Enums as components

[Nertsal]

Can something like this be allowed?

#[derive(SplitFields)]
enum AiType {
    Crawler,
    Shooter { some_data: i64 },
}

#[derive(SplitFields)]
struct Unit {
    #[split(nested)]
    ai_type: AiType,
    // other fields
}

Perhaps it could be represented as:

#[derive(SplitFields)]
struct AiTypeCrawler {}

#[derive(SplitFields)]
struct AiTypeShooter {
    some_data: i64,
}

struct AiTypeStructOf<F: StorageFamily> {
    Crawler: F::Storage<Option<AiTypeCrawler::StructOf<F>>>,
    Shooter: F::Storage<Option<AiTypeShooter::StructOf<F>>>,
}

And then queries could look like:

for (pos, crawler_ai) in query!(world.units, (&position, &ai_type.Crawler.Get.Some)) { }

Thought, ideally, .Get.Some could be omitted since it is already implied by the enum.