[英]How do I get the integer value of an enum?
It is possible to write constructions like this: 可以编写这样的结构:
enum Number {
One = 1,
Two = 2,
Three = 3,
Four = 4,
}
but for what purpose? 但出于什么目的? I can't find any method to get the value of an enum variant.
我找不到任何方法来获取枚举变量的值。
You get the value by casting the enum variant to an integral type: 通过将枚举变量强制转换为整数类型来获取值:
enum Thing {
A = 1,
B = 2,
}
fn main() {
println!("{}", Thing::A as u8);
println!("{}", Thing::B as u8);
}
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