Macro cryptocorrosion_derive_traits 

#[doc(hidden)]
macro_rules! cryptocorrosion_derive_traits {
    (
        #[repr($repr:ident)]
        $(#[$attr:meta])*
        $vis:vis struct $name:ident $(<$($tyvar:ident),*>)?
        $(
            (
                $($tuple_field_vis:vis $tuple_field_ty:ty),*
            );
        )?

        $(
            {
                $($field_vis:vis $field_name:ident: $field_ty:ty,)*
            }
        )?
    ) => { ... };
    (@assert_allowed_struct_repr #[repr(transparent)]) => { ... };
    (@assert_allowed_struct_repr #[repr(C)]) => { ... };
    (@assert_allowed_struct_repr #[$_attr:meta]) => { ... };
    (
        @struct_padding_check #[repr(transparent)]
        $(($($tuple_field_ty:ty),*))?
        $({$($field_ty:ty),*})?
    ) => { ... };
    (
        @struct_padding_check #[repr(C)]
        $(($($tuple_field_ty:ty),*))?
        $({$($field_ty:ty),*})?
    ) => { ... };
    (
        #[repr(C)]
        $(#[$attr:meta])*
        $vis:vis union $name:ident {
            $(
                $field_name:ident: $field_ty:ty,
            )*
        }
    ) => { ... };
}