* src/symtab.h, src/symtab.c (symbol_print): New.

[bison.git] / src / symtab.h

diff --git a/src/symtab.h b/src/symtab.h
index f95e77017a2f51034b82a054fa0493e6f8f6df5b..725b6cb8eed6a46c4adde4b324c7ebf4451df639 100644 (file)
--- a/src/symtab.h
+++ b/src/symtab.h
@@ -1,5 +1,6 @@
-/* Definitions for symtab.c and callers, part of bison,
-   Copyright (C) 1984, 1989, 1992, 2000, 2001, 2002
+/* Definitions for symtab.c and callers, part of Bison.
+
+   Copyright (C) 1984, 1989, 1992, 2000, 2001, 2002, 2004, 2005
    Free Software Foundation, Inc.
 
    This file is part of Bison, the GNU Compiler Compiler.
@@ -16,22 +17,19 @@
 
    You should have received a copy of the GNU General Public License
    along with Bison; see the file COPYING.  If not, write to
-   the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-   Boston, MA 02111-1307, USA.  */
+   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+   Boston, MA 02110-1301, USA.  */
 
 #ifndef SYMTAB_H_
 # define SYMTAB_H_
 
-#define        TABSIZE 1009
-
-/* Associativity values for tokens and rules.  */
-typedef enum
-{
-  right_assoc,
-  left_assoc,
-  non_assoc
-} associativity;
+# include "assoc.h"
+# include "location.h"
+# include "uniqstr.h"
 
+/*----------.
+| Symbols.  |
+`----------*/
 
 /* Symbol classes.  */
 typedef enum
@@ -43,26 +41,41 @@ typedef enum
 
 
 /* Internal token numbers. */
-typedef short symbol_number_t;
+typedef int symbol_number;
+#define SYMBOL_NUMBER_MAXIMUM INT_MAX
+
 
+typedef struct symbol symbol;
 
-typedef struct symbol_s symbol_t;
-struct symbol_s
+/* When extending this structure, be sure to complete
+   symbol_check_alias_consistency.  */
+struct symbol
 {
-  /* The key, name of the symbol. */
-  char *tag;
-  /* Its type. */
-  char *type_name;
-
-  symbol_number_t number;
-  short prec;
-  associativity assoc;
+  /* The key, name of the symbol.  */
+  uniqstr tag;
+  /* The location of its first occurrence.  */
+  location location;
+
+  /* Its %type and associated printer and destructor.  */
+  uniqstr type_name;
+  location type_location;
+
+  char *destructor;
+  location destructor_location;
+
+  char *printer;
+  location printer_location;
+
+  symbol_number number;
+  location prec_location;
+  int prec;
+  assoc assoc;
   int user_token_number;
 
   /* Points to the other in the identifier-symbol pair for an alias.
      Special value USER_NUMBER_ALIAS in the identifier half of the
      identifier-symbol pair for an alias.  */
-  symbol_t *alias;
+  symbol *alias;
   symbol_class class;
 };
 
@@ -76,16 +89,70 @@ struct symbol_s
 #define USER_NUMBER_ALIAS -9991
 
 /* Undefined internal token number.  */
-#define NUMBER_UNDEFINED ((symbol_number_t) -1)
+#define NUMBER_UNDEFINED (-1)
+
+/* Print a symbol (for debugging). */
+void symbol_print (FILE *f, symbol *s);
+
+/* Fetch (or create) the symbol associated to KEY.  */
+symbol *symbol_get (const char *key, location loc);
+
+/* Generate a dummy nonterminal, whose name cannot conflict with the
+   user's names.  */
+symbol *dummy_symbol_get (location loc);
+
+/* Declare the new symbol SYM.  Make it an alias of SYMVAL.  */
+void symbol_make_alias (symbol *sym, symbol *symval, location loc);
+
+/* Set the TYPE_NAME associated with SYM.  Do nothing if passed 0 as
+   TYPE_NAME.  */
+void symbol_type_set (symbol *sym, uniqstr type_name, location loc);
+
+/* Set the DESTRUCTOR associated with SYM.  */
+void symbol_destructor_set (symbol *sym, char *destructor, location loc);
+
+/* Set the PRINTER associated with SYM.  */
+void symbol_printer_set (symbol *sym, char *printer, location loc);
+
+/* Set the PRECEDENCE associated with SYM.  Ensure that SYMBOL is a
+   terminal.  Do nothing if invoked with UNDEF_ASSOC as ASSOC.  */
+void symbol_precedence_set (symbol *sym, int prec, assoc a, location loc);
+
+/* Set the CLASS associated with SYM.  */
+void symbol_class_set (symbol *sym, symbol_class class, location loc);
+
+/* Set the USER_TOKEN_NUMBER associated with SYM.  */
+void symbol_user_token_number_set (symbol *sym, int user_number, location loc);
+
+
+/* Distinguished symbols.  AXIOM is the real start symbol, that used
+   by the automaton.  STARTSYMBOL is the one specified by the user.
+   */
+extern symbol *errtoken;
+extern symbol *undeftoken;
+extern symbol *endtoken;
+extern symbol *accept;
+extern symbol *startsymbol;
+extern location startsymbol_location;
+
+
+/*---------------.
+| Symbol table.  |
+`---------------*/
+
 
+/* Create the symbol table.  */
+void symbols_new (void);
 
-/* A function to apply to each symbol. */
-typedef bool (*symbol_processor) PARAMS ((symbol_t *));
+/* Free all the memory allocated for symbols.  */
+void symbols_free (void);
 
-symbol_t *getsym PARAMS ((const char *));
+/* Check that all the symbols are defined.  Report any undefined
+   symbols and consider them nonterminals.  */
+void symbols_check_defined (void);
 
-void symbols_new PARAMS ((void));
-void symbols_do PARAMS ((symbol_processor processor, void *processor_data));
-void symbols_free PARAMS ((void));
+/* Perform various sanity checks, assign symbol numbers, and set up
+   TOKEN_TRANSLATIONS.  */
+void symbols_pack (void);
 
 #endif /* !SYMTAB_H_ */