Programmatically convert enum with associated data to repr value

⚓ Rust 📅 2025-07-16 👤 surdeus 👁️ 20

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This post is auto-generated from RSS feed The Rust Programming Language Forum - Latest topics. Source: Programmatically convert enum with associated data to repr value

If I have

#[repr(u8)]
enum Foo {
    Bar = 0x01,
    Spamm = 0x02,
}

Then I can get the variant's associated value via

let e = Foo:: Bar;
let val = e as u8;

However, this naive approach does not work when the enum has associated data:

#[repr(u8)]
enum Foo {
    Bar(u16) = 0x01,
    Spamm(String) = 0x02,
}

Is there a native way to get the associated tag value of the enum, short of using a macro or third-party library?

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