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_ */ 33
