-#define SYMBOL_TT 0 /* value = index in symbol table */
-#define NUMBER_TT 1 /* value = the number */
-#define DQ_TT 2 /* no value */
-#define SQ_TT 3 /* no value */
-#define SEP_TT 4 /* value = the _SEP code */
-#define EOF_TT 5 /* no value */
+#define SYMBOL_TT 0 /* symbol.
+ value = index in symbol table */
+#define NUMBER_TT 1 /* number (including hex, float,
+ etc).
+ value = the number */
+#define DQ_TT 2 /* double-quoted string.
+ no value; look at the text */
+#define SQ_TT 3 /* single-quoted string.
+ no value */
+#define UQ_TT 4 /* unquoted string; only when
+ dont_enter_into_symbol_table
+ is true.
+ no value */
+#define SEP_TT 5 /* separator (punctuation).
+ value = the _SEP code */
+#define EOF_TT 6 /* end of file.
+ no value */