#ifndef SYMTAB_H_
# define SYMTAB_H_
+# include "struniq.h"
+# include "location.h"
+# include "assoc.h"
+
/*----------.
| Symbols. |
`----------*/
-/* Associativity values for tokens and rules. */
-typedef enum
-{
- right_assoc,
- left_assoc,
- non_assoc
-} associativity;
-
-
/* Symbol classes. */
typedef enum
{
/* Internal token numbers. */
typedef short symbol_number_t;
+#define SYMBOL_NUMBER_MAX ((symbol_number_t) SHRT_MAX)
typedef struct symbol_s symbol_t;
struct symbol_s
{
- /* The key, name of the symbol. */
+ /* The key, name of the symbol. */
char *tag;
- /* Its type. */
- char *type_name;
+ /* The location of its first occurence. */
+ location_t location;
+
+ /* Its %type and associated printer and destructor. */
+ struniq_t type_name;
+ char *destructor;
+ location_t destructor_location;
+ char *printer;
+ location_t printer_location;
symbol_number_t number;
short prec;
- associativity assoc;
+ assoc_t assoc;
int user_token_number;
/* Points to the other in the identifier-symbol pair for an alias.
/* Fetch (or create) the symbol associated to KEY. */
-symbol_t *getsym PARAMS ((const char *key));
+symbol_t *symbol_get (const char *key, location_t location);
+
+/* Generate a dummy nonterminal, whose name cannot conflict with the
+ user's names. */
+symbol_t *dummy_symbol_get (location_t location);
+
+/* Declare the new SYMBOL. Make it an alias of SYMVAL. */
+void symbol_make_alias (symbol_t *symbol, symbol_t *symval,
+ location_t location);
+
+/* Set the TYPE_NAME associated to SYMBOL. Does nothing if passed 0 as
+ TYPE_NAME. */
+void symbol_type_set (symbol_t *symbol,
+ char *type_name, location_t location);
+
+/* Set the DESTRUCTOR associated to SYMBOL. */
+void symbol_destructor_set (symbol_t *symbol,
+ char *destructor, location_t location);
+
+/* Set the PRINTER associated to SYMBOL. */
+void symbol_printer_set (symbol_t *symbol,
+ char *printer, location_t location);
+
+/* 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 (symbol_t *symbol,
+ int prec, assoc_t assoc, location_t location);
-/* Declare the new SYMBOL. Make it an alias of SYMVAL, and type */
-/* them with TYPENAME. */
-void symbol_make_alias PARAMS ((symbol_t *symbol, symbol_t *symval,
- char *typename));
+/* Set the CLASS associated to SYMBOL. */
+void symbol_class_set (symbol_t *symbol,
+ symbol_class class, location_t location);
-/* Set the TYPE_NAME associated to SYMBOL. */
-void symbol_type_set PARAMS ((symbol_t *symbol, char *type_name));
+/* Set the USER_TOKEN_NUMBER associated to SYMBOL. */
+void symbol_user_token_number_set (symbol_t *symbol,
+ int user_number, location_t location);
-/* Set the PRECEDENCE associated to SYMBOL. */
-void symbol_precedence_set PARAMS ((symbol_t *symbol,
- int prec, associativity assoc));
/* 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 *endtoken;
+extern symbol_t *accept;
extern symbol_t *startsymbol;
+extern location_t startsymbol_location;
/*---------------.
/* Create the symbol table. */
-void symbols_new PARAMS ((void));
+void symbols_new (void);
/* A function to apply to each symbol. */
-typedef bool (*symbol_processor) PARAMS ((symbol_t *));
+typedef bool (*symbol_processor) (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));
+/* Apply PROCESSOR to all the symbols. PROCESSOR must return true: on
+ false, the processing stops. */
+void symbols_do (symbol_processor processor, void *processor_data);
/* 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));
+/* Check that all the symbols are defined. Report any undefined
+ symbols and consider them nonterminals. */
+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_ */