libguile/eval.h

   1 /* classes: h_files */
   2
   3 #ifndef EVALH
   4 #define EVALH
   5 /*      Copyright (C) 1995,1996,1998 Free Software Foundation, Inc.
   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
  19  * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  20  * Boston, MA 02111-1307 USA
  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.
  44  * If you do not wish that, delete this exception notice.  */
  45 \f
  46
  47 #include "libguile/__scm.h"
  48
  49 \f
  50
  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
  59 extern int scm_eval_stack;
  60
  61 extern scm_option scm_evaluator_trap_table[];
  62
  63 extern SCM scm_eval_options_interface SCM_P ((SCM setting));
  64
  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
  70
  71 \f
  72
  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
  91 /* {Evaluator}
  92  *
  93  * For an explanation of symbols containing "EVAL", see beginning of eval.c.
  94  */
  95 #ifdef DEBUG_EXTENSIONS
  96 #define XEVAL(x, env) (SCM_IMP(x) \
  97                       ? (x) \
  98                       : (*scm_ceval_ptr) ((x), (env)))
  99 #else
 100 #define XEVAL(x, env) (SCM_IMP(x)?(x):scm_ceval((x), (env)))
 101 #endif /* DEBUG_EXTENSIONS */
 102
 103 #define SCM_CEVAL scm_ceval
 104 #define SIDEVAL(x, env) if SCM_NIMP(x) SCM_CEVAL((x), (env))
 105
 106 \f
 107
 108 #define SCM_EXTEND_ENV scm_acons
 109
 110 \f
 111 extern SCM scm_i_dot;
 112 extern SCM scm_i_quote;
 113 extern SCM scm_i_quasiquote;
 114 extern SCM scm_i_lambda;
 115 extern SCM scm_i_let;
 116 extern SCM scm_i_arrow;
 117 extern SCM scm_i_else;
 118 extern SCM scm_i_unquote;
 119 extern SCM scm_i_uq_splicing;
 120 extern SCM scm_i_apply;
 121
 122 extern long scm_tc16_macro;
 123
 124 /* A resolved global variable reference in the CAR position
 125  * of a list is stored (in code only) as a pointer to a pair with a
 126  * tag of 1.  This is called a "gloc".
 127  */
 128
 129 #define SCM_GLOC_SYM(x) (SCM_CAR((x)-1L))
 130 #define SCM_GLOC_VAL(x) (SCM_CDR((x)-1L))
 131 #define SCM_GLOC_VAL_LOC(x) (SCM_CDRLOC((x)-1L))
 132
 133 \f
 134
 135 extern SCM * scm_ilookup SCM_P ((SCM iloc, SCM env));
 136 extern SCM * scm_lookupcar SCM_P ((SCM vloc, SCM genv));
 137 extern SCM scm_unmemocar SCM_P ((SCM form, SCM env));
 138 extern SCM scm_unmemocopy SCM_P ((SCM form, SCM env));
 139 extern SCM scm_eval_car SCM_P ((SCM pair, SCM env));
 140 extern SCM scm_eval_args SCM_P ((SCM i, SCM env, SCM proc));
 141 extern SCM scm_deval_args SCM_P ((SCM l, SCM env, SCM proc, SCM *lloc));
 142 extern SCM scm_m_quote SCM_P ((SCM xorig, SCM env));
 143 extern SCM scm_m_begin SCM_P ((SCM xorig, SCM env));
 144 extern SCM scm_m_if SCM_P ((SCM xorig, SCM env));
 145 extern SCM scm_m_set SCM_P ((SCM xorig, SCM env));
 146 extern SCM scm_m_vref SCM_P ((SCM xorig, SCM env));
 147 extern SCM scm_m_vset SCM_P ((SCM xorig, SCM env));
 148 extern SCM scm_m_and SCM_P ((SCM xorig, SCM env));
 149 extern SCM scm_m_or SCM_P ((SCM xorig, SCM env));
 150 extern SCM scm_m_case SCM_P ((SCM xorig, SCM env));
 151 extern SCM scm_m_cond SCM_P ((SCM xorig, SCM env));
 152 extern SCM scm_m_lambda SCM_P ((SCM xorig, SCM env));
 153 extern SCM scm_m_letstar SCM_P ((SCM xorig, SCM env));
 154 extern SCM scm_m_do SCM_P ((SCM xorig, SCM env));
 155 extern SCM scm_m_quasiquote SCM_P ((SCM xorig, SCM env));
 156 extern SCM scm_m_delay SCM_P ((SCM xorig, SCM env));
 157 extern SCM scm_m_define SCM_P ((SCM x, SCM env));
 158 extern SCM scm_m_letrec SCM_P ((SCM xorig, SCM env));
 159 extern SCM scm_m_let SCM_P ((SCM xorig, SCM env));
 160 extern SCM scm_m_apply SCM_P ((SCM xorig, SCM env));
 161 extern SCM scm_m_cont SCM_P ((SCM xorig, SCM env));
 162 extern SCM scm_m_undefine SCM_P ((SCM x, SCM env));
 163 extern int scm_badargsp SCM_P ((SCM formals, SCM args));
 164 extern SCM scm_ceval SCM_P ((SCM x, SCM env));
 165 extern SCM scm_deval SCM_P ((SCM x, SCM env));
 166 extern SCM scm_procedure_documentation SCM_P ((SCM proc));
 167 extern SCM scm_nconc2last SCM_P ((SCM lst));
 168 extern SCM scm_apply SCM_P ((SCM proc, SCM arg1, SCM args));
 169 extern SCM scm_dapply SCM_P ((SCM proc, SCM arg1, SCM args));
 170 extern SCM SCM_APPLY SCM_P ((SCM proc, SCM arg1, SCM args));
 171 extern SCM scm_map SCM_P ((SCM proc, SCM arg1, SCM args));
 172 extern SCM scm_for_each SCM_P ((SCM proc, SCM arg1, SCM args));
 173 extern SCM scm_closure SCM_P ((SCM code, SCM env));
 174 extern SCM scm_makprom SCM_P ((SCM code));
 175 extern SCM scm_makacro SCM_P ((SCM code));
 176 extern SCM scm_makmacro SCM_P ((SCM code));
 177 extern SCM scm_makmmacro SCM_P ((SCM code));
 178 extern SCM scm_macro_p SCM_P ((SCM obj));
 179 extern SCM scm_macro_type SCM_P ((SCM m));
 180 extern SCM scm_macro_name SCM_P ((SCM m));
 181 extern SCM scm_macro_transformer SCM_P ((SCM m));
 182 extern SCM scm_force SCM_P ((SCM x));
 183 extern SCM scm_promise_p SCM_P ((SCM x));
 184 extern SCM scm_copy_tree SCM_P ((SCM obj));
 185 extern SCM scm_eval_3 SCM_P ((SCM obj, int copyp, SCM env));
 186 extern SCM scm_top_level_env SCM_P ((SCM thunk));
 187 extern SCM scm_eval2 SCM_P ((SCM obj, SCM env_thunk));
 188 extern SCM scm_eval SCM_P ((SCM obj));
 189 extern SCM scm_eval_x SCM_P ((SCM obj));
 190 extern SCM scm_macro_eval_x SCM_P ((SCM exp, SCM env));
 191 extern SCM scm_definedp SCM_P ((SCM sym));
 192 extern SCM scm_make_synt SCM_P ((char *name,
 193                                  SCM (*macroizer) (SCM),
 194                                  SCM (*fcn) ()));
 195 extern void scm_init_eval SCM_P ((void));
 196
 197 #endif  /* EVALH */