| // Copyright 2014 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. |
| |
| |
| #![allow(unknown_features)] |
| #![feature(box_syntax)] |
| |
| fn borrow<F>(x: &isize, f: F) where F: FnOnce(&isize) { |
| f(x) |
| } |
| |
| fn test1(x: &Box<isize>) { |
| borrow(&*(*x).clone(), |p| { |
| let x_a = &**x as *const isize; |
| assert!((x_a as usize) != (p as *const isize as usize)); |
| assert_eq!(unsafe{*x_a}, *p); |
| }) |
| } |
| |
| pub fn main() { |
| test1(&box 22); |
| } |
