// So I want a macro that will generate this kind of construction:
//
// #[repr(u8)]
// #[derive(Clone, Copy, Debug)]
// #[allow(dead_code)]
// pub enum CommonCommand {
//     SelectFile = 0xa4,
//     GetResponse = 0xc0,
// }
//
// impl Into<u8> for CommonCommand {
//     fn into(&self) -> u8 {
//         (*self) as u8
//     }
// }
//
// from something like this (happy to change the syntax):
//
// command_type! {
//     CommonCommand {
//         SelectFile = 0xa4,
//         GetResponse = 0xc0,
//     }
// }

macro_rules! command_type {
    ( $name:ident { $($val:expr),+ } ) => {{
        #[repr(u8)]
        #[derive(Clone, Copy, Debug)]
        #[allow(dead_code)]
        pub enum $name {
            $($val),+
        }

        impl Into<u8> for $name {
            fn into(&self) -> u8 {
                (*self) as u8
            }
        }
    }}
}

command_type! {
    CommonCommand {
        SelectFile = 0xa4,
        GetResponse = 0xc0,
    }
}