Better descriptions for PL_regex_pad and PL_regex_padav.

p4raw-id: //depot/perl@32944

diff --git a/intrpvar.h b/intrpvar.h
index 10d8c12..153b2b8 100644 (file)
--- a/intrpvar.h
+++ b/intrpvar.h
@@ -561,9 +561,12 @@ PERLVAR(Inumeric_radix_sv, SV *)   /* The radix separator if not '.' */
 #endif
 
 #if defined(USE_ITHREADS)
-PERLVAR(Iregex_pad,     SV**)          /* All regex objects */
-PERLVAR(Iregex_padav,   AV*)           /* All regex objects */
-
+PERLVAR(Iregex_pad,     SV**)          /* Shortcut into the array of
+                                          regex_padav */
+PERLVAR(Iregex_padav,   AV*)           /* All regex objects, indexed via the
+                                          values in op_pmoffset of pmop.
+                                          Entry 0 is an array of IVs listing
+                                          the now-free slots in the array */
 #endif
 
 #ifdef USE_REENTRANT_API