cub::ReduceByKeyScanTileState

template<typename ValueT, typename KeyT, bool SingleWord = (detail::is_primitive<ValueT>::value || ::cuda::std::is_trivially_copyable_v<ValueT>) && (sizeof(ValueT) + sizeof(KeyT) < detail::largest_atomic_message_size)>
struct ReduceByKeyScanTileState

Tile status interface for reduction by key.