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.  */
25extern bool *nullable;
26
27/* Set up NULLABLE. */
28extern void nullable_compute (void);
29
30/* Free NULLABLE. */
31extern void nullable_free (void);
32#endif /* !NULLABLE_H_ */
33