如何获取枚举的整数值? [英] How do I get the integer value of an enum?

问题描述

可以这样写结构:

enum Number {
    One = 1,
    Two = 2,
    Three = 3,
    Four = 4,
}

但目的是什么?我找不到任何方法来获取枚举变量的值.

but for what purpose? I can't find any method to get the value of an enum variant.

推荐答案

您可以通过将枚举变量转换为整数类型来获取值:

You get the value by casting the enum variant to an integral type:

enum Thing {
    A = 1,
    B = 2,
}

fn main() {
    println!("{}", Thing::A as u8);
    println!("{}", Thing::B as u8);
}

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