opm-simulators/opm/simulators/linalg/ilufirstelement.hh

// -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
// vi: set et ts=4 sw=4 sts=4:
/*
  This file is part of the Open Porous Media project (OPM).

  OPM 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 2 of the License, or
  (at your option) any later version.

  OPM 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 OPM.  If not, see <http://www.gnu.org/licenses/>.

  Consult the COPYING file in the top-level source directory of this
  module for the precise wording of the license and the list of
  copyright holders.
*/

#ifndef EWOMS_ILU_FIRSTELEMENT_HH
#define EWOMS_ILU_FIRSTELEMENT_HH
#include <dune/common/version.hh>
#include <opm/simulators/linalg/matrixblock.hh>

namespace Opm
{
template<class K, int n, int m>
#if DUNE_VERSION_GTE(DUNE_GRID, 2, 8)
K& firstMatrixElement(MatrixBlock<K, n, m>& A)
#else
K& firstmatrixelement(MatrixBlock<K, n, m>& A)
#endif
{ return A[0][0]; }
}
#endif // EWOMS_ILU_FIRSTELEMENT_HH