| // Copyright 2012 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. |
| |
| |
| fn takes_two(x: &isize, y: &isize) -> isize { *x + *y } |
| |
| fn with<T, F>(f: F) -> T where F: FnOnce(&isize) -> T { |
| f(&20) |
| } |
| |
| fn has_one<'a>(x: &'a isize) -> isize { |
| with(|y| takes_two(x, y)) |
| } |
| |
| pub fn main() { |
| assert_eq!(has_one(&2), 22); |
| } |
