For loops are sugar around an Iterator instantiation: for i in 0..10 {} translates to roughly let mut iter = Range { start: 0, end: 10 }.into_iter(); w

For loops are sugar around an Iterator instantiation: for i in 0..10 {} translates to roughly let mut iter = Range { start: 0, end: 10 }.into_iter(); while let Some(i) = iter.next() {}