Derive an enum's min and max values

[musjj]

It would be useful to have a derive macro that can automatically generate an enum's MIN and MAX.

For example, the following:

#[derive(MinMax)]
pub enum Foo {
    A,
    B,
    C,
}

Will generate this:

pub enum Foo {
    A,
    B,
    C,
}

impl Foo {
    const MIN: Self = Self::A;
    const MAX: Self = Self::C;
}

[martin-g]

You miss the type - enum in pub Foo

[musjj]

Whoops, fixed :)

[Peternator7]

Hi @musjj, could you elaborate on the scenario a little bit more? Is this just so you can match on patterns? I'm just not sure this scenario is super common.

fn is_min(&self) -> bool {
    matches!(Self::MIN, self)
}