indexhelper.hh

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// -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
// vi: set et ts=4 sw=4 sts=4:
//
// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
// SPDX-License-Identifier: GPL-3.0-or-later
//
#ifndef DUMUX_MD_FREEFLOW_POROUSMEDIUM_INDEX_HELPER_HH
#define DUMUX_MD_FREEFLOW_POROUSMEDIUM_INDEX_HELPER_HH
 
#include <dune/common/indices.hh>
 
namespace Dumux::FreeFlowPorousMediumCoupling {
 
template<std::size_t freeFlowIdx, std::size_t porousMediumIndex, class FFFS, bool hasAdapter>
struct IndexHelper;
 
template<std::size_t freeFlowIdx, std::size_t porousMediumIndex, class FFFS>
struct IndexHelper<freeFlowIdx, porousMediumIndex, FFFS, false>
{
    template<std::size_t i>
    static constexpr auto couplingPhaseIdx(Dune::index_constant<i>, int coupledPhaseIdx = 0)
    { return coupledPhaseIdx; }
 
    template<std::size_t i>
    static constexpr auto couplingCompIdx(Dune::index_constant<i>, int coupledCompdIdx)
    { return coupledCompdIdx; }
};
 
template<std::size_t freeFlowIdx, std::size_t porousMediumIndex, class FFFS>
struct IndexHelper<freeFlowIdx, porousMediumIndex, FFFS, true>
{
    static constexpr int couplingPhaseIdx(Dune::index_constant<freeFlowIdx>, int coupledPhaseIdx = 0)
    { return 0; }
 
    static constexpr auto couplingPhaseIdx(Dune::index_constant<porousMediumIndex>, int coupledPhaseIdx = 0)
    { return FFFS::multiphaseFluidsystemPhaseIdx; }
 
    static constexpr auto couplingCompIdx(Dune::index_constant<freeFlowIdx>, int coupledCompIdx)
    { return coupledCompIdx; }
 
    static constexpr auto couplingCompIdx(Dune::index_constant<porousMediumIndex>, int coupledCompIdx)
    { return FFFS::compIdx(coupledCompIdx); }
};
 
} // end namespace Dumux::FreeFlowPorousMediumCoupling
 
#endif