1 /* Evaluator for GNU Emacs Lisp interpreter.
2 Copyright (C) 1985, 1986, 1987, 1993, 1994, 1995 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 2, or (at your option)
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; see the file COPYING. If not, write to
18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
23 #include "blockinput.h"
34 /* This definition is duplicated in alloc.c and keyboard.c */
35 /* Putting it in lisp.h makes cc bomb out! */
39 struct backtrace
*next
;
40 Lisp_Object
*function
;
41 Lisp_Object
*args
; /* Points to vector of args. */
42 int nargs
; /* Length of vector.
43 If nargs is UNEVALLED, args points to slot holding
44 list of unevalled args */
46 /* Nonzero means call value of debugger when done with this operation. */
50 struct backtrace
*backtrace_list
;
52 /* This structure helps implement the `catch' and `throw' control
53 structure. A struct catchtag contains all the information needed
54 to restore the state of the interpreter after a non-local jump.
56 Handlers for error conditions (represented by `struct handler'
57 structures) just point to a catch tag to do the cleanup required
60 catchtag structures are chained together in the C calling stack;
61 the `next' member points to the next outer catchtag.
63 A call like (throw TAG VAL) searches for a catchtag whose `tag'
64 member is TAG, and then unbinds to it. The `val' member is used to
65 hold VAL while the stack is unwound; `val' is returned as the value
68 All the other members are concerned with restoring the interpreter
74 struct catchtag
*next
;
77 struct backtrace
*backlist
;
78 struct handler
*handlerlist
;
81 int poll_suppress_count
;
84 struct catchtag
*catchlist
;
86 Lisp_Object Qautoload
, Qmacro
, Qexit
, Qinteractive
, Qcommandp
, Qdefun
;
87 Lisp_Object Qinhibit_quit
, Vinhibit_quit
, Vquit_flag
;
88 Lisp_Object Qmocklisp_arguments
, Vmocklisp_arguments
, Qmocklisp
;
89 Lisp_Object Qand_rest
, Qand_optional
;
90 Lisp_Object Qdebug_on_error
;
92 Lisp_Object Vrun_hooks
;
94 /* Non-nil means record all fset's and provide's, to be undone
95 if the file being autoloaded is not fully loaded.
96 They are recorded by being consed onto the front of Vautoload_queue:
97 (FUN . ODEF) for a defun, (OFEATURES . nil) for a provide. */
99 Lisp_Object Vautoload_queue
;
101 /* Current number of specbindings allocated in specpdl. */
104 /* Pointer to beginning of specpdl. */
105 struct specbinding
*specpdl
;
107 /* Pointer to first unused element in specpdl. */
108 struct specbinding
*specpdl_ptr
;
110 /* Maximum size allowed for specpdl allocation */
111 int max_specpdl_size
;
113 /* Depth in Lisp evaluations and function calls. */
116 /* Maximum allowed depth in Lisp evaluations and function calls. */
117 int max_lisp_eval_depth
;
119 /* Nonzero means enter debugger before next function call */
120 int debug_on_next_call
;
122 /* List of conditions (non-nil atom means all) which cause a backtrace
123 if an error is handled by the command loop's error handler. */
124 Lisp_Object Vstack_trace_on_error
;
126 /* List of conditions (non-nil atom means all) which enter the debugger
127 if an error is handled by the command loop's error handler. */
128 Lisp_Object Vdebug_on_error
;
130 /* Nonzero means enter debugger if a quit signal
131 is handled by the command loop's error handler. */
134 /* The value of num_nonmacro_input_chars as of the last time we
135 started to enter the debugger. If we decide to enter the debugger
136 again when this is still equal to num_nonmacro_input_chars, then we
137 know that the debugger itself has an error, and we should just
138 signal the error instead of entering an infinite loop of debugger
140 int when_entered_debugger
;
142 Lisp_Object Vdebugger
;
144 void specbind (), record_unwind_protect ();
146 Lisp_Object
funcall_lambda ();
147 extern Lisp_Object
ml_apply (); /* Apply a mocklisp function to unevaluated argument list */
152 specpdl
= (struct specbinding
*) xmalloc (specpdl_size
* sizeof (struct specbinding
));
153 max_specpdl_size
= 600;
154 max_lisp_eval_depth
= 200;
161 specpdl_ptr
= specpdl
;
166 debug_on_next_call
= 0;
168 /* This is less than the initial value of num_nonmacro_input_chars. */
169 when_entered_debugger
= -1;
176 if (lisp_eval_depth
+ 20 > max_lisp_eval_depth
)
177 max_lisp_eval_depth
= lisp_eval_depth
+ 20;
178 if (specpdl_size
+ 40 > max_specpdl_size
)
179 max_specpdl_size
= specpdl_size
+ 40;
180 debug_on_next_call
= 0;
181 when_entered_debugger
= num_nonmacro_input_chars
;
182 return apply1 (Vdebugger
, arg
);
185 do_debug_on_call (code
)
188 debug_on_next_call
= 0;
189 backtrace_list
->debug_on_exit
= 1;
190 call_debugger (Fcons (code
, Qnil
));
193 /* NOTE!!! Every function that can call EVAL must protect its args
194 and temporaries from garbage collection while it needs them.
195 The definition of `For' shows what you have to do. */
197 DEFUN ("or", For
, Sor
, 0, UNEVALLED
, 0,
198 "Eval args until one of them yields non-nil, then return that value.\n\
199 The remaining args are not evalled at all.\n\
200 If all args return nil, return nil.")
204 register Lisp_Object val
;
205 Lisp_Object args_left
;
216 val
= Feval (Fcar (args_left
));
219 args_left
= Fcdr (args_left
);
221 while (!NILP(args_left
));
227 DEFUN ("and", Fand
, Sand
, 0, UNEVALLED
, 0,
228 "Eval args until one of them yields nil, then return nil.\n\
229 The remaining args are not evalled at all.\n\
230 If no arg yields nil, return the last arg's value.")
234 register Lisp_Object val
;
235 Lisp_Object args_left
;
246 val
= Feval (Fcar (args_left
));
249 args_left
= Fcdr (args_left
);
251 while (!NILP(args_left
));
257 DEFUN ("if", Fif
, Sif
, 2, UNEVALLED
, 0,
258 "(if COND THEN ELSE...): if COND yields non-nil, do THEN, else do ELSE...\n\
259 Returns the value of THEN or the value of the last of the ELSE's.\n\
260 THEN must be one expression, but ELSE... can be zero or more expressions.\n\
261 If COND yields nil, and there are no ELSE's, the value is nil.")
265 register Lisp_Object cond
;
269 cond
= Feval (Fcar (args
));
273 return Feval (Fcar (Fcdr (args
)));
274 return Fprogn (Fcdr (Fcdr (args
)));
277 DEFUN ("cond", Fcond
, Scond
, 0, UNEVALLED
, 0,
278 "(cond CLAUSES...): try each clause until one succeeds.\n\
279 Each clause looks like (CONDITION BODY...). CONDITION is evaluated\n\
280 and, if the value is non-nil, this clause succeeds:\n\
281 then the expressions in BODY are evaluated and the last one's\n\
282 value is the value of the cond-form.\n\
283 If no clause succeeds, cond returns nil.\n\
284 If a clause has one element, as in (CONDITION),\n\
285 CONDITION's value if non-nil is returned from the cond-form.")
289 register Lisp_Object clause
, val
;
296 clause
= Fcar (args
);
297 val
= Feval (Fcar (clause
));
300 if (!EQ (XCONS (clause
)->cdr
, Qnil
))
301 val
= Fprogn (XCONS (clause
)->cdr
);
304 args
= XCONS (args
)->cdr
;
311 DEFUN ("progn", Fprogn
, Sprogn
, 0, UNEVALLED
, 0,
312 "(progn BODY...): eval BODY forms sequentially and return value of last one.")
316 register Lisp_Object val
, tem
;
317 Lisp_Object args_left
;
320 /* In Mocklisp code, symbols at the front of the progn arglist
321 are to be bound to zero. */
322 if (!EQ (Vmocklisp_arguments
, Qt
))
324 val
= make_number (0);
325 while (!NILP (args
) && (tem
= Fcar (args
), SYMBOLP (tem
)))
328 specbind (tem
, val
), args
= Fcdr (args
);
340 val
= Feval (Fcar (args_left
));
341 args_left
= Fcdr (args_left
);
343 while (!NILP(args_left
));
349 DEFUN ("prog1", Fprog1
, Sprog1
, 1, UNEVALLED
, 0,
350 "(prog1 FIRST BODY...): eval FIRST and BODY sequentially; value from FIRST.\n\
351 The value of FIRST is saved during the evaluation of the remaining args,\n\
352 whose values are discarded.")
357 register Lisp_Object args_left
;
358 struct gcpro gcpro1
, gcpro2
;
359 register int argnum
= 0;
371 val
= Feval (Fcar (args_left
));
373 Feval (Fcar (args_left
));
374 args_left
= Fcdr (args_left
);
376 while (!NILP(args_left
));
382 DEFUN ("prog2", Fprog2
, Sprog2
, 2, UNEVALLED
, 0,
383 "(prog2 X Y BODY...): eval X, Y and BODY sequentially; value from Y.\n\
384 The value of Y is saved during the evaluation of the remaining args,\n\
385 whose values are discarded.")
390 register Lisp_Object args_left
;
391 struct gcpro gcpro1
, gcpro2
;
392 register int argnum
= -1;
406 val
= Feval (Fcar (args_left
));
408 Feval (Fcar (args_left
));
409 args_left
= Fcdr (args_left
);
411 while (!NILP (args_left
));
417 DEFUN ("setq", Fsetq
, Ssetq
, 0, UNEVALLED
, 0,
418 "(setq SYM VAL SYM VAL ...): set each SYM to the value of its VAL.\n\
419 The symbols SYM are variables; they are literal (not evaluated).\n\
420 The values VAL are expressions; they are evaluated.\n\
421 Thus, (setq x (1+ y)) sets `x' to the value of `(1+ y)'.\n\
422 The second VAL is not computed until after the first SYM is set, and so on;\n\
423 each VAL can use the new value of variables set earlier in the `setq'.\n\
424 The return value of the `setq' form is the value of the last VAL.")
428 register Lisp_Object args_left
;
429 register Lisp_Object val
, sym
;
440 val
= Feval (Fcar (Fcdr (args_left
)));
441 sym
= Fcar (args_left
);
443 args_left
= Fcdr (Fcdr (args_left
));
445 while (!NILP(args_left
));
451 DEFUN ("quote", Fquote
, Squote
, 1, UNEVALLED
, 0,
452 "Return the argument, without evaluating it. `(quote x)' yields `x'.")
459 DEFUN ("function", Ffunction
, Sfunction
, 1, UNEVALLED
, 0,
460 "Like `quote', but preferred for objects which are functions.\n\
461 In byte compilation, `function' causes its argument to be compiled.\n\
462 `quote' cannot do that.")
469 DEFUN ("interactive-p", Finteractive_p
, Sinteractive_p
, 0, 0, 0,
470 "Return t if function in which this appears was called interactively.\n\
471 This means that the function was called with call-interactively (which\n\
472 includes being called as the binding of a key)\n\
473 and input is currently coming from the keyboard (not in keyboard macro).")
476 register struct backtrace
*btp
;
477 register Lisp_Object fun
;
482 btp
= backtrace_list
;
484 /* If this isn't a byte-compiled function, there may be a frame at
485 the top for Finteractive_p itself. If so, skip it. */
486 fun
= Findirect_function (*btp
->function
);
487 if (SUBRP (fun
) && XSUBR (fun
) == &Sinteractive_p
)
490 /* If we're running an Emacs 18-style byte-compiled function, there
491 may be a frame for Fbytecode. Now, given the strictest
492 definition, this function isn't really being called
493 interactively, but because that's the way Emacs 18 always builds
494 byte-compiled functions, we'll accept it for now. */
495 if (EQ (*btp
->function
, Qbytecode
))
498 /* If this isn't a byte-compiled function, then we may now be
499 looking at several frames for special forms. Skip past them. */
501 btp
->nargs
== UNEVALLED
)
504 /* btp now points at the frame of the innermost function that isn't
505 a special form, ignoring frames for Finteractive_p and/or
506 Fbytecode at the top. If this frame is for a built-in function
507 (such as load or eval-region) return nil. */
508 fun
= Findirect_function (*btp
->function
);
511 /* btp points to the frame of a Lisp function that called interactive-p.
512 Return t if that function was called interactively. */
513 if (btp
&& btp
->next
&& EQ (*btp
->next
->function
, Qcall_interactively
))
518 DEFUN ("defun", Fdefun
, Sdefun
, 2, UNEVALLED
, 0,
519 "(defun NAME ARGLIST [DOCSTRING] BODY...): define NAME as a function.\n\
520 The definition is (lambda ARGLIST [DOCSTRING] BODY...).\n\
521 See also the function `interactive'.")
525 register Lisp_Object fn_name
;
526 register Lisp_Object defn
;
528 fn_name
= Fcar (args
);
529 defn
= Fcons (Qlambda
, Fcdr (args
));
530 if (!NILP (Vpurify_flag
))
531 defn
= Fpurecopy (defn
);
532 Ffset (fn_name
, defn
);
533 LOADHIST_ATTACH (fn_name
);
537 DEFUN ("defmacro", Fdefmacro
, Sdefmacro
, 2, UNEVALLED
, 0,
538 "(defmacro NAME ARGLIST [DOCSTRING] BODY...): define NAME as a macro.\n\
539 The definition is (macro lambda ARGLIST [DOCSTRING] BODY...).\n\
540 When the macro is called, as in (NAME ARGS...),\n\
541 the function (lambda ARGLIST BODY...) is applied to\n\
542 the list ARGS... as it appears in the expression,\n\
543 and the result should be a form to be evaluated instead of the original.")
547 register Lisp_Object fn_name
;
548 register Lisp_Object defn
;
550 fn_name
= Fcar (args
);
551 defn
= Fcons (Qmacro
, Fcons (Qlambda
, Fcdr (args
)));
552 if (!NILP (Vpurify_flag
))
553 defn
= Fpurecopy (defn
);
554 Ffset (fn_name
, defn
);
555 LOADHIST_ATTACH (fn_name
);
559 DEFUN ("defvar", Fdefvar
, Sdefvar
, 1, UNEVALLED
, 0,
560 "(defvar SYMBOL INITVALUE DOCSTRING): define SYMBOL as a variable.\n\
561 You are not required to define a variable in order to use it,\n\
562 but the definition can supply documentation and an initial value\n\
563 in a way that tags can recognize.\n\n\
564 INITVALUE is evaluated, and used to set SYMBOL, only if SYMBOL's value is void.\n\
565 If SYMBOL is buffer-local, its default value is what is set;\n\
566 buffer-local values are not affected.\n\
567 INITVALUE and DOCSTRING are optional.\n\
568 If DOCSTRING starts with *, this variable is identified as a user option.\n\
569 This means that M-x set-variable and M-x edit-options recognize it.\n\
570 If INITVALUE is missing, SYMBOL's value is not set.")
574 register Lisp_Object sym
, tem
, tail
;
578 if (!NILP (Fcdr (Fcdr (tail
))))
579 error ("too many arguments");
583 tem
= Fdefault_boundp (sym
);
585 Fset_default (sym
, Feval (Fcar (Fcdr (args
))));
587 tail
= Fcdr (Fcdr (args
));
588 if (!NILP (Fcar (tail
)))
591 if (!NILP (Vpurify_flag
))
592 tem
= Fpurecopy (tem
);
593 Fput (sym
, Qvariable_documentation
, tem
);
595 LOADHIST_ATTACH (sym
);
599 DEFUN ("defconst", Fdefconst
, Sdefconst
, 2, UNEVALLED
, 0,
600 "(defconst SYMBOL INITVALUE DOCSTRING): define SYMBOL as a constant variable.\n\
601 The intent is that programs do not change this value, but users may.\n\
602 Always sets the value of SYMBOL to the result of evalling INITVALUE.\n\
603 If SYMBOL is buffer-local, its default value is what is set;\n\
604 buffer-local values are not affected.\n\
605 DOCSTRING is optional.\n\
606 If DOCSTRING starts with *, this variable is identified as a user option.\n\
607 This means that M-x set-variable and M-x edit-options recognize it.\n\n\
608 Note: do not use `defconst' for user options in libraries that are not\n\
609 normally loaded, since it is useful for users to be able to specify\n\
610 their own values for such variables before loading the library.\n\
611 Since `defconst' unconditionally assigns the variable,\n\
612 it would override the user's choice.")
616 register Lisp_Object sym
, tem
;
619 if (!NILP (Fcdr (Fcdr (Fcdr (args
)))))
620 error ("too many arguments");
622 Fset_default (sym
, Feval (Fcar (Fcdr (args
))));
623 tem
= Fcar (Fcdr (Fcdr (args
)));
626 if (!NILP (Vpurify_flag
))
627 tem
= Fpurecopy (tem
);
628 Fput (sym
, Qvariable_documentation
, tem
);
630 LOADHIST_ATTACH (sym
);
634 DEFUN ("user-variable-p", Fuser_variable_p
, Suser_variable_p
, 1, 1, 0,
635 "Returns t if VARIABLE is intended to be set and modified by users.\n\
636 \(The alternative is a variable used internally in a Lisp program.)\n\
637 Determined by whether the first character of the documentation\n\
638 for the variable is `*'.")
640 Lisp_Object variable
;
642 Lisp_Object documentation
;
644 documentation
= Fget (variable
, Qvariable_documentation
);
645 if (INTEGERP (documentation
) && XINT (documentation
) < 0)
647 if (STRINGP (documentation
)
648 && ((unsigned char) XSTRING (documentation
)->data
[0] == '*'))
650 /* If it is (STRING . INTEGER), a negative integer means a user variable. */
651 if (CONSP (documentation
)
652 && STRINGP (XCONS (documentation
)->car
)
653 && INTEGERP (XCONS (documentation
)->cdr
)
654 && XINT (XCONS (documentation
)->cdr
) < 0)
659 DEFUN ("let*", FletX
, SletX
, 1, UNEVALLED
, 0,
660 "(let* VARLIST BODY...): bind variables according to VARLIST then eval BODY.\n\
661 The value of the last form in BODY is returned.\n\
662 Each element of VARLIST is a symbol (which is bound to nil)\n\
663 or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM).\n\
664 Each VALUEFORM can refer to the symbols already bound by this VARLIST.")
668 Lisp_Object varlist
, val
, elt
;
669 int count
= specpdl_ptr
- specpdl
;
670 struct gcpro gcpro1
, gcpro2
, gcpro3
;
672 GCPRO3 (args
, elt
, varlist
);
674 varlist
= Fcar (args
);
675 while (!NILP (varlist
))
678 elt
= Fcar (varlist
);
680 specbind (elt
, Qnil
);
681 else if (! NILP (Fcdr (Fcdr (elt
))))
683 Fcons (build_string ("`let' bindings can have only one value-form"),
687 val
= Feval (Fcar (Fcdr (elt
)));
688 specbind (Fcar (elt
), val
);
690 varlist
= Fcdr (varlist
);
693 val
= Fprogn (Fcdr (args
));
694 return unbind_to (count
, val
);
697 DEFUN ("let", Flet
, Slet
, 1, UNEVALLED
, 0,
698 "(let VARLIST BODY...): bind variables according to VARLIST then eval BODY.\n\
699 The value of the last form in BODY is returned.\n\
700 Each element of VARLIST is a symbol (which is bound to nil)\n\
701 or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM).\n\
702 All the VALUEFORMs are evalled before any symbols are bound.")
706 Lisp_Object
*temps
, tem
;
707 register Lisp_Object elt
, varlist
;
708 int count
= specpdl_ptr
- specpdl
;
710 struct gcpro gcpro1
, gcpro2
;
712 varlist
= Fcar (args
);
714 /* Make space to hold the values to give the bound variables */
715 elt
= Flength (varlist
);
716 temps
= (Lisp_Object
*) alloca (XFASTINT (elt
) * sizeof (Lisp_Object
));
718 /* Compute the values and store them in `temps' */
720 GCPRO2 (args
, *temps
);
723 for (argnum
= 0; !NILP (varlist
); varlist
= Fcdr (varlist
))
726 elt
= Fcar (varlist
);
728 temps
[argnum
++] = Qnil
;
729 else if (! NILP (Fcdr (Fcdr (elt
))))
731 Fcons (build_string ("`let' bindings can have only one value-form"),
734 temps
[argnum
++] = Feval (Fcar (Fcdr (elt
)));
735 gcpro2
.nvars
= argnum
;
739 varlist
= Fcar (args
);
740 for (argnum
= 0; !NILP (varlist
); varlist
= Fcdr (varlist
))
742 elt
= Fcar (varlist
);
743 tem
= temps
[argnum
++];
747 specbind (Fcar (elt
), tem
);
750 elt
= Fprogn (Fcdr (args
));
751 return unbind_to (count
, elt
);
754 DEFUN ("while", Fwhile
, Swhile
, 1, UNEVALLED
, 0,
755 "(while TEST BODY...): if TEST yields non-nil, eval BODY... and repeat.\n\
756 The order of execution is thus TEST, BODY, TEST, BODY and so on\n\
757 until TEST returns nil.")
761 Lisp_Object test
, body
, tem
;
762 struct gcpro gcpro1
, gcpro2
;
768 while (tem
= Feval (test
),
769 (!EQ (Vmocklisp_arguments
, Qt
) ? XINT (tem
) : !NILP (tem
)))
779 DEFUN ("macroexpand", Fmacroexpand
, Smacroexpand
, 1, 2, 0,
780 "Return result of expanding macros at top level of FORM.\n\
781 If FORM is not a macro call, it is returned unchanged.\n\
782 Otherwise, the macro is expanded and the expansion is considered\n\
783 in place of FORM. When a non-macro-call results, it is returned.\n\n\
784 The second optional arg ENVIRONMENT species an environment of macro\n\
785 definitions to shadow the loaded ones for use in file byte-compilation.")
787 register Lisp_Object form
;
790 /* With cleanups from Hallvard Furuseth. */
791 register Lisp_Object expander
, sym
, def
, tem
;
795 /* Come back here each time we expand a macro call,
796 in case it expands into another macro call. */
799 /* Set SYM, give DEF and TEM right values in case SYM is not a symbol. */
800 def
= sym
= XCONS (form
)->car
;
802 /* Trace symbols aliases to other symbols
803 until we get a symbol that is not an alias. */
804 while (SYMBOLP (def
))
808 tem
= Fassq (sym
, env
);
811 def
= XSYMBOL (sym
)->function
;
812 if (!EQ (def
, Qunbound
))
817 /* Right now TEM is the result from SYM in ENV,
818 and if TEM is nil then DEF is SYM's function definition. */
821 /* SYM is not mentioned in ENV.
822 Look at its function definition. */
823 if (EQ (def
, Qunbound
) || !CONSP (def
))
824 /* Not defined or definition not suitable */
826 if (EQ (XCONS (def
)->car
, Qautoload
))
828 /* Autoloading function: will it be a macro when loaded? */
829 tem
= Fnth (make_number (4), def
);
830 if (EQ (tem
, Qt
) || EQ (tem
, Qmacro
))
831 /* Yes, load it and try again. */
833 do_autoload (def
, sym
);
839 else if (!EQ (XCONS (def
)->car
, Qmacro
))
841 else expander
= XCONS (def
)->cdr
;
845 expander
= XCONS (tem
)->cdr
;
849 form
= apply1 (expander
, XCONS (form
)->cdr
);
854 DEFUN ("catch", Fcatch
, Scatch
, 1, UNEVALLED
, 0,
855 "(catch TAG BODY...): eval BODY allowing nonlocal exits using `throw'.\n\
856 TAG is evalled to get the tag to use. Then the BODY is executed.\n\
857 Within BODY, (throw TAG) with same tag exits BODY and exits this `catch'.\n\
858 If no throw happens, `catch' returns the value of the last BODY form.\n\
859 If a throw happens, it specifies the value to return from `catch'.")
863 register Lisp_Object tag
;
867 tag
= Feval (Fcar (args
));
869 return internal_catch (tag
, Fprogn
, Fcdr (args
));
872 /* Set up a catch, then call C function FUNC on argument ARG.
873 FUNC should return a Lisp_Object.
874 This is how catches are done from within C code. */
877 internal_catch (tag
, func
, arg
)
879 Lisp_Object (*func
) ();
882 /* This structure is made part of the chain `catchlist'. */
885 /* Fill in the components of c, and put it on the list. */
889 c
.backlist
= backtrace_list
;
890 c
.handlerlist
= handlerlist
;
891 c
.lisp_eval_depth
= lisp_eval_depth
;
892 c
.pdlcount
= specpdl_ptr
- specpdl
;
893 c
.poll_suppress_count
= poll_suppress_count
;
898 if (! _setjmp (c
.jmp
))
899 c
.val
= (*func
) (arg
);
901 /* Throw works by a longjmp that comes right here. */
906 /* Unwind the specbind, catch, and handler stacks back to CATCH, and
907 jump to that CATCH, returning VALUE as the value of that catch.
909 This is the guts Fthrow and Fsignal; they differ only in the way
910 they choose the catch tag to throw to. A catch tag for a
911 condition-case form has a TAG of Qnil.
913 Before each catch is discarded, unbind all special bindings and
914 execute all unwind-protect clauses made above that catch. Unwind
915 the handler stack as we go, so that the proper handlers are in
916 effect for each unwind-protect clause we run. At the end, restore
917 some static info saved in CATCH, and longjmp to the location
920 This is used for correct unwinding in Fthrow and Fsignal. */
923 unwind_to_catch (catch, value
)
924 struct catchtag
*catch;
927 register int last_time
;
929 /* Save the value in the tag. */
932 /* Restore the polling-suppression count. */
933 set_poll_suppress_count (catch->poll_suppress_count
);
937 last_time
= catchlist
== catch;
939 /* Unwind the specpdl stack, and then restore the proper set of
941 unbind_to (catchlist
->pdlcount
, Qnil
);
942 handlerlist
= catchlist
->handlerlist
;
943 catchlist
= catchlist
->next
;
947 gcprolist
= catch->gcpro
;
948 backtrace_list
= catch->backlist
;
949 lisp_eval_depth
= catch->lisp_eval_depth
;
951 _longjmp (catch->jmp
, 1);
954 DEFUN ("throw", Fthrow
, Sthrow
, 2, 2, 0,
955 "(throw TAG VALUE): throw to the catch for TAG and return VALUE from it.\n\
956 Both TAG and VALUE are evalled.")
958 register Lisp_Object tag
, val
;
960 register struct catchtag
*c
;
965 for (c
= catchlist
; c
; c
= c
->next
)
967 if (EQ (c
->tag
, tag
))
968 unwind_to_catch (c
, val
);
970 tag
= Fsignal (Qno_catch
, Fcons (tag
, Fcons (val
, Qnil
)));
975 DEFUN ("unwind-protect", Funwind_protect
, Sunwind_protect
, 1, UNEVALLED
, 0,
976 "Do BODYFORM, protecting with UNWINDFORMS.\n\
977 Usage looks like (unwind-protect BODYFORM UNWINDFORMS...).\n\
978 If BODYFORM completes normally, its value is returned\n\
979 after executing the UNWINDFORMS.\n\
980 If BODYFORM exits nonlocally, the UNWINDFORMS are executed anyway.")
985 int count
= specpdl_ptr
- specpdl
;
987 record_unwind_protect (0, Fcdr (args
));
988 val
= Feval (Fcar (args
));
989 return unbind_to (count
, val
);
992 /* Chain of condition handlers currently in effect.
993 The elements of this chain are contained in the stack frames
994 of Fcondition_case and internal_condition_case.
995 When an error is signaled (by calling Fsignal, below),
996 this chain is searched for an element that applies. */
998 struct handler
*handlerlist
;
1000 DEFUN ("condition-case", Fcondition_case
, Scondition_case
, 2, UNEVALLED
, 0,
1001 "Regain control when an error is signaled.\n\
1002 Usage looks like (condition-case VAR BODYFORM HANDLERS...).\n\
1003 executes BODYFORM and returns its value if no error happens.\n\
1004 Each element of HANDLERS looks like (CONDITION-NAME BODY...)\n\
1005 where the BODY is made of Lisp expressions.\n\n\
1006 A handler is applicable to an error\n\
1007 if CONDITION-NAME is one of the error's condition names.\n\
1008 If an error happens, the first applicable handler is run.\n\
1010 The car of a handler may be a list of condition names\n\
1011 instead of a single condition name.\n\
1013 When a handler handles an error,\n\
1014 control returns to the condition-case and the handler BODY... is executed\n\
1015 with VAR bound to (SIGNALED-CONDITIONS . SIGNAL-DATA).\n\
1016 VAR may be nil; then you do not get access to the signal information.\n\
1018 The value of the last BODY form is returned from the condition-case.\n\
1019 See also the function `signal' for more info.")
1026 register Lisp_Object var
, bodyform
, handlers
;
1029 bodyform
= Fcar (Fcdr (args
));
1030 handlers
= Fcdr (Fcdr (args
));
1031 CHECK_SYMBOL (var
, 0);
1033 for (val
= handlers
; ! NILP (val
); val
= Fcdr (val
))
1039 && (SYMBOLP (XCONS (tem
)->car
)
1040 || CONSP (XCONS (tem
)->car
)))))
1041 error ("Invalid condition handler", tem
);
1046 c
.backlist
= backtrace_list
;
1047 c
.handlerlist
= handlerlist
;
1048 c
.lisp_eval_depth
= lisp_eval_depth
;
1049 c
.pdlcount
= specpdl_ptr
- specpdl
;
1050 c
.poll_suppress_count
= poll_suppress_count
;
1051 c
.gcpro
= gcprolist
;
1052 if (_setjmp (c
.jmp
))
1055 specbind (h
.var
, c
.val
);
1056 val
= Fprogn (Fcdr (h
.chosen_clause
));
1058 /* Note that this just undoes the binding of h.var; whoever
1059 longjumped to us unwound the stack to c.pdlcount before
1061 unbind_to (c
.pdlcount
, Qnil
);
1068 h
.handler
= handlers
;
1069 h
.next
= handlerlist
;
1073 val
= Feval (bodyform
);
1075 handlerlist
= h
.next
;
1080 internal_condition_case (bfun
, handlers
, hfun
)
1081 Lisp_Object (*bfun
) ();
1082 Lisp_Object handlers
;
1083 Lisp_Object (*hfun
) ();
1091 c
.backlist
= backtrace_list
;
1092 c
.handlerlist
= handlerlist
;
1093 c
.lisp_eval_depth
= lisp_eval_depth
;
1094 c
.pdlcount
= specpdl_ptr
- specpdl
;
1095 c
.poll_suppress_count
= poll_suppress_count
;
1096 c
.gcpro
= gcprolist
;
1097 if (_setjmp (c
.jmp
))
1099 return (*hfun
) (c
.val
);
1103 h
.handler
= handlers
;
1105 h
.next
= handlerlist
;
1111 handlerlist
= h
.next
;
1116 internal_condition_case_1 (bfun
, arg
, handlers
, hfun
)
1117 Lisp_Object (*bfun
) ();
1119 Lisp_Object handlers
;
1120 Lisp_Object (*hfun
) ();
1128 c
.backlist
= backtrace_list
;
1129 c
.handlerlist
= handlerlist
;
1130 c
.lisp_eval_depth
= lisp_eval_depth
;
1131 c
.pdlcount
= specpdl_ptr
- specpdl
;
1132 c
.poll_suppress_count
= poll_suppress_count
;
1133 c
.gcpro
= gcprolist
;
1134 if (_setjmp (c
.jmp
))
1136 return (*hfun
) (c
.val
);
1140 h
.handler
= handlers
;
1142 h
.next
= handlerlist
;
1146 val
= (*bfun
) (arg
);
1148 handlerlist
= h
.next
;
1152 static Lisp_Object
find_handler_clause ();
1154 DEFUN ("signal", Fsignal
, Ssignal
, 2, 2, 0,
1155 "Signal an error. Args are ERROR-SYMBOL and associated DATA.\n\
1156 This function does not return.\n\n\
1157 An error symbol is a symbol with an `error-conditions' property\n\
1158 that is a list of condition names.\n\
1159 A handler for any of those names will get to handle this signal.\n\
1160 The symbol `error' should normally be one of them.\n\
1162 DATA should be a list. Its elements are printed as part of the error message.\n\
1163 If the signal is handled, DATA is made available to the handler.\n\
1164 See also the function `condition-case'.")
1165 (error_symbol
, data
)
1166 Lisp_Object error_symbol
, data
;
1168 register struct handler
*allhandlers
= handlerlist
;
1169 Lisp_Object conditions
;
1170 extern int gc_in_progress
;
1171 extern int waiting_for_input
;
1172 Lisp_Object debugger_value
;
1174 quit_error_check ();
1176 if (gc_in_progress
|| waiting_for_input
)
1179 #ifdef HAVE_X_WINDOWS
1180 TOTALLY_UNBLOCK_INPUT
;
1183 conditions
= Fget (error_symbol
, Qerror_conditions
);
1185 for (; handlerlist
; handlerlist
= handlerlist
->next
)
1187 register Lisp_Object clause
;
1188 clause
= find_handler_clause (handlerlist
->handler
, conditions
,
1189 error_symbol
, data
, &debugger_value
);
1191 #if 0 /* Most callers are not prepared to handle gc if this returns.
1192 So, since this feature is not very useful, take it out. */
1193 /* If have called debugger and user wants to continue,
1195 if (EQ (clause
, Qlambda
))
1196 return debugger_value
;
1198 if (EQ (clause
, Qlambda
))
1200 /* We can't return values to code which signalled an error, but we
1201 can continue code which has signalled a quit. */
1202 if (EQ (error_symbol
, Qquit
))
1205 error ("Cannot return from the debugger in an error");
1211 Lisp_Object unwind_data
;
1212 struct handler
*h
= handlerlist
;
1214 handlerlist
= allhandlers
;
1215 if (EQ (data
, memory_signal_data
))
1216 unwind_data
= memory_signal_data
;
1218 unwind_data
= Fcons (error_symbol
, data
);
1219 h
->chosen_clause
= clause
;
1220 unwind_to_catch (h
->tag
, unwind_data
);
1224 handlerlist
= allhandlers
;
1225 /* If no handler is present now, try to run the debugger,
1226 and if that fails, throw to top level. */
1227 find_handler_clause (Qerror
, conditions
, error_symbol
, data
, &debugger_value
);
1228 Fthrow (Qtop_level
, Qt
);
1231 /* Return nonzero iff LIST is a non-nil atom or
1232 a list containing one of CONDITIONS. */
1235 wants_debugger (list
, conditions
)
1236 Lisp_Object list
, conditions
;
1243 while (CONSP (conditions
))
1245 Lisp_Object
this, tail
;
1246 this = XCONS (conditions
)->car
;
1247 for (tail
= list
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
1248 if (EQ (XCONS (tail
)->car
, this))
1250 conditions
= XCONS (conditions
)->cdr
;
1255 /* Value of Qlambda means we have called debugger and user has continued.
1256 Store value returned from debugger into *DEBUGGER_VALUE_PTR. */
1259 find_handler_clause (handlers
, conditions
, sig
, data
, debugger_value_ptr
)
1260 Lisp_Object handlers
, conditions
, sig
, data
;
1261 Lisp_Object
*debugger_value_ptr
;
1263 register Lisp_Object h
;
1264 register Lisp_Object tem
;
1266 if (EQ (handlers
, Qt
)) /* t is used by handlers for all conditions, set up by C code. */
1268 if (EQ (handlers
, Qerror
)) /* error is used similarly, but means display a backtrace too */
1270 if (wants_debugger (Vstack_trace_on_error
, conditions
))
1271 internal_with_output_to_temp_buffer ("*Backtrace*", Fbacktrace
, Qnil
);
1272 if ((EQ (sig
, Qquit
)
1274 : wants_debugger (Vdebug_on_error
, conditions
))
1275 && when_entered_debugger
< num_nonmacro_input_chars
)
1277 int count
= specpdl_ptr
- specpdl
;
1278 specbind (Qdebug_on_error
, Qnil
);
1279 *debugger_value_ptr
=
1280 call_debugger (Fcons (Qerror
,
1281 Fcons (Fcons (sig
, data
),
1283 return unbind_to (count
, Qlambda
);
1287 for (h
= handlers
; CONSP (h
); h
= Fcdr (h
))
1289 Lisp_Object handler
, condit
;
1292 if (!CONSP (handler
))
1294 condit
= Fcar (handler
);
1295 /* Handle a single condition name in handler HANDLER. */
1296 if (SYMBOLP (condit
))
1298 tem
= Fmemq (Fcar (handler
), conditions
);
1302 /* Handle a list of condition names in handler HANDLER. */
1303 else if (CONSP (condit
))
1305 while (CONSP (condit
))
1307 tem
= Fmemq (Fcar (condit
), conditions
);
1310 condit
= XCONS (condit
)->cdr
;
1317 /* dump an error message; called like printf */
1321 error (m
, a1
, a2
, a3
)
1341 int used
= doprnt (buf
, size
, m
, m
+ mlen
, 3, args
);
1346 buffer
= (char *) xrealloc (buffer
, size
);
1349 buffer
= (char *) xmalloc (size
);
1354 string
= build_string (buf
);
1358 Fsignal (Qerror
, Fcons (string
, Qnil
));
1361 DEFUN ("commandp", Fcommandp
, Scommandp
, 1, 1, 0,
1362 "T if FUNCTION makes provisions for interactive calling.\n\
1363 This means it contains a description for how to read arguments to give it.\n\
1364 The value is nil for an invalid function or a symbol with no function\n\
1367 Interactively callable functions include strings and vectors (treated\n\
1368 as keyboard macros), lambda-expressions that contain a top-level call\n\
1369 to `interactive', autoload definitions made by `autoload' with non-nil\n\
1370 fourth argument, and some of the built-in functions of Lisp.\n\
1372 Also, a symbol satisfies `commandp' if its function definition does so.")
1374 Lisp_Object function
;
1376 register Lisp_Object fun
;
1377 register Lisp_Object funcar
;
1378 register Lisp_Object tem
;
1383 fun
= indirect_function (fun
);
1384 if (EQ (fun
, Qunbound
))
1387 /* Emacs primitives are interactive if their DEFUN specifies an
1388 interactive spec. */
1391 if (XSUBR (fun
)->prompt
)
1397 /* Bytecode objects are interactive if they are long enough to
1398 have an element whose index is COMPILED_INTERACTIVE, which is
1399 where the interactive spec is stored. */
1400 else if (COMPILEDP (fun
))
1401 return ((XVECTOR (fun
)->size
& PSEUDOVECTOR_SIZE_MASK
) > COMPILED_INTERACTIVE
1404 /* Strings and vectors are keyboard macros. */
1405 if (STRINGP (fun
) || VECTORP (fun
))
1408 /* Lists may represent commands. */
1411 funcar
= Fcar (fun
);
1412 if (!SYMBOLP (funcar
))
1413 return Fsignal (Qinvalid_function
, Fcons (fun
, Qnil
));
1414 if (EQ (funcar
, Qlambda
))
1415 return Fassq (Qinteractive
, Fcdr (Fcdr (fun
)));
1416 if (EQ (funcar
, Qmocklisp
))
1417 return Qt
; /* All mocklisp functions can be called interactively */
1418 if (EQ (funcar
, Qautoload
))
1419 return Fcar (Fcdr (Fcdr (Fcdr (fun
))));
1425 DEFUN ("autoload", Fautoload
, Sautoload
, 2, 5, 0,
1426 "Define FUNCTION to autoload from FILE.\n\
1427 FUNCTION is a symbol; FILE is a file name string to pass to `load'.\n\
1428 Third arg DOCSTRING is documentation for the function.\n\
1429 Fourth arg INTERACTIVE if non-nil says function can be called interactively.\n\
1430 Fifth arg TYPE indicates the type of the object:\n\
1431 nil or omitted says FUNCTION is a function,\n\
1432 `keymap' says FUNCTION is really a keymap, and\n\
1433 `macro' or t says FUNCTION is really a macro.\n\
1434 Third through fifth args give info about the real definition.\n\
1435 They default to nil.\n\
1436 If FUNCTION is already defined other than as an autoload,\n\
1437 this does nothing and returns nil.")
1438 (function
, file
, docstring
, interactive
, type
)
1439 Lisp_Object function
, file
, docstring
, interactive
, type
;
1442 Lisp_Object args
[4];
1445 CHECK_SYMBOL (function
, 0);
1446 CHECK_STRING (file
, 1);
1448 /* If function is defined and not as an autoload, don't override */
1449 if (!EQ (XSYMBOL (function
)->function
, Qunbound
)
1450 && !(CONSP (XSYMBOL (function
)->function
)
1451 && EQ (XCONS (XSYMBOL (function
)->function
)->car
, Qautoload
)))
1456 args
[1] = docstring
;
1457 args
[2] = interactive
;
1460 return Ffset (function
, Fcons (Qautoload
, Flist (4, &args
[0])));
1461 #else /* NO_ARG_ARRAY */
1462 return Ffset (function
, Fcons (Qautoload
, Flist (4, &file
)));
1463 #endif /* not NO_ARG_ARRAY */
1467 un_autoload (oldqueue
)
1468 Lisp_Object oldqueue
;
1470 register Lisp_Object queue
, first
, second
;
1472 /* Queue to unwind is current value of Vautoload_queue.
1473 oldqueue is the shadowed value to leave in Vautoload_queue. */
1474 queue
= Vautoload_queue
;
1475 Vautoload_queue
= oldqueue
;
1476 while (CONSP (queue
))
1478 first
= Fcar (queue
);
1479 second
= Fcdr (first
);
1480 first
= Fcar (first
);
1481 if (EQ (second
, Qnil
))
1484 Ffset (first
, second
);
1485 queue
= Fcdr (queue
);
1490 do_autoload (fundef
, funname
)
1491 Lisp_Object fundef
, funname
;
1493 int count
= specpdl_ptr
- specpdl
;
1494 Lisp_Object fun
, val
, queue
, first
, second
;
1497 CHECK_SYMBOL (funname
, 0);
1499 /* Value saved here is to be restored into Vautoload_queue */
1500 record_unwind_protect (un_autoload
, Vautoload_queue
);
1501 Vautoload_queue
= Qt
;
1502 Fload (Fcar (Fcdr (fundef
)), Qnil
, noninteractive
? Qt
: Qnil
, Qnil
);
1504 /* Save the old autoloads, in case we ever do an unload. */
1505 queue
= Vautoload_queue
;
1506 while (CONSP (queue
))
1508 first
= Fcar (queue
);
1509 second
= Fcdr (first
);
1510 first
= Fcar (first
);
1512 /* Note: This test is subtle. The cdr of an autoload-queue entry
1513 may be an atom if the autoload entry was generated by a defalias
1516 Fput (first
, Qautoload
, (Fcdr (second
)));
1518 queue
= Fcdr (queue
);
1521 /* Once loading finishes, don't undo it. */
1522 Vautoload_queue
= Qt
;
1523 unbind_to (count
, Qnil
);
1525 fun
= Findirect_function (fun
);
1527 if (!NILP (Fequal (fun
, fundef
)))
1528 error ("Autoloading failed to define function %s",
1529 XSYMBOL (funname
)->name
->data
);
1532 DEFUN ("eval", Feval
, Seval
, 1, 1, 0,
1533 "Evaluate FORM and return its value.")
1537 Lisp_Object fun
, val
, original_fun
, original_args
;
1539 struct backtrace backtrace
;
1540 struct gcpro gcpro1
, gcpro2
, gcpro3
;
1544 if (EQ (Vmocklisp_arguments
, Qt
))
1545 return Fsymbol_value (form
);
1546 val
= Fsymbol_value (form
);
1548 XSETFASTINT (val
, 0);
1549 else if (EQ (val
, Qt
))
1550 XSETFASTINT (val
, 1);
1557 if (consing_since_gc
> gc_cons_threshold
)
1560 Fgarbage_collect ();
1564 if (++lisp_eval_depth
> max_lisp_eval_depth
)
1566 if (max_lisp_eval_depth
< 100)
1567 max_lisp_eval_depth
= 100;
1568 if (lisp_eval_depth
> max_lisp_eval_depth
)
1569 error ("Lisp nesting exceeds max-lisp-eval-depth");
1572 original_fun
= Fcar (form
);
1573 original_args
= Fcdr (form
);
1575 backtrace
.next
= backtrace_list
;
1576 backtrace_list
= &backtrace
;
1577 backtrace
.function
= &original_fun
; /* This also protects them from gc */
1578 backtrace
.args
= &original_args
;
1579 backtrace
.nargs
= UNEVALLED
;
1580 backtrace
.evalargs
= 1;
1581 backtrace
.debug_on_exit
= 0;
1583 if (debug_on_next_call
)
1584 do_debug_on_call (Qt
);
1586 /* At this point, only original_fun and original_args
1587 have values that will be used below */
1589 fun
= Findirect_function (original_fun
);
1593 Lisp_Object numargs
;
1594 Lisp_Object argvals
[7];
1595 Lisp_Object args_left
;
1596 register int i
, maxargs
;
1598 args_left
= original_args
;
1599 numargs
= Flength (args_left
);
1601 if (XINT (numargs
) < XSUBR (fun
)->min_args
||
1602 (XSUBR (fun
)->max_args
>= 0 && XSUBR (fun
)->max_args
< XINT (numargs
)))
1603 return Fsignal (Qwrong_number_of_arguments
, Fcons (fun
, Fcons (numargs
, Qnil
)));
1605 if (XSUBR (fun
)->max_args
== UNEVALLED
)
1607 backtrace
.evalargs
= 0;
1608 val
= (*XSUBR (fun
)->function
) (args_left
);
1612 if (XSUBR (fun
)->max_args
== MANY
)
1614 /* Pass a vector of evaluated arguments */
1616 register int argnum
= 0;
1618 vals
= (Lisp_Object
*) alloca (XINT (numargs
) * sizeof (Lisp_Object
));
1620 GCPRO3 (args_left
, fun
, fun
);
1624 while (!NILP (args_left
))
1626 vals
[argnum
++] = Feval (Fcar (args_left
));
1627 args_left
= Fcdr (args_left
);
1628 gcpro3
.nvars
= argnum
;
1631 backtrace
.args
= vals
;
1632 backtrace
.nargs
= XINT (numargs
);
1634 val
= (*XSUBR (fun
)->function
) (XINT (numargs
), vals
);
1639 GCPRO3 (args_left
, fun
, fun
);
1640 gcpro3
.var
= argvals
;
1643 maxargs
= XSUBR (fun
)->max_args
;
1644 for (i
= 0; i
< maxargs
; args_left
= Fcdr (args_left
))
1646 argvals
[i
] = Feval (Fcar (args_left
));
1652 backtrace
.args
= argvals
;
1653 backtrace
.nargs
= XINT (numargs
);
1658 val
= (*XSUBR (fun
)->function
) ();
1661 val
= (*XSUBR (fun
)->function
) (argvals
[0]);
1664 val
= (*XSUBR (fun
)->function
) (argvals
[0], argvals
[1]);
1667 val
= (*XSUBR (fun
)->function
) (argvals
[0], argvals
[1],
1671 val
= (*XSUBR (fun
)->function
) (argvals
[0], argvals
[1],
1672 argvals
[2], argvals
[3]);
1675 val
= (*XSUBR (fun
)->function
) (argvals
[0], argvals
[1], argvals
[2],
1676 argvals
[3], argvals
[4]);
1679 val
= (*XSUBR (fun
)->function
) (argvals
[0], argvals
[1], argvals
[2],
1680 argvals
[3], argvals
[4], argvals
[5]);
1683 val
= (*XSUBR (fun
)->function
) (argvals
[0], argvals
[1], argvals
[2],
1684 argvals
[3], argvals
[4], argvals
[5],
1689 /* Someone has created a subr that takes more arguments than
1690 is supported by this code. We need to either rewrite the
1691 subr to use a different argument protocol, or add more
1692 cases to this switch. */
1696 if (COMPILEDP (fun
))
1697 val
= apply_lambda (fun
, original_args
, 1);
1701 return Fsignal (Qinvalid_function
, Fcons (fun
, Qnil
));
1702 funcar
= Fcar (fun
);
1703 if (!SYMBOLP (funcar
))
1704 return Fsignal (Qinvalid_function
, Fcons (fun
, Qnil
));
1705 if (EQ (funcar
, Qautoload
))
1707 do_autoload (fun
, original_fun
);
1710 if (EQ (funcar
, Qmacro
))
1711 val
= Feval (apply1 (Fcdr (fun
), original_args
));
1712 else if (EQ (funcar
, Qlambda
))
1713 val
= apply_lambda (fun
, original_args
, 1);
1714 else if (EQ (funcar
, Qmocklisp
))
1715 val
= ml_apply (fun
, original_args
);
1717 return Fsignal (Qinvalid_function
, Fcons (fun
, Qnil
));
1720 if (!EQ (Vmocklisp_arguments
, Qt
))
1723 XSETFASTINT (val
, 0);
1724 else if (EQ (val
, Qt
))
1725 XSETFASTINT (val
, 1);
1728 if (backtrace
.debug_on_exit
)
1729 val
= call_debugger (Fcons (Qexit
, Fcons (val
, Qnil
)));
1730 backtrace_list
= backtrace
.next
;
1734 DEFUN ("apply", Fapply
, Sapply
, 2, MANY
, 0,
1735 "Call FUNCTION with our remaining args, using our last arg as list of args.\n\
1736 Thus, (apply '+ 1 2 '(3 4)) returns 10.")
1741 register int i
, numargs
;
1742 register Lisp_Object spread_arg
;
1743 register Lisp_Object
*funcall_args
;
1745 struct gcpro gcpro1
;
1749 spread_arg
= args
[nargs
- 1];
1750 CHECK_LIST (spread_arg
, nargs
);
1752 numargs
= XINT (Flength (spread_arg
));
1755 return Ffuncall (nargs
- 1, args
);
1756 else if (numargs
== 1)
1758 args
[nargs
- 1] = XCONS (spread_arg
)->car
;
1759 return Ffuncall (nargs
, args
);
1762 numargs
+= nargs
- 2;
1764 fun
= indirect_function (fun
);
1765 if (EQ (fun
, Qunbound
))
1767 /* Let funcall get the error */
1774 if (numargs
< XSUBR (fun
)->min_args
1775 || (XSUBR (fun
)->max_args
>= 0 && XSUBR (fun
)->max_args
< numargs
))
1776 goto funcall
; /* Let funcall get the error */
1777 else if (XSUBR (fun
)->max_args
> numargs
)
1779 /* Avoid making funcall cons up a yet another new vector of arguments
1780 by explicitly supplying nil's for optional values */
1781 funcall_args
= (Lisp_Object
*) alloca ((1 + XSUBR (fun
)->max_args
)
1782 * sizeof (Lisp_Object
));
1783 for (i
= numargs
; i
< XSUBR (fun
)->max_args
;)
1784 funcall_args
[++i
] = Qnil
;
1785 GCPRO1 (*funcall_args
);
1786 gcpro1
.nvars
= 1 + XSUBR (fun
)->max_args
;
1790 /* We add 1 to numargs because funcall_args includes the
1791 function itself as well as its arguments. */
1794 funcall_args
= (Lisp_Object
*) alloca ((1 + numargs
)
1795 * sizeof (Lisp_Object
));
1796 GCPRO1 (*funcall_args
);
1797 gcpro1
.nvars
= 1 + numargs
;
1800 bcopy (args
, funcall_args
, nargs
* sizeof (Lisp_Object
));
1801 /* Spread the last arg we got. Its first element goes in
1802 the slot that it used to occupy, hence this value of I. */
1804 while (!NILP (spread_arg
))
1806 funcall_args
[i
++] = XCONS (spread_arg
)->car
;
1807 spread_arg
= XCONS (spread_arg
)->cdr
;
1810 RETURN_UNGCPRO (Ffuncall (gcpro1
.nvars
, funcall_args
));
1813 /* Apply fn to arg */
1816 Lisp_Object fn
, arg
;
1818 struct gcpro gcpro1
;
1822 RETURN_UNGCPRO (Ffuncall (1, &fn
));
1826 Lisp_Object args
[2];
1830 RETURN_UNGCPRO (Fapply (2, args
));
1832 #else /* not NO_ARG_ARRAY */
1833 RETURN_UNGCPRO (Fapply (2, &fn
));
1834 #endif /* not NO_ARG_ARRAY */
1837 /* Call function fn on no arguments */
1842 struct gcpro gcpro1
;
1845 RETURN_UNGCPRO (Ffuncall (1, &fn
));
1848 /* Call function fn with 1 argument arg1 */
1852 Lisp_Object fn
, arg1
;
1854 struct gcpro gcpro1
;
1856 Lisp_Object args
[2];
1862 RETURN_UNGCPRO (Ffuncall (2, args
));
1863 #else /* not NO_ARG_ARRAY */
1866 RETURN_UNGCPRO (Ffuncall (2, &fn
));
1867 #endif /* not NO_ARG_ARRAY */
1870 /* Call function fn with 2 arguments arg1, arg2 */
1873 call2 (fn
, arg1
, arg2
)
1874 Lisp_Object fn
, arg1
, arg2
;
1876 struct gcpro gcpro1
;
1878 Lisp_Object args
[3];
1884 RETURN_UNGCPRO (Ffuncall (3, args
));
1885 #else /* not NO_ARG_ARRAY */
1888 RETURN_UNGCPRO (Ffuncall (3, &fn
));
1889 #endif /* not NO_ARG_ARRAY */
1892 /* Call function fn with 3 arguments arg1, arg2, arg3 */
1895 call3 (fn
, arg1
, arg2
, arg3
)
1896 Lisp_Object fn
, arg1
, arg2
, arg3
;
1898 struct gcpro gcpro1
;
1900 Lisp_Object args
[4];
1907 RETURN_UNGCPRO (Ffuncall (4, args
));
1908 #else /* not NO_ARG_ARRAY */
1911 RETURN_UNGCPRO (Ffuncall (4, &fn
));
1912 #endif /* not NO_ARG_ARRAY */
1915 /* Call function fn with 4 arguments arg1, arg2, arg3, arg4 */
1918 call4 (fn
, arg1
, arg2
, arg3
, arg4
)
1919 Lisp_Object fn
, arg1
, arg2
, arg3
, arg4
;
1921 struct gcpro gcpro1
;
1923 Lisp_Object args
[5];
1931 RETURN_UNGCPRO (Ffuncall (5, args
));
1932 #else /* not NO_ARG_ARRAY */
1935 RETURN_UNGCPRO (Ffuncall (5, &fn
));
1936 #endif /* not NO_ARG_ARRAY */
1939 /* Call function fn with 5 arguments arg1, arg2, arg3, arg4, arg5 */
1942 call5 (fn
, arg1
, arg2
, arg3
, arg4
, arg5
)
1943 Lisp_Object fn
, arg1
, arg2
, arg3
, arg4
, arg5
;
1945 struct gcpro gcpro1
;
1947 Lisp_Object args
[6];
1956 RETURN_UNGCPRO (Ffuncall (6, args
));
1957 #else /* not NO_ARG_ARRAY */
1960 RETURN_UNGCPRO (Ffuncall (6, &fn
));
1961 #endif /* not NO_ARG_ARRAY */
1964 /* Call function fn with 6 arguments arg1, arg2, arg3, arg4, arg5, arg6 */
1967 call6 (fn
, arg1
, arg2
, arg3
, arg4
, arg5
, arg6
)
1968 Lisp_Object fn
, arg1
, arg2
, arg3
, arg4
, arg5
, arg6
;
1970 struct gcpro gcpro1
;
1972 Lisp_Object args
[7];
1982 RETURN_UNGCPRO (Ffuncall (7, args
));
1983 #else /* not NO_ARG_ARRAY */
1986 RETURN_UNGCPRO (Ffuncall (7, &fn
));
1987 #endif /* not NO_ARG_ARRAY */
1990 DEFUN ("funcall", Ffuncall
, Sfuncall
, 1, MANY
, 0,
1991 "Call first argument as a function, passing remaining arguments to it.\n\
1992 Thus, (funcall 'cons 'x 'y) returns (x . y).")
1999 int numargs
= nargs
- 1;
2000 Lisp_Object lisp_numargs
;
2002 struct backtrace backtrace
;
2003 register Lisp_Object
*internal_args
;
2007 if (consing_since_gc
> gc_cons_threshold
)
2008 Fgarbage_collect ();
2010 if (++lisp_eval_depth
> max_lisp_eval_depth
)
2012 if (max_lisp_eval_depth
< 100)
2013 max_lisp_eval_depth
= 100;
2014 if (lisp_eval_depth
> max_lisp_eval_depth
)
2015 error ("Lisp nesting exceeds max-lisp-eval-depth");
2018 backtrace
.next
= backtrace_list
;
2019 backtrace_list
= &backtrace
;
2020 backtrace
.function
= &args
[0];
2021 backtrace
.args
= &args
[1];
2022 backtrace
.nargs
= nargs
- 1;
2023 backtrace
.evalargs
= 0;
2024 backtrace
.debug_on_exit
= 0;
2026 if (debug_on_next_call
)
2027 do_debug_on_call (Qlambda
);
2033 fun
= Findirect_function (fun
);
2037 if (numargs
< XSUBR (fun
)->min_args
2038 || (XSUBR (fun
)->max_args
>= 0 && XSUBR (fun
)->max_args
< numargs
))
2040 XSETFASTINT (lisp_numargs
, numargs
);
2041 return Fsignal (Qwrong_number_of_arguments
, Fcons (fun
, Fcons (lisp_numargs
, Qnil
)));
2044 if (XSUBR (fun
)->max_args
== UNEVALLED
)
2045 return Fsignal (Qinvalid_function
, Fcons (fun
, Qnil
));
2047 if (XSUBR (fun
)->max_args
== MANY
)
2049 val
= (*XSUBR (fun
)->function
) (numargs
, args
+ 1);
2053 if (XSUBR (fun
)->max_args
> numargs
)
2055 internal_args
= (Lisp_Object
*) alloca (XSUBR (fun
)->max_args
* sizeof (Lisp_Object
));
2056 bcopy (args
+ 1, internal_args
, numargs
* sizeof (Lisp_Object
));
2057 for (i
= numargs
; i
< XSUBR (fun
)->max_args
; i
++)
2058 internal_args
[i
] = Qnil
;
2061 internal_args
= args
+ 1;
2062 switch (XSUBR (fun
)->max_args
)
2065 val
= (*XSUBR (fun
)->function
) ();
2068 val
= (*XSUBR (fun
)->function
) (internal_args
[0]);
2071 val
= (*XSUBR (fun
)->function
) (internal_args
[0],
2075 val
= (*XSUBR (fun
)->function
) (internal_args
[0], internal_args
[1],
2079 val
= (*XSUBR (fun
)->function
) (internal_args
[0], internal_args
[1],
2084 val
= (*XSUBR (fun
)->function
) (internal_args
[0], internal_args
[1],
2085 internal_args
[2], internal_args
[3],
2089 val
= (*XSUBR (fun
)->function
) (internal_args
[0], internal_args
[1],
2090 internal_args
[2], internal_args
[3],
2091 internal_args
[4], internal_args
[5]);
2094 val
= (*XSUBR (fun
)->function
) (internal_args
[0], internal_args
[1],
2095 internal_args
[2], internal_args
[3],
2096 internal_args
[4], internal_args
[5],
2102 /* If a subr takes more than 6 arguments without using MANY
2103 or UNEVALLED, we need to extend this function to support it.
2104 Until this is done, there is no way to call the function. */
2108 if (COMPILEDP (fun
))
2109 val
= funcall_lambda (fun
, numargs
, args
+ 1);
2113 return Fsignal (Qinvalid_function
, Fcons (fun
, Qnil
));
2114 funcar
= Fcar (fun
);
2115 if (!SYMBOLP (funcar
))
2116 return Fsignal (Qinvalid_function
, Fcons (fun
, Qnil
));
2117 if (EQ (funcar
, Qlambda
))
2118 val
= funcall_lambda (fun
, numargs
, args
+ 1);
2119 else if (EQ (funcar
, Qmocklisp
))
2120 val
= ml_apply (fun
, Flist (numargs
, args
+ 1));
2121 else if (EQ (funcar
, Qautoload
))
2123 do_autoload (fun
, args
[0]);
2127 return Fsignal (Qinvalid_function
, Fcons (fun
, Qnil
));
2131 if (backtrace
.debug_on_exit
)
2132 val
= call_debugger (Fcons (Qexit
, Fcons (val
, Qnil
)));
2133 backtrace_list
= backtrace
.next
;
2138 apply_lambda (fun
, args
, eval_flag
)
2139 Lisp_Object fun
, args
;
2142 Lisp_Object args_left
;
2143 Lisp_Object numargs
;
2144 register Lisp_Object
*arg_vector
;
2145 struct gcpro gcpro1
, gcpro2
, gcpro3
;
2147 register Lisp_Object tem
;
2149 numargs
= Flength (args
);
2150 arg_vector
= (Lisp_Object
*) alloca (XINT (numargs
) * sizeof (Lisp_Object
));
2153 GCPRO3 (*arg_vector
, args_left
, fun
);
2156 for (i
= 0; i
< XINT (numargs
);)
2158 tem
= Fcar (args_left
), args_left
= Fcdr (args_left
);
2159 if (eval_flag
) tem
= Feval (tem
);
2160 arg_vector
[i
++] = tem
;
2168 backtrace_list
->args
= arg_vector
;
2169 backtrace_list
->nargs
= i
;
2171 backtrace_list
->evalargs
= 0;
2172 tem
= funcall_lambda (fun
, XINT (numargs
), arg_vector
);
2174 /* Do the debug-on-exit now, while arg_vector still exists. */
2175 if (backtrace_list
->debug_on_exit
)
2176 tem
= call_debugger (Fcons (Qexit
, Fcons (tem
, Qnil
)));
2177 /* Don't do it again when we return to eval. */
2178 backtrace_list
->debug_on_exit
= 0;
2182 /* Apply a Lisp function FUN to the NARGS evaluated arguments in ARG_VECTOR
2183 and return the result of evaluation.
2184 FUN must be either a lambda-expression or a compiled-code object. */
2187 funcall_lambda (fun
, nargs
, arg_vector
)
2190 register Lisp_Object
*arg_vector
;
2192 Lisp_Object val
, tem
;
2193 register Lisp_Object syms_left
;
2194 Lisp_Object numargs
;
2195 register Lisp_Object next
;
2196 int count
= specpdl_ptr
- specpdl
;
2198 int optional
= 0, rest
= 0;
2200 specbind (Qmocklisp_arguments
, Qt
); /* t means NOT mocklisp! */
2202 XSETFASTINT (numargs
, nargs
);
2205 syms_left
= Fcar (Fcdr (fun
));
2206 else if (COMPILEDP (fun
))
2207 syms_left
= XVECTOR (fun
)->contents
[COMPILED_ARGLIST
];
2211 for (; !NILP (syms_left
); syms_left
= Fcdr (syms_left
))
2214 next
= Fcar (syms_left
);
2215 while (!SYMBOLP (next
))
2216 next
= Fsignal (Qinvalid_function
, Fcons (fun
, Qnil
));
2217 if (EQ (next
, Qand_rest
))
2219 else if (EQ (next
, Qand_optional
))
2223 specbind (next
, Flist (nargs
- i
, &arg_vector
[i
]));
2228 tem
= arg_vector
[i
++];
2229 specbind (next
, tem
);
2232 return Fsignal (Qwrong_number_of_arguments
, Fcons (fun
, Fcons (numargs
, Qnil
)));
2234 specbind (next
, Qnil
);
2238 return Fsignal (Qwrong_number_of_arguments
, Fcons (fun
, Fcons (numargs
, Qnil
)));
2241 val
= Fprogn (Fcdr (Fcdr (fun
)));
2244 /* If we have not actually read the bytecode string
2245 and constants vector yet, fetch them from the file. */
2246 if (CONSP (XVECTOR (fun
)->contents
[COMPILED_BYTECODE
]))
2247 Ffetch_bytecode (fun
);
2248 val
= Fbyte_code (XVECTOR (fun
)->contents
[COMPILED_BYTECODE
],
2249 XVECTOR (fun
)->contents
[COMPILED_CONSTANTS
],
2250 XVECTOR (fun
)->contents
[COMPILED_STACK_DEPTH
]);
2252 return unbind_to (count
, val
);
2255 DEFUN ("fetch-bytecode", Ffetch_bytecode
, Sfetch_bytecode
,
2257 "If byte-compiled OBJECT is lazy-loaded, fetch it now.")
2263 if (COMPILEDP (object
)
2264 && CONSP (XVECTOR (object
)->contents
[COMPILED_BYTECODE
]))
2266 tem
= read_doc_string (XVECTOR (object
)->contents
[COMPILED_BYTECODE
]);
2267 XVECTOR (object
)->contents
[COMPILED_BYTECODE
] = XCONS (tem
)->car
;
2268 XVECTOR (object
)->contents
[COMPILED_CONSTANTS
] = XCONS (tem
)->cdr
;
2276 register int count
= specpdl_ptr
- specpdl
;
2277 if (specpdl_size
>= max_specpdl_size
)
2279 if (max_specpdl_size
< 400)
2280 max_specpdl_size
= 400;
2281 if (specpdl_size
>= max_specpdl_size
)
2283 if (!NILP (Vdebug_on_error
))
2284 /* Leave room for some specpdl in the debugger. */
2285 max_specpdl_size
= specpdl_size
+ 100;
2287 Fcons (build_string ("Variable binding depth exceeds max-specpdl-size"), Qnil
));
2291 if (specpdl_size
> max_specpdl_size
)
2292 specpdl_size
= max_specpdl_size
;
2293 specpdl
= (struct specbinding
*) xrealloc (specpdl
, specpdl_size
* sizeof (struct specbinding
));
2294 specpdl_ptr
= specpdl
+ count
;
2298 specbind (symbol
, value
)
2299 Lisp_Object symbol
, value
;
2303 CHECK_SYMBOL (symbol
, 0);
2305 if (specpdl_ptr
== specpdl
+ specpdl_size
)
2307 specpdl_ptr
->symbol
= symbol
;
2308 specpdl_ptr
->func
= 0;
2309 specpdl_ptr
->old_value
= ovalue
= find_symbol_value (symbol
);
2311 if (BUFFER_OBJFWDP (ovalue
) || KBOARD_OBJFWDP (ovalue
))
2312 store_symval_forwarding (symbol
, ovalue
, value
);
2314 Fset (symbol
, value
);
2318 record_unwind_protect (function
, arg
)
2319 Lisp_Object (*function
)();
2322 if (specpdl_ptr
== specpdl
+ specpdl_size
)
2324 specpdl_ptr
->func
= function
;
2325 specpdl_ptr
->symbol
= Qnil
;
2326 specpdl_ptr
->old_value
= arg
;
2331 unbind_to (count
, value
)
2335 int quitf
= !NILP (Vquit_flag
);
2336 struct gcpro gcpro1
;
2342 while (specpdl_ptr
!= specpdl
+ count
)
2345 if (specpdl_ptr
->func
!= 0)
2346 (*specpdl_ptr
->func
) (specpdl_ptr
->old_value
);
2347 /* Note that a "binding" of nil is really an unwind protect,
2348 so in that case the "old value" is a list of forms to evaluate. */
2349 else if (NILP (specpdl_ptr
->symbol
))
2350 Fprogn (specpdl_ptr
->old_value
);
2352 Fset (specpdl_ptr
->symbol
, specpdl_ptr
->old_value
);
2354 if (NILP (Vquit_flag
) && quitf
) Vquit_flag
= Qt
;
2363 /* Get the value of symbol's global binding, even if that binding
2364 is not now dynamically visible. */
2367 top_level_value (symbol
)
2370 register struct specbinding
*ptr
= specpdl
;
2372 CHECK_SYMBOL (symbol
, 0);
2373 for (; ptr
!= specpdl_ptr
; ptr
++)
2375 if (EQ (ptr
->symbol
, symbol
))
2376 return ptr
->old_value
;
2378 return Fsymbol_value (symbol
);
2382 top_level_set (symbol
, newval
)
2383 Lisp_Object symbol
, newval
;
2385 register struct specbinding
*ptr
= specpdl
;
2387 CHECK_SYMBOL (symbol
, 0);
2388 for (; ptr
!= specpdl_ptr
; ptr
++)
2390 if (EQ (ptr
->symbol
, symbol
))
2392 ptr
->old_value
= newval
;
2396 return Fset (symbol
, newval
);
2401 DEFUN ("backtrace-debug", Fbacktrace_debug
, Sbacktrace_debug
, 2, 2, 0,
2402 "Set the debug-on-exit flag of eval frame LEVEL levels down to FLAG.\n\
2403 The debugger is entered when that frame exits, if the flag is non-nil.")
2405 Lisp_Object level
, flag
;
2407 register struct backtrace
*backlist
= backtrace_list
;
2410 CHECK_NUMBER (level
, 0);
2412 for (i
= 0; backlist
&& i
< XINT (level
); i
++)
2414 backlist
= backlist
->next
;
2418 backlist
->debug_on_exit
= !NILP (flag
);
2423 DEFUN ("backtrace", Fbacktrace
, Sbacktrace
, 0, 0, "",
2424 "Print a trace of Lisp function calls currently active.\n\
2425 Output stream used is value of `standard-output'.")
2428 register struct backtrace
*backlist
= backtrace_list
;
2432 extern Lisp_Object Vprint_level
;
2433 struct gcpro gcpro1
;
2435 XSETFASTINT (Vprint_level
, 3);
2442 write_string (backlist
->debug_on_exit
? "* " : " ", 2);
2443 if (backlist
->nargs
== UNEVALLED
)
2445 Fprin1 (Fcons (*backlist
->function
, *backlist
->args
), Qnil
);
2446 write_string ("\n", -1);
2450 tem
= *backlist
->function
;
2451 Fprin1 (tem
, Qnil
); /* This can QUIT */
2452 write_string ("(", -1);
2453 if (backlist
->nargs
== MANY
)
2455 for (tail
= *backlist
->args
, i
= 0;
2457 tail
= Fcdr (tail
), i
++)
2459 if (i
) write_string (" ", -1);
2460 Fprin1 (Fcar (tail
), Qnil
);
2465 for (i
= 0; i
< backlist
->nargs
; i
++)
2467 if (i
) write_string (" ", -1);
2468 Fprin1 (backlist
->args
[i
], Qnil
);
2471 write_string (")\n", -1);
2473 backlist
= backlist
->next
;
2476 Vprint_level
= Qnil
;
2481 DEFUN ("backtrace-frame", Fbacktrace_frame
, Sbacktrace_frame
, 1, 1, "",
2482 "Return the function and arguments N frames up from current execution point.\n\
2483 If that frame has not evaluated the arguments yet (or is a special form),\n\
2484 the value is (nil FUNCTION ARG-FORMS...).\n\
2485 If that frame has evaluated its arguments and called its function already,\n\
2486 the value is (t FUNCTION ARG-VALUES...).\n\
2487 A &rest arg is represented as the tail of the list ARG-VALUES.\n\
2488 FUNCTION is whatever was supplied as car of evaluated list,\n\
2489 or a lambda expression for macro calls.\n\
2490 If N is more than the number of frames, the value is nil.")
2492 Lisp_Object nframes
;
2494 register struct backtrace
*backlist
= backtrace_list
;
2498 CHECK_NATNUM (nframes
, 0);
2500 /* Find the frame requested. */
2501 for (i
= 0; backlist
&& i
< XFASTINT (nframes
); i
++)
2502 backlist
= backlist
->next
;
2506 if (backlist
->nargs
== UNEVALLED
)
2507 return Fcons (Qnil
, Fcons (*backlist
->function
, *backlist
->args
));
2510 if (backlist
->nargs
== MANY
)
2511 tem
= *backlist
->args
;
2513 tem
= Flist (backlist
->nargs
, backlist
->args
);
2515 return Fcons (Qt
, Fcons (*backlist
->function
, tem
));
2521 DEFVAR_INT ("max-specpdl-size", &max_specpdl_size
,
2522 "Limit on number of Lisp variable bindings & unwind-protects before error.");
2524 DEFVAR_INT ("max-lisp-eval-depth", &max_lisp_eval_depth
,
2525 "Limit on depth in `eval', `apply' and `funcall' before error.\n\
2526 This limit is to catch infinite recursions for you before they cause\n\
2527 actual stack overflow in C, which would be fatal for Emacs.\n\
2528 You can safely make it considerably larger than its default value,\n\
2529 if that proves inconveniently small.");
2531 DEFVAR_LISP ("quit-flag", &Vquit_flag
,
2532 "Non-nil causes `eval' to abort, unless `inhibit-quit' is non-nil.\n\
2533 Typing C-g sets `quit-flag' non-nil, regardless of `inhibit-quit'.");
2536 DEFVAR_LISP ("inhibit-quit", &Vinhibit_quit
,
2537 "Non-nil inhibits C-g quitting from happening immediately.\n\
2538 Note that `quit-flag' will still be set by typing C-g,\n\
2539 so a quit will be signalled as soon as `inhibit-quit' is nil.\n\
2540 To prevent this happening, set `quit-flag' to nil\n\
2541 before making `inhibit-quit' nil.");
2542 Vinhibit_quit
= Qnil
;
2544 Qinhibit_quit
= intern ("inhibit-quit");
2545 staticpro (&Qinhibit_quit
);
2547 Qautoload
= intern ("autoload");
2548 staticpro (&Qautoload
);
2550 Qdebug_on_error
= intern ("debug-on-error");
2551 staticpro (&Qdebug_on_error
);
2553 Qmacro
= intern ("macro");
2554 staticpro (&Qmacro
);
2556 /* Note that the process handling also uses Qexit, but we don't want
2557 to staticpro it twice, so we just do it here. */
2558 Qexit
= intern ("exit");
2561 Qinteractive
= intern ("interactive");
2562 staticpro (&Qinteractive
);
2564 Qcommandp
= intern ("commandp");
2565 staticpro (&Qcommandp
);
2567 Qdefun
= intern ("defun");
2568 staticpro (&Qdefun
);
2570 Qand_rest
= intern ("&rest");
2571 staticpro (&Qand_rest
);
2573 Qand_optional
= intern ("&optional");
2574 staticpro (&Qand_optional
);
2576 DEFVAR_LISP ("stack-trace-on-error", &Vstack_trace_on_error
,
2577 "*Non-nil means automatically display a backtrace buffer\n\
2578 after any error that is handled by the editor command loop.\n\
2579 If the value is a list, an error only means to display a backtrace\n\
2580 if one of its condition symbols appears in the list.");
2581 Vstack_trace_on_error
= Qnil
;
2583 DEFVAR_LISP ("debug-on-error", &Vdebug_on_error
,
2584 "*Non-nil means enter debugger if an error is signaled.\n\
2585 Does not apply to errors handled by `condition-case'.\n\
2586 If the value is a list, an error only means to enter the debugger\n\
2587 if one of its condition symbols appears in the list.\n\
2588 See also variable `debug-on-quit'.");
2589 Vdebug_on_error
= Qnil
;
2591 DEFVAR_BOOL ("debug-on-quit", &debug_on_quit
,
2592 "*Non-nil means enter debugger if quit is signaled (C-g, for example).\n\
2593 Does not apply if quit is handled by a `condition-case'.");
2596 DEFVAR_BOOL ("debug-on-next-call", &debug_on_next_call
,
2597 "Non-nil means enter debugger before next `eval', `apply' or `funcall'.");
2599 DEFVAR_LISP ("debugger", &Vdebugger
,
2600 "Function to call to invoke debugger.\n\
2601 If due to frame exit, args are `exit' and the value being returned;\n\
2602 this function's value will be returned instead of that.\n\
2603 If due to error, args are `error' and a list of the args to `signal'.\n\
2604 If due to `apply' or `funcall' entry, one arg, `lambda'.\n\
2605 If due to `eval' entry, one arg, t.");
2608 Qmocklisp_arguments
= intern ("mocklisp-arguments");
2609 staticpro (&Qmocklisp_arguments
);
2610 DEFVAR_LISP ("mocklisp-arguments", &Vmocklisp_arguments
,
2611 "While in a mocklisp function, the list of its unevaluated args.");
2612 Vmocklisp_arguments
= Qt
;
2614 DEFVAR_LISP ("run-hooks", &Vrun_hooks
,
2615 "Set to the function `run-hooks', if that function has been defined.\n\
2616 Otherwise, nil (in a bare Emacs without preloaded Lisp code).");
2618 staticpro (&Vautoload_queue
);
2619 Vautoload_queue
= Qnil
;
2630 defsubr (&Sfunction
);
2632 defsubr (&Sdefmacro
);
2634 defsubr (&Sdefconst
);
2635 defsubr (&Suser_variable_p
);
2639 defsubr (&Smacroexpand
);
2642 defsubr (&Sunwind_protect
);
2643 defsubr (&Scondition_case
);
2645 defsubr (&Sinteractive_p
);
2646 defsubr (&Scommandp
);
2647 defsubr (&Sautoload
);
2650 defsubr (&Sfuncall
);
2651 defsubr (&Sfetch_bytecode
);
2652 defsubr (&Sbacktrace_debug
);
2653 defsubr (&Sbacktrace
);
2654 defsubr (&Sbacktrace_frame
);