How to convert an enum variant into u8 in Rust?

Quick Fix: You will have to define the value of each variant manually, and use as instead of .into() for conversion, since Into<u8> is not implemented by MessageType:

#[repr(u8)]
pub enum MessageType {
    Authentication = 1,
    // ...
}

fn main() {
    let n = MessageType::Authentication as u8;
    println!("{}\n", n);
}

The Problem:

In Rust, I have an enum with a #[repr(u8)] attribute, and I want to convert a variant of that enum to a u8. How can I do this without implementing the into() method manually?

Q&A

Convert enum variant into u8 in Rust?

—

You will have to define the value of each variant manually, and use as instead of .into() for conversion

How can I convert an enum variant into u8 without defining the value of each variant manually?

—

There is no way to do this without defining the value of each variant manually

Video Explanation:

The following video, titled "0412 -- Rust RFC-compliant URI parser/generator - YouTube", provides additional insights and in-depth exploration related to the topics discussed in this post.