1 // Copyright 2012 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 #![allow(unknown_features)]
12 #![feature(unboxed_closures, core)]
14 struct closure_box<'a> {
15 cl: Box<FnMut() + 'a>,
18 fn box_it<'a>(x: Box<FnMut() + 'a>) -> closure_box<'a> {
27 // FIXME (#22405): Replace `Box::new` with `box` here when/if possible.
28 let mut cl_box = box_it(Box::new(cl));
29 cl_box.cl.call_mut(());