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/* Grammar reduction for Bison.
Copyright (C) 2000-2002, 2007, 2009-2015, 2018-2019 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 REDUCE_H_
# define REDUCE_H_
void reduce_grammar (void);
void reduce_output (FILE *out);
bool reduce_token_unused_in_grammar (symbol_number i);
/** Whether symbol \a i is useless in the grammar.
* \pre reduce_grammar was called before.
*/
bool reduce_nonterminal_useless_in_grammar (const sym_content *sym);
void reduce_free (void);
/** Map initial nterm numbers to the new ones. Built by
* reduce_grammar. Size nvars + nuseless_nonterminals. */
extern symbol_number *nterm_map;
extern unsigned nuseless_nonterminals;
extern unsigned nuseless_productions;
#endif /* !REDUCE_H_ */
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