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_ */ 34
