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 #![feature(unsafe_destructor)]
20 impl<'a> Drop for dtor<'a> {
22 self.x.set(self.x.get() - 1);
26 fn unwrap<T>(o: Option<T>) -> T {
34 let x = &Cell::new(1);
37 let b = Some(dtor { x:x });
41 assert_eq!(x.get(), 0);