src/reader.h

   1 /* Input parser for bison
   2    Copyright (C) 2000, 2001, 2002  Free Software Foundation, Inc.
   3
   4    This file is part of Bison, the GNU Compiler Compiler.
   5
   6    Bison is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2, or (at your option)
   9    any later version.
  10
  11    Bison is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with Bison; see the file COPYING.  If not, write to
  18    the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19    Boston, MA 02111-1307, USA.  */
  20
  21 #ifndef READER_H_
  22 # define READER_H_
  23
  24 typedef struct symbol_list
  25 {
  26   struct symbol_list *next;
  27   symbol_t *sym;
  28   int line;
  29
  30   /* The action is attached to the LHS of a rule. */
  31   const char *action;
  32   int action_line;
  33
  34   symbol_t *ruleprec;
  35 } symbol_list;
  36
  37 # include "parse-gram.h"
  38
  39 typedef int location_t;
  40
  41 /* Initialize LOC. */
  42 # define LOCATION_RESET(Loc)                  \
  43   (Loc).first_column = (Loc).first_line = 1;  \
  44   (Loc).last_column =  (Loc).last_line = 1;
  45
  46 /* Advance of NUM columns. */
  47 # define LOCATION_COLUMNS(Loc, Num)           \
  48   (Loc).last_column += Num;
  49
  50 /* Advance of NUM lines. */
  51 # define LOCATION_LINES(Loc, Num)             \
  52   (Loc).last_column = 1;                      \
  53   (Loc).last_line += Num;
  54
  55 /* Restart: move the first cursor to the last position. */
  56 # define LOCATION_STEP(Loc)                   \
  57   (Loc).first_column = (Loc).last_column;     \
  58   (Loc).first_line = (Loc).last_line;
  59
  60 /* Output LOC on the stream OUT. */
  61 # define LOCATION_PRINT(Out, Loc)                               \
  62   fprintf (stderr, "%s:", infile);                              \
  63   if ((Loc).first_line != (Loc).last_line)                      \
  64     fprintf (Out, "%d.%d-%d.%d",                                \
  65              (Loc).first_line, (Loc).first_column,              \
  66              (Loc).last_line, (Loc).last_column - 1);           \
  67   else if ((Loc).first_column < (Loc).last_column - 1)          \
  68     fprintf (Out, "%d.%d-%d", (Loc).first_line,                 \
  69              (Loc).first_column, (Loc).last_column - 1);        \
  70   else                                                          \
  71     fprintf (Out, "%d.%d", (Loc).first_line, (Loc).first_column)
  72
  73 typedef struct gram_control_s
  74 {
  75   int errcode;
  76 } gram_control_t;
  77
  78 /* From the scanner.  */
  79 extern FILE *gram_in;
  80 extern int gram__flex_debug;
  81 void scanner_last_string_free PARAMS ((void));
  82 void scanner_free PARAMS ((void));
  83
  84 # define YY_DECL \
  85   int gram_lex (yystype *yylval, yyltype *yylloc, \
  86                 gram_control_t *yycontrol)
  87 YY_DECL;
  88
  89
  90 /* From the parser.  */
  91 extern int gram_debug;
  92 void gram_error (gram_control_t *control,
  93                  yyltype *loc, const char *msg);
  94 int gram_parse (void *control);
  95
  96 char *get_type_name PARAMS ((int n, symbol_list *rule));
  97 extern int typed;
  98
  99 /* From reader.c. */
 100 void grammar_start_symbol_set PARAMS ((symbol_t *s));
 101 void prologue_augment PARAMS ((const char *prologue, location_t location));
 102 void epilogue_set PARAMS ((const char *epilogue, location_t location));
 103 void grammar_symbol_append PARAMS ((symbol_t *s));
 104 void grammar_rule_begin PARAMS ((symbol_t *lhs));
 105 void grammar_rule_end PARAMS ((void));
 106 void grammar_midrule_action PARAMS ((void));
 107 void grammar_current_rule_prec_set PARAMS ((symbol_t *precsym));
 108 void grammar_current_rule_symbol_append PARAMS ((symbol_t *symbol));
 109 void grammar_current_rule_action_append PARAMS ((const char *action,
 110                                                  int line));
 111 extern symbol_list *current_rule;
 112 void reader PARAMS ((void));
 113
 114 #endif /* !READER_H_ */