SelectorList.hpp

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// This file is part of the Acts project.
//
// Copyright (C) 2018 CERN for the benefit of the Acts project
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.

#pragma once

#include "Acts/Utilities/detail/Extendable.hpp"
#include "Acts/Utilities/detail/MPL/all_of.hpp"
#include "Acts/Utilities/detail/MPL/has_duplicates.hpp"
#include "Acts/Utilities/detail/MPL/type_collector.hpp"
#include "Fatras/Kernel/detail/selector_list_implementation.hpp"
#include "Fatras/Kernel/detail/selector_signature_check.hpp"

namespace Fatras {

template <bool inclusive, typename... selectors>
struct SelectorListAXOR : private Acts::detail::Extendable<selectors...> {
private:
  static_assert(not Acts::detail::has_duplicates_v<selectors...>,
                "same selector type specified several times");

  using Acts::detail::Extendable<selectors...>::tuple;

public:
  using Acts::detail::Extendable<selectors...>::get;

  template <typename detector_t, typename particle_t>
  bool operator()(const detector_t &detector,
                  const particle_t &particle) const {
    // clang-format off
    static_assert(Acts::detail::all_of_v<detail::selector_list_signature_check_v<selectors, detector_t, particle_t>...>,
                  "not all particle selectors support the specified interface");
    // clang-format on

    // create an emtpy particle vector
    typedef detail::selector_list_impl<selectors...> impl;
    return impl::select(tuple(), detector, particle, inclusive);
  }
};

template <typename... selectors>
using SelectorListOR = SelectorListAXOR<true, selectors...>;

template <typename... selectors>
using SelectorListAND = SelectorListAXOR<false, selectors...>;

} // namespace Fatras