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Avoid empty-if warnings.
[bison.git] / 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_ */