rust for loop

gistfile1.txt

struct NiceStructure<'a, T: Iterator<Item=&'a u32>> {
    it: T
}

fn f<'a, T: Iterator<Item=&'a u32>>(it: &mut NiceStructure<'a, T>) {
    // This does not work: cannot move out of borrowed content
    // for x in it.it {
    //     println!("Element {:?}", x);
    // }
    // This works
    while let Some(x) = it.it.next() {
        println!("Element {:?}", x)
    }
}