doio.c: Add some comments

[perl5.git] / hv.h

diff --git a/hv.h b/hv.h
index e45460a..05245d5 100644 (file)
--- a/hv.h
+++ b/hv.h
@@ -509,6 +509,9 @@ struct refcounted_he;
 
 /* flags for the refcounted_he API */
 #define REFCOUNTED_HE_KEY_UTF8         0x00000001
+#ifdef PERL_CORE
+# define REFCOUNTED_HE_EXISTS          0x00000002
+#endif
 
 #ifdef PERL_CORE