libguile/lang.h

   1 /* classes: h_files */
   2
   3 #ifndef SCM_LANG_H
   4 #define SCM_LANG_H
   5
   6 /* Copyright (C) 1998 Free Software Foundation, Inc.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2, or (at your option)
  11  * any later version.
  12  *
  13  * This program 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
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this software; see the file COPYING.  If not, write to
  20  * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  21  * Boston, MA 02111-1307 USA
  22  *
  23  * As a special exception, the Free Software Foundation gives permission
  24  * for additional uses of the text contained in its release of GUILE.
  25  *
  26  * The exception is that, if you link the GUILE library with other files
  27  * to produce an executable, this does not by itself cause the
  28  * resulting executable to be covered by the GNU General Public License.
  29  * Your use of that executable is in no way restricted on account of
  30  * linking the GUILE library code into it.
  31  *
  32  * This exception does not however invalidate any other reasons why
  33  * the executable file might be covered by the GNU General Public License.
  34  *
  35  * This exception applies only to the code released by the
  36  * Free Software Foundation under the name GUILE.  If you copy
  37  * code from other Free Software Foundation releases into a copy of
  38  * GUILE, as the General Public License permits, the exception does
  39  * not apply to the code that you add in this way.  To avoid misleading
  40  * anyone as to the status of such modified files, you must delete
  41  * this exception notice from them.
  42  *
  43  * If you write modifications of your own for GUILE, it is your choice
  44  * whether to permit this exception to apply to your modifications.
  45  * If you do not wish that, delete this exception notice.  */
  46
  47 \f
  48
  49 #include "libguile/__scm.h"
  50
  51 \f
  52
  53 extern SCM scm_lisp_nil;
  54 extern SCM scm_lisp_t;
  55
  56 #define SCM_NILP(x) (SCM_EQ_P ((x), scm_lisp_nil))
  57 #define SCM_NILNULLP(x) (SCM_NILP (x) || SCM_NULLP (x))
  58 #define SCM_NIL2EOL(x, tmp) (SCM_EQ_P ((tmp = (x)), scm_lisp_nil) ? SCM_EOL : tmp)
  59 #define SCM_EOL2NIL(x, tmp) (SCM_NULLP (tmp = (x)) ? scm_lisp_nil : tmp)
  60 #define SCM_EOL_IFY(x, tmp) (tmp = (x), SCM_NILP (tmp) ? SCM_EOL : tmp)
  61 #define SCM_NIL_IFY(x, tmp) (tmp = (x), SCM_NILP (tmp) ? scm_lisp_nil : tmp)
  62
  63 \f
  64
  65 extern SCM scm_nil_cons (SCM x, SCM y);
  66 extern SCM scm_nil_car (SCM x);
  67 extern SCM scm_nil_cdr (SCM x);
  68 extern SCM scm_null (SCM x);
  69 extern SCM scm_m_while (SCM exp, SCM env);
  70 extern SCM scm_nil_eq (SCM x, SCM y);
  71 extern void scm_init_lang (void);
  72
  73 #endif  /* SCM_LANG_H */
  74
  75 /*
  76   Local Variables:
  77   c-file-style: "gnu"
  78   End:
  79 */