libguile/eval.h

   1 /* classes: h_files */
   2
   3 #ifndef SCM_EVAL_H
   4 #define SCM_EVAL_H
   5
   6 /* Copyright (C) 1995,1996,1998,1999,2000,2001,2002, 2003 Free Software Foundation, Inc.
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  21  */
  22
  23 \f
  24
  25 #include "libguile/__scm.h"
  26
  27 #include "libguile/struct.h"
  28
  29 \f
  30
  31 /* {Options}
  32  */
  33
  34 SCM_API scm_t_option scm_eval_opts[];
  35
  36 #define SCM_EVAL_STACK         scm_eval_opts[0].val
  37 #define SCM_N_EVAL_OPTIONS 1
  38
  39 SCM_API long scm_eval_stack;
  40
  41 SCM_API scm_t_option scm_evaluator_trap_table[];
  42
  43 SCM_API SCM scm_eval_options_interface (SCM setting);
  44
  45 #define SCM_TRAPS_P            scm_evaluator_trap_table[0].val
  46 #define SCM_ENTER_FRAME_P      scm_evaluator_trap_table[1].val
  47 #define SCM_APPLY_FRAME_P      scm_evaluator_trap_table[2].val
  48 #define SCM_EXIT_FRAME_P       scm_evaluator_trap_table[3].val
  49 #define SCM_ENTER_FRAME_HDLR   (SCM)(scm_evaluator_trap_table[4].val)
  50 #define SCM_APPLY_FRAME_HDLR   (SCM)(scm_evaluator_trap_table[5].val)
  51 #define SCM_EXIT_FRAME_HDLR    (SCM)(scm_evaluator_trap_table[6].val)
  52 #define SCM_N_EVALUATOR_TRAPS 7
  53
  54 \f
  55
  56 /* {Ilocs}
  57  *
  58  * Ilocs are relative pointers into local environment structures.
  59  *
  60  */
  61 #define SCM_ILOCP(n)            (SCM_ITAG8(n)==scm_tc8_iloc)
  62 #define SCM_ILOC00              SCM_MAKE_ITAG8(0L, scm_tc8_iloc)
  63 #define SCM_IDINC               (0x00100000L)
  64 #define SCM_ICDR                (0x00080000L)
  65 #define SCM_IFRINC              (0x00000100L)
  66 #define SCM_IDSTMSK             (-SCM_IDINC)
  67 #define SCM_IFRAME(n)           ((long)((SCM_ICDR-SCM_IFRINC)>>8) \
  68                                  & (SCM_UNPACK (n) >> 8))
  69 #define SCM_IDIST(n)            (SCM_UNPACK (n) >> 20)
  70 #define SCM_ICDRP(n)            (SCM_ICDR & SCM_UNPACK (n))
  71 #define SCM_MAKE_ILOC(frame_nr, binding_nr, last_p) \
  72   SCM_PACK ( \
  73     ((frame_nr) << 8) \
  74     + ((binding_nr) << 20) \
  75     + ((last_p) ? SCM_ICDR : 0) \
  76     + scm_tc8_iloc )
  77
  78 \f
  79
  80 /* {Promises}
  81  */
  82
  83 #define SCM_F_PROMISE_COMPUTED (1L << 16)
  84 #define SCM_PROMISE_COMPUTED_P(promise) \
  85   (SCM_F_PROMISE_COMPUTED & SCM_CELL_WORD_0 (promise))
  86 #define SCM_SET_PROMISE_COMPUTED(promise) \
  87   SCM_SET_CELL_WORD_0 (promise, scm_tc16_promise | SCM_F_PROMISE_COMPUTED)
  88 #define SCM_PROMISE_MUTEX(promise) \
  89   ((scm_t_rec_mutex *) SCM_CELL_WORD_2 (promise))
  90 #define SCM_PROMISE_DATA SCM_CELL_OBJECT_1
  91 #define SCM_SET_PROMISE_DATA SCM_SET_CELL_OBJECT_1
  92 SCM_API scm_t_bits scm_tc16_promise;
  93
  94 \f
  95
  96 /* {Evaluator}
  97  *
  98  * For an explanation of symbols containing "EVAL", see beginning of eval.c.
  99  */
 100 #define SCM_EVALIM2(x) \
 101   ((SCM_EQ_P ((x), SCM_EOL) \
 102     ? scm_misc_error (NULL, scm_s_expression, SCM_EOL), 0 \
 103     : 0), \
 104    (x))
 105 #define SCM_EVALIM(x, env) (SCM_ILOCP (x) \
 106                             ? *scm_ilookup ((x), env) \
 107                             : SCM_EVALIM2(x))
 108 #define SCM_XEVAL(x, env) (SCM_IMP (x) \
 109                            ? SCM_EVALIM2(x) \
 110                            : (*scm_ceval_ptr) ((x), (env)))
 111 #define SCM_XEVALCAR(x, env) (SCM_IMP (SCM_CAR (x)) \
 112                               ? SCM_EVALIM (SCM_CAR (x), env) \
 113                               : (SCM_SYMBOLP (SCM_CAR (x)) \
 114                                  ? *scm_lookupcar (x, env, 1) \
 115                                  : (*scm_ceval_ptr) (SCM_CAR (x), env)))
 116
 117 typedef SCM (*scm_t_trampoline_0) (SCM proc);
 118 typedef SCM (*scm_t_trampoline_1) (SCM proc, SCM arg1);
 119 typedef SCM (*scm_t_trampoline_2) (SCM proc, SCM arg1, SCM arg2);
 120
 121 \f
 122
 123 #define SCM_EXTEND_ENV scm_acons
 124
 125 /*fixme* This should probably be removed throught the code. */
 126
 127 #define SCM_TOP_LEVEL_LOOKUP_CLOSURE (scm_current_module_lookup_closure())
 128
 129 \f
 130 SCM_API const char scm_s_expression[];
 131 SCM_API const char scm_s_test[];
 132 SCM_API const char scm_s_body[];
 133 SCM_API const char scm_s_bindings[];
 134 SCM_API const char scm_s_variable[];
 135 SCM_API const char scm_s_clauses[];
 136 SCM_API const char scm_s_formals[];
 137 SCM_API const char scm_s_set_x[];
 138
 139 SCM_API SCM scm_sym_and;
 140 SCM_API SCM scm_sym_begin;
 141 SCM_API SCM scm_sym_case;
 142 SCM_API SCM scm_sym_cond;
 143 SCM_API SCM scm_sym_define;
 144 SCM_API SCM scm_sym_do;
 145 SCM_API SCM scm_sym_if;
 146 SCM_API SCM scm_sym_lambda;
 147 SCM_API SCM scm_sym_let;
 148 SCM_API SCM scm_sym_letstar;
 149 SCM_API SCM scm_sym_letrec;
 150 SCM_API SCM scm_sym_quote;
 151 SCM_API SCM scm_sym_quasiquote;
 152 SCM_API SCM scm_sym_unquote;
 153 SCM_API SCM scm_sym_uq_splicing;
 154
 155 SCM_API SCM scm_sym_dot;
 156 SCM_API SCM scm_sym_atapply;
 157 SCM_API SCM scm_sym_atcall_cc;
 158 SCM_API SCM scm_sym_at_call_with_values;
 159 SCM_API SCM scm_sym_delay;
 160 SCM_API SCM scm_sym_arrow;
 161 SCM_API SCM scm_sym_else;
 162 SCM_API SCM scm_sym_apply;
 163 SCM_API SCM scm_sym_set_x;
 164 SCM_API SCM scm_sym_args;
 165
 166 \f
 167
 168 SCM_API SCM * scm_ilookup (SCM iloc, SCM env);
 169 SCM_API SCM * scm_lookupcar (SCM vloc, SCM genv, int check);
 170 SCM_API SCM scm_unmemocar (SCM form, SCM env);
 171 SCM_API SCM scm_unmemocopy (SCM form, SCM env);
 172 SCM_API SCM scm_eval_car (SCM pair, SCM env);
 173 SCM_API SCM scm_eval_body (SCM code, SCM env);
 174 SCM_API SCM scm_eval_args (SCM i, SCM env, SCM proc);
 175 SCM_API SCM scm_m_quote (SCM xorig, SCM env);
 176 SCM_API SCM scm_m_begin (SCM xorig, SCM env);
 177 SCM_API SCM scm_m_if (SCM xorig, SCM env);
 178 SCM_API SCM scm_m_set_x (SCM xorig, SCM env);
 179 SCM_API SCM scm_m_vref (SCM xorig, SCM env);
 180 SCM_API SCM scm_m_vset (SCM xorig, SCM env);
 181 SCM_API SCM scm_m_and (SCM xorig, SCM env);
 182 SCM_API SCM scm_m_or (SCM xorig, SCM env);
 183 SCM_API SCM scm_m_case (SCM xorig, SCM env);
 184 SCM_API SCM scm_m_cond (SCM xorig, SCM env);
 185 SCM_API SCM scm_m_lambda (SCM xorig, SCM env);
 186 SCM_API SCM scm_m_letstar (SCM xorig, SCM env);
 187 SCM_API SCM scm_m_do (SCM xorig, SCM env);
 188 SCM_API SCM scm_m_quasiquote (SCM xorig, SCM env);
 189 SCM_API SCM scm_m_delay (SCM xorig, SCM env);
 190 SCM_API SCM scm_m_future (SCM xorig, SCM env);
 191 SCM_API SCM scm_m_define (SCM x, SCM env);
 192 SCM_API SCM scm_m_letrec (SCM xorig, SCM env);
 193 SCM_API SCM scm_m_let (SCM xorig, SCM env);
 194 SCM_API SCM scm_m_apply (SCM xorig, SCM env);
 195 SCM_API SCM scm_m_cont (SCM xorig, SCM env);
 196 #if SCM_ENABLE_ELISP
 197 SCM_API SCM scm_m_nil_cond (SCM xorig, SCM env);
 198 SCM_API SCM scm_m_atfop (SCM xorig, SCM env);
 199 #endif /* SCM_ENABLE_ELISP */
 200 SCM_API SCM scm_m_atbind (SCM xorig, SCM env);
 201 SCM_API SCM scm_m_at_call_with_values (SCM xorig, SCM env);
 202 SCM_API int scm_badargsp (SCM formals, SCM args);
 203 SCM_API SCM scm_ceval (SCM x, SCM env);
 204 SCM_API SCM scm_deval (SCM x, SCM env);
 205 SCM_API SCM scm_call_0 (SCM proc);
 206 SCM_API SCM scm_call_1 (SCM proc, SCM arg1);
 207 SCM_API SCM scm_call_2 (SCM proc, SCM arg1, SCM arg2);
 208 SCM_API SCM scm_call_3 (SCM proc, SCM arg1, SCM arg2, SCM arg3);
 209 SCM_API SCM scm_call_4 (SCM proc, SCM arg1, SCM arg2, SCM arg3, SCM arg4);
 210 SCM_API SCM scm_apply_0 (SCM proc, SCM args);
 211 SCM_API SCM scm_apply_1 (SCM proc, SCM arg1, SCM args);
 212 SCM_API SCM scm_apply_2 (SCM proc, SCM arg1, SCM arg2, SCM args);
 213 SCM_API SCM scm_apply_3 (SCM proc, SCM arg1, SCM arg2, SCM arg3, SCM args);
 214 SCM_API SCM scm_i_call_closure_0 (SCM proc);
 215 SCM_API scm_t_trampoline_0 scm_trampoline_0 (SCM proc);
 216 SCM_API scm_t_trampoline_1 scm_trampoline_1 (SCM proc);
 217 SCM_API scm_t_trampoline_2 scm_trampoline_2 (SCM proc);
 218 SCM_API SCM scm_nconc2last (SCM lst);
 219 SCM_API SCM scm_apply (SCM proc, SCM arg1, SCM args);
 220 SCM_API SCM scm_dapply (SCM proc, SCM arg1, SCM args);
 221 SCM_API SCM scm_m_expand_body (SCM xorig, SCM env);
 222 SCM_API SCM scm_macroexp (SCM x, SCM env);
 223 SCM_API SCM scm_map (SCM proc, SCM arg1, SCM args);
 224 SCM_API SCM scm_for_each (SCM proc, SCM arg1, SCM args);
 225 SCM_API SCM scm_closure (SCM code, SCM env);
 226 SCM_API SCM scm_makprom (SCM code);
 227 SCM_API SCM scm_force (SCM x);
 228 SCM_API SCM scm_promise_p (SCM x);
 229 SCM_API SCM scm_cons_source (SCM xorig, SCM x, SCM y);
 230 SCM_API SCM scm_copy_tree (SCM obj);
 231 SCM_API SCM scm_i_eval_x (SCM exp, SCM env);
 232 SCM_API SCM scm_i_eval (SCM exp, SCM env);
 233 SCM_API SCM scm_primitive_eval (SCM exp);
 234 SCM_API SCM scm_primitive_eval_x (SCM exp);
 235 SCM_API SCM scm_eval (SCM exp, SCM module);
 236 SCM_API SCM scm_eval_x (SCM exp, SCM module);
 237
 238 SCM_API void scm_init_eval (void);
 239
 240 #endif  /* SCM_EVAL_H */
 241
 242 /*
 243   Local Variables:
 244   c-file-style: "gnu"
 245   End:
 246 */