I agree, the current implementation is really not sufficient, at least for this. I played around with lazy iteration a while back and found the current restrict

I agree, the current implementation is really not sufficient, at least for this. I played around with lazy iteration a while back and found the current restrictions would make working with it an annoyance. I've placed some thoughts in the Readme [1] so I don't forget. Hopefully at least some of the restrictions will be dropped. 1: https://github.com/urandom/iter https://github.com/urandom/iter