[bpt/guile.git] / libguile / eval.h

/* classes: h_files */

#ifndef EVALH
#define EVALH
/*	Copyright (C) 1995,1996,1998 Free Software Foundation, Inc.
 * 
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this software; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307 USA
 *
 * As a special exception, the Free Software Foundation gives permission
 * for additional uses of the text contained in its release of GUILE.
 *
 * The exception is that, if you link the GUILE library with other files
 * to produce an executable, this does not by itself cause the
 * resulting executable to be covered by the GNU General Public License.
 * Your use of that executable is in no way restricted on account of
 * linking the GUILE library code into it.
 *
 * This exception does not however invalidate any other reasons why
 * the executable file might be covered by the GNU General Public License.
 *
 * This exception applies only to the code released by the
 * Free Software Foundation under the name GUILE.  If you copy
 * code from other Free Software Foundation releases into a copy of
 * GUILE, as the General Public License permits, the exception does
 * not apply to the code that you add in this way.  To avoid misleading
 * anyone as to the status of such modified files, you must delete
 * this exception notice from them.
 *
 * If you write modifications of your own for GUILE, it is your choice
 * whether to permit this exception to apply to your modifications.
 * If you do not wish that, delete this exception notice.  */
\f

#include "libguile/__scm.h"

\f

/* {Options}
 */

extern scm_option scm_eval_opts[];

#define SCM_EVAL_STACK	       scm_eval_opts[0].val
#define SCM_N_EVAL_OPTIONS 1

extern int scm_eval_stack;

extern scm_option scm_evaluator_trap_table[];

extern SCM scm_eval_options_interface SCM_P ((SCM setting));

#define SCM_TRAPS_P	       scm_evaluator_trap_table[0].val
#define SCM_ENTER_FRAME_P      scm_evaluator_trap_table[1].val
#define SCM_APPLY_FRAME_P      scm_evaluator_trap_table[2].val
#define SCM_EXIT_FRAME_P       scm_evaluator_trap_table[3].val
#define SCM_N_EVALUATOR_TRAPS 4

\f

/* {Ilocs}
 *
 * Ilocs are relative pointers into local environment structures.
 * 
 */
#define SCM_ILOCP(n)		(SCM_ITAG8(n)==scm_tc8_iloc)
#define SCM_ILOC00		SCM_MAKE_ITAG8(0L, scm_tc8_iloc)
#define SCM_IDINC		(0x00100000L)
#define SCM_ICDR		(0x00080000L)
#define SCM_IFRINC		(0x00000100L)
#define SCM_IDSTMSK		(-SCM_IDINC)
#define SCM_IFRAME(n) 		((int)((SCM_ICDR-SCM_IFRINC)>>8) & ((int)(n)>>8))
#define SCM_IDIST(n) 		(((unsigned long)(n))>>20)
#define SCM_ICDRP(n) 		(SCM_ICDR & (n))

\f


/* {Evaluator}
 *
 * For an explanation of symbols containing "EVAL", see beginning of eval.c.
 */
#ifdef MEMOIZE_LOCALS
#define SCM_EVALIM(x, env) (SCM_ILOCP(x)?*scm_ilookup((x), env):x)
#else
#define SCM_EVALIM(x, env) x
#endif
#ifdef DEBUG_EXTENSIONS
#define SCM_XEVAL(x, env) (SCM_IMP(x) \
		      ? (x) \
		      : (*scm_ceval_ptr) ((x), (env)))
#define SCM_XEVALCAR(x, env) (SCM_NCELLP(SCM_CAR(x)) \
			  ? (SCM_IMP(SCM_CAR(x)) \
			     ? SCM_EVALIM(SCM_CAR(x), env) \
			     : SCM_GLOC_VAL(SCM_CAR(x))) \
			  : (SCM_SYMBOLP(SCM_CAR(x)) \
			     ? *scm_lookupcar(x, env) \
			     : (*scm_ceval_ptr) (SCM_CAR(x), env)))
#else
#define SCM_XEVAL(x, env) (SCM_IMP(x)?(x):scm_ceval((x), (env)))
#define SCM_XEVALCAR(x, env) EVALCAR(x, env)
#endif /* DEBUG_EXTENSIONS */

\f

#define SCM_EXTEND_ENV scm_acons

\f
extern const char scm_s_expression[];
extern const char scm_s_test[];
extern const char scm_s_body[];
extern const char scm_s_bindings[];
extern const char scm_s_variable[];
extern const char scm_s_clauses[];
extern const char scm_s_formals[];

extern SCM scm_i_dot;
extern SCM scm_i_quote;
extern SCM scm_i_quasiquote;
extern SCM scm_i_lambda;
extern SCM scm_i_let;
extern SCM scm_i_arrow;
extern SCM scm_i_else;
extern SCM scm_i_unquote;
extern SCM scm_i_uq_splicing;
extern SCM scm_i_apply;

extern long scm_tc16_macro;

/* A resolved global variable reference in the CAR position
 * of a list is stored (in code only) as a pointer to a pair with a 
 * tag of 1.  This is called a "gloc".
 */

#define SCM_GLOC_SYM(x) (SCM_CAR((x)-1L))
#define SCM_GLOC_VAL(x) (SCM_CDR((x)-1L))
#define SCM_GLOC_VAL_LOC(x) (SCM_CDRLOC((x)-1L))

\f

extern SCM * scm_ilookup SCM_P ((SCM iloc, SCM env));
extern SCM * scm_lookupcar SCM_P ((SCM vloc, SCM genv));
extern SCM scm_unmemocar SCM_P ((SCM form, SCM env));
extern SCM scm_unmemocopy SCM_P ((SCM form, SCM env));
extern SCM scm_eval_car SCM_P ((SCM pair, SCM env));
extern SCM scm_eval_args SCM_P ((SCM i, SCM env, SCM proc));
extern SCM scm_deval_args SCM_P ((SCM l, SCM env, SCM proc, SCM *lloc));
extern SCM scm_m_quote SCM_P ((SCM xorig, SCM env));
extern SCM scm_m_begin SCM_P ((SCM xorig, SCM env));
extern SCM scm_m_if SCM_P ((SCM xorig, SCM env));
extern SCM scm_m_set SCM_P ((SCM xorig, SCM env));
extern SCM scm_m_vref SCM_P ((SCM xorig, SCM env));
extern SCM scm_m_vset SCM_P ((SCM xorig, SCM env));
extern SCM scm_m_and SCM_P ((SCM xorig, SCM env));
extern SCM scm_m_or SCM_P ((SCM xorig, SCM env));
extern SCM scm_m_case SCM_P ((SCM xorig, SCM env));
extern SCM scm_m_cond SCM_P ((SCM xorig, SCM env));
extern SCM scm_m_lambda SCM_P ((SCM xorig, SCM env));
extern SCM scm_m_letstar SCM_P ((SCM xorig, SCM env));
extern SCM scm_m_do SCM_P ((SCM xorig, SCM env));
extern SCM scm_m_quasiquote SCM_P ((SCM xorig, SCM env));
extern SCM scm_m_delay SCM_P ((SCM xorig, SCM env));
extern SCM scm_m_define SCM_P ((SCM x, SCM env));
extern SCM scm_m_letrec SCM_P ((SCM xorig, SCM env));
extern SCM scm_m_let SCM_P ((SCM xorig, SCM env));
extern SCM scm_m_apply SCM_P ((SCM xorig, SCM env));
extern SCM scm_m_cont SCM_P ((SCM xorig, SCM env));
extern int scm_badargsp SCM_P ((SCM formals, SCM args));
extern SCM scm_ceval SCM_P ((SCM x, SCM env));
extern SCM scm_deval SCM_P ((SCM x, SCM env));
extern SCM scm_nconc2last SCM_P ((SCM lst));
extern SCM scm_apply SCM_P ((SCM proc, SCM arg1, SCM args));
extern SCM scm_dapply SCM_P ((SCM proc, SCM arg1, SCM args));
extern SCM SCM_APPLY SCM_P ((SCM proc, SCM arg1, SCM args));
extern SCM scm_map SCM_P ((SCM proc, SCM arg1, SCM args));
extern SCM scm_for_each SCM_P ((SCM proc, SCM arg1, SCM args));
extern SCM scm_closure SCM_P ((SCM code, SCM env));
extern SCM scm_makprom SCM_P ((SCM code));
extern SCM scm_force SCM_P ((SCM x));
extern SCM scm_promise_p SCM_P ((SCM x));
extern SCM scm_copy_tree SCM_P ((SCM obj));
extern SCM scm_eval_3 SCM_P ((SCM obj, int copyp, SCM env));
extern SCM scm_env_top_level SCM_P ((SCM env));
extern SCM scm_top_level_env SCM_P ((SCM thunk));
extern SCM scm_eval2 SCM_P ((SCM obj, SCM env_thunk));
extern SCM scm_eval SCM_P ((SCM obj));
extern SCM scm_eval_x SCM_P ((SCM obj));
extern void scm_init_eval SCM_P ((void));

#endif  /* EVALH */
Commit	Line	Data
0f2d19dd JB	1	/* classes: h_files */
	2
	3	#ifndef EVALH
	4	#define EVALH
7dc6e754	5	/* Copyright (C) 1995,1996,1998 Free Software Foundation, Inc.
0f2d19dd JB	6	*
	7	* This program 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)
	10	* any later version.
	11	*
	12	* This program 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.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this software; see the file COPYING. If not, write to
82892bed JB	19	* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
82892bed JB	20	* Boston, MA 02111-1307 USA
0f2d19dd JB	21	*
	22	* As a special exception, the Free Software Foundation gives permission
	23	* for additional uses of the text contained in its release of GUILE.
	24	*
	25	* The exception is that, if you link the GUILE library with other files
	26	* to produce an executable, this does not by itself cause the
	27	* resulting executable to be covered by the GNU General Public License.
	28	* Your use of that executable is in no way restricted on account of
	29	* linking the GUILE library code into it.
	30	*
	31	* This exception does not however invalidate any other reasons why
	32	* the executable file might be covered by the GNU General Public License.
	33	*
	34	* This exception applies only to the code released by the
	35	* Free Software Foundation under the name GUILE. If you copy
	36	* code from other Free Software Foundation releases into a copy of
	37	* GUILE, as the General Public License permits, the exception does
	38	* not apply to the code that you add in this way. To avoid misleading
	39	* anyone as to the status of such modified files, you must delete
	40	* this exception notice from them.
	41	*
	42	* If you write modifications of your own for GUILE, it is your choice
	43	* whether to permit this exception to apply to your modifications.
82892bed	44	* If you do not wish that, delete this exception notice. */
0f2d19dd JB	45	\f
0f2d19dd JB	46
b4309c3c	47	#include "libguile/__scm.h"
0f2d19dd JB	48
	49	\f
	50
33b97402 MD	51	/* {Options}
	52	*/
	53
	54	extern scm_option scm_eval_opts[];
	55
	56	#define SCM_EVAL_STACK scm_eval_opts[0].val
	57	#define SCM_N_EVAL_OPTIONS 1
	58
2c2b0670	59	extern int scm_eval_stack;
a74145b8	60
33b97402 MD	61	extern scm_option scm_evaluator_trap_table[];
33b97402 MD	62
38b9c0c3 JB	63	extern SCM scm_eval_options_interface SCM_P ((SCM setting));
38b9c0c3 JB	64
066dacf8 MD	65	#define SCM_TRAPS_P scm_evaluator_trap_table[0].val
	66	#define SCM_ENTER_FRAME_P scm_evaluator_trap_table[1].val
	67	#define SCM_APPLY_FRAME_P scm_evaluator_trap_table[2].val
	68	#define SCM_EXIT_FRAME_P scm_evaluator_trap_table[3].val
	69	#define SCM_N_EVALUATOR_TRAPS 4
33b97402 MD	70
	71	\f
	72
0f2d19dd JB	73	/* {Ilocs}
	74	*
	75	* Ilocs are relative pointers into local environment structures.
	76	*
	77	*/
	78	#define SCM_ILOCP(n) (SCM_ITAG8(n)==scm_tc8_iloc)
	79	#define SCM_ILOC00 SCM_MAKE_ITAG8(0L, scm_tc8_iloc)
	80	#define SCM_IDINC (0x00100000L)
	81	#define SCM_ICDR (0x00080000L)
	82	#define SCM_IFRINC (0x00000100L)
	83	#define SCM_IDSTMSK (-SCM_IDINC)
	84	#define SCM_IFRAME(n) ((int)((SCM_ICDR-SCM_IFRINC)>>8) & ((int)(n)>>8))
	85	#define SCM_IDIST(n) (((unsigned long)(n))>>20)
	86	#define SCM_ICDRP(n) (SCM_ICDR & (n))
	87
	88	\f
	89
	90
8d1e7f8c MD	91	/* {Evaluator}
	92	*
	93	* For an explanation of symbols containing "EVAL", see beginning of eval.c.
	94	*/
2a758f6f MD	95	#ifdef MEMOIZE_LOCALS
	96	#define SCM_EVALIM(x, env) (SCM_ILOCP(x)?*scm_ilookup((x), env):x)
	97	#else
	98	#define SCM_EVALIM(x, env) x
	99	#endif
0f2d19dd	100	#ifdef DEBUG_EXTENSIONS
2a758f6f	101	#define SCM_XEVAL(x, env) (SCM_IMP(x) \
0f2d19dd JB	102	? (x) \
0f2d19dd JB	103	: (*scm_ceval_ptr) ((x), (env)))
2a758f6f MD	104	#define SCM_XEVALCAR(x, env) (SCM_NCELLP(SCM_CAR(x)) \
	105	? (SCM_IMP(SCM_CAR(x)) \
	106	? SCM_EVALIM(SCM_CAR(x), env) \
	107	: SCM_GLOC_VAL(SCM_CAR(x))) \
	108	: (SCM_SYMBOLP(SCM_CAR(x)) \
	109	? *scm_lookupcar(x, env) \
	110	: (*scm_ceval_ptr) (SCM_CAR(x), env)))
0f2d19dd	111	#else
2a758f6f MD	112	#define SCM_XEVAL(x, env) (SCM_IMP(x)?(x):scm_ceval((x), (env)))
2a758f6f MD	113	#define SCM_XEVALCAR(x, env) EVALCAR(x, env)
0f2d19dd JB	114	#endif /* DEBUG_EXTENSIONS */
0f2d19dd JB	115
0f2d19dd JB	116	\f
0f2d19dd JB	117
e2806c10	118	#define SCM_EXTEND_ENV scm_acons
0f2d19dd JB	119
0f2d19dd JB	120	\f
3eeba8d4 JB	121	extern const char scm_s_expression[];
	122	extern const char scm_s_test[];
	123	extern const char scm_s_body[];
	124	extern const char scm_s_bindings[];
	125	extern const char scm_s_variable[];
	126	extern const char scm_s_clauses[];
	127	extern const char scm_s_formals[];
2a758f6f	128
0f2d19dd JB	129	extern SCM scm_i_dot;
	130	extern SCM scm_i_quote;
	131	extern SCM scm_i_quasiquote;
	132	extern SCM scm_i_lambda;
	133	extern SCM scm_i_let;
	134	extern SCM scm_i_arrow;
	135	extern SCM scm_i_else;
	136	extern SCM scm_i_unquote;
	137	extern SCM scm_i_uq_splicing;
	138	extern SCM scm_i_apply;
0f2d19dd	139
7332df66	140	extern long scm_tc16_macro;
0f2d19dd JB	141
	142	/* A resolved global variable reference in the CAR position
	143	* of a list is stored (in code only) as a pointer to a pair with a
	144	* tag of 1. This is called a "gloc".
	145	*/
	146
	147	#define SCM_GLOC_SYM(x) (SCM_CAR((x)-1L))
	148	#define SCM_GLOC_VAL(x) (SCM_CDR((x)-1L))
e6d34cb6	149	#define SCM_GLOC_VAL_LOC(x) (SCM_CDRLOC((x)-1L))
0f2d19dd JB	150
0f2d19dd JB	151	\f
1cc91f1b JB	152
	153	extern SCM * scm_ilookup SCM_P ((SCM iloc, SCM env));
	154	extern SCM * scm_lookupcar SCM_P ((SCM vloc, SCM genv));
	155	extern SCM scm_unmemocar SCM_P ((SCM form, SCM env));
	156	extern SCM scm_unmemocopy SCM_P ((SCM form, SCM env));
	157	extern SCM scm_eval_car SCM_P ((SCM pair, SCM env));
680ed4a8 MD	158	extern SCM scm_eval_args SCM_P ((SCM i, SCM env, SCM proc));
680ed4a8 MD	159	extern SCM scm_deval_args SCM_P ((SCM l, SCM env, SCM proc, SCM *lloc));
1cc91f1b JB	160	extern SCM scm_m_quote SCM_P ((SCM xorig, SCM env));
	161	extern SCM scm_m_begin SCM_P ((SCM xorig, SCM env));
	162	extern SCM scm_m_if SCM_P ((SCM xorig, SCM env));
	163	extern SCM scm_m_set SCM_P ((SCM xorig, SCM env));
	164	extern SCM scm_m_vref SCM_P ((SCM xorig, SCM env));
	165	extern SCM scm_m_vset SCM_P ((SCM xorig, SCM env));
	166	extern SCM scm_m_and SCM_P ((SCM xorig, SCM env));
	167	extern SCM scm_m_or SCM_P ((SCM xorig, SCM env));
	168	extern SCM scm_m_case SCM_P ((SCM xorig, SCM env));
	169	extern SCM scm_m_cond SCM_P ((SCM xorig, SCM env));
	170	extern SCM scm_m_lambda SCM_P ((SCM xorig, SCM env));
	171	extern SCM scm_m_letstar SCM_P ((SCM xorig, SCM env));
	172	extern SCM scm_m_do SCM_P ((SCM xorig, SCM env));
	173	extern SCM scm_m_quasiquote SCM_P ((SCM xorig, SCM env));
	174	extern SCM scm_m_delay SCM_P ((SCM xorig, SCM env));
	175	extern SCM scm_m_define SCM_P ((SCM x, SCM env));
	176	extern SCM scm_m_letrec SCM_P ((SCM xorig, SCM env));
	177	extern SCM scm_m_let SCM_P ((SCM xorig, SCM env));
	178	extern SCM scm_m_apply SCM_P ((SCM xorig, SCM env));
	179	extern SCM scm_m_cont SCM_P ((SCM xorig, SCM env));
1cc91f1b JB	180	extern int scm_badargsp SCM_P ((SCM formals, SCM args));
	181	extern SCM scm_ceval SCM_P ((SCM x, SCM env));
	182	extern SCM scm_deval SCM_P ((SCM x, SCM env));
1cc91f1b JB	183	extern SCM scm_nconc2last SCM_P ((SCM lst));
	184	extern SCM scm_apply SCM_P ((SCM proc, SCM arg1, SCM args));
	185	extern SCM scm_dapply SCM_P ((SCM proc, SCM arg1, SCM args));
	186	extern SCM SCM_APPLY SCM_P ((SCM proc, SCM arg1, SCM args));
	187	extern SCM scm_map SCM_P ((SCM proc, SCM arg1, SCM args));
	188	extern SCM scm_for_each SCM_P ((SCM proc, SCM arg1, SCM args));
	189	extern SCM scm_closure SCM_P ((SCM code, SCM env));
	190	extern SCM scm_makprom SCM_P ((SCM code));
1cc91f1b JB	191	extern SCM scm_force SCM_P ((SCM x));
	192	extern SCM scm_promise_p SCM_P ((SCM x));
	193	extern SCM scm_copy_tree SCM_P ((SCM obj));
	194	extern SCM scm_eval_3 SCM_P ((SCM obj, int copyp, SCM env));
2a758f6f	195	extern SCM scm_env_top_level SCM_P ((SCM env));
1cc91f1b JB	196	extern SCM scm_top_level_env SCM_P ((SCM thunk));
	197	extern SCM scm_eval2 SCM_P ((SCM obj, SCM env_thunk));
	198	extern SCM scm_eval SCM_P ((SCM obj));
	199	extern SCM scm_eval_x SCM_P ((SCM obj));
1cc91f1b	200	extern void scm_init_eval SCM_P ((void));
0f2d19dd JB	201
0f2d19dd JB	202	#endif /* EVALH */