Rust traits: Difference between revisions
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// use trait as param type | // use trait as param type | ||
fn play_with_pet(pet: &impl Pet) { | fn play_with_pet(pet: &impl Pet) { |
Revision as of 19:52, 8 February 2023
Traits are similar to interfaces except they can have a default implementation.
Basics
struct Cat { name: String } struct Dog { name: String, breed: String } // all implementors of 'Pet' must have method 'play' with this method signature trait Pet { fn play(&self); } impl Pet for Cat { fn play(&self) { println!("you give a ball of yarn to {}", self.name) } }// use trait as param type fn play_with_pet(pet: &impl Pet) { pet.play(); } fn main(){ let cat = Cat{name: "maize".to_string()}; let dog = Dog{name: "midnight".to_string(), breed: "?".to_string()}; play_with_pet(&cat); play_with_pet(&dog); }