draconisplusplus/include/rfl/internal/get_meta_fields.hpp

#ifndef RFL_INTERNAL_GETMETAFIELDS_HPP_
#define RFL_INTERNAL_GETMETAFIELDS_HPP_

#include <array>
#include <tuple>
#include <utility>

#include "../MetaField.hpp"
#include "../type_name_t.hpp"

namespace rfl {
  namespace internal {

    template <class NamedTupleType, class... AlreadyExtracted>
    auto get_meta_fields(AlreadyExtracted&&... _already_extracted) {
      constexpr size_t i = sizeof...(_already_extracted);
      if constexpr (NamedTupleType::size() == i) {
        return std::array<MetaField, i> { std::move(_already_extracted)... };
      } else {
        using FieldType = std::tuple_element_t<i, typename NamedTupleType::Fields>;
        auto name       = typename FieldType::Name().str();
        auto type       = type_name_t<typename FieldType::Type>().str();
        return get_meta_fields<NamedTupleType>(
          std::move(_already_extracted)..., MetaField(std::move(name), std::move(type))
        );
      }
    }

  } // namespace internal
} // namespace rfl

#endif