libguile/eval.h

   1 /* classes: h_files */
   2
   3 #ifndef EVALH
   4 #define EVALH
   5 /*      Copyright (C) 1995,1996 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, 675 Mass Ave, Cambridge, MA 02139, USA.
  20  *
  21  * As a special exception, the Free Software Foundation gives permission
  22  * for additional uses of the text contained in its release of GUILE.
  23  *
  24  * The exception is that, if you link the GUILE library with other files
  25  * to produce an executable, this does not by itself cause the
  26  * resulting executable to be covered by the GNU General Public License.
  27  * Your use of that executable is in no way restricted on account of
  28  * linking the GUILE library code into it.
  29  *
  30  * This exception does not however invalidate any other reasons why
  31  * the executable file might be covered by the GNU General Public License.
  32  *
  33  * This exception applies only to the code released by the
  34  * Free Software Foundation under the name GUILE.  If you copy
  35  * code from other Free Software Foundation releases into a copy of
  36  * GUILE, as the General Public License permits, the exception does
  37  * not apply to the code that you add in this way.  To avoid misleading
  38  * anyone as to the status of such modified files, you must delete
  39  * this exception notice from them.
  40  *
  41  * If you write modifications of your own for GUILE, it is your choice
  42  * whether to permit this exception to apply to your modifications.
  43  * If you do not wish that, delete this exception notice.
  44  */
  45 \f
  46
  47 #include <libguile/__scm.h>
  48
  49 \f
  50
  51 /* {Ilocs}
  52  *
  53  * Ilocs are relative pointers into local environment structures.
  54  *
  55  */
  56 #define SCM_ILOCP(n)            (SCM_ITAG8(n)==scm_tc8_iloc)
  57 #define SCM_ILOC00              SCM_MAKE_ITAG8(0L, scm_tc8_iloc)
  58 #define SCM_IDINC               (0x00100000L)
  59 #define SCM_ICDR                (0x00080000L)
  60 #define SCM_IFRINC              (0x00000100L)
  61 #define SCM_IDSTMSK             (-SCM_IDINC)
  62 #define SCM_IFRAME(n)           ((int)((SCM_ICDR-SCM_IFRINC)>>8) & ((int)(n)>>8))
  63 #define SCM_IDIST(n)            (((unsigned long)(n))>>20)
  64 #define SCM_ICDRP(n)            (SCM_ICDR & (n))
  65
  66 \f
  67
  68
  69 /* {Evaluator}
  70  *
  71  * For an explanation of symbols containing "EVAL", see beginning of eval.c.
  72  */
  73 #ifdef DEBUG_EXTENSIONS
  74 #define XEVAL(x, env) (SCM_IMP(x) \
  75                       ? (x) \
  76                       : (*scm_ceval_ptr) ((x), (env)))
  77 #else
  78 #define XEVAL(x, env) (SCM_IMP(x)?(x):scm_ceval((x), (env)))
  79 #endif /* DEBUG_EXTENSIONS */
  80
  81 #define SCM_CEVAL scm_ceval
  82 #define SIDEVAL(x, env) if SCM_NIMP(x) SCM_CEVAL((x), (env))
  83
  84 \f
  85
  86 #define SCM_EXTEND_SCM_ENV scm_acons
  87
  88 \f
  89 extern SCM scm_i_dot;
  90 extern SCM scm_i_quote;
  91 extern SCM scm_i_quasiquote;
  92 extern SCM scm_i_lambda;
  93 extern SCM scm_i_let;
  94 extern SCM scm_i_arrow;
  95 extern SCM scm_i_else;
  96 extern SCM scm_i_unquote;
  97 extern SCM scm_i_uq_splicing;
  98 extern SCM scm_i_apply;
  99 extern SCM scm_top_level_lookup_thunk_var;
 100 extern SCM scm_i_name;
 101
 102
 103 /* A resolved global variable reference in the CAR position
 104  * of a list is stored (in code only) as a pointer to a pair with a
 105  * tag of 1.  This is called a "gloc".
 106  */
 107
 108 #define SCM_GLOC_SYM(x) (SCM_CAR((x)-1L))
 109 #define SCM_GLOC_VAL(x) (SCM_CDR((x)-1L))
 110
 111 \f
 112 #ifdef __STDC__
 113 extern SCM * scm_ilookup (SCM iloc, SCM env);
 114 extern SCM * scm_lookupcar (SCM vloc, SCM genv);
 115 extern SCM scm_unmemocar (SCM form, SCM env);
 116 extern SCM scm_unmemocopy (SCM form, SCM env);
 117 extern SCM scm_eval_car (SCM pair, SCM env);
 118 extern SCM scm_m_quote (SCM xorig, SCM env);
 119 extern SCM scm_m_begin (SCM xorig, SCM env);
 120 extern SCM scm_m_if (SCM xorig, SCM env);
 121 extern SCM scm_m_set (SCM xorig, SCM env);
 122 extern SCM scm_m_vref (SCM xorig, SCM env);
 123 extern SCM scm_m_vset (SCM xorig, SCM env);
 124 extern SCM scm_m_and (SCM xorig, SCM env);
 125 extern SCM scm_m_or (SCM xorig, SCM env);
 126 extern SCM scm_m_case (SCM xorig, SCM env);
 127 extern SCM scm_m_cond (SCM xorig, SCM env);
 128 extern SCM scm_m_lambda (SCM xorig, SCM env);
 129 extern SCM scm_m_letstar (SCM xorig, SCM env);
 130 extern SCM scm_m_do (SCM xorig, SCM env);
 131 extern SCM scm_m_quasiquote (SCM xorig, SCM env);
 132 extern SCM scm_m_delay (SCM xorig, SCM env);
 133 extern SCM scm_m_define (SCM x, SCM env);
 134 extern SCM scm_m_letrec (SCM xorig, SCM env);
 135 extern SCM scm_m_let (SCM xorig, SCM env);
 136 extern SCM scm_m_apply (SCM xorig, SCM env);
 137 extern SCM scm_m_cont (SCM xorig, SCM env);
 138 extern int scm_badargsp (SCM formals, SCM args);
 139 extern SCM scm_ceval (SCM x, SCM env);
 140 extern SCM scm_deval (SCM x, SCM env);
 141 extern SCM scm_procedure_documentation (SCM proc);
 142 extern SCM scm_nconc2last (SCM lst);
 143 extern SCM scm_apply (SCM proc, SCM arg1, SCM args);
 144 extern SCM scm_dapply (SCM proc, SCM arg1, SCM args);
 145 extern SCM SCM_APPLY (SCM proc, SCM arg1, SCM args);
 146 extern SCM scm_map (SCM proc, SCM arg1, SCM args);
 147 extern SCM scm_for_each (SCM proc, SCM arg1, SCM args);
 148 extern SCM scm_closure (SCM code, SCM env);
 149 extern SCM scm_makprom (SCM code);
 150 extern SCM scm_makacro (SCM code);
 151 extern SCM scm_makmacro (SCM code);
 152 extern SCM scm_makmmacro (SCM code);
 153 extern SCM scm_force (SCM x);
 154 extern SCM scm_promise_p (SCM x);
 155 extern SCM scm_copy_tree (SCM obj);
 156 extern SCM scm_eval_3 (SCM obj, int copyp, SCM env);
 157 extern SCM scm_top_level_env (SCM thunk);
 158 extern SCM scm_eval2 (SCM obj, SCM env_thunk);
 159 extern SCM scm_eval (SCM obj);
 160 extern SCM scm_eval_x (SCM obj);
 161 extern SCM scm_macro_eval_x (SCM exp, SCM env);
 162 extern SCM scm_definedp (SCM x, SCM env);
 163 extern SCM scm_make_synt (char *name, SCM (*macroizer) (), SCM (*fcn) ());
 164 extern void scm_init_eval (void);
 165
 166 #else /* STDC */
 167 extern SCM * scm_ilookup ();
 168 extern SCM * scm_lookupcar ();
 169 extern SCM scm_unmemocar ();
 170 extern SCM scm_unmemocopy ();
 171 extern SCM scm_eval_car ();
 172 extern SCM scm_m_quote ();
 173 extern SCM scm_m_begin ();
 174 extern SCM scm_m_if ();
 175 extern SCM scm_m_set ();
 176 extern SCM scm_m_vref ();
 177 extern SCM scm_m_vset ();
 178 extern SCM scm_m_and ();
 179 extern SCM scm_m_or ();
 180 extern SCM scm_m_case ();
 181 extern SCM scm_m_cond ();
 182 extern SCM scm_m_lambda ();
 183 extern SCM scm_m_letstar ();
 184 extern SCM scm_m_do ();
 185 extern SCM scm_m_quasiquote ();
 186 extern SCM scm_m_delay ();
 187 extern SCM scm_m_define ();
 188 extern SCM scm_m_letrec ();
 189 extern SCM scm_m_let ();
 190 extern SCM scm_m_apply ();
 191 extern SCM scm_m_cont ();
 192 extern int scm_badargsp ();
 193 extern SCM scm_ceval ();
 194 extern SCM scm_deval ();
 195 extern SCM scm_procedure_documentation ();
 196 extern SCM scm_nconc2last ();
 197 extern SCM scm_apply ();
 198 extern SCM scm_dapply ();
 199 extern SCM SCM_APPLY ();
 200 extern SCM scm_map ();
 201 extern SCM scm_for_each ();
 202 extern SCM scm_closure ();
 203 extern SCM scm_makprom ();
 204 extern SCM scm_makacro ();
 205 extern SCM scm_makmacro ();
 206 extern SCM scm_makmmacro ();
 207 extern SCM scm_force ();
 208 extern SCM scm_promise_p ();
 209 extern SCM scm_copy_tree ();
 210 extern SCM scm_eval_3 ();
 211 extern SCM scm_top_level_env ();
 212 extern SCM scm_eval2 ();
 213 extern SCM scm_eval ();
 214 extern SCM scm_eval_x ();
 215 extern SCM scm_macro_eval_x ();
 216 extern SCM scm_definedp ();
 217 extern SCM scm_make_synt ();
 218 extern void scm_init_eval ();
 219
 220 #endif /* STDC */
 221
 222 #endif  /* EVALH */