| // 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. |
| |
| #![feature(box_syntax)] |
| |
| use std::cell::Cell; |
| |
| // Resources can't be copied, but storing into data structures counts |
| // as a move unless the stored thing is used afterwards. |
| |
| struct r<'a> { |
| i: &'a Cell<isize>, |
| } |
| |
| struct BoxR<'a> { x: r<'a> } |
| |
| impl<'a> Drop for r<'a> { |
| fn drop(&mut self) { |
| self.i.set(self.i.get() + 1) |
| } |
| } |
| |
| fn r(i: &Cell<isize>) -> r { |
| r { |
| i: i |
| } |
| } |
| |
| fn test_rec() { |
| let i = &Cell::new(0); |
| { |
| let _a = BoxR {x: r(i)}; |
| } |
| assert_eq!(i.get(), 1); |
| } |
| |
| fn test_tag() { |
| enum t<'a> { |
| t0(r<'a>), |
| } |
| |
| let i = &Cell::new(0); |
| { |
| let _a = t::t0(r(i)); |
| } |
| assert_eq!(i.get(), 1); |
| } |
| |
| fn test_tup() { |
| let i = &Cell::new(0); |
| { |
| let _a = (r(i), 0); |
| } |
| assert_eq!(i.get(), 1); |
| } |
| |
| fn test_unique() { |
| let i = &Cell::new(0); |
| { |
| let _a: Box<_> = box r(i); |
| } |
| assert_eq!(i.get(), 1); |
| } |
| |
| fn test_unique_rec() { |
| let i = &Cell::new(0); |
| { |
| let _a: Box<_> = box BoxR { |
| x: r(i) |
| }; |
| } |
| assert_eq!(i.get(), 1); |
| } |
| |
| pub fn main() { |
| test_rec(); |
| test_tag(); |
| test_tup(); |
| test_unique(); |
| test_unique_rec(); |
| } |