| // 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. |
| |
| use std::cell::Cell; |
| |
| struct r<'a> { |
| b: &'a Cell<isize>, |
| } |
| |
| impl<'a> Drop for r<'a> { |
| fn drop(&mut self) { |
| self.b.set(self.b.get() + 1); |
| } |
| } |
| |
| fn r(b: &Cell<isize>) -> r { |
| r { |
| b: b |
| } |
| } |
| |
| pub fn main() { |
| let b = &Cell::new(0); |
| { |
| let _p = Some(r(b)); |
| } |
| |
| assert_eq!(b.get(), 1); |
| } |
