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    This program 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 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.  */
  18
  19 #ifndef NULLABLE_H_
  20 # define NULLABLE_H_
  21
  22 /* A vector saying which nonterminals can expand into the null string.
  23    NULLABLE[I - NTOKENS] is nonzero if symbol I can do so.  */
  24 extern bool *nullable;
  25
  26 /* Set up NULLABLE. */
  27 extern void nullable_compute (void);
  28
  29 /* Free NULLABLE. */
  30 extern void nullable_free (void);
  31 #endif /* !NULLABLE_H_ */