1 /* Copyright (C) 1995,1996,1997,1998,1999,2000,2001,2002,2003,2004,
2 * 2005,2006,2007,2008,2009,2010,2011,2012,2013,2014
3 * Free Software Foundation, Inc.
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public License
7 * as published by the Free Software Foundation; either version 3 of
8 * the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
30 #include "libguile/__scm.h"
32 #include "libguile/_scm.h"
33 #include "libguile/alist.h"
34 #include "libguile/async.h"
35 #include "libguile/continuations.h"
36 #include "libguile/control.h"
37 #include "libguile/debug.h"
38 #include "libguile/deprecation.h"
39 #include "libguile/dynwind.h"
40 #include "libguile/eq.h"
41 #include "libguile/expand.h"
42 #include "libguile/feature.h"
43 #include "libguile/goops.h"
44 #include "libguile/hash.h"
45 #include "libguile/hashtab.h"
46 #include "libguile/list.h"
47 #include "libguile/macros.h"
48 #include "libguile/memoize.h"
49 #include "libguile/modules.h"
50 #include "libguile/ports.h"
51 #include "libguile/print.h"
52 #include "libguile/procprop.h"
53 #include "libguile/programs.h"
54 #include "libguile/root.h"
55 #include "libguile/smob.h"
56 #include "libguile/srcprop.h"
57 #include "libguile/stackchk.h"
58 #include "libguile/strings.h"
59 #include "libguile/threads.h"
60 #include "libguile/throw.h"
61 #include "libguile/validate.h"
62 #include "libguile/values.h"
63 #include "libguile/vectors.h"
64 #include "libguile/vm.h"
66 #include "libguile/eval.h"
67 #include "libguile/private-options.h"
72 /* We have three levels of EVAL here:
76 evaluates EXP in environment ENV. ENV is a lexical environment
77 structure as used by the actual tree code evaluator. When ENV is
78 a top-level environment, then changes to the current module are
79 tracked by updating ENV so that it continues to be in sync with
82 - scm_primitive_eval (exp)
84 evaluates EXP in the top-level environment as determined by the
85 current module. This is done by constructing a suitable
86 environment and calling eval. Thus, changes to the
87 top-level module are tracked normally.
91 evaluates EXP while MOD is the current module. This is done
92 by setting the current module to MOD_OR_STATE, invoking
93 scm_primitive_eval on EXP, and then restoring the current module
94 to the value it had previously. That is, while EXP is evaluated,
95 changes to the current module (or dynamic state) are tracked,
96 but these changes do not persist when scm_eval returns.
101 /* Boot closures. We only see these when compiling eval.scm, because once
102 eval.scm is in the house, closures are standard VM closures.
105 static scm_t_bits scm_tc16_boot_closure
;
106 #define RETURN_BOOT_CLOSURE(code, env) \
107 SCM_RETURN_NEWSMOB2 (scm_tc16_boot_closure, SCM_UNPACK (code), SCM_UNPACK (env))
108 #define BOOT_CLOSURE_P(obj) SCM_TYP16_PREDICATE (scm_tc16_boot_closure, (obj))
109 #define BOOT_CLOSURE_CODE(x) SCM_SMOB_OBJECT (x)
110 #define BOOT_CLOSURE_ENV(x) SCM_SMOB_OBJECT_2 (x)
111 #define BOOT_CLOSURE_BODY(x) CAR (BOOT_CLOSURE_CODE (x))
112 #define BOOT_CLOSURE_NUM_REQUIRED_ARGS(x) (SCM_I_INUM (CADDR (BOOT_CLOSURE_CODE (x))))
113 #define BOOT_CLOSURE_IS_FIXED(x) (scm_is_null (CDDDR (BOOT_CLOSURE_CODE (x))))
114 /* NB: One may only call the following accessors if the closure is not FIXED. */
115 #define BOOT_CLOSURE_HAS_REST_ARGS(x) scm_is_true (CADDR (SCM_CDR (BOOT_CLOSURE_CODE (x))))
116 #define BOOT_CLOSURE_IS_REST(x) scm_is_null (SCM_CDR (CDDDR (BOOT_CLOSURE_CODE (x))))
117 /* NB: One may only call the following accessors if the closure is not REST. */
118 #define BOOT_CLOSURE_IS_FULL(x) (1)
119 #define BOOT_CLOSURE_PARSE_FULL(fu_,body,nargs,rest,nopt,kw,inits,alt) \
121 body = CAR (fu); fu = CDDR (fu); \
123 rest = kw = alt = SCM_BOOL_F; \
127 nreq = SCM_I_INUM (CAR (fu)); fu = CDR (fu); \
128 if (scm_is_pair (fu)) \
130 rest = CAR (fu); fu = CDR (fu); \
131 if (scm_is_pair (fu)) \
133 nopt = SCM_I_INUM (CAR (fu)); fu = CDR (fu); \
134 kw = CAR (fu); fu = CDR (fu); \
135 inits = CAR (fu); fu = CDR (fu); \
140 static void prepare_boot_closure_env_for_apply (SCM proc
, SCM args
,
141 SCM
*out_body
, SCM
*out_env
);
142 static void prepare_boot_closure_env_for_eval (SCM proc
, unsigned int argc
,
143 SCM exps
, SCM
*out_body
,
147 #define CAR(x) SCM_CAR(x)
148 #define CDR(x) SCM_CDR(x)
149 #define CAAR(x) SCM_CAAR(x)
150 #define CADR(x) SCM_CADR(x)
151 #define CDAR(x) SCM_CDAR(x)
152 #define CDDR(x) SCM_CDDR(x)
153 #define CADDR(x) SCM_CADDR(x)
154 #define CDDDR(x) SCM_CDDDR(x)
156 #define VECTOR_REF(v, i) (SCM_SIMPLE_VECTOR_REF (v, i))
157 #define VECTOR_SET(v, i, x) (SCM_SIMPLE_VECTOR_SET (v, i, x))
158 #define VECTOR_LENGTH(v) (SCM_SIMPLE_VECTOR_LENGTH (v))
161 make_env (int n
, SCM init
, SCM next
)
163 SCM env
= scm_c_make_vector (n
+ 1, init
);
164 VECTOR_SET (env
, 0, next
);
171 return VECTOR_REF (env
, 0);
177 while (SCM_I_IS_VECTOR (env
))
178 env
= next_rib (env
);
183 env_ref (SCM env
, int depth
, int width
)
186 env
= next_rib (env
);
187 return VECTOR_REF (env
, width
+ 1);
191 env_set (SCM env
, int depth
, int width
, SCM val
)
194 env
= next_rib (env
);
195 VECTOR_SET (env
, width
+ 1, val
);
199 SCM_SYMBOL (scm_unbound_variable_key
, "unbound-variable");
201 static void error_used_before_defined (void)
203 scm_error (scm_unbound_variable_key
, NULL
,
204 "Variable used before given a value", SCM_EOL
, SCM_BOOL_F
);
207 static void error_invalid_keyword (SCM proc
, SCM obj
)
209 scm_error_scm (scm_from_latin1_symbol ("keyword-argument-error"), proc
,
210 scm_from_locale_string ("Invalid keyword"), SCM_EOL
,
214 static void error_unrecognized_keyword (SCM proc
, SCM kw
)
216 scm_error_scm (scm_from_latin1_symbol ("keyword-argument-error"), proc
,
217 scm_from_locale_string ("Unrecognized keyword"), SCM_EOL
,
222 /* Multiple values truncation. */
224 truncate_values (SCM x
)
226 if (SCM_LIKELY (!SCM_VALUESP (x
)))
230 SCM l
= scm_struct_ref (x
, SCM_INUM0
);
231 if (SCM_LIKELY (scm_is_pair (l
)))
235 scm_ithrow (scm_from_latin1_symbol ("vm-run"),
236 scm_list_3 (scm_from_latin1_symbol ("vm-run"),
237 scm_from_locale_string
238 ("Too few values returned to continuation"),
246 #define EVAL1(x, env) (truncate_values (eval ((x), (env))))
249 eval (SCM x
, SCM env
)
252 SCM proc
= SCM_UNDEFINED
, args
= SCM_EOL
;
258 mx
= SCM_MEMOIZED_ARGS (x
);
259 switch (SCM_I_INUM (SCM_CAR (x
)))
262 eval (CAR (mx
), env
);
267 if (scm_is_true (EVAL1 (CAR (mx
), env
)))
275 SCM inits
= CAR (mx
);
279 new_env
= make_env (VECTOR_LENGTH (inits
), SCM_UNDEFINED
, env
);
280 for (i
= 0; i
< VECTOR_LENGTH (inits
); i
++)
281 env_set (new_env
, 0, i
, EVAL1 (VECTOR_REF (inits
, i
), env
));
288 RETURN_BOOT_CLOSURE (mx
, env
);
294 scm_define (CAR (mx
), EVAL1 (CDR (mx
), env
));
295 return SCM_UNSPECIFIED
;
297 case SCM_M_CAPTURE_MODULE
:
298 return eval (mx
, scm_current_module ());
301 /* Evaluate the procedure to be applied. */
302 proc
= EVAL1 (CAR (mx
), env
);
303 /* Evaluate the argument holding the list of arguments */
304 args
= EVAL1 (CADR (mx
), env
);
307 /* Go here to tail-apply a procedure. PROC is the procedure and
308 * ARGS is the list of arguments. */
309 if (BOOT_CLOSURE_P (proc
))
311 prepare_boot_closure_env_for_apply (proc
, args
, &x
, &env
);
315 return scm_apply_0 (proc
, args
);
318 /* Evaluate the procedure to be applied. */
319 proc
= EVAL1 (CAR (mx
), env
);
320 argc
= SCM_I_INUM (CADR (mx
));
323 if (BOOT_CLOSURE_P (proc
))
325 prepare_boot_closure_env_for_eval (proc
, argc
, mx
, &x
, &env
);
333 argv
= alloca (argc
* sizeof (SCM
));
334 for (i
= 0; i
< argc
; i
++, mx
= CDR (mx
))
335 argv
[i
] = EVAL1 (CAR (mx
), env
);
337 return scm_call_n (proc
, argv
, argc
);
341 return scm_i_call_with_current_continuation (EVAL1 (mx
, env
));
343 case SCM_M_CALL_WITH_VALUES
:
348 producer
= EVAL1 (CAR (mx
), env
);
349 /* `proc' is the consumer. */
350 proc
= EVAL1 (CDR (mx
), env
);
351 v
= scm_call_0 (producer
);
353 args
= scm_struct_ref (v
, SCM_INUM0
);
355 args
= scm_list_1 (v
);
359 case SCM_M_LEXICAL_REF
:
365 depth
= SCM_I_INUM (CAR (pos
));
366 width
= SCM_I_INUM (CDR (pos
));
368 ret
= env_ref (env
, depth
, width
);
370 if (SCM_UNLIKELY (SCM_UNBNDP (ret
)))
371 /* we don't know what variable, though, because we don't have its
373 error_used_before_defined ();
377 case SCM_M_LEXICAL_SET
:
381 SCM val
= EVAL1 (CDR (mx
), env
);
384 depth
= SCM_I_INUM (CAR (pos
));
385 width
= SCM_I_INUM (CDR (pos
));
387 env_set (env
, depth
, width
, val
);
389 return SCM_UNSPECIFIED
;
392 case SCM_M_TOPLEVEL_REF
:
393 if (SCM_VARIABLEP (mx
))
394 return SCM_VARIABLE_REF (mx
);
397 env
= env_tail (env
);
398 return SCM_VARIABLE_REF (scm_memoize_variable_access_x (x
, env
));
401 case SCM_M_TOPLEVEL_SET
:
404 SCM val
= EVAL1 (CDR (mx
), env
);
405 if (SCM_VARIABLEP (var
))
407 SCM_VARIABLE_SET (var
, val
);
408 return SCM_UNSPECIFIED
;
412 env
= env_tail (env
);
413 SCM_VARIABLE_SET (scm_memoize_variable_access_x (x
, env
), val
);
414 return SCM_UNSPECIFIED
;
418 case SCM_M_MODULE_REF
:
419 if (SCM_VARIABLEP (mx
))
420 return SCM_VARIABLE_REF (mx
);
422 return SCM_VARIABLE_REF
423 (scm_memoize_variable_access_x (x
, SCM_BOOL_F
));
425 case SCM_M_MODULE_SET
:
426 if (SCM_VARIABLEP (CDR (mx
)))
428 SCM_VARIABLE_SET (CDR (mx
), EVAL1 (CAR (mx
), env
));
429 return SCM_UNSPECIFIED
;
434 (scm_memoize_variable_access_x (x
, SCM_BOOL_F
),
435 EVAL1 (CAR (mx
), env
));
436 return SCM_UNSPECIFIED
;
439 case SCM_M_CALL_WITH_PROMPT
:
443 scm_i_jmp_buf registers
;
444 /* We need the handler after nonlocal return to the setjmp, so
445 make sure it is volatile. */
446 volatile SCM handler
;
448 k
= EVAL1 (CAR (mx
), env
);
449 handler
= EVAL1 (CDDR (mx
), env
);
452 /* Push the prompt onto the dynamic stack. */
453 scm_dynstack_push_prompt (&SCM_I_CURRENT_THREAD
->dynstack
,
454 SCM_F_DYNSTACK_PROMPT_ESCAPE_ONLY
455 | SCM_F_DYNSTACK_PROMPT_PUSH_NARGS
,
457 vp
->fp
- vp
->stack_base
,
458 vp
->sp
- vp
->stack_base
,
462 if (SCM_I_SETJMP (registers
))
464 /* The prompt exited nonlocally. */
465 scm_gc_after_nonlocal_exit ();
468 args
= scm_i_prompt_pop_abort_args_x (vp
);
472 res
= scm_call_0 (eval (CADR (mx
), env
));
473 scm_dynstack_pop (&SCM_I_CURRENT_THREAD
->dynstack
);
484 /* Simple procedure calls
488 scm_call_0 (SCM proc
)
490 return scm_call_n (proc
, NULL
, 0);
494 scm_call_1 (SCM proc
, SCM arg1
)
496 return scm_call_n (proc
, &arg1
, 1);
500 scm_call_2 (SCM proc
, SCM arg1
, SCM arg2
)
502 SCM args
[] = { arg1
, arg2
};
503 return scm_call_n (proc
, args
, 2);
507 scm_call_3 (SCM proc
, SCM arg1
, SCM arg2
, SCM arg3
)
509 SCM args
[] = { arg1
, arg2
, arg3
};
510 return scm_call_n (proc
, args
, 3);
514 scm_call_4 (SCM proc
, SCM arg1
, SCM arg2
, SCM arg3
, SCM arg4
)
516 SCM args
[] = { arg1
, arg2
, arg3
, arg4
};
517 return scm_call_n (proc
, args
, 4);
521 scm_call_5 (SCM proc
, SCM arg1
, SCM arg2
, SCM arg3
, SCM arg4
, SCM arg5
)
523 SCM args
[] = { arg1
, arg2
, arg3
, arg4
, arg5
};
524 return scm_call_n (proc
, args
, 5);
528 scm_call_6 (SCM proc
, SCM arg1
, SCM arg2
, SCM arg3
, SCM arg4
, SCM arg5
,
531 SCM args
[] = { arg1
, arg2
, arg3
, arg4
, arg5
, arg6
};
532 return scm_call_n (proc
, args
, 6);
536 scm_call_7 (SCM proc
, SCM arg1
, SCM arg2
, SCM arg3
, SCM arg4
, SCM arg5
,
539 SCM args
[] = { arg1
, arg2
, arg3
, arg4
, arg5
, arg6
, arg7
};
540 return scm_call_n (proc
, args
, 7);
544 scm_call_8 (SCM proc
, SCM arg1
, SCM arg2
, SCM arg3
, SCM arg4
, SCM arg5
,
545 SCM arg6
, SCM arg7
, SCM arg8
)
547 SCM args
[] = { arg1
, arg2
, arg3
, arg4
, arg5
, arg6
, arg7
, arg8
};
548 return scm_call_n (proc
, args
, 8);
552 scm_call_9 (SCM proc
, SCM arg1
, SCM arg2
, SCM arg3
, SCM arg4
, SCM arg5
,
553 SCM arg6
, SCM arg7
, SCM arg8
, SCM arg9
)
555 SCM args
[] = { arg1
, arg2
, arg3
, arg4
, arg5
, arg6
, arg7
, arg8
, arg9
};
556 return scm_call_n (proc
, args
, 9);
559 /* scm_call_n defined in vm.c */
562 scm_call (SCM proc
, ...)
568 va_start (argp
, proc
);
569 while (!SCM_UNBNDP (va_arg (argp
, SCM
)))
573 argv
= alloca (nargs
* sizeof (SCM
));
574 va_start (argp
, proc
);
575 for (i
= 0; i
< nargs
; i
++)
576 argv
[i
] = va_arg (argp
, SCM
);
579 return scm_call_n (proc
, argv
, nargs
);
582 /* Simple procedure applies
586 scm_apply_0 (SCM proc
, SCM args
)
591 nargs
= scm_ilength (args
);
592 if (SCM_UNLIKELY (nargs
< 0))
593 scm_wrong_type_arg_msg ("apply", 2, args
, "list");
595 /* FIXME: Use vm_builtin_apply instead of alloca. */
596 argv
= alloca (nargs
* sizeof(SCM
));
597 for (i
= 0; i
< nargs
; i
++)
599 argv
[i
] = SCM_CAR (args
);
600 args
= SCM_CDR (args
);
603 return scm_call_n (proc
, argv
, nargs
);
607 scm_apply_1 (SCM proc
, SCM arg1
, SCM args
)
609 return scm_apply_0 (proc
, scm_cons (arg1
, args
));
613 scm_apply_2 (SCM proc
, SCM arg1
, SCM arg2
, SCM args
)
615 return scm_apply_0 (proc
, scm_cons2 (arg1
, arg2
, args
));
619 scm_apply_3 (SCM proc
, SCM arg1
, SCM arg2
, SCM arg3
, SCM args
)
621 return scm_apply_0 (proc
, scm_cons (arg1
, scm_cons2 (arg2
, arg3
, args
)));
624 static SCM map_var
, for_each_var
;
626 static void init_map_var (void)
628 map_var
= scm_private_variable (scm_the_root_module (),
629 scm_from_latin1_symbol ("map"));
632 static void init_for_each_var (void)
634 for_each_var
= scm_private_variable (scm_the_root_module (),
635 scm_from_latin1_symbol ("for-each"));
639 scm_map (SCM proc
, SCM arg1
, SCM args
)
641 static scm_i_pthread_once_t once
= SCM_I_PTHREAD_ONCE_INIT
;
642 scm_i_pthread_once (&once
, init_map_var
);
644 return scm_apply_0 (scm_variable_ref (map_var
),
645 scm_cons (proc
, scm_cons (arg1
, args
)));
649 scm_for_each (SCM proc
, SCM arg1
, SCM args
)
651 static scm_i_pthread_once_t once
= SCM_I_PTHREAD_ONCE_INIT
;
652 scm_i_pthread_once (&once
, init_for_each_var
);
654 return scm_apply_0 (scm_variable_ref (for_each_var
),
655 scm_cons (proc
, scm_cons (arg1
, args
)));
660 scm_c_primitive_eval (SCM exp
)
662 if (!SCM_EXPANDED_P (exp
))
663 exp
= scm_call_1 (scm_current_module_transformer (), exp
);
664 return eval (scm_memoize_expression (exp
), SCM_BOOL_F
);
667 static SCM var_primitive_eval
;
669 scm_primitive_eval (SCM exp
)
671 return scm_call_n (scm_variable_ref (var_primitive_eval
),
676 /* Eval does not take the second arg optionally. This is intentional
677 * in order to be R5RS compatible, and to prepare for the new module
678 * system, where we would like to make the choice of evaluation
679 * environment explicit. */
681 SCM_DEFINE (scm_eval
, "eval", 2, 0, 0,
682 (SCM exp
, SCM module_or_state
),
683 "Evaluate @var{exp}, a list representing a Scheme expression,\n"
684 "in the top-level environment specified by\n"
685 "@var{module_or_state}.\n"
686 "While @var{exp} is evaluated (using @code{primitive-eval}),\n"
687 "@var{module_or_state} is made the current module when\n"
688 "it is a module, or the current dynamic state when it is\n"
690 "Example: (eval '(+ 1 2) (interaction-environment))")
691 #define FUNC_NAME s_scm_eval
695 scm_dynwind_begin (SCM_F_DYNWIND_REWINDABLE
);
696 if (scm_is_dynamic_state (module_or_state
))
697 scm_dynwind_current_dynamic_state (module_or_state
);
698 else if (scm_module_system_booted_p
)
700 SCM_VALIDATE_MODULE (2, module_or_state
);
701 scm_dynwind_current_module (module_or_state
);
703 /* otherwise if the module system isn't booted, ignore the module arg */
705 res
= scm_primitive_eval (exp
);
715 /* Apply a function to a list of arguments.
717 This function's interface is a bit wonly. It takes two required
718 arguments and a tail argument, as if it were:
720 (lambda (proc arg1 . args) ...)
722 Usually you want to use scm_apply_0 or one of its cousins. */
725 scm_apply (SCM proc
, SCM arg1
, SCM args
)
727 return scm_apply_0 (proc
,
728 scm_is_null (args
) ? arg1
: scm_cons_star (arg1
, args
));
732 prepare_boot_closure_env_for_apply (SCM proc
, SCM args
,
733 SCM
*out_body
, SCM
*out_env
)
735 int nreq
= BOOT_CLOSURE_NUM_REQUIRED_ARGS (proc
);
736 SCM env
= BOOT_CLOSURE_ENV (proc
);
739 if (BOOT_CLOSURE_IS_FIXED (proc
)
740 || (BOOT_CLOSURE_IS_REST (proc
)
741 && !BOOT_CLOSURE_HAS_REST_ARGS (proc
)))
743 if (SCM_UNLIKELY (scm_ilength (args
) != nreq
))
744 scm_wrong_num_args (proc
);
746 env
= make_env (nreq
, SCM_UNDEFINED
, env
);
747 for (i
= 0; i
< nreq
; args
= CDR (args
), i
++)
748 env_set (env
, 0, i
, CAR (args
));
749 *out_body
= BOOT_CLOSURE_BODY (proc
);
752 else if (BOOT_CLOSURE_IS_REST (proc
))
754 if (SCM_UNLIKELY (scm_ilength (args
) < nreq
))
755 scm_wrong_num_args (proc
);
757 env
= make_env (nreq
+ 1, SCM_UNDEFINED
, env
);
758 for (i
= 0; i
< nreq
; args
= CDR (args
), i
++)
759 env_set (env
, 0, i
, CAR (args
));
760 env_set (env
, 0, i
++, args
);
762 *out_body
= BOOT_CLOSURE_BODY (proc
);
767 int i
, argc
, nreq
, nopt
, nenv
;
768 SCM body
, rest
, kw
, inits
, alt
;
769 SCM mx
= BOOT_CLOSURE_CODE (proc
);
772 BOOT_CLOSURE_PARSE_FULL (mx
, body
, nargs
, rest
, nopt
, kw
, inits
, alt
);
774 argc
= scm_ilength (args
);
777 if (scm_is_true (alt
))
783 scm_wrong_num_args (proc
);
785 if (scm_is_false (kw
) && argc
> nreq
+ nopt
&& scm_is_false (rest
))
787 if (scm_is_true (alt
))
793 scm_wrong_num_args (proc
);
795 if (scm_is_true (kw
) && scm_is_false (rest
))
799 for (walk
= args
; scm_is_pair (walk
); walk
= CDR (walk
), npos
++)
800 if (npos
>= nreq
&& scm_is_keyword (CAR (walk
)))
803 if (npos
> nreq
+ nopt
)
805 /* Too many positional args and no rest arg. */
806 if (scm_is_true (alt
))
812 scm_wrong_num_args (proc
);
816 /* At this point we are committed to the chosen clause. */
817 nenv
= nreq
+ (scm_is_true (rest
) ? 1 : 0) + scm_ilength (inits
);
818 env
= make_env (nenv
, SCM_UNDEFINED
, env
);
820 for (i
= 0; i
< nreq
; i
++, args
= CDR (args
))
821 env_set (env
, 0, i
, CAR (args
));
823 if (scm_is_false (kw
))
825 /* Optional args (possibly), but no keyword args. */
826 for (; i
< argc
&& i
< nreq
+ nopt
;
827 i
++, args
= CDR (args
), inits
= CDR (inits
))
828 env_set (env
, 0, i
, CAR (args
));
830 for (; i
< nreq
+ nopt
; i
++, inits
= CDR (inits
))
831 env_set (env
, 0, i
, EVAL1 (CAR (inits
), env
));
833 if (scm_is_true (rest
))
834 env_set (env
, 0, i
++, args
);
843 /* Optional args. As before, but stop at the first keyword. */
844 for (; i
< argc
&& i
< nreq
+ nopt
&& !scm_is_keyword (CAR (args
));
845 i
++, args
= CDR (args
), inits
= CDR (inits
))
846 env_set (env
, 0, i
, CAR (args
));
848 for (; i
< nreq
+ nopt
; i
++, inits
= CDR (inits
))
849 env_set (env
, 0, i
, EVAL1 (CAR (inits
), env
));
851 if (scm_is_true (rest
))
852 env_set (env
, 0, i
++, args
);
854 /* Parse keyword args. */
856 int kw_start_idx
= i
;
859 if (scm_is_pair (args
) && scm_is_pair (CDR (args
)))
860 for (; scm_is_pair (args
) && scm_is_pair (CDR (args
));
863 SCM k
= CAR (args
), v
= CADR (args
);
864 if (!scm_is_keyword (k
))
866 if (scm_is_true (rest
))
871 for (walk
= kw
; scm_is_pair (walk
); walk
= CDR (walk
))
872 if (scm_is_eq (k
, CAAR (walk
)))
874 env_set (env
, 0, SCM_I_INUM (CDAR (walk
)), v
);
878 if (scm_is_null (walk
) && scm_is_false (aok
))
879 error_unrecognized_keyword (proc
, k
);
881 if (scm_is_pair (args
) && scm_is_false (rest
))
882 error_invalid_keyword (proc
, CAR (args
));
884 /* Now fill in unbound values, evaluating init expressions in their
885 appropriate environment. */
886 for (i
= kw_start_idx
; scm_is_pair (inits
); i
++, inits
= CDR (inits
))
887 if (SCM_UNBNDP (env_ref (env
, 0, i
)))
888 env_set (env
, 0, i
, EVAL1 (CAR (inits
), env
));
892 if (!scm_is_null (inits
))
903 prepare_boot_closure_env_for_eval (SCM proc
, unsigned int argc
,
904 SCM exps
, SCM
*out_body
, SCM
*inout_env
)
906 int nreq
= BOOT_CLOSURE_NUM_REQUIRED_ARGS (proc
);
907 SCM new_env
= BOOT_CLOSURE_ENV (proc
);
908 if ((BOOT_CLOSURE_IS_FIXED (proc
)
909 || (BOOT_CLOSURE_IS_REST (proc
)
910 && !BOOT_CLOSURE_HAS_REST_ARGS (proc
)))
915 new_env
= make_env (nreq
, SCM_UNDEFINED
, new_env
);
916 for (i
= 0; i
< nreq
; exps
= CDR (exps
), i
++)
917 env_set (new_env
, 0, i
, EVAL1 (CAR (exps
), *inout_env
));
919 *out_body
= BOOT_CLOSURE_BODY (proc
);
920 *inout_env
= new_env
;
922 else if (BOOT_CLOSURE_IS_REST (proc
) && argc
>= nreq
)
927 new_env
= make_env (nreq
+ 1, SCM_UNDEFINED
, new_env
);
928 for (i
= 0; i
< nreq
; exps
= CDR (exps
), i
++)
929 env_set (new_env
, 0, i
, EVAL1 (CAR (exps
), *inout_env
));
930 for (rest
= SCM_EOL
; scm_is_pair (exps
); exps
= CDR (exps
))
931 rest
= scm_cons (EVAL1 (CAR (exps
), *inout_env
), rest
);
932 env_set (new_env
, 0, i
++, scm_reverse_x (rest
, SCM_UNDEFINED
));
934 *out_body
= BOOT_CLOSURE_BODY (proc
);
935 *inout_env
= new_env
;
940 for (; scm_is_pair (exps
); exps
= CDR (exps
))
941 args
= scm_cons (EVAL1 (CAR (exps
), *inout_env
), args
);
942 args
= scm_reverse_x (args
, SCM_UNDEFINED
);
943 prepare_boot_closure_env_for_apply (proc
, args
, out_body
, inout_env
);
948 boot_closure_apply (SCM closure
, SCM args
)
951 prepare_boot_closure_env_for_apply (closure
, args
, &body
, &env
);
952 return eval (body
, env
);
956 boot_closure_print (SCM closure
, SCM port
, scm_print_state
*pstate
)
959 scm_puts_unlocked ("#<boot-closure ", port
);
960 scm_uintprint (SCM_UNPACK (closure
), 16, port
);
961 scm_putc_unlocked (' ', port
);
962 args
= scm_make_list (scm_from_int (BOOT_CLOSURE_NUM_REQUIRED_ARGS (closure
)),
963 scm_from_latin1_symbol ("_"));
964 if (!BOOT_CLOSURE_IS_FIXED (closure
) && BOOT_CLOSURE_HAS_REST_ARGS (closure
))
965 args
= scm_cons_star (scm_from_latin1_symbol ("_"), args
);
966 /* FIXME: optionals and rests */
967 scm_display (args
, port
);
968 scm_putc_unlocked ('>', port
);
977 f_apply
= scm_c_define_gsubr ("apply", 2, 0, 1, scm_apply
);
979 scm_tc16_boot_closure
= scm_make_smob_type ("boot-closure", 0);
980 scm_set_smob_apply (scm_tc16_boot_closure
, boot_closure_apply
, 0, 0, 1);
981 scm_set_smob_print (scm_tc16_boot_closure
, boot_closure_print
);
983 primitive_eval
= scm_c_make_gsubr ("primitive-eval", 1, 0, 0,
984 scm_c_primitive_eval
);
985 var_primitive_eval
= scm_define (SCM_SUBR_NAME (primitive_eval
),
988 #include "libguile/eval.x"