Have Bison grammars parsed by a Bison grammar.

[bison.git] / src / reader.h

diff --git a/src/reader.h b/src/reader.h
index c298891173e244a4c43e74ac25882c58b7702401..6311fe865c49e8ac7173d4089a296683a63a824b 100644 (file)
--- a/src/reader.h
+++ b/src/reader.h
@@ -1,5 +1,5 @@
 /* Input parser for bison
-   Copyright 2000 Free Software Foundation, Inc.
+   Copyright (C) 2000, 2001, 2002  Free Software Foundation, Inc.
 
    This file is part of Bison, the GNU Compiler Compiler.
 
@@ -21,19 +21,92 @@
 #ifndef READER_H_
 # define READER_H_
 
-/* Read in the grammar specification and record it in the format
-   described in gram.h.  All guards are copied into the FGUARD file
-   and all actions into FACTION, in each case forming the body of a C
-   function (YYGUARD or YYACTION) which contains a switch statement to
-   decide which guard or action to execute.  */
+typedef struct symbol_list
+{
+  struct symbol_list *next;
+  symbol_t *sym;
+  int line;
 
-extern void reader PARAMS ((void));
+  /* The action is attached to the LHS of a rule. */
+  const char *action;
+  int action_line;
 
+  symbol_t *ruleprec;
+} symbol_list;
 
-extern void reader_output_yylsp PARAMS ((struct obstack *));
+# include "parse-gram.h"
 
-extern int lineno;
-extern char **tags;
-extern short *user_toknums;
+typedef int location_t;
+
+/* Initialize LOC. */
+# define LOCATION_RESET(Loc)                  \
+  (Loc).first_column = (Loc).first_line = 1;  \
+  (Loc).last_column =  (Loc).last_line = 1;
+
+/* Advance of NUM columns. */
+# define LOCATION_COLUMNS(Loc, Num)           \
+  (Loc).last_column += Num;
+
+/* Advance of NUM lines. */
+# define LOCATION_LINES(Loc, Num)             \
+  (Loc).last_column = 1;                      \
+  (Loc).last_line += Num;
+
+/* Restart: move the first cursor to the last position. */
+# define LOCATION_STEP(Loc)                   \
+  (Loc).first_column = (Loc).last_column;     \
+  (Loc).first_line = (Loc).last_line;
+
+/* Output LOC on the stream OUT. */
+# define LOCATION_PRINT(Out, Loc)                               \
+  fprintf (stderr, "%s:", infile);                             \
+  if ((Loc).first_line != (Loc).last_line)                      \
+    fprintf (Out, "%d.%d-%d.%d",                                \
+             (Loc).first_line, (Loc).first_column,              \
+             (Loc).last_line, (Loc).last_column - 1);           \
+  else if ((Loc).first_column < (Loc).last_column - 1)          \
+    fprintf (Out, "%d.%d-%d", (Loc).first_line,                 \
+             (Loc).first_column, (Loc).last_column - 1);        \
+  else                                                          \
+    fprintf (Out, "%d.%d", (Loc).first_line, (Loc).first_column)
+
+typedef struct gram_control_s
+{
+  int errcode;
+} gram_control_t;
+
+/* From the scanner.  */
+extern FILE *gram_in;
+extern int gram__flex_debug;
+
+# define YY_DECL \
+  int gram_lex (yystype *yylval, yyltype *yylloc, \
+               gram_control_t *yycontrol)
+YY_DECL;
+
+
+/* From the parser.  */
+extern int gram_debug;
+void gram_error (gram_control_t *control,
+                yyltype *loc, const char *msg);
+int gram_parse (void *control);
+
+char *get_type_name PARAMS ((int n, symbol_list *rule));
+extern int typed;
+
+/* From reader.c. */
+void grammar_start_symbol_set PARAMS ((symbol_t *s));
+void prologue_augment PARAMS ((const char *prologue, location_t location));
+void epilogue_set PARAMS ((const char *epilogue, location_t location));
+void grammar_symbol_append PARAMS ((symbol_t *s));
+void grammar_rule_begin PARAMS ((symbol_t *lhs));
+void grammar_rule_end PARAMS ((void));
+void grammar_midrule_action PARAMS ((void));
+void grammar_current_rule_prec_set PARAMS ((symbol_t *precsym));
+void grammar_current_rule_symbol_append PARAMS ((symbol_t *symbol));
+void grammar_current_rule_action_append PARAMS ((const char *action,
+                                                int line));
+extern symbol_list *current_rule;
+void reader PARAMS ((void));
 
 #endif /* !READER_H_ */