31 lines
784 B
Rust
31 lines
784 B
Rust
// Copyright 2012 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.
|
|
|
|
#[allow(default_methods)];
|
|
|
|
trait Cat {
|
|
fn meow(&self) -> bool;
|
|
fn scratch(&self) -> bool;
|
|
fn purr(&self) -> bool { true }
|
|
}
|
|
|
|
impl Cat for int {
|
|
fn meow(&self) -> bool {
|
|
self.scratch()
|
|
}
|
|
fn scratch(&self) -> bool {
|
|
self.purr()
|
|
}
|
|
}
|
|
|
|
pub fn main() {
|
|
assert!(5.meow());
|
|
}
|