Direct.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 EXTERNAL_FIELD_COUPLING_DIRECT_HPP
#define EXTERNAL_FIELD_COUPLING_DIRECT_HPP
 
#include <utility>
 
namespace FieldCoupling {
namespace Coupling {
class Direct {
public:
  static constexpr bool is_linear = true;
  template <typename T, typename Particle>
  T &&operator()(const Particle &, T &&x) const {
    return std::forward<T>(x);
  }
};
} // namespace Coupling
} // namespace FieldCoupling
 
#endif