5 /* Copyright (C) 1995, 1996 ,1998, 1999 Free Software Foundation, Inc.
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)
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.
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
19 * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
20 * Boston, MA 02111-1307 USA
22 * As a special exception, the Free Software Foundation gives permission
23 * for additional uses of the text contained in its release of GUILE.
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.
31 * This exception does not however invalidate any other reasons why
32 * the executable file might be covered by the GNU General Public License.
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.
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.
44 * If you do not wish that, delete this exception notice. */
47 #include "libguile/__scm.h"
54 extern scm_option scm_eval_opts
[];
56 #define SCM_EVAL_STACK scm_eval_opts[0].val
57 #define SCM_N_EVAL_OPTIONS 1
59 extern int scm_eval_stack
;
61 extern scm_option scm_evaluator_trap_table
[];
63 extern SCM
scm_eval_options_interface (SCM setting
);
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
75 * Ilocs are relative pointers into local environment structures.
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) \
85 & (SCM_UNPACK (n) >> 8))
86 #define SCM_IDIST(n) (SCM_UNPACK (n) >> 20)
87 #define SCM_ICDRP(n) (SCM_ICDR & SCM_UNPACK (n))
94 * For an explanation of symbols containing "EVAL", see beginning of eval.c.
97 #define SCM_EVALIM(x, env) (SCM_ILOCP (x) ? *scm_ilookup ((x), env) : x)
99 #define SCM_EVALIM(x, env) x
101 #ifdef DEBUG_EXTENSIONS
102 #define SCM_XEVAL(x, env) (SCM_IMP (x) \
104 : (*scm_ceval_ptr) ((x), (env)))
105 #define SCM_XEVALCAR(x, env) (SCM_NCELLP (SCM_CAR (x)) \
106 ? (SCM_IMP (SCM_CAR (x)) \
107 ? SCM_EVALIM (SCM_CAR (x), env) \
108 : SCM_GLOC_VAL (SCM_CAR (x))) \
109 : (SCM_SYMBOLP (SCM_CAR (x)) \
110 ? *scm_lookupcar (x, env, 1) \
111 : (*scm_ceval_ptr) (SCM_CAR (x), env)))
113 #define SCM_XEVAL(x, env) (SCM_IMP (x) ? (x) : scm_ceval ((x), (env)))
114 #define SCM_XEVALCAR(x, env) EVALCAR (x, env)
115 #endif /* DEBUG_EXTENSIONS */
119 #define SCM_EXTEND_ENV scm_acons
122 extern const char scm_s_expression
[];
123 extern const char scm_s_test
[];
124 extern const char scm_s_body
[];
125 extern const char scm_s_bindings
[];
126 extern const char scm_s_variable
[];
127 extern const char scm_s_clauses
[];
128 extern const char scm_s_formals
[];
129 extern const char scm_s_set_x
[];
131 extern SCM scm_sym_and
;
132 extern SCM scm_sym_begin
;
133 extern SCM scm_sym_case
;
134 extern SCM scm_sym_cond
;
135 extern SCM scm_sym_define
;
136 extern SCM scm_sym_do
;
137 extern SCM scm_sym_if
;
138 extern SCM scm_sym_lambda
;
139 extern SCM scm_sym_let
;
140 extern SCM scm_sym_letstar
;
141 extern SCM scm_sym_letrec
;
142 extern SCM scm_sym_quote
;
143 extern SCM scm_sym_quasiquote
;
144 extern SCM scm_sym_unquote
;
145 extern SCM scm_sym_uq_splicing
;
147 extern SCM scm_sym_dot
;
148 extern SCM scm_sym_atapply
;
149 extern SCM scm_sym_atcall_cc
;
150 extern SCM scm_sym_delay
;
151 extern SCM scm_sym_arrow
;
152 extern SCM scm_sym_else
;
153 extern SCM scm_sym_apply
;
154 extern SCM scm_sym_set_x
;
155 extern SCM scm_sym_args
;
157 extern SCM scm_f_apply
;
159 extern long scm_tc16_macro
;
161 /* A resolved global variable reference in the CAR position
162 * of a list is stored (in code only) as a pointer to a pair with a
163 * tag of 1. This is called a "gloc".
166 #define SCM_GLOC_SYM(x) (SCM_CAR (SCM_PACK (SCM_UNPACK (x) - 1L)))
167 #define SCM_GLOC_VAL(x) (SCM_CDR (SCM_PACK (SCM_UNPACK (x) - 1L)))
168 #define SCM_GLOC_VAL_LOC(x) (SCM_CDRLOC (SCM_PACK (SCM_UNPACK (x) - 1L)))
172 extern SCM
* scm_ilookup (SCM iloc
, SCM env
);
173 extern SCM
* scm_lookupcar (SCM vloc
, SCM genv
, int check
);
174 extern SCM
scm_unmemocar (SCM form
, SCM env
);
175 extern SCM
scm_unmemocopy (SCM form
, SCM env
);
176 extern SCM
scm_eval_car (SCM pair
, SCM env
);
177 extern SCM
scm_eval_body (SCM code
, SCM env
);
178 extern SCM
scm_eval_args (SCM i
, SCM env
, SCM proc
);
179 extern SCM
scm_deval_args (SCM l
, SCM env
, SCM proc
, SCM
*lloc
);
180 extern SCM
scm_m_quote (SCM xorig
, SCM env
);
181 extern SCM
scm_m_begin (SCM xorig
, SCM env
);
182 extern SCM
scm_m_if (SCM xorig
, SCM env
);
183 extern SCM
scm_m_set_x (SCM xorig
, SCM env
);
184 extern SCM
scm_m_vref (SCM xorig
, SCM env
);
185 extern SCM
scm_m_vset (SCM xorig
, SCM env
);
186 extern SCM
scm_m_and (SCM xorig
, SCM env
);
187 extern SCM
scm_m_or (SCM xorig
, SCM env
);
188 extern SCM
scm_m_case (SCM xorig
, SCM env
);
189 extern SCM
scm_m_cond (SCM xorig
, SCM env
);
190 extern SCM
scm_m_lambda (SCM xorig
, SCM env
);
191 extern SCM
scm_m_letstar (SCM xorig
, SCM env
);
192 extern SCM
scm_m_do (SCM xorig
, SCM env
);
193 extern SCM
scm_m_quasiquote (SCM xorig
, SCM env
);
194 extern SCM
scm_m_delay (SCM xorig
, SCM env
);
195 extern SCM
scm_m_define (SCM x
, SCM env
);
196 extern SCM
scm_m_letrec (SCM xorig
, SCM env
);
197 extern SCM
scm_m_let (SCM xorig
, SCM env
);
198 extern SCM
scm_m_apply (SCM xorig
, SCM env
);
199 extern SCM
scm_m_cont (SCM xorig
, SCM env
);
200 extern SCM
scm_m_nil_cond (SCM xorig
, SCM env
);
201 extern SCM
scm_m_nil_ify (SCM xorig
, SCM env
);
202 extern SCM
scm_m_t_ify (SCM xorig
, SCM env
);
203 extern SCM
scm_m_0_cond (SCM xorig
, SCM env
);
204 extern SCM
scm_m_0_ify (SCM xorig
, SCM env
);
205 extern SCM
scm_m_1_ify (SCM xorig
, SCM env
);
206 extern SCM
scm_m_atfop (SCM xorig
, SCM env
);
207 extern SCM
scm_m_atbind (SCM xorig
, SCM env
);
208 extern int scm_badargsp (SCM formals
, SCM args
);
209 extern SCM
scm_ceval (SCM x
, SCM env
);
210 extern SCM
scm_deval (SCM x
, SCM env
);
211 extern SCM
scm_nconc2last (SCM lst
);
212 extern SCM
scm_apply (SCM proc
, SCM arg1
, SCM args
);
213 extern SCM
scm_dapply (SCM proc
, SCM arg1
, SCM args
);
214 extern SCM
scm_m_expand_body (SCM xorig
, SCM env
);
215 extern SCM
scm_macroexp (SCM x
, SCM env
);
216 extern SCM
scm_map (SCM proc
, SCM arg1
, SCM args
);
217 extern SCM
scm_for_each (SCM proc
, SCM arg1
, SCM args
);
218 extern SCM
scm_closure (SCM code
, SCM env
);
219 extern SCM
scm_makprom (SCM code
);
220 extern SCM
scm_force (SCM x
);
221 extern SCM
scm_promise_p (SCM x
);
222 extern SCM
scm_cons_source (SCM xorig
, SCM x
, SCM y
);
223 extern SCM
scm_copy_tree (SCM obj
);
224 extern SCM
scm_eval_3 (SCM obj
, int copyp
, SCM env
);
225 extern SCM
scm_eval2 (SCM obj
, SCM env_thunk
);
226 extern SCM
scm_eval (SCM obj
);
227 extern SCM
scm_eval_x (SCM obj
);
228 extern void scm_init_eval (void);