#![cfg_attr(not(feature = "std"), no_std)]
pub struct Dog {}
pub struct Cat {}
pub trait Speaks {
fn speak(&self);
}
pub trait Animal {
fn animal_type(&self) -> &str;
fn noise(&self) -> &str;
}
impl<T> Speaks for T where T: Animal {
fn speak(&self) {
// println!("The {} said {}", self.animal_type(), self.noise());
}
}
impl Animal for Dog {
fn animal_type(&self) -> &str {
"dog"
}
fn noise(&self) -> &str {
"woof"
}
}
impl Animal for Cat {
fn animal_type(&self) -> &str {
"cat"
}
fn noise(&self) -> &str {
"meow"
}
}