Macro device 

macro_rules! device {
    (
        #[device(identifier = $identifier:literal)]
        $(#[$doc:meta])*
        $vis:vis struct $device_name:ident;

        $(
            impl $trait_name:ident {
                $(
                    #[device(invoke = $invoke_name:literal)]
                    fn $fn_name:ident $(<$($generic:ident),+ $(,)?>)? (&self $(, $($param_name:ident : $param_ty:ty),* $(,)?)?) $(-> $ret_ty:ty)?;
                )+
            }
        )+

    ) => { ... };
}