[gregwebs]

Not all impure iterators can be resumed. But any pure iterator can be converted to a resumable iterator with a generic conversion function.

[catlifeonmars]

> any pure iterator can be converted to a resumable iterator with a generic conversion function.

Makes sense

> Not all impure iterators can be resumed

How do you mean? In my head resuming an iterator is just partially unrolling a loop.

[nine_k]

An impure iterator can panic, so you can't resume?