整理

include/boost/pfr/detail/core26.hpp

@@ -0,0 +1,39 @@
+// Copyright (c) 2016-2025 Antony Polukhin
+// Copyright (c) 2025 Jean-Michaël Celerier
+//
+// 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)
+
+// boost-no-inspect
+
+#ifndef BOOST_PFR_DETAIL_CORE26_HPP
+#define BOOST_PFR_DETAIL_CORE26_HPP
+#pragma once
+
+#include <boost/pfr/detail/sequence_tuple.hpp>
+
+namespace boost::pfr::detail {
+
+template<class T>
+constexpr auto tie_as_tuple(T &val) noexcept {
+    static_assert(!std::is_union<T>::value,
+                  "====================> Boost.PFR: For safety reasons it is forbidden to reflect "
+                  "unions. See `Reflection of unions` section in the docs for more info.");
+    auto &&[... members] = std::forward<T>(val);
+    return sequence_tuple::tuple<std::add_lvalue_reference_t<decltype(members)>...>{members...};
+}
+
+template <class T, class F, std::size_t... I>
+constexpr void for_each_field_dispatcher(T& t, F&& f, std::index_sequence<I...>) {
+    static_assert(
+        !std::is_union<T>::value,
+        "====================> Boost.PFR: For safety reasons it is forbidden to reflect unions. See `Reflection of unions` section in the docs for more info."
+    );
+    std::forward<F>(f)(
+        detail::tie_as_tuple(t)
+    );
+}
+
+} // namespace boost::pfr::detail
+
+#endif