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// Copyright 2012-2014 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(non_camel_case_types)]
#[cfg(feature = "use_core")]
extern crate core;
#[macro_use]
extern crate derivative;
trait noisy {
fn speak(&mut self);
}
#[derive(Derivative)]
#[derivative(Clone)]
struct cat {
meows : usize,
how_hungry : isize,
name : String,
}
impl cat {
fn meow(&mut self) {
println!("Meow");
self.meows += 1_usize;
if self.meows % 5_usize == 0_usize {
self.how_hungry += 1;
}
}
}
impl cat {
pub fn eat(&mut self) -> bool {
if self.how_hungry > 0 {
println!("OM NOM NOM");
self.how_hungry -= 2;
true
} else {
println!("Not hungry!");
false
}
}
}
impl noisy for cat {
fn speak(&mut self) { self.meow(); }
}
fn cat(in_x : usize, in_y : isize, in_name: String) -> cat {
cat {
meows: in_x,
how_hungry: in_y,
name: in_name,
}
}
fn make_speak<C:noisy>(mut c: C) {
c.speak();
}
#[test]
fn main() {
let mut nyan = cat(0_usize, 2, "nyan".to_string());
nyan.eat();
assert!((!nyan.eat()));
for _ in 1_usize..10_usize {
make_speak(nyan.clone());
}
}
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