Macro decodable_enum

macro_rules! decodable_enum {
    ($(#[$meta:meta])* $visibility:vis enum $name:ident<
        $raw_type:ty,
        $error_type:ident,
        $error_path:ident
    > {
        $($(#[$variant_meta:meta])* $variant:ident = $val:expr),*,
    }) => { ... };
}

Generates an enum value where each variant can be converted into a constant in the given raw_type.

For example: decodable_enum! { pub(crate) enum Color<u8, MyError, MyError::Variant> { Red = 1, Blue = 2, Green = 3, } }

Color::try_from(2) -> Color::Red u8::from(&Color::Red) -> 1.