| // 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. |
| |
| struct closure_box<'self> { |
| cl: &'self fn(), |
| } |
| |
| fn box_it<'r>(x: &'r fn()) -> closure_box<'r> { |
| closure_box {cl: x} |
| } |
| |
| pub fn main() { |
| let mut i = 3; |
| let cl_box = box_it(|| i += 1); |
| assert_eq!(i, 3); |
| (cl_box.cl)(); |
| assert_eq!(i, 4); |
| } |
