#define HINT_NEW_STRING 0x00008000
#define HINT_NEW_RE 0x00010000
#define HINT_LOCALIZE_HH 0x00020000 /* %^H needs to be copied */
-#define HINT_LEXICAL_IO 0x00040000 /* ${^OPEN} is set */
+#define HINT_LEXICAL_IO_IN 0x00040000 /* ${^OPEN} is set for input */
+#define HINT_LEXICAL_IO_OUT 0x00080000 /* ${^OPEN} is set for output */
#define HINT_RE_TAINT 0x00100000 /* re pragma */
#define HINT_RE_EVAL 0x00200000 /* re pragma */