Macro ranged_num::define_ranged_enum

macro_rules! define_ranged_enum {
    (@inner_count ; $sum:ty ; $fst:ident, ) => { ... };
    (@inner_count ; $sum:ty ; $fst:ident, $($rest:ident,)*) => { ... };
    (@inner_match_from ; $idx:expr; $sum:ty ; $($i:ty : $arm:ident)*; ) => { ... };
    (@inner_match_from ; $idx:expr; $sum:ty ; $($i:ty : $arm:ident)*; $fst:ident, $($rest:ident,)*) => { ... };
    (@inner_match_to ; $name:ident; $idx:expr; $sum:ty ; $($i:ty : $arm:ident)*; ) => { ... };
    (@inner_match_to ; $name:ident; $idx:expr; $sum:ty ; $($i:ty : $arm:ident)*; $fst:ident, $($rest:ident,)*) => { ... };
    ($name:ident, Derive($($derive:ident),* $(,)?), $($x:ident),+ $(,)?) => { ... };
    ($name:ident, $($x:ident),+ $(,)?) => { ... };
}

Define a new enum which can be convered to and from a Ranged usize.

Example:

use ranged_num::{define_ranged_enum, UZeroTo};

define_ranged_enum!(Example, Derive(Debug, PartialEq, Eq), A, B, C);

let x: UZeroTo<_> = Example::A.into();
assert_eq!(x.value(), 0);

let x = x.wrapped_add(5);

let y: Example = x.into();
assert_eq!(y, Example::C);