1 // Copyright 2013 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 // no-pretty-expanded FIXME #15189
13 use std::iter::Unfold;
15 // Unfold had a bug with 'a that mean it didn't work
19 fn count(st: &mut uint) -> Option<uint> {
29 let mut it = Unfold::new(0, count);
32 assert_eq!(counted, i);