Can I assign an index to an exploded array?

I'm doing a LATERAL EXPLODE on an array in Hive, is there a way of reliably assigning a row number based on the array element? It looks like calling row_number() on the results of the LATERAL EXPLODE works, but I don't know if that is dependable. It does seem to be in practice. We're doing this now and have never encountered a case where the elements have been enumerated incorrectly.