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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. | |
1a4d82fc | 10 | // |
223e47cc | 11 | |
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12 | |
13 | trait Cat { | |
14 | fn meow(&self) -> bool; | |
15 | fn scratch(&self) -> bool; | |
16 | fn purr(&self) -> bool { true } | |
17 | } | |
18 | ||
c34b1796 | 19 | impl Cat for isize { |
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20 | fn meow(&self) -> bool { |
21 | self.scratch() | |
22 | } | |
23 | fn scratch(&self) -> bool { | |
24 | self.purr() | |
25 | } | |
26 | } | |
27 | ||
28 | pub fn main() { | |
29 | assert!(5.meow()); | |
30 | } |