65 lines
1.3 KiB
Rust
65 lines
1.3 KiB
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.
|
|
|
|
#[feature(managed_boxes)];
|
|
|
|
trait noisy {
|
|
fn speak(&self);
|
|
}
|
|
|
|
struct cat {
|
|
priv meows : uint,
|
|
|
|
how_hungry : int,
|
|
name : ~str,
|
|
}
|
|
|
|
impl cat {
|
|
pub fn eat(&self) -> bool {
|
|
if self.how_hungry > 0 {
|
|
error!("OM NOM NOM");
|
|
self.how_hungry -= 2;
|
|
return true;
|
|
}
|
|
else {
|
|
error!("Not hungry!");
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
|
|
impl noisy for cat {
|
|
fn speak(&self) { self.meow(); }
|
|
|
|
}
|
|
|
|
impl cat {
|
|
fn meow(&self) {
|
|
error!("Meow");
|
|
self.meows += 1;
|
|
if self.meows % 5 == 0 {
|
|
self.how_hungry += 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
fn cat(in_x : uint, in_y : int, in_name: ~str) -> cat {
|
|
cat {
|
|
meows: in_x,
|
|
how_hungry: in_y,
|
|
name: in_name
|
|
}
|
|
}
|
|
|
|
fn main() {
|
|
let nyan : @noisy = @cat(0, 2, ~"nyan") as @noisy;
|
|
nyan.eat(); //~ ERROR does not implement any method in scope named `eat`
|
|
}
|