Object quitf
= Vquit_flag
;
3449 struct gcpro gcpro1
, gcpro2
;
3451 GCPRO2 (value
, quitf
);
3454 while (specpdl_ptr
!= specpdl
+ count
)
3456 /* Copy the binding, and decrement specpdl_ptr, before we do
3457 the work to unbind it. We decrement first
3458 so that an error in unbinding won't try to unbind
3459 the same entry again, and we copy the binding first
3460 in case more bindings are made during some of the code we run. */
3462 struct specbinding this_binding
;
3463 this_binding
= *--specpdl_ptr
;
3465 if (this_binding
.func
!= 0)
3466 (*this_binding
.func
) (this_binding
.old_value
);
3467 /* If the symbol is a list, it is really (SYMBOL WHERE
3468 . CURRENT-BUFFER) where WHERE is either nil, a buffer, or a
3469 frame. If WHERE is a buffer or frame, this indicates we
3470 bound a variable that had a buffer-local or frame-local
3471 binding. WHERE nil means that the variable had the default
3472 value when it was bound. CURRENT-BUFFER is the buffer that
3473 was current when the variable was bound. */
3474 else if (CONSP (this_binding
.symbol
))
3476 Lisp_Object symbol
, where
;
3478 symbol
= XCAR (this_binding
.symbol
);
3479 where
= XCAR (XCDR (this_binding
.symbol
));
3482 Fset_default (symbol
, this_binding
.old_value
);
3483 /* If `where' is non-nil, reset the value in the appropriate
3484 local binding, but only if that binding still exists. */
3485 else if (BUFFERP (where
)
3486 ? !NILP (Flocal_variable_p (symbol
, where
))
3487 : !NILP (Fassq (symbol
, XFRAME (where
)->param_alist
)))
3488 set_internal (symbol
, this_binding
.old_value
, where
, 1);
3490 /* If variable has a trivial value (no forwarding), we can
3491 just set it. No need to check for constant symbols here,
3492 since that was already done by specbind. */
3493 else if (XSYMBOL (this_binding
.symbol
)->redirect
== SYMBOL_PLAINVAL
)
3494 SET_SYMBOL_VAL (XSYMBOL (this_binding
.symbol
),
3495 this_binding
.old_value
);
3497 /* NOTE: we only ever come here if make_local_foo was used for
3498 the first time on this var within this let. */
3499 Fset_default (this_binding
.symbol
, this_binding
.old_value
);
3502 if (NILP (Vquit_flag
) && !NILP (quitf
))
3509 DEFUN ("special-variable-p", Fspecial_variable_p
, Sspecial_variable_p
, 1, 1, 0,
3510 doc
: /* Return non-nil if SYMBOL's global binding has been declared special.
3511 A special variable is one that will be bound dynamically, even in a
3512 context where binding is lexical by default. */)
3513 (Lisp_Object symbol
)
3515 CHECK_SYMBOL (symbol
);
3516 return XSYMBOL (symbol
)->declared_special
? Qt
: Qnil
;
3520 DEFUN ("backtrace-debug", Fbacktrace_debug
, Sbacktrace_debug
, 2, 2, 0,
3521 doc
: /* Set the debug-on-exit flag of eval frame LEVEL levels down to FLAG.
3522 The debugger is entered when that frame exits, if the flag is non-nil. */)
3523 (Lisp_Object level
, Lisp_Object flag
)
3525 register struct backtrace
*backlist
= backtrace_list
;
3528 CHECK_NUMBER (level
);
3530 for (i
= 0; backlist
&& i
< XINT (level
); i
++)
3532 backlist
= backlist
->next
;
3536 backlist
->debug_on_exit
= !NILP (flag
);
3541 DEFUN ("backtrace", Fbacktrace
, Sbacktrace
, 0, 0, "",
3542 doc
: /* Print a trace of Lisp function calls currently active.
3543 Output stream used is value of `standard-output'. */)
3546 register struct backtrace
*backlist
= backtrace_list
;
3549 struct gcpro gcpro1
;
3550 Lisp_Object old_print_level
= Vprint_level
;
3552 if (NILP (Vprint_level
))
3553 XSETFASTINT (Vprint_level
, 8);
3560 write_string (backlist
->debug_on_exit
? "* " : " ", 2);
3561 if (backlist
->nargs
== UNEVALLED
)
3563 Fprin1 (Fcons (*backlist
->function
, *backlist
->args
), Qnil
);
3564 write_string ("\n", -1);
3568 tem
= *backlist
->function
;
3569 Fprin1 (tem
, Qnil
); /* This can QUIT. */
3570 write_string ("(", -1);
3571 if (backlist
->nargs
== MANY
)
3572 { /* FIXME: Can this happen? */
3574 for (tail
= *backlist
->args
, i
= 0;
3576 tail
= Fcdr (tail
), i
= 1)
3578 if (i
) write_string (" ", -1);
3579 Fprin1 (Fcar (tail
), Qnil
);
3585 for (i
= 0; i
< backlist
->nargs
; i
++)
3587 if (i
) write_string (" ", -1);
3588 Fprin1 (backlist
->args
[i
], Qnil
);
3591 write_string (")\n", -1);
3593 backlist
= backlist
->next
;
3596 Vprint_level
= old_print_level
;
3601 DEFUN ("backtrace-frame", Fbacktrace_frame
, Sbacktrace_frame
, 1, 1, NULL
,
3602 doc
: /* Return the function and arguments NFRAMES up from current execution point.
3603 If that frame has not evaluated the arguments yet (or is a special form),
3604 the value is (nil FUNCTION ARG-FORMS...).
3605 If that frame has evaluated its arguments and called its function already,
3606 the value is (t FUNCTION ARG-VALUES...).
3607 A &rest arg is represented as the tail of the list ARG-VALUES.
3608 FUNCTION is whatever was supplied as car of evaluated list,
3609 or a lambda expression for macro calls.
3610 If NFRAMES is more than the number of frames, the value is nil. */)
3611 (Lisp_Object nframes
)
3613 register struct backtrace
*backlist
= backtrace_list
;
3614 register EMACS_INT i
;
3617 CHECK_NATNUM (nframes
);
3619 /* Find the frame requested. */
3620 for (i
= 0; backlist
&& i
< XFASTINT (nframes
); i
++)
3621 backlist
= backlist
->next
;
3625 if (backlist
->nargs
== UNEVALLED
)
3626 return Fcons (Qnil
, Fcons (*backlist
->function
, *backlist
->args
));
3629 if (backlist
->nargs
== MANY
) /* FIXME: Can this happen? */
3630 tem
= *backlist
->args
;
3632 tem
= Flist (backlist
->nargs
, backlist
->args
);
3634 return Fcons (Qt
, Fcons (*backlist
->function
, tem
));
3641 mark_backtrace (void)
3643 register struct backtrace
*backlist
;
3646 for (backlist
= backtrace_list
; backlist
; backlist
= backlist
->next
)
3648 mark_object (*backlist
->function
);
3650 if (backlist
->nargs
== UNEVALLED
3651 || backlist
->nargs
== MANY
) /* FIXME: Can this happen? */
3654 i
= backlist
->nargs
;
3656 mark_object (backlist
->args
[i
]);
3664 DEFVAR_INT ("max-specpdl-size", max_specpdl_size
,
3665 doc
: /* *Limit on number of Lisp variable bindings and `unwind-protect's.
3666 If Lisp code tries to increase the total number past this amount,
3667 an error is signaled.
3668 You can safely use a value considerably larger than the default value,
3669 if that proves inconveniently small. However, if you increase it too far,
3670 Emacs could run out of memory trying to make the stack bigger. */);
3672 DEFVAR_INT ("max-lisp-eval-depth", max_lisp_eval_depth
,
3673 doc
: /* *Limit on depth in `eval', `apply' and `funcall' before error.
3675 This limit serves to catch infinite recursions for you before they cause
3676 actual stack overflow in C, which would be fatal for Emacs.
3677 You can safely make it considerably larger than its default value,
3678 if that proves inconveniently small. However, if you increase it too far,
3679 Emacs could overflow the real C stack, and crash. */);
3681 DEFVAR_LISP ("quit-flag", Vquit_flag
,
3682 doc
: /* Non-nil causes `eval' to abort, unless `inhibit-quit' is non-nil.
3683 If the value is t, that means do an ordinary quit.
3684 If the value equals `throw-on-input', that means quit by throwing
3685 to the tag specified in `throw-on-input'; it's for handling `while-no-input'.
3686 Typing C-g sets `quit-flag' to t, regardless of `inhibit-quit',
3687 but `inhibit-quit' non-nil prevents anything from taking notice of that. */);
3690 DEFVAR_LISP ("inhibit-quit", Vinhibit_quit
,
3691 doc
: /* Non-nil inhibits C-g quitting from happening immediately.
3692 Note that `quit-flag' will still be set by typing C-g,
3693 so a quit will be signaled as soon as `inhibit-quit' is nil.
3694 To prevent this happening, set `quit-flag' to nil
3695 before making `inhibit-quit' nil. */);
3696 Vinhibit_quit
= Qnil
;
3698 Qinhibit_quit
= intern_c_string ("inhibit-quit");
3699 staticpro (&Qinhibit_quit
);
3701 Qautoload
= intern_c_string ("autoload");
3702 staticpro (&Qautoload
);
3704 Qdebug_on_error
= intern_c_string ("debug-on-error");
3705 staticpro (&Qdebug_on_error
);
3707 Qmacro
= intern_c_string ("macro");
3708 staticpro (&Qmacro
);
3710 Qdeclare
= intern_c_string ("declare");
3711 staticpro (&Qdeclare
);
3713 /* Note that the process handling also uses Qexit, but we don't want
3714 to staticpro it twice, so we just do it here. */
3715 Qexit
= intern_c_string ("exit");
3718 Qinteractive
= intern_c_string ("interactive");
3719 staticpro (&Qinteractive
);
3721 Qcommandp
= intern_c_string ("commandp");
3722 staticpro (&Qcommandp
);
3724 Qdefun
= intern_c_string ("defun");
3725 staticpro (&Qdefun
);
3727 Qand_rest
= intern_c_string ("&rest");
3728 staticpro (&Qand_rest
);
3730 Qand_optional
= intern_c_string ("&optional");
3731 staticpro (&Qand_optional
);
3733 Qclosure
= intern_c_string ("closure");
3734 staticpro (&Qclosure
);
3736 Qdebug
= intern_c_string ("debug");
3737 staticpro (&Qdebug
);
3739 DEFVAR_LISP ("debug-on-error", Vdebug_on_error
,
3740 doc
: /* *Non-nil means enter debugger if an error is signaled.
3741 Does not apply to errors handled by `condition-case' or those
3742 matched by `debug-ignored-errors'.
3743 If the value is a list, an error only means to enter the debugger
3744 if one of its condition symbols appears in the list.
3745 When you evaluate an expression interactively, this variable
3746 is temporarily non-nil if `eval-expression-debug-on-error' is non-nil.
3747 The command `toggle-debug-on-error' toggles this.
3748 See also the variable `debug-on-quit'. */);
3749 Vdebug_on_error
= Qnil
;
3751 DEFVAR_LISP ("debug-ignored-errors", Vdebug_ignored_errors
,
3752 doc
: /* *List of errors for which the debugger should not be called.
3753 Each element may be a condition-name or a regexp that matches error messages.
3754 If any element applies to a given error, that error skips the debugger
3755 and just returns to top level.
3756 This overrides the variable `debug-on-error'.
3757 It does not apply to errors handled by `condition-case'. */);
3758 Vdebug_ignored_errors
= Qnil
;
3760 DEFVAR_BOOL ("debug-on-quit", debug_on_quit
,
3761 doc
: /* *Non-nil means enter debugger if quit is signaled (C-g, for example).
3762 Does not apply if quit is handled by a `condition-case'. */);
3765 DEFVAR_BOOL ("debug-on-next-call", debug_on_next_call
,
3766 doc
: /* Non-nil means enter debugger before next `eval', `apply' or `funcall'. */);
3768 DEFVAR_BOOL ("debugger-may-continue", debugger_may_continue
,
3769 doc
: /* Non-nil means debugger may continue execution.
3770 This is nil when the debugger is called under circumstances where it
3771 might not be safe to continue. */);
3772 debugger_may_continue
= 1;
3774 DEFVAR_LISP ("debugger", Vdebugger
,
3775 doc
: /* Function to call to invoke debugger.
3776 If due to frame exit, args are `exit' and the value being returned;
3777 this function's value will be returned instead of that.
3778 If due to error, args are `error' and a list of the args to `signal'.
3779 If due to `apply' or `funcall' entry, one arg, `lambda'.
3780 If due to `eval' entry, one arg, t. */);
3783 DEFVAR_LISP ("signal-hook-function", Vsignal_hook_function
,
3784 doc
: /* If non-nil, this is a function for `signal' to call.
3785 It receives the same arguments that `signal' was given.
3786 The Edebug package uses this to regain control. */);
3787 Vsignal_hook_function
= Qnil
;
3789 DEFVAR_LISP ("debug-on-signal", Vdebug_on_signal
,
3790 doc
: /* *Non-nil means call the debugger regardless of condition handlers.
3791 Note that `debug-on-error', `debug-on-quit' and friends
3792 still determine whether to handle the particular condition. */);
3793 Vdebug_on_signal
= Qnil
;
3795 DEFVAR_LISP ("macro-declaration-function", Vmacro_declaration_function
,
3796 doc
: /* Function to process declarations in a macro definition.
3797 The function will be called with two args MACRO and DECL.
3798 MACRO is the name of the macro being defined.
3799 DECL is a list `(declare ...)' containing the declarations.
3800 The value the function returns is not used. */);
3801 Vmacro_declaration_function
= Qnil
;
3803 /* When lexical binding is being used,
3804 vinternal_interpreter_environment is non-nil, and contains an alist
3805 of lexically-bound variable, or (t), indicating an empty
3806 environment. The lisp name of this variable would be
3807 `internal-interpreter-environment' if it weren't hidden.
3808 Every element of this list can be either a cons (VAR . VAL)
3809 specifying a lexical binding, or a single symbol VAR indicating
3810 that this variable should use dynamic scoping. */
3811 Qinternal_interpreter_environment
3812 = intern_c_string ("internal-interpreter-environment");
3813 staticpro (&Qinternal_interpreter_environment
);
3814 DEFVAR_LISP ("internal-interpreter-environment",
3815 Vinternal_interpreter_environment
,
3816 doc
: /* If non-nil, the current lexical environment of the lisp interpreter.
3817 When lexical binding is not being used, this variable is nil.
3818 A value of `(t)' indicates an empty environment, otherwise it is an
3819 alist of active lexical bindings. */);
3820 Vinternal_interpreter_environment
= Qnil
;
3821 /* Don't export this variable to Elisp, so noone can mess with it
3822 (Just imagine if someone makes it buffer-local). */
3823 Funintern (Qinternal_interpreter_environment
, Qnil
);
3825 Vrun_hooks
= intern_c_string ("run-hooks");
3826 staticpro (&Vrun_hooks
);
3828 staticpro (&Vautoload_queue
);
3829 Vautoload_queue
= Qnil
;
3830 staticpro (&Vsignaling_function
);
3831 Vsignaling_function
= Qnil
;
3842 defsubr (&Sfunction
);
3844 defsubr (&Sdefmacro
);
3846 defsubr (&Sdefvaralias
);
3847 defsubr (&Sdefconst
);
3848 defsubr (&Suser_variable_p
);
3852 defsubr (&Smacroexpand
);
3855 defsubr (&Sunwind_protect
);
3856 defsubr (&Scondition_case
);
3858 defsubr (&Sinteractive_p
);
3859 defsubr (&Scalled_interactively_p
);
3860 defsubr (&Scommandp
);
3861 defsubr (&Sautoload
);
3864 defsubr (&Sfuncall
);
3865 defsubr (&Srun_hooks
);
3866 defsubr (&Srun_hook_with_args
);
3867 defsubr (&Srun_hook_with_args_until_success
);
3868 defsubr (&Srun_hook_with_args_until_failure
);
3869 defsubr (&Srun_hook_wrapped
);
3870 defsubr (&Sfetch_bytecode
);
3871 defsubr (&Sbacktrace_debug
);
3872 defsubr (&Sbacktrace
);
3873 defsubr (&Sbacktrace_frame
);
3874 defsubr (&Sspecial_variable_p
);
3875 defsubr (&Sfunctionp
);