3 #![allow(non_camel_case_types)]
6 struct shrinky_pointer<'a> {
10 impl<'a> Drop for shrinky_pointer<'a> {
12 println!("Hello!"); self.i.set(self.i.get() - 1);
16 impl<'a> shrinky_pointer<'a> {
17 pub fn look_at(&self) -> isize { return self.i.get(); }
20 fn shrinky_pointer(i: &Cell<isize>) -> shrinky_pointer {
27 let my_total = &Cell::new(10);
28 { let pt = shrinky_pointer(my_total); assert_eq!(pt.look_at(), 10); }
29 println!("my_total = {}", my_total.get());
30 assert_eq!(my_total.get(), 9);