X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/d7020c20785f7684de4f71ede4fe871fc16f61e7..4ec8e00f609b4a44c3c9e5a25c82706b393a0e16:/src/symtab.h

diff --git a/src/symtab.h b/src/symtab.h
index c68ec8fe..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.
 
@@ -33,25 +33,30 @@ 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
 {
+  /* 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;
   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 */
   symbol_class class;
-}
-bucket;
+} bucket;
 
 
 extern bucket *firstsymbol;