/* Match rules with nonterminals for bison,
   Copyright 1984, 1989, 2000 Free Software Foundation, Inc.

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

   Bison 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 2, or (at your option)
   any later version.

   Bison 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 Bison; see the file COPYING.  If not, write to
   the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#ifndef DERIVES_H_
# define DERIVES_H_

extern short **derives;

/* set_derives finds, for each variable (nonterminal), which rules can
   derive it.  It sets up the value of derives so that derives[i -
   ntokens] points to a vector of rule numbers, terminated with -1.
   */

void set_derives PARAMS((void));
void free_derives PARAMS((void));

#endif /* !DERIVES_H_ */