Macro enum_dispatch

macro_rules! enum_dispatch {
    (
        $(#[$trait_attr:meta])*
        $trait_vis:vis trait $train_name:ident $(: $lf:lifetime)? $(: $super_trait1:ident $(::$super_trait2:ident)* $(+ $super_trait3:ident $(::$super_trait4:ident)*)*)? $(+ $lf2:lifetime)? {
            $($any:tt)*
        }

        $(#[$enum_attr:meta])*
        $enum_vis:vis enum $enum_name:ident {
            $($(#[$var_attr:meta])* $variant:ident($variant_type:ty)),+$(,)?
        }
    ) => { ... };
}