How to Implement the Command Pattern in Rust

Core
2026-04-17T12:05:42+00:00
Implement the Command pattern in Rust by defining a trait for actions and using an invoker to execute them dynamically.

Implement the Command pattern in Rust by defining a Command trait with an execute method, creating structs that implement this trait for specific actions, and using a Invoker to store and run these commands.

trait Command {
    fn execute(&self);
}

struct TurnOnLight;
impl Command for TurnOnLight {
    fn execute(&self) { println!("Light is ON"); }
}

struct Invoker {
    command: Box<dyn Command>,
}

impl Invoker {
    fn new(command: Box<dyn Command>) -> Self {
        Invoker { command }
    }
    fn invoke(&self) {
        self.command.execute();
    }
}

fn main() {
    let light_on = Box::new(TurnOnLight);
    let invoker = Invoker::new(light_on);
    invoker.invoke();
}