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      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 type);
     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_ */
     88