//@ run-pass
#![allow(dead_code)]
struct Triple<T> { x: T, y: T, z: T }
fn box_it<T>(x: Triple<T>) -> Box<Triple<T>> { return Box::new(x); }
pub fn main() {
let x: Box<Triple<isize>> = box_it::<isize>(Triple{x: 1, y: 2, z: 3});
assert_eq!(x.y, 2);
}