X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/340ef489223a5d1f9c40674ea2973435cb8ecc1b..7ea5e9779b59230a43edfe24cf395a47841a3823:/src/symtab.h

diff --git a/src/symtab.h b/src/symtab.h
index 03ae90f4..c64e4079 100644
--- a/src/symtab.h
+++ b/src/symtab.h
@@ -1,5 +1,5 @@
 /* Definitions for symtab.c and callers, part of bison,
-   Copyright (C) 1984, 1989, 1992, 2000 Free Software Foundation, Inc.
+   Copyright 1984, 1989, 1992, 2000, 2001  Free Software Foundation, Inc.
 
    This file is part of Bison, the GNU Compiler Compiler.
 
@@ -20,34 +20,43 @@
 
 #ifndef SYMTAB_H_
 # define SYMTAB_H_
+# include "gram.h"
 
 #define	TABSIZE	1009
 
 /*  symbol classes  */
 
-#define SUNKNOWN 0
-#define STOKEN	 1		/* terminal symbol */
-#define SNTERM	 2		/* non-terminal */
+typedef enum
+{
+  unknown_sym,
+  token_sym,		/* terminal symbol */
+  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
 {
+  /* Needed for the hash table. */
   struct bucket *link;
   struct bucket *next;
+
+  /* The key, name of the symbol. */
   char *tag;
+  /* Its type. */
   char *type_name;
   short value;
   short prec;
-  short assoc;
+  associativity assoc;
   short user_token_number;
-  /* special value SALIAS in the identifier half of the
-     identifier-symbol pair for an alias */
+
+  /* Points to the other in the identifier-symbol pair for an
+     alias. Special value SALIAS in the identifier half of the
+     identifier-symbol pair for an alias.  */
   struct bucket *alias;
-  /* points to the other in the identifier-symbol pair for an alias */
-  char class;
-}
-bucket;
+  symbol_class class;
+} bucket;
 
 
 extern bucket *firstsymbol;