further speeding up of is_utf8_string()

[p5sagit/p5-mst-13.2.git] / sv.h

diff --git a/sv.h b/sv.h
index a8dcc5b..15d90a9 100644 (file)
--- a/sv.h
+++ b/sv.h
@@ -225,7 +225,10 @@ perform the upgrade if necessary.  See C<svtype>.
 #define SVf_ROK                0x00080000      /* has a valid reference pointer */
 
 #define SVf_FAKE       0x00100000      /* glob or lexical is just a copy */
-#define SVf_OOK                0x00200000      /* has valid offset value */
+#define SVf_OOK                0x00200000      /* has valid offset value
+                                          For a PVHV this means that a
+                                          hv_aux struct is present after the
+                                          main array  */
 #define SVf_BREAK      0x00400000      /* refcnt is artificially low - used
                                         * by SV's in final arena  cleanup */
 #define SVf_READONLY   0x00800000      /* may not be modified */