// Must derive `Debug` so `println!` can be used.
// `allow` required to silence warnings because only
// one variant is used.
#[allow(dead_code)]
#[derive(Debug)]
enum Color {
// These 3 are specified solely by their name.
Red,
Blue,
Green,
// This requires 3 `i32`s and a name.
RGB(i32, i32, i32),
}
fn main() {
let color = Color::RGB(122, 17, 40);
// TODO ^ Try different variants for `color`
println!("What color is it?");
// An `enum` can be destructured using a `match`.
match color {
Color::Red => println!("The color is Red!"),
Color::Blue => println!("The color is Blue!"),
Color::Green => println!("The color is Green!"),
Color::RGB(r, g, b) => {
println!("Red: {:?}, green: {:?}, and blue: {:?}!:", r, g, b);
},
// Don't need another arm because all variants have been examined
}
}