libguile/objects.c

   1 /*      Copyright (C) 1995,1996 Free Software Foundation, Inc.
   2  *
   3  * This program is free software; you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation; either version 2, or (at your option)
   6  * any later version.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this software; see the file COPYING.  If not, write to
  15  * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  16  * Boston, MA 02111-1307 USA
  17  *
  18  * As a special exception, the Free Software Foundation gives permission
  19  * for additional uses of the text contained in its release of GUILE.
  20  *
  21  * The exception is that, if you link the GUILE library with other files
  22  * to produce an executable, this does not by itself cause the
  23  * resulting executable to be covered by the GNU General Public License.
  24  * Your use of that executable is in no way restricted on account of
  25  * linking the GUILE library code into it.
  26  *
  27  * This exception does not however invalidate any other reasons why
  28  * the executable file might be covered by the GNU General Public License.
  29  *
  30  * This exception applies only to the code released by the
  31  * Free Software Foundation under the name GUILE.  If you copy
  32  * code from other Free Software Foundation releases into a copy of
  33  * GUILE, as the General Public License permits, the exception does
  34  * not apply to the code that you add in this way.  To avoid misleading
  35  * anyone as to the status of such modified files, you must delete
  36  * this exception notice from them.
  37  *
  38  * If you write modifications of your own for GUILE, it is your choice
  39  * whether to permit this exception to apply to your modifications.
  40  * If you do not wish that, delete this exception notice.  */
  41 \f
  42
  43 /* This file and objects.h contains those minimal pieces of the Guile
  44  * Object Oriented Programming System which need to be included in
  45  * libguile.  See the comments in objects.h.
  46  */
  47
  48 #include "_scm.h"
  49
  50 #include "struct.h"
  51
  52 #include "objects.h"
  53 \f
  54
  55 SCM scm_metaclass_standard;
  56 SCM scm_metaclass_operator;
  57
  58 void
  59 scm_init_objects ()
  60 {
  61   SCM ms = scm_makfrom0str (SCM_METACLASS_STANDARD_LAYOUT);
  62   SCM ml = scm_make_struct_layout (ms);
  63   SCM mt = scm_make_vtable_vtable (ml, SCM_INUM0,
  64                                    SCM_LIST3 (SCM_BOOL_F, SCM_EOL, SCM_EOL));
  65
  66   SCM os = scm_makfrom0str (SCM_METACLASS_OPERATOR_LAYOUT);
  67   SCM ol = scm_make_struct_layout (os);
  68   SCM ot = scm_make_vtable_vtable (ol, SCM_INUM0,
  69                                    SCM_LIST3 (SCM_BOOL_F, SCM_EOL, SCM_EOL));
  70
  71   SCM es = scm_makfrom0str (SCM_ENTITY_LAYOUT);
  72   SCM el = scm_make_struct_layout (es);
  73   SCM et = scm_make_struct (mt, SCM_INUM0,
  74                             SCM_LIST4 (el, SCM_BOOL_F, SCM_EOL, SCM_EOL));
  75
  76   scm_sysintern ("<standard-metaclass>", mt);
  77   scm_metaclass_standard = mt;
  78   scm_sysintern ("<operator-metaclass>", ot);
  79   scm_metaclass_operator = ot;
  80   SCM_SET_CLASS_FLAGS (et, SCM_CLASSF_OPERATOR | SCM_CLASSF_ENTITY);
  81   scm_sysintern ("<entity-class>", et);
  82 }