整理

include/boost/pfr/detail/stdarray.hpp

@@ -0,0 +1,41 @@
+// 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 <boost/pfr/detail/sequence_tuple.hpp>
+
+#if !defined(BOOST_PFR_INTERFACE_UNIT)
+#include <array>
+#if BOOST_PFR_CORE_NAME_ENABLED
+#   include <string_view>
+#endif
+#include <utility> // metaprogramming stuff
+#endif
+
+namespace boost { namespace pfr { namespace detail {
+
+#if BOOST_PFR_CORE_NAME_ENABLED
+template <class T, std::size_t... I>
+constexpr auto make_stdarray_from_tietuple(const T& t, std::index_sequence<I...>) noexcept {
+    return std::array<std::string_view, sizeof...(I)>{
+        boost::pfr::detail::sequence_tuple::get<I>(t)...
+    };
+}
+#else
+template <class T, std::size_t... I>
+constexpr auto make_stdarray_from_tietuple(const T&, std::index_sequence<I...>) noexcept {
+    return nullptr;
+}
+#endif
+
+}}} // namespace boost::pfr::detail
+
+#endif // BOOST_PFR_DETAIL_STDARRAY_HPP
+