Create `HvHasAUX()` macro

Gives a new name `SVphv_HasAUX` to the `SVf_OOK` flag, for use on HVs.

For back-compatibility with existing code we'll have to continue to use
the same bit position, at least for now. But at least code can use this
new name to be clearer about its intent.

1 files changed, 2 insertions, 3 deletions

diff --git a/sv.h b/sv.h
index 98995a3624..39edc140df 100644
--- a/sv.h
+++ b/sv.h
@@ -422,9 +422,8 @@ perform the upgrade if necessary.  See C<L</svtype>>.
                                            including PVLV-as-regex. See
                                            isREGEXP().
                                        */
-#define SVf_OOK		0x02000000  /* has valid offset value. For a PVHV this
-                                       means that a hv_aux struct is present
-                                       after the main array */
+#define SVf_OOK		0x02000000  /* has valid offset value */
+#define SVphv_HasAUX    SVf_OOK     /* PVHV has an additional hv_aux struct */
 #define SVf_BREAK	0x04000000  /* refcnt is artificially low - used by
                                        SVs in final arena cleanup.
                                        Set in S_regtry on PL_reg_curpm, so that