// Copyright (c) 2016-2020 Antony Polukhin
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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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#ifndef BOOST_PFR_DETAIL_FOR_EACH_FIELD_IMPL_HPP
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#define BOOST_PFR_DETAIL_FOR_EACH_FIELD_IMPL_HPP
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#pragma once
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#include <boost/pfr/detail/config.hpp>
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#include <utility> // metaprogramming stuff
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#include <boost/pfr/detail/sequence_tuple.hpp>
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#include <boost/pfr/detail/rvalue_t.hpp>
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namespace boost { namespace pfr { namespace detail {
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template <std::size_t Index>
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using size_t_ = std::integral_constant<std::size_t, Index >;
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template <class T, class F, class I, class = decltype(std::declval<F>()(std::declval<T>(), I{}))>
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void for_each_field_impl_apply(T&& v, F&& f, I i, long) {
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std::forward<F>(f)(std::forward<T>(v), i);
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}
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template <class T, class F, class I>
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void for_each_field_impl_apply(T&& v, F&& f, I /*i*/, int) {
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std::forward<F>(f)(std::forward<T>(v));
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}
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template <class T, class F, std::size_t... I>
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void for_each_field_impl(T& t, F&& f, std::index_sequence<I...>, std::false_type /*move_values*/) {
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const int v[] = {(
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detail::for_each_field_impl_apply(sequence_tuple::get<I>(t), std::forward<F>(f), size_t_<I>{}, 1L),
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0
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)...};
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(void)v;
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}
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template <class T, class F, std::size_t... I>
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void for_each_field_impl(T& t, F&& f, std::index_sequence<I...>, std::true_type /*move_values*/) {
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const int v[] = {(
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detail::for_each_field_impl_apply(sequence_tuple::get<I>(std::move(t)), std::forward<F>(f), size_t_<I>{}, 1L),
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0
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)...};
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(void)v;
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}
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}}} // namespace boost::pfr::detail
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#endif // BOOST_PFR_DETAIL_FOR_EACH_FIELD_IMPL_HPP
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