--- reg
+++ reg
@@ -53,4 +53,7 @@
 <token: object>
   (?: <.begin_object> (?: (?: <[member]> (?: (?: <.value_separator><[member]> ) )*  ) )? <.end_object> )
+  (?{
+    $MATCH = { map { @$_ } @{$MATCH{member}} };
+  })
 
 <token: member>