Macro catalyst_entities::transmute_arkive

macro_rules! transmute_arkive {
    ($($name:ident($ty:ty => $repr:ty))*) => { ... };
    ($name:ident, $ty:ty, $repr:ty) => { ... };
}

Whevever ArckiveWith needs to be implemented on for example fieldless enum, this macro can implement it by transmuting it to type that implements Archive.

use catalyst_entities::transmute_arkive;
use rkyv::{Archive, Serialize, Deserialize};

enum Foo {
   A, B, B,
}

transmute_arkive! {
   FooArchiver(Foo => u8),
}

#[derive(Archive, Serialize, Deserialize)]
struct Bar {
    #[with(FooArchiver)]
    foo: Foo,
}

Note that this macro can be missued if type contains indirection, simpli transmuting references and pointers will almost certainly lead to UB upon deserialization.