Algol 68 Genie

a68g-nil.h

     
   1  //! @file a68g-nil.h
   2  //! @author J. Marcel van der Veer
   3  
   4  //! @section Copyright
   5  //!
   6  //! This file is part of Algol68G - an Algol 68 compiler-interpreter.
   7  //! Copyright 2001-2024 J. Marcel van der Veer [algol68g@xs4all.nl].
   8  
   9  //! @section License
  10  //!
  11  //! This program is free software; you can redistribute it and/or modify it 
  12  //! under the terms of the GNU General Public License as published by the 
  13  //! Free Software Foundation; either version 3 of the License, or 
  14  //! (at your option) any later version.
  15  //!
  16  //! This program is distributed in the hope that it will be useful, but 
  17  //! WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 
  18  //! or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 
  19  //! more details. You should have received a copy of the GNU General Public 
  20  //! License along with this program. If not, see [http://www.gnu.org/licenses/].
  21  
  22  //! @section Synopsis
  23  //!
  24  //! Various forms of NIL.
  25  
  26  #if !defined (__A68G_NIL_H__)
  27  #define __A68G_NIL_H__
  28  
  29  #define NO_A68_REF ((A68_REF *) NULL)
  30  #define NO_ARRAY ((A68_ARRAY *) NULL)
  31  #define NO_BOOK ((BOOK_T *) NULL)
  32  #define NO_BOOL ((BOOL_T *) NULL)
  33  #define NO_BYTE ((BYTE_T *) NULL)
  34  #define NO_CONSTANT ((void *) NULL)
  35  #define NO_DEC ((DEC_T *) NULL)
  36  #define NO_DIAGNOSTIC ((DIAGNOSTIC_T *) NULL)
  37  #define NO_EDLIN ((EDLIN_T *) NULL)
  38  #define NO_FILE ((FILE *) NULL)
  39  #define NO_FORMAT ((A68_FORMAT *) NULL)
  40  #define NO_GINFO ((GINFO_T *) NULL)
  41  #define NO_GPROC ((void (*) (NODE_T *)) NULL)
  42  #define NO_HANDLE ((A68_HANDLE *) NULL)
  43  #define NO_INT ((int *) NULL)
  44  #define NO_JMP_BUF ((jmp_buf *) NULL)
  45  #define NO_KEYWORD ((KEYWORD_T *) NULL)
  46  #define NO_NINFO ((NODE_INFO_T *) NULL)
  47  #define NO_NOTE ((void (*) (NODE_T *)) NULL)
  48  #define NO_OPTION_LIST ((OPTION_LIST_T *) NULL)
  49  #define NO_PACK ((PACK_T *) NULL)
  50  #define NO_POSTULATE ((POSTULATE_T *) NULL)
  51  #define NO_PPROC ((PROP_T (*) (NODE_T *)) NULL)
  52  #define NO_PROCEDURE ((A68_PROCEDURE *) NULL)
  53  #define NO_REAL ((REAL_T *) NULL)
  54  #define NO_REFINEMENT ((REFINEMENT_T *) NULL)
  55  #define NO_REGMATCH ((regmatch_t *) NULL)
  56  #define NO_SCOPE ((SCOPE_T *) NULL)
  57  #define NO_SOID ((SOID_T *) NULL)
  58  #define NO_SOUND ((A68_SOUND *) NULL)
  59  #define NO_STREAM NO_FILE
  60  #define NO_TEXT ((char *) NULL)
  61  #define NO_TICK ((BOOL_T *) NULL)
  62  #define NO_TOKEN ((TOKEN_T *) NULL)
  63  #define NO_TUPLE ((A68_TUPLE *) NULL)
  64  #define NO_VAR (NULL)
  65  
  66  static const A68_FORMAT nil_format = {
  67    INIT_MASK, NULL, 0
  68  };
  69  
  70  static const A68_HANDLE nil_handle = {
  71    INIT_MASK,
  72    NO_BYTE,
  73    0,
  74    NO_MOID,
  75    NO_HANDLE,
  76    NO_HANDLE
  77  };
  78  
  79  static const A68_REF nil_ref = {
  80    (STATUS_MASK_T) (INIT_MASK | NIL_MASK),
  81    0,
  82    0,
  83    NO_HANDLE
  84  };
  85  
  86  #endif
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