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1 | // Copyright 2013 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. | |
1a4d82fc | 10 | // |
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11 | |
12 | pub trait Clone2 { | |
62682a34 | 13 | /// Returns a copy of the value. The contents of boxes |
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14 | /// are copied to maintain uniqueness, while the contents of |
15 | /// managed pointers are not copied. | |
16 | fn clone(&self) -> Self; | |
17 | } | |
18 | ||
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19 | trait Getter<T: Clone> { |
20 | fn do_get(&self) -> T; | |
21 | ||
22 | fn do_get2(&self) -> (T, T) { | |
23 | let x = self.do_get(); | |
24 | (x.clone(), x.clone()) | |
25 | } | |
26 | ||
27 | } | |
28 | ||
c34b1796 AL |
29 | impl Getter<isize> for isize { |
30 | fn do_get(&self) -> isize { *self } | |
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31 | } |
32 | ||
33 | impl<T: Clone> Getter<T> for Option<T> { | |
1a4d82fc | 34 | fn do_get(&self) -> T { self.as_ref().unwrap().clone() } |
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35 | } |
36 | ||
37 | ||
1a4d82fc | 38 | pub fn main() { |
970d7e83 | 39 | assert_eq!(3.do_get2(), (3, 3)); |
1a4d82fc | 40 | assert_eq!(Some("hi".to_string()).do_get2(), ("hi".to_string(), "hi".to_string())); |
970d7e83 | 41 | } |