src/test/ui/issues/issue-49579.rs

   1 // check-pass
   2
   3 fn fibs(n: u32) -> impl Iterator<Item=u128> {
   4     (0 .. n)
   5     .scan((0, 1), |st, _| {
   6         *st = (st.1, st.0 + st.1);
   7         Some(*st)
   8     })
   9     .map(&|(f, _)| f)
  10 }
  11
  12 fn main() {
  13     println!("{:?}", fibs(10).collect::<Vec<_>>());
  14 }