| // Copyright 2013 The Rust Project Developers. See the COPYRIGHT |
| // file at the top-level directory of this distribution and at |
| // http://rust-lang.org/COPYRIGHT. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| // |
| |
| pub trait Clone2 { |
| /// Returns a copy of the value. The contents of boxes |
| /// are copied to maintain uniqueness, while the contents of |
| /// managed pointers are not copied. |
| fn clone(&self) -> Self; |
| } |
| |
| trait Getter<T: Clone> { |
| fn do_get(&self) -> T; |
| |
| fn do_get2(&self) -> (T, T) { |
| let x = self.do_get(); |
| (x.clone(), x.clone()) |
| } |
| |
| } |
| |
| impl Getter<isize> for isize { |
| fn do_get(&self) -> isize { *self } |
| } |
| |
| impl<T: Clone> Getter<T> for Option<T> { |
| fn do_get(&self) -> T { self.as_ref().unwrap().clone() } |
| } |
| |
| |
| pub fn main() { |
| assert_eq!(3.do_get2(), (3, 3)); |
| assert_eq!(Some("hi".to_string()).do_get2(), ("hi".to_string(), "hi".to_string())); |
| } |
