draconisplusplus/include/rfl/internal/move_to_field_tuple.hpp

#ifndef RFL_INTERNAL_MOVE_TO_FIELD_TUPLE_HPP_
#define RFL_INTERNAL_MOVE_TO_FIELD_TUPLE_HPP_

#include <tuple>
#include <type_traits>

#include "../field_names_t.hpp"
#include "Array.hpp"
#include "bind_to_tuple.hpp"
#include "has_fields.hpp"
#include "is_empty.hpp"
#include "is_named_tuple.hpp"
#include "wrap_in_fields.hpp"

namespace rfl {
  namespace internal {

    template <class OriginalStruct>
    auto move_to_field_tuple(OriginalStruct&& _t) {
      using T = std::remove_cvref_t<OriginalStruct>;
      if constexpr (is_named_tuple_v<T>) {
        return _t.fields();
      } else if constexpr (has_fields<T>()) {
        return bind_to_tuple(_t, [](auto& x) { return std::move(x); });
      } else if constexpr (is_empty<T>()) {
        return std::tuple();
      } else {
        using FieldNames = field_names_t<T>;
        const auto fct   = []<class T>(T& _v) {
          using Type = std::remove_cvref_t<T>;
          if constexpr (std::is_array_v<Type>) {
            return Array<Type>(_v);
          } else {
            return std::move(_v);
          }
        };
        auto tup = bind_to_tuple(_t, fct);
        return wrap_in_fields<FieldNames>(std::move(tup));
      }
    }

  } // namespace internal
} // namespace rfl

#endif