| // run-pass | |
| #![feature(box_syntax)] | |
| trait T { | |
| fn print(&self); | |
| } | |
| #[derive(Debug)] | |
| struct S { | |
| s: isize, | |
| } | |
| impl T for S { | |
| fn print(&self) { | |
| println!("{:?}", self); | |
| } | |
| } | |
| fn print_t(t: &dyn T) { | |
| t.print(); | |
| } | |
| fn print_s(s: &S) { | |
| s.print(); | |
| } | |
| pub fn main() { | |
| let s: Box<S> = box S { s: 5 }; | |
| print_s(&*s); | |
| let t: Box<dyn T> = s as Box<dyn T>; | |
| print_t(&*t); | |
| } |