1 /* Evaluator for GNU Emacs Lisp interpreter.
2 Copyright (C) 1985, 86, 87, 93, 94, 95, 99, 2000, 2001, 2002
3 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
25 #include "blockinput.h"
28 #include "dispextern.h"
31 /* This definition is duplicated in alloc.c and keyboard.c */
32 /* Putting it in lisp.h makes cc bomb out! */
36 struct backtrace
*next
;
37 Lisp_Object
*function
;
38 Lisp_Object
*args
; /* Points to vector of args. */
39 int nargs
; /* Length of vector.
40 If nargs is UNEVALLED, args points to slot holding
41 list of unevalled args */
43 /* Nonzero means call value of debugger when done with this operation. */
47 struct backtrace
*backtrace_list
;
49 /* This structure helps implement the `catch' and `throw' control
50 structure. A struct catchtag contains all the information needed
51 to restore the state of the interpreter after a non-local jump.
53 Handlers for error conditions (represented by `struct handler'
54 structures) just point to a catch tag to do the cleanup required
57 catchtag structures are chained together in the C calling stack;
58 the `next' member points to the next outer catchtag.
60 A call like (throw TAG VAL) searches for a catchtag whose `tag'
61 member is TAG, and then unbinds to it. The `val' member is used to
62 hold VAL while the stack is unwound; `val' is returned as the value
65 All the other members are concerned with restoring the interpreter
72 struct catchtag
*next
;
75 struct backtrace
*backlist
;
76 struct handler
*handlerlist
;
79 int poll_suppress_count
;
80 struct byte_stack
*byte_stack
;
83 struct catchtag
*catchlist
;
86 /* Count levels of GCPRO to detect failure to UNGCPRO. */
90 Lisp_Object Qautoload
, Qmacro
, Qexit
, Qinteractive
, Qcommandp
, Qdefun
, Qdefvar
;
91 Lisp_Object Qinhibit_quit
, Vinhibit_quit
, Vquit_flag
;
92 Lisp_Object Qand_rest
, Qand_optional
;
93 Lisp_Object Qdebug_on_error
;
96 /* This holds either the symbol `run-hooks' or nil.
97 It is nil at an early stage of startup, and when Emacs
100 Lisp_Object Vrun_hooks
;
102 /* Non-nil means record all fset's and provide's, to be undone
103 if the file being autoloaded is not fully loaded.
104 They are recorded by being consed onto the front of Vautoload_queue:
105 (FUN . ODEF) for a defun, (OFEATURES . nil) for a provide. */
107 Lisp_Object Vautoload_queue
;
109 /* Current number of specbindings allocated in specpdl. */
113 /* Pointer to beginning of specpdl. */
115 struct specbinding
*specpdl
;
117 /* Pointer to first unused element in specpdl. */
119 struct specbinding
*specpdl_ptr
;
121 /* Maximum size allowed for specpdl allocation */
123 EMACS_INT max_specpdl_size
;
125 /* Depth in Lisp evaluations and function calls. */
129 /* Maximum allowed depth in Lisp evaluations and function calls. */
131 EMACS_INT max_lisp_eval_depth
;
133 /* Nonzero means enter debugger before next function call */
135 int debug_on_next_call
;
137 /* Non-zero means debugger may continue. This is zero when the
138 debugger is called during redisplay, where it might not be safe to
139 continue the interrupted redisplay. */
141 int debugger_may_continue
;
143 /* List of conditions (non-nil atom means all) which cause a backtrace
144 if an error is handled by the command loop's error handler. */
146 Lisp_Object Vstack_trace_on_error
;
148 /* List of conditions (non-nil atom means all) which enter the debugger
149 if an error is handled by the command loop's error handler. */
151 Lisp_Object Vdebug_on_error
;
153 /* List of conditions and regexps specifying error messages which
154 do not enter the debugger even if Vdebug_on_error says they should. */
156 Lisp_Object Vdebug_ignored_errors
;
158 /* Non-nil means call the debugger even if the error will be handled. */
160 Lisp_Object Vdebug_on_signal
;
162 /* Hook for edebug to use. */
164 Lisp_Object Vsignal_hook_function
;
166 /* Nonzero means enter debugger if a quit signal
167 is handled by the command loop's error handler. */
171 /* The value of num_nonmacro_input_events as of the last time we
172 started to enter the debugger. If we decide to enter the debugger
173 again when this is still equal to num_nonmacro_input_events, then we
174 know that the debugger itself has an error, and we should just
175 signal the error instead of entering an infinite loop of debugger
178 int when_entered_debugger
;
180 Lisp_Object Vdebugger
;
182 /* The function from which the last `signal' was called. Set in
185 Lisp_Object Vsignaling_function
;
187 /* Set to non-zero while processing X events. Checked in Feval to
188 make sure the Lisp interpreter isn't called from a signal handler,
189 which is unsafe because the interpreter isn't reentrant. */
193 /* Function to process declarations in defmacro forms. */
195 Lisp_Object Vmacro_declaration_function
;
198 static Lisp_Object funcall_lambda
P_ ((Lisp_Object
, int, Lisp_Object
*));
204 specpdl
= (struct specbinding
*) xmalloc (specpdl_size
* sizeof (struct specbinding
));
205 specpdl_ptr
= specpdl
;
206 max_specpdl_size
= 600;
207 max_lisp_eval_depth
= 300;
215 specpdl_ptr
= specpdl
;
220 debug_on_next_call
= 0;
225 /* This is less than the initial value of num_nonmacro_input_events. */
226 when_entered_debugger
= -1;
233 int debug_while_redisplaying
;
234 int count
= SPECPDL_INDEX ();
237 if (lisp_eval_depth
+ 20 > max_lisp_eval_depth
)
238 max_lisp_eval_depth
= lisp_eval_depth
+ 20;
240 if (specpdl_size
+ 40 > max_specpdl_size
)
241 max_specpdl_size
= specpdl_size
+ 40;
243 #ifdef HAVE_X_WINDOWS
244 if (display_hourglass_p
)
248 debug_on_next_call
= 0;
249 when_entered_debugger
= num_nonmacro_input_events
;
251 /* Resetting redisplaying_p to 0 makes sure that debug output is
252 displayed if the debugger is invoked during redisplay. */
253 debug_while_redisplaying
= redisplaying_p
;
255 specbind (intern ("debugger-may-continue"),
256 debug_while_redisplaying
? Qnil
: Qt
);
257 specbind (Qinhibit_redisplay
, Qnil
);
259 #if 0 /* Binding this prevents execution of Lisp code during
260 redisplay, which necessarily leads to display problems. */
261 specbind (Qinhibit_eval_during_redisplay
, Qt
);
264 val
= apply1 (Vdebugger
, arg
);
266 /* Interrupting redisplay and resuming it later is not safe under
267 all circumstances. So, when the debugger returns, abort the
268 interrupted redisplay by going back to the top-level. */
269 if (debug_while_redisplaying
)
272 return unbind_to (count
, val
);
276 do_debug_on_call (code
)
279 debug_on_next_call
= 0;
280 backtrace_list
->debug_on_exit
= 1;
281 call_debugger (Fcons (code
, Qnil
));
284 /* NOTE!!! Every function that can call EVAL must protect its args
285 and temporaries from garbage collection while it needs them.
286 The definition of `For' shows what you have to do. */
288 DEFUN ("or", For
, Sor
, 0, UNEVALLED
, 0,
289 doc
: /* Eval args until one of them yields non-nil, then return that value.
290 The remaining args are not evalled at all.
291 If all args return nil, return nil.
292 usage: (or CONDITIONS ...) */)
296 register Lisp_Object val
;
297 Lisp_Object args_left
;
308 val
= Feval (Fcar (args_left
));
311 args_left
= Fcdr (args_left
);
313 while (!NILP(args_left
));
319 DEFUN ("and", Fand
, Sand
, 0, UNEVALLED
, 0,
320 doc
: /* Eval args until one of them yields nil, then return nil.
321 The remaining args are not evalled at all.
322 If no arg yields nil, return the last arg's value.
323 usage: (and CONDITIONS ...) */)
327 register Lisp_Object val
;
328 Lisp_Object args_left
;
339 val
= Feval (Fcar (args_left
));
342 args_left
= Fcdr (args_left
);
344 while (!NILP(args_left
));
350 DEFUN ("if", Fif
, Sif
, 2, UNEVALLED
, 0,
351 doc
: /* If COND yields non-nil, do THEN, else do ELSE...
352 Returns the value of THEN or the value of the last of the ELSE's.
353 THEN must be one expression, but ELSE... can be zero or more expressions.
354 If COND yields nil, and there are no ELSE's, the value is nil.
355 usage: (if COND THEN ELSE...) */)
359 register Lisp_Object cond
;
363 cond
= Feval (Fcar (args
));
367 return Feval (Fcar (Fcdr (args
)));
368 return Fprogn (Fcdr (Fcdr (args
)));
371 DEFUN ("cond", Fcond
, Scond
, 0, UNEVALLED
, 0,
372 doc
: /* Try each clause until one succeeds.
373 Each clause looks like (CONDITION BODY...). CONDITION is evaluated
374 and, if the value is non-nil, this clause succeeds:
375 then the expressions in BODY are evaluated and the last one's
376 value is the value of the cond-form.
377 If no clause succeeds, cond returns nil.
378 If a clause has one element, as in (CONDITION),
379 CONDITION's value if non-nil is returned from the cond-form.
380 usage: (cond CLAUSES...) */)
384 register Lisp_Object clause
, val
;
391 clause
= Fcar (args
);
392 val
= Feval (Fcar (clause
));
395 if (!EQ (XCDR (clause
), Qnil
))
396 val
= Fprogn (XCDR (clause
));
406 DEFUN ("progn", Fprogn
, Sprogn
, 0, UNEVALLED
, 0,
407 doc
: /* Eval BODY forms sequentially and return value of last one.
408 usage: (progn BODY ...) */)
412 register Lisp_Object val
;
413 Lisp_Object args_left
;
424 val
= Feval (Fcar (args_left
));
425 args_left
= Fcdr (args_left
);
427 while (!NILP(args_left
));
433 DEFUN ("prog1", Fprog1
, Sprog1
, 1, UNEVALLED
, 0,
434 doc
: /* Eval FIRST and BODY sequentially; value from FIRST.
435 The value of FIRST is saved during the evaluation of the remaining args,
436 whose values are discarded.
437 usage: (prog1 FIRST BODY...) */)
442 register Lisp_Object args_left
;
443 struct gcpro gcpro1
, gcpro2
;
444 register int argnum
= 0;
456 val
= Feval (Fcar (args_left
));
458 Feval (Fcar (args_left
));
459 args_left
= Fcdr (args_left
);
461 while (!NILP(args_left
));
467 DEFUN ("prog2", Fprog2
, Sprog2
, 2, UNEVALLED
, 0,
468 doc
: /* Eval X, Y and BODY sequentially; value from Y.
469 The value of Y is saved during the evaluation of the remaining args,
470 whose values are discarded.
471 usage: (prog2 X Y BODY...) */)
476 register Lisp_Object args_left
;
477 struct gcpro gcpro1
, gcpro2
;
478 register int argnum
= -1;
492 val
= Feval (Fcar (args_left
));
494 Feval (Fcar (args_left
));
495 args_left
= Fcdr (args_left
);
497 while (!NILP (args_left
));
503 DEFUN ("setq", Fsetq
, Ssetq
, 0, UNEVALLED
, 0,
504 doc
: /* Set each SYM to the value of its VAL.
505 The symbols SYM are variables; they are literal (not evaluated).
506 The values VAL are expressions; they are evaluated.
507 Thus, (setq x (1+ y)) sets `x' to the value of `(1+ y)'.
508 The second VAL is not computed until after the first SYM is set, and so on;
509 each VAL can use the new value of variables set earlier in the `setq'.
510 The return value of the `setq' form is the value of the last VAL.
511 usage: (setq SYM VAL SYM VAL ...) */)
515 register Lisp_Object args_left
;
516 register Lisp_Object val
, sym
;
527 val
= Feval (Fcar (Fcdr (args_left
)));
528 sym
= Fcar (args_left
);
530 args_left
= Fcdr (Fcdr (args_left
));
532 while (!NILP(args_left
));
538 DEFUN ("quote", Fquote
, Squote
, 1, UNEVALLED
, 0,
539 doc
: /* Return the argument, without evaluating it. `(quote x)' yields `x'.
540 usage: (quote ARG) */)
547 DEFUN ("function", Ffunction
, Sfunction
, 1, UNEVALLED
, 0,
548 doc
: /* Like `quote', but preferred for objects which are functions.
549 In byte compilation, `function' causes its argument to be compiled.
550 `quote' cannot do that.
551 usage: (function ARG) */)
559 DEFUN ("interactive-p", Finteractive_p
, Sinteractive_p
, 0, 0, 0,
560 doc
: /* Return t if function in which this appears was called interactively.
561 This means that the function was called with call-interactively (which
562 includes being called as the binding of a key)
563 and input is currently coming from the keyboard (not in keyboard macro). */)
566 return interactive_p (1) ? Qt
: Qnil
;
570 /* Return 1 if function in which this appears was called
571 interactively. This means that the function was called with
572 call-interactively (which includes being called as the binding of
573 a key) and input is currently coming from the keyboard (not in
576 EXCLUDE_SUBRS_P non-zero means always return 0 if the function
577 called is a built-in. */
580 interactive_p (exclude_subrs_p
)
583 struct backtrace
*btp
;
589 btp
= backtrace_list
;
591 /* If this isn't a byte-compiled function, there may be a frame at
592 the top for Finteractive_p. If so, skip it. */
593 fun
= Findirect_function (*btp
->function
);
594 if (SUBRP (fun
) && XSUBR (fun
) == &Sinteractive_p
)
597 /* If we're running an Emacs 18-style byte-compiled function, there
598 may be a frame for Fbytecode at the top level. In any version of
599 Emacs there can be Fbytecode frames for subexpressions evaluated
600 inside catch and condition-case. Skip past them.
602 If this isn't a byte-compiled function, then we may now be
603 looking at several frames for special forms. Skip past them. */
605 && (EQ (*btp
->function
, Qbytecode
)
606 || btp
->nargs
== UNEVALLED
))
609 /* btp now points at the frame of the innermost function that isn't
610 a special form, ignoring frames for Finteractive_p and/or
611 Fbytecode at the top. If this frame is for a built-in function
612 (such as load or eval-region) return nil. */
613 fun
= Findirect_function (*btp
->function
);
614 if (exclude_subrs_p
&& SUBRP (fun
))
617 /* btp points to the frame of a Lisp function that called interactive-p.
618 Return t if that function was called interactively. */
619 if (btp
&& btp
->next
&& EQ (*btp
->next
->function
, Qcall_interactively
))
625 DEFUN ("defun", Fdefun
, Sdefun
, 2, UNEVALLED
, 0,
626 doc
: /* Define NAME as a function.
627 The definition is (lambda ARGLIST [DOCSTRING] BODY...).
628 See also the function `interactive'.
629 usage: (defun NAME ARGLIST [DOCSTRING] BODY...) */)
633 register Lisp_Object fn_name
;
634 register Lisp_Object defn
;
636 fn_name
= Fcar (args
);
637 defn
= Fcons (Qlambda
, Fcdr (args
));
638 if (!NILP (Vpurify_flag
))
639 defn
= Fpurecopy (defn
);
640 Ffset (fn_name
, defn
);
641 LOADHIST_ATTACH (fn_name
);
645 DEFUN ("defmacro", Fdefmacro
, Sdefmacro
, 2, UNEVALLED
, 0,
646 doc
: /* Define NAME as a macro.
647 The actual definition looks like
648 (macro lambda ARGLIST [DOCSTRING] [DECL] BODY...).
649 When the macro is called, as in (NAME ARGS...),
650 the function (lambda ARGLIST BODY...) is applied to
651 the list ARGS... as it appears in the expression,
652 and the result should be a form to be evaluated instead of the original.
654 DECL is a declaration, optional, which can specify how to indent
655 calls to this macro and how Edebug should handle it. It looks like this:
657 The elements can look like this:
659 Set NAME's `lisp-indent-function' property to INDENT.
662 Set NAME's `edebug-form-spec' property to DEBUG. (This is
663 equivalent to writing a `def-edebug-spec' for the macro.
664 usage: (defmacro NAME ARGLIST [DOCSTRING] [DECL] BODY...) */)
668 register Lisp_Object fn_name
;
669 register Lisp_Object defn
;
670 Lisp_Object lambda_list
, doc
, tail
;
672 fn_name
= Fcar (args
);
673 lambda_list
= Fcar (Fcdr (args
));
674 tail
= Fcdr (Fcdr (args
));
677 if (STRINGP (Fcar (tail
)))
683 while (CONSP (Fcar (tail
))
684 && EQ (Fcar (Fcar (tail
)), Qdeclare
))
686 if (!NILP (Vmacro_declaration_function
))
690 call2 (Vmacro_declaration_function
, fn_name
, Fcar (tail
));
698 tail
= Fcons (lambda_list
, tail
);
700 tail
= Fcons (lambda_list
, Fcons (doc
, tail
));
701 defn
= Fcons (Qmacro
, Fcons (Qlambda
, tail
));
703 if (!NILP (Vpurify_flag
))
704 defn
= Fpurecopy (defn
);
705 Ffset (fn_name
, defn
);
706 LOADHIST_ATTACH (fn_name
);
711 DEFUN ("defvaralias", Fdefvaralias
, Sdefvaralias
, 2, 3, 0,
712 doc
: /* Make SYMBOL a variable alias for symbol ALIASED.
713 Setting the value of SYMBOL will subsequently set the value of ALIASED,
714 and getting the value of SYMBOL will return the value ALIASED has.
715 ALIASED nil means remove the alias; SYMBOL is unbound after that.
716 Third arg DOCSTRING, if non-nil, is documentation for SYMBOL. */)
717 (symbol
, aliased
, docstring
)
718 Lisp_Object symbol
, aliased
, docstring
;
720 struct Lisp_Symbol
*sym
;
722 CHECK_SYMBOL (symbol
);
723 CHECK_SYMBOL (aliased
);
725 if (SYMBOL_CONSTANT_P (symbol
))
726 error ("Cannot make a constant an alias");
728 sym
= XSYMBOL (symbol
);
729 sym
->indirect_variable
= 1;
730 sym
->value
= aliased
;
731 sym
->constant
= SYMBOL_CONSTANT_P (aliased
);
732 LOADHIST_ATTACH (Fcons (Qdefvar
, symbol
));
733 if (!NILP (docstring
))
734 Fput (symbol
, Qvariable_documentation
, docstring
);
740 DEFUN ("defvar", Fdefvar
, Sdefvar
, 1, UNEVALLED
, 0,
741 doc
: /* Define SYMBOL as a variable.
742 You are not required to define a variable in order to use it,
743 but the definition can supply documentation and an initial value
744 in a way that tags can recognize.
746 INITVALUE is evaluated, and used to set SYMBOL, only if SYMBOL's value is void.
747 If SYMBOL is buffer-local, its default value is what is set;
748 buffer-local values are not affected.
749 INITVALUE and DOCSTRING are optional.
750 If DOCSTRING starts with *, this variable is identified as a user option.
751 This means that M-x set-variable recognizes it.
752 See also `user-variable-p'.
753 If INITVALUE is missing, SYMBOL's value is not set.
754 usage: (defvar SYMBOL &optional INITVALUE DOCSTRING) */)
758 register Lisp_Object sym
, tem
, tail
;
762 if (!NILP (Fcdr (Fcdr (tail
))))
763 error ("too many arguments");
765 tem
= Fdefault_boundp (sym
);
769 Fset_default (sym
, Feval (Fcar (tail
)));
771 if (!NILP (Fcar (tail
)))
774 if (!NILP (Vpurify_flag
))
775 tem
= Fpurecopy (tem
);
776 Fput (sym
, Qvariable_documentation
, tem
);
778 LOADHIST_ATTACH (Fcons (Qdefvar
, sym
));
781 /* Simple (defvar <var>) should not count as a definition at all.
782 It could get in the way of other definitions, and unloading this
783 package could try to make the variable unbound. */
789 DEFUN ("defconst", Fdefconst
, Sdefconst
, 2, UNEVALLED
, 0,
790 doc
: /* Define SYMBOL as a constant variable.
791 The intent is that neither programs nor users should ever change this value.
792 Always sets the value of SYMBOL to the result of evalling INITVALUE.
793 If SYMBOL is buffer-local, its default value is what is set;
794 buffer-local values are not affected.
795 DOCSTRING is optional.
796 usage: (defconst SYMBOL INITVALUE [DOCSTRING]) */)
800 register Lisp_Object sym
, tem
;
803 if (!NILP (Fcdr (Fcdr (Fcdr (args
)))))
804 error ("too many arguments");
806 tem
= Feval (Fcar (Fcdr (args
)));
807 if (!NILP (Vpurify_flag
))
808 tem
= Fpurecopy (tem
);
809 Fset_default (sym
, tem
);
810 tem
= Fcar (Fcdr (Fcdr (args
)));
813 if (!NILP (Vpurify_flag
))
814 tem
= Fpurecopy (tem
);
815 Fput (sym
, Qvariable_documentation
, tem
);
817 LOADHIST_ATTACH (Fcons (Qdefvar
, sym
));
821 DEFUN ("user-variable-p", Fuser_variable_p
, Suser_variable_p
, 1, 1, 0,
822 doc
: /* Returns t if VARIABLE is intended to be set and modified by users.
823 \(The alternative is a variable used internally in a Lisp program.)
824 Determined by whether the first character of the documentation
825 for the variable is `*' or if the variable is customizable (has a non-nil
826 value of any of `custom-type', `custom-loads' or `standard-value'
827 on its property list). */)
829 Lisp_Object variable
;
831 Lisp_Object documentation
;
833 if (!SYMBOLP (variable
))
836 documentation
= Fget (variable
, Qvariable_documentation
);
837 if (INTEGERP (documentation
) && XINT (documentation
) < 0)
839 if (STRINGP (documentation
)
840 && ((unsigned char) SREF (documentation
, 0) == '*'))
842 /* If it is (STRING . INTEGER), a negative integer means a user variable. */
843 if (CONSP (documentation
)
844 && STRINGP (XCAR (documentation
))
845 && INTEGERP (XCDR (documentation
))
846 && XINT (XCDR (documentation
)) < 0)
849 if ((!NILP (Fget (variable
, intern ("custom-type"))))
850 || (!NILP (Fget (variable
, intern ("custom-loads"))))
851 || (!NILP (Fget (variable
, intern ("standard-value")))))
856 DEFUN ("let*", FletX
, SletX
, 1, UNEVALLED
, 0,
857 doc
: /* Bind variables according to VARLIST then eval BODY.
858 The value of the last form in BODY is returned.
859 Each element of VARLIST is a symbol (which is bound to nil)
860 or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM).
861 Each VALUEFORM can refer to the symbols already bound by this VARLIST.
862 usage: (let* VARLIST BODY...) */)
866 Lisp_Object varlist
, val
, elt
;
867 int count
= SPECPDL_INDEX ();
868 struct gcpro gcpro1
, gcpro2
, gcpro3
;
870 GCPRO3 (args
, elt
, varlist
);
872 varlist
= Fcar (args
);
873 while (!NILP (varlist
))
876 elt
= Fcar (varlist
);
878 specbind (elt
, Qnil
);
879 else if (! NILP (Fcdr (Fcdr (elt
))))
881 Fcons (build_string ("`let' bindings can have only one value-form"),
885 val
= Feval (Fcar (Fcdr (elt
)));
886 specbind (Fcar (elt
), val
);
888 varlist
= Fcdr (varlist
);
891 val
= Fprogn (Fcdr (args
));
892 return unbind_to (count
, val
);
895 DEFUN ("let", Flet
, Slet
, 1, UNEVALLED
, 0,
896 doc
: /* Bind variables according to VARLIST then eval BODY.
897 The value of the last form in BODY is returned.
898 Each element of VARLIST is a symbol (which is bound to nil)
899 or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM).
900 All the VALUEFORMs are evalled before any symbols are bound.
901 usage: (let VARLIST BODY...) */)
905 Lisp_Object
*temps
, tem
;
906 register Lisp_Object elt
, varlist
;
907 int count
= SPECPDL_INDEX ();
909 struct gcpro gcpro1
, gcpro2
;
911 varlist
= Fcar (args
);
913 /* Make space to hold the values to give the bound variables */
914 elt
= Flength (varlist
);
915 temps
= (Lisp_Object
*) alloca (XFASTINT (elt
) * sizeof (Lisp_Object
));
917 /* Compute the values and store them in `temps' */
919 GCPRO2 (args
, *temps
);
922 for (argnum
= 0; !NILP (varlist
); varlist
= Fcdr (varlist
))
925 elt
= Fcar (varlist
);
927 temps
[argnum
++] = Qnil
;
928 else if (! NILP (Fcdr (Fcdr (elt
))))
930 Fcons (build_string ("`let' bindings can have only one value-form"),
933 temps
[argnum
++] = Feval (Fcar (Fcdr (elt
)));
934 gcpro2
.nvars
= argnum
;
938 varlist
= Fcar (args
);
939 for (argnum
= 0; !NILP (varlist
); varlist
= Fcdr (varlist
))
941 elt
= Fcar (varlist
);
942 tem
= temps
[argnum
++];
946 specbind (Fcar (elt
), tem
);
949 elt
= Fprogn (Fcdr (args
));
950 return unbind_to (count
, elt
);
953 DEFUN ("while", Fwhile
, Swhile
, 1, UNEVALLED
, 0,
954 doc
: /* If TEST yields non-nil, eval BODY... and repeat.
955 The order of execution is thus TEST, BODY, TEST, BODY and so on
956 until TEST returns nil.
957 usage: (while TEST BODY...) */)
961 Lisp_Object test
, body
;
962 struct gcpro gcpro1
, gcpro2
;
968 while (!NILP (Feval (test
)))
978 DEFUN ("macroexpand", Fmacroexpand
, Smacroexpand
, 1, 2, 0,
979 doc
: /* Return result of expanding macros at top level of FORM.
980 If FORM is not a macro call, it is returned unchanged.
981 Otherwise, the macro is expanded and the expansion is considered
982 in place of FORM. When a non-macro-call results, it is returned.
984 The second optional arg ENVIRONMENT specifies an environment of macro
985 definitions to shadow the loaded ones for use in file byte-compilation. */)
988 Lisp_Object environment
;
990 /* With cleanups from Hallvard Furuseth. */
991 register Lisp_Object expander
, sym
, def
, tem
;
995 /* Come back here each time we expand a macro call,
996 in case it expands into another macro call. */
999 /* Set SYM, give DEF and TEM right values in case SYM is not a symbol. */
1000 def
= sym
= XCAR (form
);
1002 /* Trace symbols aliases to other symbols
1003 until we get a symbol that is not an alias. */
1004 while (SYMBOLP (def
))
1008 tem
= Fassq (sym
, environment
);
1011 def
= XSYMBOL (sym
)->function
;
1012 if (!EQ (def
, Qunbound
))
1017 /* Right now TEM is the result from SYM in ENVIRONMENT,
1018 and if TEM is nil then DEF is SYM's function definition. */
1021 /* SYM is not mentioned in ENVIRONMENT.
1022 Look at its function definition. */
1023 if (EQ (def
, Qunbound
) || !CONSP (def
))
1024 /* Not defined or definition not suitable */
1026 if (EQ (XCAR (def
), Qautoload
))
1028 /* Autoloading function: will it be a macro when loaded? */
1029 tem
= Fnth (make_number (4), def
);
1030 if (EQ (tem
, Qt
) || EQ (tem
, Qmacro
))
1031 /* Yes, load it and try again. */
1033 struct gcpro gcpro1
;
1035 do_autoload (def
, sym
);
1042 else if (!EQ (XCAR (def
), Qmacro
))
1044 else expander
= XCDR (def
);
1048 expander
= XCDR (tem
);
1049 if (NILP (expander
))
1052 form
= apply1 (expander
, XCDR (form
));
1057 DEFUN ("catch", Fcatch
, Scatch
, 1, UNEVALLED
, 0,
1058 doc
: /* Eval BODY allowing nonlocal exits using `throw'.
1059 TAG is evalled to get the tag to use; it must not be nil.
1061 Then the BODY is executed.
1062 Within BODY, (throw TAG) with same tag exits BODY and exits this `catch'.
1063 If no throw happens, `catch' returns the value of the last BODY form.
1064 If a throw happens, it specifies the value to return from `catch'.
1065 usage: (catch TAG BODY...) */)
1069 register Lisp_Object tag
;
1070 struct gcpro gcpro1
;
1073 tag
= Feval (Fcar (args
));
1075 return internal_catch (tag
, Fprogn
, Fcdr (args
));
1078 /* Set up a catch, then call C function FUNC on argument ARG.
1079 FUNC should return a Lisp_Object.
1080 This is how catches are done from within C code. */
1083 internal_catch (tag
, func
, arg
)
1085 Lisp_Object (*func
) ();
1088 /* This structure is made part of the chain `catchlist'. */
1091 /* Fill in the components of c, and put it on the list. */
1095 c
.backlist
= backtrace_list
;
1096 c
.handlerlist
= handlerlist
;
1097 c
.lisp_eval_depth
= lisp_eval_depth
;
1098 c
.pdlcount
= SPECPDL_INDEX ();
1099 c
.poll_suppress_count
= poll_suppress_count
;
1100 c
.gcpro
= gcprolist
;
1101 c
.byte_stack
= byte_stack_list
;
1105 if (! _setjmp (c
.jmp
))
1106 c
.val
= (*func
) (arg
);
1108 /* Throw works by a longjmp that comes right here. */
1113 /* Unwind the specbind, catch, and handler stacks back to CATCH, and
1114 jump to that CATCH, returning VALUE as the value of that catch.
1116 This is the guts Fthrow and Fsignal; they differ only in the way
1117 they choose the catch tag to throw to. A catch tag for a
1118 condition-case form has a TAG of Qnil.
1120 Before each catch is discarded, unbind all special bindings and
1121 execute all unwind-protect clauses made above that catch. Unwind
1122 the handler stack as we go, so that the proper handlers are in
1123 effect for each unwind-protect clause we run. At the end, restore
1124 some static info saved in CATCH, and longjmp to the location
1127 This is used for correct unwinding in Fthrow and Fsignal. */
1130 unwind_to_catch (catch, value
)
1131 struct catchtag
*catch;
1134 register int last_time
;
1136 /* Save the value in the tag. */
1139 /* Restore the polling-suppression count. */
1140 set_poll_suppress_count (catch->poll_suppress_count
);
1144 last_time
= catchlist
== catch;
1146 /* Unwind the specpdl stack, and then restore the proper set of
1148 unbind_to (catchlist
->pdlcount
, Qnil
);
1149 handlerlist
= catchlist
->handlerlist
;
1150 catchlist
= catchlist
->next
;
1152 while (! last_time
);
1154 byte_stack_list
= catch->byte_stack
;
1155 gcprolist
= catch->gcpro
;
1158 gcpro_level
= gcprolist
->level
+ 1;
1162 backtrace_list
= catch->backlist
;
1163 lisp_eval_depth
= catch->lisp_eval_depth
;
1165 _longjmp (catch->jmp
, 1);
1168 DEFUN ("throw", Fthrow
, Sthrow
, 2, 2, 0,
1169 doc
: /* Throw to the catch for TAG and return VALUE from it.
1170 Both TAG and VALUE are evalled. */)
1172 register Lisp_Object tag
, value
;
1174 register struct catchtag
*c
;
1179 for (c
= catchlist
; c
; c
= c
->next
)
1181 if (EQ (c
->tag
, tag
))
1182 unwind_to_catch (c
, value
);
1184 tag
= Fsignal (Qno_catch
, Fcons (tag
, Fcons (value
, Qnil
)));
1189 DEFUN ("unwind-protect", Funwind_protect
, Sunwind_protect
, 1, UNEVALLED
, 0,
1190 doc
: /* Do BODYFORM, protecting with UNWINDFORMS.
1191 If BODYFORM completes normally, its value is returned
1192 after executing the UNWINDFORMS.
1193 If BODYFORM exits nonlocally, the UNWINDFORMS are executed anyway.
1194 usage: (unwind-protect BODYFORM UNWINDFORMS...) */)
1199 int count
= SPECPDL_INDEX ();
1201 record_unwind_protect (0, Fcdr (args
));
1202 val
= Feval (Fcar (args
));
1203 return unbind_to (count
, val
);
1206 /* Chain of condition handlers currently in effect.
1207 The elements of this chain are contained in the stack frames
1208 of Fcondition_case and internal_condition_case.
1209 When an error is signaled (by calling Fsignal, below),
1210 this chain is searched for an element that applies. */
1212 struct handler
*handlerlist
;
1214 DEFUN ("condition-case", Fcondition_case
, Scondition_case
, 2, UNEVALLED
, 0,
1215 doc
: /* Regain control when an error is signaled.
1216 Executes BODYFORM and returns its value if no error happens.
1217 Each element of HANDLERS looks like (CONDITION-NAME BODY...)
1218 where the BODY is made of Lisp expressions.
1220 A handler is applicable to an error
1221 if CONDITION-NAME is one of the error's condition names.
1222 If an error happens, the first applicable handler is run.
1224 The car of a handler may be a list of condition names
1225 instead of a single condition name.
1227 When a handler handles an error,
1228 control returns to the condition-case and the handler BODY... is executed
1229 with VAR bound to (SIGNALED-CONDITIONS . SIGNAL-DATA).
1230 VAR may be nil; then you do not get access to the signal information.
1232 The value of the last BODY form is returned from the condition-case.
1233 See also the function `signal' for more info.
1234 usage: (condition-case VAR BODYFORM HANDLERS...) */)
1241 register Lisp_Object bodyform
, handlers
;
1242 volatile Lisp_Object var
;
1245 bodyform
= Fcar (Fcdr (args
));
1246 handlers
= Fcdr (Fcdr (args
));
1249 for (val
= handlers
; ! NILP (val
); val
= Fcdr (val
))
1255 && (SYMBOLP (XCAR (tem
))
1256 || CONSP (XCAR (tem
))))))
1257 error ("Invalid condition handler", tem
);
1262 c
.backlist
= backtrace_list
;
1263 c
.handlerlist
= handlerlist
;
1264 c
.lisp_eval_depth
= lisp_eval_depth
;
1265 c
.pdlcount
= SPECPDL_INDEX ();
1266 c
.poll_suppress_count
= poll_suppress_count
;
1267 c
.gcpro
= gcprolist
;
1268 c
.byte_stack
= byte_stack_list
;
1269 if (_setjmp (c
.jmp
))
1272 specbind (h
.var
, c
.val
);
1273 val
= Fprogn (Fcdr (h
.chosen_clause
));
1275 /* Note that this just undoes the binding of h.var; whoever
1276 longjumped to us unwound the stack to c.pdlcount before
1278 unbind_to (c
.pdlcount
, Qnil
);
1285 h
.handler
= handlers
;
1286 h
.next
= handlerlist
;
1290 val
= Feval (bodyform
);
1292 handlerlist
= h
.next
;
1296 /* Call the function BFUN with no arguments, catching errors within it
1297 according to HANDLERS. If there is an error, call HFUN with
1298 one argument which is the data that describes the error:
1301 HANDLERS can be a list of conditions to catch.
1302 If HANDLERS is Qt, catch all errors.
1303 If HANDLERS is Qerror, catch all errors
1304 but allow the debugger to run if that is enabled. */
1307 internal_condition_case (bfun
, handlers
, hfun
)
1308 Lisp_Object (*bfun
) ();
1309 Lisp_Object handlers
;
1310 Lisp_Object (*hfun
) ();
1316 #if 0 /* Can't do this check anymore because realize_basic_faces has
1317 to BLOCK_INPUT, and can call Lisp. What's really needed is a
1318 flag indicating that we're currently handling a signal. */
1319 /* Since Fsignal resets this to 0, it had better be 0 now
1320 or else we have a potential bug. */
1321 if (interrupt_input_blocked
!= 0)
1327 c
.backlist
= backtrace_list
;
1328 c
.handlerlist
= handlerlist
;
1329 c
.lisp_eval_depth
= lisp_eval_depth
;
1330 c
.pdlcount
= SPECPDL_INDEX ();
1331 c
.poll_suppress_count
= poll_suppress_count
;
1332 c
.gcpro
= gcprolist
;
1333 c
.byte_stack
= byte_stack_list
;
1334 if (_setjmp (c
.jmp
))
1336 return (*hfun
) (c
.val
);
1340 h
.handler
= handlers
;
1342 h
.next
= handlerlist
;
1348 handlerlist
= h
.next
;
1352 /* Like internal_condition_case but call HFUN with ARG as its argument. */
1355 internal_condition_case_1 (bfun
, arg
, handlers
, hfun
)
1356 Lisp_Object (*bfun
) ();
1358 Lisp_Object handlers
;
1359 Lisp_Object (*hfun
) ();
1367 c
.backlist
= backtrace_list
;
1368 c
.handlerlist
= handlerlist
;
1369 c
.lisp_eval_depth
= lisp_eval_depth
;
1370 c
.pdlcount
= SPECPDL_INDEX ();
1371 c
.poll_suppress_count
= poll_suppress_count
;
1372 c
.gcpro
= gcprolist
;
1373 c
.byte_stack
= byte_stack_list
;
1374 if (_setjmp (c
.jmp
))
1376 return (*hfun
) (c
.val
);
1380 h
.handler
= handlers
;
1382 h
.next
= handlerlist
;
1386 val
= (*bfun
) (arg
);
1388 handlerlist
= h
.next
;
1393 /* Like internal_condition_case but call HFUN with NARGS as first,
1394 and ARGS as second argument. */
1397 internal_condition_case_2 (bfun
, nargs
, args
, handlers
, hfun
)
1398 Lisp_Object (*bfun
) ();
1401 Lisp_Object handlers
;
1402 Lisp_Object (*hfun
) ();
1410 c
.backlist
= backtrace_list
;
1411 c
.handlerlist
= handlerlist
;
1412 c
.lisp_eval_depth
= lisp_eval_depth
;
1413 c
.pdlcount
= SPECPDL_INDEX ();
1414 c
.poll_suppress_count
= poll_suppress_count
;
1415 c
.gcpro
= gcprolist
;
1416 c
.byte_stack
= byte_stack_list
;
1417 if (_setjmp (c
.jmp
))
1419 return (*hfun
) (c
.val
);
1423 h
.handler
= handlers
;
1425 h
.next
= handlerlist
;
1429 val
= (*bfun
) (nargs
, args
);
1431 handlerlist
= h
.next
;
1436 static Lisp_Object find_handler_clause
P_ ((Lisp_Object
, Lisp_Object
,
1437 Lisp_Object
, Lisp_Object
,
1440 DEFUN ("signal", Fsignal
, Ssignal
, 2, 2, 0,
1441 doc
: /* Signal an error. Args are ERROR-SYMBOL and associated DATA.
1442 This function does not return.
1444 An error symbol is a symbol with an `error-conditions' property
1445 that is a list of condition names.
1446 A handler for any of those names will get to handle this signal.
1447 The symbol `error' should normally be one of them.
1449 DATA should be a list. Its elements are printed as part of the error message.
1450 If the signal is handled, DATA is made available to the handler.
1451 See also the function `condition-case'. */)
1452 (error_symbol
, data
)
1453 Lisp_Object error_symbol
, data
;
1455 /* When memory is full, ERROR-SYMBOL is nil,
1456 and DATA is (REAL-ERROR-SYMBOL . REAL-DATA).
1457 That is a special case--don't do this in other situations. */
1458 register struct handler
*allhandlers
= handlerlist
;
1459 Lisp_Object conditions
;
1460 extern int gc_in_progress
;
1461 extern int waiting_for_input
;
1462 Lisp_Object debugger_value
;
1464 Lisp_Object real_error_symbol
;
1465 struct backtrace
*bp
;
1467 immediate_quit
= handling_signal
= 0;
1468 if (gc_in_progress
|| waiting_for_input
)
1471 TOTALLY_UNBLOCK_INPUT
;
1473 if (NILP (error_symbol
))
1474 real_error_symbol
= Fcar (data
);
1476 real_error_symbol
= error_symbol
;
1478 #if 0 /* rms: I don't know why this was here,
1479 but it is surely wrong for an error that is handled. */
1480 #ifdef HAVE_X_WINDOWS
1481 if (display_hourglass_p
)
1482 cancel_hourglass ();
1486 /* This hook is used by edebug. */
1487 if (! NILP (Vsignal_hook_function
)
1488 && ! NILP (error_symbol
))
1489 call2 (Vsignal_hook_function
, error_symbol
, data
);
1491 conditions
= Fget (real_error_symbol
, Qerror_conditions
);
1493 /* Remember from where signal was called. Skip over the frame for
1494 `signal' itself. If a frame for `error' follows, skip that,
1495 too. Don't do this when ERROR_SYMBOL is nil, because that
1496 is a memory-full error. */
1497 Vsignaling_function
= Qnil
;
1498 if (backtrace_list
&& !NILP (error_symbol
))
1500 bp
= backtrace_list
->next
;
1501 if (bp
&& bp
->function
&& EQ (*bp
->function
, Qerror
))
1503 if (bp
&& bp
->function
)
1504 Vsignaling_function
= *bp
->function
;
1507 for (; handlerlist
; handlerlist
= handlerlist
->next
)
1509 register Lisp_Object clause
;
1511 if (lisp_eval_depth
+ 20 > max_lisp_eval_depth
)
1512 max_lisp_eval_depth
= lisp_eval_depth
+ 20;
1514 if (specpdl_size
+ 40 > max_specpdl_size
)
1515 max_specpdl_size
= specpdl_size
+ 40;
1517 clause
= find_handler_clause (handlerlist
->handler
, conditions
,
1518 error_symbol
, data
, &debugger_value
);
1520 if (EQ (clause
, Qlambda
))
1522 /* We can't return values to code which signaled an error, but we
1523 can continue code which has signaled a quit. */
1524 if (EQ (real_error_symbol
, Qquit
))
1527 error ("Cannot return from the debugger in an error");
1532 Lisp_Object unwind_data
;
1533 struct handler
*h
= handlerlist
;
1535 handlerlist
= allhandlers
;
1537 if (NILP (error_symbol
))
1540 unwind_data
= Fcons (error_symbol
, data
);
1541 h
->chosen_clause
= clause
;
1542 unwind_to_catch (h
->tag
, unwind_data
);
1546 handlerlist
= allhandlers
;
1547 /* If no handler is present now, try to run the debugger,
1548 and if that fails, throw to top level. */
1549 find_handler_clause (Qerror
, conditions
, error_symbol
, data
, &debugger_value
);
1551 Fthrow (Qtop_level
, Qt
);
1553 if (! NILP (error_symbol
))
1554 data
= Fcons (error_symbol
, data
);
1556 string
= Ferror_message_string (data
);
1557 fatal ("%s", SDATA (string
), 0);
1560 /* Return nonzero iff LIST is a non-nil atom or
1561 a list containing one of CONDITIONS. */
1564 wants_debugger (list
, conditions
)
1565 Lisp_Object list
, conditions
;
1572 while (CONSP (conditions
))
1574 Lisp_Object
this, tail
;
1575 this = XCAR (conditions
);
1576 for (tail
= list
; CONSP (tail
); tail
= XCDR (tail
))
1577 if (EQ (XCAR (tail
), this))
1579 conditions
= XCDR (conditions
);
1584 /* Return 1 if an error with condition-symbols CONDITIONS,
1585 and described by SIGNAL-DATA, should skip the debugger
1586 according to debugger-ignored-errors. */
1589 skip_debugger (conditions
, data
)
1590 Lisp_Object conditions
, data
;
1593 int first_string
= 1;
1594 Lisp_Object error_message
;
1596 error_message
= Qnil
;
1597 for (tail
= Vdebug_ignored_errors
; CONSP (tail
); tail
= XCDR (tail
))
1599 if (STRINGP (XCAR (tail
)))
1603 error_message
= Ferror_message_string (data
);
1607 if (fast_string_match (XCAR (tail
), error_message
) >= 0)
1612 Lisp_Object contail
;
1614 for (contail
= conditions
; CONSP (contail
); contail
= XCDR (contail
))
1615 if (EQ (XCAR (tail
), XCAR (contail
)))
1623 /* Value of Qlambda means we have called debugger and user has continued.
1624 There are two ways to pass SIG and DATA:
1625 = SIG is the error symbol, and DATA is the rest of the data.
1626 = SIG is nil, and DATA is (SYMBOL . REST-OF-DATA).
1627 This is for memory-full errors only.
1629 Store value returned from debugger into *DEBUGGER_VALUE_PTR. */
1632 find_handler_clause (handlers
, conditions
, sig
, data
, debugger_value_ptr
)
1633 Lisp_Object handlers
, conditions
, sig
, data
;
1634 Lisp_Object
*debugger_value_ptr
;
1636 register Lisp_Object h
;
1637 register Lisp_Object tem
;
1639 if (EQ (handlers
, Qt
)) /* t is used by handlers for all conditions, set up by C code. */
1641 /* error is used similarly, but means print an error message
1642 and run the debugger if that is enabled. */
1643 if (EQ (handlers
, Qerror
)
1644 || !NILP (Vdebug_on_signal
)) /* This says call debugger even if
1645 there is a handler. */
1647 int count
= SPECPDL_INDEX ();
1648 int debugger_called
= 0;
1649 Lisp_Object sig_symbol
, combined_data
;
1650 /* This is set to 1 if we are handling a memory-full error,
1651 because these must not run the debugger.
1652 (There is no room in memory to do that!) */
1653 int no_debugger
= 0;
1657 combined_data
= data
;
1658 sig_symbol
= Fcar (data
);
1663 combined_data
= Fcons (sig
, data
);
1667 if (wants_debugger (Vstack_trace_on_error
, conditions
))
1670 internal_with_output_to_temp_buffer ("*Backtrace*",
1671 (Lisp_Object (*) (Lisp_Object
)) Fbacktrace
,
1674 internal_with_output_to_temp_buffer ("*Backtrace*",
1679 && (EQ (sig_symbol
, Qquit
)
1681 : wants_debugger (Vdebug_on_error
, conditions
))
1682 && ! skip_debugger (conditions
, combined_data
)
1683 && when_entered_debugger
< num_nonmacro_input_events
)
1685 specbind (Qdebug_on_error
, Qnil
);
1687 = call_debugger (Fcons (Qerror
,
1688 Fcons (combined_data
, Qnil
)));
1689 debugger_called
= 1;
1691 /* If there is no handler, return saying whether we ran the debugger. */
1692 if (EQ (handlers
, Qerror
))
1694 if (debugger_called
)
1695 return unbind_to (count
, Qlambda
);
1699 for (h
= handlers
; CONSP (h
); h
= Fcdr (h
))
1701 Lisp_Object handler
, condit
;
1704 if (!CONSP (handler
))
1706 condit
= Fcar (handler
);
1707 /* Handle a single condition name in handler HANDLER. */
1708 if (SYMBOLP (condit
))
1710 tem
= Fmemq (Fcar (handler
), conditions
);
1714 /* Handle a list of condition names in handler HANDLER. */
1715 else if (CONSP (condit
))
1717 while (CONSP (condit
))
1719 tem
= Fmemq (Fcar (condit
), conditions
);
1722 condit
= XCDR (condit
);
1729 /* dump an error message; called like printf */
1733 error (m
, a1
, a2
, a3
)
1753 int used
= doprnt (buffer
, size
, m
, m
+ mlen
, 3, args
);
1758 buffer
= (char *) xrealloc (buffer
, size
);
1761 buffer
= (char *) xmalloc (size
);
1766 string
= build_string (buffer
);
1770 Fsignal (Qerror
, Fcons (string
, Qnil
));
1774 DEFUN ("commandp", Fcommandp
, Scommandp
, 1, 2, 0,
1775 doc
: /* Non-nil if FUNCTION makes provisions for interactive calling.
1776 This means it contains a description for how to read arguments to give it.
1777 The value is nil for an invalid function or a symbol with no function
1780 Interactively callable functions include strings and vectors (treated
1781 as keyboard macros), lambda-expressions that contain a top-level call
1782 to `interactive', autoload definitions made by `autoload' with non-nil
1783 fourth argument, and some of the built-in functions of Lisp.
1785 Also, a symbol satisfies `commandp' if its function definition does so.
1787 If the optional argument FOR-CALL-INTERACTIVELY is non-nil,
1788 then strings and vectors are not accepted. */)
1789 (function
, for_call_interactively
)
1790 Lisp_Object function
, for_call_interactively
;
1792 register Lisp_Object fun
;
1793 register Lisp_Object funcar
;
1797 fun
= indirect_function (fun
);
1798 if (EQ (fun
, Qunbound
))
1801 /* Emacs primitives are interactive if their DEFUN specifies an
1802 interactive spec. */
1805 if (XSUBR (fun
)->prompt
)
1811 /* Bytecode objects are interactive if they are long enough to
1812 have an element whose index is COMPILED_INTERACTIVE, which is
1813 where the interactive spec is stored. */
1814 else if (COMPILEDP (fun
))
1815 return ((ASIZE (fun
) & PSEUDOVECTOR_SIZE_MASK
) > COMPILED_INTERACTIVE
1818 /* Strings and vectors are keyboard macros. */
1819 if (NILP (for_call_interactively
) && (STRINGP (fun
) || VECTORP (fun
)))
1822 /* Lists may represent commands. */
1825 funcar
= Fcar (fun
);
1826 if (!SYMBOLP (funcar
))
1827 return Fsignal (Qinvalid_function
, Fcons (fun
, Qnil
));
1828 if (EQ (funcar
, Qlambda
))
1829 return Fassq (Qinteractive
, Fcdr (Fcdr (fun
)));
1830 if (EQ (funcar
, Qautoload
))
1831 return Fcar (Fcdr (Fcdr (Fcdr (fun
))));
1837 DEFUN ("autoload", Fautoload
, Sautoload
, 2, 5, 0,
1838 doc
: /* Define FUNCTION to autoload from FILE.
1839 FUNCTION is a symbol; FILE is a file name string to pass to `load'.
1840 Third arg DOCSTRING is documentation for the function.
1841 Fourth arg INTERACTIVE if non-nil says function can be called interactively.
1842 Fifth arg TYPE indicates the type of the object:
1843 nil or omitted says FUNCTION is a function,
1844 `keymap' says FUNCTION is really a keymap, and
1845 `macro' or t says FUNCTION is really a macro.
1846 Third through fifth args give info about the real definition.
1847 They default to nil.
1848 If FUNCTION is already defined other than as an autoload,
1849 this does nothing and returns nil. */)
1850 (function
, file
, docstring
, interactive
, type
)
1851 Lisp_Object function
, file
, docstring
, interactive
, type
;
1854 Lisp_Object args
[4];
1857 CHECK_SYMBOL (function
);
1858 CHECK_STRING (file
);
1860 /* If function is defined and not as an autoload, don't override */
1861 if (!EQ (XSYMBOL (function
)->function
, Qunbound
)
1862 && !(CONSP (XSYMBOL (function
)->function
)
1863 && EQ (XCAR (XSYMBOL (function
)->function
), Qautoload
)))
1866 if (NILP (Vpurify_flag
))
1867 /* Only add entries after dumping, because the ones before are
1868 not useful and else we get loads of them from the loaddefs.el. */
1869 LOADHIST_ATTACH (Fcons (Qautoload
, function
));
1873 args
[1] = docstring
;
1874 args
[2] = interactive
;
1877 return Ffset (function
, Fcons (Qautoload
, Flist (4, &args
[0])));
1878 #else /* NO_ARG_ARRAY */
1879 return Ffset (function
, Fcons (Qautoload
, Flist (4, &file
)));
1880 #endif /* not NO_ARG_ARRAY */
1884 un_autoload (oldqueue
)
1885 Lisp_Object oldqueue
;
1887 register Lisp_Object queue
, first
, second
;
1889 /* Queue to unwind is current value of Vautoload_queue.
1890 oldqueue is the shadowed value to leave in Vautoload_queue. */
1891 queue
= Vautoload_queue
;
1892 Vautoload_queue
= oldqueue
;
1893 while (CONSP (queue
))
1895 first
= Fcar (queue
);
1896 second
= Fcdr (first
);
1897 first
= Fcar (first
);
1898 if (EQ (second
, Qnil
))
1901 Ffset (first
, second
);
1902 queue
= Fcdr (queue
);
1907 /* Load an autoloaded function.
1908 FUNNAME is the symbol which is the function's name.
1909 FUNDEF is the autoload definition (a list). */
1912 do_autoload (fundef
, funname
)
1913 Lisp_Object fundef
, funname
;
1915 int count
= SPECPDL_INDEX ();
1916 Lisp_Object fun
, queue
, first
, second
;
1917 struct gcpro gcpro1
, gcpro2
, gcpro3
;
1919 /* This is to make sure that loadup.el gives a clear picture
1920 of what files are preloaded and when. */
1921 if (! NILP (Vpurify_flag
))
1922 error ("Attempt to autoload %s while preparing to dump",
1923 SDATA (SYMBOL_NAME (funname
)));
1926 CHECK_SYMBOL (funname
);
1927 GCPRO3 (fun
, funname
, fundef
);
1929 /* Preserve the match data. */
1930 record_unwind_protect (Fset_match_data
, Fmatch_data (Qnil
, Qnil
));
1932 /* Value saved here is to be restored into Vautoload_queue. */
1933 record_unwind_protect (un_autoload
, Vautoload_queue
);
1934 Vautoload_queue
= Qt
;
1935 Fload (Fcar (Fcdr (fundef
)), Qnil
, noninteractive
? Qt
: Qnil
, Qnil
, Qt
);
1937 /* Save the old autoloads, in case we ever do an unload. */
1938 queue
= Vautoload_queue
;
1939 while (CONSP (queue
))
1941 first
= Fcar (queue
);
1942 second
= Fcdr (first
);
1943 first
= Fcar (first
);
1945 /* Note: This test is subtle. The cdr of an autoload-queue entry
1946 may be an atom if the autoload entry was generated by a defalias
1949 Fput (first
, Qautoload
, (Fcdr (second
)));
1951 queue
= Fcdr (queue
);
1954 /* Once loading finishes, don't undo it. */
1955 Vautoload_queue
= Qt
;
1956 unbind_to (count
, Qnil
);
1958 fun
= Findirect_function (fun
);
1960 if (!NILP (Fequal (fun
, fundef
)))
1961 error ("Autoloading failed to define function %s",
1962 SDATA (SYMBOL_NAME (funname
)));
1967 DEFUN ("eval", Feval
, Seval
, 1, 1, 0,
1968 doc
: /* Evaluate FORM and return its value. */)
1972 Lisp_Object fun
, val
, original_fun
, original_args
;
1974 struct backtrace backtrace
;
1975 struct gcpro gcpro1
, gcpro2
, gcpro3
;
1977 if (handling_signal
)
1981 return Fsymbol_value (form
);
1986 if (consing_since_gc
> gc_cons_threshold
)
1989 Fgarbage_collect ();
1993 if (++lisp_eval_depth
> max_lisp_eval_depth
)
1995 if (max_lisp_eval_depth
< 100)
1996 max_lisp_eval_depth
= 100;
1997 if (lisp_eval_depth
> max_lisp_eval_depth
)
1998 error ("Lisp nesting exceeds max-lisp-eval-depth");
2001 original_fun
= Fcar (form
);
2002 original_args
= Fcdr (form
);
2004 backtrace
.next
= backtrace_list
;
2005 backtrace_list
= &backtrace
;
2006 backtrace
.function
= &original_fun
; /* This also protects them from gc */
2007 backtrace
.args
= &original_args
;
2008 backtrace
.nargs
= UNEVALLED
;
2009 backtrace
.evalargs
= 1;
2010 backtrace
.debug_on_exit
= 0;
2012 if (debug_on_next_call
)
2013 do_debug_on_call (Qt
);
2015 /* At this point, only original_fun and original_args
2016 have values that will be used below */
2018 fun
= Findirect_function (original_fun
);
2022 Lisp_Object numargs
;
2023 Lisp_Object argvals
[8];
2024 Lisp_Object args_left
;
2025 register int i
, maxargs
;
2027 args_left
= original_args
;
2028 numargs
= Flength (args_left
);
2030 if (XINT (numargs
) < XSUBR (fun
)->min_args
||
2031 (XSUBR (fun
)->max_args
>= 0 && XSUBR (fun
)->max_args
< XINT (numargs
)))
2032 return Fsignal (Qwrong_number_of_arguments
, Fcons (fun
, Fcons (numargs
, Qnil
)));
2034 if (XSUBR (fun
)->max_args
== UNEVALLED
)
2036 backtrace
.evalargs
= 0;
2037 val
= (*XSUBR (fun
)->function
) (args_left
);
2041 if (XSUBR (fun
)->max_args
== MANY
)
2043 /* Pass a vector of evaluated arguments */
2045 register int argnum
= 0;
2047 vals
= (Lisp_Object
*) alloca (XINT (numargs
) * sizeof (Lisp_Object
));
2049 GCPRO3 (args_left
, fun
, fun
);
2053 while (!NILP (args_left
))
2055 vals
[argnum
++] = Feval (Fcar (args_left
));
2056 args_left
= Fcdr (args_left
);
2057 gcpro3
.nvars
= argnum
;
2060 backtrace
.args
= vals
;
2061 backtrace
.nargs
= XINT (numargs
);
2063 val
= (*XSUBR (fun
)->function
) (XINT (numargs
), vals
);
2068 GCPRO3 (args_left
, fun
, fun
);
2069 gcpro3
.var
= argvals
;
2072 maxargs
= XSUBR (fun
)->max_args
;
2073 for (i
= 0; i
< maxargs
; args_left
= Fcdr (args_left
))
2075 argvals
[i
] = Feval (Fcar (args_left
));
2081 backtrace
.args
= argvals
;
2082 backtrace
.nargs
= XINT (numargs
);
2087 val
= (*XSUBR (fun
)->function
) ();
2090 val
= (*XSUBR (fun
)->function
) (argvals
[0]);
2093 val
= (*XSUBR (fun
)->function
) (argvals
[0], argvals
[1]);
2096 val
= (*XSUBR (fun
)->function
) (argvals
[0], argvals
[1],
2100 val
= (*XSUBR (fun
)->function
) (argvals
[0], argvals
[1],
2101 argvals
[2], argvals
[3]);
2104 val
= (*XSUBR (fun
)->function
) (argvals
[0], argvals
[1], argvals
[2],
2105 argvals
[3], argvals
[4]);
2108 val
= (*XSUBR (fun
)->function
) (argvals
[0], argvals
[1], argvals
[2],
2109 argvals
[3], argvals
[4], argvals
[5]);
2112 val
= (*XSUBR (fun
)->function
) (argvals
[0], argvals
[1], argvals
[2],
2113 argvals
[3], argvals
[4], argvals
[5],
2118 val
= (*XSUBR (fun
)->function
) (argvals
[0], argvals
[1], argvals
[2],
2119 argvals
[3], argvals
[4], argvals
[5],
2120 argvals
[6], argvals
[7]);
2124 /* Someone has created a subr that takes more arguments than
2125 is supported by this code. We need to either rewrite the
2126 subr to use a different argument protocol, or add more
2127 cases to this switch. */
2131 if (COMPILEDP (fun
))
2132 val
= apply_lambda (fun
, original_args
, 1);
2136 return Fsignal (Qinvalid_function
, Fcons (fun
, Qnil
));
2137 funcar
= Fcar (fun
);
2138 if (!SYMBOLP (funcar
))
2139 return Fsignal (Qinvalid_function
, Fcons (fun
, Qnil
));
2140 if (EQ (funcar
, Qautoload
))
2142 do_autoload (fun
, original_fun
);
2145 if (EQ (funcar
, Qmacro
))
2146 val
= Feval (apply1 (Fcdr (fun
), original_args
));
2147 else if (EQ (funcar
, Qlambda
))
2148 val
= apply_lambda (fun
, original_args
, 1);
2150 return Fsignal (Qinvalid_function
, Fcons (fun
, Qnil
));
2154 if (backtrace
.debug_on_exit
)
2155 val
= call_debugger (Fcons (Qexit
, Fcons (val
, Qnil
)));
2156 backtrace_list
= backtrace
.next
;
2160 DEFUN ("apply", Fapply
, Sapply
, 2, MANY
, 0,
2161 doc
: /* Call FUNCTION with our remaining args, using our last arg as list of args.
2162 Then return the value FUNCTION returns.
2163 Thus, (apply '+ 1 2 '(3 4)) returns 10.
2164 usage: (apply FUNCTION &rest ARGUMENTS) */)
2169 register int i
, numargs
;
2170 register Lisp_Object spread_arg
;
2171 register Lisp_Object
*funcall_args
;
2173 struct gcpro gcpro1
;
2177 spread_arg
= args
[nargs
- 1];
2178 CHECK_LIST (spread_arg
);
2180 numargs
= XINT (Flength (spread_arg
));
2183 return Ffuncall (nargs
- 1, args
);
2184 else if (numargs
== 1)
2186 args
[nargs
- 1] = XCAR (spread_arg
);
2187 return Ffuncall (nargs
, args
);
2190 numargs
+= nargs
- 2;
2192 fun
= indirect_function (fun
);
2193 if (EQ (fun
, Qunbound
))
2195 /* Let funcall get the error */
2202 if (numargs
< XSUBR (fun
)->min_args
2203 || (XSUBR (fun
)->max_args
>= 0 && XSUBR (fun
)->max_args
< numargs
))
2204 goto funcall
; /* Let funcall get the error */
2205 else if (XSUBR (fun
)->max_args
> numargs
)
2207 /* Avoid making funcall cons up a yet another new vector of arguments
2208 by explicitly supplying nil's for optional values */
2209 funcall_args
= (Lisp_Object
*) alloca ((1 + XSUBR (fun
)->max_args
)
2210 * sizeof (Lisp_Object
));
2211 for (i
= numargs
; i
< XSUBR (fun
)->max_args
;)
2212 funcall_args
[++i
] = Qnil
;
2213 GCPRO1 (*funcall_args
);
2214 gcpro1
.nvars
= 1 + XSUBR (fun
)->max_args
;
2218 /* We add 1 to numargs because funcall_args includes the
2219 function itself as well as its arguments. */
2222 funcall_args
= (Lisp_Object
*) alloca ((1 + numargs
)
2223 * sizeof (Lisp_Object
));
2224 GCPRO1 (*funcall_args
);
2225 gcpro1
.nvars
= 1 + numargs
;
2228 bcopy (args
, funcall_args
, nargs
* sizeof (Lisp_Object
));
2229 /* Spread the last arg we got. Its first element goes in
2230 the slot that it used to occupy, hence this value of I. */
2232 while (!NILP (spread_arg
))
2234 funcall_args
[i
++] = XCAR (spread_arg
);
2235 spread_arg
= XCDR (spread_arg
);
2238 RETURN_UNGCPRO (Ffuncall (gcpro1
.nvars
, funcall_args
));
2241 /* Run hook variables in various ways. */
2243 enum run_hooks_condition
{to_completion
, until_success
, until_failure
};
2244 static Lisp_Object run_hook_with_args
P_ ((int, Lisp_Object
*,
2245 enum run_hooks_condition
));
2247 DEFUN ("run-hooks", Frun_hooks
, Srun_hooks
, 0, MANY
, 0,
2248 doc
: /* Run each hook in HOOKS. Major mode functions use this.
2249 Each argument should be a symbol, a hook variable.
2250 These symbols are processed in the order specified.
2251 If a hook symbol has a non-nil value, that value may be a function
2252 or a list of functions to be called to run the hook.
2253 If the value is a function, it is called with no arguments.
2254 If it is a list, the elements are called, in order, with no arguments.
2256 Do not use `make-local-variable' to make a hook variable buffer-local.
2257 Instead, use `add-hook' and specify t for the LOCAL argument.
2258 usage: (run-hooks &rest HOOKS) */)
2263 Lisp_Object hook
[1];
2266 for (i
= 0; i
< nargs
; i
++)
2269 run_hook_with_args (1, hook
, to_completion
);
2275 DEFUN ("run-hook-with-args", Frun_hook_with_args
,
2276 Srun_hook_with_args
, 1, MANY
, 0,
2277 doc
: /* Run HOOK with the specified arguments ARGS.
2278 HOOK should be a symbol, a hook variable. If HOOK has a non-nil
2279 value, that value may be a function or a list of functions to be
2280 called to run the hook. If the value is a function, it is called with
2281 the given arguments and its return value is returned. If it is a list
2282 of functions, those functions are called, in order,
2283 with the given arguments ARGS.
2284 It is best not to depend on the value return by `run-hook-with-args',
2287 Do not use `make-local-variable' to make a hook variable buffer-local.
2288 Instead, use `add-hook' and specify t for the LOCAL argument.
2289 usage: (run-hook-with-args HOOK &rest ARGS) */)
2294 return run_hook_with_args (nargs
, args
, to_completion
);
2297 DEFUN ("run-hook-with-args-until-success", Frun_hook_with_args_until_success
,
2298 Srun_hook_with_args_until_success
, 1, MANY
, 0,
2299 doc
: /* Run HOOK with the specified arguments ARGS.
2300 HOOK should be a symbol, a hook variable. Its value should
2301 be a list of functions. We call those functions, one by one,
2302 passing arguments ARGS to each of them, until one of them
2303 returns a non-nil value. Then we return that value.
2304 If all the functions return nil, we return nil.
2306 Do not use `make-local-variable' to make a hook variable buffer-local.
2307 Instead, use `add-hook' and specify t for the LOCAL argument.
2308 usage: (run-hook-with-args-until-success HOOK &rest ARGS) */)
2313 return run_hook_with_args (nargs
, args
, until_success
);
2316 DEFUN ("run-hook-with-args-until-failure", Frun_hook_with_args_until_failure
,
2317 Srun_hook_with_args_until_failure
, 1, MANY
, 0,
2318 doc
: /* Run HOOK with the specified arguments ARGS.
2319 HOOK should be a symbol, a hook variable. Its value should
2320 be a list of functions. We call those functions, one by one,
2321 passing arguments ARGS to each of them, until one of them
2322 returns nil. Then we return nil.
2323 If all the functions return non-nil, we return non-nil.
2325 Do not use `make-local-variable' to make a hook variable buffer-local.
2326 Instead, use `add-hook' and specify t for the LOCAL argument.
2327 usage: (run-hook-with-args-until-failure HOOK &rest ARGS) */)
2332 return run_hook_with_args (nargs
, args
, until_failure
);
2335 /* ARGS[0] should be a hook symbol.
2336 Call each of the functions in the hook value, passing each of them
2337 as arguments all the rest of ARGS (all NARGS - 1 elements).
2338 COND specifies a condition to test after each call
2339 to decide whether to stop.
2340 The caller (or its caller, etc) must gcpro all of ARGS,
2341 except that it isn't necessary to gcpro ARGS[0]. */
2344 run_hook_with_args (nargs
, args
, cond
)
2347 enum run_hooks_condition cond
;
2349 Lisp_Object sym
, val
, ret
;
2350 Lisp_Object globals
;
2351 struct gcpro gcpro1
, gcpro2
, gcpro3
;
2353 /* If we are dying or still initializing,
2354 don't do anything--it would probably crash if we tried. */
2355 if (NILP (Vrun_hooks
))
2359 val
= find_symbol_value (sym
);
2360 ret
= (cond
== until_failure
? Qt
: Qnil
);
2362 if (EQ (val
, Qunbound
) || NILP (val
))
2364 else if (!CONSP (val
) || EQ (XCAR (val
), Qlambda
))
2367 return Ffuncall (nargs
, args
);
2372 GCPRO3 (sym
, val
, globals
);
2375 CONSP (val
) && ((cond
== to_completion
)
2376 || (cond
== until_success
? NILP (ret
)
2380 if (EQ (XCAR (val
), Qt
))
2382 /* t indicates this hook has a local binding;
2383 it means to run the global binding too. */
2385 for (globals
= Fdefault_value (sym
);
2386 CONSP (globals
) && ((cond
== to_completion
)
2387 || (cond
== until_success
? NILP (ret
)
2389 globals
= XCDR (globals
))
2391 args
[0] = XCAR (globals
);
2392 /* In a global value, t should not occur. If it does, we
2393 must ignore it to avoid an endless loop. */
2394 if (!EQ (args
[0], Qt
))
2395 ret
= Ffuncall (nargs
, args
);
2400 args
[0] = XCAR (val
);
2401 ret
= Ffuncall (nargs
, args
);
2410 /* Run a hook symbol ARGS[0], but use FUNLIST instead of the actual
2411 present value of that symbol.
2412 Call each element of FUNLIST,
2413 passing each of them the rest of ARGS.
2414 The caller (or its caller, etc) must gcpro all of ARGS,
2415 except that it isn't necessary to gcpro ARGS[0]. */
2418 run_hook_list_with_args (funlist
, nargs
, args
)
2419 Lisp_Object funlist
;
2425 Lisp_Object globals
;
2426 struct gcpro gcpro1
, gcpro2
, gcpro3
;
2430 GCPRO3 (sym
, val
, globals
);
2432 for (val
= funlist
; CONSP (val
); val
= XCDR (val
))
2434 if (EQ (XCAR (val
), Qt
))
2436 /* t indicates this hook has a local binding;
2437 it means to run the global binding too. */
2439 for (globals
= Fdefault_value (sym
);
2441 globals
= XCDR (globals
))
2443 args
[0] = XCAR (globals
);
2444 /* In a global value, t should not occur. If it does, we
2445 must ignore it to avoid an endless loop. */
2446 if (!EQ (args
[0], Qt
))
2447 Ffuncall (nargs
, args
);
2452 args
[0] = XCAR (val
);
2453 Ffuncall (nargs
, args
);
2460 /* Run the hook HOOK, giving each function the two args ARG1 and ARG2. */
2463 run_hook_with_args_2 (hook
, arg1
, arg2
)
2464 Lisp_Object hook
, arg1
, arg2
;
2466 Lisp_Object temp
[3];
2471 Frun_hook_with_args (3, temp
);
2474 /* Apply fn to arg */
2477 Lisp_Object fn
, arg
;
2479 struct gcpro gcpro1
;
2483 RETURN_UNGCPRO (Ffuncall (1, &fn
));
2487 Lisp_Object args
[2];
2491 RETURN_UNGCPRO (Fapply (2, args
));
2493 #else /* not NO_ARG_ARRAY */
2494 RETURN_UNGCPRO (Fapply (2, &fn
));
2495 #endif /* not NO_ARG_ARRAY */
2498 /* Call function fn on no arguments */
2503 struct gcpro gcpro1
;
2506 RETURN_UNGCPRO (Ffuncall (1, &fn
));
2509 /* Call function fn with 1 argument arg1 */
2513 Lisp_Object fn
, arg1
;
2515 struct gcpro gcpro1
;
2517 Lisp_Object args
[2];
2523 RETURN_UNGCPRO (Ffuncall (2, args
));
2524 #else /* not NO_ARG_ARRAY */
2527 RETURN_UNGCPRO (Ffuncall (2, &fn
));
2528 #endif /* not NO_ARG_ARRAY */
2531 /* Call function fn with 2 arguments arg1, arg2 */
2534 call2 (fn
, arg1
, arg2
)
2535 Lisp_Object fn
, arg1
, arg2
;
2537 struct gcpro gcpro1
;
2539 Lisp_Object args
[3];
2545 RETURN_UNGCPRO (Ffuncall (3, args
));
2546 #else /* not NO_ARG_ARRAY */
2549 RETURN_UNGCPRO (Ffuncall (3, &fn
));
2550 #endif /* not NO_ARG_ARRAY */
2553 /* Call function fn with 3 arguments arg1, arg2, arg3 */
2556 call3 (fn
, arg1
, arg2
, arg3
)
2557 Lisp_Object fn
, arg1
, arg2
, arg3
;
2559 struct gcpro gcpro1
;
2561 Lisp_Object args
[4];
2568 RETURN_UNGCPRO (Ffuncall (4, args
));
2569 #else /* not NO_ARG_ARRAY */
2572 RETURN_UNGCPRO (Ffuncall (4, &fn
));
2573 #endif /* not NO_ARG_ARRAY */
2576 /* Call function fn with 4 arguments arg1, arg2, arg3, arg4 */
2579 call4 (fn
, arg1
, arg2
, arg3
, arg4
)
2580 Lisp_Object fn
, arg1
, arg2
, arg3
, arg4
;
2582 struct gcpro gcpro1
;
2584 Lisp_Object args
[5];
2592 RETURN_UNGCPRO (Ffuncall (5, args
));
2593 #else /* not NO_ARG_ARRAY */
2596 RETURN_UNGCPRO (Ffuncall (5, &fn
));
2597 #endif /* not NO_ARG_ARRAY */
2600 /* Call function fn with 5 arguments arg1, arg2, arg3, arg4, arg5 */
2603 call5 (fn
, arg1
, arg2
, arg3
, arg4
, arg5
)
2604 Lisp_Object fn
, arg1
, arg2
, arg3
, arg4
, arg5
;
2606 struct gcpro gcpro1
;
2608 Lisp_Object args
[6];
2617 RETURN_UNGCPRO (Ffuncall (6, args
));
2618 #else /* not NO_ARG_ARRAY */
2621 RETURN_UNGCPRO (Ffuncall (6, &fn
));
2622 #endif /* not NO_ARG_ARRAY */
2625 /* Call function fn with 6 arguments arg1, arg2, arg3, arg4, arg5, arg6 */
2628 call6 (fn
, arg1
, arg2
, arg3
, arg4
, arg5
, arg6
)
2629 Lisp_Object fn
, arg1
, arg2
, arg3
, arg4
, arg5
, arg6
;
2631 struct gcpro gcpro1
;
2633 Lisp_Object args
[7];
2643 RETURN_UNGCPRO (Ffuncall (7, args
));
2644 #else /* not NO_ARG_ARRAY */
2647 RETURN_UNGCPRO (Ffuncall (7, &fn
));
2648 #endif /* not NO_ARG_ARRAY */
2651 DEFUN ("funcall", Ffuncall
, Sfuncall
, 1, MANY
, 0,
2652 doc
: /* Call first argument as a function, passing remaining arguments to it.
2653 Return the value that function returns.
2654 Thus, (funcall 'cons 'x 'y) returns (x . y).
2655 usage: (funcall FUNCTION &rest ARGUMENTS) */)
2662 int numargs
= nargs
- 1;
2663 Lisp_Object lisp_numargs
;
2665 struct backtrace backtrace
;
2666 register Lisp_Object
*internal_args
;
2670 if (consing_since_gc
> gc_cons_threshold
)
2671 Fgarbage_collect ();
2673 if (++lisp_eval_depth
> max_lisp_eval_depth
)
2675 if (max_lisp_eval_depth
< 100)
2676 max_lisp_eval_depth
= 100;
2677 if (lisp_eval_depth
> max_lisp_eval_depth
)
2678 error ("Lisp nesting exceeds max-lisp-eval-depth");
2681 backtrace
.next
= backtrace_list
;
2682 backtrace_list
= &backtrace
;
2683 backtrace
.function
= &args
[0];
2684 backtrace
.args
= &args
[1];
2685 backtrace
.nargs
= nargs
- 1;
2686 backtrace
.evalargs
= 0;
2687 backtrace
.debug_on_exit
= 0;
2689 if (debug_on_next_call
)
2690 do_debug_on_call (Qlambda
);
2696 fun
= Findirect_function (fun
);
2700 if (numargs
< XSUBR (fun
)->min_args
2701 || (XSUBR (fun
)->max_args
>= 0 && XSUBR (fun
)->max_args
< numargs
))
2703 XSETFASTINT (lisp_numargs
, numargs
);
2704 return Fsignal (Qwrong_number_of_arguments
, Fcons (fun
, Fcons (lisp_numargs
, Qnil
)));
2707 if (XSUBR (fun
)->max_args
== UNEVALLED
)
2708 return Fsignal (Qinvalid_function
, Fcons (fun
, Qnil
));
2710 if (XSUBR (fun
)->max_args
== MANY
)
2712 val
= (*XSUBR (fun
)->function
) (numargs
, args
+ 1);
2716 if (XSUBR (fun
)->max_args
> numargs
)
2718 internal_args
= (Lisp_Object
*) alloca (XSUBR (fun
)->max_args
* sizeof (Lisp_Object
));
2719 bcopy (args
+ 1, internal_args
, numargs
* sizeof (Lisp_Object
));
2720 for (i
= numargs
; i
< XSUBR (fun
)->max_args
; i
++)
2721 internal_args
[i
] = Qnil
;
2724 internal_args
= args
+ 1;
2725 switch (XSUBR (fun
)->max_args
)
2728 val
= (*XSUBR (fun
)->function
) ();
2731 val
= (*XSUBR (fun
)->function
) (internal_args
[0]);
2734 val
= (*XSUBR (fun
)->function
) (internal_args
[0],
2738 val
= (*XSUBR (fun
)->function
) (internal_args
[0], internal_args
[1],
2742 val
= (*XSUBR (fun
)->function
) (internal_args
[0], internal_args
[1],
2747 val
= (*XSUBR (fun
)->function
) (internal_args
[0], internal_args
[1],
2748 internal_args
[2], internal_args
[3],
2752 val
= (*XSUBR (fun
)->function
) (internal_args
[0], internal_args
[1],
2753 internal_args
[2], internal_args
[3],
2754 internal_args
[4], internal_args
[5]);
2757 val
= (*XSUBR (fun
)->function
) (internal_args
[0], internal_args
[1],
2758 internal_args
[2], internal_args
[3],
2759 internal_args
[4], internal_args
[5],
2764 val
= (*XSUBR (fun
)->function
) (internal_args
[0], internal_args
[1],
2765 internal_args
[2], internal_args
[3],
2766 internal_args
[4], internal_args
[5],
2767 internal_args
[6], internal_args
[7]);
2772 /* If a subr takes more than 8 arguments without using MANY
2773 or UNEVALLED, we need to extend this function to support it.
2774 Until this is done, there is no way to call the function. */
2778 if (COMPILEDP (fun
))
2779 val
= funcall_lambda (fun
, numargs
, args
+ 1);
2783 return Fsignal (Qinvalid_function
, Fcons (fun
, Qnil
));
2784 funcar
= Fcar (fun
);
2785 if (!SYMBOLP (funcar
))
2786 return Fsignal (Qinvalid_function
, Fcons (fun
, Qnil
));
2787 if (EQ (funcar
, Qlambda
))
2788 val
= funcall_lambda (fun
, numargs
, args
+ 1);
2789 else if (EQ (funcar
, Qautoload
))
2791 do_autoload (fun
, args
[0]);
2795 return Fsignal (Qinvalid_function
, Fcons (fun
, Qnil
));
2799 if (backtrace
.debug_on_exit
)
2800 val
= call_debugger (Fcons (Qexit
, Fcons (val
, Qnil
)));
2801 backtrace_list
= backtrace
.next
;
2806 apply_lambda (fun
, args
, eval_flag
)
2807 Lisp_Object fun
, args
;
2810 Lisp_Object args_left
;
2811 Lisp_Object numargs
;
2812 register Lisp_Object
*arg_vector
;
2813 struct gcpro gcpro1
, gcpro2
, gcpro3
;
2815 register Lisp_Object tem
;
2817 numargs
= Flength (args
);
2818 arg_vector
= (Lisp_Object
*) alloca (XINT (numargs
) * sizeof (Lisp_Object
));
2821 GCPRO3 (*arg_vector
, args_left
, fun
);
2824 for (i
= 0; i
< XINT (numargs
);)
2826 tem
= Fcar (args_left
), args_left
= Fcdr (args_left
);
2827 if (eval_flag
) tem
= Feval (tem
);
2828 arg_vector
[i
++] = tem
;
2836 backtrace_list
->args
= arg_vector
;
2837 backtrace_list
->nargs
= i
;
2839 backtrace_list
->evalargs
= 0;
2840 tem
= funcall_lambda (fun
, XINT (numargs
), arg_vector
);
2842 /* Do the debug-on-exit now, while arg_vector still exists. */
2843 if (backtrace_list
->debug_on_exit
)
2844 tem
= call_debugger (Fcons (Qexit
, Fcons (tem
, Qnil
)));
2845 /* Don't do it again when we return to eval. */
2846 backtrace_list
->debug_on_exit
= 0;
2850 /* Apply a Lisp function FUN to the NARGS evaluated arguments in ARG_VECTOR
2851 and return the result of evaluation.
2852 FUN must be either a lambda-expression or a compiled-code object. */
2855 funcall_lambda (fun
, nargs
, arg_vector
)
2858 register Lisp_Object
*arg_vector
;
2860 Lisp_Object val
, syms_left
, next
;
2861 int count
= SPECPDL_INDEX ();
2862 int i
, optional
, rest
;
2866 syms_left
= XCDR (fun
);
2867 if (CONSP (syms_left
))
2868 syms_left
= XCAR (syms_left
);
2870 return Fsignal (Qinvalid_function
, Fcons (fun
, Qnil
));
2872 else if (COMPILEDP (fun
))
2873 syms_left
= AREF (fun
, COMPILED_ARGLIST
);
2877 i
= optional
= rest
= 0;
2878 for (; CONSP (syms_left
); syms_left
= XCDR (syms_left
))
2882 next
= XCAR (syms_left
);
2883 while (!SYMBOLP (next
))
2884 next
= Fsignal (Qinvalid_function
, Fcons (fun
, Qnil
));
2886 if (EQ (next
, Qand_rest
))
2888 else if (EQ (next
, Qand_optional
))
2892 specbind (next
, Flist (nargs
- i
, &arg_vector
[i
]));
2896 specbind (next
, arg_vector
[i
++]);
2898 return Fsignal (Qwrong_number_of_arguments
,
2899 Fcons (fun
, Fcons (make_number (nargs
), Qnil
)));
2901 specbind (next
, Qnil
);
2904 if (!NILP (syms_left
))
2905 return Fsignal (Qinvalid_function
, Fcons (fun
, Qnil
));
2907 return Fsignal (Qwrong_number_of_arguments
,
2908 Fcons (fun
, Fcons (make_number (nargs
), Qnil
)));
2911 val
= Fprogn (XCDR (XCDR (fun
)));
2914 /* If we have not actually read the bytecode string
2915 and constants vector yet, fetch them from the file. */
2916 if (CONSP (AREF (fun
, COMPILED_BYTECODE
)))
2917 Ffetch_bytecode (fun
);
2918 val
= Fbyte_code (AREF (fun
, COMPILED_BYTECODE
),
2919 AREF (fun
, COMPILED_CONSTANTS
),
2920 AREF (fun
, COMPILED_STACK_DEPTH
));
2923 return unbind_to (count
, val
);
2926 DEFUN ("fetch-bytecode", Ffetch_bytecode
, Sfetch_bytecode
,
2928 doc
: /* If byte-compiled OBJECT is lazy-loaded, fetch it now. */)
2934 if (COMPILEDP (object
) && CONSP (AREF (object
, COMPILED_BYTECODE
)))
2936 tem
= read_doc_string (AREF (object
, COMPILED_BYTECODE
));
2939 tem
= AREF (object
, COMPILED_BYTECODE
);
2940 if (CONSP (tem
) && STRINGP (XCAR (tem
)))
2941 error ("Invalid byte code in %s", SDATA (XCAR (tem
)));
2943 error ("Invalid byte code");
2945 AREF (object
, COMPILED_BYTECODE
) = XCAR (tem
);
2946 AREF (object
, COMPILED_CONSTANTS
) = XCDR (tem
);
2954 register int count
= SPECPDL_INDEX ();
2955 if (specpdl_size
>= max_specpdl_size
)
2957 if (max_specpdl_size
< 400)
2958 max_specpdl_size
= 400;
2959 if (specpdl_size
>= max_specpdl_size
)
2961 if (!NILP (Vdebug_on_error
))
2962 /* Leave room for some specpdl in the debugger. */
2963 max_specpdl_size
= specpdl_size
+ 100;
2965 Fcons (build_string ("Variable binding depth exceeds max-specpdl-size"), Qnil
));
2969 if (specpdl_size
> max_specpdl_size
)
2970 specpdl_size
= max_specpdl_size
;
2971 specpdl
= (struct specbinding
*) xrealloc (specpdl
, specpdl_size
* sizeof (struct specbinding
));
2972 specpdl_ptr
= specpdl
+ count
;
2976 specbind (symbol
, value
)
2977 Lisp_Object symbol
, value
;
2980 Lisp_Object valcontents
;
2982 CHECK_SYMBOL (symbol
);
2983 if (specpdl_ptr
== specpdl
+ specpdl_size
)
2986 /* The most common case is that of a non-constant symbol with a
2987 trivial value. Make that as fast as we can. */
2988 valcontents
= SYMBOL_VALUE (symbol
);
2989 if (!MISCP (valcontents
) && !SYMBOL_CONSTANT_P (symbol
))
2991 specpdl_ptr
->symbol
= symbol
;
2992 specpdl_ptr
->old_value
= valcontents
;
2993 specpdl_ptr
->func
= NULL
;
2995 SET_SYMBOL_VALUE (symbol
, value
);
2999 Lisp_Object valcontents
;
3001 ovalue
= find_symbol_value (symbol
);
3002 specpdl_ptr
->func
= 0;
3003 specpdl_ptr
->old_value
= ovalue
;
3005 valcontents
= XSYMBOL (symbol
)->value
;
3007 if (BUFFER_LOCAL_VALUEP (valcontents
)
3008 || SOME_BUFFER_LOCAL_VALUEP (valcontents
)
3009 || BUFFER_OBJFWDP (valcontents
))
3011 Lisp_Object where
, current_buffer
;
3013 current_buffer
= Fcurrent_buffer ();
3015 /* For a local variable, record both the symbol and which
3016 buffer's or frame's value we are saving. */
3017 if (!NILP (Flocal_variable_p (symbol
, Qnil
)))
3018 where
= current_buffer
;
3019 else if (!BUFFER_OBJFWDP (valcontents
)
3020 && XBUFFER_LOCAL_VALUE (valcontents
)->found_for_frame
)
3021 where
= XBUFFER_LOCAL_VALUE (valcontents
)->frame
;
3025 /* We're not using the `unused' slot in the specbinding
3026 structure because this would mean we have to do more
3027 work for simple variables. */
3028 specpdl_ptr
->symbol
= Fcons (symbol
, Fcons (where
, current_buffer
));
3030 /* If SYMBOL is a per-buffer variable which doesn't have a
3031 buffer-local value here, make the `let' change the global
3032 value by changing the value of SYMBOL in all buffers not
3033 having their own value. This is consistent with what
3034 happens with other buffer-local variables. */
3036 && BUFFER_OBJFWDP (valcontents
))
3039 Fset_default (symbol
, value
);
3044 specpdl_ptr
->symbol
= symbol
;
3047 if (BUFFER_OBJFWDP (ovalue
) || KBOARD_OBJFWDP (ovalue
))
3048 store_symval_forwarding (symbol
, ovalue
, value
, NULL
);
3050 set_internal (symbol
, value
, 0, 1);
3055 record_unwind_protect (function
, arg
)
3056 Lisp_Object (*function
) P_ ((Lisp_Object
));
3059 if (specpdl_ptr
== specpdl
+ specpdl_size
)
3061 specpdl_ptr
->func
= function
;
3062 specpdl_ptr
->symbol
= Qnil
;
3063 specpdl_ptr
->old_value
= arg
;
3068 unbind_to (count
, value
)
3072 int quitf
= !NILP (Vquit_flag
);
3073 struct gcpro gcpro1
;
3078 while (specpdl_ptr
!= specpdl
+ count
)
3082 if (specpdl_ptr
->func
!= 0)
3083 (*specpdl_ptr
->func
) (specpdl_ptr
->old_value
);
3084 /* Note that a "binding" of nil is really an unwind protect,
3085 so in that case the "old value" is a list of forms to evaluate. */
3086 else if (NILP (specpdl_ptr
->symbol
))
3087 Fprogn (specpdl_ptr
->old_value
);
3088 /* If the symbol is a list, it is really (SYMBOL WHERE
3089 . CURRENT-BUFFER) where WHERE is either nil, a buffer, or a
3090 frame. If WHERE is a buffer or frame, this indicates we
3091 bound a variable that had a buffer-local or frame-local
3092 binding. WHERE nil means that the variable had the default
3093 value when it was bound. CURRENT-BUFFER is the buffer that
3094 was current when the variable was bound. */
3095 else if (CONSP (specpdl_ptr
->symbol
))
3097 Lisp_Object symbol
, where
;
3099 symbol
= XCAR (specpdl_ptr
->symbol
);
3100 where
= XCAR (XCDR (specpdl_ptr
->symbol
));
3103 Fset_default (symbol
, specpdl_ptr
->old_value
);
3104 else if (BUFFERP (where
))
3105 set_internal (symbol
, specpdl_ptr
->old_value
, XBUFFER (where
), 1);
3107 set_internal (symbol
, specpdl_ptr
->old_value
, NULL
, 1);
3111 /* If variable has a trivial value (no forwarding), we can
3112 just set it. No need to check for constant symbols here,
3113 since that was already done by specbind. */
3114 if (!MISCP (SYMBOL_VALUE (specpdl_ptr
->symbol
)))
3115 SET_SYMBOL_VALUE (specpdl_ptr
->symbol
, specpdl_ptr
->old_value
);
3117 set_internal (specpdl_ptr
->symbol
, specpdl_ptr
->old_value
, 0, 1);
3121 if (NILP (Vquit_flag
) && quitf
)
3128 DEFUN ("backtrace-debug", Fbacktrace_debug
, Sbacktrace_debug
, 2, 2, 0,
3129 doc
: /* Set the debug-on-exit flag of eval frame LEVEL levels down to FLAG.
3130 The debugger is entered when that frame exits, if the flag is non-nil. */)
3132 Lisp_Object level
, flag
;
3134 register struct backtrace
*backlist
= backtrace_list
;
3137 CHECK_NUMBER (level
);
3139 for (i
= 0; backlist
&& i
< XINT (level
); i
++)
3141 backlist
= backlist
->next
;
3145 backlist
->debug_on_exit
= !NILP (flag
);
3150 DEFUN ("backtrace", Fbacktrace
, Sbacktrace
, 0, 0, "",
3151 doc
: /* Print a trace of Lisp function calls currently active.
3152 Output stream used is value of `standard-output'. */)
3155 register struct backtrace
*backlist
= backtrace_list
;
3159 extern Lisp_Object Vprint_level
;
3160 struct gcpro gcpro1
;
3162 XSETFASTINT (Vprint_level
, 3);
3169 write_string (backlist
->debug_on_exit
? "* " : " ", 2);
3170 if (backlist
->nargs
== UNEVALLED
)
3172 Fprin1 (Fcons (*backlist
->function
, *backlist
->args
), Qnil
);
3173 write_string ("\n", -1);
3177 tem
= *backlist
->function
;
3178 Fprin1 (tem
, Qnil
); /* This can QUIT */
3179 write_string ("(", -1);
3180 if (backlist
->nargs
== MANY
)
3182 for (tail
= *backlist
->args
, i
= 0;
3184 tail
= Fcdr (tail
), i
++)
3186 if (i
) write_string (" ", -1);
3187 Fprin1 (Fcar (tail
), Qnil
);
3192 for (i
= 0; i
< backlist
->nargs
; i
++)
3194 if (i
) write_string (" ", -1);
3195 Fprin1 (backlist
->args
[i
], Qnil
);
3198 write_string (")\n", -1);
3200 backlist
= backlist
->next
;
3203 Vprint_level
= Qnil
;
3208 DEFUN ("backtrace-frame", Fbacktrace_frame
, Sbacktrace_frame
, 1, 1, NULL
,
3209 doc
: /* Return the function and arguments NFRAMES up from current execution point.
3210 If that frame has not evaluated the arguments yet (or is a special form),
3211 the value is (nil FUNCTION ARG-FORMS...).
3212 If that frame has evaluated its arguments and called its function already,
3213 the value is (t FUNCTION ARG-VALUES...).
3214 A &rest arg is represented as the tail of the list ARG-VALUES.
3215 FUNCTION is whatever was supplied as car of evaluated list,
3216 or a lambda expression for macro calls.
3217 If NFRAMES is more than the number of frames, the value is nil. */)
3219 Lisp_Object nframes
;
3221 register struct backtrace
*backlist
= backtrace_list
;
3225 CHECK_NATNUM (nframes
);
3227 /* Find the frame requested. */
3228 for (i
= 0; backlist
&& i
< XFASTINT (nframes
); i
++)
3229 backlist
= backlist
->next
;
3233 if (backlist
->nargs
== UNEVALLED
)
3234 return Fcons (Qnil
, Fcons (*backlist
->function
, *backlist
->args
));
3237 if (backlist
->nargs
== MANY
)
3238 tem
= *backlist
->args
;
3240 tem
= Flist (backlist
->nargs
, backlist
->args
);
3242 return Fcons (Qt
, Fcons (*backlist
->function
, tem
));
3250 DEFVAR_INT ("max-specpdl-size", &max_specpdl_size
,
3251 doc
: /* *Limit on number of Lisp variable bindings & unwind-protects.
3252 If Lisp code tries to make more than this many at once,
3253 an error is signaled.
3254 You can safely use a value considerably larger than the default value,
3255 if that proves inconveniently small. However, if you increase it too far,
3256 Emacs could run out of memory trying to make the stack bigger. */);
3258 DEFVAR_INT ("max-lisp-eval-depth", &max_lisp_eval_depth
,
3259 doc
: /* *Limit on depth in `eval', `apply' and `funcall' before error.
3261 This limit serves to catch infinite recursions for you before they cause
3262 actual stack overflow in C, which would be fatal for Emacs.
3263 You can safely make it considerably larger than its default value,
3264 if that proves inconveniently small. However, if you increase it too far,
3265 Emacs could overflow the real C stack, and crash. */);
3267 DEFVAR_LISP ("quit-flag", &Vquit_flag
,
3268 doc
: /* Non-nil causes `eval' to abort, unless `inhibit-quit' is non-nil.
3269 Typing C-g sets `quit-flag' non-nil, regardless of `inhibit-quit'. */);
3272 DEFVAR_LISP ("inhibit-quit", &Vinhibit_quit
,
3273 doc
: /* Non-nil inhibits C-g quitting from happening immediately.
3274 Note that `quit-flag' will still be set by typing C-g,
3275 so a quit will be signaled as soon as `inhibit-quit' is nil.
3276 To prevent this happening, set `quit-flag' to nil
3277 before making `inhibit-quit' nil. */);
3278 Vinhibit_quit
= Qnil
;
3280 Qinhibit_quit
= intern ("inhibit-quit");
3281 staticpro (&Qinhibit_quit
);
3283 Qautoload
= intern ("autoload");
3284 staticpro (&Qautoload
);
3286 Qdebug_on_error
= intern ("debug-on-error");
3287 staticpro (&Qdebug_on_error
);
3289 Qmacro
= intern ("macro");
3290 staticpro (&Qmacro
);
3292 Qdeclare
= intern ("declare");
3293 staticpro (&Qdeclare
);
3295 /* Note that the process handling also uses Qexit, but we don't want
3296 to staticpro it twice, so we just do it here. */
3297 Qexit
= intern ("exit");
3300 Qinteractive
= intern ("interactive");
3301 staticpro (&Qinteractive
);
3303 Qcommandp
= intern ("commandp");
3304 staticpro (&Qcommandp
);
3306 Qdefun
= intern ("defun");
3307 staticpro (&Qdefun
);
3309 Qdefvar
= intern ("defvar");
3310 staticpro (&Qdefvar
);
3312 Qand_rest
= intern ("&rest");
3313 staticpro (&Qand_rest
);
3315 Qand_optional
= intern ("&optional");
3316 staticpro (&Qand_optional
);
3318 DEFVAR_LISP ("stack-trace-on-error", &Vstack_trace_on_error
,
3319 doc
: /* *Non-nil means errors display a backtrace buffer.
3320 More precisely, this happens for any error that is handled
3321 by the editor command loop.
3322 If the value is a list, an error only means to display a backtrace
3323 if one of its condition symbols appears in the list. */);
3324 Vstack_trace_on_error
= Qnil
;
3326 DEFVAR_LISP ("debug-on-error", &Vdebug_on_error
,
3327 doc
: /* *Non-nil means enter debugger if an error is signaled.
3328 Does not apply to errors handled by `condition-case' or those
3329 matched by `debug-ignored-errors'.
3330 If the value is a list, an error only means to enter the debugger
3331 if one of its condition symbols appears in the list.
3332 When you evaluate an expression interactively, this variable
3333 is temporarily non-nil if `eval-expression-debug-on-error' is non-nil.
3334 See also variable `debug-on-quit'. */);
3335 Vdebug_on_error
= Qnil
;
3337 DEFVAR_LISP ("debug-ignored-errors", &Vdebug_ignored_errors
,
3338 doc
: /* *List of errors for which the debugger should not be called.
3339 Each element may be a condition-name or a regexp that matches error messages.
3340 If any element applies to a given error, that error skips the debugger
3341 and just returns to top level.
3342 This overrides the variable `debug-on-error'.
3343 It does not apply to errors handled by `condition-case'. */);
3344 Vdebug_ignored_errors
= Qnil
;
3346 DEFVAR_BOOL ("debug-on-quit", &debug_on_quit
,
3347 doc
: /* *Non-nil means enter debugger if quit is signaled (C-g, for example).
3348 Does not apply if quit is handled by a `condition-case'.
3349 When you evaluate an expression interactively, this variable
3350 is temporarily non-nil if `eval-expression-debug-on-quit' is non-nil. */);
3353 DEFVAR_BOOL ("debug-on-next-call", &debug_on_next_call
,
3354 doc
: /* Non-nil means enter debugger before next `eval', `apply' or `funcall'. */);
3356 DEFVAR_BOOL ("debugger-may-continue", &debugger_may_continue
,
3357 doc
: /* Non-nil means debugger may continue execution.
3358 This is nil when the debugger is called under circumstances where it
3359 might not be safe to continue. */);
3360 debugger_may_continue
= 1;
3362 DEFVAR_LISP ("debugger", &Vdebugger
,
3363 doc
: /* Function to call to invoke debugger.
3364 If due to frame exit, args are `exit' and the value being returned;
3365 this function's value will be returned instead of that.
3366 If due to error, args are `error' and a list of the args to `signal'.
3367 If due to `apply' or `funcall' entry, one arg, `lambda'.
3368 If due to `eval' entry, one arg, t. */);
3371 DEFVAR_LISP ("signal-hook-function", &Vsignal_hook_function
,
3372 doc
: /* If non-nil, this is a function for `signal' to call.
3373 It receives the same arguments that `signal' was given.
3374 The Edebug package uses this to regain control. */);
3375 Vsignal_hook_function
= Qnil
;
3377 DEFVAR_LISP ("debug-on-signal", &Vdebug_on_signal
,
3378 doc
: /* *Non-nil means call the debugger regardless of condition handlers.
3379 Note that `debug-on-error', `debug-on-quit' and friends
3380 still determine whether to handle the particular condition. */);
3381 Vdebug_on_signal
= Qnil
;
3383 DEFVAR_LISP ("macro-declaration-function", &Vmacro_declaration_function
,
3384 doc
: /* Function to process declarations in a macro definition.
3385 The function will be called with two args MACRO and DECL.
3386 MACRO is the name of the macro being defined.
3387 DECL is a list `(declare ...)' containing the declarations.
3388 The value the function returns is not used. */);
3389 Vmacro_declaration_function
= Qnil
;
3391 Vrun_hooks
= intern ("run-hooks");
3392 staticpro (&Vrun_hooks
);
3394 staticpro (&Vautoload_queue
);
3395 Vautoload_queue
= Qnil
;
3396 staticpro (&Vsignaling_function
);
3397 Vsignaling_function
= Qnil
;
3408 defsubr (&Sfunction
);
3410 defsubr (&Sdefmacro
);
3412 defsubr (&Sdefvaralias
);
3413 defsubr (&Sdefconst
);
3414 defsubr (&Suser_variable_p
);
3418 defsubr (&Smacroexpand
);
3421 defsubr (&Sunwind_protect
);
3422 defsubr (&Scondition_case
);
3424 defsubr (&Sinteractive_p
);
3425 defsubr (&Scommandp
);
3426 defsubr (&Sautoload
);
3429 defsubr (&Sfuncall
);
3430 defsubr (&Srun_hooks
);
3431 defsubr (&Srun_hook_with_args
);
3432 defsubr (&Srun_hook_with_args_until_success
);
3433 defsubr (&Srun_hook_with_args_until_failure
);
3434 defsubr (&Sfetch_bytecode
);
3435 defsubr (&Sbacktrace_debug
);
3436 defsubr (&Sbacktrace
);
3437 defsubr (&Sbacktrace_frame
);