Macro macro_bits::generate_conversions

macro_rules! generate_conversions {
    (u8, $representation:ty, $target_type:ty) => { ... };
    (u16, $representation:ty, $target_type:ty) => { ... };
    (u32, $representation:ty, $target_type:ty) => { ... };
    (u64, $representation:ty, $target_type:ty) => { ... };
    ($to:ty, $representation:ty, $target_type:ty, $_:expr) => { ... };
}