#pragma once

#if __cplusplus >= 202002L

#include <stdx/tuple.hpp>

#include <cstddef>
#include <tuple>
#include <type_traits>
#include <utility>

template <typename... Ts>
struct std::tuple_size<stdx::tuple<Ts...>>
    : std::integral_constant<std::size_t, sizeof...(Ts)> {};
template <std::size_t I, typename... Ts>
struct std::tuple_element<I, stdx::tuple<Ts...>>
    : std::type_identity<std::remove_cvref_t<
          decltype(std::declval<stdx::tuple<Ts...>>()[stdx::index<I>])>> {};

template <typename IL, typename... Ts>
struct std::tuple_size<stdx::indexed_tuple<IL, Ts...>>
    : std::integral_constant<std::size_t, sizeof...(Ts)> {};
template <std::size_t I, typename IL, typename... Ts>
struct std::tuple_element<I, stdx::indexed_tuple<IL, Ts...>>
    : std::type_identity<
          std::remove_cvref_t<decltype(std::declval<stdx::indexed_tuple<
                                           IL, Ts...>>()[stdx::index<I>])>> {};

#endif