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//@ run-pass
#![allow(dead_code)]
#![allow(non_camel_case_types)]
use std::fmt;
struct cat {
meows : usize,
how_hungry : isize,
name : String,
}
impl cat {
pub fn speak(&mut self) { self.meow(); }
pub fn eat(&mut self) -> bool {
if self.how_hungry > 0 {
println!("OM NOM NOM");
self.how_hungry -= 2;
return true;
}
else {
println!("Not hungry!");
return false;
}
}
}
impl cat {
fn meow(&mut self) {
println!("Meow");
self.meows += 1;
if self.meows % 5 == 0 {
self.how_hungry += 1;
}
}
}
fn cat(in_x : usize, in_y : isize, in_name: String) -> cat {
cat {
meows: in_x,
how_hungry: in_y,
name: in_name
}
}
impl fmt::Display for cat {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{}", self.name)
}
}
fn print_out(thing: Box<dyn ToString>, expected: String) {
let actual = (*thing).to_string();
println!("{}", actual);
assert_eq!(actual.to_string(), expected);
}
pub fn main() {
let nyan: Box<dyn ToString> = Box::new(cat(0, 2, "nyan".to_string())) as Box<dyn ToString>;
print_out(nyan, "nyan".to_string());
}
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