Yeah. it's bit awkward to make `Option` implement `IntoIterator` and can certainly cause some weird and subtle bugs. But on the other hand it does make a whole

Yeah. it's bit awkward to make `Option` implement `IntoIterator` and can certainly cause some weird and subtle bugs. But on the other hand it does make a whole lot of things work nicely. For example, you can turn a `Vec<Option<T>>` into a `Vet<T>` trivially with `foo.into_iter().flatten().collect()`. And generally it's nice to have Option and Vec composable.