reader.h revision b7f2b4d529ee03ee0e4172cc06e7cd973bd9bef5 
1/* Input parser for Bison
2
3   Copyright (C) 2000, 2001, 2002, 2003, 2005, 2006 Free Software
4   Foundation, Inc.
5
6   This file is part of Bison, the GNU Compiler Compiler.
7
8   Bison 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 2, or (at your option)
11   any later version.
12
13   Bison 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.
17
18   You should have received a copy of the GNU General Public License
19   along with Bison; see the file COPYING.  If not, write to
20   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
21   Boston, MA 02110-1301, USA.  */
22
23#ifndef READER_H_
24# define READER_H_
25
26# include "location.h"
27# include "symlist.h"
28
29# include "parse-gram.h"
30
31typedef struct merger_list
32{
33  struct merger_list* next;
34  uniqstr name;
35  uniqstr type;
36} merger_list;
37
38/* From the scanner.  */
39extern FILE *gram_in;
40extern int gram__flex_debug;
41extern boundary scanner_cursor;
42extern char *last_string;
43extern location last_braced_code_loc;
44extern int max_left_semantic_context;
45void scanner_initialize (void);
46void scanner_free (void);
47void scanner_last_string_free (void);
48
49/* These are declared by the scanner, but not used.  We put them here
50   to pacify "make syntax-check".  */
51extern FILE *gram_out;
52extern int gram_lineno;
53
54# define YY_DECL int gram_lex (YYSTYPE *val, location *loc)
55YY_DECL;
56
57
58/* From the parser.  */
59extern int gram_debug;
60int gram_parse (void);
61char const *token_name (int type);
62
63
64/* From reader.c. */
65void grammar_start_symbol_set (symbol *sym, location loc);
66void prologue_augment (const char *prologue, location loc);
67void grammar_current_rule_begin (symbol *lhs, location loc);
68void grammar_current_rule_end (location loc);
69void grammar_midrule_action (void);
70void grammar_current_rule_prec_set (symbol *precsym, location loc);
71void grammar_current_rule_dprec_set (int dprec, location loc);
72void grammar_current_rule_merge_set (uniqstr name, location loc);
73void grammar_current_rule_symbol_append (symbol *sym, location loc);
74void grammar_current_rule_action_append (const char *action, location loc);
75extern symbol_list *current_rule;
76void reader (void);
77void free_merger_functions (void);
78
79extern merger_list *merge_functions;
80
81/* Was %union seen?  */
82extern bool typed;
83
84/* Should rules have a default precedence?  */
85extern bool default_prec;
86
87#endif /* !READER_H_ */
88