mirror of
https://github.com/vdemydiuk/mtapi.git
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Viacheslav Demydiuk
37 lines
1.2 KiB
C++
Executable File
37 lines
1.2 KiB
C++
Executable File
// Copyright (c) 2023 Bela Schaum, X-Ryl669, Denis Mikhailov.
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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// Initial implementation by Bela Schaum, https://github.com/schaumb
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// The way to make it union and UB free by X-Ryl669, https://github.com/X-Ryl669
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//
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#ifndef BOOST_PFR_DETAIL_FAKE_OBJECT_HPP
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#define BOOST_PFR_DETAIL_FAKE_OBJECT_HPP
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#pragma once
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#include <boost/pfr/detail/config.hpp>
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namespace boost { namespace pfr { namespace detail {
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// This variable serves as a compile-time assert. If you see any error here, then
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// you're probably using `boost::pfr::get_name()` or `boost::pfr::names_as_array()` with a non-external linkage type.
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template <class T>
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extern const T passed_type_has_no_external_linkage;
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// For returning non default constructible types, it's exclusively used in member name retrieval.
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//
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// Neither std::declval nor boost::pfr::detail::unsafe_declval are usable there.
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// Limitation - T should have external linkage.
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template <class T>
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constexpr const T& fake_object() noexcept {
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return passed_type_has_no_external_linkage<T>;
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}
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}}} // namespace boost::pfr::detail
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#endif // BOOST_PFR_DETAIL_FAKE_OBJECT_HPP
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