TrackStateSorters.hpp

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// This file is part of the Acts project.
//
// Copyright (C) 2016-2018 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

namespace Acts {
struct TrackStatePathLengthSorter {
 public:
  template <typename identifier_t, typename parameters_t>
  bool operator()(const TrackState<identifier_t, parameters_t>& lhs,
                  const TrackState<identifier_t, parameters_t>& rhs) {
    return lhs.parameter.pathLength < rhs.parameter.pathLength;
  }
};
}  // namespace Acts