tuple.hpp

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/*
 * Copyright (C) 2010-2022 The ESPResSo project
 *
 * This file is part of ESPResSo.
 *
 * ESPResSo is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * ESPResSo is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
#ifndef ESPRESSO_TUPLE_HPP
#define ESPRESSO_TUPLE_HPP
/**
 * @file
 * Algorithms for tuple-like inhomogeneous containers.
 */
 
#include "utils/get.hpp"
#include "utils/type_traits.hpp"
 
#include <cstddef>
#include <tuple>
#include <type_traits>
#include <utility>
 
namespace Utils {
namespace detail {
template <class Tuple, class F, std::size_t... I>
constexpr void for_each_impl(F &&f, Tuple t, std::index_sequence<I...>) {
  using expand = int[];
  std::ignore = expand{0, ((void)(f(std::get<I>(t))), 0)...};
}
 
template <class F, class Tuple>
constexpr void for_each_impl(F, Tuple, std::index_sequence<>) {}
} // namespace detail
 
template <class F, class Tuple> void for_each(F &&f, Tuple &t) {
  detail::for_each_impl<Tuple &>(
      std::forward<F>(f), t,
      std::make_index_sequence<std::tuple_size<Tuple>::value>{});
}
 
template <class F, class Tuple> void for_each(F &&f, Tuple &&t) {
  detail::for_each_impl(
      std::forward<F>(f), std::forward<Tuple>(t),
      std::make_index_sequence<
          std::tuple_size<std::remove_reference_t<Tuple>>::value>{});
}
 
} // namespace Utils
 
#endif // ESPRESSO_TUPLE_HPP