| 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_ */ |