src/nullable.h

   1 /* Part of the bison parser generator,
   2
   3    Copyright (C) 2000, 2002, 2009-2012 Free Software Foundation, Inc.
   4
   5    This file is part of Bison, the GNU Compiler Compiler.
   6
   7    This program is free software: you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation, either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #ifndef NULLABLE_H_
  21 # define NULLABLE_H_
  22
  23 /* A vector saying which nonterminals can expand into the null string.
  24    NULLABLE[I - NTOKENS] is nonzero if symbol I can do so.  */
  25 extern bool *nullable;
  26
  27 /* Set up NULLABLE. */
  28 extern void nullable_compute (void);
  29
  30 /* Free NULLABLE. */
  31 extern void nullable_free (void);
  32 #endif /* !NULLABLE_H_ */