55 lines
880 B
Rust
55 lines
880 B
Rust
#![feature(box_syntax)]
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trait Noisy {
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fn speak(&self);
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}
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struct Cat {
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meows : usize,
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how_hungry : isize,
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name : String,
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}
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impl Cat {
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pub fn eat(&self) -> bool {
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if self.how_hungry > 0 {
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println!("OM NOM NOM");
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self.how_hungry -= 2;
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return true;
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}
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else {
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println!("Not hungry!");
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return false;
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}
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}
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}
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impl Noisy for Cat {
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fn speak(&self) { self.meow(); }
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}
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impl Cat {
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fn meow(&self) {
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println!("Meow");
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self.meows += 1;
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if self.meows % 5 == 0 {
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self.how_hungry += 1;
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}
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}
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}
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fn cat(in_x : usize, in_y : isize, in_name: String) -> Cat {
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Cat {
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meows: in_x,
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how_hungry: in_y,
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name: in_name
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}
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}
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fn main() {
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let nyan: Box<Noisy> = box cat(0, 2, "nyan".to_string()) as Box<Noisy>;
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nyan.eat(); //~ ERROR no method named `eat` found
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}
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