Single value enum

[yanshay]

I have the following enum:

enum LightLevel {
    Off,
    On,
    Range(u8)
}

This at the bytes level should translate to a single u8, with Off=0, On=100, Range is represented by the value it contains.

I couldn't find a way to implement this with Deku (need both read and write). Is it doable?

Maybe with a writer I can do that, but I want to define it at the enum level and not at the field level (since it will be used as field in many structs).

Maybe map attribute could help but it is only for read and I need also write (I couldn't find a reverse map).

[wcampbell0x2a]

You want https://docs.rs/deku/latest/deku/attributes/index.html#id_pat

#[derive(DekuRead, DekuWrite)]
#[deku(type = "u16")]
enum DekuTest {
    #[deku(id = "0x01")]
    VariantA,

    #[deku(id = "0x100")]
    VariantB,

    #[deku(id_pat = "_")]
    Range(u16),
}

[yanshay]

Thanks, exactly what I was looking for.