Macro bit_struct::bit_struct

macro_rules! bit_struct {
    ($($(#[doc = $struct_doc : expr]) * $(#[derive($($struct_der : ident), +)]) ?
   $struct_vis : vis struct $name : ident($kind : ty)
   {
       $($(#[doc = $field_doc : expr]) * $field :
         ident($start : literal, $end : literal) : $actual : ty), * $(,) ?
   }) *) => { ... };
}

Create a bit struct. Look at tests folder to see examples.