Macro flatdata::define_variadic_struct

macro_rules! define_variadic_struct {
    ($name:ident, $item_builder_name:ident, $index_type:path,
        $($type_index:expr => ($type:tt, $add_type_fn:ident)),+) => { ... };
}

Macro used by generator to define a flatdata variant used in MultiVector and MultiArrayView.