Message wrapper macro initial

message_wrapper.rs

#[macro_export]
macro_rules! derive_message_wrapper {
    ($type_name:tt<$($lifetime:tt),+>, $msg_id:pat => $parse_func:expr, $alloc_func:expr, $free_func:expr) => (
        derive_message_wrapper!($type_name<$($lifetime),+>, [$msg_id => $parse_func], $alloc_func, $free_func);
    );

    ($type_name:tt<$($lifetime:tt),+>, [$($msg_id:pat => $parse_func:expr),+], $alloc_func:expr, $free_func:expr) => (
        impl<$($lifetime),+> $crate::bindings::message_dispatcher::TryFrom<*mut $crate::bindings::message_dispatcher::message> for $type_name {
            derive_message_wrapper!(@try_from_impl_payload $type_name<$($lifetime),+>, [$($msg_id => $parse_func),+]);
        }
    );

    ($type_name:ty, $msg_id:ident => $parse_func:expr, $alloc_func:expr, $free_func:expr) => (
        derive_message_wrapper!($type_name, [$msg_id => $parse_func], $alloc_func, $free_func);
    );

    ($type_name:ty, [$($msg_id:ident => $parse_func:expr),+], $alloc_func:expr, $free_func:expr) => (
        impl $crate::bindings::message_dispatcher::TryFrom<*mut $crate::bindings::message_dispatcher::message> for $type_name {
            derive_message_wrapper!(@try_from_impl_payload $type_name, [$($msg_id => $parse_func),+]);
        }
    );

    (@try_from_impl_payload $type_name:ty, [$($msg_id:ident => $parse_func:expr),+]) => (
        type Error = ();

        fn try_from(raw_ptr: *mut $crate::bindings::message_dispatcher::message) -> Result<$type_name, Self::Error> {
            unsafe {
                if raw_ptr.is_null() || (*raw_ptr).data.is_null() {
                    return Err(());
                }

                match (*raw_ptr).msg_type {
                    $($msg_id => $parse_func((*raw_ptr).data),)+
                    _ => Err(())
                }
            }
        }
    );

    (@try_from_impl_no_payload) => ();
}