枚举 §

enum:

enum PokerSuit {
    Clubs(u8),
    Spades(u8),
    Diamonds(u8),
    Hearts(u8),
}
 
let heart5 = PokerSuit::Hearts(5);
let diamonds13 = PokerSuit::Diamonds(13);

enum Message {
    Quit,
    Move { x: i32, y: i32 },
    Write(String),
    ChangeColor(i32, i32, i32),
}
 
fn main() {
    let m1 = Message::Quit;
    let m2 = Message::Move{x:1,y:1};
    let m3 = Message::ChangeColor(255,255,0);
}