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/* Input parser for Bison
Copyright (C) 2000-2003, 2005-2007, 2009-2015, 2018-2021 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 <https://www.gnu.org/licenses/>. */
#ifndef READER_H_
# define READER_H_
# include "location.h"
# include "symlist.h"
# include "named-ref.h"
# include "parse-gram.h"
typedef struct merger_list
{
struct merger_list* next;
uniqstr name;
/* One symbol whose type is the one used by all the symbols on which
this merging function is used. */
symbol *sym;
/* Where SYM was bound to this merging function. */
location type_declaration_loc;
} merger_list;
void free_merger_functions (void);
extern merger_list *merge_functions;
/* List of the start symbols. */
extern symbol_list *start_symbols;
/* Fetch (or create) a token "YY_PARSE_foo" for start symbol "foo".
We don't use the simple "YY_FOO" because (i) we might get clashes
with some of our symbols (e.g., cast => YY_CAST), and (ii) upcasing
introduces possible clashes between terminal FOO and nonterminal
foo. */
symbol *switching_token (const symbol *start);
void grammar_start_symbols_add (symbol_list *syms);
void grammar_current_rule_begin (symbol *lhs, location loc,
named_ref *lhs_named_ref);
void grammar_current_rule_end (location loc);
void grammar_midrule_action (void);
/* Apply %empty to the current rule. */
void grammar_current_rule_empty_set (location loc);
void grammar_current_rule_prec_set (symbol *precsym, location loc);
void grammar_current_rule_dprec_set (int dprec, location loc);
void grammar_current_rule_merge_set (uniqstr name, location loc);
void grammar_current_rule_expect_sr (int count, location loc);
void grammar_current_rule_expect_rr (int count, location loc);
void grammar_current_rule_symbol_append (symbol *sym, location loc,
named_ref *nref);
/* Attach an ACTION to the current rule. */
void grammar_current_rule_action_append (const char *action, location loc,
named_ref *nref, uniqstr tag);
/* Attach a PREDICATE to the current rule. */
void grammar_current_rule_predicate_append (const char *predicate, location loc);
/* Read in the grammar specification. */
void reader (const char *gram);
/* Was %union seen? */
extern bool union_seen;
/* Should rules have a default precedence? */
extern bool default_prec;
#endif /* !READER_H_ */
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