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// 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.
#![allow(non_camel_case_types)]
use std::cell::Cell;
#[derive(Debug)]
struct r<'a> {
i: &'a Cell<isize>,
}
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
}
}
pub fn main() {
let i = &Cell::new(0);
// Even though these look like copies, they are guaranteed not to be
{
let a = r(i);
let b = (a, 10);
let (c, _d) = b;
println!("{:?}", c);
}
assert_eq!(i.get(), 1);
}
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