Note #7

I’ve been looking at Rust recently and I wrote a small Rust program that uses traits, a concept very similar to interfaces in other languages. There’s a lot to learn but this seems reasonable.

struct Message {
    id: i32,
    text: String,
}

trait Printer {
    fn print(&self, value: &str);
}

struct ConsolePrinter {}

impl Printer for ConsolePrinter {
    fn print(&self, value: &str) {
        println!("{}", value);
    }
}

fn main() {
    let messages = vec![
        Message {
            id: 1,
            text: String::from("Hello world"),
        },
        Message {
            id: 2,
            text: String::from("How are you?"),
        },
        Message {
            id: 3,
            text: String::from("Goodbye"),
        },
    ];

    let printer = ConsolePrinter {};

    for message in &messages {
        printer.print(&message.text)
    }
}