1 /* Input parser for Bison
3 Copyright (C) 2000-2003, 2005-2007, 2009-2015, 2018-2020 Free
4 Software Foundation, Inc.
6 This file is part of Bison, the GNU Compiler Compiler.
8 This program is free software: you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation, either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 # include "location.h"
26 # include "named-ref.h"
28 # include "parse-gram.h"
30 typedef struct merger_list
32 struct merger_list
* next
;
35 location type_declaration_loc
;
38 void free_merger_functions (void);
39 extern merger_list
*merge_functions
;
41 /* List of the start symbols. */
42 extern symbol_list
*start_symbols
;
44 /* Fetch (or create) a token "YY_PARSE_foo" for start symbol "foo".
46 We don't use the simple "YY_FOO" because (i) we might get clashes
47 with some of our symbols (e.g., cast => YY_CAST), and (ii) upcasing
48 introduces possible clashes between terminal FOO and nonterminal
50 symbol
*switching_token (const symbol
*start
);
52 void grammar_start_symbols_add (symbol_list
*syms
);
54 void grammar_current_rule_begin (symbol
*lhs
, location loc
,
55 named_ref
*lhs_named_ref
);
56 void grammar_current_rule_end (location loc
);
57 void grammar_midrule_action (void);
58 /* Apply %empty to the current rule. */
59 void grammar_current_rule_empty_set (location loc
);
60 void grammar_current_rule_prec_set (symbol
*precsym
, location loc
);
61 void grammar_current_rule_dprec_set (int dprec
, location loc
);
62 void grammar_current_rule_merge_set (uniqstr name
, location loc
);
63 void grammar_current_rule_expect_sr (int count
, location loc
);
64 void grammar_current_rule_expect_rr (int count
, location loc
);
65 void grammar_current_rule_symbol_append (symbol
*sym
, location loc
,
67 /* Attach an ACTION to the current rule. */
68 void grammar_current_rule_action_append (const char *action
, location loc
,
69 named_ref
*nref
, uniqstr tag
);
70 /* Attach a PREDICATE to the current rule. */
71 void grammar_current_rule_predicate_append (const char *predicate
, location loc
);
73 /* Read in the grammar specification. */
74 void reader (const char *gram
);
76 /* Was %union seen? */
77 extern bool union_seen
;
79 /* Should rules have a default precedence? */
80 extern bool default_prec
;
82 #endif /* !READER_H_ */