If you did not return a closure, you could set the metatables __pairs to use your function's. Sadly, you could not do this without keeping some sort of cache, w

If you did not return a closure, you could set the metatables __pairs to use your function's. Sadly, you could not do this without keeping some sort of cache, which would be a terrible waste of memory, but then again you're already creating an iterator that iterates completely, to me, this beats the use of an iterator (to not iterate over everything and break on a single pass)