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223e47cc LB |
1 | // Copyright 2012 The Rust Project Developers. See the COPYRIGHT |
2 | // file at the top-level directory of this distribution and at | |
3 | // http://rust-lang.org/COPYRIGHT. | |
4 | // | |
5 | // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or | |
6 | // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license | |
7 | // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your | |
8 | // option. This file may not be copied, modified, or distributed | |
9 | // except according to those terms. | |
10 | ||
1a4d82fc JJ |
11 | #![allow(unknown_features)] |
12 | #![feature(box_syntax)] | |
13 | ||
223e47cc LB |
14 | trait Foo<T> { |
15 | fn get(&self) -> T; | |
16 | } | |
17 | ||
18 | struct S { | |
19 | x: int | |
20 | } | |
21 | ||
22 | impl Foo<int> for S { | |
23 | fn get(&self) -> int { | |
24 | self.x | |
25 | } | |
26 | } | |
27 | ||
28 | pub fn main() { | |
1a4d82fc JJ |
29 | let x = box S { x: 1 }; |
30 | let y = x as Box<Foo<int>>; | |
970d7e83 | 31 | assert_eq!(y.get(), 1); |
223e47cc | 32 | } |