62 lines
924 B
Rust
62 lines
924 B
Rust
#[legacy_modes];
|
|
|
|
trait noisy {
|
|
fn speak();
|
|
}
|
|
|
|
struct cat {
|
|
priv mut meows : uint,
|
|
|
|
mut how_hungry : int,
|
|
name : ~str,
|
|
}
|
|
|
|
priv impl cat {
|
|
fn meow() {
|
|
error!("Meow");
|
|
self.meows += 1u;
|
|
if self.meows % 5u == 0u {
|
|
self.how_hungry += 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
impl cat {
|
|
fn eat() -> bool {
|
|
if self.how_hungry > 0 {
|
|
error!("OM NOM NOM");
|
|
self.how_hungry -= 2;
|
|
return true;
|
|
}
|
|
else {
|
|
error!("Not hungry!");
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
|
|
impl cat : noisy {
|
|
fn speak() { self.meow(); }
|
|
}
|
|
|
|
fn cat(in_x : uint, in_y : int, in_name: ~str) -> cat {
|
|
cat {
|
|
meows: in_x,
|
|
how_hungry: in_y,
|
|
name: in_name
|
|
}
|
|
}
|
|
|
|
|
|
fn make_speak<C: noisy>(c: C) {
|
|
c.speak();
|
|
}
|
|
|
|
fn main() {
|
|
let nyan = cat(0u, 2, ~"nyan");
|
|
nyan.eat();
|
|
assert(!nyan.eat());
|
|
for uint::range(1u, 10u) |_i| { make_speak(nyan); };
|
|
assert(nyan.eat());
|
|
}
|