1 // Copyright 2015 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.
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.
13 // Get<T> is covariant in T
18 struct Cloner<T:Clone> {
22 impl<T:Clone> Get<T> for Cloner<T> {
28 fn get<'a, G>(get: &G) -> i32
29 where G : Get<&'a i32>
31 // This call only type checks if we can use `G : Get<&'a i32>` as
32 // evidence that `G : Get<&'b i32>` where `'a : 'b`.
36 fn pick<'b, G>(get: &'b G, if_odd: &'b i32) -> i32
37 where G : Get<&'b i32>
40 if v % 2 != 0 { v } else { *if_odd }
44 let x = Cloner { t: &23 };