src/nullable.h

   1 /* Part of the bison parser generator,
   2    Copyright (C) 2000, 2002 Free Software Foundation, Inc.
   3
   4    This file is part of Bison, the GNU Compiler Compiler.
   5
   6    Bison is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2, or (at your option)
   9    any later version.
  10
  11    Bison is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with Bison; see the file COPYING.  If not, write to
  18    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  19    Boston, MA 02110-1301, USA.  */
  20
  21 #ifndef NULLABLE_H_
  22 # define NULLABLE_H_
  23
  24 /* A vector saying which nonterminals can expand into the null string.
  25    NULLABLE[I - NTOKENS] is nonzero if symbol I can do so.  */
  26 extern bool *nullable;
  27
  28 /* Set up NULLABLE. */
  29 extern void nullable_compute (void);
  30
  31 /* Free NULLABLE. */
  32 extern void nullable_free (void);
  33 #endif /* !NULLABLE_H_ */