| /* 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_ */ |