object state stackbuf count -> countByEnumeratingWithState:objects:count: :> items-count
items-count 0 = [
state itemsPtr>> [ items-count id <c-direct-array> ] [ stackbuf ] if* :> items
- items-count iota [ items nth quot call ] each
+ items-count <iota> [ items nth quot call ] each
object quot state stackbuf count (NSFastEnumeration-each)
] unless ; inline recursive