rust/tests/ui/impl-trait/issue-49579.rs
2023-01-11 09:32:08 +00:00

15 lines
253 B
Rust

// check-pass
fn fibs(n: u32) -> impl Iterator<Item=u128> {
(0 .. n)
.scan((0, 1), |st, _| {
*st = (st.1, st.0 + st.1);
Some(*st)
})
.map(&|(f, _)| f)
}
fn main() {
println!("{:?}", fibs(10).collect::<Vec<_>>());
}