[bison.git] / src / nullable.h

/* Part of the bison parser generator,

   Copyright (C) 2000, 2002, 2009-2012 Free Software Foundation, Inc.

   This file is part of Bison, the GNU Compiler Compiler.

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

#ifndef NULLABLE_H_
# define NULLABLE_H_

/* A vector saying which nonterminals can expand into the null string.
   NULLABLE[I - NTOKENS] is nonzero if symbol I can do so.  */
extern bool *nullable;

/* Set up NULLABLE. */
extern void nullable_compute (void);

/* Free NULLABLE. */
extern void nullable_free (void);
#endif /* !NULLABLE_H_ */
Commit	Line	Data
3519ec76	1	/* Part of the bison parser generator,
7d424de1	2
34136e65	3	Copyright (C) 2000, 2002, 2009-2012 Free Software Foundation, Inc.
3519ec76 AD	4
	5	This file is part of Bison, the GNU Compiler Compiler.
	6
f16b0819	7	This program is free software: you can redistribute it and/or modify
3519ec76	8	it under the terms of the GNU General Public License as published by
f16b0819 PE	9	the Free Software Foundation, either version 3 of the License, or
f16b0819 PE	10	(at your option) any later version.
3519ec76	11
f16b0819	12	This program is distributed in the hope that it will be useful,
3519ec76 AD	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
f16b0819	18	along with this program. If not, see <http://www.gnu.org/licenses/>. */
3519ec76 AD	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. */
bb0027a9	25	extern bool *nullable;
3519ec76 AD	26
3519ec76 AD	27	/* Set up NULLABLE. */
d33cb3ae	28	extern void nullable_compute (void);
3519ec76 AD	29
3519ec76 AD	30	/* Free NULLABLE. */
d33cb3ae	31	extern void nullable_free (void);
3519ec76	32	#endif /* !NULLABLE_H_ */