TupleGenerate.h

/**************************************************************************
 * basf2 (Belle II Analysis Software Framework)                           *
 * Author: The Belle II Collaboration                                     *
 *                                                                        *
 * See git log for contributors and copyright holders.                    *
 * This file is licensed under LGPL-3.0, see LICENSE.md.                  *
 **************************************************************************/
#pragma once
 
#include <tuple>
#include <utility>
 
namespace Belle2 {
  namespace TrackFindingCDC {
 
    template< template<size_t> class AGenerator, class AIndexSequence>
    struct TupleGenerateImpl {};
 
    template< template<size_t> class AGenerator, size_t ... Is>
    struct TupleGenerateImpl<AGenerator, std::index_sequence<Is...> > {
      using type = std::tuple<AGenerator<Is>...>;
    };
 
    template< template<size_t> class AFunction, class AIndexSequence>
    using TupleGenerate = typename TupleGenerateImpl<AFunction, AIndexSequence>::type;
 
    template< template<size_t> class AFunction, size_t N>
    using TupleGenerateN = TupleGenerate<AFunction, std::make_index_sequence<N> >;
  }
}