-/* 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, 2006
Free Software Foundation, Inc.
This file is part of Bison, the GNU Compiler Compiler.
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_
+# include "assoc.h"
# include "location.h"
+# include "uniqstr.h"
/*----------.
| Symbols. |
`----------*/
-/* Associativity values for tokens and rules. */
-typedef enum
-{
- undef_assoc,
- right_assoc,
- left_assoc,
- non_assoc
-} associativity;
-
-
/* Symbol classes. */
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;
+
+ /* Does not own the memory. */
+ const char *destructor;
+ location destructor_location;
+
+ /* Does not own the memory. */
+ const 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;
+ bool declared;
};
/* Undefined user number. */
#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 (symbol *s, FILE *f);
/* Fetch (or create) the symbol associated to KEY. */
-symbol_t *getsym PARAMS ((const char *key));
+symbol *symbol_from_uniqstr (const uniqstr key, location loc);
-/* Declare the new SYMBOL. Make it an alias of SYMVAL. */
-void symbol_make_alias PARAMS ((symbol_t *symbol, symbol_t *symval));
+/* Fetch (or create) the symbol associated to KEY. */
+symbol *symbol_get (const char *key, location loc);
-/* Set the TYPE_NAME associated to SYMBOL. Does nothing if passed 0 as
+/* 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 PARAMS ((symbol_t *symbol, char *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, const char *destructor, location loc);
-/* Set the PRECEDENCE associated to SYMBOL. Ensures that SYMBOL is a
- terminal. Does nothing if invoked with UNDEF_ASSOC as ASSOC. */
-void symbol_precedence_set PARAMS ((symbol_t *symbol,
- int prec, associativity assoc));
+/* Set the PRINTER associated with SYM. */
+void symbol_printer_set (symbol *sym, const char *printer, location loc);
-/* Set the CLASS associated to SYMBOL. */
-void symbol_class_set PARAMS ((symbol_t *symbol, symbol_class class));
+/* 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 USER_TOKEN_NUMBER associated to SYMBOL. */
-void symbol_user_token_number_set PARAMS ((symbol_t *symbol, int user_number));
+/* Set the CLASS associated with SYM. */
+void symbol_class_set (symbol *sym, symbol_class class, location loc,
+ bool declaring);
+
+/* 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_t *errtoken;
-extern symbol_t *undeftoken;
-extern symbol_t *eoftoken;
-extern symbol_t *axiom;
-extern symbol_t *startsymbol;
-extern location_t startsymbol_location;
+extern symbol *errtoken;
+extern symbol *undeftoken;
+extern symbol *endtoken;
+extern symbol *accept;
+extern symbol *startsymbol;
+extern location startsymbol_location;
/*---------------.
/* Create the symbol table. */
-void symbols_new PARAMS ((void));
-
-/* A function to apply to each symbol. */
-typedef bool (*symbol_processor) PARAMS ((symbol_t *));
-
-/* Apply PROCESSOR to all the symbols. PROCESSOR must return TRUE: on
- FALSE, the processing stops. */
-void symbols_do PARAMS ((symbol_processor processor, void *processor_data));
+void symbols_new (void);
/* Free all the memory allocated for symbols. */
-void symbols_free PARAMS ((void));
+void symbols_free (void);
/* Check that all the symbols are defined. Report any undefined
symbols and consider them nonterminals. */
-void symbols_check_defined PARAMS ((void));
+void symbols_check_defined (void);
/* Perform various sanity checks, assign symbol numbers, and set up
TOKEN_TRANSLATIONS. */
-void symbols_pack PARAMS ((void));
+void symbols_pack (void);
#endif /* !SYMTAB_H_ */
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