X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/72a23c9797290f1f2c948cf3027d80fa5c9370bc..efea623135d500d3d264f9710983d75435defde7:/src/symtab.h

diff --git a/src/symtab.h b/src/symtab.h
index fd355e1f..f95e7701 100644
--- a/src/symtab.h
+++ b/src/symtab.h
@@ -41,34 +41,51 @@ typedef enum
   nterm_sym		/* non-terminal */
 } symbol_class;
 
-#define SUNDEF  -1              /* For undefined user number. */
-#define SALIAS	-9991		/* for symbol generated with an alias */
 
-typedef struct bucket
+/* Internal token numbers. */
+typedef short symbol_number_t;
+
+
+typedef struct symbol_s symbol_t;
+struct symbol_s
 {
   /* The key, name of the symbol. */
   char *tag;
   /* Its type. */
   char *type_name;
-  short number;
+
+  symbol_number_t number;
   short prec;
   associativity assoc;
-  short user_token_number;
+  int user_token_number;
 
-  /* Points to the other in the identifier-symbol pair for an
-     alias. Special value SALIAS in the identifier half of the
+  /* 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.  */
-  struct bucket *alias;
+  symbol_t *alias;
   symbol_class class;
-} bucket;
+};
+
+/* Undefined user number.  */
+#define USER_NUMBER_UNDEFINED -1
+
+/* `symbol->user_token_number == USER_NUMBER_ALIAS' means this symbol
+   *has* (not is) a string literal alias.  For instance, `%token foo
+   "foo"' has `"foo"' numbered regularly, and `foo' numbered as
+   USER_NUMBER_ALIAS.  */
+#define USER_NUMBER_ALIAS -9991
+
+/* Undefined internal token number.  */
+#define NUMBER_UNDEFINED ((symbol_number_t) -1)
+
 
 /* A function to apply to each symbol. */
-typedef bool (*bucket_processor) PARAMS ((bucket *));
+typedef bool (*symbol_processor) PARAMS ((symbol_t *));
 
-bucket *getsym PARAMS ((const char *));
+symbol_t *getsym PARAMS ((const char *));
 
-void buckets_new PARAMS ((void));
-void buckets_do PARAMS ((bucket_processor processor, void *processor_data));
-void buckets_free PARAMS ((void));
+void symbols_new PARAMS ((void));
+void symbols_do PARAMS ((symbol_processor processor, void *processor_data));
+void symbols_free PARAMS ((void));
 
 #endif /* !SYMTAB_H_ */