| // Copyright 2013 The Rust Project Developers. See the COPYRIGHT |
| // file at the top-level directory of this distribution and at |
| // http://rust-lang.org/COPYRIGHT. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| |
| // compile-pass |
| |
| #![feature(nll)] |
| |
| 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<_>>()); |
| } |
