42 lines
1.2 KiB
C++
42 lines
1.2 KiB
C++
// Copyright (c) 2023 Denis Mikhailov
|
|
//
|
|
// Distributed under the Boost Software License, Version 1.0. (See accompanying
|
|
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
|
|
#ifndef BOOST_PFR_DETAIL_STDARRAY_HPP
|
|
#define BOOST_PFR_DETAIL_STDARRAY_HPP
|
|
#pragma once
|
|
|
|
#include <boost/pfr/detail/config.hpp>
|
|
|
|
#include <utility> // metaprogramming stuff
|
|
#include <array>
|
|
#include <type_traits> // for std::common_type_t
|
|
#include <cstddef>
|
|
|
|
#include <boost/pfr/detail/sequence_tuple.hpp>
|
|
|
|
namespace boost { namespace pfr { namespace detail {
|
|
|
|
template <class... Types>
|
|
constexpr auto make_stdarray(const Types&... t) noexcept {
|
|
return std::array<std::common_type_t<Types...>, sizeof...(Types)>{t...};
|
|
}
|
|
|
|
template <class T, std::size_t... I>
|
|
constexpr auto make_stdarray_from_tietuple(const T& t, std::index_sequence<I...>, int) noexcept {
|
|
return detail::make_stdarray(
|
|
boost::pfr::detail::sequence_tuple::get<I>(t)...
|
|
);
|
|
}
|
|
|
|
template <class T>
|
|
constexpr auto make_stdarray_from_tietuple(const T&, std::index_sequence<>, long) noexcept {
|
|
return std::array<std::nullptr_t, 0>{};
|
|
}
|
|
|
|
}}} // namespace boost::pfr::detail
|
|
|
|
#endif // BOOST_PFR_DETAIL_STDARRAY_HPP
|
|
|