// An attribute to hide warnings for unused code.
#![allow(dead_code)]
// 使用隐式辨别值(discriminator)(从 0 开始)
enum Number {
Zero,
One,
Two,
}
// 使用显式指定辨别值(discriminator)
enum Color {
Red = 0xff0000,
Green = 0x00ff00,
Blue = 0x0000ff,
}
fn main() {
// `enums`能被作为整数计算.
println!("zero is {}", Number::Zero as i32);
println!("one is {}", Number::One as i32);
// 这里可以尝试使用`use`关键字来省略'Color::'
println!("roses are #{:06x}", Color::Red as i32);
println!("violets are #{:06x}", Color::Blue as i32);
}