src/reader.h

   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
  31 typedef struct merger_list
  32 {
  33   struct merger_list* next;
  34   uniqstr name;
  35   uniqstr type;
  36 } merger_list;
  37
  38 /* From the scanner.  */
  39 extern FILE *gram_in;
  40 extern int gram__flex_debug;
  41 extern boundary scanner_cursor;
  42 extern char *last_string;
  43 extern location last_braced_code_loc;
  44 extern int max_left_semantic_context;
  45 void scanner_initialize (void);
  46 void scanner_free (void);
  47 void 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".  */
  51 extern FILE *gram_out;
  52 extern int gram_lineno;
  53
  54 # define YY_DECL int gram_lex (YYSTYPE *val, location *loc)
  55 YY_DECL;
  56
  57
  58 /* From the parser.  */
  59 extern int gram_debug;
  60 int gram_parse (void);
  61 char const *token_name (int);
  62
  63
  64 /* From reader.c. */
  65 void grammar_start_symbol_set (symbol *sym, location loc);
  66 void prologue_augment (const char *prologue, location loc);
  67 void grammar_current_rule_begin (symbol *lhs, location loc);
  68 void grammar_current_rule_end (location loc);
  69 void grammar_midrule_action (void);
  70 void grammar_current_rule_prec_set (symbol *precsym, location loc);
  71 void grammar_current_rule_dprec_set (int dprec, location loc);
  72 void grammar_current_rule_merge_set (uniqstr name, location loc);
  73 void grammar_current_rule_symbol_append (symbol *sym, location loc);
  74 void grammar_current_rule_action_append (const char *action, location loc);
  75 extern symbol_list *current_rule;
  76 void reader (void);
  77 void free_merger_functions (void);
  78
  79 extern merger_list *merge_functions;
  80
  81 /* Was %union seen?  */
  82 extern bool typed;
  83
  84 /* Should rules have a default precedence?  */
  85 extern bool default_prec;
  86
  87 #endif /* !READER_H_ */