2 #![feature(box_syntax)]
8 trait Changer : Sized {
9 fn change(mut self) -> Self {
14 fn change_again(mut self: Box<Self>) -> Box<Self> {
19 fn set_to(&mut self, a: isize);
23 fn set_to(&mut self, a: isize) {
30 let new_x = x.change();
31 assert_eq!(new_x.a, 55);
33 let x: Box<_> = box new_x;
34 let new_x = x.change_again();
35 assert_eq!(new_x.a, 45);