《Rust Programming Language》- EX - Cheatsheet

struct ColorClassicStruct {
    red: i32,
    green: i32,
    blue: i32,
}


let green = ColorClassicStruct {
    red: 0,
    green: 255,
    blue: 0,
};

assert_eq!(green.red, 0);
assert_eq!(green.green, 255);
assert_eq!(green.blue, 0);

struct ColorTupleStruct(i32, i32, i32);


let green = ColorTupleStruct(0, 255, 0);

assert_eq!(green.0, 0);
assert_eq!(green.1, 255);
assert_eq!(green.2, 0);

struct UnitLikeStruct;


let unit_like_struct = UnitLikeStruct;
let message = format!("{:?}s are fun!", unit_like_struct);

enum Message {
    Quit,
    Move(Point),
    Echo(String),
    ChangeColor((u8, u8, u8)),
}

fn triggerSpecificEvent(message: Message) {
    // TODO: create a match expression to process the different message variants
    match message {
        Message::ChangeColor((a, b, c)) => change_color((a, b, c)),
        Message::Echo(s) => echo(s),
        Message::Move(p) => move_position(p),
        Message::Quit => quit(),
    }
}