#ifndef SCM_MEMOIZE_H
#define SCM_MEMOIZE_H

/* Copyright 1995-1996,1998-2002,2004,2008-2011,2013-2014,2018
     Free Software Foundation, Inc.

   This file is part of Guile.

   Guile is free software: you can redistribute it and/or modify it
   under the terms of the GNU Lesser General Public License as published
   by the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.

   Guile 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 Lesser General Public
   License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with Guile.  If not, see
   <https://www.gnu.org/licenses/>.  */



#include "libguile/scm.h"




SCM_API SCM scm_sym_and;
SCM_API SCM scm_sym_begin;
SCM_API SCM scm_sym_case;
SCM_API SCM scm_sym_cond;
SCM_API SCM scm_sym_define;
SCM_API SCM scm_sym_do;
SCM_API SCM scm_sym_if;
SCM_API SCM scm_sym_lambda;
SCM_API SCM scm_sym_let;
SCM_API SCM scm_sym_letstar;
SCM_API SCM scm_sym_letrec;
SCM_API SCM scm_sym_quote;
SCM_API SCM scm_sym_quasiquote;
SCM_API SCM scm_sym_unquote;
SCM_API SCM scm_sym_uq_splicing;

SCM_API SCM scm_sym_at;
SCM_API SCM scm_sym_atat;
SCM_API SCM scm_sym_delay;
SCM_API SCM scm_sym_eval_when;
SCM_API SCM scm_sym_arrow;
SCM_API SCM scm_sym_else;
SCM_API SCM scm_sym_apply;
SCM_API SCM scm_sym_set_x;
SCM_API SCM scm_sym_args;

/* {Memoized Source}
 */

#define SCM_MEMOIZED_TAG(x) 	(scm_to_uint16 (scm_car (x)))
#define SCM_MEMOIZED_ARGS(x) 	(scm_cdr (x))

enum
  {
    SCM_M_SEQ,
    SCM_M_IF,
    SCM_M_LAMBDA,
    SCM_M_CAPTURE_ENV,
    SCM_M_LET,
    SCM_M_QUOTE,
    SCM_M_CAPTURE_MODULE,
    SCM_M_APPLY,
    SCM_M_CONT,
    SCM_M_CALL_WITH_VALUES,
    SCM_M_CALL,
    SCM_M_LEXICAL_REF,
    SCM_M_LEXICAL_SET,
    SCM_M_BOX_REF,
    SCM_M_BOX_SET,
    SCM_M_RESOLVE,
    SCM_M_CALL_WITH_PROMPT
  };




SCM_INTERNAL SCM scm_memoize_expression (SCM exp);
SCM_INTERNAL SCM scm_unmemoize_expression (SCM memoized);
SCM_INTERNAL SCM scm_memoized_typecode (SCM sym);
SCM_INTERNAL SCM scm_sys_resolve_variable (SCM loc, SCM module);

SCM_INTERNAL void scm_init_memoize (void);


#endif  /* SCM_MEMOIZE_H */